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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
þANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 2016
OR
¨TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Transition Period from              to             
OF THE SECURITIES EXCHANGE ACT OF 1934
For the Fiscal Year Ended December 31, 2019
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
For the Transition Period from to
Commission
File Number
 
Registrant,
State of Incorporation,
Address and Telephone Number
 
I.R.S. Employer
Identification No.
1-3526 The Southern Company 58-0690070
(A Delaware Corporation)
30 Ivan Allen Jr. Boulevard, N.W.
Atlanta, Georgia 30308
(404) 506-5000
(A Delaware Corporation)
 30 Ivan Allen Jr. Boulevard, N.W.
Atlanta, Georgia 30308
(404) 506-5000
1-3164 Alabama Power Company 63-0004250
(An Alabama Corporation)
600 North 18th Street
Birmingham, Alabama 35203
(205) 257-1000
(An Alabama Corporation)
 600 North 18th Street
Birmingham, Alabama 35291
(205) 257-1000
1-6468 Georgia Power Company 58-0257110
(A Georgia Corporation)
241 Ralph McGill Boulevard, N.E.
Atlanta, Georgia 30308
(404) 506-6526
(A Georgia Corporation)
 241 Ralph McGill Boulevard, N.E.
Atlanta, Georgia 30308
(404) 506-6526
001-31737Gulf Power Company59-0276810
(A Florida Corporation)
One Energy Place
Pensacola, Florida 32520
(850) 444-6111
001-11229 Mississippi Power Company 64-0205820
(A Mississippi Corporation)
2992 West Beach Boulevard
Gulfport, Mississippi 39501
(228) 864-1211
(A Mississippi Corporation)
 2992 West Beach Boulevard
Gulfport, Mississippi 39501
(228) 864-1211
001-37803 Southern Power Company 58-2598670
(A Delaware Corporation)
30 Ivan Allen Jr. Boulevard, N.W.
Atlanta, Georgia 30308
(404) 506-5000
(A Delaware Corporation)
 30 Ivan Allen Jr. Boulevard, N.W.
Atlanta, Georgia 30308
(404) 506-5000
1-14174 Southern Company Gas 58-2210952
(A Georgia Corporation)
Ten Peachtree Place, N.E.
Atlanta, Georgia 30309
(404) 584-4000
 


(A Georgia Corporation)

Ten Peachtree Place, N.E.
Securities registered pursuant to Section 12(b) of the Act:1Atlanta, Georgia 30309
Each of the following classes or series of securities registered pursuant to Section 12(b) of the Act is listed on the New York Stock Exchange.(404) 584-4000
Title of each classRegistrant
Common Stock, $5 par valueThe Southern Company
     



Securities registered pursuant to Section 12(b) of the Act:
RegistrantTitle of Each Class
Trading
Symbol(s)
Name of Each Exchange
on Which Registered
The Southern CompanyCommon Stock, par value $5 per shareSONew York Stock Exchange
(NYSE)
The Southern CompanySeries 2015A 6.25% Junior Subordinated Notes $25 denominations
6.25% Series 2015A due 2075SOJANYSE
5.25% The Southern CompanySeries 2016A 5.25% Junior Subordinated Notes due 2076SOJBNYSE
The Southern CompanySeries 2017B 5.25% Junior Subordinated Notes due 2077SOJCNYSE
The Southern Company2019 Series A Corporate UnitsSOLNNYSE
The Southern CompanySeries 2020A 4.95% Junior Subordinated Notes due 2080SOJDNYSE
Class A preferred stock, cumulative, $25 stated capitalAlabama Power Company
5.83%5.00% Series
Class A preferred stock, non-cumulative,
Par value $25 per share
Preferred Stock
ALP PR QNYSE
Georgia Power Company
6 1/8% Series 2017A 5.00% Junior Subordinated Notes due 2077GPJANYSE
Depositary preferred shares, each representing one-fourth of a share of preferred stock, cumulative, $100 par valueMississippi Power Company
5.25% Series
Senior NotesSouthern Power Company
1.000% Series 2016A 1.000% Senior Notes due 2022SO/22BNYSE
1.850% Southern Power CompanySeries 2016B 1.850% Senior Notes due 2026SO/26A
Securities registered pursuant to Section 12(g) of the Act:1
Title of each classRegistrant
Preferred stock, cumulative, $100 par valueAlabama Power Company
4.20% Series           ��                          4.60% Series4.72% Series        
4.52% Series                                      4.64% Series4.92% Series        
Preferred stock, cumulative, $100 par valueMississippi Power Company
4.40% Series                                      4.60% Series
4.72% Series
NYSE

Securities registered pursuant to Section 12(g) of the Act:(*)
1RegistrantAsTitle of Each Class
Alabama Power CompanyPreferred stock, cumulative, $100 par value:
4.20% Series
4.52% Series
4.60% Series
4.64% Series
4.72% Series
4.92% Series
(*)At December 31, 2016.2019


Table of ContentsIndex to Financial Statements

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

RegistrantYesNo
The Southern CompanyX 
Alabama Power CompanyX 
Georgia Power CompanyX 
Gulf Power CompanyX
Mississippi Power Company X
Southern Power CompanyXX
Southern Company GasXX
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No x (Response applicable to all registrants.)
Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. Yes x No ¨
Indicate by check mark whether the registrants have submitted electronically and posted on their corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrants were required to submit and post such files). Yes x No ¨
Indicate by check mark if disclosure

Table of delinquent filers pursuantContentsIndex to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrants' knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ¨Financial Statements

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer"filer," "smaller reporting company," and "smaller reporting"emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):
Registrant
Large
Accelerated
Filer
Accelerated
Filer
Non-accelerated
Filer
Smaller
Reporting
Company
Emerging Growth Company
The Southern CompanyX   
Alabama Power Company  X 
Georgia Power Company  X 
Gulf Power CompanyX 
Mississippi Power Company  X 
Southern Power Company  X 
Southern Company Gas  X 
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes¨ No x (Response applicable to all registrants.)


Table of ContentsIndex to Financial Statements

Aggregate market value of The Southern Company's common stock held by non-affiliates of The Southern Company at June 30, 2016: $51.128, 2019: $57.8 billion. All of the common stock of the other registrants is held by The Southern Company. A description of each registrant's common stock follows:

Registrant 
Description of
Common Stock
 
Shares Outstanding
at January 31, 2017
2020
The Southern Company Par Value $5 Per Share 991,051,1611,054,228,409

Alabama Power Company Par Value $40 Per Share 30,537,500

Georgia Power Company Without Par Value 9,261,500
Gulf Power CompanyWithout Par Value7,392,717

Mississippi Power Company Without Par Value 1,121,000

Southern Power Company Par Value $0.01 Per Share 1,000

Southern Company Gas Par Value $0.01 Per Share 100

Documents incorporated by reference: specified portions of The Southern Company's Definitive Proxy Statement on Schedule 14A relating to the 20172020 Annual Meeting of Stockholders are incorporated by reference into PART III. In addition, specified portions of theAlabama Power Company's Definitive Information StatementsProxy Statement on Schedule 14C of Alabama Power Company, Georgia Power Company, and Mississippi Power Company14A relating to each of their respective 2017its 2020 Annual MeetingsMeeting of Shareholders are incorporated by reference into PART III.
Each of Georgia Power Company, Mississippi Power Company, Southern Power Company, and Southern Company Gas meets the conditions set forth in General Instructions I(1)(a) and (b) of Form 10-K and is therefore filing this Form 10-K with the reduced disclosure format specified in General Instructions I(2)(b), (c), and (d) of Form 10-K.
This combined Form 10-K is separately filed by The Southern Company, Alabama Power Company, Georgia Power Company, Gulf Power Company, Mississippi Power Company, Southern Power Company, and Southern Company Gas. Information contained herein relating to any individual companyregistrant is filed by such companyregistrant on its own behalf. Each companyregistrant makes no representation as to information relating to the other companies.registrants.



Table of ContentsIndex to Financial Statements


Table of Contents


  Page
  
 
 
 
 
 
 
 
 
 
 
 
  
  
 


i

Table of ContentsIndex to Financial Statements

DEFINITIONS

When used in Items 1 through 5 and Items 9A through 15,this Form 10-K, the following terms will have the meanings indicated.
TermMeaning
2013 ARPAlternate Rate Plan approved by the Georgia PSC in 2013 for Georgia Power for the years 2014 through 2016 and subsequently extended through 2019
2019 ARPAlternate Rate Plan approved by the Georgia PSC in 2019 for Georgia Power for the years 2020 through 2022
AFUDCAllowance for funds used during construction
Alabama PowerAlabama Power Company
AMEAAlabama Municipal Electric Authority
Amended and Restated Loan Guarantee AgreementLoan guarantee agreement entered into by Georgia Power with the DOE in 2014, as amended and restated on March 22, 2019, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4
AOCIAccumulated other comprehensive income
AROAsset retirement obligation
ASCAccounting Standards Codification
ASUAccounting Standards Update
Atlanta Gas LightAtlanta Gas Light Company, a wholly-owned subsidiary of Southern Company Gas
Atlantic Coast PipelineAtlantic Coast Pipeline, LLC, a joint venture to construct and operate a natural gas pipeline in which Southern Company Gas has a 5% ownership interest
BcfBillion cubic feet
BechtelBechtel Power Corporation, the primary contractor for the remaining construction activities for Plant Vogtle Units 3 and 4
Bechtel AgreementThe October 23, 2017 construction completion agreement between the Vogtle Owners and Bechtel
CCNCertificate of convenience and necessity
CCRCoal combustion residuals
CCR RuleDisposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in 2015
Chattanooga GasChattanooga Gas Company, a wholly-owned subsidiary of Southern Company Gas
Clean Air ActClean Air Act Amendments of 1990
CO2
Carbon dioxide
ContractorCODCommercial operation date
Contractor Settlement AgreementThe December 31, 2015 agreement between Westinghouse and its affiliate, WECTEC Global Project Services Inc. (formerly known as CB&I Stone & Webster, Inc.), formerly a subsidiarythe Vogtle Owners resolving disputes between the Vogtle Owners and the EPC Contractor under the Vogtle 3 and 4 Agreement
Cooperative EnergyElectric cooperative in Mississippi
CPCNCertificate of The Shaw Group Inc.public convenience and Chicago Bridge & Iron Company N.V.necessity
CPP
Clean Power Plan, the final action published by the EPA in 2015 that established guidelines for states to develop plans to meet EPA-mandated CO2 emission rates or emission reduction goals for existing electric generating units
CWIPConstruction work in progress
DaltonCity of Dalton, Georgia, an incorporated municipality in the State of Georgia, acting by and through its Board of Water, Light, and Sinking Fund Commissioners
Dalton PipelineA pipeline facility in Georgia in which Southern Company Gas has a 50% undivided ownership interest
DOEU.S. Department of Energy
DSGPDiamond State Generation Partners
Duke Energy FloridaDuke Energy Florida, LLC
ECO PlanMississippi Power's environmental compliance overview plan

ii

Table of ContentsIndex to Financial Statements
DEFINITIONS
(continued)


TermMeaning
Eligible Project CostsCertain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under the loan guarantee program established under Title XVII of the Energy Policy Act of 2005
EMCElectric membership corporation
EPAU.S. Environmental Protection Agency
EPC ContractorWestinghouse and its affiliate, WECTEC Global Project Services Inc.; the former engineering, procurement, and construction contractor for Plant Vogtle Units 3 and 4
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
FMPAFFBFlorida Municipal Power AgencyFederal Financing Bank
FitchFitch Ratings, Inc.
GAAPU.S. generally accepted accounting principles
Georgia PowerGeorgia Power Company
Georgia Power Tax Reform Settlement AgreementA settlement agreement between Georgia Power and the staff of the Georgia PSC regarding the retail rate impact of the Tax Reform Legislation, as approved by the Georgia PSC in April 2018
GHGGreenhouse gas
GRAMAtlanta Gas Light's Georgia Rate Adjustment Mechanism
Guarantee Settlement AgreementThe June 9, 2017 settlement agreement between the Vogtle Owners and Toshiba related to certain payment obligations of the EPC Contractor guaranteed by Toshiba
Gulf PowerGulf Power Company, until January 1, 2019 a wholly-owned subsidiary of Southern Company
Heating Degree DaysA measure of weather, calculated when the average daily temperatures are less than 65 degrees Fahrenheit
Heating SeasonThe period from November through March when Southern Company Gas' natural gas usage and operating revenues are generally higher
HLBVHypothetical liquidation at book value
IBEWInternational Brotherhood of Electrical Workers
IGCCIntegrated coal gasification combined cycle, the technology originally approved for Mississippi Power's Kemper County energy facility (Plant Ratcliffe)
IICIntercompany Interchange Contract
Illinois CommissionIllinois Commerce Commission
Internal Revenue CodeInternal Revenue Code of 1986, as amended
IPPIndependent Power Producerpower producer
IRPIntegrated Resource Planresource plan
Kemper IGCCIRSIGCC facility under construction by Mississippi Power in Kemper County, MississippiInternal Revenue Service
KUAITAACKissimmee UtilityInspections, Tests, Analyses, and Acceptance Criteria, standards established by the NRC
ITCInvestment tax credit
JEAJacksonville Electric Authority
KWKilowatt
KWHKilowatt-hour
LIBORLondon Interbank Offered Rate
LIFOLast-in, first-out
LNGLiquefied natural gas
LOCOMLower of weighted average cost or current market price
LTSALong-term service agreement
MarketersMarketers selling retail natural gas in Georgia and certificated by the Georgia PSC
MEAG PowerMunicipal Electric Authority of Georgia

iii

Table of ContentsIndex to Financial Statements
DEFINITIONS
(continued)


TermMeaning
MergerThe merger, effective July 1, 2016, of a wholly-owned, direct subsidiary of Southern Company with and into Southern Company Gas, with Southern Company Gas continuing as the surviving corporation
MGPManufactured gas plant
Mississippi PowerMississippi Power Company
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MPUSMississippi Public Utilities Staff
MRAMunicipal and Rural Associations
MWMegawatt
MWHMegawatt hour
natural gas distribution utilitiesSouthern Company Gas' seven natural gas distribution utilities (Nicor Gas, Atlanta Gas Light, Company, Virginia Natural Gas, Inc., Elizabethtown Gas, Florida City Gas, Chattanooga Gas, Company, and Elkton Gas)Gas through June 30, 2018) (Nicor Gas, Atlanta Gas Light, Virginia Natural Gas, and Chattanooga Gas after July 29, 2018)
NCCRGeorgia Power's Nuclear Construction Cost Recovery
NDRAlabama Power's Natural Disaster Reserve
NextEra EnergyNextEra Energy, Inc.
Nicor GasNorthern Illinois Gas Company, a wholly-owned subsidiary of Southern Company Gas
NOX
Nitrogen oxide
NRCU.S. Nuclear Regulatory Commission
NYMEXNew York Mercantile Exchange, Inc.
NYSENew York Stock Exchange
OCIOther comprehensive income
OPCOglethorpe Power Corporation (an Electric Membership Corporation)
OUCOTCOrlando UtilitiesOver-the-counter
PennEast PipelinePennEast Pipeline Company, LLC, a joint venture to construct and operate a natural gas pipeline in which Southern Company Gas has a 20% ownership interest
PEPMississippi Power's Performance Evaluation Plan
Pivotal Home SolutionsNicor Energy Services Company, until June 4, 2018 a wholly-owned subsidiary of Southern Company Gas, doing business as Pivotal Home Solutions
Pivotal LNGPivotal LNG, Inc., a wholly-owned subsidiary of Southern Company Gas
Pivotal Utility HoldingsPivotal Utility Holdings, Inc., until July 29, 2018 a wholly-owned subsidiary of Southern Company Gas, doing business as Elizabethtown Gas (until July 1, 2018), Elkton Gas (until July 1, 2018), and Florida City Gas (until July 29, 2018)
PowerSecurePowerSecure, Inc., a wholly-owned subsidiary of Southern Company
PowerSouthPowerSouth Energy Cooperative
PPAPower purchase agreements, as well as, for Southern Power, contracts for differences that provide the owner of a renewable facility a certain fixed price for the electricity sold to the grid
PRPPipeline Replacement Program, an Atlanta Gas Light infrastructure program through 2013
PSCPublic Service Commission
PATH ActPTCProtecting Americans from Tax Hikes ActProduction tax credit
Rate CNPAlabama Power's Rate Certificated New Plant, Vogtle Units 3consisting of Rate CNP New Plant, Rate CNP Compliance, and 4Rate CNP PPA
Rate ECRTwo new nuclear generating units under construction at GeorgiaAlabama Power's Plant VogtleRate Energy Cost Recovery
Rate NDRAlabama Power's Rate Natural Disaster Reserve
Rate RSEAlabama Power's Rate Stabilization and Equalization


ii
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Table of ContentsIndex to Financial Statements

DEFINITIONS
(continued)



TermMeaning
RegistrantsSouthern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas
ROEReturn on equity
RUSRural Utilities Service
S&PS&P Global Ratings, a division of S&P Global Inc.
SCSSouthern Company Services, Inc. (the Southern Company system service company and a wholly-owned subsidiary of Southern Company)
SECU.S. Securities and Exchange Commission
SEGCOSouthern Electric Generating Company, 50% owned by each of Alabama Power and Georgia Power
SEPASoutheastern Power Administration
SequentSequent Energy Management, L.P., a wholly-owned subsidiary of Southern Company Gas
SERCSoutheastern Electric Reliability Corporation
SNGSouthern Natural Gas Company, L.L.C., a pipeline system in which Southern Company Gas has a 50% ownership interest
SO2
Sulfur dioxide
Southern CompanyThe Southern Company
Southern Company GasSouthern Company Gas and its subsidiaries
Southern Company Gas CapitalSouthern Company Gas Capital Corporation, a 100%-owned subsidiary of Southern Company Gas
Southern Company Gas DispositionsSouthern Company Gas' disposition of Pivotal Home Solutions, Pivotal Utility Holdings' disposition of Elizabethtown Gas and Elkton Gas, and NUI Corporation's disposition of Pivotal Utility Holdings, which primarily consisted of Florida City Gas
Southern Company power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PowerSecurePowerSecure Inc.
PowerSouthPowerSouth Energy Cooperative
PPAPower purchase agreements and contracts for differences that provide the owner of a renewable facility a certain fixed price for the electricity sold to the grid
PSCPublic Service Commission
registrantsSouthern Company, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and Southern Company Gas
RUSRural Utilities Service
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECSecurities and Exchange Commission
SEGCOSouthern Electric Generating Company
SEPASoutheastern Power Administration
SERCSoutheastern Electric Reliability Council
SMEPASouth Mississippi Electric Power Association (now known as Cooperative Energy)
Southern CompanyThe Southern Company
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiaries
Southern Company Gas CapitalSouthern Company Gas Capital Corporation (formerly known as AGL Capital Corporation), a 100%-owned subsidiary of Southern Company Gas
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, (as of July 1, 2016), SEGCO, Southern Nuclear, SCS, Southern LINC,Linc, PowerSecure, (as of May 9, 2016), and other subsidiaries
Southern HoldingsSouthern Company Holdings, Inc., a wholly-owned subsidiary of Southern Company
Southern LINCLincSouthern Communications Services, Inc., a wholly-owned subsidiary of Southern Company, doing business as Southern Linc
Southern NuclearSouthern Nuclear Operating Company, Inc., a wholly-owned subsidiary of Southern Company
Southern PowerSouthern Power Company and its subsidiaries
SouthStarSouthStar Energy Services, LLC, a wholly-owned subsidiary of Southern Company Gas
SP SolarSP Solar Holdings I, LP, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, in which Southern Power has a 67% ownership interest
SP WindSP Wind Holdings II, LLC, a holding company owning a portfolio of eight operating wind facilities, in which Southern Power is the controlling partner in a tax equity arrangement
SRRMississippi Power's System Restoration Rider, a tariff for retail property damage reserve
Subsidiary RegistrantsAlabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas
Tax Reform LegislationThe Tax Cuts and Jobs Act, which became effective on January 1, 2018
ToshibaToshiba Corporation, the parent company of Westinghouse
Toshiba GuaranteeCertain payment obligations of the EPC Contractor guaranteed by Toshiba
traditional electric operating companiesAlabama Power, Georgia Power, Gulf Power, and Mississippi Power through December 31, 2018; Alabama Power, Georgia Power, and Mississippi Power as of January 1, 2019
TritonTriton Container Investments, LLC, an investment of Southern Company Gas through May 29, 2019
VCMVogtle Construction Monitoring

v

Table of ContentsIndex to Financial Statements
DEFINITIONS
(continued)


TermMeaning
VIEVariable interest entity
Virginia CommissionVirginia State Corporation Commission
Virginia Natural GasVirginia Natural Gas, Inc., a wholly-owned subsidiary of Southern Company Gas
Vogtle 3 and 4 AgreementAgreement entered into with the EPC Contractor in 2008 by Georgia Power, acting for itself and as agent for the Vogtle Owners, and rejected in bankruptcy in July 2017, pursuant to which the EPC Contractor agreed to design, engineer, procure, construct, and test Plant Vogtle Units 3 and 4
Vogtle OwnersGeorgia Power, OPC,Oglethorpe Power Corporation, MEAG Power, and Dalton
Vogtle Services AgreementThe June 2017 services agreement between the Vogtle Owners and the EPC Contractor, as amended and restated in July 2017, for the EPC Contractor to transition construction management of Plant Vogtle Units 3 and 4 to Southern Nuclear and to provide ongoing design, engineering, and procurement services to Southern Nuclear
WACOGWeighted average cost of gas
WestinghouseWestinghouse Electric Company LLC
XcelXcel Energy Inc.


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Table of ContentsIndex to Financial Statements


CAUTIONARY STATEMENT REGARDING
FORWARD-LOOKING INFORMATION
This Annual Report on Form 10-K contains forward-looking statements. Forward-looking statements include, among other things, statements concerning regulated rates, the strategic goals for the wholesale business, customer and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, projected equity ratios, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plans, postretirement benefit plans, and nuclear decommissioning trust fund contributions, financing activities, completion dates and costs of construction projects, matters related to the abandonment of the Kemper IGCC, completion of announced acquisitions and dispositions, filings with state and federal regulatory authorities, impact of the PATH Act, federal and state income tax benefits, estimated sales and purchases under power sale and purchase agreements, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "would," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:

the impact of recent and future federal and state regulatory changes, including tax, environmental, laws regulating emissions, discharges, and disposal to air, water, and land, and also changes in tax and other laws and regulations to which Southern Company and its subsidiaries are subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
the extent and timing of costs and legal requirements related to CCR;
current and future litigation or regulatory investigations, proceedings, or inquiries;inquiries, including litigation and other disputes related to the Kemper County energy facility;
the effects, extent, and timing of the entry of additional competition in the markets in which Southern Company's subsidiaries operate;
variations in demand for electricity and natural gas, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures,operate, including from the development and deployment of alternative energy sources such as self-generationsources;
variations in demand for electricity and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;natural gas;
available sources and costs of natural gas and other fuels;
the ability to complete necessary or desirable pipeline expansion or infrastructure projects, limits on pipeline capacity;capacity, and operational interruptions to natural gas distribution and transmission activities;
transmission constraints;
effects of inflation;
the ability to control costs and avoid cost and schedule overruns during the development, construction, and operation of facilities or other projects, including Plant Vogtle Units 3 and 4, which includeincludes components based on new technology that only within the developmentlast few years began initial operation in the global nuclear industry at this scale, and construction of generating facilities with designs that have not been finalized or previously constructed, including changes in labor costs, availability, and productivity,productivity; challenges with management of contractors or vendors; subcontractor performance; adverse weather conditions,conditions; shortages, anddelays, increased costs, or inconsistent quality of equipment, materials, and labor, sustaining nitrogen supply,labor; contractor or supplier delay, non-performancedelay; delays due to judicial or regulatory action; nonperformance under construction, operating, or other agreements,agreements; operational readiness, including specialized operator training and required site safety programs, unforeseenprograms; engineering or design problems,problems; design and other licensing-based compliance matters, including, for nuclear units, the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel; challenges with start-up activities, (includingincluding major equipment failure, and system integration),integration, or regional transmission upgrades; and/or operational performance (including additional costsperformance;
the ability to overcome or mitigate the current challenges at Plant Vogtle Units 3 and 4, as described in Note 2 to the financial statements under "Georgia Power – Nuclear Construction" in Item 8 herein, that could impact the cost and schedule for the project;
legal proceedings and regulatory approvals and actions related to satisfyconstruction projects, such as Plant Vogtle Units 3 and 4 and pipeline projects, including PSC approvals and FERC and NRC actions;
under certain specified circumstances, a decision by holders of more than 10% of the ownership interests of Plant Vogtle Units 3 and 4 not to proceed with construction and the ability of other Vogtle Owners to tender a portion of their ownership interests to Georgia Power following certain construction cost increases;
in the event Georgia Power becomes obligated to provide funding to MEAG Power with respect to the portion of MEAG Power's ownership interest in Plant Vogtle Units 3 and 4 involving JEA, any operational parameters ultimately adopted by any PSC);inability of Georgia Power to receive repayment of such funding;

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION
(continued)
the ability to construct facilities in accordance with the requirements of permits and licenses (including satisfaction of NRC requirements), to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completion of construction;
investment performance of the Southern Company system's employee and retiree benefit plans and nuclear decommissioning trust funds;
advances in technology;
performance of counterparties under ongoing renewable energy partnerships and development agreements;
state and federal rate regulations and the impact of pending and future rate cases and negotiations, including rate actions relating to ROE, equity ratios, additional generating capacity, and fuel and other cost recovery mechanisms;
legal proceedings and regulatory approvals and actions related to Plant Vogtle Units 3 and 4, including Georgia PSC approvals and NRC actions;
actions related to cost recovery for the Kemper IGCC, including the ultimate impact of the 2015 decision of the Mississippi Supreme Court, the Mississippi PSC's December 2015 rate order, and related legal or regulatory proceedings, Mississippi

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PSC review of the prudence of Kemper IGCC costs and approval of further permanent rate recovery plans, actions relating to proposed securitization, satisfaction of requirements to utilize grants, and the ultimate impact of the termination of the proposed sale of an interest in the Kemper IGCC to SMEPA;
the ability to successfully operate the electric utilities' generating, transmission, and distribution facilities and Southern Company Gas' natural gas distribution and storage facilities and the successful performance of necessary corporate functions;
the inherent risks involved in operating and constructing nuclear generating facilities, including environmental, health, regulatory, natural disaster, terrorism, and financial risks;facilities;
the inherent risks involved in transporting and storing natural gas;
the performance of projects undertaken by the non-utility businesses and the success of efforts to invest in and develop new opportunities;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, including the pending disposition by Southern Company Gas of its interests in Pivotal LNG and Atlantic Coast Pipeline, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries;
the possibility that the anticipated benefits from the Merger cannot be fully realized or may take longer to realize than expected, the possibility that costs related to the integration of Southern Company and Southern Company Gas will be greater than expected, the ability to retain and hire key personnel and maintain relationships with customers, suppliers, or other business partners, and the diversion of management time on integration-related issues;
the ability of counterparties of Southern Company and its subsidiaries to make payments as and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Southern Company system's business resulting from cyber intrusion or terrorist incidentsphysical attack and the threat of terrorist incidents;physical attacks;
interest rate fluctuations and financial market conditions and the results of financing efforts;
access to capital markets and other financing sources;
changes in Southern Company's and any of its subsidiaries' credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;ratings;
changes in the impactsmethod of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, anddetermining LIBOR or the economy in general, as well as potential impacts on the benefitsreplacement of the DOE loan guarantees;LIBOR with an alternative reference rate;
the ability of Southern Company's electric utilities to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, such as influenzas, or other similar occurrences;
the direct or indirect effects on the Southern Company system's business resulting from incidents affecting the U.S. electric grid, natural gas pipeline infrastructure, or operation of generating or storage resources;
impairments of goodwill or long-lived assets;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports filed by the registrantsRegistrants from time to time with the SEC.
The registrantsRegistrants expressly disclaim any obligation to update any forward-looking statements.


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PART I
Item 1.BUSINESS
Southern Company was incorporated under the laws of Delaware on November 9, 1945. Southern Company is registered and qualified to do business under the laws of Georgia and is qualified to do business as a foreign corporation under the laws of Alabama. Southern Company owns all of the outstanding common stock of Alabama Power, Georgia Power, Gulf Power, and Mississippi Power, each of which is an operating public utility company. TheThese traditional electric operating companies supply electric service in the states of Alabama, Georgia, Florida, and Mississippi. More particular information relating to each of the traditional electric operating companies is as follows:
Alabama Power is a corporation organized under the laws of the State of Alabama on November 10, 1927, by the consolidation of a predecessor Alabama Power Company, Gulf Electric Company, and Houston Power Company. The predecessor Alabama Power Company had been in continuous existence since its incorporation in 1906.
Georgia Power was incorporated under the laws of the State of Georgia on June 26, 1930 and was admitted to do business in Alabama on September 15, 1948 and in Florida on October 13, 1997.1930.
Gulf Power is a Florida corporation that has had a continuous existence since it was originally organized under the laws of the State of Maine on November 2, 1925. Gulf Power was admitted to do business in Florida on January 15, 1926, in Mississippi on October 25, 1976, and in Georgia on November 20, 1984. Gulf Power became a Florida corporation after being domesticated under the laws of the State of Florida on November 2, 2005.
Mississippi Power was incorporated under the laws of the State of Mississippi on July 12, 1972, was admitted to do business in Alabama on November 28, 1972 and effective December 21, 1972, by the merger into it of the predecessor Mississippi Power Company, succeeded to the business and properties of the latter company. The predecessor Mississippi Power Company was incorporated under the laws of the State of Maine on November 24, 1924 and was admitted1924.
On January 1, 2019, Southern Company completed its sale of Gulf Power to do businessNextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed). Gulf Power is an electric utility serving retail customers in Mississippi on December 23, 1924 andthe northwestern portion of Florida. See Note 15 to the financial statements under "Southern Company" in Alabama on December 7, 1962.Item 8 herein for additional information.
In addition, Southern Company owns all of the common stock of Southern Power Company, which is also an operating public utility company. The term "Southern Power" when used herein refers to Southern Power Company and its subsidiaries, while the term "Southern Power Company" when used herein refers only to the Southern Power parent company. Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power Company is a corporation organized under the laws of Delaware on January 8, 2001. See "The term "Southern Power" when used herein refers to Southern Company SystemSouthern Power Company" herein and its subsidiaries while the term "Southern Power Company" when used herein refers onlyNote 15 to the parent company.financial statements in Item 8 herein for additional information, including Southern Power's recent acquisitions and dispositions.
On July 1, 2016, Southern Company completedacquired all of the Merger for a total purchase pricecommon stock of approximately $8.0 billion and Southern Company Gas became a wholly-owned, direct subsidiary of Southern Company.in July 2016. Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas in sevenfour states - Illinois, Georgia, Virginia, New Jersey, Florida,and Tennessee and Maryland - through the natural gas distribution utilities. Southern Company Gas is also involved in several other businesses that are complementary to the distribution of natural gas. Southern Company Gas was incorporated under the laws of the State of Georgia on November 27, 1995 for the primary purpose of becoming the holding company for Atlanta Gas Light, Company, which was founded in 1856. See "The Southern Company SystemSouthern Company Gas" herein and Note 15 to the financial statements in Item 8 herein for additional information, including Southern Company Gas' recent and pending dispositions.
Southern Company also owns all of the outstanding common stock or membership interests of SCS, Southern LINC,Linc, Southern Holdings, Southern Nuclear, PowerSecure, and other direct and indirect subsidiaries. SCS, the system service company, has contracted with Southern Company, each traditional electric operating company, Southern Power, Southern Company Gas, Southern Nuclear, SEGCO, and other subsidiaries to furnish, at direct or allocated cost and upon request, the following services: general executive and advisory, general and design engineering, operations, purchasing, accounting, finance, and treasury, legal, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communication,communications, cellular tower space, and other services with respect to business and operations, construction management, and Southern Company power pool transactions. Southern LINCLinc provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cableoptics services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leaseslease and for other electric services.investments. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants and is currently managing construction of and developing Plant Vogtle Units 3 and 4, which are co-owned by Georgia Power. PowerSecure is a provider of productsprovides energy solutions to electric utilities and servicestheir customers in the areas of distributed generation, energy efficiency,storage and utility infrastructure.renewables, and energy efficiency.
Alabama PowerSegment information for Southern Company and Georgia Power each own 50% of the outstanding common stock of SEGCO. SEGCO is an operating public utility company that owns electric generating units with an aggregate capacity of 1,020 MWs at Plant Gaston on the Coosa River near Wilsonville, Alabama. Alabama Power and Georgia Power are each entitled to one-half of SEGCO's capacity and energy. Alabama Power acts as SEGCO's agent in the operation of SEGCO's units and furnishes fuel to SEGCO for its units. SEGCO also owns one 230,000 volt transmission line extending from Plant Gaston to the Georgia state line at which

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point connection is made with the Georgia Power transmission line system. SEGCO added natural gas as a fuel source for 1,000 MWs of its generating capacity in 2015. In April 2016, natural gas became the primary fuel source. Alabama Power, which owns and operates a generating unit adjacent to the SEGCO generating units, has entered into a joint ownership agreement with SEGCO for the ownership of an associated gas pipeline. Alabama Power owns 14% of the pipeline with the remaining 86% owned by SEGCO.
Southern Company's segment informationCompany Gas is included in Note 1316 to the financial statements of Southern Company in Item 8 herein. Southern Company Gas' segment information is included in Note 12 to the financial statements of Southern Company Gas in Item 8 herein.
The registrants'Registrants' Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and allany amendments to those reports are made available on Southern Company's website, free of charge, as soon as reasonably
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practicable after such material is electronically filed with or furnished to the SEC. Southern Company's internet address is www.southerncompany.com.
The Southern Company System
Traditional Electric Operating Companies
The traditional electric operating companies are vertically integrated utilities that own generation, transmission, and distribution facilities. See PROPERTIES in Item 2 herein for additional information on the traditional electric operating companies' generating facilities. Each company's transmission facilities are connected to the respective company's own generating plants and other sources of power (including certain generating plants owned by Southern Power) and are interconnected with the transmission facilities of the other traditional electric operating companies and SEGCO. For information on the State of Georgia's integrated transmission system, see "Territory"Territory Served by the Southern Company SystemTraditional Electric Operating Companies and Southern Power"Power" herein.
Agreements in effect with principal neighboring utility systems provide for capacity and energy transactions that may be entered into from time to time for reasons related to reliability or economics. Additionally, the traditional electric operating companies have entered into voluntaryvarious reliability agreements with the subsidiaries of Entergy Corporation, Florida Electric Power Coordinating Group, and Tennessee Valley Authority and with Duke Energy Progress, LLC, Duke Energy Carolinas, LLC, South Carolina Electric & Gas Company, and Virginia Electric and Power Company,certain neighboring utilities, each of which provides for the establishment and periodic review of principles and procedures for planning and operation of generation and transmission facilities, maintenance schedules, load retention programs, emergency operations, and other matters affecting the reliability of bulk power supply. The traditional electric operating companies have joined with other utilities in the Southeast (including some of those referred to above) to form the SERC to augment further the reliability and adequacy of bulk power supply. Through the SERC, the traditional electric operating companies are represented onat the NationalNorth American Electric Reliability Council.Corporation.
The utility assets of the traditional electric operating companies and certain utility assets of Southern Power Company are operated as a single integrated electric system, or Southern Company power pool, pursuant to the IIC. Activities under the IIC are administered by SCS, which acts as agent for the traditional electric operating companies and Southern Power Company. The fundamental purpose of the Southern Company power pool is to provide for the coordinated operation of the electric facilities in an effort to achieve the maximum possible economies consistent with the highest practicable reliability of service. Subject to service requirements and other operating limitations, system resources are committed and controlled through the application of centralized economic dispatch. Under the IIC, each traditional electric operating company and Southern Power Company retains its lowest cost energy resources for the benefit of its own customers and delivers any excess energy to the Southern Company power pool for use in serving customers of other traditional electric operating companies or Southern Power Company or for sale by the Southern Company power pool to third parties. The IIC provides for the recovery of specified costs associated with the affiliated operations thereunder, as well as the proportionate sharing of costs and revenues resulting from Southern Company power pool transactions with third parties. In connection with the sale of Gulf Power, an appendix was added to the IIC setting forth terms and conditions governing Gulf Power's continued participation in the IIC for a defined transition period that, subject to certain potential adjustments, is scheduled to end on January 1, 2024.
Southern Power and Southern LINCLinc have secured from the traditional electric operating companies certain services which are furnished at cost in compliance with FERC regulations.
Alabama Power and Georgia Power each have a contractagreements with Southern Nuclear to operate the Southern Company system's existing nuclear plants, Plants Farley, Hatch, and Vogtle. In addition, Georgia Power has a contractan agreement with Southern Nuclear to develop, license, construct, and operate Plant Vogtle Units 3 and 4. See "Regulation"RegulationNuclear Regulation"Regulation" herein for additional information.

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Southern Power
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates (under authority from the FERC) in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of assets,partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load serving entities.load-serving entities, as well as commercial and industrial customers. Southern Power's business activities are not subject to traditional state regulation like the traditional electric operating companies, but the majority of its business activities are subject to regulation by the FERC. Southern Power has attempted to insulate itself from significant fuel supply, fuel transportation, and electric transmission risks by generally making such risks the responsibility of the counterparties to its PPAs. However, Southern Power's future earnings will depend on the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as Southern Power's ability to execute its growth strategy and to develop and construct generating facilities. For additional information on
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Southern Power's business activities, see MANAGEMENT'S DISCUSSION AND ANALYSIS – OVERVIEW – "Business Activities" of Southern Power"Business Activities" in Item 7 herein.
Southern Power Company directly owns and manages generation assets primarily in the Southeast, which are included in the Southern Company power pool, and has other wholly-ownedvarious subsidiaries, two of which are Southern Renewable Energy, Inc. (SRE) and Southern Renewable Partnerships, LLC (SRP), which were created to own and operate natural gas and renewable generation facilities either wholly or in partnership with various third parties, including Turner Renewable Energy, LLC (TRE), First Solar Inc., Recurrent Energy,parties. At December 31, 2019, Southern Power's generation fleet, which is owned in part with various partners, totaled 11,527 MWs of nameplate capacity in commercial operation (including 4,147 MWs of nameplate capacity owned by its subsidiaries and excluding Plant Mankato, which was sold to a subsidiary of Canadian Solar Inc., or SunPower Corp. The generation assets of these subsidiaries are not included in the power pool.Xcel on January 17, 2020). In addition, Southern Power Company has other subsidiaries either with natural gas and biomass generating facilities orthat are pursuing additional natural gas generation and other renewable generation development opportunities. The generation assets of Southern Power subsidiaries are not included in the Southern Company power pool. See "Traditional Electric Operating Companies" herein for additional information on the Southern Company power pool.
SomeDuring 2019, Southern Power completed the sale of SRP'sits equity interests in a 115-MW biomass facility located in Nacogdoches County, Texas to Austin Energy.
A majority of Southern Power's partnerships in renewable facilities allow for the sharing of cash distributions and tax benefits at differing percentages. SRP ispercentages, with Southern Power being the controlling member and thus consolidating the assets and operations of the partnerships. At December 31, 2019, Southern Power has four tax-equity partnership arrangements where the tax-equity investors receive substantially all of the tax benefits from the facilities, including ITCs and PTCs. In addition, Southern Power holds controlling interests in eight partnerships in solar facilities through SP Solar. For seven of these solar partnerships, Southern Power and its 33% partner, Global Atlantic, are entitled to 51% of all cash distributions from eight of the partnership entities and the respective partner whothat holds the classClass B membership interests is entitled to 49% of all cash distributions. For the Desert Stateline partnership, SRP isSouthern Power and Global Atlantic are entitled to 66% of all cash distributions and the classClass B member is entitled to 34% of all cash distributions. In addition, Southern Power isand Global Atlantic are entitled to substantially all of the federal tax benefits with respect to these nineeight partnership entities.
During 2016, Finally, for the Roserock partnership, Southern Power acquired or commenced constructionis entitled to 51% of approximately 2,134 MWs of additional solar, wind,all cash distributions and natural gas facilities and completed construction of approximately 1,060 MWs of solar facilities. The aggregate purchase price for projects acquired by Southern Power's subsidiaries during 2016 and 2015 was $2.3 billion and $1.4 billion, respectively. During 2016, Southern Power's subsidiaries completed construction of and placed in service projects with a total construction cost of approximately $3.2 billion.
In December 2016, as part of Southern Power's renewable development strategy, SRP entered into a joint development agreement with Renewable Energy Systems Americas, Inc. (RES) to develop and construct approximately 3,000 MWs across 10 wind projects expected to be placed in service between 2018 and 2020. Also in December 2016, Southern Power signed agreements and made payments to purchase wind turbine equipment from Siemens Wind Projects, Inc. and Vestas-American Wind Technology, Inc. to be used for constructionsubstantially all of the facilities. Once these wind projects reach commercial operation, they are expectedfederal tax benefits, with the Class B member entitled to qualify for 100% production tax credits (PTCs).49% of all cash distributions.
The ultimate outcome of these matters cannot be determined at this time. For additional information on SRE and SRP, see MANAGEMENT'S DISCUSSION AND ANALYSIS – "Acquisitions" and "Construction Projects" of Southern PowerSee PROPERTIES in Item 7 herein.
See Item 2 – Properties,herein and Note 215 to the financial statements of under "Southern Power in Item 8 herein, and Note 12 to the financial statements of Southern Company under "Southern Power"" in Item 8 herein for additional information regarding Southern Power's acquisitions, dispositions, construction, and development projects.
As of December 31, 2016, Southern Power owned generating units totaling 11,768 MWs of nameplate capacity in commercial operation, after taking into consideration its equity ownership percentage of the solar and wind facilities. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction or being acquired)construction) as the investment amount. With the inclusion of the PPAs and investmentinvestments associated with the solar and natural-gas firedwind facilities currently under construction, and Bethel Wind, which was acquired subsequent to December 31, 2016, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power has anPower's average investment coverage ratio of 91%at December 31, 2019 was 93% through 20212024 and 90% through 2026,2029, with an average remaining contract duration of approximately 1614 years.
Southern Power's electricity sales from natural gas and biomass salesgenerating facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated plant unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block

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sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serveserves the customer's capacity and energy requirements from a combination of the customer's own generating units and from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable. Capacity charges that form part of the PPA payments are designed to recover fixed and variable operations and maintenance costs based on dollars-per-kilowatt year and to provide a return on investment.
Southern Power's electricity sales from solar and wind (renewable) generating facilities are predominantlyalso primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
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The following tables set forth Southern Power's PPAs as of December 31, 2016:2019:
Natural Gas Block Sales PPAs
Facility/Source Counterparty 
MWs(1)


   Contract Term
Addison UnitUnits 1MEAG Power152
through April 2029
Addison Units 2 and 43 Georgia Power 293297

   through May 2030
Addison Unit 32MEAG Power149
through April 2029
Addison Unit 4 Georgia Energy Cooperative 151146

   through May 2030
Cleveland County Unit 1 North Carolina Electric Membership CorporationEMC (NCEMC) 45-180180

   through Dec. 2036
Cleveland County Unit 2 NCEMC 180183

   through Dec. 2036
Cleveland County Unit 3 North Carolina Municipal Power Agency 1 183

   through Dec. 2031
Dahlberg Units 1, 3, and 5 Cobb EMC 224

   through Dec. 20262027
Dahlberg Units 2, 6, 8, and 10 Georgia Power 298

   through May 2025
Dahlberg Units 7 and 9
Eleven EMCs in Georgia(2)
65-132
Jan. 2025 - Dec 2034
Dahlberg Unit 4 Georgia Power 7374

   through May 2030
Franklin Unit 1 Duke Energy Florida 434

   through May 2021
Franklin Unit 1Century Aluminum16
through Dec. 2020
Franklin Unit 2 Morgan Stanley Capital Group 250

   through Dec. 2025
Franklin Unit 2 Jackson EMC 60-65

   through Dec. 2035
Franklin Unit 2 GreyStone Power Corporation 35-4035

   through Dec. 2035
Franklin Unit 2 Cobb EMC 100

   through Dec. 20262027
Franklin Unit 3 Morgan Stanley Capital Group 200200-300

through Dec. 2033
Franklin Unit 3Dalton70
   through Dec. 2027
Harris Unit 1 
Georgia Power(3)
 628640

   through May 2030
Harris Unit 2 Georgia Power
AMEA(4)
 64925

   through May 2019Dec. 2025
Harris Unit 2 Alabama Municipal Electric Authority(1)PowerSouth Energy Cooperative 25200

   Jan.June 2020 – Dec. 2025Feb. 2023
Mankato(5)
 Northern States Power Company 375

   through June 2026Jan 2020
Mankato(5)
 Northern States Power Company 345
June 2019 – May 2039(2)
NacogdochesCity of Austin, Texas100

   through May 2032Jan 2020
NCEMC PPA(3)PPA(6)
 EnergyUnited 100

   through Dec. 2021
Oleander Units 2, 3, and 4Seminole Electric Cooperative465
through May 2021
Oleander Unit 5FMPA157
through Dec. 2027
Rowan CT Unit 1 North Carolina Municipal Power Agency 1 150

   through Dec. 2030
Rowan CT Units 2 and 3 EnergyUnited 100-175100

   Jan. 2022 – Dec. 20252023
Rowan CT Unit 3 EnergyUnited 113

   through Dec. 2023
Rowan CC Unit 4 EnergyUnited 9-32867-239

   through Dec. 2025
Block Sales PPAs (continued)
Facility/SourceCounterparty
MWs(1)

Contract Term
Rowan CC Unit 4Macquarie150
through Nov. 2020
Rowan CC Unit 4 Duke Energy Progress, LLC 150228-415

Jan. 2020 – Dec. 2025
Wansley Unit 6Dalton30
Jan. 2020 – Dec. 2020
Wansley Unit 6Century Aluminum158
   through Dec. 2019
Rowan CC Unit 4(4)Century Aluminum154
through Dec. 2017
Stanton Unit AOUC341
through Sept. 2033
Stanton Unit AFMPA85
through Sept. 20332020
Wansley Unit 6 
Eleven EMCs in Georgia Power(2)
 570133-375

   through May 2017Jan. 2025 - Dec. 2034

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(1)Alabama Municipal Electric Authority will also be served by Plant Franklin Unit 1 from January 2018 through December 2019.The MWs and related facility units may change due to unit rating changes or assignment of units to contracts.
(2)SubjectPPA block sales to commercial operation of the expansion project.current requirement services PPA counterparties.
(3)Georgia Power will be served by Plant Harris Unit 2 through May 2020.
(4)AMEA will be served by Plant Franklin Unit 1 through May 2020.
(5)
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" in Item 8 herein for additional information.
(6)Represents sale of power purchased from NCEMC under a PPA.
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Natural Gas Requirements Services PPAs
Counterparty
MWs(1)
Contract Term
Nine EMCs in Georgia292-330through Dec. 2024
Sawnee EMC267-549through Dec. 2027
Cobb EMC0-61through Dec. 2027
Flint EMC138-158through Dec. 2024
Dalton45-73through Dec. 2027
EnergyUnited75-280through Dec. 2025
City of Blountstown, Florida10through April 2022
(4)(1)Century Aluminum PPA is partially served by Plant Franklin Unit 3.Represents forecasted incremental capacity needs over the contract term.
Requirements ServicesFuel Cell PPAs
Facility/SourceCounterparty 
MWs(1)


   Contract Term
Nine Georgia EMCsRed Lion and Brookside (DSGP) 281-370
Delmarva Power & Light
 (1)28through Dec. 2024
Sawnee EMC267-609
(1)through Dec. 2027
Cobb EMC0-160
(1)through Dec. 2026
Flint EMC132-316
(1)through Dec. 2024
City of Dalton, Georgia60

   through Dec. 20172034
(1) MWs shown are for 100% of the PPA, which is based on demonstrated capacity of the facility.
Battery Storage PPAs
EnergyUnited
Facility/Source 55-152
Counterparty
 
MWs(1)

 through Dec. 2025
City of Blountstown, Florida 10Contract Term
Milliken
Southern California Edison Company2
   through April 2022Dec. 2026

(1)Represents a range of forecasted incremental capacity needs over the contract term.
(1) MWs shown are for 100% of the PPA, which is based on demonstrated capacity of the facility.
Solar/Wind PPAs
FacilityCounterpartyMWs(1)
MWs(1)


Contract Term
Solar(2)
   
Adobe(2)AdobeSouthern California Edison Company20

through MayJune 2034
Apex(2)ApexNevada Power Company20

through Dec. 2037
Boulder 1(3)1Nevada Power Company100

through Dec. 2036
ButlerGeorgia Power100

through Dec. 2046
Butler Solar FarmGeorgia Power20

through Feb. 2036
Calipatria(2)CalipatriaSan Diego Gas & Electric Company20

through Feb. 2036
Campo Verde(2)VerdeSan Diego Gas & Electric Company139

through Sept.Oct. 2033
Cimarron(2)CimarronTri-State Generation and Transmission Association, Inc.30

through Nov.Dec. 2035
Decatur CountyGeorgia Power19

through Dec. 2035
Decatur ParkwayGeorgia Power80

through Dec. 2040
Desert Stateline(4)StatelineSouthern California Edison Company300

through Aug.Sept. 2036
East PecosAustin Energy119

March 2017 – Feb.through April 2032 (6)
Garland A(3)ASouthern California Edison Company20

through Sept. 2036
Garland(3)GarlandSouthern California Edison Company180

through Oct. 2031
Granville(2)Gaskell West 1Southern California Edison Company20
through March 2038
GranvilleDuke Energy Progress, LLC23

through Nov.Oct. 2032
Henrietta(3)Henrietta
Pacific Gas & Electric Company(3)
100

through Sept. 2036
Imperial Valley(3)ValleySan Diego Gas & Electric Company150

through Nov. 2039
LamesaCity of Garland, Texas102

through April 2017 – March 2032 (6)
Lost Hills Blackwell(3)BlackwellCity of Roseville &
99% to Pacific Gas & Electric Company(3) and 1% to City of Roseville, California
32

through Dec. 2043
Macho Springs(2)SpringsEl Paso EnergyElectric Company50

through May 2034
Morelos(2)Morelos
Pacific Gas & Electric Company(3)
15

through Feb. 2036
North Star(3)Pacific Gas & Electric Company60
through June 2035
PawpawGeorgia Power30
through March 2046
Roserock(3)Austin Energy157
through Nov. 2036
Rutherford(2)Duke Energy Carolinas, LLC75
through Dec. 2031

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Solar/Wind PPAs (continued)
FacilityCounterpartyMWs(1)
MWs(1)


Contract Term
Solar(2)
North Star
Pacific Gas & Electric Company(3)
60
through June 2035
PawpawGeorgia Power30
through March 2046
RoserockAustin Energy157
through Nov. 2036
RutherfordDuke Energy Carolinas, LLC75
through Dec. 2031
SandhillsCobb EMC111

through Oct. 2041
SandhillsFlint EMC15

through Oct. 2041
SandhillsSawnee EMC15

through Oct. 2041
SandhillsMiddle Georgia and Irwin EMC2

through Oct. 2041
Spectrum(2)SpectrumNevada Power Company30

through Dec. 2038
Tranquillity(3)Shell Energy North America (US), LP204
through Nov. 2019
Tranquillity(3)TranquillitySouthern California Edison Company204

Dec. 2019 –through Nov. 2034
Wind(4)
   
BethelGoogle Inc.225
through Jan. 2029
Cactus FlatsGeneral Mills, Inc.98
through July 2033
Cactus FlatsGeneral Motors Company50
through July 2030
Grant PlainsOklahoma Municipal Power Authority41

Jan. 2020 –through Dec. 2039
Grant PlainsSteelcase Inc.25

through Dec. 2028
Grant PlainsAllianz Risk Transfer (Bermuda) Ltd.81-122

April 2017 –through March 2027
Grant WindEast Texas Electric Cooperative50

through MarchApril 2036
Grant WindNortheast Texas Electric Cooperative50

through MarchApril 2036
Grant WindWestern Farmers Electric Cooperative50

through MarchApril 2036
Kay WindWestar Energy Inc.199200

through Sept. 2036Dec. 2035
Kay WindGrand River Dam Authority10099

through Dec. 2035
PassadumkeagWestern Massachusetts Electric Company40

through June 2031
Reading(5)
Royal Caribbean Cruises Ltd.200
April 2020 – March 2032
Salt Fork WindCity of Garland, Texas150

through Nov. 2030
Salt Fork WindSalesforce.com, Inc.24

through Nov. 2028
Skookumchuck(5)
Puget Sound Energy, Inc.136
second quarter 2020 – 2039
Tyler Bluff WindThe Proctor & Gamble Company96

through Dec. 2028
Wake Wind(5)WindEquinix Enterprises, Inc.100

through Oct. 2028
Wake Wind(5)WindOwens Corning125

through Oct. 2028
Wildhorse MountainArkansas Electric Cooperative Corporation100
through Sept. 2039

(1) MWs shown are for 100% of the PPA, which is based on demonstrated capacity of the facility.
(2) Southern Power's subsidiary'sPower owns a 67% equity interest in these facilities is 90%.
(3)SP Solar (a limited partnership indirectly owning all of Southern Power's subsidiary'ssolar facilities, except the Roserock and Gaskell West facilities). SP Solar is the 51% majority owner of Boulder 1, Garland, Henrietta, Imperial Valley, Lost Hills Blackwell, North Star, and Tranquillity; the 66% majority owner of Desert Stateline; and the sole owner of the remaining SP Solar facilities. Southern Power is the 51% majority owner of Roserock and also the controlling partner in a tax equity interestpartnership owning Gaskell West. All of these entities are consolidated subsidiaries of Southern Power.
(3) See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in these facilities is 51%.Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing.
(4) Southern Power's subsidiary'sPower is the controlling member in SP Wind (a tax equity interest in this facility is 66%.
(5)entity owning all of Southern Power's subsidiary'swind facilities, except Cactus Flats, Wildhorse Mountain, and the two projects under construction, Reading and Skookumchuck). SP Wind is the 90.1% majority owner of Wake Wind and owns 100% of the remaining SP Wind facilities. Southern Power owns 100% of Reading and Skookumchuck and is the controlling partner in tax equity interest in this facility is 90.1%.partnerships owning Cactus Flats and Wildhorse Mountain. All of these entities are consolidated subsidiaries of Southern Power.
(6)(5) Subject to commercial operation.
For the year ended December 31, 2019, approximately 9.0% of Southern Power's revenues were derived from Georgia Power. Southern Power actively pursues replacement PPAs prior to the expiration of its current PPAs and anticipates that the revenues attributable to one customer may be replaced by revenues from a new customer; however, the expiration of any of Southern
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Power's current PPAs without the successful remarketing of a replacement PPA could have a material negative impact on Southern Power's earnings but is not expected to have a material impact on Southern Company's earnings.
Southern Company Gas
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas through the natural gas distribution utilities. Southern Company Gas is also involved in several other businesses that are complementary to the distribution of natural gas, including gas pipeline investments, wholesale gas services, and gas marketing services. Southern Company Gas also has an "all other" non-reportable segment that includes segments below the quantitative threshold for separate disclosure, including the storage and fuels operations, Pivotal LNG, and other subsidiaries that fall below the quantitative threshold for separate disclosure. See Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding Southern Company Gas' pending disposition of its interests in Pivotal LNG and Atlantic Coast Pipeline.
Gas distribution operations, the largest segment of Southern Company Gas' business, operates, constructs, and maintains approximately 75,585 miles of natural gas pipelines and 14 storage facilities, with total capacity of 157 Bcf, to provide natural gas to residential, commercial, and industrial customers. Gas distribution operations serves approximately 4.3 million customers across four states.
Gas pipeline investments primarily consists of joint ventures in natural gas pipeline investments including a 50% interest in SNG, two significant pipeline construction projects, and a 50% joint ownership interest in the Dalton Pipeline. These natural gas pipelines enable the provision of diverse sources of natural gas supplies to the customers of Southern Company Gas. SNG, the largest natural gas pipeline investment, is the owner of a 7,000-mile pipeline connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee. For additional information on Southern Company Gas's pipeline projects, see MANAGEMENT'S DISCUSSION AND ANALYSIS – "Southern Company Gas – Pipeline Construction Projects" in Item 7 herein and Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein.
Wholesale gas services consists of Sequent and engages in natural gas storage and gas pipeline arbitrage and provides natural gas asset management and related logistical services to most of the natural gas distribution utilities as well as non-affiliate companies.
Gas marketing services is comprised of SouthStar, which serves approximately 631,000 natural gas commodity customers, markets gas to residential, commercial, and industrial customers, and offers energy-related products that provide natural gas price stability and utility bill management in competitive markets or markets that provide for customer choice.
Other Businesses
PowerSecure, which was acquired by Southern Company in 2016, provides energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency.
Southern Holdings is an intermediate holding subsidiary, primarily for Southern Company's leveraged lease and other investments.
Southern Linc provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public. Southern Linc delivers multiple wireless communication options including push to talk, cellular service, text messaging, wireless internet access, and wireless data. Its system covers approximately 127,000 square miles in the Southeast. Southern Linc also provides fiber optics services within the Southeast through its subsidiary, Southern Telecom, Inc.
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Construction Programs
The subsidiary companies of Southern Company are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. For estimated construction and environmental expenditures for the periods 2020 through 2024, see MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and "Contractual Obligations" in Item 7 herein. The Southern Company system's construction program consists of capital investment and capital expenditures to comply with environmental laws and regulations. In 2020, the construction program is expected to be apportioned approximately as follows:
 
Southern Company
      system(a)(b)(c)
Alabama Power(a)(c)
Georgia
Power(a)
Mississippi Power
 (in billions)
New generation$2.3
$0.5
$1.8
$
Environmental compliance(d)
0.2
0.1
0.1

Generation maintenance0.9
0.4
0.5
0.1
Transmission1.0
0.4
0.5
0.1
Distribution1.3
0.5
0.8
0.1
Nuclear fuel0.3
0.1
0.2

General plant0.6
0.3
0.3

 6.5
2.1
4.1
0.3
Southern Power(e)
0.3
   
Southern Company Gas(f)
1.8
   
Other subsidiaries0.2
   
Total(a)
$8.7
$2.1
$4.1
$0.3
(a)Totals may not add due to rounding.
(b)
Includes the Subsidiary Registrants, as well as the other subsidiaries. See "Other Businesses" herein for additional information.
(c)
Includes approximately $0.5 billion contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerPetition for Certificate of Convenience and Necessity" in Item 7 herein for additional information.
(d)
Reflects cost estimates for environmental laws and regulations. These estimated expenditures do not include any potential compliance costs associated with pending regulation of CO2 emissions from fossil fuel-fired electric generating units or costs associated with closure and monitoring of ash ponds and landfills in accordance with the CCR Rule and the related state rules. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and "Contractual Obligations" in Item 7 herein for additional information.
(e)Does not include approximately $0.5 billion for planned expenditures for plant acquisitions and placeholder growth, which may vary materially due to market opportunities and Southern Power's ability to execute its growth strategy.
(f)
Includes costs for ongoing capital projects associated with infrastructure improvement programs for certain natural gas distribution utilities that have been previously approved by their applicable state regulatory agencies. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Construction ProgramsSouthern Company Gas" in Item 7 herein for additional information.
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; abnormal weather; delays in construction due to judicial or regulatory action; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. Additionally, Southern Power's planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy.
The construction program of Georgia Power also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" in Item 8 herein for additional information regarding Georgia Power's construction of Plant Vogtle Units 3 and 4.
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Also see MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein for additional information with respect to certain existing and proposed environmental requirements and PROPERTIES – "ElectricJointly-Owned Facilities" and – "Natural GasJointly-Owned Properties" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information concerning Alabama Power's, Georgia Power's, and Mississippi Power's joint ownership of certain generating units and related facilities with certain non-affiliated utilities and Southern Company Gas' joint ownership of a pipeline facility.
Financing Programs
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY in Item 7 herein and Note 8 to the financial statements in Item 8 herein for information concerning financing programs.
Fuel Supply
Electric
The traditional electric operating companies' and SEGCO's supply of electricity is primarily fueled by natural gas and coal. Southern Power's supply of electricity is primarily fueled by natural gas. See MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION – "Southern CompanyElectricity BusinessFuel and Purchased Power Expenses" and MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION under "Fuel and Purchased Power Expenses" for each of the traditional electric operating companies in Item 7 herein for information regarding the electricity generated and the average cost of fuel in cents per net KWH generated for the years 2018 and 2019.
The traditional electric operating companies have agreements in place from which they expect to receive substantially all of their 2020 coal burn requirements. These agreements have terms ranging between one and four years. Fuel procurement specifications, emission allowances, environmental control systems, and fuel changes have allowed the traditional electric operating companies to remain within limits set by applicable environmental regulations. As new environmental regulations are proposed that impact the utilization of coal, the traditional electric operating companies' fuel mix will be monitored to help ensure that the traditional electric operating companies remain in compliance with applicable laws and regulations. Additionally, Southern Company and the traditional electric operating companies will continue to evaluate the need to purchase additional emissions allowances, the timing of capital expenditures for environmental control equipment, and potential unit retirements and replacements. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein for additional information on environmental matters.
SCS, acting on behalf of the traditional electric operating companies and Southern Power Company, has agreements in place for the natural gas burn requirements of the Southern Company system. For 2020, SCS has contracted for 530 Bcf of natural gas supply under agreements with remaining terms up to 14 years. In addition to natural gas supply, SCS has contracts in place for both firm natural gas transportation and storage. Management believes these contracts provide sufficient natural gas supplies, transportation, and storage to ensure normal operations of the Southern Company system's natural gas generating units.
Alabama Power and Georgia Power have multiple contracts covering their nuclear fuel needs for uranium, conversion services, enrichment services, and fuel fabrication with remaining terms ranging from one to 14 years. Management believes suppliers have sufficient nuclear fuel production capability to permit the normal operation of the Southern Company system's nuclear generating units.
Changes in fuel prices to the traditional electric operating companies are generally reflected in fuel adjustment clauses contained in rate schedules. See "Rate Matters – Rate Structure and Cost Recovery Plans" herein for additional information. Southern Power's natural gas PPAs generally provide that the counterparty is responsible for substantially all of the cost of fuel.
Alabama Power and Georgia Power have contracts with the United States, acting through the DOE, that provide for the permanent disposal of spent nuclear fuel. The DOE failed to begin disposing of spent fuel in 1998, as required by the contracts, and Alabama Power and Georgia Power have pursued and are pursuing legal remedies against the government for breach of contract. See Note 3 to the financial statements under "Nuclear Fuel Disposal Costs" in Item 8 herein for additional information.
Natural Gas
Advances in natural gas drilling in shale producing regions of the United States have resulted in historically high supplies of natural gas and low prices for natural gas. Procurement plans for natural gas supply and transportation to serve regulated utility customers are reviewed and approved by the regulatory agencies in the states where Southern Company Gas operates. Southern Company Gas purchases natural gas supplies in the open market by contracting with producers and marketers and, for the natural gas distribution utilities except Nicor Gas, from its wholly-owned subsidiary, Sequent, under asset management agreements approved by the applicable state regulatory agency. Southern Company Gas also contracts for transportation and
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storage services from interstate pipelines that are regulated by the FERC. When firm pipeline services are temporarily not needed, Southern Company Gas may release the services in the secondary market under FERC-approved capacity release provisions or utilize asset management arrangements, thereby reducing the net cost of natural gas charged to customers for most of the natural gas distribution utilities. Peak-use requirements are met through utilization of company-owned storage facilities, pipeline transportation capacity, purchased storage services, peaking facilities, and other supply sources, arranged by either transportation customers or Southern Company Gas.
Territory Served by the Southern Company System
Traditional Electric Operating Companies and Southern Power
The territory in which the traditional electric operating companies provide retail electric service comprises most of the states of Alabama and Georgia, together with southeastern Mississippi. In this territory there are non-affiliated electric distribution systems that obtain some or all of their power requirements either directly or indirectly from the traditional electric operating companies. As of December 31, 2019, the territory had an area of approximately 116,000 square miles and an estimated population of approximately 16 million. Southern Power sells wholesale electricity at market-based rates across various U.S. utility markets, primarily to investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Alabama Power is engaged, within the State of Alabama, in the generation, transmission, distribution, and purchase of electricity and the sale of electric service, at retail in approximately 400 cities and towns (including Anniston, Birmingham, Gadsden, Mobile, Montgomery, and Tuscaloosa), as well as in rural areas, and at wholesale to 11 municipally-owned electric distribution systems, all of which are served indirectly through sales to AMEA, and two rural distributing cooperative associations. The sales contract with AMEA is scheduled to expire on December 31, 2025. Alabama Power owns coal reserves near its Plant Gorgas site and uses the output of coal from the reserves in its generating plants. In addition, Alabama Power sells, and cooperates with dealers in promoting the sale of, electric appliances and products and also markets and sells outdoor lighting services.
Georgia Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within the State of Georgia, at retail in over 530 cities and towns (including Athens, Atlanta, Augusta, Columbus, Macon, Rome, and Savannah), as well as in rural areas, and at wholesale to OPC, MEAG Power, Dalton, various EMCs, and non-affiliated utilities. Georgia Power also markets and sells outdoor lighting services and other customer-focused utility services.
Mississippi Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within 23 counties in southeastern Mississippi, at retail in 123 communities (including Biloxi, Gulfport, Hattiesburg, Laurel, Meridian, and Pascagoula), as well as in rural areas, and at wholesale to one municipality, six rural electric distribution cooperative associations, and one generating and transmitting cooperative.
For information relating to KWH sales by customer classification for the traditional electric operating companies, see MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATIONS in Item 7 herein. For information relating to the number of retail customers served by customer classification for the traditional electric operating companies, see SELECTED FINANCIAL DATA of Southern Company and each traditional electric operating company in Item 6 herein. Also, for information relating to the sources of revenues for Southern Company, each traditional electric operating company, and Southern Power, see Item 7 herein and Note 1 to the financial statements under "RevenuesTraditional Electric Operating Companies" and " – Southern Power" and Note 4 to the financial statements in Item 8 herein.
As of December 31, 2019, there were approximately 62 electric cooperative distribution systems operating in the territories in which the traditional electric operating companies provide electric service at retail or wholesale.
One of these organizations, PowerSouth, is a generating and transmitting cooperative selling power to several distributing cooperatives, municipal systems, and other customers in south Alabama. As of December 31, 2019, PowerSouth owned generating units with approximately 2,100 MWs of nameplate capacity, including an undivided 8.16% ownership interest in Alabama Power's Plant Miller Units 1 and 2. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for details of Alabama Power's joint-ownership with PowerSouth of a portion of Plant Miller. Alabama Power has system supply agreements with PowerSouth to provide 200 MWs of year-round capacity service through January 31, 2024 and 200 MWs of winter-only capacity service through December 31, 2023. In August 2019, Alabama Power agreed to provide PowerSouth an additional 100 MWs of year-round capacity service from November 1, 2020 through February 28, 2023, with the option to extend through May 31, 2023.
Alabama Power has entered into a separate agreement with PowerSouth involving interconnection between their systems. The delivery of capacity and energy from PowerSouth to certain distributing cooperatives in the service territory of Alabama Power is governed by the Southern Company/PowerSouth Network Transmission Service Agreement. The rates for this service to PowerSouth are on file with the FERC.
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OPC is an EMC owned by its 38 retail electric distribution cooperatives, which provide retail electric service to customers in Georgia. OPC provides wholesale electric power to its members through its generation assets, some of which are jointly owned with Georgia Power, and power purchased from other suppliers. OPC and the 38 retail electric distribution cooperatives are members of Georgia Transmission Corporation, an EMC (GTC), which provides transmission services to its members and third parties. See PROPERTIES – "ElectricJointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information regarding Georgia Power's jointly-owned facilities.
Mississippi Power has an interchange agreement with Cooperative Energy, a generating and transmitting cooperative, pursuant to which various services are provided.
As of December 31, 2019, there were approximately 72 municipally-owned electric distribution systems operating in the territory in which the traditional electric operating companies provide electric service at retail or wholesale.
As of December 31, 2019, 48 municipally-owned electric distribution systems and one county-owned system received their requirements through MEAG Power, which was established by a Georgia state statute in 1975. MEAG Power serves these requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and purchases from other resources. MEAG Power also has a pseudo scheduling and services agreement with Georgia Power. Dalton serves its requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and through purchases from Southern Power through a service agreement. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
Georgia Power has entered into substantially similar agreements with GTC, MEAG Power, and Dalton providing for the establishment of an integrated transmission system to carry the power and energy of all parties. The agreements require an investment by each party in the integrated transmission system in proportion to its respective share of the aggregate system load. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information.
Southern Power has PPAs with Georgia Power, investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. See "The Southern Company System – Southern Power" herein and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Southern Power's Power Sales Agreements" in Item 7 herein for additional information.
SCS, acting on behalf of the traditional electric operating companies, also has a contract with SEPA providing for the use of the traditional electric operating companies' facilities at government expense to deliver to certain cooperatives and municipalities, entitled by federal statute to preference in the purchase of power from SEPA, quantities of power equivalent to the amounts of power allocated to them by SEPA from certain U.S. government hydroelectric projects.
Southern Company Gas
Southern Company Gas is engaged in the distribution of natural gas in four states through the natural gas distribution utilities. The natural gas distribution utilities construct, manage, and maintain intrastate natural gas pipelines and distribution facilities. Details of the natural gas distribution utilities at December 31, 2019 are as follows:
UtilityStateNumber of customers
Approximate miles of pipe
  (in thousands) 
Nicor GasIllinois2,245
34,346
Atlanta Gas LightGeorgia1,661
33,844
Virginia Natural GasVirginia303
5,719
Chattanooga GasTennessee68
1,676
Total 4,277
75,585
For information relating to the sources of revenue for Southern Company Gas, see Item 7 herein and Note 1 to the financial statements under "RevenuesSouthern Company Gas" and Note 4 to the financial statements in Item 8 herein.
Competition
Electric
The electric utility industry in the U.S. is continuing to evolve as a result of regulatory and competitive factors. The competition for retail energy sales among competing suppliers of energy is influenced by various factors, including price, availability, technological advancements, service, and reliability. These factors are, in turn, affected by, among other influences, regulatory, political, and environmental considerations, taxation, and supply.
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The retail service rights of all electric suppliers in the State of Georgia are regulated by the Territorial Electric Service Act of 1973. Pursuant to standards set forth in this Act, the Georgia PSC has assigned substantially all of the land area in the state to a supplier. Notwithstanding such assignments, this Act provides that any new customer locating outside of 1973 municipal limits and having a connected load of at least 900 KWs may exercise a one-time choice for the life of the premises to receive electric service from the supplier of its choice.
Pursuant to the 1956 Utility Act, the Mississippi PSC issued "Grandfather Certificates" of public convenience and necessity to Mississippi Power and to six distribution rural cooperatives operating in southeastern Mississippi, then served in whole or in part by Mississippi Power, authorizing them to distribute electricity in certain specified geographically described areas of the state. The six cooperatives serve approximately 325,000 retail customers in a certificated area of approximately 10,300 square miles. In areas included in a "Grandfather Certificate," the utility holding such certificate may extend or maintain its electric system subject to certain regulatory approvals; extensions of facilities by such utility, or extensions of facilities into that area by other utilities, may not be made unless the Mississippi PSC grants a CPCN. Areas included in a CPCN that are subsequently annexed to municipalities may continue to be served by the holder of the CPCN, irrespective of whether it has a franchise in the annexing municipality. On the other hand, the holder of the municipal franchise may not extend service into such newly annexed area without authorization by the Mississippi PSC.
Generally, the traditional electric operating companies have experienced, and expect to continue to experience, competition in their respective retail service territories in varying degrees from the development and deployment of alternative energy sources such as self-generation (as described below) and distributed generation technologies, as well as other factors.
Southern Power competes with investor-owned utilities, IPPs, and others for wholesale energy sales across various U.S. utility markets. The needs of these markets are driven by the demands of end users and the generation available. Southern Power's success in wholesale energy sales is influenced by various factors including reliability and availability of Southern Power's plants, availability of transmission to serve the demand, price, and Southern Power's ability to contain costs.
As of December 31, 2019, Alabama Power had cogeneration contracts in effect with six industrial customers. Under the terms of these contracts, Alabama Power purchases excess energy generated by such companies. During 2019, Alabama Power purchased approximately 123 million KWHs from such companies at a cost of $3 million.
As of December 31, 2019, Georgia Power had contracts in effect to purchase generation from 33 small IPPs. During 2019, Georgia Power purchased 2.7 billion KWHs from such companies at a cost of $176 million. Georgia Power also has PPAs for electricity with six cogeneration facilities. Payments are subject to reductions for failure to meet minimum capacity output. During 2019, Georgia Power purchased 390 million KWHs at a cost of $31 million from these facilities.
As of December 31, 2019, Mississippi Power had a cogeneration agreement in effect with one of its industrial customers. Under the terms of this contract, Mississippi Power purchases any excess generation. During 2019, Mississippi Power did not make any such purchases.
Natural Gas
Southern Company Gas' natural gas distribution utilities do not compete with other distributors of natural gas in their exclusive franchise territories but face competition from other energy products. Their principal competitors are electric utilities and fuel oil and propane providers serving the residential, commercial, and industrial markets in their service areas for customers who are considering switching to or from a natural gas appliance.
Competition for heating as well as general household and small commercial energy needs generally occurs at the initial installation phase when the customer or builder makes decisions as to which types of equipment to install. Customers generally use the chosen energy source for the life of the equipment.
Customer demand for natural gas could be affected by numerous factors, including:
changes in the availability or price of natural gas and other forms of energy;
general economic conditions;
energy conservation, including state-supported energy efficiency programs;
legislation and regulations;
the cost and capability to convert from natural gas to alternative energy products; and
technological changes resulting in displacement or replacement of natural gas appliances.
The natural gas-related programs generally emphasize natural gas as the fuel of choice for customers and seek to expand the use of natural gas through a variety of promotional activities. In addition, Southern Company Gas partners with third-party entities to market the benefits of natural gas appliances.
The availability and affordability of natural gas have provided cost advantages and further opportunity for growth of the businesses.
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Seasonality
The demand for electric power and natural gas supply is affected by seasonal differences in the weather. While the electric power sales of some electric utilities peak in the summer, others peak in the winter. In the aggregate, during normal weather conditions, the Southern Company system's electric power sales peak during both the summer and winter. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. As a result, the overall operating results of the Registrants in the future may fluctuate substantially on a seasonal basis. In addition, the Subsidiary Registrants have historically sold less power and natural gas when weather conditions are milder.
Regulation
States
The traditional electric operating companies and the natural gas distribution utilities are subject to the jurisdiction of their respective state PSCs or applicable state regulatory agencies. These regulatory bodies have broad powers of supervision and regulation over public utilities operating in the respective states, including their rates, service regulations, sales of securities (except for the Mississippi PSC), and, in the cases of the Georgia PSC and the Mississippi PSC, in part, retail service territories. See "Territory Served by the Southern Company System" and "Rate Matters" herein for additional information.
Federal Power Act
The traditional electric operating companies, Southern Power Company and certain of its generation subsidiaries, and SEGCO are all public utilities engaged in wholesale sales of energy in interstate commerce and, therefore, are subject to the rate, financial, and accounting jurisdiction of the FERC under the Federal Power Act. The FERC must approve certain financings and allows an "at cost standard" for services rendered by system service companies such as SCS and Southern Nuclear. The FERC is also authorized to establish regional reliability organizations which enforce reliability standards, address impediments to the construction of transmission, and prohibit manipulative energy trading practices.
Alabama Power and Georgia Power are also subject to the provisions of the Federal Power Act or the earlier Federal Water Power Act applicable to licensees with respect to their hydroelectric developments. As of December 31, 2019, among the hydroelectric projects subject to licensing by the FERC are 14 existing Alabama Power generating stations having an aggregate installed capacity of 1,670,000 KWs and 17 existing Georgia Power generating stations and one generating station partially owned by Georgia Power, with a combined aggregate installed capacity of 1,101,402 KWs.
In 2013, the FERC issued a new 30-year license to Alabama Power for Alabama Power's seven hydroelectric developments on the Coosa River (Weiss, Henry, Logan Martin, Lay, Mitchell, Jordan, and Bouldin). Alabama Power filed a petition requesting rehearing of the FERC order granting the relicense seeking revisions to several conditions of the license. In 2016, the FERC issued an order granting in part and denying in part Alabama Power's rehearing request. American Rivers and Alabama Rivers Alliance also filed multiple appeals of the FERC's 2013 order for the new 30-year license and, in July 2018, the U.S. Court of Appeals for the District of Columbia Circuit vacated the order and remanded the proceeding to the FERC. Alabama Power continues to operate the Coosa River developments under annual licenses issued by the FERC. The ultimate outcome of this matter cannot be determined at this time.
In 2019, Alabama Power continued the process of developing an application to relicense the Harris Dam project on the Tallapoosa River, which is expected to be filed with the FERC by November 30, 2021. The current Harris Dam project license will expire on November 30, 2023.
In May 2018, Georgia Power filed an application to relicense the Wallace Dam project on the Oconee River. The current Wallace Dam project license will expire on June 1, 2020. In July 2018, Georgia Power filed a Notice of Intent to relicense the Lloyd Shoals project on the Ocmulgee River. The application to relicense the Lloyd Shoals project is expected to be filed with the FERC by December 31, 2021. The current Lloyd Shoals project license will expire on December 31, 2023. In December 2018, Georgia Power filed applications to surrender the Langdale and Riverview hydroelectric projects on the Chattahoochee River upon their license expirations on December 31, 2023. Both projects together represent 1,520 KWs of Georgia Power's hydro fleet capacity.
Georgia Power and OPC also have a license, expiring in 2026, for the Rocky Mountain project, a pure pumped storage facility of 903,000 KW installed capacity. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information.
Licenses for all projects, excluding those discussed above, expire in the years 2034-2066 in the case of Alabama Power's projects and in the years 2035-2044 in the case of Georgia Power's projects.
Upon or after the expiration of each license, the U.S. Government, by act of Congress, may take over the project or the FERC may relicense the project either to the original licensee or to a new licensee. In the event of takeover or relicensing to another, the original licensee is to be compensated in accordance with the provisions of the Federal Power Act, such compensation to
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reflect the net investment of the licensee in the project, not in excess of the fair value of the property, plus reasonable damages to other property of the licensee resulting from the severance therefrom of the property. The FERC may grant relicenses subject to certain requirements that could result in additional costs.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Regulation
Alabama Power, Georgia Power, and Southern Nuclear are subject to regulation by the NRC. The NRC is responsible for licensing and regulating nuclear facilities and materials and for conducting research in support of the licensing and regulatory process, as mandated by the Atomic Energy Act of 1954, as amended; the Energy Reorganization Act of 1974, as amended; and the Nuclear Nonproliferation Act of 1978, as amended; and in accordance with the National Environmental Policy Act of 1969, as amended, and other applicable statutes. These responsibilities also include protecting public health and safety, protecting the environment, protecting and safeguarding nuclear materials and nuclear power plants in the interest of national security, and assuring conformity with antitrust laws.
The NRC licenses for Georgia Power's Plant Hatch Units 1 and 2 expire in 2034 and 2038, respectively. The NRC licenses for Alabama Power's Plant Farley Units 1 and 2 expire in 2037 and 2041, respectively. The NRC licenses for Plant Vogtle Units 1 and 2 expire in 2047 and 2049, respectively.
In 2012, the NRC issued combined construction and operating licenses (COLs) for Plant Vogtle Units 3 and 4. Receipt of the COLs allowed full construction to begin. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" in Item 7 herein and Note 2 to the financial statements under "Georgia PowerNuclear Construction" in Item 8 herein for additional information.
See Notes 3 and 6 to the financial statements under "Nuclear Insurance" and "Nuclear Decommissioning," respectively, in Item 8 herein for information on nuclear insurance and nuclear decommissioning costs.
Environmental Laws and Regulations
See "Construction Programs" herein, MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein, and Note 3 to the financial statements under "Environmental Remediation" and Note 6 to the financial statements in Item 8 herein for information concerning environmental laws and regulations impacting the Registrants.
Rate Matters
Rate Structure and Cost Recovery Plans
Electric
The rates and service regulations of the traditional electric operating companies are uniform for each class of service throughout their respective retail service territories. Rates for residential electric service are generally of the block type based upon KWHs used and include minimum charges. Residential and other rates contain separate customer charges. Rates for commercial service are presently of the block type and, for large customers, the billing demand is generally used to determine capacity and minimum bill charges. These large customers' rates are generally based upon usage by the customer and include rates with special features to encourage off-peak usage. Additionally, Alabama Power and Mississippi Power are generally allowed by their respective state PSCs to negotiate the terms and cost of service to large customers. Such terms and cost of service, however, are subject to final state PSC approval.
The traditional electric operating companies recover certain costs through a variety of forward-looking, cost-based rate mechanisms. Fuel and net purchased energy costs are recovered through specific fuel cost recovery provisions. These fuel cost recovery provisions are adjusted to reflect increases or decreases in such costs as needed or on schedules as required by the respective PSCs. Approved compliance, storm damage, and certain other costs are recovered at Alabama Power and Mississippi Power through specific cost recovery mechanisms approved by their respective PSCs. Certain similar costs at Georgia Power are recovered through various base rate tariffs as approved by the Georgia PSC. Costs not recovered through specific cost recovery mechanisms are recovered at Alabama Power and Mississippi Power through annual, formulaic cost recovery proceedings and at Georgia Power through periodic base rate proceedings.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters" in Item 7 herein and Note 2 to the financial statements in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms. Also, see "Integrated Resource Planning" herein for additional information.
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The traditional electric operating companies and Southern Power Company and certain of its generation subsidiaries are authorized by the FERC to sell power to non-affiliates, including short-term opportunity sales, at market-based prices. Specific FERC approval must be obtained with respect to a market-based contract with an affiliate.
Mississippi Power serves long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs, which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Natural Gas
Southern Company Gas' natural gas distribution utilities are subject to regulation and oversight by their respective state regulatory agencies. Rates charged to these customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide each natural gas distribution utility the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt, and provide a reasonable return.
With the exception of Atlanta Gas Light, which operates in a deregulated environment in which Marketers rather than a traditional utility sell natural gas to end-use customers and earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas.
The natural gas distribution utilities, excluding Atlanta Gas Light, are authorized to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities have other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters – Southern Company Gas" in Item 7 herein and Note 2 to the financial statements under "Southern Company Gas" in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms.
Integrated Resource Planning
Each of the traditional electric operating companies continually evaluates its electric generating resources in order to ensure that it maintains a cost-effective and reliable mix of resources to meet the existing and future demand requirements of its customers. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein for a discussion of existing and potential environmental regulations that may impact the future generating resource needs of the traditional electric operating companies.
Alabama Power
Triennially, Alabama Power provides an IRP report to the Alabama PSC. This report overviews Alabama Power's resource planning process and contains information that serves as the foundation for certain decisions affecting Alabama Power's portfolio of supply-side and demand-side resources. The IRP report facilitates Alabama Power's ability to provide reliable and cost-effective electric service to customers, while accounting for the risks and uncertainties inherent in planning for resources sufficient to meet expected customer demand. Under State of Alabama law, a CCN must be obtained from the Alabama PSC before Alabama Power constructs any new generating facility, unless such construction is deemed an ordinary extension in the usual course of business. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" in Item 8 herein for additional information.
Georgia Power
Triennially, Georgia Power must file an IRP with the Georgia PSC that specifies how it intends to meet the future electric service needs of its customers through a combination of demand-side and supply-side resources. The Georgia PSC, under state law, must certify any new demand-side or supply-side resources for Georgia Power to receive cost recovery. Once certified, the lesser of actual or certified construction costs and purchased power costs is recoverable through rates. Certified costs may be excluded from recovery only on the basis of fraud, concealment, failure to disclose a material fact, imprudence, or criminal misconduct. See Note 2 to the financial statements under "Georgia Power – Rate Plans" and " – Integrated Resource Plan." Also see Note 2 under and "Georgia PowerNuclear Construction" in Item 8 herein for additional information on the Georgia Nuclear Energy Financing Act and the Georgia PSC certification of Plant Vogtle Units 3 and 4, which allow Georgia Power to recover certain financing costs for construction of Plant Vogtle Units 3 and 4.
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Mississippi Power
In November 2019, the Mississippi PSC established the Integrated Resource Planning and Reporting Rule (IRP Rule), which is intended to allow electric utilities the flexibility to formulate long-term plans to best meet the needs of their customers through a combination of demand-side and supply-side resources and considering transmission needs. The IRP Rule establishes reporting requirements that include the filing of an IRP on a three-year cycle, with supply-side updates midway through the three-year cycle, and an annual report on energy delivery improvements. The IRP filing is not intended to supplant or replace the Mississippi PSC's existing regulatory processes for petition and approval of CCNs for new generating resources. Mississippi Power will file its first triennial IRP in compliance with the IRP Rule in April 2021.
In February 2018, the Mississippi PSC approved a settlement agreement related to cost recovery for the Kemper County energy facility, pursuant to which Mississippi Power filed a Reserve Margin Plan (RMP) in August 2018, which it updated on December 31, 2019. The ultimate outcome of this matter cannot be determined at this time. For additional information, see Note 2 to the financial statements under "Mississippi PowerReserve Margin Plan" in Item 8 herein.
Employee Relations
The Southern Company system had a total of 27,943 employees on its payroll at December 31, 2019.
Employees at
December 31, 2019
Alabama Power6,324
Georgia Power6,938
Mississippi Power1,030
PowerSecure910
SCS3,697
Southern Company Gas4,446
Southern Nuclear3,940
Southern Power460
Other198
Total27,943
The traditional electric operating companies and the natural gas distribution utilities have separate agreements with local unions of the IBEW and the Utilities Workers Union of America generally covering wages, working conditions, and procedures for handling grievances and arbitration. These agreements apply with certain exceptions to operating, maintenance, and construction employees.
Alabama Power has agreements with the IBEW in effect through August 14, 2025. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
Georgia Power has an agreement with the IBEW covering wages and working conditions, which is in effect through June 30, 2021.
Mississippi Power has an agreement with the IBEW covering wages and working conditions, which is in effect through May 1, 2024.
Southern Nuclear has a five-year agreement with the IBEW covering certain employees at Plants Hatch and Plant Vogtle Units 1 and 2, which is in effect through June 30, 2021. A five-year agreement between Southern Nuclear and the IBEW representing certain employees at Plant Farley is in effect through August 15, 2024. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
The agreements also make the terms of the pension plans for the companies discussed above subject to collective bargaining with the unions at either a five-year or a 10-year cycle, depending upon union and company actions.
The natural gas distribution utilities have separate agreements with different local unions of the IBEW covering wages, benefits, working conditions, and procedures for handling grievances and arbitration. Nicor Gas' agreement with the IBEW is effective through February 29, 2020 and negotiations on a new agreement commenced on January 9, 2020. Virginia Natural Gas' agreement with the IBEW is effective through May 15, 2020. Notice has been given to Virginia Natural Gas by the IBEW of their intent to negotiate changes to the agreement prior to the expiration date. A new IBEW local union was certified at Atlanta Gas Light in April 2018 and negotiations for a new agreement are ongoing.
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Item 1A. RISK FACTORS
In addition to the other information in this Form 10-K, includingMANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL in Item 7, and other documents filed by Southern Company and/or itssubsidiaries with the SEC from time to time, the following factors should becarefully considered in evaluating Southern Company and its subsidiaries. Suchfactors could affect actual results and cause results to differ materially fromthose expressed in any forward-looking statements made by, or on behalf of, SouthernCompany and/or its subsidiaries.
UTILITY REGULATORY, LEGISLATIVE, AND LITIGATION RISKS
Southern Company and its subsidiaries are subject to substantial federal, state, and local governmentalregulation, including with respect to rates. Compliance with current and future regulatory requirements andprocurement of necessary approvals, permits, and certificates may result insubstantial costs to Southern Company and its subsidiaries.
Laws and regulations govern the terms and conditions of the services the Southern Company system offers, protection of critical electric infrastructure assets, transmission planning, reliability, pipeline safety, interaction with wholesale markets, and relationships with affiliates, among other matters. The Registrants' businesses are subject to regulatory regimes which could result in substantial monetary penalties if a Registrant is found to be noncompliant.
The traditional electric operating companies and the natural gas distribution utilities seek to recover their costs, including compliance costs (including a reasonable return on invested capital), through their retail rates, which must be approved by the applicable state PSC or other applicable state regulatory agency. Such regulators, in a future rate proceeding, may alter the timing or amount of certain costs for which recovery is allowed or modify the current authorized rate of return. Rate refunds may also be required. Additionally, the rates charged to wholesale customers by the traditional electric operating companies and by Southern Power and the rates charged to natural gas transportation customers by Southern Company Gas' pipeline investments and for some of its storage assets must be approved by the FERC. These wholesale rates could be affected by changes to Southern Power's and the traditional electric operating companies' ability to conduct business pursuant to FERC market-based rate authority.
A small percentage of transmission revenues are collected through wholesale electric tariffs but the majority are collected through retail rates. FERC rules pertaining to regional transmission planning and cost allocation, which are intended to spur the development of new transmission infrastructure to promote the integration of renewable resources as well as facilitate competition in the wholesale market by providing more choices to wholesale customers, present challenges to transmission planning and the wholesale market structure.
The impact of any future revision or changes in interpretations of existing regulations or the adoption of new laws and regulations applicable to Southern Company or any of its subsidiaries is uncertain. Changes in regulation, the imposition of additional regulations, changes in enforcement practices of regulators, or penalties imposed for noncompliance with existing laws or regulations could influence the operating environment of Southern Company and its subsidiaries and may result in substantial costs or otherwise negatively affect their results of operations.
The Southern Company system's costs of compliance with environmental laws and satisfying related AROs are significant and could negatively impact the net income, cash flows, and financial condition of the Registrants.
The Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and other natural resources. Compliance with existing environmental requirements involves significant capital and operating costs including the settlement of AROs, a major portion of which is expected to be recovered through retail and wholesale rates. There is no assurance, however, that all such costs will be recovered. The Registrants expect future compliance expenditures will continue to be significant.
The EPA has adopted and is implementing regulations governing air quality under the Clean Air Act and water quality under the Clean Water Act, including regulations governing cooling water intake structures and effluent guidelines for steam electric generating plants. The EPA has also adopted regulations governing the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments at active generating power plants. The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule. The traditional electric operating companies will continue to periodically update their ARO cost estimates.
Additionally, environmental laws and regulations covering the handling and disposal of waste and release of hazardous substances could require the Southern Company system to incur substantial costs to clean up affected sites, including certain current and former operating sites, and locations subject to contractual obligations.
Litigation over environmental issues and claims of various types, including property damage, personal injury, and citizen enforcement of environmental requirements has occurred throughout the U.S. This litigation has included claims for damages
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alleged to have been caused by CO2 and other emissions, CCR, releases of regulated substances, and alleged exposure to regulated substances, and/or requests for injunctive relief in connection with such matters.
Compliance with any new or revised environmental laws or regulations could affect many areas of operations for the Southern Company system. The Southern Company system's ultimate environmental compliance strategy and future environmental expenditures will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed control technology, fuel prices, and the outcome of pending and/or future legal challenges. Compliance costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. Environmental compliance spending over the next several years may differ materially from the amounts estimated and could affect results of operations, cash flows, and/or financial condition if such costs cannot continue to be recovered on a timely basis. Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity and natural gas, which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to affect their demand for electricity or natural gas.
The Southern Company system may be exposed to regulatory and financial risks related to the impact of GHG legislation, regulation, and emission reduction goals.
Costs associated with GHG legislation, regulation, and emission reduction goals could be significant. Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy. However, the ultimate impact will depend on various factors, such as state adoption and implementation of requirements, low natural gas prices, the development, deployment, and advancement of relevant energy technologies, the ability to recover costs through existing ratemaking provisions, and the outcome of pending and/or future legal challenges.
Because natural gas is a fossil fuel with lower carbon content relative to other fossil fuels, future GHG constraints, including, but not limited to, the imposition of a carbon tax, may create additional demand for natural gas, both for production of electricity and direct use in homes and businesses. Future GHG constraints designed to minimize emissions from natural gas could likewise result in increased costs to the Southern Company system and affect the demand for natural gas as well as the prices charged to customers and the competitive position of natural gas.
In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. The Southern Company system's ability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies. The Southern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the use of natural gas for generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to lower GHG emissions. The Southern Company system is also evaluating methods of removing carbon from the atmosphere.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Global Climate Issues" in Item 7 herein for additional information.
OPERATIONAL RISKS
The financial performance of Southern Company and its subsidiaries may be adverselyaffected if the subsidiaries are unable to successfully operate their facilities or perform certain corporate functions.
The financial performance of Southern Company and its subsidiaries depends on the successful operation of the electric generation, transmission, and distribution facilities, natural gas distribution and storage facilities, and distributed generation storage technologies and the successful performance of necessary corporate functions. There are many risks that could affect these operations and performance of corporate functions, including operator error or failure of equipment or processes, accidents, operating limitations that may be imposed by environmental or other regulatory requirements or in connection with joint owner arrangements, labor disputes, physical attacks, fuel or material supply interruptions and/or shortages, transmission disruption or capacity constraints, including with respect to the Southern Company system's and third parties' transmission, storage, and transportation facilities, compliance with mandatory reliability standards, including mandatory cyber security standards, implementation of new technologies, information technology (IT) system failures, cyber intrusions, environmental events, such as spills or releases, and catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, or other similar occurrences.
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A decrease or elimination of revenues from the electric generation, transmission, or distribution facilities or natural gas distribution or storage facilities or an increase in the cost of operating the facilities would reduce the net income and cash flows and could adversely impact the financial condition of the affected Registrant.
Operation of nuclear facilities involves inherent risks, including environmental,safety, health, regulatory, natural disasters, cyber intrusions or physical attacks, and financial risks, that could result in fines or theclosure of the nuclear units owned by Alabama Power or Georgia Powerand which may present potential exposures in excess of insurance coverage.
Alabama Power owns, and contracts for the operation of, two nuclear units and Georgia Power holds undivided interests in, and contracts for the operation of, four existing nuclear units. The six existing units are operated by Southern Nuclear and represented approximately 25% and 26% of the total KWHs generated by Alabama Power and Georgia Power, respectively, in the year ended December 31, 2019. In addition, Southern Nuclear, on behalf of Georgia Power and the other Vogtle Owners, is managing the construction of Plant Vogtle Units 3 and 4. Nuclear facilities are subject to environmental, safety, health, operational, and financial risks such as:
the potential harmful effects on the environment and human health and safety resulting from a release of radioactive materials;
uncertainties with respect to the ability to dispose of spent nuclear fuel and the need for longer term on-site storage;
uncertainties with respect to the technological and financial aspects of decommissioning nuclear plants at the end of licensed lives and the ability to maintain and anticipate adequate capital reserves for decommissioning;
limitations on the amounts and types of insurance commercially available to cover losses that might arise in connection with any nuclear operations; and
significant capital expenditures relating to maintenance, operation, security, and repair of these facilities.
Damages, decommissioning, or other costs could exceed the amount of decommissioning trusts or external insurance coverage, including statutorily required nuclear incident insurance.
The NRC has broad authority under federal law to impose licensing and safety-related requirements for the operation of nuclear facilities. In the event of non-compliance, the NRC has the authority to impose fines and/or shut down any unit, depending upon its assessment of the severity of the situation, until compliance is achieved. NRC orders or regulations related to increased security measures and any future NRC safety requirements could require Alabama Power and Georgia Power to make substantial operating and capital expenditures at their nuclear plants. In addition, if a serious nuclear incident were to occur, it could result in substantial costs to Alabama Power or Georgia Power and Southern Company. A major incident at a nuclear facility anywhere in the world could cause the NRC to delay or prohibit construction of new nuclear units or require additional safety measures at new and existing units. Moreover, a major incident at any nuclear facility in the U.S., including facilities owned and operated by third parties, could require Alabama Power and Georgia Power to make material contributory payments.
In addition, actual or potential threats of cyber intrusions or physical attacks could result in increased nuclear licensing or compliance costs that are difficult to predict.
Transporting and storing natural gas involves risks that may result in accidents and other operating risks and costs.
Southern Company Gas' natural gas distribution and storage activities involve a variety of inherent hazards and operating risks, such as leaks, accidents, explosions, and mechanical problems, which could result in serious injury, loss of life, significant damage to property, environmental pollution, and impairment of its operations. The location of pipelines and storage facilities near populated areas could increase the level of damage resulting from these risks. Additionally, these pipeline and storage facilities are subject to various state and other regulatory requirements. Failure to comply with these requirements could result in substantial monetary penalties or potential early retirement of storage facilities, which could trigger an associated impairment. The occurrence of any of these events not fully covered by insurance or otherwise could adversely affect Southern Company Gas' and Southern Company's financial condition and results of operations.
Physical attacks, both threatened and actual, could impact the ability of the Subsidiary Registrants to operate and could adversely affect financial results and liquidity.
The Subsidiary Registrants face the risk of physical attacks, both threatened and actual, against their respective generation and storage facilities and the transmission and distribution infrastructure used to transport energy, which could negatively impact their ability to generate, transport, and deliver power, or otherwise operate their respective facilities, or, with respect to Southern Company Gas, its ability to distribute or store natural gas, or otherwise operate its facilities, in the most efficient manner or at all. In addition, physical attacks against third-party providers could have a similar effect on the Southern Company system.
Despite the implementation of robust security measures, all assets are potentially vulnerable to disability, failures, or unauthorized access due to human error, natural disasters, technological failure, or internal or external physical attacks. If assets
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were to fail, be physically damaged, or be breached and were not restored in a timely manner, the affected Subsidiary Registrant may be unable to fulfill critical business functions. Moreover, the amount and scope of insurance maintained against losses resulting from any such events or physical security breaches may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result.
These events could harm the reputation of and negatively affect the financial results of the Registrants through lost revenues and costs to repair damage, if such costs cannot be recovered.
An information security incident, including a cybersecurity breach, or the failure of one or more key IT systems, networks, or processes could impact the ability of the Registrants to operate and could adversely affect financial results and liquidity.
Information security risks have generally increased in recent years as a result of the proliferation of new technology and increased sophistication and frequency of cyber attacks and data security breaches. The Subsidiary Registrants operate in highly regulated industries that require the continued operation of sophisticated IT systems and network infrastructure, which are part of interconnected distribution systems. Because of the critical nature of the infrastructure, increased connectivity to the internet, and technology systems' inherent vulnerability to disability or failures due to hacking, viruses, acts of war or terrorism, or other types of data security breaches, the Southern Company system faces a heightened risk of cyberattack. Parties that wish to disrupt the U.S. bulk power system or Southern Company system operations could view these computer systems, software, or networks as targets. The Registrants and their third-party vendors have been subject, and will likely continue to be subject, to attempts to gain unauthorized access to their IT systems and confidential data or to attempts to disrupt utility operations. As a result, Southern Company and its subsidiaries face on-going threats to their assets, including assets deemed critical infrastructure, where databases and systems have been, and will likely continue to be, subject to advanced computer viruses or other malicious codes, unauthorized access attempts, phishing, and other cyber attacks. While there have been immaterial incidents of phishing and attempted financial fraud across the Southern Company system, there has been no material impact on business or operations from these attacks. However, the Registrants cannot guarantee that security efforts will prevent breaches, operational incidents, or other breakdowns of IT systems and network infrastructure and cannot provide any assurance that such incidents will not have a material adverse effect in the future.
In addition, in the ordinary course of business, Southern Company and its subsidiaries collect and retain sensitive information, including personally identifiable information about customers, employees, and stockholders, and other confidential information. In some cases, administration of certain functions may be outsourced to third-party service providers that could also be targets of cyber attacks.
Despite the implementation of robust security measures, all assets are potentially vulnerable to internal or external cyber attacks, which may inhibit the affected Registrant's ability to fulfill critical business functions and compromise sensitive and other data. Any cyber breach or theft, damage, or improper disclosure of sensitive electronic data may also subject the affected Registrant to penalties and claims from regulators or other third parties. Moreover, the amount and scope of insurance may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result. In addition, as cybercriminals become more sophisticated, the cost of proactive defensive measures may increase.
These events could negatively affect the financial results of the Registrants through lost revenues, costs to recover and repair damage, costs associated with governmental actions in response to such attacks, and litigation costs if such costs cannot be recovered through insurance or otherwise.
The Southern Company system may not be able to obtainadequate natural gas, fuel supplies, and other resources required to operate the traditional electric operating companies' and Southern Power's electric generating plants or serve Southern Company Gas' natural gas customers.
The traditional electric operating companies and Southern Power purchase fuel from a number of suppliers. The traditional electric operating companies and Southern Power also need adequate access to water, which is drawn from nearby sources, to aid in the production of electricity and, once it is used, returned to its source. Disruption in the delivery of fuel, including disruptions as a result of, among other things, transportation delays, weather, labor relations, force majeure events, or environmental regulations affecting fuel suppliers, or the availability of water, could limit the ability of the traditional electric operating companies and Southern Power to operate certain facilities, which could result in higher fuel and operating costs and potentially reduce the net income of the affected traditional electric operating company or Southern Power and Southern Company.
Natural gas supplies can be subject to disruption in the event production or distribution is curtailed, such as in the event of a hurricane or a pipeline failure. The Southern Company system also relies on natural gas pipelines and other storage and transportation facilities owned and operated by third parties to deliver natural gas to wholesale markets and to its distribution
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systems. The availability of shale gas and potential regulations affecting its accessibility may have a material impact on the supply and cost of natural gas. Disruption in natural gas supplies could limit the ability to fulfill contractual obligations.
The traditional electric operating companies and Southern Power have become more dependent on natural gas for a majority of their electric generating capacity and expect to continue to increase such dependence. In many instances, the cost of purchased power is influenced by natural gas prices. Historically, natural gas prices have been more volatile than prices of other fuels. In recent years, domestic natural gas prices have been depressed by robust supplies, including production from shale gas. These market conditions, together with additional regulation of coal-fired generating units, have increased the traditional electric operating companies' reliance on natural gas-fired generating units.
The traditional electric operating companies are also dependent on coal for a portion of their electric generating capacity. The traditional electric operating companies depend on coal supply contracts, and the counterparties to these agreements may not fulfill their obligations to supply coal because of financial or technical problems. In addition, the suppliers may not be required to supply coal under certain circumstances, such as in the event of a natural disaster. If the traditional electric operating companies are unable to obtain their contracted coal requirements, they may be required to purchase their coal requirements at higher prices, which may not be recoverable through rates.
The revenues of Southern Company, the traditional electric operating companies, and SouthernPower depend inpart on sales under PPAs. The failure of a PPA counterparty toperform its obligations, the failure of a Southern Company subsidiary to satisfy minimum requirements under the PPAs, or the failure to renew the PPAs or successfully remarket the related generating capacity could have a negativeimpact on the net income and cash flows of the affected traditional electric operating companyor Southern Power and/or of Southern Company.
Most of Southern Power's generating capacity has been sold to purchasers under PPAs. Southern Power's top three customers, Georgia Power, Southern California Edison, and Morgan Stanley Capital Group accounted for 9.0%, 6.8%, and 4.9%, respectively, of Southern Power's total revenues for the year ended December 31, 2019. The traditional electric operating companies have entered into PPAs with non-affiliated parties.
The revenues related to PPAs are dependent on the continued performance by the purchasers of their obligations. The failure of a purchaser to perform its obligations, including as a result of a general default or bankruptcy, could have a negative impact on the net income and cash flows of the affected traditional electric operating company or Southern Power and of Southern Company. Although the credit evaluations undertaken and contractual protections implemented by Southern Power and the traditional electric operating companies take into account the possibility of default by a purchaser, actual exposure to a default by a purchaser may be greater than predicted or specified in the applicable contract. See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in Item 8 herein for additional information on the potential impacts of Pacific Gas & Electric Company's bankruptcy filing.
Additionally, neither Southern Power nor any traditional electric operating company can predict whether the PPAs will be renewed at the end of their respective terms or on what terms any renewals may be made. The failure of a Southern Company subsidiary to satisfy minimum operational or availability requirements under these PPAs, including PPAs related to fuel cell technology, could result in payment of damages or termination of the PPAs.
The asset management arrangements between Southern Company Gas' wholesale gas services and its customers, including the natural gas distribution utilities, may not be renewed or may be renewed at lower levels, which could have a significant impact on Southern Company Gas' financial results.
Southern Company Gas' wholesale gas services currently manages the storage and transportation assets of the natural gas distribution utilities (except Nicor Gas) as well as certain non-affiliated customers. Southern Company Gas' wholesale gas services has a concentration of credit risk for services it provides to its counterparties, which is generally concentrated in 20 of its counterparties.
The profits earned from the management of affiliate assets are shared with the respective affiliate's customers (and for Atlanta Gas Light with the Georgia PSC's Universal Service Fund), except for Chattanooga Gas where wholesale gas services are provided under annual fixed-fee agreements. These asset management agreements are subject to regulatory approval and such agreements may not be renewed or may be renewed with less favorable terms.
The financial results of Southern Company Gas' wholesale gas services could be significantly impacted if any of its agreements with its affiliated or non-affiliated customers are not renewed or are amended or renewed with less favorable terms. Sustained low natural gas prices could reduce the demand for these types of asset management arrangements.
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Increased competition from other companies that supply energy or generation and storage technologies could negatively impact Southern Company's and its subsidiaries' revenues, results of operations, and financial condition.
A key element of the business models of the traditional electric operating companies and Southern Power is that generating power at central station power plants achieves economies of scale and produces power at a competitive cost. Advances in technology or changes in laws or regulations could reduce the cost of distributed generation storage technologies or other alternative methods of producing power to a level that is competitive with that of most central station power electric production or result in smaller-scale, more fuel efficient, and/or more cost effective distributed generation that allows for increased self-generation by customers. Broader use of distributed generation by retail energy customers may also result from customers' changing perceptions of the merits of utilizing existing generation technology or tax or other economic incentives. Additionally, a state PSC or legislature may modify certain aspects of the traditional electric operating companies' business as a result of these advances in technology.
It is also possible that rapid advances in central station power generation technology could reduce the value of the current electric generating facilities owned by the traditional electric operating companies and Southern Power. Changes in technology could also alter the channels through which electric customers buy or utilize power, which could reduce the revenues or increase the expenses of Southern Company, the traditional electric operating companies, or Southern Power.
Southern Company Gas' business is dependent on natural gas prices remaining competitive as compared to other forms of energy. Southern Company Gas' gas marketing services segment also is affected by competition from other energy marketers providing similar services in Southern Company Gas' unregulated service territories, most notably in Illinois and Georgia. Southern Company Gas' wholesale gas services competes for sales with national and regional full-service energy providers, energy merchants and producers, and pipelines based on the ability to aggregate competitively-priced commodities with transportation and storage capacity. Southern Company Gas competes with natural gas facilities in the Gulf Coast region of the U.S., as the majority of the existing and proposed high deliverability salt-dome natural gas storage facilities in North America are located in the Gulf Coast region.
If new technologies become cost competitive and achieve sufficient scale, the market share of the Subsidiary Registrants could be eroded, and the value of their respective electric generating facilities or natural gas distribution and storage facilities could be reduced. Additionally, Southern Company Gas' market share could be reduced if Southern Company Gas cannot remain price competitive in its unregulated markets. If state PSCs or other applicable state regulatory agencies fail to adjust rates to reflect the impact of any changes in loads, increasing self-generation, and the growth of distributed generation, the financial condition, results of operations, and cash flows of Southern Company and the affected traditional electric operating company or Southern Company Gas could be materially adversely affected.
Failure to attract and retain an appropriately qualified workforce could negatively impact Southern Company's and its subsidiaries' results of operations.
Events such as an aging workforce without appropriate replacements, mismatch of skill sets to future needs, or unavailability of contract resources may lead to operating challenges such as lack of resources, loss of knowledge, and a lengthy time period associated with skill development, including with the workforce needs associated with major construction projects and ongoing operations. The Southern Company system's costs, including costs for contractors to replace employees, productivity costs, and safety costs, may rise. Failure to hire and adequately obtain replacement employees, including the ability to transfer significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect Southern Company and its subsidiaries' ability to manage and operate their businesses.
As a result of the increased demand for skilled linemen in California and the Northeast, portions of the Southern Company system experienced higher than normal turnover in 2019. The Southern Company system is diligently working to attract and train qualified linemen.
If Southern Company and its subsidiaries are unable to successfully attract and retain an appropriately qualified workforce, results of operations could be negatively impacted.
CONSTRUCTION RISKS
The Registrants have incurred and may incuradditional costs or delays in the construction of new plants or other facilities and may not be able to recover their investments. Also, existing facilities ofthe Subsidiary Registrants requireongoing expenditures, including those to meet AROs and other environmental standards and goals.
General
The businesses of the Registrants require substantial expenditures for investments in new facilities and, for the traditional electric operating companies, capital improvements to transmission, distribution, and generation facilities, for Southern Power, capital improvements to generation facilities, and, for Southern Company Gas, capital improvements to natural gas distribution
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and storage facilities. These expenditures also include those to settle AROs and meet environmental standards and goals. The traditional electric operating companies and Southern Power are in the process of constructing new generating facilities and adding environmental modifications to certain existing generating facilities. The traditional electric operating companies also are in the process of closing ash ponds to comply with the CCR Rule and, where applicable, state CCR rules. Southern Company Gas is replacing certain pipelines in its natural gas distribution system and is involved in two new gas pipeline construction projects. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations. These projects are long term in nature and in some cases may include the development and construction of facilities with designs that have not been finalized or previously constructed. The completion of these types of projects without delays or significant cost overruns is subject to substantial risks that have occurred or may occur, including:
shortages, delays, increased costs, or inconsistent quality of equipment, materials, and labor;
challenges with management of contractors, subcontractors, or vendors;
work stoppages;
contractor or supplier delay;
nonperformance under construction, operating, or other agreements;
delays in or failure to receive necessary permits, approvals, tax credits, and other regulatory authorizations;
challenges with start-up activities (including major equipment failure, system integration, or regional transmission upgrades) and/or operational performance;
operational readiness, including specialized operator training and required site safety programs;
impacts of new and existing laws and regulations, including environmental laws and regulations;
the outcome of any legal challenges to projects, including legal challenges to regulatory approvals;
failure to construct in accordance with permits and licenses (including satisfaction of NRC requirements);
failure to satisfy any environmental performance standards and the requirements of tax credits and other incentives;
continued public and policymaker support for projects;
adverse weather conditions or natural disasters;
engineering or design problems;
design and other licensing-based compliance matters;
environmental and geological conditions;
delays or increased costs to interconnect facilities to transmission grids; and
increased financing costs as a result of changes in market interest rates or as a result of project delays.
If a Subsidiary Registrant is unable to complete the development or construction of a project or decides to delay or cancel construction of a project, it may not be able to recover its investment in that project and may incur substantial cancellation payments under equipment purchase orders or construction contracts, as well as other costs associated with the closure and/or abandonment of the construction project.
In addition, partnership and joint ownership agreements may provide partners or co-owners with certain decision-making authority in connection with projects under construction, including rights to cause the cancellation of a construction project under certain circumstances. Any failure by a partner or co-owner to perform its obligations under the applicable agreements could have a material negative impact on the applicable project under construction. Certain Southern Company Gas pipeline development projects involve separate joint venture participants that own a majority of the project, Southern Power participates in partnership agreements with respect to a majority of its renewable energy projects, Georgia Power jointly owns Plant Vogtle Units 3 and 4 with other co-owners, and Mississippi Power jointly owns Plant Daniel with Gulf Power. See Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information regarding jointly-owned facilities.
If construction projects are not completed according to specification, a Registrant may incur liabilities and suffer reduced plant efficiency, higher operating costs, and reduced net income. Furthermore, construction delays associated with renewable projects could result in the loss of otherwise available tax credits and incentives.
Even if a construction project (including a joint venture construction project) is completed, the total costs may be higher than estimated and may not be recoverable through regulated rates, if applicable. In addition, construction delays and contractor performance shortfalls can result in the loss of revenues and may, in turn, adversely affect the net income and financial position of the affected Registrant. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. Southern Company and Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in 2018 to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See Note 2 to the financial statements under "Georgia Power – Nuclear Construction" in Item 8 herein for information regarding Plant Vogtle Units 3 and 4. Also see Note 3 to the financial statements under "Other MattersSouthern Company
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GasGas Pipeline Projects" for information regarding the construction delays and the associated cost increases for Southern Company Gas' pipeline construction projects and Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding the proposed sale of Southern Company Gas' interests in Atlantic Coast Pipeline.
Once facilities become operational, ongoing capital expenditures are required to maintain reliable levels of operation. Significant portions of the traditional electric operating companies' existing facilities were constructed many years ago. Older equipment, even if maintained in accordance with good engineering practices, may require significant expenditures to maintain efficiency, to comply with changing environmental requirements, to provide safe and reliable operations, and/or to meet related retirement obligations.
Southern Company Gas' significant investments in pipelines and pipeline development projects involve financial and execution risks.
Southern Company Gas has made significant investments in existing pipelines and pipeline development projects. Many of the existing pipelines are, and, when completed, the pipeline development projects will be, operated by third parties. If one of these agents fails to perform in a proper manner, the value of the investment could decline and Southern Company Gas could lose part or all of its investment. In addition, Southern Company Gas is required to fulfill capital obligations to pipeline joint ventures or, as necessary, guarantee the obligations of such joint venture.
With respect to certain pipeline development projects, Southern Company Gas will rely on its joint venture partners for construction management and will not exercise direct control over the process. All of the pipeline development projects are dependent on contractors for the successful and timely completion of the projects. Further, the development of pipeline projects involves numerous regulatory, environmental, construction, safety, political, and legal uncertainties and may require the expenditure of significant amounts of capital. These projects may not be completed on schedule, at the budgeted cost, or at all. There may be cost overruns and construction difficulties that cause Southern Company Gas' capital expenditures to exceed its initial expectations, which may impact the earnings of the joint venture partnerships. Moreover, Southern Company Gas' income will not increase immediately upon the expenditure of funds on a pipeline project. Pipeline construction occurs over an extended period of time and Southern Company Gas will not receive material increases in income until the project is placed in service.
At December 31, 2019, Southern Company Gas was involved in two gas pipeline development projects, the Atlantic Coast Pipeline project and the PennEast Pipeline project. See Note 3 to the financial statements under "Other Matters – Southern Company Gas – Gas Pipeline Projects" in Item 8 herein for information regarding these projects and Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding the proposed sale of Southern Company Gas' interests in Atlantic Coast Pipeline.
FINANCIAL, ECONOMIC, AND MARKET RISKS
The electric generation and energy marketing operations of the traditional electric operating companies and Southern Power and the natural gas operations of Southern Company Gas are subject to risks, many of which are beyondtheir control, including changes in energy prices and fuel costs, which may reduce revenues and increase costs.
The generation, energy marketing, and natural gas operations of the Southern Company system are subject to changes in energy prices and fuel costs, which could increase the cost of producing power, decrease the amount received from the sale of energy, and/or make electric generating facilities less competitive. The market prices for these commodities may fluctuate significantly over relatively short periods of time. Among the factors that could influence energy prices and fuel costs are:
prevailing market prices for coal, natural gas, uranium, fuel oil, and other fuels, as applicable, used in the generation facilities of the traditional electric operating companies and Southern Power and, in the case of natural gas, distributed by Southern Company Gas, including associated transportation costs, and supplies of such commodities;
demand for energy and the extent of additional supplies of energy available from current or new competitors;
liquidity in the general wholesale electricity and natural gas markets;
weather conditions impacting demand for electricity and natural gas;
seasonality;
transmission or transportation constraints, disruptions, or inefficiencies;
availability of competitively priced alternative energy sources;
forced or unscheduled plant outages for the Southern Company system, its competitors, or third party providers;
the financial condition of market participants;
the economy in the Southern Company system's service territory, the nation, and worldwide, including the impact of economic conditions on demand for electricity and the demand for fuels, including natural gas;
natural disasters, wars, embargos, physical or cyber attacks, and other catastrophic events; and
federal, state, and foreign energy and environmental regulation and legislation.
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These factors could increase the expenses and/or reduce the revenues of the Registrants. For the traditional electric operating companies and Southern Company Gas' regulated gas distribution operations, such impacts may not be fully recoverable through rates.
Historically, the traditional electric operating companies and Southern Company Gas from time to time have experienced underrecovered fuel and/or purchased gas cost balances and may experience such balances in the future. While the traditional electric operating companies and Southern Company Gas are generally authorized to recover fuel and/or purchased gas costs through cost recovery clauses, recovery may be denied if costs are deemed to be imprudently incurred and there may be delays in the authorization of such recovery. These factors could negatively impact the cash flows of the affected traditional electric operating company or Southern Company Gas and of Southern Company.
The Registrants are subject to risks associated with a changing economic environment, customer behaviors, including increased energy conservation, and adoption patterns of technologies by the customers of the Subsidiary Registrants.
The consumption and use of energy are linked to economic activity. This relationship is affected over time by changes in the economy, customer behaviors, and technologies. Any economic downturn could negatively impact customer growth and usage per customer, thus reducing the sales of energy and revenues. Additionally, any economic downturn or disruption of financial markets, both nationally and internationally, could negatively affect the financial stability of customers and counterparties of the Subsidiary Registrants.
Outside of economic disruptions, changes in customer behaviors in response to energy efficiency programs, changing conditions and preferences, or changes in the adoption of technologies could affect the relationship of economic activity to the consumption of energy. For example, some cities in the United States recently banned the use of natural gas in new construction.
Both federal and state programs exist to influence how customers use energy, and several of the traditional electric operating companies and Southern Company Gas have PSC or other applicable state regulatory agency mandates to promote energy efficiency. Conservation programs could impact the financial results of the Registrants in different ways. For example, if any traditional electric operating company or Southern Company Gas is required to invest in conservation measures that result in reduced sales from effective conservation, regulatory lag in adjusting rates for the impact of these measures could have a negative financial impact on such traditional electric operating company or Southern Company Gas and Southern Company. Customers could also voluntarily reduce their consumption of energy in response to decreases in their disposable income, increases in energy prices, or individual conservation efforts.
In addition, the adoption of technology by customers can have both positive and negative impacts on sales. Many new technologies utilize less energy than in the past. However, electric and natural gas technologies such as electric and natural gas vehicles can create additional demand. The Southern Company system uses best available methods and experience to incorporate the effects of changes in customer behavior, state and federal programs, PSC or other applicable state regulatory agency mandates, and technology, but the Southern Company system's planning processes may not estimate and incorporate these effects.
All of the factors discussed above could adversely affect a Registrant's results of operations, financial condition, and liquidity.
The operating results of the Registrants are affected by weather conditions and may fluctuate on a seasonal basis. In addition, catastrophic events could result in substantial damage to or limit the operation of the properties of a Subsidiary Registrant and could negatively impact results of operation, financial condition, and liquidity.
Electric power and natural gas supply are generally seasonal businesses. In the aggregate, during normal weather conditions, the Southern Company system's electric power sales peak during both the summer and winter. Additionally, Southern Power has variability in its revenues from renewable generation facilities due to seasonal weather patterns primarily from wind and sun. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. In addition, the Subsidiary Registrants have historically sold less power and natural gas when weather conditions are milder. Unusually mild weather in the future could reduce the revenues, net income, and available cash of the affected Registrant.
Volatile or significant weather events could result in substantial damage to the transmission and distribution lines of the traditional electric operating companies, the generating facilities of the traditional electric operating companies and Southern Power, and the natural gas distribution and storage facilities of Southern Company Gas. The Subsidiary Registrants have significant investments in the Atlantic and Gulf Coast regions and Southern Power and Southern Company Gas have investments in various states which could be subject to severe weather and natural disasters, including hurricanes and wildfires. Further, severe drought conditions can reduce the availability of water and restrict or prevent the operation of certain generating facilities.
In the event a traditional electric operating company or Southern Company Gas experiences any of these weather events or any natural disaster or other catastrophic event, recovery of costs in excess of reserves and insurance coverage is subject to the
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approval of its state PSC or other applicable state regulatory agency. Historically, the traditional electric operating companies from time to time have experienced deficits in their storm cost recovery reserve balances and may experience such deficits in the future. Any denial by the applicable state PSC or other applicable state regulatory agency or delay in recovery of any portion of such costs could have a material negative impact on a traditional electric operating company's or Southern Company Gas' and on Southern Company's results of operations, financial condition, and liquidity.
In addition, damages resulting from significant weather events within the service territory of any traditional electric operating company or Southern Company Gas or affecting Southern Power's customers may result in the loss of customers and reduced demand for energy for extended periods and may impact customers' ability to perform under existing PPAs. See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing. Any significant loss of customers or reduction in demand for energy could have a material negative impact on a Registrant's results of operations, financial condition, and liquidity.
Acquisitions, dispositions, or other strategic ventures or investments may not result in anticipated benefits and may present risks not originally contemplated, which may have a material adverse effect on the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
Southern Company and its subsidiaries have made significant acquisitions and investments in the past, as well as dispositions, and may in the future make additional acquisitions, dispositions, or other strategic ventures or investments, including the pending disposition by Southern Company Gas of its interests in Pivotal LNG and Atlantic Coast Pipeline, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries. Southern Company and its subsidiaries continually seek opportunities to create value through various transactions, including acquisitions or sales of assets. Specifically, Southern Power continually seeks opportunities to execute its strategy to create value through various transactions, including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Southern Company and its subsidiaries may face significant competition for transactional opportunities and anticipated transactions may not be completed on acceptable terms or at all. In addition, these transactions are intended to, but may not, result in the generation of cash or income, the realization of savings, the creation of efficiencies, or the reduction of risk. These transactions may also affect the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
These transactions also involve risks, including:
they may not result in an increase in income or provide adequate or expected funds or return on capital or other anticipated benefits;
they may result in Southern Company or its subsidiaries entering into new or additional lines of business, which may have new or different business or operational risks;
they may not be successfully integrated into the acquiring company's operations and/or internal control processes;
the due diligence conducted prior to a transaction may not uncover situations that could result in financial or legal exposure or may not appropriately evaluate the likelihood or quantify the exposure from identified risks;
they may result in decreased earnings, revenues, or cash flow;
they may involve retained obligations in connection with transitional agreements or deferred payments related to dispositions that subject Southern Company or its subsidiaries to additional risk;
Southern Company or the applicable subsidiary may not be able to achieve the expected financial benefits from the use of funds generated by any dispositions;
expected benefits of a transaction may be dependent on the cooperation, performance, or credit risk of a counterparty; or
for the traditional electric operating companies and Southern Company Gas, costs associated with such investments that were expected to be recovered through regulated rates may not be recoverable.
Southern Company and Southern Company Gas are holding companies and Southern Power owns many of its assets indirectly through subsidiaries. Each of these companies is dependent on cash flows from their respective subsidiaries to meet their ongoing and future financial obligations, including making interest and principal payments on outstanding indebtedness and, for Southern Company, to pay dividends on its common stock.
Southern Company and Southern Company Gas are holding companies and, as such, they have no operations of their own. Substantially all of Southern Company's and Southern Company Gas' and many of Southern Power's respective consolidated assets are held by subsidiaries. Southern Company's, Southern Company Gas' and, to a certain extent, Southern Power's ability to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and, for Southern Company, to pay dividends on its common stock, is dependent on the net income and cash flows of their
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respective subsidiaries and the ability of those subsidiaries to pay upstream dividends or to repay borrowed funds. Prior to funding Southern Company, Southern Company Gas, or Southern Power, the respective subsidiaries have financial obligations and, with respect to Southern Company and Southern Company Gas, regulatory restrictions that must be satisfied, including among others, debt service and preferred stock dividends. In addition, Southern Company, Southern Company Gas, and Southern Power may provide capital contributions or debt financing to subsidiaries under certain circumstances, which would reduce the funds available to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and to pay dividends on Southern Company's common stock.
A downgrade in the credit ratings of any of the Registrants, Southern Company Gas Capital, or Nicor Gas could negatively affect their ability to access capital at reasonable costs and/or could require posting of collateral or replacing certain indebtedness.
There are a number of factors that rating agencies evaluate to arrive at credit ratings for the Registrants, Southern Company Gas Capital, and Nicor Gas, including capital structure, regulatory environment, the ability to cover liquidity requirements, and other commitments for capital. The Registrants, Southern Company Gas Capital, and Nicor Gas could experience a downgrade in their ratings if any rating agency concludes that the level of business or financial risk of the industry or the applicable company has deteriorated. Changes in ratings methodologies by the agencies could also have a negative impact on credit ratings. If one or more rating agencies downgrade any Registrant, Southern Company Gas Capital, or Nicor Gas borrowing costs likely would increase, including automatic increases in interest rates under applicable term loans and credit facilities, the pool of investors and funding sources would likely decrease, and, particularly for any downgrade to below investment grade, significant collateral requirements may be triggered in a number of contracts. Any credit rating downgrades could require altering the mix of debt financing currently used, and could require the issuance of secured indebtedness and/or indebtedness with additional restrictive covenants binding the applicable company.
Uncertainty in demand for energy can result in lower earnings or higher costs. If demand for energy falls short of expectations, it could result in potentially stranded assets. If demand for energy exceeds expectations, it could result in increased costs forpurchasing capacity in the open market or building additional electric generation and transmissionfacilities or natural gas distribution and storage facilities.
Southern Company, the traditional electric operating companies, and Southern Power each engage in a long-term planning process to estimate the optimal mix and timing of new generation assets required to serve future load obligations. Southern Company Gas engages in a long-term planning process to estimate the optimal mix and timing of building new pipelines and storage facilities, replacing existing pipelines, rewatering storage facilities, and entering new markets and/or expanding in existing markets. These planning processes must look many years into the future in order to accommodate the long lead times associated with the permitting and construction of new generation and associated transmission facilities and natural gas distribution and storage facilities. Inherent risk exists in predicting demand as future loads are dependent on many uncertain factors, including economic conditions, customer usage patterns, efficiency programs, and customer technology adoption. Because regulators may not permit the traditional electric operating companies or Southern Company Gas' regulated operating companies to adjust rates to recover the costs of new generation and associated transmission assets and/or new pipelines and related infrastructure in a timely manner or at all, these subsidiaries may not be able to fully recover these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs and the recovery in customers' rates. In addition, under Southern Power's model of selling capacity and energy at negotiated market-based rates under long-term PPAs, Southern Power might not be able to fully execute its business plan if market prices drop below original forecasts. Southern Power and/or the traditional electric operating companies may not be able to extend existing PPAs or find new buyers for existing generation assets as existing PPAs expire, or they may be forced to market these assets at prices lower than originally intended. These situations could have negative impacts on net income and cash flows for the affected Registrant.
The traditional electric operating companies are currently obligated to supply power to retail customers and wholesale customers under long-term PPAs. Southern Power is currently obligated to supply power to wholesale customers under long-term PPAs. At peak times, the demand for power required to meet this obligation could exceed the Southern Company system's available generation capacity. Market or competitive forces may require that the traditional electric operating companies purchase capacity on the open market or build additional generation and transmission facilities and that Southern Power purchase energy or capacity on the open market. Because regulators may not permit the traditional electric operating companies to pass all of these purchase or construction costs on to their customers, the traditional electric operating companies may not be able to recover some or all of these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs of purchased or constructed capacity and the traditional electric operating companies' recovery in customers' rates. Under Southern Power's long-term fixed price PPAs, Southern Power may not be able to recover all of these costs. These situations could have negative impacts on net income and cash flows for the affected Registrant.
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The businesses of the Registrants, SEGCO, and Nicor Gas are dependent on their ability to successfully access funds through capital markets and financial institutions. Theinability of any of the Registrants, SEGCO, or Nicor Gas to access funds may limit its ability to execute its business plan by impacting its ability to fund capital investments or acquisitions that it may otherwise rely on to achieve future earnings and cash flows.
The Registrants, SEGCO, and Nicor Gas rely on access to both short-term money markets and longer-term capital markets as a significant source of liquidity for capital requirements not satisfied by the cash flow from their respective operations. If any of the Registrants, SEGCO, or Nicor Gas is not able to access capital at competitive rates or on favorable terms, its ability to implement its business plan will be limited by impacting its ability to fund capital investments or acquisitions that it may otherwise rely on to achieve future earnings and cash flows. In addition, the Registrants, SEGCO, and Nicor Gas rely on committed bank lending agreements as back-up liquidity which allows them to access low cost money markets. Each of the Registrants, SEGCO, and Nicor Gas believes that it will maintain sufficient access to these financial markets based upon current credit ratings. However, certain events or market disruptions may increase the cost of borrowing or adversely affect the ability to raise capital through the issuance of securities or other borrowing arrangements or the ability to secure committed bank lending agreements used as back-up sources of capital. Such disruptions could include an economic downturn or uncertainty; bankruptcy or financial distress at an unrelated energy company, financial institution, or sovereign entity; capital markets volatility and disruption, either nationally or internationally; changes in tax policy; volatility in market prices for electricity and natural gas; actual or threatened cyber or physical attacks on the Southern Company system's facilities or unrelated energy companies' facilities; war or threat of war; or the overall health of the utility and financial institution industries.
Additionally, due to a portion of the Registrants' indebtedness bearing interest at fluctuating rates based on LIBOR or other benchmark rates, the potential phasing out of these rates may adversely affect the costs of financing. The discontinuation, reform, or replacement of LIBOR or any other benchmark rates may have an unpredictable impact on contractual relationships in the credit markets or cause disruption to the broader financial markets and could result in adverse consequences to the return on, value of, and market for the Registrants' securities and other instruments whose returns are linked to any such benchmark.
Failure to comply with debt covenants or conditions could adversely affect the ability of the Registrants, SEGCO, Southern Company Gas Capital, or Nicor Gas to execute future borrowings.
The debt and credit agreements of the Registrants, SEGCO, Southern Company Gas Capital, and Nicor Gas contain various financial and other covenants. Georgia Power's loan guarantee agreement with the DOE contains additional covenants, events of default, and mandatory prepayment events relating to the construction of Plant Vogtle Units 3 and 4. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements, which would negatively affect the applicable company's financial condition and liquidity.
Volatility in the securities markets, interest rates, and other factors could substantially increase defined benefit pension and other postretirement plan costs and the funding available for nuclear decommissioning.
The costs of providing pension and other postretirement benefit plans are dependent on a number of factors, such as the rates of return on plan assets, discount rates, the level of interest rates used to measure the required minimum funding levels of the plan, changes in actuarial assumptions, government regulations, and/or life expectancy, and the frequency and amount of the Southern Company system's required or voluntary contributions made to the plans. Changes in actuarial assumptions and differences between the assumptions and actual values, as well as a significant decline in the value of investments that fund the pension and other postretirement plans, if not offset or mitigated by a decline in plan liabilities, could increase pension and other postretirement expense, and the Southern Company system could be required from time to time to fund the pension plans with significant amounts of cash. Such cash funding obligations could have a material impact on liquidity by reducing cash flows and could negatively affect results of operations. See MANAGEMENT'S DISCUSSION AND ANALYSIS – ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Pension and Other Postretirement Benefits" in Item 7 herein and Note 11 to the financial statements in Item 8 herein for additional information regarding the defined benefit pension and other postretirement plans. Additionally, Alabama Power and Georgia Power each hold significant assets in their nuclear decommissioning trusts to satisfy obligations to decommission their nuclear plants. The rate of return on assets held in those trusts can significantly impact both the funding available for decommissioning and the funding requirements for the trusts. See Note 6 to the financial statements under "Nuclear Decommissioning" in Item 8 herein for additional information.
The Registrants are subject to risks associated with their ability to obtain adequate insurance at acceptable costs.
The financial condition of some insurance companies, actual or threatened physical or cyber attacks, and natural disasters, among other things, could have disruptive effects on insurance markets. The availability of insurance may decrease, and the insurance that the Registrants are able to obtain may have higher deductibles, higher premiums, and more restrictive policy terms. Further, the insurance policies may not cover all of the potential exposures or the actual amount of loss incurred.
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Any losses not covered by insurance, or any increases in the cost of applicable insurance, could adversely affect the results of operations, cash flows, or financial condition of the affected Registrant.
The use of derivative contracts by Southern Company and its subsidiaries in thenormal course of business could result in financial losses that negatively impact thenet income of the Registrants or in reported net income volatility.
Southern Company and its subsidiaries use derivative instruments, such as swaps, options, futures, and forwards, to manage their commodity and interest rate exposures and, to a lesser extent, manage foreign currency exchange rate exposure and engage in limited trading activities. The Registrants could recognize financial losses as a result of volatility in the market values of these contracts or if a counterparty fails to perform. These risks are managed through risk management policies, limits, and procedures, which might not work as planned and cannot entirely eliminate the risks associated with these activities. In addition, derivative contracts entered into for hedging purposes might not offset the underlying exposure being hedged as expected, resulting in financial losses. In the absence of actively quoted market prices and pricing information from external sources, the valuation of these financial instruments can involve management's judgment or use of estimates. The factors used in the valuation of these instruments become more difficult to predict and the calculations become less reliable further into the future. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.
In addition, Southern Company Gas utilizes derivative instruments to lock in economic value in wholesale gas services, which may not qualify as, or may not be designated as, hedges for accounting purposes. The difference in accounting treatment for the underlying position and the financial instrument used to hedge the value of the contract can cause volatility in reported net income of Southern Company and Southern Company Gas while the positions are open due to mark-to-market accounting.
See Notes 13 and 14 to the financial statements in Item 8 herein for additional information.
Future impairments of goodwill or long-lived assets could have a material adverse effect on the Registrants' results of operations.
Goodwill is assessed for impairment at least annually and more frequently if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value and long-lived assets are assessed for impairment whenever events or circumstances indicate that an asset's carrying amount may not be recoverable. In connection with the completion of the Merger, the application of the acquisition method of accounting was pushed down to Southern Company Gas. The excess of the purchase price over the fair values of Southern Company Gas' assets and liabilities was recorded as goodwill. This resulted in a significant increase in the goodwill recorded on Southern Company's and Southern Company Gas' consolidated balance sheets. At December 31, 2019, goodwill was $5.3 billion and $5.0 billion for Southern Company and Southern Company Gas, respectively.
In addition, Southern Company and its subsidiaries have long-lived assets recorded on their balance sheets. To the extent the value of goodwill or long-lived assets become impaired, the affected Registrant may be required to incur impairment charges that could have a material impact on their results of operations. For example, Southern Company Gas has two natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either of these natural gas storage facilities. See Note 3 to the financial statements under "Other Matters" in Item 8 herein for information regarding certain impairment charges at Southern Company and Southern Company Gas.
Item 1B.UNRESOLVED STAFF COMMENTS.
None.
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Item 2. PROPERTIES
Electric
Electric Properties
The traditional electric operating companies, Southern Power, and SEGCO, at December 31, 2019, owned and/or operated 30 hydroelectric generating stations, 24 fossil fuel generating stations, three nuclear generating stations, 13 combined cycle/cogeneration stations, 42 solar facilities, 10 wind facilities, one fuel cell facility, and one battery storage facility. The amounts of capacity for each company at December 31, 2019 are shown in the table below. The traditional electric operating companies have certain jointly-owned generating stations. For these facilities, the nameplate capacity shown represents the Registrant's portion of total plant capacity, with ownership percentages provided if less than 100%.
Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

(KWs)
FOSSIL STEAM
GadsdenGadsden, AL120,000
BarryMobile, AL1,300,000
Greene County (60%)Demopolis, AL300,000
Gaston Unit 5Wilsonville, AL880,000
Miller (95.92%)Birmingham, AL2,532,288
Alabama Power Total5,132,288
BowenCartersville, GA3,160,000
Scherer (8.4% of Units 1 and 2 and 75% of Unit 3)Macon, GA750,924
Wansley (53.5%)Carrollton, GA925,550
YatesNewnan, GA700,000
Georgia Power Total5,536,474
Daniel (50%)Pascagoula, MS500,000
Greene County (40%)Demopolis, AL200,000
WatsonGulfport, MS750,000
Mississippi Power Total1,450,000
Gaston Units 1-4Wilsonville, AL
SEGCO Total1,000,000
(b)
Total Fossil Steam13,118,762
NUCLEAR STEAM
FarleyDothan, AL
Alabama Power Total1,720,000
Hatch (50.1%)Baxley, GA899,612
Vogtle Units 1 and 2 (45.7%)Augusta, GA1,060,240
Georgia Power Total1,959,852
Total Nuclear Steam3,679,852
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

COMBUSTION TURBINES
Greene CountyDemopolis, AL
Alabama Power Total720,000
BoulevardSavannah, GA19,700
McDonough Unit 3Atlanta, GA78,800
McIntosh Units 1 through 8Effingham County, GA640,000
McManusBrunswick, GA481,700
RobinsWarner Robins, GA158,400
Wansley (53.5%)Carrollton, GA26,322
WilsonAugusta, GA354,100
Georgia Power Total1,759,022
SweattMeridian, MS39,400
WatsonGulfport, MS39,360
Mississippi Power Total78,760
AddisonThomaston, GA668,800
Cleveland CountyCleveland County, NC720,000
DahlbergJackson County, GA756,000
RowanSalisbury, NC455,250
Southern Power Total2,600,050
Gaston (SEGCO)
Wilsonville, AL19,680
(b)
Total Combustion Turbines5,177,512
COGENERATION
Washington CountyWashington County, AL123,428
Lowndes CountyBurkeville, AL104,800
TheodoreTheodore, AL236,418
Alabama Power Total464,646
Chevron Cogenerating StationPascagoula, MS147,292
(c)
Mississippi Power Total147,292
Total Cogeneration611,938
COMBINED CYCLE
BarryMobile, AL
Alabama Power Total1,070,424
McIntosh Units 10 and 11Effingham County, GA1,318,920
McDonough-Atkinson Units 4 through 6Atlanta, GA2,520,000
Georgia Power Total3,838,920
DanielPascagoula, MS1,070,424
RatcliffeKemper County, MS769,898
Mississippi Power Total1,840,322
FranklinSmiths, AL1,857,820
HarrisAutaugaville, AL1,318,920
MankatoMankato, MN720,000
(d)
RowanSalisbury, NC530,550
Wansley Units 6 and 7Carrollton, GA1,073,000
Southern Power Total5,500,290
Total Combined Cycle12,249,956
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

HYDROELECTRIC FACILITIES
BankheadHolt, AL53,985
BouldinWetumpka, AL225,000
HarrisWedowee, AL132,000
HenryOhatchee, AL72,900
HoltHolt, AL46,944
JordanWetumpka, AL100,000
LayClanton, AL177,000
Lewis SmithJasper, AL157,500
Logan MartinVincent, AL135,000
MartinDadeville, AL182,000
MitchellVerbena, AL170,000
ThurlowTallassee, AL81,000
WeissLeesburg, AL87,750
YatesTallassee, AL47,000
Alabama Power Total1,668,079
Bartletts FerryColumbus, GA173,000
BurtonClayton, GA6,120
Flint RiverAlbany, GA5,400
Goat RockColumbus, GA38,600
Lloyd ShoalsJackson, GA14,400
Morgan FallsAtlanta, GA16,800
NacoocheeLakemont, GA4,800
North HighlandsColumbus, GA29,600
Oliver DamColumbus, GA60,000
Rocky Mountain (25.4%)Rome, GA229,362
(e)
Sinclair DamMilledgeville, GA45,000
Tallulah FallsClayton, GA72,000
TerroraClayton, GA16,000
TugaloClayton, GA45,000
Wallace DamEatonton, GA321,300
YonahToccoa, GA22,500
Georgia Power Total1,099,882
Total Hydroelectric Facilities2,767,961
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

RENEWABLE SOURCES:
SOLAR FACILITIES
Fort RuckerCalhoun County, AL10,560
Anniston Army DepotDale County, AL7,380
Alabama Power Total17,940
Fort BenningColumbus, GA30,005
Fort GordonAugusta, GA30,000
Fort StewartFort Stewart, GA30,000
Kings BayCamden County, GA30,161
DaltonDalton, GA6,508
Marine Corps Logistics BaseAlbany, GA31,161
6 Other PlantsVarious Georgia locations11,171
Georgia Power Total169,006
AdobeKern County, CA20,000
ApexNorth Las Vegas, NV20,000
Boulder IClark County, NV100,000
ButlerTaylor County, GA104,000
Butler Solar FarmTaylor County, GA22,000
CalipatriaImperial County, CA20,000
Campo VerdeImperial County, CA147,420
CimarronSpringer, NM30,640
Decatur CountyDecatur County, GA20,000
Decatur ParkwayDecatur County, GA84,000
Desert StatelineSan Bernadino County, CA299,900
East PecosPecos County, TX120,000
GarlandKern County, CA205,290
Gaskell West IKern County, CA20,000
GranvilleOxford, NC2,500
HenriettaKings County, CA102,000
Imperial ValleyImperial County, CA163,200
LamesaDawson County, TX102,000
Lost Hills - BlackwellKern County, CA32,000
Macho SpringsLuna County, NM55,000
Morelos del SolKern County, CA15,000
North StarFresno County, CA61,600
PawpawTaylor County, GA30,480
RoserockPecos County, TX160,000
RutherfordRutherford County, NC74,800
SandhillsTaylor County, GA148,000
SpectrumClark County, NV30,240
TranquillityFresno County, CA205,300
Southern Power Total2,395,370
(f)
Total Solar2,582,316
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

WIND FACILITIES
BethelCastro County, TX276,000
Cactus FlatsConcho County, TX148,350
Grant PlainsGrant County, OK147,200
Grant WindGrant County, OK151,800
Kay WindKay County, OK299,000
PassadumkeagPenobscot County, ME42,900
Salt ForkDonley & Gray Counties TX174,000
Tyler BluffCooke County, TX125,580
Wake WindCrosby & Floyd Counties, TX257,250
Wildhorse MountainPushmataha County, OK100,000
Southern Power Total1,722,080
(g)
FUEL CELL FACILITY
Redlion and Brookside (DSGP)New Castle and Newark, DE27,500
(h)
Southern Power Total27,500
BATTERY STORAGE FACILITY
MillikenOrange County, CA2,000
(i)
Southern Power Total2,000
Total Alabama Power Generating Capacity10,793,377
Total Georgia Power Generating Capacity14,363,156
Total Mississippi Power Generating Capacity3,516,374
Total Southern Power Generating Capacity12,247,290
Total Generating Capacity41,939,877
(a)
See "Jointly-Owned Facilities" and "Titles to Property" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
(b)
Alabama Power and Georgia Power each own 50% of the outstanding common stock of SEGCO, an operating public utility company. Alabama Power and Georgia Power are each entitled to one-half of SEGCO's capacity and energy. Alabama Power acts as SEGCO's agent in the operation of SEGCO's units and furnishes fuel to SEGCO for its units. See Note 7 to the financial statements under "SEGCO" in Item 8 herein for additional information.
(c)
Generation is dedicated to a single industrial customer. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" in Item 7 herein.
(d)
On January 17, 2020, Southern Power completed the sale of its equity interest in Plant Mankato to a subsidiary of Xcel. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" in Item 8 herein for additional information.
(e)Operated by OPC.
(f)Southern Power owns a 67% equity interest in SP Solar (a limited partnership indirectly owning all of Southern Power's solar facilities, except the Roserock and Gaskell West facilities). SP Solar is the 51% majority owner of Boulder 1, Garland, Henrietta, Imperial Valley, Lost Hills Blackwell, North Star, and Tranquillity; the 66% majority owner of Desert Stateline; and the sole owner of the remaining SP Solar facilities. Southern Power is the 51% majority owner of Roserock and also the controlling partner in a tax equity partnership owning Gaskell West. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for the respective facility.
(g)Southern Power is the controlling member in SP Wind (a tax equity entity owning all of Southern Power's wind facilities, except Cactus Flats and Wildhorse Mountain). SP Wind is the 90.1% majority owner of Wake Wind and owns 100% of the remaining SP Wind facilities. Southern Power is the controlling partner in tax equity partnerships owning Cactus Flats and Wildhorse Mountain. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for the respective facility.
(h)Southern Power has two noncontrolling interest partners that own approximately 10 MWs of the facility.
(i)Southern Power has an equity method investment in the facility as the Class B member.
Except as discussed below under "Titles to Property," the principal plants and other important units of the traditional electric operating companies, Southern Power, and SEGCO are owned in fee by the respective companies. It is the opinion of management of each such company that its operating properties are adequately maintained and are substantially in good operating condition, and suitable for their intended purpose.
Mississippi Power owns a 79-mile length of 500-kilovolt transmission line which is leased to Entergy Gulf States Louisiana, LLC. The line extends from Plant Daniel to the Louisiana state line. Entergy Gulf States Louisiana, LLC is paying a use fee through 2024 covering all expenses and the amortization of the original cost. At December 31, 2019, the unamortized portion was approximately $10 million.
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Mississippi Power owns a lignite mine and equipment that were intended to provide fuel for the Kemper IGCC. Mississippi Power also has mineral reserves located around the Kemper County energy facility. Liberty Fuels Company, LLC, the operator of the mine, has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy FacilityLignite Mine and CO2 Pipeline Facilities" in Item 8 herein for additional information.
In December 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, which identified alternatives that, if implemented, could impact Mississippi Power's generating stations, including Plant Greene County, which is jointly owned with Alabama Power. See BUSINESS in Item 1 herein under "Rate MattersIntegrated Resource PlanningMississippi Power" and Note 2 to the financial statements under "Mississippi PowerReserve Margin Plan" in Item 8 herein for additional information.
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for information regarding the sale of Gulf Power.
In 2019, the maximum demand on the traditional electric operating companies, Southern Power Company, and SEGCO was 34,209,000 KWs and occurred on August 13, 2019. The all-time maximum demand of 38,777,000 KWs on the traditional electric operating companies (including Gulf Power), Southern Power Company, and SEGCO occurred on August 22, 2007. These amounts exclude demand served by capacity retained by MEAG Power, OPC, and SEPA. The reserve margin for the traditional electric operating companies, Southern Power Company, and SEGCO in 2019 was 28.1%. See SELECTED FINANCIAL DATA in Item 6 herein for additional information.
Jointly-Owned Facilities
Alabama Power, Georgia Power, and Mississippi Power at December 31, 2019 had undivided interests in certain generating plants and other related facilities with non-affiliated parties. The percentages of ownership of the total plant or facility are as follows:
    Percentage Ownership  
  
Total
Capacity
 
Alabama
Power
 
Power
South
 
Georgia
Power
 
Mississippi
Power
 OPC 
MEAG
Power
 Dalton 
Gulf
Power
  (MWs)                
Plant Miller Units 1 and 2 1,320
 91.8% 8.2% % % % % % %
Plant Hatch 1,796
 
 
 50.1
 
 30.0
 17.7
 2.2
 
Plant Vogtle Units 1 and 2 2,320
 
 
 45.7
 
 30.0
 22.7
 1.6
 
Plant Scherer Units 1 and 2 1,636
 
 
 8.4
 
 60.0
 30.2
 1.4
 
Plant Scherer Unit 3 818
 
 
 75.0
 
 
 
 
 25.0
Plant Wansley 1,779
 
 
 53.5
 
 30.0
 15.1
 1.4
 
Rocky Mountain 903
 
 
 25.4
 
 74.6
 
 
 
Plant Daniel Units 1 and 2 1,000
 
 
 
 50.0
 
 
 
 50.0
Alabama Power, Georgia Power, and Mississippi Power have contracted to operate and maintain the respective units in which each has an interest (other than Rocky Mountain) as agent for the joint owners. Southern Nuclear operates and provides services to Alabama Power's and Georgia Power's nuclear plants.
In addition, Georgia Power has commitments, in the form of capacity purchases, regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity
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are required whether or not any capacity is available. Portions of the capacity payments made to MEAG Power for its Plant Vogtle Units 1 and 2 investment relate to costs in excess of Georgia Power's allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity is included in purchased power from non-affiliates in Georgia Power's statements of income in Item 8 herein. Also see Note 3 to the financial statements under "Commitments" in Item 8 herein for additional information.
Construction continues on Plant Vogtle Units 3 and 4, which are jointly owned by the Vogtle Owners (with each owner holding the same undivided ownership interest as shown in the table above with respect to Plant Vogtle Units 1 and 2). See Note 2 to the financial statements under "Georgia PowerNuclear Construction" in Item 8 herein.
Titles to Property
The traditional electric operating companies', Southern Power's, and SEGCO's interests in the principal plants and other important units of the respective companies are owned in fee by such companies, subject to the following major encumbrances: (1) liens pursuant to the assumption of debt obligations by Mississippi Power in connection with the acquisition of Plant Daniel Units 3 and 4, (2) a leasehold interest granted by Mississippi Power's largest retail customer, Chevron Products Company (Chevron), at the Chevron refinery, on which five combustion turbines of Mississippi Power are located, (3) liens pursuant to agreements with Chevron on Mississippi Power's co-generation assets located at the Chevron refinery, and (4) liens associated with Georgia Power's reimbursement obligations to the DOE under its loan guarantee, which are secured by a first priority lien on (a) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 and (b) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. See Note 5 to the financial statements under "Assets Subject to Lien" and Note 8 to the financial statements under "Secured Debt" and "Long-term DebtDOE Loan Guarantee Borrowings" in Item 8 herein for additional information. The traditional electric operating companies own the fee interests in certain of their principal plants as tenants in common. See "Jointly-Owned Facilities" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information. Properties such as electric transmission and distribution lines, steam heating mains, and gas pipelines are constructed principally on rights-of-way, which are maintained under franchise or are held by easement only. A substantial portion of lands submerged by reservoirs is held under flood right easements. In addition, certain of the renewable generating facilities occupy or use real property that is not owned, primarily through various leases, easements, rights-of-way, permits, or licenses from private landowners or governmental entities.
Natural Gas
Southern Company Gas considers its properties to be adequately maintained, substantially in good operating condition, and suitable for their intended purpose. The following provides the location and general character of the materially important properties that are used by the segments of Southern Company Gas. Substantially all of Nicor Gas' properties are subject to the lien of the indenture securing its first mortgage bonds. See Note 8 to the financial statements in Item 8 herein for additional information.
Distribution and Transmission Mains
Southern Company Gas' distribution systems transport natural gas from its pipeline suppliers to customers in its service areas. These systems consist primarily of distribution and transmission mains, compressor stations, peak shaving/storage plants, service lines, meters, and regulators. At December 31, 2019, Southern Company Gas' gas distribution operations segment owned approximately 75,585 miles of underground distribution and transmission mains, which are located on easements or rights-of-way that generally provide for perpetual use.
Storage Assets
Gas Distribution Operations
Southern Company Gas owns and operates eight underground natural gas storage fields in Illinois with a total working capacity of approximately 150 Bcf, approximately 135 Bcf of which is usually cycled on an annual basis. This system is designed to meet about 50% of the estimated peak-day deliveries and approximately 40% of the normal winter deliveries in Illinois. This level of storage capability provides Nicor Gas with supply flexibility, improves the reliability of deliveries, and helps mitigate the risk associated with seasonal price movements.
Southern Company Gas also has four LNG plants located in Georgia and Tennessee with total LNG storage capacity of approximately 7.0 Bcf. In addition, Southern Company Gas owns two propane storage facilities in Virginia, each with storage capacity of approximately 0.3 Bcf. The LNG plants and propane storage facility are used by Southern Company Gas' gas distribution operations segment to supplement natural gas supply during peak usage periods.
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All Other
Southern Company Gas subsidiaries own three high-deliverability natural gas storage and hub facilities that are included in the all other segment. Jefferson Island Storage & Hub, LLC operates a storage facility in Louisiana consisting of two salt dome gas storage caverns. See Note 3 to the financial statements under "Other MattersSouthern Company GasNatural Gas Storage Facilities" in Item 8 herein for additional information on a related impairment charge recorded in 2019. Golden Triangle Storage, Inc. operates a storage facility in Texas consisting of two salt dome caverns. Central Valley Gas Storage, LLC operates a depleted field storage facility in California. In addition, Southern Company Gas has a LNG facility in Alabama that produces LNG for Pivotal LNG to support its business of selling LNG as a substitute fuel in various markets. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, in Item 8 herein for additional information.
Jointly-Owned Properties
Southern Company Gas' gas pipeline investments segment has a 50% undivided ownership interest in a 115-mile pipeline facility in northwest Georgia that was placed in service in 2017. Southern Company Gas also has an agreement to lease its 50% undivided ownership in the pipeline facility. See Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
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Item 3.LEGAL PROCEEDINGS
See Note 3 to the financial statements in Item 8 herein for descriptions of legal and administrative proceedings discussed therein.
Item 4.MINE SAFETY DISCLOSURES
Not applicable.
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INFORMATION ABOUT OUR EXECUTIVE OFFICERS – SOUTHERN COMPANY
(Identification of executive officers of Southern Company is inserted in Part I in accordance with Regulation S-K, Item 401) The ages of the officers set forth below are as of December 31, 2019.
Thomas A. Fanning
Chairman, President, and Chief Executive Officer
Age 62
First elected in 2003. Chairman and Chief Executive Officer since December 2010 and President since August 2010.
Andrew W. Evans
Executive Vice President and Chief Financial Officer
Age 53
First elected in 2016. Executive Vice President since July 2016 and Chief Financial Officer since June 2018. Previously served as Chief Executive Officer and Chairman of Southern Company Gas' Board of Directors from January 2016 through June 2018, President of Southern Company Gas from May 2015 through June 2018, Chief Operating Officer of Southern Company Gas from May 2015 through December 2015, and Executive Vice President and Chief Financial Officer of Southern Company Gas from May 2006 through May 2015.
W. Paul Bowers
Chairman, President and Chief Executive Officer of Georgia Power
Age 63
First elected in 2001. Chief Executive Officer, President, and Director of Georgia Power since January 2011. Chairman of Georgia Power's Board of Directors since May 2014.
Stanley W. Connally, Jr.
Executive Vice President of SCS
Age 50
First elected in 2012. Executive Vice President for Operations of SCS since June 2018. Previously served as President, Chief Executive Officer, and Director of Gulf Power from July 2012 through December 2018 and Chairman of Gulf Power's Board of Directors from July 2015 through December 2018.
Mark A. Crosswhite
Chairman, President and Chief Executive Officer of Alabama Power
Age 57
First elected in 2011. President, Chief Executive Officer, and Director of Alabama Power since March 2014. Chairman of Alabama Power's Board of Directors since May 2014.
Kimberly S. Greene
Chairman, President, and Chief Executive Officer of Southern Company Gas
Age 53
First elected in 2013. Chairman, President, and Chief Executive Officer of Southern Company Gas since June 2018. Director of Southern Company Gas since July 2016. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from March 2014 through June 2018.
James Y. Kerr II
Executive Vice President, Chief Legal Officer, and Chief Compliance Officer
Age 55
First elected in 2014. Executive Vice President, Chief Legal Officer (formerly known as General Counsel), and Chief Compliance Officer since March 2014.
Stephen E. Kuczynski
Chairman, President, and Chief Executive Officer of Southern Nuclear
Age 57
First elected in 2011. Chairman, President, and Chief Executive Officer of Southern Nuclear since July 2011.
Mark S. Lantrip
Executive Vice President
Age 65
First elected in 2014. Executive Vice President since February 2019. Chairman, President, and Chief Executive Officer of SCS since March 2014 and Chairman and Chief Executive Officer of Southern Power since March 2018. Previously served as President of Southern Power from March 2018 to May 2019.
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Anthony L. Wilson
Chairman, President, and Chief Executive Officer of Mississippi Power
Age 55
First elected in 2015. President of Mississippi Power since October 2015 and Chief Executive Officer and Director since January 2016. Chairman of Mississippi Power's Board of Directors since August 2016. Previously served as Executive Vice President of Mississippi Power from May 2015 to October 2015 and Executive Vice President of Georgia Power from January 2012 to May 2015.
Christopher C. Womack
Executive Vice President
Age 61
First elected in 2008. Executive Vice President and President of External Affairs since January 2009.
The officers of Southern Company were elected at the first meeting of the directors following the last annual meeting of stockholders held on May 22, 2019, for a term of one year or until their successors are elected and have qualified.
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INFORMATION ABOUT OUR EXECUTIVE OFFICERS – ALABAMA POWER
(Identification of executive officers of Alabama Power is inserted in Part I in accordance with Regulation S-K, Item 401.) The ages of the officers set forth below are as of December 31, 2019.
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
Age 57
First elected in 2014. President, Chief Executive Officer, and Director since March 1, 2014. Chairman since May 2014.
Greg J. Barker
Executive Vice President
Age 56
First elected in 2016. Executive Vice President for Customer Services since February 2016. Previously served as Senior Vice President of Marketing and Economic Development from April 2012 to February 2016.
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
Age 60
First elected in 2010. Executive Vice President, Chief Financial Officer, and Treasurer since August 2010.
Zeke W. Smith
Executive Vice President
Age 60
First elected in 2010. Executive Vice President of External Affairs since November 2010.
James P. Heilbron
Senior Vice President and Senior Production Officer
Age 48
First elected in 2013. Senior Vice President and Senior Production Officer of Alabama Power since March 2013 and Senior Vice President and Senior Production Officer – West of SCS and Senior Production Officer of Mississippi Power since October 2018.
R. Scott Moore
Senior Vice President
Age 52
First elected in 2017. Senior Vice President of Power Delivery since May 2017. Previously served as Vice President of Transmission from August 2012 to May 2017.
The officers of Alabama Power were elected at the meeting of the directors held on April 26, 2019 for a term of one year or until their successors are elected and have qualified.
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PART II

Item 5.MARKET FOR REGISTRANTS' COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
(a)(1) The common stock of Southern Company is listed and traded on the NYSE under the ticker symbol SO. The common stock is also traded on regional exchanges across the U.S.
There is no market for the other Registrants' common stock, all of which is owned by Southern Company.
(a)(2) Number of Southern Company's common stockholders of record at January 31, 2020: 110,780
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.46 in 2019 and $2.38 in 2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. Dividends on Southern Company's common stock are payable at the discretion of Southern Company's Board of Directors and depend upon earnings, financial condition, and other factors. See Note 8 to the financial statements under "Dividend Restrictions" in Item 8 herein for additional information.
Each of the other Registrants have one common stockholder, Southern Company.
(a)(3) Securities authorized for issuance under equity compensation plans.
See Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
(b) Use of Proceeds
Not applicable.
(c) Issuer Purchases of Equity Securities
None.
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Item 6.SELECTED FINANCIAL DATA
Page
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(d)
 2018 2017 
2016(e)
 2015
Operating Revenues (in millions)$21,419
 $23,495
 $23,031
 $19,896
 $17,489
Total Assets (in millions)$118,700
 $116,914
 $111,005
 $109,697
 $78,318
Gross Property Additions (in millions)$7,814
 $8,205
 $5,984
 $7,624
 $6,169
Return on Average Common Equity (percent)(a)
18.15
 9.11
 3.44
 10.80
 11.68
Cash Dividends Paid Per Share of
 Common Stock
$2.4600
 $2.3800
 $2.3000
 $2.2225
 $2.1525
Consolidated Net Income Attributable to
   Southern Company (in millions)(a)
$4,739
 $2,226
 $842
 $2,448
 $2,367
Earnings Per Share —         
Basic$4.53
 $2.18
 $0.84
 $2.57
 $2.60
Diluted4.50
 2.17
 0.84
 2.55
 2.59
Capitalization (in millions):         
Common stockholders' equity$27,505
 $24,723
 $24,167
 $24,758
 $20,592
Preferred and preference stock of subsidiaries and
   noncontrolling interests(b)
4,254
 4,316
 1,361
 1,854
 1,390
Redeemable preferred stock of subsidiaries291
 291
 324
 118
 118
Redeemable noncontrolling interests
 
 
 164
 43
Long-term debt(c)
41,798
 40,736
 44,462
 42,629
 24,688
Total (excluding amounts due within one year)(c)
$73,848
 $70,066
 $70,314
 $69,523
 $46,831
Capitalization Ratios (percent):         
Common stockholders' equity37.2
 35.3
 34.4
 35.6
 44.0
Preferred and preference stock of subsidiaries and
   noncontrolling interests(b)
5.8
 6.2
 1.9
 2.7
 3.0
Redeemable preferred stock of subsidiaries0.4
 0.4
 0.5
 0.2
 0.3
Redeemable noncontrolling interests
 
 
 0.2
 0.1
Long-term debt(c)
56.6
 58.1
 63.2
 61.3
 52.6
Total (excluding amounts due within one year)(c)
100.0
 100.0
 100.0
 100.0
 100.0
Other Common Stock Data:         
Book value per share$26.11
 $23.91
 $23.99
 $25.00
 $22.59
Market price per share:         
High$64.26
 $49.43
 $53.51
 $54.64
 $53.16
Low43.26
 42.38
 46.71
 46.00
 41.40
Close (year-end)63.70
 43.92
 48.09
 49.19
 46.79
Market-to-book ratio (year-end) (percent)243.9
 183.7
 200.5
 196.8
 207.2
Price-earnings ratio (year-end) (times)14.1
 20.1
 57.3
 19.1
 18.0
Dividends paid (in millions)$2,570
 $2,425
 $2,300
 $2,104
 $1,959
Dividend yield (year-end) (percent)3.9
 5.4
 4.8
 4.5
 4.6
Dividend payout ratio (percent)54.2
 108.9
 273.2
 86.0
 82.7
Shares outstanding (in thousands):         
Average1,046,023
 1,020,247
 1,000,336
 951,332
 910,024
Year-end1,053,251
 1,033,788
 1,007,603
 990,394
 911,721
Stockholders of record (year-end)111,252
 116,135
 120,803
 126,338
 131,771
(a)Southern Company recorded a $2.6 billion pre-tax ($1.4 billion after tax) gain associated with the sale of Gulf Power in 2019. Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. In addition, pre-tax charges of $3.4 billion ($2.4 billion after tax) were recorded by Mississippi Power related to the suspension of the Kemper IGCC in 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC. See Notes 2 and 15 to the financial statements in Item 8 herein for additional information.
(b)See Note 15 to the financial statements under "Southern Power – Sales of Renewable Facility Interests" in Item 8 herein for additional information on 2018 changes in noncontrolling interests.
(c)
Amounts related to Gulf Power were reclassified to liabilities held for sale at December 31, 2018. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(d)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(e)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(a)
 2018 2017 
2016(b)
 2015
Operating Revenues (in millions):         
Residential$6,012
 $6,608
 $6,515
 $6,614
 $6,383
Commercial4,936
 5,266
 5,439
 5,394
 5,317
Industrial3,021
 3,224
 3,262
 3,171
 3,172
Other115
 124
 114
 55
 115
Total retail14,084
 15,222
 15,330
 15,234
 14,987
Wholesale2,152
 2,516
 2,426
 1,926
 1,798
Total revenues from sales of electricity16,236
 17,738
 17,756
 17,160
 16,785
Natural gas revenues3,792
 3,854
 3,791
 1,596
 
Other revenues1,391
 1,903
 1,484
 1,140
 704
Total$21,419
 $23,495
 $23,031
 $19,896
 $17,489
Kilowatt-Hour Sales (in millions):         
Residential48,528
 54,590
 50,536
 53,337
 52,121
Commercial49,101
 53,451
 52,340
 53,733
 53,525
Industrial50,106
 53,341
 52,785
 52,792
 53,941
Other726
 799
 846
 883
 897
Total retail148,461
 162,181
 156,507
 160,745
 160,484
Wholesale sales48,027
 49,963
 49,034
 37,043
 30,505
Total196,488
 212,144
 205,541
 197,788
 190,989
Average Revenue Per Kilowatt-Hour (cents):         
Residential12.39
 12.10
 12.89
 12.40
 12.25
Commercial10.05
 9.85
 10.39
 10.04
 9.93
Industrial6.03
 6.04
 6.18
 6.01
 5.88
Total retail9.49
 9.39
 9.80
 9.48
 9.34
Wholesale4.48
 5.04
 4.95
 5.20
 5.89
Total sales8.26
 8.36
 8.64
 8.68
 8.79
Average Annual Kilowatt-Hour         
Use Per Residential Customer12,135
 12,514
 11,618
 12,387
 13,318
Average Annual Revenue         
Per Residential Customer$1,503
 $1,555
 $1,498
 $1,541
 $1,630
Plant Nameplate Capacity         
Ratings (year-end) (megawatts)41,940
 45,824
 46,936
 46,291
 44,223
Maximum Peak-Hour Demand (megawatts):         
Winter30,022
 36,429
 31,956
 32,272
 36,794
Summer34,209
 34,841
 34,874
 35,781
 36,195
System Reserve Margin (at peak) (percent)28.1
 29.8
 30.8
 34.2
 33.2
Annual Load Factor (percent)60.3
 61.2
 61.4
 61.5
 59.9
Plant Availability (percent):         
Fossil-steam83.8
 81.4
 84.5
 86.4
 86.1
Nuclear92.5
 94.0
 94.7
 93.3
 93.5
(a)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(b)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(a)
 2018 2017 
2016(b)
 2015
Source of Energy Supply (percent):         
Gas47.0
 43.0
 42.6
 41.9
 42.8
Coal20.3
 25.7
 26.5
 30.2
 32.2
Nuclear14.7
 13.8
 14.5
 14.6
 15.3
Hydro3.2
 2.9
 2.1
 2.1
 2.6
Other5.9
 5.4
 5.3
 2.3
 0.8
Purchased power8.9
 9.2
 9.0
 8.9
 6.3
Total100.0
 100.0
 100.0
 100.0
 100.0
Gas Sales Volumes (mmBtu in millions):         
Firm737
 791
 729
 296
 
Interruptible106
 109
 109
 53
 
Total843
 900
 838
 349
 
Traditional Electric Operating Company
   Customers (year-end) (in thousands):
         
Residential3,688
 4,053
 4,011
 3,970
 3,928
Commercial549
 603
 599
 595
 590
Industrial17
 17
 18
 17
 17
Other12
 12
 12
 11
 11
Total electric customers4,266
 4,685
 4,640
 4,593
 4,546
Gas distribution operations customers4,277
 4,248
 4,623
 4,586
 
Total utility customers8,543
 8,933
 9,263
 9,179
 4,546
Employees (year-end)27,943
 30,286
 31,344
 32,015
 26,703
(a)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(b)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Alabama Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$6,125
 $6,032
 $6,039
 $5,889
 $5,768
Net Income After Dividends
on Preferred and Preference Stock (in millions)
$1,070
 $930
 $848
 $822
 $785
Cash Dividends on Common Stock (in millions)$844
 $801
 $714
 $765
 $571
Return on Average Common Equity (percent)13.03
 13.00
 12.89
 13.34
 13.37
Total Assets (in millions)$29,152
 $26,730
 $23,864
 $22,516
 $21,721
Gross Property Additions (in millions)$1,862
 $2,273
 $1,949
 $1,338
 $1,492
Capitalization (in millions):         
Common stockholder's equity$8,955
 $7,477
 $6,829
 $6,323
 $5,992
Preference stock
 
 
 196
 196
Redeemable preferred stock291
 291
 291
 85
 85
Long-term debt8,270
 7,923
 7,628
 6,535
 6,654
Total (excluding amounts due within one year)$17,516
 $15,691
 $14,748
 $13,139
 $12,927
Capitalization Ratios (percent):         
Common stockholder's equity51.1
 47.7
 46.3
 48.1
 46.4
Preference stock
 
 
 1.5
 1.5
Redeemable preferred stock1.7
 1.9
 2.0
 0.7
 0.7
Long-term debt47.2
 50.4
 51.7
 49.7
 51.4
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential1,280,955
 1,273,526
 1,268,271
 1,262,752
 1,253,875
Commercial200,349
 200,032
 199,840
 199,146
 197,920
Industrial6,173
 6,158
 6,171
 6,090
 6,056
Other758
 760
 766
 762
 757
Total1,488,235
 1,480,476
 1,475,048
 1,468,750
 1,458,608
Employees (year-end)6,324
 6,650
 6,613
 6,805
 6,986


























Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Alabama Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):
         
Residential$2,449
 $2,335
 $2,302
 $2,322
 $2,207
Commercial1,635
 1,578
 1,649
 1,627
 1,564
Industrial1,393
 1,428
 1,477
 1,416
 1,436
Other24
 26
 30
 (43) 27
Total retail5,501
 5,367
 5,458
 5,322
 5,234
Wholesale — non-affiliates258
 279
 276
 283
 241
Wholesale — affiliates81
 119
 97
 69
 84
Total revenues from sales of electricity5,840
 5,765
 5,831
 5,674
 5,559
Other revenues285
 267
 208
 215
 209
Total$6,125
 $6,032
 $6,039
 $5,889
 $5,768
Kilowatt-Hour Sales (in millions):
         
Residential18,264
 18,626
 17,219
 18,343
 18,082
Commercial13,567
 13,868
 13,606
 14,091
 14,102
Industrial22,148
 23,006
 22,687
 22,310
 23,380
Other173
 187
 198
 208
 201
Total retail54,152
 55,687
 53,710
 54,952
 55,765
Wholesale — non-affiliates5,057
 5,018
 5,415
 5,744
 3,567
Wholesale — affiliates3,530
 4,565
 4,166
 3,177
 4,515
Total62,739
 65,270
 63,291
 63,873
 63,847
Average Revenue Per Kilowatt-Hour (cents):
         
Residential13.41
 12.54
 13.37
 12.66
 12.21
Commercial12.05
 11.38
 12.12
 11.55
 11.09
Industrial6.29
 6.21
 6.51
 6.35
 6.14
Total retail10.16
 9.64
 10.16
 9.68
 9.39
Wholesale3.95
 4.15
 3.89
 3.95
 4.02
Total sales9.31
 8.83
 9.21
 8.88
 8.71
Residential Average Annual
Kilowatt-Hour Use Per Customer
14,290
 14,660
 13,601
 14,568
 14,454
Residential Average Annual
Revenue Per Customer
$1,916
 $1,878
 $1,819
 $1,844
 $1,764
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
10,793
 11,815
 11,797
 11,797
 11,797
Maximum Peak-Hour Demand (megawatts):
         
Winter10,104
 11,744
 10,513
 10,282
 12,162
Summer11,211
 10,652
 10,711
 10,932
 11,292
Annual Load Factor (percent)
60.8
 60.1
 63.5
 63.5
 58.4
Plant Availability (percent):
         
Fossil-steam85.9
 81.6
 82.8
 83.0
 81.5
Nuclear91.0
 91.6
 97.6
 88.0
 92.1
Source of Energy Supply (percent):
         
Coal38.7
 43.8
 44.8
 47.1
 49.1
Nuclear21.3
 20.5
 22.2
 20.3
 21.3
Gas18.5
 17.2
 18.1
 17.1
 14.6
Hydro7.3
 6.7
 5.4
 4.8
 5.6
Purchased power —         
From non-affiliates6.0
 5.4
 4.6
 4.8
 4.4
From affiliates8.2
 6.4
 4.9
 5.9
 5.0
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Georgia Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$8,408
 $8,420
 $8,310
 $8,383
 $8,326
Net Income After Dividends
on Preferred and Preference Stock (in millions)
(*)
$1,720
 $793
 $1,414
 $1,330
 $1,260
Cash Dividends on Common Stock (in millions)$1,576
 $1,396
 $1,281
 $1,305
 $1,034
Return on Average Common Equity (percent)(*)
11.71
 6.04
 12.15
 12.05
 11.92
Total Assets (in millions)$44,541
 $40,365
 $36,779
 $34,835
 $32,865
Gross Property Additions (in millions)$3,659
 $3,176
 $1,080
 $2,314
 $2,332
Capitalization (in millions):
        
Common stockholder's equity$15,065
 $14,323
 $11,931
 $11,356
 $10,719
Preferred and preference stock
 
 
 266
 266
Long-term debt10,791
 9,364
 11,073
 10,225
 9,616
Total (excluding amounts due within one year)$25,856
 $23,687
 $23,004
 $21,847
 $20,601
Capitalization Ratios (percent):
        
Common stockholder's equity58.3
 60.5
 51.9
 52.0
 52.0
Preferred and preference stock
 
 
 1.2
 1.3
Long-term debt41.7
 39.5
 48.1
 46.8
 46.7
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential2,253,188
 2,220,240
 2,185,782
 2,155,945
 2,127,658
Commercial315,328
 312,474
 308,939
 305,488
 302,891
Industrial10,622
 10,571
 10,644
 10,537
 10,429
Other9,819
 9,838
 9,766
 9,585
 9,261
Total2,588,957
 2,553,123
 2,515,131
 2,481,555
 2,450,239
Employees (year-end)6,938
 6,967
 6,986
 7,527
 7,989
(*)Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4.

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Georgia Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Residential$3,287
 $3,301
 $3,236
 $3,318
 $3,240
Commercial3,014
 3,023
 3,092
 3,077
 3,094
Industrial1,326
 1,344
 1,321
 1,291
 1,305
Other80
 84
 89
 86
 88
Total retail7,707
 7,752
 7,738
 7,772
 7,727
Wholesale — non-affiliates129
 163
 163
 175
 215
Wholesale — affiliates11
 24
 26
 42
 20
Total revenues from sales of electricity7,847
 7,939
 7,927
 7,989
 7,962
Other revenues561
 481
 383
 394
 364
Total$8,408
 $8,420
 $8,310
 $8,383
 $8,326
Kilowatt-Hour Sales (in millions):         
Residential28,201
 28,331
 26,144
 27,585
 26,649
Commercial32,818
 32,958
 32,155
 32,932
 32,719
Industrial23,163
 23,655
 23,518
 23,746
 23,805
Other518
 549
 584
 610
 632
Total retail84,700
 85,493
 82,401
 84,873
 83,805
Wholesale — non-affiliates2,646
 3,140
 3,277
 3,415
 3,501
Wholesale — affiliates335
 526
 800
 1,398
 552
Total87,681
 89,159
 86,478
 89,686
 87,858
Average Revenue Per Kilowatt-Hour (cents):         
Residential11.66
 11.65
 12.38
 12.03
 12.16
Commercial9.18
 9.17
 9.62
 9.34
 9.46
Industrial5.72
 5.68
 5.62
 5.44
 5.48
Total retail9.10
 9.07
 9.39
 9.16
 9.22
Wholesale4.70
 5.10
 4.64
 4.51
 5.80
Total sales8.95
 8.90
 9.17
 8.91
 9.06
Residential Average Annual
Kilowatt-Hour Use Per Customer
12,600
 12,849
 12,028
 12,864
 12,582
Residential Average Annual
Revenue Per Customer
$1,469
 $1,555
 $1,489
 $1,557
 $1,529
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
14,363
 15,308
 15,274
 15,274
 15,455
Maximum Peak-Hour Demand (megawatts):         
Winter14,394
 15,372
 13,894
 14,527
 15,735
Summer16,572
 15,748
 16,002
 16,244
 16,104
Annual Load Factor (percent)60.8
 64.5
 61.1
 61.9
 61.9
Plant Availability (percent):         
Fossil-steam81.0
 81.5
 85.0
 87.4
 85.6
Nuclear93.1
 95.0
 93.5
 95.6
 94.1
Source of Energy Supply (percent):         
Gas32.3
 29.1
 28.6
 28.2
 28.3
Nuclear17.4
 17.6
 17.8
 17.6
 17.6
Coal16.4
 21.1
 22.4
 26.4
 24.5
Hydro1.8
 1.9
 1.0
 1.1
 1.6
Other0.3
 0.3
 0.3
 
 
Purchased power —         
From non-affiliates11.3
 7.3
 7.8
 6.7
 5.0
From affiliates20.5
 22.7
 22.1
 20.0
 23.0
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Mississippi Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$1,264
 $1,265
 $1,187
 $1,163
 $1,138
Net Income (Loss) After Dividends
on Preferred Stock (in millions)
(a)(b)
$139
 $235
 $(2,590) $(50) $(8)
Return on Average Common Equity (percent)(a)(b)
8.54
 15.83
 (120.43) (1.87) (0.34)
Total Assets (in millions)$5,035
 $4,886
 $4,866
 $8,235
 $7,840
Gross Property Additions (in millions)$197
 $206
 $536
 $946
 $972
Capitalization (in millions):         
Common stockholder's equity$1,652
 $1,609
 $1,358
 $2,943
 $2,359
Redeemable preferred stock
 
 33
 33
 33
Long-term debt1,308
 1,539
 1,097
 2,424
 1,886
Total (excluding amounts due within one year)$2,960
 $3,148
 $2,488
 $5,400
 $4,278
Capitalization Ratios (percent):         
Common stockholder's equity55.8
 51.1
 54.6
 54.5
 55.1
Redeemable preferred stock
 
 1.3
 0.6
 0.8
Long-term debt44.2
 48.9
 44.1
 44.9
 44.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential154,205
 153,423
 153,115
 153,172
 153,158
Commercial33,552
 33,968
 33,992
 33,783
 33,663
Industrial444
 445
 452
 451
 467
Other189
 188
 173
 175
 175
Total188,390
 188,024
 187,732
 187,581
 187,463
Employees (year-end)1,030
 1,053
 1,242
 1,484
 1,478
(a)As a result of the Tax Reform Legislation, Mississippi Power recorded an income tax expense (benefit) of $(35) million and $372 million in 2018 and 2017, respectively.
(b)Pre-tax charges of $3.4 billion ($2.4 billion after tax) were recorded by Mississippi Power related to the suspension of the Kemper IGCC in 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC.

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Mississippi Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Residential$276
 $273
 $257
 $260
 $238
Commercial287
 286
 285
 279
 256
Industrial302
 321
 321
 313
 287
Other12
 9
 (9) 7
 (5)
Total retail877
 889
 854
 859
 776
Wholesale — non-affiliates237
 263
 259
 261
 270
Wholesale — affiliates132
 91
 56
 26
 76
Total revenues from sales of electricity1,246
 1,243
 1,169
 1,146
 1,122
Other revenues18
 22
 18
 17
 16
Total$1,264
 $1,265
 $1,187
 $1,163
 $1,138
Kilowatt-Hour Sales (in millions):         
Residential2,062
 2,113
 1,944
 2,051
 2,025
Commercial2,715
 2,797
 2,764
 2,842
 2,806
Industrial4,795
 4,924
 4,841
 4,906
 4,958
Other36
 37
 39
 39
 40
Total retail9,608
 9,871
 9,588
 9,838
 9,829
Wholesale — non-affiliates3,967
 3,980
 3,672
 3,920
 3,852
Wholesale — affiliates4,758
 2,584
 2,024
 1,108
 2,807
Total18,333
 16,435
 15,284
 14,866
 16,488
Average Revenue Per Kilowatt-Hour (cents):         
Residential13.39
 12.92
 13.22
 12.68
 11.75
Commercial10.57
 10.23
 10.31
 9.82
 9.12
Industrial6.30
 6.52
 6.63
 6.38
 5.79
Total retail9.13
 9.01
 8.91
 8.73
 7.90
Wholesale4.23
 5.39
 5.53
 5.71
 5.20
Total sales6.80
 7.56
 7.65
 7.71
 6.80
Residential Average Annual
Kilowatt-Hour Use Per Customer
13,391
 13,768
 12,692
 13,383
 13,242
Residential Average Annual
Revenue Per Customer
$1,795
 $1,780
 $1,680
 $1,697
 $1,556
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
3,516
 3,516
 3,628
 3,481
 3,561
Maximum Peak-Hour Demand (megawatts):         
Winter2,129
 2,763
 2,390
 2,195
 2,548
Summer2,310
 2,346
 2,322
 2,384
 2,403
Annual Load Factor (percent)64.6
 55.8
 63.1
 64.0
 60.6
Plant Availability Fossil-Steam (percent)89.1
 82.4
 89.1
 91.4
 90.6
Source of Energy Supply (percent):         
Gas91.7
 87.4
 90.4
 86.4
 82.3
Coal5.5
 6.9
 7.6
 8.1
 16.6
Purchased power —         
From non-affiliates2.1
 3.3
 (2.1) (2.0) (0.4)
From affiliates0.7
 2.4
 4.1
 7.5
 1.5
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Wholesale — non-affiliates$1,528
 $1,757
 $1,671
 $1,146
 $964
Wholesale — affiliates398
 435
 392
 419
 417
Total revenues from sales of electricity1,926
 2,192
 2,063
 1,565
 1,381
Other revenues12
 13
 12
 12
 9
Total$1,938
 $2,205
 $2,075
 $1,577
 $1,390
Net Income Attributable to
   Southern Power (in millions)(a)
$339
 $187
 $1,071
 $338
 $215
Cash Dividends
   on Common Stock (in millions)
$206
 $312
 $317
 $272
 $131
Return on Average Common Equity (percent)(a)
12.69
 4.62
 22.39
 9.79
 10.16
Total Assets (in millions)$14,300
 $14,883
 $15,206
 $15,169
 $8,905
Property, Plant, and Equipment
   In Service (in millions)
$13,270
 $13,271
 $13,755
 $12,728
 $7,275
Capitalization (in millions):         
Common stockholders' equity(b)
$2,368
 $2,968
 $5,138
 $4,430
 $2,483
Noncontrolling interests(b)
4,254
 4,316
 1,360
 1,245
 781
Redeemable noncontrolling interests
 
 
 164
 43
Long-term debt3,574
 4,418
 5,071
 5,068
 2,719
Total (excluding amounts due within one year)$10,196
 $11,702
 $11,569
 $10,907
 $6,026
Capitalization Ratios (percent):         
Common stockholders' equity(b)
23.2
 25.4
 44.4
 40.6
 41.2
Noncontrolling interests(b)
41.7
 36.9
 11.8
 11.4
 13.0
Redeemable noncontrolling interests
 
 
 1.5
 0.7
Long-term debt35.1
 37.7
 43.8
 46.5
 45.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Kilowatt-Hour Sales (in millions):         
Wholesale — non-affiliates36,358
 37,164
 35,920
 23,213
 18,544
Wholesale — affiliates12,928
 12,603
 12,811
 15,950
 16,567
Total49,286
 49,767
 48,731
 39,163
 35,111
Plant Nameplate Capacity
   Ratings (year-end) (megawatts)
12,247
 11,888
 12,940
 12,442
 9,808
Maximum Peak-Hour Demand (megawatts):         
Winter3,436
 2,867
 3,421
 3,469
 3,923
Summer4,460
 4,210
 4,224
 4,303
 4,249
Annual Load Factor (percent)49.8
 52.2
 49.1
 50.0
 49.0
Plant Availability (percent)98.8
 99.9
 99.9
 91.6
 93.1
Source of Energy Supply (percent):         
Natural gas69.5
 68.1
 67.7
 79.4
 89.5
Solar, Wind, and Biomass23.7
 23.6
 22.8
 12.1
 4.3
Purchased power —         
From non-affiliates6.1
 6.6
 7.8
 6.8
 4.7
From affiliates0.7
 1.7
 1.7
 1.7
 1.5
Total100.0
 100.0
 100.0
 100.0
 100.0
Employees (year-end)(c)
460
 491
 541
 
 
(a)As a result of the Tax Reform Legislation, Southern Power recorded an income tax expense (benefit) of $79 million and $(743) million in 2018 and 2017, respectively.
(b)See Note 15 to the financial statements under "Southern Power – Sales of Renewable Facility Interests" in Item 8 herein for additional information on 2018 changes in noncontrolling interests.
(c)Prior to December 2017, Southern Power had no employees but was billed for employee-related costs from SCS.

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Successor(a)
  
Predecessor(a)
 2019 
2018(b)
 2017 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015
Operating Revenues (in millions)$3,792
 $3,909
 $3,920
 $1,652
  $1,905
 $3,941
Net Income Attributable to
Southern Company Gas
(in millions)
(c)
$585
 $372
 $243
 $114
  $131
 $353
Cash Dividends on Common Stock
(in millions)
$471
 $468
 $443
 $126
  $128
 $244
Return on Average Common Equity
(percent)
(c)
6.47
 4.23
 2.68
 1.74
  3.31
 9.05
Total Assets (in millions)$21,687
 $21,448
 $22,987
 $21,853
  $14,488
 $14,754
Gross Property Additions
(in millions)
$1,418
 $1,399
 $1,525
 $632
  $548
 $1,027
Capitalization (in millions):            
Common stockholders' equity$9,506
 $8,570
 $9,022
 $9,109
  $3,933
 $3,975
Long-term debt5,845
 5,583
 5,891
 5,259
  3,709
 3,275
Total (excluding amounts due within
one year)
$15,351
 $14,153
 $14,913
 $14,368
  $7,642
 $7,250
Capitalization Ratios (percent):            
Common stockholders' equity61.9
 60.6
 60.5
 63.4
  51.5
 54.8
Long-term debt38.1
 39.4
 39.5
 36.6
  48.5
 45.2
Total (excluding amounts due within
one year)
100.0
 100.0
 100.0
 100.0
  100.0
 100.0
Service Contracts (period-end)
 
 1,184,257
 1,198,263
  1,197,096
 1,205,476
Customers (period-end)            
Gas distribution operations4,277,219
 4,247,804
 4,623,249
 4,586,477
  4,544,489
 4,557,729
Gas marketing services630,682
 697,384
 773,984
 655,999
  630,475
 654,475
Total4,907,901
 4,945,188
 5,397,233
 5,242,476
  5,174,964
 5,212,204
Employees (period-end)4,446
 4,389
 5,318
 5,292
  5,284
 5,203
(a)As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
(c)As a result of the Tax Reform Legislation, Southern Company Gas recorded income tax expense of $93 million in 2017.

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Successor(a)
  
Predecessor(a)
 2019 
2018(b)
 2017 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015
Operating Revenues (in millions)            
Residential$1,737
 $1,886
 $2,100
 $899
  $1,101
 $2,129
Commercial485
 546
 641
 260
  310
 617
Transportation907
 944
 811
 269
  290
 526
Industrial121
 140
 159
 74
  72
 203
Other542
 393
 209
 150
  132
 466
Total$3,792
 $3,909
 $3,920
 $1,652
  $1,905
 $3,941
Heating Degree Days:            
Illinois6,136
 6,101
 5,246
 1,903
  3,340
 5,433
Georgia2,157
 2,588
 1,970
 727
  1,448
 2,204
Gas Sales Volumes
(mmBtu in millions):
            
Gas distribution operations            
Firm677
 721
 667
 274
  396
 695
Interruptible92
 95
 95
 47
  49
 99
Total769
 816
 762
 321
  445
 794
Gas marketing services            
Firm:            
Georgia33
 37
 32
 13
  21
 35
Illinois12
 13
 12
 4
  8
 13
Other15
 20
 18
 5
  7
 11
Interruptible large commercial and
industrial
14
 14
 14
 6
  8
 14
Total74
 84
 76
 28
  44
 73
Market share in Georgia (percent)28.9
 29.0
 29.2
 29.4
  29.3
 29.7
Wholesale gas services            
Daily physical sales (mmBtu in
millions/day
)
6.4
 6.7
 6.4
 7.2
  7.6
 6.8
(a)As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.


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Item 7.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Page
Combined Management's Discussion and Analysis of Financial Condition and Results of Operations
This section generally discusses 2019 and 2018 items and year-to-year comparisons between 2019 and 2018. Discussions of 2017 items and year-to-year comparisons between 2018 and 2017 that are not included in this Annual Report on Form 10-K can be found in Item 7 of each Registrant's Annual Report on Form 10-K for the year ended December 31, 2018, which was filed with the SEC on February 19, 2019. The following Management's Discussion and Analysis of Financial Condition and Results of Operations is a combined presentation; however, information contained herein relating to any individual Registrant is filed by such Registrant on its own behalf and each Registrant makes no representation as to information related to the other Registrants.
Item 7A.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" in Item 7 herein and Note 1 to the financial statements under "Financial Instruments" in Item 8 herein. Also see Notes 13 and 14 to the financial statements in Item 8 herein.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS
Southern Company and Subsidiary Companies 2019 Annual Report

OVERVIEW
Business Activities
Southern Company is a holding company that owns all of the common stock of three traditional electric operating companies, as well as the parent entities of Southern Power and Southern Company Gas, and owns other direct and indirect subsidiaries. The primary businesses of the Southern Company system are electricity sales by the traditional electric operating companies and Southern Power and the distribution of natural gas by Southern Company Gas. Southern Company's reportable segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas.
The traditional electric operating companies – Alabama Power, Georgia Power, and Mississippi Power – are vertically integrated utilities providing electric service to retail customers in three Southeastern states in addition to wholesale customers in the Southeast.
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas. Southern Company Gas owns natural gas distribution utilities in four states – Illinois, Georgia, Virginia, and Tennessee – and is also involved in several other complementary businesses. Southern Company Gas manages its business through four reportable segments – gas distribution operations, gas pipeline investments, wholesale gas services, which includes Sequent, a natural gas asset optimization company, and gas marketing services, which includes SouthStar, a provider of energy-related products and services to natural gas markets – and one non-reportable segment, all other. See Notes 7 and 16 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of the Southern Company system's electric service and natural gas businesses. These factors include the ability to maintain constructive regulatory environments, to maintain and grow sales and customers, and to effectively manage and secure timely recovery of prudently-incurred costs. These costs include those related to projected long-term demand growth; stringent environmental standards, including CCR rules; safety; system reliability and resilience; fuel; natural gas; restoration following major storms; and capital expenditures, including constructing new electric generating plants and expanding and improving the electric transmission and electric and natural gas distribution systems.
The traditional electric operating companies and natural gas distribution utilities have various regulatory mechanisms that address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Southern Company system for the foreseeable future. See Note 2 to the financial statements for additional information.
Southern Power's future earnings will depend upon the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as Southern Power's ability to execute its growth strategy and to develop and construct generating facilities. In addition, Southern Power's future earnings will depend upon the availability of federal and state ITCs and PTCs on its renewable energy projects, which could be impacted by future tax legislation. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions," "Construction Programs," and "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
Southern Company's other business activities include providing energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency. Other business activities also include investments in telecommunications, leveraged lease projects, and gas storage facilities. Management continues to evaluate the contribution of each of these activities to total shareholder return and may pursue acquisitions, dispositions, and other strategic ventures or investments accordingly.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Recent Developments
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax).
Alabama Power
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, as well as the acquisition of an existing combined cycle facility for a total capital investment of approximately $1.1 billion. The related costs would be recovered through existing rate mechanisms. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama Power" herein for additional information.
Georgia Power
Rate Case
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, including estimated rate increases totaling $342 million, $181 million, and $386 million effective January 1, 2020, January 1, 2021, and January 1, 2022, respectively. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans2019 ARP" herein for additional information.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric generating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its total project capital cost forecast to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds), with respect to Georgia Power's ownership interest. As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. Following the vote to continue construction, Georgia Power entered into agreements to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and to provide funding with respect to a MEAG Power wholly-owned subsidiary's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics. In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4.
In March 2019, Georgia Power entered into the Amended and Restated Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4, up to approximately $5.130 billion. At December 31, 2019, Georgia Power had a total of $3.8 billion of borrowings outstanding under the related multi-advance credit facilities.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein and Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million related to the Kemper County energy facility, which was suspended in 2017, primarily associated with the expected close out of a DOE contract related to the Kemper County energy facility, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In December 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. Mine reclamation activities are expected to be substantially completed in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion, and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy Facility" and Note 3 to the financial statements for additional information, including remaining contingencies related to the Kemper IGCC.
On November 26, 2019, Mississippi Power filed a base rate case (Mississippi Power 2019 Base Rate Case) with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a 53% average equity ratio and a 7.728% return on investment. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under "Mississippi Power2019 Base Rate Case" for additional information.
Southern Power
During 2019, Southern Power completed construction and achieved commercial operation of the 100-MW Wildhorse Mountain wind facility, acquired and continued construction of the 136-MW Skookumchuck wind facility, and continued construction of the 200-MW Reading wind facility. In addition, Southern Power acquired a majority interest in DSGP, an affiliate of Bloom Energy, that owns and operates fuel cell generation facilities, for a total purchase price of approximately $167 million.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments.
Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Power" and Construction ProgramsSouthern Power" herein for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
During 2019, the natural gas distribution utilities have been involved in the following regulatory proceedings:
On September 25, 2019, the Virginia Commission approved Virginia Natural Gas' Steps to Advance Virginia's Energy (SAVE) program request to amend and extend the program through 2024 with estimated capital spend totaling approximately $365 million.
On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase for Nicor Gas, including $65 million related to the recovery of investments under the Investing in Illinois program, which became effective October 8, 2019.
On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase for Atlanta Gas Light, effective January 1, 2020.
See FUTURE EARNINGS POTENTIAL – "Regulatory MattersSouthern Company GasRate Proceedings" herein and Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
Also during 2019, Southern Company Gas recorded a pre-tax impairment charge of $91 million ($69 million after tax) related to a natural gas storage facility in Louisiana. See Note 3 to the financial statements under "Other MattersSouthern Company Gas" for additional information.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Company Gas" herein for information regarding Southern Company Gas' 2018 disposition activity.
Key Performance Indicators
In striving to achieve attractive risk-adjusted returns while providing cost-effective energy to more than eight million electric and gas utility customers collectively, the traditional electric operating companies and Southern Company Gas continue to focus on several key performance indicators. These indicators include, but are not limited to, customer satisfaction, plant availability, electric and natural gas system reliability, and execution of major construction projects. In addition, Southern Company and the Subsidiary Registrants focus on earnings per share (EPS) and net income, respectively, as a key performance indicator. See RESULTS OF OPERATIONS herein for information on the Registrants' financial performance. See RESULTS OF OPERATIONS – "Southern Company GasOperating Metrics" for additional information on Southern Company Gas' operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
The financial success of the traditional electric operating companies and Southern Company Gas is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. The traditional electric operating companies use customer satisfaction surveys to evaluate their results and generally target the top quartile of these surveys in measuring performance. Reliability indicators are also used to evaluate results. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate RSE" and " – Mississippi PowerPerformance Evaluation Plan" herein for additional information on Alabama Power's Rate RSE and Mississippi Power's PEP rate plan, respectively, both of which contain mechanisms that directly tie customer service indicators to the allowed equity return.
Southern Power continues to focus on several key performance indicators, including, but not limited to, the equivalent forced outage rate and contract availability to evaluate operating results and help ensure its ability to meet its contractual commitments to customers.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

RESULTS OF OPERATIONS
Southern Company
Consolidated net income attributable to Southern Company was $4.7 billion in 2019, an increase of $2.5 billion, or 112.9%, from the prior year. The increase was primarily due to the $2.6 billion ($1.4 billion after tax) gain on the sale of Gulf Power in 2019 and a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4. See "Electricity BusinessEstimated Loss on Plants Under Construction" herein and Notes 2 and 15 to the financial statements under "Georgia PowerNuclear Construction" and "Southern Company," respectively, for additional information.
Basic EPS was $4.53 in 2019 and $2.18 in 2018. Diluted EPS, which factors in additional shares related to stock-based compensation, was $4.50 in 2019 and $2.17 in 2018. EPS for 2019 and 2018 was negatively impacted by $0.11 and $0.04 per share, respectively, as a result of increases in the average shares outstanding. See Note 8 to the financial statements under "Outstanding Classes of Capital Stock – Southern Company" for additional information.
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.46 in 2019 and $2.38 in 2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. For 2019, the dividend payout ratio was 54% compared to 109% for 2018. The decrease was due to the increase in earnings in 2019.
Discussion of Southern Company's results of operations is divided into three parts – the Southern Company system's primary business of electricity sales, its gas business, and its other business activities.
 2019 2018
 (in millions)
Electricity business$3,268
 $2,304
Gas business585
 372
Other business activities886
 (450)
Net Income$4,739
 $2,226
Electricity Business
Southern Company's electric utilities generate and sell electricity to retail and wholesale customers. The results of operations discussed below include the results of Gulf Power through December 31, 2018. See Note 15 to the financial statements under "Southern Company" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income for the electricity business follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Electric operating revenues$17,095
 $(1,476)
Fuel3,622
 (1,015)
Purchased power816

(155)
Cost of other sales76
 10
Other operations and maintenance4,479
 (156)
Depreciation and amortization2,472
 (93)
Taxes other than income taxes1,011
 (87)
Estimated loss on plants under construction24
 (1,073)
Impairment charges3
 (153)
(Gain) loss on dispositions, net(21) (21)
Total electric operating expenses12,482
 (2,743)
Operating income4,613
 1,267
Allowance for equity funds used during construction121
 (10)
Interest expense, net of amounts capitalized987
 (48)
Other income (expense), net234
 90
Income taxes708
 501
Net income3,273
 894
Less:   
Dividends on preferred and preference stock of subsidiaries15
 (1)
Net income (loss) attributable to noncontrolling interests(10) (69)
Net Income Attributable to Southern Company$3,268
 $964
Electric Operating Revenues
Electric operating revenues for 2019 were $17.1 billion, reflecting a $1.5 billion decrease from 2018. Details of electric operating revenues were as follows:
 2019 2018
 (in millions)
Retail electric — prior year$15,222
  
Estimated change resulting from —   
Rates and pricing581
  
Sales decline(143)  
Weather29
  
Fuel and other cost recovery(392)  
Gulf Power disposition(1,213)  
Retail electric — current year14,084
 $15,222
Wholesale electric revenues2,152
 2,516
Other electric revenues636
 664
Other revenues223
 169
Electric operating revenues$17,095
 $18,571
Percent change(7.9)% 0.2%
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Retail electric revenues decreased $1.1 billion, or 7.5%, in 2019 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 2019 was primarily due to the impacts of Alabama Power's customer bill credits issued in 2018 related to the Tax Reform Legislation, additional capital investments recovered through Rate CNP Compliance, and lower Rate RSE customer refund in 2019 as compared to the prior year; Georgia Power's higher contributions from commercial and industrial customers with variable demand-driven pricing, NCCR rate increase effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018; and Mississippi Power's PEP and ECO Plan rate increases effective for the first billing cycle of September 2018.
Electric rates for the traditional electric operating companies include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of PPA costs, and do not affect net income. The traditional electric operating companies each have one or more regulatory mechanisms to recover other costs such as environmental and other compliance costs, storm damage, new plants, and PPA capacity costs.
See Note 2 to the financial statements under "Alabama Power," "Georgia Power," and "Mississippi Power" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Wholesale electric revenues consist of PPAs and short-term opportunity sales. Wholesale electric revenues from PPAs (other than solar and wind PPAs) have both capacity and energy components. Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment. Energy revenues will vary depending on fuel prices, the market prices of wholesale energy compared to the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Energy sales from solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or through a fixed price related to the energy. As a result, the ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Wholesale electric revenues at Mississippi Power include FERC-regulated MRA sales as well as market-based sales. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Southern Company system's variable cost to produce the energy.
Wholesale electric revenues from power sales were as follows:
 2019 2018
 (in millions)
Capacity and other$529
 $620
Energy1,623
 1,896
Total$2,152
 $2,516
In 2019, wholesale revenues decreased $364 million, or 14.5%, as compared to the prior year due to decreases of $273 million in energy revenues and $91 million in capacity revenues. Excluding the $28 million decrease associated with the sale of Gulf Power, energy revenues decreased $165 million at Southern Power and $80 million at the traditional electric operating companies. The decrease at Southern Power related to a $113 million decrease primarily in non-PPA short-term sales and a decrease in the market price of energy, as well as a $51 million decrease primarily in sales under PPAs from natural gas facilities. The decrease at the traditional electric operating companies was primarily due to lower natural gas prices. Excluding the $26 million decrease associated with the sale of Gulf Power, the decrease in capacity revenues was primarily related to the sales of Southern Power's Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) in December 2018 and Southern Power's Plant Nacogdoches in June 2019. See Note 15 to the financial statements for additional information.
Other Electric Revenues
Other electric revenues decreased $28 million, or 4.2%, in 2019 as compared to the prior year. The decrease was primarily due to a decrease of $66 million related to the sale of Gulf Power, partially offset by increases at Georgia Power of $13 million in regulated power delivery construction and maintenance contracts and $11 million from outdoor lighting LED conversions and sales, as well as an increase at Alabama Power of $9 million from pole attachment agreements.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
       
Adjusted(b)
 Total
KWHs
 Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
(a)
 Total KWH Percent Change 
Weather-Adjusted Percent Change(a)
 (in billions)        
Residential48.5
 (11.1)% (10.7)% (1.1)% (0.8)%
Commercial49.1
 (8.1) (8.6) (1.1) (1.6)
Industrial50.1
 (6.1) (6.1) (2.9) (2.9)
Other0.8
 (9.1) (9.0) (5.8) (5.7)
Total retail148.5
 (8.5) (8.4)% (1.7) (1.8)%
Wholesale48.0
 (3.9)   (2.6)  
Total energy sales196.5
 (7.4)%   (1.9)%  
(a)Weather-adjusted KWH sales are estimated by removing from KWH sales the effect of deviations from normal temperature conditions, based on statistical models of the historical relationship between temperatures and energy sales. Normal temperature conditions are defined as those experienced in the applicable service territory over a specified historical period. This metric is useful because it allows trends in historical operations to be evaluated apart from the influence of weather conditions. Management also considers this metric in developing long-term capital and financial plans.
(b)Kilowatt-hour sales comparisons to the prior year were significantly impacted by the disposition of Gulf Power on January 1, 2019. These changes exclude Gulf Power.
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Excluding the impact of the Gulf Power disposition on January 1, 2019, weather-adjusted retail energy sales decreased 2.7 billion KWHs in 2019 as compared to the prior year primarily due to lower customer usage. Weather-adjusted residential usage decreases are primarily attributable to an increase in energy-efficient residential appliances and energy saving initiatives, partially offset by customer growth. Weather-adjusted commercial usage decreases are primarily attributable to an increase in energy saving initiatives and an ongoing migration to the electronic commerce business model. Industrial usage decreases are a result of changes in production levels primarily in the primary metals, paper, chemicals, and textiles sectors.
See "Electric Operating Revenues" above for a discussion of significant changes in wholesale revenues related to changes in price and KWH sales.
Other Revenues
Other revenues increased $54 million, or 32.0%, in 2019 as compared to the prior year. The increase was primarily due to increases at Georgia Power of $20 million from unregulated sales associated with new energy conservation projects and $14 million from unregulated power delivery construction and maintenance contracts, as well as an increase at Alabama Power of $11 million in unregulated sales of products and services.
Fuel and Purchased Power Expenses
The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the electric utilities purchase a portion of their electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the Southern Company system's generation and purchased power were as follows:
 2019 
2018(a)
Total generation (in billions of KWHs)
187
 191
Total purchased power (in billions of KWHs)
18
 14
Sources of generation (percent) —

 
Gas52
 48
Coal22
 27
Nuclear16
 16
Hydro3
 3
Other7
 6
Cost of fuel, generated (in cents per net KWH) 

 
Gas2.36
 2.76
Coal2.87
 2.93
Nuclear0.79
 0.80
Average cost of fuel, generated (in cents per net KWH)
2.20
 2.46
Average cost of purchased power (in cents per net KWH)(b)
5.01
 5.94
(a)Excludes Gulf Power, which was sold on January 1, 2019.
(b)Average cost of purchased power includes fuel purchased by the Southern Company system for tolling agreements where power is generated by the provider.
In 2019, total fuel and purchased power expenses were $4.4 billion, a decrease of $1.2 billion, or 20.9%, as compared to the prior year. Excluding approximately $511 million associated with the sale of Gulf Power, the decrease was primarily the result of a $575 million decrease in the average cost of fuel and purchased power and an $84 million net decrease in the volume of KWHs generated and purchased.
Fuel and purchased power energy transactions at the traditional electric operating companies are generally offset by fuel revenues and do not have a significant impact on net income. See FUTURE EARNINGS POTENTIAL – "Regulatory Matters" herein for additional information. Fuel expenses incurred under Southern Power's PPAs are generally the responsibility of the counterparties and do not significantly impact net income.
Fuel
In 2019, fuel expense was $3.6 billion, a decrease of $1.0 billion, or 21.9%, as compared to the prior year. Excluding approximately $309 million related to Gulf Power in 2018, the decrease was primarily due to an 18.1% decrease in the volume of KWHs generated by coal, a 14.5% decrease in the average cost of natural gas per KWH generated, and a 2.1% decrease in the average cost of coal per KWH generated, partially offset by a 5.0% increase in the volume of KWHs generated by natural gas.
Financing Programs
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY in Item 7 herein and Note 8 to the financial statements in Item 8 herein for information concerning financing programs.
Fuel Supply
Electric
The traditional electric operating companies' and SEGCO's supply of electricity is primarily fueled by natural gas and coal. Southern Power's supply of electricity is primarily fueled by natural gas. See MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION – "Southern CompanyElectricity BusinessFuel and Purchased Power Expenses" and MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION under "Fuel and Purchased Power Expenses" for each of the traditional electric operating companies in Item 7 herein for information regarding the electricity generated and the average cost of fuel in cents per net KWH generated for the years 2018 and 2019.
The traditional electric operating companies have agreements in place from which they expect to receive substantially all of their 2020 coal burn requirements. These agreements have terms ranging between one and four years. Fuel procurement specifications, emission allowances, environmental control systems, and fuel changes have allowed the traditional electric operating companies to remain within limits set by applicable environmental regulations. As new environmental regulations are proposed that impact the utilization of coal, the traditional electric operating companies' fuel mix will be monitored to help ensure that the traditional electric operating companies remain in compliance with applicable laws and regulations. Additionally, Southern Company and the traditional electric operating companies will continue to evaluate the need to purchase additional emissions allowances, the timing of capital expenditures for environmental control equipment, and potential unit retirements and replacements. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein for additional information on environmental matters.
SCS, acting on behalf of the traditional electric operating companies and Southern Power Company, has agreements in place for the natural gas burn requirements of the Southern Company system. For 2020, SCS has contracted for 530 Bcf of natural gas supply under agreements with remaining terms up to 14 years. In addition to natural gas supply, SCS has contracts in place for both firm natural gas transportation and storage. Management believes these contracts provide sufficient natural gas supplies, transportation, and storage to ensure normal operations of the Southern Company system's natural gas generating units.
Alabama Power and Georgia Power have multiple contracts covering their nuclear fuel needs for uranium, conversion services, enrichment services, and fuel fabrication with remaining terms ranging from one to 14 years. Management believes suppliers have sufficient nuclear fuel production capability to permit the normal operation of the Southern Company system's nuclear generating units.
Changes in fuel prices to the traditional electric operating companies are generally reflected in fuel adjustment clauses contained in rate schedules. See "Rate Matters – Rate Structure and Cost Recovery Plans" herein for additional information. Southern Power's natural gas PPAs generally provide that the counterparty is responsible for substantially all of the cost of fuel.
Alabama Power and Georgia Power have contracts with the United States, acting through the DOE, that provide for the permanent disposal of spent nuclear fuel. The DOE failed to begin disposing of spent fuel in 1998, as required by the contracts, and Alabama Power and Georgia Power have pursued and are pursuing legal remedies against the government for breach of contract. See Note 3 to the financial statements under "Nuclear Fuel Disposal Costs" in Item 8 herein for additional information.
Natural Gas
Advances in natural gas drilling in shale producing regions of the United States have resulted in historically high supplies of natural gas and low prices for natural gas. Procurement plans for natural gas supply and transportation to serve regulated utility customers are reviewed and approved by the regulatory agencies in the states where Southern Company Gas operates. Southern Company Gas purchases natural gas supplies in the open market by contracting with producers and marketers and, for the natural gas distribution utilities except Nicor Gas, from its wholly-owned subsidiary, Sequent, under asset management agreements approved by the applicable state regulatory agency. Southern Company Gas also contracts for transportation and
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storage services from interstate pipelines that are regulated by the FERC. When firm pipeline services are temporarily not needed, Southern Company Gas may release the services in the secondary market under FERC-approved capacity release provisions or utilize asset management arrangements, thereby reducing the net cost of natural gas charged to customers for most of the natural gas distribution utilities. Peak-use requirements are met through utilization of company-owned storage facilities, pipeline transportation capacity, purchased storage services, peaking facilities, and other supply sources, arranged by either transportation customers or Southern Company Gas.
Territory Served by the Southern Company System
Traditional Electric Operating Companies and Southern Power
The territory in which the traditional electric operating companies provide retail electric service comprises most of the states of Alabama and Georgia, together with southeastern Mississippi. In this territory there are non-affiliated electric distribution systems that obtain some or all of their power requirements either directly or indirectly from the traditional electric operating companies. As of December 31, 2019, the territory had an area of approximately 116,000 square miles and an estimated population of approximately 16 million. Southern Power sells wholesale electricity at market-based rates across various U.S. utility markets, primarily to investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Alabama Power is engaged, within the State of Alabama, in the generation, transmission, distribution, and purchase of electricity and the sale of electric service, at retail in approximately 400 cities and towns (including Anniston, Birmingham, Gadsden, Mobile, Montgomery, and Tuscaloosa), as well as in rural areas, and at wholesale to 11 municipally-owned electric distribution systems, all of which are served indirectly through sales to AMEA, and two rural distributing cooperative associations. The sales contract with AMEA is scheduled to expire on December 31, 2025. Alabama Power owns coal reserves near its Plant Gorgas site and uses the output of coal from the reserves in its generating plants. In addition, Alabama Power sells, and cooperates with dealers in promoting the sale of, electric appliances and products and also markets and sells outdoor lighting services.
Georgia Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within the State of Georgia, at retail in over 530 cities and towns (including Athens, Atlanta, Augusta, Columbus, Macon, Rome, and Savannah), as well as in rural areas, and at wholesale to OPC, MEAG Power, Dalton, various EMCs, and non-affiliated utilities. Georgia Power also markets and sells outdoor lighting services and other customer-focused utility services.
Mississippi Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within 23 counties in southeastern Mississippi, at retail in 123 communities (including Biloxi, Gulfport, Hattiesburg, Laurel, Meridian, and Pascagoula), as well as in rural areas, and at wholesale to one municipality, six rural electric distribution cooperative associations, and one generating and transmitting cooperative.
For information relating to KWH sales by customer classification for the traditional electric operating companies, see MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATIONS in Item 7 herein. For information relating to the number of retail customers served by customer classification for the traditional electric operating companies, see SELECTED FINANCIAL DATA of Southern Company and each traditional electric operating company in Item 6 herein. Also, for information relating to the sources of revenues for Southern Company, each traditional electric operating company, and Southern Power, see Item 7 herein and Note 1 to the financial statements under "RevenuesTraditional Electric Operating Companies" and " – Southern Power" and Note 4 to the financial statements in Item 8 herein.
As of December 31, 2019, there were approximately 62 electric cooperative distribution systems operating in the territories in which the traditional electric operating companies provide electric service at retail or wholesale.
One of these organizations, PowerSouth, is a generating and transmitting cooperative selling power to several distributing cooperatives, municipal systems, and other customers in south Alabama. As of December 31, 2019, PowerSouth owned generating units with approximately 2,100 MWs of nameplate capacity, including an undivided 8.16% ownership interest in Alabama Power's Plant Miller Units 1 and 2. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for details of Alabama Power's joint-ownership with PowerSouth of a portion of Plant Miller. Alabama Power has system supply agreements with PowerSouth to provide 200 MWs of year-round capacity service through January 31, 2024 and 200 MWs of winter-only capacity service through December 31, 2023. In August 2019, Alabama Power agreed to provide PowerSouth an additional 100 MWs of year-round capacity service from November 1, 2020 through February 28, 2023, with the option to extend through May 31, 2023.
Alabama Power has entered into a separate agreement with PowerSouth involving interconnection between their systems. The delivery of capacity and energy from PowerSouth to certain distributing cooperatives in the service territory of Alabama Power is governed by the Southern Company/PowerSouth Network Transmission Service Agreement. The rates for this service to PowerSouth are on file with the FERC.
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OPC is an EMC owned by its 38 retail electric distribution cooperatives, which provide retail electric service to customers in Georgia. OPC provides wholesale electric power to its members through its generation assets, some of which are jointly owned with Georgia Power, and power purchased from other suppliers. OPC and the 38 retail electric distribution cooperatives are members of Georgia Transmission Corporation, an EMC (GTC), which provides transmission services to its members and third parties. See PROPERTIES – "ElectricJointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information regarding Georgia Power's jointly-owned facilities.
Mississippi Power has an interchange agreement with Cooperative Energy, a generating and transmitting cooperative, pursuant to which various services are provided.
As of December 31, 2019, there were approximately 72 municipally-owned electric distribution systems operating in the territory in which the traditional electric operating companies provide electric service at retail or wholesale.
As of December 31, 2019, 48 municipally-owned electric distribution systems and one county-owned system received their requirements through MEAG Power, which was established by a Georgia state statute in 1975. MEAG Power serves these requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and purchases from other resources. MEAG Power also has a pseudo scheduling and services agreement with Georgia Power. Dalton serves its requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and through purchases from Southern Power through a service agreement. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
Georgia Power has entered into substantially similar agreements with GTC, MEAG Power, and Dalton providing for the establishment of an integrated transmission system to carry the power and energy of all parties. The agreements require an investment by each party in the integrated transmission system in proportion to its respective share of the aggregate system load. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information.
Southern Power has PPAs with Georgia Power, investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. See "The Southern Company System – Southern Power" herein and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Southern Power's Power Sales Agreements" in Item 7 herein for additional information.
SCS, acting on behalf of the traditional electric operating companies, also has a contract with SEPA providing for the use of the traditional electric operating companies' facilities at government expense to deliver to certain cooperatives and municipalities, entitled by federal statute to preference in the purchase of power from SEPA, quantities of power equivalent to the amounts of power allocated to them by SEPA from certain U.S. government hydroelectric projects.
Southern Company Gas
Southern Company Gas is engaged in the distribution of natural gas in four states through the natural gas distribution utilities. The natural gas distribution utilities construct, manage, and maintain intrastate natural gas pipelines and distribution facilities. Details of the natural gas distribution utilities at December 31, 2019 are as follows:
UtilityStateNumber of customers
Approximate miles of pipe
  (in thousands) 
Nicor GasIllinois2,245
34,346
Atlanta Gas LightGeorgia1,661
33,844
Virginia Natural GasVirginia303
5,719
Chattanooga GasTennessee68
1,676
Total 4,277
75,585
For information relating to the sources of revenue for Southern Company Gas, see Item 7 herein and Note 1 to the financial statements under "RevenuesSouthern Company Gas" and Note 4 to the financial statements in Item 8 herein.
Competition
Electric
The electric utility industry in the U.S. is continuing to evolve as a result of regulatory and competitive factors. The competition for retail energy sales among competing suppliers of energy is influenced by various factors, including price, availability, technological advancements, service, and reliability. These factors are, in turn, affected by, among other influences, regulatory, political, and environmental considerations, taxation, and supply.
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The retail service rights of all electric suppliers in the State of Georgia are regulated by the Territorial Electric Service Act of 1973. Pursuant to standards set forth in this Act, the Georgia PSC has assigned substantially all of the land area in the state to a supplier. Notwithstanding such assignments, this Act provides that any new customer locating outside of 1973 municipal limits and having a connected load of at least 900 KWs may exercise a one-time choice for the life of the premises to receive electric service from the supplier of its choice.
Pursuant to the 1956 Utility Act, the Mississippi PSC issued "Grandfather Certificates" of public convenience and necessity to Mississippi Power and to six distribution rural cooperatives operating in southeastern Mississippi, then served in whole or in part by Mississippi Power, authorizing them to distribute electricity in certain specified geographically described areas of the state. The six cooperatives serve approximately 325,000 retail customers in a certificated area of approximately 10,300 square miles. In areas included in a "Grandfather Certificate," the utility holding such certificate may extend or maintain its electric system subject to certain regulatory approvals; extensions of facilities by such utility, or extensions of facilities into that area by other utilities, may not be made unless the Mississippi PSC grants a CPCN. Areas included in a CPCN that are subsequently annexed to municipalities may continue to be served by the holder of the CPCN, irrespective of whether it has a franchise in the annexing municipality. On the other hand, the holder of the municipal franchise may not extend service into such newly annexed area without authorization by the Mississippi PSC.
Generally, the traditional electric operating companies have experienced, and expect to continue to experience, competition in their respective retail service territories in varying degrees from the development and deployment of alternative energy sources such as self-generation (as described below) and distributed generation technologies, as well as other factors.
Southern Power competes with investor-owned utilities, IPPs, and others for wholesale energy sales across various U.S. utility markets. The needs of these markets are driven by the demands of end users and the generation available. Southern Power's success in wholesale energy sales is influenced by various factors including reliability and availability of Southern Power's plants, availability of transmission to serve the demand, price, and Southern Power's ability to contain costs.
As of December 31, 2019, Alabama Power had cogeneration contracts in effect with six industrial customers. Under the terms of these contracts, Alabama Power purchases excess energy generated by such companies. During 2019, Alabama Power purchased approximately 123 million KWHs from such companies at a cost of $3 million.
As of December 31, 2019, Georgia Power had contracts in effect to purchase generation from 33 small IPPs. During 2019, Georgia Power purchased 2.7 billion KWHs from such companies at a cost of $176 million. Georgia Power also has PPAs for electricity with six cogeneration facilities. Payments are subject to reductions for failure to meet minimum capacity output. During 2019, Georgia Power purchased 390 million KWHs at a cost of $31 million from these facilities.
As of December 31, 2019, Mississippi Power had a cogeneration agreement in effect with one of its industrial customers. Under the terms of this contract, Mississippi Power purchases any excess generation. During 2019, Mississippi Power did not make any such purchases.
Natural Gas
Southern Company Gas' natural gas distribution utilities do not compete with other distributors of natural gas in their exclusive franchise territories but face competition from other energy products. Their principal competitors are electric utilities and fuel oil and propane providers serving the residential, commercial, and industrial markets in their service areas for customers who are considering switching to or from a natural gas appliance.
Competition for heating as well as general household and small commercial energy needs generally occurs at the initial installation phase when the customer or builder makes decisions as to which types of equipment to install. Customers generally use the chosen energy source for the life of the equipment.
Customer demand for natural gas could be affected by numerous factors, including:
changes in the availability or price of natural gas and other forms of energy;
general economic conditions;
energy conservation, including state-supported energy efficiency programs;
legislation and regulations;
the cost and capability to convert from natural gas to alternative energy products; and
technological changes resulting in displacement or replacement of natural gas appliances.
The natural gas-related programs generally emphasize natural gas as the fuel of choice for customers and seek to expand the use of natural gas through a variety of promotional activities. In addition, Southern Company Gas partners with third-party entities to market the benefits of natural gas appliances.
The availability and affordability of natural gas have provided cost advantages and further opportunity for growth of the businesses.
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Seasonality
The demand for electric power and natural gas supply is affected by seasonal differences in the weather. While the electric power sales of some electric utilities peak in the summer, others peak in the winter. In the aggregate, during normal weather conditions, the Southern Company system's electric power sales peak during both the summer and winter. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. As a result, the overall operating results of the Registrants in the future may fluctuate substantially on a seasonal basis. In addition, the Subsidiary Registrants have historically sold less power and natural gas when weather conditions are milder.
Regulation
States
The traditional electric operating companies and the natural gas distribution utilities are subject to the jurisdiction of their respective state PSCs or applicable state regulatory agencies. These regulatory bodies have broad powers of supervision and regulation over public utilities operating in the respective states, including their rates, service regulations, sales of securities (except for the Mississippi PSC), and, in the cases of the Georgia PSC and the Mississippi PSC, in part, retail service territories. See "Territory Served by the Southern Company System" and "Rate Matters" herein for additional information.
Federal Power Act
The traditional electric operating companies, Southern Power Company and certain of its generation subsidiaries, and SEGCO are all public utilities engaged in wholesale sales of energy in interstate commerce and, therefore, are subject to the rate, financial, and accounting jurisdiction of the FERC under the Federal Power Act. The FERC must approve certain financings and allows an "at cost standard" for services rendered by system service companies such as SCS and Southern Nuclear. The FERC is also authorized to establish regional reliability organizations which enforce reliability standards, address impediments to the construction of transmission, and prohibit manipulative energy trading practices.
Alabama Power and Georgia Power are also subject to the provisions of the Federal Power Act or the earlier Federal Water Power Act applicable to licensees with respect to their hydroelectric developments. As of December 31, 2019, among the hydroelectric projects subject to licensing by the FERC are 14 existing Alabama Power generating stations having an aggregate installed capacity of 1,670,000 KWs and 17 existing Georgia Power generating stations and one generating station partially owned by Georgia Power, with a combined aggregate installed capacity of 1,101,402 KWs.
In 2013, the FERC issued a new 30-year license to Alabama Power for Alabama Power's seven hydroelectric developments on the Coosa River (Weiss, Henry, Logan Martin, Lay, Mitchell, Jordan, and Bouldin). Alabama Power filed a petition requesting rehearing of the FERC order granting the relicense seeking revisions to several conditions of the license. In 2016, the FERC issued an order granting in part and denying in part Alabama Power's rehearing request. American Rivers and Alabama Rivers Alliance also filed multiple appeals of the FERC's 2013 order for the new 30-year license and, in July 2018, the U.S. Court of Appeals for the District of Columbia Circuit vacated the order and remanded the proceeding to the FERC. Alabama Power continues to operate the Coosa River developments under annual licenses issued by the FERC. The ultimate outcome of this matter cannot be determined at this time.
In 2019, Alabama Power continued the process of developing an application to relicense the Harris Dam project on the Tallapoosa River, which is expected to be filed with the FERC by November 30, 2021. The current Harris Dam project license will expire on November 30, 2023.
In May 2018, Georgia Power filed an application to relicense the Wallace Dam project on the Oconee River. The current Wallace Dam project license will expire on June 1, 2020. In July 2018, Georgia Power filed a Notice of Intent to relicense the Lloyd Shoals project on the Ocmulgee River. The application to relicense the Lloyd Shoals project is expected to be filed with the FERC by December 31, 2021. The current Lloyd Shoals project license will expire on December 31, 2023. In December 2018, Georgia Power filed applications to surrender the Langdale and Riverview hydroelectric projects on the Chattahoochee River upon their license expirations on December 31, 2023. Both projects together represent 1,520 KWs of Georgia Power's hydro fleet capacity.
Georgia Power and OPC also have a license, expiring in 2026, for the Rocky Mountain project, a pure pumped storage facility of 903,000 KW installed capacity. See PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information.
Licenses for all projects, excluding those discussed above, expire in the years 2034-2066 in the case of Alabama Power's projects and in the years 2035-2044 in the case of Georgia Power's projects.
Upon or after the expiration of each license, the U.S. Government, by act of Congress, may take over the project or the FERC may relicense the project either to the original licensee or to a new licensee. In the event of takeover or relicensing to another, the original licensee is to be compensated in accordance with the provisions of the Federal Power Act, such compensation to
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reflect the net investment of the licensee in the project, not in excess of the fair value of the property, plus reasonable damages to other property of the licensee resulting from the severance therefrom of the property. The FERC may grant relicenses subject to certain requirements that could result in additional costs.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Regulation
Alabama Power, Georgia Power, and Southern Nuclear are subject to regulation by the NRC. The NRC is responsible for licensing and regulating nuclear facilities and materials and for conducting research in support of the licensing and regulatory process, as mandated by the Atomic Energy Act of 1954, as amended; the Energy Reorganization Act of 1974, as amended; and the Nuclear Nonproliferation Act of 1978, as amended; and in accordance with the National Environmental Policy Act of 1969, as amended, and other applicable statutes. These responsibilities also include protecting public health and safety, protecting the environment, protecting and safeguarding nuclear materials and nuclear power plants in the interest of national security, and assuring conformity with antitrust laws.
The NRC licenses for Georgia Power's Plant Hatch Units 1 and 2 expire in 2034 and 2038, respectively. The NRC licenses for Alabama Power's Plant Farley Units 1 and 2 expire in 2037 and 2041, respectively. The NRC licenses for Plant Vogtle Units 1 and 2 expire in 2047 and 2049, respectively.
In 2012, the NRC issued combined construction and operating licenses (COLs) for Plant Vogtle Units 3 and 4. Receipt of the COLs allowed full construction to begin. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" in Item 7 herein and Note 2 to the financial statements under "Georgia PowerNuclear Construction" in Item 8 herein for additional information.
See Notes 3 and 6 to the financial statements under "Nuclear Insurance" and "Nuclear Decommissioning," respectively, in Item 8 herein for information on nuclear insurance and nuclear decommissioning costs.
Environmental Laws and Regulations
See "Construction Programs" herein, MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein, and Note 3 to the financial statements under "Environmental Remediation" and Note 6 to the financial statements in Item 8 herein for information concerning environmental laws and regulations impacting the Registrants.
Rate Matters
Rate Structure and Cost Recovery Plans
Electric
The rates and service regulations of the traditional electric operating companies are uniform for each class of service throughout their respective retail service territories. Rates for residential electric service are generally of the block type based upon KWHs used and include minimum charges. Residential and other rates contain separate customer charges. Rates for commercial service are presently of the block type and, for large customers, the billing demand is generally used to determine capacity and minimum bill charges. These large customers' rates are generally based upon usage by the customer and include rates with special features to encourage off-peak usage. Additionally, Alabama Power and Mississippi Power are generally allowed by their respective state PSCs to negotiate the terms and cost of service to large customers. Such terms and cost of service, however, are subject to final state PSC approval.
The traditional electric operating companies recover certain costs through a variety of forward-looking, cost-based rate mechanisms. Fuel and net purchased energy costs are recovered through specific fuel cost recovery provisions. These fuel cost recovery provisions are adjusted to reflect increases or decreases in such costs as needed or on schedules as required by the respective PSCs. Approved compliance, storm damage, and certain other costs are recovered at Alabama Power and Mississippi Power through specific cost recovery mechanisms approved by their respective PSCs. Certain similar costs at Georgia Power are recovered through various base rate tariffs as approved by the Georgia PSC. Costs not recovered through specific cost recovery mechanisms are recovered at Alabama Power and Mississippi Power through annual, formulaic cost recovery proceedings and at Georgia Power through periodic base rate proceedings.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters" in Item 7 herein and Note 2 to the financial statements in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms. Also, see "Integrated Resource Planning" herein for additional information.
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The traditional electric operating companies and Southern Power Company and certain of its generation subsidiaries are authorized by the FERC to sell power to non-affiliates, including short-term opportunity sales, at market-based prices. Specific FERC approval must be obtained with respect to a market-based contract with an affiliate.
Mississippi Power serves long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs, which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Natural Gas
Southern Company Gas' natural gas distribution utilities are subject to regulation and oversight by their respective state regulatory agencies. Rates charged to these customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide each natural gas distribution utility the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt, and provide a reasonable return.
With the exception of Atlanta Gas Light, which operates in a deregulated environment in which Marketers rather than a traditional utility sell natural gas to end-use customers and earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas.
The natural gas distribution utilities, excluding Atlanta Gas Light, are authorized to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities have other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters – Southern Company Gas" in Item 7 herein and Note 2 to the financial statements under "Southern Company Gas" in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms.
Integrated Resource Planning
Each of the traditional electric operating companies continually evaluates its electric generating resources in order to ensure that it maintains a cost-effective and reliable mix of resources to meet the existing and future demand requirements of its customers. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein for a discussion of existing and potential environmental regulations that may impact the future generating resource needs of the traditional electric operating companies.
Alabama Power
Triennially, Alabama Power provides an IRP report to the Alabama PSC. This report overviews Alabama Power's resource planning process and contains information that serves as the foundation for certain decisions affecting Alabama Power's portfolio of supply-side and demand-side resources. The IRP report facilitates Alabama Power's ability to provide reliable and cost-effective electric service to customers, while accounting for the risks and uncertainties inherent in planning for resources sufficient to meet expected customer demand. Under State of Alabama law, a CCN must be obtained from the Alabama PSC before Alabama Power constructs any new generating facility, unless such construction is deemed an ordinary extension in the usual course of business. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" in Item 8 herein for additional information.
Georgia Power
Triennially, Georgia Power must file an IRP with the Georgia PSC that specifies how it intends to meet the future electric service needs of its customers through a combination of demand-side and supply-side resources. The Georgia PSC, under state law, must certify any new demand-side or supply-side resources for Georgia Power to receive cost recovery. Once certified, the lesser of actual or certified construction costs and purchased power costs is recoverable through rates. Certified costs may be excluded from recovery only on the basis of fraud, concealment, failure to disclose a material fact, imprudence, or criminal misconduct. See Note 2 to the financial statements under "Georgia Power – Rate Plans" and " – Integrated Resource Plan." Also see Note 2 under and "Georgia PowerNuclear Construction" in Item 8 herein for additional information on the Georgia Nuclear Energy Financing Act and the Georgia PSC certification of Plant Vogtle Units 3 and 4, which allow Georgia Power to recover certain financing costs for construction of Plant Vogtle Units 3 and 4.
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Mississippi Power
In November 2019, the Mississippi PSC established the Integrated Resource Planning and Reporting Rule (IRP Rule), which is intended to allow electric utilities the flexibility to formulate long-term plans to best meet the needs of their customers through a combination of demand-side and supply-side resources and considering transmission needs. The IRP Rule establishes reporting requirements that include the filing of an IRP on a three-year cycle, with supply-side updates midway through the three-year cycle, and an annual report on energy delivery improvements. The IRP filing is not intended to supplant or replace the Mississippi PSC's existing regulatory processes for petition and approval of CCNs for new generating resources. Mississippi Power will file its first triennial IRP in compliance with the IRP Rule in April 2021.
In February 2018, the Mississippi PSC approved a settlement agreement related to cost recovery for the Kemper County energy facility, pursuant to which Mississippi Power filed a Reserve Margin Plan (RMP) in August 2018, which it updated on December 31, 2019. The ultimate outcome of this matter cannot be determined at this time. For additional information, see Note 2 to the financial statements under "Mississippi PowerReserve Margin Plan" in Item 8 herein.
Employee Relations
The Southern Company system had a total of 27,943 employees on its payroll at December 31, 2019.
Employees at
December 31, 2019
Alabama Power6,324
Georgia Power6,938
Mississippi Power1,030
PowerSecure910
SCS3,697
Southern Company Gas4,446
Southern Nuclear3,940
Southern Power460
Other198
Total27,943
The traditional electric operating companies and the natural gas distribution utilities have separate agreements with local unions of the IBEW and the Utilities Workers Union of America generally covering wages, working conditions, and procedures for handling grievances and arbitration. These agreements apply with certain exceptions to operating, maintenance, and construction employees.
Alabama Power has agreements with the IBEW in effect through August 14, 2025. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
Georgia Power has an agreement with the IBEW covering wages and working conditions, which is in effect through June 30, 2021.
Mississippi Power has an agreement with the IBEW covering wages and working conditions, which is in effect through May 1, 2024.
Southern Nuclear has a five-year agreement with the IBEW covering certain employees at Plants Hatch and Plant Vogtle Units 1 and 2, which is in effect through June 30, 2021. A five-year agreement between Southern Nuclear and the IBEW representing certain employees at Plant Farley is in effect through August 15, 2024. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
The agreements also make the terms of the pension plans for the companies discussed above subject to collective bargaining with the unions at either a five-year or a 10-year cycle, depending upon union and company actions.
The natural gas distribution utilities have separate agreements with different local unions of the IBEW covering wages, benefits, working conditions, and procedures for handling grievances and arbitration. Nicor Gas' agreement with the IBEW is effective through February 29, 2020 and negotiations on a new agreement commenced on January 9, 2020. Virginia Natural Gas' agreement with the IBEW is effective through May 15, 2020. Notice has been given to Virginia Natural Gas by the IBEW of their intent to negotiate changes to the agreement prior to the expiration date. A new IBEW local union was certified at Atlanta Gas Light in April 2018 and negotiations for a new agreement are ongoing.
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Item 1A. RISK FACTORS
In addition to the other information in this Form 10-K, includingMANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL in Item 7, and other documents filed by Southern Company and/or itssubsidiaries with the SEC from time to time, the following factors should becarefully considered in evaluating Southern Company and its subsidiaries. Suchfactors could affect actual results and cause results to differ materially fromthose expressed in any forward-looking statements made by, or on behalf of, SouthernCompany and/or its subsidiaries.
UTILITY REGULATORY, LEGISLATIVE, AND LITIGATION RISKS
Southern Company and its subsidiaries are subject to substantial federal, state, and local governmentalregulation, including with respect to rates. Compliance with current and future regulatory requirements andprocurement of necessary approvals, permits, and certificates may result insubstantial costs to Southern Company and its subsidiaries.
Laws and regulations govern the terms and conditions of the services the Southern Company system offers, protection of critical electric infrastructure assets, transmission planning, reliability, pipeline safety, interaction with wholesale markets, and relationships with affiliates, among other matters. The Registrants' businesses are subject to regulatory regimes which could result in substantial monetary penalties if a Registrant is found to be noncompliant.
The traditional electric operating companies and the natural gas distribution utilities seek to recover their costs, including compliance costs (including a reasonable return on invested capital), through their retail rates, which must be approved by the applicable state PSC or other applicable state regulatory agency. Such regulators, in a future rate proceeding, may alter the timing or amount of certain costs for which recovery is allowed or modify the current authorized rate of return. Rate refunds may also be required. Additionally, the rates charged to wholesale customers by the traditional electric operating companies and by Southern Power and the rates charged to natural gas transportation customers by Southern Company Gas' pipeline investments and for some of its storage assets must be approved by the FERC. These wholesale rates could be affected by changes to Southern Power's and the traditional electric operating companies' ability to conduct business pursuant to FERC market-based rate authority.
A small percentage of transmission revenues are collected through wholesale electric tariffs but the majority are collected through retail rates. FERC rules pertaining to regional transmission planning and cost allocation, which are intended to spur the development of new transmission infrastructure to promote the integration of renewable resources as well as facilitate competition in the wholesale market by providing more choices to wholesale customers, present challenges to transmission planning and the wholesale market structure.
The impact of any future revision or changes in interpretations of existing regulations or the adoption of new laws and regulations applicable to Southern Company or any of its subsidiaries is uncertain. Changes in regulation, the imposition of additional regulations, changes in enforcement practices of regulators, or penalties imposed for noncompliance with existing laws or regulations could influence the operating environment of Southern Company and its subsidiaries and may result in substantial costs or otherwise negatively affect their results of operations.
The Southern Company system's costs of compliance with environmental laws and satisfying related AROs are significant and could negatively impact the net income, cash flows, and financial condition of the Registrants.
The Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and other natural resources. Compliance with existing environmental requirements involves significant capital and operating costs including the settlement of AROs, a major portion of which is expected to be recovered through retail and wholesale rates. There is no assurance, however, that all such costs will be recovered. The Registrants expect future compliance expenditures will continue to be significant.
The EPA has adopted and is implementing regulations governing air quality under the Clean Air Act and water quality under the Clean Water Act, including regulations governing cooling water intake structures and effluent guidelines for steam electric generating plants. The EPA has also adopted regulations governing the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments at active generating power plants. The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule. The traditional electric operating companies will continue to periodically update their ARO cost estimates.
Additionally, environmental laws and regulations covering the handling and disposal of waste and release of hazardous substances could require the Southern Company system to incur substantial costs to clean up affected sites, including certain current and former operating sites, and locations subject to contractual obligations.
Litigation over environmental issues and claims of various types, including property damage, personal injury, and citizen enforcement of environmental requirements has occurred throughout the U.S. This litigation has included claims for damages
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alleged to have been caused by CO2 and other emissions, CCR, releases of regulated substances, and alleged exposure to regulated substances, and/or requests for injunctive relief in connection with such matters.
Compliance with any new or revised environmental laws or regulations could affect many areas of operations for the Southern Company system. The Southern Company system's ultimate environmental compliance strategy and future environmental expenditures will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed control technology, fuel prices, and the outcome of pending and/or future legal challenges. Compliance costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. Environmental compliance spending over the next several years may differ materially from the amounts estimated and could affect results of operations, cash flows, and/or financial condition if such costs cannot continue to be recovered on a timely basis. Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity and natural gas, which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to affect their demand for electricity or natural gas.
The Southern Company system may be exposed to regulatory and financial risks related to the impact of GHG legislation, regulation, and emission reduction goals.
Costs associated with GHG legislation, regulation, and emission reduction goals could be significant. Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy. However, the ultimate impact will depend on various factors, such as state adoption and implementation of requirements, low natural gas prices, the development, deployment, and advancement of relevant energy technologies, the ability to recover costs through existing ratemaking provisions, and the outcome of pending and/or future legal challenges.
Because natural gas is a fossil fuel with lower carbon content relative to other fossil fuels, future GHG constraints, including, but not limited to, the imposition of a carbon tax, may create additional demand for natural gas, both for production of electricity and direct use in homes and businesses. Future GHG constraints designed to minimize emissions from natural gas could likewise result in increased costs to the Southern Company system and affect the demand for natural gas as well as the prices charged to customers and the competitive position of natural gas.
In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. The Southern Company system's ability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies. The Southern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the use of natural gas for generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to lower GHG emissions. The Southern Company system is also evaluating methods of removing carbon from the atmosphere.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Global Climate Issues" in Item 7 herein for additional information.
OPERATIONAL RISKS
The financial performance of Southern Company and its subsidiaries may be adverselyaffected if the subsidiaries are unable to successfully operate their facilities or perform certain corporate functions.
The financial performance of Southern Company and its subsidiaries depends on the successful operation of the electric generation, transmission, and distribution facilities, natural gas distribution and storage facilities, and distributed generation storage technologies and the successful performance of necessary corporate functions. There are many risks that could affect these operations and performance of corporate functions, including operator error or failure of equipment or processes, accidents, operating limitations that may be imposed by environmental or other regulatory requirements or in connection with joint owner arrangements, labor disputes, physical attacks, fuel or material supply interruptions and/or shortages, transmission disruption or capacity constraints, including with respect to the Southern Company system's and third parties' transmission, storage, and transportation facilities, compliance with mandatory reliability standards, including mandatory cyber security standards, implementation of new technologies, information technology (IT) system failures, cyber intrusions, environmental events, such as spills or releases, and catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events, or other similar occurrences.
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A decrease or elimination of revenues from the electric generation, transmission, or distribution facilities or natural gas distribution or storage facilities or an increase in the cost of operating the facilities would reduce the net income and cash flows and could adversely impact the financial condition of the affected Registrant.
Operation of nuclear facilities involves inherent risks, including environmental,safety, health, regulatory, natural disasters, cyber intrusions or physical attacks, and financial risks, that could result in fines or theclosure of the nuclear units owned by Alabama Power or Georgia Powerand which may present potential exposures in excess of insurance coverage.
Alabama Power owns, and contracts for the operation of, two nuclear units and Georgia Power holds undivided interests in, and contracts for the operation of, four existing nuclear units. The six existing units are operated by Southern Nuclear and represented approximately 25% and 26% of the total KWHs generated by Alabama Power and Georgia Power, respectively, in the year ended December 31, 2019. In addition, Southern Nuclear, on behalf of Georgia Power and the other Vogtle Owners, is managing the construction of Plant Vogtle Units 3 and 4. Nuclear facilities are subject to environmental, safety, health, operational, and financial risks such as:
the potential harmful effects on the environment and human health and safety resulting from a release of radioactive materials;
uncertainties with respect to the ability to dispose of spent nuclear fuel and the need for longer term on-site storage;
uncertainties with respect to the technological and financial aspects of decommissioning nuclear plants at the end of licensed lives and the ability to maintain and anticipate adequate capital reserves for decommissioning;
limitations on the amounts and types of insurance commercially available to cover losses that might arise in connection with any nuclear operations; and
significant capital expenditures relating to maintenance, operation, security, and repair of these facilities.
Damages, decommissioning, or other costs could exceed the amount of decommissioning trusts or external insurance coverage, including statutorily required nuclear incident insurance.
The NRC has broad authority under federal law to impose licensing and safety-related requirements for the operation of nuclear facilities. In the event of non-compliance, the NRC has the authority to impose fines and/or shut down any unit, depending upon its assessment of the severity of the situation, until compliance is achieved. NRC orders or regulations related to increased security measures and any future NRC safety requirements could require Alabama Power and Georgia Power to make substantial operating and capital expenditures at their nuclear plants. In addition, if a serious nuclear incident were to occur, it could result in substantial costs to Alabama Power or Georgia Power and Southern Company. A major incident at a nuclear facility anywhere in the world could cause the NRC to delay or prohibit construction of new nuclear units or require additional safety measures at new and existing units. Moreover, a major incident at any nuclear facility in the U.S., including facilities owned and operated by third parties, could require Alabama Power and Georgia Power to make material contributory payments.
In addition, actual or potential threats of cyber intrusions or physical attacks could result in increased nuclear licensing or compliance costs that are difficult to predict.
Transporting and storing natural gas involves risks that may result in accidents and other operating risks and costs.
Southern Company Gas' natural gas distribution and storage activities involve a variety of inherent hazards and operating risks, such as leaks, accidents, explosions, and mechanical problems, which could result in serious injury, loss of life, significant damage to property, environmental pollution, and impairment of its operations. The location of pipelines and storage facilities near populated areas could increase the level of damage resulting from these risks. Additionally, these pipeline and storage facilities are subject to various state and other regulatory requirements. Failure to comply with these requirements could result in substantial monetary penalties or potential early retirement of storage facilities, which could trigger an associated impairment. The occurrence of any of these events not fully covered by insurance or otherwise could adversely affect Southern Company Gas' and Southern Company's financial condition and results of operations.
Physical attacks, both threatened and actual, could impact the ability of the Subsidiary Registrants to operate and could adversely affect financial results and liquidity.
The Subsidiary Registrants face the risk of physical attacks, both threatened and actual, against their respective generation and storage facilities and the transmission and distribution infrastructure used to transport energy, which could negatively impact their ability to generate, transport, and deliver power, or otherwise operate their respective facilities, or, with respect to Southern Company Gas, its ability to distribute or store natural gas, or otherwise operate its facilities, in the most efficient manner or at all. In addition, physical attacks against third-party providers could have a similar effect on the Southern Company system.
Despite the implementation of robust security measures, all assets are potentially vulnerable to disability, failures, or unauthorized access due to human error, natural disasters, technological failure, or internal or external physical attacks. If assets
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were to fail, be physically damaged, or be breached and were not restored in a timely manner, the affected Subsidiary Registrant may be unable to fulfill critical business functions. Moreover, the amount and scope of insurance maintained against losses resulting from any such events or physical security breaches may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result.
These events could harm the reputation of and negatively affect the financial results of the Registrants through lost revenues and costs to repair damage, if such costs cannot be recovered.
An information security incident, including a cybersecurity breach, or the failure of one or more key IT systems, networks, or processes could impact the ability of the Registrants to operate and could adversely affect financial results and liquidity.
Information security risks have generally increased in recent years as a result of the proliferation of new technology and increased sophistication and frequency of cyber attacks and data security breaches. The Subsidiary Registrants operate in highly regulated industries that require the continued operation of sophisticated IT systems and network infrastructure, which are part of interconnected distribution systems. Because of the critical nature of the infrastructure, increased connectivity to the internet, and technology systems' inherent vulnerability to disability or failures due to hacking, viruses, acts of war or terrorism, or other types of data security breaches, the Southern Company system faces a heightened risk of cyberattack. Parties that wish to disrupt the U.S. bulk power system or Southern Company system operations could view these computer systems, software, or networks as targets. The Registrants and their third-party vendors have been subject, and will likely continue to be subject, to attempts to gain unauthorized access to their IT systems and confidential data or to attempts to disrupt utility operations. As a result, Southern Company and its subsidiaries face on-going threats to their assets, including assets deemed critical infrastructure, where databases and systems have been, and will likely continue to be, subject to advanced computer viruses or other malicious codes, unauthorized access attempts, phishing, and other cyber attacks. While there have been immaterial incidents of phishing and attempted financial fraud across the Southern Company system, there has been no material impact on business or operations from these attacks. However, the Registrants cannot guarantee that security efforts will prevent breaches, operational incidents, or other breakdowns of IT systems and network infrastructure and cannot provide any assurance that such incidents will not have a material adverse effect in the future.
In addition, in the ordinary course of business, Southern Company and its subsidiaries collect and retain sensitive information, including personally identifiable information about customers, employees, and stockholders, and other confidential information. In some cases, administration of certain functions may be outsourced to third-party service providers that could also be targets of cyber attacks.
Despite the implementation of robust security measures, all assets are potentially vulnerable to internal or external cyber attacks, which may inhibit the affected Registrant's ability to fulfill critical business functions and compromise sensitive and other data. Any cyber breach or theft, damage, or improper disclosure of sensitive electronic data may also subject the affected Registrant to penalties and claims from regulators or other third parties. Moreover, the amount and scope of insurance may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result. In addition, as cybercriminals become more sophisticated, the cost of proactive defensive measures may increase.
These events could negatively affect the financial results of the Registrants through lost revenues, costs to recover and repair damage, costs associated with governmental actions in response to such attacks, and litigation costs if such costs cannot be recovered through insurance or otherwise.
The Southern Company system may not be able to obtainadequate natural gas, fuel supplies, and other resources required to operate the traditional electric operating companies' and Southern Power's electric generating plants or serve Southern Company Gas' natural gas customers.
The traditional electric operating companies and Southern Power purchase fuel from a number of suppliers. The traditional electric operating companies and Southern Power also need adequate access to water, which is drawn from nearby sources, to aid in the production of electricity and, once it is used, returned to its source. Disruption in the delivery of fuel, including disruptions as a result of, among other things, transportation delays, weather, labor relations, force majeure events, or environmental regulations affecting fuel suppliers, or the availability of water, could limit the ability of the traditional electric operating companies and Southern Power to operate certain facilities, which could result in higher fuel and operating costs and potentially reduce the net income of the affected traditional electric operating company or Southern Power and Southern Company.
Natural gas supplies can be subject to disruption in the event production or distribution is curtailed, such as in the event of a hurricane or a pipeline failure. The Southern Company system also relies on natural gas pipelines and other storage and transportation facilities owned and operated by third parties to deliver natural gas to wholesale markets and to its distribution
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systems. The availability of shale gas and potential regulations affecting its accessibility may have a material impact on the supply and cost of natural gas. Disruption in natural gas supplies could limit the ability to fulfill contractual obligations.
The traditional electric operating companies and Southern Power have become more dependent on natural gas for a majority of their electric generating capacity and expect to continue to increase such dependence. In many instances, the cost of purchased power is influenced by natural gas prices. Historically, natural gas prices have been more volatile than prices of other fuels. In recent years, domestic natural gas prices have been depressed by robust supplies, including production from shale gas. These market conditions, together with additional regulation of coal-fired generating units, have increased the traditional electric operating companies' reliance on natural gas-fired generating units.
The traditional electric operating companies are also dependent on coal for a portion of their electric generating capacity. The traditional electric operating companies depend on coal supply contracts, and the counterparties to these agreements may not fulfill their obligations to supply coal because of financial or technical problems. In addition, the suppliers may not be required to supply coal under certain circumstances, such as in the event of a natural disaster. If the traditional electric operating companies are unable to obtain their contracted coal requirements, they may be required to purchase their coal requirements at higher prices, which may not be recoverable through rates.
The revenues of Southern Company, the traditional electric operating companies, and SouthernPower depend inpart on sales under PPAs. The failure of a PPA counterparty toperform its obligations, the failure of a Southern Company subsidiary to satisfy minimum requirements under the PPAs, or the failure to renew the PPAs or successfully remarket the related generating capacity could have a negativeimpact on the net income and cash flows of the affected traditional electric operating companyor Southern Power and/or of Southern Company.
Most of Southern Power's generating capacity has been sold to purchasers under PPAs. Southern Power's top three customers, Georgia Power, Southern California Edison, and Morgan Stanley Capital Group accounted for 9.0%, 6.8%, and 4.9%, respectively, of Southern Power's total revenues for the year ended December 31, 2019. The traditional electric operating companies have entered into PPAs with non-affiliated parties.
The revenues related to PPAs are dependent on the continued performance by the purchasers of their obligations. The failure of a purchaser to perform its obligations, including as a result of a general default or bankruptcy, could have a negative impact on the net income and cash flows of the affected traditional electric operating company or Southern Power and of Southern Company. Although the credit evaluations undertaken and contractual protections implemented by Southern Power and the traditional electric operating companies take into account the possibility of default by a purchaser, actual exposure to a default by a purchaser may be greater than predicted or specified in the applicable contract. See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in Item 8 herein for additional information on the potential impacts of Pacific Gas & Electric Company's bankruptcy filing.
Additionally, neither Southern Power nor any traditional electric operating company can predict whether the PPAs will be renewed at the end of their respective terms or on what terms any renewals may be made. The failure of a Southern Company subsidiary to satisfy minimum operational or availability requirements under these PPAs, including PPAs related to fuel cell technology, could result in payment of damages or termination of the PPAs.
The asset management arrangements between Southern Company Gas' wholesale gas services and its customers, including the natural gas distribution utilities, may not be renewed or may be renewed at lower levels, which could have a significant impact on Southern Company Gas' financial results.
Southern Company Gas' wholesale gas services currently manages the storage and transportation assets of the natural gas distribution utilities (except Nicor Gas) as well as certain non-affiliated customers. Southern Company Gas' wholesale gas services has a concentration of credit risk for services it provides to its counterparties, which is generally concentrated in 20 of its counterparties.
The profits earned from the management of affiliate assets are shared with the respective affiliate's customers (and for Atlanta Gas Light with the Georgia PSC's Universal Service Fund), except for Chattanooga Gas where wholesale gas services are provided under annual fixed-fee agreements. These asset management agreements are subject to regulatory approval and such agreements may not be renewed or may be renewed with less favorable terms.
The financial results of Southern Company Gas' wholesale gas services could be significantly impacted if any of its agreements with its affiliated or non-affiliated customers are not renewed or are amended or renewed with less favorable terms. Sustained low natural gas prices could reduce the demand for these types of asset management arrangements.
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Increased competition from other companies that supply energy or generation and storage technologies could negatively impact Southern Company's and its subsidiaries' revenues, results of operations, and financial condition.
A key element of the business models of the traditional electric operating companies and Southern Power is that generating power at central station power plants achieves economies of scale and produces power at a competitive cost. Advances in technology or changes in laws or regulations could reduce the cost of distributed generation storage technologies or other alternative methods of producing power to a level that is competitive with that of most central station power electric production or result in smaller-scale, more fuel efficient, and/or more cost effective distributed generation that allows for increased self-generation by customers. Broader use of distributed generation by retail energy customers may also result from customers' changing perceptions of the merits of utilizing existing generation technology or tax or other economic incentives. Additionally, a state PSC or legislature may modify certain aspects of the traditional electric operating companies' business as a result of these advances in technology.
It is also possible that rapid advances in central station power generation technology could reduce the value of the current electric generating facilities owned by the traditional electric operating companies and Southern Power. Changes in technology could also alter the channels through which electric customers buy or utilize power, which could reduce the revenues or increase the expenses of Southern Company, the traditional electric operating companies, or Southern Power.
Southern Company Gas' business is dependent on natural gas prices remaining competitive as compared to other forms of energy. Southern Company Gas' gas marketing services segment also is affected by competition from other energy marketers providing similar services in Southern Company Gas' unregulated service territories, most notably in Illinois and Georgia. Southern Company Gas' wholesale gas services competes for sales with national and regional full-service energy providers, energy merchants and producers, and pipelines based on the ability to aggregate competitively-priced commodities with transportation and storage capacity. Southern Company Gas competes with natural gas facilities in the Gulf Coast region of the U.S., as the majority of the existing and proposed high deliverability salt-dome natural gas storage facilities in North America are located in the Gulf Coast region.
If new technologies become cost competitive and achieve sufficient scale, the market share of the Subsidiary Registrants could be eroded, and the value of their respective electric generating facilities or natural gas distribution and storage facilities could be reduced. Additionally, Southern Company Gas' market share could be reduced if Southern Company Gas cannot remain price competitive in its unregulated markets. If state PSCs or other applicable state regulatory agencies fail to adjust rates to reflect the impact of any changes in loads, increasing self-generation, and the growth of distributed generation, the financial condition, results of operations, and cash flows of Southern Company and the affected traditional electric operating company or Southern Company Gas could be materially adversely affected.
Failure to attract and retain an appropriately qualified workforce could negatively impact Southern Company's and its subsidiaries' results of operations.
Events such as an aging workforce without appropriate replacements, mismatch of skill sets to future needs, or unavailability of contract resources may lead to operating challenges such as lack of resources, loss of knowledge, and a lengthy time period associated with skill development, including with the workforce needs associated with major construction projects and ongoing operations. The Southern Company system's costs, including costs for contractors to replace employees, productivity costs, and safety costs, may rise. Failure to hire and adequately obtain replacement employees, including the ability to transfer significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect Southern Company and its subsidiaries' ability to manage and operate their businesses.
As a result of the increased demand for skilled linemen in California and the Northeast, portions of the Southern Company system experienced higher than normal turnover in 2019. The Southern Company system is diligently working to attract and train qualified linemen.
If Southern Company and its subsidiaries are unable to successfully attract and retain an appropriately qualified workforce, results of operations could be negatively impacted.
CONSTRUCTION RISKS
The Registrants have incurred and may incuradditional costs or delays in the construction of new plants or other facilities and may not be able to recover their investments. Also, existing facilities ofthe Subsidiary Registrants requireongoing expenditures, including those to meet AROs and other environmental standards and goals.
General
The businesses of the Registrants require substantial expenditures for investments in new facilities and, for the traditional electric operating companies, capital improvements to transmission, distribution, and generation facilities, for Southern Power, capital improvements to generation facilities, and, for Southern Company Gas, capital improvements to natural gas distribution
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and storage facilities. These expenditures also include those to settle AROs and meet environmental standards and goals. The traditional electric operating companies and Southern Power are in the process of constructing new generating facilities and adding environmental modifications to certain existing generating facilities. The traditional electric operating companies also are in the process of closing ash ponds to comply with the CCR Rule and, where applicable, state CCR rules. Southern Company Gas is replacing certain pipelines in its natural gas distribution system and is involved in two new gas pipeline construction projects. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations. These projects are long term in nature and in some cases may include the development and construction of facilities with designs that have not been finalized or previously constructed. The completion of these types of projects without delays or significant cost overruns is subject to substantial risks that have occurred or may occur, including:
shortages, delays, increased costs, or inconsistent quality of equipment, materials, and labor;
challenges with management of contractors, subcontractors, or vendors;
work stoppages;
contractor or supplier delay;
nonperformance under construction, operating, or other agreements;
delays in or failure to receive necessary permits, approvals, tax credits, and other regulatory authorizations;
challenges with start-up activities (including major equipment failure, system integration, or regional transmission upgrades) and/or operational performance;
operational readiness, including specialized operator training and required site safety programs;
impacts of new and existing laws and regulations, including environmental laws and regulations;
the outcome of any legal challenges to projects, including legal challenges to regulatory approvals;
failure to construct in accordance with permits and licenses (including satisfaction of NRC requirements);
failure to satisfy any environmental performance standards and the requirements of tax credits and other incentives;
continued public and policymaker support for projects;
adverse weather conditions or natural disasters;
engineering or design problems;
design and other licensing-based compliance matters;
environmental and geological conditions;
delays or increased costs to interconnect facilities to transmission grids; and
increased financing costs as a result of changes in market interest rates or as a result of project delays.
If a Subsidiary Registrant is unable to complete the development or construction of a project or decides to delay or cancel construction of a project, it may not be able to recover its investment in that project and may incur substantial cancellation payments under equipment purchase orders or construction contracts, as well as other costs associated with the closure and/or abandonment of the construction project.
In addition, partnership and joint ownership agreements may provide partners or co-owners with certain decision-making authority in connection with projects under construction, including rights to cause the cancellation of a construction project under certain circumstances. Any failure by a partner or co-owner to perform its obligations under the applicable agreements could have a material negative impact on the applicable project under construction. Certain Southern Company Gas pipeline development projects involve separate joint venture participants that own a majority of the project, Southern Power participates in partnership agreements with respect to a majority of its renewable energy projects, Georgia Power jointly owns Plant Vogtle Units 3 and 4 with other co-owners, and Mississippi Power jointly owns Plant Daniel with Gulf Power. See Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information regarding jointly-owned facilities.
If construction projects are not completed according to specification, a Registrant may incur liabilities and suffer reduced plant efficiency, higher operating costs, and reduced net income. Furthermore, construction delays associated with renewable projects could result in the loss of otherwise available tax credits and incentives.
Even if a construction project (including a joint venture construction project) is completed, the total costs may be higher than estimated and may not be recoverable through regulated rates, if applicable. In addition, construction delays and contractor performance shortfalls can result in the loss of revenues and may, in turn, adversely affect the net income and financial position of the affected Registrant. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. Southern Company and Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in 2018 to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See Note 2 to the financial statements under "Georgia Power – Nuclear Construction" in Item 8 herein for information regarding Plant Vogtle Units 3 and 4. Also see Note 3 to the financial statements under "Other MattersSouthern Company
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GasGas Pipeline Projects" for information regarding the construction delays and the associated cost increases for Southern Company Gas' pipeline construction projects and Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding the proposed sale of Southern Company Gas' interests in Atlantic Coast Pipeline.
Once facilities become operational, ongoing capital expenditures are required to maintain reliable levels of operation. Significant portions of the traditional electric operating companies' existing facilities were constructed many years ago. Older equipment, even if maintained in accordance with good engineering practices, may require significant expenditures to maintain efficiency, to comply with changing environmental requirements, to provide safe and reliable operations, and/or to meet related retirement obligations.
Southern Company Gas' significant investments in pipelines and pipeline development projects involve financial and execution risks.
Southern Company Gas has made significant investments in existing pipelines and pipeline development projects. Many of the existing pipelines are, and, when completed, the pipeline development projects will be, operated by third parties. If one of these agents fails to perform in a proper manner, the value of the investment could decline and Southern Company Gas could lose part or all of its investment. In addition, Southern Company Gas is required to fulfill capital obligations to pipeline joint ventures or, as necessary, guarantee the obligations of such joint venture.
With respect to certain pipeline development projects, Southern Company Gas will rely on its joint venture partners for construction management and will not exercise direct control over the process. All of the pipeline development projects are dependent on contractors for the successful and timely completion of the projects. Further, the development of pipeline projects involves numerous regulatory, environmental, construction, safety, political, and legal uncertainties and may require the expenditure of significant amounts of capital. These projects may not be completed on schedule, at the budgeted cost, or at all. There may be cost overruns and construction difficulties that cause Southern Company Gas' capital expenditures to exceed its initial expectations, which may impact the earnings of the joint venture partnerships. Moreover, Southern Company Gas' income will not increase immediately upon the expenditure of funds on a pipeline project. Pipeline construction occurs over an extended period of time and Southern Company Gas will not receive material increases in income until the project is placed in service.
At December 31, 2019, Southern Company Gas was involved in two gas pipeline development projects, the Atlantic Coast Pipeline project and the PennEast Pipeline project. See Note 3 to the financial statements under "Other Matters – Southern Company Gas – Gas Pipeline Projects" in Item 8 herein for information regarding these projects and Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding the proposed sale of Southern Company Gas' interests in Atlantic Coast Pipeline.
FINANCIAL, ECONOMIC, AND MARKET RISKS
The electric generation and energy marketing operations of the traditional electric operating companies and Southern Power and the natural gas operations of Southern Company Gas are subject to risks, many of which are beyondtheir control, including changes in energy prices and fuel costs, which may reduce revenues and increase costs.
The generation, energy marketing, and natural gas operations of the Southern Company system are subject to changes in energy prices and fuel costs, which could increase the cost of producing power, decrease the amount received from the sale of energy, and/or make electric generating facilities less competitive. The market prices for these commodities may fluctuate significantly over relatively short periods of time. Among the factors that could influence energy prices and fuel costs are:
prevailing market prices for coal, natural gas, uranium, fuel oil, and other fuels, as applicable, used in the generation facilities of the traditional electric operating companies and Southern Power and, in the case of natural gas, distributed by Southern Company Gas, including associated transportation costs, and supplies of such commodities;
demand for energy and the extent of additional supplies of energy available from current or new competitors;
liquidity in the general wholesale electricity and natural gas markets;
weather conditions impacting demand for electricity and natural gas;
seasonality;
transmission or transportation constraints, disruptions, or inefficiencies;
availability of competitively priced alternative energy sources;
forced or unscheduled plant outages for the Southern Company system, its competitors, or third party providers;
the financial condition of market participants;
the economy in the Southern Company system's service territory, the nation, and worldwide, including the impact of economic conditions on demand for electricity and the demand for fuels, including natural gas;
natural disasters, wars, embargos, physical or cyber attacks, and other catastrophic events; and
federal, state, and foreign energy and environmental regulation and legislation.
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These factors could increase the expenses and/or reduce the revenues of the Registrants. For the traditional electric operating companies and Southern Company Gas' regulated gas distribution operations, such impacts may not be fully recoverable through rates.
Historically, the traditional electric operating companies and Southern Company Gas from time to time have experienced underrecovered fuel and/or purchased gas cost balances and may experience such balances in the future. While the traditional electric operating companies and Southern Company Gas are generally authorized to recover fuel and/or purchased gas costs through cost recovery clauses, recovery may be denied if costs are deemed to be imprudently incurred and there may be delays in the authorization of such recovery. These factors could negatively impact the cash flows of the affected traditional electric operating company or Southern Company Gas and of Southern Company.
The Registrants are subject to risks associated with a changing economic environment, customer behaviors, including increased energy conservation, and adoption patterns of technologies by the customers of the Subsidiary Registrants.
The consumption and use of energy are linked to economic activity. This relationship is affected over time by changes in the economy, customer behaviors, and technologies. Any economic downturn could negatively impact customer growth and usage per customer, thus reducing the sales of energy and revenues. Additionally, any economic downturn or disruption of financial markets, both nationally and internationally, could negatively affect the financial stability of customers and counterparties of the Subsidiary Registrants.
Outside of economic disruptions, changes in customer behaviors in response to energy efficiency programs, changing conditions and preferences, or changes in the adoption of technologies could affect the relationship of economic activity to the consumption of energy. For example, some cities in the United States recently banned the use of natural gas in new construction.
Both federal and state programs exist to influence how customers use energy, and several of the traditional electric operating companies and Southern Company Gas have PSC or other applicable state regulatory agency mandates to promote energy efficiency. Conservation programs could impact the financial results of the Registrants in different ways. For example, if any traditional electric operating company or Southern Company Gas is required to invest in conservation measures that result in reduced sales from effective conservation, regulatory lag in adjusting rates for the impact of these measures could have a negative financial impact on such traditional electric operating company or Southern Company Gas and Southern Company. Customers could also voluntarily reduce their consumption of energy in response to decreases in their disposable income, increases in energy prices, or individual conservation efforts.
In addition, the adoption of technology by customers can have both positive and negative impacts on sales. Many new technologies utilize less energy than in the past. However, electric and natural gas technologies such as electric and natural gas vehicles can create additional demand. The Southern Company system uses best available methods and experience to incorporate the effects of changes in customer behavior, state and federal programs, PSC or other applicable state regulatory agency mandates, and technology, but the Southern Company system's planning processes may not estimate and incorporate these effects.
All of the factors discussed above could adversely affect a Registrant's results of operations, financial condition, and liquidity.
The operating results of the Registrants are affected by weather conditions and may fluctuate on a seasonal basis. In addition, catastrophic events could result in substantial damage to or limit the operation of the properties of a Subsidiary Registrant and could negatively impact results of operation, financial condition, and liquidity.
Electric power and natural gas supply are generally seasonal businesses. In the aggregate, during normal weather conditions, the Southern Company system's electric power sales peak during both the summer and winter. Additionally, Southern Power has variability in its revenues from renewable generation facilities due to seasonal weather patterns primarily from wind and sun. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. In addition, the Subsidiary Registrants have historically sold less power and natural gas when weather conditions are milder. Unusually mild weather in the future could reduce the revenues, net income, and available cash of the affected Registrant.
Volatile or significant weather events could result in substantial damage to the transmission and distribution lines of the traditional electric operating companies, the generating facilities of the traditional electric operating companies and Southern Power, and the natural gas distribution and storage facilities of Southern Company Gas. The Subsidiary Registrants have significant investments in the Atlantic and Gulf Coast regions and Southern Power and Southern Company Gas have investments in various states which could be subject to severe weather and natural disasters, including hurricanes and wildfires. Further, severe drought conditions can reduce the availability of water and restrict or prevent the operation of certain generating facilities.
In the event a traditional electric operating company or Southern Company Gas experiences any of these weather events or any natural disaster or other catastrophic event, recovery of costs in excess of reserves and insurance coverage is subject to the
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approval of its state PSC or other applicable state regulatory agency. Historically, the traditional electric operating companies from time to time have experienced deficits in their storm cost recovery reserve balances and may experience such deficits in the future. Any denial by the applicable state PSC or other applicable state regulatory agency or delay in recovery of any portion of such costs could have a material negative impact on a traditional electric operating company's or Southern Company Gas' and on Southern Company's results of operations, financial condition, and liquidity.
In addition, damages resulting from significant weather events within the service territory of any traditional electric operating company or Southern Company Gas or affecting Southern Power's customers may result in the loss of customers and reduced demand for energy for extended periods and may impact customers' ability to perform under existing PPAs. See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing. Any significant loss of customers or reduction in demand for energy could have a material negative impact on a Registrant's results of operations, financial condition, and liquidity.
Acquisitions, dispositions, or other strategic ventures or investments may not result in anticipated benefits and may present risks not originally contemplated, which may have a material adverse effect on the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
Southern Company and its subsidiaries have made significant acquisitions and investments in the past, as well as dispositions, and may in the future make additional acquisitions, dispositions, or other strategic ventures or investments, including the pending disposition by Southern Company Gas of its interests in Pivotal LNG and Atlantic Coast Pipeline, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries. Southern Company and its subsidiaries continually seek opportunities to create value through various transactions, including acquisitions or sales of assets. Specifically, Southern Power continually seeks opportunities to execute its strategy to create value through various transactions, including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Southern Company and its subsidiaries may face significant competition for transactional opportunities and anticipated transactions may not be completed on acceptable terms or at all. In addition, these transactions are intended to, but may not, result in the generation of cash or income, the realization of savings, the creation of efficiencies, or the reduction of risk. These transactions may also affect the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
These transactions also involve risks, including:
they may not result in an increase in income or provide adequate or expected funds or return on capital or other anticipated benefits;
they may result in Southern Company or its subsidiaries entering into new or additional lines of business, which may have new or different business or operational risks;
they may not be successfully integrated into the acquiring company's operations and/or internal control processes;
the due diligence conducted prior to a transaction may not uncover situations that could result in financial or legal exposure or may not appropriately evaluate the likelihood or quantify the exposure from identified risks;
they may result in decreased earnings, revenues, or cash flow;
they may involve retained obligations in connection with transitional agreements or deferred payments related to dispositions that subject Southern Company or its subsidiaries to additional risk;
Southern Company or the applicable subsidiary may not be able to achieve the expected financial benefits from the use of funds generated by any dispositions;
expected benefits of a transaction may be dependent on the cooperation, performance, or credit risk of a counterparty; or
for the traditional electric operating companies and Southern Company Gas, costs associated with such investments that were expected to be recovered through regulated rates may not be recoverable.
Southern Company and Southern Company Gas are holding companies and Southern Power owns many of its assets indirectly through subsidiaries. Each of these companies is dependent on cash flows from their respective subsidiaries to meet their ongoing and future financial obligations, including making interest and principal payments on outstanding indebtedness and, for Southern Company, to pay dividends on its common stock.
Southern Company and Southern Company Gas are holding companies and, as such, they have no operations of their own. Substantially all of Southern Company's and Southern Company Gas' and many of Southern Power's respective consolidated assets are held by subsidiaries. Southern Company's, Southern Company Gas' and, to a certain extent, Southern Power's ability to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and, for Southern Company, to pay dividends on its common stock, is dependent on the net income and cash flows of their
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respective subsidiaries and the ability of those subsidiaries to pay upstream dividends or to repay borrowed funds. Prior to funding Southern Company, Southern Company Gas, or Southern Power, the respective subsidiaries have financial obligations and, with respect to Southern Company and Southern Company Gas, regulatory restrictions that must be satisfied, including among others, debt service and preferred stock dividends. In addition, Southern Company, Southern Company Gas, and Southern Power may provide capital contributions or debt financing to subsidiaries under certain circumstances, which would reduce the funds available to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and to pay dividends on Southern Company's common stock.
A downgrade in the credit ratings of any of the Registrants, Southern Company Gas Capital, or Nicor Gas could negatively affect their ability to access capital at reasonable costs and/or could require posting of collateral or replacing certain indebtedness.
There are a number of factors that rating agencies evaluate to arrive at credit ratings for the Registrants, Southern Company Gas Capital, and Nicor Gas, including capital structure, regulatory environment, the ability to cover liquidity requirements, and other commitments for capital. The Registrants, Southern Company Gas Capital, and Nicor Gas could experience a downgrade in their ratings if any rating agency concludes that the level of business or financial risk of the industry or the applicable company has deteriorated. Changes in ratings methodologies by the agencies could also have a negative impact on credit ratings. If one or more rating agencies downgrade any Registrant, Southern Company Gas Capital, or Nicor Gas borrowing costs likely would increase, including automatic increases in interest rates under applicable term loans and credit facilities, the pool of investors and funding sources would likely decrease, and, particularly for any downgrade to below investment grade, significant collateral requirements may be triggered in a number of contracts. Any credit rating downgrades could require altering the mix of debt financing currently used, and could require the issuance of secured indebtedness and/or indebtedness with additional restrictive covenants binding the applicable company.
Uncertainty in demand for energy can result in lower earnings or higher costs. If demand for energy falls short of expectations, it could result in potentially stranded assets. If demand for energy exceeds expectations, it could result in increased costs forpurchasing capacity in the open market or building additional electric generation and transmissionfacilities or natural gas distribution and storage facilities.
Southern Company, the traditional electric operating companies, and Southern Power each engage in a long-term planning process to estimate the optimal mix and timing of new generation assets required to serve future load obligations. Southern Company Gas engages in a long-term planning process to estimate the optimal mix and timing of building new pipelines and storage facilities, replacing existing pipelines, rewatering storage facilities, and entering new markets and/or expanding in existing markets. These planning processes must look many years into the future in order to accommodate the long lead times associated with the permitting and construction of new generation and associated transmission facilities and natural gas distribution and storage facilities. Inherent risk exists in predicting demand as future loads are dependent on many uncertain factors, including economic conditions, customer usage patterns, efficiency programs, and customer technology adoption. Because regulators may not permit the traditional electric operating companies or Southern Company Gas' regulated operating companies to adjust rates to recover the costs of new generation and associated transmission assets and/or new pipelines and related infrastructure in a timely manner or at all, these subsidiaries may not be able to fully recover these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs and the recovery in customers' rates. In addition, under Southern Power's model of selling capacity and energy at negotiated market-based rates under long-term PPAs, Southern Power might not be able to fully execute its business plan if market prices drop below original forecasts. Southern Power and/or the traditional electric operating companies may not be able to extend existing PPAs or find new buyers for existing generation assets as existing PPAs expire, or they may be forced to market these assets at prices lower than originally intended. These situations could have negative impacts on net income and cash flows for the affected Registrant.
The traditional electric operating companies are currently obligated to supply power to retail customers and wholesale customers under long-term PPAs. Southern Power is currently obligated to supply power to wholesale customers under long-term PPAs. At peak times, the demand for power required to meet this obligation could exceed the Southern Company system's available generation capacity. Market or competitive forces may require that the traditional electric operating companies purchase capacity on the open market or build additional generation and transmission facilities and that Southern Power purchase energy or capacity on the open market. Because regulators may not permit the traditional electric operating companies to pass all of these purchase or construction costs on to their customers, the traditional electric operating companies may not be able to recover some or all of these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs of purchased or constructed capacity and the traditional electric operating companies' recovery in customers' rates. Under Southern Power's long-term fixed price PPAs, Southern Power may not be able to recover all of these costs. These situations could have negative impacts on net income and cash flows for the affected Registrant.
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The businesses of the Registrants, SEGCO, and Nicor Gas are dependent on their ability to successfully access funds through capital markets and financial institutions. Theinability of any of the Registrants, SEGCO, or Nicor Gas to access funds may limit its ability to execute its business plan by impacting its ability to fund capital investments or acquisitions that it may otherwise rely on to achieve future earnings and cash flows.
The Registrants, SEGCO, and Nicor Gas rely on access to both short-term money markets and longer-term capital markets as a significant source of liquidity for capital requirements not satisfied by the cash flow from their respective operations. If any of the Registrants, SEGCO, or Nicor Gas is not able to access capital at competitive rates or on favorable terms, its ability to implement its business plan will be limited by impacting its ability to fund capital investments or acquisitions that it may otherwise rely on to achieve future earnings and cash flows. In addition, the Registrants, SEGCO, and Nicor Gas rely on committed bank lending agreements as back-up liquidity which allows them to access low cost money markets. Each of the Registrants, SEGCO, and Nicor Gas believes that it will maintain sufficient access to these financial markets based upon current credit ratings. However, certain events or market disruptions may increase the cost of borrowing or adversely affect the ability to raise capital through the issuance of securities or other borrowing arrangements or the ability to secure committed bank lending agreements used as back-up sources of capital. Such disruptions could include an economic downturn or uncertainty; bankruptcy or financial distress at an unrelated energy company, financial institution, or sovereign entity; capital markets volatility and disruption, either nationally or internationally; changes in tax policy; volatility in market prices for electricity and natural gas; actual or threatened cyber or physical attacks on the Southern Company system's facilities or unrelated energy companies' facilities; war or threat of war; or the overall health of the utility and financial institution industries.
Additionally, due to a portion of the Registrants' indebtedness bearing interest at fluctuating rates based on LIBOR or other benchmark rates, the potential phasing out of these rates may adversely affect the costs of financing. The discontinuation, reform, or replacement of LIBOR or any other benchmark rates may have an unpredictable impact on contractual relationships in the credit markets or cause disruption to the broader financial markets and could result in adverse consequences to the return on, value of, and market for the Registrants' securities and other instruments whose returns are linked to any such benchmark.
Failure to comply with debt covenants or conditions could adversely affect the ability of the Registrants, SEGCO, Southern Company Gas Capital, or Nicor Gas to execute future borrowings.
The debt and credit agreements of the Registrants, SEGCO, Southern Company Gas Capital, and Nicor Gas contain various financial and other covenants. Georgia Power's loan guarantee agreement with the DOE contains additional covenants, events of default, and mandatory prepayment events relating to the construction of Plant Vogtle Units 3 and 4. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the agreements, which would negatively affect the applicable company's financial condition and liquidity.
Volatility in the securities markets, interest rates, and other factors could substantially increase defined benefit pension and other postretirement plan costs and the funding available for nuclear decommissioning.
The costs of providing pension and other postretirement benefit plans are dependent on a number of factors, such as the rates of return on plan assets, discount rates, the level of interest rates used to measure the required minimum funding levels of the plan, changes in actuarial assumptions, government regulations, and/or life expectancy, and the frequency and amount of the Southern Company system's required or voluntary contributions made to the plans. Changes in actuarial assumptions and differences between the assumptions and actual values, as well as a significant decline in the value of investments that fund the pension and other postretirement plans, if not offset or mitigated by a decline in plan liabilities, could increase pension and other postretirement expense, and the Southern Company system could be required from time to time to fund the pension plans with significant amounts of cash. Such cash funding obligations could have a material impact on liquidity by reducing cash flows and could negatively affect results of operations. See MANAGEMENT'S DISCUSSION AND ANALYSIS – ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Pension and Other Postretirement Benefits" in Item 7 herein and Note 11 to the financial statements in Item 8 herein for additional information regarding the defined benefit pension and other postretirement plans. Additionally, Alabama Power and Georgia Power each hold significant assets in their nuclear decommissioning trusts to satisfy obligations to decommission their nuclear plants. The rate of return on assets held in those trusts can significantly impact both the funding available for decommissioning and the funding requirements for the trusts. See Note 6 to the financial statements under "Nuclear Decommissioning" in Item 8 herein for additional information.
The Registrants are subject to risks associated with their ability to obtain adequate insurance at acceptable costs.
The financial condition of some insurance companies, actual or threatened physical or cyber attacks, and natural disasters, among other things, could have disruptive effects on insurance markets. The availability of insurance may decrease, and the insurance that the Registrants are able to obtain may have higher deductibles, higher premiums, and more restrictive policy terms. Further, the insurance policies may not cover all of the potential exposures or the actual amount of loss incurred.
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Any losses not covered by insurance, or any increases in the cost of applicable insurance, could adversely affect the results of operations, cash flows, or financial condition of the affected Registrant.
The use of derivative contracts by Southern Company and its subsidiaries in thenormal course of business could result in financial losses that negatively impact thenet income of the Registrants or in reported net income volatility.
Southern Company and its subsidiaries use derivative instruments, such as swaps, options, futures, and forwards, to manage their commodity and interest rate exposures and, to a lesser extent, manage foreign currency exchange rate exposure and engage in limited trading activities. The Registrants could recognize financial losses as a result of volatility in the market values of these contracts or if a counterparty fails to perform. These risks are managed through risk management policies, limits, and procedures, which might not work as planned and cannot entirely eliminate the risks associated with these activities. In addition, derivative contracts entered into for hedging purposes might not offset the underlying exposure being hedged as expected, resulting in financial losses. In the absence of actively quoted market prices and pricing information from external sources, the valuation of these financial instruments can involve management's judgment or use of estimates. The factors used in the valuation of these instruments become more difficult to predict and the calculations become less reliable further into the future. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.
In addition, Southern Company Gas utilizes derivative instruments to lock in economic value in wholesale gas services, which may not qualify as, or may not be designated as, hedges for accounting purposes. The difference in accounting treatment for the underlying position and the financial instrument used to hedge the value of the contract can cause volatility in reported net income of Southern Company and Southern Company Gas while the positions are open due to mark-to-market accounting.
See Notes 13 and 14 to the financial statements in Item 8 herein for additional information.
Future impairments of goodwill or long-lived assets could have a material adverse effect on the Registrants' results of operations.
Goodwill is assessed for impairment at least annually and more frequently if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value and long-lived assets are assessed for impairment whenever events or circumstances indicate that an asset's carrying amount may not be recoverable. In connection with the completion of the Merger, the application of the acquisition method of accounting was pushed down to Southern Company Gas. The excess of the purchase price over the fair values of Southern Company Gas' assets and liabilities was recorded as goodwill. This resulted in a significant increase in the goodwill recorded on Southern Company's and Southern Company Gas' consolidated balance sheets. At December 31, 2019, goodwill was $5.3 billion and $5.0 billion for Southern Company and Southern Company Gas, respectively.
In addition, Southern Company and its subsidiaries have long-lived assets recorded on their balance sheets. To the extent the value of goodwill or long-lived assets become impaired, the affected Registrant may be required to incur impairment charges that could have a material impact on their results of operations. For example, Southern Company Gas has two natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either of these natural gas storage facilities. See Note 3 to the financial statements under "Other Matters" in Item 8 herein for information regarding certain impairment charges at Southern Company and Southern Company Gas.
Item 1B.UNRESOLVED STAFF COMMENTS.
None.
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Item 2. PROPERTIES
Electric
Electric Properties
The traditional electric operating companies, Southern Power, and SEGCO, at December 31, 2019, owned and/or operated 30 hydroelectric generating stations, 24 fossil fuel generating stations, three nuclear generating stations, 13 combined cycle/cogeneration stations, 42 solar facilities, 10 wind facilities, one fuel cell facility, and one battery storage facility. The amounts of capacity for each company at December 31, 2019 are shown in the table below. The traditional electric operating companies have certain jointly-owned generating stations. For these facilities, the nameplate capacity shown represents the Registrant's portion of total plant capacity, with ownership percentages provided if less than 100%.
Facility/SourceGenerating Station/Ownership PercentageCounterpartyLocationMWs
Nameplate
Capacity(a)


Contract Term
NCEMCNCEMC100(KWs)

through Dec. 2021
FOSSIL STEAM
GadsdenGadsden, AL120,000
BarryMobile, AL1,300,000
Greene County (60%)Demopolis, AL300,000
Gaston Unit 5Wilsonville, AL880,000
Miller (95.92%)Birmingham, AL2,532,288
Alabama Power Total5,132,288
BowenCartersville, GA3,160,000
Scherer (8.4% of Units 1 and 2 and 75% of Unit 3)Macon, GA750,924
Wansley (53.5%)Carrollton, GA925,550
YatesNewnan, GA700,000
Georgia Power Total5,536,474
Daniel (50%)Pascagoula, MS500,000
Greene County (40%)Demopolis, AL200,000
WatsonGulfport, MS750,000
Mississippi Power Total1,450,000
Gaston Units 1-4Wilsonville, AL
SEGCO Total1,000,000
(b)
Total Fossil Steam13,118,762
NUCLEAR STEAM
FarleyDothan, AL
Alabama Power Total1,720,000
Hatch (50.1%)Baxley, GA899,612
Vogtle Units 1 and 2 (45.7%)Augusta, GA1,060,240
Georgia Power Total1,959,852
Total Nuclear Steam3,679,852
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Power Sales Agreements"
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

COMBUSTION TURBINES
Greene CountyDemopolis, AL
Alabama Power Total720,000
BoulevardSavannah, GA19,700
McDonough Unit 3Atlanta, GA78,800
McIntosh Units 1 through 8Effingham County, GA640,000
McManusBrunswick, GA481,700
RobinsWarner Robins, GA158,400
Wansley (53.5%)Carrollton, GA26,322
WilsonAugusta, GA354,100
Georgia Power Total1,759,022
SweattMeridian, MS39,400
WatsonGulfport, MS39,360
Mississippi Power Total78,760
AddisonThomaston, GA668,800
Cleveland CountyCleveland County, NC720,000
DahlbergJackson County, GA756,000
RowanSalisbury, NC455,250
Southern Power Total2,600,050
Gaston (SEGCO)
Wilsonville, AL19,680
(b)
Total Combustion Turbines5,177,512
COGENERATION
Washington CountyWashington County, AL123,428
Lowndes CountyBurkeville, AL104,800
TheodoreTheodore, AL236,418
Alabama Power Total464,646
Chevron Cogenerating StationPascagoula, MS147,292
(c)
Mississippi Power Total147,292
Total Cogeneration611,938
COMBINED CYCLE
BarryMobile, AL
Alabama Power Total1,070,424
McIntosh Units 10 and 11Effingham County, GA1,318,920
McDonough-Atkinson Units 4 through 6Atlanta, GA2,520,000
Georgia Power Total3,838,920
DanielPascagoula, MS1,070,424
RatcliffeKemper County, MS769,898
Mississippi Power Total1,840,322
FranklinSmiths, AL1,857,820
HarrisAutaugaville, AL1,318,920
MankatoMankato, MN720,000
(d)
RowanSalisbury, NC530,550
Wansley Units 6 and 7Carrollton, GA1,073,000
Southern Power Total5,500,290
Total Combined Cycle12,249,956
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

HYDROELECTRIC FACILITIES
BankheadHolt, AL53,985
BouldinWetumpka, AL225,000
HarrisWedowee, AL132,000
HenryOhatchee, AL72,900
HoltHolt, AL46,944
JordanWetumpka, AL100,000
LayClanton, AL177,000
Lewis SmithJasper, AL157,500
Logan MartinVincent, AL135,000
MartinDadeville, AL182,000
MitchellVerbena, AL170,000
ThurlowTallassee, AL81,000
WeissLeesburg, AL87,750
YatesTallassee, AL47,000
Alabama Power Total1,668,079
Bartletts FerryColumbus, GA173,000
BurtonClayton, GA6,120
Flint RiverAlbany, GA5,400
Goat RockColumbus, GA38,600
Lloyd ShoalsJackson, GA14,400
Morgan FallsAtlanta, GA16,800
NacoocheeLakemont, GA4,800
North HighlandsColumbus, GA29,600
Oliver DamColumbus, GA60,000
Rocky Mountain (25.4%)Rome, GA229,362
(e)
Sinclair DamMilledgeville, GA45,000
Tallulah FallsClayton, GA72,000
TerroraClayton, GA16,000
TugaloClayton, GA45,000
Wallace DamEatonton, GA321,300
YonahToccoa, GA22,500
Georgia Power Total1,099,882
Total Hydroelectric Facilities2,767,961
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

RENEWABLE SOURCES:
SOLAR FACILITIES
Fort RuckerCalhoun County, AL10,560
Anniston Army DepotDale County, AL7,380
Alabama Power Total17,940
Fort BenningColumbus, GA30,005
Fort GordonAugusta, GA30,000
Fort StewartFort Stewart, GA30,000
Kings BayCamden County, GA30,161
DaltonDalton, GA6,508
Marine Corps Logistics BaseAlbany, GA31,161
6 Other PlantsVarious Georgia locations11,171
Georgia Power Total169,006
AdobeKern County, CA20,000
ApexNorth Las Vegas, NV20,000
Boulder IClark County, NV100,000
ButlerTaylor County, GA104,000
Butler Solar FarmTaylor County, GA22,000
CalipatriaImperial County, CA20,000
Campo VerdeImperial County, CA147,420
CimarronSpringer, NM30,640
Decatur CountyDecatur County, GA20,000
Decatur ParkwayDecatur County, GA84,000
Desert StatelineSan Bernadino County, CA299,900
East PecosPecos County, TX120,000
GarlandKern County, CA205,290
Gaskell West IKern County, CA20,000
GranvilleOxford, NC2,500
HenriettaKings County, CA102,000
Imperial ValleyImperial County, CA163,200
LamesaDawson County, TX102,000
Lost Hills - BlackwellKern County, CA32,000
Macho SpringsLuna County, NM55,000
Morelos del SolKern County, CA15,000
North StarFresno County, CA61,600
PawpawTaylor County, GA30,480
RoserockPecos County, TX160,000
RutherfordRutherford County, NC74,800
SandhillsTaylor County, GA148,000
SpectrumClark County, NV30,240
TranquillityFresno County, CA205,300
Southern Power Total2,395,370
(f)
Total Solar2,582,316
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

WIND FACILITIES
BethelCastro County, TX276,000
Cactus FlatsConcho County, TX148,350
Grant PlainsGrant County, OK147,200
Grant WindGrant County, OK151,800
Kay WindKay County, OK299,000
PassadumkeagPenobscot County, ME42,900
Salt ForkDonley & Gray Counties TX174,000
Tyler BluffCooke County, TX125,580
Wake WindCrosby & Floyd Counties, TX257,250
Wildhorse MountainPushmataha County, OK100,000
Southern Power Total1,722,080
(g)
FUEL CELL FACILITY
Redlion and Brookside (DSGP)New Castle and Newark, DE27,500
(h)
Southern Power Total27,500
BATTERY STORAGE FACILITY
MillikenOrange County, CA2,000
(i)
Southern Power Total2,000
Total Alabama Power Generating Capacity10,793,377
Total Georgia Power Generating Capacity14,363,156
Total Mississippi Power Generating Capacity3,516,374
Total Southern Power Generating Capacity12,247,290
Total Generating Capacity41,939,877
(a)
See "Jointly-Owned Facilities" and "Titles to Property" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
(b)
Alabama Power and Georgia Power each own 50% of the outstanding common stock of SEGCO, an operating public utility company. Alabama Power and Georgia Power are each entitled to one-half of SEGCO's capacity and energy. Alabama Power acts as SEGCO's agent in the operation of SEGCO's units and furnishes fuel to SEGCO for its units. See Note 7 to the financial statements under "SEGCO" in Item 8 herein for additional information.
(c)
Generation is dedicated to a single industrial customer. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" in Item 7 herein.
(d)
On January 17, 2020, Southern Power completed the sale of its equity interest in Plant Mankato to a subsidiary of Xcel. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" in Item 8 herein for additional information.
(e)Operated by OPC.
(f)Southern Power owns a 67% equity interest in SP Solar (a limited partnership indirectly owning all of Southern Power's solar facilities, except the Roserock and Gaskell West facilities). SP Solar is the 51% majority owner of Boulder 1, Garland, Henrietta, Imperial Valley, Lost Hills Blackwell, North Star, and Tranquillity; the 66% majority owner of Desert Stateline; and the sole owner of the remaining SP Solar facilities. Southern Power is the 51% majority owner of Roserock and also the controlling partner in a tax equity partnership owning Gaskell West. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for the respective facility.
(g)Southern Power is the controlling member in SP Wind (a tax equity entity owning all of Southern Power's wind facilities, except Cactus Flats and Wildhorse Mountain). SP Wind is the 90.1% majority owner of Wake Wind and owns 100% of the remaining SP Wind facilities. Southern Power is the controlling partner in tax equity partnerships owning Cactus Flats and Wildhorse Mountain. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for the respective facility.
(h)Southern Power has two noncontrolling interest partners that own approximately 10 MWs of the facility.
(i)Southern Power has an equity method investment in the facility as the Class B member.
Except as discussed below under "Titles to Property," the principal plants and "Acquisitions"other important units of the traditional electric operating companies, Southern Power, and SEGCO are owned in fee by the respective companies. It is the opinion of management of each such company that its operating properties are adequately maintained and are substantially in good operating condition, and suitable for their intended purpose.
Mississippi Power owns a 79-mile length of 500-kilovolt transmission line which is leased to Entergy Gulf States Louisiana, LLC. The line extends from Plant Daniel to the Louisiana state line. Entergy Gulf States Louisiana, LLC is paying a use fee through 2024 covering all expenses and the amortization of the original cost. At December 31, 2019, the unamortized portion was approximately $10 million.
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Mississippi Power owns a lignite mine and equipment that were intended to provide fuel for the Kemper IGCC. Mississippi Power also has mineral reserves located around the Kemper County energy facility. Liberty Fuels Company, LLC, the operator of the mine, has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy FacilityLignite Mine and CO2 Pipeline Facilities" in Item 78 herein for additional information.
In December 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, which identified alternatives that, if implemented, could impact Mississippi Power's generating stations, including Plant Greene County, which is jointly owned with Alabama Power. See BUSINESS in Item 1 herein under "Rate MattersIntegrated Resource PlanningMississippi Power" and Note 2 to the financial statements under "Mississippi PowerReserve Margin Plan" in Item 8 herein for additional information.
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for information regarding the sale of Gulf Power.
In 2019, the maximum demand on the traditional electric operating companies, Southern Power Company, and SEGCO was 34,209,000 KWs and occurred on August 13, 2019. The all-time maximum demand of 38,777,000 KWs on the traditional electric operating companies (including Gulf Power), Southern Power Company, and SEGCO occurred on August 22, 2007. These amounts exclude demand served by capacity retained by MEAG Power, OPC, and SEPA. The reserve margin for the traditional electric operating companies, Southern Power Company, and SEGCO in 2019 was 28.1%. See SELECTED FINANCIAL DATA in Item 6 herein for additional information.
Jointly-Owned Facilities
Alabama Power, Georgia Power, and Mississippi Power at December 31, 2019 had undivided interests in certain generating plants and other related facilities with non-affiliated parties. The percentages of ownership of the total plant or facility are as follows:
    Percentage Ownership  
  
Total
Capacity
 
Alabama
Power
 
Power
South
 
Georgia
Power
 
Mississippi
Power
 OPC 
MEAG
Power
 Dalton 
Gulf
Power
  (MWs)                
Plant Miller Units 1 and 2 1,320
 91.8% 8.2% % % % % % %
Plant Hatch 1,796
 
 
 50.1
 
 30.0
 17.7
 2.2
 
Plant Vogtle Units 1 and 2 2,320
 
 
 45.7
 
 30.0
 22.7
 1.6
 
Plant Scherer Units 1 and 2 1,636
 
 
 8.4
 
 60.0
 30.2
 1.4
 
Plant Scherer Unit 3 818
 
 
 75.0
 
 
 
 
 25.0
Plant Wansley 1,779
 
 
 53.5
 
 30.0
 15.1
 1.4
 
Rocky Mountain 903
 
 
 25.4
 
 74.6
 
 
 
Plant Daniel Units 1 and 2 1,000
 
 
 
 50.0
 
 
 
 50.0
Alabama Power, Georgia Power, and Mississippi Power have contracted to operate and maintain the respective units in which each has an interest (other than Rocky Mountain) as agent for the joint owners. Southern Nuclear operates and provides services to Alabama Power's and Georgia Power's nuclear plants.
In addition, Georgia Power has commitments, in the form of capacity purchases, regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity
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are required whether or not any capacity is available. Portions of the capacity payments made to MEAG Power for its Plant Vogtle Units 1 and 2 investment relate to costs in excess of Georgia Power's allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity is included in purchased power from non-affiliates in Georgia Power's statements of income in Item 8 herein. Also see Note 3 to the financial statements under "Commitments" in Item 8 herein for additional information.
Construction continues on Plant Vogtle Units 3 and 4, which are jointly owned by the Vogtle Owners (with each owner holding the same undivided ownership interest as shown in the table above with respect to Plant Vogtle Units 1 and 2). See Note 2 to the financial statements under "Georgia PowerNuclear Construction" in Item 8 herein.
Titles to Property
The traditional electric operating companies', Southern Power's, and SEGCO's interests in the principal plants and other important units of the respective companies are owned in fee by such companies, subject to the following major encumbrances: (1) liens pursuant to the assumption of debt obligations by Mississippi Power in connection with the acquisition of Plant Daniel Units 3 and 4, (2) a leasehold interest granted by Mississippi Power's largest retail customer, Chevron Products Company (Chevron), at the Chevron refinery, on which five combustion turbines of Mississippi Power are located, (3) liens pursuant to agreements with Chevron on Mississippi Power's co-generation assets located at the Chevron refinery, and (4) liens associated with Georgia Power's reimbursement obligations to the DOE under its loan guarantee, which are secured by a first priority lien on (a) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 and (b) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. See Note 5 to the financial statements under "Assets Subject to Lien" and Note 8 to the financial statements under "Secured Debt" and "Long-term DebtDOE Loan Guarantee Borrowings" in Item 8 herein for additional information. The traditional electric operating companies own the fee interests in certain of their principal plants as tenants in common. See "Jointly-Owned Facilities" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information. Properties such as electric transmission and distribution lines, steam heating mains, and gas pipelines are constructed principally on rights-of-way, which are maintained under franchise or are held by easement only. A substantial portion of lands submerged by reservoirs is held under flood right easements. In addition, certain of the renewable generating facilities occupy or use real property that is not owned, primarily through various leases, easements, rights-of-way, permits, or licenses from private landowners or governmental entities.
Natural Gas
Southern Company Gas considers its properties to be adequately maintained, substantially in good operating condition, and suitable for their intended purpose. The following provides the location and general character of the materially important properties that are used by the segments of Southern PowerCompany Gas. Substantially all of Nicor Gas' properties are subject to the lien of the indenture securing its first mortgage bonds. See Note 8 to the financial statements in Item 8 herein for additional information.
ForDistribution and Transmission Mains
Southern Company Gas' distribution systems transport natural gas from its pipeline suppliers to customers in its service areas. These systems consist primarily of distribution and transmission mains, compressor stations, peak shaving/storage plants, service lines, meters, and regulators. At December 31, 2019, Southern Company Gas' gas distribution operations segment owned approximately 75,585 miles of underground distribution and transmission mains, which are located on easements or rights-of-way that generally provide for perpetual use.
Storage Assets
Gas Distribution Operations
Southern Company Gas owns and operates eight underground natural gas storage fields in Illinois with a total working capacity of approximately 150 Bcf, approximately 135 Bcf of which is usually cycled on an annual basis. This system is designed to meet about 50% of the estimated peak-day deliveries and approximately 40% of the normal winter deliveries in Illinois. This level of storage capability provides Nicor Gas with supply flexibility, improves the reliability of deliveries, and helps mitigate the risk associated with seasonal price movements.
Southern Company Gas also has four LNG plants located in Georgia and Tennessee with total LNG storage capacity of approximately 7.0 Bcf. In addition, Southern Company Gas owns two propane storage facilities in Virginia, each with storage capacity of approximately 0.3 Bcf. The LNG plants and propane storage facility are used by Southern Company Gas' gas distribution operations segment to supplement natural gas supply during peak usage periods.
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All Other
Southern Company Gas subsidiaries own three high-deliverability natural gas storage and hub facilities that are included in the all other segment. Jefferson Island Storage & Hub, LLC operates a storage facility in Louisiana consisting of two salt dome gas storage caverns. See Note 3 to the financial statements under "Other MattersSouthern Company GasNatural Gas Storage Facilities" in Item 8 herein for additional information on a related impairment charge recorded in 2019. Golden Triangle Storage, Inc. operates a storage facility in Texas consisting of two salt dome caverns. Central Valley Gas Storage, LLC operates a depleted field storage facility in California. In addition, Southern Company Gas has a LNG facility in Alabama that produces LNG for Pivotal LNG to support its business of selling LNG as a substitute fuel in various markets. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, in Item 8 herein for additional information.
Jointly-Owned Properties
Southern Company Gas' gas pipeline investments segment has a 50% undivided ownership interest in a 115-mile pipeline facility in northwest Georgia that was placed in service in 2017. Southern Company Gas also has an agreement to lease its 50% undivided ownership in the pipeline facility. See Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
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Item 3.LEGAL PROCEEDINGS
See Note 3 to the financial statements in Item 8 herein for descriptions of legal and administrative proceedings discussed therein.
Item 4.MINE SAFETY DISCLOSURES
Not applicable.
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INFORMATION ABOUT OUR EXECUTIVE OFFICERS – SOUTHERN COMPANY
(Identification of executive officers of Southern Company is inserted in Part I in accordance with Regulation S-K, Item 401) The ages of the officers set forth below are as of December 31, 2019.
Thomas A. Fanning
Chairman, President, and Chief Executive Officer
Age 62
First elected in 2003. Chairman and Chief Executive Officer since December 2010 and President since August 2010.
Andrew W. Evans
Executive Vice President and Chief Financial Officer
Age 53
First elected in 2016. Executive Vice President since July 2016 and Chief Financial Officer since June 2018. Previously served as Chief Executive Officer and Chairman of Southern Company Gas' Board of Directors from January 2016 through June 2018, President of Southern Company Gas from May 2015 through June 2018, Chief Operating Officer of Southern Company Gas from May 2015 through December 2015, and Executive Vice President and Chief Financial Officer of Southern Company Gas from May 2006 through May 2015.
W. Paul Bowers
Chairman, President and Chief Executive Officer of Georgia Power
Age 63
First elected in 2001. Chief Executive Officer, President, and Director of Georgia Power since January 2011. Chairman of Georgia Power's Board of Directors since May 2014.
Stanley W. Connally, Jr.
Executive Vice President of SCS
Age 50
First elected in 2012. Executive Vice President for Operations of SCS since June 2018. Previously served as President, Chief Executive Officer, and Director of Gulf Power from July 2012 through December 2018 and Chairman of Gulf Power's Board of Directors from July 2015 through December 2018.
Mark A. Crosswhite
Chairman, President and Chief Executive Officer of Alabama Power
Age 57
First elected in 2011. President, Chief Executive Officer, and Director of Alabama Power since March 2014. Chairman of Alabama Power's Board of Directors since May 2014.
Kimberly S. Greene
Chairman, President, and Chief Executive Officer of Southern Company Gas
Age 53
First elected in 2013. Chairman, President, and Chief Executive Officer of Southern Company Gas since June 2018. Director of Southern Company Gas since July 2016. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from March 2014 through June 2018.
James Y. Kerr II
Executive Vice President, Chief Legal Officer, and Chief Compliance Officer
Age 55
First elected in 2014. Executive Vice President, Chief Legal Officer (formerly known as General Counsel), and Chief Compliance Officer since March 2014.
Stephen E. Kuczynski
Chairman, President, and Chief Executive Officer of Southern Nuclear
Age 57
First elected in 2011. Chairman, President, and Chief Executive Officer of Southern Nuclear since July 2011.
Mark S. Lantrip
Executive Vice President
Age 65
First elected in 2014. Executive Vice President since February 2019. Chairman, President, and Chief Executive Officer of SCS since March 2014 and Chairman and Chief Executive Officer of Southern Power since March 2018. Previously served as President of Southern Power from March 2018 to May 2019.
Table of ContentsIndex to Financial Statements

Anthony L. Wilson
Chairman, President, and Chief Executive Officer of Mississippi Power
Age 55
First elected in 2015. President of Mississippi Power since October 2015 and Chief Executive Officer and Director since January 2016. Chairman of Mississippi Power's Board of Directors since August 2016. Previously served as Executive Vice President of Mississippi Power from May 2015 to October 2015 and Executive Vice President of Georgia Power from January 2012 to May 2015.
Christopher C. Womack
Executive Vice President
Age 61
First elected in 2008. Executive Vice President and President of External Affairs since January 2009.
The officers of Southern Company were elected at the first meeting of the directors following the last annual meeting of stockholders held on May 22, 2019, for a term of one year or until their successors are elected and have qualified.
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INFORMATION ABOUT OUR EXECUTIVE OFFICERS – ALABAMA POWER
(Identification of executive officers of Alabama Power is inserted in Part I in accordance with Regulation S-K, Item 401.) The ages of the officers set forth below are as of December 31, 2019.
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
Age 57
First elected in 2014. President, Chief Executive Officer, and Director since March 1, 2014. Chairman since May 2014.
Greg J. Barker
Executive Vice President
Age 56
First elected in 2016. Executive Vice President for Customer Services since February 2016. Previously served as Senior Vice President of Marketing and Economic Development from April 2012 to February 2016.
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
Age 60
First elected in 2010. Executive Vice President, Chief Financial Officer, and Treasurer since August 2010.
Zeke W. Smith
Executive Vice President
Age 60
First elected in 2010. Executive Vice President of External Affairs since November 2010.
James P. Heilbron
Senior Vice President and Senior Production Officer
Age 48
First elected in 2013. Senior Vice President and Senior Production Officer of Alabama Power since March 2013 and Senior Vice President and Senior Production Officer – West of SCS and Senior Production Officer of Mississippi Power since October 2018.
R. Scott Moore
Senior Vice President
Age 52
First elected in 2017. Senior Vice President of Power Delivery since May 2017. Previously served as Vice President of Transmission from August 2012 to May 2017.
The officers of Alabama Power were elected at the meeting of the directors held on April 26, 2019 for a term of one year or until their successors are elected and have qualified.
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PART II

Item 5.MARKET FOR REGISTRANTS' COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
(a)(1) The common stock of Southern Company is listed and traded on the NYSE under the ticker symbol SO. The common stock is also traded on regional exchanges across the U.S.
There is no market for the other Registrants' common stock, all of which is owned by Southern Company.
(a)(2) Number of Southern Company's common stockholders of record at January 31, 2020: 110,780
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.46 in 2019 and $2.38 in 2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. Dividends on Southern Company's common stock are payable at the discretion of Southern Company's Board of Directors and depend upon earnings, financial condition, and other factors. See Note 8 to the financial statements under "Dividend Restrictions" in Item 8 herein for additional information.
Each of the other Registrants have one common stockholder, Southern Company.
(a)(3) Securities authorized for issuance under equity compensation plans.
See Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
(b) Use of Proceeds
Not applicable.
(c) Issuer Purchases of Equity Securities
None.
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Item 6.SELECTED FINANCIAL DATA
Page
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(d)
 2018 2017 
2016(e)
 2015
Operating Revenues (in millions)$21,419
 $23,495
 $23,031
 $19,896
 $17,489
Total Assets (in millions)$118,700
 $116,914
 $111,005
 $109,697
 $78,318
Gross Property Additions (in millions)$7,814
 $8,205
 $5,984
 $7,624
 $6,169
Return on Average Common Equity (percent)(a)
18.15
 9.11
 3.44
 10.80
 11.68
Cash Dividends Paid Per Share of
 Common Stock
$2.4600
 $2.3800
 $2.3000
 $2.2225
 $2.1525
Consolidated Net Income Attributable to
   Southern Company (in millions)(a)
$4,739
 $2,226
 $842
 $2,448
 $2,367
Earnings Per Share —         
Basic$4.53
 $2.18
 $0.84
 $2.57
 $2.60
Diluted4.50
 2.17
 0.84
 2.55
 2.59
Capitalization (in millions):         
Common stockholders' equity$27,505
 $24,723
 $24,167
 $24,758
 $20,592
Preferred and preference stock of subsidiaries and
   noncontrolling interests(b)
4,254
 4,316
 1,361
 1,854
 1,390
Redeemable preferred stock of subsidiaries291
 291
 324
 118
 118
Redeemable noncontrolling interests
 
 
 164
 43
Long-term debt(c)
41,798
 40,736
 44,462
 42,629
 24,688
Total (excluding amounts due within one year)(c)
$73,848
 $70,066
 $70,314
 $69,523
 $46,831
Capitalization Ratios (percent):         
Common stockholders' equity37.2
 35.3
 34.4
 35.6
 44.0
Preferred and preference stock of subsidiaries and
   noncontrolling interests(b)
5.8
 6.2
 1.9
 2.7
 3.0
Redeemable preferred stock of subsidiaries0.4
 0.4
 0.5
 0.2
 0.3
Redeemable noncontrolling interests
 
 
 0.2
 0.1
Long-term debt(c)
56.6
 58.1
 63.2
 61.3
 52.6
Total (excluding amounts due within one year)(c)
100.0
 100.0
 100.0
 100.0
 100.0
Other Common Stock Data:         
Book value per share$26.11
 $23.91
 $23.99
 $25.00
 $22.59
Market price per share:         
High$64.26
 $49.43
 $53.51
 $54.64
 $53.16
Low43.26
 42.38
 46.71
 46.00
 41.40
Close (year-end)63.70
 43.92
 48.09
 49.19
 46.79
Market-to-book ratio (year-end) (percent)243.9
 183.7
 200.5
 196.8
 207.2
Price-earnings ratio (year-end) (times)14.1
 20.1
 57.3
 19.1
 18.0
Dividends paid (in millions)$2,570
 $2,425
 $2,300
 $2,104
 $1,959
Dividend yield (year-end) (percent)3.9
 5.4
 4.8
 4.5
 4.6
Dividend payout ratio (percent)54.2
 108.9
 273.2
 86.0
 82.7
Shares outstanding (in thousands):         
Average1,046,023
 1,020,247
 1,000,336
 951,332
 910,024
Year-end1,053,251
 1,033,788
 1,007,603
 990,394
 911,721
Stockholders of record (year-end)111,252
 116,135
 120,803
 126,338
 131,771
(a)Southern Company recorded a $2.6 billion pre-tax ($1.4 billion after tax) gain associated with the sale of Gulf Power in 2019. Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. In addition, pre-tax charges of $3.4 billion ($2.4 billion after tax) were recorded by Mississippi Power related to the suspension of the Kemper IGCC in 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC. See Notes 2 and 15 to the financial statements in Item 8 herein for additional information.
(b)See Note 15 to the financial statements under "Southern Power – Sales of Renewable Facility Interests" in Item 8 herein for additional information on 2018 changes in noncontrolling interests.
(c)
Amounts related to Gulf Power were reclassified to liabilities held for sale at December 31, 2018. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(d)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(e)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(a)
 2018 2017 
2016(b)
 2015
Operating Revenues (in millions):         
Residential$6,012
 $6,608
 $6,515
 $6,614
 $6,383
Commercial4,936
 5,266
 5,439
 5,394
 5,317
Industrial3,021
 3,224
 3,262
 3,171
 3,172
Other115
 124
 114
 55
 115
Total retail14,084
 15,222
 15,330
 15,234
 14,987
Wholesale2,152
 2,516
 2,426
 1,926
 1,798
Total revenues from sales of electricity16,236
 17,738
 17,756
 17,160
 16,785
Natural gas revenues3,792
 3,854
 3,791
 1,596
 
Other revenues1,391
 1,903
 1,484
 1,140
 704
Total$21,419
 $23,495
 $23,031
 $19,896
 $17,489
Kilowatt-Hour Sales (in millions):         
Residential48,528
 54,590
 50,536
 53,337
 52,121
Commercial49,101
 53,451
 52,340
 53,733
 53,525
Industrial50,106
 53,341
 52,785
 52,792
 53,941
Other726
 799
 846
 883
 897
Total retail148,461
 162,181
 156,507
 160,745
 160,484
Wholesale sales48,027
 49,963
 49,034
 37,043
 30,505
Total196,488
 212,144
 205,541
 197,788
 190,989
Average Revenue Per Kilowatt-Hour (cents):         
Residential12.39
 12.10
 12.89
 12.40
 12.25
Commercial10.05
 9.85
 10.39
 10.04
 9.93
Industrial6.03
 6.04
 6.18
 6.01
 5.88
Total retail9.49
 9.39
 9.80
 9.48
 9.34
Wholesale4.48
 5.04
 4.95
 5.20
 5.89
Total sales8.26
 8.36
 8.64
 8.68
 8.79
Average Annual Kilowatt-Hour         
Use Per Residential Customer12,135
 12,514
 11,618
 12,387
 13,318
Average Annual Revenue         
Per Residential Customer$1,503
 $1,555
 $1,498
 $1,541
 $1,630
Plant Nameplate Capacity         
Ratings (year-end) (megawatts)41,940
 45,824
 46,936
 46,291
 44,223
Maximum Peak-Hour Demand (megawatts):         
Winter30,022
 36,429
 31,956
 32,272
 36,794
Summer34,209
 34,841
 34,874
 35,781
 36,195
System Reserve Margin (at peak) (percent)28.1
 29.8
 30.8
 34.2
 33.2
Annual Load Factor (percent)60.3
 61.2
 61.4
 61.5
 59.9
Plant Availability (percent):         
Fossil-steam83.8
 81.4
 84.5
 86.4
 86.1
Nuclear92.5
 94.0
 94.7
 93.3
 93.5
(a)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(b)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(a)
 2018 2017 
2016(b)
 2015
Source of Energy Supply (percent):         
Gas47.0
 43.0
 42.6
 41.9
 42.8
Coal20.3
 25.7
 26.5
 30.2
 32.2
Nuclear14.7
 13.8
 14.5
 14.6
 15.3
Hydro3.2
 2.9
 2.1
 2.1
 2.6
Other5.9
 5.4
 5.3
 2.3
 0.8
Purchased power8.9
 9.2
 9.0
 8.9
 6.3
Total100.0
 100.0
 100.0
 100.0
 100.0
Gas Sales Volumes (mmBtu in millions):         
Firm737
 791
 729
 296
 
Interruptible106
 109
 109
 53
 
Total843
 900
 838
 349
 
Traditional Electric Operating Company
   Customers (year-end) (in thousands):
         
Residential3,688
 4,053
 4,011
 3,970
 3,928
Commercial549
 603
 599
 595
 590
Industrial17
 17
 18
 17
 17
Other12
 12
 12
 11
 11
Total electric customers4,266
 4,685
 4,640
 4,593
 4,546
Gas distribution operations customers4,277
 4,248
 4,623
 4,586
 
Total utility customers8,543
 8,933
 9,263
 9,179
 4,546
Employees (year-end)27,943
 30,286
 31,344
 32,015
 26,703
(a)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(b)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
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SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Alabama Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$6,125
 $6,032
 $6,039
 $5,889
 $5,768
Net Income After Dividends
on Preferred and Preference Stock (in millions)
$1,070
 $930
 $848
 $822
 $785
Cash Dividends on Common Stock (in millions)$844
 $801
 $714
 $765
 $571
Return on Average Common Equity (percent)13.03
 13.00
 12.89
 13.34
 13.37
Total Assets (in millions)$29,152
 $26,730
 $23,864
 $22,516
 $21,721
Gross Property Additions (in millions)$1,862
 $2,273
 $1,949
 $1,338
 $1,492
Capitalization (in millions):         
Common stockholder's equity$8,955
 $7,477
 $6,829
 $6,323
 $5,992
Preference stock
 
 
 196
 196
Redeemable preferred stock291
 291
 291
 85
 85
Long-term debt8,270
 7,923
 7,628
 6,535
 6,654
Total (excluding amounts due within one year)$17,516
 $15,691
 $14,748
 $13,139
 $12,927
Capitalization Ratios (percent):         
Common stockholder's equity51.1
 47.7
 46.3
 48.1
 46.4
Preference stock
 
 
 1.5
 1.5
Redeemable preferred stock1.7
 1.9
 2.0
 0.7
 0.7
Long-term debt47.2
 50.4
 51.7
 49.7
 51.4
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential1,280,955
 1,273,526
 1,268,271
 1,262,752
 1,253,875
Commercial200,349
 200,032
 199,840
 199,146
 197,920
Industrial6,173
 6,158
 6,171
 6,090
 6,056
Other758
 760
 766
 762
 757
Total1,488,235
 1,480,476
 1,475,048
 1,468,750
 1,458,608
Employees (year-end)6,324
 6,650
 6,613
 6,805
 6,986


























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SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Alabama Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):
         
Residential$2,449
 $2,335
 $2,302
 $2,322
 $2,207
Commercial1,635
 1,578
 1,649
 1,627
 1,564
Industrial1,393
 1,428
 1,477
 1,416
 1,436
Other24
 26
 30
 (43) 27
Total retail5,501
 5,367
 5,458
 5,322
 5,234
Wholesale — non-affiliates258
 279
 276
 283
 241
Wholesale — affiliates81
 119
 97
 69
 84
Total revenues from sales of electricity5,840
 5,765
 5,831
 5,674
 5,559
Other revenues285
 267
 208
 215
 209
Total$6,125
 $6,032
 $6,039
 $5,889
 $5,768
Kilowatt-Hour Sales (in millions):
         
Residential18,264
 18,626
 17,219
 18,343
 18,082
Commercial13,567
 13,868
 13,606
 14,091
 14,102
Industrial22,148
 23,006
 22,687
 22,310
 23,380
Other173
 187
 198
 208
 201
Total retail54,152
 55,687
 53,710
 54,952
 55,765
Wholesale — non-affiliates5,057
 5,018
 5,415
 5,744
 3,567
Wholesale — affiliates3,530
 4,565
 4,166
 3,177
 4,515
Total62,739
 65,270
 63,291
 63,873
 63,847
Average Revenue Per Kilowatt-Hour (cents):
         
Residential13.41
 12.54
 13.37
 12.66
 12.21
Commercial12.05
 11.38
 12.12
 11.55
 11.09
Industrial6.29
 6.21
 6.51
 6.35
 6.14
Total retail10.16
 9.64
 10.16
 9.68
 9.39
Wholesale3.95
 4.15
 3.89
 3.95
 4.02
Total sales9.31
 8.83
 9.21
 8.88
 8.71
Residential Average Annual
Kilowatt-Hour Use Per Customer
14,290
 14,660
 13,601
 14,568
 14,454
Residential Average Annual
Revenue Per Customer
$1,916
 $1,878
 $1,819
 $1,844
 $1,764
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
10,793
 11,815
 11,797
 11,797
 11,797
Maximum Peak-Hour Demand (megawatts):
         
Winter10,104
 11,744
 10,513
 10,282
 12,162
Summer11,211
 10,652
 10,711
 10,932
 11,292
Annual Load Factor (percent)
60.8
 60.1
 63.5
 63.5
 58.4
Plant Availability (percent):
         
Fossil-steam85.9
 81.6
 82.8
 83.0
 81.5
Nuclear91.0
 91.6
 97.6
 88.0
 92.1
Source of Energy Supply (percent):
         
Coal38.7
 43.8
 44.8
 47.1
 49.1
Nuclear21.3
 20.5
 22.2
 20.3
 21.3
Gas18.5
 17.2
 18.1
 17.1
 14.6
Hydro7.3
 6.7
 5.4
 4.8
 5.6
Purchased power —         
From non-affiliates6.0
 5.4
 4.6
 4.8
 4.4
From affiliates8.2
 6.4
 4.9
 5.9
 5.0
Total100.0
 100.0
 100.0
 100.0
 100.0

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SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Georgia Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$8,408
 $8,420
 $8,310
 $8,383
 $8,326
Net Income After Dividends
on Preferred and Preference Stock (in millions)
(*)
$1,720
 $793
 $1,414
 $1,330
 $1,260
Cash Dividends on Common Stock (in millions)$1,576
 $1,396
 $1,281
 $1,305
 $1,034
Return on Average Common Equity (percent)(*)
11.71
 6.04
 12.15
 12.05
 11.92
Total Assets (in millions)$44,541
 $40,365
 $36,779
 $34,835
 $32,865
Gross Property Additions (in millions)$3,659
 $3,176
 $1,080
 $2,314
 $2,332
Capitalization (in millions):
        
Common stockholder's equity$15,065
 $14,323
 $11,931
 $11,356
 $10,719
Preferred and preference stock
 
 
 266
 266
Long-term debt10,791
 9,364
 11,073
 10,225
 9,616
Total (excluding amounts due within one year)$25,856
 $23,687
 $23,004
 $21,847
 $20,601
Capitalization Ratios (percent):
        
Common stockholder's equity58.3
 60.5
 51.9
 52.0
 52.0
Preferred and preference stock
 
 
 1.2
 1.3
Long-term debt41.7
 39.5
 48.1
 46.8
 46.7
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential2,253,188
 2,220,240
 2,185,782
 2,155,945
 2,127,658
Commercial315,328
 312,474
 308,939
 305,488
 302,891
Industrial10,622
 10,571
 10,644
 10,537
 10,429
Other9,819
 9,838
 9,766
 9,585
 9,261
Total2,588,957
 2,553,123
 2,515,131
 2,481,555
 2,450,239
Employees (year-end)6,938
 6,967
 6,986
 7,527
 7,989
(*)Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4.

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Georgia Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Residential$3,287
 $3,301
 $3,236
 $3,318
 $3,240
Commercial3,014
 3,023
 3,092
 3,077
 3,094
Industrial1,326
 1,344
 1,321
 1,291
 1,305
Other80
 84
 89
 86
 88
Total retail7,707
 7,752
 7,738
 7,772
 7,727
Wholesale — non-affiliates129
 163
 163
 175
 215
Wholesale — affiliates11
 24
 26
 42
 20
Total revenues from sales of electricity7,847
 7,939
 7,927
 7,989
 7,962
Other revenues561
 481
 383
 394
 364
Total$8,408
 $8,420
 $8,310
 $8,383
 $8,326
Kilowatt-Hour Sales (in millions):         
Residential28,201
 28,331
 26,144
 27,585
 26,649
Commercial32,818
 32,958
 32,155
 32,932
 32,719
Industrial23,163
 23,655
 23,518
 23,746
 23,805
Other518
 549
 584
 610
 632
Total retail84,700
 85,493
 82,401
 84,873
 83,805
Wholesale — non-affiliates2,646
 3,140
 3,277
 3,415
 3,501
Wholesale — affiliates335
 526
 800
 1,398
 552
Total87,681
 89,159
 86,478
 89,686
 87,858
Average Revenue Per Kilowatt-Hour (cents):         
Residential11.66
 11.65
 12.38
 12.03
 12.16
Commercial9.18
 9.17
 9.62
 9.34
 9.46
Industrial5.72
 5.68
 5.62
 5.44
 5.48
Total retail9.10
 9.07
 9.39
 9.16
 9.22
Wholesale4.70
 5.10
 4.64
 4.51
 5.80
Total sales8.95
 8.90
 9.17
 8.91
 9.06
Residential Average Annual
Kilowatt-Hour Use Per Customer
12,600
 12,849
 12,028
 12,864
 12,582
Residential Average Annual
Revenue Per Customer
$1,469
 $1,555
 $1,489
 $1,557
 $1,529
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
14,363
 15,308
 15,274
 15,274
 15,455
Maximum Peak-Hour Demand (megawatts):         
Winter14,394
 15,372
 13,894
 14,527
 15,735
Summer16,572
 15,748
 16,002
 16,244
 16,104
Annual Load Factor (percent)60.8
 64.5
 61.1
 61.9
 61.9
Plant Availability (percent):         
Fossil-steam81.0
 81.5
 85.0
 87.4
 85.6
Nuclear93.1
 95.0
 93.5
 95.6
 94.1
Source of Energy Supply (percent):         
Gas32.3
 29.1
 28.6
 28.2
 28.3
Nuclear17.4
 17.6
 17.8
 17.6
 17.6
Coal16.4
 21.1
 22.4
 26.4
 24.5
Hydro1.8
 1.9
 1.0
 1.1
 1.6
Other0.3
 0.3
 0.3
 
 
Purchased power —         
From non-affiliates11.3
 7.3
 7.8
 6.7
 5.0
From affiliates20.5
 22.7
 22.1
 20.0
 23.0
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Mississippi Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$1,264
 $1,265
 $1,187
 $1,163
 $1,138
Net Income (Loss) After Dividends
on Preferred Stock (in millions)
(a)(b)
$139
 $235
 $(2,590) $(50) $(8)
Return on Average Common Equity (percent)(a)(b)
8.54
 15.83
 (120.43) (1.87) (0.34)
Total Assets (in millions)$5,035
 $4,886
 $4,866
 $8,235
 $7,840
Gross Property Additions (in millions)$197
 $206
 $536
 $946
 $972
Capitalization (in millions):         
Common stockholder's equity$1,652
 $1,609
 $1,358
 $2,943
 $2,359
Redeemable preferred stock
 
 33
 33
 33
Long-term debt1,308
 1,539
 1,097
 2,424
 1,886
Total (excluding amounts due within one year)$2,960
 $3,148
 $2,488
 $5,400
 $4,278
Capitalization Ratios (percent):         
Common stockholder's equity55.8
 51.1
 54.6
 54.5
 55.1
Redeemable preferred stock
 
 1.3
 0.6
 0.8
Long-term debt44.2
 48.9
 44.1
 44.9
 44.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential154,205
 153,423
 153,115
 153,172
 153,158
Commercial33,552
 33,968
 33,992
 33,783
 33,663
Industrial444
 445
 452
 451
 467
Other189
 188
 173
 175
 175
Total188,390
 188,024
 187,732
 187,581
 187,463
Employees (year-end)1,030
 1,053
 1,242
 1,484
 1,478
(a)As a result of the Tax Reform Legislation, Mississippi Power recorded an income tax expense (benefit) of $(35) million and $372 million in 2018 and 2017, respectively.
(b)Pre-tax charges of $3.4 billion ($2.4 billion after tax) were recorded by Mississippi Power related to the suspension of the Kemper IGCC in 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC.

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Mississippi Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Residential$276
 $273
 $257
 $260
 $238
Commercial287
 286
 285
 279
 256
Industrial302
 321
 321
 313
 287
Other12
 9
 (9) 7
 (5)
Total retail877
 889
 854
 859
 776
Wholesale — non-affiliates237
 263
 259
 261
 270
Wholesale — affiliates132
 91
 56
 26
 76
Total revenues from sales of electricity1,246
 1,243
 1,169
 1,146
 1,122
Other revenues18
 22
 18
 17
 16
Total$1,264
 $1,265
 $1,187
 $1,163
 $1,138
Kilowatt-Hour Sales (in millions):         
Residential2,062
 2,113
 1,944
 2,051
 2,025
Commercial2,715
 2,797
 2,764
 2,842
 2,806
Industrial4,795
 4,924
 4,841
 4,906
 4,958
Other36
 37
 39
 39
 40
Total retail9,608
 9,871
 9,588
 9,838
 9,829
Wholesale — non-affiliates3,967
 3,980
 3,672
 3,920
 3,852
Wholesale — affiliates4,758
 2,584
 2,024
 1,108
 2,807
Total18,333
 16,435
 15,284
 14,866
 16,488
Average Revenue Per Kilowatt-Hour (cents):         
Residential13.39
 12.92
 13.22
 12.68
 11.75
Commercial10.57
 10.23
 10.31
 9.82
 9.12
Industrial6.30
 6.52
 6.63
 6.38
 5.79
Total retail9.13
 9.01
 8.91
 8.73
 7.90
Wholesale4.23
 5.39
 5.53
 5.71
 5.20
Total sales6.80
 7.56
 7.65
 7.71
 6.80
Residential Average Annual
Kilowatt-Hour Use Per Customer
13,391
 13,768
 12,692
 13,383
 13,242
Residential Average Annual
Revenue Per Customer
$1,795
 $1,780
 $1,680
 $1,697
 $1,556
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
3,516
 3,516
 3,628
 3,481
 3,561
Maximum Peak-Hour Demand (megawatts):         
Winter2,129
 2,763
 2,390
 2,195
 2,548
Summer2,310
 2,346
 2,322
 2,384
 2,403
Annual Load Factor (percent)64.6
 55.8
 63.1
 64.0
 60.6
Plant Availability Fossil-Steam (percent)89.1
 82.4
 89.1
 91.4
 90.6
Source of Energy Supply (percent):         
Gas91.7
 87.4
 90.4
 86.4
 82.3
Coal5.5
 6.9
 7.6
 8.1
 16.6
Purchased power —         
From non-affiliates2.1
 3.3
 (2.1) (2.0) (0.4)
From affiliates0.7
 2.4
 4.1
 7.5
 1.5
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Wholesale — non-affiliates$1,528
 $1,757
 $1,671
 $1,146
 $964
Wholesale — affiliates398
 435
 392
 419
 417
Total revenues from sales of electricity1,926
 2,192
 2,063
 1,565
 1,381
Other revenues12
 13
 12
 12
 9
Total$1,938
 $2,205
 $2,075
 $1,577
 $1,390
Net Income Attributable to
   Southern Power (in millions)(a)
$339
 $187
 $1,071
 $338
 $215
Cash Dividends
   on Common Stock (in millions)
$206
 $312
 $317
 $272
 $131
Return on Average Common Equity (percent)(a)
12.69
 4.62
 22.39
 9.79
 10.16
Total Assets (in millions)$14,300
 $14,883
 $15,206
 $15,169
 $8,905
Property, Plant, and Equipment
   In Service (in millions)
$13,270
 $13,271
 $13,755
 $12,728
 $7,275
Capitalization (in millions):         
Common stockholders' equity(b)
$2,368
 $2,968
 $5,138
 $4,430
 $2,483
Noncontrolling interests(b)
4,254
 4,316
 1,360
 1,245
 781
Redeemable noncontrolling interests
 
 
 164
 43
Long-term debt3,574
 4,418
 5,071
 5,068
 2,719
Total (excluding amounts due within one year)$10,196
 $11,702
 $11,569
 $10,907
 $6,026
Capitalization Ratios (percent):         
Common stockholders' equity(b)
23.2
 25.4
 44.4
 40.6
 41.2
Noncontrolling interests(b)
41.7
 36.9
 11.8
 11.4
 13.0
Redeemable noncontrolling interests
 
 
 1.5
 0.7
Long-term debt35.1
 37.7
 43.8
 46.5
 45.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Kilowatt-Hour Sales (in millions):         
Wholesale — non-affiliates36,358
 37,164
 35,920
 23,213
 18,544
Wholesale — affiliates12,928
 12,603
 12,811
 15,950
 16,567
Total49,286
 49,767
 48,731
 39,163
 35,111
Plant Nameplate Capacity
   Ratings (year-end) (megawatts)
12,247
 11,888
 12,940
 12,442
 9,808
Maximum Peak-Hour Demand (megawatts):         
Winter3,436
 2,867
 3,421
 3,469
 3,923
Summer4,460
 4,210
 4,224
 4,303
 4,249
Annual Load Factor (percent)49.8
 52.2
 49.1
 50.0
 49.0
Plant Availability (percent)98.8
 99.9
 99.9
 91.6
 93.1
Source of Energy Supply (percent):         
Natural gas69.5
 68.1
 67.7
 79.4
 89.5
Solar, Wind, and Biomass23.7
 23.6
 22.8
 12.1
 4.3
Purchased power —         
From non-affiliates6.1
 6.6
 7.8
 6.8
 4.7
From affiliates0.7
 1.7
 1.7
 1.7
 1.5
Total100.0
 100.0
 100.0
 100.0
 100.0
Employees (year-end)(c)
460
 491
 541
 
 
(a)As a result of the Tax Reform Legislation, Southern Power recorded an income tax expense (benefit) of $79 million and $(743) million in 2018 and 2017, respectively.
(b)See Note 15 to the financial statements under "Southern Power – Sales of Renewable Facility Interests" in Item 8 herein for additional information on 2018 changes in noncontrolling interests.
(c)Prior to December 2017, Southern Power had no employees but was billed for employee-related costs from SCS.

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Successor(a)
  
Predecessor(a)
 2019 
2018(b)
 2017 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015
Operating Revenues (in millions)$3,792
 $3,909
 $3,920
 $1,652
  $1,905
 $3,941
Net Income Attributable to
Southern Company Gas
(in millions)
(c)
$585
 $372
 $243
 $114
  $131
 $353
Cash Dividends on Common Stock
(in millions)
$471
 $468
 $443
 $126
  $128
 $244
Return on Average Common Equity
(percent)
(c)
6.47
 4.23
 2.68
 1.74
  3.31
 9.05
Total Assets (in millions)$21,687
 $21,448
 $22,987
 $21,853
  $14,488
 $14,754
Gross Property Additions
(in millions)
$1,418
 $1,399
 $1,525
 $632
  $548
 $1,027
Capitalization (in millions):            
Common stockholders' equity$9,506
 $8,570
 $9,022
 $9,109
  $3,933
 $3,975
Long-term debt5,845
 5,583
 5,891
 5,259
  3,709
 3,275
Total (excluding amounts due within
one year)
$15,351
 $14,153
 $14,913
 $14,368
  $7,642
 $7,250
Capitalization Ratios (percent):            
Common stockholders' equity61.9
 60.6
 60.5
 63.4
  51.5
 54.8
Long-term debt38.1
 39.4
 39.5
 36.6
  48.5
 45.2
Total (excluding amounts due within
one year)
100.0
 100.0
 100.0
 100.0
  100.0
 100.0
Service Contracts (period-end)
 
 1,184,257
 1,198,263
  1,197,096
 1,205,476
Customers (period-end)            
Gas distribution operations4,277,219
 4,247,804
 4,623,249
 4,586,477
  4,544,489
 4,557,729
Gas marketing services630,682
 697,384
 773,984
 655,999
  630,475
 654,475
Total4,907,901
 4,945,188
 5,397,233
 5,242,476
  5,174,964
 5,212,204
Employees (period-end)4,446
 4,389
 5,318
 5,292
  5,284
 5,203
(a)As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
(c)As a result of the Tax Reform Legislation, Southern Company Gas recorded income tax expense of $93 million in 2017.

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Successor(a)
  
Predecessor(a)
 2019 
2018(b)
 2017 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015
Operating Revenues (in millions)            
Residential$1,737
 $1,886
 $2,100
 $899
  $1,101
 $2,129
Commercial485
 546
 641
 260
  310
 617
Transportation907
 944
 811
 269
  290
 526
Industrial121
 140
 159
 74
  72
 203
Other542
 393
 209
 150
  132
 466
Total$3,792
 $3,909
 $3,920
 $1,652
  $1,905
 $3,941
Heating Degree Days:            
Illinois6,136
 6,101
 5,246
 1,903
  3,340
 5,433
Georgia2,157
 2,588
 1,970
 727
  1,448
 2,204
Gas Sales Volumes
(mmBtu in millions):
            
Gas distribution operations            
Firm677
 721
 667
 274
  396
 695
Interruptible92
 95
 95
 47
  49
 99
Total769
 816
 762
 321
  445
 794
Gas marketing services            
Firm:            
Georgia33
 37
 32
 13
  21
 35
Illinois12
 13
 12
 4
  8
 13
Other15
 20
 18
 5
  7
 11
Interruptible large commercial and
industrial
14
 14
 14
 6
  8
 14
Total74
 84
 76
 28
  44
 73
Market share in Georgia (percent)28.9
 29.0
 29.2
 29.4
  29.3
 29.7
Wholesale gas services            
Daily physical sales (mmBtu in
millions/day
)
6.4
 6.7
 6.4
 7.2
  7.6
 6.8
(a)As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.


Table of ContentsIndex to Financial Statements

Item 7.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Page
Combined Management's Discussion and Analysis of Financial Condition and Results of Operations
This section generally discusses 2019 and 2018 items and year-to-year comparisons between 2019 and 2018. Discussions of 2017 items and year-to-year comparisons between 2018 and 2017 that are not included in this Annual Report on Form 10-K can be found in Item 7 of each Registrant's Annual Report on Form 10-K for the year ended December 31, 2016, Southern Power's revenues were derived approximately 16.5% from Georgia Power. Southern Power actively pursues replacement PPAs prior2018, which was filed with the SEC on February 19, 2019. The following Management's Discussion and Analysis of Financial Condition and Results of Operations is a combined presentation; however, information contained herein relating to any individual Registrant is filed by such Registrant on its own behalf and each Registrant makes no representation as to information related to the expiration of its current PPAsother Registrants.
Item 7A.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" in Item 7 herein and anticipates thatNote 1 to the revenues attributablefinancial statements under "Financial Instruments" in Item 8 herein. Also see Notes 13 and 14 to one customer may be replaced by revenues from a new customer; however, the expiration of any of Southern Power's current PPAs without the successful remarketing of a replacement PPA could have a material negative impact on Southern Power's earnings but is not expected to have a material impact on Southern Company's earnings.financial statements in Item 8 herein.

I-6

Table of ContentsIndex to Financial Statements


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS
Southern Company and Subsidiary Companies 2019 Annual Report

OVERVIEW
Business Activities
Southern Company is a holding company that owns all of the common stock of three traditional electric operating companies, as well as the parent entities of Southern Power and Southern Company Gas, and owns other direct and indirect subsidiaries. The primary businesses of the Southern Company system are electricity sales by the traditional electric operating companies and Southern Power and the distribution of natural gas by Southern Company Gas. Southern Company's reportable segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas.
The traditional electric operating companies – Alabama Power, Georgia Power, and Mississippi Power – are vertically integrated utilities providing electric service to retail customers in three Southeastern states in addition to wholesale customers in the Southeast.
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas through thegas. Southern Company Gas owns natural gas distribution utilities. Southern Company Gasutilities in four states – Illinois, Georgia, Virginia, and Tennessee – and is also involved in several other businesses that are complementary to thebusinesses. Southern Company Gas manages its business through four reportable segments – gas distribution ofoperations, gas pipeline investments, wholesale gas services, which includes Sequent, a natural gas includingasset optimization company, and gas marketing services, wholesale gas services, and gas midstream operations.
Gas distribution operations, the largest segmentwhich includes SouthStar, a provider of Southern Company Gas' business, operates, constructs, and maintains 81,600 miles of natural gas pipelines and 14 storage facilities, with total capacity of 158 Bcf, to provide natural gas to residential, commercial, and industrial customers. Gas distribution operations serves approximately 4.6 million customers across seven states and has rates of return that are regulated by each individual state in return for exclusive franchises.
Gas marketing services is comprised of Southstar Energy Services, LLC (SouthStar) and Nicor Energy Services Company (doing business as Pivotal Home Solutions) and provides natural gas commodity and related services to customers in competitive markets or markets that provide for customer choice. SouthStar, serving approximately 643,000 natural gas commodity customers, markets gas to residential, commercial, and industrial customers and offers energy-related products that provide natural gas price stability and utility bill management. Pivotal Home Solutions, serving approximately 1.2 million service contracts, provides a suite of home protection products and services that offers homeowners predictability regarding their energy service delivery, systems, and appliances.
Wholesale gas services consists of Sequent Energy Management, L.P. and engages into natural gas storagemarkets – and gas pipeline arbitrageone non-reportable segment, all other. See Notes 7 and provides16 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of the Southern Company system's electric service and natural gas asset managementbusinesses. These factors include the ability to maintain constructive regulatory environments, to maintain and grow sales and customers, and to effectively manage and secure timely recovery of prudently-incurred costs. These costs include those related logistical services to most ofprojected long-term demand growth; stringent environmental standards, including CCR rules; safety; system reliability and resilience; fuel; natural gas; restoration following major storms; and capital expenditures, including constructing new electric generating plants and expanding and improving the electric transmission and electric and natural gas distribution systems.
The traditional electric operating companies and natural gas distribution utilities have various regulatory mechanisms that address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Southern Company system for the foreseeable future. See Note 2 to the financial statements for additional information.
Southern Power's future earnings will depend upon the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as non-affiliate companies.
Gas midstream operations includes joint ventures in pipeline investments (including a 50% ownership interest in SNGSouthern Power's ability to execute its growth strategy and two significant pipeline construction projects) as well as a 50% joint ownership in a significant pipeline projectto develop and wholly-owned natural gas storage facilities that enableconstruct generating facilities. In addition, Southern Power's future earnings will depend upon the provisionavailability of diverse sources of natural gas supplies to the customers of Southern Company Gas. On September 1, 2016, Southern Company Gas paid $1.4 billion to acquire a 50% equity interest in SNG,federal and state ITCs and PTCs on its renewable energy projects, which is the owner of a 7,000 mile pipeline connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee.
For additional information on Southern Company Gas' business activities, see MANAGEMENT'S DISCUSSION AND ANALYSIS – OVERVIEW – "Business Activities" and –could be impacted by future tax legislation. See FUTURE EARNINGS POTENTIAL of – "Acquisitions and Dispositions," "Construction Programs," and "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
Southern Company Gas in Item 7 herein.
Other Businesses
PowerSecure provides productsCompany's other business activities include providing energy solutions to electric utilities and servicestheir customers in the areas of distributed generation, energy efficiency,storage and utility infrastructure. Southern Company acquired PowerSecure on May 9, 2016 for an aggregate purchase price of $429 million.
Southern Holdings is an intermediate holding subsidiary, primarily for Southern Company'srenewables, and energy efficiency. Other business activities also include investments in telecommunications, leveraged leaseslease projects, and also for energy services.
Southern LINC provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these servicesgas storage facilities. Management continues to evaluate the public. Southern LINC delivers multiple wireless communication options including push to talk, cellular service, text messaging, wireless internet access, and wireless data. Its system covers approximately 127,000 square miles in the Southeast. Southern LINC also provides fiber cable services within the Southeast through its subsidiary, Southern Telecom, Inc.
These efforts to invest in and develop new business opportunities offer potential returns exceeding thosecontribution of rate-regulated operations. However,each of these activities also involve a higher degree of risk.to total shareholder return and may pursue acquisitions, dispositions, and other strategic ventures or investments accordingly.
Construction Programs
Table of ContentsIndex to Financial Statements
The subsidiary companies of Southern Company are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. For estimated construction and environmental expenditures for the periods 2017 through 2021, see
COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" of (continued)
Southern Company each traditionaland Subsidiary Companies 2019 Annual Report

Recent Developments
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax).
Alabama Power
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, as well as the acquisition of an existing combined cycle facility for a total capital investment of approximately $1.1 billion. The related costs would be recovered through existing rate mechanisms. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama Power" herein for additional information.
Georgia Power
Rate Case
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, including estimated rate increases totaling $342 million, $181 million, and $386 million effective January 1, 2020, January 1, 2021, and January 1, 2022, respectively. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans2019 ARP" herein for additional information.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric operatinggenerating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its total project capital cost forecast to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds), with respect to Georgia Power's ownership interest. As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. Following the vote to continue construction, Georgia Power entered into agreements to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and to provide funding with respect to a MEAG Power wholly-owned subsidiary's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics. In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4.
In March 2019, Georgia Power entered into the Amended and Restated Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4, up to approximately $5.130 billion. At December 31, 2019, Georgia Power had a total of $3.8 billion of borrowings outstanding under the related multi-advance credit facilities.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein and Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million related to the Kemper County energy facility, which was suspended in 2017, primarily associated with the expected close out of a DOE contract related to the Kemper County energy facility, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In December 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. Mine reclamation activities are expected to be substantially completed in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion, and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy Facility" and Note 3 to the financial statements for additional information, including remaining contingencies related to the Kemper IGCC.
On November 26, 2019, Mississippi Power filed a base rate case (Mississippi Power 2019 Base Rate Case) with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a 53% average equity ratio and a 7.728% return on investment. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under "Mississippi Power2019 Base Rate Case" for additional information.
Southern Power
During 2019, Southern Power completed construction and achieved commercial operation of the 100-MW Wildhorse Mountain wind facility, acquired and continued construction of the 136-MW Skookumchuck wind facility, and continued construction of the 200-MW Reading wind facility. In addition, Southern Power acquired a majority interest in DSGP, an affiliate of Bloom Energy, that owns and operates fuel cell generation facilities, for a total purchase price of approximately $167 million.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments.
Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Power" and Construction ProgramsSouthern Power" herein for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
During 2019, the natural gas distribution utilities have been involved in the following regulatory proceedings:
On September 25, 2019, the Virginia Commission approved Virginia Natural Gas' Steps to Advance Virginia's Energy (SAVE) program request to amend and extend the program through 2024 with estimated capital spend totaling approximately $365 million.
On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase for Nicor Gas, including $65 million related to the recovery of investments under the Investing in Illinois program, which became effective October 8, 2019.
On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase for Atlanta Gas Light, effective January 1, 2020.
See FUTURE EARNINGS POTENTIAL – "Regulatory MattersSouthern Company GasRate Proceedings" herein and Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
Also during 2019, Southern Company Gas in Item 7 herein. The Southern Company system's construction program consistsrecorded a pre-tax impairment charge of capital investment and capital expenditures to comply with environmental statutes and regulations. The traditional electric operating companies also anticipate costs associated with closure and groundwater monitoring under the Disposal of Coal Combustion Residuals from Electric Utilities final rule (CCR Rule), which are reflected in the Southern Company system's asset retirement obligation liabilities. In 2017, the construction program is expected to be apportioned approximately as follows:

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Table of ContentsIndex to Financial Statements

 
Southern
Company
system(a)(b)
Alabama
Power
Georgia
Power
Gulf
Power
Mississippi
Power
 (in billions)
New Generation$1.0
$
$0.7
$
$0.3
Environmental Compliance(c)
0.9
0.5
0.4


Generation Maintenance0.9
0.4
0.3
0.1
0.1
Transmission0.8
0.3
0.4


Distribution1.0
0.4
0.5
0.1
0.1
Nuclear Fuel0.2
0.1
0.1


General Plant0.4
0.1
0.2

0.1
 5.3
1.9
2.6
0.2
0.5
Southern Power(d)
1.6
    
Southern Company Gas(e)
1.7
    
Other subsidiaries0.5
    
Total(a)
$9.1
$1.9
$2.6
$0.2
$0.5
(a)Totals do not add due to rounding.
(b)Includes the traditional electric operating companies, Southern Power, and Southern Company Gas, as well as the other subsidiaries. See "Other Businesses" herein for additional information.
(c)
Reflects cost estimates for environmental regulations. These estimated expenditures do not include any potential compliance costs that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from new, existing, and modified or reconstructed fossil-fuel-fired electric generating units or costs associated with closure and groundwater monitoring under the CCR Rule. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" of Southern Company and each traditional electric operating company in Item 7 herein for additional information.
(d)Includes approximately $0.8 billion for potential acquisitions and/or construction of new generating facilities.
(e)Includes costs for ongoing capital projects associated with infrastructure improvement programs in six different states that have been previously approved by their applicable state regulatory agencies. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Infrastructure Replacement Programs and Capital Projects" of Southern Company Gas in Item 7 herein for additional information.
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental statutes and regulations; the outcome of any legal challenges to the environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can be no assurance that costs$91 million ($69 million after tax) related to capital expenditures will be fully recovered. Additionally, planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy.
In addition, the construction program includes the development and construction of new electric generating facilities with designs that have not been finalized or previously constructed, including first-of-a-kind technology, which may resulta natural gas storage facility in revised estimates during construction.Louisiana. See Note 3 to the financial statements under "Other MattersSouthern Company Gas" for additional information.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Company Gas" herein for information regarding Southern Company Gas' 2018 disposition activity.
Key Performance Indicators
In striving to achieve attractive risk-adjusted returns while providing cost-effective energy to more than eight million electric and gas utility customers collectively, the traditional electric operating companies and Southern Company Gas continue to focus on several key performance indicators. These indicators include, but are not limited to, customer satisfaction, plant availability, electric and natural gas system reliability, and execution of major construction projects. In addition, Southern Company and Georgia Power under "Regulatory Mattersthe Subsidiary Registrants focus on earnings per share (EPS) and net income, respectively, as a key performance indicator. See RESULTS OF OPERATIONS herein for information on the Registrants' financial performance. See RESULTS OF OPERATIONSGeorgia Power"Southern Company GasNuclear Construction"Operating Metrics" for additional information on Southern Company Gas' operating metrics, including Heating Degree Days, customer count, and "Retail volumes of natural gas sold.
The financial success of the traditional electric operating companies and Southern Company Gas is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. The traditional electric operating companies use customer satisfaction surveys to evaluate their results and generally target the top quartile of these surveys in measuring performance. Reliability indicators are also used to evaluate results. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersNuclear Construction,Alabama PowerRate RSE" respectively, in Item 8and " – Mississippi PowerPerformance Evaluation Plan" herein for additional information regardingon Alabama Power's Rate RSE and Mississippi Power's PEP rate plan, respectively, both of which contain mechanisms that directly tie customer service indicators to the allowed equity return.
Southern Power continues to focus on several key performance indicators, including, but not limited to, the equivalent forced outage rate and contract availability to evaluate operating results and help ensure its ability to meet its contractual commitments to customers.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

RESULTS OF OPERATIONS
Southern Company
Consolidated net income attributable to Southern Company was $4.7 billion in 2019, an increase of $2.5 billion, or 112.9%, from the prior year. The increase was primarily due to the $2.6 billion ($1.4 billion after tax) gain on the sale of Gulf Power in 2019 and a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4. Also see Note 3See "Electricity BusinessEstimated Loss on Plants Under Construction" herein and Notes 2 and 15 to the financial statements of under "Georgia PowerNuclear Construction" and "Southern Company and Mississippi Power under "Integrated Coal Gasification Combined Cycle" in Item 8 herein," respectively, for additional information regarding Mississippi Power's constructioninformation.
Basic EPS was $4.53 in 2019 and $2.18 in 2018. Diluted EPS, which factors in additional shares related to stock-based compensation, was $4.50 in 2019 and $2.17 in 2018. EPS for 2019 and 2018 was negatively impacted by $0.11 and $0.04 per share, respectively, as a result of increases in the Kemper IGCC.
Also see "Regulationaverage shares outstanding. See Note 8 to the financial statements under "Outstanding Classes of Capital StockEnvironmental Statutes and Regulations" hereinSouthern Company" for additional information with respect to certain existing and proposed environmental requirements and PROPERTIES – "Jointly-Owned Facilities" in Item 2 herein for additional information concerning Alabama Power's, Georgia Power's, and Southern Power's joint ownership of certain generating units and related facilities with certain non-affiliated utilities.information.

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Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.46 in 2019 and $2.38 in 2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. For 2019, the dividend payout ratio was 54% compared to 109% for 2018. The decrease was due to the increase in earnings in 2019.
Discussion of Southern Company's results of operations is divided into three parts – the Southern Company system's primary business of electricity sales, its gas business, and its other business activities.
 2019 2018
 (in millions)
Electricity business$3,268
 $2,304
Gas business585
 372
Other business activities886
 (450)
Net Income$4,739
 $2,226
Electricity Business
Southern Company's electric utilities generate and sell electricity to retail and wholesale customers. The results of operations discussed below include the results of Gulf Power through December 31, 2018. See Note 15 to the financial statements under "Southern Company" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report


A condensed statement of income for the electricity business follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Electric operating revenues$17,095
 $(1,476)
Fuel3,622
 (1,015)
Purchased power816

(155)
Cost of other sales76
 10
Other operations and maintenance4,479
 (156)
Depreciation and amortization2,472
 (93)
Taxes other than income taxes1,011
 (87)
Estimated loss on plants under construction24
 (1,073)
Impairment charges3
 (153)
(Gain) loss on dispositions, net(21) (21)
Total electric operating expenses12,482
 (2,743)
Operating income4,613
 1,267
Allowance for equity funds used during construction121
 (10)
Interest expense, net of amounts capitalized987
 (48)
Other income (expense), net234
 90
Income taxes708
 501
Net income3,273
 894
Less:   
Dividends on preferred and preference stock of subsidiaries15
 (1)
Net income (loss) attributable to noncontrolling interests(10) (69)
Net Income Attributable to Southern Company$3,268
 $964
Electric Operating Revenues
Electric operating revenues for 2019 were $17.1 billion, reflecting a $1.5 billion decrease from 2018. Details of electric operating revenues were as follows:
 2019 2018
 (in millions)
Retail electric — prior year$15,222
  
Estimated change resulting from —   
Rates and pricing581
  
Sales decline(143)  
Weather29
  
Fuel and other cost recovery(392)  
Gulf Power disposition(1,213)  
Retail electric — current year14,084
 $15,222
Wholesale electric revenues2,152
 2,516
Other electric revenues636
 664
Other revenues223
 169
Electric operating revenues$17,095
 $18,571
Percent change(7.9)% 0.2%
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Retail electric revenues decreased $1.1 billion, or 7.5%, in 2019 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 2019 was primarily due to the impacts of Alabama Power's customer bill credits issued in 2018 related to the Tax Reform Legislation, additional capital investments recovered through Rate CNP Compliance, and lower Rate RSE customer refund in 2019 as compared to the prior year; Georgia Power's higher contributions from commercial and industrial customers with variable demand-driven pricing, NCCR rate increase effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018; and Mississippi Power's PEP and ECO Plan rate increases effective for the first billing cycle of September 2018.
Electric rates for the traditional electric operating companies include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of PPA costs, and do not affect net income. The traditional electric operating companies each have one or more regulatory mechanisms to recover other costs such as environmental and other compliance costs, storm damage, new plants, and PPA capacity costs.
See Note 2 to the financial statements under "Alabama Power," "Georgia Power," and "Mississippi Power" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Wholesale electric revenues consist of PPAs and short-term opportunity sales. Wholesale electric revenues from PPAs (other than solar and wind PPAs) have both capacity and energy components. Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment. Energy revenues will vary depending on fuel prices, the market prices of wholesale energy compared to the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Energy sales from solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or through a fixed price related to the energy. As a result, the ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Wholesale electric revenues at Mississippi Power include FERC-regulated MRA sales as well as market-based sales. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Southern Company system's variable cost to produce the energy.
Wholesale electric revenues from power sales were as follows:
 2019 2018
 (in millions)
Capacity and other$529
 $620
Energy1,623
 1,896
Total$2,152
 $2,516
In 2019, wholesale revenues decreased $364 million, or 14.5%, as compared to the prior year due to decreases of $273 million in energy revenues and $91 million in capacity revenues. Excluding the $28 million decrease associated with the sale of Gulf Power, energy revenues decreased $165 million at Southern Power and $80 million at the traditional electric operating companies. The decrease at Southern Power related to a $113 million decrease primarily in non-PPA short-term sales and a decrease in the market price of energy, as well as a $51 million decrease primarily in sales under PPAs from natural gas facilities. The decrease at the traditional electric operating companies was primarily due to lower natural gas prices. Excluding the $26 million decrease associated with the sale of Gulf Power, the decrease in capacity revenues was primarily related to the sales of Southern Power's Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) in December 2018 and Southern Power's Plant Nacogdoches in June 2019. See Note 15 to the financial statements for additional information.
Other Electric Revenues
Other electric revenues decreased $28 million, or 4.2%, in 2019 as compared to the prior year. The decrease was primarily due to a decrease of $66 million related to the sale of Gulf Power, partially offset by increases at Georgia Power of $13 million in regulated power delivery construction and maintenance contracts and $11 million from outdoor lighting LED conversions and sales, as well as an increase at Alabama Power of $9 million from pole attachment agreements.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
       
Adjusted(b)
 Total
KWHs
 Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
(a)
 Total KWH Percent Change 
Weather-Adjusted Percent Change(a)
 (in billions)        
Residential48.5
 (11.1)% (10.7)% (1.1)% (0.8)%
Commercial49.1
 (8.1) (8.6) (1.1) (1.6)
Industrial50.1
 (6.1) (6.1) (2.9) (2.9)
Other0.8
 (9.1) (9.0) (5.8) (5.7)
Total retail148.5
 (8.5) (8.4)% (1.7) (1.8)%
Wholesale48.0
 (3.9)   (2.6)  
Total energy sales196.5
 (7.4)%   (1.9)%  
(a)Weather-adjusted KWH sales are estimated by removing from KWH sales the effect of deviations from normal temperature conditions, based on statistical models of the historical relationship between temperatures and energy sales. Normal temperature conditions are defined as those experienced in the applicable service territory over a specified historical period. This metric is useful because it allows trends in historical operations to be evaluated apart from the influence of weather conditions. Management also considers this metric in developing long-term capital and financial plans.
(b)Kilowatt-hour sales comparisons to the prior year were significantly impacted by the disposition of Gulf Power on January 1, 2019. These changes exclude Gulf Power.
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Excluding the impact of the Gulf Power disposition on January 1, 2019, weather-adjusted retail energy sales decreased 2.7 billion KWHs in 2019 as compared to the prior year primarily due to lower customer usage. Weather-adjusted residential usage decreases are primarily attributable to an increase in energy-efficient residential appliances and energy saving initiatives, partially offset by customer growth. Weather-adjusted commercial usage decreases are primarily attributable to an increase in energy saving initiatives and an ongoing migration to the electronic commerce business model. Industrial usage decreases are a result of changes in production levels primarily in the primary metals, paper, chemicals, and textiles sectors.
See "Electric Operating Revenues" above for a discussion of significant changes in wholesale revenues related to changes in price and KWH sales.
Other Revenues
Other revenues increased $54 million, or 32.0%, in 2019 as compared to the prior year. The increase was primarily due to increases at Georgia Power of $20 million from unregulated sales associated with new energy conservation projects and $14 million from unregulated power delivery construction and maintenance contracts, as well as an increase at Alabama Power of $11 million in unregulated sales of products and services.
Fuel and Purchased Power Expenses
The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the electric utilities purchase a portion of their electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the Southern Company system's generation and purchased power were as follows:
 2019 
2018(a)
Total generation (in billions of KWHs)
187
 191
Total purchased power (in billions of KWHs)
18
 14
Sources of generation (percent) —

 
Gas52
 48
Coal22
 27
Nuclear16
 16
Hydro3
 3
Other7
 6
Cost of fuel, generated (in cents per net KWH) 

 
Gas2.36
 2.76
Coal2.87
 2.93
Nuclear0.79
 0.80
Average cost of fuel, generated (in cents per net KWH)
2.20
 2.46
Average cost of purchased power (in cents per net KWH)(b)
5.01
 5.94
(a)Excludes Gulf Power, which was sold on January 1, 2019.
(b)Average cost of purchased power includes fuel purchased by the Southern Company system for tolling agreements where power is generated by the provider.
In 2019, total fuel and purchased power expenses were $4.4 billion, a decrease of $1.2 billion, or 20.9%, as compared to the prior year. Excluding approximately $511 million associated with the sale of Gulf Power, the decrease was primarily the result of a $575 million decrease in the average cost of fuel and purchased power and an $84 million net decrease in the volume of KWHs generated and purchased.
Fuel and purchased power energy transactions at the traditional electric operating companies are generally offset by fuel revenues and do not have a significant impact on net income. See FUTURE EARNINGS POTENTIAL – "Regulatory Matters" herein for additional information. Fuel expenses incurred under Southern Power's PPAs are generally the responsibility of the counterparties and do not significantly impact net income.
Fuel
In 2019, fuel expense was $3.6 billion, a decrease of $1.0 billion, or 21.9%, as compared to the prior year. Excluding approximately $309 million related to Gulf Power in 2018, the decrease was primarily due to an 18.1% decrease in the volume of KWHs generated by coal, a 14.5% decrease in the average cost of natural gas per KWH generated, and a 2.1% decrease in the average cost of coal per KWH generated, partially offset by a 5.0% increase in the volume of KWHs generated by natural gas.
Financing Programs
See each of the registrant's MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY in Item 7 herein and Note 68 to the financial statements of each registrant in Item 8 herein for information concerning financing programs.
Fuel Supply
Electric
The traditional electric operating companies' and SEGCO's supply of electricity is primarily fueled by natural gas and coal. Southern Power's supply of electricity is primarily fueled by natural gas. See MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION – "Electricity"Southern CompanyElectricity BusinessFuel and Purchased Power Expenses" of Southern CompanyExpenses" and MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATION – "Fuelunder "Fuel and Purchased Power Expenses"Expenses" for each of eachthe traditional electric operating companycompanies in Item 7 herein for information regarding the electricity generated and the average cost of fuel in cents per net KWH generated for the years 2014 through 2016.2018 and 2019.
The traditional electric operating companies have agreements in place from which they expect to receive substantially all of their 2020 coal burn requirements in 2017.requirements. These agreements have terms ranging between one and four years. In 2016, the weighted average sulfur content of all coal burned by the traditional electric operating companies was 0.98% sulfur. This sulfur level, along with bankedFuel procurement specifications, emission allowances, environmental control systems, and purchased sulfur dioxide allowances,fuel changes have allowed the traditional electric operating companies to remain within limits set by Phase I of the Cross-State Air Pollution Rule (CSAPR) under the Clean Air Act. In 2016, the Southern Company system did not purchase any sulfur dioxide allowances, annual nitrogen oxide emission allowances, or seasonal nitrogen oxide emission allowances from the market.applicable environmental regulations. As any additionalnew environmental regulations are proposed that impact the utilization of coal, the traditional electric operating companies' fuel mix will be monitored to help ensure that the traditional electric operating companies remain in compliance with applicable laws and regulations. Additionally, Southern Company and the traditional electric operating companies will continue to evaluate the need to purchase additional emissions allowances, the timing of capital expenditures for emissionsenvironmental control equipment, and potential unit retirements and replacements. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of Southern Company, each traditional electric operating company, and Southern Power"Environmental Matters" in Item 7 herein for additional information on environmental matters.
SCS, acting on behalf of the traditional electric operating companies and Southern Power Company, has agreements in place for the natural gas burn requirements of the Southern Company system. For 2017,2020, SCS has contracted for 477530 Bcf of natural gas supply under agreements with remaining terms up to 1514 years. In addition to natural gas supply, SCS has contracts in place for both firm natural gas transportation and storage. Management believes these contracts provide sufficient natural gas supplies, transportation, and storage to ensure normal operations of the Southern Company system's natural gas generating units.
Alabama Power and Georgia Power have multiple contracts covering their nuclear fuel needs for uranium, conversion services, enrichment services, and fuel fabrication. The uranium, conversion services, and fuel fabrication contracts are forwith remaining terms of less than 10 years with varying expiration dates. The term lengths for the enrichment services contracts are for less than 15 years with varying expiration dates.ranging from one to 14 years. Management believes suppliers have sufficient nuclear fuel production capability to permit the normal operation of the Southern Company system's nuclear generating units.
Changes in fuel prices to the traditional electric operating companies are generally reflected in fuel adjustment clauses contained in rate schedules. See "Rate"Rate Matters – Rate Structure and Cost Recovery Plans"Plans" herein for additional information. Southern Power's natural gas PPAs (excluding solar and wind) generally provide that the counterparty is responsible for substantially all of the cost of fuel.
Alabama Power and Georgia Power have contracts with the United States, acting through the DOE, that provide for the permanent disposal of spent nuclear fuel. The DOE failed to begin disposing of spent fuel in 1998, as required by the contracts, and Alabama Power and Georgia Power have pursued and are pursuing legal remedies against the government for breach of contract. See Note 3 to the financial statements of Southern Company, Alabama Power, and Georgia Power under "Nuclear"Nuclear Fuel Disposal Costs"Costs" in Item 8 herein for additional information.
Natural Gas
Recent advancesAdvances in natural gas drilling in shale producing regions of the U.S.United States have resulted in historically high supplies of natural gas and relatively low prices for natural gas. Procurement plans for natural gas supply and transportation to serve regulated utility customers are reviewed and approved by the state regulatory agencies in whichthe states where Southern Company Gas operates. Southern Company Gas purchases natural gas supplies in the open market by contracting with producers and marketers and, for the natural gas distribution utilities except Nicor Gas, from its wholly-owned subsidiary, Sequent, Energy Management, L.P., under asset management agreements in

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states where such agreements are approved by the applicable state regulatory agency. Southern Company Gas also contracts for transportation and
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storage services from interstate pipelines that are regulated by the FERC. When firm pipeline services are temporarily not needed, Southern Company Gas may release the services in the secondary market under FERC-approved capacity release provisions or utilize asset management arrangements, thereby reducing the net cost of natural gas charged to customers for most of the natural gas distribution utilities. Peak-use requirements are met through utilization of company-owned storage facilities, pipeline transportation capacity, purchased storage services, peaking facilities, and other supply sources, arranged by either transportation customers or Southern Company Gas.
Territory Served by the Southern Company System
Traditional Electric Operating Companies and Southern Power
The territory in which the traditional electric operating companies provide retail electric service comprises most of the states of Alabama and Georgia, together with the northwestern portion of Florida and southeastern Mississippi. In this territory there are non-affiliated electric distribution systems that obtain some or all of their power requirements either directly or indirectly from the traditional electric operating companies. As of December 31, 2016,2019, the territory had an area of approximately 120,000116,000 square miles and an estimated population of approximately 1716 million. Southern Power sells wholesale electricity at market-based rates in the wholesale market,across various U.S. utility markets, primarily to investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load serving entities.load-serving entities, as well as commercial and industrial customers.
Alabama Power is engaged, within the State of Alabama, in the generation, transmission, distribution, and purchase of electricity and the sale of electric service, at retail in approximately 400 cities and towns (including Anniston, Birmingham, Gadsden, Mobile, Montgomery, and Tuscaloosa), as well as in rural areas, and at wholesale to 1411 municipally-owned electric distribution systems, 11all of which are served indirectly through sales to AMEA, and two rural distributing cooperative associations. The sales contract with AMEA is scheduled to expire on December 31, 2025. Alabama Power owns coal reserves near its Plant Gorgas site and uses the output of coal from the reserves in its generating plants. In addition, Alabama Power also sells, and cooperates with dealers in promoting the sale of, electric appliances.appliances and products and also markets and sells outdoor lighting services.
Georgia Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within the State of Georgia, at retail in over 600 communities530 cities and towns (including Athens, Atlanta, Augusta, Columbus, Macon, Rome, and Savannah), as well as in rural areas, and at wholesale currently to OPC, MEAG Power, Dalton, various EMCs, and non-affiliated utilities. Georgia Power also markets and sells outdoor lighting services.
Gulf Power is engaged, within the northwestern portion of Florida, in the generation, transmission, distribution,services and purchase of electricity and the sale of electric service, at retail in 71 communities (including Pensacola, Panama City, and Fort Walton Beach), as well as in rural areas, and at wholesale to a non-affiliated utility.other customer-focused utility services.
Mississippi Power is engaged in the generation, transmission, distribution, and purchase of electricity and the sale of electric service within 23 counties in southeastern Mississippi, at retail in 123 communities (including Biloxi, Gulfport, Hattiesburg, Laurel, Meridian, and Pascagoula), as well as in rural areas, and at wholesale to one municipality, six rural electric distribution cooperative associations, and one generating and transmitting cooperative.
For information relating to KWH sales by customer classification for the traditional electric operating companies, see MANAGEMENT'S DISCUSSION AND ANALYSIS – RESULTS OF OPERATIONS in Item 7 herein. For information relating to the number of retail customers served by customer classification for the traditional electric operating companies, see SELECTED FINANCIAL DATA of Southern Company and each traditional electric operating company in Item 76 herein. Also, for information relating to the sources of revenues for Southern Company, each traditional electric operating company, and Southern Power, reference is made tosee Item 7 herein and Note 1 to the financial statements under "RevenuesTraditional Electric Operating Companies" and " – Southern Power" and Note 4 to the financial statements in Item 8 herein.
The RUS has authority to make loans to cooperative associations or corporations to enable them to provide electric service to customers in rural sections of the country. As of December 31, 2016,2019, there were 71approximately 62 electric cooperative organizationsdistribution systems operating in the territoryterritories in which the traditional electric operating companies provide electric service at retail or wholesale.
One of these organizations, PowerSouth, is a generating and transmitting cooperative selling power to several distributing cooperatives, municipal systems, and other customers in south Alabama and northwest Florida.Alabama. As of December 31, 2016,2019, PowerSouth owned generating units with approximately 2,100 MWs of nameplate capacity, including an undivided 8.16% ownership interest in Alabama Power's Plant Miller Units 1 and 2. PowerSouth's facilities were financed with RUS loans secured by long-term contracts requiring distributing cooperatives to take their requirements from PowerSouth to the extent such energy is available. See PROPERTIES – "Jointly-Owned Facilities""Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for details of Alabama Power's joint-ownership with PowerSouth of a portion of Plant Miller. Alabama Power has a 15-year system supply agreementagreements with PowerSouth to provide 200 MWs of year-round capacity service through January 31, 2024 and 200 MWs of winter-only capacity service through December 31, 2023. In August 2019, Alabama Power agreed to provide PowerSouth an additional 100 MWs of year-round capacity service from November 1, 2020 through February 28, 2023, with anthe option to extend and renegotiate in the event Alabama Power builds new generation or contracts for new capacity.through May 31, 2023.
Alabama Power and Gulf Power havehas entered into a separate agreementsagreement with PowerSouth involving interconnection between their respective systems. The delivery of capacity and energy from PowerSouth to certain distributing cooperatives in the

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service territories of Alabama Power and Gulf Power is governed by the Southern Company/PowerSouth Network Transmission Service Agreement. The rates for this service to PowerSouth are on file with the FERC.
Four
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OPC is an EMC owned by its 38 retail electric cooperative associations, financed bydistribution cooperatives, which provide retail electric service to customers in Georgia. OPC provides wholesale electric power to its members through its generation assets, some of which are jointly owned with Georgia Power, and power purchased from other suppliers. OPC and the RUS, operate within Gulf38 retail electric distribution cooperatives are members of Georgia Transmission Corporation, an EMC (GTC), which provides transmission services to its members and third parties. See PROPERTIES – "ElectricJointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information regarding Georgia Power's service territory. These cooperatives purchase their full requirements from PowerSouth and SEPA (a federal power marketing agency). A non-affiliated utility also operates within Gulf Power's service territory and purchases its full requirements from Gulf Power.jointly-owned facilities.
Mississippi Power has an interchange agreement with SMEPA,Cooperative Energy, a generating and transmitting cooperative, pursuant to which various services are provided.
As of December 31, 2016,2019, there were approximately 6572 municipally-owned electric distribution systems operating in the territory in which the traditional electric operating companies provide electric service at retail or wholesale.
As of December 31, 2016,2019, 48 municipally-owned electric distribution systems and one county-owned system received their requirements through MEAG Power, which was established by a Georgia state statute in 1975. MEAG Power serves these requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and purchases from other resources. MEAG Power also has a pseudo scheduling and services agreement with Georgia Power. Dalton serves its requirements from self-owned generation facilities, some of which are jointly-owned with Georgia Power, and through purchases from Georgia Power and Southern Power through a service agreement. See PROPERTIES – "Jointly-Owned Facilities""Jointly-Owned Facilities" in Item 2 herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
Georgia Power has entered into substantially similar agreements with Georgia Transmission Corporation,GTC, MEAG Power, and Dalton providing for the establishment of an integrated transmission system to carry the power and energy of all parties. The agreements require an investment by each party in the integrated transmission system in proportion to its respective share of the aggregate system load. See PROPERTIES – "Jointly-Owned Facilities""Jointly-Owned Facilities" in Item 2 herein for additional information.
Southern Power assumed or entered intohas PPAs with some of the traditional electric operating companies,Georgia Power, investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load serving entities.load-serving entities, as well as commercial and industrial customers. See "The"The Southern Company System – Southern Power" abovePower" herein and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Power"Southern Power's Power Sales Agreements" of Southern PowerAgreements" in Item 7 herein for additional information concerning Southern Power's PPAs.information.
SCS, acting on behalf of the traditional electric operating companies, also has a contract with SEPA providing for the use of the traditional electric operating companies' facilities at government expense to deliver to certain cooperatives and municipalities, entitled by federal statute to preference in the purchase of power from SEPA, quantities of power equivalent to the amounts of power allocated to them by SEPA from certain U.S. government hydroelectric projects.
Southern Company Gas
Southern Company Gas is engaged in the distribution of natural gas in sevenfour states through the natural gas distribution utilities. The natural gas distribution utilities construct, manage, and maintain intrastate natural gas pipelines and distribution facilities and include:facilities. Details of the natural gas distribution utilities at December 31, 2019 are as follows:
UtilityStateNumber of customersApproximate miles of pipe
  (in thousands) 
Nicor GasIllinois2,220
34,300
Atlanta Gas Light CompanyGeorgia1,603
33,100
Virginia Natural Gas, Inc.Virginia296
5,600
Elizabethtown GasNew Jersey287
3,200
Florida City GasFlorida108
3,700
Chattanooga Gas CompanyTennessee65
1,600
Elkton GasMaryland7
100
Total 4,586
81,600
UtilityStateNumber of customers
Approximate miles of pipe
  (in thousands) 
Nicor GasIllinois2,245
34,346
Atlanta Gas LightGeorgia1,661
33,844
Virginia Natural GasVirginia303
5,719
Chattanooga GasTennessee68
1,676
Total 4,277
75,585
For information relating to the sources of revenue for Southern Company Gas, see MANAGEMENT'S DISCUSSION AND ANALYSISItem 7 herein and Note 1 to the financial statements under "RevenuesRESULTS OF OPERATIONS and – FUTURE EARNINGS POTENTIAL of Southern Company Gas" and Note 4 to the financial statements in Item 78 herein.

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Competition
Electric
The electric utility industry in the U.S. is continuing to evolve as a result of regulatory and competitive factors. Among the early primary agents of change was the Energy Policy Act of 1992, which allowed IPPs to access a utility's transmission network in order to sell electricity to other utilities.
The competition for retail energy sales among competing suppliers of energy is influenced by various factors, including price, availability, technological advancements, service, and reliability. These factors are, in turn, affected by, among other influences, regulatory, political, and environmental considerations, taxation, and supply.
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The retail service rights of all electric suppliers in the State of Georgia are regulated by the Territorial Electric Service Act of 1973. Pursuant to the provisions of this Act, all areas within existing municipal limits were assigned to the primary electric supplier therein. Areas outside of such municipal limits were either to be assigned or to be declared open for customer choice of supplier by action of the Georgia PSC pursuant to standards set forth in this Act. Consistent with such standards,Act, the Georgia PSC has assigned substantially all of the land area in the state to a supplier. Notwithstanding such assignments, this Act provides that any new customer locating outside of 1973 municipal limits and having a connected load of at least 900 KWs may exercise a one-time choice for the life of the premises to receive electric service from the supplier of its choice.
Pursuant to the 1956 Utility Act, the Mississippi PSC issued "Grandfather Certificates" of public convenience and necessity to Mississippi Power and to six distribution rural cooperatives operating in southeastern Mississippi, then served in whole or in part by Mississippi Power, authorizing them to distribute electricity in certain specified geographically described areas of the state. The six cooperatives serve approximately 325,000 retail customers in a certificated area of approximately 10,300 square miles. In areas included in a "Grandfather Certificate," the utility holding such certificate may without further certification, extend or maintain its lines upelectric system subject to five miles; othercertain regulatory approvals; extensions within that areaof facilities by such utility, or extensions of facilities into that area by other utilities, may not be made except uponunless the Mississippi PSC grants a showing of, and a grant of a certificate of, public convenience and necessity.CPCN. Areas included in such a certificateCPCN that are subsequently annexed to municipalities may continue to be served by the holder of the certificate,CPCN, irrespective of whether it has a franchise in the annexing municipality. On the other hand, the holder of the municipal franchise may not extend service into such newly annexed area without authorization by the Mississippi PSC.
Generally, the traditional electric operating companies have experienced, and expect to continue to experience, competition in their respective retail service territories in varying degrees from the development and deployment of alternative energy sources such as self-generation (as described below) and distributed generation technologies, as well as other factors.
Southern Power competes with investor-owned utilities, IPPs, and others for wholesale energy sales primarily in the Southeasternacross various U.S. wholesale market.utility markets. The needs of this marketthese markets are driven by the demands of end users in the Southeast and the generation available. Southern Power's success in wholesale energy sales is influenced by various factors including reliability and availability of Southern Power's plants, availability of transmission to serve the demand, price, and Southern Power's ability to contain costs.
As of December 31, 2016,2019, Alabama Power had cogeneration contracts in effect with ninesix industrial customers. Under the terms of these contracts, Alabama Power purchases excess energy generated by such companies. During 2016,2019, Alabama Power purchased approximately 78123 million KWHs from such companies at a cost of $2$3 million.
As of December 31, 2016,2019, Georgia Power had contracts in effect with 29to purchase generation from 33 small power producers whereby Georgia Power purchases their excess generation.IPPs. During 2016,2019, Georgia Power purchased 1.22.7 billion KWHs from such companies at a cost of $88$176 million. Georgia Power also has PPAs for electricity with six cogeneration facilities. Payments are subject to reductions for failure to meet minimum capacity output. During 2016,2019, Georgia Power purchased 512390 million KWHs at a cost of $38$31 million from these facilities.
Also during 2016, Georgia Power purchased energy from three customer-owned generating facilities. These customers provide only energy to Georgia Power, make no capacity commitment, and are not dispatched by Georgia Power. During 2016, Georgia Power purchased a total of 46 million KWHs from the three customers at a cost of approximately $2 million.
As of December 31, 2016, Gulf Power had agreements in effect with various industrial, commercial, and qualifying facilities pursuant to which Gulf Power purchases "as available" energy from customer-owned generation. During 2016, Gulf Power purchased 228 million KWHs from such companies for approximately $6 million.
As of December 31, 2016,2019, Mississippi Power had onea cogeneration agreement in effect with one of its industrial customers. Under the terms of this contract, Mississippi Power purchases any excess generation. During 2016,2019, Mississippi Power did not purchasemake any excess generation from this customer.such purchases.

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Natural Gas
Southern Company Gas' regulated natural gas distribution utilities do not compete with other distributors of natural gas in their exclusive franchise territories but face competition from other energy products. Their principal competitors are electric utilities and fuel oil and propane providers serving the residential, commercial, and industrial markets in their service areas for customers who are considering switching to or from a natural gas appliance.
Competition for heating as well as general household and small commercial energy needs generally occurs at the initial installation phase when the customer or builder makes decisions as to which types of equipment to install. Customers generally use the chosen energy source for the life of the equipment.
Customer demand for natural gas could be affected by numerous factors, including:
changes in the availability or price of natural gas and other forms of energy;
general economic conditions;
energy conservation, including state-supported energy efficiency programs;
legislation and regulations;
the cost and capability to convert from natural gas to alternative energy products; and
technological changes resulting in displacement or replacement of natural gas appliances.
Southern Company Gas continues to develop and grow its business through the use of a variety of targeted marketing programs designed to attract new customers and to retain existing customers. These efforts include working to add residential customers, multifamily complexes, and commercial customers who might use natural gas, as well as evaluating and launching new natural gas related programs, products, and services to enhance customer growth, mitigate customer attrition, and increase operating revenues.
The natural gas-related programs generally emphasize natural gas as the fuel of choice for customers and seek to expand the use of natural gas through a variety of promotional activities. In addition, Southern Company Gas partners with third-party entities to market the benefits of natural gas appliances.
Recent advances in natural gas drilling in shale producing regions of the U.S. have resulted in historically high supplies of natural gas and relatively low prices for natural gas. The availability and affordability of natural gas have provided cost advantages and further opportunity for growth of the businesses.
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Seasonality
The demand for electric power and natural gas supply is affected by seasonal differences in the weather. While the electric power sales of some electric utilities peak in the summer, others peak in the winter. In most of the areasaggregate, during normal weather conditions, the traditional electric operating companies serve,Southern Company system's electric power sales peak during both the summer while inand winter. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. As a result, the overall operating results of Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasRegistrants in the future may fluctuate substantially on a seasonal basis. In addition, Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants have historically sold less power and natural gas when weather conditions are milder.
Regulation
State CommissionsStates
The traditional electric operating companies and the natural gas distribution utilities are subject to the jurisdiction of their respective state PSCs or applicable state regulatory agencies. These regulatory bodies have broad powers of supervision and regulation over public utilities operating in the respective states, including their rates, service regulations, sales of securities (except for the Mississippi PSC), and, in the cases of the Georgia PSC and the Mississippi PSC, in part, retail service territories. See "Territory"Territory Served by the Southern Company System"System" and "Rate Matters""Rate Matters" herein for additional information.
Federal Power Act
The traditional electric operating companies, Southern Power Company and certain of its generation subsidiaries, and SEGCO are all public utilities engaged in wholesale sales of energy in interstate commerce and, therefore, are subject to the rate, financial, and accounting jurisdiction of the FERC under the Federal Power Act. The FERC must approve certain financings and allows an "at cost standard" for services rendered by system service companies such as SCS and Southern Nuclear. The FERC is also authorized to establish regional reliability organizations which enforce reliability standards, address impediments to the construction of transmission, and prohibit manipulative energy trading practices.
Alabama Power and Georgia Power are also subject to the provisions of the Federal Power Act or the earlier Federal Water Power Act applicable to licensees with respect to their hydroelectric developments. As of December 31, 2016,2019, among the hydroelectric projects subject to licensing by the FERC are 14 existing Alabama Power generating stations having an aggregate

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installed capacity of 1,670,000 KWs and 17 existing Georgia Power generating stations and one generating station partially owned by Georgia Power, with a combined aggregate installed capacity of 1,087,2961,101,402 KWs.
In 2013, the FERC issued a new 30-year license to Alabama Power for Alabama Power's seven hydroelectric developments on the Coosa River (Weiss, Henry, Logan Martin, Lay, Mitchell, Jordan, and Bouldin). Alabama Power filed a petition requesting rehearing of the FERC order granting the relicense seeking revisions to several conditions of the license. Alabama Rivers Alliance, American Rivers, the Georgia Environmental Protection Division, and the Atlanta Regional Commission also filed petitions for rehearing of the FERC order. On April 21,In 2016, the FERC issued an order granting in part and denying in part Alabama Power's rehearing request. The order also denied rehearing requests filed byAmerican Rivers and Alabama Rivers Alliance American Rivers, the Georgia Environmental Protection Division, and the Atlanta Regional Commission. On May 17, 2016, Alabama Rivers Alliance and American Rivers filed a second rehearing request and on June 15, 2016, also filed a petitionmultiple appeals of the FERC's 2013 order for review atthe new 30-year license and, in July 2018, the U.S. Court of Appeals for the District of Columbia Circuit vacated the order and remanded the proceeding to the FERC. Alabama Power continues to operate the Coosa River developments under annual licenses issued by the FERC. The ultimate outcome of the license and the rehearing denial order.The FERC issued an order on September 12, 2016 denying the second rehearing request, and American Rivers and Alabama Rivers Alliance subsequently filed an appeal of that orderthis matter cannot be determined at the U.S. Court of Appeals for the District of Columbia Circuit. The U.S. Court of Appeals for the District of Columbia Circuit has consolidated the two appeals into one proceeding.this time.
In 2013,2019, Alabama Power filed an application with the FERC to relicense the Holt hydroelectric project located on the Warrior River. The current Holt license expired on August 31, 2015. Since the FERC did not act on Alabama Power's new license application prior to expiration, the FERC issued to Alabama Power an annual license authorizing continued operation of the project under the terms and conditions of the expired license until action is taken on the new license and, on December 22, 2016, issued a new 50-year license to Alabama Power.
In December 2015, the FERC issued a new 30-year license to Alabama Power for the Martin Dam project located on the Tallapoosa River. Alabama Rivers Alliance, American Rivers, the Georgia Environmental Protection Division, and the Atlanta Regional Commission filed petitions for rehearing of the FERC order, which the FERC denied on November 15, 2016.
In 2016, Georgia Power continued the process of developing an application to relicense the Harris Dam project on the Tallapoosa River, which is expected to be filed with the FERC by November 30, 2021. The current Harris Dam project license will expire on November 30, 2023.
In May 2018, Georgia Power filed an application to relicense the Wallace Dam project on the Oconee River. The current Wallace Dam project license will expire on June 1, 2020. In July 2018, Georgia Power filed a Notice of Intent to relicense the Lloyd Shoals project on the Ocmulgee River. The application to relicense the Lloyd Shoals project is expected to be filed with the FERC by December 31, 2021. The current Lloyd Shoals project license will expire on December 31, 2023. In December 2018, Georgia Power filed applications to surrender the Langdale and Riverview hydroelectric projects on the Chattahoochee River upon their license expirations on December 31, 2023. Both projects together represent 1,520 KWs of Georgia Power's hydro fleet capacity.
Georgia Power and OPC also have a license, expiring in 2027,2026, for the Rocky Mountain Plant,project, a pure pumped storage facility of 847,800903,000 KW installed capacity. See PROPERTIES – "Jointly-Owned Facilities""Jointly-Owned Facilities" in Item 2 herein for additional information.
Licenses for all projects, excluding those discussed above, expire in the years 2023-20402034-2066 in the case of Alabama Power's projects and in the years 2024-20442035-2044 in the case of Georgia Power's projects.
Upon or after the expiration of each license, the U.S. Government, by act of Congress, may take over the project or the FERC may relicense the project either to the original licensee or to a new licensee. In the event of takeover or relicensing to another, the original licensee is to be compensated in accordance with the provisions of the Federal Power Act, such compensation to
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reflect the net investment of the licensee in the project, not in excess of the fair value of the property, plus reasonable damages to other property of the licensee resulting from the severance therefrom of the property. The FERC may grant relicenses subject to certain requirements that could result in additional costs.
The ultimate outcome of these matters cannot be determined at this time.
Nuclear Regulation
Alabama Power, Georgia Power, and Southern Nuclear are subject to regulation by the NRC. The NRC is responsible for licensing and regulating nuclear facilities and materials and for conducting research in support of the licensing and regulatory process, as mandated by the Atomic Energy Act of 1954, as amended; the Energy Reorganization Act of 1974, as amended; and the Nuclear Nonproliferation Act of 1978, as amended; and in accordance with the National Environmental Policy Act of 1969, as amended, and other applicable statutes. These responsibilities also include protecting public health and safety, protecting the environment, protecting and safeguarding nuclear materials and nuclear power plants in the interest of national security, and assuring conformity with antitrust laws.
The NRC licenses for Georgia Power's Plant Hatch Units 1 and 2 expire in 2034 and 2038, respectively. The NRC licenses for Alabama Power's Plant Farley Units 1 and 2 expire in 2037 and 2041, respectively. The NRC licenses for Plant Vogtle Units 1 and 2 expire in 2047 and 2049, respectively.
In 2012, the NRC issued combined construction and operating licenses (COLs) for Plant Vogtle Units 3 and 4. Receipt of the COLs allowed full construction to begin. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters"Construction ProgramsNuclear Construction" of Construction" in Item 7 herein and Note 2 to the financial statements under "Georgia PowerNuclear Construction" in Item 8 herein for additional information.
See Notes 3 and 6 to the financial statements under "Nuclear Insurance" and "Nuclear Decommissioning," respectively, in Item 8 herein for information on nuclear insurance and nuclear decommissioning costs.
Environmental Laws and Regulations
See "Construction Programs" herein, MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein, and Note 3 to the financial statements of Southern Company under "Regulatory Matters – Georgia Power – Nuclear Construction""Environmental Remediation" and Georgia Power under "Retail Regulatory Matters – Nuclear Construction" in Item 8 herein for additional information.

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See Notes 1 and 9Note 6 to the financial statements of Southern Company, Alabama Power, and Georgia Power in Item 8 herein for information on nuclear decommissioning costs and nuclear insurance.
Environmental Statutes and Regulations
The Southern Company system's electric utilities' operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Included are laws and regulations regarding the handling and disposal of waste and release of hazardous substances from certain current and former operating sites, and locations affected by historical operations or subject to contractual obligations. Compliance with these existing environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions or through market-based contracts. There is no assurance, however, that all such costs will be recovered. For Southern Company Gas, substantially all of these costs are related to former manufactured gas plants (MGP) sites, which are primarily recovered through existing ratemaking provisions. See Note 3 to the financial statements of Southern Company Gas under "Environmental Matters" in Item 8 herein for additional information.
Compliance with federal environmental statutes and resulting regulations has been, and will continue to be, a significant focus for Southern Company, each traditional electric operating company, Southern Power, SEGCO, and Southern Company Gas. In addition, existingconcerning environmental laws and regulations may be changed or new laws and regulations may be adopted or otherwise become applicable toimpacting the Southern Company system, including laws and regulations designed to address air and water quality, wastes, greenhouse gases, endangered species or other environmental and health concerns. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of Southern Company and each of the traditional electric operating companies in Item 7 herein for additional information about environmental issues, including, but not limited to, proposed and final regulations related to air quality, water quality, CCRs, and global climate issues. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of Southern Power in Item 7 herein for additional information about environmental issues and global climate issues. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of Southern Company Gas in Item 7 herein for additional information about environmental remediation liabilities.Registrants.
The Southern Company system's ultimate environmental compliance strategy, including potential electric generating unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations; the time periods over which compliance with regulations is required; individual state implementation of regulations, as applicable; the outcome of any legal challenges to the environmental rules; any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology; the fuel mix of the electric utilities; and environmental remediation requirements. Compliance costs may arise from existing unit retirements, installation of additional environmental controls, upgrades to the transmission system, closure and monitoring of CCR facilities, and adding or changing fuel sources for certain existing units. Environmental compliance spending over the next several years may differ materially from the amounts estimated. Such expenditures could affect results of operations, cash flows, and financial condition if such costs are not recovered on a timely basis through regulated rates for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power. Further, higher costs that are recovered through regulated rates could contribute to reduced demand for energy, which could negatively affect results of operations, cash flows, and financial condition. Also see MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" of Southern Company, each of the traditional electric operating companies, Southern Power, and Southern Company Gas in Item 7 herein for additional information. The ultimate outcome of these matters cannot be determined at this time.
Compliance with any new federal or state legislation or regulations relating to air, water, and land resources or other environmental and health concerns could significantly affect the Southern Company system. Although new or revised environmental legislation or regulations could affect many areas of the electric utilities' and natural gas distribution utilities' operations, the full impact of any such changes cannot be determined at this time. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity and natural gas. See "Construction Program" herein for additional information.

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Rate Matters
Rate Structure and Cost Recovery Plans
Electric
The rates and service regulations of the traditional electric operating companies are uniform for each class of service throughout their respective retail service territories. Rates for residential electric service are generally of the block type based upon KWHs used and include minimum charges. Residential and other rates contain separate customer charges. Rates for commercial service are presently of the block type and, for large customers, the billing demand is generally used to determine capacity and minimum bill charges. These large customers' rates are generally based upon usage by the customer and include rates with special features to encourage off-peak usage. Additionally, Alabama Power Gulf Power, and Mississippi Power are generally allowed by their respective state PSCs to negotiate the terms and cost of service to large customers. Such terms and cost of service, however, are subject to final state PSC approval.
The traditional electric operating companies recover their respectivecertain costs through a variety of forward-looking, cost-based rate mechanisms. Fuel and net purchased energy costs are recovered through specific fuel cost recovery provisions. These fuel cost recovery provisions are adjusted to reflect increases or decreases in such costs as needed or on schedules as required by the respective PSCs. Approved environmental compliance, storm damage, and certain other costs are recovered at Alabama Power, Gulf Power and Mississippi Power through specific cost recovery mechanisms approved by their respective PSCs. Certain similar costs at Georgia Power are recovered through various base rate tariffs as approved by the Georgia PSC. Costs not recovered through specific cost recovery mechanisms are recovered at Alabama Power and Mississippi Power through annual, formulaic cost recovery proceedings and at Georgia Power and Gulf Power through periodic base rate proceedings.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters" of Southern Company and each of the traditional electric operating companies"Regulatory Matters" in Item 7 herein and Note 32 to the financial statements of Southern Company and each of the traditional electric operating companies under "Retail Regulatory Matters" in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms. Also, see Note 1 to the financial statements of Southern Company and each of the traditional electric operating companies in Item 8"Integrated Resource Planning" herein for a discussionadditional information.
Table of recovery of fuel costs, storm damage costs, and environmental compliance costs through rate mechanisms.ContentsIndex to Financial Statements
See "Integrated Resource Planning" herein for a discussion of Georgia PSC certification of new demand-side or supply-side resources and decertification of existing supply-side resources for Georgia Power. In addition, see MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" of Georgia Power in Item 7 herein and Note 3 to the financial statements of Southern Company under "Regulatory Matters – Georgia Power – Nuclear Construction" and Georgia Power under "Retail Regulatory Matters – Nuclear Construction" in Item 8 herein for a discussion of the Georgia Nuclear Energy Financing Act and the Georgia PSC certification of Plant Vogtle Units 3 and 4, which have allowed Georgia Power to recover financing costs for construction of Plant Vogtle Units 3 and 4 during the construction period beginning in 2011.
See Note 3 to the financial statements of Southern Company and Mississippi Power under "Integrated Coal Gasification Combined Cycle" in Item 8 herein and MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs" of Mississippi Power in Item 7 herein for information on cost recovery plans with respect to the Kemper IGCC.
The traditional electric operating companies and Southern Power Company and certain of its generation subsidiaries are authorized by the FERC to sell power to non-affiliates, including short-term opportunity sales, at market-based prices. Specific FERC approval must be obtained with respect to a market-based contract with an affiliate. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "FERC Matters" of each of the registrants in Item 7 herein for information on the traditional electric operating companies' and Southern Power Company's market-based rate authority and a pending FERC proceeding relating to this authority.
Through 2015, long-term non-affiliate capacity sales from Gulf Power's ownership of Plant Scherer Unit 3 (205 MWs) provided the majority of Gulf Power's wholesale earnings. Contract expirations at the end of 2015 and the end of May 2016 related to Plant Scherer Unit 3 wholesale services had a material negative impact on Gulf Power's earnings in 2016 but did not have a material impact on Southern Company's earnings in 2016. Remaining contract sales from Plant Scherer Unit 3 cover approximately 24% of Gulf Power's ownership of the unit through 2019. On October 12, 2016, Gulf Power filed a petition (2016 Rate Case) with the Florida PSC requesting an annual increase in retail rates and charges of $106.8 million based on the projected test year of January 1, 2017 through December 31, 2017 and a retail return on equity (ROE) of 11% compared to the current retail ROE of 10.25%. The requested increase includes recovery of the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers following the contract expirations discussed above. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, Gulf Power may consider an asset sale. The current book

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value of Gulf Power's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. The Florida PSC is expected to make a decision on the 2016 Rate Case in the second quarter 2017. Gulf Power has requested that the increase in base rates, if approved by the Florida PSC, become effective in July 2017. On November 2, 2016, the Florida PSC approved Gulf Power's 2017 annual cost recovery clause factors. The fuel and environmental factors include certain costs associated with the ongoing ownership and operation of Plant Scherer Unit 3. The final disposition of these costs, and the related impact on rates, is subject to the Florida PSC's ultimate ruling on whether costs associated with Plant Scherer Unit 3 are recoverable from retail customers, which is expected to be decided by the Florida PSC in the 2016 Rate Case.
Mississippi Power serves long-term contracts with rural electric cooperative associations and a municipalitymunicipalities located in southeastern Mississippi under cost-based electric tariffs, which are subject to regulation by the FERC. The contracts with these wholesale customers represented 19.8%15.7% of Mississippi Power's total operating revenues in 20162019 and are largelygenerally subject to 10-year rolling 10-year cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Natural Gas
Southern Company Gas' seven natural gas distribution utilities are subject to regulationsregulation and oversight by their respective state regulatory agencies with respect to rates charged to their customers, maintenance of accounting records, and various service and safety matters.agencies. Rates charged to these customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide Southern Company Gaseach natural gas distribution utility the opportunity to generate revenues to recover all prudently incurredprudently-incurred costs, including a return on rate base sufficient to pay interest on debt, and provide a reasonable return. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
With the exception of Atlanta Gas Light, Company, which operates in a deregulated environment in which gas marketersMarketers rather than a traditional utility sell natural gas to end-use customers and earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas.
The natural gas distribution utilities, excluding Atlanta Gas Light, Company, are authorized to use natural gas cost recovery mechanisms that allow them to adjust their rates to reflect changes in the wholesale cost of natural gas and to ensure they recoverrecovery of all of the costs prudently incurred in purchasing natural gas for their customers. In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities have other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans.
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Regulatory Matters – Utility Regulation and Rate Design" of Southern Company GasGas" in Item 7 herein and Note 32 to the financial statements of Southernunder "Southern Company Gas under "Regulatory Matters"Gas" in Item 8 herein for a discussion of rate matters and certain cost recovery mechanisms.
Integrated Resource Planning
Each of the traditional electric operating companies continually evaluates its electric generating resources in order to ensure that it maintains a cost-effective and reliable mix of resources to meet the existing and future demand requirements of its customers. See "Environmental Statutes and Regulations" aboveMANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters" in Item 7 herein for a discussion of existing and potential environmental regulations that may impact the future generating resource needs of the traditional electric operating companies.
CertainAlabama Power
Triennially, Alabama Power provides an IRP report to the Alabama PSC. This report overviews Alabama Power's resource planning process and contains information that serves as the foundation for certain decisions affecting Alabama Power's portfolio of supply-side and demand-side resources. The IRP report facilitates Alabama Power's ability to provide reliable and cost-effective electric service to customers, while accounting for the traditional electric operating companies are requiredrisks and uncertainties inherent in planning for resources sufficient to file IRPs with their respective statemeet expected customer demand. Under State of Alabama law, a CCN must be obtained from the Alabama PSC as discussed below.before Alabama Power constructs any new generating facility, unless such construction is deemed an ordinary extension in the usual course of business. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" in Item 8 herein for additional information.
Georgia Power
Triennially, Georgia Power must file an IRP with the Georgia PSC that specifies how it intends to meet the future electricalelectric service needs of its customers through a combination of demand-side and supply-side resources. The Georgia PSC, under state law, must certify any new demand-side or supply-side resources for Georgia Power to receive cost recovery. Once certified, the lesser of actual or certified construction costs and purchased power costs is recoverable through rates. Certified costs may be excluded from recovery only on the basis of fraud, concealment, failure to disclose a material fact, imprudence, or criminal misconduct.
See Note 32 to the financial statements of Southern Company under "Regulatory Matters – "Georgia Power – Rate Plans" "– and " – Integrated Resource Plan." Also see Note 2 under and "– Nuclear Construction" and Note 3 to the financial statements of "Georgia Power under "Retail

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Regulatory MattersRate Plans," "– Integrated Resource Plan," and "– Nuclear Construction"Construction" in Item 8 herein for additional information.information on the Georgia Nuclear Energy Financing Act and the Georgia PSC certification of Plant Vogtle Units 3 and 4, which allow Georgia Power to recover certain financing costs for construction of Plant Vogtle Units 3 and 4.
Gulf
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Mississippi Power
Annually by April 1, GulfIn November 2019, the Mississippi PSC established the Integrated Resource Planning and Reporting Rule (IRP Rule), which is intended to allow electric utilities the flexibility to formulate long-term plans to best meet the needs of their customers through a combination of demand-side and supply-side resources and considering transmission needs. The IRP Rule establishes reporting requirements that include the filing of an IRP on a three-year cycle, with supply-side updates midway through the three-year cycle, and an annual report on energy delivery improvements. The IRP filing is not intended to supplant or replace the Mississippi PSC's existing regulatory processes for petition and approval of CCNs for new generating resources. Mississippi Power mustwill file a 10-year site planits first triennial IRP in compliance with the FloridaIRP Rule in April 2021.
In February 2018, the Mississippi PSC containing Gulf Power's estimate of its power-generating needs inapproved a settlement agreement related to cost recovery for the period and the general location of its proposed power plant sites. The 10-year site plans submitted by the state's electric utilities are reviewed by the Florida PSC and subsequently classified as either "suitable" or "unsuitable." The Florida PSC then reports its findings along with any suggested revisionsKemper County energy facility, pursuant to the Florida Department of Environmental Protection for its consideration at any subsequent electrical power plant site certification proceedings. Under Florida law, any 10-year site plans submitted by an electric utility are considered tentative information for planning purposes only and may be amended at any time at the discretion of the utility with written notification to the Florida PSC.
Gulf Power's most recent 10-year site plan was classified by the Florida PSC as "suitable" in November 2016. Gulf Power's most recent 10-year site plan and environmental compliance plan identify environmental regulations and potential legislation or regulation that would impose mandatory restrictions on greenhouse gas emissions. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Air Quality," "– Environmental Statutes and Regulations – Coal Combustion Residuals," and "– Global Climate Issues" of Gulf Power in Item 7 herein. Gulf Power continues to evaluate the economics of various potential planning scenarios for units at certain Gulf Power coal-fired generating plants as EPA and other regulations develop.
As a result of the cost to comply with environmental regulations imposed by the EPA, Gulf Power retired its coal-fired generation at Plant Smith Units 1 and 2 (357 MWs) on March 31, 2016. Gulfwhich Mississippi Power filed a petition with the Florida PSC requesting permission to recover the remaining net book value of Plant Smith Units 1 and 2 and the remaining materials and supplies associated with these units as of the retirement date. OnReserve Margin Plan (RMP) in August 29, 2016, the Florida PSC approved Gulf Power's request to reclassify these costs, totaling approximately $63 million, to a regulatory asset for recovery over a period to be decided in the 2016 Rate Case.2018, which it updated on December 31, 2019. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
Mississippi Power's 2010 IRP indicated that Mississippi Power plans to construct the Kemper IGCC to meet its identified needs, to add environmental controls at Plant Daniel Units 1 and For additional information, see Note 2 to defer environmental controls at Plant Watson Units 4 and 5, and to continue operation of the combined cycle Plant Daniel Units 3 and 4. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Air Quality" and "– Global Climate Issues" of Mississippi Power in Item 7 herein. In 2014, Mississippi Power entered into a settlement agreement with the Sierra Club that, among other things, required the Sierra Club to dismiss or withdraw all pending legal and regulatory challenges to the Kemper IGCC and the flue gas desulfurization system project at Plant Daniel Units 1 and 2, which also occurred in 2014. In addition, and consistent with Mississippi Power's ongoing evaluation of recent environmental rules and regulations, Mississippi Power agreed to retire, repower with natural gas, or convert to an alternative non-fossil fuel source Plant Sweatt Units 1 and 2 (80 MWs) no later than December 2018 (and the units were retired in July 2016). Mississippi Power also agreed that it would cease burning coal or other solid fuel at Plant Watson Units 4 and 5 (750 MWs) and begin operating those units solely on natural gas no later than April 2015 (which occurred in April 2015) and cease burning coal and other solid fuel at Plant Greene County Units 1 and 2 (200 MWs) no later than April 2016 (which occurred in February and March 2016, respectively), and begin operating those units solely on natural gas (which occurred in June and July 2016, respectively).
For information regarding Mississippi Power's construction of the Kemper IGCC, see MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle" of Mississippi Power in Item 7 herein and Note 3 to the financial statements of Southern Company and under "Mississippi Power under "Integrated Coal Gasification Combined Cycle"Reserve Margin Plan" in Item 8 herein.
The ultimate outcome of these matters cannot be determined at this time.

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Employee Relations
The Southern Company system had a total of 32,01527,943 employees on its payroll at December 31, 2016.2019.
 
Employees at
December 31, 20162019
Alabama Power6,8056,324

Georgia Power7,5276,938
Gulf Power1,352

Mississippi Power1,4841,030

PowerSecure1,051910

SCS4,3413,697

Southern Company Gas5,2924,446

Southern Nuclear3,9283,940

Southern Power*Power0460

Other235198

Total32,01527,943
*Southern Power has no employees. Southern Power has agreements with SCS and the traditional electric operating companies whereby employee services are rendered at amounts in compliance with FERC regulations.
The traditional electric operating companies and the natural gas distribution utilities have separate agreements with local unions of the IBEW and the Utilities Workers Union of America generally covering wages, working conditions, and procedures for handling grievances and arbitration. These agreements apply with certain exceptions to operating, maintenance, and construction employees.
Alabama Power has agreements with the IBEW in effect through August 15, 2019.14, 2025. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
Georgia Power has an agreement with the IBEW covering wages and working conditions, which is in effect through June 30, 2021.
Gulf Power has an agreement with the IBEW covering wages and working conditions, which is in effect through April 15, 2019. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
Mississippi Power has an agreement with the IBEW covering wages and working conditions, which is in effect through May 1, 2019. In 2013, Mississippi Power signed a separate agreement with the IBEW related solely to the Kemper IGCC; the current agreement is in effect through March 15, 2021.2024.
Southern Nuclear has a five-year agreement with the IBEW covering certain employees at Plants Hatch and Plant Vogtle Units 1 and 2, which is in effect through June 30, 2021. A five-year agreement between Southern Nuclear and the IBEW representing certain employees at Plant Farley is in effect through August 15, 2019.2024. Upon notice given at least 60 days prior to that date, negotiations may be initiated with respect to agreement terms to be effective after such date.
The agreements also make the terms of the pension plans for the companies discussed above subject to collective bargaining with the unions at either a five-year or a 10-year cycle, depending upon union and company actions.
The natural gas distribution utilities have separate agreements with different local unions of the IBEW and Utilities Workers Union of America covering wages, benefits, working conditions, and procedures for handling grievances and arbitration. Nicor Gas' agreement with the IBEW is effective through February 28, 2018.29, 2020 and negotiations on a new agreement commenced on January 9, 2020. Virginia Natural Gas, Inc.'sGas' agreement with the IBEW is effective through May 16, 2019. Elizabethtown Gas' agreement with15, 2020. Notice has been given to Virginia Natural Gas by the Utility Workers UnionIBEW of America is effective through November 20, 2019. The agreements also make the terms of the Southern Company Gas pension plan subjecttheir intent to collective bargaining with the unions when significantnegotiate changes to the benefit accrualsagreement prior to the expiration date. A new IBEW local union was certified at Atlanta Gas Light in April 2018 and negotiations for a new agreement are considered by Southern Company Gas.ongoing.


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Item 1A. RISK FACTORS
In addition to the other information in this Form 10-K, includingMANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL in Item 7, ofeach registrant, and other documents filed by Southern Company and/or itssubsidiaries with the SEC from time to time, the following factors should becarefully considered in evaluating Southern Company and its subsidiaries. Suchfactors could affect actual results and cause results to differ materially fromthose expressed in any forward-looking statements made by, or on behalf of, SouthernCompany and/or its subsidiaries.
UTILITY REGULATORY, LEGISLATIVE, AND LITIGATION RISKS
Southern Company and its subsidiaries are subject to substantial federal, state, and local governmentalregulation.regulation, including with respect to rates. Compliance with current and future regulatory requirements andprocurement of necessary approvals, permits, and certificates may result insubstantial costs to Southern Company and its subsidiaries.
Laws and regulations govern the terms and conditions of the services the Southern Company system offers, protection of critical electric infrastructure assets, transmission planning, reliability, pipeline safety, interaction with wholesale markets, and its subsidiaries, including the traditional electric operating companies, Southern Power, and Southern Company Gas,relationships with affiliates, among other matters. The Registrants' businesses are subject to regulatory regimes which could result in substantial regulation from federal, state, and local regulatory agencies. Southern Company and its subsidiaries are requiredmonetary penalties if a Registrant is found to comply with numerous laws and regulations and to obtain numerous permits, approvals, and certificates from the governmental agencies that regulate various aspects of their businesses, including rates and charges, service regulations, retail service territories, sales of securities, sales and marketing of energy-related products and services, incurrence of indebtedness, asset acquisitions and sales, accounting and tax policies and practices, physical and cyber security policies and practices, and the construction and operation of electric generating facilities, as well as transmission, storage, transportation, and distribution facilities for the electric and natural gas businesses. For example, the respective state PSC or other applicable state regulatory agency must approve the traditional electric operating companies' requested rates for retail electric customers and the natural gas distribution utilities' requested rates for gas distribution operations customers. be noncompliant.
The traditional electric operating companies and the natural gas distribution utilities seek to recover their costs, including compliance costs (including a reasonable return on invested capital), through their retail rates, and awhich must be approved by the applicable state PSC or other applicable state regulatory agency,agency. Such regulators, in a future rate proceeding, may alter the timing or amount of certain costs for which recovery is allowed or modify the current authorized rate of return. Rate refunds may also be required. Additionally, the rates charged to wholesale customers by the traditional electric operating companies and by Southern Power and the rates charged to natural gas transportation customers by Southern Company Gas' pipeline investments and for some of its storage assets must be approved by the FERC. These wholesale rates could be affected by changes to Southern Power's and the traditional electric operating companies' ability to conduct business pursuant to FERC market-based rate authority. The
A small percentage of transmission revenues are collected through wholesale electric tariffs but the majority are collected through retail rates. FERC rules relatedpertaining to retainingregional transmission planning and cost allocation, which are intended to spur the authoritydevelopment of new transmission infrastructure to sell electricity at market-based ratespromote the integration of renewable resources as well as facilitate competition in the wholesale markets are important for the traditional electric operating companiesmarket by providing more choices to wholesale customers, present challenges to transmission planning and Southern Power if they are to remain competitive in the wholesale markets in which they operate.market structure.
The impact of any future revision or changes in interpretations of existing regulations or the adoption of new laws and regulations applicable to Southern Company or any of its subsidiaries is uncertain. Changes in regulation, or the imposition of additional regulations, changes in enforcement practices of regulators, or penalties imposed for noncompliance with existing laws or regulations could influence the operating environment of Southern Company and its subsidiaries and may result in substantial costs or otherwise negatively affect their results of operations.
The Southern Company system's costs of compliance with environmental laws and satisfying related AROs are significant. The costs of compliance with currentsignificant and future environmental laws, including laws and regulations designed to address air quality, greenhouse gases (GHG), water quality, waste, and other matters and the incurrence of environmental liabilities could negatively impact the net income, cash flows, and financial condition of Southern Company, the traditional electric operating companies, Southern Power, and/or Southern Company Gas.Registrants.
The Southern Company system is subject to extensive federal,system's operations are regulated by state and localfederal environmental agencies through a variety of laws and regulations governing air, water, land, and other natural resources. Compliance with existing environmental requirements involves significant capital and operating costs including the settlement of AROs, a major portion of which among other things, regulate air emissions, GHG, water usageis expected to be recovered through retail and discharge, release of hazardous substances, and the management and disposal of waste in order to adequately protect the environment. Compliance with these environmental requirements requires the traditional electric operating companies, Southern Power, and Southern Company Gas to commit significant expenditures, including installation and operation of pollution control equipment, environmental monitoring, emissions fees, remediationwholesale rates. There is no assurance, however, that all such costs and/or permits at substantially all of their respective facilities. Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gaswill be recovered. The Registrants expect that thesefuture compliance expenditures will continue to be significant in the future.significant.
The EPA has adopted and is in the process of implementing regulations governing air and water quality including the emission of nitrogen oxide, sulfur dioxide, fine particulate matter, ozone, mercury, and other air pollutants under the Clean Air Act and water quality under the Clean Water Act, including regulations governing cooling water intake structures and effluent guidelines for steam electric generating plants under the Clean Water Act.plants. The EPA has also finalizedadopted regulations governing the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments at active generating power generation plants. The EPA has also finalized regulations, whichcost estimates for AROs related to the disposal of CCR are currently stayed bybased on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the U.S. Supreme Court, limiting CO2 emissions from fossil fuel-firedpotential methods for complying with the CCR Rule. The traditional electric generating units.

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periodically update their ARO cost estimates.
Additionally, environmental laws and regulations covering the handling and disposal of waste and release of hazardous substances could require the Southern Company system to incur substantial costs to clean up affected sites, including certain current and former operating sites, and locations affected by historical operations or subject to contractual obligations.
Existing environmental laws and regulations may be revised or new laws and regulations related to air quality, GHG, water quality, waste, endangered species, or other environmental and health concerns may be adopted or become applicable to the traditional electric operating companies, Southern Power, and/or Southern Company Gas.
Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages
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alleged to have been caused by CO2 and other emissions, CCR, releases of regulated substances, and alleged exposure to regulated substances, and/or requests for injunctive relief in connection with such matters.
Compliance with any new or revised environmental laws or regulations could affect many areas of operations for the Southern Company system. The Southern Company system's ultimate environmental compliance strategy including potential unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations; the time periods over which compliance with regulations is required; individualdepend on various factors, such as state adoption and implementation of regulations, as applicable;requirements, the availability and cost of any deployed control technology, fuel prices, and the outcome of anypending and/or future legal challenges to the environmental rules and any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology and costs; and the fuel mix of the electric utilities.challenges. Compliance costs may ariseresult from existing unit retirements,the installation of additional environmental controls, upgrades to the transmission system, closure and groundwater monitoring of CCR facilities, and addingunit retirements, or changing fuel sources for certain existing units.
units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. Environmental compliance spending over the next several years may differ materially from the amounts estimated. Such expendituresestimated and could affect unit retirement and replacement decisions and results of operations, cash flows, andand/or financial condition if such costs are notcannot continue to be recovered on a timely basis through regulated rates for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power.basis. Further, higherincreased costs that are recovered through regulated rates could contribute to reduced demand for energy,electricity and natural gas, which could negatively affect results of operations, cash flows, andand/or financial condition. Additionally, if Southern Company, any traditional electric operating company, Southern Power,many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to affect their demand for electricity or Southern Company Gas fails to comply with environmental laws and regulations, even if caused by factors beyond its control, that failure may result in the assessment of civil or criminal penalties and fines and/or remediation costs.natural gas.
The Southern Company system may be exposed to regulatory and financial risks related to the impact of climate changeGHG legislation, regulation, and regulation.
Since the late 1990s, the U.S. Congress, the EPA, federal courts, and various states have considered, and at times have adopted, climate change policies and proposals to reduce GHG emissions, mandate renewable energy, and/or impose energy efficiency standards.  Clean Air Act regulation and/or future GHG or renewable energy legislation requiring limits or reductions in emissions could cause the Southern Company system to incur expenditures and make fundamental business changes to achieve limits and reduce GHG emissions. Internationally, the United Nations Framework Convention on Climate Change, which the United States has ratified, considers addressing climate change.  The 21st Conference of the Parties met in late 2015 and resulted in the adoption of the Paris Agreement, which established a non-binding universal framework for addressing GHG emissions based on nationally determined contributions.
In October 2015, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing COemissions from new, modified, and reconstructed units. The other final action, known as the Clean Power Plan, establishes guidelines for states to develop plans to meet EPA-mandated COemission rates for existing units. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022 and 2029 and final rates in 2030 and thereafter. The proposed guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions. On February 9, 2016, the U.S. Supreme Court granted a stay of the Clean Power Plan, pending disposition of petitions for its review with the courts. The stay will remain in effect through the resolution of the litigation, whether resolved in the U.S. Court of Appeals for the District of Columbia Circuit or the U.S. Supreme Court.reduction goals.
Costs associated with these actionsGHG legislation, regulation, and emission reduction goals could be significantsignificant. Additional GHG policies, including legislation, may emerge in the future requiring the United States to the utility industry and the Southern Company system.transition to a lower GHG emitting economy. However, the ultimate financial and operational impact of the final rules on the Southern Company system cannot be determined at this time and will depend upon numerouson various factors, includingsuch as state adoption and implementation of requirements, low natural gas prices, the Southern Company system's ongoing reviewdevelopment, deployment, and advancement of relevant energy technologies, the final rules;ability to recover costs through existing ratemaking provisions, and the outcome of pending and/or future legal challenges, including legal challenges filed by the traditional electric operating companies; individual state implementation of the EPA's final guidelines, including the potential that state plans impose different standards; additional rulemaking activities in response to legal challenges and related court decisions; the impact of future changes in electric

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generation and emissions-related technology and costs; the impact of future decisions regarding unit retirement and replacement, including the type and amount of any such replacement generation capacity; and the time periods over which compliance will be required.challenges.
Because natural gas is a fossil fuel with lower carbon content relative to other traditionalfossil fuels, future GHG constraints, including, but not limited to, the imposition of a carbon constraintstax, may create additional demand for natural gas, both for production of electricity and direct use in homes and businesses. The impact is already being seen in the power production sector dueFuture GHG constraints designed to both environmental regulations and low natural gas costs.  Future regulation of methane, a GHG and primary constituent ofminimize emissions from natural gas could likewise result in increased costs to the Southern Company system and affect the demand for natural gas as well as the prices charged to customers and the competitive position of natural gas.
The net income ofIn April 2018, Southern Company the traditional electric operating companies, and Southern Power could be negatively impacted by changes in regulations related to transmission planning processes and competition in the wholesale electric markets.
The traditional electric operating companies currently own and operate transmission facilities as partestablished an intermediate goal of a vertically integrated utility. A small percentage50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of transmission revenues are collected through the wholesale electric tariff but the majority of transmission revenues are collected through retail rates. FERC rules pertaininglow- to regional transmission planning and cost allocation present challenges to transmission planning and the wholesale market structure in the Southeast.no-carbon operations by 2050. The key impacts of these rules include:
possible disruption of the integrated resource planning processes within the states in the Southern Company system's service territory;
delaysability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas prices, and additional processes for developing transmission plans; and
possible impacts on state jurisdiction of approving, certifying, and pricing new transmission facilities.
The FERC rules related to transmission are intended to spur the development, deployment, and advancement of new transmission infrastructure to promote and encourage the integration of renewable sources of supply as well as facilitate competition in the wholesale market by providing more choices to wholesale power customers. In addition to the impacts on transactions contemplating physical delivery ofrelevant energy financial laws and regulations also impact power hedging and trading based on futures contracts and derivatives that are traded on various commodities exchanges as well as over-the-counter. Finally, technology changes in the power and fuel industries continue to create significant impacts to wholesale transaction cost structures.technologies. The impact of these and other such developments and the effect of changes in levels of wholesale supply and demand is uncertain. The financial condition, net income, and cash flows of Southern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the traditional electric operating companies,use of natural gas for generation, completing Plant Vogtle Units 3 and Southern Power could be adversely affected by these4, investing in energy efficiency, and other changes.
continuing research and development efforts focused on technologies to lower GHG emissions. The traditional electric operating companies and Southern Power could be subject to higher costs as a result of implementing and maintaining compliance with the North American Electric Reliability Corporation mandatory reliability standards along with possible associated penalties for non-compliance.
Owners and operators of bulk power systems, including the traditional electric operating companies, are subject to mandatory reliability standards enacted by the North American Electric Reliability Corporation and enforced by the FERC. Compliance with or changes in the mandatory reliability standards may subject the traditional electric operating companies and Southern Power to higher operating costs and/or increased capital expenditures. If any traditional electric operating company or Southern Power is found to be in noncompliance with the mandatory reliability standards, such traditional electric operating company or Southern Power could be subject to sanctions, including substantial monetary penalties.
Southern Company system is also evaluating methods of removing carbon from the traditional electric operating companies, Southern Power, and Southern Company Gas may be materially impacted by potential tax reform legislation.atmosphere.
Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction.  The ultimate impact of any tax reform proposals, including potential changes to the availability or realizability of investment tax credits and PTCs, is dependent upon the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on the financial statements of Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas.See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Environmental Matters – Global Climate Issues" in Item 7 herein for additional information.

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OPERATIONAL RISKS
The financial performance of Southern Company and its subsidiaries may be adverselyaffected if the subsidiaries are unable to successfully operate their facilities or perform certain corporate functions.
The financial performance of Southern Company and its subsidiaries depends on the successful operation of the electric utilities' generating,generation, transmission, and distribution facilities, and Southern Company Gas' natural gas distribution and storage facilities, and distributed generation storage technologies and the successful performance of necessary corporate functions. There are many risks that could affect these operations and performance of corporate functions, including:
including operator error or failure of equipment or processes;
processes, accidents, or explosions;
operating limitations that may be imposed by environmental or other regulatory requirements;
requirements or in connection with joint owner arrangements, labor disputes;
terroristdisputes, physical attacks, (physical and/or cyber);
fuel or material supply interruptions;
interruptions and/or shortages, transmission disruption or capacity constraints, including with respect to the Southern Company system's and third parties' transmission, storage, and transportation facilities, and third party transmission, storage, and transportation facilities;
compliance with mandatory reliability standards, including mandatory cyber security standards;
standards, implementation of new technologies;
technologies, information technology (IT) system failure;
failures, cyber intrusion;
anintrusions, environmental event,events, such as a spillspills or release;releases, and
catastrophic events such as fires, earthquakes, explosions, floods, droughts,tornadoes, hurricanes and other storms, droughts, pandemic health events, such as influenzas, or other similar occurrences.
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A decrease or elimination of revenues from the electric generation, transmission, or distribution facilities or natural gas distribution or storage facilities or an increase in the cost of operating the facilities would reduce the net income and cash flows and could adversely impact the financial condition of the affected traditional electric operating company, Southern Power, or Southern Company Gas and of Southern Company.Registrant.
Operation of nuclear facilities involves inherent risks, including environmental,safety, health, regulatory, natural disasters, terrorism,cyber intrusions or physical attacks, and financial risks, that could result in fines or theclosure of the nuclear units owned by Alabama Power or Georgia Powerand which may present potential exposures in excess of insurance coverage.
Alabama Power owns, and contracts for the operation of, two nuclear units and Georgia Power holds undivided interests in, and contracts for the operation of, four existing nuclear units. The six existing units are operated by Southern Nuclear and representrepresented approximately 3,680 MWs, or 8%, of the Southern Company system's electric generation capacity as of December 31, 2016. In addition, these units generated approximately 23%25% and 24%26% of the total KWHs generated by Alabama Power and Georgia Power, respectively, in the year ended December 31, 2016.2019. In addition, Southern Nuclear, on behalf of Georgia Power and the other co-owners,Vogtle Owners, is overseeingmanaging the construction of Plant Vogtle Units 3 and 4. Due solely to the increase in nuclear generating capacity, the below risks are expected to increase incrementally once Plant Vogtle Units 3 and 4 are operational. Nuclear facilities are subject to environmental, safety, health, operational, and financial risks such as:
the potential harmful effects on the environment and human health and safety resulting from a release of radioactive materials in connection with the operation of nuclear facilities and the storage, handling, and disposal of radioactive material, including spent nuclear fuel;materials;
uncertainties with respect to the ability to dispose of spent nuclear fuel and the need for longer term on-site storage;
uncertainties with respect to the technological and financial aspects of decommissioning nuclear plants at the end of licensed lives and the ability to maintain and anticipate adequate capital reserves for decommissioning;
limitations on the amounts and types of insurance commercially available to cover losses that might arise in connection with theany nuclear operations of Alabama Poweroperations; and Georgia Power or those of other commercial nuclear facility owners in the U.S.;
potential liabilities arising out of the operation of these facilities;
significant capital expenditures relating to maintenance, operation, security, and repair of these facilities, including repairs and upgrades required by the NRC;facilities.
the threat of a possible terrorist attack, including a potential cyber security attack; and
the potential impact of an accident or natural disaster.
It is possible that damages,Damages, decommissioning, or other costs could exceed the amount of decommissioning trusts or external insurance coverage, including statutorily required nuclear incident insurance.

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The NRC has broad authority under federal law to impose licensing and safety-related requirements for the operation of nuclear generation facilities. In the event of non-compliance, with NRC licensing and safety-related requirements, the NRC has the authority to impose fines and/or shut down any unit, depending upon its assessment of the severity of the situation, until compliance is achieved. NRC orders or regulations related to increased security measures and any future NRC safety requirements promulgated by the NRC could require Alabama Power and Georgia Power to make substantial operating and capital expenditures at their nuclear plants. In addition, if a serious nuclear incident were to occur, it could result in substantial costs to Alabama Power or Georgia Power and Southern Company. A major incident at a nuclear facility anywhere in the world could cause the NRC to delay or prohibit construction of new nuclear units or require additional safety measures at new and existing units. Moreover, a major incident at any nuclear facility in the U.S., including facilities owned and operated by third parties, could require Alabama Power and Georgia Power to make material contributory payments.
In addition, actual or potential terrorist threats and increased public scrutiny of utilitiescyber intrusions or physical attacks could result in increased nuclear licensing or compliance costs that are difficult to predict.
Transporting and storing natural gas involves risks that may result in accidents and other operating risks and costs.
Southern Company Gas' natural gas distribution and storage activities involve a variety of inherent hazards and operating risks, such as leaks, accidents, explosions, and mechanical problems, which could result in serious injury, to employees and non-employees, loss of human life, significant damage to property, environmental pollution, and impairment of its operations. The location of pipelines and storage facilities near populated areas could increase the level of damage resulting from these risks. Additionally, these pipeline and storage facilities are subject to various state and other regulatory requirements. Failure to comply with these requirements could result in substantial monetary penalties or potential early retirement of storage facilities, which could trigger an associated impairment. The occurrence of any of these events not fully covered by insurance or otherwise could adversely affect Southern Company Gas' and Southern Company's financial condition and results of operations.
Physical or cyber attacks, both threatened and actual, could impact the ability of the traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants to operate and could adversely affect financial results and liquidity.
The traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants face the risk of physical and cyber attacks, both threatened and actual, against their respective generation and storage facilities and the transmission and distribution infrastructure used to transport energy, and their information technology systems and network infrastructure, which could negatively impact thetheir ability of the traditional electric operating companies or Southern Power to generate, transport, and deliver power, or otherwise operate their respective facilities, or, the ability ofwith respect to Southern Company Gas, its ability to distribute or store natural gas, or otherwise operate its facilities, in the most efficient manner or at all. In addition, physical or cyber attacks against key suppliers or servicethird-party providers could have a similar effect on the Southern Company and its subsidiaries.system.
The traditional electric operating companies, Southern Power, and Southern Company Gas operate in highly regulated industries that require the continued operation of sophisticated information technology systems and network infrastructure, which are part of interconnected distribution systems. In addition, in the ordinary course of business, the traditional electric operating companies, Southern Power, and Southern Company Gas collect and retain sensitive information, including personal identification information about customers, employees, and stockholders, and other confidential information. In some cases, administration of certain functions is outsourced to service providers that could be targets of cyber attacks. The traditional electric operating companies, Southern Power, and Southern Company Gas face on-going threats to their assets. Despite the implementation of robust security measures, all assets are potentially vulnerable to disability, failures, or unauthorized access due to human error, natural disasters, technological failure, or internal or external physical or cyber attacks. If the traditional electric operating companies', Southern Power's, or Southern Company Gas' assets
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were to fail, be physically damaged, or be breached and were not recoveredrestored in a timely way,manner, the traditional electric operating companies, Southern Power, or Southern Company Gasaffected Subsidiary Registrant may be unable to fulfill critical business functions. Moreover, the amount and scope of insurance maintained against losses resulting from any such events or physical security breaches may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result.
These events could harm the reputation of and negatively affect the financial results of the Registrants through lost revenues and costs to repair damage, if such costs cannot be recovered.
An information security incident, including a cybersecurity breach, or the failure of one or more key IT systems, networks, or processes could impact the ability of the Registrants to operate and could adversely affect financial results and liquidity.
Information security risks have generally increased in recent years as a result of the proliferation of new technology and increased sophistication and frequency of cyber attacks and data security breaches. The Subsidiary Registrants operate in highly regulated industries that require the continued operation of sophisticated IT systems and network infrastructure, which are part of interconnected distribution systems. Because of the critical nature of the infrastructure, increased connectivity to the internet, and technology systems' inherent vulnerability to disability or failures due to hacking, viruses, acts of war or terrorism, or other types of data security breaches, the Southern Company system faces a heightened risk of cyberattack. Parties that wish to disrupt the U.S. bulk power system or Southern Company system operations could view these computer systems, software, or networks as targets. The Registrants and their third-party vendors have been subject, and will likely continue to be subject, to attempts to gain unauthorized access to their IT systems and confidential data or to attempts to disrupt utility operations. As a result, Southern Company and its subsidiaries face on-going threats to their assets, including assets deemed critical infrastructure, where databases and systems have been, and will likely continue to be, subject to advanced computer viruses or other malicious codes, unauthorized access attempts, phishing, and other cyber attacks. While there have been immaterial incidents of phishing and attempted financial fraud across the Southern Company system, there has been no material impact on business or operations from these attacks. However, the Registrants cannot guarantee that security efforts will prevent breaches, operational incidents, or other breakdowns of IT systems and network infrastructure and cannot provide any assurance that such incidents will not have a material adverse effect in the future.
In addition, in the ordinary course of business, Southern Company and its subsidiaries collect and retain sensitive information, including personally identifiable information about customers, employees, and stockholders, and other confidential information. In some cases, administration of certain functions may be outsourced to third-party service providers that could also be targets of cyber attacks.
Despite the implementation of robust security measures, all assets are potentially vulnerable to internal or external cyber attacks, which may inhibit the affected Registrant's ability to fulfill critical business functions and compromise sensitive and other data could be compromised.data. Any physical security breach, cyber breach or theft, damage, or improper disclosure of sensitive electronic data may also subject the applicable traditional electric operating company, Southern Power, or Southern Company Gasaffected Registrant to penalties and claims from regulators or other third parties. Moreover, the amount and scope of insurance may not be sufficient to cover losses or otherwise adequately compensate for any disruptions to business that could result. In addition, as cybercriminals become more sophisticated, the cost of proactive defensive measures may increase.
These events could harm the reputation of and negatively affect the financial results of Southern Company, the traditional electric operating companies, Southern Power, or Southern Company GasRegistrants through lost revenues, costs to recover and repair damage, and costs associated with governmental actions in response to such attacks.attacks, and litigation costs if such costs cannot be recovered through insurance or otherwise.
The Southern Company system may not be able to obtainadequate natural gas, fuel supplies, and other fuel suppliesresources required to operate the traditional electric operating companies' and Southern Power's electric generating plants or serve Southern Company Gas' natural gas customers.
The traditional electric operating companies and Southern Power purchase fuel including coal, natural gas, uranium, fuel oil, and biomass, as applicable, from a number of suppliers. The traditional electric operating companies and Southern Power also need adequate access to water, which is drawn from nearby sources, to aid in the production of electricity and, once it is used, returned to its source. Disruption in the delivery of fuel, including disruptions as a result of, among other things, transportation delays, weather, labor relations, force majeure events, or environmental regulations affecting

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any of these fuel suppliers,water, could limit the ability of the traditional electric operating companies and Southern Power to operate certain facilities, which could result in higher fuel and operating costs and potentially reduce the net income of the affected traditional electric operating company or Southern Power and Southern Company.
Southern Company Gas' primary business is the distribution and sale of natural gas through its regulated and unregulated subsidiaries. Natural gas supplies can be subject to disruption in the event production or distribution is curtailed, such as in the event of a hurricane or a pipeline failure. The Southern Company Gassystem also relies on natural gas pipelines and other storage and transportation facilities owned and operated by third parties to deliver natural gas to wholesale markets and to Southern Company Gas'its distribution
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systems. The availability of shale gas and potential regulations affecting its accessibility may have a material impact on the supply and cost of natural gas. Disruption in natural gas supplies could limit the ability to fulfill these contractual obligations.
The traditional electric operating companies and Southern Power have become more dependent on natural gas for a portionmajority of their electric generating capacity.capacity and expect to continue to increase such dependence. In many instances, the cost of purchased power for the traditional electric operating companies and Southern Power is influenced by natural gas prices. Historically, natural gas prices have been more volatile than prices of other fuels. In recent years, domestic natural gas prices have been depressed by robust supplies, including production from shale gas. These market conditions, together with additional regulation of coal-fired generating units, have increased the traditional electric operating companies' reliance on natural gas-fired generating units.
The traditional electric operating companies are also dependent on coal for a portion of their electric generating capacity. The traditional electric operating companies depend on coal supply contracts, and the counterparties to these agreements may not fulfill their obligations to supply coal to the traditional electric operating companies. The suppliers under these agreements may experiencebecause of financial or technical problems that inhibit their ability to fulfill their obligations to the traditional electric operating companies.problems. In addition, the suppliers under these agreements may not be required to supply coal to the traditional electric operating companies under certain circumstances, such as in the event of a natural disaster. If the traditional electric operating companies are unable to obtain their contracted coal requirements, under these contracts, the traditional electric operating companiesthey may be required to purchase their coal requirements at higher prices, which may not be recoverable through rates.
The revenues of Southern Company, the traditional electric operating companies, and SouthernPower depend inpart on sales under PPAs. The failure of a PPA counterparty to one of these PPAs toperform its obligations, the failure of the traditional electric operating companies ora Southern PowerCompany subsidiary to satisfy minimum requirements under the PPAs, or the failure to renew the PPAs or successfully remarket the related generating capacity could have a negativeimpact on the net income and cash flows of the affected traditional electric operating companyor Southern Power andand/or of Southern Company.
Most of Southern Power's generating capacity has been sold to purchasers under PPAs. Southern Power's top three customers, Georgia Power, Duke Energy Corporation,Southern California Edison, and San Diego Gas & ElectricMorgan Stanley Capital Group accounted for 16.5%9.0%, 7.8%6.8%, and 5.7%4.9%, respectively, of Southern Power's total revenues for the year ended December 31, 2016. In addition, the2019. The traditional electric operating companies enterhave entered into PPAs with non-affiliated parties. Revenues
The revenues related to PPAs are dependent on the continued performance by the purchasers of their obligations under these PPAs.obligations. The failure of one of the purchasersa purchaser to perform its obligations, including as a result of a general default or bankruptcy, could have a negative impact on the net income and cash flows of the affected traditional electric operating company or Southern Power and of Southern Company. Although the credit evaluations undertaken and contractual protections implemented by Southern Power and the traditional electric operating companies take into account the possibility of default by a purchaser, actual exposure to a default by a purchaser may be greater than predicted or specified in the applicable contract. See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in Item 8 herein for additional information on the potential impacts of Pacific Gas & Electric Company's bankruptcy filing.
Additionally, neither Southern Power nor any traditional electric operating company can predict whether the PPAs will be renewed at the end of their respective terms or on what terms any renewals may be made. As an example, Gulf Power had long-term sales contracts to cover 100% of its ownership share of Plant Scherer Unit 3 (205 MWs) and these capacity revenues represented 82% of Gulf Power's total wholesale capacity revenues for 2015. Following contract expirations at the end of 2015 and the end of May 2016, Gulf Power's remaining contracted sales from the unit cover approximately 24% of Gulf Power's ownership of the unit through 2019. The expiration of these contracts had a material negative impact on Gulf Power's earnings in 2016 and may continue to have a material negative impact in future years. In addition, the failure of the traditional electric operating companies ora Southern PowerCompany subsidiary to satisfy minimum operational or availability requirements under these PPAs, including PPAs related to fuel cell technology, could result in payment of damages or termination of the PPAs.
The asset management arrangements between Southern Company Gas' wholesale gas services and Southern Company Gas' regulated operating companies, and between Southern Company Gas' wholesaleits customers, including the natural gas services and its non-affiliated customers,distribution utilities, may not be renewed or may be renewed at lower levels, which could have a significant impact on Southern Company Gas' financial results.
Southern Company Gas' wholesale gas services currently manages the storage and transportation assets of Atlanta Gas Lightthe natural gas distribution utilities (except Nicor Gas) as well as certain non-affiliated customers. Southern Company Virginia Natural Gas, Inc., Elizabethtown Gas, Florida City Gas, Chattanooga Gas Company, and Elkton Gas. TheGas' wholesale gas services has a concentration of credit risk for services it provides to its counterparties, which is generally concentrated in 20 of its counterparties.

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The profits earned from the management of these affiliate assets are shared with the respective affiliate's customers (and for Atlanta Gas Light Company with the Georgia PSC's Universal Service Fund), except for Chattanooga Gas Company and Elkton Gas where wholesale gas services are provided under annual fixed-fee agreements. These asset management agreements are subject to regulatory approval and such agreements may not be renewed or may be renewed with less favorable terms.
The financial results of Southern Company Gas' wholesale gas services also has asset management agreements with certain non-affiliated customers and its financial results could be significantly impacted if theseany of its agreements with its affiliated or non-affiliated customers are not renewed or are amended or renewed with less favorable terms. Sustained low natural gas prices could reduce the demand for these types of asset management arrangements.
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Increased competition from other companies that supply energy or generation and storage technologies could negatively impact Southern Company's and its subsidiaries' revenues, results of operations, and financial condition.
The energy industry is highly competitive and complex and the Southern Company system faces increasing competition from other companies that supply energy or generation and storage technologies. Changes in technology may make the Southern Company system's electric generating facilities owned by the traditional electric operating companies and Southern Power less competitive. Southern Company Gas' business is dependent on natural gas prices remaining competitive as compared to other forms of energy. Southern Company Gas also faces competition in its unregulated markets.
A key element of the business models of the traditional electric operating companies and Southern Power is that generating power at central station power plants achieves economies of scale and produces power at a competitive cost. There are distributed generation and storage technologies that produce and store power, including fuel cells, microturbines, wind turbines, solar cells, and batteries. Advances in technology or changes in laws or regulations could reduce the cost of thesedistributed generation storage technologies or other alternative methods of producing power to a level that is competitive with that of most central station power electric production or result in smaller-scale, more fuel efficient, and/or more cost effective distributed generation that allows for increased self-generation by customers. Broader use of distributed generation by retail energy customers may also result from customers' changing perceptions of the merits of utilizing existing generation technology or tax or other economic incentives. Additionally, a state PSC or legislature may modify certain aspects of the traditional electric operating companies' business as a result of these advances in technology.
It is also possible that rapid advances in central station power generation technology could reduce the value of the current electric generating facilities owned by the traditional electric operating companies and Southern Power. Changes in technology could also alter the channels through which electric customers buy or utilize power, which could reduce the revenues or increase the expenses of Southern Company, the traditional electric operating companies, or Southern Power.
Southern Company Gas' business is dependent on natural gas prices remaining competitive as compared to other forms of energy. Southern Company Gas' gas marketing services segment also is affected by competition from other energy marketers providing similar services in Southern Company Gas' unregulated service territories, most notably in Illinois and Georgia. Southern Company Gas' wholesale gas services competes for sales with national and regional full-service energy providers, energy merchants and producers, and pipelines based on the ability to aggregate competitively-priced commodities with transportation and storage capacity. Southern Company Gas competes with natural gas facilities in the Gulf Coast region of the U.S., as the majority of the existing and proposed high deliverability salt-dome natural gas storage facilities in North America are located in the Gulf Coast region. Storage values have begun to recover from the declines experienced over the past several years due to low natural gas prices and low volatility and Southern Company Gas expects this trend to continue during the remainder of 2017.
If new technologies become cost competitive and achieve sufficient scale, the market share of the traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants could be eroded, and the value of their respective electric generating facilities or natural gas distribution and storage facilities could be reduced. Additionally, Southern Company Gas' market share could be reduced if Southern Company Gas cannot remain price competitive in its unregulated markets. If state PSCs or other applicable state regulatory agencies fail to adjust rates to reflect the impact of any changes in loads, increasing self-generation, and the growth of distributed generation, the financial condition, results of operations, and cash flows of Southern Company and the affected traditional electric operating company or Southern Company Gas could be materially adversely affected.
Failure to attract and retain an appropriately qualified workforce could negatively impact Southern Company's and its subsidiaries' results of operations.
Events such as an aging workforce without appropriate replacements, mismatch of skill sets to future needs, or unavailability of contract resources may lead to operating challenges such as lack of resources, loss of knowledge, and a lengthy time period associated with skill development, including with the workforce needs associated with major construction projects and ongoing operations. The Southern Company system's costs, including costs for contractors to replace employees, productivity costs, and safety costs, may rise. Failure to hire and adequately obtain replacement employees, including the ability to transfer significant internal historical knowledge and expertise to the new employees, or the future availability and cost of contract labor may adversely affect Southern Company and its subsidiaries' ability to manage and operate their businesses.
As a result of the increased demand for skilled linemen in California and the Northeast, portions of the Southern Company system experienced higher than normal turnover in 2019. The Southern Company system is diligently working to attract and train qualified linemen.
If Southern Company

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and its subsidiaries are unable to successfully attract and retain an appropriately qualified workforce, results of operations could be negatively impacted.
CONSTRUCTION RISKS
Southern Company, the traditional electric operating companies, Southern Power, and/or Southern Company GasThe Registrants have incurred and may incuradditional costs or delays in the construction of new plants or other facilities and may not be able to recover their investments. Also, existing facilities ofthe traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants requireongoing capital expenditures, including those to meet AROs and other environmental standards.standards and goals.
General
The businesses of the registrantsRegistrants require substantial capital expenditures for investments in new facilities and, for the traditional electric operating companies, capital improvements to transmission, distribution, and generation facilities, for Southern Power, capital improvements to generation facilities, and, for Southern Company Gas, capital improvements to natural gas distribution
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and storage facilities, includingfacilities. These expenditures also include those to settle AROs and meet environmental standards. Certain of thestandards and goals. The traditional electric operating companies and Southern Power are in the process of constructing new generating facilities and adding environmental controls equipment atmodifications to certain existing generating facilities. The traditional electric operating companies also are in the process of closing ash ponds to comply with the CCR Rule and, where applicable, state CCR rules. Southern Company Gas is replacing certain pipelines in its natural gas distribution system and is involved in threetwo new gas pipeline construction projects. The Southern Company system intends to continue its strategy of developing and constructing other new electric generating facilities, expanding or updating existing facilities, and addingimproving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental control equipment.laws and regulations. These types of projects are long term in nature and in some cases may include the development and construction of facilities with designs that have not been finalized or previously constructed. The completion of these types of projects without delays or significant cost overruns is subject to substantial risks that have occurred or may occur, including:
shortages, anddelays, increased costs, or inconsistent quality of equipment, materials, and labor;
changes in labor costs and productivity;challenges with management of contractors, subcontractors, or vendors;
work stoppages;
contractor or supplier delay or non-performancedelay;
nonperformance under construction, operating, or other agreements or non-performance by other major participants in construction projects;agreements;
delays in or failure to receive necessary permits, approvals, tax credits, and other regulatory authorizations;
delays associatedchallenges with start-up activities including(including major equipment failure, and system integration, or regional transmission upgrades) and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by any PSC or other applicable state regulatory agency);performance;
operational readiness, including specialized operator training and required site safety programs;
impacts of new and existing laws and regulations, including environmental laws and regulations;
the outcome of any legal challenges to projects, including legal challenges to regulatory approvals;
failure to construct in accordance with permittingpermits and licensing requirements;licenses (including satisfaction of NRC requirements);
failure to satisfy any environmental performance standards and the requirements of tax credits and other incentives;
continued public and policymaker support for such projects;
adverse weather conditions or natural disasters;
other unforeseen engineering or design problems;
changes in project design or scope;and other licensing-based compliance matters;
environmental and geological conditions;
delays or increased costs to interconnect facilities to transmission grids; and
unanticipated cost increases, including materials and labor, and increased financing costs as a result of changes in market interest rates or as a result of construction scheduleproject delays.
If a traditional electric operating company, Southern Power, or Southern Company GasSubsidiary Registrant is unable to complete the development or construction of a project or decides to delay or cancel construction of a project, it may not be able to recover its investment in that project and may incur substantial cancellation payments under equipment purchase orders or construction contracts. Additionally, eachcontracts, as well as other costs associated with the closure and/or abandonment of the construction project.
In addition, partnership and joint ownership agreements may provide partners or co-owners with certain decision-making authority in connection with projects under construction, including rights to cause the cancellation of a construction project under certain circumstances. Any failure by a partner or co-owner to perform its obligations under the applicable agreements could have a material negative impact on the applicable project under construction. Certain Southern Company Gas pipeline construction project involvesdevelopment projects involve separate joint venture participants. participants that own a majority of the project, Southern Power participates in partnership agreements with respect to a majority of its renewable energy projects, Georgia Power jointly owns Plant Vogtle Units 3 and 4 with other co-owners, and Mississippi Power jointly owns Plant Daniel with Gulf Power. See Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information regarding jointly-owned facilities.
If construction projects are not completed according to specification, a Registrant may incur liabilities and suffer reduced plant efficiency, higher operating costs, and reduced net income. Furthermore, construction delays associated with renewable projects could result in the loss of otherwise available tax credits and incentives.
Even if a construction project (including a joint venture construction project) is completed, the total costs may be higher than estimated and the applicable traditional electric operating company or the natural gas distribution utility may not be able to recover such expendituresrecoverable through regulated rates.rates, if applicable. In addition, construction delays and contractor performance shortfalls can result in the loss of revenues and may, in turn, adversely affect the net income and financial position of a traditional electric operating company, Southern Power, orthe affected Registrant. The largest construction project currently underway in the Southern Company Gassystem is Plant Vogtle Units 3 and of4. Southern Company.
Construction delays could result in theCompany and Georgia Power recorded a pre-tax estimated probable loss of otherwise available investment tax credits, PTCs,$1.1 billion ($0.8 billion after tax) in 2018 to reflect Georgia Power's revised estimate to complete construction and other tax incentives. Furthermore, if construction projects are not completed accordingstart-up of Plant Vogtle Units 3 and 4. See Note 2 to specification, a traditional electric operating company, Southernthe financial statements under "Georgia Power or Nuclear Construction" in Item 8 herein for information regarding Plant Vogtle Units 3 and 4. Also see Note 3 to the financial statements under "Other MattersSouthern Company Gas and Southern Company may incur liabilities and suffer reduced plant efficiency, higher operating costs, and reduced net income.

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GasGas Pipeline Projects" for information regarding the construction delays and the associated cost increases for Southern Company Gas' pipeline construction projects and Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding the proposed sale of Southern Company Gas' interests in Atlantic Coast Pipeline.
Once facilities become operational, ongoing capital expenditures are required to maintain reliable levels of operation. Significant portions of the traditional electric operating companies' existing facilities were constructed many years ago. Older equipment, even if maintained in accordance with good engineering practices, may require significant capital expenditures to maintain efficiency, to comply with changing environmental requirements, or to provide safe and reliable operations.
The two largest construction projects currently underway in the Southern Company system are the construction of Plant Vogtle Units 3 and 4 and the Kemper IGCC. In addition, Southern Power has 567 MWs of natural gas and renewable generation under construction at three project sites.
Plant Vogtle Units 3 and 4 construction and rate recovery
Southern Nuclear, on behalf of Georgia Power and the other co-owners, is overseeing the construction of and will operate Plant Vogtle Units 3 and 4 (each, an approximately 1,100 MW AP1000 nuclear generating unit). Georgia Power owns 45.7% of the new units. There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4, at the federal and state level, and additional challenges may arise as construction proceeds.
Under the terms of the engineering, procurement, and construction contract between the Vogtle Owners and the Contractor (Vogtle 3 and 4 Agreement), the Vogtle Owners agreed to pay a purchase price subject to certain price escalations and adjustments, including fixed escalation amounts and index-based adjustments, as well as adjustments for change orders, and performance bonuses for early completion and unit performance. The Vogtle 3 and 4 Agreement also provides for liquidated damages upon the Contractor's failure to fulfill the schedule and performance guarantees, subject to an aggregate cap of 10% of the contract price, or approximately $920 million to $930 million. In addition, the Vogtle 3 and 4 Agreement provides for limited cost sharing by the Vogtle Owners for Contractor costs under certain conditions (which Georgia Power has not been notified have occurred), with maximum additional capital costs under this provision attributable to Georgia Power (based on Georgia Power’s ownership interest) of approximately $114 million. Each Vogtle Owner is severally (and not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to the Contractor under the Vogtle 3 and 4 Agreement. Georgia Power’s proportionate share is 45.7%. In the event of certain credit rating downgrades of any Vogtle Owner, such Vogtle Owner will be required to provide a letter of credit or other credit enhancement.
Certain obligations of Westinghouse have been guaranteed by Toshiba Corporation (Toshiba), Westinghouse's parent company. In the event of certain credit rating downgrades of Toshiba, Westinghouse is required to provide letters of credit or other credit enhancement. In December 2015, Toshiba experienced credit rating downgrades and Westinghouse provided the Vogtle Owners with $920 million of letters of credit. These letters of credit remain in place in accordance with the terms of the Vogtle 3 and 4 Agreement.
On February 14, 2017, Toshiba announced preliminary earnings results for the period ended December 31, 2016, which included a substantial goodwill impairment charge at Westinghouse attributed to increased cost estimates to complete its U.S. nuclear projects, including Plant Vogtle Units 3 and 4. Toshiba also warned that it will likely be in a negative equity position as a result of the charges. At the same time, Toshiba reaffirmed its commitment to its U.S. nuclear projects with implementation of management changes and increased oversight. An inability or failure by the Contractor to perform its obligations under the Vogtle 3 and 4 Agreement could have a material impact on the construction of Plant Vogtle Units 3 and 4.
Under the terms of the Vogtle 3 and 4 Agreement, the Contractor does not have a right to terminate the Vogtle 3 and 4 Agreement for convenience. The Contractor may terminate the Vogtle 3 and 4 Agreement under certain circumstances, including certain Vogtle Owner suspension or delays of work, action by a governmental authority to permanently stop work, certain breaches of the Vogtle 3 and 4 Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. In the event of an abandonment of work by the Contractor, the maximum liability of the Contractor under the Vogtle 3 and 4 Agreement is increased significantly, but remains subject to limitations. The Vogtle Owners may terminate the Vogtle 3 and 4 Agreement at any time for convenience, provided that the Vogtle Owners will be required to pay certain termination costs.
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. On December 20, 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudence matters, including that (i) the in-service capital cost forecast will be adjusted to $5.680 billion (Revised Forecast), which includes a contingency of $240 million above Georgia Power's current forecast of $5.440 billion, (ii) capital costs incurred up to the Revised Forecast will be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, and (iii) Georgia Power would have the burden to show that any capital costs above the Revised Forecast are reasonable and prudent.
Under the terms of the Vogtle Cost Settlement Agreement, the certified in-service capital cost for purposes of calculating Georgia Power's Nuclear Construction Cost Recovery (NCCR) tariff will remain at $4.418 billion. Construction capital costs above $4.418 billion will accrue allowance for funds used during construction (AFUDC) through the date each unit is placed in service. The ROE used to calculate the NCCR tariff was reduced from 10.95% (the ROE rate setting point authorized by the

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Georgia PSC in the Alternative Rate Plan approved by the Georgia PSC for the years 2014 through 2016) to 10.00% effective January 1, 2016. For purposes of the AFUDC calculation, the ROE on costs between $4.418 billion and $5.440 billion will also be 10.00% and the ROE on any amounts above $5.440 billion would be Georgia Power's average cost of long-term debt. If the Georgia PSC adjusts Georgia Power's ROE rate setting point in a rate case prior to Plant Vogtle Units 3 and 4 being placed into retail rate base, then the ROE for purposes of calculating both the NCCR tariff and AFUDC will likewise be 95 basis points lower than the revised ROE rate setting point. If Plant Vogtle Units 3 and 4 are not placed in service by December 31, 2020, then (i) the ROE for purposes of calculating the NCCR tariff will be reduced an additional 300 basis points, or $8 million per month, and may, at the Georgia PSC's discretion, be accrued to be used for the benefit of customers, until such time as the units are placed in service and (ii) the ROE used to calculate AFUDC will be Georgia Power's average cost of long-term debt.
Under the terms of the Vogtle Cost Settlement Agreement, Plant Vogtle Units 3 and 4 will be placed into retail rate base on December 31, 2020 or when placed in service, whichever is later. The Georgia PSC will determine for retail ratemaking purposes the process of transitioning Plant Vogtle Units 3 and 4 from a construction project to an operating plant no later than Georgia Power's base rate case required to be filed by July 1, 2019.
As of December 31, 2016, Georgia Power had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through a loan guarantee agreement between Georgia Power and the DOE and a multi-advance credit facility among Georgia Power, the DOE, and the FFB. See Note 6 to the financial statements of Southern Company and Georgia Power under "DOE Loan Guarantee Borrowings" in Item 8 herein for additional information, including applicable covenants, events of default, and mandatory prepayment events.
Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document for the AP1000 nuclear reactor and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of Inspections, Tests, Analyses, and Acceptance Criteria and the related approvals by the NRC, may arise as construction proceeds, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs either to the Vogtle Owners or the Contractor operations, and/or to both.
In addition to Toshiba's reaffirmation of its commitment, the Contractor provided Georgia Power with revised forecasted in-service dates of December 2019 and September 2020 for Plant Vogtle Units 3 and 4, respectively.  Georgia Power is currently reviewing a preliminary summary schedule supporting these dates that ultimately must be reconciled to a detailed integrated project schedule. As construction continues, the risk remains that challenges with Contractor performance including labor productivity, fabrication, delivery, assembly, and installation of plant systems, structures, and components, or other issues could arise and may further impact project schedule and cost. Georgia Power expects the Contractor to employ mitigation efforts and believes the Contractor is responsible for anymeet related costs under the Vogtle 3 and 4 Agreement. Georgia Power estimates its financing costs for Plant Vogtle Units 3 and 4 to be approximately $30 million per month, with total construction period financing costs of approximately $2.5 billion. Additionally, Georgia Power estimates its owner's costs to be approximately $6 million per month, net of delay liquidated damages.
The revised forecasted in-service dates are within the timeframe contemplated in the Vogtle Cost Settlement Agreement and would enable both units to qualify for PTCs the Internal Revenue Service has allocated to each of Plant Vogtle Units 3 and 4, which require the applicable unit to be placed in service before 2021. The net present value of the PTCs is estimated at approximately $400 million per unit.
Future claims by the Contractor or Georgia Power (on behalf of the Vogtle Owners) could arise throughout construction. These claims may be resolved through formal and informal dispute resolution procedures under the Vogtle 3 and 4 Agreement and, under enhanced dispute resolution procedures, may be resolved through litigation after the completion of nuclear fuel load for both units.
See Note 3 to the financial statements of Southern Company under "Regulatory Matters - Georgia Power - Nuclear Construction" and of Georgia Power under "Retail Regulatory Matters - Nuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
Kemper IGCC construction and rate recovery
Mississippi Power continues to progress toward completing the construction and start-up of the Kemper IGCC, which was approved by the Mississippi PSC in the 2010 certificate of public convenience and necessity (CPCN) proceedings, subject to a construction cost cap of $2.88 billion, net of $245 million of grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2 (Initial DOE Grants) and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, AFUDC, and certain general exceptions, including change of law, force majeure, and beneficial capital

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(which exists when Mississippi Power demonstrates that the purpose and effect of the construction cost increase is to produce efficiencies that will result in a neutral or favorable effect on customers relative to the original proposal for the CPCN) (Cost Cap Exceptions). The current cost estimate for the Kemper IGCC in total is approximately $6.99 billion, which includes approximately $5.64 billion of costs subject to the construction cost cap and is net of the $137 million in additional grants from the DOE received on April 8, 2016 (Additional DOE Grants), which are expected to be used to reduce future rate impacts to customers. Mississippi Power does not intend to seek any rate recovery for any related costs that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. Through December 31, 2016, in the aggregate, Southern Company and Mississippi Power have incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC. The current cost estimate includes costs through March 15, 2017.
In addition to the current construction cost estimate, Mississippi Power is identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap. Any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in Southern Company’s and Mississippi Power’s statements of income and these changes could be material.
The expected completion date of the Kemper IGCC at the time of the Mississippi PSC’s approval in 2010 was May 2014. The combined cycle and the associated common facilities portion of the Kemper IGCC were placed in service in August 2014. The remainder of the plant, including the gasifiers and the gas clean-up facilities, represents first-of-a-kind technology. The initial production of syngas began on July 14, 2016 for gasifier "B" and on September 13, 2016 for gasifier "A." Mississippi Power achieved integrated operation of both gasifiers on January 29, 2017, including the production of electricity from syngas in both combustion turbines. Mississippi Power subsequently completed a brief outage to repair and make modifications to further improve the plant's ability to achieve sustained operations sufficient to support placing the plant in service for customers. Efforts to reach sustained operation of both gasifiers and production of electricity from syngas in both combustion turbines are in process. The plant has produced and captured CO2, and has produced sulfuric acid and ammonia, all of acceptable quality under the related off-take agreements. On February 20, 2017, Mississippi Power determined gasifier "B," which has been producing syngas over 60% of the time since early November 2016, requires an outage to remove ash deposits from its ash removal system. Gasifier "A" and combustion turbine "A" are expected to remain in operation, producing electricity from syngas, as well as producing chemical by-products. As a result, Mississippi Power currently expects the remainder of the Kemper IGCC, including both gasifiers, will be placed in service by mid-March 2017.
Any extension of the in-service date beyond mid-March 2017 is currently estimated to result in additional base costs of approximately $25 million to $35 million per month, which includes maintaining necessary levels of start-up labor, materials, and fuel, as well as operational resources required to execute start-up and commissioning activities. Additional costs may be required for remediation of any further equipment and/or design issues identified. Any extension of the in-service date with respect to the Kemper IGCC beyond mid-March 2017 would also increase costs for the Cost Cap Exceptions, which are not subject to the $2.88 billion cost cap established by the Mississippi PSC. These costs include AFUDC, which is currently estimated to total approximately $16 million per month, as well as carrying costs and operating expenses on Kemper IGCC assets placed in service and consulting and legal fees of approximately $3 million per month. Further cost increases and/or extensions of the expected in-service date may result from factors including, but not limited to, difficulties integrating the systems required for sustained operations, sustaining nitrogen supply, major equipment failure, unforeseen engineering or design problems including any repairs and/or modifications to systems, and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC).
Upon placing the remainder of the plant in service, Mississippi Power will be primarily focused on completing the regulatory cost recovery process. In December 2015, the Mississippi PSC issued an order, based on a stipulation between Mississippi Power and the Mississippi Public Utilities Staff (MPUS), authorizing rates that provide for the recovery of approximately $126 million annually related to Kemper IGCC assets previously placed in service.
On August 17, 2016, the Mississippi PSC established a discovery docket to manage all filings related to Kemper IGCC prudence issues. On October 3, 2016 and November 17, 2016, Mississippi Power made filings in this docket including a review and explanation of differences between the Kemper IGCC project estimate set forth in the 2010 CPCN proceedings and the most recent Kemper IGCC project estimate, as well as comparisons of current cost estimates and current expected plant operational parameters to the estimates presented in the 2010 CPCN proceedings for the first five years after the Kemper IGCC is placed in service. Compared to amounts presented in the 2010 CPCN proceedings, operations and maintenance expenses have increased an average of $105 million annually and maintenance capital has increased an average of $44 million annually for the first full five years of operations for the Kemper IGCC. Additionally, while the current estimated operational availability

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estimates reflect ultimate results similar to those presented in the 2010 CPCN proceedings, the ramp up period for the current estimates reflects a lower starting point and a slower escalation rate.
In the fourth quarter 2016, as a part of the Integrated Resource Plan process, the Southern Company system completed its regular annual updated fuel forecast, the 2017 Annual Fuel Forecast. This updated fuel forecast reflected significantly lower long-term estimated costs for natural gas than were previously projected. As a result of the updated long-term natural gas forecast, as well as the revised operating expense projections reflected in the discovery docket filings, on February 21, 2017, Mississippi Power filed an updated project economic viability analysis of the Kemper IGCC as required under the Mississippi PSC’s April 2012 order confirming authorization of the Kemper IGCC. The project economic viability analysis measures the life cycle economics of the Kemper IGCC compared to feasible alternatives, natural gas combined cycle generating units, under a variety of scenarios and considering fuel, operating and capital costs, and operating characteristics, as well as federal and state taxes and incentives. The reduction in the projected long-term natural gas prices in the 2017 Annual Fuel Forecast and, to a lesser extent, the increase in the estimated Kemper IGCC operating costs, negatively impact the updated project economic viability analysis.
After the remainder of the plant is placed in service, AFUDC equity of approximately $11 million per month will no longer be recorded in income, and Mississippi Power expects to incur approximately $25 million per month in depreciation, taxes, operations and maintenance expenses, interest expense, and regulatory costs in excess of current rates. Mississippi Power expects to file a request for authority from the Mississippi PSC and the FERC to defer all Kemper IGCC costs incurred after the in-service date that cannot be capitalized, are not included in current rates, and are not required to be charged against earnings as a result of the $2.88 billion cost cap until such time as the Mississippi PSC completes its review and includes the resulting allowable costs in rates. In the event that the Mississippi PSC does not grant Mississippi Power’s request for an accounting order, these monthly expenses will be charged to income as incurred and will not be recoverable through rates. The ultimate outcome of this matter cannot now be determined but could have a material impact on Southern Company's and Mississippi Power's result of operations, financial condition, and liquidity.
Mississippi Power is required to file a rate case to address Kemper IGCC cost recovery by June 3, 2017 (2017 Rate Case). Costs incurred through December 31, 2016 totaled $6.73 billion, net of the Initial and Additional DOE Grants. Of this total, $2.76 billion of costs has been recognized through income as a result of the $2.88 billion cost cap, $0.84 billion is included in retail and wholesale rates for the assets in service, and the remainder will be the subject of the 2017 Rate Case to be filed with the Mississippi PSC and expected subsequent wholesale Municipal and Rural Associations rate filing with the FERC. Mississippi Power continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper IGCC. Mississippi Power also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further herein, these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs, net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, Mississippi Power is developing both a traditional rate case requesting full cost recovery of the $3.31 billion (net of $137 million in additional DOE Grants) not currently in rates and a rate mitigation plan that together represent Mississippi Power’s probable filing strategy. Mississippi Power also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both Mississippi Power and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on Southern Company’s and Mississippi Power’s financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, Mississippi Power intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
Mississippi Power has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and Southern Company and Mississippi Power have recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017. Given the variety of potential scenarios and the uncertainty of the outcome of future regulatory proceedings with the Mississippi PSC (and any subsequent related legal challenges), the ultimate

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outcome of these matters cannot now be determined but could result in further charges that could have a material impact on Southern Company’s and Mississippi Power’s results of operations, financial condition, and liquidity.
Southern Company and Mississippi Power are defendants in various lawsuits that allege improper disclosure about the Kemper IGCC. While Southern Company and Mississippi Power believe that these lawsuits are without merit, an adverse outcome could have a material impact on Southern Company’s and Mississippi Power's results of operations, financial condition, and liquidity. In addition, the SEC is conducting a formal investigation of Southern Company and Mississippi Power concerning the estimated costs and expected in-service date of the Kemper IGCC. Southern Company and Mississippi Power believe the investigation is focused primarily on periods subsequent to 2010 and on accounting matters, disclosure controls and procedures, and internal controls over financial reporting associated with the Kemper IGCC.
The ultimate outcome of these matters, including the resolution of legal challenges, determinations of prudency, and the specific manner of recovery of prudently-incurred costs, is subject to further regulatory actions and cannot be determined at this time.
See Note 3 to the financial statements of Southern Company and Mississippi Power under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.retirement obligations.
Southern Company Gas' significant investments in pipelines and pipeline development projects involve financial and execution risks.
Southern Company Gas has made significant investments in existing pipelines and pipeline development projects. Many of the existing pipelines are, and, when completed, many of the pipeline development projects will be, operated by third parties. If one of these agents fails to perform in a proper manner, the value of the investment could decline and Southern Company Gas could lose part or all of theits investment. In addition, from time to time, Southern Company Gas may beis required to contribute additionalfulfill capital obligations to a pipeline joint ventureventures or, as necessary, guarantee the obligations of such joint venture.
With respect to certain pipeline development projects, Southern Company Gas will rely on its joint venture partners for construction management and will not exercise direct control over the process. All of the pipeline development projects are dependent on contractors for the successful and timely completion of the projects. Further, the development of pipeline projects involves numerous regulatory, environmental, construction, safety, political, and legal uncertainties and may require the expenditure of significant amounts of capital. These projects may not be completed on schedule, at the budgeted cost, or at all. There may be cost overruns and construction difficulties that cause Southern Company Gas' capital expenditures to exceed its initial expectations.expectations, which may impact the earnings of the joint venture partnerships. Moreover, Southern Company Gas' revenuesincome will not increase immediately upon the expenditure of funds on a pipeline project. Pipeline construction occurs over an extended period of time and Southern Company Gas will not receive material increases in revenuesincome until the project is placed in service.
The occurrenceAt December 31, 2019, Southern Company Gas was involved in two gas pipeline development projects, the Atlantic Coast Pipeline project and the PennEast Pipeline project. See Note 3 to the financial statements under "Other Matters – Southern Company Gas – Gas Pipeline Projects" in Item 8 herein for information regarding these projects and Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of any ofPivotal LNG and Atlantic Coast Pipeline" in Item 8 herein for information regarding the foregoing events could adversely affect the results of operations, cash flows, and financial conditionproposed sale of Southern Company Gas and Southern Company.Gas' interests in Atlantic Coast Pipeline.
FINANCIAL, ECONOMIC, AND MARKET RISKS
The electric generation and energy marketing operations of the traditional electric operating companies and Southern Power and the natural gas operations of Southern Company Gas are subject to risks, many of which are beyondtheir control, including changes in energy prices and fuel costs, which may reduce Southern Company's, the traditional electric operating companies', Southern Power's, and/or Southern Company Gas' revenues and increase costs.
The generation, energy marketing, and natural gas operations of the Southern Company system are subject to changes in energy prices and fuel costs, which could increase the cost of producing power, decrease the amount received from the sale of energy, and/or make electric generating facilities less competitive. The market prices for these commodities may fluctuate significantly over relatively short periods of time. Among the factors that could influence energy prices and fuel costs are:
prevailing market prices for coal, natural gas, uranium, fuel oil, biomass, and other fuels, as applicable, used in the generation facilities of the traditional electric operating companies and Southern Power and, in the case of natural gas, distributed by Southern Company Gas, including associated transportation costs, and supplies of such commodities;
demand for energy and the extent of additional supplies of energy available from current or new competitors;
liquidity in the general wholesale electricity and natural gas markets;
weather conditions impacting demand for electricity and natural gas;
seasonality;
transmission or transportation constraints, disruptions, or inefficiencies;
availability of competitively priced alternative energy sources;
forced or unscheduled plant outages for the Southern Company system, its competitors, or third party providers;
the financial condition of market participants;

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the economy in the Southern Company system's service territory, the nation, and worldwide, including the impact of economic conditions on demand for electricity and the demand for fuels, including natural gas;
natural disasters, wars, embargos, acts of terrorism,physical or cyber attacks, and other catastrophic events; and
federal, state, and foreign energy and environmental regulation and legislation.
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These factors could increase the expenses and/or reduce the revenues of the traditional electric operating companies, Southern Power, or Southern Company Gas and Southern Company.Registrants. For the traditional electric operating companies and Southern Company Gas' regulated gas distribution operations, such increasesimpacts may not be fully recoverable through rates. Other of these factors could reduce the revenues of the traditional electric operating companies, Southern Power, or Southern Company Gas and Southern Company.
Historically, the traditional electric operating companies and Southern Company Gas from time to time have experienced underrecovered fuel and/or purchased gas cost balances and may experience such balances in the future. While the traditional electric operating companies and Southern Company Gas are generally authorized to recover fuel and/or purchased gas costs through cost recovery clauses, recovery may be denied if costs are deemed to be imprudently incurred and there may be delays in the authorization of such recoveryrecovery. These factors could negatively impact the cash flows of the affected traditional electric operating company or Southern Company Gas and of Southern Company.
Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasThe Registrants are subject to risks associated with a changing economic environment, customer behaviors, including increased energy conservation, and adoption patterns of technologies by the customers of the traditional electric operating companies, Southern Power, and Southern Company Gas.Subsidiary Registrants.
The consumption and use of energy are fundamentally linked to economic activity. This relationship is affected over time by changes in the economy, customer behaviors, and technologies. Any economic downturn could negatively impact customer growth and usage per customer, thus reducing the sales of energy and revenues. Additionally, any economic downturn or disruption of financial markets, both nationally and internationally, could negatively affect the financial stability of customers and counterparties of the traditional electric operating companies, Southern Power, and Southern Company Gas.Subsidiary Registrants.
Outside of economic disruptions, changes in customer behaviors in response to energy efficiency programs, changing conditions and preferences, or changes in the adoption of technologies could affect the relationship of economic activity to the consumption of energy. For example, some cities in the United States recently banned the use of natural gas in new construction.
Both federal and state programs exist to influence how customers use energy, and several of the traditional electric operating companies and Southern Company Gas have PSC or other applicable state regulatory agency mandates to promote energy efficiency. Conservation programs could impact the financial results of Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasRegistrants in different ways. For example, if any traditional electric operating company or Southern Company Gas is required to invest in conservation measures that result in reduced sales from effective conservation, regulatory lag in adjusting rates for the impact of these measures could have a negative financial impact on such traditional electric operating company or Southern Company Gas and Southern Company. Customers could also voluntarily reduce their consumption of energy in response to decreases in their disposable income, increases in energy prices, or individual conservation efforts.
In addition, the adoption of technology by customers can have both positive and negative impacts on sales. Many new technologies utilize less energy than in the past. However, new electric and natural gas technologies such as electric and natural gas vehicles can create additional demand. The Southern Company system uses best available methods and experience to incorporate the effects of changes in customer behavior, state and federal programs, PSC or other applicable state regulatory agency mandates, and technology, but the Southern Company system's planning processes may not appropriately estimate and incorporate these effects.
All of the factors discussed above could adversely affect Southern Company's, the traditional electric operating companies', Southern Power's, and/or Southern Company Gas'a Registrant's results of operations, financial condition, and liquidity.
The operating results of Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasRegistrants are affected by weather conditions and may fluctuate on a seasonal andquarterly basis. In addition, significant weathercatastrophic events such as hurricanes, tornadoes, floods, droughts, and winter storms, could result in substantial damage to or limit the operation of the properties of the traditional electric operating companies, Southern Power, and/or Southern Company Gasa Subsidiary Registrant and could negatively impact results of operation, financial condition, and liquidity.
Electric power and natural gas supply are generally seasonal businesses. In many parts of the country, demand for power peaksaggregate, during normal weather conditions, the summer months, with market prices also peaking at that time. In other areas, power demand peaks during the winter months. In most of the areas the traditional electric operating companies serve,Southern Company system's electric power sales peak during both the summer

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Table of ContentsIndex and winter. Additionally, Southern Power has variability in its revenues from renewable generation facilities due to Financial Statements

while inseasonal weather patterns primarily from wind and sun. In most of the areas Southern Company Gas serves, natural gas demand peaks during the winter. As a result, the overall operating results of Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas may fluctuate substantially on a seasonal basis. In addition, the traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants have historically sold less power and natural gas when weather conditions are milder. Unusually mild weather in the future could reduce the revenues, net income, and available cash of Southern Company, the traditional electric operating companies, Southern Power, and/or Southern Company Gas.affected Registrant.
In addition, volatileVolatile or significant weather events could result in substantial damage to the transmission and distribution lines of the traditional electric operating companies, the generating facilities of the traditional electric operating companies and Southern Power, and the natural gas distribution and storage facilities of Southern Company Gas. The traditional electric operating companies, Southern Power, and Southern Company GasSubsidiary Registrants have significant investments in the Atlantic and Gulf Coast regions and Southern Power has wind and natural gasSouthern Company Gas have investments in various states including Maine, Minnesota, Oklahoma, and Texas, which could be subject to severe weather as well as solar investments in various states,and natural disasters, including California, which could be subject to natural disasters.hurricanes and wildfires. Further, severe drought conditions can reduce the availability of water and restrict or prevent the operation of certain generating facilities.
In the event a traditional electric operating company or Southern Company Gas experiences any of these weather events or any natural disaster or other catastrophic event, recovery of costs in excess of reserves and insurance coverage is subject to the
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approval of its state PSC or other applicable state regulatory agency. Historically, the traditional electric operating companies from time to time have experienced deficits in their storm cost recovery reserve balances and may experience such deficits in the future. Any denial by the applicable state PSC or other applicable state regulatory agency or delay in recovery of any portion of such costs could have a material negative impact on a traditional electric operating company's or Southern Company Gas' and on Southern Company's results of operations, financial condition, and liquidity.
In addition, damages resulting from significant weather events within the service territory of any traditional electric operating company or Southern Company Gas or affecting Southern Power's customers may result in the loss of customers and reduced demand for energy for extended periods.periods and may impact customers' ability to perform under existing PPAs. See Note 1 to the financial statements under "RevenuesConcentration of Revenue" in Item 8 herein for additional information on Pacific Gas & Electric Company's bankruptcy filing. Any significant loss of customers or reduction in demand for energy could have a material negative impact on a traditional electric operating company's, Southern Power's, or Southern Company Gas' and Southern Company'sRegistrant's results of operations, financial condition, and liquidity.
Acquisitions, dispositions, or other strategic ventures or investments may not result in anticipated benefits and may present risks not originally contemplated, which may have a material adverse effect on the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
Southern Company and its subsidiaries have made significant acquisitions and investments in the past, as well as dispositions, and may in the future make additional acquisitions, dispositions, or other strategic ventures or investments.investments, including the pending disposition by Southern Company Gas of its interests in Pivotal LNG and Atlantic Coast Pipeline, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries. Southern Company and its subsidiaries continually seek opportunities to create value through various transactions, including acquisitions or sales of assets. Specifically, Southern Power continually seeks opportunities to execute its strategy to create value through various transactions, including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers.
Southern Company and its subsidiaries may face significant competition for transactional opportunities and anticipated transactions may not be completed on acceptable terms or at all. In addition, these transactions are intended to, but may not, result in the generation of cash or income, the realization of savings, the creation of efficiencies, or the reduction of risk. These transactions may also affect the liquidity, results of operations, and financial condition of Southern Company and its subsidiaries.
These transactions also involve risks, including:
they may not result in an increase in income or provide an adequate or expected funds or return on capital or other anticipated benefits;
they may result in Southern Company or its subsidiaries entering into new or additional lines of business, which may have new or different business or operational risks;
they may not be successfully integrated into the acquiring company's operations and/or internal control processes;
the due diligence conducted prior to a transaction may not uncover situations that could result in financial or legal exposure or the acquiring company may not appropriately evaluate the likelihood or quantify the exposure from identified risks;
they may result in decreased earnings, revenues, or cash flow;
they may involve retained obligations in connection with transitional agreements or deferred payments related to dispositions that subject Southern Company or its subsidiaries to additional risk;
Southern Company or the applicable subsidiary may not be able to achieve the expected financial benefits from the use of funds generated by any dispositions;
expected benefits of a transaction may be dependent on the cooperation, performance, or performancecredit risk of a counterparty; or
for the traditional electric operating companies and Southern Company Gas, costs associated with such investments that were expected to be recovered through regulated rates may not be recoverable.

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Table of ContentsIndex to Financial Statements

Southern Company and Southern Company Gas are holding companies and areSouthern Power owns many of its assets indirectly through subsidiaries. Each of these companies is dependent on cash flows from their respective subsidiaries to meet their ongoing and future financial obligations, including making interest and principal payments on outstanding indebtedness and, for Southern Company, to pay dividends on its common stock.
Southern Company and Southern Company Gas are holding companies and, as such, they have no operations of their own. Substantially all of Southern Company's and Southern Company Gas' and many of Southern Power's respective consolidated assets are held by subsidiaries. A significant portion ofSouthern Company's, Southern Company Gas' debt is issued by its 100%-owned subsidiary,and, to a certain extent, Southern Company Gas Capital, and is fully and unconditionally guaranteed by Southern Company Gas. Southern Company's and Southern Company Gas'Power's ability to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and, for Southern Company, to pay dividends on its common stock, is primarily dependent on the net income and cash flows of their
Table of ContentsIndex to Financial Statements

respective subsidiaries and the ability of those subsidiaries to pay upstream dividends or to repay borrowed funds. Prior to funding Southern Company, or Southern Company Gas, or Southern Power, the respective subsidiaries have financial obligations and, with respect to Southern Company and Southern Company Gas, regulatory restrictions and financial obligations that must be satisfied, including among others, debt service and preferred and preference stock dividends. These subsidiaries are separate legal entities and have no obligation to provide Southern Company or Southern Company Gas with funds. In addition, Southern Company, and Southern Company Gas, and Southern Power may provide capital contributions or debt financing to subsidiaries under certain circumstances, which would reduce the funds available to meet their respective financial obligations, including making interest and principal payments on outstanding indebtedness, and to pay dividends on Southern Company's common stock.
A downgrade in the credit ratings of Southern Company, any of the traditional electric operating companies, Southern Power, Southern Company Gas,Registrants, Southern Company Gas Capital, or Nicor Gas could negatively affect their ability to access capital at reasonable costs and/or could require Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, Southern Company Gas Capital, or Nicor Gas to postposting of collateral or replacereplacing certain indebtedness.
There are a number of factors that rating agencies evaluate to arrive at credit ratings for Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas,Registrants, Southern Company Gas Capital, and Nicor Gas, including capital structure, regulatory environment, the ability to cover liquidity requirements, and other commitments for capital. Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas,The Registrants, Southern Company Gas Capital, and Nicor Gas could experience a downgrade in their ratings if any rating agency concludes that the level of business or financial risk of the industry or Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, Southern Company Gas Capital, or Nicor Gasapplicable company has deteriorated. Changes in ratings methodologies by the agencies could also have a negative impact on credit ratings. If one or more rating agencies downgrade Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas,any Registrant, Southern Company Gas Capital, or Nicor Gas borrowing costs likely would increase, including automatic increases in interest rates under applicable term loans and credit facilities, the pool of investors and funding sources would likely decrease, and, particularly for any downgrade to below investment grade, significant collateral requirements may be triggered in a number of contracts. Any credit rating downgrades could require a traditional electric operating company, Southern Power, Southern Company Gas, Southern Company Gas Capital, or Nicor Gas to alteraltering the mix of debt financing currently used, and could require the issuance of secured indebtedness and/or indebtedness with additional restrictive covenants.covenants binding the applicable company.
Uncertainty in demand for energy can result in lower earnings or higher costs. If demand for energy falls short of expectations, it could result in potentially stranded assets. If demand for energy exceeds expectations, it could result in increased costs forpurchasing capacity in the open market or building additional electric generation and transmissionfacilities or natural gas distribution and storage facilities.
Southern Company, the traditional electric operating companies, and Southern Power each engage in a long-term planning process to estimate the optimal mix and timing of new generation assets required to serve future load obligations. Southern Company Gas engages in a long-term planning process to estimate the optimal mix and timing of building new pipelines and storage facilities, replacing existing pipelines, rewatering storage facilities, and entering new markets and/or expanding in existing markets. These planning processes must look many years into the future in order to accommodate the long lead times associated with the permitting and construction of new generation and associated transmission facilities and natural gas distribution and storage facilities. Inherent risk exists in predicting demand this far into the future as these future loads are dependent on many uncertain factors, including economic conditions, customer usage patterns, efficiency programs, and customer technology adoption. Because regulators may not permit the traditional electric operating companies or Southern Company Gas' regulated operating companies to adjust rates to recover the costs of new generation and associated transmission assets and/or new pipelines and related infrastructure in a timely manner or at all, Southern Company and itsthese subsidiaries may not be able to fully recover these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs and the recovery in customers' rates. In addition, under Southern Power's model of selling capacity and energy at negotiated market-based rates under long-term PPAs, Southern Power might not be able to fully execute its business plan if

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market prices drop below original forecasts. Southern Power and/or the traditional electric operating companies may not be able to extend existing PPAs or find new buyers for existing generation assets as existing PPAs expire, or they may be forced to market these assets at prices lower than originally intended. These situations could have negative impacts on net income and cash flows for the affected traditional electric operating company, Southern Power, or Southern Company Gas, and for Southern Company.Registrant.
The traditional electric operating companies are currently obligated to supply power to retail customers and wholesale customers under long-term PPAs. Southern Power is currently obligated to supply power to wholesale customers under long-term PPAs. At peak times, the demand for power required to meet this obligation could exceed the Southern Company system's available generation capacity. Market or competitive forces may require that the traditional electric operating companies or Southern Power purchase capacity on the open market or build additional generation and transmission facilities.facilities and that Southern Power purchase energy or capacity on the open market. Because regulators may not permit the traditional electric operating companies to pass all of these purchase or construction costs on to their customers, the traditional electric operating companies may not be able to recover some or all of these costs or may have exposure to regulatory lag associated with the time between the incurrence of costs of purchased or constructed capacity and the traditional electric operating companies' recovery in customers' rates. Under Southern Power's long-term fixed price PPAs, Southern Power wouldmay not have the abilitybe able to recover anyall of these costs. These situations could have negative impacts on net income and cash flows for the affected traditional electric operating company or Southern Power, and for Southern Company.Registrant.

The businesses of Southern Company, the traditional electric operating companies, SouthernPower, Southern Company Gas,Registrants, SEGCO, and Nicor Gas are dependent on their ability to successfully access funds through capital markets and financial institutions. Theinability of Southern Company, any traditional electric operating company, Southern Power, Southern Company Gas,of the Registrants, SEGCO, or Nicor Gas to access funds may limit its ability to execute its business plan by impacting its ability to fund capital investments or acquisitions that Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, or Nicor Gasit may otherwise rely on to achieve future earnings and cash flows.
Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas,The Registrants, SEGCO, and Nicor Gas rely on access to both short-term money markets and longer-term capital markets as a significant source of liquidity for capital requirements not satisfied by the cash flow from their respective operations. If Southern Company, any traditional electric operating company, Southern Power, Southern Company Gas,of the Registrants, SEGCO, or Nicor Gas is not able to access capital at competitive rates or on favorable terms, its ability to implement its business plan will be limited by impacting its ability to fund capital investments or acquisitions that Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, or Nicor Gasit may otherwise rely on to achieve future earnings and cash flows. In addition, Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas,Registrants, SEGCO, and Nicor Gas rely on committed bank lending agreements as back-up liquidity which allows them to access low cost money markets. Each of Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas,Registrants, SEGCO, and Nicor Gas believes that it will maintain sufficient access to these financial markets based upon current credit ratings. However, certain events or market disruptions may increase the cost of borrowing or adversely affect the ability to raise capital through the issuance of securities or other borrowing arrangements or the ability to secure committed bank lending agreements used as back-up sources of capital. Such disruptions could include:
include an economic downturn or uncertainty;
bankruptcy or financial distress at an unrelated energy company, financial institution, or sovereign entity;
capital markets volatility and disruption, either nationally or internationally;
changes in tax policy;
volatility in market prices for electricity and natural gas;
terrorist attacks actual or threatened cyber or physical attacks on the Southern Company system's facilities or unrelated energy companies' facilities;
war or threat of war; or
the overall health of the utility and financial institution industries.
As of December 31, 2016, Mississippi Power’s current liabilities exceeded current assets by approximately $371 million primarilyAdditionally, due to $551 milliona portion of the Registrants' indebtedness bearing interest at fluctuating rates based on LIBOR or other benchmark rates, the potential phasing out of these rates may adversely affect the costs of financing. The discontinuation, reform, or replacement of LIBOR or any other benchmark rates may have an unpredictable impact on contractual relationships in promissory notesthe credit markets or cause disruption to the broader financial markets and could result in adverse consequences to the return on, value of, and market for the Registrants' securities and other instruments whose returns are linked to any such benchmark.
Failure to comply with debt covenants or conditions could adversely affect the ability of the Registrants, SEGCO, Southern Company which mature in December 2017, $35 million in senior notes which mature in November 2017,Gas Capital, or Nicor Gas to execute future borrowings.
The debt and $63 million in short-term debt. Mississippi Power expectscredit agreements of the funds needed to satisfy the promissory notes toRegistrants, SEGCO, Southern Company will exceed amounts available from operating cash flows, lines of credit,Gas Capital, and Nicor Gas contain various financial and other external sources. Accordingly, Mississippi Power intends to satisfy these obligations through loans and/or equity contributions from Southern Company. Specifically, Mississippi Power has been informed by Southern Company that, in the event sufficient funds are not available from external sources, Southern Company intends to (i) extend the maturity of the $551 million in promissory notes and (ii) provide Mississippi Power with loans and/or equity contributions sufficient to fund the remaining indebtedness scheduled to mature and other cash needs over the next 12 months.

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covenants. Georgia Power's ability to make future borrowings through its term loan credit facilityguarantee agreement with the Federal Financing Bank is subjectDOE contains additional covenants, events of default, and mandatory prepayment events relating to the satisfactionconstruction of customary conditions, as well as certification of compliance with the requirements of the loan guarantee program under Title XVII of the Energy Policy Act of 2005, including accuracy of project-related representations and warranties, delivery of updated project-related information and evidence of compliance with the prevailing wage requirements of the Davis-Bacon Act of 1931, as amended, and certification from the DOE's consulting engineer that proceeds of the advances are used to reimburse certain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under4. Failure to meet those covenants beyond applicable grace periods could result in accelerated due dates and/or termination of the Title XVII Loan Guarantee Program.agreements, which would negatively affect the applicable company's financial condition and liquidity.
Volatility in the securities markets, interest rates, and other factors could substantially increase defined benefit pension and other postretirement plan costs and the costs offunding available for nuclear decommissioning.
The costs of providing pension and other postretirement benefit plans are dependent on a number of factors, such as the rates of return on plan assets, discount rates, the level of interest rates used to measure the required minimum funding levels of the plan, changes in actuarial assumptions, future government regulation, changes inregulations, and/or life expectancy, and the frequency and amount of the Southern Company system's required or voluntary contributions made to the plans. Changes in actuarial assumptions and differences between the assumptions and actual values, as well as a significant decline in the value of investments that fund the pension and other postretirement plans, if not offset or mitigated by a decline in plan liabilities, could increase pension and other postretirement expense, and the Southern Company system could be required from time to time to fund the pension plans with significant amounts of cash. Such cash funding obligations could have a material impact on liquidity by reducing cash flows and could negatively affect results of operations. See MANAGEMENT'S DISCUSSION AND ANALYSIS – ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Pension and Other Postretirement Benefits" in Item 7 herein and Note 11 to the financial statements in Item 8 herein for additional information regarding the defined benefit pension and other postretirement plans. Additionally, Alabama Power and Georgia Power each hold significant assets in their nuclear decommissioning trusts to satisfy obligations to decommission Alabama Power's and Georgia Power'stheir nuclear plants. The rate of return on assets held in those trusts can significantly impact both the costs offunding available for decommissioning and the funding requirements for the trusts. See Note 6 to the financial statements under "Nuclear Decommissioning" in Item 8 herein for additional information.
Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasThe Registrants are subject to risks associated with their ability to obtain adequate insurance at acceptable costs.
The financial condition of some insurance companies, the threat of terrorism,actual or threatened physical or cyber attacks, and natural disasters, among other things, could have disruptive effects on insurance markets. The availability of insurance covering risks that Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, and their respective competitors typically insure against may decrease, and the insurance that Southern Company, the traditional electric operating companies, Southern Power, and Southern Company GasRegistrants are able to obtain may have higher deductibles, higher premiums, and more restrictive policy terms. Further, the insurance policies maintained by Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas may not cover all of the potential exposures or the actual amount of loss incurred.
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Any losses not covered by insurance, or any increases in the cost of applicable insurance, could adversely affect the results of operations, cash flows, or financial condition of Southern Company, the traditional electric operating companies, Southern Power, or Southern Company Gas.affected Registrant.
The use of derivative contracts by Southern Company and its subsidiaries in thenormal course of business could result in financial losses that negatively impact thenet income of Southern Company and its subsidiariesthe Registrants or in reported net income volatility.
Southern Company and its subsidiaries including the traditional electric operating companies, Southern Power, and Southern Company Gas, use derivative instruments, such as swaps, options, futures, and forwards, to manage their commodity and interest rate exposures and, to a lesser extent, manage foreign currency exchange rate exposure and engage in limited trading activities. Southern Company and its subsidiariesThe Registrants could recognize financial losses as a result of volatility in the market values of these contracts or if a counterparty fails to perform. These risks are managed through risk management policies, limits, and procedures. These risk management policies, limits, and procedures, which might not work as planned and cannot entirely eliminate the risks associated with these activities. In addition, derivative contracts entered into for hedging purposes might not off-setoffset the underlying exposure being hedged as expected, resulting in financial losses. In the absence of actively quoted market prices and pricing information from external sources, the valuation of these financial instruments can involve management's judgment or use of estimates. The factors used in the valuation of these instruments become more difficult to predict and the calculations become less reliable the further into the future these estimates are made.future. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.
In addition, Southern Company Gas utilizes derivative instruments to lock in economic value in wholesale gas services, which may not qualify as, or aremay not be designated as, hedges for accounting purposes. The difference in accounting treatment for the underlying position and the financial instrument used to hedge the value of the contract can cause volatility in reported net income of Southern Company and Southern Company Gas while the positions are open due to mark-to-market accounting.

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Table of ContentsIndexSee Notes 13 and 14 to Financial Statements

the financial statements in Item 8 herein for additional information.
Future impairments of goodwill or long-lived assets could have a material adverse effect on Southern Company's and its subsidiaries'the Registrants' results of operations.
Goodwill is assessed for impairment at least annually and more frequently if events or circumstances occur that would more likely than not reduce the fair value of a reporting unit below its carrying value and long-lived assets are assessed for impairment whenever events or circumstances indicate that an asset's carrying amount may not be recoverable. In connection with the completion of the Merger, the application of the acquisition method of accounting was pushed down to Southern Company Gas. The excess of the purchase price over the fair values of Southern Company Gas' assets and liabilities was recorded as goodwill. This resulted in a significant increase in the goodwill recorded on Southern Company's and Southern Company Gas' consolidated balance sheets. At December 31, 2019, goodwill was $5.3 billion and $5.0 billion for Southern Company and Southern Company Gas, respectively.
In addition, Southern Company and its subsidiaries have long-lived assets recorded on their balance sheets. To the extent the value of goodwill or long-lived assets become impaired, Southern Company, Southern Company Gas, Southern Power, and the traditional electric operating companiesaffected Registrant may be required to incur impairment charges that could have a material impact on their results of operations. For example, Southern Company Gas has two natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either of these natural gas storage facilities. See Note 3 to the financial statements under "Other Matters" in Item 8 herein for information regarding certain impairment charges at Southern Company and Southern Company Gas.
Item 1B.UNRESOLVED STAFF COMMENTS.
None.

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Item 2. PROPERTIES
Electric
Electric Properties
The traditional electric operating companies, Southern Power, and SEGCO, at December 31, 2016,2019, owned and/or operated 3330 hydroelectric generating stations, 2924 fossil fuel generating stations, three nuclear generating stations, 1413 combined cycle/cogeneration stations, 3342 solar facilities, seven10 wind facilities, one biomassfuel cell facility, and one landfill gasbattery storage facility. The amounts of capacity for each company as ofat December 31, 2016,2019 are shown in the table below.
Generating StationLocation
Nameplate
Capacity (1)

 
  (KWs)
 
FOSSIL STEAM   
GadsdenGadsden, AL120,000
(2)
GorgasJasper, AL1,021,250
 
BarryMobile, AL1,300,000
(2)
Greene CountyDemopolis, AL300,000
(3)
Gaston Unit 5Wilsonville, AL880,000
 
MillerBirmingham, AL2,532,288
(4)
Alabama Power Total 6,153,538
 
BowenCartersville, GA3,160,000
 
HammondRome, GA800,000
 
McIntoshEffingham County, GA163,117
 
SchererMacon, GA750,924
(5)
WansleyCarrollton, GA925,550
(6)
YatesNewnan, GA700,000
 
Georgia Power Total 6,499,591
 
CristPensacola, FL970,000
 
DanielPascagoula, MS500,000
(7)
Scherer Unit 3Macon, GA204,500
(5)
Gulf Power Total 1,674,500
 
DanielPascagoula, MS500,000
(7)
Greene CountyDemopolis, AL200,000
(3)
WatsonGulfport, MS862,000
(8)
Mississippi Power Total 1,562,000
 
Gaston Units 1-4Wilsonville, AL  
SEGCO Total 1,000,000
(9)
Total Fossil Steam 16,889,629
 
IGCC   
Kemper County/RatcliffeKemper County, MS (10)
Mississippi Power Total 622,906
 

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Table The traditional electric operating companies have certain jointly-owned generating stations. For these facilities, the nameplate capacity shown represents the Registrant's portion of ContentsIndex to Financial Statements

Generating StationLocation
Nameplate
Capacity (1)

 
NUCLEAR STEAM   
FarleyDothan, AL  
Alabama Power Total 1,720,000
 
HatchBaxley, GA899,612
(11)
Vogtle Units 1 and 2Augusta, GA1,060,240
(12)
Georgia Power Total 1,959,852
 
Total Nuclear Steam 3,679,852
 
COMBUSTION TURBINES   
Greene CountyDemopolis, AL  
Alabama Power Total 720,000
 
BoulevardSavannah, GA19,700
 
McDonough Unit 3Atlanta, GA78,800
 
McIntosh Units 1 through 8Effingham County, GA640,000
 
McManusBrunswick, GA481,700
 
RobinsWarner Robins, GA158,400
 
WansleyCarrollton, GA26,322
(6)
WilsonAugusta, GA354,100
 
Georgia Power Total 1,759,022
 
Lansing Smith Unit APanama City, FL39,400
 
Pea Ridge Units 1 through 3Pea Ridge, FL15,000
 
Gulf Power Total 54,400
 
Chevron Cogenerating StationPascagoula, MS147,292
(13)
SweattMeridian, MS39,400
 
WatsonGulfport, MS39,360
 
Mississippi Power Total 226,052
 
AddisonThomaston, GA668,800
 
Cleveland CountyCleveland County, NC720,000
 
DahlbergJackson County, GA756,000
 
OleanderCocoa, FL791,301
 
RowanSalisbury, NC455,250
 
Southern Power Total 3,391,351
 
Gaston (SEGCO)
Wilsonville, AL19,680
(9)
Total Combustion Turbines 6,170,505
 
COGENERATION   
Washington CountyWashington County, AL123,428
 
GE Plastics ProjectBurkeville, AL104,800
 
TheodoreTheodore, AL236,418
 
Total Cogeneration 464,646
 

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Generating StationLocation
Nameplate
Capacity (1)

 
COMBINED CYCLE   
BarryMobile, AL  
Alabama Power Total 1,070,424
 
McIntosh Units 10&11Effingham County, GA1,318,920
 
McDonough-Atkinson Units 4 through 6Atlanta, GA2,520,000
 
Georgia Power Total 3,838,920
 
SmithLynn Haven, FL  
Gulf Power Total 545,500
 
DanielPascagoula, MS  
Mississippi Power Total 1,070,424
 
FranklinSmiths, AL1,857,820
 
HarrisAutaugaville, AL1,318,920
 
MankatoMankato, MN375,000
 
RowanSalisbury, NC530,550
 
Stanton Unit AOrlando, FL428,649
(14)
WansleyCarrollton, GA1,073,000
 
Southern Power Total 5,583,939
 
Total Combined Cycle 12,109,207
 
HYDROELECTRIC FACILITIES   
BankheadHolt, AL53,985
 
BouldinWetumpka, AL225,000
 
HarrisWedowee, AL132,000
 
HenryOhatchee, AL72,900
 
HoltHolt, AL46,944
 
JordanWetumpka, AL100,000
 
LayClanton, AL177,000
 
Lewis SmithJasper, AL157,500
 
Logan MartinVincent, AL135,000
 
MartinDadeville, AL182,000
 
MitchellVerbena, AL170,000
 
ThurlowTallassee, AL81,000
 
WeissLeesburg, AL87,750
 
YatesTallassee, AL47,000
 
Alabama Power Total 1,668,079
 
Bartletts FerryColumbus, GA173,000
 
Goat RockColumbus, GA38,600
 
Lloyd ShoalsJackson, GA14,400
 
Morgan FallsAtlanta, GA16,800
 
North HighlandsColumbus, GA29,600
 
Oliver DamColumbus, GA60,000
 
Rocky MountainRome, GA215,256
(15)
Sinclair DamMilledgeville, GA45,000
 
Tallulah FallsClayton, GA72,000
 
TerroraClayton, GA16,000
 
TugaloClayton, GA45,000
 
Wallace DamEatonton, GA321,300
 
YonahToccoa, GA22,500
 

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Generating StationLocation
Nameplate
Capacity (1)

 
6 Other PlantsVarious Georgia locations18,080
 
Georgia Power Total 1,087,536
 
Total Hydroelectric Facilities 2,755,615
 
RENEWABLE SOURCES:   
SOLAR FACILITIES   
Fort BenningColumbus, GA30,000
 
Fort GordonAugusta, GA30,000
 
Fort StewartFort Stewart, GA30,000
 
Kings BayCamden County, GA30,000
 
DaltonDalton, GA6,305
 
3 Other PlantsVarious Georgia locations2,789
 
Georgia Power Total 129,094
 
AdobeKern County, CA20,000
 
ApexNorth Las Vegas, NV20,000
 
Boulder IClark County, NV100,000
 
ButlerTaylor County, GA103,700
 
Butler Solar FarmTaylor County, GA22,000
 
CalipatriaImperial County, CA20,000
 
Campo VerdeImperial County, CA147,420
 
CimarronSpringer, NM30,640
 
Decatur CountyDecatur County, GA20,000
 
Decatur ParkwayDecatur County, GA84,000
 
Desert StatelineSan Bernadino County, CA299,900
(16)
GarlandKern County, CA205,130
 
GranvilleOxford, NC2,500
 
HenriettaKings County, CA102,000
 
Imperial ValleyImperial County, CA163,200
 
Lost Hills - BlackwellKern County, CA33,440
 
Macho SpringsLuna County, NM55,000
 
Morelos del SolKern County, CA15,000
 
North StarFresno County, CA61,600
 
PawpawTaylor County, GA30,480
 
RoserockPecos County, TX160,000
 
RutherfordRutherford County, NC74,800
 
SandhillsTaylor County, GA146,890
 
SpectrumClark County, NV30,240
 
TranquillityFresno County, CA205,300
 
Southern Power Total 2,153,240
(17)
Total Solar 2,282,334
 
WIND FACILITIES   
Grant PlainsGrant County, OK147,200
 
Grant WindGrant County, OK151,800
 
Kay WindKay County, OK299,000
 
PassadumkeagPenobscot County, ME42,900
 
Salt ForkDonley & Gray Counties TX174,000
 
Tyler BluffCooke County, TX125,580
 
Wake WindCrosby & Floyd Counties, TX257,250
(18)

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total plant capacity, with ownership percentages provided if less than 100%.
Generating StationStation/Ownership PercentageLocation
Nameplate
Capacity (1)(a)


 
Southern Power Total 1,197,730(KWs)

 
LANDFILL GAS FACILITYFOSSIL STEAM   
PerdidoGadsdenEscambia County, FLGadsden, AL120,000
 
GulfBarryMobile, AL1,300,000
Greene County (60%)Demopolis, AL300,000
Gaston Unit 5Wilsonville, AL880,000
Miller (95.92%)Birmingham, AL2,532,288
Alabama Power Total 3,2005,132,288

 
BIOMASS FACILITYBowenCartersville, GA3,160,000
 
NacogdochesSacul, TX
Southern Power Total115,500
Total Generating Capacity46,291,124
Notes:
(1)See "Jointly-Owned Facilities" herein for additional information.
(2)In April 2015, as part of its environmental compliance strategy, Alabama Power ceased using coal at Gadsden Steam Plant and at Plant Barry Units 1 and 2 (250 MWs), but such units will remain available with natural gas as the fuel source. Alabama Power retired Plant Barry Unit 3 (225 MWs) in August 2015 and it is no longer available for generation.
(3)Owned by Alabama Power and Mississippi Power as tenants in common in the proportions of 60% and 40%, respectively. In April 2016, Alabama Power and Mississippi Power ceased using coal and began operating Units 1 and 2 solely on natural gas in June 2016 and July 2016, respectively. See Note 3 to the financial statements of Southern Company, Alabama Power, and Mississippi Power under "Regulatory Matters – Alabama Power – Environmental Accounting Order," "Retail Regulatory Matters – Environmental Accounting Order," and "Retail Regulatory Matters – Environmental Compliance Overview Plan," respectively, in Item 8 herein.
(4)Capacity shown is Alabama Power's portion (91.84%) of total plant capacity.
(5)Capacity shown for Georgia Power is 8.4%Scherer (8.4% of Units 1 and 2 and 75% of Unit 3. Capacity shown for Gulf Power is 25% of Unit 3.3)Macon, GA750,924
(6)Wansley (53.5%)Capacity shown is Georgia Power's portion (53.5%) of total plant capacity.Carrollton, GA925,550
(7)YatesRepresents 50% of Plant Newnan, GA700,000
Georgia Power Total5,536,474
Daniel (50%)Pascagoula, MS500,000
Greene County (40%)Demopolis, AL200,000
WatsonGulfport, MS750,000
Mississippi Power Total1,450,000
Gaston Units 1-4Wilsonville, AL
SEGCO Total1,000,000
(b)
Total Fossil Steam13,118,762
NUCLEAR STEAM
FarleyDothan, AL
Alabama Power Total1,720,000
Hatch (50.1%)Baxley, GA899,612
Vogtle Units 1 and 2 which are owned as tenants in common by Gulf Power and Mississippi Power.(45.7%)Augusta, GA1,060,240
(8)Georgia Power Total1,959,852
Total Nuclear Steam3,679,852
Table of ContentsIndex to Financial Statements

Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

COMBUSTION TURBINES
Greene CountyDemopolis, AL
Alabama Power Total720,000
BoulevardSavannah, GA19,700
McDonough Unit 3Atlanta, GA78,800
McIntosh Units 1 through 8Effingham County, GA640,000
McManusBrunswick, GA481,700
RobinsWarner Robins, GA158,400
Wansley (53.5%)Carrollton, GA26,322
WilsonAugusta, GA354,100
Georgia Power Total1,759,022
SweattMeridian, MS39,400
WatsonGulfport, MS39,360
Mississippi Power ceased burning coalTotal78,760
AddisonThomaston, GA668,800
Cleveland CountyCleveland County, NC720,000
DahlbergJackson County, GA756,000
RowanSalisbury, NC455,250
Southern Power Total2,600,050
Gaston (SEGCO)
Wilsonville, AL19,680
(b)
Total Combustion Turbines5,177,512
COGENERATION
Washington CountyWashington County, AL123,428
Lowndes CountyBurkeville, AL104,800
TheodoreTheodore, AL236,418
Alabama Power Total464,646
Chevron Cogenerating StationPascagoula, MS147,292
(c)
Mississippi Power Total147,292
Total Cogeneration611,938
COMBINED CYCLE
BarryMobile, AL
Alabama Power Total1,070,424
McIntosh Units 10 and other solid fuel at Plant Watson11Effingham County, GA1,318,920
McDonough-Atkinson Units 4 and 5 (750 MWs) and began operating those units solely on natural gas in April 2015. through 6Atlanta, GA2,520,000
Georgia Power Total3,838,920
DanielPascagoula, MS1,070,424
RatcliffeKemper County, MS769,898
Mississippi Power retired Plant Sweatt Units 1 and 2 (80 MWs) on July 31, 2016.Total1,840,322
(9)FranklinSEGCO is jointly-owned by Smiths, AL1,857,820
HarrisAutaugaville, AL1,318,920
MankatoMankato, MN720,000
(d)
RowanSalisbury, NC530,550
Wansley Units 6 and 7Carrollton, GA1,073,000
Southern Power Total5,500,290
Total Combined Cycle12,249,956
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

HYDROELECTRIC FACILITIES
BankheadHolt, AL53,985
BouldinWetumpka, AL225,000
HarrisWedowee, AL132,000
HenryOhatchee, AL72,900
HoltHolt, AL46,944
JordanWetumpka, AL100,000
LayClanton, AL177,000
Lewis SmithJasper, AL157,500
Logan MartinVincent, AL135,000
MartinDadeville, AL182,000
MitchellVerbena, AL170,000
ThurlowTallassee, AL81,000
WeissLeesburg, AL87,750
YatesTallassee, AL47,000
Alabama Power Total1,668,079
Bartletts FerryColumbus, GA173,000
BurtonClayton, GA6,120
Flint RiverAlbany, GA5,400
Goat RockColumbus, GA38,600
Lloyd ShoalsJackson, GA14,400
Morgan FallsAtlanta, GA16,800
NacoocheeLakemont, GA4,800
North HighlandsColumbus, GA29,600
Oliver DamColumbus, GA60,000
Rocky Mountain (25.4%)Rome, GA229,362
(e)
Sinclair DamMilledgeville, GA45,000
Tallulah FallsClayton, GA72,000
TerroraClayton, GA16,000
TugaloClayton, GA45,000
Wallace DamEatonton, GA321,300
YonahToccoa, GA22,500
Georgia Power Total1,099,882
Total Hydroelectric Facilities2,767,961
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Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

RENEWABLE SOURCES:
SOLAR FACILITIES
Fort RuckerCalhoun County, AL10,560
Anniston Army DepotDale County, AL7,380
Alabama Power Total17,940
Fort BenningColumbus, GA30,005
Fort GordonAugusta, GA30,000
Fort StewartFort Stewart, GA30,000
Kings BayCamden County, GA30,161
DaltonDalton, GA6,508
Marine Corps Logistics BaseAlbany, GA31,161
6 Other PlantsVarious Georgia locations11,171
Georgia Power Total169,006
AdobeKern County, CA20,000
ApexNorth Las Vegas, NV20,000
Boulder IClark County, NV100,000
ButlerTaylor County, GA104,000
Butler Solar FarmTaylor County, GA22,000
CalipatriaImperial County, CA20,000
Campo VerdeImperial County, CA147,420
CimarronSpringer, NM30,640
Decatur CountyDecatur County, GA20,000
Decatur ParkwayDecatur County, GA84,000
Desert StatelineSan Bernadino County, CA299,900
East PecosPecos County, TX120,000
GarlandKern County, CA205,290
Gaskell West IKern County, CA20,000
GranvilleOxford, NC2,500
HenriettaKings County, CA102,000
Imperial ValleyImperial County, CA163,200
LamesaDawson County, TX102,000
Lost Hills - BlackwellKern County, CA32,000
Macho SpringsLuna County, NM55,000
Morelos del SolKern County, CA15,000
North StarFresno County, CA61,600
PawpawTaylor County, GA30,480
RoserockPecos County, TX160,000
RutherfordRutherford County, NC74,800
SandhillsTaylor County, GA148,000
SpectrumClark County, NV30,240
TranquillityFresno County, CA205,300
Southern Power Total2,395,370
(f)
Total Solar2,582,316
Table of ContentsIndex to Financial Statements

Generating Station/Ownership PercentageLocation
Nameplate
Capacity(a)

WIND FACILITIES
BethelCastro County, TX276,000
Cactus FlatsConcho County, TX148,350
Grant PlainsGrant County, OK147,200
Grant WindGrant County, OK151,800
Kay WindKay County, OK299,000
PassadumkeagPenobscot County, ME42,900
Salt ForkDonley & Gray Counties TX174,000
Tyler BluffCooke County, TX125,580
Wake WindCrosby & Floyd Counties, TX257,250
Wildhorse MountainPushmataha County, OK100,000
Southern Power Total1,722,080
(g)
FUEL CELL FACILITY
Redlion and Brookside (DSGP)New Castle and Newark, DE27,500
(h)
Southern Power Total27,500
BATTERY STORAGE FACILITY
MillikenOrange County, CA2,000
(i)
Southern Power Total2,000
Total Alabama Power Generating Capacity10,793,377
Total Georgia Power Generating Capacity14,363,156
Total Mississippi Power Generating Capacity3,516,374
Total Southern Power Generating Capacity12,247,290
Total Generating Capacity41,939,877
(a)
See "Jointly-Owned Facilities" and "Titles to Property" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information.
(b)
Alabama Power and Georgia Power.Power each own 50% of the outstanding common stock of SEGCO, an operating public utility company. Alabama Power and Georgia Power are each entitled to one-half of SEGCO's capacity and energy. Alabama Power acts as SEGCO's agent in the operation of SEGCO's units and furnishes fuel to SEGCO for its units. See BUSINESSNote 7 to the financial statements under "SEGCO" in Item 18 herein for additional information.
(10)(c)The capacity shown is the gross capacity using natural gas fuel without supplemental firing. The net capacity using lignite fuel with supplemental firing is expected to be 582 MWs. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper IGCC in service using natural gas in 2014 and expects to place the remainder of the Kemper IGCC, including the gasifier and the gas clean-up facilities, in service by mid-March 2017.
(11)Capacity shown is Georgia Power's portion (50.1%) of total plant capacity.
(12)Capacity shown is Georgia Power's portion (45.7%) of total plant capacity.
(13)
Generation is dedicated to a single industrial customer. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" in Item 7 herein.
(14)(d)Capacity shown is
On January 17, 2020, Southern Power's portion (65%)Power completed the sale of total plant capacity.its equity interest in Plant Mankato to a subsidiary of Xcel. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" in Item 8 herein for additional information.
(15)(e)Capacity shown is Georgia Power's portion (25.4%) of total plant capacity. OPC operates the plant.Operated by OPC.
(16)110 MWs were placed in service in the fourth quarter 2015 and 189 MWs were placed in service through July 2016, bringing the facility's total capacity to approximately 300 MWs.
(17)(f)Southern Power totalowns a 67% equity interest in SP Solar (a limited partnership indirectly owning all of Southern Power's solar facilities, except the Roserock and Gaskell West facilities). SP Solar is the 51% majority owner of Boulder 1, Garland, Henrietta, Imperial Valley, Lost Hills Blackwell, North Star, and Tranquillity; the 66% majority owner of Desert Stateline; and the sole owner of the remaining SP Solar facilities. Southern Power is the 51% majority owner of Roserock and also the controlling partner in a tax equity partnership owning Gaskell West. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in the table is 100% of the nameplate capacity for eachthe respective facility. When taking into consideration
(g)Southern Power is the controlling member in SP Wind (a tax equity entity owning all of Southern Power's 90% equity interest in STRwind facilities, except Cactus Flats and various 66%Wildhorse Mountain). SP Wind is the 90.1% majority owner of Wake Wind and 51% equity interests in SRP's nine solar partnerships, Southern Power's equity portionowns 100% of the total nameplate capacity from all solar facilitiesremaining SP Wind facilities. Southern Power is 1,505 MWs. See Note 2 to the financial statementscontrolling partner in tax equity partnerships owning Cactus Flats and Wildhorse Mountain. All of these entities are consolidated subsidiaries of Southern Power and the capacity shown in Item 8 herein and Note 12 to the financial statementstable is 100% of Southern Company under "Southern Power" in Item 8 hereinthe nameplate capacity for additional information.the respective facility.
(18)(h)Southern Power owns 90.1%.has two noncontrolling interest partners that own approximately 10 MWs of the facility.
(i)Southern Power has an equity method investment in the facility as the Class B member.
Except as discussed below under "Titles to Property," the principal plants and other important units of the traditional electric operating companies, Southern Power, and SEGCO are owned in fee by the respective companies. It is the opinion of

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management of each such company that its operating properties are adequately maintained and are substantially in good operating condition, and suitable for their intended purpose.
Mississippi Power owns a 79-mile length of 500-kilovolt transmission line which is leased to Entergy Gulf States Louisiana, LLC. The line completed in 1984, extends from Plant Daniel to the Louisiana state line. Entergy Gulf States Louisiana, LLC is paying a use fee over a 40-year periodthrough 2024 covering all expenses and the amortization of the original $57 million cost of the line.cost. At December 31, 2016,2019, the unamortized portion of this cost was approximately $16$10 million.
In conjunction with the Kemper IGCC,

Mississippi Power owns a lignite mine and equipment andthat were intended to provide fuel for the Kemper IGCC. Mississippi Power also has acquired and will continue to acquire mineral reserves located around the Kemper IGCC site in Kemper County. The mine, operated by North American Coal Corporation, started commercial operation in 2013 withCounty energy facility. Liberty Fuels Company, LLC, the capital costoperator of the mine, has a legal obligation to perform mine reclamation and equipment totaling approximately $325 million as of December 31, 2016. See MANAGEMENT'S DISCUSSION AND ANALYSIS – FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle – Lignite Mine and CO2 Pipeline Facilities" of Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in Item 7 herein2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 32 to the financial statements of Southern Company and under "Mississippi Power under "Integrated Coal Gasification Combined CycleKemper County Energy FacilityLignite Mine and CO2 Pipeline Facilities"Facilities" in Item 8 herein for additional information.
In December 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, which identified alternatives that, if implemented, could impact Mississippi Power's generating stations, including Plant Greene County, which is jointly owned with Alabama Power. See BUSINESS in Item 1 herein under "Rate MattersIntegrated Resource PlanningMississippi Power" and Note 2 to the financial statements under "Mississippi PowerReserve Margin Plan" in Item 8 herein for additional information.
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for information onregarding the lignite mine.sale of Gulf Power.
In 2016,2019, the maximum demand on the traditional electric operating companies, Southern Power Company, and SEGCO was 35,781,00034,209,000 KWs and occurred on July 25, 2016.August 13, 2019. The all-time maximum demand of 38,777,000 KWs on the traditional electric operating companies (including Gulf Power), Southern Power Company, and SEGCO occurred on August 22, 2007. These amounts exclude demand served by capacity retained by MEAG Power, OPC, and SEPA. The reserve margin for the traditional electric operating companies, Southern Power Company, and SEGCO in 20162019 was 34.2%28.1%. See SELECTED FINANCIAL DATA in Item 6 herein for additional information.
Jointly-Owned Facilities
Alabama Power, Georgia Power, and SouthernMississippi Power at December 31, 20162019 had undivided interests in certain generating plants and other related facilities with non-affiliated parties. The percentages of ownership of the total plant or facility are as follows:
   Percentage Ownership   Percentage Ownership  
 
Total
Capacity
 
Alabama
Power
 
Power
South
 
Georgia
Power
 OPC 
MEAG
Power
 Dalton 
Southern
Power
 OUC FMPA KUA 
Total
Capacity
 
Alabama
Power
 
Power
South
 
Georgia
Power
 
Mississippi
Power
 OPC 
MEAG
Power
 Dalton 
Gulf
Power
 (MWs)                     (MWs)                
Plant Miller Units 1 and 2 1,320
 91.8% 8.2% % % % % % % % % 1,320
 91.8% 8.2% % % % % % %
Plant Hatch 1,796
 
 
 50.1
 30.0
 17.7
 2.2
 
 
 
 
 1,796
 
 
 50.1
 
 30.0
 17.7
 2.2
 
Plant Vogtle
Units 1 and 2
 2,320
 
 
 45.7
 30.0
 22.7
 1.6
 
 
 
 
 2,320
 
 
 45.7
 
 30.0
 22.7
 1.6
 
Plant Scherer Units 1 and 2 1,636
 
 
 8.4
 60.0
 30.2
 1.4
 
 
 
 
 1,636
 
 
 8.4
 
 60.0
 30.2
 1.4
 
Plant Scherer Unit 3 818
 
 
 75.0
 
 
 
 
 25.0
Plant Wansley 1,779
 
 
 53.5
 30.0
 15.1
 1.4
 
 
 
 
 1,779
 
 
 53.5
 
 30.0
 15.1
 1.4
 
Rocky Mountain 848
 
 
 25.4
 74.6
 
 
 
 
 
 
 903
 
 
 25.4
 
 74.6
 
 
 
Plant Stanton A 660
 
 
 
 
 
 
 65.0
 28.0
 3.5
 3.5
Plant Daniel Units 1 and 2 1,000
 
 
 
 50.0
 
 
 
 50.0
Alabama Power, Georgia Power, and GeorgiaMississippi Power have contracted to operate and maintain the respective units in which each has an interest (other than Rocky Mountain) as agent for the joint owners. SCS provides operation and maintenance services for Plant Stanton A. Southern Nuclear operates and provides services to Alabama Power's and Georgia Power's nuclear plants.
In addition, Georgia Power has commitments, in the form of capacity purchases, regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity
Table of ContentsIndex to Financial Statements

are required whether or not any capacity is available. The energy cost is a function of each unit's variable operating costs. Except for the portionPortions of the capacity payments relatedmade to the Georgia PSC's disallowances ofMEAG Power for its Plant Vogtle Units 1 and 2 investment relate to costs in excess of Georgia Power's allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity and energy is included in purchased power from non-affiliates in Georgia Power's statements of income in Item 8 herein. Also see Note 73 to the financial statements of Georgia Power under "Commitments – Fuel and Purchased Power Agreements""Commitments" in Item 8 herein for additional information.
Georgia Power is currently constructingConstruction continues on Plant Vogtle Units 3 and 4, which will beare jointly owned by Georgia Power, Dalton, OPC, and MEAG Powerthe Vogtle Owners (with each owner holding the same undivided ownership interest as shown in the table above with respect to Plant Vogtle Units 1 and 2). See Note 32 to the financial statements of Southern Company and under "Georgia Power under "Regulatory MattersGeorgia Power – Nuclear Construction" and "Retail Regulatory Matters – Nuclear Construction" respectively, in Item 8 herein.

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Titles to Property
The traditional electric operating companies', Southern Power's, and SEGCO's interests in the principal plants (other than certain pollution control facilities and the land on which five combustion turbine generators of Mississippi Power are located, which is held by easement) and other important units of the respective companies are owned in fee by such companies, subject only to the following major encumbrances: (1) liens pursuant to pollution control revenue bonds of Gulf Power on specific pollution control facilities at Plant Daniel, (2) liens pursuant to the assumption of debt obligations by Mississippi Power in connection with the acquisition of Plant Daniel Units 3 and 4, (2) a leasehold interest granted by Mississippi Power's largest retail customer, Chevron Products Company (Chevron), at the Chevron refinery, on which five combustion turbines of Mississippi Power are located, (3) liens pursuant to agreements with Chevron on Mississippi Power's co-generation assets located at the Chevron refinery, and (4) liens associated with Georgia Power's reimbursement obligations to the DOE under its loan guarantee, which are secured by a first priority lien on (a) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 and (b) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4, and (4) liens associated with two PPAs assumed as part of the acquisition of the Mankato project on October 26, 2016 by Southern Power Company.4. See Note 65 to the financial statements of Southern Company, Georgia Power, Gulf Power, Mississippi Power, and Southern Power under "Assets"Assets Subject to Lien" and Note 68 to the financial statements of Southern Companyunder "Secured Debt" and Georgia Power under "DOE"Long-term DebtDOE Loan Guarantee Borrowings" and Note 6 to the financial statements of Southern Company and Mississippi Power under "Plant Daniel Revenue Bonds"Borrowings" in Item 8 herein for additional information. The traditional electric operating companies own the fee interests in certain of their principal plants as tenants in common. See "Jointly-Owned Facilities""Jointly-Owned Facilities" herein and Note 5 to the financial statements under "Joint Ownership Agreements" in Item 8 herein for additional information. Properties such as electric transmission and distribution lines, steam heating mains, and gas pipelines are constructed principally on rights-of-way, which are maintained under franchise or are held by easement only. A substantial portion of lands submerged by reservoirs is held under flood right easements. In addition, certain of the renewable generating facilities occupy or use real property that is not owned, primarily through various leases, easements, rights-of-way, permits, or licenses from private landowners or governmental entities.
Natural Gas
Southern Company Gas considers its properties to be adequately maintained, substantially in good operating condition, and suitable for their intended purpose. The following provides the location and general character of the materially important properties that are used by the segments of Southern Company Gas. Substantially all of Nicor Gas' properties are subject to the lien of the indenture securing its first mortgage bonds. See Note 68 to the financial statements of Southern Company Gas under "Long-Term Debt – First Mortgage Bonds" in Item 8 herein for additional information.
Distribution and Transmission Mains
Southern Company Gas' distribution systems transport natural gas from its pipeline suppliers to customers in its service areas. These systems consist primarily of distribution and transmission mains, compressor stations, peak shaving/storage plants, service lines, meters, and regulators. At December 31, 2016,2019, Southern Company Gas' gas distribution operations segment owned approximately 81,80075,585 miles of underground distribution and transmission mains, which are located on easements or rights-of-way that generally provide for perpetual use.
Storage Assets
Gas Distribution Operations
Southern Company Gas owns and operates eight underground natural gas storage facilitiesfields in Illinois with a total inventoryworking capacity of approximately 150 Bcf, approximately 135 Bcf of which can beis usually cycled on an annual basis. This system is designed to meet about 50% of the estimated peak-day deliveries and approximately 40% of the normal winter deliveries in Illinois. This level of storage capability provides Nicor Gas with supply flexibility, improves the reliability of deliveries, and helps mitigate the risk associated with seasonal price movements.
Southern Company Gas also has five liquefied natural gas (LNG)four LNG plants located in Georgia New Jersey, and Tennessee with total LNG storage capacity of approximately 7.67.0 Bcf. In addition, Southern Company Gas owns onetwo propane storage facilityfacilities in Virginia, each with storage capacity of approximately 0.3 Bcf. The LNG plants and propane storage facility are used by Southern Company Gas' gas distribution operations segment to supplement natural gas supply during peak usage periods.
Storage Assets –

All Other
Southern Company Gas ownssubsidiaries own three high-deliverability natural gas storage and hub facilities that are operated byincluded in the gas midstream operationsall other segment. Jefferson Island Storage & Hub, LLC operates a storage facility in Louisiana currently consisting of two salt dome gas storage caverns. See Note 3 to the financial statements under "Other MattersSouthern Company GasNatural Gas Storage Facilities" in Item 8 herein for additional information on a related impairment charge recorded in 2019. Golden Triangle Storage, Inc. operates a storage facility in Texas consisting of two salt dome caverns. Central Valley Gas Storage, LLC operates a depleted field storage facility in California. In addition, Southern Company Gas has a LNG facility in Alabama that produces LNG for Pivotal LNG Inc. to support its business of selling LNG as a substitute fuel in various markets. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, in Item 8 herein for additional information.
Jointly-Owned Properties
Southern Company Gas' gas midstream operationspipeline investments segment has a 50% undivided ownership interest in a 115-mile pipeline facility being constructed in northwest Georgia.Georgia that was placed in service in 2017. Southern Company Gas also has an agreement to lease its 50% undivided ownership in the pipeline facility once it is placed in service.facility. See Note 45 to the financial statements of Southern Company and Southern Company Gasunder "Joint Ownership Agreements" in Item 8 herein for additional information.

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Item 3.LEGAL PROCEEDINGS
See Note 3 to the financial statements of each registrant in Item 8 herein for descriptions of legal and administrative proceedings discussed therein.
Item 4.MINE SAFETY DISCLOSURES
Not applicable.

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INFORMATION ABOUT OUR EXECUTIVE OFFICERS OF SOUTHERN COMPANY
(Identification of executive officers of Southern Company is inserted in Part I in accordance with Regulation S-K, Item 401(b), Instruction 3.)401) The ages of the officers set forth below are as of December 31, 2016.2019.
Thomas A. Fanning
Chairman, President, and Chief Executive Officer
Age 5962
ElectedFirst elected in 2003. Chairman and Chief Executive Officer since December 2010 and President since August 2010.
Art P. BeattieAndrew W. Evans
Executive Vice President and Chief Financial Officer
Age 6253
ElectedFirst elected in 2010. Executive Vice President and Chief Financial Officer since August 2010.
W. Paul Bowers
Executive Vice President
Age 60
Elected in 2001. Executive Vice President since February 2008 and Chief Executive Officer, President, and Director of Georgia Power since January 2011. Chairman of Georgia Power's Board of Directors since May 2014.
S. W. Connally, Jr.
Chairman, President, and Chief Executive Officer of Gulf Power
Age 47
Elected in 2012. Elected Chairman in July 2015 and President, Chief Executive Officer, and Director of Gulf Power since July 2012. Previously served as Senior Vice President and Chief Production Officer of Georgia Power from August 2010 through June 2012.
Mark A. Crosswhite
Executive Vice President
Age 54
Elected in 2010. Executive Vice President since December 2010 and President, Chief Executive Officer, and Director of Alabama Power since March 2014. Chairman of Alabama Power's Board of Directors since May 2014. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from July 2012 through February 2014 and President, Chief Executive Officer, and Director of Gulf Power from January 2011 through June 2012.
Andrew W. Evans
Executive Vice President
Age 50
Elected in July 2016. Executive Vice President since July 2016. President of Southern Company Gas2016 and Chief Financial Officer since May 2015 andJune 2018. Previously served as Chief Executive Officer and Chairman of Southern Company Gas' Board of Directors sincefrom January 2016. Previously served as2016 through June 2018, President of Southern Company Gas from May 2015 through June 2018, Chief Operating Officer of Southern Company Gas from May 2015 through December 2015, and Executive Vice President and Chief Financial Officer of Southern Company Gas from May 2006 through May 2015.
W. Paul Bowers
Chairman, President and Chief Executive Officer of Georgia Power
Age 63
First elected in 2001. Chief Executive Officer, President, and Director of Georgia Power since January 2011. Chairman of Georgia Power's Board of Directors since May 2014.
Stanley W. Connally, Jr.
Executive Vice President of SCS
Age 50
First elected in 2012. Executive Vice President for Operations of SCS since June 2018. Previously served as President, Chief Executive Officer, and Director of Gulf Power from July 2012 through December 2018 and Chairman of Gulf Power's Board of Directors from July 2015 through December 2018.
Mark A. Crosswhite
Chairman, President and Chief Executive Officer of Alabama Power
Age 57
First elected in 2011. President, Chief Executive Officer, and Director of Alabama Power since March 2014. Chairman of Alabama Power's Board of Directors since May 2014.
Kimberly S. Greene
Executive Vice President
Age 50
Elected in 2013. Executive ViceChairman, President, and Chief OperatingExecutive Officer of Southern Company Gas
Age 53
First elected in 2013. Chairman, President, and Chief Executive Officer of Southern Company Gas since March 2014.June 2018. Director of Southern Company Gas since July 2016. Previously served as President and Chief Executive Officer of SCS from April 2013 to February 2014. Before rejoining Southern Company, Ms. Greene previously served at Tennessee Valley Authority as Executive Vice President and Chief GenerationOperating Officer of Southern Company from 2011March 2014 through April 2013 and Group President of Strategy and External Relations from 2010 through 2011.June 2018.
James Y. Kerr II
Executive Vice President, Chief Legal Officer, and General CounselChief Compliance Officer
Age 5255
ElectedFirst elected in 2014. Also servesExecutive Vice President, Chief Legal Officer (formerly known as General Counsel), and Chief Compliance Officer. Before joining Southern Company, Mr. Kerr was a partner with McGuireWoods LLP and a senior advisor at McGuireWoods Consulting LLC from 2008 through FebruaryOfficer since March 2014.
Stephen E. Kuczynski
Chairman, President, and Chief Executive Officer of Southern Nuclear
Age 5457
ElectedFirst elected in 2011. Chairman, President, and Chief Executive Officer of Southern Nuclear since July 2011.

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Mark S. Lantrip
Executive Vice President
Age 6265
ElectedFirst elected in 2014. Executive Vice President since February 2019. Chairman, President, and Chief Executive Officer of SCS since March 2014.2014 and Chairman and Chief Executive Officer of Southern Power since March 2018. Previously served as TreasurerPresident of Southern CompanyPower from October 2007March 2018 to February 2014 and Executive Vice PresidentMay 2019.
Table of SCS from November 2010ContentsIndex to March 2014.Financial Statements

Anthony L. Wilson
Chairman, President, and Chief Executive Officer of Mississippi Power
Age 5255
ElectedFirst elected in 2015. President of Mississippi Power since October 2015 and Chief Executive Officer and Director since January 2016. Chairman of Mississippi Power's Board of Directors since August 2016. Previously served as Executive Vice President of Mississippi Power from May 2015 to October 2015 and Executive Vice President of Georgia Power from January 2012 to May 2015.
Christopher C. Womack
Executive Vice President
Age 5861
ElectedFirst elected in 2008. Executive Vice President and President of External Affairs since January 2009.
The officers of Southern Company were elected at the first meeting of the directors following the last annual meeting of stockholders held on May 25, 2016,22, 2019, for a term of one year or until their successors are elected and have qualified, except for Mr. Andrew W. Evans, whose election as Executive Vice President was effective July 18, 2016.qualified.


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INFORMATION ABOUT OUR EXECUTIVE OFFICERS OF ALABAMA POWER
(Identification of executive officers of Alabama Power is inserted in Part I in accordance with Regulation S-K, Item 401(b), Instruction 3.401.) The ages of the officers set forth below are as of December 31, 2016.2019.
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
Age 5457
ElectedFirst elected in 2014. President, Chief Executive Officer, and Director since March 1, 2014. Chairman since May 2014. Previously served as Executive Vice President and Chief Operating Officer of Southern Company from July 2012 through February 2014 and President, Chief Executive Officer, and Director of Gulf Power from January 2011 through June 2012.
Greg J. Barker
Executive Vice President
Age 5356
ElectedFirst elected in 2016. Executive Vice President for Customer Services since February 2016. Previously served as Senior Vice President of Marketing and Economic Development from April 2012 to February 2016 and Senior Vice President of Business Development and Customer Support from July 2010 to April 2012.2016.
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
Age 5760
ElectedFirst elected in 2010. Executive Vice President, Chief Financial Officer, and Treasurer since August 2010.
Zeke W. Smith
Executive Vice President
Age 5760
ElectedFirst elected in 2010. Executive Vice President of External Affairs since November 2010.
James P. Heilbron
Senior Vice President and Senior Production Officer
Age 4548
ElectedFirst elected in 2013. Senior Vice President and Senior Production Officer of Alabama Power since March 2013. Previously served as2013 and Senior Vice President and Senior Production Officer – West of SouthernSCS and Senior Production Officer of Mississippi Power Companysince October 2018.
R. Scott Moore
Senior Vice President
Age 52
First elected in 2017. Senior Vice President of Power Delivery since May 2017. Previously served as Vice President of Transmission from July 2010August 2012 to February 2013.May 2017.
The officers of Alabama Power were elected at the meeting of the directors held on April 22, 201626, 2019 for a term of one year or until their successors are elected and have qualified.



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EXECUTIVE OFFICERS OF GEORGIA POWER
(Identification of executive officers of Georgia Power is inserted in Part I in accordance with Regulation S-K, Item 401(b), Instruction 3.) The ages of the officers set forth below are as of December 31, 2016.
W. Paul Bowers
Chairman, President, and Chief Executive Officer
Age 60
Elected in 2010. Chief Executive Officer, President, and Director since December 2010 and Chief Operating Officer of Georgia Power from August 2010 to December 2010. Chairman of Georgia Power's Board of Directors since May 2014.
W. Craig Barrs (1)
Executive Vice President
Age 59
Elected in 2008. Executive Vice President of Customer Service and Operations since May 2015. Previously served as Executive Vice President of External Affairs from January 2010 to May 2015.
Pedro P. Cherry (1)
Executive Vice President
Age 45
Elected effective March 2017. Executive Vice President of Customer Service and Operations effective March 31, 2017. Senior Vice President since March 2015. Previously served as Vice President from January 2012 to March 2015.
W. Ron Hinson
Executive Vice President, Chief Financial Officer, and Treasurer
Age 60
Elected in 2013. Executive Vice President, Chief Financial Officer, and Treasurer since March 2013. Served as Corporate Secretary and Chief Compliance Officer from January 2016 through October 2016. Also, served as Comptroller from March 2013 until January 2014. Previously served as Comptroller and Chief Accounting Officer of Southern Company, as well as Senior Vice President and Comptroller of SCS from March 2006 to March 2013.
Christopher P. Cummiskey
Executive Vice President
Age 42
Elected in 2015. Executive Vice President of External Affairs since May 2015. Previously served as Chief Commercial Officer of Southern Power from October 2013 to May 2015 and Commissioner of the Georgia Department of Economic Development from January 2011 to October 2013.
Meredith M. Lackey
Senior Vice President, General Counsel, and Corporate Secretary
Age 42
Elected in November 2016. Senior Vice President, General Counsel, Corporate Secretary, and Chief Compliance Officer since November 2016. Previously served as Vice President, General Counsel, Chief Compliance Officer, and Corporate Secretary at Colonial Pipeline from January 2012 through November 2016.
Theodore J. McCullough
Senior Vice President and Senior Production Officer
Age 53
Elected in July 2016. Senior Vice President and Senior Production Officer since July 2016. Also has served as Senior Vice President of SCS since June 2010.
(1)    On January 26, 2017, Mr. Barrs resigned the role of Executive Vice President, effective March 31, 2017. Also on January 26, 2017, Mr. Pedro P. Cherry was elected to the role of Executive Vice President, effective March 31, 2017.
The officers of Georgia Power were elected at the meeting of the directors held on May 18, 2016 for a term of one year or until their successors are elected and have qualified, except for Mr. McCullough, whose election as Senior Vice President was effective July 30, 2016, Ms. Lackey, whose election as Senior Vice President, General Counsel, and Corporate Secretary was effective November 1, 2016, and Mr. Cherry, whose election as Executive Vice President is effective March 31, 2017.


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EXECUTIVE OFFICERS OF MISSISSIPPI POWER
(Identification of executive officers of Mississippi Power is inserted in Part I in accordance with Regulation S-K, Item 401(b), Instruction 3.) The ages of the officers set forth below are as of December 31, 2016.
Anthony L. Wilson
Chairman, President, and Chief Executive Officer
Age 52
Elected in 2015. President since October 2015 and Chief Executive Officer and Director since January 2016. Chairman of Mississippi Power's Board since August 2016. Previously served as Executive Vice President from May 2015 to October 2015 and Executive Vice President of Georgia Power from January 2012 to May 2015.
John W. Atherton
Vice President
Age 56
Elected in 2004. Vice President of Corporate Services and Community Relations since October 2012. Previously served as Vice President of External Affairs from January 2005 until October 2012.
A. Nicole Faulk
Vice President
Age 43
Elected in 2015. Vice President of Customer Services Organization effective April 2015. Previously served as Region Vice President for the West Region of Georgia Power from March 2015 through April 2015 and Region Manager for the Metro West Region of Georgia Power from December 2011 to March 2015.
Moses H. Feagin
Vice President, Treasurer, and Chief Financial Officer
Age 52
Elected in 2010. Vice President, Treasurer, and Chief Financial Officer since August 2010.
R. Allen Reaves, Jr.
Vice President
Age 57
Elected in 2010. Vice President and Senior Production Officer since August 2010.
Billy F. Thornton
Vice President
Age 56
Elected in 2012. Vice President of External Affairs since October 2012. Previously served as Director of External Affairs from October 2011 until October 2012.
Emile J. Troxclair, III
Vice President
Age 59
Elected in 2014. Vice President of Kemper Development since January 2015. Previously served as Vice President of Gasification for Lummus Technology Inc. from May 2013 through April 2014, Manager of E-Gas Technology for Phillips 66 from 2012 to May 2013, and Manager of E-Gas Technology for ConocoPhillips from 2003 to 2012.
The officers of Mississippi Power were elected at the meeting of the directors held on April 26, 2016 for a term of one year or until their successors are elected and have qualified.



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PART II


Item 5.MARKET FOR REGISTRANTS' COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES
(a)(1) The common stock of Southern Company is listed and traded on the NYSE.NYSE under the ticker symbol SO. The common stock is also traded on regional exchanges across the U.S. The high and low stock prices as reported on the NYSE for each quarter of the past two years were as follows:
  High Low
2016    
First Quarter $51.73
 $46.00
Second Quarter 53.64
 47.62
Third Quarter 54.64
 50.00
Fourth Quarter 52.23
 46.20
2015    
First Quarter $53.16
 $43.55
Second Quarter 45.44
 41.40
Third Quarter 46.84
 41.81
Fourth Quarter 47.50
 43.38
There is no market for the other registrants'Registrants' common stock, all of which is owned by Southern Company.
(a)(2) Number of Southern Company's common stockholders of record at January 31, 2017: 125,8272020: 110,780
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.46 in 2019 and $2.38 in 2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. Dividends on Southern Company's common stock are payable at the discretion of Southern Company's Board of Directors and depend upon earnings, financial condition, and other factors. See Note 8 to the financial statements under "Dividend Restrictions" in Item 8 herein for additional information.
Each of the other registrantsRegistrants have one common stockholder, Southern Company.
(a)(3) Dividends on each registrant's common stock are payable at the discretion of their respective board of directors. The dividends on common stock declared by Southern Company and the traditional electric operating companies (other than Mississippi Power) to their stockholder(s) for the past two years are set forth below. No dividends were declared by Mississippi Power on its common stock in 2015 or 2016.
Registrant Quarter 2016 2015
    (in thousands)
Southern Company First $496,718
 $478,454
  Second 526,267
 493,161
  Third 529,876
 493,382
  Fourth 551,110
 493,884
Alabama Power First 191,206
 142,820
  Second 191,206
 142,820
  Third 191,206
 142,820
  Fourth 191,206
 142,820
Georgia Power First 326,269
 258,570
  Second 326,269
 258,870
  Third 326,269
 258,870
  Fourth 326,269
 258,870
Gulf Power First 30,017
 32,540
  Second 30,017
 32,540
  Third 30,017
 32,540
  Fourth 30,017
 32,540
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In 2016 and 2015, Southern Power Company paid dividends to Southern Company as follows:
Registrant Quarter 2016 2015
    (in thousands)
Southern Power Company First $68,082
 $32,640
  Second 68,082
 32,640
  Third 68,082
 32,640
  Fourth 68,082
 32,640
Southern Company Gas paid dividends to Southern Company in the amount of $62,750,000 in each of the third and fourth quarters 2016.
The dividend paid per share of Southern Company's common stock was 54.25¢ for the first quarter 2016 and 56.00¢ each for the second, third, and fourth quarters of 2016. In 2015, Southern Company paid a dividend per share of 52.50¢ for the first quarter and 54.25¢ each for the second, third, and fourth quarters.
The traditional electric operating companies and Southern Power Company can only pay dividends to Southern Company out of retained earnings or paid-in-capital. The authority of the natural gas distribution utilities to pay dividends to Southern Company Gas is subject to regulation. By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates. Additionally, Elizabethtown Gas is restricted by its policy, as established by the New Jersey Board of Public Utilities, to 70% of its quarterly net income it can dividend to Southern Company Gas.
(a)(4) Securities authorized for issuance under equity compensation plans.
See Part III, Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.
(b) Use of Proceeds
Not applicable.
(c) Issuer Purchases of Equity Securities
None.
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Item 6.SELECTED FINANCIAL DATA
 Page
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(d)
 2018 2017 
2016(e)
 2015
Operating Revenues (in millions)$21,419
 $23,495
 $23,031
 $19,896
 $17,489
Total Assets (in millions)$118,700
 $116,914
 $111,005
 $109,697
 $78,318
Gross Property Additions (in millions)$7,814
 $8,205
 $5,984
 $7,624
 $6,169
Return on Average Common Equity (percent)(a)
18.15
 9.11
 3.44
 10.80
 11.68
Cash Dividends Paid Per Share of
 Common Stock
$2.4600
 $2.3800
 $2.3000
 $2.2225
 $2.1525
Consolidated Net Income Attributable to
   Southern Company (in millions)(a)
$4,739
 $2,226
 $842
 $2,448
 $2,367
Earnings Per Share —         
Basic$4.53
 $2.18
 $0.84
 $2.57
 $2.60
Diluted4.50
 2.17
 0.84
 2.55
 2.59
Capitalization (in millions):         
Common stockholders' equity$27,505
 $24,723
 $24,167
 $24,758
 $20,592
Preferred and preference stock of subsidiaries and
   noncontrolling interests(b)
4,254
 4,316
 1,361
 1,854
 1,390
Redeemable preferred stock of subsidiaries291
 291
 324
 118
 118
Redeemable noncontrolling interests
 
 
 164
 43
Long-term debt(c)
41,798
 40,736
 44,462
 42,629
 24,688
Total (excluding amounts due within one year)(c)
$73,848
 $70,066
 $70,314
 $69,523
 $46,831
Capitalization Ratios (percent):         
Common stockholders' equity37.2
 35.3
 34.4
 35.6
 44.0
Preferred and preference stock of subsidiaries and
   noncontrolling interests(b)
5.8
 6.2
 1.9
 2.7
 3.0
Redeemable preferred stock of subsidiaries0.4
 0.4
 0.5
 0.2
 0.3
Redeemable noncontrolling interests
 
 
 0.2
 0.1
Long-term debt(c)
56.6
 58.1
 63.2
 61.3
 52.6
Total (excluding amounts due within one year)(c)
100.0
 100.0
 100.0
 100.0
 100.0
Other Common Stock Data:         
Book value per share$26.11
 $23.91
 $23.99
 $25.00
 $22.59
Market price per share:         
High$64.26
 $49.43
 $53.51
 $54.64
 $53.16
Low43.26
 42.38
 46.71
 46.00
 41.40
Close (year-end)63.70
 43.92
 48.09
 49.19
 46.79
Market-to-book ratio (year-end) (percent)243.9
 183.7
 200.5
 196.8
 207.2
Price-earnings ratio (year-end) (times)14.1
 20.1
 57.3
 19.1
 18.0
Dividends paid (in millions)$2,570
 $2,425
 $2,300
 $2,104
 $1,959
Dividend yield (year-end) (percent)3.9
 5.4
 4.8
 4.5
 4.6
Dividend payout ratio (percent)54.2
 108.9
 273.2
 86.0
 82.7
Shares outstanding (in thousands):         
Average1,046,023
 1,020,247
 1,000,336
 951,332
 910,024
Year-end1,053,251
 1,033,788
 1,007,603
 990,394
 911,721
Stockholders of record (year-end)111,252
 116,135
 120,803
 126,338
 131,771
(a)Southern Company recorded a $2.6 billion pre-tax ($1.4 billion after tax) gain associated with the sale of Gulf Power in 2019. Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. In addition, pre-tax charges of $3.4 billion ($2.4 billion after tax) were recorded by Mississippi Power related to the suspension of the Kemper IGCC in 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC. See Notes 2 and 15 to the financial statements in Item 8 herein for additional information.
(b)See Note 15 to the financial statements under "Southern Power – Sales of Renewable Facility Interests" in Item 8 herein for additional information on 2018 changes in noncontrolling interests.
(c)
Amounts related to Gulf Power were reclassified to liabilities held for sale at December 31, 2018. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(d)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(e)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(a)
 2018 2017 
2016(b)
 2015
Operating Revenues (in millions):         
Residential$6,012
 $6,608
 $6,515
 $6,614
 $6,383
Commercial4,936
 5,266
 5,439
 5,394
 5,317
Industrial3,021
 3,224
 3,262
 3,171
 3,172
Other115
 124
 114
 55
 115
Total retail14,084
 15,222
 15,330
 15,234
 14,987
Wholesale2,152
 2,516
 2,426
 1,926
 1,798
Total revenues from sales of electricity16,236
 17,738
 17,756
 17,160
 16,785
Natural gas revenues3,792
 3,854
 3,791
 1,596
 
Other revenues1,391
 1,903
 1,484
 1,140
 704
Total$21,419
 $23,495
 $23,031
 $19,896
 $17,489
Kilowatt-Hour Sales (in millions):         
Residential48,528
 54,590
 50,536
 53,337
 52,121
Commercial49,101
 53,451
 52,340
 53,733
 53,525
Industrial50,106
 53,341
 52,785
 52,792
 53,941
Other726
 799
 846
 883
 897
Total retail148,461
 162,181
 156,507
 160,745
 160,484
Wholesale sales48,027
 49,963
 49,034
 37,043
 30,505
Total196,488
 212,144
 205,541
 197,788
 190,989
Average Revenue Per Kilowatt-Hour (cents):         
Residential12.39
 12.10
 12.89
 12.40
 12.25
Commercial10.05
 9.85
 10.39
 10.04
 9.93
Industrial6.03
 6.04
 6.18
 6.01
 5.88
Total retail9.49
 9.39
 9.80
 9.48
 9.34
Wholesale4.48
 5.04
 4.95
 5.20
 5.89
Total sales8.26
 8.36
 8.64
 8.68
 8.79
Average Annual Kilowatt-Hour         
Use Per Residential Customer12,135
 12,514
 11,618
 12,387
 13,318
Average Annual Revenue         
Per Residential Customer$1,503
 $1,555
 $1,498
 $1,541
 $1,630
Plant Nameplate Capacity         
Ratings (year-end) (megawatts)41,940
 45,824
 46,936
 46,291
 44,223
Maximum Peak-Hour Demand (megawatts):         
Winter30,022
 36,429
 31,956
 32,272
 36,794
Summer34,209
 34,841
 34,874
 35,781
 36,195
System Reserve Margin (at peak) (percent)28.1
 29.8
 30.8
 34.2
 33.2
Annual Load Factor (percent)60.3
 61.2
 61.4
 61.5
 59.9
Plant Availability (percent):         
Fossil-steam83.8
 81.4
 84.5
 86.4
 86.1
Nuclear92.5
 94.0
 94.7
 93.3
 93.5
(a)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(b)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 
2019(a)
 2018 2017 
2016(b)
 2015
Source of Energy Supply (percent):         
Gas47.0
 43.0
 42.6
 41.9
 42.8
Coal20.3
 25.7
 26.5
 30.2
 32.2
Nuclear14.7
 13.8
 14.5
 14.6
 15.3
Hydro3.2
 2.9
 2.1
 2.1
 2.6
Other5.9
 5.4
 5.3
 2.3
 0.8
Purchased power8.9
 9.2
 9.0
 8.9
 6.3
Total100.0
 100.0
 100.0
 100.0
 100.0
Gas Sales Volumes (mmBtu in millions):         
Firm737
 791
 729
 296
 
Interruptible106
 109
 109
 53
 
Total843
 900
 838
 349
 
Traditional Electric Operating Company
   Customers (year-end) (in thousands):
         
Residential3,688
 4,053
 4,011
 3,970
 3,928
Commercial549
 603
 599
 595
 590
Industrial17
 17
 18
 17
 17
Other12
 12
 12
 11
 11
Total electric customers4,266
 4,685
 4,640
 4,593
 4,546
Gas distribution operations customers4,277
 4,248
 4,623
 4,586
 
Total utility customers8,543
 8,933
 9,263
 9,179
 4,546
Employees (year-end)27,943
 30,286
 31,344
 32,015
 26,703
(a)
The 2019 selected financial and operating data excludes Gulf Power, which was sold effective January 1, 2019. See Note 15 to the financial statements under "Southern Company" in Item 8 herein for additional information.
(b)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016.
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SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Alabama Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$6,125
 $6,032
 $6,039
 $5,889
 $5,768
Net Income After Dividends
on Preferred and Preference Stock (in millions)
$1,070
 $930
 $848
 $822
 $785
Cash Dividends on Common Stock (in millions)$844
 $801
 $714
 $765
 $571
Return on Average Common Equity (percent)13.03
 13.00
 12.89
 13.34
 13.37
Total Assets (in millions)$29,152
 $26,730
 $23,864
 $22,516
 $21,721
Gross Property Additions (in millions)$1,862
 $2,273
 $1,949
 $1,338
 $1,492
Capitalization (in millions):         
Common stockholder's equity$8,955
 $7,477
 $6,829
 $6,323
 $5,992
Preference stock
 
 
 196
 196
Redeemable preferred stock291
 291
 291
 85
 85
Long-term debt8,270
 7,923
 7,628
 6,535
 6,654
Total (excluding amounts due within one year)$17,516
 $15,691
 $14,748
 $13,139
 $12,927
Capitalization Ratios (percent):         
Common stockholder's equity51.1
 47.7
 46.3
 48.1
 46.4
Preference stock
 
 
 1.5
 1.5
Redeemable preferred stock1.7
 1.9
 2.0
 0.7
 0.7
Long-term debt47.2
 50.4
 51.7
 49.7
 51.4
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential1,280,955
 1,273,526
 1,268,271
 1,262,752
 1,253,875
Commercial200,349
 200,032
 199,840
 199,146
 197,920
Industrial6,173
 6,158
 6,171
 6,090
 6,056
Other758
 760
 766
 762
 757
Total1,488,235
 1,480,476
 1,475,048
 1,468,750
 1,458,608
Employees (year-end)6,324
 6,650
 6,613
 6,805
 6,986


























Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Alabama Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):
         
Residential$2,449
 $2,335
 $2,302
 $2,322
 $2,207
Commercial1,635
 1,578
 1,649
 1,627
 1,564
Industrial1,393
 1,428
 1,477
 1,416
 1,436
Other24
 26
 30
 (43) 27
Total retail5,501
 5,367
 5,458
 5,322
 5,234
Wholesale — non-affiliates258
 279
 276
 283
 241
Wholesale — affiliates81
 119
 97
 69
 84
Total revenues from sales of electricity5,840
 5,765
 5,831
 5,674
 5,559
Other revenues285
 267
 208
 215
 209
Total$6,125
 $6,032
 $6,039
 $5,889
 $5,768
Kilowatt-Hour Sales (in millions):
         
Residential18,264
 18,626
 17,219
 18,343
 18,082
Commercial13,567
 13,868
 13,606
 14,091
 14,102
Industrial22,148
 23,006
 22,687
 22,310
 23,380
Other173
 187
 198
 208
 201
Total retail54,152
 55,687
 53,710
 54,952
 55,765
Wholesale — non-affiliates5,057
 5,018
 5,415
 5,744
 3,567
Wholesale — affiliates3,530
 4,565
 4,166
 3,177
 4,515
Total62,739
 65,270
 63,291
 63,873
 63,847
Average Revenue Per Kilowatt-Hour (cents):
         
Residential13.41
 12.54
 13.37
 12.66
 12.21
Commercial12.05
 11.38
 12.12
 11.55
 11.09
Industrial6.29
 6.21
 6.51
 6.35
 6.14
Total retail10.16
 9.64
 10.16
 9.68
 9.39
Wholesale3.95
 4.15
 3.89
 3.95
 4.02
Total sales9.31
 8.83
 9.21
 8.88
 8.71
Residential Average Annual
Kilowatt-Hour Use Per Customer
14,290
 14,660
 13,601
 14,568
 14,454
Residential Average Annual
Revenue Per Customer
$1,916
 $1,878
 $1,819
 $1,844
 $1,764
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
10,793
 11,815
 11,797
 11,797
 11,797
Maximum Peak-Hour Demand (megawatts):
         
Winter10,104
 11,744
 10,513
 10,282
 12,162
Summer11,211
 10,652
 10,711
 10,932
 11,292
Annual Load Factor (percent)
60.8
 60.1
 63.5
 63.5
 58.4
Plant Availability (percent):
         
Fossil-steam85.9
 81.6
 82.8
 83.0
 81.5
Nuclear91.0
 91.6
 97.6
 88.0
 92.1
Source of Energy Supply (percent):
         
Coal38.7
 43.8
 44.8
 47.1
 49.1
Nuclear21.3
 20.5
 22.2
 20.3
 21.3
Gas18.5
 17.2
 18.1
 17.1
 14.6
Hydro7.3
 6.7
 5.4
 4.8
 5.6
Purchased power —         
From non-affiliates6.0
 5.4
 4.6
 4.8
 4.4
From affiliates8.2
 6.4
 4.9
 5.9
 5.0
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Georgia Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$8,408
 $8,420
 $8,310
 $8,383
 $8,326
Net Income After Dividends
on Preferred and Preference Stock (in millions)
(*)
$1,720
 $793
 $1,414
 $1,330
 $1,260
Cash Dividends on Common Stock (in millions)$1,576
 $1,396
 $1,281
 $1,305
 $1,034
Return on Average Common Equity (percent)(*)
11.71
 6.04
 12.15
 12.05
 11.92
Total Assets (in millions)$44,541
 $40,365
 $36,779
 $34,835
 $32,865
Gross Property Additions (in millions)$3,659
 $3,176
 $1,080
 $2,314
 $2,332
Capitalization (in millions):
        
Common stockholder's equity$15,065
 $14,323
 $11,931
 $11,356
 $10,719
Preferred and preference stock
 
 
 266
 266
Long-term debt10,791
 9,364
 11,073
 10,225
 9,616
Total (excluding amounts due within one year)$25,856
 $23,687
 $23,004
 $21,847
 $20,601
Capitalization Ratios (percent):
        
Common stockholder's equity58.3
 60.5
 51.9
 52.0
 52.0
Preferred and preference stock
 
 
 1.2
 1.3
Long-term debt41.7
 39.5
 48.1
 46.8
 46.7
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential2,253,188
 2,220,240
 2,185,782
 2,155,945
 2,127,658
Commercial315,328
 312,474
 308,939
 305,488
 302,891
Industrial10,622
 10,571
 10,644
 10,537
 10,429
Other9,819
 9,838
 9,766
 9,585
 9,261
Total2,588,957
 2,553,123
 2,515,131
 2,481,555
 2,450,239
Employees (year-end)6,938
 6,967
 6,986
 7,527
 7,989
(*)Georgia Power recorded a pre-tax estimated probable loss of $1.1 billion ($0.8 billion after tax) in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4.

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Georgia Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Residential$3,287
 $3,301
 $3,236
 $3,318
 $3,240
Commercial3,014
 3,023
 3,092
 3,077
 3,094
Industrial1,326
 1,344
 1,321
 1,291
 1,305
Other80
 84
 89
 86
 88
Total retail7,707
 7,752
 7,738
 7,772
 7,727
Wholesale — non-affiliates129
 163
 163
 175
 215
Wholesale — affiliates11
 24
 26
 42
 20
Total revenues from sales of electricity7,847
 7,939
 7,927
 7,989
 7,962
Other revenues561
 481
 383
 394
 364
Total$8,408
 $8,420
 $8,310
 $8,383
 $8,326
Kilowatt-Hour Sales (in millions):         
Residential28,201
 28,331
 26,144
 27,585
 26,649
Commercial32,818
 32,958
 32,155
 32,932
 32,719
Industrial23,163
 23,655
 23,518
 23,746
 23,805
Other518
 549
 584
 610
 632
Total retail84,700
 85,493
 82,401
 84,873
 83,805
Wholesale — non-affiliates2,646
 3,140
 3,277
 3,415
 3,501
Wholesale — affiliates335
 526
 800
 1,398
 552
Total87,681
 89,159
 86,478
 89,686
 87,858
Average Revenue Per Kilowatt-Hour (cents):         
Residential11.66
 11.65
 12.38
 12.03
 12.16
Commercial9.18
 9.17
 9.62
 9.34
 9.46
Industrial5.72
 5.68
 5.62
 5.44
 5.48
Total retail9.10
 9.07
 9.39
 9.16
 9.22
Wholesale4.70
 5.10
 4.64
 4.51
 5.80
Total sales8.95
 8.90
 9.17
 8.91
 9.06
Residential Average Annual
Kilowatt-Hour Use Per Customer
12,600
 12,849
 12,028
 12,864
 12,582
Residential Average Annual
Revenue Per Customer
$1,469
 $1,555
 $1,489
 $1,557
 $1,529
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
14,363
 15,308
 15,274
 15,274
 15,455
Maximum Peak-Hour Demand (megawatts):         
Winter14,394
 15,372
 13,894
 14,527
 15,735
Summer16,572
 15,748
 16,002
 16,244
 16,104
Annual Load Factor (percent)60.8
 64.5
 61.1
 61.9
 61.9
Plant Availability (percent):         
Fossil-steam81.0
 81.5
 85.0
 87.4
 85.6
Nuclear93.1
 95.0
 93.5
 95.6
 94.1
Source of Energy Supply (percent):         
Gas32.3
 29.1
 28.6
 28.2
 28.3
Nuclear17.4
 17.6
 17.8
 17.6
 17.6
Coal16.4
 21.1
 22.4
 26.4
 24.5
Hydro1.8
 1.9
 1.0
 1.1
 1.6
Other0.3
 0.3
 0.3
 
 
Purchased power —         
From non-affiliates11.3
 7.3
 7.8
 6.7
 5.0
From affiliates20.5
 22.7
 22.1
 20.0
 23.0
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019
Mississippi Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions)$1,264
 $1,265
 $1,187
 $1,163
 $1,138
Net Income (Loss) After Dividends
on Preferred Stock (in millions)
(a)(b)
$139
 $235
 $(2,590) $(50) $(8)
Return on Average Common Equity (percent)(a)(b)
8.54
 15.83
 (120.43) (1.87) (0.34)
Total Assets (in millions)$5,035
 $4,886
 $4,866
 $8,235
 $7,840
Gross Property Additions (in millions)$197
 $206
 $536
 $946
 $972
Capitalization (in millions):         
Common stockholder's equity$1,652
 $1,609
 $1,358
 $2,943
 $2,359
Redeemable preferred stock
 
 33
 33
 33
Long-term debt1,308
 1,539
 1,097
 2,424
 1,886
Total (excluding amounts due within one year)$2,960
 $3,148
 $2,488
 $5,400
 $4,278
Capitalization Ratios (percent):         
Common stockholder's equity55.8
 51.1
 54.6
 54.5
 55.1
Redeemable preferred stock
 
 1.3
 0.6
 0.8
Long-term debt44.2
 48.9
 44.1
 44.9
 44.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential154,205
 153,423
 153,115
 153,172
 153,158
Commercial33,552
 33,968
 33,992
 33,783
 33,663
Industrial444
 445
 452
 451
 467
Other189
 188
 173
 175
 175
Total188,390
 188,024
 187,732
 187,581
 187,463
Employees (year-end)1,030
 1,053
 1,242
 1,484
 1,478
(a)As a result of the Tax Reform Legislation, Mississippi Power recorded an income tax expense (benefit) of $(35) million and $372 million in 2018 and 2017, respectively.
(b)Pre-tax charges of $3.4 billion ($2.4 billion after tax) were recorded by Mississippi Power related to the suspension of the Kemper IGCC in 2017. Earnings in all periods presented were impacted by losses related to the Kemper IGCC.

Table of ContentsIndex to Financial Statements

SELECTED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Mississippi Power Company 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Residential$276
 $273
 $257
 $260
 $238
Commercial287
 286
 285
 279
 256
Industrial302
 321
 321
 313
 287
Other12
 9
 (9) 7
 (5)
Total retail877
 889
 854
 859
 776
Wholesale — non-affiliates237
 263
 259
 261
 270
Wholesale — affiliates132
 91
 56
 26
 76
Total revenues from sales of electricity1,246
 1,243
 1,169
 1,146
 1,122
Other revenues18
 22
 18
 17
 16
Total$1,264
 $1,265
 $1,187
 $1,163
 $1,138
Kilowatt-Hour Sales (in millions):         
Residential2,062
 2,113
 1,944
 2,051
 2,025
Commercial2,715
 2,797
 2,764
 2,842
 2,806
Industrial4,795
 4,924
 4,841
 4,906
 4,958
Other36
 37
 39
 39
 40
Total retail9,608
 9,871
 9,588
 9,838
 9,829
Wholesale — non-affiliates3,967
 3,980
 3,672
 3,920
 3,852
Wholesale — affiliates4,758
 2,584
 2,024
 1,108
 2,807
Total18,333
 16,435
 15,284
 14,866
 16,488
Average Revenue Per Kilowatt-Hour (cents):         
Residential13.39
 12.92
 13.22
 12.68
 11.75
Commercial10.57
 10.23
 10.31
 9.82
 9.12
Industrial6.30
 6.52
 6.63
 6.38
 5.79
Total retail9.13
 9.01
 8.91
 8.73
 7.90
Wholesale4.23
 5.39
 5.53
 5.71
 5.20
Total sales6.80
 7.56
 7.65
 7.71
 6.80
Residential Average Annual
Kilowatt-Hour Use Per Customer
13,391
 13,768
 12,692
 13,383
 13,242
Residential Average Annual
Revenue Per Customer
$1,795
 $1,780
 $1,680
 $1,697
 $1,556
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
3,516
 3,516
 3,628
 3,481
 3,561
Maximum Peak-Hour Demand (megawatts):         
Winter2,129
 2,763
 2,390
 2,195
 2,548
Summer2,310
 2,346
 2,322
 2,384
 2,403
Annual Load Factor (percent)64.6
 55.8
 63.1
 64.0
 60.6
Plant Availability Fossil-Steam (percent)89.1
 82.4
 89.1
 91.4
 90.6
Source of Energy Supply (percent):         
Gas91.7
 87.4
 90.4
 86.4
 82.3
Coal5.5
 6.9
 7.6
 8.1
 16.6
Purchased power —         
From non-affiliates2.1
 3.3
 (2.1) (2.0) (0.4)
From affiliates0.7
 2.4
 4.1
 7.5
 1.5
Total100.0
 100.0
 100.0
 100.0
 100.0

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017 2016 2015
Operating Revenues (in millions):         
Wholesale — non-affiliates$1,528
 $1,757
 $1,671
 $1,146
 $964
Wholesale — affiliates398
 435
 392
 419
 417
Total revenues from sales of electricity1,926
 2,192
 2,063
 1,565
 1,381
Other revenues12
 13
 12
 12
 9
Total$1,938
 $2,205
 $2,075
 $1,577
 $1,390
Net Income Attributable to
   Southern Power (in millions)(a)
$339
 $187
 $1,071
 $338
 $215
Cash Dividends
   on Common Stock (in millions)
$206
 $312
 $317
 $272
 $131
Return on Average Common Equity (percent)(a)
12.69
 4.62
 22.39
 9.79
 10.16
Total Assets (in millions)$14,300
 $14,883
 $15,206
 $15,169
 $8,905
Property, Plant, and Equipment
   In Service (in millions)
$13,270
 $13,271
 $13,755
 $12,728
 $7,275
Capitalization (in millions):         
Common stockholders' equity(b)
$2,368
 $2,968
 $5,138
 $4,430
 $2,483
Noncontrolling interests(b)
4,254
 4,316
 1,360
 1,245
 781
Redeemable noncontrolling interests
 
 
 164
 43
Long-term debt3,574
 4,418
 5,071
 5,068
 2,719
Total (excluding amounts due within one year)$10,196
 $11,702
 $11,569
 $10,907
 $6,026
Capitalization Ratios (percent):         
Common stockholders' equity(b)
23.2
 25.4
 44.4
 40.6
 41.2
Noncontrolling interests(b)
41.7
 36.9
 11.8
 11.4
 13.0
Redeemable noncontrolling interests
 
 
 1.5
 0.7
Long-term debt35.1
 37.7
 43.8
 46.5
 45.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Kilowatt-Hour Sales (in millions):         
Wholesale — non-affiliates36,358
 37,164
 35,920
 23,213
 18,544
Wholesale — affiliates12,928
 12,603
 12,811
 15,950
 16,567
Total49,286
 49,767
 48,731
 39,163
 35,111
Plant Nameplate Capacity
   Ratings (year-end) (megawatts)
12,247
 11,888
 12,940
 12,442
 9,808
Maximum Peak-Hour Demand (megawatts):         
Winter3,436
 2,867
 3,421
 3,469
 3,923
Summer4,460
 4,210
 4,224
 4,303
 4,249
Annual Load Factor (percent)49.8
 52.2
 49.1
 50.0
 49.0
Plant Availability (percent)98.8
 99.9
 99.9
 91.6
 93.1
Source of Energy Supply (percent):         
Natural gas69.5
 68.1
 67.7
 79.4
 89.5
Solar, Wind, and Biomass23.7
 23.6
 22.8
 12.1
 4.3
Purchased power —         
From non-affiliates6.1
 6.6
 7.8
 6.8
 4.7
From affiliates0.7
 1.7
 1.7
 1.7
 1.5
Total100.0
 100.0
 100.0
 100.0
 100.0
Employees (year-end)(c)
460
 491
 541
 
 
(a)As a result of the Tax Reform Legislation, Southern Power recorded an income tax expense (benefit) of $79 million and $(743) million in 2018 and 2017, respectively.
(b)See Note 15 to the financial statements under "Southern Power – Sales of Renewable Facility Interests" in Item 8 herein for additional information on 2018 changes in noncontrolling interests.
(c)Prior to December 2017, Southern Power had no employees but was billed for employee-related costs from SCS.

Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Successor(a)
  
Predecessor(a)
 2019 
2018(b)
 2017 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015
Operating Revenues (in millions)$3,792
 $3,909
 $3,920
 $1,652
  $1,905
 $3,941
Net Income Attributable to
Southern Company Gas
(in millions)
(c)
$585
 $372
 $243
 $114
  $131
 $353
Cash Dividends on Common Stock
(in millions)
$471
 $468
 $443
 $126
  $128
 $244
Return on Average Common Equity
(percent)
(c)
6.47
 4.23
 2.68
 1.74
  3.31
 9.05
Total Assets (in millions)$21,687
 $21,448
 $22,987
 $21,853
  $14,488
 $14,754
Gross Property Additions
(in millions)
$1,418
 $1,399
 $1,525
 $632
  $548
 $1,027
Capitalization (in millions):            
Common stockholders' equity$9,506
 $8,570
 $9,022
 $9,109
  $3,933
 $3,975
Long-term debt5,845
 5,583
 5,891
 5,259
  3,709
 3,275
Total (excluding amounts due within
one year)
$15,351
 $14,153
 $14,913
 $14,368
  $7,642
 $7,250
Capitalization Ratios (percent):            
Common stockholders' equity61.9
 60.6
 60.5
 63.4
  51.5
 54.8
Long-term debt38.1
 39.4
 39.5
 36.6
  48.5
 45.2
Total (excluding amounts due within
one year)
100.0
 100.0
 100.0
 100.0
  100.0
 100.0
Service Contracts (period-end)
 
 1,184,257
 1,198,263
  1,197,096
 1,205,476
Customers (period-end)            
Gas distribution operations4,277,219
 4,247,804
 4,623,249
 4,586,477
  4,544,489
 4,557,729
Gas marketing services630,682
 697,384
 773,984
 655,999
  630,475
 654,475
Total4,907,901
 4,945,188
 5,397,233
 5,242,476
  5,174,964
 5,212,204
Employees (period-end)4,446
 4,389
 5,318
 5,292
  5,284
 5,203
(a)As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
(c)As a result of the Tax Reform Legislation, Southern Company Gas recorded income tax expense of $93 million in 2017.

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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2015-2019 (continued)
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Successor(a)
  
Predecessor(a)
 2019 
2018(b)
 2017 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015
Operating Revenues (in millions)            
Residential$1,737
 $1,886
 $2,100
 $899
  $1,101
 $2,129
Commercial485
 546
 641
 260
  310
 617
Transportation907
 944
 811
 269
  290
 526
Industrial121
 140
 159
 74
  72
 203
Other542
 393
 209
 150
  132
 466
Total$3,792
 $3,909
 $3,920
 $1,652
  $1,905
 $3,941
Heating Degree Days:            
Illinois6,136
 6,101
 5,246
 1,903
  3,340
 5,433
Georgia2,157
 2,588
 1,970
 727
  1,448
 2,204
Gas Sales Volumes
(mmBtu in millions):
            
Gas distribution operations            
Firm677
 721
 667
 274
  396
 695
Interruptible92
 95
 95
 47
  49
 99
Total769
 816
 762
 321
  445
 794
Gas marketing services            
Firm:            
Georgia33
 37
 32
 13
  21
 35
Illinois12
 13
 12
 4
  8
 13
Other15
 20
 18
 5
  7
 11
Interruptible large commercial and
industrial
14
 14
 14
 6
  8
 14
Total74
 84
 76
 28
  44
 73
Market share in Georgia (percent)28.9
 29.0
 29.2
 29.4
  29.3
 29.7
Wholesale gas services            
Daily physical sales (mmBtu in
millions/day
)
6.4
 6.7
 6.4
 7.2
  7.6
 6.8
(a)As a result of the Merger, pushdown accounting was applied to create a new cost basis for Southern Company Gas' assets, liabilities, and equity as of the acquisition date. Accordingly, the successor financial statements reflect the new basis of accounting, and successor and predecessor period financial results are presented but are not comparable.
(b)During 2018, Southern Company Gas completed the Southern Company Gas Dispositions. See Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.


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Item 7.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 Page
Combined Management's Discussion and Analysis of Financial Condition and Results of Operations
This section generally discusses 2019 and 2018 items and year-to-year comparisons between 2019 and 2018. Discussions of 2017 items and year-to-year comparisons between 2018 and 2017 that are not included in this Annual Report on Form 10-K can be found in Item 7 of each Registrant's Annual Report on Form 10-K for the year ended December 31, 2018, which was filed with the SEC on February 19, 2019. The following Management's Discussion and Analysis of Financial Condition and Results of Operations is a combined presentation; however, information contained herein relating to any individual Registrant is filed by such Registrant on its own behalf and each Registrant makes no representation as to information related to the other Registrants.
Item 7A.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
See MANAGEMENT'S DISCUSSION AND ANALYSIS – FINANCIAL CONDITION AND LIQUIDITY – "Market"Market Price Risk" of each of the registrantsRisk" in Item 7 herein and Note 1 of each ofto the registrant's financial statements under "Financial Instruments""Financial Instruments" in Item 8 herein. See also Note 10Also see Notes 13 and 14 to the financial statements of Southern Company, Alabama Power, and Georgia Power, Note 9 to the financial statements of Gulf Power, Mississippi Power, and Southern Company Gas, and Note 8 to the financial statements of Southern Power in Item 8 herein.
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Item 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

INDEX TO 2016 FINANCIAL STATEMENTS
Page
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Page
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Item 9.CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
None.
Item 9A.CONTROLS AND PROCEDURES
Disclosure Controls And Procedures.
As of the end of the period covered by this Annual Report on Form 10-K, Southern Company, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power, and Southern Company Gas conducted separate evaluations under the supervision and with the participation of each company's management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended). Based upon these evaluations, the Chief Executive Officer and the Chief Financial Officer, in each case, concluded that the disclosure controls and procedures are effective.
Internal Control Over Financial Reporting.
(a) Management's Annual Report on Internal Control Over Financial Reporting.
Management's Report on Internal Control Over Financial ReportingPage
(b) Attestation Report of the Registered Public Accounting Firm.
The report of Deloitte & Touche LLP, Southern Company's independent registered public accounting firm, regarding Southern Company's Internal Control over Financial Reporting is included on page II-9 of this Form 10-K. This report is not applicable to Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power, and Southern Company Gas as these companies are not accelerated filers or large accelerated filers.
(c) Changes in internal control over financial reporting.
Other than the changes resulting from the Merger discussed below, there have been no changes in Southern Company's, Alabama Power's, Georgia Power's, Gulf Power's, Mississippi Power's, Southern Power's, or Southern Company Gas' internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended) during the fourth quarter 2016 that have materially affected or are reasonably likely to materially affect Southern Company's, Alabama Power's, Georgia Power's, Gulf Power's, Mississippi Power's, Southern Power's, or Southern Company Gas' internal control over financial reporting.
Southern Company completed the Merger on July 1, 2016 with Southern Company Gas surviving the Merger as a wholly-owned, direct subsidiary of Southern Company. Southern Company has completed an internal controls review during the fourth quarter 2016 pursuant to Section 404 of the Sarbanes-Oxley Act of 2002.
Item 9B.OTHER INFORMATION
None.
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THE SOUTHERN COMPANY
COMBINED MANAGEMENT'S DISCUSSION AND SUBSIDIARY COMPANIES
FINANCIAL SECTION

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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTINGANALYSIS
Southern Company and Subsidiary Companies 20162019 Annual Report
The management of The Southern Company (Southern Company) is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Company's internal control over financial reporting was effective as of December 31, 2016.
Deloitte & Touche LLP, an independent registered public accounting firm, as auditors of Southern Company's financial statements, has issued an attestation report on the effectiveness of Southern Company's internal control over financial reporting as of December 31, 2016. Deloitte & Touche LLP's report on Southern Company's internal control over financial reporting is included herein.
/s/ Thomas A. Fanning
Thomas A. Fanning
Chairman, President, and Chief Executive Officer
/s/ Art P. Beattie
Art P. Beattie
Executive Vice President and Chief Financial Officer
February 21, 2017

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors and Stockholders of
The Southern Company
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of The Southern Company and Subsidiary Companies (the Company) as of December 31, 2016 and 2015, and the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2016. We also have audited the Company's internal control over financial reporting as of December 31, 2016, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. The Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting (page II-8). Our responsibility is to express an opinion on these financial statements and an opinion on the Company's internal control over financial reporting based on our audits.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.
A company's internal control over financial reporting is a process designed by, or under the supervision of, the company's principal executive and principal financial officers, or persons performing similar functions, and effected by the company's board of directors, management, and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
In our opinion, the consolidated financial statements (pages II-59 to II-147) referred to above present fairly, in all material respects, the financial position of Southern Company and Subsidiary Companies as of December 31, 2016 and 2015, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2016, based on the criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.
As discussed in Note 3 to the financial statements, the Mississippi Public Service Commission rate recovery process associated with the Kemper Integrated Coal Gasification Combined Cycle Project may have a material impact on the Company's financial statements.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017

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DEFINITIONS
TermMeaning
2012 MPSC CPCN OrderA detailed order issued by the Mississippi PSC in April 2012 confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing acquisition, construction, and operation of the Kemper IGCC
2013 ARPAlternative Rate Plan approved by the Georgia PSC in 2013 for Georgia Power for the years 2014 through 2016 and subsequently extended through 2019
AFUDCAllowance for funds used during construction
Alabama PowerAlabama Power Company
AROAsset retirement obligation
ASCAccounting Standards Codification
ASUAccounting Standards Update
Atlanta Gas LightAtlanta Gas Light Company, a wholly-owned subsidiary of Southern Company Gas
Baseload ActState of Mississippi legislation designed to enhance the Mississippi PSC's authority to facilitate development and construction of baseload generation in the State of Mississippi
CCRCoal combustion residuals
Clean Air ActClean Air Act Amendments of 1990
CO2
Carbon dioxide
CODCommercial operation date
CPCNCertificate of public convenience and necessity
CWIPConstruction work in progress
DOEU.S. Department of Energy
EPAU.S. Environmental Protection Agency
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
FFBFederal Financing Bank
GAAPU.S. generally accepted accounting principles
Georgia PowerGeorgia Power Company
Gulf PowerGulf Power Company
IGCCIntegrated coal gasification combined cycle
IRSInternal Revenue Service
ITCInvestment tax credit
Kemper IGCCIGCC facility under construction by Mississippi Power in Kemper County, Mississippi
KWHKilowatt-hour
LIBORLondon Interbank Offered Rate
MergerThe merger, effective July 1, 2016, of a wholly-owned, direct subsidiary of Southern Company with and into Southern Company Gas, with Southern Company Gas continuing as the surviving corporation
Mirror CWIPA regulatory liability used by Mississippi Power to record customer refunds resulting from a 2015 Mississippi PSC order
Mississippi PowerMississippi Power Company
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MPUSMississippi Public Utilities Staff
MWMegawatt
natural gas distribution utilitiesSouthern Company Gas' seven natural gas distribution utilities (Nicor Gas, Atlanta Gas Light, Virginia Natural Gas, Inc., Elizabethtown Gas, Florida City Gas, Chattanooga Gas Company, and Elkton Gas)
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DEFINITIONS
(continued)

TermMeaning
NCCRGeorgia Power's Nuclear Construction Cost Recovery
NDRAlabama Power's Natural Disaster Reserve
Nicor GasNorthern Illinois Gas Company, a wholly-owned subsidiary of Southern Company Gas
NRCU.S. Nuclear Regulatory Commission
OCIOther comprehensive income
Plant Vogtle Units 3 and 4Two new nuclear generating units under construction at Georgia Power's Plant Vogtle
PowerSecurePowerSecure, Inc.
power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PPAPower purchase agreements and contracts for differences that provide the owner of a renewable facility a certain fixed price for the electricity sold to the grid
PSCPublic Service Commission
PTCProduction tax credit
Rate CNPAlabama Power's Rate Certificated New Plant
Rate CNP ComplianceAlabama Power's Rate Certificated New Plant Compliance
Rate CNP PPAAlabama Power's Rate Certificated New Plant Power Purchase Agreement
Rate ECRAlabama Power's Rate Energy Cost Recovery
Rate NDRAlabama Power's Rate Natural Disaster Reserve
Rate RSEAlabama Power's Rate Stabilization and Equalization plan
ROEReturn on equity
S&PS&P Global Ratings, a division of S&P Global Inc.
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
SEGCOSouthern Electric Generating Company
SMEPASouth Mississippi Electric Power Association (now known as Cooperative Energy)
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiaries
Southern Company Gas CapitalSouthern Company Gas Capital Corporation (formerly known as AGL Capital Corporation), a 100%-owned subsidiary of Southern Company Gas
Southern Company systemThe Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SEGCO, Southern Nuclear, SCS, Southern LINC, PowerSecure (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.
Southern PowerSouthern Power Company and its subsidiaries
traditional electric operating companiesAlabama Power, Georgia Power, Gulf Power, and Mississippi Power
WestinghouseWestinghouse Electric Company LLC
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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southern Company and Subsidiary Companies 2016 Annual Report

OVERVIEW
Business Activities
The Southern Company (Southern Company or the Company) is a holding company that owns all of the common stock of thethree traditional electric operating companies, andas well as the parent entities of Southern Power and Southern Company Gas, and owns other direct and indirect subsidiaries. The primary businessbusinesses of the Southern Company system isare electricity sales by the traditional electric operating companies and Southern Power and following the closing of the Merger on July 1, 2016, the distribution of natural gas by Southern Company Gas. The fourSouthern Company's reportable segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas.
The traditional electric operating companies – Alabama Power, Georgia Power, and Mississippi Power – are vertically integrated utilities providing electric service to retail customers in fourthree Southeastern states. states in addition to wholesale customers in the Southeast.
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
Southern Company Gas distributesis an energy services holding company whose primary business is the distribution of natural gas through thegas. Southern Company Gas owns natural gas distribution utilities in sevenfour states – Illinois, Georgia, Virginia, and Tennessee – and is also involved in several other complementary businesses includingbusinesses. Southern Company Gas manages its business through four reportable segments – gas distribution operations, gas pipeline investments, wholesale gas services, which includes Sequent, a natural gas asset optimization company, and gas marketing services, wholesalewhich includes SouthStar, a provider of energy-related products and services to natural gas services,markets – and gas midstream operations.one non-reportable segment, all other. See Notes 7 and 16 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of the Southern Company system's electricityelectric service and natural gas businesses. These factors include the ability to maintain constructive regulatory environments, to maintain and grow sales and customers, and to effectively manage and secure timely recovery of prudently-incurred costs. These costs include those related to projected long-term demand growth,growth; stringent environmental standards, including CCR rules; safety; system reliability fuel,and resilience; fuel; natural gas; restoration following major storms,storms; and capital expenditures, including constructing new electric generating plants and expanding and improving the electric transmission and distribution systems,electric and updating and expanding the natural gas distribution systems.
Construction continues on Plant Vogtle Units 3 and 4 (45.7% ownership interest by Georgia Power in the two units, each with approximately 1,100 MWs) and Mississippi Power's 582-MW Kemper IGCC. See Note 3 to the financial statements under "Regulatory MattersGeorgia PowerNuclear Construction" and "Integrated Coal Gasification Combined Cycle" for additional information.
The traditional electric operating companies and natural gas distribution utilities have various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Southern Company system for the foreseeable future. See Note 32 to the financial statements under "Regulatory Matters" and "Integrated Coal Gasification Combined Cycle" for additional information.
Another major factor affecting
Southern Power's future earnings will depend upon the Southern Company system's businesses is the profitabilityparameters of the competitive market-basedwholesale market and the efficient operation of its wholesale generating business.assets, as well as Southern Power's ability to execute its growth strategy isand to develop and construct acquire, own, manage,generating facilities. In addition, Southern Power's future earnings will depend upon the availability of federal and sell power generation assets, includingstate ITCs and PTCs on its renewable energy projects, which could be impacted by future tax legislation. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions," "Construction Programs," and "Income Tax Matters" herein and Notes 10 and 15 to enter into PPAs primarily with investor-owned utilities, independent power producers, municipalities, and other load-serving entities.the financial statements for additional information.
Southern Company's other business activities include providing energy technologies and servicessolutions to electric utilities and large industrial, commercial, institutional, and municipal customers. Customer solutions includetheir customers in the areas of distributed generation, systems, utility infrastructure solutions,energy storage and renewables, and energy efficiency products and services.efficiency. Other business activities also include investments in telecommunications, leveraged lease projects, and gas storage facilities. Management continues to evaluate the contribution of each of these activities to total shareholder return and may pursue acquisitions, dispositions, and other strategic ventures or investments accordingly.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Recent Developments
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax).
Alabama Power
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, as well as the acquisition of an existing combined cycle facility for a total capital investment of approximately $1.1 billion. The related costs would be recovered through existing rate mechanisms. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama Power" herein for additional information.
Georgia Power
Rate Case
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, including estimated rate increases totaling $342 million, $181 million, and $386 million effective January 1, 2020, January 1, 2021, and January 1, 2022, respectively. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans2019 ARP" herein for additional information.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric generating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its total project capital cost forecast to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds), with respect to Georgia Power's ownership interest. As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. Following the vote to continue construction, Georgia Power entered into agreements to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and to provide funding with respect to a MEAG Power wholly-owned subsidiary's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics. In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4.
In March 2019, Georgia Power entered into the Amended and Restated Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4, up to approximately $5.130 billion. At December 31, 2019, Georgia Power had a total of $3.8 billion of borrowings outstanding under the related multi-advance credit facilities.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein and Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million related to the Kemper County energy facility, which was suspended in 2017, primarily associated with the expected close out of a DOE contract related to the Kemper County energy facility, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In December 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. Mine reclamation activities are expected to be substantially completed in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion, and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy Facility" and Note 3 to the financial statements for additional information, including remaining contingencies related to the Kemper IGCC.
On November 26, 2019, Mississippi Power filed a base rate case (Mississippi Power 2019 Base Rate Case) with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a 53% average equity ratio and a 7.728% return on investment. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under "Mississippi Power2019 Base Rate Case" for additional information.
Southern Power
During 2019, Southern Power completed construction and achieved commercial operation of the 100-MW Wildhorse Mountain wind facility, acquired and continued construction of the 136-MW Skookumchuck wind facility, and continued construction of the 200-MW Reading wind facility. In addition, Southern Power acquired a majority interest in DSGP, an affiliate of Bloom Energy, that owns and operates fuel cell generation facilities, for a total purchase price of approximately $167 million.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments.
Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Power" and Construction ProgramsSouthern Power" herein for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
During 2019, the natural gas distribution utilities have been involved in the following regulatory proceedings:
On September 25, 2019, the Virginia Commission approved Virginia Natural Gas' Steps to Advance Virginia's Energy (SAVE) program request to amend and extend the program through 2024 with estimated capital spend totaling approximately $365 million.
On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase for Nicor Gas, including $65 million related to the recovery of investments under the Investing in Illinois program, which became effective October 8, 2019.
On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase for Atlanta Gas Light, effective January 1, 2020.
See FUTURE EARNINGS POTENTIAL – "Regulatory MattersSouthern Company GasRate Proceedings" herein and Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
Also during 2019, Southern Company Gas recorded a pre-tax impairment charge of $91 million ($69 million after tax) related to a natural gas storage facility in Louisiana. See Note 3 to the financial statements under "Other MattersSouthern Company Gas" for additional information.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Company Gas" herein for information regarding Southern Company Gas' 2018 disposition activity.
Key Performance Indicators
In striving to achieve attractive risk-adjusted returns while providing cost-effective energy to more than nineeight million electric and gas utility customers collectively, the traditional electric operating companies and Southern Company system continuesGas continue to focus on several key performance indicators. These indicators include, but are not limited to, customer satisfaction, plant availability, electric and natural gas system reliability, and execution of major construction projects,projects. In addition, Southern Company and the Subsidiary Registrants focus on earnings per share (EPS). and net income, respectively, as a key performance indicator. See RESULTS OF OPERATIONS herein for information on the Registrants' financial performance. See RESULTS OF OPERATIONS – "Southern Company'sCompany GasOperating Metrics" for additional information on Southern Company Gas' operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
The financial success of the traditional electric operating companies and Southern Company Gas is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management usesThe traditional electric operating companies use customer satisfaction surveys to evaluate their results and reliabilitygenerally target the top quartile of these surveys in measuring performance. Reliability indicators are also used to evaluate results. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate RSE" and " – Mississippi PowerPerformance Evaluation Plan" herein for additional information on Alabama Power's Rate RSE and Mississippi Power's PEP rate plan, respectively, both of which contain mechanisms that directly tie customer service indicators to the allowed equity return.
Southern Power continues to focus on several key performance indicators, including, but not limited to, the equivalent forced outage rate and contract availability to evaluate theoperating results of the Southern Company system.and help ensure its ability to meet its contractual commitments to customers.
See RESULTS OF OPERATIONS herein for information on the Company's financial performance.
Merger with Southern Company Gas
On July 1, 2016, Southern Company completed the Merger for a total purchase price of approximately $8.0 billion and Southern Company Gas became a wholly-owned, direct subsidiary of Southern Company.
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Southern Company and Subsidiary Companies 20162019 Annual Report



Prior to the completion of the Merger, Southern Company and Southern Company Gas operated as separate companies. The discussion and analysis of results of operations and financial condition set forth herein includes Southern Company Gas' results of operations since July 1, 2016 and financial condition as of December 31, 2016. See Note 12 to the financial statements under "Southern CompanyMerger with Southern Company Gas" for additional information regarding the Merger.
During 2016 and 2015, the Company recorded in its statements of income costs associated with the Merger of approximately $111 million and $41 million, respectively, of which $80 million and $27 million is included in operating expenses and $31 million and $14 million is included in other income and (expense), respectively. These costs include external transaction costs for financing, legal, and consulting services, as well as customer rate credits and additional compensation-related expenses.RESULTS OF OPERATIONS
EarningsSouthern Company
Consolidated net income attributable to Southern Company was $2.4$4.7 billion in 2016,2019, an increase of $81 million,$2.5 billion, or 3.4%112.9%, from the prior year. Consolidated net income increased by $114 million as a result of earnings from Southern Company Gas, which was acquired on July 1, 2016. Also contributing to the increase were higher retail electric revenues resulting from non-fuel retail rate increases and warmer weather, primarily in the third quarter 2016, as well as the 2015 correction of a Georgia Power billing error, partially offset by accruals in 2016 for expected refunds at Alabama Power and Georgia Power. Additionally, the increase was due to increases in income tax benefits and renewable energy sales at Southern Power. These increases were partially offset by higher interest expense, non-fuel operations and maintenance expenses, depreciation and amortization, lower wholesale capacity revenues, and higher estimated losses associated with the Kemper IGCC. See Note 12 to the financial statements under "Southern CompanyMerger with Southern Company Gas" for additional information regarding the Merger.
Consolidated net income attributable to Southern Company was $2.4 billion in 2015, an increase of $404 million, or 20.6%, from the prior year. The increase was primarily due to the $2.6 billion ($1.4 billion after tax) gain on the sale of Gulf Power in 2019 and a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to lower pre-tax charges of $365 million ($226 million after tax) recorded in 2015 compared to pre-tax charges of $868 million ($536 million after tax) recorded in 2014 for revisions of the estimated costs expected to be incurred on MississippiGeorgia Power's construction of Plant Vogtle Units 3 and 4. See "Electricity BusinessEstimated Loss on Plants Under Construction" herein and Notes 2 and 15 to the Kemper IGCCfinancial statements under "Georgia PowerNuclear Construction" and an increase in retail base rates. The increases were partially offset by increases in non-fuel operations and maintenance expenses and depreciation and amortization."Southern Company," respectively, for additional information.
Basic EPS was $2.57$4.53 in 2016, $2.602019 and $2.18 in 2015, and $2.19 in 2014.2018. Diluted EPS, which factors in additional shares related to stock-based compensation, was $2.55$4.50 in 2016, $2.592019 and $2.17 in 2015, and $2.18 in 2014.2018. EPS for 20162019 and 2018 was negatively impacted by $0.12$0.11 and $0.04 per share, respectively, as a result of an increaseincreases in the average shares outstanding. See FINANCIAL CONDITION AND LIQUIDITYNote 8 to the financial statements under "Outstanding Classes of Capital Stock"Financing Activities" hereinSouthern Company" for additional information.
Dividends
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.2225$2.46 in 2016, $2.15252019 and $2.38 in 2015, and $2.0825 in 2014.2018. In January 2017,2020, Southern Company declared a quarterly dividend of 5662 cents per share. This is the 277th consecutive quarter that Southern Company has paid a dividend equal to or higher than the previous quarter. For 2016,2019, the dividend payout ratio was 86%.54% compared to 109% for 2018. The decrease was due to the increase in earnings in 2019.
RESULTS OF OPERATIONS
Discussion of theSouthern Company's results of operations is divided into three parts – the Southern Company system's primary business of electricity sales, its gas business, and its other business activities.
 Amount
 2016 2015 2014
 (in millions)
Electricity business$2,571
 $2,401
 $1,969
Gas business114
 
 
Other business activities(237) (34) (6)
Net Income$2,448
 $2,367
 $1,963
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Southern Company and Subsidiary Companies 2016 Annual Report


 2019 2018
 (in millions)
Electricity business$3,268
 $2,304
Gas business585
 372
Other business activities886
 (450)
Net Income$4,739
 $2,226
Electricity Business
Southern Company's electric utilities generate and sell electricity to retail and wholesale customers primarily incustomers. The results of operations discussed below include the Southeast.results of Gulf Power through December 31, 2018. See Note 15 to the financial statements under "Southern Company" for additional information.
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Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income for the electricity business follows:
Amount 
Increase (Decrease)
from Prior Year
2016 2016 20152019 
Increase
(Decrease)
from 2018
(in millions)(in millions)
Electric operating revenues$17,941
 $499
 $(964)$17,095
 $(1,476)
Fuel4,361
 (389) (1,255)3,622
 (1,015)
Purchased power750
 105
 (27)816

(155)
Cost of other sales58
 58
 
76
 10
Other operations and maintenance4,523
 231
 33
4,479
 (156)
Depreciation and amortization2,233
 213
 91
2,472
 (93)
Taxes other than income taxes1,039
 44
 16
1,011
 (87)
Estimated loss on Kemper IGCC428
 63
 (503)
Estimated loss on plants under construction24
 (1,073)
Impairment charges3
 (153)
(Gain) loss on dispositions, net(21) (21)
Total electric operating expenses13,392
 325
 (1,645)12,482
 (2,743)
Operating income4,549
 174
 681
4,613
 1,267
Allowance for equity funds used during construction200
 (26) (19)121
 (10)
Interest expense, net of amounts capitalized931
 157
 (20)987
 (48)
Other income (expense), net(75) (43) 23
234
 90
Income taxes1,091
 (235) 273
708
 501
Net income2,652
 183
 432
3,273
 894
Less:        
Dividends on preferred and preference stock of subsidiaries45
 (9) (14)15
 (1)
Net income attributable to noncontrolling interests36
 22
 14
Net income (loss) attributable to noncontrolling interests(10) (69)
Net Income Attributable to Southern Company$2,571
 $170
 $432
$3,268
 $964
Electric Operating Revenues
Electric operating revenues for 2019 were $17.1 billion, reflecting a $1.5 billion decrease from 2018. Details of electric operating revenues were as follows:
 2019 2018
 (in millions)
Retail electric — prior year$15,222
  
Estimated change resulting from —   
Rates and pricing581
  
Sales decline(143)  
Weather29
  
Fuel and other cost recovery(392)  
Gulf Power disposition(1,213)  
Retail electric — current year14,084
 $15,222
Wholesale electric revenues2,152
 2,516
Other electric revenues636
 664
Other revenues223
 169
Electric operating revenues$17,095
 $18,571
Percent change(7.9)% 0.2%
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report


Electric Operating Revenues
Electric operating revenues for 2016 were $17.9 billion, reflecting a $499 million increase from 2015. Details of electric operating revenues were as follows:
 Amount
 2016 2015
 (in millions)
Retail electric — prior year$14,987
 $15,550
Estimated change resulting from —   
Rates and pricing427
 375
Sales growth (decline)(35) 50
Weather153
 (59)
Fuel and other cost recovery(298) (929)
Retail electric — current year15,234
 14,987
Wholesale electric revenues1,926
 1,798
Other electric revenues698
 657
Other revenues83
 
Electric operating revenues$17,941
 $17,442
Percent change2.9% (5.2)%

Retail electric revenues increased $247 million,decreased $1.1 billion, or 1.6%7.5%, in 20162019 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 20162019 was primarily due to increasesthe impacts of Alabama Power's customer bill credits issued in base tariffs at Georgia Power under2018 related to the 2013 ARP and the NCCR tariff and increased revenues at Alabama Power underTax Reform Legislation, additional capital investments recovered through Rate CNP Compliance, all effective January 1, 2016. Also contributing to the increaseand lower Rate RSE customer refund in rates and pricing for 2016 was the 2015 correction of an error affecting billings since 2013 to a small number of large commercial and industrial customers under a rate plan allowing for variable demand-driven pricing at Georgia Power and the implementation of rates at Mississippi Power for certain Kemper IGCC in-service assets, effective September 2015. These increases were partially offset by accruals in 2016 for expected refunds at Alabama Power and Georgia Power.
Retail electric revenues decreased $563 million, or 3.6%, in 20152019 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 2015 was primarily due to increased revenues at Alabama Power, associated with an increase in rates under Rate RSE, and atyear; Georgia Power, related to increases in base tariffs under the 2013 ARP and the NCCR tariff, all effective January 1, 2015, as well asPower's higher contributions from variable demand-driven pricing from commercial and industrial customers. The increase in rates and pricing was also due to the implementation of rates at Mississippi Power for certain Kemper IGCC in-service assets, effective September 2015. The increase was partially offset by the 2015 correction of an error affecting billings since 2013 to a small number of large commercial and industrial customers under a rate plan allowing forwith variable demand-driven pricing, at Georgia Power.
See Note 3NCCR rate increase effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018; and Mississippi Power's PEP and ECO Plan rate increases effective for the financial statements under "Regulatory MattersAlabama PowerRate RSE" and " – Rate CNP Compliance" and " – Georgia PowerRate Plans" and " – Nuclear Construction" and "Integrated Coal Gasification Combined CycleRate Recoveryfirst billing cycle of Kemper IGCC Costs" and Note 1 to the financial statements under "General" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.September 2018.
Electric rates for the traditional electric operating companies include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of PPA costs, and do not affect net income. The traditional electric operating companies each have one or more regulatory mechanisms to recover other costs such as environmental and other compliance costs, storm damage, new plants, and PPA capacity costs.
See Note 2 to the financial statements under "Alabama Power," "Georgia Power," and "Mississippi Power" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Wholesale electric revenues consist of PPAs primarily with investor-owned utilities and electric cooperatives and short-term opportunity sales. Wholesale electric revenues from PPAs (other than solar and wind PPAs) have both capacity and energy components. Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment. Energy revenues will vary depending on fuel prices, the market prices of wholesale energy compared to the Southern Company system's generation, demand for energy within the Southern Company system's
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. ElectricityEnergy sales from solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or through a fixed price for electricity.related to the energy. As a result, the Company's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Wholesale electric revenues at Mississippi Power include FERC-regulated municipal and rural associationMRA sales as well as market-based sales. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Southern Company system's variable cost to produce the energy.
Wholesale electric revenues from power sales were as follows:
2016 2015 20142019 2018
(in millions)(in millions)
Capacity and other$771
 $875
 $974
$529
 $620
Energy1,155
 923
 1,210
1,623
 1,896
Total$1,926
 $1,798
 $2,184
$2,152
 $2,516
In 2016,2019, wholesale revenues increased $128decreased $364 million, or 7.1%14.5%, as compared to the prior year due to a $232decreases of $273 million increase in energy revenues offset by a $104and $91 million decrease in capacity revenues. The increase inExcluding the $28 million decrease associated with the sale of Gulf Power, energy revenues decreased $165 million at Southern Power and $80 million at the traditional electric operating companies. The decrease at Southern Power related to a $113 million decrease primarily in non-PPA short-term sales and a decrease in the market price of energy, as well as a $51 million decrease primarily in sales under PPAs from natural gas facilities. The decrease at the traditional electric operating companies was primarily due to an increase in short-term sales and renewable energy sales at Southernlower natural gas prices. Excluding the $26 million decrease associated with the sale of Gulf Power, partially offset by lower fuel prices. Thethe decrease in capacity revenues was primarily duerelated to the expirationsales of wholesale contracts at Georgia PowerSouthern Power's Plant Oleander and Gulf Power,Plant Stanton Unit A (together, the eliminationFlorida Plants) in consolidation of aDecember 2018 and Southern Power PPA that was remarketed from a third party to Georgia PowerPower's Plant Nacogdoches in January 2016, and unit retirements at Georgia Power, partially offset by an increase due to a new wholesale contract at Alabama Power in the first quarter 2016.
In 2015, wholesale revenues decreased $386 million, or 17.7%, as comparedJune 2019. See Note 15 to the prior year due to a $287 million decrease in energy revenues and a $99 million decrease in capacity revenues. The decreases in energy revenues were primarily related to lower fuel costs and lower customer demand due to milder weather as compared to the prior year, partially offset by increases in energy revenues from new solar and wind PPAs at Southern Power. The decreases in capacity revenues were primarily due to the expiration of wholesale contracts in December 2014 at Georgia Power, unit retirements at Georgia Power, and PPA expirations at Southern Power.
See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGulf Power"financial statements for information regarding the expiration of long-term sales agreements at Gulf Power for Plant Scherer Unit 3, which will impact future wholesale earnings, and Gulf Power's request to rededicate its ownership interest in Scherer Unit 3 to the retail jurisdiction.additional information.
Other Electric Revenues
Other electric revenues increased $41decreased $28 million, or 6.2%, and decreased $15 million, or 2.2%4.2%, in 2016 and 2015, respectively,2019 as compared to the prior years.year. The 2016 increase was primarily due to a $14 million increase in customer temporary facilities services revenues and a $12 million increase in outdoor lighting revenues at Georgia Power. The 2015 decrease was primarily due to a $16decrease of $66 million decrease in transmission revenues at Georgia Power primarily as a resultrelated to the sale of a contract that expired in December 2014 and a $13 million decrease in co-generation steam revenues at AlabamaGulf Power, partially offset by anincreases at Georgia Power of $13 million in regulated power delivery construction and maintenance contracts and $11 million increase infrom outdoor lighting revenuesLED conversions and sales, as well as an increase at Georgia Power.Alabama Power of $9 million from pole attachment agreements.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report



Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 20162019 and the percent change from the prior year were as follows:
2019
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
      
Adjusted(b)
2016 2016 2015 
2016(*)
 
2015(*)
Total
KWHs
 Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
(a)
 Total KWH Percent Change 
Weather-Adjusted Percent Change(a)
(in billions)        (in billions)        
Residential53.3
 2.3 % (2.3)% 0.2 % 0.4 %48.5
 (11.1)% (10.7)% (1.1)% (0.8)%
Commercial53.7
 0.4
 0.5
 (1.0) 0.9
49.1
 (8.1) (8.6) (1.1) (1.6)
Industrial52.8
 (2.1) (0.4) (2.2) (0.3)50.1
 (6.1) (6.1) (2.9) (2.9)
Other0.9
 (1.7) (1.4) (1.7) (1.3)0.8
 (9.1) (9.0) (5.8) (5.7)
Total retail160.7
 0.2
 (0.7) (1.0)% 0.3 %148.5
 (8.5) (8.4)% (1.7) (1.8)%
Wholesale34.9
 14.4
 (7.0)    48.0
 (3.9)   (2.6)  
Total energy sales195.6
 2.4 % (1.8)%    196.5
 (7.4)%   (1.9)%  
(*)(a)In the first quarter 2015, Mississippi Power updated the methodology to estimate the unbilled revenue allocation among customer classes. This change did not have a significant impact on net income. TheWeather-adjusted KWH sales variancesare estimated by removing from KWH sales the effect of deviations from normal temperature conditions, based on statistical models of the historical relationship between temperatures and energy sales. Normal temperature conditions are defined as those experienced in the above table reflect an adjustmentapplicable service territory over a specified historical period. This metric is useful because it allows trends in historical operations to be evaluated apart from the influence of weather conditions. Management also considers this metric in developing long-term capital and financial plans.
(b)Kilowatt-hour sales comparisons to the estimated allocationprior year were significantly impacted by the disposition of Mississippi Power's unbilled 2014 and first quarter 2015 KWH sales among customer classes that is consistent with the actual allocation in 2015 and 2016, respectively. Without this adjustment, 2016 weather-adjusted commercial sales decreased 0.9% and industrial KWH sales decreased 2.1% as compared to 2015. Without this adjustment, 2015 weather-adjusted commercial sales increased 0.8% and industrial KWH sales decreased 0.4% as compared to 2014.Gulf Power on January 1, 2019. These changes exclude Gulf Power.
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. RetailExcluding the impact of the Gulf Power disposition on January 1, 2019, weather-adjusted retail energy sales increased 261 milliondecreased 2.7 billion KWHs in 20162019 as compared to the prior year. This increase wasyear primarily due to warmer weather in the third quarter 2016 as compared to the corresponding period in 2015 and customer growth, partially offset by decreasedlower customer usage. The decrease in industrial KWH energy sales wasWeather-adjusted residential usage decreases are primarily dueattributable to decreased sales in the primary metals, chemicals, paper, pipeline, and stone, clay, and glass sectors. A strong dollar, low oil prices, and weak global economic conditions constrained growth in the industrial sector in 2016. Weather-adjusted commercial KWH sales decreased primarily due to decreased customer usage resulting from an increase in electronic commerce transactionsenergy-efficient residential appliances and energy saving initiatives, partially offset by customer growth. Weather-adjusted residential KWH sales increasedcommercial usage decreases are primarily dueattributable to customer growth, partially offset by decreased customer usage primarily resulting from an increase in multi-family housingenergy saving initiatives and efficiency improvements in residential appliances and lighting. Household income, one of the primary drivers of residential customer usage, had modest growth in 2016.
Retail energy sales decreased 1.2 billion KWHs in 2015 as comparedan ongoing migration to the prior year. This decrease was primarily theelectronic commerce business model. Industrial usage decreases are a result of milder weatherchanges in the first and fourth quarters of 2015 as compared to the corresponding periods in 2014 and decreased customer usage, partially offset by customer growth. Weather-adjusted commercial KWH sales increasedproduction levels primarily due to customer growth and increased customer usage. Weather-adjusted residential KWH sales increased primarily due to customer growth, partially offset by decreased customer usage. Household income, one of the primary drivers of residential customer usage, had modest growth in 2015. The decrease in industrial KWH energy sales was primarily due to decreased sales in the primary metals, paper, chemicals, and paper sectors, partially offset by increased sales in the transportation, stone, clay, and glass, pipeline, lumber, and petroleumtextiles sectors. A strong dollar, low oil prices, and weak global economic conditions constrained growth in the industrial sector in 2015.
See "Electric"Electric Operating Revenues"Revenues" above for a discussion of significant changes in wholesale revenues related to changes in price and KWH sales.
Other Revenues
Other revenues increased $83$54 million, or 32.0%, in 20162019 as compared to the prior year. The 2016 increase was primarily due to revenuesincreases at Georgia Power of $20 million from certain non-regulatedunregulated sales associated with new energy conservation projects and $14 million from unregulated power delivery construction and maintenance contracts, as well as an increase at Alabama Power of $11 million in unregulated sales of products and services by the traditional electric operating companies that were reclassified as other revenues for consistency of presentation on a consolidated basis following the PowerSecure acquisition. In prior periods, these revenues were included in other income (expense), net.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


services.
Fuel and Purchased Power Expenses
Fuel costs constitute the single largest expense for the electric utilities. The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the electric utilities purchase a portion of their electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the Southern Company system's generation and purchased power were as follows:
2016 2015 20142019 
2018(a)
Total generation (in billions of KWHs)
188
 187
 191
187
 191
Total purchased power (in billions of KWHs)
16
 13
 12
18
 14
Sources of generation (percent)
     
 
Gas52
 48
Coal33
 34
 42
22
 27
Nuclear16
 16
 16
16
 16
Hydro3
 3
Other7
 6
Cost of fuel, generated (in cents per net KWH)

 
Gas46
 46
 39
2.36
 2.76
Hydro2
 3
 3
Other Renewables3
 1
 
Cost of fuel, generated (in cents per net KWH)
     
Coal3.04
 3.55
 3.81
2.87
 2.93
Nuclear0.81
 0.79
 0.87
0.79
 0.80
Gas2.48
 2.60
 3.63
Average cost of fuel, generated (in cents per net KWH)
2.40
 2.64
 3.25
2.20
 2.46
Average cost of purchased power (in cents per net KWH)(*)
5.43
 6.11
 7.13
Average cost of purchased power (in cents per net KWH)(b)
5.01
 5.94
(*)(a)Excludes Gulf Power, which was sold on January 1, 2019.
(b)Average cost of purchased power includes fuel purchased by the Southern Company system for tolling agreements where power is generated by the provider.
In 2016,2019, total fuel and purchased power expenses were $5.1$4.4 billion, a decrease of $284 million,$1.2 billion, or 5.3%20.9%, as compared to the prior year. TheExcluding approximately $511 million associated with the sale of Gulf Power, the decrease was primarily the result of a $518$575 million decrease in the average cost of fuel and purchased power primarily due to lower coal and natural gas prices, partially offset by a $234 million increase in the volume of KWHs generated and purchased.
In 2015, total fuel and purchased power expenses were $5.4 billion, a decrease of $1.3 billion, or 19.2%, as compared to the prior year. The decrease was primarily the result of a $1.1 billion decrease in the average cost of fuel and purchased power primarily due to lower coal and natural gas prices and a $137an $84 million net decrease in the volume of KWHs generated and purchased due to milder weather in the first and fourth quarters of 2015.purchased.
Fuel and purchased power energy transactions at the traditional electric operating companies are generally offset by fuel revenues and do not have a significant impact on net income. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersFuel Cost Recovery" herein for additional information. Fuel expenses incurred under Southern Power's PPAs are generally the responsibility of the counterparties and do not significantly impact net income.
Fuel
In 2016,2019, fuel expense was $4.4$3.6 billion, a decrease of $389 million,$1.0 billion, or 8.2%21.9%, as compared to the prior year. TheExcluding approximately $309 million related to Gulf Power in 2018, the decrease was primarily due to a 14.4%an 18.1% decrease in the average costvolume of KWHs generated by coal, per KWH generated, a 4.6%14.5% decrease in the average cost of natural gas per KWH generated, and a 2.7% decrease in the volume of KWHs generated by coal, partially offset by a 3.5% increase in the volume of KWHs generated by natural gas.
In 2015, fuel expense was $4.8 billion, a decrease of $1.3 billion, or 20.9%, as compared to the prior year. The decrease was primarily due to a 28.4% decrease in the average cost of natural gas per KWH generated, a 19.2% decrease in the volume of KWHs generated by coal, and a 6.8%2.1% decrease in the average cost of coal per KWH generated, partially offset by a 15.9%5.0% increase in the volume of KWHs generated by natural gas.
Purchased Power
In 2016,2019, purchased power expense was $750$816 million, an increasea decrease of $105$155 million, or 16.3%16.0%, as compared to the prior year. The increaseExcluding approximately $202 million associated with the sale of Gulf Power, the change was primarily due to a 28.8%9.6% increase in the volume of KWHs purchased, partially offset by an 11.1%a 15.7% decrease in the average cost perof KWH purchased primarily as a result of lower natural gas prices.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


In 2015, purchased power expense was $645 million, a decrease of $27 million, or 4.0%, as compared to the prior year. The decrease was primarily due to a 14.3% decrease in the average cost per KWH purchased primarily as a result of lower natural gas prices, partially offset by a 5.3% increase in the volume of KWHs purchased.
Energy purchases will vary depending on demand for energy within the Southern Company system's electric service territory, the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, and the availability of the Southern Company system's generation.
Cost of Other Sales
Cost of other sales were $58 million in 2016. These costs were related to certain non-regulated sales of products and services by the traditional electric operating companies that were reclassified as cost of other sales for consistency of presentation on a consolidated basis following the PowerSecure acquisition. In prior periods, these costs were included in other income (expense), net.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses increased $231decreased $156 million, or 5.4%3.4%, in 20162019 as compared to the prior year. The increase was primarilydecrease reflects approximately $356 million related to a $76Gulf Power in 2018 and $17 million increase inrelated to the dispositions of Southern Power's Florida Plants and Plant Nacogdoches, partially offset by additional accruals of $123 million to the NDR at Alabama Power, $21 million of increased transmission and distribution expenses primarily relateddue to overhead line maintenance a $37and vegetation management at the traditional electric operating companies, $18 million decrease in gains from costs associated with unregulated sales of assets at Georgia Power a $36primarily associated with new energy conservation projects and power delivery construction and maintenance contracts, and $16 million charge in connection with cost containment activitiesrelated to an adjustment for FERC fees at Georgia Power following the conclusion of a multi-year audit of
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and a $35 million increase at Southern PowerSubsidiary Companies 2019 Annual Report

headwater benefits associated with new solarhydro facilities. See Notes 2 and wind facilities placed in service in 201515 to the financial statements under "Alabama Power – Rate NDR" and 2016. Additionally, the increase was due to a $19 million increase in generation expenses primarily related to environmental costs, a $19 million increase in business development"Southern PowerSales of Natural Gas and support expenses at Southern Power,Biomass Plants," respectively, for additional information.
Depreciation and an $11 million increase in scheduled outageAmortization
Depreciation and maintenance costs at generation facilities, partially offset by a $41 million net decrease in employee compensation and benefits, including pension costs.
Other operations and maintenance expenses increased $33amortization decreased $93 million, or 0.8%3.6%, in 20152019 as compared to the prior year. The increasedecrease was primarily due to a decrease of $191 million related to an $84 million increaseGulf Power in employee compensation and benefits including pension costs, a $62 million increase in generation expenses primarily related to environmental costs, and an $11 million increase in customer accounts, service, and sales costs primarily related to customer incentive and demand-side management programs,2018, partially offset by a $99an increase in depreciation of $62 million decrease in transmission and distribution costs primarily related to reduced overhead line maintenance and gainsresulting from sales of transmission assets and a $32 million decrease in scheduled outage and maintenance costs at generation facilities.
Production expenses and transmission and distribution expenses fluctuate from year to year due to variations in outage and maintenance schedules and normal changes in the cost of labor and materials.
Depreciation and Amortization
Depreciation and amortization increased $213 million, or 10.5%, in 2016 as compared to the prior year primarily due to additional plant in service at the traditional electric operating companies and Southern Power.
Depreciation and amortization increased $91 million, or 4.7%,an increase in 2015 as compared to the prior year primarily due to the amortization of $120regulatory assets of $47 million of the regulatory liability for other cost of removal obligations in 2014primarily at AlabamaMississippi Power and increases in additional plant in service at the traditional electric operating companies and Southern Power, partially offset by a decrease as a result of a reduction in depreciation rates at Alabama Power effective January 1, 2015, a decrease due to unit retirements at Georgia Power, and a reduction in depreciation at Gulf Power as authorized in the 2013 rate case settlement agreement approved by the Florida PSC.Power. See Note 32 to the financial statements under "Southern CompanyRegulatory MattersGulf PowerRetail Base Rate CasesAssets and Liabilities" for additional information.
Seeand Note 15 to the financial statements under "Regulatory Assets and Liabilities" and "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
Taxes other than income taxes increased $44decreased $87 million, or 4.4%7.9%, in 2016 as compared to the prior year primarily due to an increase in property taxes due to higher assessed value of property at the traditional electric operating companies, increases in state and municipal utility license tax bases at Alabama Power, an increase in payroll taxes at Georgia Power, and an increase in franchise taxes at Mississippi Power.
Taxes other than income taxes increased $16 million, or 1.6%, in 2015 as compared to the prior year primarily due to an increase in property taxes due to higher assessed value of property at the traditional electric operating companies.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


Estimated Loss on Kemper IGCC
In 2016, 2015, and 2014, estimated probable losses on the Kemper IGCC of $428 million, $365 million, and $868 million, respectively, were recorded at Southern Company. These losses reflect revisions of estimated costs expected to be incurred on Mississippi Power's construction of the Kemper IGCC in excess of the $2.88 billion cost cap established by the Mississippi PSC, net of $245 million of grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2 (Initial DOE Grants) and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, AFUDC, and certain general exceptions, including change of law, force majeure, and beneficial capital (which exists when Mississippi Power demonstrates that the purpose and effect of the construction cost increase is to produce efficiencies that will result in a neutral or favorable effect on customers relative to the original proposal for the CPCN) (Cost Cap Exceptions). The 2016 loss also reflects $80 million associated with the estimated minimum probable amount of costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information.
Allowance for Equity Funds Used During Construction
AFUDC equity decreased $26 million, or 11.5%, in 2016 as compared to the prior year primarily due to environmental and generation projects being placed in service at Alabama Power and Gulf Power, partially offset by a higher AFUDC rate and an increase in Kemper IGCC CWIP subject to AFUDC at Mississippi Power.
AFUDC equity decreased $19 million, or 7.8%, in 20152019 as compared to the prior year primarily due to a reductiondecrease of $118 million related to the sale of Gulf Power, partially offset by higher property taxes of $30 million primarily at Georgia Power.
Estimated Loss on Plants Under Construction
The $1.1 billion charge in 2018 reflects Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. The 2019 charges of $24 million were associated with abandonment and closure activities for the AFUDC rate at Mississippi Power, as well as placing the combined cyclemine and the associated common facilities portiongasifier-related assets of the Kemper IGCC in service in August 2014, partially offset by an increase in construction projects related to environmental and steam generation at Alabama Power.
Mississippi Power, net of sales proceeds. See Note 32 to the financial statements under "Integrated Coal Gasification Combined CycleGeorgia PowerNuclear Construction" and "Mississippi PowerKemper County Energy Facility" for additional information regardinginformation.
Impairment Charges
In the Kemper IGCC.second quarter 2018, Southern Power recorded a $119 million asset impairment charge related to the sale of the Florida Plants and in the third quarter 2018 recorded a $36 million asset impairment charge on wind turbine equipment held for development projects. Asset impairment charges recorded in 2019 were immaterial. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information.
(Gain) Loss on Dispositions, Net
Gain on dispositions, net increased $21 million in 2019 as compared to the prior year primarily due to Southern Power's sale of Plant Nacogdoches in the second quarter 2019. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increased $157decreased $48 million, or 20.3%4.6%, in 20162019 as compared to the prior year primarily due to an increase in interest expense at Southern Power related to additional debt issued primarily to fund its growth strategy and continuous construction program, increases in both the average outstanding long-term debt balance and the average interest rate at the traditional electric operating companies, and the May 2015 terminationsale of an asset purchase agreement between Mississippi Power and SMEPA and the resulting reversal of accrued interest on related deposits.Gulf Power.
Interest expense,Other Income (Expense), Net
Other income (expense), net of amounts capitalized decreased $20increased $90 million, or 2.5%62.5%, in 20152019 as compared to the prior year primarily due to a decrease of $58$36 million at Mississippi Power related togain arising from the termination of an agreement for SMEPA to purchase a portion of the Kemper IGCC which required the return of SMEPA's deposits at a lower rate of interest than accrued and a $14 million decrease primarily due to an increase in capitalized interest associated with the construction ofRoserock solar facilitiesfacility litigation settlement at Southern Power partially offset by a $46in 2019, $37 million increase due to higher average outstanding long-term debt balancesfrom decreased charitable donations in 2019 at the traditional electric operating companies.
companies, $23 million of increased non-service cost-related retirement benefits income, and $16 million of increased interest income primarily associated with a new tolling arrangement accounted for as a sales-type lease at Mississippi Power as well as temporary cash investments, primarily at Alabama Power. These increases were partially offset by $24 million related to the settlement of Mississippi Power's Deepwater Horizon claim in 2018 and a $14 million gain from a joint-development wind project at Southern Power in 2018 attributable to its partner in the project. See Note 63 to the financial statements under "General Litigation MattersSouthern Power" and "Other Matters– Mississippi Power" and Note 11 to the financial statements under "Pension Plans" for additional information.
Income Taxes
Income taxes increased $501 million, or 242.0%, in 2019 as compared to the prior year. Excluding an income tax benefit of approximately $20 million related to Gulf Power in 2018, income taxes increased $481 million. The increase was primarily due to increases in pre-tax earnings, including the $1.1 billion charge in 2018 associated with Plant Vogtle Units 3 and 4 construction at Georgia Power. See Notes 10 and 15 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net decreased $43 million, or 134.4%, in 2016 as compared to the prior year primarily due to the reclassification of revenues and costs associated with certain non-regulated sales of products and services by the traditional electric operating companies to other revenues and cost of other sales for consistency of presentation on a consolidated basis following the PowerSecure acquisition. The net amounts reclassified were $25 million. Also contributing to the decrease was an $8 million decrease in customer contributions in aid of construction (CIAC) and a $6 million decrease in wholesale operating fee revenue at Georgia Power.
Other income (expense), net increased $23 million, or 41.8%, in 2015 as compared to the prior year primarily due to an increase of $9 million in wholesale operating fee revenues, an increase of $9 million in customer CIAC at Georgia Power, and an increase due to Mississippi Power's $7 million settlement with the Sierra Club in 2014, partially offset by a decrease in sales of non-utility property at Alabama Power.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report



Net Income TaxesAttributable to Noncontrolling Interests
Income taxesSubstantially all noncontrolling interests relate to renewable projects at Southern Power. Net income attributable to noncontrolling interests decreased $235$69 million, or 17.7%116.9%, in 20162019, as compared to the prior yearyear. The decrease was primarily due to increased federal income tax benefits related$92 million of losses attributable to ITCs for solar plants placed in service and PTCs from wind generation at Southern Power in 2016.
Income taxes increased $273 million, or 25.9%, in 2015 as compared to the prior year primarily due to a reduction in tax benefitsnoncontrolling interests related to the estimated probable losses on Mississippi Power's construction of the Kemper IGCC recordedtax equity partnerships entered into in 20142018 and higher pre-tax earnings,$14 million attributable to a joint-development wind project in 2018, partially offset by increased federalan allocation of approximately $29 million of income tax benefitsto the noncontrolling interest partner related to ITCs at Southern Power in 2015.
the Roserock solar facility litigation settlement. See Note 53 to the financial statements under "Effective Tax Rate""General Litigation MattersSouthern Power" and Note 7 to the financial statements under "Southern Power" for additional information.information regarding the litigation settlement and tax equity partnerships, respectively.
Gas Business
Southern Company Gas distributes natural gas through utilities in sevenfour states and is involved in several other complementary businesses including gas marketing services,pipeline investments, wholesale gas services, and gas midstream operations.
On July 1, 2016, Southern Company Gas became a wholly-owned, direct subsidiary of Southern Company. Prior to the completion of the Merger, Southern Company and Southern Company Gas operated as separate companies. The condensed statement of income herein includes Southern Company Gas' results of operations since July 1, 2016. See Note 12 to the financial statements under "Southern CompanyMerger with Southern Company Gas" for additional information regarding the Merger, including certain pro forma results of operations.marketing services.
A condensed statement of income for the gas business follows:
Amount
20162019 
Increase
(Decrease)
from 2018
(in millions)(in millions)
Operating revenues$1,652
$3,792
 $(117)
Cost of natural gas613
1,319
 (220)
Cost of other sales10

 (12)
Other operations and maintenance523
888
 (93)
Depreciation and amortization238
487
 (13)
Taxes other than income taxes71
213
 2
Impairment charges115
 73
(Gain) loss on dispositions, net
 291
Total operating expenses1,455
3,022
 28
Operating income197
770
 (145)
Earnings from equity method investments60
157
 9
Interest expense, net of amounts capitalized81
232
 4
Other income (expense), net14
20
 19
Income taxes76
130
 (334)
Net income114
$585
 $213
Less: Net income attributable to noncontrolling interests
Net Income Attributable to Southern Company Gas$114
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
The Southern Company Gas Dispositions were completed by July 29, 2018 and Subsidiary Companies 2016 Annual Report


represent the primary variance driver for 2019 compared to 2018. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Southern Company Gas Dispositions.
Seasonality of Results
During the period from November through March when natural gas usage and operating revenues are generally higher (Heating Season), more customers are connected to Southern Company Gas' distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively equally over any given year. Thus, operating results can vary significantly from quarter to quarter as a result of seasonality. For July 1, 2016 through December 31, 2016,2019, the percentage of operating revenues and net income generated during the Heating Season (November(January through March and November through December) were 67.1%68.7% and 96.5%86.8%, respectively. For 2018, the percentage of operating revenues and net income generated during the Heating Season were 68.7% and 96.0%, respectively.
Other Business Activities
Table of ContentsIndex to Financial Statements
Southern Company's other business activities include the parent company (which does not allocate operating expenses to business units), products and services in the areas of distributed generation, energy efficiency, and utility infrastructure, and investments in leveraged lease projects and telecommunications. These businesses are classified in general categories and may comprise the following subsidiaries: PowerSecure is a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure; Southern Company Holdings, Inc. (Southern Holdings) invests in various projects, including leveraged lease projects; and Southern LINC provides digital wireless communications for use by
COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and its subsidiary companiesSubsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues in 2019 were $3.8 billion, a $117 million decrease compared to 2018. Details of operating revenues were as follows:
 2019
 (in millions)
Operating revenues – prior year$3,909
Estimated change resulting from –
Infrastructure replacement programs and base rate changes96
Gas costs and other cost recovery(89)
Wholesale gas services150
Southern Company Gas Dispositions(*)
(300)
Other26
Operating revenues – current year$3,792
Percent change(3.0)%
(*)
Includes a $245 million decrease related to natural gas revenues, including alternative revenue programs, and a $55 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and also markets these servicesbase rate changes increased in 2019 compared to the publicprior year primarily due to increases of $74 million at Nicor Gas and provides fiber cable services within$16 million at Atlanta Gas Light. These amounts include the Southeast.
On May 9, 2016, Southern Company acquired allnatural gas distribution utilities' continued investments recovered through infrastructure replacement programs and base rate increases as well as customer refunds in 2018 as a result of the outstanding stock of PowerSecure for $18.75 per common share in cash, resulting in an aggregate purchase price of $429 million. As a result, PowerSecure became a wholly-owned subsidiary of Southern Company.Tax Reform Legislation. See Note 122 to the financial statements under "Southern CompanyAcquisition of PowerSecure Gas" for additional information.
A condensed statementRevenues attributable to gas costs and other cost recovery decreased in 2019 compared to the prior year primarily due to lower natural gas prices and decreased volumes of natural gas sold. Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities.
Revenues from wholesale gas services increased in 2019 primarily due to derivative gains, partially offset by decreased commercial activity.
Other natural gas revenues increased in 2019 primarily due to increases in customers at the natural gas distribution utilities and recovery of prior period hedge losses at gas marketing services.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, the natural gas distribution utilities charge their utility customers for Southern Company's other business activities follows:natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. The natural gas distribution utilities defer or accrue the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities. Cost of natural gas at the natural gas distribution utilities represented 84.5% of the total cost of natural gas for 2019.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
 Amount 
Increase (Decrease)
from Prior Year
 2016 2016 2015
 (in millions)
Operating revenues$303
 $256
 $(14)
Cost of other sales192
 192
 
Other operations and maintenance194
 70
 29
Depreciation and amortization31
 17
 (2)
Taxes other than income taxes3
 1
 
Total operating expenses420
 280
 27
Operating income (loss)(117) (24) (41)
Interest expense305
 239
 25
Other income (expense), net(31) (24) (18)
Income taxes(216) (84) (56)
Net income (loss)$(237) $(203) $(28)
Operating Revenues
Southern Company's non-electric operating revenues for these other business activities increased $256In 2019, cost of natural gas was $1.3 billion, a decrease of $220 million, or 544.7%14.3%, in 2016 as compared to the prior year. The increase was primarilyExcluding a $106 million decrease related to revenues from products and services at PowerSecure,the Southern Company Gas Dispositions, cost of natural gas decreased by $114 million, which was acquired on May 9, 2016. Non-electric operating revenues for these other business activities decreased $14 million, or 23.0%,reflects a 14.8% decrease in 2015 asnatural gas prices compared to the prior year. The decrease was primarily related2018.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Holdings due to higher billings in 2014 related to work performed on a generating plant outageCompany and decreases in revenues at Southern LINC related to lower average per subscriber revenue and fewer subscribers due to continued competition in the industry.Subsidiary Companies 2019 Annual Report

Cost of Other Sales
Cost of other sales were $192related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $93 million, or 9.5%, in 2019 compared to the prior year. Excluding a $65 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses decreased $28 million. This decrease was primarily due to $28 million of disposition-related costs incurred during 2018, a $12 million adjustment in 2018 for the adoption of a new paid time off policy, an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions in 2018, and a $7 million decrease in compensation and benefits costs, partially offset by a $22 million increase in rider expenses, primarily at Nicor Gas, passed through directly to customers. See FUTURE EARNINGS POTENTIAL – "Southern Company GasUtility Regulation and Rate Design" herein for additional information.
Depreciation and Amortization
Depreciation and amortization decreased $13 million, or 2.6%, in 2019 compared to the prior year. Excluding a $27 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $14 million. This increase was primarily due to continued infrastructure investments at the natural gas distribution utilities, partially offset by accelerated depreciation related to assets retired in 2018. See Note 2 to the financial statements under "Southern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information.
Impairment Charges
In 2019, Southern Company Gas recorded impairment charges of $91 million related to a natural gas storage facility in Louisiana and $24 million in 2016. These costs werecontemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. In 2018, a goodwill impairment charge of $42 million was recorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1, 3, and 15 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities," "Other MattersSouthern Company Gas," and "Southern Company Gas," respectively, for additional information.
(Gain) Loss on Dispositions, Net
Gain on dispositions, net was $291 million in 2018 and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
Earnings from equity method investments increased $9 million, or 6.1%, in 2019 compared to the prior year and reflect higher earnings from SNG as a result of rate increases that became effective September 2018, partially offset by a $6 million pre-tax loss on the sale of Triton in May 2019. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $19 million in 2019 compared to the prior year. This increase primarily resulted from a $23 million decrease in charitable donations in 2019.
Income Taxes
Income taxes decreased $334 million, or 72.0%, in 2019 compared to the prior year. This decrease primarily reflects a reduction of $348 million related to salesthe Southern Company Gas Dispositions, as well as $29 million in benefits associated with impairment charges in 2019 and additional benefits from the flowback of productsexcess deferred income taxes in 2019 primarily at Atlanta Gas Light as previously authorized by the Georgia PSC, partially offset by $48 million of additional taxes associated with increased pre-tax earnings at wholesale gas services.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and services by PowerSecure, which was acquiredNote 10 to the financial statements for additional information. Also see Notes 2, 3, and 15 to the financial statements under "Southern Company Gas," "Other MattersSouthern Company Gas," and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on May 9, 2016.Atlanta Gas Light's regulatory treatment of the impacts of the Tax Reform Legislation and the impairment charges.
Table of Contents    ��                       Index to Financial Statements


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report


Other Business Activities
Southern Company's other business activities primarily include the parent company (which does not allocate operating expenses to business units); PowerSecure, a provider of energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency; Southern Holdings, which invests in various projects, including leveraged lease projects; and Southern Linc, which provides digital wireless communications for use by the Southern Company system and also markets these services to the public and provides fiber optics services within the Southeast.
A condensed statement of income for Southern Company's other business activities follows:

 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$532
 $(483)
Cost of other sales359
 (369)
Other operations and maintenance233
 (40)
Depreciation and amortization79
 13
Taxes other than income taxes6
 
Impairment charges50
 38
(Gain) loss on dispositions, net(2,548) (2,548)
Total operating expenses(1,821) (2,906)
Operating income (loss)2,353
 2,423
Interest expense517
 (62)
Other income (expense), net10
 33
Income taxes (benefit)960
 1,182
Net income (loss)$886
 $1,336
Operating Revenues
Southern Company's operating revenues for these other business activities decreased $483 million, or 47.6%, in 2019 as compared to the prior year primarily related to PowerSecure's 2018 storm restoration services in Puerto Rico and the sale of PowerSecure's utility infrastructure services business in June 2019.
Cost of Other Sales
Cost of other sales for these other business activities decreased $369 million, or 50.7%, in 2019 as compared to the prior year primarily related to PowerSecure's 2018 storm restoration services in Puerto Rico and the sale of PowerSecure's utility infrastructure services business in June 2019.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses for these other business activities increased $70decreased $40 million, or 56.5%14.7%, in 2016 as compared to the prior year. The increase was primarily due to $47 million in operations and maintenance expenses at PowerSecure since the acquisition closed on May 9, 2016 and an increase in parent company expenses of $16 million related to the Merger and the acquisition of PowerSecure. Other operations and maintenance expenses for these other business activities increased $29 million, or 30.5%, in 2015 as compared to the prior year. The increase was primarily due to parent company expenses of $27 million related to the Merger, partially offset by lower operating expenses at Southern Holdings due to work performed on a generating plant outage in 2014.
Other Income (Expense), Net
Other income (expense), net for these other business activities decreased $24 million in 20162019 as compared to the prior year. The decrease was primarily due to an increase of $16PowerSecure's lower employee compensation and benefits in 2019 and 2018 storm restoration services in Puerto Rico.
Impairment Charges
In 2019, goodwill and asset impairment charges totaling $50 million in parent company expenseswere recorded related to feesthe sale of PowerSecure's utility infrastructure services and lighting businesses. In 2018, asset impairment charges of $12 million associated with Southern Linc's tower leases were recorded in contemplation of the bridge financingsale of Gulf Power.
(Gain) Loss on Dispositions, Net
The 2019 gain on dispositions, net primarily relates to the gain of $2.6 billion ($1.4 billion after tax) on the sale of Gulf Power. See Note 15 to the financial statements under "Southern Company" for additional information.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Interest Expense
Interest expense for these other business activities decreased $62 million, or 10.7%, in 2019 as compared to the Merger. prior year primarily due to a decrease in average outstanding long-term debt at the parent company. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net for these other business activities increased $33 million in 2019 as compared to the prior year primarily due to a $43 million decrease in charitable donations at the parent company, partially offset by a $17 million impairment charge associated with a leveraged lease at Southern Holdings in 2019. See Notes 1 and 3 to the financial statements under "Leveraged Leases" and "Other MattersSouthern Company," respectively, for additional information.
Income Taxes (Benefit)
The income tax for these other business activities increased $1.2 billion in 2019 as compared to the prior year primarily due to the tax impacts related to the sale of Gulf Power. See Note 10 to the financial statements and Note 15 to the financial statements under "Southern Company" for additional information.
Alabama Power
Alabama Power's 2019 net income after dividends on preferred and preference stock was $1.07 billion, representing a $140 million, or 15.1%, increase over the previous year. The increase was primarily due to an increase in retail revenues associated with the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and a lower Rate RSE customer refund in 2019 as compared to the prior year, as well as additional capital investments recovered through Rate CNP Compliance. The increase in revenue is partially offset by increases in operations and maintenance and depreciation expenses and lower customer usage. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate RSE" and " – Rate CNP Compliance" herein for additional information.
A condensed income statement for Alabama Power follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$6,125
 $93
Fuel1,112
 (189)
Purchased power403
 (29)
Other operations and maintenance1,821
 152
Depreciation and amortization793
 29
Taxes other than income taxes403
 14
Total operating expenses4,532
 (23)
Operating income1,593
 116
Allowance for equity funds used during construction52
 (10)
Interest expense, net of amounts capitalized336
 13
Other income (expense), net46
 26
Income taxes270
 (21)
Net income1,085
 140
Dividends on preferred and preference stock15
 
Net income after dividends on preferred and preference stock$1,070
 $140
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were $6.1 billion, reflecting a $0.1 billion increase from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$5,367
  
Estimated change resulting from —   
Rates and pricing347
  
Sales decline(79)  
Weather(3)  
Fuel and other cost recovery(131)  
Retail — current year5,501
 $5,367
Wholesale revenues —   
Non-affiliates258
 279
Affiliates81
 119
Total wholesale revenues339
 398
Other operating revenues285
 267
Total operating revenues$6,125
 $6,032
Percent change1.5% (0.1)%
Retail revenues in 2019 were $5.5 billion. These revenues increased $134 million, or 2.5%, in 2019 as compared to the prior year. The increase in 2019 was primarily due to increases in rates and pricing associated with the impact of customer bill credits issued in 2018 related to the Tax Reform Legislation and additional capital investments recovered through Rate CNP Compliance, as well as a lower Rate RSE customer refund in 2019 as compared to the prior year, partially offset by decreases in fuel revenues and customer usage, as well as milder weather in 2019 as compared to 2018.
See Note 2 to the financial statements under "Alabama PowerRate RSE" and " – Rate CNP Compliance" for additional information. See "Energy Sales" herein for a discussion of changes in the volume of energy sold, including changes related to sales decline and weather.
Electric rates include provisions to recognize the recovery of fuel costs, purchased power costs, PPAs certificated by the Alabama PSC, and costs associated with the natural disaster reserve. Under these provisions, fuel and other cost recovery revenues generally equal fuel and other cost recovery expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate ECR" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2019 2018
 (in millions)
Capacity and other$102
 $101
Energy156
 178
Total non-affiliated$258
 $279
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Alabama Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not affect net income. Short-term opportunity energy sales are also included in wholesale energy sales to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Alabama Power's variable cost to produce the energy.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In 2019, wholesale revenues from sales to non-affiliates decreased $21 million, or 7.5%, as compared to the prior year primarily as a result of an 8.2% decrease in energy prices due to lower natural gas prices, partially offset by a 1% increase in the amount of KWHs sold.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales and purchases are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost and energy purchases are generally offset by energy revenues through Alabama Power's energy cost recovery clause.
In 2019, wholesale revenues from sales to affiliates decreased $38 million, or 31.9%, as compared to the prior year. In 2019, KWH sales decreased 22.7% due to the decreased availability of coal generation associated with the retirement of Plant Gorgas Units 8, 9, and 10, and the price of energy decreased 11.8% as a result of lower natural gas prices.
In 2019, other operating revenues increased $18 million, or 6.7%, as compared to the prior year primarily due to an increase in 2015unregulated sales of products and services and pole attachment agreements.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 (in billions)    
Residential18.3
 (1.9)% (1.5)%
Commercial13.6
 (2.2) (2.2)
Industrial22.1
 (3.7) (3.7)
Other0.2
 (7.3) (7.3)
Total retail54.2
 (2.8) (2.6)%
Wholesale     
Non-affiliates5.1
 1.2
  
Affiliates3.5
 (22.7)  
Total wholesale8.6
 (10.1)  
Total energy sales62.8
 (3.8)%  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales in 2019 decreased 2.8% primarily due to lower customer usage and milder weather in 2019 compared to 2018. Weather-adjusted residential sales were 1.5% lower in 2019 primarily due to lower customer usage resulting from an increase in penetration of energy-efficient residential appliances, partially offset by customer growth. Weather-adjusted commercial sales were 2.2% lower in 2019 primarily due to lower customer usage resulting from customer initiatives in energy savings and an ongoing migration to the electronic commerce business model, partially offset by customer growth. Industrial sales decreased 3.7% in 2019 as compared to 2018 primarily as a result of changes in production levels in the primary metals and chemicals sectors.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues from sales to non-affiliates and wholesale revenues from sales to affiliated companies related to changes in price and KWH sales.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by the unit cost of fuel consumed, demand, and the availability of generating units. Additionally, Alabama Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Alabama Power's generation and purchased power were as follows:
 2019 2018
Total generation (in billions of KWHs)
56.9
 60.5
Total purchased power (in billions of KWHs)
9.4
 8.1
Sources of generation (percent) —
   
Coal45
 50
Nuclear25
 23
Gas21
 19
Hydro9
 8
Cost of fuel, generated (in cents per net KWH) —
   
Coal2.69
 2.73
Nuclear0.77
 0.77
Gas2.47
 2.84
Average cost of fuel, generated (in cents per net KWH)(a)(b)
2.11
 2.26
Average cost of purchased power (in cents per net KWH)(c)
4.39
 5.47
(a)
For 2018, cost of fuel, generated and average cost of fuel, generated excludes a $30 million adjustment associated with a May 2018 Alabama PSC accounting order related to excess deferred income taxes. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerTax Reform Accounting Order" herein for additional information.
(b)KWHs generated by hydro are excluded from the average cost of fuel, generated.
(c)Average cost of purchased power includes fuel, energy, and transmission purchased by Alabama Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $1.5 billion in 2019, a decrease of $218 million, or 12.6%, compared to 2018. The decrease was primarily due to a $102 million decrease in the average cost of purchased power, a $56 million decrease in the average cost of fuel, a $30 million net decrease related to the volume of KWHs purchased and generated, and a $30 million decrease in fuel expense associated with the May 2018 Alabama PSC accounting order.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through Alabama Power's energy cost recovery clause. Alabama Power, along with the Alabama PSC, continuously monitors the under/over recovered balance to determine whether adjustments to billing rates are required. See Note 2 to the financial statements under "Alabama PowerRate ECR" for additional information.
Fuel
Fuel expenses were $1.1 billion in 2019, a decrease of $189 million, or 14.5%, compared to 2018. The decrease was primarily due to a 13% decrease in the average cost of KWHs generated by natural gas, which excludes tolling agreements, a 14.4% decrease in the volume of KWHs generated by coal, and a 5.2% increase in the volume of KWHs generated by hydro, as well as a $30 million decrease in fuel expense associated with the May 2018 Alabama PSC accounting order.
Purchased Power Non-Affiliates
Purchased power expense from non-affiliates was $203 million in 2019, a decrease of $13 million, or 6.0%, compared to 2018. This decrease was primarily due to a 12.6% decrease in the average cost per KWH purchased due to lower natural gas prices. The decrease was partially offset by a 9.1% increase in the amount of energy purchased as a result of decreased coal generation due to the retirement of Plant Gorgas Units 8, 9, and 10.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation.
Purchased Power Affiliates
Purchased power expense from affiliates was $200 million in 2019, a decrease of $16 million, or 7.4%, compared to 2018. This decrease was primarily due to a 25.2% decrease in the average cost per KWH purchased due to lower natural gas prices. The decrease was partially offset by a 24.1% increase in the amount of energy purchased primarily due to the availability of lower-cost
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

generation compared to Alabama Power's owned generation and a decrease in coal generation due to the retirement of Plant Gorgas Units 8, 9, and 10.
Energy purchases from affiliates will vary depending on demand for energy and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses increased $152 million, or 9.1%, as compared to the prior year primarily due to additional accruals of $123 million to the NDR as well as $11 million in Rate CNP Compliance-related expenses. See Note 2 to the financial statements under "Alabama Power – Rate NDR" and " – Rate CNP Compliance" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $29 million, or 3.8%, in 2019 as compared to the prior year primarily due to additional plant in service. See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $26 million, or 130.0%, in 2019 as compared to the prior year primarily due to a decrease of $17 million in charitable donations and an increase of $9 million in interest income from temporary cash investments.
Income Taxes
Income taxes decreased $21 million, or 7.2%, in 2019 as compared to the prior year primarily due to additional benefits from the flowback of excess deferred income taxes in accordance with an Alabama PSC accounting order, partially offset by an increase in pre-tax net income. See Note 2 to the financial statements under "Alabama Power – Tax Reform Accounting Order" for additional information.
Georgia Power
Georgia Power's 2019 net income was $1.7 billion, representing a $927 million, or 116.9%, increase from the previous year. The increase was primarily due to a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4, an increase in retail base revenues associated with higher contributions from commercial and industrial customers with variable demand-driven pricing, and an increase in other revenues primarily related to unregulated sales. Partially offsetting the increase were higher non-fuel operations and maintenance expenses and depreciation and amortization.
A condensed income statement for Georgia Power follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$8,408
 $(12)
Fuel1,444
 (254)
Purchased power1,096
 (57)
Other operations and maintenance1,972
 112
Depreciation and amortization981
 58
Taxes other than income taxes454
 17
Estimated loss on Plant Vogtle Units 3 and 4
 (1,060)
Total operating expenses5,947
 (1,184)
Operating income2,461
 1,172
Interest expense, net of amounts capitalized409
 12
Other income (expense), net140
 25
Income taxes472
 258
Net income$1,720
 $927
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were $8.4 billion, a $12 million decrease from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$7,752
  
Estimated change resulting from —   
Rates and pricing202
  
Sales decline(66)  
Weather39
  
Fuel cost recovery(220)  
Retail — current year7,707
 $7,752
Wholesale revenues —   
Non-affiliates129
 163
Affiliates11
 24
Total wholesale revenues140
 187
Other operating revenues561
 481
Total operating revenues$8,408
 $8,420
Percent change(0.1)% 1.3%
Retail revenues of $7.7 billion in 2019 decreased $45 million, or 0.6%, compared to 2018. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing was primarily due to higher contributions from commercial and industrial customers with variable demand-driven pricing, an increase in the NCCR tariff effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information related to the NCCR tariff.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to the sales decline in 2019.
Electric rates include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these fuel cost recovery provisions, fuel revenues generally equal fuel expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerFuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2019 2018
 (in millions)
Capacity and other$55
 $54
Energy74
 109
Total non-affiliated$129
 $163
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amounts billable under the contract terms and provide for recovery of fixed costs and a return on investment. Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Georgia Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Short-term opportunity sales are made at market-based rates that generally provide a margin above Georgia Power's variable cost of energy.
Wholesale revenues from non-affiliated sales decreased $34 million, or 20.9%, in 2019 as compared to 2018 primarily due to lower energy prices and lower demand.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost. In 2019, wholesale revenues from sales to affiliates decreased $13 million, or 54.2%, as compared to 2018 primarily due to a 36.3% decrease in KWH sales as a result of the lower market cost of available energy compared to the cost of Georgia Power-owned generation.
Other operating revenues increased $80 million, or 16.6%, in 2019 from the prior year primarily due to revenue increases of $27 million from power delivery construction and maintenance contracts, $20 million from unregulated sales associated with new energy conservation projects, $11 million from outdoor lighting LED conversions and sales, $7 million from OATT sales, and $6 million in wholesale operating fees associated with contractual targets.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 (in billions)    
Residential28.2
 (0.5)% (0.4)%
Commercial32.8
 (0.4) (1.3)
Industrial23.2
 (2.1) (2.2)
Other0.5
 (5.6) (5.5)
Total retail84.7
 (0.9) (1.2)%
Wholesale     
Non-affiliates2.7
 (15.8)  
Affiliates0.3
 (36.3)  
Total wholesale3.0
 (18.7)  
Total energy sales87.7
 (1.7)%  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers.
In 2019, weather-adjusted residential and commercial KWH sales decreased 0.4% and 1.3%, respectively, compared to 2018 primarily due to a decline in average customer usage resulting from an increase in energy saving initiatives. The decreases in weather-adjusted residential and commercial KWH sales were largely and partially, respectively, offset by customer growth. Weather-adjusted industrial KWH sales decreased 2.2% primarily due to decreases in the paper, textile, stone, clay, and glass, and lumber sectors, partially offset by an increase in the pipeline sector.
See "Operating Revenues" above for a discussion of significant changes in wholesale sales to non-affiliates and affiliated companies.
Fuel and Purchased Power Expenses
Fuel costs constitute one of the largest expenses for Georgia Power. The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Georgia Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Georgia Power's generation and purchased power were as follows:
 2019 2018
Total generation (in billions of KWHs)
62.6
 65.2
Total purchased power (in billions of KWHs)
29.1
 27.9
Sources of generation (percent) —
   
Gas47
 42
Nuclear26
 25
Coal24
 30
Hydro3
 3
Cost of fuel, generated (in cents per net KWH) 
   
Gas2.42
 2.75
Nuclear0.81
 0.82
Coal3.09
 3.21
Average cost of fuel, generated (in cents per net KWH)
2.16
 2.40
Average cost of purchased power (in cents per net KWH)(*)
4.21
 4.79
(*) Average cost of purchased power includes fuel purchased by Georgia Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $2.5 billion in 2019, a decrease of $311 million, or 10.9%, compared to 2018. The decrease was primarily due to a $289 million decrease related to the average cost of fuel and purchased power.
Fuel and purchased power energy transactions do not have a significant impact on earnings since these fuel expenses are generally offset by fuel revenues through Georgia Power's fuel cost recovery mechanism. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerFuel Cost Recovery" herein for additional information.
Fuel
Fuel expense was $1.4 billion in 2019, a decrease of $254 million, or 15.0%, compared to 2018. The decrease was primarily due to a 10% decrease in the average cost of fuel, primarily related to lower natural gas prices, and a 3.9% decrease in the volume of KWHs generated, primarily due to the lower market cost of energy compared to available Georgia Power resources.
Purchased Power - Non-Affiliates
Purchased power expense from non-affiliates was $521 million in 2019, an increase of $91 million, or 21.2%, compared to 2018. The increase was primarily due to a 53.1% increase in the volume of KWHs purchased primarily due to the lower market cost of energy compared to available Southern Company system resources and warmer weather in the third quarter 2019 resulting in higher customer demand, partially offset by a 22.1% decrease in the average cost per KWH purchased primarily due to lower energy prices.
The volume increase also reflects purchases from Gulf Power which were classified as affiliate prior to January 1, 2019. See Note 15 to the financial statements for information regarding the sale of Gulf Power.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Purchased Power - Affiliates
Purchased power expense from affiliates was $575 million in 2019, a decrease of $148 million, or 20.5%, compared to 2018. The decrease was primarily due to an 11.1% decrease in the volume of KWHs purchased as Georgia Power units generally dispatched at a lower cost than other Southern Company system resources and a 13.0% decrease in the average cost per KWH purchased resulting from lower energy prices.
The decrease in purchased power expense from affiliates also reflects a change in the classification of capacity expenses of $24 million related to PPAs with Southern Power accounted for as finance leases following the adoption of FASB ASC Topic 842, Leases (ASC 842). In 2019, these expenses are included in depreciation and amortization and interest expense, net of amounts capitalized. The decrease in the volume of KWHs purchased also includes the effect of classifying purchases from Gulf Power as
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

non-affiliate beginning January 1, 2019. See Notes 9 and 15 to the financial statements for additional information regarding ASC 842 and the sale of Gulf Power, respectively.
Energy purchases from affiliates will vary depending on the demand and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, all as approved by the FERC.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses increased $112 million, or 6.0%, compared to 2018. The increase reflects increases in expenses of $30 million from unregulated sales primarily associated with new energy conservation projects and power delivery construction and maintenance contracts, $26 million related to scheduled generation outages, $16 million related to an adjustment for FERC fees following the conclusion of a multi-year audit of headwater benefits associated with hydro facilities, $12 million primarily due to the timing of vegetation management and other transmission-related expenses, and $10 million associated with generation maintenance.
Depreciation and Amortization
Depreciation and amortization increased $58 million, or 6.3%, in 2019 compared to 2018. The increase was primarily due to a $31 million increase in depreciation associated with additional plant in service and a $19 million increase in the amortization of regulatory assets related to the retirement of certain generating units. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerIntegrated Resource Plan" herein for additional information on unit retirements.
The increase also reflects the classification of approximately $9 million related to PPAs with Southern Power accounted for as finance leases following the adoption of ASC 842. In prior periods, the expenses related to these PPAs were included in purchased power, affiliates. See Note 9 to the financial statements for additional information regarding ASC 842.
See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
In 2019, taxes other than income taxes increased $17 million, or 3.9%, compared to 2018 primarily due to higher property taxes of $25 million as a result of increases in the assessed value of property, partially offset by a decrease of $11 million in municipal franchise fees, largely due to adjustments associated with the Georgia Power Tax Reform Settlement Agreement. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans – Tax Reform Settlement Agreement" herein for additional information.
Estimated Loss on Plant Vogtle Units 3 and 4
In the second quarter 2018, an estimated probable loss of $1.1 billion was recorded to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See ACCOUNTING POLICIES – "Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4" herein and Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2019, interest expense, net of amounts capitalized increased $12 million, or 3.0%, compared to 2018. The increase was primarily due to the reclassification of $15 million related to PPAs with Southern Power accounted for as finance leases following the adoption of ASC 842 and a $6 million increase in interest expense associated with an increase in outstanding short-term borrowings, partially offset by a $9 million increase in amounts capitalized largely associated with Plant Vogtle Units 3 and 4.
In prior periods, the expenses related to the PPAs with Southern Power were included in purchased power, affiliates. See FINANCIAL CONDITION AND LIQUIDITY – "Sources of Capital" and "Financing Activities" herein for additional information on borrowings, Note 9 to the financial statements for additional information regarding ASC 842, and Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
Other Income (Expense), Net
In 2019, other income (expense), net increased $25 million compared to the prior year primarily due to a $16 million increase in non-service cost-related retirement benefits income and a $13 million decrease in charitable donations, partially offset by a $4 million decrease in interest income from temporary cash investments. See Note 11 to the financial statements for additional information on Georgia Power's net periodic pension and other postretirement benefit costs.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Income Taxes
Income taxes increased $258 million, or 120.6%, in 2019 compared to the prior year primarily as a result of higher pre-tax earnings largely due to the 2018 charge associated with Plant Vogtle Units 3 and 4 construction. This increase was partially offset by additional state ITCs recognized in 2019 and the recognition of a valuation allowance in 2018. See Note 10 to the financial statements for additional information.
Mississippi Power
Mississippi Power's net income after dividends on preferred stock was $139 million in 2019 compared to $235 million in 2018. The change was primarily the result of higher income tax expense following the 2018 partial reversal of a valuation allowance.
A condensed statement of operations follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$1,264
 $(1)
Fuel407
 2
Purchased power20
 (21)
Other operations and maintenance283
 (30)
Depreciation and amortization192
 23
Taxes other than income taxes113
 6
Estimated loss on Kemper IGCC24
 (13)
Total operating expenses1,039
 (33)
Operating income225
 32
Allowance for equity funds used during construction1
 1
Interest expense, net of amounts capitalized69
 (7)
Other income (expense), net12
 (5)
Income taxes (benefit)30
 132
Net income139
 (97)
Dividends on preferred stock
 (1)
Net income after dividends on preferred stock$139
 $(96)
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were approximately $1.3 billion, a $1 million decrease from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$889
  
Estimated change resulting from —   
Rates and pricing31
  
Weather(2)  
Fuel and other cost recovery(41)  
Retail — current year877
 $889
Wholesale revenues —   
Non-affiliates237
 263
Affiliates132
 91
Total wholesale revenues369
 354
Other operating revenues18
 22
Total operating revenues$1,264
 $1,265
Percent change(0.1)% 6.6%
Total retail revenues for 2019 decreased $12 million, or 1.3%, compared to 2018 primarily due to a fuel rate decrease that became effective for the first billing cycle of February 2019. This decrease was largely offset by an increase in rates and pricing, primarily related to PEP and ECO Plan rate changes that became effective for the first billing cycle of September 2018, net of a new tolling arrangement accounted for as a sales-type lease effective January 2019. See Note 2 to the financial statements under "Mississippi PowerEnvironmental Compliance Overview Plan" and " – Performance Evaluation Plan" and Note 9 to the financial statements under "Lessor" for additional information.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales and weather.
Electric rates for Mississippi Power include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of purchased power costs, and do not affect net income. Recoverable fuel costs include fuel and purchased power expenses reduced by the fuel and emissions portion of wholesale revenues from energy sold to customers outside Mississippi Power's service territory. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersMississippi PowerFuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities, including FERC-regulated MRA sales as well as market-based sales, were as follows:
 2019 2018
 (in millions)
Capacity and other$3
 $6
Energy234
 257
Total non-affiliated$237
 $263
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Mississippi Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. In addition, Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers. Short-term opportunity energy sales are also included in sales for resale to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Mississippi Power's variable cost to produce the energy.
Wholesale revenues from sales to non-affiliates decreased $26 million, or 9.9%, compared to 2018. This decrease primarily reflects decreases of $14 million from lower fuel prices, $6 million from decreased customer usage, and $8 million from lower PPA capacity and energy sales.
Wholesale revenues from sales to affiliates will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost.
Wholesale revenues from sales to affiliates increased $41 million, or 45.1%, in 2019 compared to 2018. This increase was primarily due to a $76 million increase associated with higher KWH sales due to the dispatch of Mississippi Power's lower cost generation resources to serve the Southern Company system's territorial load, partially offset by a $35 million decrease associated with lower natural gas prices.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 Weather-Adjusted Percent Change
 (in millions)    
Residential2,062
 (2.4)% (0.8)%
Commercial2,715
 (2.9) (2.7)
Industrial4,795
 (2.6) (2.6)
Other36
 (1.9) (1.9)
Total retail9,608
 (2.7) (2.2)%
Wholesale     
Non-affiliated3,966
 (0.3)  
Affiliated4,758
 84.1
  
Total wholesale8,724
 32.9
  
Total energy sales18,332
 11.5 %  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales decreased 2.7% in 2019 as compared to the prior year, primarily due to decreased demand by several large industrial customers. Weather-adjusted residential and commercial KWH sales decreased 0.8% and 2.7%, respectively, in 2019 primarily due to decreased customer usage as a result of an increase in energy saving initiatives, slightly offset by customer growth.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues to affiliated companies.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Mississippi Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Mississippi Power's generation and purchased power were as follows:
 2019 2018
Total generation (in millions of KWHs)
18,269
 15,966
Total purchased power (in millions of KWHs)
529
 960
Sources of generation (percent) –
   
Gas94
 93
Coal6
 7
Cost of fuel, generated (in cents per net KWH) –
   
Gas2.26
 2.65
Coal4.05
 3.50
Average cost of fuel, generated (in cents per net KWH)
2.37
 2.72
Average cost of purchased power (in cents per net KWH)
3.71
 4.27
Fuel and purchased power expenses were $427 million in 2019, a decrease of $19 million, or 4.3%, as compared to the prior year. The decrease was primarily due to parent companya $60 million decrease related to the average cost of fuel and purchased power primarily due to the lower average cost of natural gas, partially offset by a $41 million net increase associated with the volume of KWHs generated and purchased primarily due to the availability of Mississippi Power's lower-cost generation resources.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through Mississippi Power's fuel cost recovery clauses. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersMississippi PowerFuel Cost Recovery" herein and Note 1 to the financial statements under "Fuel Costs" for additional information.
Fuel
Fuel expense increased $2 million, or 0.5%, in 2019 compared to 2018 primarily due to a 15% increase in the volume of $14KWHs generated, partially offset by a 13% net decrease in the average cost of fuel per KWH generated.
Purchased Power
Purchased power expense decreased $21 million, or 51.2%, in 2019 compared to 2018. The decrease was primarily the result of a 45% decrease in the volume of KWHs purchased due to the availability of Mississippi Power's lower-cost generation resources and a 13% decrease in the average cost per KWH purchased.
Energy purchases will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $30 million, or 9.6%, in 2019 compared to the prior year. The decrease was primarily due to decreases of $21 million in compensation and benefit expenses primarily due to an employee attrition plan implemented in the third quarter 2018, $5 million in amortization of previously deferred Plant Ratcliffe expenses as a result of a settlement agreement reached with wholesale customers (MRA Settlement Agreement), $5 million in planned generation outage costs, and $4 million in Plant Ratcliffe waste water treatment expenses. These decreases were partially offset by a $9 million increase in overhead line maintenance and vegetation management expenses. See Note 2 to the financial statements under "Mississippi PowerMunicipal and Rural Associations Tariff" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $23 million, or 13.6%, in 2019 compared to 2018 primarily related to increases in amortization associated with ECO Plan regulatory assets. See Note 2 to the financial statements under "Mississippi Power – Environmental Compliance Overview Plan" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Taxes Other Than Income Taxes
Taxes other than income taxes increased $6 million, or 5.6%, in 2019 compared to 2018 primarily due to increases of $4 million in ad valorem taxes and $2 million in franchise taxes.
Estimated Loss on Kemper IGCC
In 2019 and 2018, charges of $24 million and $37 million, respectively, were recorded associated with the abandonment and closure activities and period costs, net of sales proceeds for the mine and gasifier-related assets. The 2019 charge primarily related to the expected close out of a DOE contract related to the Kemper County energy facility. See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized decreased $7 million, or 9.2%, in 2019 compared to 2018, primarily as the result of a decrease in outstanding long-term borrowings. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net decreased $5 million in 2019 compared to 2018. The decrease was primarily due to the $24 million settlement of Mississippi Power's Deepwater Horizon claim in 2018, partially offset by a $9 million increase in interest income associated with a new tolling arrangement accounted for as a sales-type lease and a $7 million decrease in charitable donations. See Notes 3 and 9 to the financial statements under "Other MattersMississippi Power" and "Lessor," respectively, for additional information.
Income Taxes (Benefit)
Income tax expense increased $132 million, or 129.4%, in 2019 compared to 2018 primarily due to a $92 million increase related to the 2018 reduction of a valuation allowance for a state income tax net operating loss (NOL) carryforward, a $42 million increase associated with the revaluation of deferred tax assets related to the Kemper IGCC recorded in 2018 in accordance with the Tax Reform Legislation, and a $9 million increase due to higher pre-tax earnings in 2019. These increases were partially offset by $15 million associated with the flowback of excess deferred income taxes resulting from the MRA Settlement Agreement and a new tolling arrangement accounted for as a sales-type lease. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information.
Southern Power
Net income attributable to Southern Power for 2019 was $339 million, a $152 million increase from 2018, primarily due to net impacts totaling approximately $141 million from the dispositions of the Florida Plants in 2018 and Plant Nacogdoches in the second quarter 2019, which include an asset impairment charge in 2018, a gain on sale in 2019 (including the recognition of deferred ITCs), and a decrease in operations and maintenance expense, partially offset by PPA capacity revenue decreases in 2019. The increase in net income also reflects $79 million in tax expense recognized in 2018 related to the Tax Reform Legislation, a $27 million wind turbine equipment impairment charge in 2018, and net gains in 2019 of $25 million from the Roserock solar facility litigation settlement and sales of wind equipment. These increases were partially offset by $65 million in state income tax benefits recorded in 2018 arising from the reorganization of Southern Power's legal entities and reductions in net income of approximately $60 million related to the SP Wind tax equity partnership entered into in 2018.
See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information on the Florida Plants and Plant Nacogdoches dispositions and sales of wind turbine equipment. See Notes 7 and 10 to the financial statements under "Southern Power" and "Legal Entity Reorganizations" for additional information on the tax equity partnerships and the legal entity reorganization, respectively. Also see Note 3 to the financial statements under "General Litigation – Southern Power" for additional information on the Roserock solar facility litigation settlement.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$1,938
 $(267)
Fuel577
 (122)
Purchased power108
 (68)
Other operations and maintenance359
 (36)
Depreciation and amortization479
 (14)
Taxes other than income taxes40
 (6)
Asset impairment3
 (153)
Gain on disposition(23) (21)
Total operating expenses1,543
 (420)
Operating income395
 153
Interest expense, net of amounts capitalized169
 (14)
Other income (expense), net47
 24
Income taxes (benefit)(56) 108
Net income329
 83
Net income (loss) attributable to noncontrolling interests(10) (69)
Net income attributable to Southern Power$339
 $152
Operating Revenues
Total operating revenues include PPA capacity revenues, which are derived primarily from long-term contracts involving natural gas facilities and a biomass generating facility (through the second quarter 2019 sale of Plant Nacogdoches), and PPA energy revenues from Southern Power's generation facilities. To the extent Southern Power has capacity not contracted under a PPA, it may sell power into an accessible wholesale market, or, to the extent those generation assets are part of the FERC-approved IIC, it may sell power into the Southern Company power pool.
Natural Gas and Biomass Capacity and Energy Revenue
Capacity revenues generally represent the greatest contribution to operating income and are designed to provide recovery of fixed costs plus a return on investment.
Energy is generally sold at variable cost or is indexed to published natural gas indices. Energy revenues will vary depending on the energy demand of Southern Power's customers and their generation capacity, as well as the market prices of wholesale energy compared to the cost of Southern Power's energy. Energy revenues also include fees for support services, fuel storage, and unit start charges. Increases and decreases in energy revenues under PPAs that are driven by fuel or purchased power prices are accompanied by an increase or decrease in fuel and purchased power costs and do not have a significant impact on net income.
Solar and Wind Energy Revenue
Southern Power's energy sales from solar and wind generating facilities are predominantly through long-term PPAs that do not have capacity revenue. Customers either purchase the energy output of a dedicated renewable facility through an energy charge or pay a fixed price related to the energy generated from the respective facility and sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors.
See FUTURE EARNINGS POTENTIAL – "Southern Power's Power Sales Agreements" herein for additional information regarding Southern Power's PPAs.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues Details
Details of Southern Power's operating revenues were as follows:
 2019 2018
 (in millions)
PPA capacity revenues$482
 $580
PPA energy revenues1,081
 1,140
Total PPA revenues1,563
 1,720
Non-PPA revenues363
 472
Other revenues12
 13
Total operating revenues$1,938
 $2,205
Operating revenues for 2019 were $1.9 billion, a $267 million, or 12%, decrease from 2018. The decrease in operating revenues was primarily due to the following:
PPA capacity revenuesdecreased $98 million, or 17%, primarily due to the sales of the Florida Plants in December 2018 and Plant Nacogdoches in June 2019. In addition, the change reflects a reduction of $34 million from the expiration of an affiliate natural gas PPA, offset by a $36 million increase in new PPA capacity revenues from existing natural gas facilities, of which $13 million related to the expansion unit at Plant Mankato.
PPA energy revenues decreased $59 million, or 5%, primarily due to a $67 million decrease in sales from natural gas facilities primarily driven by a $103 million decrease in the average cost of fuel and purchased power, partially offset by a $36 million increase in the volume of KWHs sold due to increased customer load.
Non-PPA revenues decreased $109 million, or 23%, primarily due to a $72 million decrease in the volume of KWHs sold through short-term sales and a $37 million decrease in the market price of energy.
Fuel and Purchased Power Expenses
Details of Southern Power's generation and purchased power were as follows:
 Total
KWHs
Total KWH % ChangeTotal
KWHs
 2019 2018
 (in billions of KWHs)
Generation47 46
Purchased power3 4
Total generation and purchased power50—%50
Total generation and purchased power, excluding solar, wind, and tolling agreements29—%29
Southern Power's PPAs for natural gas generation generally provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel relating to the energy delivered under such PPAs. Consequently, changes in such fuel costs are generally accompanied by a corresponding change in related fuel revenues and do not have a significant impact on net income. Southern Power is responsible for the cost of fuel for generating units that are not covered under PPAs. Power from these generating units is sold into the wholesale market or into the Southern Company power pool for capacity owned directly by Southern Power.
Purchased power expenses will vary depending on demand, availability, and the cost of generating resources throughout the Southern Company system and other contract resources. Load requirements are submitted to the Southern Company power pool on an hourly basis and are fulfilled with the lowest cost alternative, whether that is generation owned by Southern Power, an affiliate company, or external parties. Such purchased power costs are generally recovered through PPA revenues.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Southern Power's fuel and purchased power expenses were as follows:
 2019 2018
 (in millions)
Fuel$577
 $699
Purchased power108
 176
Total fuel and purchased power expenses$685
 $875
In 2019, total fuel and purchased power expenses decreased $190 million, or 22%, compared to 2018. Fuel expensedecreased $122 million, or 17%, due to a $137 million decrease in the average cost of fuel per KWH generated, partially offset by a $15 million increase associated with bridge financingthe volume of KWHs generated. Purchased power expense decreased $68 million, or 39%, due to a $37 million decrease associated with the average cost of purchased power and a $31 million decrease associated with the volume of KWHs purchased.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses decreased $36 million, or 9%, compared to 2018. The decrease was due to gains totaling $17 million on the sale of wind turbine equipment, decreased expense of $17 million related to the dispositions of the Florida Plants and Plant Nacogdoches, and the recovery of $5 million in legal costs related to the Roserock solar facility litigation settlement in the first quarter 2019. See Note 15 to the financial statements under "Southern PowerDevelopment Projects" and " – Sales of Natural Gas and Biomass Plants" for additional information on the Merger.sale of wind turbine equipment and the dispositions, respectively. Also see Note 3 to the financial statements under "General Litigation Matters – Southern Power" for additional information on the litigation settlement.
Asset Impairment
Asset impairment charges totaling $156 million were recorded in 2018, including $119 million related to the sale of the Florida Plants and $36 million related to wind turbine equipment held for development projects. Asset impairment charges in 2019 were immaterial. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information.
Gain on Dispositions, Net
The sale of Plant Nacogdoches in 2019 resulted in a $23 million gain. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
Interest Expense, Net of Amounts Capitalized
InterestIn 2019, interest expense, for these other business activities increased $239net of amounts capitalized decreased $14 million, or 362.1%8%, compared to 2018, primarily due to a decrease in 2016the amount of outstanding debt.
Other Income (Expense), Net
In 2019, other income (expense), net increased $24 million, or 104%, compared to 2018 primarily due to a $36 million gain arising from the Roserock solar facility litigation settlement in 2019, partially offset by a $14 million gain from a joint-development wind project in 2018 attributable to Southern Power's partner in the project, which was offset by a $14 million loss within noncontrolling interests. See Note 3 to the financial statements under "Southern Power" for additional information regarding the litigation settlement.
Income Taxes (Benefit)
In 2019, income tax benefit was $56 million compared to $164 million for 2018, a decrease of $108 million, primarily attributable to reductions in tax benefits of $127 million from wind PTCs primarily following the 2018 sale of a noncontrolling tax equity interest in SP Wind and $65 million from changes in state apportionment rates following the 2018 reorganizations of certain legal entities, as well as a $64 million increase in income tax expense as a result of higher pre-tax earnings, partially offset by $79 million in tax expense recognized in 2018 related to the Tax Reform Legislation and a $75 million tax benefit resulting from the recognition of deferred ITCs remaining from the original construction recognized in connection with the sale of Plant Nacogdoches.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

See FUTURE EARNINGS POTENTIAL – "Income Tax MattersFederal Tax Reform Legislation" herein and Notes 1, 10, and 15 to the financial statements under "Income Taxes," "Effective Tax Rate," and "Southern Power," respectively, for additional information.
Net Income Attributable to Noncontrolling Interests
In 2019, net income attributable to noncontrolling interests decreased $69 million, or 117%, compared to 2018. The decrease was primarily due to $92 million of losses attributable to noncontrolling interests related to the tax equity partnerships entered into in 2018 and $14 million attributable to a joint-development wind project in 2018, partially offset by an allocation of approximately $29 million of income to the noncontrolling interest partner related to the Roserock solar facility litigation settlement. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and Note 7 to the financial statements under "Southern Power" for additional information regarding the litigation settlement and tax equity partnerships, respectively.
Southern Company Gas
Operating Metrics
Southern Company Gas continues to focus on several operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
Southern Company Gas measures weather and the effect on its business using Heating Degree Days. Generally, increased Heating Degree Days result in higher demand for natural gas on Southern Company Gas' distribution system. Southern Company Gas has various regulatory mechanisms, such as weather and revenue normalization and straight-fixed-variable rate design, which limit its exposure to weather changes within typical ranges in each of its utility's respective service territory, including Nicor Gas following the approval of a revenue decoupling mechanism for residential customers in its recent rate case. Southern Company Gas also utilizes weather hedges to limit the negative income impacts in the event of warmer-than-normal weather.
The number of customers served by gas distribution operations and gas marketing services can be impacted by natural gas prices, economic conditions, and competition from alternative fuels. Gas distribution operations and gas marketing services' customers are primarily located in Georgia and Illinois.
Southern Company Gas' natural gas volume metrics for gas distribution operations and gas marketing services illustrate the effects of weather and customer demand for natural gas. Wholesale gas services' physical sales volumes represent the daily average natural gas volumes sold to its customers.
Seasonality of Results
During the Heating Season, natural gas usage and operating revenues are generally higher as more customers are connected to the gas distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, wholesale gas services' operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively evenly throughout the year. Seasonality also affects the comparison of certain balance sheet items across quarters, including receivables, unbilled revenues, natural gas for sale, and notes payable. However, these items are comparable when reviewing Southern Company Gas' annual results. Thus, Southern Company Gas' operating results can vary significantly from quarter to quarter as a result of seasonality, which is illustrated in the table below.
  
Percent Generated During
Heating Season
  Operating Revenues 
Net
Income
2019 68.7% 86.8%
2018 68.7% 96.0%
Net Income
Net income attributable to Southern Company Gas in 2019 was $585 million, an increase of $213 million, or 57.3%, compared to the prior year. The change in net income includes a $125 million increase at wholesale gas services, an increase of $57 million in continued investment in infrastructure replacement programs and base rate changes at gas distribution operations, net of depreciation, a $34 million decrease in income taxes primarily at Atlanta Gas Light due to increased flowback of excess deferred income taxes in lieu of a rate increase as previously authorized by the Georgia PSC, and an $11 million increase in earnings from equity method investments in 2019. This increase also includes a $51 million net loss in 2018 from the Southern Company Gas
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Dispositions (including the goodwill impairment charge) and $21 million in disposition-related costs in 2018, partially offset by $86 million in after-tax impairment charges in 2019. See Notes 3 and 15 to the financial statements under "Other MattersSouthern Company Gas" and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on the impairment charges. See Note 2 to the financial statements under "Southern Company Gas – Rate Proceedings – Nicor Gas" and " – Atlanta Gas Light" for additional information on the impacts of the Tax Reform Legislation. Also see FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
A condensed income statement for Southern Company Gas follows:
 2019 Increase (Decrease) from 2018
 (in millions)
Operating revenues$3,792
 $(117)
Cost of natural gas1,319
 (220)
Cost of other sales
 (12)
Other operations and maintenance888
 (93)
Depreciation and amortization487
 (13)
Taxes other than income taxes213
 2
Impairment charges115
 73
(Gain) loss on dispositions, net
 291
Total operating expenses3,022
 28
Operating income770
 (145)
Earnings from equity method investments157
 9
Interest expense, net of amounts capitalized232
 4
Other income (expense), net20
 19
Earnings before income taxes715
 (121)
Income taxes130
 (334)
Net Income$585
 $213
The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for 2019 compared to 2018. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Southern Company Gas Dispositions.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues in 2019 were $3.8 billion, a $117 million decrease, compared to 2018. Details of operating revenues were as follows:
 2019
 (in millions)
Operating revenues – prior year$3,909
Estimated change resulting from –
Infrastructure replacement programs and base rate changes96
Gas costs and other cost recovery(89)
Wholesale gas services150
Southern Company Gas Dispositions(*)
(300)
Other26
Operating revenues – current year$3,792
Percent change(3.0)%
(*)
Includes a $245 million decrease related to natural gas revenues, including alternative revenue programs, and a $55 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2019 compared to the prior year primarily due to an increaseincreases of $74 million at Nicor Gas and $16 million at Atlanta Gas Light. These amounts include gas distribution operations' continued investments recovered through infrastructure replacement programs and base rate increases as well as customer refunds in outstanding long-term debt at the parent company primarily relating to financing2018 as a portionresult of the purchase priceTax Reform Legislation. See Note 2 to the financial statements under "Southern Company Gas" for the Merger. Interest expense for theseadditional information.
Revenues associated with gas costs and other business activities increased $25 million, or 61.0%,cost recovery decreased in 2015 as2019 compared to the prior year primarily due to lower natural gas prices and decreased volumes of natural gas sold. Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. See "Cost of Natural Gas" herein for additional information.
Revenues from wholesale gas services increased in 2019 primarily due to derivative gains, partially offset by decreased commercial activity. See "Segment InformationWholesale Gas Services" herein for additional information.
Other revenues increased in 2019 primarily due to increases in customers at gas distribution operations and recovery of prior period hedge losses at gas marketing services.
Heating Degree Days
During Heating Season, natural gas usage and operating revenues are generally higher. Weather typically does not have a significant net income impact other than during the Heating Season. The following table presents the Heating Degree Days information for Illinois and Georgia, the primary locations where Southern Company Gas' operations are impacted by weather.
  Years Ended December 31, 2019 vs. normal 2019 vs. 2018
  
Normal(a)
 2019 2018 colder (warmer) colder (warmer)
  (in thousands)    
Illinois(b)
 5,782
 6,136
 6,101
 6.1 % 0.6 %
Georgia 2,529
 2,157
 2,588
 (14.7)% (16.7)%
(a)Normal represents the 10-year average from January 1, 2009 through December 31, 2018 for Illinois at Chicago Midway International Airport and for Georgia at Atlanta Hartsfield-Jackson International Airport, based on information obtained from the National Oceanic and Atmospheric Administration, National Climatic Data Center.
(b)Heating Degree Days in Illinois are expected to have a limited financial impact in future years. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas hedged its exposure to warmer-than-normal weather in Illinois for gas distribution operations and in Illinois and Georgia for gas marketing services. The remaining impacts of weather on earnings were immaterial.
Customer Count
The following table provides the number of customers served by Southern Company Gas at December 31, 2019 and 2018:
  2019 2018
  (in thousands, except market share %)
Gas distribution operations 4,277
 4,248
Gas marketing services    
Energy customers(*)
 631
 697
Market share of energy customers in Georgia 28.9% 29.0%
(*)Gas marketing services' customers are primarily located in Georgia and Illinois. Also included as of December 31, 2018 were approximately 70,000 customers in Ohio contracted through an annual auction process to serve for 12 months beginning April 1, 2018.
Southern Company Gas anticipates overall customer growth trends in gas distribution operations to continue as it expects continued improvement in the new housing market and low natural gas prices. Southern Company Gas uses a variety of targeted marketing programs to attract new customers and to retain existing customers.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, gas distribution operations charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Gas distribution operations defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. Cost of natural gas at gas distribution operations represented 84.5% of the total cost of natural gas for 2019.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
In 2019, cost of natural gas was $1.3 billion, a decrease of $220 million, or 14.3%, compared to the prior year. Excluding a $106 million decrease related to the Southern Company Gas Dispositions, cost of natural gas decreased by $114 million, which reflects a 14.8% decrease in natural gas prices compared to 2018.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Volumes of Natural Gas Sold
The following table details the volumes of natural gas sold during all periods presented.
   2019 vs. 2018
 2019 2018 % Change
Gas distribution operations (mmBtu in millions)     
Firm677
 721
 (6.1)%
Interruptible92
 95
 (3.2)%
Total(*)769
 816
 (5.8)%
Wholesale gas services (mmBtu in millions/day)     
Daily physical sales6.4
 6.7
 (4.5)%
Gas marketing services (mmBtu in millions)     
Firm:     
Georgia33
 37
 (10.8)%
Illinois12
 13
 (7.7)%
Other15
 20
 (25.0)%
Interruptible large commercial and industrial14
 14
  %
Total74
 84
 (11.9)%
(*)Includes total volumes of natural gas sold of 38 mmBtu for 2018 related to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold in July 2018. See Note 15 to the financial statements under "Southern Company Gas – Sale of Elizabethtown Gas and Elkton Gas" and " – Sale of Florida City Gas" for additional information.
Cost of Other Sales
Cost of other sales related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses decreased $93 million, or 9.5%, compared to the prior year. Excluding a $65 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses decreased $28 million. This decrease was primarily due to $28 million of disposition-related costs incurred during 2018, a $12 million adjustment in 2018 for the adoption of a new paid time off policy, an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions in 2018, and a $7 million decrease in compensation and benefits costs, partially offset by a $22 million increase in outstanding long-term debt.rider expenses, primarily at Nicor Gas, passed through directly to customers. See FUTURE EARNINGS POTENTIAL – "Southern Company GasUtility Regulation and Rate Design" herein for additional information.
Income TaxesDepreciation and Amortization
Income taxes for these other business activitiesIn 2019, depreciation and amortization decreased $84$13 million, or 63.6%2.6%, compared to the prior year. Excluding a $27 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $14 million. This increase was primarily due to continued infrastructure investments at gas distribution operations, partially offset by accelerated depreciation related to assets retired in 2016 as2018. See Note 2 to the financial statements under "Southern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information.
Impairment Charges
In 2019, Southern Company Gas recorded impairment charges of $91 million related to a natural gas storage facility in Louisiana and $24 million in contemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. In 2018, a goodwill impairment charge of $42 million was recorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1, 3, and 15 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities," "Other MattersSouthern Company Gas," and "Southern Company Gas," respectively, for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(Gain) Loss on Dispositions, Net
In 2018, gain on dispositions, net was $291 million and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
In 2019, earnings from equity method investments increased $9 million, or 6.1%, compared to the prior year primarilyand reflect higher earnings from SNG as a result of rate increases that became effective September 2018, partially offset by a $6 million pre-tax loss on the sale of Triton in May 2019. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Other Income (Expense), Net
In 2019, other income (expense), net increased $19 million compared to the prior year. This increase primarily resulted from a $23 million decrease in charitable donations in 2019.
Income Taxes
In 2019, income taxes decreased $334 million, or 72.0%, compared to the prior year. This decrease primarily reflects a reduction of $348 million related to the Southern Company Gas Dispositions, as well as $29 million in benefits associated with impairment charges in 2019 and additional benefits from the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light as previously authorized by the Georgia PSC, partially offset by $48 million of additional taxes associated with increased pre-tax earnings at wholesale gas services.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information. Also see Notes 2, 3, and 15 to the financial statements under "Southern Company Gas," "Other MattersSouthern Company Gas," and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on Atlanta Gas Light's regulatory treatment of the impacts of the Tax Reform Legislation and the impairment charges.
Performance and Non-GAAP Measures
Adjusted operating margin is a non-GAAP measure that is calculated as operating revenues less cost of natural gas, cost of other sales, and revenue tax expense. Adjusted operating margin excludes other operations and maintenance expenses, depreciation and amortization, taxes other than income taxes, impairment charges, and gain (loss) on dispositions, net, which are included in the calculation of operating income as calculated in accordance with GAAP and reflected in the statements of income. The presentation of adjusted operating margin is believed to provide useful information regarding the contribution resulting from base rate changes, infrastructure replacement programs and capital projects, and customer growth at gas distribution operations since the cost of natural gas and revenue tax expense can vary significantly and are generally billed directly to customers. Southern Company Gas further believes that utilizing adjusted operating margin at gas pipeline investments, wholesale gas services, and gas marketing services allows it to focus on a direct measure of performance before overhead costs. The applicable reconciliation of operating income to adjusted operating margin is provided herein.
Adjusted operating margin should not be considered an alternative to, or a more meaningful indicator of, Southern Company Gas' operating performance than operating income as determined in accordance with GAAP. In addition, Southern Company Gas' adjusted operating margin may not be comparable to similarly titled measures of other companies.
Detailed variance explanations of Southern Company Gas' financial performance are provided herein.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Reconciliations of operating income to adjusted operating margin are as follows:
 2019 2018
 (in millions)
Operating Income$770
 $915
Other operating expenses(a)
1,703
 1,443
Revenue taxes(b)
(114) (111)
Adjusted Operating Margin$2,359
 $2,247
(a)Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, impairment charges, and gain (loss) on dispositions, net.
(b)Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Segment Information
   2019 2018
  
 Adjusted Operating Margin(a)
 
Operating Expenses(a)
 Net Income (Loss) 
 Adjusted Operating Margin(a)
 
Operating Expenses (a)(b)
 
Net Income (Loss)(b)
  (in millions) (in millions)
Gas distribution operations $1,799
 $1,226
 $337
 $1,794
 $890
 $334
Gas pipeline investments 32
 12
 94
 32
 12
 103
Wholesale gas services 273
 54
 163
 134
 64
 38
Gas marketing services 234
 122
 83
 263
 244
 (40)
All other 28
 182
 (92) 33
 131
 (63)
Intercompany eliminations (7) (7) 
 (9) (9) 
Consolidated $2,359
 $1,589
 $585
 $2,247
 $1,332
 $372
(a)Adjusted operating margin and operating expenses are adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
(b)
Operating expenses for gas distribution operations and gas marketing services include the gain on dispositions, net. Net income for gas distribution operations and gas marketing services includes the gain on dispositions, net and the associated income tax expense. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Gas Distribution Operations
Gas distribution operations is the largest component of Southern Company Gas' business and is subject to regulation and oversight by agencies in each of the states it serves. These agencies approve natural gas rates designed to provide Southern Company Gas with the opportunity to generate revenues to recover the cost of natural gas delivered to its customers and its fixed and variable costs, including depreciation, interest expense, operations and maintenance, taxes, and overhead costs, and to earn a reasonable return on its investments.
With the exception of Atlanta Gas Light, Southern Company Gas' second largest utility that operates in a deregulated natural gas market and has a straight-fixed-variable rate design that minimizes the variability of its revenues based on consumption, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are a function of weather conditions, price levels for natural gas, and general economic conditions that may impact customers' ability to pay for natural gas consumed. Southern Company Gas has various weather mechanisms, such as weather normalization mechanisms and weather derivative instruments, that limit its exposure to weather changes within typical ranges in its natural gas distribution utilities' service territories.
In July 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Also in July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table details the results of gas distribution operations including and excluding the impact of the utilities sold in 2018.
Favorable(unfavorable) 2019 vs 2018 Impacts of Utilities Sold in 2018 Variance Excluding Utilities Sold in 2018
  (in millions)
Adjusted Operating Margin $5
 $138
 $143
Operating expenses (336) 246
 (90)
Other income (expense), net (3) 
 (3)
Interest expenses (9) (13) (22)
Income tax expense 346
 (315) 31
Net income $3
 $56
 $59
Excluding the impact of the utilities sold in 2018, net income in 2019 increased $59 million, or 21.2%, compared to the prior year. The $143 million increase in adjusted operating margin reflects additional revenue from base rate increases and continued investment recovered through infrastructure replacement programs, a decrease in refunds associated with bad debt riders, and the customer refunds in 2018 as a result of the Tax Reform Legislation. The $90 million increase in operating expenses includes increases in compensation and benefit costs and rider expenses passed through directly to customers, as well as additional depreciation primarily due to additional assets placed in service. The $3 million decrease in other income (expense), net is primarily due to a contractor litigation settlement in 2018. The $22 million increase in interest expense is primarily from the issuance of first mortgage bonds at Nicor Gas. The $31 million decrease in income tax expense is primarily due to an increase in the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light.
See Note 2 to the financial statements under "Southern Company GasRate ProceedingsAtlanta Gas Light" and " – Infrastructure Replacement Programs and Capital ProjectsAtlanta Gas LightPRP" herein for additional information on Atlanta Gas Light's stipulation reflecting the impacts of the Tax Reform Legislation and the contractor litigation settlement, respectively.
Gas Pipeline Investments
Gas pipeline investments consists primarily of joint ventures in natural gas pipeline investments including SNG, Atlantic Coast Pipeline, PennEast Pipeline, and Dalton Pipeline. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Net income in 2019 decreased $9 million, or 8.7%, compared to the prior year. This decrease primarily relates to an increase in tax expense due to changes in pre-taxstate apportionment rates, partially offset by higher earnings (losses)from SNG.
Wholesale Gas Services
Wholesale gas services is involved in asset management and optimization, storage, transportation, producer and peaking services, natural gas supply, natural gas services, and wholesale gas marketing. Southern Company Gas has positioned the business to generate positive economic earnings on an annual basis even under low volatility market conditions that can result from a number of factors. When market price volatility increases, wholesale gas services is well positioned to capture significant value and generate stronger results. Operating expenses primarily reflect employee compensation and benefits.
Net income in 2019 increased $125 million, or 328.9%, compared to the prior year. This increase primarily relates to a $139 million increase in adjusted operating margin, a $10 million decrease in operating expenses, and a $20 million increase in other income (expense), partially offset by statea $48 million increase in income tax benefits realizedtaxes.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of adjusted operating margin are provided in 2015. Income taxes for these other business activities decreased $56 million, or 73.7%,the table below.
 2019 2018
 (in millions)
Commercial activity recognized$54
 $254
Gain on storage derivatives40
 9
Gain (loss) on transportation and forward commodity derivatives186
 (119)
LOCOM adjustments, net of current period recoveries(16) (7)
Purchase accounting adjustments to fair value inventory and contracts9
 (3)
Adjusted operating margin$273
 $134
Change in 2015Commercial Activity
The commercial activity at wholesale gas services includes recognition of storage and transportation values that were generated in prior periods, which reflect the impact of prior period hedge gains and losses as associated physical transactions occur. The decrease in commercial activity in 2019 compared to the prior year was primarily due to significant natural gas price volatility that resulted from prolonged cold weather during 2018 coupled with low natural gas supply.
Change in Storage and Transportation Derivatives
Volatility in the natural gas market arises from a number of factors, such as weather fluctuations or changes in supply or demand for natural gas in different regions of the U.S. The volatility of natural gas commodity prices has a significant impact on Southern Company Gas' customer rates, long-term competitive position against other energy sources, and the ability of wholesale gas services to capture value from locational and seasonal spreads. Forward storage or time spreads applicable to the locations of wholesale gas services' specific storage positions in 2019 resulted in storage derivative gains. Transportation and forward commodity derivative gains in 2019 are primarily the result of narrowing transportation spreads due to supply constraints and increases in natural gas supply, which impacted forward prices at natural gas receipt and delivery points, primarily in the Northeast and Midwest regions.
The natural gas that wholesale gas services purchases and injects into storage is accounted for at the LOCOM value utilizing gas daily or spot prices at the end of the year. See Note 1 to the financial statements under "Natural Gas for Sale" for additional information.
Withdrawal Schedule and Physical Transportation Transactions
The expected natural gas withdrawals from storage and expected offset to prior hedge losses/gains associated with the transportation portfolio of wholesale gas services are presented in the following table, along with the net operating revenues expected at the time of withdrawal from storage and the physical flow of natural gas between contracted transportation receipt and delivery points. Wholesale gas services' expected net operating revenues exclude storage and transportation demand charges, as well as other variable fuel, withdrawal, receipt, and delivery charges, and exclude estimated profit sharing under asset management agreements. Further, the amounts that are realizable in future periods are based on the inventory withdrawal schedule, planned physical flow of natural gas between the transportation receipt and delivery points, and forward natural gas prices at December 31, 2019. A portion of wholesale gas services' storage inventory and transportation capacity is economically hedged with futures contracts, which results in the realization of substantially fixed net operating revenues.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Storage Withdrawal  
 
Total storage(a)
 
Expected net operating losses(b)
 
Physical Transportation Transactions – Expected Net Operating Gains(c)
 (in mmBtu in millions) (in millions) (in millions)
202061
 $6
 $(119)
2021 and thereafter
 
 (67)
Total at December 31, 201961
 $6
 $(186)
(a)At December 31, 2019, the WACOG of wholesale gas services' expected natural gas withdrawals from storage was $1.87 per mmBtu.
(b)Represents expected operating losses from planned storage withdrawals associated with existing inventory positions and could change as wholesale gas services adjusts its daily injection and withdrawal plans in response to changes in future market conditions and forward NYMEX price fluctuations.
(c)Represents the expected net gains during the periods in which the derivatives will be settled and the physical transportation transactions will occur that offset the derivative gains and losses previously recognized.
Gas Marketing Services
Gas marketing services provides energy-related products and services to natural gas markets and participants in customer choice programs that were approved in various states to increase competition. These programs allow customers to choose their natural gas supplier while the local distribution utility continues to provide distribution and transportation services. Gas marketing services is weather sensitive and uses a variety of hedging strategies, such as weather derivative instruments and other risk management tools, to partially mitigate potential weather impacts.
On June 4, 2018, Southern Company Gas completed the sale of Pivotal Home Solutions to American Water Enterprises LLC. See Note 15 under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Net income increased $123 million in 2019 compared to the prior year. This increase primarily relates to a $122 million decrease in operating expenses and a $27 million decrease in income tax expense, partially offset by a $29 million decrease in adjusted operating margin.
Excluding a $43 million decrease attributable to the 2018 disposition of Pivotal Home Solutions, adjusted operating margin increased $14 million, which primarily reflects favorable margins and recovery of prior period hedge losses. Excluding a $116 million decrease attributable to the 2018 disposition of Pivotal Home Solutions that includes the related goodwill impairment charge, operating expense decreased $6 million due to lower amortization of intangible assets. Excluding a $33 million decrease attributable to the 2018 disposition of Pivotal Home Solutions, income tax expense increased $6 million primarily due to higher pre-tax earnings.
All Other
All other includes Southern Company Gas' storage and fuels operations and its investment in Triton through completion of its sale on May 29, 2019, AGL Services Company, and Southern Company Gas Capital, as well as various corporate operating expenses that are not allocated to the reportable segments and interest income (expense) associated with affiliate financing arrangements.
Net loss increased $29 million, or 46.0%, in 2019 compared to the prior year. This increase primarily reflects a $51 million increase in operating expenses, partially offset by a $39 million decrease in income taxes. The increase in operating expenses primarily reflects a $91 million impairment charge related to a natural gas storage facility in Louisiana and a $24 million impairment charge in contemplation of the sale of Southern Company Gas' interests in Pivotal LNG and Atlantic Coast Pipeline, partially offset by a $12 million one-time adjustment in the first quarter 2018 for the adoption of a new paid time off policy, $28 million of disposition-related costs incurred during 2018, and a $14 million decrease in depreciation and amortization. The decrease in income taxes reflects a $29 million benefit due to the impairment charge, a $13 million benefit related to the reversal of a federal income tax valuation allowance in connection with the sale of Triton, the impact of deferred tax expenses related to the enactment of the State of Illinois income tax legislation in 2018, and changes in state income tax benefits realizedapportionment factors in 2015several states during 2019. See Note 3 to the financial statements under "Other MattersSouthern Company Gas," Note 10 to the financial statements, and changesNote 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Segment Reconciliations
Reconciliations of operating income to adjusted operating margin for 2019 and 2018 are provided in pre-tax earnings (losses).the following tables. See Note 16 to the financial statements under "Southern Company Gas" for additional segment information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 2019
 Gas Distribution OperationsGas Pipeline InvestmentsWholesale Gas ServicesGas Marketing ServicesAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$573
$20
$219
$112
$(154)$
$770
Other operating expenses(a)
1,340
12
54
122
182
(7)1,703
Revenue tax expense(b)
(114)




(114)
Adjusted Operating Margin$1,799
$32
$273
$234
$28
$(7)$2,359
 2018
 Gas Distribution OperationsGas Pipeline InvestmentsWholesale Gas ServicesGas Marketing ServicesAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$904
$20
$70
$19
$(98)$
$915
Other operating expenses(a)
1,001
12
64
244
131
(9)1,443
Revenue tax expense(b)
(111)




(111)
Adjusted Operating Margin$1,794
$32
$134
$263
$33
$(9)$2,247
(a)Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, impairment charges, and (gain) loss on dispositions, net.
(b)Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Effects of Inflation
The traditional electric operating companies and the natural gas distribution utilities are subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Southern Power is party to long-term contracts reflecting market-based rates, including inflation expectations. Any adverse effect of inflation on Southern Company'sthe Registrants' results of operations has not been substantial in recent years. See Note 2 to the financial statements for additional information on rate regulation.
FUTURE EARNINGS POTENTIAL
General
The fourPrices for electric service provided by the traditional electric operating companies operate as vertically integrated utilities providing electric service to customers within their service territories inand natural gas distributed by the Southeast. The seven natural gas distribution utilities provide service to customers in their service territories in Illinois, Georgia, Virginia, New Jersey, Florida, Tennessee, and Maryland. Prices for electricity provided and natural gas distributed to retail customers are set by state PSCs or other applicable state regulatory agencies under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales, and natural gas distribution, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Southern Power continues to focus on long-term PPAs. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and EstimatesUtility Regulation" herein and Note 32 to the financial statements for additional information about regulatory matters.
TheEach Registrant's results of operations for the past three years are not necessarily indicative of its future earnings potential. Recent disposition activities described under "Acquisitions and Dispositions" herein and in Note 15 to the financial statements will impact future earnings for the applicable Registrants. The level of Southern Company'sthe Registrants' future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Southern Company system'sRegistrants' primary businesses of selling electricity andand/or distributing natural gas. These factors includegas, as described further herein.
For the traditional electric operating companies' andcompanies, these factors include the natural gas distribution utilities' ability to maintain a constructive regulatory environmentenvironments that allowsallow for the timely recovery of prudently-incurred costs during a time of increasing costs, continued customer growth, and limited projected demand growth over the next several years. The completiontrend of reduced electricity usage per customer, especially in residential and subsequent operation of the Kemper IGCC andcommercial markets. Other major factors include Plant Vogtle Units 3 and 4 as well as other ongoing construction projects,and rate recovery related thereto for Georgia Power and the profitability of Southern Power's competitive wholesale business andability to prevail against legal challenges associated with the Kemper County energy facility for Mississippi Power.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report



successful additional investments in renewable and other energy projects are other major factors. Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction. The ultimate impact of any tax reform proposals, including any potential changes to the availability or realizability of ITCs and PTCs, is dependent on the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on Southern Company's financial statements.
Future earnings for the electricity and natural gas businesses will be driven primarily by customer growth. Earnings in the electricity business will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies, increasing volumes of electronic commerce transactions, and, higherfor Georgia Power, more multi-family home construction. Earnings for both the electricity and natural gas businesses are subjectconstruction, all of which could contribute to a variety of other factors. These factors include weather, competition, new energy contracts with other utilities and other wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the prices of electricity and natural gas, the price elasticity of demand, and the rate of economic growth or declinenet reduction in the service territory. In addition, thecustomer usage.
The level of future earnings for theSouthern Power's competitive wholesale electric business also depends on numerous factors including Southern Power's ability to execute its growth strategy through the development or acquisition of renewable facilities and other energy projects while containing costs, as well as regulatory matters, creditworthiness of customers, total electric generating capacity available in Southern Power's market areas, and related costs, future acquisitions and construction of electric generating facilities, the impact of tax credits from renewable energy projects, and the successful remarketing ofSouthern Power's ability to successfully remarket capacity as current contracts expire. DemandIn addition, renewable portfolio standards, transmission constraints, cost of generation from units within the Southern Company power pool, and operational limitations could influence Southern Power's future earnings.
The level of future earnings for electricity andSouthern Company Gas' primary business of distributing natural gas is primarily driven by economic growth. The pace of economic growth and electricityits complementary businesses in the gas pipeline investments, wholesale gas services, and gas marketing services sectors depends on numerous factors. These factors include the natural gas demand may be affected by changes in regionaldistribution utilities' ability to maintain constructive regulatory environments that allow for the timely recovery of prudently-incurred costs, the completion and global economic conditions, which may impact future earnings. In addition, thesubsequent operation of ongoing infrastructure and other construction projects, creditworthiness of customers, and Southern Company Gas' ability to optimize its transportation and storage positions and to re-contract storage rates at favorable prices. The volatility of natural gas prices has a significantan impact on the natural gas distribution utilities'Southern Company Gas' customer rates, its long-term competitive position against other energy sources, and the ability of Southern Company Gas' gas marketing services and wholesale gas services businesses to capture value from locational and seasonal spreads. Additionally, changes in commodity prices subject a significant portion of Southern Company Gas' operations to earnings variability. Over the longer term, volatility is expected to be low to moderate and locational and/or transportation spreads are expected to decrease as new pipelines are built to reduce the existing supply constraints in the shale areas of the Northeast U.S. To the extent these pipelines are further delayed or not built, volatility could increase. See "Construction Programs" herein for additional information on permitting challenges experienced by the Atlantic Coast Pipeline and the PennEast Pipeline. Additional economic factors may contribute to this environment, including a significant drop in oil and natural gas prices, which could lead to consolidation of natural gas producers or reduced levels of natural gas production. Further, if economic conditions continue to improve, the demand for natural gas may increase, which may cause natural gas prices to rise and drive higher volatility in the natural gas markets on a longer-term basis.
Earnings for both the electricity and natural gas businesses are subject to a variety of other factors. These factors include weather, competition, developing new and maintaining existing energy contracts and associated load requirements with wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the prices of electricity and natural gas, and the price elasticity of demand. Demand for electricity and natural gas in the Registrants' service territories is primarily driven by the pace of economic growth or decline that may be affected by changes in regional and global economic conditions, which may impact future earnings.
Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
As part of its ongoing effort to adapt to changing market conditions, Southern Company added several new businesses in 2016, including the acquisitions of Southern Company Gas, PowerSecure, and a 50% interest in the Southern Natural Gas Company, L.L.C. (SNG) pipeline system, as well as continued expansion of Southern Power's renewable energy projects portfolio. Southern Company continues to evaluate and consider a wide array of potential business strategies. These strategies may include business combinations, partnerships, and acquisitions involving other utility or non-utility businesses or properties, disposition of certain assets or businesses, internal restructuring, or some combination thereof. Furthermore, Southern Company may engage in new business ventures that arise from competitive and regulatory changes in the utility industry. Pursuit of any of the above strategies, or any combination thereof, may significantly affect the business operations, risks, and financial condition of Southern Company. In addition, Southern Power and Southern Company Gas regularly consider and evaluate joint development arrangements as well as acquisitions and dispositions of businesses and assets as part of their business strategies. See "Acquisitions and Dispositions" herein and Note 1215 to the financial statements for additional information regarding information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company's recent acquisition activity.Company and Subsidiary Companies 2019 Annual Report

Acquisitions and Dispositions
See Note 15 to the financial statements for additional information.
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax). In 2018, net income attributable to Gulf Power was $160 million.
Alabama Power
On September 6, 2019, Alabama Power entered into a purchase and sale agreement (Autauga Combined Cycle Acquisition) to acquire all of the equity interests in Tenaska Alabama II Partners, L.P. Tenaska Alabama II Partners, L.P. owns and operates an approximately 885-MW combined cycle generation facility in Autauga County, Alabama. The transaction is expected to close by September 1, 2020. As part of the Autauga Combined Cycle Acquisition, Alabama Power will assume an existing power sales agreement under which the full output of the generating facility remains committed to another third party for its remaining term of approximately three years. The estimated revenues from the power sales agreement are expected to offset the associated costs of operation during the remaining term.
The completion of the Autauga Combined Cycle Acquisition is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC and the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
The ultimate outcome of this matter cannot be determined at this time.
Southern Power
Acquisitions
During 2019, Southern Power acquireda controlling interest in the fuel cell generation facility listed below and acquired the Skookumchuck wind facility discussed under "Construction ProgramsSouthern Power" herein. Acquisition-related costs were expensed as incurred and were not material.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Southern Power Ownership
Percentage
CODPPA CounterpartyPPA Remaining Period
DSGP(a)
Fuel Cell28Delaware100% of Class B
N/A(b)
Delmarva Power & Light15 years
(a)During 2019, Southern Power made a total investment of approximately $167 million in DSGP and now holds a controlling interest and consolidates 100% of DSGP's operating results. Southern Power records net income attributable to noncontrolling interests for approximately 10 MWs of the facility.
(b)Southern Power's 18-MW share of the facility was repowered between June and August 2019. In December 2019, a Class C member joined the existing partnership between the Class A member and Southern Power and made an investment to repower the remaining 10 MWs. In connection with the Class C member joining the partnership, the original fuel cells (before repower), which had a carrying value of approximately $55 million, were distributed to the Class A member in a non-cash transaction that was excluded from the statements of cash flows.
Development Projects
Southern Power continues to evaluate and refine the deployment of the remaining wind turbine equipment purchased in 2016 and 2017 to development and construction projects. Wind projects utilizing equipment purchased in 2016 and 2017, and reaching commercial operation by the end of 2020 and 2021, are expected to qualify for 100% and 80% PTCs, respectively. The significant majority of this equipment either has been deployed to completed projects, projects under construction, or projects that are probable of being completed or has been sold to third parties. Sales during 2019 resulted in gains totaling approximately $17 million.
Sales of Renewable Facility Interests
In May 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion. Since Southern Power retained control of the limited partnership through its wholly-owned general partner, the sale was recorded as an
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equity transaction. Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with their partnership ownership interests.
In December 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of eight operating wind facilities, to three financial investors for approximately $1.2 billion. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive 99% of the tax attributes, including future PTCs.
Southern Power consolidates each entity, as the primary beneficiary of the VIE, since it controls the most significant activities, including operating and maintaining the assets.
Sales of Natural Gas and Biomass Plants
In December 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million, including working capital adjustments. In contemplation of this sale transaction, Southern Power recorded an asset impairment charge of approximately $119 million ($89 million after tax) in May 2018. Pre-tax net income for the Florida Plants was $49 million for the period from January 1, 2018 to December 4, 2018.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments. Southern Power recorded a gain of $23 million ($88 million after tax) on the sale. The pre-tax net income for Plant Nacogdoches was $13 million and $27 million for the period from January 1, 2019 to June 13, 2019 and for the year ended 2018, respectively.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments. The sale resulted in a gain of approximately $39 million ($23 million after tax) in 2020. Pre-tax net income for Plant Mankato was $29 million and immaterial for the years ended December 31, 2019 and 2018, respectively. The assets and liabilities of Plant Mankato are classified as held for sale as of December 31, 2019 and 2018.
Southern Company Gas
In June 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC. Southern Company Gas and American Water Enterprises LLC entered into a transition services agreement whereby Southern Company Gas provided certain administrative and operational services through November 4, 2018.
In July 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Southern Company Gas and South Jersey Industries, Inc. entered into transition services agreements whereby Southern Company Gas will provide certain administrative and operational services through no later than July 31, 2020.
In July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. Southern Company Gas and NextEra Energy entered into a transition services agreement whereby Southern Company Gas will provide certain administrative and operational services through no later than July 29, 2020.
The Southern Company Gas Dispositions resulted in a net loss of $51 million in 2018, which includes $342 million of tax expense. The after-tax impacts of these dispositions included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. In addition, a goodwill impairment charge of $42 million was recorded during 2018 in contemplation of the sale of Pivotal Home Solutions.
The Southern Company Gas Dispositions materially decreased Southern Company Gas' subsequent earnings and cash flows. For the year ended December 31, 2018, pre-tax earnings attributable to these dispositions were $297 million, which includes a $291 million gain on dispositions, net and a $42 million goodwill impairment. Due to the seasonal nature of the natural gas business and other factors including, but not limited to, weather, regulation, competition, customer demand, and general economic conditions, these results are not necessarily indicative of the results to be expected for any other period.
On May 29, 2019, Southern Company Gas sold its investment in Triton, a cargo container leasing company. This disposition resulted in a pre-tax loss of $6 million and a net after-tax gain of $7 million as a result of reversing a $13 million federal income tax valuation allowance.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an
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aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
Environmental Matters
ComplianceThe Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and other natural resources. The Southern Company system maintains comprehensive environmental compliance and GHG strategies to assess both current and upcoming requirements and compliance costs relatedassociated with these environmental laws and regulations. The costs required to federal and statecomply with environmental statuteslaws and regulations and to achieve stated goals, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. A major portion of these costs is expected to be recovered through retail and wholesale rates, including existing ratemaking and billing provisions. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of operations for the Subsidiary Registrants. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be fully recovered in rates on a timely basis in rates for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power.
Alabama Power and Mississippi Power recover environmental compliance costs through separate mechanisms, Rate CNP Compliance and the ECO Plan, respectively. Georgia Power's base rates include an Environmental Compliance Cost Recovery (ECCR) tariff that allows for the recovery of environmental compliance spending overcosts. The natural gas distribution utilities of Southern Company Gas generally recover environmental remediation expenditures through rate mechanisms approved by their applicable state regulatory agencies. See Notes 2 and 3 to the next several years may differ materially fromfinancial statements for additional information.
Southern Power's PPAs generally contain provisions that permit charging the amounts estimated.counterparty with some of the new costs incurred as a result of changes in environmental laws and regulations. Since Southern Power's units are newer natural gas and renewable generating facilities, costs associated with environmental compliance for these facilities have been less significant than for similarly situated coal or older natural gas generating facilities. Environmental, natural resource, and land use concerns, including the applicability of air quality limitations, the potential presence of wetlands or threatened and endangered species, the availability of water withdrawal rights, uncertainties regarding impacts such as increased light or noise, and concerns about potential adverse health impacts can, however, increase the cost of siting and operating any type of future electric generating facility. The timing, specific requirements,impact of such laws, regulations, and estimated costs could change as environmental statutesother considerations on Southern Power and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are completed. subsequent recovery through PPA provisions cannot be determined at this time.
Further, higherincreased costs that are recovered through regulated rates could contribute to reduced demand for electricity and natural gas, which could negatively affect results of operations, cash flows, andand/or financial condition. See Note 3 to the financial statements under "Environmental Matters" for additional information.
Environmental Statutes and Regulations
General
The Southern Company system's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Applicable statutes include the Clean Air Act; the Clean Water Act; the Comprehensive Environmental Response, Compensation, and Liability Act; the Resource Conservation and Recovery Act; the Toxic Substances Control Act; the Emergency Planning & Community Right-to-Know Act; the Endangered Species Act; the Migratory Bird Treaty Act; the Bald and Golden Eagle Protection Act; and related federal and state regulations. Compliance with these environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions. Through 2016, the traditional electric operating companies had invested approximately $11.9 billion in environmental capital retrofit projects to comply with
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these requirements, with annual totals of approximately $0.5 billion, $0.9 billion, and $1.1 billion for 2016, 2015, and 2014, respectively. The Southern Company system expects that capital expenditures to comply with environmental statutes and regulations will total approximately $2.9 billion from 2017 through 2021, with annual totals of approximately $0.9 billion, $0.7 billion, $0.3 billion, $0.4 billion, and $0.6 billion for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential capital expenditures that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. The Southern Company system also anticipates costs associated with ash pond closure and ground water monitoring under the Disposal of Coal Combustion Residuals from Electric Utilities final rule (CCR Rule), which are reflected in the Company's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
The Southern Company system's ultimate environmental compliance strategy, including potential electric generating unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations, including the environmental regulations described below; the time periods over which compliance with regulations is required; individual state implementation of regulations, as applicable; the outcome of any legal challenges to the environmental rules; any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology; the fuel mix of the electric utilities; and environmental remediation requirements. Compliance costs may arise from existing unit retirements, installation of additional environmental controls, upgrades to the transmission system, closure and monitoring of CCR facilities, and adding or changing fuel sources for certain existing units. The ultimate outcome of these matters cannot be determined at this time.
Compliance with any new federal or state legislation or regulations relating to air, water, and land resources or other environmental and health concerns could significantly affect the Southern Company system. Although new or revised environmental legislation or regulations could affect many areas of the electric utilities' and natural gas distribution utilities' operations, the full impact of any such changes cannot be determined at this time. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity and natural gas.
Air Quality
Compliance withAlthough the Clean Air Acttiming, requirements, and resultingestimated costs could change as environmental laws and regulations has beenare adopted or modified, as compliance plans are revised or updated, and will continueas legal challenges to be a significant focus for the Southern Company system.
In 2012, the EPA finalized the Mercury and Air Toxics Standards (MATS) rule, which imposes stringent emissions limits for acid gases, mercury, and particulate matter on coal- and oil-fired electric utility steam generating units. The implementation strategy for the MATS rule included emission controls, retirements, and fuel conversions at affected units within the Southern Company system. All units within the Southern Company system thatrules are subject to the MATS ruleinitiated or completed, the measures necessary to achieve compliance with this rule or were retired prior to or during 2016.
The EPA regulates ground level ozone concentrations through implementation of an eight-hour ozone National Ambient Air Quality Standard (NAAQS). In 2008, the EPA adopted a revised eight-hour ozone NAAQS and published its final area designations in 2012. The only area within the traditional electric operating companies' service territory designated as an ozone nonattainment area for the 2008 standard is a 15-county area within metropolitan Atlanta, which on December 23, 2016, the EPA proposed to redesignate to attainment. In October 2015, the EPA published a more stringent eight-hour ozone NAAQS. This new standard could potentially require additional emission controls, improvements in control efficiency, and operational fuel changes and could affect the siting of new generating facilities. States were required to recommend area designations by October 2016, and the only area within the Southern Company system's electric service territory that was proposed for designation is an eight-county area within the Atlanta metropolitan area in Georgia. The EPA is expected to finalize area designations by October 2017.
The EPA regulates fine particulate matter concentrations through an annual and 24-hour average NAAQS, based on standards promulgated in 1997, 2006, and 2012. All areas in which the traditional electric operating companies' generating units are located have been determined by the EPA to be in attainment with those standards.
In 2010, the EPA revised the NAAQS for sulfur dioxide (SO2), establishing a new one-hour standard. No areas within the Southern Company system's service territory have been designated as nonattainment under this standard. However, in 2015, the EPA finalized a data requirements rule to support final EPA designation decisions for all remaining areas under the SO2 standard, which could result in nonattainment designations for areas within the Southern Company system's electric service territory. Nonattainment designations could require additional reductions in SO2 emissions and increased compliance and operational costs.estimated capital
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In 2014,expenditures through 2024 based on the EPA proposed to delete from the Alabama State Implementation Plan (SIP) the Alabama opacity rule that the EPA approved in 2008, which provides operational flexibility to affected units. In 2013, the U.S. Court of Appealscurrent environmental compliance strategy for the Eleventh Circuit ruled in favorSouthern Company system and the traditional electric operating companies are as follows:
 20202021202220232024Total
 (in millions)
Southern Company$223
$250
$244
$214
$131
$1,062
Alabama Power80
77
82
97
103
439
Georgia Power115
156
152
105
23
551
Mississippi Power28
17
10
12
5
72
These estimates do not include any costs associated with potential regulation of Alabama Power and vacated an earlier attempt by the EPA to rescind its 2008 approval. The EPA's latest proposal characterizes the proposed deletion as an error correction within the meaning of the Clean Air Act. Alabama Power believes this interpretation of the Clean Air Act to be incorrect. If finalized, this proposed action could affect unit availability and result in increased operations and maintenance costsGHG emissions. See "Global Climate Issues" herein for affected units, including units owned by Alabama Power and units owned by SEGCO, which is jointly owned by Alabama Power and Georgia Power.
On July 6, 2011, the EPA finalized the Cross State Air Pollution Rule (CSAPR). CSAPR is an emissions trading program that limits SO2 and nitrogen oxide (NOx) emissions from power plants in two phases – Phase 1 in 2015 and Phase 2 in 2017.additional information. The Southern Company system has fossil generationalso anticipates substantial expenditures associated with ash pond closure and ground water monitoring under the CCR Rule and related state rules, which are reflected in several states that were subjectthe applicable Registrants' ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein and Note 6 to the requirements of the 2011 CSAPR, including Alabama, Florida, Georgia, Mississippi, North Carolina,financial statements for additional information.
Environmental Laws and Texas. On October 26, 2016, the EPA published a final rule that updates the CSAPR ozone season NOx program, beginning in 2017, and establishes more stringent ozone-season emissions budgets in Alabama, Mississippi, and Texas and removes Florida and North Carolina from the ozone season program. Georgia's ozone season NOx budget remains unchanged. North Carolina remains in the CSAPR annualRegulations
Air Quality
The Southern Company system reduced SO2 and NOxX programs, along with Alabama, Georgia, air emissions by 98% and Texas.88%, respectively, from 1990 to 2018. The Southern Company system reduced mercury air emissions by over 96% from 2005 to 2018.
The EPA finalized regional haze regulations in 2005 with aand 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, (primarilyincluding national parks and wilderness areas)areas. States are required to submit state implementation plans for the second ten-year planning period (2018 through 2028) by 2064. The rule involves the application of best available retrofit technology to certain sources, including fossil fuel-fired generating facilities, built between 1962 and 1977 and any additional emissions reductions necessary for each designated area to achieve reasonable progress toward the natural visibility conditions goal by 2018 and for each 10-year period thereafter. On December 14, 2016, the EPA finalized revisions to the regional haze regulations. These regulations establish a deadline of July 31, 2021 for states to submit revised SIPs to the EPA demonstrating reasonable progress toward the statutory goal of achieving natural background conditions by 2064. State implementation of the reasonable progress requirements defined in this final rule2021. These plans could require further reductions in particulate matter, SO2, and/or NOxX emissions.
In June 2015, the EPA published a final rule requiring certain states (including Alabama, Florida, Georgia, Mississippi, North Carolina, and Texas) to revise or remove the provisions of their SIPs relating to the regulation of excess emissions at industrial facilities, including fossil fuel-fired generating facilities, during periods of startup, shut-down, or malfunction (SSM), and many states have submitted proposed SIP revisions in response to the rule.
The Southern Company system has developed and continually updates a comprehensive environmental compliance strategy to assess compliance obligations associated with the current and proposed environmental requirements discussed above. These regulationswhich could result in significant additional capital expenditures andincreased compliance costs that could affect future unit retirement and replacement decisions and results of operations, cash flows, and financial condition if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of the eight-hour ozone and SO2 NAAQS, Alabama opacity rule, CSAPR, regional haze regulations, and SSM rule will depend on various factors, such as implementation, adoption, or other action at the state level, and the outcome of pending and/or future legal challenges, and cannot be determined at this time.affected electric generating units.
Water Quality
The EPA's final rule establishing standards for reducingIn 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life caused by new and existing cooling water intake structures at existing power plantsplants. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms. The Southern Company system is conducting these studies and manufacturing facilities became effective in 2014.currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. The effectimpact of this final rule will depend on the resultsoutcome of these plant-specific studies, any additional studies that are currently underway and implementation of the rule by regulators based on site-specific factors.protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permits issued after July 14, 2018 must include conditions to implementpermit based on site-specific factors, and ensure compliance with the standards and protective measures required by the rule.outcome of any legal challenges.
In November 2015, the EPA published a finalfinalized the steam electric effluent limitations guidelines (ELG) rule which(2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent technology-based requirements for certain wastestreams from steam electric power plants.limits on flue gas desulfurization (scrubber) wastewater discharges. The revised2015 technology-based limits and compliance dates will be incorporated into future renewals of NPDES permits at affected unitsthe CCR Rule require extensive changes to existing ash and may requirewastewater management systems or the installation and operation of multiple technologies sufficientnew ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to ensurerequire capital expenditures and increased operational costs for the traditional electric operating companies' coal-fired electric generation. State environmental agencies will incorporate specific compliance with applicable new numericapplicability dates in the NPDES permitting process for each ELG waste stream. On November 22, 2019, the EPA published a proposed rule that changes certain requirements in the 2015 ELG Rule, including adjusting compliance limits and providing certain exemptions for boilers that are expected to be retired by December 31, 2028 and for low utilization boilers (876,000 MWh/year or less). The proposal also extends the latest applicability date for flue gas desulfurization wastewater compliance limits. Compliance deadlines between November 1, 2018 andto December 31, 2025 but retains the latest applicability date of December 31, 2023 for bottom ash transport water. The impact of any changes to the 2015 ELG Rule will be established in permits baseddepend on information provided for each applicable wastestream.the content of a new final rule, which the EPA plans to finalize by August 2020, and the outcome of any legal challenges.
Coal Combustion Residuals
In 2015, the EPA and the U.S. Army Corps of Engineers jointly published a final rule revising the regulatory definition of waters of the U.S. for all Clean Water Act (CWA) programs. The final rule significantly expands the scope of federal jurisdiction under the CWA and could have significant impacts on economic development projects which could affect customer demand growth. In addition, this rule could significantly increase permitting and regulatory requirements and costs associated with the siting of new facilities and the installation, expansion, and maintenance of transmission and distribution lines and natural gas pipelines. The rule became effective in August 2015 but, in October 2015, the U.S. Court of Appealsfinalized non-hazardous solid waste regulations for the Sixth Circuit issued an order stayingdisposal of CCR, including coal ash and gypsum, in landfills and surface impoundments (ash ponds) at active electric generating power plants. The CCR Rule requires landfills and
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implementationash ponds to be evaluated against a set of performance criteria and potentially closed if certain criteria are not met. Closure of existing landfills and ash ponds requires installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. In addition to the CCR Rule, the States of Alabama and Georgia finalized state regulations regarding the handling of CCR within their respective states. The State of Georgia received approval from the EPA on its partial permit program implementing the state CCR permit program in lieu of the final rule.federal self-implementing rule in accordance with the Water Infrastructure Improvements for the Nation Act. The caseState of Alabama also submitted its state CCR program for the EPA's review and approval. The State of Mississippi has not yet developed a state CCR permit program.
The EPA is held in abeyance pending review by the U.S. Supreme Courtprocess of challengesamending portions of the CCR Rule. Most recently, on December 2, 2019, the EPA published a proposed rule that would require facilities to cease placement of both CCR and non-CCR waste in unlined surface impoundments as soon as technically feasible, no later than August 31, 2020. This proposed rule also includes extensions beyond August 31, 2020, provided that certain conditions are met. Impacts of the proposed rule to the U.S. CourtSouthern Company system are expected to be limited, as the traditional electric operating companies and SEGCO stopped sending coal ash from most of Appeals for the Sixth Circuit's jurisdictiongenerating units to unlined ponds in April 2019 and expect to stop sending coal ash from the remaining generating units within the timeframes and associated extensions allowed in the case.proposed rule.
These water quality regulationsBased on cost estimates for closure and monitoring of landfills and ash ponds pursuant to the CCR Rule, the Southern Company system recorded/revised AROs for each CCR unit in 2015 and has continued to update these cost estimates and ARO liabilities in subsequent years. The traditional electric operating companies expect to continue updating these estimates periodically as additional information related to ash pond closure methodologies, schedules, and/or costs becomes available. Alabama Power anticipates increasing the ARO for one of its ash ponds within the next nine months upon completion of a feasibility study and the related cost estimate, and the increase could resultbe material. Additionally, the closure designs and plans in significant additional capital expendituresthe States of Alabama and complianceGeorgia are subject to approval by environmental regulatory agencies. Absent continued recovery of ARO costs that could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. Also,through regulated rates, results of operations, cash flows, and financial condition for Southern Company and the traditional electric operating companies could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. materially impacted. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerIntegrated Resource Plan" herein and Note 6 to the financial statements for additional information.
The ultimate impactoutcome of these final rules will depend on various factors, such as pending and/or future legal challenges, compliance dates, and implementation of the rules, andmatters cannot be determined at this time.
Coal Combustion Residuals
The traditional electric operating companies currently manage CCR at onsite storage units consisting of landfills and surface impoundments (CCR Units) at 23 current or former electric generating plants. In addition to on-site storage, the traditional electric operating companies also sell a portion of their CCR to third parties for beneficial reuse. Individual states regulate CCR and the states in the Southern Company system's electric service territory each have their own regulatory requirements. Each traditional electric operating company has an inspection program in place to assist in maintaining the integrity of its coal ash surface impoundments.
The CCR Rule became effective in October 2015. The CCR Rule regulates the disposal of CCR, including coal ash and gypsum, as non-hazardous solid waste in CCR Units at active generating power plants. The CCR Rule does not automatically require closure of CCR Units but includes minimum criteria for active and inactive surface impoundments containing CCR and liquids, lateral expansions of existing units, and active landfills. Failure to meet the minimum criteria can result in the required closure of a CCR Unit. On December 16, 2016, President Obama signed the Water Infrastructure Improvements for the Nation Act (WIIN Act). The WIIN Act allows states to establish permit programs for implementing the CCR Rule, if the EPA approves the program, and allows for federal permits and EPA enforcement where a state permitting program does not exist. On October 26, 2016, the Georgia Department of Natural Resources approved amendments to its state solid waste regulations to incorporate the requirements of the CCR Rule and establish additional requirements for all of Georgia Power's onsite storage units consisting of landfills and surface impoundments.
Based on current cost estimates for closure and monitoring of ash ponds pursuant to the CCR Rule, Southern Company has recorded incremental AROs related to the CCR Rule. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, the traditional electric operating companies expect to continue to periodically update these estimates. The traditional electric operating companies have posted closure and post-closure care plans to their public websites as required by the CCR Rule; however, the ultimate impact of the CCR Rule will depend on the results of initial and ongoing minimum criteria assessments and the implementation of state or federal permit programs. Southern Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information regarding Southern Company's AROs as of December 31, 2016.
Environmental Remediation
The Southern Company system must comply with other environmental laws and regulations that covergoverning the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and Southern Company Gas conduct studies to determine the extent of any required cleanup and have recognized the Company has recognized in its financial statements theestimated costs to clean up known impacted sites.sites in their financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. The traditional electric operating companies and the natural gas distribution utilities in Illinois New Jersey,and Georgia and Florida(which represent substantially all of Southern Company Gas' accrued remediation costs) have eachall received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. The traditional electric operating companies and Southern Company Gas may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental MattersEnvironmental Remediation" for additional information.
Global Climate Issues
In October 2015,On July 8, 2019, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing CO2 emissions from new, modified,Affordable Clean Energy rule (ACE Rule) to repeal and reconstructed units.replace the CPP. The other final action, known as the Clean Power Plan, establishes guidelines forACE Rule requires states to develop plansunit-specific CO2 emission rate standards for existing coal-fired units based on heat-rate efficiency improvements. The ACE Rule is being challenged in the D.C. Circuit Court of Appeals and Georgia Power is an intervenor in the litigation in support of the rule, as are other industry parties. The ultimate impact of the ACE Rule to the Southern Company system will depend on state implementation plan requirements and the outcome of associated legal challenges and cannot be determined at this time.
Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy; however, associated impacts are currently unknown. The Southern Company system has transitioned from an electric generating mix of 70% coal and 15% natural gas in 2007 to a mix of 22% coal and 52% natural gas in 2019, along with over 8,300 MWs of renewable resources. This transition has been supported in part by the Southern Company system retiring over 5,600 MWs of coal- and oil-fired generating capacity since 2010 and converting over 3,400 MWs of generating capacity from coal to natural gas since 2015. In addition, Southern Company Gas has replaced approximately 5,600 miles of bare steel and
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meet EPA-mandated CO2 emission rates or emission reduction goals for existing units. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022 and 2029 and final ratescast-iron pipe, resulting in 2030 and thereafter. At the same time, the EPA published a proposed federal plan and model rule that, when finalized, states can adopt or that would be put in place if a state either does not submit a state plan or its plan is not approved by the EPA. On February 9, 2016, the U.S. Supreme Court granted a stayremoval of the Clean Power Plan, pending disposition of petitions for review with the courts. The stay will remain in effect through the resolution of the litigation, including any review by the U.S. Supreme Court.
These guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. Southern Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. However, the ultimate financial and operational impact of the final rules on the Southern Company system cannot be determined at this time and will depend upon numerous factors, including the outcome of pending legal challenges, including legal challenges filed by the traditional electric operating companies, and any individual state implementation of the EPA's final guidelines in the event the rule is upheld and implemented.
In December 2015, parties to the United Nations Framework Convention on Climate Change – including the United States – adopted the Paris Agreement, which establishes a non-binding universal framework for addressing greenhouse gas emissions based on nationally determined contributions. It also sets in place a process for tracking progress toward the goals every five years. The ultimate impact of this agreement depends on its implementation by participating countries and cannot be determined at this time.
The EPA's greenhouse gas reporting rule requires annual reporting of greenhouse gas emissions expressed in terms ofapproximately 2.5 million metric tons of CO2 equivalentGHG from its natural gas distribution system since 1998.
The following table provides the Registrants' 2018 and preliminary 2019 GHG emissions for a company's operational control of facilities. Basedbased on ownership or financial control of facilities,facilities:
 2018Preliminary 2019
 
(in million metric tons of CO2 equivalent)
Southern Company(a)(b)
102
88
Alabama Power36
32
Georgia Power30
27
Mississippi Power8
9
Southern Power(b)
14
13
Southern Company Gas(b)
1
1
(a)Includes non-registrant subsidiaries.
(b)The 2018 and preliminary 2019 amounts include GHG emissions attributable to disposed assets through the date of the applicable disposition. See Note 15 to the financial statements for additional information regarding disposition activities.
Based on the preliminary 2019 amount above, the Southern Company system's 2015 greenhouse gassystem has achieved an estimated GHG emission reduction of 44% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions were approximately 102 million metric tonsfrom 2007 levels by 2030 and a long-term goal of CO2 equivalent.low- to no-carbon operations by 2050. The preliminary estimate of the Southern Company system's 2016 greenhouseability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas emissions onprices, and the same basis, including the additiondevelopment, deployment, and advancement of relevant energy technologies. The Southern Company Gas, is approximately 99 million metric tons of CO2 equivalent. The level of greenhouse gas emissions from yearsystem expects to year will depend oncontinue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the level of generation, the mix of fuel sources, and other factors.
FERC Matters
Market-Based Rate Authority
The traditional electric operating companies and Southern Power have authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The traditional electric operating companies and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
At December 31, 2016, Southern Company Gas' gas midstream operations was involved in three gas pipeline construction projects with expected capital expenditures of approximately $780 million. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sourcesuse of natural gas suppliesfor generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to customers, resolve current and long-term
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lower GHG emissions. The Southern Company and Subsidiary Companies 2016 Annual Reportsystem is also evaluating methods of removing carbon from the atmosphere.


supply planning for new capacity, enhance system reliability, and generate economic development in the areas served. One of these projects received FERC approval in August 2016. The remaining projects are pending FERC approval, which is expected to occur in 2017. The ultimate outcome of this matter cannot be determined at this time.
Regulatory Matters
Alabama Power
Alabama Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Alabama PSC. Alabama Power currently recovers its costs from the regulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to address current events impacting Alabama Power. See Note 32 to the financial statements under "Regulatory MattersAlabama Power" for additional information regarding Alabama Power's rate mechanisms and accounting orders.
Petition for Certificate of Convenience and Necessity
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, both as more fully described below, as well as the Autauga Combined Cycle Acquisition. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. This filing was predicated on the results of Alabama Power's 2019 IRP provided to the Alabama PSC, which identified an approximately 2,400-MW resource need for Alabama Power, driven by the need for additional winter reserve capacity. See Note 15 to the financial statements under "Alabama Power" for additional information regarding the Autauga Combined Cycle Acquisition.
The procurement of these resources is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC. The completion of the Autauga Combined Cycle Acquisition is also subject to approval by the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
On May 8, 2019, Alabama Power entered into an Agreement for Engineering, Procurement, and Construction with Mitsubishi Hitachi Power Systems Americas, Inc. and Black & Veatch Construction, Inc. to construct an approximately 720-MW combined cycle facility at Plant Barry (Plant Barry Unit 8), which is expected to be placed in service by the end of 2023.
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The capital investment associated with the construction of Plant Barry Unit 8 and the Autauga Combined Cycle Acquisition is currently estimated to total approximately $1.1 billion.
Alabama Power entered into additional long-term PPAs totaling approximately 640 MWs of generating capacity consisting of approximately 240 MWs of combined cycle generation expected to begin later in 2020 and approximately 400 MWs of solar generation coupled with battery energy storage systems (solar/battery systems) expected to begin in 2022 through 2024. The terms of the agreements for the solar/battery systems permit Alabama Power to use the energy and retire the associated renewable energy credits (REC) in service of customers or to sell RECs, separately or bundled with energy.
Upon certification, Alabama Power expects to recover costs associated with Plant Barry Unit 8 pursuant to its Rate CNP New Plant. Additionally, Alabama Power expects to recover costs associated with the Autauga Combined Cycle Acquisition through the inclusion in Rate RSE of revenues from the existing power sales agreement and, on expiration of that agreement, pursuant to Rate CNP New Plant. The recovery of costs associated with laws, regulations, and other such mandates directed at the utility industry are expected to be recovered through Rate CNP Compliance. Alabama Power expects to recover the capacity-related costs associated with the PPAs through its Rate CNP PPA. In addition, fuel and energy-related costs are expected to be recovered through Rate ECR. Any remaining costs associated with the Autauga Combined Cycle Acquisition and Plant Barry Unit 8 will be incorporated through the annual filing of Rate RSE.
The ultimate outcome of these matters cannot be determined at this time.
Construction Work in Progress Accounting Order
On October 1, 2019, the Alabama PSC acknowledged that Alabama Power would begin certain limited preparatory activities associated with Plant Barry Unit 8 construction to meet the target in-service date by authorizing Alabama Power to record the related costs as CWIP prior to the issuance of an order on the CCN petition. Should a CCN not be granted and Alabama Power does not proceed with the related construction of Plant Barry Unit 8, Alabama Power may transfer those costs and any costs that directly result from the non-issuance of the CCN to a regulatory asset which would be amortized over a five-year period. If the balance of incurred costs reaches 5% of the estimated in-service cost of the total project prior to issuance of an order on the CCN petition, Alabama Power will confer with the Alabama PSC regarding the appropriateness of additional authorization. The Sierra Club subsequently filed a petition for reconsideration of the accounting order. The Alabama PSC voted to deny the petition for reconsideration on January 7, 2020.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted cost ofcommon equity (WCE)return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCEWCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCEWCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
In May 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2019, Alabama Power's equity ratio was approximately 50%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, during a year without a Rate RSE upward adjustment, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%. During a year
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with a Rate RSE upward adjustment, if Alabama Power's actual WCER exceeds 6.15%, customers receive 50% of the amount between 6.15% and 6.90% and all amounts in excess of an actual WCER of 6.90%.
In conjunction with these modifications to Rate RSE, in May 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and to return $50 million to customers through bill credits in 2019.
On December 1, 2016,November 27, 2019, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2017. The2020. Projected earnings were within the specified range; therefore, retail rates under Rate RSE adjustment was an increaseremain unchanged for 2020.
During 2019, Alabama Power provided to the Alabama PSC and the Alabama Office of 4.48%, or $245 million annually, effective January 1, 2017the Attorney General information related to the operation and includes the performance based adder of 0.07%. Under the termsutilization of Rate RSE, in accordance with the maximum increase for 2018rules governing the operation of Rate RSE. The ultimate outcome of this matter cannot exceed 3.52%.be determined at this time.
As ofAt December 31, 2016, the 2016 retail return2019, Alabama Power's WCER exceeded the allowed WCE range; therefore,6.15%, resulting in Alabama Power establishedestablishing a $73current regulatory liability of $53 million for Rate RSE refund liability. In accordance with an order issued on February 14, 2017 by the Alabama PSC, Alabama Power was directedrefunds, which will be refunded to apply the full amount of the refund to reduce the under recovered balance of customers through bill credits in April 2020.
Rate CNP PPA.New Plant
Rate CNP New Plant allows for recovery of Alabama Power's retail costs associated with newly developed or acquired certificated generating facilities placed into retail service. No adjustments to Rate CNP New Plant occurred during the period 2017 through 2019. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information.
Rate CNP PPA
Rate CNP PPA allows for the recovery of Alabama Power's retail rates, approved by the Alabama PSC, provide for adjustments to recognize the placing of new generating facilities into retail service under Rate CNP. Alabama Power may also recover retail costs associated with certificated PPAs under Rate CNP PPA. On March 8, 2016, the Alabama PSC issued a consent order that Alabama Power leave in effect the current Rate CNP PPA factor for billings for the period April 1, 2016 through March 31, 2017.PPAs. No adjustmentadjustments to Rate CNP PPA occurred during the period 2017 through 2019 and no adjustment is expected in 2017.for 2020.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, Alabama Power was authorized to eliminate the under recovered balance in Rate CNP PPA at December 31, 2016, which totaled approximately $142 million. As discussed herein under "Rate RSE," Alabama Power will utilize the full amount of its $73 million Rate RSE refund liability to reduce the amount of the Rate CNP PPA under recovery and will reclassify the remaining $69 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur within the next three to five years. Alabama Power's current depreciation study became effective January 1, 2017.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factorfactors that isare calculated annually.and submitted to the Alabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance relatedCompliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On December 6, 2016,November 27, 2019, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the billing month of January 2020.
Rate ECR
Rate ECR recovers Alabama Power's retail energy costs based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed gives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, issued a consent order that Alabama Power leavecontinually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect for 2017 the factors associated withon Southern Company's or Alabama Power's compliance costs fornet income but will impact operating cash flows. The Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
On December 3, 2019, the year 2016. As statedAlabama PSC approved a decrease to Rate ECR from 2.353 to 2.160 cents per KWH, equal to 1.82%, or approximately $102 million annually, effective January 1, 2020. The rate will adjust to 5.910 cents per KWH in January 2021 absent a further order from the consent order, any under-collected amountAlabama PSC.
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Southern Company and Subsidiary Companies 20162019 Annual Report



Tax Reform Accounting Order
In May 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for prior years will be deemed recovered before the recoveryyear ended December 31, 2018 as a regulatory liability and to use up to $30 million of any current year amounts. Anysuch deferrals to offset under recovered amounts associated with 2017 will be reflected inunder Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 filing.
In accordance with an accounting order issued on February 17, 2017 bytotaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power is authorized to classify any under recoveredapply the remaining deferred balance of approximately $39 million to increase the balance in the NDR. See "Rate CNP Compliance upNDR" herein and Note 10 to approximately $36 millionthe financial statements under "Current and Deferred Income Taxes" for additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Joint Ownership Agreements" for additional information regarding the joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a separate regulatory asset. The amortizationfour-year acceleration of the newretirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to monitor the status of Mississippi Power's proposed RMP and associated regulatory asset through process as well as the proposed transmission and system reliability improvements. Alabama Power will review all the facts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of Plant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur within the next three to five years. Alabama Power's current depreciation study became effective January 1, 2017.NDR
Environmental Accounting Order
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR enhance Alabama Power's ability to mitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear.
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
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Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. These costs areThe regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance. See "Environmental MattersEnvironmental Statutes and Regulations" herein for additional information regarding environmental regulations.
InOn April 2016, as part of its environmental compliance strategy,15, 2019, Alabama Power ceased using coal atretired Plant Greene CountyGorgas Units 18, 9, and 2 (300 MWs representing Alabama Power's ownership interest)10 and began operating Units 1 and 2 solely on natural gas in June 2016 and July 2016, respectively. As a result, Alabama Power transferredreclassified approximately $654 million of the unrecovered plant asset balances to a regulatory asset at their respective retirement dates. The regulatory asset will be amortized andassets, which are being recovered through Rate CNP Compliance over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 2 to the financial statements under "Alabama Power" and Note 6 to the financial statements for retirement; therefore, these decisions associated with coal operations had no significant impact on Southern Company's financial statements.additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through the 2013 ARP,an alternate rate plan, which includes traditional base tariff rates,tariffs, Demand-Side Management (DSM) tariffs, Environmental Compliance Cost Recovery (ECCR) tariffs,the ECCR tariff, and Municipal Franchise Fee (MFF) tariffs. In addition, financing costs related to theon certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariffs.tariff. See Note 32 to the financial statements under "Regulatory MattersGeorgia PowerGeorgia PowerRate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%
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(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC on April 14,in 2016, the 2013 ARP will continuecontinued in effect until December 31, 2019, and Georgia Power will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, Georgia Power and Atlanta Gas Light Company each will retain their respectiveretained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings applicable to each will be shared on a 60/40 basis with their respective customers; thereafter, all merger savings will be retained by customers. See Note 3
There were no changes to the financial statements under "Regulatory MattersGeorgia PowerRate Plans" for additional information regarding the 2013 ARP and Note 12 to the financial statements under "Southern CompanyMerger with Southern Company Gas" for additional information regarding the Merger.
In accordance with the 2013 ARP, the Georgia PSC approved increases to tariffs effective January 1, 2015 and 2016 as follows: (1)Power's traditional base tariff rates by approximately $107 million and $49 million, respectively; (2)tariffs, ECCR tariff, by approximately $23 million and $75 million, respectively; (3) DSM tariffs, by approximately $3 millionor MFF tariffs in each year; and (4) MFF tariff by approximately $3 million and $13 million, respectively, for a total increase in base revenues of approximately $136 million and $140 million, respectively.2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE iswas set at 10.95% and earnings arewere evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% willwere to be directly refunded to customers, with the remaining one-third retained by Georgia Power. There will be no recoveryOn February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of any earnings shortfall below 10.00% on an actual basis.the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2014,2019 and 2018, Georgia Power's retail ROE exceeded 12.00%, and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia Power refunded to retail customershas reduced regulatory assets by a total of approximately $11$110 million in 2016, as approved by the Georgia PSC on February 18, 2016. In 2015, Georgia Power's retail ROE was within the allowed retail ROE range. In 2016, Georgia Power's retail ROE exceeded 12.00%, and Georgia Power expects to refund a total of approximately $110 million to retail customers, approximately $40 million, subject to review and approval by the Georgia PSC. The ultimate outcomeSee "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of this matter cannot be determined at this time.the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
TableTo address some of ContentsIndexthe negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to Financial Statementsthe lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


See "2019 ARP" herein for additional information.
Integrated Resource Plan
See "Environmental Matters" herein for additional information regarding proposed and final EPA rules and regulations, including the MATS rule for coal- and oil-fired electric utility steam generating units, revisions to effluent limitations guidelinesELG for steam electric power plants and additional regulations of CCR and CO2; and Georgia Power's analysis of the potential costs and benefits of installing the required controls on its fossil generating units in light of these regulations..
On July 28, 2016,16, 2019, the Georgia PSC voted to approve Georgia Power's modified triennial IRP (Georgia Power 2019 IRP). In the Georgia Power 2019 IRP, the Georgia PSC approved the 2016 IRP including the decertification and retirement of Plant MitchellHammond Units 3, 4A, and 4B (2171 through 4 (840 MWs) and Plant KraftMcIntosh Unit 1 (17(142.5 MWs), as well as effective July 29, 2019. In accordance with the decertification2019 ARP, the remaining net book values at December 31, 2019 of the Intercession City unit (143 MWs total capacity). On August 2, 2016,$488 million for the Plant MitchellHammond units are being recovered over a period equal to the respective unit's remaining useful life, which varies between 2024 and Plant Kraft units were retired. On August 31, 2016, Georgia Power sold its 33% ownership interest in the Intercession City unit to Duke Energy Florida, LLC.
Additionally, the Georgia PSC approved Georgia Power's environmental compliance strategy2035, and related expenditures proposed in the 2016 IRP, including measures taken to comply with existing government-imposed environmental mandates, subject to limits on expenditures$30 million for Plant McIntosh Unit 1 and Plant Hammond Units 1 through 4.
The Georgia PSC approved the reclassificationis being recovered over a three-year period ending December 31, 2022. In addition, approximately $20 million of the remaining net book value of Plant Mitchell Unit 3 and costs associated withrelated unusable materials and supplies remaining at the unitinventory balances and approximately $295 million of net capitalized asset retirement datecosts were reclassified to a regulatory asset. Recovery ofIn accordance with the unit's net book value will continue through December 31, 2019, as providedmodifications to the earnings sharing mechanism approved in the 2013 ARP. The timing of2019 ARP, Georgia Power fully amortized the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costsregulatory assets associated with these unusable materials and supplies remaining at the unit retirement date was deferred for consideration in Georgia Power's 2019 base rate case.
The Georgia PSC also approved the Renewable Energy Development Initiative to procure an additional 1,200 MWs of renewable resources primarily utilizing market-based prices established through a competitive bidding process with expected in-service dates between 2018 and 2021. Additionally, 200 MWs of self-build capacity for use by Georgia Power was approved, as well as consideration for no more than 200 MWs of capacity as part of a renewable commercial and industrial program.
The Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear as an option at a future generation site in Stewart County, Georgia. The timing of cost recovery will be determined by the Georgia PSC in a future base rate case. The ultimate outcome of this matter cannot be determined at this time.
Storm Damage Recovery
As of December 31, 2016, the balance in Georgia Power's regulatory asset related to storm damage was $206 million. During October 2016, Hurricane Matthew caused significant damage to Georgia Power's transmission and distribution facilities. As of December 31, 2016, Georgia Power had recorded incremental restoration cost related to this hurricane of $121 million, of which approximately $116 million was charged to the storm damage reserve and the remainder was capitalized. Georgia Power is accruing $30 million annually through December 31, 2019, as provided in the 2013 ARP, to the storm damage reserve to cover the operations and maintenance costs of damages from major storms to its transmission and distribution facilities, which is recoverable through base rates. The rate of recovery of storm damage costs after December 31, 2019 is expected to be adjusted in Georgia Power's 2019 base rate case. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's financial statements. See Note 3 to the financial statements under "Regulatory MattersGeorgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Gulf Power
Through 2015, long-term non-affiliate capacity sales from Gulf Power's ownership of Plant Scherer Unit 3 (205 MWs) provided the majority of Gulf Power's wholesale earnings. Contract expirations at the end of 2015 and the end of May 2016 related to Plant Scherer Unit 3 wholesale sales did not have a material impact on Southern Company's earnings in 2016. Remaining contract sales from Plant Scherer Unit 3 cover approximately 24% of Gulf Power's ownership of the unit through 2019.
On October 12, 2016, Gulf Power filed a petition (2016 Rate Case) with the Florida PSC requesting an annual increase in retail rates and charges of $106.8 million based on the projected test year of January 1, 2017 through December 31, 2017 and a retail ROE of 11% compared to the current retail ROE of 10.25%. The requested increase includes recovery of the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers following the contract expirations discussed above. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, Gulf Power may consider an asset sale. The current book value of Gulf Power's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. The Florida PSC is expected to make a decision on the 2016 Rate Case in the second quarter 2017. Gulf Power has requested that the increase in base rates, if approved by the Florida PSC, become effective in July 2017.
On November 2, 2016, the Florida PSC approved Gulf Power's 2017 annual cost recovery clause factors. The fuel and environmental factors include certain costs associated with the ongoing ownership and operation of Plant Scherer Unit 3. Theinventory
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final dispositionbalances as well as a regulatory asset of theseapproximately $50 million related to costs and the related impact on rates, is subject to the Florida PSC's ultimate ruling on whether costs associated with Plant Scherer Unit 3 are recoverable from retail customers, which is expected to be decidedfor a future generation site in Stewart County, Georgia. See "Rate Plans – 2019 ARP" herein for additional information.
Also in the 2016 Rate Case as discussed previously.
See Note 3 to the financial statements under "Regulatory MattersGulfGeorgia PowerRetail Base Rate Cases" for additional information. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Natural Gas Cost Recovery
Southern Company Gas has established natural gas cost recovery rates that are approved by the applicable state regulatory agencies in the states in which it serves. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's revenues or net income, but will affect cash flow.
Regulatory Infrastructure Programs
Six of Southern Company Gas' seven natural gas distribution utilities are involved in ongoing capital projects associated with infrastructure improvement programs that have been previously approved by their applicable state regulatory agencies and provide an appropriate return on invested capital. These infrastructure improvement programs are designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. Initial program lengths range from four to 10 years, with the longest set to expire in 2025. The total expected investment under these programs for 2017 is $590 million.
On February 21, 2017, the Georgia PSC approved a rate adjustment mechanism for Atlanta Gas Light that included the 2017 capital investment associated with a four-year extension of one of its existing infrastructure programs, with a total additional investment of $177 million through 2020. In addition, Elizabethtown Gas currently has a proposed infrastructure improvement program pending approval by the New Jersey Board of Public Utilities requesting to invest more than $1.1 billion through 2027.
The ultimate outcome of these matters cannot be determined at this time.
Renewables
In accordance with the September 2015 Alabama PSC order approving up to 500 MWs of renewable projects, Alabama Power has entered into agreements to purchase power from and to build 89 MWs of renewable generation sources. The terms of the agreements permit Alabama Power to use the energy and retire the associated renewable energy credits (REC) in service of its customers or to sell RECs, separately or bundled with energy.
In 2014, 2019 IRP, the Georgia PSC approved Georgia Power's application forproposed environmental compliance strategy associated with ash pond and certain landfill closures and post-closure care in compliance with the certification of two PPAs executed in 2013 forCCR Rule and the purchase of energy from two wind farms in Oklahoma with capacity totaling 250 MWs that began in 2016 and have 20-year terms.
As part ofrelated state rule. In the Georgia Power Advanced Solar Initiative (ASI), in 2014,2019 ARP, the Georgia PSC approved PPAs executed since April 2015 for the purchase of energy from 555 MWs of solar capacity that began in 2015 and 2016 and have terms ranging from 20 to 30 years. As a result of certain acquisitions by Southern Power, 249 MWs of this contracted capacity is being provided from solar facilities owned by Southern Power through five PPAs that began in 2016. Ownership of any associated REC is specified in each respective PPA. The party that owns the RECs retains the right to use them.
In 2014, the Georgia PSC approved Georgia Power's request to build, own, and operate 30-MW solar generation facilities at three U.S. Army bases and one U.S. Navy base by the end of 2016. Onerecovery of the four solar generation facilities began commercial operationestimated under recovered balance of these compliance costs at December 31, 2019 over a three-year period ending December 31, 2022 and recovery of estimated compliance costs for 2020, 2021, and 2022 over three-year periods ending December 31, 2022, 2023, and 2024, respectively, with recovery of construction contingency beginning in the year following actual expenditure. The under recovered balance at December 201531, 2019 was $175 million and the remaining three beganestimated compliance costs expected to be incurred in the fourth quarter 2016. In December 2015, the Georgia PSC approved Georgia Power's request to build, own,2020, 2021, and operate a 31-MW solar generation facility at a U.S. Marine Corps base that2022 are $265 million, $290 million, and $390 million, respectively. The ECCR tariff is expected to begin commercial operation by summer 2017be revised for actual expenditures and a 15-MW solar generation facility at a yet-to-be-determined U.S. military base. The ultimate outcome of this matter cannot be determined at this time.
Two PPAs for biomass generation capacity of 58 MWs each were executed in June 2015updated estimates through future annual compliance filings. See "Environmental MattersEnvironmental Laws and November 2015RegulationsCoal Combustion Residuals" and are expected to begin in 2019.
SeeFINANCIAL CONDITION AND LIQUIDITY – "Georgia PowerIntegrated Resource PlanCapital Requirements" and "Contractual Obligations" herein for additional information on Georgia Power's renewables.
In April 2015, the Florida PSC approved Gulf Power's three energy purchase agreements totaling 120 MWs of utility-scale solar generation located at three military installations in northwest Florida. Purchases under these solar agreements are expected to begin by the summer of 2017.
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The Florida PSC issued a final approval order on Gulf Power's Community Solar Pilot Program on April 15, 2016. The program will offer Gulf Power's customers an opportunity to voluntarily contribute to the construction and operation of a solar photovoltaic facility with electric generating capacity of up to 1 MW through annual subscriptions. The energy generated from the solar facility is expected to provide power to all of Gulf Power's customers.
On November 29, 2016, the Florida PSC approved Gulf Power's energy purchase agreement for up to 94 MWs of additional wind generation in central Oklahoma. Purchases under this agreement will be for energy only and will be recovered through Gulf Power's fuel cost recovery clause.
In November 2015, the Mississippi PSC issued orders approving three solar facilities for a combined total of approximately 105 MWs. Mississippi Power will purchase all of the energy produced by the solar facilities for the 25-year term under each of the three PPAs. The projects are expected to be in service by the second quarter 2017 and the resulting energy purchases are expected to be recovered through Mississippi Power's fuel cost recovery mechanism. Mississippi Power may retire the RECs generated on behalf of its customers or sell the RECs, separately or bundled with energy, to third parties.
See Note 126 to the financial statements for additional information on Southernregarding Georgia Power's renewables activities.AROs.
On February 4, 2020, the Georgia PSC voted to deny a motion for reconsideration filed by the Sierra Club regarding the Georgia PSC's decision in the 2019 ARP allowing Georgia Power to recover compliance costs for CCR AROs.
Additionally, the Georgia PSC rejected a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020 following the expiration of a wholesale PPA. Georgia Power may offer such capacity in the wholesale market or to the retail jurisdiction in a future IRP.
The Georgia PSC also approved Georgia Power to (i) issue requests for proposals (RFP) for capacity beginning in 2022 or 2023 and in 2026, 2027, or 2028; (ii) procure up to an additional 2,210 MWs of renewable resources through competitive RFPs; and (iii) invest in a portfolio of up to 80 MWs of battery energy storage technologies.
Fuel Cost Recovery
The traditional electric operating companies each haveGeorgia Power has established fuel cost recovery rates approved by their respective state PSCs. the Georgia PSC. Georgia Power is scheduled to file its next fuel case no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million. At December 31, 2019, Georgia Power's over recovered fuel balance was $73 million.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's or Georgia Power's revenues or net income but will affect operating cash flows.
Storm Damage Recovery
Beginning January 1, 2020, Georgia Power is recovering $213 million annually through December 31, 2022, as provided in the 2019 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2019, the balance in the regulatory asset related to storm damage was $410 million. The rate of storm damage cost recovery is expected to be adjusted in future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's or Georgia Power's financial statements. See Note 2 to the financial statements under "Georgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.
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2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 currently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,
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deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.
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Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion,
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and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 to the financial statements for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and Mississippi Power's financial statements.
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Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale
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cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flow. Theflows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional electric operating companies continuously monitor their under or over recovered fuel cost balances and make appropriate filings with their state PSCs to adjust fuelnatural gas cost recovery ratesmechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as necessary.
regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. See Note 12 to the financial statements under "RevenuesSouthern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information regarding infrastructure replacement programs at certain of the natural gas distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(a)Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.
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Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 32 to the financial statements under "Regulatory MattersSouthern Company GasAlabama PowerRate ECR" and "Regulatory MattersGeorgia PowerFuel Cost RecoveryProceedings" for additional information.
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Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Program
OverviewPrograms
The subsidiary companies of Southern CompanyRegistrants are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, adding environmental modifications to certain existing units, expanding and improving the electric transmission and electric and natural gas distribution systems, and updatingundertaking projects to comply with environmental laws and expanding the natural gas distribution systems. regulations.
For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the financial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. The Southern Company system's construction program is currently estimated to total approximately $9.1 billion, $8.2 billion, $7.3 billion, $6.9 billion, and $6.4 billion for 2017, 2018, 2019, 2020, and 2021, respectively.
The two largest construction projects currently underway in the Southern Company system are Plant Vogtle Units 3 and 4 (45.7% ownership interest by Georgia Power in the two units, each with approximately 1,100 MWs) and Mississippi Power's Kemper IGCC. See Note 3 to the financial statements under "Regulatory MattersGeorgia PowerNuclear Construction" and "Integrated Coal Gasification Combined Cycle" for additional information. See Note 12 to the financial statements under "Southern PowerConstruction Projects" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities. See Note 3 to the financial statements under "Regulatory MattersSouthern Company GasRegulatory Infrastructure Programs" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities.utilities and certain pipeline construction projects.
Also seeSee FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein for additional information regarding Southern Company'sthe Registrants' capital requirements for its subsidiaries'their construction programs.
Integrated Coal Gasification Combined Cycle
Mississippi Power continues to progress toward completing the construction and start-upprograms, including estimated totals for each of the Kemper IGCC, which was approved by the Mississippi PSC in the 2010 CPCN proceedings, subject to a construction cost cap of $2.88 billion, net of $245 million of Initial DOE Grants and excluding the Cost Cap Exceptions. The current cost estimate for the Kemper IGCC in total isnext five years.
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approximately $6.99 billion, which includes approximately $5.64 billion of costs subject to the construction cost cap and is net of the $137 million in additional grants from the DOE received on April 8, 2016 (Additional DOE Grants), which are expected to be used to reduce future rate impacts to customers. Mississippi Power does not intend to seek any rate recovery for any related costs that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. Southern Company recorded pre-tax charges to income for revisions to the cost estimate subject to the construction cost cap totaling $348 million ($215 million after tax), $365 million ($226 million after tax), and $868 million ($536 million after tax) in 2016, 2015, and 2014, respectively. Since 2013, in the aggregate, Southern Company has incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016. The current cost estimate includes costs through March 15, 2017.
In addition to the current construction cost estimate, Mississippi Power is identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap. Any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in Southern Company's statements of income and these changes could be material.
The expected completion date of the Kemper IGCC at the time of the Mississippi PSC's approval in 2010 was May 2014. The combined cycle and the associated common facilities portion of the Kemper IGCC were placed in service in August 2014. The remainder of the plant, including the gasifiers and the gas clean-up facilities, represents first-of-a-kind technology. The initial production of syngas began on July 14, 2016 for gasifier "B" and on September 13, 2016 for gasifier "A." Mississippi Power achieved integrated operation of both gasifiers on January 29, 2017, including the production of electricity from syngas in both combustion turbines. Mississippi Power subsequently completed a brief outage to repair and make modifications to further improve the plant's ability to achieve sustained operations sufficient to support placing the plant in service for customers. Efforts to reach sustained operation of both gasifiers and production of electricity from syngas in both combustion turbines are in process. The plant has produced and captured CO2, and has produced sulfuric acid and ammonia, all of acceptable quality under the related off-take agreements. On February 20, 2017, Mississippi Power determined gasifier "B," which has been producing syngas over 60% of the time since early November 2016, requires an outage to remove ash deposits from its ash removal system. Gasifier "A" and combustion turbine "A" are expected to remain in operation, producing electricity from syngas, as well as producing chemical by-products. As a result, Mississippi Power currently expects the remainder of the Kemper IGCC, including both gasifiers, will be placed in service by mid-March 2017.
Upon placing the remainder of the plant in service, Mississippi Power will be primarily focused on completing the regulatory cost recovery process. In December 2015, the Mississippi PSC issued an order, based on a stipulation between Mississippi Power and the MPUS, authorizing rates that provide for the recovery of approximately $126 million annually related to Kemper IGCC assets previously placed in service.
On August 17, 2016, the Mississippi PSC established a discovery docket to manage all filings related to Kemper IGCC prudence issues. On October 3, 2016 and November 17, 2016, Mississippi Power made filings in this docket including a review and explanation of differences between the Kemper IGCC project estimate set forth in the 2010 CPCN proceedings and the most recent Kemper IGCC project estimate, as well as comparisons of current cost estimates and current expected plant operational parameters to the estimates presented in the 2010 CPCN proceedings for the first five years after the Kemper IGCC is placed in service. Compared to amounts presented in the 2010 CPCN proceedings, operations and maintenance expenses have increased an average of $105 million annually and maintenance capital has increased an average of $44 million annually for the first full five years of operations for the Kemper IGCC. Additionally, while the current estimated operational availability estimates reflect ultimate results similar to those presented in the 2010 CPCN proceedings, the ramp up period for the current estimates reflects a lower starting point and a slower escalation rate.
In the fourth quarter 2016, as a part of the Integrated Resource Plan process, the Southern Company system completed its regular annual updated fuel forecast, the 2017 Annual Fuel Forecast. This updated fuel forecast reflected significantly lower long-term estimated costs for natural gas than were previously projected. As a result of the updated long-term natural gas forecast, as well as the revised operating expense projections reflected in the discovery docket filings, on February 21, 2017, Mississippi Power filed an updated project economic viability analysis of the Kemper IGCC as required under the 2012 MPSC CPCN Order. The project economic viability analysis measures the life cycle economics of the Kemper IGCC compared to feasible alternatives, natural gas combined cycle generating units, under a variety of scenarios and considering fuel, operating and capital costs, and operating characteristics, as well as federal and state taxes and incentives. The reduction in the projected long-term natural gas prices in the
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2017 Annual Fuel Forecast and, to a lesser extent, the increase in the estimated Kemper IGCC operating costs, negatively impact the updated project economic viability analysis.
After the remainder of the plant is placed in service, AFUDC equity of approximately $11 million per month will no longer be recorded in income, and Mississippi Power expects to incur approximately $25 million per month in depreciation, taxes, operations and maintenance expenses, interest expense, and regulatory costs in excess of current rates. Mississippi Power expects to file a request for authority from the Mississippi PSC and the FERC to defer all Kemper IGCC costs incurred after the in-service date that cannot be capitalized, are not included in current rates, and are not required to be charged against earnings as a result of the $2.88 billion cost cap until such time as the Mississippi PSC completes its review and includes the resulting allowable costs in rates. In the event that the Mississippi PSC does not grant Mississippi Power's request for an accounting order, these monthly expenses will be charged to income as incurred and will not be recoverable through rates. The ultimate outcome of this matter cannot now be determined but could have a material impact on Southern Company's result of operations, financial condition, and liquidity.
Mississippi Power is required to file a rate case to address Kemper IGCC cost recovery by June 3, 2017 (2017 Rate Case). Costs incurred through December 31, 2016 totaled $6.73 billion, net of the Initial and Additional DOE Grants. Of this total, $2.76 billion of costs has been recognized through income as a result of the $2.88 billion cost cap, $0.83 billion is included in retail and wholesale rates for the assets in service, and the remainder will be the subject of the 2017 Rate Case to be filed with the Mississippi PSC and expected subsequent wholesale Municipal and Rural Associations rate filing with the FERC. Mississippi Power continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. Mississippi Power also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further herein, these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs, net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, Mississippi Power is developing both a traditional rate case requesting full cost recovery of the $3.31 billion (net of $137 million in Additional DOE Grants) not currently in rates and a rate mitigation plan that together represent Mississippi Power's probable filing strategy. Mississippi Power also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both Mississippi Power and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on Southern Company's financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, Mississippi Power intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
Mississippi Power has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017. Given the variety of potential scenarios and the uncertainty of the outcome of future regulatory proceedings with the Mississippi PSC (and any subsequent related legal challenges), the ultimate outcome of these matters cannot now be determined but could result in further charges that could have a material impact on Southern Company's results of operations, financial condition, and liquidity.
Southern Company and Mississippi Power are defendants in various lawsuits that allege improper disclosure about the Kemper IGCC, as discussed below under "Litigation." In addition, the SEC is conducting a formal investigation of Southern Company and Mississippi Power concerning the estimated costs and expected in-service date of the Kemper IGCC. Southern Company believes the investigation is focused primarily on periods subsequent to 2010 and on accounting matters, disclosure controls and procedures, and internal controls over financial reporting associated with the Kemper IGCC. See "Other Matters" herein for additional information.
The ultimate outcome of these matters cannot be determined at this time. See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information.
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Litigation
On April 26, 2016, a complaint against Mississippi Power was filed in Harrison County Circuit Court (Circuit Court) by Biloxi Freezing & Processing Inc., Gulfside Casino Partnership, and John Carlton Dean, which was amended and refiled on July 11, 2016 to include, among other things, Southern Company as a defendant. On August 12, 2016, Southern Company and Mississippi Power removed the case to the U.S. District Court for the Southern District of Mississippi. The plaintiffs filed a request to remand the case back to state court, which was granted on November 17, 2016. The individual plaintiff, John Carlton Dean, alleges that Mississippi Power and Southern Company violated the Mississippi Unfair Trade Practices Act. All plaintiffs have alleged that Mississippi Power and Southern Company concealed, falsely represented, and failed to fully disclose important facts concerning the cost and schedule of the Kemper IGCC and that these alleged breaches have unjustly enriched Mississippi Power and Southern Company. The plaintiffs seek unspecified actual damages and punitive damages; ask the Circuit Court to appoint a receiver to oversee, operate, manage, and otherwise control all affairs relating to the Kemper IGCC; ask the Circuit Court to revoke any licenses or certificates authorizing Mississippi Power or Southern Company to engage in any business related to the Kemper IGCC in Mississippi; and seek attorney's fees, costs, and interest. The plaintiffs also seek an injunction to prevent any Kemper IGCC costs from being charged to customers through electric rates. On December 7, 2016, Southern Company filed motions to dismiss.
On June 9, 2016, Treetop Midstream Services, LLC (Treetop) and other related parties filed a complaint against Mississippi Power, Southern Company, and SCS in the state court in Gwinnett County, Georgia. The complaint relates to the cancelled CO2 contract with Treetop and alleges fraudulent misrepresentation, fraudulent concealment, civil conspiracy, and breach of contract on the part of Mississippi Power, Southern Company, and SCS and seeks compensatory damages of $100 million, as well as unspecified punitive damages. Southern Company, Mississippi Power, and SCS have moved to compel arbitration pursuant to the terms of the CO2 contract.
Southern Company believes these legal challenges have no merit; however, an adverse outcome in these proceedings could have an impact on Southern Company's results of operations, financial condition, and liquidity. Southern Company will vigorously defend itself in these matters, and the ultimate outcome of these matters cannot be determined at this time.
Nuclear Construction
In 2008,2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power acting for itselfholds a 45.7% ownership interest in Plant Vogtle Units 3 and as agent for Oglethorpe Power Corporation (OPC),4. In 2012, the Municipal Electric AuthorityNRC issued the related combined construction and operating licenses, which allowed full construction of Georgia (MEAG Power), and the City of Dalton, Georgia (Dalton), acting by and through its Board of Water, Light, and Sinking Fund Commissioners, doing business as Dalton Utilities (collectively, Vogtle Owners), entered into an agreement with a consortium consisting of Westinghouse and Stone & Webster, Inc., which was subsequently acquired by Westinghouse and changed its name to WECTEC Global Project Services Inc. (WECTEC) (Westinghouse and WECTEC, collectively, Contractor), pursuant to which the Contractor agreed to design, engineer, procure, construct, and test two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities atto begin. Until March 2017, construction on Plant Vogtle (VogtleUnits 3 and 4 Agreement).
Under the terms ofcontinued under the Vogtle 3 and 4 Agreement,
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which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Owners agreed to payServices Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a purchase price subject to certain price escalationstime and adjustments, including fixed escalation amountsmaterials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and index-based adjustments, as well as adjustments for change orders, and performance bonuses for early completion and unit performance. Thetesting of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement also provides for liquidated damages upon the Contractor's failure to fulfill the schedule and performance guarantees, subject to an aggregate cap of 10% of the contract price, or approximately $920 million to $930 million. In addition, the Vogtle 3 and 4 Agreement provides for limited cost sharingis terminable by the Vogtle Owners for Contractor costs under certain conditions (whichupon 30 days' written notice.
In October 2017, Georgia Power, has not been notified have occurred) with maximum additional capitalacting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs under this provision attributableplus a base fee and an at-risk fee, which is subject to Georgia Power (basedadjustment based on Georgia Power's ownership interest) of approximately $114 million.Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (and not(not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to the ContractorBechtel under the Bechtel Agreement. The Vogtle 3 and 4 Agreement. Georgia Power's proportionate share is 45.7%. InOwners may terminate the event of certain credit rating downgrades ofBechtel Agreement at any time for their convenience, provided that the Vogtle Owner, such Vogtle OwnerOwners will be required to provide a letter of credit or other credit enhancement.
Certain obligations of Westinghouse have been guaranteed by Toshiba Corporation (Toshiba), Westinghouse's parent company. Inpay amounts related to work performed prior to the event of certain credit rating downgrades of Toshiba, Westinghouse is required to provide letters of credit or other credit enhancement. In December 2015, Toshiba experienced credit rating downgrades and Westinghouse providedtermination (including the Vogtle Owners with $920 million of letters of credit. These letters of credit remain in place in accordance with the termsapplicable portion of the Vogtle 3base fee), certain termination-related costs, and, 4 Agreement.
On February 14, 2017, Toshiba announced preliminary earnings results for the period ended December 31, 2016, which included a substantial goodwill impairment charge at Westinghouse attributed to increased cost estimates to complete its U.S. nuclear projects, including Plant Vogtle Units 3 and 4. Toshiba also warned that it will likely be in a negative equity position as a resultcertain stages of the charges. Atwork, the same time, Toshiba reaffirmed its commitment to its U.S. nuclear projects with implementation of
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management changes and increased oversight. An inability or failure by the Contractor to perform its obligations under the Vogtle 3 and 4 Agreement could have a material impact on the construction of Plant Vogtle Units 3 and 4.
Under the termsapplicable portion of the Vogtle 3 and 4 Agreement, the Contractor does not have a right to terminate the Vogtle 3 and 4 Agreement for convenience. The Contractorat-risk fee. Bechtel may terminate the Vogtle 3 and 4Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspension or delayssuspensions of work, action by a governmental authority to permanently stop work, certain breaches of the Vogtle 3 and 4Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. In
See Note 8 to the eventfinancial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of an abandonment of work by the Contractor, the maximum liabilitydefault, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of the Contractor under theremaining estimated capital cost to complete Plant Vogtle Units 3 and 4 Agreementby the expected in-service dates of November 2021 and November 2022, respectively, is increased significantly, but remains subjectas follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to limitations. The Vogtle Ownersthe base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may terminate the Vogtle 3 and 4 Agreement at any time for convenience, provided that the Vogtle Owners will be required to pay certain termination costs.
In 2009,request the Georgia PSC voted to certifyevaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 withwill total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a certified capital costregular basis to incorporate current information available, particularly in the areas of $4.418 billion. commodity installation, system turnovers, and workforce statistics.
In addition, in 2009 the Georgia PSC approved inclusionApril 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of the Plant Vogtle Units 3a strategy to maintain and, 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for nuclear construction projects certified by the Georgia PSC. Financing costs are recovered on all applicable certified costs through annual adjustmentswhere possible, build margin to the NCCR tariff by including the related CWIP accounts in rate base during the construction period. The Georgia PSC approved an NCCR tariff of $368 million for 2014, as well as increases to the NCCR tariff of approximately $27 million and $19 million effective January 1, 2015 and 2016, respectively.
Georgia Power is required to file semi-annual Vogtle Construction Monitoring (VCM) reports with the Georgia PSC by February 28 and August 31 each year. In accordance with the 2009 certification order, Georgia Power requested amendments to the Plant Vogtle Units 3 and 4 certificate in both the February 2013 (eighth VCM) and February 2015 (twelfth VCM) filings, when projected construction capital costs to be borne by Georgia Power increased by 5% above the certified costs and estimatedregulatory-approved in-service dates were extended. In October 2013, the Georgia PSC approved a stipulation (2013 Stipulation) between Georgia Power and the Georgia PSC Staff to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate until the completion of Plant Vogtle Unit 3 or earlier if deemed appropriate by the Georgia PSC and Georgia Power. In April 2015, the Georgia PSC recognized that the certified cost and the 2013 Stipulation did not constitute a cost recovery cap and deemed the amendment requested in the February 2015 filing unnecessary and withdrawn until the completion of construction of Plant Vogtle Unit 3 consistent with the 2013 Stipulation.
On December 31, 2015, Westinghouse and the Vogtle Owners entered into a definitive settlement agreement (Contractor Settlement Agreement) to resolve disputes between the Vogtle Owners and the Contractor under the Vogtle 3 and 4 Agreement, including litigation that was pending in the U.S. District Court for the Southern District of Georgia (Vogtle Construction Litigation). Effective December 31, 2015, Georgia Power, acting for itself and as agent for the other Vogtle Owners, and the Contractor entered into an amendment to the Vogtle 3 and 4 Agreement to implement the Contractor Settlement Agreement. The Contractor Settlement Agreement and the related amendment to the Vogtle 3 and 4 Agreement (i) restrict the Contractor's ability to seek further increases in the contract price by clarifying and limiting the circumstances that constitute nuclear regulatory changes in law; (ii) provide for enhanced dispute resolution procedures; (iii) revise the guaranteed substantial completion dates to June 30, 2019November 2021 for Unit 3 and June 30, 2020November 2022 for Unit 4; (iv) provide that delay liquidated damages will commence if the nuclear fuel loading date for each unit does not occur by December 31, 2018 for Unit 3 and December 31, 2019 for Unit 4; and (v) provide that Georgia Power, based on its ownership interest, will pay to the Contractor and capitalize to the4. The project cost approximately $350 million, of which approximately $263 million had been paid as of December 31, 2016. In addition, the Contractor Settlement Agreement provides for the resolution of other open existing items relating to the scope of the project under the Vogtle 3 and 4 Agreement, including cyber security, for which costs are reflected in Georgia Power's current in-service forecast of $5.440 billion. Further, as part of the settlement and Westinghouse's acquisition of WECTEC: (i) Westinghouse engaged Fluor Enterprises, Inc., a subsidiary of Fluor Corporation, as a new construction subcontractor and (ii) the Vogtle Owners, Chicago Bridge & Iron Co, N.V., and The Shaw Group Inc. entered into mutual releases of any and all claims arising out of events or circumstances in connectionhas faced challenges with the constructionApril 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of Plant Vogtle Units 3activities and 4 that occurred on or beforecompletion percentages below the date of the Contractor Settlement Agreement. On January 5, 2016, the Vogtle Construction Litigation was dismissed with prejudice.
On December 20, 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving the following prudence matters: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report will be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement is reasonable and prudent and none of the amounts paid or to be paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) financing costs on verified and approved capital costs will be deemed prudent provided they are incurred prior to December 31,April 2019 and December 31, 2020 for Plant Vogtle Units 3 and 4, respectively; and (iv) (a) the in-service capital cost forecast will be adjusted to $5.680 billion (Revised Forecast), which includes a contingency of $240 million above Georgia Power's current forecast of $5.440 billion, (b) capital costs incurred up to theaggressive strategy targets. However,
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Revised Forecast will be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, and (c) Georgia Power would have the burden to show that any capital costs above the Revised Forecast are reasonable and prudent. Under the terms of the Vogtle Cost Settlement Agreement, the certified in-service capital cost for purposes of calculating the NCCR tariff will remain at $4.418 billion. Construction capital costs above $4.418 billion will accrue AFUDC through the date each unit is placed in service. The ROE used to calculate the NCCR tariff was reduced from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016. For purposes of the AFUDC calculation, the ROE on costs between $4.418 billion and $5.440 billion will also be 10.00% and the ROE on any amounts above $5.440 billion would be Georgia Power's average cost of long-term debt. If the Georgia PSC adjusts Georgia Power's ROE rate setting point in a rate case prior to Plant Vogtle Units 3 and 4 being placed into retail rate base, then the ROE for purposes of calculating both the NCCR tariff and AFUDC will likewise be 95 basis points lower than the revised ROE rate setting point. If Plant Vogtle Units 3 and 4 are not placed in service by December 31, 2020, then (i) the ROE for purposes of calculating the NCCR tariff will be reduced an additional 300 basis points, or $8 million per month, and may, at the Georgia PSC's discretion, be accrued to be used for the benefit of customers, until such time as the units are placed in service and (ii) the ROE used to calculate AFUDC will be Georgia Power's average cost of long-term debt.
Under the terms of the Vogtle Cost Settlement Agreement, Plant Vogtle Units 3 and 4 will be placed into retail rate base on December 31, 2020 or when placed in service, whichever is later. The Georgia PSC will determine for retail ratemaking purposes the process of transitioning Plant Vogtle Units 3 and 4 from a construction project to an operating plant no later than Georgia Power's base rate case required to be filed by July 1, 2019.
The Georgia PSC has approved fifteen VCM reports covering the periods through June 30, 2016, including construction capital costs incurred, which through that date totaled $3.7 billion. Georgia Power expects to file the sixteenth VCM report, covering the period from July 1 through December 31, 2016, requesting approval of $222 million of construction capital costs incurred during that period, with the Georgia PSC by February 28, 2017. Georgia Power's CWIP balance for Plant Vogtle Units 3 and 4 was approximately $3.9 billion as of December 31, 2016,Southern Nuclear and Georgia Power had incurred $1.3 billion in financing costs through December 31, 2016.believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
AsIn February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of December 31, 2016,November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power had borrowed $2.6 billioncontinue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to Plant Vogtle Units 3attract and 4 costs through a loan guarantee agreement between Georgia Powerretain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the DOEinitial testing and a multi-advance credit facility among Georgia Power,start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the DOE,last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the FFB. See Note 6 to the financial statements under "DOE Loan Guarantee Borrowings" for additional information, including applicable covenants, events of default,projected schedule and mandatory prepayment events.estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise as construction proceeds.arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolutionsubmittal by Southern Nuclear of Inspections, Tests, Analyses, and Acceptance Criteriathe ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, as construction proceeds, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs eitherof approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners or the Contractor orentered into an amendment to both.
In addition to Toshiba's reaffirmation of its commitment, the Contractor provided Georgia Power with revised forecasted in-service dates of December 2019 and September 2020 for Plant Vogtle Units 3 and 4, respectively. Georgia Power is currently reviewing a preliminary summary schedule supporting these dates that ultimately must be reconciled to a detailed integrated project schedule. As construction continues, the risk remains that challenges with Contractor performance including labor productivity, fabrication, delivery, assembly, and installation of plant systems, structures, and components, or other issues could arise and may further impact project schedule and cost. Georgia Power expects the Contractor to employ mitigation efforts and believes the Contractor is responsible for any related costs under the Vogtle 3 and 4 Agreement. Georgia Power estimates its financing coststheir joint ownership agreements for Plant Vogtle Units 3 and 4 to be approximately $30 million per month,provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with total construction period financing costs of approximately $2.5 billion. Additionally,the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power estimates its owner's costsor Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to be approximately $6 million per month, netremoval of delay liquidated damages.Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
The revised forecasted in-service dates are within the timeframe contemplatedAs a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Cost Settlement AgreementUnits 3 and would enable both units4 were required to qualify for production tax creditsvote to continue construction. In September 2018, the IRS has allocatedVogtle Owners unanimously voted to eachcontinue construction of Plant Vogtle Units 3 and 4, which require the applicable unit to be placed in service before 2021. The net present value of the production tax credits is estimated at approximately $400 million per unit.4.
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Future claims byAmendments to the Contractor orVogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power (on behalfentered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owners) could arise throughout construction. These claims may be resolved through formal and informal dispute resolution procedures under the Vogtle 3 and 4 Agreement and, under the enhanced dispute resolution procedures, may be resolved through litigation after the completion of nuclear fuel load for both units.Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,
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$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.
The ultimate outcome of these matters cannot be determined at this time.
Southern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
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(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 2019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure. In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential
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variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Rate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in two significant pipeline construction projects within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approval.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.
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Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was no impairment as of December 31, 2019.
See Notes 3 and 7 to the financial statements under "Guarantees" and "Southern Company GasEquity Method Investments," respectively, for additional information on these pipeline projects.
Southern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and
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from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Bonus DepreciationConsolidated Income Taxes
On behalf of the Registrants, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In December 2015,accordance with IRS regulations, each company is jointly and severally liable for the Protecting Americans from federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect each Registrant's ability to utilize certain tax credits. See "Tax Hikes (PATH) ActCredits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 10 to the financial statements for additional information.
Federal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law. law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
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Bonus depreciation was extended for qualified propertyDepreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service through 2020. The PATH Act allowsafter September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension ofBased on provisional estimates, bonus depreciation included in the PATH Act is expected to result in approximately $1.3 billion of positive cash flows for the 2016 tax year, which was not all realized in 2016 due to a projected consolidated net operating loss (NOL) for Southern Company. Approximately $1.2 billion of positive cash flows is expected to result from bonus depreciation for the 2017 tax year, but may not all be realized in 2017 due to additional NOL projections for the 2017 tax year. As a result of the schedule extension for the Kemper IGCC, approximately $370 million of the 2017 benefit is dependent upon placing the remainder of the Kemper IGCC in service by December 31, 2017. Registrants as follows:
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Cash flows resulting from bonus depreciation for Southern Power would also be impacted by Southern Power's use of tax equity partnerships.
See Note 310 to the financial statements under "Integrated Coal Gasification Combined Cycle" and Note 5 to the financial statements under "Current and Deferred Income TaxesNet Operating Loss" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Tax CreditsRate CNP Compliance
The PATH ActRate CNP Compliance allows for 30% ITCthe recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for solar projectsthe recovery of these costs pursuant to factors that commence constructionare calculated and submitted to the Alabama PSC by December 31, 2019; 26% ITC1 with rates effective for solar projects that commence construction in 2020; 22% ITC for solar projects that commence construction in 2021;the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a permanent 10% ITCreturn on certain invested capital. Revenues for solar projectsRate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On November 27, 2019, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that commence constructionbecame effective for the billing month of January 2020.
Rate ECR
Rate ECR recovers Alabama Power's retail energy costs based on an estimate of future energy costs and the current over or afterunder recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed gives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income but will impact operating cash flows. The Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
On December 3, 2019, the Alabama PSC approved a decrease to Rate ECR from 2.353 to 2.160 cents per KWH, equal to 1.82%, or approximately $102 million annually, effective January 1, 2022. 2020. The rate will adjust to 5.910 cents per KWH in January 2021 absent a further order from the Alabama PSC.
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Tax Reform Accounting Order
In addition,May 2018, the PATH Act extendedAlabama PSC approved an accounting order that authorized Alabama Power to defer the PTCbenefits of federal excess deferred income taxes associated with the Tax Reform Legislation for wind projects withthe year ended December 31, 2018 as a phase out that allowsregulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for 100% PTC for wind projects that commenced constructionthe year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power to apply the remaining deferred balance of approximately $39 million to increase the balance in 2016; 80% PTC for wind projects that commence construction in 2017; 60% PTC for wind projects that commence construction in 2018;the NDR. See "Rate NDR" herein and 40% PTC for wind projects that commence construction in 2019. The Company has received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power. See Note 110 to the financial statements under "Current and Deferred Income and Other Taxes" andfor additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Current and Deferred Income TaxesTax Credit CarryforwardsJoint Ownership Agreements" for additional information regarding utilizationthe joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a four-year acceleration of the retirement of Plant Greene County Units 1 and amortization of credits2 to the third quarter 2021 and the tax benefit relatedthird quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to basis differences.
Section 174 Researchmonitor the status of Mississippi Power's proposed RMP and Experimental Deduction
Southern Company reflected deductions for researchassociated regulatory process as well as the proposed transmission and experimental (R&E) expenditures relatedsystem reliability improvements. Alabama Power will review all the facts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the Kemper IGCC in its federal income tax calculations since 2013 and filed amended federal income tax returns for 2008 through 2013 to also include such deductions. In December 2016, Southern Company and the IRS reached a proposed settlement, subject to approvalongoing operations of the U.S. Congress Joint Committee on Taxation, resolving a methodology for these deductions. Due to the uncertainty related to this tax position, Southern Company had unrecognized tax benefits associated with these R&E deductions totaling approximately $464 million as of December 31, 2016. See "Bonus Depreciation" herein and Note 5 to the financial statements under "Unrecognized Tax Benefits" for additional information. This matter is expected to be resolved in the next 12 months; however, thePlant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Other MattersRate NDR
Southern CompanyBased on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its subsidiaries are involved in various other matters being litigatedtransmission and regulatory matters that could affectdistribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future earnings. In addition, Southern Companystorms and its subsidiaries are subjectis an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to certain claimsallow recovery of any existing deferred storm-related operations and legal actions arisingmaintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the ordinary courseNDR when costs of business.storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The business activitiesorder allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of Southern Company's subsidiariesthe NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are subjectincurred. Accruals that have not been designated can be used to extensive governmental regulationoffset storm charges. Additional accruals to the NDR enhance Alabama Power's ability to mitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear.
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements, such as air quality and water standards, has occurred throughoutNDR will also be recognized. As a result, the U.S. This litigation has included claims for damages alleged toRate NDR charge will not have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation against Southern Company and its subsidiaries cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Note 3 to the financial statements, managementan effect on net income but will impact operating cash flows.
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does not anticipate thatEnvironmental Accounting Order
Based on an order from the ultimate liabilities, if any, arising from such current proceedings would haveAlabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a material effect on Southern Company's financial statements.regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
On April 15, 2019, Alabama Power retired Plant Gorgas Units 8, 9, and 10 and reclassified approximately $654 million of the unrecovered asset balances to regulatory assets, which are being recovered over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 32 to the financial statements under "Alabama Power" and Note 6 to the financial statements for additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through an alternate rate plan, which includes traditional base tariffs, Demand-Side Management (DSM) tariffs, the ECCR tariff, and Municipal Franchise Fee (MFF) tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a discussion of various other contingencies, regulatory matters,separate fuel cost recovery tariff. See Note 2 to the financial statements under "Georgia PowerRate Plans," " – Fuel Cost Recovery," and other matters being litigated which may affect future earnings potential." – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 20, 2017,1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a purported securities class action complaint was filed against retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%
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(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP continued in effect until December 31, 2019. Furthermore, through December 31, 2019, Georgia Power retained its and Mississippi Power's officersmerger savings, net of transition costs, as defined in the U.S. District Courtsettlement agreement; through December 31, 2022, such net merger savings will be shared on a 60/40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariffs, ECCR tariff, DSM tariffs, or MFF tariffs in 2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE was set at 10.95% and earnings were evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% were to be directly refunded to customers, with the remaining one-third retained by Georgia Power. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2019 and 2018, Georgia Power's retail ROE exceeded 12.00% and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia Power has reduced regulatory assets by a total of approximately $110 million and expects to refund a total of approximately $110 million to customers, subject to review and approval by the Georgia PSC. See "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Integrated Resource Plan
See "Environmental Matters" herein for additional information regarding proposed and final EPA rules and regulations, including revisions to ELG for steam electric power plants and additional regulations of CCR and CO2.
On July 16, 2019, the Georgia PSC voted to approve Georgia Power's modified triennial IRP (Georgia Power 2019 IRP). In the Georgia Power 2019 IRP, the Georgia PSC approved the decertification and retirement of Plant Hammond Units 1 through 4 (840 MWs) and Plant McIntosh Unit 1 (142.5 MWs) effective July 29, 2019. In accordance with the 2019 ARP, the remaining net book values at December 31, 2019 of $488 million for the Northern DistrictPlant Hammond units are being recovered over a period equal to the respective unit's remaining useful life, which varies between 2024 and 2035, and $30 million for Plant McIntosh Unit 1 is being recovered over a three-year period ending December 31, 2022. In addition, approximately $20 million of related unusable materials and supplies inventory balances and approximately $295 million of net capitalized asset retirement costs were reclassified to a regulatory asset. In accordance with the modifications to the earnings sharing mechanism approved in the 2019 ARP, Georgia Atlanta Division, by Monroe County Employees' Retirement System on behalfPower fully amortized the regulatory assets associated with these unusable materials and supplies inventory
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balances as well as a regulatory asset of approximately $50 million related to costs for a future generation site in Stewart County, Georgia. See "Rate Plans – 2019 ARP" herein for additional information.
Also in the Georgia Power 2019 IRP, the Georgia PSC approved Georgia Power's proposed environmental compliance strategy associated with ash pond and certain landfill closures and post-closure care in compliance with the CCR Rule and the related state rule. In the 2019 ARP, the Georgia PSC approved recovery of itsthe estimated under recovered balance of these compliance costs at December 31, 2019 over a three-year period ending December 31, 2022 and Mississippirecovery of estimated compliance costs for 2020, 2021, and 2022 over three-year periods ending December 31, 2022, 2023, and 2024, respectively, with recovery of construction contingency beginning in the year following actual expenditure. The under recovered balance at December 31, 2019 was $175 million and the estimated compliance costs expected to be incurred in 2020, 2021, and 2022 are $265 million, $290 million, and $390 million, respectively. The ECCR tariff is expected to be revised for actual expenditures and updated estimates through future annual compliance filings. See "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and "Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Georgia Power's officers made materially false and misleading statementsAROs.
On February 4, 2020, the Georgia PSC voted to deny a motion for reconsideration filed by the Sierra Club regarding the Kemper IGCCGeorgia PSC's decision in violationthe 2019 ARP allowing Georgia Power to recover compliance costs for CCR AROs.
Additionally, the Georgia PSC rejected a request to certify approximately 25 MWs of certain provisionscapacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020 following the expiration of a wholesale PPA. Georgia Power may offer such capacity in the wholesale market or to the retail jurisdiction in a future IRP.
The Georgia PSC also approved Georgia Power to (i) issue requests for proposals (RFP) for capacity beginning in 2022 or 2023 and in 2026, 2027, or 2028; (ii) procure up to an additional 2,210 MWs of renewable resources through competitive RFPs; and (iii) invest in a portfolio of up to 80 MWs of battery energy storage technologies.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. Georgia Power is scheduled to file its next fuel case no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the Securities Exchange Actnext fuel case if the under or over recovered fuel balance exceeds $200 million. At December 31, 2019, Georgia Power's over recovered fuel balance was $73 million.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of 1934,an array of derivative instruments within a 48-month time horizon.
Fuel cost recovery revenues as amended. The complaint seeks, among other things, compensatory damages and litigationrecorded on the financial statements are adjusted for differences in actual recoverable fuel costs and attorneys' fees.amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company believesCompany's or Georgia Power's revenues or net income but will affect operating cash flows.
Storm Damage Recovery
Beginning January 1, 2020, Georgia Power is recovering $213 million annually through December 31, 2022, as provided in the 2019 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2019, the balance in the regulatory asset related to storm damage was $410 million. The rate of storm damage cost recovery is expected to be adjusted in future regulatory proceedings as necessary. As a result of this legal challenge has no merit; however, an adverse outcome in this proceeding couldregulatory treatment, costs related to storms are not expected to have ana material impact on Southern Company's resultsor Georgia Power's financial statements. See Note 2 to the financial statements under "Georgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of operations,the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial condition, and liquidity. statements under "Mississippi Power" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company will vigorously defend itselfand Subsidiary Companies 2019 Annual Report

2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in this matter,Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
The SEC is conducting a formal investigationOperations Review
In August 2018, the Mississippi PSC began an operations review of Southern Company and Mississippi Power, concerningfor which the estimated costs andfinal report is expected in-service dateprior to the conclusion of the Kemper IGCC. Southern Company believesMississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the investigation is focused primarily on periods subsequent to 2010 and on accounting matters, disclosure controls and procedures, and internal controls over financial reporting associated with the Kemper IGCC. See ACCOUNTING POLICIES – "Applicationreasonable benefit of Critical Accounting Policies and Estimates" herein for additional information on the Kemper IGCC estimated construction costs and expected in-service date.ratepayers. The ultimate outcome of this matter cannot be determined at this time; however, it is not expectedtime.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to have a material impact onreduce its reserve margin and lower or avoid operating costs, with the financial statementsmost economic alternatives being the two-year and seven-year acceleration of Southern Company.
ACCOUNTING POLICIES
Applicationthe retirement of Critical Accounting PoliciesPlant Watson Units 4 and Estimates
Southern Company prepares its consolidated financial statements in accordance with GAAP. Significant accounting policies are described in Note 15, respectively, to the financial statements. Infirst quarter 2022 and the applicationfour-year acceleration of these policies, certain estimates are madethe retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that mayPlant Daniel Units 1 and 2 currently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in theMississippi Power's financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit CommitteeThe ultimate outcome of Southern Company's Board of Directors.
Utility Regulation
Southern Company's traditional electric operating companies and natural gas distribution utilities, which collectively comprised approximately 91% of Southern Company's total operating revenues for 2016, are subject to retail regulation by their respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the FERC. These regulatory agencies set the rates the traditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result, the traditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they wouldthis matter cannot be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on the Company's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the Company's results of operations and financial condition than they would on a non-regulated company.
As reflected indetermined at this time. See Note 13 to the financial statements significant regulatory assetsunder "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and liabilities have been recorded. Management reviews2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the ultimate recoverabilityPEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of these regulatory assetsresults in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and any requirementcustomer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to refund these regulatory liabilitiesthe beginning of the year based on applicable regulatory guidelinesa projected revenue requirement, and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amountsPEP lookback filing, which is filed after the end of such regulatory assetsthe year and liabilities and could adversely impactallows for review of the Company's financial statements.actual revenue requirement compared to the projected filing.
Kemper IGCC Estimated Construction Costs, Project Completion Date, and Rate Recovery
During 2016,In February 2018, Mississippi Power further revised its cost estimateannual projected PEP filing for 2018 to complete construction and start-upreflect the impacts of the Kemper IGCC toTax Reform Legislation. The revised filing requested an amount that exceedsincrease of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the $2.88 billion cost cap, netMPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the Initial DOE Grantscontested compensation costs for 2018 and excluding the Cost Cap Exceptions. Mississippi2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,
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deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power does not intend2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ratePEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for any costsamortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.
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Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper IGCC that exceed theCounty energy facility. The order approved a construction cost cap of up to $2.88 billion, cost cap, netwith recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Initial DOE GrantsKemper County energy facility in service in August 2014. The combined cycle and excludingassociated common facilities portions of the Cost Cap Exceptions.Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
AsIn June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a resultsettlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of revisionspursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate Southern Company recorded total pre-tax charges to income for the estimated probable losses on the Kemper IGCCCounty energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $127$137 million ($78 million after tax) in additional grants from the fourth quarter 2016, $88 million ($54 million after tax)DOE received in the third quarter 2016, $81 million ($50 million after tax) in the second quarter 2016, $53 million ($33 million after tax) in the first quarter 2016, $183 million ($113 million after tax) in the fourth quarter 2015, $150 million ($93 million after tax) in the third quarter 2015, $23 million ($14 million after tax) in the second quarter 2015, $9 million ($6 million after tax) in the first quarter 2015, $70 million ($43 million after tax) in the fourth quarter 2014, $418 million ($258 million after tax) in the third quarter 2014, $380 million ($235 million after tax) in the first quarter 2014, $40 million ($25 million after tax) in the fourth quarter 2013, $150 million ($93 million after tax) in the third quarter 2013, $450 million ($278 million after tax) in the second quarter 2013, and $540 million ($333 million after tax) in the first quarter 2013.April 2016. In the aggregate, Southern Company has incurredMississippi Power had recorded charges to income of $2.76$3.07 billion ($1.711.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016.May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power's revised cost estimate reflects an expected in-service datePower expects to substantially complete mine reclamation activities in 2020 and dismantlement of mid-March 2017the abandoned gasifier-related assets and includes certain post-in-service costs whichsite restoration activities are expected to be subject to the cost cap. Mississippi Power has experienced,completed in 2024. The additional pre-tax period costs associated with dismantlement and may continue to experience, material changes in the cost estimate for the Kemper IGCC. Further cost increases and/or extensions of the expected in-service date may result from factorssite restoration activities, including but not limited to, difficulties integrating the systems required for sustained operations, sustaining nitrogen supply, major equipment failure, unforeseen engineering or design problems including any repairs and/or modifications to systems, and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC).
In addition to the current construction cost estimate, Mississippi Power is also identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap. In subsequent periods, any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in Southern Company's statements of income and these changes could be material.
Any extension of the in-service date beyond mid-March 2017 is currently estimated to result in additional base costs of approximately $25 million to $35 million per month, which includes maintaining necessary levels of start-up labor, materials, and fuel, as well as operational resources required to execute start-up and commissioning activities. However, additional costs may be required for remediation of any further equipment and/or design issues identified. Any extension of the in-service date with respect to the Kemper IGCC beyond mid-March 2017 would also increase costs for the Cost Cap Exceptions, which are not subject to the $2.88 billion cost cap established by the Mississippi PSC. These costs include AFUDC, which is currently estimated to total approximately $16 million per month, as well as carrying costscompliance and operating expenses on Kemper IGCC assets placed in service and consulting and legal fees of approximately $3 million per month.
Mississippi Power continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. Mississippi Power also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further in Note 3 to the financial statements under "Integrated Coal Gasification Combined CycleRate Recovery of Kemper IGCC Costs," " – Prudence," " – Lignite Mine and CO2 Pipeline Facilities," " – Termination of Proposed Sale of Undivided Interest," " – Bonus Depreciation," " – Investment Tax Credits," and " – Section 174 Research and Experimental Deduction," these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs, net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, Mississippi Power is developing both a traditional rate case requesting full cost recovery of the amounts not currently in rates and a rate mitigation plan that together represent Mississippi Power's probable filing strategy. Mississippi Power also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both Mississippi Power and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on Southern Company's financial statements would depend on the method, amount,safety, ARO accretion,
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and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recordedproperty taxes, are estimated to incometotal $17 million in the period incurred, while other costs, including investment-related costs, would be charged2020, $15 million to income when it is probable they will not be recovered$16 million annually in 2021 through 2023, and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, Mississippi Power intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.$5 million in 2024.
Mississippi Power has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
Given the significant judgment involved in estimating the future costs to complete construction and start-up, the project completion date, the ultimate rate recovery for the Kemper IGCC, and the potential impact on Southern Company's results of operations, Southern Company considers these items to be critical accounting estimates. See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to facilities that are subject to the CCR Rule, principally ash ponds, and the decommissioning of the Southern Company system's nuclear facilities – Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2. In addition, the Southern Company system has retirement obligations related to various landfill sites, asbestos removal, mine reclamation, land restoration related to solar and wind facilities, and disposal of polychlorinated biphenyls in certain transformers. The Southern Company system also has identified retirement obligations related to certain electric transmission and distribution facilities, certain wireless communication towers, property associated with the Southern Company system's rail lines and natural gas pipelines, and certain structures authorized by the U.S. Army Corps of Engineers. However, liabilities for the removal of these assets have not been recorded as the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their currently anticipated useful life, the traditional electric operating companies expect to continue to periodically update these estimates. See FUTURE EARNINGS POTENTIAL – "Environmental MattersEnvironmental Statutes and RegulationsCoal Combustion Residuals" herein for additional information.
Given the significant judgment involved in estimating AROs, Southern Company considers the liabilities for AROs to be critical accounting estimates.
See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" and "Nuclear Decommissioning" for additional information.
Pension and Other Postretirement Benefits
Southern Company's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the Company believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefits costs and obligations.
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Key elements in determining Southern Company's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. Southern Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to Southern Company's target asset allocation. For purposes of determining its liability related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. For 2015 and prior years, Southern Company computed the interest cost component of its net periodic pension and other postretirement benefit plan expense using the same single-point discount rate. For 2016, Southern Company adopted a full yield curve approach for calculating the interest cost component whereby the discount rate for each year is applied to the liability for that specific year. As a result, the interest cost component of net periodic pension and other postretirement benefit plan expense decreased by approximately $96 million in 2016.
The following table illustrates the sensitivity to changes in Southern Company's long-term assumptions with respect to the assumed discount rate, the assumed salaries, and the assumed long-term rate of return on plan assets:
Change in AssumptionIncrease/(Decrease) in Total Benefit Expense for 2017Increase/(Decrease) in Projected Obligation for Pension Plan at December 31, 2016Increase/(Decrease) in Projected Obligation for Other Postretirement Benefit Plans at December 31, 2016
(in millions)
25 basis point change in discount rate$34/$(39)$418/$(396)$64/$(61)
25 basis point change in salaries$20/$(19)$97/$(94)$–/$–
25 basis point change in long-term return on plan assets$31/$(31)N/AN/A
N/A – Not applicable
See Note 2 to the financial statements for additional information regarding pension and other postretirement benefits.
Goodwill and Other Intangible Assets
The acquisition method of accounting requires the assets acquired and liabilities assumed to be recorded at the date of acquisition at their respective estimated fair values. Southern Company recognizes goodwill as of the acquisition date, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment on an annual basis in the fourth quarter of the year as well as on an interim basis as events and changes in circumstances occur. Primarily as a result of the acquisitions of Southern Company Gas and PowerSecure in 2016, goodwill totaled approximately $6.3 billion at December 31, 2016.
Definite-lived intangible assets acquired are amortized over the estimated useful lives of the respective assets to reflect the pattern in which the economic benefits of the intangible assets are consumed. Whenever events or changes in circumstances indicate that the carrying amount of the intangible assets may not be recoverable, the intangible assets will be reviewed for impairment. Primarily as a result of the acquisitions of Southern Company Gas and PowerSecure and PPA fair value adjustments resulting from Southern Power's acquisitions, other intangible assets, net of amortization totaled approximately $1.0 billion at December 31, 2016.
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can significantly impact Southern Company's results of operations. Fair values and useful lives are determined based on, among other factors, the expected future period of benefit of the asset, the various characteristics of the asset, and projected cash flows. As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, Southern Company considers these estimates to be critical accounting estimates.
See Note 1 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities" for additional information regarding Southern Company's goodwill and other intangible assets and Note 12 to the financial statements for additional information related to Southern Company's recent acquisitions.
Derivatives and Hedging Activities
Derivative instruments are recorded on the balance sheets as either assets or liabilities measured at their fair value, unless the
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transactions qualify for the normal purchases or normal sales scope exception and are instead subject to traditional accrual accounting. For those transactions that do not qualify as a normal purchase or normal sale, changes in the derivatives' fair values are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI until the hedged transaction affects earnings in the case of a cash flow hedge. Certain subsidiaries of Southern Company enter into energy-related derivatives that are designated as regulatory hedges where gains and losses are initially recorded as regulatory liabilities and assets and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through billings to customers.
Southern Company uses derivative instruments to reduce the impact to the results of operations due to the risk of changes in the price of natural gas, to manage fuel hedging programs per guidelines of state regulatory agencies, and to mitigate residual changes in the price of electricity, weather, interest rates, and foreign currency exchange rates. The fair value of commodity derivative instruments used to manage exposure to changing prices reflects the estimated amounts that Southern Company would receive or pay to terminate or close the contracts at the reporting date. To determine the fair value of the derivative instruments, Southern Company utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Southern Company classifies derivative assets and liabilities based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of Southern Company's nonperformance risk on its liabilities.
Given the assumptions used in pricing the derivative asset or liability, Southern Company considers the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein for more information.
Contingent Obligations
Southern Company is subject to a number of federal and state laws and regulations as well as other factors and conditions that subject it to environmental, litigation, income tax, and other risks. See FUTURE EARNINGS POTENTIAL herein and Note 3 to the financial statements for more information regarding certain of these contingencies. Southern Company periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable and records a tax asset or liability if it is more likely than not that a tax position will be sustained. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect Southern Company's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While Southern Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of Southern Company's revenue, including energy provided to customers, is from tariff offerings that provide natural gas or electricity without a defined contractual term. For such arrangements, Southern Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity or natural gas supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
Southern Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on Southern Company's financial statements. In addition, the power and utilities industry is currently
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


addressing other specific industry issues, including the applicability of ASC 606 to CIAC. If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on Southern Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. Southern Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, Southern Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. Southern Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on Southern Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, Southern Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. Southern Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. Southern Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of Southern Company. See Notes 5, 8, and 14 to the financial statements for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Southern Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
On November 17, 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statement of cash flows. Upon adoption, the net change in cash and cash equivalents during the period will include amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to each period presented. Southern Company does not intend to adopt the guidance early. The adoption of ASU 2016-18 will not have a material impact on the financial statements of Southern Company.
FINANCIAL CONDITION AND LIQUIDITY
Overview
Earnings in all periods presented were negatively affected by revisions to the cost estimate for the Kemper IGCC; however, Southern Company's financial condition remained stable at December 31, 2016.
The Southern Company system's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. The Southern Company system's capital expenditures and other investing activities include investments to meet projected long-term demand requirements, including to build new electric generation facilities, to maintain existing electric generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing electric generating units, to expand and improve electric transmission and distribution facilities,
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


to update and expand natural gas distribution systems, and for restoration following major storms. Operating cash flows provide a substantial portion of the Southern Company system's cash needs. For the three-year period from 2017 through 2019, Southern Company's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. Southern Company plans to finance future cash needs in excess of its operating cash flows primarily by accessing borrowings from financial institutions and through debt and equity issuances in the capital markets. Southern Company intends to continue to monitor its access to short-term and long-term capital markets as well as bank credit arrangements to meet future capital and liquidity needs. See FUTURE EARNINGS POTENTIAL – "Income Tax MattersBonus Depreciation" and "Sources of Capital," "Financing Activities," and "Capital Requirements and Contractual Obligations" herein for additional information.
Southern Company's investments in the qualified pension plans and the nuclear decommissioning trust funds increased in value as of December 31, 2016 as compared to December 31, 2015. On December 19, 2016, the traditional electric operating companies and certain other subsidiaries voluntarily contributed an aggregate of $900 million to Southern Company's qualified pension plan. In addition, on September 12, 2016, Southern Company Gas voluntary contributed $125 million to its qualified pension plan. No mandatory contributions to the qualified pension plans are anticipated during 2017. See "Contractual Obligations" herein and Notes 1 and 2 to the financial statements under "Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
Net cash provided from operating activities in 2016 totaled $4.9 billion, a decrease of $1.4 billion from 2015. The decrease in net cash provided from operating activities was primarily due to voluntary contributions to the qualified pension plan of approximately $1.0 billion and a $1.2 billion increase in unutilized ITCs and PTCs. Net cash provided from operating activities in 2015 totaled $6.3 billion, an increase of $459 million from 2014. Significant changes in operating cash flow for 2015 as compared to 2014 included an increase in fuel cost recovery, partially offset by the timing of vendor payments.
Net cash used for investing activities in 2016, 2015, and 2014 totaled $20.0 billion, $7.3 billion, and $6.4 billion, respectively. The cash used for investing activities in 2016 was primarily due to the closing of the Merger, the acquisition of PowerSecure, Southern Company Gas' investment in SNG, the construction of electric generation, transmission, and distribution facilities, the installation of equipment at electric generating facilities to comply with environmental standards, and Southern Power's acquisitions and construction of renewable facilities and a natural gas facility. The cash used for investing activities in 2015 and 2014 was primarily due to gross property additions for installation of equipment at electric generating facilities to comply with environmental standards, construction of electric generation, transmission, and distribution facilities, Southern Power's acquisitions of solar facilities, and purchases of nuclear fuel.
Net cash provided from financing activities totaled $15.7 billion in 2016 primarily due to issuances of long-term debt and common stock associated with completing the Merger and funding the subsidiaries' continuous construction programs, Southern Power's acquisitions, and Southern Company Gas' investment in SNG, partially offset by redemptions of long-term debt and common stock dividend payments. Net cash provided from financing activities totaled $1.7 billion in 2015 due to issuances of long-term debt and common stock and an increase in short-term debt, partially offset by common stock dividend payments and redemptions of long-term debt and preferred and preference stock. Net cash provided from financing activities totaled $644 million in 2014 due to issuances of long-term debt and common stock, partially offset by common stock dividend payments, redemptions of long-term debt, and a reduction in short-term debt. Fluctuations in cash flow from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Significant balance sheet changes in 2016 included an increase of $17.3 billion in total property, plant, and equipment primarily related to the inclusion of Southern Company Gas as a result of the Merger, installation of equipment at electric generating facilities to comply with environmental standards, construction of electric generation, transmission, and distribution facilities, and Southern Power's acquisitions; an increase of $6.2 billion in goodwill related to the acquisitions of Southern Company Gas and PowerSecure; an increase of $1.5 billion in equity investments in unconsolidated subsidiaries primarily related to Southern Company Gas' investment in SNG; an increase of $1.9 billion in other regulatory assets, deferred primarily related to the inclusion of Southern Company Gas as a result of the Merger and changes in ash pond closure strategy, principally for Georgia Power; increases of $17.9 billion in long-term debt and $4.6 billion in total stockholder's equity primarily associated with financing and completing the Merger and to fund the subsidiaries' continuous construction programs and Southern Power's acquisitions; and increases of $1.8 billion in accumulated deferred income taxes and $1.6 billion in other cost of removal obligations primarily related to the inclusion of Southern Company Gas as a result of the Merger. See Notes 1 and 12 to the financial statements for additional information regarding AROs and the Merger, respectively.
At the end of 2016, the market price of Southern Company's common stock was $49.19 per share (based on the closing price as reported on the New York Stock Exchange) and the book value was $25.00 per share, representing a market-to-book value ratio of 197%, compared to $46.79, $22.59, and 207%, respectively, at the end of 2015.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


Southern Company's consolidated ratio of common equity to total capitalization plus short-term debt was 33.3% and 40.5% at December 31, 2016 and 2015, respectively. See Note 610 to the financial statements for additional information.
Sources of CapitalRate Recovery
Southern Company intends to meet its future capital needs through operating cash flows, short-term debt, term loans, and external security issuances. Equity capital can be provided from any combination of the Company's stock plans, private placements, or public offerings. The amount and timing of additional equity capital and debt issuances in 2017, as well as in subsequent years, will be contingent on Southern Company's investment opportunities and the Southern Company system's capital requirements and will depend upon prevailing market conditions and other factors. See "Capital Requirements and Contractual Obligations" herein for additional information.
Except as described herein, the traditional electric operating companies, Southern Power, and Southern Company Gas plan to obtain the funds required for construction and other purposes from operating cash flows, external security issuances, term loans, short-term borrowings, and equity contributions or loans from Southern Company. However, the amount, type, and timing of any future financings, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors.
In addition, Georgia Power may make borrowings through a loan guarantee agreement (Loan Guarantee Agreement) between Georgia Power and the DOE, the proceeds of which may be used to reimburse Georgia Power for a portion of certain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under the Loan Guarantee Agreement (Eligible Project Costs). Under the Loan Guarantee Agreement, the DOE agreed to guarantee borrowings of up to $3.46 billion (not to exceed 70% of Eligible Project Costs) to be made by Georgia Power under a multi-advance credit facility (FFB Credit Facility) among Georgia Power, the DOE, and the FFB. Eligible Project Costs incurred through December 31, 2016 would allow for borrowings of up to $2.7 billion under the FFB Credit Facility, of which Georgia Power has borrowed $2.6 billion. See Note 6 to the financial statements under "DOE Loan Guarantee Borrowings" for additional information regarding the Loan Guarantee Agreement and Note 3 to the financial statements under "Regulatory MattersGeorgia PowerNuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
Mississippi Power received $245 million of Initial DOE Grants in prior years that were used for the construction of the Kemper IGCC. An additional $25 million of grants from the DOE is expected to be received for commercial operation of the Kemper IGCC. On April 8, 2016, Mississippi Power received approximately $137 million in Additional DOE Grants for the Kemper IGCC, which are expected to be used to reduce future rate impacts for customers. See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for information regarding legislation related to the securitization of certain costs of the Kemper IGCC.
The issuance of securities by the traditional electric operating companies and Nicor Gas is generally subject to the approval of the applicable state PSC or other applicable state regulatory agency. The issuance of all securities by Mississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Southern Company and certain of its subsidiaries file registration statements with the SEC under the Securities Act of 1933, as amended (1933 Act). The amounts of securities authorized by the appropriate regulatory authorities, as well as the securities registered under the 1933 Act, are continuously monitored and appropriate filings are made to ensure flexibility in the capital markets.
Southern Company, each traditional electric operating company, and Southern Power generally obtain financing separately without credit support from any affiliate. In addition, Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of each company are not commingled with funds of any other company in the Southern Company system.
As of December 31, 2016, Southern Company's current liabilities exceeded current assets by $3.2 billion, primarily due to $2.6 billion of long-term debt that is due within one year, including approximately $0.8 billion at the parent company, $0.6 billion at Alabama Power, $0.5 billion at Georgia Power, $0.1 billion at Gulf Power, and $0.6 billion at Southern Power. To meet short-term cash needs and contingencies, the Southern Company system has substantial cash flow from operating activities and access to capital markets and financial institutions. Southern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas intend to utilize operating cash flows, as well as commercial paper, lines of credit, bank notes, and securities issuances, as market conditions permit, as well as, under certain circumstances for the traditional electric operating companies, Southern Power, and Southern Company Gas, equity contributions and/or loans from Southern Company to meet their short-term capital needs. In addition, Georgia Power expects to utilize borrowings through the FFB Credit Facility as an additional source of long-term borrowed funds.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


At December 31, 2016, Southern Company and its subsidiaries had approximately $2.0 billion of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2016 were as follows:
 Expires   Executable Term Loans Expires Within One Year
Company2017
2018
2020 Total Unused 
One
Year
 
Two
Years
 Term Out No Term Out
 (in millions) (in millions) (in millions) (in millions)
Southern Company(a)
$
 $1,000
 $1,250
 $2,250
 $2,250
 $
 $
 $
 $
Alabama Power35
 500
 800
 1,335
 1,335
 
 
 
 35
Georgia Power
 
 1,750
 1,750
 1,732
 
 
 
 
Gulf Power85
 195
 
 280
 280
 45
 
 25
 60
Mississippi Power173
 
 
 173
 150
 
 13
 13
 160
Southern Power Company(b)

 
 600
 600
 522
 
 
 
 
Southern Company Gas(c)
75
 1,925
 
 2,000
 1,949
 
 
 
 75
Other55
 
 
 55
 55
 20
 
 20
 35
Southern Company Consolidated$423
 $3,620
 $4,400
 $8,443
 $8,273
 $65
 $13
 $58
 $365
(a)Represents the Southern Company parent entity.
(b)
Excludes credit agreements (Project Credit Facilities) assumed with the acquisition of certain solar facilities, which were non-recourse to Southern Power Company, the proceeds of which were used to finance project costs related to such solar facilities. See Note 12 to the financial statements under "Southern Power" for additional information. Also excludes a $120 million continuing letter of credit facility entered into by Southern Power in December 2016 for standby letters of credit expiring in 2019. At December 31, 2016, the total amount available under the letter of credit facility was $82 million.
(c)Southern Company Gas, as the parent entity, guarantees the obligations of Southern Company Gas Capital, which is the borrower of $1.3 billion of these arrangements. Southern Company Gas' committed credit arrangements also include $700 million for which Nicor Gas is the borrower and which is restricted for working capital needs of Nicor Gas.
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
Most of these bank credit arrangements, as well as the term loan arrangements of Southern Company, Alabama Power, Gulf Power, Mississippi Power, and Southern Power Company, contain covenants that limit debt levels and contain cross acceleration or cross default provisions to other indebtedness (including guarantee obligations) that are restricted only to the indebtedness of the individual company. Such cross default provisions to other indebtedness would trigger an event of default if the applicable borrower defaulted on indebtedness or guarantee obligations over a specified threshold. Such cross acceleration provisions to other indebtedness would trigger an event of default if the applicable borrower defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2016, Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas were in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
Subject to applicable market conditions, Southern Company and its subsidiaries expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, Southern Company and its subsidiaries may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
A portion of the unused credit with banks is allocated to provide liquidity support to the pollution control revenue bonds of the traditional electric operating companies and the commercial paper programs of Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas. The amount of variable rate pollution control revenue bonds of the traditional electric operating companies outstanding requiring liquidity support as of December 31, 2016 was approximately $1.9 billion. In addition, at December 31, 2016, the traditional electric operating companies had approximately $423 million of fixed rate pollution control revenue bonds outstanding that were required to be remarketed within the next 12 months.
Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Short-term borrowings are included in notes payable in the balance sheets.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


Details of short-term borrowings were as follows:
 Short-term Debt at the End of the Period 
Short-term Debt During the Period (*)
 Amount Outstanding Weighted Average Interest Rate Average Amount Outstanding Weighted Average Interest Rate Maximum Amount Outstanding
 (in millions)   (in millions)   (in millions)
December 31, 2016:         
Commercial paper$1,909
 1.1% $976
 0.8% $1,970
Short-term bank debt123
 1.7% 176
 1.7% 500
Total$2,032
 1.1% $1,152
 1.1%  
December 31, 2015:         
Commercial paper$740
 0.7% $842
 0.4% $1,563
Short-term bank debt500
 1.4% 444
 1.1% 795
Total$1,240
 0.9% $1,286
 0.5%  
December 31, 2014:         
Commercial paper$803
 0.3% $754
 0.2% $1,582
Short-term bank debt
 % 98
 0.8% 400
Total$803
 0.3% $852
 0.3%  
(*)Average and maximum amounts are based upon daily balances during the twelve-month periods ended December 31, 2016, 2015, and 2014.
In addition to the short-term borrowings in the table above, Southern Power's subsidiary Project Credit Facilities had total amounts outstanding as of December 31, 2016 of $209 million at a weighted average interest rate of 2.1%. For the year ended December 31, 2016, the Project Credit Facilities had a maximum amount outstanding of $828 million and an average amount outstanding of $566 million at a weighted average interest rate of 2.1%. The amounts outstanding as of December 31, 2016 under the Project Credit Facilities were fully repaid subsequent to December 31, 2016.
Furthermore, in connection with the acquisition of a solar facility on July 1, 2016, a subsidiary of Southern Power assumed a $217 million construction loan, which was fully repaid in September 2016. During this period, the credit agreement had a maximum amount outstanding of $217 million and an average amount outstanding of $137 million at a weighted average interest rate of 2.2%.
The Company believes the need for working capital can be adequately met by utilizing commercial paper programs, lines of credit, bank term loans, and operating cash flows.
Financing Activities
In May and August 2016, Southern Company issued an aggregate of 50.8 million shares of common stock in underwritten offerings for an aggregate purchase price of approximately $2.5 billion. Of the 50.8 million shares, approximately 2.6 million were issued from treasury and the remainder were newly issued shares. The proceeds were used to fund a portion of the consideration for the Merger and related transaction costs, to fund a portion of the purchase price for the SNG investment and related transaction costs, and for other general corporate purposes.
During the fourth quarter 2016, Southern Company issued approximately 8.0 million shares of common stock through at-the-market issuances pursuant to sales agency agreements related to Southern Company's continuous equity offering program and received cash proceeds of approximately $381 million, net of $3 million in fees and commissions.
In addition, during 2016, Southern Company issued approximately 20 million shares of common stock primarily through employee equity compensation plans and received proceeds of approximately $874 million.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


The following table outlines the long-term debt financing activities for Southern Company and its subsidiaries for the year ended December 31, 2016:
Company
Senior
Note
Issuances
 
Senior
Note
Maturities
and
Redemptions
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities(a)
 (in millions)
Southern Company(b)
$8,500
 $500
 $
 $1,350
 $
Alabama Power400
 200
 
 45
 
Georgia Power650
 700
 4
 425
 10
Gulf Power
 235
 
 2
 
Mississippi Power
 300
 
 1,400
 653
Southern Power2,831
 200
 
 65
 86
Southern Company Gas(c)
900
 420
 
 
 
Other
 
 
 79
 65
Elimination(d)

 
 
 (279) (228)
Southern Company Consolidated$13,281
 $2,555
 $4
 $3,087
 $586
(a)Includes reductions in capital lease obligations resulting from cash payments under capital leases.
(b)Represents the Southern Company parent entity.
(c)Reflects only long-term debt financing activities occurring subsequent to completion of the Merger. The senior notes were issued by Southern Company Gas Capital and guaranteed by Southern Company Gas, as the parent entity.
(d)Includes intercompany loans from Southern Company to Mississippi Power and PowerSecure, as well as reductions in affiliate capital lease obligations at Georgia Power. These transactions are eliminated in Southern Company's Consolidated Financial Statements.
In February 2016, Southern Company entered into $700 million notional amount of forward-starting interest rate swaps2018, the Mississippi PSC voted to hedge exposure to interest rate changes related to anticipated debt issuances. These interest rate swaps were settled in May 2016.
In May 2016, Southern Company issued the following series of senior notes for an aggregate principal amount of $8.5 billion:
$0.5 billion of 1.55% Senior Notes due July 1, 2018;
$1.0 billion of 1.85% Senior Notes due July 1, 2019;
$1.5 billion of 2.35% Senior Notes due July 1, 2021;
$1.25 billion of 2.95% Senior Notes due July 1, 2023;
$1.75 billion of 3.25% Senior Notes due July 1, 2026;
$0.5 billion of 4.25% Senior Notes due July 1, 2036; and
$2.0 billion of 4.40% Senior Notes due July 1, 2046.
The net proceeds were used to fundapprove a portion of the consideration for the Merger and related transaction costs and for other general corporate purposes.
In September 2016, Southern Company issued $800 million aggregate principal amount of Series 2016A 5.25% Junior Subordinated Notes due October 1, 2076. The proceeds were used to repay short-term indebtedness that was incurred to repay at maturity $500 million aggregate principal amount of Southern Company's Series 2011A 1.95% Senior Notes due September 1, 2016 and for other general corporate purposes.
In December 2016, Southern Company issued $550 million aggregate principal amount of Series 2016B Junior Subordinated Notes due March 15, 2057, which bear interest at a fixed rate of 5.50% per year up to, but not including, March 15, 2022. From, and including, March 15, 2022, the Series 2016B Junior Subordinated Notes will bear interest at a floating rate based on three-month LIBOR. The proceeds were used for general corporate purposes.
Except as described herein, Southern Company's subsidiaries used the proceeds of the debt issuances shown in the table above for their redemptions and maturities shown in the table above, to repay short-term indebtedness, and for general corporate purposes,
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


including their continuous construction programs and, for Southern Power, its growth strategy. In addition, certain of Georgia Power's and Southern Power's issuances were allocated to eligible renewable energy expenditures.
Georgia Power's "Other Long-Term Debt Issuances" reflected in the table above include borrowings in June and December 2016 under the FFB Credit Facility in an aggregate principal amount of $300 million and $125 million, respectively. The interest rate applicable to the $300 million principal amount is 2.571% and the interest rate applicable to the $125 million principal amount is 3.142%, both for interest periods that extend to the final maturity date of February 20, 2044. The proceeds were used to reimburse Georgia Power for Eligible Project Costs relating to the construction of Plant Vogtle Units 3 and 4.
In June 2016, Southern Power Company issued €600 million aggregate principal amount of Series 2016A 1.00% Senior Notes due June 20, 2022 and €500 million aggregate principal amount of Series 2016B 1.85% Senior Notes due June 20, 2026. The net proceeds are being allocated to renewable energy generation projects. Southern Power Company's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. See Note 11 to the financial statements under "Foreign Currency Derivatives" for additional information.
In September 2016, Southern Company Gas Capital issued $350 million aggregate principal amount of 2.45% Senior Notes due October 1, 2023 and $550 million aggregate principal amount of 3.95% Senior Notes due October 1, 2046, both of which are guaranteed by Southern Company Gas. The proceeds were primarily used to repay a $360 million promissory note issued to Southern Company for the purpose of funding a portion of the purchase price for a 50% equity interest in SNG, to fund the purchase of Piedmont Natural Gas Company, Inc.'s interest in SouthStar Energy Services, LLC, to make a voluntary contribution to Southern Company Gas' pension plan, and for general corporate purposes. See Note 12 to the financial statements under "Southern CompanyInvestment in Southern Natural Gas" and " – Acquisition of Remaining Interest in SouthStar" for additional information.
Subsequent to December 31, 2016, Alabama Power repaid at maturity $200 million aggregate principal amount of its Series 2007A 5.55% Senior Notes due February 1, 2017.
In March 2016, Alabama Power entered into three bank term loan agreements with maturity dates of March 2021, in an aggregate principal amount of $45 million, one of which bears interest at 2.38% per annum and two of which bear interest based on three-month LIBOR.
In March 2016, Mississippi Power entered into an unsecured term loansettlement agreement with a syndicate of financial institutions for an aggregate amount of $1.2 billion. Mississippi Power borrowed $900 million in March 2016 under the term loan agreement and the remaining $300 million in October 2016. Mississippi Power used the initial proceeds to repay $900 million in maturing bank loans in March 2016 and the remaining $300 million to repay at maturity Mississippi Power's Series 2011A 2.35% Senior Notes due October 15, 2016. This loan matures on April 1, 2018 and bears interest based on one-month LIBOR.
In May 2016, Gulf Power entered into an 11-month floating rate bank loan bearing interest based on one-month LIBOR. This short-term loan was for $100 million aggregate principal amount and the proceeds were used to repay existing indebtedness and for working capital and other general corporate purposes.
In September 2016, Southern Power Company repaid $80 million of an outstanding $400 million floating rate bank loan and extended the maturity date of the remaining $320 million from September 2016 to September 2018. In addition, Southern Power Company entered into a $60 million aggregate principal amount floating rate bank loan bearing interest based on one-month LIBOR due September 2017. The proceeds were used to repay existing indebtedness and for other general corporate purposes.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, Southern Company and its subsidiaries plan to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
At December 31, 2016, Southern Company and its subsidiaries did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change of certain subsidiaries to BBB and/or Baa2 or below. These contracts are for physical electricity and natural gas purchases and sales, fuel purchases, fuel transportation and storage, energy price risk management, transmission, interest rate management, foreign currency risk management, and construction of new generation at Plant Vogtle Units 3 and 4.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


The maximum potential collateral requirements under these contracts at December 31, 2016 were as follows:
Credit Ratings
Maximum
Potential
Collateral
Requirements
 (in millions)
At BBB and/or Baa2$39
At BBB- and/or Baa3$691
At BB+ and/or Ba1(*)
$2,723
(*)Any additional credit rating downgrades at or below BB- and/or Ba3 could increase collateral requirements up to an additional $91 million.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of Southern Company and its subsidiaries to access capital markets and would be likely to impact the cost at which they do so.
On May 12, 2016, Fitch Ratings, Inc. (Fitch) downgraded the senior unsecured long-term debt rating of Southern Company to A- from A and revised the ratings outlook from negative to stable. Fitch also downgraded the senior unsecured long-term debt rating of Mississippi Power to BBB+ from A- and revised the ratings outlook from negative to stable.
On May 13, 2016, Moody's downgraded the senior unsecured long-term debt rating of Southern Company to Baa2 from Baa1 and revised the ratings outlook from negative to stable.
On July 11, 2016, S&P raised Southern Company Gas' and Nicor Gas' corporate and senior unsecured long-term debt ratings from BBB+ to A- and revised their ratings outlooks from positive to negative.
On January 10, 2017, S&P revised its consolidated credit rating outlook for Southern Company (including the traditional electric operating companies, Southern Power, and Southern Company Gas) from negative to stable.
On February 6, 2017, Moody's placed Mississippi Power on a ratings review for potential downgrade. Mississippi Power's current rating for unsecured debt is Baa3.
Market Price Risk
The Southern Company system is exposed to market risks, including commodity price risk, interest rate risk, weather risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the applicable company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the applicable company's policies in areas such as counterparty exposure and risk management practices. The Southern Company system's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to a change in interest rates, Southern Company and certain of its subsidiaries enter into derivatives that have been designated as hedges. Derivatives that have been designated as hedges outstanding at December 31, 2016 have a notional amount of $4.0 billion, of which $0.1 billion are to mitigate interest rate volatility related to projected debt financings in 2017. The remaining $3.9 billion are related to existing fixed and floating rate obligations. The weighted average interest rate on $6.4 billion of long-term variable interest rate exposure at January 1, 2017 was 1.68%. If Southern Company sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $63 million at January 1, 2017. See Note 1 to the financial statements under "Financial Instruments" and Note 11 to the financial statements for additional information.
Due to cost-based rate regulation and other various cost recovery mechanisms, the traditional electric operating companies and natural gas distribution utilities continue to have limited exposure to market volatility in interest rates, foreign currency exchange rates, commodity fuel prices, and prices of electricity. In addition, Southern Power's exposure to market volatility in commodity fuel prices and prices of electricity is limited because its long-term sales contracts shift substantially all fuel cost responsibility to the purchaser. However, Southern Power has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity. To mitigate residual risks relative to movements in electricity prices, the traditional electric operating companies and Southern Power may enter into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases; however, a significant portion of contracts are priced at market. The traditional electric operating companies and certain of the natural gas distribution utilities manage fuel-hedging programs implemented per the guidelines of
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


their respective state PSCs or other applicable state regulatory agencies. Southern Company had no material change in market risk exposure for the year ended December 31, 2016 when compared to the year ended December 31, 2015.
The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2016
Changes
 
2015
Changes
 Fair Value
 (in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net$(213) $(188)
Acquisitions(54) 
Contracts realized or settled141
 142
Current period changes(*)
171
 (167)
Contracts outstanding at the end of the period, assets (liabilities), net$45
 $(213)
(*)Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts were 500 million mmBtu and 224 million mmBtu for the years ended December 31, 2016 and 2015, respectively.
For the traditional electric operating companies and Southern Power, the weighted average swap contract cost above or (below) market prices was approximately $(0.05) per mmBtu as of December 31, 2016 and $1.14 per mmBtu as of December 31, 2015. The majority of the natural gas hedge gains and losses are recovered through the traditional electric operating companies' fuel cost recovery clauses.
At December 31, 2016 and 2015, substantially all of the Southern Company system's energy-related derivative contracts were designated as regulatory hedges and were related to the applicable company's fuel-hedging program. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the energy cost recovery clause. Certain other gains and losses on energy-related derivatives, designated as cash flow hedges, are initially deferred in OCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred and were not material for any year presented.
The Southern Company system uses exchange-traded market-observable contracts, which are categorized as Level 1 of the fair value hierarchy, and over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 10 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts at December 31, 2016 were as follows:
 Fair Value Measurements
 December 31, 2016
 
Total
Fair Value
 Maturity
  Year 1 Years 2&3 Years 4&5
 (in millions)
Level 1$(7) $15
 $(15) $(7)
Level 252
 52
 (7) 7
Level 3
 
 
 
Fair value of contracts outstanding at end of period$45
 $67
 $(22) $
The Southern Company system is exposed to market price risk in the event of nonperformance by counterparties to energy-related and interest rate derivative contracts. The Southern Company system only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Southern Company system does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 11 to the financial statements.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


Southern Company performs periodic reviews of its leveraged lease transactions, both domestic and international, and the creditworthiness of the lessees, including a review of the value of the underlying leased assets and the credit ratings of the lessees. Southern Company's domestic lease transactions generally do not have any credit enhancement mechanisms; however, the lessees in its international lease transactions have pledged various deposits as additional security to secure the obligations. The lessees in the Company's international lease transactions are also required to provide additional collateral in the event of a credit downgrade below a certain level.
Capital Requirements and Contractual Obligations
The Southern Company system's construction program is currently estimated to total approximately $9.1 billion for 2017, $8.2 billion for 2018, $7.3 billion for 2019, $6.9 billion for 2020, and $6.4 billion for 2021. These amounts include expenditures of approximately $0.7 billion, $0.5 billion, $0.3 billion, and $0.1 billion for the construction of Plant Vogtle Units 3 and 4 in 2017, 2018, 2019, and 2020, respectively, $0.3 billion for the construction of the Kemper IGCC in 2017, and $1.5 billion per year for 2017 through 2021 for acquisitions and/or construction of new Southern Power generating facilities. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel and capital expenditures covered under long-term service agreements. Estimated capital expenditures to comply with environmental statutes and regulations included in these amounts are $0.9 billion, $0.7 billion, $0.3 billion, $0.4 billion, and $0.6 billion for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include potential compliance costs that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental MattersEnvironmental Statutes and Regulations" and "– Global Climate Issues" herein for additional information.
The traditional electric operating companies also anticipate costs associated with closure and monitoring of ash ponds in accordance with the CCR Rule, which are reflected in the Company's ARO liabilities. These costs, which could change as the Southern Company system continues to refine its assumptions underlying the cost estimates and evaluate the method and timing of compliance activities, are estimated to be approximately $0.4 billion, $0.3 billion, $0.3 billion, $0.4 billion, and $0.4 billion for 2017, 2018, 2019, 2020, and 2021, respectively. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental statutes and regulations; the outcome of any legal challenges to the environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. Additionally, planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy. See Note 12 to the financial statements under "Southern Power" for additional information regarding Southern Power's plant acquisitions.
In addition, the construction program includes the development and construction of new electric generating facilities with designs that have not been finalized or previously constructed, including first-of-a-kind technology, which may result in revised estimates during construction. See Note 3 to the financial statements under "Regulatory MattersGeorgia PowerNuclear Construction" and "Integrated Coal Gasification Combined Cycle" for information regarding additional factors that may impact construction expenditures.
As a result of NRC requirements, Alabama Power and Georgia Power have external trust funds for nuclear decommissioning costs; however, Alabama Power currently has no additional funding requirements. For additional information, see Note 1 to the financial statements under "Nuclear Decommissioning."
In addition, as discussed in Note 2 to the financial statements, Southern Company provides postretirement benefits to the majority of its employees and funds trusts to the extent required by PSCs, other applicable state regulatory agencies, or the FERC.
Other funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, preferred and preference stock dividends, leases, unrecognized tax benefits, pipeline charges, storage capacity, gas supply, asset management agreements, standby letters of credit and performance/surety bonds, other purchase commitments, and trusts are detailed in the contractual obligations table that follows. See Notes 1, 2, 5, 6, 7, and 11 to the financial statements for additional information.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


Contractual Obligations
The Southern Company system's contractual obligations at December 31, 2016 were as follows:
 2017 
2018-
2019
 
2020-
2021
 
After
2021
 Total
 (in millions)
Long-term debt(a) —
         
Principal$2,556
 $7,025
 $4,448
 $30,890
 $44,919
Interest1,635
 3,034
 2,592
 24,055
 31,316
Preferred and preference stock dividends(b)
45
 91
 91
 
 227
Financial derivative obligations(c)
516
 101
 12
 1
 630
Operating leases(d)
152
 247
 190
 1,195
 1,784
Capital leases(d)
16
 32
 22
 79
 149
Unrecognized tax benefits(e)
484
 
 
 
 484
Pipeline charges, storage capacity, and gas supply(f)
822
 1,049
 746
 2,591
 5,208
Asset management agreements(g)
10
 7
 
 
 17
Standby letters of credit, performance/surety bonds(h)
85
 1
 
 
 86
Purchase commitments 
        

Capital(i)
8,797
 14,649
 12,055
 
 35,501
Fuel(j)
3,763
 4,379
 2,248
 7,095
 17,485
Purchased power(k)
362
 753
 782
 2,651
 4,548
Other(l)
479
 560
 777
 3,024
 4,840
Trusts —        

Nuclear decommissioning(m)
5
 11
 11
 99
 126
Pension and other postretirement benefit plans(n)
146
 293
 
 
 439
Total$19,873
 $32,232
 $23,974
 $71,680
 $147,759
(a)
All amounts are reflected based on final maturity dates except for amounts related to FFB borrowings. As it relates to the FFB borrowings, the final maturity date is February 20, 2044; however, principal amortization is reflected beginning in 2020. See Note 6 to the financial statements under "DOE Loan Guarantee Borrowings" for additional information. Southern Company and its subsidiaries plan to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates as of January 1, 2017, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. Long-term debt principal for 2017 includes $40 million of pollution control revenue bonds that are classified on the balance sheet at December 31, 2016 as short-term since they are variable rate demand obligations that are supported by short-term credit facilities; however, the final maturity date is in 2028. Long-term debt excludes capital lease amounts (shown separately).
(b)Represents preferred and preference stock of subsidiaries. Preferred and preference stock do not mature; therefore, amounts are provided for the next five years only.
(c)Includes derivative liabilities related to cash flow hedges of forecasted debt, as well as energy-related derivatives. For additional information, see Notes 1 and 11 to the financial statements.
(d)Excludes PPAs that are accounted for as leases and included in "Purchased power."
(e)
See Note 5 to the financial statements under "Unrecognized Tax Benefits" for additional information.
(f)Includes charges recoverable through a natural gas cost recovery mechanism, or alternatively billed to marketers selling retail natural gas, and demand charges associated with Southern Company Gas' wholesale gas services. The gas supply balance includes amounts for gas commodity purchase commitments associated with Southern Company Gas' gas marketing services of 33 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2016 and valued at $106 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries in support of payment obligations.
(g)Represents fixed-fee minimum payments for asset management agreements associated with wholesale gas services.
(h)Guarantees are provided to certain municipalities and other agencies and certain natural gas suppliers in support of payment obligations.
(i)
The Southern Company system provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel and capital expenditures covered under long-term service agreements which are reflected in "Fuel" and "Other," respectively. At December 31, 2016, significant purchase commitments were outstanding in connection with the construction program. See FUTURE EARNINGS POTENTIAL – "Environmental MattersEnvironmental Statutes and Regulations" herein for additional information.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


(j)Primarily includes commitments to purchase coal, nuclear fuel, and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the New York Mercantile Exchange future prices at December 31, 2016.
(k)
Estimated minimum long-term obligations for various PPA purchases from gas-fired, biomass, and wind-powered facilities. Includes a total of $292 million of biomass PPAs that is contingent upon the counterparties meeting specified contract dates for commercial operation. Subsequent to December 31, 2016, the specified contract dates for commercial operation were extended from 2017 to 2019 and may change further as a result of regulatory action. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersRenewables" herein for additional information.
(l)Includes long-term service agreements, contracts for the procurement of limestone, contractual environmental remediation liabilities, and operation and maintenance agreements. Long-term service agreements include price escalation based on inflation indices.
(m)
Projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2013 ARP for Georgia Power. Alabama Power also has external trust funds for nuclear decommissioning costs; however, Alabama Power currently has no additional funding requirements. See Note 1 to the financial statements under "Nuclear Decommissioning" for additional information.
(n)The Southern Company system forecasts contributions to the pension and other postretirement benefit plans over a three-year period. Southern Company anticipates no mandatory contributions to the qualified pension plans during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from corporate assets of Southern Company's subsidiaries. See Note 2 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from corporate assets of Southern Company's subsidiaries.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


Cautionary Statement Regarding Forward-Looking Statements
Southern Company's 2016 Annual Report contains forward-looking statements. Forward-looking statements include, among other things, statements concerning regulated rates, the strategic goals for the wholesale business, customer and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plans, postretirement benefit plans, and nuclear decommissioning trust fund contributions, financing activities, completion dates of construction projects, filings with state and federal regulatory authorities, impact of the PATH Act, federal income tax benefits, estimated sales and purchases under power sale and purchase agreements, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impact of recent and future federal and state regulatory changes, including environmental laws regulating emissions, discharges, and disposal to air, water, and land, and also changes in tax and other laws and regulations to which Southern Company and its subsidiaries are subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
the effects, extent, and timing of the entry of additional competition in the markets in which Southern Company's subsidiaries operate;
variations in demand for electricity and natural gas, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources such as self-generation and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of natural gas and other fuels;
limits on pipeline capacity;
effects of inflation;
the ability to control costs and avoid cost overruns during the development, construction, and operation of facilities, which include the development and construction of generating facilities with designs that have not been finalized or previously constructed, including changes in labor costs and productivity, adverse weather conditions, shortages and inconsistent quality of equipment, materials, and labor, sustaining nitrogen supply, contractor or supplier delay, non-performance under construction, operating, or other agreements, operational readiness, including specialized operator training and required site safety programs, unforeseen engineering or design problems, start-up activities (including major equipment failure and system integration), and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by any PSC);
the ability to construct facilities in accordance with the requirements of permits and licenses, to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completion of construction;
investment performance of the Southern Company system's employee and retiree benefit plans and nuclear decommissioning trust funds;
advances in technology;
ongoing renewable energy partnerships and development agreements;
state and federal rate regulations and the impact of pending and future rate cases and negotiations, including rate actions relating to fuel and other cost recovery mechanisms;
legal proceedings and regulatory approvals and actions related to Plant Vogtle Units 3 and 4, including Georgia PSC approvals and NRC actions;
actions related to cost recovery for the Kemper IGCC, includingCounty energy facility among Mississippi Power, the ultimate impact ofMPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the 2015 decision of the Mississippi Supreme Court, the Mississippi PSC's December 2015 rate order, and related legal or regulatory proceedings, Mississippi PSC review of the prudence of Kemper IGCC costs and approval of further permanent rate recovery plans, actions relatingCPCN to proposed securitization, satisfaction of requirements to utilize grants, and the ultimate impact of the termination of the proposed sale of an interest inlimit the Kemper IGCCCounty energy facility to SMEPA;
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2016 Annual Report


the ability to successfully operate the electric utilities' generating, transmission, and distribution facilities and Southern Company Gas' natural gas distributioncombined cycle operation, and storage facilities and the successful performanceprovided for an annual revenue requirement of necessary corporate functions;
the inherent risks involved in operating and constructing nuclear generating facilities, including environmental, health, regulatory, natural disaster, terrorism, and financial risks;
the inherent risks involved in transporting and storing natural gas;
the performance of projects undertaken by the non-utility businesses and the success of efforts to invest in and develop new opportunities;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to Southern Company or its subsidiaries;
the possibility that the anticipated benefits from the Merger cannot be fully realized or may take longer to realize than expected, the possibility thatapproximately $99.3 million for costs related to the integration of Southern Company and Southern Company Gas will be greater than expected, the ability to retain and hire key personnel and maintain relationships with customers, suppliers, or other business partners, and the diversion of management time on integration-related issues;
the ability of counterparties of Southern Company and its subsidiaries to make payments as and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Southern Company system's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;
changes in Southern Company's and any of its subsidiaries' credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general, as well as potential impacts on the benefits of the DOE loan guarantees;
the ability of Southern Company's electric utilities to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;
the direct or indirect effects on the Southern Company system's business resulting from incidents affecting the U.S. electric grid, natural gas pipeline infrastructure, or operation of generating or storage resources;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (including the Form 10-K) filed by Southern Company from time to time with the SEC.
Southern Company expressly disclaims any obligation to update any forward-looking statements.

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CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Southern Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Revenues:     
Retail electric revenues$15,234
 $14,987
 $15,550
Wholesale electric revenues1,926
 1,798
 2,184
Other electric revenues698
 657
 672
Natural gas revenues1,596
 
 
Other revenues442
 47
 61
Total operating revenues19,896
 17,489
 18,467
Operating Expenses:     
Fuel4,361
 4,750
 6,005
Purchased power750
 645
 672
Cost of natural gas613
 
 
Cost of other sales260
 
 
Other operations and maintenance5,240
 4,416
 4,354
Depreciation and amortization2,502
 2,034
 1,945
Taxes other than income taxes1,113
 997
 981
Estimated loss on Kemper IGCC428
 365
 868
Total operating expenses15,267
 13,207
 14,825
Operating Income4,629
 4,282
 3,642
Other Income and (Expense):     
Allowance for equity funds used during construction202
 226
 245
Earnings from equity method investments59
 
 
Interest expense, net of amounts capitalized(1,317) (840) (835)
Other income (expense), net(93) (39) (44)
Total other income and (expense)(1,149) (653) (634)
Earnings Before Income Taxes3,480
 3,629
 3,008
Income taxes951
 1,194
 977
Consolidated Net Income2,529
 2,435
 2,031
Less:     
Dividends on preferred and preference stock of subsidiaries45
 54
 68
Net income attributable to noncontrolling interests36
 14
 
Consolidated Net Income Attributable to Southern Company$2,448
 $2,367
 $1,963
Common Stock Data:     
Earnings per share (EPS) —     
Basic EPS$2.57
 $2.60
 $2.19
Diluted EPS2.55
 2.59
 2.18
Average number of shares of common stock outstanding — (in millions)     
Basic951
 910
 897
Diluted958
 914
 901
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Southern Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Consolidated Net Income$2,529
 $2,435
 $2,031
Other comprehensive income:     
Qualifying hedges:     
Changes in fair value, net of tax of $(84), $(8), and $(6), respectively(136) (13) (10)
Reclassification adjustment for amounts included in net
income, net of tax of $43, $4, and $3, respectively
69
 6
 5
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $10, $(1), and $(32),
respectively
13
 (2) (51)
Reclassification adjustment for amounts included in net income, net of
tax of $3, $4, and $2, respectively
4
 7
 3
Total other comprehensive income (loss)(50) (2) (53)
Less:     
Dividends on preferred and preference stock of subsidiaries45
 54
 68
Comprehensive income attributable to noncontrolling interests36
 14
 
Consolidated Comprehensive Income Attributable to Southern Company$2,398
 $2,365
 $1,910
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2016, 2015, and 2014
Southern Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
   (in millions)
Operating Activities:     
Consolidated net income$2,529
 $2,435
 $2,031
Adjustments to reconcile consolidated net income
to net cash provided from operating activities —
     
Depreciation and amortization, total2,923
 2,395
 2,293
Deferred income taxes(127) 1,404
 709
Collateral deposits(102) 
 
Allowance for equity funds used during construction(202) (226) (245)
Pension, postretirement, and other employee benefits(65) 83
 (9)
Pension and postretirement funding(1,029) (7) (506)
Settlement of asset retirement obligations(171) (37) (17)
Stock based compensation expense121
 99
 63
Hedge settlements(233) (17) 
Estimated loss on Kemper IGCC428
 365
 868
Income taxes receivable, non-current(122) (413) 
Other, net(36) (33) 13
Changes in certain current assets and liabilities —     
-Receivables(544) 243
 (352)
-Fossil fuel for generation178
 61
 408
-Natural gas for sale(226) 
 
-Materials and supplies(31) (44) (67)
-Other current assets(174) (108) (57)
-Accounts payable301
 (353) 267
-Accrued taxes1,456
 352
 (105)
-Accrued compensation36
 (41) 255
-Retail fuel cost over recovery — short-term(231) 289
 (23)
-Mirror CWIP
 (271) 180
-Other current liabilities215
 98
 109
Net cash provided from operating activities4,894
 6,274
 5,815
Investing Activities:     
Business acquisitions, net of cash acquired(10,689) (1,719) (731)
Property additions(7,310) (5,674) (5,246)
Investment in restricted cash(733) (160) (11)
Distribution of restricted cash742
 154
 57
Nuclear decommissioning trust fund purchases(1,160) (1,424) (916)
Nuclear decommissioning trust fund sales1,154
 1,418
 914
Cost of removal, net of salvage(245) (167) (170)
Change in construction payables, net(121) 402
 (107)
Investment in unconsolidated subsidiaries(1,444) 
 
Prepaid long-term service agreement(134) (197) (181)
Other investing activities(108) 87
 (17)
Net cash used for investing activities(20,048) (7,280) (6,408)
Financing Activities:     
Increase (decrease) in notes payable, net1,228
 73
 (676)
Proceeds —     
Long-term debt16,368
 7,029
 3,169
Interest-bearing refundable deposit
 
 125
Common stock3,758
 256
 806
Short-term borrowings
 755
 
Redemptions and repurchases —     
Long-term debt(3,145) (3,604) (816)
Common stock
 (115) (5)
Interest-bearing refundable deposits
 (275) 
Preferred and preference stock
 (412) 
Short-term borrowings(478) (255) 
Distributions to noncontrolling interests(72) (18) (1)
Capital contributions from noncontrolling interests682
 341
 8
Purchase of membership interests from noncontrolling interests(129) 
 
Payment of common stock dividends(2,104) (1,959) (1,866)
Other financing activities(383) (116) (100)
Net cash provided from financing activities15,725
 1,700
 644
Net Change in Cash and Cash Equivalents571
 694
 51
Cash and Cash Equivalents at Beginning of Year1,404
 710
 659
Cash and Cash Equivalents at End of Year$1,975
 $1,404
 $710
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED BALANCE SHEETS
At December 31, 2016 and 2015
Southern Company and Subsidiary Companies 2016 Annual Report
Assets2016
 2015
 (in millions)
Current Assets:   
Cash and cash equivalents$1,975
 $1,404
Receivables —   
Customer accounts receivable1,565
 1,058
Energy marketing receivable623
 
Unbilled revenues706
 397
Under recovered regulatory clause revenues18
 63
Income taxes receivable, current544
 144
Other accounts and notes receivable377
 398
Accumulated provision for uncollectible accounts(43) (13)
Materials and supplies1,462
 1,061
Fossil fuel for generation689
 868
Natural gas for sale631
 
Prepaid expenses364
 495
Other regulatory assets, current581
 580
Other current assets230
 71
Total current assets9,722
 6,526
Property, Plant, and Equipment:   
In service98,416
 75,118
Less accumulated depreciation29,852
 24,253
Plant in service, net of depreciation68,564
 50,865
Other utility plant, net
 233
Nuclear fuel, at amortized cost905
 934
Construction work in progress8,977
 9,082
Total property, plant, and equipment78,446
 61,114
Other Property and Investments:   
Goodwill6,251

2
Equity investments in unconsolidated subsidiaries1,549

6
Other intangible assets, net of amortization of $62 and $12
at December 31, 2016 and December 31, 2015, respectively
970
 317
Nuclear decommissioning trusts, at fair value1,606
 1,512
Leveraged leases774
 755
Miscellaneous property and investments270
 160
Total other property and investments11,420
 2,752
Deferred Charges and Other Assets:   
Deferred charges related to income taxes1,629
 1,560
Unamortized loss on reacquired debt223
 227
Other regulatory assets, deferred6,851
 4,989
Income taxes receivable, non-current11
 413
Other deferred charges and assets1,395
 737
Total deferred charges and other assets10,109
 7,926
Total Assets$109,697
 $78,318
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED BALANCE SHEETS
At December 31, 2016 and 2015
Southern Company and Subsidiary Companies 2016 Annual Report
Liabilities and Stockholders' Equity2016
 2015
 (in millions)
Current Liabilities:   
Securities due within one year$2,587
 $2,674
Notes payable2,241
 1,376
Energy marketing trade payables597
 
Accounts payable2,228
 1,905
Customer deposits558
 404
Accrued taxes —   
Accrued income taxes193
 9
Unrecognized tax benefits385
 10
Other accrued taxes667
 484
Accrued interest518
 249
Accrued compensation915
 777
Asset retirement obligations, current378
 217
Liabilities from risk management activities, net of collateral107
 156
Acquisitions payable489
 
Other regulatory liabilities, current236
 278
Over recovered regulatory clause revenues, current135
 106
Other current liabilities683
 484
Total current liabilities12,917
 9,129
Long-Term Debt (See accompanying statements)
42,629
 24,688
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes14,092
 12,322
Deferred credits related to income taxes219
 187
Accumulated deferred investment tax credits2,228
 1,219
Employee benefit obligations2,299
 2,582
Asset retirement obligations, deferred4,136
 3,542
Unrecognized tax benefits, deferred
 370
Accrued environmental remediation397
 42
Other cost of removal obligations2,748
 1,162
Other regulatory liabilities, deferred258
 254
Other deferred credits and liabilities880
 678
Total deferred credits and other liabilities27,257
 22,358
Total Liabilities82,803
 56,175
Redeemable Preferred Stock of Subsidiaries (See accompanying statements)
118
 118
Redeemable Noncontrolling Interests (See accompanying statements)
164
 43
Total Stockholders' Equity (See accompanying statements)
26,612
 21,982
Total Liabilities and Stockholders' Equity$109,697
 $78,318
Commitments and Contingent Matters (See notes)

 
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2016 and 2015
Southern Company and Subsidiary Companies 2016 Annual Report

   2016
 2015
 2016
 2015
   (in millions)  (percent of total)
Long-Term Debt:         
Long-term debt payable to affiliated trusts —         
Variable rate (3.95% at 1/1/17) due 2042  $206
 $206
    
Long-term senior notes and debt —         
MaturityInterest Rates        
20161.95% to 5.30% 
 1,360
    
20171.30% to 7.20% 2,019
 1,995
    
20181.50% to 5.40% 2,353
 1,697
    
20191.85% to 5.55% 3,076
 1,176
    
20202.38% to 4.75% 1,326
 1,327
    
20212.35% to 9.10% 2,655
 200
    
2022 through 20511.00% to 8.70% 21,797
 10,972
    
Variable rates (0.76% to 3.50% at 1/1/16) due 2016  
 1,278
    
Variable rates (1.82% to 3.75% at 1/1/17) due 2017  461
 400
    
Variable rates (1.88% to 2.24% at 1/1/17) due 2018  1,520
 
    
Variable rates (1.87% to 2.10% at 1/1/17) due 2021  25
 
    
Variable rate (3.75% at 1/1/17) due 2032 to 2036  15
 13
    
Total long-term senior notes and debt  35,247
 20,418
    
Other long-term debt —         
Pollution control revenue bonds —         
MaturityInterest Rates        
20194.55% 25
 25
    
2022 through 20490.65% to 5.15% 1,429
 1,509
    
Variable rate (0.22% at 1/1/16) due 2016  
 4
    
Variable rates (0.77% to 0.87% at 1/1/17) due 2017  76
 76
    
Variable rates (0.82% to 0.86% at 1/1/17) due 2021  65
 65
    
Variable rates (0.75% to 0.87% at 1/1/17) due 2022 to 2053  1,739
 1,659
    
Plant Daniel revenue bonds (7.13%) due 2021  270
 270
    
FFB loans —         
2.57% to 3.86% due 2020  44
 37
    
2.57% to 3.86% due 2021  44
 37
    
2.57% to 3.86% due 2022 to 2044  2,537
 2,126
    
First mortgage bonds —         
4.70% due 2019  50
 
    
2.66% to 6.58% due 2023 to 2038  575
 
    
Gas facility revenue bonds —         
Variable rate (1.28% at 1/1/17) due 2022 to 2033  200
 
    
Junior subordinated notes (5.25% to 6.25%) due 2057 to 2076  2,350
 1,000
    
Total other long-term debt  9,404
 6,808
    
Unamortized fair value adjustment of long-term debt  578
 
    
Capitalized lease obligations  136
 146
    
Unamortized debt premium  52
 61
    
Unamortized debt discount  (194) (36)    
Unamortized debt issuance expense  (213) (241)    
Total long-term debt (annual interest requirement — $1.6 billion) 45,216
 27,362
    
Less amount due within one year  2,587
 2,674
    
Long-term debt excluding amount due within one year  42,629
 24,688
 61.3% 52.6%
          
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF CAPITALIZATION (continued)
At December 31, 2016 and 2015
Southern Company and Subsidiary Companies 2016 Annual Report
        
   2016
 2015
 2016
 2015
   (in millions)  (percent of total)
Redeemable Preferred Stock of Subsidiaries:         
Cumulative preferred stock         
$100 par or stated value — 4.20% to 5.44%         
Authorized — 20 million shares         
Outstanding — 1 million shares  81
 81
    
$1 par value — 5.83%         
Authorized — 28 million shares         
Outstanding — 2 million shares: $25 stated value  37
 37
    
Total redeemable preferred stock of subsidiaries
(annual dividend requirement — $6 million)
  118
 118
 0.2
 0.3
Redeemable Noncontrolling Interests  164
 43
 0.2
 0.1
Common Stockholders' Equity:         
Common stock, par value $5 per share —  4,952
 4,572
    
Authorized — 1.5 billion shares         
Issued — 2016: 991 million shares         
  — 2015: 915 million shares         
Treasury — 2016: 0.8 million shares         
      — 2015: 3.4 million shares         
Paid-in capital  9,661
 6,282
    
Treasury, at cost  (31) (142)    
Retained earnings  10,356
 10,010
    
Accumulated other comprehensive loss  (180) (130)    
Total common stockholders' equity  24,758
 20,592
 35.6
 44.0
Preferred and Preference Stock of Subsidiaries
   and Noncontrolling Interests:
         
Non-cumulative preferred stock         
$25 par value — 6.00% to 6.13%         
Authorized — 60 million shares         
Outstanding — 2 million shares  45
 45
    
Preference stock         
Authorized — 65 million shares         
Outstanding — $1 par value  196
 196
    
— 6.45% to 6.50% — 8 million shares (non-cumulative)         
Outstanding — $100 par or stated value  368
 368
    
— 5.60% to 6.50% — 4 million shares (non-cumulative)         
Noncontrolling interests  1,245
 781
    
Total preferred and preference stock of subsidiaries and noncontrolling
interests (annual dividend requirement — $39 million)
  1,854
 1,390
 2.7
 3.0
Total stockholders' equity  26,612
 21,982
    
Total Capitalization  $69,523
 $46,831
 100.0% 100.0%

The accompanying notes are an integral part of these consolidated financial statements. 
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2016, 2015, and 2014
Southern Company and Subsidiary Companies 2016 Annual Report
 Southern Company Common Stockholders' Equity     
 Number of Common Shares Common Stock   
Accumulated
Other
Comprehensive Income
(Loss)
 
Preferred
and Preference Stock of Subsidiaries
 
Noncontrolling
Interests
 
 Issued Treasury Par Value Paid-In Capital Treasury Retained Earnings   Total
 (in thousands) (in millions)
Balance at December 31, 2013892,733
 (5,647) $4,461
 $5,362
 $(250) $9,510
 $(75) $756
 $
$19,764
Consolidated net income attributable
   to Southern Company

 
 
 
 
 1,963
 
 
 
1,963
Other comprehensive income (loss)
 
 
 
 
 
 (53) 
 
(53)
Stock issued15,769
 4,996
 78
 501
 227
 
 
 
 
806
Stock-based compensation
 
 
 86
 
 
 
 
 
86
Cash dividends of $2.0825 per share
 
 
 
 
 (1,866) 
 
 
(1,866)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 221
221
Net loss attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 (2)(2)
Other
 (74) 
 6
 (3) 2
 
 
 2
7
Balance at December 31, 2014908,502
 (725) 4,539
 5,955
 (26) 9,609
 (128) 756
 221
20,926
Consolidated net income attributable
   to Southern Company

 
 
 
 
 2,367
 
 
 
2,367
Other comprehensive income (loss)
 
 
 
 
 
 (2) 
 
(2)
Stock issued6,571
 (2,599) 33
 223
 
 
 
 
 
256
Stock-based compensation
 
 
 100
 
 
 
 
 
100
Stock repurchased, at cost
 
 
 
 (115) 
 
 
 
(115)
Cash dividends of $2.1525 per share
 
 
 
 
 (1,959) 
 
 
(1,959)
Preference stock redemptions
 
 
 
 
 
 
 (150) 
(150)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 567
567
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (18)(18)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 12
12
Other
 (28) 
 4
 (1) (7) 
 3
 (1)(2)
Balance at December 31, 2015915,073
 (3,352) 4,572
 6,282
 (142) 10,010
 (130) 609
 781
21,982
Consolidated net income attributable
   to Southern Company

 
 
 
 
 2,448
 
 
 
2,448
Other comprehensive income (loss)
 
 
 
 
 
 (50) 
 
(50)
Stock issued76,140
 2,599
 380
 3,263
 115
 
 
 
 
3,758
Stock-based compensation
 
 
 120
 
 
 
 
 
120
Cash dividends of $2.2225 per share
 
 
 
 
 (2,104) 
 
 
(2,104)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 618
618
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (57)(57)
Purchase of membership interests
   from noncontrolling interests

 
 
 
 
 
 
 
 (129)(129)
Net income attributable to redeemable
   noncontrolling interests

 
 
 
 
 
 
 
 32
32
Other
 (66) 
 (4) (4) 2
 
 
 
(6)
Balance at December 31, 2016991,213
 (819) $4,952
 $9,661
 $(31) $10,356
 $(180) $609
 $1,245
$26,612
The accompanying notes are an integral part of these consolidated financial statements.

Table of ContentsIndex to Financial Statements

NOTES TO FINANCIAL STATEMENTS
Southern Company and Subsidiary Companies 2016 Annual Report




Index to the Notes to Financial Statements

NotePage
1
2
3
4
5
6
7
8
9
10
11
12
13
14


Table of ContentsIndex to Financial Statements

NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
The Southern Company (Southern Company or the Company) is the parent company of four traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SCS, Southern LINC, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure (as of May 9, 2016), and other direct and indirect subsidiaries. The traditional electric operating companies – Alabama Power, Georgia Power, Gulf Power, and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. Southern Power constructs, acquires, owns, and manages generation assets, including renewableKemper County energy projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through the natural gas distribution utilities in seven states and is involved in several other complementary businesses including gas marketing services, wholesale gas services, and gas midstream operations. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern LINC provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cable services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants. PowerSecure is a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure.
The financial statements reflect Southern Company's investments in the subsidiaries on a consolidated basis. The equity method is used for entities infacility, which the Company has significant influence but does not control and for variable interest entities where the Company has an equity investment but is not the primary beneficiary. Intercompany transactions have been eliminated in consolidation.
The traditional electric operating companies, Southern Power, certain subsidiaries of Southern Company Gas, and certain other subsidiaries are subject to regulation by the FERC, and the traditional electric operating companies and natural gas distribution utilities are also subject to regulation by their respective state PSCs or other applicable state regulatory agencies. As such, the consolidated financial statements reflect the effects of rate regulation in accordance with GAAP and comply with the accounting policies and practices prescribed by relevant state PSCs or other applicable state regulatory agencies. The preparation of financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates. Certain prior years' data presented in the financial statements have been reclassified to conform to the current year presentation. These reclassifications had no impact on Southern Company's results of operations, financial position, or cash flows.
In June 2015, Georgia Power identified an error affecting the billing to a small number of large commercial and industrial customers under a rate plan allowing for variable demand-driven pricing from January 1, 2013 to June 30, 2015. In the second quarter 2015, Georgia Power recorded an out of period adjustment of approximately $75 million to decrease retail revenues, resulting in a decrease to net income of approximately $47 million. Georgia Power evaluated the effects of this error on the interim and annual periods that included the billing error. Based on an analysis of qualitative and quantitative factors, Georgia Power determined the error was not material to any affected period and, therefore, an amendment of previously filed financial statements was not required.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While Southern Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of Southern Company's revenue, including energy provided to customers, is from tariff offerings that provide natural gas or electricity without a defined contractual term. For such arrangements, Southern Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity or natural gas supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
Southern Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on Southern Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If
Table of ContentsIndex to Financial Statements

NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on Southern Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. Southern Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, Southern Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. Southern Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on Southern Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, Southern Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. Southern Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. Southern Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of Southern Company. See Notes 5, 8, and 14 for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. Southern Company is currently assessing the impact of the standardTax Reform Legislation. The revenue requirement was based on its financial statements(i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and has not yet determined its ultimate impact.
On November 17, 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statement of cash flows. Upon adoption, the net change in cash and cash equivalents during the period will include amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to each period presented. Southern Company does not intend to adopt the guidance early. The adoption of ASU 2016-18 will not have a material impact on the financial statements of Southern Company.
Regulatory Assets and Liabilities
The traditional electric operating companies and natural gas distribution utilities are subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers through the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
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Southern Company and Subsidiary Companies 2016 Annual Report

Regulatory assets and (liabilities) reflected in the balance sheets at December 31 relate to:
 2016 2015 Note
 (in millions)  
Retiree benefit plans$3,959
 $3,440
 (a,n)
Deferred income tax charges1,590
 1,514
 (b)
Asset retirement obligations-asset1,080
 481
 (b,n)
Environmental remediation-asset491
 78
 (j,n)
Other regulatory assets355
 299
 (k)
Remaining net book value of retired assets351
 283
 (o)
Under recovered regulatory clause revenues273
 142
 (g)
Loss on reacquired debt243
 248
 (c)
Property damage reserves-asset206
 92
 (i)
Kemper IGCC201
 216
 (h)
Vacation pay182
 178
 (f,n)
Long-term debt fair value adjustment155
 
 (p)
Deferred PPA charges141
 163
 (e,n)
Nuclear outage97
 88
 (g)
Fuel-hedging-asset35
 225
 (d,n)
Other cost of removal obligations(2,774) (1,177) (b)
Deferred income tax credits(219) (187) (b)
Over recovered regulatory clause revenues(203) (261) (g)
Property damage reserves-liability(177) (178) (l)
Other regulatory liabilities(110) (35) (m)
Asset retirement obligations-liability(10) (45) (b,n)
Total regulatory assets (liabilities), net$5,866
 $5,564
  
Note: The recovery and(iv) amortization periods for these regulatory assets and (liabilities) are as follows:
(a)Recovered and amortized over the average remaining service period which may range up to 15 years. See Note 2 for additional information.
(b)Asset retirement and other cost of removal obligations are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 70 years. Asset retirement and removal liabilities will be settled and trued up following completion of the related activities.
(c)Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue, which may range up to 50 years.
(d)Recorded over the life of the underlying hedged purchase contracts, which generally do not exceed five years. Upon final settlement, actual costs incurred are recovered through fuel and energy cost recovery mechanisms.
(e)Recovered over the life of the PPA for periods up to seven years.
(f)Recorded as earned by employees and recovered as paid, generally within one year. This includes both vacation and banked holiday pay.
(g)Recorded and recovered or amortized as approved or accepted by the appropriate state PSCs or other applicable regulatory agencies over periods generally not exceeding ten years.
(h)
Includes $97 million of regulatory assets currently in rates to be recovered over periods of two, seven, or 10 years. For additional information, see Note 3 under "Integrated Coal Gasification Combined CycleRate Recovery of Kemper IGCC CostsRegulatory Assets and Liabilities."
(i)Previous under-recovery as of December 2013 is recorded and recovered or amortized as approved by the Georgia PSC through 2019. Amortization of $185 million related to the under-recovery from January 2014 through December 2016 will be determined by the Georgia PSC in the 2019 base rate case. See Note 3 for additional information.
(j)Recovered through environmental cost recovery mechanisms when the remediation is performed or the work is performed.
(k)Comprised of numerous immaterial components including deferred income tax charges - Medicare subsidy, cancelled construction projects, building and generating plant leases, property tax, and other miscellaneous assets. These costs are recorded and recovered or amortized as approved by the appropriate state PSCs over periods generally not exceeding 50 years.
(l)Recovered as storm restoration and potential reliability-related expenses are incurred as approved by the appropriate state PSCs.
(m)Comprised of numerous immaterial components including retiree benefit plans, fuel-hedging gains, and other liabilities that are recorded and recovered or amortized as approved by the appropriate state PSCs or other applicable regulatory agencies generally over periods not exceeding 4 years.
(n)Not earning a return as offset in rate base by a corresponding asset or liability.
(o)Amortized as approved by the appropriate state PSCs over periods generally up to 11 years.
(p)
Recorded in relation to the Merger. Recovered over the remaining life of the original debt issuances, which range up to 22 years. For additional information see Note 12 under "Southern CompanyMerger with Southern Company Gas."
In the event that a portion of a traditional electric operating company's or a natural gas distribution utility's operations is no longer subject to applicable accounting rules for rate regulation, such company would be required to write off to income or reclassify to accumulated OCI related regulatory assets and liabilities that are not specifically recoverable through regulated rates. In addition,
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Southern Companyeight years and Subsidiary Companies 2016 Annual Report

the traditional electric operating company or natural gas distribution utility would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets and liabilities are to be reflected in rates. See Note 3 under "Regulatory MattersAlabama Power," "Regulatory MattersGeorgia Power," "Regulatory MattersGulf Power," "Regulatory MattersSouthern Company Gas," and "Integrated Coal Gasification Combined Cycle" for additional information.
Revenues
Wholesale capacity revenues from PPAs are recognized either onsix years, respectively. The revenue requirement also reflects a levelized basis over the appropriate contract period or the amount billable under the contract terms. Energy and other revenues are recognized as services are provided. Unbilled revenuesdisallowance related to retail sales are accrued at the enda portion of each fiscal period. Retail rates for the traditional electric operating companies and natural gas distribution utilities may include provisions to adjust billings for fluctuations in fuel and purchased gas costs, fuel hedging, the energy component of purchased power costs, and certain other costs. Revenues are adjusted for differences between these actual costs and amounts billed in current regulated rates. Under or over recovered regulatory clause revenues are recordedMississippi Power's investment in the balance sheets and are recovered or returned to customers through adjustments to the billing factors.
Southern Company's electric utility subsidiaries and Southern Company Gas have a diversified base of customers. No single customer or industry comprises 10% or more of revenues. For all periods presented, uncollectible accounts averaged less than 1% of revenues.
Fuel Costs
Fuel costs are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. Fuel expense also includes the amortization of the cost of nuclear fuel and a charge, based on nuclear generation,Kemper County energy facility requested for the permanent disposal of spent nuclear fuel.
Income and Other Taxes
Southern Company uses the liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. Taxes that are collected from customers on behalf of governmental agencies to be remitted to these agencies are presented net on the statements of income. In accordance with regulatory requirements, deferred federal ITCs for the traditional electric operating companies and Southern Company Gas are amortized over the average lives of the related property with such amortization normally applied as a credit to reduce depreciationinclusion in the statements of income. Under current tax law, certain projects at Southern Power are eligible for federal ITCs or cash grants. Southern Power has elected to receive ITCs. The credits are recorded as a deferred credit and are amortized to income tax expense over the life of the asset. Furthermore, the tax basis of the asset is reduced by 50% of the credits received, resulting in a net deferred tax asset. Southern Power has elected to recognize the tax benefit of this basis difference as a reduction to income tax expense in the year in which the plant reaches commercial operation. In addition, certain projects are eligible for federal PTCs, which are recorded to income tax expense based on KWH production.
Federal ITCs and PTCs, as well as state ITCs and other state tax credits available to reduce income taxes payable, were not fully utilized in 2016 and will be carried forward and utilized in future years. In addition, Southern Company is expected to have a consolidated federal net operating loss (NOL) carryforward for the 2016 tax year along with various state NOL carryforwards, which could result in income tax benefits in the future, if utilized. See Note 5 under "Current and Deferred Income TaxesTax Credit Carryforwards" and " Net Operating Loss" for additional information.
Southern Company recognizes tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 5 under "Unrecognized Tax Benefits" for additional information.
Property, Plant, and Equipment
Property, plant, and equipment is stated at original cost less any regulatory disallowances and impairments. Original cost includes: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and cost of equity funds used during construction.
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Southern Company and Subsidiary Companies 2016 Annual Report

The Southern Company system's property, plant, and equipment in service consisted of the following at December 31:
 2016 2015
 (in millions)
Electric utilities:   
Generation$48,836
 $41,648
Transmission11,156
 10,544
Distribution18,418
 17,670
General4,629
 4,377
Plant acquisition adjustment126
 123
Electric utility plant in service83,165
 74,362
Natural gas distribution utilities:   
Transportation and distribution11,996
 
Utility plant in service95,161
 74,362
Information technology equipment and software544
 222
Communications equipment424
 418
Storage facilities1,463
 
Other824
 116
Total other plant in service3,255
 756
Total plant in service$98,416
 $75,118
The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed with the exception of nuclear refueling costs, which are recorded in accordance with specific state PSC orders. Alabama Power and Georgia Power defer and amortize nuclear refueling costs over the unit's operating cycle. The refueling cycles for Alabama Power's Plant Farley and Georgia Power's Plants Hatch and Vogtle Units 1 and 2 range from 18 to 24 months, depending on the unit.
Assets acquired under a capital lease are included in property, plant, and equipment and are further detailed in the table below:

Asset Balances at
December 31,

2016
2015

(in millions)
Office building$61

$61
Nitrogen plant83

83
Computer-related equipment63

61
Gas pipeline6

6
Less: Accumulated amortization(69)
(59)
Balance, net of amortization$144

$152
The amount of non-cash property additions recognized for the years ended December 31, 2016, 2015, and 2014 was $1.5 billion, $844 million, and $528 million, respectively. These amounts are comprised of construction-related accounts payable outstanding at each year end. Also, the amount of non-cash property additions associated with capitalized leases for the years ended December 31, 2016, 2015, and 2014 was $18 million, $13 million, and $25 million, respectively.
Depreciation and Amortization
Depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates, which approximated 3.0% in 2016 and 2015 and 3.1% in 2014. Depreciation studies are conducted periodically to update the composite rates. These studies are filed with the respective state PSC or other applicable state and federal regulatory agencies for the traditional electric operating companies and natural gas distribution utilities. Accumulated depreciation for utility plant in service totaled $29.3 billion and $23.7 billion at December 31, 2016 and 2015, respectively. When property subject to composite
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Southern Company and Subsidiary Companies 2016 Annual Report

depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the plant are retired when the related property unit is retired. Certain of Southern Power's generation assets are depreciated on a units-of-production basis, using hours or starts, to better match outage and maintenance costs to the usage of and revenues from these assets. Cost, net of salvage value, of these assets is depreciated on an hours or starts units-of-production basis.
Under the terms of the 2013 ARP, Georgia Power amortized approximately $14 million in each of 2014, 2015, and 2016 of its remaining regulatory liability related to other cost of removal obligations.
See Note 3 under "Regulatory MattersGulf PowerRetail Base Rate Cases" for information regarding depreciation and amortization adjustments related to the other cost of removal regulatory liability.
Depreciation of the original cost of other plant in service is provided primarily on a straight-line basis over estimated useful lives ranging from three to 65 years. Accumulated depreciation for other plant in service totaled $550 million and $510 million at December 31, 2016 and 2015, respectively.
Asset Retirement Obligations and Other Costs of Removal
AROs are computed as the present value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. Each traditional electric operating company and natural gas distribution utility has received accounting guidance from its state PSC or applicable state regulatory agency allowing the continued accrual or recovery of other retirement costs for long-lived assets that it does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as a regulatory liability and amounts to be recovered are reflected in the balance sheet as a regulatory asset.
The liability for AROs primarily relates to facilities that are subject to the Disposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in April 2015 (CCR Rule), principally ash ponds, and the decommissioning of the Southern Company system's nuclear facilities – Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2. In addition, the Southern Company system has retirement obligations related to various landfill sites, asbestos removal, mine reclamation, land restoration related to solar and wind facilities, and disposal of polychlorinated biphenyls in certain transformers. The Southern Company system also has identified retirement obligations related to certain electric transmission and distribution facilities, certain wireless communication towers, property associated with the Southern Company system's rail lines and natural gas pipelines, and certain structures authorized by the U.S. Army Corps of Engineers. However, liabilities for the removal of these assets have not been recorded as the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO. The Company will continue to recognize in the statements of income allowed removal costs in accordance with regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability, as ordered by the various state PSCs, and are reflected in the balance sheets. See "Nuclear Decommissioning" herein for additional information on amounts included in rates.
Details of the AROs included in the balance sheets are as follows:
 2016 2015
 (in millions)
Balance at beginning of year$3,759
 $2,201
Liabilities incurred66
 662
Liabilities settled(171) (37)
Accretion162
 115
Cash flow revisions698
 818
Balance at end of year$4,514
 $3,759
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Southern Company and Subsidiary Companies 2016 Annual Report

The increases in cash flow revisions and liabilities incurred in 2016 primarily relate to changes in ash pond closure strategy. The cash flow revisions in 2015 are primarily related to an increase in AROs associated with facilities impacted by the CCR Rule and Georgia Power's updated nuclear decommissioning study.
The cost estimates for AROs related to the CCR Rule are based on information as of December 31, 2016 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their currently anticipated useful life, the traditional electric operating companies expect to continue to periodically update these estimates.
Nuclear Decommissioning
The NRC requires licensees of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. Alabama Power and Georgia Power have external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and state PSCs, as well as the IRS. While Alabama Power and Georgia Power are allowed to prescribe an overall investment policy to the Funds' managers, neither Southern Company nor its subsidiaries or affiliates are allowed to engage in the day-to-day management of the Funds or to mandate individual investment decisions. Day-to-day management of the investments in the Funds is delegated to unrelated third party managers with oversight by the management of Southern Company, Alabama Power, and Georgia Power. The Funds' managers are authorized, within certain investment guidelines, to actively buy and sell securities at their own discretion in order to maximize the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
Southern Company records the investment securities held in the Funds at fair value, as disclosed in Note 10, as management believes that fair value best represents the nature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value adjustments and realized gains and losses are determined on a specific identification basis.
The Funds at Georgia Power participate in a securities lending program through the managers of the Funds. Under this program, the Funds' investment securities are loaned to institutional investors for a fee. Securities loaned are fully collateralized by cash, letters of credit, and/or securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. As of December 31, 2016 and 2015, approximately $56 million and $76 million, respectively, of the fair market value of the Funds' securities were on loan and pledged to creditors under the Funds' managers' securities lending program. The fair value of the collateral received was approximately $58 million and $78 million at December 31, 2016 and 2015, respectively, and can only be sold by the borrower upon the return of the loaned securities. The collateral received is treated as a non-cash item in the statements of cash flows.
At December 31, 2016, investment securities in the Funds totaled $1.6 billion, consisting of equity securities of $878 million, debt securities of $685 million, and $41 million of other securities. At December 31, 2015, investment securities in the Funds totaled $1.5 billion, consisting of equity securities of $817 million, debt securities of $654 million, and $38 million of other securities. These amounts include the investment securities pledged to creditors and collateral received and exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases and the lending pool.
Sales of the securities held in the Funds resulted in cash proceeds of $1.2 billion, $1.4 billion, and $0.9 billion in 2016, 2015, and 2014, respectively, all of which were reinvested. For 2016, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $114 million, which included $48 million related to unrealized gains on securities held in the Funds at December 31, 2016. For 2015, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $11 million, which included $83 million related to unrealized losses on securities held in the Funds at December 31, 2015. For 2014, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $98 million, which included $19 million related to unrealized gains and losses on securities held in the Funds at December 31, 2014. While the investment securities held in the Funds are reported as trading securities, the Funds continue to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.
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Southern Company and Subsidiary Companies 2016 Annual Report

For Alabama Power, approximately $19 million and $20 million at December 31, 2016 and 2015, respectively, previously recorded in internal reserves is being transferred into the Funds through 2040 as approved by the Alabama PSC. The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. Alabama Power and Georgia Power have filed plans with the NRC designed to ensure that, over time, the deposits and earnings of the Funds will provide the minimum funding amounts prescribed by the NRC.
At December 31, 2016 and 2015, the accumulated provisions for the external decommissioning trust funds were as follows:
 External Trust Funds
 2016 2015
 (in millions)
Plant Farley$790
 $734
Plant Hatch511
 487
Plant Vogtle Units 1 and 2303
 288
Site study cost is the estimate to decommission a specific facility as of the site study year. The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may vary from these estimates because of changes in the assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates. The estimated costs of decommissioning as of December 31, 2016 based on the most current studies, which were performed in 2013 for Alabama Power's Plant Farley and in 2015 for the Georgia Power plants, were as follows for Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2:
 Plant Farley Plant Hatch 
Plant Vogtle
Units 1 and 2
Decommissioning periods:     
Beginning year2037
 2034
 2047
Completion year2076
 2075
 2079
 (in millions)
Site study costs:     
Radiated structures$1,362
 $678
 $568
Spent fuel management
 160
 147
Non-radiated structures80
 64
 89
Total site study costs$1,442
 $902
 $804
For ratemaking purposes, Alabama Power's decommissioning costs are based on the site study, and Georgia Power's decommissioning costs are based on the NRC generic estimate to decommission the radioactive portion of the facilities and the site study estimate for spent fuel management as of 2012. Under the 2013 ARP, the Georgia PSC approved Georgia Power's annual decommissioning cost for ratemaking of $4 million and $2 million for Plant Hatch and Plant Vogtle Units 1 and 2, respectively. Georgia Power expects the Georgia PSC to review and adjust, if necessary, the amounts collected in rates for nuclear decommissioning costs in Georgia Power's 2019 base rate case. Significant assumptions used to determine these costs for ratemaking were an inflation rate of 4.5% and 2.4% for Alabama Power and Georgia Power, respectively, and a trust earnings rate of 7.0% and 4.4% for Alabama Power and Georgia Power, respectively.
Amounts previously contributed to the Funds for Plant Farley are currently projected to be adequate to meet the decommissioning obligations. Alabama Power will continue to provide site-specific estimates of the decommissioning costs and related projections of funds in the external trust to the Alabama PSC and, if necessary, would seek the Alabama PSC's approval to address any changes in a manner consistent with NRC and other applicable requirements.
Allowance for Funds Used During Construction and Interest Capitalized
The traditional electric operating companies and certain of the natural gas distribution utilities record AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the plant through a higher rate base, and higher depreciation. The equity component of AFUDC is not included in calculating taxable
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Southern Company and Subsidiary Companies 2016 Annual Report

income. Interest related to the construction of new facilities not included in the traditional electric operating companies' and natural gas distribution utilities' regulated rates is capitalized in accordance with standard interest capitalization requirements. AFUDC and interest capitalized, net of income taxes were 11.4%, 12.8%, and 16.0% of net income for 2016, 2015, and 2014, respectively.
Cash payments for interest totaled $1.1 billion, $809 million, and $732 million in 2016, 2015, and 2014, respectively, net of amounts capitalized of $125 million, $124 million, and $111 million, respectively.
Impairment of Long-Lived Assets
Southern Company evaluates long-lived assets for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. The determination of whether an impairment has occurred is based on either a specific regulatory disallowance or an estimate of undiscounted future cash flows attributable to the assets, as compared with the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by either the amount of regulatory disallowance or by estimating the fair value of the assets and recording a loss if the carrying value is greater than the fair value. For assets identified as held for sale, the carrying value is compared to the estimated fair value less the cost to sell in order to determine if an impairment loss is required. Until the assets are disposed of, their estimated fair value is re-evaluated when circumstances or events change. See Note 3 under "Integrated Coal Gasification Combined CycleKemper IGCC Schedule and Cost Estimate" for additional information.
Goodwill and Other Intangible Assets and Liabilities
At December 31, 2016 and 2015, goodwillwhich was $6.3 billion and $2 million, respectively. The increase in goodwill relates to Southern Company's acquisitions of PowerSecure and Southern Company Gas. See Note 12 under "Southern CompanyAcquisition of PowerSecure" and " – Merger with Southern Company Gas" for additional information.
Goodwill is not amortized, but is subject to an annual impairment test during the fourth quarter of each year, or more frequently if impairment indicators arise. Southern Company evaluated its goodwillrecorded in the fourth quarter 20162017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and determined thatinclude no impairment was required.
At December 31, 2016, other intangible assets were as follows:
 Estimated Useful LifeGross Carrying AmountAccumulated AmortizationOther
Intangible Assets, Net
  (in millions)
Other intangible assets subject to amortization:    
Customer relationships11-26 years$268
$(32)$236
Trade names5-28 years158
(5)153
Patents3-10 years4

4
Backlog5 years5
(1)4
Storage and transportation contracts1-5 years64
(2)62
Software and other1-12 years2

2
PPA fair value adjustments19-20 years456
(22)434
Total other intangible assets subject to amortization $957
$(62)$895
Other intangible assets not subject to amortization:    
Federal Communications Commission licenses 75

75
Total other intangible assets $1,032
$(62)$970
At December 31, 2015, other intangible assets consisted of Southern Power's PPA fair value adjustments with a net carrying amount of $317 million. The increase in other intangible assets primarily relates to Southern Company's acquisitions of PowerSecure and Southern Company Gas, as well as additional PPA fair value adjustments resulting from Southern Power's acquisitions.
Amortization associated with other intangible assets in 2016, 2015, and 2014 was $50 million, $3 million, and $3 million, respectively.
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Southern Company and Subsidiary Companies 2016 Annual Report

As of December 31, 2016, the estimated amortization associated with other intangible assets is as follows:
 Amortization
 (in millions)
2017$108
201893
201974
202063
202156
Included in other deferred credits and liabilities on the balance sheet is $91 million of intangible liabilities that were recorded during acquisition accountingrecovery for transportation contracts at Southern Company Gas. At December 31, 2016, the accumulated amortization of these intangible liabilities was $21 million. The estimated amortizationcosts associated with the intangible liabilities that will be recorded in natural gas revenues is as follows:
 Amortization
 (in millions)
2017$29
201824
201917
See Note 12 under "Southern CompanyAcquisition of PowerSecure" and " – Merger with Southern Company Gas" for additional information. Also see Note 12 under "Southern Power" for additional information regarding Southern Power's PPA fair value adjustments.
Storm Damage Reserves
Each traditional electric operating company maintains a reserve to cover or is allowed to defer and recover the cost of damages from major storms to its transmission and distribution lines and generally the cost of uninsured damages to its generation facilities and other property. In accordance with their respective state PSC orders, the traditional electric operating companies accrued $40 million in each of 2016, 2015, and 2014. Alabama Power, Gulf Power, and Mississippi Power also have authority based on orders from their state PSCs to accrue certain additional amounts as circumstances warrant. In 2016, 2015, and 2014, there were no such additional accruals. See Note 3 under "Regulatory MattersAlabama PowerRate NDR" and "Regulatory MattersGeorgia PowerStorm Damage Recovery" for additional information regarding Alabama Power's NDR and Georgia Power's deferred storm costs, respectively.
Leveraged Leases
Southern Company has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows.
Southern Company's net investment in domestic and international leveraged leases consists of the following at December 31:
 2016 2015
 (in millions)
Net rentals receivable$1,481
 $1,487
Unearned income(707) (732)
Investment in leveraged leases774
 755
Deferred taxes from leveraged leases(309) (303)
Net investment in leveraged leases$465
 $452
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

A summary of the components of income from the leveraged leases follows:
 2016 2015 2014
 (in millions)
Pretax leveraged lease income$25
 $20
 $24
Income tax expense(9) (7) (9)
Net leveraged lease income$16
 $13
 $15
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Materials and Supplies
Generally, materials and supplies include the average cost of transmission, distribution, and generating plant materials. Materials are charged to inventory when purchased and then expensed or capitalized to plant, as appropriate, at weighted average cost when installed.
Fuel Inventory
Fuel inventory includes the average cost of coal, natural gas, oil, transportation, and emissions allowances of the electric utilities. Fuel is recorded to inventory when purchased and then expensed, at weighted average cost, as used and recovered by the traditional electric operating companies through fuel cost recovery rates approved by each state PSC. Emissions allowances granted by the EPA are included in inventory at zero cost.
Natural Gas for Sale
The natural gas distribution utilities, with the exception of Nicor Gas, carry natural gas inventory on a weighted average cost of gas (WACOG) basis.
Nicor Gas' natural gas inventory is carried at cost on a last-in, first-out (LIFO) basis. Inventory decrements occurring during the year that are restored prior to year-end are charged to cost of natural gas at the estimated annual replacement cost. Inventory decrements that are not restored prior to year-end are charged to cost of natural gas at the actual LIFO cost of the inventory layers liquidated. The cost of natural gas, including inventory costs, is recovered from customers under a purchased gas recovery mechanism adjusted for differences between actual costs and amounts billed; therefore, LIFO liquidations have no impact on Southern Company's net income.
Natural gas inventories for Southern Company Gas' non-utility businesses are carried at the lower of weighted average cost or current market price, with cost determined on a WACOG basis. For any declines in market prices below the WACOG considered to be other than temporary, an adjustment is recorded to reduce the value of natural gas inventories to market value.
Financial Instruments
Southern Company and its subsidiaries use derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, electricity purchases and sales, and occasionally foreign currency exchange rates. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (included in "Other" or shown separately as "Risk Management Activities") and are measured at fair value. See Note 10 for additional information regarding fair value. Substantially all of the Southern Company system's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the traditional electric operating companies' and the natural gas distribution utilities' fuel-hedging programs result in the deferral of related gains and losses in OCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. Any ineffectiveness arising from cash flow hedges is recognized currently in net income. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the statements of income. Cash flows from derivatives are classified on the statements of cash flows in the same category as the hedged item. See Note 11 for additional information regarding derivatives.
Beginning in 2016, the Company offsets fair value amounts recognized for multiple derivative instruments executed with the same counterparty under a master netting arrangement. At December 31, 2016, the amount included in accounts payable in the
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

balance sheets that the Company has recognized for the obligation to return cash collateral arising from derivative instruments was immaterial.
Southern Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company has established controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income, changes in the fair value of qualifying cash flow hedges and marketable securities, certain changes in pension and other postretirement benefit plans, reclassifications for amounts included in net income, and dividends on preferred and preference stock of subsidiaries.
Accumulated OCI (loss) balances, net of tax effects, were as follows:
 
Qualifying
Hedges
 
Marketable
Securities
 
Pension and Other
Postretirement
Benefit Plans
 
Accumulated Other
Comprehensive
Income (Loss)
 (in millions)
Balance at December 31, 2015$(48) $
 $(82) $(130)
Current period change(67) 
 17
 (50)
Balance at December 31, 2016$(115) $
 $(65) $(180)
2. RETIREMENT BENEFITS
Southern Company has a defined benefit, trusteed, pension plan covering substantially all employees, with the exception of employees at Southern Company Gas, as discussed below, and PowerSecure. This qualified pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). On December 19, 2016, the traditional electric operating companies and certain other subsidiaries voluntarily contributed an aggregate of $900 million to Southern Company's qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2017. Southern Company also provides certain defined benefit pension plans for a selected group of management and highly compensated employees. Benefits under these non-qualified pension plans are funded on a cash basis. In addition, Southern Company provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans. The traditional electric operating companies fund related other postretirement trusts to the extent required by their respective regulatory commissions. For the year ending December 31, 2017, no other postretirement trust contributions are expected.
In addition, Southern Company Gas has a qualified defined benefit, trusteed, pension plan covering certain eligible employees, which was closed in 2012 to new employees. This qualified pension plan is funded in accordance with requirements of ERISA. Southern Company Gas voluntarily contributed $125 million to its qualified pension plan on September 12, 2016. No mandatory contributions to the Southern Company Gas qualified pension plan are anticipated for the year ending December 31, 2017. Southern Company Gas also provides certain non-qualified defined benefit and defined contribution pension plans for a selected group of management and highly compensated employees. Benefits under these non-qualified pension plans are funded on a cash basis. In addition, Southern Company Gas provides certain medical care and life insurance benefits for eligible retired employees through a postretirement benefit plan. Southern Company Gas also has a separate unfunded supplemental retirement health care plan that provides medical care and life insurance benefits to employees of discontinued businesses. For the year ending December 31, 2017, no other postretirement trust contributions are expected.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the following year and the benefit obligations as of the measurement date are presented below.
Assumptions used to determine net periodic costs:2016 2015 2014
Pension plans     
Discount rate – benefit obligations4.58% 4.17% 5.02%
Discount rate – interest costs3.88
 4.17
 5.02
Discount rate – service costs4.98
 4.48
 5.02
Expected long-term return on plan assets8.16
 8.20
 8.20
Annual salary increase4.37
 3.59
 3.59
Other postretirement benefit plans     
Discount rate – benefit obligations4.38% 4.04% 4.85%
Discount rate – interest costs3.66
 4.04
 4.85
Discount rate – service costs4.85
 4.39
 4.85
Expected long-term return on plan assets6.66
 6.97
 7.15
Annual salary increase4.37
 3.59
 3.59
Assumptions used to determine benefit obligations:2016
2015
Pension plans


Discount rate4.40%
4.67%
Annual salary increase4.37

4.46
Other postretirement benefit plans


Discount rate4.23%
4.51%
Annual salary increase4.37

4.46
The Company estimates the expected rate of return on pension plan and other postretirement benefit plan assets using a financial model to project the expected return on each current investment portfolio. The analysis projects an expected rate of return on each of seven different asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a periodic rebalancing of each trust's portfolio.
An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO as of December 31, 2016 were as follows:
 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.50% 4.50% 2025
Post-65 medical5.00
 4.50
 2025
Post-65 prescription10.00
 4.50
 2025
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

An annual increase or decrease in the assumed medical care cost trend rate of 1% would affect the APBO and the service and interest cost components at December 31, 2016 as follows:
 1 Percent
Increase
 1 Percent
Decrease
 (in millions)
Benefit obligation$128
 $110
Service and interest costs4
 3
Pension Plans
The total accumulated benefit obligation for the pension plans was $11.3 billion at December 31, 2016 and $9.6 billion at December 31, 2015. Changes in the projected benefit obligations and the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$10,542
 $10,909
Acquisitions1,244
 
Service cost262
 257
Interest cost422
 445
Benefits paid(466) (487)
Actuarial (gain) loss381
 (582)
Balance at end of year12,385
 10,542
Change in plan assets   
Fair value of plan assets at beginning of year9,234
 9,690
Acquisitions837
 
Actual return (loss) on plan assets902
 (14)
Employer contributions1,076
 45
Benefits paid(466) (487)
Fair value of plan assets at end of year11,583
 9,234
Accrued liability$(802) $(1,308)
At December 31, 2016, the projected benefit obligations for the qualified and non-qualified pension plans were $11.8 billion and $627 million, respectively. All pension plan assets are related to the qualified pension plans.
Amounts presented in the following tables do not include regulatory assets of $369 million recognized by Southern Company Gas associated with its pension plans prior to its acquisition on July 1, 2016.
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's pension plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$3,207
 $2,998
Other current liabilities(53) (46)
Employee benefit obligations(749) (1,262)
Other regulatory liabilities, deferred(87) 
Accumulated OCI100
 125
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Presented below are the amounts included in accumulated OCI and regulatory assets at December 31, 2016 and 2015 related to the defined benefit pension plans that had not yet been recognized in net periodic pension cost along with the estimated amortization of such amounts for 2017.
 
Prior
Service
Cost
 Net (Gain) Loss
 (in millions)
Balance at December 31, 2016:   
Accumulated OCI$4
 $96
Regulatory assets51
 3,069
Total$55
 $3,165
Balance at December 31, 2015:   
Accumulated OCI$3
 $122
Regulatory assets27
 2,971
Total$30
 $3,093
Estimated amortization in net periodic pension cost in 2017:   
Accumulated OCI$1
 $7
Regulatory assets11
 155
Total$12
 $162
The components of OCI and the changes in the balance of regulatory assets related to the defined benefit pension plans for the years ended December 31, 2016 and 2015 are presented in the following table:
 
Accumulated
OCI
 Regulatory Assets
 (in millions)
Balance at December 31, 2014$134
 $3,073
Net (gain) loss1
 155
Reclassification adjustments:   
Amortization of prior service costs(1) (24)
Amortization of net gain (loss)(9) (206)
Total reclassification adjustments(10) (230)
Total change(9) (75)
Balance at December 31, 2015$125
 $2,998
Net (gain) loss(20) 243
Change in prior service costs2
 37
Reclassification adjustments:   
Amortization of prior service costs(1) (13)
Amortization of net gain (loss)(6) (145)
Total reclassification adjustments(7) (158)
Total change(25) 122
Balance at December 31, 2016$100
 $3,120
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Components of net periodic pension cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$262
 $257
 $213
Interest cost422
 445
 435
Expected return on plan assets(782) (724) (645)
Recognized net (gain) loss150
 215
 110
Net amortization14
 25
 26
Net periodic pension cost$66
 $218
 $139
Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the Company has elected to amortize changes in the market value of all plan assets over five years rather than recognize the changes immediately. As a result, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.
Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2016, estimated benefit payments were as follows:
 
Benefit
Payments
 (in millions)
2017$571
2018593
2019620
2020646
2021666
2022 to 20263,673
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Other Postretirement Benefits
Changes in the APBO and in the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$1,989
 $1,986
Acquisitions338
 
Service cost22
 23
Interest cost76
 78
Benefits paid(119) (102)
Actuarial (gain) loss(16) (38)
Plan amendments
 34
Retiree drug subsidy7
 8
Balance at end of year2,297
 1,989
Change in plan assets   
Fair value of plan assets at beginning of year833
 900
Acquisitions100
 
Actual return (loss) on plan assets58
 (12)
Employer contributions65
 39
Benefits paid(112) (94)
Fair value of plan assets at end of year944
 833
Accrued liability$(1,353) $(1,156)
Amounts presented in the following tables do not include regulatory assets of $77 million recognized by Southern Company Gas associated with its other postretirement benefit plan prior to its acquisition on July 1, 2016.
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's other postretirement benefit plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$419
 $433
Other current liabilities(4) (4)
Employee benefit obligations(1,349) (1,152)
Other regulatory liabilities, deferred(41) (22)
Accumulated OCI7
 8
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Presented below are the amounts included in accumulated OCI and net regulatory assets (liabilities) at December 31, 2016 and 2015 related to the other postretirement benefit plans that had not yet been recognized in net periodic other postretirement benefit cost along with the estimated amortization of such amounts for 2017.
 
Prior
Service
Cost
 
Net (Gain)
Loss
 (in millions)
Balance at December 31, 2016:   
Accumulated OCI$
 $7
Net regulatory assets25
 353
Total$25
 $360
Balance at December 31, 2015:   
Accumulated OCI$
 $8
Net regulatory assets32
 379
Total$32
 $387
Estimated amortization as net periodic postretirement benefit cost in 2017:   
Net regulatory assets$6
 $13
The components of OCI, along with the changes in the balance of net regulatory assets (liabilities), related to the other postretirement benefit plans for the plan years ended December 31, 2016 and 2015 are presented in the following table:
 
Accumulated
OCI
 
Net Regulatory
Assets
(Liabilities)
 (in millions)
Balance at December 31, 2014$8
 $366
Net (gain) loss
 33
Change in prior service costs
 33
Reclassification adjustments:   
Amortization of prior service costs
 (4)
Amortization of net gain (loss)
 (17)
Total reclassification adjustments
 (21)
Total change
 45
Balance at December 31, 2015$8
 $411
Net (gain) loss(1) (13)
Reclassification adjustments:   
Amortization of prior service costs
 (6)
Amortization of net gain (loss)
 (14)
Total reclassification adjustments
 (20)
Total change(1) (33)
Balance at December 31, 2016$7
 $378
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Components of the other postretirement benefit plans' net periodic cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$22
 $23
 $21
Interest cost76
 78
 79
Expected return on plan assets(60) (58) (59)
Net amortization21
 21
 6
Net periodic postretirement benefit cost$59
 $64
 $47
Future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. Estimated benefit payments are reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 
Benefit
Payments
 
Subsidy
Receipts
 Total
 (in millions)
2017$145
 $(10) $135
2018150
 (11) 139
2019155
 (12) 143
2020159
 (13) 146
2021162
 (14) 148
2022 to 2026823
 (73) 750
Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code of 1986, as amended (Internal Revenue Code). The Company's investment policies for both the pension plans and the other postretirement benefit plans cover a diversified mix of assets as described below. Derivative instruments may be used to gain efficient exposure to the various asset classes and as hedging tools. Additionally, the Company minimizes the risk of large losses primarily through diversification but also monitors and manages other aspects of risk.
The investment strategy for plan assets related to the Company's qualified pension plans is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significantgasifier portion of the liabilityKemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of the pension plans is long-term in nature, the assets are invested consistent with long-term investment expectationsseparate rates for return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Southern Company plan employs a formal rebalancing program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Investment Strategies and Benefit Plan Asset Fair Values
A description of the major asset classes that the pension and other postretirement benefit plans are comprised of, alongcosts associated with the valuation methods usedKemper County energy facility; these costs are proposed to be included in rates for fair value measurement, is provided below:
DescriptionValuation Methodology
Domestic equity: A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.

International equity: A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Domestic and International equities such as common stocks, American depositary receipts, and real estate investment trusts that trade on public exchanges are classified as Level 1 investments and are valued at the closing price in the active market. Equity funds with unpublished prices are valued as Level 2 when the underlying holdings are comprised of Level 1 or Level 2 equity securities.
Fixed income: A mix of domestic and international bonds.
Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
Trust-owned life insurance (TOLI): Investments of the Company's taxable trusts aimed at minimizing the impact of taxes on the portfolio.
Investments in TOLI policies are classified as Level 2 investments and are valued based on the underlying investments held in the policy's separate accounts. The underlying assets are equity and fixed income pooled funds that are comprised of Level 1 and Level 2 securities.
Special situations: Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies, as well as investments in promising new strategies of a longer-term nature.

Real estate: Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.

Private equity: Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.
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NOTES (continued)
Southern CompanyPEP, ECO Plan, and Subsidiary Companies 2016 Annual Report

The fair values, and actual allocations relative to the target allocations, of Southern Company's pension plan (excluding Southern Company Gas)ad valorem tax adjustment factor, as of December 31, 2016 and 2015 are presented below. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, management relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
These fair values exclude cash, receivables related to investment income and pending investment sales, and payables related to pending investment purchases.
 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Significant
Unobservable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
As of December 31, 2016:(Level 1)(Level 2)(Level 3)(NAV)Total
 (in millions)  
Assets:       
Domestic equity(*)
$2,010
$927
$
$
$2,937
26%29%
International equity(*)
1,231
1,110


2,341
25
22
Fixed income:     23
29
U.S. Treasury, government, and agency bonds
588


588


Mortgage- and asset-backed securities
13


13


Corporate bonds
991


991


Pooled funds
524


524


Cash equivalents and other996
2


998


Real estate investments310


1,152
1,462
14
13
Special situations



180
180
3
2
Private equity


549
549
9
5
Total$4,547
$4,155
$
$1,881
$10,583
100%100%
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Significant
Unobservable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
As of December 31, 2015:(Level 1)(Level 2)(Level 3)(NAV)Total
 (in millions)  
Assets:       
Domestic equity(a)
$1,632
$681
$
$
$2,313
26%30%
International equity(a)
1,190
962


2,152
25
23
Fixed income:     23
23
U.S. Treasury, government, and agency bonds
454


454


Mortgage- and asset-backed securities
199


199


Corporate bonds
1,140


1,140


Pooled funds
500


500


Cash equivalents and other
145


145


Real estate investments299


1,185
1,484
14
16
Special situations(b)



160
160
3
2
Private equity


536
536
9
6
Total$3,121
$4,081
$
$1,881
$9,083
100%100%
Liabilities:       
Derivatives$(1)$
$
$
$(1)

Total$3,120
$4,081
$
$1,881
$9,082
100%100%
(a)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
(b)The 2015 presentation above has been revised to separately reflect special situations, consistent with the 2016 presentation.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

The fair values of Southern Company Gas' pension plan assets for the period ended December 31, 2016 are presented below. The fair value measurements exclude cash, receivables related to investment income, pending investment sales, and payables related to pending investment purchases. For 2016, special situations (absolute return and hedge funds) investment assets are presented in the tables below based on the nature of the investment.
 Fair Value Measurements Using 
 Quoted Prices in Active Markets for Identical AssetsSignificant
Other
Observable
Inputs
Significant
Unobservable
Inputs
Net Asset Value as a Practical Expedient 
As of December 31, 2016:(Level 1)(Level 2)(Level 3)(NAV)Total
 (in millions)
Assets:     
Domestic equity(*)
$142
$343
$
$
$485
International equity(*)

185


185
Fixed income:     
U.S. Treasury, government, and agency bonds
85


85
Corporate bonds
41


41
Pooled funds
66


66
Cash equivalents and other12
5

83
100
Real estate investments4


15
19
Private equity


2
2
Total$158
$725
$
$100
$983
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
The assets of Southern Company Gas' pension plan were allocated 69% equity, 20% fixed income, 1% cash, and 10% other at December 31, 2016, compared to the asset class targets of 53% equity, 15% fixed income, 2% cash, and 30% other. Southern Company Gas' pension plan investment policy provides for variation around the target asset allocation in the form of ranges.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

The fair values of Southern Company's (excluding Southern Company Gas) other postretirement benefit plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investment sales, and payables related to pending investment purchases.
 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Significant
Unobservable
Inputs
Net Asset Value as a Practical ExpedientTotalTarget AllocationActual Allocation
As of December 31, 2016:(Level 1)(Level 2)(Level 3)(NAV)
 (in millions)  
Assets:       
Domestic equity(*)
$118
$28
$
$
$146
39%40%
International equity(*)
37
61


98
23
21
Fixed income:     29
31
U.S. Treasury, government,
and agency bonds

24


24


Corporate bonds
30


30


Pooled funds
49


49


Cash equivalents and other41



41


Trust-owned life insurance
382


382


Real estate investments11


35
46
5
5
Special situations


5
5
1
1
Private equity


17
17
3
2
Total$207
$574
$
$57
$838
100%100%
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.

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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Significant
Unobservable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
As of December 31, 2015:(Level 1)(Level 2)(Level 3)(NAV)Total
 (in millions)  
Assets:       
Domestic equity(a)
$106
$52
$
$
$158
42%38%
International equity(a)
40
63


103
21
23
Fixed income:     28
30
U.S. Treasury, government, and agency bonds
22


22


Mortgage- and asset-backed securities
7


7


Corporate bonds
38


38


Pooled funds
42


42


Cash equivalents and other11
9


20


Trust-owned life insurance
370


370


Real estate investments11


40
51
5
6
Special situations(b)



5
5
1
1
Private equity


18
18
3
2
Total$168
$603
$
$63
$834
100%100%
(a)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
(b)The 2015 presentation above has been revised to separately reflect special situations, consistent with the 2016 presentation.
The fair values of Southern Company Gas' other postretirement benefit plan assets for the period ended December 31, 2016 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investment sales, and payables related to pending investment purchases. For 2016, special situations (absolute return and hedge funds) investment assets are presented in the tables below based on the nature of the investment.
 Fair Value Measurements Using 
 Quoted Prices in Active Markets for Identical AssetsSignificant
Other
Observable
Inputs
Significant
Unobservable
Inputs
Net Asset Value as a Practical ExpedientTotal
As of December 31, 2016:(Level 1)(Level 2)(Level 3)(NAV)
 (in millions)
Assets:     
Domestic equity(*)
$3
$58
$
$
$61
International equity(*)

18


18
Fixed income:    

Pooled funds
23


23
Cash equivalents and other1


2
3
Total$4
$99
$
$2
$105
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
The assets of Southern Company Gas' other postretirement benefit plans were allocated 74% equity, 23% fixed income, 1% cash, and 2% other at December 31, 2016, compared to the asset class targets of 72% equity, 24% fixed income, 1% cash, and 3%
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

other. Southern Company Gas' other postretirement plan's investment policy provides for some variation in these targets in the form of ranges around the target.
Employee Savings Plan
Southern Company and its subsidiaries also sponsor 401(k) defined contribution plans covering substantially all employees and provide matching contributions up to specified percentages of an employee's eligible pay. Total matching contributions made to the plans for 2016, 2015, and 2014 were $105 million, $92 million, and $87 million, respectively.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
Nicor Gas and Nicor Energy Services Company, wholly-owned subsidiaries of Southern Company Gas, and Nicor Inc. are defendants in a putative class action initially filed in 2011 in state court in Cook County, Illinois. The plaintiffs purport to represent a class of the customers who purchased the Gas Line Comfort Guard product from Nicor Energy Services Company and variously allege that the marketing, sale, and billing of the Gas Line Comfort Guard product violated the Illinois Consumer Fraud and Deceptive Business Practices Act, constituting common law fraud and resulting in unjust enrichment of these entities. The plaintiffs seek, on behalf of the classes they purport to represent, actual and punitive damages, interest, costs, attorney fees, and injunctive relief. On February 8, 2017, the judge denied the plaintiffs' motion for class certification and Southern Company Gas' motion for summary judgment.applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On January 20, 2017,December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a purported securities class action complaint was15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed againstwith the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and certainMississippi Power of its and Mississippi Power's officers in the U.S. District Court for the Northern District of Georgia, Atlanta Division, by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company and certain of its and Mississippi Power's officers made materially false and misleading statements regardingan investigation related to the Kemper IGCC in violationCounty energy facility. The ultimate outcome of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. Southern Company believes this legal challenge has no merit;matter cannot be determined at this time; however, an adverse outcome in this proceedingit could have ana material impact on Southern Company's resultsand Mississippi Power's financial statements.
Table of operations, financial condition, and liquidity. ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company will vigorously defend itself in this matter,and Subsidiary Companies 2019 Annual Report

Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information regarding infrastructure replacement programs at certain of the natural gas distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(a)Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 2 to the financial statements under "Southern Company and its subsidiaries are subject to certain claims and legal actions arising in the ordinary course of business. In addition, the business activities of Southern Company's subsidiaries are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claimsGasRate Proceedings" for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation against Southern Company and its subsidiaries cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on Southern Company's financial statements.
Environmental Matters
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and the natural gas distribution utilities in Illinois, New Jersey, Georgia, and Florida, have each received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies.
Georgia Power's environmental remediation liability as of December 31, 2016 was $17 million. Georgia Power has been designated or identified as a potentially responsible party at sites governed by the Georgia Hazardous Site Response Act and/or by the federal Comprehensive Environmental Response, Compensation, and Liability Act, and assessment and potential cleanup of such sites is expected.additional information.
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report


Gulf Power's environmental remediation liability includes estimated costsAffiliate Asset Management Agreements
With the exception of environmental remediation projectsNicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of approximately $44 million as of December 31, 2016. These estimated costs primarily relatereducing utility customers' gas cost recovery rates through payments to site closure criteriathe utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Florida Department of Environmental Protection (FDEP)Georgia PSC and are utilized for potential impactsinfrastructure improvements and to soil and groundwater from herbicide applications at Gulf Power's substations. The schedule for completion of the remediation projects is subjectfund heating assistance programs, rather than as a reduction to FDEP approval. The projects have been approved by the Florida PSC for recovery through Gulf Power's environmentalgas cost recovery clause; therefore,rates. Under these liabilities have no impact on net income.asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' environmental remediation liability asauthorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of December 31, 2016 was $426 million basedan allowed equity rate of return on the estimated cost of environmental investigation and remediationassets associated with known currentcertain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Programs
The Registrants are engaged in continuous construction programs to accommodate existing and formerestimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations.
For the traditional electric operating sites. These environmental remediation expenditurescompanies, major generation construction projects are recoverable from customers through rate mechanisms approvedsubject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the applicable state regulatory agenciesfinancial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See "Southern Company Gas" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities and certain pipeline construction projects.
See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein for additional information regarding the Registrants' capital requirements for their construction programs, including estimated totals for each of the next five years.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement,
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the exceptionEPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Services Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of one site representing $5Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events.
See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total accrued remediation costs.approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In September 2015,April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the EPA filed an administrative complaintregulatory-approved in-service dates of November 2021 for Unit 3 and noticeNovember 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of opportunityactivities and completion percentages below the April 2019 aggressive strategy targets. However,
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Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for hearing against Nicor Gas. The complaint alleges violationUnit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the regulatory requirements applicableaggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to polychlorinated biphenylsbelieve that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the Nicor Gas natural gas distributioninstallation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the EPA seeks a total civil penaltyinitial testing and start-up, including any required engineering changes or any remediation related thereto, of approximately $0.3 million. On January 26, 2017,plant systems, structures, or components (some of which are based on new technology that only within the EPA notified Nicor Gas that it agreed to voluntarily dismiss its administrative complaint with prejudice and without paymentlast few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of a civil penaltywhich may require additional labor and/or materials; or other further obligation onissues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of Nicor Gas.the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time; however,time. However, any extension of the final dispositionregulatory-approved project schedule is currently estimated to result in additional base capital costs of these mattersapproximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to have a material impact on Southern Company's financial statements.be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Nuclear Fuel Disposal CostsJoint Owner Contracts
Acting throughIn November 2017, the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. governmentVogtle Owners entered into contracts with Alabama Poweran amendment to their joint ownership agreements for Plant Vogtle Units 3 and Georgia Power4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the DOE to disposevote of spent nuclear fuel and high level radioactive waste generatedthe holders of at Plants Hatch and Farley andleast 90% of the ownership interests in Plant Vogtle Units 13 and 2 beginning no later than January 31, 1998.4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The DOE has yet to commenceVogtle Joint Ownership Agreements also confirm that the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, Alabama Power andVogtle Owners' sole recourse against Georgia Power pursued and continueor Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to pursue legal remedies against the U.S. government for its partial breach of contract.
In 2014, the Court of Federal Claims entered a judgment in favorremoval of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of an increase in the total project capital cost forecast and Alabama PowerGeorgia Power's decision not to seek rate recovery of the increase in their spent nuclear fuel lawsuit seeking damages for the period from January 1, 2005 through December 31, 2010. In March 2015, Georgia Power recovered approximately $18 million, based on itsbase capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests which was credited to accounts where the original costs were charged and reduced rate base, fuel, and cost of service for the benefit of customers. Also in March 2015, Alabama Power recovered approximately $26 million, which was applied to reduce the cost of service for the benefit of customers.
In 2014, Alabama Power and Georgia Power filed additional lawsuits against the U.S. government for the costs of continuing to store spent nuclear fuel at Plants Farley and Hatch and Plant Vogtle Units 13 and 2 for4 were required to vote to continue construction. In September 2018, the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extendedVogtle Owners unanimously voted to December 31, 2014. Damages will continue to accumulate until the issue is resolved or storage is provided. No amounts have been recognized in the financial statements asconstruction of December 31, 2016 for any potential recoveries from the additional lawsuits. The final outcome of these matters cannot be determined at this time; however, no material impact on Southern Company's net income is expected.
On-site dry spent fuel storage facilities are operational at all three plantsPlant Vogtle Units 3 and can be expanded to accommodate spent fuel through the expected life of each plant.
FERC Matters
Market-Based Rate Authority
The traditional electric operating companies and Southern Power have authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to4.
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Southern Company and Subsidiary Companies 20162019 Annual Report


further address market power concerns. The traditional electric operating companies and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their responseAmendments to the Vogtle Joint Ownership Agreements
In connection with the FERC.
On December 9, 2016,vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the traditional electric operating companiesother Vogtle Owners and SouthernMEAG Power's wholly-owned subsidiaries MEAG Power filed an amendmentSPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to their market-based rate tariff that proposedtake certain changesactions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the energy auction, as well as several non-tariff changes.Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 2, 2017,18, 2019, Georgia Power, the FERC issued an order accepting all such changes subjectother Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to an additional condition of cost-based price caps for certain sales outsidethe Vogtle Joint Ownership Agreements to implement the provisions of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The traditional electric operating companies and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,
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$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.
The ultimate outcome of these matters cannot be determined at this time.
Southern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
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(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 2019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
AtInfrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure. In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2016,2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential
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variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas midstream operations wasdelivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Rate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in three gastwo significant pipeline construction projects with expected capital expenditures of approximately $780 million.within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served. One
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of these projects1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approvalapproval.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in August 2016.2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The remaining projects are pendingoperator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval,approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.
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Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to occurbe completed by November 2021. The second phase would include the remaining route in 2017.Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was no impairment as of December 31, 2019.
See Notes 3 and 7 to the financial statements under "Guarantees" and "Southern Company GasEquity Method Investments," respectively, for additional information on these pipeline projects.
Southern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and
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from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Consolidated Income Taxes
On behalf of the Registrants, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect each Registrant's ability to utilize certain tax credits. See "Tax Credits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 10 to the financial statements for additional information.
Federal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
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Southern Company and Subsidiary Companies 2019 Annual Report

Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows for the Registrants as follows:
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Cash flows resulting from bonus depreciation for Southern Power would also be impacted by Southern Power's use of tax equity partnerships.
See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Regulatory Matters
Alabama Power
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted cost of equity (WCE) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Retail rates remain unchanged when the WCE ranges between 5.75% and 6.21% with an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCE adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. If Alabama Power's actual retail return is above the allowed WCE range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCE range.
On December 1, 2016, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2017. The Rate RSE adjustment was an increase of 4.48%, or $245 million annually, effective January 1, 2017 and includes the performance based adder of 0.07%. Under the terms of Rate RSE, the maximum increase for 2018 cannot exceed 3.52%.
As of December 31, 2016, the 2016 retail return exceeded the allowed WCE range; therefore, Alabama Power established a $73 million Rate RSE refund liability. In accordance with an order issued on February 14, 2017 by the Alabama PSC, Alabama Power was directed to apply the full amount of the refund to reduce the under recovered balance of Rate CNP PPA.
Rate CNP PPA
Alabama Power's retail rates, approved by the Alabama PSC, provide for adjustments to recognize the placing of new generating facilities into retail service under Rate CNP. Alabama Power may also recover retail costs associated with certificated PPAs under Rate CNP PPA. On March 8, 2016, the Alabama PSC issued a consent order that Alabama Power leave in effect the current Rate CNP PPA factor for billings for the period April 1, 2016 through March 31, 2017. No adjustment to Rate CNP PPA is expected in 2017. As of December 31, 2016 and 2015, Alabama Power had an under recovered certificated PPA balance of $142 million and $99 million, respectively, which is included in other regulatory assets, deferred in the balance sheet.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, Alabama Power was authorized to eliminate the under recovered balance in Rate CNP PPA at December 31, 2016, which totaled approximately $142 million. As discussed herein under "Rate RSE," Alabama Power will utilize the full amount of its $73 million Rate RSE refund liability to reduce the amount of the Rate CNP PPA under recovery and will reclassify the remaining $69 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama
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Power's next depreciation study, which is expected to occur within the next three to five years. Alabama Power's current depreciation study became effective January 1, 2017.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factorfactors that isare calculated annually.and submitted to the Alabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in compliance relatedRate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On December 6, 2016, the Alabama PSC issued a consent order thatNovember 27, 2019, Alabama Power leave in effect for 2017 the factorssubmitted calculations associated with Alabama Power's compliance costsits cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the year 2016. As stated in the consent order, any under-collected amount for prior years will be deemed recovered before the recoverybilling month of any current year amounts. Any under recovered amounts associated with 2017 will be reflected in the 2018 filing.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, Alabama Power is authorized to classify any under recovered balance in Rate CNP Compliance up to approximately $36 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur within the next three to five years. Alabama Power's current depreciation study became effective January 1, 2017.2020.
Rate ECR
Alabama Power has established energy cost recovery rates underRate ECR recovers Alabama Power's Rate ECR as approved by the Alabama PSC. Rates areretail energy costs based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed givegives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income but will impact operating cash flows. Currently, theThe Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH. In December 2015, the Alabama PSC issued a consent order that Alabama Power decrease the Rate ECR factor from 2.681 cents per KWH to 2.030 cents per KWH.
On December 6, 2016,3, 2019, the Alabama PSC approved a decrease in Alabama Power'sto Rate ECR factor from 2.0302.353 to 2.0152.160 cents per KWH, equal to 0.15%1.82%, or $8approximately $102 million annually, based upon projected billings, effective January 1, 2017.2020. The rate will returnadjust to 5.910 cents per KWH in 2018January 2021 absent a further order from the Alabama PSC.
At December 31, 2016
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Tax Reform Accounting Order
In May 2018, the Alabama Power's over recovered fuel costs totaled $76 million and $238 million, respectively, and are included in other regulatory liabilities, current. These classifications are based on estimates, which include such factors as weather, generation availability, energy demand, and the price of energy. A change in any of these factors could have a material impact on the timing of any recovery or return of fuel costs.
In accordance withPSC approved an accounting order issued on February 17, 2017 bythat authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power is authorized to classify any under recoveredapply the remaining deferred balance of approximately $39 million to increase the balance in the NDR. See "Rate ECR upNDR" herein and Note 10 to approximately $36 millionthe financial statements under "Current and Deferred Income Taxes" for additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Joint Ownership Agreements" for additional information regarding the joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a separate regulatory asset. The amortizationfour-year acceleration of the newretirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to monitor the status of Mississippi Power's proposed RMP and associated regulatory asset through Rate RSEprocess as well as the proposed transmission and system reliability improvements. Alabama Power will begin concurrently withreview all the effective datefacts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of Alabama Power's next depreciation study, which is expected to occur within the next three to five years. Alabama Power's current depreciation study became effective January 1, 2017.Plant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of
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storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR will enhance Alabama Power's ability to deal withmitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear. No such accruals were recorded or
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in any period presented.other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
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Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. These costs areThe regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
InOn April 2015, as part of its environmental compliance strategy,15, 2019, Alabama Power retired Plant Gorgas Units 68, 9, and 7 (200 MWs). Additionally, in April 2015, Alabama Power ceased using coal at Plant Barry Units 110 and 2 (250 MWs), but such units will remain available on a limited basis with natural gas asreclassified approximately $654 million of the fuel source. In accordance with the joint stipulation entered in connection with a civil enforcement action by the EPA, Alabama Power retired Plant Barry Unit 3 (225 MWs) in August 2015 and it is no longer available for generation. In April 2016, as part of its environmental compliance strategy, Alabama Power ceased using coal at Plant Greene County Units 1 and 2 (300 MWs representing Alabama Power's ownership interest) and began operating Units 1 and 2 solely on natural gas in June 2016 and July 2016, respectively.
In accordance with this accounting order from the Alabama PSC, Alabama Power transferred the unrecovered plant asset balances to a regulatory asset at their respective retirement dates. The regulatory asset will be amortized andassets, which are being recovered through Rate CNP Compliance over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 2 to the financial statements under "Alabama Power" and Note 6 to the financial statements for retirement; therefore, these decisions associated with coal operations had no significant impact on Southern Company's financial statements.additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through an alternate rate plan, which includes traditional base tariffs, Demand-Side Management (DSM) tariffs, the ECCR tariff, and Municipal Franchise Fee (MFF) tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariff. See Note 2 to the financial statements under "Georgia PowerRate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%
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(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC on April 14,in 2016, the 2013 ARP will continuecontinued in effect until December 31, 2019, and Georgia Power will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, Georgia Power and Atlanta Gas Light Company each will retain their respectiveretained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings applicable to each will be shared on a 60/40 basis with their respective customers; thereafter, all merger savings will be retained by customers.
In accordance with the 2013 ARP, theThere were no changes to Georgia PSC approved increases to tariffs effective January 1, 2015 and 2016 as follows: (1)Power's traditional base tariffs, ECCR tariff, rates by approximately $107 million and $49 million, respectively; (2) Environmental Compliance Cost Recovery tariff by approximately $23 million and $75 million, respectively; (3) Demand-Side ManagementDSM tariffs, by approximately $3 millionor MFF tariffs in each year; and (4) Municipal Franchise Fee tariff by approximately $3 million and $13 million, respectively, for a total increase in base revenues of approximately $136 million and $140 million, respectively.2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE iswas set at 10.95% and earnings arewere evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% willwere to be directly refunded to customers, with the remaining one-third retained by Georgia Power. There will be no recoveryOn February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of any earnings shortfall below 10.00% on an actual basis.the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2014,2019 and 2018, Georgia Power's retail ROE exceeded 12.00%, and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia Power refunded to retail customershas reduced regulatory assets by a total of approximately $11$110 million in 2016, as approved by the Georgia PSC on February 18, 2016. In 2015, Georgia Power's retail ROE was within the allowed retail ROE range. In 2016, Georgia Power's retail ROE exceeded 12.00%, and Georgia Power expects to refund a total of approximately $110 million to retail customers,
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approximately $40 million, subject to review and approval by the Georgia PSC. The ultimate outcomeSee "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of this matter cannot be determined at this time.the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Integrated Resource PlanBusiness Activities
On July 28, 2016, the Georgia PSC approved the 2016 IRP including the decertification and retirement of Plant Mitchell Units 3, 4A, and 4B (217 MWs) and Plant Kraft Unit 1 (17 MWs), as well as the decertification of the Intercession City unit (143 MWs total capacity). On August 2, 2016, the Plant Mitchell and Plant Kraft units were retired. On August 31, 2016, Georgia Power sold its 33% ownership interest in the Intercession City unit to Duke Energy Florida, LLC.
Additionally, the Georgia PSC approved Georgia Power's environmental compliance strategy and related expenditures proposed in the 2016 IRP, including measures taken to comply with existing government-imposed environmental mandates, subject to limits on expenditures for Plant McIntosh Unit 1 and Plant Hammond Units 1 through 4.
The Georgia PSC approved the reclassification of the remaining net book value of Plant Mitchell Unit 3 and costs associated with materials and supplies remaining at the unit retirement date to a regulatory asset. Recovery of the unit's net book value will continue through December 31, 2019, as provided in the 2013 ARP. The timing of the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costs associated with materials and supplies remaining at the unit retirement date was deferred for consideration in Georgia Power's 2019 base rate case.
The Georgia PSC also approved the Renewable Energy Development Initiative to procure an additional 1,200 MWs of renewable resources primarily utilizing market-based prices established through a competitive bidding process with expected in-service dates between 2018 and 2021. Additionally, 200 MWs of self-build capacity for use by Georgia Power was approved, as well as consideration for no more than 200 MWs of capacity as part of a renewable commercial and industrial program.
The Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear as an option at a future generation site in Stewart County, Georgia. The timing of cost recovery will be determined by the Georgia PSC in a future base rate case. The ultimate outcome of this matter cannot be determined at this time.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. In December 2015, the Georgia PSC approved Georgia Power's request to lower annual billings by approximately $350 million effective January 1, 2016. On May 17, 2016, the Georgia PSC approved Georgia Power's request to further lower annual billings by approximately $313 million effective June 1, 2016. On December 6, 2016, the Georgia PSC approved the delay of Georgia Power's next fuel case, which was previously scheduled to be filed by February 28, 2017. The Georgia PSC will review Georgia Power's cumulative over or under recovered fuel balance no later than September 1, 2018 and evaluate the need to file a fuel case unless Georgia Power deems it necessary to file a fuel case at an earlier time. Under an Interim Fuel Rider, Georgia Power continues to be allowed to adjust its fuel cost recovery rates prior to the next fuel case if the under recovered fuel balance exceeds $200 million.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon effective January 1, 2016.
Georgia Power's over recovered fuel balance totaled approximately $84 million at December 31, 2016 and is included in over recovered regulatory clause revenues, current. At December 31, 2015, Georgia Power's over recovered fuel balance totaled approximately $116 million, including $10 million in over recovered regulatory clause revenues, current and $106 million in other deferred credits and liabilities.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's revenues or net income, but will affect cash flow.
Storm Damage Recovery
As of December 31, 2016, the balance in Georgia Power's regulatory asset related to storm damage was $206 million. During October 2016, Hurricane Matthew caused significant damage to Georgia Power's transmission and distribution facilities. As of December 31, 2016, Georgia Power had recorded incremental restoration cost related to this hurricane of $121 million, of which approximately $116 million was charged to the storm damage reserve and the remainder was capitalized. Georgia Power is accruing $30 million annually through December 31, 2019, as provided in the 2013 ARP, to the storm damage reserve to cover the operations and maintenance costs of damages from major storms to its transmission and distribution facilities, which is recoverable through base rates. The rate of recovery of storm damage costs after December 31, 2019 is expected to be adjusted in
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Georgia Power's 2019 base rate case. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's financial statements.
Nuclear Construction
In 2008, Georgia Power, acting for itself and as agent for Oglethorpe Power Corporation (OPC), the Municipal Electric Authority of Georgia (MEAG Power), and the City of Dalton, Georgia (Dalton), acting by and through its Board of Water, Light, and Sinking Fund Commissioners, doing business as Dalton Utilities (collectively, Vogtle Owners), entered into an agreement with a consortium consisting of Westinghouse and Stone & Webster, Inc., which was subsequently acquired by Westinghouse and changed its name to WECTEC Global Project Services Inc. (WECTEC) (Westinghouse and WECTEC, collectively, Contractor), pursuant to which the Contractor agreed to design, engineer, procure, construct, and test two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities at Plant Vogtle (Vogtle 3 and 4 Agreement).
Under the terms of the Vogtle 3 and 4 Agreement, the Vogtle Owners agreed to pay a purchase price subject to certain price escalations and adjustments, including fixed escalation amounts and index-based adjustments, as well as adjustments for change orders, and performance bonuses for early completion and unit performance. The Vogtle 3 and 4 Agreement also provides for liquidated damages upon the Contractor's failure to fulfill the schedule and performance guarantees, subject to an aggregate cap of 10% of the contract price, or approximately $920 million to $930 million. In addition, the Vogtle 3 and 4 Agreement provides for limited cost sharing by the Vogtle Owners for Contractor costs under certain conditions (which Georgia Power has not been notified have occurred) with maximum additional capital costs under this provision attributable to Georgia Power (based on Georgia Power's ownership interest) of approximately $114 million. Each Vogtle Owner is severally (and not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to the Contractor under the Vogtle 3 and 4 Agreement. Georgia Power's proportionate share is 45.7%. In the event of certain credit rating downgrades of any Vogtle Owner, such Vogtle Owner will be required to provide a letter of credit or other credit enhancement.
Certain obligations of Westinghouse have been guaranteed by Toshiba Corporation (Toshiba), Westinghouse's parent company. In the event of certain credit rating downgrades of Toshiba, Westinghouse is required to provide letters of credit or other credit enhancement. In December 2015, Toshiba experienced credit rating downgrades and Westinghouse provided the Vogtle Owners with $920 million of letters of credit. These letters of credit remain in place in accordance with the terms of the Vogtle 3 and 4 Agreement.
On February 14, 2017, Toshiba announced preliminary earnings results for the period ended December 31, 2016, which included a substantial goodwill impairment charge at Westinghouse attributed to increased cost estimates to complete its U.S. nuclear projects, including Plant Vogtle Units 3 and 4. Toshiba also warned that it will likely be in a negative equity position as a result of the charges. At the same time, Toshiba reaffirmed its commitment to its U.S. nuclear projects with implementation of management changes and increased oversight. An inability or failure by the Contractor to perform its obligations under the Vogtle 3 and 4 Agreement could have a material impact on the construction of Plant Vogtle Units 3 and 4.
Under the terms of the Vogtle 3 and 4 Agreement, the Contractor does not have a right to terminate the Vogtle 3 and 4 Agreement for convenience. The Contractor may terminate the Vogtle 3 and 4 Agreement under certain circumstances, including certain Vogtle Owner suspension or delays of work, action by a governmental authority to permanently stop work, certain breaches of the Vogtle 3 and 4 Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. In the event of an abandonment of work by the Contractor, the maximum liability of the Contractor under the Vogtle 3 and 4 Agreement is increased significantly, but remains subject to limitations. The Vogtle Owners may terminate the Vogtle 3 and 4 Agreement at any time for convenience, provided that the Vogtle Owners will be required to pay certain termination costs.
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for nuclear construction projects certified by the Georgia PSC. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff by including the related CWIP accounts in rate base during the construction period. The Georgia PSC approved an NCCR tariff of $368 million for 2014, as well as increases to the NCCR tariff of approximately $27 million and $19 million effective January 1, 2015 and 2016, respectively.
Georgia Power is required to file semi-annual Vogtle Construction Monitoring (VCM) reports with the Georgia PSC by February 28 and August 31 each year. In accordance with the 2009 certification order, Georgia Power requested amendments to the Plant Vogtle Units 3 and 4 certificate in both the February 2013 (eighth VCM) and February 2015 (twelfth VCM) filings, when projected construction capital costs to be borne by Georgia Power increased by 5% above the certified costs and estimated in-service dates were extended. In October 2013, the Georgia PSC approved a stipulation (2013 Stipulation) between Georgia Power and the Georgia PSC Staff to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate until the completion of
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Plant Vogtle Unit 3 or earlier if deemed appropriate by the Georgia PSC and Georgia Power. In April 2015, the Georgia PSC recognized that the certified cost and the 2013 Stipulation did not constitute a cost recovery cap and deemed the amendment requested in the February 2015 filing unnecessary and withdrawn until the completion of construction of Plant Vogtle Unit 3 consistent with the 2013 Stipulation.
On December 31, 2015, Westinghouse and the Vogtle Owners entered into a definitive settlement agreement (Contractor Settlement Agreement) to resolve disputes between the Vogtle Owners and the Contractor under the Vogtle 3 and 4 Agreement, including litigation that was pending in the U.S. District Court for the Southern District of Georgia (Vogtle Construction Litigation). Effective December 31, 2015, Georgia Power, acting for itself and as agent for the other Vogtle Owners, and the Contractor entered into an amendment to the Vogtle 3 and 4 Agreement to implement the Contractor Settlement Agreement. The Contractor Settlement Agreement and the related amendment to the Vogtle 3 and 4 Agreement (i) restrict the Contractor's ability to seek further increases in the contract price by clarifying and limiting the circumstances that constitute nuclear regulatory changes in law; (ii) provide for enhanced dispute resolution procedures; (iii) revise the guaranteed substantial completion dates to June 30, 2019 for Unit 3 and June 30, 2020 for Unit 4; (iv) provide that delay liquidated damages will commence if the nuclear fuel loading date for each unit does not occur by December 31, 2018 for Unit 3 and December 31, 2019 for Unit 4; and (v) provide that Georgia Power, based on its ownership interest, will pay to the Contractor and capitalize to the project cost approximately $350 million, of which approximately $263 million had been paid as of December 31, 2016. In addition, the Contractor Settlement Agreement provides for the resolution of other open existing items relating to the scope of the project under the Vogtle 3 and 4 Agreement, including cyber security, for which costs are reflected in Georgia Power's current in-service forecast of $5.440 billion. Further, as part of the settlement and Westinghouse's acquisition of WECTEC: (i) Westinghouse engaged Fluor Enterprises, Inc., a subsidiary of Fluor Corporation, as a new construction subcontractor and (ii) the Vogtle Owners, Chicago Bridge & Iron Co, N.V., and The Shaw Group Inc. entered into mutual releases of any and all claims arising out of events or circumstances in connection with the construction of Plant Vogtle Units 3 and 4 that occurred on or before the date of the Contractor Settlement Agreement. On January 5, 2016, the Vogtle Construction Litigation was dismissed with prejudice.
On December 20, 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving the following prudence matters: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report will be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement is reasonable and prudent and none of the amounts paid or to be paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) financing costs on verified and approved capital costs will be deemed prudent provided they are incurred prior to December 31, 2019 and December 31, 2020 for Plant Vogtle Units 3 and 4, respectively; and (iv) (a) the in-service capital cost forecast will be adjusted to $5.680 billion (Revised Forecast), which includes a contingency of $240 million above Georgia Power's current forecast of $5.440 billion, (b) capital costs incurred up to the Revised Forecast will be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, and (c) Georgia Power would have the burden to show that any capital costs above the Revised Forecast are reasonable and prudent. Under the terms of the Vogtle Cost Settlement Agreement, the certified in-service capital cost for purposes of calculating the NCCR tariff will remain at $4.418 billion. Construction capital costs above $4.418 billion will accrue AFUDC through the date each unit is placed in service. The ROE used to calculate the NCCR tariff was reduced from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016. For purposes of the AFUDC calculation, the ROE on costs between $4.418 billion and $5.440 billion will also be 10.00% and the ROE on any amounts above $5.440 billion would be Georgia Power's average cost of long-term debt. If the Georgia PSC adjusts Georgia Power's ROE rate setting point in a rate case prior to Plant Vogtle Units 3 and 4 being placed into retail rate base, then the ROE for purposes of calculating both the NCCR tariff and AFUDC will likewise be 95 basis points lower than the revised ROE rate setting point. If Plant Vogtle Units 3 and 4 are not placed in service by December 31, 2020, then (i) the ROE for purposes of calculating the NCCR tariff will be reduced an additional 300 basis points, or $8 million per month, and may, at the Georgia PSC's discretion, be accrued to be used for the benefit of customers, until such time as the units are placed in service and (ii) the ROE used to calculate AFUDC will be Georgia Power's average cost of long-term debt.
Under the terms of the Vogtle Cost Settlement Agreement, Plant Vogtle Units 3 and 4 will be placed into retail rate base on December 31, 2020 or when placed in service, whichever is later. The Georgia PSC will determine for retail ratemaking purposes the process of transitioning Plant Vogtle Units 3 and 4 from a construction project to an operating plant no later than Georgia Power's base rate case required to be filed by July 1, 2019.
The Georgia PSC has approved fifteen VCM reports covering the periods through June 30, 2016, including construction capital costs incurred, which through that date totaled $3.7 billion. Georgia Power expects to file the sixteenth VCM report, covering the period from July 1 through December 31, 2016, requesting approval of $222 million of construction capital costs incurred during that period, with the Georgia PSC by February 28, 2017. Georgia Power's CWIP balance for Plant Vogtle Units 3 and 4 was
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approximately $3.9 billion as of December 31, 2016, and Georgia Power had incurred $1.3 billion in financing costs through December 31, 2016.
As of December 31, 2016, Georgia Power had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through a loan guarantee agreement between Georgia Power and the DOE and a multi-advance credit facility among Georgia Power, the DOE, and the FFB. See Note 6 under "DOE Loan Guarantee Borrowings" for additional information, including applicable covenants, events of default, and mandatory prepayment events.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise as construction proceeds. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolution of Inspections, Tests, Analyses, and Acceptance Criteria and the related approvals by the NRC, may arise as construction proceeds, which may result in additional license amendments or require other resolution. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs either to the Vogtle Owners or the Contractor or to both.
In addition to Toshiba's reaffirmation of its commitment, the Contractor provided Georgia Power with revised forecasted in-service dates of December 2019 and September 2020 for Plant Vogtle Units 3 and 4, respectively. Georgia Power is currently reviewing a preliminary summary schedule supporting these dates that ultimately must be reconciled to a detailed integrated project schedule. As construction continues, the risk remains that challenges with Contractor performance including labor productivity, fabrication, delivery, assembly, and installation of plant systems, structures, and components, or other issues could arise and may further impact project schedule and cost. Georgia Power expects the Contractor to employ mitigation efforts and believes the Contractor is responsible for any related costs under the Vogtle 3 and 4 Agreement. Georgia Power estimates its financing costs for Plant Vogtle Units 3 and 4 to be approximately $30 million per month, with total construction period financing costs of approximately $2.5 billion. Additionally, Georgia Power estimates its owner's costs to be approximately $6 million per month, net of delay liquidated damages.
The revised forecasted in-service dates are within the timeframe contemplated in the Vogtle Cost Settlement Agreement and would enable both units to qualify for production tax credits the IRS has allocated to each of Plant Vogtle Units 3 and 4, which require the applicable unit to be placed in service before 2021. The net present value of the production tax credits is estimated at approximately $400 million per unit.
Future claims by the Contractor or Georgia Power (on behalf of the Vogtle Owners) could arise throughout construction. These claims may be resolved through formal and informal dispute resolution procedures under the Vogtle 3 and 4 Agreement and, under the enhanced dispute resolution procedures, may be resolved through litigation after the completion of nuclear fuel load for both units.
The ultimate outcome of these matters cannot be determined at this time.
Gulf Power
Retail Base Rate Cases
In 2013, the Florida PSC approved a settlement agreement among Gulf Power and all of the intervenors to Gulf Power's retail base rate case (Gulf Power 2013 Rate Case Settlement Agreement). Under the terms of the Gulf Power 2013 Rate Case Settlement Agreement, Gulf Power (1) increased base rates approximately $35 million and $20 million annually effective January 2014 and 2015, respectively; (2) continued its authorized retail ROE midpoint (10.25%) and range (9.25% – 11.25%); and (3) accrued a return similar to AFUDC on certain transmission system upgrades placed into service after January 2014 through January 1, 2017.
The Gulf Power 2013 Rate Case Settlement Agreement also provides that Gulf Power may reduce depreciation and record a regulatory asset that will be included as an offset to the other cost of removal regulatory liability in an aggregate amount up to $62.5 million from January 2014 through June 2017. In any given month, such depreciation reduction may not exceed the amount necessary for the retail ROE, as reported to the Florida PSC monthly, to reach the midpoint of the authorized retail ROE range then in effect. Recovery of the regulatory asset will occur over a period to be determined by the Florida PSC in the Gulf Power 2016 Rate Case, as defined below. For 2014 and 2015, Gulf Power recognized reductions in depreciation expense of $8.4 million and $20.1 million, respectively. No net reduction in depreciation was recorded by Gulf Power in 2016.
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On October 12, 2016, Gulf Power filed a petition (Gulf Power 2016 Rate Case) with the Florida PSC requesting an annual increase in retail rates and charges of $106.8 million based on the projected test year of January 1, 2017 through December 31, 2017 and a retail ROE of 11% compared to the current retail ROE of 10.25%. The requested increase includes recovery of the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers following the contract expirations at the end of 2015 and May 2016. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, Gulf Power may consider an asset sale. The current book value of Gulf Power's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. The Florida PSC is expected to make a decision on the Gulf Power 2016 Rate Case in the second quarter 2017. Gulf Power has requested that the increase in base rates, if approved by the Florida PSC, become effective in July 2017. The ultimate outcome of this matter cannot be determined at this time.
Southern Company Gas
Natural Gas Cost Recovery
Southern Company Gas has established natural gas cost recovery rates that are approved by the applicable state regulatory agencies in the states in which it serves. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's revenues or net income, but will affect cash flow.
Regulatory Infrastructure Programs
Six of Southern Company Gas' seven natural gas distribution utilities are involved in ongoing capital projects associated with infrastructure improvement programs that have been previously approved by their applicable state regulatory agencies and provide an appropriate return on invested capital. These infrastructure improvement programs are designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. Initial program lengths range from four to 10 years, with the longest set to expire in 2025.
On February 21, 2017, the Georgia PSC approved a rate adjustment mechanism for Atlanta Gas Light that included the 2017 capital investment associated with a four-year extension of one of its existing infrastructure programs, with a total additional investment of $177 million through 2020. In addition, Elizabethtown Gas currently has a proposed infrastructure improvement program pending approval by the New Jersey Board of Public Utilities requesting to invest more than $1.1 billion through 2027.
The ultimate outcome of these matters cannot be determined at this time.
Integrated Coal Gasification Combined Cycle
Kemper IGCC Overview
The Kemper IGCC utilizes IGCC technology with an expected output capacity of 582 MWs. The Kemper IGCC is fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper IGCC. The mine, operated by North American Coal Corporation, started commercial operation in 2013. In connection with the Kemper IGCC, Mississippi Power constructed and plans to operate approximately 61 miles of CO2 pipeline infrastructure for the transport of captured CO2 for use in enhanced oil recovery.
Kemper IGCC Schedule and Cost Estimate
In 2012, the Mississippi PSC issued the 2012 MPSC CPCN Order, a detailed order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper IGCC. The certificated cost estimate of the Kemper IGCC included in the 2012 MPSC CPCN Order was $2.4 billion, net of $245 million of grants awarded to the Kemper IGCC project by the DOE under the Clean Coal Power Initiative Round 2 (Initial DOE Grants) and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, and AFUDC related to the Kemper IGCC. The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper IGCC was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper IGCC in service in August 2014. The remainder of the plant, including the gasifiers and the gas clean-up facilities, represents first-of-a-kind technology. The initial production of syngas began on July 14, 2016 for gasifier "B" and on September 13, 2016 for gasifier "A." Mississippi Power achieved integrated operation of both gasifiers on January 29, 2017, including the production of electricity from syngas in both combustion turbines. Mississippi Power subsequently completed a brief outage to repair and make modifications to further improve the plant's ability to achieve sustained operations sufficient to support placing the plant in service for customers. Efforts to reach sustained operation of both gasifiers and production of electricity from syngas in both combustion turbines are in process. The plant has produced and captured CO2, and has produced sulfuric acid and ammonia, all of acceptable quality under
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the related off-take agreements. On February 20, 2017, Mississippi Power determined gasifier "B," which has been producing syngas over 60% of the time since early November 2016, requires an outage to remove ash deposits from its ash removal system. Gasifier "A" and combustion turbine "A" are expected to remain in operation, producing electricity from syngas, as well as producing chemical by-products. As a result, Mississippi Power currently expects the remainder of the Kemper IGCC, including both gasifiers, will be placed in service by mid-March 2017.
Mississippi Power's Kemper IGCC 2010 project estimate, current cost estimate (which includes the impacts of the Mississippi Supreme Court's (Court) decision discussed herein under "Rate Recovery of Kemper IGCC Costs2013 MPSC Rate Order"), and actual costs incurred as of December 31, 2016, all of which include 100% of the costs for the Kemper IGCC, are as follows:
Cost Category
2010
Project Estimate(a)
 
Current Cost Estimate(b)
 Actual Costs
 (in billions)
Plant Subject to Cost Cap(c)(e)
$2.40
 $5.64
 $5.44
Lignite Mine and Equipment0.21
 0.23
 0.23
CO2 Pipeline Facilities
0.14
 0.11
 0.11
AFUDC(d)
0.17
 0.79
 0.75
Combined Cycle and Related Assets Placed in
Service – Incremental(e)

 0.04
 0.04
General Exceptions0.05
 0.10
 0.09
Deferred Costs(e)

 0.22
 0.21
Additional DOE Grants(f)

 (0.14) (0.14)
Total Kemper IGCC(g)
$2.97
 $6.99
 $6.73
(a)
The 2010 Project Estimate is the certificated cost estimate adjusted to include the certificated estimate for the CO2 pipeline facilities approved in 2011 by the Mississippi PSC, as well as the lignite mine and equipment, AFUDC, and general exceptions.
(b)Amounts in the Current Cost Estimate include certain estimated post-in-service costs which are expected to be subject to the cost cap.
(c)
The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, net of the Initial DOE Grants and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, AFUDC, and certain general exceptions, including change of law, force majeure, and beneficial capital (which exists when Mississippi Power demonstrates that the purpose and effect of the construction cost increase is to produce efficiencies that will result in a neutral or favorable effect on customers relative to the original proposal for the CPCN) (Cost Cap Exceptions). The Current Cost Estimate and the Actual Costs include non-incremental operating and maintenance costs related to the combined cycle and associated common facilities placed in service in August 2014 that are subject to the $2.88 billion cost cap and exclude post-in-service costs for the lignite mine. See "Rate Recovery of Kemper IGCC Costs2013 MPSC Rate Order" herein for additional information.
(d)
Mississippi Power's 2010 Project Estimate included recovery of financing costs during construction rather than the accrual of AFUDC. This approach was not approved by the Mississippi PSC as described in "Rate Recovery of Kemper IGCC Costs2013 MPSC Rate Order." The Current Cost Estimate also reflects the impact of a settlement agreement with the wholesale customers for cost-based rates under FERC's jurisdiction.
(e)
Non-capital Kemper IGCC-related costs incurred during construction were initially deferred as regulatory assets. Some of these costs are now included in rates and are being recognized through income; however, such costs continue to be included in the Current Cost Estimate and the Actual Costs at December 31, 2016. The wholesale portion of debt carrying costs, whether deferred or recognized through income, is not included in the Current Cost Estimate and the Actual Costs at December 31, 2016. See "Rate Recovery of Kemper IGCC CostsRegulatory Assets and Liabilities" herein for additional information.
(f)On April 8, 2016, Mississippi Power received approximately $137 million in additional grants from the DOE for the Kemper IGCC (Additional DOE Grants), which are expected to be used to reduce future rate impacts for customers.
(g)The Current Cost Estimate and the Actual Costs include $2.76 billion that will not be recovered for costs above the cost cap, $0.83 billion of investment costs included in current rates for the combined cycle and related assets in service, and $0.08 billion of costs that were previously expensed for the combined cycle and related assets in service. The Current Cost Estimate and the Actual Costs exclude $0.25 billion of costs not included in current rates for post-June 2013 mine operations, the lignite fuel inventory, and the nitrogen plant capital lease, which will be included in the 2017 Rate Case to be filed by June 3, 2017. See Note 6 under "Capital Leases" and "Rate Recovery of Kemper IGCC Costs – 2017 Rate Case" herein for additional information.
Of the total costs, including post-in-service costs for the lignite mine, incurred as of December 31, 2016, $3.67 billion was included in property, plant, and equipment (which is net of the Initial DOE Grants, the Additional DOE Grants, and estimated probable losses of $2.84 billion), $6 million in other property and investments, $75 million in fossil fuel stock, $47 million in materials and supplies, $29 million in other regulatory assets, current, $172 million in other regulatory assets, deferred, $3 million in other current assets, and $14 million in other deferred charges and assets in the balance sheet.
Mississippi Power does not intend to seek rate recovery for any costs related to the construction of the Kemper IGCC that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. Southern Company recorded pre-
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tax charges to income for revisions to the cost estimate of $348 million ($215 million after tax), $365 million ($226 million after tax), and $868 million ($536 million after tax) in 2016, 2015, and 2014, respectively. Since 2013, in the aggregate, Southern Company has incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016. The increases to the cost estimate in 2016 primarily reflect $186 million for the extension of the Kemper IGCC's projected in-service date from August 31, 2016 to March 15, 2017 and $162 million for increased efforts related to operational readiness and challenges in start-up and commissioning activities, including the cost of repairs and modifications to both gasifiers, mechanical improvements to coal feed and ash management systems, and outage work, as well as certain post-in-service costs expected to be subject to the cost cap.
In addition to the current construction cost estimate, Mississippi Power is identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap.
Any extension of the in-service date beyond mid-March 2017 is currently estimated to result in additional base costs of approximately $25 million to $35 million per month, which includes maintaining necessary levels of start-up labor, materials, and fuel, as well as operational resources required to execute start-up and commissioning activities. Additional costs may be required for remediation of any further equipment and/or design issues identified. Any extension of the in-service date with respect to the Kemper IGCC beyond mid-March 2017 would also increase costs for the Cost Cap Exceptions, which are not subject to the $2.88 billion cost cap established by the Mississippi PSC. These costs include AFUDC, which is currently estimated to total approximately $16 million per month, as well as carrying costs and operating expenses on Kemper IGCC assets placed in service and consulting and legal fees of approximately $3 million per month. For additional information, see "2015 Rate Case" herein.
Further cost increases and/or extensions of the expected in-service date may result from factors including, but not limited to, difficulties integrating the systems required for sustained operations, sustaining nitrogen supply, major equipment failure, unforeseen engineering or design problems including any repairs and/or modifications to systems, and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC). Any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in Southern Company's statements of income and these changes could be material.
Rate Recovery of Kemper IGCC Costs
Given the variety of potential scenarios and the uncertainty of the outcome of future regulatory proceedings with the Mississippi PSC (and any subsequent related legal challenges), the ultimate outcome of the rate recovery matters discussed herein, including the resolution of legal challenges, cannot now be determined but could result in further material charges that could have a material impact on Southern Company's results of operations, financial condition, and liquidity.
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As of December 31, 2016, in addition to the $2.76 billion of costs above the Mississippi PSC's $2.88 billion cost cap that have been recognized as a charge to income, Mississippi Power had incurred approximately $1.99 billion in costs subject to the cost cap and approximately $1.46 billion in Cost Cap Exceptions related to the construction and start-up of the Kemper IGCC that are not included in current rates. These costs primarily relate to the following:
Cost CategoryActual Costs
 (in billions)
Gasifiers and Gas Clean-up Facilities$1.88
Lignite Mine Facility0.31
CO2 Pipeline Facilities
0.11
Combined Cycle and Common Facilities0.16
AFUDC0.69
General exceptions0.07
Plant inventory0.03
Lignite inventory0.08
Regulatory and other deferred assets0.12
Subtotal3.45
Additional DOE Grants(0.14)
Total$3.31
Of these amounts, approximately 29% is related to wholesale and approximately 71% is related to retail, including the 15% portion that was previously contracted to be sold to SMEPA. Mississippi Power and its wholesale customers have generally agreed to the similar regulatory treatment for wholesale tariff purposes as approved by the Mississippi PSC for retail for Kemper IGCC-related costs. See "Termination of Proposed Sale of Undivided Interest" herein for further information.
Prudence
On August 17, 2016, the Mississippi PSC issued an order establishing a discovery docket to manage all filings related to the prudence of the Kemper IGCC. On October 3, 2016, Mississippi Power made a required compliance filing, which included a review and explanation of differences between the Kemper IGCC project estimate set forth in the 2010 CPCN proceedings and the most recent Kemper IGCC project estimate, as well as comparisons of current cost estimates and current expected plant operational parameters to the estimates presented in the 2010 CPCN proceedings for the first five years after the Kemper IGCC is placed in service. Compared to amounts presented in the 2010 CPCN proceedings, operations and maintenance expenses have increased an average of $105 million annually and maintenance capital has increased an average of $44 million annually for the first full five years of operations for the Kemper IGCC. Additionally, while the current estimated operational availability estimates reflect ultimate results similar to those presented in the 2010 CPCN proceedings, the ramp up period for the current estimates reflects a lower starting point and a slower escalation rate. On November 17, 2016, Mississippi Power submitted a supplemental filing to the October 3, 2016 compliance filing to present revised non-fuel operations and maintenance expense projections for the first year after the Kemper IGCC is placed in service. This supplemental filing included approximately $68 million in additional estimated operations and maintenance costs expected to be required to support the operations of the Kemper IGCC during that period. Mississippi Power will not seek recovery of the $68 million in additional estimated costs from customers if incurred.
Mississippi Power expects the Mississippi PSC to address these matters in connection with the 2017 Rate Case.
Economic Viability Analysis
In the fourth quarter 2016, as a part of its Integrated Resource Plan process, the Southern Company system completed its regular annual updated fuel forecast, the 2017 Annual Fuel Forecast. This updated fuel forecast reflected significantly lower long-term estimated costs for natural gas than were previously projected.
As a result of the updated long-term natural gas forecast, as well as the revised operating expense projections reflected in the discovery docket filings discussed above, on February 21, 2017, Mississippi Power filed an updated project economic viability analysis of the Kemper IGCC as required under the 2012 MPSC CPCN Order confirming authorization of the Kemper IGCC. The project economic viability analysis measures the life cycle economics of the Kemper IGCC compared to feasible alternatives, natural gas combined cycle generating units, under a variety of scenarios and considering fuel, operating and capital costs, and
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operating characteristics, as well as federal and state taxes and incentives. The reduction in the projected long-term natural gas prices in the 2017 Annual Fuel Forecast and, to a lesser extent, the increase in the estimated Kemper IGCC operating costs, negatively impact the updated project economic viability analysis.
Mississippi Power expects the Mississippi PSC to address this matter in connection with the 2017 Rate Case.
2017 Accounting Order Request
After the remainder of the plant is placed in service, AFUDC equity of approximately $11 million per month will no longer be recorded in income, and Mississippi Power expects to incur approximately $25 million per month in depreciation, taxes, operations and maintenance expenses, interest expense, and regulatory costs in excess of current rates. Mississippi Power expects to file a request for authority from the Mississippi PSC and the FERC to defer all Kemper IGCC costs incurred after the in-service date that cannot be capitalized, are not included in current rates, and are not required to be charged against earnings as a result of the $2.88 billion cost cap until such time as the Mississippi PSC completes its review and includes the resulting allowable costs in rates. In the event that the Mississippi PSC does not grant Mississippi Power's request, these monthly expenses will be charged to income as incurred and will not be recoverable through rates.
2017 Rate Case
Mississippi Power continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. Mississippi Power also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further herein and under "Prudence," "Lignite Mine and CO2 Pipeline Facilities," "Termination of Proposed Sale of Undivided Interest," "Bonus Depreciation," "Investment Tax Credits," and "Section 174 Research and Experimental Deduction," these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Legislation to authorize a multi-year rate plan and legislation to provide for alternate financing through securitization of up to $1.0 billion of prudently-incurred costs was enacted into law in 2013. Mississippi Power expects to utilize this legislation to securitize prudently-incurred qualifying facility costs in excess of the certificated cost estimate of $2.4 billion. Qualifying facility costs include, but are not limited to, pre-construction costs, construction costs, regulatory costs, and accrued AFUDC. The Court's decision regarding the 2013 MPSC Rate Order did not impact Mississippi Power's ability to utilize alternate financing through securitization or the February 2013 legislation.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, Mississippi Power is developing both a traditional rate case requesting full cost recovery of the amounts not currently in rates and a rate mitigation plan that together represent Mississippi Power's probable filing strategy. Mississippi Power also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both Mississippi Power and the Mississippi Public Utilities Staff (MPUS) (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on Mississippi Power's financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, Mississippi Power intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
Mississippi Power has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
2015 Rate Case
On August 13, 2015, the Mississippi PSC approved Mississippi Power's request for interim rates, which presented an alternative rate proposal (In-Service Asset Proposal) designed to recover Mississippi Power's costs associated with the Kemper IGCC assets that are commercially operational and currently providing service to customers (the transmission facilities, combined cycle,
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natural gas pipeline, and water pipeline) and other related costs. The interim rates were designed to collect approximately $159 million annually and became effective in September 2015, subject to refund and certain other conditions.
On December 3, 2015, the Mississippi PSC issued an order (In-Service Asset Rate Order) adopting in full a stipulation (2015 Stipulation) entered into between Mississippi Power and the MPUS regarding the In-Service Asset Proposal. The In-Service Asset Rate Order provided for retail rate recovery of an annual revenue requirement of approximately $126 million, based on Mississippi Power's actual average capital structure, with a maximum common equity percentage of 49.733%, a 9.225% return on common equity, and actual embedded interest costs. The In-Service Asset Rate Order also included a prudence finding of all costs in the stipulated revenue requirement calculation for the in-service assets. The stipulated revenue requirement excluded the costs of the Kemper IGCC related to the 15% undivided interest that was previously projected to be purchased by SMEPA but reserved Mississippi Power's right to seek recovery in a future proceeding. See "Termination of Proposed Sale of Undivided Interest" herein for additional information. Mississippi Power is required to file the 2017 Rate Case by June 3, 2017.
With implementation of the new rates on December 17, 2015, the interim rates were terminated and, in March 2016, Mississippi Power completed customer refunds of approximately $11 million for the difference between the interim rates collected and the permanent rates.
2013 MPSC Rate Order
In January 2013, Mississippi Power entered into a settlement agreement with the Mississippi PSC that was intended to establish the process for resolving matters regarding cost recovery related to the Kemper IGCC (2013 Settlement Agreement). Under the 2013 Settlement Agreement, Mississippi Power agreed to limit the portion of prudently-incurred Kemper IGCC costs to be included in retail rate base to the $2.4 billion certificated cost estimate, plus the Cost Cap Exceptions, but excluding AFUDC, and any other costs permitted or determined to be excluded from the $2.88 billion cost cap by the Mississippi PSC. In March 2013, the Mississippi PSC issued a rate order approving retail rate increases of 15% effective March 19, 2013 and 3% effective January 1, 2014, which collectively were designed to collect $156 million annually beginning in 2014 (2013 MPSC Rate Order) to be used to mitigate customer rate impacts after the Kemper IGCC is placed in service, based on a mirror CWIP methodology (Mirror CWIP rate).
On February 12, 2015, the Court reversed the 2013 MPSC Rate Order based on, among other things, its findings that (1) the Mirror CWIP rate treatment was not provided for under the Baseload Act and (2) the Mississippi PSC should have determined the prudence of Kemper IGCC costs before approving rate recovery through the 2013 MPSC Rate Order. The Court also found the 2013 Settlement Agreement unenforceable due to a lack of public notice for the related proceedings. On July 7, 2015, the Mississippi PSC ordered that the Mirror CWIP rate be terminated effective July 20, 2015 and required the fourth quarter 2015 refund of the $342 million collected under the 2013 MPSC Rate Order, along with associated carrying costs of $29 million. The Court's decision did not impact the 2012 MPSC CPCN Order or the February 2013 legislation described above.
Because the 2013 MPSC Rate Order did not provide for the inclusion of CWIP in rate base as permitted by the Baseload Act, Mississippi Power continues to record AFUDC on the Kemper IGCC. Through December 31, 2016, AFUDC recorded since the original May 2014 estimated in-service date for the Kemper IGCC has totaled $398 million, which will continue to accrue at approximately $16 million per month until the remainder of the plant is placed in service. Mississippi Power has not recorded any AFUDC on Kemper IGCC costs in excess of the $2.88 billion cost cap, except for Cost Cap Exception amounts.
2012 MPSC CPCN Order
The 2012 MPSC CPCN Order included provisions relating to both Mississippi Power's recovery of financing costs during the course of construction of the Kemper IGCC and Mississippi Power's recovery of costs following the date the Kemper IGCC is placed in service. With respect to recovery of costs following the in-service date of the Kemper IGCC, the 2012 MPSC CPCN Order provided for the establishment of operational cost and revenue parameters including availability factor, heat rate, lignite heat content, and chemical revenue based upon assumptions in Mississippi Power's petition for the CPCN. Mississippi Power expects the Mississippi PSC to apply operational parameters in connection with the 2017 Rate Case and future proceedings related to the operation of the Kemper IGCC. To the extent the Mississippi PSC determines the Kemper IGCC does not meet the operational parameters ultimately adopted by the Mississippi PSC or Mississippi Power incurs additional costs to satisfy such parameters, there could be a material adverse impact on the financial statements. See "Prudence" herein for additional information.
Regulatory Assets and Liabilities
Consistent with the treatment of non-capital costs incurred during the pre-construction period, the Mississippi PSC issued an accounting order in 2011 granting Mississippi Power the authority to defer all non-capital Kemper IGCC-related costs to a
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regulatory asset through the in-service date, subject to review of such costs by the Mississippi PSC. Such costs include, but are not limited to, carrying costs on Kemper IGCC assets currently placed in service, costs associated with Mississippi PSC and MPUS consultants, prudence costs, legal fees, and operating expenses associated with assets placed in service.
In August 2014, Mississippi Power requested confirmation by the Mississippi PSC of Mississippi Power's authority to defer all operating expenses associated with the operation of the combined cycle subject to review of such costs by the Mississippi PSC. In addition, Mississippi Power is authorized to accrue carrying costs on the unamortized balance of such regulatory assets at a rate and in a manner to be determined by the Mississippi PSC in future cost recovery mechanism proceedings. Beginning in the third quarter 2015 and the second quarter 2016, in connection with the implementation of retail and wholesale rates, respectively, Mississippi Power began expensing certain ongoing project costs and certain retail debt carrying costs (associated with assets placed in service and other non-CWIP accounts) that previously were deferred as regulatory assets and began amortizing certain regulatory assets associated with assets placed in service and consulting and legal fees. The amortization periods for these regulatory assets vary from two years to 10 years as set forth in the In-Service Asset Rate Order and the settlement agreement with wholesale customers. As of December 31, 2016, the balance associated with these regulatory assets was $97 million, of which $29 million is included in current assets. Other regulatory assets associated with the remainder of the Kemper IGCC totaled $104 million as of December 31, 2016. The amortization period for these assets is expected to be determined by the Mississippi PSC in the 2017 Rate Case.
The In-Service Asset Rate Order requires Mississippi Power to submit an annual true-up calculation of its actual cost of capital, compared to the stipulated total cost of capital, with the first occurring as of May 31, 2016. At December 31, 2016, Mississippi Power's related regulatory liability included in its balance sheet totaled approximately $7 million. See "2015 Rate Case" herein for additional information.
Lignite Mine and CO2 Pipeline Facilities
In conjunction with the Kemper IGCC, Mississippi Power owns the lignite mine and equipment and has acquired and will continue to acquire mineral reserves located around the Kemper IGCC site. The mine started commercial operation in June 2013.
In 2010, Mississippi Power executed a 40-year management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is operating and managing the mining operations. The contract with Liberty Fuels is effective through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. In addition to the obligation to fund the reclamation activities, Mississippi Power currently provides working capital support to Liberty Fuels through cash advances for capital purchases, payroll, and other operating expenses.
In addition, Mississippi Power has constructed and will operate the CO2 pipeline for the planned transport of captured CO2 for use in enhanced oil recovery. Mississippi Power entered into agreements with Denbury Onshore (Denbury) and Treetop Midstream Services, LLC (Treetop), pursuant to which Denbury would purchase 70% of the CO2 captured from the Kemper IGCC and Treetop would purchase 30% of the CO2 captured from the Kemper IGCC. On June 3, 2016, Mississippi Power cancelled its contract with Treetop and amended its contract with Denbury to reflect, among other things, Denbury's agreement to purchase 100% of the CO2 captured from the Kemper IGCC, an initial contract term of 16 years, and termination rights if Mississippi Power has not satisfied its contractual obligation to deliver captured CO2 by July 1, 2017, in addition to Denbury's existing termination rights in the event of a change in law, force majeure, or an event of default by Mississippi Power. Any termination or material modification of the agreement with Denbury could impact the operations of the Kemper IGCC and result in a material reduction in Mississippi Power's revenues to the extent Mississippi Power is not able to enter into other similar contractual arrangements or otherwise sequester the CO2 produced. Additionally, sustained oil price reductions could result in significantly lower revenues than Mississippi Power originally forecasted to be available to offset customer rate impacts, which could have a material impact on Mississippi Power's financial statements.
The ultimate outcome of these matters cannot be determined at this time.
Termination of Proposed Sale of Undivided Interest
In 2010 and as amended in 2012, Mississippi Power and SMEPA entered into an agreement whereby SMEPA agreed to purchase a 15% undivided interest in the Kemper IGCC (15% Undivided Interest). On May 20, 2015, SMEPA notified Mississippi Power of its termination of the agreement. Mississippi Power previously received a total of $275 million of deposits from SMEPA that were required to be returned to SMEPA with interest. On June 3, 2015, Southern Company, pursuant to its guarantee obligation, returned approximately $301 million to SMEPA. Subsequently, Mississippi Power issued a promissory note in the aggregate principal amount of approximately $301 million to Southern Company, which matures on December 1, 2017.
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Litigation
On April 26, 2016, a complaint against Mississippi Power was filed in Harrison County Circuit Court (Circuit Court) by Biloxi Freezing & Processing Inc., Gulfside Casino Partnership, and John Carlton Dean, which was amended and refiled on July 11, 2016 to include, among other things, Southern Company as a defendant. On August 12, 2016, Southern Company and Mississippi Power removed the case to the U.S. District Court for the Southern District of Mississippi. The plaintiffs filed a request to remand the case back to state court, which was granted on November 17, 2016. The individual plaintiff, John Carlton Dean, alleges that Mississippi Power and Southern Company violated the Mississippi Unfair Trade Practices Act. All plaintiffs have alleged that Mississippi Power and Southern Company concealed, falsely represented, and failed to fully disclose important facts concerning the cost and schedule of the Kemper IGCC and that these alleged breaches have unjustly enriched Mississippi Power and Southern Company. The plaintiffs seek unspecified actual damages and punitive damages; ask the Circuit Court to appoint a receiver to oversee, operate, manage, and otherwise control all affairs relating to the Kemper IGCC; ask the Circuit Court to revoke any licenses or certificates authorizing Mississippi Power or Southern Company to engage in any business related to the Kemper IGCC in Mississippi; and seek attorney's fees, costs, and interest. The plaintiffs also seek an injunction to prevent any Kemper IGCC costs from being charged to customers through electric rates. On December 7, 2016, Southern Company and Mississippi Power filed motions to dismiss.
On June 9, 2016, Treetop, Greenleaf, Tenrgys, LLC, Tellus Energy, LLC, WCOA, LLC, and Tellus Operating Group filed a complaint against Mississippi Power, Southern Company, and SCS in the state court in Gwinnett County, Georgia. The complaint relates to the cancelled CO2 contract with Treetop and alleges fraudulent misrepresentation, fraudulent concealment, civil conspiracy, and breach of contract on the part of Mississippi Power, Southern Company, and SCS and seeks compensatory damages of $100 million, as well as unspecified punitive damages. Southern Company, Mississippi Power, and SCS have moved to compel arbitration pursuant to the terms of the CO2 contract.
Southern Company believes these legal challenges have no merit; however, an adverse outcome in these proceedings could have an impact on Southern Company's results of operations, financial condition, and liquidity. Southern Company will vigorously defend itself in these matters, and the ultimate outcome of these matters cannot be determined at this time.
Baseload Act
In 2008, the Baseload Act was signed by the Governor of Mississippi. The Baseload Act authorizes, but does not require, the Mississippi PSC to adopt a cost recovery mechanism that includes in retail base rates, prior to and during construction, all or a portion of the prudently-incurred pre-construction and construction costs incurred by a utility in constructing a base load electric generating plant. Prior to the passage of the Baseload Act, such costs would traditionally be recovered only after the plant was placed in service. The Baseload Act also provides for periodic prudence reviews by the Mississippi PSC and prohibits the cancellation of any such generating plant without the approval of the Mississippi PSC. In the event of cancellation of the construction of the plant without approval of the Mississippi PSC, the Baseload Act authorizes the Mississippi PSC to make a public interest determination as to whether and to what extent the utility will be afforded rate recovery for costs incurred in connection with such cancelled generating plant. See "Rate Recovery of Kemper IGCC Costs" herein for additional information.
Bonus Depreciation
In December 2015, the Protecting Americans from Tax Hikes (PATH) Act was signed into law. Bonus depreciation was extended for qualified property placed in service through 2020. The PATH Act allows for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension of bonus depreciation included in the PATH Act is expected to result in approximately $20 million of positive cash flows for the 2016 tax year, which was not all realized in 2016 due to a projected consolidated net operating loss (NOL) for Southern Company. Dependent upon placing the remainder of the Kemper IGCC in service by December 31, 2017, Mississippi Power expects approximately $370 million of positive cash flows from bonus depreciation for the 2017 tax year, which may not all be realized in 2017 due to additional NOL projections for the 2017 tax year. See "Kemper IGCC Schedule and Cost Estimate" herein and Note 5 under "Current and Deferred Income Taxes – Net Operating Loss" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Investment Tax Credits
The IRS allocated $133 million (Phase I) and $279 million (Phase II) of Internal Revenue Code Section 48A tax credits to Mississippi Power in connection with the Kemper IGCC. These tax credits were dependent upon meeting the IRS certification requirements, including an in-service date no later than May 11, 2014 for the Phase I credits and April 19, 2016 for the Phase II credits. In addition, the capture and sequestration (via enhanced oil recovery) of at least 65% of the CO2 produced by the Kemper IGCC during operations in accordance with the Internal Revenue Code was also a requirement of the Phase II credits. As a result
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of schedule extensions for the Kemper IGCC, the Phase I tax credits were recaptured in 2013 and the Phase II tax credits were recaptured in 2015.
Section 174 Research and Experimental Deduction
Southern Company reflected deductions for research and experimental (R&E) expenditures related to the Kemper IGCC in its federal income tax calculations since 2013 and has filed amended federal income tax returns for 2008 through 2013 to also include such deductions. The Kemper IGCC is based on first-of-a-kind technology, and Southern Company believes that a significant portion of the plant costs qualify as deductible R&E expenditures under Internal Revenue Code Section 174. In December 2016, Southern Company and the IRS reached a proposed settlement, subject to approval of the U.S. Congress Joint Committee on Taxation, resolving a methodology for these deductions. Due to the uncertainty related to this tax position, Southern Company had unrecognized tax benefits associated with these R&E deductions totaling approximately $464 million as of December 31, 2016. See Note 5 under "Unrecognized Tax Benefits" for additional information. This matter is expected to be resolved in the next 12 months; however, the ultimate outcome of this matter cannot be determined at this time.
4. JOINT OWNERSHIP AGREEMENTS
Alabama Power owns an undivided interest in Units 1 and 2 at Plant Miller and related facilities jointly with PowerSouth Energy Cooperative, Inc. Georgia Power owns undivided interests in Plants Vogtle, Hatch, Wansley, and Scherer in varying amounts jointly with one or more of the following entities: OPC, MEAG Power, the City of Dalton, Georgia, Florida Power & Light Company, and Jacksonville Electric Authority. In addition, Georgia Power has joint ownership agreements with OPC for the Rocky Mountain facilities. On August 31, 2016, Georgia Power sold its 33% ownership interest in the Intercession City combustion turbine unit to Duke Energy Florida, LLC. Southern Power owns an undivided interest in Plant Stanton Unit A and related facilities jointly with the Orlando Utilities Commission, Kissimmee Utility Authority, and Florida Municipal Power Agency.
At December 31, 2016, Alabama Power's, Georgia Power's, and Southern Power's percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation with the above entities were as follows:
Facility (Type)
Percent
Ownership
 Plant in Service 
Accumulated
Depreciation
 CWIP
   (in millions)
Plant Vogtle (nuclear) Units 1 and 245.7% $3,545
 $2,111
 $74
Plant Hatch (nuclear)50.1
 1,297
 585
 81
Plant Miller (coal) Units 1 and 291.8
 1,657
 587
 23
Plant Scherer (coal) Units 1 and 28.4
 258
 90
 3
Plant Wansley (coal)53.5
 1,046
 308
 12
Rocky Mountain (pumped storage)25.4
 181
 129
 
Plant Stanton (combined cycle) Unit A65.0
 155
 58
 
Georgia Power also owns 45.7% of Plant Vogtle Units 3 and 4, which are currently under construction and had a CWIP balance of approximately $3.9 billion as of December 31, 2016. See Note 3 under "Regulatory MattersGeorgia PowerNuclear Construction" for additional information.
Alabama Power and Georgia Power have contracted to operate and maintain their jointly-owned facilities, except for Rocky Mountain, as agents for their respective co-owners. Southern Power has a service agreement with SCS whereby SCS is responsible for the operation and maintenance of Plant Stanton Unit A. The companies' proportionate share of their plant operating expenses is included in the corresponding operating expenses in the statements of income and each company is responsible for providing its own financing.
Southern Company Gas has a 50% undivided ownership interest with The Williams Companies, Inc. in a 115-mile pipeline facility being constructed in northwest Georgia. The CWIP balance representing Southern Company Gas' share of construction costs was approximately $124 million as of December 31, 2016. Southern Company Gas also has an agreement to lease its 50% undivided ownership in the pipeline facility once it is placed in service, which is currently expected to be later in 2017. Under the lease, Southern Company Gas will receive approximately $26 million annually for an initial term of 25 years. The lessee will be responsible for maintaining the pipeline during the lease term and for providing service to transportation customers under its FERC-regulated tariff.
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5. INCOME TAXES
Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. PowerSecure and Southern Company Gas became participants in the income tax allocation agreement as of May 9, 2016 and July 1, 2016, respectively. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
Current and Deferred Income Taxes
Details of income tax provisions are as follows:
 2016 2015 2014
 (in millions)
Federal —     
Current$1,184
 $(177) $175
Deferred(342) 1,266
 695
 842
 1,089
 870
State —     
Current(108) (33) 93
Deferred217
 138
 14
 109
 105
 107
Total$951
 $1,194
 $977
Net cash payments (refunds) for income taxes in 2016, 2015, and 2014 were $(148) million, $(9) million, and $272 million, respectively.
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The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 2016 2015
 (in millions)
Deferred tax liabilities —   
Accelerated depreciation$15,392
 $12,767
Property basis differences2,708
 1,603
Leveraged lease basis differences314
 308
Employee benefit obligations737
 579
Premium on reacquired debt89
 95
Regulatory assets associated with employee benefit obligations1,584
 1,378
Regulatory assets associated with AROs1,781
 1,422
Other907
 793
Total23,512
 18,945
Deferred tax assets —   
Federal effect of state deferred taxes597
 479
Employee benefit obligations1,868
 1,720
Over recovered fuel clause66
 104
Other property basis differences401
 695
Deferred costs100
 83
ITC carryforward1,974
 770
Federal NOL carryforward1,084
 38
Unbilled revenue92
 111
Other comprehensive losses152
 85
AROs1,732
 1,482
Estimated Loss on Kemper IGCC484
 451
Deferred state tax assets266
 222
Other679
 443
Total9,495
 6,683
Valuation allowance(23) (4)
Total deferred income taxes14,040
 12,266
Portion included in accumulated deferred tax assets(52) (56)
Accumulated deferred income taxes$14,092
 $12,322
The application of bonus depreciation provisions in current tax law significantly increased deferred tax liabilities related to accelerated depreciation.
At December 31, 2016, the tax-related regulatory assets to be recovered from customers were $1.6 billion. These assets are primarily attributable to tax benefits flowed through to customers in prior years, deferred taxes previously recognized at rates lower than the current enacted tax law, and taxes applicable to capitalized interest.
At December 31, 2016, the tax-related regulatory liabilities to be credited to customers were $219 million. These liabilities are primarily attributable to deferred taxes previously recognized at rates higher than the current enacted tax law and to unamortized ITCs.
In accordance with regulatory requirements, deferred federal ITCs for the traditional electric operating companies are amortized over the life of the related property with such amortization normally applied as a credit to reduce depreciation in the statements of income. Credits amortized in this manner amounted to $22 million in 2016, $21 million in 2015, and $22 million in 2014. Southern Power's deferred federal ITCs are amortized to income tax expense over the life of the asset. Credits amortized in this manner amounted to $37 million in 2016, $19 million in 2015, and $11 million in 2014. Also, Southern Power received cash
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related to federal ITCs under the renewable energy incentives of $162 million and $74 million for the years ended December 31, 2015 and 2014, respectively. No cash was received related to these incentives in 2016. Furthermore, the tax basis of the asset is reduced by 50% of the ITCs received, resulting in a net deferred tax asset. Southern Power has elected to recognize the tax benefit of this basis difference as a reduction to income tax expense in the year in which the plant reaches commercial operation. The tax benefit of the related basis differences reduced income tax expense by $173 million in 2016, $54 million in 2015, and $48 million in 2014. See "Unrecognized Tax Benefits" below for further information.
Tax Credit Carryforwards
At December 31, 2016, Southern Company had federal ITC and PTC carryforwards (primarily related to Southern Power) which are expected to result in $1.8 billion of federal income tax benefits. The federal ITC carryforwards begin expiring in 2032 but are expected to be fully utilized by 2022. The PTC carryforwards begin expiring in 2036 but are expected to be fully utilized by 2022. The acquisition of additional renewable projects and carrying back the federal NOL, as well as potential tax reform legislation on existing renewable incentives, could further delay existing tax credit carryforwards. The ultimate outcome of these matters cannot be determined at this time.
Additionally, Southern Company had state ITC carryforwards for the state of Georgia totaling $202 million, which begin expiring in 2020 but are expected to be fully utilized.
Net Operating Loss
At December 31, 2016, Southern Company had a consolidated federal NOL carryforward of $3 billion, of which $2.8 billion is projected for the 2016 tax year. The federal NOL will begin expiring in 2033. However, portions of the NOL are expected to be carried back to prior tax years and forward to future tax years. The ultimate outcome of this matter cannot be determined at this time.
At December 31, 2016, the state NOL carryforwards for Southern Company's subsidiaries were as follows:
JurisdictionNOL CarryforwardsNet State Income Tax Benefit
Tax Year NOL
Begins Expiring
 (in millions) 
Mississippi$3,448
$112
2032
Oklahoma839
31
2036
Georgia685
25
2019
New York229
11
2036
New York City209
12
2036
Florida198
7
2034
Other states146
5
Various
Total$5,754
$203

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Effective Tax Rate
A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 2016 2015 2014
Federal statutory rate35.0 % 35.0 % 35.0 %
State income tax, net of federal deduction2.1
 1.9
 2.3
Employee stock plans dividend deduction(1.2) (1.2) (1.4)
Non-deductible book depreciation0.9
 1.2
 1.4
AFUDC-Equity(2.0) (2.2) (2.9)
ITC basis difference(5.0) (1.5) (1.6)
Federal PTCs(1.2) 
 
Amortization of ITC(0.9) (0.5) (0.5)
Other(0.4) 0.2
 0.2
Effective income tax rate27.3 % 32.9 % 32.5 %
Southern Company's effective tax rate is typically lower than the statutory rate due to employee stock plans' dividend deduction, non-taxable AFUDC equity, and federal income tax benefits from ITCs and PTCs.
On March 30, 2016, the FASB issued ASU 2016-09, which changes the accounting for income taxes for share-based payment award transactions. Entities are required to recognize all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation as income tax expense or benefit in the income statement. The adoption of ASU 2016-09 did not have a material impact on Southern Company's overall effective tax rate. See Note 1 under "Recently Issued Accounting Standards" for additional information.
Unrecognized Tax Benefits
Changes during the year in unrecognized tax benefits were as follows:
 2016 2015 2014
 (in millions)
Unrecognized tax benefits at beginning of year$433
 $170
 $7
Tax positions increase from current periods45
 43
 64
Tax positions increase from prior periods21
 240
 102
Tax positions decrease from prior periods(15) (20) (3)
Balance at end of year$484
 $433
 $170
The tax positions increase from current and prior periods for 2016 and 2015 relate primarily to deductions for R&E expenditures associated with the Kemper IGCC and federal income tax benefits from deferred ITCs. See Note 3 under "Integrated Coal Gasification Combined Cycle" and "Section 174 Research and Experimental Deduction" herein for more information. The tax positions decrease from prior periods for 2016 and 2015 relates to federal income tax benefits from deferred ITCs.
The impact on Southern Company's effective tax rate, if recognized, is as follows:

2016
2015
2014

(in millions)
Tax positions impacting the effective tax rate$20

$10

$10
Tax positions not impacting the effective tax rate464

423

160
Balance of unrecognized tax benefits$484

$433

$170
The tax positions impacting the effective tax rate primarily relate to federal deferred income tax credits and Southern Company's estimate of the uncertainty related to the amount of those benefits. If these tax positions are not able to be recognized due to a federal audit adjustment in the amount that has been estimated, the amount of tax credit carryforwards discussed above would be reduced by approximately $92 million. The tax positions not impacting the effective tax rate for 2016, 2015, and 2014 relate to deductions for R&E expenditures associated with the Kemper IGCC. See "Section 174 Research and Experimental Deduction"
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herein for more information. These amounts are presented on a gross basis without considering the related federal or state income tax impact.
Accrued interest for all tax positions other than the Section 174 R&E deductions was immaterial for all years presented.
Southern Company classifies interest on tax uncertainties as interest expense. Southern Company did not accrue any penalties on uncertain tax positions.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. The settlement of federal and state audits and the U.S. Congress Joint Committee on Taxation approval of the R&E expenditures associated with the Kemper IGCC could impact the balances significantly. At this time, an estimate of the range of reasonably possible outcomes cannot be determined. See "Section 174 Research and Experimental Deduction" herein for more information.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2012. Southern Company has filed its 2013, 2014, and 2015 federal income tax returns and has received partial acceptance letters from the IRS; however, the IRS has not finalized its audits. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for Southern Company's state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2011.
Section 174 Research and Experimental Deduction
Southern Company reflected deductions for R&E expenditures related to the Kemper IGCC in its federal income tax calculations since 2013 and filed amended federal income tax returns for 2008 through 2013 to also include such deductions.
The Kemper IGCC is based on first-of-a-kind technology, and Southern Company believes that a significant portion of the plant costs qualify as deductible R&E expenditures under Internal Revenue Code Section 174. In December 2016, Southern Company and the IRS reached a proposed settlement, subject to approval of the U.S. Congress Joint Committee on Taxation, resolving a methodology for these deductions. Due to the uncertainty related to this tax position, Southern Company had unrecognized tax benefits associated with these R&E deductions totaling approximately $464 million and associated interest of $28 million as of December 31, 2016. This matter is expected to be resolved in the next 12 months; however, the ultimate outcome of this matter cannot be determined at this time. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.
6. FINANCING
Long-Term Debt Payable to an Affiliated Trust
Alabama Power has formed a wholly-owned trust subsidiary for the purpose of issuing preferred securities. The proceeds of the related equity investments and preferred security sales were loaned back to Alabama Power through the issuance of junior subordinated notes totaling $206 million as of December 31, 2016 and 2015, which constitute substantially all of the assets of this trust and are reflected in the balance sheets as long-term debt payable. Alabama Power considers that the mechanisms and obligations relating to the preferred securities issued for its benefit, taken together, constitute a full and unconditional guarantee by it of the trust's payment obligations with respect to these securities. At December 31, 2016 and 2015, trust preferred securities of $200 million were outstanding.
Securities Due Within One Year
A summary of scheduled maturities and redemptions of securities due within one year at December 31 was as follows:
 2016 2015
 (in millions)
Senior notes$1,995
 $1,810
Other long-term debt485
 829
Pollution control revenue bonds(*)
76
 4
Capitalized leases32
 32
Unamortized debt issuance expense(1) (1)
Total$2,587
 $2,674
(*)Includes $40 million of pollution control revenue bonds classified as short-term since they are variable rate demand obligations that are supported by short-term credit facilities; however, the final maturity date is in 2028.
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Maturities through 2021 applicable to total long-term debt are as follows: $2.6 billion in 2017; $3.9 billion in 2018; $3.2 billion in 2019; $1.4 billion in 2020; and $3.1 billion in 2021.
Bank Term Loans
Southern Company and certain of its subsidiaries have entered into various bank term loan agreements. At December 31, 2016, Southern Company, Alabama Power, Gulf Power, Mississippi Power, and Southern Power Company had outstanding bank term loans totaling $400 million, $45 million, $100 million, $1.2 billion, and $380 million, respectively, of which $2.0 billion are reflected in the statements of capitalization as long-term debt and $100 million are reflected in the balance sheet as notes payable. At December 31, 2015, Southern Company, Mississippi Power, and Southern Power Company had outstanding bank term loans totaling $400 million, $900 million, and $400 million, respectively.
In March 2016, Alabama Power entered into three bank term loan agreements with maturity dates of March 2021, in an aggregate principal amount of $45 million, one of which bears interest at 2.38% per annum and two of which bear interest based on three-month LIBOR.
In March 2016, Mississippi Power entered into an unsecured term loan agreement with a syndicate of financial institutions for an aggregate amount of $1.2 billion. Mississippi Power borrowed $900 million in March 2016 under the term loan agreement and the remaining $300 million in October 2016. Mississippi Power used the initial proceeds to repay $900 million in maturing bank loans in March 2016 and the remaining $300 million to repay at maturity Mississippi Power's Series 2011A 2.35% Senior Notes due October 15, 2016. This loan matures on April 1, 2018 and bears interest based on one-month LIBOR.
In May 2016, Gulf Power entered into an 11-month floating rate bank loan bearing interest based on one-month LIBOR. This short-term loan was for $100 million aggregate principal amount and the proceeds were used to repay existing indebtedness and for working capital and other general corporate purposes.
In September 2016, Southern Power Company repaid $80 million of an outstanding $400 million floating rate bank loan and extended the maturity date of the remaining $320 million from September 2016 to September 2018. In addition, Southern Power Company entered into a $60 million aggregate principal amount floating rate bank loan bearing interest based on one-month LIBOR due September 2017. The proceeds were used to repay existing indebtedness and for other general corporate purposes.
The outstanding bank loans as of December 31, 2016 have covenants that limit debt levels to a percentage of total capitalization. The percentage is 70% for Southern Company and 65% for Alabama Power, Gulf Power, Mississippi Power, and Southern Power Company, as defined in the agreements. For purposes of these definitions, debt excludes any long-term debt payable to affiliated trusts, other hybrid securities, and, for Southern Company and Mississippi Power, any securitized debt relating to the securitization of certain costs of the Kemper IGCC. Additionally, for Southern Company and Southern Power Company, for purposes of these definitions, debt excludes any project debt incurred by certain subsidiaries of Southern Power Company to the extent such debt is non-recourse to Southern Power Company and capitalization excludes the capital stock or other equity attributable to such subsidiary. At December 31, 2016, each of Southern Company, Alabama Power, Gulf Power, Mississippi Power, and Southern Power Company was in compliance with its debt limits.
DOE Loan Guarantee Borrowings
Pursuant to the loan guarantee program established under Title XVII of the Energy Policy Act of 2005 (Title XVII Loan Guarantee Program), Georgia Power and the DOE entered into a loan guarantee agreement (Loan Guarantee Agreement) in February 2014, under which the DOE agreed to guarantee the obligations of Georgia Power under a note purchase agreement (FFB Note Purchase Agreement) among the DOE, Georgia Power, and the FFB and a related promissory note (FFB Promissory Note). The FFB Note Purchase Agreement and the FFB Promissory Note provide for a multi-advance term loan facility (FFB Credit Facility), under which Georgia Power may make term loan borrowings through the FFB.
Proceeds of advances made under the FFB Credit Facility are used to reimburse Georgia Power for a portion of certain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under the Title XVII Loan Guarantee Program (Eligible Project Costs). Aggregate borrowings under the FFB Credit Facility may not exceed the lesser of (i) 70% of Eligible Project Costs or (ii) approximately $3.46 billion.
All borrowings under the FFB Credit Facility are full recourse to Georgia Power, and Georgia Power is obligated to reimburse the DOE for any payments the DOE is required to make to the FFB under the guarantee. Georgia Power's reimbursement obligations to the DOE are full recourse and secured by a first priority lien on (i) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. There are no restrictions on Georgia Power's ability to grant liens on other property.
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Southern Company and Subsidiary Companies 2016 Annual Report

Advances may be requested under the FFB Credit Facility on a quarterly basis through 2020. The final maturity date for each advance under the FFB Credit Facility is February 20, 2044. Interest is payable quarterly and principal payments will begin on February 20, 2020. Borrowings under the FFB Credit Facility will bear interest at the applicable U.S. Treasury rate plus a spread equal to 0.375%.
In connection with its entry into the agreements with the DOE and the FFB, Georgia Power incurred issuance costs of approximately $66 million, which are being amortized over the life of the borrowings under the FFB Credit Facility.
In June and December 2016, Georgia Power made borrowings under the FFB Credit Facility in an aggregate principal amount of $300 million and $125 million, respectively. The interest rate applicable to the $300 million principal amount is 2.571% and the interest rate applicable to the $125 million principal amount is 3.142%, both for an interest period that extends to the final maturity date of February 20, 2044.
At December 31, 2016 and 2015, Georgia Power had $2.6 billion and $2.2 billion of borrowings outstanding under the FFB Credit Facility, respectively. Future advances are subject to satisfaction of customary conditions, as well as certification of compliance with the requirements of the Title XVII Loan Guarantee Program, including accuracy of project-related representations and warranties, delivery of updated project-related information, and evidence of compliance with the prevailing wage requirements of the Davis-Bacon Act of 1931, as amended, and certification from the DOE's consulting engineer that proceeds of the advances are used to reimburse Eligible Project Costs.
Under the Loan Guarantee Agreement, Georgia Power is subject to customary borrower affirmative and negative covenants and events of default. In addition, Georgia Power is subject to project-related reporting requirements and other project-specific covenants and events of default.
In the event certain mandatory prepayment events occur, the FFB's commitment to make further advances under the FFB Credit Facility will terminate and Georgia Power will be required to prepay the outstanding principal amount of all borrowings under the FFB Credit Facility over a period of five years (with level principal amortization). Among other things, these mandatory prepayment events include (i) the termination of the Vogtle 3 and 4 Agreement; (ii) cancellation of Plant Vogtle Units 3 and 4 by the Georgia PSC, or by Georgia Power if authorized by the Georgia PSC; and (iii) cost disallowances by the Georgia PSC that could have a material adverse effect on completion of Plant Vogtle Units 3 and 4 or Georgia Power's ability to repay the outstanding borrowings under the FFB Credit Facility. Under certain circumstances, insurance proceeds and any proceeds from an event of taking must be applied to immediately prepay outstanding borrowings under the FFB Credit Facility. Georgia Power also may voluntarily prepay outstanding borrowings under the FFB Credit Facility. Under the FFB Promissory Note, any prepayment (whether mandatory or optional) will be made with a make-whole premium or discount, as applicable.
In connection with any cancellation of Plant Vogtle Units 3 and 4 that results in a mandatory prepayment event, the DOE may elect to continue construction of Plant Vogtle Units 3 and 4. In such an event, the DOE will have the right to assume Georgia Power's rights and obligations under the principal agreements relating to Plant Vogtle Units 3 and 4 and to acquire all or a portion of Georgia Power's ownership interest in Plant Vogtle Units 3 and 4.
Senior Notes
Southern Company and its subsidiaries issued a total of $13.3 billion of senior notes in 2016. Southern Company issued $8.5 billion and its subsidiaries issued a total of $4.8 billion. These amounts include senior notes issued by Southern Company Gas subsequent to the Merger. The proceeds of Southern Company's issuances were used to fund a portion of the consideration for the Merger and related transaction costs and for general corporate purposes. Except as described below, the proceeds of Southern Company's subsidiaries' issuances were used to repay long-term indebtedness, to repay short-term indebtedness, and for other general corporate purposes, including the applicable subsidiaries' continuous construction programs, and, for Southern Power, its growth strategy. Certain of Georgia Power's and Southern Power's issuances were allocated to eligible renewable energy expenditures. The proceeds of Southern Company Gas' issuances were primarily used to repay a $360 million promissory note issued to Southern Company for the purpose of funding a portion of the purchase price for a 50% equity interest in Southern Natural Gas Company, L.L.C. (SNG), to fund the purchase of Piedmont Natural Gas Company, Inc.'s (Piedmont) interest in SouthStar Energy Services, LLC (SouthStar), and to make a voluntary contribution to Southern Company Gas' pension plan. See Note 12 under "Southern CompanyInvestment in Southern Natural Gas" and " – Acquisition of Remaining Interest in SouthStar" for additional information.
At December 31, 2016 and 2015, Southern Company and its subsidiaries had a total of $33.0 billion and $19.1 billion, respectively, of senior notes outstanding. At December 31, 2016 and 2015, Southern Company had a total of $10.3 billion and $2.4 billion, respectively, of senior notes outstanding. These amounts include senior notes due within one year.
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Southern Company and Subsidiary Companies 2016 Annual Report

Subsequent to December 31, 2016, Alabama Power repaid at maturity $200 million aggregate principal amount of its Series 2007A 5.55% Senior Notes due February 1, 2017.
Since Southern Company is a holding company the right of Southern Company and, hence, the right of creditors of Southern Company (including holders of Southern Company senior notes) to participate in any distributionthat owns all of the assetscommon stock of any subsidiary of Southern Company, whether upon liquidation, reorganization or otherwise, is subject to prior claims of creditors and preferred and preference stockholders of such subsidiary.
Junior Subordinated Notes
At December 31, 2016 and 2015, Southern Company had a total of $2.4 billion and $1.0 billion, respectively, of junior subordinated notes outstanding.
In September 2016, Southern Company issued $800 million aggregate principal amount of Series 2016A 5.25% Junior Subordinated Notes due October 1, 2076. The proceeds were used to repay short-term indebtedness that was incurred to repay at maturity $500 million aggregate principal amount of Southern Company's Series 2011A 1.95% Senior Notes due September 1, 2016 and for other general corporate purposes.
In December 2016, Southern Company issued $550 million aggregate principal amount of Series 2016B Junior Subordinated Notes due March 15, 2057, which bear interest at a fixed rate of 5.50% per year up to, but not including, March 15, 2022. From, and including, March 15, 2022, the Series 2016B Junior Subordinated Notes will bear interest at a floating rate based on three-month LIBOR. The proceeds were used for general corporate purposes.
Pollution Control Revenue Bonds
Pollution control revenue bond obligations represent loans to thethree traditional electric operating companies, from public authorities of funds derived from sales by such authorities of revenue bonds issued to finance pollution control and solid waste disposal facilities. In some cases,as well as the pollution control revenue bond obligations represent obligations under installment sales agreements with respect to facilities constructed with the proceeds of revenue bonds issued by public authorities. The traditional electric operating companies had $3.3 billion of outstanding pollution control revenue bond obligations at December 31, 2016 and 2015, which includes pollution control revenue bonds due within one year. The traditional electric operating companies are required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. Proceeds from certain issuances are restricted until qualifying expenditures are incurred.
Plant Daniel Revenue Bonds
In 2011, in connection with Mississippi Power's election under its operating lease of Plant Daniel Units 3 and 4 to purchase the assets, Mississippi Power assumed the obligations of the lessor related to $270 million aggregate principal amount of Mississippi Business Finance Corporation Taxable Revenue Bonds, 7.13% Series 1999A due October 20, 2021, issued for the benefit of the lessor. See "Assets Subject to Lien" herein for additional information.
Gas Facility Revenue Bonds
Pivotal Utility Holdings, Inc., a subsidiaryparent entities of Southern Company Gas, is party to a series of loan agreements with the New Jersey Economic Development AuthorityPower and Brevard County, Florida under which five series of gas facility revenue bonds have been issued with maturities ranging from 2022 to 2033. These revenue bonds are issued by state agencies or counties to investors, and proceeds from the issuance then are loaned to Southern Company Gas. The amount of gas facility revenue bonds outstanding at December 31, 2016 was $200 million.
Other Revenue Bonds
Other revenue bond obligations represent loans to Mississippi Power from a public authority of funds derived from the sale by such authority of revenue bonds issued to finance a portion of the costs of constructing the Kemper IGCC and related facilities.
Mississippi Power had $50 million of such obligations outstanding related to tax-exempt revenue bonds at December 31, 2016 and 2015. Such amounts are reflected in the statements of capitalization as long-term senior notes and debt.
First Mortgage Bonds
Nicor Gas, a subsidiary of Southern Company Gas, had $625 million of first mortgage bonds outstanding at December 31, 2016. These bonds have been issued with maturities ranging from 2019 to 2038. Substantially all of Nicor Gas' properties are subject to the lien of the indenture securing these first mortgage bonds. See "Assets Subject to Lien" herein for additional information.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Capital Leases
Assets acquired under capital leases are recorded in the balance sheets as property, plant, and equipment and the related obligations are classified as long-term debt.
In 2013, Mississippi Power entered into a nitrogen supply agreement for the air separation unit of the Kemper IGCC, which resulted in a capital lease obligation at December 31, 2016 and 2015 of approximately $74 million and $77 million, respectively, with an annual interest rate of 4.9% for both years. Amortization of the capital lease asset for the air separation unit will begin when the Kemper IGCC is placed in service. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.
At December 31, 2016 and 2015, the capitalized lease obligations for Georgia Power's corporate headquarters building were $28 million and $35 million, respectively, with an annual interest rate of 7.9% for both years.
At December 31, 2016 and 2015, Alabama Power had capitalized lease obligations of $4 million and $5 million, respectively, for a natural gas pipeline with an annual interest rate of 6.9%.
At December 31, 2016 and 2015, a subsidiary of Southern Company had capital lease obligations of approximately $29 million and $30 million, respectively, for certain computer equipment including desktops, laptops, servers, printers, and storage devices with annual interest rates that range from 1.4% to 3.4%.
Assets Subject to Lien
Each of Southern Company's subsidiaries is organized as a legal entity, separate and apart from Southern Company and its other subsidiaries. There are no agreements or other arrangements among the Southern Company system companies under which the assets of one company have been pledged or otherwise made available to satisfy obligations of Southern Company or any of its other subsidiaries.
Gulf Power has granted one or more liens on certain of its property in connection with the issuance of certain series of pollution control revenue bonds with an aggregate outstanding principal amount of $41 million as of December 31, 2016.
The revenue bonds assumed in conjunction with Mississippi Power's purchase of Plant Daniel Units 3 and 4 are secured by Plant Daniel Units 3 and 4 and certain related personal property. See "Plant Daniel Revenue Bonds" herein for additional information.
See "DOE Loan Guarantee Borrowings" above for information regarding certain borrowings of Georgia Power that are secured by a first priority lien on (i) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4.
The first mortgage bonds issued by Nicor Gas are secured by substantially all of Nicor Gas' properties. See "First Mortgage Bonds" herein for additional information.
During 2016, in accordance with its overall growth strategy, Southern Power acquired the Mankato project. Under the terms of the remaining 10-year PPA and the 20-year expansion PPA, approximately $408 million of assets, primarily related to property, plant, and equipment, are subject to lien at December 31, 2016. See Note 12 under "Southern Power" for additional information.
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Southern Company and Subsidiary Companies 2016 Annual Report

Bank Credit Arrangements
At December 31, 2016, committed credit arrangements with banks were as follows:
 Expires   Executable Term Loans 
Expires Within
One Year
Company2017 2018 2020 Total Unused 
One
Year
 
Two
Years
 Term Out No Term Out
 (in millions) (in millions) (in millions) (in millions)
Southern Company(a)
$
 $1,000
 $1,250
 $2,250
 $2,250
 $
 $
 $
 $
Alabama Power35
 500
 800
 1,335
 1,335
 
 
 
 35
Georgia Power
 
 1,750
 1,750
 1,732
 
 
 
 
Gulf Power85
 195
 
 280
 280
 45
 
 25
 60
Mississippi Power173
 
 
 173
 150
 
 13
 13
 160
Southern Power Company(b)

 
 600
 600
 522
 
 
 
 
Southern Company Gas(c)
75
 1,925
 
 2,000
 1,949
 
 
 
 75
Other55
 
 
 55
 55
 20
 
 20
 35
Southern Company Consolidated$423
 $3,620
 $4,400
 $8,443
 $8,273
 $65
 $13
 $58
 $365
(a)Represents the Southern Company parent entity.
(b)
Excludes credit agreements (Project Credit Facilities) assumed with the acquisition of certain solar facilities, which were non-recourse to Southern Power Company, the proceeds of which were used to finance project costs related to such solar facilities. See Note 12 under "Southern Power" for additional information. Also excludes a $120 million continuing letter of credit facility entered into by Southern Power in December 2016 for standby letters of credit expiring in 2019. At December 31, 2016, the total amount available under the letter of credit facility was $82 million.
(c)Southern Company Gas, as the parent entity, guarantees the obligations of Southern Company Gas Capital, which is the borrower of $1.3 billion of these arrangements. Southern Company Gas' committed credit arrangements also include $700 million for which Nicor Gas is the borrower and which is restricted for working capital needs of Nicor Gas.
Most of the bank credit arrangements require payment of commitment fees based on the unused portion of the commitments or the maintenance of compensating balances with the banks. Commitment fees average less than 1/4 of 1% for Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas. Compensating balances are not legally restricted from withdrawal.
Subject to applicable market conditions, Southern Companyowns other direct and its subsidiaries expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, Southern Company and its subsidiaries may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
Southern Company's, Southern Company Gas', and Nicor Gas' credit arrangements contain covenants that limit debt levels to 70% of total capitalization, as defined in the agreements, and most of these other bank credit arrangements contain covenants that limit debt levels to 65% of total capitalization, as defined in the agreements. For purposes of these definitions, debt excludes the long-term debt payable to affiliated trusts and, in certain arrangements, other hybrid securities, and, for Southern Company and Mississippi Power, any securitized debt relating to the securitization of certain costs of the Kemper IGCC. Additionally, for Southern Company and Southern Power Company, for purposes of these definitions, debt excludes any project debt incurred by certain subsidiaries of Southern Power Company to the extent such debt is non-recourse to Southern Power Company and capitalization excludes the capital stock or other equity attributable to suchindirect subsidiaries. At December 31, 2016, Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas were each in compliance with their respective debt limit covenants.
A portion of the $8.3 billion unused credit with banks is allocated to provide liquidity support to the pollution control revenue bonds of the traditional electric operating companies and the commercial paper programs of Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas. The amount of variable rate pollution control revenue bonds of the traditional electric operating companies outstanding requiring liquidity support as of December 31, 2016 was approximately $1.9 billion. In addition, at December 31, 2016, the traditional electric operating companies had approximately $0.4 billion of fixed rate pollution control revenue bonds outstanding that were required to be remarketed within the next 12 months.
Southern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas, and Nicor Gas make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed
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Southern Company and Subsidiary Companies 2016 Annual Report

bank credit arrangements described above. Commercial paper and short-term bank term loans are included in notes payable in the balance sheets.
Details of short-term borrowings were as follows:
 Short-term Debt at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 (in millions)  
December 31, 2016:   
Commercial paper$1,909
 1.1%
Short-term bank debt123
 1.7%
Total$2,032
 1.1%
December 31, 2015:   
Commercial paper$740
 0.7%
Short-term bank debt500
 1.4%
Total$1,240
 0.9%
In addition to the short-term borrowings in the table above, Southern Power's subsidiary Project Credit Facilities had total amounts outstanding of $209 million and $137 million at a weighted average interest rate of 2.1% and 2.0% as of December 31, 2016 and 2015, respectively. The amounts outstanding as of December 31, 2016 under the Project Credit Facilities were fully repaid subsequent to December 31, 2016.
Redeemable Preferred Stock of Subsidiaries
Each of the traditional electric operating companies has issued preferred and/or preference stock. The preferred stock of Alabama Power and Mississippi Power contains a feature that allows the holders to elect a majority of such subsidiary's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of Alabama Power and Mississippi Power, this preferred stock is presented as "Redeemable Preferred Stock of Subsidiaries" in a manner consistent with temporary equity under applicable accounting standards. The preferred and preference stock at Georgia Power and the preference stock at Alabama Power and Gulf Power do not contain such a provision. As a result, under applicable accounting standards, the preferred and preference stock at Georgia Power and the preference stock at Alabama Power and Gulf Power are presented as "Preferred and Preference Stock of Subsidiaries," a separate component of "Stockholders' Equity," on Southern Company's balance sheets, statements of capitalization, and statements of stockholders' equity.
The following table presents changes during the year in redeemable preferred stock of subsidiaries for Southern Company:
 Redeemable Preferred Stock of Subsidiaries
 (in millions)
Balance at December 31, 2013$375
Issued
Redeemed
Balance at December 31, 2014375
Issued
Redeemed(262)
Other5
Balance at December 31, 2015118
Issued
Redeemed
Balance at December 31, 2016$118
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Southern Company and Subsidiary Companies 2016 Annual Report

7. COMMITMENTS
Fuel and Purchased Power Agreements
To supply a portion of the fuel requirements of the generating plants, the Southern Company system has entered into various long-term commitments for the procurement and delivery of fossil and nuclear fuel which are not recognized on the balance sheets. In 2016, 2015, and 2014, the traditional electric operating companies and Southern Power incurred fuel expense of $4.4 billion, $4.8 billion, and $6.0 billion, respectively, the majority of which was purchased under long-term commitments. Southern Company expects that a substantial amount of the Southern Company system's future fuel needs will continue to be purchased under long-term commitments.
In addition, the Southern Company system has entered into various long-term commitments for the purchase of capacity and electricity, some of which are accounted for as operating leases or have been used by a third party to secure financing. Total capacity expense under PPAs accounted for as operating leases was $232 million, $227 million, and $198 million for 2016, 2015, and 2014, respectively.
Estimated total obligations under these commitments at December 31, 2016 were as follows:
 
Operating Leases (*)
 Other
 (in millions)
2017$242
 $8
2018246
 7
2019249
 6
2020246
 5
2021249
 5
2022 and thereafter1,041
 43
Total$2,273
 $74
(*)A total of $197 million of biomass PPAs included under operating leases is contingent upon the counterparties meeting specified contract dates for commercial operation. Subsequent to December 31, 2016, the specified contract dates for commercial operation were extended from 2017 to 2019 and may change further as a result of regulatory action.
Pipeline Charges, Storage Capacity, and Gas Supply
Pipeline charges, storage capacity, and gas supply include charges recoverable through a natural gas cost recovery mechanism, or alternatively, billed to marketers selling retail natural gas, as well as demand charges associated with Southern Company Gas' wholesale gas services. The gas supply balance includes amounts for gas commodity purchase commitments associated with Southern Company Gas' gas marketing services of 33 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2016 and valued at $106 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries in support of payment obligations.
Expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets as of December 31, 2016 were as follows:
 Pipeline Charges, Storage Capacity, and Gas Supply
 (in millions)
2017$822
2018602
2019447
2020394
2021352
2022 and thereafter2,591
Total$5,208
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Operating Leases
The Southern Company system has operating lease agreements with various terms and expiration dates. Total rent expense was $169 million, $130 million, and $118 million for 2016, 2015, and 2014, respectively. Southern Company includes any step rents, escalations, and lease concessions in its computation of minimum lease payments, which are recognized on a straight-line basis over the minimum lease term.
As of December 31, 2016, estimated minimum lease payments under operating leases were as follows:
 Minimum Lease Payments
 
Barges &
Railcars
 Other Total
 (in millions)
2017$31
 $121
 $152
201819
 115
 134
201910
 103
 113
202010
 90
 100
20218
 82
 90
2022 and thereafter11
 1,184
 1,195
Total$89
 $1,695
 $1,784
For the traditional electric operating companies, a majority of the barge and railcar lease expenses are recoverable through fuel cost recovery provisions.
In addition to the above rental commitments, Alabama Power and Georgia Power have obligations upon expiration of certain railcar leases with respect to the residual value of the leased property. These leases have terms expiring through 2024 with maximum obligations under these leases of $44 million. At the termination of the leases, the lessee may renew the lease, exercise its purchase option, or the property can be sold to a third party. Alabama Power and Georgia Power expect that the fair market value of the leased property would substantially reduce or eliminate the payments under the residual value obligations.
Guarantees
In 2013, Georgia Power entered into an agreement that requires Georgia Power to guarantee certain payments of a gas supplier for Plant McIntosh for a period up to 15 years. The guarantee is expected to be terminated if certain events occur within one year of the initial gas deliveries in 2018. In the event the gas supplier defaults on payments, the maximum potential exposure under the guarantee is approximately $43 million.
As discussed above under "Operating Leases," Alabama Power and Georgia Power have entered into certain residual value guarantees.
8. COMMON STOCK
Stock Issued
In May and August 2016, Southern Company issued an aggregate of 50.8 million shares of common stock in underwritten offerings for an aggregate purchase price of approximately $2.5 billion. Of the 50.8 million shares, approximately 2.6 million were issued from treasury and the remainder were newly issued shares. The proceeds were used to fund a portion of the consideration for the Merger and related transaction costs, to fund a portion of the purchase price for the SNG investment and related transaction costs, and for other general corporate purposes.
During the fourth quarter 2016, Southern Company issued approximately 8.0 million shares of common stock through at-the-market issuances pursuant to sales agency agreements related to Southern Company's continuous equity offering program and received cash proceeds of approximately $381 million, net of $3 million in fees and commissions.
In addition, during 2016, Southern Company issued approximately 20 million shares of common stock primarily through employee equity compensation plans and received proceeds of approximately $874 million.
Shares Reserved
At December 31, 2016, a total of 94 million shares were reserved for issuance pursuant to the Southern Investment Plan, the Employee Savings Plan, the Outside Directors Stock Plan, and the Omnibus Incentive Compensation Plan (which includes stock
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options and performance share units as discussed below). Of the total 94 million shares reserved, there were 14 million shares of common stock remaining available for awards under the Omnibus Incentive Compensation Plan as of December 31, 2016.
Stock-Based Compensation
Stock-based compensation primarily in the form of performance share units may be granted through the Omnibus Incentive Compensation Plan to a large segment of Southern Company system employees ranging from line management to executives. As of December 31, 2016, there were 5,229 current and former employees participating in the stock option and performance share unit programs.
In conjunction with the Merger, stock-based compensation in the form of Southern Company restricted stock and performance share units was also granted to certain executives of Southern Company Gas through the Southern Company Omnibus Incentive Compensation Plan.
Stock Options
Through 2009, stock-based compensation granted to employees consisted exclusively of non-qualified stock options. The exercise price for stock options granted equaled the stock price of Southern Company common stock on the date of grant. Stock options vest on a pro rata basis over a maximum period of three years from the date of grant or immediately upon the retirement or death of the employee. Options expire no later than 10 years after the grant date. All unvested stock options vest immediately upon a change in control where Southern Company is not the surviving corporation. Compensation expense is generally recognized on a straight-line basis over the three-year vesting period with the exception of employees that are retirement eligible at the grant date and employees that will become retirement eligible during the vesting period. Compensation expense in those instances is recognized at the grant date for employees that are retirement eligible and through the date of retirement eligibility for those employees that become retirement eligible during the vesting period. In 2015, Southern Company discontinued the granting of stock options.
The estimated fair values of stock options granted were derived using the Black-Scholes stock option pricing model. Expected volatility was based on historical volatility of Southern Company's stock over a period equal to the expected term. Southern Company used historical exercise data to estimate the expected term that represents the period of time that options granted to employees are expected to be outstanding. The risk-free rate was based on the U.S. Treasury yield curve in effect at the time of grant that covers the expected term of the stock options.
The following table shows the assumptions used in the pricing model and the weighted average grant-date fair value of stock options granted:
Year Ended December 312014
Expected volatility14.6%
Expected term (in years)
5
Interest rate1.5%
Dividend yield4.9%
Weighted average grant-date fair value$2.20
Southern Company's activity in the stock option program for 2016 is summarized below:
 Shares Subject to Option Weighted Average Exercise Price
Outstanding at December 31, 201535,749,906
 $40.96
Exercised11,120,613
 40.26
Cancelled43,429
 41.38
Outstanding at December 31, 201624,585,864
 $41.28
Exercisable at December 31, 201621,133,320
 $41.26
The number of stock options vested, and expected to vest in the future, as of December 31, 2016 was not significantly different from the number of stock options outstanding at December 31, 2016 as stated above. As of December 31, 2016, the weighted average remaining contractual term for the options outstanding and options exercisable was approximately six years and five years, respectively, and the aggregate intrinsic value for the options outstanding and options exercisable was $195 million and $168 million, respectively.
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For the years ended December 31, 2016, 2015, and 2014, total compensation cost for stock option awards recognized in income was $3 million, $6 million, and $27 million, respectively, with the related tax benefit also recognized in income of $1 million, $2 million, and $10 million, respectively. As of December 31, 2016, the total unrecognized compensation cost related to stock option awards not yet vested was immaterial.
The total intrinsic value of options exercised during the years ended December 31, 2016, 2015, and 2014 was $120 million, $48 million, and $125 million, respectively. The actual tax benefit for the tax deductions from stock option exercises totaled $46 million, $19 million, and $48 million for the years ended December 31, 2016, 2015, and 2014, respectively. Prior to the adoption of ASU 2016-09, the excess tax benefits related to the exercise of stock options were recognized in Southern Company's financial statements with a credit to equity. Upon the adoption of ASU 2016-09, beginning in 2016, all tax benefits related to the exercise of stock options are recognized in income.
Southern Company has a policy of issuing shares to satisfy share option exercises. Cash received from issuances related to option exercises under the share-based payment arrangements for the years ended December 31, 2016, 2015, and 2014 was $448 million, $154 million, and $400 million, respectively.
Performance Share Units
From 2010 through 2014, stock-based compensation granted to employees included performance share units in addition to stock options. Beginning in 2015, stock-based compensation consisted exclusively of performance share units. Performance share units granted to employees vest at the end of a three-year performance period. All unvested performance share units vest immediately upon a change in control where Southern Company is not the surviving corporation. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of performance share units granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
The performance goal for all performance share units issued from 2010 through 2014 was based on the total shareholder return (TSR) for Southern Company common stock during the three-year performance period as compared to a group of industry peers. For these performance share units, at the end of three years, active employees receive shares based on Southern Company's performance while retired employees receive a pro rata number of shares based on the actual months of service during the performance period prior to retirement. The fair value of TSR-based performance share unit awards is determined as of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among the industry peers over the performance period. Southern Company recognizes compensation expense on a straight-line basis over the three-year performance period without remeasurement.
Beginning in 2015, Southern Company issued two additional types of performance share units to employees in addition to the TSR-based awards. These included performance share units with performance goals based on cumulative earnings per share (EPS) over the performance period and performance share units with performance goals based on Southern Company's equity-weighted ROE over the performance period. The EPS-based and ROE-based awards each represent 25% of total target grant date fair value of the performance share unit awards granted. The remaining 50% of the target grant date fair value consists of TSR-based awards. In contrast to the Monte Carlo simulation model used to determine the fair value of the TSR-based awards, the fair values of the EPS-based awards and the ROE-based awards are based on the closing stock price of Southern Company common stock on the date of the grant. Compensation expense for the EPS-based and ROE-based awards is generally recognized ratably over the three-year performance period initially assuming a 100% payout at the end of the performance period. The TSR-based performance share units, along with the EPS-based and ROE-based awards, vest immediately upon the retirement of the employee. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. The expected payout related to the EPS-based and ROE-based awards is reevaluated annually with expense recognized to date increased or decreased based on the number of shares currently expected to be issued. Unlike the TSR-based awards, the compensation expense ultimately recognized for the EPS-based awards and the ROE-based awards will be based on the actual number of shares issued at the end of the performance period.
In determining the fair value of the TSR-based awards issued to employees, the expected volatility was based on the historical volatility of Southern Company's stock over a period equal to the performance period. The risk-free rate was based on the U.S. Treasury yield curve in effect at the time of grant that covers the performance period of the awards. The following table shows the assumptions used in the pricing model and the weighted average grant-date fair value of performance share award units granted:
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Year Ended December 312016 2015 2014
Expected volatility15.0% 12.9% 12.6%
Expected term (in years)
3 3 3
Interest rate0.8% 1.0% 0.6%
Annualized dividend rate(*)
N/A N/A $2.03
Weighted average grant-date fair value$45.06 $46.38 $37.54
N/A - Not applicable
(*)Beginning in 2015, cash dividends paid on Southern Company's common stock are accumulated and payable in additional shares of Southern Company's common stock at the end of the three-year performance period and are embedded in the grant date fair value which equates to the grant date stock price.
The weighted average grant-date fair value of both EPS-based and ROE-based performance share units granted during 2016 and 2015 was $48.87 and $47.75, respectively.
Total unvested performance share units outstanding as of December 31, 2015 were 2,480,392. During 2016, 1,717,167 performance share units were granted, 937,121 performance share units were vested, and 35,899 performance share units were forfeited, resulting in 3,224,539 unvested performance share units outstanding at December 31, 2016. No shares were issued in January 2017 for the three-year performance and vesting period ended December 31, 2016.
For the years ended December 31, 2016, 2015, and 2014, total compensation cost for performance share units recognized in income was $96 million, $88 million, and $33 million, respectively, with the related tax benefit also recognized in income of $37 million, $34 million, and $13 million, respectively. As of December 31, 2016, $32 million of total unrecognized compensation cost related to performance share award units will be recognized over a weighted-average period of approximately 22 months.
Southern Company Gas Restricted Stock Awards
At the effective time of the Merger, each outstanding award of existing Southern Company Gas performance share units was converted into an award of Southern Company's restricted stock units (RSU). Under the terms of the RSU awards, the employees received Southern Company stock when they satisfy the requisite service period by being continuously employed through the original three-year vesting schedule of the award being replaced. Southern Company issued 742,461 RSUs with a grant-date fair value of $53.83, based on the closing stock price of Southern Company common stock on the date of the grant. As a portion of the fair value of the award related to pre-combination service, the grant date fair value was allocated to pre- or post-combination service and accounted for as Merger consideration or compensation cost, respectively. Approximately $13 million of the grant date fair value was allocated to Merger consideration.
As of December 31, 2016, total compensation cost and related tax benefit for RSUs recognized in income was $13 million and $4 million, respectively. As of December 31, 2016, $12 million of total unrecognized compensation cost related to RSUs is expected to be recognized over a weighted-average period of approximately 20 months.
Southern Company Gas Change in Control Awards
Southern Company awarded performance share units to certain Southern Company Gas employees who continued their employment with the Southern Company in lieu of certain change in control benefits the employee was entitled to receive following the Merger (change in control awards). Shares of Southern Company common stock and/or cash equal to the dollar value of the change in control benefit will vest and be issued one-third each year as long as the employee remains in service with Southern Company or its subsidiaries at each vest date. In addition to the change in control benefit, Southern Company common stock could be issued to the employees at the end of a performance period based on achievement of certain Southern Company common stock price metrics, as well performance goals established by the Compensation Committee of the Southern Company Board of Directors (achievement shares).
The change in control benefits are accounted for as a liability award with the fair value equal to the guaranteed dollar value of the change in control benefit. The grant-date fair value of the achievement portion of the award was determined using a Monte Carlo simulation model to estimate the number of achievement shares expected to vest based on the Southern Company common stock price. The expected payout is reevaluated annually with expense recognized to date increased or decreased proportionately based on the expected performance. The compensation expense ultimately recognized for the achievement shares will be based on the actual performance.
As of December 31, 2016, total compensation cost and related tax benefit for the change in control awards recognized in income was immaterial. As of December 31, 2016, approximately $20 million of total unrecognized compensation cost related to change in control awards is expected to be recognized over a weighted-average period of approximately 23 months.
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Southern Company and Subsidiary Companies 2016 Annual Report

Diluted Earnings Per Share
For Southern Company, the only difference in computing basic and diluted EPS is attributable to awards outstanding under the stock option and performance share plans. The effect of both stock options and performance share award units was determined using the treasury stock method. Shares used to compute diluted EPS were as follows:
 Average Common Stock Shares
 2016 2015 2014
 (in millions)
As reported shares951
 910
 897
Effect of options and performance share award units7
 4
 4
Diluted shares958
 914
 901
Prior to the adoption of ASU 2016-09, the effect of options and performance share award units included the assumed impacts of any excess tax benefits from the exercise of all "in the money" outstanding share based awards. In accordance with the new guidance, no prior year information was adjusted. Stock options and performance share award units that were not included in the diluted EPS calculation because they were anti-dilutive were immaterial as of December 31, 2016 and 2015.
Common Stock Dividend Restrictions
The income of Southern Company is derived primarily from equity in earnings of its subsidiaries. At December 31, 2016, consolidated retained earnings included $7.0 billion of undistributed retained earnings of the subsidiaries.
9. NUCLEAR INSURANCE
Under the Price-Anderson Amendments Act (Act), Alabama Power and Georgia Power maintain agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at the companies' nuclear power plants. The Act provides funds up to $13.4 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $375 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. A company could be assessed up to $127 million per incident for each licensed reactor it operates but not more than an aggregate of $19 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for Alabama Power and Georgia Power, based on its ownership and buyback interests in all licensed reactors, is $255 million and $247 million, respectively, per incident, but not more than an aggregate of $38 million and $37 million, respectively, per company to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. The next scheduled adjustment is due no later than September 10, 2018. See Note 4 for additional information on joint ownership agreements.
Alabama Power and Georgia Power are members of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, both companies have NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses in excess of the $1.5 billion primary coverage. In 2014, NEIL introduced a new excess non-nuclear policy providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks, with a maximum per occurrence per unit limit of $490 million. After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted in approximately three years. Alabama Power and Georgia Power each purchase limits based on the projected full cost of replacement power, subject to ownership limitations. Each facility has elected a 12-week deductible waiting period.
A builders' risk property insurance policy has been purchased from NEIL for the construction of Plant Vogtle Units 3 and 4. This policy provides the Vogtle Owners up to $2.75 billion for accidental property damage occurring during construction.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for Alabama Power and Georgia Power as of December 31, 2016 under the NEIL policies would be $53 million and $82 million, respectively.
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Southern Company and Subsidiary Companies 2016 Annual Report

Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate, however, that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the applicable company or to its debt trustees as may be appropriate under the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered from customers, would be borne by Alabama Power or Georgia Power, as applicable, and could have a material effect on Southern Company's financial condition and results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.
10. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of the Company of what a market participant would use in pricing an asset or liability. If there is little available market data, then the Company's own assumptions are the best available information.
In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.
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Southern Company and Subsidiary Companies 2016 Annual Report

As of December 31, 2016, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets  Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Energy-related derivatives(a)(b)
$338
 $333
 $
 $
 $671
Interest rate derivatives
 14
 
 
 14
Nuclear decommissioning trusts:(c)
         
Domestic equity589
 73
 
 
 662
Foreign equity48
 168
 
 
 216
U.S. Treasury and government agency securities
 92
 
 
 92
Municipal bonds
 73
 
 
 73
Corporate bonds22
 310
 
 
 332
Mortgage and asset backed securities
 183
 
 
 183
Private equity
 
 
 20
 20
Other11
 15
 
 
 26
Cash equivalents1,172
 
 
 
 1,172
Other investments9
 
 1
 
 10
Total$2,189
 $1,261
 $1
 $20
 $3,471
Liabilities:         
Energy-related derivatives(a)(b)
$345
 $285
 $
 $
 $630
Interest rate derivatives
 29
 
 
 29
Foreign currency derivatives
 58
 
 
 58
Contingent consideration
 
 18
 
 18
Total$345
 $372
 $18
 $
 $735
(a)Energy-related derivatives exclude $4 million associated with certain weather derivatives accounted for based on intrinsic value rather than fair value.
(b)
Energy-related derivatives exclude cash collateral of $62 million.
(c)
Includes the investment securities pledged to creditors and collateral received, and excludes receivables related to investment income, pending investment sales, and payables related to pending investment purchases and the lending pool. See Note 1 under "Nuclear Decommissioning" for additional information.
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As of December 31, 2015, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Energy-related derivatives$
 $7
 $
 $
 $7
Interest rate derivatives
 22
 
 
 22
Nuclear decommissioning trusts:(*)
         
Domestic equity541
 69
 
 
 610
Foreign equity47
 160
 
 
 207
U.S. Treasury and government agency securities
 152
 
 
 152
Municipal bonds
 64
 
 
 64
Corporate bonds11
 278
 
 
 289
Mortgage and asset backed securities
 145
 
 
 145
Private equity
 
 
 17
 17
Other16
 9
 
 
 25
Cash equivalents790
 
 
 
 790
Other investments9
 
 1
 
 10
Total$1,414
 $906
 $1
 $17
 $2,338
Liabilities:         
Energy-related derivatives$
 $220
 $
 $
 $220
Interest rate derivatives
 30
 
 
 30
Total$
 $250
 $
 $
 $250
(*)
Includes the investment securities pledged to creditors and collateral received, and excludes receivables related to investment income, pending investment sales, and payables related to pending investment purchases and the lending pool. See Note 1 under "Nuclear Decommissioning" for additional information.
Valuation Methodologies
The energy-related derivatives primarily consist of exchange-traded and over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard over-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and occasionally, implied volatility of interest rate options. The fair value of cross-currency swaps reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future foreign currency exchange rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and discount rates. The interest rate derivatives and cross-currency swaps are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 11 for additional information on how these derivatives are used.
The NRC requires licensees of commissioned nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. For fair value measurements of the investments within the nuclear decommissioning trusts, external pricing vendors are designated for each asset class with each security specifically assigned a primary pricing source. For
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Southern Company and Subsidiary Companies 2016 Annual Report

investments held within commingled funds, fair value is determined at the end of each business day through the net asset value, which is established by obtaining the underlying securities' individual prices from the primary pricing source. A market price secured from the primary source vendor is then evaluated by management in its valuation of the assets within the trusts. As a general approach, fixed income market pricing vendors gather market data (including indices and market research reports) and integrate relative credit information, observed market movements, and sector news into proprietary pricing models, pricing systems, and mathematical tools. Dealer quotes and other market information, including live trading levels and pricing analysts' judgments, are also obtained when available. See Note 1 under "Nuclear Decommissioning" for additional information.
Southern Power has contingent payment obligations related to certain acquisitions whereby Southern Power is obligated to pay generation-based payments to the seller over a 10-year period beginning at the commercial operation date. The obligation is measured at fair value using significant inputs such as forecasted facility generation in MW-hours, a fixed dollar amount per MW-hour, and a discount rate, and is evaluated periodically. The fair value of contingent consideration reflects the net present value of expected payments and any change arising from forecasted generation is expected to be immaterial.
"Other investments" include investments that are not traded in the open market. The fair value of these investments have been determined based on market factors including comparable multiples and the expectations regarding cash flows and business plan executions.
As of December 31, 2016 and 2015, the fair value measurements of private equity investments held in the nuclear decommissioning trust that are calculated at net asset value per share (or its equivalent) as a practical expedient, as well as the nature and risks of those investments, were as follows:
 Fair
Value
 Unfunded
Commitments
 Redemption
Frequency
 Redemption 
Notice Period 
 (in millions)



As of December 31, 2016$20

$25

Not Applicable
Not Applicable
As of December 31, 2015$17
 $28
 Not Applicable Not Applicable
Private equity funds include a fund-of-funds that invests in high-quality private equity funds across several market sectors, a fund that invests in real estate assets, and a fund that acquires companies to create resale value. Private equity funds do not have redemption rights. Distributions from these funds will be received as the underlying investments in the funds are liquidated. Liquidations are expected to occur at various times over the next 10 years.
As of December 31, 2016 and 2015, other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt, including securities due within one year:   
2016$45,080
 $46,286
2015$27,216
 $27,913
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates available to Southern Company, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power, Southern Company Gas, and Nicor Gas.
11. DERIVATIVES
The Southern Company system is exposed to market risks, including commodity price risk, interest rate risk, weather risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, each company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to each company's policies in areas such as counterparty exposure and risk management practices. Each company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 10 for additional information. In the statements of cash flows,
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Southern Company and Subsidiary Companies 2016 Annual Report

the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities. The cash impacts of settled foreign currency derivatives are classified as operating or financing activities to correspond with classification of the hedged interest or principal, respectively. See Note 1 under "Financial Instruments" for additional information.
Energy-Related Derivatives
Southern Company and certain subsidiaries enter into energy-related derivatives to hedge exposures to electricity, natural gas, and other fuel price changes. However, due to cost-based rate regulations and other various cost recovery mechanisms, the traditional electric operating companies and natural gas distribution utilities have limited exposure to market volatility in energy-related commodity prices. Each of the traditional electric operating companies and certain of the natural gas distribution utilities manage fuel-hedging programs, implemented per the guidelines of their respective state PSCs or other applicable state regulatory agencies, through the use of financial derivative contracts, which is expected to continue to mitigate price volatility. The traditional electric operating companies (with respect to wholesale generating capacity) and Southern Power have limited exposure to market volatility in energy-related commodity prices because their long-term sales contracts shift substantially all fuel cost responsibility to the purchaser. However, the traditional electric operating companies and Southern Power may be exposed to market volatility in energy-related commodity prices to the extent any uncontracted capacity is used to sell electricity.
Southern Company Gas uses storage and transportation capacity contracts to manage market price risks. Southern Company Gas purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than the market price Southern Company Gas will receive in the future, resulting in a positive net adjusted operating margin. Southern Company Gas uses New York Mercantile Exchange (NYMEX) futures and over-the-counter (OTC) contracts to sell natural gas at that future price to substantially protect the adjusted operating margin ultimately realized when the stored natural gas is sold. Southern Company Gas also enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. Southern Company Gas uses NYMEX futures and OTC contracts to capture the price differential between the locations served by the capacity in order to substantially protect the adjusted operating margin ultimately realized when natural gas is physically flowed between the delivery points. These contracts generally meet the definition of derivatives, but are not designated as hedges for accounting purposes.
Southern Company Gas also enters into weather derivative contracts as economic hedges of adjusted operating margins in the event of warmer-than-normal weather. Exchange-traded options are carried at fair value, with changes reflected in operating revenues. Non-exchange-traded options are accounted for using the intrinsic value method. Changes in the intrinsic value for non-exchange-traded contracts are reflected in the statements of income.
Energy-related derivative contracts are accounted for under one of three methods:
Regulatory Hedges – Energy-related derivative contracts which are designated as regulatory hedges relate primarily to the traditional electric operating companies' and natural gas distribution utilities' fuel-hedging programs, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through the respective fuel cost recovery clauses.
Cash Flow Hedges – Gains and losses on energy-related derivatives designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales) are initially deferred in OCI before being recognized in the statements of income in the same period as the hedged transactions are reflected in earnings.
Not Designated – Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric and natural gas industries. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2016, the net volume of energy-related derivative contracts for natural gas positions totaled 500 million mmBtu for the Southern Company system, with the longest hedge date of 2020 over which the respective entity is hedging its exposure to the variability in future cash flows for forecasted transactions and the longest non-hedge date of 2022 for derivatives not designated as hedges.
In addition to the volumes discussed above, the traditional electric operating companies and Southern Power enter into physical natural gas supply contracts that provide the option to sell back excess gas due to operational constraints. The maximum expected volume of natural gas subject to such a feature is 9 million mmBtu.
For cash flow hedges, the amounts expected to be reclassified from accumulated OCI to earnings for the next 12-month period ending December 31, 2017 are $17 million for Southern Company.
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

Interest Rate Derivatives
Southern Company and certain subsidiaries may also enter into interest rate derivatives to hedge exposure to changes in interest rates. The derivatives employed as hedging instruments are structured to minimize ineffectiveness. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time the hedged transactions affect earnings, with any ineffectiveness recorded directly to earnings. Derivatives related to existing fixed rate securities are accounted for as fair value hedges, where the derivatives' fair value gains or losses and hedged items' fair value gains or losses are both recorded directly to earnings, providing an offset, with any difference representing ineffectiveness. Fair value gains or losses on derivatives that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
At December 31, 2016, the following interest rate derivatives were outstanding:

Notional
Amount

Interest
Rate
Received

Weighted Average Interest
Rate Paid

Hedge
Maturity
Date

Fair Value
Gain (Loss)
December 31,
2016

(in millions)






(in millions)
Cash Flow Hedges of Forecasted Debt








$80

3-month LIBOR
2.32%
December 2026
$
Cash Flow Hedges of Existing Debt








900

1-month LIBOR
0.79%
March 2018
3
Fair Value Hedges of Existing Debt








250

1.30%
3-month LIBOR + 0.17%
August 2017

 250
 5.40% 3-month LIBOR + 4.02% June 2018 
 500
 1.95% 3-month LIBOR + 0.76% December 2018 (2)
 200
 4.25% 3-month LIBOR + 2.46% December 2019 1
 300
 2.75% 3-month LIBOR + 0.92% June 2020 1
 1,500
 2.35% 1-month LIBOR + 0.87% July 2021 (18)
Derivatives not Designated as Hedges








 47
(a,b)3-month LIBOR 2.21% January 2017(c)1
Total$4,027







$(14)
(a)Swaption at RE Roserock LLC. See Note 12 for additional information.
(b)Amortizing notional amount.
(c)Represents the mandatory settlement date. Settlement amount was based on a 15-year amortizing swap.
The estimated pre-tax gains (losses) expected to be reclassified from accumulated OCI to interest expense for the next 12-month period ending December 31, 2017 total $(21) million. Deferred gains and losses are expected to be amortized into earnings through 2046.
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Southern Company and Subsidiary Companies 2016 Annual Report

Foreign Currency Derivatives
Southern Company and certain subsidiaries may also enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars. Derivatives related to forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time that the hedged transactions affect earnings, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. Any ineffectiveness is recorded directly to earnings. The derivatives employed as hedging instruments are structured to minimize ineffectiveness.
At December 31, 2016, the following foreign currency derivatives were outstanding:
 Pay NotionalPay RateReceive NotionalReceive RateHedge
Maturity Date
Fair Value
Gain (Loss) at December 31, 2016
 (in millions) (in millions)  (in millions)
Cash Flow Hedges of Existing Debt     

$677
2.95%600
1.00%June 2022$(34)

564
3.78%500
1.85%June 2026(24)
Total$1,241
 1,100
  $(58)
The estimated pre-tax gains (losses) that will be reclassified from accumulated OCI to earnings for the next 12-month period ending December 31, 2017 total $(25) million.
Derivative Financial Statement Presentation and Amounts
Southern Company and its subsidiaries enter into derivative contracts that may contain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. Southern Company and certain subsidiaries also utilize master netting agreements to mitigate exposure to counterparty credit risk. These agreements may contain provisions that permit netting across product lines and against cash collateral.
At December 31, 2016, fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with the counterparties. At December 31, 2015, the fair value amounts of derivative instruments were presented gross on the balance sheets.
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Southern Company and Subsidiary Companies 2016 Annual Report

At December 31, 2016 and 2015, the fair value of energy-related derivatives, interest rate derivatives, and foreign currency derivatives was reflected in the balance sheets as follows:
 2016 2015
Derivative Category and Balance Sheet LocationAssetsLiabilities AssetsLiabilities
 (in millions)
Derivatives designated as hedging instruments for regulatory purposes     
Energy-related derivatives:     
Other current assets/Liabilities from risk management activities, net of collateral$73
$27
 $3
$130
Other deferred charges and assets/Other deferred credits and liabilities25
33
 
87
Total derivatives designated as hedging instruments for regulatory purposes$98
$60
 $3
$217
Derivatives designated as hedging instruments in cash flow and fair value hedges     
Energy-related derivatives:     
Other current assets/Liabilities from risk management activities, net of collateral$23
$7
 $3
$2
Interest rate derivatives:     
Other current assets/Liabilities from risk management activities, net of collateral12
1
 19
23
Other deferred charges and assets/Other deferred credits and liabilities1
28
 
7
Foreign currency derivatives:     
Other current assets/Liabilities from risk management activities, net of collateral
25
 

Other deferred charges and assets/Other deferred credits and liabilities
33
 

Total derivatives designated as hedging instruments in cash flow and fair value hedges$36
$94
 $22
$32
Derivatives not designated as hedging instruments     
Energy-related derivatives:     
Other current assets/Liabilities from risk management activities, net of collateral$489
$483
 $1
$1
Other deferred charges and assets/Other deferred credits and liabilities66
81
 

Interest rate derivatives:     
Other current assets/Liabilities from risk management activities, net of collateral1

 3

Total derivatives not designated as hedging instruments$556
$564
 $4
$1
Gross amounts recognized$690
$718
 $29
$250
Gross amounts offset(a)
$(462)$(524) $(15)$(15)
Net amounts recognized in the Balance Sheets(b)
$228
$194
 $14
$235
(a)Gross amounts offset include cash collateral held on deposit in broker margin accounts of $62 million as of December 31, 2016.
(b)At December 31, 2015, the fair value amounts for derivative contracts subject to netting arrangements were presented gross on the balance sheet.
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Southern Company and Subsidiary Companies 2016 Annual Report

At December 31, 2016 and 2015, the pre-tax effects of unrealized derivative gains (losses) arising from energy-related derivatives designated as regulatory hedging instruments and deferred were as follows:
 Unrealized Losses Unrealized Gains
Derivative CategoryBalance Sheet Location2016 2015 Balance Sheet Location2016 2015
  (in millions)  (in millions)
Energy-related derivatives:(a)
Other regulatory assets, current$(16) $(130) Other regulatory liabilities, current$56
 $3
 Other regulatory assets, deferred(19) (87) Other regulatory liabilities, deferred12
 
Total energy-related derivative gains (losses)(b)
 $(35) $(217)  $68
 $3
(a)At December 31, 2016, the unrealized gains and losses for derivative contracts subject to netting arrangements were presented net on the balance sheet. At December 31, 2015, the unrealized gains and losses for derivative contracts were presented gross on the balance sheet.
(b)Fair value gains and losses recorded in regulatory assets and liabilities include cash collateral held on deposit in broker margin accounts of $8 million as of December 31, 2016.
For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of energy-related derivatives, interest rate derivatives, and foreign currency derivatives designated as cash flow hedging instruments on the statements of income were as follows:
Derivatives in Cash Flow Hedging RelationshipsGain (Loss) Recognized in OCI on Derivative (Effective Portion)
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)

Amount
 Amount
Derivative Category2016
2015
2014
Statements of Income Location2016
2015
2014
 (in millions)
 (in millions)
Energy-related derivatives$18

$

$

Depreciation and amortization$2

$

$










Cost of natural gas(1)



Interest rate derivatives(180)
(22)
(16)
Interest expense, net of amounts capitalized(18)
(9)
(8)
Foreign currency derivatives(58)




Interest expense, net of amounts capitalized(13)













Other income (expense), net(*)
(82)



Total$(220)
$(22)
$(16)

$(112)
$(9)
$(8)
(*)The reclassification from accumulated OCI into other income (expense), net completely offsets currency gains and losses arising from changes in the U.S. currency exchange rates used to record the euro-denominated notes.
For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of interest rate derivatives designated as fair value hedging instruments were as follows:
Derivatives in Fair Value Hedging Relationships
Gain (Loss)
Derivative CategoryStatements of Income Location2016 2015 2014
  (in millions)
Interest rate derivatives:Interest expense, net of amounts capitalized$(21) $2
 $(3)
For all years presented, the pre-tax effects of interest rate derivatives designated as fair value hedging instruments were offset by changes to the carrying value of long-term debt.
There was no material ineffectiveness recorded in earnings for any period presented.
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Southern Company and Subsidiary Companies 2016 Annual Report

For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of energy-related derivatives not designated as hedging instruments on the statements of income were as follows:
Derivatives Not Designated as Hedging Instruments
Unrealized Gain (Loss) Recognized in Income


Amount
Derivative CategoryStatements of Income Location2016
2015
2014


(in millions)
Energy-related derivativesWholesale electric revenues$2

$(5)
$6

Fuel

3

(4)

Natural gas revenues(*)
33





Cost of natural gas3




Total
$38

$(2)
$2
(*)Excludes gains (losses) recorded in cost of natural gas associated with weather derivatives of $6 million for the period ended December 31, 2016.
For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of interest rate derivatives not designated as hedging instruments were immaterial.
Contingent Features
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain Southern Company subsidiaries. At December 31, 2016, the fair value of derivative liabilities with contingent features was immaterial. The maximum potential collateral requirements arising from the credit-risk-related contingent features, at a rating below BBB- and/or Baa3, were immaterial and include certain agreements that could require collateral in the event that one or more Southern Company system power pool participants has a credit rating change to below investment grade.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
Southern Company maintains accounts with brokers or the clearing houses of certain exchanges to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Southern Company may be required to deposit cash into these accounts. At December 31, 2016, cash collateral held on deposit in broker margin accounts was $62 million.
Southern Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. Southern Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. Southern Company has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate Southern Company's exposure to counterparty credit risk. Southern Company may require counterparties to pledge additional collateral when deemed necessary. Therefore, Southern Company does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance.
12. ACQUISITIONS
Southern Company
Merger with Southern Company Gas
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas through the natural gas distribution utilities. On July 1, 2016, Southern Company completed the Merger for a total purchase price of approximately $8.0 billion and Southern Company Gas became a wholly-owned, direct subsidiary of Southern Company.
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The Merger was accounted for using the acquisition method of accounting with the assets acquired and liabilities assumed recognized at fair value as of the acquisition date. The following table presents the purchase price allocation:
Southern Company Gas Purchase PriceDecember 31, 2016
 (in millions)
Current assets$1,557
Property, plant, and equipment10,108
Goodwill5,967
Intangible assets400
Regulatory assets1,118
Other assets229
Current liabilities(2,201)
Other liabilities(4,742)
Long-term debt(4,261)
Noncontrolling interests(174)
Total purchase price$8,001
The excess of the purchase price over the estimated fair values of the assets acquired and liabilities assumed of $6.0 billion is recognized as goodwill, which is primarily attributable to positioning the Southern Company system to provide natural gas infrastructure to meet customers' growing energy needs and to compete for growth across the energy value chain. Southern Company anticipates that much of the value assigned to goodwill will not be deductible for tax purposes.
The valuation of identifiable intangible assets included customer relationships, trade names, and storage and transportation contracts with estimated lives of one to 28 years. The estimated fair value measurements of identifiable intangible assets were primarily based on significant unobservable inputs (Level 3).
The results of operations for Southern Company Gas have been included in the consolidated financial statements from the date of acquisition and consist of operating revenues of $1.7 billion and net income of $114 million.
The following summarized unaudited pro forma consolidated statement of earnings information assumes that the acquisition of Southern Company Gas was completed on January 1, 2015. The summarized unaudited pro forma consolidated statement of earnings information includes adjustments for (i) intercompany sales, (ii) amortization of intangible assets, (iii) adjustments to interest expense to reflect current interest rates on Southern Company Gas debt and additional interest expense associated with borrowings by Southern Company to fund the Merger, and (iv) the elimination of nonrecurring expenses associated with the Merger.
 20162015
   
Operating revenues (in millions)$21,791
$21,430
Net income attributable to Southern Company (in millions)$2,591
$2,665
Basic EPS$2.70
$2.85
Diluted EPS$2.68
$2.84
These unaudited pro forma results are for comparative purposes only and may not be indicative of the results that would have occurred had this acquisition been completed on January 1, 2015 or the results that would be attained in the future.
During 2016 and 2015, Southern Company recorded in its statements of income costs associated with the Merger of approximately $111 million and $41 million, respectively, of which $80 million and $27 million is included in operating expenses and $31 million and $14 million is included in other income and (expense), respectively. These costs include external transaction costs for financing, legal, and consulting services, as well as customer rate credits and additional compensation-related expenses.
Acquisition of PowerSecure
On May 9, 2016, Southern Company acquired all of the outstanding stock of PowerSecure, a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure, for $18.75 per common share in cash, resulting in an aggregate purchase price of $429 million. As a result, PowerSecure became a wholly-owned subsidiary of Southern Company.
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The acquisition of PowerSecure was accounted for using the acquisition method of accounting with the assets acquired and liabilities assumed recognized at fair value as of the acquisition date. The allocation of the purchase price is as follows:
PowerSecure Purchase PriceDecember 31, 2016
 (in millions)
Current assets$172
Property, plant, and equipment46
Intangible assets101
Goodwill282
Other assets4
Current liabilities(114)
Long-term debt, including current portion(48)
Deferred credits and other liabilities(14)
Total purchase price$429
The excess of the purchase price over the estimated fair values of the assets acquired and liabilities assumed of $282 million was recognized as goodwill, which is primarily attributable to expected business expansion opportunities for PowerSecure. Southern Company anticipates that the majority of the value assigned to goodwill will not be deductible for tax purposes.
The valuation of identifiable intangible assets included customer relationships, trade names, patents, backlog, and software with estimated lives of one to 26 years. The estimated fair value measurements of identifiable intangible assets were primarily based on significant unobservable inputs (Level 3).
The results of operations for PowerSecure have been included in the consolidated financial statements from the date of acquisition and are immaterial to the consolidated financial results of Southern Company. Pro forma results of operations have not been presented for the acquisition because the effects of the acquisition were immaterial to Southern Company's consolidated financial results for all periods presented.
Alliance with Bloom Energy Corporation
On October 24, 2016, a subsidiary of Southern Company acquired from an affiliate of Bloom Energy Corporation (Bloom) all of the equity interests of 2016 ESA HoldCo, LLC and its subsidiary, 2016 ESA Project Company, LLC. 2016 ESA Project Company, LLC expects to acquire 50 MWs of Bloom fuel cell systems to serve commercial and industrial customers under long-term PPAs. In connection with this transaction, PowerSecure and Bloom agreed to pursue a strategic alliance to develop technology for behind-the-meter energy solutions.
Investment in Southern Natural Gas
On July 10, 2016, Southern Company and Kinder Morgan, Inc. entered into a definitive agreement for Southern Company to acquire a 50% equity interest in SNG, which is the owner of a 7,000-mile pipeline system connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee. On August 31, 2016, Southern Company assigned its rights and obligations under the definitive agreement to a wholly-owned, indirect subsidiary of Southern Company Gas. On September 1, 2016, Southern Company Gas completed the acquisition for a purchase price of approximately $1.4 billion. The investment in SNG is accounted for using the equity method.
Acquisition of Remaining Interest in SouthStar
SouthStar is a retail natural gas marketer and markets natural gas to residential, commercial, and industrial customers, primarily in Georgia and Illinois. Southern Company Gas previously had an 85% ownership interest in SouthStar, with Piedmont owning the remaining 15%. In October 2016, Southern Company Gas purchased Piedmont's 15% interest in SouthStar for $160 million.
Southern Power
During 2016 and 2015, in accordance with its overall growth strategy, Southern Power or one of its wholly-owned subsidiaries, Southern Renewable Partnerships, LLC (SRP) or Southern Renewable Energy, Inc. (SRE), acquired or contracted to acquire the projects discussed below. Also, on March 29, 2016, Southern Power acquired an additional 15% interest in Desert Stateline, 51% of which was initially acquired in August 2015. As a result, Southern Power and the class B member are now entitled to 66% and
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Southern Company and Subsidiary Companies 2016 Annual Report

34%, respectively, of all cash distributions from Desert Stateline. In addition, Southern Power will continue to be entitled to substantially all of the federal tax benefits with respect to the transaction.
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Southern Company and Subsidiary Companies 2016 Annual Report

The following table presents Southern Power's acquisitions during and subsequent to the year ended December 31, 2016.
Project FacilityResourceSeller; Acquisition DateApproximate Nameplate Capacity (MW) LocationSouthern Power Percentage OwnershipActual/Expected CODPPA Contract Period
Acquisitions During the Year Ended December 31, 2016
Boulder 1SolarSunPower Corp.
November 16, 2016
100 Clark County, NV51%(a)December 201620 years
CalipatriaSolarSolar Frontier Americas Holding LLC
February 11, 2016
20 Imperial County, CA90%(b)February 201620 years
East PecosSolarFirst Solar, Inc.
March 4, 2016
120 Pecos County, TX100% March 201715 years
Grant PlainsWindApex Clean Energy Holdings, LLC
August 26, 2016
147 Grant County, OK100% December 2016
20 years and 12 years (c)
Grant WindWindApex Clean Energy Holdings, LLC
April 7, 2016
151 Grant County, OK100% April 201620 years
HenriettaSolarSunPower Corp.
July 1, 2016
102 Kings County, CA51%(a)July 201620 years
LamesaSolarRES America Developments Inc.
July 1, 2016
102 Dawson County, TX100% Second quarter 201715 years
Mankato(d)
Natural GasCalpine Corporation October 26, 2016375 Mankato, MN100% 
N/A (e)
10 years
PassadumkeagWindQuantum Utility Generation, LLC
June 30, 2016
42 Penobscot County, ME100% July 201615 years
RutherfordSolarCypress Creek Renewables, LLC
July 1, 2016
74 Rutherford County, NC90%(b)December 201615 years
Salt ForkWindEDF Renewable Energy, Inc.
December 1, 2016
174 Donley and Gray Counties, TX100% December 201614 years and 12 years
Tyler BluffWindEDF Renewable Energy, Inc.
December 21, 2016
125 Cooke County, TX100% December 201612 years
Wake WindWind
Invenergy Wind
Global LLC
October 26, 2016
257 Floyd and Crosby Counties, TX90.1%(f)October 201612 years
Acquisitions Subsequent to December 31, 2016
BethelWind
Invenergy Wind
Global LLC
January 6, 2017
276 Castro County, TX100% January 201712 years
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Southern Company and Subsidiary Companies 2016 Annual Report

(a)Southern Power owns 100% of the class A membership interests and a wholly-owned subsidiary of the seller owns 100% of the class B membership interests. Southern Power and the class B member are entitled to 51% and 49%, respectively, of all cash distributions from the project. In addition, Southern Power is entitled to substantially all of the federal tax benefits with respect to the transaction.
(b)Southern Power owns 90%, with the minority owner, Turner Renewable Energy, LLC (TRE), owning 10%.
(c)In addition to the 20-year and 12-year PPAs, the facility has a 10-year contract with Allianz Risk Transfer (Bermuda) Ltd.
(d)Under the terms of the remaining 10-year PPA and the 20-year expansion PPA, approximately $408 million of assets, primarily related to property, plant, and equipment, are subject to lien at December 31, 2016.
(e)The acquisition included a fully operational 375-MW natural gas-fired combined-cycle facility.
(f)Southern Power owns 90.1%, with the minority owner, Invenergy Wind Global LLC, owning 9.9%.
Acquisitions During the Year Ended December 31, 2016
Southern Power's aggregate purchase price for acquisitions during the year ended December 31, 2016 was approximately $2.3 billion. Including the minority owner TRE's 10% ownership interest in Calipatria and Rutherford, SunPower Corp's 49% ownership interest in Boulder 1 and Henrietta, along with the assumption of $217 million in construction debt (non-recourse to Southern Power), and Invenergy Wind Global LLC's 9.9% ownership interest in Wake Wind, the total aggregate purchase price is approximately $2.6 billion for the project facilities acquired during the year ended December 31, 2016. The allocations of the purchase price to individual assets have not been finalized, except for Calipatria, East Pecos, Lamesa, and Rutherford, which were finalized with no changes to amounts originally reported. The fair values of the assets and liabilities acquired through the business combinations were recorded as follows:
 2016
 (in millions)
CWIP$2,354
Property, plant, and equipment302
Intangible assets (a)
128
Other assets52
Accounts payable(16)
Debt(217)
Total purchase price$2,603
  
Funded by: 
Southern Power (b)(c)
$2,345
Noncontrolling interests (d)(e)
258
Total purchase price$2,603
(a)Intangible assets consist of acquired PPAs that will be amortized over 10 and 20-year terms. The estimated amortization for future periods is approximately $9 million per year.
(b)At December 31, 2016, $461 million is included in acquisitions payable on the balance sheets.
(c)Includes approximately $281 million of contingent consideration, of which $67 million remains payable at December 31, 2016.
(d)Includes approximately $51 million of non-cash contributions recorded as capital contributions from noncontrolling interests in the statements of stockholders' equity.
(e)Includes approximately $142 million of contingent consideration, all of which had been paid at December 31, 2016 by the noncontrolling interests.

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Southern Company and Subsidiary Companies 2016 Annual Report

The following table presents Southern Power's acquisitions for the year ended December 31, 2015. During the year ended December 31, 2016, the fair values of assets and liabilities acquired for all projects listed below were finalized with no changes to amounts originally reported.
Project FacilityResourceSeller; Acquisition Date
Approximate
Nameplate Capacity (
MW)
 Location
Southern Power
Percentage Ownership
Actual CODPPA
Contract Period
Acquisitions for the Year Ended December 31, 2015
Desert StatelineSolarFirst Solar Inc.
August 31, 2015
299(a)

San Bernardino County, CA51%(b)From December 2015 to July 201620 years
Garland and Garland ASolarRecurrent Energy, LLC
December 17, 2015
205 Kern County, CA51%(b)October and August 201615 years and 20 years
Kay WindWindApex Clean Energy Holdings, LLC December 11, 2015299 Kay County, OK100% December 201520 years
Lost Hills BlackwellSolarFirst Solar Inc.
April 15, 2015
33 Kern County, CA51%(b)April 201529 years
MorelosSolarSolar Frontier Americas Holding, LLC
October 22, 2015
15 Kern County, CA90%(c)November 201520 years
North StarSolarFirst Solar Inc.
April 30, 2015
61 Fresno County, CA51%(b)June 201520 years
RoserockSolarRecurrent Energy, LLC November 23, 2015160 Pecos County, TX51%(b)November 201620 years
TranquillitySolarRecurrent Energy, LLC
August 28, 2015
205 Fresno County, CA51%(b)July 201618 years
(a)The facility has a total of 299 MWs, of which 110 MWs were placed in service in the fourth quarter 2015 and the remainder by July 2016.
(b)Southern Power owns 100% of the class A membership interests and a wholly-owned subsidiary of the seller owns 100% of the class B membership interests. Southern Power and the class B member are entitled to 51% and 49%, respectively, of all cash distributions from the project. In addition, Southern Power is entitled to substantially all of the federal tax benefits with respect to the transaction.
(c)Southern Power owns 90%, with the minority owner, TRE, owning 10%.
Acquisitions During the Year Ended December 31, 2015
Southern Power's aggregate purchase price for the project facilities acquired during the year ended December 31, 2015 was approximately $1.4 billion. Including the minority owner TRE's 10% ownership interest in Morelos, First Solar Inc.'s 49% ownership interest in Desert Stateline, Lost Hills Blackwell, and North Star, and Recurrent Energy, LLC's 49% ownership interest in Garland, Garland A, Roserock, and Tranquillity, the total aggregate purchase price was approximately $1.9 billion for the project facilities acquired during the year ended December 31, 2015.
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Southern Company and Subsidiary Companies 2016 Annual Report

The fair values of the assets and liabilities acquired through the business combinations were recorded as follows:
 2015
 (in millions)
CWIP$1,367
Property, plant, and equipment315
Intangible assets (a)
274
Other assets64
Accounts payable(89)
Total purchase price$1,931
  
Funded by: 
Southern Power (b)
$1,440
Noncontrolling interests (c) (d)
491
Total purchase price$1,931
(a)Intangible assets consist of acquired PPAs that will be amortized over 20-year terms. The estimated amortization for future periods is approximately $14 million per year.
(b)Includes approximately $195 million of contingent consideration, all of which has been paid at December 31, 2016.
(c)Includes approximately $227 million of non-cash contributions recorded as capital contributions from noncontrolling interests in the statements of stockholders' equity.
(d)Includes approximately $76 million of contingent consideration, all of which had been paid at December 31, 2016 by the noncontrolling interests.
Construction Projects
Construction Projects Completed
During 2016, in accordance with Southern Power's overall growth strategy, Southern Power completed construction of, and placed in service, the projects set forth in the table below. Total costs of construction incurred for these projects were $3.2 billion.
Solar FacilitySeller
Approximate Nameplate Capacity (MW)
LocationActual CODPPA Contract Period
ButlerCERSM, LLC and Community Energy, Inc.103Taylor County, GADecember 2016
30 years (a)
Butler Solar FarmStrata Solar Development, LLC22Taylor County, GAFebruary 2016
20 years (a)
Desert StatelineFirst Solar Development, LLC
299(b)
San Bernardino County, CAFrom December 2015 to July 201620 years
GarlandRecurrent Energy, LLC185Kern County, CAOctober 201615 years
Garland ARecurrent Energy, LLC20Kern County, CAAugust 201620 years
PawpawLongview Solar, LLC30Taylor County, GAMarch 201630 years
Roserock (c)
Recurrent Energy, LLC160Pecos County, TXNovember 201620 years
SandhillsN/A146Taylor County, GAOctober 201625 years
TranquillityRecurrent Energy, LLC205Fresno County, CAJuly 201618 years
(a)Affiliate PPA approved by the FERC.
(b)The facility has a total of 299 MWs, of which 110 MWs were placed in service in the fourth quarter 2015 and the remainder by July 2016.
(c)Prior to placing the Roserock facility in service, certain solar panels were damaged. While the facility is currently generating energy as expected, Southern Power is pursuing remedies under its insurance policies and other contracts to repair or replace these solar panels.
Construction Projects in Progress
At December 31, 2016, Southern Power continued construction of the East Pecos and Lamesa solar facilities that were acquired in 2016. In addition, as part of Southern Power's acquisition of Mankato in 2016, Southern Power commenced construction of an additional 345-MW expansion, which is fully contracted under a new 20-year PPA. Total aggregate construction costs, excluding the acquisition costs, are expected to be $530 million to $590 million for East Pecos, Lamesa, and Mankato. At December 31,
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NOTES (continued)
Southern Company and Subsidiary Companies 2016 Annual Report

2016, the construction costs totaled $386 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
The following table presents Southern Power's construction projects in progress as of December 31, 2016:
Project FacilityResourceApproximate Nameplate Capacity (MW)LocationActual/Expected CODPPA Contract Period
East PecosSolar120Pecos County, TXMarch 201715 years
LamesaSolar102Dawson County, TXSecond quarter 201715 years
MankatoNatural Gas345Mankato, MNSecond quarter 201920 years
Development Projects
In December 2016, as part of Southern Power's renewable development strategy, SRP entered into a joint development agreement with Renewable Energy Systems Americas, Inc. to develop and construct approximately 3,000 MWs across 10 wind projects expected to be placed in service between 2018 and 2020. Also in December 2016, Southern Power signed agreements and made payments to purchase wind turbine equipment from Siemens Wind Power, Inc. and Vestas-American Wind Technology, Inc. to be used for construction of the facilities. Once these wind projects reach commercial operations, they are expected to qualify for 100% PTCs. The ultimate outcome of these matters cannot be determined at this time.
13. SEGMENT AND RELATED INFORMATION
The primary businessbusinesses of the Southern Company system isare electricity sales by the traditional electric operating companies and Southern Power and as a result of closing the Merger, the distribution of natural gas by Southern Company Gas. The four traditional electric operating companies – Alabama Power, Georgia Power, Gulf Power, and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. Southern Power constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through the natural gas distribution utilities in seven states and is involved in several other complementary businesses including gas marketing services, wholesale gas services, and gas midstream operations.
Southern Company's reportable business segments are the sale of electricity by the four traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas. Revenues from sales by
The traditional electric operating companies – Alabama Power, Georgia Power, and Mississippi Power – are vertically integrated utilities providing electric service to retail customers in three Southeastern states in addition to wholesale customers in the Southeast.
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas. Southern Company Gas owns natural gas distribution utilities in four states – Illinois, Georgia, Virginia, and Tennessee – and is also involved in several other complementary businesses. Southern Company Gas manages its business through four reportable segments – gas distribution operations, gas pipeline investments, wholesale gas services, which includes Sequent, a natural gas asset optimization company, and gas marketing services, which includes SouthStar, a provider of energy-related products and services to natural gas markets – and one non-reportable segment, all other. See Notes 7 and 16 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of the Southern Company system's electric service and natural gas businesses. These factors include the ability to maintain constructive regulatory environments, to maintain and grow sales and customers, and to effectively manage and secure timely recovery of prudently-incurred costs. These costs include those related to projected long-term demand growth; stringent environmental standards, including CCR rules; safety; system reliability and resilience; fuel; natural gas; restoration following major storms; and capital expenditures, including constructing new electric generating plants and expanding and improving the electric transmission and electric and natural gas distribution systems.
The traditional electric operating companies and natural gas distribution utilities have various regulatory mechanisms that address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Southern Company system for the foreseeable future. See Note 2 to the financial statements for additional information.
Southern Power's future earnings will depend upon the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as Southern Power's ability to execute its growth strategy and to develop and construct generating facilities. In addition, Southern Power's future earnings will depend upon the availability of federal and state ITCs and PTCs on its renewable energy projects, which could be impacted by future tax legislation. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions," "Construction Programs," and "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
Southern Company's other business activities include providing energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency. Other business activities also include investments in telecommunications, leveraged lease projects, and gas storage facilities. Management continues to evaluate the contribution of each of these activities to total shareholder return and may pursue acquisitions, dispositions, and other strategic ventures or investments accordingly.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Recent Developments
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax).
Alabama Power
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, as well as the acquisition of an existing combined cycle facility for a total capital investment of approximately $1.1 billion. The related costs would be recovered through existing rate mechanisms. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama Power" herein for additional information.
Georgia Power
Rate Case
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, including estimated rate increases totaling $342 million, $181 million, and $386 million effective January 1, 2020, January 1, 2021, and January 1, 2022, respectively. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans2019 ARP" herein for additional information.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric generating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its total project capital cost forecast to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds), with respect to Georgia Power's ownership interest. As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. Following the vote to continue construction, Georgia Power entered into agreements to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and to provide funding with respect to a MEAG Power wholly-owned subsidiary's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics. In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4.
In March 2019, Georgia Power entered into the Amended and Restated Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4, up to approximately $5.130 billion. At December 31, 2019, Georgia Power had a total of $3.8 billion of borrowings outstanding under the related multi-advance credit facilities.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein and Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million related to the Kemper County energy facility, which was suspended in 2017, primarily associated with the expected close out of a DOE contract related to the Kemper County energy facility, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In December 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. Mine reclamation activities are expected to be substantially completed in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion, and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy Facility" and Note 3 to the financial statements for additional information, including remaining contingencies related to the Kemper IGCC.
On November 26, 2019, Mississippi Power filed a base rate case (Mississippi Power 2019 Base Rate Case) with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a 53% average equity ratio and a 7.728% return on investment. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under "Mississippi Power2019 Base Rate Case" for additional information.
Southern Power
During 2019, Southern Power completed construction and achieved commercial operation of the 100-MW Wildhorse Mountain wind facility, acquired and continued construction of the 136-MW Skookumchuck wind facility, and continued construction of the 200-MW Reading wind facility. In addition, Southern Power acquired a majority interest in DSGP, an affiliate of Bloom Energy, that owns and operates fuel cell generation facilities, for a total purchase price of approximately $167 million.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments.
Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Power" and Construction ProgramsSouthern Power" herein for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
During 2019, the natural gas distribution utilities have been involved in the following regulatory proceedings:
On September 25, 2019, the Virginia Commission approved Virginia Natural Gas' Steps to Advance Virginia's Energy (SAVE) program request to amend and extend the program through 2024 with estimated capital spend totaling approximately $365 million.
On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase for Nicor Gas, including $65 million related to the recovery of investments under the Investing in Illinois program, which became effective October 8, 2019.
On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase for Atlanta Gas Light, effective January 1, 2020.
See FUTURE EARNINGS POTENTIAL – "Regulatory MattersSouthern Company GasRate Proceedings" herein and Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
Also during 2019, Southern Company Gas recorded a pre-tax impairment charge of $91 million ($69 million after tax) related to a natural gas storage facility in Louisiana. See Note 3 to the financial statements under "Other MattersSouthern Company Gas" for additional information.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Company Gas" herein for information regarding Southern Company Gas' 2018 disposition activity.
Key Performance Indicators
In striving to achieve attractive risk-adjusted returns while providing cost-effective energy to more than eight million electric and gas utility customers collectively, the traditional electric operating companies and Southern Company Gas continue to focus on several key performance indicators. These indicators include, but are not limited to, customer satisfaction, plant availability, electric and natural gas system reliability, and execution of major construction projects. In addition, Southern Company and the Subsidiary Registrants focus on earnings per share (EPS) and net income, respectively, as a key performance indicator. See RESULTS OF OPERATIONS herein for information on the Registrants' financial performance. See RESULTS OF OPERATIONS – "Southern Company GasOperating Metrics" for additional information on Southern Company Gas' operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
The financial success of the traditional electric operating companies and Southern Company Gas is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. The traditional electric operating companies use customer satisfaction surveys to evaluate their results and generally target the top quartile of these surveys in measuring performance. Reliability indicators are also used to evaluate results. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate RSE" and " – Mississippi PowerPerformance Evaluation Plan" herein for additional information on Alabama Power's Rate RSE and Mississippi Power's PEP rate plan, respectively, both of which contain mechanisms that directly tie customer service indicators to the allowed equity return.
Southern Power continues to focus on several key performance indicators, including, but not limited to, the equivalent forced outage rate and contract availability to evaluate operating results and help ensure its ability to meet its contractual commitments to customers.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

RESULTS OF OPERATIONS
Southern Company
Consolidated net income attributable to Southern Company was $4.7 billion in 2019, an increase of $2.5 billion, or 112.9%, from the prior year. The increase was primarily due to the $2.6 billion ($1.4 billion after tax) gain on the sale of Gulf Power in 2019 and a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4. See "Electricity BusinessEstimated Loss on Plants Under Construction" herein and Notes 2 and 15 to the financial statements under "Georgia PowerNuclear Construction" and "Southern Company," respectively, for additional information.
Basic EPS was $4.53 in 2019 and $2.18 in 2018. Diluted EPS, which factors in additional shares related to stock-based compensation, was $4.50 in 2019 and $2.17 in 2018. EPS for 2019 and 2018 was negatively impacted by $0.11 and $0.04 per share, respectively, as a result of increases in the average shares outstanding. See Note 8 to the financial statements under "Outstanding Classes of Capital Stock – Southern Company" for additional information.
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $419 million, $417 million,$2.46 in 2019 and $383 million$2.38 in 2016, 2015, and 2014, respectively.2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. For 2019, the dividend payout ratio was 54% compared to 109% for 2018. The "All Other" column includesdecrease was due to the increase in earnings in 2019.
Discussion of Southern Company's results of operations is divided into three parts – the Southern Company system's primary business of electricity sales, its gas business, and its other business activities.
 2019 2018
 (in millions)
Electricity business$3,268
 $2,304
Gas business585
 372
Other business activities886
 (450)
Net Income$4,739
 $2,226
Electricity Business
Southern Company's electric utilities generate and sell electricity to retail and wholesale customers. The results of operations discussed below include the results of Gulf Power through December 31, 2018. See Note 15 to the financial statements under "Southern Company" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income for the electricity business follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Electric operating revenues$17,095
 $(1,476)
Fuel3,622
 (1,015)
Purchased power816

(155)
Cost of other sales76
 10
Other operations and maintenance4,479
 (156)
Depreciation and amortization2,472
 (93)
Taxes other than income taxes1,011
 (87)
Estimated loss on plants under construction24
 (1,073)
Impairment charges3
 (153)
(Gain) loss on dispositions, net(21) (21)
Total electric operating expenses12,482
 (2,743)
Operating income4,613
 1,267
Allowance for equity funds used during construction121
 (10)
Interest expense, net of amounts capitalized987
 (48)
Other income (expense), net234
 90
Income taxes708
 501
Net income3,273
 894
Less:   
Dividends on preferred and preference stock of subsidiaries15
 (1)
Net income (loss) attributable to noncontrolling interests(10) (69)
Net Income Attributable to Southern Company$3,268
 $964
Electric Operating Revenues
Electric operating revenues for 2019 were $17.1 billion, reflecting a $1.5 billion decrease from 2018. Details of electric operating revenues were as follows:
 2019 2018
 (in millions)
Retail electric — prior year$15,222
  
Estimated change resulting from —   
Rates and pricing581
  
Sales decline(143)  
Weather29
  
Fuel and other cost recovery(392)  
Gulf Power disposition(1,213)  
Retail electric — current year14,084
 $15,222
Wholesale electric revenues2,152
 2,516
Other electric revenues636
 664
Other revenues223
 169
Electric operating revenues$17,095
 $18,571
Percent change(7.9)% 0.2%
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Retail electric revenues decreased $1.1 billion, or 7.5%, in 2019 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 2019 was primarily due to the impacts of Alabama Power's customer bill credits issued in 2018 related to the Tax Reform Legislation, additional capital investments recovered through Rate CNP Compliance, and lower Rate RSE customer refund in 2019 as compared to the prior year; Georgia Power's higher contributions from commercial and industrial customers with variable demand-driven pricing, NCCR rate increase effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018; and Mississippi Power's PEP and ECO Plan rate increases effective for the first billing cycle of September 2018.
Electric rates for the traditional electric operating companies include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of PPA costs, and do not affect net income. The traditional electric operating companies each have one or more regulatory mechanisms to recover other costs such as environmental and other compliance costs, storm damage, new plants, and PPA capacity costs.
See Note 2 to the financial statements under "Alabama Power," "Georgia Power," and "Mississippi Power" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Wholesale electric revenues consist of PPAs and short-term opportunity sales. Wholesale electric revenues from PPAs (other than solar and wind PPAs) have both capacity and energy components. Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment. Energy revenues will vary depending on fuel prices, the market prices of wholesale energy compared to the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Energy sales from solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or through a fixed price related to the energy. As a result, the ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Wholesale electric revenues at Mississippi Power include FERC-regulated MRA sales as well as market-based sales. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Southern Company system's variable cost to produce the energy.
Wholesale electric revenues from power sales were as follows:
 2019 2018
 (in millions)
Capacity and other$529
 $620
Energy1,623
 1,896
Total$2,152
 $2,516
In 2019, wholesale revenues decreased $364 million, or 14.5%, as compared to the prior year due to decreases of $273 million in energy revenues and $91 million in capacity revenues. Excluding the $28 million decrease associated with the sale of Gulf Power, energy revenues decreased $165 million at Southern Power and $80 million at the traditional electric operating companies. The decrease at Southern Power related to a $113 million decrease primarily in non-PPA short-term sales and a decrease in the market price of energy, as well as a $51 million decrease primarily in sales under PPAs from natural gas facilities. The decrease at the traditional electric operating companies was primarily due to lower natural gas prices. Excluding the $26 million decrease associated with the sale of Gulf Power, the decrease in capacity revenues was primarily related to the sales of Southern Power's Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) in December 2018 and Southern Power's Plant Nacogdoches in June 2019. See Note 15 to the financial statements for additional information.
Other Electric Revenues
Other electric revenues decreased $28 million, or 4.2%, in 2019 as compared to the prior year. The decrease was primarily due to a decrease of $66 million related to the sale of Gulf Power, partially offset by increases at Georgia Power of $13 million in regulated power delivery construction and maintenance contracts and $11 million from outdoor lighting LED conversions and sales, as well as an increase at Alabama Power of $9 million from pole attachment agreements.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
       
Adjusted(b)
 Total
KWHs
 Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
(a)
 Total KWH Percent Change 
Weather-Adjusted Percent Change(a)
 (in billions)        
Residential48.5
 (11.1)% (10.7)% (1.1)% (0.8)%
Commercial49.1
 (8.1) (8.6) (1.1) (1.6)
Industrial50.1
 (6.1) (6.1) (2.9) (2.9)
Other0.8
 (9.1) (9.0) (5.8) (5.7)
Total retail148.5
 (8.5) (8.4)% (1.7) (1.8)%
Wholesale48.0
 (3.9)   (2.6)  
Total energy sales196.5
 (7.4)%   (1.9)%  
(a)Weather-adjusted KWH sales are estimated by removing from KWH sales the effect of deviations from normal temperature conditions, based on statistical models of the historical relationship between temperatures and energy sales. Normal temperature conditions are defined as those experienced in the applicable service territory over a specified historical period. This metric is useful because it allows trends in historical operations to be evaluated apart from the influence of weather conditions. Management also considers this metric in developing long-term capital and financial plans.
(b)Kilowatt-hour sales comparisons to the prior year were significantly impacted by the disposition of Gulf Power on January 1, 2019. These changes exclude Gulf Power.
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Excluding the impact of the Gulf Power disposition on January 1, 2019, weather-adjusted retail energy sales decreased 2.7 billion KWHs in 2019 as compared to the prior year primarily due to lower customer usage. Weather-adjusted residential usage decreases are primarily attributable to an increase in energy-efficient residential appliances and energy saving initiatives, partially offset by customer growth. Weather-adjusted commercial usage decreases are primarily attributable to an increase in energy saving initiatives and an ongoing migration to the electronic commerce business model. Industrial usage decreases are a result of changes in production levels primarily in the primary metals, paper, chemicals, and textiles sectors.
See "Electric Operating Revenues" above for a discussion of significant changes in wholesale revenues related to changes in price and KWH sales.
Other Revenues
Other revenues increased $54 million, or 32.0%, in 2019 as compared to the prior year. The increase was primarily due to increases at Georgia Power of $20 million from unregulated sales associated with new energy conservation projects and $14 million from unregulated power delivery construction and maintenance contracts, as well as an increase at Alabama Power of $11 million in unregulated sales of products and services.
Fuel and Purchased Power Expenses
The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the electric utilities purchase a portion of their electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the Southern Company system's generation and purchased power were as follows:
 2019 
2018(a)
Total generation (in billions of KWHs)
187
 191
Total purchased power (in billions of KWHs)
18
 14
Sources of generation (percent) —

 
Gas52
 48
Coal22
 27
Nuclear16
 16
Hydro3
 3
Other7
 6
Cost of fuel, generated (in cents per net KWH) 

 
Gas2.36
 2.76
Coal2.87
 2.93
Nuclear0.79
 0.80
Average cost of fuel, generated (in cents per net KWH)
2.20
 2.46
Average cost of purchased power (in cents per net KWH)(b)
5.01
 5.94
(a)Excludes Gulf Power, which was sold on January 1, 2019.
(b)Average cost of purchased power includes fuel purchased by the Southern Company system for tolling agreements where power is generated by the provider.
In 2019, total fuel and purchased power expenses were $4.4 billion, a decrease of $1.2 billion, or 20.9%, as compared to the prior year. Excluding approximately $511 million associated with the sale of Gulf Power, the decrease was primarily the result of a $575 million decrease in the average cost of fuel and purchased power and an $84 million net decrease in the volume of KWHs generated and purchased.
Fuel and purchased power energy transactions at the traditional electric operating companies are generally offset by fuel revenues and do not have a significant impact on net income. See FUTURE EARNINGS POTENTIAL – "Regulatory Matters" herein for additional information. Fuel expenses incurred under Southern Power's PPAs are generally the responsibility of the counterparties and do not significantly impact net income.
Fuel
In 2019, fuel expense was $3.6 billion, a decrease of $1.0 billion, or 21.9%, as compared to the prior year. Excluding approximately $309 million related to Gulf Power in 2018, the decrease was primarily due to an 18.1% decrease in the volume of KWHs generated by coal, a 14.5% decrease in the average cost of natural gas per KWH generated, and a 2.1% decrease in the average cost of coal per KWH generated, partially offset by a 5.0% increase in the volume of KWHs generated by natural gas.
Purchased Power
In 2019, purchased power expense was $816 million, a decrease of $155 million, or 16.0%, as compared to the prior year. Excluding approximately $202 million associated with the sale of Gulf Power, the change was primarily due to a 9.6% increase in the volume of KWHs purchased, partially offset by a 15.7% decrease in the average cost of KWH purchased.
Energy purchases will vary depending on demand for energy within the Southern Company system's electric service territory, the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, and the availability of the Southern Company system's generation.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $156 million, or 3.4%, in 2019 as compared to the prior year. The decrease reflects approximately $356 million related to Gulf Power in 2018 and $17 million related to the dispositions of Southern Power's Florida Plants and Plant Nacogdoches, partially offset by additional accruals of $123 million to the NDR at Alabama Power, $21 million of increased transmission and distribution expenses primarily due to overhead line maintenance and vegetation management at the traditional electric operating companies, $18 million from costs associated with unregulated sales at Georgia Power primarily associated with new energy conservation projects and power delivery construction and maintenance contracts, and $16 million related to an adjustment for FERC fees at Georgia Power following the conclusion of a multi-year audit of
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

headwater benefits associated with hydro facilities. See Notes 2 and 15 to the financial statements under "Alabama Power – Rate NDR" and "Southern PowerSales of Natural Gas and Biomass Plants," respectively, for additional information.
Depreciation and Amortization
Depreciation and amortization decreased $93 million, or 3.6%, in 2019 as compared to the prior year. The decrease was primarily due to a decrease of $191 million related to Gulf Power in 2018, partially offset by an increase in depreciation of $62 million primarily resulting from additional plant in service and an increase in the amortization of regulatory assets of $47 million primarily at Mississippi Power and Georgia Power. See Note 2 to the financial statements under "Southern CompanyRegulatory Assets and Liabilities" and Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
Taxes other than income taxes decreased $87 million, or 7.9%, in 2019 as compared to the prior year primarily due to a decrease of $118 million related to the sale of Gulf Power, partially offset by higher property taxes of $30 million primarily at Georgia Power.
Estimated Loss on Plants Under Construction
The $1.1 billion charge in 2018 reflects Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. The 2019 charges of $24 million were associated with abandonment and closure activities for the mine and gasifier-related assets of the Kemper IGCC at Mississippi Power, net of sales proceeds. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" and "Mississippi PowerKemper County Energy Facility" for additional information.
Impairment Charges
In the second quarter 2018, Southern Power recorded a $119 million asset impairment charge related to the sale of the Florida Plants and in the third quarter 2018 recorded a $36 million asset impairment charge on wind turbine equipment held for development projects. Asset impairment charges recorded in 2019 were immaterial. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information.
(Gain) Loss on Dispositions, Net
Gain on dispositions, net increased $21 million in 2019 as compared to the prior year primarily due to Southern Power's sale of Plant Nacogdoches in the second quarter 2019. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized decreased $48 million, or 4.6%, in 2019 as compared to the prior year primarily related to the sale of Gulf Power.
Other Income (Expense), Net
Other income (expense), net increased $90 million, or 62.5%, in 2019 as compared to the prior year primarily due to a $36 million gain arising from the Roserock solar facility litigation settlement at Southern Power in 2019, $37 million from decreased charitable donations in 2019 at the traditional electric operating companies, $23 million of increased non-service cost-related retirement benefits income, and $16 million of increased interest income primarily associated with a new tolling arrangement accounted for as a sales-type lease at Mississippi Power as well as temporary cash investments, primarily at Alabama Power. These increases were partially offset by $24 million related to the settlement of Mississippi Power's Deepwater Horizon claim in 2018 and a $14 million gain from a joint-development wind project at Southern Power in 2018 attributable to its partner in the project. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and "Other Matters– Mississippi Power" and Note 11 to the financial statements under "Pension Plans" for additional information.
Income Taxes
Income taxes increased $501 million, or 242.0%, in 2019 as compared to the prior year. Excluding an income tax benefit of approximately $20 million related to Gulf Power in 2018, income taxes increased $481 million. The increase was primarily due to increases in pre-tax earnings, including the $1.1 billion charge in 2018 associated with Plant Vogtle Units 3 and 4 construction at Georgia Power. See Notes 10 and 15 to the financial statements for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Net Income Attributable to Noncontrolling Interests
Substantially all noncontrolling interests relate to renewable projects at Southern Power. Net income attributable to noncontrolling interests decreased $69 million, or 116.9%, in 2019, as compared to the prior year. The decrease was primarily due to $92 million of losses attributable to noncontrolling interests related to the tax equity partnerships entered into in 2018 and $14 million attributable to a joint-development wind project in 2018, partially offset by an allocation of approximately $29 million of income to the noncontrolling interest partner related to the Roserock solar facility litigation settlement. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and Note 7 to the financial statements under "Southern Power" for additional information regarding the litigation settlement and tax equity partnerships, respectively.
Gas Business
Southern Company Gas distributes natural gas through utilities in four states and is involved in several other complementary businesses including gas pipeline investments, wholesale gas services, and gas marketing services.
A condensed statement of income for the gas business follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$3,792
 $(117)
Cost of natural gas1,319
 (220)
Cost of other sales
 (12)
Other operations and maintenance888
 (93)
Depreciation and amortization487
 (13)
Taxes other than income taxes213
 2
Impairment charges115
 73
(Gain) loss on dispositions, net
 291
Total operating expenses3,022
 28
Operating income770
 (145)
Earnings from equity method investments157
 9
Interest expense, net of amounts capitalized232
 4
Other income (expense), net20
 19
Income taxes130
 (334)
Net income$585
 $213
The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for 2019 compared to 2018. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Southern Company Gas Dispositions.
Seasonality of Results
During the period from November through March when natural gas usage and operating revenues are generally higher (Heating Season), more customers are connected to Southern Company Gas' distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively equally over any given year. Thus, operating results can vary significantly from quarter to quarter as a result of seasonality. For 2019, the percentage of operating revenues and net income generated during the Heating Season (January through March and November through December) were 68.7% and 86.8%, respectively. For 2018, the percentage of operating revenues and net income generated during the Heating Season were 68.7% and 96.0%, respectively.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues in 2019 were $3.8 billion, a $117 million decrease compared to 2018. Details of operating revenues were as follows:
 2019
 (in millions)
Operating revenues – prior year$3,909
Estimated change resulting from –
Infrastructure replacement programs and base rate changes96
Gas costs and other cost recovery(89)
Wholesale gas services150
Southern Company Gas Dispositions(*)
(300)
Other26
Operating revenues – current year$3,792
Percent change(3.0)%
(*)
Includes a $245 million decrease related to natural gas revenues, including alternative revenue programs, and a $55 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2019 compared to the prior year primarily due to increases of $74 million at Nicor Gas and $16 million at Atlanta Gas Light. These amounts include the natural gas distribution utilities' continued investments recovered through infrastructure replacement programs and base rate increases as well as customer refunds in 2018 as a result of the Tax Reform Legislation. See Note 2 to the financial statements under "Southern Company Gas" for additional information.
Revenues attributable to gas costs and other cost recovery decreased in 2019 compared to the prior year primarily due to lower natural gas prices and decreased volumes of natural gas sold. Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities.
Revenues from wholesale gas services increased in 2019 primarily due to derivative gains, partially offset by decreased commercial activity.
Other natural gas revenues increased in 2019 primarily due to increases in customers at the natural gas distribution utilities and recovery of prior period hedge losses at gas marketing services.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, the natural gas distribution utilities charge their utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. The natural gas distribution utilities defer or accrue the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities. Cost of natural gas at the natural gas distribution utilities represented 84.5% of the total cost of natural gas for 2019.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
In 2019, cost of natural gas was $1.3 billion, a decrease of $220 million, or 14.3%, compared to the prior year. Excluding a $106 million decrease related to the Southern Company Gas Dispositions, cost of natural gas decreased by $114 million, which reflects a 14.8% decrease in natural gas prices compared to 2018.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Cost of Other Sales
Cost of other sales related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $93 million, or 9.5%, in 2019 compared to the prior year. Excluding a $65 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses decreased $28 million. This decrease was primarily due to $28 million of disposition-related costs incurred during 2018, a $12 million adjustment in 2018 for the adoption of a new paid time off policy, an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions in 2018, and a $7 million decrease in compensation and benefits costs, partially offset by a $22 million increase in rider expenses, primarily at Nicor Gas, passed through directly to customers. See FUTURE EARNINGS POTENTIAL – "Southern Company GasUtility Regulation and Rate Design" herein for additional information.
Depreciation and Amortization
Depreciation and amortization decreased $13 million, or 2.6%, in 2019 compared to the prior year. Excluding a $27 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $14 million. This increase was primarily due to continued infrastructure investments at the natural gas distribution utilities, partially offset by accelerated depreciation related to assets retired in 2018. See Note 2 to the financial statements under "Southern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information.
Impairment Charges
In 2019, Southern Company Gas recorded impairment charges of $91 million related to a natural gas storage facility in Louisiana and $24 million in contemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. In 2018, a goodwill impairment charge of $42 million was recorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1, 3, and 15 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities," "Other MattersSouthern Company Gas," and "Southern Company Gas," respectively, for additional information.
(Gain) Loss on Dispositions, Net
Gain on dispositions, net was $291 million in 2018 and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
Earnings from equity method investments increased $9 million, or 6.1%, in 2019 compared to the prior year and reflect higher earnings from SNG as a result of rate increases that became effective September 2018, partially offset by a $6 million pre-tax loss on the sale of Triton in May 2019. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $19 million in 2019 compared to the prior year. This increase primarily resulted from a $23 million decrease in charitable donations in 2019.
Income Taxes
Income taxes decreased $334 million, or 72.0%, in 2019 compared to the prior year. This decrease primarily reflects a reduction of $348 million related to the Southern Company Gas Dispositions, as well as $29 million in benefits associated with impairment charges in 2019 and additional benefits from the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light as previously authorized by the Georgia PSC, partially offset by $48 million of additional taxes associated with increased pre-tax earnings at wholesale gas services.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information. Also see Notes 2, 3, and 15 to the financial statements under "Southern Company Gas," "Other MattersSouthern Company Gas," and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on Atlanta Gas Light's regulatory treatment of the impacts of the Tax Reform Legislation and the impairment charges.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Other Business Activities
Southern Company's other business activities primarily include the parent entity, whichcompany (which does not allocate operating expenses to business segments. Also, this category includes segments below the quantitative threshold for separate disclosure. These segments include providingunits); PowerSecure, a provider of energy technologies and servicessolutions to electric utilities and large industrial, commercial, institutional,their customers in the areas of distributed generation, energy storage and municipal customers; as well as investmentsrenewables, and energy efficiency; Southern Holdings, which invests in telecommunications andvarious projects, including leveraged lease projects. Allprojects; and Southern Linc, which provides digital wireless communications for use by the Southern Company system and also markets these services to the public and provides fiber optics services within the Southeast.
A condensed statement of income for Southern Company's other inter-segmentbusiness activities follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$532
 $(483)
Cost of other sales359
 (369)
Other operations and maintenance233
 (40)
Depreciation and amortization79
 13
Taxes other than income taxes6
 
Impairment charges50
 38
(Gain) loss on dispositions, net(2,548) (2,548)
Total operating expenses(1,821) (2,906)
Operating income (loss)2,353
 2,423
Interest expense517
 (62)
Other income (expense), net10
 33
Income taxes (benefit)960
 1,182
Net income (loss)$886
 $1,336
Operating Revenues
Southern Company's operating revenues are not material. Financial data for these other business segmentsactivities decreased $483 million, or 47.6%, in 2019 as compared to the prior year primarily related to PowerSecure's 2018 storm restoration services in Puerto Rico and productsthe sale of PowerSecure's utility infrastructure services business in June 2019.
Cost of Other Sales
Cost of other sales for these other business activities decreased $369 million, or 50.7%, in 2019 as compared to the prior year primarily related to PowerSecure's 2018 storm restoration services in Puerto Rico and the sale of PowerSecure's utility infrastructure services business in June 2019.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses for these other business activities decreased $40 million, or 14.7%, in 2019 as compared to the years ended December 31, 2016, 2015,prior year. The decrease was primarily due to PowerSecure's lower employee compensation and 2014 was as follows:benefits in 2019 and 2018 storm restoration services in Puerto Rico.
Impairment Charges
In 2019, goodwill and asset impairment charges totaling $50 million were recorded related to the sale of PowerSecure's utility infrastructure services and lighting businesses. In 2018, asset impairment charges of $12 million associated with Southern Linc's tower leases were recorded in contemplation of the sale of Gulf Power.
(Gain) Loss on Dispositions, Net
The 2019 gain on dispositions, net primarily relates to the gain of $2.6 billion ($1.4 billion after tax) on the sale of Gulf Power. See Note 15 to the financial statements under "Southern Company" for additional information.
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report


Interest Expense
Interest expense for these other business activities decreased $62 million, or 10.7%, in 2019 as compared to the prior year primarily due to a decrease in average outstanding long-term debt at the parent company. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net for these other business activities increased $33 million in 2019 as compared to the prior year primarily due to a $43 million decrease in charitable donations at the parent company, partially offset by a $17 million impairment charge associated with a leveraged lease at Southern Holdings in 2019. See Notes 1 and 3 to the financial statements under "Leveraged Leases" and "Other MattersSouthern Company," respectively, for additional information.
Income Taxes (Benefit)
The income tax for these other business activities increased $1.2 billion in 2019 as compared to the prior year primarily due to the tax impacts related to the sale of Gulf Power. See Note 10 to the financial statements and Note 15 to the financial statements under "Southern Company" for additional information.
Alabama Power
Alabama Power's 2019 net income after dividends on preferred and preference stock was $1.07 billion, representing a $140 million, or 15.1%, increase over the previous year. The increase was primarily due to an increase in retail revenues associated with the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and a lower Rate RSE customer refund in 2019 as compared to the prior year, as well as additional capital investments recovered through Rate CNP Compliance. The increase in revenue is partially offset by increases in operations and maintenance and depreciation expenses and lower customer usage. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate RSE" and " – Rate CNP Compliance" herein for additional information.
A condensed income statement for Alabama Power follows:
 Electric Utilities    
 
Traditional
Electric
Operating
Companies
Southern
Power
EliminationsTotalSouthern Company Gas
All
Other
EliminationsConsolidated
 (in millions)
2016        
Operating revenues$16,803
$1,577
$(439)$17,941
$1,652
$463
$(160)$19,896
Depreciation and amortization1,881
352

2,233
238
31

2,502
Interest income6
7

13
2
20
(15)20
Earnings from equity method investments2


2
60
(3)
59
Interest expense814
117

931
81
317
(12)1,317
Income taxes1,286
(195)
1,091
76
(216)
951
Segment net income (loss)(a) (b)
2,233
338

2,571
114
(230)(7)2,448
Total assets72,141
15,169
(316)86,994
21,853
2,474
(1,624)109,697
Gross property additions4,852
2,114

6,966
618
41
(1)7,624
2015        
Operating revenues$16,491
$1,390
$(439)$17,442
$
$152
$(105)$17,489
Depreciation and amortization1,772
248

2,020

14

2,034
Interest income19
2
1
22

6
(5)23
Earnings from equity method investments1


1

(1)

Interest expense697
77

774

69
(3)840
Income taxes1,305
21

1,326

(132)
1,194
Segment net income (loss)(a) (b)
2,186
215

2,401

(32)(2)2,367
Total assets69,052
8,905
(397)77,560

1,819
(1,061)78,318
Gross property additions5,124
1,005

6,129

40

6,169
2014        
Operating revenues$17,354
$1,501
$(449)$18,406
$
$159
$(98)$18,467
Depreciation and amortization1,709
220

1,929

16

1,945
Interest income17
1

18

3
(2)19
Earnings from equity method investments1


1

(1)

Interest expense705
89

794

43
(2)835
Income taxes1,056
(3)
1,053

(76)
977
Segment net income (loss)(a) (b)
1,797
172

1,969

(3)(3)1,963
Total assets(c)
64,300
5,233
(131)69,402

1,143
(312)70,233
Gross property additions5,568
942

6,510

11
1
6,522
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$6,125
 $93
Fuel1,112
 (189)
Purchased power403
 (29)
Other operations and maintenance1,821
 152
Depreciation and amortization793
 29
Taxes other than income taxes403
 14
Total operating expenses4,532
 (23)
Operating income1,593
 116
Allowance for equity funds used during construction52
 (10)
Interest expense, net of amounts capitalized336
 13
Other income (expense), net46
 26
Income taxes270
 (21)
Net income1,085
 140
Dividends on preferred and preference stock15
 
Net income after dividends on preferred and preference stock$1,070
 $140
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were $6.1 billion, reflecting a $0.1 billion increase from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$5,367
  
Estimated change resulting from —   
Rates and pricing347
  
Sales decline(79)  
Weather(3)  
Fuel and other cost recovery(131)  
Retail — current year5,501
 $5,367
Wholesale revenues —   
Non-affiliates258
 279
Affiliates81
 119
Total wholesale revenues339
 398
Other operating revenues285
 267
Total operating revenues$6,125
 $6,032
Percent change1.5% (0.1)%
Retail revenues in 2019 were $5.5 billion. These revenues increased $134 million, or 2.5%, in 2019 as compared to the prior year. The increase in 2019 was primarily due to increases in rates and pricing associated with the impact of customer bill credits issued in 2018 related to the Tax Reform Legislation and additional capital investments recovered through Rate CNP Compliance, as well as a lower Rate RSE customer refund in 2019 as compared to the prior year, partially offset by decreases in fuel revenues and customer usage, as well as milder weather in 2019 as compared to 2018.
See Note 2 to the financial statements under "Alabama PowerRate RSE" and " – Rate CNP Compliance" for additional information. See "Energy Sales" herein for a discussion of changes in the volume of energy sold, including changes related to sales decline and weather.
Electric rates include provisions to recognize the recovery of fuel costs, purchased power costs, PPAs certificated by the Alabama PSC, and costs associated with the natural disaster reserve. Under these provisions, fuel and other cost recovery revenues generally equal fuel and other cost recovery expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate ECR" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2019 2018
 (in millions)
Capacity and other$102
 $101
Energy156
 178
Total non-affiliated$258
 $279
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Alabama Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not affect net income. Short-term opportunity energy sales are also included in wholesale energy sales to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Alabama Power's variable cost to produce the energy.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In 2019, wholesale revenues from sales to non-affiliates decreased $21 million, or 7.5%, as compared to the prior year primarily as a result of an 8.2% decrease in energy prices due to lower natural gas prices, partially offset by a 1% increase in the amount of KWHs sold.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales and purchases are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost and energy purchases are generally offset by energy revenues through Alabama Power's energy cost recovery clause.
In 2019, wholesale revenues from sales to affiliates decreased $38 million, or 31.9%, as compared to the prior year. In 2019, KWH sales decreased 22.7% due to the decreased availability of coal generation associated with the retirement of Plant Gorgas Units 8, 9, and 10, and the price of energy decreased 11.8% as a result of lower natural gas prices.
In 2019, other operating revenues increased $18 million, or 6.7%, as compared to the prior year primarily due to an increase in unregulated sales of products and services and pole attachment agreements.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 (in billions)    
Residential18.3
 (1.9)% (1.5)%
Commercial13.6
 (2.2) (2.2)
Industrial22.1
 (3.7) (3.7)
Other0.2
 (7.3) (7.3)
Total retail54.2
 (2.8) (2.6)%
Wholesale     
Non-affiliates5.1
 1.2
  
Affiliates3.5
 (22.7)  
Total wholesale8.6
 (10.1)  
Total energy sales62.8
 (3.8)%  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales in 2019 decreased 2.8% primarily due to lower customer usage and milder weather in 2019 compared to 2018. Weather-adjusted residential sales were 1.5% lower in 2019 primarily due to lower customer usage resulting from an increase in penetration of energy-efficient residential appliances, partially offset by customer growth. Weather-adjusted commercial sales were 2.2% lower in 2019 primarily due to lower customer usage resulting from customer initiatives in energy savings and an ongoing migration to the electronic commerce business model, partially offset by customer growth. Industrial sales decreased 3.7% in 2019 as compared to 2018 primarily as a result of changes in production levels in the primary metals and chemicals sectors.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues from sales to non-affiliates and wholesale revenues from sales to affiliated companies related to changes in price and KWH sales.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by the unit cost of fuel consumed, demand, and the availability of generating units. Additionally, Alabama Power purchases a portion of its electricity needs from the wholesale market.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Alabama Power's generation and purchased power were as follows:
 2019 2018
Total generation (in billions of KWHs)
56.9
 60.5
Total purchased power (in billions of KWHs)
9.4
 8.1
Sources of generation (percent) —
   
Coal45
 50
Nuclear25
 23
Gas21
 19
Hydro9
 8
Cost of fuel, generated (in cents per net KWH) —
   
Coal2.69
 2.73
Nuclear0.77
 0.77
Gas2.47
 2.84
Average cost of fuel, generated (in cents per net KWH)(a)(b)
2.11
 2.26
Average cost of purchased power (in cents per net KWH)(c)
4.39
 5.47
(a)Attributable
For 2018, cost of fuel, generated and average cost of fuel, generated excludes a $30 million adjustment associated with a May 2018 Alabama PSC accounting order related to excess deferred income taxes. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerTax Reform Accounting Order" herein for additional information.
(b)KWHs generated by hydro are excluded from the average cost of fuel, generated.
(c)Average cost of purchased power includes fuel, energy, and transmission purchased by Alabama Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $1.5 billion in 2019, a decrease of $218 million, or 12.6%, compared to 2018. The decrease was primarily due to a $102 million decrease in the average cost of purchased power, a $56 million decrease in the average cost of fuel, a $30 million net decrease related to the volume of KWHs purchased and generated, and a $30 million decrease in fuel expense associated with the May 2018 Alabama PSC accounting order.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through Alabama Power's energy cost recovery clause. Alabama Power, along with the Alabama PSC, continuously monitors the under/over recovered balance to determine whether adjustments to billing rates are required. See Note 2 to the financial statements under "Alabama PowerRate ECR" for additional information.
Fuel
Fuel expenses were $1.1 billion in 2019, a decrease of $189 million, or 14.5%, compared to 2018. The decrease was primarily due to a 13% decrease in the average cost of KWHs generated by natural gas, which excludes tolling agreements, a 14.4% decrease in the volume of KWHs generated by coal, and a 5.2% increase in the volume of KWHs generated by hydro, as well as a $30 million decrease in fuel expense associated with the May 2018 Alabama PSC accounting order.
Purchased Power Non-Affiliates
Purchased power expense from non-affiliates was $203 million in 2019, a decrease of $13 million, or 6.0%, compared to 2018. This decrease was primarily due to a 12.6% decrease in the average cost per KWH purchased due to lower natural gas prices. The decrease was partially offset by a 9.1% increase in the amount of energy purchased as a result of decreased coal generation due to the retirement of Plant Gorgas Units 8, 9, and 10.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation.
Purchased Power Affiliates
Purchased power expense from affiliates was $200 million in 2019, a decrease of $16 million, or 7.4%, compared to 2018. This decrease was primarily due to a 25.2% decrease in the average cost per KWH purchased due to lower natural gas prices. The decrease was partially offset by a 24.1% increase in the amount of energy purchased primarily due to the availability of lower-cost
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

generation compared to Alabama Power's owned generation and a decrease in coal generation due to the retirement of Plant Gorgas Units 8, 9, and 10.
Energy purchases from affiliates will vary depending on demand for energy and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses increased $152 million, or 9.1%, as compared to the prior year primarily due to additional accruals of $123 million to the NDR as well as $11 million in Rate CNP Compliance-related expenses. See Note 2 to the financial statements under "Alabama Power – Rate NDR" and " – Rate CNP Compliance" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $29 million, or 3.8%, in 2019 as compared to the prior year primarily due to additional plant in service. See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $26 million, or 130.0%, in 2019 as compared to the prior year primarily due to a decrease of $17 million in charitable donations and an increase of $9 million in interest income from temporary cash investments.
Income Taxes
Income taxes decreased $21 million, or 7.2%, in 2019 as compared to the prior year primarily due to additional benefits from the flowback of excess deferred income taxes in accordance with an Alabama PSC accounting order, partially offset by an increase in pre-tax net income. See Note 2 to the financial statements under "Alabama Power – Tax Reform Accounting Order" for additional information.
Georgia Power
Georgia Power's 2019 net income was $1.7 billion, representing a $927 million, or 116.9%, increase from the previous year. The increase was primarily due to a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4, an increase in retail base revenues associated with higher contributions from commercial and industrial customers with variable demand-driven pricing, and an increase in other revenues primarily related to unregulated sales. Partially offsetting the increase were higher non-fuel operations and maintenance expenses and depreciation and amortization.
A condensed income statement for Georgia Power follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$8,408
 $(12)
Fuel1,444
 (254)
Purchased power1,096
 (57)
Other operations and maintenance1,972
 112
Depreciation and amortization981
 58
Taxes other than income taxes454
 17
Estimated loss on Plant Vogtle Units 3 and 4
 (1,060)
Total operating expenses5,947
 (1,184)
Operating income2,461
 1,172
Interest expense, net of amounts capitalized409
 12
Other income (expense), net140
 25
Income taxes472
 258
Net income$1,720
 $927
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were $8.4 billion, a $12 million decrease from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$7,752
  
Estimated change resulting from —   
Rates and pricing202
  
Sales decline(66)  
Weather39
  
Fuel cost recovery(220)  
Retail — current year7,707
 $7,752
Wholesale revenues —   
Non-affiliates129
 163
Affiliates11
 24
Total wholesale revenues140
 187
Other operating revenues561
 481
Total operating revenues$8,408
 $8,420
Percent change(0.1)% 1.3%
Retail revenues of $7.7 billion in 2019 decreased $45 million, or 0.6%, compared to 2018. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing was primarily due to higher contributions from commercial and industrial customers with variable demand-driven pricing, an increase in the NCCR tariff effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information related to the NCCR tariff.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to the sales decline in 2019.
Electric rates include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these fuel cost recovery provisions, fuel revenues generally equal fuel expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerFuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2019 2018
 (in millions)
Capacity and other$55
 $54
Energy74
 109
Total non-affiliated$129
 $163
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amounts billable under the contract terms and provide for recovery of fixed costs and a return on investment. Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Georgia Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Short-term opportunity sales are made at market-based rates that generally provide a margin above Georgia Power's variable cost of energy.
Wholesale revenues from non-affiliated sales decreased $34 million, or 20.9%, in 2019 as compared to 2018 primarily due to lower energy prices and lower demand.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost. In 2019, wholesale revenues from sales to affiliates decreased $13 million, or 54.2%, as compared to 2018 primarily due to a 36.3% decrease in KWH sales as a result of the lower market cost of available energy compared to the cost of Georgia Power-owned generation.
Other operating revenues increased $80 million, or 16.6%, in 2019 from the prior year primarily due to revenue increases of $27 million from power delivery construction and maintenance contracts, $20 million from unregulated sales associated with new energy conservation projects, $11 million from outdoor lighting LED conversions and sales, $7 million from OATT sales, and $6 million in wholesale operating fees associated with contractual targets.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 (in billions)    
Residential28.2
 (0.5)% (0.4)%
Commercial32.8
 (0.4) (1.3)
Industrial23.2
 (2.1) (2.2)
Other0.5
 (5.6) (5.5)
Total retail84.7
 (0.9) (1.2)%
Wholesale     
Non-affiliates2.7
 (15.8)  
Affiliates0.3
 (36.3)  
Total wholesale3.0
 (18.7)  
Total energy sales87.7
 (1.7)%  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers.
In 2019, weather-adjusted residential and commercial KWH sales decreased 0.4% and 1.3%, respectively, compared to 2018 primarily due to a decline in average customer usage resulting from an increase in energy saving initiatives. The decreases in weather-adjusted residential and commercial KWH sales were largely and partially, respectively, offset by customer growth. Weather-adjusted industrial KWH sales decreased 2.2% primarily due to decreases in the paper, textile, stone, clay, and glass, and lumber sectors, partially offset by an increase in the pipeline sector.
See "Operating Revenues" above for a discussion of significant changes in wholesale sales to non-affiliates and affiliated companies.
Fuel and Purchased Power Expenses
Fuel costs constitute one of the largest expenses for Georgia Power. The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Georgia Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Georgia Power's generation and purchased power were as follows:
 2019 2018
Total generation (in billions of KWHs)
62.6
 65.2
Total purchased power (in billions of KWHs)
29.1
 27.9
Sources of generation (percent) —
   
Gas47
 42
Nuclear26
 25
Coal24
 30
Hydro3
 3
Cost of fuel, generated (in cents per net KWH) 
   
Gas2.42
 2.75
Nuclear0.81
 0.82
Coal3.09
 3.21
Average cost of fuel, generated (in cents per net KWH)
2.16
 2.40
Average cost of purchased power (in cents per net KWH)(*)
4.21
 4.79
(*) Average cost of purchased power includes fuel purchased by Georgia Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $2.5 billion in 2019, a decrease of $311 million, or 10.9%, compared to 2018. The decrease was primarily due to a $289 million decrease related to the average cost of fuel and purchased power.
Fuel and purchased power energy transactions do not have a significant impact on earnings since these fuel expenses are generally offset by fuel revenues through Georgia Power's fuel cost recovery mechanism. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerFuel Cost Recovery" herein for additional information.
Fuel
Fuel expense was $1.4 billion in 2019, a decrease of $254 million, or 15.0%, compared to 2018. The decrease was primarily due to a 10% decrease in the average cost of fuel, primarily related to lower natural gas prices, and a 3.9% decrease in the volume of KWHs generated, primarily due to the lower market cost of energy compared to available Georgia Power resources.
Purchased Power - Non-Affiliates
Purchased power expense from non-affiliates was $521 million in 2019, an increase of $91 million, or 21.2%, compared to 2018. The increase was primarily due to a 53.1% increase in the volume of KWHs purchased primarily due to the lower market cost of energy compared to available Southern Company system resources and warmer weather in the third quarter 2019 resulting in higher customer demand, partially offset by a 22.1% decrease in the average cost per KWH purchased primarily due to lower energy prices.
The volume increase also reflects purchases from Gulf Power which were classified as affiliate prior to January 1, 2019. See Note 15 to the financial statements for information regarding the sale of Gulf Power.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Purchased Power - Affiliates
Purchased power expense from affiliates was $575 million in 2019, a decrease of $148 million, or 20.5%, compared to 2018. The decrease was primarily due to an 11.1% decrease in the volume of KWHs purchased as Georgia Power units generally dispatched at a lower cost than other Southern Company system resources and a 13.0% decrease in the average cost per KWH purchased resulting from lower energy prices.
The decrease in purchased power expense from affiliates also reflects a change in the classification of capacity expenses of $24 million related to PPAs with Southern Power accounted for as finance leases following the adoption of FASB ASC Topic 842, Leases (ASC 842). In 2019, these expenses are included in depreciation and amortization and interest expense, net of amounts capitalized. The decrease in the volume of KWHs purchased also includes the effect of classifying purchases from Gulf Power as
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

non-affiliate beginning January 1, 2019. See Notes 9 and 15 to the financial statements for additional information regarding ASC 842 and the sale of Gulf Power, respectively.
Energy purchases from affiliates will vary depending on the demand and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, all as approved by the FERC.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses increased $112 million, or 6.0%, compared to 2018. The increase reflects increases in expenses of $30 million from unregulated sales primarily associated with new energy conservation projects and power delivery construction and maintenance contracts, $26 million related to scheduled generation outages, $16 million related to an adjustment for FERC fees following the conclusion of a multi-year audit of headwater benefits associated with hydro facilities, $12 million primarily due to the timing of vegetation management and other transmission-related expenses, and $10 million associated with generation maintenance.
Depreciation and Amortization
Depreciation and amortization increased $58 million, or 6.3%, in 2019 compared to 2018. The increase was primarily due to a $31 million increase in depreciation associated with additional plant in service and a $19 million increase in the amortization of regulatory assets related to the retirement of certain generating units. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerIntegrated Resource Plan" herein for additional information on unit retirements.
The increase also reflects the classification of approximately $9 million related to PPAs with Southern Power accounted for as finance leases following the adoption of ASC 842. In prior periods, the expenses related to these PPAs were included in purchased power, affiliates. See Note 9 to the financial statements for additional information regarding ASC 842.
See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
In 2019, taxes other than income taxes increased $17 million, or 3.9%, compared to 2018 primarily due to higher property taxes of $25 million as a result of increases in the assessed value of property, partially offset by a decrease of $11 million in municipal franchise fees, largely due to adjustments associated with the Georgia Power Tax Reform Settlement Agreement. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans – Tax Reform Settlement Agreement" herein for additional information.
Estimated Loss on Plant Vogtle Units 3 and 4
In the second quarter 2018, an estimated probable loss of $1.1 billion was recorded to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See ACCOUNTING POLICIES – "Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4" herein and Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2019, interest expense, net of amounts capitalized increased $12 million, or 3.0%, compared to 2018. The increase was primarily due to the reclassification of $15 million related to PPAs with Southern Power accounted for as finance leases following the adoption of ASC 842 and a $6 million increase in interest expense associated with an increase in outstanding short-term borrowings, partially offset by a $9 million increase in amounts capitalized largely associated with Plant Vogtle Units 3 and 4.
In prior periods, the expenses related to the PPAs with Southern Power were included in purchased power, affiliates. See FINANCIAL CONDITION AND LIQUIDITY – "Sources of Capital" and "Financing Activities" herein for additional information on borrowings, Note 9 to the financial statements for additional information regarding ASC 842, and Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
Other Income (Expense), Net
In 2019, other income (expense), net increased $25 million compared to the prior year primarily due to a $16 million increase in non-service cost-related retirement benefits income and a $13 million decrease in charitable donations, partially offset by a $4 million decrease in interest income from temporary cash investments. See Note 11 to the financial statements for additional information on Georgia Power's net periodic pension and other postretirement benefit costs.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Income Taxes
Income taxes increased $258 million, or 120.6%, in 2019 compared to the prior year primarily as a result of higher pre-tax earnings largely due to the 2018 charge associated with Plant Vogtle Units 3 and 4 construction. This increase was partially offset by additional state ITCs recognized in 2019 and the recognition of a valuation allowance in 2018. See Note 10 to the financial statements for additional information.
Mississippi Power
Mississippi Power's net income after dividends on preferred stock was $139 million in 2019 compared to $235 million in 2018. The change was primarily the result of higher income tax expense following the 2018 partial reversal of a valuation allowance.
A condensed statement of operations follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$1,264
 $(1)
Fuel407
 2
Purchased power20
 (21)
Other operations and maintenance283
 (30)
Depreciation and amortization192
 23
Taxes other than income taxes113
 6
Estimated loss on Kemper IGCC24
 (13)
Total operating expenses1,039
 (33)
Operating income225
 32
Allowance for equity funds used during construction1
 1
Interest expense, net of amounts capitalized69
 (7)
Other income (expense), net12
 (5)
Income taxes (benefit)30
 132
Net income139
 (97)
Dividends on preferred stock
 (1)
Net income after dividends on preferred stock$139
 $(96)
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were approximately $1.3 billion, a $1 million decrease from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$889
  
Estimated change resulting from —   
Rates and pricing31
  
Weather(2)  
Fuel and other cost recovery(41)  
Retail — current year877
 $889
Wholesale revenues —   
Non-affiliates237
 263
Affiliates132
 91
Total wholesale revenues369
 354
Other operating revenues18
 22
Total operating revenues$1,264
 $1,265
Percent change(0.1)% 6.6%
Total retail revenues for 2019 decreased $12 million, or 1.3%, compared to 2018 primarily due to a fuel rate decrease that became effective for the first billing cycle of February 2019. This decrease was largely offset by an increase in rates and pricing, primarily related to PEP and ECO Plan rate changes that became effective for the first billing cycle of September 2018, net of a new tolling arrangement accounted for as a sales-type lease effective January 2019. See Note 2 to the financial statements under "Mississippi PowerEnvironmental Compliance Overview Plan" and " – Performance Evaluation Plan" and Note 9 to the financial statements under "Lessor" for additional information.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales and weather.
Electric rates for Mississippi Power include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of purchased power costs, and do not affect net income. Recoverable fuel costs include fuel and purchased power expenses reduced by the fuel and emissions portion of wholesale revenues from energy sold to customers outside Mississippi Power's service territory. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersMississippi PowerFuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities, including FERC-regulated MRA sales as well as market-based sales, were as follows:
 2019 2018
 (in millions)
Capacity and other$3
 $6
Energy234
 257
Total non-affiliated$237
 $263
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Mississippi Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. In addition, Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers. Short-term opportunity energy sales are also included in sales for resale to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Mississippi Power's variable cost to produce the energy.
Wholesale revenues from sales to non-affiliates decreased $26 million, or 9.9%, compared to 2018. This decrease primarily reflects decreases of $14 million from lower fuel prices, $6 million from decreased customer usage, and $8 million from lower PPA capacity and energy sales.
Wholesale revenues from sales to affiliates will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost.
Wholesale revenues from sales to affiliates increased $41 million, or 45.1%, in 2019 compared to 2018. This increase was primarily due to a $76 million increase associated with higher KWH sales due to the dispatch of Mississippi Power's lower cost generation resources to serve the Southern Company system's territorial load, partially offset by a $35 million decrease associated with lower natural gas prices.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 Weather-Adjusted Percent Change
 (in millions)    
Residential2,062
 (2.4)% (0.8)%
Commercial2,715
 (2.9) (2.7)
Industrial4,795
 (2.6) (2.6)
Other36
 (1.9) (1.9)
Total retail9,608
 (2.7) (2.2)%
Wholesale     
Non-affiliated3,966
 (0.3)  
Affiliated4,758
 84.1
  
Total wholesale8,724
 32.9
  
Total energy sales18,332
 11.5 %  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales decreased 2.7% in 2019 as compared to the prior year, primarily due to decreased demand by several large industrial customers. Weather-adjusted residential and commercial KWH sales decreased 0.8% and 2.7%, respectively, in 2019 primarily due to decreased customer usage as a result of an increase in energy saving initiatives, slightly offset by customer growth.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues to affiliated companies.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Mississippi Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Mississippi Power's generation and purchased power were as follows:
 2019 2018
Total generation (in millions of KWHs)
18,269
 15,966
Total purchased power (in millions of KWHs)
529
 960
Sources of generation (percent) –
   
Gas94
 93
Coal6
 7
Cost of fuel, generated (in cents per net KWH) –
   
Gas2.26
 2.65
Coal4.05
 3.50
Average cost of fuel, generated (in cents per net KWH)
2.37
 2.72
Average cost of purchased power (in cents per net KWH)
3.71
 4.27
Fuel and purchased power expenses were $427 million in 2019, a decrease of $19 million, or 4.3%, as compared to the prior year. The decrease was primarily due to a $60 million decrease related to the average cost of fuel and purchased power primarily due to the lower average cost of natural gas, partially offset by a $41 million net increase associated with the volume of KWHs generated and purchased primarily due to the availability of Mississippi Power's lower-cost generation resources.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through Mississippi Power's fuel cost recovery clauses. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersMississippi PowerFuel Cost Recovery" herein and Note 1 to the financial statements under "Fuel Costs" for additional information.
Fuel
Fuel expense increased $2 million, or 0.5%, in 2019 compared to 2018 primarily due to a 15% increase in the volume of KWHs generated, partially offset by a 13% net decrease in the average cost of fuel per KWH generated.
Purchased Power
Purchased power expense decreased $21 million, or 51.2%, in 2019 compared to 2018. The decrease was primarily the result of a 45% decrease in the volume of KWHs purchased due to the availability of Mississippi Power's lower-cost generation resources and a 13% decrease in the average cost per KWH purchased.
Energy purchases will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $30 million, or 9.6%, in 2019 compared to the prior year. The decrease was primarily due to decreases of $21 million in compensation and benefit expenses primarily due to an employee attrition plan implemented in the third quarter 2018, $5 million in amortization of previously deferred Plant Ratcliffe expenses as a result of a settlement agreement reached with wholesale customers (MRA Settlement Agreement), $5 million in planned generation outage costs, and $4 million in Plant Ratcliffe waste water treatment expenses. These decreases were partially offset by a $9 million increase in overhead line maintenance and vegetation management expenses. See Note 2 to the financial statements under "Mississippi PowerMunicipal and Rural Associations Tariff" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $23 million, or 13.6%, in 2019 compared to 2018 primarily related to increases in amortization associated with ECO Plan regulatory assets. See Note 2 to the financial statements under "Mississippi Power – Environmental Compliance Overview Plan" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Taxes Other Than Income Taxes
Taxes other than income taxes increased $6 million, or 5.6%, in 2019 compared to 2018 primarily due to increases of $4 million in ad valorem taxes and $2 million in franchise taxes.
Estimated Loss on Kemper IGCC
In 2019 and 2018, charges of $24 million and $37 million, respectively, were recorded associated with the abandonment and closure activities and period costs, net of sales proceeds for the mine and gasifier-related assets. The 2019 charge primarily related to the expected close out of a DOE contract related to the Kemper County energy facility. See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized decreased $7 million, or 9.2%, in 2019 compared to 2018, primarily as the result of a decrease in outstanding long-term borrowings. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net decreased $5 million in 2019 compared to 2018. The decrease was primarily due to the $24 million settlement of Mississippi Power's Deepwater Horizon claim in 2018, partially offset by a $9 million increase in interest income associated with a new tolling arrangement accounted for as a sales-type lease and a $7 million decrease in charitable donations. See Notes 3 and 9 to the financial statements under "Other MattersMississippi Power" and "Lessor," respectively, for additional information.
Income Taxes (Benefit)
Income tax expense increased $132 million, or 129.4%, in 2019 compared to 2018 primarily due to a $92 million increase related to the 2018 reduction of a valuation allowance for a state income tax net operating loss (NOL) carryforward, a $42 million increase associated with the revaluation of deferred tax assets related to the Kemper IGCC recorded in 2018 in accordance with the Tax Reform Legislation, and a $9 million increase due to higher pre-tax earnings in 2019. These increases were partially offset by $15 million associated with the flowback of excess deferred income taxes resulting from the MRA Settlement Agreement and a new tolling arrangement accounted for as a sales-type lease. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information.
Southern Power
Net income attributable to Southern Power for 2019 was $339 million, a $152 million increase from 2018, primarily due to net impacts totaling approximately $141 million from the dispositions of the Florida Plants in 2018 and Plant Nacogdoches in the second quarter 2019, which include an asset impairment charge in 2018, a gain on sale in 2019 (including the recognition of deferred ITCs), and a decrease in operations and maintenance expense, partially offset by PPA capacity revenue decreases in 2019. The increase in net income also reflects $79 million in tax expense recognized in 2018 related to the Tax Reform Legislation, a $27 million wind turbine equipment impairment charge in 2018, and net gains in 2019 of $25 million from the Roserock solar facility litigation settlement and sales of wind equipment. These increases were partially offset by $65 million in state income tax benefits recorded in 2018 arising from the reorganization of Southern Power's legal entities and reductions in net income of approximately $60 million related to the SP Wind tax equity partnership entered into in 2018.
See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information on the Florida Plants and Plant Nacogdoches dispositions and sales of wind turbine equipment. See Notes 7 and 10 to the financial statements under "Southern Power" and "Legal Entity Reorganizations" for additional information on the tax equity partnerships and the legal entity reorganization, respectively. Also see Note 3 to the financial statements under "General Litigation – Southern Power" for additional information on the Roserock solar facility litigation settlement.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$1,938
 $(267)
Fuel577
 (122)
Purchased power108
 (68)
Other operations and maintenance359
 (36)
Depreciation and amortization479
 (14)
Taxes other than income taxes40
 (6)
Asset impairment3
 (153)
Gain on disposition(23) (21)
Total operating expenses1,543
 (420)
Operating income395
 153
Interest expense, net of amounts capitalized169
 (14)
Other income (expense), net47
 24
Income taxes (benefit)(56) 108
Net income329
 83
Net income (loss) attributable to noncontrolling interests(10) (69)
Net income attributable to Southern Power$339
 $152
Operating Revenues
Total operating revenues include PPA capacity revenues, which are derived primarily from long-term contracts involving natural gas facilities and a biomass generating facility (through the second quarter 2019 sale of Plant Nacogdoches), and PPA energy revenues from Southern Power's generation facilities. To the extent Southern Power has capacity not contracted under a PPA, it may sell power into an accessible wholesale market, or, to the extent those generation assets are part of the FERC-approved IIC, it may sell power into the Southern Company power pool.
Natural Gas and Biomass Capacity and Energy Revenue
Capacity revenues generally represent the greatest contribution to operating income and are designed to provide recovery of fixed costs plus a return on investment.
Energy is generally sold at variable cost or is indexed to published natural gas indices. Energy revenues will vary depending on the energy demand of Southern Power's customers and their generation capacity, as well as the market prices of wholesale energy compared to the cost of Southern Power's energy. Energy revenues also include fees for support services, fuel storage, and unit start charges. Increases and decreases in energy revenues under PPAs that are driven by fuel or purchased power prices are accompanied by an increase or decrease in fuel and purchased power costs and do not have a significant impact on net income.
Solar and Wind Energy Revenue
Southern Power's energy sales from solar and wind generating facilities are predominantly through long-term PPAs that do not have capacity revenue. Customers either purchase the energy output of a dedicated renewable facility through an energy charge or pay a fixed price related to the energy generated from the respective facility and sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors.
See FUTURE EARNINGS POTENTIAL – "Southern Power's Power Sales Agreements" herein for additional information regarding Southern Power's PPAs.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues Details
Details of Southern Power's operating revenues were as follows:
 2019 2018
 (in millions)
PPA capacity revenues$482
 $580
PPA energy revenues1,081
 1,140
Total PPA revenues1,563
 1,720
Non-PPA revenues363
 472
Other revenues12
 13
Total operating revenues$1,938
 $2,205
Operating revenues for 2019 were $1.9 billion, a $267 million, or 12%, decrease from 2018. The decrease in operating revenues was primarily due to the following:
PPA capacity revenuesdecreased $98 million, or 17%, primarily due to the sales of the Florida Plants in December 2018 and Plant Nacogdoches in June 2019. In addition, the change reflects a reduction of $34 million from the expiration of an affiliate natural gas PPA, offset by a $36 million increase in new PPA capacity revenues from existing natural gas facilities, of which $13 million related to the expansion unit at Plant Mankato.
PPA energy revenues decreased $59 million, or 5%, primarily due to a $67 million decrease in sales from natural gas facilities primarily driven by a $103 million decrease in the average cost of fuel and purchased power, partially offset by a $36 million increase in the volume of KWHs sold due to increased customer load.
Non-PPA revenues decreased $109 million, or 23%, primarily due to a $72 million decrease in the volume of KWHs sold through short-term sales and a $37 million decrease in the market price of energy.
Fuel and Purchased Power Expenses
Details of Southern Power's generation and purchased power were as follows:
 Total
KWHs
Total KWH % ChangeTotal
KWHs
 2019 2018
 (in billions of KWHs)
Generation47 46
Purchased power3 4
Total generation and purchased power50—%50
Total generation and purchased power, excluding solar, wind, and tolling agreements29—%29
Southern Power's PPAs for natural gas generation generally provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel relating to the energy delivered under such PPAs. Consequently, changes in such fuel costs are generally accompanied by a corresponding change in related fuel revenues and do not have a significant impact on net income. Southern Power is responsible for the cost of fuel for generating units that are not covered under PPAs. Power from these generating units is sold into the wholesale market or into the Southern Company power pool for capacity owned directly by Southern Power.
Purchased power expenses will vary depending on demand, availability, and the cost of generating resources throughout the Southern Company system and other contract resources. Load requirements are submitted to the Southern Company power pool on an hourly basis and are fulfilled with the lowest cost alternative, whether that is generation owned by Southern Power, an affiliate company, or external parties. Such purchased power costs are generally recovered through PPA revenues.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Southern Power's fuel and purchased power expenses were as follows:
 2019 2018
 (in millions)
Fuel$577
 $699
Purchased power108
 176
Total fuel and purchased power expenses$685
 $875
In 2019, total fuel and purchased power expenses decreased $190 million, or 22%, compared to 2018. Fuel expensedecreased $122 million, or 17%, due to a $137 million decrease in the average cost of fuel per KWH generated, partially offset by a $15 million increase associated with the volume of KWHs generated. Purchased power expense decreased $68 million, or 39%, due to a $37 million decrease associated with the average cost of purchased power and a $31 million decrease associated with the volume of KWHs purchased.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses decreased $36 million, or 9%, compared to 2018. The decrease was due to gains totaling $17 million on the sale of wind turbine equipment, decreased expense of $17 million related to the dispositions of the Florida Plants and Plant Nacogdoches, and the recovery of $5 million in legal costs related to the Roserock solar facility litigation settlement in the first quarter 2019. See Note 15 to the financial statements under "Southern PowerDevelopment Projects" and " – Sales of Natural Gas and Biomass Plants" for additional information on the sale of wind turbine equipment and the dispositions, respectively. Also see Note 3 to the financial statements under "General Litigation Matters – Southern Power" for additional information on the litigation settlement.
Asset Impairment
Asset impairment charges totaling $156 million were recorded in 2018, including $119 million related to the sale of the Florida Plants and $36 million related to wind turbine equipment held for development projects. Asset impairment charges in 2019 were immaterial. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information.
Gain on Dispositions, Net
The sale of Plant Nacogdoches in 2019 resulted in a $23 million gain. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2019, interest expense, net of amounts capitalized decreased $14 million, or 8%, compared to 2018, primarily due to a decrease in the amount of outstanding debt.
Other Income (Expense), Net
In 2019, other income (expense), net increased $24 million, or 104%, compared to 2018 primarily due to a $36 million gain arising from the Roserock solar facility litigation settlement in 2019, partially offset by a $14 million gain from a joint-development wind project in 2018 attributable to Southern Power's partner in the project, which was offset by a $14 million loss within noncontrolling interests. See Note 3 to the financial statements under "Southern Power" for additional information regarding the litigation settlement.
Income Taxes (Benefit)
In 2019, income tax benefit was $56 million compared to $164 million for 2018, a decrease of $108 million, primarily attributable to reductions in tax benefits of $127 million from wind PTCs primarily following the 2018 sale of a noncontrolling tax equity interest in SP Wind and $65 million from changes in state apportionment rates following the 2018 reorganizations of certain legal entities, as well as a $64 million increase in income tax expense as a result of higher pre-tax earnings, partially offset by $79 million in tax expense recognized in 2018 related to the Tax Reform Legislation and a $75 million tax benefit resulting from the recognition of deferred ITCs remaining from the original construction recognized in connection with the sale of Plant Nacogdoches.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

See FUTURE EARNINGS POTENTIAL – "Income Tax MattersFederal Tax Reform Legislation" herein and Notes 1, 10, and 15 to the financial statements under "Income Taxes," "Effective Tax Rate," and "Southern Power," respectively, for additional information.
Net Income Attributable to Noncontrolling Interests
In 2019, net income attributable to noncontrolling interests decreased $69 million, or 117%, compared to 2018. The decrease was primarily due to $92 million of losses attributable to noncontrolling interests related to the tax equity partnerships entered into in 2018 and $14 million attributable to a joint-development wind project in 2018, partially offset by an allocation of approximately $29 million of income to the noncontrolling interest partner related to the Roserock solar facility litigation settlement. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and Note 7 to the financial statements under "Southern Power" for additional information regarding the litigation settlement and tax equity partnerships, respectively.
Southern Company Gas
Operating Metrics
Southern Company Gas continues to focus on several operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
Southern Company Gas measures weather and the effect on its business using Heating Degree Days. Generally, increased Heating Degree Days result in higher demand for natural gas on Southern Company Gas' distribution system. Southern Company Gas has various regulatory mechanisms, such as weather and revenue normalization and straight-fixed-variable rate design, which limit its exposure to weather changes within typical ranges in each of its utility's respective service territory, including Nicor Gas following the approval of a revenue decoupling mechanism for residential customers in its recent rate case. Southern Company Gas also utilizes weather hedges to limit the negative income impacts in the event of warmer-than-normal weather.
The number of customers served by gas distribution operations and gas marketing services can be impacted by natural gas prices, economic conditions, and competition from alternative fuels. Gas distribution operations and gas marketing services' customers are primarily located in Georgia and Illinois.
Southern Company Gas' natural gas volume metrics for gas distribution operations and gas marketing services illustrate the effects of weather and customer demand for natural gas. Wholesale gas services' physical sales volumes represent the daily average natural gas volumes sold to its customers.
Seasonality of Results
During the Heating Season, natural gas usage and operating revenues are generally higher as more customers are connected to the gas distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, wholesale gas services' operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively evenly throughout the year. Seasonality also affects the comparison of certain balance sheet items across quarters, including receivables, unbilled revenues, natural gas for sale, and notes payable. However, these items are comparable when reviewing Southern Company Gas' annual results. Thus, Southern Company Gas' operating results can vary significantly from quarter to quarter as a result of seasonality, which is illustrated in the table below.
  
Percent Generated During
Heating Season
  Operating Revenues 
Net
Income
2019 68.7% 86.8%
2018 68.7% 96.0%
Net Income
Net income attributable to Southern Company Gas in 2019 was $585 million, an increase of $213 million, or 57.3%, compared to the prior year. The change in net income includes a $125 million increase at wholesale gas services, an increase of $57 million in continued investment in infrastructure replacement programs and base rate changes at gas distribution operations, net of depreciation, a $34 million decrease in income taxes primarily at Atlanta Gas Light due to increased flowback of excess deferred income taxes in lieu of a rate increase as previously authorized by the Georgia PSC, and an $11 million increase in earnings from equity method investments in 2019. This increase also includes a $51 million net loss in 2018 from the Southern Company Gas
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Dispositions (including the goodwill impairment charge) and $21 million in disposition-related costs in 2018, partially offset by $86 million in after-tax impairment charges in 2019. See Notes 3 and 15 to the financial statements under "Other MattersSouthern Company Gas" and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on the impairment charges. See Note 2 to the financial statements under "Southern Company Gas – Rate Proceedings – Nicor Gas" and " – Atlanta Gas Light" for additional information on the impacts of the Tax Reform Legislation. Also see FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
A condensed income statement for Southern Company Gas follows:
 2019 Increase (Decrease) from 2018
 (in millions)
Operating revenues$3,792
 $(117)
Cost of natural gas1,319
 (220)
Cost of other sales
 (12)
Other operations and maintenance888
 (93)
Depreciation and amortization487
 (13)
Taxes other than income taxes213
 2
Impairment charges115
 73
(Gain) loss on dispositions, net
 291
Total operating expenses3,022
 28
Operating income770
 (145)
Earnings from equity method investments157
 9
Interest expense, net of amounts capitalized232
 4
Other income (expense), net20
 19
Earnings before income taxes715
 (121)
Income taxes130
 (334)
Net Income$585
 $213
The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for 2019 compared to 2018. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Southern Company Gas Dispositions.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues in 2019 were $3.8 billion, a $117 million decrease, compared to 2018. Details of operating revenues were as follows:
 2019
 (in millions)
Operating revenues – prior year$3,909
Estimated change resulting from –
Infrastructure replacement programs and base rate changes96
Gas costs and other cost recovery(89)
Wholesale gas services150
Southern Company Gas Dispositions(*)
(300)
Other26
Operating revenues – current year$3,792
Percent change(3.0)%
(*)
Includes a $245 million decrease related to natural gas revenues, including alternative revenue programs, and a $55 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company.Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2019 compared to the prior year primarily due to increases of $74 million at Nicor Gas and $16 million at Atlanta Gas Light. These amounts include gas distribution operations' continued investments recovered through infrastructure replacement programs and base rate increases as well as customer refunds in 2018 as a result of the Tax Reform Legislation. See Note 2 to the financial statements under "Southern Company Gas" for additional information.
Revenues associated with gas costs and other cost recovery decreased in 2019 compared to the prior year primarily due to lower natural gas prices and decreased volumes of natural gas sold. Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. See "Cost of Natural Gas" herein for additional information.
Revenues from wholesale gas services increased in 2019 primarily due to derivative gains, partially offset by decreased commercial activity. See "Segment InformationWholesale Gas Services" herein for additional information.
Other revenues increased in 2019 primarily due to increases in customers at gas distribution operations and recovery of prior period hedge losses at gas marketing services.
Heating Degree Days
During Heating Season, natural gas usage and operating revenues are generally higher. Weather typically does not have a significant net income impact other than during the Heating Season. The following table presents the Heating Degree Days information for Illinois and Georgia, the primary locations where Southern Company Gas' operations are impacted by weather.
  Years Ended December 31, 2019 vs. normal 2019 vs. 2018
  
Normal(a)
 2019 2018 colder (warmer) colder (warmer)
  (in thousands)    
Illinois(b)
 5,782
 6,136
 6,101
 6.1 % 0.6 %
Georgia 2,529
 2,157
 2,588
 (14.7)% (16.7)%
(a)Normal represents the 10-year average from January 1, 2009 through December 31, 2018 for Illinois at Chicago Midway International Airport and for Georgia at Atlanta Hartsfield-Jackson International Airport, based on information obtained from the National Oceanic and Atmospheric Administration, National Climatic Data Center.
(b)Heating Degree Days in Illinois are expected to have a limited financial impact in future years. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas hedged its exposure to warmer-than-normal weather in Illinois for gas distribution operations and in Illinois and Georgia for gas marketing services. The remaining impacts of weather on earnings were immaterial.
Customer Count
The following table provides the number of customers served by Southern Company Gas at December 31, 2019 and 2018:
  2019 2018
  (in thousands, except market share %)
Gas distribution operations 4,277
 4,248
Gas marketing services    
Energy customers(*)
 631
 697
Market share of energy customers in Georgia 28.9% 29.0%
(*)Gas marketing services' customers are primarily located in Georgia and Illinois. Also included as of December 31, 2018 were approximately 70,000 customers in Ohio contracted through an annual auction process to serve for 12 months beginning April 1, 2018.
Southern Company Gas anticipates overall customer growth trends in gas distribution operations to continue as it expects continued improvement in the new housing market and low natural gas prices. Southern Company Gas uses a variety of targeted marketing programs to attract new customers and to retain existing customers.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, gas distribution operations charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Gas distribution operations defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. Cost of natural gas at gas distribution operations represented 84.5% of the total cost of natural gas for 2019.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
In 2019, cost of natural gas was $1.3 billion, a decrease of $220 million, or 14.3%, compared to the prior year. Excluding a $106 million decrease related to the Southern Company Gas Dispositions, cost of natural gas decreased by $114 million, which reflects a 14.8% decrease in natural gas prices compared to 2018.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Volumes of Natural Gas Sold
The following table details the volumes of natural gas sold during all periods presented.
   2019 vs. 2018
 2019 2018 % Change
Gas distribution operations (mmBtu in millions)     
Firm677
 721
 (6.1)%
Interruptible92
 95
 (3.2)%
Total(*)769
 816
 (5.8)%
Wholesale gas services (mmBtu in millions/day)     
Daily physical sales6.4
 6.7
 (4.5)%
Gas marketing services (mmBtu in millions)     
Firm:     
Georgia33
 37
 (10.8)%
Illinois12
 13
 (7.7)%
Other15
 20
 (25.0)%
Interruptible large commercial and industrial14
 14
  %
Total74
 84
 (11.9)%
(*)Includes total volumes of natural gas sold of 38 mmBtu for 2018 related to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold in July 2018. See Note 15 to the financial statements under "Southern Company Gas – Sale of Elizabethtown Gas and Elkton Gas" and " – Sale of Florida City Gas" for additional information.
Cost of Other Sales
Cost of other sales related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses decreased $93 million, or 9.5%, compared to the prior year. Excluding a $65 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses decreased $28 million. This decrease was primarily due to $28 million of disposition-related costs incurred during 2018, a $12 million adjustment in 2018 for the adoption of a new paid time off policy, an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions in 2018, and a $7 million decrease in compensation and benefits costs, partially offset by a $22 million increase in rider expenses, primarily at Nicor Gas, passed through directly to customers. See FUTURE EARNINGS POTENTIAL – "Southern Company GasUtility Regulation and Rate Design" herein for additional information.
Depreciation and Amortization
In 2019, depreciation and amortization decreased $13 million, or 2.6%, compared to the prior year. Excluding a $27 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $14 million. This increase was primarily due to continued infrastructure investments at gas distribution operations, partially offset by accelerated depreciation related to assets retired in 2018. See Note 2 to the financial statements under "Southern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information.
Impairment Charges
In 2019, Southern Company Gas recorded impairment charges of $91 million related to a natural gas storage facility in Louisiana and $24 million in contemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. In 2018, a goodwill impairment charge of $42 million was recorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1, 3, and 15 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities," "Other MattersSouthern Company Gas," and "Southern Company Gas," respectively, for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(Gain) Loss on Dispositions, Net
In 2018, gain on dispositions, net was $291 million and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
In 2019, earnings from equity method investments increased $9 million, or 6.1%, compared to the prior year and reflect higher earnings from SNG as a result of rate increases that became effective September 2018, partially offset by a $6 million pre-tax loss on the sale of Triton in May 2019. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Other Income (Expense), Net
In 2019, other income (expense), net increased $19 million compared to the prior year. This increase primarily resulted from a $23 million decrease in charitable donations in 2019.
Income Taxes
In 2019, income taxes decreased $334 million, or 72.0%, compared to the prior year. This decrease primarily reflects a reduction of $348 million related to the Southern Company Gas Dispositions, as well as $29 million in benefits associated with impairment charges in 2019 and additional benefits from the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light as previously authorized by the Georgia PSC, partially offset by $48 million of additional taxes associated with increased pre-tax earnings at wholesale gas services.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information. Also see Notes 2, 3, and 15 to the financial statements under "Southern Company Gas," "Other MattersSouthern Company Gas," and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on Atlanta Gas Light's regulatory treatment of the impacts of the Tax Reform Legislation and the impairment charges.
Performance and Non-GAAP Measures
Adjusted operating margin is a non-GAAP measure that is calculated as operating revenues less cost of natural gas, cost of other sales, and revenue tax expense. Adjusted operating margin excludes other operations and maintenance expenses, depreciation and amortization, taxes other than income taxes, impairment charges, and gain (loss) on dispositions, net, which are included in the calculation of operating income as calculated in accordance with GAAP and reflected in the statements of income. The presentation of adjusted operating margin is believed to provide useful information regarding the contribution resulting from base rate changes, infrastructure replacement programs and capital projects, and customer growth at gas distribution operations since the cost of natural gas and revenue tax expense can vary significantly and are generally billed directly to customers. Southern Company Gas further believes that utilizing adjusted operating margin at gas pipeline investments, wholesale gas services, and gas marketing services allows it to focus on a direct measure of performance before overhead costs. The applicable reconciliation of operating income to adjusted operating margin is provided herein.
Adjusted operating margin should not be considered an alternative to, or a more meaningful indicator of, Southern Company Gas' operating performance than operating income as determined in accordance with GAAP. In addition, Southern Company Gas' adjusted operating margin may not be comparable to similarly titled measures of other companies.
Detailed variance explanations of Southern Company Gas' financial performance are provided herein.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Reconciliations of operating income to adjusted operating margin are as follows:
 2019 2018
 (in millions)
Operating Income$770
 $915
Other operating expenses(a)
1,703
 1,443
Revenue taxes(b)
(114) (111)
Adjusted Operating Margin$2,359
 $2,247
(a)Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, impairment charges, and gain (loss) on dispositions, net.
(b)Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Segment Information
   2019 2018
  
 Adjusted Operating Margin(a)
 
Operating Expenses(a)
 Net Income (Loss) 
 Adjusted Operating Margin(a)
 
Operating Expenses (a)(b)
 
Net Income (Loss)(b)
  (in millions) (in millions)
Gas distribution operations $1,799
 $1,226
 $337
 $1,794
 $890
 $334
Gas pipeline investments 32
 12
 94
 32
 12
 103
Wholesale gas services 273
 54
 163
 134
 64
 38
Gas marketing services 234
 122
 83
 263
 244
 (40)
All other 28
 182
 (92) 33
 131
 (63)
Intercompany eliminations (7) (7) 
 (9) (9) 
Consolidated $2,359
 $1,589
 $585
 $2,247
 $1,332
 $372
(a)Adjusted operating margin and operating expenses are adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
(b)
SegmentOperating expenses for gas distribution operations and gas marketing services include the gain on dispositions, net. Net income for gas distribution operations and gas marketing services includes the gain on dispositions, net and the associated income (loss) for the traditional electric operating companies includes pre-tax charges for estimated probable losses on the Kemper IGCC of $428 million ($264 million after tax) in 2016, $365 million ($226 million after tax) in 2015, and $868 million ($536 million after tax) in 2014.tax expense. See Note 315 to the financial statements under "Integrated Coal Gasification Combined CycleKemper IGCC Schedule and Cost EstimateSouthern Company Gas" for additional information.
Gas Distribution Operations
Gas distribution operations is the largest component of Southern Company Gas' business and is subject to regulation and oversight by agencies in each of the states it serves. These agencies approve natural gas rates designed to provide Southern Company Gas with the opportunity to generate revenues to recover the cost of natural gas delivered to its customers and its fixed and variable costs, including depreciation, interest expense, operations and maintenance, taxes, and overhead costs, and to earn a reasonable return on its investments.
With the exception of Atlanta Gas Light, Southern Company Gas' second largest utility that operates in a deregulated natural gas market and has a straight-fixed-variable rate design that minimizes the variability of its revenues based on consumption, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are a function of weather conditions, price levels for natural gas, and general economic conditions that may impact customers' ability to pay for natural gas consumed. Southern Company Gas has various weather mechanisms, such as weather normalization mechanisms and weather derivative instruments, that limit its exposure to weather changes within typical ranges in its natural gas distribution utilities' service territories.
In July 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Also in July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table details the results of gas distribution operations including and excluding the impact of the utilities sold in 2018.
Favorable(unfavorable) 2019 vs 2018 Impacts of Utilities Sold in 2018 Variance Excluding Utilities Sold in 2018
  (in millions)
Adjusted Operating Margin $5
 $138
 $143
Operating expenses (336) 246
 (90)
Other income (expense), net (3) 
 (3)
Interest expenses (9) (13) (22)
Income tax expense 346
 (315) 31
Net income $3
 $56
 $59
Excluding the impact of the utilities sold in 2018, net income in 2019 increased $59 million, or 21.2%, compared to the prior year. The $143 million increase in adjusted operating margin reflects additional revenue from base rate increases and continued investment recovered through infrastructure replacement programs, a decrease in refunds associated with bad debt riders, and the customer refunds in 2018 as a result of the Tax Reform Legislation. The $90 million increase in operating expenses includes increases in compensation and benefit costs and rider expenses passed through directly to customers, as well as additional depreciation primarily due to additional assets placed in service. The $3 million decrease in other income (expense), net is primarily due to a contractor litigation settlement in 2018. The $22 million increase in interest expense is primarily from the issuance of first mortgage bonds at Nicor Gas. The $31 million decrease in income tax expense is primarily due to an increase in the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light.
See Note 2 to the financial statements under "Southern Company GasRate ProceedingsAtlanta Gas Light" and " – Infrastructure Replacement Programs and Capital ProjectsAtlanta Gas LightPRP" herein for additional information on Atlanta Gas Light's stipulation reflecting the impacts of the Tax Reform Legislation and the contractor litigation settlement, respectively.
Gas Pipeline Investments
Gas pipeline investments consists primarily of joint ventures in natural gas pipeline investments including SNG, Atlantic Coast Pipeline, PennEast Pipeline, and Dalton Pipeline. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Net income in 2019 decreased $9 million, or 8.7%, compared to the prior year. This decrease primarily relates to an increase in tax expense due to changes in state apportionment rates, partially offset by higher earnings from SNG.
Wholesale Gas Services
Wholesale gas services is involved in asset management and optimization, storage, transportation, producer and peaking services, natural gas supply, natural gas services, and wholesale gas marketing. Southern Company Gas has positioned the business to generate positive economic earnings on an annual basis even under low volatility market conditions that can result from a number of factors. When market price volatility increases, wholesale gas services is well positioned to capture significant value and generate stronger results. Operating expenses primarily reflect employee compensation and benefits.
Net income in 2019 increased $125 million, or 328.9%, compared to the prior year. This increase primarily relates to a $139 million increase in adjusted operating margin, a $10 million decrease in operating expenses, and a $20 million increase in other income (expense), partially offset by a $48 million increase in income taxes.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of adjusted operating margin are provided in the table below.
 2019 2018
 (in millions)
Commercial activity recognized$54
 $254
Gain on storage derivatives40
 9
Gain (loss) on transportation and forward commodity derivatives186
 (119)
LOCOM adjustments, net of current period recoveries(16) (7)
Purchase accounting adjustments to fair value inventory and contracts9
 (3)
Adjusted operating margin$273
 $134
Change in Commercial Activity
The commercial activity at wholesale gas services includes recognition of storage and transportation values that were generated in prior periods, which reflect the impact of prior period hedge gains and losses as associated physical transactions occur. The decrease in commercial activity in 2019 compared to the prior year was primarily due to significant natural gas price volatility that resulted from prolonged cold weather during 2018 coupled with low natural gas supply.
Change in Storage and Transportation Derivatives
Volatility in the natural gas market arises from a number of factors, such as weather fluctuations or changes in supply or demand for natural gas in different regions of the U.S. The volatility of natural gas commodity prices has a significant impact on Southern Company Gas' customer rates, long-term competitive position against other energy sources, and the ability of wholesale gas services to capture value from locational and seasonal spreads. Forward storage or time spreads applicable to the locations of wholesale gas services' specific storage positions in 2019 resulted in storage derivative gains. Transportation and forward commodity derivative gains in 2019 are primarily the result of narrowing transportation spreads due to supply constraints and increases in natural gas supply, which impacted forward prices at natural gas receipt and delivery points, primarily in the Northeast and Midwest regions.
The natural gas that wholesale gas services purchases and injects into storage is accounted for at the LOCOM value utilizing gas daily or spot prices at the end of the year. See Note 1 to the financial statements under "Natural Gas for Sale" for additional information.
Withdrawal Schedule and Physical Transportation Transactions
The expected natural gas withdrawals from storage and expected offset to prior hedge losses/gains associated with the transportation portfolio of wholesale gas services are presented in the following table, along with the net operating revenues expected at the time of withdrawal from storage and the physical flow of natural gas between contracted transportation receipt and delivery points. Wholesale gas services' expected net operating revenues exclude storage and transportation demand charges, as well as other variable fuel, withdrawal, receipt, and delivery charges, and exclude estimated profit sharing under asset management agreements. Further, the amounts that are realizable in future periods are based on the inventory withdrawal schedule, planned physical flow of natural gas between the transportation receipt and delivery points, and forward natural gas prices at December 31, 2019. A portion of wholesale gas services' storage inventory and transportation capacity is economically hedged with futures contracts, which results in the realization of substantially fixed net operating revenues.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Storage Withdrawal  
 
Total storage(a)
 
Expected net operating losses(b)
 
Physical Transportation Transactions – Expected Net Operating Gains(c)
 (in mmBtu in millions) (in millions) (in millions)
202061
 $6
 $(119)
2021 and thereafter
 
 (67)
Total at December 31, 201961
 $6
 $(186)
(a)At December 31, 2019, the WACOG of wholesale gas services' expected natural gas withdrawals from storage was $1.87 per mmBtu.
(b)Represents expected operating losses from planned storage withdrawals associated with existing inventory positions and could change as wholesale gas services adjusts its daily injection and withdrawal plans in response to changes in future market conditions and forward NYMEX price fluctuations.
(c)
Net of $202 million of unamortized debt issuance costs as of December 31, 2014.AlsoRepresents the expected net of $488 million of deferred tax assets as of December 31, 2014.
gains during the periods in which the derivatives will be settled and the physical transportation transactions will occur that offset the derivative gains and losses previously recognized.
Gas Marketing Services
Gas marketing services provides energy-related products and services to natural gas markets and participants in customer choice programs that were approved in various states to increase competition. These programs allow customers to choose their natural gas supplier while the local distribution utility continues to provide distribution and transportation services. Gas marketing services is weather sensitive and uses a variety of hedging strategies, such as weather derivative instruments and other risk management tools, to partially mitigate potential weather impacts.
On June 4, 2018, Southern Company Gas completed the sale of Pivotal Home Solutions to American Water Enterprises LLC. See Note 15 under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Net income increased $123 million in 2019 compared to the prior year. This increase primarily relates to a $122 million decrease in operating expenses and a $27 million decrease in income tax expense, partially offset by a $29 million decrease in adjusted operating margin.
Excluding a $43 million decrease attributable to the 2018 disposition of Pivotal Home Solutions, adjusted operating margin increased $14 million, which primarily reflects favorable margins and recovery of prior period hedge losses. Excluding a $116 million decrease attributable to the 2018 disposition of Pivotal Home Solutions that includes the related goodwill impairment charge, operating expense decreased $6 million due to lower amortization of intangible assets. Excluding a $33 million decrease attributable to the 2018 disposition of Pivotal Home Solutions, income tax expense increased $6 million primarily due to higher pre-tax earnings.
All Other
All other includes Southern Company Gas' storage and fuels operations and its investment in Triton through completion of its sale on May 29, 2019, AGL Services Company, and Southern Company Gas Capital, as well as various corporate operating expenses that are not allocated to the reportable segments and interest income (expense) associated with affiliate financing arrangements.
Net loss increased $29 million, or 46.0%, in 2019 compared to the prior year. This increase primarily reflects a $51 million increase in operating expenses, partially offset by a $39 million decrease in income taxes. The increase in operating expenses primarily reflects a $91 million impairment charge related to a natural gas storage facility in Louisiana and a $24 million impairment charge in contemplation of the sale of Southern Company Gas' interests in Pivotal LNG and Atlantic Coast Pipeline, partially offset by a $12 million one-time adjustment in the first quarter 2018 for the adoption of a new paid time off policy, $28 million of disposition-related costs incurred during 2018, and a $14 million decrease in depreciation and amortization. The decrease in income taxes reflects a $29 million benefit due to the impairment charge, a $13 million benefit related to the reversal of a federal income tax valuation allowance in connection with the sale of Triton, the impact of deferred tax expenses related to the enactment of the State of Illinois income tax legislation in 2018, and changes in state income tax apportionment factors in several states during 2019. See Note 3 to the financial statements under "Other MattersSouthern Company Gas," Note 10 to the financial statements, and Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Segment Reconciliations
Reconciliations of operating income to adjusted operating margin for 2019 and 2018 are provided in the following tables. See Note 16 to the financial statements under "Southern Company Gas" for additional segment information.
Table of ContentsIndex to Financial Statements


NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report

Products and Services
Electric Utilities' Revenues
YearRetail Wholesale Other Total
 (in millions)
2016$15,234
 $1,926
 $781
 $17,941
201514,987
 1,798
 657
 17,442
201415,550
 2,184
 672
 18,406
 2019
 Gas Distribution OperationsGas Pipeline InvestmentsWholesale Gas ServicesGas Marketing ServicesAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$573
$20
$219
$112
$(154)$
$770
Other operating expenses(a)
1,340
12
54
122
182
(7)1,703
Revenue tax expense(b)
(114)




(114)
Adjusted Operating Margin$1,799
$32
$273
$234
$28
$(7)$2,359
Southern Company Gas' Revenues
YearGas
Distribution
Operations
 Gas
Marketing
Services
 All Other Total
 (in millions)
2016$1,266
 $354
 $32
 $1,652
 2018
 Gas Distribution OperationsGas Pipeline InvestmentsWholesale Gas ServicesGas Marketing ServicesAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$904
$20
$70
$19
$(98)$
$915
Other operating expenses(a)
1,001
12
64
244
131
(9)1,443
Revenue tax expense(b)
(111)




(111)
Adjusted Operating Margin$1,794
$32
$134
$263
$33
$(9)$2,247
(a)Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, impairment charges, and (gain) loss on dispositions, net.
(b)Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Effects of Inflation
The traditional electric operating companies and the natural gas distribution utilities are subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Southern Power is party to long-term contracts reflecting market-based rates, including inflation expectations. Any adverse effect of inflation on the Registrants' results of operations has not been substantial in recent years. See Note 2 to the financial statements for additional information on rate regulation.
FUTURE EARNINGS POTENTIAL
General
Prices for electric service provided by the traditional electric operating companies and natural gas distributed by the natural gas distribution utilities to retail customers are set by state PSCs or other applicable state regulatory agencies under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. Southern Power continues to focus on long-term PPAs. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and EstimatesUtility Regulation" herein and Note 2 to the financial statements for additional information about regulatory matters.
Each Registrant's results of operations are not necessarily indicative of its future earnings potential. Recent disposition activities described under "Acquisitions and Dispositions" herein and in Note 15 to the financial statements will impact future earnings for the applicable Registrants. The level of the Registrants' future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Registrants' primary businesses of selling electricity and/or distributing natural gas, as described further herein.
For the traditional electric operating companies, these factors include the ability to maintain constructive regulatory environments that allow for the timely recovery of prudently-incurred costs during a time of increasing costs, continued customer growth, and the trend of reduced electricity usage per customer, especially in residential and commercial markets. Other major factors include Plant Vogtle Units 3 and 4 construction and rate recovery related thereto for Georgia Power and the ability to prevail against legal challenges associated with the Kemper County energy facility for Mississippi Power.
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report


14. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Summarized quarterly financial information for 2016Earnings in the electricity business will also depend upon maintaining and 2015 is as follows:
     Consolidated Net Income Attributable to Southern Company Per Common Share
 
Operating
Revenues
 
Operating
Income
  
Basic
Earnings
 Diluted Earnings   
Trading
Price Range
Quarter Ended Dividends High Low
 (in millions)          
March 2016$3,992
 $940
 $489
 $0.53
 $0.53
 $0.5425
 $51.73
 $46.00
June 20164,459
 1,185
 623
 0.67
 0.66
 0.5600
 53.64
 47.62
September 20166,264
 1,917
 1,139
 1.18
 1.17
 0.5600
 54.64
 50.00
December 20165,181
 587
 197
 0.20
 0.20
 0.5600
 52.23
 46.20
                
March 2015$4,183
 $957
 $508
 $0.56
 $0.56
 $0.5250
 $53.16
 $43.55
June 20154,337
 1,098
 629
 0.69
 0.69
 0.5425
 45.44
 41.40
September 20155,401
 1,649
 959
 1.05
 1.05
 0.5425
 46.84
 41.81
December 20153,568
 578
 271
 0.30
 0.30
 0.5425
 47.50
 43.38
In accordance withgrowing sales, considering, among other things, the adoption and/or penetration rates of ASU 2016-09 (see Note 1 under "Recently Issued Accounting Standards"), previously reported amountsincreasingly energy-efficient technologies, increasing volumes of electronic commerce transactions, and, for income tax expense were reduced by $9 millionGeorgia Power, more multi-family home construction, all of which could contribute to a net reduction in customer usage.
The level of future earnings for Southern Power's competitive wholesale electric business depends on numerous factors including Southern Power's ability to execute its growth strategy through the development or acquisition of renewable facilities and other energy projects while containing costs, as well as regulatory matters, creditworthiness of customers, total electric generating capacity available in Southern Power's market areas, and Southern Power's ability to successfully remarket capacity as current contracts expire. In addition, renewable portfolio standards, transmission constraints, cost of generation from units within the Southern Company power pool, and operational limitations could influence Southern Power's future earnings.
The level of future earnings for Southern Company Gas' primary business of distributing natural gas and its complementary businesses in the third quarter 2016, $11 milliongas pipeline investments, wholesale gas services, and gas marketing services sectors depends on numerous factors. These factors include the natural gas distribution utilities' ability to maintain constructive regulatory environments that allow for the timely recovery of prudently-incurred costs, the completion and subsequent operation of ongoing infrastructure and other construction projects, creditworthiness of customers, and Southern Company Gas' ability to optimize its transportation and storage positions and to re-contract storage rates at favorable prices. The volatility of natural gas prices has an impact on Southern Company Gas' customer rates, its long-term competitive position against other energy sources, and the ability of Southern Company Gas' gas marketing services and wholesale gas services businesses to capture value from locational and seasonal spreads. Additionally, changes in commodity prices subject a portion of Southern Company Gas' operations to earnings variability. Over the longer term, volatility is expected to be low to moderate and locational and/or transportation spreads are expected to decrease as new pipelines are built to reduce the existing supply constraints in the second quarter 2016,shale areas of the Northeast U.S. To the extent these pipelines are further delayed or not built, volatility could increase. See "Construction Programs" herein for additional information on permitting challenges experienced by the Atlantic Coast Pipeline and $5 millionthe PennEast Pipeline. Additional economic factors may contribute to this environment, including a significant drop in oil and natural gas prices, which could lead to consolidation of natural gas producers or reduced levels of natural gas production. Further, if economic conditions continue to improve, the demand for natural gas may increase, which may cause natural gas prices to rise and drive higher volatility in the first quarter 2016.natural gas markets on a longer-term basis.
Earnings for both the electricity and natural gas businesses are subject to a variety of other factors. These factors include weather, competition, developing new and maintaining existing energy contracts and associated load requirements with wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the prices of electricity and natural gas, and the price elasticity of demand. Demand for electricity and natural gas in the Registrants' service territories is primarily driven by the pace of economic growth or decline that may be affected by changes in regional and global economic conditions, which may impact future earnings.
Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
As part of its ongoing effort to adapt to changing market conditions, Southern Company continues to evaluate and consider a wide array of potential business strategies. These strategies may include business combinations, partnerships, and acquisitions involving other utility or non-utility businesses or properties, disposition of certain assets or businesses, internal restructuring, or some combination thereof. Furthermore, Southern Company may engage in new business ventures that arise from competitive and regulatory changes in the utility industry. Pursuit of any of the above strategies, or any combination thereof, may significantly affect the business operations, risks, and financial condition of Southern Company. In addition, basicSouthern Power and diluted EPS increased from previously reported amountsSouthern Company Gas regularly consider and evaluate joint development arrangements as well as acquisitions and dispositions of $1.17businesses and $1.16 in the third quarter 2016, respectively, $0.65assets as part of their business strategies. See "Acquisitions and $0.65 in the second quarter 2016, respectively,Dispositions" herein and $0.53 and $0.53 in the first quarter 2016, respectively.
As a result of the revisionsNote 15 to the cost estimate for the Kemper IGCC, Southern Company recorded total pre-tax charges to income for the estimated probable losses on the Kemper IGCC of $206 million ($127 million after tax) in the fourth quarter 2016, $88 million ($54 million after tax) in the third quarter 2016, $81 million ($50 million after tax) in the second quarter 2016, $53 million ($33 million after tax) in the first quarter 2016, $183 million ($113 million after tax) in the fourth quarter 2015, $150 million ($93 million after tax) in the third quarter 2015, $23 million ($14 million after tax) in the second quarter 2015, and $9 million ($6 million after tax) in the first quarter 2015. See Note 3 under "Integrated Coal Gasification Combined Cycle"financial statements for additional information.
The Southern Company system's business is influenced by seasonal weather conditions.
Table of ContentsIndex to Financial Statements


SELECTED CONSOLIDATED FINANCIALCOMBINED MANAGEMENT'S DISCUSSION AND OPERATING DATA
For the Periods Ended December 2012 through 2016ANALYSIS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report
 
2016(a)

 2015
 2014
 2013
 2012
Operating Revenues (in millions)$19,896
 $17,489
 $18,467
 $17,087
 $16,537
Total Assets (in millions)(b)(c)
$109,697
 $78,318
 $70,233
 $64,264
 $62,814
Gross Property Additions (in millions)$7,624
 $6,169
 $6,522
 $5,868
 $5,059
Return on Average Common Equity (percent)10.80
 11.68
 10.08
 8.82
 13.10
Cash Dividends Paid Per Share of
 Common Stock
$2.2225
 $2.1525
 $2.0825
 $2.0125
 $1.9425
Consolidated Net Income Attributable to
   Southern Company (in millions)
$2,448
 $2,367
 $1,963
 $1,644
 $2,350
Earnings Per Share —         
Basic$2.57
 $2.60
 $2.19
 $1.88
 $2.70
Diluted2.55
 2.59
 2.18
 1.87
 2.67
Capitalization (in millions):         
Common stock equity$24,758
 $20,592
 $19,949
 $19,008
 $18,297
Preferred and preference stock of subsidiaries and
   noncontrolling interests
1,854
 1,390
 977
 756
 707
Redeemable preferred stock of subsidiaries118
 118
 375
 375
 375
Redeemable noncontrolling interests164
 43
 39
 
 
Long-term debt(b)
42,629
 24,688
 20,644
 21,205
 19,143
Total (excluding amounts due within one year)$69,523
 $46,831
 $41,984
 $41,344
 $38,522
Capitalization Ratios (percent):         
Common stock equity35.6
 44.0
 47.5
 46.0
 47.5
Preferred and preference stock of subsidiaries and
   noncontrolling interests
2.7
 3.0
 2.3
 1.8
 1.8
Redeemable preferred stock of subsidiaries0.2
 0.3
 0.9
 0.9
 1.0
Redeemable noncontrolling interests0.2
 0.1
 0.1
 
 
Long-term debt(b)
61.3
 52.6
 49.2
 51.3
 49.7
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Other Common Stock Data:         
Book value per share$25.00
 $22.59
 $21.98
 $21.43
 $21.09
Market price per share:         
High$54.64
 $53.16
 $51.28
 $48.74
 $48.59
Low46.00
 41.40
 40.27
 40.03
 41.75
Close (year-end)49.19
 46.79
 49.11
 41.11
 42.81
Market-to-book ratio (year-end) (percent)196.8
 207.2
 223.4
 191.8
 203.0
Price-earnings ratio (year-end) (times)19.1
 18.0
 22.4
 21.9
 15.9
Dividends paid (in millions)$2,104
 $1,959
 $1,866
 $1,762
 $1,693
Dividend yield (year-end) (percent)4.5
 4.6
 4.2
 4.9
 4.5
Dividend payout ratio (percent)86.0
 82.7
 95.0
 107.1
 72.0
Shares outstanding (in thousands):         
Average951,332
 910,024
 897,194
 876,755
 871,388
Year-end990,394
 911,721
 907,777
 887,086
 867,768
Stockholders of record (year-end)126,338
 131,771
 137,369
 143,800
 149,628
(a)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016. See Note 12 under "Merger with Southern Company Gas"
Acquisitions and Dispositions
See Note 15 to the financial statements for additional information.
(b)A reclassification of debt issuance costs from Total Assets to Long-term debt of $202 million, $139 million, and $133 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(c)A reclassification of deferred tax assets from Total Assets of $488 million, $143 million, and $202 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
Table of ContentsIndex to Financial Statements

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA (continued)
For the Periods Ended December 2012 through 2016
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax). In 2018, net income attributable to Gulf Power was $160 million.
Alabama Power
On September 6, 2019, Alabama Power entered into a purchase and Subsidiary Companies 2016 Annual Reportsale agreement (Autauga Combined Cycle Acquisition) to acquire all of the equity interests in Tenaska Alabama II Partners, L.P. Tenaska Alabama II Partners, L.P. owns and operates an approximately 885-MW combined cycle generation facility in Autauga County, Alabama. The transaction is expected to close by September 1, 2020. As part of the Autauga Combined Cycle Acquisition, Alabama Power will assume an existing power sales agreement under which the full output of the generating facility remains committed to another third party for its remaining term of approximately three years. The estimated revenues from the power sales agreement are expected to offset the associated costs of operation during the remaining term.
 
2016(a)

 2015
 2014
 2013
 2012
Operating Revenues (in millions):         
Residential$6,614
 $6,383
 $6,499
 $6,011
 $5,891
Commercial5,394
 5,317
 5,469
 5,214
 5,097
Industrial3,171
 3,172
 3,449
 3,188
 3,071
Other55
 115
 133
 128
 128
Total retail15,234
 14,987
 15,550
 14,541
 14,187
Wholesale1,926
 1,798
 2,184
 1,855
 1,675
Total revenues from sales of electricity17,160
 16,785
 17,734
 16,396
 15,862
Natural gas revenues1,596
 
 
 
 
Other revenues1,140
 704
 733
 691
 675
Total$19,896
 $17,489
 $18,467
 $17,087
 $16,537
Kilowatt-Hour Sales (in millions):         
Residential53,337
 52,121
 53,347
 50,575
 50,454
Commercial53,733
 53,525
 53,243
 52,551
 53,007
Industrial52,792
 53,941
 54,140
 52,429
 51,674
Other883
 897
 909
 902
 919
Total retail160,745
 160,484
 161,639
 156,457
 156,054
Wholesale sales34,896
 30,505
 32,786
 26,944
 27,563
Total195,641
 190,989
 194,425
 183,401
 183,617
Average Revenue Per Kilowatt-Hour (cents):         
Residential12.40
 12.25
 12.18
 11.89
 11.68
Commercial10.04
 9.93
 10.27
 9.92
 9.62
Industrial6.01
 5.88
 6.37
 6.08
 5.94
Total retail9.48
 9.34
 9.62
 9.29
 9.09
Wholesale5.52
 5.89
 6.66
 6.88
 6.08
Total sales8.77
 8.79
 9.12
 8.94
 8.64
Average Annual Kilowatt-Hour         
Use Per Residential Customer12,387
 13,318
 13,765
 13,144
 13,187
Average Annual Revenue         
Per Residential Customer$1,541
 $1,630
 $1,679
 $1,562
 $1,540
Plant Nameplate Capacity         
Ratings (year-end) (megawatts)46,291
 44,223
 46,549
 45,502
 45,740
Maximum Peak-Hour Demand (megawatts):         
Winter32,272
 36,794
 37,234
 27,555
 31,705
Summer35,781
 36,195
 35,396
 33,557
 35,479
System Reserve Margin (at peak) (percent)(b)
34.2
 33.2
 19.8
 21.5
 20.8
Annual Load Factor (percent)61.5
 59.9
 59.6
 63.2
 59.5
Plant Availability (percent):         
Fossil-steam86.4
 86.1
 85.8
 87.7
 89.4
Nuclear93.3
 93.5
 91.5
 91.5
 94.2
The completion of the Autauga Combined Cycle Acquisition is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC and the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
(a)The 2016 selected financial and operating data includes the operations of Southern Company Gas from the date of the Merger, July 1, 2016, through December 31, 2016. See Note 12 under "Merger with Southern Company Gas" for additional information.
(b)Beginning in 2014, system reserve margin is calculated to include unrecognized capacity.
The ultimate outcome of this matter cannot be determined at this time.
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SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA (continued)
For the Periods Ended December 2012 through 2016
Southern CompanyPower
Acquisitions
During 2019, Southern Power acquireda controlling interest in the fuel cell generation facility listed below and Subsidiary Companies 2016 Annual Report
 
2016(a)

 2015
 2014
 2013
 2012
Source of Energy Supply (percent):         
Coal30.6
 32.3
 39.3
 36.9
 35.2
Nuclear14.7
 15.2
 14.8
 15.5
 16.2
Oil and gas42.2
 42.7
 37.0
 37.2
 38.2
Hydro2.1
 2.6
 2.5
 3.9
 1.7
Other renewables2.4
 0.8
 0.4
 0.1
 0.1
Purchased power8.0
 6.4
 6.0
 6.4
 8.6
Total100.0
 100.0
 100.0
 100.0
 100.0
Gas Sales Volumes (mmBtu in millions):         
Firm296
 
 
 
 
Interruptible53
 
 
 
 
Total349
 
 
 
 
Traditional Electric Operating Company
   Customers (year-end) (in thousands):
         
Residential3,970
 3,928
 3,890
 3,859
 3,832
Commercial(b)
595
 590
 586
 582
 579
Industrial(b)
17
 17
 17
 17
 17
Other11
 11
 11
 9
 8
Total electric customers4,593
 4,546
 4,504
 4,467
 4,436
Gas distribution operations customers4,586
 
 
 
 
Total utility customers9,179
 4,546
 4,504
 4,467
 4,436
Employees (year-end)32,020
 26,703
 26,369
 26,300
 26,439
acquired the Skookumchuck wind facility discussed under "Construction ProgramsSouthern Power" herein. Acquisition-related costs were expensed as incurred and were not material.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Southern Power Ownership
Percentage
CODPPA CounterpartyPPA Remaining Period
DSGP(a)
Fuel Cell28Delaware100% of Class B
N/A(b)
Delmarva Power & Light15 years
(a)During 2019, Southern Power made a total investment of approximately $167 million in DSGP and now holds a controlling interest and consolidates 100% of DSGP's operating results. Southern Power records net income attributable to noncontrolling interests for approximately 10 MWs of the facility.
(b)Southern Power's 18-MW share of the facility was repowered between June and August 2019. In December 2019, a Class C member joined the existing partnership between the Class A member and Southern Power and made an investment to repower the remaining 10 MWs. In connection with the Class C member joining the partnership, the original fuel cells (before repower), which had a carrying value of approximately $55 million, were distributed to the Class A member in a non-cash transaction that was excluded from the statements of cash flows.
Development Projects
Southern Power continues to evaluate and refine the deployment of the remaining wind turbine equipment purchased in 2016 and 2017 to development and construction projects. Wind projects utilizing equipment purchased in 2016 and 2017, and reaching commercial operation by the end of 2020 and 2021, are expected to qualify for 100% and 80% PTCs, respectively. The significant majority of this equipment either has been deployed to completed projects, projects under construction, or projects that are probable of being completed or has been sold to third parties. Sales during 2019 resulted in gains totaling approximately $17 million.
Sales of Renewable Facility Interests
In May 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion. Since Southern Power retained control of the limited partnership through its wholly-owned general partner, the sale was recorded as an
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Southern Company and Subsidiary Companies 2019 Annual Report

equity transaction. Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with their partnership ownership interests.
In December 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of eight operating wind facilities, to three financial investors for approximately $1.2 billion. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive 99% of the tax attributes, including future PTCs.
Southern Power consolidates each entity, as the primary beneficiary of the VIE, since it controls the most significant activities, including operating and maintaining the assets.
Sales of Natural Gas and Biomass Plants
In December 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million, including working capital adjustments. In contemplation of this sale transaction, Southern Power recorded an asset impairment charge of approximately $119 million ($89 million after tax) in May 2018. Pre-tax net income for the Florida Plants was $49 million for the period from January 1, 2018 to December 4, 2018.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments. Southern Power recorded a gain of $23 million ($88 million after tax) on the sale. The pre-tax net income for Plant Nacogdoches was $13 million and $27 million for the period from January 1, 2019 to June 13, 2019 and for the year ended 2018, respectively.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments. The sale resulted in a gain of approximately $39 million ($23 million after tax) in 2020. Pre-tax net income for Plant Mankato was $29 million and immaterial for the years ended December 31, 2019 and 2018, respectively. The assets and liabilities of Plant Mankato are classified as held for sale as of December 31, 2019 and 2018.
Southern Company Gas
In June 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC. Southern Company Gas and American Water Enterprises LLC entered into a transition services agreement whereby Southern Company Gas provided certain administrative and operational services through November 4, 2018.
In July 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Southern Company Gas and South Jersey Industries, Inc. entered into transition services agreements whereby Southern Company Gas will provide certain administrative and operational services through no later than July 31, 2020.
In July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. Southern Company Gas and NextEra Energy entered into a transition services agreement whereby Southern Company Gas will provide certain administrative and operational services through no later than July 29, 2020.
The Southern Company Gas Dispositions resulted in a net loss of $51 million in 2018, which includes $342 million of tax expense. The after-tax impacts of these dispositions included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. In addition, a goodwill impairment charge of $42 million was recorded during 2018 in contemplation of the sale of Pivotal Home Solutions.
The Southern Company Gas Dispositions materially decreased Southern Company Gas' subsequent earnings and cash flows. For the year ended December 31, 2018, pre-tax earnings attributable to these dispositions were $297 million, which includes a $291 million gain on dispositions, net and a $42 million goodwill impairment. Due to the seasonal nature of the natural gas business and other factors including, but not limited to, weather, regulation, competition, customer demand, and general economic conditions, these results are not necessarily indicative of the results to be expected for any other period.
On May 29, 2019, Southern Company Gas sold its investment in Triton, a cargo container leasing company. This disposition resulted in a pre-tax loss of $6 million and a net after-tax gain of $7 million as a result of reversing a $13 million federal income tax valuation allowance.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an
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Southern Company and Subsidiary Companies 2019 Annual Report

aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
Environmental Matters
The Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and other natural resources. The Southern Company system maintains comprehensive environmental compliance and GHG strategies to assess both current and upcoming requirements and compliance costs associated with these environmental laws and regulations. The costs required to comply with environmental laws and regulations and to achieve stated goals, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. A major portion of these costs is expected to be recovered through retail and wholesale rates, including existing ratemaking and billing provisions. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of operations for the Subsidiary Registrants. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be recovered on a timely basis in rates for the traditional electric operating companies and the natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and Southern Power.
Alabama Power and Mississippi Power recover environmental compliance costs through separate mechanisms, Rate CNP Compliance and the ECO Plan, respectively. Georgia Power's base rates include an Environmental Compliance Cost Recovery (ECCR) tariff that allows for the recovery of environmental compliance costs. The natural gas distribution utilities of Southern Company Gas generally recover environmental remediation expenditures through rate mechanisms approved by their applicable state regulatory agencies. See Notes 2 and 3 to the financial statements for additional information.
Southern Power's PPAs generally contain provisions that permit charging the counterparty with some of the new costs incurred as a result of changes in environmental laws and regulations. Since Southern Power's units are newer natural gas and renewable generating facilities, costs associated with environmental compliance for these facilities have been less significant than for similarly situated coal or older natural gas generating facilities. Environmental, natural resource, and land use concerns, including the applicability of air quality limitations, the potential presence of wetlands or threatened and endangered species, the availability of water withdrawal rights, uncertainties regarding impacts such as increased light or noise, and concerns about potential adverse health impacts can, however, increase the cost of siting and operating any type of future electric generating facility. The impact of such laws, regulations, and other considerations on Southern Power and subsequent recovery through PPA provisions cannot be determined at this time.
Further, increased costs that are recovered through regulated rates could contribute to reduced demand for electricity and natural gas, which could negatively affect results of operations, cash flows, and/or financial condition. Additionally, many commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to affect their demand for electricity and natural gas.
Although the timing, requirements, and estimated costs could change as environmental laws and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are initiated or completed, estimated capital
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expenditures through 2024 based on the current environmental compliance strategy for the Southern Company system and the traditional electric operating companies are as follows:
 20202021202220232024Total
 (in millions)
Southern Company$223
$250
$244
$214
$131
$1,062
Alabama Power80
77
82
97
103
439
Georgia Power115
156
152
105
23
551
Mississippi Power28
17
10
12
5
72
These estimates do not include any costs associated with potential regulation of GHG emissions. See "Global Climate Issues" herein for additional information. The Southern Company system also anticipates substantial expenditures associated with ash pond closure and ground water monitoring under the CCR Rule and related state rules, which are reflected in the applicable Registrants' ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein and Note 6 to the financial statements for additional information.
Environmental Laws and Regulations
Air Quality
The Southern Company system reduced SO2 and NOX air emissions by 98% and 88%, respectively, from 1990 to 2018. The Southern Company system reduced mercury air emissions by over 96% from 2005 to 2018.
The EPA finalized regional haze regulations in 2005 and 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, including national parks and wilderness areas. States are required to submit state implementation plans for the second ten-year planning period (2018 through 2028) by July 31, 2021. These plans could require further reductions in particulate matter, SO2, and/or NOX, which could result in increased compliance costs at affected electric generating units.
Water Quality
In 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life at existing power plants. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms. The Southern Company system is conducting these studies and currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. The impact of this rule will depend on the outcome of these plant-specific studies, any additional protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permit based on site-specific factors, and the outcome of any legal challenges.
In 2015, the EPA finalized the steam electric effluent limitations guidelines (ELG) rule (2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent limits on flue gas desulfurization (scrubber) wastewater discharges. The 2015 technology-based limits and the CCR Rule require extensive changes to existing ash and wastewater management systems or the installation and operation of new ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to require capital expenditures and increased operational costs for the traditional electric operating companies' coal-fired electric generation. State environmental agencies will incorporate specific compliance applicability dates in the NPDES permitting process for each ELG waste stream. On November 22, 2019, the EPA published a proposed rule that changes certain requirements in the 2015 ELG Rule, including adjusting compliance limits and providing certain exemptions for boilers that are expected to be retired by December 31, 2028 and for low utilization boilers (876,000 MWh/year or less). The proposal also extends the latest applicability date for flue gas desulfurization wastewater to December 31, 2025 but retains the latest applicability date of December 31, 2023 for bottom ash transport water. The impact of any changes to the 2015 ELG Rule will depend on the content of a new final rule, which the EPA plans to finalize by August 2020, and the outcome of any legal challenges.
Coal Combustion Residuals
In 2015, the EPA finalized non-hazardous solid waste regulations for the disposal of CCR, including coal ash and gypsum, in landfills and surface impoundments (ash ponds) at active electric generating power plants. The CCR Rule requires landfills and
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ash ponds to be evaluated against a set of performance criteria and potentially closed if certain criteria are not met. Closure of existing landfills and ash ponds requires installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. In addition to the CCR Rule, the States of Alabama and Georgia finalized state regulations regarding the handling of CCR within their respective states. The State of Georgia received approval from the EPA on its partial permit program implementing the state CCR permit program in lieu of the federal self-implementing rule in accordance with the Water Infrastructure Improvements for the Nation Act. The State of Alabama also submitted its state CCR program for the EPA's review and approval. The State of Mississippi has not yet developed a state CCR permit program.
The EPA is in the process of amending portions of the CCR Rule. Most recently, on December 2, 2019, the EPA published a proposed rule that would require facilities to cease placement of both CCR and non-CCR waste in unlined surface impoundments as soon as technically feasible, no later than August 31, 2020. This proposed rule also includes extensions beyond August 31, 2020, provided that certain conditions are met. Impacts of the proposed rule to the Southern Company system are expected to be limited, as the traditional electric operating companies and SEGCO stopped sending coal ash from most of the generating units to unlined ponds in April 2019 and expect to stop sending coal ash from the remaining generating units within the timeframes and associated extensions allowed in the proposed rule.
Based on cost estimates for closure and monitoring of landfills and ash ponds pursuant to the CCR Rule, the Southern Company system recorded/revised AROs for each CCR unit in 2015 and has continued to update these cost estimates and ARO liabilities in subsequent years. The traditional electric operating companies expect to continue updating these estimates periodically as additional information related to ash pond closure methodologies, schedules, and/or costs becomes available. Alabama Power anticipates increasing the ARO for one of its ash ponds within the next nine months upon completion of a feasibility study and the related cost estimate, and the increase could be material. Additionally, the closure designs and plans in the States of Alabama and Georgia are subject to approval by environmental regulatory agencies. Absent continued recovery of ARO costs through regulated rates, results of operations, cash flows, and financial condition for Southern Company and the traditional electric operating companies could be materially impacted. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerIntegrated Resource Plan" herein and Note 6 to the financial statements for additional information.
The ultimate outcome of these matters cannot be determined at this time.
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and Southern Company Gas conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in their financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia (which represent substantially all of Southern Company Gas' accrued remediation costs) have all received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. The traditional electric operating companies and Southern Company Gas may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental Remediation" for additional information.
Global Climate Issues
On July 8, 2019, the EPA published the final Affordable Clean Energy rule (ACE Rule) to repeal and replace the CPP. The ACE Rule requires states to develop unit-specific CO2 emission rate standards for existing coal-fired units based on heat-rate efficiency improvements. The ACE Rule is being challenged in the D.C. Circuit Court of Appeals and Georgia Power is an intervenor in the litigation in support of the rule, as are other industry parties. The ultimate impact of the ACE Rule to the Southern Company system will depend on state implementation plan requirements and the outcome of associated legal challenges and cannot be determined at this time.
Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy; however, associated impacts are currently unknown. The Southern Company system has transitioned from an electric generating mix of 70% coal and 15% natural gas in 2007 to a mix of 22% coal and 52% natural gas in 2019, along with over 8,300 MWs of renewable resources. This transition has been supported in part by the Southern Company system retiring over 5,600 MWs of coal- and oil-fired generating capacity since 2010 and converting over 3,400 MWs of generating capacity from coal to natural gas since 2015. In addition, Southern Company Gas has replaced approximately 5,600 miles of bare steel and
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cast-iron pipe, resulting in removal of approximately 2.5 million metric tons of GHG from its natural gas distribution system since 1998.
The following table provides the Registrants' 2018 and preliminary 2019 GHG emissions based on ownership or financial control of facilities:
 2018Preliminary 2019
 
(in million metric tons of CO2 equivalent)
Southern Company(a)(b)
102
88
Alabama Power36
32
Georgia Power30
27
Mississippi Power8
9
Southern Power(b)
14
13
Southern Company Gas(b)
1
1
(a)Includes non-registrant subsidiaries.
(b)The 2016 selected financial2018 and operating data includes the operations of Southern Company Gas frompreliminary 2019 amounts include GHG emissions attributable to disposed assets through the date of the Merger, July 1, 2016, through December 31, 2016.applicable disposition. See Note 12 under "Merger with Southern Company Gas"15 to the financial statements for additional information.
(b)A reclassification of customers from commercial to industrial is reflected for years 2012-2015 to be consistent with the rate structure approved by the Georgia PSC. The impact to operating revenues, kilowatt-hour sales, and average revenue per kilowatt-hour by class is not material.information regarding disposition activities.
Based on the preliminary 2019 amount above, the Southern Company system has achieved an estimated GHG emission reduction of 44% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. The Southern Company system's ability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies. The Southern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the use of natural gas for generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to lower GHG emissions. The Southern Company system is also evaluating methods of removing carbon from the atmosphere.

Regulatory Matters
Alabama Power
Alabama Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Alabama PSC. Alabama Power currently recovers its costs from the regulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to address current events impacting Alabama Power. See Note 2 to the financial statements under "Alabama Power" for additional information regarding Alabama Power's rate mechanisms and accounting orders.
Petition for Certificate of Convenience and Necessity
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, both as more fully described below, as well as the Autauga Combined Cycle Acquisition. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. This filing was predicated on the results of Alabama Power's 2019 IRP provided to the Alabama PSC, which identified an approximately 2,400-MW resource need for Alabama Power, driven by the need for additional winter reserve capacity. See Note 15 to the financial statements under "Alabama Power" for additional information regarding the Autauga Combined Cycle Acquisition.
The procurement of these resources is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC. The completion of the Autauga Combined Cycle Acquisition is also subject to approval by the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
On May 8, 2019, Alabama Power entered into an Agreement for Engineering, Procurement, and Construction with Mitsubishi Hitachi Power Systems Americas, Inc. and Black & Veatch Construction, Inc. to construct an approximately 720-MW combined cycle facility at Plant Barry (Plant Barry Unit 8), which is expected to be placed in service by the end of 2023.
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ALABAMA POWER COMPANYThe capital investment associated with the construction of Plant Barry Unit 8 and the Autauga Combined Cycle Acquisition is currently estimated to total approximately $1.1 billion.
FINANCIAL SECTIONAlabama Power entered into additional long-term PPAs totaling approximately 640 MWs of generating capacity consisting of approximately 240 MWs of combined cycle generation expected to begin later in 2020 and approximately 400 MWs of solar generation coupled with battery energy storage systems (solar/battery systems) expected to begin in 2022 through 2024. The terms of the agreements for the solar/battery systems permit Alabama Power to use the energy and retire the associated renewable energy credits (REC) in service of customers or to sell RECs, separately or bundled with energy.
Upon certification, Alabama Power expects to recover costs associated with Plant Barry Unit 8 pursuant to its Rate CNP New Plant. Additionally, Alabama Power expects to recover costs associated with the Autauga Combined Cycle Acquisition through the inclusion in Rate RSE of revenues from the existing power sales agreement and, on expiration of that agreement, pursuant to Rate CNP New Plant. The recovery of costs associated with laws, regulations, and other such mandates directed at the utility industry are expected to be recovered through Rate CNP Compliance. Alabama Power expects to recover the capacity-related costs associated with the PPAs through its Rate CNP PPA. In addition, fuel and energy-related costs are expected to be recovered through Rate ECR. Any remaining costs associated with the Autauga Combined Cycle Acquisition and Plant Barry Unit 8 will be incorporated through the annual filing of Rate RSE.
The ultimate outcome of these matters cannot be determined at this time.
Construction Work in Progress Accounting Order
On October 1, 2019, the Alabama PSC acknowledged that Alabama Power would begin certain limited preparatory activities associated with Plant Barry Unit 8 construction to meet the target in-service date by authorizing Alabama Power to record the related costs as CWIP prior to the issuance of an order on the CCN petition. Should a CCN not be granted and Alabama Power does not proceed with the related construction of Plant Barry Unit 8, Alabama Power may transfer those costs and any costs that directly result from the non-issuance of the CCN to a regulatory asset which would be amortized over a five-year period. If the balance of incurred costs reaches 5% of the estimated in-service cost of the total project prior to issuance of an order on the CCN petition, Alabama Power will confer with the Alabama PSC regarding the appropriateness of additional authorization. The Sierra Club subsequently filed a petition for reconsideration of the accounting order. The Alabama PSC voted to deny the petition for reconsideration on January 7, 2020.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
In May 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2019, Alabama Power's equity ratio was approximately 50%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, during a year without a Rate RSE upward adjustment, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%. During a year
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTINGwith a Rate RSE upward adjustment, if Alabama Power's actual WCER exceeds 6.15%, customers receive 50% of the amount between 6.15% and 6.90% and all amounts in excess of an actual WCER of 6.90%.
In conjunction with these modifications to Rate RSE, in May 2018, Alabama Power Company 2016 Annual Reportconsented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and to return $50 million to customers through bill credits in 2019.
The management ofOn November 27, 2019, Alabama Power Company (the Company) is responsiblemade its required annual Rate RSE submission to the Alabama PSC of projected data for establishingcalendar year 2020. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2020.
During 2019, Alabama Power provided to the Alabama PSC and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectivesAlabama Office of the control system are met.
Under management's supervision, an evaluationAttorney General information related to the operation and utilization of the design and effectiveness of the Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2016.
/s/ Mark A. Crosswhite
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
/s/ Philip C. Raymond
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
February 21, 2017

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Alabama Power Company

We have audited the accompanying balance sheets and statements of capitalization of Alabama Power Company (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2016. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our auditsRate RSE, in accordance with the standardsrules governing the operation of Rate RSE. The ultimate outcome of this matter cannot be determined at this time.
At December 31, 2019, Alabama Power's WCER exceeded 6.15%, resulting in Alabama Power establishing a current regulatory liability of $53 million for Rate RSE refunds, which will be refunded to customers through bill credits in April 2020.
Rate CNP New Plant
Rate CNP New Plant allows for recovery of Alabama Power's retail costs associated with newly developed or acquired certificated generating facilities placed into retail service. No adjustments to Rate CNP New Plant occurred during the Public Company Accounting Oversight Board (United States). Those standards requireperiod 2017 through 2019. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information.
Rate CNP PPA
Rate CNP PPA allows for the recovery of Alabama Power's retail costs associated with certificated PPAs. No adjustments to Rate CNP PPA occurred during the period 2017 through 2019 and no adjustment is expected for 2020.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to factors that we planare calculated and performsubmitted to the auditAlabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to obtain reasonable assurance about whetherbe recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basisadjusted for designing audit procedures that are appropriatedifferences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the circumstances,billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but notwill affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On November 27, 2019, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the purposebilling month of expressingJanuary 2020.
Rate ECR
Rate ECR recovers Alabama Power's retail energy costs based on an opinionestimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements assessingare adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed gives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income but will impact operating cash flows. The Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
On December 3, 2019, the Alabama PSC approved a decrease to Rate ECR from 2.353 to 2.160 cents per KWH, equal to 1.82%, or approximately $102 million annually, effective January 1, 2020. The rate will adjust to 5.910 cents per KWH in January 2021 absent a further order from the Alabama PSC.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Tax Reform Accounting Order
In May 2018, the Alabama PSC approved an accounting principlesorder that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power to apply the remaining deferred balance of approximately $39 million to increase the balance in the NDR. See "Rate NDR" herein and significant estimates made by management,Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Joint Ownership Agreements" for additional information regarding the joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as evaluatingagreement by Alabama Power. Alabama Power will continue to monitor the overallstatus of Mississippi Power's proposed RMP and associated regulatory process as well as the proposed transmission and system reliability improvements. Alabama Power will review all the facts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of Plant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR enhance Alabama Power's ability to mitigate the financial statement presentation. We believe that our audits provide a reasonable basiseffects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear.
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for our opinion.

2020, which is included in other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In our opinion, such financial statements (pages II-182 to II-226) present fairly, in all material respects,December 2017, the financial positionreserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power Company asexpects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of December 31, 2016 and 2015, and the results of its operations and itsmaintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows for each of the three years in the period ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.flows.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 21, 2017

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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report


DEFINITIONSEnvironmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
On April 15, 2019, Alabama Power retired Plant Gorgas Units 8, 9, and 10 and reclassified approximately $654 million of the unrecovered asset balances to regulatory assets, which are being recovered over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 2 to the financial statements under "Alabama Power" and Note 6 to the financial statements for additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through an alternate rate plan, which includes traditional base tariffs, Demand-Side Management (DSM) tariffs, the ECCR tariff, and Municipal Franchise Fee (MFF) tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariff. See Note 2 to the financial statements under "Georgia PowerRate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
Term(a)Meaning
AFUDCAllowanceEffective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for funds used during construction
AROAsset retirement obligation
ASCAccounting Standards Codification
ASUAccounting Standards Update
CCRCoal combustion residuals
Clean Air ActClean Air Act Amendmentsadditional information on recovery of 1990
CO2
Carbon dioxide
DOEU.S. Department of Energy
EPAU.S. Environmental Protection Agency
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
GAAPU.S. generally accepted accounting principles
Georgia PowerGeorgia Power Company
Gulf PowerGulf Power Company
IRSInternal Revenue Service
ITCInvestment tax credit
KWHKilowatt-hour
LIBORLondon Interbank Offered Rate
Mississippi PowerMississippi Power Company
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MWMegawatt
NDRNatural Disaster Reserve
NRCU.S. Nuclear Regulatory Commission
OCIOther comprehensive income
power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PPAPower purchase agreement
PSCPublic Service Commission
Rate CNPRate Certificated New Plant
Rate CNP ComplianceRate Certificated New Plant Compliance
Rate CNP PPARate Certificated New Plant Power Purchase Agreement
Rate ECRRate Energy Cost Recovery
Rate NDRRate Natural Disaster Reserve
Rate RSERate Stabilization and Equalization plan
ROEReturn on equity
S&PS&P Global Ratings, a division of S&P Global Inc.
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
SEGCOSouthern Electric Generating Company
Southern CompanyThe Southern Company
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiariescompliance costs for CCR AROs.
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DEFINITIONS
(continued)

Term(b)Meaning
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SEGCO, Southern Nuclear, SCS, Southern LINC, PowerSecure, Inc. (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.
Southern PowerSouthern Power Company and its subsidiaries
traditional electric operating companiesAlabama Power Company, Georgia Power, Gulf Power, and Mississippi PowerTotals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS(continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report
OVERVIEW
(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP continued in effect until December 31, 2019. Furthermore, through December 31, 2019, Georgia Power retained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60/40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariffs, ECCR tariff, DSM tariffs, or MFF tariffs in 2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE was set at 10.95% and earnings were evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% were to be directly refunded to customers, with the remaining one-third retained by Georgia Power. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2019 and 2018, Georgia Power's retail ROE exceeded 12.00% and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia Power has reduced regulatory assets by a total of approximately $110 million and expects to refund a total of approximately $110 million to customers, subject to review and approval by the Georgia PSC. See "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Business Activities
Southern Company is a holding company that owns all of the common stock of three traditional electric operating companies, as well as the parent entities of Southern Power and Southern Company Gas, and owns other direct and indirect subsidiaries. The primary businesses of the Southern Company system are electricity sales by the traditional electric operating companies and Southern Power and the distribution of natural gas by Southern Company Gas. Southern Company's reportable segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas.
The traditional electric operating companies – Alabama Power, Company (the Company) operates as aGeorgia Power, and Mississippi Power – are vertically integrated utilityutilities providing electric service to retail and wholesale customers within its traditional service territory located in the State of Alabamathree Southeastern states in addition to wholesale customers in the Southeast.
Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Power continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions, dispositions, and sales of partnership interests, development and construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, IPPs, municipalities, electric cooperatives, and other load-serving entities, as well as commercial and industrial customers. In general, Southern Power commits to the construction or acquisition of new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas. Southern Company Gas owns natural gas distribution utilities in four states – Illinois, Georgia, Virginia, and Tennessee – and is also involved in several other complementary businesses. Southern Company Gas manages its business through four reportable segments – gas distribution operations, gas pipeline investments, wholesale gas services, which includes Sequent, a natural gas asset optimization company, and gas marketing services, which includes SouthStar, a provider of energy-related products and services to natural gas markets – and one non-reportable segment, all other. See Notes 7 and 16 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of the Company's business of providingSouthern Company system's electric service.service and natural gas businesses. These factors include the ability to maintain a constructive regulatory environment,environments, to maintain and grow energy sales and customers, and to effectively manage and secure timely recovery of prudently-incurred costs. These costs include those related to projected long-term demand growth,growth; stringent environmental standards, including CCR rules; safety; system reliability fuel, capital expenditures, and resilience; fuel; natural gas; restoration following major storms. storms; and capital expenditures, including constructing new electric generating plants and expanding and improving the electric transmission and electric and natural gas distribution systems.
The Company hastraditional electric operating companies and natural gas distribution utilities have various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Southern Company system for the foreseeable future. See Note 2 to the financial statements for additional information.
Southern Power's future earnings will depend upon the parameters of the wholesale market and the efficient operation of its wholesale generating assets, as well as Southern Power's ability to execute its growth strategy and to develop and construct generating facilities. In addition, Southern Power's future earnings will depend upon the availability of federal and state ITCs and PTCs on its renewable energy projects, which could be impacted by future tax legislation. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions," "Construction Programs," and "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
Southern Company's other business activities include providing energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency. Other business activities also include investments in telecommunications, leveraged lease projects, and gas storage facilities. Management continues to evaluate the contribution of each of these activities to total shareholder return and may pursue acquisitions, dispositions, and other strategic ventures or investments accordingly.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Recent Developments
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax).
Alabama Power
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, as well as the acquisition of an existing combined cycle facility for a total capital investment of approximately $1.1 billion. The related costs would be recovered through existing rate mechanisms. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama Power" herein for additional information.
Georgia Power
Rate Case
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, including estimated rate increases totaling $342 million, $181 million, and $386 million effective January 1, 2020, January 1, 2021, and January 1, 2022, respectively. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans2019 ARP" herein for additional information.
Plant Vogtle Units 3 and 4 Status
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4 (with electric generating capacity of approximately 1,100 MWs each). Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code. In December 2017, the Georgia PSC approved Georgia Power's recommendation to continue construction. The current expected in-service dates remain November 2021 for Unit 3 and November 2022 for Unit 4.
In the second quarter 2018, Georgia Power revised its total project capital cost forecast to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds), with respect to Georgia Power's ownership interest. As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast.
As a result of the increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4. Following the vote to continue construction, Georgia Power entered into agreements to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners and to provide funding with respect to a MEAG Power wholly-owned subsidiary's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics. In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4.
In March 2019, Georgia Power entered into the Amended and Restated Loan Guarantee Agreement with the DOE, under which the proceeds of borrowings may be used to reimburse Georgia Power for Eligible Project Costs incurred in connection with its construction of Plant Vogtle Units 3 and 4, up to approximately $5.130 billion. At December 31, 2019, Georgia Power had a total of $3.8 billion of borrowings outstanding under the related multi-advance credit facilities.
The ultimate outcome of these matters cannot be determined at this time.
See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein and Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company continuesand Subsidiary Companies 2019 Annual Report

Mississippi Power
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million related to the Kemper County energy facility, which was suspended in 2017, primarily associated with the expected close out of a DOE contract related to the Kemper County energy facility, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In December 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. Mine reclamation activities are expected to be substantially completed in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion, and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024. See Note 2 to the financial statements under "Mississippi PowerKemper County Energy Facility" and Note 3 to the financial statements for additional information, including remaining contingencies related to the Kemper IGCC.
On November 26, 2019, Mississippi Power filed a base rate case (Mississippi Power 2019 Base Rate Case) with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a 53% average equity ratio and a 7.728% return on investment. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time. See Note 2 to the financial statements under "Mississippi Power2019 Base Rate Case" for additional information.
Southern Power
During 2019, Southern Power completed construction and achieved commercial operation of the 100-MW Wildhorse Mountain wind facility, acquired and continued construction of the 136-MW Skookumchuck wind facility, and continued construction of the 200-MW Reading wind facility. In addition, Southern Power acquired a majority interest in DSGP, an affiliate of Bloom Energy, that owns and operates fuel cell generation facilities, for a total purchase price of approximately $167 million.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments.
Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Power" and Construction ProgramsSouthern Power" herein for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
During 2019, the natural gas distribution utilities have been involved in the following regulatory proceedings:
On September 25, 2019, the Virginia Commission approved Virginia Natural Gas' Steps to Advance Virginia's Energy (SAVE) program request to amend and extend the program through 2024 with estimated capital spend totaling approximately $365 million.
On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase for Nicor Gas, including $65 million related to the recovery of investments under the Investing in Illinois program, which became effective October 8, 2019.
On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase for Atlanta Gas Light, effective January 1, 2020.
See FUTURE EARNINGS POTENTIAL – "Regulatory MattersSouthern Company GasRate Proceedings" herein and Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
Also during 2019, Southern Company Gas recorded a pre-tax impairment charge of $91 million ($69 million after tax) related to a natural gas storage facility in Louisiana. See Note 3 to the financial statements under "Other MattersSouthern Company Gas" for additional information.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
See FUTURE EARNINGS POTENTIAL – "Acquisitions and DispositionsSouthern Company Gas" herein for information regarding Southern Company Gas' 2018 disposition activity.
Key Performance Indicators
In striving to achieve attractive risk-adjusted returns while providing cost-effective energy to more than eight million electric and gas utility customers collectively, the traditional electric operating companies and Southern Company Gas continue to focus on several key performance indicators. These indicators including,include, but are not limited to, customer satisfaction, plant availability, electric and natural gas system reliability, and execution of major construction projects. In addition, Southern Company and the Subsidiary Registrants focus on earnings per share (EPS) and net income, after dividendsrespectively, as a key performance indicator. See RESULTS OF OPERATIONS herein for information on preferredthe Registrants' financial performance. See RESULTS OF OPERATIONS – "Southern Company GasOperating Metrics" for additional information on Southern Company Gas' operating metrics, including Heating Degree Days, customer count, and preference stock. volumes of natural gas sold.
The Company's financial success of the traditional electric operating companies and Southern Company Gas is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management usesThe traditional electric operating companies use customer satisfaction surveys to evaluate the Company'stheir results and generally targetstarget the top quartile of these surveys in measuring performance. Reliability indicators are also used to evaluate results. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate RSE" and " – Mississippi PowerPerformance Evaluation Plan" herein for additional information on Alabama Power's Rate RSE and Mississippi Power's PEP rate plan, respectively, both of which contain mechanisms that directly tie customer service indicators to the allowed equity return.
See Southern Power continues to focus on several key performance indicators, including, but not limited to, the equivalent forced outage rate and contract availability to evaluate operating results and help ensure its ability to meet its contractual commitments to customers.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

RESULTS OF OPERATIONS
Southern Company
Consolidated net income attributable to Southern Company was $4.7 billion in 2019, an increase of $2.5 billion, or 112.9%, from the prior year. The increase was primarily due to the $2.6 billion ($1.4 billion after tax) gain on the sale of Gulf Power in 2019 and a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4. See "Electricity BusinessEstimated Loss on Plants Under Construction" herein and Notes 2 and 15 to the financial statements under "Georgia PowerNuclear Construction" and "Southern Company," respectively, for additional information.
Basic EPS was $4.53 in 2019 and $2.18 in 2018. Diluted EPS, which factors in additional shares related to stock-based compensation, was $4.50 in 2019 and $2.17 in 2018. EPS for 2019 and 2018 was negatively impacted by $0.11 and $0.04 per share, respectively, as a result of increases in the average shares outstanding. See Note 8 to the financial statements under "Outstanding Classes of Capital Stock – Southern Company" for additional information.
Southern Company has paid dividends on its common stock since 1948. Dividends paid per share of common stock were $2.46 in 2019 and $2.38 in 2018. In January 2020, Southern Company declared a quarterly dividend of 62 cents per share. For 2019, the dividend payout ratio was 54% compared to 109% for 2018. The decrease was due to the increase in earnings in 2019.
Discussion of Southern Company's results of operations is divided into three parts – the Southern Company system's primary business of electricity sales, its gas business, and its other business activities.
 2019 2018
 (in millions)
Electricity business$3,268
 $2,304
Gas business585
 372
Other business activities886
 (450)
Net Income$4,739
 $2,226
Electricity Business
Southern Company's electric utilities generate and sell electricity to retail and wholesale customers. The results of operations discussed below include the results of Gulf Power through December 31, 2018. See Note 15 to the financial statements under "Southern Company" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income for the electricity business follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Electric operating revenues$17,095
 $(1,476)
Fuel3,622
 (1,015)
Purchased power816

(155)
Cost of other sales76
 10
Other operations and maintenance4,479
 (156)
Depreciation and amortization2,472
 (93)
Taxes other than income taxes1,011
 (87)
Estimated loss on plants under construction24
 (1,073)
Impairment charges3
 (153)
(Gain) loss on dispositions, net(21) (21)
Total electric operating expenses12,482
 (2,743)
Operating income4,613
 1,267
Allowance for equity funds used during construction121
 (10)
Interest expense, net of amounts capitalized987
 (48)
Other income (expense), net234
 90
Income taxes708
 501
Net income3,273
 894
Less:   
Dividends on preferred and preference stock of subsidiaries15
 (1)
Net income (loss) attributable to noncontrolling interests(10) (69)
Net Income Attributable to Southern Company$3,268
 $964
Electric Operating Revenues
Electric operating revenues for 2019 were $17.1 billion, reflecting a $1.5 billion decrease from 2018. Details of electric operating revenues were as follows:
 2019 2018
 (in millions)
Retail electric — prior year$15,222
  
Estimated change resulting from —   
Rates and pricing581
  
Sales decline(143)  
Weather29
  
Fuel and other cost recovery(392)  
Gulf Power disposition(1,213)  
Retail electric — current year14,084
 $15,222
Wholesale electric revenues2,152
 2,516
Other electric revenues636
 664
Other revenues223
 169
Electric operating revenues$17,095
 $18,571
Percent change(7.9)% 0.2%
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Retail electric revenues decreased $1.1 billion, or 7.5%, in 2019 as compared to the prior year. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing in 2019 was primarily due to the impacts of Alabama Power's customer bill credits issued in 2018 related to the Tax Reform Legislation, additional capital investments recovered through Rate CNP Compliance, and lower Rate RSE customer refund in 2019 as compared to the prior year; Georgia Power's higher contributions from commercial and industrial customers with variable demand-driven pricing, NCCR rate increase effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018; and Mississippi Power's PEP and ECO Plan rate increases effective for the first billing cycle of September 2018.
Electric rates for the traditional electric operating companies include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of PPA costs, and do not affect net income. The traditional electric operating companies each have one or more regulatory mechanisms to recover other costs such as environmental and other compliance costs, storm damage, new plants, and PPA capacity costs.
See Note 2 to the financial statements under "Alabama Power," "Georgia Power," and "Mississippi Power" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth (decline) and weather.
Wholesale electric revenues consist of PPAs and short-term opportunity sales. Wholesale electric revenues from PPAs (other than solar and wind PPAs) have both capacity and energy components. Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment. Energy revenues will vary depending on fuel prices, the market prices of wholesale energy compared to the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Energy sales from solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or through a fixed price related to the energy. As a result, the ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Wholesale electric revenues at Mississippi Power include FERC-regulated MRA sales as well as market-based sales. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Southern Company system's variable cost to produce the energy.
Wholesale electric revenues from power sales were as follows:
 2019 2018
 (in millions)
Capacity and other$529
 $620
Energy1,623
 1,896
Total$2,152
 $2,516
In 2019, wholesale revenues decreased $364 million, or 14.5%, as compared to the prior year due to decreases of $273 million in energy revenues and $91 million in capacity revenues. Excluding the $28 million decrease associated with the sale of Gulf Power, energy revenues decreased $165 million at Southern Power and $80 million at the traditional electric operating companies. The decrease at Southern Power related to a $113 million decrease primarily in non-PPA short-term sales and a decrease in the market price of energy, as well as a $51 million decrease primarily in sales under PPAs from natural gas facilities. The decrease at the traditional electric operating companies was primarily due to lower natural gas prices. Excluding the $26 million decrease associated with the sale of Gulf Power, the decrease in capacity revenues was primarily related to the sales of Southern Power's Plant Oleander and Plant Stanton Unit A (together, the Florida Plants) in December 2018 and Southern Power's Plant Nacogdoches in June 2019. See Note 15 to the financial statements for additional information.
Other Electric Revenues
Other electric revenues decreased $28 million, or 4.2%, in 2019 as compared to the prior year. The decrease was primarily due to a decrease of $66 million related to the sale of Gulf Power, partially offset by increases at Georgia Power of $13 million in regulated power delivery construction and maintenance contracts and $11 million from outdoor lighting LED conversions and sales, as well as an increase at Alabama Power of $9 million from pole attachment agreements.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
       
Adjusted(b)
 Total
KWHs
 Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
(a)
 Total KWH Percent Change 
Weather-Adjusted Percent Change(a)
 (in billions)        
Residential48.5
 (11.1)% (10.7)% (1.1)% (0.8)%
Commercial49.1
 (8.1) (8.6) (1.1) (1.6)
Industrial50.1
 (6.1) (6.1) (2.9) (2.9)
Other0.8
 (9.1) (9.0) (5.8) (5.7)
Total retail148.5
 (8.5) (8.4)% (1.7) (1.8)%
Wholesale48.0
 (3.9)   (2.6)  
Total energy sales196.5
 (7.4)%   (1.9)%  
(a)Weather-adjusted KWH sales are estimated by removing from KWH sales the effect of deviations from normal temperature conditions, based on statistical models of the historical relationship between temperatures and energy sales. Normal temperature conditions are defined as those experienced in the applicable service territory over a specified historical period. This metric is useful because it allows trends in historical operations to be evaluated apart from the influence of weather conditions. Management also considers this metric in developing long-term capital and financial plans.
(b)Kilowatt-hour sales comparisons to the prior year were significantly impacted by the disposition of Gulf Power on January 1, 2019. These changes exclude Gulf Power.
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Excluding the impact of the Gulf Power disposition on January 1, 2019, weather-adjusted retail energy sales decreased 2.7 billion KWHs in 2019 as compared to the prior year primarily due to lower customer usage. Weather-adjusted residential usage decreases are primarily attributable to an increase in energy-efficient residential appliances and energy saving initiatives, partially offset by customer growth. Weather-adjusted commercial usage decreases are primarily attributable to an increase in energy saving initiatives and an ongoing migration to the electronic commerce business model. Industrial usage decreases are a result of changes in production levels primarily in the primary metals, paper, chemicals, and textiles sectors.
See "Electric Operating Revenues" above for a discussion of significant changes in wholesale revenues related to changes in price and KWH sales.
Other Revenues
Other revenues increased $54 million, or 32.0%, in 2019 as compared to the prior year. The increase was primarily due to increases at Georgia Power of $20 million from unregulated sales associated with new energy conservation projects and $14 million from unregulated power delivery construction and maintenance contracts, as well as an increase at Alabama Power of $11 million in unregulated sales of products and services.
Fuel and Purchased Power Expenses
The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the electric utilities purchase a portion of their electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the Southern Company system's generation and purchased power were as follows:
 2019 
2018(a)
Total generation (in billions of KWHs)
187
 191
Total purchased power (in billions of KWHs)
18
 14
Sources of generation (percent) —

 
Gas52
 48
Coal22
 27
Nuclear16
 16
Hydro3
 3
Other7
 6
Cost of fuel, generated (in cents per net KWH) 

 
Gas2.36
 2.76
Coal2.87
 2.93
Nuclear0.79
 0.80
Average cost of fuel, generated (in cents per net KWH)
2.20
 2.46
Average cost of purchased power (in cents per net KWH)(b)
5.01
 5.94
(a)Excludes Gulf Power, which was sold on January 1, 2019.
(b)Average cost of purchased power includes fuel purchased by the Southern Company system for tolling agreements where power is generated by the provider.
In 2019, total fuel and purchased power expenses were $4.4 billion, a decrease of $1.2 billion, or 20.9%, as compared to the prior year. Excluding approximately $511 million associated with the sale of Gulf Power, the decrease was primarily the result of a $575 million decrease in the average cost of fuel and purchased power and an $84 million net decrease in the volume of KWHs generated and purchased.
Fuel and purchased power energy transactions at the traditional electric operating companies are generally offset by fuel revenues and do not have a significant impact on net income. See FUTURE EARNINGS POTENTIAL – "Regulatory Matters" herein for additional information. Fuel expenses incurred under Southern Power's PPAs are generally the responsibility of the counterparties and do not significantly impact net income.
Fuel
In 2019, fuel expense was $3.6 billion, a decrease of $1.0 billion, or 21.9%, as compared to the prior year. Excluding approximately $309 million related to Gulf Power in 2018, the decrease was primarily due to an 18.1% decrease in the volume of KWHs generated by coal, a 14.5% decrease in the average cost of natural gas per KWH generated, and a 2.1% decrease in the average cost of coal per KWH generated, partially offset by a 5.0% increase in the volume of KWHs generated by natural gas.
Purchased Power
In 2019, purchased power expense was $816 million, a decrease of $155 million, or 16.0%, as compared to the prior year. Excluding approximately $202 million associated with the sale of Gulf Power, the change was primarily due to a 9.6% increase in the volume of KWHs purchased, partially offset by a 15.7% decrease in the average cost of KWH purchased.
Energy purchases will vary depending on demand for energy within the Southern Company system's electric service territory, the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, and the availability of the Southern Company system's generation.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $156 million, or 3.4%, in 2019 as compared to the prior year. The decrease reflects approximately $356 million related to Gulf Power in 2018 and $17 million related to the dispositions of Southern Power's Florida Plants and Plant Nacogdoches, partially offset by additional accruals of $123 million to the NDR at Alabama Power, $21 million of increased transmission and distribution expenses primarily due to overhead line maintenance and vegetation management at the traditional electric operating companies, $18 million from costs associated with unregulated sales at Georgia Power primarily associated with new energy conservation projects and power delivery construction and maintenance contracts, and $16 million related to an adjustment for FERC fees at Georgia Power following the conclusion of a multi-year audit of
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

headwater benefits associated with hydro facilities. See Notes 2 and 15 to the financial statements under "Alabama Power – Rate NDR" and "Southern PowerSales of Natural Gas and Biomass Plants," respectively, for additional information.
Depreciation and Amortization
Depreciation and amortization decreased $93 million, or 3.6%, in 2019 as compared to the prior year. The decrease was primarily due to a decrease of $191 million related to Gulf Power in 2018, partially offset by an increase in depreciation of $62 million primarily resulting from additional plant in service and an increase in the amortization of regulatory assets of $47 million primarily at Mississippi Power and Georgia Power. See Note 2 to the financial statements under "Southern CompanyRegulatory Assets and Liabilities" and Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
Taxes other than income taxes decreased $87 million, or 7.9%, in 2019 as compared to the prior year primarily due to a decrease of $118 million related to the sale of Gulf Power, partially offset by higher property taxes of $30 million primarily at Georgia Power.
Estimated Loss on Plants Under Construction
The $1.1 billion charge in 2018 reflects Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. The 2019 charges of $24 million were associated with abandonment and closure activities for the mine and gasifier-related assets of the Kemper IGCC at Mississippi Power, net of sales proceeds. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" and "Mississippi PowerKemper County Energy Facility" for additional information.
Impairment Charges
In the second quarter 2018, Southern Power recorded a $119 million asset impairment charge related to the sale of the Florida Plants and in the third quarter 2018 recorded a $36 million asset impairment charge on wind turbine equipment held for development projects. Asset impairment charges recorded in 2019 were immaterial. See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information.
(Gain) Loss on Dispositions, Net
Gain on dispositions, net increased $21 million in 2019 as compared to the prior year primarily due to Southern Power's sale of Plant Nacogdoches in the second quarter 2019. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized decreased $48 million, or 4.6%, in 2019 as compared to the prior year primarily related to the sale of Gulf Power.
Other Income (Expense), Net
Other income (expense), net increased $90 million, or 62.5%, in 2019 as compared to the prior year primarily due to a $36 million gain arising from the Roserock solar facility litigation settlement at Southern Power in 2019, $37 million from decreased charitable donations in 2019 at the traditional electric operating companies, $23 million of increased non-service cost-related retirement benefits income, and $16 million of increased interest income primarily associated with a new tolling arrangement accounted for as a sales-type lease at Mississippi Power as well as temporary cash investments, primarily at Alabama Power. These increases were partially offset by $24 million related to the settlement of Mississippi Power's Deepwater Horizon claim in 2018 and a $14 million gain from a joint-development wind project at Southern Power in 2018 attributable to its partner in the project. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and "Other Matters– Mississippi Power" and Note 11 to the financial statements under "Pension Plans" for additional information.
Income Taxes
Income taxes increased $501 million, or 242.0%, in 2019 as compared to the prior year. Excluding an income tax benefit of approximately $20 million related to Gulf Power in 2018, income taxes increased $481 million. The increase was primarily due to increases in pre-tax earnings, including the $1.1 billion charge in 2018 associated with Plant Vogtle Units 3 and 4 construction at Georgia Power. See Notes 10 and 15 to the financial statements for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Net Income Attributable to Noncontrolling Interests
Substantially all noncontrolling interests relate to renewable projects at Southern Power. Net income attributable to noncontrolling interests decreased $69 million, or 116.9%, in 2019, as compared to the prior year. The decrease was primarily due to $92 million of losses attributable to noncontrolling interests related to the tax equity partnerships entered into in 2018 and $14 million attributable to a joint-development wind project in 2018, partially offset by an allocation of approximately $29 million of income to the noncontrolling interest partner related to the Roserock solar facility litigation settlement. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and Note 7 to the financial statements under "Southern Power" for additional information regarding the litigation settlement and tax equity partnerships, respectively.
Gas Business
Southern Company Gas distributes natural gas through utilities in four states and is involved in several other complementary businesses including gas pipeline investments, wholesale gas services, and gas marketing services.
A condensed statement of income for the gas business follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$3,792
 $(117)
Cost of natural gas1,319
 (220)
Cost of other sales
 (12)
Other operations and maintenance888
 (93)
Depreciation and amortization487
 (13)
Taxes other than income taxes213
 2
Impairment charges115
 73
(Gain) loss on dispositions, net
 291
Total operating expenses3,022
 28
Operating income770
 (145)
Earnings from equity method investments157
 9
Interest expense, net of amounts capitalized232
 4
Other income (expense), net20
 19
Income taxes130
 (334)
Net income$585
 $213
The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for 2019 compared to 2018. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Company'sSouthern Company Gas Dispositions.
Seasonality of Results
During the period from November through March when natural gas usage and operating revenues are generally higher (Heating Season), more customers are connected to Southern Company Gas' distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively equally over any given year. Thus, operating results can vary significantly from quarter to quarter as a result of seasonality. For 2019, the percentage of operating revenues and net income generated during the Heating Season (January through March and November through December) were 68.7% and 86.8%, respectively. For 2018, the percentage of operating revenues and net income generated during the Heating Season were 68.7% and 96.0%, respectively.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues in 2019 were $3.8 billion, a $117 million decrease compared to 2018. Details of operating revenues were as follows:
 2019
 (in millions)
Operating revenues – prior year$3,909
Estimated change resulting from –
Infrastructure replacement programs and base rate changes96
Gas costs and other cost recovery(89)
Wholesale gas services150
Southern Company Gas Dispositions(*)
(300)
Other26
Operating revenues – current year$3,792
Percent change(3.0)%
(*)
Includes a $245 million decrease related to natural gas revenues, including alternative revenue programs, and a $55 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2019 compared to the prior year primarily due to increases of $74 million at Nicor Gas and $16 million at Atlanta Gas Light. These amounts include the natural gas distribution utilities' continued investments recovered through infrastructure replacement programs and base rate increases as well as customer refunds in 2018 as a result of the Tax Reform Legislation. See Note 2 to the financial performance.statements under "Southern Company Gas" for additional information.
Revenues attributable to gas costs and other cost recovery decreased in 2019 compared to the prior year primarily due to lower natural gas prices and decreased volumes of natural gas sold. Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities.
Revenues from wholesale gas services increased in 2019 primarily due to derivative gains, partially offset by decreased commercial activity.
Other natural gas revenues increased in 2019 primarily due to increases in customers at the natural gas distribution utilities and recovery of prior period hedge losses at gas marketing services.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, the natural gas distribution utilities charge their utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. The natural gas distribution utilities defer or accrue the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from the natural gas distribution utilities. Cost of natural gas at the natural gas distribution utilities represented 84.5% of the total cost of natural gas for 2019.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
In 2019, cost of natural gas was $1.3 billion, a decrease of $220 million, or 14.3%, compared to the prior year. Excluding a $106 million decrease related to the Southern Company Gas Dispositions, cost of natural gas decreased by $114 million, which reflects a 14.8% decrease in natural gas prices compared to 2018.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Cost of Other Sales
Cost of other sales related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $93 million, or 9.5%, in 2019 compared to the prior year. Excluding a $65 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses decreased $28 million. This decrease was primarily due to $28 million of disposition-related costs incurred during 2018, a $12 million adjustment in 2018 for the adoption of a new paid time off policy, an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions in 2018, and a $7 million decrease in compensation and benefits costs, partially offset by a $22 million increase in rider expenses, primarily at Nicor Gas, passed through directly to customers. See FUTURE EARNINGS POTENTIAL – "Southern Company GasUtility Regulation and Rate Design" herein for additional information.
Depreciation and Amortization
Depreciation and amortization decreased $13 million, or 2.6%, in 2019 compared to the prior year. Excluding a $27 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $14 million. This increase was primarily due to continued infrastructure investments at the natural gas distribution utilities, partially offset by accelerated depreciation related to assets retired in 2018. See Note 2 to the financial statements under "Southern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information.
Impairment Charges
In 2019, Southern Company Gas recorded impairment charges of $91 million related to a natural gas storage facility in Louisiana and $24 million in contemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. In 2018, a goodwill impairment charge of $42 million was recorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1, 3, and 15 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities," "Other MattersSouthern Company Gas," and "Southern Company Gas," respectively, for additional information.
(Gain) Loss on Dispositions, Net
Gain on dispositions, net was $291 million in 2018 and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
Earnings from equity method investments increased $9 million, or 6.1%, in 2019 compared to the prior year and reflect higher earnings from SNG as a result of rate increases that became effective September 2018, partially offset by a $6 million pre-tax loss on the sale of Triton in May 2019. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $19 million in 2019 compared to the prior year. This increase primarily resulted from a $23 million decrease in charitable donations in 2019.
Income Taxes
Income taxes decreased $334 million, or 72.0%, in 2019 compared to the prior year. This decrease primarily reflects a reduction of $348 million related to the Southern Company Gas Dispositions, as well as $29 million in benefits associated with impairment charges in 2019 and additional benefits from the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light as previously authorized by the Georgia PSC, partially offset by $48 million of additional taxes associated with increased pre-tax earnings at wholesale gas services.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information. Also see Notes 2, 3, and 15 to the financial statements under "Southern Company Gas," "Other MattersSouthern Company Gas," and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on Atlanta Gas Light's regulatory treatment of the impacts of the Tax Reform Legislation and the impairment charges.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Other Business Activities
Southern Company's other business activities primarily include the parent company (which does not allocate operating expenses to business units); PowerSecure, a provider of energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency; Southern Holdings, which invests in various projects, including leveraged lease projects; and Southern Linc, which provides digital wireless communications for use by the Southern Company system and also markets these services to the public and provides fiber optics services within the Southeast.
A condensed statement of income for Southern Company's other business activities follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$532
 $(483)
Cost of other sales359
 (369)
Other operations and maintenance233
 (40)
Depreciation and amortization79
 13
Taxes other than income taxes6
 
Impairment charges50
 38
(Gain) loss on dispositions, net(2,548) (2,548)
Total operating expenses(1,821) (2,906)
Operating income (loss)2,353
 2,423
Interest expense517
 (62)
Other income (expense), net10
 33
Income taxes (benefit)960
 1,182
Net income (loss)$886
 $1,336
Operating Revenues
Southern Company's operating revenues for these other business activities decreased $483 million, or 47.6%, in 2019 as compared to the prior year primarily related to PowerSecure's 2018 storm restoration services in Puerto Rico and the sale of PowerSecure's utility infrastructure services business in June 2019.
Cost of Other Sales
Cost of other sales for these other business activities decreased $369 million, or 50.7%, in 2019 as compared to the prior year primarily related to PowerSecure's 2018 storm restoration services in Puerto Rico and the sale of PowerSecure's utility infrastructure services business in June 2019.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses for these other business activities decreased $40 million, or 14.7%, in 2019 as compared to the prior year. The Company's 2016decrease was primarily due to PowerSecure's lower employee compensation and benefits in 2019 and 2018 storm restoration services in Puerto Rico.
Impairment Charges
In 2019, goodwill and asset impairment charges totaling $50 million were recorded related to the sale of PowerSecure's utility infrastructure services and lighting businesses. In 2018, asset impairment charges of $12 million associated with Southern Linc's tower leases were recorded in contemplation of the sale of Gulf Power.
(Gain) Loss on Dispositions, Net
The 2019 gain on dispositions, net primarily relates to the gain of $2.6 billion ($1.4 billion after tax) on the sale of Gulf Power. See Note 15 to the financial statements under "Southern Company" for additional information.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Interest Expense
Interest expense for these other business activities decreased $62 million, or 10.7%, in 2019 as compared to the prior year primarily due to a decrease in average outstanding long-term debt at the parent company. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net for these other business activities increased $33 million in 2019 as compared to the prior year primarily due to a $43 million decrease in charitable donations at the parent company, partially offset by a $17 million impairment charge associated with a leveraged lease at Southern Holdings in 2019. See Notes 1 and 3 to the financial statements under "Leveraged Leases" and "Other MattersSouthern Company," respectively, for additional information.
Income Taxes (Benefit)
The income tax for these other business activities increased $1.2 billion in 2019 as compared to the prior year primarily due to the tax impacts related to the sale of Gulf Power. See Note 10 to the financial statements and Note 15 to the financial statements under "Southern Company" for additional information.
Alabama Power
Alabama Power's 2019 net income after dividends on preferred and preference stock was $822 million,$1.07 billion, representing a $37$140 million, or 4.7%15.1%, increase over the previous year. The increase was primarily due primarily to an increase in retail revenues underassociated with the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and a lower Rate RSE customer refund in 2019 as compared to the prior year, as well as additional capital investments recovered through Rate CNP Compliance, anCompliance. The increase in weather-related revenues, and a decreaserevenue is partially offset by increases in operations and maintenance and depreciation expenses not related to fuel or Rate CNP Compliance. These increases to income were partially offset by an accrual for an expected Rate RSE refund, a decrease in AFUDC equity, and an increase in depreciation.lower customer usage. See FUTURE EARNINGS POTENTIAL – "Retail "Regulatory MattersAlabama PowerRate RSE" and " – Rate RSE"CNP Compliance" herein for additional information.
The Company's 2015 net income after dividends on preferred and preference stock was $785 million, representing a $24 million, or 3.2%, increase over the previous year. The increase was due primarily to an increase in rates under Rate RSE effective January 1, 2015. This increase was partially offset by a decrease in weather-related revenues resulting from milder weather experienced in 2015 as compared to 2014 and an increase in amortization.
Table of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

RESULTS OF OPERATIONS
A condensed income statement for the CompanyAlabama Power follows:
Amount 
Increase (Decrease)
from Prior Year
2016 2016 20152019 Increase
(Decrease)
from 2018
(in millions)(in millions)
Operating revenues$5,889
 $121
 $(174)$6,125
 $93
Fuel1,297
 (45) (263)1,112
 (189)
Purchased power334
 (17) (34)403
 (29)
Other operations and maintenance1,510
 9
 33
1,821
 152
Depreciation and amortization703
 60
 40
793
 29
Taxes other than income taxes380
 12
 12
403
 14
Total operating expenses4,224
 19
 (212)4,532
 (23)
Operating income1,665
 102
 38
1,593
 116
Allowance for equity funds used during construction28
 (32) 11
52
 (10)
Interest income16
 1
 
Interest expense, net of amounts capitalized302
 28
 19
336
 13
Other income (expense), net(37) 10
 (25)46
 26
Income taxes531
 25
 (6)270
 (21)
Net income839
 28
 11
1,085
 140
Dividends on preferred and preference stock17
 (9) (13)15
 
Net income after dividends on preferred and preference stock$822
 $37
 $24
$1,070
 $140
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 20162019 were $5.9$6.1 billion, reflecting a $121 million$0.1 billion increase from 2015.2018. Details of operating revenues were as follows:
Amount
2016 20152019 2018
(in millions)(in millions)
Retail — prior year$5,234
 $5,249
$5,367
  
Estimated change resulting from —      
Rates and pricing147
 204
347
  
Sales decline(20) (11)(79)  
Weather31
 (43)(3)  
Fuel and other cost recovery(70) (165)(131)  
Retail — current year5,322
 5,234
5,501
 $5,367
Wholesale revenues —      
Non-affiliates283
 241
258
 279
Affiliates69
 84
81
 119
Total wholesale revenues352
 325
339
 398
Other operating revenues215
 209
285
 267
Total operating revenues$5,889
 $5,768
$6,125
 $6,032
Percent change2.1% (2.9)%1.5% (0.1)%
Retail revenues in 20162019 were $5.3$5.5 billion. These revenues increased $88$134 million, or 1.7%2.5%, in 2016 and decreased $15 million, or 0.3%, in 2015, each2019 as compared to the prior year. The increase in 20162019 was primarily due to an increaseincreases in revenues underrates and pricing associated with the impact of customer bill credits issued in 2018 related to the Tax Reform Legislation and additional capital investments recovered through Rate CNP
Table of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

Compliance, as well as a result of increased net investments,lower Rate RSE customer refund in 2019 as compared to the prior year, partially offset by a decreasedecreases in fuel revenues and an accrual for an expected Rate RSE refund. The decrease in 2015 was due to a decrease in fuel revenues andcustomer usage, as well as milder weather in 20152019 as compared to 2014, partially offset by an increase in revenues due to a Rate RSE increase effective January 1, 2015. 2018.
See Note 32 to the financial statements under "Retail Regulatory Matters"Alabama PowerRate RSE" and " – Rate RSE"CNP Compliance" for additional information. See "Energy Sales""Energy Sales" herein for a discussion of changes in the volume of energy sold, including changes related to sales growthdecline and weather.
FuelElectric rates billedinclude provisions to customers are designed to fully recover fluctuatingrecognize the recovery of fuel andcosts, purchased power costs, over a period of time. FuelPPAs certificated by the Alabama PSC, and costs associated with the natural disaster reserve. Under these provisions, fuel and other cost recovery revenues generally have no effect on net income because they represent the recording of revenues to offsetequal fuel and purchased power expenses.other cost recovery expenses and do not affect net income. See Note 3 to the financial statements under "Retail FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerRate ECR"ECR" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
2016 2015 20142019 2018
(in millions)(in millions)
Capacity and other$154
 $140
 $154
$102
 $101
Energy129
 101
 127
156
 178
Total non-affiliated$283
 $241
 $281
$258
 $279
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of the Company'sAlabama Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not affect net income. Short-term opportunity energy sales are also included in wholesale energy sales to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above the Company'sAlabama Power's variable cost to produce the energy.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In 2016,2019, wholesale revenues from sales to non-affiliates increased $42decreased $21 million, or 17.4%7.5%, as compared to the prior year primarily due toas a $28 million increase in revenues from energy sales and a $14 million increase in capacity revenues. In 2016, KWH sales increased 33.3% primarily due to a new wholesale contract in the first quarter 2016 partially offset by a 12.1%result of an 8.2% decrease in the price of energy prices due to lower natural gas prices. In 2015, wholesale revenues from sales to non-affiliates decreased $40 million, or 14.2%, as compared to the prior year. This decrease reflectsprices, partially offset by a $26 million decrease in revenues from energy sales and a $14 million decrease in capacity revenues. In 2015, KWH sales decreased 6.3% primarily due to the market availability of lower cost natural gas resources and an 8.4% decrease1% increase in the priceamount of energy due to lower natural gas prices.KWHs sold.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales and purchases are made in accordance with the Intercompany Interchange Contract (IIC),IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost and energy purchases are generally offset by energy revenues through the Company'sAlabama Power's energy cost recovery clause.
In 2016,2019, wholesale revenues from sales to affiliates decreased $15$38 million, or 17.9%31.9%, as compared to the prior year. In 2016,2019, KWH sales decreased 15.7% as a result22.7% due to the decreased availability of lower-costcoal generation available inassociated with the Southern Company systemretirement of Plant Gorgas Units 8, 9, and a 2.6% decrease in10, and the price of energy primarily due to lower natural gas prices. In 2015, wholesale revenues from sales to affiliates decreased $105 million, or 55.6%, as compared to the prior year. In 2015, KWH sales decreased 33.9%11.8% as a result of lower-cost generation available in the Southern Company system and a 32.8% decrease in the price of energy primarily due to lower natural gas prices.
In 2015,2019, other operating revenues decreased $14increased $18 million, or 6.3%6.7%, as compared to the prior year primarily due to decreases in co-generation steam revenues due to lower natural gas prices and transmission revenues related to the open access transmission tariff, partially offset by an increase in transmission service agreement revenues.
Tableunregulated sales of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

products and services and pole attachment agreements.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 20162019 and the percent change from the prior year were as follows:
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
2019
2016 2016 2015 2016 2015
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
(in billions)        (in billions)    
Residential18.4
 1.4% (3.4)% (0.5)% 0.1 %18.3
 (1.9)% (1.5)%
Commercial14.1
 (0.1) (0.1) (0.5) 0.1
13.6
 (2.2) (2.2)
Industrial22.3
 (4.6) (1.8) (4.6) (1.8)22.1
 (3.7) (3.7)
Other0.2
 3.8
 (4.9) 3.8
 (4.9)0.2
 (7.3) (7.3)
Total retail55.0
 (1.5) (1.9) (2.2)% (0.7)%54.2
 (2.8) (2.6)%
Wholesale              
Non-affiliates5.9
 37.1
 (6.3)    5.1
 1.2
  
Affiliates3.2
 (15.7) (33.8)    3.5
 (22.7)  
Total wholesale9.1
 12.5
 (21.5)    8.6
 (10.1)  
Total energy sales64.1
 0.3% (4.9)%    62.8
 (3.8)%  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales in 2016 were 1.5% lower than in 2015. Residential sales increased 1.4%2019 decreased 2.8% primarily due to warmer weather in the third quarter 2016 as compared to the corresponding period in 2015. Commercial sales remained flat in 2016. Weather-adjusted residential sales were flat in 2016 due to lower customer usage and milder weather in 2019 compared to 2018. Weather-adjusted residential sales were 1.5% lower in 2019 primarily due to lower customer usage resulting from an increase in efficiency improvements inpenetration of energy-efficient residential appliances, partially offset by customer growth. Weather-adjusted commercial sales were 2.2% lower in 2019 primarily due to lower customer usage resulting from customer initiatives in energy savings and lighting,an ongoing migration to the electronic commerce business model, partially offset by customer growth. Industrial sales decreased 4.6%3.7% in 20162019 as compared to 20152018 primarily as a result of a decrease in demand resulting from changes in production levels primarily in the primary metals chemical, pipelines, paper, and stone, clay, and glasschemicals sectors. A strong dollar, low oil prices, and weak global growth conditions constrained growth in the industrial sector in 2016.
Retail energy sales in 2015 were 1.9% lower than in 2014. Residential and commercial sales decreased 3.4% and 0.1%, respectively, due primarily to milder weather in 2015 as compared to 2014. Weather-adjusted residential and commercial sales were flat in 2015. Industrial sales decreased 1.8% in 2015 compared to 2014 as a result of a decrease in demand resulting from changes in production levels primarily in the primary metals sector. A strong dollar, low oil prices, and weak global growth conditions constrained growth in the industrial sector in 2015.
See "Operating Revenues""Operating Revenues" above for a discussion of significant changes in wholesale revenues from sales to non-affiliates and wholesale revenues from sales to affiliated companies as related to changes in price and KWH sales.
Fuel and Purchased Power Expenses
Fuel costs constitute one of the largest expenses for the Company. The mix of fuel sources for generation of electricity is determined primarily by the unit cost of fuel consumed, demand, and the availability of generating units. Additionally, the CompanyAlabama Power purchases a portion of its electricity needs from the wholesale market.
Table of ContentsIndex to Financial Statements


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Details of the Company'sAlabama Power's generation and purchased power were as follows:
 2016 2015 2014
Total generation (in billions of KWHs)
60.2
 60.9
 63.6
Total purchased power (in billions of KWHs)
7.1
 6.3
 6.6
Sources of generation (percent) —
     
Coal53
 54
 54
Nuclear23
 24
 23
Gas19
 16
 17
Hydro5
 6
 6
Cost of fuel, generated (in cents per net KWH) —
     
Coal2.75
 2.83
 3.14
Nuclear0.78
 0.81
 0.84
Gas2.67
 2.94
 3.69
Average cost of fuel, generated (in cents per net KWH)(a)
2.26
 2.34
 2.68
Average cost of purchased power (in cents per net KWH)(b)
4.80
 5.66
 5.92
 2019 2018
Total generation (in billions of KWHs)
56.9
 60.5
Total purchased power (in billions of KWHs)
9.4
 8.1
Sources of generation (percent) —
   
Coal45
 50
Nuclear25
 23
Gas21
 19
Hydro9
 8
Cost of fuel, generated (in cents per net KWH) —
   
Coal2.69
 2.73
Nuclear0.77
 0.77
Gas2.47
 2.84
Average cost of fuel, generated (in cents per net KWH)(a)(b)
2.11
 2.26
Average cost of purchased power (in cents per net KWH)(c)
4.39
 5.47
(a)
For 2018, cost of fuel, generated and average cost of fuel, generated excludes a $30 million adjustment associated with a May 2018 Alabama PSC accounting order related to excess deferred income taxes. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerTax Reform Accounting Order" herein for additional information.
(b)KWHs generated by hydro are excluded from the average cost of fuel, generated.
(b)
(c)Average cost of purchased power includes fuel, energy, and transmission purchased by the CompanyAlabama Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $1.6$1.5 billion in 2016,2019, a decrease of $62$218 million, or 3.7%12.6%, compared to 2015.2018. The decrease was primarily due to a $61$102 million decrease in the average cost of purchased power, and a $59 million decrease in the average cost of fuel, partially offset by a $49 million increase related to the volume of KWHs purchased.
Fuel and purchased power expenses were $1.7 billion in 2015, a decrease of $297 million, or 14.9%, compared to 2014. The decrease was primarily due to a $184$56 million decrease in the average cost of fuel, a $79$30 million decrease in the volume of KWHs generated, an $18 millionnet decrease related to the volume of KWHs purchased and generated, and a $16$30 million decrease in fuel expense associated with the average cost of purchased power.May 2018 Alabama PSC accounting order.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through the Company'sAlabama Power's energy cost recovery clause. The Company,Alabama Power, along with the Alabama PSC, continuously monitors the under/over recovered balance to determine whether adjustments to billing rates are required. See Note 32 to the financial statements under "Retail Regulatory Matters"Alabama PowerRate ECR"ECR" for additional information.
Fuel
Fuel expenses were $1.3$1.1 billion in 2016,2019, a decrease of $45$189 million, or 3.4%14.5%, compared to 2015.2018. The decrease was primarily due to a 9.2%13% decrease in the average cost of KWHs generated by natural gas, which excludes tolling agreements, a 4.2% and 3.9%14.4% decrease in the volume of KWHs generated by nuclear fuel and coal, respectively, and a 3.7% decrease in the average cost of KWHs generated by nuclear fuel, partially offset by a 17.4%5.2% increase in the volume of KWHs generated by natural gas. Fuel expenses were $1.3 billionhydro, as well as a $30 million decrease in 2015,fuel expense associated with the May 2018 Alabama PSC accounting order.
Purchased Power Non-Affiliates
Purchased power expense from non-affiliates was $203 million in 2019, a decrease of $263$13 million, or 16.4%6.0%, compared to 2014. The2018. This decrease was primarily due to a 20.4% decrease in the average cost of KWHs generated by natural gas, which excludes tolling agreements, a 9.9% decrease in the average cost of KWHs generated by coal, an 8.5% decrease in the volume of KWHs generated by natural gas, and a 4.0% decrease in the volume of KWHs generated by coal.
Purchased Power Non-Affiliates
In 2016, purchased power expense from non-affiliates was $166 million, a decrease of $5 million, or 2.9%, compared to 2015. This decrease is immaterial. In 2015, purchased power expense from non-affiliates was $171 million, a decrease of $14 million, or 7.6%, compared to 2014. The decrease was primarily due to a 19.5%12.6% decrease in the average cost per KWH purchased primarily due to lower natural gas pricesprices. The decrease was partially offset by a 15.2%9.1% increase in the amount of energy purchased as a result of decreased coal generation due to the market availabilityretirement of lower-cost generation.Plant Gorgas Units 8, 9, and 10.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Table of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

Purchased Power Affiliates
Purchased power expense from affiliates was $168$200 million in 2016,2019, a decrease of $12$16 million, or 6.7%7.4%, compared to 2015.2018. This decrease was primarily due to a 20.7%25.2% decrease in the average cost per KWH purchased due to lower natural gas prices,prices. The decrease was partially offset by a 17.5%24.1% increase in the amount of energy purchased primarily due to the availability of lower-cost
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

generation compared to the Company'sAlabama Power's owned generation. Purchased power expense from affiliates was $180 million in 2015,generation and a decrease of $20 million, or 10.0%, compared to 2014. This decrease was primarilyin coal generation due to a 16.9% decrease in the amountretirement of energy purchased due to milder weather in 2015 as compared to 2014, partially offset by an 8.3% increase in the average cost per KWH purchased related to steam support at Plant Gaston.Gorgas Units 8, 9, and 10.
Energy purchases from affiliates will vary depending on demand for energy and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
In 2016,2019, other operations and maintenance expenses increased $9$152 million, or 0.6%9.1%, as compared to the prior year. Steam production costs increased $28 million primarily due to the timing of generation operating expenses. Transmission and distribution expenses increased $10 million and $7 million, respectively, primarily due to additional vegetation management and other maintenance expenses. These increases were partially offset by a decrease of $32 million in employee benefit costs, including pension costs. The increases in operations and maintenance expenses were primarily Rate CNP compliance-related costs and therefore had no significant impact to net income. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate CNP Compliance" herein for additional information.
In 2015, other operations and maintenance expenses increased $33 million, or 2.2%, as compared to the prior year. Employee benefit costs, including pension costs, increased $40 million. Nuclear production expenses increased $19 million primarily due to outage amortization costs. These increases were partially offset by decreases in steam production expenses of $21 million primarily due to the timing of outages and distribution expenses of $12 million primarily related to overhead line maintenance expenses.
See Note 2 to the financial statements under "Pension Plans" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $60 million, or 9.3%, in 2016 as compared to the prior year primarily due to compliance related steam projects placedadditional accruals of $123 million to the NDR as well as $11 million in service. Rate CNP Compliance-related expenses. See Note 2 to the financial statements under "Alabama Power – Rate NDR" and " – Rate CNP Compliance" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $40$29 million, or 6.6%3.8%, in 20152019 as compared to the prior year primarily due to additional plant in service. See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Other Income (Expense), Net
Other income (expense), net increased $26 million, or 130.0%, in 2019 as compared to the prior year primarily due to a decrease of $17 million in charitable donations and an increase of $9 million in interest income from temporary cash investments.
Income Taxes
Income taxes decreased $21 million, or 7.2%, in 2019 as compared to the prior year primarily due to additional benefits from the flowback of excess deferred income taxes in accordance with an Alabama PSC accounting order, partially offset by an increase in pre-tax net income. See Note 2 to the financial statements under "Alabama Power – Tax Reform Accounting Order" for additional information.
Georgia Power
Georgia Power's 2019 net income was $1.7 billion, representing a $927 million, or 116.9%, increase from the previous year. The increase was primarily due to a $1.1 billion ($0.8 billion after tax) charge in the second quarter 2018 for an estimated probable loss related to Georgia Power's construction of Plant Vogtle Units 3 and 4, an increase in retail base revenues associated with higher contributions from commercial and industrial customers with variable demand-driven pricing, and an increase in other revenues primarily related to unregulated sales. Partially offsetting the increase were higher non-fuel operations and maintenance expenses and depreciation and amortization.
A condensed income statement for Georgia Power follows:
 2019 
Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$8,408
 $(12)
Fuel1,444
 (254)
Purchased power1,096
 (57)
Other operations and maintenance1,972
 112
Depreciation and amortization981
 58
Taxes other than income taxes454
 17
Estimated loss on Plant Vogtle Units 3 and 4
 (1,060)
Total operating expenses5,947
 (1,184)
Operating income2,461
 1,172
Interest expense, net of amounts capitalized409
 12
Other income (expense), net140
 25
Income taxes472
 258
Net income$1,720
 $927
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were $8.4 billion, a $12 million decrease from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$7,752
  
Estimated change resulting from —   
Rates and pricing202
  
Sales decline(66)  
Weather39
  
Fuel cost recovery(220)  
Retail — current year7,707
 $7,752
Wholesale revenues —   
Non-affiliates129
 163
Affiliates11
 24
Total wholesale revenues140
 187
Other operating revenues561
 481
Total operating revenues$8,408
 $8,420
Percent change(0.1)% 1.3%
Retail revenues of $7.7 billion in 2019 decreased $45 million, or 0.6%, compared to 2018. The significant factors driving this change are shown in the preceding table. The increase in rates and pricing was primarily due to higher contributions from commercial and industrial customers with variable demand-driven pricing, an increase in the NCCR tariff effective January 1, 2019, and pricing effects associated with a milder winter in 2019 compared to 2018. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information related to the NCCR tariff.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to the sales decline in 2019.
Electric rates include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these fuel cost recovery provisions, fuel revenues generally equal fuel expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerFuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2019 2018
 (in millions)
Capacity and other$55
 $54
Energy74
 109
Total non-affiliated$129
 $163
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amounts billable under the contract terms and provide for recovery of fixed costs and a return on investment. Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Georgia Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Short-term opportunity sales are made at market-based rates that generally provide a margin above Georgia Power's variable cost of energy.
Wholesale revenues from non-affiliated sales decreased $34 million, or 20.9%, in 2019 as compared to 2018 primarily due to lower energy prices and lower demand.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost. In 2019, wholesale revenues from sales to affiliates decreased $13 million, or 54.2%, as compared to 2018 primarily due to a 36.3% decrease in KWH sales as a result of the lower market cost of available energy compared to the cost of Georgia Power-owned generation.
Other operating revenues increased $80 million, or 16.6%, in 2019 from the prior year primarily due to revenue increases of $27 million from power delivery construction and maintenance contracts, $20 million from unregulated sales associated with new energy conservation projects, $11 million from outdoor lighting LED conversions and sales, $7 million from OATT sales, and $6 million in wholesale operating fees associated with contractual targets.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 (in billions)    
Residential28.2
 (0.5)% (0.4)%
Commercial32.8
 (0.4) (1.3)
Industrial23.2
 (2.1) (2.2)
Other0.5
 (5.6) (5.5)
Total retail84.7
 (0.9) (1.2)%
Wholesale     
Non-affiliates2.7
 (15.8)  
Affiliates0.3
 (36.3)  
Total wholesale3.0
 (18.7)  
Total energy sales87.7
 (1.7)%  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers.
In 2019, weather-adjusted residential and commercial KWH sales decreased 0.4% and 1.3%, respectively, compared to 2018 primarily due to a decline in average customer usage resulting from an increase in energy saving initiatives. The decreases in weather-adjusted residential and commercial KWH sales were largely and partially, respectively, offset by customer growth. Weather-adjusted industrial KWH sales decreased 2.2% primarily due to decreases in the paper, textile, stone, clay, and glass, and lumber sectors, partially offset by an increase in the pipeline sector.
See "Operating Revenues" above for a discussion of significant changes in wholesale sales to non-affiliates and affiliated companies.
Fuel and Purchased Power Expenses
Fuel costs constitute one of the largest expenses for Georgia Power. The mix of fuel sources for the generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Georgia Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Georgia Power's generation and purchased power were as follows:
 2019 2018
Total generation (in billions of KWHs)
62.6
 65.2
Total purchased power (in billions of KWHs)
29.1
 27.9
Sources of generation (percent) —
   
Gas47
 42
Nuclear26
 25
Coal24
 30
Hydro3
 3
Cost of fuel, generated (in cents per net KWH) 
   
Gas2.42
 2.75
Nuclear0.81
 0.82
Coal3.09
 3.21
Average cost of fuel, generated (in cents per net KWH)
2.16
 2.40
Average cost of purchased power (in cents per net KWH)(*)
4.21
 4.79
(*) Average cost of purchased power includes fuel purchased by Georgia Power for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $2.5 billion in 2019, a decrease of $311 million, or 10.9%, compared to 2018. The decrease was primarily due to a $289 million decrease related to the average cost of fuel and purchased power.
Fuel and purchased power energy transactions do not have a significant impact on earnings since these fuel expenses are generally offset by fuel revenues through Georgia Power's fuel cost recovery mechanism. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerFuel Cost Recovery" herein for additional information.
Fuel
Fuel expense was $1.4 billion in 2019, a decrease of $254 million, or 15.0%, compared to 2018. The decrease was primarily due to a 10% decrease in the average cost of fuel, primarily related to lower natural gas prices, and a 3.9% decrease in the volume of KWHs generated, primarily due to the lower market cost of energy compared to available Georgia Power resources.
Purchased Power - Non-Affiliates
Purchased power expense from non-affiliates was $521 million in 2019, an increase of $91 million, or 21.2%, compared to 2018. The increase was primarily due to a 53.1% increase in the volume of KWHs purchased primarily due to the lower market cost of energy compared to available Southern Company system resources and warmer weather in the third quarter 2019 resulting in higher customer demand, partially offset by a 22.1% decrease in the average cost per KWH purchased primarily due to lower energy prices.
The volume increase also reflects purchases from Gulf Power which were classified as affiliate prior to January 1, 2019. See Note 15 to the financial statements for information regarding the sale of Gulf Power.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Purchased Power - Affiliates
Purchased power expense from affiliates was $575 million in 2019, a decrease of $148 million, or 20.5%, compared to 2018. The decrease was primarily due to an 11.1% decrease in the volume of KWHs purchased as Georgia Power units generally dispatched at a lower cost than other Southern Company system resources and a 13.0% decrease in the average cost per KWH purchased resulting from lower energy prices.
The decrease in purchased power expense from affiliates also reflects a change in the classification of capacity expenses of $24 million related to PPAs with Southern Power accounted for as finance leases following the adoption of FASB ASC Topic 842, Leases (ASC 842). In 2019, these expenses are included in depreciation and amortization and interest expense, net of amounts capitalized. The decrease in the volume of KWHs purchased also includes the effect of classifying purchases from Gulf Power as
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

non-affiliate beginning January 1, 2019. See Notes 9 and 15 to the financial statements for additional information regarding ASC 842 and the sale of Gulf Power, respectively.
Energy purchases from affiliates will vary depending on the demand and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, all as approved by the FERC.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses increased $112 million, or 6.0%, compared to 2018. The increase reflects increases in expenses of $30 million from unregulated sales primarily associated with new energy conservation projects and power delivery construction and maintenance contracts, $26 million related to scheduled generation outages, $16 million related to an adjustment for FERC fees following the conclusion of a multi-year audit of headwater benefits associated with hydro facilities, $12 million primarily due to the timing of vegetation management and other transmission-related expenses, and $10 million associated with generation maintenance.
Depreciation and Amortization
Depreciation and amortization increased $58 million, or 6.3%, in 2019 compared to 2018. The increase was primarily due to a $31 million increase in depreciation associated with additional plant in service and a $19 million increase in the amortization of regulatory assets related to the retirement of certain generating units. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerIntegrated Resource Plan" herein for additional information on unit retirements.
The increase also reflects the classification of approximately $9 million related to PPAs with Southern Power accounted for as finance leases following the adoption of ASC 842. In prior periods, the expenses related to these PPAs were included in purchased power, affiliates. See Note 9 to the financial statements for additional information regarding ASC 842.
See Note 5 to the financial statements under "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
In 2019, taxes other than income taxes increased $17 million, or 3.9%, compared to 2018 primarily due to higher property taxes of $25 million as a result of increases in the assessed value of property, partially offset by a decrease of $11 million in municipal franchise fees, largely due to adjustments associated with the Georgia Power Tax Reform Settlement Agreement. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerRate Plans – Tax Reform Settlement Agreement" herein for additional information.
Estimated Loss on Plant Vogtle Units 3 and 4
In the second quarter 2018, an estimated probable loss of $1.1 billion was recorded to reflect Georgia Power's revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See ACCOUNTING POLICIES – "Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4" herein and Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2019, interest expense, net of amounts capitalized increased $12 million, or 3.0%, compared to 2018. The increase was primarily due to the reclassification of $15 million related to PPAs with Southern Power accounted for as finance leases following the adoption of ASC 842 and a $6 million increase in interest expense associated with an increase in outstanding short-term borrowings, partially offset by a $9 million increase in amounts capitalized largely associated with Plant Vogtle Units 3 and 4.
In prior periods, the expenses related to the PPAs with Southern Power were included in purchased power, affiliates. See FINANCIAL CONDITION AND LIQUIDITY – "Sources of Capital" and "Financing Activities" herein for additional information on borrowings, Note 9 to the financial statements for additional information regarding ASC 842, and Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
Other Income (Expense), Net
In 2019, other income (expense), net increased $25 million compared to the prior year primarily due to a $16 million increase in non-service cost-related retirement benefits income and a $13 million decrease in charitable donations, partially offset by a $4 million decrease in interest income from temporary cash investments. See Note 11 to the financial statements for additional information on Georgia Power's net periodic pension and other postretirement benefit costs.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Income Taxes
Income taxes increased $258 million, or 120.6%, in 2019 compared to the prior year primarily as a result of higher pre-tax earnings largely due to the 2018 charge associated with Plant Vogtle Units 3 and 4 construction. This increase was partially offset by additional state ITCs recognized in 2019 and the recognition of a valuation allowance in 2018. See Note 10 to the financial statements for additional information.
Mississippi Power
Mississippi Power's net income after dividends on preferred stock was $139 million in 2019 compared to $235 million in 2018. The change was primarily the result of higher income tax expense following the 2018 partial reversal of a valuation allowance.
A condensed statement of operations follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$1,264
 $(1)
Fuel407
 2
Purchased power20
 (21)
Other operations and maintenance283
 (30)
Depreciation and amortization192
 23
Taxes other than income taxes113
 6
Estimated loss on Kemper IGCC24
 (13)
Total operating expenses1,039
 (33)
Operating income225
 32
Allowance for equity funds used during construction1
 1
Interest expense, net of amounts capitalized69
 (7)
Other income (expense), net12
 (5)
Income taxes (benefit)30
 132
Net income139
 (97)
Dividends on preferred stock
 (1)
Net income after dividends on preferred stock$139
 $(96)
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues for 2019 were approximately $1.3 billion, a $1 million decrease from 2018. Details of operating revenues were as follows:
 2019 2018
 (in millions)
Retail — prior year$889
  
Estimated change resulting from —   
Rates and pricing31
  
Weather(2)  
Fuel and other cost recovery(41)  
Retail — current year877
 $889
Wholesale revenues —   
Non-affiliates237
 263
Affiliates132
 91
Total wholesale revenues369
 354
Other operating revenues18
 22
Total operating revenues$1,264
 $1,265
Percent change(0.1)% 6.6%
Total retail revenues for 2019 decreased $12 million, or 1.3%, compared to 2018 primarily due to a fuel rate decrease that became effective for the first billing cycle of February 2019. This decrease was largely offset by an increase in rates and pricing, primarily related to PEP and ECO Plan rate changes that became effective for the first billing cycle of September 2018, net of a new tolling arrangement accounted for as a sales-type lease effective January 2019. See Note 2 to the financial statements under "Mississippi PowerEnvironmental Compliance Overview Plan" and " – Performance Evaluation Plan" and Note 9 to the financial statements under "Lessor" for additional information.
See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales and weather.
Electric rates for Mississippi Power include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of purchased power costs, and do not affect net income. Recoverable fuel costs include fuel and purchased power expenses reduced by the fuel and emissions portion of wholesale revenues from energy sold to customers outside Mississippi Power's service territory. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersMississippi PowerFuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities, including FERC-regulated MRA sales as well as market-based sales, were as follows:
 2019 2018
 (in millions)
Capacity and other$3
 $6
Energy234
 257
Total non-affiliated$237
 $263
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of Mississippi Power's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. In addition, Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers. Short-term opportunity energy sales are also included in sales for resale to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above Mississippi Power's variable cost to produce the energy.
Wholesale revenues from sales to non-affiliates decreased $26 million, or 9.9%, compared to 2018. This decrease primarily reflects decreases of $14 million from lower fuel prices, $6 million from decreased customer usage, and $8 million from lower PPA capacity and energy sales.
Wholesale revenues from sales to affiliates will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the IIC, as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost.
Wholesale revenues from sales to affiliates increased $41 million, or 45.1%, in 2019 compared to 2018. This increase was primarily due to a $76 million increase associated with higher KWH sales due to the dispatch of Mississippi Power's lower cost generation resources to serve the Southern Company system's territorial load, partially offset by a $35 million decrease associated with lower natural gas prices.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2019 and the percent change from the prior year were as follows:
 2019
 
Total
KWHs
 
Total KWH
Percent Change
 Weather-Adjusted Percent Change
 (in millions)    
Residential2,062
 (2.4)% (0.8)%
Commercial2,715
 (2.9) (2.7)
Industrial4,795
 (2.6) (2.6)
Other36
 (1.9) (1.9)
Total retail9,608
 (2.7) (2.2)%
Wholesale     
Non-affiliated3,966
 (0.3)  
Affiliated4,758
 84.1
  
Total wholesale8,724
 32.9
  
Total energy sales18,332
 11.5 %  
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales decreased 2.7% in 2019 as compared to the prior year, primarily due to decreased demand by several large industrial customers. Weather-adjusted residential and commercial KWH sales decreased 0.8% and 2.7%, respectively, in 2019 primarily due to decreased customer usage as a result of an increase in energy saving initiatives, slightly offset by customer growth.
See "Operating Revenues" above for a discussion of significant changes in wholesale revenues to affiliated companies.
Fuel and Purchased Power Expenses
The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, Mississippi Power purchases a portion of its electricity needs from the wholesale market.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Mississippi Power's generation and purchased power were as follows:
 2019 2018
Total generation (in millions of KWHs)
18,269
 15,966
Total purchased power (in millions of KWHs)
529
 960
Sources of generation (percent) –
   
Gas94
 93
Coal6
 7
Cost of fuel, generated (in cents per net KWH) –
   
Gas2.26
 2.65
Coal4.05
 3.50
Average cost of fuel, generated (in cents per net KWH)
2.37
 2.72
Average cost of purchased power (in cents per net KWH)
3.71
 4.27
Fuel and purchased power expenses were $427 million in 2019, a decrease of $19 million, or 4.3%, as compared to the prior year. The increasedecrease was primarily due to a $60 million decrease related to the amortization of $120 million of a regulatory liability for otheraverage cost of removal obligations in 2014,fuel and purchased power primarily due to the lower average cost of natural gas, partially offset by decreasesa $41 million net increase associated with the volume of KWHs generated and purchased primarily due to lower depreciation rates asthe availability of Mississippi Power's lower-cost generation resources.
Fuel and purchased power energy transactions do not have a result of the depreciation study implemented in January 2015.significant impact on earnings, since energy expenses are generally offset by energy revenues through Mississippi Power's fuel cost recovery clauses. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersMississippi PowerFuel Cost Recovery" herein and Note 31 to the financial statements under "Retail Regulatory Matters – Cost of Removal Accounting Order""Fuel Costs" for additional information.
Fuel
Fuel expense increased $2 million, or 0.5%, in 2019 compared to 2018 primarily due to a 15% increase in the volume of KWHs generated, partially offset by a 13% net decrease in the average cost of fuel per KWH generated.
Purchased Power
Purchased power expense decreased $21 million, or 51.2%, in 2019 compared to 2018. The decrease was primarily the result of a 45% decrease in the volume of KWHs purchased due to the availability of Mississippi Power's lower-cost generation resources and a 13% decrease in the average cost per KWH purchased.
Energy purchases will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's service territory, and the availability of the Southern Company system's generation. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses decreased $30 million, or 9.6%, in 2019 compared to the prior year. The decrease was primarily due to decreases of $21 million in compensation and benefit expenses primarily due to an employee attrition plan implemented in the third quarter 2018, $5 million in amortization of previously deferred Plant Ratcliffe expenses as a result of a settlement agreement reached with wholesale customers (MRA Settlement Agreement), $5 million in planned generation outage costs, and $4 million in Plant Ratcliffe waste water treatment expenses. These decreases were partially offset by a $9 million increase in overhead line maintenance and vegetation management expenses. See Note 2 to the financial statements under "Mississippi PowerMunicipal and Rural Associations Tariff" for additional information.
Depreciation and Amortization
Depreciation and amortization increased $23 million, or 13.6%, in 2019 compared to 2018 primarily related to increases in amortization associated with ECO Plan regulatory assets. See Note 2 to the financial statements under "Mississippi Power – Environmental Compliance Overview Plan" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Taxes Other Than Income Taxes
Taxes other than income taxes increased $12$6 million, or 3.3%5.6%, in 2016 and $12 million, or 3.4%, in 2015 as2019 compared to prior years. These increases were2018 primarily due to increases in state and municipal utility license tax bases primarily due to an increase in retail revenues. In addition, there were increasesof $4 million in ad valorem taxes and $2 million in franchise taxes.
Estimated Loss on Kemper IGCC
In 2019 and 2018, charges of $24 million and $37 million, respectively, were recorded associated with the abandonment and closure activities and period costs, net of sales proceeds for the mine and gasifier-related assets. The 2019 charge primarily due to an increase in assessed value of property.
Allowance for Equity Funds Used During Construction
AFUDC equity decreased $32 million, or 53.3%, in 2016 as comparedrelated to the prior year. The decrease was primarily associated with environmental compliance and steam generation capital projects being placed in service in 2016. AFUDC equity increased $11 million, or 22.4%, in 2015 as comparedexpected close out of a DOE contract related to the prior year primarily due to an increase in construction projects related to environmental and steam generation.Kemper County energy facility. See Note 12 to the financial statements under "Allowance for Funds Used During Construction""Kemper County Energy Facility" for additional information.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increased $28decreased $7 million, or 10.2%9.2%, in 20162019 compared to 2018, primarily as the result of a decrease in outstanding long-term borrowings. See Note 8 to the financial statements for additional information.
Other Income (Expense), Net
Other income (expense), net decreased $5 million in 2019 compared to 2018. The decrease was primarily due to the $24 million settlement of Mississippi Power's Deepwater Horizon claim in 2018, partially offset by a $9 million increase in interest income associated with a new tolling arrangement accounted for as a sales-type lease and a $7 million decrease in charitable donations. See Notes 3 and 9 to the financial statements under "Other MattersMississippi Power" and "Lessor," respectively, for additional information.
Income Taxes (Benefit)
Income tax expense increased $132 million, or 129.4%, in 2019 compared to 2018 primarily due to a $92 million increase related to the 2018 reduction of a valuation allowance for a state income tax net operating loss (NOL) carryforward, a $42 million increase associated with the revaluation of deferred tax assets related to the Kemper IGCC recorded in 2018 in accordance with the Tax Reform Legislation, and a $9 million increase due to higher pre-tax earnings in 2019. These increases were partially offset by $15 million associated with the flowback of excess deferred income taxes resulting from the MRA Settlement Agreement and a new tolling arrangement accounted for as a sales-type lease. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information.
Southern Power
Net income attributable to Southern Power for 2019 was $339 million, a $152 million increase from 2018, primarily due to net impacts totaling approximately $141 million from the dispositions of the Florida Plants in 2018 and Plant Nacogdoches in the second quarter 2019, which include an asset impairment charge in 2018, a gain on sale in 2019 (including the recognition of deferred ITCs), and a decrease in operations and maintenance expense, partially offset by PPA capacity revenue decreases in 2019. The increase in net income also reflects $79 million in tax expense recognized in 2018 related to the Tax Reform Legislation, a $27 million wind turbine equipment impairment charge in 2018, and net gains in 2019 of $25 million from the Roserock solar facility litigation settlement and sales of wind equipment. These increases were partially offset by $65 million in state income tax benefits recorded in 2018 arising from the reorganization of Southern Power's legal entities and reductions in net income of approximately $60 million related to the SP Wind tax equity partnership entered into in 2018.
See Note 15 to the financial statements under "Southern Power – Sales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information on the Florida Plants and Plant Nacogdoches dispositions and sales of wind turbine equipment. See Notes 7 and 10 to the financial statements under "Southern Power" and "Legal Entity Reorganizations" for additional information on the tax equity partnerships and the legal entity reorganization, respectively. Also see Note 3 to the financial statements under "General Litigation – Southern Power" for additional information on the Roserock solar facility litigation settlement.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A condensed statement of income follows:
 2019 Increase
(Decrease)
from 2018
 (in millions)
Operating revenues$1,938
 $(267)
Fuel577
 (122)
Purchased power108
 (68)
Other operations and maintenance359
 (36)
Depreciation and amortization479
 (14)
Taxes other than income taxes40
 (6)
Asset impairment3
 (153)
Gain on disposition(23) (21)
Total operating expenses1,543
 (420)
Operating income395
 153
Interest expense, net of amounts capitalized169
 (14)
Other income (expense), net47
 24
Income taxes (benefit)(56) 108
Net income329
 83
Net income (loss) attributable to noncontrolling interests(10) (69)
Net income attributable to Southern Power$339
 $152
Operating Revenues
Total operating revenues include PPA capacity revenues, which are derived primarily from long-term contracts involving natural gas facilities and a biomass generating facility (through the second quarter 2019 sale of Plant Nacogdoches), and PPA energy revenues from Southern Power's generation facilities. To the extent Southern Power has capacity not contracted under a PPA, it may sell power into an accessible wholesale market, or, to the extent those generation assets are part of the FERC-approved IIC, it may sell power into the Southern Company power pool.
Natural Gas and Biomass Capacity and Energy Revenue
Capacity revenues generally represent the greatest contribution to operating income and are designed to provide recovery of fixed costs plus a return on investment.
Energy is generally sold at variable cost or is indexed to published natural gas indices. Energy revenues will vary depending on the energy demand of Southern Power's customers and their generation capacity, as well as the market prices of wholesale energy compared to the cost of Southern Power's energy. Energy revenues also include fees for support services, fuel storage, and unit start charges. Increases and decreases in energy revenues under PPAs that are driven by fuel or purchased power prices are accompanied by an increase or decrease in fuel and purchased power costs and do not have a significant impact on net income.
Solar and Wind Energy Revenue
Southern Power's energy sales from solar and wind generating facilities are predominantly through long-term PPAs that do not have capacity revenue. Customers either purchase the energy output of a dedicated renewable facility through an energy charge or pay a fixed price related to the energy generated from the respective facility and sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors.
See FUTURE EARNINGS POTENTIAL – "Southern Power's Power Sales Agreements" herein for additional information regarding Southern Power's PPAs.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues Details
Details of Southern Power's operating revenues were as follows:
 2019 2018
 (in millions)
PPA capacity revenues$482
 $580
PPA energy revenues1,081
 1,140
Total PPA revenues1,563
 1,720
Non-PPA revenues363
 472
Other revenues12
 13
Total operating revenues$1,938
 $2,205
Operating revenues for 2019 were $1.9 billion, a $267 million, or 12%, decrease from 2018. The decrease in operating revenues was primarily due to the following:
PPA capacity revenuesdecreased $98 million, or 17%, primarily due to the sales of the Florida Plants in December 2018 and Plant Nacogdoches in June 2019. In addition, the change reflects a reduction of $34 million from the expiration of an affiliate natural gas PPA, offset by a $36 million increase in new PPA capacity revenues from existing natural gas facilities, of which $13 million related to the expansion unit at Plant Mankato.
PPA energy revenues decreased $59 million, or 5%, primarily due to a $67 million decrease in sales from natural gas facilities primarily driven by a $103 million decrease in the average cost of fuel and purchased power, partially offset by a $36 million increase in the volume of KWHs sold due to increased customer load.
Non-PPA revenues decreased $109 million, or 23%, primarily due to a $72 million decrease in the volume of KWHs sold through short-term sales and a $37 million decrease in the market price of energy.
Fuel and Purchased Power Expenses
Details of Southern Power's generation and purchased power were as follows:
 Total
KWHs
Total KWH % ChangeTotal
KWHs
 2019 2018
 (in billions of KWHs)
Generation47 46
Purchased power3 4
Total generation and purchased power50—%50
Total generation and purchased power, excluding solar, wind, and tolling agreements29—%29
Southern Power's PPAs for natural gas generation generally provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel relating to the energy delivered under such PPAs. Consequently, changes in such fuel costs are generally accompanied by a corresponding change in related fuel revenues and do not have a significant impact on net income. Southern Power is responsible for the cost of fuel for generating units that are not covered under PPAs. Power from these generating units is sold into the wholesale market or into the Southern Company power pool for capacity owned directly by Southern Power.
Purchased power expenses will vary depending on demand, availability, and the cost of generating resources throughout the Southern Company system and other contract resources. Load requirements are submitted to the Southern Company power pool on an hourly basis and are fulfilled with the lowest cost alternative, whether that is generation owned by Southern Power, an affiliate company, or external parties. Such purchased power costs are generally recovered through PPA revenues.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of Southern Power's fuel and purchased power expenses were as follows:
 2019 2018
 (in millions)
Fuel$577
 $699
Purchased power108
 176
Total fuel and purchased power expenses$685
 $875
In 2019, total fuel and purchased power expenses decreased $190 million, or 22%, compared to 2018. Fuel expensedecreased $122 million, or 17%, due to a $137 million decrease in the average cost of fuel per KWH generated, partially offset by a $15 million increase associated with the volume of KWHs generated. Purchased power expense decreased $68 million, or 39%, due to a $37 million decrease associated with the average cost of purchased power and a $31 million decrease associated with the volume of KWHs purchased.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses decreased $36 million, or 9%, compared to 2018. The decrease was due to gains totaling $17 million on the sale of wind turbine equipment, decreased expense of $17 million related to the dispositions of the Florida Plants and Plant Nacogdoches, and the recovery of $5 million in legal costs related to the Roserock solar facility litigation settlement in the first quarter 2019. See Note 15 to the financial statements under "Southern PowerDevelopment Projects" and " – Sales of Natural Gas and Biomass Plants" for additional information on the sale of wind turbine equipment and the dispositions, respectively. Also see Note 3 to the financial statements under "General Litigation Matters – Southern Power" for additional information on the litigation settlement.
Asset Impairment
Asset impairment charges totaling $156 million were recorded in 2018, including $119 million related to the sale of the Florida Plants and $36 million related to wind turbine equipment held for development projects. Asset impairment charges in 2019 were immaterial. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information.
Gain on Dispositions, Net
The sale of Plant Nacogdoches in 2019 resulted in a $23 million gain. See Note 15 to the financial statements under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2019, interest expense, net of amounts capitalized decreased $14 million, or 8%, compared to 2018, primarily due to a decrease in the amount of outstanding debt.
Other Income (Expense), Net
In 2019, other income (expense), net increased $24 million, or 104%, compared to 2018 primarily due to a $36 million gain arising from the Roserock solar facility litigation settlement in 2019, partially offset by a $14 million gain from a joint-development wind project in 2018 attributable to Southern Power's partner in the project, which was offset by a $14 million loss within noncontrolling interests. See Note 3 to the financial statements under "Southern Power" for additional information regarding the litigation settlement.
Income Taxes (Benefit)
In 2019, income tax benefit was $56 million compared to $164 million for 2018, a decrease of $108 million, primarily attributable to reductions in tax benefits of $127 million from wind PTCs primarily following the 2018 sale of a noncontrolling tax equity interest in SP Wind and $65 million from changes in state apportionment rates following the 2018 reorganizations of certain legal entities, as well as a $64 million increase in income tax expense as a result of higher pre-tax earnings, partially offset by $79 million in tax expense recognized in 2018 related to the Tax Reform Legislation and a $75 million tax benefit resulting from the recognition of deferred ITCs remaining from the original construction recognized in connection with the sale of Plant Nacogdoches.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

See FUTURE EARNINGS POTENTIAL – "Income Tax MattersFederal Tax Reform Legislation" herein and Notes 1, 10, and 15 to the financial statements under "Income Taxes," "Effective Tax Rate," and "Southern Power," respectively, for additional information.
Net Income Attributable to Noncontrolling Interests
In 2019, net income attributable to noncontrolling interests decreased $69 million, or 117%, compared to 2018. The decrease was primarily due to $92 million of losses attributable to noncontrolling interests related to the tax equity partnerships entered into in 2018 and $14 million attributable to a joint-development wind project in 2018, partially offset by an allocation of approximately $29 million of income to the noncontrolling interest partner related to the Roserock solar facility litigation settlement. See Note 3 to the financial statements under "General Litigation MattersSouthern Power" and Note 7 to the financial statements under "Southern Power" for additional information regarding the litigation settlement and tax equity partnerships, respectively.
Southern Company Gas
Operating Metrics
Southern Company Gas continues to focus on several operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.
Southern Company Gas measures weather and the effect on its business using Heating Degree Days. Generally, increased Heating Degree Days result in higher demand for natural gas on Southern Company Gas' distribution system. Southern Company Gas has various regulatory mechanisms, such as weather and revenue normalization and straight-fixed-variable rate design, which limit its exposure to weather changes within typical ranges in each of its utility's respective service territory, including Nicor Gas following the approval of a revenue decoupling mechanism for residential customers in its recent rate case. Southern Company Gas also utilizes weather hedges to limit the negative income impacts in the event of warmer-than-normal weather.
The number of customers served by gas distribution operations and gas marketing services can be impacted by natural gas prices, economic conditions, and competition from alternative fuels. Gas distribution operations and gas marketing services' customers are primarily located in Georgia and Illinois.
Southern Company Gas' natural gas volume metrics for gas distribution operations and gas marketing services illustrate the effects of weather and customer demand for natural gas. Wholesale gas services' physical sales volumes represent the daily average natural gas volumes sold to its customers.
Seasonality of Results
During the Heating Season, natural gas usage and operating revenues are generally higher as more customers are connected to the gas distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, wholesale gas services' operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Southern Company Gas' base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively evenly throughout the year. Seasonality also affects the comparison of certain balance sheet items across quarters, including receivables, unbilled revenues, natural gas for sale, and notes payable. However, these items are comparable when reviewing Southern Company Gas' annual results. Thus, Southern Company Gas' operating results can vary significantly from quarter to quarter as a result of seasonality, which is illustrated in the table below.
  
Percent Generated During
Heating Season
  Operating Revenues 
Net
Income
2019 68.7% 86.8%
2018 68.7% 96.0%
Net Income
Net income attributable to Southern Company Gas in 2019 was $585 million, an increase of $213 million, or 57.3%, compared to the prior year. The change in net income includes a $125 million increase at wholesale gas services, an increase of $57 million in continued investment in infrastructure replacement programs and base rate changes at gas distribution operations, net of depreciation, a $34 million decrease in income taxes primarily at Atlanta Gas Light due to increased flowback of excess deferred income taxes in lieu of a rate increase as previously authorized by the Georgia PSC, and an $11 million increase in earnings from equity method investments in 2019. This increase also includes a $51 million net loss in 2018 from the Southern Company Gas
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Dispositions (including the goodwill impairment charge) and $21 million in disposition-related costs in 2018, partially offset by $86 million in after-tax impairment charges in 2019. See Notes 3 and 15 to the financial statements under "Other MattersSouthern Company Gas" and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on the impairment charges. See Note 2 to the financial statements under "Southern Company Gas – Rate Proceedings – Nicor Gas" and " – Atlanta Gas Light" for additional information on the impacts of the Tax Reform Legislation. Also see FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Notes 10 and 15 to the financial statements for additional information.
A condensed income statement for Southern Company Gas follows:
 2019 Increase (Decrease) from 2018
 (in millions)
Operating revenues$3,792
 $(117)
Cost of natural gas1,319
 (220)
Cost of other sales
 (12)
Other operations and maintenance888
 (93)
Depreciation and amortization487
 (13)
Taxes other than income taxes213
 2
Impairment charges115
 73
(Gain) loss on dispositions, net
 291
Total operating expenses3,022
 28
Operating income770
 (145)
Earnings from equity method investments157
 9
Interest expense, net of amounts capitalized232
 4
Other income (expense), net20
 19
Earnings before income taxes715
 (121)
Income taxes130
 (334)
Net Income$585
 $213
The Southern Company Gas Dispositions were completed by July 29, 2018 and represent the primary variance driver for 2019 compared to 2018. Detailed variance explanations are provided herein. See Note 15 to the financial statements under "Southern Company Gas" for additional information on the Southern Company Gas Dispositions.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Operating Revenues
Operating revenues in 2019 were $3.8 billion, a $117 million decrease, compared to 2018. Details of operating revenues were as follows:
 2019
 (in millions)
Operating revenues – prior year$3,909
Estimated change resulting from –
Infrastructure replacement programs and base rate changes96
Gas costs and other cost recovery(89)
Wholesale gas services150
Southern Company Gas Dispositions(*)
(300)
Other26
Operating revenues – current year$3,792
Percent change(3.0)%
(*)
Includes a $245 million decrease related to natural gas revenues, including alternative revenue programs, and a $55 million decrease related to other revenues. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Revenues from infrastructure replacement programs and base rate changes increased in 2019 compared to the prior year primarily due to an increaseincreases of $74 million at Nicor Gas and $16 million at Atlanta Gas Light. These amounts include gas distribution operations' continued investments recovered through infrastructure replacement programs and base rate increases as well as customer refunds in debt outstanding and2018 as a reduction inresult of the amounts capitalized. Interest expense, net of amounts capitalized increased $19 million, or 7.5%, in 2015 as comparedTax Reform Legislation. See Note 2 to the prior year. The increase in 2015 was primarily due to timing of debt issuances and redemptions, partially offset by a decrease in interest rates. See FUTURE EARNINGS POTENTIAL – "Financing Activities" hereinfinancial statements under "Southern Company Gas" for additional information.
Table of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

Other Income (Expense), Net
Other income (expense), net increased $10 million, or 21.3%,Revenues associated with gas costs and other cost recovery decreased in 2016 as2019 compared to the prior year primarily due to lower natural gas prices and decreased volumes of natural gas sold. Natural gas distribution rates include provisions to adjust billings for fluctuations in natural gas costs. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. See "Cost of Natural Gas" herein for additional information.
Revenues from wholesale gas services increased in 2019 primarily due to derivative gains, partially offset by decreased commercial activity. See "Segment InformationWholesale Gas Services" herein for additional information.
Other revenues increased in 2019 primarily due to increases in customers at gas distribution operations and recovery of prior period hedge losses at gas marketing services.
Heating Degree Days
During Heating Season, natural gas usage and operating revenues are generally higher. Weather typically does not have a significant net income impact other than during the Heating Season. The following table presents the Heating Degree Days information for Illinois and Georgia, the primary locations where Southern Company Gas' operations are impacted by weather.
  Years Ended December 31, 2019 vs. normal 2019 vs. 2018
  
Normal(a)
 2019 2018 colder (warmer) colder (warmer)
  (in thousands)    
Illinois(b)
 5,782
 6,136
 6,101
 6.1 % 0.6 %
Georgia 2,529
 2,157
 2,588
 (14.7)% (16.7)%
(a)Normal represents the 10-year average from January 1, 2009 through December 31, 2018 for Illinois at Chicago Midway International Airport and for Georgia at Atlanta Hartsfield-Jackson International Airport, based on information obtained from the National Oceanic and Atmospheric Administration, National Climatic Data Center.
(b)Heating Degree Days in Illinois are expected to have a limited financial impact in future years. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas hedged its exposure to warmer-than-normal weather in Illinois for gas distribution operations and in Illinois and Georgia for gas marketing services. The remaining impacts of weather on earnings were immaterial.
Customer Count
The following table provides the number of customers served by Southern Company Gas at December 31, 2019 and 2018:
  2019 2018
  (in thousands, except market share %)
Gas distribution operations 4,277
 4,248
Gas marketing services    
Energy customers(*)
 631
 697
Market share of energy customers in Georgia 28.9% 29.0%
(*)Gas marketing services' customers are primarily located in Georgia and Illinois. Also included as of December 31, 2018 were approximately 70,000 customers in Ohio contracted through an annual auction process to serve for 12 months beginning April 1, 2018.
Southern Company Gas anticipates overall customer growth trends in gas distribution operations to continue as it expects continued improvement in the new housing market and low natural gas prices. Southern Company Gas uses a variety of targeted marketing programs to attract new customers and to retain existing customers.
Cost of Natural Gas
Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, gas distribution operations charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Gas distribution operations defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities. Therefore, gas costs recovered through natural gas revenues generally equal the amount expensed in cost of natural gas and do not affect net income from gas distribution operations. Cost of natural gas at gas distribution operations represented 84.5% of the total cost of natural gas for 2019.
Gas marketing services customers are charged for actual and estimated natural gas consumed. Cost of natural gas includes the cost of fuel and associated transportation costs, lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, if applicable, and gains and losses associated with certain derivatives.
In 2019, cost of natural gas was $1.3 billion, a decrease of $220 million, or 14.3%, compared to the prior year. Excluding a $106 million decrease related to the Southern Company Gas Dispositions, cost of natural gas decreased by $114 million, which reflects a 14.8% decrease in donations,natural gas prices compared to 2018.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Volumes of Natural Gas Sold
The following table details the volumes of natural gas sold during all periods presented.
   2019 vs. 2018
 2019 2018 % Change
Gas distribution operations (mmBtu in millions)     
Firm677
 721
 (6.1)%
Interruptible92
 95
 (3.2)%
Total(*)769
 816
 (5.8)%
Wholesale gas services (mmBtu in millions/day)     
Daily physical sales6.4
 6.7
 (4.5)%
Gas marketing services (mmBtu in millions)     
Firm:     
Georgia33
 37
 (10.8)%
Illinois12
 13
 (7.7)%
Other15
 20
 (25.0)%
Interruptible large commercial and industrial14
 14
  %
Total74
 84
 (11.9)%
(*)Includes total volumes of natural gas sold of 38 mmBtu for 2018 related to Elizabethtown Gas, Elkton Gas, and Florida City Gas, which were sold in July 2018. See Note 15 to the financial statements under "Southern Company Gas – Sale of Elizabethtown Gas and Elkton Gas" and " – Sale of Florida City Gas" for additional information.
Cost of Other Sales
Cost of other sales related to Pivotal Home Solutions, which was sold on June 4, 2018. See Note 15 to the financial statements under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Other Operations and Maintenance Expenses
In 2019, other operations and maintenance expenses decreased $93 million, or 9.5%, compared to the prior year. Excluding a $65 million decrease related to the Southern Company Gas Dispositions, other operations and maintenance expenses decreased $28 million. This decrease was primarily due to $28 million of disposition-related costs incurred during 2018, a $12 million adjustment in 2018 for the adoption of a new paid time off policy, an $11 million expense for a litigation settlement to facilitate the sale of Pivotal Home Solutions in 2018, and a $7 million decrease in compensation and benefits costs, partially offset by a decrease$22 million increase in sales of non-utility property. Other income (expense), netrider expenses, primarily at Nicor Gas, passed through directly to customers. See FUTURE EARNINGS POTENTIAL – "Southern Company GasUtility Regulation and Rate Design" herein for additional information.
Depreciation and Amortization
In 2019, depreciation and amortization decreased $25$13 million, or 113.6%2.6%, compared to the prior year. Excluding a $27 million decrease related to the Southern Company Gas Dispositions, depreciation and amortization increased $14 million. This increase was primarily due to continued infrastructure investments at gas distribution operations, partially offset by accelerated depreciation related to assets retired in 2015 as2018. See Note 2 to the financial statements under "Southern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information.
Impairment Charges
In 2019, Southern Company Gas recorded impairment charges of $91 million related to a natural gas storage facility in Louisiana and $24 million in contemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. In 2018, a goodwill impairment charge of $42 million was recorded in contemplation of the sale of Pivotal Home Solutions. See Notes 1, 3, and 15 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities," "Other MattersSouthern Company Gas," and "Southern Company Gas," respectively, for additional information.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(Gain) Loss on Dispositions, Net
In 2018, gain on dispositions, net was $291 million and was associated with the Southern Company Gas Dispositions. The income tax expense on these gains included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously.
Earnings from Equity Method Investments
In 2019, earnings from equity method investments increased $9 million, or 6.1%, compared to the prior year and reflect higher earnings from SNG as a result of rate increases that became effective September 2018, partially offset by a $6 million pre-tax loss on the sale of Triton in May 2019. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Other Income (Expense), Net
In 2019, other income (expense), net increased $19 million compared to the prior year. This increase primarily resulted from a $23 million decrease in charitable donations in 2019.
Income Taxes
In 2019, income taxes decreased $334 million, or 72.0%, compared to the prior year. This decrease primarily reflects a reduction of $348 million related to the Southern Company Gas Dispositions, as well as $29 million in benefits associated with impairment charges in 2019 and additional benefits from the flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light as previously authorized by the Georgia PSC, partially offset by $48 million of additional taxes associated with increased pre-tax earnings at wholesale gas services.
See FUTURE EARNINGS POTENTIAL – "Income Tax Matters" herein and Note 10 to the financial statements for additional information. Also see Notes 2, 3, and 15 to the financial statements under "Southern Company Gas," "Other MattersSouthern Company Gas," and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information on Atlanta Gas Light's regulatory treatment of the impacts of the Tax Reform Legislation and the impairment charges.
Performance and Non-GAAP Measures
Adjusted operating margin is a non-GAAP measure that is calculated as operating revenues less cost of natural gas, cost of other sales, and revenue tax expense. Adjusted operating margin excludes other operations and maintenance expenses, depreciation and amortization, taxes other than income taxes, impairment charges, and gain (loss) on dispositions, net, which are included in the calculation of operating income as calculated in accordance with GAAP and reflected in the statements of income. The presentation of adjusted operating margin is believed to provide useful information regarding the contribution resulting from base rate changes, infrastructure replacement programs and capital projects, and customer growth at gas distribution operations since the cost of natural gas and revenue tax expense can vary significantly and are generally billed directly to customers. Southern Company Gas further believes that utilizing adjusted operating margin at gas pipeline investments, wholesale gas services, and gas marketing services allows it to focus on a direct measure of performance before overhead costs. The applicable reconciliation of operating income to adjusted operating margin is provided herein.
Adjusted operating margin should not be considered an alternative to, or a more meaningful indicator of, Southern Company Gas' operating performance than operating income as determined in accordance with GAAP. In addition, Southern Company Gas' adjusted operating margin may not be comparable to similarly titled measures of other companies.
Detailed variance explanations of Southern Company Gas' financial performance are provided herein.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Reconciliations of operating income to adjusted operating margin are as follows:
 2019 2018
 (in millions)
Operating Income$770
 $915
Other operating expenses(a)
1,703
 1,443
Revenue taxes(b)
(114) (111)
Adjusted Operating Margin$2,359
 $2,247
(a)Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, impairment charges, and gain (loss) on dispositions, net.
(b)Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Segment Information
   2019 2018
  
 Adjusted Operating Margin(a)
 
Operating Expenses(a)
 Net Income (Loss) 
 Adjusted Operating Margin(a)
 
Operating Expenses (a)(b)
 
Net Income (Loss)(b)
  (in millions) (in millions)
Gas distribution operations $1,799
 $1,226
 $337
 $1,794
 $890
 $334
Gas pipeline investments 32
 12
 94
 32
 12
 103
Wholesale gas services 273
 54
 163
 134
 64
 38
Gas marketing services 234
 122
 83
 263
 244
 (40)
All other 28
 182
 (92) 33
 131
 (63)
Intercompany eliminations (7) (7) 
 (9) (9) 
Consolidated $2,359
 $1,589
 $585
 $2,247
 $1,332
 $372
(a)Adjusted operating margin and operating expenses are adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
(b)
Operating expenses for gas distribution operations and gas marketing services include the gain on dispositions, net. Net income for gas distribution operations and gas marketing services includes the gain on dispositions, net and the associated income tax expense. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
Gas Distribution Operations
Gas distribution operations is the largest component of Southern Company Gas' business and is subject to regulation and oversight by agencies in each of the states it serves. These agencies approve natural gas rates designed to provide Southern Company Gas with the opportunity to generate revenues to recover the cost of natural gas delivered to its customers and its fixed and variable costs, including depreciation, interest expense, operations and maintenance, taxes, and overhead costs, and to earn a reasonable return on its investments.
With the exception of Atlanta Gas Light, Southern Company Gas' second largest utility that operates in a deregulated natural gas market and has a straight-fixed-variable rate design that minimizes the variability of its revenues based on consumption, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are a function of weather conditions, price levels for natural gas, and general economic conditions that may impact customers' ability to pay for natural gas consumed. Southern Company Gas has various weather mechanisms, such as weather normalization mechanisms and weather derivative instruments, that limit its exposure to weather changes within typical ranges in its natural gas distribution utilities' service territories.
In July 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Also in July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. See Note 15 to the financial statements under "Southern Company Gas" for additional information.
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The following table details the results of gas distribution operations including and excluding the impact of the utilities sold in 2018.
Favorable(unfavorable) 2019 vs 2018 Impacts of Utilities Sold in 2018 Variance Excluding Utilities Sold in 2018
  (in millions)
Adjusted Operating Margin $5
 $138
 $143
Operating expenses (336) 246
 (90)
Other income (expense), net (3) 
 (3)
Interest expenses (9) (13) (22)
Income tax expense 346
 (315) 31
Net income $3
 $56
 $59
Excluding the impact of the utilities sold in 2018, net income in 2019 increased $59 million, or 21.2%, compared to the prior year. The $143 million increase in adjusted operating margin reflects additional revenue from base rate increases and continued investment recovered through infrastructure replacement programs, a decrease in refunds associated with bad debt riders, and the customer refunds in 2018 as a result of the Tax Reform Legislation. The $90 million increase in operating expenses includes increases in compensation and benefit costs and rider expenses passed through directly to customers, as well as additional depreciation primarily due to additional assets placed in service. The $3 million decrease in other income (expense), net is primarily due to a contractor litigation settlement in 2018. The $22 million increase in interest expense is primarily from the issuance of first mortgage bonds at Nicor Gas. The $31 million decrease in income tax expense is primarily due to an increase in donationsthe flowback of excess deferred income taxes in 2019 primarily at Atlanta Gas Light.
See Note 2 to the financial statements under "Southern Company GasRate ProceedingsAtlanta Gas Light" and a decrease" – Infrastructure Replacement Programs and Capital ProjectsAtlanta Gas LightPRP" herein for additional information on Atlanta Gas Light's stipulation reflecting the impacts of the Tax Reform Legislation and the contractor litigation settlement, respectively.
Gas Pipeline Investments
Gas pipeline investments consists primarily of joint ventures in sales of non-utility property.natural gas pipeline investments including SNG, Atlantic Coast Pipeline, PennEast Pipeline, and Dalton Pipeline. See Note 7 to the financial statements under "Southern Company Gas" for additional information.
Income Taxes
Income taxes increased $25Net income in 2019 decreased $9 million, or 4.9%8.7%, in 2016 as compared to the prior year. This decrease primarily relates to an increase in tax expense due to changes in state apportionment rates, partially offset by higher earnings from SNG.
Wholesale Gas Services
Wholesale gas services is involved in asset management and optimization, storage, transportation, producer and peaking services, natural gas supply, natural gas services, and wholesale gas marketing. Southern Company Gas has positioned the business to generate positive economic earnings on an annual basis even under low volatility market conditions that can result from a number of factors. When market price volatility increases, wholesale gas services is well positioned to capture significant value and generate stronger results. Operating expenses primarily reflect employee compensation and benefits.
Net income in 2019 increased $125 million, or 328.9%, compared to the prior year. This increase primarily relates to a $139 million increase in adjusted operating margin, a $10 million decrease in operating expenses, and a $20 million increase in other income (expense), partially offset by a $48 million increase in income taxes.
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Details of adjusted operating margin are provided in the table below.
 2019 2018
 (in millions)
Commercial activity recognized$54
 $254
Gain on storage derivatives40
 9
Gain (loss) on transportation and forward commodity derivatives186
 (119)
LOCOM adjustments, net of current period recoveries(16) (7)
Purchase accounting adjustments to fair value inventory and contracts9
 (3)
Adjusted operating margin$273
 $134
Change in Commercial Activity
The commercial activity at wholesale gas services includes recognition of storage and transportation values that were generated in prior periods, which reflect the impact of prior period hedge gains and losses as associated physical transactions occur. The decrease in commercial activity in 2019 compared to the prior year was primarily due to significant natural gas price volatility that resulted from prolonged cold weather during 2018 coupled with low natural gas supply.
Change in Storage and Transportation Derivatives
Volatility in the natural gas market arises from a number of factors, such as weather fluctuations or changes in supply or demand for natural gas in different regions of the U.S. The volatility of natural gas commodity prices has a significant impact on Southern Company Gas' customer rates, long-term competitive position against other energy sources, and the ability of wholesale gas services to capture value from locational and seasonal spreads. Forward storage or time spreads applicable to the locations of wholesale gas services' specific storage positions in 2019 resulted in storage derivative gains. Transportation and forward commodity derivative gains in 2019 are primarily the result of narrowing transportation spreads due to supply constraints and increases in natural gas supply, which impacted forward prices at natural gas receipt and delivery points, primarily in the Northeast and Midwest regions.
The natural gas that wholesale gas services purchases and injects into storage is accounted for at the LOCOM value utilizing gas daily or spot prices at the end of the year. See Note 1 to the financial statements under "Natural Gas for Sale" for additional information.
Withdrawal Schedule and Physical Transportation Transactions
The expected natural gas withdrawals from storage and expected offset to prior hedge losses/gains associated with the transportation portfolio of wholesale gas services are presented in the following table, along with the net operating revenues expected at the time of withdrawal from storage and the physical flow of natural gas between contracted transportation receipt and delivery points. Wholesale gas services' expected net operating revenues exclude storage and transportation demand charges, as well as other variable fuel, withdrawal, receipt, and delivery charges, and exclude estimated profit sharing under asset management agreements. Further, the amounts that are realizable in future periods are based on the inventory withdrawal schedule, planned physical flow of natural gas between the transportation receipt and delivery points, and forward natural gas prices at December 31, 2019. A portion of wholesale gas services' storage inventory and transportation capacity is economically hedged with futures contracts, which results in the realization of substantially fixed net operating revenues.
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 Storage Withdrawal  
 
Total storage(a)
 
Expected net operating losses(b)
 
Physical Transportation Transactions – Expected Net Operating Gains(c)
 (in mmBtu in millions) (in millions) (in millions)
202061
 $6
 $(119)
2021 and thereafter
 
 (67)
Total at December 31, 201961
 $6
 $(186)
(a)At December 31, 2019, the WACOG of wholesale gas services' expected natural gas withdrawals from storage was $1.87 per mmBtu.
(b)Represents expected operating losses from planned storage withdrawals associated with existing inventory positions and could change as wholesale gas services adjusts its daily injection and withdrawal plans in response to changes in future market conditions and forward NYMEX price fluctuations.
(c)Represents the expected net gains during the periods in which the derivatives will be settled and the physical transportation transactions will occur that offset the derivative gains and losses previously recognized.
Gas Marketing Services
Gas marketing services provides energy-related products and services to natural gas markets and participants in customer choice programs that were approved in various states to increase competition. These programs allow customers to choose their natural gas supplier while the local distribution utility continues to provide distribution and transportation services. Gas marketing services is weather sensitive and uses a variety of hedging strategies, such as weather derivative instruments and other risk management tools, to partially mitigate potential weather impacts.
On June 4, 2018, Southern Company Gas completed the sale of Pivotal Home Solutions to American Water Enterprises LLC. See Note 15 under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Net income increased $123 million in 2019 compared to the prior year. This increase primarily relates to a $122 million decrease in operating expenses and a $27 million decrease in income tax expense, partially offset by a $29 million decrease in adjusted operating margin.
Excluding a $43 million decrease attributable to the 2018 disposition of Pivotal Home Solutions, adjusted operating margin increased $14 million, which primarily reflects favorable margins and recovery of prior period hedge losses. Excluding a $116 million decrease attributable to the 2018 disposition of Pivotal Home Solutions that includes the related goodwill impairment charge, operating expense decreased $6 million due to lower amortization of intangible assets. Excluding a $33 million decrease attributable to the 2018 disposition of Pivotal Home Solutions, income tax expense increased $6 million primarily due to higher pre-tax earnings.
DividendsAll Other
All other includes Southern Company Gas' storage and fuels operations and its investment in Triton through completion of its sale on PreferredMay 29, 2019, AGL Services Company, and Preference StockSouthern Company Gas Capital, as well as various corporate operating expenses that are not allocated to the reportable segments and interest income (expense) associated with affiliate financing arrangements.
Dividends on preferred and preference stock decreased $9Net loss increased $29 million, or 34.6%46.0%, in 2016 and $13 million, or 33.3%, in 2015 as2019 compared to the prior years.year. This increase primarily reflects a $51 million increase in operating expenses, partially offset by a $39 million decrease in income taxes. The decreases wereincrease in operating expenses primarily reflects a $91 million impairment charge related to a natural gas storage facility in Louisiana and a $24 million impairment charge in contemplation of the sale of Southern Company Gas' interests in Pivotal LNG and Atlantic Coast Pipeline, partially offset by a $12 million one-time adjustment in the first quarter 2018 for the adoption of a new paid time off policy, $28 million of disposition-related costs incurred during 2018, and a $14 million decrease in depreciation and amortization. The decrease in income taxes reflects a $29 million benefit due to the redemptionimpairment charge, a $13 million benefit related to the reversal of a federal income tax valuation allowance in May 2015connection with the sale of certain seriesTriton, the impact of preferreddeferred tax expenses related to the enactment of the State of Illinois income tax legislation in 2018, and preference stock.changes in state income tax apportionment factors in several states during 2019. See Note 63 to the financial statements under "Redeemable Preferred"Other MattersSouthern Company Gas," Note 10 to the financial statements, and Preference Stock"Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Segment Reconciliations
Reconciliations of operating income to adjusted operating margin for 2019 and 2018 are provided in the following tables. See Note 16 to the financial statements under "Southern Company Gas" for additional segment information.
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 2019
 Gas Distribution OperationsGas Pipeline InvestmentsWholesale Gas ServicesGas Marketing ServicesAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$573
$20
$219
$112
$(154)$
$770
Other operating expenses(a)
1,340
12
54
122
182
(7)1,703
Revenue tax expense(b)
(114)




(114)
Adjusted Operating Margin$1,799
$32
$273
$234
$28
$(7)$2,359
 2018
 Gas Distribution OperationsGas Pipeline InvestmentsWholesale Gas ServicesGas Marketing ServicesAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$904
$20
$70
$19
$(98)$
$915
Other operating expenses(a)
1,001
12
64
244
131
(9)1,443
Revenue tax expense(b)
(111)




(111)
Adjusted Operating Margin$1,794
$32
$134
$263
$33
$(9)$2,247
(a)Includes other operations and maintenance, depreciation and amortization, taxes other than income taxes, impairment charges, and (gain) loss on dispositions, net.
(b)Nicor Gas' revenue tax expenses, which are passed through directly to customers.
Effects of Inflation
The Company istraditional electric operating companies and the natural gas distribution utilities are subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Southern Power is party to long-term contracts reflecting market-based rates, including inflation expectations. Any adverse effect of inflation on the Company'sRegistrants' results of operations has not been substantial in recent years. See Note 32 to the financial statements under "Retail Regulatory Matters – Rate RSE" for additional information.information on rate regulation.
FUTURE EARNINGS POTENTIAL
General
The Company operates as a vertically integrated utility providingPrices for electric service to retail and wholesale customers within its traditional service territory located in the State of Alabama and to wholesale customers in the Southeast. Prices for electricity provided by the Companytraditional electric operating companies and natural gas distributed by the natural gas distribution utilities to retail customers are set by the Alabama PSCstate PSCs or other applicable state regulatory agencies under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations.Southern Power continues to focus on long-term PPAs. See ACCOUNTING POLICIES"Application"Application of Critical Accounting Policies and EstimatesUtility Regulation"Regulation" herein and Note 32 to the financial statements under "Retail Regulatory Matters" for additional information about regulatory matters.
TheEach Registrant's results of operations for the past three years are not necessarily indicative of its future earnings potential. Recent disposition activities described under "Acquisitions and Dispositions" herein and in Note 15 to the financial statements will impact future earnings for the applicable Registrants. The level of the Company'sRegistrants' future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Company'sRegistrants' primary businessbusinesses of selling electricity. Theseelectricity and/or distributing natural gas, as described further herein.
For the traditional electric operating companies, these factors include the Company's ability to maintain a constructive regulatory environmentenvironments that continues to allow for the timely recovery of prudently-incurred costs during a time of increasing costs, continued customer growth, and limited projected demand growth over the next several years. Future earnings will be driven primarily bytrend of reduced electricity usage per customer, growth. especially in residential and commercial markets. Other major factors include Plant Vogtle Units 3 and 4 construction and rate recovery related thereto for Georgia Power and the ability to prevail against legal challenges associated with the Kemper County energy facility for Mississippi Power.
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Earnings in the electricity business will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies, and increasing volumes of electronic commerce transactions. transactions, and, for Georgia Power, more multi-family home construction, all of which could contribute to a net reduction in customer usage.
The level of future earnings for Southern Power's competitive wholesale electric business depends on numerous factors including Southern Power's ability to execute its growth strategy through the development or acquisition of renewable facilities and other energy projects while containing costs, as well as regulatory matters, creditworthiness of customers, total electric generating capacity available in Southern Power's market areas, and Southern Power's ability to successfully remarket capacity as current contracts expire. In addition, renewable portfolio standards, transmission constraints, cost of generation from units within the Southern Company power pool, and operational limitations could influence Southern Power's future earnings.
The level of future earnings for Southern Company Gas' primary business of distributing natural gas and its complementary businesses in the gas pipeline investments, wholesale gas services, and gas marketing services sectors depends on numerous factors. These factors include the natural gas distribution utilities' ability to maintain constructive regulatory environments that allow for the timely recovery of prudently-incurred costs, the completion and subsequent operation of ongoing infrastructure and other construction projects, creditworthiness of customers, and Southern Company Gas' ability to optimize its transportation and storage positions and to re-contract storage rates at favorable prices. The volatility of natural gas prices has an impact on Southern Company Gas' customer rates, its long-term competitive position against other energy sources, and the ability of Southern Company Gas' gas marketing services and wholesale gas services businesses to capture value from locational and seasonal spreads. Additionally, changes in commodity prices subject a portion of Southern Company Gas' operations to earnings variability. Over the longer term, volatility is expected to be low to moderate and locational and/or transportation spreads are expected to decrease as new pipelines are built to reduce the existing supply constraints in the shale areas of the Northeast U.S. To the extent these pipelines are further delayed or not built, volatility could increase. See "Construction Programs" herein for additional information on permitting challenges experienced by the Atlantic Coast Pipeline and the PennEast Pipeline. Additional economic factors may contribute to this environment, including a significant drop in oil and natural gas prices, which could lead to consolidation of natural gas producers or reduced levels of natural gas production. Further, if economic conditions continue to improve, the demand for natural gas may increase, which may cause natural gas prices to rise and drive higher volatility in the natural gas markets on a longer-term basis.
Earnings for both the electricity and natural gas businesses are subject to a variety of other factors. These factors include weather, competition, developing new and maintaining existing energy contracts and associated load requirements with other utilities,wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the priceprices of electricity and natural gas, and the price elasticity of demand,demand. Demand for electricity and natural gas in the rateRegistrants' service territories is primarily driven by the pace of economic growth or decline in the Company's service territory. Demand for electricity is primarily driven by economic growth. The pace of economic growth and electricity demandthat may be affected by changes in regional and global economic conditions, which may impact future earnings. Current proposals related
Mississippi Power provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to potential tax reform legislationregulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total operating revenues in 2019 and are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expendituresgenerally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be deducted,followed by the other wholesale customers.
As part of its ongoing effort to adapt to changing market conditions, Southern Company continues to evaluate and eliminatingconsider a wide array of potential business strategies. These strategies may include business combinations, partnerships, and acquisitions involving other utility or non-utility businesses or properties, disposition of certain assets or businesses, internal restructuring, or some combination thereof. Furthermore, Southern Company may engage in new business ventures that arise from competitive and regulatory changes in the interest deduction. utility industry. Pursuit of any of the above strategies, or any combination thereof, may significantly affect the business operations, risks, and financial condition of Southern Company. In addition, Southern Power and Southern Company Gas regularly consider and evaluate joint development arrangements as well as acquisitions and dispositions of businesses and assets as part of their business strategies. See "Acquisitions and Dispositions" herein and Note 15 to the financial statements for additional information.
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Acquisitions and Dispositions
See Note 15 to the financial statements for additional information.
Southern Company
On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax). In 2018, net income attributable to Gulf Power was $160 million.
Alabama Power
On September 6, 2019, Alabama Power entered into a purchase and sale agreement (Autauga Combined Cycle Acquisition) to acquire all of the equity interests in Tenaska Alabama II Partners, L.P. Tenaska Alabama II Partners, L.P. owns and operates an approximately 885-MW combined cycle generation facility in Autauga County, Alabama. The transaction is expected to close by September 1, 2020. As part of the Autauga Combined Cycle Acquisition, Alabama Power will assume an existing power sales agreement under which the full output of the generating facility remains committed to another third party for its remaining term of approximately three years. The estimated revenues from the power sales agreement are expected to offset the associated costs of operation during the remaining term.
The completion of the Autauga Combined Cycle Acquisition is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC and the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
The ultimate impactoutcome of any tax reform proposals is dependent on the final form of any legislation enacted and the related transition rules andthis matter cannot be determined at this time, but could have time.
Southern Power
Acquisitions
During 2019, Southern Power acquireda material impactcontrolling interest in the fuel cell generation facility listed below and acquired the Skookumchuck wind facility discussed under "Construction ProgramsSouthern Power" herein. Acquisition-related costs were expensed as incurred and were not material.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Southern Power Ownership
Percentage
CODPPA CounterpartyPPA Remaining Period
DSGP(a)
Fuel Cell28Delaware100% of Class B
N/A(b)
Delmarva Power & Light15 years
(a)During 2019, Southern Power made a total investment of approximately $167 million in DSGP and now holds a controlling interest and consolidates 100% of DSGP's operating results. Southern Power records net income attributable to noncontrolling interests for approximately 10 MWs of the facility.
(b)Southern Power's 18-MW share of the facility was repowered between June and August 2019. In December 2019, a Class C member joined the existing partnership between the Class A member and Southern Power and made an investment to repower the remaining 10 MWs. In connection with the Class C member joining the partnership, the original fuel cells (before repower), which had a carrying value of approximately $55 million, were distributed to the Class A member in a non-cash transaction that was excluded from the statements of cash flows.
Development Projects
Southern Power continues to evaluate and refine the deployment of the remaining wind turbine equipment purchased in 2016 and 2017 to development and construction projects. Wind projects utilizing equipment purchased in 2016 and 2017, and reaching commercial operation by the end of 2020 and 2021, are expected to qualify for 100% and 80% PTCs, respectively. The significant majority of this equipment either has been deployed to completed projects, projects under construction, or projects that are probable of being completed or has been sold to third parties. Sales during 2019 resulted in gains totaling approximately $17 million.
Sales of Renewable Facility Interests
In May 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion. Since Southern Power retained control of the limited partnership through its wholly-owned general partner, the sale was recorded as an
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Southern Company and Subsidiary Companies 2019 Annual Report

equity transaction. Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with their partnership ownership interests.
In December 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of eight operating wind facilities, to three financial investors for approximately $1.2 billion. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive 99% of the tax attributes, including future PTCs.
Southern Power consolidates each entity, as the primary beneficiary of the VIE, since it controls the most significant activities, including operating and maintaining the assets.
Sales of Natural Gas and Biomass Plants
In December 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million, including working capital adjustments. In contemplation of this sale transaction, Southern Power recorded an asset impairment charge of approximately $119 million ($89 million after tax) in May 2018. Pre-tax net income for the Florida Plants was $49 million for the period from January 1, 2018 to December 4, 2018.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments. Southern Power recorded a gain of $23 million ($88 million after tax) on the Company'ssale. The pre-tax net income for Plant Nacogdoches was $13 million and $27 million for the period from January 1, 2019 to June 13, 2019 and for the year ended 2018, respectively.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments. The sale resulted in a gain of approximately $39 million ($23 million after tax) in 2020. Pre-tax net income for Plant Mankato was $29 million and immaterial for the years ended December 31, 2019 and 2018, respectively. The assets and liabilities of Plant Mankato are classified as held for sale as of December 31, 2019 and 2018.
Southern Company Gas
In June 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC. Southern Company Gas and American Water Enterprises LLC entered into a transition services agreement whereby Southern Company Gas provided certain administrative and operational services through November 4, 2018.
In July 2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the sales of the assets of two of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. Southern Company Gas and South Jersey Industries, Inc. entered into transition services agreements whereby Southern Company Gas will provide certain administrative and operational services through no later than July 31, 2020.
In July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Pivotal Utility Holdings, which primarily consisted of Florida City Gas, to NextEra Energy. Southern Company Gas and NextEra Energy entered into a transition services agreement whereby Southern Company Gas will provide certain administrative and operational services through no later than July 29, 2020.
The Southern Company Gas Dispositions resulted in a net loss of $51 million in 2018, which includes $342 million of tax expense. The after-tax impacts of these dispositions included income tax expense on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. In addition, a goodwill impairment charge of $42 million was recorded during 2018 in contemplation of the sale of Pivotal Home Solutions.
The Southern Company Gas Dispositions materially decreased Southern Company Gas' subsequent earnings and cash flows. For the year ended December 31, 2018, pre-tax earnings attributable to these dispositions were $297 million, which includes a $291 million gain on dispositions, net and a $42 million goodwill impairment. Due to the seasonal nature of the natural gas business and other factors including, but not limited to, weather, regulation, competition, customer demand, and general economic conditions, these results are not necessarily indicative of the results to be expected for any other period.
On May 29, 2019, Southern Company Gas sold its investment in Triton, a cargo container leasing company. This disposition resulted in a pre-tax loss of $6 million and a net after-tax gain of $7 million as a result of reversing a $13 million federal income tax valuation allowance.
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an
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aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive two payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3, 7, and 15 to the financial statements.statements under "Southern Company Gas – Gas Pipeline Projects," "Southern Company Gas – Equity Method Investments," and "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
Environmental Matters
ComplianceThe Southern Company system's operations are regulated by state and federal environmental agencies through a variety of laws and regulations governing air, water, land, and other natural resources. The Southern Company system maintains comprehensive environmental compliance and GHG strategies to assess both current and upcoming requirements and compliance costs relatedassociated with these environmental laws and regulations. The costs required to federal and statecomply with environmental statuteslaws and regulations and to achieve stated goals, including capital expenditures, operations and maintenance costs, and costs reflected in ARO liabilities, may impact future electric generating unit retirement and replacement decisions, results of operations, cash flows, and/or financial condition. Related costs may result from the installation of additional environmental controls, closure and monitoring of CCR facilities, unit retirements, or changing fuel sources for certain existing units, as well as related upgrades to the Southern Company system's transmission and distribution (electric and natural gas) systems. A major portion of these costs is expected to be recovered through retail and wholesale rates, including existing ratemaking and billing provisions. The ultimate impact of environmental laws and regulations and the GHG goals discussed herein will depend on various factors, such as state adoption and implementation of requirements, the availability and cost of any deployed technology, fuel prices, and the outcome of pending and/or future legal challenges.
New or revised environmental laws and regulations could affect many areas of operations for the Subsidiary Registrants. The impact of any such changes cannot be determined at this time. Environmental compliance costs could affect earnings if such costs cannot continue to be fully recovered in rates on a timely basis. Environmental compliance spending overbasis in rates for the next several years may differ materially fromtraditional electric operating companies and the amounts estimated. The timing, specific requirements,natural gas distribution utilities or through long-term wholesale agreements for the traditional electric operating companies and estimated costs could change as environmental statutes and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are completed. Environmental compliance costs are recovered through Rate CNP Compliance. See Note 3 to
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)Southern Power.
Alabama Power and Mississippi Power recover environmental compliance costs through separate mechanisms, Rate CNP Compliance and the ECO Plan, respectively. Georgia Power's base rates include an Environmental Compliance Cost Recovery (ECCR) tariff that allows for the recovery of environmental compliance costs. The natural gas distribution utilities of Southern Company 2016 Annual Report

Gas generally recover environmental remediation expenditures through rate mechanisms approved by their applicable state regulatory agencies. See Notes 2 and 3 to the financial statements under "Retail Regulatory Matters – Rate CNP Compliance" for additional information.
Southern Power's PPAs generally contain provisions that permit charging the counterparty with some of the new costs incurred as a result of changes in environmental laws and regulations. Since Southern Power's units are newer natural gas and renewable generating facilities, costs associated with environmental compliance for these facilities have been less significant than for similarly situated coal or older natural gas generating facilities. Environmental, natural resource, and land use concerns, including the applicability of air quality limitations, the potential presence of wetlands or threatened and endangered species, the availability of water withdrawal rights, uncertainties regarding impacts such as increased light or noise, and concerns about potential adverse health impacts can, however, increase the cost of siting and operating any type of future electric generating facility. The impact of such laws, regulations, and other considerations on Southern Power and subsequent recovery through PPA provisions cannot be determined at this time.
Further, higherincreased costs that are recovered through regulated rates could contribute to reduced demand for electricity and natural gas, which could negatively affect results of operations, cash flows, andand/or financial condition. See Note 3 to the financial statements under "Environmental Matters" for additional information.
Environmental Statutes and Regulations
General
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Applicable statutes include the Clean Air Act; the Clean Water Act; the Comprehensive Environmental Response, Compensation, and Liability Act; the Resource Conservation and Recovery Act; the Toxic Substances Control Act; the Emergency Planning & Community Right-to-Know Act; the Endangered Species Act; the Migratory Bird Treaty Act; the Bald and Golden Eagle Protection Act; and related federal and state regulations. Compliance with these environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions. Through 2016, the Company had invested approximately $4.2 billion in environmental capital retrofit projects to comply with these requirements, with annual totals of approximately $260 million, $349 million, and $355 million for 2016, 2015, and 2014, respectively. The Company expects that capital expenditures to comply with environmental statutes and regulations will total approximately $1.3 billion from 2017 through 2021, with annual totals of approximately $471 million, $349 million, $115 million, $142 million, and $196 million for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential capital expenditures that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. The Company also anticipates costs associated with ash pond closure and ground water monitoring under the Disposal of Coal Combustion Residuals from Electric Utilities final rule (CCR Rule), which are reflected in the Company's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" and Note 1 to the financial statements under "Asset Retirement Obligations and Other Cost of Removal" herein for additional information.
The Company's ultimate environmental compliance strategy, including potential unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations, including the environmental regulations described below; the time periods over which compliance with regulations is required; individual state implementation of regulations, as applicable; the outcome of any legal challenges to the environmental rules; any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology; the Company's fuel mix; and environmental remediation requirements. Compliance costs may arise from existing unit retirements, installation of additional environmental controls, upgrades to the transmission system, closure and monitoring of CCR facilities, and adding or changing fuel sources for certain existing units. The ultimate outcome of these matters cannot be determined at this time.
Compliance with any new federal or state legislation or regulations relating to air, water, and land resources or other environmental and health concerns could significantly affect the Company. Although new or revised environmental legislation or regulations could affect many areas of the Company's operations, the full impact of any such changes cannot be determined at this time. Additionally, many of the Company's commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity.electricity and natural gas.
Air Quality
Compliance withAlthough the Clean Air Acttiming, requirements, and resultingestimated costs could change as environmental laws and regulations has beenare adopted or modified, as compliance plans are revised or updated, and will continueas legal challenges to be a significant focus for the Company.
In 2012, the EPA finalized the Mercury and Air Toxics Standards (MATS) rule, which imposes stringent emissions limits for acid gases, mercury, and particulate matter on coal- and oil-fired electric utility steam generating units. The implementation strategy for the MATS rule included emission controls, retirements, and fuel conversions at affected units. All of the Company's units thatrules are subject to the MATS ruleinitiated or completed, the measures necessary to achieve compliance with this rule or were retired prior to or during 2016.
The EPA regulates ground level ozone concentrations through implementation of an eight-hour ozone National Ambient Air Quality Standard (NAAQS). In 2008, the EPA adopted a revised eight-hour ozone NAAQS and published its final area designations in 2012. All areas within the Company's service territory have achieved attainment of the 2008 standard. In October 2015, the EPA published a more stringent eight-hour ozone NAAQS. This new standard could potentially require additional emission controls, improvements in control efficiency, and operational fuel changes and could affect the siting of new generatingestimated capital
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


facilities. States were required to recommend area designations by October 2016, and no areas within the Company's service territory were proposed for designation as nonattainment.
The EPA regulates fine particulate matter concentrationsexpenditures through an annual and 24-hour average NAAQS,2024 based on standards promulgated in 1997, 2006,the current environmental compliance strategy for the Southern Company system and 2012. All areas in which the Company's generating unitstraditional electric operating companies are located have been determined by the EPA to be in attainmentas follows:
 20202021202220232024Total
 (in millions)
Southern Company$223
$250
$244
$214
$131
$1,062
Alabama Power80
77
82
97
103
439
Georgia Power115
156
152
105
23
551
Mississippi Power28
17
10
12
5
72
These estimates do not include any costs associated with those standards.
In 2010, the EPA revised the NAAQSpotential regulation of GHG emissions. See "Global Climate Issues" herein for sulfur dioxide (SO2), establishing a new one-hour standard. No areas within the Company's service territory have been designated as nonattainment under this standard. However, in 2015, the EPA finalized a data requirements rule to support final EPA designation decisions for all remaining areasadditional information. The Southern Company system also anticipates substantial expenditures associated with ash pond closure and ground water monitoring under the SO2 standard,CCR Rule and related state rules, which could result in nonattainment designations for areas within the Company's service territory. Nonattainment designations could require additional reductions in SO2 emissions and increased compliance and operational costs.
In 2014, the EPA proposed to delete from the Alabama State Implementation Plan (SIP) the Alabama opacity rule that the EPA approved in 2008, which provides operational flexibility to affected units. In 2013, the U.S. Court of Appeals for the Eleventh Circuit ruled in favor of the Company and vacated an earlier attempt by the EPA to rescind its 2008 approval. The EPA's latest proposal characterizes the proposed deletion as an error correction within the meaning of the Clean Air Act. The Company believes this interpretation of the Clean Air Act to be incorrect. If finalized, this proposed action could affect unit availability and result in increased operations and maintenance costs for affected units, including units owned by SEGCO, which is jointly owned with Georgia Power.
On July 6, 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR). CSAPR is an emissions trading program that limits SO2 and nitrogen oxide (NOx) emissions from power plants in two phases ��� Phase 1 in 2015 and Phase 2 in 2017. On October 26, 2016, the EPA published a final rule that updates the CSAPR ozone season NOx program, beginning in 2017, and establishes more stringent ozone-season emissions budgets in Alabama. Alabama is alsoare reflected in the CSAPR annualapplicable Registrants' ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein and Note 6 to the financial statements for additional information.
Environmental Laws and Regulations
Air Quality
The Southern Company system reduced SO2and NOx Xprograms. air emissions by 98% and 88%, respectively, from 1990 to 2018. The Southern Company system reduced mercury air emissions by over 96% from 2005 to 2018.
The EPA finalized regional haze regulations in 2005 with aand 2017. These regulations require states, tribal governments, and various federal agencies to develop and implement plans to reduce pollutants that impair visibility and demonstrate reasonable progress toward the goal of restoring natural visibility conditions in certain areas, (primarilyincluding national parks and wilderness areas)areas. States are required to submit state implementation plans for the second ten-year planning period (2018 through 2028) by 2064. The rule involves the application of best available retrofit technology to certain sources, including fossil fuel-fired generating facilities, built between 1962 and 1977 and any additional emissions reductions necessary for each designated area to achieve reasonable progress toward the natural visibility conditions goal by 2018 and for each 10-year period thereafter. On December 14, 2016, the EPA finalized revisions to the regional haze regulations. These regulations establish a deadline of July 31, 2021 for states to submit revised SIPs to the EPA demonstrating reasonable progress toward the statutory goal of achieving natural background conditions by 2064. State implementation of the reasonable progress requirements defined in this final rule2021. These plans could require further reductions in particulate matter, SO2, and/or NOxX emissions.
In June 2015, the EPA published a final rule requiring certain states (including Alabama) to revise or remove the provisions of their SIPs relating to the regulation of excess emissions at industrial facilities, including fossil fuel-fired generating facilities, during periods of startup, shut-down, or malfunction (SSM).
The Company has developed and continually updates a comprehensive environmental compliance strategy to assess compliance obligations associated with the current and proposed environmental requirements discussed above. These regulations, which could result in significant additional capital expenditures andincreased compliance costs that could affect future unit retirement and replacement decisions and results of operations, cash flows, and financial condition if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of the eight-hour ozone and SO2 NAAQS, Alabama opacity rule, CSAPR, regional haze regulations, and SSM rule will depend on various factors, such as implementation, adoption, or other action at the state level, and the outcome of pending and/or future legal challenges, and cannot be determined at this time.affected electric generating units.
Water Quality
The EPA's final rule establishing standards for reducingIn 2014, the EPA finalized requirements under Section 316(b) of the Clean Water Act (CWA) to regulate cooling water intake structures (CWIS) to minimize their effects on fish and other aquatic life caused by new and existing cooling water intake structures at existing power plantsplants. The regulation requires plant-specific studies to determine applicable CWIS changes to protect organisms. The Southern Company system is conducting these studies and manufacturing facilities became effective in 2014.currently anticipates applicable CWIS changes may include fish-friendly CWIS screens with fish return systems and minor additions of monitoring equipment at certain plants. The effectimpact of this final rule will depend on the resultsoutcome of these plant-specific studies, any additional studies that are currently underway and implementation of the rule by regulators based on site-specific factors.protective measures required to be incorporated into each plant's National Pollutant Discharge Elimination System (NPDES) permits issued after July 14, 2018 must include conditions to implementpermit based on site-specific factors, and ensure compliance with the standards and protective measures required by the rule.outcome of any legal challenges.
In November 2015, the EPA published a finalfinalized the steam electric effluent limitations guidelines (ELG) rule which(2015 ELG Rule) that set national standards for wastewater discharges from new and existing steam electric generating units generating greater than 50 MWs. The 2015 ELG Rule prohibits effluent discharges of certain waste streams and imposes stringent technology-based requirements for certain wastestreams from steam electric power plants.limits on flue gas desulfurization (scrubber) wastewater discharges. The revised2015 technology-based limits and compliance dates will be incorporated into future renewals of NPDES permits at affected unitsthe CCR Rule require extensive changes to existing ash and may requirewastewater management systems or the installation and operation of multiple technologies sufficientnew ash and wastewater management systems. Compliance with the 2015 ELG Rule is expected to ensurerequire capital expenditures and increased operational costs for the traditional electric operating companies' coal-fired electric generation. State environmental agencies will incorporate specific compliance with applicable new numericapplicability dates in the NPDES permitting process for each ELG waste stream. On November 22, 2019, the EPA published a proposed rule that changes certain requirements in the 2015 ELG Rule, including adjusting compliance limits and providing certain exemptions for boilers that are expected to be retired by December 31, 2028 and for low utilization boilers (876,000 MWh/year or less). The proposal also extends the latest applicability date for flue gas desulfurization wastewater compliance limits. Compliance deadlines
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

between November 1, 2018 and December 31, 2023 for bottom ash transport water. The impact of any changes to the 2015 ELG Rule will be established in permits baseddepend on information provided for each applicable wastestream.the content of a new final rule, which the EPA plans to finalize by August 2020, and the outcome of any legal challenges.
Coal Combustion Residuals
In 2015, the EPA and the U.S. Army Corps of Engineers jointly published a final rule revising the regulatory definition of waters of the U.S.finalized non-hazardous solid waste regulations for all Clean Water Act (CWA) programs. The final rule significantly expands the scope of federal jurisdiction under the CWA and could have significant impacts on economic development projects which could affect customer demand growth. In addition, this rule could significantly increase permitting and regulatory requirements and costs associated with the siting of new facilities and the installation, expansion, and maintenance of transmission and distribution lines. The rule became effective in August 2015 but, in October 2015, the U.S. Court of Appeals for the Sixth Circuit issued an order staying implementation of the final rule. The case is held in abeyance pending review by the U.S. Supreme Court of challenges to the U.S. Court of Appeals for the Sixth Circuit's jurisdiction in the case.
These water quality regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. Also, results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of these final rules will depend on various factors, such as pending and/or future legal challenges, compliance dates, and implementation of the rules, and cannot be determined at this time.
Coal Combustion Residuals
The Company currently manages CCR at onsite storage units consisting of landfills and surface impoundments (CCR Units) at six generating plants. In addition to on-site storage, the Company also sells a portion of its CCR to third parties for beneficial reuse. Individual states regulate CCR and the State of Alabama has its own regulatory requirements. The Company has an inspection program in place to assist in maintaining the integrity of its coal ash surface impoundments.
The CCR Rule became effective in October 2015. The CCR Rule regulates the disposal of CCR, including coal ash and gypsum, as non-hazardous solid waste in CCR Unitslandfills and surface impoundments (ash ponds) at active electric generating power plants. The CCR Rule doesrequires landfills and
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

ash ponds to be evaluated against a set of performance criteria and potentially closed if certain criteria are not automatically require closuremet. Closure of existing landfills and ash ponds requires installation of equipment and infrastructure to manage CCR in accordance with the CCR Rule. In addition to the CCR Rule, the States of Alabama and Georgia finalized state regulations regarding the handling of CCR Units but includes minimum criteria for active and inactive surface impoundments containingwithin their respective states. The State of Georgia received approval from the EPA on its partial permit program implementing the state CCR and liquids, lateral expansionspermit program in lieu of existing units, and active landfills. Failure to meet the minimum criteria can resultfederal self-implementing rule in the required closure of a CCR Unit. On December 16, 2016, President Obama signedaccordance with the Water Infrastructure Improvements for the Nation Act (WIIN Act).Act. The WIIN Act allows states to establishState of Alabama also submitted its state CCR program for the EPA's review and approval. The State of Mississippi has not yet developed a state CCR permit programs for implementingprogram.
The EPA is in the process of amending portions of the CCR Rule, ifRule. Most recently, on December 2, 2019, the EPA approvespublished a proposed rule that would require facilities to cease placement of both CCR and non-CCR waste in unlined surface impoundments as soon as technically feasible, no later than August 31, 2020. This proposed rule also includes extensions beyond August 31, 2020, provided that certain conditions are met. Impacts of the program,proposed rule to the Southern Company system are expected to be limited, as the traditional electric operating companies and allows for federal permitsSEGCO stopped sending coal ash from most of the generating units to unlined ponds in April 2019 and EPA enforcement where a state permitting program does not exist.expect to stop sending coal ash from the remaining generating units within the timeframes and associated extensions allowed in the proposed rule.
Based on current cost estimates for closure in place and monitoring primarily related toof landfills and ash ponds pursuant to the CCR Rule, the Southern Company system recorded/revised AROs for each CCR unit in 2015 and has recorded AROscontinued to update these cost estimates and ARO liabilities in subsequent years. The traditional electric operating companies expect to continue updating these estimates periodically as additional information related to ash pond closure methodologies, schedules, and/or costs becomes available. Alabama Power anticipates increasing the CCR Rule. As further analysis is performed, including evaluationARO for one of its ash ponds within the expected methodnext nine months upon completion of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site,a feasibility study and the determination of timing with respect to compliance activities, the Company expects to continue to periodically update these estimates. The Company has posted closure and post-closure care plans to its public website as required by the CCR Rule; however, the ultimate impact of the CCR Rule will depend on the results of initial and ongoing minimum criteria assessmentsrelated cost estimate, and the implementationincrease could be material. Additionally, the closure designs and plans in the States of state or federal permit programs. Costs associated with the CCR RuleAlabama and Georgia are expectedsubject to be recoveredapproval by environmental regulatory agencies. Absent continued recovery of ARO costs through Rate CNP Compliance. The Company'sregulated rates, results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates. See Note 1 to the financial statements under "Asset Retirement Obligationsfor Southern Company and Other Costs of Removal" for additional information regarding the Company's AROs as of December 31, 2016.
Global Climate Issues
In October 2015, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing CO2 emissions from new, modified, and reconstructed units. The other final action, known as the Clean Power Plan, establishes guidelines for states to develop plans to meet EPA-mandated CO2 emission rates or emission reduction goals for existing units. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022 and 2029 and final rates in 2030 and thereafter. At the same time, the EPA published a proposed federal plan and model rule that, when finalized, states can adopt or that would be put in place if a state either does not submit a state plan or its plan is not approved by the EPA. On February 9, 2016, the U.S. Supreme Court granted a stay of the Clean Power Plan, pending disposition of petitions for review with the courts. The stay will remain in effect through the resolution of the litigation, including any review by the U.S. Supreme Court.
These guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. However, the ultimate financial and operational impact of the
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Alabama Power Company 2016 Annual Report

final rules on the Company cannot be determined at this time and will depend upon numerous factors, including the outcome of pending legal challenges, including legal challenges filed by the traditional electric operating companies could be materially impacted. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and any individual state implementation of the EPA's final guidelines in the event the rule is upheldFUTURE EARNINGS POTENTIAL – "Regulatory MattersGeorgia PowerIntegrated Resource Plan" herein and implemented.
In December 2015, partiesNote 6 to the United Nations Framework Convention on Climate Change – including the United States – adopted the Paris Agreement, which establishes a non-binding universal frameworkfinancial statements for addressing greenhouse gas emissions based on nationally determined contributions. It also sets in place a process for tracking progress toward the goals every five years. The ultimate impact of this agreement depends on its implementation by participating countries and cannot be determined at this time.
The EPA's greenhouse gas reporting rule requires annual reporting of greenhouse gas emissions expressed in terms of metric tons of CO2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, the Company's 2015 greenhouse gas emissions were approximately 39 million metric tons of CO2 equivalent. The preliminary estimate of the Company's 2016 greenhouse gas emissions on the same basis is approximately 38 million metric tons of CO2 equivalent. The level of greenhouse gas emissions from year to year will depend on the level of generation, the mix of fuel sources, and other factors.
FERC Matters
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company) and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.information.
The ultimate outcome of these matters cannot be determined at this time.
Retail Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and Southern Company Gas conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in their financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia (which represent substantially all of Southern Company Gas' accrued remediation costs) have all received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. The traditional electric operating companies and Southern Company Gas may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental Remediation" for additional information.
Global Climate Issues
On July 8, 2019, the EPA published the final Affordable Clean Energy rule (ACE Rule) to repeal and replace the CPP. The ACE Rule requires states to develop unit-specific CO2 emission rate standards for existing coal-fired units based on heat-rate efficiency improvements. The ACE Rule is being challenged in the D.C. Circuit Court of Appeals and Georgia Power is an intervenor in the litigation in support of the rule, as are other industry parties. The ultimate impact of the ACE Rule to the Southern Company system will depend on state implementation plan requirements and the outcome of associated legal challenges and cannot be determined at this time.
Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy; however, associated impacts are currently unknown. The Southern Company system has transitioned from an electric generating mix of 70% coal and 15% natural gas in 2007 to a mix of 22% coal and 52% natural gas in 2019, along with over 8,300 MWs of renewable resources. This transition has been supported in part by the Southern Company system retiring over 5,600 MWs of coal- and oil-fired generating capacity since 2010 and converting over 3,400 MWs of generating capacity from coal to natural gas since 2015. In addition, Southern Company Gas has replaced approximately 5,600 miles of bare steel and
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cast-iron pipe, resulting in removal of approximately 2.5 million metric tons of GHG from its natural gas distribution system since 1998.
The following table provides the Registrants' 2018 and preliminary 2019 GHG emissions based on ownership or financial control of facilities:
 2018Preliminary 2019
 
(in million metric tons of CO2 equivalent)
Southern Company(a)(b)
102
88
Alabama Power36
32
Georgia Power30
27
Mississippi Power8
9
Southern Power(b)
14
13
Southern Company Gas(b)
1
1
(a)Includes non-registrant subsidiaries.
(b)The 2018 and preliminary 2019 amounts include GHG emissions attributable to disposed assets through the date of the applicable disposition. See Note 15 to the financial statements for additional information regarding disposition activities.
Based on the preliminary 2019 amount above, the Southern Company system has achieved an estimated GHG emission reduction of 44% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. The Southern Company system's ability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies. The Southern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the use of natural gas for generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to lower GHG emissions. The Southern Company system is also evaluating methods of removing carbon from the atmosphere.
Regulatory Matters
The Company's
Alabama Power
Alabama Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Alabama PSC. The CompanyAlabama Power currently recovers its costs from the regulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to address current events impacting the Company.Alabama Power. See Note 1 to the financial statements and Note 32 to the financial statements under "Retail Regulatory Matters""Alabama Power" for additional information regarding Alabama Power's rate mechanisms and accounting orders.
Petition for Certificate of Convenience and Necessity
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, both as more fully described below, as well as the Autauga Combined Cycle Acquisition. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. This filing was predicated on the results of Alabama Power's 2019 IRP provided to the Alabama PSC, which identified an approximately 2,400-MW resource need for Alabama Power, driven by the need for additional winter reserve capacity. See Note 15 to the financial statements under "Alabama Power" for additional information regarding the Company's rate mechanismsAutauga Combined Cycle Acquisition.
The procurement of these resources is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC. The completion of the Autauga Combined Cycle Acquisition is also subject to approval by the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
On May 8, 2019, Alabama Power entered into an Agreement for Engineering, Procurement, and Construction with Mitsubishi Hitachi Power Systems Americas, Inc. and Black & Veatch Construction, Inc. to construct an approximately 720-MW combined cycle facility at Plant Barry (Plant Barry Unit 8), which is expected to be placed in service by the end of 2023.
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Southern Company and Subsidiary Companies 2019 Annual Report

The capital investment associated with the construction of Plant Barry Unit 8 and the Autauga Combined Cycle Acquisition is currently estimated to total approximately $1.1 billion.
Alabama Power entered into additional long-term PPAs totaling approximately 640 MWs of generating capacity consisting of approximately 240 MWs of combined cycle generation expected to begin later in 2020 and approximately 400 MWs of solar generation coupled with battery energy storage systems (solar/battery systems) expected to begin in 2022 through 2024. The terms of the agreements for the solar/battery systems permit Alabama Power to use the energy and retire the associated renewable energy credits (REC) in service of customers or to sell RECs, separately or bundled with energy.
Upon certification, Alabama Power expects to recover costs associated with Plant Barry Unit 8 pursuant to its Rate CNP New Plant. Additionally, Alabama Power expects to recover costs associated with the Autauga Combined Cycle Acquisition through the inclusion in Rate RSE of revenues from the existing power sales agreement and, on expiration of that agreement, pursuant to Rate CNP New Plant. The recovery of costs associated with laws, regulations, and other such mandates directed at the utility industry are expected to be recovered through Rate CNP Compliance. Alabama Power expects to recover the capacity-related costs associated with the PPAs through its Rate CNP PPA. In addition, fuel and energy-related costs are expected to be recovered through Rate ECR. Any remaining costs associated with the Autauga Combined Cycle Acquisition and Plant Barry Unit 8 will be incorporated through the annual filing of Rate RSE.
The ultimate outcome of these matters cannot be determined at this time.
Construction Work in Progress Accounting Order
On October 1, 2019, the Alabama PSC acknowledged that Alabama Power would begin certain limited preparatory activities associated with Plant Barry Unit 8 construction to meet the target in-service date by authorizing Alabama Power to record the related costs as CWIP prior to the issuance of an order on the CCN petition. Should a CCN not be granted and Alabama Power does not proceed with the related construction of Plant Barry Unit 8, Alabama Power may transfer those costs and any costs that directly result from the non-issuance of the CCN to a regulatory asset which would be amortized over a five-year period. If the balance of incurred costs reaches 5% of the estimated in-service cost of the total project prior to issuance of an order on the CCN petition, Alabama Power will confer with the Alabama PSC regarding the appropriateness of additional authorization. The Sierra Club subsequently filed a petition for reconsideration of the accounting orders.order. The Alabama PSC voted to deny the petition for reconsideration on January 7, 2020.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon the Company'sAlabama Power's projected weighted cost ofcommon equity (WCE)return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If the Company'sAlabama Power's actual retail return is above the allowed WCEWCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCEWCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
In May 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2019, Alabama Power's equity ratio was approximately 50%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, during a year without a Rate RSE upward adjustment, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%. During a year
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


with a Rate RSE upward adjustment, if Alabama Power's actual WCER exceeds 6.15%, customers receive 50% of the amount between 6.15% and 6.90% and all amounts in excess of an actual WCER of 6.90%.
In conjunction with these modifications to Rate RSE, in May 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and to return $50 million to customers through bill credits in 2019.
On December 1, 2016, the CompanyNovember 27, 2019, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2017. The2020. Projected earnings were within the specified range; therefore, retail rates under Rate RSE adjustment was an increaseremain unchanged for 2020.
During 2019, Alabama Power provided to the Alabama PSC and the Alabama Office of 4.48%, or $245 million annually, effective January 1, 2017the Attorney General information related to the operation and includes the performance based adder of 0.07%. Under the termsutilization of Rate RSE, in accordance with the maximum increase for 2018rules governing the operation of Rate RSE. The ultimate outcome of this matter cannot exceed 3.52%.be determined at this time.
As ofAt December 31, 2016, the 2016 retail return2019, Alabama Power's WCER exceeded the allowed WCE range; therefore, the Company established6.15%, resulting in Alabama Power establishing a $73current regulatory liability of $53 million for Rate RSE refund liability. In accordance with an order issued on February 14, 2017 by the Alabama PSC, the Company was directedrefunds, which will be refunded to apply the full amount of the refund to reduce the under recovered balance of customers through bill credits in April 2020.
Rate CNP PPA.New Plant
Rate CNP New Plant allows for recovery of Alabama Power's retail costs associated with newly developed or acquired certificated generating facilities placed into retail service. No adjustments to Rate CNP New Plant occurred during the period 2017 through 2019. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information.
Rate CNP PPA
The Company's retail rates, approved by the Alabama PSC, provide for adjustments to recognize the placing of new generating facilities into retail service under Rate CNP. The Company may also recover retail costs associated with certificated PPAs under Rate CNP PPA. On March 8, 2016, the Alabama PSC issued a consent order that the Company leave in effect the current Rate CNP PPA factor for billings for the period April 1, 2016 through March 31, 2017. No adjustment to Rate CNP PPA is expected in 2017.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, the Company was authorized to eliminate the under recovered balance in Rate CNP PPA at December 31, 2016, which totaled approximately $142 million. As discussed herein under "Rate RSE," the Company will utilize the full amount of its $73 million Rate RSE refund liability to reduce the amount of the Rate CNP PPA under recovery and will reclassify the remaining $69 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of the Company's next depreciation study, which is expected to occur within the next three to five years. The Company's current depreciation study became effective January 1, 2017.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of the Company's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting the Company's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factor that is calculated annually. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in Rate CNP Compliance related operations and maintenance expenses and depreciation generally will have no effect on net income.
On December 6, 2016, the Alabama PSC issued a consent order that the Company leave in effect for 2017 the factors associated with the Company's compliance costs for the year 2016. As stated in the consent order, any under-collected amount for prior years will be deemed recovered before the recovery of any current year amounts. Any under recovered amounts associated with 2017 will be reflected in the 2018 filing.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, the Company is authorized to classify any under recovered balance in Rate CNP Compliance up to approximately $36 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of the Company's next depreciation study, which is expected to occur within the next three to five years. The Company's current depreciation study became effective January 1, 2017.
Rate ECR
The Company has established energy cost recovery rates under the Company's Rate ECR as approved by the Alabama PSC. Rates are based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed give rise to the over or under recovered amounts recorded as regulatory assets or liabilities. The Company, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on the Company's net income, but will impact operating cash flows. Currently, the Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
On December 6, 2016, the Alabama PSC approved a decrease in the Company's Rate ECR factor from 2.030 to 2.015 cents per KWH, equal to 0.15%, or $8 million annually, based upon projected billings, effective January 1, 2017. The approved decrease in the Rate ECR factor will have no significant effect on the Company's net income, but will decrease operating cash flows related to fuel cost recovery in 2017. The rate will return to 5.910 cents per KWH in 2018, absent a further order from the Alabama PSC.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, the Company is authorized to classify any under recovered balance in Rate ECR up to approximately $36 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of the Company's next depreciation study, which is expected to occur within the next three to five years. The Company's current depreciation study became effective January 1, 2017.
Environmental Accounting Order
Based on an order from the Alabama PSC, the Company is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. These costs are being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance. See "Environmental Matters – Environmental Statutes and Regulations" herein for additional information regarding environmental regulations.
In April 2016, as part of its environmental compliance strategy, the Company ceased using coal at Plant Greene County Units 1 and 2 (300 MWs representing the Company's ownership interest) and began operating Units 1 and 2 solely on natural gas in June 2016 and July 2016, respectively. As a result, the Company transferred the unrecovered plant asset balances to a regulatory asset at their respective retirement dates. The regulatory asset will be amortized and recovered through Rate CNP Compliance over the units' remaining useful lives, as established prior to the decision for retirement; therefore, these decisions associated with coal operations had no significant impact on the Company's financial statements.
Renewables
In accordance with the September 2015 Alabama PSC order approving up to 500 MWs of renewable projects, the Company has entered into agreements to purchase power from and to build 89 MWs of renewable generation sources. The terms of the agreements permit the Company to use the energy and retire the associated renewable energy credits (REC) in service of its customers or to sell RECs, separately or bundled with energy.
Income Tax Matters
Bonus Depreciation
In December 2015, the Protecting Americans from Tax Hikes (PATH) Act was signed into law. Bonus depreciation was extended for qualified property placed in service through 2020. The PATH Act allows for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension of bonus depreciation included in the PATH Act is expected to result in approximately $230 million of positive cash flows for the 2016 tax year and approximately $180 million for the 2017 tax year. See Note 5 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Other Matters
The Company is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, the Company is subject to certain claims and legal actions arising in the ordinary course of business. The Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Note 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements. See Note 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Company prepares its financial statements in accordance with GAAP. Significant accounting policies are described in Note 1 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on the Company's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
The Company is subject to retail regulation by the Alabama PSC and wholesale regulation by the FERC. As a result, the Company applies accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on the Company's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the Company; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the Company's results of operations and financial condition than they would on a non-regulated company.
As reflected in Note 1 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the Company's financial statements.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to the decommissioning of the Company's nuclear facility, Plant Farley, and facilities that are subject to the CCR Rule, principally ash ponds. In addition, the Company has retirement obligations related to various landfill sites, underground storage tanks, asbestos removal related to ongoing repair and maintenance, disposal of polychlorinated biphenyls in certain transformers, and disposal of sulfur hexafluoride gas in certain substation breakers. The Company also has identified retirement obligations related to certain transmission and distribution facilities, asbestos containing material within long-term assets not subject to ongoing repair and maintenance activities, and certain wireless communication towers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure in place. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their currently anticipated useful life, the Company expects to continue to periodically update these estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Coal Combustion Residuals" herein for additional information.
Given the significant judgment involved in estimating AROs, the Company considers the liabilities for AROs to be critical accounting estimates.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" and "Nuclear Decommissioning" for additional information.
Pension and Other Postretirement Benefits
The Company's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the Company believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefits costs and obligations.
Key elements in determining the Company's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on the Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. The Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to the Company's target asset allocation. For purposes of determining its liability related to the pension and other postretirement benefit plans, the Company discounts the future related cash flows using a single-point discount rate developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. For 2015 and prior years, the Company computed the interest cost component of its net periodic pension and other postretirement benefit plan expense using the same single-point discount rate. For 2016, the Company adopted a full yield curve approach for calculating the interest cost component whereby the discount rate for each year is applied to the liability for that specific year. As a result, the interest cost component of net periodic pension and other postretirement benefit plan expense decreased by approximately $24 million in 2016.
A 25 basis point change in any significant assumption (discount rate, salaries, or long-term return on plan assets) would result in an $8 million or less change in total annual benefit expense and a $105 million or less change in projected obligations.
The Company recorded pension costs of $11 million in 2016, $48 million in 2015, and $23 million in 2014. Postretirement benefit costs for the Company were $4 million, $5 million, and $4 million in 2016, 2015, and 2014, respectively. Such amounts are dependent on several factors including trust earnings and changes to the plans. A portion of pension and other postretirement benefit costs is capitalized based on construction-related labor charges. Pension and other postretirement benefit costs are a component of the regulated rates and generally do not have a long-term effect on net income.
See Note 2 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations
The Company is subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Note 3 to the financial statements for more information regarding certain of these contingencies. The Company periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect the Company's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity supplied and billed in that period
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

(including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Notes 5, 8, and 12 to the financial statements for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
FINANCIAL CONDITION AND LIQUIDITY
Overview
The Company's financial condition remained stable at December 31, 2016. The Company's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. Capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units, to expand and improve transmission and distribution facilities, and for restoration following major storms. Operating cash flows provide a substantial portion of the Company's cash needs. For the three-year period from 2017 through 2019, the Company's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. The Company plans to finance future cash needs in excess of its operating cash flows primarily through debt issuances, borrowings from financial institutions, preferred and preference stock issuances, or capital contributions from Southern Company. The Company intends to continue to monitor its access to short-term and long-term capital markets as well as its bank credit
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," and "Capital Requirements and Contractual Obligations" herein for additional information.
The Company's investments in the qualified pension plan and the nuclear decommissioning trust funds increased in value as of December 31, 2016 as compared to December 31, 2015. On December 19, 2016, the Company voluntarily contributed $129 million to the qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated during 2017. The Company's funding obligations for the nuclear decommissioning trust fund are based on the most recent site study, and the next study is expected to be conducted in 2018. See Notes 1 and 2 to the financial statements under "Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
Net cash provided from operating activities totaled $1.9 billion for 2016, a decrease of $193 million as compared to 2015. The decrease in cash provided from operating activities was primarily due to the collection of fuel cost recovery revenues and the voluntary contribution to the qualified pension plan, partially offset by the timing of income tax payments and refunds associated with bonus depreciation. Net cash provided from operating activities totaled $2.1 billion for 2015, an increase of $433 million as compared to 2014. The increase in cash provided from operating activities was primarily due to the timing of income tax payments and refunds associated with bonus depreciation and collection of fuel cost recovery revenues, partially offset by the timing of payment of accounts payable.
Net cash used for investing activities totaled $1.4 billion for 2016, $1.5 billion for 2015, and $1.6 billion for 2014. These activities were primarily related to gross property additions for distribution, environmental, transmission, and steam generation assets. In 2014, these activities also related to gross property additions for nuclear fuel assets.
Net cash used for financing activities totaled $285 million in 2016 primarily due to the payment of common stock dividends and a redemption of long-term debt, partially offset by issuances of long-term debt and additional capital contributions from Southern Company. Net cash used for financing activities totaled $733 million in 2015 primarily due to the payment of common stock dividends and redemptions of securities, partially offset by issuances of long-term debt. Fluctuations in cash flow from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Significant balance sheet changes for 2016 included an increase of $905 million in property, plant, and equipment primarily due to additions to environmental, steam generation, distribution, and transmission facilities, an increase of $413 million in accumulated deferred income taxes primarily as a result of bonus depreciation, and an increase of $361 million in securities due within one year. Other significant changes include a decrease of $310 million in construction work in progress primarily due to environmental equipment related to steam generation facilities being placed in service.
The Company's ratio of common equity to total capitalization plus short-term debt was 46.2% and 45.6% at December 31, 2016 and 2015, respectively. See Note 6 to the financial statements for additional information.
Sources of Capital
The Company plans to obtain the funds to meet its future capital needs from sources similar to those used in the past, which were primarily from operating cash flows, short-term debt, term loans, external security issuances, and equity contributions from Southern Company. However, the amount, type, and timing of any future financings, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors.
Security issuances are subject to regulatory approval by the Alabama PSC. Additionally, with respect to the public offering of securities, the Company files registration statements with the SEC under the Securities Act of 1933, as amended. The amounts of securities authorized by the Alabama PSC are continuously monitored and appropriate filings are made to ensure flexibility in the capital markets.
The Company obtains financing separately without credit support from any affiliate. See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of the Company are not commingled with funds of any other company in the Southern Company system.
At December 31, 2016, the Company's current liabilities exceeded current assets by $0.1 billion. The Company's current liabilities sometimes exceed current assets because of long-term debt maturities and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

At December 31, 2016, the Company had approximately $420 million of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2016 were as follows:
Expires     Expires Within One Year
2017 2018 2020 Total Unused Term Out No Term Out
(in millions) (in millions) (in millions)
$35
 $500
 $800
 $1,335
 $1,335
 $
 $35
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
Most of these bank credit arrangements, as well as the Company's term loan arrangements, contain covenants that limit debt levels and contain cross acceleration provisions to other indebtedness (including guarantee obligations) of the Company. Such cross acceleration provisions to other indebtedness would trigger an event of default if the Company defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2016, the Company was in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
Subject to applicable market conditions, the Company expects to renew or replace its bank credit arrangements as needed, prior to expiration. In connection therewith, the Company may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
A portion of the unused credit with banks is allocated to provide liquidity support to the Company's pollution control revenue bonds and commercial paper programs. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support was $890 million as of December 31, 2016. In addition, at December 31, 2016, the Company had $87 million of fixed rate pollution control revenue bonds outstanding that were required to be remarketed within the next 12 months.
The Company also has substantial cash flow from operating activities and access to the capital markets, including a commercial paper program, to meet liquidity needs. The Company may meet short-term cash needs through its commercial paper program. The Company may also meet short-term cash needs through a Southern Company subsidiary organized to issue and sell commercial paper at the request and for the benefit of the Company and the other traditional electric operating companies. Proceeds from such issuances for the benefit of the Company are loaned directly to the Company. The obligations of each traditional electric operating company under these arrangements are several and there is no cross-affiliate credit support.
The Company had no short-term borrowings outstanding at December 31, 2016, 2015, and 2014. Details of commercial paper borrowings were as follows:
 
Short-term Debt During the Period (*)
 
Average
Amount Outstanding
 
Weighted
Average
Interest
Rate
 
Maximum
Amount
Outstanding
 (in millions)   (in millions)
      
December 31, 2016$16
 0.6% $200
December 31, 2015$14
 0.2% $100
December 31, 2014$13
 0.2% $300
(*)Average and maximum amounts are based upon daily balances during the twelve-month periods ended December 31, 2016, 2015, and 2014.
The Company believes that the need for working capital can be adequately met by utilizing commercial paper programs, lines of credit, and operating cash flows.
Financing Activities
In January 2016, the Company issued $400 million aggregate principal amount of Series 2016A 4.30% Senior Notes due January 2, 2046. The proceeds were used to repay at maturity $200 million aggregate principal amount of the Company's Series FF 5.20% Senior Notes due January 15, 2016 and for general corporate purposes, including the Company's continuous construction program.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

In March 2016, the Company entered into three bank term loan agreements with maturity dates of March 2021, in an aggregate principal amount of $45 million, one of which bears interest at 2.38% per annum and two of which bear interest based on three-month LIBOR.
Subsequent to December 31, 2016, the Company repaid at maturity $200 million aggregate principal amount of its Series 2007A 5.55% Senior Notes due February 1, 2017.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Company plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
At December 31, 2016, the Company did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change to BBB and/or Baa2 or below. These contracts are primarily for physical electricity purchases, fuel purchases, fuel transportation and storage, energy price risk management, and transmission.
The maximum potential collateral requirements under these contracts at December 31, 2016 were as follows:
Credit Ratings
Maximum Potential
Collateral
Requirements
 (in millions)
At BBB and/or Baa2$1
At BBB- and/or Baa3$2
Below BBB- and/or Baa3$332
Included in these amounts are certain agreements that could require collateral in the event that either the Company or Georgia Power has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of the Company to access capital markets and would be likely to impact the cost at which it does so.
On January 10, 2017, S&P revised its consolidated credit rating outlook for Southern Company (including the Company) from negative to stable.
Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, the Company continues to have limited exposure to market volatility in interest rates, commodity fuel prices, and prices of electricity. To manage the volatility attributable to these exposures, the Company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to changes in interest rates, the Company may enter into derivatives designated as hedges. The weighted average interest rate on $1.1 billion of long-term variable interest rate exposure at January 1, 2017 was 1.38%. If the Company sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $11 million at January 1, 2017. See Note 1 to the financial statements under "Financial Instruments" and Note 11 to the financial statements for additional information.
To mitigate residual risks relative to movements in electricity prices, the Company enters into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and financial hedge contracts for natural gas purchases. The Company continues to manage a retail fuel-hedging program implemented per the guidelines of the Alabama PSC. The Company had no material change in market risk exposure for the year ended December 31, 2016 when compared to the year ended December 31, 2015.
In addition, Rate ECR allows the recovery of specific costs associated with the sales of natural gas that become necessary due to operating considerations at the Company's electric generating facilities. Rate ECR also allows recovery of the cost of financial
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

instruments used for hedging market price risk up to 75% of the budgeted annual amount of natural gas purchases. The Company may not engage in natural gas hedging activities that extend beyond a rolling 42-month window. Also, the premiums paid for natural gas financial options may not exceed 5% of the Company's natural gas budget for that year.
The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2016
Changes
 
2015
Changes
 Fair Value
 (in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net$(54) $(52)
Contracts realized or settled39
 41
Current period changes(*)
27
 (43)
Contracts outstanding at the end of the period, assets (liabilities), net$12
 $(54)
(*)Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts, for the years ended December 31 were as follows:
 2016 2015
 mmBtu Volume
 (in millions)
Commodity – Natural gas swaps68
 44
Commodity – Natural gas options6
 6
Total hedge volume74
 50
The weighted average swap contract cost below market prices was approximately $0.14 per mmBtu as of December 31, 2016 and above market prices was approximately $1.13 per mmBtu as of December 31, 2015. The change in option fair value is primarily attributable to the volatility of the market and the underlying change in the natural gas price. Substantially all of the natural gas hedge gains and losses are recovered through the Company's retail energy cost recovery clause.
At December 31, 2016 and 2015, substantially all of the Company's energy-related derivative contracts were designated as regulatory hedges and were related to the Company's fuel-hedging program. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the energy cost recovery clause. Certain other gains and losses on energy-related derivatives, designated as cash flow hedges, are initially deferred in OCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred and were not material for any year presented.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

The Company uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 10 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts, which are all Level 2 of the fair value hierarchy, at December 31, 2016 were as follows:
   Fair Value Measurements
   December 31, 2016
 Total Maturity
 Fair Value  Year 1  Years 2&3
 (in millions)
Level 1$
 $
 $
Level 212
 8
 4
Level 3
 
 
Fair value of contracts outstanding at end of period$12
 $8
 $4
The Company is exposed to market price risk in the event of nonperformance by counterparties to energy-related and interest rate derivative contracts. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Company does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 11 to the financial statements.
Capital Requirements and Contractual Obligations
The construction program of the Company is currently estimated to total $1.9 billion for 2017, $1.6 billion for 2018, $1.2 billion for 2019, $1.2 billion for 2020, and $1.2 billion for 2021. The construction program includes capital expenditures related to contractual purchase commitments for nuclear fuel and capital expenditures covered under long-term service agreements. Estimated capital expenditures to comply with environmental statutes and regulations included in these amounts are $0.5 billion for 2017, $0.3 billion for 2018, $0.1 billion for 2019, $0.1 billion for 2020, and $0.2 billion for 2021. These estimated expenditures do not include any potential compliance costs that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from new, existing, modified, or reconstructed fossil-fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" and "– Global Climate Issues" herein for additional information.
The Company also anticipates costs associated with closure in place and monitoring of ash ponds in accordance with the CCR Rule, which are reflected in the Company's ARO liabilities. These costs, which could change as the Company continues to refine its assumptions underlying the cost estimates and evaluate the method and timing of compliance activities, are estimated to be $31 million, $26 million, $100 million, $105 million, and $107 million for the years 2017, 2018, 2019, 2020, and 2021, respectively. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information. Costs associated with the CCR Rule are expected to be recovered through Rate CNP Compliance.
The construction program is subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental statutes and regulations; the outcome of any legal challenges to the environmental rules; changes in generating plants, including unit retirements and replacements and adding or changing fuel sources at existing generating units, to meet regulatory requirements; changes in the expected environmental compliance program; changes in FERC rules and regulations; Alabama PSC approvals; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered.
As a result of NRC requirements, the Company has external trust funds for nuclear decommissioning costs; however, the Company currently has no additional funding requirements. For additional information, see Note 1 to the financial statements under "Nuclear Decommissioning."
In addition, as discussed in Note 2 to the financial statements, the Company provides postretirement benefits to substantially all employees and funds trusts to the extent required by the Alabama PSC and the FERC.
Other funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, pension and other postretirement benefit plans, preferred and preference stock dividends, leases,
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

and other purchase commitments are detailed in the contractual obligations table that follows. See Notes 1, 2, 6, 7, and 11 to the financial statements for additional information.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

Contractual Obligations
Contractual obligations at December 31, 2016 were as follows:
 2017 
2018-
2019
 
2020-
2021
 
After
2021
 Total
 (in millions)
Long-term debt(a) —
         
Principal$561
 $200
 $560
 $5,827
 $7,148
Interest290
 521
 492
 4,013
 5,316
Preferred and preference stock dividends(b)
17
 35
 35
 
 87
Financial derivative obligations(c)
5
 4
 
 
 9
Operating leases(d)
14
 20
 16
 10
 60
Capital Lease1
 1
 1
 3
 6
Purchase commitments —         
Capital(e)
1,782
 2,554
 2,185
 
 6,521
Fuel(f)
1,069
 1,404
 631
 355
 3,459
Purchased power(g)
81
 174
 189
 722
 1,166
Other(h)
44
 86
 52
 274
 456
Pension and other postretirement benefit plans(i)
19
 38
 
 
 57
Total$3,883
 $5,037
 $4,161
 $11,204
 $24,285
(a)All amounts are reflected based on final maturity dates. The Company plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates as of January 1, 2017, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk.
(b)Preferred and preference stock do not mature; therefore, amounts are provided for the next five years only.
(c)Includes derivative liabilities related to cash flow hedges of forecasted debt, as well as energy-related derivatives. For additional information, see Notes 1 and 11 to the financial statements.
(d)Excludes PPAs that are accounted for as leases and are included in purchased power.
(e)The Company provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel and capital expenditures covered under long-term service agreements which are reflected in "Fuel" and "Other," respectively. At December 31, 2016, purchase commitments were outstanding in connection with the construction program. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" herein for additional information.
(f)Includes commitments to purchase coal, nuclear fuel, and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the New York Mercantile Exchange future prices at December 31, 2016.
(g)Estimated minimum long-term obligations for various long-term commitments for the purchase of capacity and energy. Amounts are related to the Company's certificated PPAs which include MWs purchased from gas-fired and wind-powered facilities.
(h)Includes long-term service agreements and contracts for the procurement of limestone. Long-term service agreements include price escalation based on inflation indices.
(i)The Company forecasts contributions to the pension and other postretirement benefit plans over a three-year period. The Company anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from the Company's corporate assets. See Note 2 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from the Company's corporate assets.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

Cautionary Statement Regarding Forward-Looking Statements
The Company's 2016 Annual Report contains forward-looking statements. Forward-looking statements include, among other things, statements concerning regulated rates, customer and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plan, postretirement benefit plans, and nuclear decommissioning trust fund contributions, financing activities, filings with state and federal regulatory authorities, impact of the PATH Act, federal income tax benefits, estimated sales and purchases under power sale and purchase agreements, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impact of recent and future federal and state regulatory changes, including environmental laws regulating emissions, discharges, and disposal to air, water, and land, and also changes in tax and other laws and regulations to which the Company is subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
the effects, extent, and timing of the entry of additional competition in the markets in which the Company operates;
variations in demand for electricity, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources such as self-generation and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of fuels;
effects of inflation;
the ability to control costs and avoid cost overruns during the development and construction of facilities, to construct facilities in accordance with the requirements of permits and licenses, and to satisfy any environmental performance standards;
investment performance of the Company's employee and retiree benefit plans and nuclear decommissioning trust funds;
advances in technology;
state and federal rate regulations and the impact of pending and future rate cases and negotiations, including rate actions relating to fuel and other cost recovery mechanisms;
the inherent risks involved in operating nuclear generating facilities, including environmental, health, regulatory, natural disaster, terrorism, and financial risks;
the ability to successfully operate generating, transmission, and distribution facilities and the successful performance of necessary corporate functions;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to the Company;
the ability of counterparties of the Company to make payments as and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Company's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;
changes in the Company's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general;
the ability of the Company to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama Power Company 2016 Annual Report

catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;
the direct or indirect effects on the Company's business resulting from incidents affecting the U.S. electric grid or operation of generating resources;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (including the Form 10-K) filed by the Company from time to time with the SEC.
The Company expressly disclaims any obligation to update any forward-looking statements.

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STATEMENTS OF INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Alabama Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Revenues:     
Retail revenues$5,322
 $5,234
 $5,249
Wholesale revenues, non-affiliates283
 241
 281
Wholesale revenues, affiliates69
 84
 189
Other revenues215
 209
 223
Total operating revenues5,889
 5,768
 5,942
Operating Expenses:     
Fuel1,297
 1,342
 1,605
Purchased power, non-affiliates166
 171
 185
Purchased power, affiliates168
 180
 200
Other operations and maintenance1,510
 1,501
 1,468
Depreciation and amortization703
 643
 603
Taxes other than income taxes380
 368
 356
Total operating expenses4,224
 4,205
 4,417
Operating Income1,665
 1,563
 1,525
Other Income and (Expense):     
Allowance for equity funds used during construction28
 60
 49
Interest expense, net of amounts capitalized(302) (274) (255)
Other income (expense), net(21) (32) (7)
Total other income and (expense)(295) (246) (213)
Earnings Before Income Taxes1,370
 1,317
 1,312
Income taxes531
 506
 512
Net Income839
 811
 800
Dividends on Preferred and Preference Stock17
 26
 39
Net Income After Dividends on Preferred and Preference Stock$822
 $785
 $761
The accompanying notes are an integral part of these financial statements.

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STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Alabama Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Net Income$839
 $811
 $800
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(1), $(3), and $(3), respectively(2) (5) (5)
Reclassification adjustment for amounts included in net income,
net of tax of $2, $1, and $1, respectively
4
 2
 2
Total other comprehensive income (loss)2
 (3) (3)
Comprehensive Income$841
 $808
 $797
The accompanying notes are an integral part of these financial statements.
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STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2016, 2015, and 2014
Alabama Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Activities:     
Net income$839
 $811
 $800
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total844
 780
 724
Deferred income taxes407
 388
 270
Allowance for equity funds used during construction(28) (60) (49)
Pension, postretirement, and other employee benefits(27) 20
 (61)
Pension and postretirement funding(133) 
 
Other deferred charges – affiliated(50) 
 
Other, net(25) (5) 29
Changes in certain current assets and liabilities —     
-Receivables94
 (160) (58)
-Fossil fuel stock34
 28
 61
-Other current assets(33) 12
 (29)
-Accounts payable73
 3
 157
-Accrued taxes93
 138
 (199)
-Retail fuel cost over recovery(162) 191
 5
-Other current liabilities23
 (4) 59
Net cash provided from operating activities1,949
 2,142
 1,709
Investing Activities:     
Property additions(1,272) (1,367) (1,457)
Nuclear decommissioning trust fund purchases(352) (439) (245)
Nuclear decommissioning trust fund sales351
 438
 244
Cost of removal net of salvage(94) (71) (77)
Change in construction payables(37) (15) (10)
Other investing activities(34) (34) (22)
Net cash used for investing activities(1,438) (1,488) (1,567)
Financing Activities:     
Proceeds —     
Senior notes400
 975
 400
Pollution control revenue bonds
 80
 254
Other long-term debt45
 
 
Capital contributions from parent company260
 22
 28
Redemptions and repurchases —     
Senior notes(200) (650) 
Preferred and preference stock
 (412) 
Pollution control revenue bonds
 (134) (254)
Payment of common stock dividends(765) (571) (550)
Other financing activities(25) (43) (42)
Net cash used for financing activities(285) (733) (164)
Net Change in Cash and Cash Equivalents226
 (79) (22)
Cash and Cash Equivalents at Beginning of Year194
 273
 295
Cash and Cash Equivalents at End of Year$420
 $194
 $273
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $11, $22, and $18 capitalized, respectively)$277
 $250
 $231
Income taxes (net of refunds)(108) 121
 436
Noncash transactions — accrued property additions at year-end84
 121
 8
The accompanying notes are an integral part of these financial statements.
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BALANCE SHEETS
At December 31, 2016 and 2015
Alabama Power Company 2016 Annual Report
Assets2016
 2015
 (in millions)
Current Assets:   
Cash and cash equivalents$420
 $194
Receivables —   
Customer accounts receivable348
 375
Unbilled revenues146
 119
Income taxes receivable, current
 142
Other accounts and notes receivable27
 20
Affiliated40
 50
Accumulated provision for uncollectible accounts(10) (10)
Fossil fuel stock205
 239
Materials and supplies435
 398
Prepaid expenses34
 83
Other regulatory assets, current149
 182
Other current assets11
 9
Total current assets1,805
 1,801
Property, Plant, and Equipment:   
In service26,031
 24,750
Less accumulated provision for depreciation9,112
 8,736
Plant in service, net of depreciation16,919
 16,014
Nuclear fuel, at amortized cost336
 363
Construction work in progress491
 801
Total property, plant, and equipment17,746
 17,178
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries66
 71
Nuclear decommissioning trusts, at fair value792
 737
Miscellaneous property and investments112
 96
Total other property and investments970
 904
Deferred Charges and Other Assets:   
Deferred charges related to income taxes525
 522
Deferred under recovered regulatory clause revenues150
 99
Other regulatory assets, deferred1,157
 1,114
Other deferred charges and assets163
 103
Total deferred charges and other assets1,995
 1,838
Total Assets$22,516
 $21,721
The accompanying notes are an integral part of these financial statements.

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BALANCE SHEETS
At December 31, 2016 and 2015
Alabama Power Company 2016 Annual Report
Liabilities and Stockholder's Equity2016
 2015
 (in millions)
Current Liabilities:   
Securities due within one year$561
 $200
Accounts payable —   
Affiliated297
 278
Other433
 410
Customer deposits88
 88
Accrued taxes —   
Accrued income taxes45
 
Other accrued taxes42
 38
Accrued interest78
 73
Accrued compensation193
 175
Other regulatory liabilities, current85
 240
Other current liabilities76
 93
Total current liabilities1,898
 1,595
Long-Term Debt (See accompanying statements)
6,535
 6,654
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes4,654
 4,241
Deferred credits related to income taxes65
 70
Accumulated deferred investment tax credits110
 118
Employee benefit obligations300
 388
Asset retirement obligations1,503
 1,448
Other cost of removal obligations684
 722
Other regulatory liabilities, deferred100
 136
Other deferred credits and liabilities63
 76
Total deferred credits and other liabilities7,479
 7,199
Total Liabilities15,912
 15,448
Redeemable Preferred Stock (See accompanying statements)
85
 85
Preference Stock (See accompanying statements)
196
 196
Common Stockholder's Equity (See accompanying statements)
6,323
 5,992
Total Liabilities and Stockholder's Equity$22,516
 $21,721
Commitments and Contingent Matters (See notes)

 
The accompanying notes are an integral part of these financial statements.

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STATEMENTS OF CAPITALIZATION
At December 31, 2016 and 2015
Alabama Power Company 2016 Annual Report
 2016
 2015
 2016
 2015
 (in millions) (percent of total)
Long-Term Debt:       
Long-term debt payable to affiliated trusts —       
Variable rate (3.95% at 1/1/17) due 2042$206
 $206
    
Long-term notes payable —       
5.20% due 2016
 200
    
5.50% to 5.55% due 2017525
 525
    
5.125% due 2019200
 200
    
3.375% due 2020250
 250
    
2.38% to 3.95% due 2021220
 200
    
2.80% to 6.125% due 2022-20464,625
 4,225
    
Variable rates (1.87% to 2.10% at 1/1/17) due 202125
 
    
Total long-term notes payable5,845
 5,600
    
Other long-term debt —       
Pollution control revenue bonds —       
0.65% to 1.65% due 2034207
 287
    
Variable rates (0.77% to 0.79% at 1/1/17) due 201736
 36
    
Variable rates (0.82% to 0.86% at 1/1/17) due 202165
 65
    
Variable rates (0.77% to 0.82% at 1/1/17) due 2024-2038788
 709
    
Total other long-term debt1,096
 1,097
    
Capitalized lease obligations4
 5
    
Unamortized debt premium (discount), net(9) (9)    
Unamortized debt issuance expense(46) (45)    
Total long-term debt (annual interest requirement — $290 million)7,096
 6,854
    
Less amount due within one year561
 200
    
Long-term debt excluding amount due within one year6,535
 6,654
 49.7% 51.4%
Redeemable Preferred Stock:       
Cumulative redeemable preferred stock       
$100 par or stated value — 4.20% to 4.92%       
Authorized — 3,850,000 shares       
Outstanding — 475,115 shares48
 48
    
$1 par value — 5.83%       
Authorized — 27,500,000 shares       
Outstanding — 1,520,000 shares: $25 stated value       
(annual dividend requirement — $4 million)37
 37
    
Total redeemable preferred stock85
 85
 0.7
 0.7
Preference Stock:       
Authorized — 40,000,000 shares       
Outstanding — $1 par value — 6.45% to 6.50%       
 — 8,000,000 shares (non-cumulative): $25 stated value       
(annual dividend requirement — $13 million)196
 196
 1.5 1.5
Common Stockholder's Equity:       
Common stock, par value $40 per share —       
Authorized — 40,000,000 shares       
Outstanding — 30,537,500 shares1,222
 1,222
    
Paid-in capital2,613
 2,341
    
Retained earnings2,518
 2,461
    
Accumulated other comprehensive loss(30) (32)    
Total common stockholder's equity6,323
 5,992
 48.1
 46.4
Total Capitalization$13,139
 $12,927
 100.0% 100.0%
The accompanying notes are an integral part of these financial statements.
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STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2016, 2015, and 2014
Alabama Power Company 2016 Annual Report
 
Number of
Common
Shares
Issued
 
Common
Stock
 
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Income (Loss)
 Total
 (in millions)
Balance at December 31, 201331
 $1,222
 $2,262
 $2,044
 $(26) $5,502
Net income after dividends on preferred
and preference stock

 
 
 761
 
 761
Capital contributions from parent company
 
 42
 
 
 42
Other comprehensive income (loss)
 
 
 
 (3) (3)
Cash dividends on common stock
 
 
 (550) 
 (550)
Balance at December 31, 201431
 1,222
 2,304
 2,255
 (29) 5,752
Net income after dividends on preferred
and preference stock

 
 
 785
 
 785
Capital contributions from parent company
 
 37
 
 
 37
Other comprehensive income (loss)
 
 
 
 (3) (3)
Cash dividends on common stock
 
 
 (571) 
 (571)
Other
 
 
 (8) 
 (8)
Balance at December 31, 201531
 1,222
 2,341
 2,461
 (32) 5,992
Net income after dividends on preferred
and preference stock

 
 
 822
 
 822
Capital contributions from parent company
 
 272
 
 
 272
Other comprehensive income (loss)
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (765) 
 (765)
Balance at December 31, 201631
 $1,222
 $2,613
 $2,518
 $(30) $6,323
The accompanying notes are an integral part of these financial statements.

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NOTES TO FINANCIAL STATEMENTS
Alabama Power Company 2016 Annual Report




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Alabama Power Company 2016 Annual Report

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
Alabama Power Company (the Company) is a wholly-owned subsidiary of Southern Company, which is the parent company of the Company and three other traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SCS, Southern LINC, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure, Inc. (PowerSecure) (as of May 9, 2016), and other direct and indirect subsidiaries. The traditional electric operating companies – the Company, Georgia Power, Gulf Power, and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. The Company provides electric service to retail and wholesale customers within its traditional service territory located in the State of Alabama in addition to wholesale customers in the Southeast. Southern Power constructs, acquires, owns, and manages generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through utilities in seven states and is involved in several other complementary businesses including gas marketing services, wholesale gas services, and gas midstream operations. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern LINC provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cable services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants, including the Company's Plant Farley. PowerSecure is a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure.
The equity method is used for subsidiaries in which the Company has significant influence but does not control and for variable interest entities (VIEs) where the Company has an equity investment, but is not the primary beneficiary.
The Company is subject to regulation by the FERC and the Alabama PSC. As such, the Company's financial statements reflect the effects of rate regulation in accordance with GAAP and comply with the accounting policies and practices prescribed by its regulatory commissions. The preparation of financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates. Certain prior years' data presented in the financial statements have been reclassified to conform to the current year presentation.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition,
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Alabama Power Company 2016 Annual Report

measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Notes 5, 8, and 12 for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
Affiliate Transactions
The Company has an agreement with SCS under which the following services are rendered to the Company at direct or allocated cost: general and design engineering, operations, purchasing, accounting, finance and treasury, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, and other services with respect to business and operations, construction management, and power pool transactions. Costs for these services amounted to $460 million, $438 million, and $400 million during 2016, 2015, and 2014, respectively. Cost allocation methodologies used by SCS prior to the repeal of the Public Utility Holding Company Act of 1935, as amended, were approved by the SEC. Subsequently, additional cost allocation methodologies have been reported to the FERC and management believes they are reasonable. The FERC permits services to be rendered at cost by system service companies.
The Company has an agreement with Southern Nuclear under which the following nuclear-related services are rendered to the Company at cost: general executive and advisory services, general operations, management and technical services, administrative services including procurement, accounting, employee relations, systems and procedures services, strategic planning and budgeting services, and other services with respect to business and operations. Costs for these services amounted to $249 million, $243 million, and $234 million during 2016, 2015, and 2014, respectively.
The Company jointly owns Plant Greene County with Mississippi Power. The Company has an agreement with Mississippi Power under which the Company operates Plant Greene County, and Mississippi Power reimburses the Company for its proportionate share of non-fuel expenses, which totaled $13 million in 2016, $11 million in 2015, and $13 million in 2014. Mississippi Power also reimbursed the Company for any direct fuel purchases delivered from one of the Company's transfer facilities. There were no fuel purchases in 2016. Fuel purchases were $8 million and $34 million in 2015 and 2014, respectively. See Note 4 for additional information.
The Company has an agreement with Gulf Power under which the Company made transmission system upgrades to ensure firm delivery of energy under a non-affiliate PPA from a combined cycle plant located in Autauga County, Alabama. Under a related tariff, the Company received $12 million in 2016, $14 million in 2015, and $12 million in 2014 and expects to recover a total of approximately $73 million from 2017 through 2023 from Gulf Power.
On September 1, 2016, Southern Company Gas acquired a 50% equity interest in Southern Natural Gas Company, L.L.C. (SNG). Prior to completion of the acquisition, SCS, as agent for the Company, had entered into a long-term interstate natural gas transportation agreement with SNG. The interstate transportation service provided to the Company by SNG pursuant to this
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Alabama Power Company 2016 Annual Report

agreement is governed by the terms and conditions of SNG's natural gas tariff and is subject to FERC regulation. For the period subsequent to Southern Company Gas' investment in SNG through December 31, 2016, transportation costs under this agreement were approximately $2 million.
The Company provides incidental services to and receives such services from other Southern Company subsidiaries which are generally minor in duration and amount. Except as described herein, the Company neither provided nor received any material services to or from affiliates in 2016, 2015, or 2014.
Also, see Note 4 for information regarding the Company's ownership in a PPA and a gas pipeline ownership agreement with SEGCO.
The traditional electric operating companies, including the Company and Southern Power, may jointly enter into various types of wholesale energy, natural gas, and certain other contracts, either directly or through SCS as agent. Each participating company may be jointly and severally liable for the obligations incurred under these agreements. See Note 7 under "Fuel and Purchased Power Agreements" for additional information.
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Alabama Power Company 2016 Annual Report

Regulatory Assets and Liabilities
The Company is subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers through the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
Regulatory assets and (liabilities) reflected in the balance sheets at December 31 relate to:
 2016 2015 Note
 (in millions)  
Retiree benefit plans$947
 $903
 (i,j)
Deferred income tax charges526
 522
 (a,k)
Under/(over) recovered regulatory clause revenues76
 (97) (d)
Nuclear outage70
 53
 (d)
Remaining net book value of retired assets69
 76
 (l)
Vacation pay69
 66
 (c,j)
Loss on reacquired debt68
 75
 (b)
Other regulatory assets50
 53
 (f)
Asset retirement obligations12
 (40) (a)
Fuel-hedging losses1
 55
 (e,j)
Other cost of removal obligations(684) (722) (a)
Natural disaster reserve(69) (75) (h)
Deferred income tax credits(65) (70) (a)
Other regulatory liabilities(23) (8) (e,g)
Total regulatory assets (liabilities), net$1,047
 $791
  
Note: The recovery and amortization periods for these regulatory assets and (liabilities) are as follows:
(a)Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 50 years. Asset retirement and other cost of removal assets and liabilities will be settled and trued up following completion of the related activities.
(b)Recovered over the remaining life of the original issue, which may range up to 50 years.
(c)Recorded as earned by employees and recovered as paid, generally within one year. This includes both vacation and banked holiday pay.
(d)Recorded and recovered or amortized as approved or accepted by the Alabama PSC over periods not exceeding 10 years. See Note 3 under "Retail Regulatory Matters" for additional information.
(e)Fuel-hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three and a half years. Upon final settlement, actual costs incurred are recovered through the energy cost recovery clause.
(f)Comprised of components including generation site selection/evaluation costs, PPA capacity (to be recovered over the next 12 months), and other miscellaneous assets. Recorded as accepted by the Alabama PSC. Capitalized upon initialization of related construction projects, if applicable.
(g)Comprised of components including mine reclamation and remediation liabilities and fuel-hedging gains. Recorded as accepted by the Alabama PSC. Mine reclamation and remediation liabilities will be settled following completion of the related activities.
(h)Utilized as storm restoration and potential reliability-related expenses are incurred, as approved by the Alabama PSC.
(i)Recovered and amortized over the average remaining service period which may range up to 15 years. See Note 2 for additional information.
(j)Not earning a return as offset in rate base by a corresponding asset or liability.
(k)Included in the deferred income tax charges are $16 million for 2016 and $17 million for 2015 for the retiree Medicare drug subsidy, which is recovered and amortized, as approved by the Alabama PSC, over the average remaining service period which may range up to 15 years.
(l)Recorded and amortized as approved by the Alabama PSC for a period up to 11 years.
In the event that a portion of the Company's operations is no longer subject to applicable accounting rules for rate regulation, the Company would be required to write off to income or reclassify to accumulated OCI related regulatory assets and liabilities that are not specifically recoverable through regulated rates. In addition, the Company would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets and liabilities are to be reflected in rates. See Note 3 under "Retail Regulatory Matters" for additional information.
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Alabama Power Company 2016 Annual Report

Revenues
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amount billable under the contract terms. Energy and other revenues are recognized as services are provided. Unbilled revenues related to retail sales are accrued at the end of each fiscal period. Electric rates for the Company include provisions to adjust billings for fluctuations in fuel costs, fuel hedging, the energy component of purchased power costs, and certain other costs. Revenues are adjusted for differences between these actual costs and amounts billed in current regulated rates. Under or over recovered regulatory clause revenues are recorded in the balance sheets and are recovered or returned to customers through adjustments to the billing factors. The Company and the Alabama PSC continuously monitor the under/over recovered balances. The Company files for revised rates as required or when management deems appropriate, depending on the rate. See Note 3 under "Retail Regulatory Matters – Rate ECR" and "Retail Regulatory Matters – Rate CNP Compliance" for additional information.
The Company has a diversified base of customers. No single customer or industry comprises 10% or more of revenues. For all periods presented, uncollectible accounts averaged less than 1% of revenues.
Fuel Costs
Fuel costs are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. Fuel expense also includes the amortization of the cost of nuclear fuel.
Income and Other Taxes
The Company uses the liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. Federal ITCs utilized are deferred and amortized to income over the average life of the related property. Taxes that are collected from customers on behalf of governmental agencies to be remitted to these agencies are presented net on the statements of income.
The Company recognizes tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 5 under "Unrecognized Tax Benefits" for additional information.
Property, Plant, and Equipment
Property, plant, and equipment is stated at original cost less any regulatory disallowances and impairments. Original cost includes: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and cost of equity funds used during construction.
The Company's property, plant, and equipment in service consisted of the following at December 31:
 2016 2015
 (in millions)
Generation$13,551
 $12,820
Transmission3,921
 3,773
Distribution6,707
 6,432
General1,840
 1,713
Plant acquisition adjustment12
 12
Total plant in service$26,031
 $24,750
The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed with the exception of nuclear refueling costs, which are recorded in accordance with specific Alabama PSC orders.
Nuclear Outage Accounting Order
In accordance with an Alabama PSC order, nuclear outage operations and maintenance expenses for the two units at Plant Farley are deferred to a regulatory asset when the charges actually occur and are then amortized over a subsequent 18-month period with the fall outage costs amortization beginning in January of the following year and the spring outage costs amortization beginning in July of the same year.
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Alabama Power Company 2016 Annual Report

Depreciation and Amortization
Depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates, which approximated 3.0% in 2016, 2.9% in 2015, and 3.3% in 2014. Depreciation studies are conducted periodically to update the composite rates and the information is provided to the Alabama PSC and approved by the FERC. When property subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the plant are retired when the related property unit is retired.
In 2016, the Company submitted an updated depreciation study to the FERC and received authorization to use the recommended rates beginning January 2017. The study was also provided to the Alabama PSC. The revised rates will not have a significant impact on depreciation expense in 2017.
Asset Retirement Obligations and Other Costs of Removal
AROs are computed as the present value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. The Company has received accounting guidance from the Alabama PSC allowing the continued accrual of other future retirement costs for long-lived assets that the Company does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as a regulatory liability.
The liability for AROs primarily relates to the decommissioning of the Company's nuclear facility, Plant Farley, and facilities that are subject to the Disposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in April 2015 (CCR Rule), principally ash ponds. In addition, the Company has retirement obligations related to various landfill sites, underground storage tanks, asbestos removal related to ongoing repair and maintenance, disposal of polychlorinated biphenyls in certain transformers, and disposal of sulfur hexafluoride gas in certain substation breakers. The Company also has identified retirement obligations related to certain transmission and distribution facilities, asbestos containing material within long-term assets not subject to ongoing repair and maintenance activities, and certain wireless communication towers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO. The Company will continue to recognize in the statements of income allowed removal costs in accordance with its regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability, as ordered by the Alabama PSC, and are reflected in the balance sheets. See "Nuclear Decommissioning" herein for additional information on amounts included in rates.
Details of the AROs included in the balance sheets are as follows:
 2016  2015 
 (in millions) 
Balance at beginning of year$1,448
  $829
 
Liabilities incurred5
  402
 
Liabilities settled(25)  (3) 
Accretion73
  53
 
Cash flow revisions32
  167
 
Balance at end of year$1,533
  $1,448
 
The increase in liabilities incurred and cash flow revisions in 2016 and 2015 are primarily related to changes in ash pond closure strategy.
The cost estimates for AROs related to the CCR Rule are based on information as of December 31, 2016 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure in place. As further analysis is performed, including
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Alabama Power Company 2016 Annual Report

evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their currently anticipated useful life, the Company expects to continue to periodically update these estimates.
Nuclear Decommissioning
The NRC requires licensees of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. The Company has external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and the Alabama PSC, as well as the IRS. While the Company is allowed to prescribe an overall investment policy to the Funds' managers, the Company and its affiliates are not allowed to engage in the day-to-day management of the Funds or to mandate individual investment decisions. Day-to-day management of the investments in the Funds is delegated to unrelated third party managers with oversight by the management of the Company. The Funds' managers are authorized, within certain investment guidelines, to actively buy and sell securities at their own discretion in order to maximize the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
The Company records the investment securities held in the Funds at fair value, as disclosed in Note 10, as management believes that fair value best represents the nature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value adjustments and realized gains and losses are determined on a specific identification basis.
At December 31, 2016, investment securities in the Funds totaled $790 million, consisting of equity securities of $552 million, debt securities of $208 million, and $30 million of other securities. At December 31, 2015, investment securities in the Funds totaled $734 million, consisting of equity securities of $521 million, debt securities of $191 million, and $22 million of other securities. These amounts exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases.
Sales of the securities held in the Funds resulted in cash proceeds of $351 million, $438 million, and $244 million in 2016, 2015, and 2014, respectively, all of which were reinvested. For 2016, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $76 million, which included $34 million related to unrealized gains on securities held in the Funds at December 31, 2016. For 2015, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $8 million, which included $57 million related to unrealized losses on securities held in the Funds at December 31, 2015. For 2014, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $54 million, which included $19 million related to unrealized gains on securities held in the Funds at December 31, 2014. While the investment securities held in the Funds are reported as trading securities, the Funds continue to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.
Amounts previously recorded in internal reserves are being transferred into the Funds through 2040 as approved by the Alabama PSC. The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. The Company has filed a plan with the NRC designed to ensure that, over time, the deposits and earnings of the Funds will provide the minimum funding amounts prescribed by the NRC.
At December 31, the accumulated provisions for decommissioning were as follows:
 2016 2015
 (in millions)
External trust funds$790
 $734
Internal reserves19
 20
Total$809
 $754
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Alabama Power Company 2016 Annual Report

Site study cost is the estimate to decommission a facility as of the site study year. The estimated costs of decommissioning as of December 31, 2016 based on the most current study performed in 2013 for Plant Farley are as follows:
Decommissioning periods: 
Beginning year2037
Completion year2076
 (in millions)
Site study costs: 
Radiated structures$1,362
Non-radiated structures80
Total site study costs$1,442
The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may vary from the above estimates because of changes in the assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates.
For ratemaking purposes, the Company's decommissioning costs are based on the site study. Significant assumptions used to determine these costs for ratemaking were an inflation rate of 4.5% and a trust earnings rate of 7.0%. The next site study is expected to be conducted in 2018.
Amounts previously contributed to the Funds are currently projected to be adequate to meet the decommissioning obligations. The Company will continue to provide site-specific estimates of the decommissioning costs and related projections of funds in the external trust to the Alabama PSC and, if necessary, would seek the Alabama PSC's approval to address any changes in a manner consistent with NRC and other applicable requirements.
Allowance for Funds Used During Construction
The Company records AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the plant through a higher rate base and higher depreciation. The equity component of AFUDC is not included in calculating taxable income. All current construction costs are included in retail rates. The AFUDC composite rate as of December 31 was 8.4% in 2016, 8.7% in 2015, and 8.8% in 2014. AFUDC, net of income taxes, as a percent of net income after dividends on preferred and preference stock was 4.2% in 2016, 9.3% in 2015, and 7.9% in 2014.
Impairment of Long-Lived Assets and Intangibles
The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. The determination of whether an impairment has occurred is based on either a specific regulatory disallowance or an estimate of undiscounted future cash flows attributable to the assets, as compared with the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by either the amount of regulatory disallowance or by estimating the fair value of the assets and recording a loss if the carrying value is greater than the fair value. For assets identified as held for sale, the carrying value is compared to the estimated fair value less the cost to sell in order to determine if an impairment loss is required. Until the assets are disposed of, their estimated fair value is re-evaluated when circumstances or events change.
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Materials and Supplies
Generally, materials and supplies include the average cost of transmission, distribution, and generating plant materials. Materials are charged to inventory when purchased and then expensed or capitalized to plant, as appropriate, at weighted average cost when installed.
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Alabama Power Company 2016 Annual Report

Fuel Inventory
Fuel inventory includes the average cost of coal, natural gas, oil, transportation, and emissions allowances. Fuel is recorded to inventory when purchased and then expensed, at weighted average cost, as used and recovered by the Company through energy cost recovery rates approved by the Alabama PSC. Emissions allowances granted by the EPA are included in inventory at zero cost.
Financial Instruments
The Company uses derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, and electricity purchases and sales. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (included in "Other") and are measured at fair value. See Note 10 for additional information regarding fair value. Substantially all of the Company's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the Alabama PSC-approved fuel-hedging program result in the deferral of related gains and losses in OCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. Any ineffectiveness arising from cash flow hedges is recognized currently in net income. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the statements of income. Cash flows from derivatives are classified on the statement of cash flows in the same category as the hedged item. See Note 11 for additional information regarding derivatives.
Beginning in 2016, the Company offsets fair value amounts recognized for multiple derivative instruments executed with the same counterparty under a netting arrangement. Additionally, the Company had no outstanding collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2016.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company has established controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income, changes in the fair value of qualifying cash flow hedges, and reclassifications for amounts included in net income.
Variable Interest Entities
The primary beneficiary of a VIE is required to consolidate the VIE when it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE.
The Company has established a wholly-owned trust to issue preferred securities. See Note 6 under "Long-Term Debt Payable to an Affiliated Trust" for additional information. However, the Company is not considered the primary beneficiary of the trust. Therefore, the investment in the trust is reflected as other investments, and the related loan from the trust is reflected as long-term debt in the balance sheets.
2. RETIREMENT BENEFITS
The Company has a defined benefit, trusteed, pension plan covering substantially all employees. This qualified pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). On December 19, 2016, the Company voluntarily contributed $129 million to the qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2017. The Company also provides certain defined benefit pension plans for a selected group of management and highly compensated employees. Benefits under these non-qualified pension plans are funded on a cash basis. In addition, the Company provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans. The Company funds its other postretirement trusts to the extent required by the Alabama PSC and the FERC. For the year ending December 31, 2017, no other postretirement trusts contributions are expected.
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Alabama Power Company 2016 Annual Report

Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the following year and the benefit obligations as of the measurement date are presented below.
Assumptions used to determine net periodic costs:2016 2015 2014
Pension plans     
Discount rate – benefit obligations4.67% 4.18% 5.02%
Discount rate – interest costs3.90
 4.18
 5.02
Discount rate – service costs5.07
 4.49
 5.02
Expected long-term return on plan assets8.20
 8.20
 8.20
Annual salary increase4.46
 3.59
 3.59
Other postretirement benefit plans     
Discount rate – benefit obligations4.51% 4.04% 4.86%
Discount rate – interest costs3.69
 4.04
 4.86
Discount rate – service costs4.96
 4.40
 4.86
Expected long-term return on plan assets6.83
 7.17
 7.34
Annual salary increase4.46
 3.59
 3.59
Assumptions used to determine benefit obligations:2016 2015
Pension plans   
Discount rate4.44% 4.67%
Annual salary increase4.46
 4.46
Other postretirement benefit plans   
Discount rate4.27% 4.51%
Annual salary increase4.46
 4.46
The Company estimates the expected rate of return on pension plan and other postretirement benefit plan assets using a financial model to project the expected return on each current investment portfolio. The analysis projects an expected rate of return on each of seven different asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a periodic rebalancing of each trust's portfolio.
An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO as of December 31, 2016 were as follows:
 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.50% 4.50% 2025
Post-65 medical5.00
 4.50
 2025
Post-65 prescription10.00
 4.50
 2025
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An annual increase or decrease in the assumed medical care cost trend rate of 1% would affect the APBO and the service and interest cost components at December 31, 2016 as follows:
 
1 Percent
Increase
 
1 Percent
Decrease
 (in millions)
Benefit obligation$28
 $24
Service and interest costs1
 1
Pension Plans
The total accumulated benefit obligation for the pension plans was $2.4 billion at December 31, 2016 and $2.3 billion at December 31, 2015. Changes in the projected benefit obligations and the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$2,506
 $2,592
Service cost57
 59
Interest cost95
 106
Benefits paid(109) (120)
Actuarial (gain) loss114
 (131)
Balance at end of year2,663
 2,506
Change in plan assets   
Fair value of plan assets at beginning of year2,279
 2,396
Actual return (loss) on plan assets206
 (9)
Employer contributions141
 12
Benefits paid(109) (120)
Fair value of plan assets at end of year2,517
 2,279
Accrued liability$(146) $(227)
At December 31, 2016, the projected benefit obligations for the qualified and non-qualified pension plans were $2.5 billion and $124 million, respectively. All pension plan assets are related to the qualified pension plan.
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's pension plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$870
 $822
Other current liabilities(12) (11)
Employee benefit obligations(134) (216)
Presented below are the amounts included in regulatory assets at December 31, 2016 and 2015 related to the defined benefit pension plans that had not yet been recognized in net periodic pension cost along with the estimated amortization of such amounts for 2017.
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 2016 2015 
Estimated
Amortization
in 2017
 (in millions)
Prior service cost$10
 $6
 $3
Net (gain) loss860
 816
 42
Regulatory assets$870
 $822
  
The changes in the balance of regulatory assets related to the defined benefit pension plans for the years ended December 31, 2016 and 2015 are presented in the following table:
 2016 2015
 (in millions)
Regulatory assets:   
Beginning balance$822
 $827
Net (gain) loss84
 56
Change in prior service costs7
 
Reclassification adjustments:   
Amortization of prior service costs(3) (6)
Amortization of net gain (loss)(40) (55)
Total reclassification adjustments(43) (61)
Total change48
 (5)
Ending balance$870
 $822
Components of net periodic pension cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$57
 $59
 $48
Interest cost95
 106
 103
Expected return on plan assets(184) (178) (168)
Recognized net (gain) loss40
 55
 31
Net amortization3
 6
 7
Net periodic pension cost$11
 $48
 $21
Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the Company has elected to amortize changes in the market value of all plan assets over five years rather than recognize the changes immediately. As a result, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.
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Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2016, estimated benefit payments were as follows:
 
Benefit
Payments
 (in millions)
2017$122
2018127
2019132
2020137
2021142
2022 to 2026777
Other Postretirement Benefits
Changes in the APBO and in the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$505
 $503
Service cost5
 6
Interest cost18
 20
Benefits paid(28) (27)
Actuarial (gain) loss(1) (7)
Plan amendment
 7
Retiree drug subsidy2
 3
Balance at end of year501
 505
Change in plan assets   
Fair value of plan assets at beginning of year363
 392
Actual return (loss) on plan assets23
 (6)
Employer contributions7
 1
Benefits paid(26) (24)
Fair value of plan assets at end of year367
 363
Accrued liability$(134) $(142)
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's other postretirement benefit plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$86
 $95
Other regulatory liabilities, deferred(10) (13)
Employee benefit obligations(134) (142)
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Presented below are the amounts included in net regulatory assets (liabilities) at December 31, 2016 and 2015 related to the other postretirement benefit plans that had not yet been recognized in net periodic other postretirement benefit cost along with the estimated amortization of such amounts for 2017.
 2016 2015 
Estimated
Amortization
in 2017
 (in millions)
Prior service cost$15
 $19
 $4
Net (gain) loss61
 63
 1
Net regulatory assets$76
 $82
  
The changes in the balance of net regulatory assets (liabilities) related to the other postretirement benefit plans for the plan years ended December 31, 2016 and 2015 are presented in the following table:
 2016 2015
 (in millions)
Net regulatory assets (liabilities):   
Beginning balance$82
 $54
Net (gain) loss
 25
Change in prior service costs
 8
Reclassification adjustments:   
Amortization of prior service costs(4) (3)
Amortization of net gain (loss)(2) (2)
Total reclassification adjustments(6) (5)
Total change(6) 28
Ending balance$76
 $82
Components of the other postretirement benefit plans' net periodic cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$5
 $6
 $5
Interest cost18
 20
 20
Expected return on plan assets(25) (26) (25)
Net amortization6
 5
 4
Net periodic postretirement benefit cost$4
 $5
 $4
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Future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. Estimated benefit payments are reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 
Benefit
Payments
 
Subsidy
Receipts
 Total
 (in millions)
2017$32
 $(3) $29
201833
 (3) 30
201934
 (4) 30
202035
 (4) 31
202136
 (4) 32
2022 to 2026183
 (22) 161
Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code of 1986, as amended. The Company's investment policies for both the pension plan and the other postretirement benefit plans cover a diversified mix of assets, including equity and fixed income securities, real estate, and private equity. Derivative instruments are used primarily to gain efficient exposure to the various asset classes and as hedging tools. The Company minimizes the risk of large losses primarily through diversification but also monitors and manages other aspects of risk.
The composition of the Company's pension plan and other postretirement benefit plan assets as of December 31, 2016 and 2015, along with the targeted mix of assets for each plan, is presented below:
 Target 2016 2015
Pension plan assets:     
Domestic equity26% 29% 30%
International equity25
 22
 23
Fixed income23
 29
 23
Special situations3
 2
 2
Real estate investments14
 13
 16
Private equity9
 5
 6
Total100% 100% 100%
Other postretirement benefit plan assets:     
Domestic equity46% 44% 45%
International equity22
 20
 20
Domestic fixed income24
 29
 27
Special situations1
 1
 1
Real estate investments4
 4
 5
Private equity3
 2
 2
Total100% 100% 100%
The investment strategy for plan assets related to the Company's qualified pension plan is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significant portion of the liability of the pension plan is long-term in nature, the assets are invested consistent with long-term investment expectations for return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Company employs a
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Alabama Power Company 2016 Annual Report

formal rebalancing program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices.
Investment Strategies
Detailed below is a description of the investment strategies for each major asset category for the pension and other postretirement benefit plans disclosed above:
Domestic equity. A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.
International equity. A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Fixed income. A mix of domestic and international bonds.
Trust-owned life insurance (TOLI). Investments of the Company's taxable trusts aimed at minimizing the impact of taxes on the portfolio.
Special situations. Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies as well as investments in promising new strategies of a longer-term nature.
Real estate investments. Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.
Private equity. Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Benefit Plan Asset Fair Values
Following are the fair value measurements for the pension plan and the other postretirement benefit plan assets as of December 31, 2016 and 2015. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, management relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
Valuation methods of the primary fair value measurements disclosed in the following tables are as follows:
Domestic and international equity.Investments in equity securities such as common stocks, American depositary receipts, and real estate investment trusts that trade on a public exchange are classified as Level 1 investments and are valued at the closing price in the active market. Equity investments with unpublished prices (i.e. pooled funds) are valued as Level 2, when the underlying holdings used to value the investment are comprised of Level 1 or Level 2 equity securities.
Fixed income.Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
TOLI. Investments in TOLI policies are classified as Level 2 investments and are valued based on the underlying investments held in the policy's separate account. The underlying assets are equity and fixed income pooled funds that are comprised of Level 1 and Level 2 securities.
Real estate investments, private equity, and special situations investments.Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.
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Alabama Power Company 2016 Annual Report

The fair values of pension plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2015, investments in special situations were presented in the table below based on the nature of the investment.
 Fair Value Measurements Using  
 
Quoted Prices
in Active Markets for Identical Assets
 Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$477
 $220
 $
 $
 $697
International equity(*)
292
 264
 
 
 556
Fixed income:         
U.S. Treasury, government, and agency bonds
 140
 
 
 140
Mortgage- and asset-backed securities
 3
 
 
 3
Corporate bonds
 235
 
 
 235
Pooled funds
 124
 
 
 124
Cash equivalents and other236
 1
 
 
 237
Real estate investments74
 
 
 274
 348
Special situations
 
 
 43
 43
Private equity
 
 
 130
 130
Total$1,079
 $987
 $
 $447
 $2,513
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
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 Fair Value Measurements Using  
 
Quoted Prices
in Active Markets for Identical Assets
 Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$403
 $168
 $
 $
 $571
International equity(*)
294
 244
 
 
 538
Fixed income:         
U.S. Treasury, government, and agency bonds
 112
 
 
 112
Mortgage- and asset-backed securities
 49
 
 
 49
Corporate bonds
 280
 
 
 280
Pooled funds
 123
 
 
 123
Cash equivalents and other
 36
 
 
 36
Real estate investments74
 
 
 301
 375
Private equity
 
 
 157
 157
Total$771
 $1,012
 $
 $458
 $2,241
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
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Alabama Power Company 2016 Annual Report

The fair values of other postretirement benefit plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2015, investments in special situations were presented in the table below based on the nature of the investment.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$51
 $10
 $
 $
 $61
International equity(*)
13
 12
 
 
 25
Fixed income:         
U.S. Treasury, government, and agency bonds
 7
 
 
 7
Mortgage- and asset-backed securities
 
 
 
 
Corporate bonds
 10
 
 
 10
Pooled funds
 5
 
 
 5
Cash equivalents and other14
 
 
 
 14
Trust-owned life insurance
 220
 
 
 220
Real estate investments4
 
 
 12
 16
Special situations
 
 
 2
 2
Private equity
 
 
 6
 6
Total$82
 $264
 $
 $20
 $366
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
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Alabama Power Company 2016 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$57
 $8
 $
 $
 $65
International equity(*)
14
 12
 
 
 26
Fixed income:         
U.S. Treasury, government, and agency bonds
 8
 
 
 8
Mortgage- and asset-backed securities
 2
 
 
 2
Corporate bonds
 13
 
 
 13
Pooled funds
 6
 
 
 6
Cash equivalents and other1
 2
 
 
 3
Trust-owned life insurance
 212
 
 
 212
Real estate investments5
 
 
 14
 19
Private equity
 
 
 7
 7
Total$77
 $263
 $
 $21
 $361
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
Employee Savings Plan
The Company also sponsors a 401(k) defined contribution plan covering substantially all employees. The Company provides an 85% matching contribution on up to 6% of an employee's base salary. Total matching contributions made to the plan for 2016, 2015, and 2014 were $23 million, $22 million, and $21 million, respectively.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
The Company is subject to certain claims and legal actions arising in the ordinary course of business. In addition, the Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.
Environmental Matters
Environmental Remediation
The Company must comply with environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Company could incur substantial costs to clean up affected sites. The Company conducts studies to determine the extent of any required cleanup and has recognized in its financial statements the costs to clean up known sites. Amounts for cleanup and ongoing monitoring costs were not material for any year
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Alabama Power Company 2016 Annual Report

presented. The Company may be liable for some or all required cleanup costs for additional sites that may require environmental remediation.
Nuclear Fuel Disposal Costs
Acting through the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. government entered into a contract with the Company that requires the DOE to dispose of spent nuclear fuel and high level radioactive waste generated at Plant Farley beginning no later than January 31, 1998. The DOE has yet to commence the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, the Company has pursued and continues to pursue legal remedies against the U.S. government for its partial breach of contract.
In 2014, the Court of Federal Claims entered a judgment in favor of the Company in its spent nuclear fuel lawsuit seeking damages for the period from January 1, 2005 through December 31, 2010. In March 2015, the Company recovered approximately $26 million, which was applied to reduce the cost of service for the benefit of customers.
In 2014, the Company filed an additional lawsuit against the U.S. government for the costs of continuing to store spent nuclear fuel at Plant Farley for the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extended to December 31, 2014. Damages will continue to accumulate until the issue is resolved or storage is provided. No amounts have been recognized in the financial statements as of December 31, 2016 for any potential recoveries from this lawsuit. The final outcome of this matter cannot be determined at this time; however, no material impact on the Company's net income is expected.
At Plant Farley, on-site dry spent fuel storage facilities are operational and can be expanded to accommodate spent fuel through the expected life of the plant.
FERC Matters
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company) and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Retail Regulatory Matters
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon the Company's projected weighted cost of equity (WCE) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Retail rates remain unchanged when the WCE ranges between 5.75% and 6.21% with an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCE adjusting point if the Company (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. Rate RSE adjustments for any two-year period, when averaged
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Alabama Power Company 2016 Annual Report

together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. If the Company's actual retail return is above the allowed WCE range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCE range.
On December 1, 2016, the Company made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2017. The Rate RSE adjustment was an increase of 4.48%, or $245 million annually, effective January 1, 2017 and includes the performance based adder of 0.07%. Under the terms of Rate RSE, the maximum increase for 2018 cannot exceed 3.52%.
As of December 31, 2016, the 2016 retail return exceeded the allowed WCE range; therefore, the Company established a $73 million Rate RSE refund liability. In accordance with an order issued on February 14, 2017 by the Alabama PSC, the Company was directed to apply the full amount of the refund to reduce the under recovered balance of Rate CNP PPA.
Rate CNP PPA
The Company's retail rates, approved byRate CNP PPA allows for the recovery of Alabama PSC, provide for adjustments to recognize the placing of new generating facilities into retail service under Rate CNP. The Company may also recoverPower's retail costs associated with certificated PPAs under Rate CNP PPA. On March 8, 2016, the Alabama PSC issued a consent order that the Company leave in effect the current Rate CNP PPA factor for billings for the period April 1, 2016 through March 31, 2017.PPAs. No adjustmentadjustments to Rate CNP PPA occurred during the period 2017 through 2019 and no adjustment is expected in 2017. As of December 31, 2016 and 2015, the Company had an under recovered certificated PPA balance of $142 million and $99 million, respectively, which is included in deferred under recovered regulatory clause revenues in the balance sheet.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, the Company was authorized to eliminate the under recovered balance in Rate CNP PPA at December 31, 2016, which totaled approximately $142 million. As discussed herein under "Rate RSE," the Company will utilize the full amount of its $73 million Rate RSE refund liability to reduce the amount of the Rate CNP PPA under recovery and will reclassify the remaining $69 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of the Company's next depreciation study, which is expected to occur within the next three to five years. The Company's current depreciation study became effective January 1, 2017.for 2020.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of the Company'sAlabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting the Company'sAlabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to a factorfactors that isare calculated annually.and submitted to the Alabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on theSouthern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in compliance relatedRate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On December 6, 2016, theNovember 27, 2019, Alabama PSC issued a consent order that the Company leave in effect for 2017 the factorsPower submitted calculations associated with the Company's compliance costsits cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the year 2016. As stated in the consent order, any under-collected amount for prior years will be deemed recovered before the recoverybilling month of any current year amounts. Any under recovered amounts associated with 2017 will be reflected in the 2018 filing. As of December 31, 2016, the Company had a deferred under recovered regulatory clause revenues balance of $9 million.
In accordance with an accounting order issued on February 17, 2017 by the Alabama PSC, the Company is authorized to classify any under recovered balance in Rate CNP Compliance up to approximately $36 million to a separate regulatory asset. The amortization of the new regulatory asset through Rate RSE will begin concurrently with the effective date of the Company's next depreciation study, which is expected to occur within the next three to five years. The Company's current depreciation study became effective January 1, 2017.2020.
Rate ECR
The Company has established energy cost recovery rates under the Company's Rate ECR as approved by therecovers Alabama PSC. Rates arePower's retail energy costs based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed givegives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. The Company,Alabama Power, along with the Alabama PSC, continually monitors the over or
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NOTES (continued)
Alabama Power Company 2016 Annual Report

under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on theSouthern Company's or Alabama Power's net income but will impact operating cash flows. Currently, theThe Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH. In December 2015, the Alabama PSC issued a consent order that the Company decrease the Rate ECR factor from 2.681 cents per KWH to 2.030 cents per KWH.
On December 6, 2016,3, 2019, the Alabama PSC approved a decrease in the Company'sto Rate ECR factor from 2.0302.353 to 2.0152.160 cents per KWH, equal to 0.15%1.82%, or $8approximately $102 million annually, based upon projected billings, effective January 1, 2017.2020. The rate will returnadjust to 5.910 cents per KWH in 2018January 2021 absent a further order from the Alabama PSC.
At December 31, 2016
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and 2015,Subsidiary Companies 2019 Annual Report

Tax Reform Accounting Order
In May 2018, the Company's over recovered fuel costs totaled $76 million and $238 million, respectively, and are included in other regulatory liabilities, current. These classifications are based on estimates, which include such factors as weather, generation availability, energy demand, and the price of energy. A change in any of these factors could have a material impact on the timing of any recovery or return of fuel costs.
In accordance withAlabama PSC approved an accounting order issued on February 17, 2017 bythat authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power to apply the Company is authorizedremaining deferred balance of approximately $39 million to classify any under recoveredincrease the balance in the NDR. See "Rate ECR upNDR" herein and Note 10 to approximately $36 millionthe financial statements under "Current and Deferred Income Taxes" for additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Joint Ownership Agreements" for additional information regarding the joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a separate regulatory asset. The amortizationfour-year acceleration of the newretirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to monitor the status of Mississippi Power's proposed RMP and associated regulatory asset through Rate RSEprocess as well as the proposed transmission and system reliability improvements. Alabama Power will begin concurrently withreview all the effective datefacts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of the Company's next depreciation study, which is expected to occur within the next three to five years.Plant Greene County. The Company's current depreciation study became effective January 1, 2017.ultimate outcome of this matter cannot be determined at this time.
Rate NDR
Based on an order from the Alabama PSC, the CompanyAlabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month24-month period. The Alabama PSC order gives the CompanyAlabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10$10 per month per non-residential customer account and $5$5 per month per residential customer account. The CompanyAlabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. The Company$75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR will enhance the Company'sAlabama Power's ability to deal withmitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear. No such accruals were recorded or
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in any period presented.other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Environmental Accounting Order
Based on an order from the Alabama PSC the Company(Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. These costs areThe regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
InOn April 2015, as part of its environmental compliance strategy, the Company15, 2019, Alabama Power retired Plant Gorgas Units 8, 9, and 10 and reclassified approximately $654 million of the unrecovered asset balances to regulatory assets, which are being recovered over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 2 to the financial statements under "Alabama Power" and Note 6 to the financial statements for additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through an alternate rate plan, which includes traditional base tariffs, Demand-Side Management (DSM) tariffs, the ECCR tariff, and 7 (200 MWs)Municipal Franchise Fee (MFF) tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariff. See Note 2 to the financial statements under "Georgia PowerRate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP continued in effect until December 31, 2019. Furthermore, through December 31, 2019, Georgia Power retained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60/40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariffs, ECCR tariff, DSM tariffs, or MFF tariffs in 2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE was set at 10.95% and earnings were evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% were to be directly refunded to customers, with the remaining one-third retained by Georgia Power. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2019 and 2018, Georgia Power's retail ROE exceeded 12.00% and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia Power has reduced regulatory assets by a total of approximately $110 million and expects to refund a total of approximately $110 million to customers, subject to review and approval by the Georgia PSC. See "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2015,2018, the Company ceased using coal atGeorgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Integrated Resource Plan
See "Environmental Matters" herein for additional information regarding proposed and final EPA rules and regulations, including revisions to ELG for steam electric power plants and additional regulations of CCR and CO2.
On July 16, 2019, the Georgia PSC voted to approve Georgia Power's modified triennial IRP (Georgia Power 2019 IRP). In the Georgia Power 2019 IRP, the Georgia PSC approved the decertification and retirement of Plant BarryHammond Units 1 through 4 (840 MWs) and 2 (250Plant McIntosh Unit 1 (142.5 MWs), but such units will remain available on a limited basis with natural gas as the fuel source. effective July 29, 2019. In accordance with the joint stipulation entered2019 ARP, the remaining net book values at December 31, 2019 of $488 million for the Plant Hammond units are being recovered over a period equal to the respective unit's remaining useful life, which varies between 2024 and 2035, and $30 million for Plant McIntosh Unit 1 is being recovered over a three-year period ending December 31, 2022. In addition, approximately $20 million of related unusable materials and supplies inventory balances and approximately $295 million of net capitalized asset retirement costs were reclassified to a regulatory asset. In accordance with the modifications to the earnings sharing mechanism approved in connectionthe 2019 ARP, Georgia Power fully amortized the regulatory assets associated with these unusable materials and supplies inventory
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

balances as well as a civil enforcement action byregulatory asset of approximately $50 million related to costs for a future generation site in Stewart County, Georgia. See "Rate Plans – 2019 ARP" herein for additional information.
Also in the EPA,Georgia Power 2019 IRP, the Company retired Plant Barry Unit 3 (225 MWs) in August 2015 and it is no longer available for generation. In April 2016, as part of itsGeorgia PSC approved Georgia Power's proposed environmental compliance strategy associated with ash pond and certain landfill closures and post-closure care in compliance with the CCR Rule and the related state rule. In the 2019 ARP, the Georgia PSC approved recovery of the estimated under recovered balance of these compliance costs at December 31, 2019 over a three-year period ending December 31, 2022 and recovery of estimated compliance costs for 2020, 2021, and 2022 over three-year periods ending December 31, 2022, 2023, and 2024, respectively, with recovery of construction contingency beginning in the year following actual expenditure. The under recovered balance at December 31, 2019 was $175 million and the estimated compliance costs expected to be incurred in 2020, 2021, and 2022 are $265 million, $290 million, and $390 million, respectively. The ECCR tariff is expected to be revised for actual expenditures and updated estimates through future annual compliance filings. See "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and "Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Georgia Power's AROs.
On February 4, 2020, the Georgia PSC voted to deny a motion for reconsideration filed by the Sierra Club regarding the Georgia PSC's decision in the 2019 ARP allowing Georgia Power to recover compliance costs for CCR AROs.
Additionally, the Georgia PSC rejected a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020 following the expiration of a wholesale PPA. Georgia Power may offer such capacity in the wholesale market or to the retail jurisdiction in a future IRP.
The Georgia PSC also approved Georgia Power to (i) issue requests for proposals (RFP) for capacity beginning in 2022 or 2023 and in 2026, 2027, or 2028; (ii) procure up to an additional 2,210 MWs of renewable resources through competitive RFPs; and (iii) invest in a portfolio of up to 80 MWs of battery energy storage technologies.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. Georgia Power is scheduled to file its next fuel case no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million. At December 31, 2019, Georgia Power's over recovered fuel balance was $73 million.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's or Georgia Power's revenues or net income but will affect operating cash flows.
Storm Damage Recovery
Beginning January 1, 2020, Georgia Power is recovering $213 million annually through December 31, 2022, as provided in the 2019 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2019, the balance in the regulatory asset related to storm damage was $410 million. The rate of storm damage cost recovery is expected to be adjusted in future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's or Georgia Power's financial statements. See Note 2 to the financial statements under "Georgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company ceased using coaland Subsidiary Companies 2019 Annual Report

2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 (300 MWs representingto the Company's ownership interest)third quarter 2021 and began operatingthe third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 solelycurrently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on natural gasSouthern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in June 2016three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2016, respectively.2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with thisa 2011 accounting order from the AlabamaMississippi PSC, Mississippi Power has the Company transferred the unrecovered plant asset balancesauthority to defer in a regulatory asset at their respective retirement dates.for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory asset will be amortizedassets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered through Rate CNPretail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


ComplianceMississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the units' remaining useful lives,balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the decision for retirement; therefore, these decisionsKemper Settlement Docket, as well as the charge associated with coalthe Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion,
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Southern Company and Subsidiary Companies 2019 Annual Report

and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 to the financial statements for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations hadthrough the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no significantresulting impact on income. In conjunction with the Company'stransfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements.statements for additional information.
Cost of Removal Accounting OrderGovernment Grants
In accordance2010, the DOE, through a cooperative agreement with an accounting order issued by the Alabama PSC, in 2014, the Company fully amortized the balance of $123 million in certain regulatory asset accounts and offset this amortization expense with the amortization of $120SCS, agreed to fund $270 million of the regulatory liabilityKemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for other costexpenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of removal obligations.grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The regulatory asset accounts fully amortizedultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and terminatedMississippi Power's financial statements.
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Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2014 represented costs previously deferred2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a compliance and pension cost accounting ordermaximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as well as a non-nuclear outage accounting order, which wereagreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the AlabamaMississippi PSC in 2012February 2018, and 2013, respectively. Approximately $95 million of non-nuclear outage costs and $28 million of compliance and pension costs previously deferred were fully amortized in 2014.
4. JOINT OWNERSHIP AGREEMENTS
The Company and Georgia Power own equally allreflecting the impacts of the outstanding capital stockTax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of SEGCO,the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which owns electric generating units with a total rated capacity of 1,020 MWs, as well as associated transmission facilities. The capacity of these units is sold equally to the Company and Georgia Power under a power contract. The Company and Georgia Power make payments sufficientFERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating expenses, taxes, interest expense,in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and ROE.maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Company's shareMarketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of purchased power totaled $55 millionAtlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in 2016, $76 million in 2015, and $84 million in 2014 and is included in "Purchased power from affiliates"these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the statementsstates in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale
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cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for SEGCO usingcustomers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the equity method.
In addition, thebilling factor will not have a significant effect on Southern Company has guaranteed unconditionally the obligation of SEGCO under an installment sale agreementGas' revenues or net income, but will affect cash flows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the purchase of certain pollution control facilities at SEGCO's generating units, pursuantMarketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to which $25 million principal amount of pollution control revenue bonds are outstanding. The Company has guaranteed $100 million principal amount of unsecured senior notes issued by SEGCO for general corporate purposes. These senior notes mature on December 1, 2018. Georgia Power has agreed to reimburse the Company for the pro rata portion of such obligations corresponding to its then proportionate ownership of stock of SEGCO if the Company is called upon to make such payment under its guarantee.
At December 31, 2016, the capitalization of SEGCO consisted of $108 million of equity and $125 million of long-term debt on which the annual interest requirement is $3 million. In addition, SEGCO had short-term debt outstanding of $38 million. SEGCO paid $24 million of dividends in 2016 compared to an immaterial amount in 2015 and 2014, of which one-half of each was paid to the Company. In addition, the Company recognizes 50% of SEGCO's net income.
SEGCO added natural gas as a fuel source for 1,000 MWs of its generating capacity in 2015. In April 2016, natural gas became the primary fuel source. The Company, which owns and operates a generating unit adjacent to the SEGCO generating units, has entered into a joint ownership agreement with SEGCO for the ownership of an associated gas pipeline. The Company owns 14% of the pipeline with the remaining 86% owned by SEGCO.
Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the Company's ownershipfixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of SEGCOthese fixed costs from the amounts of natural gas used by customers. See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and joint ownershipCapital Projects" for additional information regarding infrastructure replacement programs at certain of an associatedthe natural gas pipeline, the Company's percentage ownership and investment in jointly-owned generating plants at December 31, 2016 were as follows:distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
FacilityTotal MW Capacity Company Ownership  Plant in Service Accumulated Depreciation Construction Work in Progress
      (in millions)
Greene County500
 60.00%
(1) 
 $168
 $66
 $1
Plant Miller          
Units 1 and 21,320
 91.84%
(2) 
 1,657
 587
 23
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(1)(a)Jointly owned with an affiliate, Mississippi Power.Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(2)(b)Jointly ownedRegulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with PowerSouth Energy Cooperative, Inc.plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.
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Pursuant to operatethe GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
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Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its jointly-ownedbalance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Programs
The Registrants are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations.
For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the financial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See "Southern Company Gas" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities and certain pipeline construction projects.
See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein for additional information regarding the Registrants' capital requirements for their construction programs, including estimated totals for each of the next five years.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement,
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which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Services Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their co-owners. The Company'sconvenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events.
See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of its plant operating expensesthe remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is included in operating expensesas follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the statementssecond quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However,
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Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
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Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.
Georgia Power is responsiblerequired to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for providingAFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,
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$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its own financing.January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.
The ultimate outcome of these matters cannot be determined at this time.
5. INCOME TAXESSouthern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
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(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 2019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure. In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential
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variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Rate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in two significant pipeline construction projects within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approval.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.
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Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was no impairment as of December 31, 2019.
See Notes 3 and 7 to the financial statements under "Guarantees" and "Southern Company GasEquity Method Investments," respectively, for additional information on these pipeline projects.
Southern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and
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from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Consolidated Income Taxes
On behalf of the Company,Registrants, Southern Company files a consolidated federal income tax return and various combined and separate state income tax returns.returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's
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NOTES (continued)
Alabama Power Company 2016 Annual Report

current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect each Registrant's ability to utilize certain tax credits. See "Tax Credits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 10 to the financial statements for additional information.
Federal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
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Southern Company and Subsidiary Companies 2019 Annual Report

Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows for the Registrants as follows:
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Cash flows resulting from bonus depreciation for Southern Power would also be impacted by Southern Power's use of tax equity partnerships.
See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Details of income tax provisions are as follows:
 2016 2015 2014
 (in millions)
Federal —     
Current$103
 $110
 $198
Deferred339
 320
 225
 442
 430
 423
State —     
Current20
 8
 44
Deferred69
 68
 45
 89
 76
 89
Total$531
 $506
 $512
Tax Credits
The Tax Reform Legislation retained solar energy incentives of 30% ITC for projects that commenced construction by December 31, 2019; 26% ITC for projects that commence construction in 2020; 22% ITC for projects that commence construction in 2021; and a permanent 10% ITC for projects that commence construction on or after January 1, 2022. In addition, the Tax Reform Legislation retained wind energy incentives of 100% PTC for projects that commenced construction in 2016; 80% PTC for projects that commenced construction in 2017; 60% PTC for projects that commenced construction in 2018; and 40% PTC for projects that commenced construction in 2019. As a result of a tax effectsextenders bill passed in December 2019, projects that begin construction in 2020 will be entitled to 60% PTC. Projects commencing construction after 2020 will not be entitled to any PTCs. Southern Company has received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power.
Southern Power's ITCs relate to its investment in new solar facilities acquired or constructed and its PTCs relate to the first 10 years of temporary differences betweenenergy production from its wind facilities, which have had, and may continue to have, a material impact on Southern Power's cash flows and net income. At December 31, 2019, Southern Company and Southern Power had approximately $1.8 billion and $1.4 billion, respectively, of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2024, but could be further delayed. Since 2018, Southern Power has been utilizing tax equity partnerships for wind and solar projects, where the carrying amountstax partner takes significantly all of assetsthe respective federal tax benefits. These tax equity partnerships are consolidated in Southern Company's and liabilities inSouthern Power's financial statements using the HLBV methodology to allocate partnership gains and losses. See Note 1 to the financial statements under "General" for additional information on the HLBV methodology and their respectiveNote 1 to the financial statements under "Income Taxes" and Note 10 to the financial statements under "Deferred Tax Assets and LiabilitiesTax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax bases, which give risebenefit related to deferred tax assets and liabilities, are as follows:associated basis differences.
 2016 2015
 (in millions)
Deferred tax liabilities —   
Accelerated depreciation$4,307
 $3,917
Property basis differences456
 456
Premium on reacquired debt26
 28
Employee benefit obligations201
 200
Regulatory assets associated with employee benefit obligations393
 375
Asset retirement obligations289
 289
Regulatory assets associated with asset retirement obligations347
 312
Other179
 175
Total6,198
 5,752
Deferred tax assets —   
Federal effect of state deferred taxes266
 242
Unbilled fuel revenue36
 39
Storm reserve21
 23
Employee benefit obligations427
 407
Other comprehensive losses19
 20
Asset retirement obligations636
 600
Other139
 180
Total1,544
 1,511
Accumulated deferred income taxes, net$4,654
 $4,241
General Litigation Matters
The applicationRegistrants are involved in various other matters being litigated and regulatory matters that could affect future earnings. The ultimate outcome of bonus depreciation provisionssuch pending or potential litigation or regulatory matters against each Registrant and any subsidiaries cannot be determined at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current tax law significantly increased deferred tax liabilities relatedproceedings would have a material effect on such Registrant's financial statements. See Notes 2 and 3 to accelerated depreciation in 2016the financial statements for a discussion of various other contingencies, regulatory matters, and 2015.other matters being litigated which may affect future earnings potential.
The Registrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


AtSouthern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and three members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included four additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Other Matters
Southern Company
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows. See Note 1 to the financial statements under "Leveraged Leases" for additional information.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

While all lease payments through December 31, 2016,2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the tax-related regulatoryresulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be recoveredreceived under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from customers were $526 million. These assets are primarily attributable to tax benefits flowed through to customersthe Southern Holdings subsidiary, in prior years, deferred taxes previously recognized at rates lower thaneffect terminating the current enacted tax law,lease and taxes applicable to capitalized interest.
At December 31, 2016,resulting in the tax-related regulatory liabilities to be credited to customers were $65 million. These liabilities are primarily attributable to unamortized ITCs.
In accordance with regulatory requirements, deferred federal ITCs are amortized over the average lifewrite-off of the related propertylease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such amortization normally appliedthat each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a creditresult, the cavern will not return to reduce depreciationservice by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has two other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the statementsU.S. natural gas storage market. Recent sales of income. Credits amortizednatural gas storage facilities have resulted in this manner amounted to $8losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million annually in 2016, 2015, and 2014. Atat December 31, 2016, all ITCs available to reduce federal income taxes payable had been utilized.2019.
Effective Tax Rate
A reconciliationThe ultimate outcome of the federal statutory income tax rate to the effective income tax rate is as follows:
 2016 2015 2014
Federal statutory rate35.0% 35.0% 35.0%
State income tax, net of federal deduction4.2 3.8 4.4
Non-deductible book depreciation1.0 1.2 1.1
AFUDC equity(0.7) (1.6) (1.3)
Other(0.7)  (0.2)
Effective income tax rate38.8% 38.4% 39.0%
On March 30, 2016, the FASB issued ASU 2016-09, which changes the accounting for income taxes for share-based payment award transactions. Entities are required to recognize all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation as income tax expense or benefit in the income statement. The adoption of ASU 2016-09 did notthese matters cannot be determined at this time, but could have a material impact on the financial statements of Southern Company and Southern Company Gas.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Registrants prepare their financial statements in accordance with GAAP. Significant accounting policies are described in the notes to the financial statements. In the application of these policies, certain estimates are made that may have a material impact
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Southern Company and Subsidiary Companies 2019 Annual Report

on the results of operations and related disclosures of the applicable Registrants (as indicated in the section descriptions herein). Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The traditional electric operating companies and the natural gas distribution utilities are subject to retail regulation by their respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the FERC. These regulatory agencies set the rates the traditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result, the traditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards for rate regulated entities also impacts their financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the results of operations and financial condition of the applicable Registrants than they would on a non-regulated company.
Revenues related to regulated utility operations as a percentage of total operating revenues in 2019 for the applicable Registrants were as follows: 87% for Southern Company, 99% for Alabama Power, 97% for Georgia Power, 100% for Mississippi Power, and 80% for Southern Company Gas.
As reflected in Note 2 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the financial statements of the applicable Registrants.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
(Southern Company and Georgia Power)
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In 2017, the Georgia PSC approved Georgia Power's seventeenth VCM report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for Unit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion, respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the base capital cost forecast in the nineteenth VCM report. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory
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proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However, Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall effective tax rate.capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or
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not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as well as the potential impact on results of operations and cash flows, Southern Company and Georgia Power consider these items to be critical accounting estimates. See Note 12 to the financial statements under "Recently Issued Accounting StandardsGeorgia PowerNuclear Construction" for additional information.
Unrecognized Tax Benefits
Accounting for Income Taxes (Southern Company, Mississippi Power, Southern Power, and Southern Company Gas)
The Company has no materialconsolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the periods presented. Thevarious states in which the Southern Company classifies interestsystem operates.
On behalf of its subsidiaries, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax uncertainties as interest expense. Accrued interest for unrecognizedreturn. Certain deductions and credits can be limited or utilized at the consolidated or combined level resulting in NOL and tax benefits was immaterialcredit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and tax credit carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of Southern Company's and its subsidiaries' current financial position and results of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on the financial statements of the applicable Registrants.
Given the significant judgment involved in estimating NOL and tax credit carryforwards and multi-state apportionments for all subsidiaries, the applicable Registrants consider deferred income tax liabilities and assets to be critical accounting estimates.
Asset Retirement Obligations (Southern Company, didAlabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
AROs are computed as the present value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The ARO liabilities for the traditional electric operating companies primarily relate to facilities that are subject to the CCR Rule and the related state rules, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of nuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2). The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and for Mississippi Power, mine reclamation and water wells.
The traditional electric operating companies and Southern Company Gas also have identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos-containing material within long-term assets not accrue any penaltiessubject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on uncertain tax positions.customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these
It
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

assets have not been recorded because the settlement timing for certain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably possibleestimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule and the related state rules. The traditional electric operating companies expect to update their ARO cost estimates periodically as additional information related to these assumptions becomes available. See Note 6 to the financial statements for additional information, including increases to AROs related to ash ponds recorded during 2019 by certain Registrants.
Given the significant judgment involved in estimating AROs, the applicable Registrants consider the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The applicable Registrants' calculations of pension and other postretirement benefits expense are dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term rate of return (LRR) on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the applicable Registrants believe the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect their pension and other postretirement benefit costs and obligations.
Key elements in determining the applicable Registrants' pension and other postretirement benefit expense are the LRR and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. For purposes of determining the applicable Registrants' liabilities related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. The discount rate assumption impacts both the service cost and non-service costs components of net periodic benefit costs as well as the projected benefit obligations.
The LRR on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations that consider external actuarial advice, and represents the average rate of earnings expected over the long term on the assets invested to provide for anticipated future benefit payments. Southern Company determines the amount of the unrecognizedexpected return on plan assets component of non-service costs by applying the LRR of various asset classes to Southern Company's target asset allocation. The LRR only impacts the non-service costs component of net periodic benefit costs for the following year and is set annually at the beginning of the year.
For 2019, the LRR assumption for qualified pension plan assets was reduced from 7.95% to 7.75% for purposes of determining net periodic pension expense as a result of changes in the economic outlook used in estimating the expected returns as of December 31, 2018. As a result of the decrease in the LRR, the non-service costs component of net periodic pension expense increased by $24 million for the Southern Company system in 2019. See the table below for the impact on each Registrant.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
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For 2020, net periodic pension expense will be impacted by two factors: a change in the approach used to determine the LRR assumption and cash contributions totaling $1.1 billion to the qualified pension plan made in December 2019. Historically, Southern Company has set the LRR assumption using asset return modeling based on geometric returns that reflect the compound average returns for dependent annual periods. Beginning in 2020, Southern Company will set the LRR assumption using an arithmetic mean which represents the expected simple average return to be earned by the pension plan assets over any one year. Southern Company believes the use of the arithmetic mean is more compatible with the LRR's function of estimating a single year's investment return. Excluding the additional pension contribution in December 2019, the change in the LRR assumption will reduce the non-service costs component of net periodic pension expense by $78 million for the Southern Company system in 2020. See the table below for the impact on each Registrant. The contributions in 2019 will further reduce expense by $88 million for the Southern Company system in 2020.
 Southern Company
Alabama
Power
Georgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Increase (decrease) in pension expense:   
2019$24
$5
$8
$1
$2
2020(78)(18)(25)(4)(7)
The following table illustrates the sensitivity to changes in the applicable Registrants' long-term assumptions with respect to the discount rate, salary increases, and the long-term rate of return on plan assets:
Increase/(Decrease) in
25 Basis Point Change in:Total Benefit Expense for 2020Projected Obligation for Pension Plan at December 31, 2019
Projected Obligation for
Other Postretirement
Benefit Plans at December 31, 2019
(in millions)
Discount rate:
Southern Company$41/$(39)$549/$(518)$57/$(54)
Alabama Power$10/$(10)$131/$(123)$14/$(13)
Georgia Power$12/$(11)$166/$(156)$21/$(20)
Mississippi Power$2/$(2)$25/$(23)$2/$(2)
Southern Company Gas$1/$(1)$38/$(36)$6/$(6)
Salaries:
Southern Company$23/$(22)$118/$(113)$–/$–
Alabama Power$6/$(6)$33/$(32)$–/$–
Georgia Power$6/$(6)$34/$(33)$–/$–
Mississippi Power$1/$(1)$5/$(5)$–/$–
Southern Company Gas$1/$(1)$3/$(3)$–/$–
Long-term return on plan assets:
Southern Company$35/$(35)N/AN/A
Alabama Power$9/$(9)N/AN/A
Georgia Power$11/$(11)N/AN/A
Mississippi Power$2/$(2)N/AN/A
Southern Company Gas$3/$(3)N/AN/A
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Asset Impairment (Southern Company, Southern Power, and Southern Company Gas)
Goodwill (Southern Company and Southern Company Gas)
The acquisition method of accounting requires the assets acquired and liabilities assumed to be recorded at the date of acquisition at their respective estimated fair values. The applicable Registrants have recognized goodwill as of the date of their acquisitions, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the fourth quarter of the year as well as on an interim basis as events and changes in circumstances occur, including, but not limited to, a significant change in operating performance, the business climate, legal or regulatory factors, or a planned sale or disposition of a significant portion of the business. A reporting unit is the operating segment, or a business one level below the operating segment (a component), if discrete financial information is prepared and regularly reviewed by management. Components are aggregated if they have similar economic characteristics.
As part of the impairment tests, the applicable Registrant may perform an initial qualitative assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount before applying the quantitative goodwill impairment test. If the applicable Registrant elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If the applicable Registrant determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it compares the fair value of the reporting unit to its carrying value to determine if the fair value is greater than its carrying value.
Goodwill for Southern Company and Southern Company Gas was $5.3 billion and $5.0 billion, respectively, at December 31, 2019. For its 2019 and 2018 annual impairment tests, Southern Company Gas performed the qualitative assessment and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For its 2017 annual impairment test, Southern Company Gas performed the quantitative assessment, which resulted in the fair value of all of its reporting units that have goodwill exceeding their carrying value. For its annual impairment tests for PowerSecure, Southern Company performed the quantitative assessment, which resulted in the fair value of goodwill at PowerSecure exceeding its carrying value in all years presented. However, Southern Company recorded goodwill impairment charges totaling $34 million in 2019 as a result of its decision to sell certain PowerSecure business units. See Note 15 to the financial statements under "Southern Company" for additional information.
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can significantly impact the applicable Registrant's results of operations. Fair values and useful lives are determined based on, among other factors, the expected future period of benefit of the asset, the various characteristics of the asset, and projected cash flows. As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 1 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities" for additional information regarding the applicable Registrants' goodwill.
Long-Lived Assets (Southern Company, Southern Power, and Southern Company Gas)
Impairments of long-lived assets of the traditional electric utilities and natural gas distribution utilities are generally related to specific regulatory disallowances. The applicable Registrants assess their other long-lived assets for impairment whenever events or changes in circumstances indicate that an asset's carrying amount may not be recoverable. If an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of the undiscounted expected future cash flows directly attributable to the asset's use and eventual disposition. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determined and a loss is recorded equal to the difference between the carrying value and the fair value of the asset. In addition, when assets are identified as held for sale, an impairment loss is recognized to the extent the carrying value of the assets or asset group exceeds their fair value less cost to sell. A high degree of judgment is required in developing estimates related to these evaluations, which are based on projections of various factors, some of which have been quite volatile in recent years.
Southern Power's investments in long-lived assets are primarily generation assets, whether in service or under construction. Excluding the natural gas distribution utilities, Southern Company Gas' investments in long-lived assets are primarily natural gas transportation and storage facility assets, whether in service or under construction. In addition, exclusive of the traditional electric operating companies and natural gas distribution utilities, Southern Company's investments in long-lived assets also include investments in leveraged leases.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

For Southern Power, examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to remarket generating capacity for an extended period, the unplanned termination of a customer contract or the inability of a customer to perform under the terms of the contract, or the inability to deploy wind turbine equipment to a development project. For Southern Company Gas, examples of impairment indicators could include, but are not limited to, significant changes in the U.S. natural gas storage market, construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to renew or extend customer contracts or the inability of a customer to perform under the terms of the contract, attrition rates, or the inability to deploy a development project. For Southern Company's investments in leveraged leases, impairment indicators include changes in estimates of future rental payments to be received under the lease as well as the residual value of the leased asset at the end of the lease.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 3 to the financial statements under "Other Matters" and Note 15 to the financial statements for information on certain assets recently evaluated for impairment.
Derivatives and Hedging Activities (Southern Company and Southern Company Gas)
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in the applicable Registrant's assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value of derivative instruments may change significantly from period to period depending upon market conditions, and changes in hedge effectiveness may impact the accounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. If the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempt from fair value accounting treatment and is, instead, subject to traditional accrual accounting. The applicable Registrant utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI on the balance sheets until the hedged transaction affects earnings in the case of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as document and assess the effectiveness of derivatives associated with transactions that receive hedge accounting treatment.
Southern Company Gas uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and, to a lesser extent, Southern Company Gas hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that Southern Company Gas would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
Derivative assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of nonperformance risk on liabilities.
A significant change in the underlying market prices or pricing assumptions used in pricing derivative assets or liabilities may result in a significant financial statement impact.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Given the assumptions used in pricing the derivative asset or liability, Southern Company and Southern Company Gas consider the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Note 14 to the financial statements for more information.
Revenue Recognition (Southern Power)
Southern Power's power sale transactions, which include PPAs, are classified in one of four general categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges, as described further below. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 14 to the financial statements. Southern Power's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
Southern Power considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;
Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the counterparty substantially all of the economic benefits and the right to direct the use of the asset.
If the contract meets the above criteria for a lease, Southern Power performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of Southern Power's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in Southern Power's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered. See Note 9 to the financial statements for additional information.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, Southern Power further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within Southern Power's available generating capacity) are accounted for as executory contracts. For contracts that have a capacity charge, the revenue is generally recognized in the period that it becomes billable. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. See Note 4 to the financial statements for additional information.
Cash Flow Hedge Transactions
Southern Power further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and
Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Derivative (Non-Hedge) Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Acquisition Accounting (Southern Power)
Southern Power may acquire generation assets as part of its overall growth strategy. At the time of an acquisition, Southern Power will assess if these assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, the purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets, primarily related to acquired PPAs). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired.
Determining the fair value of assets acquired and liabilities assumed requires management judgment and Southern Power may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions, and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by Southern Power for potential or successful acquisitions are expensed as incurred.
Contingent consideration primarily relates to fixed amounts due to the seller once the facility is placed in service. For contingent consideration with variable payments, Southern Power fair values the arrangement with any changes recorded in the consolidated statements of income. See Note 13 to the financial statements for additional fair value information and Note 15 to the financial statements for additional information on recent acquisitions.
Variable Interest Entities (Southern Power)
Southern Power enters into partnerships with varying ownership structures. Upon entering into such arrangements, membership interests and other variable interests are evaluated to determine if the legal entity is a VIE. If the legal entity is a VIE, Southern Power will assess if it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE, making it the primary beneficiary. Making this determination may require significant management judgment.
If Southern Power is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. If Southern Power is not the primary beneficiary, the legal entity is generally accounted for under the equity method of accounting. Southern Power reconsiders its conclusions as to whether the legal entity is a VIE and whether it is the primary beneficiary for events that impact the rights of variable interests, such as ownership changes in membership interests.
Southern Power has partial ownership in certain legal entities for which the contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits couldare not based on fixed ownership percentages. For these arrangements, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change within 12 months. in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period.
Contingent Obligations (All Registrants)
The settlementRegistrants are subject to a number of federal and state auditslaws and regulations, as well as other factors and conditions that subject them to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. The Registrants periodically evaluate their exposure to such risks and record reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could impactmaterially affect the balances. At this time, an estimateresults of operations, cash flows, or financial condition of the rangeRegistrants.
Recently Issued Accounting Standards
See Note 1 to the financial statements under "Recently Adopted Accounting Standards" for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of reasonably possible outcomes cannot be determined.expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. The Registrants adopted the new standard effective January 1, 2019. See Note 9 to the financial statements for additional information and related disclosures.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

FINANCIAL CONDITION AND LIQUIDITY
Overview
The IRS has finalizedfinancial condition of each Registrant remained stable at December 31, 2019. The Registrants' cash requirements primarily consist of funding ongoing operations, including unconsolidated subsidiaries, as well as common stock dividends, capital expenditures, and debt maturities. Southern Power's cash requirements also include distributions to noncontrolling interests. Capital expenditures and other investing activities for the traditional electric operating companies include investments to meet projected long-term demand requirements, including to build new generation facilities, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Southern Power's capital expenditures and other investing activities may include acquisitions or new construction associated with its auditsoverall growth strategy and to maintain its existing generation fleet's performance. Southern Company Gas' capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations.
Operating cash flows provide a substantial portion of the Registrants' cash needs. During 2019, Southern Power utilized tax credits, which provided $734 million in operating cash flows. For the three-year period from 2020 through 2022, each Registrant's projected stock dividends, capital expenditures, and debt maturities, as well as distributions to noncontrolling interests for Southern Power, are expected to exceed its operating cash flows. Southern Company plans to finance future cash needs in excess of its operating cash flows primarily by accessing borrowings from financial institutions and issuing debt and hybrid securities in the capital markets. Each Subsidiary Registrant plans to finance its future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings through the FFB and Southern Power plans to utilize tax equity partnership contributions. The Registrants plan to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs and continue to monitor their access to short-term and long-term capital markets as well as their bank credit arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," "Capital Requirements," and "Contractual Obligations" herein for additional information.
The Registrants' investments in their qualified pension plans and Alabama Power's and Georgia Power's investments in their nuclear decommissioning trust funds increased in value at December 31, 2019 as compared to December 31, 2018. In December 2019, the Registrants voluntarily contributed the following amounts to the qualified pension plan:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Contributions to qualified pension plan$1,136
$362
$200
$54
$24
$145
No mandatory contributions to the qualified pension plans are anticipated during 2020. See "Contractual Obligations" herein and Notes 6 and 11 to the financial statements under "Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
At the end of 2019, the market price of Southern Company's consolidated federal income tax returns through 2012. Southern Company has filed its 2013, 2014,common stock was $63.70 per share (based on the closing price as reported on the NYSE) and 2015 federal income tax returnsthe book value was $26.11 per share, representing a market-to-book value ratio of 244%, compared to $43.92, $23.91, and has received partial acceptance letters from184%, respectively, at the IRS; however, the IRS has not finalized its audits. Southern Company is a participant in the Compliance Assurance Processend of the IRS. The audits for the Company's state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2011.2018.
6. FINANCING
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Long-Term Debt Payable
COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Analysis of Cash Flows
Net cash flows provided from (used for) operating, investing, and financing activities in 2019 and 2018 are presented in the following table:
Net cash provided from (used for):Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Operating activities$5,781
$1,779
$2,907
$339
$1,385
$1,067
Investing activities(3,392)(1,963)(3,885)(263)(167)(1,386)
Financing activities(1,930)765
918
(83)(1,120)298
       
2018      
Operating activities$6,945
$1,881
$2,769
$804
$631
$764
Investing activities(5,760)(2,289)(3,109)(232)(227)998
Financing activities(1,813)177
(400)(527)(363)(1,770)
Fluctuations in cash flows from financing activities vary from year to an Affiliated Trustyear based on capital needs and the maturity or redemption of securities.
Southern Company
Net cash provided from operating activities decreased $1.2 billion in 2019 as compared to 2018 primarily due to the voluntary contribution to the qualified pension plan and the timing of vendor payments.
The Company has formed a wholly-owned trust subsidiarynet cash used for the purpose of issuing preferred securities. The proceeds of the related equity investmentsinvesting activities in 2019 and preferred security sales were loaned back2018 was primarily due to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, and capital expenditures for Southern Company throughGas' infrastructure replacement programs, partially offset by proceeds from the sale transactions described in Note 15 to the financial statements, which totaled $5.1 billion and $3.0 billion in 2019 and 2018, respectively.
The net cash used for financing activities in 2019 was primarily due to common stock dividend payments and net repayments of short-term bank debt and commercial paper, partially offset by net issuances of long-term debt and the issuance of junior subordinated notes totaling $206 million ascommon stock. The net cash used for financing activities in 2018 was primarily due to net redemptions and repurchases of December 31, 2016long-term debt, common stock dividend payments, and 2015, which constitutea decrease in commercial paper borrowings, partially offset by net issuances of short-term bank debt, proceeds from Southern Power's sales of non-controlling equity interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities, and the assetsissuance of this trustcommon stock.
Alabama Power
Net cash provided from operating activities decreased $102 million in 2019 as compared to 2018primarily due to the voluntary contribution to the qualified pension plan, partially offset by the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and are reflectedincreased fuel cost recovery.
The net cash used for investing activities in the balance sheets as2019 and 2018 was primarily due to gross property additions.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and a long-term debt payable.issuance, partially offset by payments of common stock dividends and a maturity of long-term debt. The net cash provided from financing activities in 2018 was primarily due to issuances of long-term debt and additional capital contributions from Southern Company, considers thatpartially offset by the mechanismspayment of common stock dividends and obligations relatinga maturity of long-term debt.
Georgia Power
Net cash provided from operating activities increased $138 million in 2019 as compared to 2018 primarily due to lower customer refunds and increased fuel cost recovery, partially offset by the voluntary contribution to the preferred securities issuedqualified pension plan.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The net cash used for its benefit, taken together, constituteinvesting activities in 2019 and 2018 was primarily due to gross property additions, including a fulltotal of $2.5 billion related to the construction of Plant Vogtle Units 3 and unconditional guarantee by it of the trust's payment obligations with respect to these securities. At December 31, 2016 and 2015, trust preferred securities of $200 million were outstanding.4. See Note 1 under "Variable Interest Entities"FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein for additional information on construction of Plant Vogtle Units 3 and 4.
The net cash provided from financing activities in 2019 was primarily due to borrowings from the accounting treatmentFFB for this trustconstruction of Plant Vogtle Units 3 and 4, issuances of senior notes, capital contributions from Southern Company, and pollution control revenue bonds reoffered to the public, partially offset by payment of common stock dividends and the maturity of senior notes. The net cash used for financing activities in 2018 was primarily due to the redemption and repurchase of senior notes, payment of common stock dividends, and pollution control revenue bond repurchases, partially offset by capital contributions from Southern Company.
Mississippi Power
Net cash provided from operating activities decreased $465 million in 2019 as compared to 2018 primarily due to higher income tax refunds in 2018 as a result of the tax impact of the abandonment of the Kemper IGCC and the voluntary contribution to the qualified pension plan in 2019.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash used for financing activities in 2019 was primarily due to a return of capital to Southern Company and the redemption of senior notes, partially offset by capital contributions from Southern Company and pollution control revenue bonds reoffered to the public. The net cash used for financing activities in 2018 was primarily due to the redemption of preferred stock, long-term bank debt, short-term borrowings, and senior notes, partially offset by the issuance of senior notes and short-term borrowings.
Southern Power
Net cash provided from operating activities increased $754 million in 2019 as compared to 2018 primarily due to the utilization of federal ITCs totaling $734 million in 2019. At December 31, 2019, Southern Power had $1.4 billion of unutilized ITCs and PTCs which are expected to be fully utilized by 2024. See FUTURE EARNINGS POTENTIAL – "Income Tax MattersTax Credits" herein for additional information.
The net cash used for investing activities in 2019 was primarily due to Southern Power's investment in DSGP and ongoing construction activities, largely offset by proceeds from the sales of Plant Nacogdoches and certain wind turbine equipment. The net cash used for investing activities in 2018 was primarily due to the construction of generating facilities and payments for renewable acquisitions, partially offset by proceeds from the disposition of the Florida Plants. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions" and "Construction Programs" herein and Note 15 to the financial statements for additional information.
The net cash used for financing activities in 2019 was primarily due to returns of capital to Southern Company, the repayment at maturity of senior notes, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by proceeds from net issuances of commercial paper. The net cash used for financing activities in 2018 was primarily due to returns of capital to Southern Company, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by capital contributions from noncontrolling interests.
Southern Company Gas
Net cash provided from operating activities increased $303 million in 2019 as compared to 2018 primarily due to the timing of collection of customer receivables and lower income tax payments, partially offset by the timing of vendor payments and the voluntary contribution to the qualified pension plan.
The net cash used for investing activities in 2019 was primarily due to gross property additions related securities.to utility capital expenditures and infrastructure investments recovered through replacement programs at gas distribution operations and capital contributed to equity method pipeline investments, partially offset by proceeds from the sale of Triton and capital distributions in excess of earnings from equity method pipeline investments. The net cash provided from investing activities in 2018 was primarily due to proceeds from the Southern Company Gas Dispositions, partially offset by gross property additions primarily related to utility capital expenditures and pre-approved rider and infrastructure investments recovered through replacement programs at gas distribution operations as well as net capital contributions to equity method pipeline investments.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and proceeds from the issuance of first mortgage bonds, partially offset by the redemption of long-term debt and payments of common stock dividends. The net cash used for financing activities in 2018 was primarily due to payments of common stock dividends to
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Securities Due Within One YearSouthern Company, return of capital to Southern Company, redemptions of gas facility revenue bonds and senior notes, and repayments of commercial paper borrowings and long-term debt, partially offset by debt issuances and capital contributions from Southern Company.
At December 31, 2016
Significant Balance Sheet Changes
Southern Company
Significant balance sheet changes in 2019 for Southern Company included:
decreases in assets and 2015,liabilities held for sale of $5.0 billion and $3.3 billion, respectively, and an increase of $2.7 billion in total stockholders' equity primarily related to the sale of Gulf Power;
an increase of $2.3 billion in total property, plant, and equipment primarily related to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, net of $1.2 billion and $1.0 billion reclassified to other regulatory assets and regulatory assets associated with AROs, respectively, as a result of generating unit retirements at Alabama Power and Georgia Power;
an increase in other regulatory assets of $1.8 billion primarily related to the $1.2 billion reclassification from property, plant, and equipment discussed above and a $0.8 billion increase in regulatory assets associated with retiree benefit plans primarily resulting from a decrease in the overall discount rate used to calculate benefit obligations;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.8 billion, recorded upon the adoption of ASC 842;
an increase of $1.4 billion in regulatory assets associated with AROs primarily related to the $1.0 billion reclassification from property, plant, and equipment discussed above and ARO revisions at Alabama Power and Mississippi Power related to the CCR Rule;
an increase of $1.3 billion in accumulated deferred income taxes primarily related to the expected utilization of tax credit carryforwards in the 2019 tax year as a result of increased taxable income from the sale of Gulf Power; and
a decrease of $0.9 billion in notes payable related to net repayments of short-term bank debt and commercial paper.
See Notes 2, 5, 6, 8, 9, 10, 11, and 15 to the financial statements for additional information.
Alabama Power
Significant balance sheet changes in 2019 for Alabama Power included:
an increase of $1.5 billion in total common stockholder's equity primarily due to a $1.2 billion capital contribution from Southern Company;
increases of $0.9 billion in regulatory assets associated with AROs and $0.7 billion in other regulatory assets, deferred primarily due to the impacts of retiring and reclassifying Plant Gorgas Units 8, 9, and 10;
an increase of $0.6 billion in cash and cash equivalents; and
an increase of $0.3 billion in AROs, deferred primarily due to an increase in the ARO estimate related to ash pond facilities.
See Notes 2 and 6 to the financial statements for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company had $561 million and $200 million, respectively,Subsidiary Companies 2019 Annual Report

Georgia Power
Significant balance sheet changes in 2019 for Georgia Power included:
an increase of $1.8 billion in long-term debt (including securities due within one year) primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, and pollution control revenue bonds being reoffered to the public;
an increase of $1.6 billion in property, plant, and equipment to comply with environmental standards and the construction of generation, transmission, and distribution facilities, net of approximately $0.8 billion reclassified to regulatory assets due to the retirement of certain generating units as approved in the Georgia Power 2019 IRP;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.4 billion, recorded upon the adoption of ASC 842;
an increase of $1.2 billion in regulatory assets primarily due to the $0.8 billion reclassification from property, plant, and equipment discussed above and $0.2 billion associated with retiree benefit plans primarily as a result of a decrease in the overall discount rate used to calculate benefit obligations; and
an increase of $742 million in total common stockholder's equity primarily due to capital contributions from Southern Company.
See Notes 2, 8, 9, and 11 to the financial statements for additional information.
Mississippi Power
Significant balance sheet changes in 2019 for Mississippi Power included:
a decrease of $231 million in long-term debt, primarily due to the reclassification of $249 million of senior notes to securities due within one year.
Maturities through 2021 applicable to total long-term debt are as follows: $561year and the redemption of $25 million in 2017; $200of senior notes, partially offset by $43 million in 2019; $250 million in 2020; and $310 million in 2021. There are no material scheduled maturities in 2018.
Bank Term Loans
In March 2016, the Company entered into three bank term loan agreements with maturity dates of March 2021, in an aggregate principal amount of $45 million, one of which bears interest at 2.38% per annum and two of which bear interest based on three-month LIBOR.
These bank loans have covenants that limit debt levels to 65% of total capitalization, as defined in the agreements. For purposes of calculating these covenants, any long-term notes payable to affiliated trusts are excluded from debt but included in capitalization. At December 31, 2016, the Company was in compliance with its debt limits.
Pollution Control Revenue Bonds
Pollution control revenue bond obligations represent loans to the Company from public authorities of funds or installment purchases of pollution control and solid waste disposal facilities financed by funds derived from sales by public authorities of revenue bonds. The Company is required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. The Company incurred no obligations related to the issuance of pollution control revenue bonds reoffered to the public;
an increase of $107 million in 2016.other property and investments primarily due to a new tolling arrangement accounted for as a sales-type lease;
The Company had $1.1 billionincreases of tax-exempt pollution control revenue bond obligations outstanding at each$67 million in regulatory assets associated with AROs and $31 million in AROs, deferred primarily due to ARO revisions; and
a net change of $57 million in accumulated deferred income tax assets and liabilities primarily due to the recognition of a tax loss on the CO2 pipeline transfer and the alternative minimum tax carryforward from prior years.
See Notes 2, 6, 8, 9, and 10 to the financial statements for additional information.
Southern Power
Significant balance sheet changes in 2019for Southern Power included:
a $662 million decrease in stockholders' equity due to returns of December 31, 2016 and 2015, including pollution control revenue bondscapital to Southern Company;
a $635 million decrease in accumulated deferred income tax assets primarily related to the utilization of tax credits for the 2019 tax year;
a $619 million decrease in long-term debt (including securities due within one year.year) related to the maturity of $600 million in senior notes;
Seniora $449 million increase in notes payable due to net issuances of commercial paper; and
increases in operating lease right-of-use assets, net of amortization and operating lease obligations totaling $369 million and $376 million, respectively, recorded upon the adoption of ASC 842.
See Notes 8, 9, and 10 to the financial statements for additional information.
Southern Company Gas
Significant balance sheet changes in 2019 for Southern Company Gas included:
an increase of $950 million in property, plant, and equipment primarily due to utility capital expenditures and infrastructure investments recovered through replacement programs, partially offset by $115 million of asset impairment charges;
additional paid-in-capital of $841 million primarily related to capital contributions from Southern Company;
decreases of $373 million and $414 million in energy marketing receivables and payables, respectively, due to lower natural gas prices and volumes of natural gas sold;
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

a $287 million decrease in equity investments in unconsolidated subsidiaries primarily due to $151 million associated with Pivotal LNG and Atlantic Coast Pipeline reclassified to assets held for sale, as well as distributions from SNG and the sale of Triton;
a $203 million increase in accumulated deferred income taxes primarily due to accelerated tax depreciation and other timing differences;
reclassification of $171 million in total assets held for sale associated with Pivotal LNG and Atlantic Coast Pipeline;
a $95 million decrease in long-term debt primarily due to the redemption of $300 million in senior notes and the repayment of $50 million in first mortgage bonds, partially offset by the issuance of $300 million in first mortgage bonds; and
increases of $93 million in operating right-of-use assets and $92 million in operating lease obligations, respectively, related to the adoption of ASC 842.
See Notes 3, 7, 8, 9, 10, and 15 to the financial statements for additional information.
Sources of Capital
Southern Company intends to meet its future capital needs through operating cash flows, borrowings from financial institutions, and debt and equity issuances in the capital markets. Equity capital can be provided from any combination of Southern Company's stock plans, private placements, or public offerings. Southern Company does not expect to issue any equity in the capital markets through 2024.
The Subsidiary Registrants plan to obtain the funds to meet their future capital needs from sources similar to those they used in the past, which were primarily from operating cash flows, external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In January 2016,addition, Georgia Power plans to utilize borrowings from the FFB, as discussed further in Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings," Southern Power plans to utilize tax equity partnership contributions, as discussed further herein, and Southern Company issued $400 million aggregate principalGas plans to utilize proceeds from the pending sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, as discussed further in Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline."
The amount, type, and timing of Series 2016A 4.30% Senior Notes due January 2, 2046. The proceeds were used to repay at maturity $200 million aggregate principal amountany financings in 2020, as well as in subsequent years, will be contingent on investment opportunities and the Registrants' capital requirements and will depend upon prevailing market conditions, regulatory approvals (for the Subsidiary Registrants), and other factors. See "Capital Requirements" herein for additional information.
Southern Power utilizes tax equity partnerships as one of its financing sources, where the tax partner takes significantly all of the Company's Series FF 5.20% Seniorfederal tax benefits. These tax equity partnerships are consolidated in Southern Power's financial statements and are accounted for using HLBV methodology to allocate partnership gains and losses. During 2019, Southern Power obtained tax equity funding for the Wildhorse Mountain wind project and received proceeds of $97 million. See Notes due January1 and 15 2016to the financial statements under "General" and "Southern Power," respectively, for general corporate purposes, including the Company's continuous construction program.additional information.
At December 31, 2016 and 2015, the Company had $5.8 billion and $5.6 billion of senior notes outstanding, respectively, including senior notes due within one year. As of December 31, 2016, the Company did not have any outstanding secured debt.
Subsequent to December 31, 2016, the Company repaid at maturity $200 million aggregate principal amount of its Series 2007A 5.55% Senior Notes due February 1, 2017.
Redeemable Preferred and Preference Stock
The Company currently has preferred stock, Class A preferred stock, preference stock,issuance of securities by the traditional electric operating companies and common stock authorized and outstanding. The Company's preferred stock and Class A preferred stock, without preference between classes, rank seniorNicor Gas is generally subject to the Company's preference stock and common stock with respect to payment of dividends and voluntary and involuntary dissolution. The preferred stock and Class A preferred stockapproval of the Company contain a feature that allowsapplicable state PSC or other applicable state regulatory agency. The issuance of all securities by Mississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the holders to elect a majority of the Company's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of the Company, the preferred stock and Class A preferred stock is presented as "Redeemable Preferred Stock" in a manner consistent with temporary equity under applicable accounting standards. The preference stock does not contain such a provision that would allow the holders to elect a majority of the Company's board. The Company's preference stock ranks senior to the common stockFERC. Additionally, with respect to the paymentpublic offering of dividendssecurities, Southern Company, the traditional electric operating companies, and voluntarySouthern Power (excluding its subsidiaries), Southern Company Gas Capital, and Southern Company Gas (excluding its other subsidiaries) file registration statements with the SEC under the Securities Act of 1933, as amended (1933 Act). The amounts of securities authorized by the appropriate regulatory authorities, as well as the securities registered under the 1933 Act, are closely monitored and appropriate filings are made to ensure flexibility in the capital markets.
The Registrants generally obtain financing separately without credit support from any affiliate. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or involuntary dissolution.money pool. Therefore, funds of each company are not commingled with funds of any other company in the Southern Company system, except in the case of Southern Company Gas, as described below.
The traditional electric operating companies and SEGCO may utilize a Southern Company subsidiary organized to issue and sell commercial paper at their request and for their benefit. Proceeds from such issuances for the benefit of an individual company are loaned directly to that company. The obligations of each traditional electric operating company and SEGCO under these arrangements are several and there is no cross-affiliate credit support. Alabama Power also maintains its own separate commercial paper program.
Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. Southern Company Gas maintains commercial
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


The Company's preferred stockpaper programs at Southern Company Gas Capital and Nicor Gas. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is subjectnot permitted to redemption at a price equalmake money pool loans to affiliates. All of the other Southern Company Gas subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
By regulation, Nicor Gas is restricted, to the par value plusextent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2019, the amount of subsidiary retained earnings restricted to dividend totaled $951 million. This restriction did not impact Southern Company Gas' ability to meet its cash obligations, nor does management expect such restriction to materially impact Southern Company Gas' ability to meet its currently anticipated cash obligations.
The Registrants' current liabilities frequently exceed their current assets because of long-term debt maturities and the periodic use of short-term debt as a premium. The Company's Class A preferred stock is subject to redemption at a price equalfunding source, as well as significant seasonal fluctuations in cash needs. See Note 8 to the stated capital. The Company's outstanding preference stock is subjectfinancial statements for additional information. Also see "Financing Activities" herein for information on issuances of long-term debt subsequent to redemption atDecember 31, 2019. At December 31, 2019, the following Registrants' current liabilities exceeded their current assets, primarily as a price equal to the stated capital plus a make-whole premium based on the present valueresult of the liquidation amountsecurities due within one year and future dividends to the first stated capital redemption date. All series of the Company's preferred stock currently are subject to redemption at the option of the Company. Information for each outstanding series isnotes payable, as shown in the table below:
Preferred/Preference StockPar Value/Stated Capital Per Share
Shares Outstanding
Redemption Price Per Share
4.92% Preferred Stock$100
80,000

$103.23
4.72% Preferred Stock$100
50,000

$102.18
4.64% Preferred Stock$100
60,000

$103.14
4.60% Preferred Stock$100
100,000

$104.20
4.52% Preferred Stock$100
50,000

$102.93
4.20% Preferred Stock$100
135,115

$105.00
5.83% Class A Preferred Stock$25
1,520,000

Stated Capital
6.45% Preference Stock$25
6,000,000

Stated Capital(*)
6.50% Preference Stock$25
2,000,000

Stated Capital(*)
At December 31, 2019
Southern Company(*)
Georgia
Power
Mississippi PowerSouthern Power
 (in millions)
Current liabilities in excess of current assets$2,729
$1,902
$125
$945
Securities due within one year2,989
1,025
281
824
Notes payable2,055
365

549
(*)Also includes a make-whole premium prior to October 1, 2017Includes $600 million and $465 million of securities due within one year and notes payable, respectively, at the parent company.
The Registrants believe the need for working capital can be adequately met by utilizing operating cash flows, as well as commercial paper, lines of credit, and short-term bank notes, as market conditions permit. In May 2015,addition, under certain circumstances, the Company redeemed 6.48 million shares ($162 million aggregate stated capital) of the Company's 5.20% Class A Preferred Stock at a redemption price of $25 per share plus accrued and unpaid dividends to the redemption date and 4.0 million shares ($100 million aggregate stated capital) of the Company's 5.30% Class A Preferred Stock at a redemption price of $25 per share plus accrued and unpaid dividends to the redemption date. Additionally, the $5 million of issuance costs were transferredSubsidiary Registrants may utilize equity contributions and/or loans from redeemable preferred stock to common stockholder's equity upon redemption. Also during May 2015, the Company redeemed 6.0 million shares ($150 million aggregate stated capital) of the Company's 5.625% Series Preference Stock at a redemption price of $25 per share plus accrued and unpaid dividends to the redemption date. There were no changes for the years ended December 31, 2016 and 2014 in redeemable preferred stock or preference stock of theSouthern Company.
Dividend Restrictions
The Company can only pay dividends to Southern Company out of retained earnings or paid-in-capital.
Bank Credit Arrangements
At December 31, 2016,2019, the Registrants' unused committed credit arrangements with banks were as follows:
Expires     Expires Within One Year
2017 2018 2020 Total Unused Term Out No Term Out
(in millions)  (in millions) (in millions)
$35
 $500
 $800
 $1,335
 $1,335
 $
 $35
At December 31, 2019
Southern
Company
parent
Alabama PowerGeorgia
Power
Mississippi Power
Southern
 Power(a)
Southern Company Gas(b)
SEGCO
Southern
Company
 (in millions)
Unused committed credit$1,999
$1,328
$1,733
$150
$591
$1,745
$30
$7,576
(a)At December 31, 2019, Southern Power also had a continuing letter of credit facility for standby letters of credit, of which $23 million was unused. Subsequent to December 31, 2019, Southern Power entered into an additional $60 million continuing letter of credit facility for standby letters of credit. Southern Power's subsidiaries are not parties to its bank credit arrangement or to the letter of credit facilities.
(b)Includes $1.245 billion and $500 million at Southern Company Gas Capital and Nicor Gas, respectively.
Most of the bank credit arrangements require payment of a commitment fee based on the unused portion of the commitments or the maintenance of compensating balances with the banks. Commitment fees average less than 1/10 of 1% for the Company. Compensating balances are not legally restricted from withdrawal.
Subject to applicable market conditions, the Company expectsRegistrants, Nicor Gas, and SEGCO expect to renew or replace itstheir bank credit agreementsarrangements as needed, prior to expiration. In connection therewith, the CompanyRegistrants, Nicor Gas, and SEGCO may extend the maturity datedates and/or increase or decrease the lending commitments thereunder.
Most of the Company's bank credit arrangements contain covenants that limit the Company's debt level to 65% of total capitalization, as defined in the arrangements. For purposes of calculating these covenants, any long-term notes payable to affiliated trusts are excluded from debt but included in capitalization. At December 31, 2016, the Company was in compliance with the debt limit covenants.
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NOTES (continued)
Alabama Power Company 2016 Annual Report

A portion of the unused credit with banks is allocated to provide liquidity support to the Company's pollution control revenue bonds of the traditional electric operating companies and the commercial paper programs. The amountprograms of variable rate pollution control revenue bonds outstanding requiring liquidity support was $890 million as of December 31, 2016. In addition, at December 31, 2016, the Company had $87 million of fixed rate pollution control revenue bonds outstanding that were requiredRegistrants, Nicor Gas, and SEGCO. See Note 8 to be remarketed within the next 12 months.financial statements under "Bank Credit Arrangements" for additional information.
Short-term Borrowings
The Company borrowsRegistrants, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. The Company may also makeSouthern Power's subsidiaries are not issuers or obligors under its commercial paper program. Commercial paper and short-term bank term loans are included in notes payable in the balance sheets. Details of the Registrants' short-term borrowings were as follows:
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Short-term Debt at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 December 31, December 31,
 201920182017 201920182017
 (in millions)    
Southern Company$2,055
$2,915
$2,439
 2.1%3.1%1.9%
Alabama Power

3
 

3.7
Georgia Power365
294
150
 2.2
3.1
2.2
Mississippi Power

4
 

3.8
Southern Power549
100
105
 2.2
3.1
2.0
Southern Company Gas:





    
Southern Company Gas Capital$372
$403
$1,243
 2.1%3.1%1.7%
Nicor Gas278
247
275
 1.8
3.0
1.8
Southern Company Gas Total$650
$650
$1,518
 2.0%3.0%1.8%
 
Short-term Debt During the Period(*)
 Average Amount Outstanding 
Weighted Average
Interest Rate
 Maximum Amount Outstanding
 201920182017 201920182017 201920182017
 (in millions)     (in millions)
Southern Company$1,240
$3,377
$2,672
 2.6%2.6%1.5% $2,914
$5,447
$3,668
Alabama Power17
27
25
 2.6
2.3
1.3
 190
258
223
Georgia Power371
139
427
 2.7
2.5
1.8
 935
710
1,460
Mississippi Power
68
18
 
2.0
3.0
 
300
36
Southern Power76
188
232
 2.7
2.5
1.4
 578
385
419
Southern Company Gas:           
Southern Company Gas Capital$302
$520
$723
 2.6%2.3%1.4% $490
$1,361
$1,243
Nicor Gas91
123
176
 2.3
2.2
1.1
 278
275
525
Southern Company Gas Total$393
$643
$899
 2.5%2.3%1.4%    
(*)Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2019, 2018, and 2017.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Financing Activities
The following table outlines the Registrants' long-term debt financing activities for the year ended December 31, 2019:
Company
Senior
Note
Issuances
 
Senior Note
Maturities, Redemptions, and Repurchases
 
Revenue
Bond
Issuances and
Reofferings
of Purchased
Bonds
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities(a)
 (in millions)
Southern Company parent$
 $2,400
 $
 $
 $1,725
 $
Alabama Power600
 200
 
 
 
 1
Georgia Power750
 500
 584
 223
 1,218
 13
Mississippi Power
 25
 43
 
 
 
Southern Power
 600
 
 
 
 
Southern Company Gas
 300
 
 
 300
 50
Other
 
 
 25
 
 17
Elimination(b)

 
 
 
 
 (7)
Southern Company$1,350
 $4,025
 $627
 $248
 $3,243
 $74
(a)Includes reductions in finance lease obligations resulting from cash payments under finance leases.
(b)Represents reductions in affiliate finance lease obligations at Georgia Power, which are eliminated in Southern Company's consolidated financial statements.
Except as otherwise described herein, the Registrants used the proceeds of debt issuances for their redemptions and maturities shown in the table above, to repay short-term indebtedness, and for general corporate purposes, including working capital. The Subsidiary Registrants also used the proceeds for their construction programs.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Registrants plan to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Southern Company
During 2019, Southern Company issued approximately 19.5 million shares of common stock through various other arrangementsemployee equity compensation plans and received proceeds of approximately $844 million.
In addition, in August 2019, Southern Company issued 34.5 million 2019 Series A Equity Units (Equity Units), initially in the form of corporate units (Corporate Units), at a stated amount of $50 per Corporate Unit, for a total stated amount of $1.725 billion. Net proceeds from the issuance were approximately $1.682 billion. Each Corporate Unit is comprised of (i) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019A Remarketable Junior Subordinated Notes due 2024, (ii) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019B Remarketable Junior Subordinated Notes due 2027, and (iii) a stock purchase contract, which obligates the holder to purchase from Southern Company, no later than August 1, 2022, a certain number of shares of Southern Company's common stock for $50 in cash. See Note 8 to the financial statements under "Equity Units" for additional information.
In January 2019, Southern Company repaid a $250 million short-term uncommitted bank credit arrangement and a $1.5 billion short-term floating rate bank loan.
In 2019, Southern Company, through repurchases and redemptions, retired all $1.0 billion aggregate principal amount of its 1.85% Senior Notes due July 1, 2019, $350 million aggregate principal amount of its Series 2014B 2.15% Senior Notes due September 1, 2019, $750 million aggregate principal amount of its Series 2018A Floating Rate Notes due February 14, 2020, and $300 million aggregate principal amount of its Series 2017A Floating Rate Senior Notes due September 30, 2020.
Subsequent to December 31, 2019, Southern Company issued $1.0 billion aggregate principal amount of Series 2020A 4.95% Junior Subordinated Notes due January 30, 2080.
Alabama Power
In February 2019, Alabama Power repaid at maturity $200 million aggregate principal amount of Series Z 5.125% Senior Notes due February 15, 2019.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In September 2019, Alabama Power issued $600 million aggregate principal amount of Series 2019A 3.45% Senior Notes due October 1, 2049.
Subsequent to December 31, 2019, Alabama Power received a capital contribution totaling $610 million from Southern Company.
Georgia Power
In March and December 2019, Georgia Power made borrowings under the multi-advance credit facilities related to the Amended and Restated Loan Guarantee Agreement in an aggregate principal amount of $835 million and $383 million, respectively, with banks. applicable interest rates of 3.213% and 2.537%, respectively, both for an interest period that extends to the final maturity date of February 20, 2044. The proceeds were used to reimburse Georgia Power for Eligible Project Costs relating to the construction of Plant Vogtle Units 3 and 4. See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
In June 2019, Georgia Power entered into two short-term floating rate bank loans in aggregate principal amounts of $125 million each, both of which bear interest based on one-month LIBOR.
In September 2019, Georgia Power issued $400 million aggregate principal amount of Series 2019A 2.20% Senior Notes due September 15, 2024 and $350 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
Subsequent to December 31, 2019, Georgia Power issued $700 million aggregate principal amount of Series 2020A 2.10% Senior Notes due July 30, 2023, $500 million aggregate principal amount of Series 2020B 3.70% Senior Notes due January 30, 2050, and an additional $300 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
During 2019, Georgia Power reoffered to the public the following pollution control revenue bonds that previously had been purchased and were held by Georgia Power at December 31, 2018:
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009;
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013;
$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008;
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994; and
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013.
During 2019, Georgia Power purchased, held, and subsequently reoffered to the public an additional $115 million of pollution control revenue bonds.
In January 2019, Georgia Power redeemed approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In December 2019, Georgia Power repaid at maturity $500 million aggregate principal amount of its Series 2009B 4.25% Senior Notes.
Subsequent to December 31, 2019, Georgia Power received a capital contribution totaling $500 million from Southern Company and announced the redemption of all $500 million aggregate principal amount of its Series 2017C 2.00% Senior Notes due September 8, 2020.
Mississippi Power
In March 2019, Mississippi Power reoffered to the public approximately $43 million of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002, which previously had been purchased and held by Mississippi Power.
In December 2019, Mississippi Power redeemed $25 million aggregate principal amount of its Series 2018A Floating Rate Senior Notes due March 27, 2020.
Southern Power
In May 2019, Southern Power repaid at maturity a $100 million short-term floating rate bank loan.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In December 2019, Southern Power repaid at maturity $600 million aggregate principal amount of its Series 2016D 1.95% Senior Notes.
Also in December 2019, Southern Power entered into a short-term floating rate bank loan in the aggregate principal amount of $100 million, bearing interest based on one-month LIBOR. Subsequent to December 31, 2019, Southern Power repaid the bank loan.
Southern Company Gas
In July 2019, Nicor Gas repaid at maturity $50 million aggregate principal amount of its 4.7% first mortgage bonds.
In August 2019, Southern Company Gas Capital repaid at maturity $300 million aggregate principal amount of its 5.25% Senior Notes.
In August and October 2019, Nicor Gas issued $200 million and $100 million, respectively, aggregate principal amount of first mortgage bonds in a private placement.
Credit Rating Risk
At December 31, 20162019, the Registrants did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change of certain Registrants to BBB and/or Baa2 or below. These contracts are primarily for physical electricity and 2015, there was no short-term debt outstanding. At December 31, 2016, the Company had regulatory approval to have outstanding up to $2.1 billionnatural gas purchases and sales, fuel purchases, fuel transportation and storage, energy price risk management, transmission, interest rate management, and, for Georgia Power, construction of short-term borrowings.new generation at Plant Vogtle Units 3 and 4.
7. COMMITMENTS
Fuel and Purchased Power Agreements
To supply a portion of the fuelThe maximum potential collateral requirements of its generating plants, the Company has entered into various long-term commitments for the procurement and delivery of fossil and nuclear fuel which are not recognized on the balance sheets. In 2016, 2015, and 2014, the Company incurred fuel expense of $1.3 billion, $1.3 billion, and $1.6 billion, respectively, the majority of which was purchased under long-term commitments. The Company expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
In addition, the Company has entered into various long-term commitments for the purchase of capacity and electricity, some of which are accounted for as operating leases. Total capacity expense under PPAs accounted for as operating leases was $42 million, $38 million, and $37 million for 2016, 2015, and 2014, respectively. Total estimated minimum long-term obligationsthese contracts at December 31, 20162019 were as follows:
 
Operating
Lease
PPAs
 (in millions)
2017$40
201841
201943
202044
202146
202247
Total commitments$261
Credit Ratings
Southern Company(*)
Alabama PowerGeorgia PowerMississippi Power
Southern
Power(*)
Southern Company Gas
 (in millions)
At BBB and/or Baa2$36
$1
$
$
$35
$
At BBB- and/or Baa3472
1
86

385

At BB+ and/or Ba1 or below2,040
322
1,020
267
1,174
18
(*)Excludes amounts related to Plant Mankato, which was sold on January 17, 2020. Southern Power has PPAs that could require collateral, but not accelerated payment, in the event of a downgrade of Southern Power's credit. The PPAs require credit assurances without stating a specific credit rating. The amount of collateral required would depend upon actual losses resulting from a credit downgrade. Southern Power had $104 million of cash collateral posted related to PPA requirements at December 31, 2019.
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent forThe potential collateral requirement amounts in the Company and all of the other traditional electric operating companies and Southern Power. Under these agreements, each ofprevious table for the traditional electric operating companies and Southern Power include certain agreements that could require collateral in the event that either Alabama Power or Georgia Power has a credit rating change to below investment grade. Generally, collateral may be jointly and severally liable. Accordingly,provided by a Southern Company has entered into keep-well agreements withguaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the Company and eachability of the other traditional electric operating companiesRegistrants to ensureaccess capital markets and would be likely to impact the Company will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southerncost at which they do so.
Mississippi Power as a contracting partyand its largest retail customer, Chevron, have agreements under these agreements.
Operating Leases
The Company has entered into rental agreements for coal railcars, vehicles, and other equipment with various terms and expiration dates. Total rent expense under these agreements was $18 million in 2016, $19 million in 2015, and $18 million in 2014. Of these amounts, $14 million, $13 million, and $14 million for 2016, 2015, and 2014, respectively, relatewhich Mississippi Power continues to provide retail service to the railcar leasesChevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and was recovered througha downgrade of Mississippi Power's credit rating to below investment grade by two of the Company's Rate ECR. Asthree rating agencies.
On August 1, 2019, Moody's upgraded Mississippi Power's senior unsecured long-term debt rating to Baa2 from Baa3 and maintained the positive rating outlook.
On September 12, 2019, S&P upgraded the senior unsecured long-term debt rating of December 31, 2016, estimated minimum lease payments under operating leases were as follows:Alabama Power to A from A-, the long-term issuer rating of Nicor Gas to A from A-, and the senior secured debt rating of Nicor Gas to A+ from A. The ratings outlooks remained negative.
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NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


 Minimum Lease Payments
 Railcars Vehicles & Other Total
 (in millions)
2017$10
 $4
 $14
20187
 3
 10
20197
 3
 10
20206
 2
 8
20216
 2
 8
2022 and thereafter9
 1
 10
Total$45
 $15
 $60
In addition to the above rental commitments payments, the Company has potential obligations upon expiration of certain leases with respect to the residual value of the leased property. These leases have terms expiring through 2023 with maximum obligations under these leases of $12 million in 2023. There are no obligations under these leases through 2021. At the termination of the leases, the lessee may either exercise its purchase option, or the property can be sold to a third party. The Company expects that the fair market value of the leased property would substantially reduce or eliminate the Company's payments under the residual value obligations.
GuaranteesMarket Price Risk
The Company has guaranteed the obligation of SEGCO for $25 million of pollution control revenue bonds issued in 2001, which mature in June 2019, and also $100 million of senior notes issued in 2013, which mature in December 2018. Georgia Power has agreed to reimburse the Company for the pro rata portion of such obligations corresponding to Georgia Power's then proportionate ownership of SEGCO's stock if the Company is called upon to make such payment under its guarantee. See Note 4 for additional information.
8. STOCK COMPENSATION
Stock-Based Compensation
Stock-based compensation primarily in the form of Southern Company performance share units may be granted through the Omnibus Incentive Compensation Plan to a large segment of the Company's employees ranging from line management to executives. As of December 31, 2016, there were 865 current and former employees participating in the stock option and performance share unit programs.
Stock Options
Through 2009, stock-based compensation granted to employees consisted exclusively of non-qualified stock options. The exercise price for stock options granted equaled the stock price of Southern Company common stock on the date of grant. Stock options vest on a pro rata basis over a maximum period of three years from the date of grant or immediately upon the retirement or death of the employee. Options expire no later than 10 years after the grant date. All unvested stock options vest immediately upon a change in control where Southern Company is not the surviving corporation. Compensation expense is generally recognized on a straight-line basis over the three-year vesting period with the exception of employees thatRegistrants are retirement eligible at the grant date and employees that will become retirement eligible during the vesting period. Compensation expense in those instances is recognized at the grant date for employees that are retirement eligible and through the date of retirement eligibility for those employees that become retirement eligible during the vesting period. In 2015, Southern Company discontinued the granting of stock options.
The weighted average grant-date fair value of stock options granted during 2014 derived using the Black-Scholes stock option pricing model was $2.20.
The compensation cost related to the grant of Southern Company stock options to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. Compensation cost and related tax benefits recognized in the Company's financial statements were not material for any year presented. As of December 31, 2016, the amount of unrecognized compensation cost related to stock option awards not yet vested was immaterial.
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NOTES (continued)
Alabama Power Company 2016 Annual Report


The total intrinsic value of options exercised during the years ended December 31, 2016, 2015, and 2014 was $21 million, $8 million, and $21 million, respectively. No cash proceeds are received by the Company upon the exercise of stock options. The actual tax benefit realized by the Company for the tax deductions from stock option exercises totaled $8 million, $3 million, and $8 million for the years ended December 31, 2016, 2015, and 2014, respectively. Prior to the adoption of ASU 2016-09, the excess tax benefits related to the exercise of stock options were recognized in the Company's financial statements with a credit to equity. Upon the adoption of ASU 2016-09, beginning in 2016, all tax benefits related to the exercise of stock options are recognized in income. As of December 31, 2016, the aggregate intrinsic value for the options outstanding and options exercisable was $30 million and $26 million, respectively.
Performance Share Units
From 2010 through 2014, stock-based compensation granted to employees included performance share units in addition to stock options. Beginning in 2015, stock-based compensation consisted exclusively of performance share units. Performance share units granted to employees vest at the end of a three-year performance period. All unvested performance share units vest immediately upon a change in control where Southern Company is not the surviving corporation. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of performance share units granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
The performance goal for all performance share units issued from 2010 through 2014 was based on the total shareholder return (TSR) for Southern Company common stock during the three-year performance period as compared to a group of industry peers. For these performance share units, at the end of three years, active employees receive shares based on Southern Company's performance while retired employees receive a pro rata number of shares based on the actual months of service during the performance period prior to retirement. The fair value of TSR-based performance share unit awards is determined as of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among the industry peers over the performance period. The Company recognizes compensation expense on a straight-line basis over the three-year performance period without remeasurement.
Beginning in 2015, Southern Company issued two additional types of performance share units to employees in addition to the TSR-based awards. These included performance share units with performance goals based on cumulative earnings per share (EPS) over the performance period and performance share units with performance goals based on Southern Company's equity-weighted ROE over the performance period. The EPS-based and ROE-based awards each represent 25% of total target grant date fair value of the performance share unit awards granted. The remaining 50% of the target grant date fair value consists of TSR-based awards. In contrast to the Monte Carlo simulation model used to determine the fair value of the TSR-based awards, the fair values of the EPS-based awards and the ROE-based awards are based on the closing stock price of Southern Company common stock on the date of the grant. Compensation expense for the EPS-based and ROE-based awards is generally recognized ratably over the three-year performance period initially assuming a 100% payout at the end of the performance period. The TSR-based performance share units, along with the EPS-based and ROE-based awards, vest immediately upon the retirement of the employee. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. The expected payout related to the EPS-based and ROE-based awards is reevaluated annually with expense recognized to date increased or decreased based on the number of shares currently expected to be issued. Unlike the TSR-based awards, the compensation expense ultimately recognized for the EPS-based awards and the ROE-based awards will be based on the actual number of shares issued at the end of the performance period.
For the years ended December 31, 2016, 2015, and 2014, employees of the Company were granted performance share units of 249,065, 214,709, and 176,070, respectively. The weighted average grant-date fair value of TSR-based performance share units granted during 2016, 2015, and 2014, determined using a Monte Carlo simulation model to estimate the TSR of Southern Company's stock among the industry peers over the performance period, was $45.15, $46.42, and $37.54, respectively. The weighted average grant-date fair value of both EPS-based and ROE-based performance share units granted during 2016 and 2015 was $48.86 and $47.78, respectively.
For the years ended December 31, 2016, 2015, and 2014, total compensation cost for performance share units recognized in income was $15 million, $13 million, and $5 million, respectively, with the related tax benefit also recognized in income of $6 million, $5 million, and $2 million, respectively. The compensation cost related to the grant of Southern Company performance share units to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. As of December 31, 2016, $3 million of total unrecognized
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NOTES (continued)
Alabama Power Company 2016 Annual Report

compensation cost related to performance share award units will be recognized over a weighted-average period of approximately 22 months.
9. NUCLEAR INSURANCE
Under the Price-Anderson Amendments Act (Act), the Company maintains agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at Plant Farley. The Act provides funds up to $13.4 billion for public liability claims that could arise from a single nuclear incident. Plant Farley is insured against this liability to a maximum of $375 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. The Company could be assessed up to $127 million per incident for each licensed reactor it operates but not more than an aggregate of $19 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for the Company is $255 million per incident but not more than an aggregate of $38 million to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. The next scheduled adjustment is due no later than September 10, 2018.
The Company is a member of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, the Company has NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses in excess of the $1.5 billion primary coverage. In April 2014, NEIL introduced a new excess non-nuclear policy providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks, with a maximum per occurrence per unit limit of $490 million. After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted in approximately three years. The Company purchases limits based on the projected full cost of replacement power and has elected a 12-week deductible waiting period.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for the Company as of December 31, 2016 under the NEIL policies would be $53 million.
Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate, however, that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the Company or to its debt trustees as may be appropriate under the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered from customers, would be borne by the Company and could have a material effect on the Company's financial condition and results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.
10. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of the Company of what a market participant would use in pricing an asset or liability. If there is little available market data, then the Company's own assumptions are the best available information.
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NOTES (continued)
Alabama Power Company 2016 Annual Report

In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.
As of December 31, 2016, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Energy-related derivatives$
 $20
 $
 $
 $20
Nuclear decommissioning trusts:(*)
         
Domestic equity385
 72
 
 
 457
Foreign equity48
 47
 
 
 95
U.S. Treasury and government agency securities
 21
 
 
 21
Corporate bonds22
 146
 
 
 168
Mortgage and asset backed securities
 19
 
 
 19
Private equity
 
 
 20
 20
Other
 10
 
 
 10
Cash equivalents262
 
 
 
 262
Total$717
 $335
 $
 $20
 $1,072
Liabilities:         
Energy-related derivatives$
 $9
 $
 $
 $9
(*)Excludes receivables related to investment income, pending investment sales, and payables related to pending investment purchases. See Note 1 under "Nuclear Decommissioning" for additional information.
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NOTES (continued)
Alabama Power Company 2016 Annual Report

As of December 31, 2015, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Energy-related derivatives$
 $1
 $
 $
 $1
Nuclear decommissioning trusts:(*)


 

 

   

Domestic equity359
 68
 
 
 427
Foreign equity47
 47
 
 
 94
U.S. Treasury and government agency securities
 27
 
 
 27
Corporate bonds11
 135
 
 
 146
Mortgage and asset backed securities
 18
 
 
 18
Private equity
 
 
 17
 17
Other
 5
 
 
 5
Cash equivalents68
 
 
 
 68
Total$485
 $301
 $
 $17
 $803
Liabilities:         
Interest rate derivatives$
 $15
 $
 $
 $15
Energy-related derivatives
 55
 
 
 55
Total$
 $70
 $
 $
 $70
(*)Excludes receivables related to investment income, pending investment sales, and payables related to pending investment purchases. See Note 1 under "Nuclear Decommissioning" for additional information.
Valuation Methodologies
The energy-related derivatives primarily consist of over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard over-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and occasionally, implied volatility of interest rate options. The interest rate derivatives are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 11 for additional information on how these derivatives are used.
The NRC requires licensees of commissioned nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. For fair value measurements of the investments within the nuclear decommissioning trusts, external pricing vendors are designated for each asset class with each security specifically assigned a primary pricing source. For investments held within commingled funds, fair value is determined at the end of each business day through the net asset value, which is established by obtaining the underlying securities' individual prices from the primary pricing source. See Note 1 under "Nuclear Decommissioning" for additional information.
A market price secured from the primary source vendor is then evaluated by management in its valuation of the assets within the trusts. As a general approach, fixed income market pricing vendors gather market data (including indices and market research reports) and integrate relative credit information, observed market movements, and sector news into proprietary pricing models,
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NOTES (continued)
Alabama Power Company 2016 Annual Report

pricing systems, and mathematical tools. Dealer quotes and other market information, including live trading levels and pricing analysts' judgments, are also obtained when available.
As of December 31, 2016 and 2015, the fair value measurements of private equity investments held in the nuclear decommissioning trusts that are calculated at net asset value per share (or its equivalent) as a practical expedient, as well as the nature and risks of those investments, were as follows:
 
Fair
Value
 
Unfunded
Commitments
 Redemption Frequency 
Redemption
Notice Period
 (in millions)    
As of December 31, 2016$20
 $25
 Not Applicable Not Applicable
As of December 31, 2015$17
 $28
 
Not
Applicable
 Not Applicable
Private equity funds include a fund-of-funds that invests in high quality private equity funds across several market sectors, a fund that invests in real estate assets, and a fund that acquires companies to create resale value. Private equity funds do not have redemption rights. Distributions from these funds will be received as the underlying investments in the funds are liquidated. Liquidations of these investments are expected to occur at various times over the next ten years.
As of December 31, 2016 and 2015, other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt, including securities due within one year:   
2016$7,092
 $7,544
2015$6,849
 $7,192
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates available to the Company.
11. DERIVATIVES
The Company is exposed to market risks, including commodity price risk, interest rate risk, weather risk, and interestoccasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the Companyapplicable company nets itsthe exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company'sapplicable company's policies in areas such as counterparty exposure and risk management practices. The Company'sSouthern Company Gas' wholesale gas operations uses various contracts in its commercial activities that generally meet the definition of derivatives. For the traditional electric operating companies, Southern Power, and Southern Company Gas' other businesses, each company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 10 for additional information. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.
Energy-Related Derivatives
The Company enters into energy-related derivatives to hedge exposures to electricity, gas, and other fuel price changes. However, dueDue to cost-based rate regulationsregulation and other various cost recovery mechanisms, the Company hastraditional electric operating companies and the natural gas distribution utilities that sell natural gas directly to end-use customers continue to have limited exposure to market volatility in energy-relatedinterest rates, foreign currency exchange rates, commodity prices.fuel prices, and prices of electricity. The Company managestraditional electric operating companies and certain of the natural gas distribution utilities manage fuel-hedging programs implemented per the guidelines of their respective state PSCs or other applicable state regulatory agencies to hedge the Alabama PSC,impact of market fluctuations in natural gas prices for customers. Mississippi Power also manages wholesale fuel-hedging programs under agreements with its wholesale customers. Because energy from Southern Power's facilities is primarily sold under long-term PPAs with tolling agreements and provisions shifting substantially all of the responsibility for fuel cost to the counterparties, Southern Power's exposure to market volatility in commodity fuel prices and prices of electricity is generally limited. However, Southern Power has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity. To mitigate residual risks relative to movements in electricity prices, the traditional electric operating companies and Southern Power may enter into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases; however, a significant portion of contracts are priced at market.
Certain of Southern Company Gas' non-regulated operations routinely utilize various types of derivative instruments to economically hedge certain commodity price and weather risks inherent in the natural gas industry. These instruments include a variety of exchange-traded and OTC energy contracts, such as forward contracts, futures contracts, options contracts, and swap agreements. Southern Company Gas' gas marketing services and wholesale gas services businesses also actively manage storage positions through a variety of hedging transactions for the purpose of managing exposures arising from changing natural gas prices. These hedging instruments are used to substantially protect economic margins (as spreads between wholesale and retail natural gas prices widen between periods) and thereby minimize exposure to declining operating margins. Some of these economic hedge activities may not qualify, or may not be designated, for hedge accounting treatment.
The Registrants had no material change in market risk exposure for the year ended December 31, 2019 when compared to the year ended December 31, 2018. See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
The Registrants may enter into interest rate derivatives designated as hedges, which are intended to mitigate interest rate volatility related to forecasted debt financings and existing fixed and floating rate obligations. Outstanding interest rate derivatives at December 31, 2019 are as follows:
At December 31, 2019
Southern Company(*)
Georgia
Power
Southern Company
Gas
 (in millions)
Hedges of forecasted debt$700
$500
$200
Hedges of existing debt1,800


Total$2,500
$500
$200
(*)Includes $1.8 billion of hedges of existing debt at the Southern Company parent.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table provides information related to variable interest rate exposure on long-term debt (including amounts due within one year) at December 31, 2019 for the applicable Registrants:
At December 31, 2019
Southern Company(*)
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
 (in millions, except percentages)
Long-term variable interest rate exposure$4,063
$1,079
$550
$308
$525
Weighted average interest rate on long-term variable interest rate exposure2.38%2.35%1.74%2.51%2.46%
Impact on annualized interest expense of 100 basis point change in interest rates$41
$11
$6
$3
$5
(*)Includes $1.5 billion of long-term variable interest rate exposure at the Southern Company parent entity.
Southern Power Company had foreign currency denominated debt of €1.1 billion at December 31, 2019. Southern Power Company has mitigated its exposure to foreign currency exchange rate risk through the use of financialforeign currency swaps converting all interest and principal payments to fixed-rate U.S. dollars.
The changes in fair value of energy-related derivative contracts which is expectedfor Southern Company and Southern Company Gas for the years ended December 31, 2019 and 2018 are provided in the table below. The fair value of energy-related derivative contracts was not material for the other Registrants.
 
Southern Company(a)
Southern Company Gas(a)
 (in millions)
Contracts outstanding at December 31, 2017, assets (liabilities), net$(163)$(106)
Contracts realized or settled93
66
Current period changes(b)
(131)(127)
Contracts outstanding at December 31, 2018, assets (liabilities), net$(201)$(167)
Contracts realized or settled69
26
Current period changes(b)
105
213
Disposition6

Contracts outstanding at December 31, 2019, assets (liabilities), net$(21)$72
(a)Excludes cash collateral held on deposit in broker margin accounts of $99 million, $277 million, and $193 million at December 31, 2019, 2018, and 2017, respectively, and premium and intrinsic value associated with weather derivatives of $4 million, $8 million, and $11 million at December 31, 2019, 2018, and 2017, respectively.
(b)The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts for natural gas purchased (sold) at December 31, 2019 and 2018 for Southern Company and Southern Company Gas were as follows:
 Southern CompanySouthern Company Gas
 
mmBtu Volume (in millions)
At December 31, 2019:  
Commodity – Natural gas swaps327

Commodity – Natural gas options262
218
Total hedge volume589
218
   
At December 31, 2018:  
Commodity – Natural gas swaps287

Commodity – Natural gas options144
120
Total hedge volume431
120
Table of ContentsIndex to continue to mitigate price volatility.Financial Statements
Energy-related
COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas' derivative contracts are accountedcomprised of both long and short natural gas positions. A long position is a contract to purchase natural gas, and a short position is a contract to sell natural gas. The volumes presented above for under oneSouthern Company Gas represent the net of two methods:long natural gas positions of 4.10 billion mmBtu and short natural gas positions of 3.88 billion mmBtu at December 31, 2019 and the net of long natural gas positions of 4.16 billion mmBtu and short natural gas positions of 4.04 billion mmBtu at December 31, 2018.
For the Southern Company system, the weighted average swap contract cost above market prices was approximately $0.28 and $0.12 per mmBtu at December 31, 2019 and 2018, respectively. The change in option fair value is primarily attributable to the volatility of the market and the underlying change in the natural gas price. Substantially all of the traditional electric operating companies' natural gas hedge gains and losses are recovered through their respective fuel cost recovery clauses.
Regulatory Hedges – Energy-relatedAt December 31, 2019 and 2018, substantially all of the traditional electric operating companies' and certain of the natural gas distribution utilities' energy-related derivative contracts which arewere designated as regulatory hedges relate primarilyand were related to the Company'sapplicable company's fuel-hedging programs, where gainsprogram. Gains and losses associated with regulatory hedges are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expenseexpense/cost of natural gas as they are recovered through their respective cost recovery clause. Gains and losses on energy-related derivatives designated as cash flow hedges, which are used to hedge anticipated purchases and sales, are initially deferred in AOCI before being recognized in income in the same period as the underlying fuel is used in operations and ultimately recovered through the energy cost recovery clause.
Table of ContentsIndex to Financial Statements

NOTES (continued)
Alabama Power Company 2016 Annual Report

Not Designatedhedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
See Note 14 to the financial statements for additional information.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric industry.and natural gas industries. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2016,The Registrants use over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the net volumefair value hierarchy. In addition, Southern Company Gas uses exchange-traded market-observable contracts, which are categorized as Level 1, and contracts that include a combination of observable and unobservable components, which are categorized as Level 3. See Note 13 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts for natural gas positions totaled 74 million mmBtu for theSouthern Company with the longest hedge date of 2020 over which it is hedging its exposure to the variability in future cash flows for forecasted transactions.
Interest Rate Derivatives
Theand Southern Company may also enter into interest rate derivatives to hedge exposure to changes in interest rates. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earningsGas at the same time the hedged transactions affect earnings. The derivatives employed as hedging instruments are structured to minimize ineffectiveness, which is recorded directly to earnings.
At December 31, 2016, there2019 were no interest rate derivatives outstanding.as follows:
 Fair Value Measurements of Contracts at
 December 31, 2019
 
Total
Fair Value
 Maturity
  Year 1 Years 2&3 Years 4&5
 (in millions)
Southern Company       
Level 1(a)
$(53) $(19) $(37) $3
Level 2(b)
18
 42
 (25) 1
Level 314
 10
 1
 3
Southern Company total(c)
$(21) $33
 $(61) $7
        
Southern Company Gas       
Level 1(a)
$(53) $(19) $(37) $3
Level 2(b)
111
 98
 11
 2
Level 314
 10
 1
 3
Southern Company Gas total(c)
$72
 $89
 $(25) $8
(a)Valued using NYMEX futures prices.
(b)Level 2 amounts for Southern Company Gas are valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers.
(c)Excludes cash collateral of $99 million as well as premium and associated intrinsic value associated with weather derivatives of $4 million at December 31, 2019.
The estimated pre-tax losses that will be reclassified from accumulated OCIRegistrants are exposed to interest expense forrisk in the 12-month period ending December 31, 2017 are $6 million. The Company has deferred gains and losses that are expectedevent of nonperformance by counterparties to be amortized into earnings through 2035.
Derivative Financial Statement Presentation and Amounts
The Company enters into energy-related and interest rate derivative contracts, that may contain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. At December 31, 2016, fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with the counterparties. At December 31, 2015, the fair value amounts of derivative instruments were presented gross on the balance sheets.
At December 31, 2016 and 2015, the fair value of energy-related derivatives and interest rate derivatives was reflected on the balance sheets as follows:
 20162015
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 (in millions)
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Other current assets/Other current liabilities$13
$5
$1
$40
Other deferred charges and assets/Other deferred credits and liabilities7
4

15
Total derivatives designated as hedging instruments for regulatory purposes$20
$9
$1
$55
Derivatives designated as hedging instruments in cash flow hedges    
Interest rate derivatives:    
Other current assets/Other current liabilities$
$
$
$15
Gross amounts recognized$20
$9
$1
$70
Gross amounts offset$(8)$(8)$(1)$(1)
Net amounts recognized in the Balance Sheets(*) 
$12
$1
$
$69
(*)At December 31, 2015, the fair value amounts for derivative contracts subject to netting arrangements were presented gross on the balance sheet.
Energy-related derivatives not designated as hedging instruments were immaterial on the balance sheets for 2016 and 2015.
Table of ContentsIndex to Financial Statements

NOTES (continued)
Alabama Power Company 2016 Annual Report

At December 31, 2016 and 2015, the pre-tax effect of unrealized derivative gains (losses) arising from energy-related derivatives designated as regulatory hedging instruments and deferred were as follows:
 Unrealized Losses Unrealized Gains
Derivative Category
Balance Sheet
Location
2016 2015 
Balance Sheet
Location
2016 2015
  (in millions)  (in millions)
Energy-related derivatives:(*)
Other regulatory assets, current$(1) $(40) Other current liabilities$8
 $1
 Other regulatory assets, deferred
 (15) Other regulatory liabilities, deferred4
 
Total energy-related derivative gains (losses) $(1) $(55)  $12
 $1
(*)At December 31, 2016, the unrealized gains and losses for derivative contracts subject to netting arrangements were presented net on the balance sheet. At December 31, 2015, the unrealized gains and losses for derivative contracts were presented gross on the balance sheet.
For the years ended December 31, 2016, 2015, and 2014, the pre-tax effect of interest rate derivatives designated as cash flow hedging instruments on the statements of income was as follows:
Derivatives in Cash Flow Hedging Relationships
Gain (Loss) Recognized in
OCI on Derivative
(Effective Portion)
 Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
  Amount
Derivative Category2016 2015 2014 
Statements of Income
Location
2016 2015 2014
 (in millions)  (in millions)
Interest rate derivatives$(3) $(7) $(8) Interest expense, net of amounts capitalized$(6) $(3) $(3)
There was no material ineffectiveness recorded in earnings for any period presented.
applicable. The pre-tax effect of energy-related derivatives not designated as hedging instruments on the statements of income was not material for any year presented.
Contingent Features
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain affiliated companies.
At December 31, 2016, the fair value of derivative liabilities with contingent features, including certain agreements that could require collateral in the event that one or more Southern Company system power pool participants has a credit rating change to below investment grade because of joint and several liability features underlying these derivatives, was immaterial.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
The Company maintains accounts with certain regional transmission organizations to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, the Company may be required to post collateral. At December 31, 2016, the Company's collateral posted in these accounts was not material.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The CompanyRegistrants only entersenter into agreements and material transactions with counterparties that have
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Registrants do not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements.
Southern Company performs periodic reviews of its leveraged lease transactions, both domestic and international, and the creditworthiness of the lessees, including a review of the value of the underlying leased assets and the credit ratings of the lessees. Southern Company's domestic lease transactions generally do not have any credit enhancement mechanisms; however, the lessees in its international lease transactions have pledged various deposits as additional security to secure the obligations. The lessees in Southern Company's international lease transactions are also required to provide additional collateral in the event of a credit downgrade below a certain level. See Notes 1 and 3 to the financial statements under "Leveraged Leases" and "Other MattersSouthern Company," respectively, for additional information.
Southern Company Gas Value at Risk (VaR)
VaR is the maximum potential loss in portfolio value over a specified time period that is not expected to be exceeded within a given degree of probability. Southern Company Gas' VaR may not be comparable to that of other companies due to differences in the factors used to calculate VaR. Southern Company Gas' VaR is determined on a 95% confidence interval and a one-day holding period, which means that 95% of the time, the risk of loss in a day from a portfolio of positions is expected to be less than or equal to the amount of VaR calculated. The open exposure of Southern Company Gas is managed in accordance with established policies that limit market risk and require daily reporting of potential financial exposure to senior management. Because Southern Company Gas generally manages physical gas assets and economically protects its positions by hedging in the futures markets, Southern Company Gas' open exposure is generally mitigated. Southern Company Gas employs daily risk testing, using both VaR and stress testing, to evaluate the risk of its positions.
Southern Company Gas actively monitors open commodity positions and the resulting VaR and maintains a relatively small risk exposure as total buy volume is close to sell volume, with minimal open natural gas price risk. Based on a 95% confidence interval and employing a one-day holding period, SouthStar's portfolio of positions for all periods presented was immaterial.
Southern Company Gas' wholesale gas services segment had the following VaRs at December 31:
 201920182017
 (in millions)
Period end(*)
$2.6
$6.4
$4.8
Average3.4
3.7
2.0
High(*)
7.0
11.7
4.8
Low2.1
1.2
1.0
(*)The increase in VaR at December 31, 2018 reflects significant natural gas price increases in Sequent's key markets driven by an industry-wide lower-than-normal natural gas storage inventory position and colder-than-normal weather in the middle of fourth quarter 2018. As weather and natural gas prices moderated subsequent to December 31, 2018, VaR reduced.
Credit Risk
Southern Company (except as discussed herein), the traditional electric operating companies, and Southern Power are not exposed to any concentrations of credit risk. Southern Company Gas' exposure to concentrations of credit risk is discussed herein.
Southern Company Gas
Gas Distribution Operations
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 16 Marketers in Georgia. The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of two times a Marketer's highest month's estimated bill from Atlanta Gas Light. For 2019, the four largest Marketers based on customer count, which includes SouthStar, accounted for 21% of Southern Company Gas' adjusted operating margin and 27% of adjusted operating margin for Southern Company Gas' gas distribution operations segment.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Several factors are designed to mitigate Southern Company Gas' risks from the increased concentration of credit that has also established risk managementresulted from deregulation. In addition to the security support described above, Atlanta Gas Light bills intrastate delivery service to Marketers in advance rather than in arrears. Atlanta Gas Light accepts credit support in the form of cash deposits, letters of credit/surety bonds from acceptable issuers, and corporate guarantees from investment-grade entities. Southern Company Gas reviews the adequacy of credit support coverage, credit rating profiles of credit support providers, and payment status of each Marketer. Southern Company Gas believes that adequate policies and controlsprocedures are in place to properly quantify, manage, and report on Atlanta Gas Light's credit risk exposure to Marketers.
Atlanta Gas Light also faces potential credit risk in connection with assignments of interstate pipeline transportation and storage capacity to Marketers. Although Atlanta Gas Light assigns this capacity to Marketers, in the event that a Marketer fails to pay the interstate pipelines for the capacity, the interstate pipelines would likely seek repayment from Atlanta Gas Light.
Wholesale Gas Services
Southern Company Gas has established credit policies to determine and monitor the creditworthiness of counterparties, in orderas well as the quality of pledged collateral. Southern Company Gas also utilizes netting agreements whenever possible to mitigate the Company's exposure to counterparty credit risk. Therefore,When Southern Company Gas is engaged in more than one outstanding derivative transaction with the same counterparty and also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Netting agreements enable Southern Company Gas to net certain assets and liabilities by counterparty. Southern Company Gas also nets across product lines and against cash collateral, provided the netting and cash collateral agreements include such provisions.
Southern Company Gas may require counterparties to pledge additional collateral when deemed necessary. Southern Company Gas conducts credit evaluations and obtains appropriate internal approvals for a counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, Southern Company Gas requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
Certain of Southern Company Gas' derivative instruments contain credit-risk-related or other contingent features that could increase the payments for collateral it posts in the normal course of business when its financial instruments are in net liability positions. At December 31, 2019, for agreements with such features, Southern Company Gas' derivative instruments with liability fair values were immaterial and Southern Company Gas had no collateral posted with derivatives counterparties to satisfy these arrangements.
Southern Company Gas has a concentration of credit risk as measured by its 30-day receivable exposure plus forward exposure. At December 31, 2019, the top 20 counterparties of Southern Company Gas' wholesale gas services segment represented approximately 59%, or $218 million, of its total counterparty exposure and had a weighted average S&P equivalent credit rating of A-, all of which is consistent with the prior year. The S&P equivalent credit rating is determined by a process of converting the lower of the S&P or Moody's ratings to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being D / Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of the financial ratios of that counterparty. To arrive at the weighted average credit rating, each counterparty is assigned an internal ratio, which is multiplied by their credit exposure and summed for all counterparties. The sum is divided by the aggregate total counterparties' exposures, and this numeric value is then converted to a S&P equivalent.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table provides credit risk information related to Southern Company Gas' third-party natural gas contracts receivable and payable positions at December 31:
 Gross Receivables Gross Payables
 2019 2018 2019 2018
 (in millions) (in millions)
Netting agreements in place:       
Counterparty is investment grade$238
 $461
 $127
 $255
Counterparty is non-investment grade1
 5
 43
 95
Counterparty has no external rating175
 314
 272
 505
No netting agreements in place:       
Counterparty is investment grade14
 19
 
 1
Counterparty has no external rating
 2
 
 
Amount recorded in balance sheets$428
 $801
 $442
 $856
Gas Marketing Services
Southern Company Gas obtains credit scores for its firm residential and small commercial customers using a national credit reporting agency, enrolling only those customers that meet or exceed Southern Company Gas' credit threshold. Southern Company Gas considers potential interruptible and large commercial customers based on reviews of publicly available financial statements and commercially available credit reports. Prior to entering into a physical transaction, Southern Company Gas also assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements.
Capital Requirements
Total estimated capital expenditures for the Registrants through 2024 based on their current construction programs are as follows:
 20202021202220232024
 (in billions)
Southern Company(a)(b)(c)(d)
$8.7
$7.3
$6.8
$6.8
$6.2
Alabama Power(b)
2.1
1.8
1.8
1.8
1.6
Georgia Power(c)
4.1
3.4
3.0
2.8
2.7
Mississippi Power0.3
0.2
0.2
0.3
0.2
Southern Power(d)
0.3
0.2
0.1
0.1
0.1
Southern Company Gas1.8
1.6
1.6
1.7
1.6
(a)Includes the Subsidiary Registrants, as well the other subsidiaries.
(b)
Includes amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $0.5 billion for 2020, $0.2 billion for 2021, $0.3 billion for 2022, and $0.1 billion for 2023. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerPetition for Certificate of Convenience and Necessity" herein for additional information.
(c)These amounts include expenditures of approximately $1.6 billion, $0.9 billion, and $0.3 billion for the construction of Plant Vogtle Units 3 and 4 in 2020, 2021, and 2022, respectively.
(d)These amounts do not include approximately $0.5 billion per year for 2020 through 2024 for Southern Power's planned expenditures for plant acquisitions and placeholder growth, which may vary materially due to market opportunities and Southern Power's ability to execute its growth strategy.
These amounts include estimated capital expenditures to comply with environmental laws and regulations, but do not include any potential compliance costs associated with pending regulation of CO2 emissions from fossil fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters" herein for additional information. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel (for Southern Company, Alabama Power, and Georgia Power) and capital expenditures covered under LTSAs.
The traditional electric operating companies also anticipate costs associated with closure and monitoring of ash ponds and landfills in accordance with the CCR Rule and the related state rules, which are reflected in the applicable Registrants' ARO liabilities. Alabama Power's cost estimates are based on closure-in-place for all of its ash ponds. The cost estimates for Georgia
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Power and Mississippi Power are based on a material adverse effect oncombination of closure-in-place for some ash ponds and closure by removal for others. These anticipated costs are likely to change, and could change materially, as assumptions and details pertaining to closure are refined and compliance activities continue. See FUTURE EARNINGS POTENTIAL – "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" herein and Note 6 to the financial statements for additional information. The current estimates of these costs through 2024 are as a resultfollows:
 20202021202220232024
 (in millions)
Southern Company$498
$551
$742
$916
$967
Alabama Power200
217
284
363
386
Georgia Power265
289
391
475
530
Mississippi Power23
29
24
23
20
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of counterparty nonperformance.numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; abnormal weather; delays in construction due to judicial or regulatory action; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. Additionally, Southern Power's planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy. See Note 15 to the financial statements under "Southern Power" for additional information regarding Southern Power's plant acquisitions and construction projects.
The construction program of Georgia Power also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for information regarding Plant Vogtle Units 3 and 4 and additional factors that may impact construction expenditures.
See FUTURE EARNINGS POTENTIAL – "Construction Programs" herein for additional information. Also see "Contractual Obligations" herein for information regarding other future funding requirements of the Registrants.
Table of ContentsIndex to Financial Statements


NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Alabama PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


12. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)Contractual Obligations
Summarized quarterly financialThe following tables present the Registrants' contractual obligations at December 31, 2019. Additional information for 2016 and 2015about these funding requirements is as follows:provided herein.
Quarter Ended
Operating
Revenues
 
Operating
Income
 Net Income After Dividends on Preferred and Preference Stock
 (in millions)
March 2016$1,331
 $333
 $156
June 20161,444
 430
 213
September 20161,785
 650
 351
December 20161,329
 252
 102
      
March 2015$1,401
 $346
 $169
June 20151,455
 398
 200
September 20151,695
 555
 295
December 20151,217
 264
 121
Southern Company2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$2,971
 $5,189
 $2,890
 $33,489
 $44,539
Interest1,677
 3,109
 2,809
 25,986
 33,581
Financial derivative obligations450
 204
 65
 
 719
Operating leases294
 543
 386
 1,609
 2,832
Finance leases31
 47
 33
 246
 357
Pipeline charges, storage capacity, and gas supply725
 1,085
 784
 1,677
 4,271
Purchase commitments –        

Capital7,758
 12,981
 11,989
   32,728
Fuel2,787
 3,491
 1,527
 4,546
 12,351
Purchased power150
 270
 237
 1,725
 2,382
Other406
 618
 530
 2,174
 3,728
ARO settlements498
 1,293
 1,883
   3,674
Other(*)
163
 310
 38
 65
 576
Southern Company system total$17,910
 $29,140
 $23,171
 $71,517
 $141,738
(*)Includes funding requirements related to pension and other postretirement benefit plans, nuclear decommissioning trusts of Georgia Power, and preferred stock dividends of Alabama Power.
In accordance with the adoption of ASU 2016-09 (see Note 1 under "Recently Issued Accounting Standards"), previously reported amounts for income tax expense were reduced by $2 million in the third quarter 2016, $2 million in the second quarter 2016, and $1 million in the first quarter 2016.
The Company's business is influenced by seasonal weather conditions.
Alabama Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$250
 $1,060
 $321
 $6,956
 $8,587
Interest338
 649
 578
 4,985
 6,550
Preferred stock dividends15
 29
 29
 
 73
Financial derivative obligations14
 10
 
 
 24
Operating leases54
 105
 5
 1
 165
Finance leases1
 2
 1
 
 4
Purchase commitments –         
Capital1,502
 2,891
 2,927
   7,320
Fuel959
 1,226
 465
 808
 3,458
Purchased power35
 75
 77
 446
 633
Other39
 81
 62
 243
 425
ARO settlements200
 501
 749
   1,450
Pension and other postretirement benefit plans14
 28
     42
Alabama Power total$3,421
 $6,657
 $5,214
 $13,439
 $28,731

Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

SELECTED FINANCIAL AND OPERATING DATA 2012-2016
Alabama Power Company 2016 Annual Report
 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions)$5,889
 $5,768
 $5,942
 $5,618
 $5,520
Net Income After Dividends
on Preferred and Preference Stock (in millions)
$822
 $785
 $761
 $712
 $704
Cash Dividends on Common Stock (in millions)$765
 $571
 $550
 $644
 $684
Return on Average Common Equity (percent)13.34
 13.37
 13.52
 13.07
 13.10
Total Assets (in millions)(a)(b)
$22,516
 $21,721
 $20,493
 $19,185
 $18,647
Gross Property Additions (in millions)$1,338
 $1,492
 $1,543
 $1,204
 $940
Capitalization (in millions):         
Common stock equity$6,323
 $5,992
 $5,752
 $5,502
 $5,398
Preference stock196
 196
 343
 343
 343
Redeemable preferred stock85
 85
 342
 342
 342
Long-term debt(a)
6,535
 6,654
 6,137
 6,195
 5,890
Total (excluding amounts due within one year)$13,139
 $12,927
 $12,574
 $12,382
 $11,973
Capitalization Ratios (percent):         
Common stock equity48.1
 46.4
 45.8
 44.4
 45.1
Preference stock1.5
 1.5
 2.7
 2.8
 2.9
Redeemable preferred stock0.7
 0.7
 2.7
 2.7
 2.9
Long-term debt(a)
49.7
 51.4
 48.8
 50.1
 49.1
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential1,262,752
 1,253,875
 1,247,061
 1,241,998
 1,237,730
Commercial199,146
 197,920
 197,082
 196,209
 196,177
Industrial6,090
 6,056
 6,032
 5,851
 5,839
Other762
 757
 753
 751
 748
Total1,468,750
 1,458,608
 1,450,928
 1,444,809
 1,440,494
Employees (year-end)6,805
 6,986
 6,935
 6,896
 6,778
Georgia Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$1,014
 $906
 $628
 $9,236
 $11,784
Interest384
 715
 668
 5,070
 6,837
Financial derivative obligations49
 21
 
 
 70
Operating leases205
 395
 359
 831
 1,790
Finance leases28
 49
 50
 134
 261
Purchase commitments –         
Capital3,805
 6,080
 4,966
   14,851
Fuel1,091
 1,401
 629
 3,610
 6,731
Purchased power56
 117
 123
 862
 1,158
Other117
 121
 133
 205
 576
ARO settlements265
 680
 1,006
   1,951
Nuclear decommissioning trust5
 9
 9
 65
 88
Pension and other postretirement benefit plans50
 93
     143
Georgia Power total$7,069
 $10,587
 $8,571
 $20,013
 $46,240
Mississippi Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$282
 $270
 $
 $1,026
 $1,578
Interest68
 102
 83
 542
 795
Financial derivative obligations15
 11
 1
 
 27
Operating leases2
 2
 1
 2
 7
Purchase commitments –         
Capital255
 397
 402
   1,054
Fuel313
 312
 169
 108
 902
Purchased power17
 36
 37
 417
 507
Other28
 58
 69
 230
 385
ARO settlements23
 53
 44
   120
Pension and other postretirement benefits plans7
 14
     21
Mississippi Power total$1,010
 $1,255
 $806
 $2,325
 $5,396
Southern Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$825
 $977
 $290
 $2,339
 $4,431
Interest163
 278
 222
 1,302
 1,965
Financial derivative obligations3
 
 
 
 3
Operating leases29
 50
 52
 888
 1,019
Purchase commitments –         
Capital251
 306
 294
   851
Fuel424
 552
 265
 20
 1,261
Purchased power42
 42
 
 
 84
Other159
 296
 239
 1,481
 2,175
Southern Power total$1,896
 $2,501
 $1,362
 $6,030
 $11,789
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$
 $376
 $400
 $4,659
 $5,435
Interest235
 458
 425
 3,213
 4,331
Financial derivative obligations369
 161
 66
 
 596
Operating leases18
 31
 21
 44
 114
Pipeline charges, storage capacity, and gas supply725
 1,085
 784
 1,677
 4,271
Purchase commitments –        

Capital1,775
 3,191
 3,335
   8,301
Other31
 14
 1
 
 46
Pension and other postretirement benefit plans16
 29
     45
Southern Company Gas total$3,169
 $5,345
 $5,032
 $9,593
 $23,139
Additional information about these funding requirements is provided below:
Long-term debt – Represents scheduled maturities of long-term debt, as well as the related interest. All amounts are reflected based on final maturity dates except for amounts related to Georgia Power's FFB borrowings. The final maturity date for Georgia Power's FFB borrowings is February 20, 2044; however, principal amortization is reflected beginning in February 2020. The interest amounts also include the effects of interest rate derivatives employed to manage interest rate risk and effects of foreign currency swaps employed to manage foreign currency exchange rate risk, as applicable. For Southern Company and Southern Power, debt principal includes a $5 million loss related to Southern Power's foreign currency hedge of €1.1 billion. The Registrants plan to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2019, as reflected in the statements of capitalization for each Registrant. Long-term debt excludes finance lease amounts, which are shown separately. See Note 8 to the financial statements for additional information.
Financial derivative obligations – See Note 14 to the financial statements for additional information.
Operating and finance leases – See Note 9 to the financial statements for additional information. Operating lease commitments may include certain land leases for facilities that may be subject to annual price escalation based on indices. Estimated lease payments for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $1 million for 2021, $2 million for 2022, $3 million for 2023, $4 million for 2024, and $85 million for after 2024. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information.
Purchase commitments – Capital – Estimated capital expenditures are provided for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel, capital expenditures covered under LTSAs, and estimated capital expenditures for AROs, which are reflected in the "fuel," "other," and "ARO settlements" categories, respectively, where applicable. Estimated capital expenditures for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $0.5 billion for 2020, $0.2 billion for 2021, $0.3 billion for 2022, and $0.1 billion for 2023. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information. Estimated capital expenditures for Southern Company and Southern Power exclude approximately $0.5 billion per year for 2020 through 2024 for Southern Power's planned expenditures for plant acquisitions and placeholder growth. At December 31, 2019, significant purchase commitments were outstanding in connection with the Registrants' construction programs. See FUTURE EARNINGS POTENTIAL ��� "Environmental Matters" and "Construction Programs" herein and "Capital Requirements" herein for additional information.
Purchase commitments – Fuel – Primarily includes commitments to purchase coal (for the traditional electric operating companies), natural gas (for the traditional electric operating companies and Southern Power), and nuclear fuel (for Alabama Power and Georgia Power), as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the NYMEX future prices at December 31, 2019.
Purchase commitments – Purchased power – Represents estimated minimum obligations for various PPAs for the purchase of capacity and energy, as well as, for Georgia Power, capacity payments related to Plant Vogtle Units 1 and 2. Amounts exclude PPAs accounted for as leases, which are reflected in the "operating leases" and "finance leases" categories, where applicable.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Estimated capacity payments for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $4 million for 2020, $7 million for 2021, $7 million for 2022, $8 million for 2023, $8 million for 2024, and $107 million for after 2024. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information. Mississippi Power's long-term PPAs are associated with solar facilities and only include an energy component. Southern Power's purchased power commitments will be resold under a third-party agreement at cost. See Note 3 to the financial statements under "Guarantees" for additional information.
Purchase commitments – Other – Includes LTSAs (for all Registrants), contracts for the procurement of limestone (for Alabama Power and Georgia Power), contractual environmental remediation liabilities (for Southern Company Gas), operation and maintenance agreements (for Southern Power), and transmission agreements (for Southern Power). LTSAs include price escalation based on inflation indices. Southern Power's transmission commitments are based on the Southern Company system's current tariff rate for point-to-point transmission.
Pension and other postretirement benefit plans – The Southern Company system provides postretirement benefits to the majority of its employees and funds trusts to the extent required by PSCs, other applicable state regulatory agencies, or the FERC. The Registrants forecast contributions to their pension and other postretirement benefit plans over a three-year period. The Registrants anticipate no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from corporate assets of the applicable subsidiaries. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from corporate assets of the applicable subsidiaries.
ARO settlements – Represents estimated costs for a five-year period associated with closing and monitoring ash ponds at the traditional electric operating companies in accordance with the CCR Rule and the related state rules, which are reflected in the applicable Registrants' ARO liabilities. Material expenditures in future years for ARO settlements also will be required for ash ponds, nuclear decommissioning (for Alabama Power and Georgia Power), and other liabilities reflected in the applicable Registrants' AROs. See Note 6 to the financial statements for additional information.
Preferred stock dividends – Represents preferred stock of Alabama Power. Preferred stock does not mature; therefore, amounts are provided for the next five years only.
Nuclear decommissioning trusts – As a result of NRC requirements, Alabama Power and Georgia Power have external trust funds for nuclear decommissioning costs. Based on its most recent site study completed in 2018, Alabama Power currently has no additional funding requirements. Alabama Power's next site study is expected to be conducted by 2023. Georgia Power's projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2019 ARP. See Note 6 to the financial statements under "Nuclear Decommissioning" for additional information.
Pipeline charges, storage capacity, and gas supply – Includes charges at Southern Company Gas recoverable through a natural gas cost recovery mechanism, or alternatively billed to Marketers selling retail natural gas, and demand charges associated with Sequent. The gas supply balance includes amounts for Nicor Gas and SouthStar gas commodity purchase commitments of 45 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2019 and valued at $84 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries, including SouthStar, in support of payment obligations.
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Item 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
INDEX TO 2019 FINANCIAL STATEMENTS
(a)A reclassification of debt issuance costs from Total Assets to Long-term debt of $40 million, $38 million, and $39 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.Page
(b)A reclassification






















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SELECTED FINANCIAL AND OPERATING DATA 2012-2016 (continued)
Alabama Power Company 2016 Annual Report
 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions):
         
Residential$2,322
 $2,207
 $2,209
 $2,079
 $2,068
Commercial1,627
 1,564
 1,533
 1,477
 1,491
Industrial1,416
 1,436
 1,480
 1,369
 1,346
Other(43) 27
 27
 27
 28
Total retail5,322
 5,234
 5,249
 4,952
 4,933
Wholesale — non-affiliates283
 241
 281
 248
 277
Wholesale — affiliates69
 84
 189
 212
 111
Total revenues from sales of electricity5,674
 5,559
 5,719
 5,412
 5,321
Other revenues215
 209
 223
 206
 199
Total$5,889
 $5,768
 $5,942
 $5,618
 $5,520
Kilowatt-Hour Sales (in millions):
         
Residential18,343
 18,082
 18,726
 17,920
 17,612
Commercial14,091
 14,102
 14,118
 13,892
 13,963
Industrial22,310
 23,380
 23,799
 22,904
 22,158
Other208
 201
 211
 211
 214
Total retail54,952
 55,765
 56,854
 54,927
 53,947
Wholesale — non-affiliates3,597
 3,567
 3,588
 3,711
 4,196
Wholesale — affiliates5,324
 4,515
 6,713
 7,672
 4,279
Total63,873
 63,847
 67,155
 66,310
 62,422
Average Revenue Per Kilowatt-Hour (cents):
         
Residential12.66
 12.21
 11.80
 11.60
 11.74
Commercial11.55
 11.09
 10.86
 10.63
 10.68
Industrial6.35
 6.14
 6.22
 5.98
 6.07
Total retail9.68
 9.39
 9.23
 9.02
 9.14
Wholesale3.95
 4.02
 4.56
 4.04
 4.58
Total sales8.88
 8.71
 8.52
 8.16
 8.52
Residential Average Annual
Kilowatt-Hour Use Per Customer
14,568
 14,454
 15,051
 14,451
 14,252
Residential Average Annual
Revenue Per Customer
$1,844
 $1,764
 $1,775
 $1,676
 $1,674
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
11,797
 11,797
 12,222
 12,222
 12,222
Maximum Peak-Hour Demand (megawatts):
         
Winter10,282
 12,162
 11,761
 9,347
 10,285
Summer10,932
 11,292
 11,054
 10,692
 11,096
Annual Load Factor (percent)
63.5
 58.4
 61.4
 64.9
 61.3
Plant Availability (percent):
         
Fossil-steam83.0
 81.5
 82.5
 87.3
 88.6
Nuclear88.0
 92.1
 93.3
 90.7
 94.5
Source of Energy Supply (percent):
         
Coal47.1
 49.1
 49.0
 50.0
 48.2
Nuclear20.3
 21.3
 20.7
 20.3
 22.6
Hydro4.8
 5.6
 5.5
 8.1
 4.1
Gas17.1
 14.6
 15.4
 15.7
 16.8
Purchased power —         
From non-affiliates4.8
 4.4
 3.6
 2.9
 2.0
From affiliates5.9
 5.0
 5.8
 3.0
 6.3
Total100.0
 100.0
 100.0
 100.0
 100.0
Page

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GEORGIA POWER COMPANY
FINANCIAL SECTION

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MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Georgia Power Company 2016 Annual Report
The management of Georgia Power Company (the Company) is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of the Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2016.
/s/ W. Paul Bowers
W. Paul Bowers
Chairman, President, and Chief Executive Officer
/s/ W. Ron Hinson
W. Ron Hinson
Executive Vice President, Chief Financial Officer, and Treasurer
February 21, 2017

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). We also have audited Southern Company's internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).
In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of Southern Company as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, Southern Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by COSO.
Basis for Opinions
Southern Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on these financial statements and an opinion on Southern Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.
Definition and Limitations of Internal Control over Financial Reporting
A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
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Critical Audit Matters
The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the Audit Committee of Southern Company's Board of Directors and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.
Impact of Rate Regulation on the Financial Statements – Refer to Note 1 (Summary of Significant Accounting Policies – Regulatory Assets and Liabilities) and Note 2 (Regulatory Matters) to the financial statements
Critical Audit Matter Description
Southern Company's traditional electric operating companies and natural gas distribution utilities (the "regulated utility subsidiaries"), which represent approximately 87% of Southern Company's consolidated operating revenues for the year ended December 31, 2019 and 84% of its consolidated total assets at December 31, 2019, are subject to rate regulation by their respective state Public Service Commissions or other applicable state regulatory agencies and wholesale regulation by the Federal Energy Regulatory Commission (the "Commissions"). Management has determined that the regulated utility subsidiaries meet the requirements under accounting principles generally accepted in the United States of America to utilize specialized rules to account for the effects of rate regulation in the preparation of its financial statements. Accounting for the economics of rate regulation impacts multiple financial statement line items and disclosures, including, but not limited to, property, plant, and equipment; other regulatory assets; other regulatory liabilities; other cost of removal obligations; deferred charges and credits related to income taxes; under and over recovered regulatory clause revenues; operating revenues; operations and maintenance expenses; and depreciation.
The Commissions set the rates the regulated utility subsidiaries are permitted to charge customers based on allowable costs, including a reasonable return on equity. Rates are determined and approved in regulatory proceedings based on an analysis of the applicable regulated subsidiary's costs to provide utility service and a return on, and recovery of, its investment in the utility business. Current and future regulatory decisions can have an impact on the recovery of costs, the rate of return earned on investments, and the timing and amount of assets to be recovered by rates. The Commissions' regulation of rates is premised on the full recovery of prudently incurred costs and a reasonable rate of return on invested capital. While Southern Company's regulated utility subsidiaries expect to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve: (1) full recovery of the costs of providing utility service, or (2) full recovery of all amounts invested in the utility business and a reasonable return on that investment.
We identified the impact of rate regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impacted account balances and disclosures (e.g., asset retirement costs, property damage reserves, and net book value of retired assets) and the high degree of subjectivity involved in assessing the potential impact of future regulatory orders on the financial statements. Management judgments include assessing the likelihood of (1) recovery in future rates of incurred costs, (2) a disallowance of part of the cost of recently completed plant or plant under construction, and/or (3) a refund to customers. Given that management's accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments required specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities and significant auditor judgment to evaluate management estimates and the subjectivity of audit evidence.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:
We tested the effectiveness of management's controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We also tested the effectiveness of management's controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates or of a future reduction in rates.
We read relevant regulatory orders issued by the Commissions for the regulated utility subsidiaries, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future reduction in rates based on precedence of the Commissions' treatment of similar costs under similar circumstances. We evaluated the external information and compared it to management's recorded regulatory asset and liability balances for completeness.
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For regulatory matters in process, we inspected filings with the Commissions by both Southern Company's regulated utility subsidiaries and other interested parties that may impact the regulated utility subsidiaries' future rates for any evidence that might contradict management's assertions.
We evaluated regulatory filings for any evidence that intervenors are challenging full recovery of the cost of any capital projects. We tested selected costs included in the capitalized project costs for completeness and accuracy.
We obtained representation from management regarding probability of recovery for regulatory assets or refund or future reduction in rates for regulatory liabilities to assess management's assertion that amounts are probable of recovery, refund, or a future reduction in rates.
We evaluated Southern Company's disclosures related to the impacts of rate regulation, including the balances recorded and regulatory developments.
Disclosure of Uncertainties – Plant Vogtle Units 3 and 4 Construction – Refer to Note 2 (Regulatory Matters – Georgia Power – Nuclear Construction) to the financial statements
Critical Audit Matter Description
As discussed in Note 2 to the financial statements, the ultimate recovery of Georgia Power Company's (Georgia Power) investment in the construction of Plant Vogtle Units 3 and 4 is subject to multiple uncertainties. Such uncertainties include the potential impact of future decisions by Georgia Power's regulators (particularly the Georgia Public Service Commission), actions by the co-owners of the Vogtle project, and litigation or other legal proceedings involving the project. In addition, Georgia Power's ability to meet its cost and schedule forecasts could impact its capacity to fully recover its investment in the project. While the project is not subject to a cost cap, Georgia Power's cost and schedule forecasts are subject to numerous uncertainties which could impact cost recovery, including challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues that could arise and change the projected schedule and estimated cost. The ultimate recovery of Georgia Power's investment in Plant Vogtle Units 3 and 4 is subject to the outcome of future assessments by management as well as Georgia Public Service Commission decisions in future regulatory proceedings.
Management has disclosed the status, risks, and uncertainties associated with Plant Vogtle Units 3 and 4, including (1) the status of construction; (2) challenges to the achievement of Georgia Power's cost and schedule forecasts; (3) the status of regulatory proceedings; (4) the status of legal actions or issues involving the co-owners of the project; and (5) other matters which could impact the ultimate recoverability of Georgia Power's investment in the project. We identified as a critical audit matter the evaluation of these disclosures which involved significant audit effort requiring specialized industry and construction expertise, extensive knowledge of rate regulation, and difficult and subjective judgments.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the disclosure of the status, risks, and uncertainties of the nuclear construction at Plant Vogtle Units 3 and 4 included the following, among others:
We tested the effectiveness of internal controls over the on-going evaluation and monitoring of the construction schedule and capital cost forecast and over the disclosure of matters related to the construction and ultimate cost recovery of Plant Vogtle Units 3 and 4.
We involved construction specialists to assist in our evaluation of Georgia Power's processes for on-going evaluation and monitoring of the construction schedule and cost forecast and to assess the disclosures of challenges to the achievement of such forecasts.
We attended meetings with Georgia Power and Southern Company officials, project managers (including contractors), independent regulatory monitors, and co-owners of the project to evaluate and monitor construction status and identify cost and schedule challenges.
We read reports of external independent monitors employed by the Georgia Public Service Commission to monitor the status of construction at Plant Vogtle Units 3 and 4 to evaluate the completeness of Georgia Power's disclosure of challenges to the achievement of cost and schedule forecasts.
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We inquired of Georgia Power and Southern Company officials and project managers regarding the status of construction, the construction schedule, and cost forecasts to assess the financial statement disclosures with respect to project status and potential risks and uncertainties to the achievement of such forecasts.
We inspected regulatory filings and transcripts of Georgia Public Service Commission hearings regarding the construction of Plant Vogtle Units 3 and 4 to identify potential challenges to the recovery of Georgia Power's construction costs and to evaluate the disclosures with respect to such uncertainties.
We inquired of Georgia Power and Southern Company management and internal and external legal counsel regarding any potential legal actions or issues arising from project construction or issues involving the co-owners of the project.
We compared the financial statement disclosures relating to this matter to the information gathered through the conduct of all our procedures to evaluate whether there were omissions relating to significant facts or uncertainties regarding the status of construction or other factors which could impact the ultimate cost recovery of Plant Vogtle Units 3 and 4.
We obtained representation from management regarding disclosure of all matters related to the cost and/or status, including matters related to a co-owner or regulatory development, that could result in a potential disallowance of costs related to the construction of Plant Vogtle Units 3 and 4.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company's auditor since 2002.
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CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report

 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail electric revenues$14,084
 $15,222
 $15,330
Wholesale electric revenues2,152
 2,516
 2,426
Other electric revenues636
 664
 681
Natural gas revenues3,792
 3,854
 3,791
Other revenues755
 1,239
 803
Total operating revenues21,419
 23,495
 23,031
Operating Expenses:     
Fuel3,622
 4,637
 4,400
Purchased power816
 971
 863
Cost of natural gas1,319
 1,539
 1,601
Cost of other sales435
 806
 513
Other operations and maintenance5,600
 5,889
 5,739
Depreciation and amortization3,038
 3,131
 3,010
Taxes other than income taxes1,230
 1,315
 1,250
Estimated loss on plants under construction24
 1,097
 3,362
Impairment charges168
 210
 
(Gain) loss on dispositions, net(2,569) (291) (40)
Total operating expenses13,683
 19,304
 20,698
Operating Income7,736
 4,191
 2,333
Other Income and (Expense):     
Allowance for equity funds used during construction128
 138
 160
Earnings from equity method investments162
 148
 106
Interest expense, net of amounts capitalized(1,736) (1,842) (1,694)
Other income (expense), net252
 114
 163
Total other income and (expense)(1,194) (1,442) (1,265)
Earnings Before Income Taxes6,542
 2,749
 1,068
Income taxes1,798
 449
 142
Consolidated Net Income4,744
 2,300
 926
Dividends on preferred and preference stock of subsidiaries15
 16
 38
Net income (loss) attributable to noncontrolling interests(10) 58
 46
Consolidated Net Income Attributable to Southern Company$4,739
 $2,226
 $842
Common Stock Data:     
Earnings per share —     
Basic$4.53
 $2.18
 $0.84
Diluted4.50
 2.17
 0.84
Average number of shares of common stock outstanding — (in millions)     
Basic1,046
 1,020
 1,000
Diluted1,054
 1,025
 1,008
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Consolidated Net Income$4,744
 $2,300
 $926
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(39), $(16), and $34, respectively(115) (47) 57
Reclassification adjustment for amounts included in net income,
net of tax of $19, $24, and $(37), respectively
57
 72
 (60)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(31), $(2), and $6, respectively(64) (5) 17
Reclassification adjustment for amounts included in net income,
net of tax of $1, $5, and $(6), respectively
4
 6
 (23)
Total other comprehensive income (loss)(118) 26
 (9)
Dividends on preferred and preference stock of subsidiaries15
 16
 38
Comprehensive income (loss) attributable to noncontrolling interests(10) 58
 46
Consolidated Comprehensive Income Attributable to Southern Company$4,621
 $2,252
 $833
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Consolidated net income$4,744
 $2,300
 $926
Adjustments to reconcile consolidated net income
to net cash provided from operating activities —
     
Depreciation and amortization, total3,331
 3,549
 3,457
Deferred income taxes611
 89
 166
Utilization of federal investment tax credits757
 5
 
Allowance for equity funds used during construction(128) (138) (160)
Pension, postretirement, and other employee benefits(204) (103) (84)
Pension and postretirement funding(1,136) (4) (2)
Settlement of asset retirement obligations(328) (244) (177)
Storm damage reserve accruals168
 74
 38
Stock based compensation expense107
 125
 109
Estimated loss on plants under construction15
 1,093
 3,179
Impairment charges168
 210
 
(Gain) loss on dispositions, net(2,588) (301) (42)
Other, net102
 14
 (63)
Changes in certain current assets and liabilities —     
-Receivables630
 (426) (202)
-Fossil fuel for generation(120) 123
 36
-Natural gas for sale44
 49
 36
-Other current assets70
 (127) (143)
-Accounts payable(693) 291
 (280)
-Accrued taxes117
 267
 (142)
-Accrued compensation(9) 33
 (8)
-Retail fuel cost over recovery62
 36
 (212)
-Other current liabilities61
 30
 (38)
Net cash provided from operating activities5,781
 6,945
 6,394
Investing Activities:     
Business acquisitions, net of cash acquired(50) (65) (1,054)
Property additions(7,555) (8,001) (7,423)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion               
 
 1,682
Nuclear decommissioning trust fund purchases(888) (1,117) (811)
Nuclear decommissioning trust fund sales882
 1,111
 805
Proceeds from dispositions and asset sales5,122
 2,956
 97
Cost of removal, net of salvage(393) (388) (313)
Change in construction payables, net(169) 50
 259
Investments in unconsolidated subsidiaries(148) (114) (152)
Payments pursuant to LTSAs(234) (186) (227)
Other investing activities41
 (6) (53)
Net cash used for investing activities(3,392) (5,760) (7,190)
Financing Activities:     
Increase (decrease) in notes payable, net640
 (774) (401)
Proceeds —     
Long-term debt5,220
 2,478
 5,858
Common stock844
 1,090
 793
Preferred stock
 
 250
Short-term borrowings350
 3,150
 1,259
Redemptions and repurchases —     
Long-term debt(4,347) (5,533) (2,930)
Preferred and preference stock
 (33) (658)
Short-term borrowings(1,850) (1,900) (659)
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Payment of common stock dividends(2,570) (2,425) (2,300)
Other financing activities(157) (264) (222)
Net cash provided from (used for) financing activities(1,930) (1,813) 951
Net Change in Cash, Cash Equivalents, and Restricted Cash459
 (628) 155
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year1,519
 2,147
 1,992
Cash, Cash Equivalents, and Restricted Cash at End of Year$1,978
 $1,519
 $2,147
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $74, $72, and $89 capitalized, respectively)$1,651
 $1,794
 $1,676
Income taxes (net of refunds)276
 172
 (410)
Noncash transactions — Accrued property additions at year-end932
 1,103
 985
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$1,975
 $1,396
Receivables —   
Customer accounts receivable1,614
 1,726
Energy marketing receivable428
 801
Unbilled revenues599
 654
Under recovered fuel clause revenues
 115
Other accounts and notes receivable817
 813
Accumulated provision for uncollectible accounts(49) (50)
Materials and supplies1,388
 1,465
Fossil fuel for generation521
 405
Natural gas for sale479
 524
Prepaid expenses314
 432
Assets from risk management activities, net of collateral183
 222
Regulatory assets – asset retirement obligations287
 
Other regulatory assets885
 525
Assets held for sale188
 393
Other current assets188
 162
Total current assets9,817
 9,583
Property, Plant, and Equipment:   
In service105,114
 103,706
Less: Accumulated depreciation30,765
 31,038
Plant in service, net of depreciation74,349
 72,668
Nuclear fuel, at amortized cost851
 875
Construction work in progress7,880
 7,254
Total property, plant, and equipment83,080
 80,797
Other Property and Investments:   
Goodwill5,280

5,315
Equity investments in unconsolidated subsidiaries1,303

1,580
Other intangible assets, net of amortization of $280 and $235
at December 31, 2019 and December 31, 2018, respectively
536
 613
Nuclear decommissioning trusts, at fair value2,036
 1,721
Leveraged leases788
 798
Miscellaneous property and investments391
 269
Total other property and investments10,334
 10,296
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization1,800
 
Deferred charges related to income taxes798
 794
Unamortized loss on reacquired debt300
 323
Regulatory assets – asset retirement obligations, deferred4,094
 2,933
Other regulatory assets, deferred6,805
 5,375
Assets held for sale, deferred601
 5,350
Other deferred charges and assets1,071
 1,463
Total deferred charges and other assets15,469
 16,238
Total Assets$118,700
 $116,914
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$2,989
 $3,198
Notes payable2,055
 2,915
Energy marketing trade payables442
 856
Accounts payable2,115
 2,580
Customer deposits496
 522
Accrued taxes —   
Accrued income taxes
 21
Other accrued taxes659
 635
Accrued interest474
 472
Accrued compensation992
 1,030
Asset retirement obligations504
 404
Other regulatory liabilities756
 376
Liabilities held for sale5
 425
Operating lease obligations229
 
Other current liabilities830
 852
Total current liabilities12,546
 14,286
Long-Term Debt (See accompanying statements)
41,798
 40,736
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes7,888
 6,558
Deferred credits related to income taxes6,078
 6,460
Accumulated deferred ITCs2,291
 2,372
Employee benefit obligations1,814
 2,147
Operating lease obligations, deferred1,615
 
Asset retirement obligations, deferred9,282
 8,990
Accrued environmental remediation234
 268
Other cost of removal obligations2,239
 2,297
Other regulatory liabilities, deferred256
 169
Liabilities held for sale, deferred
 2,836
Other deferred credits and liabilities609
 465
Total deferred credits and other liabilities32,306
 32,562
Total Liabilities86,650
 87,584
Redeemable Preferred Stock of Subsidiaries (See accompanying statements)
291
 291
Total Stockholders' Equity (See accompanying statements)
31,759
 29,039
Total Liabilities and Stockholders' Equity$118,700
 $116,914
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term debt payable to affiliated trusts —     
Variable rate due 20425.20%$206
$206
  
Long-term senior notes and debt —     
Maturity     
2019
2,948
  
20202.43%2,100
2,271
  
20212.70%2,672
2,638
  
20222.53%1,870
1,983
  
20233.05%2,290
2,290
  
20242.20%400

  
2025 through 20494.27%20,120
19,895
  
Variable rate due 20202.50%800
1,875
  
Variable rate due 20212.42%125
125
  
Total long-term senior notes and debt 30,377
34,025
  
Other long-term debt —     
Pollution control revenue bonds —     
Maturity     
2019
25
  
20222.35%53
90
  
2023
33
  
2025 through 20532.40%1,466
1,112
  
Variable rate due 20201.80%7
148
  
Variable rate due 20211.75%65
65
  
Variable rate due 2022
4
  
Variable rate due 20241.72%21
21
  
Variable rate due 2025 to 20521.69%1,351
1,396
  
Plant Daniel revenue bonds due 20217.13%270
270
  
FFB loans —     
Maturity     
20203.20%64
44
  
20213.20%64
44
  
20223.20%64
44
  
20233.20%64
44
  
20243.20%64
44
  
2025 to 20443.20%3,523
2,405
  
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026 to 20593.94%1,525
1,225
  
Junior subordinated notes due 20242.70%863

  
Junior subordinated notes due 2027 to 20775.00%4,433
3,570
  
Total other long-term debt 13,947
10,684
  
Unamortized fair value adjustment of long-term debt 430
474
  
Finance lease obligations 226
197
  
Unamortized debt premium (discount), net (152)(158)  
Unamortized debt issuance expense (247)(208)  
Total long-term debt44,787
45,220
  
Less:     
Amount due within one year 2,989
3,198
  
Amount held for sale 
1,286
  
Long-term debt excluding amounts due within one year and held for sale 41,798
40,736
56.6%58.1%
      
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CONSOLIDATED STATEMENTS OF CAPITALIZATION (continued)
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
    
  2019201820192018
  (in millions)(percent of total)
Redeemable Preferred Stock of Subsidiaries:     
Cumulative preferred stock     
$100 par or stated value — 4.20% to 4.92%     
Authorized — 10 million shares     
Outstanding — 475,115 shares 48
48
  
$1 par value — 5.00%     
Authorized — 28 million shares     
Outstanding — 10 million shares 243
243
  
Total redeemable preferred stock of subsidiaries
 



  
(annual dividend requirement — $15 million) 291
291
0.4
0.4
Common Stockholders' Equity:     
Common stock, par value $5 per share — 5,257
5,164
  
Authorized — 1.5 billion shares     
Issued — 2019: 1.1 billion shares     
  — 2018: 1.0 billion shares     
Treasury — 2019: 1.0 million shares     
      — 2018: 1.0 million shares     
Paid-in capital 11,734
11,094
  
Treasury, at cost (42)(38)  
Retained earnings 10,877
8,706
  
Accumulated other comprehensive loss (321)(203)  
Total common stockholders' equity 27,505
24,723
37.2
35.3
Noncontrolling interests 4,254
4,316
5.8
6.2
Total stockholders' equity 31,759
29,039
  
Total Capitalization $73,848
$70,066
100.0%100.0%

The accompanying notes are an integral part of these consolidated financial statements. 
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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 Southern Company Common Stockholders' Equity     
 Number of Common Shares Common Stock   
Accumulated
Other
Comprehensive Income
(Loss)
 
Preferred
and Preference Stock of Subsidiaries
 
Noncontrolling
Interests(a)
 
 Issued Treasury Par Value Paid-In Capital Treasury Retained Earnings   Total
 (in millions)
Balance at December 31, 2016991
 (1) $4,952
 $9,661
 $(31) $10,356
 $(180) $609
 $1,245
$26,612
Consolidated net income attributable
   to Southern Company

 
 
 
 
 842
 
 
 
842
Other comprehensive income (loss)
 
 
 
 
 
 (9) 
 
(9)
Stock issued18
 
 86
 707
 
 
 
 
 
793
Stock-based compensation
 
 
 105
 
 
 
 
 
105
Cash dividends of $2.3000 per share
 
 
 
 
 (2,300) 
 
 
(2,300)
Preferred and preference stock
   redemptions

 
 
 
 
 
 
 (609) 
(609)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 79
79
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (122)(122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 44
44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 
 
 114
114
Other
 
 
 (4) (5) (13) 
 
 1
(21)
Balance at December 31, 20171,009
 (1) 5,038
 10,469
 (36) 8,885
 (189) 
 1,361
25,528
Consolidated net income attributable
   to Southern Company

 
 
 
 
 2,226
 
 
 
2,226
Other comprehensive income
 
 
 
 
 
 26
 
 
26
Stock issued26
 
 126
 964
 
 
 
 
 
1,090
Stock-based compensation
 
 
 84
 
 
 
 
 
84
Cash dividends of $2.3800 per share
 
 
 
 
 (2,425) 
 
 
(2,425)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 1,372
1,372
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (164)(164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 58
58
Sale of noncontrolling interests
 
 
 (417) 
 
 
 
 1,690
1,273
Other
 
 
 (6) (2) 20
 (40) 
 (1)(29)
Balance at December 31, 20181,035
 (1) 5,164
 11,094
 (38) 8,706
 (203) 
 4,316
29,039
Consolidated net income attributable
   to Southern Company

 
 
 
 
 4,739
 
 
 
4,739
Other comprehensive income (loss)
 
 
 
 
 
 (118) 
 
(118)
Issuance of equity units(b)

 
 
 (198) 
 
 
 
 
(198)
Stock issued19
 
 93
 751
 
 
 
 
 
844
Stock-based compensation
 
 
 66
 
 
 
 
 
66
Cash dividends of $2.4600 per share
 
 
 
 
 (2,570) 
 
 
(2,570)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 276
276
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (327)(327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 (10)(10)
Other
 
 
 21
 (4) 2
 
 
 (1)18
Balance at December 31, 20191,054
 (1) $5,257
 $11,734
 $(42) $10,877
 $(321) $
 $4,254
$31,759
(a)
Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Southern PowerRedeemable Noncontrolling Interests" for additional information.
(b)
See Note 8 under "Equity Units" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Alabama Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Alabama Power's management. Our responsibility is to express an opinion on Alabama Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Alabama Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Alabama Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Alabama Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2020
We have served as Alabama Power's auditor since 2002.
Table of ContentsIndex to Financial Statements

STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$5,501
 $5,367
 $5,458
Wholesale revenues, non-affiliates258
 279
 276
Wholesale revenues, affiliates81
 119
 97
Other revenues285
 267
 208
Total operating revenues6,125
 6,032
 6,039
Operating Expenses:     
Fuel1,112
 1,301
 1,225
Purchased power, non-affiliates203
 216
 170
Purchased power, affiliates200
 216
 158
Other operations and maintenance1,821
 1,669
 1,709
Depreciation and amortization793
 764
 736
Taxes other than income taxes403
 389
 384
Total operating expenses4,532
 4,555
 4,382
Operating Income1,593
 1,477
 1,657
Other Income and (Expense):     
Allowance for equity funds used during construction52
 62
 39
Interest expense, net of amounts capitalized(336) (323) (305)
Other income (expense), net46
 20
 43
Total other income and (expense)(238) (241) (223)
Earnings Before Income Taxes1,355
 1,236
 1,434
Income taxes270
 291
 568
Net Income1,085
 945
 866
Dividends on Preferred and Preference Stock15
 15
 18
Net Income After Dividends on Preferred and Preference Stock$1,070
 $930
 $848
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Net Income$1,085
 $945
 $866
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $-, and $(1), respectively
 
 1
Reclassification adjustment for amounts included in net income,
net of tax of $2, $2, and $2, respectively
4
 4
 3
Total other comprehensive income (loss)4
 4
 4
Comprehensive Income$1,089
 $949
 $870
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$1,085
 $945
 $866
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total951
 917
 888
Deferred income taxes197
 174
 409
Allowance for equity funds used during construction(52) (62) (39)
Pension and postretirement funding(362) (4) (2)
Settlement of asset retirement obligations(127) (55) (26)
Natural disaster reserve accruals138
 16
 4
Other deferred charges – affiliated(42) 
 
Other, net(90) (17) 9
Changes in certain current assets and liabilities —     
-Receivables9
 (149) (168)
-Prepayments(4) (2) (2)
-Materials and supplies23
 (82) (34)
-Other current assets(85) 30
 20
-Accounts payable(41) 24
 71
-Accrued taxes49
 10
 (84)
-Accrued compensation(14) 8
 (2)
-Retail fuel cost over recovery47
 
 (76)
-Other current liabilities97
 128
 3
Net cash provided from operating activities1,779
 1,881
 1,837
Investing Activities:     
Property additions(1,757) (2,158) (1,882)
Nuclear decommissioning trust fund purchases(261) (279) (237)
Nuclear decommissioning trust fund sales260
 278
 237
Cost of removal net of salvage(103) (130) (112)
Change in construction payables(71) 26
 161
Other investing activities(31) (26) (43)
Net cash used for investing activities(1,963) (2,289) (1,876)
Financing Activities:     
Proceeds —     
Senior notes600
 500
 1,100
Preferred stock
 
 250
Pollution control revenue bonds
 120
 
Capital contributions from parent company1,240
 511
 361
Redemptions and repurchases —     
Senior notes(200) 
 (525)
Preferred and preference stock
 
 (238)
Pollution control revenue bonds
 (120) (36)
Payment of common stock dividends(844) (801) (714)
Other financing activities(31) (33) (35)
Net cash provided from financing activities765
 177
 163
Net Change in Cash, Cash Equivalents, and Restricted Cash581
 (231) 124
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year313
 544
 420
Cash, Cash Equivalents, and Restricted Cash at End of Year$894
 $313
 $544
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $19, $22, and $15 capitalized, respectively)$311
 $284
 $285
Income taxes (net of refunds)26
 106
 236
Noncash transactions — Accrued property additions at year-end200
 272
 245
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Alabama Power Company 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$894
 $313
Receivables —   
Customer accounts receivable425
 403
Unbilled revenues134
 150
Affiliated37
 94
Other accounts and notes receivable72
 51
Accumulated provision for uncollectible accounts(22) (10)
Fossil fuel stock212
 141
Materials and supplies512
 546
Prepaid expenses50
 66
Other regulatory assets242
 137
Other current assets30
 18
Total current assets2,586
 1,909
Property, Plant, and Equipment:   
In service30,023
 30,402
Less: Accumulated provision for depreciation9,540
 9,988
Plant in service, net of depreciation20,483
 20,414
Nuclear fuel, at amortized cost296
 324
Construction work in progress890
 1,113
Total property, plant, and equipment21,669
 21,851
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries66
 65
Nuclear decommissioning trusts, at fair value1,023
 847
Miscellaneous property and investments128
 127
Total other property and investments1,217
 1,039
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization132
 
Deferred charges related to income taxes244
 240
Deferred under recovered regulatory clause revenues40
 116
Regulatory assets – asset retirement obligations1,019
 147
Other regulatory assets, deferred1,976
 1,240
Other deferred charges and assets269
 188
Total deferred charges and other assets3,680
 1,931
Total Assets$29,152
 $26,730
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Alabama Power Company 2019 Annual Report
Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$251
 $201
Accounts payable —   
Affiliated316
 364
Other514
 614
Customer deposits100
 96
Accrued taxes78
 44
Accrued interest92
 89
Accrued compensation216
 227
Asset retirement obligations195
 163
Other regulatory liabilities193
 116
Other current liabilities105
 45
Total current liabilities2,060
 1,959
Long-Term Debt (See accompanying statements)
8,270
 7,923
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes3,260
 2,962
Deferred credits related to income taxes1,960
 2,027
Accumulated deferred ITCs100
 106
Employee benefit obligations206
 314
Operating lease obligations107
 
Asset retirement obligations, deferred3,345
 3,047
Other cost of removal obligations412
 497
Other regulatory liabilities, deferred146
 69
Other deferred credits and liabilities40
 58
Total deferred credits and other liabilities9,576
 9,080
Total Liabilities19,906
 18,962
Redeemable Preferred Stock (See accompanying statements)
291
 291
Common Stockholder's Equity (See accompanying statements)
8,955
 7,477
Total Liabilities and Stockholder's Equity$29,152
 $26,730
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Alabama Power Company 2019 Annual Report
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term debt payable to affiliated trusts —     
Variable rate due 20425.20%$206
$206
  
Long-term notes payable —     
Maturity     
2019
200
  
20203.38%250
250
  
20213.81%220
220
  
20223.36%750
750
  
20233.55%300
300
  
2025-20494.41%5,775
5,175
  
Variable rate due 20212.90%25
25
  
Total long-term notes payable 7,320
6,920
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20342.46%207
207
  
Variable rate due 20211.75%65
65
  
Variable rate due 20241.72%21
21
  
Variable rate due 2028-20381.65%767
767
  
Total other long-term debt 1,060
1,060
  
Finance lease obligations 4
4
  
Unamortized debt premium (discount), net (14)(12)  
Unamortized debt issuance expense (55)(54)  
Total long-term debt 8,521
8,124
  
Less amount due within one year 251
201
  
Long-term debt excluding amount due within one year 8,270
7,923
47.2%50.4%
Redeemable Preferred Stock:     
Cumulative redeemable preferred stock     
$100 par or stated value — 4.20% to 4.92%     
Authorized — 3,850,000 shares     
Outstanding — 475,115 shares 48
48
  
$1 par value — 5.00%     
Authorized — 27,500,000 shares     
Outstanding — 10,000,000 shares: $25 stated value 243
243
  
Total redeemable preferred stock
(annual dividend requirement — $15 million)
 291
291
1.7
1.9
Common Stockholder's Equity:     
Common stock, par value $40 per share —     
Authorized — 40,000,000 shares     
Outstanding — 30,537,500 shares 1,222
1,222
  
Paid-in capital 4,755
3,508
  
Retained earnings 3,001
2,775
  
Accumulated other comprehensive loss (23)(28)  
Total common stockholder's equity 8,955
7,477
51.1
47.7
Total Capitalization $17,516
$15,691
100.0%100.0%
 The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements


STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report

 
Number of
Common
Shares
Issued
 
Common
Stock
 
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Income (Loss)
 Total
 (in millions)
Balance at December 31, 201631
 $1,222
 $2,613
 $2,518
 $(30) $6,323
Net income after dividends on
preferred and preference stock

 
 
 848
 
 848
Capital contributions from parent company
 
 373
 
 
 373
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (714) 
 (714)
Other
 
 
 (5) 
 (5)
Balance at December 31, 201731
 1,222
 2,986
 2,647
 (26) 6,829
Net income after dividends on
preferred and preference stock

 
 
 930
 
 930
Capital contributions from parent company
 
 522
 
 
 522
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (801) 
 (801)
Other
 
 
 (1) (6) (7)
Balance at December 31, 201831
 1,222
 3,508
 2,775
 (28) 7,477
Net income after dividends on
preferred and preference stock

 
 
 1,070
 
 1,070
Capital contributions from parent company
 
 1,247
 
 
 1,247
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (844) 
 (844)
Other
 
 
 
 1
 1
Balance at December 31, 201931
 $1,222
 $4,755
 $3,001
 $(23) $8,955
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Georgia Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Georgia Power's management. Our responsibility is to express an opinion on Georgia Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Georgia Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Georgia Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Georgia Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Georgia Power's auditor since 2002.
Table of ContentsIndex to Financial Statements

STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$7,707
 $7,752
 $7,738
Wholesale revenues, non-affiliates129
 163
 163
Wholesale revenues, affiliates11
 24
 26
Other revenues561
 481
 383
Total operating revenues8,408
 8,420
 8,310
Operating Expenses:     
Fuel1,444
 1,698
 1,671
Purchased power, non-affiliates521
 430
 416
Purchased power, affiliates575
 723
 622
Other operations and maintenance1,972
 1,860
 1,724
Depreciation and amortization981
 923
 895
Taxes other than income taxes454
 437
 409
Estimated loss on Plant Vogtle Units 3 and 4
 1,060
 
Total operating expenses5,947
 7,131
 5,737
Operating Income2,461
 1,289
 2,573
Other Income and (Expense):     
Interest expense, net of amounts capitalized(409) (397) (419)
Other income (expense), net140
 115
 104
Total other income and (expense)(269) (282) (315)
Earnings Before Income Taxes2,192
 1,007
 2,258
Income taxes472
 214
 830
Net Income1,720
 793
 1,428
Dividends on Preferred and Preference Stock
 
 14
Net Income After Dividends on Preferred and Preference Stock$1,720
 $793
 $1,414
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$1,720
 $793
 $1,428
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(15), $-, and $-, respectively(44) 
 
Reclassification adjustment for amounts included in net income,
net of tax of $1, $1, and $1, respectively
2
 3
 3
Total other comprehensive income (loss)(42) 3
 3
Comprehensive Income$1,678
 $796
 $1,431
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$1,720
 $793
 $1,428
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total1,193
 1,142
 1,100
Deferred income taxes179
 (260) 458
Pension, postretirement, and other employee benefits(146) (75) (68)
Pension and postretirement funding(200) 
 
Settlement of asset retirement obligations(151) (116) (120)
Retail fuel cost over recovery – long-term73
 
 
Other deferred charges – affiliated(108) 
 
Estimated loss on Plant Vogtle Units 3 and 4
 1,060
 
Other, net12
 (21) (83)
Changes in certain current assets and liabilities —     
-Receivables177
 8
 (256)
-Fossil fuel stock(41) 83
 (16)
-Prepaid income taxes102
 152
 (168)
-Other current assets(19) (43) (28)
-Accounts payable(92) 95
 (219)
-Accrued taxes58
 58
 1
-Retail fuel cost over recovery
 
 (84)
-Other current liabilities150
 (107) (33)
Net cash provided from operating activities2,907
 2,769
 1,912
Investing Activities:     
Property additions(3,510) (3,116) (2,704)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion            
 
 1,682
Nuclear decommissioning trust fund purchases(628) (839) (574)
Nuclear decommissioning trust fund sales622
 833
 568
Cost of removal, net of salvage(186) (107) (100)
Change in construction payables, net of joint owner portion(122) 68
 223
Payments pursuant to LTSAs(81) (54) (64)
Proceeds from dispositions and asset sales14
 138
 96
Other investing activities6
 (32) (39)
Net cash used for investing activities(3,885) (3,109) (912)
Financing Activities:     
Increase (decrease) in notes payable, net(179) 294
 (391)
Proceeds —     
FFB loan1,218
 
 
Senior notes750
 
 1,350
Pollution control revenue bonds issuances and remarketings584
 108
 65
Capital contributions from parent company634
 2,985
 431
Short-term borrowings250
 
 700
Other long-term debt
 
 370
Redemptions and repurchases —     
Senior notes(500) (1,500) (450)
Pollution control revenue bonds(223) (469) (65)
Short-term borrowings
 (150) (550)
Preferred and preference stock
 
 (270)
Other long-term debt
 (100) 
Payment of common stock dividends(1,576) (1,396) (1,281)
Premiums on redemption and repurchases of senior notes
 (152) 
Other financing activities(40) (20) (60)
Net cash provided from (used for) financing activities918
 (400) (151)
Net Change in Cash, Cash Equivalents, and Restricted Cash(60) (740) 849
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year112
 852
 3
Cash, Cash Equivalents, and Restricted Cash at End of Year$52
 $112
 $852
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $35, $26, and $23 capitalized, respectively)$373
 $408
 $386
Income taxes (net of refunds)110
 300
 496
Noncash transactions — Accrued property additions at year-end560
 683
 550
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$52
 $4
Restricted cash and cash equivalents
 108
Receivables —   
Customer accounts receivable533
 591
Unbilled revenues203
 208
Under recovered fuel clause revenues
 115
Joint owner accounts receivable136
 170
Affiliated21
 39
Other accounts and notes receivable209
 80
Accumulated provision for uncollectible accounts(2) (2)
Fossil fuel stock272
 231
Materials and supplies501
 519
Prepaid expenses63
 142
Regulatory assets – storm damage reserves213
 30
Regulatory assets – asset retirement obligations254
 
Other regulatory assets263
 169
Other current assets77
 70
Total current assets2,795
 2,474
Property, Plant, and Equipment:   
In service38,137
 37,675
Less: Accumulated provision for depreciation11,753
 12,096
Plant in service, net of depreciation26,384
 25,579
Nuclear fuel, at amortized cost555
 550
Construction work in progress5,650
 4,833
Total property, plant, and equipment32,589
 30,962
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries52
 51
Nuclear decommissioning trusts, at fair value1,013
 873
Miscellaneous property and investments64
 72
Total other property and investments1,129
 996
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization1,428
 
Deferred charges related to income taxes519
 517
Regulatory assets – asset retirement obligations, deferred2,865
 2,644
Other regulatory assets, deferred2,716
 2,258
Other deferred charges and assets500
 514
Total deferred charges and other assets8,028
 5,933
Total Assets$44,541
 $40,365
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$1,025
 $617
Notes payable365
 294
Accounts payable —   
Affiliated512
 575
Other711
 890
Customer deposits283
 276
Accrued taxes407
 377
Accrued interest118
 105
Accrued compensation233
 221
Operating lease obligations144
 
Asset retirement obligations265
��202
Other regulatory liabilities447
 169
Other current liabilities187
 183
Total current liabilities4,697
 3,909
Long-Term Debt (See accompanying statements)
10,791
 9,364
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes3,257
 3,062
Deferred credits related to income taxes2,862
 3,080
Accumulated deferred ITCs255
 262
Employee benefit obligations540
 599
Operating lease obligations, deferred1,282
 
Asset retirement obligations, deferred5,519
 5,627
Other deferred credits and liabilities273
 139
Total deferred credits and other liabilities13,988
 12,769
Total Liabilities29,476
 26,042
Common Stockholder's Equity (See accompanying statements)
15,065
 14,323
Total Liabilities and Stockholder's Equity$44,541
 $40,365
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$498
  
20202.00%950
950
  
20212.40%325
325
  
20222.85%400
400
  
20235.75%100
100
  
20242.20%400

  
2026-20434.21%3,675
3,325
  
Total long-term notes payable 5,850
5,598
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20222.35%53
53
  
Due 2025-20532.37%1,217
748
  
Variable rate due 2019
108
  
Variable rate due 2026-20521.74%551
551
  
FFB loans —     
Maturity     
20203.20%64
44
  
20213.20%64
44
  
20223.20%64
44
  
20233.20%64
44
  
20243.20%64
44
  
2025-20443.20%3,523
2,405
  
Junior subordinated notes due 20775.00%270
270
  
Total other long-term debt 5,934
4,355
  
Finance lease obligations 156
142
  
Unamortized debt premium (discount), net (7)(6)  
Unamortized debt issuance expense (117)(108)  
Total long-term debt 11,816
9,981
  
Less amount due within one year 1,025
617
  
Long-term debt excluding amount due within one year 10,791
9,364
41.7%39.5%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 20,000,000 shares     
Outstanding — 9,261,500 shares 398
398
  
Paid-in capital 10,962
10,322
  
Retained earnings 3,756
3,612
  
Accumulated other comprehensive loss (51)(9)  
Total common stockholder's equity 15,065
14,323
58.3
60.5
Total Capitalization $25,856
$23,687
100.0%100.0%
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20169
 $398
 $6,885
 $4,086
 $(13) $11,356
Net income after dividends on
preferred and preference stock

 
 
 1,414
 
 1,414
Capital contributions from parent company
 
 443
 
 
 443
Other comprehensive income
 
 
 
 3
 3
Cash dividends on common stock
 
 
 (1,281) 
 (1,281)
Other
 
 
 (4) 
 (4)
Balance at December 31, 20179
 398
 7,328
 4,215
 (10) 11,931
Net income after dividends on
preferred and preference stock

 
 
 793
 
 793
Capital contributions from parent company
 
 2,994
 
 
 2,994
Other comprehensive income
 
 
 
 3
 3
Cash dividends on common stock
 
 
 (1,396) 
 (1,396)
Other
 
 
 
 (2) (2)
Balance at December 31, 20189
 398
 10,322
 3,612
 (9) 14,323
Net income after dividends on
preferred and preference stock

 
 
 1,720
 
 1,720
Capital contributions from parent company
 
 640
 
 
 640
Other comprehensive income (loss)
 
 
 
 (42) (42)
Cash dividends on common stock
 
 
 (1,576) 
 (1,576)
Balance at December 31, 20199
 $398
 $10,962
 $3,756
 $(51) $15,065
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related statements of operations, comprehensive income (loss), common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Mississippi Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Mississippi Power's management. Our responsibility is to express an opinion on Mississippi Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Mississippi Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Mississippi Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Mississippi Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Mississippi Power's auditor since 2002.

Table of ContentsIndex to Financial Statements

STATEMENTS OF OPERATIONS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$877
 $889
 $854
Wholesale revenues, non-affiliates237
 263
 259
Wholesale revenues, affiliates132
 91
 56
Other revenues18
 22
 18
Total operating revenues1,264
 1,265
 1,187
Operating Expenses:     
Fuel407
 405
 395
Purchased power20
 41
 25
Other operations and maintenance283
 313
 291
Depreciation and amortization192
 169
 161
Taxes other than income taxes113
 107
 104
Estimated loss on Kemper IGCC24
 37
 3,362
Total operating expenses1,039
 1,072
 4,338
Operating Income (Loss)225
 193
 (3,151)
Other Income and (Expense):     
Allowance for equity funds used during construction1
 
 72
Interest expense, net of amounts capitalized(69) (76) (42)
Other income (expense), net12
 17
 1
Total other income and (expense)(56) (59) 31
Earnings (Loss) Before Income Taxes169
 134
 (3,120)
Income taxes (benefit)30
 (102) (532)
Net Income (Loss)139
 236
 (2,588)
Dividends on Preferred Stock
 1
 2
Net Income (Loss) After Dividends on Preferred Stock$139
 $235
 $(2,590)
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Net Income (Loss)$139
 $236
 $(2,588)
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $(1), and $(1), respectively
 (1) (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $1, respectively
1
 1
 1
Total other comprehensive income (loss)1
 
 
Comprehensive Income (Loss)$140
 $236
 $(2,588)
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income (loss)$139
 $236
 $(2,588)
Adjustments to reconcile net income (loss)
to net cash provided from operating activities —
     
Depreciation and amortization, total197
 177
 198
Deferred income taxes37
 475
 (727)
Allowance for equity funds used during construction(1) 
 (72)
Pension and postretirement funding(54) 
 
Settlement of asset retirement obligations(35) (35) (23)
Estimated loss on Kemper IGCC15
 33
 3,179
Other, net21
 18
 (8)
Changes in certain current assets and liabilities —     
-Receivables6
 (19) 540
-Fossil fuel stock(6) (3) 24
-Prepaid income taxes12
 (12) 
-Other current assets(2) (7) (13)
-Accounts payable3
 15
 (3)
-Accrued interest
 (1) (29)
-Accrued taxes11
 (46) 80
-Over recovered regulatory clause revenues16
 14
 (51)
-Other current liabilities(20) (41) (4)
Net cash provided from operating activities339
 804
 503
Investing Activities:     
Property additions(202) (188) (429)
Construction payables(1) 4
 (47)
Payments pursuant to LTSAs(23) (29) (10)
Other investing activities(37) (19) (18)
Net cash used for investing activities(263) (232) (504)
Financing Activities:     
Decrease in notes payable, net
 (4) (18)
Proceeds —     
Capital contributions from parent company51
 15
 1,002
Senior notes
 600
 
Long-term debt issuance to parent company
 
 40
Short-term borrowings
 300
 109
Pollution control revenue bonds43
 
 
Redemptions —     
Preferred stock
 (33) 
Pollution control revenue bonds
 (43) 
Short-term borrowings
 (300) (109)
Long-term debt to parent company
 
 (591)
Capital leases
 
 (71)
Senior notes(25) (155) (35)
Other long-term debt
 (900) (300)
Return of capital to parent company(150) 
 
Other financing activities(2) (7) (2)
Net cash provided from (used for) financing activities(83) (527) 25
Net Change in Cash, Cash Equivalents, and Restricted Cash(7) 45
 24
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year293
 248
 224
Cash, Cash Equivalents, and Restricted Cash at End of Year$286
 $293
 $248
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $(1), $-, and $29 capitalized, respectively)$71
 $80
 $65
Income taxes (net of refunds)(27) (525) (424)
Noncash transactions — Accrued property additions at year-end35
 35
 32
The accompanying notes are an integral part of these financial statements. 
Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$286
 $293
Receivables —   
Customer accounts receivable35
 34
Unbilled revenues39
 41
Affiliated27
 21
Other accounts and notes receivable26
 31
Fossil fuel stock26
 20
Materials and supplies61
 53
Other regulatory assets99
 116
Prepaid income taxes
 12
Other current assets10
 7
Total current assets609
 628
Property, Plant, and Equipment:   
In service4,857
 4,900
Less: Accumulated provision for depreciation1,463
 1,429
Plant in service, net of depreciation3,394
 3,471
Construction work in progress126
 103
Total property, plant, and equipment3,520
 3,574
Other Property and Investments131
 24
Deferred Charges and Other Assets:   
Deferred charges related to income taxes32
 33
Regulatory assets – asset retirement obligations210
 143
Other regulatory assets, deferred360
 331
Accumulated deferred income taxes139
 150
Other deferred charges and assets34
 3
Total deferred charges and other assets775
 660
Total Assets$5,035
 $4,886
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$281
 $40
Accounts payable —   
Affiliated76
 60
Other75
 90
Accrued taxes105
 95
Accrued interest15
 15
Accrued compensation35
 38
Accrued plant closure costs15
 29
Asset retirement obligations33
 34
Other regulatory liabilities21
 12
Over recovered regulatory clause liabilities29
 14
Other current liabilities49
 28
Total current liabilities734
 455
Long-Term Debt (See accompanying statements)
1,308
 1,539
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes424
 378
Deferred credits related to income taxes352
 382
Employee benefit obligations99
 115
Asset retirement obligations, deferred157
 126
Other cost of removal obligations189
 185
Other regulatory liabilities, deferred76
 81
Other deferred credits and liabilities44
 16
Total deferred credits and other liabilities1,341
 1,283
Total Liabilities3,383
 3,277
Common Stockholder's Equity (See accompanying statements)
1,652
 1,609
Total Liabilities and Stockholder's Equity$5,035
 $4,886
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Due 2028-20424.16%$950
$950
  
Adjustable rate due 20202.59%275
300
  
Total long-term notes payable 1,225
1,250
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20283.20%43

  
Variable rate due 20201.80%7
40
  
Variable rate due 2025-20281.80%33

  
Plant Daniel revenue bonds due 20217.13%270
270
  
Total other long-term debt 353
310
  
Unamortized debt premium (discount), net 19
27
  
Unamortized debt issuance expense (8)(8)  
Total long-term debt 1,589
1,579
  
Less amount due within one year 281
40
  
Long-term debt excluding amount due within one year 1,308
1,539
44.2%48.9%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 1,130,000 shares 

  
Outstanding — 1,121,000 shares 38
38
  
Paid-in capital 4,449
4,546
  
Accumulated deficit (2,832)(2,971)  
Accumulated other comprehensive loss (3)(4)  
Total common stockholder's equity 1,652
1,609
55.8
51.1
Total Capitalization $2,960
$3,148
100.0%100.0%
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 Number of Common Shares Issued 
Common
Stock
 Paid-In Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20161
 $38
 $3,525
 $(616) $(4) $2,943
Net loss after dividends on preferred stock
 
 
 (2,590) 
 (2,590)
Capital contributions from parent company
 
 1,004
 
 
 1,004
Other
 
 
 1
 
 1
Balance at December 31, 20171
 38
 4,529
 (3,205) (4) 1,358
Net income after dividends on preferred stock
 
 
 235
 
 235
Capital contributions from parent company
 
 17
 
 
 17
Other
 
 
 (1) 
 (1)
Balance at December 31, 20181
 38
 4,546
 (2,971) (4) 1,609
Net income after dividends on preferred stock
 
 
 139
 
 139
Return of capital to parent company
 
 (150) 
 
 (150)
Capital contributions from parent company
 
 53
 
 
 53
Other comprehensive income
 
 
 
 1
 1
Balance at December 31, 20191
 $38
 $4,449
 $(2,832) $(3) $1,652
The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Southern Power's management. Our responsibility is to express an opinion on Southern Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Power's auditor since 2002.
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Wholesale revenues, non-affiliates$1,528
 $1,757
 $1,671
Wholesale revenues, affiliates398
 435
 392
Other revenues12
 13
 12
Total operating revenues1,938
 2,205
 2,075
Operating Expenses:     
Fuel577
 699
 621
Purchased power108
 176
 149
Other operations and maintenance359
 395
 386
Depreciation and amortization479
 493
 503
Taxes other than income taxes40
 46
 48
Asset impairment3
 156
 
Gain on dispositions, net(23) (2) 
Total operating expenses1,543
 1,963
 1,707
Operating Income395
 242
 368
Other Income and (Expense):     
Interest expense, net of amounts capitalized(169) (183) (191)
Other income (expense), net47
 23
 1
Total other income and (expense)(122) (160) (190)
Earnings Before Income Taxes273
 82
 178
Income taxes (benefit)(56) (164) (939)
Net Income329
 246
 1,117
Net income (loss) attributable to noncontrolling interests(10) 59
 46
Net Income Attributable to Southern Power$339
 $187
 $1,071
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$329
 $246
 $1,117
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(22), $(17), and $39, respectively(66) (51) 63
Reclassification adjustment for amounts included in net income,
net of tax of $14, $19, and $(46), respectively
41
 58
 (73)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(6), $2, and $-, respectively(17) 5
 
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $-, respectively

 2
 
Total other comprehensive income (loss)(42) 14
 (10)
Comprehensive income (loss) attributable to noncontrolling interests(10) 59
 46
Comprehensive Income Attributable to Southern Power$297
 $201
 $1,061
The accompanying notes are an integral part of these consolidated financial statements.

Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$329
 $246
 $1,117
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total505
 524
 536
Deferred income taxes(74) (244) (263)
Utilization of federal investment tax credits734
 5
 
Amortization of investment tax credits(151) (58) (57)
Accrued income taxes, non-current
 (14) 14
Income taxes receivable, non-current25
 42
 (61)
Pension and postretirement funding(24) 
 
Asset impairment3
 156
 
Other, net(33) 7
 (13)
Changes in certain current assets and liabilities —     
-Receivables72
 (20) (60)
-Prepaid income taxes39
 25
 24
-Other current assets(8) (26) (28)
-Accrued taxes6
 7
 (55)
-Other current liabilities(38) (19) 1
Net cash provided from operating activities1,385
 631
 1,155
Investing Activities:     
Business acquisitions. net of cash acquired(50) (65) (1,016)
Property additions(489) (315) (268)
Change in construction payables7
 (6) (153)
Investment in unconsolidated subsidiaries(116) 
 
Proceeds from dispositions and asset sales572
 203
 
Payments pursuant to LTSAs and for equipment not yet received(104) (75) (203)
Other investing activities13
 31
 15
Net cash used for investing activities(167) (227) (1,625)
Financing Activities:     
Increase (decrease) in notes payable, net449
 (105) (104)
Proceeds —     
Short-term borrowings100
 200
 
Capital contributions from parent company64
 2
 
Senior notes
 
 525
Other long-term debt
 
 43
Redemptions —     
Senior notes(600) (350) (500)
Other long-term debt
 (420) (18)
Short-term borrowings(100) (100) 
Return of capital to parent company(755) (1,650) 
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Purchase of membership interests from noncontrolling interests
 
 (59)
Payment of common stock dividends(206) (312) (317)
Other financing activities(12) (26) (33)
Net cash used for financing activities(1,120) (363) (502)
Net Change in Cash, Cash Equivalents, and Restricted Cash98
 41
 (972)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year181
 140
 1,112
Cash, Cash Equivalents, and Restricted Cash at End of Year$279
 $181
 $140
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $15, $17, and $11 capitalized, respectively)$167
 $173
 $189
Income taxes (net of refunds and investment tax credits)(664) 79
 (487)
Noncash transactions — Accrued property additions at year-end57
 31
 32
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$279
 $181
Receivables —   
Customer accounts receivable107
 111
Affiliated30
 55
Other73
 116
Materials and supplies191
 220
Prepaid income taxes36
 25
Other current assets43
 37
Total current assets759
 745
Property, Plant, and Equipment:   
In service13,270
 13,271
Less: Accumulated provision for depreciation2,464
 2,171
Plant in service, net of depreciation10,806
 11,100
Construction work in progress515
 430
Total property, plant, and equipment11,321
 11,530
Other Property and Investments:   
Intangible assets, net of amortization of $69 and $61
at December 31, 2019 and December 31, 2018, respectively
322
 345
Equity investments in unconsolidated subsidiaries28
 
Total other property and investments350
 345
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization369
 
Prepaid LTSAs128
 98
Accumulated deferred income taxes551
 1,186
Income taxes receivable, non-current5
 30
Assets held for sale601
 576
Other deferred charges and assets216
 373
Total deferred charges and other assets1,870
 2,263
Total Assets$14,300
 $14,883
The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$824
 $599
Notes payable549
 100
Accounts payable —   
Affiliated56
 92
Other85
 77
Accrued taxes26
 6
Accrued interest32
 36
Other current liabilities132
 121
Total current liabilities1,704
 1,031
Long-Term Debt:   
Senior notes —   
2.375% due 2020
 300
2.50% due 2021300
 300
1.00% due 2022674
 687
2.75% due 2023290
 290
Weighted average interest rate 4.12% at 12/31/19 due 2025-20462,337
 2,348
Other long-term debt —   
Variable rate (3.34% at 12/31/18) due 2020
 525
Unamortized debt premium (discount), net(8) (9)
Unamortized debt issuance expense(19) (23)
Total long-term debt3,574
 4,418
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes115
 105
Accumulated deferred ITCs1,731
 1,832
Operating lease obligations376
 
Other deferred credits and liabilities178
 213
Total deferred credits and other liabilities2,400
 2,150
Total Liabilities7,678
 7,599
Common Stockholder's Equity:   
Common stock, par value $0.01 per share —   
Authorized — 1,000,000 shares   
Outstanding — 1,000 shares
 
Paid-in capital909
 1,600
Retained earnings1,485
 1,352
Accumulated other comprehensive income (loss)(26) 16
Total common stockholder's equity2,368
 2,968
Noncontrolling Interests4,254
 4,316
Total Stockholders' Equity6,622
 7,284
Total Liabilities and Stockholders' Equity$14,300
 $14,883
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings
 Accumulated Other Comprehensive Income Total Common Stockholder's Equity 
Noncontrolling Interests(a)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $3,671
 $724
 $35
 $4,430
 $1,245
 $5,675
Net income attributable
   to Southern Power

 
 
 1,071
 
 1,071
 
 1,071
Capital contributions to
   parent company, net

 
 (2) 
 
 (2) 
 (2)
Other comprehensive income (loss)
 
 
 
 (10) (10) 
 (10)
Cash dividends on common
   stock

 
 
 (317) 
 (317) 
 (317)
Other comprehensive income
transfer from SCS
(b)

 
 
 
 (27) (27) 
 (27)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 79
 79
Distributions to noncontrolling
   interests

 
 
 
 
 
 (122) (122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 44
 44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 114
 114
Other
 
 (7) 
 
 (7) 
 (7)
Balance at December 31, 2017
 
 3,662
 1,478
 (2) 5,138
 1,360
 6,498
Net income attributable
   to Southern Power

 
 
 187
 
 187
 
 187
Return of capital to parent
   company

 
 (1,650) 
 
 (1,650) 
 (1,650)
Capital contributions from parent
   company

 
 2
 
 
 2
 
 2
Other comprehensive income
 
 
 
 14
 14
 
 14
Cash dividends on common
   stock

 
 
 (312) 
 (312) 
 (312)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 1,372
 1,372
Distributions to noncontrolling
   interests

 
 
 
 
 
 (164) (164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 59
 59
Sale of noncontrolling interests(c)

 
 (417) 
 
 (417) 1,690
 1,273
Other
 
 3
 (1) 4
 6
 (1) 5
Balance at December 31, 2018
 
 1,600
 1,352
 16
 2,968
 4,316
 7,284
Net income attributable
   to Southern Power

 
 
 339
 
 339
 
 339
Return of capital to parent
   company

 
 (755) 
 
 (755) 
 (755)
Capital contributions from parent
   company

 
 64
 
 
 64
 
 64
Other comprehensive income (loss)
 
 
 
 (42) (42) 
 (42)
Cash dividends on common
   stock

 
 
 (206) 
 (206) 
 (206)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 276
 276
Distributions to noncontrolling
   interests

 
 
 
 
 
 (327) (327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 (10) (10)
Other
 
 
 
 
 
 (1) (1)
Balance at December 31, 2019
 $
 $909
 $1,485
 $(26) $2,368
 $4,254
 $6,622
(a)Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Noncontrolling Interests" for additional information.
(b)In connection with Southern Power becoming a participant to the Southern Company qualified pension plan and other postretirement benefit plan, $27 million of other comprehensive income, net of tax of $9 million, was transferred from SCS.
(c)
See Note 15 under "Southern Power - Sales of Renewable Facility Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Company Gas as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
We did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment which is accounted for by the use of the equity method. The accompanying consolidated financial statements of Southern Company Gas include its equity investment in SNG of $1,137 million and $1,261 million as of December 31, 2019 and December 31, 2018, respectively, and its earnings from its equity method investment in SNG of $141 million, $131 million, and $88 million for the years ended December 31, 2019, 2018, and 2017, respectively. Those statements were audited by other auditors whose reports (which express unqualified opinions on SNG's financial statements and contain an emphasis of matter paragraph calling attention to SNG's significant transactions with related parties) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the reports of the other auditors.
Basis for Opinion
These financial statements are the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion on Southern Company Gas' financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company Gas in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Company Gas is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Company Gas' internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the reports of the other auditors provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company Gas' auditor since 2016.
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CONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Operating Revenues:      
Natural gas revenues (includes revenue taxes of $117, $114, and $100
for the periods presented, respectively)
 $3,793
 $3,874
 $3,787
Alternative revenue programs (1) (20) 4
Other revenues 
 55
 129
Total operating revenues 3,792
 3,909
 3,920
Operating Expenses:      
Cost of natural gas 1,319
 1,539
 1,601
Cost of other sales 
 12
 29
Other operations and maintenance 888
 981
 945
Depreciation and amortization 487
 500
 501
Taxes other than income taxes 213
 211
 184
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Total operating expenses 3,022
 2,994
 3,260
Operating Income 770
 915
 660
Other Income and (Expense):      
Earnings from equity method investments 157
 148
 106
Interest expense, net of amounts capitalized (232) (228) (200)
Other income (expense), net 20
 1
 44
Total other income and (expense) (55) (79) (50)
Earnings Before Income Taxes 715
 836
 610
Income taxes 130
 464
 367
Net Income $585
 $372
 $243
The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Net Income $585
 $372
 $243
Other comprehensive income (loss):      
Qualifying hedges:      
Changes in fair value, net of tax of $(2), $2, and $(3), respectively (5) 5
 (5)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $(1), and $-, respectively
 2
 (1) 1
Pension and other postretirement benefit plans:      
Benefit plan net gain (loss), net of tax of $(14), $-, and $-, respectively (16) 
 (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $3, and $-, respectively
 
 (2) 
Total other comprehensive income (loss) (19) 2
 (5)
Comprehensive Income $566
 $374
 $238
The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CASH FLOWS
Southern Company Gas and Subsidiary Companies 2019 Annual Report
  2019 2018 2017
  (in millions)
Operating Activities:      
Net income $585
 $372
 $243
Adjustments to reconcile net income to net cash
provided from operating activities —
      
Depreciation and amortization, total 487
 500
 501
Deferred income taxes 213
 (1) 236
Pension and postretirement funding (145) 
 
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Mark-to-market adjustments (56) (19) (24)
Other, net (55) (24) (51)
Changes in certain current assets and liabilities —      
-Receivables 467
 (218) (94)
-Natural gas for sale 44
 49
 36
-Prepaid income taxes 40
 (42) (39)
-Other current assets 31
 4
 (24)
-Accounts payable (520) 372
 (20)
-Accrued taxes (69) 10
 110
-Accrued compensation 1
 32
 15
-Other current liabilities (71) (22) (8)
Net cash provided from operating activities 1,067
 764
 881
Investing Activities:      
Property additions (1,408) (1,388) (1,514)
Cost of removal, net of salvage (82) (96) (66)
Change in construction payables, net 24
 (37) 72
Investments in unconsolidated subsidiaries (31) (110) (145)
Returned investment in unconsolidated subsidiaries 67
 20
 80
Proceeds from dispositions and asset sales 32
 2,609
 
Other investing activities 12
 
 5
Net cash provided from (used for) investing activities (1,386) 998
 (1,568)
Financing Activities:      
Increase (decrease) in notes payable, net 
 (868) 262
Proceeds —      
First mortgage bonds 300
 300
 400
Capital contributions from parent company 821
 24
 103
Senior notes 
 
 450
Redemptions and repurchases —      
Gas facility revenue bonds 
 (200) 
Medium-term notes 
 
 (22)
First mortgage bonds (50) 
 
Senior notes (300) (155) 
Return of capital to parent company 
 (400) 
Payment of common stock dividends (471) (468) (443)
Other financing activities (2) (3) (9)
Net cash provided from (used for) financing activities 298
 (1,770) 741
Net Change in Cash, Cash Equivalents, and Restricted Cash (21) (8) 54
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year 70
 78
 24
Cash, Cash Equivalents, and Restricted Cash at End of Year $49
 $70
 $78
Supplemental Cash Flow Information:      
Cash paid (received) during the period for —      
Interest (net of $6, $7, and $11 capitalized, respectively) $251
 $249
 $223
Income taxes (net of refunds) (41) 524
 72
Noncash transactions — Accrued property additions at year-end 122
 97
 135
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Assets 2019 2018
  (in millions)
Current Assets:    
Cash and cash equivalents $46
 $64
Receivables —    
Energy marketing receivable 428
 801
Customer accounts receivable 323
 370
Unbilled revenues 183
 213
Affiliated 5
 11
Other accounts and notes receivable 114
 142
Accumulated provision for uncollectible accounts (18) (30)
Natural gas for sale 479
 524
Prepaid expenses 65
 118
Assets from risk management activities, net of collateral 177
 219
Other regulatory assets 92
 73
Assets held for sale 171
 
Other current assets 41
 50
Total current assets 2,106
 2,555
Property, Plant, and Equipment:    
In service 16,344
 15,177
Less: Accumulated depreciation 4,650
 4,400
Plant in service, net of depreciation 11,694
 10,777
Construction work in progress 613
 580
Total property, plant, and equipment 12,307
 11,357
Other Property and Investments:    
Goodwill 5,015
 5,015
Equity investments in unconsolidated subsidiaries 1,251
 1,538
Other intangible assets, net of amortization of $176 and $145
at December 31, 2019 and December 31, 2018, respectively
 70
 101
Miscellaneous property and investments 20
 20
Total other property and investments 6,356
 6,674
Deferred Charges and Other Assets:    
Operating lease right-of-use assets, net of amortization 93
 
Other regulatory assets, deferred 618
 669
Other deferred charges and assets 207
 193
Total deferred charges and other assets 918
 862
Total Assets $21,687
 $21,448
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholder's Equity 2019 2018
  (in millions)
Current Liabilities:    
Securities due within one year $
 $357
Notes payable 650
 650
Energy marketing trade payables 442
 856
Accounts payable —    
Affiliated 41
 45
Other 315
 402
Customer deposits 96
 133
Accrued taxes —    
Accrued income taxes 
 66
Other accrued taxes 71
 75
Accrued interest 52
 55
Accrued compensation 100
 100
Liabilities from risk management activities, net of collateral 21
 76
Other regulatory liabilities 94
 79
Other current liabilities 128
 130
Total current liabilities 2,010
 3,024
Long-term Debt (See accompanying statements)
 5,845
 5,583
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 1,219
 1,016
Deferred credits related to income taxes 874
 940
Employee benefit obligations 265
 357
Operating lease obligations 78
 
Other cost of removal obligations 1,606
 1,585
Accrued environmental remediation 233
 268
Other deferred credits and liabilities 51
 105
Total deferred credits and other liabilities 4,326
 4,271
Total Liabilities 12,181
 12,878
Common Stockholder's Equity (See accompanying statements)
 9,506
 8,570
Total Liabilities and Stockholder's Equity $21,687
 $21,448
Commitments and Contingent Matters (See notes)
 

 

The accompanying notes are an integral part of these consolidated financial statements.

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CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$300
  
20214.01%330
330
  
20228.63%46
46
  
20232.45%350
350
  
2025-20474.68%3,134
3,134
  
Total long-term notes payable 3,860
4,160
  
Other long-term debt —     
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026-20593.94%1,525
1,225
  
Total other long-term debt 1,575
1,325
  
Unamortized fair value adjustment of long-term debt 430
474
  
Unamortized debt discount (20)(19)  
Total long-term debt 5,845
5,940
  
Less amount due within one year 
357
  
Long-term debt excluding amount due within one year 5,845
5,583
38.1%39.4%
Common Stockholder's Equity:     
Common stock — par value $0.01 per share     
Authorized — 100 million shares     
Outstanding — 100 shares     
Paid-in capital 9,697
8,856
  
Accumulated deficit (198)(312)  
Accumulated other comprehensive income 7
26
  
Total common stockholder's equity 9,506
8,570
61.9
60.6
Total Capitalization $15,351
$14,153
100.0%100.0%

The accompanying notes are an integral part of these financial statements.
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CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Number of Common Shares
Issued
 Common Stock Paid-In Capital Retained Earnings (Accumulated Deficit) 
Accumulated
Other
Comprehensive Income (Loss)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $9,095
 $(12) $26
 $9,109
Net income
 
 
 243
 
 243
Capital contributions from parent company
 
 117
 
 
 117
Other comprehensive income (loss)
 
 
 
 (5) (5)
Cash dividends on common stock
 
 
 (443) 
 (443)
Other
 
 2
 
 (1) 1
Balance at December 31, 2017
 
 9,214
 (212) 20
 9,022
Net income
 
 
 372
 
 372
Return of capital to parent company
 
 (400) 
 
 (400)
Capital contributions from parent company
 
 42
 
 
 42
Other comprehensive income
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (468) 
 (468)
Other
 
 
 (4) 4
 
Balance at December 31, 2018
 
 8,856
 (312) 26
 8,570
Net income
 
 
 585
 
 585
Capital contributions from parent company
 
 841
 
 
 841
Other comprehensive income (loss)
 
 
 
 (19) (19)
Cash dividends on common stock
 
 
 (471) 
 (471)
Balance at December 31, 2019
 $
 $9,697
 $(198) $7
 $9,506

The accompanying notes are an integral part of these consolidated financial statements. 
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COMBINED NOTES TO FINANCIAL STATEMENTS
Southern Company and Subsidiary Companies 2019 Annual Report




Notes to the Financial Statements
for
The Southern Company and Subsidiary Companies
Alabama Power Company
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and Southern Company Gas conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in their financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia (which represent substantially all of Southern Company Gas' accrued remediation costs) have all received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. The traditional electric operating companies and Southern Company Gas may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental Remediation" for additional information.
Global Climate Issues
On July 8, 2019, the EPA published the final Affordable Clean Energy rule (ACE Rule) to repeal and replace the CPP. The ACE Rule requires states to develop unit-specific CO2 emission rate standards for existing coal-fired units based on heat-rate efficiency improvements. The ACE Rule is being challenged in the D.C. Circuit Court of Appeals and Georgia Power is an intervenor in the litigation in support of the rule, as are other industry parties. The ultimate impact of the ACE Rule to the Southern Company system will depend on state implementation plan requirements and the outcome of associated legal challenges and cannot be determined at this time.
Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy; however, associated impacts are currently unknown. The Southern Company system has transitioned from an electric generating mix of 70% coal and 15% natural gas in 2007 to a mix of 22% coal and 52% natural gas in 2019, along with over 8,300 MWs of renewable resources. This transition has been supported in part by the Southern Company system retiring over 5,600 MWs of coal- and oil-fired generating capacity since 2010 and converting over 3,400 MWs of generating capacity from coal to natural gas since 2015. In addition, Southern Company Gas has replaced approximately 5,600 miles of bare steel and
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cast-iron pipe, resulting in removal of approximately 2.5 million metric tons of GHG from its natural gas distribution system since 1998.
The following table provides the Registrants' 2018 and preliminary 2019 GHG emissions based on ownership or financial control of facilities:
 2018Preliminary 2019
 
(in million metric tons of CO2 equivalent)
Southern Company(a)(b)
102
88
Alabama Power36
32
Georgia Power30
27
Mississippi Power8
9
Southern Power(b)
14
13
Southern Company Gas(b)
1
1
(a)Includes non-registrant subsidiaries.
(b)The 2018 and preliminary 2019 amounts include GHG emissions attributable to disposed assets through the date of the applicable disposition. See Note 15 to the financial statements for additional information regarding disposition activities.
Based on the preliminary 2019 amount above, the Southern Company system has achieved an estimated GHG emission reduction of 44% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. The Southern Company system's ability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas prices, and the development, deployment, and advancement of relevant energy technologies. The Southern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the use of natural gas for generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to lower GHG emissions. The Southern Company system is also evaluating methods of removing carbon from the atmosphere.
Regulatory Matters
Alabama Power
Alabama Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Alabama PSC. Alabama Power currently recovers its costs from the regulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to address current events impacting Alabama Power. See Note 2 to the financial statements under "Alabama Power" for additional information regarding Alabama Power's rate mechanisms and accounting orders.
Petition for Certificate of Convenience and Necessity
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, both as more fully described below, as well as the Autauga Combined Cycle Acquisition. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. This filing was predicated on the results of Alabama Power's 2019 IRP provided to the Alabama PSC, which identified an approximately 2,400-MW resource need for Alabama Power, driven by the need for additional winter reserve capacity. See Note 15 to the financial statements under "Alabama Power" for additional information regarding the Autauga Combined Cycle Acquisition.
The procurement of these resources is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC. The completion of the Autauga Combined Cycle Acquisition is also subject to approval by the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
On May 8, 2019, Alabama Power entered into an Agreement for Engineering, Procurement, and Construction with Mitsubishi Hitachi Power Systems Americas, Inc. and Black & Veatch Construction, Inc. to construct an approximately 720-MW combined cycle facility at Plant Barry (Plant Barry Unit 8), which is expected to be placed in service by the end of 2023.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The capital investment associated with the construction of Plant Barry Unit 8 and the Autauga Combined Cycle Acquisition is currently estimated to total approximately $1.1 billion.
Alabama Power entered into additional long-term PPAs totaling approximately 640 MWs of generating capacity consisting of approximately 240 MWs of combined cycle generation expected to begin later in 2020 and approximately 400 MWs of solar generation coupled with battery energy storage systems (solar/battery systems) expected to begin in 2022 through 2024. The terms of the agreements for the solar/battery systems permit Alabama Power to use the energy and retire the associated renewable energy credits (REC) in service of customers or to sell RECs, separately or bundled with energy.
Upon certification, Alabama Power expects to recover costs associated with Plant Barry Unit 8 pursuant to its Rate CNP New Plant. Additionally, Alabama Power expects to recover costs associated with the Autauga Combined Cycle Acquisition through the inclusion in Rate RSE of revenues from the existing power sales agreement and, on expiration of that agreement, pursuant to Rate CNP New Plant. The recovery of costs associated with laws, regulations, and other such mandates directed at the utility industry are expected to be recovered through Rate CNP Compliance. Alabama Power expects to recover the capacity-related costs associated with the PPAs through its Rate CNP PPA. In addition, fuel and energy-related costs are expected to be recovered through Rate ECR. Any remaining costs associated with the Autauga Combined Cycle Acquisition and Plant Barry Unit 8 will be incorporated through the annual filing of Rate RSE.
The ultimate outcome of these matters cannot be determined at this time.
Construction Work in Progress Accounting Order
On October 1, 2019, the Alabama PSC acknowledged that Alabama Power would begin certain limited preparatory activities associated with Plant Barry Unit 8 construction to meet the target in-service date by authorizing Alabama Power to record the related costs as CWIP prior to the issuance of an order on the CCN petition. Should a CCN not be granted and Alabama Power does not proceed with the related construction of Plant Barry Unit 8, Alabama Power may transfer those costs and any costs that directly result from the non-issuance of the CCN to a regulatory asset which would be amortized over a five-year period. If the balance of incurred costs reaches 5% of the estimated in-service cost of the total project prior to issuance of an order on the CCN petition, Alabama Power will confer with the Alabama PSC regarding the appropriateness of additional authorization. The Sierra Club subsequently filed a petition for reconsideration of the accounting order. The Alabama PSC voted to deny the petition for reconsideration on January 7, 2020.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
In May 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2019, Alabama Power's equity ratio was approximately 50%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, during a year without a Rate RSE upward adjustment, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%. During a year
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with a Rate RSE upward adjustment, if Alabama Power's actual WCER exceeds 6.15%, customers receive 50% of the amount between 6.15% and 6.90% and all amounts in excess of an actual WCER of 6.90%.
In conjunction with these modifications to Rate RSE, in May 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and to return $50 million to customers through bill credits in 2019.
On November 27, 2019, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2020. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2020.
During 2019, Alabama Power provided to the Alabama PSC and the Alabama Office of the Attorney General information related to the operation and utilization of Rate RSE, in accordance with the rules governing the operation of Rate RSE. The ultimate outcome of this matter cannot be determined at this time.
At December 31, 2019, Alabama Power's WCER exceeded 6.15%, resulting in Alabama Power establishing a current regulatory liability of $53 million for Rate RSE refunds, which will be refunded to customers through bill credits in April 2020.
Rate CNP New Plant
Rate CNP New Plant allows for recovery of Alabama Power's retail costs associated with newly developed or acquired certificated generating facilities placed into retail service. No adjustments to Rate CNP New Plant occurred during the period 2017 through 2019. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information.
Rate CNP PPA
Rate CNP PPA allows for the recovery of Alabama Power's retail costs associated with certificated PPAs. No adjustments to Rate CNP PPA occurred during the period 2017 through 2019 and no adjustment is expected for 2020.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to factors that are calculated and submitted to the Alabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On November 27, 2019, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the billing month of January 2020.
Rate ECR
Rate ECR recovers Alabama Power's retail energy costs based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed gives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income but will impact operating cash flows. The Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
On December 3, 2019, the Alabama PSC approved a decrease to Rate ECR from 2.353 to 2.160 cents per KWH, equal to 1.82%, or approximately $102 million annually, effective January 1, 2020. The rate will adjust to 5.910 cents per KWH in January 2021 absent a further order from the Alabama PSC.
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Tax Reform Accounting Order
In May 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power to apply the remaining deferred balance of approximately $39 million to increase the balance in the NDR. See "Rate NDR" herein and Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Joint Ownership Agreements" for additional information regarding the joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to monitor the status of Mississippi Power's proposed RMP and associated regulatory process as well as the proposed transmission and system reliability improvements. Alabama Power will review all the facts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of Plant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR enhance Alabama Power's ability to mitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear.
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
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Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
On April 15, 2019, Alabama Power retired Plant Gorgas Units 8, 9, and 10 and reclassified approximately $654 million of the unrecovered asset balances to regulatory assets, which are being recovered over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 2 to the financial statements under "Alabama Power" and Note 6 to the financial statements for additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. Georgia Power currently recovers its costs from the regulated retail business through an alternate rate plan, which includes traditional base tariffs, Demand-Side Management (DSM) tariffs, the ECCR tariff, and Municipal Franchise Fee (MFF) tariffs. In addition, financing costs on certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariff. See Note 2 to the financial statements under "Georgia PowerRate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%
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(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP continued in effect until December 31, 2019. Furthermore, through December 31, 2019, Georgia Power retained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60/40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariffs, ECCR tariff, DSM tariffs, or MFF tariffs in 2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE was set at 10.95% and earnings were evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% were to be directly refunded to customers, with the remaining one-third retained by Georgia Power. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2019 and 2018, Georgia Power's retail ROE exceeded 12.00% and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia Power has reduced regulatory assets by a total of approximately $110 million and expects to refund a total of approximately $110 million to customers, subject to review and approval by the Georgia PSC. See "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Integrated Resource Plan
See "Environmental Matters" herein for additional information regarding proposed and final EPA rules and regulations, including revisions to ELG for steam electric power plants and additional regulations of CCR and CO2.
On July 16, 2019, the Georgia PSC voted to approve Georgia Power's modified triennial IRP (Georgia Power 2019 IRP). In the Georgia Power 2019 IRP, the Georgia PSC approved the decertification and retirement of Plant Hammond Units 1 through 4 (840 MWs) and Plant McIntosh Unit 1 (142.5 MWs) effective July 29, 2019. In accordance with the 2019 ARP, the remaining net book values at December 31, 2019 of $488 million for the Plant Hammond units are being recovered over a period equal to the respective unit's remaining useful life, which varies between 2024 and 2035, and $30 million for Plant McIntosh Unit 1 is being recovered over a three-year period ending December 31, 2022. In addition, approximately $20 million of related unusable materials and supplies inventory balances and approximately $295 million of net capitalized asset retirement costs were reclassified to a regulatory asset. In accordance with the modifications to the earnings sharing mechanism approved in the 2019 ARP, Georgia Power fully amortized the regulatory assets associated with these unusable materials and supplies inventory
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balances as well as a regulatory asset of approximately $50 million related to costs for a future generation site in Stewart County, Georgia. See "Rate Plans – 2019 ARP" herein for additional information.
Also in the Georgia Power 2019 IRP, the Georgia PSC approved Georgia Power's proposed environmental compliance strategy associated with ash pond and certain landfill closures and post-closure care in compliance with the CCR Rule and the related state rule. In the 2019 ARP, the Georgia PSC approved recovery of the estimated under recovered balance of these compliance costs at December 31, 2019 over a three-year period ending December 31, 2022 and recovery of estimated compliance costs for 2020, 2021, and 2022 over three-year periods ending December 31, 2022, 2023, and 2024, respectively, with recovery of construction contingency beginning in the year following actual expenditure. The under recovered balance at December 31, 2019 was $175 million and the estimated compliance costs expected to be incurred in 2020, 2021, and 2022 are $265 million, $290 million, and $390 million, respectively. The ECCR tariff is expected to be revised for actual expenditures and updated estimates through future annual compliance filings. See "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and "Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Georgia Power's AROs.
On February 4, 2020, the Georgia PSC voted to deny a motion for reconsideration filed by the Sierra Club regarding the Georgia PSC's decision in the 2019 ARP allowing Georgia Power to recover compliance costs for CCR AROs.
Additionally, the Georgia PSC rejected a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020 following the expiration of a wholesale PPA. Georgia Power may offer such capacity in the wholesale market or to the retail jurisdiction in a future IRP.
The Georgia PSC also approved Georgia Power to (i) issue requests for proposals (RFP) for capacity beginning in 2022 or 2023 and in 2026, 2027, or 2028; (ii) procure up to an additional 2,210 MWs of renewable resources through competitive RFPs; and (iii) invest in a portfolio of up to 80 MWs of battery energy storage technologies.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. Georgia Power is scheduled to file its next fuel case no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million. At December 31, 2019, Georgia Power's over recovered fuel balance was $73 million.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's or Georgia Power's revenues or net income but will affect operating cash flows.
Storm Damage Recovery
Beginning January 1, 2020, Georgia Power is recovering $213 million annually through December 31, 2022, as provided in the 2019 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2019, the balance in the regulatory asset related to storm damage was $410 million. The rate of storm damage cost recovery is expected to be adjusted in future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's or Georgia Power's financial statements. See Note 2 to the financial statements under "Georgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.
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2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 currently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,
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deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.
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Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion,
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and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 to the financial statements for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and Mississippi Power's financial statements.
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Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale
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cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information regarding infrastructure replacement programs at certain of the natural gas distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(a)Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.
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Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.
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Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Programs
The Registrants are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations.
For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the financial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See "Southern Company Gas" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities and certain pipeline construction projects.
See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein for additional information regarding the Registrants' capital requirements for their construction programs, including estimated totals for each of the next five years.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement,
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which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Services Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events.
See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However,
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Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
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Southern Company and Subsidiary Companies 2019 Annual Report

Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,
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$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.
The ultimate outcome of these matters cannot be determined at this time.
Southern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
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(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 2019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure. In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential
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variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Rate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in two significant pipeline construction projects within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approval.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.
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Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was no impairment as of December 31, 2019.
See Notes 3 and 7 to the financial statements under "Guarantees" and "Southern Company GasEquity Method Investments," respectively, for additional information on these pipeline projects.
Southern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and
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from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Consolidated Income Taxes
On behalf of the Registrants, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect each Registrant's ability to utilize certain tax credits. See "Tax Credits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 10 to the financial statements for additional information.
Federal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.
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Bonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service after September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to result in positive cash flows for the Registrants as follows:
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Cash flows resulting from bonus depreciation for Southern Power would also be impacted by Southern Power's use of tax equity partnerships.
See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Tax Credits
The Tax Reform Legislation retained solar energy incentives of 30% ITC for projects that commenced construction by December 31, 2019; 26% ITC for projects that commence construction in 2020; 22% ITC for projects that commence construction in 2021; and a permanent 10% ITC for projects that commence construction on or after January 1, 2022. In addition, the Tax Reform Legislation retained wind energy incentives of 100% PTC for projects that commenced construction in 2016; 80% PTC for projects that commenced construction in 2017; 60% PTC for projects that commenced construction in 2018; and 40% PTC for projects that commenced construction in 2019. As a result of a tax extenders bill passed in December 2019, projects that begin construction in 2020 will be entitled to 60% PTC. Projects commencing construction after 2020 will not be entitled to any PTCs. Southern Company has received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power.
Southern Power's ITCs relate to its investment in new solar facilities acquired or constructed and its PTCs relate to the first 10 years of energy production from its wind facilities, which have had, and may continue to have, a material impact on Southern Power's cash flows and net income. At December 31, 2019, Southern Company and Southern Power had approximately $1.8 billion and $1.4 billion, respectively, of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2024, but could be further delayed. Since 2018, Southern Power has been utilizing tax equity partnerships for wind and solar projects, where the tax partner takes significantly all of the respective federal tax benefits. These tax equity partnerships are consolidated in Southern Company's and Southern Power's financial statements using the HLBV methodology to allocate partnership gains and losses. See Note 1 to the financial statements under "General" for additional information on the HLBV methodology and Note 1 to the financial statements under "Income Taxes" and Note 10 to the financial statements under "Deferred Tax Assets and LiabilitiesTax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax benefit related to associated basis differences.
General Litigation Matters
The Registrants are involved in various other matters being litigated and regulatory matters that could affect future earnings. The ultimate outcome of such pending or potential litigation or regulatory matters against each Registrant and any subsidiaries cannot be determined at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on such Registrant's financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
The Registrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.
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Southern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper
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application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and three members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included four additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Other Matters
Southern Company
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows. See Note 1 to the financial statements under "Leveraged Leases" for additional information.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation.
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While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not return to service by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has two other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million at December 31, 2019.
The ultimate outcome of these matters cannot be determined at this time, but could have a material impact on the financial statements of Southern Company and Southern Company Gas.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Registrants prepare their financial statements in accordance with GAAP. Significant accounting policies are described in the notes to the financial statements. In the application of these policies, certain estimates are made that may have a material impact
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on the results of operations and related disclosures of the applicable Registrants (as indicated in the section descriptions herein). Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The traditional electric operating companies and the natural gas distribution utilities are subject to retail regulation by their respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the FERC. These regulatory agencies set the rates the traditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result, the traditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards for rate regulated entities also impacts their financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the results of operations and financial condition of the applicable Registrants than they would on a non-regulated company.
Revenues related to regulated utility operations as a percentage of total operating revenues in 2019 for the applicable Registrants were as follows: 87% for Southern Company, 99% for Alabama Power, 97% for Georgia Power, 100% for Mississippi Power, and 80% for Southern Company Gas.
As reflected in Note 2 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the financial statements of the applicable Registrants.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
(Southern Company and Georgia Power)
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In 2017, the Georgia PSC approved Georgia Power's seventeenth VCM report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for Unit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion, respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the base capital cost forecast in the nineteenth VCM report. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory
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proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However, Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or
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not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as well as the potential impact on results of operations and cash flows, Southern Company and Georgia Power consider these items to be critical accounting estimates. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information.
Accounting for Income Taxes (Southern Company, Mississippi Power, Southern Power, and Southern Company Gas)
The consolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the various states in which the Southern Company system operates.
On behalf of its subsidiaries, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited or utilized at the consolidated or combined level resulting in NOL and tax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and tax credit carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of Southern Company's and its subsidiaries' current financial position and results of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on the financial statements of the applicable Registrants.
Given the significant judgment involved in estimating NOL and tax credit carryforwards and multi-state apportionments for all subsidiaries, the applicable Registrants consider deferred income tax liabilities and assets to be critical accounting estimates.
Asset Retirement Obligations (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
AROs are computed as the present value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The ARO liabilities for the traditional electric operating companies primarily relate to facilities that are subject to the CCR Rule and the related state rules, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of nuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2). The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and for Mississippi Power, mine reclamation and water wells.
The traditional electric operating companies and Southern Company Gas also have identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these
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assets have not been recorded because the settlement timing for certain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule and the related state rules. The traditional electric operating companies expect to update their ARO cost estimates periodically as additional information related to these assumptions becomes available. See Note 6 to the financial statements for additional information, including increases to AROs related to ash ponds recorded during 2019 by certain Registrants.
Given the significant judgment involved in estimating AROs, the applicable Registrants consider the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The applicable Registrants' calculations of pension and other postretirement benefits expense are dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term rate of return (LRR) on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the applicable Registrants believe the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect their pension and other postretirement benefit costs and obligations.
Key elements in determining the applicable Registrants' pension and other postretirement benefit expense are the LRR and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. For purposes of determining the applicable Registrants' liabilities related to the pension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. The discount rate assumption impacts both the service cost and non-service costs components of net periodic benefit costs as well as the projected benefit obligations.
The LRR on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations that consider external actuarial advice, and represents the average rate of earnings expected over the long term on the assets invested to provide for anticipated future benefit payments. Southern Company determines the amount of the expected return on plan assets component of non-service costs by applying the LRR of various asset classes to Southern Company's target asset allocation. The LRR only impacts the non-service costs component of net periodic benefit costs for the following year and is set annually at the beginning of the year.
For 2019, the LRR assumption for qualified pension plan assets was reduced from 7.95% to 7.75% for purposes of determining net periodic pension expense as a result of changes in the economic outlook used in estimating the expected returns as of December 31, 2018. As a result of the decrease in the LRR, the non-service costs component of net periodic pension expense increased by $24 million for the Southern Company system in 2019. See the table below for the impact on each Registrant.
Table of ContentsIndex to Financial Statements

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

For 2020, net periodic pension expense will be impacted by two factors: a change in the approach used to determine the LRR assumption and cash contributions totaling $1.1 billion to the qualified pension plan made in December 2019. Historically, Southern Company has set the LRR assumption using asset return modeling based on geometric returns that reflect the compound average returns for dependent annual periods. Beginning in 2020, Southern Company will set the LRR assumption using an arithmetic mean which represents the expected simple average return to be earned by the pension plan assets over any one year. Southern Company believes the use of the arithmetic mean is more compatible with the LRR's function of estimating a single year's investment return. Excluding the additional pension contribution in December 2019, the change in the LRR assumption will reduce the non-service costs component of net periodic pension expense by $78 million for the Southern Company system in 2020. See the table below for the impact on each Registrant. The contributions in 2019 will further reduce expense by $88 million for the Southern Company system in 2020.
 Southern Company
Alabama
Power
Georgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Increase (decrease) in pension expense:   
2019$24
$5
$8
$1
$2
2020(78)(18)(25)(4)(7)
The following table illustrates the sensitivity to changes in the applicable Registrants' long-term assumptions with respect to the discount rate, salary increases, and the long-term rate of return on plan assets:
Increase/(Decrease) in
25 Basis Point Change in:Total Benefit Expense for 2020Projected Obligation for Pension Plan at December 31, 2019
Projected Obligation for
Other Postretirement
Benefit Plans at December 31, 2019
(in millions)
Discount rate:
Southern Company$41/$(39)$549/$(518)$57/$(54)
Alabama Power$10/$(10)$131/$(123)$14/$(13)
Georgia Power$12/$(11)$166/$(156)$21/$(20)
Mississippi Power$2/$(2)$25/$(23)$2/$(2)
Southern Company Gas$1/$(1)$38/$(36)$6/$(6)
Salaries:
Southern Company$23/$(22)$118/$(113)$–/$–
Alabama Power$6/$(6)$33/$(32)$–/$–
Georgia Power$6/$(6)$34/$(33)$–/$–
Mississippi Power$1/$(1)$5/$(5)$–/$–
Southern Company Gas$1/$(1)$3/$(3)$–/$–
Long-term return on plan assets:
Southern Company$35/$(35)N/AN/A
Alabama Power$9/$(9)N/AN/A
Georgia Power$11/$(11)N/AN/A
Mississippi Power$2/$(2)N/AN/A
Southern Company Gas$3/$(3)N/AN/A
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Asset Impairment (Southern Company, Southern Power, and Southern Company Gas)
Goodwill (Southern Company and Southern Company Gas)
The acquisition method of accounting requires the assets acquired and liabilities assumed to be recorded at the date of acquisition at their respective estimated fair values. The applicable Registrants have recognized goodwill as of the date of their acquisitions, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the fourth quarter of the year as well as on an interim basis as events and changes in circumstances occur, including, but not limited to, a significant change in operating performance, the business climate, legal or regulatory factors, or a planned sale or disposition of a significant portion of the business. A reporting unit is the operating segment, or a business one level below the operating segment (a component), if discrete financial information is prepared and regularly reviewed by management. Components are aggregated if they have similar economic characteristics.
As part of the impairment tests, the applicable Registrant may perform an initial qualitative assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount before applying the quantitative goodwill impairment test. If the applicable Registrant elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If the applicable Registrant determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it compares the fair value of the reporting unit to its carrying value to determine if the fair value is greater than its carrying value.
Goodwill for Southern Company and Southern Company Gas was $5.3 billion and $5.0 billion, respectively, at December 31, 2019. For its 2019 and 2018 annual impairment tests, Southern Company Gas performed the qualitative assessment and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For its 2017 annual impairment test, Southern Company Gas performed the quantitative assessment, which resulted in the fair value of all of its reporting units that have goodwill exceeding their carrying value. For its annual impairment tests for PowerSecure, Southern Company performed the quantitative assessment, which resulted in the fair value of goodwill at PowerSecure exceeding its carrying value in all years presented. However, Southern Company recorded goodwill impairment charges totaling $34 million in 2019 as a result of its decision to sell certain PowerSecure business units. See Note 15 to the financial statements under "Southern Company" for additional information.
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can significantly impact the applicable Registrant's results of operations. Fair values and useful lives are determined based on, among other factors, the expected future period of benefit of the asset, the various characteristics of the asset, and projected cash flows. As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 1 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities" for additional information regarding the applicable Registrants' goodwill.
Long-Lived Assets (Southern Company, Southern Power, and Southern Company Gas)
Impairments of long-lived assets of the traditional electric utilities and natural gas distribution utilities are generally related to specific regulatory disallowances. The applicable Registrants assess their other long-lived assets for impairment whenever events or changes in circumstances indicate that an asset's carrying amount may not be recoverable. If an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of the undiscounted expected future cash flows directly attributable to the asset's use and eventual disposition. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determined and a loss is recorded equal to the difference between the carrying value and the fair value of the asset. In addition, when assets are identified as held for sale, an impairment loss is recognized to the extent the carrying value of the assets or asset group exceeds their fair value less cost to sell. A high degree of judgment is required in developing estimates related to these evaluations, which are based on projections of various factors, some of which have been quite volatile in recent years.
Southern Power's investments in long-lived assets are primarily generation assets, whether in service or under construction. Excluding the natural gas distribution utilities, Southern Company Gas' investments in long-lived assets are primarily natural gas transportation and storage facility assets, whether in service or under construction. In addition, exclusive of the traditional electric operating companies and natural gas distribution utilities, Southern Company's investments in long-lived assets also include investments in leveraged leases.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

For Southern Power, examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to remarket generating capacity for an extended period, the unplanned termination of a customer contract or the inability of a customer to perform under the terms of the contract, or the inability to deploy wind turbine equipment to a development project. For Southern Company Gas, examples of impairment indicators could include, but are not limited to, significant changes in the U.S. natural gas storage market, construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to renew or extend customer contracts or the inability of a customer to perform under the terms of the contract, attrition rates, or the inability to deploy a development project. For Southern Company's investments in leveraged leases, impairment indicators include changes in estimates of future rental payments to be received under the lease as well as the residual value of the leased asset at the end of the lease.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 3 to the financial statements under "Other Matters" and Note 15 to the financial statements for information on certain assets recently evaluated for impairment.
Derivatives and Hedging Activities (Southern Company and Southern Company Gas)
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in the applicable Registrant's assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value of derivative instruments may change significantly from period to period depending upon market conditions, and changes in hedge effectiveness may impact the accounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. If the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempt from fair value accounting treatment and is, instead, subject to traditional accrual accounting. The applicable Registrant utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI on the balance sheets until the hedged transaction affects earnings in the case of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as document and assess the effectiveness of derivatives associated with transactions that receive hedge accounting treatment.
Southern Company Gas uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and, to a lesser extent, Southern Company Gas hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that Southern Company Gas would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
Derivative assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of nonperformance risk on liabilities.
A significant change in the underlying market prices or pricing assumptions used in pricing derivative assets or liabilities may result in a significant financial statement impact.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Given the assumptions used in pricing the derivative asset or liability, Southern Company and Southern Company Gas consider the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Note 14 to the financial statements for more information.
Revenue Recognition (Southern Power)
Southern Power's power sale transactions, which include PPAs, are classified in one of four general categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges, as described further below. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 14 to the financial statements. Southern Power's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
Southern Power considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;
Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the counterparty substantially all of the economic benefits and the right to direct the use of the asset.
If the contract meets the above criteria for a lease, Southern Power performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of Southern Power's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in Southern Power's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered. See Note 9 to the financial statements for additional information.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, Southern Power further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within Southern Power's available generating capacity) are accounted for as executory contracts. For contracts that have a capacity charge, the revenue is generally recognized in the period that it becomes billable. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. See Note 4 to the financial statements for additional information.
Cash Flow Hedge Transactions
Southern Power further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and
Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Derivative (Non-Hedge) Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Acquisition Accounting (Southern Power)
Southern Power may acquire generation assets as part of its overall growth strategy. At the time of an acquisition, Southern Power will assess if these assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, the purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets, primarily related to acquired PPAs). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired.
Determining the fair value of assets acquired and liabilities assumed requires management judgment and Southern Power may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions, and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by Southern Power for potential or successful acquisitions are expensed as incurred.
Contingent consideration primarily relates to fixed amounts due to the seller once the facility is placed in service. For contingent consideration with variable payments, Southern Power fair values the arrangement with any changes recorded in the consolidated statements of income. See Note 13 to the financial statements for additional fair value information and Note 15 to the financial statements for additional information on recent acquisitions.
Variable Interest Entities (Southern Power)
Southern Power enters into partnerships with varying ownership structures. Upon entering into such arrangements, membership interests and other variable interests are evaluated to determine if the legal entity is a VIE. If the legal entity is a VIE, Southern Power will assess if it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE, making it the primary beneficiary. Making this determination may require significant management judgment.
If Southern Power is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. If Southern Power is not the primary beneficiary, the legal entity is generally accounted for under the equity method of accounting. Southern Power reconsiders its conclusions as to whether the legal entity is a VIE and whether it is the primary beneficiary for events that impact the rights of variable interests, such as ownership changes in membership interests.
Southern Power has partial ownership in certain legal entities for which the contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits are not based on fixed ownership percentages. For these arrangements, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period.
Contingent Obligations (All Registrants)
The Registrants are subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject them to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. The Registrants periodically evaluate their exposure to such risks and record reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect the results of operations, cash flows, or financial condition of the Registrants.
Recently Issued Accounting Standards
See Note 1 to the financial statements under "Recently Adopted Accounting Standards" for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. The Registrants adopted the new standard effective January 1, 2019. See Note 9 to the financial statements for additional information and related disclosures.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

FINANCIAL CONDITION AND LIQUIDITY
Overview
The financial condition of each Registrant remained stable at December 31, 2019. The Registrants' cash requirements primarily consist of funding ongoing operations, including unconsolidated subsidiaries, as well as common stock dividends, capital expenditures, and debt maturities. Southern Power's cash requirements also include distributions to noncontrolling interests. Capital expenditures and other investing activities for the traditional electric operating companies include investments to meet projected long-term demand requirements, including to build new generation facilities, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Southern Power's capital expenditures and other investing activities may include acquisitions or new construction associated with its overall growth strategy and to maintain its existing generation fleet's performance. Southern Company Gas' capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations.
Operating cash flows provide a substantial portion of the Registrants' cash needs. During 2019, Southern Power utilized tax credits, which provided $734 million in operating cash flows. For the three-year period from 2020 through 2022, each Registrant's projected stock dividends, capital expenditures, and debt maturities, as well as distributions to noncontrolling interests for Southern Power, are expected to exceed its operating cash flows. Southern Company plans to finance future cash needs in excess of its operating cash flows primarily by accessing borrowings from financial institutions and issuing debt and hybrid securities in the capital markets. Each Subsidiary Registrant plans to finance its future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings through the FFB and Southern Power plans to utilize tax equity partnership contributions. The Registrants plan to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs and continue to monitor their access to short-term and long-term capital markets as well as their bank credit arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," "Capital Requirements," and "Contractual Obligations" herein for additional information.
The Registrants' investments in their qualified pension plans and Alabama Power's and Georgia Power's investments in their nuclear decommissioning trust funds increased in value at December 31, 2019 as compared to December 31, 2018. In December 2019, the Registrants voluntarily contributed the following amounts to the qualified pension plan:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Contributions to qualified pension plan$1,136
$362
$200
$54
$24
$145
No mandatory contributions to the qualified pension plans are anticipated during 2020. See "Contractual Obligations" herein and Notes 6 and 11 to the financial statements under "Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
At the end of 2019, the market price of Southern Company's common stock was $63.70 per share (based on the closing price as reported on the NYSE) and the book value was $26.11 per share, representing a market-to-book value ratio of 244%, compared to $43.92, $23.91, and 184%, respectively, at the end of 2018.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Analysis of Cash Flows
Net cash flows provided from (used for) operating, investing, and financing activities in 2019 and 2018 are presented in the following table:
Net cash provided from (used for):Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Operating activities$5,781
$1,779
$2,907
$339
$1,385
$1,067
Investing activities(3,392)(1,963)(3,885)(263)(167)(1,386)
Financing activities(1,930)765
918
(83)(1,120)298
       
2018      
Operating activities$6,945
$1,881
$2,769
$804
$631
$764
Investing activities(5,760)(2,289)(3,109)(232)(227)998
Financing activities(1,813)177
(400)(527)(363)(1,770)
Fluctuations in cash flows from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Southern Company
Net cash provided from operating activities decreased $1.2 billion in 2019 as compared to 2018 primarily due to the voluntary contribution to the qualified pension plan and the timing of vendor payments.
The net cash used for investing activities in 2019 and 2018 was primarily due to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, and capital expenditures for Southern Company Gas' infrastructure replacement programs, partially offset by proceeds from the sale transactions described in Note 15 to the financial statements, which totaled $5.1 billion and $3.0 billion in 2019 and 2018, respectively.
The net cash used for financing activities in 2019 was primarily due to common stock dividend payments and net repayments of short-term bank debt and commercial paper, partially offset by net issuances of long-term debt and the issuance of common stock. The net cash used for financing activities in 2018 was primarily due to net redemptions and repurchases of long-term debt, common stock dividend payments, and a decrease in commercial paper borrowings, partially offset by net issuances of short-term bank debt, proceeds from Southern Power's sales of non-controlling equity interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities, and the issuance of common stock.
Alabama Power
Net cash provided from operating activities decreased $102 million in 2019 as compared to 2018primarily due to the voluntary contribution to the qualified pension plan, partially offset by the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and increased fuel cost recovery.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and a long-term debt issuance, partially offset by payments of common stock dividends and a maturity of long-term debt. The net cash provided from financing activities in 2018 was primarily due to issuances of long-term debt and additional capital contributions from Southern Company, partially offset by the payment of common stock dividends and a maturity of long-term debt.
Georgia Power
Net cash provided from operating activities increased $138 million in 2019 as compared to 2018 primarily due to lower customer refunds and increased fuel cost recovery, partially offset by the voluntary contribution to the qualified pension plan.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions, including a total of $2.5 billion related to the construction of Plant Vogtle Units 3 and 4. See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein for additional information on construction of Plant Vogtle Units 3 and 4.
The net cash provided from financing activities in 2019 was primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, capital contributions from Southern Company, and pollution control revenue bonds reoffered to the public, partially offset by payment of common stock dividends and the maturity of senior notes. The net cash used for financing activities in 2018 was primarily due to the redemption and repurchase of senior notes, payment of common stock dividends, and pollution control revenue bond repurchases, partially offset by capital contributions from Southern Company.
Mississippi Power
Net cash provided from operating activities decreased $465 million in 2019 as compared to 2018 primarily due to higher income tax refunds in 2018 as a result of the tax impact of the abandonment of the Kemper IGCC and the voluntary contribution to the qualified pension plan in 2019.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash used for financing activities in 2019 was primarily due to a return of capital to Southern Company and the redemption of senior notes, partially offset by capital contributions from Southern Company and pollution control revenue bonds reoffered to the public. The net cash used for financing activities in 2018 was primarily due to the redemption of preferred stock, long-term bank debt, short-term borrowings, and senior notes, partially offset by the issuance of senior notes and short-term borrowings.
Southern Power
Net cash provided from operating activities increased $754 million in 2019 as compared to 2018 primarily due to the utilization of federal ITCs totaling $734 million in 2019. At December 31, 2019, Southern Power had $1.4 billion of unutilized ITCs and PTCs which are expected to be fully utilized by 2024. See FUTURE EARNINGS POTENTIAL – "Income Tax MattersTax Credits" herein for additional information.
The net cash used for investing activities in 2019 was primarily due to Southern Power's investment in DSGP and ongoing construction activities, largely offset by proceeds from the sales of Plant Nacogdoches and certain wind turbine equipment. The net cash used for investing activities in 2018 was primarily due to the construction of generating facilities and payments for renewable acquisitions, partially offset by proceeds from the disposition of the Florida Plants. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions" and "Construction Programs" herein and Note 15 to the financial statements for additional information.
The net cash used for financing activities in 2019 was primarily due to returns of capital to Southern Company, the repayment at maturity of senior notes, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by proceeds from net issuances of commercial paper. The net cash used for financing activities in 2018 was primarily due to returns of capital to Southern Company, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by capital contributions from noncontrolling interests.
Southern Company Gas
Net cash provided from operating activities increased $303 million in 2019 as compared to 2018 primarily due to the timing of collection of customer receivables and lower income tax payments, partially offset by the timing of vendor payments and the voluntary contribution to the qualified pension plan.
The net cash used for investing activities in 2019 was primarily due to gross property additions related to utility capital expenditures and infrastructure investments recovered through replacement programs at gas distribution operations and capital contributed to equity method pipeline investments, partially offset by proceeds from the sale of Triton and capital distributions in excess of earnings from equity method pipeline investments. The net cash provided from investing activities in 2018 was primarily due to proceeds from the Southern Company Gas Dispositions, partially offset by gross property additions primarily related to utility capital expenditures and pre-approved rider and infrastructure investments recovered through replacement programs at gas distribution operations as well as net capital contributions to equity method pipeline investments.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and proceeds from the issuance of first mortgage bonds, partially offset by the redemption of long-term debt and payments of common stock dividends. The net cash used for financing activities in 2018 was primarily due to payments of common stock dividends to
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company, return of capital to Southern Company, redemptions of gas facility revenue bonds and senior notes, and repayments of commercial paper borrowings and long-term debt, partially offset by debt issuances and capital contributions from Southern Company.
Significant Balance Sheet Changes
Southern Company
Significant balance sheet changes in 2019 for Southern Company included:
decreases in assets and liabilities held for sale of $5.0 billion and $3.3 billion, respectively, and an increase of $2.7 billion in total stockholders' equity primarily related to the sale of Gulf Power;
an increase of $2.3 billion in total property, plant, and equipment primarily related to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, net of $1.2 billion and $1.0 billion reclassified to other regulatory assets and regulatory assets associated with AROs, respectively, as a result of generating unit retirements at Alabama Power and Georgia Power;
an increase in other regulatory assets of $1.8 billion primarily related to the $1.2 billion reclassification from property, plant, and equipment discussed above and a $0.8 billion increase in regulatory assets associated with retiree benefit plans primarily resulting from a decrease in the overall discount rate used to calculate benefit obligations;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.8 billion, recorded upon the adoption of ASC 842;
an increase of $1.4 billion in regulatory assets associated with AROs primarily related to the $1.0 billion reclassification from property, plant, and equipment discussed above and ARO revisions at Alabama Power and Mississippi Power related to the CCR Rule;
an increase of $1.3 billion in accumulated deferred income taxes primarily related to the expected utilization of tax credit carryforwards in the 2019 tax year as a result of increased taxable income from the sale of Gulf Power; and
a decrease of $0.9 billion in notes payable related to net repayments of short-term bank debt and commercial paper.
See Notes 2, 5, 6, 8, 9, 10, 11, and 15 to the financial statements for additional information.
Alabama Power
Significant balance sheet changes in 2019 for Alabama Power included:
an increase of $1.5 billion in total common stockholder's equity primarily due to a $1.2 billion capital contribution from Southern Company;
increases of $0.9 billion in regulatory assets associated with AROs and $0.7 billion in other regulatory assets, deferred primarily due to the impacts of retiring and reclassifying Plant Gorgas Units 8, 9, and 10;
an increase of $0.6 billion in cash and cash equivalents; and
an increase of $0.3 billion in AROs, deferred primarily due to an increase in the ARO estimate related to ash pond facilities.
See Notes 2 and 6 to the financial statements for additional information.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power
Significant balance sheet changes in 2019 for Georgia Power included:
an increase of $1.8 billion in long-term debt (including securities due within one year) primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, and pollution control revenue bonds being reoffered to the public;
an increase of $1.6 billion in property, plant, and equipment to comply with environmental standards and the construction of generation, transmission, and distribution facilities, net of approximately $0.8 billion reclassified to regulatory assets due to the retirement of certain generating units as approved in the Georgia Power 2019 IRP;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.4 billion, recorded upon the adoption of ASC 842;
an increase of $1.2 billion in regulatory assets primarily due to the $0.8 billion reclassification from property, plant, and equipment discussed above and $0.2 billion associated with retiree benefit plans primarily as a result of a decrease in the overall discount rate used to calculate benefit obligations; and
an increase of $742 million in total common stockholder's equity primarily due to capital contributions from Southern Company.
See Notes 2, 8, 9, and 11 to the financial statements for additional information.
Mississippi Power
Significant balance sheet changes in 2019 for Mississippi Power included:
a decrease of $231 million in long-term debt, primarily due to the reclassification of $249 million of senior notes to securities due within one year and the redemption of $25 million of senior notes, partially offset by $43 million in pollution control revenue bonds reoffered to the public;
an increase of $107 million in other property and investments primarily due to a new tolling arrangement accounted for as a sales-type lease;
increases of $67 million in regulatory assets associated with AROs and $31 million in AROs, deferred primarily due to ARO revisions; and
a net change of $57 million in accumulated deferred income tax assets and liabilities primarily due to the recognition of a tax loss on the CO2 pipeline transfer and the alternative minimum tax carryforward from prior years.
See Notes 2, 6, 8, 9, and 10 to the financial statements for additional information.
Southern Power
Significant balance sheet changes in 2019for Southern Power included:
a $662 million decrease in stockholders' equity due to returns of capital to Southern Company;
a $635 million decrease in accumulated deferred income tax assets primarily related to the utilization of tax credits for the 2019 tax year;
a $619 million decrease in long-term debt (including securities due within one year) related to the maturity of $600 million in senior notes;
a $449 million increase in notes payable due to net issuances of commercial paper; and
increases in operating lease right-of-use assets, net of amortization and operating lease obligations totaling $369 million and $376 million, respectively, recorded upon the adoption of ASC 842.
See Notes 8, 9, and 10 to the financial statements for additional information.
Southern Company Gas
Significant balance sheet changes in 2019 for Southern Company Gas included:
an increase of $950 million in property, plant, and equipment primarily due to utility capital expenditures and infrastructure investments recovered through replacement programs, partially offset by $115 million of asset impairment charges;
additional paid-in-capital of $841 million primarily related to capital contributions from Southern Company;
decreases of $373 million and $414 million in energy marketing receivables and payables, respectively, due to lower natural gas prices and volumes of natural gas sold;
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

a $287 million decrease in equity investments in unconsolidated subsidiaries primarily due to $151 million associated with Pivotal LNG and Atlantic Coast Pipeline reclassified to assets held for sale, as well as distributions from SNG and the sale of Triton;
a $203 million increase in accumulated deferred income taxes primarily due to accelerated tax depreciation and other timing differences;
reclassification of $171 million in total assets held for sale associated with Pivotal LNG and Atlantic Coast Pipeline;
a $95 million decrease in long-term debt primarily due to the redemption of $300 million in senior notes and the repayment of $50 million in first mortgage bonds, partially offset by the issuance of $300 million in first mortgage bonds; and
increases of $93 million in operating right-of-use assets and $92 million in operating lease obligations, respectively, related to the adoption of ASC 842.
See Notes 3, 7, 8, 9, 10, and 15 to the financial statements for additional information.
Sources of Capital
Southern Company intends to meet its future capital needs through operating cash flows, borrowings from financial institutions, and debt and equity issuances in the capital markets. Equity capital can be provided from any combination of Southern Company's stock plans, private placements, or public offerings. Southern Company does not expect to issue any equity in the capital markets through 2024.
The Subsidiary Registrants plan to obtain the funds to meet their future capital needs from sources similar to those they used in the past, which were primarily from operating cash flows, external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings from the FFB, as discussed further in Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings," Southern Power plans to utilize tax equity partnership contributions, as discussed further herein, and Southern Company Gas plans to utilize proceeds from the pending sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, as discussed further in Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline."
The amount, type, and timing of any financings in 2020, as well as in subsequent years, will be contingent on investment opportunities and the Registrants' capital requirements and will depend upon prevailing market conditions, regulatory approvals (for the Subsidiary Registrants), and other factors. See "Capital Requirements" herein for additional information.
Southern Power utilizes tax equity partnerships as one of its financing sources, where the tax partner takes significantly all of the federal tax benefits. These tax equity partnerships are consolidated in Southern Power's financial statements and are accounted for using HLBV methodology to allocate partnership gains and losses. During 2019, Southern Power obtained tax equity funding for the Wildhorse Mountain wind project and received proceeds of $97 million. See Notes 1 and 15 to the financial statements under "General" and "Southern Power," respectively, for additional information.
The issuance of securities by the traditional electric operating companies and Nicor Gas is generally subject to the approval of the applicable state PSC or other applicable state regulatory agency. The issuance of all securities by Mississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Southern Company, the traditional electric operating companies, and Southern Power (excluding its subsidiaries), Southern Company Gas Capital, and Southern Company Gas (excluding its other subsidiaries) file registration statements with the SEC under the Securities Act of 1933, as amended (1933 Act). The amounts of securities authorized by the appropriate regulatory authorities, as well as the securities registered under the 1933 Act, are closely monitored and appropriate filings are made to ensure flexibility in the capital markets.
The Registrants generally obtain financing separately without credit support from any affiliate. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of each company are not commingled with funds of any other company in the Southern Company system, except in the case of Southern Company Gas, as described below.
The traditional electric operating companies and SEGCO may utilize a Southern Company subsidiary organized to issue and sell commercial paper at their request and for their benefit. Proceeds from such issuances for the benefit of an individual company are loaned directly to that company. The obligations of each traditional electric operating company and SEGCO under these arrangements are several and there is no cross-affiliate credit support. Alabama Power also maintains its own separate commercial paper program.
Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. Southern Company Gas maintains commercial
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

paper programs at Southern Company Gas Capital and Nicor Gas. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of the other Southern Company Gas subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2019, the amount of subsidiary retained earnings restricted to dividend totaled $951 million. This restriction did not impact Southern Company Gas' ability to meet its cash obligations, nor does management expect such restriction to materially impact Southern Company Gas' ability to meet its currently anticipated cash obligations.
The Registrants' current liabilities frequently exceed their current assets because of long-term debt maturities and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs. See Note 8 to the financial statements for additional information. Also see "Financing Activities" herein for information on issuances of long-term debt subsequent to December 31, 2019. At December 31, 2019, the following Registrants' current liabilities exceeded their current assets, primarily as a result of securities due within one year and notes payable, as shown in the table below:
At December 31, 2019
Southern Company(*)
Georgia
Power
Mississippi PowerSouthern Power
 (in millions)
Current liabilities in excess of current assets$2,729
$1,902
$125
$945
Securities due within one year2,989
1,025
281
824
Notes payable2,055
365

549
(*)Includes $600 million and $465 million of securities due within one year and notes payable, respectively, at the parent company.
The Registrants believe the need for working capital can be adequately met by utilizing operating cash flows, as well as commercial paper, lines of credit, and short-term bank notes, as market conditions permit. In addition, under certain circumstances, the Subsidiary Registrants may utilize equity contributions and/or loans from Southern Company.
Bank Credit Arrangements
At December 31, 2019, the Registrants' unused committed credit arrangements with banks were as follows:
At December 31, 2019
Southern
Company
parent
Alabama PowerGeorgia
Power
Mississippi Power
Southern
 Power(a)
Southern Company Gas(b)
SEGCO
Southern
Company
 (in millions)
Unused committed credit$1,999
$1,328
$1,733
$150
$591
$1,745
$30
$7,576
(a)At December 31, 2019, Southern Power also had a continuing letter of credit facility for standby letters of credit, of which $23 million was unused. Subsequent to December 31, 2019, Southern Power entered into an additional $60 million continuing letter of credit facility for standby letters of credit. Southern Power's subsidiaries are not parties to its bank credit arrangement or to the letter of credit facilities.
(b)Includes $1.245 billion and $500 million at Southern Company Gas Capital and Nicor Gas, respectively.
Subject to applicable market conditions, the Registrants, Nicor Gas, and SEGCO expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, the Registrants, Nicor Gas, and SEGCO may extend the maturity dates and/or increase or decrease the lending commitments thereunder. A portion of the unused credit with banks is allocated to provide liquidity support to the revenue bonds of the traditional electric operating companies and the commercial paper programs of the Registrants, Nicor Gas, and SEGCO. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
Short-term Borrowings
The Registrants, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Southern Power's subsidiaries are not issuers or obligors under its commercial paper program. Commercial paper and short-term bank term loans are included in notes payable in the balance sheets. Details of the Registrants' short-term borrowings were as follows:
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Short-term Debt at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 December 31, December 31,
 201920182017 201920182017
 (in millions)    
Southern Company$2,055
$2,915
$2,439
 2.1%3.1%1.9%
Alabama Power

3
 

3.7
Georgia Power365
294
150
 2.2
3.1
2.2
Mississippi Power

4
 

3.8
Southern Power549
100
105
 2.2
3.1
2.0
Southern Company Gas:





    
Southern Company Gas Capital$372
$403
$1,243
 2.1%3.1%1.7%
Nicor Gas278
247
275
 1.8
3.0
1.8
Southern Company Gas Total$650
$650
$1,518
 2.0%3.0%1.8%
 
Short-term Debt During the Period(*)
 Average Amount Outstanding 
Weighted Average
Interest Rate
 Maximum Amount Outstanding
 201920182017 201920182017 201920182017
 (in millions)     (in millions)
Southern Company$1,240
$3,377
$2,672
 2.6%2.6%1.5% $2,914
$5,447
$3,668
Alabama Power17
27
25
 2.6
2.3
1.3
 190
258
223
Georgia Power371
139
427
 2.7
2.5
1.8
 935
710
1,460
Mississippi Power
68
18
 
2.0
3.0
 
300
36
Southern Power76
188
232
 2.7
2.5
1.4
 578
385
419
Southern Company Gas:           
Southern Company Gas Capital$302
$520
$723
 2.6%2.3%1.4% $490
$1,361
$1,243
Nicor Gas91
123
176
 2.3
2.2
1.1
 278
275
525
Southern Company Gas Total$393
$643
$899
 2.5%2.3%1.4%    
(*)Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2019, 2018, and 2017.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Financing Activities
The following table outlines the Registrants' long-term debt financing activities for the year ended December 31, 2019:
Company
Senior
Note
Issuances
 
Senior Note
Maturities, Redemptions, and Repurchases
 
Revenue
Bond
Issuances and
Reofferings
of Purchased
Bonds
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities(a)
 (in millions)
Southern Company parent$
 $2,400
 $
 $
 $1,725
 $
Alabama Power600
 200
 
 
 
 1
Georgia Power750
 500
 584
 223
 1,218
 13
Mississippi Power
 25
 43
 
 
 
Southern Power
 600
 
 
 
 
Southern Company Gas
 300
 
 
 300
 50
Other
 
 
 25
 
 17
Elimination(b)

 
 
 
 
 (7)
Southern Company$1,350
 $4,025
 $627
 $248
 $3,243
 $74
(a)Includes reductions in finance lease obligations resulting from cash payments under finance leases.
(b)Represents reductions in affiliate finance lease obligations at Georgia Power, which are eliminated in Southern Company's consolidated financial statements.
Except as otherwise described herein, the Registrants used the proceeds of debt issuances for their redemptions and maturities shown in the table above, to repay short-term indebtedness, and for general corporate purposes, including working capital. The Subsidiary Registrants also used the proceeds for their construction programs.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Registrants plan to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Southern Company
During 2019, Southern Company issued approximately 19.5 million shares of common stock through employee equity compensation plans and received proceeds of approximately $844 million.
In addition, in August 2019, Southern Company issued 34.5 million 2019 Series A Equity Units (Equity Units), initially in the form of corporate units (Corporate Units), at a stated amount of $50 per Corporate Unit, for a total stated amount of $1.725 billion. Net proceeds from the issuance were approximately $1.682 billion. Each Corporate Unit is comprised of (i) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019A Remarketable Junior Subordinated Notes due 2024, (ii) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019B Remarketable Junior Subordinated Notes due 2027, and (iii) a stock purchase contract, which obligates the holder to purchase from Southern Company, no later than August 1, 2022, a certain number of shares of Southern Company's common stock for $50 in cash. See Note 8 to the financial statements under "Equity Units" for additional information.
In January 2019, Southern Company repaid a $250 million short-term uncommitted bank credit arrangement and a $1.5 billion short-term floating rate bank loan.
In 2019, Southern Company, through repurchases and redemptions, retired all $1.0 billion aggregate principal amount of its 1.85% Senior Notes due July 1, 2019, $350 million aggregate principal amount of its Series 2014B 2.15% Senior Notes due September 1, 2019, $750 million aggregate principal amount of its Series 2018A Floating Rate Notes due February 14, 2020, and $300 million aggregate principal amount of its Series 2017A Floating Rate Senior Notes due September 30, 2020.
Subsequent to December 31, 2019, Southern Company issued $1.0 billion aggregate principal amount of Series 2020A 4.95% Junior Subordinated Notes due January 30, 2080.
Alabama Power
In February 2019, Alabama Power repaid at maturity $200 million aggregate principal amount of Series Z 5.125% Senior Notes due February 15, 2019.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In September 2019, Alabama Power issued $600 million aggregate principal amount of Series 2019A 3.45% Senior Notes due October 1, 2049.
Subsequent to December 31, 2019, Alabama Power received a capital contribution totaling $610 million from Southern Company.
Georgia Power
In March and December 2019, Georgia Power made borrowings under the multi-advance credit facilities related to the Amended and Restated Loan Guarantee Agreement in an aggregate principal amount of $835 million and $383 million, respectively, with applicable interest rates of 3.213% and 2.537%, respectively, both for an interest period that extends to the final maturity date of February 20, 2044. The proceeds were used to reimburse Georgia Power for Eligible Project Costs relating to the construction of Plant Vogtle Units 3 and 4. See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
In June 2019, Georgia Power entered into two short-term floating rate bank loans in aggregate principal amounts of $125 million each, both of which bear interest based on one-month LIBOR.
In September 2019, Georgia Power issued $400 million aggregate principal amount of Series 2019A 2.20% Senior Notes due September 15, 2024 and $350 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
Subsequent to December 31, 2019, Georgia Power issued $700 million aggregate principal amount of Series 2020A 2.10% Senior Notes due July 30, 2023, $500 million aggregate principal amount of Series 2020B 3.70% Senior Notes due January 30, 2050, and an additional $300 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
During 2019, Georgia Power reoffered to the public the following pollution control revenue bonds that previously had been purchased and were held by Georgia Power at December 31, 2018:
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009;
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013;
$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008;
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994; and
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013.
During 2019, Georgia Power purchased, held, and subsequently reoffered to the public an additional $115 million of pollution control revenue bonds.
In January 2019, Georgia Power redeemed approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In December 2019, Georgia Power repaid at maturity $500 million aggregate principal amount of its Series 2009B 4.25% Senior Notes.
Subsequent to December 31, 2019, Georgia Power received a capital contribution totaling $500 million from Southern Company and announced the redemption of all $500 million aggregate principal amount of its Series 2017C 2.00% Senior Notes due September 8, 2020.
Mississippi Power
In March 2019, Mississippi Power reoffered to the public approximately $43 million of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002, which previously had been purchased and held by Mississippi Power.
In December 2019, Mississippi Power redeemed $25 million aggregate principal amount of its Series 2018A Floating Rate Senior Notes due March 27, 2020.
Southern Power
In May 2019, Southern Power repaid at maturity a $100 million short-term floating rate bank loan.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In December 2019, Southern Power repaid at maturity $600 million aggregate principal amount of its Series 2016D 1.95% Senior Notes.
Also in December 2019, Southern Power entered into a short-term floating rate bank loan in the aggregate principal amount of $100 million, bearing interest based on one-month LIBOR. Subsequent to December 31, 2019, Southern Power repaid the bank loan.
Southern Company Gas
In July 2019, Nicor Gas repaid at maturity $50 million aggregate principal amount of its 4.7% first mortgage bonds.
In August 2019, Southern Company Gas Capital repaid at maturity $300 million aggregate principal amount of its 5.25% Senior Notes.
In August and October 2019, Nicor Gas issued $200 million and $100 million, respectively, aggregate principal amount of first mortgage bonds in a private placement.
Credit Rating Risk
At December 31, 2019, the Registrants did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change of certain Registrants to BBB and/or Baa2 or below. These contracts are primarily for physical electricity and natural gas purchases and sales, fuel purchases, fuel transportation and storage, energy price risk management, transmission, interest rate management, and, for Georgia Power, construction of new generation at Plant Vogtle Units 3 and 4.
The maximum potential collateral requirements under these contracts at December 31, 2019 were as follows:
Credit Ratings
Southern Company(*)
Alabama PowerGeorgia PowerMississippi Power
Southern
Power(*)
Southern Company Gas
 (in millions)
At BBB and/or Baa2$36
$1
$
$
$35
$
At BBB- and/or Baa3472
1
86

385

At BB+ and/or Ba1 or below2,040
322
1,020
267
1,174
18
(*)Excludes amounts related to Plant Mankato, which was sold on January 17, 2020. Southern Power has PPAs that could require collateral, but not accelerated payment, in the event of a downgrade of Southern Power's credit. The PPAs require credit assurances without stating a specific credit rating. The amount of collateral required would depend upon actual losses resulting from a credit downgrade. Southern Power had $104 million of cash collateral posted related to PPA requirements at December 31, 2019.
The potential collateral requirement amounts in the previous table for the traditional electric operating companies and Southern Power include certain agreements that could require collateral in the event that either Alabama Power or Georgia Power has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of the Registrants to access capital markets and would be likely to impact the cost at which they do so.
Mississippi Power and its largest retail customer, Chevron, have agreements under which Mississippi Power continues to provide retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.
On August 1, 2019, Moody's upgraded Mississippi Power's senior unsecured long-term debt rating to Baa2 from Baa3 and maintained the positive rating outlook.
On September 12, 2019, S&P upgraded the senior unsecured long-term debt rating of Alabama Power to A from A-, the long-term issuer rating of Nicor Gas to A from A-, and the senior secured debt rating of Nicor Gas to A+ from A. The ratings outlooks remained negative.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Market Price Risk
The Registrants are exposed to market risks, including commodity price risk, interest rate risk, weather risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the applicable company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the applicable company's policies in areas such as counterparty exposure and risk management practices. Southern Company Gas' wholesale gas operations uses various contracts in its commercial activities that generally meet the definition of derivatives. For the traditional electric operating companies, Southern Power, and Southern Company Gas' other businesses, each company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
Due to cost-based rate regulation and other various cost recovery mechanisms, the traditional electric operating companies and the natural gas distribution utilities that sell natural gas directly to end-use customers continue to have limited exposure to market volatility in interest rates, foreign currency exchange rates, commodity fuel prices, and prices of electricity. The traditional electric operating companies and certain of the natural gas distribution utilities manage fuel-hedging programs implemented per the guidelines of their respective state PSCs or other applicable state regulatory agencies to hedge the impact of market fluctuations in natural gas prices for customers. Mississippi Power also manages wholesale fuel-hedging programs under agreements with its wholesale customers. Because energy from Southern Power's facilities is primarily sold under long-term PPAs with tolling agreements and provisions shifting substantially all of the responsibility for fuel cost to the counterparties, Southern Power's exposure to market volatility in commodity fuel prices and prices of electricity is generally limited. However, Southern Power has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity. To mitigate residual risks relative to movements in electricity prices, the traditional electric operating companies and Southern Power may enter into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases; however, a significant portion of contracts are priced at market.
Certain of Southern Company Gas' non-regulated operations routinely utilize various types of derivative instruments to economically hedge certain commodity price and weather risks inherent in the natural gas industry. These instruments include a variety of exchange-traded and OTC energy contracts, such as forward contracts, futures contracts, options contracts, and swap agreements. Southern Company Gas' gas marketing services and wholesale gas services businesses also actively manage storage positions through a variety of hedging transactions for the purpose of managing exposures arising from changing natural gas prices. These hedging instruments are used to substantially protect economic margins (as spreads between wholesale and retail natural gas prices widen between periods) and thereby minimize exposure to declining operating margins. Some of these economic hedge activities may not qualify, or may not be designated, for hedge accounting treatment.
The Registrants had no material change in market risk exposure for the year ended December 31, 2019 when compared to the year ended December 31, 2018. See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
The Registrants may enter into interest rate derivatives designated as hedges, which are intended to mitigate interest rate volatility related to forecasted debt financings and existing fixed and floating rate obligations. Outstanding interest rate derivatives at December 31, 2019 are as follows:
At December 31, 2019
Southern Company(*)
Georgia
Power
Southern Company
Gas
 (in millions)
Hedges of forecasted debt$700
$500
$200
Hedges of existing debt1,800


Total$2,500
$500
$200
(*)Includes $1.8 billion of hedges of existing debt at the Southern Company parent.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table provides information related to variable interest rate exposure on long-term debt (including amounts due within one year) at December 31, 2019 for the applicable Registrants:
At December 31, 2019
Southern Company(*)
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
 (in millions, except percentages)
Long-term variable interest rate exposure$4,063
$1,079
$550
$308
$525
Weighted average interest rate on long-term variable interest rate exposure2.38%2.35%1.74%2.51%2.46%
Impact on annualized interest expense of 100 basis point change in interest rates$41
$11
$6
$3
$5
(*)Includes $1.5 billion of long-term variable interest rate exposure at the Southern Company parent entity.
Southern Power Company had foreign currency denominated debt of €1.1 billion at December 31, 2019. Southern Power Company has mitigated its exposure to foreign currency exchange rate risk through the use of foreign currency swaps converting all interest and principal payments to fixed-rate U.S. dollars.
The changes in fair value of energy-related derivative contracts for Southern Company and Southern Company Gas for the years ended December 31, 2019 and 2018 are provided in the table below. The fair value of energy-related derivative contracts was not material for the other Registrants.
 
Southern Company(a)
Southern Company Gas(a)
 (in millions)
Contracts outstanding at December 31, 2017, assets (liabilities), net$(163)$(106)
Contracts realized or settled93
66
Current period changes(b)
(131)(127)
Contracts outstanding at December 31, 2018, assets (liabilities), net$(201)$(167)
Contracts realized or settled69
26
Current period changes(b)
105
213
Disposition6

Contracts outstanding at December 31, 2019, assets (liabilities), net$(21)$72
(a)Excludes cash collateral held on deposit in broker margin accounts of $99 million, $277 million, and $193 million at December 31, 2019, 2018, and 2017, respectively, and premium and intrinsic value associated with weather derivatives of $4 million, $8 million, and $11 million at December 31, 2019, 2018, and 2017, respectively.
(b)The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts for natural gas purchased (sold) at December 31, 2019 and 2018 for Southern Company and Southern Company Gas were as follows:
 Southern CompanySouthern Company Gas
 
mmBtu Volume (in millions)
At December 31, 2019:  
Commodity – Natural gas swaps327

Commodity – Natural gas options262
218
Total hedge volume589
218
   
At December 31, 2018:  
Commodity – Natural gas swaps287

Commodity – Natural gas options144
120
Total hedge volume431
120
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas' derivative contracts are comprised of both long and short natural gas positions. A long position is a contract to purchase natural gas, and a short position is a contract to sell natural gas. The volumes presented above for Southern Company Gas represent the net of long natural gas positions of 4.10 billion mmBtu and short natural gas positions of 3.88 billion mmBtu at December 31, 2019 and the net of long natural gas positions of 4.16 billion mmBtu and short natural gas positions of 4.04 billion mmBtu at December 31, 2018.
For the Southern Company system, the weighted average swap contract cost above market prices was approximately $0.28 and $0.12 per mmBtu at December 31, 2019 and 2018, respectively. The change in option fair value is primarily attributable to the volatility of the market and the underlying change in the natural gas price. Substantially all of the traditional electric operating companies' natural gas hedge gains and losses are recovered through their respective fuel cost recovery clauses.
At December 31, 2019 and 2018, substantially all of the traditional electric operating companies' and certain of the natural gas distribution utilities' energy-related derivative contracts were designated as regulatory hedges and were related to the applicable company's fuel-hedging program. Gains and losses associated with regulatory hedges are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense/cost of natural gas as they are recovered through their respective cost recovery clause. Gains and losses on energy-related derivatives designated as cash flow hedges, which are used to hedge anticipated purchases and sales, are initially deferred in AOCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred. See Note 14 to the financial statements for additional information.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric and natural gas industries. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
The Registrants use over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. In addition, Southern Company Gas uses exchange-traded market-observable contracts, which are categorized as Level 1, and contracts that include a combination of observable and unobservable components, which are categorized as Level 3. See Note 13 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts for Southern Company and Southern Company Gas at December 31, 2019 were as follows:
 Fair Value Measurements of Contracts at
 December 31, 2019
 
Total
Fair Value
 Maturity
  Year 1 Years 2&3 Years 4&5
 (in millions)
Southern Company       
Level 1(a)
$(53) $(19) $(37) $3
Level 2(b)
18
 42
 (25) 1
Level 314
 10
 1
 3
Southern Company total(c)
$(21) $33
 $(61) $7
        
Southern Company Gas       
Level 1(a)
$(53) $(19) $(37) $3
Level 2(b)
111
 98
 11
 2
Level 314
 10
 1
 3
Southern Company Gas total(c)
$72
 $89
 $(25) $8
(a)Valued using NYMEX futures prices.
(b)Level 2 amounts for Southern Company Gas are valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers.
(c)Excludes cash collateral of $99 million as well as premium and associated intrinsic value associated with weather derivatives of $4 million at December 31, 2019.
The Registrants are exposed to risk in the event of nonperformance by counterparties to energy-related and interest rate derivative contracts, as applicable. The Registrants only enter into agreements and material transactions with counterparties that have
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Registrants do not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements.
Southern Company performs periodic reviews of its leveraged lease transactions, both domestic and international, and the creditworthiness of the lessees, including a review of the value of the underlying leased assets and the credit ratings of the lessees. Southern Company's domestic lease transactions generally do not have any credit enhancement mechanisms; however, the lessees in its international lease transactions have pledged various deposits as additional security to secure the obligations. The lessees in Southern Company's international lease transactions are also required to provide additional collateral in the event of a credit downgrade below a certain level. See Notes 1 and 3 to the financial statements under "Leveraged Leases" and "Other MattersSouthern Company," respectively, for additional information.
Southern Company Gas Value at Risk (VaR)
VaR is the maximum potential loss in portfolio value over a specified time period that is not expected to be exceeded within a given degree of probability. Southern Company Gas' VaR may not be comparable to that of other companies due to differences in the factors used to calculate VaR. Southern Company Gas' VaR is determined on a 95% confidence interval and a one-day holding period, which means that 95% of the time, the risk of loss in a day from a portfolio of positions is expected to be less than or equal to the amount of VaR calculated. The open exposure of Southern Company Gas is managed in accordance with established policies that limit market risk and require daily reporting of potential financial exposure to senior management. Because Southern Company Gas generally manages physical gas assets and economically protects its positions by hedging in the futures markets, Southern Company Gas' open exposure is generally mitigated. Southern Company Gas employs daily risk testing, using both VaR and stress testing, to evaluate the risk of its positions.
Southern Company Gas actively monitors open commodity positions and the resulting VaR and maintains a relatively small risk exposure as total buy volume is close to sell volume, with minimal open natural gas price risk. Based on a 95% confidence interval and employing a one-day holding period, SouthStar's portfolio of positions for all periods presented was immaterial.
Southern Company Gas' wholesale gas services segment had the following VaRs at December 31:
 201920182017
 (in millions)
Period end(*)
$2.6
$6.4
$4.8
Average3.4
3.7
2.0
High(*)
7.0
11.7
4.8
Low2.1
1.2
1.0
(*)The increase in VaR at December 31, 2018 reflects significant natural gas price increases in Sequent's key markets driven by an industry-wide lower-than-normal natural gas storage inventory position and colder-than-normal weather in the middle of fourth quarter 2018. As weather and natural gas prices moderated subsequent to December 31, 2018, VaR reduced.
Credit Risk
Southern Company (except as discussed herein), the traditional electric operating companies, and Southern Power are not exposed to any concentrations of credit risk. Southern Company Gas' exposure to concentrations of credit risk is discussed herein.
Southern Company Gas
Gas Distribution Operations
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 16 Marketers in Georgia. The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of two times a Marketer's highest month's estimated bill from Atlanta Gas Light. For 2019, the four largest Marketers based on customer count, which includes SouthStar, accounted for 21% of Southern Company Gas' adjusted operating margin and 27% of adjusted operating margin for Southern Company Gas' gas distribution operations segment.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Several factors are designed to mitigate Southern Company Gas' risks from the increased concentration of credit that has resulted from deregulation. In addition to the security support described above, Atlanta Gas Light bills intrastate delivery service to Marketers in advance rather than in arrears. Atlanta Gas Light accepts credit support in the form of cash deposits, letters of credit/surety bonds from acceptable issuers, and corporate guarantees from investment-grade entities. Southern Company Gas reviews the adequacy of credit support coverage, credit rating profiles of credit support providers, and payment status of each Marketer. Southern Company Gas believes that adequate policies and procedures are in place to properly quantify, manage, and report on Atlanta Gas Light's credit risk exposure to Marketers.
Atlanta Gas Light also faces potential credit risk in connection with assignments of interstate pipeline transportation and storage capacity to Marketers. Although Atlanta Gas Light assigns this capacity to Marketers, in the event that a Marketer fails to pay the interstate pipelines for the capacity, the interstate pipelines would likely seek repayment from Atlanta Gas Light.
Wholesale Gas Services
Southern Company Gas has established credit policies to determine and monitor the creditworthiness of counterparties, as well as the quality of pledged collateral. Southern Company Gas also utilizes netting agreements whenever possible to mitigate exposure to counterparty credit risk. When Southern Company Gas is engaged in more than one outstanding derivative transaction with the same counterparty and also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Netting agreements enable Southern Company Gas to net certain assets and liabilities by counterparty. Southern Company Gas also nets across product lines and against cash collateral, provided the netting and cash collateral agreements include such provisions.
Southern Company Gas may require counterparties to pledge additional collateral when deemed necessary. Southern Company Gas conducts credit evaluations and obtains appropriate internal approvals for a counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, Southern Company Gas requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
Certain of Southern Company Gas' derivative instruments contain credit-risk-related or other contingent features that could increase the payments for collateral it posts in the normal course of business when its financial instruments are in net liability positions. At December 31, 2019, for agreements with such features, Southern Company Gas' derivative instruments with liability fair values were immaterial and Southern Company Gas had no collateral posted with derivatives counterparties to satisfy these arrangements.
Southern Company Gas has a concentration of credit risk as measured by its 30-day receivable exposure plus forward exposure. At December 31, 2019, the top 20 counterparties of Southern Company Gas' wholesale gas services segment represented approximately 59%, or $218 million, of its total counterparty exposure and had a weighted average S&P equivalent credit rating of A-, all of which is consistent with the prior year. The S&P equivalent credit rating is determined by a process of converting the lower of the S&P or Moody's ratings to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being D / Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of the financial ratios of that counterparty. To arrive at the weighted average credit rating, each counterparty is assigned an internal ratio, which is multiplied by their credit exposure and summed for all counterparties. The sum is divided by the aggregate total counterparties' exposures, and this numeric value is then converted to a S&P equivalent.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table provides credit risk information related to Southern Company Gas' third-party natural gas contracts receivable and payable positions at December 31:
 Gross Receivables Gross Payables
 2019 2018 2019 2018
 (in millions) (in millions)
Netting agreements in place:       
Counterparty is investment grade$238
 $461
 $127
 $255
Counterparty is non-investment grade1
 5
 43
 95
Counterparty has no external rating175
 314
 272
 505
No netting agreements in place:       
Counterparty is investment grade14
 19
 
 1
Counterparty has no external rating
 2
 
 
Amount recorded in balance sheets$428
 $801
 $442
 $856
Gas Marketing Services
Southern Company Gas obtains credit scores for its firm residential and small commercial customers using a national credit reporting agency, enrolling only those customers that meet or exceed Southern Company Gas' credit threshold. Southern Company Gas considers potential interruptible and large commercial customers based on reviews of publicly available financial statements and commercially available credit reports. Prior to entering into a physical transaction, Southern Company Gas also assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements.
Capital Requirements
Total estimated capital expenditures for the Registrants through 2024 based on their current construction programs are as follows:
 20202021202220232024
 (in billions)
Southern Company(a)(b)(c)(d)
$8.7
$7.3
$6.8
$6.8
$6.2
Alabama Power(b)
2.1
1.8
1.8
1.8
1.6
Georgia Power(c)
4.1
3.4
3.0
2.8
2.7
Mississippi Power0.3
0.2
0.2
0.3
0.2
Southern Power(d)
0.3
0.2
0.1
0.1
0.1
Southern Company Gas1.8
1.6
1.6
1.7
1.6
(a)Includes the Subsidiary Registrants, as well the other subsidiaries.
(b)
Includes amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $0.5 billion for 2020, $0.2 billion for 2021, $0.3 billion for 2022, and $0.1 billion for 2023. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerPetition for Certificate of Convenience and Necessity" herein for additional information.
(c)These amounts include expenditures of approximately $1.6 billion, $0.9 billion, and $0.3 billion for the construction of Plant Vogtle Units 3 and 4 in 2020, 2021, and 2022, respectively.
(d)These amounts do not include approximately $0.5 billion per year for 2020 through 2024 for Southern Power's planned expenditures for plant acquisitions and placeholder growth, which may vary materially due to market opportunities and Southern Power's ability to execute its growth strategy.
These amounts include estimated capital expenditures to comply with environmental laws and regulations, but do not include any potential compliance costs associated with pending regulation of CO2 emissions from fossil fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters" herein for additional information. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel (for Southern Company, Alabama Power, and Georgia Power) and capital expenditures covered under LTSAs.
The traditional electric operating companies also anticipate costs associated with closure and monitoring of ash ponds and landfills in accordance with the CCR Rule and the related state rules, which are reflected in the applicable Registrants' ARO liabilities. Alabama Power's cost estimates are based on closure-in-place for all of its ash ponds. The cost estimates for Georgia
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Power and Mississippi Power are based on a combination of closure-in-place for some ash ponds and closure by removal for others. These anticipated costs are likely to change, and could change materially, as assumptions and details pertaining to closure are refined and compliance activities continue. See FUTURE EARNINGS POTENTIAL – "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" herein and Note 6 to the financial statements for additional information. The current estimates of these costs through 2024 are as follows:
 20202021202220232024
 (in millions)
Southern Company$498
$551
$742
$916
$967
Alabama Power200
217
284
363
386
Georgia Power265
289
391
475
530
Mississippi Power23
29
24
23
20
The construction programs are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental laws and regulations; the outcome of any legal challenges to environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; abnormal weather; delays in construction due to judicial or regulatory action; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. Additionally, Southern Power's planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy. See Note 15 to the financial statements under "Southern Power" for additional information regarding Southern Power's plant acquisitions and construction projects.
The construction program of Georgia Power also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for information regarding Plant Vogtle Units 3 and 4 and additional factors that may impact construction expenditures.
See FUTURE EARNINGS POTENTIAL – "Construction Programs" herein for additional information. Also see "Contractual Obligations" herein for information regarding other future funding requirements of the Registrants.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Contractual Obligations
The following tables present the Registrants' contractual obligations at December 31, 2019. Additional information about these funding requirements is provided herein.
Southern Company2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$2,971
 $5,189
 $2,890
 $33,489
 $44,539
Interest1,677
 3,109
 2,809
 25,986
 33,581
Financial derivative obligations450
 204
 65
 
 719
Operating leases294
 543
 386
 1,609
 2,832
Finance leases31
 47
 33
 246
 357
Pipeline charges, storage capacity, and gas supply725
 1,085
 784
 1,677
 4,271
Purchase commitments –        

Capital7,758
 12,981
 11,989
   32,728
Fuel2,787
 3,491
 1,527
 4,546
 12,351
Purchased power150
 270
 237
 1,725
 2,382
Other406
 618
 530
 2,174
 3,728
ARO settlements498
 1,293
 1,883
   3,674
Other(*)
163
 310
 38
 65
 576
Southern Company system total$17,910
 $29,140
 $23,171
 $71,517
 $141,738
(*)Includes funding requirements related to pension and other postretirement benefit plans, nuclear decommissioning trusts of Georgia Power, and preferred stock dividends of Alabama Power.
Alabama Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$250
 $1,060
 $321
 $6,956
 $8,587
Interest338
 649
 578
 4,985
 6,550
Preferred stock dividends15
 29
 29
 
 73
Financial derivative obligations14
 10
 
 
 24
Operating leases54
 105
 5
 1
 165
Finance leases1
 2
 1
 
 4
Purchase commitments –         
Capital1,502
 2,891
 2,927
   7,320
Fuel959
 1,226
 465
 808
 3,458
Purchased power35
 75
 77
 446
 633
Other39
 81
 62
 243
 425
ARO settlements200
 501
 749
   1,450
Pension and other postretirement benefit plans14
 28
     42
Alabama Power total$3,421
 $6,657
 $5,214
 $13,439
 $28,731
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Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$1,014
 $906
 $628
 $9,236
 $11,784
Interest384
 715
 668
 5,070
 6,837
Financial derivative obligations49
 21
 
 
 70
Operating leases205
 395
 359
 831
 1,790
Finance leases28
 49
 50
 134
 261
Purchase commitments –         
Capital3,805
 6,080
 4,966
   14,851
Fuel1,091
 1,401
 629
 3,610
 6,731
Purchased power56
 117
 123
 862
 1,158
Other117
 121
 133
 205
 576
ARO settlements265
 680
 1,006
   1,951
Nuclear decommissioning trust5
 9
 9
 65
 88
Pension and other postretirement benefit plans50
 93
     143
Georgia Power total$7,069
 $10,587
 $8,571
 $20,013
 $46,240
Mississippi Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$282
 $270
 $
 $1,026
 $1,578
Interest68
 102
 83
 542
 795
Financial derivative obligations15
 11
 1
 
 27
Operating leases2
 2
 1
 2
 7
Purchase commitments –         
Capital255
 397
 402
   1,054
Fuel313
 312
 169
 108
 902
Purchased power17
 36
 37
 417
 507
Other28
 58
 69
 230
 385
ARO settlements23
 53
 44
   120
Pension and other postretirement benefits plans7
 14
     21
Mississippi Power total$1,010
 $1,255
 $806
 $2,325
 $5,396
Southern Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$825
 $977
 $290
 $2,339
 $4,431
Interest163
 278
 222
 1,302
 1,965
Financial derivative obligations3
 
 
 
 3
Operating leases29
 50
 52
 888
 1,019
Purchase commitments –         
Capital251
 306
 294
   851
Fuel424
 552
 265
 20
 1,261
Purchased power42
 42
 
 
 84
Other159
 296
 239
 1,481
 2,175
Southern Power total$1,896
 $2,501
 $1,362
 $6,030
 $11,789
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$
 $376
 $400
 $4,659
 $5,435
Interest235
 458
 425
 3,213
 4,331
Financial derivative obligations369
 161
 66
 
 596
Operating leases18
 31
 21
 44
 114
Pipeline charges, storage capacity, and gas supply725
 1,085
 784
 1,677
 4,271
Purchase commitments –        

Capital1,775
 3,191
 3,335
   8,301
Other31
 14
 1
 
 46
Pension and other postretirement benefit plans16
 29
     45
Southern Company Gas total$3,169
 $5,345
 $5,032
 $9,593
 $23,139
Additional information about these funding requirements is provided below:
Long-term debt – Represents scheduled maturities of long-term debt, as well as the related interest. All amounts are reflected based on final maturity dates except for amounts related to Georgia Power's FFB borrowings. The final maturity date for Georgia Power's FFB borrowings is February 20, 2044; however, principal amortization is reflected beginning in February 2020. The interest amounts also include the effects of interest rate derivatives employed to manage interest rate risk and effects of foreign currency swaps employed to manage foreign currency exchange rate risk, as applicable. For Southern Company and Southern Power, debt principal includes a $5 million loss related to Southern Power's foreign currency hedge of €1.1 billion. The Registrants plan to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at December 31, 2019, as reflected in the statements of capitalization for each Registrant. Long-term debt excludes finance lease amounts, which are shown separately. See Note 8 to the financial statements for additional information.
Financial derivative obligations – See Note 14 to the financial statements for additional information.
Operating and finance leases – See Note 9 to the financial statements for additional information. Operating lease commitments may include certain land leases for facilities that may be subject to annual price escalation based on indices. Estimated lease payments for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $1 million for 2021, $2 million for 2022, $3 million for 2023, $4 million for 2024, and $85 million for after 2024. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information.
Purchase commitments – Capital – Estimated capital expenditures are provided for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel, capital expenditures covered under LTSAs, and estimated capital expenditures for AROs, which are reflected in the "fuel," "other," and "ARO settlements" categories, respectively, where applicable. Estimated capital expenditures for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $0.5 billion for 2020, $0.2 billion for 2021, $0.3 billion for 2022, and $0.1 billion for 2023. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information. Estimated capital expenditures for Southern Company and Southern Power exclude approximately $0.5 billion per year for 2020 through 2024 for Southern Power's planned expenditures for plant acquisitions and placeholder growth. At December 31, 2019, significant purchase commitments were outstanding in connection with the Registrants' construction programs. See FUTURE EARNINGS POTENTIAL ��� "Environmental Matters" and "Construction Programs" herein and "Capital Requirements" herein for additional information.
Purchase commitments – Fuel – Primarily includes commitments to purchase coal (for the traditional electric operating companies), natural gas (for the traditional electric operating companies and Southern Power), and nuclear fuel (for Alabama Power and Georgia Power), as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the NYMEX future prices at December 31, 2019.
Purchase commitments – Purchased power – Represents estimated minimum obligations for various PPAs for the purchase of capacity and energy, as well as, for Georgia Power, capacity payments related to Plant Vogtle Units 1 and 2. Amounts exclude PPAs accounted for as leases, which are reflected in the "operating leases" and "finance leases" categories, where applicable.
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COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Estimated capacity payments for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $4 million for 2020, $7 million for 2021, $7 million for 2022, $8 million for 2023, $8 million for 2024, and $107 million for after 2024. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information. Mississippi Power's long-term PPAs are associated with solar facilities and only include an energy component. Southern Power's purchased power commitments will be resold under a third-party agreement at cost. See Note 3 to the financial statements under "Guarantees" for additional information.
Purchase commitments – Other – Includes LTSAs (for all Registrants), contracts for the procurement of limestone (for Alabama Power and Georgia Power), contractual environmental remediation liabilities (for Southern Company Gas), operation and maintenance agreements (for Southern Power), and transmission agreements (for Southern Power). LTSAs include price escalation based on inflation indices. Southern Power's transmission commitments are based on the Southern Company system's current tariff rate for point-to-point transmission.
Pension and other postretirement benefit plans – The Southern Company system provides postretirement benefits to the majority of its employees and funds trusts to the extent required by PSCs, other applicable state regulatory agencies, or the FERC. The Registrants forecast contributions to their pension and other postretirement benefit plans over a three-year period. The Registrants anticipate no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from corporate assets of the applicable subsidiaries. See Note 11 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from corporate assets of the applicable subsidiaries.
ARO settlements – Represents estimated costs for a five-year period associated with closing and monitoring ash ponds at the traditional electric operating companies in accordance with the CCR Rule and the related state rules, which are reflected in the applicable Registrants' ARO liabilities. Material expenditures in future years for ARO settlements also will be required for ash ponds, nuclear decommissioning (for Alabama Power and Georgia Power), and other liabilities reflected in the applicable Registrants' AROs. See Note 6 to the financial statements for additional information.
Preferred stock dividends – Represents preferred stock of Alabama Power. Preferred stock does not mature; therefore, amounts are provided for the next five years only.
Nuclear decommissioning trusts – As a result of NRC requirements, Alabama Power and Georgia Power have external trust funds for nuclear decommissioning costs. Based on its most recent site study completed in 2018, Alabama Power currently has no additional funding requirements. Alabama Power's next site study is expected to be conducted by 2023. Georgia Power's projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2019 ARP. See Note 6 to the financial statements under "Nuclear Decommissioning" for additional information.
Pipeline charges, storage capacity, and gas supply – Includes charges at Southern Company Gas recoverable through a natural gas cost recovery mechanism, or alternatively billed to Marketers selling retail natural gas, and demand charges associated with Sequent. The gas supply balance includes amounts for Nicor Gas and SouthStar gas commodity purchase commitments of 45 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2019 and valued at $84 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries, including SouthStar, in support of payment obligations.
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Item 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
INDEX TO 2019 FINANCIAL STATEMENTS
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). We also have audited Southern Company's internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).
In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of Southern Company as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America. Also, in our opinion, Southern Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by COSO.
Basis for Opinions
Southern Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on these financial statements and an opinion on Southern Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.
Definition and Limitations of Internal Control over Financial Reporting
A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
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Critical Audit Matters
The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the Audit Committee of Southern Company's Board of Directors and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.
Impact of Rate Regulation on the Financial Statements – Refer to Note 1 (Summary of Significant Accounting Policies – Regulatory Assets and Liabilities) and Note 2 (Regulatory Matters) to the financial statements
Critical Audit Matter Description
Southern Company's traditional electric operating companies and natural gas distribution utilities (the "regulated utility subsidiaries"), which represent approximately 87% of Southern Company's consolidated operating revenues for the year ended December 31, 2019 and 84% of its consolidated total assets at December 31, 2019, are subject to rate regulation by their respective state Public Service Commissions or other applicable state regulatory agencies and wholesale regulation by the Federal Energy Regulatory Commission (the "Commissions"). Management has determined that the regulated utility subsidiaries meet the requirements under accounting principles generally accepted in the United States of America to utilize specialized rules to account for the effects of rate regulation in the preparation of its financial statements. Accounting for the economics of rate regulation impacts multiple financial statement line items and disclosures, including, but not limited to, property, plant, and equipment; other regulatory assets; other regulatory liabilities; other cost of removal obligations; deferred charges and credits related to income taxes; under and over recovered regulatory clause revenues; operating revenues; operations and maintenance expenses; and depreciation.
The Commissions set the rates the regulated utility subsidiaries are permitted to charge customers based on allowable costs, including a reasonable return on equity. Rates are determined and approved in regulatory proceedings based on an analysis of the applicable regulated subsidiary's costs to provide utility service and a return on, and recovery of, its investment in the utility business. Current and future regulatory decisions can have an impact on the recovery of costs, the rate of return earned on investments, and the timing and amount of assets to be recovered by rates. The Commissions' regulation of rates is premised on the full recovery of prudently incurred costs and a reasonable rate of return on invested capital. While Southern Company's regulated utility subsidiaries expect to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve: (1) full recovery of the costs of providing utility service, or (2) full recovery of all amounts invested in the utility business and a reasonable return on that investment.
We identified the impact of rate regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impacted account balances and disclosures (e.g., asset retirement costs, property damage reserves, and net book value of retired assets) and the high degree of subjectivity involved in assessing the potential impact of future regulatory orders on the financial statements. Management judgments include assessing the likelihood of (1) recovery in future rates of incurred costs, (2) a disallowance of part of the cost of recently completed plant or plant under construction, and/or (3) a refund to customers. Given that management's accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments required specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities and significant auditor judgment to evaluate management estimates and the subjectivity of audit evidence.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:
We tested the effectiveness of management's controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We also tested the effectiveness of management's controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates or of a future reduction in rates.
We read relevant regulatory orders issued by the Commissions for the regulated utility subsidiaries, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future reduction in rates based on precedence of the Commissions' treatment of similar costs under similar circumstances. We evaluated the external information and compared it to management's recorded regulatory asset and liability balances for completeness.
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For regulatory matters in process, we inspected filings with the Commissions by both Southern Company's regulated utility subsidiaries and other interested parties that may impact the regulated utility subsidiaries' future rates for any evidence that might contradict management's assertions.
We evaluated regulatory filings for any evidence that intervenors are challenging full recovery of the cost of any capital projects. We tested selected costs included in the capitalized project costs for completeness and accuracy.
We obtained representation from management regarding probability of recovery for regulatory assets or refund or future reduction in rates for regulatory liabilities to assess management's assertion that amounts are probable of recovery, refund, or a future reduction in rates.
We evaluated Southern Company's disclosures related to the impacts of rate regulation, including the balances recorded and regulatory developments.
Disclosure of Uncertainties – Plant Vogtle Units 3 and 4 Construction – Refer to Note 2 (Regulatory Matters – Georgia Power – Nuclear Construction) to the financial statements
Critical Audit Matter Description
As discussed in Note 2 to the financial statements, the ultimate recovery of Georgia Power Company's (Georgia Power) investment in the construction of Plant Vogtle Units 3 and 4 is subject to multiple uncertainties. Such uncertainties include the potential impact of future decisions by Georgia Power's regulators (particularly the Georgia Public Service Commission), actions by the co-owners of the Vogtle project, and litigation or other legal proceedings involving the project. In addition, Georgia Power's ability to meet its cost and schedule forecasts could impact its capacity to fully recover its investment in the project. While the project is not subject to a cost cap, Georgia Power's cost and schedule forecasts are subject to numerous uncertainties which could impact cost recovery, including challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues that could arise and change the projected schedule and estimated cost. The ultimate recovery of Georgia Power's investment in Plant Vogtle Units 3 and 4 is subject to the outcome of future assessments by management as well as Georgia Public Service Commission decisions in future regulatory proceedings.
Management has disclosed the status, risks, and uncertainties associated with Plant Vogtle Units 3 and 4, including (1) the status of construction; (2) challenges to the achievement of Georgia Power's cost and schedule forecasts; (3) the status of regulatory proceedings; (4) the status of legal actions or issues involving the co-owners of the project; and (5) other matters which could impact the ultimate recoverability of Georgia Power's investment in the project. We identified as a critical audit matter the evaluation of these disclosures which involved significant audit effort requiring specialized industry and construction expertise, extensive knowledge of rate regulation, and difficult and subjective judgments.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the disclosure of the status, risks, and uncertainties of the nuclear construction at Plant Vogtle Units 3 and 4 included the following, among others:
We tested the effectiveness of internal controls over the on-going evaluation and monitoring of the construction schedule and capital cost forecast and over the disclosure of matters related to the construction and ultimate cost recovery of Plant Vogtle Units 3 and 4.
We involved construction specialists to assist in our evaluation of Georgia Power's processes for on-going evaluation and monitoring of the construction schedule and cost forecast and to assess the disclosures of challenges to the achievement of such forecasts.
We attended meetings with Georgia Power and Southern Company officials, project managers (including contractors), independent regulatory monitors, and co-owners of the project to evaluate and monitor construction status and identify cost and schedule challenges.
We read reports of external independent monitors employed by the Georgia Public Service Commission to monitor the status of construction at Plant Vogtle Units 3 and 4 to evaluate the completeness of Georgia Power's disclosure of challenges to the achievement of cost and schedule forecasts.
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We inquired of Georgia Power and Southern Company officials and project managers regarding the status of construction, the construction schedule, and cost forecasts to assess the financial statement disclosures with respect to project status and potential risks and uncertainties to the achievement of such forecasts.
We inspected regulatory filings and transcripts of Georgia Public Service Commission hearings regarding the construction of Plant Vogtle Units 3 and 4 to identify potential challenges to the recovery of Georgia Power's construction costs and to evaluate the disclosures with respect to such uncertainties.
We inquired of Georgia Power and Southern Company management and internal and external legal counsel regarding any potential legal actions or issues arising from project construction or issues involving the co-owners of the project.
We compared the financial statement disclosures relating to this matter to the information gathered through the conduct of all our procedures to evaluate whether there were omissions relating to significant facts or uncertainties regarding the status of construction or other factors which could impact the ultimate cost recovery of Plant Vogtle Units 3 and 4.
We obtained representation from management regarding disclosure of all matters related to the cost and/or status, including matters related to a co-owner or regulatory development, that could result in a potential disallowance of costs related to the construction of Plant Vogtle Units 3 and 4.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company's auditor since 2002.
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CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report

 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail electric revenues$14,084
 $15,222
 $15,330
Wholesale electric revenues2,152
 2,516
 2,426
Other electric revenues636
 664
 681
Natural gas revenues3,792
 3,854
 3,791
Other revenues755
 1,239
 803
Total operating revenues21,419
 23,495
 23,031
Operating Expenses:     
Fuel3,622
 4,637
 4,400
Purchased power816
 971
 863
Cost of natural gas1,319
 1,539
 1,601
Cost of other sales435
 806
 513
Other operations and maintenance5,600
 5,889
 5,739
Depreciation and amortization3,038
 3,131
 3,010
Taxes other than income taxes1,230
 1,315
 1,250
Estimated loss on plants under construction24
 1,097
 3,362
Impairment charges168
 210
 
(Gain) loss on dispositions, net(2,569) (291) (40)
Total operating expenses13,683
 19,304
 20,698
Operating Income7,736
 4,191
 2,333
Other Income and (Expense):     
Allowance for equity funds used during construction128
 138
 160
Earnings from equity method investments162
 148
 106
Interest expense, net of amounts capitalized(1,736) (1,842) (1,694)
Other income (expense), net252
 114
 163
Total other income and (expense)(1,194) (1,442) (1,265)
Earnings Before Income Taxes6,542
 2,749
 1,068
Income taxes1,798
 449
 142
Consolidated Net Income4,744
 2,300
 926
Dividends on preferred and preference stock of subsidiaries15
 16
 38
Net income (loss) attributable to noncontrolling interests(10) 58
 46
Consolidated Net Income Attributable to Southern Company$4,739
 $2,226
 $842
Common Stock Data:     
Earnings per share —     
Basic$4.53
 $2.18
 $0.84
Diluted4.50
 2.17
 0.84
Average number of shares of common stock outstanding — (in millions)     
Basic1,046
 1,020
 1,000
Diluted1,054
 1,025
 1,008
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Consolidated Net Income$4,744
 $2,300
 $926
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(39), $(16), and $34, respectively(115) (47) 57
Reclassification adjustment for amounts included in net income,
net of tax of $19, $24, and $(37), respectively
57
 72
 (60)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(31), $(2), and $6, respectively(64) (5) 17
Reclassification adjustment for amounts included in net income,
net of tax of $1, $5, and $(6), respectively
4
 6
 (23)
Total other comprehensive income (loss)(118) 26
 (9)
Dividends on preferred and preference stock of subsidiaries15
 16
 38
Comprehensive income (loss) attributable to noncontrolling interests(10) 58
 46
Consolidated Comprehensive Income Attributable to Southern Company$4,621
 $2,252
 $833
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Consolidated net income$4,744
 $2,300
 $926
Adjustments to reconcile consolidated net income
to net cash provided from operating activities —
     
Depreciation and amortization, total3,331
 3,549
 3,457
Deferred income taxes611
 89
 166
Utilization of federal investment tax credits757
 5
 
Allowance for equity funds used during construction(128) (138) (160)
Pension, postretirement, and other employee benefits(204) (103) (84)
Pension and postretirement funding(1,136) (4) (2)
Settlement of asset retirement obligations(328) (244) (177)
Storm damage reserve accruals168
 74
 38
Stock based compensation expense107
 125
 109
Estimated loss on plants under construction15
 1,093
 3,179
Impairment charges168
 210
 
(Gain) loss on dispositions, net(2,588) (301) (42)
Other, net102
 14
 (63)
Changes in certain current assets and liabilities —     
-Receivables630
 (426) (202)
-Fossil fuel for generation(120) 123
 36
-Natural gas for sale44
 49
 36
-Other current assets70
 (127) (143)
-Accounts payable(693) 291
 (280)
-Accrued taxes117
 267
 (142)
-Accrued compensation(9) 33
 (8)
-Retail fuel cost over recovery62
 36
 (212)
-Other current liabilities61
 30
 (38)
Net cash provided from operating activities5,781
 6,945
 6,394
Investing Activities:     
Business acquisitions, net of cash acquired(50) (65) (1,054)
Property additions(7,555) (8,001) (7,423)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion               
 
 1,682
Nuclear decommissioning trust fund purchases(888) (1,117) (811)
Nuclear decommissioning trust fund sales882
 1,111
 805
Proceeds from dispositions and asset sales5,122
 2,956
 97
Cost of removal, net of salvage(393) (388) (313)
Change in construction payables, net(169) 50
 259
Investments in unconsolidated subsidiaries(148) (114) (152)
Payments pursuant to LTSAs(234) (186) (227)
Other investing activities41
 (6) (53)
Net cash used for investing activities(3,392) (5,760) (7,190)
Financing Activities:     
Increase (decrease) in notes payable, net640
 (774) (401)
Proceeds —     
Long-term debt5,220
 2,478
 5,858
Common stock844
 1,090
 793
Preferred stock
 
 250
Short-term borrowings350
 3,150
 1,259
Redemptions and repurchases —     
Long-term debt(4,347) (5,533) (2,930)
Preferred and preference stock
 (33) (658)
Short-term borrowings(1,850) (1,900) (659)
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Payment of common stock dividends(2,570) (2,425) (2,300)
Other financing activities(157) (264) (222)
Net cash provided from (used for) financing activities(1,930) (1,813) 951
Net Change in Cash, Cash Equivalents, and Restricted Cash459
 (628) 155
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year1,519
 2,147
 1,992
Cash, Cash Equivalents, and Restricted Cash at End of Year$1,978
 $1,519
 $2,147
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $74, $72, and $89 capitalized, respectively)$1,651
 $1,794
 $1,676
Income taxes (net of refunds)276
 172
 (410)
Noncash transactions — Accrued property additions at year-end932
 1,103
 985
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$1,975
 $1,396
Receivables —   
Customer accounts receivable1,614
 1,726
Energy marketing receivable428
 801
Unbilled revenues599
 654
Under recovered fuel clause revenues
 115
Other accounts and notes receivable817
 813
Accumulated provision for uncollectible accounts(49) (50)
Materials and supplies1,388
 1,465
Fossil fuel for generation521
 405
Natural gas for sale479
 524
Prepaid expenses314
 432
Assets from risk management activities, net of collateral183
 222
Regulatory assets – asset retirement obligations287
 
Other regulatory assets885
 525
Assets held for sale188
 393
Other current assets188
 162
Total current assets9,817
 9,583
Property, Plant, and Equipment:   
In service105,114
 103,706
Less: Accumulated depreciation30,765
 31,038
Plant in service, net of depreciation74,349
 72,668
Nuclear fuel, at amortized cost851
 875
Construction work in progress7,880
 7,254
Total property, plant, and equipment83,080
 80,797
Other Property and Investments:   
Goodwill5,280

5,315
Equity investments in unconsolidated subsidiaries1,303

1,580
Other intangible assets, net of amortization of $280 and $235
at December 31, 2019 and December 31, 2018, respectively
536
 613
Nuclear decommissioning trusts, at fair value2,036
 1,721
Leveraged leases788
 798
Miscellaneous property and investments391
 269
Total other property and investments10,334
 10,296
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization1,800
 
Deferred charges related to income taxes798
 794
Unamortized loss on reacquired debt300
 323
Regulatory assets – asset retirement obligations, deferred4,094
 2,933
Other regulatory assets, deferred6,805
 5,375
Assets held for sale, deferred601
 5,350
Other deferred charges and assets1,071
 1,463
Total deferred charges and other assets15,469
 16,238
Total Assets$118,700
 $116,914
The accompanying notes are an integral part of these consolidated financial statements.
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CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$2,989
 $3,198
Notes payable2,055
 2,915
Energy marketing trade payables442
 856
Accounts payable2,115
 2,580
Customer deposits496
 522
Accrued taxes —   
Accrued income taxes
 21
Other accrued taxes659
 635
Accrued interest474
 472
Accrued compensation992
 1,030
Asset retirement obligations504
 404
Other regulatory liabilities756
 376
Liabilities held for sale5
 425
Operating lease obligations229
 
Other current liabilities830
 852
Total current liabilities12,546
 14,286
Long-Term Debt (See accompanying statements)
41,798
 40,736
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes7,888
 6,558
Deferred credits related to income taxes6,078
 6,460
Accumulated deferred ITCs2,291
 2,372
Employee benefit obligations1,814
 2,147
Operating lease obligations, deferred1,615
 
Asset retirement obligations, deferred9,282
 8,990
Accrued environmental remediation234
 268
Other cost of removal obligations2,239
 2,297
Other regulatory liabilities, deferred256
 169
Liabilities held for sale, deferred
 2,836
Other deferred credits and liabilities609
 465
Total deferred credits and other liabilities32,306
 32,562
Total Liabilities86,650
 87,584
Redeemable Preferred Stock of Subsidiaries (See accompanying statements)
291
 291
Total Stockholders' Equity (See accompanying statements)
31,759
 29,039
Total Liabilities and Stockholders' Equity$118,700
 $116,914
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.
Table of ContentsIndex to Financial Statements

CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term debt payable to affiliated trusts —     
Variable rate due 20425.20%$206
$206
  
Long-term senior notes and debt —     
Maturity     
2019
2,948
  
20202.43%2,100
2,271
  
20212.70%2,672
2,638
  
20222.53%1,870
1,983
  
20233.05%2,290
2,290
  
20242.20%400

  
2025 through 20494.27%20,120
19,895
  
Variable rate due 20202.50%800
1,875
  
Variable rate due 20212.42%125
125
  
Total long-term senior notes and debt 30,377
34,025
  
Other long-term debt —     
Pollution control revenue bonds —     
Maturity     
2019
25
  
20222.35%53
90
  
2023
33
  
2025 through 20532.40%1,466
1,112
  
Variable rate due 20201.80%7
148
  
Variable rate due 20211.75%65
65
  
Variable rate due 2022
4
  
Variable rate due 20241.72%21
21
  
Variable rate due 2025 to 20521.69%1,351
1,396
  
Plant Daniel revenue bonds due 20217.13%270
270
  
FFB loans —     
Maturity     
20203.20%64
44
  
20213.20%64
44
  
20223.20%64
44
  
20233.20%64
44
  
20243.20%64
44
  
2025 to 20443.20%3,523
2,405
  
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026 to 20593.94%1,525
1,225
  
Junior subordinated notes due 20242.70%863

  
Junior subordinated notes due 2027 to 20775.00%4,433
3,570
  
Total other long-term debt 13,947
10,684
  
Unamortized fair value adjustment of long-term debt 430
474
  
Finance lease obligations 226
197
  
Unamortized debt premium (discount), net (152)(158)  
Unamortized debt issuance expense (247)(208)  
Total long-term debt44,787
45,220
  
Less:     
Amount due within one year 2,989
3,198
  
Amount held for sale 
1,286
  
Long-term debt excluding amounts due within one year and held for sale 41,798
40,736
56.6%58.1%
      
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CONSOLIDATED STATEMENTS OF CAPITALIZATION (continued)
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
    
  2019201820192018
  (in millions)(percent of total)
Redeemable Preferred Stock of Subsidiaries:     
Cumulative preferred stock     
$100 par or stated value — 4.20% to 4.92%     
Authorized — 10 million shares     
Outstanding — 475,115 shares 48
48
  
$1 par value — 5.00%     
Authorized — 28 million shares     
Outstanding — 10 million shares 243
243
  
Total redeemable preferred stock of subsidiaries
 



  
(annual dividend requirement — $15 million) 291
291
0.4
0.4
Common Stockholders' Equity:     
Common stock, par value $5 per share — 5,257
5,164
  
Authorized — 1.5 billion shares     
Issued — 2019: 1.1 billion shares     
  — 2018: 1.0 billion shares     
Treasury — 2019: 1.0 million shares     
      — 2018: 1.0 million shares     
Paid-in capital 11,734
11,094
  
Treasury, at cost (42)(38)  
Retained earnings 10,877
8,706
  
Accumulated other comprehensive loss (321)(203)  
Total common stockholders' equity 27,505
24,723
37.2
35.3
Noncontrolling interests 4,254
4,316
5.8
6.2
Total stockholders' equity 31,759
29,039
  
Total Capitalization $73,848
$70,066
100.0%100.0%

The accompanying notes are an integral part of these consolidated financial statements. 
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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 Southern Company Common Stockholders' Equity     
 Number of Common Shares Common Stock   
Accumulated
Other
Comprehensive Income
(Loss)
 
Preferred
and Preference Stock of Subsidiaries
 
Noncontrolling
Interests(a)
 
 Issued Treasury Par Value Paid-In Capital Treasury Retained Earnings   Total
 (in millions)
Balance at December 31, 2016991
 (1) $4,952
 $9,661
 $(31) $10,356
 $(180) $609
 $1,245
$26,612
Consolidated net income attributable
   to Southern Company

 
 
 
 
 842
 
 
 
842
Other comprehensive income (loss)
 
 
 
 
 
 (9) 
 
(9)
Stock issued18
 
 86
 707
 
 
 
 
 
793
Stock-based compensation
 
 
 105
 
 
 
 
 
105
Cash dividends of $2.3000 per share
 
 
 
 
 (2,300) 
 
 
(2,300)
Preferred and preference stock
   redemptions

 
 
 
 
 
 
 (609) 
(609)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 79
79
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (122)(122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 44
44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 
 
 114
114
Other
 
 
 (4) (5) (13) 
 
 1
(21)
Balance at December 31, 20171,009
 (1) 5,038
 10,469
 (36) 8,885
 (189) 
 1,361
25,528
Consolidated net income attributable
   to Southern Company

 
 
 
 
 2,226
 
 
 
2,226
Other comprehensive income
 
 
 
 
 
 26
 
 
26
Stock issued26
 
 126
 964
 
 
 
 
 
1,090
Stock-based compensation
 
 
 84
 
 
 
 
 
84
Cash dividends of $2.3800 per share
 
 
 
 
 (2,425) 
 
 
(2,425)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 1,372
1,372
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (164)(164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 58
58
Sale of noncontrolling interests
 
 
 (417) 
 
 
 
 1,690
1,273
Other
 
 
 (6) (2) 20
 (40) 
 (1)(29)
Balance at December 31, 20181,035
 (1) 5,164
 11,094
 (38) 8,706
 (203) 
 4,316
29,039
Consolidated net income attributable
   to Southern Company

 
 
 
 
 4,739
 
 
 
4,739
Other comprehensive income (loss)
 
 
 
 
 
 (118) 
 
(118)
Issuance of equity units(b)

 
 
 (198) 
 
 
 
 
(198)
Stock issued19
 
 93
 751
 
 
 
 
 
844
Stock-based compensation
 
 
 66
 
 
 
 
 
66
Cash dividends of $2.4600 per share
 
 
 
 
 (2,570) 
 
 
(2,570)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 276
276
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (327)(327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 (10)(10)
Other
 
 
 21
 (4) 2
 
 
 (1)18
Balance at December 31, 20191,054
 (1) $5,257
 $11,734
 $(42) $10,877
 $(321) $
 $4,254
$31,759
(a)
Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Southern PowerRedeemable Noncontrolling Interests" for additional information.
(b)
See Note 8 under "Equity Units" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of GeorgiaAlabama Power Company (the Company)(Alabama Power) (a wholly ownedwholly-owned subsidiary of The Southern Company) as of December 31, 20162019 and 2015, and2018, the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2016. 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Alabama Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company'sAlabama Power's management. Our responsibility is to express an opinion on theseAlabama Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Alabama Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Companymisstatement, whether due to error or fraud. Alabama Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. OurAs part of our audits, included considerationwe are required to obtain an understanding of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company'sAlabama Power's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence supportingregarding the amounts and disclosures in the financial statements, assessingstatements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statement presentation.statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2020
We have served as Alabama Power's auditor since 2002.
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STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$5,501
 $5,367
 $5,458
Wholesale revenues, non-affiliates258
 279
 276
Wholesale revenues, affiliates81
 119
 97
Other revenues285
 267
 208
Total operating revenues6,125
 6,032
 6,039
Operating Expenses:     
Fuel1,112
 1,301
 1,225
Purchased power, non-affiliates203
 216
 170
Purchased power, affiliates200
 216
 158
Other operations and maintenance1,821
 1,669
 1,709
Depreciation and amortization793
 764
 736
Taxes other than income taxes403
 389
 384
Total operating expenses4,532
 4,555
 4,382
Operating Income1,593
 1,477
 1,657
Other Income and (Expense):     
Allowance for equity funds used during construction52
 62
 39
Interest expense, net of amounts capitalized(336) (323) (305)
Other income (expense), net46
 20
 43
Total other income and (expense)(238) (241) (223)
Earnings Before Income Taxes1,355
 1,236
 1,434
Income taxes270
 291
 568
Net Income1,085
 945
 866
Dividends on Preferred and Preference Stock15
 15
 18
Net Income After Dividends on Preferred and Preference Stock$1,070
 $930
 $848
The accompanying notes are an integral part of these financial statements.

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STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Net Income$1,085
 $945
 $866
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $-, and $(1), respectively
 
 1
Reclassification adjustment for amounts included in net income,
net of tax of $2, $2, and $2, respectively
4
 4
 3
Total other comprehensive income (loss)4
 4
 4
Comprehensive Income$1,089
 $949
 $870
The accompanying notes are an integral part of these financial statements.
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STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$1,085
 $945
 $866
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total951
 917
 888
Deferred income taxes197
 174
 409
Allowance for equity funds used during construction(52) (62) (39)
Pension and postretirement funding(362) (4) (2)
Settlement of asset retirement obligations(127) (55) (26)
Natural disaster reserve accruals138
 16
 4
Other deferred charges – affiliated(42) 
 
Other, net(90) (17) 9
Changes in certain current assets and liabilities —     
-Receivables9
 (149) (168)
-Prepayments(4) (2) (2)
-Materials and supplies23
 (82) (34)
-Other current assets(85) 30
 20
-Accounts payable(41) 24
 71
-Accrued taxes49
 10
 (84)
-Accrued compensation(14) 8
 (2)
-Retail fuel cost over recovery47
 
 (76)
-Other current liabilities97
 128
 3
Net cash provided from operating activities1,779
 1,881
 1,837
Investing Activities:     
Property additions(1,757) (2,158) (1,882)
Nuclear decommissioning trust fund purchases(261) (279) (237)
Nuclear decommissioning trust fund sales260
 278
 237
Cost of removal net of salvage(103) (130) (112)
Change in construction payables(71) 26
 161
Other investing activities(31) (26) (43)
Net cash used for investing activities(1,963) (2,289) (1,876)
Financing Activities:     
Proceeds —     
Senior notes600
 500
 1,100
Preferred stock
 
 250
Pollution control revenue bonds
 120
 
Capital contributions from parent company1,240
 511
 361
Redemptions and repurchases —     
Senior notes(200) 
 (525)
Preferred and preference stock
 
 (238)
Pollution control revenue bonds
 (120) (36)
Payment of common stock dividends(844) (801) (714)
Other financing activities(31) (33) (35)
Net cash provided from financing activities765
 177
 163
Net Change in Cash, Cash Equivalents, and Restricted Cash581
 (231) 124
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year313
 544
 420
Cash, Cash Equivalents, and Restricted Cash at End of Year$894
 $313
 $544
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $19, $22, and $15 capitalized, respectively)$311
 $284
 $285
Income taxes (net of refunds)26
 106
 236
Noncash transactions — Accrued property additions at year-end200
 272
 245
The accompanying notes are an integral part of these financial statements.
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BALANCE SHEETS
At December 31, 2019 and 2018
Alabama Power Company 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$894
 $313
Receivables —   
Customer accounts receivable425
 403
Unbilled revenues134
 150
Affiliated37
 94
Other accounts and notes receivable72
 51
Accumulated provision for uncollectible accounts(22) (10)
Fossil fuel stock212
 141
Materials and supplies512
 546
Prepaid expenses50
 66
Other regulatory assets242
 137
Other current assets30
 18
Total current assets2,586
 1,909
Property, Plant, and Equipment:   
In service30,023
 30,402
Less: Accumulated provision for depreciation9,540
 9,988
Plant in service, net of depreciation20,483
 20,414
Nuclear fuel, at amortized cost296
 324
Construction work in progress890
 1,113
Total property, plant, and equipment21,669
 21,851
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries66
 65
Nuclear decommissioning trusts, at fair value1,023
 847
Miscellaneous property and investments128
 127
Total other property and investments1,217
 1,039
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization132
 
Deferred charges related to income taxes244
 240
Deferred under recovered regulatory clause revenues40
 116
Regulatory assets – asset retirement obligations1,019
 147
Other regulatory assets, deferred1,976
 1,240
Other deferred charges and assets269
 188
Total deferred charges and other assets3,680
 1,931
Total Assets$29,152
 $26,730
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

BALANCE SHEETS
At December 31, 2019 and 2018
Alabama Power Company 2019 Annual Report
Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$251
 $201
Accounts payable —   
Affiliated316
 364
Other514
 614
Customer deposits100
 96
Accrued taxes78
 44
Accrued interest92
 89
Accrued compensation216
 227
Asset retirement obligations195
 163
Other regulatory liabilities193
 116
Other current liabilities105
 45
Total current liabilities2,060
 1,959
Long-Term Debt (See accompanying statements)
8,270
 7,923
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes3,260
 2,962
Deferred credits related to income taxes1,960
 2,027
Accumulated deferred ITCs100
 106
Employee benefit obligations206
 314
Operating lease obligations107
 
Asset retirement obligations, deferred3,345
 3,047
Other cost of removal obligations412
 497
Other regulatory liabilities, deferred146
 69
Other deferred credits and liabilities40
 58
Total deferred credits and other liabilities9,576
 9,080
Total Liabilities19,906
 18,962
Redeemable Preferred Stock (See accompanying statements)
291
 291
Common Stockholder's Equity (See accompanying statements)
8,955
 7,477
Total Liabilities and Stockholder's Equity$29,152
 $26,730
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Alabama Power Company 2019 Annual Report
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term debt payable to affiliated trusts —     
Variable rate due 20425.20%$206
$206
  
Long-term notes payable —     
Maturity     
2019
200
  
20203.38%250
250
  
20213.81%220
220
  
20223.36%750
750
  
20233.55%300
300
  
2025-20494.41%5,775
5,175
  
Variable rate due 20212.90%25
25
  
Total long-term notes payable 7,320
6,920
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20342.46%207
207
  
Variable rate due 20211.75%65
65
  
Variable rate due 20241.72%21
21
  
Variable rate due 2028-20381.65%767
767
  
Total other long-term debt 1,060
1,060
  
Finance lease obligations 4
4
  
Unamortized debt premium (discount), net (14)(12)  
Unamortized debt issuance expense (55)(54)  
Total long-term debt 8,521
8,124
  
Less amount due within one year 251
201
  
Long-term debt excluding amount due within one year 8,270
7,923
47.2%50.4%
Redeemable Preferred Stock:     
Cumulative redeemable preferred stock     
$100 par or stated value — 4.20% to 4.92%     
Authorized — 3,850,000 shares     
Outstanding — 475,115 shares 48
48
  
$1 par value — 5.00%     
Authorized — 27,500,000 shares     
Outstanding — 10,000,000 shares: $25 stated value 243
243
  
Total redeemable preferred stock
(annual dividend requirement — $15 million)
 291
291
1.7
1.9
Common Stockholder's Equity:     
Common stock, par value $40 per share —     
Authorized — 40,000,000 shares     
Outstanding — 30,537,500 shares 1,222
1,222
  
Paid-in capital 4,755
3,508
  
Retained earnings 3,001
2,775
  
Accumulated other comprehensive loss (23)(28)  
Total common stockholder's equity 8,955
7,477
51.1
47.7
Total Capitalization $17,516
$15,691
100.0%100.0%
 The accompanying notes are an integral part of these financial statements.
Table of ContentsIndex to Financial Statements


STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report

 
Number of
Common
Shares
Issued
 
Common
Stock
 
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Income (Loss)
 Total
 (in millions)
Balance at December 31, 201631
 $1,222
 $2,613
 $2,518
 $(30) $6,323
Net income after dividends on
preferred and preference stock

 
 
 848
 
 848
Capital contributions from parent company
 
 373
 
 
 373
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (714) 
 (714)
Other
 
 
 (5) 
 (5)
Balance at December 31, 201731
 1,222
 2,986
 2,647
 (26) 6,829
Net income after dividends on
preferred and preference stock

 
 
 930
 
 930
Capital contributions from parent company
 
 522
 
 
 522
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (801) 
 (801)
Other
 
 
 (1) (6) (7)
Balance at December 31, 201831
 1,222
 3,508
 2,775
 (28) 7,477
Net income after dividends on
preferred and preference stock

 
 
 1,070
 
 1,070
Capital contributions from parent company
 
 1,247
 
 
 1,247
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (844) 
 (844)
Other
 
 
 
 1
 1
Balance at December 31, 201931
 $1,222
 $4,755
 $3,001
 $(23) $8,955
The accompanying notes are an integral part of these financial statements.

Table of ContentsIndex to Financial Statements


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, suchthe financial statements (pages II-263 to II-310) present fairly, in all material respects, the financial position of Georgia Power Company as of December 31, 20162019 and 2015,2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2016,2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Georgia Power's management. Our responsibility is to express an opinion on Georgia Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Georgia Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Georgia Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Georgia Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 201719, 2020

We have served as Georgia Power's auditor since 2002.
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DEFINITIONSSTATEMENTS OF INCOME
TermMeaning
2013 ARPAlternative Rate Plan approved by the Georgia PSC in 2013 for Georgia Power for the years 2014 through 2016 and subsequently extended through 2019
AFUDCAllowance for funds used during construction
Alabama PowerAlabama Power Company
AROAsset retirement obligation
ASCAccounting Standards Codification
ASUAccounting Standards Update
CCRCoal combustion residuals
Clean Air ActClean Air Act Amendments of 1990
CO2
Carbon dioxide
CWIPConstruction work in progress
DOEU.S. Department of Energy
EPAU.S. Environmental Protection Agency
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
FFBFederal Financing Bank
GAAPU.S. generally accepted accounting principles
Gulf PowerGulf Power Company
IRSInternal Revenue Service
ITCInvestment tax credit
KWHKilowatt-hour
LIBORLondon Interbank Offered Rate
Mississippi PowerMississippi Power Company
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MWMegawatt
NCCRNuclear Construction Cost Recovery
NRCU.S. Nuclear Regulatory Commission
OCIOther comprehensive income
Plant Vogtle Units 3 and 4Two new nuclear generating units under construction at Plant Vogtle
power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PPAPower purchase agreement
PSCPublic Service Commission
PTCProduction tax credit
ROEReturn on equity
S&PS&P Global Ratings, a division of S&P Global Inc.
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
SEGCOSouthern Electric Generating Company
Southern CompanyThe Southern Company
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DEFINITIONS
(continued)

TermMeaning
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiaries
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), SEGCO, Southern Nuclear, SCS, Southern LINC, PowerSecure, Inc. (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.
Southern PowerSouthern Power Company and its subsidiaries
traditional electric operating companiesAlabama Power, Georgia Power Company, Gulf Power, and Mississippi Power
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MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONSFor the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 20162019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$7,707
 $7,752
 $7,738
Wholesale revenues, non-affiliates129
 163
 163
Wholesale revenues, affiliates11
 24
 26
Other revenues561
 481
 383
Total operating revenues8,408
 8,420
 8,310
Operating Expenses:     
Fuel1,444
 1,698
 1,671
Purchased power, non-affiliates521
 430
 416
Purchased power, affiliates575
 723
 622
Other operations and maintenance1,972
 1,860
 1,724
Depreciation and amortization981
 923
 895
Taxes other than income taxes454
 437
 409
Estimated loss on Plant Vogtle Units 3 and 4
 1,060
 
Total operating expenses5,947
 7,131
 5,737
Operating Income2,461
 1,289
 2,573
Other Income and (Expense):     
Interest expense, net of amounts capitalized(409) (397) (419)
Other income (expense), net140
 115
 104
Total other income and (expense)(269) (282) (315)
Earnings Before Income Taxes2,192
 1,007
 2,258
Income taxes472
 214
 830
Net Income1,720
 793
 1,428
Dividends on Preferred and Preference Stock
 
 14
Net Income After Dividends on Preferred and Preference Stock$1,720
 $793
 $1,414
The accompanying notes are an integral part of these financial statements.
OVERVIEW
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Business Activities
STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company (the2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$1,720
 $793
 $1,428
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(15), $-, and $-, respectively(44) 
 
Reclassification adjustment for amounts included in net income,
net of tax of $1, $1, and $1, respectively
2
 3
 3
Total other comprehensive income (loss)(42) 3
 3
Comprehensive Income$1,678
 $796
 $1,431
The accompanying notes are an integral part of these financial statements.
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STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$1,720
 $793
 $1,428
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total1,193
 1,142
 1,100
Deferred income taxes179
 (260) 458
Pension, postretirement, and other employee benefits(146) (75) (68)
Pension and postretirement funding(200) 
 
Settlement of asset retirement obligations(151) (116) (120)
Retail fuel cost over recovery – long-term73
 
 
Other deferred charges – affiliated(108) 
 
Estimated loss on Plant Vogtle Units 3 and 4
 1,060
 
Other, net12
 (21) (83)
Changes in certain current assets and liabilities —     
-Receivables177
 8
 (256)
-Fossil fuel stock(41) 83
 (16)
-Prepaid income taxes102
 152
 (168)
-Other current assets(19) (43) (28)
-Accounts payable(92) 95
 (219)
-Accrued taxes58
 58
 1
-Retail fuel cost over recovery
 
 (84)
-Other current liabilities150
 (107) (33)
Net cash provided from operating activities2,907
 2,769
 1,912
Investing Activities:     
Property additions(3,510) (3,116) (2,704)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion            
 
 1,682
Nuclear decommissioning trust fund purchases(628) (839) (574)
Nuclear decommissioning trust fund sales622
 833
 568
Cost of removal, net of salvage(186) (107) (100)
Change in construction payables, net of joint owner portion(122) 68
 223
Payments pursuant to LTSAs(81) (54) (64)
Proceeds from dispositions and asset sales14
 138
 96
Other investing activities6
 (32) (39)
Net cash used for investing activities(3,885) (3,109) (912)
Financing Activities:     
Increase (decrease) in notes payable, net(179) 294
 (391)
Proceeds —     
FFB loan1,218
 
 
Senior notes750
 
 1,350
Pollution control revenue bonds issuances and remarketings584
 108
 65
Capital contributions from parent company634
 2,985
 431
Short-term borrowings250
 
 700
Other long-term debt
 
 370
Redemptions and repurchases —     
Senior notes(500) (1,500) (450)
Pollution control revenue bonds(223) (469) (65)
Short-term borrowings
 (150) (550)
Preferred and preference stock
 
 (270)
Other long-term debt
 (100) 
Payment of common stock dividends(1,576) (1,396) (1,281)
Premiums on redemption and repurchases of senior notes
 (152) 
Other financing activities(40) (20) (60)
Net cash provided from (used for) financing activities918
 (400) (151)
Net Change in Cash, Cash Equivalents, and Restricted Cash(60) (740) 849
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year112
 852
 3
Cash, Cash Equivalents, and Restricted Cash at End of Year$52
 $112
 $852
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $35, $26, and $23 capitalized, respectively)$373
 $408
 $386
Income taxes (net of refunds)110
 300
 496
Noncash transactions — Accrued property additions at year-end560
 683
 550
The accompanying notes are an integral part of these financial statements.
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BALANCE SHEETS
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$52
 $4
Restricted cash and cash equivalents
 108
Receivables —   
Customer accounts receivable533
 591
Unbilled revenues203
 208
Under recovered fuel clause revenues
 115
Joint owner accounts receivable136
 170
Affiliated21
 39
Other accounts and notes receivable209
 80
Accumulated provision for uncollectible accounts(2) (2)
Fossil fuel stock272
 231
Materials and supplies501
 519
Prepaid expenses63
 142
Regulatory assets – storm damage reserves213
 30
Regulatory assets – asset retirement obligations254
 
Other regulatory assets263
 169
Other current assets77
 70
Total current assets2,795
 2,474
Property, Plant, and Equipment:   
In service38,137
 37,675
Less: Accumulated provision for depreciation11,753
 12,096
Plant in service, net of depreciation26,384
 25,579
Nuclear fuel, at amortized cost555
 550
Construction work in progress5,650
 4,833
Total property, plant, and equipment32,589
 30,962
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries52
 51
Nuclear decommissioning trusts, at fair value1,013
 873
Miscellaneous property and investments64
 72
Total other property and investments1,129
 996
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization1,428
 
Deferred charges related to income taxes519
 517
Regulatory assets – asset retirement obligations, deferred2,865
 2,644
Other regulatory assets, deferred2,716
 2,258
Other deferred charges and assets500
 514
Total deferred charges and other assets8,028
 5,933
Total Assets$44,541
 $40,365
The accompanying notes are an integral part of these financial statements.

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BALANCE SHEETS
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$1,025
 $617
Notes payable365
 294
Accounts payable —   
Affiliated512
 575
Other711
 890
Customer deposits283
 276
Accrued taxes407
 377
Accrued interest118
 105
Accrued compensation233
 221
Operating lease obligations144
 
Asset retirement obligations265
��202
Other regulatory liabilities447
 169
Other current liabilities187
 183
Total current liabilities4,697
 3,909
Long-Term Debt (See accompanying statements)
10,791
 9,364
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes3,257
 3,062
Deferred credits related to income taxes2,862
 3,080
Accumulated deferred ITCs255
 262
Employee benefit obligations540
 599
Operating lease obligations, deferred1,282
 
Asset retirement obligations, deferred5,519
 5,627
Other deferred credits and liabilities273
 139
Total deferred credits and other liabilities13,988
 12,769
Total Liabilities29,476
 26,042
Common Stockholder's Equity (See accompanying statements)
15,065
 14,323
Total Liabilities and Stockholder's Equity$44,541
 $40,365
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.
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STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$498
  
20202.00%950
950
  
20212.40%325
325
  
20222.85%400
400
  
20235.75%100
100
  
20242.20%400

  
2026-20434.21%3,675
3,325
  
Total long-term notes payable 5,850
5,598
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20222.35%53
53
  
Due 2025-20532.37%1,217
748
  
Variable rate due 2019
108
  
Variable rate due 2026-20521.74%551
551
  
FFB loans —     
Maturity     
20203.20%64
44
  
20213.20%64
44
  
20223.20%64
44
  
20233.20%64
44
  
20243.20%64
44
  
2025-20443.20%3,523
2,405
  
Junior subordinated notes due 20775.00%270
270
  
Total other long-term debt 5,934
4,355
  
Finance lease obligations 156
142
  
Unamortized debt premium (discount), net (7)(6)  
Unamortized debt issuance expense (117)(108)  
Total long-term debt 11,816
9,981
  
Less amount due within one year 1,025
617
  
Long-term debt excluding amount due within one year 10,791
9,364
41.7%39.5%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 20,000,000 shares     
Outstanding — 9,261,500 shares 398
398
  
Paid-in capital 10,962
10,322
  
Retained earnings 3,756
3,612
  
Accumulated other comprehensive loss (51)(9)  
Total common stockholder's equity 15,065
14,323
58.3
60.5
Total Capitalization $25,856
$23,687
100.0%100.0%
The accompanying notes are an integral part of these financial statements.
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STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20169
 $398
 $6,885
 $4,086
 $(13) $11,356
Net income after dividends on
preferred and preference stock

 
 
 1,414
 
 1,414
Capital contributions from parent company
 
 443
 
 
 443
Other comprehensive income
 
 
 
 3
 3
Cash dividends on common stock
 
 
 (1,281) 
 (1,281)
Other
 
 
 (4) 
 (4)
Balance at December 31, 20179
 398
 7,328
 4,215
 (10) 11,931
Net income after dividends on
preferred and preference stock

 
 
 793
 
 793
Capital contributions from parent company
 
 2,994
 
 
 2,994
Other comprehensive income
 
 
 
 3
 3
Cash dividends on common stock
 
 
 (1,396) 
 (1,396)
Other
 
 
 
 (2) (2)
Balance at December 31, 20189
 398
 10,322
 3,612
 (9) 14,323
Net income after dividends on
preferred and preference stock

 
 
 1,720
 
 1,720
Capital contributions from parent company
 
 640
 
 
 640
Other comprehensive income (loss)
 
 
 
 (42) (42)
Cash dividends on common stock
 
 
 (1,576) 
 (1,576)
Balance at December 31, 20199
 $398
 $10,962
 $3,756
 $(51) $15,065
The accompanying notes are an integral part of these financial statements.
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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located withinof December 31, 2019 and 2018, the Staterelated statements of Georgiaoperations, comprehensive income (loss), common stockholder's equity, and to wholesale customerscash flows for each of the three years in the Southeast.
Many factors affect the opportunities, challenges, and risks of the Company's business of providing electric service. These factors include the ability to maintain a constructive regulatory environment, to maintain and grow energy sales, and to effectively manage and secure timely recovery of costs. These costs include those related to projected long-term demand growth, stringent environmental standards, reliability, fuel, capital expenditures, and restoration following major storms. In addition, construction continues on Plant Vogtle Units 3 and 4. The Company will own a 45.7% interest in these two nuclear generating units to increase its generation diversity and meet future supply needs. The Company has various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Company for the foreseeable future. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" herein for additional information on Plant Vogtle Units 3 and 4.
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC on April 14, 2016, the Company's 2013 ARP will continue in effect untilperiod ended December 31, 2019, and the Company will be requiredrelated notes (collectively referred to file its next base rate case by July 1, 2019. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate Plans" herein for additional information.
The Company continues to focus on several key performance indicators, including, but not limited to, customer satisfaction, plant availability, system reliability,as the execution of major construction projects, and net income after dividends on preferred and preference stock. The Company's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys to evaluate the Company's results and generally targets the top quartile of these surveys in measuring performance.
See RESULTS OF OPERATIONS herein for information on the Company's financial performance.
Earnings
The Company's 2016 net income after dividends on preferred and preference stock was $1.3 billion, representing a $70 million, or 5.6%, increase over the previous year. The increase was due primarily to an increase in base retail revenues effective January 1, 2016, as authorized by the Georgia PSC, the 2015 correction of an error affecting billings since 2013 to a small number of large commercial and industrial customers, and higher retail revenues in the third quarter 2016 due to warmer weather as compared to the corresponding period in 2015, partially offset by an adjustment for an expected refund to retail customers as a result of the Company's retail ROE exceeding the allowed retail ROE range under the 2013 ARP during 2016. Higher non-fuel operating expenses also partially offset the revenue increase.
The Company's 2015 net income after dividends on preferred and preference stock was $1.3 billion, representing a $35 million, or 2.9%, increase over the previous year. The increase was due primarily to an increase in base retail revenues effective January 1, 2015, as authorized by the Georgia PSC, and lower non-fuel operations and maintenance expenses, partially offset by the 2015 correction of an error affecting billings since 2013 to a small number of large commercial and industrial customers.
See Note 1 to"financial statements"). In our opinion, the financial statements under "General"present fairly, in all material respects, the financial position of Mississippi Power as of December 31, 2019 and FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Rate Plans" herein for additional information related to the 2015 error correction2018, and the 2016 expected refund to retail customers, respectively.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

RESULTS OF OPERATIONS
A condensed income statementits operations and its cash flows for each of the Company follows:
 Amount 
Increase (Decrease)
from Prior Year
 2016 2016 2015
 (in millions)
Operating revenues$8,383
 $57
 $(662)
Fuel1,807
 (226) (514)
Purchased power879
 15
 (124)
Other operations and maintenance1,960
 116
 (58)
Depreciation and amortization855
 9
 
Taxes other than income taxes405
 14
 (18)
Total operating expenses5,906
 (72) (714)
Operating income2,477
 129
 52
Interest expense, net of amounts capitalized388
 25
 15
Other income (expense), net38
 (23) 38
Income taxes780
 11
 40
Net income1,347
 70
 35
Dividends on preferred and preference stock17
 
 
Net income after dividends on preferred and preference stock$1,330
 $70
 $35
Operating Revenues
Operating revenues for 2016 were $8.4 billion, reflecting a $57 million increase from 2015. Details of operating revenues were as follows:
 Amount
 2016 2015
 (in millions)
Retail — prior year$7,727
 $8,240
Estimated change resulting from —   
Rates and pricing154
 88
Sales growth (decline)(10) 63
Weather113
 (19)
Fuel cost recovery(212) (645)
Retail — current year7,772
 7,727
Wholesale revenues —   
Non-affiliates175
 215
Affiliates42
 20
Total wholesale revenues217
 235
Other operating revenues394
 364
Total operating revenues$8,383
 $8,326
Percent change0.7% (7.4)%
Retail base revenues of $5.6 billion in 2016 increased $256 million, or 4.8%, compared to 2015. The significant factors driving this change are shownthree years in the preceding table. The increaseperiod ended December 31, 2019, in rates and pricing was primarily due to increases in base tariffs approved under the 2013 ARP and the NCCR tariff, all effective January 1, 2016. Also contributing to the increase was the 2015 correction of an error affecting billings since 2013 to a small number of large commercial and industrial customers under a rate
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

plan allowing for variable demand-driven pricing. The increase was partially offset by an adjustment for an expected refund to retail customers as a result of the Company's retail ROE exceeding the allowed retail ROE range under the 2013 ARP during 2016. In 2016, residential base revenues increased $152 million, or 6.3%, commercial base revenues increased $65 million, or 3.0%, and industrial base revenues increased $39 million, or 5.6%, compared to 2015.
Retail base revenues of $5.3 billion in 2015 increased $133 million, or 2.6%, compared to 2014. The significant factors driving this change are shownconformity with accounting principles generally accepted in the preceding table. The increase in rates and pricing was primarily due to increases in base tariffs approved under the 2013 ARP and the NCCR tariff, all effective January 1, 2015, partially offset by the 2015 correctionUnited States of an error affecting billings since 2013 to a small number of large commercial and industrial customers under a rate plan allowingAmerica.
Basis for variable demand-driven pricing. In 2015, residential base revenues increased $104 million, or 4.5%, commercial base revenues increased $70 million, or 3.4%, and industrial base revenues decreased $41 million, or 5.6%, compared to 2014.Opinion
See Note 3 to theThese financial statements under "Retail Regulatory Matters – Rate Plans"are the responsibility of Mississippi Power's management. Our responsibility is to express an opinion on Mississippi Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and " – Nuclear Construction" for additional information. Also see "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes relatedare required to sales growth (decline) and weather.
Electric rates include provisionsbe independent with respect to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these fuel cost recovery provisions, fuel revenues generally equal fuel expenses and do not affect net income. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2016 2015 2014
 (in millions)
Capacity and other$72
 $108
 $164
Energy103
 107
 171
Total non-affiliated$175
 $215
 $335
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amounts billable under the contract terms and provide for recovery of fixed costs and a return on investment. Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of the Company's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Company's variable cost of energy.
Wholesale revenues from non-affiliated sales decreased $40 million, or 18.6%, in 2016 as compared to 2015 and decreased $120 million, or 35.8%, in 2015 as compared to 2014. The decrease in 2016 was related to decreases of $36 million in capacity revenues and $4 million in energy revenues. The decrease in 2015 was related to decreases of $64 million in energy revenues and $56 million in capacity revenues. The decreases in capacity revenues reflect the expiration of wholesale contracts in the second quarter 2016 and in December 2014, respectively, as well as the retirement of 14 coal-fired generating units since March 31, 2015 as a result of the Company's environmental compliance strategy. The decreases in energy revenues were primarily due to lower fuel prices. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Air Quality" herein for additional information regarding the Company's environmental compliance strategy.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are madeMississippi Power in accordance with the Intercompany Interchange Contract (IIC), as approved byU.S. federal securities laws and the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost. In 2016, wholesale revenues from sales to affiliates increased $22 million as compared to 2015 due to a 153.5% increase in KWH sales as a resultapplicable rules and regulations of the lower cost of Company-owned generation compared to the market cost of available energy, partially offset by lower coalSecurities and natural gas prices. In 2015, wholesale revenues from sales to affiliates decreased $22 million as compared to 2014 due to lower natural gas prices and a 50.6% decrease in KWH sales due to the higher cost of Company-owned generation compared to the market cost of available energy.
Other operating revenues increased $30 million, or 8.2%, in 2016 from the prior year primarily due to a $14 million increase related to customer temporary facilities services revenues and a $12 million increase in outdoor lighting revenues due to increased sales in new and replacement markets, primarily attributable to conversions from traditional to LED lighting. Other operating revenues decreased $7 million, or 1.9%, in 2015 from the prior year primarily due to a $16 million decrease in transmission
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

service revenues primarily as a result of a contract that expired in December 2014, partially offset by an $11 million increase in outdoor lighting revenues.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2016Exchange Commission and the percent change from the prior year were as follows:PCAOB.
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 2016 2016 2015 2016 2015
 (in billions)        
Residential27.6
 3.5 % (1.8)% 1.0 % 1.0%
Commercial32.9
 0.7
 0.9
 (1.0) 1.5
Industrial23.8
 (0.2) 1.1
 (0.9) 1.0
Other0.6
 (3.5) (0.2) (3.5) (0.1)
Total retail84.9
 1.3
 0.1
 (0.4)% 1.2%
Wholesale         
Non-affiliates3.4
 (2.5) (19.0)    
Affiliates1.4
 153.5
 (50.6)    
Total wholesale4.8
 18.8
 (25.5)    
Total energy sales89.7
 2.1 % (1.5)%    
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers.
In 2016, KWH sales for the residential class increased 3.5% compared to 2015 primarily due to warmer weather in the third quarter 2016 as compared to the corresponding period in 2015 and increased customer growth, partially offset by decreased customer usage. Weather-adjusted residential KWH sales increased by 1.0% primarily due to an increase of approximately 28,000 residential customers since December 31, 2015, partially offset by a decline in customer usage primarily resulting from an increase in multi-family housing and efficiency improvements in residential appliances and lighting. Weather-adjusted commercial KWH sales decreased by 1.0% primarily due to a decline in average customer usage resulting from an increase in electronic commerce transactions and energy saving initiatives, partially offset by an increase of approximately 2,600 commercial customers since December 31, 2015. Weather-adjusted industrial sales decreased 0.9% primarily due to decreased demand in the pipeline, primary metals, stone, clay, and glass, and textile sectors, partially offset by increased demand in the non-manufacturing sector.
In 2015, KWH sales for the residential class decreased compared to 2014 primarily due to milder weather in the first and fourth quarters 2015 as compared to the corresponding periods in 2014 and decreased customer usage, partially offset by an increase in customer growth. Weather-adjusted residential KWH sales increased by 1.0% primarily due to an increase of approximately 25,000 residential customers during 2015. Household income, one of the primary drivers of residential customer usage, had modest growth in 2015. Weather-adjusted commercial KWH sales increased by 1.5% primarily due to an increase of approximately 3,000 customers and an increase in customer usage. Weather-adjusted industrial KWH sales increased by 1.0% primarily due to increased demand in the pipeline, rubber, and paper sectors, partially offset by decreased demand in the chemicals and primary metals sectors.
See "Operating Revenues" above for a discussion of significant changes in wholesale sales to non-affiliates and affiliated companies.
Fuel and Purchased Power Expenses
Fuel costs constitute the single largest expense for the Company. The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the Company purchases a portion of its electricity needs from the wholesale market.
Table of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

Details of the Company's generation and purchased power were as follows:
 2016 2015 2014
Total generation (in billions of KWHs)
68.4
 65.9
 69.9
Total purchased power (in billions of KWHs)
24.8
 25.6
 23.1
Sources of generation (percent) —
     
Coal36
 34
 41
Nuclear24
 25
 22
Gas38
 39
 35
Hydro2
 2
 2
Cost of fuel, generated (in cents per net KWH) 
     
Coal3.28
 4.55
 4.52
Nuclear0.85
 0.78
 0.90
Gas2.36
 2.47
 3.67
Average cost of fuel, generated (in cents per net KWH)
2.33
 2.77
 3.40
Average cost of purchased power (in cents per net KWH)(*)
4.53
 4.33
 5.20
(*) Average cost of purchased power includes fuel purchased by the Company for tolling agreements where power is generated by the provider.
Fuel and purchased power expenses were $2.7 billion in 2016, a decrease of $211 million, or 7.3%, compared to 2015. The decrease was primarily due to a $334 million decrease in the average cost of fuel due to lower coal and natural gas prices and a $37 million decrease in the volume of KWHs purchased. Partially offsetting these decreases were a $111 million increase in the volume of KWHs generated to meet customer demand and a $49 million increase in the average cost of purchased power.
Fuel and purchased power expenses were $2.9 billion in 2015, a decrease of $638 million, or 18.0%, compared to 2014. The decrease was primarily due to a $544 million decrease in the average cost of fuel and purchased power largely as a result of lower natural gas prices and a $228 million decrease in the volume of KWHs generated by coal, partially offset by a $134 million increase in the volume of KWHs purchased due to lower natural gas prices.
Fuel and purchased power energy transactions do not have a significant impact on earnings since these fuel expenses are generally offset by fuel revenues through the Company's fuel cost recovery mechanism. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein for additional information.
Fuel
Fuel expense was $1.8 billion in 2016, a decrease of $226 million, or 11.1%, compared to 2015. The decrease was primarily due to a decrease of 18.6% in the average cost of coal and natural gas per KWH generated, partially offset by an increase of 10.0% in the volume of KWHs generated by coal. Fuel expense was $2.0 billion in 2015, a decrease of $514 million, or 20.2%, compared to 2014. The decrease was primarily due to a decrease of 32.7% in the average cost of natural gas per KWH generated and a decrease of 22.2% in the volume of KWHs generated by coal, partially offset by a 6.2% increase in the volume of KWHs generated by natural gas.
Purchased Power - Non-Affiliates
Purchased power expense from non-affiliates was $361 million in 2016, an increase of $72 million, or 24.9%, compared to 2015. The increase was primarily due to a 36.8% increase in the volume of KWHs purchased to meet customer demand, partially offset by a 12.5% decrease in the average cost per KWH purchased due to lower natural gas prices. Purchased power expense from non-affiliates was $289 million in 2015, an increase of $2 million, or 0.7%, compared to 2014. The increase was primarily due to a 28.1% increase in the volume of KWHs purchased to meet customer demand, partially offset by a 19.8% decrease in the average cost per KWH purchased due to lower natural gas prices.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
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MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

Purchased Power - Affiliates
Purchased power expense from affiliates was $518 million in 2016, a decrease of $57 million, or 9.9%, compared to 2015. The decrease was primarily due to an 11.9% decrease in the volume of KWHs purchased due to the lower market cost of available energy as compared to Southern Company system resources, partially offset by a 6.2% increase in the average cost per KWH purchased. Purchased power expense from affiliates was $575 million in 2015, a decrease of $126 million, or 18.0%, compared to 2014. The decrease was primarily due to a decrease of 17.4% in the average cost per KWH purchased reflecting lower natural gas prices, partially offset by an 8.1% increase in the volume of KWHs purchased to meet customer demand.
Energy purchases from affiliates will vary depending on the demand and the availability and cost of generating resources at each company within the Southern Company system. These purchases are madeWe conducted our audits in accordance with the IIC or other contractual agreements, all as approved bystandards of the FERC.
Other OperationsPCAOB. Those standards require that we plan and Maintenance Expenses
In 2016, other operations and maintenance expenses increased $116 million, or 6.3%, comparedperform the audit to 2015. The increase was primarily due to a $37 million decrease in gains from sales of assets, a $36 million charge in connection with cost containment activities, a $30 million increase in overhead line maintenance, a $15 million increase in hydro and gas generation maintenance, a $10 million increase in customer accounts, service, and sales costs, and a $7 million increase in material costs related to higher generation volumes. The increase was partially offset by a decrease of $36 million in pension costs.
In 2015, other operations and maintenance expenses decreased $58 million, or 3.0%, compared to 2014. The decrease was primarily due to decreases of $51 million in transmission operating expenses, primarily due to gains from sales of assets and billing adjustments with integrated transmission system owners, $28 million in transmission and distribution overhead line maintenance, and $11 million in workers compensation and legal expense related to a lower volume of claims, partially offset by an increase of $33 million in employee benefits including pension costs.
See FUTURE EARNINGS POTENTIAL – "Other Matters" herein and Note 2 toobtain reasonable assurance about whether the financial statements for additional information related to the cost containment activities and pension costs, respectively.
Depreciation and Amortization
Depreciation and amortization increased $9 million, or 1.1%, in 2016 compared to 2015. The increase was primarilyare free of material misstatement, whether due to a $34 million increase relatederror or fraud. Mississippi Power is not required to additional plant in service and a $9 million increase in other costhave, nor were we engaged to perform, an audit of removal, partially offset byits internal control over financial reporting. As part of our audits, we are required to obtain an $18 million decrease relatedunderstanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Mississippi Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to amortizationassess the risks of nuclear construction financing costs that was completed in December 2015 and a decreasematerial misstatement of $16 million related to unit retirements.
Depreciation and amortization remained flat in 2015 compared to 2014 primarily due to a $16 million decrease related to unit retirements and a $9 million decrease related to other cost of removal obligations, largely offset by a $23 million increase related to additional plant in service.
See Note 1 to the financial statements, under "Depreciation and Amortization" for additional information.
Taxes Other Than Income Taxes
In 2016, taxes other than income taxes increased $14 million, or 3.6%, compared to 2015 primarilywhether due to increases of $7 million in property taxes aserror or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a result of an increasetest basis, evidence regarding the amounts and disclosures in the assessed valuefinancial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of property and $4 million in payroll taxes.the financial statements. We believe that our audits provide a reasonable basis for our opinion.
In 2015, taxes other than income taxes decreased $18 million, or 4.4%, compared to 2014 primarily due to decreases of $15 million in municipal franchise fees related to lower retail revenues and $5 million in payroll taxes./s/ Deloitte & Touche LLP
Interest Expense, Net of Amounts CapitalizedAtlanta, Georgia
In 2016, interest expense, net of amounts capitalized increased $25 million, or 6.9%, compared to the prior year. The increase was primarily due to a $34 million increase in interest due to additional long-term borrowings from the FFB and higher interest rates on obligations for pollution control revenue bonds remarketed in 2015, partially offset by an increase of $4 million in AFUDC debt.February 19, 2020
In 2015, interest expense, net of amounts capitalized increased $15 million, or 4.3%, compared to the prior year. The increase was primarily due to a $23 million increase in interest due to additional long-term debt borrowings from the FFB, partially offset by an $11 million decrease in interest on senior notes due to redemptions and maturities.We have served as Mississippi Power's auditor since 2002.

Table of ContentsIndex to Financial Statements

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
GeorgiaSTATEMENTS OF OPERATIONS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 20162019 Annual Report


Other Income (Expense), Net
In 2016, other income (expense), net decreased $23 million compared to the prior year primarily due to decreases of $8 million in customer contributions in aid of construction, $6 million in wholesale operating fee revenue, and $4 million in gains on purchases of state tax credits.
In 2015, other income (expense), net increased $38 million compared to the prior year primarily due to increases of $9 million in wholesale operating fee revenue and $9 million in customer contributions in aid of construction, as well as a $9 million decrease in donations.
Income Taxes
Income taxes increased $11 million, or 1.4%, in 2016 compared to the prior year primarily due to higher pre-tax earnings, partially offset by decreases in non-deductible book depreciation and increased state investment tax credits.
Income taxes increased $40 million, or 5.5%, in 2015 compared to the prior year primarily due to higher pre-tax earnings and the recognition in 2014 of tax benefits related to emissions allowances and state apportionment.
Effects of Inflation
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$877
 $889
 $854
Wholesale revenues, non-affiliates237
 263
 259
Wholesale revenues, affiliates132
 91
 56
Other revenues18
 22
 18
Total operating revenues1,264
 1,265
 1,187
Operating Expenses:     
Fuel407
 405
 395
Purchased power20
 41
 25
Other operations and maintenance283
 313
 291
Depreciation and amortization192
 169
 161
Taxes other than income taxes113
 107
 104
Estimated loss on Kemper IGCC24
 37
 3,362
Total operating expenses1,039
 1,072
 4,338
Operating Income (Loss)225
 193
 (3,151)
Other Income and (Expense):     
Allowance for equity funds used during construction1
 
 72
Interest expense, net of amounts capitalized(69) (76) (42)
Other income (expense), net12
 17
 1
Total other income and (expense)(56) (59) 31
Earnings (Loss) Before Income Taxes169
 134
 (3,120)
Income taxes (benefit)30
 (102) (532)
Net Income (Loss)139
 236
 (2,588)
Dividends on Preferred Stock
 1
 2
Net Income (Loss) After Dividends on Preferred Stock$139
 $235
 $(2,590)
The Company is subject to rate regulation that is generally based on the recoveryaccompanying notes are an integral part of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on the Company's results of operations has not been substantial in recent years.these financial statements.
FUTURE EARNINGS POTENTIAL
General
The Company operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located in the State of Georgia and to wholesale customers in the Southeast. Prices for electricity provided by the Company to retail customers are set by the Georgia PSC under cost-based regulatory principles. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Utility Regulation" herein and Note 3 to the financial statements under "Retail Regulatory Matters" for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of the Company's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Company's business of selling electricity. These factors include the Company's ability to maintain a constructive regulatory environment that continues to allow for the timely recovery of prudently-incurred costs during a time of increasing costs and limited projected demand growth over the next several years. The completion and subsequent operation of ongoing construction projects, primarily Plant Vogtle Units 3 and 4, also are major factors. Future earnings will be driven primarily by customer growth. Earnings will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies, increasing volumes of electronic commerce transactions, and higher multi-family home construction. Earnings are subject to a variety of other factors. These factors include weather, competition, new energy contracts with other utilities, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of electricity, the price elasticity of demand, and the rate of economic growth or decline in the Company's service territory. Demand for electricity is primarily driven by economic growth. The pace of economic growth and electricity demand may be affected by changes in regional and global economic conditions, which may impact future earnings. Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction. The ultimate impact of any tax reform proposals, including any potential changes to the availability of nuclear PTCs, is dependent on the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on the Company's financial statements.
Environmental Matters
Compliance costs related to federal and state environmental statutes and regulations could affect earnings if such costs cannot continue to be fully recovered in rates on a timely basis. Environmental compliance spending over the next several years may differ materially from the amounts estimated. The timing, specific requirements, and estimated costs could change as environmental statutes and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are completed. The Company's Environmental Compliance Cost Recovery (ECCR) tariff allows for the recovery of capital and operations and maintenance costs related to environmental controls mandated by state and federal

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
GeorgiaSTATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 20162019 Annual Report


regulations. Further, higher costs that are recovered through regulated rates could contribute to reduced demand for electricity, which could negatively affect results of operations, cash flows, and financial condition. See Note 3 to the financial statements under "Environmental Matters" for additional information.
Environmental Statutes and Regulations
General
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Applicable statutes include the Clean Air Act; the Clean Water Act; the Comprehensive Environmental Response, Compensation, and Liability Act; the Resource Conservation and Recovery Act; the Toxic Substances Control Act; the Emergency Planning & Community Right-to-Know Act; the Endangered Species Act; the Migratory Bird Treaty Act; the Bald and Golden Eagle Protection Act; and related federal and state regulations. Compliance with these environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions. Through 2016, the Company had invested approximately $5.2 billion in environmental capital retrofit projects to comply with these requirements, with annual totals of approximately $0.2 billion, $0.3 billion, and $0.4 billion for 2016, 2015, and 2014, respectively. The Company expects that capital expenditures to comply with environmental statutes and regulations will total approximately $1.2 billion from 2017 through 2021, with annual totals of approximately $0.4 billion, $0.3 billion, $0.1 billion, $0.2 billion, and $0.2 billion for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential capital expenditures that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. The Company also anticipates costs associated with ash pond closure and ground water monitoring under the Disposal of Coal Combustion Residuals from Electric Utilities final rule (CCR Rule), which are reflected in the Company's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 1 to the financial statements under "Asset Retirement Obligations and Other Cost of Removal" for additional information.
 2019 2018 2017
 (in millions)
Net Income (Loss)$139
 $236
 $(2,588)
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $(1), and $(1), respectively
 (1) (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $1, respectively
1
 1
 1
Total other comprehensive income (loss)1
 
 
Comprehensive Income (Loss)$140
 $236
 $(2,588)
The Company's ultimate environmental compliance strategy, including potential unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations, including the environmental regulations described below; the time periods over which compliance with regulations is required; individual state implementation of regulations, as applicable; the outcome of any legal challenges to the environmental rules; any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology; the Company's fuel mix; and environmental remediation requirements. Compliance costs may arise from existing unit retirements, installation of additional environmental controls, upgrades to the transmission system, closure and monitoring of CCR facilities, and adding or changing fuel sources for certain existing units. The ultimate outcomeaccompanying notes are an integral part of these matters cannot be determined at this time.financial statements.
Compliance with any new federal or state legislation or regulations relating to air, water, and land resources or other environmental and health concerns could significantly affect the Company. Although new or revised environmental legislation or regulations could affect many areas of the Company's operations, the full impact of any such changes cannot be determined at this time. Additionally, many of the Company's commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity.
Air Quality
Compliance with the Clean Air Act and resulting regulations has been and will continue to be a significant focus for the Company.
In 2012, the EPA finalized the Mercury and Air Toxics Standards (MATS) rule, which imposes stringent emissions limits for acid gases, mercury, and particulate matter on coal- and oil-fired electric utility steam generating units. The implementation strategy for the MATS rule included emission controls, retirements, and fuel conversions at affected units. All of the Company's units that are subject to the MATS rule completed the measures necessary to achieve compliance with this rule or were retired prior to or during 2016.
The EPA regulates ground level ozone concentrations through implementation of an eight-hour ozone National Ambient Air Quality Standard (NAAQS). In 2008, the EPA adopted a revised eight-hour ozone NAAQS and published its final area designations in 2012. The only area within the Company's service territory designated as an ozone nonattainment area for the 2008 standard is a 15-county area within metropolitan Atlanta, which on December 23, 2016, the EPA proposed to redesignate to attainment. In October 2015, the EPA published a more stringent eight-hour ozone NAAQS. This new standard could potentially require additional emission controls, improvements in control efficiency, and operational fuel changes and could affect the siting of new generating facilities. States were required to recommend area designations by October 2016, and the only area within the

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
GeorgiaSTATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 20162019 Annual Report

Company's service territory that was proposed for designation is an eight-county area within the Atlanta metropolitan area in Georgia. The EPA is expected to finalize area designations by October 2017.
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income (loss)$139
 $236
 $(2,588)
Adjustments to reconcile net income (loss)
to net cash provided from operating activities —
     
Depreciation and amortization, total197
 177
 198
Deferred income taxes37
 475
 (727)
Allowance for equity funds used during construction(1) 
 (72)
Pension and postretirement funding(54) 
 
Settlement of asset retirement obligations(35) (35) (23)
Estimated loss on Kemper IGCC15
 33
 3,179
Other, net21
 18
 (8)
Changes in certain current assets and liabilities —     
-Receivables6
 (19) 540
-Fossil fuel stock(6) (3) 24
-Prepaid income taxes12
 (12) 
-Other current assets(2) (7) (13)
-Accounts payable3
 15
 (3)
-Accrued interest
 (1) (29)
-Accrued taxes11
 (46) 80
-Over recovered regulatory clause revenues16
 14
 (51)
-Other current liabilities(20) (41) (4)
Net cash provided from operating activities339
 804
 503
Investing Activities:     
Property additions(202) (188) (429)
Construction payables(1) 4
 (47)
Payments pursuant to LTSAs(23) (29) (10)
Other investing activities(37) (19) (18)
Net cash used for investing activities(263) (232) (504)
Financing Activities:     
Decrease in notes payable, net
 (4) (18)
Proceeds —     
Capital contributions from parent company51
 15
 1,002
Senior notes
 600
 
Long-term debt issuance to parent company
 
 40
Short-term borrowings
 300
 109
Pollution control revenue bonds43
 
 
Redemptions —     
Preferred stock
 (33) 
Pollution control revenue bonds
 (43) 
Short-term borrowings
 (300) (109)
Long-term debt to parent company
 
 (591)
Capital leases
 
 (71)
Senior notes(25) (155) (35)
Other long-term debt
 (900) (300)
Return of capital to parent company(150) 
 
Other financing activities(2) (7) (2)
Net cash provided from (used for) financing activities(83) (527) 25
Net Change in Cash, Cash Equivalents, and Restricted Cash(7) 45
 24
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year293
 248
 224
Cash, Cash Equivalents, and Restricted Cash at End of Year$286
 $293
 $248
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $(1), $-, and $29 capitalized, respectively)$71
 $80
 $65
Income taxes (net of refunds)(27) (525) (424)
Noncash transactions — Accrued property additions at year-end35
 35
 32
The EPA regulates fine particulate matter concentrations throughaccompanying notes are an annual and 24-hour average NAAQS, based on standards promulgated in 1997, 2006, and 2012. All areas in which the Company's generating units are located have been determined by the EPA to be in attainment with those standards.integral part of these financial statements. 
In 2010, the EPA revised the NAAQS for sulfur dioxide (SO2), establishing a new one-hour standard. No areas within the Company's service territory have been designated as nonattainment under this standard. However, in 2015, the EPA finalized a data requirements rule to support final EPA designation decisions for all remaining areas under the SO2 standard, which could result in nonattainment designations for areas within the Company's service territory. Nonattainment designations could require additional reductions in SO2 emissions and increased compliance and operational costs.
In 2014, the EPA proposed to delete from the Alabama State Implementation Plan (SIP) the Alabama opacity rule that the EPA approved in 2008, which provides operational flexibility to affected units, including units owned by SEGCO, which is jointly owned by Alabama Power and the Company. In 2013, the U.S. Court of Appeals for the Eleventh Circuit ruled in favor of Alabama Power and the Company and vacated an earlier attempt by the EPA to rescind its 2008 approval. The EPA's latest proposal characterizes the proposed deletion as an error correction within the meaning of the Clean Air Act. Alabama Power and the Company believe this interpretation of the Clean Air Act to be incorrect. If finalized, this proposed action could affect unit availability and result in increased operations and maintenance costs for SEGCO. See Note 4 to the financial statements for additional information regarding SEGCO.
On July 6, 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR). CSAPR is an emissions trading program that limits SO2 and nitrogen oxide (NOx) emissions from power plants in two phases – Phase 1 in 2015 and Phase 2 in 2017. On October 26, 2016, the EPA published a final rule that updates the CSAPR ozone season NOx program, beginning in 2017, and establishes more stringent ozone-season emissions budgets in Alabama. The State of Georgia's emission budget was not affected by the revisions, but interstate emissions trading is restricted unless the state decides to voluntarily adopt a reduced budget. Georgia and Alabama are also in the CSAPR annual SO2 and NOx programs.
The EPA finalized regional haze regulations in 2005, with a goal of restoring natural visibility conditions in certain areas (primarily national parks and wilderness areas) by 2064. The rule involves the application of best available retrofit technology to certain sources, including fossil fuel-fired generating facilities, built between 1962 and 1977 and any additional emissions reductions necessary for each designated area to achieve reasonable progress toward the natural visibility conditions goal by 2018 and for each 10-year period thereafter. On December 14, 2016, the EPA finalized revisions to the regional haze regulations. These regulations establish a deadline of July 31, 2021 for states to submit revised SIPs to the EPA demonstrating reasonable progress toward the statutory goal of achieving natural background conditions by 2064. State implementation of the reasonable progress requirements defined in this final rule could require further reductions in SO2 or NOx emissions.
In June 2015, the EPA published a final rule requiring certain states (including Georgia and Alabama) to revise or remove the provisions of their SIPs relating to the regulation of excess emissions at industrial facilities, including fossil fuel-fired generating facilities, during periods of startup, shut-down, or malfunction (SSM), and the State of Georgia has submitted proposed SIP revisions in response to the rule.
The Company has developed and continually updates a comprehensive environmental compliance strategy to assess compliance obligations associated with the current and proposed environmental requirements discussed above. These regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and results of operations, cash flows, and financial condition if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of the eight-hour ozone and SO2 NAAQS, Alabama opacity rule, CSAPR, regional haze regulations, and SSM rule will depend on various factors, such as implementation, adoption, or other action at the state level, and the outcome of pending and/or future legal challenges, and cannot be determined at this time.
Water Quality
The EPA's final rule establishing standards for reducing effects on fish and other aquatic life caused by new and existing cooling water intake structures at existing power plants and manufacturing facilities became effective in 2014. The effect of this final rule will depend on the results of additional studies that are currently underway and implementation of the rule by regulators based on site-specific factors. National Pollutant Discharge Elimination System (NPDES) permits issued after July 14, 2018 must include conditions to implement and ensure compliance with the standards and protective measures required by the rule.
In November 2015, the EPA published a final effluent guidelines rule which imposes stringent technology-based requirements for certain wastestreams from steam electric power plants. The revised technology-based limits and compliance dates will be

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
GeorgiaBALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 20162019 Annual Report


incorporated into future renewals
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$286
 $293
Receivables —   
Customer accounts receivable35
 34
Unbilled revenues39
 41
Affiliated27
 21
Other accounts and notes receivable26
 31
Fossil fuel stock26
 20
Materials and supplies61
 53
Other regulatory assets99
 116
Prepaid income taxes
 12
Other current assets10
 7
Total current assets609
 628
Property, Plant, and Equipment:   
In service4,857
 4,900
Less: Accumulated provision for depreciation1,463
 1,429
Plant in service, net of depreciation3,394
 3,471
Construction work in progress126
 103
Total property, plant, and equipment3,520
 3,574
Other Property and Investments131
 24
Deferred Charges and Other Assets:   
Deferred charges related to income taxes32
 33
Regulatory assets – asset retirement obligations210
 143
Other regulatory assets, deferred360
 331
Accumulated deferred income taxes139
 150
Other deferred charges and assets34
 3
Total deferred charges and other assets775
 660
Total Assets$5,035
 $4,886
The accompanying notes are an integral part of NPDES permits at affected units and may require the installation and operationthese financial statements.


BALANCE SHEETS
At December 31, 2023 will be established in permits based on information provided for each applicable wastestream.2019 and 2018
In 2015,Mississippi Power Company 2019 Annual Report

Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$281
 $40
Accounts payable —   
Affiliated76
 60
Other75
 90
Accrued taxes105
 95
Accrued interest15
 15
Accrued compensation35
 38
Accrued plant closure costs15
 29
Asset retirement obligations33
 34
Other regulatory liabilities21
 12
Over recovered regulatory clause liabilities29
 14
Other current liabilities49
 28
Total current liabilities734
 455
Long-Term Debt (See accompanying statements)
1,308
 1,539
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes424
 378
Deferred credits related to income taxes352
 382
Employee benefit obligations99
 115
Asset retirement obligations, deferred157
 126
Other cost of removal obligations189
 185
Other regulatory liabilities, deferred76
 81
Other deferred credits and liabilities44
 16
Total deferred credits and other liabilities1,341
 1,283
Total Liabilities3,383
 3,277
Common Stockholder's Equity (See accompanying statements)
1,652
 1,609
Total Liabilities and Stockholder's Equity$5,035
 $4,886
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Due 2028-20424.16%$950
$950
  
Adjustable rate due 20202.59%275
300
  
Total long-term notes payable 1,225
1,250
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20283.20%43

  
Variable rate due 20201.80%7
40
  
Variable rate due 2025-20281.80%33

  
Plant Daniel revenue bonds due 20217.13%270
270
  
Total other long-term debt 353
310
  
Unamortized debt premium (discount), net 19
27
  
Unamortized debt issuance expense (8)(8)  
Total long-term debt 1,589
1,579
  
Less amount due within one year 281
40
  
Long-term debt excluding amount due within one year 1,308
1,539
44.2%48.9%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 1,130,000 shares 

  
Outstanding — 1,121,000 shares 38
38
  
Paid-in capital 4,449
4,546
  
Accumulated deficit (2,832)(2,971)  
Accumulated other comprehensive loss (3)(4)  
Total common stockholder's equity 1,652
1,609
55.8
51.1
Total Capitalization $2,960
$3,148
100.0%100.0%
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the EPAYears Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 Number of Common Shares Issued 
Common
Stock
 Paid-In Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20161
 $38
 $3,525
 $(616) $(4) $2,943
Net loss after dividends on preferred stock
 
 
 (2,590) 
 (2,590)
Capital contributions from parent company
 
 1,004
 
 
 1,004
Other
 
 
 1
 
 1
Balance at December 31, 20171
 38
 4,529
 (3,205) (4) 1,358
Net income after dividends on preferred stock
 
 
 235
 
 235
Capital contributions from parent company
 
 17
 
 
 17
Other
 
 
 (1) 
 (1)
Balance at December 31, 20181
 38
 4,546
 (2,971) (4) 1,609
Net income after dividends on preferred stock
 
 
 139
 
 139
Return of capital to parent company
 
 (150) 
 
 (150)
Capital contributions from parent company
 
 53
 
 
 53
Other comprehensive income
 
 
 
 1
 1
Balance at December 31, 20191
 $38
 $4,449
 $(2,832) $(3) $1,652
The accompanying notes are an integral part of these financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the U.S. Army CorpsBoard of Engineers jointly published a final rule revising the regulatory definitionDirectors of waters of the U.S. for all Clean Water Act (CWA) programs. The final rule significantly expands the scope of federal jurisdiction under the CWASouthern Power Company and could have significant impacts on economic development projects which could affect customer demand growth. In addition, this rule could significantly increase permitting and regulatory requirements and costs associated with the siting of new facilities and the installation, expansion, and maintenance of transmission and distribution lines. The rule became effective in August 2015 but, in October 2015, the U.S. Court of Appeals for the Sixth Circuit issued an order staying implementation of the final rule. The case is held in abeyance pending review by the U.S. Supreme Court of challenges to the U.S. Court of Appeals for the Sixth Circuit's jurisdiction in the case.Subsidiary Companies
These water quality regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. Also, results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of these final rules will depend on various factors, such as pending and/or future legal challenges, compliance dates, and implementation of the rules, and cannot be determined at this time.
Coal Combustion Residuals
The Company currently manages CCR at onsite storage units consisting of landfills and surface impoundments (CCR Units) at 12 current or former electric generating plants. In addition to on-site storage, the Company also sells a portion of its CCR to third parties for beneficial reuse. Individual states regulate CCR and the State of Georgia has its own regulatory requirements. The Company has an inspection program in place to assist in maintaining the integrity of its coal ash surface impoundments.
The CCR Rule became effective in October 2015. The CCR Rule regulates the disposal of CCR, including coal ash and gypsum, as non-hazardous solid waste in CCR Units at active generating power plants. The CCR Rule does not automatically require closure of CCR Units but includes minimum criteria for active and inactive surface impoundments containing CCR and liquids, lateral expansions of existing units, and active landfills. Failure to meet the minimum criteria can result in the required closure of a CCR Unit. On December 16, 2016, President Obama signed the Water Infrastructure Improvements for the Nation Act (WIIN Act). The WIIN Act allows states to establish permit programs for implementing the CCR Rule, if the EPA approves the program, and allows for federal permits and EPA enforcement where a state permitting program does not exist. On October 26, 2016, the Georgia Department of Natural Resources approved amendments to its state solid waste regulations to incorporate the requirements of the CCR Rule and establish additional requirements for all of the Company's onsite storage units consisting of landfills and surface impoundments.
Based on current cost estimates for closure and monitoring of ash ponds pursuant to the CCR Rule, the Company has recorded incremental AROs related to the CCR Rule. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, the Company expects to continue to periodically update these estimates. The Company has posted closure and post-closure care plans to its public website as required by the CCR Rule; however, the ultimate impact of the CCR Rule will dependOpinion on the resultsFinancial Statements
We have audited the accompanying consolidated balance sheets of initialSouthern Power Company and ongoing minimum criteria assessments and implementationsubsidiary companies (Southern Power) (a wholly-owned subsidiary of state or federal permit programs. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates.
See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information regarding the Company's AROsSouthern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Southern Power's management. Our responsibility is to express an opinion on Southern Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Power's auditor since 2002.

CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Wholesale revenues, non-affiliates$1,528
 $1,757
 $1,671
Wholesale revenues, affiliates398
 435
 392
Other revenues12
 13
 12
Total operating revenues1,938
 2,205
 2,075
Operating Expenses:     
Fuel577
 699
 621
Purchased power108
 176
 149
Other operations and maintenance359
 395
 386
Depreciation and amortization479
 493
 503
Taxes other than income taxes40
 46
 48
Asset impairment3
 156
 
Gain on dispositions, net(23) (2) 
Total operating expenses1,543
 1,963
 1,707
Operating Income395
 242
 368
Other Income and (Expense):     
Interest expense, net of amounts capitalized(169) (183) (191)
Other income (expense), net47
 23
 1
Total other income and (expense)(122) (160) (190)
Earnings Before Income Taxes273
 82
 178
Income taxes (benefit)(56) (164) (939)
Net Income329
 246
 1,117
Net income (loss) attributable to noncontrolling interests(10) 59
 46
Net Income Attributable to Southern Power$339
 $187
 $1,071
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$329
 $246
 $1,117
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(22), $(17), and $39, respectively(66) (51) 63
Reclassification adjustment for amounts included in net income,
net of tax of $14, $19, and $(46), respectively
41
 58
 (73)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(6), $2, and $-, respectively(17) 5
 
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $-, respectively

 2
 
Total other comprehensive income (loss)(42) 14
 (10)
Comprehensive income (loss) attributable to noncontrolling interests(10) 59
 46
Comprehensive Income Attributable to Southern Power$297
 $201
 $1,061
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$329
 $246
 $1,117
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total505
 524
 536
Deferred income taxes(74) (244) (263)
Utilization of federal investment tax credits734
 5
 
Amortization of investment tax credits(151) (58) (57)
Accrued income taxes, non-current
 (14) 14
Income taxes receivable, non-current25
 42
 (61)
Pension and postretirement funding(24) 
 
Asset impairment3
 156
 
Other, net(33) 7
 (13)
Changes in certain current assets and liabilities —     
-Receivables72
 (20) (60)
-Prepaid income taxes39
 25
 24
-Other current assets(8) (26) (28)
-Accrued taxes6
 7
 (55)
-Other current liabilities(38) (19) 1
Net cash provided from operating activities1,385
 631
 1,155
Investing Activities:     
Business acquisitions. net of cash acquired(50) (65) (1,016)
Property additions(489) (315) (268)
Change in construction payables7
 (6) (153)
Investment in unconsolidated subsidiaries(116) 
 
Proceeds from dispositions and asset sales572
 203
 
Payments pursuant to LTSAs and for equipment not yet received(104) (75) (203)
Other investing activities13
 31
 15
Net cash used for investing activities(167) (227) (1,625)
Financing Activities:     
Increase (decrease) in notes payable, net449
 (105) (104)
Proceeds —     
Short-term borrowings100
 200
 
Capital contributions from parent company64
 2
 
Senior notes
 
 525
Other long-term debt
 
 43
Redemptions —     
Senior notes(600) (350) (500)
Other long-term debt
 (420) (18)
Short-term borrowings(100) (100) 
Return of capital to parent company(755) (1,650) 
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Purchase of membership interests from noncontrolling interests
 
 (59)
Payment of common stock dividends(206) (312) (317)
Other financing activities(12) (26) (33)
Net cash used for financing activities(1,120) (363) (502)
Net Change in Cash, Cash Equivalents, and Restricted Cash98
 41
 (972)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year181
 140
 1,112
Cash, Cash Equivalents, and Restricted Cash at End of Year$279
 $181
 $140
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $15, $17, and $11 capitalized, respectively)$167
 $173
 $189
Income taxes (net of refunds and investment tax credits)(664) 79
 (487)
Noncash transactions — Accrued property additions at year-end57
 31
 32
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$279
 $181
Receivables —   
Customer accounts receivable107
 111
Affiliated30
 55
Other73
 116
Materials and supplies191
 220
Prepaid income taxes36
 25
Other current assets43
 37
Total current assets759
 745
Property, Plant, and Equipment:   
In service13,270
 13,271
Less: Accumulated provision for depreciation2,464
 2,171
Plant in service, net of depreciation10,806
 11,100
Construction work in progress515
 430
Total property, plant, and equipment11,321
 11,530
Other Property and Investments:   
Intangible assets, net of amortization of $69 and $61
at December 31, 2019 and December 31, 2018, respectively
322
 345
Equity investments in unconsolidated subsidiaries28
 
Total other property and investments350
 345
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization369
 
Prepaid LTSAs128
 98
Accumulated deferred income taxes551
 1,186
Income taxes receivable, non-current5
 30
Assets held for sale601
 576
Other deferred charges and assets216
 373
Total deferred charges and other assets1,870
 2,263
Total Assets$14,300
 $14,883
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$824
 $599
Notes payable549
 100
Accounts payable —   
Affiliated56
 92
Other85
 77
Accrued taxes26
 6
Accrued interest32
 36
Other current liabilities132
 121
Total current liabilities1,704
 1,031
Long-Term Debt:   
Senior notes —   
2.375% due 2020
 300
2.50% due 2021300
 300
1.00% due 2022674
 687
2.75% due 2023290
 290
Weighted average interest rate 4.12% at 12/31/19 due 2025-20462,337
 2,348
Other long-term debt —   
Variable rate (3.34% at 12/31/18) due 2020
 525
Unamortized debt premium (discount), net(8) (9)
Unamortized debt issuance expense(19) (23)
Total long-term debt3,574
 4,418
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes115
 105
Accumulated deferred ITCs1,731
 1,832
Operating lease obligations376
 
Other deferred credits and liabilities178
 213
Total deferred credits and other liabilities2,400
 2,150
Total Liabilities7,678
 7,599
Common Stockholder's Equity:   
Common stock, par value $0.01 per share —   
Authorized — 1,000,000 shares   
Outstanding — 1,000 shares
 
Paid-in capital909
 1,600
Retained earnings1,485
 1,352
Accumulated other comprehensive income (loss)(26) 16
Total common stockholder's equity2,368
 2,968
Noncontrolling Interests4,254
 4,316
Total Stockholders' Equity6,622
 7,284
Total Liabilities and Stockholders' Equity$14,300
 $14,883
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings
 Accumulated Other Comprehensive Income Total Common Stockholder's Equity 
Noncontrolling Interests(a)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $3,671
 $724
 $35
 $4,430
 $1,245
 $5,675
Net income attributable
   to Southern Power

 
 
 1,071
 
 1,071
 
 1,071
Capital contributions to
   parent company, net

 
 (2) 
 
 (2) 
 (2)
Other comprehensive income (loss)
 
 
 
 (10) (10) 
 (10)
Cash dividends on common
   stock

 
 
 (317) 
 (317) 
 (317)
Other comprehensive income
transfer from SCS
(b)

 
 
 
 (27) (27) 
 (27)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 79
 79
Distributions to noncontrolling
   interests

 
 
 
 
 
 (122) (122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 44
 44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 114
 114
Other
 
 (7) 
 
 (7) 
 (7)
Balance at December 31, 2017
 
 3,662
 1,478
 (2) 5,138
 1,360
 6,498
Net income attributable
   to Southern Power

 
 
 187
 
 187
 
 187
Return of capital to parent
   company

 
 (1,650) 
 
 (1,650) 
 (1,650)
Capital contributions from parent
   company

 
 2
 
 
 2
 
 2
Other comprehensive income
 
 
 
 14
 14
 
 14
Cash dividends on common
   stock

 
 
 (312) 
 (312) 
 (312)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 1,372
 1,372
Distributions to noncontrolling
   interests

 
 
 
 
 
 (164) (164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 59
 59
Sale of noncontrolling interests(c)

 
 (417) 
 
 (417) 1,690
 1,273
Other
 
 3
 (1) 4
 6
 (1) 5
Balance at December 31, 2018
 
 1,600
 1,352
 16
 2,968
 4,316
 7,284
Net income attributable
   to Southern Power

 
 
 339
 
 339
 
 339
Return of capital to parent
   company

 
 (755) 
 
 (755) 
 (755)
Capital contributions from parent
   company

 
 64
 
 
 64
 
 64
Other comprehensive income (loss)
 
 
 
 (42) (42) 
 (42)
Cash dividends on common
   stock

 
 
 (206) 
 (206) 
 (206)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 276
 276
Distributions to noncontrolling
   interests

 
 
 
 
 
 (327) (327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 (10) (10)
Other
 
 
 
 
 
 (1) (1)
Balance at December 31, 2019
 $
 $909
 $1,485
 $(26) $2,368
 $4,254
 $6,622
(a)Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Noncontrolling Interests" for additional information.
(b)In connection with Southern Power becoming a participant to the Southern Company qualified pension plan and other postretirement benefit plan, $27 million of other comprehensive income, net of tax of $9 million, was transferred from SCS.
(c)
See Note 15 under "Southern Power - Sales of Renewable Facility Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Company Gas as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
We did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment which is accounted for by the use of the equity method. The accompanying consolidated financial statements of Southern Company Gas include its equity investment in SNG of $1,137 million and $1,261 million as of December 31, 2019 and December 31, 2018, respectively, and its earnings from its equity method investment in SNG of $141 million, $131 million, and $88 million for the years ended December 31, 2019, 2018, and 2017, respectively. Those statements were audited by other auditors whose reports (which express unqualified opinions on SNG's financial statements and contain an emphasis of matter paragraph calling attention to SNG's significant transactions with related parties) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the reports of the other auditors.
Basis for Opinion
These financial statements are the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion on Southern Company Gas' financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company Gas in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Company Gas is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Company Gas' internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the reports of the other auditors provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company Gas' auditor since 2016.

CONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Operating Revenues:      
Natural gas revenues (includes revenue taxes of $117, $114, and $100
for the periods presented, respectively)
 $3,793
 $3,874
 $3,787
Alternative revenue programs (1) (20) 4
Other revenues 
 55
 129
Total operating revenues 3,792
 3,909
 3,920
Operating Expenses:      
Cost of natural gas 1,319
 1,539
 1,601
Cost of other sales 
 12
 29
Other operations and maintenance 888
 981
 945
Depreciation and amortization 487
 500
 501
Taxes other than income taxes 213
 211
 184
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Total operating expenses 3,022
 2,994
 3,260
Operating Income 770
 915
 660
Other Income and (Expense):      
Earnings from equity method investments 157
 148
 106
Interest expense, net of amounts capitalized (232) (228) (200)
Other income (expense), net 20
 1
 44
Total other income and (expense) (55) (79) (50)
Earnings Before Income Taxes 715
 836
 610
Income taxes 130
 464
 367
Net Income $585
 $372
 $243
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Net Income $585
 $372
 $243
Other comprehensive income (loss):      
Qualifying hedges:      
Changes in fair value, net of tax of $(2), $2, and $(3), respectively (5) 5
 (5)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $(1), and $-, respectively
 2
 (1) 1
Pension and other postretirement benefit plans:      
Benefit plan net gain (loss), net of tax of $(14), $-, and $-, respectively (16) 
 (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $3, and $-, respectively
 
 (2) 
Total other comprehensive income (loss) (19) 2
 (5)
Comprehensive Income $566
 $374
 $238
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
Southern Company Gas and Subsidiary Companies 2019 Annual Report
  2019 2018 2017
  (in millions)
Operating Activities:      
Net income $585
 $372
 $243
Adjustments to reconcile net income to net cash
provided from operating activities —
      
Depreciation and amortization, total 487
 500
 501
Deferred income taxes 213
 (1) 236
Pension and postretirement funding (145) 
 
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Mark-to-market adjustments (56) (19) (24)
Other, net (55) (24) (51)
Changes in certain current assets and liabilities —      
-Receivables 467
 (218) (94)
-Natural gas for sale 44
 49
 36
-Prepaid income taxes 40
 (42) (39)
-Other current assets 31
 4
 (24)
-Accounts payable (520) 372
 (20)
-Accrued taxes (69) 10
 110
-Accrued compensation 1
 32
 15
-Other current liabilities (71) (22) (8)
Net cash provided from operating activities 1,067
 764
 881
Investing Activities:      
Property additions (1,408) (1,388) (1,514)
Cost of removal, net of salvage (82) (96) (66)
Change in construction payables, net 24
 (37) 72
Investments in unconsolidated subsidiaries (31) (110) (145)
Returned investment in unconsolidated subsidiaries 67
 20
 80
Proceeds from dispositions and asset sales 32
 2,609
 
Other investing activities 12
 
 5
Net cash provided from (used for) investing activities (1,386) 998
 (1,568)
Financing Activities:      
Increase (decrease) in notes payable, net 
 (868) 262
Proceeds —      
First mortgage bonds 300
 300
 400
Capital contributions from parent company 821
 24
 103
Senior notes 
 
 450
Redemptions and repurchases —      
Gas facility revenue bonds 
 (200) 
Medium-term notes 
 
 (22)
First mortgage bonds (50) 
 
Senior notes (300) (155) 
Return of capital to parent company 
 (400) 
Payment of common stock dividends (471) (468) (443)
Other financing activities (2) (3) (9)
Net cash provided from (used for) financing activities 298
 (1,770) 741
Net Change in Cash, Cash Equivalents, and Restricted Cash (21) (8) 54
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year 70
 78
 24
Cash, Cash Equivalents, and Restricted Cash at End of Year $49
 $70
 $78
Supplemental Cash Flow Information:      
Cash paid (received) during the period for —      
Interest (net of $6, $7, and $11 capitalized, respectively) $251
 $249
 $223
Income taxes (net of refunds) (41) 524
 72
Noncash transactions — Accrued property additions at year-end 122
 97
 135
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Assets 2019 2018
  (in millions)
Current Assets:    
Cash and cash equivalents $46
 $64
Receivables —    
Energy marketing receivable 428
 801
Customer accounts receivable 323
 370
Unbilled revenues 183
 213
Affiliated 5
 11
Other accounts and notes receivable 114
 142
Accumulated provision for uncollectible accounts (18) (30)
Natural gas for sale 479
 524
Prepaid expenses 65
 118
Assets from risk management activities, net of collateral 177
 219
Other regulatory assets 92
 73
Assets held for sale 171
 
Other current assets 41
 50
Total current assets 2,106
 2,555
Property, Plant, and Equipment:    
In service 16,344
 15,177
Less: Accumulated depreciation 4,650
 4,400
Plant in service, net of depreciation 11,694
 10,777
Construction work in progress 613
 580
Total property, plant, and equipment 12,307
 11,357
Other Property and Investments:    
Goodwill 5,015
 5,015
Equity investments in unconsolidated subsidiaries 1,251
 1,538
Other intangible assets, net of amortization of $176 and $145
at December 31, 2019 and December 31, 2018, respectively
 70
 101
Miscellaneous property and investments 20
 20
Total other property and investments 6,356
 6,674
Deferred Charges and Other Assets:    
Operating lease right-of-use assets, net of amortization 93
 
Other regulatory assets, deferred 618
 669
Other deferred charges and assets 207
 193
Total deferred charges and other assets 918
 862
Total Assets $21,687
 $21,448
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholder's Equity 2019 2018
  (in millions)
Current Liabilities:    
Securities due within one year $
 $357
Notes payable 650
 650
Energy marketing trade payables 442
 856
Accounts payable —    
Affiliated 41
 45
Other 315
 402
Customer deposits 96
 133
Accrued taxes —    
Accrued income taxes 
 66
Other accrued taxes 71
 75
Accrued interest 52
 55
Accrued compensation 100
 100
Liabilities from risk management activities, net of collateral 21
 76
Other regulatory liabilities 94
 79
Other current liabilities 128
 130
Total current liabilities 2,010
 3,024
Long-term Debt (See accompanying statements)
 5,845
 5,583
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 1,219
 1,016
Deferred credits related to income taxes 874
 940
Employee benefit obligations 265
 357
Operating lease obligations 78
 
Other cost of removal obligations 1,606
 1,585
Accrued environmental remediation 233
 268
Other deferred credits and liabilities 51
 105
Total deferred credits and other liabilities 4,326
 4,271
Total Liabilities 12,181
 12,878
Common Stockholder's Equity (See accompanying statements)
 9,506
 8,570
Total Liabilities and Stockholder's Equity $21,687
 $21,448
Commitments and Contingent Matters (See notes)
 

 

The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$300
  
20214.01%330
330
  
20228.63%46
46
  
20232.45%350
350
  
2025-20474.68%3,134
3,134
  
Total long-term notes payable 3,860
4,160
  
Other long-term debt —     
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026-20593.94%1,525
1,225
  
Total other long-term debt 1,575
1,325
  
Unamortized fair value adjustment of long-term debt 430
474
  
Unamortized debt discount (20)(19)  
Total long-term debt 5,845
5,940
  
Less amount due within one year 
357
  
Long-term debt excluding amount due within one year 5,845
5,583
38.1%39.4%
Common Stockholder's Equity:     
Common stock — par value $0.01 per share     
Authorized — 100 million shares     
Outstanding — 100 shares     
Paid-in capital 9,697
8,856
  
Accumulated deficit (198)(312)  
Accumulated other comprehensive income 7
26
  
Total common stockholder's equity 9,506
8,570
61.9
60.6
Total Capitalization $15,351
$14,153
100.0%100.0%

The accompanying notes are an integral part of these financial statements.

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Number of Common Shares
Issued
 Common Stock Paid-In Capital Retained Earnings (Accumulated Deficit) 
Accumulated
Other
Comprehensive Income (Loss)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $9,095
 $(12) $26
 $9,109
Net income
 
 
 243
 
 243
Capital contributions from parent company
 
 117
 
 
 117
Other comprehensive income (loss)
 
 
 
 (5) (5)
Cash dividends on common stock
 
 
 (443) 
 (443)
Other
 
 2
 
 (1) 1
Balance at December 31, 2017
 
 9,214
 (212) 20
 9,022
Net income
 
 
 372
 
 372
Return of capital to parent company
 
 (400) 
 
 (400)
Capital contributions from parent company
 
 42
 
 
 42
Other comprehensive income
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (468) 
 (468)
Other
 
 
 (4) 4
 
Balance at December 31, 2018
 
 8,856
 (312) 26
 8,570
Net income
 
 
 585
 
 585
Capital contributions from parent company
 
 841
 
 
 841
Other comprehensive income (loss)
 
 
 
 (19) (19)
Cash dividends on common stock
 
 
 (471) 
 (471)
Balance at December 31, 2019
 $
 $9,697
 $(198) $7
 $9,506

The accompanying notes are an integral part of these consolidated financial statements. 

COMBINED NOTES TO FINANCIAL STATEMENTS
Southern Company and Subsidiary Companies 2019 Annual Report




Notes to the Financial Statements
for
The Southern Company and Subsidiary Companies
Alabama Power Company
Environmental Remediation
The Southern Company system must comply with other environmental laws and regulations that covergoverning the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company may alsosystem could incur substantial costs to clean up affected sites. The traditional electric operating companies and Southern Company conductsGas conduct studies to determine the extent of any required cleanup and hashave recognized in its financial statements the estimated costs to clean up known impacted sites.sites in their financial statements. Amounts for cleanup and ongoing monitoring costs were not material for any year presented. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia (which represent substantially all of Southern Company Gas' accrued remediation costs) have all received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. The traditional electric operating companies and Southern Company Gas may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Notes 1 andNote 3 to the financial statements under "Environmental Remediation Recovery" and "Environmental Matters – "Environmental Remediation" respectively, for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

Global Climate Issues
In October 2015,On July 8, 2019, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing CO2 emissions from new, modified,Affordable Clean Energy rule (ACE Rule) to repeal and reconstructed units.replace the CPP. The other final action, known as the Clean Power Plan, establishes guidelines forACE Rule requires states to develop plans to meet EPA-mandatedunit-specific CO2 emission rates or emission reduction goalsrate standards for existing units.coal-fired units based on heat-rate efficiency improvements. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022ACE Rule is being challenged in the D.C. Circuit Court of Appeals and 2029 and final ratesGeorgia Power is an intervenor in 2030 and thereafter. At the same time, the EPA published a proposed federal plan and model rule that, when finalized, states can adopt or that would be putlitigation in place if a state either does not submit a state plan or its plan is not approved by the EPA. On February 9, 2016, the U.S. Supreme Court granted a staysupport of the Clean Power Plan, pending disposition of petitions for review with the courts. The stay will remain in effect through the resolution of the litigation, including any review by the U.S. Supreme Court.
These guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costsrule, as are not recovered through regulated rates or through PPAs. However, the ultimate financial and operational impact of the final rules on the Company cannot be determined at this time and will depend upon numerous factors, including the outcome of pending legal challenges, including legal challenges filed by the traditional electric operating companies, and any individual state implementation of the EPA's final guidelines in the event the rule is upheld and implemented.
In December 2015, parties to the United Nations Framework Convention on Climate Change – including the United States – adopted the Paris Agreement, which establishes a non-binding universal framework for addressing greenhouse gas emissions based on nationally determined contributions. It also sets in place a process for tracking progress toward the goals every five years.other industry parties. The ultimate impact of this agreement dependsthe ACE Rule to the Southern Company system will depend on itsstate implementation by participating countriesplan requirements and the outcome of associated legal challenges and cannot be determined at this time.
Additional GHG policies, including legislation, may emerge in the future requiring the United States to transition to a lower GHG emitting economy; however, associated impacts are currently unknown. The EPA's greenhouseSouthern Company system has transitioned from an electric generating mix of 70% coal and 15% natural gas reporting rule requires annual reportingin 2007 to a mix of greenhouse22% coal and 52% natural gas emissions expressed in terms2019, along with over 8,300 MWs of renewable resources. This transition has been supported in part by the Southern Company system retiring over 5,600 MWs of coal- and oil-fired generating capacity since 2010 and converting over 3,400 MWs of generating capacity from coal to natural gas since 2015. In addition, Southern Company Gas has replaced approximately 5,600 miles of bare steel and

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cast-iron pipe, resulting in removal of approximately 2.5 million metric tons of CO2 equivalentGHG from its natural gas distribution system since 1998.
The following table provides the Registrants' 2018 and preliminary 2019 GHG emissions for a company's operational control of facilities. Basedbased on ownership or financial control of facilities,facilities:
 2018Preliminary 2019
 
(in million metric tons of CO2 equivalent)
Southern Company(a)(b)
102
88
Alabama Power36
32
Georgia Power30
27
Mississippi Power8
9
Southern Power(b)
14
13
Southern Company Gas(b)
1
1
(a)Includes non-registrant subsidiaries.
(b)The 2018 and preliminary 2019 amounts include GHG emissions attributable to disposed assets through the date of the applicable disposition. See Note 15 to the financial statements for additional information regarding disposition activities.
Based on the Company's 2015 greenhousepreliminary 2019 amount above, the Southern Company system has achieved an estimated GHG emission reduction of 44% since 2007. In April 2018, Southern Company established an intermediate goal of a 50% reduction in carbon emissions from 2007 levels by 2030 and a long-term goal of low- to no-carbon operations by 2050. The Southern Company system's ability to achieve these goals depends on many external factors, including supportive national energy policies, low natural gas emissions were approximately 32 million metric tonsprices, and the development, deployment, and advancement of CO2 equivalent.relevant energy technologies. The preliminary estimateSouthern Company system expects to continue cost-effectively growing its renewable energy portfolio, optimizing technology advancements to modernize its transmission and distribution systems, increasing the use of natural gas for generation, completing Plant Vogtle Units 3 and 4, investing in energy efficiency, and continuing research and development efforts focused on technologies to lower GHG emissions. The Southern Company system is also evaluating methods of removing carbon from the atmosphere.
Regulatory Matters
Alabama Power
Alabama Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Company's 2016 greenhouse gas emissions on the same basis is approximately 33 million metric tons of CO2 equivalent. The level of greenhouse gas emissions from year to year will depend on the level of generation, the mix of fuel sources, and other factors.
FERC Matters
The Company has authorityAlabama PSC. Alabama Power currently recovers its costs from the FERCregulated retail business primarily through Rate RSE, Rate CNP, Rate ECR, and Rate NDR. In addition, the Alabama PSC issues accounting orders to sell electricity at market-based rates. Since 2008, that authority,address current events impacting Alabama Power. See Note 2 to the financial statements under "Alabama Power" for certain balancing authority areas, has been conditioned on compliance with the requirementsadditional information regarding Alabama Power's rate mechanisms and accounting orders.
Petition for Certificate of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company)Convenience and SouthernNecessity
On September 6, 2019, Alabama Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to providepetition for a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their responseCCN with the FERC.
On December 9, 2016,Alabama PSC for authorization to procure additional generating capacity through the traditional electric operating companies (includingturnkey construction of a new combined cycle facility and long-term contracts for the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction,purchase of power from others, both as more fully described below, as well as several non-tariff changes. On February 2, 2017, the FERC issuedAutauga Combined Cycle Acquisition. In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. This filing was predicated on the results of Alabama Power's 2019 IRP provided to the Alabama PSC, which identified an order accepting all such changesapproximately 2,400-MW resource need for Alabama Power, driven by the need for additional winter reserve capacity. See Note 15 to the financial statements under "Alabama Power" for additional information regarding the Autauga Combined Cycle Acquisition.
The procurement of these resources is subject to an additional conditionthe satisfaction or waiver of cost-based price caps for certain sales outsideconditions, including, among other customary conditions, approval by the Alabama PSC. The completion of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potentialAutauga Combined Cycle Acquisition is also subject to exert market power in certain areas servedapproval by the traditional electric operating companies (includingFERC. Alabama Power expects to obtain all regulatory approvals by the Company)end of the third quarter 2020.
On May 8, 2019, Alabama Power entered into an Agreement for Engineering, Procurement, and Construction with Mitsubishi Hitachi Power Systems Americas, Inc. and Black & Veatch Construction, Inc. to construct an approximately 720-MW combined cycle facility at Plant Barry (Plant Barry Unit 8), which is expected to be placed in some adjacent areas. service by the end of 2023.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The traditional electric operating companies (includingcapital investment associated with the Company)construction of Plant Barry Unit 8 and Southernthe Autauga Combined Cycle Acquisition is currently estimated to total approximately $1.1 billion.
Alabama Power expectentered into additional long-term PPAs totaling approximately 640 MWs of generating capacity consisting of approximately 240 MWs of combined cycle generation expected to make a compliance filing within 30 days accepting thebegin later in 2020 and approximately 400 MWs of solar generation coupled with battery energy storage systems (solar/battery systems) expected to begin in 2022 through 2024. The terms of the order. Whileagreements for the FERC's February 2, 2017 order referencessolar/battery systems permit Alabama Power to use the marketenergy and retire the associated renewable energy credits (REC) in service of customers or to sell RECs, separately or bundled with energy.
Upon certification, Alabama Power expects to recover costs associated with Plant Barry Unit 8 pursuant to its Rate CNP New Plant. Additionally, Alabama Power expects to recover costs associated with the Autauga Combined Cycle Acquisition through the inclusion in Rate RSE of revenues from the existing power proceeding discussed above, it remains a separate, ongoing matter.sales agreement and, on expiration of that agreement, pursuant to Rate CNP New Plant. The recovery of costs associated with laws, regulations, and other such mandates directed at the utility industry are expected to be recovered through Rate CNP Compliance. Alabama Power expects to recover the capacity-related costs associated with the PPAs through its Rate CNP PPA. In addition, fuel and energy-related costs are expected to be recovered through Rate ECR. Any remaining costs associated with the Autauga Combined Cycle Acquisition and Plant Barry Unit 8 will be incorporated through the annual filing of Rate RSE.
The ultimate outcome of these matters cannot be determined at this time.
Construction Work in Progress Accounting Order
On October 1, 2019, the Alabama PSC acknowledged that Alabama Power would begin certain limited preparatory activities associated with Plant Barry Unit 8 construction to meet the target in-service date by authorizing Alabama Power to record the related costs as CWIP prior to the issuance of an order on the CCN petition. Should a CCN not be granted and Alabama Power does not proceed with the related construction of Plant Barry Unit 8, Alabama Power may transfer those costs and any costs that directly result from the non-issuance of the CCN to a regulatory asset which would be amortized over a five-year period. If the balance of incurred costs reaches 5% of the estimated in-service cost of the total project prior to issuance of an order on the CCN petition, Alabama Power will confer with the Alabama PSC regarding the appropriateness of additional authorization. The Sierra Club subsequently filed a petition for reconsideration of the accounting order. The Alabama PSC voted to deny the petition for reconsideration on January 7, 2020.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
In May 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2019, Alabama Power's equity ratio was approximately 50%.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, during a year without a Rate RSE upward adjustment, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%. During a year


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Retail Regulatory Matterswith a Rate RSE upward adjustment, if Alabama Power's actual WCER exceeds 6.15%, customers receive 50% of the amount between 6.15% and 6.90% and all amounts in excess of an actual WCER of 6.90%.
In conjunction with these modifications to Rate RSE, in May 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and to return $50 million to customers through bill credits in 2019.
On November 27, 2019, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2020. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2020.
During 2019, Alabama Power provided to the Alabama PSC and the Alabama Office of the Attorney General information related to the operation and utilization of Rate RSE, in accordance with the rules governing the operation of Rate RSE. The ultimate outcome of this matter cannot be determined at this time.
At December 31, 2019, Alabama Power's WCER exceeded 6.15%, resulting in Alabama Power establishing a current regulatory liability of $53 million for Rate RSE refunds, which will be refunded to customers through bill credits in April 2020.
Rate CNP New Plant
Rate CNP New Plant allows for recovery of Alabama Power's retail costs associated with newly developed or acquired certificated generating facilities placed into retail service. No adjustments to Rate CNP New Plant occurred during the period 2017 through 2019. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information.
Rate CNP PPA
Rate CNP PPA allows for the recovery of Alabama Power's retail costs associated with certificated PPAs. No adjustments to Rate CNP PPA occurred during the period 2017 through 2019 and no adjustment is expected for 2020.
Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to factors that are calculated and submitted to the Alabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
On November 27, 2019, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the billing month of January 2020.
Rate ECR
Rate ECR recovers Alabama Power's retail energy costs based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed gives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income but will impact operating cash flows. The Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
On December 3, 2019, the Alabama PSC approved a decrease to Rate ECR from 2.353 to 2.160 cents per KWH, equal to 1.82%, or approximately $102 million annually, effective January 1, 2020. The rate will adjust to 5.910 cents per KWH in January 2021 absent a further order from the Alabama PSC.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Tax Reform Accounting Order
In May 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power to apply the remaining deferred balance of approximately $39 million to increase the balance in the NDR. See "Rate NDR" herein and Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Plant Greene County
Alabama Power jointly owns Plant Greene County with an affiliate, Mississippi Power. See Note 5 to the financial statements under "Joint Ownership Agreements" for additional information regarding the joint ownership agreement. On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018 with the Mississippi PSC. The RMP proposed a four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. Mississippi Power's proposed Plant Greene County unit retirements would require the completion of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. Alabama Power will continue to monitor the status of Mississippi Power's proposed RMP and associated regulatory process as well as the proposed transmission and system reliability improvements. Alabama Power will review all the facts and circumstances and will evaluate all its alternatives prior to reaching a final determination on the ongoing operations of Plant Greene County. The ultimate outcome of this matter cannot be determined at this time.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The Company'ssecond component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR enhance Alabama Power's ability to mitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear.
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
On April 15, 2019, Alabama Power retired Plant Gorgas Units 8, 9, and 10 and reclassified approximately $654 million of the unrecovered asset balances to regulatory assets, which are being recovered over the units' remaining useful lives, the latest being through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055. See Note 2 to the financial statements under "Alabama Power" and Note 6 to the financial statements for additional information.
Georgia Power
Georgia Power's revenues from regulated retail operations are collected through various rate mechanisms subject to the oversight of the Georgia PSC. The CompanyGeorgia Power currently recovers its costs from the regulated retail business through the 2013 ARP,an alternate rate plan, which includes traditional base tariff rates,tariffs, Demand-Side Management (DSM) tariffs, the ECCR tariffs,tariff, and Municipal Franchise Fee (MFF) tariffs. In addition, financing costs related to theon certified construction costs of Plant Vogtle Units 3 and 4 are being collected through the NCCR tariff and fuel costs are collected through a separate fuel cost recovery tariffs.tariff. See Note 32 to the financial statements under "Retail Regulatory Matters""Georgia PowerRate Plans," " – Fuel Cost Recovery," and " – Nuclear Construction" for additional information.
Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
MFF12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50%

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC on April 14,in 2016, the 2013 ARP will continuecontinued in effect until December 31, 2019, and the Company will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, the Company and Atlanta Gas Light Company each will retain their respectiveGeorgia Power retained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings applicable to each will be shared on a 60/40 basis with their respective customers; thereafter, all merger savings will be retained by customers. See Note 3
There were no changes to the financial statements under "Retail Regulatory Matters – Rate Plans" for additional information regarding the 2013 ARP.
In accordance with the 2013 ARP, the Georgia PSC approved increases to tariffs effective January 1, 2015 and 2016 as follows: (1)Power's traditional base tariff rates by approximately $107 million and $49 million, respectively; (2)tariffs, ECCR tariff, by approximately $23 million and $75 million, respectively; (3) DSM tariffs, by approximately $3 millionor MFF tariffs in each year; and (4) MFF tariff by approximately $3 million and $13 million, respectively, for a total increase in base revenues of approximately $136 million and $140 million, respectively.2017, 2018, or 2019.
Under the 2013 ARP, the Company'sGeorgia Power's retail ROE iswas set at 10.95% and earnings arewere evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% willwere to be directly refunded to customers, with the remaining one-third retained by Georgia Power. On February 5, 2019, the Company. There will be no recoveryGeorgia PSC approved a settlement between Georgia Power and the staff of any earnings shortfall below 10.00% on an actual basis.the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2014, the Company's2019 and 2018, Georgia Power's retail ROE exceeded 12.00%, and, under the Company refundedmodified sharing mechanism pursuant to retail customersthe 2019 ARP, Georgia Power has reduced regulatory assets by a total of approximately $11$110 million in 2016, as approved by the Georgia PSC on February 18, 2016. In 2015, the Company's retail ROE was within the allowed retail ROE range. In 2016, the Company's retail ROE exceeded 12.00%, and the Company expects to refund a total of approximately $110 million to retail customers, approximately $40 million, subject to review and approval by the Georgia PSC. The ultimate outcome of this matter cannot be determined at this time.
Renewables
In 2014, the Georgia PSC approved the Company's application for the certification of two PPAs executed in 2013 for the purchase of energy from two wind farms in Oklahoma with capacity totaling 250 MWs that began in 2016See "2019 ARP" and have 20-year terms.
As part of the Georgia Power Advanced Solar Initiative (ASI), in 2014, the Georgia PSC approved PPAs executed since April 2015 for the purchase of energy from 555 MWs of solar capacity that began in 2015 and 2016 and have terms ranging from 20 to 30 years. As a result of certain acquisitions by Southern Power, 249 MWs of this contracted capacity is being provided from solar facilities owned by Southern Power through five PPAs that began in 2016. Ownership of any associated renewable energy credits (REC) is specified in each respective PPA. The party that owns the RECs retains the right to use them.
In 2014, the Georgia PSC approved the Company's request to build, own, and operate 30-MW solar generation facilities at three U.S. Army bases and one U.S. Navy base by the end of 2016. One of the four solar generation facilities began commercial operation in December 2015 and the remaining three began in the fourth quarter 2016. In December 2015, the Georgia PSC approved the Company's request to build, own, and operate a 31-MW solar generation facility at a U.S. Marine Corps base that is expected to begin commercial operation by summer 2017 and a 15-MW solar generation facility at a yet-to-be-determined U.S. military base. The ultimate outcome of this matter cannot be determined at this time.
Two PPAs for biomass generation capacity of 58 MWs each were executed in June 2015 and November 2015 and are expected to begin in 2019.
See "Integrated Resource Plan" herein for additional information on renewables.information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Integrated Resource Plan
See "Environmental Matters""Environmental Matters" herein for additional information regarding proposed and final EPA rules and regulations, including the MATS rule for coal- and oil-fired electric utility steam generating units, revisions to effluent limitations guidelinesELG for steam

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

electric power plants and additional regulations of CCR and CO2; and the Company's analysis of the potential costs and benefits of installing the required controls on its fossil generating units in light of these regulations..
On July 28, 2016,16, 2019, the Georgia PSC voted to approve Georgia Power's modified triennial IRP (Georgia Power 2019 IRP). In the Georgia Power 2019 IRP, the Georgia PSC approved the 2016 IRP including the decertification and retirement of Plant MitchellHammond Units 3, 4A, and 4B (2171 through 4 (840 MWs) and Plant KraftMcIntosh Unit 1 (17(142.5 MWs), as well as effective July 29, 2019. In accordance with the decertification2019 ARP, the remaining net book values at December 31, 2019 of the Intercession City unit (143 MWs total capacity). On August 2, 2016,$488 million for the Plant MitchellHammond units are being recovered over a period equal to the respective unit's remaining useful life, which varies between 2024 and Plant Kraft units were retired. On August 31, 2016, the Company sold its 33% ownership interest in the Intercession City unit to Duke Energy Florida, LLC.
Additionally, the Georgia PSC approved the Company's environmental compliance strategy2035, and related expenditures proposed in the 2016 IRP, including measures taken to comply with existing government-imposed environmental mandates, subject to limits on expenditures$30 million for Plant McIntosh Unit 1 and Plant Hammond Units 1 through 4.
The Georgia PSC approved the reclassificationis being recovered over a three-year period ending December 31, 2022. In addition, approximately $20 million of the remaining net book value of Plant Mitchell Unit 3 and costs associated withrelated unusable materials and supplies remaining at the unitinventory balances and approximately $295 million of net capitalized asset retirement datecosts were reclassified to a regulatory asset. Recovery ofIn accordance with the unit's net book value will continue through December 31, 2019, as providedmodifications to the earnings sharing mechanism approved in the 2013 ARP. The timing of2019 ARP, Georgia Power fully amortized the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costsregulatory assets associated with these unusable materials and supplies remaining at the unit retirement date was deferred for consideration in the Company'sinventory

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 base rate case.Annual Report
The Georgia PSC also approved the Renewable Energy Development Initiative to procure an additional 1,200 MWs of renewable resources primarily utilizing market-based prices established through a competitive bidding process with expected in-service dates between 2018 and 2021. Additionally, 200 MWs of self-build capacity for use by the Company was approved,
balances as well as considerationa regulatory asset of approximately $50 million related to costs for no more than 200 MWs of capacity as part of a renewable commercial and industrial program.
The Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear as an option at a future generation site in Stewart County, Georgia. The timing of cost recovery will be determined bySee "Rate Plans – 2019 ARP" herein for additional information.
Also in the Georgia Power 2019 IRP, the Georgia PSC approved Georgia Power's proposed environmental compliance strategy associated with ash pond and certain landfill closures and post-closure care in compliance with the CCR Rule and the related state rule. In the 2019 ARP, the Georgia PSC approved recovery of the estimated under recovered balance of these compliance costs at December 31, 2019 over a three-year period ending December 31, 2022 and recovery of estimated compliance costs for 2020, 2021, and 2022 over three-year periods ending December 31, 2022, 2023, and 2024, respectively, with recovery of construction contingency beginning in the year following actual expenditure. The under recovered balance at December 31, 2019 was $175 million and the estimated compliance costs expected to be incurred in 2020, 2021, and 2022 are $265 million, $290 million, and $390 million, respectively. The ECCR tariff is expected to be revised for actual expenditures and updated estimates through future annual compliance filings. See "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" and FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" and "Contractual Obligations" herein and Note 6 to the financial statements for additional information regarding Georgia Power's AROs.
On February 4, 2020, the Georgia PSC voted to deny a motion for reconsideration filed by the Sierra Club regarding the Georgia PSC's decision in the 2019 ARP allowing Georgia Power to recover compliance costs for CCR AROs.
Additionally, the Georgia PSC rejected a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020 following the expiration of a wholesale PPA. Georgia Power may offer such capacity in the wholesale market or to the retail jurisdiction in a future base rate case. IRP.
The ultimate outcomeGeorgia PSC also approved Georgia Power to (i) issue requests for proposals (RFP) for capacity beginning in 2022 or 2023 and in 2026, 2027, or 2028; (ii) procure up to an additional 2,210 MWs of this matter cannot be determined at this time.renewable resources through competitive RFPs; and (iii) invest in a portfolio of up to 80 MWs of battery energy storage technologies.
Fuel Cost Recovery
The CompanyGeorgia Power has established fuel cost recovery rates approved by the Georgia PSC. In December 2015, the Georgia PSC approved the Company's requestPower is scheduled to lower annual billings by approximately $350 million effective January 1, 2016. On May 17, 2016, the Georgia PSC approved the Company's requestfile its next fuel case no later than March 16, 2020, with new rates, if any, to further lower annual billings by approximately $313 millionbe effective June 1, 2016. On December 6, 2016, the2020. Georgia PSC approved the delay of the Company's next fuel case, which was previously scheduled to be filed by February 28, 2017. The Georgia PSC will review the Company's cumulative over or under recovered fuel balance no later than September 1, 2018 and evaluate the need to file a fuel case unless the Company deems it necessary to file a fuel case at an earlier time. Under an Interim Fuel Rider, the CompanyPower continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million. At December 31, 2019, Georgia Power's over recovered fuel balance was $73 million.
The Company'sGeorgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon effective January 1, 2016.horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on theSouthern Company's or Georgia Power's revenues or net income but will affect operating cash flow.flows.
Storm Damage Recovery
As of December 31, 2016, the balance in the Company's regulatory asset related to storm damage was $206 million. During October 2016, Hurricane Matthew caused significant damage to the Company's transmission and distribution facilities. As of December 31, 2016, the Company had recorded incremental restoration cost related to this hurricane of $121 million, of which approximately $116 million was charged to the storm damage reserve and the remainder was capitalized. The CompanyBeginning January 1, 2020, Georgia Power is accruing $30recovering $213 million annually through December 31, 2019,2022, as provided in the 20132019 ARP, to the storm damage reserve to cover thefor incremental operations and maintenance costs of damagesdamage from major storms to its transmission and distribution facilities, which is recoverable through base rates.facilities. At December 31, 2019, the balance in the regulatory asset related to storm damage was $410 million. The rate of recovery of storm damage costs after December 31, 2019cost recovery is expected to be adjusted in the Company's 2019 base rate case.future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on theSouthern Company's or Georgia Power's financial statements. See Note 12 to the financial statements under "Storm"Georgia PowerStorm Damage Recovery"Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 currently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 to the financial statements for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and Mississippi Power's financial statements.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information regarding infrastructure replacement programs at certain of the natural gas distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(a)Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Programs
The Registrants are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations.
For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the financial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See "Southern Company Gas" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities and certain pipeline construction projects.
See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein for additional information regarding the Company's storm damage reserve.Registrants' capital requirements for their construction programs, including estimated totals for each of the next five years.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

Nuclear Construction
In 2008,2009, the Company, acting for itselfGeorgia PSC certified construction of Plant Vogtle Units 3 and as agent for Oglethorpe4. Georgia Power Corporation (OPC),holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the Municipal Electric AuthorityNRC issued the related combined construction and operating licenses, which allowed full construction of Georgia (MEAG Power), and the City of Dalton, Georgia (Dalton), acting by and through its Board of Water, Light, and Sinking Fund Commissioners, doing business as Dalton Utilities (collectively, Vogtle Owners), entered into an agreement with a consortium consisting of Westinghouse Electric Company LLC (Westinghouse) and Stone & Webster, Inc., which was subsequently acquired by Westinghouse and changed its name to WECTEC Global Project Services Inc. (WECTEC) (Westinghouse and WECTEC, collectively, Contractor), pursuant to which the Contractor agreed to design, engineer, procure, construct, and test two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities atto begin. Until March 2017, construction on Plant Vogtle (VogtleUnits 3 and 4 Agreement).
Under the terms ofcontinued under the Vogtle 3 and 4 Agreement,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Owners agreed to payServices Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a purchase price subject to certain price escalationstime and adjustments, including fixed escalation amountsmaterials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and index-based adjustments, as well as adjustments for change orders, and performance bonuses for early completion and unit performance. Thetesting of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement also provides for liquidated damages upon the Contractor's failure to fulfill the schedule and performance guarantees, subject to an aggregate cap of 10% of the contract price, or approximately $920 million to $930 million. In addition, the Vogtle 3 and 4 Agreement provides for limited cost sharingis terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for Contractoritself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs under certain conditions (which the Company has not been notified have occurred) with maximum additional capital costs under this provision attributableplus a base fee and an at-risk fee, which is subject to the Company (basedadjustment based on the Company's ownership interest) of approximately $114 million.Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (and not(not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to the ContractorBechtel under the Vogtle 3 and 4Bechtel Agreement. The Company's proportionate share is 45.7%. InVogtle Owners may terminate the event of certain credit rating downgrades ofBechtel Agreement at any time for their convenience, provided that the Vogtle Owner, such Vogtle OwnerOwners will be required to provide a letter of credit or other credit enhancement.
Certain obligations of Westinghouse have been guaranteed by Toshiba Corporation (Toshiba), Westinghouse's parent company. Inpay amounts related to work performed prior to the event of certain credit rating downgrades of Toshiba, Westinghouse is required to provide letters of credit or other credit enhancement. In December 2015, Toshiba experienced credit rating downgrades and Westinghouse providedtermination (including the Vogtle Owners with $920 million of letters of credit. These letters of credit remain in place in accordance with the termsapplicable portion of the Vogtle 3base fee), certain termination-related costs, and, 4 Agreement.
On February 14, 2017, Toshiba announced preliminary earnings results for the period ended December 31, 2016, which included a substantial goodwill impairment charge at Westinghouse attributed to increased cost estimates to complete its U.S. nuclear projects, including Plant Vogtle Units 3 and 4. Toshiba also warned that it will likely be in a negative equity position as a resultcertain stages of the charges. Atwork, the same time, Toshiba reaffirmed its commitment to its U.S. nuclear projects with implementation of management changes and increased oversight. An inability or failure by the Contractor to perform its obligations under the Vogtle 3 and 4 Agreement could have a material impact on the construction of Plant Vogtle Units 3 and 4.
Under the termsapplicable portion of the Vogtle 3 and 4 Agreement, the Contractor does not have a right to terminate the Vogtle 3 and 4 Agreement for convenience. The Contractorat-risk fee. Bechtel may terminate the Vogtle 3 and 4Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspension or delayssuspensions of work, action by a governmental authority to permanently stop work, certain breaches of the Vogtle 3 and 4Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. In
See Note 8 to the eventfinancial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of an abandonment of work by the Contractor, the maximum liabilitydefault, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of the Contractor under theremaining estimated capital cost to complete Plant Vogtle Units 3 and 4 Agreementby the expected in-service dates of November 2021 and November 2022, respectively, is increased significantly, but remains subjectas follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to limitations. The Vogtle Ownersthe base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may terminate the Vogtle 3 and 4 Agreement at any time for convenience, provided that the Vogtle Owners will be required to pay certain termination costs.
In 2009,request the Georgia PSC voted to certifyevaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 withwill total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a certified capital costregular basis to incorporate current information available, particularly in the areas of $4.418 billion. commodity installation, system turnovers, and workforce statistics.
In addition, in 2009April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the Georgia PSC approved inclusionregulatory-approved in-service dates of the Plant Vogtle UnitsNovember 2021 for Unit 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows the Company to recover financing costsNovember 2022 for nuclear construction projects certified by the Georgia PSC. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff by including the related CWIP accounts in rate base during the construction period.Unit 4. The Georgia PSC approved an NCCR tariff of $368 million for 2014, as well as increases to the NCCR tariff of approximately $27 million and $19 million effective January 1, 2015 and 2016, respectively.
The Company is required to file semi-annual Vogtle Construction Monitoring (VCM) reportsproject has faced challenges with the Georgia PSC by February 28April 2019 aggressive strategy targets, including, but not limited to, electrical and August 31 each year. In accordance withpipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the 2009 certification order, the Company requested amendments to the Plant Vogtle Units 3 and 4 certificate in both the February 2013 (eighth VCM) and February 2015 (twelfth VCM) filings, when projected construction capital costs to be borne by the Company increased by 5% above the certified costs and estimated in-service dates were extended. In October 2013, the Georgia PSC approved a stipulation (2013 Stipulation) between the Company and the Georgia PSC Staff to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate until the completion of Plant Vogtle Unit 3 or earlier if deemed appropriate by the Georgia PSC and the Company. In April 2015, the Georgia PSC recognized that the certified cost and the 2013 Stipulation did not constitute a cost recovery cap and deemed the amendment2019 aggressive strategy targets. However,


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


requested inSouthern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2015 filing unnecessary2020, Southern Nuclear updated its cost and withdrawn untilschedule forecast, which did not change the completionprojected overall capital cost forecast and confirmed the expected in-service dates of construction of Plant Vogtle Unit 3 consistent with the 2013 Stipulation.
On December 31, 2015, Westinghouse and the Vogtle Owners entered into a definitive settlement agreement (Contractor Settlement Agreement) to resolve disputes between the Vogtle Owners and the Contractor under the Vogtle 3 and 4 Agreement, including litigation that was pending in the U.S. District Court for the Southern District of Georgia (Vogtle Construction Litigation). Effective December 31, 2015, the Company, acting for itself and as agent for the other Vogtle Owners, and the Contractor entered into an amendment to the Vogtle 3 and 4 Agreement to implement the Contractor Settlement Agreement. The Contractor Settlement Agreement and the related amendment to the Vogtle 3 and 4 Agreement (i) restrict the Contractor's ability to seek further increases in the contract price by clarifying and limiting the circumstances that constitute nuclear regulatory changes in law; (ii) provide for enhanced dispute resolution procedures; (iii) revise the guaranteed substantial completion dates to June 30, 2019November 2021 for Unit 3 and June 30, 2020November 2022 for Unit 4; (iv) provide4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that delay liquidated damages will commence ifpursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the nuclear fuel loading date for each unit does not occurunits by December 31, 2018 for Unit 3their regulatory-approved in-service dates.
As construction, including subcontract work, continues and December 31, 2019 for Unit 4;testing and (v) provide thatsystem turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the Company,installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on its ownership interest, will pay tonew technology that only within the Contractor and capitalize tolast few years began initial operation in the project cost approximately $350 million,global nuclear industry at this scale), or regional transmission upgrades, any of which approximately $263 million had been paid as of December 31, 2016. In addition,may require additional labor and/or materials; or other issues could arise and change the Contractor Settlement Agreement provides for the resolution of other open existing items relating to the scope of the project under the Vogtle 3projected schedule and 4 Agreement, including cyber security,for which costs are reflected in the Company's current in-service forecast of $5.440 billion. Further, as part of the settlement and Westinghouse's acquisition of WECTEC: (i) Westinghouse engaged Fluor Enterprises, Inc., a subsidiary of Fluor Corporation, as a new construction subcontractor and (ii) the Vogtle Owners, Chicago Bridge & Iron Co, N.V., and The Shaw Group Inc. entered into mutual releases of any and all claims arising out of events or circumstances in connection with the construction of Plant Vogtle Units 3 and 4 that occurred on or before the date of the Contractor Settlement Agreement. On January 5, 2016, the Vogtle Construction Litigation was dismissed with prejudice.estimated cost.
On December 20, 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving the following prudence matters: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report will be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement is reasonable and prudent and none of the amounts paid or to be paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) financing costs on verified and approved capital costs will be deemed prudent provided they are incurred prior to December 31, 2019 and December 31, 2020 for Plant Vogtle Units 3 and 4, respectively; and (iv) (a) the in-service capital cost forecast will be adjusted to $5.680 billion (Revised Forecast), which includes a contingency of $240 million above the Company's current forecast of $5.440 billion, (b) capital costs incurred up to the Revised Forecast will be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, and (c) the Company would have the burden to show that any capital costs above the Revised Forecast are reasonable and prudent. Under the terms of the Vogtle Cost Settlement Agreement, the certified in-service capital cost for purposes of calculating the NCCR tariff will remain at $4.418 billion. Construction capital costs above $4.418 billion will accrue AFUDC through the date each unit is placed in service. The ROE used to calculate the NCCR tariff was reduced from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016. For purposes of the AFUDC calculation, the ROE on costs between $4.418 billion and $5.440 billion will also be 10.00% and the ROE on any amounts above $5.440 billion would be the Company's average cost of long-term debt. If the Georgia PSC adjusts the Company's ROE rate setting point in a rate case prior to Plant Vogtle Units 3 and 4 being placed into retail rate base, then the ROE for purposes of calculating both the NCCR tariff and AFUDC will likewise be 95 basis points lower than the revised ROE rate setting point. If Plant Vogtle Units 3 and 4 are not placed in service by December 31, 2020, then (i) the ROE for purposes of calculating the NCCR tariff will be reduced an additional 300 basis points, or $8 million per month, and may, at the Georgia PSC's discretion, be accrued to be used for the benefit of customers, until such time as the units are placed in service and (ii) the ROE used to calculate AFUDC will be the Company's average cost of long-term debt.
Under the terms of the Vogtle Cost Settlement Agreement, Plant Vogtle Units 3 and 4 will be placed into retail rate base on December 31, 2020 or when placed in service, whichever is later. The Georgia PSC will determine for retail ratemaking purposes the process of transitioning Plant Vogtle Units 3 and 4 from a construction project to an operating plant no later than the Company's base rate case required to be filed by July 1, 2019.
The Georgia PSC has approved fifteen VCM reports covering the periods through June 30, 2016, including construction capital costs incurred, which through that date totaled $3.7 billion. The Company expects to file the sixteenth VCM report, covering the period from July 1 through December 31, 2016, requesting approval of $222 million of construction capital costs incurred during that period, with the Georgia PSC by February 28, 2017. The Company's CWIP balance for Plant Vogtle Units 3 and 4 was approximately $3.9 billion as of December 31, 2016, and the Company had incurred $1.3 billion in financing costs through December 31, 2016.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

As of December 31, 2016, the Company had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through a loan guarantee agreement between the Company and the DOE and a multi-advance credit facility among the Company, the DOE, and the FFB. See Note 6 to the financial statements under "DOE Loan Guarantee Borrowings" for additional information, including applicable covenants, events of default, and mandatory prepayment events.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise as construction proceeds.arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolutionsubmittal by Southern Nuclear of Inspections, Tests, Analyses, and Acceptance Criteriathe ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, as construction proceeds, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs eitherof approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners or the Contractor orentered into an amendment to both.
In addition to Toshiba's reaffirmation of its commitment, the Contractor provided the Company with revised forecasted in-service dates of December 2019 and September 2020 for Plant Vogtle Units 3 and 4, respectively. The Company is currently reviewing a preliminary summary schedule supporting these dates that ultimately must be reconciled to a detailed integrated project schedule. As construction continues, the risk remains that challenges with Contractor performance including labor productivity, fabrication, delivery, assembly, and installation of plant systems, structures, and components, or other issues could arise and may further impact project schedule and cost. The Company expects the Contractor to employ mitigation efforts and believes the Contractor is responsible for any related costs under the Vogtle 3 and 4 Agreement. The Company estimates its financing coststheir joint ownership agreements for Plant Vogtle Units 3 and 4 to be approximately $30 million per month,provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with total construction period financing coststhe November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of approximately $2.5 billion. Additionally, the Company estimates its owner's costs to be approximately $6 million per month, netGeorgia Power and/or Southern Nuclear as agent, except in cases of delay liquidated damages.willful misconduct.
The revised forecasted in-service dates are within the timeframe contemplatedAs a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Cost Settlement AgreementUnits 3 and would enable both units4 were required to qualify for production tax creditsvote to continue construction. In September 2018, the IRS has allocatedVogtle Owners unanimously voted to eachcontinue construction of Plant Vogtle Units 3 and 4.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 which requireunder certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the applicable unit to be placed in service before 2021. The net present valueprovisions of the production tax credits is estimated at approximately $400 million per unit.
Future claims byMEAG Term Sheet. On February 18, 2019, Georgia Power, the Contractor orother Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Company (on behalfVogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owners) could arise throughout construction. These claims may be resolved through formal and informal dispute resolution procedures under the Vogtle 3 and 4 Agreement and, under the enhanced dispute resolution procedures, may be resolved through litigation after the completion of nuclear fuel load for both units.Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.
The ultimate outcome of these matters cannot be determined at this time.
Southern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 2019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure. In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Rate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in two significant pipeline construction projects within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approval.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was no impairment as of December 31, 2019.
See Notes 3 and 7 to the financial statements under "Guarantees" and "Southern Company GasEquity Method Investments," respectively, for additional information on these pipeline projects.
Southern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Bonus DepreciationConsolidated Income Taxes
On behalf of the Registrants, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In December 2015,accordance with IRS regulations, each company is jointly and severally liable for the Protecting Americans from federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect each Registrant's ability to utilize certain tax credits. See "Tax Hikes (PATH) ActCredits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 10 to the financial statements for additional information.
Federal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law. law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to 21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the subsequent tax year. The projected reduction of Southern Company's consolidated income tax liability resulting from the tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and Note 10 to the financial statements for information on Southern Company's joint consolidated income tax allocation agreement.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Bonus depreciation was extended for qualified propertyDepreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service through 2020. The PATH Act allowsafter September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension ofBased on provisional estimates, bonus depreciation included in the PATH Act is expected to result in approximately $300 million of positive cash flows for the 2016 tax year and approximately $210 million for the 2017 tax year. Registrants as follows:
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Cash flows resulting from bonus depreciation for Southern Power would also be impacted by Southern Power's use of tax equity partnerships.
See Note 510 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
OtherTax Credits
The Tax Reform Legislation retained solar energy incentives of 30% ITC for projects that commenced construction by December 31, 2019; 26% ITC for projects that commence construction in 2020; 22% ITC for projects that commence construction in 2021; and a permanent 10% ITC for projects that commence construction on or after January 1, 2022. In addition, the Tax Reform Legislation retained wind energy incentives of 100% PTC for projects that commenced construction in 2016; 80% PTC for projects that commenced construction in 2017; 60% PTC for projects that commenced construction in 2018; and 40% PTC for projects that commenced construction in 2019. As a result of a tax extenders bill passed in December 2019, projects that begin construction in 2020 will be entitled to 60% PTC. Projects commencing construction after 2020 will not be entitled to any PTCs. Southern Company has received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power.
Southern Power's ITCs relate to its investment in new solar facilities acquired or constructed and its PTCs relate to the first 10 years of energy production from its wind facilities, which have had, and may continue to have, a material impact on Southern Power's cash flows and net income. At December 31, 2019, Southern Company and Southern Power had approximately $1.8 billion and $1.4 billion, respectively, of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2024, but could be further delayed. Since 2018, Southern Power has been utilizing tax equity partnerships for wind and solar projects, where the tax partner takes significantly all of the respective federal tax benefits. These tax equity partnerships are consolidated in Southern Company's and Southern Power's financial statements using the HLBV methodology to allocate partnership gains and losses. See Note 1 to the financial statements under "General" for additional information on the HLBV methodology and Note 1 to the financial statements under "Income Taxes" and Note 10 to the financial statements under "Deferred Tax Assets and LiabilitiesTax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax benefit related to associated basis differences.
General Litigation Matters
The Company isRegistrants are involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, the Company is subject to certain claims and legal actions arising in the ordinary course of business. The Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements, such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

The ultimate outcome of such pending or potential litigation or regulatory matters against the Companyeach Registrant and any subsidiaries cannot be predicteddetermined at this time; however, for current proceedings not specifically reported herein or in NoteNotes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company'ssuch Registrant's financial statements. See NoteNotes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
The Registrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company regularly evaluatesand Subsidiary Companies 2019 Annual Report

Southern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its operationsofficers, and costs. Primarilycertain former Mississippi Power officers in responsethe U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to changing customer expectationsdismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and payment patterns, including electronic paymentsMississippi Power and alternative payment locations,dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and on-going effortsdenied a motion to increase overall operating efficiencies,certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, initiatedcertain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost containment activities throughoutand schedule. Further, the enterprisecomplaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in July 2016, includingbringing the closurelawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of 104 local officesany dispositive motions or any settlement, whichever is earlier, in the securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and an employee attrition plan affecting approximately 300 positions. Chargescertain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost containment activities didand failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and three members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included four additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Other Matters
Southern Company
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows. See Note 1 to the financial statements under "Leveraged Leases" for additional information.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not return to service by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has two other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million at December 31, 2019.
The ultimate outcome of these matters cannot be determined at this time, but could have a material impact on the Company's resultsfinancial statements of operations, financial position, or cash flows. The cost containment activities are expected to reduce operating costs in 2017.Southern Company and Southern Company Gas.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Company prepares itsRegistrants prepare their financial statements in accordance with GAAP. Significant accounting policies are described in Note 1the notes to the financial statements. In the application of these policies, certain estimates are made that may have a material impact

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

on the Company's results of operations and related disclosures.disclosures of the applicable Registrants (as indicated in the section descriptions herein). Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The Company istraditional electric operating companies and the natural gas distribution utilities are subject to retail regulation by the Georgia PSCtheir respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the FERC. These regulatory agencies set the rates the Company istraditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs.costs, including a reasonable ROE. As a result, the Company appliestraditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on the Company'sfor rate regulated entities also impacts their financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the Company;traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the Company's results of operations and financial condition of the applicable Registrants than they would on a non-regulated company.
Revenues related to regulated utility operations as a percentage of total operating revenues in 2019 for the applicable Registrants were as follows: 87% for Southern Company, 99% for Alabama Power, 97% for Georgia Power, 100% for Mississippi Power, and 80% for Southern Company Gas.
As reflected in Note 12 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the financial statements of the applicable Registrants.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
(Southern Company and Georgia Power)
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In 2017, the Georgia PSC approved Georgia Power's seventeenth VCM report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for Unit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion, respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the base capital cost forecast in the nineteenth VCM report. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However, Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as well as the potential impact on results of operations and cash flows, Southern Company and Georgia Power consider these items to be critical accounting estimates. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information.
Accounting for Income Taxes (Southern Company, Mississippi Power, Southern Power, and Southern Company Gas)
The consolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the various states in which the Southern Company system operates.
On behalf of its subsidiaries, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited or utilized at the consolidated or combined level resulting in NOL and tax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and tax credit carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of Southern Company's and its subsidiaries' current financial statements.position and results of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on the financial statements of the applicable Registrants.
Given the significant judgment involved in estimating NOL and tax credit carryforwards and multi-state apportionments for all subsidiaries, the applicable Registrants consider deferred income tax liabilities and assets to be critical accounting estimates.
Asset Retirement Obligations (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
AROs are computed as the fairpresent value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liabilityARO liabilities for AROsthe traditional electric operating companies primarily relatesrelate to facilities that are subject to the CCR Rule and the related state rules, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of the Company's nuclear facilities which include the Company's(Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2, and facilities that are subject to the CCR Rule, principally ash ponds. In addition, the Company has retirement obligations2). The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and asbestos removal. sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and for Mississippi Power, mine reclamation and water wells.
The traditional electric operating companies and Southern Company Gas also hashave identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, includingcertain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers;transformers, leasehold improvements;improvements, equipment on customer property;property, and property associated with the Company'sSouthern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

assets have not been recorded because the settlement timing for thecertain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROsretirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

The Company previously recorded AROs as a result of state requirements in Georgia which closely align with the requirements of the CCR Rule discussed above. The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. As further analysis is performed, including evaluation ofand the expected method of compliance, refinement of assumptions underlying therelated state rules. The traditional electric operating companies expect to update their ARO cost estimates suchperiodically as additional information related to these assumptions becomes available. See Note 6 to the quantities of CCR at each site, and the determination of timing with respectfinancial statements for additional information, including increases to compliance activities, including the potential for closingAROs related to ash ponds prior to the end of their currently anticipated useful life, the Company expects to continue to periodically update these estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Coal Combustion Residuals" herein for additional information.recorded during 2019 by certain Registrants.
Given the significant judgment involved in estimating AROs, the Company considersapplicable Registrants consider the liabilities for AROs to be critical accounting estimates.
See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" and "Nuclear Decommissioning" for additional information.
Pension and Other Postretirement Benefits (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The Company's calculationapplicable Registrants' calculations of pension and other postretirement benefits expense isare dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term rate of return (LRR) on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the Company believes thatapplicable Registrants believe the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect itstheir pension and other postretirement benefitsbenefit costs and obligations.
Key elements in determining the Company'sapplicable Registrants' pension and other postretirement benefit expense are the expected long-term return on plan assetsLRR and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on the Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. The Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to the Company's target asset allocation. For purposes of determining its liabilitythe applicable Registrants' liabilities related to the pension and other postretirement benefit plans, theSouthern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. For 2015The discount rate assumption impacts both the service cost and prior years,non-service costs components of net periodic benefit costs as well as the Company computed the interest cost component of its net periodicprojected benefit obligations.
The LRR on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations that consider external actuarial advice, and represents the average rate of earnings expected over the long term on the assets invested to provide for anticipated future benefit payments. Southern Company determines the amount of the expected return on plan assets component of non-service costs by applying the LRR of various asset classes to Southern Company's target asset allocation. The LRR only impacts the non-service costs component of net periodic benefit costs for the following year and is set annually at the beginning of the year.
For 2019, the LRR assumption for qualified pension plan assets was reduced from 7.95% to 7.75% for purposes of determining net periodic pension expense usingas a result of changes in the same single-point discount rate. For 2016,economic outlook used in estimating the Company adopted a full yield curve approach for calculating the interest cost component whereby the discount rate for each year is applied to the liability for that specific year.expected returns as of December 31, 2018. As a result of the interest costdecrease in the LRR, the non-service costs component of net periodic pension expense increased by $24 million for the Southern Company system in 2019. See the table below for the impact on each Registrant.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and other postretirement benefit planSubsidiary Companies 2019 Annual Report

For 2020, net periodic pension expense decreasedwill be impacted by approximately $35 million in 2016.
A 25 basis pointtwo factors: a change in the approach used to determine the LRR assumption and cash contributions totaling $1.1 billion to the qualified pension plan made in December 2019. Historically, Southern Company has set the LRR assumption using asset return modeling based on geometric returns that reflect the compound average returns for dependent annual periods. Beginning in 2020, Southern Company will set the LRR assumption using an arithmetic mean which represents the expected simple average return to be earned by the pension plan assets over any significantone year. Southern Company believes the use of the arithmetic mean is more compatible with the LRR's function of estimating a single year's investment return. Excluding the additional pension contribution in December 2019, the change in the LRR assumption (discountwill reduce the non-service costs component of net periodic pension expense by $78 million for the Southern Company system in 2020. See the table below for the impact on each Registrant. The contributions in 2019 will further reduce expense by $88 million for the Southern Company system in 2020.
 Southern Company
Alabama
Power
Georgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Increase (decrease) in pension expense:   
2019$24
$5
$8
$1
$2
2020(78)(18)(25)(4)(7)
The following table illustrates the sensitivity to changes in the applicable Registrants' long-term assumptions with respect to the discount rate, salaries, orsalary increases, and the long-term rate of return on plan assets) would result in a $10 million or less change in total annual benefit expense and a $147 million or less change in projected obligations.assets:
Increase/(Decrease) in
25 Basis Point Change in:Total Benefit Expense for 2020Projected Obligation for Pension Plan at December 31, 2019
Projected Obligation for
Other Postretirement
Benefit Plans at December 31, 2019
(in millions)
Discount rate:
Southern Company$41/$(39)$549/$(518)$57/$(54)
Alabama Power$10/$(10)$131/$(123)$14/$(13)
Georgia Power$12/$(11)$166/$(156)$21/$(20)
Mississippi Power$2/$(2)$25/$(23)$2/$(2)
Southern Company Gas$1/$(1)$38/$(36)$6/$(6)
Salaries:
Southern Company$23/$(22)$118/$(113)$–/$–
Alabama Power$6/$(6)$33/$(32)$–/$–
Georgia Power$6/$(6)$34/$(33)$–/$–
Mississippi Power$1/$(1)$5/$(5)$–/$–
Southern Company Gas$1/$(1)$3/$(3)$–/$–
Long-term return on plan assets:
Southern Company$35/$(35)N/AN/A
Alabama Power$9/$(9)N/AN/A
Georgia Power$11/$(11)N/AN/A
Mississippi Power$2/$(2)N/AN/A
Southern Company Gas$3/$(3)N/AN/A
See Note 211 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Asset Impairment (Southern Company, Southern Power, and Southern Company Gas)
Goodwill (Southern Company and Southern Company Gas)
The acquisition method of accounting requires the assets acquired and liabilities assumed to be recorded at the date of acquisition at their respective estimated fair values. The applicable Registrants have recognized goodwill as of the date of their acquisitions, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the fourth quarter of the year as well as on an interim basis as events and changes in circumstances occur, including, but not limited to, a significant change in operating performance, the business climate, legal or regulatory factors, or a planned sale or disposition of a significant portion of the business. A reporting unit is the operating segment, or a business one level below the operating segment (a component), if discrete financial information is prepared and regularly reviewed by management. Components are aggregated if they have similar economic characteristics.
As part of the impairment tests, the applicable Registrant may perform an initial qualitative assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount before applying the quantitative goodwill impairment test. If the applicable Registrant elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If the applicable Registrant determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it compares the fair value of the reporting unit to its carrying value to determine if the fair value is greater than its carrying value.
Goodwill for Southern Company and Southern Company Gas was $5.3 billion and $5.0 billion, respectively, at December 31, 2019. For its 2019 and 2018 annual impairment tests, Southern Company Gas performed the qualitative assessment and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For its 2017 annual impairment test, Southern Company Gas performed the quantitative assessment, which resulted in the fair value of all of its reporting units that have goodwill exceeding their carrying value. For its annual impairment tests for PowerSecure, Southern Company performed the quantitative assessment, which resulted in the fair value of goodwill at PowerSecure exceeding its carrying value in all years presented. However, Southern Company recorded goodwill impairment charges totaling $34 million in 2019 as a result of its decision to sell certain PowerSecure business units. See Note 15 to the financial statements under "Southern Company" for additional information.
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can significantly impact the applicable Registrant's results of operations. Fair values and useful lives are determined based on, among other factors, the expected future period of benefit of the asset, the various characteristics of the asset, and projected cash flows. As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 1 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities" for additional information regarding the applicable Registrants' goodwill.
Long-Lived Assets (Southern Company, Southern Power, and Southern Company Gas)
Impairments of long-lived assets of the traditional electric utilities and natural gas distribution utilities are generally related to specific regulatory disallowances. The applicable Registrants assess their other long-lived assets for impairment whenever events or changes in circumstances indicate that an asset's carrying amount may not be recoverable. If an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of the undiscounted expected future cash flows directly attributable to the asset's use and eventual disposition. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determined and a loss is recorded equal to the difference between the carrying value and the fair value of the asset. In addition, when assets are identified as held for sale, an impairment loss is recognized to the extent the carrying value of the assets or asset group exceeds their fair value less cost to sell. A high degree of judgment is required in developing estimates related to these evaluations, which are based on projections of various factors, some of which have been quite volatile in recent years.
Southern Power's investments in long-lived assets are primarily generation assets, whether in service or under construction. Excluding the natural gas distribution utilities, Southern Company Gas' investments in long-lived assets are primarily natural gas transportation and storage facility assets, whether in service or under construction. In addition, exclusive of the traditional electric operating companies and natural gas distribution utilities, Southern Company's investments in long-lived assets also include investments in leveraged leases.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

For Southern Power, examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to remarket generating capacity for an extended period, the unplanned termination of a customer contract or the inability of a customer to perform under the terms of the contract, or the inability to deploy wind turbine equipment to a development project. For Southern Company Gas, examples of impairment indicators could include, but are not limited to, significant changes in the U.S. natural gas storage market, construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to renew or extend customer contracts or the inability of a customer to perform under the terms of the contract, attrition rates, or the inability to deploy a development project. For Southern Company's investments in leveraged leases, impairment indicators include changes in estimates of future rental payments to be received under the lease as well as the residual value of the leased asset at the end of the lease.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 3 to the financial statements under "Other Matters" and Note 15 to the financial statements for information on certain assets recently evaluated for impairment.
Derivatives and Hedging Activities (Southern Company and Southern Company Gas)
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in the applicable Registrant's assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value of derivative instruments may change significantly from period to period depending upon market conditions, and changes in hedge effectiveness may impact the accounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. If the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempt from fair value accounting treatment and is, instead, subject to traditional accrual accounting. The applicable Registrant utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI on the balance sheets until the hedged transaction affects earnings in the case of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as document and assess the effectiveness of derivatives associated with transactions that receive hedge accounting treatment.
Southern Company Gas uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and, to a lesser extent, Southern Company Gas hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that Southern Company Gas would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
Derivative assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of nonperformance risk on liabilities.
A significant change in the underlying market prices or pricing assumptions used in pricing derivative assets or liabilities may result in a significant financial statement impact.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Given the assumptions used in pricing the derivative asset or liability, Southern Company and Southern Company Gas consider the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Note 14 to the financial statements for more information.
Revenue Recognition (Southern Power)
Southern Power's power sale transactions, which include PPAs, are classified in one of four general categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges, as described further below. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 14 to the financial statements. Southern Power's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
Southern Power considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;
Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the counterparty substantially all of the economic benefits and the right to direct the use of the asset.
If the contract meets the above criteria for a lease, Southern Power performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of Southern Power's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in Southern Power's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered. See Note 9 to the financial statements for additional information.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, Southern Power further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within Southern Power's available generating capacity) are accounted for as executory contracts. For contracts that have a capacity charge, the revenue is generally recognized in the period that it becomes billable. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. See Note 4 to the financial statements for additional information.
Cash Flow Hedge Transactions
Southern Power further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and
Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Derivative (Non-Hedge) Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Acquisition Accounting (Southern Power)
Southern Power may acquire generation assets as part of its overall growth strategy. At the time of an acquisition, Southern Power will assess if these assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, the purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets, primarily related to acquired PPAs). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired.
Determining the fair value of assets acquired and liabilities assumed requires management judgment and Southern Power may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions, and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by Southern Power for potential or successful acquisitions are expensed as incurred.
Contingent consideration primarily relates to fixed amounts due to the seller once the facility is placed in service. For contingent consideration with variable payments, Southern Power fair values the arrangement with any changes recorded in the consolidated statements of income. See Note 13 to the financial statements for additional fair value information and Note 15 to the financial statements for additional information on recent acquisitions.
Variable Interest Entities (Southern Power)
Southern Power enters into partnerships with varying ownership structures. Upon entering into such arrangements, membership interests and other variable interests are evaluated to determine if the legal entity is a VIE. If the legal entity is a VIE, Southern Power will assess if it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE, making it the primary beneficiary. Making this determination may require significant management judgment.
If Southern Power is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. If Southern Power is not the primary beneficiary, the legal entity is generally accounted for under the equity method of accounting. Southern Power reconsiders its conclusions as to whether the legal entity is a VIE and whether it is the primary beneficiary for events that impact the rights of variable interests, such as ownership changes in membership interests.
Southern Power has partial ownership in certain legal entities for which the contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits are not based on fixed ownership percentages. For these arrangements, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period.
Contingent Obligations (All Registrants)
The Registrants are subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject itthem to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and NoteNotes 2 and 3 to the financial statements for more information regarding certain of these contingencies. The CompanyRegistrants periodically evaluates itsevaluate their exposure to such risks and recordsrecord reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect the Company's results of operations, cash flows, or financial condition.condition of the Registrants.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalentSee Note 1 to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognitionfinancial statements under "Recently Adopted Accounting Standards" for such sales.additional information.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it is expected to have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02unchanged and there is effectiveno change to the accounting for fiscal years beginning after December 15, 2018, with early adoption permitted.existing leveraged leases. The Company is currently evaluatingRegistrants adopted the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company.2019. See Notes 5, 8, and 12Note 9 to the financial statements for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of currentadditional information and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.related disclosures.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

FINANCIAL CONDITION AND LIQUIDITY
Overview
The Company's financial condition of each Registrant remained stable at December 31, 2016.2019. The Company'sRegistrants' cash requirements primarily consist of funding ongoing operations, including unconsolidated subsidiaries, as well as common stock dividends, capital expenditures, and debt maturities. Southern Power's cash requirements also include distributions to noncontrolling interests. Capital expenditures and other investing activities for the traditional electric operating companies include investments to meet projected long-term demand requirements, including to build new generation facilities, including Plant Vogtle Units 3 and 4, to maintain

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Southern Power's capital expenditures and other investing activities may include acquisitions or new construction associated with its overall growth strategy and to maintain its existing generation fleet's performance. Southern Company Gas' capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations.
Operating cash flows provide a substantial portion of the Company'sRegistrants' cash needs. During 2019, Southern Power utilized tax credits, which provided $734 million in operating cash flows. For the three-year period from 20172020 through 2019, the Company's2022, each Registrant's projected common stock dividends, capital expenditures, and debt maturities, as well as distributions to noncontrolling interests for Southern Power, are expected to exceed its operating cash flows. TheSouthern Company plans to finance future cash needs in excess of its operating cash flows primarily through securities issuances, capital contributions from Southern Company,by accessing borrowings from financial institutions and issuing debt and hybrid securities in the capital markets. Each Subsidiary Registrant plans to finance its future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings through the FFB.FFB and Southern Power plans to utilize tax equity partnership contributions. The Company intendsRegistrants plan to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs and continue to monitor itstheir access to short-term and long-term capital markets as well as their bank credit arrangements to meet future capital and liquidity needs. See "Sources"Sources of Capital," "Financing"Financing Activities," "Capital Requirements," and "Capital Requirements and "Contractual Obligations"Obligations" herein for additional information.
The Company'sRegistrants' investments in thetheir qualified pension planplans and Alabama Power's and Georgia Power's investments in their nuclear decommissioning trust funds increased in value as ofat December 31, 20162019 as compared to December 31, 2015. On2018. In December 19, 2016,2019, the CompanyRegistrants voluntarily contributed $287 millionthe following amounts to the qualified pension plan. plan:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Contributions to qualified pension plan$1,136
$362
$200
$54
$24
$145
No mandatory contributions to the qualified pension planplans are anticipated during 2017. The Company also funded approximately $5 million to its nuclear decommissioning trust funds in 2016.2020. See "Contractual Obligations""Contractual Obligations" herein and Notes 16 and 211 to the financial statements under "Nuclear Decommissioning""Nuclear Decommissioning" and "Pension"Pension Plans," respectively, for additional information.
At the end of 2019, the market price of Southern Company's common stock was $63.70 per share (based on the closing price as reported on the NYSE) and the book value was $26.11 per share, representing a market-to-book value ratio of 244%, compared to $43.92, $23.91, and 184%, respectively, at the end of 2018.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Analysis of Cash Flows
Net cash flows provided from (used for) operating, activities totaled $2.4 billion in 2016, a decrease of $92 million from 2015, primarily due to the voluntary contribution to the qualified pension plan, partially offset by the timing of vendor payments. Net cash provided from operating activities totaled $2.5 billion in 2015, an increase of $154 million from 2014, primarily due to increased fuel cost recovery, partially offset by the timing of vendor payments.
Net cash used for investing, activities totaled $2.3 billion, $1.9 billion, and $2.2 billion in 2016, 2015, and 2014, respectively, due to gross property additions primarily related to installation of equipment to comply with environmental standards; construction of generation, transmission, and distribution facilities; and purchase of nuclear fuel. The majority of funds needed for gross property additions for the last several years has been provided from operating activities, capital contributions from Southern Company, and the issuance of debt. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Nuclear Construction" herein for additional information.
Net cash used for financing activities totaled $142 million, $530 million,in 2019 and $163 million for 2016, 2015, and 2014, respectively. The decrease2018 are presented in cash used in 2016 compared to 2015 was primarily due to higher capital contributions from Southern Company, a decrease in redemptions and maturities of senior notes, and an increase in short-term debt, partially offset by higher common stock dividends and a decrease in borrowings from the FFB for construction of Plant Vogtle Units 3 and 4. The increase in cash used in 2015 compared to 2014 was primarily due to the redemption and maturity of senior notes in 2015. following table:
Net cash provided from (used for):Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Operating activities$5,781
$1,779
$2,907
$339
$1,385
$1,067
Investing activities(3,392)(1,963)(3,885)(263)(167)(1,386)
Financing activities(1,930)765
918
(83)(1,120)298
       
2018      
Operating activities$6,945
$1,881
$2,769
$804
$631
$764
Investing activities(5,760)(2,289)(3,109)(232)(227)998
Financing activities(1,813)177
(400)(527)(363)(1,770)
Fluctuations in cash flowflows from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Significant balance sheet changes
Southern Company
Net cash provided from operating activities decreased $1.2 billion in 2016 included an increase2019 as compared to 2018 primarily due to the voluntary contribution to the qualified pension plan and the timing of vendor payments.
The net cash used for investing activities in property, plant,2019 and equipment2018 was primarily due to the traditional electric operating companies' construction of $1.6 billionelectric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, and capital expenditures for Southern Company Gas' infrastructure replacement programs, partially offset by proceeds from the sale transactions described in Note 15 to the financial statements, which totaled $5.1 billion and $3.0 billion in 2019 and 2018, respectively.
The net cash used for financing activities in 2019 was primarily due to common stock dividend payments and net repayments of short-term bank debt and commercial paper, partially offset by net issuances of long-term debt and the issuance of common stock. The net cash used for financing activities in 2018 was primarily due to net redemptions and repurchases of long-term debt, common stock dividend payments, and a decrease in commercial paper borrowings, partially offset by net issuances of short-term bank debt, proceeds from Southern Power's sales of non-controlling equity interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities, and the issuance of common stock.
Alabama Power
Net cash provided from operating activities decreased $102 million in 2019 as compared to 2018primarily due to the voluntary contribution to the qualified pension plan, partially offset by the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and increased fuel cost recovery.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and a long-term debt issuance, partially offset by payments of common stock dividends and a maturity of long-term debt. The net cash provided from financing activities in 2018 was primarily due to issuances of long-term debt and additional capital contributions from Southern Company, partially offset by the payment of common stock dividends and a maturity of long-term debt.
Georgia Power
Net cash provided from operating activities increased $138 million in 2019 as compared to 2018 primarily due to lower customer refunds and increased fuel cost recovery, partially offset by the voluntary contribution to the qualified pension plan.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions, including a total of $2.5 billion related to the construction of Plant Vogtle Units 3 and 4. See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein for additional information on construction of Plant Vogtle Units 3 and 4.
The net cash provided from financing activities in 2019 was primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, capital contributions from Southern Company, and pollution control revenue bonds reoffered to the public, partially offset by payment of common stock dividends and the maturity of senior notes. The net cash used for financing activities in 2018 was primarily due to the redemption and repurchase of senior notes, payment of common stock dividends, and pollution control revenue bond repurchases, partially offset by capital contributions from Southern Company.
Mississippi Power
Net cash provided from operating activities decreased $465 million in 2019 as compared to 2018 primarily due to higher income tax refunds in 2018 as a result of the tax impact of the abandonment of the Kemper IGCC and the voluntary contribution to the qualified pension plan in 2019.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash used for financing activities in 2019 was primarily due to a return of capital to Southern Company and the redemption of senior notes, partially offset by capital contributions from Southern Company and pollution control revenue bonds reoffered to the public. The net cash used for financing activities in 2018 was primarily due to the redemption of preferred stock, long-term bank debt, short-term borrowings, and senior notes, partially offset by the issuance of senior notes and short-term borrowings.
Southern Power
Net cash provided from operating activities increased $754 million in 2019 as compared to 2018 primarily due to the utilization of federal ITCs totaling $734 million in 2019. At December 31, 2019, Southern Power had $1.4 billion of unutilized ITCs and PTCs which are expected to be fully utilized by 2024. See FUTURE EARNINGS POTENTIAL – "Income Tax MattersTax Credits" herein for additional information.
The net cash used for investing activities in 2019 was primarily due to Southern Power's investment in DSGP and ongoing construction activities, largely offset by proceeds from the sales of Plant Nacogdoches and certain wind turbine equipment. The net cash used for investing activities in 2018 was primarily due to the construction of generating facilities and payments for renewable acquisitions, partially offset by proceeds from the disposition of the Florida Plants. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions" and "Construction Programs" herein and Note 15 to the financial statements for additional information.
The net cash used for financing activities in 2019 was primarily due to returns of capital to Southern Company, the repayment at maturity of senior notes, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by proceeds from net issuances of commercial paper. The net cash used for financing activities in 2018 was primarily due to returns of capital to Southern Company, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by capital contributions from noncontrolling interests.
Southern Company Gas
Net cash provided from operating activities increased $303 million in 2019 as compared to 2018 primarily due to the timing of collection of customer receivables and lower income tax payments, partially offset by the timing of vendor payments and the voluntary contribution to the qualified pension plan.
The net cash used for investing activities in 2019 was primarily due to gross property additions related to utility capital expenditures and infrastructure investments recovered through replacement programs at gas distribution operations and capital contributed to equity method pipeline investments, partially offset by proceeds from the sale of Triton and capital distributions in excess of earnings from equity method pipeline investments. The net cash provided from investing activities in 2018 was primarily due to proceeds from the Southern Company Gas Dispositions, partially offset by gross property additions primarily related to utility capital expenditures and pre-approved rider and infrastructure investments recovered through replacement programs at gas distribution operations as well as net capital contributions to equity method pipeline investments.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and proceeds from the issuance of first mortgage bonds, partially offset by the redemption of long-term debt and payments of common stock dividends. The net cash used for financing activities in 2018 was primarily due to payments of common stock dividends to

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company, return of capital to Southern Company, redemptions of gas facility revenue bonds and senior notes, and repayments of commercial paper borrowings and long-term debt, partially offset by debt issuances and capital contributions from Southern Company.
Significant Balance Sheet Changes
Southern Company
Significant balance sheet changes in 2019 for Southern Company included:
decreases in assets and liabilities held for sale of $5.0 billion and $3.3 billion, respectively, and an increase of $2.7 billion in total stockholders' equity primarily related to the sale of Gulf Power;
an increase of $2.3 billion in total property, plant, and equipment primarily related to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, increasesincluding installation of equipment to comply with environmental standards, net of $1.2 billion and $1.0 billion reclassified to other regulatory assets and regulatory assets associated with AROs, respectively, as a result of generating unit retirements at Alabama Power and Georgia Power;
an increase in other regulatory assets deferred of $622 million and current and deferred ARO liabilities of $616 million$1.8 billion primarily related to changesthe $1.2 billion reclassification from property, plant, and equipment discussed above and a $0.8 billion increase in ash pond closure strategy, regulatory assets associated with retiree benefit plans primarily resulting from a decrease in the overall discount rate used to calculate benefit obligations;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.8 billion, recorded upon the adoption of ASC 842;
an increase of $373 million$1.4 billion in regulatory assets associated with AROs primarily related to the $1.0 billion reclassification from property, plant, and equipment discussed above and ARO revisions at Alabama Power and Mississippi Power related to the CCR Rule;
an increase of $1.3 billion in accumulated deferred income taxes primarily related to the expected utilization of tax credit carryforwards in the 2019 tax year as a result of bonus depreciation,increased taxable income from the sale of Gulf Power; and an increase
a decrease of $357 million$0.9 billion in long-termnotes payable related to net repayments of short-term bank debt due to issuances exceeding maturities. and commercial paper.
See Note 1Notes 2, 5, 6, 8, 9, 10, 11, and 15 to the financial statements for additional information.
The Company's ratio
Alabama Power
Significant balance sheet changes in 2019 for Alabama Power included:
an increase of $1.5 billion in total common stockholder's equity primarily due to total capitalization plus short-term debt, was 50.0% at December 31, 2016a $1.2 billion capital contribution from Southern Company;
increases of $0.9 billion in regulatory assets associated with AROs and 49.9% at December 31, 2015. $0.7 billion in other regulatory assets, deferred primarily due to the impacts of retiring and reclassifying Plant Gorgas Units 8, 9, and 10;
an increase of $0.6 billion in cash and cash equivalents; and
an increase of $0.3 billion in AROs, deferred primarily due to an increase in the ARO estimate related to ash pond facilities.
See NoteNotes 2 and 6 to the financial statements for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power
Significant balance sheet changes in 2019 for Georgia Power included:
an increase of $1.8 billion in long-term debt (including securities due within one year) primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, and pollution control revenue bonds being reoffered to the public;
an increase of $1.6 billion in property, plant, and equipment to comply with environmental standards and the construction of generation, transmission, and distribution facilities, net of approximately $0.8 billion reclassified to regulatory assets due to the retirement of certain generating units as approved in the Georgia Power 2019 IRP;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.4 billion, recorded upon the adoption of ASC 842;
an increase of $1.2 billion in regulatory assets primarily due to the $0.8 billion reclassification from property, plant, and equipment discussed above and $0.2 billion associated with retiree benefit plans primarily as a result of a decrease in the overall discount rate used to calculate benefit obligations; and
an increase of $742 million in total common stockholder's equity primarily due to capital contributions from Southern Company.
See Notes 2, 8, 9, and 11 to the financial statements for additional information.
Mississippi Power
Significant balance sheet changes in 2019 for Mississippi Power included:
a decrease of $231 million in long-term debt, primarily due to the reclassification of $249 million of senior notes to securities due within one year and the redemption of $25 million of senior notes, partially offset by $43 million in pollution control revenue bonds reoffered to the public;
an increase of $107 million in other property and investments primarily due to a new tolling arrangement accounted for as a sales-type lease;
increases of $67 million in regulatory assets associated with AROs and $31 million in AROs, deferred primarily due to ARO revisions; and
a net change of $57 million in accumulated deferred income tax assets and liabilities primarily due to the recognition of a tax loss on the CO2 pipeline transfer and the alternative minimum tax carryforward from prior years.
See Notes 2, 6, 8, 9, and 10 to the financial statements for additional information.
Southern Power
Significant balance sheet changes in 2019for Southern Power included:
a $662 million decrease in stockholders' equity due to returns of capital to Southern Company;
a $635 million decrease in accumulated deferred income tax assets primarily related to the utilization of tax credits for the 2019 tax year;
a $619 million decrease in long-term debt (including securities due within one year) related to the maturity of $600 million in senior notes;
a $449 million increase in notes payable due to net issuances of commercial paper; and
increases in operating lease right-of-use assets, net of amortization and operating lease obligations totaling $369 million and $376 million, respectively, recorded upon the adoption of ASC 842.
See Notes 8, 9, and 10 to the financial statements for additional information.
Southern Company Gas
Significant balance sheet changes in 2019 for Southern Company Gas included:
an increase of $950 million in property, plant, and equipment primarily due to utility capital expenditures and infrastructure investments recovered through replacement programs, partially offset by $115 million of asset impairment charges;
additional paid-in-capital of $841 million primarily related to capital contributions from Southern Company;
decreases of $373 million and $414 million in energy marketing receivables and payables, respectively, due to lower natural gas prices and volumes of natural gas sold;

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

a $287 million decrease in equity investments in unconsolidated subsidiaries primarily due to $151 million associated with Pivotal LNG and Atlantic Coast Pipeline reclassified to assets held for sale, as well as distributions from SNG and the sale of Triton;
a $203 million increase in accumulated deferred income taxes primarily due to accelerated tax depreciation and other timing differences;
reclassification of $171 million in total assets held for sale associated with Pivotal LNG and Atlantic Coast Pipeline;
a $95 million decrease in long-term debt primarily due to the redemption of $300 million in senior notes and the repayment of $50 million in first mortgage bonds, partially offset by the issuance of $300 million in first mortgage bonds; and
increases of $93 million in operating right-of-use assets and $92 million in operating lease obligations, respectively, related to the adoption of ASC 842.
See Notes 3, 7, 8, 9, 10, and 15 to the financial statements for additional information.
Sources of Capital
Southern Company intends to meet its future capital needs through operating cash flows, borrowings from financial institutions, and debt and equity issuances in the capital markets. Equity capital can be provided from any combination of Southern Company's stock plans, private placements, or public offerings. Southern Company does not expect to issue any equity in the capital markets through 2024.
The Company plansSubsidiary Registrants plan to obtain the funds required for construction and other purposesto meet their future capital needs from sources similar to those they used in the past, which were primarily from operating cash flows, short-term debt, external securitysecurities issuances, term loans, borrowings from the FFB,financial institutions, and equity contributions from Southern Company. However,In addition, Georgia Power plans to utilize borrowings from the FFB, as discussed further in Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings," Southern Power plans to utilize tax equity partnership contributions, as discussed further herein, and Southern Company Gas plans to utilize proceeds from the pending sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, as discussed further in Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline."
The amount, type, and timing of any future financings if needed,in 2020, as well as in subsequent years, will be contingent on investment opportunities and the Registrants' capital requirements and will depend upon regulatory approvals, prevailing market conditions, regulatory approvals (for the Subsidiary Registrants), and other factors. See "Capital Requirements" herein for additional information.
The Company may make borrowings through a loan guarantee agreement (Loan Guarantee Agreement) between
Southern Power utilizes tax equity partnerships as one of its financing sources, where the Companytax partner takes significantly all of the federal tax benefits. These tax equity partnerships are consolidated in Southern Power's financial statements and are accounted for using HLBV methodology to allocate partnership gains and losses. During 2019, Southern Power obtained tax equity funding for the DOE, theWildhorse Mountain wind project and received proceeds of which may be used to reimburse the Company for a portion of certain costs of construction relating to Plant Vogtle Units 3$97 million. See Notes 1 and 4 that are eligible for financing under the Loan Guarantee Agreement (Eligible Project Costs). Under the Loan Guarantee Agreement, the DOE agreed to guarantee borrowings of up to $3.46 billion (not to exceed 70% of Eligible Project Costs) to be made by the Company under a multi-advance credit facility (FFB Credit Facility) among the Company, the DOE, and the FFB. Eligible Project Costs incurred through December 31, 2016 would allow for borrowings of up to $2.7 billion under the FFB Credit Facility, of which the Company has borrowed $2.6 billion. See Note 615 to the financial statements under "DOE Loan Guarantee Borrowings""General" and "Southern Power," respectively, for additional information regarding the Loan Guarantee Agreement and Note 3 to theinformation.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

financial statements under "Retail Regulatory Matters – Nuclear Construction" for additional information regarding Plant Vogtle Units 3 and 4.
The issuance of long-term securities by the Companytraditional electric operating companies and Nicor Gas is generally subject to the approval of the Georgia PSC. In addition, theapplicable state PSC or other applicable state regulatory agency. The issuance of short-term debtall securities by the CompanyMississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Southern Company, the traditional electric operating companies, and Southern Power (excluding its subsidiaries), Southern Company filesGas Capital, and Southern Company Gas (excluding its other subsidiaries) file registration statements with the SEC under the Securities Act of 1933, as amended.amended (1933 Act). The amounts of securities authorized by the Georgia PSC andappropriate regulatory authorities, as well as the FERCsecurities registered under the 1933 Act, are continuouslyclosely monitored and appropriate filings are made to ensure flexibility in the capital markets.
The Company obtainsRegistrants generally obtain financing separately without credit support from any affiliate. See Note 68 to the financial statements under "Bank"Bank Credit Arrangements"Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of the Companyeach company are not commingled with funds of any other company in the Southern Company system.system, except in the case of Southern Company Gas, as described below.
The traditional electric operating companies and SEGCO may utilize a Southern Company subsidiary organized to issue and sell commercial paper at their request and for their benefit. Proceeds from such issuances for the benefit of an individual company are loaned directly to that company. The obligations of each traditional electric operating company and SEGCO under these arrangements are several and there is no cross-affiliate credit support. Alabama Power also maintains its own separate commercial paper program.
Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. Southern Company Gas maintains commercial

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

paper programs at Southern Company Gas Capital and Nicor Gas. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of the other Southern Company Gas subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2016,2019, the Company's current liabilities exceeded current assets by $1.5 billion. amount of subsidiary retained earnings restricted to dividend totaled $951 million. This restriction did not impact Southern Company Gas' ability to meet its cash obligations, nor does management expect such restriction to materially impact Southern Company Gas' ability to meet its currently anticipated cash obligations.
The Company'sRegistrants' current liabilities frequently exceed their current assets because of scheduled maturities of long-term debt maturities and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs. See Note 8 to the financial statements for additional information. Also see "Financing Activities" herein for information on issuances of long-term debt subsequent to December 31, 2019. At December 31, 2019, the following Registrants' current liabilities exceeded their current assets, primarily as a result of securities due within one year and notes payable, as shown in the table below:
At December 31, 2019
Southern Company(*)
Georgia
Power
Mississippi PowerSouthern Power
 (in millions)
Current liabilities in excess of current assets$2,729
$1,902
$125
$945
Securities due within one year2,989
1,025
281
824
Notes payable2,055
365

549
(*)Includes $600 million and $465 million of securities due within one year and notes payable, respectively, at the parent company.
The Company intends to utilizeRegistrants believe the need for working capital can be adequately met by utilizing operating cash flows, as well as FFB borrowings, commercial paper, lines of credit, and short-term bank notes, and external securities issuances, as market conditions permit, andpermit. In addition, under certain circumstances, the Subsidiary Registrants may utilize equity contributions and/or loans from Southern Company to fund its short-term capital needs. The Company has substantial cash flow from operating activities and access to the capital markets and financial institutions to meet short-term liquidity needs.Company.
Bank Credit Arrangements
At December 31, 2016,2019, the Company had approximately $3 million of cash and cash equivalents. ARegistrants' unused committed credit arrangementarrangements with banks at December 31, 2016 was $1.75 billion of which $1.73 billion was unused. This credit arrangement expires in 2020.were as follows:
This bank credit arrangement contains a covenant that limits debt levels and contains a cross acceleration provision to other indebtedness (including guarantee obligations) of the Company. Such cross acceleration provision to other indebtedness would trigger an event of default if the Company defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2016, the Company was in compliance with this covenant. This bank credit arrangement does not contain a material adverse change clause at the time of borrowing.
At December 31, 2019
Southern
Company
parent
Alabama PowerGeorgia
Power
Mississippi Power
Southern
 Power(a)
Southern Company Gas(b)
SEGCO
Southern
Company
 (in millions)
Unused committed credit$1,999
$1,328
$1,733
$150
$591
$1,745
$30
$7,576
(a)At December 31, 2019, Southern Power also had a continuing letter of credit facility for standby letters of credit, of which $23 million was unused. Subsequent to December 31, 2019, Southern Power entered into an additional $60 million continuing letter of credit facility for standby letters of credit. Southern Power's subsidiaries are not parties to its bank credit arrangement or to the letter of credit facilities.
(b)Includes $1.245 billion and $500 million at Southern Company Gas Capital and Nicor Gas, respectively.
Subject to applicable market conditions, the Company expectsRegistrants, Nicor Gas, and SEGCO expect to renew or replace thistheir bank credit arrangement,arrangements as needed, prior to expiration. In connection therewith, the CompanyRegistrants, Nicor Gas, and SEGCO may extend the maturity datedates and/or increase or decrease the lending commitments thereunder.
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
A portion of the unused credit with banks is allocated to provide liquidity support to the Company's pollution control revenue bonds of the traditional electric operating companies and the commercial paper programs of the Registrants, Nicor Gas, and SEGCO. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
Short-term Borrowings
The Registrants, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Southern Power's subsidiaries are not issuers or obligors under its commercial paper program. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support as of December 31, 2016 was approximately $868 million. In addition, at December 31, 2016, the Company had $250 million of fixed rate pollution control revenue bonds outstanding that were required to be reoffered within the next 12 months.
The Company may also meet short-term cash needs through a Southern Company subsidiary organized to issue and sell commercial paper at the request and for the benefit of the Company and the other traditional electric operating companies. Proceeds from such issuances for the benefit of the Company are loaned directly to the Company. The obligations of each traditional electric operating company under these arrangements are several and there is no cross-affiliate credit support. Commercial paper isand short-term bank term loans are included in notes payable in the balance sheets.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

Details ofthe Registrants' short-term borrowings were as follows:

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 Short-term Debt at the End of the Period 
Short-term Debt During the Period (*)
 Amount Outstanding Weighted Average Interest Rate Average Amount Outstanding Weighted Average Interest Rate Maximum Amount Outstanding
 (in millions)   (in millions)   (in millions)
December 31, 2016:         
Commercial paper$392
 1.1% $87
 0.8% $443
December 31, 2015:         
Commercial paper$158
 0.6% $234
 0.3% $678
Short-term bank debt
 % 62
 0.8% 250
Total$158
 0.6% $296
 0.4%  
December 31, 2014:         
Commercial paper$156
 0.3% $280
 0.2% $703
Short-term bank debt
 % 56
 0.9% 400
Total$156
 0.3% $336
 0.3%  

 Short-term Debt at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 December 31, December 31,
 201920182017 201920182017
 (in millions)    
Southern Company$2,055
$2,915
$2,439
 2.1%3.1%1.9%
Alabama Power

3
 

3.7
Georgia Power365
294
150
 2.2
3.1
2.2
Mississippi Power

4
 

3.8
Southern Power549
100
105
 2.2
3.1
2.0
Southern Company Gas:





    
Southern Company Gas Capital$372
$403
$1,243
 2.1%3.1%1.7%
Nicor Gas278
247
275
 1.8
3.0
1.8
Southern Company Gas Total$650
$650
$1,518
 2.0%3.0%1.8%
 
Short-term Debt During the Period(*)
 Average Amount Outstanding 
Weighted Average
Interest Rate
 Maximum Amount Outstanding
 201920182017 201920182017 201920182017
 (in millions)     (in millions)
Southern Company$1,240
$3,377
$2,672
 2.6%2.6%1.5% $2,914
$5,447
$3,668
Alabama Power17
27
25
 2.6
2.3
1.3
 190
258
223
Georgia Power371
139
427
 2.7
2.5
1.8
 935
710
1,460
Mississippi Power
68
18
 
2.0
3.0
 
300
36
Southern Power76
188
232
 2.7
2.5
1.4
 578
385
419
Southern Company Gas:           
Southern Company Gas Capital$302
$520
$723
 2.6%2.3%1.4% $490
$1,361
$1,243
Nicor Gas91
123
176
 2.3
2.2
1.1
 278
275
525
Southern Company Gas Total$393
$643
$899
 2.5%2.3%1.4%    
(*)Average and maximum amounts are based upon daily balances during the twelve-month12-month periods ended December 31, 2016, 2015,2019, 2018, and 2014.2017.
The

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company believes the need for working capital can be adequately met by utilizing the commercial paper program, lines of credit, short-term bank notes, and operating cash flows.Subsidiary Companies 2019 Annual Report

Financing Activities
The following table outlines the Registrants' long-term debt financing activities for the year ended December 31, 2019:
Company
Senior
Note
Issuances
 
Senior Note
Maturities, Redemptions, and Repurchases
 
Revenue
Bond
Issuances and
Reofferings
of Purchased
Bonds
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities(a)
 (in millions)
Southern Company parent$
 $2,400
 $
 $
 $1,725
 $
Alabama Power600
 200
 
 
 
 1
Georgia Power750
 500
 584
 223
 1,218
 13
Mississippi Power
 25
 43
 
 
 
Southern Power
 600
 
 
 
 
Southern Company Gas
 300
 
 
 300
 50
Other
 
 
 25
 
 17
Elimination(b)

 
 
 
 
 (7)
Southern Company$1,350
 $4,025
 $627
 $248
 $3,243
 $74
(a)Includes reductions in finance lease obligations resulting from cash payments under finance leases.
(b)Represents reductions in affiliate finance lease obligations at Georgia Power, which are eliminated in Southern Company's consolidated financial statements.
Except as otherwise described herein, the Registrants used the proceeds of debt issuances for their redemptions and maturities shown in the table above, to repay short-term indebtedness, and for general corporate purposes, including working capital. The Subsidiary Registrants also used the proceeds for their construction programs.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Company plansRegistrants plan to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Senior
Southern Company
During 2019, Southern Company issued approximately 19.5 million shares of common stock through employee equity compensation plans and received proceeds of approximately $844 million.
In addition, in August 2019, Southern Company issued 34.5 million 2019 Series A Equity Units (Equity Units), initially in the form of corporate units (Corporate Units), at a stated amount of $50 per Corporate Unit, for a total stated amount of $1.725 billion. Net proceeds from the issuance were approximately $1.682 billion. Each Corporate Unit is comprised of (i) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019A Remarketable Junior Subordinated Notes due 2024, (ii) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019B Remarketable Junior Subordinated Notes due 2027, and (iii) a stock purchase contract, which obligates the holder to purchase from Southern Company, no later than August 1, 2022, a certain number of shares of Southern Company's common stock for $50 in cash. See Note 8 to the financial statements under "Equity Units" for additional information.
In March 2016, theJanuary 2019, Southern Company issued $325repaid a $250 million short-term uncommitted bank credit arrangement and a $1.5 billion short-term floating rate bank loan.
In 2019, Southern Company, through repurchases and redemptions, retired all $1.0 billion aggregate principal amount of its 1.85% Senior Notes due July 1, 2019, $350 million aggregate principal amount of its Series 2016A 3.25%2014B 2.15% Senior Notes due AprilSeptember 1, 2026 and $3252019, $750 million aggregate principal amount of its Series 2016B 2.40% Senior2018A Floating Rate Notes due April 1, 2021. An amount equal to the proceeds from the Series 2016A 3.25% Senior Notes due April 1, 2026 is being allocated to eligible green expenditures, including financing of or investments in solar generating facilities or electric vehicle charging infrastructure, or payments under PPAs served by solar or wind generating facilities. The proceeds from the Series 2016B 2.40% Senior Notes due April 1, 2021 were used to repay at maturity $250February 14, 2020, and $300 million aggregate principal amount of the Company'sits Series 2013B2017A Floating Rate Senior Notes due March 15, 2016,September 30, 2020.
Subsequent to repay a portion of the Company's short-term indebtedness, and for general corporate purposes, including the Company's continuous construction program.
In April 2016, the Company's $250 millionDecember 31, 2019, Southern Company issued $1.0 billion aggregate principal amount of Series 2011B 3.00% Senior2020A 4.95% Junior Subordinated Notes weredue January 30, 2080.
Alabama Power
In February 2019, Alabama Power repaid at maturity.
In August 2016, the Company'smaturity $200 million aggregate principal amount of Series 2013C Floating RateZ 5.125% Senior Notes were repaid at maturity.due February 15, 2019.
Pollution Control Revenue Bonds

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In January 2016, $4.085September 2019, Alabama Power issued $600 million aggregate principal amount of Savannah Economic Development Authority Pollution Control Revenue Bonds (Savannah Electric andSeries 2019A 3.45% Senior Notes due October 1, 2049.
Subsequent to December 31, 2019, Alabama Power Company Project), First Series 1993 were repaid at maturity.received a capital contribution totaling $610 million from Southern Company.
DOE Loan Guarantee Borrowings
Georgia Power
In JuneMarch and December 2016, the Company2019, Georgia Power made additional borrowings under the FFB Credit Facilitymulti-advance credit facilities related to the Amended and Restated Loan Guarantee Agreement in an aggregate principal amount of $300$835 million and $125$383 million, respectively. Therespectively, with applicable interest rate applicablerates of 3.213% and 2.537%, respectively, both for an interest period that extends to the $300 million principal amount is 2.571% and the interest rate applicable to the $125 million principal amount is 3.142%, both for interest periods that extend to the final maturity date of February 20, 2044. The proceeds were used to reimburse the CompanyGeorgia Power for Eligible Project Costs relating to the construction of Plant Vogtle Units 3 and 4. See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
In June 2019, Georgia Power entered into two short-term floating rate bank loans in aggregate principal amounts of $125 million each, both of which bear interest based on one-month LIBOR.
In September 2019, Georgia Power issued $400 million aggregate principal amount of Series 2019A 2.20% Senior Notes due September 15, 2024 and $350 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
Subsequent to December 31, 2019, Georgia Power issued $700 million aggregate principal amount of Series 2020A 2.10% Senior Notes due July 30, 2023, $500 million aggregate principal amount of Series 2020B 3.70% Senior Notes due January 30, 2050, and an additional $300 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
During 2019, Georgia Power reoffered to the public the following pollution control revenue bonds that previously had been purchased and were held by Georgia Power at December 31, 2018:
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009;
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013;
$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008;
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994; and
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013.
During 2019, Georgia Power purchased, held, and subsequently reoffered to the public an additional $115 million of pollution control revenue bonds.
In January 2019, Georgia Power redeemed approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In December 2019, Georgia Power repaid at maturity $500 million aggregate principal amount of its Series 2009B 4.25% Senior Notes.
Subsequent to December 31, 2019, Georgia Power received a capital contribution totaling $500 million from Southern Company and announced the redemption of all $500 million aggregate principal amount of its Series 2017C 2.00% Senior Notes due September 8, 2020.
Mississippi Power
In March 2019, Mississippi Power reoffered to the public approximately $43 million of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002, which previously had been purchased and held by Mississippi Power.
In December 2019, Mississippi Power redeemed $25 million aggregate principal amount of its Series 2018A Floating Rate Senior Notes due March 27, 2020.
Southern Power
In May 2019, Southern Power repaid at maturity a $100 million short-term floating rate bank loan.


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Under the Loan Guarantee Agreement, the Company is subject to customary events of default, as well as cross-defaults to other indebtedness and events of default relating to any failure to make payments under the engineering, procurement, and construction contract, as amended, relating to Plant Vogtle Units 3 and 4 or certain other agreements providing intellectual property rights for Plant Vogtle Units 3 and 4. The Loan Guarantee Agreement also includes events of default specific to the DOE loan guarantee program, including the failure of the Company orIn December 2019, Southern Nuclear to comply with requirements of law or DOE loan guarantee program requirements. In the event certain mandatory prepayment events occur, the FFB's commitment to make further advances under the FFB Credit Facility will terminate and the Company will be required to prepay the outstandingPower repaid at maturity $600 million aggregate principal amount of all borrowings underits Series 2016D 1.95% Senior Notes.
Also in December 2019, Southern Power entered into a short-term floating rate bank loan in the FFB Credit Facility overaggregate principal amount of $100 million, bearing interest based on one-month LIBOR. Subsequent to December 31, 2019, Southern Power repaid the bank loan.
Southern Company Gas
In July 2019, Nicor Gas repaid at maturity $50 million aggregate principal amount of its 4.7% first mortgage bonds.
In August 2019, Southern Company Gas Capital repaid at maturity $300 million aggregate principal amount of its 5.25% Senior Notes.
In August and October 2019, Nicor Gas issued $200 million and $100 million, respectively, aggregate principal amount of first mortgage bonds in a period of five years (with level principal amortization). See Note 6 to the financial statements under "DOE Loan Guarantee Borrowings" for additional information.private placement.
Credit Rating RiskStorm Damage Recovery
Beginning January 1, 2020, Georgia Power is recovering $213 million annually through December 31, 2022, as provided in the 2019 ARP, for incremental operations and maintenance costs of damage from major storms to its transmission and distribution facilities. At December 31, 2016,2019, the balance in the regulatory asset related to storm damage was $410 million. The rate of storm damage cost recovery is expected to be adjusted in future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's or Georgia Power's financial statements. See Note 2 to the financial statements under "Georgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company didand Subsidiary Companies 2019 Annual Report

2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 currently have any credit arrangements thatlong-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in payment schedulesthe billing factor should have no significant effect on Mississippi Power's revenues or terminationsnet income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment,changes in the eventcost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a credit ratingrelated DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to BBB- and/substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 to the financial statements for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or Baa3at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and Mississippi Power's financial statements.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or below.approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These contracts areagencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for physical electricity purchasesAtlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and sales, fuel purchases, fuelhandle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy price riskefficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information regarding infrastructure replacement programs at certain of the natural gas distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(a)Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Programs
The Registrants are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations.
For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the financial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See "Southern Company Gas" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities and certain pipeline construction projects.
See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein for additional information regarding the Registrants' capital requirements for their construction programs, including estimated totals for each of the next five years.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Services Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events.
See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new generationtechnology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet.
The maximum potential collateral requirementsultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.
Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.
The ultimate outcome of these contractsmatters cannot be determined at this time.
Southern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 20162019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were as follows:$417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the utility infrastructure. In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Credit Ratings
Maximum
Potential
Collateral
Requirements
 (in millions)
At BBB- and/or Baa3$93
Below BBB- and/or Baa3$1,258
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
IncludedIn 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Rate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in two significant pipeline construction projects within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served.
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approval.
The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these amountsmatters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was no impairment as of December 31, 2019.
See Notes 3 and 7 to the financial statements under "Guarantees" and "Southern Company GasEquity Method Investments," respectively, for additional information on these pipeline projects.
Southern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are certain agreementsexpected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that could require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or Alabamathe terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a credit rating changegeneral matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to below investment grade. Generally, collateralthe energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be provided by aresponsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Company guaranty, letterPower's PPAs provide that the counterparties are responsible for the availability of credit, or cash. Additionally, a credit rating downgrade could impactfuel transportation to the abilityparticular generating facility.
Capacity charges that form part of the CompanyPPA payments are designed to access capital marketsrecover fixed and would be likelyvariable operation and maintenance costs based on dollars-per-kilowatt year. In general, to impact the cost at which it does so.
On January 10, 2017, S&P revised its consolidated credit rating outlook forreduce Southern Company (including the Company) from negative to stable.
Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, the Company continues to have limitedPower's exposure to market volatility in interest rates, commodity fuel prices,certain operation and prices of electricity. To manage the volatility attributable to these exposures, the Company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to changes in interest rates, the Company may enter into derivatives designated as hedges. The weighted average interest rate on $1.8 billion of long-term variable interest rate exposure at January 1, 2017 was 1.91%. If the Company sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $18 million at January 1, 2017.maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Financial Instruments""Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Consolidated Income Taxes
On behalf of the Registrants, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect each Registrant's ability to utilize certain tax credits. See "Tax Credits" and ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein and Note 1110 to the financial statements for additional information.
To mitigate residual risks relativeFederal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to movements in electricity prices,21%, retained normalization provisions for public utility property and existing renewable energy incentives, and repealed the Company enters into physical fixed-price contracts forcorporate alternative minimum tax. In addition, under the purchase and saleTax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases. The Company continues to manage a fuel-hedging program implemented per the guidelinestaxable income of the Georgia PSC.subsequent tax year. The Company had no material change in market risk exposure forprojected reduction of Southern Company's consolidated income tax liability resulting from the year ended December 31, 2016 when comparedtax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and Note 10 to the December 31, 2015 reporting period.financial statements for information on Southern Company's joint consolidated income tax allocation agreement.


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


The changesBonus Depreciation
Under the Tax Reform Legislation, projects with binding contracts prior to September 28, 2017 and placed in fair value of energy-related derivative contracts are substantially attributableservice after September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. Based on provisional estimates, bonus depreciation is expected to bothresult in positive cash flows for the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, wereRegistrants as follows:
 
2016
Changes
 
2015
Changes
 Fair Value
 (in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net$(13) $(20)
Contracts realized or settled:   
Swaps realized or settled(2) 2
Options realized or settled11
 18
Current period changes(*):
   
Swaps31
 
Options9
 (13)
Contracts outstanding at the end of the period, assets (liabilities), net$36
 $(13)
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Current period changesCash flows resulting from bonus depreciation for Southern Power would also include the changes in fair valuebe impacted by Southern Power's use of new contracts entered into during the period, if any.tax equity partnerships.
The net hedge volumes of energy-related derivative contracts for the years ended December 31 were as follows:
 2016 2015
 mmBtu Volume
 (in millions)
Commodity – Natural gas swaps128
 
Commodity – Natural gas options27
 50
Total hedge volume155
 50
The weighted average swap contract cost below market prices was approximately $0.23 per mmBtu as of December 31, 2016. There were no swaps outstanding as of December 31, 2015. The change in option fair value is primarily attributable to the volatility of the market and the underlying change in the natural gas price. All natural gas hedge gains and losses are recovered through the Company's fuel cost recovery mechanism.
At December 31, 2016 and 2015, substantially all of the Company's energy-related derivative contracts were designated as regulatory hedges and were related to the Company's fuel-hedging program. Through December 31, 2015, the Company's fuel-hedging program had a time horizon up to 24 months. Effective January 1, 2016, the Georgia PSC approved changes to the Company's hedging program allowing it to use an array of derivative instruments within a 48-month time horizon. Hedging gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the fuel cost recovery mechanism. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred and were not material for any year presented.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

The Company uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 10 to the financial statements under "Current and Deferred Income Taxes" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Tax Credits
The Tax Reform Legislation retained solar energy incentives of 30% ITC for projects that commenced construction by December 31, 2019; 26% ITC for projects that commence construction in 2020; 22% ITC for projects that commence construction in 2021; and a permanent 10% ITC for projects that commence construction on or after January 1, 2022. In addition, the Tax Reform Legislation retained wind energy incentives of 100% PTC for projects that commenced construction in 2016; 80% PTC for projects that commenced construction in 2017; 60% PTC for projects that commenced construction in 2018; and 40% PTC for projects that commenced construction in 2019. As a result of a tax extenders bill passed in December 2019, projects that begin construction in 2020 will be entitled to 60% PTC. Projects commencing construction after 2020 will not be entitled to any PTCs. Southern Company has received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power.
Southern Power's ITCs relate to its investment in new solar facilities acquired or constructed and its PTCs relate to the first 10 years of energy production from its wind facilities, which have had, and may continue to have, a material impact on Southern Power's cash flows and net income. At December 31, 2019, Southern Company and Southern Power had approximately $1.8 billion and $1.4 billion, respectively, of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2024, but could be further discussion of fair value measurements. The maturitiesdelayed. Since 2018, Southern Power has been utilizing tax equity partnerships for wind and solar projects, where the tax partner takes significantly all of the energy-related derivative contracts, whichrespective federal tax benefits. These tax equity partnerships are all Level 2 ofconsolidated in Southern Company's and Southern Power's financial statements using the fair value hierarchy, at December 31, 2016 were as follows:
 
Fair Value Measurements
December 31, 2016
 Total Maturity
 Fair Value Year 1 Years 2&3 
 (in millions)
Level 1$
 $
 $
Level 236
 28
 8
Level 3
 
 
Fair value of contracts outstanding at end of period$36
 $28
 $8
The Company is exposedHLBV methodology to market price risk in the event of nonperformance by counterparties to the energy-relatedallocate partnership gains and interest rate derivative contracts. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Company does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, seelosses. See Note 1 to the financial statements under "Financial Instruments""General" for additional information on the HLBV methodology and Note 111 to the financial statements.statements under "Income Taxes" and Note 10 to the financial statements under "Deferred Tax Assets and LiabilitiesTax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax benefit related to associated basis differences.
Capital Requirements
General Litigation Matters
The Registrants are involved in various other matters being litigated and Contractual Obligationsregulatory matters that could affect future earnings. The ultimate outcome of such pending or potential litigation or regulatory matters against each Registrant and any subsidiaries cannot be determined at this time; however, for current proceedings not specifically reported herein or in Notes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on such Registrant's financial statements. See Notes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
The construction programRegistrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is currently estimatedearlier, in the securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and three members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included four additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Other Matters
Southern Company
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows. See Note 1 to the financial statements under "Leveraged Leases" for additional information.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not return to service by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has two other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million at December 31, 2019.
The ultimate outcome of these matters cannot be determined at this time, but could have a material impact on the financial statements of Southern Company and Southern Company Gas.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Registrants prepare their financial statements in accordance with GAAP. Significant accounting policies are described in the notes to the financial statements. In the application of these policies, certain estimates are made that may have a material impact

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

on the results of operations and related disclosures of the applicable Registrants (as indicated in the section descriptions herein). Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The traditional electric operating companies and the natural gas distribution utilities are subject to retail regulation by their respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the FERC. These regulatory agencies set the rates the traditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result, the traditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards for rate regulated entities also impacts their financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the results of operations and financial condition of the applicable Registrants than they would on a non-regulated company.
Revenues related to regulated utility operations as a percentage of total $2.6operating revenues in 2019 for the applicable Registrants were as follows: 87% for Southern Company, 99% for Alabama Power, 97% for Georgia Power, 100% for Mississippi Power, and 80% for Southern Company Gas.
As reflected in Note 2 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the financial statements of the applicable Registrants.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
(Southern Company and Georgia Power)
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In 2017, the Georgia PSC approved Georgia Power's seventeenth VCM report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion for 2017, $2.7of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion for 2018, $2.1would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion for 2019, $1.9were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion for 2020, and(net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for 2021. These amounts include expendituresUnit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of approximately $0.7 billion, $0.5 billion, $0.3Plant Vogtle Units 3 and 4 to $8.0 billion and $0.1$0.4 billion, respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in 2017, 2018, 2019, and 2020, respectively. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel and capital expenditures covered under long-term service agreements. Estimated capital expenditures to comply with environmental statutes and regulationscosts included in these amounts are $0.4 billion, $0.3 billion, $0.1 billion, $0.2 billion, and $0.2 billion for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential compliance costs that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from new, existing, modified, or reconstructed fossil-fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" and "– Global Climate Issues" herein for additional information.
The Company also anticipates costs associated with closure and monitoring of ash ponds in accordance with the CCR Rule, which are reflectedbase capital cost forecast in the Company's ARO liabilities. Thesenineteenth VCM report. After considering the significant level of uncertainty that exists regarding the future recoverability of costs which could change asincluded in the Company continues to refine its assumptions underlyingconstruction contingency estimate since the cost estimates and evaluate the method and timingultimate outcome of compliance activities, are estimated to be $0.3 billion for 2017 and $0.2 billion per year for 2018 through 2021. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
The construction programthese matters is subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; changes in environmental statutes and regulations; the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However, Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any legalrequired engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to environmental rules; changesthe construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in generating plants, including unit retirements and replacements and adding or changing fuel sources at existing generating units,place that are designed to meet regulatory requirements; changes in FERC rules and regulations; Georgia PSC approvals; changesassure compliance with the requirements specified in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; storm impacts;Westinghouse Design Control Document and the cost of capital. In addition, there can be no assurancecombined construction and operating licenses, including inspections by Southern Nuclear and the NRC that costs related to capital expenditures will be fully recovered. See Note 3 to the financial statements under "Retail Regulatory Matters – Nuclear Construction" for information regarding additional factors that may impact construction expenditures.
occur throughout construction. As a result of requirementssuch compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company has established external trust funds for nuclear decommissioning costs. For additional information, see Note 1and Subsidiary Companies 2019 Annual Report

not to seek recovery. Any further changes to the financial statements under "Nuclear Decommissioning."capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
In addition,Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as discussed inwell as the potential impact on results of operations and cash flows, Southern Company and Georgia Power consider these items to be critical accounting estimates. See Note 2 to the financial statements theunder "Georgia PowerNuclear Construction" for additional information.
Accounting for Income Taxes (Southern Company, provides postretirement benefits to substantially all employeesMississippi Power, Southern Power, and funds trusts to the extent required by the Georgia PSCSouthern Company Gas)
The consolidated income tax provision and the FERC.
Other funding requirements related to obligations associated with scheduled maturities of long-term debt,deferred income tax assets and liabilities, as well as the related interest, derivative obligations, preferred and preference stock dividends, leases, other purchase commitments, and trusts are

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

detailed in the contractual obligations table that follows. See Notes 1, 2, 6, 7, and 11 to the financial statements for additional information.
Contractual Obligations
Contractual obligations at December 31, 2016 were as follows:
 2017 
2018-
2019
 
2020-
2021
 
After
2021
 Total
 (in millions)
Long-term debt(a) —
         
Principal$450
 $1,250
 $413
 $8,533
 $10,646
Interest383
 698
 628
 5,112
 6,821
Preferred and preference stock dividends(b)
17
 35
 35
 
 87
Financial derivative obligations(c)
1
 6
 1
 
 8
Operating leases(d)
19
 22
 17
 15
 73
Capital leases(d)
9
 17
 7
 
 33
Purchase commitments —         
Capital(e)
2,412
 4,347
 2,941
 
 9,700
Fuel(f)
1,628
 1,681
 878
 6,320
 10,507
Purchased power(g)
320
 595
 539
 2,543
 3,997
Other(h)
108
 141
 126
 361
 736
Trusts —         
Nuclear decommissioning(i)
5
 11
 11
 99
 126
Pension and other postretirement benefit plans(j)
46
 90
 
 
 136
Total$5,398
 $8,893
 $5,596
 $22,983
 $42,870
(a)All amounts are reflected based on final maturity dates except for amounts related to FFB borrowings. As it relates to the FFB borrowings, the final maturity date is February 20, 2044; however, principal amortization is reflected beginning in 2020. See Note 6 to the financial statements under "DOE Loan Guarantee Borrowings" for additional information. The Company plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates as of January 1, 2017, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. Long-term debt excludes capital lease amounts (shown separately).
(b)Preferred and preference stock do not mature; therefore, amounts provided are for the next five years only.
(c)Includes derivative liabilities related to energy-related derivatives. For additional information, see Notes 1 and 11 to the financial statements.
(d)Excludes PPAs that are accounted for as leases and included in "Purchased power."
(e)The Company provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel and capital expenditures covered under long-term service agreements which are reflected in "Fuel" and "Other," respectively. At December 31, 2016, significant purchase commitments were outstanding in connection with the construction program. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" and "Retail Regulatory Matters – Nuclear Construction" herein for additional information.
(f)Includes commitments to purchase coal, nuclear fuel, and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the New York Mercantile Exchange future prices at December 31, 2016.
(g)Estimated minimum long-term obligations for various PPA purchases from gas-fired, biomass, and wind-powered facilities. Includes a total of $292 million of biomass PPAs that is contingent upon the counterparties meeting specified contract dates for commercial operation. Subsequent to December 31, 2016, the specified contract dates for commercial operation were extended from 2017 to 2019 and may change further as a result of regulatory action. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Renewables" herein for additional information.
(h)Includes long-term service agreements and contracts for the procurement of limestone. Long-term service agreements include price escalation based on inflation indices.
(i)
Projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2013 ARP. See Note 1 to the financial statements under "Nuclear Decommissioning" for additional information.
(j)The Company forecasts contributions to the pension and other postretirement benefit plans over a three-year period. The Company anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from the Company's corporate assets. See Note 2 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from the Company's corporate assets.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

Cautionary Statement Regarding Forward-Looking Statements
The Company's 2016 Annual Report contains forward-looking statements. Forward-looking statements include, among other things, statements concerning regulated rates, customer and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plan, postretirement benefit plans, and nuclear decommissioning trust fund contributions, financing activities, completion dates of construction projects, filings with state and federal regulatory authorities, impact of the PATH Act, federal incomeany unrecognized tax benefits estimated sales and purchases under power salevaluation allowances, require significant judgment and purchase agreements,estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negativeinterpretations of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impact of recent and future federal and state regulatory changes, including environmental laws regulating emissions, discharges, and disposal to air, water, and land, and also changes inapplicable tax and other laws and regulations to whichacross multiple taxing jurisdictions. The effective tax rate reflects the Company is subject, including potentialstatutory tax reform legislation, as well as changes in application of existing lawsrates and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
calculated apportionments for the effects, extent, and timing of the entry of additional competition in the marketsvarious states in which the Company operates;
variations in demand for electricity, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources such as self-generation and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of fuels;
effects of inflation;
the ability to control costs and avoid cost overruns during the development, construction, and operation of facilities, which include the development and construction of generating facilities with designs that have not been finalized or previously constructed;
the ability to construct facilities in accordance with the requirements of permits and licenses, to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completionoperates.
On behalf of construction;
investment performanceits subsidiaries, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited or utilized at the Company's employeeconsolidated or combined level resulting in NOL and retiree benefit planstax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and nuclear decommissioning trust funds;
advances in technology;
state and federal rate regulationstax credit carryforwards and the impactassessment of pendingvaluation allowances are based on significant judgment and future rate cases and negotiations, including rate cases related to fuel and other cost recovery mechanisms;
the ability to successfully operate generating, transmission, and distribution facilities and the successful performance of necessary corporate functions;
legal proceedings and regulatory approvals and actions related to Plant Vogtle Units 3 and 4, including Georgia PSC approvals and NRC actions;
the inherent risks involved in operating and constructing nuclear generating facilities, including environmental, health, regulatory, natural disaster, terrorism, and financial risks;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to the Company;
the ability of counterparties of the Company to make payments as and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Company's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia Power Company 2016 Annual Report

changes in the Company's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general, as well as potential impacts on the benefits of the DOE loan guarantees;
the ability of the Company to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;
the direct or indirect effects on the Company's business resulting from incidents affecting the U.S. electric grid or operation of generating resources;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (including the Form 10-K) filed by the Company from time to time with the SEC.
The Company expressly disclaims any obligation to update any forward-looking statements.

STATEMENTS OF INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Georgia Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Revenues:     
Retail revenues$7,772
 $7,727
 $8,240
Wholesale revenues, non-affiliates175
 215
 335
Wholesale revenues, affiliates42
 20
 42
Other revenues394
 364
 371
Total operating revenues8,383
 8,326
 8,988
Operating Expenses:     
Fuel1,807
 2,033
 2,547
Purchased power, non-affiliates361
 289
 287
Purchased power, affiliates518
 575
 701
Other operations and maintenance1,960
 1,844
 1,902
Depreciation and amortization855
 846
 846
Taxes other than income taxes405
 391
 409
Total operating expenses5,906
 5,978
 6,692
Operating Income2,477
 2,348
 2,296
Other Income and (Expense):     
Interest expense, net of amounts capitalized(388) (363) (348)
Other income (expense), net38
 61
 23
Total other income and (expense)(350) (302) (325)
Earnings Before Income Taxes2,127
 2,046
 1,971
Income taxes780
 769
 729
Net Income1,347
 1,277
 1,242
Dividends on Preferred and Preference Stock17
 17
 17
Net Income After Dividends on Preferred and Preference Stock$1,330
 $1,260
 $1,225
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Georgia Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Net Income$1,347
 $1,277
 $1,242
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $(6), and $(3),
respectively

 (9) (5)
Reclassification adjustment for amounts included in net income,
net of tax of $2, $1, and $1, respectively
2
 2
 2
Total other comprehensive income (loss)2
 (7) (3)
Comprehensive Income$1,349
 $1,270
 $1,239
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2016, 2015, and 2014
Georgia Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Activities:     
Net income$1,347
 $1,277
 $1,242
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total1,063
 1,029
 1,019
Deferred income taxes383
 173
 352
Allowance for equity funds used during construction(48) (40) (45)
Retail fuel cost over-recovery — long-term
 106
 (44)
Pension and postretirement funding(287) (7) (156)
Settlement of asset retirement obligations(123) (29) (12)
Other deferred charges — affiliated(111) 
 
Other, net(10) 10
 70
Changes in certain current assets and liabilities —     
-Receivables60
 187
 (248)
-Fossil fuel stock104
 37
 303
-Prepaid income taxes
 89
 (216)
-Other current assets(38) (62) (37)
-Accounts payable(42) (259) 16
-Accrued taxes131
 25
 17
-Accrued compensation(5) (17) 62
-Other current liabilities1
 (2) 40
Net cash provided from operating activities2,425
 2,517
 2,363
Investing Activities:     
Property additions(2,223) (2,091) (2,023)
Nuclear decommissioning trust fund purchases(808) (985) (671)
Nuclear decommissioning trust fund sales803
 980
 669
Cost of removal, net of salvage(83) (71) (65)
Change in construction payables, net of joint owner portion(35) 217
 (54)
Prepaid long-term service agreements(34) (66) (70)
Sale of property10
 70
 7
Other investing activities23
 2
 1
Net cash used for investing activities(2,347) (1,944) (2,206)
Financing Activities:     
Increase (decrease) in notes payable, net234
 2
 (891)
Proceeds —     
Senior notes650
 500
 
FFB loan425
 1,000
 1,200
Pollution control revenue bonds issuances and remarketings
 409
 40
Capital contributions from parent company594
 62
 549
Short-term borrowings
 250
 
Redemptions and repurchases —     
Senior notes(700) (1,175) 
Pollution control revenue bonds(4) (268) (37)
Short-term borrowings
 (250) 
Payment of common stock dividends(1,305) (1,034) (954)
Other financing activities(36) (26) (70)
Net cash used for financing activities(142) (530) (163)
Net Change in Cash and Cash Equivalents(64) 43
 (6)
Cash and Cash Equivalents at Beginning of Year67
 24
 30
Cash and Cash Equivalents at End of Year$3
 $67
 $24
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $20, $16, and $18 capitalized, respectively)$375
 $353
 $319
Income taxes (net of refunds)170
 506
 507
Noncash transactions —     
Accrued property additions at year-end336
 387
 154
Capital lease obligation
 149
 
The accompanying notes are an integral part of these financial statements.

BALANCE SHEETS
At December 31, 2016 and 2015
Georgia Power Company 2016 Annual Report
Assets2016
 2015
 (in millions)
Current Assets:   
Cash and cash equivalents$3
 $67
Receivables —   
Customer accounts receivable523
 541
Unbilled revenues224
 188
Joint owner accounts receivable57
 227
Income taxes receivable, current
 114
Other accounts and notes receivable81
 57
Affiliated18
 18
Accumulated provision for uncollectible accounts(3) (2)
Fossil fuel stock298
 402
Materials and supplies479
 449
Prepaid expenses105
 230
Other regulatory assets, current193
 213
Other current assets38
 19
Total current assets2,016
 2,523
Property, Plant, and Equipment:   
In service33,841
 31,841
Less accumulated provision for depreciation11,317
 10,903
Plant in service, net of depreciation22,524
 20,938
Other utility plant, net
 171
Nuclear fuel, at amortized cost569
 572
Construction work in progress4,939
 4,775
Total property, plant, and equipment28,032
 26,456
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries60
 64
Nuclear decommissioning trusts, at fair value814
 775
Miscellaneous property and investments46
 43
Total other property and investments920
 882
Deferred Charges and Other Assets:   
Deferred charges related to income taxes676
 679
Other regulatory assets, deferred2,774
 2,152
Other deferred charges and assets417
 173
Total deferred charges and other assets3,867
 3,004
Total Assets$34,835
 $32,865
The accompanying notes are an integral part of these financial statements.


BALANCE SHEETS
At December 31, 2016 and 2015
Georgia Power Company 2016 Annual Report
Liabilities and Stockholder's Equity2016
 2015
 (in millions)
Current Liabilities:   
Securities due within one year$460
 $712
Notes payable391
 158
Accounts payable —   
Affiliated438
 411
Other589
 750
Customer deposits265
 264
Accrued taxes —   
Accrued income taxes17
 12
Other accrued taxes390
 325
Accrued interest106
 99
Accrued compensation224
 205
Asset retirement obligations, current299
 179
Other regulatory liabilities, current31
 16
Over recovered regulatory clause revenues, current84
 10
Other current liabilities182
 154
Total current liabilities3,476
 3,295
Long-Term Debt (See accompanying statements)
10,225
 9,616
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes6,000
 5,627
Deferred credits related to income taxes121
 105
Accumulated deferred investment tax credits256
 204
Employee benefit obligations703
 949
Asset retirement obligations, deferred2,233
 1,737
Other deferred credits and liabilities199
 347
Total deferred credits and other liabilities9,512
 8,969
Total Liabilities23,213
 21,880
Preferred Stock (See accompanying statements)
45
 45
Preference Stock (See accompanying statements)
221
 221
Common Stockholder's Equity (See accompanying statements)
11,356
 10,719
Total Liabilities and Stockholder's Equity$34,835
 $32,865
Commitments and Contingent Matters (See notes)

 
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CAPITALIZATION
At December 31, 2016 and 2015
Georgia Power Company 2016 Annual Report
 2016
 2015
 2016
 2015
 (in millions) (percent of total)
Long-Term Debt:       
Long-term notes payable —       
Variable rates (0.76% to 0.83% at 1/1/16) due 2016$
 $450
    
3.00% due 2016
 250
    
5.70% due 2017450
 450
    
1.95% to 5.40% due 2018748
 747
    
4.25% due 2019500
 502
    
2.40% due 2021325
 
    
2.85% to 5.95% due 2022-20434,175
 3,850
    
Total long-term notes payable6,198
 6,249
    
Other long-term debt —       
Pollution control revenue bonds —       
1.38% to 4.00% due 2022-2049952
 952
    
Variable rate (0.22% at 1/1/16) due 2016
 4
    
Variable rates (0.77% to 0.87% at 1/1/17) due 2022-2053868
 868
    
FFB loans —       
2.57% to 3.86% due 202044
 37
    
2.57% to 3.86% due 202144
 37
    
2.57% to 3.86% due 2022-20442,537
 2,126
    
Total other long-term debt4,445
 4,024
    
Capitalized lease obligations169
 183
    
Unamortized debt premium (discount), net(10) (10)    
Unamortized debt issuance expense(117) (118)    
Total long-term debt (annual interest requirement — $402 million)10,685
 10,328
    
Less amount due within one year460
 712
    
Long-term debt excluding amount due within one year10,225
 9,616
 46.8% 46.7%
Preferred and Preference Stock:       
Non-cumulative preferred stock       
$25 par value — 6.125%       
Authorized — 50,000,000 shares       
Outstanding — 1,800,000 shares45
 45
    
Non-cumulative preference stock       
$100 par value — 6.50%       
Authorized — 15,000,000 shares       
Outstanding — 2,250,000 shares221
 221
    
Total preferred and preference stock
(annual dividend requirement — $17 million)
266
 266
 1.2
 1.3
Common Stockholder's Equity:       
Common stock, without par value —       
Authorized — 20,000,000 shares
 
    
Outstanding — 9,261,500 shares398
 398
    
Paid-in capital6,885
 6,275
    
Retained earnings4,086
 4,061
    
Accumulated other comprehensive loss(13) (15)    
Total common stockholder's equity11,356
 10,719
 52.0
 52.0
Total Capitalization$21,847
 $20,601
 100.0% 100.0%
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2016, 2015, and 2014
Georgia Power Company 2016 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20139
 $398
 $5,633
 $3,565
 $(5) $9,591
Net income after dividends on preferred
and preference stock

 
 
 1,225
 
 1,225
Capital contributions from parent company
 
 563
 
 
 563
Other comprehensive income (loss)
 
 
 
 (3) (3)
Cash dividends on common stock
 
 
 (954) 
 (954)
Other
 
 
 (1) 
 (1)
Balance at December 31, 20149
 398
 6,196
 3,835
 (8) 10,421
Net income after dividends on preferred
and preference stock

 
 
 1,260
 
 1,260
Capital contributions from parent company
 
 79
 
 
 79
Other comprehensive income (loss)
 
 
 
 (7) (7)
Cash dividends on common stock
 
 
 (1,034) 
 (1,034)
Balance at December 31, 20159
 398
 6,275
 4,061
 (15) 10,719
Net income after dividends on preferred
and preference stock

 
 
 1,330
 
 1,330
Capital contributions from parent company
 
 610
 
 
 610
Other comprehensive income (loss)
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (1,305) 
 (1,305)
Balance at December 31, 20169
 $398
 $6,885
 $4,086
 $(13) $11,356
The accompanying notes are an integral part of these financial statements.

NOTES TO FINANCIAL STATEMENTS
Georgia Power Company 2016 Annual Report




Index to the Notes to Financial Statements



NOTES (continued)
Georgia Power Company 2016 Annual Report

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
Georgia Power Company (the Company) is a wholly-owned subsidiaryextensive analysis of Southern Company, which is the parent company of the Company and three other traditional electric operating companies, as well as Southern Power, Southern Company Gas (as of July 1, 2016), SCS, Southern LINC, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure, Inc. (PowerSecure) (as of May 9, 2016), and other direct and indirect subsidiaries. The traditional electric operating companies – the Company, Alabama Power, Gulf Power, and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. The Company provides electric service to retail customers within its traditional service territory located within the State of Georgia and to wholesale customers in the Southeast. Southern Power constructs, acquires, owns, and manages generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through utilities in seven states and is involved in several other complementary businesses including gas marketing services, wholesale gas services, and gas midstream operations. SCS, the system service company, provides, at cost, specialized services to Southern CompanyCompany's and its subsidiary companies. Southern LINC provides digital wireless communications for use by Southern Companysubsidiaries' current financial position and its subsidiary companies and also markets these services to the public and provides fiber cable services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants, including the Company's Plant Hatch and Plant Vogtle. PowerSecure is a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure.
The equity method is used for subsidiaries in which the Company has significant influence but does not control.
The Company is subject to regulation by the FERC and the Georgia PSC. As such, the Company's financial statements reflect the effects of rate regulation in accordance with GAAP and comply with the accounting policies and practices prescribed by its regulatory commissions. The preparation of financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates. Certain prior years' data presented in the financial statements have been reclassified to conform to the current year presentation.
In June 2015, the Company identified an error affecting the billing to a small number of large commercial and industrial customers under a rate plan allowing for variable demand-driven pricing from January 1, 2013 to June 30, 2015. In the second quarter 2015, the Company recorded an out of period adjustment of approximately $75 million to decrease retail revenues, resulting in a decrease to net income of approximately $47 million. The Company evaluated the effects of this error on the interim and annual periods that included the billing error. Based on an analysis of qualitative and quantitative factors, the Company determined the error was not material to any affected period and, therefore, an amendment of previously filed financial statements was not required.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it is expected to have a material impact on the Company's financial statements.

NOTES (continued)
Georgia Power Company 2016 Annual Report

The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Notes 5, 8, and 12 for disclosures impacted by ASU 2016-09.including currently available information about future years, to estimate when future taxable income will be realized.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred state income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognizetax liabilities and assets are estimated based on laws of multiple states that determine the income tax consequencesto be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of an affiliate transfer of an asset other than inventory whentaxable income, primarily using sales, assets, or payroll within the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
Affiliate Transactions
The Company has an agreement with SCS under which the following services are renderedjurisdiction compared to the Company at directconsolidated totals. In addition, each state varies as to whether a stand-alone, combined, or allocated cost: generalunitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and design engineering, operations, purchasing, accounting, finance and treasury, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, and other services with respect to business and operations, construction management, and power pool transactions. Costs for these services amounted to $606 million, $585 million, and $555 million in 2016, 2015, and 2014, respectively. Cost allocationfiling methodologies used by SCS prior to the repeal of the Public Utility Holding Company Act of 1935, as amended, were approved by the SEC. Subsequently, additional cost allocation methodologies have been reported to the FERC and management believes they are reasonable. The FERC permits services to be rendered at cost by system service companies.
The Company has an agreement with Southern Nuclear under which the following nuclear-related services are rendered to the Company at cost: general executive and advisory services; general operations, management, and technical services; administrative services including procurement, accounting, employee relations, systems, and procedures services; strategic planning and budgeting services; and other services with respect to business, operations, and construction management. Costs for these services amounted to $666 million, $681 million, and $643 million in 2016, 2015, and 2014, respectively.
The Company has entered into several PPAs with Southern Power for capacity and energy. Expenses associated with these PPAs were $265 million, $179 million, and $144 million in 2016, 2015, and 2014, respectively. See Note 7 under "Fuel and Purchased Power Agreements" for additional information.
The Company has a joint ownership agreement with Gulf Power under which Gulf Power owns a 25% portion of Plant Scherer Unit 3. Under this agreement, the Company operates Plant Scherer Unit 3 and Gulf Power reimburses the Company for its 25% proportionate share of the related non-fuel expenses, which were $8 million, $12 million, and $9 million in 2016, 2015, and 2014, respectively. See Note 4 for additional information.

NOTES (continued)
Georgia Power Company 2016 Annual Report

In 2014, prior to Southern Company's acquisition of PowerSecure on May 9, 2016, the Company entered into agreements with PowerSecure to build solar power generation facilities at two U.S. Army bases, as approved by the Georgia PSC. On October 4, 2016, the two facilities began commercial operation. Payments of approximately $118 million made by the Company to PowerSecure under the agreements since 2014 are included in utility plant in service at December 31, 2016.
On September 1, 2016, Southern Company Gas acquired a 50% equity interest in Southern Natural Gas Company, L.L.C. (SNG). Prior to completion of the acquisition, SCS, as agent for the Company, had entered into a long-term interstate natural gas transportation agreement with SNG. The interstate transportation service provided to the Company by SNG pursuant to this agreement is governed by the terms and conditions of SNG's natural gas tariff and is subject to FERC regulation. For the period subsequent to Southern Company Gas' investment in SNG through December 31, 2016, transportation costs under this agreement were approximately $35 million.
Prior to Southern Company's acquisition of Southern Company Gas, SCS, as agent for the Company, had agreements with certain subsidiaries of Southern Company Gas to purchase natural gas. For the period subsequent to Southern Company's acquisition of Southern Company Gas through December 31, 2016, natural gas purchases made by the Company from Southern Company Gas' subsidiaries were approximately $10 million.
The Company provides incidental services to and receives such services from other Southern Company subsidiaries which are generally minor in duration and amount. Except as described herein, the Company neither provided nor received any material services to or from affiliates in 2016, 2015, or 2014.
The traditional electric operating companies, including the Company, and Southern Power may jointly enter into various types of wholesale energy, natural gas, and certain other contracts, either directly or through SCS as agent. Each participating company may be jointly and severally liable for the obligations incurred under these agreements. See Note 7 under "Fuel and Purchased Power Agreements" for additional information.
Regulatory Assets and Liabilities
The Company is subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers throughapply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Regulatory assets and (liabilities) reflected in the balance sheets at December 31 relate to:
 2016 2015 Note
 (in millions)  
Retiree benefit plans$1,348
 $1,307
 (a, j)
Deferred income tax charges681
 683
 (b, j)
Loss on reacquired debt137
 150
 (c, j)
Asset retirement obligations893
 411
 (b, j)
Vacation pay91
 91
 (d, j)
Cancelled construction projects44
 56
 (e)
Remaining net book value of retired assets166
 171
 (f)
Storm damage reserves206
 92
 (g)
Other regulatory assets97
 110
 (h)
Other cost of removal obligations3
 (31) (b)
Deferred income tax credits(121) (105) (b, j)
Other regulatory liabilities(39) (2) (i, j)
Total regulatory assets (liabilities), net$3,506
 $2,933
  
Note: The recovery and amortization periods for these regulatory assets and (liabilities) are as follows:
(a)Recovered and amortized over the average remaining service period which may range up to 13 years. See Note 2 for additional information.
(b)Asset retirement and other cost of removal obligations and deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 70 years. Asset retirement and removal liabilities will be settled and trued up following completion of the related activities. Included in the deferred income tax assets is $26 million for the retiree Medicare drug subsidy, which is recovered and amortized, as approved by the Georgia PSC, through 2022.
(c)Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue, which currently does not exceed 36 years.
(d)Recorded as earned by employees and recovered as paid, generally within one year. This includes both vacation and banked holiday pay.
(e)Costs associated with construction of environmental controls that will not be completed as a result of unit retirements are being amortized as approved by the Georgia PSC over periods not exceeding nine years or through 2022.
(f)Amortized as approved by the Georgia PSC over periods not exceeding 10 years or through 2024. The net book value of Plant Mitchell Unit 3 at December 31, 2016 was $12 million, which will continue to be amortized through December 31, 2019 as provided in the 2013 ARP. Amortization of the remaining net book value of Plant Mitchell Unit 3 at December 31, 2019, which is expected to be approximately $5 million, and $31 million related to obsolete inventories of certain retired units will be determined by the Georgia PSC in the 2019 base rate case. See Note 3 under "Retail Regulatory Matters – Integrated Resource Plan" for additional information.
(g)Previous under-recovery as of December 2013 is recorded and recovered or amortized as approved by the Georgia PSC through 2019. Amortization of $185 million related to the under-recovery from January 2014 through December 2016 will be determined by the Georgia PSC in the 2019 base rate case. See Note 3 for additional information.
(h)Comprised of several components including deferred nuclear outages, environmental remediation, building lease, and demand-side management tariff under-recovery. Deferred nuclear outages are recorded and recovered or amortized over the outage cycles of each nuclear unit, which does not exceed 24 months. The building lease is recorded and recovered or amortized as approved by the Georgia PSC through 2020. The amortization of environmental remediation and demand-side management tariff under-recovery of $46 million at December 31, 2016 will be determined by the Georgia PSC in the 2019 base rate case.
(i)Comprised primarily of fuel-hedging gains, which upon final settlement are refunded through the Company's fuel cost recovery mechanism.
(j)Generally not earning a return as they are excluded from rate base or are offset in rate base by a corresponding asset or liability.
In the event that a portionfinancial statements of the Company's operations is no longer subject to applicable accounting rules for rate regulation,Registrants.
Given the Company would be required to write off to income or reclassify to accumulated OCI related regulatory assetssignificant judgment involved in estimating NOL and liabilities that are not specifically recoverable through regulated rates. In addition, the Company would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets and liabilities are to be reflected in rates. See Note 3 under "Retail Regulatory Matters" for additional information.
Revenues
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amount billable under the contract terms. Energy and other revenues are recognized as services are provided. Unbilled revenues related to retail sales are accrued at the end of each fiscal period. Electric rates for the Company include provisions to adjust billings for fluctuations in fuel costs, the energy component of purchased power costs, and certain other costs. Revenues are adjusted for differences between the actual recoverable costs and amounts billed in current regulated rates.

NOTES (continued)
Georgia Power Company 2016 Annual Report

The Company has a diversified base of customers. No single customer or industry comprises 10% or more of revenues. For all periods presented, uncollectible accounts averaged less than 1% of revenues.
Fuel Costs
Fuel costs are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. Fuel expense also includes the amortization of the cost of nuclear fuel.
Income and Other Taxes
The Company uses the liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. Taxes that are collected from customers on behalf of governmental agencies to be remitted to these agencies are presented net on the statements of income.
Federal ITCs utilized are deferred and amortized to income as a credit to reduce depreciation over the average life of the related property. The Company had $83 million in federal ITCs at December 31, 2016 that will expire by 2036. State ITCs are recognized in the period in which the credits are generated. The Company had state investment and other tax credit carryforwards totaling $345 million at December 31, 2016, which will expire between 2019 and 2027multi-state apportionments for all subsidiaries, the applicable Registrants consider deferred income tax liabilities and are expectedassets to be fully utilized by 2023.critical accounting estimates.
The Company recognizes tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 5 under "Unrecognized Tax Benefits" for additional information.
Property, Plant, and Equipment
Property, plant, and equipment is stated at original cost less any regulatory disallowances and impairments. Original cost includes: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the cost of equity and debt funds used during construction.
The Company's property, plant, and equipment in service consisted of the following at December 31:
 2016 2015
 (in millions)
Generation$16,668
 $15,386
Transmission5,779
 5,355
Distribution9,553
 9,151
General1,813
 1,921
Plant acquisition adjustment28
 28
Total plant in service$33,841
 $31,841
The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed with the exception of certain generating plant maintenance costs. As mandated by the Georgia PSC, the Company defers and amortizes nuclear refueling outage costs over the unit's operating cycle. The refueling cycles are 18 and 24 months for Plant Vogtle Units 1 and 2 and Plant Hatch Units 1 and 2, respectively.
Depreciation and Amortization
Depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates, which approximated 2.8% in 2016, 2.7% in 2015, and 2.7% in 2014. Depreciation studies are conducted periodically to update the composite rates that are approved by the Georgia PSC and the FERC. When property subject to depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the plant are retired when the related property unit is retired.
Under the terms of the 2013 ARP, the Company amortized approximately $14 million in each of 2014, 2015, and 2016 of its remaining regulatory liability related to other cost of removal obligations.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Asset Retirement Obligations (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Other Costs of RemovalSouthern Company Gas)
AROs are computed as the present value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. The Company has received accounting guidance from the Georgia PSC allowing the continued accrual and recovery of other retirement costs for long-lived assets that the Company does not have a legal obligation to retire. Accordingly, the accumulated removal costs for future obligations are reflected in the balance sheets as a regulatory liability and amounts to be recovered are reflected in the balance sheets as a regulatory asset.
The ARO liabilityliabilities for the traditional electric operating companies primarily relatesrelate to the Company's ash ponds, landfills, and gypsum cellsfacilities that are subject to the Disposal of Coal Combustion Residuals from Electric Utilities final rule published byCCR Rule and the EPA in April 2015 (CCR Rule).related state rules, principally ash ponds. In addition, the Company hasAlabama Power and Georgia Power have retirement obligations related to the decommissioning of the Company's nuclear facilities which include the Company's(Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2,2). The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and asbestos removal. sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and for Mississippi Power, mine reclamation and water wells.
The traditional electric operating companies and Southern Company Gas also hashave identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, includingcertain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers;transformers, leasehold improvements;improvements, equipment on customer property;property, and property associated with the Company'sSouthern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

assets have not been recorded because the settlement timing for thecertain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROsretirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO. The Company will continue to recognize in the statements of income allowed removal costs in accordance with its regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability in the balance sheets as ordered by the Georgia PSC. See "Nuclear Decommissioning" herein for additional information on amounts included in rates.
Details of the AROs included in the balance sheets are as follows:
 2016 2015
 (in millions)
Balance at beginning of year$1,916
 $1,255
Liabilities incurred
 6
Liabilities settled(123) (30)
Accretion77
 56
Cash flow revisions662
 629
Balance at end of year$2,532
 $1,916
The increase in cash flow revisions in 2016 is primarily related to changes to the Company's closure strategy for ash ponds, landfills, and gypsum cells AROs.
The increase in cash flow revisions in 2015 is primarily related to changes to the Company's ash ponds, landfills, and gypsum cells ARO closure dollar and timing estimates associated with the CCR Rule and revisions to the nuclear decommissioning AROs based on the latest decommissioning study.
The cost estimates for AROs related to the disposal of CCR Rule are based on information as of December 31, 2016 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. As further analysis is performed, including evaluation ofand the expected method of compliance, refinement of assumptions underlying therelated state rules. The traditional electric operating companies expect to update their ARO cost estimates suchperiodically as additional information related to these assumptions becomes available. See Note 6 to the quantitiesfinancial statements for additional information, including increases to AROs related to ash ponds recorded during 2019 by certain Registrants.
Given the significant judgment involved in estimating AROs, the applicable Registrants consider the liabilities for AROs to be critical accounting estimates.
Pension and Other Postretirement Benefits (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The applicable Registrants' calculations of CCR at each site,pension and other postretirement benefits expense are dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term rate of return (LRR) on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the determinationrecorded obligation in future periods. While the applicable Registrants believe the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect their pension and other postretirement benefit costs and obligations.
Key elements in determining the applicable Registrants' pension and other postretirement benefit expense are the LRR and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. For purposes of timing with respect to compliance activities, includingdetermining the potential for closing ash ponds priorapplicable Registrants' liabilities related to the endpension and other postretirement benefit plans, Southern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of their currently anticipated useful life,market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. The discount rate assumption impacts both the Company expects to continue to periodically update these estimates.
Nuclear Decommissioning
The NRC requires licenseesservice cost and non-service costs components of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. The Company has external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and the Georgia PSC,net periodic benefit costs as well as the IRS. Whileprojected benefit obligations.
The LRR on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations that consider external actuarial advice, and represents the average rate of earnings expected over the long term on the assets invested to provide for anticipated future benefit payments. Southern Company determines the amount of the expected return on plan assets component of non-service costs by applying the LRR of various asset classes to Southern Company's target asset allocation. The LRR only impacts the non-service costs component of net periodic benefit costs for the following year and is set annually at the beginning of the year.
For 2019, the LRR assumption for qualified pension plan assets was reduced from 7.95% to 7.75% for purposes of determining net periodic pension expense as a result of changes in the economic outlook used in estimating the expected returns as of December 31, 2018. As a result of the decrease in the LRR, the non-service costs component of net periodic pension expense increased by $24 million for the Southern Company system in 2019. See the table below for the impact on each Registrant.


NOTESCOMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Georgia PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Company is allowedFor 2020, net periodic pension expense will be impacted by two factors: a change in the approach used to prescribe an overall investment policydetermine the LRR assumption and cash contributions totaling $1.1 billion to the Funds' managers,qualified pension plan made in December 2019. Historically, Southern Company has set the LRR assumption using asset return modeling based on geometric returns that reflect the compound average returns for dependent annual periods. Beginning in 2020, Southern Company will set the LRR assumption using an arithmetic mean which represents the expected simple average return to be earned by the pension plan assets over any one year. Southern Company believes the use of the arithmetic mean is more compatible with the LRR's function of estimating a single year's investment return. Excluding the additional pension contribution in December 2019, the change in the LRR assumption will reduce the non-service costs component of net periodic pension expense by $78 million for the Southern Company system in 2020. See the table below for the impact on each Registrant. The contributions in 2019 will further reduce expense by $88 million for the Southern Company system in 2020.
 Southern Company
Alabama
Power
Georgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Increase (decrease) in pension expense:   
2019$24
$5
$8
$1
$2
2020(78)(18)(25)(4)(7)
The following table illustrates the sensitivity to changes in the applicable Registrants' long-term assumptions with respect to the discount rate, salary increases, and the long-term rate of return on plan assets:
Increase/(Decrease) in
25 Basis Point Change in:Total Benefit Expense for 2020Projected Obligation for Pension Plan at December 31, 2019
Projected Obligation for
Other Postretirement
Benefit Plans at December 31, 2019
(in millions)
Discount rate:
Southern Company$41/$(39)$549/$(518)$57/$(54)
Alabama Power$10/$(10)$131/$(123)$14/$(13)
Georgia Power$12/$(11)$166/$(156)$21/$(20)
Mississippi Power$2/$(2)$25/$(23)$2/$(2)
Southern Company Gas$1/$(1)$38/$(36)$6/$(6)
Salaries:
Southern Company$23/$(22)$118/$(113)$–/$–
Alabama Power$6/$(6)$33/$(32)$–/$–
Georgia Power$6/$(6)$34/$(33)$–/$–
Mississippi Power$1/$(1)$5/$(5)$–/$–
Southern Company Gas$1/$(1)$3/$(3)$–/$–
Long-term return on plan assets:
Southern Company$35/$(35)N/AN/A
Alabama Power$9/$(9)N/AN/A
Georgia Power$11/$(11)N/AN/A
Mississippi Power$2/$(2)N/AN/A
Southern Company Gas$3/$(3)N/AN/A
See Note 11 to the financial statements for additional information regarding pension and other postretirement benefits.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and its affiliates are not allowedSubsidiary Companies 2019 Annual Report

Asset Impairment (Southern Company, Southern Power, and Southern Company Gas)
Goodwill (Southern Company and Southern Company Gas)
The acquisition method of accounting requires the assets acquired and liabilities assumed to engagebe recorded at the date of acquisition at their respective estimated fair values. The applicable Registrants have recognized goodwill as of the date of their acquisitions, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the day-to-day managementfourth quarter of the Fundsyear as well as on an interim basis as events and changes in circumstances occur, including, but not limited to, a significant change in operating performance, the business climate, legal or to mandate individual investment decisions. Day-to-day managementregulatory factors, or a planned sale or disposition of a significant portion of the investments inbusiness. A reporting unit is the Fundsoperating segment, or a business one level below the operating segment (a component), if discrete financial information is delegated to unrelated third party managers with oversightprepared and regularly reviewed by the managementmanagement. Components are aggregated if they have similar economic characteristics.
As part of the Company. The Funds' managers are authorized, within certain investment guidelines,impairment tests, the applicable Registrant may perform an initial qualitative assessment to actively buy and sell securities at their own discretion in order to maximizedetermine whether it is more likely than not that the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
The Company records the investment securities held in the Funds at fair value as disclosed in Note 10, as management believesof each reporting unit is less than its carrying amount before applying the quantitative goodwill impairment test. If the applicable Registrant elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If the applicable Registrant determines that it is more likely than not that the fair value best representsof a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it compares the nature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value adjustments and realized gains and losses are determined on a specific identification basis.
The Funds participate in a securities lending program through the managers of the Funds. Under this program, the Funds' investment securities are loaned to institutional investors for a fee. Securities loaned are fully collateralized by cash, letters of credit, and/or securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. As of December 31, 2016 and 2015, approximately $56 million and $76 million, respectively, of the fair market value of the Funds' securities were on loan and pledged to creditors under the Funds' managers' securities lending program. The fair value of the collateral receivedreporting unit to its carrying value to determine if the fair value is greater than its carrying value.
Goodwill for Southern Company and Southern Company Gas was approximately $58 million$5.3 billion and $78 million$5.0 billion, respectively, at December 31, 20162019. For its 2019 and 2015, respectively,2018 annual impairment tests, Southern Company Gas performed the qualitative assessment and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For its 2017 annual impairment test, Southern Company Gas performed the quantitative assessment, which resulted in the fair value of all of its reporting units that have goodwill exceeding their carrying value. For its annual impairment tests for PowerSecure, Southern Company performed the quantitative assessment, which resulted in the fair value of goodwill at PowerSecure exceeding its carrying value in all years presented. However, Southern Company recorded goodwill impairment charges totaling $34 million in 2019 as a result of its decision to sell certain PowerSecure business units. See Note 15 to the financial statements under "Southern Company" for additional information.
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can only be sold bysignificantly impact the borrower uponapplicable Registrant's results of operations. Fair values and useful lives are determined based on, among other factors, the returnexpected future period of benefit of the loaned securities. The collateral received is treated as a non-cash item inasset, the statements of cash flows.
At December 31, 2016, investment securities in the Funds totaled $814 million, consisting of equity securities of $326 million, debt securities of $477 million, and $11 million of other securities. At December 31, 2015, investment securities in the Funds totaled $775 million, consisting of equity securities of $296 million, debt securities of $463 million, and $16 million of other securities. These amounts include the investment securities pledged to creditors and collateral received, and exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases and the lending pool.
Salesvarious characteristics of the securities held inasset, and projected cash flows. As the Funds resulted in cash proceedsdetermination of $803 million, $980 million, and $669 million in 2016, 2015, and 2014, respectively, all of which were reinvested. For 2016,an asset's fair value increases, including reinvested interest and dividendsuseful life involves management making certain estimates and excludingbecause these estimates form the Funds' expenses, were $38 million, which included $14 million related to unrealized gains on securities held inbasis for the Funds at December 31, 2016. For 2015, fair value increases, including reinvested interest and dividends and excludingdetermination of whether or not an impairment charge should be recorded, the Funds' expenses, were $3 million, which included $26 million related to unrealized losses on securities held in the Funds at December 31, 2015. For 2014, fair value increases, including reinvested interest and dividends and excluding the Funds' expenses, were $44 million, which included an immaterial amount related to unrealized gains and losses on securities held in the Funds at December 31, 2014. While the investment securities held in the Funds are reported as trading securities, the Funds continueapplicable Registrants consider these estimates to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.critical accounting estimates.
The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. The Company has filed plans with the NRC designed to ensure that, over time, the deposits and earnings of the Funds will provide the minimum funding amounts prescribed by the NRC.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Site study cost is the estimate to decommission a specific facility as of the site study year. The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may vary from these estimates because of changes in the assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates. The estimated costs of decommissioning are based on the most current study performed in 2015. The site study costs and external trust funds for decommissioning as of December 31, 2016 based on the Company's ownership interests were as follows:
 Plant Hatch 
Plant Vogtle
Units 1 and 2
Decommissioning periods:   
Beginning year2034
 2047
Completion year2075
 2079
 (in millions)
Site study costs: 
Radiated structures$678
 $568
Spent fuel management160
 147
Non-radiated structures64
 89
Total site study costs$902
 $804
External trust funds$511
 $303
For ratemaking purposes, the Company's decommissioning costs are based on the NRC generic estimate to decommission the radioactive portion of the facilities and the site study estimate for spent fuel management as of 2012. Under the 2013 ARP, the Georgia PSC approved annual decommissioning cost for ratemaking of $4 million and $2 million for Plant Hatch and Plant Vogtle Units 1 and 2, respectively. Significant assumptions used to determine the costs for ratemaking include an estimated inflation rate of 2.4% and an estimated trust earnings rate of 4.4%. The Company expects the Georgia PSC to review and adjust, if necessary, the amounts collected in rates for nuclear decommissioning costs in the Company's 2019 base rate case.
Allowance for Funds Used During Construction
The Company records AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the plant through a higher rate base and higher depreciation. The equity component of AFUDC is not included in calculating taxable income. For the years 2016, 2015, and 2014, the average AFUDC rates were 6.9%, 6.5%, and 5.6%, respectively, and AFUDC capitalized was $68 million, $56 million, and $62 million, respectively. AFUDC, net of income taxes, was 4.6%, 3.9%, and 4.6% of net income after dividends on preferred and preference stock for 2016, 2015, and 2014, respectively. See Note 31 to the financial statements under "Retail Regulatory Matters – Nuclear Construction""Goodwill and Other Intangible Assets and Liabilities" for additional information onregarding the inclusionapplicable Registrants' goodwill.
Long-Lived Assets (Southern Company, Southern Power, and Southern Company Gas)
Impairments of construction costslong-lived assets of the traditional electric utilities and natural gas distribution utilities are generally related to Plant Vogtle Units 3 and 4 in rate base effective January 1, 2011.
Impairment of Long-Lived Assets and Intangibles
specific regulatory disallowances. The Company evaluatesapplicable Registrants assess their other long-lived assets for impairment whenwhenever events or changes in circumstances indicate that thean asset's carrying value of such assetsamount may not be recoverable. The determinationIf an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of whether an impairment has occurred is based on either a specific regulatory disallowance or anthe undiscounted expected future cash flows directly attributable to the asset's use and eventual disposition. If the estimate of undiscounted future cash flows attributable to the assets, as compared withis less than the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by either the amount of regulatory disallowance or by estimatingasset, the fair value of the assetsasset is determined and recording a loss ifis recorded equal to the difference between the carrying value is greater thanand the fair value. Forvalue of the asset. In addition, when assets are identified as held for sale, an impairment loss is recognized to the extent the carrying value of the assets or asset group exceeds their fair value less cost to sell. A high degree of judgment is comparedrequired in developing estimates related to these evaluations, which are based on projections of various factors, some of which have been quite volatile in recent years.
Southern Power's investments in long-lived assets are primarily generation assets, whether in service or under construction. Excluding the natural gas distribution utilities, Southern Company Gas' investments in long-lived assets are primarily natural gas transportation and storage facility assets, whether in service or under construction. In addition, exclusive of the traditional electric operating companies and natural gas distribution utilities, Southern Company's investments in long-lived assets also include investments in leveraged leases.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

For Southern Power, examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to remarket generating capacity for an extended period, the unplanned termination of a customer contract or the inability of a customer to perform under the terms of the contract, or the inability to deploy wind turbine equipment to a development project. For Southern Company Gas, examples of impairment indicators could include, but are not limited to, significant changes in the U.S. natural gas storage market, construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to renew or extend customer contracts or the inability of a customer to perform under the terms of the contract, attrition rates, or the inability to deploy a development project. For Southern Company's investments in leveraged leases, impairment indicators include changes in estimates of future rental payments to be received under the lease as well as the residual value of the leased asset at the end of the lease.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 3 to the financial statements under "Other Matters" and Note 15 to the financial statements for information on certain assets recently evaluated for impairment.
Derivatives and Hedging Activities (Southern Company and Southern Company Gas)
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in the applicable Registrant's assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value lessof derivative instruments may change significantly from period to period depending upon market conditions, and changes in hedge effectiveness may impact the costaccounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. If the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempt from fair value accounting treatment and is, instead, subject to selltraditional accrual accounting. The applicable Registrant utilizes market data or assumptions that market participants would use in orderpricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI on the balance sheets until the hedged transaction affects earnings in the case of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as document and assess the effectiveness of derivatives associated with transactions that receive hedge accounting treatment.
Southern Company Gas uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and, to a lesser extent, Southern Company Gas hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that Southern Company Gas would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
Derivative assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of nonperformance risk on liabilities.
A significant change in the underlying market prices or pricing assumptions used in pricing derivative assets or liabilities may result in a significant financial statement impact.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Given the assumptions used in pricing the derivative asset or liability, Southern Company and Southern Company Gas consider the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Note 14 to the financial statements for more information.
Revenue Recognition (Southern Power)
Southern Power's power sale transactions, which include PPAs, are classified in one of four general categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges, as described further below. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 14 to the financial statements. Southern Power's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
Southern Power considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;
Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the counterparty substantially all of the economic benefits and the right to direct the use of the asset.
If the contract meets the above criteria for a lease, Southern Power performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of Southern Power's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in Southern Power's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered. See Note 9 to the financial statements for additional information.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, Southern Power further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within Southern Power's available generating capacity) are accounted for as executory contracts. For contracts that have a capacity charge, the revenue is generally recognized in the period that it becomes billable. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. See Note 4 to the financial statements for additional information.
Cash Flow Hedge Transactions
Southern Power further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and
Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Derivative (Non-Hedge) Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Acquisition Accounting (Southern Power)
Southern Power may acquire generation assets as part of its overall growth strategy. At the time of an acquisition, Southern Power will assess if these assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, the purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets, primarily related to acquired PPAs). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired.
Determining the fair value of assets acquired and liabilities assumed requires management judgment and Southern Power may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions, and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by Southern Power for potential or successful acquisitions are expensed as incurred.
Contingent consideration primarily relates to fixed amounts due to the seller once the facility is placed in service. For contingent consideration with variable payments, Southern Power fair values the arrangement with any changes recorded in the consolidated statements of income. See Note 13 to the financial statements for additional fair value information and Note 15 to the financial statements for additional information on recent acquisitions.
Variable Interest Entities (Southern Power)
Southern Power enters into partnerships with varying ownership structures. Upon entering into such arrangements, membership interests and other variable interests are evaluated to determine if an impairmentthe legal entity is a VIE. If the legal entity is a VIE, Southern Power will assess if it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE, making it the primary beneficiary. Making this determination may require significant management judgment.
If Southern Power is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. If Southern Power is not the primary beneficiary, the legal entity is generally accounted for under the equity method of accounting. Southern Power reconsiders its conclusions as to whether the legal entity is a VIE and whether it is the primary beneficiary for events that impact the rights of variable interests, such as ownership changes in membership interests.
Southern Power has partial ownership in certain legal entities for which the contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits are not based on fixed ownership percentages. For these arrangements, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period.
Contingent Obligations (All Registrants)
The Registrants are subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject them to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Notes 2 and 3 to the financial statements for more information regarding certain of these contingencies. The Registrants periodically evaluate their exposure to such risks and record reserves for those matters where a non-tax-related loss is required. Untilconsidered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect the results of operations, cash flows, or financial condition of the Registrants.
Recently Issued Accounting Standards
See Note 1 to the financial statements under "Recently Adopted Accounting Standards" for additional information.
In 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. The Registrants adopted the new standard effective January 1, 2019. See Note 9 to the financial statements for additional information and related disclosures.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

FINANCIAL CONDITION AND LIQUIDITY
Overview
The financial condition of each Registrant remained stable at December 31, 2019. The Registrants' cash requirements primarily consist of funding ongoing operations, including unconsolidated subsidiaries, as well as common stock dividends, capital expenditures, and debt maturities. Southern Power's cash requirements also include distributions to noncontrolling interests. Capital expenditures and other investing activities for the traditional electric operating companies include investments to meet projected long-term demand requirements, including to build new generation facilities, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Southern Power's capital expenditures and other investing activities may include acquisitions or new construction associated with its overall growth strategy and to maintain its existing generation fleet's performance. Southern Company Gas' capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations.
Operating cash flows provide a substantial portion of the Registrants' cash needs. During 2019, Southern Power utilized tax credits, which provided $734 million in operating cash flows. For the three-year period from 2020 through 2022, each Registrant's projected stock dividends, capital expenditures, and debt maturities, as well as distributions to noncontrolling interests for Southern Power, are expected to exceed its operating cash flows. Southern Company plans to finance future cash needs in excess of its operating cash flows primarily by accessing borrowings from financial institutions and issuing debt and hybrid securities in the capital markets. Each Subsidiary Registrant plans to finance its future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings through the FFB and Southern Power plans to utilize tax equity partnership contributions. The Registrants plan to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs and continue to monitor their access to short-term and long-term capital markets as well as their bank credit arrangements to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," "Capital Requirements," and "Contractual Obligations" herein for additional information.
The Registrants' investments in their qualified pension plans and Alabama Power's and Georgia Power's investments in their nuclear decommissioning trust funds increased in value at December 31, 2019 as compared to December 31, 2018. In December 2019, the Registrants voluntarily contributed the following amounts to the qualified pension plan:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Contributions to qualified pension plan$1,136
$362
$200
$54
$24
$145
No mandatory contributions to the qualified pension plans are anticipated during 2020. See "Contractual Obligations" herein and Notes 6 and 11 to the financial statements under "Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
At the end of 2019, the market price of Southern Company's common stock was $63.70 per share (based on the closing price as reported on the NYSE) and the book value was $26.11 per share, representing a market-to-book value ratio of 244%, compared to $43.92, $23.91, and 184%, respectively, at the end of 2018.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Analysis of Cash Flows
Net cash flows provided from (used for) operating, investing, and financing activities in 2019 and 2018 are presented in the following table:
Net cash provided from (used for):Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Operating activities$5,781
$1,779
$2,907
$339
$1,385
$1,067
Investing activities(3,392)(1,963)(3,885)(263)(167)(1,386)
Financing activities(1,930)765
918
(83)(1,120)298
       
2018      
Operating activities$6,945
$1,881
$2,769
$804
$631
$764
Investing activities(5,760)(2,289)(3,109)(232)(227)998
Financing activities(1,813)177
(400)(527)(363)(1,770)
Fluctuations in cash flows from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Southern Company
Net cash provided from operating activities decreased $1.2 billion in 2019 as compared to 2018 primarily due to the voluntary contribution to the qualified pension plan and the timing of vendor payments.
The net cash used for investing activities in 2019 and 2018 was primarily due to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, and capital expenditures for Southern Company Gas' infrastructure replacement programs, partially offset by proceeds from the sale transactions described in Note 15 to the financial statements, which totaled $5.1 billion and $3.0 billion in 2019 and 2018, respectively.
The net cash used for financing activities in 2019 was primarily due to common stock dividend payments and net repayments of short-term bank debt and commercial paper, partially offset by net issuances of long-term debt and the issuance of common stock. The net cash used for financing activities in 2018 was primarily due to net redemptions and repurchases of long-term debt, common stock dividend payments, and a decrease in commercial paper borrowings, partially offset by net issuances of short-term bank debt, proceeds from Southern Power's sales of non-controlling equity interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities, and the issuance of common stock.
Alabama Power
Net cash provided from operating activities decreased $102 million in 2019 as compared to 2018primarily due to the voluntary contribution to the qualified pension plan, partially offset by the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and increased fuel cost recovery.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and a long-term debt issuance, partially offset by payments of common stock dividends and a maturity of long-term debt. The net cash provided from financing activities in 2018 was primarily due to issuances of long-term debt and additional capital contributions from Southern Company, partially offset by the payment of common stock dividends and a maturity of long-term debt.
Georgia Power
Net cash provided from operating activities increased $138 million in 2019 as compared to 2018 primarily due to lower customer refunds and increased fuel cost recovery, partially offset by the voluntary contribution to the qualified pension plan.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions, including a total of $2.5 billion related to the construction of Plant Vogtle Units 3 and 4. See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein for additional information on construction of Plant Vogtle Units 3 and 4.
The net cash provided from financing activities in 2019 was primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, capital contributions from Southern Company, and pollution control revenue bonds reoffered to the public, partially offset by payment of common stock dividends and the maturity of senior notes. The net cash used for financing activities in 2018 was primarily due to the redemption and repurchase of senior notes, payment of common stock dividends, and pollution control revenue bond repurchases, partially offset by capital contributions from Southern Company.
Mississippi Power
Net cash provided from operating activities decreased $465 million in 2019 as compared to 2018 primarily due to higher income tax refunds in 2018 as a result of the tax impact of the abandonment of the Kemper IGCC and the voluntary contribution to the qualified pension plan in 2019.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash used for financing activities in 2019 was primarily due to a return of capital to Southern Company and the redemption of senior notes, partially offset by capital contributions from Southern Company and pollution control revenue bonds reoffered to the public. The net cash used for financing activities in 2018 was primarily due to the redemption of preferred stock, long-term bank debt, short-term borrowings, and senior notes, partially offset by the issuance of senior notes and short-term borrowings.
Southern Power
Net cash provided from operating activities increased $754 million in 2019 as compared to 2018 primarily due to the utilization of federal ITCs totaling $734 million in 2019. At December 31, 2019, Southern Power had $1.4 billion of unutilized ITCs and PTCs which are expected to be fully utilized by 2024. See FUTURE EARNINGS POTENTIAL – "Income Tax MattersTax Credits" herein for additional information.
The net cash used for investing activities in 2019 was primarily due to Southern Power's investment in DSGP and ongoing construction activities, largely offset by proceeds from the sales of Plant Nacogdoches and certain wind turbine equipment. The net cash used for investing activities in 2018 was primarily due to the construction of generating facilities and payments for renewable acquisitions, partially offset by proceeds from the disposition of the Florida Plants. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions" and "Construction Programs" herein and Note 15 to the financial statements for additional information.
The net cash used for financing activities in 2019 was primarily due to returns of capital to Southern Company, the repayment at maturity of senior notes, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by proceeds from net issuances of commercial paper. The net cash used for financing activities in 2018 was primarily due to returns of capital to Southern Company, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by capital contributions from noncontrolling interests.
Southern Company Gas
Net cash provided from operating activities increased $303 million in 2019 as compared to 2018 primarily due to the timing of collection of customer receivables and lower income tax payments, partially offset by the timing of vendor payments and the voluntary contribution to the qualified pension plan.
The net cash used for investing activities in 2019 was primarily due to gross property additions related to utility capital expenditures and infrastructure investments recovered through replacement programs at gas distribution operations and capital contributed to equity method pipeline investments, partially offset by proceeds from the sale of Triton and capital distributions in excess of earnings from equity method pipeline investments. The net cash provided from investing activities in 2018 was primarily due to proceeds from the Southern Company Gas Dispositions, partially offset by gross property additions primarily related to utility capital expenditures and pre-approved rider and infrastructure investments recovered through replacement programs at gas distribution operations as well as net capital contributions to equity method pipeline investments.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and proceeds from the issuance of first mortgage bonds, partially offset by the redemption of long-term debt and payments of common stock dividends. The net cash used for financing activities in 2018 was primarily due to payments of common stock dividends to

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company, return of capital to Southern Company, redemptions of gas facility revenue bonds and senior notes, and repayments of commercial paper borrowings and long-term debt, partially offset by debt issuances and capital contributions from Southern Company.
Significant Balance Sheet Changes
Southern Company
Significant balance sheet changes in 2019 for Southern Company included:
decreases in assets and liabilities held for sale of $5.0 billion and $3.3 billion, respectively, and an increase of $2.7 billion in total stockholders' equity primarily related to the sale of Gulf Power;
an increase of $2.3 billion in total property, plant, and equipment primarily related to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, net of $1.2 billion and $1.0 billion reclassified to other regulatory assets and regulatory assets associated with AROs, respectively, as a result of generating unit retirements at Alabama Power and Georgia Power;
an increase in other regulatory assets of $1.8 billion primarily related to the $1.2 billion reclassification from property, plant, and equipment discussed above and a $0.8 billion increase in regulatory assets associated with retiree benefit plans primarily resulting from a decrease in the overall discount rate used to calculate benefit obligations;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.8 billion, recorded upon the adoption of ASC 842;
an increase of $1.4 billion in regulatory assets associated with AROs primarily related to the $1.0 billion reclassification from property, plant, and equipment discussed above and ARO revisions at Alabama Power and Mississippi Power related to the CCR Rule;
an increase of $1.3 billion in accumulated deferred income taxes primarily related to the expected utilization of tax credit carryforwards in the 2019 tax year as a result of increased taxable income from the sale of Gulf Power; and
a decrease of $0.9 billion in notes payable related to net repayments of short-term bank debt and commercial paper.
See Notes 2, 5, 6, 8, 9, 10, 11, and 15 to the financial statements for additional information.
Alabama Power
Significant balance sheet changes in 2019 for Alabama Power included:
an increase of $1.5 billion in total common stockholder's equity primarily due to a $1.2 billion capital contribution from Southern Company;
increases of $0.9 billion in regulatory assets associated with AROs and $0.7 billion in other regulatory assets, deferred primarily due to the impacts of retiring and reclassifying Plant Gorgas Units 8, 9, and 10;
an increase of $0.6 billion in cash and cash equivalents; and
an increase of $0.3 billion in AROs, deferred primarily due to an increase in the ARO estimate related to ash pond facilities.
See Notes 2 and 6 to the financial statements for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power
Significant balance sheet changes in 2019 for Georgia Power included:
an increase of $1.8 billion in long-term debt (including securities due within one year) primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, and pollution control revenue bonds being reoffered to the public;
an increase of $1.6 billion in property, plant, and equipment to comply with environmental standards and the construction of generation, transmission, and distribution facilities, net of approximately $0.8 billion reclassified to regulatory assets due to the retirement of certain generating units as approved in the Georgia Power 2019 IRP;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.4 billion, recorded upon the adoption of ASC 842;
an increase of $1.2 billion in regulatory assets primarily due to the $0.8 billion reclassification from property, plant, and equipment discussed above and $0.2 billion associated with retiree benefit plans primarily as a result of a decrease in the overall discount rate used to calculate benefit obligations; and
an increase of $742 million in total common stockholder's equity primarily due to capital contributions from Southern Company.
See Notes 2, 8, 9, and 11 to the financial statements for additional information.
Mississippi Power
Significant balance sheet changes in 2019 for Mississippi Power included:
a decrease of $231 million in long-term debt, primarily due to the reclassification of $249 million of senior notes to securities due within one year and the redemption of $25 million of senior notes, partially offset by $43 million in pollution control revenue bonds reoffered to the public;
an increase of $107 million in other property and investments primarily due to a new tolling arrangement accounted for as a sales-type lease;
increases of $67 million in regulatory assets associated with AROs and $31 million in AROs, deferred primarily due to ARO revisions; and
a net change of $57 million in accumulated deferred income tax assets and liabilities primarily due to the recognition of a tax loss on the CO2 pipeline transfer and the alternative minimum tax carryforward from prior years.
See Notes 2, 6, 8, 9, and 10 to the financial statements for additional information.
Southern Power
Significant balance sheet changes in 2019for Southern Power included:
a $662 million decrease in stockholders' equity due to returns of capital to Southern Company;
a $635 million decrease in accumulated deferred income tax assets primarily related to the utilization of tax credits for the 2019 tax year;
a $619 million decrease in long-term debt (including securities due within one year) related to the maturity of $600 million in senior notes;
a $449 million increase in notes payable due to net issuances of commercial paper; and
increases in operating lease right-of-use assets, net of amortization and operating lease obligations totaling $369 million and $376 million, respectively, recorded upon the adoption of ASC 842.
See Notes 8, 9, and 10 to the financial statements for additional information.
Southern Company Gas
Significant balance sheet changes in 2019 for Southern Company Gas included:
an increase of $950 million in property, plant, and equipment primarily due to utility capital expenditures and infrastructure investments recovered through replacement programs, partially offset by $115 million of asset impairment charges;
additional paid-in-capital of $841 million primarily related to capital contributions from Southern Company;
decreases of $373 million and $414 million in energy marketing receivables and payables, respectively, due to lower natural gas prices and volumes of natural gas sold;

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

a $287 million decrease in equity investments in unconsolidated subsidiaries primarily due to $151 million associated with Pivotal LNG and Atlantic Coast Pipeline reclassified to assets held for sale, as well as distributions from SNG and the sale of Triton;
a $203 million increase in accumulated deferred income taxes primarily due to accelerated tax depreciation and other timing differences;
reclassification of $171 million in total assets held for sale associated with Pivotal LNG and Atlantic Coast Pipeline;
a $95 million decrease in long-term debt primarily due to the redemption of $300 million in senior notes and the repayment of $50 million in first mortgage bonds, partially offset by the issuance of $300 million in first mortgage bonds; and
increases of $93 million in operating right-of-use assets and $92 million in operating lease obligations, respectively, related to the adoption of ASC 842.
See Notes 3, 7, 8, 9, 10, and 15 to the financial statements for additional information.
Sources of Capital
Southern Company intends to meet its future capital needs through operating cash flows, borrowings from financial institutions, and debt and equity issuances in the capital markets. Equity capital can be provided from any combination of Southern Company's stock plans, private placements, or public offerings. Southern Company does not expect to issue any equity in the capital markets through 2024.
The Subsidiary Registrants plan to obtain the funds to meet their future capital needs from sources similar to those they used in the past, which were primarily from operating cash flows, external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings from the FFB, as discussed further in Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings," Southern Power plans to utilize tax equity partnership contributions, as discussed further herein, and Southern Company Gas plans to utilize proceeds from the pending sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, as discussed further in Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline."
The amount, type, and timing of any financings in 2020, as well as in subsequent years, will be contingent on investment opportunities and the Registrants' capital requirements and will depend upon prevailing market conditions, regulatory approvals (for the Subsidiary Registrants), and other factors. See "Capital Requirements" herein for additional information.
Southern Power utilizes tax equity partnerships as one of its financing sources, where the tax partner takes significantly all of the federal tax benefits. These tax equity partnerships are disposedconsolidated in Southern Power's financial statements and are accounted for using HLBV methodology to allocate partnership gains and losses. During 2019, Southern Power obtained tax equity funding for the Wildhorse Mountain wind project and received proceeds of $97 million. See Notes 1 and 15 to the financial statements under "General" and "Southern Power," respectively, for additional information.
The issuance of securities by the traditional electric operating companies and Nicor Gas is generally subject to the approval of the applicable state PSC or other applicable state regulatory agency. The issuance of all securities by Mississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the FERC. Additionally, with respect to the public offering of securities, Southern Company, the traditional electric operating companies, and Southern Power (excluding its subsidiaries), Southern Company Gas Capital, and Southern Company Gas (excluding its other subsidiaries) file registration statements with the SEC under the Securities Act of 1933, as amended (1933 Act). The amounts of securities authorized by the appropriate regulatory authorities, as well as the securities registered under the 1933 Act, are closely monitored and appropriate filings are made to ensure flexibility in the capital markets.
The Registrants generally obtain financing separately without credit support from any affiliate. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of each company are not commingled with funds of any other company in the Southern Company system, except in the case of Southern Company Gas, as described below.
The traditional electric operating companies and SEGCO may utilize a Southern Company subsidiary organized to issue and sell commercial paper at their estimated fair valuerequest and for their benefit. Proceeds from such issuances for the benefit of an individual company are loaned directly to that company. The obligations of each traditional electric operating company and SEGCO under these arrangements are several and there is re-evaluatedno cross-affiliate credit support. Alabama Power also maintains its own separate commercial paper program.
Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. Southern Company Gas maintains commercial

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

paper programs at Southern Company Gas Capital and Nicor Gas. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of the other Southern Company Gas subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2019, the amount of subsidiary retained earnings restricted to dividend totaled $951 million. This restriction did not impact Southern Company Gas' ability to meet its cash obligations, nor does management expect such restriction to materially impact Southern Company Gas' ability to meet its currently anticipated cash obligations.
The Registrants' current liabilities frequently exceed their current assets because of long-term debt maturities and the periodic use of short-term debt as a funding source, as well as significant seasonal fluctuations in cash needs. See Note 8 to the financial statements for additional information. Also see "Financing Activities" herein for information on issuances of long-term debt subsequent to December 31, 2019. At December 31, 2019, the following Registrants' current liabilities exceeded their current assets, primarily as a result of securities due within one year and notes payable, as shown in the table below:
At December 31, 2019
Southern Company(*)
Georgia
Power
Mississippi PowerSouthern Power
 (in millions)
Current liabilities in excess of current assets$2,729
$1,902
$125
$945
Securities due within one year2,989
1,025
281
824
Notes payable2,055
365

549
(*)Includes $600 million and $465 million of securities due within one year and notes payable, respectively, at the parent company.
The Registrants believe the need for working capital can be adequately met by utilizing operating cash flows, as well as commercial paper, lines of credit, and short-term bank notes, as market conditions permit. In addition, under certain circumstances, the Subsidiary Registrants may utilize equity contributions and/or loans from Southern Company.
Bank Credit Arrangements
At December 31, 2019, the Registrants' unused committed credit arrangements with banks were as follows:
At December 31, 2019
Southern
Company
parent
Alabama PowerGeorgia
Power
Mississippi Power
Southern
 Power(a)
Southern Company Gas(b)
SEGCO
Southern
Company
 (in millions)
Unused committed credit$1,999
$1,328
$1,733
$150
$591
$1,745
$30
$7,576
(a)At December 31, 2019, Southern Power also had a continuing letter of credit facility for standby letters of credit, of which $23 million was unused. Subsequent to December 31, 2019, Southern Power entered into an additional $60 million continuing letter of credit facility for standby letters of credit. Southern Power's subsidiaries are not parties to its bank credit arrangement or to the letter of credit facilities.
(b)Includes $1.245 billion and $500 million at Southern Company Gas Capital and Nicor Gas, respectively.
Subject to applicable market conditions, the Registrants, Nicor Gas, and SEGCO expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, the Registrants, Nicor Gas, and SEGCO may extend the maturity dates and/or increase or decrease the lending commitments thereunder. A portion of the unused credit with banks is allocated to provide liquidity support to the revenue bonds of the traditional electric operating companies and the commercial paper programs of the Registrants, Nicor Gas, and SEGCO. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
Short-term Borrowings
The Registrants, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Southern Power's subsidiaries are not issuers or obligors under its commercial paper program. Commercial paper and short-term bank term loans are included in notes payable in the balance sheets. Details of the Registrants' short-term borrowings were as follows:

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Short-term Debt at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 December 31, December 31,
 201920182017 201920182017
 (in millions)    
Southern Company$2,055
$2,915
$2,439
 2.1%3.1%1.9%
Alabama Power

3
 

3.7
Georgia Power365
294
150
 2.2
3.1
2.2
Mississippi Power

4
 

3.8
Southern Power549
100
105
 2.2
3.1
2.0
Southern Company Gas:





    
Southern Company Gas Capital$372
$403
$1,243
 2.1%3.1%1.7%
Nicor Gas278
247
275
 1.8
3.0
1.8
Southern Company Gas Total$650
$650
$1,518
 2.0%3.0%1.8%
 
Short-term Debt During the Period(*)
 Average Amount Outstanding 
Weighted Average
Interest Rate
 Maximum Amount Outstanding
 201920182017 201920182017 201920182017
 (in millions)     (in millions)
Southern Company$1,240
$3,377
$2,672
 2.6%2.6%1.5% $2,914
$5,447
$3,668
Alabama Power17
27
25
 2.6
2.3
1.3
 190
258
223
Georgia Power371
139
427
 2.7
2.5
1.8
 935
710
1,460
Mississippi Power
68
18
 
2.0
3.0
 
300
36
Southern Power76
188
232
 2.7
2.5
1.4
 578
385
419
Southern Company Gas:           
Southern Company Gas Capital$302
$520
$723
 2.6%2.3%1.4% $490
$1,361
$1,243
Nicor Gas91
123
176
 2.3
2.2
1.1
 278
275
525
Southern Company Gas Total$393
$643
$899
 2.5%2.3%1.4%    
(*)Average and maximum amounts are based upon daily balances during the 12-month periods ended December 31, 2019, 2018, and 2017.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Financing Activities
The following table outlines the Registrants' long-term debt financing activities for the year ended December 31, 2019:
Company
Senior
Note
Issuances
 
Senior Note
Maturities, Redemptions, and Repurchases
 
Revenue
Bond
Issuances and
Reofferings
of Purchased
Bonds
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities(a)
 (in millions)
Southern Company parent$
 $2,400
 $
 $
 $1,725
 $
Alabama Power600
 200
 
 
 
 1
Georgia Power750
 500
 584
 223
 1,218
 13
Mississippi Power
 25
 43
 
 
 
Southern Power
 600
 
 
 
 
Southern Company Gas
 300
 
 
 300
 50
Other
 
 
 25
 
 17
Elimination(b)

 
 
 
 
 (7)
Southern Company$1,350
 $4,025
 $627
 $248
 $3,243
 $74
(a)Includes reductions in finance lease obligations resulting from cash payments under finance leases.
(b)Represents reductions in affiliate finance lease obligations at Georgia Power, which are eliminated in Southern Company's consolidated financial statements.
Except as otherwise described herein, the Registrants used the proceeds of debt issuances for their redemptions and maturities shown in the table above, to repay short-term indebtedness, and for general corporate purposes, including working capital. The Subsidiary Registrants also used the proceeds for their construction programs.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Registrants plan to continue, when circumstances or events change.economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Southern Company
During 2019, Southern Company issued approximately 19.5 million shares of common stock through employee equity compensation plans and received proceeds of approximately $844 million.
In addition, in August 2019, Southern Company issued 34.5 million 2019 Series A Equity Units (Equity Units), initially in the form of corporate units (Corporate Units), at a stated amount of $50 per Corporate Unit, for a total stated amount of $1.725 billion. Net proceeds from the issuance were approximately $1.682 billion. Each Corporate Unit is comprised of (i) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019A Remarketable Junior Subordinated Notes due 2024, (ii) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019B Remarketable Junior Subordinated Notes due 2027, and (iii) a stock purchase contract, which obligates the holder to purchase from Southern Company, no later than August 1, 2022, a certain number of shares of Southern Company's common stock for $50 in cash. See Note 8 to the financial statements under "Equity Units" for additional information.
In January 2019, Southern Company repaid a $250 million short-term uncommitted bank credit arrangement and a $1.5 billion short-term floating rate bank loan.
In 2019, Southern Company, through repurchases and redemptions, retired all $1.0 billion aggregate principal amount of its 1.85% Senior Notes due July 1, 2019, $350 million aggregate principal amount of its Series 2014B 2.15% Senior Notes due September 1, 2019, $750 million aggregate principal amount of its Series 2018A Floating Rate Notes due February 14, 2020, and $300 million aggregate principal amount of its Series 2017A Floating Rate Senior Notes due September 30, 2020.
Subsequent to December 31, 2019, Southern Company issued $1.0 billion aggregate principal amount of Series 2020A 4.95% Junior Subordinated Notes due January 30, 2080.
Alabama Power
In February 2019, Alabama Power repaid at maturity $200 million aggregate principal amount of Series Z 5.125% Senior Notes due February 15, 2019.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In September 2019, Alabama Power issued $600 million aggregate principal amount of Series 2019A 3.45% Senior Notes due October 1, 2049.
Subsequent to December 31, 2019, Alabama Power received a capital contribution totaling $610 million from Southern Company.
Georgia Power
In March and December 2019, Georgia Power made borrowings under the multi-advance credit facilities related to the Amended and Restated Loan Guarantee Agreement in an aggregate principal amount of $835 million and $383 million, respectively, with applicable interest rates of 3.213% and 2.537%, respectively, both for an interest period that extends to the final maturity date of February 20, 2044. The proceeds were used to reimburse Georgia Power for Eligible Project Costs relating to the construction of Plant Vogtle Units 3 and 4. See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
In June 2019, Georgia Power entered into two short-term floating rate bank loans in aggregate principal amounts of $125 million each, both of which bear interest based on one-month LIBOR.
In September 2019, Georgia Power issued $400 million aggregate principal amount of Series 2019A 2.20% Senior Notes due September 15, 2024 and $350 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
Subsequent to December 31, 2019, Georgia Power issued $700 million aggregate principal amount of Series 2020A 2.10% Senior Notes due July 30, 2023, $500 million aggregate principal amount of Series 2020B 3.70% Senior Notes due January 30, 2050, and an additional $300 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
During 2019, Georgia Power reoffered to the public the following pollution control revenue bonds that previously had been purchased and were held by Georgia Power at December 31, 2018:
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009;
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013;
$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008;
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994; and
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013.
During 2019, Georgia Power purchased, held, and subsequently reoffered to the public an additional $115 million of pollution control revenue bonds.
In January 2019, Georgia Power redeemed approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In December 2019, Georgia Power repaid at maturity $500 million aggregate principal amount of its Series 2009B 4.25% Senior Notes.
Subsequent to December 31, 2019, Georgia Power received a capital contribution totaling $500 million from Southern Company and announced the redemption of all $500 million aggregate principal amount of its Series 2017C 2.00% Senior Notes due September 8, 2020.
Mississippi Power
In March 2019, Mississippi Power reoffered to the public approximately $43 million of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002, which previously had been purchased and held by Mississippi Power.
In December 2019, Mississippi Power redeemed $25 million aggregate principal amount of its Series 2018A Floating Rate Senior Notes due March 27, 2020.
Southern Power
In May 2019, Southern Power repaid at maturity a $100 million short-term floating rate bank loan.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In December 2019, Southern Power repaid at maturity $600 million aggregate principal amount of its Series 2016D 1.95% Senior Notes.
Also in December 2019, Southern Power entered into a short-term floating rate bank loan in the aggregate principal amount of $100 million, bearing interest based on one-month LIBOR. Subsequent to December 31, 2019, Southern Power repaid the bank loan.
Southern Company Gas
In July 2019, Nicor Gas repaid at maturity $50 million aggregate principal amount of its 4.7% first mortgage bonds.
In August 2019, Southern Company Gas Capital repaid at maturity $300 million aggregate principal amount of its 5.25% Senior Notes.
In August and October 2019, Nicor Gas issued $200 million and $100 million, respectively, aggregate principal amount of first mortgage bonds in a private placement.
Storm Damage Recovery
The Company defersBeginning January 1, 2020, Georgia Power is recovering $213 million annually through December 31, 2022, as provided in the 2019 ARP, for incremental operations and recovers certainmaintenance costs related to damagesof damage from major storms as mandated by the Georgia PSC. Beginning January 1, 2014, the Company is accruing $30 million annually under the 2013 ARP that is recoverable through base rates. As ofto its transmission and distribution facilities. At December 31, 2016 and December 31, 2015,2019, the balance in the regulatory asset related to storm damage was $206 million and $92 million, respectively, with approximately $30 million included in other regulatory assets, current for both years and approximately $176 million and $62 million included in other regulatory assets, deferred, respectively. The annual recovery amount is expected to be reviewed by the Georgia PSC and adjusted in future regulatory proceedings. As a result of this

NOTES (continued)
Georgia Power Company 2016 Annual Report

regulatory treatment, costs related to storms are generally not expected to have a material impact on the Company's earnings. See Note 3 under "Retail Regulatory Matters – Storm Damage Recovery" for additional information.
Environmental Remediation Recovery
The Company maintains a reserve for environmental remediation as mandated by the Georgia PSC. In December 2013, the Georgia PSC approved the 2013 ARP including the recovery of approximately $2 million annually through the environmental compliance cost recovery (ECCR) tariff. The Company recognizes a liability for environmental remediation costs only when it determines a loss is probable and reduces the reserve as expenditures are incurred. Any difference between the liabilities accrued and cost recovered through rates is deferred as a regulatory asset or liability. The annual recovery amount is expected to be reviewed by the Georgia PSC and adjusted in future regulatory proceedings. As a result of this regulatory treatment, environmental remediation liabilities generally are not expected to have a material impact on the Company's earnings. As of December 31, 2016, the balance of the environmental remediation liability was $17 million, with approximately $2 million included in other regulatory assets, current and approximately $33 million included as other regulatory assets, deferred. See Note 3 under "Environmental Matters – Environmental Remediation" for additional information.
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Materials and Supplies
Generally, materials and supplies include the average cost of transmission, distribution, and generating plant materials. Materials are charged to inventory when purchased and then expensed or capitalized to plant, as appropriate, at weighted average cost when installed.
Fuel Inventory
Fuel inventory includes the average cost of coal, natural gas, and oil, as well as transportation and emissions allowances. Fuel is recorded to inventory when purchased and then expensed, at weighted average cost, as used and recovered by the Company through fuel cost recovery rates approved by the Georgia PSC. Emissions allowances granted by the EPA are included in inventory at zero cost.
Financial Instruments
The Company uses derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, and electricity purchases and sales. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (included in "Other") and are measured at fair value. See Note 10 for additional information regarding fair value. Substantially all of the Company's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the Georgia PSC-approved fuel-hedging program result in the deferral of related gains and losses in OCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. Any ineffectiveness arising from cash flow hedges is recognized currently in net income. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the statements of income. Cash flows from derivatives are classified on the statements of cash flows in the same category as the hedged item. See Note 11 for additional information regarding derivatives.
Beginning in 2016, the Company offsets fair value amounts recognized for multiple derivative instruments executed with the same counterparty under netting arrangements. Additionally, the Company had no outstanding collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2016.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company has established controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income, changes in the fair value of qualifying cash flow hedges, and reclassifications for amounts included in net income.

NOTES (continued)
Georgia Power Company 2016 Annual Report

2. RETIREMENT BENEFITS
The Company has a defined benefit, trusteed, pension plan covering substantially all employees. This qualified pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). On December 19, 2016, the Company voluntarily contributed $287 million to the qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2017. The Company also provides certain defined benefit pension plans for a selected group of management and highly compensated employees. Benefits under these non-qualified pension plans are funded on a cash basis. In addition, the Company provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans. The Company funds its other postretirement trusts to the extent required by the Georgia PSC and the FERC. For the year ending December 31, 2017, no other postretirement trust contributions are expected.
Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the following year and the benefit obligations as of the measurement date are presented below.
Assumptions used to determine net periodic costs:2016 2015 2014
Pension plans     
Discount rate – benefit obligations4.65% 4.18% 5.02%
Discount rate – interest costs3.86
 4.18
 5.02
Discount rate – service costs5.03
 4.49
 5.02
Expected long-term return on plan assets8.20
 8.20
 8.20
Annual salary increase4.46
 3.59
 3.59
Other postretirement benefit plans     
Discount rate – benefit obligations4.49% 4.03% 4.85%
Discount rate – interest costs3.67
 4.03
 4.85
Discount rate – service costs4.88
 4.39
 4.85
Expected long-term return on plan assets6.27
 6.48
 6.75
Annual salary increase4.46
 3.59
 3.59
Assumptions used to determine benefit obligations:2016
2015
Pension plans


Discount rate4.40%
4.65%
Annual salary increase4.46

4.46
Other postretirement benefit plans


Discount rate4.23%
4.49%
Annual salary increase4.46

4.46
The Company estimates the expected rate of return on pension plan and other postretirement benefit plan assets using a financial model to project the expected return on each current investment portfolio. The analysis projects an expected rate of return on each of seven different asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a periodic rebalancing of each trust's portfolio.

NOTES (continued)
Georgia Power Company 2016 Annual Report

An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO as of December 31, 2016 were as follows:
 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.50% 4.50% 2025
Post-65 medical5.00
 4.50
 2025
Post-65 prescription10.00
 4.50
 2025
An annual increase or decrease in the assumed medical care cost trend rate of 1% would affect the APBO and the service and interest cost components at December 31, 2016 as follows:
 
1 Percent
Increase
 
1 Percent
Decrease
 (in millions)
Benefit obligation$55
 $48
Service and interest costs2
 2
Pension Plans
The total accumulated benefit obligation for the pension plans was $3.5 billion at December 31, 2016 and $3.3 billion at December 31, 2015. Changes in the projected benefit obligations and the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$3,615
 $3,781
Service cost70
 73
Interest cost136
 154
Benefits paid(164) (188)
Actuarial (gain) loss143
 (205)
Balance at end of year3,800
 3,615
Change in plan assets   
Fair value of plan assets at beginning of year3,196
 3,383
Actual return (loss) on plan assets288
 (13)
Employer contributions301
 14
Benefits paid(164) (188)
Fair value of plan assets at end of year3,621
 3,196
Accrued liability$(179) $(419)
At December 31, 2016, the projected benefit obligations for the qualified and non-qualified pension plans were $3.6 billion and $152 million, respectively. All pension plan assets are related to the qualified pension plan.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's pension plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$1,129
 $1,076
Other current liabilities(14) (13)
Employee benefit obligations(165) (406)
Presented below are the amounts included in regulatory assets at December 31, 2016 and 2015 related to the defined benefit pension plans that had not yet been recognized in net periodic pension cost along with the estimated amortization of such amounts for 2017.
 2016 2015 
Estimated
Amortization
in 2017
 (in millions)
Prior service cost$17
 $8
 $3
Net (gain) loss1,112
 1,068
 57
Regulatory assets$1,129
 $1,076
  
The changes in the balance of regulatory assets related to the defined benefit pension plans for the years ended December 31, 2016 and 2015 are presented in the following table:
 2016 2015
 (in millions)
Regulatory assets:   
Beginning balance$1,076
 $1,102
Net (gain) loss99
 59
Change in prior service costs14
 
Reclassification adjustments:   
Amortization of prior service costs(5) (9)
Amortization of net gain (loss)(55) (76)
Total reclassification adjustments(60) (85)
Total change53
 (26)
Ending balance$1,129
 $1,076
Components of net periodic pension cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$70
 $73
 $62
Interest cost136
 154
 153
Expected return on plan assets(258) (251) (228)
Recognized net (gain) loss55
 76
 41
Net amortization5
 9
 10
Net periodic pension cost$8
 $61
 $38
Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the Company has elected to amortize changes in the

NOTES (continued)
Georgia Power Company 2016 Annual Report

market value of all plan assets over five years rather than recognize the changes immediately. As a result, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.
Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2016, estimated benefit payments were as follows:
 
Benefit
Payments
 (in millions)
2017$184
2018190
2019196
2020202
2021206
2022 to 20261,126
Other Postretirement Benefits
Changes in the APBO and in the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$854
 $864
Service cost6
 7
Interest cost30
 34
Benefits paid(45) (45)
Actuarial (gain) loss(1) (22)
Plan amendment
 12
Retiree drug subsidy3
 4
Balance at end of year847
 854
Change in plan assets   
Fair value of plan assets at beginning of year358
 395
Actual return (loss) on plan assets21
 (6)
Employer contributions17
 10
Benefits paid(42) (41)
Fair value of plan assets at end of year354
 358
Accrued liability$(493) $(496)
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's other postretirement benefit plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$213
 $223
Employee benefit obligations(493) (496)

NOTES (continued)
Georgia Power Company 2016 Annual Report

Presented below are the amounts included in regulatory assets at December 31, 2016 and 2015 related to the other postretirement benefit plans that had not yet been recognized in net periodic other postretirement benefit cost along with the estimated amortization of such amounts for 2017.
 2016 2015 
Estimated
Amortization
in 2017
 (in millions)
Prior service cost$6
 $8
 $1
Net (gain) loss207
 215
 8
Regulatory assets$213
 $223
  
The changes in the balance of regulatory assets related to the other postretirement benefit plans for the plan years ended December 31, 2016 and 2015 are presented in the following table:
 2016 2015
 (in millions)
Regulatory assets:   
Beginning balance$223
 $213
Net (gain) loss
 9
Change in prior service costs
 12
Reclassification adjustments:   
Amortization of prior service costs(1) 
Amortization of net gain (loss)(9) (11)
Total reclassification adjustments(10) (11)
Total change(10) 10
Ending balance$213
 $223
Components of the other postretirement benefit plans' net periodic cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$6
 $7
 $6
Interest cost30
 34
 34
Expected return on plan assets(22) (24) (25)
Net amortization10
 11
 2
Net periodic postretirement benefit cost$24
 $28
 $17

NOTES (continued)
Georgia Power Company 2016 Annual Report

Future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. Estimated benefit payments are reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 
Benefit
Payments
 
Subsidy
Receipts
 Total
 (in millions)
2017$54
 $(4) $50
201856
 (5) 51
201958
 (5) 53
202059
 (5) 54
202160
 (6) 54
2022 to 2026303
 (32) 271
Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code of 1986, as amended. The Company's investment policies for both the pension plan and the other postretirement benefit plans cover a diversified mix of assets, including equity and fixed income securities, real estate, and private equity. Derivative instruments are used primarily to gain efficient exposure to the various asset classes and as hedging tools. The Company minimizes the risk of large losses primarily through diversification but also monitors and manages other aspects of risk.
The composition of the Company's pension plan and other postretirement benefit plan assets as of December 31, 2016 and 2015, along with the targeted mix of assets for each plan, is presented below:
 Target 2016 2015
Pension plan assets:     
Domestic equity26% 29% 30%
International equity25
 22
 23
Fixed income23
 29
 23
Special situations3
 2
 2
Real estate investments14
 13
 16
Private equity9
 5
 6
Total100% 100% 100%
Other postretirement benefit plan assets:     
Domestic equity36% 35% 34%
International equity24
 24
 27
Domestic fixed income33
 35
 25
Global fixed income

 

 8
Special situations1
 1
 
Real estate investments4
 4
 4
Private equity2
 1
 2
Total100% 100% 100%
The investment strategy for plan assets related to the Company's qualified pension plan is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significant portion of the liability of the pension plan is long-term in nature, the assets are invested consistent with long-term investment expectations for return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Company employs a formal

NOTES (continued)
Georgia Power Company 2016 Annual Report

rebalancing program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices.
Investment Strategies
Detailed below is a description of the investment strategies for each major asset category for the pension and other postretirement benefit plans disclosed above:
Domestic equity. A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.
International equity. A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Fixed income. A mix of domestic and international bonds.
Trust-owned life insurance (TOLI). Investments of the Company's taxable trusts aimed at minimizing the impact of taxes on the portfolio.
Special situations. Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies as well as investments in promising new strategies of a longer-term nature.
Real estate investments. Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.
Private equity. Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Benefit Plan Asset Fair Values
Following are the fair value measurements for the pension plan and the other postretirement benefit plan assets as of December 31, 2016 and 2015. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, management relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
Valuation methods of the primary fair value measurements disclosed in the following tables are as follows:
Domestic and international equity.Investments in equity securities such as common stocks, American depositary receipts, and real estate investment trusts that trade on a public exchange are classified as Level 1 investments and are valued at the closing price in the active market. Equity investments with unpublished prices (i.e. pooled funds) are valued as Level 2, when the underlying holdings used to value the investment are comprised of Level 1 or Level 2 equity securities.
Fixed income.Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
TOLI. Investments in TOLI policies are classified as Level 2 investments and are valued based on the underlying investments held in the policy's separate account. The underlying assets are equity and fixed income pooled funds that are comprised of Level 1 and Level 2 securities.
Real estate investments, private equity, and special situations investments.Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.

NOTES (continued)
Georgia Power Company 2016 Annual Report

The fair values of pension plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2015, investments in special situations were presented in the table below based on the nature of the investment.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$686
 $317
 $
 $
 $1,003
International equity(*)
420
 380
 
 
 800
Fixed income:         
U.S. Treasury, government, and agency bonds
 201
 
 
 201
Mortgage- and asset-backed securities
 4
 
 
 4
Corporate bonds
 338
 
 
 338
Pooled funds���
 179
 
 
 179
Cash equivalents and other340
 1
 
 
 341
Real estate investments106
 
 
 394
 500
Special situations
 
 
 61
 61
Private equity
 
 
 188
 188
Total$1,552
 $1,420
 $
 $643
 $3,615
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$565
 $236
 $
 $
 $801
International equity(*)
412
 343
 
 
 755
Fixed income:         
U.S. Treasury, government, and agency bonds
 157
 
 
 157
Mortgage- and asset-backed securities
 69
 
 
 69
Corporate bonds
 394
 
 
 394
Pooled funds
 173
 
 
 173
Cash equivalents and other
 50
 
 
 50
Real estate investments103
 
 
 421
 524
Private equity
 
 
 220
 220
Total$1,080
 $1,422
 $
 $641
 $3,143

NOTES (continued)
Georgia Power Company 2016 Annual Report

(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
The fair values of other postretirement benefit plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2015, investments in special situations were presented in the table below based on the nature of the investment.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$45
 $9
 $
 $
 $54
International equity(*)
11
 37
 
 
 48
Fixed income:         
U.S. Treasury, government, and agency bonds
 5
 
 
 5
Mortgage- and asset-backed securities
 
 
 
 
Corporate bonds
 9
 
 
 9
Pooled funds
 38
 
 
 38
Cash equivalents and other15
 
 
 
 15
Trust-owned life insurance
 162
 
 
 162
Real estate investments3
 
 
 11
 14
Special situations
 
 
 2
 2
Private equity
 
 
 5
 5
Total$74
 $260
 $
 $18
 $352
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.

NOTES (continued)
Georgia Power Company 2016 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$30
 $36
 $
 $
 $66
International equity(*)
12
 41
 
 
 53
Fixed income:         
U.S. Treasury, government, and agency  bonds
 5
 
 
 5
Mortgage- and asset-backed securities
 2
 
 
 2
Corporate bonds
 12
 
 
 12
Pooled funds
 30
 
 
 30
Cash equivalents and other10
 6
 
 
 16
Trust-owned life insurance
 158
 
 
 158
Real estate investments3
 
 
 12
 15
Private equity
 
 
 7
 7
Total$55
 $290
 $
 $19
 $364
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
Employee Savings Plan
The Company also sponsors a 401(k) defined contribution plan covering substantially all employees. The Company provides an 85% matching contribution on up to 6% of an employee's base salary. Total matching contributions made to the plan for 2016, 2015, and 2014 were $27 million, $26 million, and $25 million, respectively.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
In 2011, plaintiffs filed a putative class action against the Company in the Superior Court of Fulton County, Georgia alleging that the Company's collection in rates of municipal franchise fees (all of which are remitted to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. On November 16, 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court for further proceedings. The Company has filed a petition for writ of certiorari with the Georgia Supreme Court. The Company believes the plaintiffs' claims have no merit and intends to vigorously defend itself in this matter. The ultimate outcome of this matter cannot be determined at this time.
The Company is subject to certain claims and legal actions arising in the ordinary course of business. In addition, the Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Environmental Matters
Environmental Remediation
The Company must comply with environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Company may also incur substantial costs to clean up affected sites. See Note 1 under "Environmental Remediation Recovery" for additional information.
The Company's environmental remediation liability as of December 31, 2016 was $17$410 million. The Company has been designated or identified as a potentially responsible party at sites governed by the Georgia Hazardous Site Response Act and/or by the federal Comprehensive Environmental Response, Compensation, and Liability Act, and assessment and potential cleanup of such sites is expected.
The ultimate outcome of these matters cannot be determined at this time; however, as a result of the Company's regulatory treatment for environmental remediation expenses described in Note 1 under "Environmental Remediation Recovery," these matters are not expected to have a material impact on the Company's financial statements.
Nuclear Fuel Disposal Costs
Acting through the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. government entered into contracts with the Company that require the DOE to dispose of spent nuclear fuel and high level radioactive waste generated at Plant Hatch and Plant Vogtle Units 1 and 2 beginning no later than January 31, 1998. The DOE has yet to commence the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, the Company pursued and continues to pursue legal remedies against the U.S. government for its partial breach of contract.
In 2014, the Court of Federal Claims entered a judgment in favor of the Company in its spent nuclear fuel lawsuit seeking damages for the period from January 1, 2005 through December 31, 2010. In March 2015, the Company recovered approximately $18 million, based on its ownership interests, which was credited to accounts where the original costs were charged and reduced rate base, fuel, and cost of service for the benefit of customers.
In 2014, the Company filed additional lawsuits against the U.S. government for the costs of continuing to store spent nuclear fuel at Plant Hatch and Plant Vogtle Units 1 and 2 for the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extended to December 31, 2014. Damages will continue to accumulate until the issue is resolved or storage is provided. No amounts have been recognized in the financial statements as of December 31, 2016 for any potential recoveries from the additional lawsuits. The final outcome of these matters cannot be determined at this time; however, no material impact on the Company's net income is expected.
On-site dry spent fuel storage facilities are operational at Plant Vogtle Units 1 and 2 and Plant Hatch. Facilities can be expanded to accommodate spent fuel through the expected life of each plant.
FERC Matters
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company) and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a

NOTES (continued)
Georgia Power Company 2016 Annual Report

compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Retail Regulatory Matters
Rate Plans
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC on April 14, 2016, the 2013 ARP will continue in effect until December 31, 2019, and the Company will be required to file its next base rate case by July 1, 2019. Furthermore, through December 31, 2019, the Company and Atlanta Gas Light Company each will retain their respective merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings applicable to each will be shared on a 60/40 basis with their respective customers; thereafter, all merger savings will be retained by customers.
In accordance with the 2013 ARP, the Georgia PSC approved increases to tariffs effective January 1, 2015 and 2016 as follows: (1) traditional base tariff rates by approximately $107 million and $49 million, respectively; (2) ECCR tariff by approximately $23 million and $75 million, respectively; (3) Demand-Side Management tariffs by approximately $3 million in each year; and (4) Municipal Franchise Fee tariff by approximately $3 million and $13 million, respectively, for a total increase in base revenues of approximately $136 million and $140 million, respectively.
Under the 2013 ARP, the Company's retail ROE is set at 10.95% and earnings are evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% will be directly refunded to customers, with the remaining one-third retained by the Company. There will be no recovery of any earnings shortfall below 10.00% on an actual basis. In 2014, the Company's retail ROE exceeded 12.00%, and the Company refunded to retail customers approximately $11 million in 2016, as approved by the Georgia PSC on February 18, 2016. In 2015, the Company's retail ROE was within the allowed retail ROE range. In 2016, the Company's retail ROE exceeded 12.00%, and the Company expects to refund to retail customers approximately $40 million, subject to review and approval by the Georgia PSC. The ultimate outcome of this matter cannot be determined at this time.
Integrated Resource Plan
On July 28, 2016, the Georgia PSC approved the 2016 IRP including the decertification and retirement of Plant Mitchell Units 3, 4A, and 4B (217 MWs) and Plant Kraft Unit 1 (17 MWs), as well as the decertification of the Intercession City unit (143 MWs total capacity). On August 2, 2016, the Plant Mitchell and Plant Kraft units were retired. On August 31, 2016, the Company sold its 33% ownership interest in the Intercession City unit to Duke Energy Florida, LLC.
Additionally, the Georgia PSC approved the Company's environmental compliance strategy and related expenditures proposed in the 2016 IRP, including measures taken to comply with existing government-imposed environmental mandates, subject to limits on expenditures for Plant McIntosh Unit 1 and Plant Hammond Units 1 through 4.
The Georgia PSC approved the reclassification of the remaining net book value of Plant Mitchell Unit 3 and costs associated with materials and supplies remaining at the unit retirement date to a regulatory asset. Recovery of the unit's net book value will continue through December 31, 2019, as provided in the 2013 ARP. The timing of the recovery of the remaining balance of the unit's net book value as of December 31, 2019 and costs associated with materials and supplies remaining at the unit retirement date was deferred for consideration in the Company's 2019 base rate case.
The Georgia PSC also approved the Renewable Energy Development Initiative to procure an additional 1,200 MWs of renewable resources primarily utilizing market-based prices established through a competitive bidding process with expected in-service dates between 2018 and 2021. Additionally, 200 MWs of self-build capacity for use by the Company was approved, as well as consideration for no more than 200 MWs of capacity as part of a renewable commercial and industrial program.
The Georgia PSC also approved recovery of costs up to $99 million through June 30, 2019 to preserve nuclear as an option at a future generation site in Stewart County, Georgia. The timing of cost recovery will be determined by the Georgia PSC in a future base rate case. The ultimate outcome of this matter cannot be determined at this time.
Fuel Cost Recovery
The Company has established fuel cost recovery rates approved by the Georgia PSC. In December 2015, the Georgia PSC approved the Company's request to lower annual billings by approximately $350 million effective January 1, 2016. On May 17, 2016, the Georgia PSC approved the Company's request to further lower annual billings by approximately $313 million effective

NOTES (continued)
Georgia Power Company 2016 Annual Report

June 1, 2016. On December 6, 2016, the Georgia PSC approved the delay of the Company's next fuel case, which was previously scheduled to be filed by February 28, 2017. The Georgia PSC will review the Company's cumulative over or under recovered fuel balance no later than September 1, 2018 and evaluate the need to file a fuel case unless the Company deems it necessary to file a fuel case at an earlier time. Under an Interim Fuel Rider, the Company continues to be allowed to adjust its fuel cost recovery rates prior to the next fuel case if the under recovered fuel balance exceeds $200 million.
The Company's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon effective January 1, 2016.
The Company's over recovered fuel balance totaled approximately $84 million at December 31, 2016 and is included in over recovered regulatory clause revenues, current. At December 31, 2015, the Company's over recovered fuel balance totaled approximately $116 million, including $10 million in over recovered regulatory clause revenues, current and $106 million in other deferred credits and liabilities.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on the Company's revenues or net income, but will affect cash flow.
Storm Damage Recovery
As of December 31, 2016, the balance in the Company's regulatory asset related to storm damage was $206 million. During October 2016, Hurricane Matthew caused significant damage to the Company's transmission and distribution facilities. As of December 31, 2016, the Company had recorded incremental restoration cost related to this hurricane of $121 million, of which approximately $116 million was charged to the storm damage reserve and the remainder was capitalized. The Company is accruing $30 million annually through December 31, 2019, as provided in the 2013 ARP, to the storm damage reserve to cover the operations and maintenance costs of damages from major storms to its transmission and distribution facilities, which is recoverable through base rates. The rate of recovery of storm damage costs after December 31, 2019cost recovery is expected to be adjusted in the Company's 2019 base rate case.future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on theSouthern Company's or Georgia Power's financial statements. See Note 2 to the financial statements under "Georgia PowerStorm Damage Recovery" for additional information regarding Georgia Power's storm damage reserve.
Mississippi Power
Mississippi Power's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. Mississippi Power's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are expected to be recovered through Mississippi Power's base rates. See Note 2 to the financial statements under "Mississippi Power" for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2019 Base Rate Case
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed RMP, originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 currently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Storm Damage Recovery""Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. In recognition that Mississippi Power's long-term financial success is dependent upon how well it satisfies its customers' needs, PEP includes performance indicators that directly tie customer service indicators to Mississippi Power's allowed ROE. PEP measures Mississippi Power's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). Typically, two PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018 (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020.
Energy Efficiency
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 to the financial statements for additional information on AROs and Note 3 to the financial statements under "Other Matters – Mississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 to the financial statements for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 to the financial statements for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 to the financial statements for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and Mississippi Power's financial statements.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in the MRA Settlement Agreement, resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.
Cooperative Energy Power Supply Agreement
Effective April 1, 2018, Mississippi Power and Cooperative Energy amended and extended a previous power supply agreement through March 31, 2021, which was subsequently extended through May 31, 2021. The amendment increased the total capacity from 86 MWs to 286 MWs.
Cooperative Energy also has a 10-year network integration transmission service agreement (NITSA) with SCS for transmission service to certain delivery points on Mississippi Power's transmission system through March 31, 2021. As a result of the PSA amendment, Cooperative Energy and SCS also amended the terms of the NITSA, which the FERC approved, to provide for the purchase of incremental transmission capacity from April 1, 2018 through March 31, 2021.
Southern Company Gas
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently-incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable ROE. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.
The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent. See "GRAM" and "PRP" herein for additional information.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. Southern Company Gas has various mechanisms, such as weather and revenue normalization mechanisms and weather derivative instruments, that limit exposure to weather changes within typical ranges in these utilities' respective service territories.
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company Gas' revenues or net income, but will affect cash flows. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional natural gas cost recovery mechanism. However, Atlanta Gas Light does maintain natural gas inventory for the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recover a significant portion of the fixed customer service and pipeline infrastructure costs based on assumed natural gas volumes used by customers. The utilities, including Nicor Gas beginning in November 2019, have decoupled regulatory mechanisms that Southern Company Gas believes encourage conservation by separating the recoverable amount of these fixed costs from the amounts of natural gas used by customers. See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information. Also see "Construction ProgramsSouthern Company GasInfrastructure Replacement Programs and Capital Projects" for additional information regarding infrastructure replacement programs at certain of the natural gas distribution utilities.
The following table provides regulatory information for Southern Company Gas' natural gas distribution utilities:
 Nicor Gas Atlanta Gas Light Virginia Natural Gas Chattanooga Gas
Authorized ROE(a)
9.73% 10.25% 9.50% 9.80%
Authorized ROE range(a)
N/A 10.05% - 10.45% 9.00% - 10.00% N/A
Weather normalization mechanisms(b)

   ü ü
Decoupled, including straight-fixed-variable rates(c)
ü ü ü 
Regulatory infrastructure program rates(d)
ü 
 ü  
Bad debt rider(e)
ü   ü ü
Energy efficiency plan(f)
ü   ü 
Annual base rate adjustment mechanism(g)
  ü   ü
Year of last rate decision2019 2019 2018 2018
(a)Atlanta Gas Light's authorized ROE and ROE range became effective on January 1, 2020. Atlanta Gas Light's ROE for 2019 was 10.75%.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Allows for recovery of fixed customer service costs separately from assumed natural gas volumes used by customers. On October 2, 2019, Nicor Gas received approval for a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Nicor Gas, Virginia Natural Gas, and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)Recovery of costs associated with plans to achieve specified energy savings goals.
(g)Regulatory mechanism allowing annual adjustments to base rates up or down based on authorized ROE and/or ROE range.
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program (i-VPR) to replace aging plastic pipe and the Integrated System Reinforcement Program (i-SRP) to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts" herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. See "Rate Proceedings" and "Unrecognized Ratemaking Amounts" herein for additional information.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.
See Note 2 to the financial statements under "Southern Company GasRate Proceedings" for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Affiliate Asset Management Agreements
With the exception of Nicor Gas, the natural gas distribution utilities use asset management agreements with an affiliate, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the natural gas distribution utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the natural gas distribution utilities, but these natural gas distribution utilities maintain the right and ability to make their own long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the natural gas distribution utility through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee.
Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110
Construction Programs
The Registrants are engaged in continuous construction programs to accommodate existing and estimated future loads on their respective systems. The Southern Company system intends to continue its strategy of developing and constructing new electric generating facilities, expanding and improving the electric transmission and electric and natural gas distribution systems, and undertaking projects to comply with environmental laws and regulations.
For the traditional electric operating companies, major generation construction projects are subject to state PSC approval in order to be included in retail rates. The largest construction project currently underway in the Southern Company system is Plant Vogtle Units 3 and 4. See "Nuclear Construction" herein for additional information. Also see "Regulatory MattersAlabama Power" herein for information regarding Alabama Power's construction of Plant Barry Unit 8.
While Southern Power generally constructs and acquires generation assets covered by long-term PPAs, any uncontracted capacity could negatively affect future earnings. See "Southern Power" herein, "Acquisitions and DispositionsSouthern Power" herein, and Note 15 to the financial statements under "Southern Power" for additional information about costs relating to Southern Power's acquisitions that involve construction of renewable energy facilities.
Southern Company Gas is engaged in various infrastructure improvement programs designed to update or expand the natural gas distribution systems of the natural gas distribution utilities to improve reliability and meet operational flexibility and growth. The natural gas distribution utilities recover their investment and a return associated with these infrastructure programs through their regulated rates. See "Southern Company Gas" herein for additional information regarding infrastructure improvement programs at the natural gas distribution utilities and certain pipeline construction projects.
See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements" herein for additional information regarding the Company's storm damage reserve.Registrants' capital requirements for their construction programs, including estimated totals for each of the next five years.
Nuclear Construction
In 2008,2009, the Company, acting for itselfGeorgia PSC certified construction of Plant Vogtle Units 3 and as agent for Oglethorpe4. Georgia Power Corporation (OPC),holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the Municipal Electric AuthorityNRC issued the related combined construction and operating licenses, which allowed full construction of Georgia (MEAG Power), and the City of Dalton, Georgia (Dalton), acting by and through its Board of Water, Light, and Sinking Fund Commissioners, doing business as Dalton Utilities (collectively, Vogtle Owners), entered into an agreement with a consortium consisting of Westinghouse Electric Company LLC (Westinghouse) and Stone & Webster, Inc., which was subsequently acquired by Westinghouse and changed its name to WECTEC Global Project Services Inc. (WECTEC) (Westinghouse and WECTEC, collectively, Contractor), pursuant to which the Contractor agreed to design, engineer, procure, construct, and test two AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities atto begin. Until March 2017, construction on Plant Vogtle (VogtleUnits 3 and 4 Agreement).
Under the terms ofcontinued under the Vogtle 3 and 4 Agreement,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Owners agreed to payServices Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a purchase price subject to certain price escalationstime and adjustments, including fixed escalation amountsmaterials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and index-based adjustments, as well as adjustments for change orders, and performance bonuses for early completion and unit performance. Thetesting of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement also provides for liquidated damages upon the Contractor's failure to fulfill the schedule and performance guarantees, subject to an aggregate cap of 10% of the contract price, or approximately $920 million to $930 million. In addition, the Vogtle 3 and 4 Agreement provides for limited cost sharingis terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for Contractoritself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs under certain conditions (which the Company has not been notified have occurred) with maximum additional capital costs under this provision attributableplus a base fee and an at-risk fee, which is subject to the Company (basedadjustment based on the Company's ownership interest) of approximately $114 million.Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (and not(not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to the ContractorBechtel under the Vogtle 3 and 4Bechtel Agreement. The Company's proportionate share is 45.7%. InVogtle Owners may terminate the event of certain credit rating downgrades ofBechtel Agreement at any time for their convenience, provided that the Vogtle Owner, such Vogtle OwnerOwners will be required to provide a letter of credit or other credit enhancement.
Certain obligations of Westinghouse have been guaranteed by Toshiba Corporation (Toshiba), Westinghouse's parent company. Inpay amounts related to work performed prior to the event of certain credit rating downgrades of Toshiba, Westinghouse is required to provide letters of credit or other credit enhancement. In December 2015, Toshiba experienced credit rating downgrades and Westinghouse providedtermination (including the Vogtle Owners with $920 million of letters of credit. These letters of credit remain in place in accordance with the termsapplicable portion of the Vogtle 3base fee), certain termination-related costs, and, 4 Agreement.

NOTES (continued)
Georgia Power Company 2016 Annual Report

On February 14, 2017, Toshiba announced preliminary earnings results for the period ended December 31, 2016, which included a substantial goodwill impairment charge at Westinghouse attributed to increased cost estimates to complete its U.S. nuclear projects, including Plant Vogtle Units 3 and 4. Toshiba also warned that it will likely be in a negative equity position as a resultcertain stages of the charges. Atwork, the same time, Toshiba reaffirmed its commitment to its U.S. nuclear projects with implementation of management changes and increased oversight. An inability or failure by the Contractor to perform its obligations under the Vogtle 3 and 4 Agreement could have a material impact on the construction of Plant Vogtle Units 3 and 4.
Under the termsapplicable portion of the Vogtle 3 and 4 Agreement, the Contractor does not have a right to terminate the Vogtle 3 and 4 Agreement for convenience. The Contractorat-risk fee. Bechtel may terminate the Vogtle 3 and 4Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspension or delayssuspensions of work, action by a governmental authority to permanently stop work, certain breaches of the Vogtle 3 and 4Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events. In
See Note 8 to the eventfinancial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of an abandonment of work by the Contractor, the maximum liabilitydefault, mandatory prepayment events, and conditions to borrowing.
Cost and Schedule
Georgia Power's approximate proportionate share of the Contractor under theremaining estimated capital cost to complete Plant Vogtle Units 3 and 4 Agreementby the expected in-service dates of November 2021 and November 2022, respectively, is increased significantly, but remains subjectas follows:
 (in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to limitations. The Vogtle Ownersthe base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may terminate the Vogtle 3 and 4 Agreement at any time for convenience, provided that the Vogtle Owners will be required to pay certain termination costs.
In 2009,request the Georgia PSC voted to certifyevaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 withwill total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a certified capital costregular basis to incorporate current information available, particularly in the areas of $4.418 billion. commodity installation, system turnovers, and workforce statistics.
In addition, in 2009 the Georgia PSC approved inclusionApril 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of the Plant Vogtle Units 3a strategy to maintain and, 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows the Company to recover financing costs for nuclear construction projects certified by the Georgia PSC. Financing costs are recovered on all applicable certified costs through annual adjustmentswhere possible, build margin to the NCCR tariff by including the related CWIP accounts in rate base during the construction period. The Georgia PSC approved an NCCR tariff of $368 million for 2014, as well as increases to the NCCR tariff of approximately $27 million and $19 million effective January 1, 2015 and 2016, respectively.
The Company is required to file semi-annual Vogtle Construction Monitoring (VCM) reports with the Georgia PSC by February 28 and August 31 each year. In accordance with the 2009 certification order, the Company requested amendments to the Plant Vogtle Units 3 and 4 certificate in both the February 2013 (eighth VCM) and February 2015 (twelfth VCM) filings, when projected construction capital costs to be borne by the Company increased by 5% above the certified costs and estimatedregulatory-approved in-service dates were extended. In October 2013, the Georgia PSC approved a stipulation (2013 Stipulation) between the Company and the Georgia PSC Staff to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate until the completion of Plant Vogtle Unit 3 or earlier if deemed appropriate by the Georgia PSC and the Company. In April 2015, the Georgia PSC recognized that the certified cost and the 2013 Stipulation did not constitute a cost recovery cap and deemed the amendment requested in the February 2015 filing unnecessary and withdrawn until the completion of construction of Plant Vogtle Unit 3 consistent with the 2013 Stipulation.
On December 31, 2015, Westinghouse and the Vogtle Owners entered into a definitive settlement agreement (Contractor Settlement Agreement) to resolve disputes between the Vogtle Owners and the Contractor under the Vogtle 3 and 4 Agreement, including litigation that was pending in the U.S. District Court for the Southern District of Georgia (Vogtle Construction Litigation). Effective December 31, 2015, the Company, acting for itself and as agent for the other Vogtle Owners, and the Contractor entered into an amendment to the Vogtle 3 and 4 Agreement to implement the Contractor Settlement Agreement. The Contractor Settlement Agreement and the related amendment to the Vogtle 3 and 4 Agreement (i) restrict the Contractor's ability to seek further increases in the contract price by clarifying and limiting the circumstances that constitute nuclear regulatory changes in law; (ii) provide for enhanced dispute resolution procedures; (iii) revise the guaranteed substantial completion dates to June 30, 2019November 2021 for Unit 3 and June 30, 2020November 2022 for Unit 4; (iv) provide4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Nuclear and Georgia Power believe that delay liquidated damages will commence ifexisting productivity levels and pace of activity completion are sufficient to meet the nuclear fuel loading date for each unit doesregulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not occur by December 31, 2018change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and December 31, 2019November 2022 for Unit 4;4. This update included initiatives to improve productivity while refining and (v) provideextending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the Company,units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on its ownership interest, will pay tonew technology that only within the Contractor and capitalize tolast few years began initial operation in the project cost approximately $350 million,global nuclear industry at this scale), or regional transmission upgrades, any of which approximately $263 million had been paid as of December 31, 2016. In addition,may require additional labor and/or materials; or other issues could arise and change the Contractor Settlement Agreement provides for the resolution of other open existing items relating to the scope of the project under the Vogtle 3projected schedule and 4 Agreement, including cyber security,for which costs are reflected in the Company's current in-service forecast of $5.440 billion. Further, as part of the settlement and Westinghouse's acquisition of WECTEC: (i) Westinghouse engaged Fluor Enterprises, Inc., a subsidiary of Fluor Corporation, as a new construction subcontractor and (ii) the Vogtle Owners, Chicago Bridge & Iron Co, N.V., and The Shaw Group Inc. entered into mutual releases of any and all claims arising out of events or circumstances in connection with the construction of Plant Vogtle Units 3 and 4 that occurred on or before the date of the Contractor Settlement Agreement. On January 5, 2016, the Vogtle Construction Litigation was dismissed with prejudice.estimated cost.
On December 20, 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving the following prudence matters: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report will be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement is reasonable and prudent and none of the amounts paid or to be paid pursuant to the Contractor Settlement Agreement should be

NOTES (continued)
Georgia Power Company 2016 Annual Report

disallowed from rate base on the basis of imprudence; (iii) financing costs on verified and approved capital costs will be deemed prudent provided they are incurred prior to December 31, 2019 and December 31, 2020 for Plant Vogtle Units 3 and 4, respectively; and (iv) (a) the in-service capital cost forecast will be adjusted to $5.680 billion (Revised Forecast), which includes a contingency of $240 million above the Company's current forecast of $5.440 billion, (b) capital costs incurred up to the Revised Forecast will be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, and (c) the Company would have the burden to show that any capital costs above the Revised Forecast are reasonable and prudent. Under the terms of the Vogtle Cost Settlement Agreement, the certified in-service capital cost for purposes of calculating the NCCR tariff will remain at $4.418 billion. Construction capital costs above $4.418 billion will accrue AFUDC through the date each unit is placed in service. The ROE used to calculate the NCCR tariff was reduced from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016. For purposes of the AFUDC calculation, the ROE on costs between $4.418 billion and $5.440 billion will also be 10.00% and the ROE on any amounts above $5.440 billion would be the Company's average cost of long-term debt. If the Georgia PSC adjusts the Company's ROE rate setting point in a rate case prior to Plant Vogtle Units 3 and 4 being placed into retail rate base, then the ROE for purposes of calculating both the NCCR tariff and AFUDC will likewise be 95 basis points lower than the revised ROE rate setting point. If Plant Vogtle Units 3 and 4 are not placed in service by December 31, 2020, then (i) the ROE for purposes of calculating the NCCR tariff will be reduced an additional 300 basis points, or $8 million per month, and may, at the Georgia PSC's discretion, be accrued to be used for the benefit of customers, until such time as the units are placed in service and (ii) the ROE used to calculate AFUDC will be the Company's average cost of long-term debt.
Under the terms of the Vogtle Cost Settlement Agreement, Plant Vogtle Units 3 and 4 will be placed into retail rate base on December 31, 2020 or when placed in service, whichever is later. The Georgia PSC will determine for retail ratemaking purposes the process of transitioning Plant Vogtle Units 3 and 4 from a construction project to an operating plant no later than the Company's base rate case required to be filed by July 1, 2019.
The Georgia PSC has approved fifteen VCM reports covering the periods through June 30, 2016, including construction capital costs incurred, which through that date totaled $3.7 billion. The Company expects to file the sixteenth VCM report, covering the period from July 1 through December 31, 2016, requesting approval of $222 million of construction capital costs incurred during that period, with the Georgia PSC by February 28, 2017. The Company's CWIP balance for Plant Vogtle Units 3 and 4 was approximately $3.9 billion as of December 31, 2016, and the Company had incurred $1.3 billion in financing costs through December 31, 2016.
As of December 31, 2016, the Company had borrowed $2.6 billion related to Plant Vogtle Units 3 and 4 costs through a loan guarantee agreement between the Company and the DOE and a multi-advance credit facility among the Company, the DOE, and the FFB. See Note 6 under "DOE Loan Guarantee Borrowings" for additional information, including applicable covenants, events of default, and mandatory prepayment events.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise as construction proceeds.arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely resolutionsubmittal by Southern Nuclear of Inspections, Tests, Analyses, and Acceptance Criteriathe ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, as construction proceeds, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs eitherof approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners or the Contractor orentered into an amendment to both.
In addition to Toshiba's reaffirmation of its commitment, the Contractor provided the Company with revised forecasted in-service dates of December 2019 and September 2020their joint ownership agreements for Plant Vogtle Units 3 and 4 respectively. The Company is currently reviewing a preliminary summary schedule supporting these datesto provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that ultimately must be reconciled to a detailed integrated project schedule. As construction continues,require the risk remains that challenges with Contractor performance including labor productivity, fabrication, delivery, assembly, and installationvote of plant systems, structures, and components, or other issues could arise and may further impact project schedule and cost. The Company expects the Contractor to employ mitigation efforts and believesholders of at least 90% of the Contractor is responsible for any related costs under theownership interests in Plant Vogtle Units 3 and 4 Agreement.to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company estimates itsand Subsidiary Companies 2019 Annual Report

Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 44. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be approximately $30recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million per month, with total construction period financing costs of approximately $2.5 billion. Additionally, the Company estimates its owner's costs to be approximately $6 million per month, net of delay liquidated damages.

NOTES (continued)annually, effective January 1, 2020.
Georgia Power Companyis required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, Annual Report

The revised forecasted in-service dates are within the timeframe contemplatedGeorgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and would enable both units to qualify for production tax credits the IRS has allocated to eachrelated customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 which require the applicable unit toshould be placed in service before 2021. The net present value of the production tax credits is estimated at approximately $400 million per unit.
Future claims by the Contractor or the Company (on behalf of thecompleted, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Owners) could arise throughout construction. These claims may be resolved through formal and informal dispute resolution procedures under the VogtleUnits 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million,

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

$100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and underapproximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the enhanced dispute resolution procedures, may be resolvedGeorgia PSC covering the period from July 1, 2019 through litigation after the completionDecember 31, 2019, requesting approval of nuclear fuel load for both units.$674 million of construction capital costs incurred during that period.
The ultimate outcome of these matters cannot be determined at this time.
4. JOINT OWNERSHIP AGREEMENTSSouthern Power
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 2019Northern States Power Company20 years
Wildhorse Mountain (b)
Wind100Pushmataha County, OKDecember 2019Arkansas Electric Cooperative Corporation20 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 2020Royal Caribbean Cruises LTD12 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 2020Puget Sound Energy20 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Acquisitions and DispositionsSouthern PowerSales of Natural Gas and Biomass Plants" herein and Note 15 to the financial statements under "Southern Power" and "Assets Held for Sale" for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Alabama Power own equally allSubsidiary Companies 2019 Annual Report

(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Total aggregate construction costs for the two projects under construction at December 31, 2019, excluding acquisition costs, are expected to be between $490 million and $535 million. At December 31, 2019, total costs of construction incurred for these projects were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Southern Company Gas
Infrastructure Replacement Programs and Capital Projects
Southern Company Gas continues to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help ensure the safety and reliability of the outstandingutility infrastructure. In addition to capital stockexpenditures recovered through base rates by each of SEGCO, which owns electric generating unitsthe natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Total capital expenditures incurred during 2019 for gas distribution operations were $1.4 billion.
The following table and discussions provide updates on the infrastructure replacement programs and capital projects at the natural gas distribution utilities at December 31, 2019. These programs are risk-based and designed to update and replace cast iron, bare steel, and mid-vintage plastic materials or expand Southern Company Gas' distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2020 are quantified in the discussion below.
Utility Program Recovery Expenditures in 2019 Expenditures Since Project Inception Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
      (in millions) (miles) (miles) (years)  
Nicor Gas Investing in Illinois(*) Rider $396
 $1,712
 843
 1,450
 9
 2023
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) Rider 45
 244
 363
 770
 13
 2024
Total     $441
 $1,956
 1,206
 2,220
    
(*)Includes replacement of pipes, compressors, and transmission mains along with other improvements such as new meters. Scope of program miles is an estimate and subject to change.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. Nicor Gas expects to place into service $400 million of qualifying projects under Investing in Illinois in 2020.
In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Regulatory MattersSouthern Company GasRate Proceedings" herein for additional information.
Virginia Natural Gas
In 2012, the Virginia Commission approved the SAVE program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total rated capacitypotential

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Alabama PowerSubsidiary Companies 2019 Annual Report

variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million. Virginia Natural Gas expects to invest $50 million under this program in 2020.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a power contract.separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
As discussed under "Regulatory Matters – Southern Company Gas – Utility Regulation and Alabama Power make payments sufficientRate Design" herein, i-SRP and i-VPR will continue under GRAM and the recovery of and return on current and future infrastructure program capital investments will be included in base rates.
Pipeline Construction Projects
Southern Company Gas is involved in two significant pipeline construction projects within its gas pipeline investments segment. These projects, along with Southern Company Gas' existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for the operating expenses, taxes, interest expense,new capacity, enhance system reliability, and a ROE. The Company's share of purchased power totaled $57 million in 2016, $78 million in 2015, and $84 million in 2014 and is included in purchased power, affiliatesgenerate economic development in the statements of income. Theareas served.
In 2014, Southern Company accounts for SEGCO using the equity method. See Note 7 under "Guarantees" for additional information.
The Company owns undivided interests in Plants Vogtle, Hatch, Wansley, and Scherer in varying amounts jointly with one or more of the following entities: OPC, MEAG Power, Dalton, Florida Power & Light Company, Jacksonville Electric Authority, and Gulf Power. Under these agreements, the Company has been contracted to operate and maintain the plants as agent for the co-owners and is jointly and severally liable for third party claims related to these plants. In addition, the Company jointly owns the Rocky Mountain pumped storage hydroelectric plant with OPC, which is the operator of the plant. On August 31, 2016, the Company sold its 33%Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Intercession City combustion turbine unitAtlantic Coast Pipeline, an interstate pipeline company formed to Duke Energy Florida, LLC.develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. The proposed pipeline project is expected to transport natural gas to customers in Virginia. In 2017, the Atlantic Coast Pipeline received FERC approval.
At The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 to the financial statements under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York. Southern Company Gas believes this pipeline will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 31, 2016, the Company's percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation30, 2019, PennEast Pipeline filed a two-year extension request with the above entities were as follows:FERC to complete the project by January 19, 2022.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
Facility (Type)Company Ownership Plant in Service Accumulated Depreciation CWIP
   (in millions)
Plant Vogtle (nuclear)       
Units 1 and 245.7% $3,545
 $2,111
 $74
Plant Hatch (nuclear)50.1
 1,297
 585
 81
Plant Wansley (coal)53.5
 1,046
 308
 12
Plant Scherer (coal)       
Units 1 and 28.4
 258
 90
 3
Unit 375.0
 1,203
 458
 23
Rocky Mountain (pumped storage)25.4
 181
 129
 

Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in two phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's proportionate share ofand Southern Company Gas' financial statements. Southern Company Gas evaluated its plant operating expenses is included in the corresponding operating expenses in the statements of incomeinvestments and the Company is responsible for providing its own financing.
The Company also owns 45.7% of Plant Vogtle Units 3 and 4, which are currently under construction and had a CWIP balance of approximately $3.9 billiondetermined there was no impairment as of December 31, 2016. 2019.
See NoteNotes 3 and 7 to the financial statements under "Retail Regulatory Matters"Guarantees" and "Southern Company GasNuclear Construction"Equity Method Investments," respectively, for additional information.information on these pipeline projects.
5. INCOME TAXESSouthern Power's Power Sales Agreements
General
Southern Power has PPAs with some of the traditional electric operating companies, other investor-owned utilities, IPPs, municipalities, and other load-serving entities, as well as commercial and industrial customers. The PPAs are expected to provide Southern Power with a stable source of revenue during their respective terms.
Many of Southern Power's PPAs have provisions that require Southern Power or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio.
On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the U.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns four solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from PG&E of $2 million related to the PPAs and $33 million related to the transmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with a November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and has concluded that these solar facilities are not impaired. PG&E has continued to perform under the terms of the PPAs. Southern Power does not expect a material impact to its financial statements if, as a result of the bankruptcy proceedings, PG&E does not perform in accordance with the PPAs or the terms of the PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Southern Power is working to maintain and expand its share of the wholesale markets. During 2019, Southern Power saw an increase in the demand for energy and capacity that can be served from natural gas generating facilities, especially in the Southeast, and expects that this increase in demand will continue in the near term (2020-2022), with timing varying depending on the market. During 2019, Southern Power successfully remarketed approximately 190 to 650 MWs of annual natural gas generation capacity to load-serving entities through several PPAs extending over the next nine years. Southern Power calculates an investment coverage ratio for its generating assets, including those owned with various partners, based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction) as the investment amount. With the inclusion of investments associated with the wind facilities currently under construction, as well as other capacity and energy contracts, and excluding Plant Mankato, which was sold on January 17, 2020, Southern Power's average investment coverage ratio at December 31, 2019 was 93% through 2024 and 90% through 2029, with an average remaining contract duration of approximately 14 years. See "Acquisitions and DispositionsSouthern Power" and "Construction ProgramsSouthern Power" herein for additional information.
Natural Gas
Southern Power's electricity sales from natural gas facilities are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. Southern Power typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that Southern Power serve the customer's capacity and energy requirements from a combination of the customer's own generating units and

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

from Southern Power resources not dedicated to serve unit or block sales. Southern Power has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing Southern Power for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, Southern Power may be responsible for excess fuel costs. With respect to fuel transportation risk, most of Southern Power's PPAs provide that the counterparties are responsible for the availability of fuel transportation to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce Southern Power's exposure to certain operation and maintenance costs, Southern Power has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
Southern Power's electricity sales from solar and wind (renewable) generating facilities are also primarily through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide Southern Power a certain fixed price for the electricity sold to the grid. As a result, Southern Power's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, transmission constraints, and other factors. Generally, under the renewable generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Income Tax Matters
Consolidated Income Taxes
On behalf of the Company,Registrants, Southern Company files a consolidated federal income tax return and various combined and separate state income tax returns.returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Current and Deferred Income Taxes
Details of incomecertain tax provisions are as follows:
 2016 2015 2014
 (in millions)
Federal –     
Current$391
 $515
 $295
Deferred319
 176
 366
 710
 691
 661
State –     
Current6
 81
 82
Deferred64
 (3) (14)
 70
 78
 68
Total$780
 $769
 $729
The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 2016 2015
 (in millions)
Deferred tax liabilities –   
Accelerated depreciation$5,266
 $4,909
Property basis differences957
 1,003
Employee benefit obligations428
 310
Premium on reacquired debt56
 61
Regulatory assets –   
Storm damage reserves83
 37
Employee benefit obligations546
 528
Asset retirement obligations726
 545
Retired assets55
 58
Asset retirement obligations182
 161
Other83
 92
Total8,382
 7,704
Deferred tax assets –   
Federal effect of state deferred taxes173
 150
Employee benefit obligations661
 642
Other property basis differences105
 88
Other deferred costs100
 83
State investment tax credit carryforward201
 216
Federal tax credit carryforward84
 3
Unbilled fuel revenue47
 47
Regulatory liabilities associated with asset retirement obligations33
 60
Asset retirement obligations908
 706
Other70
 82
Total2,382
 2,077
Accumulated deferred income taxes$6,000
 $5,627

NOTES (continued)
Georgia Power Company 2016 Annual Report

The application of bonus depreciation provisions in current tax law significantly increased deferred tax liabilities related to accelerated depreciation in 2016 and 2015.
At December 31, 2016, tax-related regulatory assets to be recovered from customers were $681 million. These assets are primarily attributable to tax benefits flowed through to customers in prior years and deferred taxes previously recognizedevents at rates lower than the current enacted tax law.
At December 31, 2016, tax-related regulatory liabilities to be credited to customers were $121 million. These liabilities are primarily attributable to deferred taxes previously recognized at rates higher than the current enacted tax law.
In accordance with regulatory requirements, utilized federal ITCs are deferred and amortized over the average life of the related property with such amortization normally applied as a credit to reduce depreciation in the statements of income. Credits amortized in this manner amounted to $10 million in each of 2016, 2015, and 2014. State investment tax credits are recognized in the period in which the credits are generated and totaled $42 million in 2016, $33 million in 2015, and $34 million in 2014. At December 31, 2016, the Company had $83 million in federal ITC carryforwards that will expire by 2036 and $201 million in state ITC carryforwards that will expire between 2019 and 2027.
Effective Tax Rate
A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 2016 2015 2014
Federal statutory rate35.0 % 35.0 % 35.0 %
State income tax, net of federal deduction2.1
 2.5
 2.2
Non-deductible book depreciation0.8
 1.2
 1.3
AFUDC equity(0.8) (0.7) (0.8)
Other(0.4) (0.4) (0.7)
Effective income tax rate36.7 % 37.6 % 37.0 %
On March 30, 2016, the FASB issued ASU 2016-09, which changes the accounting for income taxes for share-based payment award transactions. Entities are required to recognize all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation as income tax expense or benefit in the income statement. The adoption of ASU 2016-09 did not have a material impact on the Company's overall effective tax rate. See Note 1 under "Recently Issued Accounting Standards" for additional information.
Unrecognized Tax Benefits
The Company had no unrecognized tax benefits as of December 31, 2016 and no material changes in unrecognized tax benefits for any year presented.
The Company classifies interest on tax uncertainties as interest expense; however, the Company did not have any accrued interest or penalties for unrecognized tax benefits for any year presented.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. The settlement of federal and state audits could impact the balances significantly. At this time, an estimate of the range of reasonably possible outcomes cannot be determined.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2012. Southern Company has filedand/or its 2013 through 2015 federal income tax returnsother subsidiaries can, and has received partial acceptance letters from the IRS; however, the IRS has not finalized its audits. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for the Company's state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2011.

NOTES (continued)
Georgia Power Company 2016 Annual Report

6. FINANCING
Securities Due Within One Year
A summary of scheduled maturities of long-term debt due within one year at December 31 was as follows:
 2016 2015
 (in millions)
Senior notes$450
 $700
Pollution control revenue bonds
 4
Capital leases10
 8
Total$460
 $712
Maturities through 2021 applicable to total long-term debt are as follows: $460 million in 2017; $762 million in 2018; $513 million in 2019; $57 million in 2020; and $376 million in 2021.
Senior Notes
In March 2016, the Company issued $325 million aggregate principal amount of Series 2016A 3.25% Senior Notes due April 1, 2026 and $325 million aggregate principal amount of Series 2016B 2.40% Senior Notes due April 1, 2021. An amount equal to the proceeds from the Series 2016A 3.25% Senior Notes due April 1, 2026 is being allocated to eligible green expenditures, including financing of or investments in solar generating facilities or electric vehicle charging infrastructure, or payments under PPAs served by solar or wind generating facilities. The proceeds from the Series 2016B 2.40% Senior Notes due April 1, 2021 were used to repay at maturity $250 million aggregate principal amount of the Company's Series 2013B Floating Rate Senior Notes due March 15, 2016, to repay a portion of the Company's short-term indebtedness, and for general corporate purposes, including the Company's continuous construction program.
At December 31, 2016 and 2015, the Company had $6.2 billion and $6.3 billion of senior notes outstanding, respectively, which included senior notes due within one year. These senior notes are effectively subordinated to all secured debt of the Company, which aggregated $2.8 billion and $2.4 billion at December 31, 2016 and 2015, respectively. As of December 31, 2016, the Company's secured debt included borrowings of $2.6 billion guaranteed by the DOE and capital lease obligations of $169 million. As of December 31, 2015, the Company's secured debt included borrowings of $2.2 billion guaranteed by the DOE and capital lease obligations of $183 million. See Note 7 and "DOE Loan Guarantee Borrowings" herein for additional information.
Pollution Control Revenue Bonds
Pollution control revenue bond obligations represent loans to the Company from public authorities of funds derived from sales by such authorities of revenue bonds issued to finance pollution control and solid waste disposal facilities. The Company is required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. The amount of tax-exempt pollution control revenue bond obligations outstanding at both December 31, 2016 and 2015 was $1.8 billion.
DOE Loan Guarantee Borrowings
Pursuant to the loan guarantee program established under Title XVII of the Energy Policy Act of 2005 (Title XVII Loan Guarantee Program), the Company and the DOE entered into a loan guarantee agreement (Loan Guarantee Agreement) in February 2014, under which the DOE agreed to guarantee the obligations of the Company under a note purchase agreement (FFB Note Purchase Agreement) among the DOE, the Company, and the FFB and a related promissory note (FFB Promissory Note). The FFB Note Purchase Agreement and the FFB Promissory Note provide for a multi-advance term loan facility (FFB Credit Facility), under which the Company may make term loan borrowings through the FFB.
Proceeds of advances made under the FFB Credit Facility are used to reimburse the Company for a portion of certain costs of construction relating to Plant Vogtle Units 3 and 4 that are eligible for financing under the Title XVII Loan Guarantee Program (Eligible Project Costs). Aggregate borrowings under the FFB Credit Facility may not exceed the lesser of (i) 70% of Eligible Project Costs or (ii) approximately $3.46 billion.
All borrowings under the FFB Credit Facility are full recourse to the Company, and the Company is obligated to reimburse the DOE for any payments the DOE is required to make to the FFB under the guarantee. The Company's reimbursement obligations to the DOE are full recourse and secured by a first priority lien on (i) the Company's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor

NOTES (continued)
Georgia Power Company 2016 Annual Report

core) and (ii) the Company's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. There are no restrictions on the Company'sdoes, affect each Registrant's ability to grant liens on other property.
Advances may be requested under the FFB Credit Facility on a quarterly basis through 2020. The final maturity date for each advance under the FFB Credit Facility is February 20, 2044. Interest is payable quarterlyutilize certain tax credits. See "Tax Credits" and principal payments will begin on February 20, 2020. Borrowings under the FFB Credit Facility will bear interest at the applicable U.S. Treasury rate plus a spread equal to 0.375%.
In connection with its entry into the agreements with the DOEACCOUNTING POLICIES – "Application of Critical Accounting Policies and the FFB, the Company incurred issuance costs of approximately $66 million, which are being amortized over the life of the borrowings under the FFB Credit Facility.
In June and December 2016, the Company made borrowings under the FFB Credit Facility in an aggregate principal amount of $300 million and $125 million, respectively. The interest rate applicable to the $300 million principal amount is 2.571% and the interest rate applicable to the $125 million principal amount is 3.142%, both for an interest period that extends to the final maturity date of February 20, 2044.
At December 31, 2016 and 2015, the Company had $2.6 billion and $2.2 billion of borrowings outstanding under the FFB Credit Facility, respectively. Future advances are subject to satisfaction of customary conditions, as well as certification of compliance with the requirements of the Title XVII Loan Guarantee Program, including accuracy of project-related representations and warranties, delivery of updated project-related information, and evidence of compliance with the prevailing wage requirements of the Davis-Bacon Act of 1931, as amended, and certification from the DOE's consulting engineer that proceeds of the advances are used to reimburse Eligible Project Costs.
Under the Loan Guarantee Agreement, the Company is subject to customary borrower affirmative and negative covenants and events of default. In addition, the Company is subject to project-related reporting requirements and other project-specific covenants and events of default.
In the event certain mandatory prepayment events occur, the FFB's commitment to make further advances under the FFB Credit Facility will terminate and the Company will be required to prepay the outstanding principal amount of all borrowings under the FFB Credit Facility over a period of five years (with level principal amortization). Among other things, these mandatory prepayment events include (i) the termination of the Vogtle 3 and 4 Agreement; (ii) cancellation of Plant Vogtle Units 3 and 4 by the Georgia PSC, or by the Company if authorized by the Georgia PSC; and (iii) cost disallowances by the Georgia PSC that could have a material adverse effect on completion of Plant Vogtle Units 3 and 4 or the Company's ability to repay the outstanding borrowings under the FFB Credit Facility. Under certain circumstances, insurance proceeds and any proceeds from an event of taking must be applied to immediately prepay outstanding borrowings under the FFB Credit Facility. The Company also may voluntarily prepay outstanding borrowings under the FFB Credit Facility. Under the FFB Promissory Note, any prepayment (whether mandatory or optional) will be made with a make-whole premium or discount, as applicable.
In connection with any cancellation of Plant Vogtle Units 3 and 4 that results in a mandatory prepayment event, the DOE may elect to continue construction of Plant Vogtle Units 3 and 4. In such an event, the DOE will have the right to assume the Company's rights and obligations under the principal agreements relating to Plant Vogtle Units 3 and 4 and to acquire all or a portion of the Company's ownership interest in Plant Vogtle Units 3 and 4.
Capital Leases
Assets acquired under capital leases are recorded in the balance sheets as utility plant in service, and the related obligations are classified as long-term debt. At December 31, 2016 and 2015, the Company had a capital lease asset for its corporate headquarters building of $61 million, with accumulated depreciation at December 31, 2016 and 2015 of $33 million and $26 million, respectively. At December 31, 2016 and 2015, the capitalized lease obligation was $28 million and $35 million, respectively, with an annual interest rate of 7.9% for both years. For ratemaking purposes, the Georgia PSC has allowed the lease payments in cost of service with no return on the capital lease asset. The difference between the depreciation and the lease payments allowed for ratemaking purposes is recovered as operating expenses as ordered by the Georgia PSC. The annual operating expense incurred for this capital lease was not material for any year presented.
At December 31, 2016 and 2015, the Company had capital lease assets related to two PPAs with Southern Power of $149 million, with accumulated amortization at December 31, 2016 and 2015 of $19 million and $10 million, respectively. At December 31, 2016 and 2015, the related capitalized lease obligations were $141 million and $148 million, respectively. The annual interest rates range from 10% to 11% for these two capital lease PPAs. For ratemaking purposes, the Georgia PSC has included the capital lease asset amortization in cost of service and the interest in the Company's cost of debt. See Note 1 under "Affiliate Transactions" and Note 7 under "Fuel and Purchased Power Agreements" for additional information.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Assets Subject to Lien
See "DOE Loan Guarantee Borrowings" above for information regarding certain borrowings of the Company that are secured by a first priority lien on (i) the Company's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) the Company's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4.
See "Capital Leases" above for information regarding certain assets held under capital leases.
Outstanding Classes of Capital Stock
The Company currently has preferred stock, Class A preferred stock, preference stock, and common stock authorized. The Company has shares of its Class A preferred stock, preference stock, and common stock outstanding. The Company's Class A preferred stock ranks senior to the Company's preference stock and common stock with respect to payment of dividends and voluntary or involuntary dissolution. The Company's preference stock ranks senior to the common stock with respect to the payment of dividends and voluntary or involuntary dissolution. The outstanding series of the Class A preferred stock is subject to redemption at the option of the Company at any time at a redemption price equal to 100% of the par value. In addition, on or after October 1, 2017, the Company may redeem the outstanding series of the preference stock at a redemption price equal to 100% of the par value. With respect to any redemption of the preference stock prior to October 1, 2017, the redemption price includes a make-whole premium based on the present value of the liquidation amount and future dividends through the first par redemption date.
Dividend Restrictions
The Company can only pay dividends to Southern Company out of retained earnings or paid-in-capital.
Bank Credit Arrangements
At December 31, 2016, the Company had a $1.75 billion committed credit arrangement with banks, of which $1.73 billion was unused. This credit arrangement expires in 2020.
This bank credit arrangement requires payment of commitment fees based on the unused portion of the commitments. Commitment fees average less than 1/4 of 1% for the Company.
This bank credit arrangement contains a covenant that limits the Company's debt levels to 65% of total capitalization, as defined in the agreement. For purposes of this definition, debt excludes certain hybrid securities. At December 31, 2016, the Company was in compliance with the debt limit covenant.
Subject to applicable market conditions, the Company expects to renew this bank credit arrangement, as needed, prior to expiration. In connection therewith, the Company may extend the maturity date and/or increase or decrease the lending commitments thereunder.
A portion of the $1.73 billion unused credit with banks is allocated to provide liquidity support to the Company's pollution control revenue bonds and its commercial paper program. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support as of December 31, 2016 was $868 million. In addition, at December 31, 2016, the Company had $250 million of fixed rate pollution control revenue bonds outstanding that were required to be remarketed within the next 12 months.
The Company makes short-term borrowings primarily through a commercial paper program that has the liquidity support of the Company's committed bank credit arrangement described above. Commercial paper is included in notes payable in the balance sheets.
Details of commercial paper borrowings outstanding were as follows:
 Commercial Paper at the End of the Period
 
Amount
Outstanding
 Weighted Average Interest Rate
 (in millions)  
December 31, 2016$392
 1.1%
December 31, 2015$158
 0.6%

NOTES (continued)
Georgia Power Company 2016 Annual Report

7. COMMITMENTS
Fuel and Purchased Power Agreements
To supply a portion of the fuel requirements of its generating plants, the Company has entered into various long-term commitments for the procurement and delivery of fossil and nuclear fuel which are not recognized on the balance sheets. In 2016, 2015, and 2014, the Company incurred fuel expense of $1.8 billion, $2.0 billion, and $2.5 billion, respectively, the majority of which was purchased under long-term commitments. The Company expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
The Company has commitments regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the latter of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity are required whether or not any capacity is available. The energy cost is a function of each unit's variable operating costs. Portions of the capacity payments relate to costs in excess of MEAG Power's Plant Vogtle Units 1 and 2 allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity and energy is included in purchased power, non-affiliates in the statements of income. Capacity payments totaled $11 million, $10 million, and $19 million in 2016, 2015, and 2014, respectively.
The Company has also entered into various long-term PPAs, some of which are accounted for as capital or operating leases. Total capacity expense under PPAs accounted for as operating leases was $217 million, $203 million, and $167 million for 2016, 2015, and 2014, respectively. Estimated total long-term obligations at December 31, 2016 were as follows:
 Affiliate Capital Leases Affiliate Operating Leases 
Non-Affiliate
Operating
Leases(c)
 
Vogtle
Units 1 and 2
Capacity
Payments
 Total
 (in millions)
2017$22
 $72
 $123
 $8
 $225
201822
 63
 126
 7
 218
201923
 64
 127
 6
 220
202023
 65
 123
 5
 216
202124
 66
 124
 5
 219
2022 and thereafter204
 479
 882
 43
 1,608
Total$318
 $809
 $1,505
 $74
 $2,706
Less: amounts representing executory costs(a)
48
        
Net minimum lease payments270
        
Less: amounts representing interest(b)
128
        
Present value of net minimum lease payments$142
        
(a)
Executory costs such as taxes, maintenance, and insurance (including the estimated profit thereon) are estimated and included in total minimum lease payments.
(b)Calculated using an adjusted incremental borrowing rate to reduce the present value of the net minimum lease payments to fair value.
(c)A total of $197 million of biomass PPAs included under the non-affiliate operating leases is contingent upon the counterparties meeting specified contract dates for commercial operation. Subsequent to December 31, 2016, the specified contract dates for commercial operation were extended from 2017 to 2019 and may change further as a result of regulatory action.
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the Company and all of the other traditional electric operating companies and Southern Power. Under these agreements, each of the traditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with the Company and each of the other traditional electric operating companies to ensure the Company will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Operating Leases
In addition to the PPA operating leases discussed above, the Company has other operating lease agreements with various terms and expiration dates. Total rent expense was $28 million for 2016, $29 million for 2015, and $28 million for 2014. The Company includes any step rents, fixed escalations, and lease concessions in its computation of minimum lease payments.
As of December 31, 2016, estimated minimum lease payments under operating leases were as follows:
 Minimum Lease Payments
 Railcars Other Total
 (in millions)
2017$12
 $7
 $19
20186
 7
 13
20193
 6
 9
20203
 6
 9
20212
 6
 8
2022 and thereafter2
 13
 15
Total$28
 $45
 $73
Railcar minimum lease payments are disclosed at 100% of railcar lease obligations; however, a portion of these obligations is shared with the joint owners of Plants Scherer and Wansley. A majority of the rental expenses related to the railcar leases are recoverable through the fuel cost recovery clause as ordered by the Georgia PSC and the remaining portion is recovered through base rates.
In addition to the above rental commitments, the Company has obligations upon expiration of certain railcar leases with respect to the residual value of the leased property. These leases have terms expiring through 2024 with maximum obligations under these leases of $32 million. At the termination of the leases, the lessee may either renew the lease, exercise its purchase option, or the property can be sold to a third party. The Company expects that the fair market value of the leased property would substantially reduce or eliminate the Company's payments under the residual value obligations.
Guarantees
Alabama Power has guaranteed the obligations of SEGCO for $25 million of pollution control revenue bonds issued in 2001, which mature in June 2019, and also $100 million of senior notes issued in 2013, which mature in December 2018. The Company has agreed to reimburse Alabama Power for the pro rata portion of such obligations corresponding to the Company's then proportionate ownership of SEGCO's stock if Alabama Power is called upon to make such payment under its guarantee. See Note 4 for additional information.
In addition, in 2013, the Company entered into an agreement that requires the Company to guarantee certain payments of a gas supplier for Plant McIntosh for a period up to 15 years. The guarantee is expected to be terminated if certain events occur within one year of the initial gas deliveries in 2018. In the event the gas supplier defaults on payments, the maximum potential exposure under the guarantee is approximately $43 million.
As discussed earlier in this Note under "Operating Leases,Estimates" the Company has entered into certain residual value guarantees related to railcar leases.
8. STOCK COMPENSATION
Stock-Based Compensation
Stock-based compensation primarily in the form of Southern Company performance share units may be granted through the Omnibus Incentive Compensation Plan to a large segment of the Company's employees ranging from line management to executives. As of December 31, 2016, there were 990 current and former employees participating in the stock option and performance share unit programs.
Stock Options
Through 2009, stock-based compensation granted to employees consisted exclusively of non-qualified stock options. The exercise price for stock options granted equaled the stock price of Southern Company common stock on the date of grant. Stock options vest on a pro rata basis over a maximum period of three years from the date of grant or immediately upon the retirement

NOTES (continued)
Georgia Power Company 2016 Annual Report

or death of the employee. Options expire no later than 10 years after the grant date. All unvested stock options vest immediately upon a change in control where Southern Company is not the surviving corporation. Compensation expense is generally recognized on a straight-line basis over the three-year vesting period with the exception of employees that are retirement eligible at the grant date and employees that will become retirement eligible during the vesting period. Compensation expense in those instances is recognized at the grant date for employees that are retirement eligible and through the date of retirement eligibility for those employees that become retirement eligible during the vesting period. In 2015, Southern Company discontinued the granting of stock options.
The weighted average grant-date fair value of stock options granted during 2014 derived using the Black-Scholes stock option pricing model was $2.20.
The compensation cost related to the grant of Southern Company stock options to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. Compensation cost and related tax benefits recognized in the Company's financial statements were not material for any year presented. As of December 31, 2016, the amount of unrecognized compensation cost related to stock option awards not yet vested was immaterial.
The total intrinsic value of options exercised during the years ended December 31, 2016, 2015, and 2014 was $18 million, $9 million, and $19 million, respectively. No cash proceeds are received by the Company upon the exercise of stock options. The actual tax benefit realized by the Company for the tax deductions from stock option exercises totaled $7 million, $4 million, and $7 million for the years ended December 31, 2016, 2015, and 2014, respectively. Prior to the adoption of ASU 2016-09, the excess tax benefits related to the exercise of stock options were recognized in the Company's financial statements with a credit to equity. Upon the adoption of ASU 2016-09, beginning in 2016, all tax benefits related to the exercise of stock options are recognized in income. As of December 31, 2016, the aggregate intrinsic value for the options outstanding and options exercisable was $46 million and $41 million, respectively.
Performance Share Units
From 2010 through 2014, stock-based compensation granted to employees included performance share units in addition to stock options. Beginning in 2015, stock-based compensation consisted exclusively of performance share units. Performance share units granted to employees vest at the end of a three-year performance period. All unvested performance share units vest immediately upon a change in control where Southern Company is not the surviving corporation. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of performance share units granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
The performance goal for all performance share units issued from 2010 through 2014 was based on the total shareholder return (TSR) for Southern Company common stock during the three-year performance period as compared to a group of industry peers. For these performance share units, at the end of three years, active employees receive shares based on Southern Company's performance while retired employees receive a pro rata number of shares based on the actual months of service during the performance period prior to retirement. The fair value of TSR-based performance share unit awards is determined as of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among the industry peers over the performance period. The Company recognizes compensation expense on a straight-line basis over the three-year performance period without remeasurement.
Beginning in 2015, Southern Company issued two additional types of performance share units to employees in addition to the TSR-based awards. These included performance share units with performance goals based on cumulative earnings per share (EPS) over the performance period and performance share units with performance goals based on Southern Company's equity-weighted ROE over the performance period. The EPS-based and ROE-based awards each represent 25% of total target grant date fair value of the performance share unit awards granted. The remaining 50% of the target grant date fair value consists of TSR-based awards. In contrast to the Monte Carlo simulation model used to determine the fair value of the TSR-based awards, the fair values of the EPS-based awards and the ROE-based awards are based on the closing stock price of Southern Company common stock on the date of the grant. Compensation expense for the EPS-based and ROE-based awards is generally recognized ratably over the three-year performance period initially assuming a 100% payout at the end of the performance period. The TSR-based performance share units, along with the EPS-based and ROE-based awards, vest immediately upon the retirement of the employee. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. The expected payout related to the EPS-based and ROE-based awards is reevaluated annually with expense recognized to date increased or decreased based on the number of shares currently

NOTES (continued)
Georgia Power Company 2016 Annual Report

expected to be issued. Unlike the TSR-based awards, the compensation expense ultimately recognized for the EPS-based awards and the ROE-based awards will be based on the actual number of shares issued at the end of the performance period.
For the years ended December 31, 2016, 2015, and 2014, employees of the Company were granted performance share units of 261,434, 236,804, and 176,224, respectively. The weighted average grant-date fair value of TSR-based performance share units granted during 2016, 2015, and 2014, determined using a Monte Carlo simulation model to estimate the TSR of Southern Company's stock among the industry peers over the performance period, was $45.17, $46.41, and $37.54, respectively. The weighted average grant-date fair value of both EPS-based and ROE-based performance share units granted during 2016 and 2015 was $48.84 and $47.78, respectively.
For the years ended December 31, 2016, 2015, and 2014, total compensation cost for performance share units recognized in income was $15 million, $15 million, and $6 million, respectively, with the related tax benefit also recognized in income of $6 million, $6 million, and $2 million, respectively. The compensation cost related to the grant of Southern Company performance share units to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. As of December 31, 2016, $4 million of total unrecognized compensation cost related to performance share award units will be recognized over a weighted-average period of approximately 22 months.
9. NUCLEAR INSURANCE
Under the Price-Anderson Amendments Act (Act), the Company maintains agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at Plant Hatch and Plant Vogtle Units 1 and 2. The Act provides funds up to $13.4 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $375 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. The Company could be assessed up to $127 million per incident for each licensed reactor it operates but not more than an aggregate of $19 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for the Company, based on its ownership and buyback interests in all licensed reactors, is $247 million per incident, but not more than an aggregate of $37 million to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. The next scheduled adjustment is due no later than September 10, 2018. See Note 4 for additional information on joint ownership agreements.
The Company is a member of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, the Company has NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses in excess of the $1.5 billion primary coverage. In April 2014, NEIL introduced a new excess non-nuclear policy providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks, with a maximum per occurrence per unit limit of $490 million. After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted in approximately three years. The Company purchases limits based on the projected full cost of replacement power, subject to ownership limitations, and has elected a 12-week deductible waiting period for each facility.
A builders' risk property insurance policy has been purchased from NEIL for the construction of Plant Vogtle Units 3 and 4. This policy provides the Vogtle Owners up to $2.75 billion for accidental property damage occurring during construction.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for the Company as of December 31, 2016 under the NEIL policies would be $82 million.
Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate, however, that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the Company or to its debt trustees as may be appropriate under

NOTES (continued)
Georgia Power Company 2016 Annual Report

the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered from customers, would be borne by the Company and could have a material effect on the Company's financial condition and results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.
10. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of the Company of what a market participant would use in pricing an asset or liability. If there is little available market data, then the Company's own assumptions are the best available information.
In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.
As of December 31, 2016, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Energy-related derivatives$
 $44
 $
 $44
Interest rate derivatives
 2
 
 2
Nuclear decommissioning trusts:(*)
       
Domestic equity204
 1
 
 205
Foreign equity
 121
 
 121
U.S. Treasury and government agency securities
 71
 
 71
Municipal bonds
 73
 
 73
Corporate bonds
 164
 
 164
Mortgage and asset backed securities
 164
 
 164
Other11
 5
 
 16
Total$215
 $645
 $
 $860
Liabilities:       
Energy-related derivatives$
 $8
 $
 $8
Interest rate derivatives
 3
 
 3
Total$
 $11
 $
 $11
(*)Includes the investment securities pledged to creditors and collateral received, and excludes receivables related to investment income, pending investment sales, and payables related to pending investment purchases and the lending pool. See Note 1 under "Nuclear Decommissioning" for additional information.

NOTES (continued)
Georgia Power Company 2016 Annual Report

As of December 31, 2015, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Energy-related derivatives$
 $2
 $
 $2
Interest rate derivatives
 5
 
 5
Nuclear decommissioning trusts:(*)
       
Domestic equity182
 1
 
 183
Foreign equity
 113


 113
U.S. Treasury and government agency securities
 125
 
 125
Municipal bonds
 64
 
 64
Corporate bonds
 143
 
 143
Mortgage and asset backed securities
 127
 
 127
Other16
 4
 
 20
Cash equivalents63
 
 
 63
Total$261
 $584
 $
 $845
Liabilities:       
Energy-related derivatives$
 $15
 $
 $15
Interest rate derivatives
 6
 
 6
Total$
 $21
 $
 $21
(*)Includes the investment securities pledged to creditors and collateral received, and excludes receivables related to investment income, pending investment sales, and payables related to pending investment purchases and the lending pool. See Note 1 under "Nuclear Decommissioning" for additional information.
Valuation Methodologies
The energy-related derivatives primarily consist of over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard over-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk and occasionally, implied volatility of interest rate options. The interest rate derivatives are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 11 for additional information on how these derivatives are used.
The NRC requires licensees of commissioned nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. For fair value measurements of the investments within the nuclear decommissioning trusts, external pricing vendors are designated for each asset class with each security specifically assigned a primary pricing source. For investments held within commingled funds, fair value is determined at the end of each business day through the net asset value, which is established by obtaining the underlying securities' individual prices from the primary pricing source. A market price secured from the primary source vendor is then evaluated by management in its valuation of the assets within the trusts. As a general approach, fixed income market pricing vendors gather market data (including indices and market research reports) and integrate relative credit information, observed market movements, and sector news into proprietary pricing models, pricing

NOTES (continued)
Georgia Power Company 2016 Annual Report

systems, and mathematical tools. Dealer quotes and other market information, including live trading levels and pricing analysts' judgments, are also obtained when available. See Note 1 under "Nuclear Decommissioning" for additional information.
As of December 31, 2016 and 2015, other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt, including securities due within one year:   
2016$10,516
 $11,034
2015$10,145
 $10,480
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on current rates available to the Company.
11. DERIVATIVES
The Company is exposed to market risks, primarily commodity price risk and interest rate risk. To manage the volatility attributable to these exposures, the Company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 10 for additional information. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.
Energy-Related Derivatives
The Company enters into energy-related derivatives to hedge exposures to electricity, gas, and other fuel price changes. However, due to cost-based rate regulations and other various cost recovery mechanisms, the Company has limited exposure to market volatility in energy-related commodity prices. The Company manages a fuel-hedging program through the use of financial derivative contracts, which is expected to continue to mitigate price volatility. At December 31, 2016 and 2015, substantially all of the Company's energy-related derivative contracts were designated as regulatory hedges and were related to the Company's fuel-hedging program. Through December 31, 2015, the Company's fuel-hedging program had a time horizon up to 24 months. Effective January 1, 2016, the Georgia PSC approved changes to the Company's hedging program allowing it to use an array of derivative instruments within a 48-month time horizon.
Energy-related derivative contracts are accounted for under one of two methods:
Regulatory Hedges – Energy-related derivative contracts which are designated as regulatory hedges relate primarily to the Company's fuel-hedging program, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through the fuel cost recovery mechanism.
Not Designated – Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric industry. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2016, the net volume of energy-related derivative contracts for natural gas positions totaled 155 million mmBtu, all of which expire by 2020, which is the longest hedge date.
In addition to the volume discussed above, the Company enters into physical natural gas supply contracts that provide the option to sell back excess gas due to operational constraints. The expected volume of natural gas subject to such a feature is 3 million mmBtu for the Company.

NOTES (continued)
Georgia Power Company 2016 Annual Report

Interest Rate Derivatives
The Company may also enter into interest rate derivatives to hedge exposure to changes in interest rates. The derivatives employed as hedging instruments are structured to minimize ineffectiveness. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time the hedged transactions affect earnings, with any ineffectiveness recorded directly to earnings. At December 31, 2016, there were no cash flow hedges outstanding. Derivatives related to fixed rate securities are accounted for as fair value hedges, where the derivatives' fair value gains and losses and the hedged items' fair value gains and losses attributable to interest rate risk are both recorded directly to earnings, providing an offset, with any differences representing ineffectiveness.
At December 31, 2016, the following interest rate derivatives were outstanding:
 Notional
Amount
 Interest
Rate
Received
 Weighted Average Interest
Rate Paid
 Hedge
Maturity
Date
 Fair Value
Gain (Loss)
December 31,
2016
 (in millions)       (in millions)
Fair Value Hedges of Existing Debt         
 $250
 5.40% 3-month LIBOR + 4.02% June 2018 $
 500
 1.95% 3-month LIBOR + 0.76% December 2018 (2)
 200
 4.25% 3-month LIBOR + 2.46% December 2019 1
Total$950
       $(1)
The estimated pre-tax gains (losses) that will be reclassified from accumulated OCI to interest expense for the 12-month period ending December 31, 2017 total $4 million. Deferred gains and losses related to interest rate derivative settlements of cash flow hedges are expected to be amortized into earnings through 2037.
Derivative Financial Statement Presentation and Amounts
The Company enters into energy-related and interest rate derivative contracts that may contain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. At December 31, 2016, fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with the counterparties. At December 31, 2015, the fair value amounts of derivative instruments were presented gross on the balance sheets.

NOTES (continued)
Georgia Power Company 2016 Annual Report

At December 31, 2016 and 2015, the fair value of energy-related derivatives and interest rate derivatives was reflected in the balance sheets as follows:
 2016 2015
Derivative Category and Balance Sheet LocationAssetsLiabilities AssetsLiabilities
 (in millions)
Derivatives designated as hedging instruments for regulatory purposes     
Energy-related derivatives:     
Other current assets/Other current liabilities$30
$1
 $2
$12
Other deferred charges and assets/Other deferred credits and liabilities14
7
 
3
Total derivatives designated as hedging instruments for regulatory purposes$44
$8
 $2
$15
Derivatives designated as hedging instruments in cash flow and fair value hedges     
Interest rate derivatives:     
Other current assets/Other current liabilities$2
$
 $5
$
Other deferred charges and assets/Other deferred credits and liabilities
3
 
6
Total derivatives designated as hedging instruments in cash flow and fair value hedges$2
$3
 $5
$6
Gross amounts recognized$46
$11
 $7
$21
Gross amounts offset$(8)$(8) $(6)$(6)
Net amounts recognized in the Balance Sheets(*)
$38
$3
 $1
$15
(*)At December 31, 2015, the fair value amounts for derivative contracts subject to netting arrangements were presented gross on the balance sheet.
Energy-related derivatives not designated as hedging instruments were immaterial on the balance sheets for 2016 and 2015.
At December 31, 2016 and 2015, the pre-tax effects of unrealized derivative gains (losses) arising from energy-related derivatives designated as regulatory hedging instruments and deferred were as follows:
 Unrealized Losses Unrealized Gains
Derivative CategoryBalance Sheet Location2016 2015 Balance Sheet Location2016 2015
  (in millions)  (in millions)
Energy-related derivatives:(*)
Other regulatory assets, current$
 $(12) Other regulatory liabilities, current$29
 $2
 Other regulatory assets, deferred
 (3) Other deferred credits and liabilities7
 
Total energy-related derivative gains (losses) $
 $(15)  $36
 $2
(*)At December 31, 2016, the unrealized gains and losses for energy-related derivative contracts subject to netting arrangements were presented net on the balance sheet. At December 31, 2015, the unrealized gains and losses for energy-related derivative contracts subject to netting arrangements were presented gross on the balance sheet.

NOTES (continued)
Georgia Power Company 2016 Annual Report

For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of interest rate derivatives designated as cash flow hedging instruments on the statements of income were as follows:
Derivatives in Cash Flow Hedging RelationshipsGain (Loss) Recognized in OCI on Derivative (Effective Portion) Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
        Amount
Derivative Category2016 2015 2014 Statements of Income Location2016 2015 2014
 (in millions)  (in millions)
Interest rate derivatives$
 $(15) $(8) Interest expense, net of amounts capitalized$(4) $(3) $(3)
For the years ended December 31, 2016 and 2015, the pre-tax effects of interest rate derivatives designated as fair value hedging instruments on the statements of income were immaterial on a gross basis for the Company. Furthermore, the pre-tax effect of interest rate derivatives designated as fair value hedging instruments on the Company's statements of income were offset by changes to the carrying value of long-term debt. The gains and losses related to interest rate derivative settlements of fair value hedges are recorded directly to earnings.
There was no material ineffectiveness recorded in earnings for any period presented. The pre-tax effect of energy-related derivatives not designated as hedging instruments on the statements of income was immaterial for all years presented.
Contingent Features
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain affiliated companies. At December 31, 2016, the Company's collateral posted with its derivative counterparties was immaterial.
At December 31, 2016, the fair value of derivative liabilities with contingent features, including certain agreements that could require collateral in the event that one or more Southern Company system power pool participants has a credit rating change to below investment grade because of joint and several liability features underlying these derivatives, was immaterial.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. The Company has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk. Therefore, the Company does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance.

NOTES (continued)
Georgia Power Company 2016 Annual Report

12. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Summarized quarterly financial information for 2016 and 2015 is as follows:
Quarter EndedOperating Revenues Operating Income Net Income After Dividends on Preferred and Preference Stock
 (in millions)
March 2016$1,872
 $509
 $269
June 20162,051
 656
 349
September 20162,698
 1,054
 599
December 20161,762
 258
 113

     
March 2015$1,978
 $454
 $236
June 20152,016
 554
 277
September 20152,691
 964
 551
December 20151,641
 376
 196
In accordance with the adoption of ASU 2016-09 (see Note 1 under "Recently Issued Accounting Standards"), previously reported amounts for income tax expense were reduced by $1 million in the third quarter 2016, $2 million in the second quarter 2016, and $1 million in the first quarter 2016.
The Company's business is influenced by seasonal weather conditions.

SELECTED FINANCIAL AND OPERATING DATA 2012-2016
Georgia Power Company 2016 Annual Report
 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions)$8,383
 $8,326
 $8,988
 $8,274
 $7,998
Net Income After Dividends
on Preferred and Preference Stock (in millions)
$1,330
 $1,260
 $1,225
 $1,174
 $1,168
Cash Dividends on Common Stock (in millions)$1,305
 $1,034
 $954
 $907
 $983
Return on Average Common Equity (percent)12.05
 11.92
 12.24
 12.45
 12.76
Total Assets (in millions)(a)(b)
$34,835
 $32,865
 $30,872
 $28,776
 $28,618
Gross Property Additions (in millions)$2,314
 $2,332
 $2,146
 $1,906
 $1,838
Capitalization (in millions):         
Common stock equity$11,356
 $10,719
 $10,421
 $9,591
 $9,273
Preferred and preference stock266
 266
 266
 266
 266
Long-term debt(a)
10,225
 9,616
 8,563
 8,571
 7,928
Total (excluding amounts due within one year)$21,847
 $20,601
 $19,250
 $18,428
 $17,467
Capitalization Ratios (percent):         
Common stock equity52.0
 52.0
 54.1
 52.0
 53.1
Preferred and preference stock1.2
 1.3
 1.4
 1.4
 1.5
Long-term debt(a)
46.8
 46.7
 44.5
 46.6
 45.4
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential2,155,945
 2,127,658
 2,102,673
 2,080,358
 2,062,040
Commercial(c)
305,488
 302,891
 300,186
 297,493
 295,523
Industrial(c)
10,537
 10,429
 10,192
 10,063
 10,017
Other9,585
 9,261
 9,003
 8,623
 7,724
Total2,481,555
 2,450,239
 2,422,054
 2,396,537
 2,375,304
Employees (year-end)7,527
 7,989
 7,909
 7,886
 8,094
(a)A reclassification of debt issuance costs from Total Assets to Long-term debt of $124 million, $62 million, and $67 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(b)A reclassification of deferred tax assets from Total Assets of $34 million, $68 million, and $117 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(c)A reclassification of customers from commercial to industrial is reflected for years 2012-2015 to be consistent with the rate structure approved by the Georgia PSC. The impact to operating revenues, kilowatt-hour sales, and average revenue per kilowatt-hour by class is not material.


SELECTED FINANCIAL AND OPERATING DATA 2012-2016 (continued)
Georgia Power Company 2016 Annual Report
 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions):         
Residential$3,318
 $3,240
 $3,350
 $3,058
 $2,986
Commercial3,077
 3,094
 3,271
 3,077
 2,965
Industrial1,291
 1,305
 1,525
 1,391
 1,322
Other86
 88
 94
 94
 89
Total retail7,772
 7,727
 8,240
 7,620
 7,362
Wholesale — non-affiliates175
 215
 335
 281
 281
Wholesale — affiliates42
 20
 42
 20
 20
Total revenues from sales of electricity7,989
 7,962
 8,617
 7,921
 7,663
Other revenues394
 364
 371
 353
 335
Total$8,383
 $8,326
 $8,988
 $8,274
 $7,998
Kilowatt-Hour Sales (in millions):         
Residential27,585
 26,649
 27,132
 25,479
 25,742
Commercial32,932
 32,719
 32,426
 31,984
 32,270
Industrial23,746
 23,805
 23,549
 23,087
 23,089
Other610
 632
 633
 630
 641
Total retail84,873
 83,805
 83,740
 81,180
 81,742
Wholesale — non-affiliates3,415
 3,501
 4,323
 3,029
 2,934
Wholesale — affiliates1,398
 552
 1,117
 496
 600
Total89,686
 87,858
 89,180
 84,705
 85,276
Average Revenue Per Kilowatt-Hour (cents):         
Residential12.03
 12.16
 12.35
 12.00
 11.60
Commercial9.34
 9.46
 10.09
 9.62
 9.19
Industrial5.44
 5.48
 6.48
 6.03
 5.73
Total retail9.16
 9.22
 9.84
 9.39
 9.01
Wholesale4.51
 5.80
 6.93
 8.54
 8.52
Total sales8.91
 9.06
 9.66
 9.35
 8.99
Residential Average Annual
Kilowatt-Hour Use Per Customer
12,864
 12,582
 12,969
 12,293
 12,509
Residential Average Annual
Revenue Per Customer
$1,557
 $1,529
 $1,605
 $1,475
 $1,451
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
15,274
 15,455
 17,593
 17,586
 17,984
Maximum Peak-Hour Demand (megawatts):         
Winter14,527
 15,735
 16,308
 12,767
 14,104
Summer16,244
 16,104
 15,777
 15,228
 16,440
Annual Load Factor (percent)61.9
 61.9
 61.2
 63.5
 59.1
Plant Availability (percent):         
Fossil-steam87.4
 85.6
 86.3
 87.1
 90.3
Nuclear95.6
 94.1
 90.8
 91.8
 94.1
Source of Energy Supply (percent):         
Coal26.4
 24.5
 30.9
 26.4
 26.6
Nuclear17.6
 17.6
 16.7
 17.7
 18.3
Hydro1.1
 1.6
 1.3
 2.0
 0.7
Oil and gas28.2
 28.3
 26.3
 29.6
 22.0
Purchased power —         
From non-affiliates6.7
 5.0
 3.8
 3.3
 6.8
From affiliates20.0
 23.0
 21.0
 21.0
 25.6
Total100.0
 100.0
 100.0
 100.0
 100.0


GULF POWER COMPANY
FINANCIAL SECTION


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Gulf Power Company 2016 Annual Report
The management of Gulf Power Company (the Company) is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of the Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2016.
/s/ S. W. Connally, Jr.
S. W. Connally, Jr.
Chairman, President, and Chief Executive Officer
/s/ Xia Liu
Xia Liu
Vice President and Chief Financial Officer
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Gulf Power Company

We have audited the accompanying balance sheets and statements of capitalization of Gulf Power Company (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2016. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such financial statements (pages II-342 to II-379) present fairly, in all material respects, the financial position of Gulf Power Company as of December 31, 2016 and 2015, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017


DEFINITIONS
TermMeaning
AFUDCAllowance for funds used during construction
Alabama PowerAlabama Power Company
AROAsset retirement obligation
ASCAccounting Standards Codification
ASUAccounting Standards Update
CCRCoal combustion residuals
Clean Air ActClean Air Act Amendments of 1990
CO2
Carbon dioxide
EPAU.S. Environmental Protection Agency
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
GAAPU.S. generally accepted accounting principles
Georgia PowerGeorgia Power Company
IRSInternal Revenue Service
ITCInvestment tax credit
KWHKilowatt-hour
Mississippi PowerMississippi Power Company
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MWMegawatt
OCIOther comprehensive income
power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PPAPower purchase agreement
PSCPublic Service Commission
ROEReturn on equity
S&PS&P Global Ratings, a division of S&P Global Inc.
scrubberFlue gas desulfurization system
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
Southern CompanyThe Southern Company
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiaries
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), Southern Electric Generating Company, Southern Nuclear, SCS, Southern LINC, PowerSecure, Inc. (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.
Southern PowerSouthern Power Company and its subsidiaries
traditional electric operating companiesAlabama Power, Georgia Power, Gulf Power Company, and Mississippi Power


MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Gulf Power Company 2016 Annual Report
OVERVIEW
Business Activities
Gulf Power Company (the Company) operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located in northwest Florida and to wholesale customers in the Southeast.
Many factors affect the opportunities, challenges, and risks of the Company's business of providing electric service. These factors include the ability to maintain a constructive regulatory environment, to maintain and grow energy sales, and to effectively manage and secure timely recovery of costs. These costs include those related to projected long-term demand growth, stringent environmental standards, reliability, restoration following major storms, fuel, and capital expenditures. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Company for the foreseeable future. Through 2015, long-term non-affiliate capacity sales from the Company's ownership of Plant Scherer Unit 3 (205 MWs) provided the majority of the Company's wholesale earnings. Contract expirations at the end of 2015 and the end of May 2016 related to Plant Scherer Unit 3 wholesale sales had a material negative impact on the Company's earnings in 2016. Remaining contract sales from Plant Scherer Unit 3 cover approximately 24% of the Company's ownership of the unit through 2019.
In 2013, the Florida PSC approved the settlement agreement (2013 Rate Case Settlement Agreement) among the Company and all of the intervenors to the Company's retail base rate case. Under the terms of the 2013 Rate Case Settlement Agreement, the Company (1) increased base rates approximately $35 million and $20 million annually effective January 2014 and 2015, respectively; (2) continued its authorized retail ROE midpoint (10.25%) and range (9.25% – 11.25%); (3) may reduce depreciation expense and record a regulatory asset that will be included as an offset to the other cost of removal regulatory liability in an aggregate amount up to $62.5 million between January 2014 and June 2017, of which $28.5 million had been recorded as of December 31, 2016; and (4) accrued a return similar to AFUDC on certain transmission system upgrades placed into service after January 2014 through January 1, 2017.
On October 12, 2016, the Company filed a petition (2016 Rate Case) with the Florida PSC requesting an annual increase in retail rates and charges of $106.8 million based on the projected test year of January 1, 2017 through December 31, 2017 and a retail ROE of 11% compared to the current retail ROE of 10.25%. The requested increase includes recovery of the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers following the contract expirations discussed above. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, the Company may consider an asset sale. The current book value of the Company's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. The Florida PSC is expected to make a decision on the 2016 Rate Case in the second quarter 2017. The Company has requested that the increase in base rates, if approved by the Florida PSC, become effective in July 2017.
On November 2, 2016, the Florida PSC approved the Company's 2017 annual cost recovery clause factors. The fuel and environmental factors include certain costs associated with the ongoing ownership and operation of Plant Scherer Unit 3. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Cost Recovery Clauses" herein for additional information.
The Company continues to focus on several key performance indicators including, but not limited to, customer satisfaction, plant availability, system reliability, and net income after dividends on preference stock. The Company's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys to evaluate the Company's results and generally targets the top quartile of these surveys in measuring performance.
See RESULTS OF OPERATIONS herein for information on the Company's financial performance.
Earnings
The Company's 2016 net income after dividends on preference stock was $131 million, representing a $17 million, or 11.5%, decrease over the previous year. The decrease was primarily due to lower wholesale revenues and higher depreciation, partially offset by higher retail revenues and lower operations and maintenance expenses as compared to the corresponding period in 2015.
In 2015, the net income after dividends on preference stock was $148 million, representing an $8 million, or 5.7%, increase over the previous year. The increase was primarily due to an increase in retail base revenues effective January 1, 2015 and a reduction in depreciation, both as authorized in the 2013 Rate Case Settlement Agreement, partially offset by higher operations and maintenance expenses as compared to the corresponding period in 2014.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

RESULTS OF OPERATIONS
A condensed statement of income follows:
 Amount 
Increase (Decrease)
from Prior Year
 2016 2016 2015
 (in millions)
Operating revenues$1,485
 $2
 $(107)
Fuel432
 (13) (160)
Purchased power142
 7
 28
Other operations and maintenance336
 (18) 13
Depreciation and amortization172
 31
 (4)
Taxes other than income taxes120
 2
 7
Total operating expenses1,202
 9
 (116)
Operating income283
 (7) 9
Total other income and (expense)(52) (11) 3
Income taxes91
 (1) 4
Net income140
 (17) 8
Dividends on preference stock9
 
 
Net income after dividends on preference stock$131
 $(17) $8
Operating Revenues
Operating revenues for 2016 were $1.49 billion, reflecting an increase of $2 million from 2015. Details of operating revenues were as follows:
 Amount
 2016 2015
 (in millions)
Retail — prior year$1,249
 $1,267
Estimated change resulting from –   
Rates and pricing30
 22
Sales growth
 
Weather1
 3
Fuel and other cost recovery1
 (43)
Retail — current year1,281
 1,249
Wholesale revenues –   
Non-affiliates61
 107
Affiliates75
 58
Total wholesale revenues136
 165
Other operating revenues68
 69
Total operating revenues$1,485
 $1,483
Percent changeN/M
 (6.7)%
N/M - Not meaningful
In 2016, retail revenues increased $32 million, or 2.6%, when compared to 2015 primarily as a result of an increase in the Company's environmental cost recovery clause revenues, partially offset by a decrease in the energy conservation clause revenues. In 2015, retail revenues decreased $18 million, or 1.4%, when compared to 2014 primarily as a result of lower fuel cost recovery revenues partially offset by higher revenues associated with purchased power capacity costs and higher revenues resulting from an increase in retail base rates, as authorized in the 2013 Rate Case Settlement Agreement, as well as an increase in

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

the environmental and energy conservation cost recovery clause rates, both effective in January 2015. See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales growth and weather.
In 2016, revenues associated with changes in rates and pricing increased primarily due to an increase in the environmental cost recovery clause as a result of additional rate base investment related to environmental compliance equipment placed in service at the end of 2015 as well as portions of the Company's ownership in Plant Scherer Unit 3 that were rededicated to retail service in 2016. In 2015, revenues associated with changes in rates and pricing included higher revenues due to increases in retail base rates and the Company's environmental and energy conservation cost recovery clauses. Annually, the Company petitions the Florida PSC for recovery of projected environmental and energy conservation costs, including any true-up amount from prior periods, and approved rates are implemented each January. The recovery provisions include related expenses and a return on average net investment.
Fuel and other cost recovery provisions include fuel expenses, the energy component of purchased power costs, purchased power capacity costs, and the difference between projected and actual costs and revenues related to energy conservation and environmental compliance. Annually, the Company petitions the Florida PSC for recovery of projected fuel and purchased power costs, including any true-up amount from prior periods, and approved rates are implemented each January. The recovery provisions generally equal the related expenses and have no material effect on earnings.
See Note 1 to the financial statements under "Revenues" and Note 3 to the financial statements under "Retail Regulatory Matters" for additional information regarding the Company's retail base rate case and cost recovery clauses, including the Company's fuel cost recovery, purchased power capacity recovery, environmental cost recovery, and energy conservation cost recovery clauses.
Wholesale revenues from power sales to non-affiliated utilities were as follows:
 2016 2015 2014
 (in millions)
Capacity and other$30
 $67
 $65
Energy31
 40
 64
Total non-affiliated$61
 $107
 $129
Wholesale revenues from sales to non-affiliates consist of long-term sales agreements to other utilities in Florida and Georgia and short-term opportunity sales. Capacity revenues from long-term sales agreements represent the greatest contribution to net income. The energy is generally sold at variable cost. Short-term opportunity sales are made at market-based rates that generally provide a margin above the Company's variable cost of energy. Wholesale energy revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of the Company's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. See FUTURE EARNINGS POTENTIAL – "General" for additional information regarding the expiration of long-term sales agreements for Plant Scherer Unit 3, which will materially impact future wholesale earnings.
In 2016, wholesale revenues from sales to non-affiliates decreased $46 million, or 43.0%, as compared to the prior year primarily due to a 55.3% decrease in capacity revenues resulting from the expiration of Plant Scherer Unit 3 long-term sales agreements at the end of 2015 and the end of May 2016. In 2015, wholesale revenues from sales to non-affiliates decreased $22 million, or 17.1%, as compared to the prior year primarily due to a 37.7% decrease in KWH sales resulting from lower sales under the Plant Scherer Unit 3 long-term sales agreements due to a planned outage and lower natural gas prices that led to increased self-generation from customer-owned units.
Wholesale revenues from sales to affiliated companies will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the Intercompany Interchange Contract (IIC), as approved by the FERC. These transactions do not have a significant impact on earnings since the revenue related to these energy sales generally offsets the cost of energy sold. In 2016, wholesale revenues from sales to affiliates increased $17 million, or 29.3%, as compared to the prior year primarily due to a 46.1% increase in KWH sales to affiliates due to lower planned unit outages for the Company's generation resources and a 7.9% increase in the price of energy sold to affiliates due to more sales during peak load hours. In 2015, wholesale revenues from sales to affiliates decreased $72 million, or 55.4%, as compared to the prior year primarily due to a 23.5% decrease in the price of energy sold to affiliates due to lower power pool interchange rates resulting from lower natural gas prices and a 42.0% decrease in KWH sales that resulted from the availability of lower-cost generation alternatives.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

In 2016, other operating revenues decreased by an immaterial amount compared to 2015. In 2015, other operating revenues increased $5 million, or 7.8%, as compared to the prior year primarily due to a $2 million increase in franchise fees and a $2 million increase in revenues from other energy services. Franchise fees have no impact on net income. Revenues from other energy services did not have a material effect on net income since they were generally offset by associated expenses.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2016 and the percent change from the prior year were as follows:
 
Total
KWHs
 
Total KWH
Percent Change
 
Weather-Adjusted
Percent Change
 2016 2016 2015 2016 2015
 (in millions)
        
Residential5,358
 (0.1)%  % (0.2)% (1.0)%
Commercial3,869
 (0.7) 1.6
 (1.5) 0.3
Industrial1,830
 1.8
 (2.8) 1.8
 (2.8)
Other25
 (0.8) (0.1) (0.8) (0.1)
Total retail11,082
 
 0.1
 (0.3)% (0.8)%
Wholesale         
Non-affiliates751
 (27.8) (37.7)    
Affiliates2,784
 46.1
 (42.0)    
Total wholesale3,535
 20.0
 (40.5)    
Total energy sales14,617
 4.2 % (12.5)%    
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers.
Residential KWH sales decreased in 2016 compared to 2015 due to declining use per customer primarily resulting from energy efficiency improvements, partially offset by customer growth and warmer weather during the third quarter. Residential KWH sales increased minimally in 2015 compared to 2014 due to customer growth and warmer weather in the second and third quarters of 2015, mostly offset by a decline in use per customer, primarily resulting from efficiency improvements.
Commercial KWH sales decreased in 2016 compared to 2015 due to declining use per customer, primarily resulting from energy efficiency improvements, partially offset by customer growth and warmer weather during the third quarter. Commercial KWH sales increased in 2015 compared to 2014 due to customer growth and warmer weather in the second and third quarters of 2015, partially offset by a decline in use per customer, primarily resulting from efficiency improvements.
Industrial KWH sales increased in 2016 compared to 2015 primarily due to decreased customer co-generation, partially offset by changes in customers' operations. Industrial KWH sales decreased in 2015 compared to 2014 primarily due to increased customer co-generation as a result of lower natural gas prices, partially offset by increases due to changes in customers' operations.
See "Operating Revenues" above for a discussion of significant changes in wholesale sales to non-affiliates and affiliated companies.
Fuel and Purchased Power Expenses
Fuel costs constitute the single largest expense for the Company. The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel, and the availability of generating units. Additionally, the Company purchases a portion of its electricity needs from the wholesale market.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

Details of the Company's generation and purchased power were as follows:
 2016 2015 2014
Total generation (in millions of KWHs)
8,259
 8,629
 11,109
Total purchased power (in millions of KWHs)
6,973
 5,976
 5,547
Sources of generation (percent) –
     
Coal57
 57
 67
Gas43
 43
 33
Cost of fuel, generated (in cents per net KWH) –
     
Coal3.68
 3.88
 4.03
Gas4.17
 4.22
 3.93
Average cost of fuel, generated (in cents per net KWH)
3.89
 4.03
 3.99
Average cost of purchased power (in cents per net KWH)(*)
3.63
 3.89
 4.83
(*)Average cost of purchased power includes fuel purchased by the Company for tolling agreements where power is generated by the provider.
In 2016, total fuel and purchased power expenses were $574 million, a decrease of $6 million, or 1.0%, from the prior year costs. The decrease was primarily the result of a $30 million decrease due to a lower average cost of fuel and purchased power, largely offset by a $24 million increase due to a higher volume of KWHs generated and purchased.
In 2015, total fuel and purchased power expenses were $580 million, a decrease of $132 million, or 18.5%, from the prior year costs. The decrease was primarily the result of a $79 million decrease due to a lower volume of KWHs generated and purchased and a $53 million decrease due to a lower average cost of fuel and purchased power.
Fuel and purchased power transactions do not have a significant impact on earnings since energy and capacity expenses are generally offset by energy and capacity revenues through the Company's fuel and purchased power capacity cost recovery clauses and long-term wholesale contracts. See Note 3 to the financial statements under "Retail Regulatory Matters – Cost Recovery Clauses – Retail Fuel Cost Recovery" and " – Purchased Power Capacity Recovery" for additional information.
Fuel
Fuel expense was $432 million in 2016, a decrease of $13 million, or 2.9%, from the prior year costs. The decrease was primarily due to a 3.5% decrease in the average cost of fuel due to lower coal and natural gas prices and a 4.3% lower volume of KWHs generated due to an increase in KWHs purchased from lower-cost gas-fired PPA resources. In 2015, fuel expense was $445 million, a decrease of $160 million, or 26.4%, from the prior year costs. The decrease was primarily due to a 22.3% lower volume of KWHs generated due to the availability of lower-cost generation alternatives, partially offset by a 1.0% increase in the average cost of fuel due to higher natural gas prices per KWH generated.
Purchased Power Non-Affiliates
Purchased power expense from non-affiliates was $126 million in 2016, an increase of $26 million, or 26.0%, from the prior year. The increase was primarily due to a 41.2% increase in the volume of KWHs purchased due to an increase in energy purchased from gas-fired PPA resources, partially offset by a 14.9% decrease in the average cost per KWH purchased, both due to lower energy costs from gas-fired resources. In 2015, purchased power expense from non-affiliates was $100 million, an increase of $18 million, or 22.0%, from the prior year. The increase was primarily due to a $26 million increase in capacity costs associated with a scheduled price increase for an existing PPA, partially offset by the expiration of another PPA, an 11.9% decrease in the average cost per KWH purchased due to lower market prices for fuel, and a 7.8% decrease in the volume of KWHs purchased due to the availability of lower-cost generation alternatives.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy as compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Purchased Power – Affiliates
Purchased power expense from affiliates was $16 million in 2016, a decrease of $19 million, or 54.3%, from the prior year. The decrease was primarily due to a 53.9% decrease in the volume of KWHs purchased primarily due to increased supply from the Company's fossil and wind resources, partially offset by a 0.4% increase in the average cost per KWH purchased from power pool resources. In 2015, purchased power expense from affiliates was $35 million, an increase of $10 million, or 40.0%, from the prior

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

year. The increase was primarily due to a 108.9% increase in the volume of KWHs purchased primarily due to the availability of lower-cost generation alternatives available from the power pool, partially offset by a 34.2% decrease in the average cost per KWH purchased due to lower power pool interchange rates.
Energy purchases from affiliates will vary depending on demand and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, all as approved by the FERC.
Other Operations and Maintenance Expenses
In 2016, other operations and maintenance expenses decreased $18 million, or 5.1%, compared to the prior year primarily due to decreases of $7 million in marketing incentive programs and $6 million in routine and planned maintenance expenses at generation facilities. Also contributing to the decrease was $4 million in rate case expense amortization recorded in 2015 and a $3 million reduction in employee compensation and benefits expenses including pension costs. In 2015, other operations and maintenance expenses increased $13 million, or 3.8%, compared to the prior year primarily due to increases of $6 million in employee compensation and benefits expenses including pension costs, $3 million in rate case expense amortization, and $2 million in energy service contracts.
Expenses from marketing incentive programs and energy services did not have a significant impact on earnings since they were generally offset by associated revenues. Rate case expenses were amortized as authorized in the 2013 Rate Case Settlement Agreement. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Cost Recovery Clauses" herein and Note 210 to the financial statements for additional information relatedinformation.
Federal Tax Reform Legislation
In 2017, the Tax Reform Legislation was signed into law and became effective on January 1, 2018. The Tax Reform Legislation, among other things, reduced the federal corporate income tax rate to rate case expenses21%, retained normalization provisions for public utility property and pension costs, respectively.
Depreciationexisting renewable energy incentives, and Amortization
Depreciation and amortization increased $31 million, or 22.0%, in 2016 comparedrepealed the corporate alternative minimum tax. In addition, under the Tax Reform Legislation, NOLs generated after December 31, 2017 can no longer be carried back to previous tax years but can be carried forward indefinitely, with utilization limited to 80% of taxable income of the priorsubsequent tax year. The increase was primarily due to aprojected reduction in depreciation of $20.1 million recorded in 2015, as authorized inSouthern Company's consolidated income tax liability resulting from the 2013 Rate Case Settlement Agreement,tax rate reduction also delays the expected utilization of existing tax credit carryforwards. See "Consolidated Income Taxes" herein and an increase of $9 million primarily attributable to property additions to utility plant. In 2015, depreciation and amortization decreased $4 million, or 2.8%, compared to the prior year. As authorized in the 2013 Rate Case Settlement Agreement, the Company recorded $11.7 million more of a reduction in depreciation in 2015 than in 2014. This decrease was partially offset by an increase of $8 million primarily attributable to property additions at transmission and distribution facilities. See Note 310 to the financial statements under "Retail Regulatory Matters – Retail Base Rate Cases" for additional information.
Taxes Other Than Income Taxes
Taxes other thaninformation on Southern Company's joint consolidated income taxes increased $2 million, or 1.7%, in 2016 compared to the prior year primarily due to increases of $2 million in property taxes. In 2015, taxes other than income taxes increased $7 million, or 6.3%, compared to the prior year primarily due to increases of $3 million in property taxes, $2 million in franchise fees, and $2 million in gross receipts taxes. Gross receipts taxes and franchise fees are based on billed revenues and have no impact on net income. These taxes are collected from customers and remitted to governmental agencies.
Total Other Income and (Expense)
In 2016, total other income and (expense) decreased $11 million, or 26.8%, compared to the prior year primarily due to a decrease of $13 million in AFUDC equity related to environmental control projects at generating facilities and transmission projects placed in service in 2015, partially offset by a $2 million decrease in interest expense, net of amounts capitalized, primarily due to the redemption of debt. In 2015, total other income and (expense) increased $3 million, or 6.8%, primarily due to $6 million in deferred returns on transmission projects, which reduced interest expense and were recorded as a regulatory asset, as authorized in the 2013 Rate Case Settlement Agreement. This decrease was partially offset by a $2 million net increase in interest expense related to long-term debt resulting from the issuance of senior notes in 2014. See Note 1 to the financial statements under "Allowance for Funds Used During Construction" for additional information.
Effects of Inflation
The Company is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on the Company's results of operations has not been substantial in recent years.tax allocation agreement.


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report

FUTURE EARNINGS POTENTIAL
General
The Company operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located in northwest Florida and to wholesale customers in the Southeast. Prices for electricity provided by the Company to retail customers are set by the Florida PSC under cost-based regulatory principles. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Utility Regulation" herein and Note 3 to the financial statements under "Retail Regulatory Matters" for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of the Company's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Company's business of selling electricity. These factors include the Company's ability to maintain a constructive regulatory environment that continues to allow for the timely recovery of prudently-incurred costs during a time of increasing costs and limited projected demand growth over the next several years, and the outcome of the 2016 Rate Case. Future earnings will be driven primarily by customer growth. Earnings will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies due to changes in the minimum allowable equipment efficiencies along with the continuation of changes in customer behavior. Earnings are subject to a variety of other factors. These factors include weather, competition, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of electricity, the price elasticity of demand, and the rate of economic growth or decline in the Company's service territory. Demand for electricity is primarily driven by economic growth. The pace of economic growth and electricity demand may be affected by changes in regional and global economic conditions, which may impact future earnings. Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction. The ultimate impact of any tax reform proposals is dependent on the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on the Company's financial statements.
Through 2015, long-term non-affiliate capacity sales from the Company's ownership of Plant Scherer Unit 3 provided the majority of the Company's wholesale earnings. Contract expirations at the end of 2015 and the end of May 2016 related to Plant Scherer Unit 3 wholesale sales had a material negative impact on the Company's earnings in 2016. Remaining contract sales from Plant Scherer Unit 3 cover approximately 24% of the Company's ownership of the unit through 2019. The Company has requested recovery through retail rates for the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers. Therefore, the retail recoverability of these costs will be decided in the 2016 Rate Case. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, the Company may consider an asset sale. The current book value of the Company's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. See Note 3 to the financial statements under "Retail Regulatory Matters – Retail Base Rate Cases" for additional information.
Environmental Matters
Compliance costs related to federal and state environmental statutes and regulations could affect earnings if such costs cannot continue to be fully recovered in retail rates or through long-term wholesale agreements on a timely basis or through market-based contracts. The State of Florida has statutory provisions that allow a utility to petition the Florida PSC for recovery of prudent environmental compliance costs that are not being recovered through base rates or any other recovery mechanism. The Company's current long-term wholesale agreements contain provisions that permit charging the customer with costs incurred as a result of changes in environmental laws and regulations. The full impact of any such legislative or regulatory changes cannot be determined at this time. Environmental compliance spending over the next several years may differ materially from the amounts estimated. The timing, specific requirements, and estimated costs could change as environmental statutes and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are completed. Further, higher costs that are recovered through regulated rates or long-term wholesale agreements could contribute to reduced demand for electricity as well as impact the cost competitiveness of wholesale capacity, which could negatively affect results of operations, cash flows, and financial condition. See "Other Matters" herein and Note 3 to the financial statements under "Environmental Matters" and "Retail Regulatory Matters – Cost Recovery Clauses – Environmental Cost Recovery" for additional information, including a discussion on the State of Florida's statutory provisions on environmental cost recovery.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

Environmental Statutes and Regulations
General
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Applicable statutes include the Clean Air Act; the Clean Water Act; the Comprehensive Environmental Response, Compensation, and Liability Act; the Resource Conservation and Recovery Act; the Toxic Substances Control Act; the Emergency Planning & Community Right-to-Know Act; the Endangered Species Act; the Migratory Bird Treaty Act; the Bald and Golden Eagle Protection Act; and related federal and state regulations. Compliance with these environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions. Through 2016, the Company had invested approximately $1.9 billion in environmental capital retrofit projects to comply with these requirements, with annual totals of approximately $28 million, $116 million, and $227 million for 2016, 2015, and 2014, respectively. The Company expects that capital expenditures to comply with environmental statutes and regulations will total approximately $245 million from 2017 through 2021, with annual totals of approximately $33 million, $52 million, $57 million, $55 million, and $48 million for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential capital expenditures that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. The Company also anticipates costs associated with ash pond closure and ground water monitoring under the Disposal of Coal Combustion Residuals from Electric Utilities final rule (CCR Rule) and the closure of an ash pond at Plant Scholz, which are reflected in the Company's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 1 to the financial statements under "Asset Retirement Obligations and Other Cost of Removal" for additional information.
The Company's ultimate environmental compliance strategy, including potential unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations, including the environmental regulations described below; the time periods over which compliance with regulations is required; individual state implementation of regulations, as applicable; the outcome of any legal challenges to the environmental rules; any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology; the Company's fuel mix; and environmental remediation requirements. Compliance costs may arise from existing unit retirements, installation of additional environmental controls, upgrades to the transmission system, closure and monitoring of CCR facilities, and adding or changing fuel sources for certain existing units. The ultimate outcome of these matters cannot be determined at this time.
Compliance with any new federal or state legislation or regulations relating to air, water, and land resources or other environmental and health concerns could significantly affect the Company. Although new or revised environmental legislation or regulations could affect many areas of the Company's operations, the full impact of any such changes cannot be determined at this time. Additionally, many of the Company's commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity.
Air Quality
Compliance with the Clean Air Act and resulting regulations has been and will continue to be a significant focus for the Company.
In 2012, the EPA finalized the Mercury and Air Toxics Standards (MATS) rule, which imposes stringent emissions limits for acid gases, mercury, and particulate matter on coal- and oil-fired electric utility steam generating units. The implementation strategy for the MATS rule included emission controls, retirements, and fuel conversions at affected units. All of the Company's units that are subject to the MATS rule completed the measures necessary to achieve compliance with this rule or were retired prior to or during 2016.
The EPA regulates ground level ozone concentrations through implementation of an eight-hour ozone National Ambient Air Quality Standard (NAAQS). In 2008, the EPA adopted a revised eight-hour ozone NAAQS and published its final area designations in 2012. All areas within the Company's service territory have achieved attainment of the 2008 standard. In October 2015, the EPA published a more stringent eight-hour ozone NAAQS. This new standard could potentially require additional emission controls, improvements in control efficiency, and operational fuel changes and could affect the siting of new generating facilities. States were required to recommend area designations by October 2016, and no areas within the Company's service territory were proposed for designation as nonattainment.
The EPA regulates fine particulate matter concentrations through an annual and 24-hour average NAAQS, based on standards promulgated in 1997, 2006, and 2012. All areas in which the Company's generating units are located have been determined by the EPA to be in attainment with those standards.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

In 2010, the EPA revised the NAAQS for sulfur dioxide (SO2), establishing a new one-hour standard. No areas within the Company's service territory have been designated as nonattainment under this standard. However, in 2015, the EPA finalized a data requirements rule to support final EPA designation decisions for all remaining areas under the SO2 standard, which could result in nonattainment designations for areas within the Company's service territory. Nonattainment designations could require additional reductions in SO2 emissions and increased compliance and operational costs.
On July 6, 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR). CSAPR is an emissions trading program that limits SO2 and nitrogen oxide (NOx) emissions from power plants in two phases – Phase 1 in 2015 and Phase 2 in 2017. On October 26, 2016, the EPA published a final rule that updates the CSAPR ozone-season NOx program, beginning in 2017, and establishes more stringent ozone-season emissions budgets in Mississippi and removes Florida from the program. The State of Georgia's emission budget was not affected by the revisions, but interstate emissions trading is restricted unless the state decides to voluntarily adopt a significantly reduced budget. Georgia is also in the CSAPR annual SO2 and NOx programs.
The EPA finalized regional haze regulations in 2005, with a goal of restoring natural visibility conditions in certain areas (primarily national parks and wilderness areas) by 2064. The rule involves the application of best available retrofit technology to certain sources, including fossil fuel-fired generating facilities, built between 1962 and 1977 and any additional emissions reductions necessary for each designated area to achieve reasonable progress toward the natural visibility conditions goal by 2018 and for each 10-year period thereafter. On December 14, 2016, the EPA finalized revisions to the regional haze regulations. These regulations establish a deadline of July 31, 2021 for states to submit revised State Implementation Plans (SIP) to the EPA demonstrating reasonable progress toward the statutory goal of achieving natural background conditions by 2064. State implementation of the reasonable progress requirements defined in this final rule could require further reductions in SO2 or NOx emissions.
In June 2015, the EPA published a final rule requiring certain states (including Florida, Georgia, and Mississippi) to revise or remove the provisions of their SIPs relating to the regulation of excess emissions at industrial facilities, including fossil fuel-fired generating facilities, during periods of startup, shut-down, or malfunction (SSM), and proposed SIP revisions have been submitted by the affected states where the Company's generating units are located.
The Company has developed and continually updates a comprehensive environmental compliance strategy to assess compliance obligations associated with the current and proposed environmental requirements discussed above. These regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and results of operations, cash flows, and financial condition if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of the eight-hour ozone and SO2 NAAQS, CSAPR, regional haze regulations, and SSM rule will depend on various factors, such as implementation, adoption, or other action at the state level, and the outcome of pending and/or future legal challenges, and cannot be determined at this time.
Water Quality
The EPA's final rule establishing standards for reducing effects on fish and other aquatic life caused by new and existing cooling water intake structures at existing power plants and manufacturing facilities became effective in 2014. The effect of this final rule will depend on the results of additional studies that are currently underway and implementation of the rule by regulators based on site-specific factors. National Pollutant Discharge Elimination System (NPDES) permits issued after July 14, 2018 must include conditions to implement and ensure compliance with the standards and protective measures required by the rule.
In November 2015, the EPA published a final effluent guidelines rule which imposes stringent technology-based requirements for certain wastestreams from steam electric power plants. The revised technology-based limits and compliance dates will be incorporated into future renewals of NPDES permits at affected units and may require the installation and operation of multiple technologies sufficient to ensure compliance with applicable new numeric wastewater compliance limits. Compliance deadlines between November 1, 2018 and December 31, 2023 will be established in permits based on information provided for each applicable wastestream.
In 2015, the EPA and the U.S. Army Corps of Engineers jointly published a final rule revising the regulatory definition of waters of the U.S. for all Clean Water Act (CWA) programs. The final rule significantly expands the scope of federal jurisdiction under the CWA and could have significant impacts on economic development projects which could affect customer demand growth. In addition, this rule could significantly increase permitting and regulatory requirements and costs associated with the siting of new facilities and the installation, expansion, and maintenance of transmission and distribution lines. The rule became effective in August 2015 but, in October 2015, the U.S. Court of Appeals for the Sixth Circuit issued an order staying implementation of the final rule. The case is held in abeyance pending review by the U.S. Supreme Court of challenges to the U.S. Court of Appeals for the Sixth Circuit's jurisdiction in the case.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

In addition, numeric nutrient water quality standards promulgated by the State of Florida to limit the amount of nitrogen and phosphorous allowed in state waters are in effect for the State's streams and estuaries. The impact of these standards will depend on further regulatory action in connection with their site-specific implementation through the State of Florida's National Pollutant Discharge Elimination System permitting program and Total Maximum Daily Load restoration program and cannot be determined at this time.
These water quality regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. Also, results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of these final rules will depend on various factors, such as pending and/or future legal challenges, compliance dates, and implementation of the rules, and cannot be determined at this time.
Coal Combustion Residuals
The Company currently manages CCR at onsite storage units consisting of landfills and surface impoundments (CCR Units) at three electric generating plants in Florida and is a co-owner of units at generating plants located in Mississippi and Georgia operated by Mississippi Power and Georgia Power, respectively. In addition to on-site storage, the Company sells a portion of its CCR to third parties for beneficial reuse. Individual states regulate CCR and the States of Florida, Mississippi, and Georgia each have their own regulatory requirements. The Company has an inspection program in place to assist in maintaining the integrity of its coal ash surface impoundments.
The CCR Rule became effective in October 2015. The CCR Rule regulates the disposal of CCR, including coal ash and gypsum, as non-hazardous solid waste in CCR Units at active generating power plants. The CCR Rule does not automatically require closure of CCR Units but includes minimum criteria for active and inactive surface impoundments containing CCR and liquids, lateral expansions of existing units, and active landfills. Failure to meet the minimum criteria can result in the required closure of a CCR Unit. On December 16, 2016, President Obama signed the Water Infrastructure Improvements for the Nation Act (WIIN Act). The WIIN Act allows states to establish permit programs for implementing the CCR Rule, if the EPA approves the program, and allows for federal permits and EPA enforcement where a state permitting program does not exist.
Based on current cost estimates for closure and monitoring of ash ponds pursuant to the CCR Rule, and the closure of an ash pond at Plant Scholz, the Company has recorded AROs. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, the Company expects to continue to periodically update these estimates. The Company has posted closure and post-closure care plans to its public website as required by the CCR Rule; however, the ultimate impact of the CCR Rule will depend on the results of initial and ongoing minimum criteria assessments and the implementation of state or federal permit programs. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates. The estimated costs associated with closure of the ash ponds at Plant Scholz and Plant Smith for 2017 have been approved for recovery through the environmental cost recovery clause. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information regarding the Company's AROs as of December 31, 2016.
Environmental Remediation
The Company must comply with other environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Company could incur substantial costs to clean up affected sites. The Company conducts studies to determine the extent of any required cleanup and has recognized in its financial statements the costs to clean up known affected sites. Included in this amount are costs associated with remediation of the Company's substation sites. These projects have been approved by the Florida PSC for recovery through the environmental cost recovery clause; therefore, these liabilities have no impact to the Company's net income. The Company may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental Matters – Environmental Remediation" for additional information.
Global Climate Issues
In October 2015, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing CO2 emissions from new, modified, and reconstructed units. The other final action, known as the Clean Power Plan, establishes guidelines for states to develop plans to meet EPA-mandated CO2 emission rates or emission reduction goals for existing units. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022 and 2029 and final rates in 2030 and thereafter. At the same time, the EPA published a proposed federal plan and model rule that, when finalized, states can adopt or that would be put in place if a state

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

either does not submit a state plan or its plan is not approved by the EPA. On February 9, 2016, the U.S. Supreme Court granted a stay of the Clean Power Plan, pending disposition of petitions for review with the courts. The stay will remain in effect through the resolution of the litigation, including any review by the U.S. Supreme Court.
These guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates or through PPAs. However, the ultimate financial and operational impact of the final rules on the Company cannot be determined at this time and will depend upon numerous factors, including the outcome of pending legal challenges, including legal challenges filed by the traditional electric operating companies, and any individual state implementation of the EPA's final guidelines in the event the rule is upheld and implemented.
In December 2015, parties to the United Nations Framework Convention on Climate Change – including the United States – adopted the Paris Agreement, which establishes a non-binding universal framework for addressing greenhouse gas emissions based on nationally determined contributions. It also sets in place a process for tracking progress toward the goals every five years. The ultimate impact of this agreement depends on its implementation by participating countries and cannot be determined at this time.
The EPA's greenhouse gas reporting rule requires annual reporting of greenhouse gas emissions expressed in terms of metric tons of CO2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, the Company's 2015 greenhouse gas emissions were approximately 9 million metric tons of CO2 equivalent. The preliminary estimate of the Company's 2016 greenhouse gas emissions on the same basis is approximately 8 million metric tons of CO2 equivalent. The level of greenhouse gas emissions from year to year will depend on the level of generation, the mix of fuel sources, and other factors.
FERC Matters
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company) and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Retail Regulatory Matters
The Company's rates and charges for service to retail customers are subject to the regulatory oversight of the Florida PSC. The Company's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased energy costs, purchased power capacity costs, energy conservation and demand side management programs, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are recovered through the Company's base rates. See Note 3 to the financial statements under "Retail Regulatory Matters" for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

Retail Base Rate Cases
In 2013, the Florida PSC approved the 2013 Rate Case Settlement Agreement among the Company and all of the intervenors to the Company's retail base rate case. Under the terms of the 2013 Rate Case Settlement Agreement, the Company (1) increased base rates approximately $35 million and $20 million annually effective January 2014 and 2015, respectively; (2) continued its authorized retail ROE midpoint (10.25%) and range (9.25% – 11.25%); (3) may reduce depreciation expense and record a regulatory asset that will be included as an offset to the other cost of removal regulatory liability in an aggregate amount up to $62.5 million between January 2014 and June 2017, of which $28.5 million had been recorded as of December 31, 2016; and (4) accrued a return similar to AFUDC on certain transmission system upgrades placed into service after January 2014 through January 1, 2017.
The 2013 Rate Case Settlement Agreement also provides that the Company may reduce depreciation and record a regulatory asset that will be included as an offset to the other cost of removal regulatory liability in an aggregate amount up to $62.5 million from January 2014 through June 2017. In any given month, such depreciation reduction may not exceed the amount necessary for the retail ROE, as reported to the Florida PSC monthly, to reach the midpoint of the authorized retail ROE range then in effect. Recovery of the regulatory asset will occur over a period to be determined by the Florida PSC in the Company's 2016 Rate Case. For 2014 and 2015, the Company recognized reductions in depreciation expense of $8.4 million and $20.1 million, respectively. No net reduction in depreciation was recorded in 2016.
On October 12, 2016, the Company filed the 2016 Rate Case with the Florida PSC requesting an annual increase in retail rates and charges of $106.8 million based on the projected test year of January 1, 2017 through December 31, 2017 and a retail ROE of 11% compared to the current retail ROE of 10.25%. The requested increase includes recovery of the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers following the contract expirations discussed previously. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, the Company may consider an asset sale. The current book value of the Company's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. The Florida PSC is expected to make a decision on the 2016 Rate Case in the second quarter 2017. The Company has requested that the increase in base rates, if approved by the Florida PSC, become effective in July 2017. The ultimate outcome of this matter cannot be determined at this time.
See Note 3 to the financial statements under "Retail Regulatory Matters – Retail Base Rate Cases" for additional information.
Cost Recovery Clauses
On November 2, 2016, the Florida PSC approved the Company's 2017 annual cost recovery clause rates for its fuel, purchased power capacity, environmental, and energy conservation cost recovery clauses. The net effect of the approved changes is a decrease of approximately $41 million in annual revenues effective in January 2017. In general, the decreased revenues will not have a significant impact on net income since most of the revenues will be offset by lower expenses. However, certain costs associated with the ongoing ownership and operation of Plant Scherer Unit 3 were included in the environmental cost recovery clause rate, which increased annual revenues by approximately $12 million in 2016 and is expected to increase revenues by an incremental $2 million for a total of approximately $14 million in 2017. The final disposition of these costs, and the related impact on rates, is subject to the Florida PSC's ultimate ruling on whether costs associated with Plant Scherer Unit 3 are recoverable from retail customers, which is expected to be decided in the 2016 Rate Case as discussed previously. The ultimate outcome of this matter cannot be determined at this time. See Note 3 to the financial statements under "Retail Regulatory Matters – Retail Base Rate Cases" for additional information.
Revenues for all cost recovery clauses, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor for fuel and purchased power will have no significant effect on the Company's revenues or net income, but will affect annual cash flow. The recovery provisions for environmental compliance and energy conservation include related expenses and a return on net average investment. See Note 1 to the financial statements under "Revenues" for additional information.
Renewables
In April 2015, the Florida PSC approved three energy purchase agreements totaling 120 MWs of utility-scale solar generation located at three military installations in northwest Florida. Purchases under these solar agreements are expected to begin by the summer of 2017.
The Florida PSC issued a final approval order on the Company's Community Solar Pilot Program on April 15, 2016. The program will offer the Company's customers an opportunity to voluntarily contribute to the construction and operation of a solar photovoltaic facility with electric generating capacity of up to 1 MW through annual subscriptions. The energy generated from the solar facility is expected to provide power to all of the Company's customers.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

On November 29, 2016, the Florida PSC approved an energy purchase agreement for up to 94 MWs of additional wind generation in central Oklahoma. Purchases under this agreement will be for energy only and will be recovered through the Company's fuel cost recovery clause.
Income Tax Matters
Bonus Depreciation
In December 2015,Under the Protecting Americans from Tax Hikes (PATH) Act was signed into law. Bonus depreciation was extended for qualified propertyReform Legislation, projects with binding contracts prior to September 28, 2017 and placed in service through 2020. The PATH Act allowsafter September 27, 2017 remain eligible for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension ofBased on provisional estimates, bonus depreciation included in the PATH Act is expected to result in approximately $20 million of positive cash flows for the 2016 tax year and approximately $26 million for the 2017 tax year. Registrants as follows:
 2019 Tax Year 2020 Tax Year
 (in millions)
Southern Company$989
 $382
Alabama Power180
 68
Georgia Power314
 56
Mississippi Power7
 2
Southern Power(*)
87
 95
Southern Company Gas190
 58
(*)Cash flows resulting from bonus depreciation for Southern Power would also be impacted by Southern Power's use of tax equity partnerships.
See Note 510 to the financial statements under "Current and Deferred Income Taxes" for additional information.
Other Matters
As a result of the cost to comply with environmental regulations imposed by the EPA, the Company retired its coal-fired generation at Plant Smith Units 1 and 2 (357 MWs) on March 31, 2016. The Company filed a petition with the Florida PSC requesting permission to recover the remaining net book value of Plant Smith Units 1 and 2 and the remaining materials and supplies associated with these units as of the retirement date. On August 29, 2016, the Florida PSC approved the Company's request to reclassify these costs, totaling approximately $63 million, to a regulatory asset for recovery over a period to be decided in the 2016 Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Tax Credits
The Tax Reform Legislation retained solar energy incentives of 30% ITC for projects that commenced construction by December 31, 2019; 26% ITC for projects that commence construction in 2020; 22% ITC for projects that commence construction in 2021; and a permanent 10% ITC for projects that commence construction on or after January 1, 2022. In addition, the Tax Reform Legislation retained wind energy incentives of 100% PTC for projects that commenced construction in 2016; 80% PTC for projects that commenced construction in 2017; 60% PTC for projects that commenced construction in 2018; and 40% PTC for projects that commenced construction in 2019. As a result of a tax extenders bill passed in December 2019, projects that begin construction in 2020 will be entitled to 60% PTC. Projects commencing construction after 2020 will not be entitled to any PTCs. Southern Company ishas received ITCs and PTCs in connection with investments in solar, wind, and biomass facilities primarily at Southern Power and Georgia Power.
Southern Power's ITCs relate to its investment in new solar facilities acquired or constructed and its PTCs relate to the first 10 years of energy production from its wind facilities, which have had, and may continue to have, a material impact on Southern Power's cash flows and net income. At December 31, 2019, Southern Company and Southern Power had approximately $1.8 billion and $1.4 billion, respectively, of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2024, but could be further delayed. Since 2018, Southern Power has been utilizing tax equity partnerships for wind and solar projects, where the tax partner takes significantly all of the respective federal tax benefits. These tax equity partnerships are consolidated in Southern Company's and Southern Power's financial statements using the HLBV methodology to allocate partnership gains and losses. See Note 1 to the financial statements under "General" for additional information on the HLBV methodology and Note 1 to the financial statements under "Income Taxes" and Note 10 to the financial statements under "Deferred Tax Assets and LiabilitiesTax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax benefit related to associated basis differences.
General Litigation Matters
The Registrants are involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, the Company is subject to certain claims and legal actions arising in the ordinary course of business. The Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements, such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation or regulatory matters against the Companyeach Registrant and any subsidiaries cannot be predicteddetermined at this time; however, for current proceedings not specifically reported herein or in NoteNotes 2 and 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company'ssuch Registrant's financial statements. See NoteNotes 2 and 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
The Registrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action.
In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on two agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and three members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included four additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 to the financial statements under "Kemper County Energy Facility" for additional information.
Other Matters
Southern Company
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in circumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the lessees, and the timing of expected tax cash flows. See Note 1 to the financial statements under "Leveraged Leases" for additional information.
The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of one of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Mississippi Power
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 to the financial statements under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of two salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not return to service by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has two other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million at December 31, 2019.
The ultimate outcome of these matters cannot be determined at this time, but could have a material impact on the financial statements of Southern Company and Southern Company Gas.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Company prepares itsRegistrants prepare their financial statements in accordance with GAAP. Significant accounting policies are described in Note 1the notes to the financial statements. In the application of these policies, certain estimates are made that may have a material impact

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

on the Company's results of operations and related disclosures.disclosures of the applicable Registrants (as indicated in the section descriptions herein). Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The Company istraditional electric operating companies and the natural gas distribution utilities are subject to retail regulation by their respective state PSCs or other applicable state regulatory agencies and wholesale regulation by the Florida PSC. The Florida PSC setsFERC. These regulatory agencies set the rates the Company istraditional electric operating companies and the natural gas distribution utilities are permitted to charge customers based on allowable costs. The Company is also subject to cost-based regulation by the FERC with respect to wholesale transmission rates.costs, including a reasonable ROE. As a result, the Company appliestraditional electric operating companies and the natural gas distribution utilities apply accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on the Company'sfor rate regulated entities also impacts their financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the Company;traditional electric operating companies and the natural gas distribution utilities; therefore, the accounting estimates inherent in specific costs such as depreciation, AROs, and pension and other postretirement benefits have less of a direct impact on the Company's results of operations and financial condition of the applicable Registrants than they would on a non-regulated company.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulftotal operating revenues in 2019 for the applicable Registrants were as follows: 87% for Southern Company, 99% for Alabama Power, 97% for Georgia Power, 100% for Mississippi Power, and 80% for Southern Company 2016 Annual Report

Gas.
As reflected in Note 12 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the financial statements of the applicable Registrants.
Estimated Cost, Schedule, and Rate Recovery for the Construction of Plant Vogtle Units 3 and 4
(Southern Company and Georgia Power)
In 2016, the Georgia PSC approved the Vogtle Cost Settlement Agreement, which resolved certain prudency matters in connection with Georgia Power's fifteenth VCM report. In 2017, the Georgia PSC approved Georgia Power's seventeenth VCM report, which included a recommendation to continue construction of Plant Vogtle Units 3 and 4, with Southern Nuclear serving as project manager and Bechtel serving as the primary construction contractor, as well as a modification of the Vogtle Cost Settlement Agreement. The Georgia PSC's related order stated that under the modified Vogtle Cost Settlement Agreement, (i) none of the $3.3 billion of costs incurred through December 31, 2015 should be disallowed as imprudent; (ii) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs; (iii) Georgia Power would have the burden of proof to show that any capital costs above $5.68 billion were prudent; (iv) Georgia Power's total project capital cost forecast of $7.3 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds) was found reasonable and did not represent a cost cap; and (v) prudence decisions would be made subsequent to achieving fuel load for Unit 4.
In its order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In the second quarter 2018, Georgia Power revised its base cost forecast and estimated contingency to complete construction and start-up of Plant Vogtle Units 3 and 4 to $8.0 billion and $0.4 billion, respectively, for a total project capital cost forecast of $8.4 billion (net of $1.7 billion received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). Although Georgia Power believes these incremental costs are reasonable and necessary to complete the project and the Georgia PSC's order in the seventeenth VCM proceeding specifically states that the construction of Plant Vogtle Units 3 and 4 is not subject to a cost cap, Georgia Power did not seek rate recovery for the $0.7 billion increase in costs included in the base capital cost forecast in the nineteenth VCM report. After considering the significant level of uncertainty that exists regarding the future recoverability of costs included in the construction contingency estimate since the ultimate outcome of these matters is subject to the outcome of future assessments by management, as well as Georgia PSC decisions in these future regulatory

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

proceedings, Georgia Power recorded a total pre-tax charge to income of $1.1 billion ($0.8 billion after tax) in the second quarter 2018.
Georgia Power's revised cost estimate reflects an expected in-service date of November 2021 for Unit 3 and November 2022 for Unit 4.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However, Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Given the significant complexity involved in estimating the future costs to complete construction and start-up of Plant Vogtle Units 3 and 4 and the significant management judgment necessary to assess the related uncertainties surrounding future rate recovery of any projected cost increases, as well as the potential impact on results of operations and cash flows, Southern Company and Georgia Power consider these items to be critical accounting estimates. See Note 2 to the financial statements under "Georgia PowerNuclear Construction" for additional information.
Accounting for Income Taxes (Southern Company, Mississippi Power, Southern Power, and Southern Company Gas)
The consolidated income tax provision and deferred income tax assets and liabilities, as well as any unrecognized tax benefits and valuation allowances, require significant judgment and estimates. These estimates are supported by historical tax return data, reasonable projections of taxable income, and interpretations of applicable tax laws and regulations across multiple taxing jurisdictions. The effective tax rate reflects the statutory tax rates and calculated apportionments for the various states in which the Southern Company system operates.
On behalf of its subsidiaries, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. Certain deductions and credits can be limited or utilized at the consolidated or combined level resulting in NOL and tax credit carryforwards that would not otherwise result on a stand-alone basis. Utilization of NOL and tax credit carryforwards and the assessment of valuation allowances are based on significant judgment and extensive analysis of Southern Company's and its subsidiaries' current financial statements.position and results of operations, including currently available information about future years, to estimate when future taxable income will be realized.
Current and deferred state income tax liabilities and assets are estimated based on laws of multiple states that determine the income to be apportioned to their jurisdictions. States utilize various formulas to calculate the apportionment of taxable income, primarily using sales, assets, or payroll within the jurisdiction compared to the consolidated totals. In addition, each state varies as to whether a stand-alone, combined, or unitary filing methodology is required. The calculation of deferred state taxes considers apportionment factors and filing methodologies that are expected to apply in future years. The apportionments and methodologies which are ultimately finalized in a manner inconsistent with expectations could have a material effect on the financial statements of the applicable Registrants.
Given the significant judgment involved in estimating NOL and tax credit carryforwards and multi-state apportionments for all subsidiaries, the applicable Registrants consider deferred income tax liabilities and assets to be critical accounting estimates.
Asset Retirement Obligations (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
AROs are computed as the fairpresent value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liabilityARO liabilities for AROsthe traditional electric operating companies primarily relatesrelate to the Company's facilities that are subject to the CCR Rule and to the closure of anrelated state rules, principally ash pond at Plant Scholz.ponds. In addition, the Company hasAlabama Power and Georgia Power have retirement obligations related to combustion turbines at its Pea Ridge facility,the decommissioning of nuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2). The traditional electric operating companies also have AROs related to various landfill sites, a barge unloading dock, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers. transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and for Mississippi Power, mine reclamation and water wells.
The traditional electric operating companies and Southern Company Gas also hashave identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and certain structures authorized byproperty associated with the U.S. Army Corps of Engineers.Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

assets have not been recorded because the settlement timing for thecertain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROsretirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
The Company recorded newcost estimates for AROs in 2015 for facilities that are subjectrelated to the CCR Rule as discussed above and for the closuredisposal of an ash pond at Plant Scholz. The cost estimatesCCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure for those facilities impacted byand the CCR Rule. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying therelated state rules. The traditional electric operating companies expect to update their ARO cost estimates suchperiodically as additional information related to these assumptions becomes available. See Note 6 to the quantities of CCR at each site, and the determination of timing with respectfinancial statements for additional information, including increases to compliance activities, including the potential for closingAROs related to ash ponds prior to the end of their currently anticipated useful life, the Company expects to continue to periodically update these estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Coal Combustion Residuals" herein for additional information.recorded during 2019 by certain Registrants.
Given the significant judgment involved in estimating AROs, the Company considersapplicable Registrants consider the liabilities for AROs to be critical accounting estimates.
See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
Pension and Other Postretirement Benefits (Southern Company, Alabama Power, Georgia Power, Mississippi Power, and Southern Company Gas)
The Company's calculationapplicable Registrants' calculations of pension and other postretirement benefits expense isare dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term rate of return (LRR) on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the Company believes thatapplicable Registrants believe the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect itstheir pension and other postretirement benefitsbenefit costs and obligations.
Key elements in determining the Company'sapplicable Registrants' pension and other postretirement benefit expense are the expected long-term return on plan assetsLRR and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on the Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. The Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to the Company's target asset allocation. For purposes of determining its liabilitythe applicable Registrants' liabilities related to the pension and other postretirement benefit plans, theSouthern Company discounts the future related cash flows using a single-point discount rate for each plan developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. For 2015The discount rate assumption impacts both the service cost and prior years,non-service costs components of net periodic benefit costs as well as the Company computed the interest cost component of its net periodicprojected benefit obligations.
The LRR on pension and other postretirement benefit plan assets is based on Southern Company's investment strategy, historical experience, and expectations that consider external actuarial advice, and represents the average rate of earnings expected over the long term on the assets invested to provide for anticipated future benefit payments. Southern Company determines the amount of the expected return on plan assets component of non-service costs by applying the LRR of various asset classes to Southern Company's target asset allocation. The LRR only impacts the non-service costs component of net periodic benefit costs for the following year and is set annually at the beginning of the year.
For 2019, the LRR assumption for qualified pension plan assets was reduced from 7.95% to 7.75% for purposes of determining net periodic pension expense usingas a result of changes in the same single-point discount rate. For 2016,economic outlook used in estimating the expected returns as of December 31, 2018. As a result of the decrease in the LRR, the non-service costs component of net periodic pension expense increased by $24 million for the Southern Company adoptedsystem in 2019. See the table below for the impact on each Registrant.


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


For 2020, net periodic pension expense will be impacted by two factors: a full yield curvechange in the approach for calculatingused to determine the interest cost component whereby the discount rate for each year is appliedLRR assumption and cash contributions totaling $1.1 billion to the liabilityqualified pension plan made in December 2019. Historically, Southern Company has set the LRR assumption using asset return modeling based on geometric returns that reflect the compound average returns for that specificdependent annual periods. Beginning in 2020, Southern Company will set the LRR assumption using an arithmetic mean which represents the expected simple average return to be earned by the pension plan assets over any one year. AsSouthern Company believes the use of the arithmetic mean is more compatible with the LRR's function of estimating a result,single year's investment return. Excluding the interest costadditional pension contribution in December 2019, the change in the LRR assumption will reduce the non-service costs component of net periodic pension expense by $78 million for the Southern Company system in 2020. See the table below for the impact on each Registrant. The contributions in 2019 will further reduce expense by $88 million for the Southern Company system in 2020.
 Southern Company
Alabama
Power
Georgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Increase (decrease) in pension expense:   
2019$24
$5
$8
$1
$2
2020(78)(18)(25)(4)(7)
The following table illustrates the sensitivity to changes in the applicable Registrants' long-term assumptions with respect to the discount rate, salary increases, and other postretirement benefit plan expense decreased by approximately $4 million in 2016.
A 25 basis point change in any significant assumption (discountthe long-term rate salaries, or long-termof return on plan assets) would result in a $2 million or less change in total annual benefit expense and a $21 million or less change in projected obligations.assets:
Increase/(Decrease) in
25 Basis Point Change in:Total Benefit Expense for 2020Projected Obligation for Pension Plan at December 31, 2019
Projected Obligation for
Other Postretirement
Benefit Plans at December 31, 2019
(in millions)
Discount rate:
Southern Company$41/$(39)$549/$(518)$57/$(54)
Alabama Power$10/$(10)$131/$(123)$14/$(13)
Georgia Power$12/$(11)$166/$(156)$21/$(20)
Mississippi Power$2/$(2)$25/$(23)$2/$(2)
Southern Company Gas$1/$(1)$38/$(36)$6/$(6)
Salaries:
Southern Company$23/$(22)$118/$(113)$–/$–
Alabama Power$6/$(6)$33/$(32)$–/$–
Georgia Power$6/$(6)$34/$(33)$–/$–
Mississippi Power$1/$(1)$5/$(5)$–/$–
Southern Company Gas$1/$(1)$3/$(3)$–/$–
Long-term return on plan assets:
Southern Company$35/$(35)N/AN/A
Alabama Power$9/$(9)N/AN/A
Georgia Power$11/$(11)N/AN/A
Mississippi Power$2/$(2)N/AN/A
Southern Company Gas$3/$(3)N/AN/A
See Note 211 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Asset Impairment (Southern Company, Southern Power, and Southern Company Gas)
Goodwill (Southern Company and Southern Company Gas)
The acquisition method of accounting requires the assets acquired and liabilities assumed to be recorded at the date of acquisition at their respective estimated fair values. The applicable Registrants have recognized goodwill as of the date of their acquisitions, as a residual over the fair values of the identifiable net assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the fourth quarter of the year as well as on an interim basis as events and changes in circumstances occur, including, but not limited to, a significant change in operating performance, the business climate, legal or regulatory factors, or a planned sale or disposition of a significant portion of the business. A reporting unit is the operating segment, or a business one level below the operating segment (a component), if discrete financial information is prepared and regularly reviewed by management. Components are aggregated if they have similar economic characteristics.
As part of the impairment tests, the applicable Registrant may perform an initial qualitative assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount before applying the quantitative goodwill impairment test. If the applicable Registrant elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If the applicable Registrant determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it compares the fair value of the reporting unit to its carrying value to determine if the fair value is greater than its carrying value.
Goodwill for Southern Company and Southern Company Gas was $5.3 billion and $5.0 billion, respectively, at December 31, 2019. For its 2019 and 2018 annual impairment tests, Southern Company Gas performed the qualitative assessment and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For its 2017 annual impairment test, Southern Company Gas performed the quantitative assessment, which resulted in the fair value of all of its reporting units that have goodwill exceeding their carrying value. For its annual impairment tests for PowerSecure, Southern Company performed the quantitative assessment, which resulted in the fair value of goodwill at PowerSecure exceeding its carrying value in all years presented. However, Southern Company recorded goodwill impairment charges totaling $34 million in 2019 as a result of its decision to sell certain PowerSecure business units. See Note 15 to the financial statements under "Southern Company" for additional information.
The judgments made in determining the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can significantly impact the applicable Registrant's results of operations. Fair values and useful lives are determined based on, among other factors, the expected future period of benefit of the asset, the various characteristics of the asset, and projected cash flows. As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 1 to the financial statements under "Goodwill and Other Intangible Assets and Liabilities" for additional information regarding the applicable Registrants' goodwill.
Long-Lived Assets (Southern Company, Southern Power, and Southern Company Gas)
Impairments of long-lived assets of the traditional electric utilities and natural gas distribution utilities are generally related to specific regulatory disallowances. The applicable Registrants assess their other long-lived assets for impairment whenever events or changes in circumstances indicate that an asset's carrying amount may not be recoverable. If an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of the undiscounted expected future cash flows directly attributable to the asset's use and eventual disposition. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determined and a loss is recorded equal to the difference between the carrying value and the fair value of the asset. In addition, when assets are identified as held for sale, an impairment loss is recognized to the extent the carrying value of the assets or asset group exceeds their fair value less cost to sell. A high degree of judgment is required in developing estimates related to these evaluations, which are based on projections of various factors, some of which have been quite volatile in recent years.
Southern Power's investments in long-lived assets are primarily generation assets, whether in service or under construction. Excluding the natural gas distribution utilities, Southern Company Gas' investments in long-lived assets are primarily natural gas transportation and storage facility assets, whether in service or under construction. In addition, exclusive of the traditional electric operating companies and natural gas distribution utilities, Southern Company's investments in long-lived assets also include investments in leveraged leases.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

For Southern Power, examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to remarket generating capacity for an extended period, the unplanned termination of a customer contract or the inability of a customer to perform under the terms of the contract, or the inability to deploy wind turbine equipment to a development project. For Southern Company Gas, examples of impairment indicators could include, but are not limited to, significant changes in the U.S. natural gas storage market, construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, the inability to renew or extend customer contracts or the inability of a customer to perform under the terms of the contract, attrition rates, or the inability to deploy a development project. For Southern Company's investments in leveraged leases, impairment indicators include changes in estimates of future rental payments to be received under the lease as well as the residual value of the leased asset at the end of the lease.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the applicable Registrants consider these estimates to be critical accounting estimates.
See Note 3 to the financial statements under "Other Matters" and Note 15 to the financial statements for information on certain assets recently evaluated for impairment.
Derivatives and Hedging Activities (Southern Company and Southern Company Gas)
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in the applicable Registrant's assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value of derivative instruments may change significantly from period to period depending upon market conditions, and changes in hedge effectiveness may impact the accounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. If the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempt from fair value accounting treatment and is, instead, subject to traditional accrual accounting. The applicable Registrant utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are deferred in OCI on the balance sheets until the hedged transaction affects earnings in the case of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as document and assess the effectiveness of derivatives associated with transactions that receive hedge accounting treatment.
Southern Company Gas uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and, to a lesser extent, Southern Company Gas hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that Southern Company Gas would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
Derivative assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of nonperformance risk on liabilities.
A significant change in the underlying market prices or pricing assumptions used in pricing derivative assets or liabilities may result in a significant financial statement impact.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Given the assumptions used in pricing the derivative asset or liability, Southern Company and Southern Company Gas consider the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Note 14 to the financial statements for more information.
Revenue Recognition (Southern Power)
Southern Power's power sale transactions, which include PPAs, are classified in one of four general categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges, as described further below. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 14 to the financial statements. Southern Power's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
Southern Power considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;
Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the counterparty substantially all of the economic benefits and the right to direct the use of the asset.
If the contract meets the above criteria for a lease, Southern Power performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of Southern Power's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in Southern Power's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered. See Note 9 to the financial statements for additional information.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, Southern Power further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within Southern Power's available generating capacity) are accounted for as executory contracts. For contracts that have a capacity charge, the revenue is generally recognized in the period that it becomes billable. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. See Note 4 to the financial statements for additional information.
Cash Flow Hedge Transactions
Southern Power further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and
Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Derivative (Non-Hedge) Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Acquisition Accounting (Southern Power)
Southern Power may acquire generation assets as part of its overall growth strategy. At the time of an acquisition, Southern Power will assess if these assets and activities meet the definition of a business. For acquisitions that meet the definition of a business, the purchase price, including any contingent consideration, is allocated based on the fair value of the identifiable assets acquired and liabilities assumed (including any intangible assets, primarily related to acquired PPAs). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisition. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired.
Determining the fair value of assets acquired and liabilities assumed requires management judgment and Southern Power may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions, and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by Southern Power for potential or successful acquisitions are expensed as incurred.
Contingent consideration primarily relates to fixed amounts due to the seller once the facility is placed in service. For contingent consideration with variable payments, Southern Power fair values the arrangement with any changes recorded in the consolidated statements of income. See Note 13 to the financial statements for additional fair value information and Note 15 to the financial statements for additional information on recent acquisitions.
Variable Interest Entities (Southern Power)
Southern Power enters into partnerships with varying ownership structures. Upon entering into such arrangements, membership interests and other variable interests are evaluated to determine if the legal entity is a VIE. If the legal entity is a VIE, Southern Power will assess if it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE, making it the primary beneficiary. Making this determination may require significant management judgment.
If Southern Power is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. If Southern Power is not the primary beneficiary, the legal entity is generally accounted for under the equity method of accounting. Southern Power reconsiders its conclusions as to whether the legal entity is a VIE and whether it is the primary beneficiary for events that impact the rights of variable interests, such as ownership changes in membership interests.
Southern Power has partial ownership in certain legal entities for which the contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits are not based on fixed ownership percentages. For these arrangements, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period.
Contingent Obligations (All Registrants)
The Registrants are subject to a number of federal and state laws and regulations, as well as other factors and conditions that subject itthem to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and NoteNotes 2 and 3 to the financial statements for more information regarding certain of these contingencies. The CompanyRegistrants periodically evaluates itsevaluate their exposure to such risks and recordsrecord reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect the Company's results of operations, cash flows, or financial condition.condition of the Registrants.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalentSee Note 1 to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognitionfinancial statements under "Recently Adopted Accounting Standards" for such sales.additional information.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02unchanged and there is effectiveno change to the accounting for fiscal years beginning after December 15, 2018, with early adoption permitted.existing leveraged leases. The Company is currently evaluatingRegistrants adopted the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies relatedJanuary 1, 2019. See Note 9 to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefitsfinancial statements for additional information and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activitiesdisclosures.


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report

rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Notes 5, 8, and 11 to the financial statements for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
FINANCIAL CONDITION AND LIQUIDITY
Overview
The Company's financial condition of each Registrant remained stable at December 31, 2016.2019. The Company'sRegistrants' cash requirements primarily consist of funding ongoing operations, including unconsolidated subsidiaries, as well as common stock dividends, capital expenditures, and debt maturities. Southern Power's cash requirements also include distributions to noncontrolling interests. Capital expenditures and other investing activities for the traditional electric operating companies include investments to meet projected long-term demand requirements, including to build new generation facilities, to maintain existing generation facilities, to comply with environmental regulations including adding environmental modifications to certain existing generating units and closures of ash ponds, to expand and improve transmission and distribution facilities, and for restoration following major storms. Southern Power's capital expenditures and other investing activities may include acquisitions or new construction associated with its overall growth strategy and to maintain its existing generation fleet's performance. Southern Company Gas' capital expenditures and other investing activities include investments to meet projected long-term demand requirements, to maintain existing facilities,natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations including adding environmental modifications to certain existing generating units, to expand and improve transmission and distribution facilities, and for restoration following major storms. regulations.
Operating cash flows provide a substantial portion of the Company'sRegistrants' cash needs. During 2019, Southern Power utilized tax credits, which provided $734 million in operating cash flows. For the three-year period from 20172020 through 2019, the Company's2022, each Registrant's projected common stock dividends, capital expenditures, and debt maturities, as well as distributions to noncontrolling interests for Southern Power, are expected to exceed its operating cash flows. TheSouthern Company plans to finance future cash needs in excess of its operating cash flows primarily throughby accessing borrowings from financial institutions and issuing debt issuancesand hybrid securities in the capital markets,markets. Each Subsidiary Registrant plans to finance its future cash needs in excess of its operating cash flows primarily through external securities issuances, borrowings from financial institutions, and equity contributions from Southern Company. In addition, Georgia Power plans to utilize borrowings through the FFB and Southern Power plans to utilize tax equity partnership contributions. The Company intendsRegistrants plan to use commercial paper to manage seasonal variations in operating cash flows and for other working capital needs and continue to monitor itstheir access to short-term and long-term capital markets as well as their bank credit agreementsarrangements to meet future capital and liquidity needs. See "Sources"Sources of Capital," "Financing"Financing Activities," "Capital Requirements," and "Capital Requirements and "Contractual Obligations"Obligations" herein for additional information.
The Company'sRegistrants' investments in thetheir qualified pension planplans and Alabama Power's and Georgia Power's investments in their nuclear decommissioning trust funds increased in value as ofat December 31, 20162019 as compared to December 31, 2015. On2018. In December 19, 2016,2019, the CompanyRegistrants voluntarily contributed $48 millionthe following amounts to the qualified pension plan. plan:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Contributions to qualified pension plan$1,136
$362
$200
$54
$24
$145
No mandatory contributions to the qualified pension planplans are anticipated during 2017.2020. See Note 2"Contractual Obligations" herein and Notes 6 and 11 to the financial statements under "Pension Plans""Nuclear Decommissioning" and "Pension Plans," respectively, for additional information.
At the end of 2019, the market price of Southern Company's common stock was $63.70 per share (based on the closing price as reported on the NYSE) and the book value was $26.11 per share, representing a market-to-book value ratio of 244%, compared to $43.92, $23.91, and 184%, respectively, at the end of 2018.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Analysis of Cash Flows
Net cash flows provided from (used for) operating, investing, and financing activities totaled $379 million in 2016, a decrease of $81 million from 2015, primarily due to decreases2019 and 2018 are presented in the following table:
Net cash provided from (used for):Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Operating activities$5,781
$1,779
$2,907
$339
$1,385
$1,067
Investing activities(3,392)(1,963)(3,885)(263)(167)(1,386)
Financing activities(1,930)765
918
(83)(1,120)298
       
2018      
Operating activities$6,945
$1,881
$2,769
$804
$631
$764
Investing activities(5,760)(2,289)(3,109)(232)(227)998
Financing activities(1,813)177
(400)(527)(363)(1,770)
Fluctuations in cash flows related to clause recovery and a voluntary contribution to the qualified pension plan, partially offset by the timing of fossil fuel stock purchases. Net cash provided from operating activities totaled $460 million in 2015, an increase of $116 million from 2014, primarily due to increases in cash flows related to clause recovery and bonus depreciation. This increase was partially offset by decreases related to the timing of fossil fuel stock purchases and vendor payments.
Net cash used for investing activities totaled $180 million, $281 million, and $358 million for 2016, 2015, and 2014, respectively. The changes in cash used for investing activities were primarily related to gross property additions for environmental, distribution, steam generation, and transmission assets. Funds for the Company's property additions were provided by operating activities, capital contributions, and other financing activities.
Net cash used for financing activities totaled $217 million in 2016 primarily due to the redemptions of long-term debt and the payment of common stock dividends, partially offset by an increase in notes payable. Net cash used for financing activities totaled $144 million in 2015 primarily due to the payment of common stock dividends and redemptions of long-term debt, partially offset by an increase in notes payable and proceeds from the issuance of common stock to Southern Company. Net cash provided from financing activities totaled $31 million in 2014 primarily due to the issuance of long-term debt and common stock to Southern Company, partially offset by the payment of common stock dividends, the redemption of long-term debt, and a decrease to notes payable. Fluctuations in cash flow from financing activities vary from year to year based on capital needs and the maturity or redemption of securities.
Southern Company
Net cash provided from operating activities decreased $1.2 billion in 2019 as compared to 2018 primarily due to the voluntary contribution to the qualified pension plan and the timing of vendor payments.
The net cash used for investing activities in 2019 and 2018 was primarily due to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, and capital expenditures for Southern Company Gas' infrastructure replacement programs, partially offset by proceeds from the sale transactions described in Note 15 to the financial statements, which totaled $5.1 billion and $3.0 billion in 2019 and 2018, respectively.
The net cash used for financing activities in 2019 was primarily due to common stock dividend payments and net repayments of short-term bank debt and commercial paper, partially offset by net issuances of long-term debt and the issuance of common stock. The net cash used for financing activities in 2018 was primarily due to net redemptions and repurchases of long-term debt, common stock dividend payments, and a decrease in commercial paper borrowings, partially offset by net issuances of short-term bank debt, proceeds from Southern Power's sales of non-controlling equity interests in entities indirectly owning substantially all of its solar facilities and eight of its wind facilities, and the issuance of common stock.
Alabama Power
Net cash provided from operating activities decreased $102 million in 2019 as compared to 2018primarily due to the voluntary contribution to the qualified pension plan, partially offset by the impacts of customer bill credits issued in 2018 related to the Tax Reform Legislation and increased fuel cost recovery.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and a long-term debt issuance, partially offset by payments of common stock dividends and a maturity of long-term debt. The net cash provided from financing activities in 2018 was primarily due to issuances of long-term debt and additional capital contributions from Southern Company, partially offset by the payment of common stock dividends and a maturity of long-term debt.
Georgia Power
Net cash provided from operating activities increased $138 million in 2019 as compared to 2018 primarily due to lower customer refunds and increased fuel cost recovery, partially offset by the voluntary contribution to the qualified pension plan.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions, including a total of $2.5 billion related to the construction of Plant Vogtle Units 3 and 4. See FUTURE EARNINGS POTENTIAL – "Construction ProgramsNuclear Construction" herein for additional information on construction of Plant Vogtle Units 3 and 4.
The net cash provided from financing activities in 2019 was primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, capital contributions from Southern Company, and pollution control revenue bonds reoffered to the public, partially offset by payment of common stock dividends and the maturity of senior notes. The net cash used for financing activities in 2018 was primarily due to the redemption and repurchase of senior notes, payment of common stock dividends, and pollution control revenue bond repurchases, partially offset by capital contributions from Southern Company.
Mississippi Power
Net cash provided from operating activities decreased $465 million in 2019 as compared to 2018 primarily due to higher income tax refunds in 2018 as a result of the tax impact of the abandonment of the Kemper IGCC and the voluntary contribution to the qualified pension plan in 2019.
The net cash used for investing activities in 2019 and 2018 was primarily due to gross property additions.
The net cash used for financing activities in 2019 was primarily due to a return of capital to Southern Company and the redemption of senior notes, partially offset by capital contributions from Southern Company and pollution control revenue bonds reoffered to the public. The net cash used for financing activities in 2018 was primarily due to the redemption of preferred stock, long-term bank debt, short-term borrowings, and senior notes, partially offset by the issuance of senior notes and short-term borrowings.
Southern Power
Net cash provided from operating activities increased $754 million in 2019 as compared to 2018 primarily due to the utilization of federal ITCs totaling $734 million in 2019. At December 31, 2019, Southern Power had $1.4 billion of unutilized ITCs and PTCs which are expected to be fully utilized by 2024. See FUTURE EARNINGS POTENTIAL – "Income Tax MattersTax Credits" herein for additional information.
The net cash used for investing activities in 2019 was primarily due to Southern Power's investment in DSGP and ongoing construction activities, largely offset by proceeds from the sales of Plant Nacogdoches and certain wind turbine equipment. The net cash used for investing activities in 2018 was primarily due to the construction of generating facilities and payments for renewable acquisitions, partially offset by proceeds from the disposition of the Florida Plants. See FUTURE EARNINGS POTENTIAL – "Acquisitions and Dispositions" and "Construction Programs" herein and Note 15 to the financial statements for additional information.
The net cash used for financing activities in 2019 was primarily due to returns of capital to Southern Company, the repayment at maturity of senior notes, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by proceeds from net issuances of commercial paper. The net cash used for financing activities in 2018 was primarily due to returns of capital to Southern Company, payments of common stock dividends, and distributions to noncontrolling interests, partially offset by capital contributions from noncontrolling interests.
Southern Company Gas
Net cash provided from operating activities increased $303 million in 2019 as compared to 2018 primarily due to the timing of collection of customer receivables and lower income tax payments, partially offset by the timing of vendor payments and the voluntary contribution to the qualified pension plan.
The net cash used for investing activities in 2019 was primarily due to gross property additions related to utility capital expenditures and infrastructure investments recovered through replacement programs at gas distribution operations and capital contributed to equity method pipeline investments, partially offset by proceeds from the sale of Triton and capital distributions in excess of earnings from equity method pipeline investments. The net cash provided from investing activities in 2018 was primarily due to proceeds from the Southern Company Gas Dispositions, partially offset by gross property additions primarily related to utility capital expenditures and pre-approved rider and infrastructure investments recovered through replacement programs at gas distribution operations as well as net capital contributions to equity method pipeline investments.
The net cash provided from financing activities in 2019 was primarily due to capital contributions from Southern Company and proceeds from the issuance of first mortgage bonds, partially offset by the redemption of long-term debt and payments of common stock dividends. The net cash used for financing activities in 2018 was primarily due to payments of common stock dividends to

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company, return of capital to Southern Company, redemptions of gas facility revenue bonds and senior notes, and repayments of commercial paper borrowings and long-term debt, partially offset by debt issuances and capital contributions from Southern Company.
Significant Balance Sheet Changes
Southern Company
Significant balance sheet changes in 2016 included 2019 for Southern Company included:
decreases in assets and liabilities held for sale of $5.0 billion and $3.3 billion, respectively, and an increase of $2.7 billion in total stockholders' equity primarily related to the sale of Gulf Power;
an increase of $2.3 billion in total property, plant, and equipment primarily related to the traditional electric operating companies' construction of electric generation, transmission, and distribution facilities, including installation of equipment to comply with environmental standards, net of $1.2 billion and $1.0 billion reclassified to other regulatory assets and regulatory assets associated with AROs, respectively, as a result of generating unit retirements at Alabama Power and Georgia Power;
an increase in other regulatory assets of $1.8 billion primarily related to the $1.2 billion reclassification from property, plant, and equipment discussed above and a $0.8 billion increase in regulatory assets associated with retiree benefit plans primarily resulting from a decrease in the overall discount rate used to calculate benefit obligations;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.8 billion, recorded upon the adoption of ASC 842;
an increase of $1.4 billion in regulatory assets associated with AROs primarily related to the $1.0 billion reclassification from property, plant, and equipment discussed above and ARO revisions at Alabama Power and Mississippi Power related to the CCR Rule;
an increase of $1.3 billion in accumulated deferred income taxes primarily related to the expected utilization of tax credit carryforwards in the 2019 tax year as a result of increased taxable income from the sale of Gulf Power; and
a decrease of $206$0.9 billion in notes payable related to net repayments of short-term bank debt and commercial paper.
See Notes 2, 5, 6, 8, 9, 10, 11, and 15 to the financial statements for additional information.
Alabama Power
Significant balance sheet changes in 2019 for Alabama Power included:
an increase of $1.5 billion in total common stockholder's equity primarily due to a $1.2 billion capital contribution from Southern Company;
increases of $0.9 billion in regulatory assets associated with AROs and $0.7 billion in other regulatory assets, deferred primarily due to the impacts of retiring and reclassifying Plant Gorgas Units 8, 9, and 10;
an increase of $0.6 billion in cash and cash equivalents; and
an increase of $0.3 billion in AROs, deferred primarily due to an increase in the ARO estimate related to ash pond facilities.
See Notes 2 and 6 to the financial statements for additional information.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power
Significant balance sheet changes in 2019 for Georgia Power included:
an increase of $1.8 billion in long-term debt (including securities due within one year) primarily due to borrowings from the FFB for construction of Plant Vogtle Units 3 and 4, issuances of senior notes, and pollution control revenue bonds being reoffered to the public;
an increase of $1.6 billion in property, plant, and equipment to comply with environmental standards and the construction of generation, transmission, and distribution facilities, net of approximately $0.8 billion reclassified to regulatory assets due to the retirement of certain generating units as approved in the Georgia Power 2019 IRP;
increases in operating lease right-of-use assets, net of amortization and operating lease obligations, each totaling $1.4 billion, recorded upon the adoption of ASC 842;
an increase of $1.2 billion in regulatory assets primarily due to the $0.8 billion reclassification from property, plant, and equipment discussed above and $0.2 billion associated with retiree benefit plans primarily as a result of a decrease in the overall discount rate used to calculate benefit obligations; and
an increase of $742 million in total common stockholder's equity primarily due to capital contributions from Southern Company.
See Notes 2, 8, 9, and 11 to the financial statements for additional information.
Mississippi Power
Significant balance sheet changes in 2019 for Mississippi Power included:
a decrease of $231 million in long-term debt, primarily due to the early retirement and redemption at maturity of $235 million in senior notes and the reclassification of $85$249 million inof senior notes to securities due within one year and the redemption of $25 million of senior notes, partially offset by $43 million in pollution control revenue bonds reoffered to the public;
an increase of $126 million in notes payable, and an increase of $85$107 million in other property and investments primarily due to a new tolling arrangement accounted for as a sales-type lease;
increases of $67 million in regulatory assets associated with AROs and $31 million in AROs, deferred
a net change of $57 million in accumulated deferred income tax assets and liabilities primarily due to the recognition of a tax loss on the CO2 pipeline transfer and the alternative minimum tax carryforward from prior years.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

primarily related to the retirement of Plant Smith Units 1See Notes 2, 6, 8, 9, and 2 and CCR compliance costs. See Note 3 to the financial statements for additional information related to the retirement of Plant Smith Units 1 and 2.
The Company's ratio of common equity to total capitalization plus short-term debt, was 48.3% and 46.0% at December 31, 2016 and 2015, respectively. See Note 610 to the financial statements for additional information.
Southern Power
Significant balance sheet changes in 2019for Southern Power included:
a $662 million decrease in stockholders' equity due to returns of capital to Southern Company;
a $635 million decrease in accumulated deferred income tax assets primarily related to the utilization of tax credits for the 2019 tax year;
a $619 million decrease in long-term debt (including securities due within one year) related to the maturity of $600 million in senior notes;
a $449 million increase in notes payable due to net issuances of commercial paper; and
increases in operating lease right-of-use assets, net of amortization and operating lease obligations totaling $369 million and $376 million, respectively, recorded upon the adoption of ASC 842.
See Notes 8, 9, and 10 to the financial statements for additional information.
Southern Company Gas
Significant balance sheet changes in 2019 for Southern Company Gas included:
an increase of $950 million in property, plant, and equipment primarily due to utility capital expenditures and infrastructure investments recovered through replacement programs, partially offset by $115 million of asset impairment charges;
additional paid-in-capital of $841 million primarily related to capital contributions from Southern Company;
decreases of $373 million and $414 million in energy marketing receivables and payables, respectively, due to lower natural gas prices and volumes of natural gas sold;

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

a $287 million decrease in equity investments in unconsolidated subsidiaries primarily due to $151 million associated with Pivotal LNG and Atlantic Coast Pipeline reclassified to assets held for sale, as well as distributions from SNG and the sale of Triton;
a $203 million increase in accumulated deferred income taxes primarily due to accelerated tax depreciation and other timing differences;
reclassification of $171 million in total assets held for sale associated with Pivotal LNG and Atlantic Coast Pipeline;
a $95 million decrease in long-term debt primarily due to the redemption of $300 million in senior notes and the repayment of $50 million in first mortgage bonds, partially offset by the issuance of $300 million in first mortgage bonds; and
increases of $93 million in operating right-of-use assets and $92 million in operating lease obligations, respectively, related to the adoption of ASC 842.
See Notes 3, 7, 8, 9, 10, and 15 to the financial statements for additional information.
Sources of Capital
Southern Company intends to meet its future capital needs through operating cash flows, borrowings from financial institutions, and debt and equity issuances in the capital markets. Equity capital can be provided from any combination of Southern Company's stock plans, private placements, or public offerings. Southern Company does not expect to issue any equity in the capital markets through 2024.
The Company plansSubsidiary Registrants plan to obtain the funds required to meet itstheir future capital needs from sources similar to those they used in the past, which were primarily from operating cash flows, short-term debt, external securitysecurities issuances, term loans,borrowings from financial institutions, and equity contributions from Southern Company. However,In addition, Georgia Power plans to utilize borrowings from the FFB, as discussed further in Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings," Southern Power plans to utilize tax equity partnership contributions, as discussed further herein, and Southern Company Gas plans to utilize proceeds from the pending sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, as discussed further in Note 15 to the financial statements under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline."
The amount, type, and timing of any future financings if needed,in 2020, as well as in subsequent years, will be contingent on investment opportunities and the Registrants' capital requirements and will depend upon regulatory approval, prevailing market conditions, regulatory approvals (for the Subsidiary Registrants), and other factors. See "Capital Requirements" herein for additional information.
Security issuances
Southern Power utilizes tax equity partnerships as one of its financing sources, where the tax partner takes significantly all of the federal tax benefits. These tax equity partnerships are consolidated in Southern Power's financial statements and are accounted for using HLBV methodology to allocate partnership gains and losses. During 2019, Southern Power obtained tax equity funding for the Wildhorse Mountain wind project and received proceeds of $97 million. See Notes 1 and 15 to the financial statements under "General" and "Southern Power," respectively, for additional information.
The issuance of securities by the traditional electric operating companies and Nicor Gas is generally subject to annualthe approval of the applicable state PSC or other applicable state regulatory agency. The issuance of all securities by Mississippi Power and short-term securities by Georgia Power is generally subject to regulatory approval by the Florida PSC pursuant to its rules and regulations.FERC. Additionally, with respect to the public offering of securities, Southern Company, the traditional electric operating companies, and Southern Power (excluding its subsidiaries), Southern Company filesGas Capital, and Southern Company Gas (excluding its other subsidiaries) file registration statements with the SEC under the Securities Act of 1933, as amended (1933 Act). The amounts of securities authorized by the Florida PSC,appropriate regulatory authorities, as well as the amountssecurities registered under the 1933 Act, are continuouslyclosely monitored and appropriate filings are made to ensure flexibility in the capital markets.
The Company obtainsRegistrants generally obtain financing separately without credit support from any affiliate. See Note 68 to the financial statements under "Bank"Bank Credit Arrangements"Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of the Companyeach company are not commingled with funds of any other company in the Southern Company system.system, except in the case of Southern Company Gas, as described below.
The Company'straditional electric operating companies and SEGCO may utilize a Southern Company subsidiary organized to issue and sell commercial paper at their request and for their benefit. Proceeds from such issuances for the benefit of an individual company are loaned directly to that company. The obligations of each traditional electric operating company and SEGCO under these arrangements are several and there is no cross-affiliate credit support. Alabama Power also maintains its own separate commercial paper program.
Southern Company Gas Capital obtains external financing for Southern Company Gas and its subsidiaries, other than Nicor Gas, which obtains financing separately without credit support from any affiliates. Southern Company Gas maintains commercial

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

paper programs at Southern Company Gas Capital and Nicor Gas. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of the other Southern Company Gas subsidiaries benefit from Southern Company Gas Capital's commercial paper program.
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2019, the amount of subsidiary retained earnings restricted to dividend totaled $951 million. This restriction did not impact Southern Company Gas' ability to meet its cash obligations, nor does management expect such restriction to materially impact Southern Company Gas' ability to meet its currently anticipated cash obligations.
The Registrants' current liabilities frequently exceed their current assets because of long-term debt maturities and the continuedperiodic use of short-term debt as a funding source, to meet scheduled maturities of long-term debt, as well as significant seasonal fluctuations in cash needs. The Company has substantial cash flow from operating activities and accessSee Note 8 to the financial statements for additional information. Also see "Financing Activities" herein for information on issuances of long-term debt subsequent to December 31, 2019. At December 31, 2019, the following Registrants' current liabilities exceeded their current assets, primarily as a result of securities due within one year and notes payable, as shown in the table below:
At December 31, 2019
Southern Company(*)
Georgia
Power
Mississippi PowerSouthern Power
 (in millions)
Current liabilities in excess of current assets$2,729
$1,902
$125
$945
Securities due within one year2,989
1,025
281
824
Notes payable2,055
365

549
(*)Includes $600 million and $465 million of securities due within one year and notes payable, respectively, at the parent company.
The Registrants believe the need for working capital markets and financial institutions to meet short-term liquidity needs, including itscan be adequately met by utilizing operating cash flows, as well as commercial paper, program which is supported bylines of credit, and short-term bank credit facilities.notes, as market conditions permit. In addition, under certain circumstances, the Subsidiary Registrants may utilize equity contributions and/or loans from Southern Company.
Bank Credit Arrangements
At December 31, 2016,2019, the Company had approximately $56 million of cash and cash equivalents. CommittedRegistrants' unused committed credit arrangements with banks at December 31, 2016 were as follows:
Expires     
Executable
Term Loans
 Expires Within One Year
20172018 Total Unused 
One
Year
 
Two
Years
 Term Out No Term Out
(in millions) (in millions) (in millions) (in millions)
$85$195 $280 $280 $45 $— $25 $60
At December 31, 2019
Southern
Company
parent
Alabama PowerGeorgia
Power
Mississippi Power
Southern
 Power(a)
Southern Company Gas(b)
SEGCO
Southern
Company
 (in millions)
Unused committed credit$1,999
$1,328
$1,733
$150
$591
$1,745
$30
$7,576
(a)At December 31, 2019, Southern Power also had a continuing letter of credit facility for standby letters of credit, of which $23 million was unused. Subsequent to December 31, 2019, Southern Power entered into an additional $60 million continuing letter of credit facility for standby letters of credit. Southern Power's subsidiaries are not parties to its bank credit arrangement or to the letter of credit facilities.
(b)Includes $1.245 billion and $500 million at Southern Company Gas Capital and Nicor Gas, respectively.
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
Most of these bank credit arrangements contain covenants that limit debt levels and contain cross acceleration provisions to other indebtedness (including guarantee obligations) of the Company. Such cross acceleration provisions to other indebtedness would trigger an event of default if the Company defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2016, the Company was in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
Subject to applicable market conditions, the Company expectsRegistrants, Nicor Gas, and SEGCO expect to renew or replace itstheir bank credit arrangements as needed, prior to expiration. In connection therewith, the CompanyRegistrants, Nicor Gas, and SEGCO may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
Most A portion of the unused credit arrangements with banks areis allocated to provide liquidity support to the Company's pollution control revenue bonds of the traditional electric operating companies and the commercial paper programs of the Registrants, Nicor Gas, and SEGCO. See Note 8 to the financial statements under "Bank Credit Arrangements" for additional information.
Short-term Borrowings
The Registrants, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Southern Power's subsidiaries are not issuers or obligors under its commercial paper program. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support as of December 31, 2016 was approximately $82 million. In addition, at December 31, 2016, the Company had $86 million of fixed rate pollution control revenue bonds outstanding that were required to be remarketed within the next 12 months.
The Company may also meetCommercial paper and short-term cash needs through a Southern Company subsidiary organized to issue and sell commercial paper at the request and for the benefit of the Company and the other traditional electric operating companies. Proceeds from such issuances for the benefit of the Company are loaned directly to the Company. The obligations of each traditional electric operating company under these arrangements are several and there is no cross-affiliate credit support. Short-term borrowingsbank term loans are included in notes payable in the balance sheets.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

Details ofthe Registrants' short-term borrowings were as follows:

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 Short-term Debt at the End of the Period 
Short-term Debt During the Period (*)
 Amount Outstanding Weighted Average Interest Rate Average Amount Outstanding Weighted Average Interest Rate Maximum Amount Outstanding
 (in millions)   (in millions)   (in millions)
December 31, 2016         
Commercial paper$168
 1.1% $53
 0.9% $168
Short-term bank debt100
 1.5% 64
 1.3% 100
Total$268
 1.2% $117
 1.1%  
December 31, 2015         
Commercial paper$142
 0.7% $101
 0.4% $175
Short-term bank debt
 % 10
 0.7% 40
Total$142
 0.7% $111
 0.4%  
December 31, 2014         
Commercial paper$110
 0.3% $85
 0.2% $145

 Short-term Debt at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 December 31, December 31,
 201920182017 201920182017
 (in millions)    
Southern Company$2,055
$2,915
$2,439
 2.1%3.1%1.9%
Alabama Power

3
 

3.7
Georgia Power365
294
150
 2.2
3.1
2.2
Mississippi Power

4
 

3.8
Southern Power549
100
105
 2.2
3.1
2.0
Southern Company Gas:





    
Southern Company Gas Capital$372
$403
$1,243
 2.1%3.1%1.7%
Nicor Gas278
247
275
 1.8
3.0
1.8
Southern Company Gas Total$650
$650
$1,518
 2.0%3.0%1.8%
 
Short-term Debt During the Period(*)
 Average Amount Outstanding 
Weighted Average
Interest Rate
 Maximum Amount Outstanding
 201920182017 201920182017 201920182017
 (in millions)     (in millions)
Southern Company$1,240
$3,377
$2,672
 2.6%2.6%1.5% $2,914
$5,447
$3,668
Alabama Power17
27
25
 2.6
2.3
1.3
 190
258
223
Georgia Power371
139
427
 2.7
2.5
1.8
 935
710
1,460
Mississippi Power
68
18
 
2.0
3.0
 
300
36
Southern Power76
188
232
 2.7
2.5
1.4
 578
385
419
Southern Company Gas:           
Southern Company Gas Capital$302
$520
$723
 2.6%2.3%1.4% $490
$1,361
$1,243
Nicor Gas91
123
176
 2.3
2.2
1.1
 278
275
525
Southern Company Gas Total$393
$643
$899
 2.5%2.3%1.4%    
(*)Average and maximum amounts are based upon daily balances during the year.12-month periods ended December 31, 2019, 2018, and 2017.
The

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company believes the need for working capital can be adequately met by utilizing the commercial paper program, lines of credit, short-term bank term loans, and operating cash flows.Subsidiary Companies 2019 Annual Report

Financing Activities
In May 2016,The following table outlines the Company redeemed $125 million aggregate principal amount of its Series 2011A 5.75% Senior Notes due June 1, 2051.Registrants' long-term debt financing activities for the year ended December 31, 2019:
Also in May 2016,
Company
Senior
Note
Issuances
 
Senior Note
Maturities, Redemptions, and Repurchases
 
Revenue
Bond
Issuances and
Reofferings
of Purchased
Bonds
 
Revenue
Bond
Maturities, Redemptions,
 and Repurchases
 
Other
Long-Term
Debt
Issuances
 
Other
Long-Term
Debt
Redemptions
and
Maturities(a)
 (in millions)
Southern Company parent$
 $2,400
 $
 $
 $1,725
 $
Alabama Power600
 200
 
 
 
 1
Georgia Power750
 500
 584
 223
 1,218
 13
Mississippi Power
 25
 43
 
 
 
Southern Power
 600
 
 
 
 
Southern Company Gas
 300
 
 
 300
 50
Other
 
 
 25
 
 17
Elimination(b)

 
 
 
 
 (7)
Southern Company$1,350
 $4,025
 $627
 $248
 $3,243
 $74
(a)Includes reductions in finance lease obligations resulting from cash payments under finance leases.
(b)Represents reductions in affiliate finance lease obligations at Georgia Power, which are eliminated in Southern Company's consolidated financial statements.
Except as otherwise described herein, the Company entered into an 11-month floating rate bank loan bearing interest based on one-month LIBOR. This short-term loan was for $100 million aggregate principal amount andRegistrants used the proceeds were usedof debt issuances for their redemptions and maturities shown in the table above, to repay existingshort-term indebtedness, and for working capital and other general corporate purposes.
In December 2016, the Company repaid at maturity $110 million aggregate principal amount of its Series M 5.30% Senior Notes due December 1, 2016.
Subsequent to December 31, 2016, the Company issued 1,750,000 shares of common stock to Southern Company and realized proceeds of $175 million. The proceeds were used for general corporate purposes, including working capital. The Subsidiary Registrants also used the Company's continuousproceeds for their construction program.programs.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, and storm recovery, the Company plansRegistrants plan to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Southern Company
During 2019, Southern Company issued approximately 19.5 million shares of common stock through employee equity compensation plans and received proceeds of approximately $844 million.
In addition, in August 2019, Southern Company issued 34.5 million 2019 Series A Equity Units (Equity Units), initially in the form of corporate units (Corporate Units), at a stated amount of $50 per Corporate Unit, for a total stated amount of $1.725 billion. Net proceeds from the issuance were approximately $1.682 billion. Each Corporate Unit is comprised of (i) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019A Remarketable Junior Subordinated Notes due 2024, (ii) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019B Remarketable Junior Subordinated Notes due 2027, and (iii) a stock purchase contract, which obligates the holder to purchase from Southern Company, no later than August 1, 2022, a certain number of shares of Southern Company's common stock for $50 in cash. See Note 8 to the financial statements under "Equity Units" for additional information.
In January 2019, Southern Company repaid a $250 million short-term uncommitted bank credit arrangement and a $1.5 billion short-term floating rate bank loan.
In 2019, Southern Company, through repurchases and redemptions, retired all $1.0 billion aggregate principal amount of its 1.85% Senior Notes due July 1, 2019, $350 million aggregate principal amount of its Series 2014B 2.15% Senior Notes due September 1, 2019, $750 million aggregate principal amount of its Series 2018A Floating Rate Notes due February 14, 2020, and $300 million aggregate principal amount of its Series 2017A Floating Rate Senior Notes due September 30, 2020.
Subsequent to December 31, 2019, Southern Company issued $1.0 billion aggregate principal amount of Series 2020A 4.95% Junior Subordinated Notes due January 30, 2080.
Alabama Power
In February 2019, Alabama Power repaid at maturity $200 million aggregate principal amount of Series Z 5.125% Senior Notes due February 15, 2019.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In September 2019, Alabama Power issued $600 million aggregate principal amount of Series 2019A 3.45% Senior Notes due October 1, 2049.
Subsequent to December 31, 2019, Alabama Power received a capital contribution totaling $610 million from Southern Company.
Georgia Power
In March and December 2019, Georgia Power made borrowings under the multi-advance credit facilities related to the Amended and Restated Loan Guarantee Agreement in an aggregate principal amount of $835 million and $383 million, respectively, with applicable interest rates of 3.213% and 2.537%, respectively, both for an interest period that extends to the final maturity date of February 20, 2044. The proceeds were used to reimburse Georgia Power for Eligible Project Costs relating to the construction of Plant Vogtle Units 3 and 4. See Note 8 to the financial statements under "Long-term DebtDOE Loan Guarantee Borrowings" for additional information.
In June 2019, Georgia Power entered into two short-term floating rate bank loans in aggregate principal amounts of $125 million each, both of which bear interest based on one-month LIBOR.
In September 2019, Georgia Power issued $400 million aggregate principal amount of Series 2019A 2.20% Senior Notes due September 15, 2024 and $350 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
Subsequent to December 31, 2019, Georgia Power issued $700 million aggregate principal amount of Series 2020A 2.10% Senior Notes due July 30, 2023, $500 million aggregate principal amount of Series 2020B 3.70% Senior Notes due January 30, 2050, and an additional $300 million aggregate principal amount of Series 2019B 2.65% Senior Notes due September 15, 2029.
During 2019, Georgia Power reoffered to the public the following pollution control revenue bonds that previously had been purchased and were held by Georgia Power at December 31, 2018:
$173 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2009;
approximately $105 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 2013;
$65 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Second Series 2008;
$55 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), Fifth Series 1994; and
approximately $72 million aggregate principal amount of Development Authority of Bartow County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Bowen Project), First Series 2013.
During 2019, Georgia Power purchased, held, and subsequently reoffered to the public an additional $115 million of pollution control revenue bonds.
In January 2019, Georgia Power redeemed approximately $13 million, $20 million, and $75 million aggregate principal amount of Development Authority of Burke County (Georgia) Pollution Control Revenue Bonds (Georgia Power Company Plant Vogtle Project), First Series 1992, Eighth Series 1994, and Second Series 1995, respectively.
In December 2019, Georgia Power repaid at maturity $500 million aggregate principal amount of its Series 2009B 4.25% Senior Notes.
Subsequent to December 31, 2019, Georgia Power received a capital contribution totaling $500 million from Southern Company and announced the redemption of all $500 million aggregate principal amount of its Series 2017C 2.00% Senior Notes due September 8, 2020.
Mississippi Power
In March 2019, Mississippi Power reoffered to the public approximately $43 million of Mississippi Business Finance Corporation Pollution Control Revenue Refunding Bonds, Series 2002, which previously had been purchased and held by Mississippi Power.
In December 2019, Mississippi Power redeemed $25 million aggregate principal amount of its Series 2018A Floating Rate Senior Notes due March 27, 2020.
Southern Power
In May 2019, Southern Power repaid at maturity a $100 million short-term floating rate bank loan.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In December 2019, Southern Power repaid at maturity $600 million aggregate principal amount of its Series 2016D 1.95% Senior Notes.
Also in December 2019, Southern Power entered into a short-term floating rate bank loan in the aggregate principal amount of $100 million, bearing interest based on one-month LIBOR. Subsequent to December 31, 2019, Southern Power repaid the bank loan.
Southern Company Gas
In July 2019, Nicor Gas repaid at maturity $50 million aggregate principal amount of its 4.7% first mortgage bonds.
In August 2019, Southern Company Gas Capital repaid at maturity $300 million aggregate principal amount of its 5.25% Senior Notes.
In August and October 2019, Nicor Gas issued $200 million and $100 million, respectively, aggregate principal amount of first mortgage bonds in a private placement.
Credit Rating Risk
At December 31, 2016,2019, the CompanyRegistrants did not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change of certain Registrants to BBB-BBB and/or Baa3Baa2 or below. These contracts are primarily for physical electricity and natural gas purchases and sales, fuel purchases, fuel transportation and storage, transmission, and energy price risk management.management, transmission, interest rate management, and, for Georgia Power, construction of new generation at Plant Vogtle Units 3 and 4.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report

The maximum potential collateral requirements under these contracts at December 31, 20162019 were as follows:
Credit Ratings
Maximum
Potential
Collateral
Requirements
Southern Company(*)
Alabama PowerGeorgia PowerMississippi Power
Southern
Power(*)
Southern Company Gas
(in millions)(in millions)
At BBB and/or Baa2$36
$1
$
$
$35
$
At BBB- and/or Baa3$192
472
1
86

385

Below BBB- and/or Baa3$628
At BB+ and/or Ba1 or below2,040
322
1,020
267
1,174
18
(*)Excludes amounts related to Plant Mankato, which was sold on January 17, 2020. Southern Power has PPAs that could require collateral, but not accelerated payment, in the event of a downgrade of Southern Power's credit. The PPAs require credit assurances without stating a specific credit rating. The amount of collateral required would depend upon actual losses resulting from a credit downgrade. Southern Power had $104 million of cash collateral posted related to PPA requirements at December 31, 2019.
IncludedThe potential collateral requirement amounts in these amounts arethe previous table for the traditional electric operating companies and Southern Power include certain agreements that could require collateral in the event that either Alabama Power or Georgia Power has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of the CompanyRegistrants to access capital markets and would be likely to impact the cost at which it doesthey do so.
Mississippi Power and its largest retail customer, Chevron, have agreements under which Mississippi Power continues to provide retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.
On January 10, 2017,August 1, 2019, Moody's upgraded Mississippi Power's senior unsecured long-term debt rating to Baa2 from Baa3 and maintained the positive rating outlook.
On September 12, 2019, S&P revised its consolidated creditupgraded the senior unsecured long-term debt rating outlook for of Alabama Power to A from A-, the long-term issuer rating of Nicor Gas to A from A-, and the senior secured debt rating of Nicor Gas to A+ from A. The ratings outlooks remained negative.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company (including the Company) from negative to stable.and Subsidiary Companies 2019 Annual Report

Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, the Company continues to have limited exposureThe Registrants are exposed to market volatility inrisks, including commodity price risk, interest rates, commodity fuel prices,rate risk, weather risk, and prices of electricity.occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the Companyapplicable company nets the exposures, where possible, to take advantage of natural offsets and may enterenters into various derivative transactions for the remaining exposures pursuant to the Company'sapplicable company's policies in areas such as counterparty exposure and risk management practices. The Company'sSouthern Company Gas' wholesale gas operations uses various contracts in its commercial activities that generally meet the definition of derivatives. For the traditional electric operating companies, Southern Power, and Southern Company Gas' other businesses, each company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate futureDue to cost-based rate regulation and other various cost recovery mechanisms, the traditional electric operating companies and the natural gas distribution utilities that sell natural gas directly to end-use customers continue to have limited exposure to changesmarket volatility in interest rates, foreign currency exchange rates, commodity fuel prices, and prices of electricity. The traditional electric operating companies and certain of the Company may enter into derivatives which are designated as hedges. The weighted average interest rate on $82 millionnatural gas distribution utilities manage fuel-hedging programs implemented per the guidelines of outstanding variable ratetheir respective state PSCs or other applicable state regulatory agencies to hedge the impact of market fluctuations in natural gas prices for customers. Mississippi Power also manages wholesale fuel-hedging programs under agreements with its wholesale customers. Because energy from Southern Power's facilities is primarily sold under long-term debt that has not been hedged at January 1, 2017 was 0.79%. IfPPAs with tolling agreements and provisions shifting substantially all of the Company sustained a 100 basis point change in interest ratesresponsibility for all variable rate long-term debt, the change would not materially affect annualized interest expense at January 1, 2017. See Note 1fuel cost to the financial statements under "Financial Instruments"counterparties, Southern Power's exposure to market volatility in commodity fuel prices and Note 10prices of electricity is generally limited. However, Southern Power has been and may continue to the financial statements for additional information.
be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity. To mitigate residual risks relative to movements in fuel and electricity prices, the Company enterstraditional electric operating companies and Southern Power may enter into financial hedge contracts for natural gas purchases and physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases; however, a significant portion of contracts are priced at market.
Certain of Southern Company Gas' non-regulated operations routinely utilize various types of derivative instruments to economically hedge certain commodity price and weather risks inherent in the natural gas industry. These instruments include a variety of exchange-traded and OTC energy contracts, such as forward contracts, futures contracts, options contracts, and swap agreements. Southern Company Gas' gas marketing services and wholesale gas services businesses also actively manage storage positions through a variety of hedging transactions for the purpose of managing exposures arising from changing natural gas prices. These hedging instruments are used to substantially protect economic margins (as spreads between wholesale and retail natural gas prices widen between periods) and thereby minimize exposure to declining operating margins. Some of these economic hedge activities may not qualify, or may not be designated, for hedge accounting treatment.
The Company continues to manage a fuel-hedging program implemented per the guidelines of the Florida PSC and the actual cost of fuel is recovered through the retail fuel clause. The Florida PSC approved a stipulation and agreement that prospectively imposed a moratorium on the Company's fuel-hedging program in October 2016 through December 31, 2017. The CompanyRegistrants had no material change in market risk exposure for the year ended December 31, 20162019 when compared to the year ended December 31, 2015.2018. See Note 1 to the financial statements under "Financial Instruments" and Note 14 to the financial statements for additional information.
The Registrants may enter into interest rate derivatives designated as hedges, which are intended to mitigate interest rate volatility related to forecasted debt financings and existing fixed and floating rate obligations. Outstanding interest rate derivatives at December 31, 2019 are as follows:
At December 31, 2019
Southern Company(*)
Georgia
Power
Southern Company
Gas
 (in millions)
Hedges of forecasted debt$700
$500
$200
Hedges of existing debt1,800


Total$2,500
$500
$200
(*)Includes $1.8 billion of hedges of existing debt at the Southern Company parent.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table provides information related to variable interest rate exposure on long-term debt (including amounts due within one year) at December 31, 2019 for the applicable Registrants:
At December 31, 2019
Southern Company(*)
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
 (in millions, except percentages)
Long-term variable interest rate exposure$4,063
$1,079
$550
$308
$525
Weighted average interest rate on long-term variable interest rate exposure2.38%2.35%1.74%2.51%2.46%
Impact on annualized interest expense of 100 basis point change in interest rates$41
$11
$6
$3
$5
(*)Includes $1.5 billion of long-term variable interest rate exposure at the Southern Company parent entity.
Southern Power Company had foreign currency denominated debt of €1.1 billion at December 31, 2019. Southern Power Company has mitigated its exposure to foreign currency exchange rate risk through the use of foreign currency swaps converting all interest and principal payments to fixed-rate U.S. dollars.
The changes in fair value of energy-related derivative contracts for Southern Company and Southern Company Gas for the years ended December 31, 2019 and 2018 are provided in the table below. The fair value of energy-related derivative contracts was not material for the other Registrants.
 
Southern Company(a)
Southern Company Gas(a)
 (in millions)
Contracts outstanding at December 31, 2017, assets (liabilities), net$(163)$(106)
Contracts realized or settled93
66
Current period changes(b)
(131)(127)
Contracts outstanding at December 31, 2018, assets (liabilities), net$(201)$(167)
Contracts realized or settled69
26
Current period changes(b)
105
213
Disposition6

Contracts outstanding at December 31, 2019, assets (liabilities), net$(21)$72
(a)Excludes cash collateral held on deposit in broker margin accounts of $99 million, $277 million, and $193 million at December 31, 2019, 2018, and 2017, respectively, and premium and intrinsic value associated with weather derivatives of $4 million, $8 million, and $11 million at December 31, 2019, 2018, and 2017, respectively.
(b)The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, substantially all of which are composed of regulatory hedges, were as follows:
 
2016
Changes
 
2015
Changes
 Fair Value
 (in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net$(100) $(72)
Contracts realized or settled49
 47
Current period changes(*)
27
 (75)
Contracts outstanding at the end of the period, assets (liabilities), net$(24) $(100)
(*)Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts were 51 million mmBtu and 82 million mmBtu as offor natural gas purchased (sold) at December 31, 20162019 and December 31, 2015, respectively.2018 for Southern Company and Southern Company Gas were as follows:
 Southern CompanySouthern Company Gas
 
mmBtu Volume (in millions)
At December 31, 2019:  
Commodity – Natural gas swaps327

Commodity – Natural gas options262
218
Total hedge volume589
218
   
At December 31, 2018:  
Commodity – Natural gas swaps287

Commodity – Natural gas options144
120
Total hedge volume431
120


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Southern Company Gas' derivative contracts are comprised of both long and short natural gas positions. A long position is a contract to purchase natural gas, and a short position is a contract to sell natural gas. The volumes presented above for Southern Company Gas represent the net of long natural gas positions of 4.10 billion mmBtu and short natural gas positions of 3.88 billion mmBtu at December 31, 2019 and the net of long natural gas positions of 4.16 billion mmBtu and short natural gas positions of 4.04 billion mmBtu at December 31, 2018.
For the Southern Company system, the weighted average swap contract cost above market prices was approximately $0.48$0.28 and $0.12 per mmBtu as ofat December 31, 20162019 and $1.17 per mmBtu as2018, respectively. The change in option fair value is primarily attributable to the volatility of December 31, 2015. Naturalthe market and the underlying change in the natural gas settlementsprice. Substantially all of the traditional electric operating companies' natural gas hedge gains and losses are recovered through the Company'stheir respective fuel cost recovery clause.clauses.
At December 31, 20162019 and 2015,2018, substantially all of the Company'straditional electric operating companies' and certain of the natural gas distribution utilities' energy-related derivative contracts were designated as regulatory hedges and were related to the Company'sapplicable company's fuel-hedging program. Therefore, gainsGains and losses associated with regulatory hedges are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expenseexpense/cost of natural gas as they are recovered through the fueltheir respective cost recovery clause. Gains and losses on energy-related derivatives designated as cash flow hedges, which are used to hedge anticipated purchases and sales, are initially deferred in AOCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurredincurred. See Note 14 to the financial statements for additional information.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and were not material forthis type of derivative is both common and prevalent within the electric and natural gas industries. When an energy-related derivative contract is settled physically, any year presentedcumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual costprice of fuel is recovered through the retail fuel clause. The moratorium imposed by the Florida PSC does not have an impact on the recovery of existing hedges entered into under the previously-approved hedging program.underlying goods being delivered.
The Company usesRegistrants use over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. In addition, Southern Company Gas uses exchange-traded market-observable contracts, which are categorized as Level 1, and contracts that include a combination of observable and unobservable components, which are categorized as Level 3. See Note 913 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts which are all Level 2 of the fair value hierarchy,for Southern Company and Southern Company Gas at December 31, 20162019 were as follows:
 
Fair Value Measurements
December 31, 2016
 Total Maturity
 Fair Value Year 1 Years 2&3 Years 4&5
 (in millions)
Level 1$
 $
 $
 $
Level 2(24) (8) (16) 
Level 3
 
 
 
Fair value of contracts outstanding at end of period$(24) $(8) $(16) $
 Fair Value Measurements of Contracts at
 December 31, 2019
 
Total
Fair Value
 Maturity
  Year 1 Years 2&3 Years 4&5
 (in millions)
Southern Company       
Level 1(a)
$(53) $(19) $(37) $3
Level 2(b)
18
 42
 (25) 1
Level 314
 10
 1
 3
Southern Company total(c)
$(21) $33
 $(61) $7
        
Southern Company Gas       
Level 1(a)
$(53) $(19) $(37) $3
Level 2(b)
111
 98
 11
 2
Level 314
 10
 1
 3
Southern Company Gas total(c)
$72
 $89
 $(25) $8
(a)Valued using NYMEX futures prices.
(b)Level 2 amounts for Southern Company Gas are valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers.
(c)Excludes cash collateral of $99 million as well as premium and associated intrinsic value associated with weather derivatives of $4 million at December 31, 2019.
The Company isRegistrants are exposed to market price risk in the event of nonperformance by counterparties to the energy-related and interest rate derivative contracts.contracts, as applicable. The CompanyRegistrants only entersenter into agreements and material transactions with counterparties that have

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

investment grade credit ratings by Moody's and S&P, or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Company doesRegistrants do not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments""Financial Instruments" and Note 1014 to the financial statements.
Through 2015, long-term non-affiliate capacity sales fromSouthern Company performs periodic reviews of its leveraged lease transactions, both domestic and international, and the Company's ownership of Plant Scherer Unit 3 provided the majoritycreditworthiness of the Company's wholesale earnings. Contract expirations at the end of 2015 and the end of May 2016 related to Plant Scherer Unit 3 wholesale sales hadlessees, including a material negative impact on the Company's earnings in 2016. Remaining contract sales from Plant Scherer Unit 3 cover approximately 24%review of the Company's ownership of the unit through 2019. The Company has requested recovery through retail rates for the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers. Therefore, the retail recoverability of these costs will be decided in the 2016 Rate Case. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, the Company may consider an asset sale. The current book value of the underlying leased assets and the credit ratings of the lessees. Southern Company's ownershipdomestic lease transactions generally do not have any credit enhancement mechanisms; however, the lessees in its international lease transactions have pledged various deposits as additional security to secure the obligations. The lessees in Southern Company's international lease transactions are also required to provide additional collateral in the event of Plant Scherer Unit 3 could exceed market value which could result in a material loss.credit downgrade below a certain level. See NoteNotes 1 and 3 to the financial statements under "Retail Regulatory"Leveraged Leases" and "Other MattersRetail Base Rate Cases"Southern Company," respectively, for additional information.
Southern Company Gas Value at Risk (VaR)
VaR is the maximum potential loss in portfolio value over a specified time period that is not expected to be exceeded within a given degree of probability. Southern Company Gas' VaR may not be comparable to that of other companies due to differences in the factors used to calculate VaR. Southern Company Gas' VaR is determined on a 95% confidence interval and a one-day holding period, which means that 95% of the time, the risk of loss in a day from a portfolio of positions is expected to be less than or equal to the amount of VaR calculated. The open exposure of Southern Company Gas is managed in accordance with established policies that limit market risk and require daily reporting of potential financial exposure to senior management. Because Southern Company Gas generally manages physical gas assets and economically protects its positions by hedging in the futures markets, Southern Company Gas' open exposure is generally mitigated. Southern Company Gas employs daily risk testing, using both VaR and stress testing, to evaluate the risk of its positions.
Southern Company Gas actively monitors open commodity positions and the resulting VaR and maintains a relatively small risk exposure as total buy volume is close to sell volume, with minimal open natural gas price risk. Based on a 95% confidence interval and employing a one-day holding period, SouthStar's portfolio of positions for all periods presented was immaterial.
Southern Company Gas' wholesale gas services segment had the following VaRs at December 31:
 201920182017
 (in millions)
Period end(*)
$2.6
$6.4
$4.8
Average3.4
3.7
2.0
High(*)
7.0
11.7
4.8
Low2.1
1.2
1.0
(*)The increase in VaR at December 31, 2018 reflects significant natural gas price increases in Sequent's key markets driven by an industry-wide lower-than-normal natural gas storage inventory position and colder-than-normal weather in the middle of fourth quarter 2018. As weather and natural gas prices moderated subsequent to December 31, 2018, VaR reduced.
Credit Risk
Southern Company (except as discussed herein), the traditional electric operating companies, and Southern Power are not exposed to any concentrations of credit risk. Southern Company Gas' exposure to concentrations of credit risk is discussed herein.
Southern Company Gas
Gas Distribution Operations
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 16 Marketers in Georgia. The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of two times a Marketer's highest month's estimated bill from Atlanta Gas Light. For 2019, the four largest Marketers based on customer count, which includes SouthStar, accounted for 21% of Southern Company Gas' adjusted operating margin and 27% of adjusted operating margin for Southern Company Gas' gas distribution operations segment.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Several factors are designed to mitigate Southern Company Gas' risks from the increased concentration of credit that has resulted from deregulation. In addition to the security support described above, Atlanta Gas Light bills intrastate delivery service to Marketers in advance rather than in arrears. Atlanta Gas Light accepts credit support in the form of cash deposits, letters of credit/surety bonds from acceptable issuers, and corporate guarantees from investment-grade entities. Southern Company Gas reviews the adequacy of credit support coverage, credit rating profiles of credit support providers, and payment status of each Marketer. Southern Company Gas believes that adequate policies and procedures are in place to properly quantify, manage, and report on Atlanta Gas Light's credit risk exposure to Marketers.
Atlanta Gas Light also faces potential credit risk in connection with assignments of interstate pipeline transportation and storage capacity to Marketers. Although Atlanta Gas Light assigns this capacity to Marketers, in the event that a Marketer fails to pay the interstate pipelines for the capacity, the interstate pipelines would likely seek repayment from Atlanta Gas Light.
Wholesale Gas Services
Southern Company Gas has established credit policies to determine and monitor the creditworthiness of counterparties, as well as the quality of pledged collateral. Southern Company Gas also utilizes netting agreements whenever possible to mitigate exposure to counterparty credit risk. When Southern Company Gas is engaged in more than one outstanding derivative transaction with the same counterparty and also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Netting agreements enable Southern Company Gas to net certain assets and liabilities by counterparty. Southern Company Gas also nets across product lines and against cash collateral, provided the netting and cash collateral agreements include such provisions.
Southern Company Gas may require counterparties to pledge additional collateral when deemed necessary. Southern Company Gas conducts credit evaluations and obtains appropriate internal approvals for a counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, Southern Company Gas requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
Certain of Southern Company Gas' derivative instruments contain credit-risk-related or other contingent features that could increase the payments for collateral it posts in the normal course of business when its financial instruments are in net liability positions. At December 31, 2019, for agreements with such features, Southern Company Gas' derivative instruments with liability fair values were immaterial and Southern Company Gas had no collateral posted with derivatives counterparties to satisfy these arrangements.
Southern Company Gas has a concentration of credit risk as measured by its 30-day receivable exposure plus forward exposure. At December 31, 2019, the top 20 counterparties of Southern Company Gas' wholesale gas services segment represented approximately 59%, or $218 million, of its total counterparty exposure and had a weighted average S&P equivalent credit rating of A-, all of which is consistent with the prior year. The S&P equivalent credit rating is determined by a process of converting the lower of the S&P or Moody's ratings to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being D / Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of the financial ratios of that counterparty. To arrive at the weighted average credit rating, each counterparty is assigned an internal ratio, which is multiplied by their credit exposure and summed for all counterparties. The sum is divided by the aggregate total counterparties' exposures, and this numeric value is then converted to a S&P equivalent.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table provides credit risk information related to Southern Company Gas' third-party natural gas contracts receivable and payable positions at December 31:
 Gross Receivables Gross Payables
 2019 2018 2019 2018
 (in millions) (in millions)
Netting agreements in place:       
Counterparty is investment grade$238
 $461
 $127
 $255
Counterparty is non-investment grade1
 5
 43
 95
Counterparty has no external rating175
 314
 272
 505
No netting agreements in place:       
Counterparty is investment grade14
 19
 
 1
Counterparty has no external rating
 2
 
 
Amount recorded in balance sheets$428
 $801
 $442
 $856
Gas Marketing Services
Southern Company Gas obtains credit scores for its firm residential and small commercial customers using a national credit reporting agency, enrolling only those customers that meet or exceed Southern Company Gas' credit threshold. Southern Company Gas considers potential interruptible and large commercial customers based on reviews of publicly available financial statements and commercially available credit reports. Prior to entering into a physical transaction, Southern Company Gas also assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements.
Capital Requirements
Total estimated capital expenditures for the Registrants through 2024 based on their current construction programs are as follows:
 20202021202220232024
 (in billions)
Southern Company(a)(b)(c)(d)
$8.7
$7.3
$6.8
$6.8
$6.2
Alabama Power(b)
2.1
1.8
1.8
1.8
1.6
Georgia Power(c)
4.1
3.4
3.0
2.8
2.7
Mississippi Power0.3
0.2
0.2
0.3
0.2
Southern Power(d)
0.3
0.2
0.1
0.1
0.1
Southern Company Gas1.8
1.6
1.6
1.7
1.6
(a)Includes the Subsidiary Registrants, as well the other subsidiaries.
(b)
Includes amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $0.5 billion for 2020, $0.2 billion for 2021, $0.3 billion for 2022, and $0.1 billion for 2023. See FUTURE EARNINGS POTENTIAL – "Regulatory MattersAlabama PowerPetition for Certificate of Convenience and Necessity" herein for additional information.
(c)These amounts include expenditures of approximately $1.6 billion, $0.9 billion, and $0.3 billion for the construction of Plant Vogtle Units 3 and 4 in 2020, 2021, and 2022, respectively.
(d)These amounts do not include approximately $0.5 billion per year for 2020 through 2024 for Southern Power's planned expenditures for plant acquisitions and placeholder growth, which may vary materially due to market opportunities and Southern Power's ability to execute its growth strategy.
These amounts include estimated capital expenditures to comply with environmental laws and Contractual Obligations
The construction programregulations, but do not include any potential compliance costs associated with pending regulation of the Company is currently estimated to total $227 millionCO2 emissions from fossil fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters" herein for 2017, $218 million for 2018, $219 million for 2019, $265 million for 2020, and $225 million for 2021.additional information. These amounts also include capital expenditures related to contractual purchase commitments for nuclear fuel (for Southern Company, Alabama Power, and Georgia Power) and capital expenditures covered under long-term service agreements. Estimated capital expenditures to comply with environmental statutes and regulations included in these amounts are $33 million, $52 million, $57 million, $55 million, and $48 million for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential compliance costs that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from new, existing, modified, or reconstructed fossil-fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" and "– Global Climate Issues" herein for additional information.LTSAs.
The Companytraditional electric operating companies also anticipatesanticipate costs associated with closure and monitoring of ash ponds at Plant Scholz and landfills in accordance with the CCR Rule and the related state rules, which are reflected in the Company'sapplicable Registrants' ARO liabilities. These costs, which could change as the Company continues to refine its assumptions underlying theAlabama Power's cost estimates and evaluate the method and timingare based on closure-in-place for all of compliance activities, are estimatedits ash ponds. The cost estimates for Georgia


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Power and Mississippi Power are based on a combination of closure-in-place for some ash ponds and closure by removal for others. These anticipated costs are likely to be $16 million, $17 million, $6 million, $26 million,change, and $8 million for the years 2017, 2018, 2019, 2020,could change materially, as assumptions and 2021, respectively.details pertaining to closure are refined and compliance activities continue. See FUTURE EARNINGS POTENTIAL – "Environmental MattersEnvironmental Laws and RegulationsCoal Combustion Residuals" herein and Note 16 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information. The current estimates of these costs through 2024 are as follows:
 20202021202220232024
 (in millions)
Southern Company$498
$551
$742
$916
$967
Alabama Power200
217
284
363
386
Georgia Power265
289
391
475
530
Mississippi Power23
29
24
23
20
The construction program isprograms are subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; storm impacts; changes in environmental statuteslaws and regulations; the outcome of any legal challenges to the environmental rules; changes in electric generating plants, including unit retirements and replacements and adding or changing fuel sources at existing electric generating units, to meet regulatory requirements; changes in FERC rules and regulations; state regulatory agency approvals; changes in the expected environmental compliance program; changes in FERC rules and regulations; Florida PSC approvals; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; abnormal weather; delays in construction due to judicial or regulatory action; storm impacts; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered. Additionally, Southern Power's planned expenditures for plant acquisitions may vary due to market opportunities and Southern Power's ability to execute its growth strategy. See Note 15 to the financial statements under "Southern Power" for additional information regarding Southern Power's plant acquisitions and construction projects.
In addition, as discussedThe construction program of Georgia Power also includes Plant Vogtle Units 3 and 4, which includes components based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale and which may be subject to additional revised cost estimates during construction. See Note 2 to the financial statements the Company provides postretirement benefits to substantially all employeesunder "Georgia PowerNuclear Construction" for information regarding Plant Vogtle Units 3 and funds trusts to the extent required by the FERC4 and the Florida PSC.additional factors that may impact construction expenditures.
OtherSee FUTURE EARNINGS POTENTIAL – "Construction Programs" herein for additional information. Also see "Contractual Obligations" herein for information regarding other future funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, preference stock dividends, leases, and other purchase commitments are detailed in the contractual obligations table that follows. See Notes 1, 2, 5, 6, 7, and 10 to the financial statements for additional information.Registrants.


COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Contractual Obligations
ContractualThe following tables present the Registrants' contractual obligations at December 31, 2016 were as follows:2019. Additional information about these funding requirements is provided herein.
 2017 
2018-
2019
 
2020-
2021
 
After
2021
 Total
 (in millions)
Long-term debt(a) –
         
Principal$87
 $
 $175
 $824
 $1,086
Interest42
 73
 65
 515
 695
Financial derivative obligations(b)
12
 17
 
 
 29
Preference stock dividends(c)
9
 18
 18
 
 45
Operating leases(d)
8
 7
 
 1
 16
Purchase commitments –         
Capital(e)
227
 437
 462
 
 1,126
Fuel(f)
261
 290
 162
 70
 783
Purchased power(g)
126
 261
 271
 1,044
 1,702
Other(h)
8
 24
 34
 136
 202
Pension and other postretirement benefit plans(i)
5
 11
 
 
 16
Total$785
 $1,138
 $1,187
 $2,590
 $5,700
Southern Company2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$2,971
 $5,189
 $2,890
 $33,489
 $44,539
Interest1,677
 3,109
 2,809
 25,986
 33,581
Financial derivative obligations450
 204
 65
 
 719
Operating leases294
 543
 386
 1,609
 2,832
Finance leases31
 47
 33
 246
 357
Pipeline charges, storage capacity, and gas supply725
 1,085
 784
 1,677
 4,271
Purchase commitments –        

Capital7,758
 12,981
 11,989
   32,728
Fuel2,787
 3,491
 1,527
 4,546
 12,351
Purchased power150
 270
 237
 1,725
 2,382
Other406
 618
 530
 2,174
 3,728
ARO settlements498
 1,293
 1,883
   3,674
Other(*)
163
 310
 38
 65
 576
Southern Company system total$17,910
 $29,140
 $23,171
 $71,517
 $141,738
(a)(*)Includes funding requirements related to pension and other postretirement benefit plans, nuclear decommissioning trusts of Georgia Power, and preferred stock dividends of Alabama Power.
Alabama Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$250
 $1,060
 $321
 $6,956
 $8,587
Interest338
 649
 578
 4,985
 6,550
Preferred stock dividends15
 29
 29
 
 73
Financial derivative obligations14
 10
 
 
 24
Operating leases54
 105
 5
 1
 165
Finance leases1
 2
 1
 
 4
Purchase commitments –         
Capital1,502
 2,891
 2,927
   7,320
Fuel959
 1,226
 465
 808
 3,458
Purchased power35
 75
 77
 446
 633
Other39
 81
 62
 243
 425
ARO settlements200
 501
 749
   1,450
Pension and other postretirement benefit plans14
 28
     42
Alabama Power total$3,421
 $6,657
 $5,214
 $13,439
 $28,731

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$1,014
 $906
 $628
 $9,236
 $11,784
Interest384
 715
 668
 5,070
 6,837
Financial derivative obligations49
 21
 
 
 70
Operating leases205
 395
 359
 831
 1,790
Finance leases28
 49
 50
 134
 261
Purchase commitments –         
Capital3,805
 6,080
 4,966
   14,851
Fuel1,091
 1,401
 629
 3,610
 6,731
Purchased power56
 117
 123
 862
 1,158
Other117
 121
 133
 205
 576
ARO settlements265
 680
 1,006
   1,951
Nuclear decommissioning trust5
 9
 9
 65
 88
Pension and other postretirement benefit plans50
 93
     143
Georgia Power total$7,069
 $10,587
 $8,571
 $20,013
 $46,240
Mississippi Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$282
 $270
 $
 $1,026
 $1,578
Interest68
 102
 83
 542
 795
Financial derivative obligations15
 11
 1
 
 27
Operating leases2
 2
 1
 2
 7
Purchase commitments –         
Capital255
 397
 402
   1,054
Fuel313
 312
 169
 108
 902
Purchased power17
 36
 37
 417
 507
Other28
 58
 69
 230
 385
ARO settlements23
 53
 44
   120
Pension and other postretirement benefits plans7
 14
     21
Mississippi Power total$1,010
 $1,255
 $806
 $2,325
 $5,396
Southern Power2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$825
 $977
 $290
 $2,339
 $4,431
Interest163
 278
 222
 1,302
 1,965
Financial derivative obligations3
 
 
 
 3
Operating leases29
 50
 52
 888
 1,019
Purchase commitments –         
Capital251
 306
 294
   851
Fuel424
 552
 265
 20
 1,261
Purchased power42
 42
 
 
 84
Other159
 296
 239
 1,481
 2,175
Southern Power total$1,896
 $2,501
 $1,362
 $6,030
 $11,789

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas2020 2021-2022 2023-2024 After 2024 Total
 (in millions)
Long-term debt –         
Principal$
 $376
 $400
 $4,659
 $5,435
Interest235
 458
 425
 3,213
 4,331
Financial derivative obligations369
 161
 66
 
 596
Operating leases18
 31
 21
 44
 114
Pipeline charges, storage capacity, and gas supply725
 1,085
 784
 1,677
 4,271
Purchase commitments –        

Capital1,775
 3,191
 3,335
   8,301
Other31
 14
 1
 
 46
Pension and other postretirement benefit plans16
 29
     45
Southern Company Gas total$3,169
 $5,345
 $5,032
 $9,593
 $23,139
Additional information about these funding requirements is provided below:
Long-term debt – Represents scheduled maturities of long-term debt, as well as the related interest. All amounts are reflected based on final maturity dates.dates except for amounts related to Georgia Power's FFB borrowings. The final maturity date for Georgia Power's FFB borrowings is February 20, 2044; however, principal amortization is reflected beginning in February 2020. The interest amounts also include the effects of interest rate derivatives employed to manage interest rate risk and effects of foreign currency swaps employed to manage foreign currency exchange rate risk, as applicable. For Southern Company plansand Southern Power, debt principal includes a $5 million loss related to Southern Power's foreign currency hedge of €1.1 billion. The Registrants plan to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates as of January 1, 2017,at December 31, 2019, as reflected in the statements of capitalization. Fixed rates include, where applicable,capitalization for each Registrant. Long-term debt excludes finance lease amounts, which are shown separately. See Note 8 to the effects of interest rate derivatives employed to manage interest rate risk.financial statements for additional information.
(b)Includes
Financial derivative liabilities related to cash flow hedges of forecasted debt, as well as energy-related derivatives. For additional information, see Notes 1 and 10obligations – See Note 14 to the financial statements.statements for additional information.
(c)Preference stock does not mature; therefore,
Operating and finance leases – See Note 9 to the financial statements for additional information. Operating lease commitments may include certain land leases for facilities that may be subject to annual price escalation based on indices. Estimated lease payments for Southern Company and Alabama Power exclude amounts are providedcontingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $1 million for 2021, $2 million for 2022, $3 million for 2023, $4 million for 2024, and $85 million for after 2024. See Note 2 to the next five years only.financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information.
(d)Excludes a PPA accounted for as a lease, which is included in "Purchased power."
(e)The Company provides estimated
Purchase commitments – Capital – Estimated capital expenditures are provided for a five-year period, including capital expenditures associated with environmental regulations. These amounts exclude contractual purchase commitments for nuclear fuel, capital expenditures covered under long-term service agreements,LTSAs, and estimated capital expenditures for AROs, which are reflected in "Other.the "fuel," "other," and "ARO settlements" categories, respectively, where applicable. Estimated capital expenditures for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $0.5 billion for 2020, $0.2 billion for 2021, $0.3 billion for 2022, and $0.1 billion for 2023. See Note 2 to the financial statements under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information. Estimated capital expenditures for Southern Company and Southern Power exclude approximately $0.5 billion per year for 2020 through 2024 for Southern Power's planned expenditures for plant acquisitions and placeholder growth. At December 31, 2016,2019, significant purchase commitments were outstanding in connection with the Registrants' construction program.programs. See FUTURE EARNINGS POTENTIAL – "Environmental��� "Environmental Matters – Environmental Statutes" and Regulations""Construction Programs" herein and "Capital Requirements" herein for additional information.
(f)Includes
Purchase commitments – Fuel – Primarily includes commitments to purchase coal and(for the traditional electric operating companies), natural gas (for the traditional electric operating companies and Southern Power), and nuclear fuel (for Alabama Power and Georgia Power), as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the New York Mercantile ExchangeNYMEX future prices at December 31, 2016.2019.
(g)The
Purchase commitments – Purchased power – Represents estimated minimum obligations for various PPAs for the purchase of capacity and transmissionenergy, as well as, for Georgia Power, capacity payments related costs associated withto Plant Vogtle Units 1 and 2. Amounts exclude PPAs accounted for as leases, which are recovered throughreflected in the purchased power capacity clause. Energy costs associated with PPAs are recovered through the fuel clause. See Notes 3"operating leases" and 7 to the financial statements for additional information."finance leases" categories, where applicable.

COMBINED MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Estimated capacity payments for Southern Company and Alabama Power exclude amounts contingent upon approval by the Alabama PSC related to Alabama Power's September 6, 2019 CCN filing totaling $4 million for 2020, $7 million for 2021, $7 million for 2022, $8 million for 2023, $8 million for 2024, and $107 million for after 2024. See Note 2 to the financial statements under "Alabama Power – Petition for Certificate of Convenience and Necessity" for additional information. Mississippi Power's long-term PPAs are associated with solar facilities and only include an energy component. Southern Power's purchased power commitments will be resold under a third-party agreement at cost. See Note 3 to the financial statements under "Guarantees" for additional information.
(h)
Purchase commitments – OtherIncludes long-term service agreements andLTSAs (for all Registrants), contracts for the procurement of limestone. Long-term servicelimestone (for Alabama Power and Georgia Power), contractual environmental remediation liabilities (for Southern Company Gas), operation and maintenance agreements (for Southern Power), and transmission agreements (for Southern Power). LTSAs include price escalation based on inflation indices. Limestone costsSouthern Power's transmission commitments are recovered throughbased on the environmental cost recovery clause. See Note 3 to the financial statementsSouthern Company system's current tariff rate for additional information.point-to-point transmission.
(i)
Pension and other postretirement benefit plansThe Southern Company forecastssystem provides postretirement benefits to the majority of its employees and funds trusts to the extent required by PSCs, other applicable state regulatory agencies, or the FERC. The Registrants forecast contributions to thetheir pension and other postretirement benefit plans over a three-year period. The Company anticipatesRegistrants anticipate no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from corporate assets of the Company's corporate assets.applicable subsidiaries. See Note 211 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from corporate assets of the Company's corporate assets.applicable subsidiaries.
ARO settlements – Represents estimated costs for a five-year period associated with closing and monitoring ash ponds at the traditional electric operating companies in accordance with the CCR Rule and the related state rules, which are reflected in the applicable Registrants' ARO liabilities. Material expenditures in future years for ARO settlements also will be required for ash ponds, nuclear decommissioning (for Alabama Power and Georgia Power), and other liabilities reflected in the applicable Registrants' AROs. See Note 6 to the financial statements for additional information.
Preferred stock dividends – Represents preferred stock of Alabama Power. Preferred stock does not mature; therefore, amounts are provided for the next five years only.
Nuclear decommissioning trusts – As a result of NRC requirements, Alabama Power and Georgia Power have external trust funds for nuclear decommissioning costs. Based on its most recent site study completed in 2018, Alabama Power currently has no additional funding requirements. Alabama Power's next site study is expected to be conducted by 2023. Georgia Power's projections of nuclear decommissioning trust fund contributions for Plant Hatch and Plant Vogtle Units 1 and 2 are based on the 2019 ARP. See Note 6 to the financial statements under "Nuclear Decommissioning" for additional information.
Pipeline charges, storage capacity, and gas supply – Includes charges at Southern Company Gas recoverable through a natural gas cost recovery mechanism, or alternatively billed to Marketers selling retail natural gas, and demand charges associated with Sequent. The gas supply balance includes amounts for Nicor Gas and SouthStar gas commodity purchase commitments of 45 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2019 and valued at $84 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries, including SouthStar, in support of payment obligations.

Item 8.FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
INDEX TO 2019 FINANCIAL STATEMENTS
Page


MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual ReportTable of ContentsIndex to Financial Statements


Cautionary Statement Regarding Forward-Looking
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinions on the Financial Statements and Internal Control over Financial Reporting
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of The Company's 2016 Annual Report contains forward-looking statements. Forward-lookingSouthern Company and subsidiary companies (Southern Company) as of December 31, 2019 and 2018, the related consolidated statements include, among other things, statements concerning retail rates, customerof income, comprehensive income, stockholders' equity, and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projectionscash flows for the qualified pension plan and postretirement benefit plans contributions, financing activities, start and completion of construction projects, filings with state and federal regulatory authorities, impacteach of the PATH Act, federal income tax benefits, estimated salesthree years in the period ended December 31, 2019, and purchases under power sale and purchase agreements, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology suchthe related notes (collectively referred to as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative"financial statements"). We also have audited Southern Company's internal control over financial reporting as of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggestedDecember 31, 2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impactCommittee of recent and future federal and state regulatory changes, including environmental laws regulating emissions, discharges, and disposal to air, water, and land, and also changes in tax and other laws and regulations to which the Company is subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
the effects, extent, and timingSponsoring Organizations of the entryTreadway Commission (COSO).
In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of additional competitionSouthern Company as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the marketsperiod ended December 31, 2019, in whichconformity with accounting principles generally accepted in the United States of America. Also, in our opinion, Southern Company operates;maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by COSO.
variationsBasis for Opinions
Southern Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in demand for electricity, including those relatingthe accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to weather,express an opinion on these financial statements and an opinion on Southern Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the general economyPublic Company Accounting Oversight Board (United States) (PCAOB) and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources such as self-generation and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of fuels;
effects of inflation;
the abilityare required to control costs and avoid cost overruns during the development and construction of facilities,be independent with respect to construct facilitiesSouthern Company in accordance with the requirements of permitsU.S. federal securities laws and licenses,the applicable rules and to satisfy any environmental performance standards;
investment performanceregulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.
Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.
Definition and Limitations of Internal Control over Financial Reporting
A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matters
The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the Audit Committee of Southern Company's employeeBoard of Directors and retiree benefit plans;that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.
advancesImpact of Rate Regulation on the Financial Statements – Refer to Note 1 (Summary of Significant Accounting Policies – Regulatory Assets and Liabilities) and Note 2 (Regulatory Matters) to the financial statements
Critical Audit Matter Description
Southern Company's traditional electric operating companies and natural gas distribution utilities (the "regulated utility subsidiaries"), which represent approximately 87% of Southern Company's consolidated operating revenues for the year ended December 31, 2019 and 84% of its consolidated total assets at December 31, 2019, are subject to rate regulation by their respective state Public Service Commissions or other applicable state regulatory agencies and wholesale regulation by the Federal Energy Regulatory Commission (the "Commissions"). Management has determined that the regulated utility subsidiaries meet the requirements under accounting principles generally accepted in technology;the United States of America to utilize specialized rules to account for the effects of rate regulation in the preparation of its financial statements. Accounting for the economics of rate regulation impacts multiple financial statement line items and disclosures, including, but not limited to, property, plant, and equipment; other regulatory assets; other regulatory liabilities; other cost of removal obligations; deferred charges and credits related to income taxes; under and over recovered regulatory clause revenues; operating revenues; operations and maintenance expenses; and depreciation.
stateThe Commissions set the rates the regulated utility subsidiaries are permitted to charge customers based on allowable costs, including a reasonable return on equity. Rates are determined and federalapproved in regulatory proceedings based on an analysis of the applicable regulated subsidiary's costs to provide utility service and a return on, and recovery of, its investment in the utility business. Current and future regulatory decisions can have an impact on the recovery of costs, the rate regulationsof return earned on investments, and the timing and amount of assets to be recovered by rates. The Commissions' regulation of rates is premised on the full recovery of prudently incurred costs and a reasonable rate of return on invested capital. While Southern Company's regulated utility subsidiaries expect to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve: (1) full recovery of the costs of providing utility service, or (2) full recovery of all amounts invested in the utility business and a reasonable return on that investment.
We identified the impact of pendingrate regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impacted account balances and disclosures (e.g., asset retirement costs, property damage reserves, and net book value of retired assets) and the high degree of subjectivity involved in assessing the potential impact of future regulatory orders on the financial statements. Management judgments include assessing the likelihood of (1) recovery in future rates of incurred costs, (2) a disallowance of part of the cost of recently completed plant or plant under construction, and/or (3) a refund to customers. Given that management's accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments required specialized knowledge of accounting for rate casesregulation and negotiations, includingthe rate actions relatingsetting process due to fuelits inherent complexities and significant auditor judgment to evaluate management estimates and the subjectivity of audit evidence.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:
We tested the effectiveness of management's controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We also tested the effectiveness of management's controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates or of a future reduction in rates.
We read relevant regulatory orders issued by the Commissions for the regulated utility subsidiaries, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other costpublicly available information to assess the likelihood of recovery mechanisms;
the ability to successfully operate generating, transmission, and distribution facilities and the successful performancein future rates or of necessary corporate functions;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to the Company;
the ability of counterpartiesa future reduction in rates based on precedence of the CompanyCommissions' treatment of similar costs under similar circumstances. We evaluated the external information and compared it to make payments asmanagement's recorded regulatory asset and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Company's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;
changes in the Company's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general;
the ability of the Company to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;liability balances for completeness.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Gulf Power Company 2016 Annual Report


For regulatory matters in process, we inspected filings with the directCommissions by both Southern Company's regulated utility subsidiaries and other interested parties that may impact the regulated utility subsidiaries' future rates for any evidence that might contradict management's assertions.
We evaluated regulatory filings for any evidence that intervenors are challenging full recovery of the cost of any capital projects. We tested selected costs included in the capitalized project costs for completeness and accuracy.
We obtained representation from management regarding probability of recovery for regulatory assets or indirect effects onrefund or future reduction in rates for regulatory liabilities to assess management's assertion that amounts are probable of recovery, refund, or a future reduction in rates.
We evaluated Southern Company's disclosures related to the impacts of rate regulation, including the balances recorded and regulatory developments.
Disclosure of Uncertainties – Plant Vogtle Units 3 and 4 Construction – Refer to Note 2 (Regulatory Matters – Georgia Power – Nuclear Construction) to the financial statements
Critical Audit Matter Description
As discussed in Note 2 to the financial statements, the ultimate recovery of Georgia Power Company's business resulting from incidents affecting(Georgia Power) investment in the U.S. electric grid or operationconstruction of generating resources;
Plant Vogtle Units 3 and 4 is subject to multiple uncertainties. Such uncertainties include the effectpotential impact of accounting pronouncements issued periodicallyfuture decisions by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (includingGeorgia Power's regulators (particularly the Form 10-K) filedGeorgia Public Service Commission), actions by the co-owners of the Vogtle project, and litigation or other legal proceedings involving the project. In addition, Georgia Power's ability to meet its cost and schedule forecasts could impact its capacity to fully recover its investment in the project. While the project is not subject to a cost cap, Georgia Power's cost and schedule forecasts are subject to numerous uncertainties which could impact cost recovery, including challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues that could arise and change the projected schedule and estimated cost. The ultimate recovery of Georgia Power's investment in Plant Vogtle Units 3 and 4 is subject to the outcome of future assessments by management as well as Georgia Public Service Commission decisions in future regulatory proceedings.
Management has disclosed the status, risks, and uncertainties associated with Plant Vogtle Units 3 and 4, including (1) the status of construction; (2) challenges to the achievement of Georgia Power's cost and schedule forecasts; (3) the status of regulatory proceedings; (4) the status of legal actions or issues involving the co-owners of the project; and (5) other matters which could impact the ultimate recoverability of Georgia Power's investment in the project. We identified as a critical audit matter the evaluation of these disclosures which involved significant audit effort requiring specialized industry and construction expertise, extensive knowledge of rate regulation, and difficult and subjective judgments.
How the Critical Audit Matter Was Addressed in the Audit
Our audit procedures related to the disclosure of the status, risks, and uncertainties of the nuclear construction at Plant Vogtle Units 3 and 4 included the following, among others:
We tested the effectiveness of internal controls over the on-going evaluation and monitoring of the construction schedule and capital cost forecast and over the disclosure of matters related to the construction and ultimate cost recovery of Plant Vogtle Units 3 and 4.
We involved construction specialists to assist in our evaluation of Georgia Power's processes for on-going evaluation and monitoring of the construction schedule and cost forecast and to assess the disclosures of challenges to the achievement of such forecasts.
We attended meetings with Georgia Power and Southern Company from timeofficials, project managers (including contractors), independent regulatory monitors, and co-owners of the project to time withevaluate and monitor construction status and identify cost and schedule challenges.
We read reports of external independent monitors employed by the SEC.Georgia Public Service Commission to monitor the status of construction at Plant Vogtle Units 3 and 4 to evaluate the completeness of Georgia Power's disclosure of challenges to the achievement of cost and schedule forecasts.
The Company expressly disclaims any obligation to update any forward-looking statements.



We inquired of Georgia Power and Southern Company officials and project managers regarding the status of construction, the construction schedule, and cost forecasts to assess the financial statement disclosures with respect to project status and potential risks and uncertainties to the achievement of such forecasts.
We inspected regulatory filings and transcripts of Georgia Public Service Commission hearings regarding the construction of Plant Vogtle Units 3 and 4 to identify potential challenges to the recovery of Georgia Power's construction costs and to evaluate the disclosures with respect to such uncertainties.
We inquired of Georgia Power and Southern Company management and internal and external legal counsel regarding any potential legal actions or issues arising from project construction or issues involving the co-owners of the project.
We compared the financial statement disclosures relating to this matter to the information gathered through the conduct of all our procedures to evaluate whether there were omissions relating to significant facts or uncertainties regarding the status of construction or other factors which could impact the ultimate cost recovery of Plant Vogtle Units 3 and 4.
We obtained representation from management regarding disclosure of all matters related to the cost and/or status, including matters related to a co-owner or regulatory development, that could result in a potential disallowance of costs related to the construction of Plant Vogtle Units 3 and 4.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company's auditor since 2002.

CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 20162019, 20152018, and 20142017
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report

2016
 2015
 2014
2019 2018 2017
(in millions)(in millions)
Operating Revenues:          
Retail revenues$1,281
 $1,249
 $1,267
Wholesale revenues, non-affiliates61
 107
 129
Wholesale revenues, affiliates75
 58
 130
Retail electric revenues$14,084
 $15,222
 $15,330
Wholesale electric revenues2,152
 2,516
 2,426
Other electric revenues636
 664
 681
Natural gas revenues3,792
 3,854
 3,791
Other revenues68
 69
 64
755
 1,239
 803
Total operating revenues1,485
 1,483
 1,590
21,419
 23,495
 23,031
Operating Expenses:          
Fuel432
 445
 605
3,622
 4,637
 4,400
Purchased power, non-affiliates126
 100
 82
Purchased power, affiliates16
 35
 25
Purchased power816
 971
 863
Cost of natural gas1,319
 1,539
 1,601
Cost of other sales435
 806
 513
Other operations and maintenance336
 354
 341
5,600
 5,889
 5,739
Depreciation and amortization172
 141
 145
3,038
 3,131
 3,010
Taxes other than income taxes120
 118
 111
1,230
 1,315
 1,250
Estimated loss on plants under construction24
 1,097
 3,362
Impairment charges168
 210
 
(Gain) loss on dispositions, net(2,569) (291) (40)
Total operating expenses1,202
 1,193
 1,309
13,683
 19,304
 20,698
Operating Income283
 290
 281
7,736
 4,191
 2,333
Other Income and (Expense):          
Allowance for equity funds used during construction128
 138
 160
Earnings from equity method investments162
 148
 106
Interest expense, net of amounts capitalized(47) (49) (53)(1,736) (1,842) (1,694)
Other income (expense), net(5) 8
 9
252
 114
 163
Total other income and (expense)(52) (41) (44)(1,194) (1,442) (1,265)
Earnings Before Income Taxes231
 249
 237
6,542
 2,749
 1,068
Income taxes91
 92
 88
1,798
 449
 142
Net Income140
 157
 149
Dividends on Preference Stock9
 9
 9
Net Income After Dividends on Preference Stock$131
 $148
 $140
Consolidated Net Income4,744
 2,300
 926
Dividends on preferred and preference stock of subsidiaries15
 16
 38
Net income (loss) attributable to noncontrolling interests(10) 58
 46
Consolidated Net Income Attributable to Southern Company$4,739
 $2,226
 $842
Common Stock Data:     
Earnings per share —     
Basic$4.53
 $2.18
 $0.84
Diluted4.50
 2.17
 0.84
Average number of shares of common stock outstanding — (in millions)     
Basic1,046
 1,020
 1,000
Diluted1,054
 1,025
 1,008
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 20162019, 20152018, and 20142017
Gulf PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report
 
2016
 2015
 2014
2019 2018 2017
(in millions)(in millions)
Net Income$140
 $157
 $149
Consolidated Net Income$4,744
 $2,300
 $926
Other comprehensive income (loss):          
Qualifying hedges:          
Changes in fair value, net of tax of $-, $-, and $-, respectively1
 1
 
Changes in fair value, net of tax of $(39), $(16), and $34, respectively(115) (47) 57
Reclassification adjustment for amounts included in net income,
net of tax of $19, $24, and $(37), respectively
57
 72
 (60)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(31), $(2), and $6, respectively(64) (5) 17
Reclassification adjustment for amounts included in net income,
net of tax of $1, $5, and $(6), respectively
4
 6
 (23)
Total other comprehensive income (loss)1
 1
 
(118) 26
 (9)
Comprehensive Income$141
 $158
 $149
Dividends on preferred and preference stock of subsidiaries15
 16
 38
Comprehensive income (loss) attributable to noncontrolling interests(10) 58
 46
Consolidated Comprehensive Income Attributable to Southern Company$4,621
 $2,252
 $833
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Consolidated net income$4,744
 $2,300
 $926
Adjustments to reconcile consolidated net income
to net cash provided from operating activities —
     
Depreciation and amortization, total3,331
 3,549
 3,457
Deferred income taxes611
 89
 166
Utilization of federal investment tax credits757
 5
 
Allowance for equity funds used during construction(128) (138) (160)
Pension, postretirement, and other employee benefits(204) (103) (84)
Pension and postretirement funding(1,136) (4) (2)
Settlement of asset retirement obligations(328) (244) (177)
Storm damage reserve accruals168
 74
 38
Stock based compensation expense107
 125
 109
Estimated loss on plants under construction15
 1,093
 3,179
Impairment charges168
 210
 
(Gain) loss on dispositions, net(2,588) (301) (42)
Other, net102
 14
 (63)
Changes in certain current assets and liabilities —     
-Receivables630
 (426) (202)
-Fossil fuel for generation(120) 123
 36
-Natural gas for sale44
 49
 36
-Other current assets70
 (127) (143)
-Accounts payable(693) 291
 (280)
-Accrued taxes117
 267
 (142)
-Accrued compensation(9) 33
 (8)
-Retail fuel cost over recovery62
 36
 (212)
-Other current liabilities61
 30
 (38)
Net cash provided from operating activities5,781
 6,945
 6,394
Investing Activities:     
Business acquisitions, net of cash acquired(50) (65) (1,054)
Property additions(7,555) (8,001) (7,423)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion               
 
 1,682
Nuclear decommissioning trust fund purchases(888) (1,117) (811)
Nuclear decommissioning trust fund sales882
 1,111
 805
Proceeds from dispositions and asset sales5,122
 2,956
 97
Cost of removal, net of salvage(393) (388) (313)
Change in construction payables, net(169) 50
 259
Investments in unconsolidated subsidiaries(148) (114) (152)
Payments pursuant to LTSAs(234) (186) (227)
Other investing activities41
 (6) (53)
Net cash used for investing activities(3,392) (5,760) (7,190)
Financing Activities:     
Increase (decrease) in notes payable, net640
 (774) (401)
Proceeds —     
Long-term debt5,220
 2,478
 5,858
Common stock844
 1,090
 793
Preferred stock
 
 250
Short-term borrowings350
 3,150
 1,259
Redemptions and repurchases —     
Long-term debt(4,347) (5,533) (2,930)
Preferred and preference stock
 (33) (658)
Short-term borrowings(1,850) (1,900) (659)
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Payment of common stock dividends(2,570) (2,425) (2,300)
Other financing activities(157) (264) (222)
Net cash provided from (used for) financing activities(1,930) (1,813) 951
Net Change in Cash, Cash Equivalents, and Restricted Cash459
 (628) 155
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year1,519
 2,147
 1,992
Cash, Cash Equivalents, and Restricted Cash at End of Year$1,978
 $1,519
 $2,147
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $74, $72, and $89 capitalized, respectively)$1,651
 $1,794
 $1,676
Income taxes (net of refunds)276
 172
 (410)
Noncash transactions — Accrued property additions at year-end932
 1,103
 985
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$1,975
 $1,396
Receivables —   
Customer accounts receivable1,614
 1,726
Energy marketing receivable428
 801
Unbilled revenues599
 654
Under recovered fuel clause revenues
 115
Other accounts and notes receivable817
 813
Accumulated provision for uncollectible accounts(49) (50)
Materials and supplies1,388
 1,465
Fossil fuel for generation521
 405
Natural gas for sale479
 524
Prepaid expenses314
 432
Assets from risk management activities, net of collateral183
 222
Regulatory assets – asset retirement obligations287
 
Other regulatory assets885
 525
Assets held for sale188
 393
Other current assets188
 162
Total current assets9,817
 9,583
Property, Plant, and Equipment:   
In service105,114
 103,706
Less: Accumulated depreciation30,765
 31,038
Plant in service, net of depreciation74,349
 72,668
Nuclear fuel, at amortized cost851
 875
Construction work in progress7,880
 7,254
Total property, plant, and equipment83,080
 80,797
Other Property and Investments:   
Goodwill5,280

5,315
Equity investments in unconsolidated subsidiaries1,303

1,580
Other intangible assets, net of amortization of $280 and $235
at December 31, 2019 and December 31, 2018, respectively
536
 613
Nuclear decommissioning trusts, at fair value2,036
 1,721
Leveraged leases788
 798
Miscellaneous property and investments391
 269
Total other property and investments10,334
 10,296
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization1,800
 
Deferred charges related to income taxes798
 794
Unamortized loss on reacquired debt300
 323
Regulatory assets – asset retirement obligations, deferred4,094
 2,933
Other regulatory assets, deferred6,805
 5,375
Assets held for sale, deferred601
 5,350
Other deferred charges and assets1,071
 1,463
Total deferred charges and other assets15,469
 16,238
Total Assets$118,700
 $116,914
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$2,989
 $3,198
Notes payable2,055
 2,915
Energy marketing trade payables442
 856
Accounts payable2,115
 2,580
Customer deposits496
 522
Accrued taxes —   
Accrued income taxes
 21
Other accrued taxes659
 635
Accrued interest474
 472
Accrued compensation992
 1,030
Asset retirement obligations504
 404
Other regulatory liabilities756
 376
Liabilities held for sale5
 425
Operating lease obligations229
 
Other current liabilities830
 852
Total current liabilities12,546
 14,286
Long-Term Debt (See accompanying statements)
41,798
 40,736
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes7,888
 6,558
Deferred credits related to income taxes6,078
 6,460
Accumulated deferred ITCs2,291
 2,372
Employee benefit obligations1,814
 2,147
Operating lease obligations, deferred1,615
 
Asset retirement obligations, deferred9,282
 8,990
Accrued environmental remediation234
 268
Other cost of removal obligations2,239
 2,297
Other regulatory liabilities, deferred256
 169
Liabilities held for sale, deferred
 2,836
Other deferred credits and liabilities609
 465
Total deferred credits and other liabilities32,306
 32,562
Total Liabilities86,650
 87,584
Redeemable Preferred Stock of Subsidiaries (See accompanying statements)
291
 291
Total Stockholders' Equity (See accompanying statements)
31,759
 29,039
Total Liabilities and Stockholders' Equity$118,700
 $116,914
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term debt payable to affiliated trusts —     
Variable rate due 20425.20%$206
$206
  
Long-term senior notes and debt —     
Maturity     
2019
2,948
  
20202.43%2,100
2,271
  
20212.70%2,672
2,638
  
20222.53%1,870
1,983
  
20233.05%2,290
2,290
  
20242.20%400

  
2025 through 20494.27%20,120
19,895
  
Variable rate due 20202.50%800
1,875
  
Variable rate due 20212.42%125
125
  
Total long-term senior notes and debt 30,377
34,025
  
Other long-term debt —     
Pollution control revenue bonds —     
Maturity     
2019
25
  
20222.35%53
90
  
2023
33
  
2025 through 20532.40%1,466
1,112
  
Variable rate due 20201.80%7
148
  
Variable rate due 20211.75%65
65
  
Variable rate due 2022
4
  
Variable rate due 20241.72%21
21
  
Variable rate due 2025 to 20521.69%1,351
1,396
  
Plant Daniel revenue bonds due 20217.13%270
270
  
FFB loans —     
Maturity     
20203.20%64
44
  
20213.20%64
44
  
20223.20%64
44
  
20233.20%64
44
  
20243.20%64
44
  
2025 to 20443.20%3,523
2,405
  
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026 to 20593.94%1,525
1,225
  
Junior subordinated notes due 20242.70%863

  
Junior subordinated notes due 2027 to 20775.00%4,433
3,570
  
Total other long-term debt 13,947
10,684
  
Unamortized fair value adjustment of long-term debt 430
474
  
Finance lease obligations 226
197
  
Unamortized debt premium (discount), net (152)(158)  
Unamortized debt issuance expense (247)(208)  
Total long-term debt44,787
45,220
  
Less:     
Amount due within one year 2,989
3,198
  
Amount held for sale 
1,286
  
Long-term debt excluding amounts due within one year and held for sale 41,798
40,736
56.6%58.1%
      

CONSOLIDATED STATEMENTS OF CAPITALIZATION (continued)
At December 31, 2019 and 2018
Southern Company and Subsidiary Companies 2019 Annual Report
    
  2019201820192018
  (in millions)(percent of total)
Redeemable Preferred Stock of Subsidiaries:     
Cumulative preferred stock     
$100 par or stated value — 4.20% to 4.92%     
Authorized — 10 million shares     
Outstanding — 475,115 shares 48
48
  
$1 par value — 5.00%     
Authorized — 28 million shares     
Outstanding — 10 million shares 243
243
  
Total redeemable preferred stock of subsidiaries
 



  
(annual dividend requirement — $15 million) 291
291
0.4
0.4
Common Stockholders' Equity:     
Common stock, par value $5 per share — 5,257
5,164
  
Authorized — 1.5 billion shares     
Issued — 2019: 1.1 billion shares     
  — 2018: 1.0 billion shares     
Treasury — 2019: 1.0 million shares     
      — 2018: 1.0 million shares     
Paid-in capital 11,734
11,094
  
Treasury, at cost (42)(38)  
Retained earnings 10,877
8,706
  
Accumulated other comprehensive loss (321)(203)  
Total common stockholders' equity 27,505
24,723
37.2
35.3
Noncontrolling interests 4,254
4,316
5.8
6.2
Total stockholders' equity 31,759
29,039
  
Total Capitalization $73,848
$70,066
100.0%100.0%

The accompanying notes are an integral part of these consolidated financial statements. 

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Company and Subsidiary Companies 2019 Annual Report
 Southern Company Common Stockholders' Equity     
 Number of Common Shares Common Stock   
Accumulated
Other
Comprehensive Income
(Loss)
 
Preferred
and Preference Stock of Subsidiaries
 
Noncontrolling
Interests(a)
 
 Issued Treasury Par Value Paid-In Capital Treasury Retained Earnings   Total
 (in millions)
Balance at December 31, 2016991
 (1) $4,952
 $9,661
 $(31) $10,356
 $(180) $609
 $1,245
$26,612
Consolidated net income attributable
   to Southern Company

 
 
 
 
 842
 
 
 
842
Other comprehensive income (loss)
 
 
 
 
 
 (9) 
 
(9)
Stock issued18
 
 86
 707
 
 
 
 
 
793
Stock-based compensation
 
 
 105
 
 
 
 
 
105
Cash dividends of $2.3000 per share
 
 
 
 
 (2,300) 
 
 
(2,300)
Preferred and preference stock
   redemptions

 
 
 
 
 
 
 (609) 
(609)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 79
79
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (122)(122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 44
44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 
 
 114
114
Other
 
 
 (4) (5) (13) 
 
 1
(21)
Balance at December 31, 20171,009
 (1) 5,038
 10,469
 (36) 8,885
 (189) 
 1,361
25,528
Consolidated net income attributable
   to Southern Company

 
 
 
 
 2,226
 
 
 
2,226
Other comprehensive income
 
 
 
 
 
 26
 
 
26
Stock issued26
 
 126
 964
 
 
 
 
 
1,090
Stock-based compensation
 
 
 84
 
 
 
 
 
84
Cash dividends of $2.3800 per share
 
 
 
 
 (2,425) 
 
 
(2,425)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 1,372
1,372
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (164)(164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 58
58
Sale of noncontrolling interests
 
 
 (417) 
 
 
 
 1,690
1,273
Other
 
 
 (6) (2) 20
 (40) 
 (1)(29)
Balance at December 31, 20181,035
 (1) 5,164
 11,094
 (38) 8,706
 (203) 
 4,316
29,039
Consolidated net income attributable
   to Southern Company

 
 
 
 
 4,739
 
 
 
4,739
Other comprehensive income (loss)
 
 
 
 
 
 (118) 
 
(118)
Issuance of equity units(b)

 
 
 (198) 
 
 
 
 
(198)
Stock issued19
 
 93
 751
 
 
 
 
 
844
Stock-based compensation
 
 
 66
 
 
 
 
 
66
Cash dividends of $2.4600 per share
 
 
 
 
 (2,570) 
 
 
(2,570)
Contributions from
   noncontrolling interests

 
 
 
 
 
 
 
 276
276
Distributions to
   noncontrolling interests

 
 
 
 
 
 
 
 (327)(327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 
 
 (10)(10)
Other
 
 
 21
 (4) 2
 
 
 (1)18
Balance at December 31, 20191,054
 (1) $5,257
 $11,734
 $(42) $10,877
 $(321) $
 $4,254
$31,759
(a)
Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Southern PowerRedeemable Noncontrolling Interests" for additional information.
(b)
See Note 8 under "Equity Units" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Alabama Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Alabama Power's management. Our responsibility is to express an opinion on Alabama Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Alabama Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Alabama Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Alabama Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2020
We have served as Alabama Power's auditor since 2002.

STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Alabama Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$5,501
 $5,367
 $5,458
Wholesale revenues, non-affiliates258
 279
 276
Wholesale revenues, affiliates81
 119
 97
Other revenues285
 267
 208
Total operating revenues6,125
 6,032
 6,039
Operating Expenses:     
Fuel1,112
 1,301
 1,225
Purchased power, non-affiliates203
 216
 170
Purchased power, affiliates200
 216
 158
Other operations and maintenance1,821
 1,669
 1,709
Depreciation and amortization793
 764
 736
Taxes other than income taxes403
 389
 384
Total operating expenses4,532
 4,555
 4,382
Operating Income1,593
 1,477
 1,657
Other Income and (Expense):     
Allowance for equity funds used during construction52
 62
 39
Interest expense, net of amounts capitalized(336) (323) (305)
Other income (expense), net46
 20
 43
Total other income and (expense)(238) (241) (223)
Earnings Before Income Taxes1,355
 1,236
 1,434
Income taxes270
 291
 568
Net Income1,085
 945
 866
Dividends on Preferred and Preference Stock15
 15
 18
Net Income After Dividends on Preferred and Preference Stock$1,070
 $930
 $848
The accompanying notes are an integral part of these financial statements.



STATEMENTS OF CASH FLOWSCOMPREHENSIVE INCOME
For the Years Ended December 31, 20162019, 20152018, and 20142017
GulfAlabama Power Company 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Activities:     
Net income$140
 $157
 $149
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total179
 152
 153
Deferred income taxes57
 90
 65
Pension and postretirement funding(48) 
 (30)
Other, net(3) 4
 (4)
Changes in certain current assets and liabilities —     
-Receivables15
 33
 (17)
-Fossil fuel stock37
 (6) 34
-Prepaid income taxes(11) 32
 (19)
-Other current assets(1) (2) (2)
-Accounts payable5
 (22) 8
-Over recovered regulatory clause revenues1
 22
 
-Other current liabilities8
 
 7
Net cash provided from operating activities379
 460
 344
Investing Activities:     
Property additions(178) (235) (348)
Cost of removal net of salvage(9) (10) (13)
Change in construction payables13
 (28) 12
Payments pursuant to long-term service agreements(5) (8) (8)
Other investing activities(1) 
 (1)
Net cash used for investing activities(180) (281) (358)
Financing Activities:     
Increase (decrease) in notes payable, net126
 32
 (26)
Proceeds —     
Common stock issued to parent
 20
 50
Capital contributions from parent company20
 4
 4
Pollution control revenue bonds
 13
 42
Senior notes
 
 200
Redemptions and repurchases —     
Senior notes(235) (60) (75)
Pollution control revenue bonds
 (13) (29)
Payment of common stock dividends(120) (130) (123)
Other financing activities(8) (10) (12)
Net cash provided from (used for) financing activities(217) (144) 31
Net Change in Cash and Cash Equivalents(18) 35
 17
Cash and Cash Equivalents at Beginning of Year74
 39
 22
Cash and Cash Equivalents at End of Year$56
 $74
 $39
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $-, $6, and $5 capitalized, respectively)$53
 $52
 $48
Income taxes (net of refunds)21
 (7) 44
Noncash transactions — accrued property additions at year-end33
 20
 42
The accompanying notes are an integral part of these financial statements.


BALANCE SHEETS
At December 31, 2016 and 2015
Gulf Power Company 20162019 Annual Report

Assets2016
 2015
 (in millions)
Current Assets:   
Cash and cash equivalents$56
 $74
Receivables —   
Customer accounts receivable72
 76
Unbilled revenues55
 54
Under recovered regulatory clause revenues17
 20
Income taxes receivable, current
 27
Other accounts and notes receivable6
 9
Affiliated17
 1
Accumulated provision for uncollectible accounts(1) (1)
Fossil fuel stock71
 108
Materials and supplies55
 56
Prepaid expenses18
 8
Other regulatory assets, current44
 90
Other current assets12
 14
Total current assets422
 536
Property, Plant, and Equipment:   
In service5,140
 5,045
Less accumulated provision for depreciation1,382
 1,296
Plant in service, net of depreciation3,758
 3,749
Other utility plant, net
 62
Construction work in progress51
 48
Total property, plant, and equipment3,809
 3,859
Deferred Charges and Other Assets:   
Deferred charges related to income taxes58
 61
Other regulatory assets, deferred512
 427
Other deferred charges and assets21
 37
Total deferred charges and other assets591
 525
Total Assets$4,822
 $4,920
 2019 2018 2017
 (in millions)
Net Income$1,085
 $945
 $866
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $-, and $(1), respectively
 
 1
Reclassification adjustment for amounts included in net income,
net of tax of $2, $2, and $2, respectively
4
 4
 3
Total other comprehensive income (loss)4
 4
 4
Comprehensive Income$1,089
 $949
 $870
The accompanying notes are an integral part of these financial statements.
 



STATEMENTS OF CASH FLOWS
BALANCE SHEETS
At For the Years Ended December 31, 20162019, 2018, and 20152017
GulfAlabama Power Company 20162019 Annual Report
Liabilities and Stockholder's Equity2016
 2015
 (in millions)
Current Liabilities:   
Securities due within one year$87
 $110
Notes payable268
 142
Accounts payable —   
Affiliated59
 55
Other54
 44
Customer deposits35
 36
Accrued taxes —   
Accrued income taxes1
 4
Other accrued taxes19
 9
Accrued interest8
 9
Accrued compensation40
 36
Deferred capacity expense, current22
 22
Other regulatory liabilities, current16
 22
Liabilities from risk management activities9
 49
Other current liabilities31
 29
Total current liabilities649
 567
Long-Term Debt (See accompanying statements)
987
 1,193
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes948
 893
Employee benefit obligations96
 129
Deferred capacity expense119
 141
Asset retirement obligations120
 113
Other cost of removal obligations249
 233
Other regulatory liabilities, deferred47
 47
Other deferred credits and liabilities71
 102
Total deferred credits and other liabilities1,650
 1,658
Total Liabilities3,286
 3,418
Preference Stock (See accompanying statements)
147
 147
Common Stockholder's Equity (See accompanying statements)
1,389
 1,355
Total Liabilities and Stockholder's Equity$4,822
 $4,920
Commitments and Contingent Matters (See notes)

 
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$1,085
 $945
 $866
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total951
 917
 888
Deferred income taxes197
 174
 409
Allowance for equity funds used during construction(52) (62) (39)
Pension and postretirement funding(362) (4) (2)
Settlement of asset retirement obligations(127) (55) (26)
Natural disaster reserve accruals138
 16
 4
Other deferred charges – affiliated(42) 
 
Other, net(90) (17) 9
Changes in certain current assets and liabilities —     
-Receivables9
 (149) (168)
-Prepayments(4) (2) (2)
-Materials and supplies23
 (82) (34)
-Other current assets(85) 30
 20
-Accounts payable(41) 24
 71
-Accrued taxes49
 10
 (84)
-Accrued compensation(14) 8
 (2)
-Retail fuel cost over recovery47
 
 (76)
-Other current liabilities97
 128
 3
Net cash provided from operating activities1,779
 1,881
 1,837
Investing Activities:     
Property additions(1,757) (2,158) (1,882)
Nuclear decommissioning trust fund purchases(261) (279) (237)
Nuclear decommissioning trust fund sales260
 278
 237
Cost of removal net of salvage(103) (130) (112)
Change in construction payables(71) 26
 161
Other investing activities(31) (26) (43)
Net cash used for investing activities(1,963) (2,289) (1,876)
Financing Activities:     
Proceeds —     
Senior notes600
 500
 1,100
Preferred stock
 
 250
Pollution control revenue bonds
 120
 
Capital contributions from parent company1,240
 511
 361
Redemptions and repurchases —     
Senior notes(200) 
 (525)
Preferred and preference stock
 
 (238)
Pollution control revenue bonds
 (120) (36)
Payment of common stock dividends(844) (801) (714)
Other financing activities(31) (33) (35)
Net cash provided from financing activities765
 177
 163
Net Change in Cash, Cash Equivalents, and Restricted Cash581
 (231) 124
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year313
 544
 420
Cash, Cash Equivalents, and Restricted Cash at End of Year$894
 $313
 $544
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $19, $22, and $15 capitalized, respectively)$311
 $284
 $285
Income taxes (net of refunds)26
 106
 236
Noncash transactions — Accrued property additions at year-end200
 272
 245
The accompanying notes are an integral part of these financial statements.


STATEMENTS OF CAPITALIZATIONBALANCE SHEETS
At December 31, 20162019 and 20152018
GulfAlabama Power Company 20162019 Annual Report
 
 2016
 2015
 2016
 2015
 (in millions) (percent of total)
Long-Term Debt:       
Long-term notes payable —       
5.30% due 2016$
 $110
    
2.93 to 5.90% due 201787
 85
    
4.75% due 2020175
 175
    
3.10% to 5.75% due 2022-2051515
 640
    
Total long-term notes payable777
 1,010
    
Other long-term debt —       
Pollution control revenue bonds —       
1.15% to 4.45% due 2022-2049227
 227
    
Variable rates (0.75% to 0.84% at 1/1/17) due 2022-204282
 82
    
Total other long-term debt309
 309
    
Unamortized debt discount(5) (8)    
Unamortized debt issuance expense(7) (8)    
Total long-term debt (annual interest requirement — $42 million)1,074
 1,303
    
Less amount due within one year87
 110
    
Long-term debt excluding amount due within one year987
 1,193
 39.1% 44.3%
Preferred and Preference Stock:       
Authorized — 20,000,000 shares — preferred stock       
— 10,000,000 shares — preference stock       
Outstanding — $100 par or stated value       
— 6% preference stock — 550,000 shares (non-cumulative)54
 54
    
— 6.45% preference stock — 450,000 shares (non-cumulative)44
 44
    
— 5.60% preference stock — 500,000 shares (non-cumulative)49
 49
    
Total preference stock (annual dividend requirement — $9 million)147
 147
 5.8
 5.4
Common Stockholder's Equity:       
Common stock, without par value —       
Authorized — 20,000,000 shares       
Outstanding — 5,642,717 shares503
 503
    
Paid-in capital589
 567
    
Retained earnings296
 285
    
Accumulated other comprehensive loss1
 
    
Total common stockholder's equity1,389
 1,355
 55.1
 50.3
Total Capitalization$2,523
 $2,695
 100.0% 100.0%
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2016, 2015, and 2014
Gulf Power Company 2016 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20135
 $433
 $553
 $250
 $(1) $1,235
Net income after dividends on
preference stock

 
 
 140
 
 140
Issuance of common stock
 50
 
 
 
 50
Capital contributions from parent company
 
 7
 
 
 7
Cash dividends on common stock
 
 
 (123) 
 (123)
Balance at December 31, 20145
 483
 560
 267
 (1) 1,309
Net income after dividends on
preference stock

 
 
 148
 
 148
Issuance of common stock1
 20
 
 
 
 20
Capital contributions from parent company
 
 7
 
 
 7
Other comprehensive income (loss)
 
 
 
 1
 1
Cash dividends on common stock
 
 
 (130) 
 (130)
Balance at December 31, 20156
 503
 567
 285
 
 1,355
Net income after dividends on
preference stock

 
 
 131
 
 131
Capital contributions from parent company
 
 22
 
 
 22
Other comprehensive income (loss)
 
 
 
 1
 1
Cash dividends on common stock
 
 
 (120) 
 (120)
Balance at December 31, 20166
 $503
 $589
 $296
 $1
 $1,389
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$894
 $313
Receivables —   
Customer accounts receivable425
 403
Unbilled revenues134
 150
Affiliated37
 94
Other accounts and notes receivable72
 51
Accumulated provision for uncollectible accounts(22) (10)
Fossil fuel stock212
 141
Materials and supplies512
 546
Prepaid expenses50
 66
Other regulatory assets242
 137
Other current assets30
 18
Total current assets2,586
 1,909
Property, Plant, and Equipment:   
In service30,023
 30,402
Less: Accumulated provision for depreciation9,540
 9,988
Plant in service, net of depreciation20,483
 20,414
Nuclear fuel, at amortized cost296
 324
Construction work in progress890
 1,113
Total property, plant, and equipment21,669
 21,851
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries66
 65
Nuclear decommissioning trusts, at fair value1,023
 847
Miscellaneous property and investments128
 127
Total other property and investments1,217
 1,039
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization132
 
Deferred charges related to income taxes244
 240
Deferred under recovered regulatory clause revenues40
 116
Regulatory assets – asset retirement obligations1,019
 147
Other regulatory assets, deferred1,976
 1,240
Other deferred charges and assets269
 188
Total deferred charges and other assets3,680
 1,931
Total Assets$29,152
 $26,730
The accompanying notes are an integral part of these financial statements.
 




NOTES TO FINANCIAL STATEMENTSBALANCE SHEETS
GulfAt December 31, 2019 and 2018
Alabama Power Company 20162019 Annual Report
Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$251
 $201
Accounts payable —   
Affiliated316
 364
Other514
 614
Customer deposits100
 96
Accrued taxes78
 44
Accrued interest92
 89
Accrued compensation216
 227
Asset retirement obligations195
 163
Other regulatory liabilities193
 116
Other current liabilities105
 45
Total current liabilities2,060
 1,959
Long-Term Debt (See accompanying statements)
8,270
 7,923
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes3,260
 2,962
Deferred credits related to income taxes1,960
 2,027
Accumulated deferred ITCs100
 106
Employee benefit obligations206
 314
Operating lease obligations107
 
Asset retirement obligations, deferred3,345
 3,047
Other cost of removal obligations412
 497
Other regulatory liabilities, deferred146
 69
Other deferred credits and liabilities40
 58
Total deferred credits and other liabilities9,576
 9,080
Total Liabilities19,906
 18,962
Redeemable Preferred Stock (See accompanying statements)
291
 291
Common Stockholder's Equity (See accompanying statements)
8,955
 7,477
Total Liabilities and Stockholder's Equity$29,152
 $26,730
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.





Index to the Notes to Financial Statements



NOTES (continued)
GulfSTATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Alabama Power Company 20162019 Annual Report

1. SUMMARY
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term debt payable to affiliated trusts —     
Variable rate due 20425.20%$206
$206
  
Long-term notes payable —     
Maturity     
2019
200
  
20203.38%250
250
  
20213.81%220
220
  
20223.36%750
750
  
20233.55%300
300
  
2025-20494.41%5,775
5,175
  
Variable rate due 20212.90%25
25
  
Total long-term notes payable 7,320
6,920
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20342.46%207
207
  
Variable rate due 20211.75%65
65
  
Variable rate due 20241.72%21
21
  
Variable rate due 2028-20381.65%767
767
  
Total other long-term debt 1,060
1,060
  
Finance lease obligations 4
4
  
Unamortized debt premium (discount), net (14)(12)  
Unamortized debt issuance expense (55)(54)  
Total long-term debt 8,521
8,124
  
Less amount due within one year 251
201
  
Long-term debt excluding amount due within one year 8,270
7,923
47.2%50.4%
Redeemable Preferred Stock:     
Cumulative redeemable preferred stock     
$100 par or stated value — 4.20% to 4.92%     
Authorized — 3,850,000 shares     
Outstanding — 475,115 shares 48
48
  
$1 par value — 5.00%     
Authorized — 27,500,000 shares     
Outstanding — 10,000,000 shares: $25 stated value 243
243
  
Total redeemable preferred stock
(annual dividend requirement — $15 million)
 291
291
1.7
1.9
Common Stockholder's Equity:     
Common stock, par value $40 per share —     
Authorized — 40,000,000 shares     
Outstanding — 30,537,500 shares 1,222
1,222
  
Paid-in capital 4,755
3,508
  
Retained earnings 3,001
2,775
  
Accumulated other comprehensive loss (23)(28)  
Total common stockholder's equity 8,955
7,477
51.1
47.7
Total Capitalization $17,516
$15,691
100.0%100.0%
 The accompanying notes are an integral part of these financial statements.


STATEMENTS OF SIGNIFICANT ACCOUNTING POLICIESCOMMON STOCKHOLDER'S EQUITY
GeneralFor the Years Ended December 31, 2019, 2018, and 2017
GulfAlabama Power Company (the Company) is a2019 Annual Report

 
Number of
Common
Shares
Issued
 
Common
Stock
 
Paid-In
Capital
 
Retained
Earnings
 
Accumulated
Other
Comprehensive
Income (Loss)
 Total
 (in millions)
Balance at December 31, 201631
 $1,222
 $2,613
 $2,518
 $(30) $6,323
Net income after dividends on
preferred and preference stock

 
 
 848
 
 848
Capital contributions from parent company
 
 373
 
 
 373
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (714) 
 (714)
Other
 
 
 (5) 
 (5)
Balance at December 31, 201731
 1,222
 2,986
 2,647
 (26) 6,829
Net income after dividends on
preferred and preference stock

 
 
 930
 
 930
Capital contributions from parent company
 
 522
 
 
 522
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (801) 
 (801)
Other
 
 
 (1) (6) (7)
Balance at December 31, 201831
 1,222
 3,508
 2,775
 (28) 7,477
Net income after dividends on
preferred and preference stock

 
 
 1,070
 
 1,070
Capital contributions from parent company
 
 1,247
 
 
 1,247
Other comprehensive income
 
 
 
 4
 4
Cash dividends on common stock
 
 
 (844) 
 (844)
Other
 
 
 
 1
 1
Balance at December 31, 201931
 $1,222
 $4,755
 $3,001
 $(23) $8,955
The accompanying notes are an integral part of these financial statements.



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company, which isCompany) as of December 31, 2019 and 2018, the parent companyrelated statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Georgia Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Georgia Power's management. Our responsibility is to express an opinion on Georgia Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and three other traditional electric operating companies,are required to be independent with respect to Georgia Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Georgia Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Georgia Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as Southern Power, Southern Company Gas (asevaluating the overall presentation of July 1, 2016)the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Georgia Power's auditor since 2002.

STATEMENTS OF INCOME
For the Years Ended December 31, 2019, SCS, Southern LINC, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure (as of May 9, 2016), Inc. (PowerSecure)2018, and other direct and indirect subsidiaries. The traditional electric operating companies – the Company, Alabama Power, 2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$7,707
 $7,752
 $7,738
Wholesale revenues, non-affiliates129
 163
 163
Wholesale revenues, affiliates11
 24
 26
Other revenues561
 481
 383
Total operating revenues8,408
 8,420
 8,310
Operating Expenses:     
Fuel1,444
 1,698
 1,671
Purchased power, non-affiliates521
 430
 416
Purchased power, affiliates575
 723
 622
Other operations and maintenance1,972
 1,860
 1,724
Depreciation and amortization981
 923
 895
Taxes other than income taxes454
 437
 409
Estimated loss on Plant Vogtle Units 3 and 4
 1,060
 
Total operating expenses5,947
 7,131
 5,737
Operating Income2,461
 1,289
 2,573
Other Income and (Expense):     
Interest expense, net of amounts capitalized(409) (397) (419)
Other income (expense), net140
 115
 104
Total other income and (expense)(269) (282) (315)
Earnings Before Income Taxes2,192
 1,007
 2,258
Income taxes472
 214
 830
Net Income1,720
 793
 1,428
Dividends on Preferred and Preference Stock
 
 14
Net Income After Dividends on Preferred and Preference Stock$1,720
 $793
 $1,414
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$1,720
 $793
 $1,428
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(15), $-, and $-, respectively(44) 
 
Reclassification adjustment for amounts included in net income,
net of tax of $1, $1, and $1, respectively
2
 3
 3
Total other comprehensive income (loss)(42) 3
 3
Comprehensive Income$1,678
 $796
 $1,431
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$1,720
 $793
 $1,428
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total1,193
 1,142
 1,100
Deferred income taxes179
 (260) 458
Pension, postretirement, and other employee benefits(146) (75) (68)
Pension and postretirement funding(200) 
 
Settlement of asset retirement obligations(151) (116) (120)
Retail fuel cost over recovery – long-term73
 
 
Other deferred charges – affiliated(108) 
 
Estimated loss on Plant Vogtle Units 3 and 4
 1,060
 
Other, net12
 (21) (83)
Changes in certain current assets and liabilities —     
-Receivables177
 8
 (256)
-Fossil fuel stock(41) 83
 (16)
-Prepaid income taxes102
 152
 (168)
-Other current assets(19) (43) (28)
-Accounts payable(92) 95
 (219)
-Accrued taxes58
 58
 1
-Retail fuel cost over recovery
 
 (84)
-Other current liabilities150
 (107) (33)
Net cash provided from operating activities2,907
 2,769
 1,912
Investing Activities:     
Property additions(3,510) (3,116) (2,704)
Proceeds pursuant to the Toshiba Guarantee, net of joint owner portion            
 
 1,682
Nuclear decommissioning trust fund purchases(628) (839) (574)
Nuclear decommissioning trust fund sales622
 833
 568
Cost of removal, net of salvage(186) (107) (100)
Change in construction payables, net of joint owner portion(122) 68
 223
Payments pursuant to LTSAs(81) (54) (64)
Proceeds from dispositions and asset sales14
 138
 96
Other investing activities6
 (32) (39)
Net cash used for investing activities(3,885) (3,109) (912)
Financing Activities:     
Increase (decrease) in notes payable, net(179) 294
 (391)
Proceeds —     
FFB loan1,218
 
 
Senior notes750
 
 1,350
Pollution control revenue bonds issuances and remarketings584
 108
 65
Capital contributions from parent company634
 2,985
 431
Short-term borrowings250
 
 700
Other long-term debt
 
 370
Redemptions and repurchases —     
Senior notes(500) (1,500) (450)
Pollution control revenue bonds(223) (469) (65)
Short-term borrowings
 (150) (550)
Preferred and preference stock
 
 (270)
Other long-term debt
 (100) 
Payment of common stock dividends(1,576) (1,396) (1,281)
Premiums on redemption and repurchases of senior notes
 (152) 
Other financing activities(40) (20) (60)
Net cash provided from (used for) financing activities918
 (400) (151)
Net Change in Cash, Cash Equivalents, and Restricted Cash(60) (740) 849
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year112
 852
 3
Cash, Cash Equivalents, and Restricted Cash at End of Year$52
 $112
 $852
Supplemental Cash Flow Information:     
Cash paid during the period for —     
Interest (net of $35, $26, and $23 capitalized, respectively)$373
 $408
 $386
Income taxes (net of refunds)110
 300
 496
Noncash transactions — Accrued property additions at year-end560
 683
 550
The accompanying notes are an integral part of these financial statements.

BALANCE SHEETS
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$52
 $4
Restricted cash and cash equivalents
 108
Receivables —   
Customer accounts receivable533
 591
Unbilled revenues203
 208
Under recovered fuel clause revenues
 115
Joint owner accounts receivable136
 170
Affiliated21
 39
Other accounts and notes receivable209
 80
Accumulated provision for uncollectible accounts(2) (2)
Fossil fuel stock272
 231
Materials and supplies501
 519
Prepaid expenses63
 142
Regulatory assets – storm damage reserves213
 30
Regulatory assets – asset retirement obligations254
 
Other regulatory assets263
 169
Other current assets77
 70
Total current assets2,795
 2,474
Property, Plant, and Equipment:   
In service38,137
 37,675
Less: Accumulated provision for depreciation11,753
 12,096
Plant in service, net of depreciation26,384
 25,579
Nuclear fuel, at amortized cost555
 550
Construction work in progress5,650
 4,833
Total property, plant, and equipment32,589
 30,962
Other Property and Investments:   
Equity investments in unconsolidated subsidiaries52
 51
Nuclear decommissioning trusts, at fair value1,013
 873
Miscellaneous property and investments64
 72
Total other property and investments1,129
 996
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization1,428
 
Deferred charges related to income taxes519
 517
Regulatory assets – asset retirement obligations, deferred2,865
 2,644
Other regulatory assets, deferred2,716
 2,258
Other deferred charges and assets500
 514
Total deferred charges and other assets8,028
 5,933
Total Assets$44,541
 $40,365
The accompanying notes are an integral part of these financial statements.


BALANCE SHEETS
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$1,025
 $617
Notes payable365
 294
Accounts payable —   
Affiliated512
 575
Other711
 890
Customer deposits283
 276
Accrued taxes407
 377
Accrued interest118
 105
Accrued compensation233
 221
Operating lease obligations144
 
Asset retirement obligations265
��202
Other regulatory liabilities447
 169
Other current liabilities187
 183
Total current liabilities4,697
 3,909
Long-Term Debt (See accompanying statements)
10,791
 9,364
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes3,257
 3,062
Deferred credits related to income taxes2,862
 3,080
Accumulated deferred ITCs255
 262
Employee benefit obligations540
 599
Operating lease obligations, deferred1,282
 
Asset retirement obligations, deferred5,519
 5,627
Other deferred credits and liabilities273
 139
Total deferred credits and other liabilities13,988
 12,769
Total Liabilities29,476
 26,042
Common Stockholder's Equity (See accompanying statements)
15,065
 14,323
Total Liabilities and Stockholder's Equity$44,541
 $40,365
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Georgia Power Company 2019 Annual Report
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$498
  
20202.00%950
950
  
20212.40%325
325
  
20222.85%400
400
  
20235.75%100
100
  
20242.20%400

  
2026-20434.21%3,675
3,325
  
Total long-term notes payable 5,850
5,598
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20222.35%53
53
  
Due 2025-20532.37%1,217
748
  
Variable rate due 2019
108
  
Variable rate due 2026-20521.74%551
551
  
FFB loans —     
Maturity     
20203.20%64
44
  
20213.20%64
44
  
20223.20%64
44
  
20233.20%64
44
  
20243.20%64
44
  
2025-20443.20%3,523
2,405
  
Junior subordinated notes due 20775.00%270
270
  
Total other long-term debt 5,934
4,355
  
Finance lease obligations 156
142
  
Unamortized debt premium (discount), net (7)(6)  
Unamortized debt issuance expense (117)(108)  
Total long-term debt 11,816
9,981
  
Less amount due within one year 1,025
617
  
Long-term debt excluding amount due within one year 10,791
9,364
41.7%39.5%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 20,000,000 shares     
Outstanding — 9,261,500 shares 398
398
  
Paid-in capital 10,962
10,322
  
Retained earnings 3,756
3,612
  
Accumulated other comprehensive loss (51)(9)  
Total common stockholder's equity 15,065
14,323
58.3
60.5
Total Capitalization $25,856
$23,687
100.0%100.0%
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Georgia Power Company 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20169
 $398
 $6,885
 $4,086
 $(13) $11,356
Net income after dividends on
preferred and preference stock

 
 
 1,414
 
 1,414
Capital contributions from parent company
 
 443
 
 
 443
Other comprehensive income
 
 
 
 3
 3
Cash dividends on common stock
 
 
 (1,281) 
 (1,281)
Other
 
 
 (4) 
 (4)
Balance at December 31, 20179
 398
 7,328
 4,215
 (10) 11,931
Net income after dividends on
preferred and preference stock

 
 
 793
 
 793
Capital contributions from parent company
 
 2,994
 
 
 2,994
Other comprehensive income
 
 
 
 3
 3
Cash dividends on common stock
 
 
 (1,396) 
 (1,396)
Other
 
 
 
 (2) (2)
Balance at December 31, 20189
 398
 10,322
 3,612
 (9) 14,323
Net income after dividends on
preferred and preference stock

 
 
 1,720
 
 1,720
Capital contributions from parent company
 
 640
 
 
 640
Other comprehensive income (loss)
 
 
 
 (42) (42)
Cash dividends on common stock
 
 
 (1,576) 
 (1,576)
Balance at December 31, 20199
 $398
 $10,962
 $3,756
 $(51) $15,065
The accompanying notes are an integral part of these financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states.Company
Opinion on the Financial Statements
We have audited the accompanying balance sheets and statements of capitalization of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Company provides electric service to retail customers in northwest FloridaSouthern Company) as of December 31, 2019 and to wholesale customers2018, the related statements of operations, comprehensive income (loss), common stockholder's equity, and cash flows for each of the three years in the Southeast. Southernperiod ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Mississippi Power constructs, acquires, owns,as of December 31, 2019 and manages generation assets, including renewable energy projects,2018, and sells electricity at market-based ratesthe results of its operations and its cash flows for each of the three years in the wholesale market. Southern Company Gas distributes natural gas through utilitiesperiod ended December 31, 2019, in seven states and is involved in several other complementary businesses including gas marketing services, wholesale gas services, and gas midstream operations. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern LINC provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cable services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants. PowerSecure is a provider of products and servicesconformity with accounting principles generally accepted in the areasUnited States of distributed generation, energy efficiency, and utility infrastructure.America.
The equity method is usedBasis for entities in which the Company has significant influence but does not control.Opinion
The Company is subject to regulation by the FERC and the Florida PSC. As such, the Company'sThese financial statements reflectare the effectsresponsibility of rate regulationMississippi Power's management. Our responsibility is to express an opinion on Mississippi Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Mississippi Power in accordance with GAAPthe U.S. federal securities laws and complythe applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the accounting policiesstandards of the PCAOB. Those standards require that we plan and practices prescribed by its regulatory commissions. The preparation ofperform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Mississippi Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Mississippi Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Mississippi Power's auditor since 2002.


STATEMENTS OF OPERATIONS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$877
 $889
 $854
Wholesale revenues, non-affiliates237
 263
 259
Wholesale revenues, affiliates132
 91
 56
Other revenues18
 22
 18
Total operating revenues1,264
 1,265
 1,187
Operating Expenses:     
Fuel407
 405
 395
Purchased power20
 41
 25
Other operations and maintenance283
 313
 291
Depreciation and amortization192
 169
 161
Taxes other than income taxes113
 107
 104
Estimated loss on Kemper IGCC24
 37
 3,362
Total operating expenses1,039
 1,072
 4,338
Operating Income (Loss)225
 193
 (3,151)
Other Income and (Expense):     
Allowance for equity funds used during construction1
 
 72
Interest expense, net of amounts capitalized(69) (76) (42)
Other income (expense), net12
 17
 1
Total other income and (expense)(56) (59) 31
Earnings (Loss) Before Income Taxes169
 134
 (3,120)
Income taxes (benefit)30
 (102) (532)
Net Income (Loss)139
 236
 (2,588)
Dividends on Preferred Stock
 1
 2
Net Income (Loss) After Dividends on Preferred Stock$139
 $235
 $(2,590)
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Net Income (Loss)$139
 $236
 $(2,588)
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $(1), and $(1), respectively
 (1) (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $1, respectively
1
 1
 1
Total other comprehensive income (loss)1
 
 
Comprehensive Income (Loss)$140
 $236
 $(2,588)
The accompanying notes are an integral part of these financial statements.


STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income (loss)$139
 $236
 $(2,588)
Adjustments to reconcile net income (loss)
to net cash provided from operating activities —
     
Depreciation and amortization, total197
 177
 198
Deferred income taxes37
 475
 (727)
Allowance for equity funds used during construction(1) 
 (72)
Pension and postretirement funding(54) 
 
Settlement of asset retirement obligations(35) (35) (23)
Estimated loss on Kemper IGCC15
 33
 3,179
Other, net21
 18
 (8)
Changes in certain current assets and liabilities —     
-Receivables6
 (19) 540
-Fossil fuel stock(6) (3) 24
-Prepaid income taxes12
 (12) 
-Other current assets(2) (7) (13)
-Accounts payable3
 15
 (3)
-Accrued interest
 (1) (29)
-Accrued taxes11
 (46) 80
-Over recovered regulatory clause revenues16
 14
 (51)
-Other current liabilities(20) (41) (4)
Net cash provided from operating activities339
 804
 503
Investing Activities:     
Property additions(202) (188) (429)
Construction payables(1) 4
 (47)
Payments pursuant to LTSAs(23) (29) (10)
Other investing activities(37) (19) (18)
Net cash used for investing activities(263) (232) (504)
Financing Activities:     
Decrease in notes payable, net
 (4) (18)
Proceeds —     
Capital contributions from parent company51
 15
 1,002
Senior notes
 600
 
Long-term debt issuance to parent company
 
 40
Short-term borrowings
 300
 109
Pollution control revenue bonds43
 
 
Redemptions —     
Preferred stock
 (33) 
Pollution control revenue bonds
 (43) 
Short-term borrowings
 (300) (109)
Long-term debt to parent company
 
 (591)
Capital leases
 
 (71)
Senior notes(25) (155) (35)
Other long-term debt
 (900) (300)
Return of capital to parent company(150) 
 
Other financing activities(2) (7) (2)
Net cash provided from (used for) financing activities(83) (527) 25
Net Change in Cash, Cash Equivalents, and Restricted Cash(7) 45
 24
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year293
 248
 224
Cash, Cash Equivalents, and Restricted Cash at End of Year$286
 $293
 $248
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $(1), $-, and $29 capitalized, respectively)$71
 $80
 $65
Income taxes (net of refunds)(27) (525) (424)
Noncash transactions — Accrued property additions at year-end35
 35
 32
The accompanying notes are an integral part of these financial statements. 

BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$286
 $293
Receivables —   
Customer accounts receivable35
 34
Unbilled revenues39
 41
Affiliated27
 21
Other accounts and notes receivable26
 31
Fossil fuel stock26
 20
Materials and supplies61
 53
Other regulatory assets99
 116
Prepaid income taxes
 12
Other current assets10
 7
Total current assets609
 628
Property, Plant, and Equipment:   
In service4,857
 4,900
Less: Accumulated provision for depreciation1,463
 1,429
Plant in service, net of depreciation3,394
 3,471
Construction work in progress126
 103
Total property, plant, and equipment3,520
 3,574
Other Property and Investments131
 24
Deferred Charges and Other Assets:   
Deferred charges related to income taxes32
 33
Regulatory assets – asset retirement obligations210
 143
Other regulatory assets, deferred360
 331
Accumulated deferred income taxes139
 150
Other deferred charges and assets34
 3
Total deferred charges and other assets775
 660
Total Assets$5,035
 $4,886
The accompanying notes are an integral part of these financial statements.


BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$281
 $40
Accounts payable —   
Affiliated76
 60
Other75
 90
Accrued taxes105
 95
Accrued interest15
 15
Accrued compensation35
 38
Accrued plant closure costs15
 29
Asset retirement obligations33
 34
Other regulatory liabilities21
 12
Over recovered regulatory clause liabilities29
 14
Other current liabilities49
 28
Total current liabilities734
 455
Long-Term Debt (See accompanying statements)
1,308
 1,539
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes424
 378
Deferred credits related to income taxes352
 382
Employee benefit obligations99
 115
Asset retirement obligations, deferred157
 126
Other cost of removal obligations189
 185
Other regulatory liabilities, deferred76
 81
Other deferred credits and liabilities44
 16
Total deferred credits and other liabilities1,341
 1,283
Total Liabilities3,383
 3,277
Common Stockholder's Equity (See accompanying statements)
1,652
 1,609
Total Liabilities and Stockholder's Equity$5,035
 $4,886
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Due 2028-20424.16%$950
$950
  
Adjustable rate due 20202.59%275
300
  
Total long-term notes payable 1,225
1,250
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20283.20%43

  
Variable rate due 20201.80%7
40
  
Variable rate due 2025-20281.80%33

  
Plant Daniel revenue bonds due 20217.13%270
270
  
Total other long-term debt 353
310
  
Unamortized debt premium (discount), net 19
27
  
Unamortized debt issuance expense (8)(8)  
Total long-term debt 1,589
1,579
  
Less amount due within one year 281
40
  
Long-term debt excluding amount due within one year 1,308
1,539
44.2%48.9%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 1,130,000 shares 

  
Outstanding — 1,121,000 shares 38
38
  
Paid-in capital 4,449
4,546
  
Accumulated deficit (2,832)(2,971)  
Accumulated other comprehensive loss (3)(4)  
Total common stockholder's equity 1,652
1,609
55.8
51.1
Total Capitalization $2,960
$3,148
100.0%100.0%
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 Number of Common Shares Issued 
Common
Stock
 Paid-In Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20161
 $38
 $3,525
 $(616) $(4) $2,943
Net loss after dividends on preferred stock
 
 
 (2,590) 
 (2,590)
Capital contributions from parent company
 
 1,004
 
 
 1,004
Other
 
 
 1
 
 1
Balance at December 31, 20171
 38
 4,529
 (3,205) (4) 1,358
Net income after dividends on preferred stock
 
 
 235
 
 235
Capital contributions from parent company
 
 17
 
 
 17
Other
 
 
 (1) 
 (1)
Balance at December 31, 20181
 38
 4,546
 (2,971) (4) 1,609
Net income after dividends on preferred stock
 
 
 139
 
 139
Return of capital to parent company
 
 (150) 
 
 (150)
Capital contributions from parent company
 
 53
 
 
 53
Other comprehensive income
 
 
 
 1
 1
Balance at December 31, 20191
 $38
 $4,449
 $(2,832) $(3) $1,652
The accompanying notes are an integral part of these financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with GAAP requiresaccounting principles generally accepted in the useUnited States of estimates,America.
Basis for Opinion
These financial statements are the responsibility of Southern Power's management. Our responsibility is to express an opinion on Southern Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Power in accordance with the U.S. federal securities laws and the actual results may differ fromapplicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those estimates. Certain prior years' data presentedrisks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements have been reclassified to conform tostatements. Our audits also included evaluating the current year presentation.
Recently Issued Accounting Standards
In 2014,accounting principles used and significant estimates made by management, as well as evaluating the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principleoverall presentation of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accountedWe believe that our audits provide a reasonable basis for under ASC 606 and offsetting regulatory treatment is not permitted, it couldour opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have a material impact on the Company's financial statements.served as Southern Power's auditor since 2002.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is

NOTES (continued)
GulfCONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company 2016and Subsidiary Companies 2019 Annual Report

effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Notes 5, 8, and 11 for disclosures impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
Affiliate Transactions
 2019 2018 2017
 (in millions)
Operating Revenues:     
Wholesale revenues, non-affiliates$1,528
 $1,757
 $1,671
Wholesale revenues, affiliates398
 435
 392
Other revenues12
 13
 12
Total operating revenues1,938
 2,205
 2,075
Operating Expenses:     
Fuel577
 699
 621
Purchased power108
 176
 149
Other operations and maintenance359
 395
 386
Depreciation and amortization479
 493
 503
Taxes other than income taxes40
 46
 48
Asset impairment3
 156
 
Gain on dispositions, net(23) (2) 
Total operating expenses1,543
 1,963
 1,707
Operating Income395
 242
 368
Other Income and (Expense):     
Interest expense, net of amounts capitalized(169) (183) (191)
Other income (expense), net47
 23
 1
Total other income and (expense)(122) (160) (190)
Earnings Before Income Taxes273
 82
 178
Income taxes (benefit)(56) (164) (939)
Net Income329
 246
 1,117
Net income (loss) attributable to noncontrolling interests(10) 59
 46
Net Income Attributable to Southern Power$339
 $187
 $1,071
The Company hasaccompanying notes are an agreement with SCS under which the following services are rendered to the Company at direct or allocated cost: general and design engineering, operations, purchasing, accounting, finance and treasury, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, and other services with respect to business and operations, construction management, and power pool transactions. Costs forintegral part of these services amounted to $80 million, $81 million, and $80 million during 2016, 2015, and 2014, respectively. Cost allocation methodologies used by SCS prior to the repeal of the Public Utility Holding Company Act of 1935, as amended, were approved by the SEC. Subsequently, additional cost allocation methodologies have been reported to the FERC and management believes they are reasonable. The FERC permits services to be rendered at cost by system service companies.consolidated financial statements.
The Company has operating agreements with Georgia Power and Mississippi Power under which the Company owns a portion of Plant Scherer and Plant Daniel, respectively. Georgia Power operates Plant Scherer and Mississippi Power operates Plant Daniel. The Company reimbursed Georgia Power $8 million, $12 million, and $9 million and Mississippi Power $26 million, $27 million, and $31 million in 2016, 2015, and 2014, respectively, for its proportionate share of related expenses. See Note 4 and Note 7 under "Operating Leases" for additional information.
The Company has an agreement with Alabama Power under which Alabama Power made transmission system upgrades to ensure firm delivery of energy under a non-affiliate PPA from a combined cycle plant located in Alabama. Payments by the Company to Alabama Power for the improvements were $12 million, $14 million, and $12 million in 2016, 2015, and 2014, respectively, and are expected to be approximately $10 million annually for 2017 through 2023, when the PPA expires. These costs have been approved for recovery by the Florida PSC through the Company's purchased power capacity cost recovery clause and by the FERC in the transmission facilities cost allocation tariff.
In 2016, the Company purchased a turbine rotor assembly from Southern Power for $6.8 million.
The Company provides incidental services to and receives such services from other Southern Company subsidiaries which are generally minor in duration and amount. Except as described herein, the Company neither provided nor received any material services to or from affiliates in 2016, 2015, or 2014.
The traditional electric operating companies, including the Company and Southern Power may jointly enter into various types of wholesale energy, natural gas, and certain other contracts, either directly or through SCS, as agent. Each participating company may be jointly and severally liable for the obligations incurred under these agreements. See Note 7 under "Fuel and Purchased Power Agreements" for additional information.

NOTES (continued)
GulfCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company 2016and Subsidiary Companies 2019 Annual Report

Regulatory Assets and Liabilities
The Company is subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers through the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
Regulatory assets and (liabilities) reflected in the balance sheets at December 31 relate to:
 2016
 2015
 Note
 (in millions)  
Retiree benefit plans, net$160
 $147
 (a,b)
PPA charges141
 163
 (b,c)
Closure of ash ponds75
 29
 (b,d)
Remaining book value of retired assets66
 4
 (e)
Deferred income tax charges56
 59
 (f)
Environmental remediation44
 46
 (b,d)
Regulatory asset, offset to other cost of removal29
 29
 (g)
Deferred return on transmission upgrades25
 10
 (g)
Fuel-hedging assets, net24
 104
 (b,h)
Other regulatory assets, net18
 16
 (i)
Loss on reacquired debt18
 15
 (j)
Asset retirement obligations, net7
 (1) (b,f)
Other cost of removal obligations(278) (262) (f)
Property damage reserve(40) (38) (e)
Over recovered regulatory clause revenues(23) (22) (k)
Deferred income tax credits(2) (3) (f)
Total regulatory assets (liabilities), net$320
 $296
  
 2019 2018 2017
 (in millions)
Net Income$329
 $246
 $1,117
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(22), $(17), and $39, respectively(66) (51) 63
Reclassification adjustment for amounts included in net income,
net of tax of $14, $19, and $(46), respectively
41
 58
 (73)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(6), $2, and $-, respectively(17) 5
 
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $-, respectively

 2
 
Total other comprehensive income (loss)(42) 14
 (10)
Comprehensive income (loss) attributable to noncontrolling interests(10) 59
 46
Comprehensive Income Attributable to Southern Power$297
 $201
 $1,061
Note: The recoveryaccompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and amortization periods for2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$329
 $246
 $1,117
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total505
 524
 536
Deferred income taxes(74) (244) (263)
Utilization of federal investment tax credits734
 5
 
Amortization of investment tax credits(151) (58) (57)
Accrued income taxes, non-current
 (14) 14
Income taxes receivable, non-current25
 42
 (61)
Pension and postretirement funding(24) 
 
Asset impairment3
 156
 
Other, net(33) 7
 (13)
Changes in certain current assets and liabilities —     
-Receivables72
 (20) (60)
-Prepaid income taxes39
 25
 24
-Other current assets(8) (26) (28)
-Accrued taxes6
 7
 (55)
-Other current liabilities(38) (19) 1
Net cash provided from operating activities1,385
 631
 1,155
Investing Activities:     
Business acquisitions. net of cash acquired(50) (65) (1,016)
Property additions(489) (315) (268)
Change in construction payables7
 (6) (153)
Investment in unconsolidated subsidiaries(116) 
 
Proceeds from dispositions and asset sales572
 203
 
Payments pursuant to LTSAs and for equipment not yet received(104) (75) (203)
Other investing activities13
 31
 15
Net cash used for investing activities(167) (227) (1,625)
Financing Activities:     
Increase (decrease) in notes payable, net449
 (105) (104)
Proceeds —     
Short-term borrowings100
 200
 
Capital contributions from parent company64
 2
 
Senior notes
 
 525
Other long-term debt
 
 43
Redemptions —     
Senior notes(600) (350) (500)
Other long-term debt
 (420) (18)
Short-term borrowings(100) (100) 
Return of capital to parent company(755) (1,650) 
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Purchase of membership interests from noncontrolling interests
 
 (59)
Payment of common stock dividends(206) (312) (317)
Other financing activities(12) (26) (33)
Net cash used for financing activities(1,120) (363) (502)
Net Change in Cash, Cash Equivalents, and Restricted Cash98
 41
 (972)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year181
 140
 1,112
Cash, Cash Equivalents, and Restricted Cash at End of Year$279
 $181
 $140
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $15, $17, and $11 capitalized, respectively)$167
 $173
 $189
Income taxes (net of refunds and investment tax credits)(664) 79
 (487)
Noncash transactions — Accrued property additions at year-end57
 31
 32
The accompanying notes are an integral part of these regulatory assetsconsolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and (liabilities)2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$279
 $181
Receivables —   
Customer accounts receivable107
 111
Affiliated30
 55
Other73
 116
Materials and supplies191
 220
Prepaid income taxes36
 25
Other current assets43
 37
Total current assets759
 745
Property, Plant, and Equipment:   
In service13,270
 13,271
Less: Accumulated provision for depreciation2,464
 2,171
Plant in service, net of depreciation10,806
 11,100
Construction work in progress515
 430
Total property, plant, and equipment11,321
 11,530
Other Property and Investments:   
Intangible assets, net of amortization of $69 and $61
at December 31, 2019 and December 31, 2018, respectively
322
 345
Equity investments in unconsolidated subsidiaries28
 
Total other property and investments350
 345
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization369
 
Prepaid LTSAs128
 98
Accumulated deferred income taxes551
 1,186
Income taxes receivable, non-current5
 30
Assets held for sale601
 576
Other deferred charges and assets216
 373
Total deferred charges and other assets1,870
 2,263
Total Assets$14,300
 $14,883
The accompanying notes are as follows:an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$824
 $599
Notes payable549
 100
Accounts payable —   
Affiliated56
 92
Other85
 77
Accrued taxes26
 6
Accrued interest32
 36
Other current liabilities132
 121
Total current liabilities1,704
 1,031
Long-Term Debt:   
Senior notes —   
2.375% due 2020
 300
2.50% due 2021300
 300
1.00% due 2022674
 687
2.75% due 2023290
 290
Weighted average interest rate 4.12% at 12/31/19 due 2025-20462,337
 2,348
Other long-term debt —   
Variable rate (3.34% at 12/31/18) due 2020
 525
Unamortized debt premium (discount), net(8) (9)
Unamortized debt issuance expense(19) (23)
Total long-term debt3,574
 4,418
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes115
 105
Accumulated deferred ITCs1,731
 1,832
Operating lease obligations376
 
Other deferred credits and liabilities178
 213
Total deferred credits and other liabilities2,400
 2,150
Total Liabilities7,678
 7,599
Common Stockholder's Equity:   
Common stock, par value $0.01 per share —   
Authorized — 1,000,000 shares   
Outstanding — 1,000 shares
 
Paid-in capital909
 1,600
Retained earnings1,485
 1,352
Accumulated other comprehensive income (loss)(26) 16
Total common stockholder's equity2,368
 2,968
Noncontrolling Interests4,254
 4,316
Total Stockholders' Equity6,622
 7,284
Total Liabilities and Stockholders' Equity$14,300
 $14,883
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings
 Accumulated Other Comprehensive Income Total Common Stockholder's Equity 
Noncontrolling Interests(a)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $3,671
 $724
 $35
 $4,430
 $1,245
 $5,675
Net income attributable
   to Southern Power

 
 
 1,071
 
 1,071
 
 1,071
Capital contributions to
   parent company, net

 
 (2) 
 
 (2) 
 (2)
Other comprehensive income (loss)
 
 
 
 (10) (10) 
 (10)
Cash dividends on common
   stock

 
 
 (317) 
 (317) 
 (317)
Other comprehensive income
transfer from SCS
(b)

 
 
 
 (27) (27) 
 (27)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 79
 79
Distributions to noncontrolling
   interests

 
 
 
 
 
 (122) (122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 44
 44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 114
 114
Other
 
 (7) 
 
 (7) 
 (7)
Balance at December 31, 2017
 
 3,662
 1,478
 (2) 5,138
 1,360
 6,498
Net income attributable
   to Southern Power

 
 
 187
 
 187
 
 187
Return of capital to parent
   company

 
 (1,650) 
 
 (1,650) 
 (1,650)
Capital contributions from parent
   company

 
 2
 
 
 2
 
 2
Other comprehensive income
 
 
 
 14
 14
 
 14
Cash dividends on common
   stock

 
 
 (312) 
 (312) 
 (312)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 1,372
 1,372
Distributions to noncontrolling
   interests

 
 
 
 
 
 (164) (164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 59
 59
Sale of noncontrolling interests(c)

 
 (417) 
 
 (417) 1,690
 1,273
Other
 
 3
 (1) 4
 6
 (1) 5
Balance at December 31, 2018
 
 1,600
 1,352
 16
 2,968
 4,316
 7,284
Net income attributable
   to Southern Power

 
 
 339
 
 339
 
 339
Return of capital to parent
   company

 
 (755) 
 
 (755) 
 (755)
Capital contributions from parent
   company

 
 64
 
 
 64
 
 64
Other comprehensive income (loss)
 
 
 
 (42) (42) 
 (42)
Cash dividends on common
   stock

 
 
 (206) 
 (206) 
 (206)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 276
 276
Distributions to noncontrolling
   interests

 
 
 
 
 
 (327) (327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 (10) (10)
Other
 
 
 
 
 
 (1) (1)
Balance at December 31, 2019
 $
 $909
 $1,485
 $(26) $2,368
 $4,254
 $6,622
(a)Recovered and amortized over the average remaining service period which may range up to 14 years.Excludes redeemable noncontrolling interests. See Note 27 to the financial statements under "Noncontrolling Interests" for additional information.
(b)Not earningIn connection with Southern Power becoming a return as offset in rate base by a corresponding asset or liability.participant to the Southern Company qualified pension plan and other postretirement benefit plan, $27 million of other comprehensive income, net of tax of $9 million, was transferred from SCS.
(c)Recovered over the life of the PPA for periods up to seven years.
(d)Recovered through the environmental cost recovery clause when the remediation or the work is performed.
(e)Recorded and recovered or amortized as approved by the Florida PSC.
(f)Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 65 years. Asset retirement and removal assets and liabilities will be settled and trued up following completion of the related activities.
(g)Recorded as authorized by the Florida PSC in a settlement agreement approved in December 2013 (2013 Rate Case Settlement Agreement).
See Note 315 under "Southern Power - Sales of Renewable Facility Interests" for additional information.
(h)Fuel-hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed five years. Upon final settlement, actual costs incurred are recovered through the fuel cost recovery clause.
(i)Comprised primarily of vacation pay. Other regulatory assets costs, with the exception of vacation pay, are recorded and recovered or amortized as approved by the Florida PSC. Vacation pay, including banked holiday pay, does not earn a return as offset in rate base by a corresponding liability; it is recorded as earned by employees and recovered as paid, generally within one year.
(j)Recovered over either the remaining life of the original issue or, if refinanced, over the life of the new issue, which may range up to 40 years.
(k)Recorded and recovered or amortized as approved by the Florida PSC, generally within one year.
In the event that a portionThe accompanying notes are an integral part of the Company's operations is no longer subject to applicable accounting rules for rate regulation, the Company would be required to write off to income or reclassify to accumulated OCI related regulatory assets and liabilities that are not specifically recoverable through regulated rates. In addition, the Company would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets and liabilities are to be reflected in rates. See Note 3 under "Retail Regulatory Matters" for additional information.these consolidated financial statements.

NOTES (continued)
Gulf Power Company 2016 Annual Report


Revenues
Wholesale capacity revenues are generally recognized on a levelized basis over the appropriate contract period. Energy and other revenues are recognized as services are provided. Unbilled revenues related to retail sales are accrued at the end of each fiscal period. Electric rates for the Company include provisions to adjust billings for fluctuations in fuel costs, the energy component of purchased power costs, and certain other costs. The Company continuously monitors the over or under recovered fuel cost balance in light of the inherent variability in fuel costs. The Company is required to notify the Florida PSC if the projected fuel cost over or under recovery is expected to exceed 10% of the projected fuel revenue applicable for the period and indicate if an adjustment to the fuel cost recovery factor is being requested. The Company has similar retail cost recovery clauses for energy conservation costs, purchased power capacity costs, and environmental compliance costs. Revenues are adjusted for differences between these actual costs and amounts billed in current regulated rates. Under or over recovered regulatory clause revenues are recorded in the balance sheets and are recovered or returned to customers through adjustments to the billing factors. Annually, the Company petitions for recovery of projected costs including any true-up amounts from prior periods, and approved rates are implemented each January. See Note 3 under "Retail Regulatory Matters" for additional information.
The Company has a diversified base of customers. No single customer or industry comprises 10% or more of revenues. For all periods presented, uncollectible accounts averaged less than 1% of revenues.
Fuel Costs
Fuel costs are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. Fuel expense and emissions allowance costs are recovered by the Company through the fuel cost recovery and environmental cost recovery rates, respectively, approved annually by the Florida PSC.
Income and Other Taxes
The Company uses the liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. Federal ITCs utilized are deferred and amortized to income over the average life of the related property and state ITCs are recognized in the period in which the credit is claimed on the state income tax return. Taxes that are collected from customers on behalf of governmental agencies to be remitted to these agencies are presented net on the statements of income.
The Company recognizes tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 5 under "Unrecognized Tax Benefits" for additional information.
Property, Plant, and Equipment
Property, plant, and equipment is stated at original cost less any regulatory disallowances and impairments. Original cost includes: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and cost of equity funds used during construction.
The Company's property, plant, and equipment in service consisted of the following at December 31:
 2016 2015
 (in millions)
Generation$3,001
 $2,974
Transmission706
 691
Distribution1,241
 1,196
General191
 182
Plant acquisition adjustment1
 2
Total plant in service$5,140
 $5,045
The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed.
Depreciation and Amortization
Depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates, which approximated 3.5% in both 2016 and 2015 and 3.6% in 2014. Depreciation studies are conducted periodically to update the composite rates. These studies are approved by the Florida PSC and the FERC. When property subject to depreciation is retired or

NOTES (continued)
Gulf Power Company 2016 Annual Report

otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the plant are retired when the related property unit is retired. As authorized by the Florida PSC in the 2013 Rate Case Settlement Agreement, the Company is allowed to reduce depreciation and record a regulatory asset in an aggregate amount up to $62.5 million between January 2014 and June 2017. See Note 3 herein under "Retail Regulatory Matters – Retail Base Rate Cases" for additional information.
Asset Retirement Obligations and Other Costs of Removal
AROs are computed as the present value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. The Company has received an order from the Florida PSC allowing the continued accrual of other future retirement costs for long-lived assets that the Company does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as a regulatory liability.
The liability for AROs primarily relates to facilities that are subject to the Disposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in April 2015 (CCR Rule), principally ash ponds, and to the closure of an ash pond at Plant Scholz. In addition, the Company has retirement obligations related to combustion turbines at its Pea Ridge facility, various landfill sites, a barge unloading dock, asbestos removal, and disposal of polychlorinated biphenyls in certain transformers. The Company also has identified retirement obligations related to certain transmission and distribution facilities, certain wireless communication towers, and certain structures authorized by the U.S. Army Corps of Engineers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO. The Company will continue to recognize in the statements of income allowed removal costs in accordance with its regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability, as ordered by the Florida PSC, and are reflected in the balance sheets.
Details of the AROs included in the balance sheets are as follows:
 2016 2015
 (in millions)
Balance at beginning of year$130
 $17
Liabilities incurred1
 105
Liabilities settled(1) (1)
Accretion4
 2
Cash flow revisions2
 7
Balance at end of year$136
 $130
The increase in liabilities incurred in 2015 is primarily related to AROs associated with the portion of the Company's steam generation facilities impacted by the CCR Rule and the closure of an ash pond at Plant Scholz. In connection with permitting activity related to the coal ash pond at the retired Plant Scholz facility, the Company recorded additional AROs of $29 million in 2015.
The cost estimates for AROs related to CCR are based on information as of December 31, 2016 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure for those facilities impacted by the CCR Rule. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their currently anticipated useful life, the Company expects to continue to periodically update these estimates.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Allowance for Funds Used During Construction
The Company records AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the plant through a higher rate base and higher depreciation. The equity component of AFUDC is not included in calculating taxable income. The average annual AFUDC rate was 5.73% for all years presented. AFUDC, net of income taxes, as a percentage of net income after dividends on preference stock was 0.00%, 10.80%, and 10.93% for 2016, 2015, and 2014, respectively.
Impairment of Long-Lived Assets and Intangibles
The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. The determination of whether an impairment has occurred is based on either a specific regulatory disallowance or an estimate of undiscounted future cash flows attributable to the assets, as compared with the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by either the amount of regulatory disallowance or by estimating the fair value of the assets and recording a loss if the carrying value is greater than the fair value. For assets identified as held for sale, the carrying value is compared to the estimated fair value less the cost to sell in order to determine if an impairment loss is required. Until the assets are disposed of, their estimated fair value is re-evaluated when circumstances or events change.
Property Damage Reserve
The Company accrues for the cost of repairing damages from major storms and other uninsured property damages, including uninsured damages to transmission and distribution facilities, generation facilities, and other property. The costs of such damage are charged to the reserve. The Florida PSC approved annual accrual to the property damage reserve is $3.5 million, with a target level for the reserve between $48 million and $55 million. The Florida PSC also authorized the Company to make additional accruals above $3.5 million at the Company's discretion. The Company accrued total expenses of $3.5 million in each of 2016, 2015, and 2014. As of December 31, 2016 and 2015, the balance in the Company's property damage reserve totaled approximately $40 million and $38 million, respectively, which is included in deferred liabilities in the balance sheets.
When the property damage reserve is inadequate to cover the cost of major storms, the Florida PSC can authorize a storm cost recovery surcharge to be applied to customer bills. As authorized in the 2013 Rate Case Settlement Agreement, the Company may recover costs associated with any tropical systems named by the National Hurricane Center through the initiation of a storm surcharge. The storm surcharge will begin, on an interim basis, 60 days following the filing of a cost recovery petition. The storm surcharge generally may not exceed $4.00/1,000 KWHs on monthly residential bills in aggregate for a calendar year. This limitation does not apply if the Company incurs in excess of $100 million in storm recovery costs that qualify for recovery in a given calendar year. This threshold amount is inclusive of the amount necessary to replenish the storm reserve to the level that existed as of December 31, 2013. See Note 3 under "Retail Regulatory Matters – Retail Base Rate Cases" for additional details of the 2013 Rate Case Settlement Agreement.
Injuries and Damages Reserve
The Company is subject to claims and lawsuits arising in the ordinary course of business. As permitted by the Florida PSC, the Company accrues for the uninsured costs of injuries and damages by charges to income amounting to $1.6 million annually. The Florida PSC has also given the Company the flexibility to increase its annual accrual above $1.6 million to the extent the balance in the reserve does not exceed $2 million and to defer expense recognition of liabilities greater than the balance in the reserve. The cost of settling claims is charged to the reserve. The injuries and damages reserve had a balance of $1.4 million at December 31, 2016, which is included in current liabilities in the balance sheets. The balance was zero at December 31, 2015. There were no liabilities in excess of the reserve balance at December 31, 2016. The Company recorded a liability with a corresponding regulatory asset of $1.7 million for estimated liabilities related to outstanding claims and suits in excess of the reserve balance at December 31, 2015, of which $1.6 million and $0.1 million are included in current liabilities and deferred credits and other liabilities in the balance sheets, respectively.
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Materials and Supplies
Generally, materials and supplies include the average cost of transmission, distribution, and generating plant materials. Materials are charged to inventory when purchased and then expensed or capitalized to plant, as appropriate, at weighted average cost when installed.
Fuel Inventory
Fuel inventory includes the average cost of oil, natural gas, coal, transportation, and emissions allowances. Fuel is recorded to inventory when purchased and then expensed, at weighted average cost, as used. Fuel expense and emissions allowance costs are recovered by the Company through the fuel cost recovery and environmental cost recovery rates, respectively, approved annually by the Florida PSC. Emissions allowances granted by the EPA are included in inventory at zero cost.
Financial Instruments
The Company uses derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, and electricity purchases and sales. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (included in "Other" or shown separately as "Risk Management Activities") and are measured at fair value. See Note 9 for additional information regarding fair value. Substantially all of the Company's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the Florida PSC approved fuel-hedging program result in the deferral of related gains and losses in OCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. Any ineffectiveness arising from cash flow hedges is recognized currently in net income. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the statements of income. Cash flows from derivatives are classified on the statement of cash flows in the same category as the hedged item. The Florida PSC approved a stipulation and agreement that prospectively imposed a moratorium on the Company's fuel-hedging program in October 2016 through December 31, 2017. The moratorium does not have an impact on the recovery of existing hedges entered into under the previously-approved hedging program. See Note 10 for additional information regarding derivatives.
Beginning in 2016, the Company offsets fair value amounts recognized for multiple derivative instruments executed with the same counterparty under a netting arrangement. Additionally, the Company had no outstanding collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2016.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company has established controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income, changes in the fair value of qualifying cash flow hedges, and reclassifications for amounts included in net income.
2. RETIREMENT BENEFITS
The Company has a defined benefit, trusteed, pension plan covering substantially all employees. This qualified pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). On December 19, 2016, the Company voluntarily contributed $48 million to the qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2017. The Company also provides certain defined benefit pension plans for a selected group of management and highly compensated employees. Benefits under these non-qualified pension plans are funded on a cash basis. In addition, the Company provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans. The Company funds its other postretirement trusts to the extent required by the FERC. For the year ending December 31, 2017, no other postretirement trust contributions are expected.
Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the following year and the benefit obligations as of the measurement date are presented below.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Assumptions used to determine net periodic costs:2016 2015 2014
Pension plans     
Discount rate – benefit obligations4.71% 4.18% 5.02%
Discount rate – interest costs3.97
 4.18
 5.02
Discount rate – service costs5.04
 4.48
 5.02
Expected long-term return on plan assets8.20
 8.20
 8.20
Annual salary increase4.46
 3.59
 3.59
Other postretirement benefit plans     
Discount rate – benefit obligations4.51% 4.04% 4.86%
Discount rate – interest costs3.68
 4.04
 4.86
Discount rate – service costs4.88
 4.38
 4.86
Expected long-term return on plan assets8.05
 8.07
 8.08
Annual salary increase4.46
 3.59
 3.59
Assumptions used to determine benefit obligations:2016
2015
Pension plans


Discount rate4.46%
4.71%
Annual salary increase4.46

4.46
Other postretirement benefit plans


Discount rate4.25%
4.51%
Annual salary increase4.46

4.46
The Company estimates the expected rate of return on pension plan and other postretirement benefit plan assets using a financial model to project the expected return on each current investment portfolio. The analysis projects an expected rate of return on each of seven different asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a periodic rebalancing of each trust's portfolio.
An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO as of December 31, 2016 were as follows:
 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.50% 4.50% 2025
Post-65 medical5.00
 4.50
 2025
Post-65 prescription10.00
 4.50
 2025
An annual increase or decrease in the assumed medical care cost trend rate of 1% would affect the APBO and the service and interest cost components at December 31, 2016 as follows:
 
1 Percent
Increase
 
1 Percent
Decrease
 (in millions)
Benefit obligation$4
 $3
Service and interest costs
 

NOTES (continued)
Gulf Power Company 2016 Annual Report

Pension Plans
The total accumulated benefit obligation for the pension plans was $460 million at December 31, 2016 and $424 million at December 31, 2015. Changes in the projected benefit obligations and the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$480
 $491
Service cost12
 12
Interest cost19
 20
Benefits paid(17) (20)
Actuarial (gain) loss23
 (23)
Balance at end of year517
 480
Change in plan assets   
Fair value of plan assets at beginning of year420
 435
Actual return (loss) on plan assets39
 4
Employer contributions49
 1
Benefits paid(17) (20)
Fair value of plan assets at end of year491
 420
Accrued liability$(26) $(60)
At December 31, 2016, the projected benefit obligations for the qualified and non-qualified pension plans were $494 million and $23 million, respectively. All pension plan assets are related to the qualified pension plan.
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's pension plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$153
 $142
Other current liabilities(1) (1)
Employee benefit obligations(25) (59)
Presented below are the amounts included in regulatory assets at December 31, 2016 and 2015 related to the defined benefit pension plans that had not yet been recognized in net periodic pension cost along with the estimated amortization of such amounts for 2017.
 2016 2015 Estimated Amortization in 2017
 (in millions)
Prior service cost$3
 $2
 $1
Net (gain) loss150
 140
 7
Regulatory assets$153
 $142
  

NOTES (continued)
Gulf Power Company 2016 Annual Report

The changes in the balance of regulatory assets related to the defined benefit pension plans for the years ended December 31, 2016 and 2015 are presented in the following table:

2016 2015

(in millions)
Regulatory assets:

 

Beginning balance$142
 $146
Net (gain) loss16
 6
Change in prior service costs2
 
Reclassification adjustments:
 
Amortization of prior service costs(1) (1)
Amortization of net gain (loss)(6) (9)
Total reclassification adjustments(7) (10)
Total change11
 (4)
Ending balance$153
 $142
Components of net periodic pension cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$12
 $12
 $10
Interest cost19
 20
 19
Expected return on plan assets(34) (32) (28)
Recognized net (gain) loss6
 9
 5
Net amortization1
 1
 1
Net periodic pension cost$4
 $10
 $7
Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the Company has elected to amortize changes in the market value of all plan assets over five years rather than recognize the changes immediately. As a result, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.
Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2016, estimated benefit payments were as follows:
 
Benefit
Payments
 (in millions)
2017$20
201822
201923
202024
202126
2022 to 2026149

NOTES (continued)
Gulf Power Company 2016 Annual Report

Other Postretirement Benefits
Changes in the APBO and in the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$81
 $78
Service cost1
 1
Interest cost3
 3
Benefits paid(4) (4)
Actuarial (gain) loss2
 (1)
Plan amendment
 4
Balance at end of year83
 81
Change in plan assets   
Fair value of plan assets at beginning of year17
 18
Actual return (loss) on plan assets2
 
Employer contributions3
 3
Benefits paid(4) (4)
Fair value of plan assets at end of year18
 17
Accrued liability$(65) $(64)
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's other postretirement benefit plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$11
 $10
Other current liabilities(1) (1)
Other regulatory liabilities, deferred(4) (5)
Employee benefit obligations(64) (63)
Approximately $7 million and $5 million was included in net regulatory assets at December 31, 2016 and 2015, respectively, related to the net loss for the other postretirement benefit plans that had not yet been recognized in net periodic other postretirement benefit cost. The estimated amortization of such amounts for 2017 is immaterial.
The changes in the balance of net regulatory assets (liabilities) related to the other postretirement benefit plans for the plan years ended December 31, 2016 and 2015 are presented in the following table:

2016 2015

(in millions)
Net regulatory assets (liabilities):

 

Beginning balance$5
 $2
Net (gain) loss2
 1
Change in prior service costs
 2
Total change2
 3
Ending balance$7
 $5

NOTES (continued)
Gulf Power Company 2016 Annual Report

Components of the other postretirement benefit plans' net periodic cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$1
 $1
 $1
Interest cost3
 3
 3
Expected return on plan assets(1) (1) (1)
Net periodic postretirement benefit cost$3
 $3
 $3
Future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. Estimated benefit payments are reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 
Benefit
Payments
 
Subsidy
Receipts
 Total
 (in millions)
2017$5
 $
 $5
20185
 
 5
20196
 (1) 5
20206
 (1) 5
20216
 (1) 5
2022 to 202630
 (3) 27
Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code of 1986, as amended. The Company's investment policies for both the pension plan and the other postretirement benefit plans cover a diversified mix of assets, including equity and fixed income securities, real estate, and private equity. Derivative instruments are used primarily to gain efficient exposure to the various asset classes and as hedging tools. The Company minimizes the risk of large losses primarily through diversification but also monitors and manages other aspects of risk.

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Gulf Power Company 2016 Annual Report

The composition of the Company's pension plan and other postretirement benefit plan assets as of December 31, 2016 and 2015, along with the targeted mix of assets for each plan, is presented below:
 Target 2016 2015
Pension plan assets:     
Domestic equity26% 29% 30%
International equity25
 22
 23
Fixed income23
 29
 23
Special situations3
 2
 2
Real estate investments14
 13
 16
Private equity9
 5
 6
Total100% 100% 100%
Other postretirement benefit plan assets:     
Domestic equity25% 28% 29%
International equity24
 21
 22
Domestic fixed income25
 31
 25
Special situations3
 2
 2
Real estate investments14
 13
 16
Private equity9
 5
 6
Total100% 100% 100%
The investment strategy for plan assets related to the Company's qualified pension plan is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significant portion of the liability of the pension plan is long-term in nature, the assets are invested consistent with long-term investment expectations for return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Company employs a formal rebalancing program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices.
Investment Strategies
Detailed below is a description of the investment strategies for each major asset category for the pension and other postretirement benefit plans disclosed above:
Domestic equity. A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.
International equity. A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Fixed income. A mix of domestic and international bonds.
Special situations. Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies as well as investments in promising new strategies of a longer-term nature.
Real estate investments. Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.
Private equity. Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Benefit Plan Asset Fair Values
Following are the fair value measurements for the pension plan and the other postretirement benefit plan assets as of December 31, 2016 and 2015. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, management

NOTES (continued)
Gulf Power Company 2016 Annual Report

relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
Valuation methods of the primary fair value measurements disclosed in the following tables are as follows:
Domestic and international equity.Investments in equity securities such as common stocks, American depositary receipts, and real estate investment trusts that trade on a public exchange are classified as Level 1 investments and are valued at the closing price in the active market. Equity investments with unpublished prices (i.e. pooled funds) are valued as Level 2, when the underlying holdings used to value the investment are comprised of Level 1 or Level 2 equity securities.
Fixed income.Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
Real estate investments, private equity, and special situations investments.Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.
The fair values of pension plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2015, investments in special situations were presented in the table below based on the nature of the investment.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$93
 $43
 $
 $
 $136
International equity(*)
57
 52
 
 
 109
Fixed income:         
U.S. Treasury, government, and agency bonds
 27
 
 
 27
Mortgage- and asset-backed securities
 1
 
 
 1
Corporate bonds
 47
 
 
 47
Pooled funds
 24
 
 
 24
Cash equivalents and other46
 
 
 
 46
Real estate investments14
 
 
 53
 67
Special situations
 
 
 8
 8
Private equity
 
 
 25
 25
Total$210
 $194
 $
 $86
 $490
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.

NOTES (continued)
Gulf Power Company 2016 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$73
 $31
 $
 $
 $104
International equity(*)
54
 45
 
 
 99
Fixed income:         
U.S. Treasury, government, and agency bonds
 21
 
 
 21
Mortgage- and asset-backed securities
 9
 
 
 9
Corporate bonds
 51
 
 
 51
Pooled funds
 23
 
 
 23
Cash equivalents and other
 7
 
 
 7
Real estate investments14
 
 
 55
 69
Private equity
 
 
 29
 29
Total$141
 $187
 $
 $84
 $412
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
The fair values of other postretirement benefit plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$3
 $2
 $
 $
 $5
International equity(*)
2
 2
 
 
 4
Fixed income:         
U.S. Treasury, government, and agency bonds
 1
 
 
 1
Corporate bonds
 2
 
 
 2
Pooled funds
 1
 
 
 1
Cash equivalents and other2
 
 
 
 2
Real estate investments1
 
 
 2
 3
Private equity
 
 
 1
 1
Total$8
 $8
 $
 $3
 $19
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.

NOTES (continued)
Gulf Power Company 2016 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$3
 $1
 $
 $
 $4
International equity(*)
2
 2
 
 
 4
Fixed income:         
U.S. Treasury, government, and agency bonds
 1
 
 
 1
Corporate bonds
 2
 
 
 2
Pooled funds
 1
 
 
 1
Cash equivalents and other1
 
 
 
 1
Real estate investments1
 
 
 2
 3
Private equity
 
 
 1
 1
Total$7
 $7
 $
 $3
 $17
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
Employee Savings Plan
The Company also sponsors a 401(k) defined contribution plan covering substantially all employees. The Company provides an 85% matching contribution on up to 6% of an employee's base salary. Total matching contributions made to the plan for 2016, 2015, and 2014 were $5 million, $4 million, and $4 million, respectively.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
The Company is subject to certain claims and legal actions arising in the ordinary course of business. In addition, the Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.
Environmental Matters
Environmental Remediation
The Company must comply with environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Company may also incur substantial costs to clean up affected sites. The Company received authority from the Florida PSC to recover approved environmental compliance costs through the environmental cost recovery clause. The Florida PSC reviews costs and adjusts rates up or down annually.
The Company recognizes a liability for environmental remediation costs only when it determines a loss is probable. At December 31, 2016, the Company's environmental remediation liability included estimated costs of environmental remediation projects of approximately $44 million, of which approximately $4 million is included in under recovered regulatory clause revenues and other current liabilities and approximately $40 million is included in other regulatory assets, deferred and other deferred credits and

NOTES (continued)
Gulf Power Company 2016 Annual Report

liabilities. These estimated costs primarily relate to site closure criteria by the Florida Department of Environmental Protection (FDEP) for potential impacts to soil and groundwater from herbicide applications at the Company's substations. The schedule for completion of the remediation projects is subject to FDEP approval. The projects have been approved by the Florida PSC for recovery through the Company's environmental cost recovery clause; therefore, these liabilities have no impact on net income.
The ultimate outcome of these matters cannot be determined at this time; however, based on the currently known conditions at these sites and the nature and extent of activities relating to these sites, the Company does not believe that additional liabilities, if any, at these sites would be material to the Company's financial statements.
FERC Matters
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company) and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Retail Regulatory Matters
The Company's rates and charges for service to retail customers are subject to the regulatory oversight of the Florida PSC. The Company's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased energy costs, purchased power capacity costs, energy conservation and demand side management programs, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are recovered through the Company's base rates.
Retail Base Rate Cases
In 2013, the Florida PSC approved the 2013 Rate Case Settlement Agreement among the Company and all of the intervenors to the Company's retail base rate case. Under the terms of the 2013 Rate Case Settlement Agreement, the Company (1) increased base rates approximately $35 million and $20 million annually effective January 2014 and 2015, respectively; (2) continued its authorized retail ROE midpoint (10.25%) and range (9.25% – 11.25%); and (3) accrued a return similar to AFUDC on certain transmission system upgrades placed into service after January 2014 through January 1, 2017.
The 2013 Rate Case Settlement Agreement also provides that the Company may reduce depreciation and record a regulatory asset that will be included as an offset to the other cost of removal regulatory liability in an aggregate amount up to $62.5 million from January 2014 through June 2017. In any given month, such depreciation reduction may not exceed the amount necessary for the retail ROE, as reported to the Florida PSC monthly, to reach the midpoint of the authorized retail ROE range then in effect. Recovery of the regulatory asset will occur over a period to be determined by the Florida PSC in the 2016 Rate Case, as defined below. For 2014 and 2015, the Company recognized reductions in depreciation expense of $8.4 million and $20.1 million, respectively. No net reduction in depreciation was recorded in 2016.
On October 12, 2016, the Company filed a petition (2016 Rate Case) with the Florida PSC requesting an annual increase in retail rates and charges of $106.8 million based on the projected test year of January 1, 2017 through December 31, 2017 and a retail ROE of

NOTES (continued)
Gulf Power Company 2016 Annual Report

11% compared to the current retail ROE of 10.25%. The requested increase includes recovery of the portion of Plant Scherer Unit 3 that has been rededicated to serving retail customers following the contract expirations at the end of 2015 and May 2016. If retail recovery of Plant Scherer Unit 3 is not approved by the Florida PSC in the 2016 Rate Case, the Company may consider an asset sale. The current book value of the Company's ownership of Plant Scherer Unit 3 could exceed market value which could result in a material loss. The Florida PSC is expected to make a decision on the 2016 Rate Case in the second quarter 2017. The Company has requested that the increase in base rates, if approved by the Florida PSC, become effective in July 2017. The ultimate outcome of this matter cannot be determined at this time.
Cost Recovery Clauses
On November 2, 2016, the Florida PSC approved the Company's 2017 annual cost recovery clause rates for its fuel, purchased power capacity, environmental, and energy conservation cost recovery clauses. The net effect of the approved changes is a decrease of approximately $41 million in annual revenues effective in January 2017. In general, the decreased revenues will not have a significant impact on net income since most of the revenues will be offset by lower expenses. However, certain costs associated with the ongoing ownership and operation of Plant Scherer Unit 3 were included in the environmental cost recovery clause rate, which increased annual revenues by approximately $12 million in 2016 and is expected to increase revenues by an incremental $2 million for a total of approximately $14 million in 2017. The final disposition of these costs, and the related impact on rates, is subject to the Florida PSC's ultimate ruling on whether costs associated with Plant Scherer Unit 3 are recoverable from retail customers, which is expected to be decided in the 2016 Rate Case as discussed previously. The ultimate outcome of this matter cannot be determined at this time.
Revenues for all cost recovery clauses, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor for fuel and purchased power will have no significant effect on the Company's revenues or net income, but will affect annual cash flow. The recovery provisions for environmental compliance and energy conservation include related expenses and a return on net average investment.
Retail Fuel Cost Recovery
The Company has established fuel cost recovery rates as approved by the Florida PSC. If, at any time during the year, the projected year-end fuel cost over or under recovery balance exceeds 10% of the projected fuel revenue applicable for the period, the Company is required to notify the Florida PSC and indicate if an adjustment to the fuel cost recovery factor is being requested.
At December 31, 2016 and 2015, the over recovered fuel balance was approximately $15 million and $18 million, respectively, which is included in other regulatory liabilities, current in the balance sheets.
Purchased Power Capacity Recovery
The Company has established purchased power capacity recovery cost rates as approved by the Florida PSC. If the projected year-end purchased power capacity cost over or under recovery balance exceeds 10% of the projected purchased power capacity revenue applicable for the period, the Company is required to notify the Florida PSC and indicate if an adjustment to the purchased power capacity cost recovery factor is being requested.
At December 31, 2016 and 2015, the under recovered purchased power capacity balance was immaterial.
Environmental Cost Recovery
The Florida Legislature adopted legislation for an environmental cost recovery clause, which allows an electric utility to petition the Florida PSC for recovery of prudent environmental compliance costs that are not being recovered through base rates or any other recovery mechanism. Such environmental costs include operations and maintenance expenses, emissions allowance expense, depreciation, and a return on net average investment. This legislation also allows recovery of costs incurred as a result of an agreement between the Company and the FDEP for the purpose of ensuring compliance with ozone ambient air quality standards adopted by the EPA.
Annually, the Company seeks recovery of projected costs including any true-up amounts from prior periods. At December 31, 2016, the over recovered environmental balance of approximately $8 million, along with the current portion of projected environmental expenditures, was included in under recovered regulatory clause revenues in the balance sheet. At December 31, 2015, the over recovered environmental balance was immaterial.
In 2012, the Mississippi PSC approved Mississippi Power's request for a certificate of public convenience and necessity to construct scrubbers on Plant Daniel Units 1 and 2, which were placed in service in November 2015. These units are jointly owned by Mississippi Power and the Company, with 50% ownership each. The total cost of the project was approximately $653 million, with the Company's portion being approximately $316 million, excluding AFUDC. The Company's portion of the cost is being recovered through the environmental cost recovery clause.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Energy Conservation Cost Recovery
Every five years, the Florida PSC establishes new numeric conservation goals covering a 10-year period for utilities to reduce annual energy and seasonal peak demand using demand-side management (DSM) programs. After the goals are established, utilities develop plans and programs to meet the approved goals. The costs for these programs are recovered through rates established annually in the energy conservation cost recovery (ECCR) clause.
At December 31, 2016, the under recovered ECCR balance was approximately $4 million, which is included in under recovered regulatory clause revenues in the balance sheet. At December 31, 2015, the over recovered ECCR balance was approximately $4 million, which is included in other regulatory liabilities, current in the balance sheet.
Other Matters
As a result of the cost to comply with environmental regulations imposed by the EPA, the Company retired its coal-fired generation at Plant Smith Units 1 and 2 (357 MWs) on March 31, 2016. The Company filed a petition with the Florida PSC requesting permission to recover the remaining net book value of Plant Smith Units 1 and 2 and the remaining materials and supplies associated with these units as of the retirement date. On August 29, 2016, the Florida PSC approved the Company's request to reclassify these costs, totaling $63 million, to a regulatory asset for recovery over a period to be decided in the 2016 Rate Case. The ultimate outcome of this matter cannot be determined at this time.
4. JOINT OWNERSHIP AGREEMENTS
The Company and Mississippi Power jointly own Plant Daniel Units 1 and 2, which together represent capacity of 1,000 MWs. Plant Daniel is a generating plant located in Jackson County, Mississippi. In accordance with the operating agreement, Mississippi Power acts as the Company's agent with respect to the construction, operation, and maintenance of these units.
The Company and Georgia Power jointly own the 818-MW capacity Plant Scherer Unit 3. Plant Scherer is a generating plant located near Forsyth, Georgia. In accordance with the operating agreement, Georgia Power acts as the Company's agent with respect to the construction, operation, and maintenance of the unit.
At December 31, 2016, the Company's percentage ownership and investment in these jointly-owned facilities were as follows:
 
Plant Scherer
Unit 3 (coal)
 Plant Daniel Units 1 & 2 (coal)
 (in millions)
Plant in service$398
  $680
Accumulated depreciation143
  202
Construction work in progress7
  7
Company ownership25%  50%
The Company's proportionate share of its plant operating expenses is included in the corresponding operating expenses in the statements of income and the Company is responsible for providing its own financing.
5. INCOME TAXES
On behalf of the Company, Southern Company files a consolidated federal income tax return and various combined and separate state income tax returns. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Current and Deferred Income Taxes
Details of income tax provisions are as follows:
 2016 2015 2014
 (in millions)
Federal -     
Current$34
 $(3) $23
Deferred45
 80
 52
 79
 77
 75
State -     
Current
 5
 
Deferred12
 10
 13
 12
 15
 13
Total$91
 $92
 $88
The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 2016 2015
 (in millions)
Deferred tax liabilities-   
Accelerated depreciation$834
 $812
Property basis differences123
 133
Pension and other employee benefits58
 39
Regulatory assets45
 16
Regulatory assets associated with employee benefit obligations65
 59
Regulatory assets associated with asset retirement obligations55
 40
Other12
 10
Total1,192
 1,109
Deferred tax assets-   
Federal effect of state deferred taxes37
 33
Postretirement benefits26
 26
Pension and other employee benefits72
 65
Property reserve17
 15
Asset retirement obligations55
 40
Alternative minimum tax carryforward18
 18
Other19
 19
Total244
 216
Accumulated deferred income taxes$948
 $893
The application of bonus depreciation provisions in current tax law significantly increased deferred tax liabilities related to accelerated depreciation in 2016 and 2015.
At December 31, 2016, tax-related regulatory assets to be recovered from customers were $58 million. These assets are primarily attributable to tax benefits flowed through to customers in prior years, deferred taxes previously recognized at rates lower than the current enacted tax law, and taxes applicable to capitalized interest.
At December 31, 2016, the tax-related regulatory liabilities to be credited to customers were $2 million. These liabilities are primarily attributable to deferred taxes previously recognized at rates higher than the current enacted tax law and unamortized ITCs.

NOTES (continued)
Gulf Power Company 2016 Annual Report

In accordance with regulatory requirements, deferred federal ITCs are amortized over the average life of the related property with such amortization normally applied as a credit to reduce depreciation in the statements of income. Credits amortized in this manner are not material for the periods presented. At December 31, 2016, all ITCs available to reduce federal income taxes payable had been utilized.
Effective Tax Rate
A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 2016 2015 2014
Federal statutory rate35.0% 35.0% 35.0%
State income tax, net of federal deduction3.4 3.9 3.5
Non-deductible book depreciation0.6 0.5 0.4
Differences in prior years' deferred and current tax rates(0.1) (0.1) (0.1)
AFUDC equity (1.8) (1.8)
Other, net0.6 (0.6) 0.1
Effective income tax rate39.5% 36.9% 37.1%
The increase in the Company's 2016 effective tax rate is primarily the result of the decrease in nontaxable AFUDC equity.
On March 30, 2016, the FASB issued ASU 2016-09, which changes the accounting for income taxes for share-based payment award transactions. Entities are required to recognize all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation as income tax expense or benefit in the income statement. The adoption of ASU 2016-09 did not have a material impact on the Company's overall effective tax rate. See Note 1 under "Recently Issued Accounting Standards" for additional information.
Unrecognized Tax Benefits
The Company has no material unrecognized tax benefits for the periods presented. The Company classifies interest on tax uncertainties as interest expense. Accrued interest for unrecognized tax benefits was immaterial and the Company did not accrue any penalties on uncertain tax positions.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. The settlement of federal and state audits could impact the balances, but an estimate of the range of reasonably possible outcomes cannot be determined at this time.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2012. Southern Company has filed its 2013, 2014, and 2015 federal income tax returns and has received partial acceptance letters from the IRS; however, the IRS has not finalized its audits. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for the Company's state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2011.
6. FINANCING
Securities Due Within One Year
At December 31, 2016 and 2015, the Company had $87 million and $110 million of long-term debt due within one year, respectively.
Maturities through 2021 applicable to total long-term debt include $87 million in 2017 and $175 million in 2020. There are no scheduled maturities in 2018, 2019, or 2021.
Bank Term Loans
In May 2016, the Company entered into an 11-month floating rate bank loan bearing interest based on one-month LIBOR. This short-term loan was for $100 million aggregate principal amount and the proceeds were used to repay existing indebtedness and for working capital and other general corporate purposes.
This bank loan has a covenant that limits debt levels to 65% of total capitalization, as defined in the agreement. For purposes of this definition, debt excludes certain hybrid securities. At December 31, 2016, the Company was in compliance with its debt limit.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Senior Notes
At December 31, 2016 and 2015, the Company had a total of $777 million and $1.01 billion of senior notes outstanding, respectively. These senior notes are effectively subordinate to all secured debt of the Company, which totaled approximately $41 million at both December 31, 2016 and 2015.
In May 2016, the Company redeemed $125 million aggregate principal amount of its Series 2011A 5.75% Senior Notes due June 1, 2051.
Pollution Control Revenue Bonds
Pollution control revenue bond obligations represent loans to the Company from public authorities of funds derived from sales by such authorities of revenue bonds issued to finance pollution control and solid waste disposal facilities. The Company is required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. The amount of tax-exempt pollution control revenue bond obligations outstanding at December 31, 2016 and 2015 was $309 million.
Outstanding Classes of Capital Stock
The Company currently has preferred stock, Class A preferred stock, preference stock, and common stock authorized. The Company's preferred stock and Class A preferred stock, without preference between classes, rank senior to the Company's preference stock and common stock with respect to payment of dividends and voluntary or involuntary dissolution. No shares of preferred stock or Class A preferred stock were outstanding at December 31, 2016. The Company's preference stock ranks senior to the common stock with respect to the payment of dividends and voluntary or involuntary dissolution. Certain series of the preference stock are subject to redemption at the option of the Company on or after a specified date (typically five or 10 years after the date of issuance) at a redemption price equal to 100% of the liquidation amount of the preference stock. In addition, certain series of the preference stock may be redeemed earlier at a redemption price equal to 100% of the liquidation amount plus a make-whole premium based on the present value of the liquidation amount and future dividends.
In January 2015, the Company issued 200,000 shares of common stock to Southern Company and realized proceeds of $20 million. The proceeds were used to repay a portion of the Company's short-term debt and for other general corporate purposes, including the Company's continuous construction program.
Subsequent to December 31, 2016, the Company issued 1,750,000 shares of common stock to Southern Company and realized proceeds of $175 million. The proceeds were used for general corporate purposes, including the Company's continuous construction program.
Dividend Restrictions
The Company can only pay dividends to Southern Company out of retained earnings or paid-in-capital.
Assets Subject to Lien
The Company has granted a lien on its property at Plant Daniel in connection with the issuance of two series of pollution control revenue bonds with an aggregate outstanding principal amount of $41 million as of December 31, 2016. There are no agreements or other arrangements among the Southern Company system companies under which the assets of one company have been pledged or otherwise made available to satisfy obligations of Southern Company or any of its subsidiaries.
Bank Credit Arrangements
At December 31, 2016, committed credit arrangements with banks were as follows:
Expires     
Executable
Term Loans
 Expires Within One Year
20172018 Total Unused 
One
Year
 
Two
Years
 Term Out No Term Out
(in millions) (in millions) (in millions) (in millions)
$85
$195
 $280
 $280
 $45
 $
 $25
 $60
Most of the bank credit arrangements require payment of commitment fees based on the unused portion of the commitments. Commitment fees average less than 1/4 of 1% for the Company.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Subject to applicable market conditions, the Company expects to renew or replace its bank credit arrangements as needed, prior to expiration. In connection therewith, the Company may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
Most of these bank credit arrangements contain covenants that limit the Company's debt level to 65% of total capitalization, as defined in the arrangements. For purposes of these definitions, debt excludes certain hybrid securities. At December 31, 2016, the Company was in compliance with these covenants.
Most of the $280 million of unused credit arrangements with banks provide liquidity support to the Company's pollution control revenue bonds and commercial paper program. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support as of December 31, 2016 was approximately $82 million. In addition, at December 31, 2016, the Company had $86 million of fixed rate pollution control revenue bonds outstanding that were required to be remarketed within the next 12 months.
For short-term cash needs, the Company borrows primarily through a commercial paper program that has the liquidity support of the Company's committed bank credit arrangements described above. The Company may also borrow through various other arrangements with banks. Commercial paper and short-term bank loans are included in notes payable in the balance sheets.
Details of short-term borrowings were as follows:
 
Short-term Debt at the
End of the Period
 Amount Outstanding Weighted Average Interest Rate
 (in millions)  
December 31, 2016:   
  Commercial paper$168
 1.1%
  Short-term bank debt100
 1.5%
Total$268
 1.2%
December 31, 2015:   
  Commercial paper$142
 0.7%
7. COMMITMENTS
Fuel and Purchased Power Agreements
To supply a portion of the fuel requirements of its generating plants, the Company has entered into various long-term commitments for the procurement and delivery of fossil fuel which are not recognized on the balance sheets. In 2016, 2015, and 2014, the Company incurred fuel expense of $432 million, $445 million, and $605 million, respectively, the majority of which was purchased under long-term commitments. The Company expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
In addition, the Company has entered into various long-term commitments for the purchase of capacity, energy, and transmission, some of which are accounted for as operating leases. The energy-related costs associated with PPAs are recovered through the fuel cost recovery clause. The capacity and transmission-related costs associated with PPAs are recovered through the purchased power capacity cost recovery clause. Capacity expense under a PPA accounted for as an operating lease was $75 million for both 2016 and 2015 and $50 million for 2014.

NOTES (continued)
Gulf Power Company 2016 Annual Report

Estimated total minimum long-term commitments at December 31, 2016 were as follows:
 Operating Lease PPA
 (in millions)
2017$79
201879
201979
202079
202179
2022 and thereafter112
Total$507
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the Company and all of the other traditional electric operating companies and Southern Power. Under these agreements, each of the traditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with the Company and each of the other traditional electric operating companies to ensure the Company will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.
Operating Leases
In addition to the operating lease PPA discussed above, the Company has other operating lease agreements with various terms and expiration dates. Total rent expense was $9 million, $14 million, and $15 million for 2016, 2015, and 2014, respectively.
Estimated total minimum lease payments under these operating leases at December 31, 2016 were as follows:
 Minimum Lease Payments
 
Barges &
Railcars
 Other Total
 (in millions)
2017$7
 $1
 $8
20185
 1
 6
2019
 1
 1
2020
 
 
2021
 
 
2022 and thereafter
 1
 1
Total$12
 $4
 $16
The Company and Mississippi Power jointly entered into an operating lease agreement for aluminum railcars for the transportation of coal to Plant Daniel. The Company has the option to purchase the railcars at the greater of lease termination value or fair market value or to renew the leases at the end of the lease term. The Company and Mississippi Power also have separate lease agreements for other railcars that do not include purchase options. The Company's 50% share of the lease costs, charged to fuel inventory and recovered through the retail fuel cost recovery clause, was $2 million in both 2016 and 2015 and $3 million in 2014. The Company's total annual railcar lease payments for 2017 are $2 million and are immaterial for 2018 through 2020.
In addition to railcar leases, the Company has operating lease agreements for barges and towboats for the transport of coal to Plant Crist. The Company has the option to renew the leases at the end of the lease term. The Company's lease costs, charged to fuel inventory and recovered through the retail fuel cost recovery clause, were $5 million in 2016 and $10 million in both 2015 and 2014. The Company's annual barge and towboat payments for 2017 and 2018 are expected to be approximately $5 million each year.

NOTES (continued)
Gulf Power Company 2016 Annual Report

8. STOCK COMPENSATION
Stock-Based Compensation
Stock-based compensation primarily in the form of Southern Company performance share units may be granted through the Omnibus Incentive Compensation Plan to a large segment of the Company's employees ranging from line management to executives. As of December 31, 2016, there were 184 current and former employees participating in the stock option and performance share unit programs.
Stock Options
Through 2009, stock-based compensation granted to employees consisted exclusively of non-qualified stock options. The exercise price for stock options granted equaled the stock price of Southern Company common stock on the date of grant. Stock options vest on a pro rata basis over a maximum period of three years from the date of grant or immediately upon the retirement or death of the employee. Options expire no later than 10 years after the grant date. All unvested stock options vest immediately upon a change in control where Southern Company is not the surviving corporation. Compensation expense is generally recognized on a straight-line basis over the three-year vesting period with the exception of employees that are retirement eligible at the grant date and employees that will become retirement eligible during the vesting period. Compensation expense in those instances is recognized at the grant date for employees that are retirement eligible and through the date of retirement eligibility for those employees that become retirement eligible during the vesting period. In 2015, Southern Company discontinued the granting of stock options.
The weighted average grant-date fair value of stock options granted during 2014 derived using the Black-Scholes stock option pricing model was $2.20.
The compensation cost related to the grant of Southern Company stock options to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. Compensation cost and related tax benefits recognized in the Company's financial statements were not material for any year presented. As of December 31, 2016, the amount of unrecognized compensation cost related to stock option awards not yet vested was immaterial.
The total intrinsic value of options exercised during the years ended December 31, 2016, 2015, and 2014 was $3 million, $2 million, and $5 million, respectively. No cash proceeds are received by the Company upon the exercise of stock options. The actual tax benefit realized by the Company for the tax deductions from stock option exercises totaled $1 million for the years ended December 31, 2016 and 2015 and $2 million for 2014. Prior to the adoption of ASU 2016-09, the excess tax benefits related to the exercise of stock options were recognized in the Company's financial statements with a credit to equity. Upon the adoption of ASU 2016-09, beginning in 2016, all tax benefits related to the exercise of stock options are recognized in income. As of December 31, 2016, the aggregate intrinsic value for the options outstanding and options exercisable was $6 million and $5 million, respectively.
Performance Share Units
From 2010 through 2014, stock-based compensation granted to employees included performance share units in addition to stock options. Beginning in 2015, stock-based compensation consisted exclusively of performance share units. Performance share units granted to employees vest at the end of a three-year performance period. All unvested performance share units vest immediately upon a change in control where Southern Company is not the surviving corporation. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of performance share units granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
The performance goal for all performance share units issued from 2010 through 2014 was based on the total shareholder return (TSR) for Southern Company common stock during the three-year performance period as compared to a group of industry peers. For these performance share units, at the end of three years, active employees receive shares based on Southern Company's performance while retired employees receive a pro rata number of shares based on the actual months of service during the performance period prior to retirement. The fair value of TSR-based performance share unit awards is determined as of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among the industry peers over the performance period. The Company recognizes compensation expense on a straight-line basis over the three-year performance period without remeasurement.
Beginning in 2015, Southern Company issued two additional types of performance share units to employees in addition to the TSR-based awards. These included performance share units with performance goals based on cumulative earnings per share

NOTES (continued)
Gulf Power Company 2016 Annual Report

(EPS) over the performance period and performance share units with performance goals based on Southern Company's equity-weighted ROE over the performance period. The EPS-based and ROE-based awards each represent 25% of total target grant date fair value of the performance share unit awards granted. The remaining 50% of the target grant date fair value consists of TSR-based awards. In contrast to the Monte Carlo simulation model used to determine the fair value of the TSR-based awards, the fair values of the EPS-based awards and the ROE-based awards are based on the closing stock price of Southern Company common stock on the date of the grant. Compensation expense for the EPS-based and ROE-based awards is generally recognized ratably over the three-year performance period initially assuming a 100% payout at the end of the performance period. The TSR-based performance share units, along with the EPS-based and ROE-based awards, vest immediately upon the retirement of the employee. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. The expected payout related to the EPS-based and ROE-based awards is reevaluated annually with expense recognized to date increased or decreased based on the number of shares currently expected to be issued. Unlike the TSR-based awards, the compensation expense ultimately recognized for the EPS-based awards and the ROE-based awards will be based on the actual number of shares issued at the end of the performance period.
For the years ended December 31, 2016, 2015, and 2014, employees of the Company were granted performance share units of 57,333, 48,962, and 37,829, respectively. The weighted average grant-date fair value of TSR-based performance share units granted during 2016, 2015, and 2014, determined using a Monte Carlo simulation model to estimate the TSR of Southern Company's stock among the industry peers over the performance period, was $45.18, $46.38, and $37.54, respectively. The weighted average grant-date fair value of both EPS-based and ROE-based performance share units granted during 2016 and 2015 was $48.83 and $47.75, respectively.
For the years ended December 31, 2016, 2015, and 2014, total compensation cost for performance share units recognized in income was $3 million, $2 million, and $1 million, respectively. The related tax benefit also recognized in income was $1 million in 2016 and 2015 and immaterial in 2014. The compensation cost related to the grant of Southern Company performance share units to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. As of December 31, 2016, $2 million of total unrecognized compensation cost related to performance share award units will be recognized over a weighted-average period of approximately 22 months.
9. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of the Company of what a market participant would use in pricing an asset or liability. If there is little available market data, then the Company's own assumptions are the best available information.
In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.

NOTES (continued)
Gulf Power Company 2016 Annual Report

As of December 31, 2016, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Cash equivalents$20
 $
 $
 $20
Energy-related derivatives
 5
 
 5
Total$20
 $5
 $
 $25
Liabilities:       
Energy-related derivatives$
 $29
 $
 $29
As of December 31, 2015, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets 
Significant
Other
Observable
Inputs
 
Significant
Unobservable
Inputs
  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Interest rate derivatives$
 $1
 $
 $1
Cash equivalents18
 
 
 18
Total$18
 $1
 $
 $19
Liabilities:       
Energy-related derivatives$
 $100
 $
 $100
Valuation Methodologies
The energy-related derivatives primarily consist of over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard over-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflect the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk and occasionally, implied volatility of interest rate options. The interest rate derivatives are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 10 for additional information on how these derivatives are used.

NOTES (continued)
Gulf Power Company 2016 Annual Report

As of December 31, 2016 and 2015, other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt:   
2016$1,074
 $1,097
2015$1,303
 $1,339
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates available to the Company.
10. DERIVATIVES
The Company is exposed to market risks, primarily commodity price risk and interest rate risk. To manage the volatility attributable to these exposures, the Company nets its exposures, where possible, to take advantage of natural offsets and may enter into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 9 for additional information. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.
Energy-Related Derivatives
The Company enters into energy-related derivatives to hedge exposures to electricity, gas, and other fuel price changes. However, due to cost-based rate regulations and other various cost recovery mechanisms, the Company has limited exposure to market volatility in energy-related commodity prices. The Company manages fuel-hedging programs, implemented per the guidelines of the Florida PSC, through the use of financial derivative contracts, which is expected to continue to mitigate price volatility. The Florida PSC approved a stipulation and agreement that prospectively imposed a moratorium on the Company's fuel-hedging program in October 2016 through December 31, 2017. The moratorium does not have an impact on the recovery of existing hedges entered into under the previously-approved hedging program.
Energy-related derivative contracts are accounted for under one of three methods:
Regulatory Hedges — Energy-related derivative contracts which are designated as regulatory hedges relate primarily to the Company's fuel-hedging programs, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through the fuel cost recovery clause.
Cash Flow Hedges — Gains and losses on energy-related derivatives designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales) are initially deferred in OCI before being recognized in the statements of income in the same period as the hedged transactions are reflected in earnings.
Not Designated — Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric industry. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2016, the net volume of energy-related derivative contracts for natural gas positions totaled 51 million mmBtu for the Company, with the longest hedge date of 2020 over which it is hedging its exposure to the variability in future cash flows for forecasted transactions.
Interest Rate Derivatives
The Company may also enter into interest rate derivatives to hedge exposure to changes in interest rates. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the

NOTES (continued)
Gulf Power Company 2016 Annual Report

derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time the hedged transactions affect earnings. The derivatives employed as hedging instruments are structured to minimize ineffectiveness, which is recorded directly to earnings.
At December 31, 2016, the following interest rate derivative was outstanding:
 Notional
Amount
 Interest
Rate
Received
 Weighted Average Interest
Rate Paid
 Hedge
Maturity
Date
 Fair Value
Gain (Loss)
December 31,
2016
 (in millions)       (in millions)
Cash Flow Hedges of Forecasted Debt        
 $80
 3-month LIBOR 2.32% December 2026 $
The estimated pre-tax losses that will be reclassified from accumulated OCI to interest expense for the 12-month period ending December 31, 2017 are immaterial. The Company has deferred gains and losses that are expected to be amortized into earnings through 2026.
Derivative Financial Statement Presentation and Amounts
The Company enters into energy-related and interest rate derivative contracts that may contain certain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. At December 31, 2016, fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with the counterparties. At December 31, 2015, the fair value amounts of derivative instruments were presented gross on the balance sheets.
At December 31, 2016 and 2015, the fair value of energy-related derivatives and interest rate derivatives was reflected in the balance sheets as follows:
 20162015
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 (in millions)
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Other current assets/Liabilities from risk management activities$4
$12
$
$49
Other deferred charges and assets/Other deferred credits and liabilities1
17

51
Total derivatives designated as hedging instruments for regulatory purposes$5
$29
$
$100
Derivatives designated as hedging instruments in cash flow and fair value hedges    
Interest rate derivatives:    
Other current assets/Liabilities from risk management activities

1

Gross amounts recognized$5
$29
$1
$100
Gross amounts offset$(4)$(4)$
$
Net amounts recognized in the Balance Sheets(*)
$1
$25
$1
$100
(*)At December 31, 2015, the fair value amounts for derivative contracts subject to netting arrangements were presented gross on the balance sheet.
Energy-related derivatives not designated as hedging instruments were immaterial on the balance sheets for 2016 and 2015.

NOTES (continued)
Gulf Power Company 2016 Annual Report

At December 31, 2016 and 2015, the pre-tax effects of unrealized derivative gains (losses) arising from energy-related derivatives designated as regulatory hedging instruments and deferred were as follows:
 Unrealized Losses Unrealized Gains
Derivative Category
Balance Sheet
Location
2016 2015 
Balance Sheet
Location
2016 2015
  (in millions)  (in millions)
Energy-related derivatives:(*)
Other regulatory assets, current$(9) $(49) Other regulatory liabilities, current$1
 $
 Other regulatory assets, deferred(16) (51) Other regulatory liabilities, deferred
 
Total energy-related derivative gains (losses) $(25) $(100)  $1
 $
(*)At December 31, 2016, the unrealized gains and losses for derivative contracts subject to netting arrangements were presented net on the balance sheet. At December 31, 2015, the unrealized gains and losses for derivative contracts were presented gross on the balance sheet.
For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of interest rate derivatives designated as cash flow hedging instruments on the statements of income were as follows:
Derivatives in Cash
Flow Hedging Relationships
Gain (Loss) Recognized in
OCI on Derivative
 
Gain (Loss) Reclassified from Accumulated
OCI into Income (Effective Portion)
(Effective Portion)  Amount
Derivative Category2016 2015 2014 Statements of Income Location2016 2015 2014
 (in millions)  (in millions)
Interest rate derivatives$
 $1
 $
 Interest expense, net of amounts capitalized$(1) $(1) $(1)
There was no material ineffectiveness recorded in earnings for any period presented.
For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of energy-related derivatives not designated as hedging instruments on the statements of income were not material.
Contingent Features
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain affiliated companies. At December 31, 2016, the Company's collateral posted with its derivative counterparties was not material.
At December 31, 2016, the fair value of derivative liabilities with contingent features, including certain agreements that could require collateral in the event that one or more Southern Company system power pool participants has a credit rating change to below investment grade because of joint and several liability features underlying these derivatives, was immaterial.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. The Company has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk. Therefore, the Company does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance.

NOTES (continued)
Gulf Power Company 2016 Annual Report

11. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Summarized quarterly financial information for 2016 and 2015 is as follows:
Quarter Ended
Operating
Revenues
 
Operating
Income
 Net Income After Dividends on Preference Stock
 (in millions)
March 2016$335
 $65
 $29
June 2016365
 74
 34
September 2016436
 90
 45
December 2016349
 54
 23
      
March 2015$357
 $72
 $37
June 2015384
 69
 35
September 2015429
 91
 48
December 2015313
 58
 28
In accordance with the adoption of ASU 2016-09 (see Note 1 under "Recently Issued Accounting Standards"), previously reported amounts for income tax expense were reduced by an immaterial amount for the first, second, and third quarters of 2016.
The Company's business is influenced by seasonal weather conditions.

SELECTED FINANCIAL AND OPERATING DATA 2012-2016
Gulf Power Company 2016 Annual Report

 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions)$1,485
 $1,483
 $1,590
 $1,440
 $1,440
Net Income After Dividends
on Preference Stock (in millions)
$131
 $148
 $140
 $124
 $126
Cash Dividends
on Common Stock (in millions)
$120
 $130
 $123
 $115
 $116
Return on Average Common Equity (percent)9.52
 11.11
 11.02
 10.30
 10.92
Total Assets (in millions)(a)(b)
$4,822
 $4,920
 $4,697
 $4,321
 $4,167
Gross Property Additions (in millions)$179
 $247
 $361
 $305
 $325
Capitalization (in millions):         
Common stock equity$1,389
 $1,355
 $1,309
 $1,235
 $1,181
Preference stock147
 147
 147
 147
 98
Long-term debt(a)
987
 1,193
 1,362
 1,150
 1,178
Total (excluding amounts due within one year)$2,523
 $2,695
 $2,818
 $2,532
 $2,457
Capitalization Ratios (percent):         
Common stock equity55.1
 50.3
 46.5
 48.8
 48.1
Preference stock5.8
 5.4
 5.2
 5.8
 4.0
Long-term debt(a)
39.1
 44.3
 48.3
 45.4
 47.9
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential398,501
 393,149
 388,292
 383,980
 379,922
Commercial56,091
 55,460
 54,892
 54,567
 53,808
Industrial254
 248
 260
 260
 264
Other569
 614
 603
 582
 577
Total455,415
 449,471
 444,047
 439,389
 434,571
Employees (year-end)1,352
 1,391
 1,384
 1,410
 1,416
(a)A reclassification of debt issuance costs from Total Assets to Long-term debt of $8 million, $8 million, and $8 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(b)A reclassification of deferred tax assets from Total Assets of $3 million, $8 million, and $2 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.


SELECTED FINANCIAL AND OPERATING DATA 2012-2016 (continued)
Gulf Power Company 2016 Annual Report

 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions):         
Residential$714
 $698
 $700
 $632
 $609
Commercial410
 403
 408
 395
 390
Industrial152
 144
 153
 139
 140
Other5
 4
 6
 4
 5
Total retail1,281
 1,249
 1,267
 1,170
 1,144
Wholesale — non-affiliates61
 107
 129
 109
 107
Wholesale — affiliates75
 58
 130
 100
 124
Total revenues from sales of electricity1,417
 1,414
 1,526
 1,379
 1,375
Other revenues68
 69
 64
 61
 65
Total$1,485
 $1,483
 $1,590
 $1,440
 $1,440
Kilowatt-Hour Sales (in millions):         
Residential5,358
 5,365
 5,362
 5,089
 5,054
Commercial3,869
 3,898
 3,838
 3,810
 3,859
Industrial1,830
 1,798
 1,849
 1,700
 1,725
Other25
 25
 26
 21
 25
Total retail11,082
 11,086
 11,075
 10,620
 10,663
Wholesale — non-affiliates751
 1,040
 1,670
 1,163
 977
Wholesale — affiliates2,784
 1,906
 3,284
 3,127
 4,370
Total14,617
 14,032
 16,029
 14,910
 16,010
Average Revenue Per Kilowatt-Hour (cents):         
Residential13.33
 13.01
 13.06
 12.43
 12.06
Commercial10.60
 10.34
 10.64
 10.37
 10.11
Industrial8.31
 8.01
 8.28
 8.15
 8.14
Total retail11.56
 11.27
 11.44
 11.02
 10.73
Wholesale3.85
 5.60
 5.23
 4.87
 4.31
Total sales9.69
 10.08
 9.52
 9.25
 8.59
Residential Average Annual         
Kilowatt-Hour Use Per Customer13,515
 13,705
 13,865
 13,301
 13,303
Residential Average Annual         
Revenue Per Customer$1,801
 $1,783
 $1,811
 $1,653
 $1,604
Plant Nameplate Capacity         
Ratings (year-end) (megawatts)2,278
 2,583
 2,663
 2,663
 2,663
Maximum Peak-Hour Demand (megawatts):         
Winter2,033
 2,488
 2,684
 1,729
 2,130
Summer2,503
 2,491
 2,424
 2,356
 2,344
Annual Load Factor (percent)54.7
 54.9
 51.1
 55.9
 56.3
Plant Availability Fossil-Steam (percent)81.0
 88.3
 89.4
 92.8
 82.5
Source of Energy Supply (percent):         
Coal31.0
 33.5
 44.5
 36.4
 34.6
Gas23.2
 25.6
 22.2
 23.0
 23.5
Purchased power —         
From non-affiliates41.1
 30.4
 28.9
 37.0
 40.2
From affiliates4.7
 10.5
 4.4
 3.6
 1.7
Total100.0
 100.0
 100.0
 100.0
 100.0

MISSISSIPPI POWER COMPANY
FINANCIAL SECTION

MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Mississippi Power Company 2016 Annual Report
The management of Mississippi Power Company (the Company) is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of the Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2016.
/s/ Anthony L. Wilson
Anthony L. Wilson
Chairman, President, and Chief Executive Officer
/s/ Moses H. Feagin
Moses H. Feagin
Vice President, Chief Financial Officer, and Treasurer
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Company Gas as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
We did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment which is accounted for by the use of the equity method. The accompanying consolidated financial statements of Southern Company Gas include its equity investment in SNG of $1,137 million and $1,261 million as of December 31, 2019 and December 31, 2018, respectively, and its earnings from its equity method investment in SNG of $141 million, $131 million, and $88 million for the years ended December 31, 2019, 2018, and 2017, respectively. Those statements were audited by other auditors whose reports (which express unqualified opinions on SNG's financial statements and contain an emphasis of matter paragraph calling attention to SNG's significant transactions with related parties) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the reports of the other auditors.
Basis for Opinion
These financial statements are the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion on Southern Company Gas' financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company Gas in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Company Gas is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Company Gas' internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the reports of the other auditors provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company Gas' auditor since 2016.

CONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Operating Revenues:      
Natural gas revenues (includes revenue taxes of $117, $114, and $100
for the periods presented, respectively)
 $3,793
 $3,874
 $3,787
Alternative revenue programs (1) (20) 4
Other revenues 
 55
 129
Total operating revenues 3,792
 3,909
 3,920
Operating Expenses:      
Cost of natural gas 1,319
 1,539
 1,601
Cost of other sales 
 12
 29
Other operations and maintenance 888
 981
 945
Depreciation and amortization 487
 500
 501
Taxes other than income taxes 213
 211
 184
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Total operating expenses 3,022
 2,994
 3,260
Operating Income 770
 915
 660
Other Income and (Expense):      
Earnings from equity method investments 157
 148
 106
Interest expense, net of amounts capitalized (232) (228) (200)
Other income (expense), net 20
 1
 44
Total other income and (expense) (55) (79) (50)
Earnings Before Income Taxes 715
 836
 610
Income taxes 130
 464
 367
Net Income $585
 $372
 $243
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Net Income $585
 $372
 $243
Other comprehensive income (loss):      
Qualifying hedges:      
Changes in fair value, net of tax of $(2), $2, and $(3), respectively (5) 5
 (5)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $(1), and $-, respectively
 2
 (1) 1
Pension and other postretirement benefit plans:      
Benefit plan net gain (loss), net of tax of $(14), $-, and $-, respectively (16) 
 (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $3, and $-, respectively
 
 (2) 
Total other comprehensive income (loss) (19) 2
 (5)
Comprehensive Income $566
 $374
 $238
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
Southern Company Gas and Subsidiary Companies 2019 Annual Report
  2019 2018 2017
  (in millions)
Operating Activities:      
Net income $585
 $372
 $243
Adjustments to reconcile net income to net cash
provided from operating activities —
      
Depreciation and amortization, total 487
 500
 501
Deferred income taxes 213
 (1) 236
Pension and postretirement funding (145) 
 
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Mark-to-market adjustments (56) (19) (24)
Other, net (55) (24) (51)
Changes in certain current assets and liabilities —      
-Receivables 467
 (218) (94)
-Natural gas for sale 44
 49
 36
-Prepaid income taxes 40
 (42) (39)
-Other current assets 31
 4
 (24)
-Accounts payable (520) 372
 (20)
-Accrued taxes (69) 10
 110
-Accrued compensation 1
 32
 15
-Other current liabilities (71) (22) (8)
Net cash provided from operating activities 1,067
 764
 881
Investing Activities:      
Property additions (1,408) (1,388) (1,514)
Cost of removal, net of salvage (82) (96) (66)
Change in construction payables, net 24
 (37) 72
Investments in unconsolidated subsidiaries (31) (110) (145)
Returned investment in unconsolidated subsidiaries 67
 20
 80
Proceeds from dispositions and asset sales 32
 2,609
 
Other investing activities 12
 
 5
Net cash provided from (used for) investing activities (1,386) 998
 (1,568)
Financing Activities:      
Increase (decrease) in notes payable, net 
 (868) 262
Proceeds —      
First mortgage bonds 300
 300
 400
Capital contributions from parent company 821
 24
 103
Senior notes 
 
 450
Redemptions and repurchases —      
Gas facility revenue bonds 
 (200) 
Medium-term notes 
 
 (22)
First mortgage bonds (50) 
 
Senior notes (300) (155) 
Return of capital to parent company 
 (400) 
Payment of common stock dividends (471) (468) (443)
Other financing activities (2) (3) (9)
Net cash provided from (used for) financing activities 298
 (1,770) 741
Net Change in Cash, Cash Equivalents, and Restricted Cash (21) (8) 54
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year 70
 78
 24
Cash, Cash Equivalents, and Restricted Cash at End of Year $49
 $70
 $78
Supplemental Cash Flow Information:      
Cash paid (received) during the period for —      
Interest (net of $6, $7, and $11 capitalized, respectively) $251
 $249
 $223
Income taxes (net of refunds) (41) 524
 72
Noncash transactions — Accrued property additions at year-end 122
 97
 135
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Assets 2019 2018
  (in millions)
Current Assets:    
Cash and cash equivalents $46
 $64
Receivables —    
Energy marketing receivable 428
 801
Customer accounts receivable 323
 370
Unbilled revenues 183
 213
Affiliated 5
 11
Other accounts and notes receivable 114
 142
Accumulated provision for uncollectible accounts (18) (30)
Natural gas for sale 479
 524
Prepaid expenses 65
 118
Assets from risk management activities, net of collateral 177
 219
Other regulatory assets 92
 73
Assets held for sale 171
 
Other current assets 41
 50
Total current assets 2,106
 2,555
Property, Plant, and Equipment:    
In service 16,344
 15,177
Less: Accumulated depreciation 4,650
 4,400
Plant in service, net of depreciation 11,694
 10,777
Construction work in progress 613
 580
Total property, plant, and equipment 12,307
 11,357
Other Property and Investments:    
Goodwill 5,015
 5,015
Equity investments in unconsolidated subsidiaries 1,251
 1,538
Other intangible assets, net of amortization of $176 and $145
at December 31, 2019 and December 31, 2018, respectively
 70
 101
Miscellaneous property and investments 20
 20
Total other property and investments 6,356
 6,674
Deferred Charges and Other Assets:    
Operating lease right-of-use assets, net of amortization 93
 
Other regulatory assets, deferred 618
 669
Other deferred charges and assets 207
 193
Total deferred charges and other assets 918
 862
Total Assets $21,687
 $21,448
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholder's Equity 2019 2018
  (in millions)
Current Liabilities:    
Securities due within one year $
 $357
Notes payable 650
 650
Energy marketing trade payables 442
 856
Accounts payable —    
Affiliated 41
 45
Other 315
 402
Customer deposits 96
 133
Accrued taxes —    
Accrued income taxes 
 66
Other accrued taxes 71
 75
Accrued interest 52
 55
Accrued compensation 100
 100
Liabilities from risk management activities, net of collateral 21
 76
Other regulatory liabilities 94
 79
Other current liabilities 128
 130
Total current liabilities 2,010
 3,024
Long-term Debt (See accompanying statements)
 5,845
 5,583
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 1,219
 1,016
Deferred credits related to income taxes 874
 940
Employee benefit obligations 265
 357
Operating lease obligations 78
 
Other cost of removal obligations 1,606
 1,585
Accrued environmental remediation 233
 268
Other deferred credits and liabilities 51
 105
Total deferred credits and other liabilities 4,326
 4,271
Total Liabilities 12,181
 12,878
Common Stockholder's Equity (See accompanying statements)
 9,506
 8,570
Total Liabilities and Stockholder's Equity $21,687
 $21,448
Commitments and Contingent Matters (See notes)
 

 

The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$300
  
20214.01%330
330
  
20228.63%46
46
  
20232.45%350
350
  
2025-20474.68%3,134
3,134
  
Total long-term notes payable 3,860
4,160
  
Other long-term debt —     
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026-20593.94%1,525
1,225
  
Total other long-term debt 1,575
1,325
  
Unamortized fair value adjustment of long-term debt 430
474
  
Unamortized debt discount (20)(19)  
Total long-term debt 5,845
5,940
  
Less amount due within one year 
357
  
Long-term debt excluding amount due within one year 5,845
5,583
38.1%39.4%
Common Stockholder's Equity:     
Common stock — par value $0.01 per share     
Authorized — 100 million shares     
Outstanding — 100 shares     
Paid-in capital 9,697
8,856
  
Accumulated deficit (198)(312)  
Accumulated other comprehensive income 7
26
  
Total common stockholder's equity 9,506
8,570
61.9
60.6
Total Capitalization $15,351
$14,153
100.0%100.0%

The accompanying notes are an integral part of these financial statements.

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Number of Common Shares
Issued
 Common Stock Paid-In Capital Retained Earnings (Accumulated Deficit) 
Accumulated
Other
Comprehensive Income (Loss)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $9,095
 $(12) $26
 $9,109
Net income
 
 
 243
 
 243
Capital contributions from parent company
 
 117
 
 
 117
Other comprehensive income (loss)
 
 
 
 (5) (5)
Cash dividends on common stock
 
 
 (443) 
 (443)
Other
 
 2
 
 (1) 1
Balance at December 31, 2017
 
 9,214
 (212) 20
 9,022
Net income
 
 
 372
 
 372
Return of capital to parent company
 
 (400) 
 
 (400)
Capital contributions from parent company
 
 42
 
 
 42
Other comprehensive income
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (468) 
 (468)
Other
 
 
 (4) 4
 
Balance at December 31, 2018
 
 8,856
 (312) 26
 8,570
Net income
 
 
 585
 
 585
Capital contributions from parent company
 
 841
 
 
 841
Other comprehensive income (loss)
 
 
 
 (19) (19)
Cash dividends on common stock
 
 
 (471) 
 (471)
Balance at December 31, 2019
 $
 $9,697
 $(198) $7
 $9,506

The accompanying notes are an integral part of these consolidated financial statements. 

COMBINED NOTES TO FINANCIAL STATEMENTS
Southern Company and Subsidiary Companies 2019 Annual Report




Notes to the Financial Statements
for
The Southern Company and Subsidiary Companies
Alabama Power Company
Georgia Power Company
STATEMENTS OF OPERATIONS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report


 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$877
 $889
 $854
Wholesale revenues, non-affiliates237
 263
 259
Wholesale revenues, affiliates132
 91
 56
Other revenues18
 22
 18
Total operating revenues1,264
 1,265
 1,187
Operating Expenses:     
Fuel407
 405
 395
Purchased power20
 41
 25
Other operations and maintenance283
 313
 291
Depreciation and amortization192
 169
 161
Taxes other than income taxes113
 107
 104
Estimated loss on Kemper IGCC24
 37
 3,362
Total operating expenses1,039
 1,072
 4,338
Operating Income (Loss)225
 193
 (3,151)
Other Income and (Expense):     
Allowance for equity funds used during construction1
 
 72
Interest expense, net of amounts capitalized(69) (76) (42)
Other income (expense), net12
 17
 1
Total other income and (expense)(56) (59) 31
Earnings (Loss) Before Income Taxes169
 134
 (3,120)
Income taxes (benefit)30
 (102) (532)
Net Income (Loss)139
 236
 (2,588)
Dividends on Preferred Stock
 1
 2
Net Income (Loss) After Dividends on Preferred Stock$139
 $235
 $(2,590)
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 2019 2018 2017
 (in millions)
Net Income (Loss)$139
 $236
 $(2,588)
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $(1), and $(1), respectively
 (1) (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $1, respectively
1
 1
 1
Total other comprehensive income (loss)1
 
 
Comprehensive Income (Loss)$140
 $236
 $(2,588)
The accompanying notes are an integral part of these financial statements.


STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income (loss)$139
 $236
 $(2,588)
Adjustments to reconcile net income (loss)
to net cash provided from operating activities —
     
Depreciation and amortization, total197
 177
 198
Deferred income taxes37
 475
 (727)
Allowance for equity funds used during construction(1) 
 (72)
Pension and postretirement funding(54) 
 
Settlement of asset retirement obligations(35) (35) (23)
Estimated loss on Kemper IGCC15
 33
 3,179
Other, net21
 18
 (8)
Changes in certain current assets and liabilities —     
-Receivables6
 (19) 540
-Fossil fuel stock(6) (3) 24
-Prepaid income taxes12
 (12) 
-Other current assets(2) (7) (13)
-Accounts payable3
 15
 (3)
-Accrued interest
 (1) (29)
-Accrued taxes11
 (46) 80
-Over recovered regulatory clause revenues16
 14
 (51)
-Other current liabilities(20) (41) (4)
Net cash provided from operating activities339
 804
 503
Investing Activities:     
Property additions(202) (188) (429)
Construction payables(1) 4
 (47)
Payments pursuant to LTSAs(23) (29) (10)
Other investing activities(37) (19) (18)
Net cash used for investing activities(263) (232) (504)
Financing Activities:     
Decrease in notes payable, net
 (4) (18)
Proceeds —     
Capital contributions from parent company51
 15
 1,002
Senior notes
 600
 
Long-term debt issuance to parent company
 
 40
Short-term borrowings
 300
 109
Pollution control revenue bonds43
 
 
Redemptions —     
Preferred stock
 (33) 
Pollution control revenue bonds
 (43) 
Short-term borrowings
 (300) (109)
Long-term debt to parent company
 
 (591)
Capital leases
 
 (71)
Senior notes(25) (155) (35)
Other long-term debt
 (900) (300)
Return of capital to parent company(150) 
 
Other financing activities(2) (7) (2)
Net cash provided from (used for) financing activities(83) (527) 25
Net Change in Cash, Cash Equivalents, and Restricted Cash(7) 45
 24
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year293
 248
 224
Cash, Cash Equivalents, and Restricted Cash at End of Year$286
 $293
 $248
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $(1), $-, and $29 capitalized, respectively)$71
 $80
 $65
Income taxes (net of refunds)(27) (525) (424)
Noncash transactions — Accrued property additions at year-end35
 35
 32
The accompanying notes are an integral part of these financial statements. 

BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$286
 $293
Receivables —   
Customer accounts receivable35
 34
Unbilled revenues39
 41
Affiliated27
 21
Other accounts and notes receivable26
 31
Fossil fuel stock26
 20
Materials and supplies61
 53
Other regulatory assets99
 116
Prepaid income taxes
 12
Other current assets10
 7
Total current assets609
 628
Property, Plant, and Equipment:   
In service4,857
 4,900
Less: Accumulated provision for depreciation1,463
 1,429
Plant in service, net of depreciation3,394
 3,471
Construction work in progress126
 103
Total property, plant, and equipment3,520
 3,574
Other Property and Investments131
 24
Deferred Charges and Other Assets:   
Deferred charges related to income taxes32
 33
Regulatory assets – asset retirement obligations210
 143
Other regulatory assets, deferred360
 331
Accumulated deferred income taxes139
 150
Other deferred charges and assets34
 3
Total deferred charges and other assets775
 660
Total Assets$5,035
 $4,886
The accompanying notes are an integral part of these financial statements.


BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$281
 $40
Accounts payable —   
Affiliated76
 60
Other75
 90
Accrued taxes105
 95
Accrued interest15
 15
Accrued compensation35
 38
Accrued plant closure costs15
 29
Asset retirement obligations33
 34
Other regulatory liabilities21
 12
Over recovered regulatory clause liabilities29
 14
Other current liabilities49
 28
Total current liabilities734
 455
Long-Term Debt (See accompanying statements)
1,308
 1,539
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes424
 378
Deferred credits related to income taxes352
 382
Employee benefit obligations99
 115
Asset retirement obligations, deferred157
 126
Other cost of removal obligations189
 185
Other regulatory liabilities, deferred76
 81
Other deferred credits and liabilities44
 16
Total deferred credits and other liabilities1,341
 1,283
Total Liabilities3,383
 3,277
Common Stockholder's Equity (See accompanying statements)
1,652
 1,609
Total Liabilities and Stockholder's Equity$5,035
 $4,886
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.

STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Due 2028-20424.16%$950
$950
  
Adjustable rate due 20202.59%275
300
  
Total long-term notes payable 1,225
1,250
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20283.20%43

  
Variable rate due 20201.80%7
40
  
Variable rate due 2025-20281.80%33

  
Plant Daniel revenue bonds due 20217.13%270
270
  
Total other long-term debt 353
310
  
Unamortized debt premium (discount), net 19
27
  
Unamortized debt issuance expense (8)(8)  
Total long-term debt 1,589
1,579
  
Less amount due within one year 281
40
  
Long-term debt excluding amount due within one year 1,308
1,539
44.2%48.9%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 1,130,000 shares 

  
Outstanding — 1,121,000 shares 38
38
  
Paid-in capital 4,449
4,546
  
Accumulated deficit (2,832)(2,971)  
Accumulated other comprehensive loss (3)(4)  
Total common stockholder's equity 1,652
1,609
55.8
51.1
Total Capitalization $2,960
$3,148
100.0%100.0%
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Mississippi Power Company 2019 Annual Report

 Number of Common Shares Issued 
Common
Stock
 Paid-In Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss) Total
 (in millions)
Balance at December 31, 20161
 $38
 $3,525
 $(616) $(4) $2,943
Net loss after dividends on preferred stock
 
 
 (2,590) 
 (2,590)
Capital contributions from parent company
 
 1,004
 
 
 1,004
Other
 
 
 1
 
 1
Balance at December 31, 20171
 38
 4,529
 (3,205) (4) 1,358
Net income after dividends on preferred stock
 
 
 235
 
 235
Capital contributions from parent company
 
 17
 
 
 17
Other
 
 
 (1) 
 (1)
Balance at December 31, 20181
 38
 4,546
 (2,971) (4) 1,609
Net income after dividends on preferred stock
 
 
 139
 
 139
Return of capital to parent company
 
 (150) 
 
 (150)
Capital contributions from parent company
 
 53
 
 
 53
Other comprehensive income
 
 
 
 1
 1
Balance at December 31, 20191
 $38
 $4,449
 $(2,832) $(3) $1,652
The accompanying notes are an integral part of these financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and statements of capitalization of MississippiSouthern Power Company (the Company)and subsidiary companies (Southern Power) (a wholly ownedwholly-owned subsidiary of The Southern Company) as of December 31, 20162019 and 2015, and2018, the related consolidated statements of operations,income, comprehensive income, (loss), common stockholder'sstockholders' equity, and cash flows for each of the three years in the period ended December 31, 2016. 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Company'sSouthern Power's management. Our responsibility is to express an opinion on theseSouthern Power's financial statements based on our audits.

We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States).PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Companymisstatement, whether due to error or fraud. Southern Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. OurAs part of our audits, included considerationwe are required to obtain an understanding of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company'sSouthern Power's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence supportingregarding the amounts and disclosures in the financial statements, assessingstatements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statement presentation.statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Power's auditor since 2002.

CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Wholesale revenues, non-affiliates$1,528
 $1,757
 $1,671
Wholesale revenues, affiliates398
 435
 392
Other revenues12
 13
 12
Total operating revenues1,938
 2,205
 2,075
Operating Expenses:     
Fuel577
 699
 621
Purchased power108
 176
 149
Other operations and maintenance359
 395
 386
Depreciation and amortization479
 493
 503
Taxes other than income taxes40
 46
 48
Asset impairment3
 156
 
Gain on dispositions, net(23) (2) 
Total operating expenses1,543
 1,963
 1,707
Operating Income395
 242
 368
Other Income and (Expense):     
Interest expense, net of amounts capitalized(169) (183) (191)
Other income (expense), net47
 23
 1
Total other income and (expense)(122) (160) (190)
Earnings Before Income Taxes273
 82
 178
Income taxes (benefit)(56) (164) (939)
Net Income329
 246
 1,117
Net income (loss) attributable to noncontrolling interests(10) 59
 46
Net Income Attributable to Southern Power$339
 $187
 $1,071
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$329
 $246
 $1,117
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(22), $(17), and $39, respectively(66) (51) 63
Reclassification adjustment for amounts included in net income,
net of tax of $14, $19, and $(46), respectively
41
 58
 (73)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(6), $2, and $-, respectively(17) 5
 
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $-, respectively

 2
 
Total other comprehensive income (loss)(42) 14
 (10)
Comprehensive income (loss) attributable to noncontrolling interests(10) 59
 46
Comprehensive Income Attributable to Southern Power$297
 $201
 $1,061
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$329
 $246
 $1,117
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total505
 524
 536
Deferred income taxes(74) (244) (263)
Utilization of federal investment tax credits734
 5
 
Amortization of investment tax credits(151) (58) (57)
Accrued income taxes, non-current
 (14) 14
Income taxes receivable, non-current25
 42
 (61)
Pension and postretirement funding(24) 
 
Asset impairment3
 156
 
Other, net(33) 7
 (13)
Changes in certain current assets and liabilities —     
-Receivables72
 (20) (60)
-Prepaid income taxes39
 25
 24
-Other current assets(8) (26) (28)
-Accrued taxes6
 7
 (55)
-Other current liabilities(38) (19) 1
Net cash provided from operating activities1,385
 631
 1,155
Investing Activities:     
Business acquisitions. net of cash acquired(50) (65) (1,016)
Property additions(489) (315) (268)
Change in construction payables7
 (6) (153)
Investment in unconsolidated subsidiaries(116) 
 
Proceeds from dispositions and asset sales572
 203
 
Payments pursuant to LTSAs and for equipment not yet received(104) (75) (203)
Other investing activities13
 31
 15
Net cash used for investing activities(167) (227) (1,625)
Financing Activities:     
Increase (decrease) in notes payable, net449
 (105) (104)
Proceeds —     
Short-term borrowings100
 200
 
Capital contributions from parent company64
 2
 
Senior notes
 
 525
Other long-term debt
 
 43
Redemptions —     
Senior notes(600) (350) (500)
Other long-term debt
 (420) (18)
Short-term borrowings(100) (100) 
Return of capital to parent company(755) (1,650) 
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Purchase of membership interests from noncontrolling interests
 
 (59)
Payment of common stock dividends(206) (312) (317)
Other financing activities(12) (26) (33)
Net cash used for financing activities(1,120) (363) (502)
Net Change in Cash, Cash Equivalents, and Restricted Cash98
 41
 (972)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year181
 140
 1,112
Cash, Cash Equivalents, and Restricted Cash at End of Year$279
 $181
 $140
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $15, $17, and $11 capitalized, respectively)$167
 $173
 $189
Income taxes (net of refunds and investment tax credits)(664) 79
 (487)
Noncash transactions — Accrued property additions at year-end57
 31
 32
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$279
 $181
Receivables —   
Customer accounts receivable107
 111
Affiliated30
 55
Other73
 116
Materials and supplies191
 220
Prepaid income taxes36
 25
Other current assets43
 37
Total current assets759
 745
Property, Plant, and Equipment:   
In service13,270
 13,271
Less: Accumulated provision for depreciation2,464
 2,171
Plant in service, net of depreciation10,806
 11,100
Construction work in progress515
 430
Total property, plant, and equipment11,321
 11,530
Other Property and Investments:   
Intangible assets, net of amortization of $69 and $61
at December 31, 2019 and December 31, 2018, respectively
322
 345
Equity investments in unconsolidated subsidiaries28
 
Total other property and investments350
 345
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization369
 
Prepaid LTSAs128
 98
Accumulated deferred income taxes551
 1,186
Income taxes receivable, non-current5
 30
Assets held for sale601
 576
Other deferred charges and assets216
 373
Total deferred charges and other assets1,870
 2,263
Total Assets$14,300
 $14,883
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$824
 $599
Notes payable549
 100
Accounts payable —   
Affiliated56
 92
Other85
 77
Accrued taxes26
 6
Accrued interest32
 36
Other current liabilities132
 121
Total current liabilities1,704
 1,031
Long-Term Debt:   
Senior notes —   
2.375% due 2020
 300
2.50% due 2021300
 300
1.00% due 2022674
 687
2.75% due 2023290
 290
Weighted average interest rate 4.12% at 12/31/19 due 2025-20462,337
 2,348
Other long-term debt —   
Variable rate (3.34% at 12/31/18) due 2020
 525
Unamortized debt premium (discount), net(8) (9)
Unamortized debt issuance expense(19) (23)
Total long-term debt3,574
 4,418
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes115
 105
Accumulated deferred ITCs1,731
 1,832
Operating lease obligations376
 
Other deferred credits and liabilities178
 213
Total deferred credits and other liabilities2,400
 2,150
Total Liabilities7,678
 7,599
Common Stockholder's Equity:   
Common stock, par value $0.01 per share —   
Authorized — 1,000,000 shares   
Outstanding — 1,000 shares
 
Paid-in capital909
 1,600
Retained earnings1,485
 1,352
Accumulated other comprehensive income (loss)(26) 16
Total common stockholder's equity2,368
 2,968
Noncontrolling Interests4,254
 4,316
Total Stockholders' Equity6,622
 7,284
Total Liabilities and Stockholders' Equity$14,300
 $14,883
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings
 Accumulated Other Comprehensive Income Total Common Stockholder's Equity 
Noncontrolling Interests(a)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $3,671
 $724
 $35
 $4,430
 $1,245
 $5,675
Net income attributable
   to Southern Power

 
 
 1,071
 
 1,071
 
 1,071
Capital contributions to
   parent company, net

 
 (2) 
 
 (2) 
 (2)
Other comprehensive income (loss)
 
 
 
 (10) (10) 
 (10)
Cash dividends on common
   stock

 
 
 (317) 
 (317) 
 (317)
Other comprehensive income
transfer from SCS
(b)

 
 
 
 (27) (27) 
 (27)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 79
 79
Distributions to noncontrolling
   interests

 
 
 
 
 
 (122) (122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 44
 44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 114
 114
Other
 
 (7) 
 
 (7) 
 (7)
Balance at December 31, 2017
 
 3,662
 1,478
 (2) 5,138
 1,360
 6,498
Net income attributable
   to Southern Power

 
 
 187
 
 187
 
 187
Return of capital to parent
   company

 
 (1,650) 
 
 (1,650) 
 (1,650)
Capital contributions from parent
   company

 
 2
 
 
 2
 
 2
Other comprehensive income
 
 
 
 14
 14
 
 14
Cash dividends on common
   stock

 
 
 (312) 
 (312) 
 (312)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 1,372
 1,372
Distributions to noncontrolling
   interests

 
 
 
 
 
 (164) (164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 59
 59
Sale of noncontrolling interests(c)

 
 (417) 
 
 (417) 1,690
 1,273
Other
 
 3
 (1) 4
 6
 (1) 5
Balance at December 31, 2018
 
 1,600
 1,352
 16
 2,968
 4,316
 7,284
Net income attributable
   to Southern Power

 
 
 339
 
 339
 
 339
Return of capital to parent
   company

 
 (755) 
 
 (755) 
 (755)
Capital contributions from parent
   company

 
 64
 
 
 64
 
 64
Other comprehensive income (loss)
 
 
 
 (42) (42) 
 (42)
Cash dividends on common
   stock

 
 
 (206) 
 (206) 
 (206)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 276
 276
Distributions to noncontrolling
   interests

 
 
 
 
 
 (327) (327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 (10) (10)
Other
 
 
 
 
 
 (1) (1)
Balance at December 31, 2019
 $
 $909
 $1,485
 $(26) $2,368
 $4,254
 $6,622
(a)Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Noncontrolling Interests" for additional information.
(b)In connection with Southern Power becoming a participant to the Southern Company qualified pension plan and other postretirement benefit plan, $27 million of other comprehensive income, net of tax of $9 million, was transferred from SCS.
(c)
See Note 15 under "Southern Power - Sales of Renewable Facility Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, suchthe financial statements (pages II-427 to II-475) present fairly, in all material respects, the financial position of Mississippi PowerSouthern Company Gas as of December 31, 20162019 and 2015,2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2016,2019, in conformity with accounting principles generally accepted in the United States of America.

As discussed in Note 3 toWe did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment which is accounted for by the Mississippi Public Service Commission rate recovery process associateduse of the equity method. The accompanying consolidated financial statements of Southern Company Gas include its equity investment in SNG of $1,137 million and $1,261 million as of December 31, 2019 and December 31, 2018, respectively, and its earnings from its equity method investment in SNG of $141 million, $131 million, and $88 million for the years ended December 31, 2019, 2018, and 2017, respectively. Those statements were audited by other auditors whose reports (which express unqualified opinions on SNG's financial statements and contain an emphasis of matter paragraph calling attention to SNG's significant transactions with related parties) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the reports of the other auditors.
Basis for Opinion
These financial statements are the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion on Southern Company Gas' financial statements based on our audits. We are a public accounting firm registered with the Kemper Integrated Coal Gasification Combined Cycle Project mayPublic Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company Gas in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Company Gas is not required to have, a material impactnor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the Company'seffectiveness of Southern Company Gas' internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the reports of the other auditors provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 201719, 2020

We have served as Southern Company Gas' auditor since 2016.


DEFINITIONSCONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

TermMeaning
2012 MPSC CPCN OrderA detailed order issued by the Mississippi PSC in April 2012 confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing acquisition, construction, and operation of the Kemper IGCC
AFUDCAllowance for funds used during construction
Alabama PowerAlabama Power Company
AROAsset retirement obligation
ASCAccounting Standards Codification
ASUAccounting Standards Update
Baseload ActState of Mississippi legislation designed to enhance the Mississippi PSC's authority to facilitate development and construction of baseload generation in the State of Mississippi
CCRCoal combustion residuals
Clean Air ActClean Air Act Amendments of 1990
CO2
Carbon dioxide
CPCNCertificate of public convenience and necessity
CWIPConstruction work in progress
DOEU.S. Department of Energy
ECMEnergy cost management clause
ECOEnvironmental compliance overview
EPAU.S. Environmental Protection Agency
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
GAAPU.S. generally accepted accounting principles
Georgia PowerGeorgia Power Company
Gulf PowerGulf Power Company
IGCCIntegrated coal gasification combined cycle
IRSInternal Revenue Service
ITCInvestment tax credit
Kemper IGCCIGCC facility under construction in Kemper County, Mississippi
KWHKilowatt-hour
LIBORLondon Interbank Offered Rate
Mirror CWIPA regulatory liability used by Mississippi Power to record customer refunds resulting from a 2015 Mississippi PSC order
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MPUSMississippi Public Utilities Staff
MRAMunicipal and Rural Associations
MWMegawatt
OCIOther comprehensive income
PEPPerformance evaluation plan
Plant Daniel Units 3 and 4Combined cycle Units 3 and 4 at Plant Daniel
power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PPAPower purchase agreement
PSCPublic Service Commission
  2019 2018 2017
  (in millions)
Operating Revenues:      
Natural gas revenues (includes revenue taxes of $117, $114, and $100
for the periods presented, respectively)
 $3,793
 $3,874
 $3,787
Alternative revenue programs (1) (20) 4
Other revenues 
 55
 129
Total operating revenues 3,792
 3,909
 3,920
Operating Expenses:      
Cost of natural gas 1,319
 1,539
 1,601
Cost of other sales 
 12
 29
Other operations and maintenance 888
 981
 945
Depreciation and amortization 487
 500
 501
Taxes other than income taxes 213
 211
 184
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Total operating expenses 3,022
 2,994
 3,260
Operating Income 770
 915
 660
Other Income and (Expense):      
Earnings from equity method investments 157
 148
 106
Interest expense, net of amounts capitalized (232) (228) (200)
Other income (expense), net 20
 1
 44
Total other income and (expense) (55) (79) (50)
Earnings Before Income Taxes 715
 836
 610
Income taxes 130
 464
 367
Net Income $585
 $372
 $243
The accompanying notes are an integral part of these consolidated financial statements.



DEFINITIONSCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(continued)Southern Company Gas and Subsidiary Companies 2019 Annual Report


TermMeaning
ROEReturn on equity
S&PS&P Global Ratings, a division of S&P Global Inc.
scrubberFlue gas desulfurization system
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
SMEPASouth Mississippi Electric Power Association (now known as Cooperative Energy)
Southern CompanyThe Southern Company
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiaries
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), Southern Electric Generating Company, Southern Nuclear, SCS, Southern LINC, PowerSecure, Inc. (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.
Southern PowerSouthern Power Company and its subsidiaries
SRRSystem Restoration Rider
traditional electric operating companiesAlabama Power, Georgia Power, Gulf Power, and Mississippi Power Company
  2019 2018 2017
  (in millions)
Net Income $585
 $372
 $243
Other comprehensive income (loss):      
Qualifying hedges:      
Changes in fair value, net of tax of $(2), $2, and $(3), respectively (5) 5
 (5)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $(1), and $-, respectively
 2
 (1) 1
Pension and other postretirement benefit plans:      
Benefit plan net gain (loss), net of tax of $(14), $-, and $-, respectively (16) 
 (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $3, and $-, respectively
 
 (2) 
Total other comprehensive income (loss) (19) 2
 (5)
Comprehensive Income $566
 $374
 $238
The accompanying notes are an integral part of these consolidated financial statements.



MANAGEMENT'S DISCUSSION AND ANALYSISCONSOLIDATED STATEMENTS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONSCASH FLOWS
Mississippi PowerSouthern Company 2016Gas and Subsidiary Companies 2019 Annual Report
OVERVIEW
Business Activities
  2019 2018 2017
  (in millions)
Operating Activities:      
Net income $585
 $372
 $243
Adjustments to reconcile net income to net cash
provided from operating activities —
      
Depreciation and amortization, total 487
 500
 501
Deferred income taxes 213
 (1) 236
Pension and postretirement funding (145) 
 
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Mark-to-market adjustments (56) (19) (24)
Other, net (55) (24) (51)
Changes in certain current assets and liabilities —      
-Receivables 467
 (218) (94)
-Natural gas for sale 44
 49
 36
-Prepaid income taxes 40
 (42) (39)
-Other current assets 31
 4
 (24)
-Accounts payable (520) 372
 (20)
-Accrued taxes (69) 10
 110
-Accrued compensation 1
 32
 15
-Other current liabilities (71) (22) (8)
Net cash provided from operating activities 1,067
 764
 881
Investing Activities:      
Property additions (1,408) (1,388) (1,514)
Cost of removal, net of salvage (82) (96) (66)
Change in construction payables, net 24
 (37) 72
Investments in unconsolidated subsidiaries (31) (110) (145)
Returned investment in unconsolidated subsidiaries 67
 20
 80
Proceeds from dispositions and asset sales 32
 2,609
 
Other investing activities 12
 
 5
Net cash provided from (used for) investing activities (1,386) 998
 (1,568)
Financing Activities:      
Increase (decrease) in notes payable, net 
 (868) 262
Proceeds —      
First mortgage bonds 300
 300
 400
Capital contributions from parent company 821
 24
 103
Senior notes 
 
 450
Redemptions and repurchases —      
Gas facility revenue bonds 
 (200) 
Medium-term notes 
 
 (22)
First mortgage bonds (50) 
 
Senior notes (300) (155) 
Return of capital to parent company 
 (400) 
Payment of common stock dividends (471) (468) (443)
Other financing activities (2) (3) (9)
Net cash provided from (used for) financing activities 298
 (1,770) 741
Net Change in Cash, Cash Equivalents, and Restricted Cash (21) (8) 54
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year 70
 78
 24
Cash, Cash Equivalents, and Restricted Cash at End of Year $49
 $70
 $78
Supplemental Cash Flow Information:      
Cash paid (received) during the period for —      
Interest (net of $6, $7, and $11 capitalized, respectively) $251
 $249
 $223
Income taxes (net of refunds) (41) 524
 72
Noncash transactions — Accrued property additions at year-end 122
 97
 135
Mississippi Power Company (the Company) operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located within the StateThe accompanying notes are an integral part of Mississippi and to wholesale customers in the Southeast.these consolidated financial statements.
Many factors affect the opportunities, challenges, and risks of the Company's business of providing electric service. These factors include the Company's ability to maintain and grow energy sales and to operate in a constructive regulatory environment that provides timely recovery of prudently-incurred costs. These costs include those related to the completion and operation of the Kemper IGCC, projected long-term demand growth, reliability, fuel, and stringent environmental standards, as well as ongoing capital expenditures required for maintenance and restoration following major storms. Appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Company for the foreseeable future.
The Company continues to progress toward completing the construction and start-up of the Kemper IGCC, which was approved by the Mississippi PSC in the 2010 CPCN proceedings, subject to a construction cost cap of $2.88 billion, net of $245 million of grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2 (Initial DOE Grants) and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, AFUDC, and certain general exceptions, including change of law, force majeure, and beneficial capital (which exists when the Company demonstrates that the purpose and effect of the construction cost increase is to produce efficiencies that will result in a neutral or favorable effect on customers relative to the original proposal for the CPCN) (Cost Cap Exceptions). The current cost estimate for the Kemper IGCC in total is approximately $6.99 billion, which includes approximately $5.64 billion of costs subject to the construction cost cap and is net of the $137 million in additional grants from the DOE received on April 8, 2016 (Additional DOE Grants), which are expected to be used to reduce future rate impacts to customers. The Company does not intend to seek any rate recovery for any related costs that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The Company recorded pre-tax charges to income for revisions to the cost estimate subject to the construction cost cap totaling $348 million ($215 million after tax), $365 million ($226 million after tax), and $868 million ($536 million after tax) in 2016, 2015, and 2014, respectively. Since 2012, in the aggregate, the Company has incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016. The current cost estimate includes costs through March 15, 2017.
In addition to the current construction cost estimate, the Company is identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap. Any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in the Company's statements of income and these changes could be material.
The expected completion date of the Kemper IGCC at the time of the Mississippi PSC's approval in 2010 was May 2014. The combined cycle and the associated common facilities portion of the Kemper IGCC were placed in service in August 2014. The remainder of the plant, including the gasifiers and the gas clean-up facilities, represents first-of-a-kind technology. The initial production of syngas began on July 14, 2016 for gasifier "B" and on September 13, 2016 for gasifier "A." The Company achieved integrated operation of both gasifiers on January 29, 2017, including the production of electricity from syngas in both combustion turbines. The Company subsequently completed a brief outage to repair and make modifications to further improve the plant's ability to achieve sustained operations sufficient to support placing the plant in service for customers. Efforts to reach sustained operation of both gasifiers and production of electricity from syngas in both combustion turbines are in process. The plant has produced and captured CO2, and has produced sulfuric acid and ammonia, all of acceptable quality under the related off-take agreements. On February 20, 2017, the Company determined gasifier "B," which has been producing syngas over 60% of the time since early November 2016, requires an outage to remove ash deposits from its ash removal system. Gasifier "A" and combustion turbine "A" are expected to remain in operation, producing electricity from syngas, as well as producing chemical by-products. As a result, the Company currently expects the remainder of the Kemper IGCC, including both gasifiers, will be placed in service by mid-March 2017.
Upon placing the remainder of the plant in service, the Company will be primarily focused on completing the regulatory cost recovery process. In December 2015, the Mississippi PSC issued an order (In-Service Asset Rate Order), based on a stipulation

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi PowerCONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company 2016Gas and Subsidiary Companies 2019 Annual Report


(2015 Stipulation) between the Company and the MPUS, authorizing rates that provide for the recovery of approximately $126 million annually related to Kemper IGCC assets previously placed in service.
Assets 2019 2018
  (in millions)
Current Assets:    
Cash and cash equivalents $46
 $64
Receivables —    
Energy marketing receivable 428
 801
Customer accounts receivable 323
 370
Unbilled revenues 183
 213
Affiliated 5
 11
Other accounts and notes receivable 114
 142
Accumulated provision for uncollectible accounts (18) (30)
Natural gas for sale 479
 524
Prepaid expenses 65
 118
Assets from risk management activities, net of collateral 177
 219
Other regulatory assets 92
 73
Assets held for sale 171
 
Other current assets 41
 50
Total current assets 2,106
 2,555
Property, Plant, and Equipment:    
In service 16,344
 15,177
Less: Accumulated depreciation 4,650
 4,400
Plant in service, net of depreciation 11,694
 10,777
Construction work in progress 613
 580
Total property, plant, and equipment 12,307
 11,357
Other Property and Investments:    
Goodwill 5,015
 5,015
Equity investments in unconsolidated subsidiaries 1,251
 1,538
Other intangible assets, net of amortization of $176 and $145
at December 31, 2019 and December 31, 2018, respectively
 70
 101
Miscellaneous property and investments 20
 20
Total other property and investments 6,356
 6,674
Deferred Charges and Other Assets:    
Operating lease right-of-use assets, net of amortization 93
 
Other regulatory assets, deferred 618
 669
Other deferred charges and assets 207
 193
Total deferred charges and other assets 918
 862
Total Assets $21,687
 $21,448
On August 17, 2016, the Mississippi PSC established a discovery docket to manage all filings related to Kemper IGCC prudence issues. On October 3, 2016 and November 17, 2016, the Company made filings in this docket including a review and explanation of differences between the Kemper IGCC project estimate set forth in the 2010 CPCN proceedings and the most recent Kemper IGCC project estimate, as well as comparisons of current cost estimates and current expected plant operational parameters to the estimates presented in the 2010 CPCN proceedings for the first five years after the Kemper IGCC is placed in service. Compared to amounts presented in the 2010 CPCN proceedings, operations and maintenance expenses have increasedThe accompanying notes are an average of $105 million annually and maintenance capital has increased an average of $44 million annually for the first full five years of operations for the Kemper IGCC. Additionally, while the current estimated operational availability estimates reflect ultimate results similar to those presented in the 2010 CPCN proceedings, the ramp up period for the current estimates reflects a lower starting point and a slower escalation rate.
In the fourth quarter 2016, as aintegral part of the Integrated Resource Plan process, the Southern Company system completed its regular annual updated fuel forecast, the 2017 Annual Fuel Forecast. This updated fuel forecast reflected significantly lower long-term estimated costs for natural gas than were previously projected. As a result of the updated long-term natural gas forecast, as well as the revised operating expense projections reflected in the discovery docket filings, on February 21, 2017, the Company filed an updated project economic viability analysis of the Kemper IGCC as required under the 2012 MPSC CPCN Order. The project economic viability analysis measures the life cycle economics of the Kemper IGCC compared to feasible alternatives, natural gas combined cycle generating units, under a variety of scenarios and considering fuel, operating and capital costs, and operating characteristics, as well as federal and state taxes and incentives. The reduction in the projected long-term natural gas prices in the 2017 Annual Fuel Forecast and, to a lesser extent, the increase in the estimated Kemper IGCC operating costs, negatively impact the updated project economic viability analysis.
After the remainder of the plant is placed in service, AFUDC equity of approximately $11 million per month will no longer be recorded in income, and the Company expects to incur approximately $25 million per month in depreciation, taxes, operations and maintenance expenses, interest expense, and regulatory costs in excess of current rates. The Company expects to file a request for authority from the Mississippi PSC and the FERC to defer all Kemper IGCC costs incurred after the in-service date that cannot be capitalized, are not included in current rates, and are not required to be charged against earnings as a result of the $2.88 billion cost cap until such time as the Mississippi PSC completes its review and includes the resulting allowable costs in rates. In the event that the Mississippi PSC does not grant the Company's request for an accounting order, these monthly expenses will be charged to income as incurred and will not be recoverable through rates. The ultimate outcome of this matter cannot now be determined but could have a material impact on the Company's result of operations,consolidated financial condition, and liquidity.
The Company is required to file a rate case to address Kemper IGCC cost recovery by June 3, 2017 (2017 Rate Case). Costs incurred through December 31, 2016 totaled $6.73 billion, net of the Initial and Additional DOE Grants. Of this total, $2.76 billion of costs has been recognized through income as a result of the $2.88 billion cost cap, $0.83 billion is included in retail and wholesale rates for the assets in service, and the remainder will be the subject of the 2017 Rate Case to be filed with the Mississippi PSC and expected subsequent wholesale MRA rate filing with the FERC. The Company continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. The Company also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further herein, these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs, net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, the Company is developing both a traditional rate case requesting full cost recovery of the $3.31 billion (net of $137 million in Additional DOE Grants) not currently in rates and a rate mitigation plan that together represent the Company's probable filing strategy. The Company also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both the Company and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on the Company's financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to thestatements.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi PowerCONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company 2016Gas and Subsidiary Companies 2019 Annual Report


parties cannot be reached, the Company intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
Liabilities and Stockholder's Equity 2019 2018
  (in millions)
Current Liabilities:    
Securities due within one year $
 $357
Notes payable 650
 650
Energy marketing trade payables 442
 856
Accounts payable —    
Affiliated 41
 45
Other 315
 402
Customer deposits 96
 133
Accrued taxes —    
Accrued income taxes 
 66
Other accrued taxes 71
 75
Accrued interest 52
 55
Accrued compensation 100
 100
Liabilities from risk management activities, net of collateral 21
 76
Other regulatory liabilities 94
 79
Other current liabilities 128
 130
Total current liabilities 2,010
 3,024
Long-term Debt (See accompanying statements)
 5,845
 5,583
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 1,219
 1,016
Deferred credits related to income taxes 874
 940
Employee benefit obligations 265
 357
Operating lease obligations 78
 
Other cost of removal obligations 1,606
 1,585
Accrued environmental remediation 233
 268
Other deferred credits and liabilities 51
 105
Total deferred credits and other liabilities 4,326
 4,271
Total Liabilities 12,181
 12,878
Common Stockholder's Equity (See accompanying statements)
 9,506
 8,570
Total Liabilities and Stockholder's Equity $21,687
 $21,448
Commitments and Contingent Matters (See notes)
 

 

The Company has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognizedaccompanying notes are an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017. Given the variety of potential scenarios and the uncertainty of the outcome of future regulatory proceedings with the Mississippi PSC (and any subsequent related legal challenges), the ultimate outcomeintegral part of these matters cannot now be determined but could result in further charges that could have a material impact on the Company's resultsconsolidated financial statements.


CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$300
  
20214.01%330
330
  
20228.63%46
46
  
20232.45%350
350
  
2025-20474.68%3,134
3,134
  
Total long-term notes payable 3,860
4,160
  
Other long-term debt —     
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026-20593.94%1,525
1,225
  
Total other long-term debt 1,575
1,325
  
Unamortized fair value adjustment of long-term debt 430
474
  
Unamortized debt discount (20)(19)  
Total long-term debt 5,845
5,940
  
Less amount due within one year 
357
  
Long-term debt excluding amount due within one year 5,845
5,583
38.1%39.4%
Common Stockholder's Equity:     
Common stock — par value $0.01 per share     
Authorized — 100 million shares     
Outstanding — 100 shares     
Paid-in capital 9,697
8,856
  
Accumulated deficit (198)(312)  
Accumulated other comprehensive income 7
26
  
Total common stockholder's equity 9,506
8,570
61.9
60.6
Total Capitalization $15,351
$14,153
100.0%100.0%

The accompanying notes are an integral part of these financial condition,statements.

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
Southern Company Gas and liquidity.Subsidiary Companies 2019 Annual Report
 
Number of Common Shares
Issued
 Common Stock Paid-In Capital Retained Earnings (Accumulated Deficit) 
Accumulated
Other
Comprehensive Income (Loss)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $9,095
 $(12) $26
 $9,109
Net income
 
 
 243
 
 243
Capital contributions from parent company
 
 117
 
 
 117
Other comprehensive income (loss)
 
 
 
 (5) (5)
Cash dividends on common stock
 
 
 (443) 
 (443)
Other
 
 2
 
 (1) 1
Balance at December 31, 2017
 
 9,214
 (212) 20
 9,022
Net income
 
 
 372
 
 372
Return of capital to parent company
 
 (400) 
 
 (400)
Capital contributions from parent company
 
 42
 
 
 42
Other comprehensive income
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (468) 
 (468)
Other
 
 
 (4) 4
 
Balance at December 31, 2018
 
 8,856
 (312) 26
 8,570
Net income
 
 
 585
 
 585
Capital contributions from parent company
 
 841
 
 
 841
Other comprehensive income (loss)
 
 
 
 (19) (19)
Cash dividends on common stock
 
 
 (471) 
 (471)
Balance at December 31, 2019
 $
 $9,697
 $(198) $7
 $9,506

The accompanying notes are an integral part of these consolidated financial statements. 

COMBINED NOTES TO FINANCIAL STATEMENTS
Southern Company and Subsidiary Companies 2019 Annual Report




Notes to the Company are defendants in various lawsuits that allege improper disclosure about the Kemper IGCC. While the Company believes that these lawsuits are without merit, an adverse outcome could have a material impact on the Company's results of operations, financial condition, and liquidity. In addition, the SEC is conducting a formal investigation ofFinancial Statements
for
The Southern Company and the Company concerning the estimated costs and expected in-service date of the Kemper IGCC. Southern Company and the Company believe the investigation is focused primarily on periods subsequent to 2010 and on accounting matters, disclosure controls and procedures, and internal controls over financial reporting associated with the Kemper IGCC. See FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle" and "Other Matters" herein for additional information.Subsidiary Companies
As of December 31, 2016, the Company's current liabilities exceeded current assets by approximately $371 million primarily due to $551 million in promissory notes to Southern Company which mature in December 2017, $35 million in senior notes which mature in November 2017, and $63 million in short-term debt. The Company expects the funds needed to satisfy the promissory notes to Southern Company will exceed amounts available from operating cash flows, lines of credit, and other external sources. Accordingly, the Company intends to satisfy these obligations through loans and/or equity contributions from Southern Company. Specifically, the Company has been informed by Southern Company that, in the event sufficient funds are not available from external sources, Southern Company intends to (i) extend the maturity of the $551 million in promissory notes and (ii) provide Mississippi Power with loans and/or equity contributions sufficient to fund the remaining indebtedness scheduled to mature and other cash needs over the next 12 months. Therefore, the Company's financial statement presentation contemplates continuation of the Company as a going concern as a result of Southern Company's anticipated ongoing financial support of the Company, consistent with the requirements of ASU 2014-15 (as defined herein). See FINANCIAL CONDITION AND LIQUIDITY – "Sources of Capital" herein and Notes 1 and 6 to the financial statements for additional information.
The Company continues to focus on several key performance indicators, including the construction, start-up, and rate recovery of the Kemper IGCC.
In recognition that the Company's long-term financial success is dependent upon how well it satisfies its customers' needs, the Company's retail base rate mechanism, PEP, includes performance indicators that directly tie customer service indicators to the Company's allowed return. PEP measures the Company's performance on a 10-point scale as a weighted average of results in three areas: average customer price, as compared to prices of other regional utilities (weighted at 40%); service reliability, measured in percentage of time customers had electric service (40%); and customer satisfaction, measured in a survey of residential customers (20%). See Note 3 to the financial statements under "Retail Regulatory Matters – Performance Evaluation Plan" for more information on PEP.
In addition to the PEP performance indicators, the Company focuses on other performance measures, including broader measures of customer satisfaction, plant availability, system reliability, and net income after dividends on preferred stock.
The Company's financial success is directly tied to customer satisfaction. Key elements of ensuring customer satisfaction include outstanding service, high reliability, and competitive prices. Management uses customer satisfaction surveys to evaluate the Company's results and generally targets the top quartile in measuring performance.
See RESULTS OF OPERATIONS herein for information on the Company's financial performance.
Earnings
The Company's net loss after dividends on preferred stock was $50 million in 2016 compared to $8 million in 2015. The change in 2016 was primarily the result of higher pre-tax charges of $428 million ($264 million after tax) in 2016 compared to pre-tax charges of $365 million ($226 million after tax) in 2015 for estimated losses on the Kemper IGCC. The decrease in net income was partially offset by an increase in retail revenues due to the implementation of rates in September 2015 for certain Kemper IGCC in-service assets, partially offset by a decrease in wholesale revenues. The increase in revenues was partially offset by an

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
MississippiAlabama Power Company 2016 Annual Report

increase in interest expense in 2016 compared to 2015 due to the termination of an asset purchase agreement between the Company and SMEPA in May 2015 and an increase in operations and maintenance expenses.
The Company's net loss after dividends on preferred stock was $8 million in 2015 compared to $329 million in 2014. The change in 2015 was primarily the result of lower pre-tax charges of $365 million ($226 million after tax) in 2015 compared to pre-tax charges of $868 million ($536 million after tax) in 2014 for revisions of estimated costs expected to be incurred on the Company's construction of the Kemper IGCC above the $2.88 billion cost cap established by the Mississippi PSC, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The reduction in net loss was also related to an increase in retail base revenues, due to the implementation of rates for certain Kemper IGCC assets placed in service that became effective with the first billing cycle in September (on August 19), and a decrease in interest expense primarily due to the termination of an asset purchase agreement between the Company and SMEPA in May 2015, partially offset by increases in income taxes due to a reduced net loss.
See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.
RESULTS OF OPERATIONS
A condensed statement of operations follows:
 Amount 
Increase (Decrease)
from Prior Year
 2016 2016 2015
 (in millions)
Operating revenues$1,163
 $25
 $(105)
Fuel343
 (100) (131)
Purchased power34
 22
 (31)
Other operations and maintenance312
 38
 3
Depreciation and amortization132
 9
 26
Taxes other than income taxes109
 15
 15
Estimated loss on Kemper IGCC428
 63
 (503)
Total operating expenses1,358
 47
 (621)
Operating income(195) (22) 516
Allowance for equity funds used during construction124
 14
 (26)
Interest expense, net of amounts capitalized74
 67
 (38)
Other income (expense), net(7) 1
 6
Income taxes (benefit)(104) (32) 213
Net income (loss)(48) (42) 321
Dividends on preferred stock2
 
 
Net loss after dividends on preferred stock$(50) $(42) $321

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
MississippiGeorgia Power Company 2016 Annual Report

Operating Revenues
Operating revenues for 2016 were $1.2 billion, reflecting a $25 million increase from 2015. Details of operating revenues were as follows:
 Amount
 2016 2015
 (in millions)
Retail — prior year$776
 $795
Estimated change resulting from —   
Rates and pricing96
 61
Sales decline(4) (3)
Weather8
 (1)
Fuel and other cost recovery(17) (76)
Retail — current year859
 776
Wholesale revenues —   
Non-affiliates261
 270
Affiliates26
 76
Total wholesale revenues287
 346
Other operating revenues17
 16
Total operating revenues$1,163
 $1,138
Percent change2.2% (8.4)%
Total retail revenues for 2016 increased $83 million, or 10.7%, compared to 2015 primarily due to changes in rates and pricing of $96 million partially offset by a net decrease in fuel and other cost recovery of $17 million. Total retail revenues for 2015 decreased $19 million, or 2.4%, compared to 2014 primarily due to a lower fuel cost recovery. This decrease was partially offset by changes in rates and pricing of $61 million.
Revenues associated with changes in rates and pricing increased $96 million in 2016 and $61 million in 2015, primarily due to the implementation of rates for certain Kemper IGCC in-service assets effective in September 2015 and an annual ECO rate increase of $22 million collected from September through December 2016.
See Note 3 to the financial statements under "Retail Regulatory Matters – Environmental Compliance Overview" and "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs" for additional information. See "Energy Sales" below for a discussion of changes in the volume of energy sold, including changes related to sales and weather.
Electric rates for the Company include provisions to adjust billings for fluctuations in fuel costs, including the energy component of purchased power costs. Under these provisions, fuel revenues generally equal fuel expenses, including the energy component of purchased power costs, and do not affect net income. Recoverable fuel costs include fuel and purchased power expenses reduced by the fuel and emissions portion of wholesale revenues from energy sold to customers outside the Company's service territory. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein for additional information.
Wholesale revenues from power sales to non-affiliated utilities, including FERC-regulated MRA sales as well as market-based sales, were as follows:
 2016 2015 2014
 (in millions)
Capacity and other$157
 $158
 $160
Energy104
 112
 163
Total non-affiliated$261
 $270
 $323
Wholesale revenues from sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of the Company's and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation. Increases and

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

decreases in energy revenues that are driven by fuel prices are accompanied by an increase or decrease in fuel costs and do not have a significant impact on net income. In addition, the Company provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 19.8% of the Company's total operating revenues in 2016 and are largely subject to rolling 10-year cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Wholesale revenues from sales to non-affiliates decreased $9 million, or 3.3%, in 2016 compared to 2015 primarily as a result of an $8 million decrease in energy revenues, of which $10 million was associated with lower fuel prices, offset by an increase in KWH sales of $2 million. Wholesale revenues from sales to non-affiliates decreased $53 million, or 16.4%, in 2015 compared to 2014 primarily as a result of a $51 million decrease in energy revenues, of which $13 million was associated with a decrease in KWH sales and $38 million was associated with lower fuel prices.
Short-term opportunity energy sales are also included in sales for resale to non-affiliates. These opportunity sales are made at market-based rates that generally provide a margin above the Company's variable cost to produce the energy.
Wholesale revenues from sales to affiliates will vary depending on demand and the availability and cost of generating resources at each company. These affiliate sales are made in accordance with the Intercompany Interchange Contract (IIC), as approved by the FERC. These transactions do not have a significant impact on earnings since this energy is generally sold at marginal cost.
Wholesale revenues from sales to affiliates decreased $50 million, or 65.8%, in 2016 compared to 2015 primarily due to a $50 million decrease in energy revenues of which $4 million was associated with lower fuel prices and $46 million was associated with a decrease in KWH sales as a result of lower cost generation available in the Southern Company system. Wholesale revenues from sales to affiliates decreased $31 million, or 29.0%, in 2015 compared to 2014 primarily due to a $31 million decrease in energy revenues of which $28 million was associated with lower fuel prices and $3 million was associated with a decrease in KWH sales.
Energy Sales
Changes in revenues are influenced heavily by the change in the volume of energy sold from year to year. KWH sales for 2016 and the percent change from the prior year were as follows:
 
Total
KWHs
 
Total KWH
Percent Change
 Weather-Adjusted Percent Change
 2016 2016 2015 
2016(*)
 
2015(*)
 (in millions)        
Residential2,051
 1.3 % (4.8)% (2.4)% (0.4)%
Commercial2,842
 1.3
 (1.9) (2.2) (0.4)
Industrial4,906
 (1.0) 0.3
 (1.6) 0.8
Other39
 (1.3) (2.1) (1.3) (2.1)
Total retail9,838
 0.1
 (1.4) (1.9)% 0.2 %
Wholesale         
Non-affiliated3,920
 1.7
 (8.1)    
Affiliated1,108
 (60.5) (3.2)    
Total wholesale5,028
 (24.5) (6.1)    
Total energy sales14,866
 (9.8)% (3.4)%    
(*)In the first quarter 2015, the Company updated the methodology to estimate the unbilled revenue allocation among customer classes. This change did not have a material impact on net income. The KWH sales variances in the above table reflect an adjustment to the estimated allocation of the Company's unbilled 2014 and first quarter 2015 KWH sales among customer classes that is consistent with the actual allocation in 2015 and 2016, respectively. Without this adjustment, 2016 weather-adjusted residential sales decreased 1.0%, commercial sales decreased 0.6%, and industrial KWH sales decreased 1.0% as compared to the corresponding period in 2015. Without this adjustment, 2015 weather-adjusted residential sales decreased 1.8%, commercial sales decreased 2.1%, and industrial KWH sales increased 0.3% as compared to the corresponding period in 2014.
Changes in retail energy sales are generally the result of changes in electricity usage by customers, changes in weather, and changes in the number of customers. Retail energy sales increased 0.1% in 2016 as compared to the prior year. This increase was primarily the result of warmer weather in the third quarter 2016 as compared to the corresponding period in 2015. Weather-adjusted residential and commercial KWH sales decreased primarily due to decreased customer usage partially offset by customer

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

growth. The decrease in industrial KWH energy sales was primarily due to planned and unplanned outages by large industrial customers.
Retail energy sales decreased 1.4% in 2015 as compared to the prior year. This decrease was primarily the result of milder weather in the first and fourth quarters of 2015 as compared to the corresponding periods in 2014. Weather-adjusted residential and commercial KWH sales decreased primarily due to decreased customer usage partially offset by customer growth. Household income, one of the primary drivers of residential customer usage, had modest growth in 2015. The increase in industrial KWH energy sales was primarily due to expanded operation by many industrial customers.
Wholesale energy sales to non-affiliates decreased in 2016 compared to 2015 primarily due to lower fuel prices which was partially offset by an increased opportunity sales to the external market based on higher demand. Wholesale energy sales to non-affiliates decreased in 2015 compared to 2014 primarily due to decreased opportunity sales to the external market based on lower demand which was offset by lower fuel prices.
Wholesale energy sales to non-affiliates will vary depending on fuel prices, the market prices of wholesale energy compared to the cost of the Company and the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Wholesale energy sales to affiliates decreased in 2016 compared to 2015 primarily due to lower fuel cost and reduced sales to affiliate companies. Wholesale energy sales to affiliates decreased in 2015 compared to 2014 primarily due to lower fuel cost and reduced sales to affiliate companies.
Fuel and Purchased Power Expenses
Fuel costs constitute one of the single largest expenses for the Company. The mix of fuel sources for generation of electricity is determined primarily by demand, the unit cost of fuel consumed, and the availability of generating units. Additionally, the Company purchases a portion of its electricity needs from the wholesale market.
Details of the Company's generation and purchased power were as follows:
 2016 2015 2014
Total generation (in millions of KWHs)
14,514
 17,014
 16,881
Total purchased power (in millions of KWHs)
1,574
 539
 886
Sources of generation (percent) –
     
Coal9
 17
 42
Gas91
 83
 58
Cost of fuel, generated (in cents per net KWH) –
     
Coal3.91
 3.71
 3.96
Gas2.41
 2.58
 3.37
Average cost of fuel, generated (in cents per net KWH)
2.55
 2.78
 3.64
Average cost of purchased power (in cents per net KWH)
3.07
 2.17
 4.85
Fuel and purchased power expenses were $377 million in 2016, a decrease of $78 million, or 17.1%, as compared to the prior year. The decrease was primarily due to a $20 million decrease in the cost of natural gas and a decrease of $82 million due to a decrease in the volume of KWH generation, partially offset by a $12 million increase in KWHs purchased and a $12 million increase in the cost of coal. Fuel and purchased power expenses were $455 million in 2015, a decrease of $162 million, or 26.3%, as compared to the prior year. The decrease was primarily due to a $125 million decrease in the cost of fuel and purchased power and a decrease of $183 million in the volume of KWHs generated by coal and purchased, partially offset by a $146 million increase in the volume of KWHs generated by gas.
Fuel and purchased power energy transactions do not have a significant impact on earnings, since energy expenses are generally offset by energy revenues through the Company's fuel cost recovery clauses. See FUTURE EARNINGS POTENTIAL – "Retail Regulatory Matters – Fuel Cost Recovery" herein and Note 1 to the financial statements under "Fuel Costs" for additional information.
Fuel
Fuel expense decreased $100 million, or 22.6%, in 2016 compared to 2015 due to an 8.2% decrease in the average cost of fuel per KWH generated and a 15.5% decrease in the volume of KWHs generated. Fuel expense decreased $131 million, or 22.8%, in

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

2015 compared to 2014. The decrease was the result of a 23.6% decrease in the average cost of fuel per KWH generated, partially offset by a 0.9% increase in the volume of KWHs generated.
Purchased Power - Non-Affiliates
Purchased power expense from non-affiliates was flat in 2016 compared to 2015. Purchased power expense from non-affiliates decreased $13 million, or 72.2%, in 2015 compared to 2014. The decrease was primarily the result of a 72.4% decrease in the average cost per KWH purchased.
Energy purchases from non-affiliates will vary depending on the market prices of wholesale energy compared to the cost of the Southern Company system's generation, demand for energy within the Southern Company system's electric service territory, and the availability of the Southern Company system's generation.
Purchased Power - Affiliates
Purchased power expense from affiliates increased $22 million, or 314.3%, in 2016 compared to 2015. The increase in 2016 was primarily the result of a 338.4% increase in the volume of KWHs purchased due to the availability of lower cost energy as compared to the cost of self-generation and a slight increase in the average cost per KWH purchased compared to 2015. Purchased power expense from affiliates decreased $18 million, or 72.0%, in 2015 compared to 2014. The decrease in 2015 was primarily the result of a 58.3% decrease in the volume of KWHs purchased and a 36.9% decrease in the average cost per KWH purchased compared to 2014.
Energy purchases from affiliates will vary depending on demand for energy and the availability and cost of generating resources at each company within the Southern Company system. These purchases are made in accordance with the IIC or other contractual agreements, as approved by the FERC.
Other Operations and Maintenance Expenses
Other operations and maintenance expenses increased $38 million, or 13.9%, in 2016 compared to the prior year. The increase was primarily due to a $28 million increase in operations and maintenance expenses related to the combined cycle and the associated common facilities portion of the Kemper IGCC, $10 million in amortization of prior operations and maintenance expense deferrals that the Company began recognizing in connection with rates associated with the Kemper IGCC in-service assets, and a $7 million increase in transmission and distribution expenses primarily related to overhead line maintenance and vegetation management, partially offset by a $9 million decrease in generation outage costs.
Other operations and maintenance expenses increased $3 million, or 1.1%, in 2015 compared to the prior year. The increase was primarily related to a $7 million increase in employee compensation and benefits, including pension costs, and a $6 million increase in generation maintenance expenses related to the combined cycle and the associated common facilities portion of the Kemper IGCC. See Note 2 to the financial statements for additional information on pension costs. Beginning in the third quarter 2015, in connection with the implementation of rates associated with the Kemper IGCC, the Company began expensing certain ongoing project costs associated with Kemper IGCC assets placed in service that previously were deferred as regulatory assets. See FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs – 2015 Rate Case" and " – Regulatory Assets and Liabilities" herein for additional information. These increases in 2015 were partially offset by decreases of $4 million in transmission and distribution expenses primarily related to overhead line maintenance and vegetation management, $3 million in generation maintenance expenses primarily due to lower outage costs, and $2 million in overtime labor.
Depreciation and Amortization
Depreciation and amortization increased $9 million, or 7.3%, in 2016 compared to 2015 primarily due to $32 million of additional regulatory asset amortization related to the In-Service Asset Rate Order, ECO plan, and Mercury and Air Toxics Standards (MATS) rule compliance, $13 million associated with Kemper IGCC deferrals primarily related to depreciation deferrals in 2015, and $9 million of depreciation for additional plant in service assets primarily associated with the Plant Daniel scrubbers. These increases were partially offset by $23 million of amortization of regulatory deferrals related to the In-Service Asset Rate Order and a $22 million deferral associated with the implementation of revised ECO plan rates with the first billing cycle for September 2016.
Depreciation and amortization increased $26 million, or 26.8%, in 2015 compared to 2014 primarily due to an $18 million increase in depreciation related to an increase in assets in service and an increase in the depreciation rates, a $16 million increase due to amortization of regulatory assets associated with the Kemper IGCC, and a $2 million increase resulting from the estimated 2015 cost of capital as agreed in the In-Service Asset Rate Order. These increases were partially offset by decreases of $5 million

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

in ECO plan amortization, $3 million in Kemper IGCC combined cycle cost deferrals, and $2 million in deferrals associated with the purchase of Plant Daniel Units 3 and 4. See FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs – Regulatory Assets and Liabilities" herein for additional information.
See Note 1 to the financial statements under "Depreciation and Amortization" and Note 3 to the financial statements under "FERC Matters," "Retail Regulatory Matters – Environmental Compliance Overview Plan," and "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs" for additional information.
Taxes Other Than Income Taxes
Taxes other than income taxes increased $15 million, or 16.0%, in 2016 compared to 2015 primarily due to increases in ad valorem taxes of $10 million, related to an increase in the assessed value of property, as well as increases in franchise taxes of $5 million, related to increased operating revenue. Taxes other than income taxes increased $15 million, or 19.0%, in 2015 compared to 2014 primarily as a result of a $12 million increase in ad valorem taxes and a $4 million increase in franchise taxes, partially offset by a $1 million decrease in payroll taxes.
The retail portion of ad valorem taxes is recoverable under the Company's ad valorem tax cost recovery clause and, therefore, does not affect net income.
Estimated Loss on Kemper IGCC
Estimated probable losses on the Kemper IGCC of $428 million, $365 million, and $868 million were recorded in 2016, 2015, and 2014, respectively, to reflect revisions of estimated costs expected to be incurred on the construction of the Kemper IGCC in excess of the $2.88 billion cost cap established by the Mississippi PSC, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The 2016 loss also reflects $80 million associated with the estimated minimum probable amount of costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information.
Allowance for Equity Funds Used During Construction
AFUDC equity increased $14 million, or 12.7%, in 2016 as compared to 2015. The increase in 2016 was primarily due to a higher AFUDC rate and an increase in Kemper IGCC CWIP subject to AFUDC, partially offset by placing the Plant Daniel scrubbers in service in November 2015. AFUDC equity decreased $26 million, or 19.1%, in 2015 as compared to 2014. The decrease in 2015 was primarily due to a reduction in the AFUDC rate driven by an increase in short-term borrowings and placing the combined cycle and the associated common facilities portion of the Kemper IGCC in service in August 2014. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Allowance for Funds Used During Construction" herein and Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.
Interest Expense, Net of Amounts Capitalized
Interest expense, net of amounts capitalized increased $67 million in 2016 compared to 2015. The increase was primarily due to an increase of $31 million of interest on deposits resulting from the 2015 reversal of interest associated with the termination of an asset purchase agreement between the Company and SMEPA in May 2015; a $20 million increase due to additional long-term debt and a $30 million decrease in amounts capitalized primarily resulting from $17 million of capitalized interest and the amortization of $13 million in interest deferrals in accordance with the In-Service Asset Rate Order. These net increases were partially offset by a decrease of $16 million in interest accrued on the Mirror CWIP liability prior to refund in 2015.
Interest expense, net of amounts capitalized decreased $38 million, or 84.4%, in 2015 compared to 2014. The decrease was primarily due to a $58 million decrease related to the termination of an asset purchase agreement between the Company and SMEPA in May 2015 which required the return of SMEPA's deposits at a lower rate of interest than accrued, a $5 million decrease associated with amended tax returns, and a $2 million decrease associated with the redemption of long-term debt in 2015. These decreases were partially offset by increases in interest expense of $10 million associated with additional issuances of debt in 2015, $9 million associated with unrecognized tax benefits, and $5 million related to the Mirror CWIP refund, partially offset by a $3 million decrease in AFUDC debt. See Note 5 to the financial statements for additional information.
See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle – Termination of Proposed Sale of Undivided Interest to SMEPA" for more information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Income Taxes (Benefit)
Income tax benefits increased $32 million, or 44.4%, in 2016 compared to 2015 primarily as a result of an increase in the estimated probable losses on the Kemper IGCC and an increase in AFUDC equity, which is non-taxable.
Income tax benefits decreased $213 million, or 74.7%, in 2015 compared to 2014 primarily resulting from the reduction in pre-tax losses related to the estimated probable losses on the Kemper IGCC.
Effects of Inflation
The Company is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on the Company's results of operations has not been substantial in recent years.
FUTURE EARNINGS POTENTIAL
General
The Company operates as a vertically integrated utility providing electric service to retail customers within its traditional service territory located in southeast Mississippi and to wholesale customers in the Southeast. Prices for electricity provided by the Company to retail customers are set by the Mississippi PSC under cost-based regulatory principles. Retail rates and earnings are reviewed and may be adjusted periodically within certain limitations. Prices for wholesale electricity sales, interconnecting transmission lines, and the exchange of electric power are regulated by the FERC. See "FERC Matters" herein, ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates – Utility Regulation" herein, and Note 3 to the financial statements for additional information about regulatory matters.
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of the Company's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Company's business of selling electricity. These factors include the Company's ability to recover its prudently-incurred costs, including those related to the remainder of the Kemper IGCC costs not included in current rates, in a timely manner during a time of increasing costs, its ability to prevail against legal challenges associated with the Kemper IGCC, and the completion and subsequent operation of the Kemper IGCC in accordance with any operational parameters that may be adopted by the Mississippi PSC. Future earnings will be driven primarily by customer growth. Earnings will also depend upon maintaining and growing sales, considering, among other things, the adoption and/or penetration rates of increasingly energy-efficient technologies and increasing volumes of electronic commerce transactions. Earnings are subject to a variety of other factors. These factors include weather, competition, developing new and maintaining existing energy contracts and associated load requirements with other utilities and other wholesale customers, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of electricity, the price elasticity of demand, and the rate of economic growth or decline in the Company's service territory. Demand for electricity is primarily driven by economic growth. The pace of economic growth and electricity demand may be affected by changes in regional and global economic conditions, which may impact future earnings. Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction. The ultimate impact of any tax reform proposals is dependent on the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on the Company's financial statements.
The Company provides service under long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 19.8% of the Company's total operating revenues in 2016 and are largely subject to rolling 10-year cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Environmental Matters
Compliance costs related to federal and state environmental statutes and regulations could affect earnings if such costs cannot continue to be fully recovered in rates on a timely basis or through long-term wholesale agreements. Environmental compliance spending over the next several years may differ materially from the amounts estimated. The timing, specific requirements, and estimated costs could change as environmental statutes and regulations are adopted or modified, as compliance plans are revised or updated, and as legal challenges to rules are completed. Further, higher costs that are recovered through regulated rates could contribute to reduced demand for electricity, which could negatively affect results of operations, cash flows, and financial condition. See Note 3 to the financial statements under "Environmental Matters" for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Environmental Statutes and Regulations
General
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Applicable statutes include the Clean Air Act; the Clean Water Act; the Comprehensive Environmental Response, Compensation, and Liability Act; the Resource Conservation and Recovery Act; the Toxic Substances Control Act; the Emergency Planning & Community Right-to-Know Act; the Endangered Species Act; the Migratory Bird Treaty Act; the Bald and Golden Eagle Protection Act; and related federal and state regulations. Compliance with these environmental requirements involves significant capital and operating costs, a major portion of which is expected to be recovered through existing ratemaking provisions. Through 2016, the Company had invested approximately $634 million in environmental capital retrofit projects to comply with these requirements, with annual totals of approximately $17 million, $94 million, and $118 million for 2016, 2015, and 2014, respectively. The Company expects that capital expenditures to comply with environmental statutes and regulations will total approximately $127 million from 2017 through 2021, with annual totals of approximately $11 million, $5 million, $24 million, $29 million, and $58 million for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated expenditures do not include any potential capital expenditures that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See "Global Climate Issues" herein for additional information. The Company also anticipates costs associated with ash pond closure and ground water monitoring under the Disposal of Coal Combustion Residuals from Electric Utilities final rule (CCR Rule), which are reflected in the Company's ARO liabilities. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein and Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
The Company's ultimate environmental compliance strategy, including potential unit retirement and replacement decisions, and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations, including the environmental regulations described below; the time periods over which compliance with regulations is required; individual state implementation of regulations, as applicable; the outcome of any legal challenges to the environmental rules; any additional rulemaking activities in response to legal challenges and court decisions; the cost, availability, and existing inventory of emissions allowances; the impact of future changes in generation and emissions-related technology; the Company's fuel mix; and environmental remediation requirements. Compliance costs may arise from existing unit retirements, installation of additional environmental controls, closure and monitoring of CCR facilities, and adding or changing fuel sources for certain existing units. The ultimate outcome of these matters cannot be determined at this time. See "Retail Regulatory Matters – Environmental Compliance Overview Plan" herein for additional information.
Compliance with any new federal or state legislation or regulations relating to air, water, and land resources or other environmental and health concerns could significantly affect the Company. Although new or revised environmental legislation or regulations could affect many areas of the Company's operations, the full impact of any such changes cannot be determined at this time. Additionally, many of the Company's commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for electricity.
Air Quality
Compliance with the Clean Air Act and resulting regulations has been and will continue to be a significant focus for the Company.
In 2012, the EPA finalized the MATS rule, which imposes stringent emissions limits for acid gases, mercury, and particulate matter on coal- and oil-fired electric utility steam generating units. The implementation strategy for the MATS rule included emission controls, retirements, and fuel conversions at affected units. All of the Company's units that are subject to the MATS rule completed the measures necessary to achieve compliance with this rule or were retired prior to or during 2016.
The EPA regulates ground level ozone concentrations through implementation of an eight-hour ozone National Ambient Air Quality Standard (NAAQS). In 2008, the EPA adopted a revised eight-hour ozone NAAQS and published its final area designations in 2012. All areas within the Company's service territory have achieved attainment of the 2008 standard. In October 2015, the EPA published a more stringent eight-hour ozone NAAQS. This new standard could potentially require additional emission controls, improvements in control efficiency, and operational fuel changes and could affect the siting of new generating facilities. States were required to recommend area designations by October 2016, and no areas within the Company's service territory were proposed for designation as nonattainment.
The EPA regulates fine particulate matter concentrations through an annual and 24-hour average NAAQS, based on standards promulgated in 1997, 2006, and 2012. All areas in which the Company's generating units are located have been determined by the EPA to be in attainment with those standards.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

In 2010, the EPA revised the NAAQS for sulfur dioxide (SO2), establishing a new one-hour standard. No areas within the Company's service territory have been designated as nonattainment under this standard. However, in 2015, the EPA finalized a data requirements rule to support final EPA designation decisions for all remaining areas under the SO2 standard, which could result in nonattainment designations for areas within the Company's service territory. Nonattainment designations could require additional reductions in SO2 emissions and increased compliance and operational costs.
On July 6, 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR). CSAPR is an emissions trading program that limits SO2 and nitrogen oxide (NOx) emissions from power plants in two phases – Phase 1 in 2015 and Phase 2 in 2017. On October 26, 2016, the EPA published a final rule that updates the CSAPR ozone season NOx program, beginning in 2017, and establishes more stringent ozone-season emissions budgets in Alabama and Mississippi. The State of Alabama is also in the CSAPR annual SO2 and NOx programs.
The EPA finalized regional haze regulations in 2005, with a goal of restoring natural visibility conditions in certain areas (primarily national parks and wilderness areas) by 2064. The rule involves the application of best available retrofit technology to certain sources, including fossil fuel-fired generating facilities, built between 1962 and 1977 and any additional emissions reductions necessary for each designated area to achieve reasonable progress toward the natural visibility conditions goal by 2018 and for each 10-year period thereafter. On December 14, 2016, the EPA finalized revisions to the regional haze regulations. These regulations establish a deadline of July 31, 2021 for states to submit revised SIPs to the EPA demonstrating reasonable progress toward the statutory goal of achieving natural background conditions by 2064. State implementation of the reasonable progress requirements defined in this final rule could require further reductions in SO2 or NOx emissions.
In June 2015, the EPA published a final rule requiring certain states (including Alabama and Mississippi) to revise or remove the provisions of their SIPs relating to the regulation of excess emissions at industrial facilities, including fossil fuel-fired generating facilities, during periods of startup, shut-down, or malfunction (SSM), and many states have submitted proposed SIP revisions in response to the rule.
The Company has developed and continually updates a comprehensive environmental compliance strategy to assess compliance obligations associated with the current and proposed environmental requirements discussed above. These regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and results of operations, cash flows, and financial condition if such costs are not recovered through regulated rates or through PPAs. The ultimate impact of the eight-hour ozone and SO2 NAAQS, CSAPR, regional haze regulations, and SSM rule will depend on various factors, such as implementation, adoption, or other action at the state level, and the outcome of pending and/or future legal challenges, and cannot be determined at this time.
See Note 3 to the financial statements under "Retail Regulatory Matters – Environmental Compliance Overview Plan" for additional information.
Water Quality
The EPA's final rule establishing standards for reducing effects on fish and other aquatic life caused by new and existing cooling water intake structures at existing power plants and manufacturing facilities became effective in 2014. The effect of this final rule will depend on the results of additional studies that are currently underway and implementation of the rule by regulators based on site-specific factors. National Pollutant Discharge Elimination System (NPDES) permits issued after July 14, 2018 must include conditions to implement and ensure compliance with the standards and protective measures required by the rule.
In November 2015, the EPA published a final effluent guidelines rule which imposes stringent technology-based requirements for certain wastestreams from steam electric power plants. The revised technology-based limits and compliance dates will be incorporated into future renewals of NPDES permits at affected units and may require the installation and operation of multiple technologies sufficient to ensure compliance with applicable new numeric wastewater compliance limits. Compliance deadlines between November 1, 2018 and December 31, 2023 will be established in permits based on information provided for each applicable wastestream.
In 2015, the EPA and the U.S. Army Corps of Engineers jointly published a final rule revising the regulatory definition of waters of the U.S. for all Clean Water Act (CWA) programs. The final rule significantly expands the scope of federal jurisdiction under the CWA and could have significant impacts on economic development projects which could affect customer demand growth. In addition, this rule could significantly increase permitting and regulatory requirements and costs associated with the siting of new facilities and the installation, expansion, and maintenance of transmission and distribution lines. The rule became effective in August 2015 but, in October 2015, the U.S. Court of Appeals for the Sixth Circuit issued an order staying implementation of the final rule. The case is held in abeyance pending review by the U.S. Supreme Court of challenges to the U.S. Court of Appeals for the Sixth Circuit's jurisdiction in the case.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

These water quality regulations could result in significant additional capital expenditures and compliance costs that could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. Also, results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates. The ultimate impact of these final rules will depend on various factors, such as pending and/or future legal challenges, compliance dates, and implementation of the rules, and cannot be determined at this time.
Coal Combustion Residuals
The Company currently manages two electric generating plants in Mississippi and is also part owner of a plant located in Alabama, each with onsite CCR storage units consisting of landfills and surface impoundments (CCR Units). In addition to on-site storage, the Company also sells a portion of its CCR to third parties for beneficial reuse. Individual states regulate CCR and the States of Mississippi and Alabama each have their own regulatory requirements. The Company has an inspection program in place to assist in maintaining the integrity of its coal ash surface impoundments.
The CCR Rule became effective in October 2015. The CCR Rule regulates the disposal of CCR, including coal ash and gypsum, as non-hazardous solid waste in CCR Units at active generating power plants. The CCR Rule does not automatically require closure of CCR Units but includes minimum criteria for active and inactive surface impoundments containing CCR and liquids, lateral expansions of existing units, and active landfills. Failure to meet the minimum criteria can result in the required closure of a CCR Unit. On December 16, 2016, President Obama signed the Water Infrastructure Improvements for the Nation Act (WIIN Act). The WIIN Act allows states to establish permit programs for implementing the CCR Rule, if the EPA approves the program, and allows for federal permits and EPA enforcement where a state permitting program does not exist.
Based on current cost estimates for closure and monitoring of ash ponds pursuant to the CCR Rule, the Company has recorded AROs related to the CCR Rule. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, the Company expects to continue to periodically update these estimates. The Company has posted closure and post-closure care plans to its public website as required by the CCR Rule; however, the ultimate impact of the CCR Rule will depend on the results of initial and ongoing minimum criteria assessments and the implementation of state or federal permit programs. On December 15, 2016, the Mississippi PSC granted a CPCN to the Company authorizing certain projects associated with complying with the CCR Rule. Additionally in this order, the Mississippi PSC also authorized the Company to recover any costs associated with the CPCN, including future monitoring costs, through the ECO plan rate. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information regarding the Company's AROs as of December 31, 2016.
Environmental Remediation
The Company must comply with other environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Company could incur substantial costs to clean up affected sites. The Company conducts studies to determine the extent of any required cleanup and has recognized in its financial statements the costs to clean up known impacted sites. The Company has authority from the Mississippi PSC to recover approved environmental compliance costs through its ECO clause. The Company may be liable for some or all required cleanup costs for additional sites that may require environmental remediation. See Note 3 to the financial statements under "Environmental Matters – Environmental Remediation" for additional information.
Global Climate Issues
In October 2015, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing CO2 emissions from new, modified, and reconstructed units. The other final action, known as the Clean Power Plan, establishes guidelines for states to develop plans to meet EPA-mandated CO2 emission rates or emission reduction goals for existing units. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022 and 2029 and final rates in 2030 and thereafter. At the same time, the EPA published a proposed federal plan and model rule that, when finalized, states can adopt or that would be put in place if a state either does not submit a state plan or its plan is not approved by the EPA. On February 9, 2016, the U.S. Supreme Court granted a stay of the Clean Power Plan, pending disposition of petitions for review with the courts. The stay will remain in effect through the resolution of the litigation, including any review by the U.S. Supreme Court.
These guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions and decisions on infrastructure expansion and improvements. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

costs are not recovered through regulated rates or through PPAs. However, the ultimate financial and operational impact of the final rules on the Company cannot be determined at this time and will depend upon numerous factors, including the outcome of pending legal challenges, including legal challenges filed by the traditional electric operating companies, and any individual state implementation of the EPA's final guidelines in the event the rule is upheld and implemented.
In December 2015, parties to the United Nations Framework Convention on Climate Change – including the United States – adopted the Paris Agreement, which establishes a non-binding universal framework for addressing greenhouse gas emissions based on nationally determined contributions. It also sets in place a process for tracking progress toward the goals every five years. The ultimate impact of this agreement depends on its implementation by participating countries and cannot be determined at this time.
The EPA's greenhouse gas reporting rule requires annual reporting of greenhouse gas emissions expressed in terms of metric tons of CO2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, the Company's 2015 greenhouse gas emissions were approximately 7 million metric tons of CO2 equivalent. The preliminary estimate of the Company's 2016 greenhouse gas emissions on the same basis is approximately 7 million metric tons of CO2 equivalent. The level of greenhouse gas emissions from year to year will depend on the level of generation, the mix of fuel sources, and other factors.
FERC Matters
Municipal and Rural Associations Tariff
In 2013, the FERC accepted a settlement agreement entered into by the Company with its wholesale customers which approved, among other things, the same regulatory treatment for tariff ratemaking as the treatment approved for retail ratemaking by the Mississippi PSC for certain items. The regulatory treatment includes (i) approval to establish a regulatory asset for the portion of non-capitalizable Kemper IGCC-related costs which have been and will continue to be incurred during the construction period for the Kemper IGCC, (ii) authorization to defer as a regulatory asset, for the 10-year period ending October 2021, the difference between the revenue requirement under the purchase option of Plant Daniel Units 3 and 4 (assuming a remaining 30-year life) and the revenue requirement assuming the continuation of the operating lease regulatory treatment with the accumulated deferred balance at the end of the deferral being amortized into wholesale rates over the remaining life of Plant Daniel Units 3 and 4, and (iii) authority to defer in a regulatory asset costs related to the retirement or partial retirement of generating units as a result of environmental compliance rules.
In 2014, the Company reached, and the FERC accepted, a settlement agreement with its wholesale customers for an estimated annual increase in the MRA cost-based tariff of approximately $10 million, effective May 1, 2014. Included in this settlement agreement was a mechanism allowing the Company to adjust the wholesale revenue requirement in a subsequent rate proceeding in the event the Kemper IGCC, or any substantial portion thereof, was placed in service before or after December 1, 2014. Therefore, the Company recorded a regulatory asset as a result of a portion of the Kemper IGCC being placed in service prior to the projected date, which was fully amortized as of December 31, 2015. In May 2015, the FERC accepted a further settlement agreement between the Company and its wholesale customers to forgo a MRA cost-based electric tariff increase by, among other things, increasing the accrual of AFUDC and lowering the portion of CWIP in rate base, effective April 1, 2015, resulting in an estimated annual AFUDC increase of approximately $14 million, of which approximately $11 million is related to the Kemper IGCC.
On March 31, 2016, the Company reached a settlement agreement with its wholesale customers, which was subsequently approved by the FERC, for an increase in wholesale base revenues under the MRA cost-based electric tariff, primarily as a result of placing scrubbers for Plant Daniel Units 1 and 2 in service in November 2015. The settlement agreement became effective for services rendered beginning May 1, 2016, resulting in an estimated annual revenue increase of $7 million under the MRA cost-based electric tariff. Additionally, under the settlement agreement, the tariff customers agreed to similar regulatory treatment for MRA tariff ratemaking as the treatment approved for retail ratemaking under the In-Service Asset Rate Order. This regulatory treatment primarily includes (i) recovery of the Kemper IGCC assets currently operational and providing service to customers and other related costs, (ii) amortization of the Kemper IGCC-related regulatory assets included in rates under the settlement agreement over the 36 months ending April 30, 2019, (iii) Kemper IGCC-related expenses included in rates under the settlement agreement no longer being deferred and charged to expense, and (iv) removing all of the Kemper IGCC CWIP from rate base with a corresponding increase in accrual of AFUDC. The additional resulting AFUDC is estimated to be approximately $14 million through the Kemper IGCC's projected in-service date of mid-March 2017.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Fuel Cost Recovery
The Company has a wholesale MRA and a Market Based (MB) fuel cost recovery factor. Effective with the first billing cycle for September 2016, fuel rates decreased $11 million annually for wholesale MRA customers and $1 million annually for wholesale MB customers. At December 31, 2016 and 2015, the amount of over recovered wholesale MRA fuel costs were approximately $13 million and $24 million, respectively, which is included in over recovered regulatory clause liabilities, current in the balance sheets. Effective January 1, 2017, the wholesale MRA fuel rate increased $10 million annually.
The Company's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on the Company's revenues or net income, but will affect cash flow.
Market-Based Rate Authority
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (including the Company) and Southern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' (including the Company's) and Southern Power's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company) and Southern Power to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Retail Regulatory Matters
General
The Company's rates and charges for service to retail customers are subject to the regulatory oversight of the Mississippi PSC. The Company's rates are a combination of base rates and several separate cost recovery clauses for specific categories of costs. These separate cost recovery clauses address such items as fuel and purchased power, energy efficiency programs, ad valorem taxes, property damage, and the costs of compliance with environmental laws and regulations. Costs not addressed through one of the specific cost recovery clauses are recovered through the Company's base rates. See Note 3 to the financial statements under "Retail Regulatory Matters" and "Integrated Coal Gasification Combined Cycle" for additional information.
In 2012, the Mississippi PSC issued an order for the purpose of investigating and reviewing, for informational purposes only, the ROE formulas used by the Company and all other regulated electric utilities in Mississippi. In 2013, the MPUS filed with the Mississippi PSC its report on the ROE formulas used by the Company and all other regulated electric utilities in Mississippi. The ultimate outcome of this matter cannot be determined at this time.
Renewables
In November 2015, the Mississippi PSC issued orders approving three solar facilities for a combined total of approximately 105 MWs. The Company will purchase all of the energy produced by the solar facilities for the 25-year term under each of the three PPAs. The projects are expected to be in service by the second quarter 2017 and the resulting energy purchases are expected to be recovered through the Company's fuel cost recovery mechanism. The Company may retire the renewable energy credits (REC) generated on behalf of its customers or sell the RECs, separately or bundled with energy, to third parties.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Performance Evaluation Plan
The Company's retail base rates are set under the PEP, a rate plan approved by the Mississippi PSC. Two filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In 2011, the Company submitted its annual PEP lookback filing for 2010, which recommended no surcharge or refund. Later in 2011, the Company received a letter from the MPUS disputing certain items in the 2010 PEP lookback filing. In 2012, the Mississippi PSC issued an order canceling the Company's PEP lookback filing for 2011. In 2013, the MPUS contested the Company's PEP lookback filing for 2012, which indicated a refund due to customers of $5 million. Unresolved matters related to the 2010 PEP lookback filing, which remain under review, also impact the 2012 PEP lookback filing.
In 2013, the Mississippi PSC approved the projected PEP filing for 2013, which resulted in a rate increase of 1.9%, or $15 million, annually, effective March 19, 2013. The Company may be entitled to $3 million in additional revenues related to 2013 as a result of the late implementation of the 2013 PEP rate increase.
In 2014, 2015, and 2016, the Company submitted its annual PEP lookback filings for the prior years, which for 2013 and 2014 each indicated no surcharge or refund and for 2015 indicated a $5 million surcharge. On July 12, 2016 and November 15, 2016, the Company submitted its annual projected PEP filings for 2016 and 2017, respectively, which each indicated no change in rates. The Mississippi PSC suspended each of these filings to allow more time for review.
In 2014, the Mississippi PSC issued an order for the purpose of investigating and reviewing the adoption of a uniform formula rate plan for the Company and other regulated electric utilities in Mississippi.
The ultimate outcome of these matters cannot be determined at this time.
Energy Efficiency
In 2013, the Mississippi PSC approved an energy efficiency and conservation rule requiring electric and gas utilities in Mississippi serving more than 25,000 customers to implement energy efficiency programs and standards.
On May 3, 2016, the Mississippi PSC issued an order approving the Company's Energy Efficiency Cost Rider Compliance filing, which reduced annual retail revenues by approximately $2 million effective with the first billing cycle for June 2016.
On November 30, 2016, the Company submitted its Energy Efficiency Cost Rider Compliance filing, which included an increase of $1 million in annual retail revenues. The ultimate outcome of this matter cannot be determined at this time.
See Note 3 to the financial statements under "Retail Regulatory Matters" for additional information.
Environmental Compliance Overview Plan
In 2012, the Mississippi PSC approved the Company's request for a CPCN to construct scrubbers on Plant Daniel Units 1 and 2, which were placed in service in November 2015. These units are jointly owned by the Company and Gulf Power, with 50% ownership each. In 2014, the Company entered into a settlement agreement with the Sierra Club that, among other things, required the Sierra Club to dismiss or withdraw all pending legal and regulatory challenges to the issuance of the CPCN to construct scrubbers on Plant Daniel Units 1 and 2, which also occurred in 2014. In addition, and consistent with the Company's ongoing evaluation of recent environmental rules and regulations, the Company agreed to retire, repower with natural gas, or convert to an alternative non-fossil fuel source Plant Sweatt Units 1 and 2 (80 MWs) no later than December 2018 (and the units were retired in July 2016). The Company also agreed that it would cease burning coal and other solid fuel at Plant Watson Units 4 and 5 (750 MWs) and begin operating those units solely on natural gas no later than April 2015 (which occurred in April 2015) and cease burning coal and other solid fuel at Plant Greene County Units 1 and 2 (200 MWs) no later than April 2016 (which occurred in February and March 2016, respectively) and begin operating those units solely on natural gas (which occurred in June and July 2016, respectively).
In accordance with a 2011 accounting order from the Mississippi PSC, the Company has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. As of December 31, 2016, $17 million of Plant Greene County costs have been reclassified as regulatory assets and are expected to be recovered through the ECO plan and other existing cost recovery mechanisms over a period to be determined by the Mississippi PSC. The Mississippi PSC approved $41 million of costs that were reclassified to a regulatory asset associated with Plant Watson for amortization over a five-year period that began in July 2016. As a result, these decisions are not expected to have a material impact on the Company's financial statements.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

On August 17, 2016, the Mississippi PSC approved the Company's revised ECO plan filing for 2016, which requested the maximum 2% annual increase in revenues, approximately $18 million, primarily related to the Plant Daniel Units 1 and 2 scrubbers being placed in service in November 2015. The revised rates became effective with the first billing cycle for September 2016. Approximately $22 million of related revenue requirements in excess of the 2% maximum was deferred for inclusion in the 2017 filing.
On February 14, 2017, the Company submitted its ECO plan filing for 2017, which requested an increase in annual revenues over 2016, capped at 2% of total retail revenues, of approximately $18 million, primarily related to the Plant Daniel Units 1 and 2 scrubbers placed in service in November 2015. The revenue requirement in excess of the 2%, approximately $27 million plus carrying costs, will be carried forward to the 2018 filing. The ultimate outcome of this matter cannot be determined at this time.
Fuel Cost Recovery
The Company establishes, annually, a retail fuel cost recovery factor that is approved by the Mississippi PSC. The Company is required to file for an adjustment to the retail fuel cost recovery factor annually. The Mississippi PSC approved the 2016 retail fuel cost recovery factor, effective January 5, 2016, which resulted in an annual revenue decrease of approximately $120 million. On August 17, 2016, the Mississippi PSC approved an additional decrease of $51 million annually in fuel cost recovery rates effective with the first billing cycle for September 2016. At December 31, 2016 and 2015, over recovered retail fuel costs were approximately $37 million and $71 million, respectively, which is included in over recovered regulatory clause liabilities, current in the balance sheets. On January 12, 2017, the Mississippi PSC approved the 2017 retail fuel cost recovery factor, effective February 2017 through January 2018, which will result in an annual revenue increase of approximately $55 million.
The Company's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on the Company's revenues or net income, but will affect cash flow.
Ad Valorem Tax Adjustment
The Company establishes, annually, an ad valorem tax adjustment factor that is approved by the Mississippi PSC to collect the ad valorem taxes paid by the Company. On June 17, 2016, the Mississippi PSC approved the Company's annual ad valorem tax adjustment factor filing for 2016, which included an annual rate decrease of 0.07%, or $1 million in annual retail revenues, primarily due to the prior year over recovery.
System Restoration Rider
In October 2015, the Mississippi PSC approved the Company's 2015 SRR rate filing, which proposed that the SRR rate remain level at zero and the Company continue to accrue $3 million annually to the property damage reserve.
On February 1, 2016, the Company submitted its 2016 SRR rate filing which proposed no changes to either the SRR rate or the annual property damage reserve accrual. On February 19, 2016, the filing was suspended by the Mississippi PSC for review. The ultimate outcome of this matter cannot be determined at this time.
On February 3, 2017, the Company submitted its 2017 SRR rate filing, which proposed that the rate level remain at zero and the Company be allowed to accrue $4 million annually to the property damage reserve in 2017. The ultimate outcome of this matter cannot be determined at this time.
See Note 1 to the financial statements under "Provision for Property Damage" for additional information.
Storm Damage Cost Recovery
In connection with the damage associated with Hurricane Katrina, the Mississippi PSC authorized the issuance of system restoration bonds in 2006. In accordance with a Mississippi PSC order dated January 24, 2017, the Company has adjusted the System Restoration Charge implemented after Hurricane Katrina to zero. Upon completion of the proper defeasance process by the Mississippi State Bond Commission, the Company's obligations in relation to system restoration bonds issued after Hurricane Katrina in 2005 will be completely satisfied.
Provision for Property Damage
On January 21, 2017, a tornado caused extensive damage to the Company's transmission and distribution infrastructure. Preliminary storm damage repairs have been estimated at $11 million. A portion of these costs may be charged to the retail property damage reserve and addressed in a subsequent SRR rate filing. The ultimate outcome of this matter cannot be determined at this time.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Integrated Coal Gasification Combined Cycle
Kemper IGCC Overview
The Kemper IGCC utilizes IGCC technology with an expected output capacity of 582 MWs. The Kemper IGCC is fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by the Company and situated adjacent to the Kemper IGCC. The mine, operated by North American Coal Corporation, started commercial operation in 2013. In connection with the Kemper IGCC, the Company constructed and plans to operate approximately 61 miles of CO2 pipeline infrastructure for the transport of captured CO2 for use in enhanced oil recovery.
Kemper IGCC Schedule and Cost Estimate
In 2012, the Mississippi PSC issued the 2012 MPSC CPCN Order, a detailed order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper IGCC. The certificated cost estimate of the Kemper IGCC included in the 2012 MPSC CPCN Order was $2.4 billion, net of $245 million of Initial DOE Grants and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, and AFUDC related to the Kemper IGCC. The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper IGCC was originally projected to be placed in service inMay 2014. The Company placed the combined cycle and the associated common facilities portion of the Kemper IGCC in service in August 2014. The remainder of the plant, including the gasifiers and the gas clean-up facilities, represents first-of-a-kind technology. The initial production of syngas began on July 14, 2016 for gasifier "B" and on September 13, 2016 for gasifier "A." The Company achieved integrated operation of both gasifiers on January 29, 2017, including the production of electricity from syngas in both combustion turbines. The Company subsequently completed a brief outage to repair and make modifications to further improve the plant's ability to achieve sustained operations sufficient to support placing the plant in service for customers. Efforts to reach sustained operation of both gasifiers and production of electricity from syngas in both combustion turbines are in process. The plant has produced and captured CO2, and has produced sulfuric acid and ammonia, all of acceptable quality under the related off-take agreements. On February 20, 2017, the Company determined gasifier "B," which has been producing syngas over 60% of the time since early November 2016, requires an outage to remove ash deposits from its ash removal system. Gasifier "A" and combustion turbine "A" are expected to remain in operation, producing electricity from syngas, as well as producing chemical by-products. As a result, the Company currently expects the remainder of the Kemper IGCC, including both gasifiers, will be placed in service by mid-March 2017.
The Company's Kemper IGCC 2010 project estimate, current cost estimate (which includes the impacts of the Mississippi Supreme Court's (Court) decision discussed herein under "Rate Recovery of Kemper IGCC Costs 2013 MPSC Rate Order"), and actual costs incurred as of December 31, 2016, all of which include 100% of the costs for the Kemper IGCC, are as follows:
Cost Category
2010 Project Estimate(a)
 
Current Cost Estimate(b)
 Actual Costs
 (in billions)
Plant Subject to Cost Cap(c)(e)
$2.40
 $5.64
 $5.44
Lignite Mine and Equipment0.21
 0.23
 0.23
CO2 Pipeline Facilities
0.14
 0.11
 0.11
AFUDC(d)
0.17
 0.79
 0.75
Combined Cycle and Related Assets Placed in
Service – Incremental(e)

 0.04
 0.04
General Exceptions0.05
 0.10
 0.09
Deferred Costs(e)

 0.22
 0.21
Additional DOE Grants
 (0.14) (0.14)
Total Kemper IGCC(f)
$2.97
 $6.99
 $6.73
(a)
The 2010 Project Estimate is the certificated cost estimate adjusted to include the certificated estimate for the CO2 pipeline facilities approved in 2011 by the Mississippi PSC, as well as the lignite mine and equipment, AFUDC, and general exceptions.
(b)Amounts in the Current Cost Estimate include certain estimated post-in-service costs which are expected to be subject to the cost cap.
(c)
The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The Current Cost Estimate and the Actual Costs include non-incremental operating and maintenance costs related to the combined cycle and associated

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

common facilities placed in service in August 2014 that are subject to the $2.88 billion cost cap and exclude post-in-service costs for the lignite mine. See "Rate Recovery of Kemper IGCC Costs – 2013 MPSC Rate Order" herein for additional information.
(d)
The Company's 2010 Project Estimate included recovery of financing costs during construction rather than the accrual of AFUDC. This approach was not approved by the Mississippi PSC as described in "Rate Recovery of Kemper IGCC Costs 2013 MPSC Rate Order." The Current Cost Estimate also reflects the impact of a settlement agreement with the wholesale customers for cost-based rates under FERC's jurisdiction. See "FERC Matters" herein for additional information.
(e)Non-capital Kemper IGCC-related costs incurred during construction were initially deferred as regulatory assets. Some of these costs are now included in rates and are being recognized through income; however, such costs continue to be included in the Current Cost Estimate and the Actual Costs at December 31, 2016. The wholesale portion of debt carrying costs, whether deferred or recognized through income, is not included in the Current Cost Estimate and the Actual Costs at December 31, 2016. See "Rate Recovery of Kemper IGCC Costs – Regulatory Assets and Liabilities" herein for additional information.
(f)The Current Cost Estimate and the Actual Costs include $2.76 billion that will not be recovered for costs above the cost cap, $0.83 billion of investment costs included in current rates for the combined cycle and related assets in service, and $0.08 billion of costs that were previously expensed for the combined cycle and related assets in service. The Current Cost Estimate and the Actual Costs exclude $0.25 billion of costs not included in current rates for post-June 2013 mine operations, the lignite fuel inventory, and the nitrogen plant capital lease, which will be included in the 2017 Rate Case to be filed by June 3, 2017. See Note 1 to the financial statements under "Fuel Inventory," Note 6 to the financial statements under "Capital Leases," and "Rate Recovery of Kemper IGCC Costs – 2017 Rate Case" herein for additional information.
Of the total costs, including post-in-service costs for the lignite mine, incurred as of December 31, 2016, $3.67 billion was included in property, plant, and equipment (which is net of the Initial DOE Grants, the Additional DOE Grants, and estimated probable losses of $2.84 billion), $6 million in other property and investments, $75 million in fossil fuel stock, $47 million in materials and supplies, $29 million in other regulatory assets, current, $172 million in other regulatory assets, deferred, $3 million in other current assets, and $14 million in other deferred charges and assets in the balance sheet.
The Company does not intend to seek rate recovery for any costs related to the construction of the Kemper IGCC that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The Company recorded pre-taxcharges to income for revisions to the cost estimate of $348 million ($215 million after tax), $365 million ($226 million after tax), and $868 million ($536 million after tax) in 2016, 2015, and 2014, respectively. Since 2012, in the aggregate, the Company has incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016. The increases to the cost estimate in 2016 primarily reflect $186 million for the extension of the Kemper IGCC's projected in-service date from August 31, 2016 to March 15, 2017 and $162 million for increased efforts related to operational readiness and challenges in start-up and commissioning activities, including the cost of repairs and modifications to both gasifiers, mechanical improvements to coal feed and ash management systems, and outage work, as well as certain post-in-service costs expected to be subject to the cost cap.
In addition to the current construction cost estimate, the Company is identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap.
Any extension of the in-service date beyond mid-March 2017 is currently estimated to result in additional base costs of approximately $25 million to $35 million per month, which includes maintaining necessary levels of start-up labor, materials, and fuel, as well as operational resources required to execute start-up and commissioning activities. Additional costs may be required for remediation of any further equipment and/or design issues identified. Any extension of the in-service date with respect to the Kemper IGCC beyond mid-March 2017 would also increase costs for the Cost Cap Exceptions, which are not subject to the $2.88 billion cost cap established by the Mississippi PSC. These costs include AFUDC, which is currently estimated to total approximately $16 million per month, as well as carrying costs and operating expenses on Kemper IGCC assets placed in service and consulting and legal fees of approximately $3 million per month. For additional information, see "2015 Rate Case" herein.
Further cost increases and/or extensions of the expected in-service date may result from factors including, but not limited to, difficulties integrating the systems required for sustained operations, sustaining nitrogen supply, major equipment failure, unforeseen engineering or design problems including any repairs and/or modifications to systems, and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC). Any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in the Company's statements of income and these changes could be material.
Rate Recovery of Kemper IGCC Costs
Given the variety of potential scenarios and the uncertainty of the outcome of future regulatory proceedings with the Mississippi PSC (and any subsequent related legal challenges), the ultimate outcome of the rate recovery matters discussed herein, including

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

the resolution of legal challenges, cannot now be determined but could result in further material charges that could have a material impact on the Company's results of operations, financial condition, and liquidity.
As of December 31, 2016, in addition to the $2.76 billion of costs above the Mississippi PSC's $2.88 billion cost cap that have been recognized as a charge to income, the Company had incurred approximately $1.99 billion in costs subject to the cost cap and approximately $1.46 billion in Cost Cap Exceptions related to the construction and start-up of the Kemper IGCC that are not included in current rates. These costs primarily relate to the following:
Cost CategoryActual Costs
 (in billions)
Gasifiers and Gas Clean-up Facilities$1.88
Lignite Mine Facility0.31
CO2 Pipeline Facilities
0.11
Combined Cycle and Common Facilities0.16
AFUDC0.69
General exceptions0.07
Plant inventory0.03
Lignite inventory0.08
Regulatory and other deferred assets0.12
Subtotal$3.45
Additional DOE Grants(0.14)
Total$3.31
Of these amounts, approximately 29% is related to wholesale and approximately 71% is related to retail, including the 15% portion that was previously contracted to be sold to SMEPA. The Company and its wholesale customers have generally agreed to the similar regulatory treatment for wholesale tariff purposes as approved by the Mississippi PSC for retail for Kemper IGCC-related costs. See "FERC Matters – Municipal and Rural Associations Tariff" and "Termination of Proposed Sale of Undivided Interest" herein for further information.
Prudence
On August 17, 2016, the Mississippi PSC issued an order establishing a discovery docket to manage all filings related to the prudence of the Kemper IGCC. On October 3, 2016, the Company made a required compliance filing, which included a review and explanation of differences between the Kemper IGCC project estimate set forth in the 2010 CPCN proceedings and the most recent Kemper IGCC project estimate, as well as comparisons of current cost estimates and current expected plant operational parameters to the estimates presented in the 2010 CPCN proceedings for the first five years after the Kemper IGCC is placed in service. Compared to amounts presented in the 2010 CPCN proceedings, operations and maintenance expenses have increased an average of $105 million annually and maintenance capital has increased an average of $44 million annually for the first full five years of operations for the Kemper IGCC. Additionally, while the current estimated operational availability estimates reflect ultimate results similar to those presented in the 2010 CPCN proceedings, the ramp up period for the current estimates reflects a lower starting point and a slower escalation rate. On November 17, 2016, the Company submitted a supplemental filing to the October 3, 2016 compliance filing to present revised non-fuel operations and maintenance expense projections for the first year after the Kemper IGCC is placed in service. This supplemental filing included approximately $68 million in additional estimated operations and maintenance costs expected to be required to support the operations of the Kemper IGCC during that period. The Company will not seek recovery of the $68 million in additional estimated costs from customers if incurred.
The Company expects the Mississippi PSC to address these matters in connection with the 2017 Rate Case.
Economic Viability Analysis
In the fourth quarter 2016, as a part of its Integrated Resource Plan process, the Southern Company system completed its regular annual updated fuel forecast, the 2017 Annual Fuel Forecast. This updated fuel forecast reflected significantly lower long-term estimated costs for natural gas than were previously projected.
As a result of the updated long-term natural gas forecast, as well as the revised operating expense projections reflected in the discovery docket filings discussed above, on February 21, 2017, the Company filed an updated project economic viability

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Mississippi Power Company 2016 Annual Report

analysis of the Kemper IGCC as required under the 2012 MPSC CPCN Order confirming authorization of the Kemper IGCC. The project economic viability analysis measures the life cycle economics of the Kemper IGCC compared to feasible alternatives, natural gas combined cycle generating units, under a variety of scenarios and considering fuel, operating and capital costs, and operating characteristics, as well as federal and state taxes and incentives. The reduction in the projected long-term natural gas prices in the 2017 Annual Fuel Forecast and, to a lesser extent, the increase in the estimated Kemper IGCC operating costs, negatively impact the updated project economic viability analysis.
The Company expects the Mississippi PSC to address this matter in connection with the 2017 Rate Case.
2017 Accounting Order Request
After the remainder of the plant is placed in service, AFUDC equity of approximately $11 million per month will no longer be recorded in income, and the Company expects to incur approximately $25 million per month in depreciation, taxes, operations and maintenance expenses, interest expense, and regulatory costs in excess of current rates. The Company expects to file a request for authority from the Mississippi PSC and the FERC to defer all Kemper IGCC costs incurred after the in-service date that cannot be capitalized, are not included in current rates, and are not required to be charged against earnings as a result of the $2.88 billion cost cap until such time as the Mississippi PSC completes its review and includes the resulting allowable costs in rates. In the event that the Mississippi PSC does not grant the Company's request, these monthly expenses will be charged to income as incurred and will not be recoverable through rates.
2017 Rate Case
The Company continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. The Company also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further herein and under "Prudence," "Lignite Mine and CO2 Pipeline Facilities," "Termination of Proposed Sale of Undivided Interest," and "Income Tax Matters," these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Legislation to authorize a multi-year rate plan and legislation to provide for alternate financing through securitization of up to $1.0 billion of prudently-incurred costs was enacted into law in 2013. The Company expects to utilize this legislation to securitize prudently-incurred qualifying facility costs in excess of the certificated cost estimate of $2.4 billion. Qualifying facility costs include, but are not limited to, pre-construction costs, construction costs, regulatory costs, and accrued AFUDC. The Court's decision regarding the 2013 MPSC Rate Order did not impact the Company's ability to utilize alternate financing through securitization or the February 2013 legislation.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, the Company is developing both a traditional rate case requesting full cost recovery of the amounts not currently in rates and a rate mitigation plan that together represent the Company's probable filing strategy. The Company also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both the Company and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on the Company's financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, the Company intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
The Company has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
2015 Rate Case
On August 13, 2015, the Mississippi PSC approved the Company's request for interim rates, which presented an alternative rate proposal (In-Service Asset Proposal) designed to recover the Company's costs associated with the Kemper IGCC assets that are commercially operational and currently providing service to customers (the transmission facilities, combined cycle, natural gas

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Mississippi Power Company 2016 Annual Report

pipeline, and water pipeline) and other related costs. The interim rates were designed to collect approximately $159 million annually and became effective in September 2015, subject to refund and certain other conditions.
On December 3, 2015, the Mississippi PSC issued the In-Service Asset Rate Order adopting in full the 2015 Stipulation entered into between the Company and the MPUS regarding the In-Service Asset Proposal. The In-Service Asset Rate Order provided for retail rate recovery of an annual revenue requirement of approximately $126 million, based on the Company's actual average capital structure, with a maximum common equity percentage of 49.733%, a 9.225% return on common equity, and actual embedded interest costs. The In-Service Asset Rate Order also included a prudence finding of all costs in the stipulated revenue requirement calculation for the in-service assets. The stipulated revenue requirement excluded the costs of the Kemper IGCC related to the 15% undivided interest that was previously projected to be purchased by SMEPA but reserved the Company's right to seek recovery in a future proceeding. See "Termination of Proposed Sale of Undivided Interest" herein for additional information. The Company is required to file the 2017 Rate Case by June 3, 2017.
With implementation of the new rates on December 17, 2015, the interim rates were terminated and, in March 2016, the Company completed customer refunds of approximately $11 million for the difference between the interim rates collected and the permanent rates.
2013 MPSC Rate Order
In January 2013, the Company entered into a settlement agreement with the Mississippi PSC that was intended to establish the process for resolving matters regarding cost recovery related to the Kemper IGCC (2013 Settlement Agreement). Under the 2013 Settlement Agreement, the Company agreed to limit the portion of prudently-incurred Kemper IGCC costs to be included in retail rate base to the $2.4 billion certificated cost estimate, plus the Cost Cap Exceptions, but excluding AFUDC, and any other costs permitted or determined to be excluded from the $2.88 billion cost cap by the Mississippi PSC. In March 2013, the Mississippi PSC issued a rate order approving retail rate increases of 15% effective March 19, 2013 and 3% effective January 1, 2014, which collectively were designed to collect $156 million annually beginning in 2014 (2013 MPSC Rate Order) to be used to mitigate customer rate impacts after the Kemper IGCC is placed in service, based on a mirror CWIP methodology (Mirror CWIP rate).
On February 12, 2015, the Court reversed the 2013 MPSC Rate Order based on, among other things, its findings that (1) the Mirror CWIP rate treatment was not provided for under the Baseload Act and (2) the Mississippi PSC should have determined the prudence of Kemper IGCC costs before approving rate recovery through the 2013 MPSC Rate Order. The Court also found the 2013 Settlement Agreement unenforceable due to a lack of public notice for the related proceedings. On July 7, 2015, the Mississippi PSC ordered that the Mirror CWIP rate be terminated effective July 20, 2015 and required the fourth quarter 2015refund of the $342 million collected under the 2013 MPSC Rate Order, along with associated carrying costs of $29 million. The Court's decision did not impact the 2012 MPSC CPCN Order or the February 2013 legislation described above.
Because the 2013 MPSC Rate Order did not provide for the inclusion of CWIP in rate base as permitted by the Baseload Act, the Company continues to record AFUDC on the Kemper IGCC. Through December 31, 2016, AFUDC recorded since the original May 2014 estimated in-service date for the Kemper IGCC has totaled $398 million, which will continue to accrue at approximately $16 million per month until the remainder of the plant is placed in service. The Company has not recorded any AFUDC on Kemper IGCC costs in excess of the $2.88 billion cost cap, except for Cost Cap Exception amounts.
2012 MPSC CPCN Order
The 2012 MPSC CPCN Order included provisions relating to both the Company's recovery of financing costs during the course of construction of the Kemper IGCC and the Company's recovery of costs following the date the Kemper IGCC is placed in service. With respect to recovery of costs following the in-service date of the Kemper IGCC, the 2012 MPSC CPCN Order provided for the establishment of operational cost and revenue parameters including availability factor, heat rate, lignite heat content, and chemical revenue based upon assumptions in the Company's petition for the CPCN. The Company expects the Mississippi PSC to apply operational parameters in connection with the 2017 Rate Case and future proceedings related to the operation of the Kemper IGCC. To the extent the Mississippi PSC determines the Kemper IGCC does not meet the operational parameters ultimately adopted by the Mississippi PSC or the Company incurs additional costs to satisfy such parameters, there could be a material adverse impact on the Company's financial statements. See "Prudence" herein for additional information.
Regulatory Assets and Liabilities
Consistent with the treatment of non-capital costs incurred during the pre-construction period, the Mississippi PSC issued an accounting order in 2011 granting the Company the authority to defer all non-capital Kemper IGCC-related costs to a regulatory asset through the in-service date, subject to review of such costs by the Mississippi PSC. Such costs include, but are not limited

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

to, carrying costs on Kemper IGCC assets currently placed in service, costs associated with Mississippi PSC and MPUS consultants, prudence costs, legal fees, and operating expenses associated with assets placed in service.
In August 2014, the Company requested confirmation by the Mississippi PSC of the Company's authority to defer all operating expenses associated with the operation of the combined cycle subject to review of such costs by the Mississippi PSC. In addition, the Company is authorized to accrue carrying costs on the unamortized balance of such regulatory assets at a rate and in a manner to be determined by the Mississippi PSC in future cost recovery mechanism proceedings. Beginning in the third quarter 2015 and the second quarter 2016, in connection with the implementation of retail and wholesale rates, respectively, the Company began expensing certain ongoing project costs and certain retail debt carrying costs (associated with assets placed in service and other non-CWIP accounts) that previously were deferred as regulatory assets and began amortizing certain regulatory assets associated with assets placed in service and consulting and legal fees. The amortization periods for these regulatory assets vary from two years to 10 years as set forth in the In-Service Asset Rate Order and the settlement agreement with wholesale customers. As of December 31, 2016, the balance associated with these regulatory assets was $97 million, of which $29 million is included in current assets. Other regulatory assets associated with the remainder of the Kemper IGCC totaled $104 million as of December 31, 2016. The amortization period for these assets is expected to be determined by the Mississippi PSC in the 2017 Rate Case. See "FERC Matters" herein for additional information related to the 2016 settlement agreement with wholesale customers.
The In-Service Asset Rate Order requires the Company to submit an annual true-up calculation of its actual cost of capital, compared to the stipulated total cost of capital, with the first occurring as of May 31, 2016. At December 31, 2016, the Company's related regulatory liability included in its balance sheet totaled approximately $7 million. See "2015 Rate Case" herein for additional information.
Also see Note 1 to the financial statements under "Regulatory Assets and Liabilities" for additional information.
Lignite Mine and CO2 Pipeline Facilities
In conjunction with the Kemper IGCC, the Company owns the lignite mine and equipment and has acquired and will continue to acquire mineral reserves located around the Kemper IGCC site. The mine started commercial operation in June 2013.
In 2010, the Company executed a 40-year management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is operating and managing the mining operations. The contract with Liberty Fuels is effective through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and the Company has a contractual obligation to fund all reclamation activities. In addition to the obligation to fund the reclamation activities, the Company currently provides working capital support to Liberty Fuels through cash advances for capital purchases, payroll, and other operating expenses. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" and "Variable Interest Entities" for additional information.
In addition, the Company has constructed and will operate the CO2 pipeline for the planned transport of captured CO2 for use in enhanced oil recovery. The Company entered into agreements with Denbury Onshore (Denbury) and Treetop Midstream Services, LLC (Treetop), pursuant to which Denbury would purchase 70% of the CO2 captured from the Kemper IGCC and Treetop would purchase 30% of the CO2 captured from the Kemper IGCC. On June 3, 2016, the Company cancelled its contract with Treetop and amended its contract with Denbury to reflect, among other things, Denbury's agreement to purchase 100% of the CO2 captured from the Kemper IGCC, an initial contract term of 16 years, and termination rights if the Company has not satisfied its contractual obligation to deliver captured CO2 by July 1, 2017, in addition to Denbury's existing termination rights in the event of a change in law, force majeure, or an event of default by the Company. Any termination or material modification of the agreement with Denbury could impact the operations of the Kemper IGCC and result in a material reduction in the Company's revenues to the extent the Company is not able to enter into other similar contractual arrangements or otherwise sequester the CO2 produced. Additionally, sustained oil price reductions could result in significantly lower revenues than the Company originally forecasted to be available to offset customer rate impacts, which could have a material impact on the Company's financial statements.
The ultimate outcome of these matters cannot be determined at this time.
Termination of Proposed Sale of Undivided Interest
In 2010 and as amended in 2012, the Company and SMEPA entered into an agreement whereby SMEPA agreed to purchase a 15% undivided interest in the Kemper IGCC (15% Undivided Interest). On May 20, 2015, SMEPA notified the Company of its termination of the agreement. The Company previously received a total of $275 million of deposits from SMEPA that were required to be returned to SMEPA with interest. On June 3, 2015, Southern Company, pursuant to its guarantee obligation,

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

returned approximately $301 million to SMEPA. Subsequently, the Company issued a promissory note in the aggregate principal amount of approximately $301 million to Southern Company, which matures on December 1, 2017.
Litigation
On April 26, 2016, a complaint against the Company was filed in Harrison County Circuit Court (Circuit Court) by Biloxi Freezing & Processing Inc., Gulfside Casino Partnership, and John Carlton Dean, which was amended and refiled on July 11, 2016 to include, among other things, Southern Company as a defendant. On August 12, 2016, Southern Company and the Company removed the case to the U.S. District Court for the Southern District of Mississippi. The plaintiffs filed a request to remand the case back to state court, which was granted on November 17, 2016. The individual plaintiff, John Carlton Dean, alleges that the Company and Southern Company violated the Mississippi Unfair Trade Practices Act. All plaintiffs have alleged that the Company and Southern Company concealed, falsely represented, and failed to fully disclose important facts concerning the cost and schedule of the Kemper IGCC and that these alleged breaches have unjustly enriched the Company and Southern Company. The plaintiffs seek unspecified actual damages and punitive damages; ask the Circuit Court to appoint a receiver to oversee, operate, manage, and otherwise control all affairs relating to the Kemper IGCC; ask the Circuit Court to revoke any licenses or certificates authorizing the Company or Southern Company to engage in any business related to the Kemper IGCC in Mississippi; and seek attorney's fees, costs, and interest. The plaintiffs also seek an injunction to prevent any Kemper IGCC costs from being charged to customers through electric rates. On December 7, 2016, Southern Company and the Company filed motions to dismiss.
On June 9, 2016, Treetop, Greenleaf, Tenrgys, LLC, Tellus Energy, LLC, WCOA, LLC, and Tellus Operating Group filed a complaint against the Company, Southern Company, and SCS in the state court in Gwinnett County, Georgia. The complaint relates to the cancelled CO2 contract with Treetop and alleges fraudulent misrepresentation, fraudulent concealment, civil conspiracy, and breach of contract on the part of the Company, Southern Company, and SCS and seeks compensatory damages of $100 million, as well as unspecified punitive damages. Southern Company, the Company, and SCS have moved to compel arbitration pursuant to the terms of the CO2 contract.
The Company believes these legal challenges have no merit; however, an adverse outcome in these proceedings could have a material impact on the Company's results of operations, financial condition, and liquidity. The Company will vigorously defend itself in these matters, and the ultimate outcome of these matters cannot be determined at this time.
Baseload Act
In 2008, the Baseload Act was signed by the Governor of Mississippi. The Baseload Act authorizes, but does not require, the Mississippi PSC to adopt a cost recovery mechanism that includes in retail base rates, prior to and during construction, all or a portion of the prudently-incurred pre-construction and construction costs incurred by a utility in constructing a base load electric generating plant. Prior to the passage of the Baseload Act, such costs would traditionally be recovered only after the plant was placed in service. The Baseload Act also provides for periodic prudence reviews by the Mississippi PSC and prohibits the cancellation of any such generating plant without the approval of the Mississippi PSC. In the event of cancellation of the construction of the plant without approval of the Mississippi PSC, the Baseload Act authorizes the Mississippi PSC to make a public interest determination as to whether and to what extent the utility will be afforded rate recovery for costs incurred in connection with such cancelled generating plant. See "Rate Recovery of Kemper IGCC Costs" herein for additional information.
Income Tax Matters
See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information about the Kemper IGCC.
Bonus Depreciation
In December 2015, the Protecting Americans from Tax Hikes (PATH) Act was signed into law. Bonus depreciation was extended for qualified property placed in service through 2020. The PATH Act allows for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension of bonus depreciation included in the PATH Act is expected to result in approximately $20 million of positive cash flows for the 2016 tax year, which was not all realized in 2016 due to a projected consolidated net operating loss (NOL) for Southern Company. Dependent upon placing the remainder of the Kemper IGCC in service by December 31, 2017, the Company expects approximately $370 million of positive cash flows from bonus depreciation for the 2017 tax year, which may not all be realized in 2017 due to additional NOL projections for the 2017 tax year. See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" and Note 5 to the financial statements under "Current and Deferred Income Taxes Net Operating Loss" for additional information. The ultimate outcome of this matter cannot be determined at this time.

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Mississippi Power Company 2016 Annual Report

Investment Tax Credits
The IRS allocated $133 million (Phase I) and $279 million (Phase II) of Internal Revenue Code Section 48A tax credits to the Company in connection with the Kemper IGCC. These tax credits were dependent upon meeting the IRS certification requirements, including an in-service date no later than May 11, 2014 for the Phase I credits and April 19, 2016 for the Phase II credits. In addition, the capture and sequestration (via enhanced oil recovery) of at least 65% of the CO2 produced by the Kemper IGCC during operations in accordance with the Internal Revenue Code was also a requirement of the Phase II credits. As a result of schedule extensions for the Kemper IGCC, the Phase I tax credits were recaptured in 2013 and the Phase II tax credits were recaptured in 2015.
Section 174 Research and Experimental Deduction
Southern Company, on behalf of the Company, has reflected deductions for research and experimental (R&E) expenditures related to the Kemper IGCC in its federal income tax calculations since 2013 and has filed amended federal income tax returns for 2008 through 2013 to also include such deductions. The Kemper IGCC is based on first-of-a-kind technology, and Southern Company believes that a significant portion of the plant costs qualify as deductible R&E expenditures under Internal Revenue Code Section 174. In December 2016, Southern Company and the IRS reached a proposed settlement, subject to approval of the U.S. Congress Joint Committee on Taxation, resolving a methodology for these deductions. Due to the uncertainty related to this tax position, the Company had unrecognized tax benefits associated with these R&E deductions totaling approximately $464 million as of December 31, 2016. See Note 5 to the financial statements under "Unrecognized Tax Benefits" for additional information. This matter is expected to be resolved in the next 12 months; however, the ultimate outcome of this matter cannot be determined at this time.
Other Matters
The Company is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, the Company is subject to certain claims and legal actions arising in the ordinary course of business. The Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements, such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.
The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein or in Note 3 to the financial statements, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements. See Note 3 to the financial statements for a discussion of various other contingencies, regulatory matters, and other matters being litigated which may affect future earnings potential.
In 2013, the Company submitted a claim under the Deepwater Horizon Economic and Property Damages Settlement Agreement associated with the oil spill that occurred in 2010 in the Gulf of Mexico. The ultimate outcome of this matter cannot be determined at this time.
The SEC is conducting a formal investigation of Southern Company and the Company concerning the estimated costs and expected in-service date of the Kemper IGCC. Southern Company and the Company believe the investigation is focused primarily on periods subsequent to 2010 and on accounting matters, disclosure controls and procedures, and internal controls over financial reporting associated with the Kemper IGCC. See ACCOUNTING POLICIES – "Application of Critical Accounting Policies and Estimates" herein for additional information on the Kemper IGCC estimated construction costs and expected in-service date. The ultimate outcome of this matter cannot be determined at this time; however, it is not expected to have a material impact on the Company's financial statements.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Company prepares its financial statements in accordance with GAAP. Significant accounting policies are described in Note 1 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on the Company's results of operations and related disclosures. Different assumptions and measurements could produce estimates that

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
The Company is subject to retail regulation by the Mississippi PSC and wholesale regulation by the FERC. These regulatory agencies set the rates the Company is permitted to charge customers based on allowable costs. As a result, the Company applies accounting standards which require the financial statements to reflect the effects of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costs or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on the Company's financial statements as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurred by the Company; therefore, the accounting estimates inherent in specific costs such as depreciation and pension and other postretirement benefits have less of a direct impact on the Company's results of operations and financial condition than they would on a non-regulated company.
As reflected in Note 1 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amounts of such regulatory assets and liabilities and could adversely impact the Company's financial statements.
Kemper IGCC Estimated Construction Costs, Project Completion Date, and Rate Recovery
During 2016, the Company further revised its cost estimate to complete construction and start-up of the Kemper IGCC to an amount that exceeds the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The Company does not intend to seek any rate recovery for any costs related to the construction of the Kemper IGCC that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions.
As a result of revisions to the cost estimate, the Company recorded total pre-tax charges to income for the estimated probable losses on the Kemper IGCC subject to the construction cost cap of $127 million ($78 million after tax) in the fourth quarter 2016, $88 million ($54 million after tax) in the third quarter 2016, $81 million ($50 million after tax) in the second quarter 2016, $53 million ($33 million after tax) in the first quarter 2016, $183 million ($113 million after tax) in the fourth quarter 2015, $150 million ($93 million after tax) in the third quarter 2015, $23 million ($14 million after tax) in the second quarter 2015, $9 million ($6 million after tax) in the first quarter 2015, $70 million ($43 million after tax) in the fourth quarter 2014, $418 million ($258 million after tax) in the third quarter 2014, $380 million ($235 million after tax) in the first quarter 2014, $40 million ($25 million after tax) in the fourth quarter 2013, $150 million ($93 million after tax) in the third quarter 2013, $450 million ($278 million after tax) in the second quarter 2013, $462 million ($285 million after tax) in the first quarter 2013, and $78 million ($48 million after tax) in the fourth quarter 2012. In the aggregate, the Company has incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016.
The Company's revised cost estimate reflects an expected in-service date of mid-March 2017 and includes certain post-in-service costs which are expected to be subject to the cost cap. The Company has experienced, and may continue to experience, material changes in the cost estimate for the Kemper IGCC. Further cost increases and/or extensions of the expected in-service date may result from factors including, but not limited to, difficulties integrating the systems required for sustained operations, sustaining nitrogen supply, major equipment failure, unforeseen engineering or design problems including any repairs and/or modifications to systems, and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC).
In addition to the current construction cost estimate, the Company is also identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap. In subsequent periods, any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in the statements of income and these changes could be material.
Any extension of the in-service date beyond mid-March 2017 is currently estimated to result in additional base costs of approximately $25 million to $35 million per month, which includes maintaining necessary levels of start-up labor, materials, and

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Mississippi Power Company 2016 Annual Report

fuel, as well as operational resources required to execute start-up and commissioning activities. However, additional costs may be required for remediation of any further equipment and/or design issues identified. Any extension of the in-service date with respect to the Kemper IGCC beyond mid-March 2017 would also increase costs for the Cost Cap Exceptions, which are not subject to the $2.88 billion cost cap established by the Mississippi PSC. These costs include AFUDC, which is currently estimated to total approximately $16 million per month, as well as carrying costs and operating expenses on Kemper IGCC assets placed in service and consulting and legal fees of approximately $3 million per month.
The Company continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. The Company also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further under FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs," " – Prudence," " – Lignite Mine and CO2 Pipeline Facilities," and " – Termination of Proposed Sale of Undivided Interest" and "Income Tax Matters," these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs, net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the 15% portion of the project previously contracted to SMEPA.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, the Company is developing both a traditional rate case requesting full cost recovery of the amounts not currently in rates and a rate mitigation plan that together represent the Company's probable filing strategy. The Company also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both the Company and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on the Company's financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, the Company intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
The Company has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
Given the significant judgment involved in estimating the future costs to complete construction and start-up, the project completion date, the ultimate rate recovery for the Kemper IGCC, and the potential impact on results of operations, the Company considers these items to be critical accounting estimates. See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information.
Asset Retirement Obligations
AROs are computed as the fair value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities.
The liability for AROs primarily relates to facilities that are subject to the CCR Rule, principally ash ponds. In addition, the Company has retirement obligations related to various landfill sites, underground storage tanks, deep injection wells, water wells, substation removal, mine reclamation, and asbestos removal. The Company also has identified retirement obligations related to certain transmission and distribution facilities and certain wireless communication towers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
The cost estimates for AROs related to the disposal of CCR are based on information using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

currently anticipated useful life, the Company expects to continue to periodically update these estimates. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations – Coal Combustion Residuals" herein for additional information.
Given the significant judgment involved in estimating AROs, the Company considers the liabilities for AROs to be critical accounting estimates.
See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
Pension and Other Postretirement Benefits
The Company's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the Company believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefits costs and obligations.
Key elements in determining the Company's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on the Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. The Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to the Company's target asset allocation. For purposes of determining its liability related to the pension and other postretirement benefit plans, the Company discounts the future related cash flows using a single-point discount rate developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. For 2015 and prior years, the Company computed the interest cost component of its net periodic pension and other postretirement benefit plan expense using the same single-point discount rate. For 2016, the Company adopted a full yield curve approach for calculating the interest cost component whereby the discount rate for each year is applied to the liability for that specific year. As a result, the interest cost component of net periodic pension and other postretirement benefit plan expense decreased by approximately $4 million in 2016.
A 25 basis point change in any significant assumption (discount rate, salaries, or long-term return on plan assets) would result in a $2 million or less change in total annual benefit expense and a $19 million or less change in projected obligations.
See Note 2 to the financial statements for additional information regarding pension and other postretirement benefits.
Allowance for Funds Used During Construction
In accordance with regulatory treatment, the Company records AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently from such allowance, AFUDC increases the revenue requirement over the service life of the plant through a higher rate base and higher depreciation. The equity component of AFUDC is not included in the calculation of taxable income. The average annual AFUDC rate was 6.5%, 5.99%, and 6.91% for the years ended December 31, 2016, 2015, and 2014, respectively. The AFUDC rate is applied to CWIP consistent with jurisdictional regulatory treatment. AFUDC equity was $124 million, $110 million, and $136 million in 2016, 2015, and 2014, respectively.
Unbilled Revenues
Revenues related to the retail sale of electricity are recorded when electricity is delivered to customers. However, the determination of KWH sales to individual customers is based on the reading of their meters, which is performed on a systematic basis throughout the month. At the end of each month, amounts of electricity delivered to customers, but not yet metered and billed, are estimated. Components of the unbilled revenue estimates include total KWH territorial supply, total KWH billed, estimated total electricity lost in delivery, and customer usage. These components can fluctuate as a result of a number of factors including weather, generation patterns, power delivery volume, and other operational constraints. These factors can be unpredictable and can vary from historical trends. As a result, the overall estimate of unbilled revenues could be significantly affected, which could have a material impact on the Company's results of operations.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Contingent Obligations
The Company is subject to a number of federal and state laws and regulations as well as other factors and conditions that subject it to environmental, litigation, income tax, and other risks. See FUTURE EARNINGS POTENTIAL herein and Note 3 to the financial statements for more information regarding certain of these contingencies. The Company periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable and records a tax asset or liability if it is more likely than not that a tax position will be sustained. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of such matters could materially affect the Company's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Notes 5, 8, and 11 to the financial statements for disclosures impacted by ASU 2016-09.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
In 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements-Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern (ASU 2014-15). ASU 2014-15 defines management's responsibility to evaluate whether there is substantial doubt about an organization's ability to continue as a going concern within one year of the date the financial statements are issued and to provide related footnote disclosures including management's plans that alleviate substantial doubt. ASU 2014-15 became effective for fiscal years ending after December 15, 2016 and the Company has included the disclosures required by ASU 2014-15 in Note 6 to the financial statements under "Going Concern."
FINANCIAL CONDITION AND LIQUIDITY
Overview
Earnings for all periods presented were negatively affected by revisions to the cost estimate for the Kemper IGCC. See FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle" herein for additional information.
The Company's capital expenditures and debt maturities are expected to materially exceed operating cash flows through 2021. In addition to the Kemper IGCC, projected capital expenditures in that period include investments to maintain existing generation facilities, to add environmental modifications to existing generating units, and to expand and improve transmission and distribution facilities.
As of December 31, 2016, the Company's current liabilities exceeded current assets by approximately $371 million primarily due to $551 million in promissory notes to Southern Company which mature in December 2017, $35 million in senior notes which mature in November 2017, and $63 million in short-term debt. The Company expects the funds needed to satisfy the promissory notes to Southern Company will exceed amounts available from operating cash flows, lines of credit, and other external sources. Accordingly, the Company intends to satisfy these obligations through loans and/or equity contributions from Southern Company. Specifically, the Company has been informed by Southern Company that, in the event sufficient funds are not available from external sources, Southern Company intends to (i) extend the maturity of the $551 million in promissory notes and (ii) provide Mississippi Power with loans and/or equity contributions sufficient to fund the remaining indebtedness scheduled to mature and other cash needs over the next 12 months. Therefore, the Company's financial statement presentation contemplates continuation of the Company as a going concern as a result of Southern Company's anticipated ongoing financial support of the Company, consistent with the requirements of ASU 2014-15. See Note 1 to the financial statements under "Recently Issued Accounting Standards" for additional information regarding ASU 2014-15.
The Company's investments in the qualified pension plan increased in value as of December 31, 2016 as compared to December 31, 2015. On December 19, 2016, the Company voluntarily contributed $47 million to the qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated during 2017.
Net cash provided from operating activities totaled $229 million for 2016, an increase of $56 million as compared to 2015. The increase in cash provided from operating activities in 2016 was primarily due to repayment in 2015 of ITCs relating to the Kemper IGCC, as well as the 2015 mirror CWIP refund, partially offset by lower income tax benefits related to the Kemper IGCC in 2016 and lower fuel rates in 2016. Net cash provided from operating activities totaled $173 million for 2015, a decrease of $562 million as compared to 2014. The decrease in net cash provided from operating activities was primarily due to lower R&E tax deductions and lower incremental benefit of ITCs relating to the Kemper IGCC reducing income tax refunds, as well as a decrease in the Mirror CWIP regulatory liability due to the Mirror CWIP refund, partially offset by increases in over recovered regulatory clause revenues and customer liability associated with the Mirror CWIP refund.
Net cash used for investing activities in 2016, 2015, and 2014 totaled $697 million, $906 million, and $1.3 billion, respectively. The cash used for investing activities in 2016 was primarily due to gross property additions related to the Kemper IGCC, partially offset by the receipt of Additional DOE Grants. The cash used for investing activities in 2015 and 2014 was primarily due to gross property additions related to the Kemper IGCC and the Plant Daniel scrubber project.
Net cash provided from financing activities totaled $594 million in 2016 primarily due to long-term debt financings and capital contributions from Southern Company, partially offset by a decrease in short-term borrowings and redemptions of long-term debt.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Net cash provided from financing activities totaled $698 million in 2015 primarily due to short-term borrowings, capital contributions from Southern Company, and long-term debt financings, partially offset by redemptions of long-term debt. Net cash provided from financing activities totaled $593 million in 2014 primarily due to capital contributions from Southern Company, long-term debt financings, and the receipts of interest bearing refundable deposits previously pending, partially offset by redemptions of long-term debt.
Significant balance sheet changes as of December 31, 2016 compared to 2015 included an increase in long-term debt of $538 million. A portion of this debt was used to repay securities and notes payable resulting in a $99 million decrease in securities due within one year and a $477 million decrease in notes payable. Additionally, CWIP increased $291 million primarily due to the Kemper IGCC and the required refund of Mirror CWIP collections which reduced the related customer liability by $72 million. Other significant changes include a $383 million increase in accrued income taxes offset by unrecognized tax benefits of $368 million reclassified from long-term to current. Total common stockholder's equity increased $584 million primarily due to the receipt of capital contributions from Southern Company.
The Company's ratio of common equity to total capitalization plus short-term debt was 45.2% and 47.1% at December 31, 2016 and 2015, respectively. See Note 6 to the financial statements for additional information.
Sources of Capital
As discussed above, the Company's financial condition and its ability to obtain funds needed for normal business operations and completion of the construction and start-up of the Kemper IGCC were adversely affected for all periods presented by events relating to the Kemper IGCC. In December 2015, the Mississippi PSC approved the In-Service Asset Rate Order, which among other things, provided for retail rate recovery of an annual revenue requirement of approximately $126 million effective December 17, 2015. The amount, type, and timing of future financings will depend upon regulatory approval, prevailing market conditions, and other factors, which includes resolution of Kemper IGCC cost recovery. See "Capital Requirements and Contractual Obligations" herein and FUTURE EARNINGS POTENTIAL – "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs" herein for additional information.
As of December 31, 2016, the Company's current liabilities exceeded current assets by approximately $371 million primarily due to $551 million in promissory notes to Southern Company which mature in December 2017, $35 million in senior notes which mature in November 2017, and $63 million in short-term debt. The Company expects the funds needed to satisfy the promissory notes to Southern Company will exceed amounts available from operating cash flows, lines of credit, and other external sources. Accordingly, the Company intends to satisfy these obligations through loans and/or equity contributions from Southern Company. Specifically, the Company has been informed by Southern Company that, in the event sufficient funds are not available from external sources, Southern Company intends to (i) extend the maturity of the $551 million in promissory notes and (ii) provide Mississippi Power with loans and/or equity contributions sufficient to fund the remaining indebtedness scheduled to mature and other cash needs over the next 12 months. Therefore, the Company's financial statement presentation contemplates continuation of the Company as a going concern as a result of Southern Company's anticipated ongoing financial support of the Company, consistent with the requirements of ASU 2014-15. See Note 1 to the financial statements under "Recently Issued Accounting Standards" for additional information regarding ASU 2014-15.
The Company received $245 million of Initial DOE Grants in prior years that were used for the construction of the Kemper IGCC. An additional $25 million of grants from the DOE is expected to be received for commercial operation of the Kemper IGCC. On April 8, 2016, the Company received approximately $137 million in Additional DOE Grants for the Kemper IGCC, which are expected to be used to reduce future rate impacts for customers. In addition, see Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for information regarding legislation related to the securitization of certain costs of the Kemper IGCC.
The issuance of securities by the Company is subject to regulatory approval by the FERC. Additionally, public offerings of securities are required to be registered with the SEC under the Securities Act of 1933, as amended. The amounts of securities authorized by the FERC are continuously monitored and appropriate filings are made to ensure flexibility in raising capital. Any future financing through secured debt would also require approval by the Mississippi PSC.
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, funds of the Company are not commingled with funds of any other company in the Southern Company system.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

At December 31, 2016, the Company had approximately $224 million of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2016 were as follows:
Expires     
Executable
Term Loans
 Expires Within One Year
2017 Total Unused 
One
Year
 
Two
Years
 Term Out No Term Out
(in millions) (in millions) (in millions) (in millions)
$173
 $173
 $150
 $
 $13
 $13
 $160
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
Most of these bank credit arrangements, as well as the Company's term loan arrangements, contain covenants that limit debt levels and typically contain cross acceleration or cross default provisions to other indebtedness (including guarantee obligations) of the Company. Such cross default provisions to other indebtedness would trigger an event of default if the Company defaulted on indebtedness or guarantee obligations over a specific threshold. Such cross acceleration provisions to other indebtedness would trigger an event of default if the Company defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2016, the Company was in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowing.
Subject to applicable market conditions, the Company expects to renew or replace its bank credit arrangements as needed, prior to expiration. In connection therewith, the Company may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
A portion of the $150 million unused credit arrangements with banks is allocated to provide liquidity support to the Company's pollution control revenue bonds and commercial paper borrowings. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support as of December 31, 2016 was approximately $40 million.
Short-term borrowings are included in notes payable in the balance sheets. The Company had no short-term borrowings in 2014. Details of short-term borrowing for 2015 and 2016 were as follows:
 Short-term Debt at the End of the Period 
Short-term Debt During the Period (*)
 Amount Outstanding Weighted Average Interest Rate Average Outstanding Weighted Average Interest Rate Maximum Amount Outstanding
 (in millions)   (in millions)   (in millions)
December 31, 2016$23
 2.6% $112
 2.0% $500
December 31, 2015$500
 1.4% $372
 1.3% $515
(*)Average and maximum amounts are based upon daily balances during the twelve-month periods ended December 31.
Financing Activities
In addition to any financings that may be necessary to meet capital requirements, contractual obligations, and storm restoration costs, the Company plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Bank Term Loan and Senior Notes
In March 2016, the Company entered into an unsecured term loan agreement with a syndicate of financial institutions for an aggregate amount of $1.2 billion. The Company borrowed $900 million in March 2016 under the term loan agreement and the remaining $300 million in October 2016. The Company used the initial proceeds to repay $900 million in maturing bank loans in March 2016 and the remaining $300 million to repay at maturity the Company's Series 2011A 2.35% Senior Notes due October 15, 2016. This loan matures on April 1, 2018 and bears interest based on one-month LIBOR.
This bank loan has covenants that limit debt levels to 65% of total capitalization, as defined in the agreement. For purposes of this definition, debt excludes the long-term debt payable to affiliated trusts, other hybrid securities, and securitized debt relating to the contemplated securitization of certain costs of the Kemper IGCC. At December 31, 2016, the Company was in compliance with its debt limit.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

In addition, this bank loan contains cross acceleration provisions to other debt (including guarantee obligations) that would be triggered if the Company defaulted on debt above a specified threshold, the payment of which was then accelerated. The Company is currently in compliance with all such covenants.
Parent Company Loans and Equity Contributions
On January 28, 2016, the Company issued a promissory note for up to $275 million to Southern Company, which matures in December 2017, bearing interest based on one-month LIBOR. During 2016, the Company borrowed $100 million under this promissory note and an additional $100 million under a separate promissory note issued to Southern Company in November 2015.
On June 27, 2016, the Company received a capital contribution from Southern Company of $225 million, the proceeds of which were used to repay to Southern Company a portion of the promissory note issued in November 2015. As of December 31, 2016, the amount of outstanding promissory notes to Southern Company totaled $551 million.
Also, on December 14, 2016, the Company received a capital contribution from Southern Company of $400 million, the proceeds of which were used for general corporate purposes.
Other Obligations
In June 2016, the Company renewed a $10 million short-term note, which matures on June 30, 2017, bearing interest based on three-month LIBOR.
In September 2016, the Company entered into interest rate swaps to fix the variable interest rate on $900 million of the term loan entered into in March 2016.
In December 2016, the Company repaid $2.5 million of a $15 million short-term note, reducing the total short-term notes payable to $22.5 million.
Credit Rating Risk
At December 31, 2016, the Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that have required or could require collateral, but not accelerated payment, in the event of a credit rating change to BBB and/or Baa2 or below. These contracts are for physical electricity purchases and sales, fuel transportation and storage, energy price risk management, and transmission. At December 31, 2016, the maximum amount of potential collateral requirements under these contracts at a rating of BBB and/or Baa2 or BBB- and/or Baa3 was not material. The maximum potential collateral requirements at a rating below BBB- and/or Baa3 equaled approximately $243 million.
Included in these amounts are certain agreements that could require collateral in the event that Alabama Power or Georgia Power has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of the Company to access capital markets, and would be likely to impact the cost at which it does so.
On May 12, 2016, Fitch Ratings, Inc. (Fitch) downgraded the senior unsecured long-term debt rating of the Company to BBB+ from A- and revised the ratings outlook from negative to stable.
On January 10, 2017, S&P revised its consolidated credit rating outlook for Southern Company (including the Company) from negative to stable.
On February 6, 2017, Moody's placed the Company on a ratings review for potential downgrade. The Company's current rating for unsecured debt is Baa3.
Market Price Risk
Due to cost-based rate regulation and other various cost recovery mechanisms, the Company continues to have limited exposure to market volatility in interest rates, foreign currency exchange rates, commodity fuel prices, and prices of electricity. To manage the volatility attributable to these exposures, the Company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques that include, but are not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

To mitigate future exposure to a change in interest rates, the Company may enter into derivatives that have been designated as hedges. The weighted average interest rate on $891 million of long-term variable interest rate exposure at December 31, 2016 was 2.17%. If the Company sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would affect annualized interest expense by approximately $9 million at January 1, 2017. See Note 1 to the financial statements under "Financial Instruments" and Note 10 to the financial statements for additional information.
To mitigate residual risks relative to movements in electricity prices, the Company enters into physical fixed-price contracts for the purchase and sale of electricity through the wholesale electricity market and, to a lesser extent, financial hedge contracts for natural gas purchases. The Company continues to manage retail fuel-hedging programs implemented per the guidelines of the Mississippi PSC and wholesale fuel-hedging programs under agreements with wholesale customers. The Company had no material change in market risk exposure for the year ended December 31, 2016 when compared to the year ended December 31, 2015.
The changes in fair value of energy-related derivative contracts are substantially attributable to both the volume and the price of natural gas. For the years ended December 31, the changes in fair value of energy-related derivative contracts, the majority of which are composed of regulatory hedges, were as follows:
 
2016
Changes
 
2015
Changes
 Fair Value
 (in millions)
Contracts outstanding at the beginning of the period, assets (liabilities), net$(47) $(45)
Contracts realized or settled29
 33
Current period changes(*)
11
 (35)
Contracts outstanding at the end of the period, assets (liabilities), net$(7) $(47)
(*)Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
The net hedge volumes of energy-related derivative contracts, all of which are natural gas swaps, for the years ended December 31 were as follows:
 2016 2015
 mmBtu Volume
 (in millions)
Total hedge volume36
 32
For natural gas hedges, the weighted average swap contract cost above market prices was approximately $0.19 per mmBtu as of December 31, 2016 and $1.49 per mmBtu as of December 31, 2015. There were no options outstanding as of the reporting periods presented. The costs associated with natural gas hedges are recovered through the Company's ECMs.
At December 31, 2016 and 2015, substantially all of the Company's energy-related derivative contracts were designated as regulatory hedges and were related to the Company's fuel-hedging program. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as they are recovered through the ECM clause.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

The Company uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 9 to the financial statements for further discussion of fair value measurements. The maturities of the energy-related derivative contracts, which are all Level 2 of the fair value hierarchy, at December 31, 2016 were as follows:
 
Fair Value Measurements
December 31, 2016
 Total Maturity
 Fair Value Year 1 Years 2&3 
 (in millions)
Level 1$
 $
 $
Level 2(7) (4) (3)
Level 3
 
 
Fair value of contracts outstanding at end of period$(7) $(4) $(3)
The Company is exposed to market price risk in the event of nonperformance by counterparties to the energy-related derivative contracts. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. Therefore, the Company does not anticipate market risk exposure from nonperformance by the counterparties. For additional information, see Note 1 to the financial statements under "Financial Instruments" and Note 10 to the financial statements.
Capital Requirements and Contractual Obligations
Approximately $586 million will be required through December 31, 2017 to fund maturities of long-term debt, and $23 million will be required to fund maturities of short-term debt. See "Sources of Capital" herein for additional information.
The construction program of the Company is currently estimated to total $517 million for 2017, $241 million for 2018, $274 million for 2019, $305 million for 2020, and $230 million for 2021, which includes completion of the Kemper IGCC and post-in-service costs. Expenditures related to completion of the Kemper IGCC are currently estimated to be $254 million for 2017. These estimated program amounts also include capital expenditures covered under long-term service agreements. Estimated capital expenditures to comply with environmental statutes and regulations included in these program amounts are $11 million, $5 million, $24 million, $29 million, and $58 million for 2017, 2018, 2019, 2020, and 2021, respectively. These estimated environmental expenditures do not include potential compliance costs that may arise from the EPA's final rules and guidelines or future state plans that would limit CO2 emissions from existing, new, modified, or reconstructed fossil-fuel-fired electric generating units. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" and "– Global Climate Issues" and – "Integrated Coal Gasification Combined Cycle" herein for additional information.
The Company also anticipates costs associated with closure and monitoring of ash ponds in accordance with the CCR Rule, which are reflected in the Company's ARO liabilities. These costs, which could change as the Company continues to refine its assumptions underlying the cost estimates and evaluate the method and timing of compliance activities, are estimated to be $32 million, $11 million, $6 million, $6 million, and $9 million for the years 2017, 2018, 2019, 2020, and 2021, respectively. See Note 1 to the financial statements under "Asset Retirement Obligations and Other Costs of Removal" for additional information.
The construction program is subject to periodic review and revision, and actual construction costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in load projections; storm impacts; changes in environmental statutes and regulations; the outcome of any legal challenges to the environmental rules; changes in generating plants, including unit retirements and replacements and adding or changing fuel sources at existing units, to meet regulatory requirements; changes in FERC rules and regulations; Mississippi PSC approvals; changes in the expected environmental compliance program; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; and the cost of capital.
In addition, the construction program includes the development and construction of the Kemper IGCC, a first-of-a-kind technology, which may result in revised estimates during construction. The ability to control costs and avoid cost overruns during the development and construction of new facilities is subject to a number of factors, including, but not limited to, changes in labor costs and productivity, adverse weather conditions, shortages and inconsistent quality of equipment, materials, and labor, sustaining nitrogen supply, contractor or supplier delay, non-performance under construction, operating, or other agreements, operational readiness, including specialized operator training and required site safety programs, unforeseen engineering or design

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

problems, start-up activities (including major equipment failure and system integration), and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC).
See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information and further risks related to the estimated schedule and costs and rate recovery for the Kemper IGCC.
In addition, as discussed in Note 2 to the financial statements, the Company provides postretirement benefits to substantially all employees and funds trusts to the extent required by the FERC.
Other funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, derivative obligations, preferred stock dividends, unrecognized tax benefits, pension and other post-retirement benefit plans, leases, and other purchase commitments are detailed in the contractual obligations table that follows. See Notes 1, 2, 5, 6, 7, and 10 to the financial statements for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Contractual Obligations
Contractual obligations at December 31, 2016 were as follows:
 2017 2018-2019 2020-2021 
After
2021
 Total
 (in millions)
Long-term debt(a) —
         
Principal$626
 $1,325
 $270
 $723
 $2,944
Interest98
 141
 100
 598
 937
Preferred stock dividends(b)
2
 3
 3
 
 8
Financial derivative obligations(c)
6
 4
 
 
 10
Unrecognized tax benefits(d)
465
 
 
 
 465
Operating leases (e)
2
 1
 1
 
 4
Capital leases(f)
7
 13
 13
 76
 109
Purchase commitments —         
Capital(g)
480
 508
 506
 
 1,494
Fuel(h)
290
 320
 184
 251
 1,045
Long-term service agreements(i)
15
 75
 48
 244
 382
Pension and other postretirement benefits plans(j)
7
 15
 
 
 22
Total$1,998
 $2,405
 $1,125
 $1,892
 $7,420
(a)
All amounts are reflected based on final maturity dates except for amounts related to certain pollution control revenue bonds. Long-term debt principal for 2017 includes $40 million of pollution control revenue bonds that are classified on the balance sheet at December 31, 2016 as short-term since they are variable rate demand obligations that are supported by short-term credit facilities; however, the final maturity date is in 2028. The Company plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates as of January 1, 2017, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk. Long-term debt excludes capital lease amounts (shown separately).
(b)Preferred stock does not mature; therefore, amounts are provided for the next five years only.
(c)For additional information, see Notes 1 and 10 to the financial statements.
(d)See Note 5 to the financial statements under "Unrecognized Tax Benefits" for additional information.
(e)See Note 7 to the financial statements for additional information.
(f)Capital lease related to a 20-year nitrogen supply agreement for the Kemper IGCC. See Note 6 to the financial statements for additional information.
(g)The Company provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. At December 31, 2016, significant purchase commitments were outstanding in connection with the construction program. These amounts exclude capital expenditures covered under long-term service agreements, which are reflected separately. See FUTURE EARNINGS POTENTIAL – "Environmental Matters – Environmental Statutes and Regulations" herein for additional information. See Note 3 to the financial statements under "Integrated Coal Gasification Combined Cycle" for additional information.
(h)
Includes commitments to purchase coal and natural gas, as well as the related transportation and storage. In most cases, these contracts contain provisions for price escalation, minimum purchase levels, and other financial commitments. Natural gas purchase commitments are based on various indices at the time of delivery. Amounts reflected for natural gas purchase commitments have been estimated based on the New York Mercantile Exchange future prices at December 31, 2016.
(i)Long-term service agreements include price escalation based on inflation indices.
(j)The Company forecasts contributions to the pension and other postretirement benefit plans over a three-year period. The Company anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from the Company's corporate assets. See Note 2 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from the Company's corporate assets.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

Cautionary Statement Regarding Forward-Looking Statements
The Company's 2016 Annual Report contains forward-looking statements. Forward-looking statements include, among other things, statements concerning retail rates, customer and sales growth, economic conditions, fuel and environmental cost recovery and other rate actions, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plan and postretirement benefit plans contributions, financing activities, completion of construction projects, filings with state and federal regulatory authorities, impact of the PATH Act, federal income tax benefits, estimated sales and purchases under power sale and purchase agreements, storm damage cost recovery and repairs, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impact of recent and future federal and state regulatory changes, including environmental laws regulating emissions, discharges, and disposal to air, water, and land, and also changes in tax and other laws and regulations to which the Company is subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
the effects, extent, and timing of the entry of additional competition in the markets in which the Company operates;
variations in demand for electricity, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources such as self-generation and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of fuels;
effects of inflation;
the ability to control costs and avoid cost overruns during the development, construction, and operation of facilities, which include the development and construction of generating facilities with designs that have not been finalized or previously constructed, including changes in labor costs and productivity, adverse weather conditions, shortages and inconsistent quality of equipment, materials, and labor, sustaining nitrogen supply, contractor or supplier delay, non-performance under operating or other agreements, operational readiness, including specialized operator training and required site safety programs, unforeseen engineering or design problems, start-up activities (including major equipment failure and system integration), and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC);
the ability to construct facilities in accordance with the requirements of permits and licenses, to satisfy any environmental performance standards and the requirements of tax credits and other incentives, and to integrate facilities into the Southern Company system upon completion of construction;
investment performance of the Company's employee and retiree benefit plans;
advances in technology;
state and federal rate regulations and the impact of pending and future rate cases and negotiations, including rate actions relating to fuel and other cost recovery mechanisms;
the ability to successfully operate generating, transmission, and distribution facilities and the successful performance of necessary corporate functions;
actions related to cost recovery for the Kemper IGCC, including the ultimate impact of the 2015 decision of the Mississippi Supreme Court, the Mississippi PSC's December 2015 rate order, and related legal or regulatory proceedings, Mississippi PSC review of the prudence of Kemper IGCC costs and approval of further permanent rate recovery plans, actions relating to proposed securitization, satisfaction of requirements to utilize grants, and the ultimate impact of the termination of the proposed sale of an interest in the Kemper IGCC to SMEPA;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to the Company;
the ability of counterparties of the Company to make payments as and when due and to perform as required;

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Mississippi Power Company 2016 Annual Report

the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Company's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;
changes in the Company's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general;
the ability of the Company to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;
the direct or indirect effects on the Company's business resulting from incidents affecting the U.S. electric grid or operation of generating resources;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (including the Form 10-K) filed by the Company from time to time with the SEC.
The Company expressly disclaims any obligation to update any forward-looking statements.


STATEMENTS OF OPERATIONS
For the Years Ended December 31, 20162019, 20152018, and 20142017
Mississippi Power Company 20162019 Annual Report


 2016 2015 2014
 (in millions)
Operating Revenues:     
Retail revenues$859
 $776
 $795
Wholesale revenues, non-affiliates261
 270
 323
Wholesale revenues, affiliates26
 76
 107
Other revenues17
 16
 18
Total operating revenues1,163
 1,138
 1,243
Operating Expenses:     
Fuel343
 443
 574
Purchased power, non-affiliates5
 5
 18
Purchased power, affiliates29
 7
 25
Other operations and maintenance312
 274
 271
Depreciation and amortization132
 123
 97
Taxes other than income taxes109
 94
 79
Estimated loss on Kemper IGCC428
 365
 868
Total operating expenses1,358
 1,311
 1,932
Operating Loss(195) (173) (689)
Other Income and (Expense):     
Allowance for equity funds used during construction124
 110
 136
Interest expense, net of amounts capitalized(74) (7) (45)
Other income (expense), net(7) (8) (14)
Total other income and (expense)43
 95
 77
Loss Before Income Taxes(152) (78) (612)
Income taxes (benefit)(104) (72) (285)
Net Loss(48) (6) (327)
Dividends on Preferred Stock2
 2
 2
Net Loss After Dividends on Preferred Stock$(50) $(8) $(329)
The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 2016, 2015, and 2014
Mississippi Power Company 2016 Annual Report
 2016 2015 2014
 (in millions)
Net Loss$(48) $(6) $(327)
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $1, $-, and $-,
respectively
1
 
 
Reclassification adjustment for amounts included in net income,
net of tax of $1, $1, and $1, respectively
1
 1
 1
Total other comprehensive income (loss)2
 1
 1
Comprehensive Loss$(46) $(5) $(326)
 2019 2018 2017
 (in millions)
Operating Revenues:     
Retail revenues$877
 $889
 $854
Wholesale revenues, non-affiliates237
 263
 259
Wholesale revenues, affiliates132
 91
 56
Other revenues18
 22
 18
Total operating revenues1,264
 1,265
 1,187
Operating Expenses:     
Fuel407
 405
 395
Purchased power20
 41
 25
Other operations and maintenance283
 313
 291
Depreciation and amortization192
 169
 161
Taxes other than income taxes113
 107
 104
Estimated loss on Kemper IGCC24
 37
 3,362
Total operating expenses1,039
 1,072
 4,338
Operating Income (Loss)225
 193
 (3,151)
Other Income and (Expense):     
Allowance for equity funds used during construction1
 
 72
Interest expense, net of amounts capitalized(69) (76) (42)
Other income (expense), net12
 17
 1
Total other income and (expense)(56) (59) 31
Earnings (Loss) Before Income Taxes169
 134
 (3,120)
Income taxes (benefit)30
 (102) (532)
Net Income (Loss)139
 236
 (2,588)
Dividends on Preferred Stock
 1
 2
Net Income (Loss) After Dividends on Preferred Stock$139
 $235
 $(2,590)
The accompanying notes are an integral part of these financial statements.



STATEMENTS OF CASH FLOWSCOMPREHENSIVE INCOME (LOSS)
For the Years Ended December 31, 20162019, 20152018, and 20142017
Mississippi Power Company 20162019 Annual Report
 2016 2015 2014
 (in millions)
Operating Activities:     
Net loss$(48) $(6) $(327)
Adjustments to reconcile net loss to net cash provided from operating activities —     
Depreciation and amortization, total157
 126
 104
Deferred income taxes(67) 777
 145
Investment tax credits
 (210) (38)
Allowance for equity funds used during construction(124) (110) (136)
Pension and postretirement funding(47) 
 (33)
Regulatory assets associated with Kemper IGCC(12) (61) (72)
Estimated loss on Kemper IGCC428
 365
 868
Income taxes receivable, non-current
 (544) 
Other, net(20) 8
 22
Changes in certain current assets and liabilities —     
-Receivables13
 28
 (22)
-Prepaid income taxes39
 (35) (50)
-Other current assets(8) (18) (6)
-Accounts payable(14) (34) 33
-Accrued taxes14
 (11) 39
-Over recovered regulatory clause revenues(45) 96
 (18)
-Mirror CWIP
 (271) 180
-Customer liability associated with Kemper refunds(73) 73
 
-Other current liabilities36
 
 46
Net cash provided from operating activities229
 173
 735
Investing Activities:     
Property additions(798) (857) (1,257)
Investment in restricted cash
 
 (11)
Distribution of restricted cash
 
 11
Construction payables(26) (9) (50)
Government grant proceeds137
 
 
Other investing activities(10) (40) (33)
Net cash used for investing activities(697) (906) (1,340)
Financing Activities:     
Proceeds —     
Capital contributions from parent company627
 277
 451
Bonds — Other
 
 23
Interest-bearing refundable deposit
 
 125
Long-term debt issuance to parent company200
 275
 220
Other long-term debt1,200
 
 250
Short-term borrowings
 505
 
Redemptions —     
Short-term borrowings(478) (5) 
Long-term debt to parent company(225) 
 (220)
Bonds — Other
 
 (34)
Senior notes(300) 
 
Other long-term debt(425) (350) 
Return of capital
 
 (220)
Other financing activities(5) (4) (2)
Net cash provided from financing activities594
 698
 593
Net Change in Cash and Cash Equivalents126
 (35) (12)
Cash and Cash Equivalents at Beginning of Year98
 133
 145
Cash and Cash Equivalents at End of Year$224
 $98
 $133
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $49, $66, and $69 capitalized, respectively)$50
 $45
 $7
Income taxes (net of refunds)(97) (33) (379)
Noncash transactions —     
  Accrued property additions at year-end78
 105
 114
Issuance of promissory note to parent related to repayment of
   interest-bearing refundable deposits and accrued interest

 301
 
The accompanying notes are an integral part of these financial statements. 

BALANCE SHEETS
At December 31, 2016 and 2015
Mississippi Power Company 2016 Annual Report


Assets2016 2015
 (in millions)
Current Assets:   
Cash and cash equivalents$224
 $98
Receivables —   
Customer accounts receivable29
 26
Unbilled revenues42
 36
Income taxes receivable, current544
 20
Other accounts and notes receivable14
 10
Affiliated15
 20
Fossil fuel stock100
 104
Materials and supplies, current76
 75
Other regulatory assets, current115
 95
Prepaid income taxes
 39
Other current assets8
 8
Total current assets1,167
 531
Property, Plant, and Equipment:   
In service4,865
 4,886
Less accumulated provision for depreciation1,289
 1,262
Plant in service, net of depreciation3,576
 3,624
Construction work in progress2,545
 2,254
Total property, plant, and equipment6,121
 5,878
Other Property and Investments12
 11
Deferred Charges and Other Assets:   
Deferred charges related to income taxes361
 290
Other regulatory assets, deferred518
 525
Income taxes receivable, non-current
 544
Other deferred charges and assets56
 61
Total deferred charges and other assets935
 1,420
Total Assets$8,235
 $7,840
 2019 2018 2017
 (in millions)
Net Income (Loss)$139
 $236
 $(2,588)
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $-, $(1), and $(1), respectively
 (1) (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $1, respectively
1
 1
 1
Total other comprehensive income (loss)1
 
 
Comprehensive Income (Loss)$140
 $236
 $(2,588)
The accompanying notes are an integral part of these financial statements.




BALANCE SHEETSSTATEMENTS OF CASH FLOWS
At For the Years Ended December 31, 20162019, 2018, and 20152017
Mississippi Power Company 20162019 Annual Report

 2019 2018 2017
 (in millions)
Operating Activities:     
Net income (loss)$139
 $236
 $(2,588)
Adjustments to reconcile net income (loss)
to net cash provided from operating activities —
     
Depreciation and amortization, total197
 177
 198
Deferred income taxes37
 475
 (727)
Allowance for equity funds used during construction(1) 
 (72)
Pension and postretirement funding(54) 
 
Settlement of asset retirement obligations(35) (35) (23)
Estimated loss on Kemper IGCC15
 33
 3,179
Other, net21
 18
 (8)
Changes in certain current assets and liabilities —     
-Receivables6
 (19) 540
-Fossil fuel stock(6) (3) 24
-Prepaid income taxes12
 (12) 
-Other current assets(2) (7) (13)
-Accounts payable3
 15
 (3)
-Accrued interest
 (1) (29)
-Accrued taxes11
 (46) 80
-Over recovered regulatory clause revenues16
 14
 (51)
-Other current liabilities(20) (41) (4)
Net cash provided from operating activities339
 804
 503
Investing Activities:     
Property additions(202) (188) (429)
Construction payables(1) 4
 (47)
Payments pursuant to LTSAs(23) (29) (10)
Other investing activities(37) (19) (18)
Net cash used for investing activities(263) (232) (504)
Financing Activities:     
Decrease in notes payable, net
 (4) (18)
Proceeds —     
Capital contributions from parent company51
 15
 1,002
Senior notes
 600
 
Long-term debt issuance to parent company
 
 40
Short-term borrowings
 300
 109
Pollution control revenue bonds43
 
 
Redemptions —     
Preferred stock
 (33) 
Pollution control revenue bonds
 (43) 
Short-term borrowings
 (300) (109)
Long-term debt to parent company
 
 (591)
Capital leases
 
 (71)
Senior notes(25) (155) (35)
Other long-term debt
 (900) (300)
Return of capital to parent company(150) 
 
Other financing activities(2) (7) (2)
Net cash provided from (used for) financing activities(83) (527) 25
Net Change in Cash, Cash Equivalents, and Restricted Cash(7) 45
 24
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year293
 248
 224
Cash, Cash Equivalents, and Restricted Cash at End of Year$286
 $293
 $248
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $(1), $-, and $29 capitalized, respectively)$71
 $80
 $65
Income taxes (net of refunds)(27) (525) (424)
Noncash transactions — Accrued property additions at year-end35
 35
 32
The accompanying notes are an integral part of these financial statements. 

BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Liabilities and Stockholder's Equity2016 2015
 (in millions)
Current Liabilities:   
Securities due within one year —   
Parent$551
 $
Other78
 728
Notes payable23
 500
Accounts payable —   
Affiliated62
 85
Other135
 135
Customer deposits16
 16
Accrued taxes99
 85
Unrecognized tax benefits, current383
 
Accrued interest46
 18
Accrued compensation42
 37
Asset retirement obligations, current32
 22
Over recovered regulatory clause liabilities51
 96
Customer liability associated with Kemper refunds1
 73
Other current liabilities19
 41
Total current liabilities1,538
 1,836
Long-Term Debt (See accompanying statements)
2,424
 1,886
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes756
 762
Employee benefit obligations115
 153
Asset retirement obligations, deferred146
 154
Unrecognized tax benefits, deferred
 368
Other cost of removal obligations170
 165
Other regulatory liabilities, deferred84
 79
Other deferred credits and liabilities26
 45
Total deferred credits and other liabilities1,297
 1,726
Total Liabilities5,259
 5,448
Cumulative Redeemable Preferred Stock (See accompanying statements)
33
 33
Common Stockholder's Equity (See accompanying statements)
2,943
 2,359
Total Liabilities and Stockholder's Equity$8,235
 $7,840
Commitments and Contingent Matters (See notes)

 
Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$286
 $293
Receivables —   
Customer accounts receivable35
 34
Unbilled revenues39
 41
Affiliated27
 21
Other accounts and notes receivable26
 31
Fossil fuel stock26
 20
Materials and supplies61
 53
Other regulatory assets99
 116
Prepaid income taxes
 12
Other current assets10
 7
Total current assets609
 628
Property, Plant, and Equipment:   
In service4,857
 4,900
Less: Accumulated provision for depreciation1,463
 1,429
Plant in service, net of depreciation3,394
 3,471
Construction work in progress126
 103
Total property, plant, and equipment3,520
 3,574
Other Property and Investments131
 24
Deferred Charges and Other Assets:   
Deferred charges related to income taxes32
 33
Regulatory assets – asset retirement obligations210
 143
Other regulatory assets, deferred360
 331
Accumulated deferred income taxes139
 150
Other deferred charges and assets34
 3
Total deferred charges and other assets775
 660
Total Assets$5,035
 $4,886
The accompanying notes are an integral part of these financial statements.


BALANCE SHEETS
At December 31, 2019 and 2018
Mississippi Power Company 2019 Annual Report

Liabilities and Stockholder's Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$281
 $40
Accounts payable —   
Affiliated76
 60
Other75
 90
Accrued taxes105
 95
Accrued interest15
 15
Accrued compensation35
 38
Accrued plant closure costs15
 29
Asset retirement obligations33
 34
Other regulatory liabilities21
 12
Over recovered regulatory clause liabilities29
 14
Other current liabilities49
 28
Total current liabilities734
 455
Long-Term Debt (See accompanying statements)
1,308
 1,539
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes424
 378
Deferred credits related to income taxes352
 382
Employee benefit obligations99
 115
Asset retirement obligations, deferred157
 126
Other cost of removal obligations189
 185
Other regulatory liabilities, deferred76
 81
Other deferred credits and liabilities44
 16
Total deferred credits and other liabilities1,341
 1,283
Total Liabilities3,383
 3,277
Common Stockholder's Equity (See accompanying statements)
1,652
 1,609
Total Liabilities and Stockholder's Equity$5,035
 $4,886
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these financial statements.
 


STATEMENTS OF CAPITALIZATION
At December 31, 20162019 and 20152018
Mississippi Power Company 20162019 Annual Report

 2016 2015 2016 2015
 (in millions) (percent of total)
Long-Term Debt:       
Long-term notes payable —       
2.35% due 2016$
 $300
    
5.60% due 201735
 35
    
5.55% due 2019125
 125
    
1.63% to 5.40% due 2035-2042680
 680
    
Adjustable rates (1.84% to 1.90% at 1/1/16) due 2016
 425
    
Adjustable rates (2.15% to 2.24% at 1/1/17) due 20181,200
 
    
Total long-term notes payable2,040
 1,565
    
Other long-term debt —       
Pollution control revenue bonds —       
5.15% due 202843
 43
    
Variable rates (0.83% to 0.87% at 1/1/17) due 201740
 40
    
Plant Daniel revenue bonds (7.13%) due 2021270
 270
    
Long-term debt payable to parent company (2.27%) due 2017551
 576
    
Total other long-term debt904
 929
    
Capitalized lease obligations74
 77
    
Unamortized debt premium45
 53
    
Unamortized debt discount(2) (2)    
Unamortized debt issuance expense(8) (8)    
Total long-term debt (annual interest requirement — $102 million)3,053
 2,614
    
Less amount due within one year629
 728
    
Long-term debt excluding amount due within one year2,424
 1,886
 44.9% 44.1%
Cumulative Redeemable Preferred Stock:       
$100 par value —       
Authorized — 1,244,139 shares       
Outstanding — 334,210 shares       
4.40% to 5.25% (annual dividend requirement — $2 million)33
 33
 0.6
 0.8
Common Stockholder's Equity:       
Common stock, without par value —       
Authorized — 1,130,000 shares
 
    
Outstanding — 1,121,000 shares38
 38
    
Paid-in capital3,525
 2,893
    
Accumulated deficit(616) (566)    
Accumulated other comprehensive loss(4) (6)    
Total common stockholder's equity2,943
 2,359
 54.5
 55.1
Total Capitalization$5,400
 $4,278
 100.0% 100.0%
 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Due 2028-20424.16%$950
$950
  
Adjustable rate due 20202.59%275
300
  
Total long-term notes payable 1,225
1,250
  
Other long-term debt —     
Pollution control revenue bonds —     
Due 20283.20%43

  
Variable rate due 20201.80%7
40
  
Variable rate due 2025-20281.80%33

  
Plant Daniel revenue bonds due 20217.13%270
270
  
Total other long-term debt 353
310
  
Unamortized debt premium (discount), net 19
27
  
Unamortized debt issuance expense (8)(8)  
Total long-term debt 1,589
1,579
  
Less amount due within one year 281
40
  
Long-term debt excluding amount due within one year 1,308
1,539
44.2%48.9%
Common Stockholder's Equity:     
Common stock, without par value —     
Authorized — 1,130,000 shares 

  
Outstanding — 1,121,000 shares 38
38
  
Paid-in capital 4,449
4,546
  
Accumulated deficit (2,832)(2,971)  
Accumulated other comprehensive loss (3)(4)  
Total common stockholder's equity 1,652
1,609
55.8
51.1
Total Capitalization $2,960
$3,148
100.0%100.0%
The accompanying notes are an integral part of these financial statements.
 


STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
For the Years Ended December 31, 20162019, 20152018, and 20142017
Mississippi Power Company 20162019 Annual Report

Number of Common Shares Issued 
Common
Stock
 Paid-In Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss) TotalNumber of Common Shares Issued 
Common
Stock
 Paid-In Capital Retained Earnings (Accumulated Deficit) Accumulated Other Comprehensive Income (Loss) Total
(in millions)(in millions)
Balance at December 31, 20131
 $38
 $2,377
 $(230) $(8) $2,177
Balance at December 31, 20161
 $38
 $3,525
 $(616) $(4) $2,943
Net loss after dividends on preferred stock
 
 
 (329) 
 (329)
 
 
 (2,590) 
 (2,590)
Capital contributions from parent company
 
 235
 
 
 235

 
 1,004
 
 
 1,004
Other comprehensive income (loss)
 
 
 
 1
 1
Balance at December 31, 20141
 38
 2,612
 (559) (7) 2,084
Net loss after dividends on preferred stock
 
 
 (8) 
 (8)
Other
 
 
 1
 
 1
Balance at December 31, 20171
 38
 4,529
 (3,205) (4) 1,358
Net income after dividends on preferred stock
 
 
 235
 
 235
Capital contributions from parent company
 
 281
 
 
 281

 
 17
 
 
 17
Other comprehensive income (loss)
 
 
 
 1
 1
Other
 
 
 1
 
 1

 
 
 (1) 
 (1)
Balance at December 31, 20151
 38
 2,893
 (566) (6) 2,359
Net loss after dividends on preferred stock
 
 
 (50) 
 (50)
Balance at December 31, 20181
 38
 4,546
 (2,971) (4) 1,609
Net income after dividends on preferred stock
 
 
 139
 
 139
Return of capital to parent company
 
 (150) 
 
 (150)
Capital contributions from parent company
 
 632
 
 
 632

 
 53
 
 
 53
Other comprehensive income (loss)
 
 
 
 2
 2
Balance at December 31, 20161
 $38
 $3,525
 $(616) $(4) $2,943
Other comprehensive income
 
 
 
 1
 1
Balance at December 31, 20191
 $38
 $4,449
 $(2,832) $(3) $1,652
The accompanying notes are an integral part of these financial statements.
 



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Power as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of Southern Power's management. Our responsibility is to express an opinion on Southern Power's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Power in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Power is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Power's internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Power's auditor since 2002.

CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Revenues:     
Wholesale revenues, non-affiliates$1,528
 $1,757
 $1,671
Wholesale revenues, affiliates398
 435
 392
Other revenues12
 13
 12
Total operating revenues1,938
 2,205
 2,075
Operating Expenses:     
Fuel577
 699
 621
Purchased power108
 176
 149
Other operations and maintenance359
 395
 386
Depreciation and amortization479
 493
 503
Taxes other than income taxes40
 46
 48
Asset impairment3
 156
 
Gain on dispositions, net(23) (2) 
Total operating expenses1,543
 1,963
 1,707
Operating Income395
 242
 368
Other Income and (Expense):     
Interest expense, net of amounts capitalized(169) (183) (191)
Other income (expense), net47
 23
 1
Total other income and (expense)(122) (160) (190)
Earnings Before Income Taxes273
 82
 178
Income taxes (benefit)(56) (164) (939)
Net Income329
 246
 1,117
Net income (loss) attributable to noncontrolling interests(10) 59
 46
Net Income Attributable to Southern Power$339
 $187
 $1,071
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Net Income$329
 $246
 $1,117
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(22), $(17), and $39, respectively(66) (51) 63
Reclassification adjustment for amounts included in net income,
net of tax of $14, $19, and $(46), respectively
41
 58
 (73)
Pension and other postretirement benefit plans:     
Benefit plan net gain (loss), net of tax of $(6), $2, and $-, respectively(17) 5
 
Reclassification adjustment for amounts included in net income,
net of tax of $-, $-, and $-, respectively

 2
 
Total other comprehensive income (loss)(42) 14
 (10)
Comprehensive income (loss) attributable to noncontrolling interests(10) 59
 46
Comprehensive Income Attributable to Southern Power$297
 $201
 $1,061
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 2019 2018 2017
 (in millions)
Operating Activities:     
Net income$329
 $246
 $1,117
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total505
 524
 536
Deferred income taxes(74) (244) (263)
Utilization of federal investment tax credits734
 5
 
Amortization of investment tax credits(151) (58) (57)
Accrued income taxes, non-current
 (14) 14
Income taxes receivable, non-current25
 42
 (61)
Pension and postretirement funding(24) 
 
Asset impairment3
 156
 
Other, net(33) 7
 (13)
Changes in certain current assets and liabilities —     
-Receivables72
 (20) (60)
-Prepaid income taxes39
 25
 24
-Other current assets(8) (26) (28)
-Accrued taxes6
 7
 (55)
-Other current liabilities(38) (19) 1
Net cash provided from operating activities1,385
 631
 1,155
Investing Activities:     
Business acquisitions. net of cash acquired(50) (65) (1,016)
Property additions(489) (315) (268)
Change in construction payables7
 (6) (153)
Investment in unconsolidated subsidiaries(116) 
 
Proceeds from dispositions and asset sales572
 203
 
Payments pursuant to LTSAs and for equipment not yet received(104) (75) (203)
Other investing activities13
 31
 15
Net cash used for investing activities(167) (227) (1,625)
Financing Activities:     
Increase (decrease) in notes payable, net449
 (105) (104)
Proceeds —     
Short-term borrowings100
 200
 
Capital contributions from parent company64
 2
 
Senior notes
 
 525
Other long-term debt
 
 43
Redemptions —     
Senior notes(600) (350) (500)
Other long-term debt
 (420) (18)
Short-term borrowings(100) (100) 
Return of capital to parent company(755) (1,650) 
Distributions to noncontrolling interests(256) (153) (119)
Capital contributions from noncontrolling interests196
 2,551
 80
Purchase of membership interests from noncontrolling interests
 
 (59)
Payment of common stock dividends(206) (312) (317)
Other financing activities(12) (26) (33)
Net cash used for financing activities(1,120) (363) (502)
Net Change in Cash, Cash Equivalents, and Restricted Cash98
 41
 (972)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year181
 140
 1,112
Cash, Cash Equivalents, and Restricted Cash at End of Year$279
 $181
 $140
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $15, $17, and $11 capitalized, respectively)$167
 $173
 $189
Income taxes (net of refunds and investment tax credits)(664) 79
 (487)
Noncash transactions — Accrued property additions at year-end57
 31
 32
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Assets2019 2018
 (in millions)
Current Assets:   
Cash and cash equivalents$279
 $181
Receivables —   
Customer accounts receivable107
 111
Affiliated30
 55
Other73
 116
Materials and supplies191
 220
Prepaid income taxes36
 25
Other current assets43
 37
Total current assets759
 745
Property, Plant, and Equipment:   
In service13,270
 13,271
Less: Accumulated provision for depreciation2,464
 2,171
Plant in service, net of depreciation10,806
 11,100
Construction work in progress515
 430
Total property, plant, and equipment11,321
 11,530
Other Property and Investments:   
Intangible assets, net of amortization of $69 and $61
at December 31, 2019 and December 31, 2018, respectively
322
 345
Equity investments in unconsolidated subsidiaries28
 
Total other property and investments350
 345
Deferred Charges and Other Assets:   
Operating lease right-of-use assets, net of amortization369
 
Prepaid LTSAs128
 98
Accumulated deferred income taxes551
 1,186
Income taxes receivable, non-current5
 30
Assets held for sale601
 576
Other deferred charges and assets216
 373
Total deferred charges and other assets1,870
 2,263
Total Assets$14,300
 $14,883
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Power Company and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholders' Equity2019 2018
 (in millions)
Current Liabilities:   
Securities due within one year$824
 $599
Notes payable549
 100
Accounts payable —   
Affiliated56
 92
Other85
 77
Accrued taxes26
 6
Accrued interest32
 36
Other current liabilities132
 121
Total current liabilities1,704
 1,031
Long-Term Debt:   
Senior notes —   
2.375% due 2020
 300
2.50% due 2021300
 300
1.00% due 2022674
 687
2.75% due 2023290
 290
Weighted average interest rate 4.12% at 12/31/19 due 2025-20462,337
 2,348
Other long-term debt —   
Variable rate (3.34% at 12/31/18) due 2020
 525
Unamortized debt premium (discount), net(8) (9)
Unamortized debt issuance expense(19) (23)
Total long-term debt3,574
 4,418
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes115
 105
Accumulated deferred ITCs1,731
 1,832
Operating lease obligations376
 
Other deferred credits and liabilities178
 213
Total deferred credits and other liabilities2,400
 2,150
Total Liabilities7,678
 7,599
Common Stockholder's Equity:   
Common stock, par value $0.01 per share —   
Authorized — 1,000,000 shares   
Outstanding — 1,000 shares
 
Paid-in capital909
 1,600
Retained earnings1,485
 1,352
Accumulated other comprehensive income (loss)(26) 16
Total common stockholder's equity2,368
 2,968
Noncontrolling Interests4,254
 4,316
Total Stockholders' Equity6,622
 7,284
Total Liabilities and Stockholders' Equity$14,300
 $14,883
Commitments and Contingent Matters (See notes)

 

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2019, 2018, and 2017
Southern Power Company and Subsidiary Companies 2019 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings
 Accumulated Other Comprehensive Income Total Common Stockholder's Equity 
Noncontrolling Interests(a)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $3,671
 $724
 $35
 $4,430
 $1,245
 $5,675
Net income attributable
   to Southern Power

 
 
 1,071
 
 1,071
 
 1,071
Capital contributions to
   parent company, net

 
 (2) 
 
 (2) 
 (2)
Other comprehensive income (loss)
 
 
 
 (10) (10) 
 (10)
Cash dividends on common
   stock

 
 
 (317) 
 (317) 
 (317)
Other comprehensive income
transfer from SCS
(b)

 
 
 
 (27) (27) 
 (27)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 79
 79
Distributions to noncontrolling
   interests

 
 
 
 
 
 (122) (122)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 44
 44
Reclassification from redeemable
noncontrolling interests

 
 
 
 
 
 114
 114
Other
 
 (7) 
 
 (7) 
 (7)
Balance at December 31, 2017
 
 3,662
 1,478
 (2) 5,138
 1,360
 6,498
Net income attributable
   to Southern Power

 
 
 187
 
 187
 
 187
Return of capital to parent
   company

 
 (1,650) 
 
 (1,650) 
 (1,650)
Capital contributions from parent
   company

 
 2
 
 
 2
 
 2
Other comprehensive income
 
 
 
 14
 14
 
 14
Cash dividends on common
   stock

 
 
 (312) 
 (312) 
 (312)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 1,372
 1,372
Distributions to noncontrolling
   interests

 
 
 
 
 
 (164) (164)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 59
 59
Sale of noncontrolling interests(c)

 
 (417) 
 
 (417) 1,690
 1,273
Other
 
 3
 (1) 4
 6
 (1) 5
Balance at December 31, 2018
 
 1,600
 1,352
 16
 2,968
 4,316
 7,284
Net income attributable
   to Southern Power

 
 
 339
 
 339
 
 339
Return of capital to parent
   company

 
 (755) 
 
 (755) 
 (755)
Capital contributions from parent
   company

 
 64
 
 
 64
 
 64
Other comprehensive income (loss)
 
 
 
 (42) (42) 
 (42)
Cash dividends on common
   stock

 
 
 (206) 
 (206) 
 (206)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 276
 276
Distributions to noncontrolling
   interests

 
 
 
 
 
 (327) (327)
Net income (loss) attributable to
   noncontrolling interests

 
 
 
 
 
 (10) (10)
Other
 
 
 
 
 
 (1) (1)
Balance at December 31, 2019
 $
 $909
 $1,485
 $(26) $2,368
 $4,254
 $6,622
(a)Excludes redeemable noncontrolling interests. See Note 7 to the financial statements under "Noncontrolling Interests" for additional information.
(b)In connection with Southern Power becoming a participant to the Southern Company qualified pension plan and other postretirement benefit plan, $27 million of other comprehensive income, net of tax of $9 million, was transferred from SCS.
(c)
See Note 15 under "Southern Power - Sales of Renewable Facility Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statements
We have audited the accompanying consolidated balance sheets and consolidated statements of capitalization of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, the related consolidated statements of income, comprehensive income, common stockholder's equity, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of Southern Company Gas as of December 31, 2019 and 2018, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.
We did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), Southern Company Gas' investment which is accounted for by the use of the equity method. The accompanying consolidated financial statements of Southern Company Gas include its equity investment in SNG of $1,137 million and $1,261 million as of December 31, 2019 and December 31, 2018, respectively, and its earnings from its equity method investment in SNG of $141 million, $131 million, and $88 million for the years ended December 31, 2019, 2018, and 2017, respectively. Those statements were audited by other auditors whose reports (which express unqualified opinions on SNG's financial statements and contain an emphasis of matter paragraph calling attention to SNG's significant transactions with related parties) have been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the reports of the other auditors.
Basis for Opinion
These financial statements are the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion on Southern Company Gas' financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to Southern Company Gas in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Southern Company Gas is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of Southern Company Gas' internal control over financial reporting. Accordingly, we express no such opinion.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits and the reports of the other auditors provide a reasonable basis for our opinion.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020
We have served as Southern Company Gas' auditor since 2016.

CONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Operating Revenues:      
Natural gas revenues (includes revenue taxes of $117, $114, and $100
for the periods presented, respectively)
 $3,793
 $3,874
 $3,787
Alternative revenue programs (1) (20) 4
Other revenues 
 55
 129
Total operating revenues 3,792
 3,909
 3,920
Operating Expenses:      
Cost of natural gas 1,319
 1,539
 1,601
Cost of other sales 
 12
 29
Other operations and maintenance 888
 981
 945
Depreciation and amortization 487
 500
 501
Taxes other than income taxes 213
 211
 184
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Total operating expenses 3,022
 2,994
 3,260
Operating Income 770
 915
 660
Other Income and (Expense):      
Earnings from equity method investments 157
 148
 106
Interest expense, net of amounts capitalized (232) (228) (200)
Other income (expense), net 20
 1
 44
Total other income and (expense) (55) (79) (50)
Earnings Before Income Taxes 715
 836
 610
Income taxes 130
 464
 367
Net Income $585
 $372
 $243
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Southern Company Gas and Subsidiary Companies 2019 Annual Report

  2019 2018 2017
  (in millions)
Net Income $585
 $372
 $243
Other comprehensive income (loss):      
Qualifying hedges:      
Changes in fair value, net of tax of $(2), $2, and $(3), respectively (5) 5
 (5)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $(1), and $-, respectively
 2
 (1) 1
Pension and other postretirement benefit plans:      
Benefit plan net gain (loss), net of tax of $(14), $-, and $-, respectively (16) 
 (1)
Reclassification adjustment for amounts included in net income,
net of tax of $-, $3, and $-, respectively
 
 (2) 
Total other comprehensive income (loss) (19) 2
 (5)
Comprehensive Income $566
 $374
 $238
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
Southern Company Gas and Subsidiary Companies 2019 Annual Report
  2019 2018 2017
  (in millions)
Operating Activities:      
Net income $585
 $372
 $243
Adjustments to reconcile net income to net cash
provided from operating activities —
      
Depreciation and amortization, total 487
 500
 501
Deferred income taxes 213
 (1) 236
Pension and postretirement funding (145) 
 
Impairment charges 115
 42
 
(Gain) loss on dispositions, net 
 (291) 
Mark-to-market adjustments (56) (19) (24)
Other, net (55) (24) (51)
Changes in certain current assets and liabilities —      
-Receivables 467
 (218) (94)
-Natural gas for sale 44
 49
 36
-Prepaid income taxes 40
 (42) (39)
-Other current assets 31
 4
 (24)
-Accounts payable (520) 372
 (20)
-Accrued taxes (69) 10
 110
-Accrued compensation 1
 32
 15
-Other current liabilities (71) (22) (8)
Net cash provided from operating activities 1,067
 764
 881
Investing Activities:      
Property additions (1,408) (1,388) (1,514)
Cost of removal, net of salvage (82) (96) (66)
Change in construction payables, net 24
 (37) 72
Investments in unconsolidated subsidiaries (31) (110) (145)
Returned investment in unconsolidated subsidiaries 67
 20
 80
Proceeds from dispositions and asset sales 32
 2,609
 
Other investing activities 12
 
 5
Net cash provided from (used for) investing activities (1,386) 998
 (1,568)
Financing Activities:      
Increase (decrease) in notes payable, net 
 (868) 262
Proceeds —      
First mortgage bonds 300
 300
 400
Capital contributions from parent company 821
 24
 103
Senior notes 
 
 450
Redemptions and repurchases —      
Gas facility revenue bonds 
 (200) 
Medium-term notes 
 
 (22)
First mortgage bonds (50) 
 
Senior notes (300) (155) 
Return of capital to parent company 
 (400) 
Payment of common stock dividends (471) (468) (443)
Other financing activities (2) (3) (9)
Net cash provided from (used for) financing activities 298
 (1,770) 741
Net Change in Cash, Cash Equivalents, and Restricted Cash (21) (8) 54
Cash, Cash Equivalents, and Restricted Cash at Beginning of Year 70
 78
 24
Cash, Cash Equivalents, and Restricted Cash at End of Year $49
 $70
 $78
Supplemental Cash Flow Information:      
Cash paid (received) during the period for —      
Interest (net of $6, $7, and $11 capitalized, respectively) $251
 $249
 $223
Income taxes (net of refunds) (41) 524
 72
Noncash transactions — Accrued property additions at year-end 122
 97
 135
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Assets 2019 2018
  (in millions)
Current Assets:    
Cash and cash equivalents $46
 $64
Receivables —    
Energy marketing receivable 428
 801
Customer accounts receivable 323
 370
Unbilled revenues 183
 213
Affiliated 5
 11
Other accounts and notes receivable 114
 142
Accumulated provision for uncollectible accounts (18) (30)
Natural gas for sale 479
 524
Prepaid expenses 65
 118
Assets from risk management activities, net of collateral 177
 219
Other regulatory assets 92
 73
Assets held for sale 171
 
Other current assets 41
 50
Total current assets 2,106
 2,555
Property, Plant, and Equipment:    
In service 16,344
 15,177
Less: Accumulated depreciation 4,650
 4,400
Plant in service, net of depreciation 11,694
 10,777
Construction work in progress 613
 580
Total property, plant, and equipment 12,307
 11,357
Other Property and Investments:    
Goodwill 5,015
 5,015
Equity investments in unconsolidated subsidiaries 1,251
 1,538
Other intangible assets, net of amortization of $176 and $145
at December 31, 2019 and December 31, 2018, respectively
 70
 101
Miscellaneous property and investments 20
 20
Total other property and investments 6,356
 6,674
Deferred Charges and Other Assets:    
Operating lease right-of-use assets, net of amortization 93
 
Other regulatory assets, deferred 618
 669
Other deferred charges and assets 207
 193
Total deferred charges and other assets 918
 862
Total Assets $21,687
 $21,448
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

Liabilities and Stockholder's Equity 2019 2018
  (in millions)
Current Liabilities:    
Securities due within one year $
 $357
Notes payable 650
 650
Energy marketing trade payables 442
 856
Accounts payable —    
Affiliated 41
 45
Other 315
 402
Customer deposits 96
 133
Accrued taxes —    
Accrued income taxes 
 66
Other accrued taxes 71
 75
Accrued interest 52
 55
Accrued compensation 100
 100
Liabilities from risk management activities, net of collateral 21
 76
Other regulatory liabilities 94
 79
Other current liabilities 128
 130
Total current liabilities 2,010
 3,024
Long-term Debt (See accompanying statements)
 5,845
 5,583
Deferred Credits and Other Liabilities:    
Accumulated deferred income taxes 1,219
 1,016
Deferred credits related to income taxes 874
 940
Employee benefit obligations 265
 357
Operating lease obligations 78
 
Other cost of removal obligations 1,606
 1,585
Accrued environmental remediation 233
 268
Other deferred credits and liabilities 51
 105
Total deferred credits and other liabilities 4,326
 4,271
Total Liabilities 12,181
 12,878
Common Stockholder's Equity (See accompanying statements)
 9,506
 8,570
Total Liabilities and Stockholder's Equity $21,687
 $21,448
Commitments and Contingent Matters (See notes)
 

 

The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CAPITALIZATION
At December 31, 2019 and 2018
Southern Company Gas and Subsidiary Companies 2019 Annual Report

 Weighted Average Interest Rate
at December 31, 2019
2019201820192018
  (in millions)(percent of total)
Long-Term Debt:     
Long-term notes payable —     
Maturity     
2019$
$300
  
20214.01%330
330
  
20228.63%46
46
  
20232.45%350
350
  
2025-20474.68%3,134
3,134
  
Total long-term notes payable 3,860
4,160
  
Other long-term debt —     
First mortgage bonds —     
Maturity     
2019
50
  
20235.80%50
50
  
2026-20593.94%1,525
1,225
  
Total other long-term debt 1,575
1,325
  
Unamortized fair value adjustment of long-term debt 430
474
  
Unamortized debt discount (20)(19)  
Total long-term debt 5,845
5,940
  
Less amount due within one year 
357
  
Long-term debt excluding amount due within one year 5,845
5,583
38.1%39.4%
Common Stockholder's Equity:     
Common stock — par value $0.01 per share     
Authorized — 100 million shares     
Outstanding — 100 shares     
Paid-in capital 9,697
8,856
  
Accumulated deficit (198)(312)  
Accumulated other comprehensive income 7
26
  
Total common stockholder's equity 9,506
8,570
61.9
60.6
Total Capitalization $15,351
$14,153
100.0%100.0%

The accompanying notes are an integral part of these financial statements.

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY
Southern Company Gas and Subsidiary Companies 2019 Annual Report
 
Number of Common Shares
Issued
 Common Stock Paid-In Capital Retained Earnings (Accumulated Deficit) 
Accumulated
Other
Comprehensive Income (Loss)
 Total
 (in millions)
Balance at December 31, 2016
 $
 $9,095
 $(12) $26
 $9,109
Net income
 
 
 243
 
 243
Capital contributions from parent company
 
 117
 
 
 117
Other comprehensive income (loss)
 
 
 
 (5) (5)
Cash dividends on common stock
 
 
 (443) 
 (443)
Other
 
 2
 
 (1) 1
Balance at December 31, 2017
 
 9,214
 (212) 20
 9,022
Net income
 
 
 372
 
 372
Return of capital to parent company
 
 (400) 
 
 (400)
Capital contributions from parent company
 
 42
 
 
 42
Other comprehensive income
 
 
 
 2
 2
Cash dividends on common stock
 
 
 (468) 
 (468)
Other
 
 
 (4) 4
 
Balance at December 31, 2018
 
 8,856
 (312) 26
 8,570
Net income
 
 
 585
 
 585
Capital contributions from parent company
 
 841
 
 
 841
Other comprehensive income (loss)
 
 
 
 (19) (19)
Cash dividends on common stock
 
 
 (471) 
 (471)
Balance at December 31, 2019
 $
 $9,697
 $(198) $7
 $9,506

The accompanying notes are an integral part of these consolidated financial statements. 

COMBINED NOTES TO FINANCIAL STATEMENTS
Mississippi PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report






Notes to the Financial Statements

for

The Southern Company and Subsidiary Companies
Alabama Power Company
Georgia Power Company
Mississippi Power Company
Southern Power Company and Subsidiary Companies
Southern Company Gas and Subsidiary Companies



Index to the Combined Notes to Financial Statements


Index to Applicable Notes to Financial Statements by Registrant
The following notes to the financial statements are a combined presentation; however, information contained herein relating to any individual Registrant is filed by such Registrant on its own behalf and each Registrant makes no representation as to information related to the other Registrants. The list below indicates the Registrants to which each note applies.
RegistrantApplicable Notes
Southern Company1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
Alabama Power1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17
Georgia Power1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17
Mississippi Power1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 17
Southern Power1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17
Southern Company Gas1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17



COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Mississippi PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
Mississippi Power Company (the Company) is a wholly-owned subsidiary of Southern Company which is the parent company of the Company and three other3 traditional electric operating companies, as well as Southern Power, Southern Company Gas, (as of July 1, 2016), SCS, Southern LINC,Linc, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure, Inc. (PowerSecure) (as of May 9, 2016), and other direct and indirect subsidiaries. The traditional electric operating companies – Alabama Power, Georgia Power, Gulfand Mississippi Power and the Company – are vertically integrated utilities providing electric service in four3 Southeastern states. TheOn January 1, 2019, Southern Company providescompleted the sale of Gulf Power (another traditional electric serviceoperating company through December 31, 2018) to retail customers in southeast Mississippi and to wholesale customers in the Southeast.NextEra Energy. Southern Power develops, constructs, acquires, owns, and manages power generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through natural gas distribution utilities, in seven statesincluding Nicor Gas (Illinois), Atlanta Gas Light (Georgia), Virginia Natural Gas, and Chattanooga Gas (Tennessee). In 2018, Southern Company Gas sold its other natural gas utilities – Elizabethtown Gas (New Jersey), Florida City Gas, and Elkton Gas (Maryland). Southern Company Gas is also involved in several other complementary businesses including gas marketing services,pipeline investments, wholesale gas services, and gas midstream operations.marketing services. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern LINCLinc provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cableoptics services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leaseslease and for other electric services.investments. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants.plants, including Alabama Power's Plant Farley and Georgia Power's Plant Hatch and Plant Vogtle Units 1 and 2, and is currently managing construction of and developing Plant Vogtle Units 3 and 4, which are co-owned by Georgia Power. PowerSecure is a provider of productsprovides energy solutions to electric utilities and servicestheir customers in the areas of distributed generation, energy efficiency,storage and utility infrastructure.renewables, and energy efficiency. See Note 15 for information regarding disposition activities at Southern Power and Southern Company Gas, as well as additional information regarding Southern Company's sale of Gulf Power.
The Registrants' financial statements reflect investments in subsidiaries on a consolidated basis. Intercompany transactions have been eliminated in consolidation. The equity method is used for investments in entities in which a Registrant has significant influence but does not have control and for VIEs where a Registrant has an equity investment but is not the primary beneficiary. Southern Power has partial ownership in certain legal entities for which the contractual provisions represent profit-sharing arrangements because the allocations of cash distributions and tax benefits are not based on fixed ownership percentages. For these arrangements, the noncontrolling interest is accounted for under a balance sheet approach utilizing the HLBV method. The HLBV method calculates each partner's share of income based on the change in net equity the partner can legally claim in a HLBV at the end of the period compared to the beginning of the period. See "Variable Interest Entities" herein and Note 7 for additional information.
The traditional electric operating companies, Southern Power, certain subsidiaries of Southern Company isGas, and certain other subsidiaries are subject to regulation by the FERC, and the Mississippi PSC.traditional electric operating companies and natural gas distribution utilities are also subject to regulation by their respective state PSCs or other applicable state regulatory agencies. As such, the Company'srespective financial statements of the Registrants reflect the effects of rate regulation in accordance with GAAP and comply with the accounting policies and practices prescribed by itsrelevant state PSCs or other applicable state regulatory commissions. agencies.
The preparation of financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates. Certain prior years' data presented in the financial statements have been reclassified to conform to the current year presentation. These reclassifications had no impact on the Registrants' results of operations, financial position, or cash flows. In addition, during 2018, Southern Company Gas recast its reportable segments. See Note 16 under "Southern Company Gas" for additional information.
At December 31, 2019 and 2018, Southern Company and Southern Power each had assets and liabilities held for sale on their balance sheets. At December 31, 2019, Southern Company Gas had assets and liabilities held for sale on its balance sheet. Unless otherwise noted, the disclosures herein related to specific asset and liability balances at December 31, 2019 and 2018 exclude assets and liabilities held for sale. See Note 15 under "Assets Held for Sale" for additional information including major classes of assets and liabilities classified as held for sale by Southern Company, Southern Power, and Southern Company Gas.
Recently IssuedAdopted Accounting Standards
In 2014,See Note 4 for information on the FASB issuedRegistrants' adoption of ASC 606, Revenue from Contracts with Customers replacing the existing accounting standard (ASC 606) effective January 1, 2018.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.Subsidiary Companies 2019 Annual Report
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide electricity without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the electricity supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain PPAs and alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU(ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02unchanged and there is effectiveno change to the accounting for fiscal years beginning after December 15, 2018, with early adoption permitted.existing leveraged leases. The Company is currently evaluating

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Registrants adopted the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company.2019. See Notes 5, 8, 9 for additional information and 11 for disclosures impacted by ASU 2016-09.related disclosures.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
In 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements-Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern (ASU 2014-15). ASU 2014-15 defines management's responsibility to evaluate whether there is substantial doubt about an organization's ability to continue as a going concern within one year of the date the financial statements are issued and to provide related footnote disclosures including management's plans that alleviate substantial doubt. ASU 2014-15 became effective for fiscal years ending after December 15, 2016 and the Company has included the disclosures required by ASU 2014-15 in Note 6 under "Going Concern."
Affiliate Transactions
The traditional electric operating companies, Southern Power, and Southern Company has an agreementGas have agreements with SCS under which certain of the following services are rendered to the Companythem at direct or allocated cost: general executive and advisory, general and design engineering, operations, purchasing, accounting, finance, and treasury, legal, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, cellular tower space, and other services with respect to business and operations, construction management, and Southern Company power pool transactions. These costs are primarily included in other operations and maintenance expenses or capitalized to property, plant, and equipment. Costs for these services from SCS in 2019, 2018, and 2017 were as follows:
 Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power(*)
Southern Company Gas
 (in millions)
2019$527
$704
$118
$90
$183
2018508
653
104
98
194
2017479
625
140
218
63
(*)Prior to December 2017, Southern Power had no employees but was billed for employee-related costs from SCS.
Alabama Power and Georgia Power also have agreements with Southern Nuclear under which Southern Nuclear renders the following nuclear-related services at cost: general executive and advisory services; general operations, management, and technical services; administrative services including procurement, accounting, employee relations, systems, and procedures services; strategic planning and budgeting services; other services with respect to business and operations; and, for Georgia Power, construction management. These costs are primarily included in other operations and maintenance expenses or capitalized to property, plant, and equipment. Costs for these services in 2019, 2018, and 2017 amounted to $231$256 million, $295$247 million, and $259$248 million, during 2016, 2015,respectively, for Alabama Power and 2014, respectively. $760 million, $780 million, and $675 million, respectively, for Georgia Power. See Note 2 under "Georgia PowerNuclear Construction" for additional information regarding Southern Nuclear's construction management of Plant Vogtle Units 3 and 4 for Georgia Power.
Cost allocation methodologies used by SCS and Southern Nuclear prior to the repeal of the Public Utility Holding Company Act of 1935, as amended, were approved by the SEC. Subsequently, additional cost allocation methodologies have been reported to the FERC and management believes they are reasonable. The FERC permits services to be rendered at cost by system service companies.
Alabama Power's and Georgia Power's power purchases from affiliates through the Southern Company power pool are included in purchased power, affiliates on their respective statements of income. Mississippi Power's and Southern Power's power purchases from affiliates through the Southern Company power pool are included in purchased power on their respective statements of income and were as follows:
 
Mississippi
Power
Southern
Power
 (in millions)
2019$3
$14
201815
41
201716
27

Georgia Power has entered into several PPAs with Southern Power for capacity and energy. Georgia Power's total expenses associated with these PPAs were $177 million, $216 million, and $235 million in 2019, 2018, and 2017, respectively. Southern Power's total revenues from all PPAs with Georgia Power, included in wholesale revenue affiliates on Southern Power's consolidated statements of income, were $174 million, $215 million, and $233 million for 2019, 2018, and 2017, respectively.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Included within these revenues were affiliate PPAs accounted for as operating leases, which totaled $116 million, $65 million, and $81 million for 2019, 2018, and 2017, respectively. See Note 9 for additional information.
SCS (as agent for Alabama Power, Georgia Power, and Southern Power) and Southern Company Gas have long-term interstate natural gas transportation agreements with SNG. The interstate transportation service provided to Alabama Power, Georgia Power, Southern Power, and Southern Company Gas by SNG pursuant to these agreements is governed by the terms and conditions of SNG's natural gas tariff and is subject to FERC regulation. See Note 7 under "Southern Company GasEquity Method InvestmentsSNG" for additional information. Transportation costs under these agreements in 2019, 2018, and 2017 were as follows:
 Alabama
Power
Georgia
Power
Southern
Power
Southern Company Gas
 (in millions)
2019$17
$99
$28
$31
20188
101
25
32
20179
102
25
32
In November 2018, SNG purchased the natural gas lateral pipeline serving Plant McDonough Units 4 through 6 from Georgia Power at net book value, as approved by the Georgia PSC. In January 2020, SNG paid Georgia Power $142 million, which included $71 million contributed to SNG by Southern Company Gas for its proportionate share. During the interim period, Georgia Power received a discounted shipping rate to reflect the deferred consideration and SNG constructed an extension to the pipeline.
SCS, as agent for the traditional electric operating companies and Southern Power, has agreements with certain subsidiaries of Southern Company Gas to purchase natural gas. Natural gas purchases made under these agreements were immaterial for Alabama Power and Mississippi Power and as follows for Georgia Power and Southern Power in 2019, 2018, and 2017:
 Georgia
Power
Southern
Power
 (in millions)
2019$4
$64
201821
119
201722
119

Alabama Power and Mississippi Power jointly own Plant Greene County. The companies have an agreement with Alabama Power under which the Company owns a portion of Greene County Steam Plant. Alabama Power operates Plant Greene County Steam Plant, and the CompanyMississippi Power reimburses Alabama Power for its proportionate share of non-fuel expendituresoperations and costs,maintenance expenses, which totaled $13$9 million, $8 million, and $9 million in 2019, 2018, and 2017, respectively. See Note 5 under "Joint Ownership Agreements" for additional information.
Alabama Power has an agreement with Gulf Power under which Alabama Power made transmission system upgrades to ensure firm delivery of energy under a non-affiliate PPA from a combined cycle plant located in Autauga County, Alabama. Under a related tariff, Alabama Power received $11 million in each of 2018 and $132017. See Note 15 under "Southern Company" for information regarding the sale of Gulf Power.
Alabama Power has agreements with PowerSecure for services related to utility infrastructure construction, distributed energy, and energy efficiency projects. Costs for these services amounted to approximately $7 million, $24 million, and $11 million in 2016, 2015,2019, 2018, and 2014,2017, respectively. Also, the Company
See Note 7 under "SEGCO" for information regarding Alabama Power's and Georgia Power's equity method investment in SEGCO and related affiliate purchased power costs, as well as Alabama Power's gas pipeline ownership agreement with SEGCO.
Georgia Power has a joint ownership agreement with Gulf Power under which Gulf Power owns a 25% portion of Plant Scherer Unit 3. Under this agreement, Georgia Power operates Plant Scherer Unit 3 and Gulf Power reimburses AlabamaGeorgia Power for any direct fuel purchases delivered from an Alabama Power transfer facility. There were no fuel purchases in 2016. Fuel purchasesits 25% proportionate share of the related non-fuel expenses, which were $8 million and $34$11 million in 20152018 and 2014,2017, respectively. TheSee Note 5 under "Joint Ownership Agreements" and Note 15 under "Southern Company also" for additional information.
Mississippi Power has an agreement with Gulf Power under which Gulf Power owns a portion of Plant Daniel. The CompanyMississippi Power operates Plant Daniel and Gulf Power reimburses the CompanyMississippi Power for its proportionate share of all associated expendituresnon-fuel

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and costs,Subsidiary Companies 2019 Annual Report

operations and maintenance expenses, which totaled $26 million, $27 million, and $31 million in 2016, 2015,each of 2018 and 2014, respectively.2017. See Note 45 under "Joint Ownership Agreements" and Note 15 under "Southern Company" for additional information.
On June 27, 2016,Southern Power has several agreements with SCS for transmission services. Transmission services purchased by Southern Power from SCS totaled $15 million, $12 million, and $13 million for 2019, 2018, and 2017, respectively, and were charged to other operations and maintenance expenses in Southern Power's consolidated statements of income. All charges were billed to Southern Power based on the Company received a capital contribution from Southern Company of $225 million,Open Access Transmission Tariff as filed with the proceeds of which were used to repay to Southern Company a portion of the promissory note issued in November 2015. As of December 31, 2016, the amount of outstanding promissory notes to Southern Company totaled $551 million. Also, on December 14, 2016, the Company received a capital contribution from Southern Company of $400 million, the proceeds of which were used for general corporate purposes. See Note 6 for additional information.FERC.
The Company also provides incidental services to and receives such services from other Southern Company subsidiaries which

NOTES (continued)
Mississippi Power Company 2016 Annual Report

are generally minor in duration and amount. Except as described herein, the Company neither provided nor received any material services to or from affiliates in 2016, 2015, or 2014.
The traditional electric operating companies including the Company and SouthernSouthern Power may jointly enter into various types of wholesale energy, natural gas, and certain other contracts, either directly or through SCS as agent. Each participating company may be jointly and severally liable for the obligations incurred under these agreements. See Note 714 under "Fuel and Purchased Power Agreements""Contingent Features" for additional information.
Regulatory Assets Southern Power and Liabilities
The Company is subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers through the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
Regulatory assets and (liabilities) reflected in the balance sheets at December 31 relate to:
 2016
 2015
 Note
 (in millions)
Kemper IGCC$201
 $216
 (h)
Retiree benefit plans – regulatory assets173
 163
 (a,g)
Asset retirement obligations83
 70
 (c)
Deferred income tax charges362
 291
 (c)
Remaining net book value of retired assets53
 36
 (b)
Property tax37
 27
 (d)
Plant Daniel Units 3 and 433
 29
 (j)
Other regulatory assets42
 27
 (e,g)
Fuel-hedging (realized and unrealized) losses7
 50
 (f,g)
Property damage(68) (64) (i)
Other cost of removal obligations(170) (167) (c)
Other regulatory liabilities(16) (11) (b)
Total regulatory assets (liabilities), net$737
 $667
  
Note: The recovery and amortization periods for these regulatory assets and (liabilities) are as follows:
(a)
Recovered and amortized over the average remaining service period which may range up to 14 years. See Note 2 for additional information.
(b)Other regulatory liabilities is comprised of numerous immaterial components including deferred income tax credits and other miscellaneous liabilities that are recorded and refunded or amortized as approved by the Mississippi PSC generally over periods not exceeding one year.
(c)Asset retirement and other cost of removal obligations and deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 49 years. Asset retirement and removal assets and liabilities will be settled and trued up following completion of the related activities.
(d)The retail portion of property taxes is recovered through the ad valorem tax adjustment clause over a 12-month period beginning in April of the following year. See Note 3 under "Retail Regulatory Matters – Ad Valorem Tax Adjustment" for additional information.
(e)Other regulatory assets is comprised of numerous immaterial components including vacation pay, loss on reacquired debt, and other miscellaneous assets. These costs are recorded and recovered or amortized as approved by the Mississippi PSC over periods which may range up to 50 years.
(f)Fuel-hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three years. Upon final settlement, actual costs incurred are recovered through the ECM.
(g)Not earning a return as offset in rate base by a corresponding asset or liability.
(h)Includes $97 million of regulatory assets currently in rates to be recovered over periods of two, seven, or 10 years. For additional information, see Note 3 under "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs – Regulatory Assets and Liabilities."
(i)For additional information, see Note 1 under "Provision for Property Damage."
(j)
The difference between the revenue requirement under the purchase option and the revenue requirement assuming operating lease accounting treatment for the extended term is deferred and amortized over a10-year period beginning October 2021.
In the event that a portion of the Company's operations is no longer subject to applicable accounting rules for rate regulation, the Company would be required to write off to income or reclassify to accumulated OCI related regulatory assets and liabilities that are not specifically recoverable through regulated rates. In addition, the Company would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets

NOTES (continued)
Mississippi Power Company 2016 Annual Report

and liabilities are to be reflected in rates. See Note 3 under "Retail Regulatory Matters" and "Integrated Coal Gasification Combined Cycle" for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper IGCC through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2 (Initial DOE Grants). Through December 31, 2016, the Company has received grant funds of $382 million, of which $245 million of the Initial DOE Grants were used for the construction of the Kemper IGCC, which is reflected in the Company's financial statements as a reduction to the Kemper IGCC capital costs, and $137 million received on April 8, 2016 (Additional DOE Grants), which are expected to be used to reduce future rate impacts. An additional $25 million is expected to be received for its initial operation. See Note 3 under "Kemper IGCC Schedule and Cost Estimate" for additional information.
Revenues
Energy and other revenues are recognized as services are provided. Wholesale capacity revenues from long-term contracts are recognized at the lesser of the levelized amount or the amount billable under the contract over the respective contract period. Unbilled revenues related to retail sales are accrued at the end of each fiscal period. The Company's retail and wholesale rates include provisions to adjust billings for fluctuations in fuel costs, fuel hedging, the energy component of purchased power costs, and certain other costs. Retail rates also include provisions to adjust billings for fluctuations in costs for ad valorem taxes and certain qualifying environmental costs. Revenues are adjusted for differences between these actual costs and projected amounts billed in current regulated rates. Under or over recovered regulatory clause revenues are recorded in the balance sheets and are recovered or returned to customers through adjustments to the billing factors. The Company is required to file with the Mississippi PSC for an adjustment to the fuel cost recovery, ad valorem, and environmental factors annually.
The Company serves long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based MRA electric tariffs which are subject to regulation by the FERC. The contracts with these wholesale customers represented 19.8% of the Company's total operating revenues in 2016 and are largely subject to rolling 10-year cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.
Except as described above for the Company's cost-based MRA electric tariff customers, the Company has a diversified base of customers and no single customer or industry comprises 10% or more of revenues. For all periods presented, uncollectible accounts averaged less than 1% of revenues.
See Note 3 under "Retail Regulatory Matters" for additional information.
Fuel Costs
Fuel costs are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. Fuel costs also include gains and/or losses from fuel-hedging programs as approved by the Mississippi PSC.
Income and Other Taxes
The Company uses the liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. ITCs utilized are deferred and amortized to income over the average life of the related property. Taxes that are collected from customers on behalf of governmental agencies to be remitted to these agencies are presented net on the statements of operations.
The Company recognizes tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 5 under "Unrecognized Tax Benefits" for additional information.
Property, Plant, and Equipment
Property, plant, and equipment is stated at original cost less any regulatory disallowances and impairments. Original cost includes: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and cost of equity funds used during construction for projects where recovery of CWIP is not allowed in rates.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The Company's property, plant, and equipment in service consisted of the following at December 31:
 2016 2015
 (in millions)
Generation$2,632
 $2,723
Transmission712
 688
Distribution916
 891
General520
 503
Plant acquisition adjustment85
 81
Total plant in service$4,865
 $4,886
The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses except for all costs associated with operating and maintaining the Kemper IGCC assets already placed in service and a portion of the railway track maintenance costs. The portion of railway track maintenance costs not charged to operations and maintenance expenses are charged to fuel stock and recovered through the Company's fuel clause. Through July 2015, all costs associated with the combined cycle and the associated common facilities portion of the Kemper IGCC, excluding the lignite mine, were deferred to a regulatory asset that is being recovered over 10 years beginning August 2015. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information.
Depreciation, Depletion, and Amortization
Depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates, which approximated 4.2% in 2016, 4.7% in 2015, and 3.3% in 2014. The decrease in the 2016 depreciation rate is primarily due to fully depreciating and retiring the ARO at Plant Watson, partially offset by the increase in depreciation for the Plant Daniel scrubbers for a full year. The increase in the 2015 depreciation rate was primarily due to an ARO at Plant Watson incurred as a result of changes in environmental regulations. See "Asset Retirement Obligations and Other Costs of Removal" herein for additional information. Depreciation studies are conducted periodically to update the composite rates. The Mississippi PSC approved the 2014 study, with new rates effective January 1, 2015. When property subject to depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. Minor items of property included in the original cost of the plant are retired when the related property unit is retired. Depreciation includes an amount for the expected cost of removal of facilities, except for the Kemper IGCC assets in service.
The Kemper IGCC will be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by the Company and situated adjacent to the Kemper IGCC. The mine, operated by North American Coal Corporation, started commercial operation in June 2013. Depreciation associated with fixed assets, amortization associated with rolling stock, and depletion associated with minerals and minerals rights is recognized and charged to fuel stock and is expected to be recovered through the Company's fuel clause. Through July 2015, depreciation associated with the combined cycle and the associated common facilities portion of the Kemper IGCC was deferred as a regulatory asset that is being recovered over 10 years beginning August 2015. See Note 3 under "Integrated Coal Gasification Combined Cycle – Rate Recovery of Kemper IGCC Costs" for additional information.
Asset Retirement Obligations and Other Costs of Removal
AROs are computed as the present value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. The Company has received accounting guidance from the Mississippi PSC allowing the continued accrual of other future retirement costs for long-lived assets that the Company does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as a regulatory liability.
The liability for AROs primarily relates to facilities that are subject to the Disposal of Coal Combustion Residuals from Electric Utilities final rule published by the EPA in April 2015 (CCR Rule), principally ash ponds. In addition, the Company has retirement obligations related to various landfill sites, underground storage tanks, deep injection wells, water wells, substation removal, mine reclamation, and asbestos removal. The Company also has identified AROs related to certain transmission and

NOTES (continued)
Mississippi Power Company 2016 Annual Report

distribution facilities and certain wireless communication towers. However, liabilities for the removal of these assets have not been recorded because the settlement timing for the AROs related to these assets is indeterminable and, therefore, the fair value of the AROs cannot be reasonably estimated. A liability for these AROs will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO. The Company will continue to recognize in the statements of operations allowed removal costs in accordance with its regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability, as ordered by the Mississippi PSC, and are reflected in the balance sheets.
Details of the AROs included in the balance sheets are as follows:
 2016 2015
 (in millions)
Balance at beginning of year$177
 $48
Liabilities incurred15
 101
Liabilities settled(23) (3)
Accretion5
 4
Cash flow revisions5
 27
Balance at end of year$179
 $177
The increase in liabilities incurred and cash flow revisions in 2015 primarily relate to an increase in AROs associated with facilities impacted by the CCR Rule located at Plant Watson and Plant Greene County.
The cost estimates for AROs related to the CCR Rule are based on information as of December 31, 2016 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule requirements for closure. As further analysis is performed, including evaluation of the expected method of compliance, refinement of assumptions underlying the cost estimates, such as the quantities of CCR at each site, and the determination of timing with respect to compliance activities, including the potential for closing ash ponds prior to the end of their currently anticipated useful life, the Company expects to continue to periodically update these estimates.
Allowance for Funds Used During Construction
The Company records AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the plant through a higher rate base and higher depreciation. The equity component of AFUDC is not included in the calculation of taxable income. The average annual AFUDC rate was 6.50%, 5.99%, and 6.91% for the years ended December 31, 2016, 2015, and 2014, respectively. AFUDC equity was $124 million, $110 million, and $136 million in 2016, 2015, and 2014, respectively.
Impairment of Long-Lived Assets and Intangibles
The Company evaluates long-lived assets for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. The determination of whether an impairment has occurred is based on either a specific regulatory disallowance or an estimate of undiscounted future cash flows attributable to the assets, as compared with the carrying value of the assets. If an impairment has occurred, the amount of the impairment recognized is determined by either the amount of regulatory disallowance or by estimating the fair value of the assets and recording a loss if the carrying value is greater than the fair value. For assets identified as held for sale, the carrying value is compared to the estimated fair value less the cost to sell in order to determine if an impairment loss is required. Until the assets are disposed of, their estimated fair value is re-evaluated when circumstances or events change. See Note 3 under "Integrated Coal Gasification Combined Cycle – Kemper IGCC Schedule and Cost Estimate" for additional information.
Provision for Property Damage
The Company carries insurance for the cost of certain types of damage to generation plants and general property. However, the Company is self-insured for the cost of storm, fire, and other uninsured casualty damage to its property, including transmission and distribution facilities. As permitted by the Mississippi PSC and the FERC, the Company accrues for the cost of such damage through an annual expense accrual credited to regulatory liability accounts for the retail and wholesale jurisdictions. The cost of repairing actual damage resulting from such events that individually exceed $50,000 is charged to the reserve. Every three years the Mississippi PSC, the MPUS, and the Company will agree on SRR revenue level(s) for the ensuing period, based on historical data, expected exposure, type and amount of insurance coverage, excluding insurance cost, and any other relevant information.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The accrual amount and the reserve balance are determined based on the SRR revenue level(s). If a significant change in circumstances occurs, then the SRR revenue level can be adjusted more frequently if the Company and the MPUS or the Mississippi PSC deem the change appropriate. The property damage reserve accrual will be the difference between the approved SRR revenues and the SRR revenue requirement, excluding any accrual to the reserve. In addition, SRR allows the Company to set up a regulatory asset, pending review, if the allowable actual retail property damage costs exceed the amount in the retail property damage reserve. The Company made retail accruals of $4 million for 2016 and $3 million for each of 2015 and 2014. The Company also accrued $0.3 million annually in 2016, 2015, and 2014 for the wholesale jurisdiction. As of December 31, 2016, the property damage reserve balances were $66 million and $1 million for retail and wholesale, respectively.
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Materials and Supplies
Generally, materials and supplies include the average cost of transmission, distribution, mining, and generating plant materials. Materials are charged to inventory when purchased and then expensed, capitalized to plant, or charged to fuel stock, as used, at weighted-average cost when utilized.
Fuel Inventory
Fuel inventory includes the average cost of coal, lignite, natural gas, oil, transportation, and emissions allowances. Fuel costs are recorded to inventory when purchased, except for the cost of owning and operating the lignite mine related to the Kemper IGCC which is charged to inventory as coal is mined, and then expensed, at weighted average cost, as used and recovered by the Company through fuel cost recovery rates or capitalized as part of the Kemper IGCC costs if used for testing. The retail rate is approved by the Mississippi PSC and the wholesale rates are approved by the FERC. Emissions allowances granted by the EPA are included in inventory at zero cost.
Financial Instruments
The Company uses derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, electricity purchases and sales, and occasionally foreign currency exchange rates. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (included in "Other" or shown separately as "Risk Management Activities") and are measured at fair value. See Note 9 for additional information regarding fair value. Substantially all of the Company's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from the fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Fuel and interest rate derivative contracts qualify as cash flow hedges of anticipated transactions or are recoverable through the Mississippi PSC approved fuel-hedging program as discussed below result in the deferral of related gains and losses in OCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. Foreign currency exchange rate hedges are designated as fair value hedges. Settled foreign currency exchange hedges related to the Kemper IGCC are recorded in CWIP. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the statements of operations. Cash flows from derivatives are classified on the statement of cash flows in the same category as the hedged item. See Note 10 for additional information regarding derivatives.
Beginning in 2016, the Company offsets fair value amounts recognized for multiple derivative instruments executed with the same counterparty under a netting arrangement. Additionally, the Company's collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2016 are immaterial.
The Company has an ECM clause which, among other things, allows the Company to utilize financial instruments to hedge its fuel commitments. Changes in the fair value of these financial instruments are recorded as regulatory assets or liabilities. Amounts paid or received as a result of financial settlement of these instruments are classified as fuel expense and are included in the ECM factor applied to customer billings. The Company's jurisdictional wholesale customers have a similar ECM mechanism, which has been approved by the FERC.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company has established controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income, changes in the fair value of qualifying cash flow hedges, and reclassifications for amounts included in net income.
Variable Interest Entities
The primary beneficiary of a variable interest entity (VIE) is required to consolidate the VIE when it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE.
The Company is required to provide financing for all costs associated with the mine development and operation under a contract with Liberty Fuels Company, LLC, a subsidiary of North American Coal Corporation (Liberty Fuels), in conjunction with the construction of the Kemper IGCC. Liberty Fuels qualifies as a VIE for which the Company is the primary beneficiary. As of December 31, 2016, the VIE consolidation resulted in an ARO asset and associated liability in the amounts of $20 million and $24 million, respectively. As of December 31, 2015, the VIE consolidation resulted in an ARO and an associated liability in the amounts of $21 million and $25 million, respectively. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information.
2. RETIREMENT BENEFITS
The Company has a defined benefit, trusteed, pension plan covering substantially all employees. This qualified pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). On December 19, 2016, the Company voluntarily contributed $47 million to the qualified pension plan. No mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2017. The Company also provides certain defined benefit pension plans for a selected group of management and highly compensated employees. Benefits under these non-qualified pension plans are funded on a cash basis. In addition, the Company provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans. The Company funds its other postretirement trusts to the extent required by the FERC. For the year ending December 31, 2017, no other postretirement trust contributions are expected.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the following year and the benefit obligations as of the measurement date are presented below.
Assumptions used to determine net periodic costs:2016 2015 2014
Pension plans     
Discount rate – benefit obligations4.69% 4.17% 5.01%
Discount rate – interest costs3.97
 4.17
 5.01
Discount rate – service costs5.04
 4.49
 5.01
Expected long-term return on plan assets8.20
 8.20
 8.20
Annual salary increase4.46
 3.59
 3.59
Other postretirement benefit plans     
Discount rate – benefit obligations4.47% 4.03% 4.85%
Discount rate – interest costs3.66
 4.03
 4.85
Discount rate – service costs4.88
 4.38
 4.85
Expected long-term return on plan assets7.07
 7.23
 7.30
Annual salary increase4.46
 3.59
 3.59
Assumptions used to determine benefit obligations:2016 2015
Pension plans   
Discount rate4.44% 4.69%
Annual salary increase4.46
 4.46
Other postretirement benefit plans   
Discount rate4.22% 4.47%
Annual salary increase4.46
 4.46
The Company estimates the expected rate of return on pension plan and other postretirement benefit plan assets using a financial model to project the expected return on each current investment portfolio. The analysis projects an expected rate of return on each of seven different asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a periodic rebalancing of each trust's portfolio.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO as of December 31, 2016 were as follows:
 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.50% 4.50% 2025
Post-65 medical5.00
 4.50
 2025
Post-65 prescription10.00
 4.50
 2025
An annual increase or decrease in the assumed medical care cost trend rate of 1% would affect the APBO and the service and interest cost components at December 31, 2016 as follows:
 
1 Percent
Increase
 
1 Percent
Decrease
 (in millions)
Benefit obligation$5
 $4
Service and interest costs
 
Pension Plans
The total accumulated benefit obligation for the pension plans was $479 million at December 31, 2016 and $447 million at December 31, 2015. Changes in the projected benefit obligations and the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$500
 $513
Service cost13
 13
Interest cost19
 21
Benefits paid(20) (22)
Actuarial (gain) loss22
 (25)
Balance at end of year534
 500
Change in plan assets   
Fair value of plan assets at beginning of year430
 446
Actual return (loss) on plan assets39
 4
Employer contributions50
 2
Benefits paid(20) (22)
Fair value of plan assets at end of year499
 430
Accrued liability$(35) $(70)
At December 31, 2016, the projected benefit obligations for the qualified and non-qualified pension plans were $504 million and $30 million, respectively. All pension plan assets are related to the qualified pension plan.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's pension plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$154
 $144
Other current liabilities(3) (3)
Employee benefit obligations(32) (67)
Presented below are the amounts included in regulatory assets at December 31, 2016 and 2015 related to the defined benefit pension plans that had not yet been recognized in net periodic pension cost along with the estimated amortization of such amounts for 2017.
 2016 2015 Estimated Amortization in 2017
 (in millions)
Prior service cost$3
 $2
 $1
Net (gain) loss151
 142
 7
Regulatory assets$154
 $144
  
The changes in the balance of regulatory assets related to the defined benefit pension plans for the years ended December 31, 2016 and 2015 are presented in the following table:
 2016 2015
 (in millions)
Regulatory assets:   
Beginning balance$144
 $151
Net (gain) loss16
 4
Change in prior service costs2
 
Reclassification adjustments:   
Amortization of prior service costs(1) (1)
Amortization of net gain (loss)(7) (10)
Total reclassification adjustments(8) (11)
Total change10
 (7)
Ending balance$154
 $144
Components of net periodic pension cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$13
 $13
 $10
Interest cost19
 21
 20
Expected return on plan assets(35) (33) (29)
Recognized net (gain) loss7
 10
 5
Net amortization1
 1
 1
Net periodic pension cost$5
 $12
 $7
Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the Company has elected to amortize changes in the market value of all plan assets over five years rather than recognize the changes immediately. As a result, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2016, estimated benefit payments were as follows:
 
Benefit
Payments
 (in millions)
2017$22
201823
201924
202026
202127
2022 to 2026154
Other Postretirement Benefits
Changes in the APBO and in the fair value of plan assets during the plan years ended December 31, 2016 and 2015 were as follows:
 2016 2015
 (in millions)
Change in benefit obligation   
Benefit obligation at beginning of year$97
 $96
Service cost1
 1
Interest cost3
 4
Benefits paid(6) (5)
Actuarial (gain) loss1
 (1)
Plan amendment
 1
Retiree drug subsidy1
 1
Balance at end of year97
 97
Change in plan assets   
Fair value of plan assets at beginning of year23
 24
Actual return (loss) on plan assets1
 
Employer contributions4
 3
Benefits paid(5) (4)
Fair value of plan assets at end of year23
 23
Accrued liability$(74) $(74)
Amounts recognized in the balance sheets at December 31, 2016 and 2015 related to the Company's other postretirement benefit plans consist of the following:
 2016 2015
 (in millions)
Other regulatory assets, deferred$21
 $21
Other regulatory liabilities, deferred(2) (3)
Employee benefit obligations(74) (74)

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Approximately $19 million and $18 million was included in net regulatory assets at December 31, 2016 and 2015, respectively, related to the net loss for the other postretirement benefit plans that had not yet been recognized in net periodic other postretirement benefit cost. The estimated amortization of such amounts for 2017 is $1 million.
The changes in the balance of net regulatory assets (liabilities) related to the other postretirement benefit plans for the plan years ended December 31, 2016 and 2015 are presented in the following table:
 2016 2015
 (in millions)
Net regulatory assets (liabilities):   
Beginning balance$18
 $16
Net (gain) loss2
 
Change in prior service costs
 3
Reclassification adjustments:   
Amortization of net gain (loss)(1) (1)
Total reclassification adjustments(1) (1)
Total change1
 2
Ending balance$19
 $18
Components of the other postretirement benefit plans' net periodic cost were as follows:
 2016 2015 2014
 (in millions)
Service cost$1
 $1
 $1
Interest cost3
 4
 4
Expected return on plan assets(1) (2) (2)
Net amortization1
 1
 
Net periodic postretirement benefit cost$4
 $4
 $3
Future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. Estimated benefit payments are reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 
Benefit
Payments
 
Subsidy
Receipts
 Total
 (in millions)
2017$6
 $(1) $5
20186
 (1) 5
20197
 (1) 6
20207
 (1) 6
20217
 (1) 6
2022 to 202636
 (1) 35
Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code of 1986, as amended (Internal Revenue Code). The Company's investment policies for both the pension plan and the other postretirement benefit plans cover a diversified mix of assets, including equity and fixed income securities, real estate, and private equity. Derivative instruments are used primarily to gain efficient exposure to the various asset classes and as hedging tools. The Company minimizes the risk of large losses primarily through diversification but also monitors and manages other aspects of risk.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The composition of the Company's pension plan and other postretirement benefit plan assets as of December 31, 2016 and 2015, along with the targeted mix of assets for each plan, is presented below:
 Target 2016 2015
Pension plan assets:     
Domestic equity26% 29% 30%
International equity25
 22
 23
Fixed income23
 29
 23
Special situations3
 2
 2
Real estate investments14
 13
 16
Private equity9
 5
 6
Total100% 100% 100%
Other postretirement benefit plan assets:     
Domestic equity21% 23% 24%
International equity20
 18
 18
Domestic fixed income38
 43
 38
Special situations3
 2
 2
Real estate investments11
 10
 13
Private equity7
 4
 5
Total100% 100% 100%
The investment strategy for plan assets related to the Company's qualified pension plan is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significant portion of the liability of the pension plan is long-term in nature, the assets are invested consistent with long-term investment expectations for return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Company employs a formal rebalancing program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices.
Investment Strategies
Detailed below is a description of the investment strategies for each major asset category for the pension and other postretirement benefit plans disclosed above:
Domestic equity. A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.
International equity. A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Fixed income. A mix of domestic and international bonds.
Special situations. Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies as well as investments in promising new strategies of a longer-term nature.
Real estate investments. Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.
Private equity. Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Benefit Plan Asset Fair Values
Following are the fair value measurements for the pension plan and the other postretirement benefit plan assets as of December 31, 2016 and 2015. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, management

NOTES (continued)
Mississippi Power Company 2016 Annual Report

relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
Valuation methods of the primary fair value measurements disclosed in the following tables are as follows:
Domestic and international equity.Investments in equity securities such as common stocks, American depositary receipts, and real estate investment trusts that trade on a public exchange are classified as Level 1 investments and are valued at the closing price in the active market. Equity investments with unpublished prices (i.e. pooled funds) are valued as Level 2, when the underlying holdings used to value the investment are comprised of Level 1 or Level 2 equity securities.
Fixed income.Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
Real estate investments, private equity, and special situations investments.Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.
The fair values of pension plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2015, investments in special situations were presented in the table below based on the nature of the investment.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$95
 $44
 $
 $
 $139
International equity(*)
58
 51
 
 
 109
Fixed income:         
U.S. Treasury, government, and agency bonds
 28
 
 
 28
Mortgage- and asset-backed securities
 1
 
 
 1
Corporate bonds
 46
 
 
 46
Pooled funds
 25
 
 
 25
Cash equivalents and other47
 
 
 
 47
Real estate investments15
 
 
 54
 69
Special situations
 
 
 8
 8
Private equity
 
 
 26
 26
Total$215
 $195
 $
 $88
 $498
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$76
 $32
 $
 $
 $108
International equity(*)
55
 46
 
 
 101
Fixed income:         
U.S. Treasury, government, and agency bonds
 21
 
 
 21
Mortgage- and asset-backed securities
 9
 
 
 9
Corporate bonds
 53
 
 
 53
Pooled funds
 23
 
 
 23
Cash equivalents and other
 7
 
 
 7
Real estate investments14
 
 
 57
 71
Private equity
 
 
 30
 30
Total$145
 $191
 $
 $87
 $423
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
The fair values of other postretirement benefit plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases.
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$4
 $2
 $
 $
 $6
International equity(*)
2
 2
 
 
 4
Fixed income:         
U.S. Treasury, government, and agency bonds
 5
 
 
 5
Mortgage- and asset-backed securities
 
 
 
 
Corporate bonds
 2
 
 
 2
Pooled funds
 1
 
 
 1
Cash equivalents and other2
 
 
 
 2
Real estate investments1
 
 
 2
 3
Private equity
 
 
 1
 1
Total$9
 $12
 $
 $3
 $24
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Assets:         
Domestic equity(*)
$3
 $1
 $
 $
 $4
International equity(*)
2
 2
 
 
 4
Fixed income:         
U.S. Treasury, government, and agency bonds
 6
 
 
 6
Mortgage- and asset-backed securities
 
 
 
 
Corporate bonds
 2
 
 
 2
Pooled funds
 1
 
 
 1
Cash equivalents and other1
 
 
 
 1
Real estate investments1
 
 
 3
 4
Private equity
 
 
 1
 1
Total$7
 $12
 $
 $4
 $23
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.
Employee Savings Plan
The Company also sponsors a 401(k) defined contribution plan covering substantially all employees. The Company provides an 85% matching contribution on up to 6% of an employee's base salary. Total matching contributions made to the plan for 2016, 2015, and 2014 were $5 million each year.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
The Company is subject to certain claims and legal actions arising in the ordinary course of business. In addition, the Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions, CCR, and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.
Environmental Matters
Environmental Remediation
The Company must comply with environmental laws and regulations that cover the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Company may also incur substantial costs to clean up affected sites. The Company has authority from the Mississippi PSC to recover approved environmental compliance costs through established regulatory mechanisms.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

FERC Matters
Municipal and Rural Associations Tariff
In 2013, the FERC accepted a settlement agreement entered into by the Company with its wholesale customers which approved, among other things, the same regulatory treatment for tariff ratemaking as the treatment approved for retail ratemaking by the Mississippi PSC for certain items. The regulatory treatment includes (i) approval to establish a regulatory asset for the portion of non-capitalizable Kemper IGCC-related costs which have been and will continue to be incurred during the construction period for the Kemper IGCC, (ii) authorization to defer as a regulatory asset, for the 10-year period ending October 2021, the difference between the revenue requirement under the purchase option of Plant Daniel Units 3 and 4 (assuming a remaining 30-year life) and the revenue requirement assuming the continuation of the operating lease regulatory treatment with the accumulated deferred balance at the end of the deferral being amortized into wholesale rates over the remaining life of Plant Daniel Units 3 and 4, and (iii) authority to defer in a regulatory asset costs related to the retirement or partial retirement of generating units as a result of environmental compliance rules.
In 2014, the Company reached, and the FERC accepted, a settlement agreement with its wholesale customers for an estimated annual increase in the MRA cost-based tariff of approximately $10 million, effective May 1, 2014. Included in this settlement agreement was a mechanism allowing the Company to adjust the wholesale revenue requirement in a subsequent rate proceeding in the event the Kemper IGCC, or any substantial portion thereof, was placed in service before or after December 1, 2014. Therefore, the Company recorded a regulatory asset as a result of a portion of the Kemper IGCC being placed in service prior to the projected date, which was fully amortized as of December 31, 2015.
In May 2015, the FERC accepted a further settlement agreement between the Company and its wholesale customers to forgo a MRA cost-based electric tariff increase by, among other things, increasing the accrual of AFUDC and lowering the portion of CWIP in rate base, effective April 1, 2015, resulting in an estimated annual AFUDC increase of approximately $14 million, of which approximately $11 million is related to the Kemper IGCC.
On March 31, 2016, the Company reached a settlement agreement with its wholesale customers, which was subsequently approved by the FERC, for an increase in wholesale base revenues under the MRA cost-based electric tariff, primarily as a result of placing scrubbers for Plant Daniel Units 1 and 2 in service in November 2015. The settlement agreement became effective for services rendered beginning May 1, 2016, resulting in an estimated annual revenue increase of $7 million under the MRA cost-based electric tariff. Additionally, under the settlement agreement, the tariff customers agreed to similar regulatory treatment for MRA tariff ratemaking as the treatment approved for retail ratemaking through an order issued by the Mississippi PSC in December 2015 (In-Service Asset Rate Order). This regulatory treatment primarily includes (i) recovery of the Kemper IGCC assets currently operational and providing service to customers and other related costs, (ii) amortization of the Kemper IGCC-related regulatory assets included in rates under the settlement agreement over the 36 months ending April 30, 2019, (iii) Kemper IGCC-related expenses included in rates under the settlement agreement no longer being deferred and charged to expense, and (iv) removing all of the Kemper IGCC CWIP from rate base with a corresponding increase in accrual of AFUDC. The additional resulting AFUDC is estimated to be approximately $14 million through the Kemper IGCC's projected in-service date of mid-March 2017.
Fuel Cost Recovery
The Company has a wholesale MRA and a Market Based (MB) fuel cost recovery factor. Effective with the first billing cycle for September 2016, fuel rates decreased $11 million annually for wholesale MRA customers and $1 million annually for wholesale MB customers. At December 31, 2016 and 2015, the amount of over recovered wholesale MRA fuel costs were approximately $13 million and $24 million, respectively, which is included in over recovered regulatory clause liabilities, current in the balance sheets. Effective January 1, 2017, the wholesale MRA fuel rate increased $10 million annually.
The Company's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on the Company's revenues or net income, but will affect cash flow.
Market-Based Rate Authority
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies (includinggenerally settle amounts related to the Company) and above transactions on a monthly basis in the month following the performance of such services or the purchase or sale of electricity. See "RevenuesSouthern Power filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the" herein for additional information.
The traditional electric operating companies' (including the Company's)companies, Southern Power, and Southern Power's existing

NOTES (continued)
Mississippi Powerand receive such services from other Southern Company 2016 Annual Report

tailored mitigation may not effectively mitigate the potential to exert market powersubsidiaries which are generally minor in certain areas served byduration and amount. Except as described herein, the traditional electric operating companies, and in some adjacent areas. The FERC directed the traditional electric operating companies (including the Company)Southern Power, and Southern PowerCompany Gas neither provided nor received any material services to show why market-based rate authority should not be revokedor from affiliates in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies (including the Company) and Southern Power filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies (including the Company) and Southern Power filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' (including the Company's) and Southern Power's potential to exert market power in certain areas served by the traditional electric operating companies (including the Company) and in some adjacent areas. The traditional electric operating companies (including the Company) and Southern Power expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Retail Regulatory Matters
General
In 2012, the Mississippi PSC issued an order for the purpose of investigating and reviewing, for informational purposes only, the ROE formulas used by the Company and all other regulated electric utilities in Mississippi. In 2013, the MPUS filed with the Mississippi PSC its report on the ROE formulas used by the Company and all other regulated electric utilities in Mississippi. The ultimate outcome of this matter cannot be determined at this time.
Performance Evaluation Plan
The Company's retail base rates are set under the PEP, a rate plan approved by the Mississippi PSC. Two filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of theany year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.presented.
In 2011, the Company submitted its annual PEP lookback filing for 2010, which recommended no surcharge or refund. Later in 2011, the Company received a letter from the MPUS disputing certain items in the 2010 PEP lookback filing. In 2012, the Mississippi PSC issued an order canceling the Company's PEP lookback filing for 2011. In 2013, the MPUS contested the Company's PEP lookback filing for 2012, which indicated a refund due to customers of $5 million. Unresolved matters related to the 2010 PEP lookback filing, which remain under review, also impact the 2012 PEP lookback filing.
In 2013, the Mississippi PSC approved the projected PEP filing for 2013, which resulted in a rate increase of 1.9%, or $15 million, annually, effective March 19, 2013. The Company may be entitled to $3 million in additional revenues related to 2013 as a result of the late implementation of the 2013 PEP rate increase.
In 2014, 2015, and 2016, the Company submitted its annual PEP lookback filings for the prior years, which for 2013 and 2014 each indicated no surcharge or refund and for 2015 indicated a $5 million surcharge. On July 12, 2016 and November 15, 2016, the Company submitted its annual projected PEP filings for 2016 and 2017, respectively, which each indicated no change in rates. The Mississippi PSC suspended each of these filings to allow more time for review.
In 2014, the Mississippi PSC issued an order for the purpose of investigating and reviewing the adoption of a uniform formula rate plan for the Company and other regulated electric utilities in Mississippi.
The ultimate outcome of these matters cannot be determined at this time.
Energy Efficiency
In 2013, the Mississippi PSC approved an energy efficiency and conservation rule requiring electric and gas utilities in Mississippi serving more than 25,000 customers to implement energy efficiency programs and standards. Quick Start Plans, which include a portfolio of energy efficiency programs that are intended to provide benefits to a majority of customers, were required to be filed within six months of the order and will be in effect for two to three years.
On May 3, 2016, the Mississippi PSC issued an order approving the Company's Energy Efficiency Cost Rider Compliance filing, which reduced annual retail revenues by approximately $2 million effective with the first billing cycle for June 2016.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

On November 30, 2016, the Company submitted its Energy Efficiency Cost Rider Compliance filing, which included an increase of $1 million in annual retail revenues. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In 2012, the Mississippi PSC approved the Company's request for a CPCN to construct scrubbers on Plant Daniel Units 1 and 2, which were placed in service in November 2015. These units are jointly owned by the Company and Gulf Power, with 50% ownership each. In 2014, the Company entered into a settlement agreement with the Sierra Club that, among other things, required the Sierra Club to dismiss or withdraw all pending legal and regulatory challenges to the issuance of the CPCN to construct scrubbers on Plant Daniel Units 1 and 2, which also occurred in 2014. In addition, and consistent with the Company's ongoing evaluation of recent environmental rules and regulations, the Company agreed to retire, repower with natural gas, or convert to an alternative non-fossil fuel source Plant Sweatt Units 1 and 2 (80 MWs) no later than December 2018 (and the units were retired in July 2016). The Company also agreed that it would cease burning coal and other solid fuel at Plant Watson Units 4 and 5 (750 MWs) and begin operating those units solely on natural gas no later than April 2015 (which occurred in April 2015) and cease burning coal and other solid fuel at Plant Greene County Units 1 and 2 (200 MWs) no later than April 2016 (which occurred in February and March 2016, respectively) and begin operating those units solely on natural gas (which occurred in June and July 2016, respectively).
In accordance with a 2011 accounting order from the Mississippi PSC, the Company has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. As of December 31, 2016, $17 million of Plant Greene County costs have been reclassified as regulatory assets and are expected to be recovered through the ECO plan and other existing cost recovery mechanisms over a period to be determined by the Mississippi PSC. The Mississippi PSC approved $41 million of costs that were reclassified to a regulatory asset associated with Plant Watson for amortization over a five-year period that began in July 2016. As a result, these decisions are not expected to have a material impact on the Company's financial statements.
On August 17, 2016, the Mississippi PSC approved the Company's revised ECO plan filing for 2016, which requested the maximum 2% annual increase in revenues, approximately $18 million, primarily related to the Plant Daniel Units 1 and 2 scrubbers being placed in service in November 2015. The revised rates became effective with the first billing cycle for September 2016. Approximately $22 million of related revenue requirements in excess of the 2% maximum was deferred for inclusion in the 2017 filing.
On February 14, 2017, the Company submitted its ECO plan filing for 2017, which requested an increase in annual revenues over 2016, capped at 2% of total retail revenues, of approximately $18 million, primarily related to the Plant Daniel Units 1 and 2 scrubbers placed in service in November 2015. The revenue requirement in excess of the 2%, approximately $27 million plus carrying costs, will be carried forward to the 2018 filing. The ultimate outcome of this matter cannot be determined at this time.
Fuel Cost Recovery
The Company establishes, annually, a retail fuel cost recovery factor that is approved by the Mississippi PSC. The Company is required to file for an adjustment to the retail fuel cost recovery factor annually. The Mississippi PSC approved the 2016 retail fuel cost recovery factor, effective January 5, 2016, which resulted in an annual revenue decrease of approximately $120 million. On August 17, 2016, the Mississippi PSC approved an additional decrease of $51 million annually in fuel cost recovery rates effective with the first billing cycle for September 2016. At December 31, 2016 and 2015, over recovered retail fuel costs were approximately $37 million and $71 million, respectively, which is included in over recovered regulatory clause liabilities, current in the balance sheets. On January 12, 2017, the Mississippi PSC approved the 2017 retail fuel cost recovery factor, effective February 2017 through January 2018, which will result in an annual revenue increase of approximately $55 million.
The Company's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on the Company's revenues or net income, but will affect cash flow.
Ad Valorem Tax Adjustment
The Company establishes, annually, an ad valorem tax adjustment factor that is approved by the Mississippi PSC to collect the ad valorem taxes paid by the Company. On June 17, 2016, the Mississippi PSC approved the Company's annual ad valorem tax adjustment factor filing for 2016, which included an annual rate decrease of 0.07%, or $1 million in annual retail revenues, primarily due to the prior year over recovery.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

System Restoration Rider
In October 2015, the Mississippi PSC approved the Company's 2015 SRR rate filing, which proposed that the SRR rate remain level at zero and the Company continue to accrue $3 million annually to the property damage reserve.
On February 1, 2016, the Company submitted its 2016 SRR rate filing which proposed no changes to either the SRR rate or the annual property damage reserve accrual. On February 19, 2016, the filing was suspended by the Mississippi PSC for review. The ultimate outcome of this matter cannot be determined at this time.
On February 3, 2017, the Company submitted its 2017 SRR rate filing, which proposed that the rate level remain at zero and the Company be allowed to accrue $4 million annually to the property damage reserve in 2017. The ultimate outcome of this matter cannot be determined at this time.
See Note 1 under "Provision for Property Damage" for additional information.
Storm Damage Cost Recovery
In connection with the damage associated with Hurricane Katrina, the Mississippi PSC authorized the issuance of system restoration bonds in 2006. In accordance with a Mississippi PSC order dated January 24, 2017, the Company has adjusted the System Restoration Charge implemented after Hurricane Katrina to zero. Upon completion of the proper defeasance process by the Mississippi State Bond Commission, the Company's obligations in relation to system restoration bonds issued after Hurricane Katrina in 2005 will be completely satisfied.
Integrated Coal Gasification Combined Cycle
Kemper IGCC Overview
The Kemper IGCC utilizes IGCC technology with an expected output capacity of 582 MWs. The Kemper IGCC is fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by the Company and situated adjacent to the Kemper IGCC. The mine, operated by North American Coal Corporation, started commercial operation in 2013. In connection with the Kemper IGCC, the Company constructed and plans to operate approximately 61 miles of CO2 pipeline infrastructure for the transport of captured CO2 for use in enhanced oil recovery.
Kemper IGCC Schedule and Cost Estimate
In 2012, the Mississippi PSC issued the 2012 MPSC CPCN Order, a detailed order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper IGCC. The certificated cost estimate of the Kemper IGCC included in the 2012 MPSC CPCN Order was $2.4 billion, net of $245 million of Initial DOE Grants and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, and AFUDC related to the Kemper IGCC. The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper IGCC was originally projected to be placed in service in May 2014. The Company placed the combined cycle and the associated common facilities portion of the Kemper IGCC in service in August 2014. The remainder of the plant, including the gasifiers and the gas clean-up facilities, represents first-of-a-kind technology. The initial production of syngas began on July 14, 2016 for gasifier "B" and on September 13, 2016 for gasifier "A." The Company achieved integrated operation of both gasifiers on January 29, 2017, including the production of electricity from syngas in both combustion turbines. The Company subsequently completed a brief outage to repair and make modifications to further improve the plant's ability to achieve sustained operations sufficient to support placing the plant in service for customers. Efforts to reach sustained operation of both gasifiers and production of electricity from syngas in both combustion turbines are in process. The plant has produced and captured CO2, and has produced sulfuric acid and ammonia, all of acceptable quality under the related off-take agreements. On February 20, 2017, the Company determined gasifier "B," which has been producing syngas over 60% of the time since early November 2016, requires an outage to remove ash deposits from its ash removal system. Gasifier "A" and combustion turbine "A" are expected to remain in operation, producing electricity from syngas, as well as producing chemical by-products. As a result, the Company currently expects the remainder of the Kemper IGCC, including both gasifiers, will be placed in service by mid-March 2017.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The Company's Kemper IGCC 2010 project estimate, current cost estimate (which includes the impacts of the Mississippi Supreme Court's (Court) decision discussed herein under "Rate Recovery of Kemper IGCC Costs 2013 MPSC Rate Order"), and actual costs incurred as of December 31, 2016, all of which include 100% of the costs for the Kemper IGCC, are as follows:
Cost Category
2010 Project Estimate(a)
 
Current Cost Estimate(b)
 Actual Costs
 (in billions)
Plant Subject to Cost Cap(c)(e)
$2.40
 $5.64
 $5.44
Lignite Mine and Equipment0.21
 0.23
 0.23
CO2 Pipeline Facilities
0.14
 0.11
 0.11
AFUDC(d)
0.17
 0.79
 0.75
Combined Cycle and Related Assets Placed in
Service – Incremental(e)

 0.04
 0.04
General Exceptions0.05
 0.10
 0.09
Deferred Costs(e)

 0.22
 0.21
Additional DOE Grants(f)

 (0.14) (0.14)
Total Kemper IGCC(g)
$2.97
 $6.99
 $6.73
(a)
The 2010 Project Estimate is the certificated cost estimate adjusted to include the certificated estimate for the CO2 pipeline facilities approved in 2011 by the Mississippi PSC, as well as the lignite mine and equipment, AFUDC, and general exceptions.
(b)Amounts in the Current Cost Estimate include certain estimated post-in-service costs which are expected to be subject to the cost cap.
(c)
The 2012 MPSC CPCN Order approved a construction cost cap of up to $2.88 billion, net of the Initial DOE Grants and excluding the cost of the lignite mine and equipment, the cost of the CO2 pipeline facilities, AFUDC, and certain general exceptions, including change of law, force majeure, and beneficial capital (which exists when the Company demonstrates that the purpose and effect of the construction cost increase is to produce efficiencies that will result in a neutral or favorable effect on customers relative to the original proposal for the CPCN) (Cost Cap Exceptions). The Current Cost Estimate and the Actual Costs include non-incremental operating and maintenance costs related to the combined cycle and associated common facilities placed in service in August 2014 that are subject to the $2.88 billion cost cap and exclude post-in-service costs for the lignite mine. See "Rate Recovery of Kemper IGCC Costs – 2013 MPSC Rate Order" herein for additional information.
(d)
The Company's 2010 Project Estimate included recovery of financing costs during construction rather than the accrual of AFUDC. This approach was not approved by the Mississippi PSC as described in "Rate Recovery of Kemper IGCC Costs – 2013 MPSC Rate Order." The Current Cost Estimate also reflects the impact of a settlement agreement with the wholesale customers for cost-based rates under FERC's jurisdiction. See "FERC Matters" herein for additional information.
(e)Non-capital Kemper IGCC-related costs incurred during construction were initially deferred as regulatory assets. Some of these costs are now included in rates and are being recognized through income; however, such costs continue to be included in the Current Cost Estimate and the Actual Costs at December 31, 2016. The wholesale portion of debt carrying costs, whether deferred or recognized through income, is not included in the Current Cost Estimate and the Actual Costs at December 31, 2016. See "Rate Recovery of Kemper IGCC Costs – Regulatory Assets and Liabilities" herein for additional information.
(f)
On April 8, 2016, the Company received approximately $137 million in Additional DOE Grants, which are expected to be used to reduce future rate impacts for customers.
(g)The Current Cost Estimate and the Actual Costs include $2.76 billion that will not be recovered for costs above the cost cap, $0.83 billion of investment costs included in current rates for the combined cycle and related assets in service, and $0.08 billion of costs that were previously expensed for the combined cycle and related assets in service. The Current Cost Estimate and the Actual Costs exclude $0.25 billion of costs not included in current rates for post-June 2013 mine operations, the lignite fuel inventory, and the nitrogen plant capital lease, which will be included in the 2017 Rate Case to be filed by June 3, 2017. See Note 1 under "Fuel Inventory," Note 6 under "Capital Leases," and "Rate Recovery of Kemper IGCC Costs – 2017 Rate Case" herein for additional information.
Of the total costs, including post-in-service costs for the lignite mine, incurred as of December 31, 2016, $3.67 billion was included in property, plant, and equipment (which is net of the Initial DOE Grants, the Additional DOE Grants, and estimated probable losses of $2.84 billion), $6 million in other property and investments, $75 million in fossil fuel stock, $47 million in materials and supplies, $29 million in other regulatory assets, current, $172 million in other regulatory assets, deferred, $3 million in other current assets, and $14 million in other deferred charges and assets in the balance sheet.
The Company does not intend to seek rate recovery for any costs related to the construction of the Kemper IGCC that exceed the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions. The Company recorded pre-tax charges to income for revisions to the cost estimate of $348 million ($215 million after tax), $365 million ($226 million after tax), and $868 million ($536 million after tax) in 2016, 2015, and 2014, respectively. Since 2012, in the aggregate, the Company has incurred charges of $2.76 billion ($1.71 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through December 31, 2016. The increases to the cost estimate in 2016 primarily reflect $186 million for the

NOTES (continued)
Mississippi Power Company 2016 Annual Report

extension of the Kemper IGCC's projected in-service date from August 31, 2016 to March 15, 2017 and $162 million for increased efforts related to operational readiness and challenges in start-up and commissioning activities, including the cost of repairs and modifications to both gasifiers, mechanical improvements to coal feed and ash management systems, and outage work, as well as certain post-in-service costs expected to be subject to the cost cap.
In addition to the current construction cost estimate, the Company is identifying potential improvement projects that ultimately may be completed subsequent to placing the remainder of the Kemper IGCC in service. If completed, such improvement projects would be expected to enhance plant performance, safety, and/or operations. As of December 31, 2016, approximately $12 million of related potential costs has been included in the estimated loss on the Kemper IGCC. Other projects have yet to be fully evaluated, have not been included in the current cost estimate, and may be subject to the $2.88 billion cost cap.
Any extension of the in-service date beyond mid-March 2017 is currently estimated to result in additional base costs of approximately $25 million to $35 million per month, which includes maintaining necessary levels of start-up labor, materials, and fuel, as well as operational resources required to execute start-up and commissioning activities. Additional costs may be required for remediation of any further equipment and/or design issues identified. Any extension of the in-service date with respect to the Kemper IGCC beyond mid-March 2017 would also increase costs for the Cost Cap Exceptions, which are not subject to the $2.88 billion cost cap established by the Mississippi PSC. These costs include AFUDC, which is currently estimated to total approximately $16 million per month, as well as carrying costs and operating expenses on Kemper IGCC assets placed in service and consulting and legal fees of approximately $3 million per month. For additional information, see "2015 Rate Case" herein.
Further cost increases and/or extensions of the expected in-service date may result from factors including, but not limited to, difficulties integrating the systems required for sustained operations, sustaining nitrogen supply, major equipment failure, unforeseen engineering or design problems including any repairs and/or modifications to systems, and/or operational performance (including additional costs to satisfy any operational parameters ultimately adopted by the Mississippi PSC). Any further changes in the estimated costs of the Kemper IGCC subject to the $2.88 billion cost cap, net of the Initial DOE Grants and excluding the Cost Cap Exceptions, will be reflected in the Company's statements of income and these changes could be material.
Rate Recovery of Kemper IGCC Costs
Given the variety of potential scenarios and the uncertainty of the outcome of future regulatory proceedings with the Mississippi PSC (and any subsequent related legal challenges), the ultimate outcome of the rate recovery matters discussed herein, including the resolution of legal challenges, cannot now be determined but could result in further material charges that could have a material impact on the Company's results of operations, financial condition, and liquidity.
As of December 31, 2016, in addition to the $2.76 billion of costs above the Mississippi PSC's $2.88 billion cost cap that have been recognized as a charge to income, the Company had incurred approximately $1.99 billion in costs subject to the cost cap and approximately $1.46 billion in Cost Cap Exceptions related to the construction and start-up of the Kemper IGCC that are not included in current rates. These costs primarily relate to the following:
Cost CategoryActual Costs
 (in billions)
Gasifiers and Gas Clean-up Facilities$1.88
Lignite Mine Facility0.31
CO2 Pipeline Facilities
0.11
Combined Cycle and Common Facilities0.16
AFUDC0.69
General exceptions0.07
Plant inventory0.03
Lignite inventory0.08
Regulatory and other deferred assets0.12
Subtotal3.45
Additional DOE Grants(0.14)
Total$3.31
Of these amounts, approximately 29% is related to wholesale and approximately 71% is related to retail, including the 15% portion that was previously contracted to be sold to SMEPA. The Company and its wholesale customers have generally agreed to

NOTES (continued)
Mississippi Power Company 2016 Annual Report

the similar regulatory treatment for wholesale tariff purposes as approved by the Mississippi PSC for retail for Kemper IGCC-related costs. See "FERC Matters – Municipal and Rural Associations Tariff" and "Termination of Proposed Sale of Undivided Interest" herein for further information.
Prudence
On August 17, 2016, the Mississippi PSC issued an order establishing a discovery docket to manage all filings related to the prudence of the Kemper IGCC. On October 3, 2016, the Company made a required compliance filing, which included a review and explanation of differences between the Kemper IGCC project estimate set forth in the 2010 CPCN proceedings and the most recent Kemper IGCC project estimate, as well as comparisons of current cost estimates and current expected plant operational parameters to the estimates presented in the 2010 CPCN proceedings for the first five years after the Kemper IGCC is placed in service. Compared to amounts presented in the 2010 CPCN proceedings, operations and maintenance expenses have increased an average of $105 million annually and maintenance capital has increased an average of $44 million annually for the first full five years of operations for the Kemper IGCC. Additionally, while the current estimated operational availability estimates reflect ultimate results similar to those presented in the 2010 CPCN proceedings, the ramp up period for the current estimates reflects a lower starting point and a slower escalation rate. On November 17, 2016, the Company submitted a supplemental filing to the October 3, 2016 compliance filing to present revised non-fuel operations and maintenance expense projections for the first year after the Kemper IGCC is placed in service. This supplemental filing included approximately $68 million in additional estimated operations and maintenance costs expected to be required to support the operations of the Kemper IGCC during that period. The Company will not seek recovery of the $68 million in additional estimated costs from customers if incurred.
The Company expects the Mississippi PSC to address these matters in connection with the 2017 Rate Case.
Economic Viability Analysis
In the fourth quarter 2016, as a part of its Integrated Resource Plan process, the Southern Company system completed its regular annual updated fuel forecast, the 2017 Annual Fuel Forecast. This updated fuel forecast reflected significantly lower long-term estimated costs for natural gas than were previously projected.
As a result of the updated long-term natural gas forecast, as well as the revised operating expense projections reflected in the discovery docket filings discussed above, on February 21, 2017, the Company filed an updated project economic viability analysis of the Kemper IGCC as required under the 2012 MPSC CPCN Order confirming authorization of the Kemper IGCC. The project economic viability analysis measures the life cycle economics of the Kemper IGCC compared to feasible alternatives, natural gas combined cycle generating units, under a variety of scenarios and considering fuel, operating and capital costs, and operating characteristics, as well as federal and state taxes and incentives. The reduction in the projected long-term natural gas prices in the 2017 Annual Fuel Forecast and, to a lesser extent, the increase in the estimated Kemper IGCC operating costs, negatively impact the updated project economic viability analysis.
The Company expects the Mississippi PSC to address this matter in connection with the 2017 Rate Case.
2017 Accounting Order Request
After the remainder of the plant is placed in service, AFUDC equity of approximately $11 million per month will no longer be recorded in income, and the Company expects to incur approximately $25 million per month in depreciation, taxes, operations and maintenance expenses, interest expense, and regulatory costs in excess of current rates. The Company expects to file a request for authority from the Mississippi PSC and the FERC to defer all Kemper IGCC costs incurred after the in-service date that cannot be capitalized, are not included in current rates, and are not required to be charged against earnings as a result of the $2.88 billion cost cap until such time as the Mississippi PSC completes its review and includes the resulting allowable costs in rates. In the event that the Mississippi PSC does not grant the Company's request, these monthly expenses will be charged to income as incurred and will not be recoverable through rates.
2017 Rate Case
The Company continues to believe that all costs related to the Kemper IGCC have been prudently incurred in accordance with the requirements of the 2012 MPSC CPCN Order. The Company also recognizes significant areas of potential challenge during future regulatory proceedings (and any subsequent, related legal challenges) exist. As described further herein and under "Prudence," "Lignite Mine and CO2 Pipeline Facilities," "Termination of Proposed Sale of Undivided Interest," "Bonus Depreciation," "Investment Tax Credits," and "Section 174 Research and Experimental Deduction," these challenges include, but are not limited to, prudence issues associated with capital costs, financing costs (AFUDC), and future operating costs net of chemical revenues; potential operating parameters; income tax issues; costs deferred as regulatory assets; and the15% portion of the project previously contracted to SMEPA.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Legislation to authorize a multi-year rate plan and legislation to provide for alternate financing through securitization of up to $1.0 billion of prudently-incurred costs was enacted into law in 2013. The Company expects to utilize this legislation to securitize prudently-incurred qualifying facility costs in excess of the certificated cost estimate of $2.4 billion. Qualifying facility costs include, but are not limited to, pre-construction costs, construction costs, regulatory costs, and accrued AFUDC. The Court's decision regarding the 2013 MPSC Rate Order did not impact the Company's ability to utilize alternate financing through securitization or the February 2013 legislation.
Although the 2017 Rate Case has not yet been filed and is subject to future developments with either the Kemper IGCC or the Mississippi PSC, consistent with its approach in the 2013 and 2015 rate proceedings in accordance with the law passed in 2013 authorizing multi-year rate plans, the Company is developing both a traditional rate case requesting full cost recovery of the amounts not currently in rates and a rate mitigation plan that together represent the Company's probable filing strategy. The Company also expects that timely resolution of the 2017 Rate Case will likely require a negotiated settlement agreement. In the event an agreement acceptable to both the Company and the MPUS (and other parties) can be negotiated and ultimately approved by the Mississippi PSC, it is reasonably possible that full regulatory recovery of all Kemper IGCC costs will not occur. The impact of such an agreement on the Company's financial statements would depend on the method, amount, and type of cost recovery ultimately excluded. Certain costs, including operating costs, would be recorded to income in the period incurred, while other costs, including investment-related costs, would be charged to income when it is probable they will not be recovered and the amounts can be reasonably estimated. In the event an agreement acceptable to the parties cannot be reached, the Company intends to fully litigate its request for full recovery through the Mississippi PSC regulatory process and any subsequent legal challenges.
The Company has evaluated various scenarios in connection with its processes to prepare the 2017 Rate Case and has recognized an additional $80 million charge to income, which is the estimated minimum probable amount of the $3.31 billion of Kemper IGCC costs not currently in rates that would not be recovered under the probable rate mitigation plan to be filed by June 3, 2017.
2015 Rate Case
On August 13, 2015, the Mississippi PSC approved the Company's request for interim rates, which presented an alternative rate proposal (In-Service Asset Proposal) designed to recover the Company's costs associated with the Kemper IGCC assets that are commercially operational and currently providing service to customers (the transmission facilities, combined cycle, natural gas pipeline, and water pipeline) and other related costs. The interim rates were designed to collect approximately $159 million annually and became effective in September 2015, subject to refund and certain other conditions.
On December 3, 2015, the Mississippi PSC issued the In-Service Asset Rate Order adopting in full a stipulation (2015 Stipulation) entered into between the Company and the MPUS regarding the In-Service Asset Proposal. The In-Service Asset Rate Order provided for retail rate recovery of an annual revenue requirement of approximately $126 million, based on the Company's actual average capital structure, with a maximum common equity percentage of 49.733%, a 9.225% return on common equity, and actual embedded interest costs. The In-Service Asset Rate Order also included a prudence finding of all costs in the stipulated revenue requirement calculation for the in-service assets. The stipulated revenue requirement excluded the costs of the Kemper IGCC related to the 15% undivided interest that was previously projected to be purchased by SMEPA but reserved the Company's right to seek recovery in a future proceeding. See "Termination of Proposed Sale of Undivided Interest" herein for additional information. The Company is required to file the 2017 Rate Case by June 3, 2017.
With implementation of the new rates on December 17, 2015, the interim rates were terminated and, in March 2016, the Company completed customer refunds of approximately $11 million for the difference between the interim rates collected and the permanent rates.
2013 MPSC Rate Order
In January 2013, the Company entered into a settlement agreement with the Mississippi PSC that was intended to establish the process for resolving matters regarding cost recovery related to the Kemper IGCC (2013 Settlement Agreement). Under the 2013 Settlement Agreement, the Company agreed to limit the portion of prudently-incurred Kemper IGCC costs to be included in retail rate base to the $2.4 billion certificated cost estimate, plus the Cost Cap Exceptions, but excluding AFUDC, and any other costs permitted or determined to be excluded from the $2.88 billion cost cap by the Mississippi PSC. In March 2013, the Mississippi PSC issued a rate order approving retail rate increases of 15% effective March 19, 2013 and 3% effective January 1, 2014, which collectively were designed to collect $156 million annually beginning in 2014 (2013 MPSC Rate Order) to be used to mitigate customer rate impacts after the Kemper IGCC is placed in service, based on a mirror CWIP methodology (Mirror CWIP rate).
On February 12, 2015, the Court reversed the 2013 MPSC Rate Order based on, among other things, its findings that (1) the Mirror CWIP rate treatment was not provided for under the Baseload Act and (2) the Mississippi PSC should have determined the prudence of Kemper IGCC costs before approving rate recovery through the 2013 MPSC Rate Order. The Court also found the

NOTES (continued)
Mississippi Power Company 2016 Annual Report

2013 Settlement Agreement unenforceable due to a lack of public notice for the related proceedings. On July 7, 2015, the Mississippi PSC ordered that the Mirror CWIP rate be terminated effective July 20, 2015 and required the fourth quarter 2015 refund of the $342 million collected under the 2013 MPSC Rate Order, along with associated carrying costs of $29 million. The Court's decision did not impact the 2012 MPSC CPCN Order or the February 2013 legislation described above.
Because the 2013 MPSC Rate Order did not provide for the inclusion of CWIP in rate base as permitted by the Baseload Act, the Company continues to record AFUDC on the Kemper IGCC. Through December 31, 2016, AFUDC recorded since the original May 2014 estimated in-service date for the Kemper IGCC has totaled $398 million, which will continue to accrue at approximately $16 million per month until the remainder of the plant is placed in service. The Company has not recorded any AFUDC on Kemper IGCC costs in excess of the $2.88 billion cost cap, except for Cost Cap Exception amounts.
2012 MPSC CPCN Order
The 2012 MPSC CPCN Order included provisions relating to both the Company's recovery of financing costs during the course of construction of the Kemper IGCC and the Company's recovery of costs following the date the Kemper IGCC is placed in service. With respect to recovery of costs following the in-service date of the Kemper IGCC, the 2012 MPSC CPCN Order provided for the establishment of operational cost and revenue parameters including availability factor, heat rate, lignite heat content, and chemical revenue based upon assumptions in the Company's petition for the CPCN. The Company expects the Mississippi PSC to apply operational parameters in connection with the 2017 Rate Case and future proceedings related to the operation of the Kemper IGCC. To the extent the Mississippi PSC determines the Kemper IGCC does not meet the operational parameters ultimately adopted by the Mississippi PSC or the Company incurs additional costs to satisfy such parameters, there could be a material adverse impact on the Company's financial statements. See "Prudence" herein for additional information.
Regulatory Assets and Liabilities
ConsistentThe traditional electric operating companies and natural gas distribution utilities are subject to accounting requirements for the effects of rate regulation. Regulatory assets represent probable future revenues associated with the treatment of non-capitalcertain costs incurred during the pre-construction period, the Mississippi PSC issued an accounting order in 2011 granting the Company the authoritythat are expected to defer all non-capital Kemper IGCC-related costs to a regulatory assetbe recovered from customers through the in-service date,ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
In the event that a portion of a traditional electric operating company's or a natural gas distribution utility's operations is no longer subject to review ofapplicable accounting rules for rate regulation, such costs by the Mississippi PSC. Such costs include, butcompany would be required to write off to income or reclassify to AOCI related regulatory assets and liabilities that are not limited to, carrying costs on Kemper IGCC assets currently placed in service, costs associated with Mississippi PSC and MPUS consultants, prudence costs, legal fees, and operating expenses associated with assets placed in service.
In August 2014, the Company requested confirmation by the Mississippi PSC of the Company's authority to defer all operating expenses associated with the operation of the combined cycle subject to review of such costs by the Mississippi PSC.specifically recoverable through regulated rates. In addition, the traditional electric operating company or natural gas distribution utility would be required to determine if any impairment to other assets, including plant, exists and write down the assets, if impaired, to their fair values. All regulatory assets and liabilities are to be reflected in rates. See Note 2 for additional information including details of regulatory assets and liabilities reflected in the balance sheets for Southern Company, is authorized to accrue carrying coststhe traditional electric operating companies, and Southern Company Gas.
Revenues
The Registrants generate revenues from a variety of sources which are accounted for under various revenue accounting guidance, including ASC 606, lease, derivative, and regulatory accounting. Other than the timing of recognition of guaranteed and fixed billing arrangements at Southern Company Gas, the adoption of ASC 606 in 2018 had no impact on the unamortized balancetiming or amount of such regulatory assetsrevenue recognized under previous guidance. See Note 4 for information regarding the Registrants' adoption of ASC 606 and related disclosures.
Traditional Electric Operating Companies
The majority of the revenues of the traditional electric operating companies are generated from contracts with retail electric customers. Retail revenues recognized under ASC 606 are consistent with prior revenue recognition policies. These revenues, generated from the integrated service to deliver electricity when and if called upon by the customer, are recognized as a single performance obligation satisfied over time, at a tariff rate, and as electricity is delivered to the customer during the month. Unbilled revenues related to retail sales are accrued at the end of each fiscal period. Retail rates may include provisions to adjust billings for fluctuations in fuel costs, fuel hedging, the energy component of purchased power costs, and certain other costs. Revenues are adjusted for differences between these actual costs and amounts billed in current regulated rates. Under or over recovered regulatory clause revenues are recorded in the balance sheets and are recovered from or returned to customers, respectively, through adjustments to the billing factors. See Note 2 for additional information regarding regulatory matters of the traditional electric operating companies.
Wholesale capacity revenues from PPAs are recognized either on a levelized basis over the appropriate contract period or the amount billable under the contract terms. Energy and other revenues are generally recognized as services are provided. The accounting for these revenues under ASC 606 is consistent with prior revenue recognition policies. The contracts for capacity and energy in a mannerwholesale PPA have multiple performance obligations where the contract's total transaction price is allocated to beeach performance obligation based on the standalone selling price. The standalone selling price is primarily determined by the Mississippi PSC in future cost recovery mechanism proceedings. Beginning inprice

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

charged to customers for the third quarter 2015 and the second quarter 2016, in connectionspecific goods or services transferred with the implementation ofperformance obligations. Generally, the traditional electric operating companies recognize revenue as the performance obligations are satisfied over time as electricity is delivered to the customer or as generation capacity is available to the customer.
For both retail and wholesale rates, respectively,revenues, the Company began expensing certain ongoing project coststraditional electric operating companies generally have a right to consideration in an amount that corresponds directly with the value to the customer of the entity's performance completed to date and certain retail debt carrying costs (associated with assets placed in service and other non-CWIP accounts) that previously were deferred as regulatory assets and began amortizing certain regulatory assets associated with assets placed in service and consulting and legal fees. The amortization periods for these regulatory assets vary from two years to 10 years as set forthmay recognize revenue in the In-Service Asset Rate Orderamount to which the entity has a right to invoice and has elected to recognize revenue for its sales of electricity and capacity using the settlement agreement with wholesale customers. As of December 31, 2016,invoice practical expedient. In addition, payment for goods and services rendered is typically due in the balance associated with these regulatory assets was $97 million, of which $29 million is included in current assets. Other regulatory assets associated with the remaindersubsequent month following satisfaction of the Kemper IGCC totaled $104 millionRegistrants' performance obligation.
Southern Power
Southern Power sells capacity and energy at rates specified under contractual terms in long-term PPAs. These PPAs are accounted for as operating leases, non-derivatives, or normal sale derivatives. Capacity revenues from PPAs classified as operating leases are recognized on a straight-line basis over the term of December 31, 2016.the agreement. Energy revenues are recognized in the period the energy is delivered.
Southern Power's non-lease contracts commonly include capacity and energy which are considered separate performance obligations. In these contracts, the total transaction price is allocated to each performance obligation based on the standalone selling price. The amortization period for these assetsstandalone selling price is expected to beprimarily determined by the Mississippi PSCprice charged to customers for the specific goods or services transferred with the performance obligations. Generally, Southern Power recognizes revenue as the performance obligations are satisfied over time, as electricity is delivered to the customer or as generation capacity is made available to the customer.
Southern Power generally has a right to consideration in an amount that corresponds directly with the value to the customer of the entity's performance completed to date and may recognize revenue in the 2017 Rate Case.amount to which the entity has a right to invoice. In addition, payment for goods and services rendered is typically due in the subsequent month following satisfaction of Southern Power's performance obligation.
When multiple contracts exist with the same counterparty, the revenues from each contract are accounted for as separate arrangements.
Southern Power may also enter into contracts to sell short-term capacity in the wholesale electricity markets. These sales are generally classified as mark-to-market derivatives and net unrealized gains and losses on such contracts are recorded in wholesale revenues. See "FERC Matters"Note 14 and "Financial Instruments" herein for additional informationinformation.
Southern Company Gas
Gas Distribution Operations
Southern Company Gas records revenues when goods or services are provided to customers. Those revenues are based on rates approved by the state regulatory agencies of the natural gas distribution utilities. The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. As required by the Georgia PSC, Atlanta Gas Light bills Marketers in equal monthly installments for each residential, commercial, and industrial end-use customer's distribution costs as well as for capacity costs utilizing a seasonal rate design for the calculation of each residential end-use customer's annual straight-fixed-variable charge, which reflects the historic volumetric usage pattern for the entire residential class.
The majority of the revenues of Southern Company Gas are generated from contracts with natural gas distribution customers. Revenues from this integrated service to deliver gas when and if called upon by the customer is recognized as a single performance obligation satisfied over time and is recognized at a tariff rate as gas is delivered to the customer during the month.
The standalone selling price is primarily determined by the price charged to customers for the specific goods or services transferred with the performance obligations. Generally, Southern Company Gas recognizes revenue as the performance obligations are satisfied over time as natural gas is delivered to the customer. The performance obligations related to the 2016 settlement agreement with wholesale customers.
The In-Service Asset Rate Order requires the Company to submit an annual true-up calculation of its actual cost of capital, comparedgas services are satisfied, and revenue is recognized, at a point in time when natural gas is delivered to the stipulated total cost of capital,customer.
Southern Company Gas generally has a right to consideration in an amount that corresponds directly with the first occurring asvalue to the customer of May 31, 2016. At December 31, 2016, the Company's related regulatory liability includedentity's performance completed to date and may recognize revenue in its balance sheet totaled approximately $7 million. See "2015 Rate Case" herein for additional information.
Also see Note 1 under "Regulatory Assets and Liabilities" for additional information.
Lignite Mine and CO2 Pipeline Facilities
In conjunction with the Kemper IGCC,amount to which the Company owns the lignite mine and equipmententity has a right to invoice and has acquiredelected to recognize revenue for its sales of natural gas using the invoice practical expedient. In addition, payment for goods and will continueservices rendered is typically due in the subsequent month following satisfaction of Southern Company Gas' performance obligation.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

With the Kemper IGCC site. The mine startedexception of Atlanta Gas Light, the natural gas distribution utilities have rate structures that include volumetric rate designs that allow the opportunity to recover certain costs based on gas usage. Revenues from sales and transportation services are recognized in the same period in which the related volumes are delivered to customers. Revenues from residential and certain commercial operation in June 2013.
In 2010,and industrial customers are recognized on the Company executed a 40-year management fee contract with Liberty Fuels, which developed, constructed,basis of scheduled meter readings. Additionally, unbilled revenues are recognized for estimated deliveries of gas not yet billed to these customers, from the last bill date to the end of the accounting period. For other commercial and is operatingindustrial customers and managing the mining operations. The contract with Liberty Fuels is effectivefor all wholesale customers, revenues are based on actual deliveries through the end of the mine reclamation. Asperiod.
The tariffs for several of the mining permit holder, Liberty Fuels hasnatural gas distribution utilities include provisions which allow for the recognition of certain revenues prior to the time such revenues are billed to customers. These provisions are referred to as alternative revenue programs and provide for the recognition of certain revenues prior to billing, as long as the amounts recognized will be collected from customers within 24 months of recognition. These programs are as follows:
Weather normalization adjustments – reduce customer bills when winter weather is colder than normal and increase customer bills when weather is warmer than normal and are included in the tariffs for Virginia Natural Gas, Chattanooga Gas, and, prior to its sale, Elizabethtown Gas;
Revenue normalization mechanisms – mitigate the impact of conservation and declining customer usage and are contained in the tariffs for Virginia Natural Gas, Chattanooga Gas, Nicor Gas (effective November 1, 2019), and, prior to its sale, Elkton Gas; and
Revenue true-up adjustment – included within the provisions of the GRAM program in which Atlanta Gas Light participates as a short-term alternative to formal rate case filings, the revenue true-up feature provides for a monthly positive (or negative) adjustment to record revenue in the amount of any variance to budgeted revenues, which are submitted and approved annually as a requirement of GRAM. Such adjustments are reflected in customer billings in a subsequent program year.
Wholesale Gas Services
Southern Company Gas nets revenues from energy and risk management activities with the associated costs. Profits from sales between segments are eliminated and are recognized as goods or services sold to end-use customers. Southern Company Gas records transactions that qualify as derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses on derivatives held for energy trading purposes are presented on a legal obligationnet basis in revenue.
Gas Marketing Services
Southern Company Gas recognizes revenues from natural gas sales and transportation services in the same period in which the related volumes are delivered to perform mine reclamationcustomers and recognizes sales revenues from residential and certain commercial and industrial customers on the basis of scheduled meter readings. Southern Company hasGas also recognizes unbilled revenues for estimated deliveries of gas not yet billed to these customers from the most recent meter reading date to the end of the accounting period. For other commercial and industrial customers and for all wholesale customers, revenues are based on actual deliveries during the period.
Southern Company Gas recognizes revenues on 12-month utility-bill management contracts as the lesser of cumulative earned or cumulative billed amounts. Prior to the sale of Pivotal Home Solutions in 2018, revenues for warranty and repair contracts were recognized on a straight-line basis over the contract term while revenues for maintenance services were recognized at the time such services were performed. See Note 15 under "Southern Company GasSale of Pivotal Home Solutions" for additional information.
Concentration of Revenue
Southern Company, Alabama Power, Georgia Power, Mississippi Power (with the exception of its cost-based MRA electric tariffs described below), and Southern Company Gas each have a diversified base of customers and no single customer or industry comprises 10% or more of each company's revenues.
Mississippi Power serves long-term contracts with rural electric cooperative associations and municipalities located in southeastern Mississippi under cost-based MRA electric tariffs, which are subject to regulation by the FERC. The contracts with these wholesale customers represented 15.7% of Mississippi Power's total operating revenues in 2019 and are generally subject to 10-year rolling cancellation notices. Historically, these wholesale customers have acted as a group and any changes in contractual relationships for one customer are likely to be followed by the other wholesale customers.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Mississippi PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


a contractual obligation to fund all reclamation activities. In addition to the obligation to fund the reclamation activities, the Company currently provides working capital support to Liberty Fuels through cash advances for capital purchases, payroll, and other operating expenses. See Note 1 under "Asset Retirement Obligations and Other CostsSignificant portions of Removal" and "Variable Interest Entities" for additional information.
In addition, the Company has constructed and will operate the CO2 pipeline for the planned transport of captured CO2 for use in enhanced oil recovery. The Company entered into agreements with Denbury Onshore (Denbury) and Treetop Midstream Services, LLC (Treetop),Southern Power's revenues have been derived from certain customers pursuant to which Denbury would purchase 70%PPAs. The following table shows the percentage of total revenues for Southern Power's top three customers for each of the CO2 captured from the Kemper IGCC and Treetop would purchase 30%years presented:
 201920182017
Georgia Power9.0%9.8%11.3%
Duke Energy CorporationN/A
6.8%6.7%
Southern California Edison6.8%6.2%N/A
Morgan Stanley Capital Group4.9%N/A
4.5%

On January 29, 2019, Pacific Gas & Electric Company (PG&E) filed petitions to reorganize under Chapter 11 of the CO2 capturedU.S. Bankruptcy Code. Southern Power, together with its noncontrolling partners, owns 4 solar facilities where PG&E is the energy off-taker for approximately 207 MWs of capacity under long-term PPAs. PG&E is also the transmission provider for these four facilities and two of Southern Power's other solar facilities. At December 31, 2019, Southern Power had outstanding accounts receivables due from the Kemper IGCC. On June 3, 2016, the Company cancelled its contract with Treetop and amended its contract with Denbury to reflect, among other things, Denbury's agreement to purchase 100%PG&E of the CO2 captured from the Kemper IGCC, an initial contract term of 16 years, and termination rights if the Company has not satisfied its contractual obligation to deliver captured CO2 by July 1, 2017, in addition to Denbury's existing termination rights in the event of a change in law, force majeure, or an event of default by the Company. Any termination or material modification of the agreement with Denbury could impact the operations of the Kemper IGCC and result in a material reduction in the Company's revenues to the extent the Company is not able to enter into other similar contractual arrangements or otherwise sequester the CO2 produced. Additionally, sustained oil price reductions could result in significantly lower revenues than the Company originally forecasted to be available to offset customer rate impacts, which could have a material impact on the Company's financial statements.
The ultimate outcome of these matters cannot be determined at this time.
Termination of Proposed Sale of Undivided Interest
In 2010 and as amended in 2012, the Company and SMEPA entered into an agreement whereby SMEPA agreed to purchase a15%undivided interest in the Kemper IGCC (15%Undivided Interest). On May 20, 2015, SMEPA notified the Company of its termination of the agreement. The Company previously received a total of$275$2 million of deposits from SMEPA that were required to be returned to SMEPA with interest. On June 3, 2015, Southern Company, pursuant to its guarantee obligation, returned approximately $301 million to SMEPA. Subsequently, the Company issued a promissory note in the aggregate principal amount of approximately $301 million to Southern Company, which matures on December 1, 2017.
Litigation
On April 26, 2016, a complaint against the Company was filed in Harrison County Circuit Court (Circuit Court) by Biloxi Freezing & Processing Inc., Gulfside Casino Partnership, and John Carlton Dean, which was amended and refiled on July 11, 2016 to include, among other things, Southern Company as a defendant. On August 12, 2016, Southern Company and the Company removed the case to the U.S. District Court for the Southern District of Mississippi. The plaintiffs filed a request to remand the case back to state court, which was granted on November 17, 2016. The individual plaintiff, John Carlton Dean, alleges that the Company and Southern Company violated the Mississippi Unfair Trade Practices Act. All plaintiffs have alleged that the Company and Southern Company concealed, falsely represented, and failed to fully disclose important facts concerning the cost and schedule of the Kemper IGCC and that these alleged breaches have unjustly enriched the Company and Southern Company. The plaintiffs seek unspecified actual damages and punitive damages; ask the Circuit Court to appoint a receiver to oversee, operate, manage, and otherwise control all affairs relating to the Kemper IGCC; ask the Circuit Court to revoke any licenses or certificates authorizing the Company or Southern Company to engage in any business related to the Kemper IGCC in Mississippi;PPAs and seek attorney's fees, costs, and interest. The plaintiffs also seek an injunction to prevent any Kemper IGCC costs from being charged to customers through electric rates. On December 7, 2016, Southern Company and the Company filed motions to dismiss.
On June 9, 2016, Treetop, Greenleaf, Tenrgys, LLC, Tellus Energy, LLC, WCOA, LLC, and Tellus Operating Group filed a complaint against the Company, Southern Company, and SCS in the state court in Gwinnett County, Georgia. The complaint relates$33 million related to the cancelled CO2 contracttransmission interconnections (of which $27 million is classified in receivables – other and $6 million is classified in other deferred charges and assets). Subsequent to December 31, 2019, Southern Power received $15 million in accordance with Treetopa November 2019 bankruptcy court order granting payment of transmission interconnections for amounts due and alleges fraudulent misrepresentation, fraudulent concealment, civil conspiracy,owing. Southern Power continues to evaluate the recoverability of its investments in these solar facilities under various scenarios, including selling the related energy into the competitive markets, and breach of contract on the part of the Company, Southern Company, and SCS and seeks compensatory damages of $100 million, as well as unspecified punitive damages. Southern Company, the Company, and SCS have movedhas concluded that these solar facilities are not impaired. PG&E has continued to compel arbitration pursuant toperform under the terms of the CO2 contract.
The Company believes these legal challenges have no merit; however, an adverse outcome in these proceedings could havePPAs. Southern Power does not expect a material impact onto its financial statements if, as a result of the Company's results of operations, financial condition, and liquidity. The Company will vigorously defend itself in these matters, and the ultimate outcome of these matters cannot be determined at this time.
Baseload Act
In 2008, the Baseload Act was signed by the Governor of Mississippi. The Baseload Act authorizes, butbankruptcy proceedings, PG&E does not require, the Mississippi PSC to adopt a cost recovery mechanism that includes in retail base rates, prior to and during construction, all or a

NOTES (continued)
Mississippi Power Company 2016 Annual Report

portion of the prudently-incurred pre-construction and construction costs incurred by a utility in constructing a base load electric generating plant. Prior to the passage of the Baseload Act, such costs would traditionally be recovered only after the plant was placed in service. The Baseload Act also provides for periodic prudence reviews by the Mississippi PSC and prohibits the cancellation of any such generating plant without the approval of the Mississippi PSC. In the event of cancellation of the construction of the plant without approval of the Mississippi PSC, the Baseload Act authorizes the Mississippi PSC to make a public interest determination as to whether and to what extent the utility will be afforded rate recovery for costs incurred in connection with such cancelled generating plant. See "Rate Recovery of Kemper IGCC Costs" herein for additional information.
Bonus Depreciation
In December 2015, the Protecting Americans from Tax Hikes (PATH) Act was signed into law. Bonus depreciation was extended for qualified property placed in service through 2020. The PATH Act allows for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension of bonus depreciation included in the PATH Act is expected to result in approximately $20 million of positive cash flows for the 2016 tax year, which was not all realized in 2016 due to a projected consolidated net operating loss (NOL) for Southern Company. Dependent upon placing the remainder of the Kemper IGCC in service by December 31, 2017, the Company expects approximately $370 million of positive cash flows from bonus depreciation for the 2017 tax year, which may not all be realized in 2017 due to additional NOL projections for the 2017 tax year. See "Kemper IGCC Schedule and Cost Estimate" herein and Note 5 under "Current and Deferred Income Taxes Net Operating Loss" for additional information. The ultimate outcome of this matter cannot be determined at this time.
Investment Tax Credits
The IRS allocated $133 million (Phase I) and $279 million (Phase II) of Internal Revenue Code Section 48A tax credits to the Company in connection with the Kemper IGCC. These tax credits were dependent upon meeting the IRS certification requirements, including an in-service date no later than May 11, 2014 for the Phase I credits and April 19, 2016 for the Phase II credits. In addition, the capture and sequestration (via enhanced oil recovery) of at least 65% of the CO2 produced by the Kemper IGCC during operationsperform in accordance with the Internal Revenue Code was also a requirementPPAs or the terms of the Phase II credits. As a result of schedule extensions for the Kemper IGCC, the Phase I tax credits were recaptured in 2013 and the Phase II tax credits were recaptured in 2015.
Section 174 Research and Experimental Deduction
Southern Company, on behalf of the Company, has reflected deductions for research and experimental (R&E) expenditures related to the Kemper IGCC in its federal income tax calculations since 2013 and has filed amended federal income tax returns for 2008 through 2013 to also include such deductions. The Kemper IGCC is based on first-of-a-kind technology, and Southern Company believes that a significant portion of the plant costs qualify as deductible R&E expenditures under Internal Revenue Code Section 174. In December 2016, Southern Company and the IRS reached a proposed settlement, subject to approval of the U.S. Congress Joint Committee on Taxation, resolving a methodology for these deductions. Due to the uncertainty related to this tax position, the Company had unrecognized tax benefits associated with these R&E deductions totaling approximately $464 million as of December 31, 2016. See Note 5 under "Unrecognized Tax Benefits" for additional information. This matter is expected to be resolved in the next 12 months;PPAs are renegotiated; however, the ultimate outcome of this matter cannot be determined at this time.
Fuel Costs
4. JOINT OWNERSHIP AGREEMENTS
The CompanyFuel costs for the traditional electric operating companies and Southern Power are expensed as the fuel is used. Fuel expense generally includes fuel transportation costs and the cost of purchased emissions allowances as they are used. For Alabama Power own,and Georgia Power, fuel expense also includes the amortization of the cost of nuclear fuel. For the traditional electric operating companies, fuel costs also include gains and/or losses from fuel-hedging programs as tenants in common, Units 1 and 2 (total capacityapproved by their respective state PSCs.
Cost of 500 MWs) at Greene County Steam Plant,Natural Gas
Excluding Atlanta Gas Light, which is located in Alabama and operated by Alabama Power. Additionally, thedoes not sell natural gas to end-use customers, Southern Company and Gulf Power, own as tenants in common, Units 1 and 2 (total capacity of 1,000 MWs) at Plant Daniel, which is located in Mississippi and operatedGas charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the Company. At December 31, 2016,applicable state regulatory agencies. Under these mechanisms, all prudently-incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Southern Company Gas defers or accrues the Company's percentage ownershipdifference between the actual cost of natural gas and investmentthe amount of commodity revenue earned in a given period such that no operating income is recognized related to these jointly-owned facilities in commercial operation were as follows:
Generating
Plant
Company
Ownership
 Plant in Service 
Accumulated
Depreciation
 CWIP
   (in millions)  
Greene County       
Units 1 and 240% $165
 $48
 $
Daniel       
Units 1 and 250% $695
 $173
 $15

The Company's proportionate share of plant operating expenses iscustomers prospectively through adjustments to the commodity rate. Deferred and accrued natural gas costs are included in the statements of operationsbalance sheets as regulatory assets and the Company is responsible for providing its own financing.regulatory liabilities, respectively.
5. INCOME TAXES
On behalf of the Company, Southern Company files a consolidated federal income tax return and various combined and separate state income tax returns. Under a joint consolidated income tax allocation agreement, eachGas' gas marketing services' customers are charged for actual or estimated natural gas consumed. Within cost of natural gas, Southern Company subsidiary's currentGas also includes costs of lost and deferred tax expense is computed on a stand-alone basisunaccounted for gas, adjustments to reduce the value of inventories to market value, and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordancegains and losses associated with IRS regulations, each company is jointly and severally liable for the federal tax liability.certain derivatives.
Current and Deferred Income Taxes
DetailsThe Registrants use the liability method of accounting for deferred income taxes and provide deferred income taxes for all significant income tax provisions are as follows:
 2016 2015 2014
 (in millions)
Federal —     
Current$(31) $(768) $(431)
Deferred(60) 704
 183
 (91) (64) (248)
State —     
Current(6) (81) 1
Deferred(7) 73
 (38)
 (13) (8) (37)
Total$(104) $(72) $(285)

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 2016 2015
 (in millions)
Deferred tax liabilities —   
Accelerated depreciation$386
 $1,618
Property basis difference852
 
Regulatory assets associated with AROs72
 71
Pensions and other benefits49
 30
Regulatory assets associated with employee benefit obligations70
 66
Regulatory assets associated with the Kemper IGCC82
 86
Rate differential144
 115
Other125
 176
Total1,780
 2,162
Deferred tax assets —   
Fuel clause over recovered26
 51
Estimated loss on Kemper IGCC484
 451
Pension and other benefits96
 92
Federal NOL109
 17
Property insurance27
 25
Premium on long-term debt14
 18
AROs72
 71
Property basis difference
 451
Deferred state tax assets113
 152
Deferred federal tax assets31
 31
Federal effect of state deferred taxes19
 8
Other33
 33
Total1,024
 1,400
Total deferred tax liabilities, net756
 762
Accumulated deferred income taxes$756
 $762
The application of bonus depreciation provisions in current tax law significantly increased deferred tax liabilities related to accelerated depreciation.
At December 31, 2016, the tax-related regulatory assets were $362 million. These assets are primarily attributable to tax benefits flowed through to customers in prior years, deferred taxes previously recognized at rates lower than the current enacted tax law, and taxes applicable to capitalized interest.
At December 31, 2016, the tax-related regulatory liabilities were $7 million. These liabilities are primarily attributable to deferred taxes previously recognized at rates higher than the current enacted tax law and unamortized ITCs.
differences. In accordance with regulatory requirements, deferred federal ITCs for the traditional electric operating companies are deferred and amortized over the average life of the related property, with such amortization normally applied as a credit to reduce depreciation and amortization in the statements of operations. Creditsincome. Southern Power's and the natural gas distribution utilities' deferred federal ITCs, as well as certain state ITCs for non-Kemper IGCCNicor Gas, are deferred and amortized to income tax expense over the life of the respective asset.
Under current tax law, certain projects at Southern Power related to the construction of renewable facilities are eligible for federal ITCs. Southern Power estimates eligible costs which, as they relate to acquisitions, may not be finalized until the allocation of the purchase price to assets has been finalized. Southern Power applies the deferred method to ITCs. Under the deferred method, the ITCs are recorded as a deferred credit and amortized in this manner amounted to $1 million in eachincome tax expense over the life of 2016, 2015, and 2014.
At December 31, 2016, the Company had staterespective asset. Furthermore, the tax basis of Mississippi NOL carryforwards totaling approximately $3 billion,the asset is reduced by 50% of the ITCs received, resulting in a net deferred tax assets of approximately $112 million. The NOLs will expire between 2032 and 2037.asset. Southern Power has elected to


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Mississippi PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report


Effective Tax Rate
A reconciliationrecognize the tax benefit of the federal statutory income tax ratethis basis difference as a reduction to the effective income tax rate is as follows:
 2016 2015 2014
Federal statutory rate(35.0)% (35.0)% (35.0)%
State income tax, net of federal deduction(5.7) (6.3) (4.0)
Non-deductible book depreciation0.7
 1.3
 0.1
AFUDC-equity(28.5) (49.6) (7.8)
Other
 (2.9) 0.1
Effective income tax rate (benefit rate)(68.5)% (92.5)% (46.6)%
The decrease in the Company's 2016 effective tax rate (benefit rate), as compared to 2015, is primarily due to an increase in estimated losses associated with the Kemper IGCC and an increase in non-taxable AFUDC equity. The increase in the Company's 2015 effective tax rate (benefit rate), as compared to 2014, is primarily due to a decrease in estimated losses associated with the Kemper IGCC, partially offset by a decrease in non-taxable AFUDC equity.
On March 30, 2016, the FASB issued ASU 2016-09, which changes the accounting for income taxes for share-based payment award transactions. Entities are required to recognize all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation as income tax expense orin the year in which the plant reaches commercial operation. State ITCs are recognized as an income tax benefit in the period in which the credits are generated. In addition, certain projects are eligible for federal and state PTCs, which are recognized as an income statement. tax benefit based on KWH production.
Federal ITCs and PTCs, as well as state ITCs and other state tax credits available to reduce income taxes payable, were not fully utilized in 2019 and will be carried forward and utilized in future years. In addition, Southern Company is expected to have various state net operating loss (NOL) carryforwards for certain of its subsidiaries, which would result in income tax benefits in the future, if utilized. See Note 10 under "Current and Deferred Income TaxesTax Credit Carryforwards" and " Net Operating Loss Carryforwards" for additional information.
The adoptionRegistrants recognize tax positions that are "more likely than not" of ASU 2016-09 did not have a material impactbeing sustained upon examination by the appropriate taxing authorities. See Note 10 under "Unrecognized Tax Benefits" for additional information.
Other Taxes
Taxes imposed on and collected from customers on behalf of governmental agencies are presented net on the Company's overall effective tax rate. See Note 1Registrants' statements of income and are excluded from the transaction price in determining the revenue related to contracts with a customer accounted for under "Recently Issued Accounting Standards"ASC 606.
Southern Company Gas is taxed on its gas revenues by various governmental authorities, but is allowed to recover these taxes from its customers. Revenue taxes imposed on the natural gas distribution utilities are recorded at the amount charged to customers, which may include a small administrative fee, as operating revenues, and the related taxes imposed on Southern Company Gas are recorded as operating expenses on the statements of income. Revenue taxes included in operating expenses were $114 million, $111 million, and $98 million in 2019, 2018, and 2017, respectively.
Allowance for additional information.
Unrecognized Tax Benefits
Changes during the year in unrecognized tax benefits were as follows:
 2016 2015 2014
 (in millions)
Unrecognized tax benefits at beginning of year$421
 $165
 $4
Tax positions increase from current periods26
 32
 58
Tax positions increase from prior periods18
 224
 103
Balance at end of year$465
 $421
 $165
Funds Used During Construction and Interest Capitalized
The tax positions increases from current periodstraditional electric operating companies and prior periods for 2016, 2015 and 2014 relate to deductions for R&E expenditures associatedthe natural gas distribution utilities, with the Kemper IGCC. See "Section 174 Researchexception of Elizabethtown Gas and Experimental Deduction" hereinElkton Gas prior to their sales, record AFUDC, which represents the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the service life of the asset through a higher rate base and higher depreciation. The equity component of AFUDC is not taxable.
Interest related to financing the construction of new facilities at Southern Power and new facilities not included in the traditional electric operating companies' and Southern Company Gas' regulated rates is capitalized in accordance with standard interest capitalization requirements.
Total AFUDC and interest capitalized for additional information.
The impact on the Company's effective tax rate, if recognized, is as follows:
 2016 2015 2014
 (in millions)
Tax positions impacting the effective tax rate$1
 $(2) $4
Tax positions not impacting the effective tax rate464
 423
 161
Balance of unrecognized tax benefits$465
 $421
 $165
The tax positions not impacting the effective tax rate relate to deductions for R&E expenditures associated with the Kemper IGCC. See "Section 174 ResearchRegistrants in 2019, 2018, and Experimental Deduction" herein for additional information.
Accrued interest for unrecognized tax benefits2017 was as follows:
 2016 2015 2014
 (in millions)
Interest accrued at beginning of year$13
 $3
 $1
Interest accrued during the year15
 10
 2
Balance at end of year$28
 $13
 $3

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The Company classifies interest on tax uncertainties as interest expense. The Company did not accrue any penalties on uncertain tax positions.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. The settlement of federal and state audits and U.S. Congress Joint Committee on Taxation approval of the R&E expenditures associated with the Kemper IGCC could impact the balances significantly. At this time, an estimate of the range of reasonably possible outcomes cannot be determined. See "Section 174 Research and Experimental Deduction" herein for additional information.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2012. Southern Company has filed its 2013, 2014, and 2015 federal income tax returns and has received partial acceptance letters from the IRS; however, the IRS has not finalized its audits. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for the Company's state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2011.
Section 174 Research and Experimental Deduction
Southern Company, on behalf of the Company, reflected deductions for R&E expenditures related to the Kemper IGCC in its federal income tax calculations since 2013 and filed amended federal income tax returns for 2008 through 2013 to also include such deductions.
The Kemper IGCC is based on first-of-a-kind technology, and Southern Company and the Company believe that a significant portion of the plant costs qualify as deductible R&E expenditures under Internal Revenue Code Section 174. In December 2016, Southern Company and the IRS reached a proposed settlement, subject to approval of the U.S. Congress Joint Committee on Taxation, resolving a methodology for these deductions. Due to the uncertainty related to this tax position, the Company had unrecognized tax benefits associated with these R&E deductions totaling approximately $464 million and associated interest of $28 million as of December 31, 2016. This matter is expected to be resolved in the next 12 months; however, the ultimate outcome of this matter cannot be determined at this time. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.
6. FINANCING
Going Concern
As of December 31, 2016, the Company's current liabilities exceeded current assets by approximately $371 million primarily due to $551 million in promissory notes to Southern Company which mature in December 2017, $35 million in senior notes which mature in November 2017, and $63 million in short-term debt. The Company expects the funds needed to satisfy the promissory notes to Southern Company will exceed amounts available from operating cash flows, lines of credit, and other external sources. Accordingly, the Company intends to satisfy these obligations through loans and/or equity contributions from Southern Company. Specifically, the Company has been informed by Southern Company that, in the event sufficient funds are not available from external sources, Southern Company intends to (i) extend the maturity of the $551 million in promissory notes and (ii) provide Mississippi Power with loans and/or equity contributions sufficient to fund the remaining indebtedness scheduled to mature and other cash needs over the next 12 months. Therefore, the Company's financial statement presentation contemplates continuation of the Company as a going concern as a result of Southern Company's anticipated ongoing financial support of the Company, consistent with the requirements of ASU 2014-15. See Note 1 under "Recently Issued Accounting Standards" for additional information regarding ASU 2014-15.
Parent Company Loans and Equity Contributions
On January 28, 2016, the Company issued a promissory note for up to $275 million to Southern Company, which matures in December 2017, bearing interest based on one-month LIBOR. During 2016, the Company borrowed $100 million under this promissory note and an additional $100 million under a separate promissory note issued to Southern Company in November 2015.
On June 27, 2016, the Company received a capital contribution from Southern Company of $225 million, the proceeds of which were used to repay to Southern Company a portion of the promissory note issued in November 2015. Also, on December 14, 2016, the Company received a capital contribution from Southern Company of $400 million, the proceeds of which were used for general corporate purposes. As of December 31, 2016 and 2015, the amount of outstanding promissory notes to Southern Company totaled $551 million and $576 million, respectively.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Bank Term Loans
In March 2016, the Company entered into an unsecured term loan agreement with a syndicate of financial institutions for an aggregate amount of $1.2 billion. The Company borrowed $900 million in March 2016 under the term loan agreement and the remaining $300 million in October 2016. The Company used the initial proceeds to repay $900 million in maturing bank loans in March 2016 and the remaining $300 million to repay at maturity the Company's Series 2011A 2.35% Senior Notes due October 15, 2016. The term loan pursuant to this agreement matures on April 1, 2018 and bears interest based on one-month LIBOR.
This bank loan has a covenant that limits debt levels to 65% of total capitalization, as defined in the agreement. For purposes of this definition, debt excludes any long-term debt payable to affiliated trusts, other hybrid securities, and any securitized debt relating to the securitization of certain costs of the Kemper IGCC. At December 31, 2016, the Company was in compliance with its debt limit.
At December 31, 2016, the Company had a total of $1.2 billion in bank loans outstanding. At December 31, 2015, the Company had a total of $900 million in bank loans outstanding, including $475 million classified as notes payable and $425 million classified as securities due within one year.
Senior Notes
At December 31, 2016 and 2015, the Company had $790 million and $1.1 billion of senior notes outstanding, respectively, which included senior notes due within one year. These senior notes are effectively subordinated to the secured debt of the Company. See "Plant Daniel Revenue Bonds" below for additional information regarding the Company's secured indebtedness.
Plant Daniel Revenue Bonds
In 2011, in connection with the Company's election under its operating lease of Plant Daniel Units 3 and 4 to purchase the assets, the Company assumed the obligations of the lessor related to $270 million aggregate principal amount of Mississippi Business Finance Corporation Taxable Revenue Bonds, 7.13% Series 1999A due October 20, 2021, issued for the benefit of the lessor. These bonds are secured by Plant Daniel Units 3 and 4 and certain related personal property. The bonds were recorded at fair value as of the date of assumption, or $346 million, reflecting a premium of $76 million. See "Assets Subject to Lien" herein for additional information.
Securities Due Within One Year
A summary of scheduled maturities and redemptions of securities due within one year at December 31, 2016 and 2015 was as follows:
 2016 2015
 (in millions)
Parent company loans$551
 $
Senior notes35
 300
Bank term loans
 425
Pollution control revenue bonds(*)
40
 
Capitalized leases3
 3
Outstanding at December 31$629
 $728
 Southern CompanyAlabama
Power
Georgia
Power
(*)
Mississippi
Power
Southern
Power
Southern Company Gas
 (in millions)
2019$202
$71
$103
$
$15
$13
2018210
84
94

17
14
2017249
54
63
72
11
19
(*)Pollution control revenue bonds are classified as short term since they are variable
See Note 2 under "Georgia PowerNuclear Construction" for information on the inclusion of a portion of construction costs related to Plant Vogtle Units 3 and 4 in Georgia Power's rate demand obligations that are supported by short-term credit facilities; however, the final maturity date is in 2028.base.
Maturities through 2021 applicable to total long-term debt are as follows: $629 million in 2017, $1.2 billion in 2018, $128 million in 2019, $10 million in 2020, and $274 million in 2021.
Pollution Control Revenue Bonds
Pollution control obligations represent loans to the Company from public authorities of funds derived from sales by such authorities of pollution control revenue bonds issued to finance pollution control and solid waste disposal facilities. The Company is required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. The amount of tax-exempt pollution control revenue bonds outstanding at December 31, 2016 and 2015 was $83 million.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Mississippi PowerSouthern Company 2016and Subsidiary Companies 2019 Annual Report

Other Revenue Bonds
Other revenue bond obligations represent loans to the Company from a public authority of funds derived from the sale by such authority of revenue bonds issued to finance a portion of the costs of constructing the Kemper IGCC and related facilities.
The Company had $50 million of such obligations outstanding related to tax-exempt revenue bonds at December 31, 2016average AFUDC composite rates for 2019, 2018, and 2015. Such amounts are reflected in the statements of capitalization as long-term senior notes and debt.
Capital Leases
In 2013, the Company entered into an agreement to sell the air separation unit2017 for the Kemper IGCCtraditional electric operating companies and also entered into a 20-year nitrogen supply agreement. The nitrogen supply agreement was determined to be a sale/leaseback agreement which resulted in a capital lease obligation at December 31, 2016 and 2015 of $74 million and $77 million, respectively, with an annual interest rate of 4.9% for both years. There are no contingent rentals in the contract and a portion of the monthly payment specified in the agreement is related to executory costs for the operation and maintenance of the air separation unit and excluded from the minimum lease payments. The minimum lease payments for 2016natural gas distribution utilities were $7 million and will be $7 million each year thereafter. Amortization of the capital lease asset for the air separation unit will begin when the Kemper IGCC is placed in service. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information regarding the Kemper IGCC.
Assets Subject to Lien
The revenue bonds assumed in conjunction with the purchase of Plant Daniel Units 3 and 4 are secured by Plant Daniel Units 3 and 4 and certain related personal property. There are no agreements or other arrangements among the Southern Company system companies under which the assets of one company have been pledged or otherwise made available to satisfy the obligations of Southern Company or another of its other subsidiaries. See "Plant Daniel Revenue Bonds" herein for additional information.
Outstanding Classes of Capital Stock
The Company currently has preferred stock (including depositary shares which represent one-fourth of a share of preferred stock) and common stock authorized and outstanding. The preferred stock of the Company contains a feature that allows the holders to elect a majority of the Company's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of the Company, this preferred stock is presented as "Cumulative Redeemable Preferred Stock" in a manner consistent with temporary equity under applicable accounting standards. The Company's preferred stock and depositary preferred stock, without preference between classes, rank senior to the Company's common stock with respect to payment of dividends and voluntary or involuntary dissolution. The preferred stock and depositary preferred stock is subject to redemption at the option of the Company at a redemption price equal to 100% of the liquidation amount of the stock. Information for each outstanding series is in the table below:follows:
 201920182017
Alabama Power8.4%8.3%8.3%
Georgia Power(*)
6.9%7.3%5.6%
Mississippi Power7.3%3.3%6.7%
Southern Company Gas:   
Atlanta Gas Light7.8%7.9%8.1%
Chattanooga Gas7.1%7.4%7.4%
Nicor Gas2.3%2.1%1.2%
Preferred StockPar Value/Stated Capital Per Share Shares Outstanding Redemption Price Per Share
4.40% Preferred Stock$100
 8,867
 $104.32
4.60% Preferred Stock$100
 8,643
 $107.00
4.72% Preferred Stock$100
 16,700
 $102.25
5.25% Preferred Stock(*)
$100
 300,000
 $100.00

(*)There are 1,200,000 outstanding depositary shares, each representing one-fourth
Excludes AFUDC related to the construction of a share of the 5.25% preferred stock.Plant Vogtle Units 3 and 4. See Note 2 under "Georgia PowerNuclear Construction" for additional information.
Dividend RestrictionsImpairment of Long-Lived Assets
The Company can only pay dividends to Southern Company outRegistrants evaluate long-lived assets and finite-lived intangible assets for impairment when events or changes in circumstances indicate that the carrying value of retained earnings or paid-in-capital.

Bank Credit Arrangements
At December 31, 2016, committed credit arrangements with banks were as follows:
Expires     
Executable
Term Loans
 Expires Within One Year
2017 Total Unused 
One
Year
 
Two
Years
 Term Out No Term Out
(in millions) (in millions) (in millions) (in millions)
$173 $173 $150 $— $13 $13 $160
Subject to applicable market conditions, the Company expects to renew its bank credit arrangements, as needed, prior to expiration. In connection therewith, the Company may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
Most of these bank credit arrangements require payment of commitment feeswhether an impairment has occurred is based on either a specific regulatory disallowance, a sales transaction price that is less than the unused portionsasset group's carrying value, or an estimate of undiscounted future cash flows attributable to the asset group, as compared with the carrying value of the commitments or to maintain compensating balances with the banks. Commitment fees average less than 1/4 of 1% for the Company. Compensating balances are not legally restricted from withdrawal.
Most of these bank credit arrangements contain covenants that limit the Company's debt levels to 65% of total capitalization, as defined in the agreements. For purposes of these definitions, debt excludes certain hybrid securities and any securitized debt relating to the securitization of certain costs of the Kemper IGCC.
A portion of the $150 million unused credit with banks is allocated to provide liquidity support to the Company's pollution control revenue bonds and its commercial paper borrowings. The amount of variable rate pollution control revenue bonds outstanding requiring liquidity support as of December 31, 2016 was $40 million.
At December 31, 2016 and 2015, there was no commercial paper debt outstanding.
At December 31, 2016 and 2015, there was $23 million and $500 million, respectively, of short-term debt outstanding.
7. COMMITMENTS
Fuel and Purchased Power Agreements
To supply a portion of the fuel requirements of its generating plants, the Companyassets. If an impairment has entered into various long-term commitments for the procurement and delivery of fossil fuel which are not recognized on the balance sheets. In 2016, 2015, and 2014, the Company incurred fuel expense of $343 million, $443 million, and $574 million, respectively, the majority of which was purchased under long-term commitments. The Company expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
Coal commitments include a management fee associated with a 40-year management contract with Liberty Fuels related to the Kemper IGCC with the remaining amount as of December 31, 2016 of $41 million. Additional commitments for fuel will be required to supply the Company's future needs.
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the Company and all of the other traditional electric operating companies and Southern Power. Under these agreements, each of the traditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with the Company and each of the other traditional electric operating companies to ensure the Company will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.
Operating Leases
The Company has operating lease agreements with various terms and expiration dates. Total rent expense was $3 million, $5 million, and $10 million for 2016, 2015, and 2014, respectively.
The Company and Gulf Power have jointly entered into operating lease agreements for aluminum railcars for the transportation of coal at Plant Daniel. The Company has the option to purchase the railcars at the greater of lease termination value or fair market value or to renew the leases at the end of the lease term. The Company has one remaining operating lease which has 229 aluminum railcars. The Company and Gulf Power also have separate lease agreements for other railcars that do not contain a purchase option.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

The Company's 50% share of the lease costs, charged to fuel stock and recovered through the fuel cost recovery clause, was $2 million in 2016, $2 million in 2015, and $3 million in 2014. The Company's annual railcar lease payments for 2017 will be approximately $1 million. Lease obligations for the period 2018 and thereafter are immaterial.
In addition to railcar leases, the Company has other operating leases for fuel handling equipment at Plant Daniel. The Company's 50% share of the leases for fuel handling was charged to fuel handling expense annually from 2014 through 2016; however, those amounts were immaterial for the reporting period. The Company's annual lease payments through 2020 are expected to be immaterial for fuel handling equipment.
8. STOCK COMPENSATION
Stock-Based Compensation
Stock-based compensation primarily in the form of Southern Company performance share units may be granted through the Omnibus Incentive Compensation Plan to a large segment of the Company's employees ranging from line management to executives. As of December 31, 2016, there were 220 current and former employees participating in the stock option and performance share unit programs.
Stock Options
Through 2009, stock-based compensation granted to employees consisted exclusively of non-qualified stock options. The exercise price for stock options granted equaled the stock price of Southern Company common stock on the date of grant. Stock options vest on a pro rata basis over a maximum period of three years from the date of grant or immediately upon the retirement or death of the employee. Options expire no later than 10 years after the grant date. All unvested stock options vest immediately upon a change in control where Southern Company is not the surviving corporation. Compensation expense is generally recognized on a straight-line basis over the three-year vesting period with the exception of employees that are retirement eligible at the grant date and employees that will become retirement eligible during the vesting period. Compensation expense in those instances is recognized at the grant date for employees that are retirement eligible and through the date of retirement eligibility for those employees that become retirement eligible during the vesting period. In 2015, Southern Company discontinued the granting of stock options.
The weighted average grant-date fair value of stock options granted during 2014 derived using the Black-Scholes stock option pricing model was $2.20.
The compensation cost related to the grant of Southern Company stock options to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. Compensation cost and related tax benefits recognized in the Company's financial statements were not material for any year presented. As of December 31, 2016,occurred, the amount of unrecognized compensation cost related to stock option awards not yet vested was immaterial.
The total intrinsic value of options exercised during the years ended December 31, 2016, 2015, and 2014 was $4 million, $3 million, and $5 million, respectively. No cash proceeds are received by the Company upon the exercise of stock options. The actual tax benefit realized by the Company for the tax deductions from stock option exercises totaled $2 million, $1 million, and $2 million for the years ended December 31, 2016, 2015, and 2014, respectively. Prior to the adoption of ASU 2016-09, the excess tax benefits related to the exercise of stock options wereimpairment recognized in the Company's financial statements with a credit to equity. Upon the adoption of ASU 2016-09, beginning in 2016, all tax benefits related to the exercise of stock options are recognized in income. As of December 31, 2016, the aggregate intrinsic value for the options outstanding and options exercisable was $6 million and $5 million, respectively.
Performance Share Units
From 2010 through 2014, stock-based compensation granted to employees included performance share units in addition to stock options. Beginning in 2015, stock-based compensation consisted exclusively of performance share units. Performance share units granted to employees vest at the end of a three-year performance period. All unvested performance share units vest immediately upon a change in control where Southern Company is not the surviving corporation. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of performance share units granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
The performance goal for all performance share units issued from 2010 through 2014 was based on the total shareholder return (TSR) for Southern Company common stock during the three-year performance period as compared to a group of industry peers.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

For these performance share units, at the end of three years, active employees receive shares based on Southern Company's performance while retired employees receive a pro rata number of shares based on the actual months of service during the performance period prior to retirement. The fair value of TSR-based performance share unit awards is determined asby either the amount of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among the industry peers over the performance period. The Company recognizes compensation expense on a straight-line basis over the three-year performance period without remeasurement.
Beginning in 2015, Southern Company issued two additional types of performance share units to employees in addition to the TSR-based awards. These included performance share units with performance goals based on cumulative earnings per share (EPS) over the performance period and performance share units with performance goals based on Southern Company's equity-weighted ROE over the performance period. The EPS-based and ROE-based awards each represent 25% of total target grant date fair value of the performance share unit awards granted. The remaining 50% of the target grant date fair value consists of TSR-based awards. In contrast to the Monte Carlo simulation model used to determineregulatory disallowance or by estimating the fair value of the TSR-based awards,assets and recording a loss if the carrying value is greater than the fair valuesvalue. For assets identified as held for sale, the carrying value is compared to the estimated fair value less the cost to sell in order to determine if an impairment loss is required. Until the assets are disposed of, their estimated fair value is re-evaluated when circumstances or events change. See Note 3 under "Other MattersSouthern Company" and " – Southern Company Gas" and Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for information regarding impairment charges recorded in 2019 and Note 15 under "Southern Power" for information regarding impairment charges recorded at Southern Power in 2018. Also see "Revenues" herein for additional information.
Goodwill and Other Intangible Assets and Liabilities
Southern Power's intangible assets consist primarily of certain PPAs acquired, which are amortized over the term of the EPS-based awards and the ROE-based awards are based on the closing stock price ofrespective PPA. Southern Company common stock onGas' goodwill and other intangible assets and liabilities primarily relate to its 2016 acquisition by Southern Company. In addition to these items, Southern Company's goodwill and other intangible assets also relate to its 2016 acquisition of PowerSecure.
Goodwill is not amortized, but is subject to an annual impairment test during the datefourth quarter of each year, or more frequently if impairment indicators arise, as discussed below. Southern Company and Southern Company Gas each evaluated its goodwill in the fourth quarter 2019 and determined no additional impairment was required.
A goodwill impairment charge of $32 million was recorded in the second quarter 2019 in contemplation of the grant. Compensation expense forJuly 22, 2019 sale of PowerSecure's utility infrastructure services business. In the EPS-based and ROE-based awards is generally recognized ratably over the three-year performance period initially assuming a 100% payout at the endthird quarter 2019, impairment charges of the performance period. The TSR-based performance share units, along with the EPS-based and ROE-based awards, vest immediately upon the retirement of the employee. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. The expected payout related to the EPS-based and ROE-based awards is reevaluated annually with expense recognized to date increased or decreased based on the number of shares currently expected to be issued. Unlike the TSR-based awards, the compensation expense ultimately recognized for the EPS-based awards and the ROE-based awards will be based on the actual number of shares issued at the end of the performance period.
For the years ended December 31, 2016, 2015, and 2014, employees of the Company were granted performance share units of 62,435, 53,909, and 49,579, respectively. The weighted average grant-date fair value of TSR-based performance share units granted during 2016, 2015, and 2014, determined using a Monte Carlo simulation model to estimate the TSR of Southern Company's stock among the industry peers over the performance period, was $45.17, $46.41, and $37.54, respectively. The weighted average grant-date fair value of both EPS-based and ROE-based performance share units granted during 2016 and 2015 was $48.84 and $47.77, respectively.
For the years ended December 31, 2016, 2015, and 2014, total compensation cost for performance share units recognized in income was $4 million, $4 million, and $2 million, respectively, with the related tax benefit also recognized in income of $1 million, $2 million and $1$3 million respectively. The compensation cost relatedwere recorded to the grantgoodwill and other intangible assets, net, respectively, in contemplation of Southern Company performance share units to the Company's employees is recognized in the Company's financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. As of December 31, 2016, $1 million2019 sale of total unrecognized compensation cost related to performance share award units will be recognized over a weighted-average period of approximately 22 months.
9. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of the Company of what a market participant would use in pricing an asset or liability. If there is little available market data, then the Company's own assumptions are the best available information.
In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

As of December 31, 2016, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Energy-related derivatives$
 $3
 $
 $3
Interest rate derivatives
 3
 
 3
Cash equivalents206
 
 
 206
Total$206
 $6
 $
 $212
Liabilities:       
Energy-related derivatives$
 $10
 $
 $10
As of December 31, 2015, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Cash equivalents$52
 $
 $
 $52
Liabilities:       
Energy-related derivatives$
 $47
 $
 $47
Valuation Methodologies
The energy-related derivatives primarily consist of over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Foreign currency derivatives are also standard over-the-counter financial products valued using the market approach. Inputs for foreign currency derivatives are from observable market sources.PowerSecure's lighting business. See Note 1015 under "Southern Company" for additional information on how these derivatives are used.
As of December 31, 2016 and 2015, other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt:   
2016$2,979
 $2,922
2015$2,537
 $2,413
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates offered to the Company.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

10. DERIVATIVES
The Company is exposed to market risks, primarily commodity price risk and interest rate risk. To manage the volatility attributable to these exposures, the Company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 9 for additional information. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.
Energy-Related Derivatives
The Company enters into energy-related derivatives to hedge exposures to electricity, gas, and other fuel price changes. However, due to cost-based rate regulations and other various cost recovery mechanisms, the Company has limited exposure to market volatility in energy-related commodity prices. The Company manages fuel-hedging programs, implemented per the guidelines of the Mississippi PSC, through the use of financial derivative contracts, which is expected to continue to mitigate price volatility.
Energy-related derivative contracts are accounted for under one of the following methods:
Regulatory Hedges – Energy-related derivative contracts which are designated as regulatory hedges relate primarily to the Company's fuel-hedging programs, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through the respective fuel cost recovery clauses.
Not Designated – Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of operations as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric industry. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2016, the net volume of energy-related derivative contracts for natural gas positions totaled 36 million mmBtu for the Company, with the longest hedge date of 2020 over which the Company is hedging its exposure to the variability in future cash flows for forecasted transactions.
Interest Rate Derivatives
The Company may also enter into interest rate derivatives to hedge exposure to changes in interest rates. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time the hedged transactions affect earnings. The derivatives employed as hedging instruments are structured to minimize ineffectiveness, which is recorded directly to income.
At December 31, 2016, the following interest rate derivatives were outstanding:
 Notional
Amount
 Interest
Rate
Received
 Weighted Average Interest
Rate Paid
 Hedge
Maturity
Date
 Fair Value
Gain (Loss)
December 31,
2016
 (in millions)       (in millions)
Cash Flow Hedges of Existing Debt$900
 1-month LIBOR 0.79% March 2018 $3
The estimated pre-tax losses that will be reclassified from accumulated OCI to interest expense for the next 12-month period ending December 31, 2017 are $2 million. The Company has deferred gains and losses that are expected to be amortized into earnings through 2022.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

Derivative Financial Statement Presentation and Amounts
The Company enters into energy-related and interest rate derivative contracts that may contain certain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. At December 31, 2016, fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with counterparties. At December 31, 2015, the fair value amounts of derivative instruments were presented gross on the balance sheets.
At December 31, 2016 and 2015, the fair value of energy-related derivatives and interest rate derivatives was reflected on the balance sheets as follows:
 20162015
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 (in millions)
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Other current assets/Other current liabilities$2
$6
$
$29
Other deferred charges and assets/Other deferred credits and liabilities2
5

18
Total derivatives designated as hedging instruments for regulatory purposes$4
$11
$
$47
Derivatives designated as hedging instruments in cash flow and fair value hedges    
Interest rate derivatives:    
Other current assets/Other current liabilities$2
$
$
$
Other deferred charges and assets/Other deferred credits and liabilities1



Total derivatives designated as hedging instruments in cash flow and fair value hedges$3
$
$
$
Gross amounts recognized$7
$11
$
$47
Gross amounts offset$(3)$(3)$
$
Net amounts recognized in the Balance Sheets(*)
$4
$8
$
$47
(*)At December 31, 2015, the fair value amounts for derivative contracts subject to netting arrangements were presented gross on the balance sheet.
Energy-related derivatives not designated as hedging instruments were immaterial for 2016 and 2015.
At December 31, 2016 and 2015, the pre-tax effects of unrealized derivative gains (losses) arising from energy-related derivatives designated as regulatory hedging instruments and deferred were as follows:
 Unrealized Losses Unrealized Gains
Derivative Category
Balance Sheet
Location
2016 2015 
Balance Sheet
Location
2016 2015
  (in millions)  (in millions)
Energy-related derivatives:(*)
Other regulatory assets, current$(5) $(29) Other regulatory liabilities, current$1
 $
 Other regulatory assets, deferred(3) (18) Other regulatory liabilities, deferred
 
Total energy-related derivative gains (losses) $(8) $(47)  $1
 $
(*)At December 31, 2016, the unrealized gains and losses for derivative contracts subject to netting arrangements were presented net on the balance sheet. At December 31, 2015, the unrealized gains and losses for derivative contracts were presented gross on the balance sheet.
For all years presented, the pre-tax effects of energy-related derivatives not designated as hedging instruments on the statements of operations were immaterial.

NOTES (continued)
Mississippi Power Company 2016 Annual Report

For the year ended December 31, 2016, the pre-tax effects of derivatives designated as cash flow hedging instruments on the statements of operations were $3 million. For the years ended December 31, 2015 and 2014, these effects were immaterial.
There was no material ineffectiveness recorded in earnings for any period presented.
Contingent Features
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain affiliated companies. At December 31, 2016, the Company's collateral posted with its derivative counterparties was immaterial.
At December 31, 2016, the fair value of derivative liabilities with contingent features, including certain agreements that could require collateral in the event that one or more Southern Company system power pool participants has a credit rating change to below investment grade because of joint2019 and several liability features underlying these derivatives,2018, goodwill was immaterial.as follows:
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
 At December 31, 2019At December 31, 2018
 (in millions)
Southern Company$5,280
$5,315
Southern Company Gas:  
Gas distribution operations$4,034
$4,034
Gas marketing services981
981
Southern Company Gas total$5,015
$5,015

The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. The Company has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk. Therefore, the Company does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Mississippi Power Company 2016 Annual Report

11. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Summarized quarterly financial information for 2016 and 2015 is as follows:
Quarter Ended
Operating
Revenues
 
Operating
Income (Loss)
 Net Income (Loss) After Dividends on Preferred Stock
 (in millions)
March 2016$257
 $(10) $11
June 2016277
 (28) 2
September 2016352
 9
 26
December 2016277
 (166) (89)
      
March 2015$276
 $24
 $35
June 2015275
 12
 49
September 2015341
 (66) (21)
December 2015246
 (143) (71)
In accordance with the adoption of ASU 2016-09 (see Note 1 under "Recently Issued Accounting Standards"), previously reported amounts for income tax expense were reduced by $1 million in 2016.
As a result of the revisions to the cost estimate for the Kemper IGCC, the Company recorded total pre-tax charges to income for the estimated probable losses on the Kemper IGCC of $206 million ($127 million after tax) in the fourth quarter 2016, $88 million ($54 million after tax) in the third quarter 2016, $81 million ($50 million after tax) in the second quarter 2016, $53 million ($33 million after tax) in the first quarter 2016, $183 million ($113 million after tax) in the fourth quarter 2015, $150 million ($93 million after tax) in the third quarter 2015, $23 million ($14 million after tax) in the second quarter 2015, and $9 million ($6 million after tax) in the first quarter 2015. See Note 3 under "Integrated Coal Gasification Combined Cycle" for additional information.
The Company's business is influenced by seasonal weather conditions.

SELECTED FINANCIAL AND OPERATING DATA 2012-2016
Mississippi Power Company 2016 Annual Report
 2016 2015 2014 2013 2012
Operating Revenues (in millions)$1,163
 $1,138
 $1,243
 $1,145
 $1,036
Net Income (Loss) After Dividends
on Preferred Stock (in millions)
$(50) $(8) $(329) $(477) $100
Cash Dividends
on Common Stock (in millions)
$
 $
 $
 $72
 $107
Return on Average Common Equity (percent)(1.87) (0.34) (15.43) (24.28) 7.14
Total Assets (in millions)(a)(b)
$8,235
 $7,840
 $6,642
 $5,822
 $5,334
Gross Property Additions (in millions)$946
 $972
 $1,389
 $1,773
 $1,665
Capitalization (in millions):         
Common stock equity$2,943
 $2,359
 $2,084
 $2,177
 $1,749
Redeemable preferred stock33
 33
 33
 33
 33
Long-term debt(a)
2,424
 1,886
 1,621
 2,157
 1,561
Total (excluding amounts due within one year)$5,400
 $4,278
 $3,738
 $4,367
 $3,343
Capitalization Ratios (percent):         
Common stock equity54.5
 55.1
 55.8
 49.9
 52.3
Redeemable preferred stock0.6
 0.8
 0.9
 0.7
 1.0
Long-term debt(a)
44.9
 44.1
 43.3
 49.4
 46.7
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Customers (year-end):         
Residential153,172
 153,158
 152,453
 152,585
 152,265
Commercial33,783
 33,663
 33,496
 33,250
 33,112
Industrial451
 467
 482
 480
 472
Other175
 175
 175
 175
 175
Total187,581
 187,463
 186,606
 186,490
 186,024
Employees (year-end)1,484
 1,478
 1,478
 1,344
 1,281
(a)A reclassification of debt issuance costs from Total Assets to Long-term debt of $9 million, $11 million, and $4 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(b)A reclassification of deferred tax assets from Total Assets of $105 million, $16 million, and $36 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.


SELECTED FINANCIAL AND OPERATING DATA 2012-2016 (continued)
Mississippi Power Company 2016 Annual Report
 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions):         
Residential$260
 $238
 $239
 $242
 $227
Commercial279
 256
 257
 266
 251
Industrial313
 287
 291
 289
 263
Other7
 (5) 8
 2
 6
Total retail859
 776
 795
 799
 747
Wholesale — non-affiliates261
 270
 323
 294
 256
Wholesale — affiliates26
 76
 107
 35
 16
Total revenues from sales of electricity1,146
 1,122
 1,225
 1,128
 1,019
Other revenues17
 16
 18
 17
 17
Total$1,163
 $1,138
 $1,243
 $1,145
 $1,036
Kilowatt-Hour Sales (in millions):         
Residential2,051
 2,025
 2,126
 2,088
 2,046
Commercial2,842
 2,806
 2,860
 2,865
 2,916
Industrial4,906
 4,958
 4,943
 4,739
 4,702
Other39
 40
 40
 40
 38
Total retail9,838
 9,829
 9,969
 9,732
 9,702
Wholesale — non-affiliates3,920
 3,852
 4,191
 3,929
 3,819
Wholesale — affiliates1,108
 2,807
 2,900
 931
 572
Total14,866
 16,488
 17,060
 14,592
 14,093
Average Revenue Per Kilowatt-Hour (cents)(*):
         
Residential12.68
 11.75
 11.26
 11.59
 11.09
Commercial9.82
 9.12
 8.99
 9.27
 8.60
Industrial6.38
 5.79
 5.89
 6.10
 5.59
Total retail8.73
 7.90
 7.97
 8.21
 7.70
Wholesale5.71
 5.20
 6.06
 6.76
 6.19
Total sales7.71
 6.80
 7.18
 7.73
 7.23
Residential Average Annual
Kilowatt-Hour Use Per Customer
13,383
 13,242
 13,934
 13,680
 13,426
Residential Average Annual
Revenue Per Customer
$1,697
 $1,556
 $1,568
 $1,585
 $1,489
Plant Nameplate Capacity
Ratings (year-end) (megawatts)
3,481
 3,561
 3,867
 3,088
 3,088
Maximum Peak-Hour Demand (megawatts):         
Winter2,195
 2,548
 2,618
 2,083
 2,168
Summer2,384
 2,403
 2,345
 2,352
 2,435
Annual Load Factor (percent)64.0
 60.6
 59.4
 64.7
 61.9
Plant Availability Fossil-Steam (percent)91.4
 90.6
 87.6
 89.3
 91.5
Source of Energy Supply (percent):         
Coal8.0
 16.5
 39.7
 32.7
 22.8
Oil and gas84.9
 81.6
 55.3
 57.1
 63.9
Purchased power —         
From non-affiliates(0.3) 0.4
 1.4
 2.0
 2.0
From affiliates7.4
 1.5
 3.6
 8.2
 11.3
Total100.0
 100.0
 100.0
 100.0
 100.0
(*)The average revenue per kilowatt-hour (cents) is based on booked operating revenues and will not match billed revenue per kilowatt-hour.


SOUTHERN POWER COMPANY
FINANCIAL SECTION


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Power Company and Subsidiary Companies 2016 Annual Report
The management of Southern Power Company (the Company) is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of the Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2016.
/s/ Joseph A. Miller
Joseph A. Miller
Chairman, President, and Chief Executive Officer
/s/ William C. Grantham
William C. Grantham
Senior Vice President, Chief Financial Officer, and Treasurer
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Southern Power Company

We have audited the accompanying consolidated balance sheets of Southern Power Company and Subsidiary Companies (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for each of the three years in the period ended December 31, 2016. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements (pages II-507 to II-536) present fairly, in all material respects, the financial position of Southern Power Company and Subsidiary Companies as of December 31, 2016 and 2015, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2016, in conformity with accounting principles generally accepted in the United States of America.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017


DEFINITIONS
TermMeaning
Alabama PowerAlabama Power Company
AOCIAccumulated other comprehensive income
ASCAccounting Standards Codification
ASUAccounting Standards Update
Clean Air ActClean Air Act Amendments of 1990
CO2
Carbon dioxide
CODCommercial operation date
CWIPConstruction work in progress
EMCElectric Membership Corporation
EPAU.S. Environmental Protection Agency
EPEEl Paso Electric Company
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
First SolarFirst Solar, Inc.
FPLFlorida Power & Light Company
GAAPU.S. generally accepted accounting principles
Georgia PowerGeorgia Power Company
Gulf PowerGulf Power Company
InvenergyInvenergy Wind Global LLC
IRSInternal Revenue Service
ITCInvestment tax credit
KWHKilowatt-hour
LTSALong-term service agreement
Mississippi PowerMississippi Power Company
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
MWMegawatt
MWHMegawatt hour
OCIOther comprehensive income
power poolThe operating arrangement whereby the integrated generating resources of the traditional electric operating companies and Southern Power (excluding subsidiaries) are subject to joint commitment and dispatch in order to serve their combined load obligations
PPAPower purchase agreements and contracts for differences that provide the owner of a renewable facility a certain fixed price for the electricity sold to the grid
PTCProduction tax credit
RecurrentRecurrent Energy, LLC
S&PS&P Global Ratings, a division of S&P Global Inc.
SCESouthern California Edison Company
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
Southern CompanyThe Southern Company
Southern Company GasSouthern Company Gas (formerly known as AGL Resources Inc.) and its subsidiaries
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power Company, Southern Company Gas (as of July 1, 2016), Southern Electric Generating Company, Southern Nuclear, SCS, Southern LINC, PowerSecure, Inc. (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.

DEFINITIONS
(continued)

TermMeaning
SRESouthern Renewable Energy, Inc. owned 100% by Southern Power Company
SRPSouthern Renewable Partnerships, LLC owned 100% by Southern Power Company
STRSouthern Turner Renewable Energy, LLC owned 90% by SRE and 10% by TRE
SunPowerSunPower Corp.
traditional electric operating companiesAlabama Power, Georgia Power, Gulf Power, and Mississippi Power
TRETurner Renewable Energy, LLC, a 10% partner with SRE

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southern Power Company and Subsidiary Companies 2016 Annual Report
OVERVIEW
Business Activities
Southern Power Company and its subsidiaries (the Company) construct, acquire, own, and manage power generation assets, including renewable energy projects, and sell electricity at market-based rates in the wholesale market. The Company continually seeks opportunities to execute its strategy to create value through various transactions including acquisitions and sales of assets, construction of new generating facilities, and entry into PPAs primarily with investor-owned utilities, independent power producers, municipalities, and other load-serving entities. In general, the Company has constructed or acquired new generating capacity only after entering into or assuming long-term PPAs for the new facilities.
During 2016, the Company acquired or commenced construction of approximately 2,134 MWs of additional solar, wind, and natural gas facilities and completed construction of approximately 1,060 MWs of solar facilities. In addition, the Company entered into a joint development agreement to develop and construct up to approximately 3,000 MWs of wind facilities to be placed in service between 2018 and 2020. Subsequent to December 31, 2016, the Company acquired Bethel Wind, LLC (Bethel Wind), which is an approximately 276-MW wind facility. See FUTURE EARNINGS POTENTIAL – "Acquisitions" and "Construction Projects" herein for additional information.
As of December 31, 2016, the Company owned generating units totaling 11,768 MWs of nameplate capacity in commercial operation (including 3,980 MWs owned by its subsidiaries), after taking into consideration its equity ownership percentage of the solar and wind facilities. The average remaining duration of the Company's total portfolio of wholesale contracts is approximately 16 years, which reduces remarketing risk for the Company. With the inclusion of the PPAs and investments associated with the solar and natural gas facilities currently under construction and Bethel Wind,which was acquired subsequent to December 31, 2016, as well as other capacity and energy contracts, the Company has an average investment coverage ratio of 91% through 2021 and 90% through 2026.
The Company's future earnings will also depend on the parameters of the wholesale market and the efficient operation of its wholesale generating assets. The Company's renewable energy projects may be impacted by the availability of federal and state solar ITCs and wind PTCs, which could be impacted by potential tax reform legislation. See FUTURE EARNINGS POTENTIAL – "Acquisitions," "Construction Projects," and "Income Tax Matters – Tax Credits" herein for additional information.
To evaluate operating results and to ensure the Company's ability to meet its contractual commitments to customers, the Company continues to focus on several key performance indicators, including, but not limited to, peak season equivalent forced outage rate and contract availability.
See RESULTS OF OPERATIONS herein for information on the Company's financial performance.
Earnings
The Company's 2016 net income was $338 million, a $123 million, or 57%, increase from 2015. The increase was primarily due to increased federal income tax benefits from solar ITCs and wind PTCs and increased renewable energy sales, partially offset by increases in depreciation, operations and maintenance expenses, and interest expense from debt issuances, primarily related to new solar and wind facilities.
The Company's 2015 net income was $215 million, a $43 million, or 25%, increase from 2014. The increase was primarily due to increased revenues from new PPAs, including solar and wind, partially offset by increased depreciation and other operations and maintenance expenses primarily due to new solar and wind facilities and higher income taxes.
Benefits from solar ITCs, related to the Company's acquisition and construction of new facilities, and wind PTCs, related to wind generation, significantly impacted the Company's net income in 2016. The Company's net income in 2015 and 2014 was also significantly impacted by solar ITCs. See Note 5 to the financial statements under "Effective Tax Rate" for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 20162019 Annual Report


RESULTS OF OPERATIONS
A condensed statement of income follows:
 Amount 
Increase (Decrease)
from Prior Year
 2016 2016 2015
 (in millions)
Operating revenues$1,577
 $187
 $(111)
Fuel456
 15
 (155)
Purchased power102
 9
 (78)
Other operations and maintenance354
 94
 23
Depreciation and amortization352
 104
 28
Taxes other than income taxes23
 1
 
Total operating expenses1,287
 223
 (182)
Operating income290
 (36) 71
Interest expense, net of amounts capitalized117
 40
 (12)
Other income (expense), net6
 5
 (5)
Income taxes (benefit)(195) (216) 24
Net income374
 145
 54
Less: Net income attributable to noncontrolling interests36
 22
 11
Net income attributable to the Company$338
 $123
 $43
Operating Revenues
Total operating revenues include PPA capacity revenues, which are derived primarily from long-term contracts involving natural gasAt December 31, 2019 and biomass generating facilities, and PPA energy revenues which include sales from the Company's natural gas, biomass, solar, and wind facilities. To the extent the Company has capacity not contracted under a PPA, it may sell power into the wholesale market or the Company (excluding its subsidiaries) may sell power into the power pool.
Natural Gas and Biomass Capacity and Energy Revenue:
Capacity revenues generally represent the greatest contribution to net income and are designed to provide recovery of fixed costs plus a return on investment.
Energy is generally sold at variable cost or is indexed to published gas indices. Energy revenues will vary depending on the energy demand of the Company's customers and their generation capacity, as well as the market prices of wholesale energy compared to the cost of the Company's energy. Energy revenues also include fees for support services, fuel storage, and unit start charges. Increases and decreases in energy revenues under PPAs that are driven by fuel or purchased power prices are accompanied by an increase or decrease in fuel and purchased power costs and do not have a significant impact on net income.
Solar and Wind Energy Revenue:
The Company's electricity sales from solar and wind generating facilities are predominantly through long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or pay a fixed price for electricity sold to the grid. As a result, the Company's ability to recover fixed and variable operations and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, and2018, other factors.
See FUTURE EARNINGS POTENTIAL – "Power Sales Agreements" herein for additional information regarding the Company's PPAs.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Details of the Company's operating revenuesintangible assets were as follows:
 2016 2015 2014
   (in millions)  
PPA capacity revenues$541
 $569
 $546
PPA energy revenues694
 560
 638
Total PPA revenues1,235
 1,129
 1,184
Non-PPA revenues330
 252
 315
Other revenues12
 9
 2
Total operating revenues$1,577
 $1,390
 $1,501
Operating revenues for 2016 were $1.6 billion, reflecting a $187 million, or 13%, increase from 2015. The increase in operating revenues was primarily due to the following:
PPA capacity revenuesdecreased $28 million as a result of a $44 million decrease in non-affiliate capacity revenues primarily as a result of PPA expirations and subsequent generation capacity remarketing into the short-term markets, partially offset by a $16 million increase in affiliate capacity revenues due to new PPAs.
PPA energy revenues increased $134 million primarily due to a $170 million increase in renewable energy sales arising from new solar and wind facilities, partially offset by a decrease of $36 million in fuel revenues related to PPAs served by natural gas facilities. Overall, total KWH sales under PPAs increased 7% in 2016 when compared to 2015.
Non-PPA revenues increased $78 million primarily due to a 23% increase in KWH sales. Underlying this increase was a $113 million increase in short-term sales to non-affiliates as a result of remarketing generation capacity from expired PPAs, partially offset by a $35 million decrease in power pool sales primarily associated with a reduction in capacity available for sale.
Operating revenues for 2015 were $1.4 billion, reflecting a $111 million, or 7%, decrease from 2014. The decrease in operating revenues was primarily due to the following:
PPA capacity revenuesincreased $23 million ($50 million increase related to affiliates, partially offset by a $27 million decrease related to non-affiliates), primarily due to a 1% increase in total MW capacity contracted with affiliates associated with new natural gas PPAs.
PPA energy revenues decreased $78 million due to a $141 million decrease primarily related to a 34% decrease in the average price of energy driven by lower natural gas prices passed through in fuel revenues, partially offset by a 13% increase in KWH sales. This decrease in natural gas PPA energy revenues was partially offset by a $63 million increase in energy revenues from PPAs related to the Company's acquisitions of solar and wind facilities. Overall, total KWH sales under PPAs increased 15% in 2015 when compared to 2014.
Non-PPA revenues decreased $63 million primarily due to lower natural gas prices, partially offset by a 19% increase in non-PPA KWH sales.
Fuel and Purchased Power Expenses
Fuel costs constitute the single largest expense for the Company. Additionally, the Company purchases a portion of its electricity needs from the wholesale market. Details of the Company's generation and purchased power were as follows:
 Total
KWHs
Total KWH % ChangeTotal
KWHs
Total KWH % Change
 2016 2015 
 (in billions of KWHs)
Generation37 33 
Purchased power3 2 
Total generation and purchased power4014%3517%
Total generation and purchased power excluding solar, wind, and tolling agreements2310%215%
The Company's PPAs for natural gas and biomass generation generally provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing the Company for substantially all of the cost of fuel relating to the energy

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

delivered under such PPAs. Consequently, changes in such fuel costs are generally accompanied by a corresponding change in related fuel revenues and do not have a significant impact on net income. The Company is responsible for the cost of fuel for generating units that are not covered under PPAs. Power from these generating units is sold into the wholesale market or into the power pool for capacity owned directly by the Company.
Purchased power expenses will vary depending on demand, availability, and the cost of generating resources throughout the Southern Company system and other contract resources. Load requirements are submitted to the power pool on an hourly basis and are fulfilled with the lowest cost alternative, whether that is generation owned by the Company, an affiliate company, or external parties. Such purchased power costs are generally recovered through PPA revenues.
Details of the Company's fuel and purchased power expenses were as follows:
 2016 2015 2014
   (in millions)  
Fuel$456
 $441
 $596
Purchased power102
 93
 171
Total fuel and purchased power expenses$558
 $534
 $767
In 2016, total fuel and purchased power expenses increased $24 million, or 5%, compared to 2015. The increase was primarily due to the following:
Fuel expenseincreased $15 million, or 3%, primarily due to a $22 million increase associated with the volume of KWHs generated, partially offset by a $7 million decrease associated with the average cost of natural gas per KWH generated.
Purchased power expense increased $9 million, or 10%, primarily due to a $53 million increase associated with the volume of KWHs purchased, partially offset by a $28 million decrease associated with the average cost of purchased power and a $16 million decrease associated with a PPA expiration.
In 2015, total fuel and purchased power expenses decreased $233 million, or 30%, compared to 2014. The decrease was primarily due to the following:
Fuel expensedecreased $155 million, or 26%, primarily due to a $228 million decrease associated with the average cost of natural gas per KWH generated, partially offset by a $73 million increase associated with the volume of KWHs generated.
Purchased power expense decreased $78 million, or 46%, primarily due to a $60 million decrease associated with the volume of KWHs purchased as well as an $18 million decrease associated with the average cost of purchased power.
Other Operations and Maintenance Expenses
In 2016, other operations and maintenance expenses increased $94 million, or 36%, compared to 2015. The increase was primarily due to increases of $35 million associated with new plants placed in service in 2015 and 2016, $25 million associated with scheduled outage and maintenance expenses, $19 million in business development and support expenses, $13 million in employee compensation, and $2 million in acquisition costs, all of which were primarily associated with the Company's overall growth.
In 2015, other operations and maintenance expenses increased $23 million, or 10%, compared to 2014. The increase was primarily due to increases of $11 million associated with new plants placed in service in 2014 and 2015, $10 million in business development and support services expenses, $5 million in transmission costs, and $3 million in employee compensation. These increases were partially offset by a $6 million decrease in generation maintenance expense.
Depreciation and Amortization
In 2016, depreciation and amortization increased $104 million, or 42%, compared to 2015. In 2015, depreciation and amortization increased $28 million, or 13%, compared to 2014. These increases were primarily due to additional depreciation related to new solar and wind facilities placed in service. See Note 1 to the financial statements under "Depreciation" for additional information.
Interest Expense, Net of Amounts Capitalized
In 2016, interest expense, net of amounts capitalized increased $40 million, or 52%, compared to 2015. The increase was primarily due to an increase of $66 million in interest expense related to additional debt issued during 2016 primarily to fund the Company's growth strategy and continuous construction program, partially offset by a $26 million increase in capitalized interest associated with the construction of solar facilities.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

In 2015, interest expense, net of amounts capitalized decreased $12 million, or 13%, compared to 2014. The decrease was primarily due to a $14 million increase in capitalized interest associated with the construction of solar facilities, partially offset by an increase of $2 million in interest expense related to additional debt issued to fund the Company's growth strategy and continuous construction program.
Other Income (Expense), Net
In 2016, other income (expense), net increased $5 million compared to 2015. The increase was due to a $5 million increase in interest received. In addition, the change includes an $82 million currency gain arising from translation of €1.1 billion euro-denominated fixed-rate notes into U.S dollars, fully offset by an $82 million loss on the foreign currency hedge that was reclassified from AOCI into earnings. See Note 9 to the financial statements under "Foreign Currency Derivatives" for additional information regarding hedging.
In 2015, other income (expense), net decreased $5 million compared to 2014. The decrease was due to the recognition of a $5 million bargain purchase gain recognized in 2014 arising from the acquisition of a solar facility.
Income Taxes (Benefit)
In 2016, income taxes (benefit) was $(195) million compared to an expense of $21 million for 2015. The $216 million change was primarily due to an increase of $180 million in federal income tax benefits related to ITCs for solar plants placed in service and PTCs from wind generation in 2016 and a $35 million decrease in tax expense related to lower pre-tax earnings in 2016.
In 2015, income taxes (benefit) increased $24 million compared to 2014. The increase was primarily due to a $26 million increase associated with higher pre-tax earnings and a $9 million increase resulting from state apportionment rate changes, partially offset by an $11 million increase in federal income tax benefits primarily related to ITCs for solar plants placed in service in 2015.
See Note 1 to the financial statements under "Income and Other Taxes" for information on how the Company recognizes the tax benefits related to federal ITCs and PTCs and Note 5 to the financial statements under "Effective Tax Rate" for additional information.
Effects of Inflation
The Company is party to long-term contracts reflecting market-based rates, including inflation expectations. Any adverse effect of inflation on the Company's results of operations has not been substantial in recent years.
FUTURE EARNINGS POTENTIAL
General
The results of operations for the past three years are not necessarily indicative of the Company's future earnings potential. The level of the Company's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Company's competitive wholesale business. These factors include: the Company's ability to achieve sales growth while containing costs; regulatory matters; creditworthiness of customers; total generating capacity available in the Company's market areas; the successful remarketing of capacity as current contracts expire; the Company's ability to execute its growth strategy, including successful additional investments in renewable and other energy projects, and to develop and construct generating facilities. Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction. The ultimate impact of any tax reform proposals, including any potential changes to the availability or realizability of ITCs and PTCs, is dependent on the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on the Company's financial statements.
Demand for electricity is primarily driven by economic growth. The pace of economic growth and electricity demand may be affected by changes in regional and global economic conditions, as well as renewable portfolio standards, which may impact future earnings.
Other factors that could influence future earnings include weather, demand, cost of generation from units within the power pool, and operational limitations.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Power Sales Agreements
General
The Company has PPAs with some of Southern Company's traditional electric operating companies, other investor-owned utilities, independent power producers, municipalities, and other load-serving entities. The PPAs are expected to provide the Company with a stable source of revenue during their respective terms.
Many of the Company's PPAs have provisions that require the Company or the counterparty to post collateral or an acceptable substitute guarantee in the event that S&P or Moody's downgrades the credit ratings of the respective company to an unacceptable credit rating or if the counterparty is not rated or fails to maintain a minimum coverage ratio. See FINANCIAL CONDITION AND LIQUIDITY – "Credit Rating Risk" herein for additional information.
The Company is working to maintain and expand its share of the wholesale market. The Company expects that limited additional demand for capacity will begin to develop within some of its market areas in the 2017-2019 timeframe. The Company calculates an investment coverage ratio for its generating assets based on the ratio of investment under contract to total investment using the respective generation facilities' net book value (or expected in-service value for facilities under construction or being acquired) as the investment amount. With the inclusion of the PPAs and investments associated with the solar and natural gas facilities currently under construction and Bethel Wind, which was acquired subsequent to December 31, 2016, as well as other capacity and energy contracts, the Company has an average investment coverage ratio of 91% through 2021 and 90% through 2026, with an average remaining contract duration of approximately 16 years. See "Acquisitions" and "Construction Projects" herein for additional information.
Natural Gas and Biomass
The Company's electricity sales from natural gas and biomass generating units are primarily through long-term PPAs that consist of two types of agreements. The first type, referred to as a unit or block sale, is a customer purchase from a dedicated generating unit where all or a portion of the generation from that unit is reserved for that customer. The Company typically has the ability to serve the unit or block sale customer from an alternate resource. The second type, referred to as requirements service, provides that the Company serve the customer's capacity and energy requirements from a combination of the customer's own generating units and from Company resources not dedicated to serve unit or block sales. The Company has rights to purchase power provided by the requirements customers' resources when economically viable.
As a general matter, substantially all of the PPAs provide that the purchasers are responsible for either procuring the fuel (tolling agreements) or reimbursing the Company for substantially all of the cost of fuel or purchased power relating to the energy delivered under such PPAs. To the extent a particular generating facility does not meet the operational requirements contemplated in the PPAs, the Company may be responsible for excess fuel costs. With respect to fuel transportation risk, most of the Company's PPAs provide that the counterparties are responsible for transporting the fuel to the particular generating facility.
Capacity charges that form part of the PPA payments are designed to recover fixed and variable operation and maintenance costs based on dollars-per-kilowatt year. In general, to reduce the Company's exposure to certain operation and maintenance costs, the Company has LTSAs. See Note 1 to the financial statements under "Long-Term Service Agreements" for additional information.
Solar and Wind
The Company's electricity sales from solar and wind (renewables) generating facilities are also made pursuant to long-term PPAs; however, these solar and wind PPAs do not have a capacity charge and customers either purchase the energy output of a dedicated renewable facility through an energy charge or provide the Company a certain fixed price for the electricity sold to the grid. As a result, the Company's ability to recover fixed and variable operation and maintenance expenses is dependent upon the level of energy generated from these facilities, which can be impacted by weather conditions, equipment performance, and other factors. Generally, under the solar and wind generation PPAs, the purchasing party retains the right to keep or resell the renewable energy credits.
Environmental Matters
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including air, water, and land resources. Applicable statutes include the Clean Air Act; the Clean Water Act; the Comprehensive Environmental Response, Compensation, and Liability Act; the Resource Conservation and Recovery Act; the Toxic Substances Control Act; the Emergency Planning & Community Right-to-Know Act; the Endangered Species Act; the Migratory Bird Treaty Act; the Bald and Golden Eagle Protection Act; and related federal and

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

state regulations. Compliance with possible additional federal or state legislation or regulations related to global climate change, air quality, water quality, or other environmental and health concerns could also significantly affect the Company.
New environmental legislation or regulations, such as requirements related to greenhouse gases or changes to existing statutes or regulations, could affect many areas of the Company's operations. While the Company's PPAs generally contain provisions that permit charging the counterparty with some of the new costs incurred as a result of changes in environmental laws and regulations, the full impact of any such legislative or regulatory changes cannot be determined at this time.
Since the Company's units are newer natural gas and renewable generating facilities, costs associated with environmental compliance for these facilities have been less significant than for similarly situated coal or older natural gas generating facilities. Environmental, natural resource, and land use concerns, including the applicability of air quality limitations, the potential presence of wetlands or threatened and endangered species, the availability of water withdrawal rights, uncertainties regarding aesthetic impacts such as increased light or noise, and concerns about potential adverse health impacts can, however, increase the cost of siting and operating any type of future electric generating facility. The impact of such statutes and regulations on the Company cannot be determined at this time.
Environmental Statutes and Regulations
Air Quality
On July 6, 2011, the EPA finalized the Cross-State Air Pollution Rule (CSAPR). CSAPR is an emissions trading program that limits SO2 and nitrogen oxide (NOx) emissions from power plants in two phases – Phase 1 in 2015 and Phase 2 in 2017. On October 26, 2016, the EPA published a final rule that updates the CSAPR ozone season NOx program, beginning in 2017, and establishes more stringent ozone-season emissions budgets in Alabama and Texas and removes Florida and North Carolina from the program. The State of Georgia's emission budget was not affected by the revisions, but interstate emissions trading is restricted unless the state decides to voluntarily adopt a significantly reduced budget. Alabama, Georgia, North Carolina, and Texas are also in the CSAPR annual SO2 and NOx programs.
In June 2015, the EPA published a final rule requiring certain states (including Alabama, Florida, Georgia, North Carolina, and Texas) to revise or remove the provisions of their State Implementation Plans (SIPs) relating to the regulation of excess emissions at industrial facilities, including fossil fuel-fired generating facilities, during periods of startup, shut-down, or malfunction (SSM), and many states have submitted proposed SIP revisions in response to the rule.
The Company has developed and continually updates a comprehensive environmental compliance strategy to assess compliance obligations associated with the current and proposed environmental requirements discussed above. These regulations could result in additional capital expenditures and compliance costs that could affect results of operations, cash flows, and financial condition if such costs are not recovered through PPAs. Further, if higher costs are recovered through regulated rates at other utilities, this could contribute to reduced demand for electricity, which could negatively impact results of operations, cash flows, and financial condition. The ultimate impact of the CSAPR and SSM rule will depend on various factors, such as implementation, adoption, or other action at the state level, and the outcome of pending and/or future legal challenges, and cannot be determined at this time.
Water Quality
The EPA's final rule establishing standards for reducing effects on fish and other aquatic life caused by new and existing cooling water intake structures at existing power plants and manufacturing facilities became effective in 2014. The effect of this final rule will depend on the results of additional studies that are currently underway and implementation of the rule by regulators based on site-specific factors. National Pollutant Discharge Elimination System (NPDES) permits issued after July 14, 2018 must include conditions to implement and ensure compliance with the standards and protective measures required by the rule.
In November 2015, the EPA published a final effluent guidelines rule which imposes stringent technology-based requirements for certain wastestreams from steam electric power plants. The revised technology-based limits and compliance dates will be incorporated into future renewals of NPDES permits at affected units and may require the installation and operation of multiple technologies sufficient to ensure compliance with applicable new numeric wastewater compliance limits. Compliance deadlines between November 1, 2018 and December 31, 2023 will be established in permits based on information provided for each applicable wastestream.
These water quality regulations could result in additional capital expenditures and compliance costs. Also, results of operations, cash flows, and financial condition could be impacted if such costs are not recovered through PPAs. Based on a preliminary assessment of the impact of the proposed rules, the Company estimates compliance costs to be immaterial. Further, if higher costs are recovered through regulated rates at other utilities, this could contribute to reduced demand for electricity, which could negatively impact results of operations, cash flows, and financial condition. The ultimate impact of these final rules will depend

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

on various factors, such as pending and/or future legal challenges, compliance dates, and implementation of the rules, and cannot be determined at this time.
Global Climate Issues
In October 2015, the EPA published two final actions that would limit CO2 emissions from fossil fuel-fired electric generating units. One of the final actions contains specific emission standards governing CO2 emissions from new, modified, and reconstructed units. The other final action, known as the Clean Power Plan, establishes guidelines for states to develop plans to meet EPA-mandated CO2 emission rates or emission reduction goals for existing units. The EPA's final guidelines require state plans to meet interim CO2 performance rates between 2022 and 2029 and final rates in 2030 and thereafter. At the same time, the EPA published a proposed federal plan and model rule that, when finalized, states can adopt or that would be put in place if a state either does not submit a state plan or its plan is not approved by the EPA. On February 9, 2016, the U.S. Supreme Court granted a stay of the Clean Power Plan, pending disposition of petitions for review with the courts. The stay will remain in effect through the resolution of the litigation, including any review by the U.S. Supreme Court.
These guidelines and standards could result in operational restrictions and material compliance costs, including capital expenditures, which could affect future unit retirement and replacement decisions. The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through PPAs. Further, if higher costs are recovered through regulated rates at other utilities, this could contribute to reduced demand for electricity, which could negatively impact results of operations, cash flows, and financial condition. However, the ultimate financial and operational impact of the final rules on the Company cannot be determined at this time and will depend upon numerous factors, including the outcome of pending legal challenges, and any individual state implementation of the EPA's final guidelines in the event the rule is upheld and implemented.
In December 2015, parties to the United Nations Framework Convention on Climate Change – including the United States – adopted the Paris Agreement, which establishes a non-binding universal framework for addressing greenhouse gas emissions based on nationally determined contributions. It also sets in place a process for tracking progress toward the goals every five years. The ultimate impact of this agreement depends on its implementation by participating countries and cannot be determined at this time.
The EPA's greenhouse gas reporting rule requires annual reporting of greenhouse gas emissions expressed in terms of metric tons of CO2 equivalent emissions for a company's operational control of facilities. Based on ownership or financial control of facilities, the Company's 2015 greenhouse gas emissions were approximately 13 million metric tons of CO2 equivalent. The preliminary estimate of the Company's 2016 greenhouse gas emissions on the same basis is approximately 13 million metric tons of CO2 equivalent. The level of greenhouse gas emissions from year to year will depend on the level of generation, including new or acquired natural gas-fired plants, the mix of fuel sources, and other factors.
Income Tax Matters
Consolidated Income Taxes
On behalf of the Company, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined, unitary, or consolidated. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
The impact of certain tax events at Southern Company and/or its other subsidiaries can, and does, affect the Company's ability to utilize certain tax credits. See Note 5 to the financial statements for additional information.
Tax Credits
In December 2015, the Protecting Americans from Tax Hikes (PATH) Act was signed into law. The PATH Act allows for 30% ITC for solar projects that commence construction by December 31, 2019; 26% ITC for solar projects that commence construction in 2020; 22% ITC for solar projects that commence construction in 2021; and a permanent 10% ITC for solar projects that commence construction on or after January 1, 2022. In addition, the PATH Act allows for 100% PTC for wind projects that commenced construction in 2016; 80% PTC for wind projects that commence construction in 2017; 60% PTC for wind projects that commence construction in 2018; and 40% PTC for wind projects that commence construction in 2019. Wind projects commencing construction after 2019 will not be entitled to any PTCs. The Company has received ITCs related to its investment in new solar facilities acquired or constructed and receives PTCs related to the first 10 years of energy production from its wind facilities, which have had, and will continue to have, a material impact on the Company's cash flows and net

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

income. At December 31, 2016, the Company had approximately $1.7 billion of unutilized ITCs and PTCs, which are currently expected to be fully utilized by 2022, but could be further delayed as a result of the Company's continued growth strategy, as well as the impact of potential tax reform legislation. See Note 1 to the financial statements under "Income and Other Taxes" and Note 5 to the financial statements under "Current and Deferred Income Taxes – Tax Credit Carryforwards" and "Effective Tax Rate" for additional information regarding utilization and amortization of credits and the tax benefit related to basis differences.
Bonus Depreciation
The PATH Act also extended bonus depreciation for qualified property placed in service over the next five years. The PATH Act allows for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension of bonus depreciation included in the PATH Act is expected to result in approximately $630 million of positive cash flows for the 2016 tax year, which was not all realized in 2016 due to a projected consolidated net operating loss (NOL) for Southern Company. Approximately $150 million of positive cash flows is expected to result from bonus depreciation for the 2017 tax year, but may not all be realized in 2017 due to additional NOL projections for the 2017 tax year. As a result, the NOL increased deferred tax assets for federal ITC and PTC carryforwards. See Note 5 to the financial statements under "Current and Deferred Income Taxes – Tax Credit Carryforwards" and " – Net Operating Loss" for additional information. The ultimate outcome of this matter cannot be determined at this time.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Acquisitions
During 2016, in accordance with its overall growth strategy, the Company or one of its wholly-owned subsidiaries, SRP and SRE, acquired or contracted to acquire the projects discussed below. Also, on March 29, 2016, the Company acquired an additional 15% interest in Desert Stateline, 51% of which was initially acquired in August 2015. As a result, the Company and the class B member are now entitled to 66% and 34%, respectively, of all cash distributions from Desert Stateline. In addition, the Company will continue to be entitled to substantially all of the federal tax benefits with respect to the transaction. See Note 2 to the financial statements for additional information.
Project FacilityResource
Approximate Nameplate Capacity (MW)
LocationPercentage OwnershipActual/Expected CODPPA CounterpartiesPPA Contract Period
Acquisitions During the Year Ended December 31, 2016
Boulder 1Solar100Clark County, NV51%(a)December 2016Nevada Power Company20 years
CalipatriaSolar20Imperial County, CA90%(b)February 2016San Diego Gas & Electric Company20 years
East PecosSolar120Pecos County, TX100% March 2017Austin Energy15 years
Grant PlainsWind147Grant County, OK100% December 2016Oklahoma Municipal Power Authority and Steelcase Inc.
20 years and 12 years (c)
Grant WindWind151Grant County, OK100% April 2016Western Farmers, East Texas, and Northeast Texas Electric Cooperatives20 years
HenriettaSolar102Kings County, CA51%(a)July 2016Pacific Gas & Electric Company20 years
LamesaSolar102Dawson County, TX100% Second quarter 2017City of Garland, Texas15 years
Mankato (d)
Natural Gas375Mankato, MN100% 
N/A (e)
Northern States Power Company10 years
PassadumkeagWind42Penobscot County, ME100% July 2016Western Massachusetts Electric Company15 years
RutherfordSolar74Rutherford County, NC90%(b)December 2016Duke Energy Carolinas, LLC15 years
Salt ForkWind174Donley and Gray Counties, TX100% December 2016City of Garland, Texas and Salesforce.com, Inc.14 years and 12 years
Tyler BluffWind125Cooke County, TX100% December 2016The Proctor & Gamble Company12 years
Wake WindWind257Floyd and Crosby Counties, TX90.1%(f)October 2016Equinix Enterprises, Inc. and Owens Corning12 years
Acquisitions Subsequent to December 31, 2016
BethelWind276Castro County, TX100% January 2017Google Energy, Inc.12 years
 At December 31, 2019 At December 31, 2018
 Gross Carrying AmountAccumulated AmortizationOther
Intangible Assets, Net
 Gross Carrying AmountAccumulated AmortizationOther
Intangible Assets, Net
 (in millions) (in millions)
Southern Company       
Other intangible assets subject to amortization:       
Customer relationships(a)
$212
$(116)$96
 $223
$(94)$129
Trade names(a)
64
(25)39
 70
(21)49
Storage and transportation contracts64
(62)2
 64
(54)10
PPA fair value adjustments(b)
390
(69)321
 405
(61)344
Other11
(8)3
 11
(5)6
Total other intangible assets subject to amortization$741
$(280)$461

$773
$(235)$538
Other intangible assets not subject to amortization:       
Federal Communications Commission licenses75

75
 75

75
Total other intangible assets$816
$(280)$536

$848
$(235)$613
        
Southern Power       
Other intangible assets subject to amortization:       
PPA fair value adjustments(b)
$390
$(69)$321
 $405
$(61)$344
        
Southern Company Gas       
Other intangible assets subject to amortization:       
Gas marketing services       
Customer relationships$156
$(104)$52
 $156
$(84)$72
Trade names26
(10)16
 26
(7)19
Wholesale gas services       
Storage and transportation contracts64
(62)2
 64
(54)10
Total other intangible assets subject to amortization$246
$(176)$70
 $246
$(145)$101
(a)The Company owns 100%decrease in the gross carrying amount during 2019 primarily reflects the sales of the class A membership interests and a wholly-owned subsidiary of the seller owns 100% of the class B membership interests. The Company and the class B member are entitled to 51% and 49%, respectively, of all cash distributions from the project. In addition, the Company is entitled to substantially all of the federal tax benefits with respect to the transaction.2 PowerSecure business units. See Note 15 for additional information.
(b)
The Company owns 90%, withdecrease in the minority owner, TRE, owning 10%.
(c)In additiongross carrying amount during 2019 reflects the sale of Plant Nacogdoches, partially offset by additional PPA fair value adjustments related to the 20-year and 12-year PPAs, the facility has a 10-year contract with Allianz Risk Transfer (Bermuda) Ltd.
(d)
Under the termsacquisition of the remaining 10-year PPA and the 20-year expansion PPA, approximately $408 million of assets, primarily related to property, plant, and equipment, are subject to lien at December 31, 2016.DSGP. See Note 15 under "Southern Power" for additional information.
(e)The acquisition included a fully operational 375-MW natural gas-fired combined-cycle facility.
(f)The Company owns 90.1%, with the minority owner, Invenergy, owning 9.9%.
Acquisitions During the Year Ended December 31, 2016
The Company's aggregate purchase price of acquisitions during the year ended December 31, 2016 was approximately $2.3 billion, of which $461 million is included in acquisitions payable on the consolidated balance sheets at December 31, 2016.


MANAGEMENT'S DISCUSSION AND ANALYSISCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Power Company and Subsidiary Companies 20162019 Annual Report


The aggregate amount of revenue recognized by the Company related to the acquisitions during 2016, includedAmortization associated with other intangible assets in the consolidated statement of income for 2016, is $37 million. The amount of net income, excluding impacts of ITCs2019, 2018, and PTCs, attributable to the Company related to the acquisitions during 2016 included in the consolidated statement of income is immaterial.
The solar and wind acquisitions did not have operating revenues or net income prior to the completion of construction and the generating facility being placed in service; therefore, supplemental pro forma information as if these acquisitions occurred as of the beginning of 2016, and for the comparable 2015 year, is not meaningful and has been omitted. However, the Mankato acquisition is an operating facility and unaudited supplemental pro forma information, as though the acquisition occurred as of the beginning of 2016 and for the comparable 2015 year, is2017 was as follows:
 20162015
 (in millions)
Revenues$40,000,000
$39,000,000
Net income$14,000,000
$11,000,000
These unaudited pro forma results are for comparative purposes only and may not be indicative of the results that would have occurred had this acquisition been completed on January 1, 2015 or the results that may be attained in the future.
Construction Projects
Construction Projects Completed
During 2016, in accordance with its overall growth strategy, the Company completed construction of, and placed in service, the projects set forth in the following table. Total costs of construction incurred for these projects were $3.2 billion.
Solar Facility
Approximate Nameplate Capacity (MW)
LocationActual CODPPA CounterpartiesPPA Contract Period
Projects Completed During the Year Ended December 31, 2016
Butler103Taylor County, GADecember 2016
Georgia Power (a)
30 years
Butler Solar Farm22Taylor County, GAFebruary 2016
Georgia Power (a)
20 years
Desert Stateline
299(b)
San Bernardino County, CAFrom December 2015 to July 2016SCE20 years
Garland185Kern County, CAOctober 2016SCE15 years
Garland A20Kern County, CAAugust 2016SCE20 years
Pawpaw30Taylor County, GAMarch 2016
Georgia Power (a)
30 years
Roserock (c)
160Pecos County, TXNovember 2016Austin Energy20 years
Sandhills146Taylor County, GAOctober 2016Cobb, Flint, Irwin, Middle Georgia and Sawnee Electric Membership Corporations25 years
Tranquillity205Fresno County, CAJuly 2016Shell Energy North America (US), LP/SCE18 years
 201920182017
 (in millions)
Southern Company(a)
$61
$89
$124
Southern Power(b)
19
25
25
Southern Company Gas:   
Gas marketing services$23
$32
$54
Wholesale gas services(b)
8
20
32
Southern Company Gas total$31
$52
$86
(a)Affiliate PPA approved by the FERC.    Includes $27 million, $45 million, and $57 million in 2019, 2018, and 2017, respectively, recorded as a reduction to operating revenues.
(b)The facility hasRecorded as a total of 299 MWs, of which 110 MWs were placed in service in the fourth quarter 2015 and 189 MWs were placed in service through July 2016.reduction to operating revenues.
At December 31, 2019, the estimated amortization associated with other intangible assets for the next five years is as follows:
 20202021202220232024
 (in millions)
Southern Company(*)
$48
$42
$38
$37
$35
Southern Power(*)
20
20
20
20
20
Southern Company Gas19
13
10
9
7
(c)(*)Prior
Excludes amounts related to placing the Roserock facility in service, certain solar panels were damaged. While the facility is currently generating energy as expected, the Company is pursuing remediesheld for sale assets. See Note 15 under its insurance policies"Southern PowerSales of Natural Gas and other contracts to repair or replace these solar panels.Biomass Plants" for additional information.
Construction Projects in Progress
At December 31, 2016, theIntangible liabilities of $91 million recorded under acquisition accounting for transportation contracts at Southern Company continued construction of the East Pecos and Lamesa solar facilities thatGas were acquired in 2016. In addition, as part of the Company's acquisition of Mankato in 2016, the Company commenced construction of an additional 345-MW natural gas-fired generation expansion, which is fully contracted under a new 20-year PPA. Total aggregate

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

construction costs, excluding the acquisition costs, are expected to be $530 million to $590 million for East Pecos, Lamesa, and Mankato. At December 31, 2016, the construction costs included in CWIP totaled $386 million. The ultimate outcome of these matters cannot be determined at this time.
The following table presents the Company's construction projects in progressamortized as of December 31, 2016:
2019.
Project FacilityResource
Approximate Nameplate Capacity (MW)
LocationActual/Expected CODPPA CounterpartiesPPA Contract Period
East PecosSolar120Pecos County, TXMarch 2017Austin Energy15 years
LamesaSolar102Dawson County, TXSecond quarter 2017City of Garland, Texas15 years
MankatoNatural Gas345Mankato, MNSecond quarter 2019Northern States Power Company20 years
Development Projects
In December 31, 2016, as part of the Company's renewable development strategy, SRP entered into a joint development agreement with Renewable Energy Systems Americas, Inc. to develop and construct approximately 3,000 MWs across 10 wind projects expected to be placed in service between 2018 and 2020. Also in December 2016, the Company signed agreements and made payments to purchase wind turbine equipment from Siemens Wind Power, Inc. and Vestas-American Wind Technology, Inc. to be used for construction of the facilities. Once these wind projects reach commercial operations, they are expected to qualify for 100% PTCs. The ultimate outcome of these matters cannot be determined at this time.
FERC Matters
The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies and the Company filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' and the Company's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies and the Company to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies and the Company filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies and the Company filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' and the Company's potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The traditional electric operating companies and the Company expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
Other Matters
The Company is involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, the Company is subject to certain claims and legal actions arising in the ordinary course of business. The Company's business activities are subject to extensive governmental regulation related to public health and the environment, such as regulation of air emissions and water discharges. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements, such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The ultimate outcome of such pending or potential litigation against the Company cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.
ACCOUNTING POLICIES
Application of Critical Accounting Policies and Estimates
The Company prepares its consolidated financial statements in accordance with GAAP. Significant accounting policies are described in Note 1 to the financial statements. In the application of these policies, certain estimates are made that may have a material impact on the Company's results of operations and related disclosures. Different assumptions and measurements could produce estimates that are significantly different from those recorded in the financial statements. Senior management has reviewed and discussed the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Revenue Recognition
The Company's revenue recognition depends on appropriate classification and documentation of transactions in accordance with GAAP. In general, the Company's power sale transactions, which include PPAs, can be classified in one of four categories: leases, non-derivatives or normal sale derivatives, derivatives designated as cash flow hedges, and derivatives not designated as hedges. For more information on derivative transactions, see FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein and Notes 1 and 9 to the financial statements. The Company's revenues are dependent upon significant judgments used to determine the appropriate transaction classification, which must be documented upon the inception of each contract.
Lease Transactions
The Company considers the following factors to determine whether the sales contract is a lease:
Assessing whether specific property is explicitly or implicitly identified in the agreement;
Determining whether the fulfillment of the arrangement is dependent on the use of the identified property; and
Assessing whether the arrangement conveys to the purchaser the right to use the identified property.
If the contract meets the above criteria for a lease, the Company performs further analysis as to whether the lease is classified as operating, financing, or sales-type. All of the Company's power sales contracts that are determined to be leases are accounted for as operating leases and the capacity revenue is recognized on a straight-line basis over the term of the contract and is included in the Company's operating revenues. Energy revenues and other contingent revenues are recognized in the period the energy is delivered or the service is rendered.
Non-Derivative and Normal Sale Derivative Transactions
If the power sales contract is not classified as a lease, the Company further considers the following factors to determine proper classification:
Assessing whether the contract meets the definition of a derivative;
Assessing whether the contract meets the definition of a capacity contract;
Assessing the probability at inception and throughout the term of the individual contract that the contract will result in physical delivery; and
Ensuring that the contract quantities do not exceed available generating capacity (including purchased capacity).
Contracts that do not meet the definition of a derivative or are designated as normal sales (i.e. capacity contracts which provide for the sale of electricity that involve physical delivery in quantities within the Company's available generating capacity) are accounted for as executory contracts. The related capacity revenue, if any, is recognized on an accrual basis in amounts equal to the lesser of the cumulative levelized amount or the cumulative amount billable under the contract over the respective contract periods. Revenues related to energy and ancillary services are recognized in the period the energy is delivered or the service is rendered. Contracts recorded on the accrual basis represented the majority of the Company's operating revenues.
Cash Flow Hedge Transactions
The Company further considers the following in designating other derivative contracts for the sale of electricity as cash flow hedges of anticipated sale transactions:
Identifying the hedging instrument, the forecasted hedged transaction, and the nature of the risk being hedged; and

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Assessing hedge effectiveness at inception and throughout the contract term.
These contracts are accounted for on a fair value basis and are recorded in AOCI over the life of the contract. Realized gains and losses are then recognized in operating revenues as incurred.
Mark-to-Market Transactions
Contracts for sales of electricity, which meet the definition of a derivative and that either do not qualify or are not designated as normal sales or as cash flow hedges, are accounted for on a fair value basis and are recorded in operating revenues.
Impairment of Long-Lived Assets and Intangibles
The Company's investments in long-lived assets are primarily generation assets, whether in service or under construction. The Company's intangible assets arise from certain acquisitions and consist of acquired PPAs, which are amortized to revenue over the term of the respective PPAs. The Company evaluates the carrying value of these assets whenever indicators of potential impairment exist. Examples of impairment indicators could include significant changes in construction schedules, current period losses combined with a history of losses or a projection of continuing losses, a significant decrease in market prices, and the inability to remarket generating capacity for an extended period. If an indicator exists, the asset is tested for recoverability by comparing the asset carrying value to the sum of the undiscounted expected future cash flows directly attributable to the asset. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determined and a loss is recorded. A high degree of judgment is required in developing estimates related to these evaluations, which are based on projections of various factors, including the following:
Future demand for electricity based on projections of economic growth and estimates of available generating capacity;
Future power and natural gas prices, which have been quite volatile in recent years; and
Future operating costs.
Acquisition Accounting
The Company acquires generation assets as part of its overall growth strategy. For acquisitions that meet the definition of a business, the Company includes the operations in its consolidated financial statements from the respective date of acquisition. The purchase price, including contingent consideration, if any, of each acquisition is allocated based on the fair value of the identifiable assets and liabilities, including the identification of any intangible assets. Assets acquired that do not meet the definition of a business are accounted for as asset acquisitions. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired. Any due diligence or transition costs incurred by the Company for successful or potential acquisitions are expensed as incurred.
Investment Tax Credits
Under current tax legislation, certain construction costs related to renewable generating assets are eligible for federal ITCs. A high degree of judgment is required in determining which construction expenditures qualify for federal ITCs and estimates of eligible costs which, as they relate to acquisitions, may not be finalized until the allocation of purchase price to assets has been finalized. See Note 1 to the financial statements under "Income and Other Taxes" for additional information.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The Company's ongoing evaluation of revenue streams and related contracts includes the evaluation of identified revenue streams tied to longer term contractual arrangements, such as certain capacity payments under PPAs that are expected to be excluded from the scope of ASC 606 and included in the scope of the current leasing guidance (ASC Topic 840).
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. However, given the Company's core activities of selling generation capacity and energy to high credit rated customers, the Company currently does not expect the new standard to

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

have a significant impact to net income. The Company has not elected a transition method as the ultimate impact of the new standard has not yet been determined.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
On November 17, 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statement of cash flows. Upon adoption, the net change in cash and cash equivalents during the period will include amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to each period presented. The Company does not intend to adopt the guidance early. The adoption of ASU 2016-18 will not have a material impact on the financial statements of the Company.
FINANCIAL CONDITION AND LIQUIDITY
Overview
The Company's financial condition remained stable at December 31, 2016. The Company's cash requirements primarily consist of funding ongoing business operations, common stock dividends and distributions to noncontrolling interests, capital expenditures, and debt maturities. Capital expenditures and other investing activities may include investments in acquisitions or new construction associated with the Company's overall growth strategy and to maintain the existing generation fleet's performance. Operating cash flows, which may include the utilization of unutilized tax credits, will only provide a portion of the Company's cash needs. For the three-year period from 2017 through 2019, the Company's projected dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. The Company plans to finance future cash needs in excess of its operating cash flows primarily through debt issuances and equity contributions from Southern Company. The Company intends to continue to monitor its access to short-term and long-term capital markets as well as bank credit agreements as needed to meet its future capital and liquidity needs. See "Sources of Capital" herein for additional information on lines of credit.
Net cash provided from operating activities totaled $339 million in 2016, a decrease of $664 million compared to 2015. The decrease in net cash provided from operating activities was primarily due to an increase in unutilized ITCs and PTCs. As of December 31, 2016, the Company had $1.7 billion of unutilized ITCs and PTCs which are not expected to be fully utilized until 2022. See FUTURE EARNINGS POTENTIAL – "Income Tax Matters – Tax Credits" herein for additional information. Net cash provided from operating activities totaled $1.0 billion in 2015 and $603 million in 2014. This increase was primarily due to an increase in income tax benefits received and increased revenues from new PPAs.
Net cash used for investing activities totaled $4.8 billion, $2.5 billion, and $814 million in 2016, 2015, and 2014, respectively, and was primarily due to acquisitions and the construction of renewable and natural gas facilities. See FUTURE EARNINGS POTENTIAL – "Acquisitions" and "Construction Projects" herein for additional information.
Net cash provided from financing activities totaled $4.7 billion, $2.3 billion, and $217 million in 2016, 2015, and 2014, respectively. Net cash provided from financing activities in 2016 was primarily due to the issuance of additional senior notes and capital contributions from Southern Company. Net cash provided from financing activities in 2015 was due to the issuance of additional senior notes and a 13-month bank loan. Net cash provided from financing activities in 2014 was primarily due to the issuance of commercial paper.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Significant balance sheet changes include a $5.5 billion increase in plant in service and a $739 million decrease in CWIP primarily due to new solar and wind facilities being acquired or placed in service. In addition, ITC benefits that are deferred and amortized over the asset lives increased $950 million as a result of new solar facilities being placed in service. Other significant changes include a $2.3 billion increase in long-term debt due to issuances of senior notes and a $1.8 billion increase in paid in capital due to equity contributions from Southern Company, both primarily to fund acquisitions and construction projects.
Sources of Capital
The Company plans to obtain the funds required for acquisitions, construction, development, and other purposes from operating cash flows, short-term debt, securities issuances, term loans, and equity contributions from Southern Company. However, the amount, type, and timing of any future financings, if needed, will depend upon prevailing market conditions, regulatory approval, and other factors. With respect to the public offering of securities, the Company (excluding its subsidiaries) issues and offers debt registered on registration statements filed with the SEC under the Securities Act of 1933, as amended.
The Company's current liabilities sometimes exceed current assets due to the use of short-term debt as a funding source, and construction payables, as well as fluctuations in cash needs, due to both seasonality and the stage of acquisitions and construction projects. In 2017, the Company expects to utilize the debt capital markets, bank term loans, and commercial paper markets as the source of funds for the majority of its debt maturities, which includes the maturity of $500 million aggregate principal amount of Series 2015D 1.85% Senior Notes due December 1, 2017.
The Company obtains financing separately without credit support from any affiliate. To meet liquidity and capital resource requirements, the Company had at December 31, 2016 cash and cash equivalents of approximately $1.1 billion.
The Company believes the need for working capital can be adequately met by utilizing the commercial paper program and credit facilities, as discussed below, as well as bank term loans and operating cash flows.
The Company's commercial paper program is used to finance acquisition and construction costs related to electric generating facilities and for general corporate purposes, including maturing debt. The Company's subsidiaries are not issuers under the commercial paper program.
Details of commercial paper were as follows:
 
Commercial Paper at the
End of the Period
 
Commercial Paper During the Period (*)
 Amount Outstanding Weighted Average Interest Rate Average Amount Outstanding Weighted Average Interest Rate Maximum Amount Outstanding
 (in millions)   (in millions)   (in millions)
December 31, 2016$
 N/A $56
 0.8% $310
December 31, 2015$
 N/A $166
 0.5% $385
December 31, 2014$195
 0.4% $54
 0.4% $445
(*)Average and maximum amounts are based upon daily balances during the twelve-month periods ended December 31, 2016, 2015, and 2014.
Company Credit Facilities
At December 31, 2016, the Company had a committed credit facility (Facility) of $600 million expiring in 2020, of which $78 million has been used for letters of credit and $522 million remains unused. The Company's subsidiaries are not borrowers under the Facility. Proceeds from the Facility may be used for working capital and general corporate purposes as well as liquidity support for the Company's commercial paper program. Subject to applicable market conditions, the Company expects to renew or replace the Facility, as needed, prior to expiration. In connection therewith, the Company may extend the maturity date and/or increase or decrease the lending commitment thereunder. See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
The Facility, as well as the Company's term loan agreement, contains a covenant that limits the ratio of debt to capitalization (as defined in the Facility) to a maximum of 65% and contains a cross default provision that is restricted only to indebtedness of the Company. For purposes of this definition, debt excludes any project debt incurred by certain subsidiaries of the Company to the extent such debt is non-recourse to the Company, and capitalization excludes the capital stock or other equity attributable to such subsidiary. The Company is currently in compliance with all covenants in the Facility.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

In December 2016, the Company entered into an agreement for a $120 million continuing letter of credit facility for standby letters of credit expiring in 2019. At December 31, 2016, the total amount available under the facility was $82 million. The Company's subsidiaries are not parties to the facility.
Subsidiary Project Credit Facilities
In connection with the construction of solar facilities by RE Tranquillity LLC, RE Roserock LLC, and RE Garland Holdings LLC, indirect subsidiaries of the Company, each subsidiary entered into separate credit agreements (Project Credit Facilities), which were non-recourse to the Company (other than the subsidiary party to the agreement). Each Project Credit Facility provided (a) a senior secured construction loan credit facility, (b) a senior secured bridge loan facility, and (c) a senior secured letter of credit facility that was secured by the membership interests of the respective project company, with proceeds directed to finance project costs related to the respective solar facilities. Each Project Credit Facility was secured by the assets of the applicable project subsidiary and membership interests of the applicable project subsidiary. The Tranquillity and Garland Project Credit Facilities were fully repaid on October 14, 2016 and December 29, 2016, respectively. The table below summarizes the Roserock Project Credit Facility as of December 31, 2016, which was extended to and fully repaid on January 31, 2017.
Project Construction Loan Facility Bridge Loan Facility Total Loan Facility Loan Facility Undrawn Letter of Credit Facility Letter of Credit Facility Undrawn
  (in millions)
Roserock $63
 $180
 $243
 $34
 $23
 $16
The Project Credit Facilities had total amounts outstanding as of December 31, 2016 of $209 million at a weighted average interest rate of 2.1%. For the year ended December 31, 2016, the Project Credit Facilities had a maximum amount outstanding of $828 million and an average amount outstanding of $566 million at a weighted average interest rate of 2.1%.
Furthermore, in connection with the acquisition of the Henrietta solar facility on July 1, 2016, a subsidiary of the Company assumed a $217 million construction loan, which was fully repaid in September 2016. During this period, the credit agreement had a maximum amount outstanding of $217 million and an average amount outstanding of $137 million at a weighted average interest rate of 2.2%.
Financing Activities
Senior Notes
In June 2016, the Company issued €600 million aggregate principal amount of Series 2016A 1.00% Senior Notes due June 20, 2022 and €500 million aggregate principal amount of Series 2016B 1.85% Senior Notes due June 20, 2026. The net proceeds are being allocated to renewable energy generation projects. The Company's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through cross-currency swaps, mitigating foreign currency exchange risk associated with the interest and principal payments. See Note 9 to the financial statements under "Foreign Currency Derivatives" for additional information.
In September 2016, the Company issued $290 million aggregate principal amount of Series 2016C 2.75% Senior Notes due September 20, 2023. The proceeds were used for general corporate purposes, including the Company's growth strategy and continuous construction program, as well as repayment of amounts outstanding under the Project Credit Facilities.
In November 2016, the Company issued $600 million aggregate principal amount of Series 2016D 1.95% Senior Notes due December 15, 2019, $300 million aggregate principal amount of Series 2016E 2.50% Senior Notes due December 15, 2021, and $400 million aggregate principal amount of Series 2016F 4.95% Senior Notes due December 15, 2046. The net proceeds of the Series 2016D and the Series 2016E Senior Notes are being allocated to renewable energy generation projects. The proceeds of the Series 2016F Senior Notes were used to redeem, in December 2016, all of the $200 million aggregate principal amount of the Company's Series E 6.375% Senior Notes due November 15, 2036 and to repay outstanding short-term indebtedness.
In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Company plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Other Debt
In September 2016, the Company repaid $80 million of an outstanding $400 million floating rate bank loan and extended the maturity date of the remaining $320 million from September 2016 to September 2018. In addition, the Company entered into a

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

$60 million aggregate principal amount floating rate bank loan bearing interest based on one-month LIBOR due September 2017. The proceeds were used to repay existing indebtedness and for other general corporate purposes.
During 2016, the Company repaid $6 million and issued $5 million of long-term notes payable to TRE.
In addition, during 2016, the Company issued a total of $89 million in letters of credit under the Company's credit facilities.
Credit Rating Risk
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change to BBB and/or Baa2 or below. These contracts are for physical electricity purchases and sales, fuel transportation and storage, energy price risk management, transmission, and foreign currency risk management.
The maximum potential collateral requirements under these contracts at December 31, 2016 were as follows:
Credit RatingsMaximum Potential Collateral Requirements
 (in millions)
At BBB and/or Baa2$38
At BBB- and/or Baa3$411
At BB+ and/or Ba1 (*)
$1,167
(*)
Any additional credit rating downgrades at or below BB- and/or Ba3 could increase collateral requirements up to an additional $91 million.
Included in these amounts are certain agreements that could require collateral in the event that Alabama Power or Georgia Power has a credit rating change to below investment grade. Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the ability of the Company to access capital markets and would be likely to impact the cost at which it does so.
In addition, the Company has a PPA that could require collateral, but not accelerated payment, in the event of a downgrade of the Company's credit. The PPA requires credit assurances without stating a specific credit rating. The amount of collateral required would depend upon actual losses resulting from a credit downgrade.
On January 10, 2017, S&P revised its credit rating outlook for the Company from negative to stable.
Market Price Risk
The Company is exposed to market risks, primarily commodity price risk, interest rate risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the Company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the consolidated balance sheets as either assets or liabilities and are presented on a gross basis. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.
At December 31, 2016, the Company had $380 million of long-term variable rate notes outstanding. The effect on annualized interest expense related to variable interest rate exposure if the Company sustained a 100 basis point change in interest rates is immaterial. Since a significant portion of outstanding indebtedness bears interest at fixed rates, the Company is not aware of any facts or circumstances that would significantly affect exposure on existing indebtedness in the near term. However, the impact on future financing costs cannot be determined at this time.
The Company had foreign currency denominated debt of €1.1 billion at December 31, 2016. The Company has mitigated its exposure to foreign currency exchange rate risk through the use of foreign currency swaps converting all interest and principal payments to fixed-rate U.S. dollars.
Because energy from the Company's facilities is primarily sold under long-term PPAs with tolling agreements and provisions shifting substantially all of the responsibility for fuel cost to the counterparties, the Company's exposure to market volatility in

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

commodity fuel prices and prices of electricity is generally limited. However, the Company has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity.
For the years ended December 31, 2016 and 2015, the changes in fair value of energy-related derivative contracts associated with both power and natural gas positions were as follows:
 20162015
 (in millions)
Contracts outstanding at the beginning of period, assets (liabilities), net$1
$2
Contracts realized or settled(3)(1)
Current period changes (*)
18

Contracts outstanding at the end of period, assets (liabilities), net$16
$1
(*)Current period changes also include changes in the fair value of new contracts entered into during the period, if any.
For the years ending December 31, 2016 and 2015, the changes in contracts outstanding were attributable to both the volume and the prices of power and natural gas as follows:
 20162015
Power – net sold  
MWH (in millions)6.1
1.8
Weighted average contract cost per MWH above (below) market prices (in dollars)$1.45
$(0.08)
Gas – net purchased  
Commodity - mmBtu27.1
9.6
Commodity - weighted average contract cost per mmBtu above (below) market prices (in dollars)$(0.27)$(0.14)
Gains and losses on energy-related derivatives designated as cash flow hedges which are used by the Company to hedge anticipated purchases and sales are initially deferred in OCI before being recognized in income in the same period as the hedged transactions are reflected in earnings. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the consolidated statements of income as incurred.
The Company uses over-the-counter contracts that are not exchange traded but are fair valued using prices which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 8 to the financial statements for further discussion of fair value measurements. The energy-related derivative contracts outstanding at December 31, 2016 all mature in 2017.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by S&P and Moody's or with counterparties who have posted collateral to cover potential credit exposure. The Company has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk. Therefore, the Company does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance. See Note 1 to the financial statements under "Financial Instruments" and Note 9 to the financial statements for additional information.
Capital Requirements and Contractual Obligations
The capital program of the Company is currently estimated to total $1.6 billion each year from 2017 through 2021. The capital program is subject to periodic review and revision. These amounts include estimates for potential plant acquisitions and new construction. In addition, the capital program includes capital improvements and work to be performed under LTSAs. Planned expenditures for plant acquisitions may vary materially due to market opportunities and the Company's ability to execute its growth strategy. Actual construction costs may vary from these estimates because of numerous factors such as: changes in business conditions; changes in the expected environmental compliance program; changes in environmental statutes and regulations; the outcome of any legal challenges to the environmental rules; changes in FERC rules and regulations; changes in load projections; changes in legislation; the cost and efficiency of construction labor, equipment, and materials; project scope and design changes; and the cost of capital. See Note 2 to the financial statements for additional information.
In addition, TRE can require the Company to purchase its redeemable noncontrolling interests in STR, which owns various solar facilities contracted under long-term PPAs, at fair market value pursuant to the partnership agreement and SunPower can require the Company to purchase its redeemable noncontrolling interest in Boulder 1 at fair market value until April 30, 2017. At December 31, 2016, the aggregate redeemable noncontrolling interests totaled $164 million on the Company's balance sheet.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Other funding requirements related to obligations associated with scheduled maturities of long-term debt, as well as the related interest, leases, derivative obligations, unrecognized tax benefits, and other purchase commitments are detailed in the contractual obligations table that follows. See Notes 1, 5, 6, 7, and 9 to the financial statements for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Contractual Obligations
Contractual obligations at December 31, 2016 were as follows:
 2017 
2018-
2019
 
2020-
2021
 
After
2021
 Total
 (in millions)
Long-term debt(a) —
         
Principal$561
 $1,270
 $600
 $3,321
 $5,752
Interest184
 335
 294
 1,667
 2,480
Financial derivative obligations(b)
5
 
 
 
 5
Operating leases(c)
18
 39
 40
 762
 859
Unrecognized tax benefits(d)
17
 
 
 
 17
Purchase commitments —         
Capital(e)
1,525
 3,080
 3,064
 
 7,669
Fuel(f)
515
 684
 393
 99
 1,691
Purchased power(g)
39
 81
 83
 
 203
Other(h)
223
 200
 514
 2,007
 2,944
Total$3,087
 $5,689
 $4,988
 $7,856
 $21,620
(a)All amounts are reflected based on final maturity dates and include the effects of interest rate derivatives employed to manage interest rate risk and effects of foreign currency swaps employed to manage foreign currency exchange rate risk. Included in debt principal is $82 million related to the foreign currency hedge of €1.1 billion. The Company plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
(b)For additional information, see Notes 1 and 9 to the financial statements.
(c)Operating lease commitments include certain land leases for solar and wind facilities that are subject to annual price escalation based on indices. See Note 7 to the financial statements under "Commitments" for additional information.
(d)See Note 5 to the financial statements under "Unrecognized Tax Benefits" for additional information.
(e)The Company provides estimated capital expenditures for a five-year period, including capital expenditures associated with environmental regulations. Amounts represent current estimates of total expenditures, excluding capital expenditures covered under LTSAs which are reflected in "Other." See Note (h) below. At December 31, 2016, significant purchase commitments were outstanding in connection with the construction program.
(f)Primarily includes commitments to purchase, transport, and store natural gas fuel. Amounts reflected are based on contracted cost and may contain provisions for price escalation. Amounts reflected for natural gas purchase commitments are based on various indices at the time of delivery and have been estimated based on the New York Mercantile Exchange future prices at December 31, 2016.
(g)Purchased power commitments will be resold under a third party agreement at cost.
(h)Includes commitments related to LTSAs, operation and maintenance agreements, and transmission. LTSAs include price escalation based on inflation indices. Transmission commitments are based on the Southern Company system's current tariff rate for point-to-point transmission.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Cautionary Statement Regarding Forward-Looking Statements
The Company's 2016 Annual Report contains forward-looking statements. Forward-looking statements include, among other things, statements concerning the strategic goals for the Company's business, economic conditions, fuel and environmental cost recovery, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, financing activities, estimated sales and purchases under power sale and purchase agreements, timing of expected future capacity need in existing markets, completion dates of construction projects, filings with federal regulatory authorities, impact of the PATH Act, federal income tax benefits, and estimated construction and other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impact of recent and future federal and state regulatory changes, including environmental laws regulating emissions, discharges, and disposal to air, water, and land, and also changes in tax and other laws and regulations to which the Company is subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
the effects, extent, and timing of the entry of additional competition in the markets in which the Company operates;
variations in demand for electricity, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources such as self-generation and distributed generation technologies, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of fuels;
effects of inflation;
the ability to control costs and avoid cost overruns during the development and construction of generating facilities, to construct facilities in accordance with the requirements of permits and licenses, and to satisfy any environmental performance standards, including the requirements of tax credits and other incentives;
advances in technology;
state and federal rate regulations;
the ability to successfully operate generating facilities and the successful performance of necessary corporate functions;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to the Company;
the ongoing renewable energy partnerships and development agreements;
the ability of counterparties of the Company to make payments as and when due and to perform as required;
the ability to obtain new short- and long-term contracts with wholesale customers;
the direct or indirect effect on the Company's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;
changes in the Company's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general;
the ability of the Company to obtain additional generating capacity (or sell excess generating capacity) at competitive prices;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;
the direct or indirect effects on the Company's business resulting from incidents affecting the U.S. electric grid or operation of generating resources;

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (including the Form 10-K) filed by the Company from time to time with the SEC.
The Company expressly disclaims any obligation to update any forward-looking statements.


CONSOLIDATED STATEMENTS OF INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Southern Power Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Revenues:     
Wholesale revenues, non-affiliates$1,146
 $964
 $1,116
Wholesale revenues, affiliates419
 417
 383
Other revenues12
 9
 2
Total operating revenues1,577
 1,390
 1,501
Operating Expenses:     
Fuel456
 441
 596
Purchased power, non-affiliates81
 72
 105
Purchased power, affiliates21
 21
 66
Other operations and maintenance354
 260
 237
Depreciation and amortization352
 248
 220
Taxes other than income taxes23
 22
 22
Total operating expenses1,287
 1,064
 1,246
Operating Income290
 326
 255
Other Income and (Expense):     
Interest expense, net of amounts capitalized(117) (77) (89)
Other income (expense), net6
 1
 6
Total other income and (expense)(111) (76) (83)
Earnings Before Income Taxes179
 250
 172
Income taxes (benefit)(195) 21
 (3)
Net Income374
 229
 175
Less: Net income attributable to noncontrolling interests36
 14
 3
Net Income Attributable to the Company$338
 $215
 $172
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
For the Years Ended December 31, 2016, 2015, and 2014
Southern Power Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Net Income$374
 $229
 $175
Other comprehensive income (loss):     
Qualifying hedges:     
Changes in fair value, net of tax of $(17), $-, and $-, respectively(27) 
 
Reclassification adjustment for amounts included in net income,
net of tax of $36, $-, and $-, respectively
58
 1
 
Total other comprehensive income31
 1
 
Less: Comprehensive income attributable to noncontrolling interests36
 14
 3
Comprehensive Income Attributable to the Company$369
 $216
 $172
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
For the Years Ended December 31, 2016, 2015, and 2014
Southern Power Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
 (in millions)
Operating Activities:     
Net income$374
 $229
 $175
Adjustments to reconcile net income
to net cash provided from operating activities —
     
Depreciation and amortization, total370
 254
 225
Deferred income taxes(1,063) 42
 (168)
Investment tax credits
 162
 74
Amortization of investment tax credits(37) (19) (11)
Collateral deposits(102) 
 
Accrued income taxes, non-current(109) 109
 
Other, net
 (2) (10)
Changes in certain current assets and liabilities —     
-Receivables(54) 18
 (26)
-Prepaid income taxes(29) (26) 35
-Other current assets4
 (4) (8)
-Accounts payable27
 (19) 30
-Accrued taxes940
 269
 284
-Other current liabilities18
 (10) 3
Net cash provided from operating activities339
 1,003
 603
Investing Activities:     
Business acquisitions(2,294) (1,719) (731)
Property additions(2,114) (1,005) (21)
Change in construction payables(57) 251
 
Investment in restricted cash(733) (159) 
Distribution of restricted cash736
 154
 
Payments pursuant to LTSA and for equipment not yet received(350) (82) (61)
Other investing activities15
 22
 (1)
Net cash used for investing activities(4,797) (2,538) (814)
Financing Activities:     
Increase (decrease) in notes payable, net73
 (58) 195
Proceeds —     
Capital contributions1,850
 646
 146
Senior notes2,831
 1,650
 
Other long-term debt65
 402
 10
Redemptions —     
Senior notes(200) (525) 
Other long-term debt(86) (4) (10)
Distributions to noncontrolling interests(57) (18) (1)
Capital contributions from noncontrolling interests682
 341
 8
Purchase of membership interests from noncontrolling interests(129) 
 
Payment of common stock dividends(272) (131) (131)
Other financing activities(30) (13) 
Net cash provided from financing activities4,727
 2,290
 217
Net Change in Cash and Cash Equivalents269
 755
 6
Cash and Cash Equivalents at Beginning of Year830
 75
 69
Cash and Cash Equivalents at End of Year$1,099
 $830
 $75
Supplemental Cash Flow Information:     
Cash paid (received) during the period for —     
Interest (net of $44, $14, and $- capitalized, respectively)$89
 $74
 $85
Income taxes (net of refunds and investment tax credits)116
 (518) (220)
Noncash transactions —     
Accrued property additions at year-end251
 257
 1
Acquisitions461
 
 229
Capital contributions from noncontrolling interests
 
 221

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2016 and 2015
Southern Power Company and Subsidiary Companies 2016 Annual Report
Assets2016
 2015
 (in millions)
Current Assets:   
Cash and cash equivalents$1,099
 $830
Receivables —   
Customer accounts receivable102
 75
Other accounts receivable34
 19
Affiliated57
 30
Fossil fuel stock15
 16
Materials and supplies337
 63
Prepaid income taxes74
 45
Other current assets39
 30
Total current assets1,757
 1,108
Property, Plant, and Equipment:   
In service12,728
 7,275
Less accumulated provision for depreciation1,484
 1,248
Plant in service, net of depreciation11,244
 6,027
Construction work in progress398
 1,137
Total property, plant, and equipment11,642
 7,164
Other Property and Investments:   
Intangible assets, net of amortization of $22 and $12
at December 31, 2016 and December 31, 2015, respectively
436
 319
Total other property and investments436
 319
Deferred Charges and Other Assets:   
Prepaid long-term service agreements101
 166
Accumulated deferred income taxes594
 
Other deferred charges and assets — affiliated13
 9
Other deferred charges and assets — non-affiliated626
 139
Total deferred charges and other assets1,334
 314
Total Assets$15,169
 $8,905
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
At December 31, 2016 and 2015
Southern Power Company and Subsidiary Companies 2016 Annual Report
Liabilities and Stockholders' Equity2016
 2015
 (in millions)
Current Liabilities:   
Securities due within one year$560
 $403
Notes payable209
 137
Accounts payable —   
Affiliated88
 66
Other278
 327
Accrued taxes —   
Accrued income taxes148
 198
Other accrued taxes7
 5
Accrued interest36
 23
Acquisitions payable461
 
Contingent consideration46
 36
Other current liabilities70
 44
Total current liabilities1,903
 1,239
Long-Term Debt:   
Senior notes —   
1.85% due 2017
 500
1.50% due 2018350
 350
1.95% due 2019600
 
2.375% due 2020300
 300
2.50% due 2021300
 
1.00% to 6.375% due 2022-20463,224
 1,575
Other long-term debt —   
Variable rate (1.88% at 1/1/17) due 2018320
 
Variable rate (3.75% at 1/1/17) due 2032-203615
 13
Unamortized debt premium (discount), net(12) 
Unamortized debt issuance expense(29) (19)
Long-term debt5,068
 2,719
Deferred Credits and Other Liabilities:   
Accumulated deferred income taxes152
 601
Accumulated deferred investment tax credits1,839
 889
Accrued income taxes, non-current
 109
Asset retirement obligations64
 21
Deferred capacity revenues — affiliated17
 17
Other deferred credits and liabilities287
 3
Total deferred credits and other liabilities2,359
 1,640
Total Liabilities9,330
 5,598
Redeemable Noncontrolling Interests164
 43
Common Stockholder's Equity:   
Common stock, par value $0.01 per share —   
Authorized — 1,000,000 shares   
Outstanding — 1,000 shares
 
Paid-in capital3,671
 1,822
Retained earnings724
 657
Accumulated other comprehensive income35
 4
Total common stockholder's equity4,430
 2,483
Noncontrolling Interests1,245
 781
Total Stockholders' Equity5,675
 3,264
Total Liabilities and Stockholders' Equity$15,169
 $8,905
Commitments and Contingent Matters (See notes)

 
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
For the Years Ended December 31, 2016, 2015, and 2014
Southern Power Company and Subsidiary Companies 2016 Annual Report
 Number of Common Shares Issued Common Stock Paid-In Capital Retained Earnings
 Accumulated Other Comprehensive Income Total Common Stockholder's Equity 
Noncontrolling Interests(*)
 Total
 (in millions)
Balance at December 31, 2013
 $
 $1,029
 $532
 $3
 $1,564
 $
 $1,564
Net income attributable
   to Southern Power

 
 
 172
 
 172
 
 172
Capital contributions from
   parent company

 
 147
 
 
 147
 
 147
Cash dividends on common
   stock

 
 
 (131) 
 (131) 
 (131)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 221
 221
Net loss attributable to
   noncontrolling interests

 
 
 
 
 
 (2) (2)
Balance at December 31, 2014
 
 1,176
 573
 3
 1,752
 219
 1,971
Net income attributable
   to Southern Power

 
 
 215
 
 215
 
 215
Capital contributions from
   parent company

 
 646
 
 
 646
 
 646
Other comprehensive income
 
 
 
 1
 1
 
 1
Cash dividends on common
   stock

 
 
 (131) 
 (131) 
 (131)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 567
 567
Distributions to noncontrolling
   interests

 
 
 
 
 
 (17) (17)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 12
 12
Balance at December 31, 2015
 
 1,822
 657
 4
 2,483
 781
 3,264
Net income attributable
   to Southern Power

 
 
 338
 
 338
 
 338
Capital contributions from
   parent company

 
 1,850
 
 
 1,850
 
 1,850
Other comprehensive income
 
 
 
 31
 31
 
 31
Cash dividends on common
   stock

 
 
 (272) 
 (272) 
 (272)
Capital contributions from
   noncontrolling interests

 
 
 
 
 
 618
 618
Distributions to noncontrolling
   interests

 
 
 
 
 
 (57) (57)
Purchase of membership interests
   from noncontrolling interests

 
 
 
 
 
 (129) (129)
Net income attributable to
   noncontrolling interests

 
 
 
 
 
 32
 32
Other
 
 (1) 1
 $
 
 
 
Balance at December 31, 2016
 $
 $3,671
 $724
 $35
 $4,430
 $1,245
 $5,675
(*)Excludes redeemable noncontrolling interests. See Note 10 to the financial statements under "Noncontrolling Interests" for additional information.
The accompanying notes are an integral part of these consolidated financial statements.


NOTES TO FINANCIAL STATEMENTS
Southern Power Company and Subsidiary Companies 2016 Annual Report




Index to the Notes to Financial Statements



NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
Southern Power Company is a wholly-owned subsidiary of Southern Company, which is also the parent company of four traditional electric operating companies, Southern Company Gas (as of July 1, 2016), SCS, Southern LINC, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure, Inc. (PowerSecure) (as of May 9, 2016), and other direct and indirect subsidiaries. The traditional electric operating companies – Alabama Power, Georgia Power, Gulf Power, and Mississippi Power – are vertically integrated utilities providing electric service in four Southeastern states. Southern Power Company and its subsidiaries (the Company) construct, acquire, own, and manage generation assets, including renewable energy projects, and sell electricity at market-based rates in the wholesale market. Southern Company Gas distributes natural gas through utilities in seven states and is involved in several other complementary businesses including gas marketing services, wholesale gas services, and gas midstream operations. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern LINC provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cable services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company's investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants. PowerSecure is a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure.
The preparation of consolidated financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates. Certain prior years' data presented in the consolidated financial statements have been reclassified to conform to the current year presentation.
The consolidated financial statements include the accounts of Southern Power Company and its wholly-owned and majority-owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The Company's ongoing evaluation of revenue streams and related contracts includes the evaluation of identified revenue streams tied to longer term contractual arrangements, such as certain capacity payments under PPAs that are expected to be excluded from the scope of ASC 606 and included in the scope of the current leasing guidance (ASC Topic 840).
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. However, given the Company's core activities of selling generation capacity and energy to high credit rated customers, the Company currently does not expect the new standard to have a significant impact to net income. The Company has not elected a transition method as the ultimate impact of the new standard has not yet been determined.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements and has not yet determined its ultimate impact.
On November 17, 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statement of cash flows. Upon adoption, the net change in cash and cash equivalents during the period will include amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to each period presented. The Company does not intend to adopt the guidance early. The adoption of ASU 2016-18 will not have a material impact on the financial statements of the Company.
Affiliate Transactions
Total revenues from all PPAs with affiliates, included in wholesale revenue affiliates on the consolidated statements of income, were $258 million, $219 million, and $153 million for the years ended December 31, 2016, 2015, and 2014, respectively. Included within these revenues were affiliate PPAs accounted for as operating leases, which totaled $109 million in both 2016 and 2015 and $75 million in 2014.
The Company has an agreement with SCS under which the following services are rendered to the Company at amounts in compliance with FERC regulation: general and design engineering, purchasing, accounting, finance and treasury, tax, information technology, marketing, auditing, insurance and pension administration, human resources, systems and procedures, digital wireless communications, labor, and other services with respect to business and operations, construction management, and transactions associated with the Southern Company system's fleet of generating units. Because the Company has no employees, all employee-related charges are rendered at amounts in compliance with FERC regulation under agreements with SCS. Costs for all of these services from SCS totaled approximately $193 million, $146 million, and $126 million for the years ended December 31, 2016, 2015, and 2014, respectively. Of these costs, approximately $173 million, $138 million, and $125 million for the years ended December 31, 2016, 2015, and 2014, respectively, were charged to other operations and maintenance expenses; the remainder was capitalized to property, plant, and equipment. Cost allocation methodologies used by SCS prior to the repeal of the Public Utility Holding Company Act of 1935, as amended, were approved by the SEC. Subsequently, additional cost allocation methodologies have been reported to the FERC and management believes they are reasonable. The FERC permits services to be rendered at cost by system service companies.
The Company also has several agreements with SCS for transmission services. Transmission services purchased from SCS totaled $11 million in each of the years ended December 31, 2016 and 2015 and $7 million for the year ended December 31, 2014, and were charged to other operations and maintenance in the consolidated statements of income. All charges were billed to the Company based on the Southern Company Open Access Transmission Tariff as filed with the FERC.
Prior to Southern Company's acquisition of Southern Company Gas, SCS, as agent for the Company, had agreements with various subsidiaries of Southern Company Gas to purchase natural gas. For the period subsequent to Southern Company's acquisition of Southern Company Gas, from July 1, 2016 through December 31, 2016, natural gas purchases made by the Company from Southern Company Gas' subsidiaries were approximately $17 million and are included in fuel expense on the consolidated statements of income.
On September 1, 2016, Southern Company Gas acquired a 50% equity interest in Southern Natural Gas Company, L.L.C. (SNG). Prior to completion of the acquisition, SCS, as agent for the Company, had entered into a long-term interstate natural gas transportation agreement with SNG. The interstate transportation service provided to the Company by SNG pursuant to this agreement is governed by the terms and conditions of SNG's natural gas tariff and is subject to FERC regulation. For the period subsequent to Southern Company Gas' investment in SNG through December 31, 2016, transportation costs under this agreement were approximately $7 million.
In 2016, the Company sold a turbine rotor assembly to Gulf Power for approximately $7 million.
The Company and the traditional electric operating companies may jointly enter into various types of wholesale energy, natural gas, and certain other contracts, either directly or through SCS as agent. Each participating company may be jointly and severally liable for the obligations incurred under these agreements. See "Revenues" herein for additional information.
The Company and the traditional electric operating companies generally settle amounts related to the above transactions on a monthly basis in the month following the performance of such services or the purchase or sale of electricity.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Acquisition Accounting
The Company acquires generationAt the time of an acquisition, management will assess whether acquired assets as partand activities meet the definition of its overall growth strategy.a business. For acquisitions that meet the definition of a business, the Company includes the operations in its consolidated financial statementsoperating results from the respective date of acquisition.acquisition are included in the acquiring entity's financial statements. The purchase price, including any contingent consideration, if any, of each acquisition is allocated based on the fair value of the identifiable assets acquired and liabilities.liabilities assumed (including any intangible assets). Assets acquired that do not meet the definition of a business are accounted for as an asset acquisitions.acquisition. The purchase price of each asset acquisition is allocated based on the relative fair value of assets acquired.
Determining the fair value of assets acquired and liabilities assumed requires management judgment and management may engage independent valuation experts to assist in this process. Fair values are determined by using market participant assumptions and typically include the timing and amounts of future cash flows, incurred construction costs, the nature of acquired contracts, discount rates, power market prices, and expected asset lives. Any due diligence or transition costs incurred by the Company for successfulpotential or potentialsuccessful acquisitions are expensed as incurred. Contingent
Historically, contingent consideration recognized at the time of each acquisition primarily relates to fixed amounts due to the seller once the facilityan acquired construction project is successfully placed in service. To the extent there is anyFor contingent consideration with variable payments, the Companymanagement fair values the arrangement with any changes recorded in netthe statements of income. See Note 813 for additional fair value information.
RevenuesDevelopment Costs
The Company sells capacity at rates specified under contractual terms for long-term PPAs. These PPAsFor Southern Power, development costs are generally accounted for as operating leases, non-derivatives, or normal sale derivatives. Capacity revenues from PPAs classified as operating leases are recognizedcapitalized once a project is probable of completion, primarily based on a straight-line basis overreview of its economics and operational feasibility, as well as the termstatus of the agreement. Capacity revenues from PPAs classified as non-derivatives or normal sales are recognized at the lesser of the levelized amount or the amount billable under the contract over the respective contract periods. When multiple contracts exist with the same counterparty, the revenues from each contract are accounted for as separate arrangements. All capacity revenuespower off-take agreements and regulatory approvals, if applicable. Southern Power's capitalized development costs are included in operating revenues.
The Company may also enter into contractsCWIP on the balance sheets. All of Southern Power's development costs incurred prior to sell short-term capacitythe determination that a project is probable of completion are expensed as incurred and included in other operations and maintenance expense in the wholesale electricity markets. These sales are generally classified as mark-to-market derivatives and net unrealized gains (losses) on such contracts are recorded in wholesale revenues. See Note 9 for additional information.
Energy revenues and other contingent revenues are recognized in the period the energystatements of income. If it is delivered or the servicedetermined that a project is rendered. Transmission revenues and other fees are recognized as earned as other operating revenues. See "Financial Instruments" herein for additional information.
Significant portionsno longer probable of the Company's revenues have been derived from certain customers pursuant to PPAs. The following table shows the percentagecompletion, any of total revenues for the top three customers:
 2016 2015 2014
Georgia Power16.5% 15.8% 10.1%
Duke Energy Corporation7.8% 8.2% 9.1%
San Diego Gas & Electric Company5.7% 6.1% 2.9%
FPL% 10.7% 9.7%
Fuel Costs
FuelSouthern Power's capitalized development costs are expensed as the fuel is used. Fuel costs also include emissions allowances which are expensed as the emissions occur.
Income and Other Taxes
The Company uses the liability method of accounting for deferred income taxesincluded in other operations and provides deferred income taxes for all significant income tax temporary differences.
Under current tax regulation, certain projects related to the construction of renewable facilities are eligible for federal ITCs. The Company estimates eligible costs which, as they relate to acquisitions, may not be finalized until the allocation of the purchase price to assets has been finalized. The Company applies the deferred method to ITCs as opposed to the flow-through method. Under the deferred method the ITCs are recorded as a deferred credit and amortized to income tax expense over the life of the respective asset. Furthermore, the tax basis of the asset is reduced by 50% of the ITCs received, resulting in a net deferred tax asset. The Company has elected to recognize the tax benefit of this basis difference as a reduction to income taxmaintenance expense in the year in which the plant reaches commercial operation. In addition, certain projects are eligible for federal PTCs, which are recorded to income tax expense based on KWH production. Federal ITCs and PTCs available to reduce income taxes payable were not fully utilized during 2016 and will be carried forward and utilized in future years. The Company recognizes tax positions that are "more likely than not"statements of being sustained upon examination by the appropriate taxing authorities. See Note 5 for additional information.income.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Power Company and Subsidiary Companies 20162019 Annual Report

Property, Plant, and Equipment
The Company's depreciable property, plant, and equipment consists primarily of generation assets.
Property, plant, and equipment is stated at original cost or acquired fair value. Original cost includes: materials, direct labor incurred by contractors and affiliated companies, and interest capitalized. Interest is capitalized on qualifying projects during the development and construction period. The cost to replace significant items of property defined as retirement units is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred.
When depreciable property, plant, and equipment is retired, or otherwise disposed of in the normal course of business, the applicable cost and accumulated depreciation is removed and a gain or loss is recognized in the consolidated statements of income.
Depreciation
The Company applies component depreciation, where depreciation is computed principally by the straight-line method over the estimated useful life of the asset. Certain generation assets related to natural gas-fired facilities are depreciated on a units-of-production basis, using hours or starts, to better match outage and maintenance costs to the usage of, and revenues from, these assets.
The primary assets in property, plant, and equipment are generating facilities, which generally have estimated useful lives as follows:
Generating facilityUseful life
Natural gasUp to 45 years
BiomassUp to 40 years
SolarUp to 35 years
WindUp to 30 years
The Company reviews its estimated useful lives and salvage values on an ongoing basis. The results of these reviews could result in changes which could have a material impact on net income in the near term.
Asset Retirement Obligations
Asset retirement obligations (ARO) are computed as the present value of the estimated ultimate costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. The ARO liability primarily relates to the Company's solar and wind facilities, which are located on long-term land leases requiring the restoration of land at the end of the lease. See Note 2 for acquisitions during 2015 and 2016 which contributed to the increased liability.
Details of the AROs included on the consolidated balance sheets are as follows:
 2016  2015 
 (in millions) 
Balance at beginning of year$21
  $13
 
Liabilities incurred42
  7
 
Accretion1
  1
 
Balance at end of year$64
  $21
 

Long-Term Service Agreements
The Company hastraditional electric operating companies and Southern Power have entered into LTSAs for the purpose of securing maintenance support for its natural gas-firedcertain of their generating facilities. The LTSAs cover all planned inspections on the covered equipment, which generally includes the cost of all labor and materials. The LTSAs also obligate the counterparties to cover the costs of unplanned maintenance on the covered equipment subject to limits and scope specified in each contract.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Payments made under the LTSAs prior tofor the performance of any planned inspections or unplanned capital maintenance are recorded as a prepayment in noncurrent assets on the consolidated balance sheets and are recorded as payments pursuant to LTSAs and for equipment not yet received in the statements of cash flows. At the time work is performed, which typically occurs during planned inspections, an appropriate amount is transferred from the prepayment to property, plant, and equipment or charged to expense. The receiptflows as investing activities. Receipts of major parts into materials and supplies inventory prior to planned inspections isare treated as a noncash transaction for purposes oftransactions in the statements of cash flows.
Impairment of Long-Lived Assets and Intangibles
The Company evaluates long-lived Any payments made prior to the work being performed are recorded as prepayments in other current assets and finite-lived intangiblesnoncurrent assets on the balance sheets. At the time work is performed, an appropriate amount is accrued for impairment when eventsfuture payments or changes in circumstances indicate thattransferred from the carrying value of such assets may not be recoverable. The Company's intangible assets consist primarily of certain PPAs acquired, which are amortized over the term of the PPA. The average term of these PPAs is 19 years. The determination of whether an impairment has occurred is based on an estimate of undiscounted future cash flows attributable to the assets,prepayment and recorded as compared with the carrying value of the assets. If the estimate of undiscounted future cash flows is less than the carrying value of the asset, the fair value of the asset is determinedproperty, plant, and a loss is recorded.
Amortization expense for acquired PPAs was $10 million for the year ended December 31, 2016 and $3 million for each of the years ended December 31, 2015 and 2014, and is recorded in operating revenues. The amortization expense for each of the next five years is as follows:
 
Amortization
Expense
 (in millions)
2017$25
201825
201925
202025
202125
equipment or expensed.
Transmission Receivables/Prepayments
As a result of the Company's growth from theSouthern Power's acquisition and construction of generating facilities, the CompanySouthern Power has transmission receivables and/or prepayments representing the portion of interconnection network and transmission upgrades that will be reimbursed to the Company.Southern Power. Upon completion of the related project, transmission costs are generally reimbursed by the interconnection provider within a five-year period and the receivable/prepayments are reduced as payments or services are received.
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Restricted Cash
The use of funds received under credit facilitiesAt December 31, 2019 and 2018, Southern Company Gas had restricted cash held as collateral for Garland, Roserock,worker's compensation, life insurance, and Tranquillity islong-term disability insurance. At December 31, 2018, Georgia Power had restricted for construction purposes. In addition, as a result of the Wake Wind acquisition, cash was received and is restricted for final completion payments related to construction. the redemption of certain pollution control revenue bonds in January 2019. See Note 8 under "Long-term Debt" for additional information.
The aggregate amountfollowing tables provide a reconciliation of cash, cash equivalents, and restricted cash reported within the balance sheets that total to the amounts shown in the statements of cash flows for the Registrants that had restricted cash at December 31, 20162019 and/or 2018:
 
Southern
Company
Southern
Company Gas
 (in millions)
At December 31, 2019  
Cash and cash equivalents$1,975
$46
Restricted cash:



Other accounts and notes receivable3
3
Total cash, cash equivalents, and restricted cash$1,978
$49
 Southern
Company
Georgia
Power
Southern
Company Gas
 (in millions)
At December 31, 2018   
Cash and cash equivalents$1,396
$4
$64
Cash and cash equivalents classified as assets held for sale9


Restricted cash:   
Restricted cash
108

Other accounts and notes receivable114

6
Total cash, cash equivalents, and restricted cash$1,519
$112
$70


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and 2015 was $13Subsidiary Companies 2019 Annual Report

Storm Damage Reserves
Each traditional electric operating company maintains a reserve to cover or is allowed to defer and recover the cost of damages from major storms to its transmission and distribution lines and, for Mississippi Power, the cost of uninsured damages to its generation facilities and other property. Alabama Power and Mississippi Power also have authority based on orders from their state PSCs to accrue certain additional amounts as circumstances warrant. Alabama Power recorded an additional accrual of $84 million in 2019 and $5 million, respectively,0 such additional accruals in 2018 or 2017. There were 0 such additional accruals for Mississippi Power in any year presented. In accordance with their respective state PSC orders, the traditional electric operating companies accrued the following amounts related to storm damage reserves in 2019, 2018, and is included2017:
 
Southern
   Company(a)(b)
Alabama
Power
(b)
Georgia
Power
Mississippi
Power
 (in millions)
2019$170
$139
$30
$1
201874
16
30
1
201741
4
30
3
(a)
Includes accruals at Gulf Power of $26.9 million in 2018 and $3.5 million in 2017. See Note 15 under "Southern Company" for information regarding the sale of Gulf Power.
(b)Includes $39 million applied in 2019 to Alabama Power's NDR from its remaining excess deferred income tax regulatory liability balance in accordance with an Alabama PSC order.
See Note 2 under "Alabama PowerRate NDR," "Georgia PowerStorm Damage Recovery," and "Mississippi PowerSystem Restoration Rider" for additional information regarding each company's storm damage reserve.
Leveraged Leases
A subsidiary of Southern Holdings has several leveraged lease agreements, with original terms ranging up to 45 years, which relate to international and domestic energy generation, distribution, and transportation assets. Southern Company receives federal income tax deductions for depreciation and amortization, as well as interest on long-term debt related to these investments. Southern Company reviews all important lease assumptions at least annually, or more frequently if events or changes in other deferred charges and assets – non-affiliated.
Cash and Cash Equivalents
For purposescircumstances indicate that a change in assumptions has occurred or may occur. These assumptions include the effective tax rate, the residual value, the credit quality of the financial statements, temporarylessees, and the timing of expected tax cash flows. See Note 3 under "Other MattersSouthern Company" for information regarding an impairment charge associated with 1 of the leveraged leases.
On December 30, 2019, Southern Company completed the sale of 1 of its leveraged lease investments are considered cash equivalents. Temporary cash investments are securities with original maturitiesfor approximately $20 million.
Southern Company's net investment in domestic and international leveraged leases consists of 90 days or less.the following at December 31:
 2019 2018
 (in millions)
Net rentals receivable$1,410
 $1,563
Unearned income(622) (765)
Investment in leveraged leases788
 798
Deferred taxes from leveraged leases(238) (255)
Net investment in leveraged leases$550
 $543


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A summary of the components of income from the leveraged leases follows:
 2019 2018 2017
 (in millions)
Pretax leveraged lease income$11
 $25
 $25
Net impact of Tax Reform Legislation
 
 48
Income tax expense
 (6) (9)
Net leveraged lease income$11
 $19
 $64

Materials and Supplies
Materials and supplies includefor the traditional electric operating companies generally includes the average cost of transmission, distribution, and generating plant materials. Materials and supplies for Southern Company Gas generally includes propane gas inventory, fleet fuel, and other materials and supplies. Materials and supplies for Southern Power generally includes the average cost of generating plant materials andmaterials.
Materials are recorded asto inventory when purchased and then expensed or capitalized to property, plant, and equipment, as appropriate, at weighted average cost when installed. In addition, certain major parts are recorded as inventory when acquired and then capitalized at cost when installed to property, plant, and equipment.
Fuel Inventory
Fuel inventory for the traditional electric operating companies includes the average cost of coal, natural gas, oil, transportation, and emissions allowances. Fuel inventory for Southern Power, which is included in other current assets, includes the average cost of oil, natural gas, biomass, and emissions allowances. The Company maintains oilFuel is recorded to inventory for use at several natural gas generating units. The Company has contracts in place for natural gas storage to support normal

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

operations of the Company's natural gas generating units. The Company maintains biomass inventory for use at Plant Nacogdoches. Inventory is maintained using the weighted average cost method. Fuel inventory and emissions allowances are recorded at actual cost when purchased and then expensed, at weighted average cost, as used. Emissions allowances granted by the EPA are included in inventory at zero cost. The traditional electric operating companies recover fuel expense through fuel cost recovery rates approved by each state PSC or, for wholesale rates, the FERC.
Natural Gas for Sale
With the exception of Nicor Gas, the natural gas distribution utilities record natural gas inventories on a WACOG basis. In Georgia's deregulated, competitive environment, Marketers sell natural gas to firm end-use customers at market-based prices. On a monthly basis, Atlanta Gas Light assigns to Marketers the majority of the pipeline storage services that it has under contract, along with a corresponding amount of inventory. Atlanta Gas Light retains and manages a portion of its pipeline storage assets and related natural gas inventories for system balancing and to serve system demand.
Nicor Gas' natural gas inventory is carried at cost on a LIFO basis. Inventory decrements occurring during the year that are restored prior to year end are charged to cost of natural gas at the estimated annual replacement cost. Inventory decrements that are not restored prior to year end are charged to cost of natural gas at the actual LIFO cost of the inventory layers liquidated. The cost of natural gas, including inventory costs, is recovered from customers under a purchased gas recovery mechanism adjusted for differences between actual costs and amounts billed; therefore, LIFO liquidations have no impact on Southern Company's or Southern Company Gas' net income. At December 31, 2019, the Nicor Gas LIFO inventory balance was $161 million. Based on the average cost of gas purchased in December 2019, the estimated replacement cost of Nicor Gas' inventory at December 31, 2019 was $214 million.
Southern Company Gas' gas marketing services, wholesale gas services, and all other segments record inventory at LOCOM, with cost determined on a WACOG basis. For these segments, Southern Company Gas evaluates the weighted average cost of its natural gas inventories against market prices to determine whether any declines in market prices below the WACOG are other than temporary. For any declines considered to be other than temporary, Southern Company Gas recorded LOCOM adjustments to cost of natural gas to reduce the value of its natural gas inventories to market value. LOCOM adjustments for wholesale gas services were $21 million and $10 million during 2019 and 2018, respectively, and immaterial for 2017.
Energy Marketing Receivables and Payables
Southern Company Gas' wholesale gas services provides services to retail gas marketers, wholesale gas marketers, utility companies, and industrial customers. These counterparties utilize netting agreements that enable wholesale gas services to net receivables and payables by counterparty upon settlement. Southern Company Gas' wholesale gas services also nets across product lines and against cash collateral, provided the netting and cash collateral agreements include such provisions. While the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

amounts due from, or owed to, wholesale gas services' counterparties are settled net, they are recorded on a gross basis in the balance sheets as energy marketing receivables and energy marketing payables.
Southern Company Gas' wholesale gas services has trade and credit contracts that contain minimum credit rating requirements. These credit rating requirements typically give counterparties the right to suspend or terminate credit if Southern Company Gas' credit ratings are downgraded to non-investment grade status. Under such circumstances, Southern Company Gas' wholesale gas services would need to post collateral to continue transacting business with some of its counterparties. As of December 31, 2019 and 2018, the required collateral in the event of a credit rating downgrade was $11 million and $30 million, respectively.
Credit policies were established to determine and monitor the creditworthiness of counterparties, including requirements to post collateral or other credit security, as well as the quality of pledged collateral. Collateral or credit security is most often in the form of cash or letters of credit from an investment-grade financial institution, but may also include cash or U.S. government securities held by a trustee. When Southern Company Gas' wholesale gas services is engaged in more than one outstanding derivative transaction with the same counterparty and it also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty combined with a reasonable measure of Southern Company Gas' credit risk. Southern Company Gas' wholesale gas services also uses other netting agreements with certain counterparties with whom it conducts significant transactions.
See "Concentration of Credit Risk" herein for additional information.
Provision for Uncollectible Accounts
The customers of the traditional electric operating companies and the natural gas distribution utilities are billed monthly. For the majority of receivables, a provision for uncollectible accounts is established based on historical collection experience and other factors. For the remaining receivables, if the company is aware of a specific customer's inability to pay, a provision for uncollectible accounts is recorded to reduce the receivable balance to the amount reasonably expected to be collected. If circumstances change, the estimate of the recoverability of accounts receivable could change as well. Circumstances that could affect this estimate include, but are not limited to, customer credit issues, customer deposits, and general economic conditions. Customers' accounts are written off once they are deemed to be uncollectible. For all periods presented, uncollectible accounts averaged less than 1% of revenues for each Registrant.
Credit risk exposure at Nicor Gas is mitigated by a bad debt rider approved by the Illinois Commission. The bad debt rider provides for the recovery from (or refund to) customers of the difference between Nicor Gas' actual bad debt experience on an annual basis and the benchmark bad debt expense used to establish its base rates for the respective year.
Concentration of Credit Risk
Southern Company Gas' wholesale gas services business has a concentration of credit risk for services it provides to its counterparties. This credit risk is generally concentrated in 20 of its counterparties and is measured by 30-day receivable exposure plus forward exposure. Counterparty credit risk is evaluated using a S&P equivalent credit rating, which is determined by a process of converting the lower of the S&P or Moody's rating to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being equivalent to D/Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of its financial ratios. As of December 31, 2019, the top 20 counterparties represented 59%, or $218 million, of the total counterparty exposure and had a weighted average S&P equivalent rating of A-.
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 16 Marketers in Georgia (including SouthStar). The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The functions of the retail sale of gas include the purchase and sale of natural gas, customer service, billings, and collections. The provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain credit security support in an amount equal to a minimum of 2 times a Marketer's highest month's estimated bill from Atlanta Gas Light.
Financial Instruments
The Company usestraditional electric operating companies and Southern Power use derivative financial instruments to limit exposure to fluctuations in interest rates, the prices of certain fuel purchases, electricity purchases and sales, and occasionally foreign currency exchange rates. Southern Company Gas uses derivative financial instruments to limit exposure to fluctuations in natural gas prices, weather, interest rates, and commodity prices. All derivative financial instruments are recognized as either assets or liabilities on the consolidated balance sheets (included in "Other" or shown separately as "Risk Management Activities") and are measured at

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

fair value. See Note 813 for additional information regarding fair value. Substantially all of the Company'straditional electric operating companies' and Southern Power's bulk energy purchases and sales contracts that meet the definition of a derivative are excluded from fair value accounting requirements because they qualify for the "normal" scope exception, and are accounted for under the accrual method. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the traditional electric operating companies' and the natural gas distribution utilities' fuel-hedging programs result in the deferral of related gains and losses in AOCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. AnyFor 2017, ineffectiveness arising from cash flow hedges iswas recognized currently in net income. Upon the adoption of ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities (ASU 2017-12) in 2018, ineffectiveness is no longer separately measured and recorded in earnings. Other derivative contracts that qualify as fair value hedges are marked to market through current period income and are recorded on a net basis in the financial statement line item where they will eventually settle.statements of income. Cash flows from derivatives are classified on the statementstatements of cash flows in the same category as the hedged item. See Note 914 for additional information regarding derivatives.
Beginning in 2016, the Company offsets theThe Registrants offset fair value amounts recognized for multiple derivative instruments executed with the same counterparty under a netting arrangement. Additionally, the Companyarrangements. The Registrants had no0 outstanding collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2016.2019.
The Company isRegistrants are exposed to potential losses related to financial instruments in the event of counterparties' nonperformance. The Company hasRegistrants have established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company'stheir exposure to counterparty credit risk.
Southern Company Gas
Southern Company Gas enters into weather derivative contracts as economic hedges of natural gas revenues in the event of warmer-than-normal weather in the Heating Season. Exchange-traded options are carried at fair value, with changes reflected in natural gas revenues. Non-exchange-traded options are accounted for using the intrinsic value method. Changes in the intrinsic value for non-exchange-traded contracts are also reflected in natural gas revenues in the statements of income.
Wholesale gas services purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than the market price that can be received in the future, resulting in positive net natural gas revenues. NYMEX futures and OTC contracts are used to sell natural gas at that future price to substantially protect the natural gas revenues that will ultimately be realized when the stored natural gas is sold. Southern Company Gas enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. NYMEX futures and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between delivery points occurs. These contracts generally meet the definition of derivatives and are carried at fair value on the balance sheets, with changes in fair value recorded in natural gas revenues on the statements of income in the period of change. These contracts are not designated as hedges for accounting purposes.
The purchase, transportation, storage, and sale of natural gas are accounted for on a weighted average cost or accrual basis, as appropriate, rather than on the fair value basis utilized for the derivatives used to mitigate the natural gas price risk associated with the storage and transportation portfolio. Monthly demand charges are incurred for the contracted storage and transportation capacity and payments associated with asset management agreements, and these demand charges and payments are recognized on the statements of income in the period they are incurred. This difference in accounting methods can result in volatility in reported earnings, even though the economic margin is substantially unchanged from the dates the transactions were consummated.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income attributable to the Registrant, changes in the fair value of qualifying cash flow hedges, and reclassifications offor amounts included in net income. Comprehensive income also consists of certain changes in pension and other postretirement benefit plans for Southern Company, Southern Power, and Southern Company Gas.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

AOCI (loss) balances, net of tax effects, for Southern Company, Southern Power, and Southern Company Gas were as follows:
 
Qualifying
Hedges
 
Pension and Other
Postretirement
Benefit Plans
 
Accumulated Other
Comprehensive
Income (Loss)
 (in millions)
Southern Company     
Balance at December 31, 2018$(121) $(82) $(203)
Current period change(58) (60) (118)
Balance at December 31, 2019$(179) $(142) $(321)
      
Southern Power     
Balance at December 31, 2018$36
 $(20) $16
Current period change(25) (17) (42)
Balance at December 31, 2019$11
 $(37) $(26)
      
Southern Company Gas     
Balance at December 31, 2018$(3) $29
 $26
Current period change(3) (16) (19)
Balance at December 31, 2019$(6) $13
 $7

Variable Interest Entities
The Registrants may hold ownership interests in a number of business ventures with varying ownership structures. Partnership interests and other variable interests are evaluated to determine if each entity is a VIE. The primary beneficiary of a variable interest entity (VIE)VIE is required to consolidate the VIE when it has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb losses or the right to receive benefits from the VIE that could potentially be significant to the VIE. See Note 7 for additional information regarding VIEs.
Alabama Power has established a wholly-owned trust to issue preferred securities. See Note 8 under "Long-term Debt" for additional information. However, Alabama Power is not considered the primary beneficiary of the trust. Therefore, the investment in the trust is reflected as other investments, and the related loan from the trust is reflected as long-term debt in Alabama Power's balance sheets.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2. REGULATORY MATTERS
Southern Company
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the consolidated balance sheets of Southern Company at December 31, 2019 and 2018 relate to:
 2019 2018 Note
 (in millions)  
Retiree benefit plans$4,423
 $3,658
 (a,o)
Asset retirement obligations-asset4,381
 2,933
 (b,o)
Remaining net book value of retired assets1,275
 211
 (c)
Deferred income tax charges803
 799
 (b,n)
Property damage reserves-asset410
 416
 (d)
Environmental remediation-asset349
 366
 (e,o)
Loss on reacquired debt323
 346
 (f)
Under recovered regulatory clause revenues254
 407
 (g)
Vacation pay186
 182
 (h,o)
Long-term debt fair value adjustment107
 121
 (i)
Other regulatory assets492
 581
 (j)
Deferred income tax credits(6,301) (6,455) (b,n)
Other cost of removal obligations(2,084) (2,297) (b)
Customer refunds(285) (293) (k)
Over recovered regulatory clause revenues(205) (47) (g)
Property damage reserves-liability(204) (76) (l)
Other regulatory liabilities(86) (132) (m)
Total regulatory assets (liabilities), net$3,838
 $720
  
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) are approved by the respective PSC or regulatory agency and are as follows:
(a)Recovered and amortized over the average remaining service period, which may range up to 15 years. See Note 11 for additional information.
(b)AROs and other cost of removal obligations are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 80 years. Asset retirement and removal liabilities will be settled and trued up following completion of the related activities. Included in the deferred income tax assets is $23 million for the retiree Medicare drug subsidy, which is being recovered and amortized through 2027.
(c)Amortized over periods not exceeding 18 years.
(d)
Effective January 1, 2020, Georgia Power is recovering approximately $213 million annually for storm damage. See "Georgia PowerRate Plans2019 ARP" and " – Storm Damage Recovery" herein for additional information.
(e)Recovered through environmental cost recovery mechanisms when the remediation work is performed. See Note 3 for additional information.
(f)Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue. At December 31, 2019, the remaining amortization periods do not exceed 34 years.
(g)Recorded and recovered or amortized over periods generally not exceeding six years.
(h)Recorded as earned by employees and recovered as paid, generally within one year.
(i)Recovered over the remaining life of the original debt issuances at acquisition, which range up to 19 years as of December 31, 2019.
(j)Comprised of numerous immaterial components including nuclear outage costs, fuel-hedging losses, cancelled construction projects, property tax, and other miscellaneous assets. These costs are amortized over remaining periods generally not exceeding eight years as of December 31, 2019.
(k)
At December 31, 2019 and 2018, primarily includes approximately $53 million and $109 million, respectively, at Alabama Power and $110 million and $100 million, respectively, at Georgia Power as a result of each company exceeding its allowed retail return range, as well as approximately $105 million and $55 million, respectively, pursuant to the Georgia Power Tax Reform Settlement Agreement. See "Alabama PowerRate RSE" and "Georgia PowerRate Plans" herein for additional information.
(l)
Amortized as related expenses are incurred. See "Alabama PowerRate NDR" and "Mississippi PowerSystem Restoration Rider" herein for additional information.
(m)Comprised of numerous components including building leases, fuel-hedging gains, and other liabilities that are recovered over remaining periods not exceeding 20 years.
(n)
As a result of the Tax Reform Legislation, these accounts include certain deferred income tax assets and liabilities not subject to normalization, including $778 million of liabilities being amortized over periods not exceeding six years as of December 31, 2019. See "Georgia Power," "Mississippi Power," and "Southern Company Gas" herein and Note 10 for additional information.
(o)Not earning a return as offset in rate base by a corresponding asset or liability.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Gulf Power
On January 1, 2019, Southern Company completed its sale of Gulf Power to NextEra Energy. See Note 15 under "Southern Company" for additional information.
In accordance with a Florida PSC-approved settlement agreement, Gulf Power's rates effective for the first billing cycle in July 2017 increased by approximately $54 million annually (2017 Gulf Power Rate Case Settlement Agreement), including a $62 million increase in base revenues, less an $8 million purchased power capacity cost recovery clause credit. The 2017 Gulf Power Rate Case Settlement Agreement also resulted in a $32.5 million write-down of Gulf Power's ownership of Plant Scherer Unit 3, which was recorded in the first quarter 2017.
As a continuation of the 2017 Gulf Power Rate Case Settlement Agreement, in March 2018, the Florida PSC approved a stipulation and settlement agreement addressing Gulf Power's retail revenue requirement effects of the Tax Reform Legislation (Gulf Power Tax Reform Settlement Agreement). Beginning on April 1, 2018, the Gulf Power Tax Reform Settlement Agreement resulted in annual reductions of approximately $18 million to Gulf Power's base rates and approximately $16 million to Gulf Power's environmental cost recovery rates and a one-time refund of approximately $69 million for the retail portion of unprotected (not subject to normalization) deferred tax liabilities, which was credited to customers through Gulf Power's fuel cost recovery rates over the remainder of 2018.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Alabama Power
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Alabama Power at December 31, 2019 and 2018 relate to:
 2019 2018 Note
 (in millions)  
Retiree benefit plans$1,131
 $947
 (a,o)
Asset retirement obligations1,043
 147
 (b)
Deferred income tax charges245
 241
 (b,c,d)
(Over) under recovered regulatory clause revenues(72) 176
 (e)
Regulatory clauses142
 142
 (f)
Vacation pay72
 71
 (g,o)
Loss on reacquired debt52
 56
 (h)
Nuclear outage78
 49
 (i)
Remaining net book value of retired assets649
 43
 (j)
Other regulatory assets67
 57
 (k,l)
Deferred income tax credits(1,960) (2,027) (b,d)
Other cost of removal obligations(412) (497) (b)
Customer refunds(56) (142) (m)
Natural disaster reserve(150) (20) (n)
Other regulatory liabilities(19) (12) (l)
Total regulatory assets (liabilities), net$810
 $(769)  
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) have been accepted or approved by the Alabama PSC and are as follows:
(a)Recovered and amortized over the average remaining service period which may range up to 14 years. See Note 11 for additional information.
(b)Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax credits are amortized over the related property lives, which may range up to 53 years. Asset retirement and other cost of removal assets and liabilities will be settled and trued up following completion of the related activities.
(c)Included in the deferred income tax charges are $9 million for 2019 and $10 million for 2018 for the retiree Medicare drug subsidy, which is being recovered and amortized through 2027.
(d)As a result of the Tax Reform Legislation, these accounts include certain deferred income tax assets and liabilities not subject to normalization. The recovery and amortization of these amounts will occur ratably over the related property lives, which may range up to 53 years. See Note 10 for additional information.
(e)
Recorded monthly and expected to be recovered or returned within three years. See "Rate CNP PPA," "Rate CNP Compliance," and" Rate ECR" herein for additional information.
(f)In accordance with an accounting order issued in 2017 by the Alabama PSC, these regulatory assets will be amortized concurrently with the effective date of Alabama Power's next depreciation study, which is expected to occur no later than 2022.
(g)Recorded as earned by employees and recovered as paid, generally within one year. This includes both vacation and banked holiday pay.
(h)Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue. At December 31, 2019, the remaining amortization periods do not exceed 30 years.
(i)Nuclear outage costs are deferred to a regulatory asset when incurred and amortized over a subsequent 18-month period.
(j)Recorded and amortized over remaining periods not exceeding 18 years.
(k)Comprised of components including generation site selection/evaluation costs, which are capitalized upon initiation of related construction projects, if applicable, and PPA capacity costs, which are to be recovered over the next 12 months.
(l)Fuel-hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three and a half years. Upon final settlement, actual costs incurred are recovered through the energy cost recovery clause.
(m)
Includes $53 million for 2019 and $109 million for 2018 due to the retail return exceeding the allowed range. The December 31, 2018 balance also includes a $33 million excess deferred tax liability used to increase the Rate NDR balance in 2019. See "Rate RSE," "Rate NDR," and "Tax Reform Accounting Order" herein for additional information.
(n)Amortized as expenses are incurred. See "Rate NDR" herein for additional information.
(o)Not earning a return as offset in rate base by a corresponding asset or liability.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Petition for Certificate of Convenience and Necessity
On September 6, 2019, Alabama Power filed a petition for a CCN with the Alabama PSC for authorization to procure additional generating capacity through the turnkey construction of a new combined cycle facility and long-term contracts for the purchase of power from others, both as more fully described below, as well as the acquisition of an existing combined cycle facility in Autauga County, Alabama (Autauga Combined Cycle Acquisition). In addition, Alabama Power will pursue approximately 200 MWs of certain demand side management and distributed energy resource programs. This filing was predicated on the results of Alabama Power's 2019 IRP provided to the Alabama PSC, which identified an approximately 2,400-MW resource need for Alabama Power, driven by the need for additional winter reserve capacity. See Note 15 under "Alabama Power" for additional information regarding the Autauga Combined Cycle Acquisition.
The procurement of these resources is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC. The completion of the Autauga Combined Cycle Acquisition is also subject to approval by the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
On May 8, 2019, Alabama Power entered into an Agreement for Engineering, Procurement, and Construction with Mitsubishi Hitachi Power Systems Americas, Inc. and Black & Veatch Construction, Inc. to construct an approximately 720-MW combined cycle facility at Plant Barry (Plant Barry Unit 8), which is expected to be placed in service by the end of 2023.
The capital investment associated with the construction of Plant Barry Unit 8 and the Autauga Combined Cycle Acquisition is currently estimated to total approximately $1.1 billion.
Alabama Power entered into additional long-term PPAs totaling approximately 640 MWs of generating capacity consisting of approximately 240 MWs of combined cycle generation expected to begin later in 2020 and approximately 400 MWs of solar generation coupled with battery energy storage systems (solar/battery systems) expected to begin in 2022 through 2024. The terms of the agreements for the solar/battery systems permit Alabama Power to use the energy and retire the associated renewable energy credits (REC) in service of customers or to sell RECs, separately or bundled with energy.
Upon certification, Alabama Power expects to recover costs associated with Plant Barry Unit 8 pursuant to its Rate CNP New Plant. Additionally, Alabama Power expects to recover costs associated with the Autauga Combined Cycle Acquisition through the inclusion in Rate RSE of revenues from the existing power sales agreement and, on expiration of that agreement, pursuant to Rate CNP New Plant. The recovery of costs associated with laws, regulations, and other such mandates directed at the utility industry are expected to be recovered through Rate CNP Compliance. Alabama Power expects to recover the capacity-related costs associated with the PPAs through its Rate CNP PPA. In addition, fuel and energy-related costs are expected to be recovered through Rate ECR. Any remaining costs associated with the Autauga Combined Cycle Acquisition and Plant Barry Unit 8 will be incorporated through the annual filing of Rate RSE.
The ultimate outcome of these matters cannot be determined at this time.
Construction Work in Progress Accounting Order
On October 1, 2019, the Alabama PSC acknowledged that Alabama Power would begin certain limited preparatory activities associated with Plant Barry Unit 8 construction to meet the target in-service date by authorizing Alabama Power to record the related costs as CWIP prior to the issuance of an order on the CCN petition. Should a CCN not be granted and Alabama Power does not proceed with the related construction of Plant Barry Unit 8, Alabama Power may transfer those costs and any costs that directly result from the non-issuance of the CCN to a regulatory asset which would be amortized over a five-year period. If the balance of incurred costs reaches 5% of the estimated in-service cost of the total project prior to issuance of an order on the CCN petition, Alabama Power will confer with the Alabama PSC regarding the appropriateness of additional authorization. The Sierra Club subsequently filed a petition for reconsideration of the accounting order. The Alabama PSC voted to deny the petition for reconsideration on January 7, 2020.
Rate RSE
The Alabama PSC has adopted Rate RSE that provides for periodic annual adjustments based upon Alabama Power's projected weighted common equity return (WCER) compared to an allowable range. Rate RSE adjustments are based on forward-looking information for the applicable upcoming calendar year. Rate RSE adjustments for any two-year period, when averaged together, cannot exceed 4.0% and any annual adjustment is limited to 5.0%. When the projected WCER is under the allowed range, there is an adjusting point of 5.98% and eligibility for a performance-based adder of seven basis points, or 0.07%, to the WCER adjusting point if Alabama Power (i) has an "A" credit rating equivalent with at least one of the recognized rating agencies or (ii) is in the top one-third of a designated customer value benchmark survey. If Alabama Power's actual retail return is above the allowed WCER range, the excess will be refunded to customers unless otherwise directed by the Alabama PSC; however, there is no

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

provision for additional customer billings should the actual retail return fall below the WCER range. Prior to January 2019, retail rates remained unchanged when the WCER range was between 5.75% and 6.21%.
Effective in January 2017, Rate RSE increased 4.48%, or $245 million annually. At December 31, 2017, Alabama Power's actual retail return was within the allowed WCER range. Retail rates under Rate RSE were unchanged for 2018.
In conjunction with Rate RSE, Alabama Power has an established retail tariff that provides for an adjustment to customer billings to recognize the impact of a change in the statutory income tax rate. In accordance with this tariff, Alabama Power returned $267 million to retail customers through bill credits during 2018 as a result of the change in the federal income tax rate under the Tax Reform Legislation.
In May 2018, the Alabama PSC approved modifications to Rate RSE and other commitments designed to position Alabama Power to address the growing pressure on its credit quality resulting from the Tax Reform Legislation, without increasing retail rates under Rate RSE in the near term. Alabama Power plans to reduce growth in total debt by increasing equity, with corresponding reductions in debt issuances, thereby de-leveraging its capital structure. Alabama Power's goal is to achieve an equity ratio of approximately 55% by the end of 2025. At December 31, 2019 and 2018, Alabama Power's equity ratio was approximately 50% and 47%, respectively.
The approved modifications to Rate RSE began for billings in January 2019. The modifications include reducing the top of the allowed WCER range from 6.21% to 6.15% and modifications to the refund mechanism applicable to prior year actual results. The modifications to the refund mechanism allow Alabama Power to retain a portion of the revenue that causes the actual WCER for a given year to exceed the allowed range.
Generally, during a year without a Rate RSE upward adjustment, if Alabama Power's actual WCER is between 6.15% and 7.65%, customers will receive 25% of the amount between 6.15% and 6.65%, 40% of the amount between 6.65% and 7.15%, and 75% of the amount between 7.15% and 7.65%. Customers will receive all amounts in excess of an actual WCER of 7.65%. During a year with a Rate RSE upward adjustment, if Alabama Power's actual WCER exceeds 6.15%, customers receive 50% of the amount between 6.15% and 6.90% and all amounts in excess of an actual WCER of 6.90%.
In conjunction with these modifications to Rate RSE, in May 2018, Alabama Power consented to a moratorium on any upward adjustments under Rate RSE for 2019 and 2020 and to return $50 million to customers through bill credits in 2019.
At December 31, 2018, Alabama Power's retail return exceeded the allowed WCER range, which resulted in Alabama Power establishing a regulatory liability of $109 million for Rate RSE refunds. In accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power applied $78 million to reduce the Rate ECR under recovered balance and the remaining $31 million was refunded to customers through bill credits starting in July 2019.
On November 27, 2019, Alabama Power made its required annual Rate RSE submission to the Alabama PSC of projected data for calendar year 2020. Projected earnings were within the specified range; therefore, retail rates under Rate RSE remain unchanged for 2020.
During 2019, Alabama Power provided to the Alabama PSC and the Alabama Office of the Attorney General information related to the operation and utilization of Rate RSE, in accordance with the rules governing the operation of Rate RSE. The ultimate outcome of this matter cannot be determined at this time.
At December 31, 2019, Alabama Power's WCER exceeded 6.15%, resulting in Alabama Power establishing a current regulatory liability of $53 million for Rate RSE refunds, which will be refunded to customers through bill credits in April 2020.
Rate CNP New Plant
Rate CNP New Plant allows for recovery of Alabama Power's retail costs associated with newly developed or acquired certificated generating facilities placed into retail service. No adjustments to Rate CNP New Plant occurred during the period 2017 through 2019. See "Petition for Certificate of Convenience and Necessity" herein for additional information.
Rate CNP PPA
Rate CNP PPA allows for the recovery of Alabama Power's retail costs associated with certificated PPAs. No adjustments to Rate CNP PPA occurred during the period 2017 through 2019 and no adjustment is expected for 2020. At December 31, 2019 and 2018, Alabama Power had an under recovered Rate CNP PPA balance of $40 million and $25 million, respectively, which is included in other regulatory assets, deferred on Southern Company's balance sheets and deferred under recovered regulatory clause revenues on Alabama Power's balance sheets.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Rate CNP Compliance
Rate CNP Compliance allows for the recovery of Alabama Power's retail costs associated with laws, regulations, and other such mandates directed at the utility industry involving the environment, security, reliability, safety, sustainability, or similar considerations impacting Alabama Power's facilities or operations. Rate CNP Compliance is based on forward-looking information and provides for the recovery of these costs pursuant to factors that are calculated and submitted to the Alabama PSC by December 1 with rates effective for the following calendar year. Compliance costs to be recovered include operations and maintenance expenses, depreciation, and a return on certain invested capital. Revenues for Rate CNP Compliance, as recorded on the financial statements, are adjusted for differences in actual recoverable costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will have no significant effect on Southern Company's or Alabama Power's revenues or net income, but will affect annual cash flow. Changes in Rate CNP Compliance-related operations and maintenance expenses and depreciation generally will have no effect on net income.
In November 2018, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected under recovered retail revenue requirement for governmental mandates of approximately $205 million, which was recovered in the billing months of January 2019 through December 2019.
On November 27, 2019, Alabama Power submitted calculations associated with its cost of complying with governmental mandates, as provided under Rate CNP Compliance. The filing reflected a projected over recovered retail revenue requirement for governmental mandates, which resulted in a rate decrease of approximately $68 million that became effective for the billing month of January 2020.
At December 31, 2019, Alabama Power had an over recovered Rate CNP Compliance balance of $62 million, of which $55 million is included in other regulatory liabilities, current and $7 million is included in other regulatory liabilities, deferred on the balance sheet, compared to an under recovered balance of $42 million at December 31, 2018 included in customer accounts receivable on the balance sheet.
Rate ECR
Rate ECR recovers Alabama Power's retail energy costs based on an estimate of future energy costs and the current over or under recovered balance. Revenues recognized under Rate ECR and recorded on the financial statements are adjusted for the difference in actual recoverable fuel costs and amounts billed in current regulated rates. The difference in the recoverable fuel costs and amounts billed gives rise to the over or under recovered amounts recorded as regulatory assets or liabilities. Alabama Power, along with the Alabama PSC, continually monitors the over or under recovered cost balance to determine whether an adjustment to billing rates is required. Changes in the Rate ECR factor have no significant effect on Southern Company's or Alabama Power's net income but will impact operating cash flows. The Alabama PSC may approve billing rates under Rate ECR of up to 5.910 cents per KWH.
In May 2018, the Alabama PSC approved an increase to Rate ECR from 2.015 cents per KWH to 2.353 cents per KWH effective July 2018 through December 2018. In December 2018, the Alabama PSC issued a consent order to leave this rate in effect through December 31, 2019.
As discussed herein under "Rate RSE," in accordance with an Alabama PSC order issued on February 5, 2019, Alabama Power utilized $78 million of the 2018 Rate RSE refund liability to reduce the Rate ECR under recovered balance.
On December 3, 2019, the Alabama PSC approved a decrease to Rate ECR from 2.353 to 2.160 cents per KWH, equal to 1.82%, or approximately $102 million annually, effective January 1, 2020. The rate will adjust to 5.910 cents per KWH in January 2021 absent a further order from the Alabama PSC.
At December 31, 2019, Alabama Power's over recovered fuel costs totaled $49 million, of which $32 million is included in other regulatory liabilities, current and $17 million is included in other regulatory liabilities, deferred on Southern Company's and Alabama Power's balance sheets. At December 31, 2018, Alabama Power's under recovered fuel costs totaled $109 million, of which $18 million is included in customer accounts receivable and $91 million is included in deferred under recovered regulatory clause revenues on Southern Company's and Alabama Power's balance sheets. These classifications are based on estimates, which include such factors as weather, generation availability, energy demand, and the price of energy. A change in any of these factors could have a material impact on the timing of any recovery or return of fuel costs.
Tax Reform Accounting Order
In May 2018, the Alabama PSC approved an accounting order that authorized Alabama Power to defer the benefits of federal excess deferred income taxes associated with the Tax Reform Legislation for the year ended December 31, 2018 as a regulatory

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Southern Company and Subsidiary Companies 2019 Annual Report

liability and to use up to $30 million of such deferrals to offset under recovered amounts under Rate ECR. The final excess deferred tax liability for the year ended December 31, 2018 totaled approximately $69 million, of which $30 million was used to offset the Rate ECR under recovered balance. On December 3, 2019, the Alabama PSC issued an order authorizing Alabama Power to apply the remaining deferred balance of approximately $39 million to increase the balance in the NDR. See "Rate NDR" herein and Note 10 under "Current and Deferred Income Taxes" for additional information.
Software Accounting Order
On February 5, 2019, the Alabama PSC approved an accounting order that authorizes Alabama Power to establish a regulatory asset for operations and maintenance costs associated with software implementation projects. The regulatory asset will be amortized ratably over the life of the related software.
Rate NDR
Based on an order from the Alabama PSC, Alabama Power maintains a reserve for operations and maintenance expenses to cover the cost of damages from major storms to its transmission and distribution facilities. The order approves a separate monthly Rate NDR charge to customers consisting of two components. The first component is intended to establish and maintain a reserve balance for future storms and is an on-going part of customer billing. When the reserve balance falls below $50 million, a reserve establishment charge will be activated (and the on-going reserve maintenance charge concurrently suspended) until the reserve balance reaches $75 million.
The second component of the Rate NDR charge is intended to allow recovery of any existing deferred storm-related operations and maintenance costs and any future reserve deficits over a 24-month period. The Alabama PSC order gives Alabama Power authority to record a deficit balance in the NDR when costs of storm damage exceed any established reserve balance. Absent further Alabama PSC approval, the maximum total Rate NDR charge consisting of both components is $10 per month per non-residential customer account and $5 per month per residential customer account. Alabama Power has the authority, based on an order from the Alabama PSC, to accrue certain additional amounts as circumstances warrant. The order allows for reliability-related expenditures to be charged against the additional accruals when the NDR balance exceeds $75 million. Alabama Power may designate a portion of the NDR to reliability-related expenditures as a part of an annual budget process for the following year or during the current year for identified unbudgeted reliability-related expenditures that are incurred. Accruals that have not been designated can be used to offset storm charges. Additional accruals to the NDR enhance Alabama Power's ability to mitigate the financial effects of future natural disasters, promote system reliability, and offset costs retail customers would otherwise bear. There were no such accruals in 2017 and 2018.
As discussed herein under "Tax Reform Accounting Order," in accordance with an Alabama PSC order issued on December 3, 2019, Alabama Power applied the remaining excess deferred income tax regulatory liability balance of approximately $39 million to increase the balance in the NDR. Alabama Power also accrued an additional $84 million to the NDR in December 2019 resulting in an accumulated balance of $150 million at December 31, 2019. Of this amount, Alabama Power designated $37 million to be applied to budgeted reliability-related expenditures for 2020, which is included in other regulatory liabilities, current. The remaining NDR balance of $113 million is included in other regulatory liabilities, deferred on the balance sheet.
In December 2017, the reserve maintenance charge was suspended and the reserve establishment charge was activated and collected approximately $16 million annually through 2019. Effective with the March 2020 billings, the reserve establishment charge will be suspended and the reserve maintenance charge will be activated as a result of the NDR balance exceeding $75 million. Alabama Power expects to collect approximately $5 million in 2020 and $3 million annually thereafter unless the NDR balance falls below $50 million.
As revenue from the Rate NDR charge is recognized, an equal amount of operations and maintenance expenses related to the NDR will also be recognized. As a result, the Rate NDR charge will not have an effect on net income but will impact operating cash flows.
Environmental Accounting Order
Based on an order from the Alabama PSC (Environmental Accounting Order), Alabama Power is allowed to establish a regulatory asset to record the unrecovered investment costs, including the unrecovered plant asset balance and the unrecovered costs associated with site removal and closure associated with future unit retirements caused by environmental regulations. The regulatory asset is being amortized and recovered over the affected unit's remaining useful life, as established prior to the decision regarding early retirement through Rate CNP Compliance.
On April 15, 2019, Alabama Power retired Plant Gorgas Units 8, 9, and 10 and reclassified approximately $654 million of the unrecovered asset balances to regulatory assets, which are being recovered over the units' remaining useful lives, the latest being

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Southern Company and Subsidiary Companies 2019 Annual Report

through 2037, as established prior to the decision to retire. At December 31, 2019, the related regulatory assets totaled $649 million, of which $63 million is included in other regulatory assets, current and $586 million is included in other regulatory assets, deferred on the balance sheet. Additionally, approximately $700 million of net capitalized asset retirement costs were reclassified to a regulatory asset in accordance with accounting guidance provided by the Alabama PSC. The asset retirement costs are being recovered through 2055.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Georgia Power at December 31, 2019 and 2018 relate to:
 2019 2018 Note
 (in millions)  
Retiree benefit plans$1,516
 $1,295
 (a, m)
Asset retirement obligations3,119
 2,644
 (b, m)
Deferred income tax charges523
 522
 (b, c, m)
Storm damage reserves410
 416
 (d)
Remaining net book value of retired assets596
 127
 (e)
Loss on reacquired debt262
 277
 (f, m)
Vacation pay93
 91
 (g, m)
Other cost of removal obligations156
 68
 (b)
Environmental remediation52
 55
 (h)
Fuel-hedging (realized and unrealized) losses53
 15
 (i, m)
Other regulatory assets50
 120
 (j)
Deferred income tax credits(3,078) (3,080) (b, c)
Customer refunds(229) (165) (k)
Other regulatory liabilities(16) (7) (l, m)
Total regulatory assets (liabilities), net$3,507
 $2,378
  
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) are approved by the Georgia PSC and are as follows:
(a)Recovered and amortized over the average remaining service period which may range up to 13 years. See Note 11 for additional information.
(b)
Effective January 1, 2020, Georgia Power is recovering CCR AROs through its Environmental Compliance Cost Recovery (ECCR) tariff and approximately $5 million annually for other AROs through its traditional base tariffs. See "Rate Plans2019 ARP" and "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs. Other cost of removal obligations, non-CCR AROs, and deferred income tax assets are recovered and deferred income tax liabilities are amortized over the related property lives, which may range up to 60 years. Included in the deferred income tax assets is $13 million for the retiree Medicare drug subsidy, which is being recovered and amortized through 2022. See Note 6 for additional information on AROs.
(c)
As a result of the Tax Reform Legislation, these balances include $145 million of deferred income tax assets related to CWIP for Plant Vogtle Units 3 and 4 and approximately $660 million of deferred income tax liabilities, neither of which are subject to normalization. The recovery of deferred income tax assets related to CWIP for Plant Vogtle Units 3 and 4 is expected to be determined in a future regulatory proceeding. Effective January 1, 2020, the deferred income tax liabilities are being amortized through 2022. See "Rate Plans" herein and Note 10 for additional information.
(d)
Effective January 1, 2020, Georgia Power is recovering $213 million annually for storm damage. See "Rate Plans2019 ARP" and "Storm Damage Recovery" herein and Note 1 under "Storm Damage Reserves" for additional information.
(e)
The net book values of Plant Hammond Units 1 through 4 ($488 million at December 31, 2019) and Plant Branch Units 1 through 4 ($69 million and $87 million at December 31, 2019 and 2018, respectively) are being amortized over the units' remaining useful lives, which vary between 2020 and 2035. The net book values of Plant McIntosh Unit 1 ($30 million at December 31, 2019) and Plant Mitchell Unit 3 ($8 million and $9 million at December 31, 2019 and 2018, respectively) are being amortized through 2022. The balance at December 31, 2018 also includes $31 million related to obsolete inventories of certain retired units, which was fully amortized under the 2019 ARP. See "Rate Plans2019 ARP" and "Integrated Resource Plan" herein for additional information.
(f)Recovered over either the remaining life of the original issue or, if refinanced, over the remaining life of the new issue. At December 31, 2019, the amortization periods do not exceed 33 years.
(g)Recorded as earned by employees and recovered as paid, generally within one year.
(h)
Effective January 1, 2020, Georgia Power is recovering $12 million annually for environmental remediation. See Note 3 under "Environmental Remediation" for additional information.
(i)Recovered through Georgia Power's fuel cost recovery mechanism upon final settlement, within four years.
(j)Comprised of several components including deferred nuclear outage costs and cancelled construction projects. Nuclear outage costs are recorded as incurred and recovered over the outage cycles of each nuclear unit, which do not exceed 24 months. Approximately $22 million of costs associated with construction of environmental controls that will not be completed as a result of unit retirements are being amortized through 2022.
(k)
At December 31, 2019 and 2018, includes approximately $110 million and $100 million, respectively, as a result of the retail ROE exceeding the allowed retail ROE range and approximately $105 million and $55 million, respectively, related to the Georgia Power Tax Reform Settlement Agreement. See "Rate Plans" herein for additional information.
(l)Comprised of Demand-Side Management (DSM) tariffs over recovery, building lease, and fuel-hedging gains. DSM tariffs over recovery of $10 million at December 31, 2019 is being amortized through 2022. The building lease is being amortized through 2030. Fuel-hedging gains are refunded through Georgia Power's fuel cost recovery mechanism upon final settlement, within four years.
(m)Generally not earning a return as they are excluded from rate base or are offset in rate base by a corresponding asset or liability.

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Southern Company and Subsidiary Companies 2019 Annual Report

Rate Plans
2019 ARP
On December 17, 2019, the Georgia PSC voted to approve the 2019 ARP, under which Georgia Power increased its rates on January 1, 2020 and will increase rates annually for 2021 and 2022 as detailed below based on compliance filings to be made at least 90 days prior to the effective date. Georgia Power will recover estimated increases through its existing tariffs as follows:
Tariff202020212022
 (in millions)
Traditional base$
$120
$192
ECCR(a)
318
55
184
DSM12
1
1
Municipal Franchise Fee12
4
9
Total(b)
$342
$181
$386
(a)Effective January 1, 2020, CCR AROs will be recovered through the ECCR tariff. See "Integrated Resource Plan" herein for additional information on recovery of compliance costs for CCR AROs.
(b)Totals may not add due to rounding.
Further, under the 2019 ARP, Georgia Power's retail ROE is set at 10.50%, and earnings will be evaluated against a retail ROE range of 9.50% to 12.00%. The Georgia PSC also approved an increase in the retail equity ratio to 56% from 55%. Any retail earnings above 12.00% will be shared, with 40% being applied to reduce regulatory assets, 40% directly refunded to customers, and the remaining 20% retained by Georgia Power. There will be no recovery of any earnings shortfall below 9.50% on an actual basis. However, if at any time during the term of the 2019 ARP, Georgia Power projects that its retail earnings will be below 9.50% for any calendar year, it could petition the Georgia PSC for implementation of the Interim Cost Recovery (ICR) tariff to adjust Georgia Power's retail rates to achieve a 9.50% ROE. The Georgia PSC would have 90 days to rule on Georgia Power's request. The ICR tariff would expire at the earlier of January 1, 2023 or the end of the calendar year in which the ICR tariff becomes effective. In lieu of requesting implementation of an ICR tariff, or if the Georgia PSC chooses not to implement the ICR tariff, Georgia Power may file a full rate case.
Additionally, under the 2019 ARP and pursuant to the sharing mechanism approved in the 2013 ARP whereby two-thirds of any earnings above the top of the allowed ROE range are shared with Georgia Power's customers, (i) Georgia Power used 50% (approximately $50 million) of the customer share of earnings above the band in 2018 to reduce regulatory assets and 50% (approximately $50 million) will be refunded to customers in 2020 and (ii) Georgia Power will forgo its share of 2019 earnings in excess of the earnings band so that 50% (approximately $60 million) of all earnings over the 2019 band will be refunded to customers and 50% (approximately $60 million) were used to reduce regulatory assets.
Except as provided above, Georgia Power will not file for a general base rate increase while the 2019 ARP is in effect. Georgia Power is required to file a general base rate case by July 1, 2022, in response to which the Georgia PSC would be expected to determine whether the 2019 ARP should be continued, modified, or discontinued.
2013 ARP
Pursuant to the terms and conditions of a settlement agreement related to Southern Company's acquisition of Southern Company Gas approved by the Georgia PSC in 2016, the 2013 ARP continued in effect until December 31, 2019. Furthermore, through December 31, 2019, Georgia Power retained its merger savings, net of transition costs, as defined in the settlement agreement; through December 31, 2022, such net merger savings will be shared on a 60/40 basis with customers; thereafter, all merger savings will be retained by customers.
There were no changes to Georgia Power's traditional base tariffs, ECCR tariff, DSM tariffs, or Municipal Franchise Fee tariffs in 2017, 2018, or 2019.
Under the 2013 ARP, Georgia Power's retail ROE was set at 10.95% and earnings were evaluated against a retail ROE range of 10.00% to 12.00%. Two-thirds of any earnings above 12.00% were to be directly refunded to customers, with the remaining one-third retained by Georgia Power. On February 5, 2019, the Georgia PSC approved a settlement between Georgia Power and the staff of the Georgia PSC under which Georgia Power's retail ROE for 2017 was stipulated to exceed 12.00% and Georgia Power reduced certain regulatory assets by approximately $4 million in lieu of providing refunds to retail customers. In 2019 and 2018, Georgia Power's retail ROE exceeded 12.00% and, under the modified sharing mechanism pursuant to the 2019 ARP, Georgia

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Southern Company and Subsidiary Companies 2019 Annual Report

Power has reduced regulatory assets by a total of approximately $110 million and expects to refund a total of approximately $110 million to customers, subject to review and approval by the Georgia PSC. See "2019 ARP" and "Integrated Resource Plan" herein for additional information.
Tax Reform Settlement Agreement
In April 2018, the Georgia PSC approved the Georgia Power Tax Reform Settlement Agreement. To reflect the federal income tax rate reduction impact of the Tax Reform Legislation, Georgia Power issued bill credits of approximately $95 million and $130 million in 2019 and 2018, respectively, and is issuing bill credits of approximately $105 million in February 2020, for a total of $330 million. In addition, Georgia Power deferred as a regulatory liability (i) the revenue equivalent of the tax expense reduction resulting from legislation lowering the Georgia state income tax rate from 6.00% to 5.75% in 2019 and (ii) the entire benefit of federal and state excess accumulated deferred income taxes. At December 31, 2019, the related regulatory liability balance totaled $659 million, which is being amortized over a three-year period ending December 31, 2022 in accordance with the 2019 ARP.
To address some of the negative cash flow and credit quality impacts of the Tax Reform Legislation, the Georgia PSC also approved an increase in Georgia Power's retail equity ratio to the lower of (i) Georgia Power's actual common equity weight in its capital structure or (ii) 55%, until the Georgia PSC approved the 2019 ARP. Benefits from reduced federal income tax rates in excess of the amounts refunded to customers were retained by Georgia Power to cover the carrying costs of the incremental equity in 2018 and 2019.
See "2019 ARP" herein for additional information.
Integrated Resource Plan
On July 16, 2019, the Georgia PSC voted to approve Georgia Power's modified triennial IRP (Georgia Power 2019 IRP). In the Georgia Power 2019 IRP, the Georgia PSC approved the decertification and retirement of Plant Hammond Units 1 through 4 (840 MWs) and Plant McIntosh Unit 1 (142.5 MWs) effective July 29, 2019. In accordance with the 2019 ARP, the remaining net book values at December 31, 2019 of $488 million for the Plant Hammond units are being recovered over a period equal to the respective unit's remaining useful life, which varies between 2024 and 2035, and $30 million for Plant McIntosh Unit 1 is being recovered over a three-year period ending December 31, 2022. In addition, approximately $20 million of related unusable materials and supplies inventory balances and approximately $295 million of net capitalized asset retirement costs were reclassified to a regulatory asset. In accordance with the modifications to the earnings sharing mechanism approved in the 2019 ARP, Georgia Power fully amortized the regulatory assets associated with these unusable materials and supplies inventory balances as well as a regulatory asset of approximately $50 million related to costs for a future generation site in Stewart County, Georgia. See "Rate Plans – 2019 ARP" herein for additional information.
Also in the Georgia Power 2019 IRP, the Georgia PSC approved Georgia Power's proposed environmental compliance strategy associated with ash pond and certain landfill closures and post-closure care in compliance with the CCR Rule and the related state rule. In the 2019 ARP, the Georgia PSC approved recovery of the estimated under recovered balance of these compliance costs at December 31, 2019 over a three-year period ending December 31, 2022 and recovery of estimated compliance costs for 2020, 2021, and 2022 over three-year periods ending December 31, 2022, 2023, and 2024, respectively, with recovery of construction contingency beginning in the year following actual expenditure. The under recovered balance at December 31, 2019 was $175 million and the estimated compliance costs expected to be incurred in 2020, 2021, and 2022 are $265 million, $290 million, and $390 million, respectively. The ECCR tariff is expected to be revised for actual expenditures and updated estimates through future annual compliance filings. See Note 6 for additional information regarding Georgia Power's AROs.
On February 4, 2020, the Georgia PSC voted to deny a motion for reconsideration filed by the Sierra Club regarding the Georgia PSC's decision in the 2019 ARP allowing Georgia Power to recover compliance costs for CCR AROs.
Additionally, the Georgia PSC rejected a request to certify approximately 25 MWs of capacity at Plant Scherer Unit 3 for the retail jurisdiction beginning January 1, 2020 following the expiration of a wholesale PPA. Georgia Power may offer such capacity in the wholesale market or to the retail jurisdiction in a future IRP.
The Georgia PSC also approved Georgia Power to (i) issue requests for proposals (RFP) for capacity beginning in 2022 or 2023 and in 2026, 2027, or 2028; (ii) procure up to an additional 2,210 MWs of renewable resources through competitive RFPs; and (iii) invest in a portfolio of up to 80 MWs of battery energy storage technologies.
Fuel Cost Recovery
Georgia Power has established fuel cost recovery rates approved by the Georgia PSC. In 2016, the Georgia PSC approved Georgia Power's request to lower annual billings under an interim fuel rider by approximately $313 million which was in effect

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Southern Company and Subsidiary Companies 2019 Annual Report

from June 1, 2016 through December 31, 2017. Georgia Power is scheduled to file its next fuel case no later than March 16, 2020, with new rates, if any, to be effective June 1, 2020. Georgia Power continues to be allowed to adjust its fuel cost recovery rates under an interim fuel rider prior to the next fuel case if the under or over recovered fuel balance exceeds $200 million. Georgia Power's over recovered fuel balance totaled $73 million at December 31, 2019 and is included in other deferred credits and liabilities on Southern Company's and Georgia Power's balance sheets. At December 31, 2018, Georgia Power's under recovered fuel balance totaled $115 million and is included in under recovered fuel clause revenues on Southern Company's and Georgia Power's balance sheets.
Georgia Power's fuel cost recovery mechanism includes costs associated with a natural gas hedging program, as revised and approved by the Georgia PSC, allowing the use of an array of derivative instruments within a 48-month time horizon.
Fuel cost recovery revenues as recorded on the financial statements are adjusted for differences in actual recoverable fuel costs and amounts billed in current regulated rates. Accordingly, changes in the billing factor will not have a significant effect on Southern Company's or Georgia Power's revenues or net income but will affect operating cash flows.
Storm Damage Recovery
Georgia Power defers and recovers certain costs related to damages from major storms as mandated by the Georgia PSC. Beginning January 1, 2020, Georgia Power is recovering $213 million annually under the 2019 ARP. At December 31, 2019 and 2018, the balance in the regulatory asset related to storm damage was $410 million and $416 million, respectively, with $213 million and $30 million, respectively, included in other regulatory assets, current on Southern Company's balance sheets and regulatory assets – storm damage reserves on Georgia Power's balance sheets and $197 million and $386 million, respectively, included in other regulatory assets, deferred on Southern Company's and Georgia Power's balance sheets. The rate of storm damage cost recovery is expected to be adjusted in future regulatory proceedings as necessary. As a result of this regulatory treatment, costs related to storms are not expected to have a material impact on Southern Company's or Georgia Power's financial statements.
Nuclear Construction
In 2009, the Georgia PSC certified construction of Plant Vogtle Units 3 and 4. Georgia Power holds a 45.7% ownership interest in Plant Vogtle Units 3 and 4. In 2012, the NRC issued the related combined construction and operating licenses, which allowed full construction of the 2 AP1000 nuclear units (with electric generating capacity of approximately 1,100 MWs each) and related facilities to begin. Until March 2017, construction on Plant Vogtle Units 3 and 4 continued under the Vogtle 3 and 4 Agreement, which was a substantially fixed price agreement. In March 2017, the EPC Contractor filed for bankruptcy protection under Chapter 11 of the U.S. Bankruptcy Code.
In connection with the EPC Contractor's bankruptcy filing, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into several transitional arrangements to allow construction to continue. In July 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, entered into the Vogtle Services Agreement, whereby Westinghouse provides facility design and engineering services, procurement and technical support, and staff augmentation on a time and materials cost basis. The Vogtle Services Agreement provides that it will continue until the start-up and testing of Plant Vogtle Units 3 and 4 are complete and electricity is generated and sold from both units. The Vogtle Services Agreement is terminable by the Vogtle Owners upon 30 days' written notice.
In October 2017, Georgia Power, acting for itself and as agent for the other Vogtle Owners, executed the Bechtel Agreement, a cost reimbursable plus fee arrangement, whereby Bechtel is reimbursed for actual costs plus a base fee and an at-risk fee, which is subject to adjustment based on Bechtel's performance against cost and schedule targets. Each Vogtle Owner is severally (not jointly) liable for its proportionate share, based on its ownership interest, of all amounts owed to Bechtel under the Bechtel Agreement. The Vogtle Owners may terminate the Bechtel Agreement at any time for their convenience, provided that the Vogtle Owners will be required to pay amounts related to work performed prior to the termination (including the applicable portion of the base fee), certain termination-related costs, and, at certain stages of the work, the applicable portion of the at-risk fee. Bechtel may terminate the Bechtel Agreement under certain circumstances, including certain Vogtle Owner suspensions of work, certain breaches of the Bechtel Agreement by the Vogtle Owners, Vogtle Owner insolvency, and certain other events.
See Note 8 under "Long-term DebtDOE Loan Guarantee Borrowings" for information on the Amended and Restated Loan Guarantee Agreement, including applicable covenants, events of default, mandatory prepayment events, and conditions to borrowing.

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Southern Company and Subsidiary Companies 2019 Annual Report

Cost and Schedule
Georgia Power's approximate proportionate share of the remaining estimated capital cost to complete Plant Vogtle Units 3 and 4 by the expected in-service dates of November 2021 and November 2022, respectively, is as follows:

(in billions)
Base project capital cost forecast(a)(b)
$8.2
Construction contingency estimate0.2
Total project capital cost forecast(a)(b)
8.4
Net investment as of December 31, 2019(b)
(5.9)
Remaining estimate to complete(a)
$2.5
(a)Excludes financing costs expected to be capitalized through AFUDC of approximately $300 million, of which $23 million had been accrued through December 31, 2019.
(b)Net of $1.7 billion received from Toshiba under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds.
As of December 31, 2019, approximately $140 million of the $366 million construction contingency estimate established in the second quarter 2018 was allocated to the base capital cost forecast for cost risks including, among other factors, construction productivity; craft labor incentives; adding resources for supervision, field support, project management, initial test program, start-up, and operations and engineering support; subcontracts; and procurement. As and when construction contingency is spent, Georgia Power may request the Georgia PSC to evaluate those expenditures for rate recovery.
Georgia Power estimates that its financing costs for construction of Plant Vogtle Units 3 and 4 will total approximately $3.1 billion, of which $2.2 billion had been incurred through December 31, 2019.
As part of its ongoing processes, Southern Nuclear continues to evaluate cost and schedule forecasts on a regular basis to incorporate current information available, particularly in the areas of commodity installation, system turnovers, and workforce statistics.
In April 2019, Southern Nuclear established aggressive target values for monthly construction production and system turnover activities as part of a strategy to maintain and, where possible, build margin to the regulatory-approved in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. The project has faced challenges with the April 2019 aggressive strategy targets, including, but not limited to, electrical and pipefitting labor productivity and closure rates for work packages, which resulted in a backlog of activities and completion percentages below the April 2019 aggressive strategy targets. However, Southern Nuclear and Georgia Power believe that existing productivity levels and pace of activity completion are sufficient to meet the regulatory-approved in-service dates.
In February 2020, Southern Nuclear updated its cost and schedule forecast, which did not change the projected overall capital cost forecast and confirmed the expected in-service dates of November 2021 for Unit 3 and November 2022 for Unit 4. This update included initiatives to improve productivity while refining and extending system turnover plans and certain near-term milestone dates. Other milestone dates did not change. Achievement of the aggressive site work plan relies on meeting increased monthly production and activity target values during 2020. To meet these 2020 targets, existing craft, including subcontractors, construction productivity must improve and be sustained above historical average levels, appropriate levels of craft laborers, particularly electrical and pipefitter craft labor, must be maintained, and additional supervision and other field support resources must be retained. Southern Nuclear and Georgia Power continue to believe that pursuit of an aggressive site work plan is an appropriate strategy to achieve completion of the units by their regulatory-approved in-service dates.
As construction, including subcontract work, continues and testing and system turnover activities increase, challenges with management of contractors and vendors; subcontractor performance; supervision of craft labor and related craft labor productivity, particularly in the installation of electrical and mechanical commodities, ability to attract and retain craft labor, and/or related cost escalation; procurement, fabrication, delivery, assembly, installation, system turnover, and the initial testing and start-up, including any required engineering changes or any remediation related thereto, of plant systems, structures, or components (some of which are based on new technology that only within the last few years began initial operation in the global nuclear industry at this scale), or regional transmission upgrades, any of which may require additional labor and/or materials; or other issues could arise and change the projected schedule and estimated cost.
There have been technical and procedural challenges to the construction and licensing of Plant Vogtle Units 3 and 4 at the federal and state level and additional challenges may arise. Processes are in place that are designed to assure compliance with the requirements specified in the Westinghouse Design Control Document and the combined construction and operating licenses, including inspections by Southern Nuclear and the NRC that occur throughout construction. As a result of such compliance

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Southern Company and Subsidiary Companies 2019 Annual Report

processes, certain license amendment requests have been filed and approved or are pending before the NRC. Various design and other licensing-based compliance matters, including the timely submittal by Southern Nuclear of the ITAAC documentation for each unit and the related reviews and approvals by the NRC necessary to support NRC authorization to load fuel, may arise, which may result in additional license amendments or require other resolution. As part of the aggressive site work plan, in January 2020, Southern Nuclear notified the NRC of its intent to load fuel in 2020. If any license amendment requests or other licensing-based compliance issues are not resolved in a timely manner, there may be delays in the project schedule that could result in increased costs.
The ultimate outcome of these matters cannot be determined at this time. However, any extension of the regulatory-approved project schedule is currently estimated to result in additional base capital costs of approximately $50 million per month, based on Georgia Power's ownership interests, and AFUDC of approximately $12 million per month. While Georgia Power is not precluded from seeking recovery of any future capital cost forecast increase, management will ultimately determine whether or not to seek recovery. Any further changes to the capital cost forecast that are not expected to be recoverable through regulated rates will be required to be charged to income and such charges could be material.
Joint Owner Contracts
In November 2017, the Vogtle Owners entered into an amendment to their joint ownership agreements for Plant Vogtle Units 3 and 4 to provide for, among other conditions, additional Vogtle Owner approval requirements. Effective in August 2018, the Vogtle Owners further amended the joint ownership agreements to clarify and provide procedures for certain provisions of the joint ownership agreements related to adverse events that require the vote of the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 to continue construction (as amended, and together with the November 2017 amendment, the Vogtle Joint Ownership Agreements). The Vogtle Joint Ownership Agreements also confirm that the Vogtle Owners' sole recourse against Georgia Power or Southern Nuclear for any action or inaction in connection with their performance as agent for the Vogtle Owners is limited to removal of Georgia Power and/or Southern Nuclear as agent, except in cases of willful misconduct.
As a result of an increase in the total project capital cost forecast and Georgia Power's decision not to seek rate recovery of the increase in the base capital costs in conjunction with the nineteenth VCM report in 2018, the holders of at least 90% of the ownership interests in Plant Vogtle Units 3 and 4 were required to vote to continue construction. In September 2018, the Vogtle Owners unanimously voted to continue construction of Plant Vogtle Units 3 and 4.
Amendments to the Vogtle Joint Ownership Agreements
In connection with the vote to continue construction, Georgia Power entered into (i) a binding term sheet (Vogtle Owner Term Sheet) with the other Vogtle Owners and MEAG Power's wholly-owned subsidiaries MEAG Power SPVJ, LLC (MEAG SPVJ), MEAG Power SPVM, LLC (MEAG SPVM), and MEAG Power SPVP, LLC (MEAG SPVP) to take certain actions which partially mitigate potential financial exposure for the other Vogtle Owners, including additional amendments to the Vogtle Joint Ownership Agreements and the purchase of PTCs from the other Vogtle Owners at pre-established prices, and (ii) a term sheet (MEAG Term Sheet) with MEAG Power and MEAG SPVJ to provide funding with respect to MEAG SPVJ's ownership interest in Plant Vogtle Units 3 and 4 under certain circumstances. On January 14, 2019, Georgia Power, MEAG Power, and MEAG SPVJ entered into an agreement to implement the provisions of the MEAG Term Sheet. On February 18, 2019, Georgia Power, the other Vogtle Owners, and MEAG Power's wholly-owned subsidiaries MEAG SPVJ, MEAG SPVM, and MEAG SPVP entered into certain amendments to the Vogtle Joint Ownership Agreements to implement the provisions of the Vogtle Owner Term Sheet.
The ultimate outcome of these matters cannot be determined at this time.
Regulatory Matters
In 2009, the Georgia PSC voted to certify construction of Plant Vogtle Units 3 and 4 with a certified capital cost of $4.418 billion. In addition, in 2009 the Georgia PSC approved inclusion of the Plant Vogtle Units 3 and 4 related CWIP accounts in rate base, and the State of Georgia enacted the Georgia Nuclear Energy Financing Act, which allows Georgia Power to recover financing costs for Plant Vogtle Units 3 and 4. Financing costs are recovered on all applicable certified costs through annual adjustments to the NCCR tariff up to the certified capital cost of $4.418 billion. At December 31, 2019, Georgia Power had recovered approximately $2.2 billion of financing costs. Financing costs related to capital costs above $4.418 billion are being recognized through AFUDC and are expected to be recovered through retail rates over the life of Plant Vogtle Units 3 and 4; however, Georgia Power will not record AFUDC related to any capital costs in excess of the total deemed reasonable by the Georgia PSC (currently $7.3 billion) and not requested for rate recovery. On December 17, 2019, the Georgia PSC approved Georgia Power's request to decrease the NCCR tariff by $62 million annually, effective January 1, 2020.

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Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power is required to file semi-annual VCM reports with the Georgia PSC by February 28 and August 31 of each year. In 2013, in connection with the eighth VCM report, the Georgia PSC approved a stipulation between Georgia Power and the staff of the Georgia PSC to waive the requirement to amend the Plant Vogtle Units 3 and 4 certificate in accordance with the 2009 certification order until the completion of Plant Vogtle Unit 3, or earlier if deemed appropriate by the Georgia PSC and Georgia Power.
In 2016, the Georgia PSC voted to approve a settlement agreement (Vogtle Cost Settlement Agreement) resolving certain prudency matters in connection with the fifteenth VCM report. In December 2017, the Georgia PSC voted to approve (and issued its related order on January 11, 2018) Georgia Power's seventeenth VCM report and modified the Vogtle Cost Settlement Agreement. The Vogtle Cost Settlement Agreement, as modified by the January 11, 2018 order, resolved the following regulatory matters related to Plant Vogtle Units 3 and 4: (i) none of the $3.3 billion of costs incurred through December 31, 2015 and reflected in the fourteenth VCM report should be disallowed from rate base on the basis of imprudence; (ii) the Contractor Settlement Agreement was reasonable and prudent and none of the amounts paid pursuant to the Contractor Settlement Agreement should be disallowed from rate base on the basis of imprudence; (iii) (a) capital costs incurred up to $5.68 billion would be presumed to be reasonable and prudent with the burden of proof on any party challenging such costs, (b) Georgia Power would have the burden to show that any capital costs above $5.68 billion were prudent, and (c) a revised capital cost forecast of $7.3 billion (after reflecting the impact of payments received under the Guarantee Settlement Agreement and related customer refunds) was found reasonable; (iv) construction of Plant Vogtle Units 3 and 4 should be completed, with Southern Nuclear serving as project manager and Bechtel as primary contractor; (v) approved and deemed reasonable Georgia Power's revised schedule placing Plant Vogtle Units 3 and 4 in service in November 2021 and November 2022, respectively; (vi) confirmed that the revised cost forecast does not represent a cost cap and that prudence decisions on cost recovery will be made at a later date, consistent with applicable Georgia law; (vii) reduced the ROE used to calculate the NCCR tariff (a) from 10.95% (the ROE rate setting point authorized by the Georgia PSC in the 2013 ARP) to 10.00% effective January 1, 2016, (b) from 10.00% to 8.30%, effective January 1, 2020, and (c) from 8.30% to 5.30%, effective January 1, 2021 (provided that the ROE in no case will be less than Georgia Power's average cost of long-term debt); (viii) reduced the ROE used for AFUDC equity for Plant Vogtle Units 3 and 4 from 10.00% to Georgia Power's average cost of long-term debt, effective January 1, 2018; and (ix) agreed that upon Unit 3 reaching commercial operation, retail base rates would be adjusted to include carrying costs on those capital costs deemed prudent in the Vogtle Cost Settlement Agreement. The January 11, 2018 order also stated that if Plant Vogtle Units 3 and 4 are not commercially operational by June 1, 2021 and June 1, 2022, respectively, the ROE used to calculate the NCCR tariff will be further reduced by 10 basis points each month (but not lower than Georgia Power's average cost of long-term debt) until the respective Unit is commercially operational. The ROE reductions negatively impacted earnings by approximately $75 million, $100 million, and $25 million in 2019, 2018, and 2017, respectively, and are estimated to have negative earnings impacts of approximately $140 million, $240 million, and $190 million in 2020, 2021, and 2022, respectively. In its January 11, 2018 order, the Georgia PSC also stated if other conditions change and assumptions upon which Georgia Power's seventeenth VCM report are based do not materialize, the Georgia PSC reserved the right to reconsider the decision to continue construction.
In February 2018, Georgia Interfaith Power & Light, Inc. (GIPL) and Partnership for Southern Equity, Inc. (PSE) filed a petition appealing the Georgia PSC's January 11, 2018 order with the Fulton County Superior Court. In March 2018, Georgia Watch filed a similar appeal to the Fulton County Superior Court for judicial review of the Georgia PSC's decision and denial of Georgia Watch's motion for reconsideration. In December 2018, the Fulton County Superior Court granted Georgia Power's motion to dismiss the two appeals. On January 9, 2019, GIPL, PSE, and Georgia Watch filed an appeal of this decision with the Georgia Court of Appeals. On October 29, 2019, the Georgia Court of Appeals issued an opinion affirming the Fulton County Superior Court's ruling that the Georgia PSC's January 11, 2018 order was not a final, appealable decision. In addition, the Georgia Court of Appeals remanded the case to the Fulton County Superior Court to clarify its ruling as to whether the petitioners showed that review of the Georgia PSC's final order would not provide them an adequate remedy. Georgia Power believes the petitions have no merit; however, an adverse outcome in the litigation combined with subsequent adverse action by the Georgia PSC could have a material impact on Southern Company's and Georgia Power's results of operations, financial condition, and liquidity.
On February 18, 2020, the Georgia PSC approved Georgia Power's twentieth VCM report and its concurrently-filed twenty-first VCM report, including approval of (i) $1.2 billion of construction capital costs incurred from July 1, 2018 through June 30, 2019 and (ii) $21.5 million of expenditures related to Georgia Power's portion of an administrative claim filed in the Westinghouse bankruptcy proceedings (which expenditures had previously been deferred by the Georgia PSC for later approval). Through the twenty-first VCM, the Georgia PSC has approved total construction capital costs incurred through June 30, 2019 of $6.7 billion (before $1.7 billion of payments received under the Guarantee Settlement Agreement and approximately $188 million in related customer refunds). On February 19, 2020, Georgia Power filed its twenty-second VCM report with the Georgia PSC covering the period from July 1, 2019 through December 31, 2019, requesting approval of $674 million of construction capital costs incurred during that period.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The ultimate outcome of these matters cannot be determined at this time.
Mississippi Power
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Mississippi Power at December 31, 2019 and 2018 relate to:
 2019 2018 Note
 (in millions)  
Retiree benefit plans – regulatory assets$213
 $171
 (a)
Asset retirement obligations210
 143
 (b)
Kemper County energy facility assets, net61
 69
 (c)
Remaining net book value of retired assets30
 41
 (d)
Property tax47
 44
 (e)
Deferred charges related to income taxes33
 34
 (b)
Plant Daniel Units 3 and 434
 36
 (f)
ECO Plan carryforward
 26
 (g)
Other regulatory assets48
 28
 (h)
Deferred credits related to income taxes(358) (377) (i)
Other cost of removal obligations(189) (185) (b)
Property damage(55) (56) (j)
Other regulatory liabilities(10) (9) (k)
Total regulatory assets (liabilities), net$64
 $(35)  
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) are approved by the Mississippi PSC and are as follows:
(a)Recovered and amortized over the average remaining service period which may range up to 14 years. See Note 11 for additional information.
(b)Asset retirement and other cost of removal obligations will be settled and trued up upon completion of removal activities over a period to be determined by the Mississippi PSC. Asset retirement and other cost of removal obligations and deferred charges related to income taxes are generally recovered over the related property lives, which may range up to 48 years.
(c)
Includes $78 million of regulatory assets and $18 million of regulatory liabilities that are expected to be fully amortized by 2025 and 2023, respectively. For additional information, see "Kemper County Energy Facility – Rate Recovery" herein.
(d)Retail portion includes approximately $16 million being recovered over a five-year period through 2021 and 2022 for Plant Watson and Plant Greene County, respectively. Wholesale portion includes approximately $14 million being recovered over a 12-year period through 2031 for Plant Watson and Plant Greene County.
(e)
Recovered through the ad valorem tax adjustment clause over a 12-month period beginning in April of the following year. See "Ad Valorem Tax Adjustment" herein for additional information.
(f)Represents the difference between the revenue requirement under purchase accounting and operating lease accounting, which will be amortized over a 10-year period beginning October 2021.
(g)
Generally recovered through the ECO Plan clause in the year following the deferral. See "Environmental Compliance Overview Plan" herein.
(h)Includes $9 million related to vacation pay and $5 million related to other miscellaneous assets, all of which are recorded and recovered over periods not exceeding one year; $6 million related to loss on reacquired debt, which is recorded and amortized over either the remaining life of the original issue, or if refinanced, over the remaining life of the new issue (at December 31, 2019, the amortization periods did not exceed 22 years); and $27 million related to fuel-hedging assets, which are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three years, and are recovered through Mississippi Power's energy cost management clause upon settlement.
(i)
Includes excess deferred income taxes primarily associated with Tax Reform Legislation of $358 million, of which $252 million is related to protected deferred income taxes being recovered over the related property lives, which may range up to 48 years, and $106 million related to unprotected deferred income taxes (not subject to normalization). The unprotected retail portion includes $28 million associated with the Kemper County energy facility being amortized over an eight-year period through 2025. The unprotected wholesale portion includes $18 million of excess deferred income taxes being amortized over three-year periods through 2022. An additional $8 million associated with the System Restoration Rider is being amortized over an eight-year period through 2025. The amortization period for the remaining unprotected deferred income taxes is expected to be determined in the Mississippi Power 2019 Base Rate Case. See "Kemper County Energy Facility" and "Municipal and Rural Associations Tariff" herein and Note 10 for additional information.
(j)
See "System Restoration Rider" herein.
(k)Refunded or amortized generally over periods not exceeding one year.

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Southern Company and Subsidiary Companies 2019 Annual Report

2019 Base Rate Case
On November 26, 2019, Mississippi Power filed a base rate case (Mississippi Power 2019 Base Rate Case) with the Mississippi PSC. The filing includes a requested annual decrease in Mississippi Power's retail rates of $5.8 million, or 0.6%, which is driven primarily by changes in the amortization rates of certain regulatory assets and liabilities and cost reductions, partially offset by an increase in Mississippi Power's requested return on investment and depreciation associated with the filing of an updated depreciation study. The revenue requirements included in the filing are based on a projected test year period of January 1, 2020 through December 31, 2020, a 53% average equity ratio, and a 7.728% return on investment. The filing reflects the elimination of separate rates for costs associated with the Kemper County energy facility and energy efficiency initiatives; those costs are proposed to be included in the PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. On December 10, 2019, the Mississippi PSC suspended the base rate case filing through no later than March 25, 2020. If no further action is taken by the Mississippi PSC, the proposed rates may be effective beginning on March 26, 2020. The ultimate outcome of this matter cannot be determined at this time.
Operations Review
In August 2018, the Mississippi PSC began an operations review of Mississippi Power, for which the final report is expected prior to the conclusion of the Mississippi Power 2019 Base Rate Case. The review includes, but is not limited to, a comparative analysis of its costs, its cost recovery framework, and ways in which it may streamline management operations for the reasonable benefit of ratepayers. The ultimate outcome of this matter cannot be determined at this time.
Reserve Margin Plan
On December 31, 2019, Mississippi Power updated its proposed Reserve Margin Plan (RMP), originally filed in August 2018, as required by the Mississippi PSC. In 2018, Mississippi Power had proposed alternatives to reduce its reserve margin and lower or avoid operating costs, with the most economic alternatives being the two-year and seven-year acceleration of the retirement of Plant Watson Units 4 and 5, respectively, to the first quarter 2022 and the four-year acceleration of the retirement of Plant Greene County Units 1 and 2 to the third quarter 2021 and the third quarter 2022, respectively. The December 2019 update noted that Plant Daniel Units 1 and 2 currently have long-term economics similar to Plant Watson Unit 5. The Plant Greene County unit retirements would require the completion by Alabama Power of proposed transmission and system reliability improvements, as well as agreement by Alabama Power. The RMP filing also states that, in the event the Mississippi PSC ultimately approves an alternative that includes an accelerated retirement, Mississippi Power would require authorization to defer in a regulatory asset for future recovery the remaining net book value of the units at the time of retirement. A decision by the Mississippi PSC that does not include recovery of the remaining book value of any generating units retired could have a material impact on Southern Company's and Mississippi Power's financial statements. The ultimate outcome of this matter cannot be determined at this time. See Note 3 under "Other MattersMississippi Power" for additional information on Plant Daniel Units 1 and 2.
Performance Evaluation Plan
Mississippi Power's retail base rates generally are set under the PEP, a rate plan approved by the Mississippi PSC. Typically, 2 PEP filings are made for each calendar year: the PEP projected filing, which is typically filed prior to the beginning of the year based on a projected revenue requirement, and the PEP lookback filing, which is filed after the end of the year and allows for review of the actual revenue requirement compared to the projected filing.
In February 2018, Mississippi Power revised its annual projected PEP filing for 2018 to reflect the impacts of the Tax Reform Legislation. The revised filing requested an increase of $26 million in annual revenues, based on a performance adjusted ROE of 9.33% and an increased equity ratio of 55%. In July 2018, Mississippi Power and the MPUS entered into a settlement agreement, which was approved by the Mississippi PSC in August 2018, with respect to the 2018 PEP filing and all unresolved PEP filings for prior years (PEP Settlement Agreement). Rates under the PEP Settlement Agreement became effective with the first billing cycle of September 2018. The PEP Settlement Agreement provided for an increase of approximately $21.6 million in annual base retail revenues, which excluded certain compensation costs contested by the MPUS, as well as approximately $2 million subsequently approved for recovery through the 2018 Energy Efficiency Cost Rider. Under the PEP Settlement Agreement, Mississippi Power deferred a portion of the contested compensation costs for 2018 and 2019 as a regulatory asset, which totaled $4 million as of December 31, 2019 and is included in other regulatory assets, deferred on the balance sheet. The Mississippi PSC is expected to rule on the appropriate treatment for such costs in connection with the Mississippi Power 2019 Base Rate Case. The ultimate outcome of this matter cannot be determined at this time.
Pursuant to the PEP Settlement Agreement, Mississippi Power's performance-adjusted allowed ROE is 9.31% and its allowed equity ratio is capped at 51%, pending further review by the Mississippi PSC. In lieu of the requested equity ratio increase, Mississippi Power retained $44 million of excess accumulated deferred income taxes resulting from the Tax Reform Legislation

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

until the conclusion of the Mississippi Power 2019 Base Rate Case. Further, Mississippi Power agreed to seek equity contributions sufficient to restore its equity ratio to 50% by December 31, 2018. Since Mississippi Power's actual average equity ratio for 2018 was more than 1% lower than the 50% target, Mississippi Power deferred the corresponding difference in its revenue requirement of approximately $4 million as a regulatory liability for resolution in the Mississippi Power 2019 Base Rate Case. Pursuant to the PEP Settlement Agreement, PEP proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any PEP filings for regulatory years 2018, 2019, and 2020. The PEP Settlement Agreement also resolved all open PEP filings with no change to customer rates.
Energy Efficiency
In May 2018, the Mississippi PSC issued an order approving Mississippi Power's revised annual projected Energy Efficiency Cost Rider 2018 compliance filing, which increased annual retail revenues by approximately $3 million effective with the first billing cycle for June 2018.
On February 5, 2019, the Mississippi PSC issued an order approving Mississippi Power's Energy Efficiency Cost Rider 2019 compliance filing, which included a slight decrease in annual retail revenues, effective with the first billing cycle in March 2019.
As part of the Mississippi Power 2019 Base Rate Case, Mississippi Power has proposed that the Energy Efficiency Cost Rider be eliminated and those costs be included in the PEP. The ultimate outcome of this matter cannot be determined at this time.
Environmental Compliance Overview Plan
In accordance with a 2011 accounting order from the Mississippi PSC, Mississippi Power has the authority to defer in a regulatory asset for future recovery all plant retirement- or partial retirement-related costs resulting from environmental regulations. The Mississippi PSC approved $41 million and $17 million of costs that were reclassified to regulatory assets associated with the fuel conversion of Plant Watson and Plant Greene County, respectively, for amortization over five-year periods ending in July 2021 and July 2022, respectively.
In August 2018, the Mississippi PSC approved an annual increase in revenues related to the ECO Plan of approximately $17 million, effective with the first billing cycle for September 2018. This increase represented the maximum 2% annual increase in revenues and primarily related to the carryforward from the prior year.
The increase was the result of Mississippi PSC approval of an agreement between Mississippi Power and the MPUS to settle the 2018 ECO Plan filing (ECO Settlement Agreement) and was sufficient to recover costs through 2019, including remaining amounts deferred from prior years along with the related carrying costs. In accordance with the ECO Settlement Agreement, ECO Plan proceedings are suspended until after the conclusion of the Mississippi Power 2019 Base Rate Case and Mississippi Power was not required to make any ECO Plan filings for 2018, 2019, and 2020, with any necessary adjustments reflected in the Mississippi Power 2019 Base Rate Case. The ECO Settlement Agreement contains the same terms as the PEP Settlement Agreement described herein with respect to allowed ROE and equity ratio. At December 31, 2019, Mississippi Power has recorded $2 million in other regulatory liabilities, deferred on the balance sheet related to the actual December 31, 2018 average equity ratio differential from target applicable to the ECO Plan.
On October 24, 2019, the Mississippi PSC approved Mississippi Power's July 9, 2019 request for a CPCN to complete certain environmental compliance projects, primarily associated with the Plant Daniel coal units co-owned 50% with Gulf Power. The total estimated cost is approximately $125 million, with Mississippi Power's share of approximately $66 million being proposed for recovery through its ECO Plan. Approximately $17 million of Mississippi Power's share is associated with ash pond closure and is reflected in Mississippi Power's ARO liabilities. See Note 6 for additional information on AROs and Note 3 under "Other MattersMississippi Power" for additional information on Gulf Power's ownership in Plant Daniel.
Fuel Cost Recovery
Mississippi Power annually establishes and is required to file for an adjustment to the retail fuel cost recovery factor that is approved by the Mississippi PSC. The Mississippi PSC approved an increase of $39 million effective February 2018 and decreases of $35 million and $24 million, effective in February 2019 and 2020, respectively. At December 31, 2019 and 2018, over recovered retail fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on Mississippi Power's balance sheets were approximately $23 million and $8 million, respectively.
Mississippi Power has wholesale MRA and Market Based (MB) fuel cost recovery factors. Effective with the first billing cycle for January 2019, the wholesale MRA fuel rate increased $16 million annually and the wholesale MB fuel rate decreased by an immaterial amount. Effective January 1, 2020, the wholesale MRA fuel rate increased $1 million annually and the wholesale MB fuel rate decreased by an immaterial amount. At December 31, 2019 and 2018, over recovered wholesale MRA fuel costs included in other current liabilities on Southern Company's balance sheets and over recovered regulatory clause liabilities on

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Mississippi Power's balance sheets were approximately $6 million. At December 31, 2019 and 2018, over/under recovered wholesale MB fuel costs included in the balance sheets were immaterial.
Mississippi Power's operating revenues are adjusted for differences in actual recoverable fuel cost and amounts billed in accordance with the currently approved cost recovery rate. Accordingly, changes in the billing factor should have no significant effect on Mississippi Power's revenues or net income but will affect operating cash flows.
Ad Valorem Tax Adjustment
Mississippi Power establishes annually an ad valorem tax adjustment factor that is approved by the Mississippi PSC to collect the ad valorem taxes paid by Mississippi Power. In 2019, 2018, and 2017, the Mississippi PSC approved Mississippi Power's annual ad valorem tax adjustment factor filing, which included rate increases of $2 million, $7 million, and $8 million in 2019, 2018, and 2017, respectively.
System Restoration Rider
Mississippi Power carries insurance for the cost of certain types of damage to generation plants and general property. However, Mississippi Power is self-insured for the cost of storm, fire, and other uninsured casualty damage to its property, including transmission and distribution facilities. As permitted by the Mississippi PSC and the FERC, Mississippi Power accrues for the cost of such damage through an annual expense accrual credited to regulatory liability accounts for the retail and wholesale jurisdictions. The cost of repairing actual damage resulting from such events that individually exceed $50,000 is charged to the reserve. Every three years the Mississippi PSC, the MPUS, and Mississippi Power agree on SRR revenue level(s) for the ensuing period, based on historical data, expected exposure, type and amount of insurance coverage, excluding insurance cost, and any other relevant information. The accrual amount and the reserve balance are determined based on the SRR revenue level(s). If a significant change in circumstances occurs, then the SRR revenue level can be adjusted more frequently if Mississippi Power and the MPUS or the Mississippi PSC deem the change appropriate. The property damage reserve accrual will be the difference between the approved SRR revenues and the SRR revenue requirement, excluding any accrual to the reserve. In addition, SRR allows Mississippi Power to set up a regulatory asset, pending review, if the allowable actual retail property damage costs exceed the amount in the retail property damage reserve. Mississippi Power made retail accruals of $1 million, $1 million, and $3 million for 2019, 2018, and 2017, respectively. Mississippi Power also accrued $0.3 million annually in 2019, 2018, and 2017 for the wholesale jurisdiction. As of December 31, 2019, the property damage reserve balances were $54 million and $1 million for retail and wholesale, respectively.
The SRR rate was 0 for all years presented and Mississippi Power accrued $1 million, $2 million, and $4 million to the property damage reserve in 2019, 2018, and 2017, respectively.
Kemper County Energy Facility
Overview
The Kemper County energy facility was designed to utilize IGCC technology with an expected output capacity of 582 MWs and to be fueled by locally mined lignite (an abundant, lower heating value coal) from a mine owned by Mississippi Power and situated adjacent to the Kemper County energy facility.
Schedule and Cost Estimate
In 2012, the Mississippi PSC issued an order confirming the CPCN originally approved by the Mississippi PSC in 2010 authorizing the acquisition, construction, and operation of the Kemper County energy facility. The order approved a construction cost cap of up to $2.88 billion, with recovery of prudently-incurred costs subject to approval by the Mississippi PSC. The Kemper County energy facility was originally projected to be placed in service in May 2014. Mississippi Power placed the combined cycle and the associated common facilities portion of the Kemper County energy facility in service in August 2014. The combined cycle and associated common facilities portions of the Kemper County energy facility were dedicated as Plant Ratcliffe in April 2018.
In June 2017, the Mississippi PSC stated its intent to issue an order, which occurred in July 2017, directing Mississippi Power to pursue a settlement under which the Kemper County energy facility would be operated as a natural gas plant, rather than an IGCC plant, and address all issues associated with the Kemper County energy facility. The order established a new docket for the purpose of pursuing a global settlement of the related costs (Kemper Settlement Docket). In June 2017, Mississippi Power notified the Mississippi PSC that it would begin a process to suspend operations and start-up activities on the gasifier portion of the Kemper County energy facility, given the uncertainty as to its future.
At the time of project suspension in June 2017, the total cost estimate for the Kemper County energy facility was approximately $7.38 billion, including approximately $5.95 billion of costs subject to the construction cost cap, net of $137 million in additional

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

grants from the DOE received in April 2016. In the aggregate, Mississippi Power had recorded charges to income of $3.07 billion ($1.89 billion after tax) as a result of changes in the cost estimate above the cost cap for the Kemper IGCC through May 2017.
Given the Mississippi PSC's stated intent regarding no further rate increase for the Kemper County energy facility and the subsequent suspension, cost recovery of the gasifier portions became no longer probable; therefore, Mississippi Power recorded an additional charge to income in June 2017 of $2.8 billion ($2.0 billion after tax), which included estimated costs associated with the gasification portions of the plant and lignite mine. During the third and fourth quarters of 2017, Mississippi Power recorded charges to income of $242 million ($206 million after tax), including $164 million for ongoing project costs, estimated mine and gasifier-related costs, and certain termination costs during the suspension period prior to conclusion of the Kemper Settlement Docket, as well as the charge associated with the Kemper Settlement Agreement discussed below.
In 2019, Mississippi Power recorded pre-tax and after-tax charges to income of $24 million, primarily associated with the expected close out of a related DOE contract, as well as other abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets. The after-tax amount for 2019 includes an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. In 2018, Mississippi Power recorded pre-tax charges to income of $37 million ($68 million benefit after tax), primarily associated with abandonment and related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets, as well as the impact of a change in the valuation allowance for the related state income tax NOL carryforward.
Mississippi Power expects to substantially complete mine reclamation activities in 2020 and dismantlement of the abandoned gasifier-related assets and site restoration activities are expected to be completed in 2024. The additional pre-tax period costs associated with dismantlement and site restoration activities, including related costs for compliance and safety, ARO accretion, and property taxes, are estimated to total $17 million in 2020, $15 million to $16 million annually in 2021 through 2023, and $5 million in 2024.
See Note 10 for additional information.
Rate Recovery
In February 2018, the Mississippi PSC voted to approve a settlement agreement related to cost recovery for the Kemper County energy facility among Mississippi Power, the MPUS, and certain intervenors (Kemper Settlement Agreement), which resolved all cost recovery issues, modified the CPCN to limit the Kemper County energy facility to natural gas combined cycle operation, and provided for an annual revenue requirement of approximately $99.3 million for costs related to the Kemper County energy facility, which included the impact of the Tax Reform Legislation. The revenue requirement was based on (i) a fixed ROE for 2018 of 8.6% excluding any performance adjustment, (ii) a ROE for 2019 calculated in accordance with PEP, excluding the performance adjustment, (iii) for future years, a performance-based ROE calculated pursuant to PEP, and (iv) amortization periods for the related regulatory assets and liabilities of eight years and six years, respectively. The revenue requirement also reflects a disallowance related to a portion of Mississippi Power's investment in the Kemper County energy facility requested for inclusion in rate base, which was recorded in the fourth quarter 2017 as an additional charge to income of approximately $78 million ($85 million net of accumulated depreciation of $7 million) pre-tax ($48 million after tax).
Under the Kemper Settlement Agreement, retail customer rates were reduced by approximately $26.8 million annually, effective with the first billing cycle of April 2018, and include no recovery for costs associated with the gasifier portion of the Kemper County energy facility in 2018 or at any future date.
On November 26, 2019, Mississippi Power filed the Mississippi Power 2019 Base Rate Case, which reflects the elimination of separate rates for costs associated with the Kemper County energy facility; these costs are proposed to be included in rates for PEP, ECO Plan, and ad valorem tax adjustment factor, as applicable. The ultimate outcome of this matter cannot be determined at this time.
Lignite Mine and CO2 Pipeline Facilities
Mississippi Power owns the lignite mine and equipment and mineral reserves located around the Kemper County energy facility site. The mine started commercial operation in June 2013. In connection with the Kemper County energy facility construction, Mississippi Power also constructed a pipeline for the transport of captured CO2.
In 2010, Mississippi Power executed a management fee contract with Liberty Fuels Company, LLC (Liberty Fuels), a wholly-owned subsidiary of The North American Coal Corporation, which developed, constructed, and is responsible for the mining operations through the end of the mine reclamation. As the mining permit holder, Liberty Fuels has a legal obligation to perform mine reclamation and Mississippi Power has a contractual obligation to fund all reclamation activities. As a result of the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

abandonment of the Kemper IGCC, final mine reclamation began in 2018 and is expected to be substantially completed in 2020, with monitoring expected to continue through 2027. See Note 6 for additional information.
On December 31, 2019, Mississippi Power transferred ownership of the CO2 pipeline to an unrelated gas pipeline company, with no resulting impact on income. In conjunction with the transfer of the CO2 pipeline, the parties agreed to enter into a 15-year firm transportation agreement, which is expected to be signed by March 2020, providing for the conversion by the pipeline company of the CO2 pipeline to a natural gas pipeline to be used for the delivery of natural gas to Plant Ratcliffe. The agreement will be treated as a finance lease for accounting purposes upon commencement, which is expected to occur by August 2020. See Note 9 for additional information.
Government Grants
In 2010, the DOE, through a cooperative agreement with SCS, agreed to fund $270 million of the Kemper County energy facility through the grants awarded to the project by the DOE under the Clean Coal Power Initiative Round 2. In 2016, additional DOE grants in the amount of $137 million were awarded to the Kemper County energy facility. Through December 31, 2018, Mississippi Power received total DOE grants of $387 million, of which $382 million reduced the construction costs of the Kemper County energy facility and $5 million reimbursed Mississippi Power for expenses associated with DOE reporting. In December 2018, Mississippi Power filed with the DOE its request for property closeout certification under the contract related to the $387 million of grants received. Mississippi Power expects to close out the DOE contract related to the Kemper County energy facility in 2020. In connection with the DOE closeout discussions, on April 29, 2019, the Civil Division of the Department of Justice informed Southern Company and Mississippi Power of an investigation related to the Kemper County energy facility. The ultimate outcome of this matter cannot be determined at this time; however, it could have a material impact on Southern Company's and Mississippi Power's financial statements.
Municipal and Rural Associations Tariff
Mississippi Power provides wholesale electric service to Cooperative Energy, East Mississippi Electric Power Association, and the City of Collins, all located in southeastern Mississippi, under a long-term, cost-based, FERC-regulated MRA tariff.
In 2017, Mississippi Power and Cooperative Energy executed, and the FERC accepted, a Shared Service Agreement (SSA), as part of the MRA tariff, under which Mississippi Power and Cooperative Energy will share in providing electricity to the Cooperative Energy delivery points under the tariff, effective January 1, 2018. The SSA may be cancelled by Cooperative Energy with 10 years notice after December 31, 2020. As of December 31, 2019, Cooperative Energy has the option to decrease its use of Mississippi Power's generation services under the MRA tariff up to 2.5% annually, with required notice, up to a maximum total reduction of 11%, or approximately $9 million in cumulative annual base revenues.
On May 7, 2019, the FERC accepted Mississippi Power's requested $3.7 million annual decrease in MRA base rates effective January 1, 2019, as agreed upon in a settlement agreement reached with its wholesale customers resolving all matters related to the Kemper County energy facility, similar to the retail rate settlement agreement approved by the Mississippi PSC in February 2018, and reflecting the impacts of the Tax Reform Legislation.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
Regulatory Assets and Liabilities
Regulatory assets and (liabilities) reflected in the balance sheets of Southern Company Gas at December 31, 2019 and 2018 relate to:
 2019 2018 Note
 (in millions)  
Environmental remediation$296
 $311
 (a,b)
Retiree benefit plans167
 161
 (a,c)
Long-term debt fair value adjustment107
 121
 (d)
Under recovered regulatory clause revenues72
 90
 (e)
Other regulatory assets68
 59
 (f)
Other cost of removal obligations(1,606) (1,585) (g)
Deferred income tax credits(874) (940) (g,i)
Over recovered regulatory clause revenues(82) (43) (e)
Other regulatory liabilities(22) (46) (h)
Total regulatory assets (liabilities), net$(1,874) $(1,872)  
Note: Unless otherwise noted, the recovery and amortization periods for these regulatory assets and (liabilities) have been approved or accepted by the relevant state PSC or other regulatory body and are as follows:
(a)Not earning a return as offset in rate base by a corresponding asset or liability.
(b)Recovered through environmental cost recovery mechanisms when the remediation work is performed. See Note 3 for additional information.
(c)Recovered and amortized over the average remaining service period which range up to 15 years. See Note 11 for additional information.
(d)Recovered over the remaining life of the original debt issuances at acquisition, which range up to 19 years as of December 31, 2019.
(e)Recorded and recovered or amortized over periods generally not exceeding six years. In addition to natural gas cost recovery mechanisms, the natural gas distribution utilities have various other cost recovery mechanisms for the recovery of costs, including those related to infrastructure replacement programs.
(f)
Includes financial instrument-hedging assets totaling $11 million and $8 million at December 31, 2019 and 2018, respectively, which are recorded over the life of the underlying hedged purchase contracts generally not exceeding two years, vacation pay assets totaling $11 million at both December 31, 2019 and 2018, which are recorded as earned by employees and recovered as paid, generally within one year, and several other miscellaneous components, which are recovered or amortized over periods generally not exceeding eight years.
(g)Other cost of removal obligations are recorded and deferred income tax liabilities are amortized over the related property lives, which may range up to 80 years. Cost of removal liabilities will be settled and trued up following completion of the related activities.
(h)
Comprised of numerous components, including amounts to be refunded to customers as a result of the Tax Reform Legislation and energy efficiency programs, which are recovered or amortized over remaining periods generally not exceeding 20 years. Upon final settlement, actual energy efficiency program costs incurred are recovered, and actual income earned is refunded through the energy cost recovery clause. See "Rate Proceedings" herein for additional information regarding customer refunds resulting from the Tax Reform Legislation.
(i)
As of December 31, 2019, includes $12 million of excess deferred income tax liabilities not subject to normalization as a result of the Tax Reform Legislation which are being amortized through 2024. See "Rate Proceedings" herein and Note 10 for additional details.
Infrastructure Replacement Programs and Capital Projects
In addition to capital expenditures recovered through base rates by each of the natural gas distribution utilities, Nicor Gas and Virginia Natural Gas have separate rate riders that provide timely recovery of capital expenditures for specific infrastructure replacement programs. Descriptions of the infrastructure replacement programs and capital projects at the natural gas distribution utilities follow.
Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customers as a result of any infrastructure investments shall not exceed a cumulative annual average of 4.0% or, in any given year, 5.5% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, subject to annual review. In conjunction with the base rate case order issued by the Illinois Commission in January 2018, Nicor Gas is recovering program costs incurred prior to December 31, 2017 through base rates. Additionally, the Illinois Commission's approval of Nicor Gas' rate case on October 2, 2019 included $65 million in annual revenues related to the recovery of program costs from January 1, 2018 through September 30, 2019 under the Investing in Illinois program. See "Rate Proceedings" herein for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Virginia Natural Gas
In 2012, the Virginia Commission approved the Steps to Advance Virginia's Energy (SAVE) program, an accelerated infrastructure replacement program. In 2016 and on September 25, 2019, the Virginia Commission approved amendments and extensions to the SAVE program. The latest extension allows Virginia Natural Gas to continue replacing aging pipeline infrastructure through 2024 and increases its authorized investment under the previously-approved plan from $35 million to $40 million in 2019 with additional annual investments of $50 million in 2020, $60 million in 2021, $70 million in each year from 2022 through 2024, and a total potential variance of up to $5 million allowed for the program, for a maximum total investment over the six-year term (2019 through 2024) of $365 million.
The SAVE program is subject to annual review by the Virginia Commission. In accordance with the base rate case order issued by the Virginia Commission in 2017, Virginia Natural Gas is recovering program costs incurred prior to September 1, 2017 through base rates. Program costs incurred subsequent to September 1, 2017 are currently recovered through a separate rider and are subject to future base rate case proceedings.
On December 6, 2019, Virginia Natural Gas filed an application with the Virginia Commission for a 24.1-mile header improvement project to improve resiliency and increase the supply of natural gas delivered to energy suppliers, including Virginia Natural Gas. The cost of the project is expected to total $346 million. The Virginia Commission is expected to rule on this application in the second quarter 2020. Construction is expected to begin in June 2021 and the project is expected to be placed in service in the fourth quarter 2022. The ultimate outcome of this matter cannot be determined at this time.
Atlanta Gas Light
GRAM
In December 2019, the Georgia PSC approved the continuation of GRAM as part of Atlanta Gas Light's 2019 rate case order. Various infrastructure programs previously authorized by the Georgia PSC, including the Integrated Vintage Plastic Replacement Program to replace aging plastic pipe and the Integrated System Reinforcement Program to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, continue under GRAM and the recovery of and return on the infrastructure program investments are included in annual base rate adjustments. The future expected costs to be recovered through rates related to allowed, but not incurred, costs are recognized in an unrecognized ratemaking amount that is not reflected on the balance sheets. This allowed cost is primarily the equity return on the capital investment under the infrastructure programs in place prior to GRAM. See "Unrecognized Ratemaking Amounts"herein for additional information. The Georgia PSC reviews Atlanta Gas Light's performance annually under GRAM. See "Rate Proceedings" herein for additional information.
Pursuant to the GRAM approval, Atlanta Gas Light and the staff of the Georgia PSC agreed to a variation of the Integrated Customer Growth Program to extend pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. As a result, a new tariff was created, effective October 10, 2017, to provide up to $15 million annually for Atlanta Gas Light to commit to strategic economic development projects. Projects under this tariff must be approved by the Georgia PSC.
PRP
Atlanta Gas Light previously recovered PRP costs through a PRP surcharge established in 2015 to address recovery of the under recovered PRP balance and the related carrying costs. The under recovered balance at December 31, 2019 was $135 million, including $70 million of unrecognized equity return. Effective January 2018, PRP costs are being recovered through GRAM and base rates until the earlier of the full recovery of the under recovered amount or December 31, 2025.
One of the capital projects under the PRP experienced construction issues and Atlanta Gas Light was required to complete mitigation work prior to placing it in service. These mitigation costs were included in base rates in 2018. In 2017, Atlanta Gas Light recovered $20 million from the settlement of contractor litigation claims and recovered an additional $7 million from the final settlement of contractor litigation claims during the first quarter 2018. Mitigation costs recovered through the legal process are retained by Atlanta Gas Light.
Natural Gas Cost Recovery
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Changes in the billing factor will not have a significant effect on Southern Company's or Southern Company Gas' revenues or net income, but will affect cash flows. At December 31, 2019 and 2018, the over recovered balances were $74 million and

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

$15 million, respectively, which were included in other regulatory liabilities on Southern Company's and Southern Company Gas' balance sheets.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The resulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
In February 2018, Atlanta Gas Light revised its annual base rate filing to reflect the impacts of the Tax Reform Legislation and requested a $16 million rate reduction. In May 2018, the Georgia PSC approved a stipulation for Atlanta Gas Light's annual base rates to remain at the 2017 level for 2018 and 2019, with customer credits of $8 million in each of July 2018 and October 2018 to reflect the impacts of the Tax Reform Legislation. The Georgia PSC maintained Atlanta Gas Light's previously authorized earnings band based on a ROE between 10.55% and 10.95% and increased the allowed equity ratio by 4% to an equity ratio of 55% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation.
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In 2017, the Virginia Commission approved a settlement for a $34 million increase in annual base rate revenues, effective September 1, 2017, including $13 million related to the recovery of investments under the SAVE program. See "Infrastructure Replacement Programs and Capital Projects" herein for additional information. An authorized ROE range of 9.0% to 10.0% with a midpoint of 9.5% will be used to determine the revenue requirement in any filing, other than for a change in base rates.
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to lower tax expense as a result of the Tax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110

3. CONTINGENCIES, COMMITMENTS, AND GUARANTEES
General Litigation Matters
The Registrants are involved in various other matters being litigated and regulatory matters. The ultimate outcome of such pending or potential litigation or regulatory matters against each Registrant and any subsidiaries cannot be determined at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on such Registrant's financial statements.
The Registrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.
Southern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on 2 agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and 3 members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included 4 additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 under "Kemper County Energy Facility" for additional information.
Southern Power
Southern Power indirectly owns a 51% membership interest in RE Roserock LLC (Roserock), the owner of the Roserock facility in Pecos County, Texas. Prior to the facility being placed in service in 2016, certain solar panels were damaged during installation by the construction contractor, McCarthy Building Companies, Inc. (McCarthy), and certain solar panels were damaged by a hail event that also occurred during construction. In connection therewith, Southern Power withheld payment of approximately $26 million to the construction contractor, which placed a lien on the Roserock facility for the same amount. In 2017, Roserock filed a lawsuit in the state district court in Pecos County, Texas against XL Insurance America, Inc. and North American Elite Insurance Company seeking recovery from an insurance policy for damages resulting from the hail event and McCarthy's installation practices. In June 2018, the court granted Roserock's motion for partial summary judgment, finding that the insurers were in breach of contract and in violation of the Texas Insurance Code for failing to pay any monies owed for the hail claim. Separate lawsuits were filed between Roserock and McCarthy, as well as other parties, and that litigation was consolidated in the U.S. District Court for the Western District of Texas. On April 18, 2019, Roserock and the parties to the state and federal lawsuits executed a settlement agreement and mutual release that resolved both lawsuits. Following execution of the agreement, the lawsuits were dismissed, Southern Power paid McCarthy the amounts previously withheld, and McCarthy released its lien. As part of the settlement, Roserock received funds that covered all related legal costs, damages, and the replacement costs of certain solar panels. Funds received by Southern Power in excess of the initial replacement costs were recognized as a gain and included in other income (expense), net, with a portion allocated to noncontrolling interests. As a result, Southern Power recognized a $12 million after-tax gain in the second quarter 2019.
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and the natural gas distribution utilities conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in the financial statements. A liability for environmental remediation costs is recognized only when a loss is determined to be probable and reasonably estimable. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia have each received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. At December 31, 2019 and 2018, the environmental remediation liabilities of Alabama Power and Mississippi Power were immaterial.
Georgia Power has been designated or identified as a potentially responsible party at sites governed by the Georgia Hazardous Site Response Act and/or by the federal Comprehensive Environmental Response, Compensation, and Liability Act, and assessment and potential cleanup of such sites is expected. For all years presented, Georgia Power recovered approximately $2 million annually through the ECCR tariff. Effective January 1, 2020, Georgia Power is recovering approximately $12 million annually through the ECCR tariff under the 2019 ARP. Georgia Power recognizes a liability for environmental remediation costs only when it determines a loss is probable and reasonably estimable and reduces the reserve as expenditures are incurred. Any difference between the liabilities accrued and costs recovered through rates is deferred as a regulatory asset or liability. The annual recovery amount is expected to be adjusted in future regulatory proceedings.
On December 23, 2019, Mississippi Power entered into an agreement with the Mississippi Commission on Environmental Quality related to groundwater conditions arising from the closed ash pond at Plant Watson. Mississippi Power paid a civil penalty of $200,000 and will complete an assessment and remediation consistent with the requirements of the agreement and the CCR Rule. It is anticipated that corrective action will be needed; however, an estimate of remedial costs will not be available until further site assessment is completed. Mississippi Power expects to recover the retail portion of remedial costs through the ECO Plan and the wholesale portion through MRA rates.
Southern Company Gas is subject to environmental remediation liabilities associated with 40 former MGP sites in 4 different states. Southern Company Gas' accrued environmental remediation liability at December 31, 2019 and 2018 was based on the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

estimated cost of environmental investigation and remediation associated with known current and former MGP operating sites. These environmental remediation expenditures are generally recoverable from customers through rate mechanisms approved by the applicable state regulatory agencies of the natural gas distribution utilities.
At December 31, 2019 and 2018, the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the balance sheets as follows:
 Southern Company
Georgia
Power
Southern Company Gas
 (in millions)
December 31, 2019:   
Environmental remediation liability:   
Other current liabilities$51
$15
$36
Accrued environmental remediation234

233
Under recovered environmental remediation costs:   
Other regulatory assets, current$49
$12
$37
Other regulatory assets, deferred300
40
260
    
December 31, 2018:   
Environmental remediation liability:   
Other current liabilities$49
$23
$26
Accrued environmental remediation268

268
Under recovered environmental remediation costs:   
Other regulatory assets, current$21
$2
$19
Other regulatory assets, deferred345
53
292

The ultimate outcome of these matters cannot be determined at this time; however, as a result of the regulatory treatment for environmental remediation expenses described above, the final disposition of these matters is not expected to have a material impact on the financial statements of the applicable Registrants.
Nuclear Fuel Disposal Costs
Acting through the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. government entered into contracts with Alabama Power and Georgia Power that require the DOE to dispose of spent nuclear fuel and high level radioactive waste generated at Plants Farley, Hatch, and Vogtle Units 1 and 2 beginning no later than January 31, 1998. The DOE has yet to commence the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, Alabama Power and Georgia Power pursued and continue to pursue legal remedies against the U.S. government for its partial breach of contract.
In 2014, Alabama Power and Georgia Power filed lawsuits against the U.S. government for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extended to December 31, 2014. On June 12, 2019, the Court of Federal Claims granted Alabama Power's and Georgia Power's motion for summary judgment on damages not disputed by the U.S. government, awarding those undisputed damages to Alabama Power and Georgia Power. However, those undisputed damages are not collectible and no amounts will be recognized in the financial statements until the court enters final judgment on the remaining damages.
In 2017, Alabama Power and Georgia Power filed additional lawsuits against the U.S. government in the Court of Federal Claims for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2015 through December 31, 2017. Damages will continue to accumulate until the issue is resolved, the U.S. government disposes of Alabama Power's and Georgia Power's spent nuclear fuel pursuant to its contractual obligations, or alternative storage is otherwise provided. No amounts have been recognized in the financial statements as of December 31, 2019 for any potential recoveries from the pending lawsuits.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The final outcome of these matters cannot be determined at this time. However, Alabama Power and Georgia Power expect to credit any recoveries for the benefit of customers in accordance with direction from their respective PSC; therefore, no material impact on Southern Company's, Alabama Power's, or Georgia Power's net income is expected.
On-site dry spent fuel storage facilities are operational at all 3 plants and can be expanded to accommodate spent fuel through the expected life of each plant.
Nuclear Insurance
Under the Price-Anderson Amendments Act (Act), Alabama Power and Georgia Power maintain agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at the companies' nuclear power plants. The Act provides funds up to $13.9 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $450 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. A company could be assessed up to $138 million per incident for each licensed reactor it operates but not more than an aggregate of $20 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for Alabama Power and Georgia Power, based on its ownership and buyback interests in all licensed reactors, is $275 million and $267 million, respectively, per incident, but not more than an aggregate of $41 million and $40 million, respectively, to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. The next scheduled adjustment is due no later than November 1, 2023. See Note 5 under "Joint Ownership Agreements" for additional information on joint ownership agreements.
Alabama Power and Georgia Power are members of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, both companies have NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses and policies providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks, with a maximum per occurrence per unit limit of $490 million. After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted. Alabama Power and Georgia Power each purchase limits based on the projected full cost of replacement power, subject to ownership limitations, and have each elected a 12-week deductible waiting period for each nuclear plant.
A builders' risk property insurance policy has been purchased from NEIL for the construction of Plant Vogtle Units 3 and 4. This policy provides the Vogtle Owners up to $2.75 billion for accidental property damage occurring during construction.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for Alabama Power and Georgia Power as of December 31, 2019 under the NEIL policies would be $58 million and $85 million, respectively.
Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the applicable company or to its debt trustees as may be appropriate under the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered from customers, would be borne by Alabama Power or Georgia Power, as applicable, and could have a material effect on Southern Company's, Alabama Power's, and Georgia Power's financial condition and results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Other Matters
Southern Company
As discussed in Note 1 under "Leveraged Leases," a subsidiary of Southern Holdings has several leveraged lease agreements. The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of 1 of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation. While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Alabama Power
On October 16, 2019, Alabama Power agreed to a consent order regarding a fish kill investigation. The consent order required Alabama Power to pay approximately $50,000 to the Alabama Department of Environmental Management in civil penalties and approximately $172,000 to the Alabama Department of Conservation and Natural Resources in fish restocking costs. Alabama Power paid the penalties and restocking costs during the fourth quarter 2019.
Mississippi Power
In 2013, Mississippi Power submitted a lost revenue claim under the Deepwater Horizon Economic and Property Damages Settlement Agreement associated with the oil spill that occurred in the Gulf of Mexico in 2010. In May 2018, Mississippi Power's claim was settled. The settlement proceeds of $18 million, net of expenses and income tax, were included in Mississippi Power's earnings for 2018. Mississippi Power received half of the settlement proceeds in 2018 and half in 2019.
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
Gas Pipeline Projects
At December 31, 2019, Southern Company Gas was involved in 2 gas pipeline construction projects, the Atlantic Coast Pipeline project and the PennEast Pipeline project.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction on the PennEast Pipeline. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.
Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in 2 phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was 0 impairment as of December 31, 2019.
See Note 3 under "Guarantees" and Note 7 under "Southern Company Gas" for additional information.
Natural Gas Storage Facilities
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of 2 salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not return to service by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has 2 other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million at December 31, 2019.
The ultimate outcome of these matters cannot be determined at this time, but could have a material impact on the financial statements of Southern Company and Southern Company Gas.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Commitments
To supply a portion of the fuel requirements of the Southern Company system's electric generating plants, the Southern Company system has entered into various long-term commitments not recognized on the balance sheets for the procurement and delivery of fossil fuel and, for Alabama Power and Georgia Power, nuclear fuel. The majority of the Registrants' fuel expense for the periods presented was purchased under long-term commitments. Each Registrant expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
Georgia Power has commitments, in the form of capacity purchases, regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity are required whether or not any capacity is available. Portions of the capacity payments made to MEAG Power for its Plant Vogtle Units 1 and 2 investment relate to costs in excess of Georgia Power's allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity is included in purchased power in Southern Company's statements of income and in purchased power, non-affiliates in Georgia Power's statements of income. Georgia Power's capacity payments related to this commitment totaled $6 million, $8 million, and $9 million in 2019, 2018, and 2017, respectively. At December 31, 2019, Georgia Power's estimated long-term obligations related to this commitment totaled $56 million, consisting of $5 million for 2020, $5 million for 2021, $4 million for 2022, $3 million for 2023, $4 million for 2024, and $35 million for 2025 and thereafter.
See Note 9 for information regarding PPAs accounted for as leases.
Southern Company Gas has commitments for pipeline charges, storage capacity, and gas supply, including charges recoverable through natural gas cost recovery mechanisms or, alternatively, billed to marketers selling retail natural gas, as well as demand charges associated with Southern Company Gas' wholesale gas services. Gas supply commitments include amounts for gas commodity purchases associated with Southern Company Gas' gas marketing services of 45 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2019 and valued at $84 million. Southern Company Gas provides guarantees to certain wholly-ownedgas suppliers for certain of its subsidiaries in support of payment obligations. Southern Company Gas' expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets at December 31, 2019 were as follows:
 Pipeline Charges, Storage Capacity, and Gas Supply
 (in millions)
2020$725
2021559
2022526
2023454
2024330
2025 and thereafter1,677
Total$4,271

Guarantees
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the traditional electric operating companies and Southern Power. Under these agreements, each of the traditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with each of the traditional electric operating companies to ensure they will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.
Alabama Power has guaranteed a $100 million principal amount long-term bank loan entered into by SEGCO in November 2018. Georgia Power has agreed to reimburse Alabama Power for the portion of such obligation corresponding to Georgia Power's proportionate ownership of SEGCO's stock if Alabama Power is called upon to make such payment under its guarantee. At December 31, 2019, the capitalization of SEGCO consisted of $87 million of equity and $100 million of long-term debt, on which the annual interest requirement is derived from a variable rate index. In addition, SEGCO had short-term debt outstanding of $26 million. See Note 7 under "SEGCO" for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In 2017, Atlantic Coast Pipeline executed a $3.4 billion revolving credit facility with a stated maturity date of October 2021. Southern Company Gas entered into a guarantee agreement to support its share of the revolving credit facility. Southern Company Gas' maximum exposure to loss under the terms of the guarantee is limited to 5% of the outstanding borrowings under the credit facility, and totaled $88 million as of December 31, 2019. See "Other MattersSouthern Company GasGas Pipeline Projects" herein and Note 7 under "Southern Company Gas" for additional information regarding the Atlantic Coast Pipeline.
As discussed in Note 9, Alabama Power and Georgia Power have entered into certain residual value guarantees related to railcar leases.
4. REVENUE FROM CONTRACTS WITH CUSTOMERS
The Registrants generate revenues from a variety of sources, some of which are not accounted for as revenue from contracts with customers, such as leases, derivatives, and certain cost recovery mechanisms. ASC 606 became effective on January 1, 2018 and the Registrants adopted it using the modified retrospective method applied to open contracts and only to the version of contracts in effect as of January 1, 2018. In accordance with the modified retrospective method, the Registrants' previously issued financial statements have not been restated to comply with ASC 606 and the Registrants did not have a cumulative-effect adjustment to retained earnings. See Note 1 under "Revenues" for additional information on the revenue policies of the Registrants. See Notes 9 and 14 for additional information on revenue accounted for under lease and derivative accounting guidance, respectively.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following tables disaggregate revenue from contracts with customers for 2019 and 2018:
2019Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Operating revenues      
Retail electric revenues      
Residential$6,164
$2,509
$3,377
$278
$
$
Commercial5,065
1,677
3,097
291


Industrial3,126
1,460
1,360
306


Other90
25
54
11


Total retail electric revenues14,445
5,671
7,888
886


Natural gas distribution revenues      
Residential1,413




1,413
Commercial389




389
Transportation907




907
Industrial35




35
Other245




245
Total natural gas distribution revenues2,989




2,989
Wholesale electric revenues      
PPA energy revenues833
145
60
11
648

PPA capacity revenues453
102
54
3
322

Non-PPA revenues232
81
9
352
238

Total wholesale electric revenues1,518
328
123
366
1,208

Other natural gas revenues      
Gas pipeline investments32




32
Wholesale gas services2,095




2,095
Gas marketing services440




440
Other natural gas revenues42




42
Total natural gas revenues2,609




2,609
Other revenues1,035
153
407
19
12

Total revenue from contracts with customers22,596
6,152
8,418
1,271
1,220
5,598
Other revenue sources(a)
4,266
(27)(10)(7)718
3,637
Other adjustments(b)
(5,443)



(5,443)
Total operating revenues$21,419
$6,125
$8,408
$1,264
$1,938
$3,792
(a)Other revenue sources primarily relate to revenues from customers accounted for as derivatives and leases, as well as alternative revenues program at Southern Company Gas and other cost recovery mechanisms at the traditional electric operating companies.
(b)
Other adjustments relate to the cost of Southern Company Gas' energy and risk management activities. Wholesale gas services revenues are presented net of the related costs of those activities on the statement of income. See Note 16 under "Southern Company Gas" for additional information on the components of wholesale gas services' operating revenues.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2018Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Operating revenues      
Retail electric revenues      
Residential$6,586
$2,285
$3,295
$277
$
$
Commercial5,255
1,541
3,025
290


Industrial3,152
1,364
1,321
326


Other94
25
56
9


Total retail electric revenues15,087
5,215
7,697
902


Natural gas distribution revenues      
Residential1,525




1,525
Commercial436




436
Transportation944




944
Industrial40




40
Other230




230
Total natural gas distribution revenues3,175




3,175
Wholesale electric revenues      
PPA energy revenues950
158
81
15
727

PPA capacity revenues498
101
53
6
394

Non-PPA revenues263
119
24
329
230

Total wholesale electric revenues1,711
378
158
350
1,351

Other natural gas revenues      
Gas pipeline investments32




32
Wholesale gas services3,083




3,083
Gas marketing services571




571
Other natural gas revenues53




53
Total other natural gas revenues3,739




3,739
Other revenues1,529
210
236
22
13

Total revenue from contracts with customers25,241
5,803
8,091
1,274
1,364
6,914
Other revenue sources(a)
5,108
229
329
(9)841
3,849
Other adjustments(b)
(6,854)



(6,854)
Total operating revenues$23,495
$6,032
$8,420
$1,265
$2,205
$3,909
(a)Other revenue sources primarily relate to revenues from customers accounted for as derivatives and leases, as well as alternative revenues program at Southern Company Gas and other cost recovery mechanisms at the traditional electric operating companies.
(b)
Other adjustments relate to the cost of Southern Company Gas' energy and risk management activities. Wholesale gas services revenues are presented net of the related costs of those activities on the statement of income. See Note 16 under "Southern Company Gas" for additional information on the components of wholesale gas services' operating revenues.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Contract Balances
The following table reflects the closing balances of receivables, contract assets, and contract liabilities related to revenues from contracts with customers at December 31, 2019 and 2018:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Accounts Receivables      
As of December 31, 2019$2,413
$586
$688
$79
$97
$749
As of December 31, 20182,630
520
721
100
118
952
Contract Assets      
As of December 31, 2019$117
$
$69
$
$
$
As of December 31, 2018102

58



Contract Liabilities      
As of December 31, 2019$52
$10
$13
$
$1
$1
As of December 31, 201832
12
7

11
2
As of December 31, 2019 and 2018, Georgia Power had contract assets primarily related to fixed retail customer bill programs, where the payment is contingent upon Georgia Power's continued performance and the customer's continued participation in the program over the one-year contract term, and unregulated service agreements, where payment is contingent on project completion. Alabama Power had contract liabilities for outstanding performance obligations primarily related to extended service agreements. Contract liabilities for Georgia Power and Southern Power relate to cash collections recognized in advance of revenue for certain unregulated service agreements and certain levelized PPAs, respectively. Southern Company's unregulated distributed generation business had contract assets of $40 million and $39 million at December 31, 2019 and 2018, respectively, and contract liabilities of $28 million and $11 million at December 31, 2019 and 2018, respectively, for outstanding performance obligations.
The following table reflects revenue from contracts with customers recognized in 2019 included in the contract liability at December 31, 2018:
 Southern CompanyAlabama PowerGeorgia PowerSouthern PowerSouthern Company Gas
 (in millions)
Revenue Recognized     
2019$30
$11
$6
$11
$2


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Remaining Performance Obligations
The traditional electric operating companies and Southern Power have long-term contracts with customers in which revenues are recognized as performance obligations are satisfied over the contract term. These contracts primarily relate to PPAs whereby the traditional electric operating companies and Southern Power provide electricity and generation capacity to a customer. The revenue recognized for the delivery of electricity is variable; however, certain PPAs include a fixed payment for fixed generation capacity over the term of the contract. Southern Company's unregulated distributed generation business also has partially satisfied performance obligations related to certain fixed price contracts. Revenues from contracts with customers related to these performance obligations remaining at December 31, 2019 are expected to be recognized as follows:
 202020212022202320242025 and
Thereafter
 (in millions)
Southern Company$490
$430
$336
$324
$323
$2,108
Alabama Power21
25
22
22
22
118
Georgia Power60
49
32
32
23
61
Southern Power287
280
281
271
279
1,948

Revenue expected to be recognized for performance obligations remaining at December 31, 2019 was immaterial for Mississippi Power.
5. PROPERTY, PLANT, AND EQUIPMENT
Property, plant, and equipment is stated at original cost or fair value at acquisition, as appropriate, less any regulatory disallowances and impairments. Original cost may include: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and/or cost of equity funds used during construction.
The Registrants' property, plant, and equipment in service consisted of the following at December 31, 2019 and 2018:
At December 31, 2019:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas

(in millions)
Electric utilities:

     
Generation$50,329
$15,329
$18,341
$2,786
$13,241
$
Transmission12,157
4,719
6,590
808


Distribution19,846
7,798
11,024
1,024


General/other4,650
2,177
2,182
239
29

Electric utilities' plant in service86,982
30,023
38,137
4,857
13,270

Southern Company Gas:

     
Natural gas distribution utilities transportation and distribution13,518




13,518
Storage facilities1,634




1,634
Other1,192




1,192
Southern Company Gas plant in service16,344




16,344
Other plant in service1,788





Total plant in service$105,114
$30,023
$38,137
$4,857
$13,270
$16,344

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2018:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Electric utilities:      
Generation$52,324
$16,533
$19,145
$2,849
$13,246
$
Transmission11,344
4,380
6,156
769


Distribution18,746
7,389
10,389
968


General/other4,446
2,100
1,985
314
25

Electric utilities' plant in service86,860
30,402
37,675
4,900
13,271

Southern Company Gas:    

 
Natural gas distribution utilities transportation and distribution12,409




12,409
Storage facilities1,640




1,640
Other1,128




1,128
Southern Company Gas plant in service15,177




15,177
Other plant in service1,669





Total plant in service$103,706
$30,402
$37,675
$4,900
$13,271
$15,177

The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed with the exception of nuclear refueling costs and certain maintenance costs including those described below.
In accordance with orders from their respective state PSCs, Alabama Power and Georgia Power defer nuclear outage operations and maintenance expenses to a regulatory asset when the charges are incurred. Alabama Power amortizes the costs over a subsequent 18-month period with Plant Farley's fall outage cost amortization beginning in January of the following year and spring outage cost amortization beginning in July of the same year. Georgia Power amortizes its costs over each unit's operating cycle, or 18 months for Plant Vogtle Units 1 and 2 and 24 months for Plant Hatch Units 1 and 2.
A portion of Mississippi Power's railway track maintenance costs is charged to fuel stock and recovered through Mississippi Power's fuel clause.
The portion of Southern Company Gas' non-working gas used to maintain the structural integrity of natural gas storage facilities that is considered to be non-recoverable is depreciated, while the recoverable or retained portion is not depreciated.
Finance Leases
Assets acquired under a finance lease (previously referred to as a capital lease) are included in property, plant, and equipment and are further detailed in the table below for the applicable Registrants at December 31, 2018:
At December 31, 2018:Southern Company
Georgia
Power
 (in millions)
Office buildings$216
$61
PPAs(*)

144
Computer-related equipment43

Gas pipeline7

Less: Accumulated amortization(75)(84)
Balance, net of amortization$191
$121
(*)
Represents Georgia Power's affiliate PPAs with Southern Power. See Note 1 under "Affiliate Transactions" for additional information.
See Note 9 for additional information, including finance lease right-of-use (ROU) assets, net included in property, plant, and equipment at December 31, 2019.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Depreciation and Amortization
The traditional electric operating companies' and Southern Company Gas' depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates. The approximate rates for 2019, 2018, and 2017 are as follows:
 201920182017
Alabama Power3.1%3.0%2.9%
Georgia Power2.6%2.6%2.7%
Mississippi Power3.7%4.2%3.4%
Southern Company Gas2.9%2.9%2.9%

Depreciation studies are conducted periodically to update the composite rates. These studies are filed with the respective state PSC and/or other applicable state and federal regulatory agencies for the traditional electric operating companies and natural gas distribution utilities. Effective January 1, 2020, Georgia Power's and Atlanta Gas Light's depreciation rates were revised by the Georgia PSC in connection with their respective base rate cases. On November 26, 2019, an updated depreciation study was filed with the Mississippi PSC in conjunction with the Mississippi Power 2019 Base Rate Case requesting a $16 million increase in total annual depreciation. See Note 2 for additional information.
When property, plant, and equipment subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the asset are retired when the related property unit is retired.
At December 31, 2019 and 2018, accumulated depreciation for utility plant in service totaled $30.0 billion and $30.3 billion, respectively, for Southern Company and $4.5 billion and $4.3 billion, respectively, for Southern Company Gas.
Depreciation of the original cost of other plant in service is provided primarily on a straight-line basis over estimated useful lives, which for Southern Company range up to 65 years and for Southern Company Gas range from five to 15 years for transportation equipment, 40 to 60 years for storage facilities, and up to 65 years for other assets. At December 31, 2019 and 2018, accumulated depreciation for other plant in service totaled $732 million and $766 million, respectively, for Southern Company and $155 million and $129 million, respectively, for Southern Company Gas.
Southern Power
Southern Power applies component depreciation, where depreciation is computed principally by the straight-line method over the estimated useful life of the asset. Certain of Southern Power's generation assets related to natural gas-fired facilities are depreciated on a units-of-production basis, using hours or starts, to better match outage and maintenance costs to the usage of, and revenues from, these assets. The primary assets in Southern Power's property, plant, and equipment are generating facilities, which generally have estimated useful lives as follows:
Southern Power Generating FacilityUseful life
Natural gasUp to 45 years
Biomass(*)
Up to 40 years
SolarUp to 35 years
WindUp to 30 years

(*)
See Note 15 under "Southern PowerSales of Natural Gas and Biomass Plants" for information on Southern Power's sale of its biomass facility on June 13, 2019.
Southern Power reviews its estimated useful lives and salvage values on an ongoing basis. The results of these reviews could result in changes which could have a material impact on Southern Power's net income in the near term.
When Southern Power's depreciable property, plant, and equipment is retired, or otherwise disposed of in the normal course of business, the applicable cost and accumulated depreciation is removed and a gain or loss is recognized in the statements of income.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Joint Ownership Agreements
At December 31, 2019, the Registrants' percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation were as follows:
Facility (Type)
Percent
Ownership
 Plant in Service 
Accumulated
Depreciation
 CWIP
   (in millions)
Alabama Power       
Greene County (natural gas) Units 1 and 260.0%
(a) 
$182
 $71
 $1
Plant Miller (coal) Units 1 and 291.8
(b) 
2,058
 630
 65
        
Georgia Power       
Plant Hatch (nuclear)50.1%
(c) 
$1,316
 $603
 $40
Plant Vogtle (nuclear) Units 1 and 245.7
(c) 
3,565
 2,177
 96
Plant Scherer (coal) Units 1 and 28.4
(c) 
266
 94
 14
Plant Scherer (coal) Unit 375.0
(c) 
1,267
 492
 47
Plant Wansley (coal)53.5
(c) 
1,059
 367
 10
Rocky Mountain (pumped storage)25.4
(d) 
182
 139
 
        
Mississippi Power       
Greene County (natural gas) Units 1 and 240.0%
(a) 
$118
 $46
 $1
Plant Daniel (coal) Units 1 and 250.0
(e) 
750
 214
 11
        
Southern Company Gas       
Dalton Pipeline (natural gas pipeline)50.0%
(f) 
$271
 $10
 $
(a)Jointly owned by Alabama Power and Mississippi Power and operated and maintained by Alabama Power.
(b)Jointly owned with PowerSouth and operated and maintained by Alabama Power.
(c)Georgia Power owns undivided interests in Plants Hatch, Vogtle Units 1 and 2, Scherer, and Wansley in varying amounts jointly with one or more of the following entities: OPC, MEAG Power, Dalton, Florida Power & Light Company, JEA, and Gulf Power. Georgia Power has been contracted to operate and maintain the plants as agent for the co-owners and is jointly and severally liable for third party claims related to these plants.
(d)Jointly owned with OPC, which is the operator of the plant.
(e)
Jointly owned by Gulf Power and Mississippi Power. In accordance with the operating agreement, Mississippi Power acts as Gulf Power's agent with respect to the operation and maintenance of these units. See Note 3 under "Other MattersMississippi Power" for information regarding a commitment between Mississippi Power and Gulf Power to seek a restructuring of their 50% undivided ownership interests in Plant Daniel.
(f)Jointly owned with The Williams Companies, Inc., The Dalton Pipeline is a 115-mile natural gas pipeline that serves as an extension of the Transco natural gas pipeline system into northwest Georgia. Southern Company Gas leases its 50% undivided ownership for approximately $26 million annually for an initial term through 2042. The lessee is responsible for maintaining the pipeline during the lease term and for providing service to transportation customers under its FERC-regulated tariff.
Georgia Power also owns 45.7% of Plant Vogtle Units 3 and 4, which are currently under construction and had a CWIP balance of $5.8 billion at December 31, 2019. See Note 2 under "Georgia PowerNuclear Construction" for additional information.
The Registrants' proportionate share of their jointly-owned facility operating expenses is included in the corresponding operating expenses in the statements of income and each Registrant is responsible for providing its own financing.
Assets Subject to Lien
In October 2018, the Mississippi PSC approved executed agreements between Mississippi Power and its largest retail customer, Chevron Products Company (Chevron), for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets, with a lease receivable balance of $118 million at December 31, 2019, located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato to a subsidiary of Xcel. As of December 31, 2019, under the terms of the PPA and the expansion PPA for Plant Mankato, approximately $547 million of assets, primarily related to property, plant, and equipment, were subject to lien. See Note 15 under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
See Note 8 under "Secured Debt" for information regarding debt secured by certain assets of Georgia Power, Mississippi Power, and Southern Company Gas.
6. ASSET RETIREMENT OBLIGATIONS
AROs are computed as the present value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. Each traditional electric operating company and natural gas distribution utility has received accounting guidance from its state PSC or applicable state regulatory agency allowing the continued accrual or recovery of other retirement costs for long-lived assets that it does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as regulatory liabilities and amounts to be recovered are reflected in the balance sheets as regulatory assets.
The ARO liabilities for the traditional electric operating companies primarily relate to facilities that are subject to the CCR Rule and the related state rules, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of nuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2). See "Nuclear Decommissioning" herein for additional information. The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and, for Mississippi Power, mine reclamation and water wells. The ARO liability for Southern Power primarily relates to Southern Power's solar and wind facilities, which are located on long-term land leases requiring the restoration of land at the end of the lease.
The traditional electric operating companies and Southern Company Gas also have identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these assets have not been recorded because the settlement timing for certain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
Southern Company and the traditional electric operating companies will continue to recognize in their respective statements of income allowed removal costs in accordance with regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability in the balance sheets as ordered by the various state PSCs.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the AROs included in the balance sheets are as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi Power
Southern Power(*)
 (in millions)
Balance at December 31, 2017$4,824
$1,709
$2,638
$174
$78
Liabilities incurred29

27

2
Liabilities settled(244)(55)(116)(35)
Accretion217
106
94
5
4
Cash flow revisions4,737
1,450
3,186
16

Reclassification to held for sale(169)



Balance at December 31, 2018$9,394
$3,210
$5,829
$160
$84
Liabilities incurred37

35
1
1
Liabilities settled(328)(127)(151)(35)
Accretion402
145
243
7
4
Cash flow revisions281
312
(172)57

Balance at December 31, 2019$9,786
$3,540
$5,784
$190
$89

(*)Included in other deferred credits and liabilities on Southern Power's consolidated balance sheets.
In June 2018, Alabama Power recorded an increase of approximately $1.2 billion to its AROs related to the CCR Rule. Mississippi Power also recorded an increase of approximately $11 million to its AROs related to an ash pond at Plant Greene County, which is jointly-owned with Alabama Power. The revised cost estimates were based on information from feasibility studies performed on ash ponds in use at plants operated by Alabama Power, including Plant Greene County. During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology.
Also in June 2018, Alabama Power completed an updated decommissioning cost site study for Plant Farley. The estimated cost of decommissioning based on the study resulted in an increase in Alabama Power's ARO liability of approximately $300 million. In December 2018, Georgia Power completed updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. The estimated cost of decommissioning based on the studies resulted in an increase in Georgia Power's ARO liability of approximately $130 million. See "Nuclear Decommissioning" below for additional information.
In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. During the second half of 2018, Georgia Power completed a strategic assessment related to its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. This assessment included engineering and constructability studies related to design assumptions for ash pond closures and advanced engineering methods. The results indicated that additional closure costs will be required to close these ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. These factors also impact the estimated timing of future cash outlays.
The 2018 reclassification of a portion of the ARO liability to liabilities held for sale by Southern Company represents the AROs related to Gulf Power. See Note 15 under "Southern Company" and "Assets Held for Sale" for additional information.
During 2019, Alabama Power recorded increases totaling approximately $312 million to its AROs primarily related to the CCR Rule and the related state rule based on management's completion of closure designs during the second and third quarters 2019 under the planned closure-in-place methodology for all but one of its ash pond facilities. During 2019, Mississippi Power recorded an increase of approximately $57 million to its AROs related to the CCR Rule, primarily associated with the ash pond facility at Plant Greene County, which is jointly owned with Alabama Power. The additional estimated costs to close these ash ponds under the planned closure-in-place methodology primarily relate to cost inputs from contractor bids, internal drainage and dewatering system designs, and increases in the estimated ash volumes. Alabama Power anticipates increasing the ARO for its remaining ash pond facility within the next nine months upon completion of a feasibility study and the related cost estimate, and the increase could be material.
During the second half of 2019, Georgia Power completed an assessment of its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. Cost estimates were revised to reflect further refined costs for

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

closure plans and updates to the timing of future cash outlays. As a result, in December 2019, Georgia Power recorded a decrease of approximately $174 million to its AROs related to the CCR Rule and the related state rule.
The cost estimates for AROs related to the CCR Rule and related state rules are based on information at December 31, 2019 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule and related state requirements for closure. The traditional electric operating companies expect to continue to update their cost estimates and ARO liabilities periodically as additional information related to these assumptions becomes available. Additionally, the closure designs and plans in the States of Alabama and Georgia are subject to approval by environmental regulatory agencies. Absent continued recovery of ARO costs through regulated rates, Southern Company's and the traditional electric operating companies' results of operations, cash flows, and financial condition could be materially impacted. The ultimate outcome of this matter cannot be determined at this time.
Nuclear Decommissioning
The NRC requires licensees of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. Alabama Power and Georgia Power have external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and state PSCs, as well as the IRS. While Alabama Power and Georgia Power are allowed to prescribe an overall investment policy to the Funds' managers, neither Southern Company nor its subsidiaries or affiliates are allowed to engage in the day-to-day management of the Funds or to mandate individual investment decisions. Day-to-day management of the investments in the Funds is delegated to unrelated third-party managers with oversight by the management of Alabama Power and Georgia Power. The Funds' managers are authorized, within certain investment guidelines, to actively buy and sell securities at their own discretion in order to maximize the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
Alabama Power and Georgia Power record the investment securities held in the Funds at fair value, as disclosed in Note 13, as management believes that fair value best represents the nature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value adjustments and realized gains and losses are determined on a specific identification basis.
The Funds at Georgia Power participate in a securities lending program through the managers of the Funds. Under this program, Georgia Power's Funds' investment securities are loaned to institutional investors for a fee. Securities loaned are fully collateralized by cash, letters of credit, and/or securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. At December 31, 2019 and 2018, approximately $28 million and $27 million, respectively, of the fair market value of Georgia Power's Funds' securities were on loan and pledged to creditors under the Funds' managers' securities lending program. The fair value of the collateral received was approximately $29 million and $28 million at December 31, 2019 and 2018, respectively, and can only be sold by the borrower upon the return of the loaned securities. The collateral received is treated as a non-cash item in the statements of cash flows.
Investment securities in the Funds for December 31, 2019 and 2018 were as follows:
 Southern Company
Alabama
Power
Georgia
Power
 (in millions)
At December 31, 2019:   
Equity securities$1,159
$743
$416
Debt securities798
218
580
Other securities77
60
17
Total investment securities in the Funds$2,034
$1,021
$1,013
    
At December 31, 2018:   
Equity securities$919
$594
$325
Debt securities726
201
525
Other securities74
51
23
Total investment securities in the Funds$1,719
$846
$873

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

These amounts exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases. For Southern Company and Georgia Power, these amounts include Georgia Power's investment securities pledged to creditors and collateral received and excludes payables related to Georgia Power's securities lending program.
The fair value increases (decreases) of the Funds, including unrealized gains (losses) and reinvested interest and dividends and excluding the Funds' expenses, for 2019, 2018, and 2017 are shown in the table below.
 Southern Company
Alabama
Power
Georgia
Power
 (in millions)
Fair value increases (decreases)   
2019$344
$194
$150
2018(67)(38)(29)
2017233
125
108
    
Unrealized gains (losses)   
At December 31, 2019$259
$149
$110
At December 31, 2018(183)(96)(87)
At December 31, 2017181
98
83
The investment securities held in the Funds continue to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.
For Alabama Power, approximately $16 million and $17 million at December 31, 2019 and 2018, respectively, previously recorded in internal reserves is being transferred into the Funds through 2040 as approved by the Alabama PSC. The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. Alabama Power and Georgia Power have filed plans with the NRC designed to ensure that, over time, the deposits and earnings of the Funds will provide the minimum funding amounts prescribed by the NRC.
At December 31, 2019 and 2018, the accumulated provisions for the external decommissioning trust funds were as follows:
 2019 2018
 (in millions)
Alabama Power   
Plant Farley$1,021
 $846
    
Georgia Power   
Plant Hatch$634
 $547
Plant Vogtle Units 1 and 2379
 326
Total$1,013
 $873

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Site study cost is the estimate to decommission a specific facility as of the site study year. The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may vary from these estimates because of changes in the assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates. The estimated costs of decommissioning at December 31, 2019 based on the most current studies, which were each performed in 2018, were as follows:
 
Plant
Farley
 
Plant
 Hatch(*)
 
Plant Vogtle
 Units 1 and 2(*)
Decommissioning periods:     
Beginning year2037
 2034
 2047
Completion year2076
 2075
 2079
 (in millions)
Site study costs:     
Radiated structures$1,234
 $734
 $601
Spent fuel management387
 172
 162
Non-radiated structures99
 56
 79
Total site study costs$1,720
 $962
 $842
(*)Based on Georgia Power's ownership interests.
For ratemaking purposes, Alabama Power's decommissioning costs are based on the site study and Georgia Power's decommissioning costs are based on the NRC generic estimate to decommission the radioactive portion of the facilities and the site study estimate for spent fuel management as of 2018. Significant assumptions used to determine these costs for ratemaking were an estimated inflation rate of 4.5% and 2.75% for Alabama Power and Georgia Power, respectively, and an estimated trust earnings rate of 7.0% and 4.75% for Alabama Power and Georgia Power, respectively.
Amounts previously contributed to the Funds for Plant Farley are currently projected to be adequate to meet the decommissioning obligations. Alabama Power will continue to provide site-specific estimates of the decommissioning costs and related projections of funds in the external trust to the Alabama PSC and, if necessary, would seek the Alabama PSC's approval to address any changes in a manner consistent with NRC and other applicable requirements.
Under the 2013 ARP, Georgia Power's annual decommissioning cost for ratemaking was a total of $5 million for Plant Hatch and Plant Vogtle Units 1 and 2. Effective January 1, 2020, in connection with the 2019 ARP, this total annual amount was reduced to $4 million. See Note 2 under "Georgia PowerRate Plans2019 ARP" for additional information.
7. CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS
The Registrants may hold ownership interests in a number of business ventures with varying ownership structures. Partnership interests and other variable interests are evaluated to determine if each entity is a VIE. If a venture is a VIE for which a Registrant is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. The Registrants reassess the conclusion as to whether an entity is a VIE upon certain occurrences, which are deemed reconsideration events.
For entities that are not determined to be VIEs, the Registrants evaluate whether they have control or significant influence over the investee to determine the appropriate consolidation and presentation. Generally, entities under the control of a Registrant are consolidated, and entities over which a Registrant can exert significant influence, but which a Registrant does not control, are accounted for under the equity method of accounting. However, the Registrants may also invest in partnerships and limited liability companies that maintain separate ownership accounts. All such investments are required to be accounted for under the equity method unless the interest is so minor that there is virtually no influence over operating and financial policies, as are all investments in joint ventures.
Investments accounted for under the equity method are recorded within equity investments in unconsolidated subsidiaries in the balance sheets and, for Southern Company and Southern Company Gas, the equity income is recorded within earnings from equity method investments in the statements of income. See "SEGCO" and "Southern Company Gas" herein for additional information.
SEGCO
Alabama Power and Georgia Power own equally all of the outstanding capital stock of SEGCO, which owns electric generating units with a total rated capacity of 1,020 MWs, as well as associated transmission facilities. Alabama Power and Georgia Power

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

account for SEGCO using the equity method; Southern Company consolidates SEGCO. The capacity of these units is sold equally to Alabama Power and Georgia Power. Alabama Power and Georgia Power make payments sufficient to provide for the operating expenses, taxes, interest expense, and a ROE. The share of purchased power included in purchased power, affiliates in the statements of income totaled $93 million in 2019, $102 million in 2018, and $76 million in 2017 for Alabama Power and $95 million in 2019, $105 million in 2018, and $78 million in 2017 for Georgia Power.
SEGCO paid $14 million of dividends in 2019, $18 million in 2018, and $24 million in 2017, of which one-half of each was paid to each of Alabama Power and Georgia Power. In addition, Alabama Power and Georgia Power each recognize 50% of SEGCO's net income.
Alabama Power, which owns and operates a generating unit adjacent to the SEGCO generating units, has a joint ownership agreement with SEGCO for the ownership of an associated gas pipeline. Alabama Power owns 14% of the pipeline with the remaining 86% owned by SEGCO.
See Note 3 under "Guarantees" for additional information regarding guarantees of Alabama Power and Georgia Power related to SEGCO.
Southern Power
Variable Interest Entities
Southern Power has certain subsidiaries that are determined to be VIEs. The CompanySouthern Power is considered the primary beneficiary of these VIEs because it controls the most significant activities of the VIEs, including operating and maintaining the respective assets, and has the obligation to absorb expected losses of these VIEs to the extent of its equity interests.
SP Solar and SP Wind
2. ACQUISITIONSIn May 2018, Southern Power sold a noncontrolling 33% limited partnership interest in SP Solar to Global Atlantic Financial Group Limited (Global Atlantic). See Note 15 under "Southern Power" for additional information. A wholly-owned subsidiary of Southern Power is the general partner and holds a 1% ownership interest in SP Solar and another wholly-owned subsidiary of Southern Power owns the remaining 66% ownership in SP Solar. SP Solar qualifies as a VIE since the arrangement is structured as a limited partnership and the 33% limited partner does not have substantive kick-out rights against the general partner.
During 2016At December 31, 2019 and 2015,2018, SP Solar had total assets of $6.4 billion and $6.3 billion, respectively, total liabilities of $381 million and $113 million, respectively, and noncontrolling interests of $1.1 billion and $1.2 billion, respectively. Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with its overall growth strategy, the Company or one of its wholly-owned subsidiaries, SRP and SRE, acquired or contracted to acquire the projects discussed below. Also, on March 29, 2016, the Company acquired an additional 15%their partnership interest in Desert Stateline, 51% of which was initially acquired in August 2015. As a result, the Company and the class B member are now entitled to 66% and 34%, respectively, of all cash distributions from Desert Stateline. In addition, the Company will continue to be entitled to substantially all of the federal tax benefits with respect to the transaction. Acquisition-related costs were expensed as incurred and were not material for any of the years presented.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The following table presents the Company's acquisitions during and subsequent to the year ended December 31, 2016.
Project FacilityResourceSeller; Acquisition Date
Approximate Nameplate Capacity (MW)
 LocationPercentage OwnershipActual/Expected CODPPA Contract Period
Acquisitions During the Year Ended December 31, 2016
Boulder 1SolarSunPower
November 16, 2016
100 Clark County, NV51%(a)December 201620 years
CalipatriaSolarSolar Frontier Americas Holding LLC
February 11, 2016
20 Imperial County, CA90%(b)February 201620 years
East PecosSolarFirst Solar, Inc.
March 4, 2016
120 Pecos County, TX100% March 201715 years
Grant PlainsWindApex Clean Energy Holdings, LLC
August 26, 2016
147 Grant County, OK100% December 2016
20 years and 12 years (c)
Grant WindWindApex Clean Energy Holdings, LLC
April 7, 2016
151 Grant County, OK100% April 201620 years
HenriettaSolarSunPower
July 1, 2016
102 Kings County, CA51%(a)July 201620 years
LamesaSolarRES America Developments Inc.
July 1, 2016
102 Dawson County, TX100% Second quarter 201715 years
Mankato (d)
Natural GasCalpine Corporation October 26, 2016375 Mankato, MN100% 
N/A (e)
10 years
PassadumkeagWindQuantum Utility Generation, LLC
June 30, 2016
42 Penobscot County, ME100% July 201615 years
RutherfordSolarCypress Creek Renewables, LLC
July 1, 2016
74 Rutherford County, NC90%(b)December 201615 years
Salt ForkWindEDF Renewable Energy, Inc.
December 1, 2016
174 Donley and Gray Counties, TX100% December 201614 years and 12 years
Tyler BluffWindEDF Renewable Energy, Inc.
December 21, 2016
125 Cooke County, TX100% December 201612 years
Wake WindWindInvenergy
October 26, 2016
257 Floyd and Crosby Counties, TX90.1%(f)October 201612 years
Acquisitions Subsequent to December 31, 2016
BethelWindInvenergy
January 6, 2017
276 Castro County, TX100% January 201712 years
(a)The Company owns 100% of the class A membership interests and a wholly-owned subsidiary of the seller owns 100% of the class B membership interests. The Company and the class B member are entitled to 51% and 49%, respectively, of all cash distributions from the project. In addition, the Company is entitled to substantially all of the federal tax benefits with respect to the transaction.
(b)The Company owns 90%, with the minority owner, TRE, owning 10%.
(c)In addition to the 20-year and 12-year PPAs, the facility has a 10-year contract with Allianz Risk Transfer (Bermuda) Ltd.
(d)Under the terms of the remaining 10-year PPA and the 20-year expansion PPA, approximately $408 million of assets, primarily related to property, plant, and equipment, are subject to lien at December 31, 2016.
(e)The acquisition included a fully operational 375-MW natural gas-fired combined-cycle facility.
(f)The Company owns 90.1%, with the minority owner, Invenergy, owning 9.9%.
Acquisitions During the Year Ended December 31, 2016
The Company's aggregate purchase price for acquisitions during the year ended December 31, 2016 was approximately $2.3 billion. Including the minority owner TRE's 10% ownership interest in Calipatria and Rutherford, SunPower's 49% ownership interest in Boulder 1 and Henrietta, along with the assumption of $217 million in construction debt (non-recourse to the Company), and Invenergy's 9.9% ownership interest in Wake Wind, the total aggregate purchase price is approximately $2.6 billion for the project facilities acquired during the year ended December 31, 2016. The allocations of the purchase price to

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

individual assets have not been finalized, except for Calipatria, East Pecos, Lamesa, and Rutherford, which were finalized with no changes to amounts originally reported. The fair values of the assets and liabilities acquired through the business combinations were recorded as follows:
 2016
 (in millions)
CWIP$2,354
Property, plant, and equipment302
Intangible assets (a)
128
Other assets52
Accounts payable(16)
Debt(217)
Total purchase price$2,603
  
Funded by: 
The Company (b) (c)
$2,345
Noncontrolling interests (d) (e)
258
Total purchase price$2,603
(a)Intangible assets consist of acquired PPAs that will be amortized over 10 and 20-year terms. The estimated amortization for future periods is approximately $9 million per year. See Note 1 for additional information.
(b)At December 31, 2016, $461 million is included in acquisitions payable on the consolidated balance sheets.
(c)Includes approximately $281 million of contingent consideration, of which $67 million remains payable at December 31, 2016.
(d)Includes approximately $51 million of non-cash contributions recorded as capital contributions from noncontrolling interests in the consolidated statements of stockholders' equity.
(e)
Includes approximately $142 million of contingent consideration, all of which had been paid at December 31, 2016 by the noncontrolling interests.
The aggregate amount of revenue recognized by the Company related to the acquisitions during 2016, included in the consolidated statement of income for 2016, is $37 million. The amount of net income, excluding impacts of ITCs and PTCs, attributable to the Company related to the acquisitions during 2016 included in the consolidated statement of income is immaterial.
The solar and wind acquisitions did not have operating revenues or net income prior to the completion of construction and the generating facility being placed in service; therefore, supplemental pro forma information as if these acquisitions occurred as of the beginning of 2016, and for the comparable 2015 year, is not meaningful and has been omitted. However, the Mankato acquisition is an operating facility and unaudited supplemental pro forma information, as though the acquisition occurred as of the beginning of 2016 and for the comparable 2015 year, is as follows:
 20162015
 (in millions)
Revenues$40
$39
Net income$14
$11
These unaudited pro forma results are for comparative purposes only and may not be indicative of the results that would have occurred had this acquisition been completed on January 1, 2015 or the results that may be attained in the future.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The following table presents the Company's acquisitions for the year ended December 31, 2015. During the year ended December 31, 2016, the fair values of assets and liabilities acquired for all projects listed below were finalized with no changes to amounts originally reported.
Project FacilityResourceSeller; Acquisition Date
Approximate
Nameplate Capacity (
MW)
 LocationPercentage OwnershipActual CODPPA
Contract Period
Acquisitions for the Year Ended December 31, 2015
Desert StatelineSolarFirst Solar
August 31, 2015
299 (a)

San Bernardino County, CA51%(b)From December 2015 to July 201620 years
Garland and Garland ASolarRecurrent
December 17, 2015
205 Kern County, CA51%(b)October and August 201615 years and 20 years
Kay WindWindApex Clean Energy Holdings, LLC December 11, 2015299 Kay County, OK100% December 201520 years
Lost Hills BlackwellSolarFirst Solar
April 15, 2015
33 Kern County, CA51%(b)April 201529 years
MorelosSolarSolar Frontier Americas Holding, LLC
October 22, 2015
15 Kern County, CA90%(c)November 201520 years
North StarSolarFirst Solar
April 30, 2015
61 Fresno County, CA51%(b)June 201520 years
RoserockSolarRecurrent November 23, 2015160 Pecos County, TX51%(b)November 201620 years
TranquillitySolarRecurrent
August 28, 2015
205 Fresno County, CA51%(b)July 201618 years
(a)The facility has a total of 299 MWs, of which 110 MWs were placed in service in the fourth quarter 2015 and the remainder by July 2016.
(b)The Company owns 100% of the class A membership interests and a wholly-owned subsidiary of the seller owns 100% of the class B membership interests. The Company and the class B member are entitled to 51% and 49%, respectively, of all cash distributions from the project. In addition, the Company is entitled to substantially all of the federal tax benefits with respect to the transaction.
(c)The Company owns 90%, with the minority owner, TRE, owning 10%.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Acquisitions During the Year Ended December 31, 2015
The Company's aggregate purchase price for the project facilities acquired during the year ended December 31, 2015 was approximately $1.4 billion. Including the minority owner TRE's 10% ownership interest in Morelos, First Solar's 49% ownership interest in Desert Stateline, Lost Hills Blackwell, and North Star, and Recurrent's 49% ownership interest in Garland, Garland A, Roserock, and Tranquillity, the total aggregate purchase price was approximately $1.9 billion for the project facilities acquired during the year ended December 31, 2015.
The fair values of the assets and liabilities acquired through the business combinations were recorded as follows:
 2015
 (in millions)
CWIP$1,367
Property, plant, and equipment315
Intangible assets (a)
274
Other assets64
Accounts payable(89)
Total purchase price$1,931
  
Funded by: 
The Company (b)
$1,440
Noncontrolling interests (c) (d)
491
Total purchase price$1,931
(a)Intangible assets consist of acquired PPAs that will be amortized over 20-year terms. The estimated amortization for future periods is approximately $14 million per year. See Note 1 under "Impairment of Long-Lived Assets and Intangibles" for additional information.
(b)Includes approximately $195 million of contingent consideration, all of which had been paid at December 31, 2016.
(c)Includes approximately $227 million of non-cash contributions recorded as capital contributions from noncontrolling interests in the consolidated statements of stockholders' equity.
(d)Includes approximately $76 million of contingent consideration, all of which had been paid at December 31, 2016 by the noncontrolling interests.
Construction Projects
Construction Projects Completed
During 2016, in accordance with its overall growth strategy, the Company completed construction of, and placed in service, the projects set forth in the table below. Total costs of construction incurred for these projects were $3.2 billion.
Solar FacilitySeller
Approximate Nameplate Capacity (MW)
LocationActual CODPPA Contract Period
ButlerCERSM, LLC and Community Energy, Inc.103Taylor County, GADecember 2016
30 years (a)
Butler Solar FarmStrata Solar Development, LLC22Taylor County, GAFebruary 2016
20 years (a)
Desert StatelineFirst Solar Development, LLC
299 (b)
San Bernardino County, CAFrom December 2015 to July 201620 years
GarlandRecurrent185Kern County, CAOctober 201615 years
Garland ARecurrent20Kern County, CAAugust 201620 years
PawpawLongview Solar, LLC30Taylor County, GAMarch 201630 years
Roserock (c)
Recurrent160Pecos County, TXNovember 201620 years
SandhillsN/A146Taylor County, GAOctober 201625 years
TranquillityRecurrent205Fresno County, CAJuly 201618 years
(a)Affiliate PPA approved by the FERC.
(b)The facility has a total of 299 MWs, of which 110 MWs were placed in service in the fourth quarter 2015 and the remainder by July 2016.
(c)Prior to placing the Roserock facility in service, certain solar panels were damaged. While the facility is currently generating energy as expected, the Company is pursuing remedies under its insurance policies and other contracts to repair or replace these solar panels.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Construction Projects in Progress
At December 31, 2016, the Company continued construction of the East Pecos and Lamesa solar facilities that were acquired in 2016. In addition, as part of the Company's acquisition of Mankato in 2016, the Company commenced construction of an additional 345-MW expansion, which is fully contracted under a new 20-year PPA. Total aggregate construction costs, excluding the acquisition costs, are expected to be $530 million to $590 million for East Pecos, Lamesa, and Mankato. At December 31, 2016, the construction costs totaled $386 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
The following table presents the Company's construction projects in progress as of December 31, 2016:
Project FacilityResource
Approximate Nameplate Capacity (MW)
LocationActual/Expected CODPPA Contract Period
East PecosSolar120Pecos County, TXMarch 201715 years
LamesaSolar102Dawson County, TXSecond quarter 201715 years
MankatoNatural Gas345Mankato, MNSecond quarter 201920 years
Development Projects
In December 2016, as part of the Company's renewable development strategy, SRP entered into a joint development agreement with Renewable Energy Systems Americas, Inc. to develop and construct approximately 3,000 MWs across 10 wind projects expected to be placed in service between 2018 and 2020. Also in December 2016, the Company signed agreements and made payments to purchase wind turbine equipment from Siemens Wind Power, Inc. and Vestas-American Wind Technology, Inc. to be used for construction of the facilities. Once these wind projects reach commercial operations, they are expected to qualify for 100% PTCs. The ultimate outcome of these matters cannot be determined at this time.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
The Company is subject to certain claims and legal actions arising in the ordinary course of business. In addition, the Company's business activities are subject to extensive governmental regulation related to public health and the environment. Litigation over environmental issues and claims of various types, including property damage, personal injury, common law nuisance, and citizen enforcement of environmental requirements such as air quality and water standards, has occurred throughout the U.S. This litigation has included claims for damages alleged to have been caused by CO2 and other emissions and alleged exposure to hazardous materials, and/or requests for injunctive relief in connection with such matters. The ultimate outcome of such pending or potential litigation against the Company and its subsidiaries cannot be predicted at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.
FERC Matters
The Company and certain of its generation subsidiaries are subject to regulation by the FERC. The Company has authority from the FERC to sell electricity at market-based rates. Since 2008, that authority, for certain balancing authority areas, has been conditioned on compliance with the requirements of an energy auction, which the FERC found to be tailored mitigation that addresses potential market power concerns. In accordance with FERC regulations governing such authority, the traditional electric operating companies and the Company filed a triennial market power analysis in 2014, which included continued reliance on the energy auction as tailored mitigation. In April 2015, the FERC issued an order finding that the traditional electric operating companies' and the Company's existing tailored mitigation may not effectively mitigate the potential to exert market power in certain areas served by the traditional electric operating companies and in some adjacent areas. The FERC directed the traditional electric operating companies and the Company to show why market-based rate authority should not be revoked in these areas or to provide a mitigation plan to further address market power concerns. The traditional electric operating companies and the Company filed a request for rehearing in May 2015 and in June 2015 filed their response with the FERC.
On December 9, 2016, the traditional electric operating companies and the Company filed an amendment to their market-based rate tariff that proposed certain changes to the energy auction, as well as several non-tariff changes. On February 2, 2017, the FERC issued an order accepting all such changes subject to an additional condition of cost-based price caps for certain sales outside of the energy auction, finding that all of these changes would provide adequate alternative mitigation for the traditional electric operating companies' and the Company's potential to exert market power in certain areas served by the traditional electric

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

operating companies and in some adjacent areas. The traditional electric operating companies and the Company expect to make a compliance filing within 30 days accepting the terms of the order. While the FERC's February 2, 2017 order references the market power proceeding discussed above, it remains a separate, ongoing matter.
The ultimate outcome of these matters cannot be determined at this time.
4. JOINT OWNERSHIP AGREEMENTS
The Company is a 65% owner of Plant Stanton A, a natural gas-fired combined-cycle unit with a nameplate capacity of 659 MWs. The unit is co-owned by the Orlando Utilities Commission (28%), the Florida Municipal Power Agency (3.5%), and the Kissimmee Utility Authority (3.5%). The Company has a service agreement with SCS whereby SCS is responsible for the operation and maintenance of Plant Stanton A. As of December 31, 2016, $155 million was recorded in plant in service with associated accumulated depreciation of $58 million. These amounts represent the Company's share of total plant assets and each owner is responsible for providing its own financing. The Company's proportionate share of Plant Stanton A's operating expense is included in the corresponding operating expenses in the consolidated statements of income.
5. INCOME TAXES
On behalf of the Company, Southern Company files a consolidated federal income tax return and various state income tax returns, some of which are combined, unitary, or consolidated. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
Current and Deferred Income Taxes
Details of income tax provisions are as follows:
 2016 2015 2014
 (in millions)
Federal —     
Current (*)
$928
 $12
 $179
Deferred (*)
(1,098) 10
 (166)
 (170) 22
 13
State —     
Current(60) (32) (14)
Deferred35
 31
 (2)
 (25) (1) (16)
Total$(195) $21
 $(3)
(*)ITCs and PTCs generated in the current tax year and carried forward from prior tax years that cannot be utilized in the current tax year are reclassified from current to deferred taxes in federal income tax expense above. ITCs and PTCs reclassified in this manner include $1.13 billion for 2016, $246 million for 2015, and $305 million for 2014. These ITCs and PTCs are included in the following table of temporary differences as unrealized tax credits.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 20162015
  
Deferred tax liabilities —  
Accelerated depreciation and other property basis differences$2,440
$1,364
Levelized capacity revenues28
22
Other27
7
Total deferred income tax liabilities2,495
1,393
Deferred tax assets —  
Federal effect of state deferred taxes53
40
Basis difference on ITCs292
149
Alternative minimum tax carryforward15
15
Unrealized tax credits1,685
551
Federal net operating loss (NOL)808
9
Deferred state tax assets60
13
Other partnership basis differences16
3
Other8
14
Total deferred income tax assets2,937
794
Valuation Allowance
(2)
Net deferred income tax assets2,937
792
Total deferred income tax asset (liability)$442
$(601)
   
Recognized in the consolidated balance sheets:  
Accumulated deferred income taxes – assets$594
$
Accumulated deferred income taxes – liability$(152)$(601)
Deferred tax liabilities are primarily the result of property-related timing differences. The application of bonus depreciation provisions in current tax law significantly increased deferred tax liabilities related to accelerated depreciation.
Deferred tax assets consist primarily of timing differences related to the carryforward of unrealized federal ITCs, PTCs, net operating loss, and net basis differences on federal ITCs.
Tax Credit Carryforwards
At December 31, 2016, the Company had federal ITC and PTC carryforwards, which are expected to result in $1.7 billion of federal income tax benefits. The federal ITC carryforwards begin expiring in 2032 but are expected to be fully utilized by 2022. The PTC carryforwards begin expiring in 2036 but are expected to be fully utilized by 2022. The acquisition of additional renewable projects and carrying back the federal NOL, as well as potential tax reform legislation, could further delay the utilization of existing tax credit carryforwards. The ultimate outcome of these matters cannot be determined at this time.
Net Operating Loss
Southern Company is expecting a consolidated federal net operating loss of approximately $2.8 billion for income tax purposes for the 2016 tax year. Portions of the NOL are expected to be carried back to prior tax years and forward to future tax years. The ultimate outcome of this matter cannot be determined at this time.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The Company had state NOL carryforwards of $1.0 billion and $225 million at December 31, 2016 and December 31, 2015, respectively, which will expire from 2029 to 2035. These carryforwards resulted in deferred tax assets of $40 million as of December 31, 2016 and $8 million as of December 31, 2015. The state NOL carryforwards by jurisdiction were as follows:
JurisdictionNOL CarryforwardsNet State Income Tax BenefitTax Year NOL Expires
 (in millions) 
Oklahoma$838
$32
2035
Florida185
7
2033
Other states7
1
2029 through 2035
Balance at year end$1,030
$40
 
Effective Tax Rate
A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 2016 2015 2014
Federal statutory rate35.0 % 35.0 % 35.0 %
State income tax, net of federal deduction(9.1) (0.3) (6.0)
Amortization of ITC(20.6) (5.0) (4.3)
ITC basis difference(89.0) (21.5) (27.7)
Production tax credits(23.3) (0.6) 
Noncontrolling interests(6.2) (1.7) (0.3)
Other4.6
 2.5
 1.4
Effective income tax rate (benefit)(108.6)% 8.4 % (1.9)%
The Company's effective tax rate decreased in 2016 and increased in 2015 primarily due to changes in federal ITCs.
The Company's deferred federal ITCs are amortized to income tax expense over the life of the respective asset. ITCs amortized in this manner amounted to $37 million in 2016, $19 million in 2015, and $11 million in 2014. Also, the Company received cash related to federal ITCs under the renewable energy incentives of $162 million and $74 million for the years ended December 31, 2015 and 2014, respectively. No cash was received related to these incentives in 2016. Furthermore, the tax basis of the asset is reduced by 50% of the ITCs received, resulting in a net deferred tax asset. The Company has elected to recognize the tax benefit of this basis difference as a reduction to income tax expense in the year in which the plant reaches commercial operation. The tax benefit of the related basis differences reduced income tax expense by $173 million in 2016, $54 million in 2015, and $48 million in 2014. The tax benefit of PTCs reduced income tax expense by $42 million in 2016 and $1 million in 2015. See "Unrecognized Tax Benefits" below for further information.
Unrecognized Tax Benefits
Changes during the year in unrecognized tax benefits were as follows:
 2016 2015 2014
 (in millions)
Balance at beginning of year$8
 $5
 $2
Tax positions increase from current periods17
 9
 5
Tax positions decrease from prior periods(8) (6) (2)
Balance at end of year$17
 $8
 $5
The increase in unrecognized tax benefits from current periods for 2016, 2015, and 2014, and the decrease from prior periods in 2016 and 2015, primarily relate to federal income tax benefits from deferred ITCs and would all impact the Company's effective tax rate, if recognized. The impact on the effective tax rate is determined based on the amount of ITCs which are uncertain. If these tax positions are not able to be recognized due to a federal audit adjustment in the amount that has been estimated, the amount of tax credit carryforwards discussed above would be reduced by approximately $92 million.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The Company classifies interest on tax uncertainties as interest expense. Accrued interest for unrecognized tax benefits was immaterial for all periods presented. The Company did not accrue any penalties on uncertain tax positions.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. The settlement of federal and state audits could impact the balances. At this time, an estimate of the range of reasonably possible outcomes cannot be determined.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2012. Southern Company has filed its 2013, 2014, and 2015 federal income tax returns and has received partial acceptance letters from the IRS; however, the IRS has not finalized its audits. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for the Company's state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2011.
6. FINANCING
Southern Power Company's senior notes, bank term loans, commercial paper, and credit facility are unsecured senior indebtedness, which rank equally with all other unsecured and unsubordinated debt of Southern Power Company. The Company's subsidiaries are not issuers, borrowers, or obligors, as applicable, under the senior notes, bank term loans, commercial paper, or the Facility (as defined herein). The senior notes, bank term loans, commercial paper, and the Facility are effectively subordinated to any future secured debt and any potential claims of creditors of the Company's subsidiaries. As of December 31, 2016, the Company had no secured debt other than indebtedness outstanding under the subsidiary project credit facilities discussed below.
Securities Due Within One Year
At December 31, 2016, the Company had a $60 million bank loan and $500 million of senior notes due within one year. At December 31, 2015, the Company had a $400 million bank loan due within one year. In addition, the Company classified as due within one year approximately $1 million and $3 million of long-term notes payable to TRE at December 31, 2016 and 2015, respectively.
Maturities of long-term debt are as follows:
 December 31, 2016
 (in millions)
2017$561
2018670
2019600
2020300
2021300
Senior Notes
In June 2016, the Company issued €600 million aggregate principal amount of Series 2016A 1.00% Senior Notes due June 20, 2022 and €500 million aggregate principal amount of Series 2016B 1.85% Senior Notes due June 20, 2026. The net proceeds are being allocated to renewable energy generation projects. The Company's obligations under its euro-denominated fixed-rate notes were effectively converted to fixed-rate U.S. dollars at issuance through foreign currency swaps, mitigating foreign currency exchange rate risk associated with the interest and principal payments. See Note 9 under "Foreign Currency Derivatives" for additional information.
In September 2016, the Company issued $290 million aggregate principal amount of Series 2016C 2.75% Senior Notes due September 20, 2023. The proceeds were used for general corporate purposes, including the Company's growth strategy and continuous construction program, as well as repayment of amounts outstanding under the subsidiary project credit facilities, discussed below.
In November 2016, the Company issued $600 million aggregate principal amount of Series 2016D 1.95% Senior Notes due December 15, 2019, $300 million aggregate principal amount of Series 2016E 2.50% Senior Notes due December 15, 2021, and $400 million aggregate principal amount of Series 2016F 4.95% Senior Notes due December 15, 2046. The net proceeds of the Series 2016D and the Series 2016E Senior Notes are being allocated to renewable energy generation projects. The proceeds of the Series 2016F Senior Notes were used to redeem, in December 2016, all of the $200 million aggregate principal amount of the Company's Series E 6.375% Senior Notes due November 15, 2036 and to repay outstanding short-term indebtedness.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

At December 31, 2016 and 2015, the Company had $5.3 billion and $2.7 billion of senior notes outstanding, respectively, which included senior notes due within one year.
Other Long-Term Notes
During 2016, the Company repaid $6 million and issued $5 million of long-term notes payable to TRE due 2035 through 2036 related to the financing of Calipatria, Morelos, and Rutherford. At December 31, 2016 and 2015, the Company had $15 million and $13 million, respectively, of long-term notes payable to TRE.
In September 2016, the Company repaid $80 million of an outstanding $400 million floating rate bank term loan and extended the maturity date of the remaining $320 million from September 2016 to September 2018. In addition, the Company entered into a $60 million aggregate principal amount floating rate bank term loan bearing interest based on one-month LIBOR due September 2017, which is included in securities due within one year on the consolidated balance sheets. The proceeds were used to repay existing indebtedness and for other general corporate purposes.
Each of these bank term loan agreements has a covenant that limits debt levels to 65% of total capitalization, as defined by the agreements. For purposes of this definition, debt excludes any project debt incurred by certain subsidiaries of the Company to the extent such debt is non-recourse to the Company, and capitalization excludes the capital stock or other equity attributable to such subsidiary. At December 31, 2016, the Company was in compliance with its debt limits.
Asset Subject to Lien
During 2016, in accordance with its overall growth strategy, the Company acquired the Mankato project.percentage. Under the terms of the remaining 10-year PPAlimited partnership agreement, distributions without limited partner consent are limited to available cash and SP Solar is obligated to distribute all such available cash to its partners each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves.
In December 2018, Southern Power sold a noncontrolling tax-equity interest in SP Wind to 3 financial investors. SP Wind owns 8 operating wind farms. See Note 15 under "Southern Power" for additional information. Southern Power owns 100% of the Class B membership interests and the 20-year expansion PPA, approximately $4083 financial investors own 100% of the Class A membership interests. SP Wind qualifies as a VIE since the structure of the arrangement is similar to a limited partnership and the Class A members do not have substantive kick-out rights against Southern Power.
At December 31, 2019 and 2018, SP Wind had total assets of $2.5 billion and $2.5 billion, respectively, total liabilities of $128 million and $51 million, respectively, and noncontrolling interests of $45 million and $47 million, respectively. Under the terms of the limited liability agreement, distributions without Class A member consent are limited to available cash and SP Wind is obligated to distribute all such available cash to its members each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves. Cash distributions from SP Wind are generally allocated 60% to Southern Power and 40% to the 3 financial investors in accordance with the limited liability agreement.
Southern Power consolidates both SP Solar and SP Wind, as the primary beneficiary, since it controls the most significant activities of each entity, including operating and maintaining their assets. Certain transfers and sales of the assets primarily related to property, plant, and equipment,in the VIEs are subject to lien atpartner consent and the liabilities are non-recourse to the general credit of Southern Power. Liabilities consist of customary working capital items and do not include any long-term debt.
Other Variable Interest Entities
Southern Power has other consolidated VIEs that relate to certain subsidiaries that have either sold noncontrolling interests to tax-equity investors or acquired less than a 100% interest from facility developers. These entities are considered VIEs because the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

arrangements are structured similar to a limited partnership and the noncontrolling members do not have substantive kick-out rights.
At December 31, 2016.2019 and 2018, the other VIEs had total assets of $1.1 billion and $858 million, respectively, total liabilities of $104 million and $80 million, respectively, and noncontrolling interests of $409 million and $241 million, respectively. Under the terms of the partnership agreements, distributions of all available cash are required each month or quarter and additional distributions require partner consent.
In August 2019, Southern Power completed the acquisition of a majority interest in DSGP and gained control of its most significant activities. As a result, Southern Power became the primary beneficiary of this VIE and began accounting for it as a consolidated entity. Upon consolidation of DSGP, Southern Power recorded an additional $107 million in assets, $51 million in liabilities, and $56 million in noncontrolling interest. There was 0 cash transferred as a result of this consolidation. From the date of Southern Power's first investment in June 2019 until gaining control in August 2019, Southern Power applied the equity method of accounting. See Note 215 under "Southern Power" for additional information.
Bank Credit Arrangements
Company Credit FacilitiesEquity Method Investments
At December 31, 2016, the Company had a committed credit facility (Facility) of $600 million expiring in 2020. Proceeds from the Facility may be used for working capital and general corporate purposes as well as liquidity support for the Company's commercial paper program. As of December 31, 2016, the total amount available under the Facility was $522 million. As of December 31, 2015, the total amount available under the Facility was $566 million. The amounts outstanding as of December 31, 2016 and 2015 reflect $78 million and $34 million in letters of credit, respectively. The Facility does not contain a material adverse change clause at the time of borrowing. Subject to applicable market conditions, the Company expects to renew or replace the Facility, as needed, prior to expiration. In connection therewith, the Company may extend the maturity date and/or increase or decrease the lending commitment thereunder.
The Company is required to pay a commitment fee on the unused balance of the Facility. This fee is less than 1/4 of 1%. The Facility contains a covenant that limits the ratio of debt to capitalization (each as defined in the Facility) to a maximum of 65%. For purposes of this definition, debt excludes any project debt incurred by certain subsidiaries of the Company to the extent such debt is non-recourse to the Company, and capitalization excludes the capital stock or other equity attributable to such subsidiary. At December 31, 2016, the Company was in compliance with its debt limits.
In December 2016, the Company entered into an agreement for a $120 million continuing letter of credit facility for standby letters of credit expiring in 2019. At December 31, 2016, the total amount available under the facility was $82 million. The Company's subsidiaries are not parties to the facility.
Commercial Paper Program
The Company's commercial paper program is used to finance acquisition and construction costs related to electric generating facilities and for general corporate purposes. There was no commercial paper outstanding as of December 31, 2016 and 2015.

NOTES (continued)
2019, Southern Power Companyhad equity method investments in several wind and Subsidiary Companies 2016 Annual Reportbattery storage projects totaling $28 million.

Subsidiary Project Credit Facilities
In connection with the construction of solar facilities by RE Tranquillity LLC, RE Roserock LLC, and RE Garland Holdings LLC, indirect subsidiaries of the Company, each subsidiary entered into separate credit agreements (Project Credit Facilities), which were non-recourse to the Company (other than the subsidiary party to the agreement). Each Project Credit Facility provided (a) a senior secured construction loan credit facility, (b) a senior secured bridge loan facility, and (c) a senior secured letter of credit facility that was secured by the membership interests of the respective project company, with proceeds directed to finance project costs related to the respective solar facilities. Each Project Credit Facility was secured by the assets of the applicable project subsidiary and membership interests of the applicable project subsidiary. The Tranquillity and Garland Project Credit Facilities were fully repaid on October 14, 2016 and December 29, 2016, respectively. The table below summarizes the Roserock Project Credit Facility as of December 31, 2016, which was extended to and fully repaid on January 31, 2017.
Project  Construction Loan Facility Bridge Loan Facility Total Loan Facility Loan Facility Undrawn Letter of Credit Facility Letter of Credit Facility Undrawn
   (in millions)
Roserock  $63
 $180
 $243
 $34
 $23
 $16
The Project Credit Facilities had total amounts outstanding of $209 million and $137 million, at a weighted average interest rate of 2.1% and 2.0%, as of December 31, 2016 and 2015, respectively.
Dividend Restrictions
The Company can only pay dividends to Southern Company out of retained earnings or paid-in-capital.
7. COMMITMENTS
Fuel Agreements
SCS, as agent for the Company and the traditional electric operating companies, has entered into various fuel transportation and procurement agreements to supply a portion of the fuel (primarily natural gas) requirements for the operating facilities which are not recognized on the Company's consolidated balance sheets. In 2016, 2015, and 2014, the Company incurred fuel expense of $456 million, $441 million, and $596 million, respectively, the majority of which was purchased under long-term commitments. The Company expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the Company and Southern Company's traditional electric operating companies. Under these agreements, each of the traditional electric operating companies and the Company may be jointly and severally liable. Southern Company has entered into keep-well agreements with each of the traditional electric operating companies to ensure they will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of the Company as a contracting party under these agreements.
Operating Leases
The Company has operating lease agreements with various terms and expiration dates. Total rent expense was $22 million, $7 million, and $4 million for 2016, 2015, and 2014, respectively. These amounts include contingent rent expense related to land leases based on escalation in the Consumer Price Index for All Urban Consumers. The Company includes step rents, escalations, lease concessions, and lease extensions in its computation of minimum lease payments, which are recognized on a straight-line basis over the minimum lease term. As of December 31, 2016, estimated minimum lease payments under operating leases were $18 million in 2017, $19 million in 2018, $20 million in each of 2019, 2020, and 2021, and $762 million in 2022 and thereafter. The majority of the committed future expenditures are related to land leases for solar and wind facilities.
Redeemable Noncontrolling Interests
See Note 10.
8. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement.
Level 1 consists of observable market data in an active market for identical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of the Company of what a market participant would use in pricing an asset or liability. If there is little available market data, then the Company's own assumptions are the best available information.
In the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.
As of December 31, 2016, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2016:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Energy-related derivatives$
 $21
 $
 $21
Interest rate derivatives
 1
 
 1
Cash equivalents628
 
 
 628
Total$628
 $22
 $
 $650
Liabilities:       
Energy-related derivatives$
 $5
 $
 $5
Foreign currency derivatives
 58
 
 58
Contingent consideration
 
 18
 18
Total$
 $63
 $18
 $81
As of December 31, 2015, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs  
As of December 31, 2015:(Level 1) (Level 2) (Level 3) Total
 (in millions)
Assets:       
Energy-related derivatives$
 $4
 $
 $4
Interest rate derivatives
 3
 
 3
Cash equivalents511
 
 
 511
Total$511
 $7
 $
 $518
Liabilities:       
Energy-related derivatives$
 $3
 $
 $3
Valuation Methodologies
The energy-related derivatives primarily consist of over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard over-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and occasionally, implied volatility of interest rate options. The fair value of cross-currency swaps reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future foreign currency exchange rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and discount rates. The interest rate derivatives and cross-currency swaps are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 9 for additional information on how these derivatives are used.
The Company has contingent payment obligations related to certain acquisitions whereby the Company is obligated to pay generation-based payments to the seller over a 10-year period beginning at the commercial operation date. The obligation is categorized as Level 3 under Fair Value Measurements as the fair value is determined using significant unobservable inputs for the forecasted facility generation in MW-hours, as well as other inputs such as a fixed dollar amount per MW-hour, and a discount rate, and is evaluated periodically. The fair value of contingent consideration reflects the net present value of expected payments and any change arising from forecasted generation is expected to be immaterial.
As of December 31, 2016 and 2015, other financial instruments for which the carrying amount did not equal fair value were as follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt, including securities due within one year:   
2016$5,628
 $5,691
2015$3,122
 $3,117
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates available to the Company.
9. DERIVATIVES
The Company is exposed to market risks, primarily commodity price risk and interest rate risk, and occasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the Company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company's policy is that derivatives are to be used primarily for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the consolidated balance sheets as either assets or liabilities and are presented on a net basis. See Note 8 for additional information. In the statements of cash flows, the cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities. The cash impacts of settled foreign currency derivatives are classified as operating or financing activities to correspond with classification of the hedged interest or principal, respectively. See Note 1 under "Financial Instruments" for additional information.
Energy-Related Derivatives
The Company enters into energy-related derivatives to hedge exposures to electricity, gas, and other fuel price changes. The Company has limited exposure to market volatility in energy-related commodity prices because its long-term sales contracts shift substantially all fuel cost responsibility to the purchaser. However, the Company has been and may continue to be exposed to market volatility in energy-related commodity prices as a result of uncontracted generating capacity.
Energy-related derivative contracts are accounted for under one of two methods:
Cash Flow Hedges – Gains and losses on energy-related derivatives designated as cash flow hedges which are used to hedge anticipated purchases and sales and are initially deferred in OCI before being recognized in the consolidated statements of income in the same period as the hedged transactions are reflected in earnings.
Not Designated – Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the consolidated statements of income as incurred.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric industry. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
At December 31, 2016, the net volume of energy-related derivative contracts for natural gas positions totaled 27 million mmBtu, all of which expire in 2017, which is the longest hedge date. At December 31, 2016, the net volume of energy-related derivative contracts for power positions was 6.1 million MWs, all of which expire in 2017, which is the longest hedge date.
In addition to the volume discussed above, the Company enters into physical natural gas supply contracts that provide the option to sell back excess gas due to operational constraints. The maximum expected volume of natural gas subject to such a feature is 3 million mmBtu.
For cash flow hedges, the amounts expected to be reclassified from accumulated OCI to earnings for the next 12-month period ending December 31, 2017 is $14 million.
Interest Rate Derivatives
The Company may also enter into interest rate derivatives to hedge exposure to changes in interest rates. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time the hedged transactions affect earnings. The derivatives employed as hedging instruments are structured to minimize ineffectiveness, which is recorded directly to earnings. Fair value gains or losses on derivatives that are not designated or fail to qualify as hedges are recognized in the consolidated statements of income as incurred.
At December 31, 2016, the following interest rate derivatives were outstanding:
 Notional
Amount
 Interest
Rate
Received
 Weighted Average Interest
Rate Paid
 Hedge
Maturity
Date
 Fair Value
Gain (Loss)
December 31,
2016
 (in millions)       (in millions)
Derivatives not Designated as Hedges$47
(a.b)3-month LIBOR 2.21% January 2017(c)$1
(a)Swaption at RE Roserock LLC.
(b)Amortizing notional amount.
(c)Represents the mandatory settlement date. Settlement amount was based on a 15-year amortizing swap.
The Company does not have any deferred gains and losses in AOCI related to past cash flow hedges that are expected to be amortized into earnings through 2017. As such, the Company does not expect any pre-tax gains (losses) to be reclassified from AOCI to interest expense for the 12-month period ending December 31, 2017.
Foreign Currency Derivatives
The Company may also enter into foreign currency derivatives to hedge exposure to changes in foreign currency exchange rates, such as that arising from the issuance of debt denominated in a currency other than U.S. dollars. Derivatives related to forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses is recorded in OCI and is reclassified into earnings at the same time that the hedged transactions affect earnings, including foreign currency gains or losses arising from changes in the U.S. currency exchange rates. Any ineffectiveness is recorded directly to earnings. The derivatives employed as hedging instruments are structured to minimize ineffectiveness.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

At December 31, 2016, the following foreign currency derivatives were outstanding:
 Pay NotionalPay RateReceive NotionalReceive RateHedge
Maturity Date
Fair Value
Gain (Loss) at December 31, 2016
 (in millions) (in millions)  (in millions)
Cash Flow Hedges of Existing Debt     

$677
2.95%600
1.00%June 2022$(34)

564
3.78%500
1.85%June 2026(24)
Total$1,241
 1,100
  $(58)
The estimated pre-tax gains (losses) that will be reclassified from accumulated OCI to earnings for the next 12-month period ending December 31, 2017 total $(25) million.
Derivative Financial Statement Presentation and Amounts
The Company enters into energy-related and interest rate derivative contracts that may contain provisions that permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. At December 31, 2016, fair value amounts of derivative assets and liabilities on the consolidated balance sheets are presented net to the extent that there are netting arrangements or similar agreements with counterparties. At December 31, 2015, the fair value amounts of derivative instruments were presented gross on the consolidated balance sheets.
At December 31, 2016 and 2015, the fair value of energy-related, interest rate, and foreign currency derivatives reflected in the consolidated balance sheets is as follows:
 2016 2015
Derivative Category and Balance Sheet LocationAssetsLiabilities AssetsLiabilities
 (in millions)
Derivatives designated as hedging instruments in cash flow and fair value hedges     
Energy-related derivatives:     
Other current assets/Other current liabilities$18
$4
 $3
$2
Foreign currency derivatives:     
Other current assets/Other current liabilities
25
 

Other deferred charges and assets/Other deferred credits and liabilities
33
 

Total derivatives designated as hedging instruments in cash flow and fair value hedges$18
$62
 $3
$2
Derivatives not designated as hedging instruments     
Energy-related derivatives:     
Other current assets/Other current liabilities$3
$1
 $1
$1
Interest rate derivatives:     
Other current assets/Other current liabilities1

 3

Total derivatives not designated as hedging instruments$4
$1
 $4
$1
Gross amounts of recognized assets and liabilities$22
$63
 $7
$3
Gross amounts offset$(5)$(5) $(1)$(1)
Net amounts of assets and liabilities (*)
$17
$58
 $6
$2
(*)At December 31, 2015, the fair value amounts for derivative contracts subject to netting arrangements were presented gross on the consolidated balance sheet.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

For the years ended December 31, 2016, 2015, and 2014, the pre-tax effects of energy-related, interest rate, and foreign currency derivatives designated as cash flow hedging instruments on the consolidated statements of income were as follows:
Derivatives in Cash Flow Hedging Relationships
Gain (Loss) Recognized in OCI on Derivative
(Effective Portion)
 
Gain (Loss) Reclassified from AOCI into Income
(Effective Portion)
Derivative Category201620152014 Statements of Income Location201620152014
 (in millions)  (in millions)
Energy-related derivatives$14
$
$
 Amortization$2
$
$
Interest rate derivatives


 Interest expense, net of amounts capitalized(1)(1)(1)
Foreign currency derivatives(58)

 Interest expense, net of amounts capitalized(13)

     Other income (expense), net(82)

Total$(44)$
$
  $(94)$(1)$(1)
There was no material ineffectiveness recorded in earnings for any period presented.
The pre-tax effects of energy-related derivatives and interest rate derivatives not designated as hedging instruments on the Company's consolidated statements of income were not material for any year presented.
Contingent Features
The Company does not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of various credit rating changes of certain affiliated companies. At December 31, 2016, there was no collateral posted with the Company's derivative counterparties.
At December 31, 2016, the fair value of derivative liabilities with contingent features, including certain agreements that could require collateral in the event that one or more Southern Company system power pool participants has a credit rating change to below investment grade because of joint and several liability features underlying these derivatives, was immaterial.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company only enters into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. The Company has also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk. Therefore, the Company does not anticipate a material adverse effect on the financial statements as a result of counterparty nonperformance.
10. NONCONTROLLING INTERESTS
TRE can require the Company to purchase its redeemable noncontrolling interests in STR, which owns various solar facilities contracted under long-term PPAs, at fair market value pursuant to the partnership agreement, and SunPower can require the Company to purchase its redeemable noncontrolling interest at fair market value until April 30, 2017. As of December 31, 2016, the carrying amounts of STR's and SunPower's noncontrolling interests were $50 million and $114 million, respectively.

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

The following table presents the changes in redeemable noncontrolling interests for the years ended December 31:
 2016 2015 2014
   (in millions)  
Beginning balance$43
 $39
 $29
Net income attributable to redeemable noncontrolling interests4
 2
 4
Distributions to redeemable noncontrolling interests(1) 
 (1)
Capital contributions from redeemable noncontrolling interests118
 2
 7
Ending balance$164
 $43
 $39
The following table presents the attribution of net income (loss) to the Company and the noncontrolling interests for the years ended December 31:
 2016 2015 2014
 (in millions)
Net income$374
 $229
 $175
Less: Net income (loss) attributable to noncontrolling interests32
 12
 (1)
Less: Net income attributable to redeemable noncontrolling interests4
 2
 4
Net income attributable to the Company$338
 $215
 $172

NOTES (continued)
Southern Power Company and Subsidiary Companies 2016 Annual Report

11. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Summarized quarterly financial information for 2016 and 2015 is as follows:
Quarter Ended
Operating
Revenues
 
Operating
Income
 
Net Income
Attributable to
the Company
 (in millions)
March 2016$315
 $47
 $50
June 2016373
 81
 89
September 2016500
 134
 176
December 2016389
 28
 23
      
March 2015$348
 $67
 $33
June 2015337
 75
 46
September 2015401
 129
 102
December 2015304
 55
 34
The Company's business is influenced by seasonal weather conditions.


SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2012-2016
Southern Power Company and Subsidiary Companies 2016 Annual Report
 2016
 2015
 2014
 2013
 2012
Operating Revenues (in millions):         
Wholesale — non-affiliates$1,146
 $964
 $1,116
 $923
 $754
Wholesale — affiliates419
 417
 383
 346
 425
Total revenues from sales of electricity1,565
 1,381
 1,499
 1,269
 1,179
Other revenues12
 9
 2
 6
 7
Total$1,577
 $1,390
 $1,501
 $1,275
 $1,186
Net Income Attributable to
   Southern Power (in millions)
$338
 $215
 $172
 $166
 $175
Cash Dividends
   on Common Stock (in millions)
$272
 $131
 $131
 $129
 $127
Return on Average Common Equity (percent)9.79
 10.16
 10.39
 10.73
 11.72
Total Assets (in millions)(a)(b)
$15,169
 $8,905
 $5,233
 $4,417
 $3,771
Property, Plant, and Equipment
   In Service (in millions)
$12,728
 $7,275
 $5,657
 $4,696
 $4,060
Capitalization (in millions):         
Common stock equity$4,430
 $2,483
 $1,752
 $1,564
 $1,522
Redeemable noncontrolling interests164
 43
 39
 29
 8
Noncontrolling interests1,245
 781
 219
 
 
Long-term debt(a)
5,068
 2,719
 1,085
 1,607
 1,297
Total (excluding amounts due within one year)$10,907
 $6,026
 $3,095
 $3,200
 $2,827
Capitalization Ratios (percent):         
Common stock equity40.6
 41.2
 56.6
 48.9
 53.8
Redeemable noncontrolling interests1.5
 0.7
 1.3
 0.9
 0.3
Noncontrolling interests11.4
 13.0
 7.1
 
 
Long-term debt(a)
46.5
 45.1
 35.0
 50.2
 45.9
Total (excluding amounts due within one year)100.0
 100.0
 100.0
 100.0
 100.0
Kilowatt-Hour Sales (in millions):         
Wholesale — non-affiliates23,213
 18,544
 19,014
 15,111
 15,637
Wholesale — affiliates15,950
 16,567
 11,194
 9,359
 16,373
Total39,163
 35,111
 30,208
 24,470
 32,010
Plant Nameplate Capacity
   Ratings (year-end) (megawatts)(c)
12,442
 9,808
 9,185
 8,924
 8,764
Maximum Peak-Hour Demand (megawatts):         
Winter3,469
 3,923
 3,999
 2,685
 3,018
Summer4,303
 4,249
 3,998
 3,271
 3,641
Annual Load Factor (percent)50.0
 49.0
 51.8
 54.2
 48.6
Plant Availability (percent)91.6
 93.1
 91.8
 91.8
 92.9
Source of Energy Supply (percent):         
Natural gas79.4
 89.5
 86.0
 88.5
 91.0
Solar, Wind, and Biomass12.1
 4.3
 2.9
 1.1
 0.5
Purchased power —         
From non-affiliates6.8
 4.7
 6.4
 6.4
 7.2
From affiliates1.7
 1.5
 4.7
 4.0
 1.3
Total100.0
 100.0
 100.0
 100.0
 100.0
(a)A reclassification of debt issuance costs from Total Assets to Long-term debt of $11 million, $12 million, and $9 million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(b)A reclassification of deferred tax assets from Total Assets of $306 million, $- million, and $- million is reflected for years 2014, 2013, and 2012, respectively, in accordance with new accounting standards adopted in 2015 and applied retrospectively.
(c)Plant nameplate capacity ratings include 100% of all solar facilities. When taking into consideration the Company's 90% equity interest in STR and SRP's various equity interests in its subsidiaries, the Company's equity portion of total nameplate capacity for 2016 is 11,768 MW.

SOUTHERN COMPANY GAS
FINANCIAL SECTION


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Company Gas and Subsidiary Companies 2016 Annual Report
The management of Southern Company Gas (the Company) is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of the Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company's internal control over financial reporting was effective as of December 31, 2016.
/s/ Andrew W. Evans
Andrew W. Evans
Chairman, President, and Chief Executive Officer
/s/ Elizabeth W. Reese
Elizabeth W. Reese
Executive Vice President, Chief Financial Officer, and Treasurer
February 21, 2017

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Southern Company Gas

We have audited the accompanying consolidated balance sheet of Southern Company Gas and Subsidiary Companies (formerly known as AGL Resources Inc.) (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 (Successor), and the related consolidated statements of income, comprehensive income, stockholders' equity, and cash flows for the six month periods ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor). These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audit. We did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), the Company's investment in which is accounted for by the use of the equity method. The accompanying consolidated financial statements of the Company include its equity investment in SNG of $1,394 million as of December 31, 2016, and its earnings from its equity method investment in SNG of $56 million for the six month period ended December 31, 2016. Those statements were audited by other auditors whose report (which expresses an unqualified opinion on SNG's financial statements and contains an emphasis of matter paragraph concerning the extent of its operations and relationships with affiliated entities) has been furnished to us, and our opinion, insofar as it relates to the amounts included for SNG, is based solely on the report of the other auditors.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit and the report of the other auditors provide a reasonable basis for our opinion.

In our opinion, based on our audit and the report of the other auditors, such consolidated financial statements (pages II-586 to II-643) present fairly, in all material respects, the financial position of Southern Company Gas and Subsidiary Companies as of December 31, 2016, and the results of their operations and their cash flows for the six-month periods ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor), in conformity with accounting principles generally accepted in the United States of America.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Southern Company Gas

In our opinion, the consolidated balance sheet as of December 31, 2015 and the related consolidated statements of income, comprehensive income, common stockholders' equity, and cash flows for each of the two years in the period ended December 31, 2015 present fairly, in all material respects, the financial position of Southern Company Gas (formerly AGL Resources Inc.) and its subsidiaries as of December 31, 2015, and the results of their operations and their cash flows for each of the two years in the period ended December 31, 2015, in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule for each of the two years in the period ended December 31, 2015 presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. These financial statements and financial statement schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and the financial statement schedule based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.


/s/ PricewaterhouseCoopers LLP
Atlanta, Georgia
February 11, 2016

DEFINITIONS
TermMeaning
AFUDCAllowance for funds used during construction
ASCAccounting Standards Codification
Atlanta Gas LightAtlanta Gas Light Company
Atlantic Coast PipelineAtlantic Coast Pipeline, LLC
Chattanooga GasChattanooga Gas Company
Chicago HubA venture of Nicor Gas, which provides natural gas storage and transmission-related services to marketers and gas distribution companies
CUBCitizens Utility Board, in Illinois
Dalton PipelineA 50% undivided ownership interest in a pipeline facility in Georgia
EPAU.S. Environmental Protection Agency
FASBFinancial Accounting Standards Board
FERCFederal Energy Regulatory Commission
FitchFitch Ratings, Inc.
Florida PSCFlorida Public Service Commission, the state regulatory agency for Florida City Gas
GAAPU.S. generally accepted accounting principles
Georgia PSCGeorgia Public Service Commission, the state regulatory agency for Atlanta Gas Light
Heating Degree DaysA measure of weather, calculated when the average daily temperatures are less than 65 degrees Fahrenheit
Heating SeasonThe period from November through March when natural gas usage and operating revenues are generally higher
Horizon PipelineHorizon Pipeline Company, LLC
Illinois CommissionIllinois Commerce Commission, the state regulatory agency for Nicor Gas
IRSInternal Revenue Service
ITCInvestment tax credit
LIFOLast-in, first-out
LNGLiquefied natural gas
LOCOMLower of weighted average cost or current market price
MarketersMarketers selling retail natural gas in Georgia and certificated by the Georgia PSC
MergerThe merger of AMS Corp., a wholly-owned, direct subsidiary of Southern Company, with and into Southern Company Gas, effective July 1, 2016, with Southern Company Gas continuing as the surviving corporation and a wholly-owned, direct subsidiary of Southern Company
MGPManufactured gas plant
mmBtuMillion British thermal units
Moody'sMoody's Investors Service, Inc.
natural gas distribution utilitiesSouthern Company Gas' seven natural gas distribution utilities (Nicor Gas, Atlanta Gas Light, Virginia Natural Gas, Elizabethtown Gas, Florida City Gas, Chattanooga Gas, and Elkton Gas)
New Jersey BPUNew Jersey Board of Public Utilities, the state regulatory agency for Elizabethtown Gas
NicorNicor Inc. - former holding company of Nicor Gas
Nicor GasNorthern Illinois Gas Company, doing business as Nicor Gas Company
Nicor Gas Credit Facility$700 million credit facility entered into by Nicor Gas to support its commercial paper program
NYMEXNew York Mercantile Exchange, Inc.
OCIOther comprehensive income

DEFINITIONS
(continued)
TermMeaning
Pad gasVolumes of non-working natural gas used to maintain the operational integrity of the natural gas storage facility
PennEast PipelinePennEast Pipeline Company, LLC
PiedmontPiedmont Natural Gas Company, Inc.
Pivotal Utility HoldingsPivotal Utility Holdings, Inc., doing business as Elizabethtown Gas, Elkton Gas, and Florida City Gas
PRPPipeline Replacement Program, Atlanta Gas Light's 15-year infrastructure replacement program, which ended in December 2013
PSCPublic Service Commission
ROEReturn on equity
S&PS&P Global Ratings, a division of S&P Global Inc.
SCSSouthern Company Services, Inc. (the Southern Company system service company)
SECU.S. Securities and Exchange Commission
SequentSequent Energy Management, L.P.
SNGSouthern Natural Gas Company, L.L.C.
Southern CompanyThe Southern Company
Southern Company Gas CapitalSouthern Company Gas Capital Corporation (formerly known as AGL Capital Corporation), a 100%-owned subsidiary of Southern Company Gas
Southern Company Gas Credit Facility$1.3 billion credit agreement entered into by Southern Company Gas Capital to support its commercial paper program
Southern Company systemSouthern Company, the traditional electric operating companies, Southern Power, Southern Company Gas (as of July 1, 2016), Southern Electric Generating Company, Southern Nuclear, SCS, Southern LINC, PowerSecure, Inc. (as of May 9, 2016), and other subsidiaries
Southern LINCSouthern Communications Services, Inc.
Southern NuclearSouthern Nuclear Operating Company, Inc.
Southern PowerSouthern Power Company and its subsidiaries
SouthStarSouthStar Energy Services, LLC
STRIDEAtlanta Gas Light's Strategic Infrastructure Development and Enhancement program
traditional electric operating companiesAlabama Power Company, Georgia Power Company, Gulf Power Company, and Mississippi Power Company
TritonTriton Container Investments, LLC
Tropical ShippingTropical Shipping and Construction Company Limited, which was sold in 2014
VIEVariable interest entity
Virginia CommissionVirginia State Corporation Commission, the state regulatory agency for Virginia Natural Gas
Virginia Natural GasVirginia Natural Gas, Inc.
WACOGWeighted average cost of gas

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Southern Company Gas and Subsidiary Companies 2016 Annual Report
OVERVIEW
Business Activities
Southern Company Gas (formerly known as AGL Resources Inc.) is an energy services holding company whose primary business is the distribution of natural gas in seven states – Illinois, Georgia, Virginia, New Jersey, Florida, Tennessee, and Maryland – through seven utilities. Southern Company Gas and its subsidiaries (the Company) are also involved in several other complementary businesses.
In conjunction with the Merger, the Company changed the names of its reportable segments to better align with its new parent company. The Company has four reportable segments – gas distribution operations (formerly referred to as distribution operations), gas marketing services (formerly referred to as retail operations), wholesale gas services (formerly referred to as wholesale services), and gas midstream operations (formerly referred to as midstream operations) – and one non-reportable segment, all other. See Note 12 to the financial statements for additional information.
Many factors affect the opportunities, challenges, and risks of the Company's business. These factors include the ability to maintain a constructive regulatory environment, to maintain and grow natural gas sales, and to effectively manage and secure timely recovery of costs. The Company has various regulatory mechanisms that operate to address cost recovery. Effectively operating pursuant to these regulatory mechanisms and appropriately balancing required costs and capital expenditures with customer prices will continue to challenge the Company for the foreseeable future.
Merger with Southern Company
On July 1, 2016, the Company completed the Merger, which was accounted for by Southern Company using the acquisition method of accounting whereby the assets acquired and liabilities assumed were recognized at fair value as of the acquisition date. Pushdown accounting was applied to the Company, which created a new cost basis assigned to assets, liabilities, and equity as of the acquisition date. Accordingly, the successor period financial statements reflect a new basis of accounting, and successor and predecessor period financial results (separated by a heavy black line) are presented, but are not comparable. As a result of the application of acquisition accounting, certain discussions herein include disclosure of the predecessor and successor periods.
The Company's results for the successor period of July 1, 2016 through December 31, 2016 include a $20 million pre-tax decrease in earnings that is comprised of reduced revenues and increased amortization expense, partially offset by lower interest expense, all as a result of the fair value adjustments to certain assets and liabilities in the application of acquisition accounting.
For the successor period of July 1, 2016 through December 31, 2016, Merger-related expenses were $41 million. Merger-related expenses were $56 million and $44 million for the predecessor periods of January 1, 2016 through June 30, 2016 and the year ended December 31, 2015, respectively. See RESULTS OF OPERATIONS herein for information related to Merger-related expenses. Also, see Note 11 to the financial statements under "Merger with Southern Company" for additional information relating to the Merger.
Investment in SNG
On September 1, 2016, the Company paid approximately $1.4 billion to acquire a 50% equity interest in SNG, which is the owner of a 7,000-mile pipeline system connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee. The investment in SNG is accounted for using the equity method. The Company recorded equity investment income of $56 million from this investment through December 31, 2016. See Note 4 to the financial statements under "Equity Method Investments – SNG" and Note 11 to the financial statements under "Investment in SNG" for additional information.
Other Matters
On October 3, 2016, the Company completed its purchase of Piedmont's 15% interest in SouthStar for $160 million. See Note 4 to the financial statements under "Variable Interest Entities" for additional information.
Operating Metrics
The Company continues to focus on several operating metrics, including Heating Degree Days, customer count, and volumes of natural gas sold.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Heating Degree Days
The Company measures weather and the effect on its business using Heating Degree Days. Generally, increased Heating Degree Days result in higher demand for natural gas on the Company's distribution system. With the exception of its utilities in Illinois and Florida, the Company has various regulatory mechanisms, such as weather normalization mechanisms, which limit its exposure to weather changes within typical ranges in each of its utilities' respective service territories. However, the utility customers in Illinois and the gas marketing services customers primarily in Georgia can be impacted by warmer- or colder-than-normal weather. The Company utilizes weather hedges at gas distribution operations and gas marketing services to reduce negative earnings impacts in the event of warmer-than-normal weather, while retaining all of the earnings upside in the event of colder-than-normal weather for gas distribution operations in Illinois and most of the earnings upside for gas marketing services.
The following table presents the Heating Degree Days information for Illinois and Georgia.
  Years Ended December 31, 2016 vs. 2015 2015 vs. 2014 2016 vs. normal
  
Normal(a)
 2016 2015 2014 (warmer) (warmer) (warmer)
  (in thousands)      
Illinois(b)
 5,869
 5,243
 5,433
 6,556
 (3)% (17)% (11)%
Georgia 2,618
 2,175
 2,204
 2,882
 (1)% (24)% (17)%
(a)Normal represents the 10-year average from January 1, 2006 through December 31, 2015 for Illinois at Chicago Midway International Airport and for Georgia at Atlanta Hartsfield-Jackson International Airport, based on information obtained from the National Oceanic and Atmospheric Administration, National Climatic Data Center.
(b)The 10-year average Heating Degree Days established by the Illinois Commission in Nicor Gas' last rate case is 5,600 for the 12 months from 1999 through 2008.
In 2016, weather in Illinois was 11% warmer than normal and 3% warmer than in 2015. The Company hedged its exposure to warmer-than-normal weather at Nicor Gas; therefore, the negative pre-tax weather impact on gas distribution operations was limited to $1 million for the successor period of July 1, 2016 through December 31, 2016 and $7 million for the predecessor period of January 1, 2016 through June 30, 2016. Overall, weather in Illinois was warmer than normal during 2015; however, weather in the first quarter 2015 was 10% colder than normal and in the fourth quarter 2015 was 28% warmer than normal. Since the Company hedged its exposure to warmer-than-normal weather, the positive pre-tax weather impact in 2015 on gas distribution operations was $2 million.
In 2016, weather in Georgia was 17% warmer than normal and 1% warmer than 2015. The Company hedged its exposure to warmer-than-normal weather for the first and fourth quarters of 2016 separately. As such, the negative pre-tax weather impact was limited to $4 million for the successor period of July 1, 2016 through December 31, 2016 and there was no weather impact for the predecessor period of January 1, 2016 through June 30, 2016 at gas marketing services.
Customer Count
The number of customers at gas distribution operations and energy customers at gas marketing services can be impacted by natural gas prices, economic conditions, and competition from alternative fuels. The Company's gas marketing services' energy customers are primarily located in Georgia and Illinois. The customer metrics presented in the following table highlight the number of customers to which the Company provided services at the date or for the period indicated.
  December 31,
  
2016(a)
 
2015(b)
 
2014(b)
  (in thousands)
Gas distribution operations 4,586
 4,526
 4,497
Gas marketing services      
Energy customers 656
 645
 628
Market share of energy customers in Georgia 29.6% 29.7% 30.6%
Service contracts 1,198
 1,171
 1,182
(a)Includes customer and contract counts at December 31, 2016.
(b)Includes average customer and contract counts for the years ended December 31, 2015 and 2014.
The Company anticipates overall customer growth trends at gas distribution operations to continue in 2017, as it expects continued improvement in the new housing market and low natural gas prices. The Company uses a variety of targeted marketing programs to attract new customers and to retain existing customers. These efforts include adding residential customers,

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


multifamily complexes, and commercial and industrial customers who use natural gas for purposes other than heating, as well as evaluating and launching new natural gas related programs, products, and services to enhance customer growth, mitigate customer attrition, and increase operating revenues. These programs generally emphasize natural gas as the fuel of choice for customers and seek to expand the use of natural gas through a variety of promotional activities. The Company also targets customer conversions to natural gas from other energy sources, emphasizing the pricing advantage of natural gas. These programs focus on premises that could be connected to the Company's distribution system at little or no cost to the customer. In cases where conversion cost can be a disincentive, the Company may employ rebate programs and other assistance to address customer cost issues.
In 2017, gas marketing services intends to continue efforts to enter into targeted markets and expand energy customers and service contracts.
Volumes of Natural Gas Sold
The Company's natural gas volume metrics for gas distribution operations and gas marketing services, as shown in the following table, illustrate the effects of weather and customer demand for natural gas compared to the two prior years. Wholesale gas services' physical sales volumes represent the daily average natural gas volumes sold to its customers.
  Year Ended December 31, 2016 vs. 2015 2015 vs. 2014
  2016 2015 2014 % Change % Change
Gas distribution operations (mmBtu in millions)
          
Firm 670
 695
 766
 (3.6)% (9.3)%
Interruptible 96
 99
 106
 (3.0)% (6.6)%
Total 766
 794
 872
 (3.5)% (8.9)%
Gas marketing services (mmBtu in millions)
          
Firm:          
Georgia 34
 35
 41
 (2.9)% (14.6)%
Illinois 12
 13
 17
 (7.7)% (23.5)%
Other emerging markets 12
 11
 10
 9.1 % 10.0 %
Interruptible:          
Large commercial and industrial 14
 14
 17
  % (17.6)%
Total 72
 73
 85
 (1.4)% (14.1)%
Wholesale gas services          
Daily physical sales (mmBtu in millions/day)
 7.4
 6.8
 6.3
 8.8 % 7.9 %
Seasonality of Results
During the Heating Season, natural gas usage and operating revenues are generally higher as more customers are connected to the Company's distribution systems and natural gas usage is higher in periods of colder weather. Occasionally in the summer, wholesale gas services' operating revenues are impacted due to peak usage by power generators in response to summer energy demands. Seasonality also affects the comparison of certain balance sheet items across quarters, including receivables, unbilled revenues, natural gas for sale, and notes payable. However, these items are comparable when reviewing the Company's annual results. The Company's base operating expenses, excluding cost of natural gas, bad debt expense, and certain incentive compensation costs, are incurred relatively equally over any given year. Thus, the Company's operating results can vary significantly from quarter to quarter as a result of seasonality, which is illustrated in the table below.
  Percent Generated During Heating Season
  Operating Revenues EBIT Net Income
Successor - July 1, 2016 through December 31, 2016 67.1% 81.5% 96.5%
Predecessor - January 1, 2016 through June 30, 2016 70.0% 107.0% 138.9%
2015 68.1% 77.3% 85.0%
2014 72.6% 79.8% 89.6%

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Earnings
Net income attributable to Southern Company Gas for the successor period of July 1, 2016 through December 31, 2016 was $114 million. While the core operations of the business have not changed significantly since the completion of the Merger, earnings for the successor period included $26 million from the Company's investment in SNG, which was completed on September 1, 2016, offset by $12 million due to the impact of the pushdown of acquisition accounting and $27 million of Merger-related expenses. Net income for the successor period reflected higher revenues from continued investment in infrastructure programs and increased usage and customer growth, partially offset by warmer weather, net of hedging, and lower earnings from wholesale gas services due to mark-to-market losses. See RESULTS OF OPERATIONS herein for information on the Company's financial performance.
Net income attributable to Southern Company Gas for the predecessor period of January 1, 2016 through June 30, 2016 was $131 million, which included $41 million of Merger-related expenses. Net income for the predecessor period reflected higher revenues from continued investment in infrastructure programs, partially offset by warm weather, net of hedging, and low earnings from wholesale gas services due to mark-to-market losses.
Net income attributable to Southern Company Gas for the predecessor year ended December 31, 2015 was $353 million, a decrease of $129 million from 2014 primarily due to lower earnings from wholesale gas services. Net income in 2015 also included $26 million of Merger-related expenses and a $9 million non-cash goodwill impairment charge. The Company also recorded an $80 million loss from discontinued operations in 2014. In 2014, wholesale gas services experienced significantly higher commercial activity, primarily in the first quarter, and reported substantial mark-to-market gains, net of LOCOM adjustments, from price volatility generated by colder-than-normal weather, which increased its revenue.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


RESULTS OF OPERATIONS
Operating Results
Results for the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the year ended December 31, 2015 reflect certain Merger-related expenses, which are not expected to have a continuing impact on the results of operations going forward, and those amounts are discussed in the results of operations below. A condensed income statement for the Company follows:
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
 (in millions)  (in millions)
Operating revenues$1,652
  $1,905
 $3,941
 $5,385
Cost of natural gas613
  755
 1,617
 2,729
Cost of other sales10
  14
 28
 36
Other operations and maintenance482
  454
 928
 939
Depreciation and amortization238
  206
 397
 380
Taxes other than income taxes71
  99
 181
 208
Merger-related expenses41
  56
 44
 
Total operating expenses1,455
  1,584
 3,195
 4,292
Gain on disposition of assets
  
 
 2
Operating income197
  321
 746
 1,095
Interest expense, net of amounts capitalized81
  96
 175
 182
Earnings from equity method investments60
  2
 6
 8
Other income (expense), net14
  5
 9
 9
Earnings before income taxes190
  232
 586
 930
Income taxes76
  87
 213
 350
Income from continuing operations114
  145
 373
 580
Loss from discontinued operations, net of tax
  
 
 80
Net Income114
  145
 373
 500
Less: Net income attributable to noncontrolling interest
  14
 20
 18
Net Income Attributable to Southern Company Gas$114
  $131
 $353
 $482
Operating Revenues
Operating revenues for the successor period of July 1, 2016 through December 31, 2016 were $1.7 billion. For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, operating revenues were $1.9 billion, $3.9 billion, and $5.4 billion, respectively.
Natural gas revenues for the successor period of July 1, 2016 through December 31, 2016 reflect continued infrastructure replacement program investment at gas distribution operations, partially offset by the warm weather, net of hedging, and low revenues from wholesale gas services due to low commercial activity and mark-to-market losses. Natural gas revenues for the successor period reflect fair value adjustments to certain assets and liabilities in the application of acquisition accounting of $8 million and $10 million for gas marketing services and wholesale gas services, respectively.
Natural gas revenues for the predecessor period of January 1, 2016 through June 30, 2016 reflect similar key trends at gas distribution operations as discussed above for the successor period. Natural gas revenues for the predecessor period also reflect mark-to-market losses as a result of changes in natural gas prices, low commercial activity driven by changes in price volatility, and a decrease in the value of transportation and forward commodity derivatives from price movements related to natural gas transportation positions at wholesale gas services.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Natural gas revenues for the predecessor year ended December 31, 2015 represented a decrease of $1.4 billion from 2014 due to lower natural gas prices, lower volumes of natural gas sold to customers due to warmer weather in 2015 compared to extremely cold weather in 2014, and decreased commercial activity at wholesale gas services that experienced unusually high commercial activity in 2014 largely driven by colder weather and high price volatility, which presented opportunities for the transportation and storage portfolio in the Northeast and Midwest.
Cost of Natural Gas
Natural gas costs are the largest expense for the Company. Excluding Atlanta Gas Light, which does not sell natural gas to end-use customers, gas distribution operations charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently incurred natural gas costs are passed through to customers without markup, subject to regulatory review. Gas distribution operations defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period, such that no adjusted operating margin is recognized related to these costs. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred natural gas costs are reflected as regulatory assets and accrued natural gas costs are reflected as regulatory liabilities.
Gas marketing services customers are charged for actual or estimated natural gas consumed. Cost of natural gas includes the cost of fuel and lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, and gains and losses associated with certain derivatives.
Cost of natural gas was $613 million for the successor period of July 1, 2016 through December 31, 2016, which reflected low demand for natural gas driven by warm weather in the fourth quarter 2016.
Cost of natural gas was $755 million for the predecessor period of January 1, 2016 through June 30, 2016, which reflected low demand for natural gas driven by warm weather in the first quarter 2016.
For the predecessor years ended December 31, 2015 and 2014, cost of natural gas was $1.6 billion and $2.7 billion, respectively. The decrease in 2015 of $1.1 billion, or 40.7%, was primarily due to lower demand for natural gas driven by warmer weather in 2015 compared to 2014 as weather in 2014 was extremely cold.
Other Operations and Maintenance Expenses
For the successor period of July 1, 2016 through December 31, 2016, other operations and maintenance expenses were $482 million, which includes labor, outside services related to pipeline compliance and maintenance, and legal services and other professional fees, as well as benefit costs.
For the predecessor period of January 1, 2016 through June 30, 2016, other operations and maintenance expenses were $454 million, consistent with the level of expenses in the corresponding period in 2015.
For the predecessor year ended December 31, 2015, other operations and maintenance expenses were $928 million, a decrease of $11 million compared to 2014. The decrease was primarily due to decreased benefit expense and incentive compensation in 2015 driven by lower earnings, which was partially offset by a $14 million goodwill impairment charge in 2015. See Note 1 to the financial statements for additional information regarding goodwill impairment.
See Note 2 to the financial statements for additional information regarding benefit plans.
Depreciation and Amortization
For the successor period of July 1, 2016 through December 31, 2016, depreciation and amortization was $238 million, including $23 million of additional amortization of intangible assets as a result of fair value adjustments in acquisition accounting, as well as depreciation at gas distribution operations due to continued investment in infrastructure programs and other rate base items.
For the predecessor period of January 1, 2016 through June 30, 2016, depreciation and amortization was $206 million, reflecting depreciation related to additional assets placed in service at gas distribution operations.
For the predecessor year ended December 31, 2015, depreciation and amortization was $397 million, an increase of $17 million, or 4.5%, compared to 2014, primarily due to increased depreciation related to additional assets placed in service at gas distribution operations.
Taxes Other Than Income Taxes
For the successor period of July 1, 2016 through December 31, 2016, taxes other than income taxes were $71 million, which consisted primarily of revenue tax expenses, property taxes, and payroll taxes.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, taxes other than income taxes were $99 million, $181 million, and $208 million, respectively, which consisted primarily of revenue tax expenses, property taxes, and payroll taxes. The decrease in 2015 was partially due to a favorable property tax settlement in 2015.
Merger-Related Expenses
For the successor period of July 1, 2016 through December 31, 2016, Merger-related expenses were $41 million, including $18 million in rate credits provided to the customers of Elizabethtown Gas and Elkton Gas as conditions of the Merger, $20 million for additional compensation-related expenses, and $3 million for financial advisory fees, legal expenses, and other Merger-related costs.
For the predecessor period of January 1, 2016 through June 30, 2016, Merger-related expenses were $56 million, including $31 million for financial advisory fees, legal expenses, and other Merger-related costs and $25 million for additional compensation-related expenses.
For the predecessor year ended December 31, 2015, Merger-related expenses were $44 million, including $20 million for financial advisory fees, legal expenses, and other Merger-related costs and $24 million for additional compensation-related expenses due to remeasurement of performance share units based upon the increase in the Company's stock price since the announcement of the Merger.
See Note 11 to the financial statements under "Merger with Southern Company" for additional information.
Interest Expense, Net of Amounts Capitalized
For the successor period of July 1, 2016 through December 31, 2016, interest expense, net of amounts capitalized, was $81 million, reflecting the $19 million fair value adjustment on long-term debt in acquisition accounting, as well as interest expense incurred as a result of new debt issuances. See Note 6 to the financial statements for additional information.
For the predecessor period of January 1, 2016 through June 30, 2016, interest expense, net of amounts capitalized, was $96 million, reflecting debt issuances and redemptions during the period, and interest expensed for regulatory infrastructure programs as the Company expensed previously deferred interest with the corresponding recovery in revenue.
For the predecessor year ended December 31, 2015, interest expense, net of amounts capitalized, was $175 million, a decrease of $7 million, or 3.8%, compared to the same period in 2014. The decrease was due to an increase in deferred interest of $7 million related to regulatory infrastructure program expenses.
See FUTURE EARNINGS POTENTIAL – "Financing Activities" herein for additional information.
Earnings from Equity Method Investments
For the successor period of July 1, 2016 through December 31, 2016, earnings from equity method investments were $60 million, primarily reflecting earnings from the Company's September 2016 investment in SNG.
For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, earnings from equity method investments were not material.
Other Income (Expense), Net
For the successor period of July 1, 2016 through December 31, 2016, other income (expense), net was $14 million related primarily to the tax gross-up of contributions received from customers and spending under regulatory infrastructure programs.
For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, other income (expense), net was $5 million, $9 million, and $9 million, respectively.
Income Taxes
For the successor period of July 1, 2016 through December 31, 2016, income taxes were $76 million. The effective tax rate in this period reflects certain nondeductible Merger-related charges.
For the predecessor period of January 1, 2016 through June 30, 2016, income taxes were $87 million. The effective tax rate in this period reflects certain nondeductible Merger-related expenses and other charges.
For the predecessor year ended December 31, 2015, income taxes were $213 million, a decrease of $137 million, or 39.1%, compared to 2014, primarily due to higher pre-tax earnings in 2014 resulting from extremely cold weather.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Noncontrolling Interest
Prior to the October 3, 2016 acquisition of Piedmont's 15% interest in SouthStar, net income attributable to noncontrolling interest was recorded on the consolidated statements of income. Since the Company now owns 100% of SouthStar's equity interests, it will not record net income attributable to noncontrolling interest related to SouthStar in future periods. See Note 4 to the financial statements under "Variable Interest Entities" for additional information.
Effects of Inflation
The Company is subject to rate regulation that is generally based on the recovery of historical and projected costs. The effects of inflation can create an economic loss since the recovery of costs could be in dollars that have less purchasing power. Any adverse effect of inflation on the Company's results of operations has not been substantial in recent years.
Performance and Non-GAAP Measures
Prior to the Merger, the Company evaluated segment performance using earnings before interest and taxes (EBIT), which includes operating income and other income (expenses) and excludes interest expense, net of amounts capitalized, and income taxes, which the Company evaluated on a consolidated basis for those periods. EBIT is used herein to discuss the results of the Company's segments for all predecessor periods, as EBIT was the primary measure of segment profit or loss for those periods. Subsequent to the Merger, the Company changed its segment performance measure from EBIT to net income to better align with the performance measure utilized by its new parent company. EBIT for the successor period of July 1, 2016 through December 31, 2016 presented herein is considered a non-GAAP measure. The Company also discusses consolidated EBIT, which is considered a non-GAAP measure for all periods presented herein. The presentation of consolidated EBIT is believed to provide useful supplemental information regarding a consolidated measure of profit or loss. The Company further believes the presentation of segment EBIT for the successor period of July 1, 2016 through December 31, 2016 is useful as it allows for a measure of comparability to other companies with different capital and legal structures, which accordingly may be subject to different interest rates and effective tax rates. The applicable reconciliations of net income to consolidated EBIT and segment EBIT, respectively, are provided herein.
Adjusted operating margin is a non-GAAP measure that is calculated as operating revenues minus cost of natural gas, cost of other sales, and revenue tax expense. Adjusted operating margin excludes other operations and maintenance expenses, depreciation and amortization, taxes other than income taxes, and Merger-related expenses, which are included in the calculation of operating income as calculated in accordance with GAAP and reflected in the consolidated statements of income. The presentation of adjusted operating margin is believed to provide useful information regarding the contribution resulting from customer growth at gas distribution operations since the cost of natural gas and revenue tax expense can vary significantly and are generally billed directly to customers. The Company further believes that utilizing adjusted operating margin at gas marketing services, wholesale gas services, and gas midstream operations allows it to focus on a direct measure of adjusted operating margin before overhead costs. The applicable reconciliation of operating income to adjusted operating margin is provided herein.
EBIT and adjusted operating margin should not be considered alternatives to, or more meaningful indicators of, the Company's operating performance than consolidated net income attributable to the Company or operating income as determined in accordance with GAAP. In addition, the Company's adjusted operating margin may not be comparable to similarly titled measures of other companies.
See RESULTS OF OPERATIONS herein for information on the Company's financial performance.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Reconciliations of consolidated operating income to adjusted operating margin and consolidated net income attributable to the Company to EBIT are as follows:
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
 (in millions)  (in millions)
Operating Income$197
  $321
 $746
 $1,095
Other operating expenses(a)
832
  815
 1,550
 1,527
Gain on disposition of assets
  
 
 (2)
Revenue tax expense(b)
(31)  (56) (101) (130)
Adjusted Operating Margin$998
  $1,080
 $2,195
 $2,490
(a)Adjusted for the following operating expenses: other operations and maintenance, depreciation and amortization, taxes other than income taxes, and Merger-related expenses.
(b)Adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
 (in millions)  (in millions)
Consolidated Net Income Attributable to Southern Company Gas$114
  $131
 $353
 $562
Net income attributable to noncontrolling interest
  14
 20
 18
Income taxes76
  87
 213
 350
Interest expense, net of amounts capitalized81
  96
 175
 182
EBIT$271
  $328
 $761
 $1,112
Segment Information
Adjusted operating margin, operating expenses, and the Company's primary performance metric for each segment are illustrated in the tables below.
  Successor  Predecessor
  July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016
  
 Adjusted Operating Margin(*)
 
Operating Expenses(*)
 Net Income  
Adjusted Operating Margin(*)
 
Operating Expenses(*)
 EBIT
  (in millions)  (in millions)
Gas distribution operations $817
 $595
 $77
  $911
 $560
 $353
Gas marketing services 139
 112
 19
  190
 81
 109
Wholesale gas services 24
 26
 
  (36) 33
 (68)
Gas midstream operations 19
 26
 20
  15
 24
 (6)
All other 3
 46
 (2)  4
 65
 (60)
Intercompany eliminations (4) (4) 
  (4) (4) 
Consolidated $998
 $801
 $114
  $1,080
 $759
 $328
(*)Adjusted operating margin and operating expenses are adjusted for Nicor Gas revenue tax expenses, which are passed through directly to customers.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


  Predecessor
  Year Ended December 31, 2015 Year Ended December 31, 2014
  
Adjusted Operating Margin(*)
 
Operating Expenses(*)
 EBIT 
Adjusted Operating Margin(*)
 
Operating Expenses(*)
 EBIT
  (in millions) (in millions)
Gas distribution operations $1,657
 $1,086
 $581
 $1,648
 $1,075
 $582
Gas marketing services 317
 165
 152
 311
 179
 132
Wholesale gas services 183
 71
 110
 501
 79
 425
Gas midstream operations 36
 62
 (23) 31
 50
 (17)
All other 7
 70
 (59) 7
 22
 (10)
Intercompany eliminations (5) (5) 
 (8) (8) 
Consolidated $2,195
 $1,449
 $761
 $2,490
 $1,397
 $1,112
(*)Adjusted operating margin and operating expenses are adjusted for Nicor Gas revenue tax expenses, which are passed through directly to customers.
Gas Distribution Operations
Gas distribution operations is the largest component of the Company's business and is subject to regulation and oversight by agencies in each of the states in which it serves. These agencies approve natural gas rates designed to provide the Company with the opportunity to generate revenues to recover the cost of natural gas delivered to its customers and its fixed and variable costs, including depreciation, interest, maintenance, and overhead costs, and to earn a reasonable return on its investments.
With the exception of Atlanta Gas Light, the Company's second largest utility that operates in a deregulated natural gas market and has a straight-fixed-variable rate design that minimizes the variability of its revenues based on consumption, the earnings of the regulated natural gas distribution utilities can be affected by customer consumption patterns that are a function of weather conditions, price levels for natural gas, and general economic conditions that may impact customers' ability to pay for natural gas consumed. The Company has various weather mechanisms, such as weather normalization mechanisms and weather derivative instruments, that limit its exposure to weather changes within typical ranges in its natural gas utilities' service territories.
Successor Period of July 1, 2016 through December 31, 2016
Net income of $77 million includes $817 million in adjusted operating margin, $595 million in operating expenses, and $11 million in other income (expense), net resulting in EBIT of $233 million. Net income also includes $105 million in interest expense and $51 million in income tax expense. Adjusted operating margin reflects revenue from continued investment in infrastructure replacement programs, partially offset by the impact of warm weather, net of hedging. Operating expenses reflect the depreciation associated with additional assets placed in service and the related expenses associated with pipeline compliance and maintenance activities.
Predecessor Period of January 1, 2016 through June 30, 2016
EBIT of $353 million includes $911 million in adjusted operating margin, $560 million in operating expense, and $2 million in other income (expense), net. Adjusted operating margin reflects increased revenue from continued investment in infrastructure replacement programs, increased customer usage and growth, partially offset by the impact of warm weather, net of hedging. Operating expenses reflect the depreciation associated with additional assets placed in service and the related expenses associated with pipeline compliance and maintenance activities.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Predecessor Years Ended December 31, 2015 and 2014
Gas distribution operations' year-over-year EBIT changes are presented in the following table:
 (in millions)
EBIT – 2014$582
Adjusted operating margin 
Increase from pipeline infrastructure programs, primarily at Atlanta Gas Light and Nicor Gas34
Increase mainly driven by customer usage and growth13
Decrease related to weather, net of hedging(20)
Decrease in rider program recoveries at Nicor Gas, offset in operating expenses below(18)
Increase in adjusted operating margin9
Operating expenses 
Decrease in rider program recoveries at Nicor Gas, offset in adjusted operating margin above(18)
Increase in depreciation due to additional assets placed in service19
Increase in benefit expenses primarily related to higher pension costs and medical benefits12
Increase in 2015 due to write-off of PRP-related costs from global settlement5
Increase in payroll and variable compensation costs9
Decrease in bad debt expenses due to changes in natural gas consumption and prices(2)
Decrease in weather-related expenses(4)
Decrease in outside services and other expenses primarily due to maintenance programs(5)
Decrease in fleet expenses resulting from lower fuel prices(5)
Increase in operating expenses11
Increase in other income1
EBIT – 2015$581
Gas Marketing Services
Gas marketing services consists of several businesses that provide energy-related products and services to natural gas markets. Gas marketing services is weather sensitive and uses a variety of hedging strategies, such as weather derivative instruments and other risk management tools, to partially mitigate potential weather impacts.
Successor Period of July 1, 2016 through December 31, 2016
Net income of $19 million includes $139 million in adjusted operating margin and $112 million in operating expenses, resulting in EBIT of $27 million. Net income also includes $1 million in interest expense and $7 million in income tax expense. Adjusted operating margin reflects a reduction of $5 million due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting. Also reflected in adjusted operating margin are unrealized hedge gains and LOCOM adjustments. Operating expenses reflect a $2 million reduction in operations and maintenance expense and $23 million in additional amortization of intangible assets due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting, as well as $6 million in litigation-related expense.
Predecessor Period of January 1, 2016 through June 30, 2016
EBIT of $109 million includes $190 million in adjusted operating margin and $81 million in operating expenses. Adjusted operating margin reflects revenue from gas marketing and warranty sales, which were partially offset by the impact of warm weather, net of hedging. Operating expenses reflect lower bad debt, marketing, and depreciation and amortization, compared to the same period in the prior year.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Predecessor Years Ended December 31, 2015 and 2014
Gas marketing services' year-over-year EBIT changes are presented in the following table:
 (in millions)
EBIT – 2014$132
Adjusted operating margin 
Increase in value of unrealized hedges as a result of changes in NYMEX natural gas prices,
net of recoveries
19
Increase in warranty margins2
LOCOM adjustments, net of recoveries3
Decrease in gas marketing margins(8)
Decrease due to weather, net of weather hedging(9)
Other(1)
Increase in adjusted operating margin6
Operating expenses 
Decrease in depreciation and amortization(3)
Decrease in outside services, labor and marketing expenses(8)
Decrease in other expenses, primarily bad debt expenses(3)
Decrease in operating expenses(14)
EBIT – 2015$152
Wholesale Gas Services
Wholesale gas services is involved in asset management and optimization, storage, transportation, producer and peaking services, natural gas supply, natural gas services, and wholesale gas marketing. The Company has positioned the business to generate positive economic earnings even under low volatility market conditions that can result from a number of factors. When market price volatility increases, as in 2015, wholesale gas services is well positioned to capture significant value and generate stronger results. Wholesale gas services generated strong economic results for the successor period of July 1, 2016 through December 31, 2016, primarily due to capturing natural gas storage value resulting from widening forward storage seasonal spreads that will be realized upon the ultimate withdrawal from storage and sale of natural gas.
Successor Period of July 1, 2016 through December 31, 2016
Net income includes $24 million in adjusted operating margin, $26 million in operating expenses, and $2 million in other income (expense), net, resulting in no EBIT. Also included are $3 million in interest expense and $3 million in income tax benefit. Adjusted operating margin reflects a decrease of $10 million due to fair value adjustments to certain assets and liabilities in the application of acquisition accounting. Also reflected in adjusted operating margin are mark-to-market losses due to high natural gas prices in the fourth quarter 2016 and low revenue from commercial activity due to low volatility in natural gas prices and warm weather. Operating expenses reflect low incentive compensation expense due to low earnings.
Predecessor Period of January 1, 2016 through June 30, 2016
Loss before interest and taxes of $68 million includes $(36) million in adjusted operating margin, $33 million in operating expense, and $1 million in other income (expense), net. Adjusted operating margin reflects mark-to-market losses as a result of changes in natural gas prices, lower commercial activity driven by changes in price volatility, and a decrease due to mark-to-market losses on storage hedge derivatives of transportation and forward commodity derivatives from price movements related to natural gas transportation positions. Operating expenses reflect lower incentive compensation expense as compared to the same period in the prior year due to lower earnings.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Predecessor Years Ended December 31, 2015 and 2014
Wholesale gas services' year-over-year EBIT changes are presented in the following table:
 (in millions)
EBIT – 2014$425
Adjusted operating margin 
Decrease in mark-to-market gains of storage derivatives as a result of changes in NYMEX natural gas prices(41)
Decrease in commercial activity driven by changes in price volatility(304)
Decrease in the value of transportation and forward commodity derivatives from price movements related
to natural gas transportation positions
(27)
LOCOM adjustments, net of current period recoveries54
Decrease in adjusted operating margin(318)
Operating expenses 
Decrease in compensation and benefits driven largely by year-over-year changes in earnings and capture of
natural gas storage value
(8)
Decrease in operating expenses(8)
Decrease in other income primarily related to the gain on sale of Compass Energy in 2014(5)
EBIT – 2015$110
The following table illustrates the components of wholesale gas services' adjusted operating margin for the periods presented:
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016   2016 2015 2014
 (in millions)  (in millions)
Commercial activity recognized$(10)  $34
 $140
 $444
Gain (loss) on storage derivatives(20)  (38) 45
 86
Gain (loss) on transportation and forward
commodity derivatives
64
  (31) 11
 38
LOCOM adjustments, net of current period recoveries
  (1) (13) (67)
Purchase accounting adjustments to fair value
inventory and contracts
(10)  
 
 
Adjusted operating margin$24
  $(36) $183
 $501
Change in Commercial Activity
The commercial activity at wholesale gas services includes recognition of storage and transportation values that were generated in prior periods, which reflect the impact of prior period hedge gains and losses as associated physical transactions occur. Increases in natural gas supply and warmer-than-normal weather during the 2015/2016 Heating Season and the resulting higher natural gas inventories at the end of 2015 caused natural gas prices to decline in the early part of 2016. However, as natural gas prices and forward storage or time spreads increased, largely in the first half of 2016, wholesale gas services was able to capture higher storage values to accommodate the increase in natural gas supply. While wholesale gas services experienced unusually high volatility in natural gas prices in early 2015 and low volatility in 2016 due partly to weather, in the near term, the Company anticipates continued low volatility in certain areas of wholesale gas services' portfolio.
Change in Storage and Transportation Derivatives
Volatility in the natural gas market arises from a number of factors, such as weather fluctuations or changes in supply or demand for natural gas in different regions of the U.S. The volatility of natural gas commodity prices has a significant impact on the Company's customer rates, long-term competitive position against other energy sources, and the ability of wholesale gas services to capture value from locational and seasonal spreads. In 2016, there was little price volatility; however, the potential for market

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


fundamentals indicating some level of increased volatility that would potentially benefit the Company's portfolio of pipeline transportation capacity exists. Additionally, increases in natural gas prices during 2016 and forward storage or time spreads applicable to the locations of wholesale gas services' specific storage positions resulted in storage derivative losses. Transportation and forward commodity derivative gains are primarily the result of narrowing transportation basis spreads due to continued supply constraints and increases in natural gas supply and warmer-than-normal weather, which impacted forward prices at natural gas receipt and delivery points, primarily in the Northeast and Midwest regions.
The natural gas that the Company purchases and injects into storage is accounted for at the LOCOM value utilizing gas daily or spot prices at the end of the year. Wholesale gas services recorded $1 million of LOCOM adjustments in the successor period of July 1, 2016 through December 31, 2016. Wholesale gas services recorded LOCOM adjustments excluding the impact of current period receivables of $3 million, $19 million, and $73 million for the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, respectively.
Withdrawal Schedule and Physical Transportation Transactions
The expected natural gas withdrawals from storage and expected offset to prior hedge losses/gains associated with the transportation portfolio of wholesale gas services are presented in the following table, along with the net operating revenues expected at the time of withdrawal from storage and the physical flow of natural gas between contracted transportation receipt and delivery points. Wholesale gas services' expected net operating revenues exclude storage and transportation demand charges, as well as other variable fuel, withdrawal, receipt, and delivery charges, but are net of the estimated impact of profit sharing under its asset management agreements. Further, the amounts that are realizable in future periods are based on the inventory withdrawal schedule, planned physical flow of natural gas between the transportation receipt and delivery points, and forward natural gas prices at December 31, 2016. A portion of wholesale gas services' storage inventory and transportation capacity is economically hedged with futures contracts, which results in the realization of substantially fixed net operating revenues.
 Storage Withdrawal Schedule  
 
Total storage
(WACOG $2.76)
 
Expected net operating gains(a)
 
Physical Transportation Transactions – Expected Net Operating Gains (Losses)(b)
 (in mmBtu in millions) (in millions) (in millions)
201767.2
 $56
 $(38)
2018 and thereafter2.9
 3
 6
Total at December 31, 201670.1
 $59
 $(32)
(a)Represents expected operating gains from planned storage withdrawals associated with existing inventory positions and could change as wholesale gas services adjusts its daily injection and withdrawal plans in response to changes in future market conditions and forward NYMEX price fluctuations. Also includes the impact of purchase accounting adjustments to reflect natural gas storage inventory at market value. Excluding the impact of these adjustments, the expected net operating gains at December 31, 2016 would have been $85 million.
(b)Represents the periods associated with the transportation derivative (gains) and losses during which the derivatives will be settled and the physical transportation transactions will occur that offset the derivative (gains) and losses that were previously recognized.
The unrealized storage and transportation derivative losses do not change the underlying economic value of wholesale gas services' storage and transportation positions and, based on current expectations, will primarily be reversed in 2017 when the related transactions occur and are recognized.
Gas Midstream Operations
Since the acquisition of the Company's 50% interest in SNG in September 2016, gas midstream operations consists primarily of gas pipeline investments, with storage and fuels also aggregated into this segment. Gas pipeline investments consist of the SNG interest, Horizon Pipeline, Atlantic Coast Pipeline, PennEast Pipeline, Dalton Pipeline, and Magnolia Pipeline.
Successor Period of July 1, 2016 through December 31, 2016
Net income of $20 million includes $19 million in adjusted operating margin, $26 million in operating expenses, and $59 million in other income, which results in EBIT of $52 million. Other income consists primarily of equity in earnings from the September 2016 investment in SNG. Also included in net income are $16 million in interest expense and $16 million in income tax expense.
Predecessor Periods of January 1, 2016 through June 30, 2016 and the Years Ended December 31, 2015 and 2014
Loss before interest and taxes for this segment for the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014 were $6 million, $23 million, and $17 million, respectively.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


All Other
All other includes the Company's investment in Triton, AGL Services Company, and Southern Company Gas Capital, as well as various corporate operating expenses that are not allocated to the reportable segments.
Successor Period of July 1, 2016 through December 31, 2016
Operating expenses included Merger-related expenses of $41 million primarily comprised of compensation-related expenses, financial advisory fees, legal expenses, and other Merger-related costs and $8 million in expenses associated with certain benefit arrangements.
Predecessor Periods of January 1, 2016 through June 30, 2016 and the Years Ended December 31, 2015 and 2014
For the predecessor periods of January 1, 2016 through June 30, 2016 and the year ended December 31, 2015, operating expenses included Merger-related expenses of $56 million and $44 million, respectively. These expenses are primarily comprised of financial advisory and legal expenses as well as additional compensation-related expenses, including acceleration of share-based compensation expenses, and change-in-control compensation charges. See Note 11 to the financial statements under "Merger with Southern Company" for additional information.
Segment Reconciliations
Reconciliations of consolidated net income attributable to Southern Company Gas to EBIT for the successor period of July 1, 2016 through December 31, 2016, and operating income to adjusted operating margin for all periods presented, are in the following tables. See Note 12 to the financial statements for additional segment information.
 Successor
 July 1, 2016 through December 31, 2016
 Gas Distribution OperationsGas Marketing ServicesWholesale Gas ServicesGas Midstream OperationsAll OtherIntercompany EliminationConsolidated
 (in millions)
Consolidated Net Income$77
$19
$
$20
$(2)$
$114
Income taxes51
7
(3)16
5

76
Interest expense, net of
amounts capitalized
105
1
3
16
(44)
81
EBIT$233
$27
$
$52
$(41)$
$271
 Successor
 July 1, 2016 through December 31, 2016
 Gas Distribution OperationsGas Marketing ServicesWholesale Gas ServicesGas Midstream OperationsAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$222
$27
$(2)$(7)$(43)$
$197
Other operating expenses(a)
626
112
26
26
46
(4)832
Revenue tax expense(b)
(31)




(31)
Adjusted Operating Margin 
$817
$139
$24
$19
$3
$(4)$998

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


 Predecessor
 January 1, 2016 through June 30, 2016
 Gas Distribution OperationsGas Marketing ServicesWholesale Gas ServicesGas Midstream OperationsAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$351
$109
$(69)$(9)$(61)$
$321
Other operating expenses(a)
616
81
33
24
65
(4)815
Revenue tax expense(b)
(56)




(56)
Adjusted Operating Margin 
$911
$190
$(36)$15
$4
$(4)$1,080
 Predecessor
 Year Ended December 31, 2015
 Gas Distribution OperationsGas Marketing ServicesWholesale Gas ServicesGas Midstream OperationsAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$571
$152
$112
$(26)$(63)$
$746
Other operating expenses(a)
1,187
165
71
62
70
(5)1,550
Revenue tax expense(b)
(101)




(101)
Adjusted Operating Margin 
$1,657
$317
$183
$36
$7
$(5)$2,195
 Predecessor
 Year Ended December 31, 2014
 Gas Distribution OperationsGas Marketing ServicesWholesale Gas ServicesGas Midstream OperationsAll OtherIntercompany EliminationConsolidated
 (in millions)
Operating Income (Loss)$573
$132
$425
$(19)$(16)$
$1,095
Other operating expenses(a)
1,205
179
79
50
22
(8)1,527
Gain on disposition of assets

(3)
1

(2)
Revenue tax expense(b)
(130)




(130)
Adjusted Operating Margin 
$1,648
$311
$501
$31
$7
$(8)$2,490
(a)Adjusted for the following operating expenses: other operations and maintenance, depreciation and amortization, taxes other than income taxes, goodwill impairment in 2015, and Merger-related expenses.
(b)Adjusted for Nicor Gas' revenue tax expenses, which are passed through directly to customers.
FUTURE EARNINGS POTENTIAL
General
The results of operations for the past three years are not necessarily indicative of future earnings potential. The level of the Company's future earnings depends on numerous factors that affect the opportunities, challenges, and risks of the Company's primary business of natural gas distribution and its complementary businesses in gas marketing services, wholesale gas services, and gas midstream operations. These factors include the Company's ability to maintain a constructive regulatory environment that continues to allow for the timely recovery of prudently incurred costs, the completion and subsequent operation of ongoing infrastructure and other construction projects, creditworthiness of customers, the Company's ability to optimize its transportation and storage positions, and its ability to re-contract storage rates at favorable prices. Future earnings will be driven primarily by customer growth, which is subject to a number of factors. These factors include weather, competition, new energy contracts with other utilities, energy conservation practiced by customers, the use of alternative energy sources by customers, the price of natural gas, the price elasticity of demand, and the rate of economic growth or decline in the Company's service territories. Demand for natural gas is primarily driven by economic growth. The pace of economic growth and natural gas demand may be affected by

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


changes in regional and global economic conditions, which may impact future earnings. Current proposals related to potential tax reform legislation are primarily focused on reducing the corporate income tax rate, allowing 100% of capital expenditures to be deducted, and eliminating the interest deduction. The ultimate impact of any tax reform proposals is dependent on the final form of any legislation enacted and the related transition rules and cannot be determined at this time, but could have a material impact on the Company's financial statements.
Volatility of natural gas prices has a significant impact on the Company's customer rates, long-term competitive position against other energy sources, and the ability of gas marketing services and wholesale gas services to capture value from locational and seasonal spreads. Additionally, changes in commodity prices subject a significant portion of the Company's operations to earnings variability.
Over the longer term, the Company expects volatility to be low to moderate and locational and/or transportation spreads to decrease as new pipelines are built to reduce the existing supply constraints in the shale areas of the Northeast U.S. To the extent these pipelines are delayed or not built, volatility could increase. Additional economic factors may contribute to this environment, including a significant drop in oil and natural gas prices, which could lead to consolidation of natural gas producers or reduced levels of natural gas production. Further, if economic conditions continue to improve, including the new housing market, the demand for natural gas may increase, which may cause natural gas prices to rise and drive higher volatility in the natural gas markets on a longer term basis.
On September 1, 2016, the Company acquired a 50% equity interest in SNG. See Overview – "Investment in SNG" herein and Notes 4 and 11 to the financial statements under "Equity Method Investments – SNG" and "Investment in SNG," respectively, for additional information.
On October 3, 2016, the Company completed its purchase of Piedmont's 15% interest in SouthStar. See Overview – "Other Matters" herein and Note 4 to the financial statements under "Variable Interest Entities" for additional information.
Environmental Matters
Compliance costs related to federal and state environmental statutes and regulations could affect earnings if such costs cannot continue to be recovered in rates on a timely basis or through market-based contracts. Environmental compliance spending over the next several years may differ materially from the amounts estimated. The timing, specific requirements, and estimated costs could change as environmental statutes and regulations are adopted or modified, as compliance plans are revised or updated, and if legal challenges to rules are completed. Further, higher costs that are recovered through regulated rates could contribute to reduced demand for natural gas, which could negatively affect results of operations, cash flows, and financial condition. See Note 3 to the financial statements under "Environmental Matters" for additional information.
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including the handling and disposal of waste and releases of hazardous substances. Compliance with these environmental requirements involves significant capital and operating costs to clean up affected sites. The Company conducts studies to determine the extent of any required cleanup and has recognized in its financial statements the costs to clean up known impacted sites. The natural gas distribution utilities in Illinois, New Jersey, Georgia, and Florida have each received authority from their respective state regulators to recover approved environmental compliance costs through regulatory mechanisms.
The Company is subject to environmental remediation liabilities associated with former MGP sites in five different states. Accrued environmental remediation costs of $426 million have been recorded in the balance sheets at December 31, 2016, $69 million of which is expected to be incurred over the next 12 months. These environmental remediation expenditures are recoverable from customers through rate mechanisms approved by the applicable state regulatory agencies, with the exception of one site representing $5 million of the total accrued remediation costs. See FINANCIAL CONDITION AND LIQUIDITY – "Capital Requirements and Contractual Obligations" herein for additional information.
In September 2015, the EPA filed an administrative complaint and notice of opportunity for hearing against Nicor Gas. The complaint alleges violation of the regulatory requirements applicable to polychlorinated biphenyls in the Nicor Gas natural gas distribution system and the EPA seeks a total civil penalty of approximately $0.3 million. On January 26, 2017, the EPA notified Nicor Gas that it agreed to voluntarily dismiss its administrative complaint with prejudice and without payment of a civil penalty or other further obligation on the part of Nicor Gas.
The Company's ultimate environmental compliance strategy and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations and the outcome of any legal challenges to the environmental rules. The ultimate outcome of these matters cannot be determined at this time.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Compliance with any new federal or state legislation or regulations or other environmental and health concerns could significantly affect the Company. Although new or revised environmental legislation or regulations could affect many areas of the Company's operations, the full impact of any such changes cannot be determined at this time. Additionally, many of the Company's commercial and industrial customers may also be affected by existing and future environmental requirements, which for some may have the potential to ultimately affect their demand for natural gas.
The Company's results of operations, cash flows, and financial condition could be significantly impacted if such costs are not recovered through regulated rates. However, the ultimate financial and operational impact of the final rules on the Company cannot be determined at this time and will depend upon numerous factors, including the Company's ongoing review of the final rules; the outcome of legal challenges; individual state implementation of the EPA's final guidelines, including the potential that state plans impose different standards; additional rulemaking activities in response to legal challenges and related court decisions; and the time periods over which compliance will be required.
FERC Matters
The Company is involved in three significant pipeline construction projects within gas midstream operations. These projects, along with the Company's existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served. The following table provides an overview of these pipeline projects.
 Miles of Pipe 
Expected Capital
Expenditures
(a) 
 
Ownership
Interest
(a)
 FERC Filing Expected FERC Approval
   (in millions)      
Atlantic Coast Pipeline(b)
594
 $256
 5% 2015 2017
PennEast Pipeline(c)
118
 270
 20% 2015 2017
Dalton Pipeline(d)
115
 254
 50% 2015 
(e) 
Total827
 $780
      
(a)Represents the Company's expected capital expenditures and ownership interest as applicable, which may change.
(b)In 2014, the Company entered into a joint venture to construct and operate a natural gas pipeline that will run from West Virginia through Virginia and into eastern North Carolina to meet the region's growing demand for natural gas. The proposed pipeline project is expected to transport natural gas to customers in Virginia.
(c)In 2014, the Company entered into a joint venture to construct and operate a natural gas pipeline that will transport low-cost natural gas from the Marcellus Shale area to customers in New Jersey. The Company believes this will alleviate takeaway constraints in the Marcellus region and help mitigate some of the price volatility experienced during recent winters.
(d)In 2014, the Company entered into two agreements associated with the construction of the Dalton Pipeline, which will serve as an extension of the Transco pipeline system and provide additional natural gas supply to customers in Georgia. The first is a construction and ownership agreement and the second is an agreement to lease ownership in this lateral pipeline extension once it is placed in service.
(e)The Dalton Pipeline received FERC approval on August 3, 2016, and construction is currently underway.
In addition, on February 3, 2017, SNG filed an application with the FERC for approval of a proposed project, including the purchase of Georgia Power's existing approximately 20-mile McDonough lateral and the construction of a new compressor station, 4.9 miles of new line, and 1.6 miles of pipeline looping. The Company's portion of the expected capital expenditures for this project is approximately $120 million. Georgia Power will subsequently be filing for approval of the sale with the Georgia PSC.
Regulatory Matters
Utility Regulation and Rate Design
The natural gas distribution utilities are subject to regulations and oversight by their respective state regulatory agencies with respect to rates charged to their customers, maintenance of accounting records, and various service and safety matters. Rates charged to customers vary according to customer class (residential, commercial, or industrial) and rate jurisdiction. These agencies approve rates designed to provide the opportunity to generate revenues to recover all prudently incurred costs, including a return on rate base sufficient to pay interest on debt and provide a reasonable return. Rate base generally consists of the original cost of the utility plant in service, working capital, and certain other assets, less accumulated depreciation on the utility plant in service and net deferred income tax liabilities, and may include certain other additions or deductions.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


The natural gas market for Atlanta Gas Light was deregulated in 1997. Accordingly, Marketers, rather than a traditional utility, sell natural gas to end-use customers in Georgia and handle customer billing functions. The Marketers file their rates monthly with the Georgia PSC. As a result of operating in a deregulated environment, Atlanta Gas Light's role includes:
distributing natural gas for Marketers;
constructing, operating, and maintaining the gas system infrastructure, including responding to customer service calls and leaks;
reading meters and maintaining underlying customer premise information for Marketers; and
planning and contracting for capacity on interstate transportation and storage systems.
Atlanta Gas Light earns revenue by charging rates to its customers based primarily on monthly fixed charges that are set by the Georgia PSC and adjusted periodically. The Marketers add these fixed charges when billing customers. This mechanism, called a straight-fixed-variable rate design, minimizes the seasonality of Atlanta Gas Light's revenues since the monthly fixed charge is not volumetric or directly weather dependent.
With the exception of Atlanta Gas Light, the earnings of the natural gas distribution utilities can be affected by customer consumption patterns that are largely a function of weather conditions and price levels for natural gas. Specifically, customer demand substantially increases during the Heating Season when natural gas is used for heating purposes. The Company has various mechanisms, such as weather normalization mechanisms and weather derivative instruments, at most of its utilities that limit exposure to weather changes within typical ranges in these utilities' respective service territories.Recovery
With the exception of Atlanta Gas Light, the natural gas distribution utilities are authorized by the relevant regulatory agencies in the states in which they serve to use natural gas cost recovery mechanisms that allow adjustingadjust rates to reflect changes in the wholesale cost of natural gas and to ensure recovery of all of the costs prudently incurred in purchasing natural gas for customers. Since Atlanta Gas Light does not sell natural gas directly to its end-use customers, it does not utilize a traditional naturalNatural gas cost recovery mechanism. However, Atlanta Gas Light does maintainrevenues are adjusted for differences in actual recoverable natural gas inventory forcosts and amounts billed in current regulated rates. Changes in the Marketers in Georgia and recovers the cost through recovery mechanisms approved by the Georgia PSC specific to Georgia's deregulated market. In addition to natural gas recovery mechanisms, there are other cost recovery mechanisms, such as regulatory riders, which vary by utility but allow recovery of certain costs, such as those related to infrastructure replacement programs as well as environmental remediation and energy efficiency plans. In traditional rate designs, utilities recoverbilling factor will not have a significant portion ofeffect on Southern Company's or Southern Company Gas' revenues or net income, but will affect cash flows. At December 31, 2019 and 2018, the fixed customer serviceover recovered balances were $74 million and pipeline infrastructure costs based on assumed natural gas volumes used by customers. Three of the utilities have decoupled regulatory mechanisms that encourage conservation. The Company believes that separating, or decoupling, the recoverable amount of these fixed costs from the customer throughput volumes, or amounts of natural gas used by customers, encourages customers' energy conservation and ensures a more stable recovery of fixed costs.


MANAGEMENT'S DISCUSSION AND ANALYSISCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



$15 million, respectively, which were included in other regulatory liabilities on Southern Company's and Southern Company Gas' balance sheets.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the recovery of investments under the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for revised base rates to incorporate the reduction in the federal income tax rate as a result of the Tax Reform Legislation. The following tableresulting decrease of approximately $44 million in annual base rate revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
In November 2018, Nicor Gas filed a general base rate case with the Illinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides regulatory informationa monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
In February 2018, Atlanta Gas Light revised its annual base rate filing to reflect the impacts of the Tax Reform Legislation and requested a $16 million rate reduction. In May 2018, the Georgia PSC approved a stipulation for Atlanta Gas Light's annual base rates to remain at the 2017 level for 2018 and 2019, with customer credits of $8 million in each of July 2018 and October 2018 to reflect the impacts of the Tax Reform Legislation. The Georgia PSC maintained Atlanta Gas Light's previously authorized earnings band based on a ROE between 10.55% and 10.95% and increased the allowed equity ratio by 4% to an equity ratio of 55% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation.
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program investments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the Company's six largest utilities:2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
 Nicor Gas Atlanta Gas Light Elizabethtown Gas Virginia Natural Gas Florida City Gas Chattanooga Gas
Authorized return on equity(a)
10.17% 10.75% 10.30% 10.00% 11.25% 10.05%
Weather normalization(b)
    ü ü   ü
Decoupled, including straight-
fixed-variable rates
(c)
  ü   ü   ü
Regulatory infrastructure
program rates
(d)
ü ü ü ü ü  
Bad debt rider(e)
ü     ü   ü
Synergy sharing policy(f)
  ü        
Energy efficiency plan(g)
ü   ü ü ü ü
Last decision on change in rates2009 
2017(h)
 
2009(i)
 
2011(j)
 2004 2010
(a)The authorized return on equity represents those authorized at December 31, 2016.
(b)Regulatory mechanisms that allow recovery of costs in the event of unseasonal weather, but are not direct offsets to the potential impacts on earnings of weather and customer consumption. These mechanisms are designed to help stabilize operating results by increasing base rate amounts charged to customers when weather is warmer than normal and decreasing amounts charged when weather is colder than normal.
(c)Recovery of fixed customer service costs separately from assumed natural gas volumes used by customers.
(d)Programs that update or expand distribution systems and LNG facilities.
(e)The recovery (refund) of bad debt expense over (under) an established benchmark expense. Virginia Natural Gas and Chattanooga Gas recover the gas portion of bad debt expense through their purchased gas adjustment mechanisms.
(f)The recovery of 50% of net synergy savings achieved on mergers and acquisitions.
(g)Recovery of costs associated with plans to achieve specified energy savings goals.
(h)The Georgia PSC approved Atlanta Gas Light's petition for the Georgia Rate Adjustment Mechanism (GRAM) on February 21, 2017.
(i)Elizabethtown Gas filed a general rate case with the New Jersey BPU on September 1, 2016, which is scheduled to be resolved during 2017. See Note 3 to the financial statements under "Regulatory Matters – Base Rate Cases" for additional information.
(j)On December 13, 2016, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required at least 60 days prior to the filing of a general base rate case.
In 2017, the Virginia Commission approved a settlement for a $34 million increase in annual base rate revenues, effective September 1, 2017, including $13 million related to the recovery of investments under the SAVE program. See "Infrastructure Replacement Programs and Capital Projects" herein for additional information. An authorized ROE range of 9.0% to 10.0% with a midpoint of 9.5% will be used to determine the revenue requirement in any filing, other than for a change in base rates.
The Company continuesIn December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million effective January 1, 2019 due to focus on capital discipline and cost control while pursuing projects and initiatives that are expected to have current and future benefits to customers, provide an appropriate return on invested capital, and help to ensure the safety and reliabilitylower tax expense as a result of the utility infrastructure.Total capital expenditures incurred during 2016Tax Reform Legislation, along with customer refunds, via bill credits, for gas distribution operations$14 million related to 2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were $1.1 billion. The following table and discussions provide updates on the infrastructure replacement programs at the utilities, which are designed to update or expand the Company's distribution systems to improve reliability and meet operational flexibility and growth. The anticipated expenditures for these programs in 2017 are quantifiedcompleted in the discussion below.first quarter 2019.
On February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required prior to the filing of a base rate case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of this matter cannot be determined at this time.


MANAGEMENT'S DISCUSSIONCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Unrecognized Ratemaking Amounts
The following table illustrates Southern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain regulatory infrastructure programs. These amounts will be recognized as revenues in Southern Company Gas' financial statements in the periods they are billable to customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110

3. CONTINGENCIES, COMMITMENTS, AND ANALYSISGUARANTEES
General Litigation Matters
The Registrants are involved in various other matters being litigated and regulatory matters. The ultimate outcome of such pending or potential litigation or regulatory matters against each Registrant and any subsidiaries cannot be determined at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on such Registrant's financial statements.
The Registrants believe the pending legal challenges discussed below have no merit; however, the ultimate outcome of these matters cannot be determined at this time.
Southern Company
In January 2017, a securities class action complaint was filed against Southern Company, certain of its officers, and certain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company to make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in bringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are paid to municipalities) exceeded the amounts allowed in orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on 2 agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the first quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of Kemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that underlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and 3 members of the Mississippi PSC in the U.S. District Court for the Southern District of Mississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included 4 additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 under "Kemper County Energy Facility" for additional information.
Southern Power
Southern Power indirectly owns a 51% membership interest in RE Roserock LLC (Roserock), the owner of the Roserock facility in Pecos County, Texas. Prior to the facility being placed in service in 2016, certain solar panels were damaged during installation by the construction contractor, McCarthy Building Companies, Inc. (McCarthy), and certain solar panels were damaged by a hail event that also occurred during construction. In connection therewith, Southern Power withheld payment of approximately $26 million to the construction contractor, which placed a lien on the Roserock facility for the same amount. In 2017, Roserock filed a lawsuit in the state district court in Pecos County, Texas against XL Insurance America, Inc. and North American Elite Insurance Company seeking recovery from an insurance policy for damages resulting from the hail event and McCarthy's installation practices. In June 2018, the court granted Roserock's motion for partial summary judgment, finding that the insurers were in breach of contract and in violation of the Texas Insurance Code for failing to pay any monies owed for the hail claim. Separate lawsuits were filed between Roserock and McCarthy, as well as other parties, and that litigation was consolidated in the U.S. District Court for the Western District of Texas. On April 18, 2019, Roserock and the parties to the state and federal lawsuits executed a settlement agreement and mutual release that resolved both lawsuits. Following execution of the agreement, the lawsuits were dismissed, Southern Power paid McCarthy the amounts previously withheld, and McCarthy released its lien. As part of the settlement, Roserock received funds that covered all related legal costs, damages, and the replacement costs of certain solar panels. Funds received by Southern Power in excess of the initial replacement costs were recognized as a gain and included in other income (expense), net, with a portion allocated to noncontrolling interests. As a result, Southern Power recognized a $12 million after-tax gain in the second quarter 2019.
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could incur substantial costs to clean up affected sites. The traditional electric operating companies and the natural gas distribution utilities conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in the financial statements. A liability for environmental remediation costs is recognized only when a loss is determined to be probable and reasonably estimable. The traditional electric operating companies and the natural gas distribution utilities in Illinois and Georgia have each received authority from their respective state PSCs or other applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the state PSCs or other applicable state regulatory agencies. At December 31, 2019 and 2018, the environmental remediation liabilities of Alabama Power and Mississippi Power were immaterial.
Georgia Power has been designated or identified as a potentially responsible party at sites governed by the Georgia Hazardous Site Response Act and/or by the federal Comprehensive Environmental Response, Compensation, and Liability Act, and assessment and potential cleanup of such sites is expected. For all years presented, Georgia Power recovered approximately $2 million annually through the ECCR tariff. Effective January 1, 2020, Georgia Power is recovering approximately $12 million annually through the ECCR tariff under the 2019 ARP. Georgia Power recognizes a liability for environmental remediation costs only when it determines a loss is probable and reasonably estimable and reduces the reserve as expenditures are incurred. Any difference between the liabilities accrued and costs recovered through rates is deferred as a regulatory asset or liability. The annual recovery amount is expected to be adjusted in future regulatory proceedings.
On December 23, 2019, Mississippi Power entered into an agreement with the Mississippi Commission on Environmental Quality related to groundwater conditions arising from the closed ash pond at Plant Watson. Mississippi Power paid a civil penalty of $200,000 and will complete an assessment and remediation consistent with the requirements of the agreement and the CCR Rule. It is anticipated that corrective action will be needed; however, an estimate of remedial costs will not be available until further site assessment is completed. Mississippi Power expects to recover the retail portion of remedial costs through the ECO Plan and the wholesale portion through MRA rates.
Southern Company Gas is subject to environmental remediation liabilities associated with 40 former MGP sites in 4 different states. Southern Company Gas' accrued environmental remediation liability at December 31, 2019 and Subsidiary Companies 2016 Annual Report


2018 was based on the
Utility Program Program Details Recovery Expenditures in 2016 Expenditures Since Project Inception Miles of Pipe
Installed Since
Project Inception
 Scope of
Program
 Program Duration Last
Year of Program
        (in millions)   (miles) (years)  
Nicor Gas Investing in Illinois 
(a)(b) 
 Rider $298
 $571
 343
 800
 9
 2023
Atlanta Gas Light Integrated Vintage Plastic Replacement Program
(i-VPR)
 
(c)(i) 
 Rider 71
 201
 593
 756
 4
 2017
Atlanta Gas Light Integrated System Reinforcement Program
(i-SRP)
 
(g)(i) 
 Rider 62
 370
 n/a
 n/a
 8
 2017
Atlanta Gas Light Integrated Customer Growth Program
(i-CGP)
 
(h)(i) 
 Rider 8
 71
 n/a
 n/a
 8
 2017
Chattanooga Gas Bare Steel & Cast Iron 
(e) 
 Base Rates 3
 40
 90
 111
 10
 2020
Florida City Gas Safety, Access and Facility Enhancement Program (SAFE) 
(d) 
 Rider 11
 11
 38
 250
 10
 2025
Florida City Gas Galvanized Replacement Program 
(f) 
 Base Rates 1
 16
 80
 111
 17
 2017
Virginia Natural Gas Steps to Advance Virginia's Energy (SAVE and SAVE II) 
(a)(j) 
 Rider 32
 122
 204
 496
 10
 2021
Elizabethtown Gas Aging Infrastructure Replacement (AIR) 
(e)(k) 
 Base Rates 22
 99
 89
 130
 4
 2017
Total       $508
 $1,501
 1,437
 2,654
    
(a)Cast iron, bare steel, mid-vintage plastic, and risk-based materials.
(b)Represents expenditures on qualifying infrastructure that have been placed into service after the rate freeze expiration date, December 9, 2014.
(c)Early vintage plastic, risk-based mid-vintage plastic, and mid-vintage neighborhood convenience.
(d)Four-inch and smaller mains, associated service lines, and in some instances above-ground facilities associated with rear-lot easements.
(e)Cast iron and bare steel.
(f)Galvanized and X-Tube steel. Reflects expenditures and miles of pipe installed since the Company acquired Florida City Gas in 2004.
(g)Large diameter pressure improvement and system reinforcement projects.
(h)New business construction and strategic line extension.
(i)The Georgia PSC approved Atlanta Gas Light's petition for GRAM on February 21, 2017. See Note 3 to the financial statements under "Regulatory Matters – Base Rate Cases" for additional information.
(j)On December 13, 2016, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required at least 60 days prior to the filing of a general base rate case.
(k)Elizabethtown Gas filed a general rate case with the New Jersey BPU on September 1, 2016, which is scheduled to be resolved during 2017. See Note 3 to the financial statements under "Regulatory Matters – Base Rate Cases" for additional information.


MANAGEMENT'S DISCUSSION AND ANALYSISCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safetyestimated cost of environmental investigation and reliability enhancements to its distribution system. The legislation stipulates thatremediation associated with known current and former MGP operating sites. These environmental remediation expenditures are generally recoverable from customers through rate increases to customer bills as a result of any infrastructure investments shall not exceed an annual average of 4.0% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, under which Nicor Gas implemented rates that became effective in March 2015. During 2017, Nicor Gas expects to place into service $320 million of qualifying projects under Investing in Illinois.
Atlanta Gas Light
Atlanta Gas Light's four-year STRIDE program, which wasmechanisms approved by the Georgia PSC in 2013, is comprised of i-SRP, i-CGP, and i-VPR, and consists of infrastructure development, enhancement, and replacement programs that are used to update and expand distribution systems and LNG facilities, improve system reliability, and meet operational flexibility and growth. STRIDE includes a monthly surcharge on firm customers that was approved by the Georgia PSC to provide recoveryapplicable state regulatory agencies of the revenue requirement fornatural gas distribution utilities.
At December 31, 2019 and 2018, the ongoing programsenvironmental remediation liability and the PRP. This surcharge began in January 2015 and will continue through 2025.
The i-SRP program authorized $445 millionbalance of capital spending for projects to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, improve its peak-day system reliability and operational flexibility, and create a platform to meet long-term forecasted growth. Under i-SRP, Atlanta Gas Light must file an updated 10-year forecast of infrastructure requirements along with a new construction plan every three years for review and approval by the Georgia PSC. Atlanta Gas Light's most recent plan was approved in 2014. On August 1, 2016, Atlanta Gas Light filed a petition with the Georgia PSC for approval of a four-year extension of its i-SRP seeking approval to invest an additional $177 million to improve and upgrade its core gas distribution system in years 2017 through 2020. Capital investment associated with this filing for 2017 was includedunder recovered environmental remediation costs were reflected in the rate adjustment mechanism approved by the Georgia PSC on February 21, 2017. Capital investment in subsequent years under this filing will be included in future annual GRAM filings. See "Base Rate Cases" herein for additional information. During 2017, Atlanta Gas Light expects to invest $114 million under i-SRP.balance sheets as follows:
The i-CGP program authorized Atlanta Gas Light to spend $91 million on projects to extend its pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia. During 2017, Atlanta Gas Light expects to invest $21 million under i-CGP.
 Southern Company
Georgia
Power
Southern Company Gas
 (in millions)
December 31, 2019:   
Environmental remediation liability:   
Other current liabilities$51
$15
$36
Accrued environmental remediation234

233
Under recovered environmental remediation costs:   
Other regulatory assets, current$49
$12
$37
Other regulatory assets, deferred300
40
260
    
December 31, 2018:   
Environmental remediation liability:   
Other current liabilities$49
$23
$26
Accrued environmental remediation268

268
Under recovered environmental remediation costs:   
Other regulatory assets, current$21
$2
$19
Other regulatory assets, deferred345
53
292
The i-VPR program, which was approved by the Georgia PSC in 2013, authorized Atlanta Gas Light to spend $275 million to replace 756 miles of aging plastic pipe that was installed primarily in the mid-1960s to the early 1980s. Atlanta Gas Light has identified approximately 3,300 miles of vintage plastic mains in its system that should be considered for potential replacement over the next 15 to 20 years under this program. During 2017, Atlanta Gas Light expects to invest $80 million under i-VPR.
In conjunction with a joint stipulation associated with the annual rate adjustment mechanism approved by the Georgia PSC on February 21, 2017, Atlanta Gas Light's surcharges associated with the STRIDE programs will be included in base rates. See "Base Rate Cases" herein for additional information.
Elizabethtown Gas
Elizabethtown Gas' extension of the AIR enhanced infrastructure program effective in 2013 allowed for infrastructure investment of $115 million over four years, and is focused on the replacement of aging cast iron in its pipeline system. Carrying charges on the additional capital spend are being accrued and deferred for regulatory purposes at a WACC of 6.65%. In conjunction with the general base rate case filed with the New Jersey BPU on September 1, 2016, Elizabethtown Gas requested recovery of the AIR program. See "Base Rate Cases" herein for additional information. During 2017, Elizabethtown Gas expects to invest $10 million under this program.
In 2014, the New Jersey BPU approved Natural Gas Distribution Utility Reinforcement Effort (ENDURE), a program that improved Elizabethtown Gas' distribution system's resiliency against coastal storms and floods. Under the plan, Elizabethtown Gas invested $15 million in infrastructure and related facilities and communication planning over a one-year period from August 2014 through September 2015. Effective November 2015, Elizabethtown Gas increased its base rates for investments made under the program.
In September 2015, Elizabethtown Gas filed the Safety, Modernization and Reliability Tariff (SMART) plan with the New Jersey BPU seeking approval to invest more than $1.1 billion to replace 630 miles of vintage cast iron, steel, and copper pipeline, as well as 240 regulator stations. If approved, the program is expected to be completed by 2027. As currently proposed, costs incurred under the program would be recovered through a rider surcharge over a period of 10 years. The New Jersey BPU is expected to issue an order on this filing in 2017.
The ultimate outcome of these matters cannot be determined at this time.time; however, as a result of the regulatory treatment for environmental remediation expenses described above, the final disposition of these matters is not expected to have a material impact on the financial statements of the applicable Registrants.
Nuclear Fuel Disposal Costs
Acting through the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. government entered into contracts with Alabama Power and Georgia Power that require the DOE to dispose of spent nuclear fuel and high level radioactive waste generated at Plants Farley, Hatch, and Vogtle Units 1 and 2 beginning no later than January 31, 1998. The DOE has yet to commence the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, Alabama Power and Georgia Power pursued and continue to pursue legal remedies against the U.S. government for its partial breach of contract.
In 2014, Alabama Power and Georgia Power filed lawsuits against the U.S. government for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extended to December 31, 2014. On June 12, 2019, the Court of Federal Claims granted Alabama Power's and Georgia Power's motion for summary judgment on damages not disputed by the U.S. government, awarding those undisputed damages to Alabama Power and Georgia Power. However, those undisputed damages are not collectible and no amounts will be recognized in the financial statements until the court enters final judgment on the remaining damages.
In 2017, Alabama Power and Georgia Power filed additional lawsuits against the U.S. government in the Court of Federal Claims for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2015 through December 31, 2017. Damages will continue to accumulate until the issue is resolved, the U.S. government disposes of Alabama Power's and Georgia Power's spent nuclear fuel pursuant to its contractual obligations, or alternative storage is otherwise provided. No amounts have been recognized in the financial statements as of December 31, 2019 for any potential recoveries from the pending lawsuits.


MANAGEMENT'S DISCUSSION AND ANALYSISCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The final outcome of these matters cannot be determined at this time. However, Alabama Power and Georgia Power expect to credit any recoveries for the benefit of customers in accordance with direction from their respective PSC; therefore, no material impact on Southern Company's, Alabama Power's, or Georgia Power's net income is expected.
On-site dry spent fuel storage facilities are operational at all 3 plants and can be expanded to accommodate spent fuel through the expected life of each plant.
Nuclear Insurance
Under the Price-Anderson Amendments Act (Act), Alabama Power and Georgia Power maintain agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at the companies' nuclear power plants. The Act provides funds up to $13.9 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $450 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. A company could be assessed up to $138 million per incident for each licensed reactor it operates but not more than an aggregate of $20 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for Alabama Power and Georgia Power, based on its ownership and buyback interests in all licensed reactors, is $275 million and $267 million, respectively, per incident, but not more than an aggregate of $41 million and $40 million, respectively, to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. The next scheduled adjustment is due no later than November 1, 2023. See Note 5 under "Joint Ownership Agreements" for additional information on joint ownership agreements.
Alabama Power and Georgia Power are members of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, both companies have NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses and policies providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks, with a maximum per occurrence per unit limit of $490 million. After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted. Alabama Power and Georgia Power each purchase limits based on the projected full cost of replacement power, subject to ownership limitations, and have each elected a 12-week deductible waiting period for each nuclear plant.
A builders' risk property insurance policy has been purchased from NEIL for the construction of Plant Vogtle Units 3 and 4. This policy provides the Vogtle Owners up to $2.75 billion for accidental property damage occurring during construction.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for Alabama Power and Georgia Power as of December 31, 2019 under the NEIL policies would be $58 million and $85 million, respectively.
Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the applicable company or to its debt trustees as may be appropriate under the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered from customers, would be borne by Alabama Power or Georgia Power, as applicable, and could have a material effect on Southern Company's, Alabama Power's, and Georgia Power's financial condition and results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Other Matters
Southern Company
As discussed in Note 1 under "Leveraged Leases," a subsidiary of Southern Holdings has several leveraged lease agreements. The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of 1 of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation. While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2019. Southern Company will continue to monitor the operational performance of the underlying assets and evaluate the ability of the lessee to continue to make the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Alabama Power
On October 16, 2019, Alabama Power agreed to a consent order regarding a fish kill investigation. The consent order required Alabama Power to pay approximately $50,000 to the Alabama Department of Environmental Management in civil penalties and approximately $172,000 to the Alabama Department of Conservation and Natural Resources in fish restocking costs. Alabama Power paid the penalties and restocking costs during the fourth quarter 2019.
Mississippi Power
In 2013, Mississippi Power submitted a lost revenue claim under the Deepwater Horizon Economic and Property Damages Settlement Agreement associated with the oil spill that occurred in the Gulf of Mexico in 2010. In May 2018, Mississippi Power's claim was settled. The settlement proceeds of $18 million, net of expenses and income tax, were included in Mississippi Power's earnings for 2018. Mississippi Power received half of the settlement proceeds in 2018 and half in 2019.
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to seek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and economic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to completion of Mississippi Power's evaluations and applicable regulatory approvals, including by the FERC and the Mississippi PSC, and cannot be determined at this time. See Note 15 under "Southern Company" for information regarding the sale of Gulf Power.
Southern Company Gas
Gas Pipeline Projects
At December 31, 2019, Southern Company Gas was involved in 2 gas pipeline construction projects, the Atlantic Coast Pipeline project and the PennEast Pipeline project.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The Atlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 under "Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Expected project costs related to the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and federal agencies to obtain the required permits to begin construction on the PennEast Pipeline. On September 10, 2019, an appellate court ruled that the PennEast Pipeline does not have federal eminent domain authority over lands in which a state has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of certiorari to seek U.S. Supreme Court review of the appellate court decision. On December 30, 2019, PennEast Pipeline filed a two-year extension request with the FERC to complete the project by January 19, 2022.
Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in 2 phases. The first phase would consist of 68 miles of pipe, constructed entirely within Pennsylvania, which is expected to be completed by November 2021. The second phase would include the remaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the amended plan is required prior to beginning the first phase.
The ultimate outcome of these matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of which could result in an impairment of one or both of Southern Company Gas' investments and could have a material impact on Southern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was 0 impairment as of December 31, 2019.
See Note 3 under "Guarantees" and Note 7 under "Southern Company Gas" for additional information.
Natural Gas Storage Facilities
A wholly-owned subsidiary of Southern Company Gas owns and operates a natural gas storage facility consisting of 2 salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with rules of the Louisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not return to service by 2021. This change in plan, which affects the future operation of the entire storage facility, resulted in a pre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and overall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has 2 other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for the sellers and may imply an impact on future rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of either or both of these natural gas storage facilities, which have a combined net book value of $326 million at December 31, 2019.
The ultimate outcome of these matters cannot be determined at this time, but could have a material impact on the financial statements of Southern Company and Southern Company Gas.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 20162019 Annual Report



Virginia Natural GasCommitments
In 2012,To supply a portion of the Virginia Commission approvedfuel requirements of the SAVE program, an accelerated infrastructure replacement program,Southern Company system's electric generating plants, the Southern Company system has entered into various long-term commitments not recognized on the balance sheets for the procurement and delivery of fossil fuel and, for Alabama Power and Georgia Power, nuclear fuel. The majority of the Registrants' fuel expense for the periods presented was purchased under long-term commitments. Each Registrant expects that a substantial amount of its future fuel needs will continue to be completed overpurchased under long-term commitments.
Georgia Power has commitments, in the form of capacity purchases, regarding a five-year period. This program includesportion of a maximum allowance5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capital expenditurescapacity are required whether or not any capacity is available. Portions of $25the capacity payments made to MEAG Power for its Plant Vogtle Units 1 and 2 investment relate to costs in excess of Georgia Power's allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity is included in purchased power in Southern Company's statements of income and in purchased power, non-affiliates in Georgia Power's statements of income. Georgia Power's capacity payments related to this commitment totaled $6 million, per year, not to exceed $105$8 million, and $9 million in total. SAVE2019, 2018, and 2017, respectively. At December 31, 2019, Georgia Power's estimated long-term obligations related to this commitment totaled $56 million, consisting of $5 million for 2020, $5 million for 2021, $4 million for 2022, $3 million for 2023, $4 million for 2024, and $35 million for 2025 and thereafter.
See Note 9 for information regarding PPAs accounted for as leases.
Southern Company Gas has commitments for pipeline charges, storage capacity, and gas supply, including charges recoverable through natural gas cost recovery mechanisms or, alternatively, billed to marketers selling retail natural gas, as well as demand charges associated with Southern Company Gas' wholesale gas services. Gas supply commitments include amounts for gas commodity purchases associated with Southern Company Gas' gas marketing services of 45 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2019 and valued at $84 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its subsidiaries in support of payment obligations. Southern Company Gas' expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets at December 31, 2019 were as follows:
 Pipeline Charges, Storage Capacity, and Gas Supply
 (in millions)
2020$725
2021559
2022526
2023454
2024330
2025 and thereafter1,677
Total$4,271

Guarantees
SCS may enter into various types of wholesale energy and natural gas contracts acting as an agent for the traditional electric operating companies and Southern Power. Under these agreements, each of the traditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with each of the traditional electric operating companies to ensure they will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.
Alabama Power has guaranteed a $100 million principal amount long-term bank loan entered into by SEGCO in November 2018. Georgia Power has agreed to reimburse Alabama Power for the portion of such obligation corresponding to Georgia Power's proportionate ownership of SEGCO's stock if Alabama Power is subjectcalled upon to make such payment under its guarantee. At December 31, 2019, the capitalization of SEGCO consisted of $87 million of equity and $100 million of long-term debt, on which the annual review byinterest requirement is derived from a variable rate index. In addition, SEGCO had short-term debt outstanding of $26 million. See Note 7 under "SEGCO" for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In 2017, Atlantic Coast Pipeline executed a $3.4 billion revolving credit facility with a stated maturity date of October 2021. Southern Company Gas entered into a guarantee agreement to support its share of the Virginia Commission. Virginia Naturalrevolving credit facility. Southern Company Gas' maximum exposure to loss under the terms of the guarantee is limited to 5% of the outstanding borrowings under the credit facility, and totaled $88 million as of December 31, 2019. See "Other MattersSouthern Company Gas is recovering these program costs throughGas Pipeline Projects" herein and Note 7 under "Southern Company Gas" for additional information regarding the Atlantic Coast Pipeline.
As discussed in Note 9, Alabama Power and Georgia Power have entered into certain residual value guarantees related to railcar leases.
4. REVENUE FROM CONTRACTS WITH CUSTOMERS
The Registrants generate revenues from a rate rider thatvariety of sources, some of which are not accounted for as revenue from contracts with customers, such as leases, derivatives, and certain cost recovery mechanisms. ASC 606 became effective in 2012.
On March 9, 2016,on January 1, 2018 and the Virginia Commission approved an extensionRegistrants adopted it using the modified retrospective method applied to open contracts and only to the SAVE program to replace more than 200 milesversion of aging pipeline infrastructure.contracts in effect as of January 1, 2018. In accordance with the order approvingmodified retrospective method, the Registrants' previously issued financial statements have not been restated to comply with ASC 606 and the Registrants did not have a cumulative-effect adjustment to retained earnings. See Note 1 under "Revenues" for additional information on the revenue policies of the Registrants. See Notes 9 and 14 for additional information on revenue accounted for under lease and derivative accounting guidance, respectively.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following tables disaggregate revenue from contracts with customers for 2019 and 2018:
2019Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Operating revenues      
Retail electric revenues      
Residential$6,164
$2,509
$3,377
$278
$
$
Commercial5,065
1,677
3,097
291


Industrial3,126
1,460
1,360
306


Other90
25
54
11


Total retail electric revenues14,445
5,671
7,888
886


Natural gas distribution revenues      
Residential1,413




1,413
Commercial389




389
Transportation907




907
Industrial35




35
Other245




245
Total natural gas distribution revenues2,989




2,989
Wholesale electric revenues      
PPA energy revenues833
145
60
11
648

PPA capacity revenues453
102
54
3
322

Non-PPA revenues232
81
9
352
238

Total wholesale electric revenues1,518
328
123
366
1,208

Other natural gas revenues      
Gas pipeline investments32




32
Wholesale gas services2,095




2,095
Gas marketing services440




440
Other natural gas revenues42




42
Total natural gas revenues2,609




2,609
Other revenues1,035
153
407
19
12

Total revenue from contracts with customers22,596
6,152
8,418
1,271
1,220
5,598
Other revenue sources(a)
4,266
(27)(10)(7)718
3,637
Other adjustments(b)
(5,443)



(5,443)
Total operating revenues$21,419
$6,125
$8,408
$1,264
$1,938
$3,792
(a)Other revenue sources primarily relate to revenues from customers accounted for as derivatives and leases, as well as alternative revenues program at Southern Company Gas and other cost recovery mechanisms at the traditional electric operating companies.
(b)
Other adjustments relate to the cost of Southern Company Gas' energy and risk management activities. Wholesale gas services revenues are presented net of the related costs of those activities on the statement of income. See Note 16 under "Southern Company Gas" for additional information on the components of wholesale gas services' operating revenues.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2018Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Operating revenues      
Retail electric revenues      
Residential$6,586
$2,285
$3,295
$277
$
$
Commercial5,255
1,541
3,025
290


Industrial3,152
1,364
1,321
326


Other94
25
56
9


Total retail electric revenues15,087
5,215
7,697
902


Natural gas distribution revenues      
Residential1,525




1,525
Commercial436




436
Transportation944




944
Industrial40




40
Other230




230
Total natural gas distribution revenues3,175




3,175
Wholesale electric revenues      
PPA energy revenues950
158
81
15
727

PPA capacity revenues498
101
53
6
394

Non-PPA revenues263
119
24
329
230

Total wholesale electric revenues1,711
378
158
350
1,351

Other natural gas revenues      
Gas pipeline investments32




32
Wholesale gas services3,083




3,083
Gas marketing services571




571
Other natural gas revenues53




53
Total other natural gas revenues3,739




3,739
Other revenues1,529
210
236
22
13

Total revenue from contracts with customers25,241
5,803
8,091
1,274
1,364
6,914
Other revenue sources(a)
5,108
229
329
(9)841
3,849
Other adjustments(b)
(6,854)



(6,854)
Total operating revenues$23,495
$6,032
$8,420
$1,265
$2,205
$3,909
(a)Other revenue sources primarily relate to revenues from customers accounted for as derivatives and leases, as well as alternative revenues program at Southern Company Gas and other cost recovery mechanisms at the traditional electric operating companies.
(b)
Other adjustments relate to the cost of Southern Company Gas' energy and risk management activities. Wholesale gas services revenues are presented net of the related costs of those activities on the statement of income. See Note 16 under "Southern Company Gas" for additional information on the components of wholesale gas services' operating revenues.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Contract Balances
The following table reflects the closing balances of receivables, contract assets, and contract liabilities related to revenues from contracts with customers at December 31, 2019 and 2018:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Accounts Receivables      
As of December 31, 2019$2,413
$586
$688
$79
$97
$749
As of December 31, 20182,630
520
721
100
118
952
Contract Assets      
As of December 31, 2019$117
$
$69
$
$
$
As of December 31, 2018102

58



Contract Liabilities      
As of December 31, 2019$52
$10
$13
$
$1
$1
As of December 31, 201832
12
7

11
2
As of December 31, 2019 and 2018, Georgia Power had contract assets primarily related to fixed retail customer bill programs, where the payment is contingent upon Georgia Power's continued performance and the customer's continued participation in the program Virginiaover the one-year contract term, and unregulated service agreements, where payment is contingent on project completion. Alabama Power had contract liabilities for outstanding performance obligations primarily related to extended service agreements. Contract liabilities for Georgia Power and Southern Power relate to cash collections recognized in advance of revenue for certain unregulated service agreements and certain levelized PPAs, respectively. Southern Company's unregulated distributed generation business had contract assets of $40 million and $39 million at December 31, 2019 and 2018, respectively, and contract liabilities of $28 million and $11 million at December 31, 2019 and 2018, respectively, for outstanding performance obligations.
The following table reflects revenue from contracts with customers recognized in 2019 included in the contract liability at December 31, 2018:
 Southern CompanyAlabama PowerGeorgia PowerSouthern PowerSouthern Company Gas
 (in millions)
Revenue Recognized     
2019$30
$11
$6
$11
$2


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Remaining Performance Obligations
The traditional electric operating companies and Southern Power have long-term contracts with customers in which revenues are recognized as performance obligations are satisfied over the contract term. These contracts primarily relate to PPAs whereby the traditional electric operating companies and Southern Power provide electricity and generation capacity to a customer. The revenue recognized for the delivery of electricity is variable; however, certain PPAs include a fixed payment for fixed generation capacity over the term of the contract. Southern Company's unregulated distributed generation business also has partially satisfied performance obligations related to certain fixed price contracts. Revenues from contracts with customers related to these performance obligations remaining at December 31, 2019 are expected to be recognized as follows:
 202020212022202320242025 and
Thereafter
 (in millions)
Southern Company$490
$430
$336
$324
$323
$2,108
Alabama Power21
25
22
22
22
118
Georgia Power60
49
32
32
23
61
Southern Power287
280
281
271
279
1,948

Revenue expected to be recognized for performance obligations remaining at December 31, 2019 was immaterial for Mississippi Power.
5. PROPERTY, PLANT, AND EQUIPMENT
Property, plant, and equipment is stated at original cost or fair value at acquisition, as appropriate, less any regulatory disallowances and impairments. Original cost may include: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized and/or cost of equity funds used during construction.
The Registrants' property, plant, and equipment in service consisted of the following at December 31, 2019 and 2018:
At December 31, 2019:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas

(in millions)
Electric utilities:

     
Generation$50,329
$15,329
$18,341
$2,786
$13,241
$
Transmission12,157
4,719
6,590
808


Distribution19,846
7,798
11,024
1,024


General/other4,650
2,177
2,182
239
29

Electric utilities' plant in service86,982
30,023
38,137
4,857
13,270

Southern Company Gas:

     
Natural gas distribution utilities transportation and distribution13,518




13,518
Storage facilities1,634




1,634
Other1,192




1,192
Southern Company Gas plant in service16,344




16,344
Other plant in service1,788





Total plant in service$105,114
$30,023
$38,137
$4,857
$13,270
$16,344

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2018:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Electric utilities:      
Generation$52,324
$16,533
$19,145
$2,849
$13,246
$
Transmission11,344
4,380
6,156
769


Distribution18,746
7,389
10,389
968


General/other4,446
2,100
1,985
314
25

Electric utilities' plant in service86,860
30,402
37,675
4,900
13,271

Southern Company Gas:    

 
Natural gas distribution utilities transportation and distribution12,409




12,409
Storage facilities1,640




1,640
Other1,128




1,128
Southern Company Gas plant in service15,177




15,177
Other plant in service1,669





Total plant in service$103,706
$30,402
$37,675
$4,900
$13,271
$15,177

The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed with the exception of nuclear refueling costs and certain maintenance costs including those described below.
In accordance with orders from their respective state PSCs, Alabama Power and Georgia Power defer nuclear outage operations and maintenance expenses to a regulatory asset when the charges are incurred. Alabama Power amortizes the costs over a subsequent 18-month period with Plant Farley's fall outage cost amortization beginning in January of the following year and spring outage cost amortization beginning in July of the same year. Georgia Power amortizes its costs over each unit's operating cycle, or 18 months for Plant Vogtle Units 1 and 2 and 24 months for Plant Hatch Units 1 and 2.
A portion of Mississippi Power's railway track maintenance costs is charged to fuel stock and recovered through Mississippi Power's fuel clause.
The portion of Southern Company Gas' non-working gas used to maintain the structural integrity of natural gas storage facilities that is considered to be non-recoverable is depreciated, while the recoverable or retained portion is not depreciated.
Finance Leases
Assets acquired under a finance lease (previously referred to as a capital lease) are included in property, plant, and equipment and are further detailed in the table below for the applicable Registrants at December 31, 2018:
At December 31, 2018:Southern Company
Georgia
Power
 (in millions)
Office buildings$216
$61
PPAs(*)

144
Computer-related equipment43

Gas pipeline7

Less: Accumulated amortization(75)(84)
Balance, net of amortization$191
$121
(*)
Represents Georgia Power's affiliate PPAs with Southern Power. See Note 1 under "Affiliate Transactions" for additional information.
See Note 9 for additional information, including finance lease right-of-use (ROU) assets, net included in property, plant, and equipment at December 31, 2019.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Depreciation and Amortization
The traditional electric operating companies' and Southern Company Gas' depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates. The approximate rates for 2019, 2018, and 2017 are as follows:
 201920182017
Alabama Power3.1%3.0%2.9%
Georgia Power2.6%2.6%2.7%
Mississippi Power3.7%4.2%3.4%
Southern Company Gas2.9%2.9%2.9%

Depreciation studies are conducted periodically to update the composite rates. These studies are filed with the respective state PSC and/or other applicable state and federal regulatory agencies for the traditional electric operating companies and natural gas distribution utilities. Effective January 1, 2020, Georgia Power's and Atlanta Gas Light's depreciation rates were revised by the Georgia PSC in connection with their respective base rate cases. On November 26, 2019, an updated depreciation study was filed with the Mississippi PSC in conjunction with the Mississippi Power 2019 Base Rate Case requesting a $16 million increase in total annual depreciation. See Note 2 for additional information.
When property, plant, and equipment subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the asset are retired when the related property unit is retired.
At December 31, 2019 and 2018, accumulated depreciation for utility plant in service totaled $30.0 billion and $30.3 billion, respectively, for Southern Company and $4.5 billion and $4.3 billion, respectively, for Southern Company Gas.
Depreciation of the original cost of other plant in service is provided primarily on a straight-line basis over estimated useful lives, which for Southern Company range up to 65 years and for Southern Company Gas range from five to 15 years for transportation equipment, 40 to 60 years for storage facilities, and up to 65 years for other assets. At December 31, 2019 and 2018, accumulated depreciation for other plant in service totaled $732 million and $766 million, respectively, for Southern Company and $155 million and $129 million, respectively, for Southern Company Gas.
Southern Power
Southern Power applies component depreciation, where depreciation is computed principally by the straight-line method over the estimated useful life of the asset. Certain of Southern Power's generation assets related to natural gas-fired facilities are depreciated on a units-of-production basis, using hours or starts, to better match outage and maintenance costs to the usage of, and revenues from, these assets. The primary assets in Southern Power's property, plant, and equipment are generating facilities, which generally have estimated useful lives as follows:
Southern Power Generating FacilityUseful life
Natural gasUp to 45 years
Biomass(*)
Up to 40 years
SolarUp to 35 years
WindUp to 30 years

(*)
See Note 15 under "Southern PowerSales of Natural Gas and Biomass Plants" for information on Southern Power's sale of its biomass facility on June 13, 2019.
Southern Power reviews its estimated useful lives and salvage values on an ongoing basis. The results of these reviews could result in changes which could have a material impact on Southern Power's net income in the near term.
When Southern Power's depreciable property, plant, and equipment is retired, or otherwise disposed of in the normal course of business, the applicable cost and accumulated depreciation is removed and a gain or loss is recognized in the statements of income.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Joint Ownership Agreements
At December 31, 2019, the Registrants' percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation were as follows:
Facility (Type)
Percent
Ownership
 Plant in Service 
Accumulated
Depreciation
 CWIP
   (in millions)
Alabama Power       
Greene County (natural gas) Units 1 and 260.0%
(a) 
$182
 $71
 $1
Plant Miller (coal) Units 1 and 291.8
(b) 
2,058
 630
 65
        
Georgia Power       
Plant Hatch (nuclear)50.1%
(c) 
$1,316
 $603
 $40
Plant Vogtle (nuclear) Units 1 and 245.7
(c) 
3,565
 2,177
 96
Plant Scherer (coal) Units 1 and 28.4
(c) 
266
 94
 14
Plant Scherer (coal) Unit 375.0
(c) 
1,267
 492
 47
Plant Wansley (coal)53.5
(c) 
1,059
 367
 10
Rocky Mountain (pumped storage)25.4
(d) 
182
 139
 
        
Mississippi Power       
Greene County (natural gas) Units 1 and 240.0%
(a) 
$118
 $46
 $1
Plant Daniel (coal) Units 1 and 250.0
(e) 
750
 214
 11
        
Southern Company Gas       
Dalton Pipeline (natural gas pipeline)50.0%
(f) 
$271
 $10
 $
(a)Jointly owned by Alabama Power and Mississippi Power and operated and maintained by Alabama Power.
(b)Jointly owned with PowerSouth and operated and maintained by Alabama Power.
(c)Georgia Power owns undivided interests in Plants Hatch, Vogtle Units 1 and 2, Scherer, and Wansley in varying amounts jointly with one or more of the following entities: OPC, MEAG Power, Dalton, Florida Power & Light Company, JEA, and Gulf Power. Georgia Power has been contracted to operate and maintain the plants as agent for the co-owners and is jointly and severally liable for third party claims related to these plants.
(d)Jointly owned with OPC, which is the operator of the plant.
(e)
Jointly owned by Gulf Power and Mississippi Power. In accordance with the operating agreement, Mississippi Power acts as Gulf Power's agent with respect to the operation and maintenance of these units. See Note 3 under "Other MattersMississippi Power" for information regarding a commitment between Mississippi Power and Gulf Power to seek a restructuring of their 50% undivided ownership interests in Plant Daniel.
(f)Jointly owned with The Williams Companies, Inc., The Dalton Pipeline is a 115-mile natural gas pipeline that serves as an extension of the Transco natural gas pipeline system into northwest Georgia. Southern Company Gas leases its 50% undivided ownership for approximately $26 million annually for an initial term through 2042. The lessee is responsible for maintaining the pipeline during the lease term and for providing service to transportation customers under its FERC-regulated tariff.
Georgia Power also owns 45.7% of Plant Vogtle Units 3 and 4, which are currently under construction and had a CWIP balance of $5.8 billion at December 31, 2019. See Note 2 under "Georgia PowerNuclear Construction" for additional information.
The Registrants' proportionate share of their jointly-owned facility operating expenses is included in the corresponding operating expenses in the statements of income and each Registrant is responsible for providing its own financing.
Assets Subject to Lien
In October 2018, the Mississippi PSC approved executed agreements between Mississippi Power and its largest retail customer, Chevron Products Company (Chevron), for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets, with a lease receivable balance of $118 million at December 31, 2019, located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato to a subsidiary of Xcel. As of December 31, 2019, under the terms of the PPA and the expansion PPA for Plant Mankato, approximately $547 million of assets, primarily related to property, plant, and equipment, were subject to lien. See Note 15 under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
See Note 8 under "Secured Debt" for information regarding debt secured by certain assets of Georgia Power, Mississippi Power, and Southern Company Gas.
6. ASSET RETIREMENT OBLIGATIONS
AROs are computed as the present value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the cost of future removal activities. Each traditional electric operating company and natural gas distribution utility has received accounting guidance from its state PSC or applicable state regulatory agency allowing the continued accrual or recovery of other retirement costs for long-lived assets that it does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as regulatory liabilities and amounts to be recovered are reflected in the balance sheets as regulatory assets.
The ARO liabilities for the traditional electric operating companies primarily relate to facilities that are subject to the CCR Rule and the related state rules, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of nuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in Plant Hatch and Plant Vogtle Units 1 and 2). See "Nuclear Decommissioning" herein for additional information. The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and, for Mississippi Power, mine reclamation and water wells. The ARO liability for Southern Power primarily relates to Southern Power's solar and wind facilities, which are located on long-term land leases requiring the restoration of land at the end of the lease.
The traditional electric operating companies and Southern Company Gas also have identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these assets have not been recorded because the settlement timing for certain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the retirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
Southern Company and the traditional electric operating companies will continue to recognize in their respective statements of income allowed removal costs in accordance with regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability in the balance sheets as ordered by the various state PSCs.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the AROs included in the balance sheets are as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi Power
Southern Power(*)
 (in millions)
Balance at December 31, 2017$4,824
$1,709
$2,638
$174
$78
Liabilities incurred29

27

2
Liabilities settled(244)(55)(116)(35)
Accretion217
106
94
5
4
Cash flow revisions4,737
1,450
3,186
16

Reclassification to held for sale(169)



Balance at December 31, 2018$9,394
$3,210
$5,829
$160
$84
Liabilities incurred37

35
1
1
Liabilities settled(328)(127)(151)(35)
Accretion402
145
243
7
4
Cash flow revisions281
312
(172)57

Balance at December 31, 2019$9,786
$3,540
$5,784
$190
$89

(*)Included in other deferred credits and liabilities on Southern Power's consolidated balance sheets.
In June 2018, Alabama Power recorded an increase of approximately $1.2 billion to its AROs related to the CCR Rule. Mississippi Power also recorded an increase of approximately $11 million to its AROs related to an ash pond at Plant Greene County, which is jointly-owned with Alabama Power. The revised cost estimates were based on information from feasibility studies performed on ash ponds in use at plants operated by Alabama Power, including Plant Greene County. During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology.
Also in June 2018, Alabama Power completed an updated decommissioning cost site study for Plant Farley. The estimated cost of decommissioning based on the study resulted in an increase in Alabama Power's ARO liability of approximately $300 million. In December 2018, Georgia Power completed updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. The estimated cost of decommissioning based on the studies resulted in an increase in Georgia Power's ARO liability of approximately $130 million. See "Nuclear Decommissioning" below for additional information.
In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. During the second half of 2018, Georgia Power completed a strategic assessment related to its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. This assessment included engineering and constructability studies related to design assumptions for ash pond closures and advanced engineering methods. The results indicated that additional closure costs will be required to close these ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. These factors also impact the estimated timing of future cash outlays.
The 2018 reclassification of a portion of the ARO liability to liabilities held for sale by Southern Company represents the AROs related to Gulf Power. See Note 15 under "Southern Company" and "Assets Held for Sale" for additional information.
During 2019, Alabama Power recorded increases totaling approximately $312 million to its AROs primarily related to the CCR Rule and the related state rule based on management's completion of closure designs during the second and third quarters 2019 under the planned closure-in-place methodology for all but one of its ash pond facilities. During 2019, Mississippi Power recorded an increase of approximately $57 million to its AROs related to the CCR Rule, primarily associated with the ash pond facility at Plant Greene County, which is jointly owned with Alabama Power. The additional estimated costs to close these ash ponds under the planned closure-in-place methodology primarily relate to cost inputs from contractor bids, internal drainage and dewatering system designs, and increases in the estimated ash volumes. Alabama Power anticipates increasing the ARO for its remaining ash pond facility within the next nine months upon completion of a feasibility study and the related cost estimate, and the increase could be material.
During the second half of 2019, Georgia Power completed an assessment of its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. Cost estimates were revised to reflect further refined costs for

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

closure plans and updates to the timing of future cash outlays. As a result, in December 2019, Georgia Power recorded a decrease of approximately $174 million to its AROs related to the CCR Rule and the related state rule.
The cost estimates for AROs related to the CCR Rule and related state rules are based on information at December 31, 2019 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule and related state requirements for closure. The traditional electric operating companies expect to continue to update their cost estimates and ARO liabilities periodically as additional information related to these assumptions becomes available. Additionally, the closure designs and plans in the States of Alabama and Georgia are subject to approval by environmental regulatory agencies. Absent continued recovery of ARO costs through regulated rates, Southern Company's and the traditional electric operating companies' results of operations, cash flows, and financial condition could be materially impacted. The ultimate outcome of this matter cannot be determined at this time.
Nuclear Decommissioning
The NRC requires licensees of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. Alabama Power and Georgia Power have external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and state PSCs, as well as the IRS. While Alabama Power and Georgia Power are allowed to prescribe an overall investment policy to the Funds' managers, neither Southern Company nor its subsidiaries or affiliates are allowed to engage in the day-to-day management of the Funds or to mandate individual investment decisions. Day-to-day management of the investments in the Funds is delegated to unrelated third-party managers with oversight by the management of Alabama Power and Georgia Power. The Funds' managers are authorized, within certain investment guidelines, to actively buy and sell securities at their own discretion in order to maximize the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
Alabama Power and Georgia Power record the investment securities held in the Funds at fair value, as disclosed in Note 13, as management believes that fair value best represents the nature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value adjustments and realized gains and losses are determined on a specific identification basis.
The Funds at Georgia Power participate in a securities lending program through the managers of the Funds. Under this program, Georgia Power's Funds' investment securities are loaned to institutional investors for a fee. Securities loaned are fully collateralized by cash, letters of credit, and/or securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. At December 31, 2019 and 2018, approximately $28 million and $27 million, respectively, of the fair market value of Georgia Power's Funds' securities were on loan and pledged to creditors under the Funds' managers' securities lending program. The fair value of the collateral received was approximately $29 million and $28 million at December 31, 2019 and 2018, respectively, and can only be sold by the borrower upon the return of the loaned securities. The collateral received is treated as a non-cash item in the statements of cash flows.
Investment securities in the Funds for December 31, 2019 and 2018 were as follows:
 Southern Company
Alabama
Power
Georgia
Power
 (in millions)
At December 31, 2019:   
Equity securities$1,159
$743
$416
Debt securities798
218
580
Other securities77
60
17
Total investment securities in the Funds$2,034
$1,021
$1,013
    
At December 31, 2018:   
Equity securities$919
$594
$325
Debt securities726
201
525
Other securities74
51
23
Total investment securities in the Funds$1,719
$846
$873

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

These amounts exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases. For Southern Company and Georgia Power, these amounts include Georgia Power's investment securities pledged to creditors and collateral received and excludes payables related to Georgia Power's securities lending program.
The fair value increases (decreases) of the Funds, including unrealized gains (losses) and reinvested interest and dividends and excluding the Funds' expenses, for 2019, 2018, and 2017 are shown in the table below.
 Southern Company
Alabama
Power
Georgia
Power
 (in millions)
Fair value increases (decreases)   
2019$344
$194
$150
2018(67)(38)(29)
2017233
125
108
    
Unrealized gains (losses)   
At December 31, 2019$259
$149
$110
At December 31, 2018(183)(96)(87)
At December 31, 2017181
98
83
The investment securities held in the Funds continue to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.
For Alabama Power, approximately $16 million and $17 million at December 31, 2019 and 2018, respectively, previously recorded in internal reserves is being transferred into the Funds through 2040 as approved by the Alabama PSC. The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. Alabama Power and Georgia Power have filed plans with the NRC designed to ensure that, over time, the deposits and earnings of the Funds will provide the minimum funding amounts prescribed by the NRC.
At December 31, 2019 and 2018, the accumulated provisions for the external decommissioning trust funds were as follows:
 2019 2018
 (in millions)
Alabama Power   
Plant Farley$1,021
 $846
    
Georgia Power   
Plant Hatch$634
 $547
Plant Vogtle Units 1 and 2379
 326
Total$1,013
 $873

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Site study cost is the estimate to decommission a specific facility as of the site study year. The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may invest upvary from these estimates because of changes in the assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates. The estimated costs of decommissioning at December 31, 2019 based on the most current studies, which were each performed in 2018, were as follows:
 
Plant
Farley
 
Plant
 Hatch(*)
 
Plant Vogtle
 Units 1 and 2(*)
Decommissioning periods:     
Beginning year2037
 2034
 2047
Completion year2076
 2075
 2079
 (in millions)
Site study costs:     
Radiated structures$1,234
 $734
 $601
Spent fuel management387
 172
 162
Non-radiated structures99
 56
 79
Total site study costs$1,720
 $962
 $842
(*)Based on Georgia Power's ownership interests.
For ratemaking purposes, Alabama Power's decommissioning costs are based on the site study and Georgia Power's decommissioning costs are based on the NRC generic estimate to $35 million annually through 2021. Additionally, Virginia Natural Gas may exceeddecommission the allowed program expenditures by upradioactive portion of the facilities and the site study estimate for spent fuel management as of 2018. Significant assumptions used to determine these costs for ratemaking were an estimated inflation rate of 4.5% and 2.75% for Alabama Power and Georgia Power, respectively, and an estimated trust earnings rate of 7.0% and 4.75% for Alabama Power and Georgia Power, respectively.
Amounts previously contributed to the Funds for Plant Farley are currently projected to be adequate to meet the decommissioning obligations. Alabama Power will continue to provide site-specific estimates of the decommissioning costs and related projections of funds in the external trust to the Alabama PSC and, if necessary, would seek the Alabama PSC's approval to address any changes in a manner consistent with NRC and other applicable requirements.
Under the 2013 ARP, Georgia Power's annual decommissioning cost for ratemaking was a total of $5 million for Plant Hatch and Plant Vogtle Units 1 and 2. Effective January 1, 2020, in connection with the 2019 ARP, this total annual amount was reduced to $4 million. See Note 2 under "Georgia PowerRate Plans2019 ARP" for additional information.
7. CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS
The Registrants may hold ownership interests in a number of business ventures with varying ownership structures. Partnership interests and other variable interests are evaluated to determine if each entity is a VIE. If a venture is a VIE for which a Registrant is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. The Registrants reassess the conclusion as to whether an entity is a VIE upon certain occurrences, which are deemed reconsideration events.
For entities that are not determined to be VIEs, the Registrants evaluate whether they have control or significant influence over the investee to determine the appropriate consolidation and presentation. Generally, entities under the control of a Registrant are consolidated, and entities over which a Registrant can exert significant influence, but which a Registrant does not control, are accounted for under the equity method of accounting. However, the Registrants may also invest in partnerships and limited liability companies that maintain separate ownership accounts. All such investments are required to be accounted for under the equity method unless the interest is so minor that there is virtually no influence over operating and financial policies, as are all investments in joint ventures.
Investments accounted for under the equity method are recorded within equity investments in unconsolidated subsidiaries in the balance sheets and, for Southern Company and Southern Company Gas, the equity income is recorded within earnings from equity method investments in the statements of income. See "SEGCO" and "Southern Company Gas" herein for additional information.
SEGCO
Alabama Power and Georgia Power own equally all of the outstanding capital stock of SEGCO, which owns electric generating units with a total rated capacity of 1,020 MWs, as well as associated transmission facilities. Alabama Power and Georgia Power

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

account for SEGCO using the equity method; Southern Company consolidates SEGCO. The capacity of these units is sold equally to Alabama Power and Georgia Power. Alabama Power and Georgia Power make payments sufficient to provide for the operating expenses, taxes, interest expense, and a ROE. The share of purchased power included in purchased power, affiliates in the statements of income totaled $93 million in 2019, $102 million in 2018, and $76 million in 2017 for Alabama Power and $95 million in 2019, $105 million in 2018, and $78 million in 2017 for Georgia Power.
SEGCO paid $14 million of dividends in 2019, $18 million in 2018, and $24 million in 2017, of which $2 millionone-half of each was used in 2016. During 2017, Virginia Natural Gas expectspaid to invest $35 million under this program.each of Alabama Power and Georgia Power. In addition, Alabama Power and Georgia Power each recognize 50% of SEGCO's net income.
Florida City GasAlabama Power, which owns and operates a generating unit adjacent to the SEGCO generating units, has a joint ownership agreement with SEGCO for the ownership of an associated gas pipeline. Alabama Power owns 14% of the pipeline with the remaining 86% owned by SEGCO.
In September 2015, the Florida PSC approved Florida City Gas' SAFE program, under which costs incurred for replacing aging pipes will be recovered through a rate rider with annual adjustments and true-ups. Under the program, Florida City Gas is authorized to spend $105 million over a 10-year period on infrastructure relocation and enhancement projects. During 2017, Florida City Gas expects to invest $10 million under this program.
See Note 3 to the financial statements under "Regulatory MattersGuarantees" for additional information regarding rate mechanismsguarantees of Alabama Power and Georgia Power related to SEGCO.
Southern Power
Variable Interest Entities
Southern Power has certain subsidiaries that are determined to be VIEs. Southern Power is considered the primary beneficiary of these VIEs because it controls the most significant activities of the VIEs, including operating and maintaining the respective assets, and has the obligation to absorb expected losses of these VIEs to the extent of its equity interests.
SP Solar and SP Wind
In May 2018, Southern Power sold a noncontrolling 33% limited partnership interest in SP Solar to Global Atlantic Financial Group Limited (Global Atlantic). See Note 15 under "Southern Power" for additional information. A wholly-owned subsidiary of Southern Power is the general partner and holds a 1% ownership interest in SP Solar and another wholly-owned subsidiary of Southern Power owns the remaining 66% ownership in SP Solar. SP Solar qualifies as a VIE since the arrangement is structured as a limited partnership and the 33% limited partner does not have substantive kick-out rights against the general partner.
At December 31, 2019 and 2018, SP Solar had total assets of $6.4 billion and $6.3 billion, respectively, total liabilities of $381 million and $113 million, respectively, and noncontrolling interests of $1.1 billion and $1.2 billion, respectively. Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with their partnership interest percentage. Under the terms of the limited partnership agreement, distributions without limited partner consent are limited to available cash and SP Solar is obligated to distribute all such available cash to its partners each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves.
In December 2018, Southern Power sold a noncontrolling tax-equity interest in SP Wind to 3 financial investors. SP Wind owns 8 operating wind farms. See Note 15 under "Southern Power" for additional information. Southern Power owns 100% of the Class B membership interests and the 3 financial investors own 100% of the Class A membership interests. SP Wind qualifies as a VIE since the structure of the arrangement is similar to a limited partnership and the Class A members do not have substantive kick-out rights against Southern Power.
At December 31, 2019 and 2018, SP Wind had total assets of $2.5 billion and $2.5 billion, respectively, total liabilities of $128 million and $51 million, respectively, and noncontrolling interests of $45 million and $47 million, respectively. Under the terms of the limited liability agreement, distributions without Class A member consent are limited to available cash and SP Wind is obligated to distribute all such available cash to its members each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves. Cash distributions from SP Wind are generally allocated 60% to Southern Power and 40% to the 3 financial investors in accordance with the limited liability agreement.
Southern Power consolidates both SP Solar and SP Wind, as the primary beneficiary, since it controls the most significant activities of each entity, including operating and maintaining their assets. Certain transfers and sales of the assets in the VIEs are subject to partner consent and the liabilities are non-recourse to the general credit of Southern Power. Liabilities consist of customary working capital items and do not include any long-term debt.
Other Variable Interest Entities
Southern Power has other consolidated VIEs that relate to certain subsidiaries that have either sold noncontrolling interests to tax-equity investors or acquired less than a 100% interest from facility developers. These entities are considered VIEs because the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

arrangements are structured similar to a limited partnership and the noncontrolling members do not have substantive kick-out rights.
At December 31, 2019 and 2018, the other VIEs had total assets of $1.1 billion and $858 million, respectively, total liabilities of $104 million and $80 million, respectively, and noncontrolling interests of $409 million and $241 million, respectively. Under the terms of the partnership agreements, distributions of all available cash are required each month or quarter and additional distributions require partner consent.
In August 2019, Southern Power completed the acquisition of a majority interest in DSGP and gained control of its most significant activities. As a result, Southern Power became the primary beneficiary of this VIE and began accounting orders.for it as a consolidated entity. Upon consolidation of DSGP, Southern Power recorded an additional $107 million in assets, $51 million in liabilities, and $56 million in noncontrolling interest. There was 0 cash transferred as a result of this consolidation. From the date of Southern Power's first investment in June 2019 until gaining control in August 2019, Southern Power applied the equity method of accounting. See Note 15 under "Southern Power" for additional information.
Equity Method Investments
At December 31, 2019, Southern Power had equity method investments in several wind and battery storage projects totaling $28 million.
Natural Gas Cost Recovery
The Company has establishedWith the exception of Atlanta Gas Light, the natural gas cost recovery rates thatdistribution utilities are approvedauthorized by the relevant regulatory agencies ofin the states in which it serves.they serve to use natural gas cost recovery mechanisms that adjust rates to reflect changes in the wholesale cost of natural gas and ensure recovery of all costs prudently incurred in purchasing natural gas for customers. Natural gas cost recovery revenues are adjusted for differences in actual recoverable natural gas costs and amounts billed in current regulated rates. Accordingly, changesChanges in the billing factor will not have a significant effect on theSouthern Company's or Southern Company Gas' revenues or net income, but will affect cash flows. See Note 3At December 31, 2019 and 2018, the over recovered balances were $74 million and

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

$15 million, respectively, which were included in other regulatory liabilities on Southern Company's and Southern Company Gas' balance sheets.
Rate Proceedings
Nicor Gas
In January 2018, the Illinois Commission approved a $137 million increase in annual base rate revenues, including $93 million related to the financial statementsrecovery of investments under "Regulatory Matters"the Investing in Illinois program, effective in February 2018, based on a ROE of 9.8%. In May 2018, the Illinois Commission approved Nicor Gas' rehearing request for additional information.
Base Rate Cases
On December 5, 2016, Atlanta Gas Light filedrevised base rates to incorporate the reduction in the federal income tax rate as a joint stipulation with the staffresult of the Georgia PSC seeking an annual rate review/adjustment mechanism, GRAM. This new mechanism will adjust rates up or down annually and will not collect revenue through special riders and surcharges for the STRIDE infrastructure programs. Also in this filing, Atlanta Gas Light requested an adjustment in base rates designed to collect an additional $20Tax Reform Legislation. The resulting decrease of approximately $44 million in annual revenues effective March 2017. On February 21, 2017, the Georgia PSC approved the joint stipulation and requested base rate adjustment.revenues became effective May 5, 2018. The benefits of the Tax Reform Legislation from January 25, 2018 through May 4, 2018 were refunded to customers via bill credits and concluded in the second quarter 2019.
On September 1, 2016, ElizabethtownIn November 2018, Nicor Gas filed a general base rate case with the New Jersey BPU as requiredIllinois Commission. On October 2, 2019, the Illinois Commission approved a $168 million annual base rate increase effective October 8, 2019. The base rate increase included $65 million related to the recovery of program costs under the Investing in Illinois program and was based on a ROE of 9.73% and an equity ratio of 54.2%. Additionally, the Illinois Commission approved a volume balancing adjustment, a revenue decoupling mechanism for residential customers that provides a monthly benchmark level of revenue per rate class for recovery.
Atlanta Gas Light
In February 2018, Atlanta Gas Light revised its AIRannual base rate filing to reflect the impacts of the Tax Reform Legislation and requested a $16 million rate reduction. In May 2018, the Georgia PSC approved a stipulation for Atlanta Gas Light's annual base rates to remain at the 2017 level for 2018 and 2019, with customer credits of $8 million in each of July 2018 and October 2018 to reflect the impacts of the Tax Reform Legislation. The Georgia PSC maintained Atlanta Gas Light's previously authorized earnings band based on a ROE between 10.55% and 10.95% and increased the allowed equity ratio by 4% to an equity ratio of 55% to address the negative cash flow and credit metric impacts of the Tax Reform Legislation.
On June 3, 2019, Atlanta Gas Light filed a general base rate case with the Georgia PSC. On December 19, 2019, the Georgia PSC approved a $65 million annual base rate increase, effective January 1, 2020, based on a ROE of 10.25% and an equity ratio of 56%. Earnings will be evaluated against a ROE range of 10.05% to 10.45%, with disposition of any earnings above 10.45% to be determined by the Georgia PSC. Additionally, the Georgia PSC approved continuation of the previously authorized inclusion in base rates of the recovery of and return on the infrastructure program requestinginvestments, including, but not limited to, GRAM adjustments, and a reauthorization and continuation of GRAM until terminated by the Georgia PSC. GRAM filing rate adjustments will be based on the authorized ROE of 10.25%. GRAM adjustments for 2021 may not exceed 5% of 2020 base rates. The 5% limitation does not set a precedent in any future rate proceedings by Atlanta Gas Light.
On January 31, 2020, in accordance with the Georgia PSC's order for the 2019 rate case, Atlanta Gas Light filed a recommended notice of proposed rulemaking for a long-range planning tool. The proposal provides for participating natural gas utilities to file a comprehensive capacity supply and related infrastructure delivery plan for a 10-year period, including capital and related operations and maintenance expense budgets. Participating natural gas utilities would file an updated 10-year plan at least once every third year under the proposal. Related costs of implementing an approved comprehensive plan would be included in the utility's next rate case or GRAM filing. The rulemaking process is expected to be completed during 2020.
Virginia Natural Gas
In 2017, the Virginia Commission approved a settlement for a $34 million increase in annual base rate revenues, effective September 1, 2017, including $13 million related to the recovery of $19investments under the SAVE program. See "Infrastructure Replacement Programs and Capital Projects" herein for additional information. An authorized ROE range of 9.0% to 10.0% with a midpoint of 9.5% will be used to determine the revenue requirement in any filing, other than for a change in base rates.
In December 2018, the Virginia Commission approved Virginia Natural Gas' annual information form filing, which reduced annual base rates by $14 million based on an allowed ROEeffective January 1, 2019 due to lower tax expense as a result of 10.25%. The Company expects the New Jersey BPUTax Reform Legislation, along with customer refunds, via bill credits, for $14 million related to issue an order on the filing2018 tax benefits deferred as a regulatory liability at December 31, 2018. These customer refunds were completed in the thirdfirst quarter 2017.2019.
On December 13, 2016,February 3, 2020, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required at least 60 days prior to the filing of a general base rate case.
case, which will occur between April 3, 2020 and April 30, 2020. The ultimate outcome of these mattersthis matter cannot be determined at this time.
Asset Management Agreements
Six of the Company's utilities use asset management agreements with the Company's wholly-owned subsidiary, Sequent, for the primary purpose of reducing utility customers' gas cost recovery rates through payments to the utilities by Sequent. Nicor Gas has not entered into an asset management agreement with Sequent or any other parties. For Atlanta Gas Light, these payments are controlled by the Georgia PSC and are utilized for infrastructure improvements and to fund heating assistance programs, rather than as a reduction to gas cost recovery rates. Under these asset management agreements, Sequent supplies natural gas to the utility and markets available pipeline and storage capacity to improve the overall cost of supplying gas to the utility customers. Currently, the Company's utilities primarily purchase their gas from Sequent. The purchase agreements require Sequent to provide firm gas to the Company's utilities, but these utilities maintain the right and ability to make their own gas supply purchases. This right allows the Company's utilities to make long-term supply arrangements if they believe it is in the best interest of their customers.
Each agreement provides for Sequent to make payments to the utilities through either an annual minimum guarantee within a profit sharing structure, a profit sharing structure without an annual minimum guarantee, or a fixed fee. From the inception of


MANAGEMENT'S DISCUSSION AND ANALYSISCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


these agreements in 2001 through December 31, 2016, Sequent made sharing payments to the Company's utilities under these agreements totaling $367 million. On April 14, 2016, as part of its approval order for the Merger, the Georgia PSC approved an extension of Atlanta Gas Light's asset management agreement with Sequent to March 31, 2020.
The following table provides payments made by Sequent to the Company's utilities under these agreements during the last three years:
 Successor  Predecessor
 Total Amount Received  Total Amount Received 
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,  
 2016  2016 2015 2014 Expiration Date
 (in millions)  (in millions)  
Elizabethtown Gas$3
  $12
 $28
 $18
 Mar-19
Virginia Natural Gas2
  9
 15
 14
 Mar-18
Atlanta Gas Light1
  6
 15
 13
 Mar-20
Florida City Gas
  1
 1
 1
 
(*) 
Chattanooga Gas
  1
 1
 1
 Mar-18
Total$6
  $29
 $60
 $47
  
(*) The agreement renews automatically each year unless terminated by either party.
PRP Settlement
In October 2015, Atlanta Gas Light received a final order from the Georgia PSC, which represented a resolution of all matters previously outstanding before the Georgia PSC, including a final determination of the true-up of allowed unrecovered revenue through December 2014. This order allows Atlanta Gas Light to recover $144 million of the $178 million unrecovered program revenue that was requested in its February 2015 filing. The remaining unrecovered amount related primarily to the previously unrecognized ratemaking amount and did not have a material impact on the Company's consolidated financial statements. The Company also recognized $1 million of interest expense and $5 million in operations and maintenance expense related to the PRP on the Company's consolidated statements of income for the predecessor year ended December 31, 2015. See "Unrecognized Ratemaking Amounts" herein for additional information.
Atlanta Gas Light began recovering $144 million in October 2015 through the monthly PRP surcharge of $0.82, or approximately $15 million annually, which increased by $0.81 on October 1, 2016. The monthly PRP surcharge is scheduled to increase by another $0.81 on October 1, 2017. As part of the Georgia PSC's approval, this increase will commence earlier with its implementation under GRAM. The PRP surcharge will remain effective until the earlier of the full recovery of the under-recovered amount or December 31, 2025. See "Base Rate Cases" herein for additional information on GRAM.
One of the capital projects under the PRP experienced construction issues and Atlanta Gas Light was required to complete mitigation work prior to placing it in service. These mitigation costs will be included in future base rates in 2018. Provisions in the order resulted in the recognition of $5 million in operations and maintenance expense for the year ended December 31, 2015 on the Company's consolidated statements of income. Atlanta Gas Light continues to pursue contractual and legal claims against certain third-party contractors and will retain any amounts recorded.
Gas Cost Prudence Review
In 2014, the Illinois Commission staff and the CUB filed testimony in the Nicor Gas 2003 gas cost prudence review disputing certain gas loan transactions offered by Nicor Gas under its Chicago Hub services and requesting refunds of $18 million and $22 million, respectively. On February 10, 2016, the administrative law judge issued a proposed order affirming an original order by the Illinois Commission, which was approved by the Illinois Commission on March 23, 2016 and concluded this matter. The Illinois Commission approved the purchase gas adjustments for the years 2004 through 2007 on August 9, 2016 and for the years 2008 and 2009 on August 24, 2016. As a condition of these approvals, Nicor Gas agreed to revise the way in which interest is reflected in the calculations beginning in 2013. The Company does not expect this revision to have a material impact on its consolidated financial statements. The gas cost prudence reviews for years 2010 through 2015 are underway. The ultimate outcome of these matters cannot be determined at this time.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


energySMART
In 2014, the Illinois Commission approved Nicor Gas' energySMART, which outlines energy efficiency program offerings and therm reduction goals with spending of $93 million over a three-year period that began in 2014. On December 7, 2016, new energy legislation was signed in Illinois that extended the current program through December 31, 2017, with a new total expenditure of approximately $110 million.
Unrecognized Ratemaking Amounts
The following table illustrates the Company'sSouthern Company Gas' authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain of the Company's regulatory infrastructure programs. These amounts will be recognized as revenues in the Company's consolidatedSouthern Company Gas' financial statements in the periods they are billable to customers.customers, the majority of which will be recovered by 2025.
 December 31, 2019 December 31, 2018
 (in millions)
Atlanta Gas Light$70
 $95
Virginia Natural Gas10
 11
Nicor Gas2
 4
Total$82
 $110

 Successor  Predecessor
 December 31, 2016  December 31, 2015
 (in millions)  (in millions)
Atlanta Gas Light$110
  $103
Virginia Natural Gas11
  12
Elizabethtown Gas6
  4
Nicor Gas2
  3
Total$129
  $122
Income Tax Matters3. CONTINGENCIES, COMMITMENTS, AND GUARANTEES
Bonus Depreciation
In December 2015, the Protecting Americans from Tax Hikes (PATH) Act was signed into law. Bonus depreciation was extended for qualified property placed in service through 2020. The PATH Act allows for 50% bonus depreciation for 2015 through 2017, 40% bonus depreciation for 2018, and 30% bonus depreciation for 2019 and certain long-lived assets placed in service in 2020. The extension of bonus depreciation included in the PATH Act is expected to result in approximately $60 million of positive cash flows for the 2016 tax year, which was not all realized in 2016 due to a projected consolidated net operating loss for Southern Company. Approximately $260 million of positive cash flows is expected to result from bonus depreciation for the 2017 tax year, but may not be realized in 2017 due to the additional net operating loss projections for the 2017 tax year. The ultimate outcome of this matter cannot be determined at this time.
OtherGeneral Litigation Matters
The Company isRegistrants are involved in various other matters being litigated and regulatory matters that could affect future earnings. In addition, the Company is subject to certain claims and legal actions arising in the ordinary course of business.
Nicor Gas and Nicor Energy Services Company, wholly-owned subsidiaries of the Company, and Nicor Inc. are defendants in a putative class action initially filed in 2011 in state court in Cook County, Illinois. The plaintiffs purport to represent a class of the customers who purchased the Gas Line Comfort Guard product from Nicor Energy Services Company and variously allege that the marketing, sale, and billing of the Gas Line Comfort Guard product violated the Illinois Consumer Fraud and Deceptive Business Practices Act, constituting common law fraud and resulting in unjust enrichment of these entities. The plaintiffs seek, on behalf of the classes they purport to represent, actual and punitive damages, interest, costs, attorney fees, and injunctive relief. On February 8, 2017, the judge denied the plaintiffs' motion for class certification and the Company's motion for summary judgment.matters. The ultimate outcome of this matter cannot be determined at this time.
The Company is assessing its alleged involvement in an incident that occurred in one of its service territories that resulted in several deaths, injuries, and property damage. One of the Company's utilities has been named as one of the defendants in several lawsuits related to this incident. The Company has insurance that provides full coverage of any financial exposure in excess of $11 million related to this incident. During the successor period ended December 31, 2016 and the predecessor period ended December 31, 2015, the Company recorded reserves for substantially all of its potential exposure from these cases. The ultimate outcome of this matter cannot be determined at this time.
The ultimate outcome of these matters and such pending or potential litigation or regulatory matters against the Companyeach Registrant and any subsidiaries cannot be predicteddetermined at this time; however, for current proceedings not specifically reported herein, or in Note 3 to the financial statements, management does

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company'ssuch Registrant's financial statements. See Note 3 to
The Registrants believe the financial statements under "General Litigation Matters" for a discussionpending legal challenges discussed below have no merit; however, the ultimate outcome of various other contingencies, regulatorythese matters and other matters being litigated which may affect future earnings potential.cannot be determined at this time.
ACCOUNTING POLICIESSouthern Company
ApplicationIn January 2017, a securities class action complaint was filed against Southern Company, certain of Critical Accounting Policiesits officers, and Estimatescertain former Mississippi Power officers in the U.S. District Court for the Northern District of Georgia by Monroe County Employees' Retirement System on behalf of all persons who purchased shares of Southern Company's common stock between April 25, 2012 and October 29, 2013. The complaint alleges that Southern Company, certain of its officers, and certain former Mississippi Power officers made materially false and misleading statements regarding the Kemper County energy facility in violation of certain provisions under the Securities Exchange Act of 1934, as amended. The complaint seeks, among other things, compensatory damages and litigation costs and attorneys' fees. In 2017, the plaintiffs filed an amended complaint that provided additional detail about their claims, increased the purported class period by one day, and added certain other former Mississippi Power officers as defendants. Also in 2017, the defendants filed a motion to dismiss the plaintiffs' amended complaint with prejudice, to which the plaintiffs filed an opposition. In March 2018, the court issued an order granting, in part, the defendants' motion to dismiss. The court dismissed certain claims against certain officers of Southern Company and Mississippi Power and dismissed the allegations related to a number of the statements that plaintiffs challenged as being false or misleading. In April 2018, the defendants filed a motion for reconsideration of the court's order, seeking dismissal of the remaining claims in the lawsuit. In August 2018, the court denied the motion for reconsideration and denied a motion to certify the issue for interlocutory appeal. On August 22, 2019, the court certified the plaintiffs' proposed class. On September 5, 2019, the defendants filed a petition for interlocutory appeal of the class certification order with the U.S. Court of Appeals for the Eleventh Circuit. On December 19, 2019, the U.S. District Court for the Northern District of Georgia entered an order staying all deadlines in the case pending mediation. The stay automatically expires on March 31, 2020.
In February 2017, Jean Vineyard and Judy Mesirov each filed a shareholder derivative lawsuit in the U.S. District Court for the Northern District of Georgia. Each of these lawsuits names as defendants Southern Company, certain of its directors, certain of its officers, and certain former Mississippi Power officers. In 2017, these two shareholder derivative lawsuits were consolidated in the U.S. District Court for the Northern District of Georgia. The complaints allege that the defendants caused Southern Company preparesto make false or misleading statements regarding the Kemper County energy facility cost and schedule. Further, the complaints allege that the defendants were unjustly enriched and caused the waste of corporate assets and also allege that the individual defendants violated their fiduciary duties. Each plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and, on each plaintiff's own behalf, attorneys' fees and costs in bringing the lawsuit. Each plaintiff also seeks certain changes to Southern Company's corporate governance and internal processes. In April 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In May 2017, Helen E. Piper Survivor's Trust filed a shareholder derivative lawsuit in the Superior Court of Gwinnett County, Georgia that names as defendants Southern Company, certain of its financialdirectors, certain of its officers, and certain former Mississippi Power officers. The complaint alleges that the individual defendants, among other things, breached their fiduciary duties in connection with schedule delays and cost overruns associated with the construction of the Kemper County energy facility. The complaint further alleges that the individual defendants authorized or failed to correct false and misleading statements regarding the Kemper County energy facility schedule and cost and failed to implement necessary internal controls to prevent harm to Southern Company. The plaintiff seeks to recover, on behalf of Southern Company, unspecified actual damages and disgorgement of profits and, on its behalf, attorneys' fees and costs in accordance with GAAP. Significant accounting policiesbringing the lawsuit. The plaintiff also seeks certain unspecified changes to Southern Company's corporate governance and internal processes. In May 2018, the court entered an order staying this lawsuit until 30 days after the resolution of any dispositive motions or any settlement, whichever is earlier, in the securities class action. On August 5, 2019, the court granted a motion filed by the plaintiff on July 17, 2019 to substitute a new named plaintiff, Martin J. Kobuck, in place of Helen E. Piper Survivor's Trust.
Georgia Power
In 2011, plaintiffs filed a putative class action against Georgia Power in the Superior Court of Fulton County, Georgia alleging that Georgia Power's collection in rates of amounts for municipal franchise fees (which fees are describedpaid to municipalities) exceeded the amounts allowed in Note 1orders of the Georgia PSC and alleging certain state tort law claims. In 2016, the Georgia Court of Appeals reversed the trial court's previous dismissal of the case and remanded the case to the financial statements.trial court. Georgia Power filed a petition for writ of certiorari with the Georgia Supreme Court, which was granted in 2017. In June 2018, the Georgia Supreme Court affirmed the judgment of the Georgia Court of Appeals and remanded the case to the trial court for further proceedings. Following a motion by Georgia Power, on February 13, 2019, the Superior Court of Fulton County ordered the parties to submit petitions to the Georgia PSC for a declaratory ruling to address certain terms the court previously held were ambiguous as used in the Georgia PSC's orders. The order entered by the Superior Court of Fulton County also conditionally certified the proposed class. In March 2019, Georgia Power and the plaintiffs filed petitions with the Georgia PSC seeking confirmation of the proper application of the municipal franchise fee schedule pursuant to the Georgia PSC's orders. On October 23, 2019, the Georgia PSC issued an order that found and concluded that Georgia Power has appropriately implemented the municipal franchise fee schedule. On March 6, 2019, Georgia Power filed a notice of appeal with the Georgia Court of Appeals regarding the Superior Court of Fulton County's February 2019 order. The amount of any possible losses cannot be calculated at this time because, among other factors, it is unknown whether conditional class certification will be upheld and the ultimate composition of any class and whether any losses would be subject to recovery from any municipalities.
Mississippi Power
In May 2018, Southern Company and Mississippi Power received a notice of dispute and arbitration demand filed by Martin Product Sales, LLC (Martin) based on 2 agreements, both related to Kemper IGCC byproducts for which Mississippi Power provided termination notices in 2017. Martin alleges breach of contract, breach of good faith and fair dealing, fraud and misrepresentation, and civil conspiracy and makes a claim for damages in the amount of approximately $143 million, as well as additional unspecified damages, attorney's fees, costs, and interest. A portion of the claim for damages was on behalf of Martin Transport, Inc. (Martin Transport), an affiliate of Martin. In the applicationfirst quarter 2019, Mississippi Power and Southern Company filed motions to dismiss, which were denied by the arbitration panel on May 10, 2019. On September 27, 2019, Martin Transport filed a separate complaint against Mississippi Power in the Circuit Court of these policies, certain estimates are madeKemper County, Mississippi alleging claims of fraud, negligent misrepresentation, promissory estoppel, and equitable estoppel, each arising out of the same alleged facts and circumstances that mayunderlie Martin's arbitration demand. Martin Transport seeks compensatory damages of $5 million and punitive damages of $50 million. In November 2019, Martin Transport's claim was combined with the Martin arbitration case and the separate court case was dismissed. On December 16, 2019, Southern Company and Mississippi Power each filed motions for summary judgment on all claims. On February 17, 2020, the arbitration panel granted Southern Company's motion and dismissed Southern Company from the arbitration. An adverse outcome in this proceeding could have a material impact on Southern Company's and Mississippi Power's financial statements.
In November 2018, Ray C. Turnage and 10 other individual plaintiffs filed a putative class action complaint against Mississippi Power and 3 members of the Company's resultsMississippi PSC in the U.S. District Court for the Southern District of operationsMississippi. Mississippi Power received Mississippi PSC approval in 2013 to charge a mirror CWIP rate premised upon including in its rate base pre-construction and construction costs for the Kemper IGCC prior to placing the Kemper IGCC into service. The Mississippi Supreme Court reversed that approval and ordered Mississippi Power to refund the amounts paid by customers under the previously-approved mirror CWIP rate. The plaintiffs allege that the initial approval process, and the amount approved, were improper. They also allege that Mississippi Power underpaid customers by up to $23.5 million in the refund process by applying an incorrect interest rate. The plaintiffs seek to recover, on behalf of themselves and their putative class, actual damages, punitive

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

damages, pre-judgment interest, post-judgment interest, attorney's fees, and costs. In response to Mississippi Power and the Mississippi PSC each filing a motion to dismiss, the plaintiffs filed an amended complaint on March 14, 2019. The amended complaint included 4 additional plaintiffs and additional claims for gross negligence, reckless conduct, and intentional wrongdoing. Mississippi Power and the Mississippi PSC have each filed a motion to dismiss the amended complaint. An adverse outcome in this proceeding could have a material impact on Mississippi Power's financial statements.
See Note 2 under "Kemper County Energy Facility" for additional information.
Southern Power
Southern Power indirectly owns a 51% membership interest in RE Roserock LLC (Roserock), the owner of the Roserock facility in Pecos County, Texas. Prior to the facility being placed in service in 2016, certain solar panels were damaged during installation by the construction contractor, McCarthy Building Companies, Inc. (McCarthy), and certain solar panels were damaged by a hail event that also occurred during construction. In connection therewith, Southern Power withheld payment of approximately $26 million to the construction contractor, which placed a lien on the Roserock facility for the same amount. In 2017, Roserock filed a lawsuit in the state district court in Pecos County, Texas against XL Insurance America, Inc. and North American Elite Insurance Company seeking recovery from an insurance policy for damages resulting from the hail event and McCarthy's installation practices. In June 2018, the court granted Roserock's motion for partial summary judgment, finding that the insurers were in breach of contract and in violation of the Texas Insurance Code for failing to pay any monies owed for the hail claim. Separate lawsuits were filed between Roserock and McCarthy, as well as other parties, and that litigation was consolidated in the U.S. District Court for the Western District of Texas. On April 18, 2019, Roserock and the parties to the state and federal lawsuits executed a settlement agreement and mutual release that resolved both lawsuits. Following execution of the agreement, the lawsuits were dismissed, Southern Power paid McCarthy the amounts previously withheld, and McCarthy released its lien. As part of the settlement, Roserock received funds that covered all related disclosures. Different assumptionslegal costs, damages, and measurementsthe replacement costs of certain solar panels. Funds received by Southern Power in excess of the initial replacement costs were recognized as a gain and included in other income (expense), net, with a portion allocated to noncontrolling interests. As a result, Southern Power recognized a $12 million after-tax gain in the second quarter 2019.
Environmental Remediation
The Southern Company system must comply with environmental laws and regulations governing the handling and disposal of waste and releases of hazardous substances. Under these various laws and regulations, the Southern Company system could produce estimates that are significantly different from those recordedincur substantial costs to clean up affected sites. The traditional electric operating companies and the natural gas distribution utilities conduct studies to determine the extent of any required cleanup and have recognized the estimated costs to clean up known impacted sites in the financial statements. Senior management has reviewedA liability for environmental remediation costs is recognized only when a loss is determined to be probable and discussedreasonably estimable. The traditional electric operating companies and the following critical accounting policies and estimates with the Audit Committee of Southern Company's Board of Directors.
Utility Regulation
The Company's seven natural gas distribution utilities comprised approximately 80% of the Company's total operating revenues for 2016in Illinois and are subject to rate regulation byGeorgia have each received authority from their respective state PSCs or other applicable state regulatory agencies which setto recover approved environmental compliance costs through regulatory mechanisms. These regulatory mechanisms are adjusted annually or as necessary within limits approved by the rates utilities are permitted to charge customers based on allowable costs, including a reasonable ROE. As a result,state PSCs or other applicable state regulatory agencies. At December 31, 2019 and 2018, the utilities apply accounting standards which require the financial statements to reflect the effectsenvironmental remediation liabilities of rate regulation. Through the ratemaking process, the regulators may require the inclusion of costsAlabama Power and Mississippi Power were immaterial.
Georgia Power has been designated or revenues in periods different than when they would be recognized by a non-regulated company. This treatment may result in the deferral of expenses and the recording of related regulatory assets based on anticipated future recovery through rates or the deferral of gains or creation of liabilities and the recording of related regulatory liabilities. The application of the accounting standards has a further effect on the Company's financial statementsidentified as a result of the estimates of allowable costs used in the ratemaking process. These estimates may differ from those actually incurredpotentially responsible party at sites governed by the utilities; therefore,Georgia Hazardous Site Response Act and/or by the accounting estimates inherent in specific costs such as depreciationfederal Comprehensive Environmental Response, Compensation, and pensionLiability Act, and other postretirement benefits have less of a direct impact on the Company's results of operationsassessment and financial condition than they would on a non-regulated company.
As reflected in Note 1 to the financial statements, significant regulatory assets and liabilities have been recorded. Management reviews the ultimate recoverability of these regulatory assets and any requirement to refund these regulatory liabilities based on applicable regulatory guidelines and GAAP. However, adverse legislative, judicial, or regulatory actions could materially impact the amountspotential cleanup of such regulatory assetssites is expected. For all years presented, Georgia Power recovered approximately $2 million annually through the ECCR tariff. Effective January 1, 2020, Georgia Power is recovering approximately $12 million annually through the ECCR tariff under the 2019 ARP. Georgia Power recognizes a liability for environmental remediation costs only when it determines a loss is probable and liabilitiesreasonably estimable and could adversely impactreduces the Company's financial statements.
Pushdown of Acquisition Accounting
Southern Company has pushed down the application of the acquisition method of accounting to the Company's consolidated financial statements. The acquisition method of accounting requires the assets acquired and liabilities assumed in an acquired business to be recorded at their estimated fair values on the date of acquisition. Thereserve as expenditures are incurred. Any difference between the purchase priceliabilities accrued and costs recovered through rates is deferred as a regulatory asset or liability. The annual recovery amount is expected to be adjusted in future regulatory proceedings.
On December 23, 2019, Mississippi Power entered into an agreement with the Mississippi Commission on Environmental Quality related to groundwater conditions arising from the closed ash pond at Plant Watson. Mississippi Power paid a civil penalty of $200,000 and will complete an assessment and remediation consistent with the requirements of the agreement and the net fair valueCCR Rule. It is anticipated that corrective action will be needed; however, an estimate of assets acquired and liabilities assumedremedial costs will not be available until further site assessment is recognized as goodwill oncompleted. Mississippi Power expects to recover the balance sheet if it exceedsretail portion of remedial costs through the estimated fair value and as a bargain purchase gain on the income statement if it is below the estimated fair value. Determining the fair value of assets acquired and liabilities assumed requires management's judgment, often utilizes independent valuation experts, and involves the use of significant estimates and assumptions with respect to the timing and amounts of future cash inflows and outflows, discount rates, market prices, and asset lives, among other items. The judgments made in the determination of the estimated fair value assigned to the assets acquired and liabilities assumed, as well as the estimated useful life of each assetECO Plan and the duration of each liability, can materially impact the financial statements in periods after the Merger, such aswholesale portion through depreciation and amortization and interest expense. See Note 11 to the financial statements for additional information.
Given the significant judgment involved in estimating the fair values of assets acquired and liabilities assumed, the Company considers acquisition accounting to be a critical accounting estimate.
Assessment of Assets
Goodwill
The Company does not amortize its goodwill, but tests it annually for impairment at the reporting unit level during the fourth quarter or more frequently if impairment indicators arise. These indicators include, but are not limited to, a significant change in operating performance, the business climate, legal or regulatory factors, or a planned sale or disposition of a significant portion of the business. A reporting unit is the operating segment, or a business one level below the operating segment (a component), if discrete financial information is prepared and regularly reviewed by management. Components are aggregated if they have similar economic characteristics.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)MRA rates.
Southern Company Gas is subject to environmental remediation liabilities associated with 40 former MGP sites in 4 different states. Southern Company Gas' accrued environmental remediation liability at December 31, 2019 and Subsidiary Companies 2016 Annual Report


As part of the Company's impairment test, the Company may perform an initial qualitative Step 0 assessment to determine whether it is more likely than not that the fair value of each reporting unit is less than its carrying amount before applying the two-step, quantitative goodwill impairment test. If the Company elects to perform the qualitative assessment, it evaluates relevant events and circumstances, including but not limited to, macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, or it elects not to perform a qualitative assessment, it performs the two-step goodwill impairment test.
Step 1 of the two-step goodwill impairment test compares the fair value of the reporting unit to its carrying value. If the result of the Step 1 test reveals that the estimated fair value is below its carrying value, the Company proceeds with Step 2.
Step 2 of the goodwill impairment test compares the implied fair value of goodwill, which is calculated as the residual amount from the reporting unit's overall fair value after assigning fair values to its assets and liabilities under a hypothetical purchase price allocation as if the reporting unit had been acquired in a business combination, to its carrying value. Based2018 was based on the result of the Step 2 test, the Company records a goodwill impairment charge for any excess of carrying value over the implied fair value of goodwill.
For the 2016 and 2015 annual impairment tests, the Company performed the qualitative Step 0 assessment described above and determined that it was more likely than not that the fair value of all of its reporting units with goodwill exceeded their carrying amounts, and therefore no quantitative analysis was required. For the 2014 annual impairment test, the Company performed Step 1 of the two-step impairment test, which resulted in the fair value of all of its reporting units exceeding their carrying value.
In the third quarter 2015, the Company identified potential impairment indicators and performed an interim impairment test for its storage and fuels reporting unit, which resulted in impairment of the full $14 million goodwill balance for that reporting unit.
As the determination of an asset's fair value and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the Company considers these estimates to be critical accounting estimates.
Long-Lived Assets
The Company depreciates or amortizes its long-lived and intangible assets over their estimated useful lives. The Company assesses its long-lived and intangible assets for impairment whenever events or changes in circumstances indicate that an asset's carrying amount may not be recoverable. When such events or circumstances are present, the Company assesses the recoverability of long-lived assets by determining whether the carrying value will be recovered through the expected future cash flows. Impairment is indicated if the carrying amount of a long-lived asset exceeds the sum of the undiscounted future cash flows expected to result from the use and eventual disposition of the asset. If impairment is indicated, the Company records an impairment loss equal to the difference between the carrying value and the fair value of the long-lived asset.
As the determination of the expected future cash flows generated from an asset, an asset's fair value, and useful life involves management making certain estimates and because these estimates form the basis for the determination of whether or not an impairment charge should be recorded, the Company considers these estimates to be critical accounting estimates.
Derivatives and Hedging Activities
Determining whether a contract meets the definition of a derivative instrument, contains an embedded derivative requiring bifurcation, or qualifies for hedge accounting treatment is voluminous and complex. The treatment of a single contract may vary from period to period depending upon accounting elections, changes in the Company's assessment of the likelihood of future hedged transactions, or new interpretations of accounting guidance. As a result, judgment is required in determining the appropriate accounting treatment. In addition, the estimated fair value of derivative instruments may change significantly from period to period depending upon market conditions and changes in hedge effectiveness may impact the accounting treatment.
Derivative instruments (including certain derivative instruments embedded in other contracts) are recorded on the balance sheets as either assets or liabilities measured at their fair value. Unless the transaction qualifies for, and is designated as, a normal purchase or normal sale, it is exempted from fair value accounting treatment and is, instead, subject to traditional accrual accounting. The Company utilizes market data or assumptions that market participants would use in pricing the derivative asset or liability, including assumptions about risk and the risks inherent in the inputs of the valuation technique.
Changes in the derivatives' fair value are recognized concurrently in earnings unless specific hedge accounting criteria are met. If the derivatives meet those criteria, derivative gains and losses offset related results of the hedged item in the income statement in the case of a fair value hedge, or gains and losses are recorded in OCI on the balance sheets until the hedged transaction affects


MANAGEMENT'S DISCUSSION AND ANALYSISCOMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



earnings in the caseestimated cost of a cash flow hedge. Additionally, a company is required to formally designate a derivative as a hedge as well as documentenvironmental investigation and assess the effectiveness of derivativesremediation associated with transactions that receive hedge accounting treatment.
Nicor Gasknown current and Elizabethtown Gas utilize derivative instruments to hedge the price risk for the purchase of natural gas for customers.former MGP operating sites. These derivativesenvironmental remediation expenditures are reflected at fair value and are not designated as accounting hedges. Realized gains or losses on such instruments are included in the cost of gas delivered and are passedgenerally recoverable from customers through directly to customers, subject to reviewrate mechanisms approved by the applicable state regulatory agencies of the natural gas distribution utilities.
At December 31, 2019 and therefore have no direct impact on earnings. Unrealized changes2018, the environmental remediation liability and the balance of under recovered environmental remediation costs were reflected in the fair value of these derivative instruments are deferredbalance sheets as regulatory assets or liabilities.follows:
 Southern Company
Georgia
Power
Southern Company Gas
 (in millions)
December 31, 2019:   
Environmental remediation liability:   
Other current liabilities$51
$15
$36
Accrued environmental remediation234

233
Under recovered environmental remediation costs:   
Other regulatory assets, current$49
$12
$37
Other regulatory assets, deferred300
40
260
    
December 31, 2018:   
Environmental remediation liability:   
Other current liabilities$49
$23
$26
Accrued environmental remediation268

268
Under recovered environmental remediation costs:   
Other regulatory assets, current$21
$2
$19
Other regulatory assets, deferred345
53
292

The Company uses derivative instruments primarily to reduce the impact to its results of operations due to the risk of changes in the price of natural gas and to a lesser extent the Company hedges against warmer-than-normal weather and interest rates. The fair value of natural gas derivative instruments used to manage exposure to changing natural gas prices reflects the estimated amounts that the Company would receive or pay to terminate or close the contracts at the reporting date, taking into account the current unrealized gains or losses on open contracts. For derivatives utilized at gas marketing services and wholesale gas services that are not designated as accounting hedges, changes in fair value are reported as gains or losses in the Company's results of operations in the period of change. Gas marketing services records derivative gains or losses arising from cash flow hedges in OCI and reclassifies them into earnings in the same period that the underlying hedged item is recognized in earnings.
The Company classifies derivative assets and liabilities based on the lowest level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy. The determination of the fair value of the derivative instruments incorporates various required factors. These factors include:
the creditworthiness of the counterparties involved and the impact of credit enhancements (such as cash deposits and letters of credit);
events specific to a given counterparty; and
the impact of the Company's nonperformance risk on its liabilities.
If there is a significant change in the underlying market prices or pricing assumptions the Company uses in pricing its derivative assets or liabilities, the Company may experience a significant impact on its financial position, results of operations, and cash flows. See Note 10 to the financial statements for additional information.
Given the assumption used in pricing the derivative asset or liability, the Company considers the valuation of derivative assets and liabilities a critical accounting estimate. See FINANCIAL CONDITION AND LIQUIDITY – "Market Price Risk" herein for more information.
Pension and Other Postretirement Benefits
The Company's calculation of pension and other postretirement benefits expense is dependent on a number of assumptions. These assumptions include discount rates, healthcare cost trend rates, expected long-term return on plan assets, mortality rates, expected salary and wage increases, and other factors. Components of pension and other postretirement benefits expense include interest and service cost on the pension and other postretirement benefit plans, expected return on plan assets, and amortization of certain unrecognized costs and obligations. Actual results that differ from the assumptions utilized are accumulated and amortized over future periods and, therefore, generally affect recognized expense and the recorded obligation in future periods. While the Company believes that the assumptions used are appropriate, differences in actual experience or significant changes in assumptions would affect its pension and other postretirement benefits costs and obligations.
Key elements in determining the Company's pension and other postretirement benefit expense are the expected long-term return on plan assets and the discount rate used to measure the benefit plan obligations and the periodic benefit plan expense for future periods. The expected long-term return on pension and other postretirement benefit plan assets is based on the Company's investment strategy, historical experience, and expectations for long-term rates of return that consider external actuarial advice. The Company determines the long-term return on plan assets by applying the long-term rate of expected returns on various asset classes to the Company's target asset allocation. For purposes of determining its liability related to the pension and other postretirement benefit plans, the Company discounts the future related cash flows using a single-point discount rate developed from the weighted average of market-observed yields for high quality fixed income securities with maturities that correspond to expected benefit payments. For 2015 and 2014, the Company computed the interest cost component of its net periodic pension and other postretirement benefit plan expense using the same single-point discount rate. For the successor period of July 1, 2016 through December 31, 2016 and the predecessor period of January 1, 2016 through June 30, 2016, the Company adopted a full yield curve approach for calculating the interest cost component whereby the discount rate for each year is applied to the liability

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


for that specific year. As a result, the interest cost component of net periodic pension and other postretirement benefit plan expense decreased by approximately $7 million in 2016.
A 25 basis point change in any significant assumption (discount rate, salaries, or long-term return on plan assets) would result in a $4 million or less change in total annual benefit expense, a $38 million or less change in projected obligations for the pension plans, a $1 million or less change in total annual benefit expense, and an $8 million or less change in projected obligations for the other postretirement benefit plan.
See Note 2 to the financial statements for additional information regarding pension and other postretirement benefits.
Contingent Obligations
The Company is subject to a number of federal and state laws and regulations as well as other factors and conditions that subject it to environmental, litigation, and other risks. See FUTURE EARNINGS POTENTIAL herein and Note 3 to the financial statements for more information regarding certain of these contingencies. The Company periodically evaluates its exposure to such risks and records reserves for those matters where a non-tax-related loss is considered probable and reasonably estimable. The adequacy of reserves can be significantly affected by external events or conditions that can be unpredictable; thus, the ultimate outcome of suchthese matters could materially affect the Company's results of operations, cash flows, or financial condition.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition withcannot be determined at this time; however, as a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principleresult of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide natural gas without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the natural gas supplied and billed in that period (including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment for environmental remediation expenses described above, the final disposition of these matters is not permitted, it could have a material impact on the Company's financial statements.
The new standard is effective for interim and annual reporting periods beginning after December 15, 2017. The Company must select a transition method to be applied either retrospectively to each prior reporting period presented or retrospectively with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impact of the new standard has not yet been determined, the Company has not elected its transition method.
On November 20, 2015, the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes (ASU 2015-17), which simplifies the presentation of deferred income taxes. ASU 2015-17 requires deferred tax assets and liabilities to be presented as non-current in a classified balance sheet and is effective for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. As permitted, the Company elected to early adopt the guidance in 2016. Prior to the adoption of ASU 2015-17, all deferred income tax assets and liabilities were required to be separated into current and non-current amounts. The adoption of ASU 2015-17 did not have an impact on the results of operations, cash flows, or financial condition of the Company.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. ASU 2016-02 is effective for fiscal years beginning after December 15,

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected to have a significant impact on the Company's balance sheet.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation to be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Note 5 to the financial statements for the disclosure impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements.
On November 17, 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statement of cash flows. Upon adoption, the net change in cash and cash equivalents during the period will include amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to each period presented. The Company does not intend to adopt the guidance early. The adoption of ASU 2016-18 will not have a material impact on the financial statements of the Company.applicable Registrants.
Nuclear Fuel Disposal Costs
Acting through the DOE and pursuant to the Nuclear Waste Policy Act of 1982, the U.S. government entered into contracts with Alabama Power and Georgia Power that require the DOE to dispose of spent nuclear fuel and high level radioactive waste generated at Plants Farley, Hatch, and Vogtle Units 1 and 2 beginning no later than January 31, 1998. The DOE has yet to commence the performance of its contractual and statutory obligation to dispose of spent nuclear fuel. Consequently, Alabama Power and Georgia Power pursued and continue to pursue legal remedies against the U.S. government for its partial breach of contract.
In 2014, Alabama Power and Georgia Power filed lawsuits against the U.S. government for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2011 through December 31, 2013. The damage period was subsequently extended to December 31, 2014. On June 12, 2019, the Court of Federal Claims granted Alabama Power's and Georgia Power's motion for summary judgment on damages not disputed by the U.S. government, awarding those undisputed damages to Alabama Power and Georgia Power. However, those undisputed damages are not collectible and no amounts will be recognized in the financial statements until the court enters final judgment on the remaining damages.
In 2017, Alabama Power and Georgia Power filed additional lawsuits against the U.S. government in the Court of Federal Claims for the costs of continuing to store spent nuclear fuel at Plants Farley, Hatch, and Vogtle Units 1 and 2 for the period from January 1, 2015 through December 31, 2017. Damages will continue to accumulate until the issue is resolved, the U.S. government disposes of Alabama Power's and Georgia Power's spent nuclear fuel pursuant to its contractual obligations, or alternative storage is otherwise provided. No amounts have been recognized in the financial statements as of December 31, 2019 for any potential recoveries from the pending lawsuits.

COMBINED NOTES TO FINANCIAL CONDITION AND LIQUIDITYSTATEMENTS (continued)
OverviewSouthern Company and Subsidiary Companies 2019 Annual Report

The final outcome of these matters cannot be determined at this time. However, Alabama Power and Georgia Power expect to credit any recoveries for the benefit of customers in accordance with direction from their respective PSC; therefore, no material impact on Southern Company's, Alabama Power's, or Georgia Power's net income is expected.
On-site dry spent fuel storage facilities are operational at all 3 plants and can be expanded to accommodate spent fuel through the expected life of each plant.
Nuclear Insurance
Under the Price-Anderson Amendments Act (Act), Alabama Power and Georgia Power maintain agreements of indemnity with the NRC that, together with private insurance, cover third-party liability arising from any nuclear incident occurring at the companies' nuclear power plants. The Act provides funds up to $13.9 billion for public liability claims that could arise from a single nuclear incident. Each nuclear plant is insured against this liability to a maximum of $450 million by American Nuclear Insurers (ANI), with the remaining coverage provided by a mandatory program of deferred premiums that could be assessed, after a nuclear incident, against all owners of commercial nuclear reactors. A company could be assessed up to $138 million per incident for each licensed reactor it operates but not more than an aggregate of $20 million per incident to be paid in a calendar year for each reactor. Such maximum assessment, excluding any applicable state premium taxes, for Alabama Power and Georgia Power, based on its ownership and buyback interests in all licensed reactors, is $275 million and $267 million, respectively, per incident, but not more than an aggregate of $41 million and $40 million, respectively, to be paid for each incident in any one year. Both the maximum assessment per reactor and the maximum yearly assessment are adjusted for inflation at least every five years. The next scheduled adjustment is due no later than November 1, 2023. See Note 5 under "Joint Ownership Agreements" for additional information on joint ownership agreements.
Alabama Power and Georgia Power are members of Nuclear Electric Insurance Limited (NEIL), a mutual insurer established to provide property damage insurance in an amount up to $1.5 billion for members' operating nuclear generating facilities. Additionally, both companies have NEIL policies that currently provide decontamination, excess property insurance, and premature decommissioning coverage up to $1.25 billion for nuclear losses and policies providing coverage up to $750 million for non-nuclear losses in excess of the $1.5 billion primary coverage.
NEIL also covers the additional costs that would be incurred in obtaining replacement power during a prolonged accidental outage at a member's nuclear plant. Members can purchase this coverage, subject to a deductible waiting period of up to 26 weeks, with a maximum per occurrence per unit limit of $490 million. After the deductible period, weekly indemnity payments would be received until either the unit is operational or until the limit is exhausted. Alabama Power and Georgia Power each purchase limits based on the projected full cost of replacement power, subject to ownership limitations, and have each elected a 12-week deductible waiting period for each nuclear plant.
A builders' risk property insurance policy has been purchased from NEIL for the construction of Plant Vogtle Units 3 and 4. This policy provides the Vogtle Owners up to $2.75 billion for accidental property damage occurring during construction.
Under each of the NEIL policies, members are subject to assessments each year if losses exceed the accumulated funds available to the insurer. The maximum annual assessments for Alabama Power and Georgia Power as of December 31, 2019 under the NEIL policies would be $58 million and $85 million, respectively.
Claims resulting from terrorist acts are covered under both the ANI and NEIL policies (subject to normal policy limits). The aggregate that NEIL will pay for all claims resulting from terrorist acts in any 12-month period is $3.2 billion plus such additional amounts NEIL can recover through reinsurance, indemnity, or other sources.
For all on-site property damage insurance policies for commercial nuclear power plants, the NRC requires that the proceeds of such policies shall be dedicated first for the sole purpose of placing the reactor in a safe and stable condition after an accident. Any remaining proceeds are to be applied next toward the costs of decontamination and debris removal operations ordered by the NRC, and any further remaining proceeds are to be paid either to the applicable company or to its debt trustees as may be appropriate under the policies and applicable trust indentures. In the event of a loss, the amount of insurance available might not be adequate to cover property damage and other expenses incurred. Uninsured losses and other expenses, to the extent not recovered from customers, would be borne by Alabama Power or Georgia Power, as applicable, and could have a material effect on Southern Company's, Alabama Power's, and Georgia Power's financial condition remained stableand results of operations.
All retrospective assessments, whether generated for liability, property, or replacement power, may be subject to applicable state premium taxes.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Other Matters
Southern Company
As discussed in Note 1 under "Leveraged Leases," a subsidiary of Southern Holdings has several leveraged lease agreements. The ability of the lessees to make required payments to the Southern Holdings subsidiary is dependent on the operational performance of the assets. In 2017, the financial and operational performance of 1 of the lessees and the associated generation assets raised significant concerns about the short-term ability of the generation assets to produce cash flows sufficient to support ongoing operations and the lessee's contractual obligations and its ability to make the remaining semi-annual lease payments through the end of the lease term in 2047. In addition, following the expiration of the existing power offtake agreement in 2032, the lessee also is exposed to remarketing risk, which encompasses the price and availability of alternative sources of generation. While all lease payments through December 31, 2019 have been paid in full due to recent operational improvements, operational and remarketing risks and the resulting cash liquidity challenges persist, and significant concerns continue regarding the lessee's ability to make the remaining semi-annual lease payments. These challenges may also impact the expected residual value of the generation assets. Southern Company has evaluated the recoverability of the lease receivable and the expected residual value of the generation assets under various scenarios. Based on current forecasts of energy prices in the years following the expiration of the existing PPA, Southern Company concluded that it is no longer probable that all of the associated rental payments will be received over the term of the lease. As a result, during the fourth quarter 2019, Southern Company revised the estimate of cash flows to be received under the leveraged lease, which resulted in an impairment charge of $17 million ($13 million after tax). If any future lease payment is not paid in full, the Southern Holdings subsidiary may be unable to make its corresponding payment to the holders of the underlying non-recourse debt related to the generation assets. Failure to make the required payment to the debtholders could represent an event of default that would give the debtholders the right to foreclose on, and take ownership of, the generation assets from the Southern Holdings subsidiary, in effect terminating the lease and resulting in the write-off of the related lease receivable, which totaled approximately $76 million at December 31, 2016. The Company's cash requirements primarily consist of funding ongoing operations, common stock dividends, capital expenditures, and debt maturities. Capital expenditures and other investing activities include investments2019. Southern Company will continue to meet projected long-term demand requirements, to maintain existing natural gas distribution systems as well as to update and expand these systems, and to comply with environmental regulations. Operating cash flows provide a substantial portionmonitor the operational performance of the Company's cash needs. Forunderlying assets and evaluate the three-year period from 2017 through 2019,ability of the Company's projected common stock dividends, capital expenditures, and debt maturities are expected to exceed operating cash flows. The Company plans to finance future cash needs in excess of its operating cash flows primarily through debt issuances and equity contributions from Southern Company. The Company intendslessee to continue to monitor its accessmake the required lease payments. The ultimate outcome of this matter cannot be determined at this time.
Alabama Power
On October 16, 2019, Alabama Power agreed to short-term and long-term capital markets as well as its bank credit arrangementsa consent order regarding a fish kill investigation. The consent order required Alabama Power to meet future capital and liquidity needs. See "Sources of Capital," "Financing Activities," and "Capital Requirements and Contractual Obligations" herein for additional information.
By regulation, Nicor Gas is restricted,pay approximately $50,000 to the extentAlabama Department of its retained earnings balance,Environmental Management in civil penalties and approximately $172,000 to the Alabama Department of Conservation and Natural Resources in fish restocking costs. Alabama Power paid the penalties and restocking costs during the fourth quarter 2019.
Mississippi Power
In 2013, Mississippi Power submitted a lost revenue claim under the Deepwater Horizon Economic and Property Damages Settlement Agreement associated with the oil spill that occurred in the amount it can dividend or loanGulf of Mexico in 2010. In May 2018, Mississippi Power's claim was settled. The settlement proceeds of $18 million, net of expenses and income tax, were included in Mississippi Power's earnings for 2018. Mississippi Power received half of the settlement proceeds in 2018 and half in 2019.
In conjunction with Southern Company's sale of Gulf Power, NextEra Energy held back $75 million of the purchase price pending Mississippi Power and Gulf Power negotiating a mutually acceptable revised operating agreement for Plant Daniel. In addition, Mississippi Power and Gulf Power committed to affiliatesseek a restructuring of their 50% undivided ownership interests in Plant Daniel such that each of them would, after the restructuring, own 100% of a generating unit. On January 15, 2019, Gulf Power provided notice to Mississippi Power that Gulf Power will retire its share of the generating capacity of Plant Daniel on January 15, 2024. Mississippi Power has the option to purchase Gulf Power's ownership interest for $1 on January 15, 2024, provided that Mississippi Power exercises the option no later than 120 days prior to that date. Mississippi Power is assessing the potential operational and is not permittedeconomic effects of Gulf Power's notice. The ultimate outcome of these matters remains subject to make money pool loans to affiliates. Elizabethtown Gas is restricted by its dividend policy as establishedcompletion of Mississippi Power's evaluations and applicable regulatory approvals, including by the New Jersey BPU inFERC and the amount it can dividend to its parent company toMississippi PSC, and cannot be determined at this time. See Note 15 under "Southern Company" for information regarding the extentsale of 70% of its quarterly net income. Additionally, as stipulated in the New Jersey BPU's order approving the Merger, the Company is prohibited from paying dividends to its parent company, Gulf Power.
Southern Company if the Company's senior unsecured debt rating falls below investment grade. Gas
Gas Pipeline Projects
At December 31, 2016,2019, Southern Company Gas was involved in 2 gas pipeline construction projects, the amountAtlantic Coast Pipeline project and the PennEast Pipeline project.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and net income restricted to dividend totaled $688 million.Subsidiary Companies 2019 Annual Report

The Company's investmentsAtlantic Coast Pipeline has experienced challenges to its permits since construction began in 2018. During the third and fourth quarters 2018, a FERC stop work order, together with delays in obtaining permits necessary for construction and construction delays due to judicial actions, impacted the cost and schedule for the project. Project cost estimates are approximately $8.0 billion ($400 million for Southern Company Gas), excluding financing costs. On October 4, 2019, the U.S. Supreme Court agreed to hear Atlantic Coast Pipeline's appeal of a lower court ruling that overturned a key permit for the project. On January 7, 2020, the U.S. Court of Appeals for the Fourth Circuit vacated another key permit. The operator of the joint venture has indicated that it currently expects to complete construction by the end of 2021 and place the project in service shortly thereafter.
On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the qualified pension plan increased in valuefirst half of 2020; however, the ultimate outcome cannot be determined at December 31, 2016 as compared to December 31, 2015. On September 12, 2016, the Company voluntarily contributed $125 million to its qualified pension plan. No mandatory contributions to its qualified pension plan are anticipated during 2017.this time. See Note 2 to the financial statements15 under "Retirement Benefits""Southern Company Gas – Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
the PennEast Pipeline for Southern Company Gas total approximately $300 million, excluding financing costs. In January 2018, the PennEast Pipeline received initial FERC approval. Work continues with state and Subsidiary Companies 2016 Annual Report


Net cash used for operating activities was $328 million for the successor period of July 1, 2016 through December 31, 2016, which reflected a $125 million voluntary pension contribution, a $35 million payment for the settlement of an interest rate swap, and less cash due to the timing of collection of receivables and disbursement of payables. Due to the seasonal nature of its business, the Company typically reports negative cash flows from operating activities in the second half of the year. Net cash provided from operating activities was $1.1 billion for the predecessor period of January 1, 2016 through June 30, 2016, which reflected low volumes of natural gas sales and changes in natural gas inventory as a result of warmer weather and the timing of recovery of related gas costs and weather normalization adjustments from customers. Net cash provided from operating activities was $1.4 billion and $655 million for the predecessor years ended December 31, 2015 and 2014, respectively, which represents an increase of $726 million due to (i) higher working capital needs during 2014 resulting from higher natural gas prices and volumes delivered as well as the timing of recoveries of related gas costs from customers, (ii) cash provided from derivative financial instrument assets and liabilities primarily as a result of the decrease in forward NYMEX prices, and (iii) a 2014 tax refund of $150 million received in January 2015 related to the extension of bonus depreciation. These increases were partially offset by lower earnings, largely attributable to warmer weather compared to 2014, and net cash provided by energy marketing receivables and payables.
Net cash used for investing activities was $2.1 billion for the successor period of July 1, 2016 through December 31, 2016, which reflected $1.4 billion primarily related to the Company's acquisition of the 50% interest in SNG, and $632 million in capital expenditures. Net cash used for investing activities was $559 million for the predecessor period of January 1, 2016 through June 30, 2016, primarily related to $548 million in capital expenditures. Net cash used for investing activities was $1.0 billion and $505 million for the predecessor years ended December 31, 2015 and 2014, respectively, which reflected capital expenditures of $1.0 billion in 2015 and $769 million in 2014, partially offset by $225 million in proceeds from the sale of Tropical Shipping in 2014.
Net cash provided from financing activities was $2.4 billion for the successor period of July 1, 2016 through December 31, 2016, which reflected $1.1 billion of capital contributions from Southern Company, primarily used to fund the Company's investment in SNG, $1.1 billion in net additional commercial paper borrowings, partially offset by $160 million for the purchase of the 15% noncontrolling ownership interest in SouthStar, and $900 million in proceeds from debt issuances, partially offset by $420 million in debt payments. Net cash used for financing activities was $558 million for the predecessor period of January 1, 2016 through June 30, 2016 due to $896 million in net repayment of commercial paper borrowings and $125 million in repayment of long-term debt, partially offset by $600 million in debt issuances. Net cash used for financing activities was $366 million and $224 million for the predecessor years ended December 31, 2015 and 2014, respectively, which reflected an increase of $142 million due to the net repayment of commercial paper borrowings during 2015, partially offset by the proceeds from debt issuances in 2015 in excess of debt repayments.
The application of acquisition accounting during 2016 changed the basis of certain assets and liabilities. See Note 11 to the financial statements under "Merger with Southern Company" for additional information. In addition to the impacts of acquisition accounting, significant balance sheet changes at December 31, 2016 included increases of $951 million in long-term debt, including debt due within one year, primarily related to issuances of senior notes and first mortgage bonds, $1.5 billion in equity investments in unconsolidated subsidiaries primarily related to the investment in SNG, and $774 million in property, plant, and equipment due to capital expenditures at gas distribution operations, as well as an increase of $247 million in notes payable primarily due to increased spending on infrastructure replacement programs.
Sources of Capital
The Company plansfederal agencies to obtain the fundsrequired permits to meet its future capital needs through operating cash flows, short-term borrowings, securities issuances, term loans, and equity contributions from Southern Company. However,begin construction on the amount, type, and timing of any future financings, if needed, depend upon prevailing market conditions, regulatory approval, and other factors.
The issuance of securities by Nicor Gas is generally subject to the approval of the Illinois Commission.
The Company obtains financing separately without credit support from any affiliate in the Southern Company system. See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information. The Southern Company system does not maintain a centralized cash or money pool. Therefore, except as described below, funds of the Company are not commingled with funds of any other company in the Southern Company system.
The Company maintains commercial paper programs at Southern Company Gas Capital and Nicor Gas that consist of short-term, unsecured promissory notes. Nicor Gas' commercial paper program supports its working capital needs as Nicor Gas is not permitted to make money pool loans to affiliates. All of the Company's other subsidiaries benefit from Southern Company Gas Capital's commercial paper program.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


At December 31, 2016, the Company's current liabilities exceeded current assets by $668 million. The Company's current liabilities frequently exceed current assets because of commercial paper borrowings, long-term debt that is due within one year, and cash needs, which can fluctuate significantly due to the seasonality of the business.
At December 31, 2016, the Company had $19 million of cash and cash equivalents. Committed credit arrangements with banks at December 31, 2016 were as follows:
  Expires    Expires Within One Year
Company 2017 2018 Total UnusedTerm Out No Term Out
  (in millions) (in millions)(in millions)
Southern Company Gas Capital(*)
 $49
 $1,251
 $1,300
 $1,249
$
 $49
Nicor Gas 26
 674
 700
 700

 26
Total $75
 $1,925
 $2,000
 $1,949
$
 $75
(*)Southern Company Gas guarantees the obligations of Southern Company Gas Capital.
Pivotal Utility Holdings is party to a series of loan agreements with the New Jersey Economic Development Authority and Brevard County, Florida under which five series of gas facility revenue bonds have been issued totaling approximately $200 million.
See Note 6 to the financial statements under "Bank Credit Arrangements" for additional information.
The Southern Company Gas Credit Facility and the Nicor Gas Credit Facility included in the table above each contain a covenant that limits the ratio of debt to capitalization (as defined in each Facility) to a maximum of 70% and contain cross acceleration provisions to other indebtedness (including guarantee obligations) of the applicable company. Such cross acceleration provisions to other indebtedness would triggerPennEast Pipeline. On September 10, 2019, an event of default if the applicable company defaulted on indebtedness, the payment of which was then accelerated. At December 31, 2016, each of the applicable companies were in compliance with all such covenants. Neither of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
Subject to applicable market conditions, the applicable company expects to renew or replace its bank credit arrangements, as needed, prior to expiration. In connection therewith, the applicable company may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
The Company has substantial cash flow from operating activities and access to the capital markets, including commercial paper programs, to meet liquidity needs. The Company makes short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above. Commercial paper borrowings are included within notes payable in the balance sheets.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Details of short-term borrowings were as follows:
  Short-term Debt at the End of the Period 
Short-term Debt During the Period(*)
  Amount
Outstanding
 Weighted Average Interest Rate Average
Amount Outstanding
 Weighted Average Interest Rate Maximum
Amount
Outstanding
  (in millions)   (in millions)   (in millions)
Successor – December 31, 2016:          
Southern Company Gas Capital $733
 1.09% $309
 0.67% $770
Nicor Gas 524
 0.95% 461
 0.79% 587
Total $1,257
 1.03% $770
 0.74%  
           
Predecessor – December 31, 2015:          
Southern Company Gas Capital $471
 0.71% $382
 0.49% $787
Nicor Gas 539
 0.52% 349
 0.38% 585
Total $1,010
 0.60% $731
 0.44%  
Predecessor – December 31, 2014:          
Southern Company Gas Capital $590
 0.48% $399
 0.33% $1,006
Nicor Gas 585
 0.44% 279
 0.25% 614
Total $1,175
 0.46% $678
 0.29%  
(*)Average and maximum amounts are based upon daily balances during the successor period of July 1, 2016 through December 31, 2016 and the predecessor years ended December 31, 2015 and 2014.
The Company believesappellate court ruled that the need for working capital can be adequately met by utilizing commercial paper programs, lines of credit, and operating cash flows.
Financing Activities
The long-term debt on the Company's consolidated balance sheets includes both principal and non-principal components. At December 31, 2016, the non-principal component was $569 million, which consisted of the unamortized portions of the fair value adjustment recorded in purchase accounting, debt premiums, debt discounts, and debt issuance costs.
In February and May 2016, $75 million and $50 million, respectively, of Nicor Gas' first mortgage bonds matured and were repaid using the proceeds from commercial paper borrowings.
In May 2016, Southern Company Gas Capital issued $350 million aggregate principal amount of 3.250% Senior Notes due June 15, 2026, which are guaranteed by Southern Company Gas. The proceeds were used to repay at maturity $300 million aggregate principal amount of 6.375% Senior Notes due July 15, 2016 and for general corporate purposes.
In June 2016, Nicor Gas issued $250 million aggregate principal amount of first mortgage bonds with the following terms: $100 million at 2.66% due June 20, 2026, $100 million at 2.91% due June 20, 2031, and $50 million at 3.27% due June 20, 2036. The proceeds were used to repay short-term indebtedness incurred under the Nicor Gas commercial paper program and for other working capital needs.
In September 2016, Southern Company Gas Capital issued $350 million aggregate principal amount of 2.45% Senior Notes due October 1, 2023 and $550 million aggregate principal amount of 3.95% Senior Notes due October 1, 2046, both of which are guaranteed by Southern Company Gas. The proceeds were used to repay a $360 million promissory note issued to Southern Company for the purpose of funding a portion of the purchase price for a 50% equity interest in SNG, to fund the purchase of Piedmont's interest in SouthStar, to make a voluntary contribution to the pension plan, to repay at maturity $120 million aggregate principal amount of Series A Floating Rate Senior Notes due October 27, 2016, and for general corporate purposes.
A portion of the purchase price of the Company's investment in SNG was funded by a $1.05 billion equity contribution from Southern Company received in September 2016. See Note 4 to the financial statements under "Investment in SNG" for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


In addition to any financings that may be necessary to meet capital requirements and contractual obligations, the Company plans to continue, when economically feasible, a program to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit.
Credit Rating Risk
The CompanyPennEast Pipeline does not have any credit arrangements that would require material changesfederal eminent domain authority over lands in payment schedules or terminations aswhich a resultstate has property rights interests. On February 18, 2020, PennEast Pipeline filed a petition for a writ of a credit rating downgrade.
There are certain contracts that could require collateral, but not accelerated payment, in the event of a credit rating change below BBB- and/or Baa3. These contracts are for physical gas purchases and sales and energy price risk management. The maximum potential collateral requirements under these contracts at December 31, 2016 was $26 million.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. Additionally, a credit rating downgrade could impact the abilitycertiorari to seek U.S. Supreme Court review of the Company to access capital markets and would be likely to impact the cost at which it does so.
appellate court decision. On May 12, 2016, Fitch revised its ratings outlook for the Company from positive to stable.
On July 11, 2016, in conjunctionDecember 30, 2019, PennEast Pipeline filed a two-year extension request with the closeFERC to complete the project by January 19, 2022.
Additionally, on January 30, 2020, PennEast Pipeline filed an amendment with the FERC to construct the pipeline project in 2 phases. The first phase would consist of the Merger, S&P raised the Company's and Nicor Gas' corporate and senior unsecured long-term debt ratings from BBB+ to A- and revised their ratings outlooks from positive to negative.
On January 10, 2017, S&P revised its consolidated credit rating outlook for Southern Company (including the Company) from negative to stable.
Market Price Risk
The Company is exposed to market risks, primarily commodity price risk, interest rate risk, and weather risk. Due to various cost recovery mechanisms, the natural gas distribution utilities68 miles of the Company that sell natural gas directly to end-use customers have limited exposure to market volatility of natural gas prices. To manage the volatility attributable to these exposures, the Company nets the exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company's policies in areas such as counterparty exposure and risk management practices. The Company uses derivatives to buy and sell natural gas as well as for hedging purposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis.
To mitigate future exposure to changes in interest rates, the Company may enter into derivatives designated as hedges. The weighted average interest rate on $200 million of long-term variable interest rate exposure at January 1, 2017 was 1.28%. If the Company sustained a 100 basis point change in interest rates for all long-term variable interest rate exposure, the change would have an immaterial effect on annualized interest expense at January 1, 2017. See Note 1 to the financial statements under "Financial Instruments" and Note 10 to the financial statements for additional information.
Gas marketing services and wholesale gas services routinely utilize various types of derivative instruments to mitigate certain natural gas price and weather risks inherent in the natural gas industry. These instruments include a variety of exchange-traded and over-the-counter (OTC) energy contracts, such as forward contracts, futures contracts, options contracts, and swap agreements. Gas marketing services and wholesale gas services also actively manage storage positions through a variety of hedging transactions for the purpose of managing exposures arising from changing natural gas prices. These hedging instruments are used to substantially protect economic margins (as spreads between wholesale and retail natural gas prices widen between periods) and thereby minimize exposure to declining operating margins.
Certain natural gas distribution utilities of the Company manage fuel-hedging programs implemented per the guidelines of their respective state regulatory agencies to hedge the impact of market fluctuations in natural gas prices for customers. For the weather risk associated with Nicor Gas, the Company has a corporate weather hedging program that utilizes weather derivatives to reduce the risk of lower adjusted operating margins potentially resulting from significantly warmer-than-normal weather. In addition, certain non-regulated operations routinely utilize various types of derivative instruments to economically hedge certain commodity price and weather risks inherent in the natural gas industry. These instruments include a variety of exchange-traded and OTC energy contracts, such as forward contracts, futures contracts, options contracts, and swap agreements. Some of these economic hedge activities may not qualify, or are not designated, for hedge accounting treatment. The Company had no material change in market risk exposure during 2016.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


For the periods presented below, the changes in net fair value of derivative contracts were as follows:
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
  2016  2016 2015 2014
 (in millions)  (in millions)
Contracts outstanding at beginning of period, assets (liabilities), net$(54)  $75
 $61
 $(82)
Contracts realized or otherwise settled18
  (77) (17) 38
Current period changes(a)
48
  (82) 32
 105
Contracts outstanding at the end of period, assets (liabilities), net12
  (84) 76
 61
Netting of cash collateral62
  120
 96
 133
Cash collateral and net fair value of contracts outstanding at end of period(b)
$74
  $36
 $172
 $194
(a)Current period changes also include the changes in fair value of new contracts entered into during the period, if any.
(b)Net fair value of derivative contracts outstanding includes premium and associated intrinsic value associated with weather derivatives of $4 million at December 31, 2016, $5 million at June 30, 2016, $10 million at December 31, 2015, and $3 million at December 31, 2014.
The net hedge volume of energy-related derivative contracts for natural gas positions for the years ended December 31 were as follows:
 Successor  Predecessor
 2016  2015
 mmBtu Volume  mmBtu Volume
 (in millions)  (in millions)
Commodity – Natural gas157
  (9)
Net Purchased/(Sold) Volume157
  (9)
The Company's derivative contracts are comprised of both long and short natural gas positions. A long position is a contract to purchase natural gas, and a short position is a contract to sell natural gas. The volume presented above represents the net of long natural gas positions of 3.31 billion mmBtu and short natural gas positions of 3.16 billion mmBtu at December 31, 2016 and the net of long natural gas positions of 3.09 billion mmBtu and short natural gas positions of 3.10 billion mmBtu at December 31, 2015.
Energy-related derivative contracts that are designated as regulatory hedges relate primarily to the Company's fuel-hedging programs. Therefore, gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in cost of natural gas as the underlying gas is used in operations and ultimately recovered through the respective cost recovery clause. Certain other gains and losses on energy-related derivatives, designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales), are initially deferred in OCI before being recognized in income in the same period as the hedged transaction. Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalentpipe, constructed entirely within the natural gas industry. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.
The Company uses OTC contracts that are not exchange traded but are fair valued using pricesPennsylvania, which are market observable, and thus fall into Level 2 of the fair value hierarchy. See Note 9 to the financial statements for further discussion of fair value measurements.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


The maturities of the energy-related derivative contracts at December 31, 2016 were as follows:
   Fair Value Measurements
   Successor – December 31, 2016
   Maturity
 Total
Fair Value
 Year 1  Years 2 & 3 Years 4 and thereafter
 (in millions)
Level 1(a)
$(7) $15
 $(15) $(7)
Level 2(b)
19
 11
 
 8
Level 3
 
 
 
Fair value of contracts outstanding at end of period(c)
$12
 $26
 $(15) $1
(a)Valued using NYMEX futures prices.
(b)Valued using basis transactions that represent the cost to transport natural gas from a NYMEX delivery point to the contract delivery point. These transactions are based on quotes obtained either through electronic trading platforms or directly from brokers.
(c)Excludes cash collateral of $62 million at December 31, 2016.
Value at Risk (VaR)
VaR is the maximum potential loss in portfolio value over a specified time period that is not expected to be exceeded within a given degree of probability. The Company's VaR may not be comparable to that of other companies due to differences in the factors used to calculate VaR. The Company's VaR is determined on a 95% confidence interval and a one-day holding period, which means that 95% of the time, the risk of loss in a day from a portfolio of positions is expected to be less than or equal tocompleted by November 2021. The second phase would include the amount of VaR calculated. The open exposureremaining route in Pennsylvania and New Jersey and is targeted for completion in 2023. FERC approval of the Companyamended plan is managed in accordance with established policies that limit market risk and require daily reporting of potential financial exposurerequired prior to senior management. Becausebeginning the Company generally manages physical gas assets and economically protects its positions by hedging in the futures markets, the Company's open exposure is generally mitigated. The Company employs daily risk testing, using both VaR and stress testing, to evaluate the risk of its positions.first phase.
The Company actively monitors open commodity positions and the resulting VaR and maintains a relatively small risk exposure as total buy volume is close to sell volume, with minimal open natural gas price risk. Based on a 95% confidence interval and employing a one-day holding period, SouthStar's portfolioultimate outcome of positions for the successor periodthese matters cannot be determined at this time; however, any work delays, whether caused by judicial or regulatory action, abnormal weather, or other conditions, may result in additional cost or schedule modifications or, ultimately, in project cancellation, any of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014 was immaterial.
For the periods presented below, wholesale gas services had the following VaRs:
 Successor  Predecessor
 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, Years Ended December 31,
  2016  2016 2015 2014
 (in millions)  (in millions)
Period end$2.3
  $1.9
 $2.4
 $4.7
Average2.0
  2.0
 3.0
 4.3
High2.8
  2.5
 7.3
 19.7
Low1.4
  1.6
 1.6
 1.8
Credit Risk
Gas Distribution Operations
Atlanta Gas Light has a concentration of credit risk, as it bills 14 certificated and active Marketers in Georgia for its services. The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The functions of the retail sale of gas include the purchase and sale of natural gas, customer service, billings, and collections. The

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


provisions of Atlanta Gas Light's tariff allow Atlanta Gas Light to obtain security supportwhich could result in an amount equal to a minimumimpairment of two times a Marketer's highest month's estimated bill from Atlanta Gas Light. For 2016, the four largest Marketers based on customer count accounted for 17% of the Company's consolidated adjusted operating margin and 20% of gas distribution operations' adjusted operating margin.
Several factors are designed to mitigate the Company's risks from the increased concentration of credit that has resulted from deregulation. In addition to the security support described above, Atlanta Gas Light bills intrastate delivery service to Marketers in advance rather than in arrears. Atlanta Gas Light accepts credit support in the form of cash deposits, letters of credit/surety bonds from acceptable issuers, and corporate guarantees from investment-grade entities. On a monthly basis, the Risk Management Committee reviews the adequacy of credit support coverage, credit rating profiles of credit support providers, and payment status of each Marketer. The Company believes that adequate policies and procedures are in place to properly quantify, manage, and report on Atlanta Gas Light's credit risk exposure to Marketers.
Atlanta Gas Light also faces potential credit risk in connection with assignments of interstate pipeline transportation and storage capacity to Marketers. Although Atlanta Gas Light assigns this capacity to Marketers, in the event that a Marketer fails to pay the interstate pipelines for the capacity, the interstate pipelines would likely seek repayment from Atlanta Gas Light.
Gas Marketing Services
The Company obtains credit scores for its firm residential and small commercial customers using a national credit reporting agency, enrolling only those customers that meetone or exceed the Company's credit threshold. The Company considers potential interruptible and large commercial customers based on reviews of publicly available financial statements and commercially available credit reports. Prior to entering into a physical transaction, the Company also assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements.
Wholesale Gas Services
The Company has established credit policies to determine and monitor the creditworthiness of counterparties, as well as the quality of pledged collateral. The Company also utilizes master netting agreements whenever possible to mitigate exposure to counterparty credit risk. When the Company is engaged in more than one outstanding derivative transaction with the same counterparty and also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of the Company's credit risk. The Company also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Master netting agreements enable the Company to net certain assets and liabilities by counterparty. The Company also nets across product lines and against cash collateral, provided the master netting and cash collateral agreements include such provisions.
The Company may require counterparties to pledge additional collateral when deemed necessary. The Company conducts credit evaluations and obtains appropriate internal approvals for a counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, the Company requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
Certain of the Company's derivative instruments contain credit-risk-related or other contingent features that could increase the payments for collateral it posts in the normal course of business when its financial instruments are in net liability positions. At December 31, 2016, for agreements with such features, the Company's derivative instruments with liability fair values totaled $5 million, for which the Company had no collateral posted with derivatives counterparties to satisfy these arrangements.
The Company has a concentration of credit risk as measured by its 30-day receivable exposure plus forward exposure. At December 31, 2016, wholesale gas services' top 20 counterparties represented approximately 46%, or $205 million, of its total counterparty exposure and had a weighted average S&P equivalent credit rating of A-, which is consistent with the prior year. The S&P equivalent credit rating is determined by a process of converting the lower of the S&P or Moody's ratings to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being D / Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of the financial ratios of that counterparty. To arrive at the weighted average credit rating, each counterparty is assigned an internal ratio, which is multiplied by their credit exposure and summed for all counterparties. The sum is divided by the aggregate total counterparties' exposures, and this numeric value is then converted to an S&P equivalent.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


The following table provides credit risk information related to the Company's third-party natural gas contracts receivable and payable positions at December 31:
 Gross Receivables Gross Payables
 Successor  Predecessor Successor  Predecessor
 2016  2015 2016  2015
 (in millions)  (in millions) (in millions)  (in millions)
Netting agreements in place:         
Counterparty is investment grade$375
  $299
 $227
  $136
Counterparty is non-investment grade14
  8
 31
  17
Counterparty has no external rating223
  133
 339
  265
No netting agreements in place:         
Counterparty is investment grade11
  5
 
  
Amount recorded in Consolidated Balance Sheets$623
  $445
 $597
  $418
Capital Requirements and Contractual Obligations
The Company's capital investments are currently estimated to total $1.7 billion for 2017, $1.7 billion for 2018, $1.7 billion for 2019, $1.4 billion for 2020, and $1.2 billion for 2021. The regulatory infrastructure programs and other construction programs are subject to periodic review and revision, and actual costs may vary from these estimates because of numerous factors. These factors include: changes in business conditions; changes in FERC rules and regulations; state regulatory agency approvals; changes in legislation; the cost and efficiency of labor, equipment, and materials; project scope and design changes; and the cost of capital. In addition, there can be no assurance that costs related to capital expenditures will be fully recovered.
In addition, as discussed in Note 2 to the financial statements, the Company provides postretirement benefits to certain eligible employees and funds trusts to the extent required by the applicable state regulatory agencies.
Other funding requirements related to obligations associated with scheduled maturities of long-term debt, including the related interest; pipeline charges, storage capacity, and gas supply; operating leases; asset management agreements; standby letters of credit and performance/surety bonds; financial derivative obligations; pension and other postretirement benefit plans; and other purchase commitments are detailed in the contractual obligations table that follows. See Notes 3, 6, 7, and 11 to the financial statements for additional information.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Contractual Obligations
Contractual obligations at December 31, 2016 were as follows:
 2017 2018-
2019
 2020-
2021
 After
2021
 Total
 (in millions)
Long-term debt(a) —
         
Principal$22
 $505
 $330
 $3,855
 $4,712
Interest207
 406
 364
 2,500
 3,477
Pipeline charges, storage capacity and gas supply(b)
822
 1,049
 746
 2,591
 5,208
Operating leases(c)
18
 33
 30
 38
 119
Asset management agreements(d)
10
 7
 
 
 17
Standby letters of credit and performance/surety bonds(e)
85
 1
 
 
 86
Financial derivative obligations(f)
487
 70
 11
 1
 569
Pension and other postretirement benefit plans(g)
21
 45
 
 
 66
Purchase commitments —         
Capital(h)
1,736
 3,396
 2,563
 
 7,695
Other(i)
60
 15
 2
 2
 79
Total$3,468
 $5,527
 $4,046
 $8,987
 $22,028
(a)Amounts are reflected based on final maturity dates. The Company plans to continue, when economically feasible, to retire higher-cost securities and replace these obligations with lower-cost capital if market conditions permit. Variable rate interest obligations are estimated based on rates at January 1, 2017, as reflected in the statements of capitalization. Fixed rates include, where applicable, the effects of interest rate derivatives employed to manage interest rate risk.
(b)Includes charges recoverable through a natural gas cost recovery mechanism, or alternatively billed to Marketers, and demand charges associated with Sequent. The gas supply balance includes amounts for Nicor Gas and SouthStar gas commodity purchase commitments of 33 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2016 and valued at $106 million. As the Company does for certain of its affiliates, it provides guarantees to certain gas suppliers of SouthStar in support of payment obligations.
(c)Certain operating leases have provisions for step rent or escalation payments and certain lease concessions are accounted for by recognizing the future minimum lease payments on a straight-line basis over the respective minimum lease terms. However, this accounting treatment does not affect the future annual operating lease cash obligations as shown herein. The Company's operating leases are primarily for real estate.
(d)Represent fixed-fee minimum payments for Sequent's affiliated asset management agreements.
(e)Guarantees are provided to certain municipalities and other agencies and certain gas suppliers of SouthStar in support of payment obligations.
(f)Includes liabilities related to energy-related derivatives. For additional information, see Notes 1 and 10 to the financial statements.
(g)The Company forecasts contributions to the pension and other postretirement benefit plans over a three-year period. The Company anticipates no mandatory contributions to the qualified pension plan during the next three years. Amounts presented represent estimated benefit payments for the nonqualified pension plans, estimated non-trust benefit payments for the other postretirement benefit plans, and estimated contributions to the other postretirement benefit plan trusts, all of which will be made from the Company's corporate assets. See Note 2 to the financial statements for additional information related to the pension and other postretirement benefit plans, including estimated benefit payments. Certain benefit payments will be made through the related benefit plans. Other benefit payments will be made from the Company's corporate assets.
(h)Estimated capital expenditures are provided through 2021.
(i)Includes contractual environmental remediation liabilities that are generally recoverable through base rates or rate rider mechanisms and long-term service agreements.

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Cautionary Statement Regarding Forward-Looking Statements
The Company's 2016 Annual Report contains forward-looking statements. Forward-looking statements include, among other things, statements concerning regulatory matters, the strategic goals for the Company, economic conditions, natural gas price volatility, derivative losses, regulatory and environmental cost recovery and other rate actions, current and proposed environmental regulations and related compliance plans and estimated expenditures, pending or potential litigation matters, access to sources of capital, projections for the qualified pension plan contributions, financing activities, completion dates of construction projects, filings with state and federal regulatory authorities, and estimated other plans and expenditures. In some cases, forward-looking statements can be identified by terminology such as "may," "will," "could," "should," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "potential," or "continue" or the negative of these terms or other similar terminology. There are various factors that could cause actual results to differ materially from those suggested by the forward-looking statements; accordingly, there can be no assurance that such indicated results will be realized. These factors include:
the impact of recent and future federal and state regulatory changes, including environmental laws, and also changes in tax and other laws and regulations to which the Company is subject, including potential tax reform legislation, as well as changes in application of existing laws and regulations;
current and future litigation, regulatory investigations, proceedings, or inquiries;
the effects, extent, and timing of the entry of additional competition in the markets in which the Company operates;
variations in demand for natural gas, including those relating to weather, the general economy and recovery from the last recession, population and business growth (and declines), the effects of energy conservation and efficiency measures, including from the development and deployment of alternative energy sources, and any potential economic impacts resulting from federal fiscal decisions;
available sources and costs of natural gas;
limits on pipeline capacity;
effects of inflation;
the ability to control costs and avoid cost overruns during the development and construction of facilities;
investment performance of the Company's employee and retiree benefit plans;
advances in technology;
state and federal rate regulations and the impact of pending and future rate cases and negotiations, including rate actions relating to natural gas and other cost recovery mechanisms;
the inherent risks involved in transporting and storing natural gas;
the ability to successfully operate the natural gas distribution and storage facilities and the successful performance of necessary corporate functions;
internal restructuring or other restructuring options that may be pursued;
potential business strategies, including acquisitions or dispositions of assets or businesses, which cannot be assured to be completed or beneficial to the Company;
the possibility that the anticipated benefits from the Merger cannot be fully realized or may take longer to realize than expected, the possibility that costs related to integration with Southern Company will be greater than expected, the ability to retain and hire key personnel and maintain relationships with customers, suppliers, or other business partners, and the diversion of management time on integration related issues;
the ability of counterparties of the Company to make payments as and when due and to perform as required;
the direct or indirect effect on the Company's business resulting from cyber intrusion or terrorist incidents and the threat of terrorist incidents;
interest rate fluctuations and financial market conditions and the results of financing efforts;
changes in the Company's credit ratings, including impacts on interest rates, access to capital markets, and collateral requirements;
the impacts of any sovereign financial issues, including impacts on interest rates, access to capital markets, impacts on foreign currency exchange rates, counterparty performance, and the economy in general;
catastrophic events such as fires, earthquakes, explosions, floods, tornadoes, hurricanes and other storms, droughts, pandemic health events such as influenzas, or other similar occurrences;

MANAGEMENT'S DISCUSSION AND ANALYSIS (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


the direct or indirect effects on the Company's business resulting from incidents affecting the U.S. natural gas pipeline infrastructure or operation of storage resources;
the effect of accounting pronouncements issued periodically by standard-setting bodies; and
other factors discussed elsewhere herein and in other reports (including the Form 10-K) filed by the Company from time to time with the SEC.
The Company expressly disclaims any obligation to update any forward-looking statements.

CONSOLIDATED STATEMENTS OF INCOME
Southern Company Gas and Subsidiary Companies 2016 Annual Report

  Successor  Predecessor
  July 1, 2016 through December 31,  January 1, 2016 through June 30, 
For the years ended
December 31,
  2016  2016 2015 2014
  (in millions)  (in millions)
Operating Revenues:         
Natural gas revenues (includes revenue taxes of
$32, $57, $103, and $133 for the periods presented,
respectively)
 $1,596
  $1,841
 $3,817
 $5,257
Other revenues 56
  64
 124
 128
Total operating revenues 1,652
  1,905
 3,941
 5,385
Operating Expenses:         
Cost of natural gas 613
  755
 1,617
 2,729
Cost of other sales 10
  14
 28
 36
Other operations and maintenance 482
  454
 928
 939
Depreciation and amortization 238
  206
 397
 380
Taxes other than income taxes 71
  99
 181
 208
Merger-related expenses 41
  56
 44
 
Total operating expenses 1,455
  1,584
 3,195
 4,292
Gain on disposition of assets 
  
 
 2
Operating Income 197
  321
 746
 1,095
Other Income and (Expense):         
Interest expense, net of amounts capitalized (81)  (96) (175) (182)
Earnings from equity method investments
60
  2
 6
 8
Other income (expense), net 14
  5
 9
 9
Total other income and (expense) (7)  (89) (160) (165)
Earnings Before Income Taxes 190
  232
 586
 930
Income taxes 76
  87
 213
 350
Income from continuing operations 114
  145
 373
 580
Loss from discontinued operations, net of tax 
  
 
 80
Net Income 114
  145
 373
 500
Less: Net income attributable to noncontrolling interest 
  14
 20
 18
Net Income Attributable to Southern Company Gas $114
  $131
 $353
 $482
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Southern Company Gas and Subsidiary Companies 2016 Annual Report

  Successor  Predecessor
  July 1, 2016 through December 31,  January 1, 2016 through June 30, 
For the years ended
December 31,
  2016  2016 2015 2014
  (in millions)  (in millions)
Net Income $114
  $145
 $373
 $500
Other comprehensive income (loss):         
Qualifying hedges:         
Changes in fair value, net of tax of
$(1), $(23), $(3), and $(2), respectively
 (1)  (41) 
 (6)
Reclassification adjustment for amounts included
in net income, net of tax of $-, $-, $1, and $(2),
respectively
 
  1
 8
 (3)
Pension and other postretirement benefit plans:         
Benefit plan net gain (loss), net of tax of
$19, $-, $-, and $(48), respectively
 27
  
 
 (71)
Reclassification adjustment for amounts included
in net income, net of tax of $-, $4, $9, and $5,
respectively
 
  5
 12
 8
Total other comprehensive income (loss) 26
  (35) 20
 (72)
Less: Comprehensive income attributable to
   noncontrolling interest
 
  14
 20
 16
Comprehensive Income Attributable
   to Southern Company Gas
 $140
  $96
 $373
 $412
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF CASH FLOWS
Southern Company Gas and Subsidiary Companies 2016 Annual Report
  Successor  Predecessor
  July 1, 2016 through December 31,  January 1, 2016 through June 30, 
For the years ended
December 31,
  2016  2016 2015 2014
  (in millions)  (in millions)
Operating Activities:         
Net income $114
  $145
 $373
 $500
Adjustments to reconcile net income to net cash
provided from (used for) operating activities —
         
Depreciation and amortization, total 238
  206
 397
 380
Deferred income taxes 92
  8
 211
 199
Pension, postretirement, and other employee benefits 6
  5
 24
 19
Pension and postretirement funding (125)  
 
 
Stock based compensation expense 20
  20
 34
 19
Hedge settlements (35)  (26) 
 
Goodwill impairment 
  
 14
 
Mark-to-market adjustments (3)  162
 22
 (155)
Loss on discontinued operations, net of tax 
  
 
 80
Other, net (78)  (82) 43
 (28)
Changes in certain current assets and liabilities —         
-Receivables (490)  181
 615
 (53)
-Natural gas for sale (226)  273
 72
 (58)
-Prepaid income taxes (23)  151
 23
 (175)
-Other current assets (31)  37
 (11) 44
-Accounts payable 194
  43
 (434) 25
-Accrued taxes 8
  41
 (20) (66)
-Accrued compensation (13)  (21) (6) 31
-Other current liabilities 24
  (30) 24
 (97)
Net cash used for operating activities
of discontinued operations
 
  
 
 (10)
Net cash provided from (used for) operating activities (328)  1,113
 1,381
 655
Investing Activities:         
Property additions (614)  (509) (961) (702)
Cost of removal, net of salvage (40)  (32) (84) (39)
Change in construction payables, net 22
  (7) 18
 (28)
Investment in unconsolidated subsidiaries (1,444)  (14) (12) (3)
Disposition of assets 
  
 
 230
Other investing activities 9
  3
 12
 50
Net cash used for investing activities
of discontinued operations
 
  
 
 (13)
Net cash used for investing activities (2,067)  (559) (1,027) (505)
Financing Activities:         
Increase (decrease) in notes payable, net 1,143
  (896) (165) 4
Proceeds —         
First mortgage bonds 
  250
 
 
Capital contributions from parent company 1,085
  
 
 
Senior notes 900
  350
 250
 
Redemptions and repurchases —         
First mortgage bonds 
  (125) 
 
Senior notes (420)  
 (200) 
Distribution to noncontrolling interest (15)  (19) (18) (17)
Purchase of 15% noncontrolling interest in SouthStar (160)  
 
 
Payment of common stock dividends (126)  (128) (244) (233)
Other financing activities (8)  10
 11
 22
Net cash provided from (used for) financing activities 2,399
  (558) (366) (224)
Net Change in Cash and Cash Equivalents —
   Continuing Operations
 4
  (4) (12) (51)
Net Change in Cash and Cash Equivalents —
   Discontinued Operations
 
  
 
 (23)
Cash and Cash Equivalents at Beginning of Period 15
  19
 31
 105
Cash and Cash Equivalents at End of Period $19
  $15
 $19
 $31
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
Southern Company Gas and Subsidiary Companies 2016 Annual Report

  Successor  Predecessor
Assets December 31, 2016  December 31, 2015
  (in millions)  (in millions)
Current Assets:     
Cash and cash equivalents $19
  $19
Receivables —     
Energy marketing receivable 623
  445
Customer accounts receivable 364
  316
Unbilled revenues 239
  140
Other accounts and notes receivable 76
  68
Accumulated provision for uncollectible accounts (27)  (29)
Materials and supplies 26
  29
Natural gas for sale 631
  622
Prepaid income taxes 24
  151
Prepaid expenses 55
  67
Assets from risk management activities, net of collateral 128
  206
Other regulatory assets, current 81
  68
Other current assets 11
  13
Total current assets 2,250
  2,115
Property, Plant, and Equipment:     
In service 14,508
  12,152
Less accumulated depreciation 4,439
  2,775
Plant in service, net of depreciation 10,069
  9,377
Construction work in progress 496
  414
Total property, plant, and equipment 10,565
  9,791
Other Property and Investments:     
Goodwill 5,967
  1,813
Equity investments in unconsolidated subsidiaries 1,541
  80
Other intangible assets, net of amortization of $34 and $68
at December 31, 2016 and December 31, 2015, respectively
 366
  109
Miscellaneous property and investments 21
  23
Total other property and investments 7,895
  2,025
Deferred Charges and Other Assets:     
Other regulatory assets, deferred 973
  670
Other deferred charges and assets 170
  153
Total deferred charges and other assets 1,143
  823
Total Assets $21,853
  $14,754
The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED BALANCE SHEETS
Southern Company Gas and Subsidiary Companies 2016 Annual Report

  Successor  Predecessor
Liabilities and Stockholders' Equity December 31, 2016  December 31, 2015
  (in millions)  (in millions)
Current Liabilities:     
Securities due within one year $22
  $545
Notes payable 1,257
  1,010
Energy marketing trade payables 597
  418
Accounts payable 348
  255
Customer deposits 153
  165
Accrued taxes —     
Accrued income taxes 26
  13
Other accrued taxes 68
  46
Accrued interest 48
  49
Accrued compensation 58
  92
Liabilities from risk management activities, net of collateral 62
  44
Other regulatory liabilities, current 102
  134
Accrued environmental remediation, current 69
  67
Other current liabilities 108
  162
Total current liabilities 2,918
  3,000
Long-term Debt (See notes)
 5,259
  3,275
Deferred Credits and Other Liabilities:     
Accumulated deferred income taxes 1,975
  1,912
Employee benefit obligations 441
  515
Other cost of removal obligations 1,616
  1,538
Accrued environmental remediation, deferred 357
  364
Other regulatory liabilities, deferred 51
  53
Other deferred credits and liabilities 127
  122
Total deferred credits and other liabilities 4,567
  4,504
Total Liabilities 12,744
  10,779
Common Stockholders' Equity (See accompanying statements)
 9,109
  3,975
Total Liabilities and Stockholders' Equity $21,853
  $14,754
Commitments and Contingent Matters (See notes)
 
  
The accompanying notes are an integral part of these consolidated financial statements.


CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
Southern Company Gas and Subsidiary Companies 2016 Annual Report
 Southern Company Gas Common Stockholders' Equity   
 Number of Common Shares Common Stock   
Accumulated
Other
Comprehensive Income
(Loss)
 
Noncontrolling
Interests
 
 Issued Treasury Par Value Paid-In Capital Treasury Retained Earnings  Total
 (in thousands) (in millions)
Predecessor –
Balance at December 31, 2013
118,889
 217
 $595
 $2,054
 $(8) $1,063
 $(136) $45
$3,613
Consolidated net income
   attributable to
   Southern Company Gas

 
 
 
 
 482
 
 
482
Other comprehensive income (loss)
 
 
 
 
 
 (70) (2)(72)
Stock issued236
 
 1
 11
 
 
 
 
12
Stock-based compensation522
 
 3
 22
 
 
 
 
25
Cash dividends on common stock
 
 
 
 
 (233) 
 
(233)
Distribution to
   noncontrolling interest(*)

 
 
 
 
 
 
 (17)(17)
Net income attributable
   to noncontrolling interest (*)

 
 
 
 
 
 
 18
18
Predecessor –
Balance at December 31, 2014
119,647
 217
 599
 2,087
 (8) 1,312
 (206) 44
3,828
Consolidated net income
   attributable to
   Southern Company Gas

 
 
 
 
 353
 
 
353
Other comprehensive income
 
 
 
 
 
 20
 
20
Stock issued221
 
 1
 11
 
 
 
 
12
Stock-based compensation509
 
 3
 1
 
 
 
 
4
Cash dividends on common stock
 
 
 
 
 (244) 
 
(244)
Distribution to
   noncontrolling interest(*)

 
 
 
 
 
 
 (18)(18)
Net income attributable
   to noncontrolling interest(*)

 
 
 
 
 
 
 20
20
Predecessor –
Balance at December 31, 2015
120,377
 217
 603
 2,099
 (8) 1,421
 (186) 46
3,975
Consolidated net income
   attributable to
   Southern Company Gas

 
 
 
 
 131
 
 
131
Other comprehensive income (loss)
 
 
 
 
 
 (35) 
(35)
Stock issued95
 
 
 6
 
 
 
 
6
Stock-based compensation270
 
 2
 28
 
 
 
 
30
Cash dividends on common stock
 
 
 
 
 (128) 
 
(128)
Reclassification of
   noncontrolling interest(*)

 
 
 
 
 
 
 (46)(46)
Predecessor –
Balance at June 30, 2016
120,742
 217
 $605
 $2,133
 $(8) $1,424
 $(221) $
$3,933
Successor –
Balance at July 1, 2016

 
 
 8,001
 
 
 
 
8,001
Consolidated net income
   attributable to
   Southern Company Gas

 
 
 
 
 114
 
 
114
Capital contributions from
   parent company

 
 
 1,085
 
 
 
 
1,085
Other comprehensive income
 
   
 
 
 26
 
26
Stock-based compensation
 
 
 9
 
 
 
 
9
Cash dividends on common stock
 
 
 
 
 (126) 
 
(126)
Successor –
Balance at December 31, 2016

 
 $
 $9,095
 $
 $(12) $26
 $
$9,109
(*)Associated with SouthStar. See Note 4 to the financial statements for additional information.
The accompanying notes are an integral part of these consolidated financial statements. 

NOTES TO FINANCIAL STATEMENTS
Southern Company Gas and Subsidiary Companies 2016 Annual Report




Index to the Notes to Financial Statements


NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
General
On July 1, 2016, Southern Company and Southern Company Gas (formerly known as AGL Resources Inc.) (together with its subsidiaries, the Company) completed the Merger and Southern Company Gas became a wholly-owned, direct subsidiaryboth of Southern Company and, on July 11, 2016, changed its name to Southern Company Gas. In addition to the Company, Southern Company is the parent company of four traditional electric operating companies, Southern Power, Southern Company Services, Inc. (SCS), Southern LINC, Southern Company Holdings, Inc. (Southern Holdings), Southern Nuclear, PowerSecure, Inc., and other direct and indirect subsidiaries. Southern Company Gas is an energy services holding company whose primary business is the distribution of natural gas across seven states through its seven natural gas distribution utilities. The Company also is involved in several other businesses that are complementary to the distribution of natural gas. The traditional electric operating companies – Alabama Power Company, Georgia Power Company, Gulf Power Company, and Mississippi Power Company – are vertically integrated utilities providing electric service in four Southeastern states. Southern Power constructs, acquires, owns, and manages generation assets, including renewable energy projects, and sells electricity at market-based rates in the wholesale market. SCS, the system service company, provides, at cost, specialized services to Southern Company and its subsidiary companies. Southern LINC provides digital wireless communications for use by Southern Company and its subsidiary companies and also markets these services to the public and provides fiber cable services within the Southeast. Southern Holdings is an intermediate holding company subsidiary, primarily for Southern Company'sGas' investments in leveraged leases and for other electric services. Southern Nuclear operates and provides services to the Southern Company system's nuclear power plants. PowerSecure, Inc. is a provider of products and services in the areas of distributed generation, energy efficiency, and utility infrastructure.
The financial statements reflect the Company's investments in its subsidiaries on a consolidated basis. The equity method is used for subsidiaries in which the Company has significant influence but does not control and for VIEs where the Company has an equity investment, but is not the primary beneficiary. Intercompany transactions have been eliminated in consolidation.
The seven natural gas distribution utilities are subject to regulation by the regulatory agencies of each state in which they operate. As such, the Company's financial statements reflect the effects of rate regulation in accordance with GAAP and comply with the accounting policies and practices prescribed by its regulatory commissions. The preparation of financial statements in conformity with GAAP requires the use of estimates, and the actual results may differ from those estimates.
Pursuant to the Merger, Southern Company has pushed down the application of the acquisition method of accounting to the consolidated financial statements of the Company such that the assets and liabilities are recorded at their respective fair values, and goodwill has been established for the excess of the purchase price over the fair value of net identifiable assets. Accordingly, the consolidated financial statements of the Company for periods before and after July 1, 2016 (acquisition date) reflect different bases of accounting, and the financial positions and results of operations of those periods are not comparable. Throughout the consolidated financial statements and notes to the financial statements, periods prior to July 1, 2016 are identified as "predecessor," while periods after the acquisition date are identified as "successor."
Certain predecessor period data presented in the financial statements has been modified or reclassified to conform to the presentation used by the Company's new parent company, Southern Company. Changes to the consolidated statements of income include classifying operating revenues as natural gas revenues and other revenues as well as classifying cost of goods sold as cost of natural gas and cost of other sales, and presenting interest expense and AFUDC on a gross basis. Changes to the consolidated statements of cash flows include revised financial statement line item descriptions to align with the new balance sheet descriptions and expanded line items within each category of cash flow activity. Changes to the consolidated balance sheets include changing certain captions to conform to the presentation of Southern Company.
Recently Issued Accounting Standards
In 2014, the FASB issued ASC 606, Revenue from Contracts with Customers, replacing the existing accounting standard and industry specific guidance for revenue recognition with a five-step model for recognizing and measuring revenue from contracts with customers. The underlying principle of the guidance is to recognize revenue to depict the transfer of goods or services to customers at the amount expected to be collected. The new standard also requires enhanced disclosures regarding the nature, amount, timing, and uncertainty of revenue and the related cash flows arising from contracts with customers.
While the Company expects most of its revenue to be included in the scope of ASC 606, it has not fully completed its evaluation of such arrangements. The majority of the Company's revenue, including energy provided to customers, is from tariff offerings that provide natural gas without a defined contractual term. For such arrangements, the Company generally expects that the revenue from contracts with these customers will continue to be equivalent to the natural gas supplied and billed in that period

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


(including unbilled revenues) and the adoption of ASC 606 will not result in a significant shift in the timing of revenue recognition for such sales.
The Company's ongoing evaluation of other revenue streams and related contracts includes longer term contractual commitments and unregulated sales to customers. Some revenue arrangements, such as certain alternative revenue programs, are expected to be excluded from the scope of ASC 606 and therefore, be accounted for and presented separately from revenues under ASC 606 on the Company's financial statements. In addition, the power and utilities industry is currently addressing other specific industry issues, including the applicability of ASC 606 to contributions in aid of construction (CIAC). If final implementation guidance indicates CIAC will be accounted for under ASC 606 and offsetting regulatory treatment is not permitted, it could have a material impact on theSouthern Company's and Southern Company Gas' financial statements. Southern Company Gas evaluated its investments and determined there was 0 impairment as of December 31, 2019.
The new standard is effectiveSee Note 3 under "Guarantees" and Note 7 under "Southern Company Gas" for interimadditional information.
Natural Gas Storage Facilities
A wholly-owned subsidiary of Southern Company Gas owns and annual reporting periods beginning after December 15, 2017. The Company must selectoperates a transition method to be applied either retrospectively to each prior reporting period presented or retrospectivelynatural gas storage facility consisting of 2 salt dome caverns in Louisiana. Periodic integrity tests are required in accordance with a cumulative effect adjustment to retained earnings at the date of initial adoption. As the ultimate impactrules of the new standard hasLouisiana Department of Natural Resources (DNR). In 2017, in connection with an ongoing integrity project, updated seismic mapping indicated the proximity of one of the caverns to the edge of the salt dome may be less than the required minimum and could result in Southern Company Gas retiring the cavern early.
In the third quarter 2019, management determined that it no longer planned to obtain the core samples during 2020 that are necessary to determine the composition of the sheath surrounding the edge of the salt dome. Core sampling is a requirement of the Louisiana DNR to put the cavern back in service; as a result, the cavern will not yet been determined,return to service by 2021. This change in plan, which affects the Company has not elected its transition method.
On November 20, 2015,future operation of the FASB issued ASU No. 2015-17, Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes (ASU 2015-17), which simplifies the presentation of deferred income taxes. ASU 2015-17 requires deferred tax assets and liabilities to be presented as non-currententire storage facility, resulted in a classified balance sheetpre-tax impairment charge of $91 million ($69 million after-tax) recorded by Southern Company Gas in 2019. Southern Company Gas continues to monitor the pressure and is effectiveoverall structural integrity of the entire facility pending any future decisions regarding decommissioning.
Southern Company Gas has 2 other natural gas storage facilities located in California and Texas, which could be impacted by ongoing changes in the U.S. natural gas storage market. Recent sales of natural gas storage facilities have resulted in losses for fiscal years beginning after December 15, 2016, including interim periods within that reporting period. As permitted, the Company elected to early adopt the guidance in 2016. Prior to the adoption of ASU 2015-17, all deferred income tax assetssellers and liabilities were required to be separated into current and non-current amounts. The adoption of ASU 2015-17 did not havemay imply an impact on the resultsfuture rates and/or asset values. Sustained diminished natural gas storage values could trigger impairment of operations, cash flows,either or financial conditionboth of the Company.
On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize on the balance sheet a lease liability and a right-of-use asset for all leases. ASU 2016-02 also changes the recognition, measurement, and presentation of expense associated with leases and provides clarification regarding the identification of certain components of contracts that would represent a lease. The accounting required by lessors is relatively unchanged and there is no change to the accounting for existing leveraged leases. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, with early adoption permitted. The Company is currently evaluating the new standard and has not yet determined its ultimate impact; however, adoption of ASU 2016-02 is expected tothese natural gas storage facilities, which have a significant impact on the Company's balance sheet.combined net book value of $326 million at December 31, 2019.
On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). ASU 2016-09 changes the accounting for income taxes and the cash flow presentation for share-based payment award transactions effective for fiscal years beginning after December 15, 2016. The new guidance requires all excess tax benefits and deficiencies related to the exercise or vestingultimate outcome of stock compensation tothese matters cannot be recognized as income tax expense or benefit in the income statement. Previously, the Company recognized any excess tax benefits and deficiencies related to the exercise and vesting of stock compensation as additional paid-in capital. In addition, the new guidance requires excess tax benefits for share-based payments to be included in net cash provided from operating activities rather than net cash provided from financing activities on the statement of cash flows. The Company elected to adopt the guidance in 2016 and reflect the related adjustments as of January 1, 2016. Prior year's data presented in the financial statements has not been adjusted. The Company also elected to recognize forfeitures as they occur. The new guidance did not have a material impact on the results of operations, financial position, or cash flows of the Company. See Note 5 for the disclosure impacted by ASU 2016-09.
On October 24, 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory (ASU 2016-16). Current GAAP prohibits the recognition of current and deferred income taxes for an affiliate asset transfer until the asset has been sold to an outside party. ASU 2016-16 requires an entity to recognize the income tax consequences of an affiliate transfer of an asset other than inventory when the transfer occurs. ASU 2016-16 is effective for annual reporting periods beginning after December 15, 2017 and interim periods within those annual periods. The amendments will be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of the standard on its financial statements.
On November 17, 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash (ASU 2016-18). ASU 2016-18 eliminates the need to reflect transfers between cash and restricted cash in operating, investing, and financing activities in the statement of cash flows. Upon adoption, the net change in cash and cash equivalents during the period will include amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017, with early adoption permitted, and will be applied retrospectively to each period presented. The Company does not intend to adopt the guidance early. The adoption of ASU 2016-18 will notdetermined at this time, but could have a material impact on the financial statements of the Company.Southern Company and Southern Company Gas.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Commitments
To supply a portion of the fuel requirements of the Southern Company system's electric generating plants, the Southern Company system has entered into various long-term commitments not recognized on the balance sheets for the procurement and delivery of fossil fuel and, for Alabama Power and Georgia Power, nuclear fuel. The majority of the Registrants' fuel expense for the periods presented was purchased under long-term commitments. Each Registrant expects that a substantial amount of its future fuel needs will continue to be purchased under long-term commitments.
Georgia Power has commitments, in the form of capacity purchases, regarding a portion of a 5% interest in the original cost of Plant Vogtle Units 1 and 2 owned by MEAG Power that are in effect until the later of the retirement of the plant or the latest stated maturity date of MEAG Power's bonds issued to finance such ownership interest. The payments for capacity are required whether or not any capacity is available. Portions of the capacity payments made to MEAG Power for its Plant Vogtle Units 1 and 2 investment relate to costs in excess of Georgia Power's allowed investment for ratemaking purposes. The present value of these portions at the time of the disallowance was written off. Generally, the cost of such capacity is included in purchased power in Southern Company's statements of income and in purchased power, non-affiliates in Georgia Power's statements of income. Georgia Power's capacity payments related to this commitment totaled $6 million, $8 million, and $9 million in 2019, 2018, and 2017, respectively. At December 31, 2019, Georgia Power's estimated long-term obligations related to this commitment totaled $56 million, consisting of $5 million for 2020, $5 million for 2021, $4 million for 2022, $3 million for 2023, $4 million for 2024, and $35 million for 2025 and thereafter.
See Note 9 for information regarding PPAs accounted for as leases.
Southern Company Gas has commitments for pipeline charges, storage capacity, and Subsidiary Companies 2016 Annual Report


Affiliate Transactions
Priorgas supply, including charges recoverable through natural gas cost recovery mechanisms or, alternatively, billed to the Company's completionmarketers selling retail natural gas, as well as demand charges associated with Southern Company Gas' wholesale gas services. Gas supply commitments include amounts for gas commodity purchases associated with Southern Company Gas' gas marketing services of 45 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2019 and valued at $84 million. Southern Company Gas provides guarantees to certain gas suppliers for certain of its acquisitionsubsidiaries in support of a 50% equity interest in SNG,payment obligations. Southern Company Gas' expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the Company enteredbalance sheets at December 31, 2019 were as follows:
 Pipeline Charges, Storage Capacity, and Gas Supply
 (in millions)
2020$725
2021559
2022526
2023454
2024330
2025 and thereafter1,677
Total$4,271

Guarantees
SCS may enter into a long-term interstatevarious types of wholesale energy and natural gas transportation agreement with SNG. The interstate transportation service provided to the Company by SNG pursuant to this agreement is governed by the terms and conditions of SNG's natural gas tariff and is subject to FERC regulation. For the period subsequent to the Company's investment in SNG, transportation costs paid to SNG by the Company were approximately $15 million. See Note 4 herein under "Equity Method Investments – SNG" for additional information regarding the Company's investment in SNG.
The Company hascontracts acting as an agreement with SCS under which the following services are currently being rendered to the Company as direct or allocated cost: accounting, finance and treasury, tax, information technology, auditing, insurance and pension administration, human resources, systems and procedures, purchasing, and other services. For the successor period of July 1, 2016 through December 31, 2016, costs for these services amounted to $17 million.
SouthStar and Sequent each have agreements under which they sell natural gas to SCS, as agent for the traditional electric operating companies and Southern Power. ForUnder these agreements, each of the successor periodtraditional electric operating companies and Southern Power may be jointly and severally liable. Accordingly, Southern Company has entered into keep-well agreements with each of July 1, 2016 throughthe traditional electric operating companies to ensure they will not subsidize or be responsible for any costs, losses, liabilities, or damages resulting from the inclusion of Southern Power as a contracting party under these agreements.
Alabama Power has guaranteed a $100 million principal amount long-term bank loan entered into by SEGCO in November 2018. Georgia Power has agreed to reimburse Alabama Power for the portion of such obligation corresponding to Georgia Power's proportionate ownership of SEGCO's stock if Alabama Power is called upon to make such payment under its guarantee. At December 31, 2016,2019, the capitalization of SEGCO consisted of $87 million of equity and $100 million of long-term debt, on which the annual interest requirement is derived from a variable rate index. In addition, SEGCO had short-term debt outstanding of $26 million. See Note 7 under "SEGCO" for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In 2017, Atlantic Coast Pipeline executed a $3.4 billion revolving credit facility with a stated maturity date of October 2021. Southern Company Gas entered into a guarantee agreement to support its share of the revolving credit facility. Southern Company Gas' maximum exposure to loss under the terms of the guarantee is limited to 5% of the outstanding borrowings under the credit facility, and totaled $88 million as of December 31, 2019. See "Other MattersSouthern Company GasGas Pipeline Projects" herein and Note 7 under "Southern Company Gas" for additional information regarding the Atlantic Coast Pipeline.
As discussed in Note 9, Alabama Power and Georgia Power have entered into certain residual value guarantees related to railcar leases.
4. REVENUE FROM CONTRACTS WITH CUSTOMERS
The Registrants generate revenues from a variety of sources, some of which are not accounted for as revenue from these agreements totaled $9 millioncontracts with customers, such as leases, derivatives, and $19 million,certain cost recovery mechanisms. ASC 606 became effective on January 1, 2018 and the Registrants adopted it using the modified retrospective method applied to open contracts and only to the version of contracts in effect as of January 1, 2018. In accordance with the modified retrospective method, the Registrants' previously issued financial statements have not been restated to comply with ASC 606 and the Registrants did not have a cumulative-effect adjustment to retained earnings. See Note 1 under "Revenues" for additional information on the revenue policies of the Registrants. See Notes 9 and 14 for additional information on revenue accounted for under lease and derivative accounting guidance, respectively.
Regulatory Assets

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and LiabilitiesSubsidiary Companies 2019 Annual Report

The Company is subject to accounting requirementsfollowing tables disaggregate revenue from contracts with customers for the effects of rate regulation. Regulatory assets represent probable future revenues associated with certain costs that are expected to be recovered from customers through the ratemaking process. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process.
Regulatory assets2019 and (liabilities) reflected in the balance sheets at December 31 relate to:2018:
 Successor  Predecessor
 2016  2015 Note
 (in millions)  (in millions)  
Deferred income tax credits$(22)  $(27) (a)
Long-term debt fair value adjustment154
  66
 (b)
Environmental remediation - asset411
  401
 (h)
Under recovered regulatory clause revenues118
  69
 (c)
Financial instrument hedging - asset
  30
 (d,h)
Other regulatory assets58
  47
 (e)
Other cost of removal obligations(1,616)  (1,591) (a)
Financial instrument hedging - liability(21)  
 (d,h)
Other regulatory liabilities(18)  (20) (f)
Retiree benefit plans325
  125
 (g,h)
Over recovered regulatory clause revenues(104)  (87) (c)
Total regulatory assets (liabilities), net$(715)  $(987)  
Note: The recovery and amortization periods for these regulatory assets and (liabilities) are as follows:
2019Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Operating revenues      
Retail electric revenues      
Residential$6,164
$2,509
$3,377
$278
$
$
Commercial5,065
1,677
3,097
291


Industrial3,126
1,460
1,360
306


Other90
25
54
11


Total retail electric revenues14,445
5,671
7,888
886


Natural gas distribution revenues      
Residential1,413




1,413
Commercial389




389
Transportation907




907
Industrial35




35
Other245




245
Total natural gas distribution revenues2,989




2,989
Wholesale electric revenues      
PPA energy revenues833
145
60
11
648

PPA capacity revenues453
102
54
3
322

Non-PPA revenues232
81
9
352
238

Total wholesale electric revenues1,518
328
123
366
1,208

Other natural gas revenues      
Gas pipeline investments32




32
Wholesale gas services2,095




2,095
Gas marketing services440




440
Other natural gas revenues42




42
Total natural gas revenues2,609




2,609
Other revenues1,035
153
407
19
12

Total revenue from contracts with customers22,596
6,152
8,418
1,271
1,220
5,598
Other revenue sources(a)
4,266
(27)(10)(7)718
3,637
Other adjustments(b)
(5,443)



(5,443)
Total operating revenues$21,419
$6,125
$8,408
$1,264
$1,938
$3,792
(a)Deferred income tax assetsOther revenue sources primarily relate to revenues from customers accounted for as derivatives and liabilities are amortized overleases, as well as alternative revenues program at Southern Company Gas and other cost recovery mechanisms at the related property lives, which range up to 30 years.traditional electric operating companies.
(b)Recovered over
Other adjustments relate to the remaining lifecost of Southern Company Gas' energy and risk management activities. Wholesale gas services revenues are presented net of the original debt issuances, which range uprelated costs of those activities on the statement of income. See Note 16 under "Southern Company Gas" for additional information on the components of wholesale gas services' operating revenues.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2018Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Operating revenues      
Retail electric revenues      
Residential$6,586
$2,285
$3,295
$277
$
$
Commercial5,255
1,541
3,025
290


Industrial3,152
1,364
1,321
326


Other94
25
56
9


Total retail electric revenues15,087
5,215
7,697
902


Natural gas distribution revenues      
Residential1,525




1,525
Commercial436




436
Transportation944




944
Industrial40




40
Other230




230
Total natural gas distribution revenues3,175




3,175
Wholesale electric revenues      
PPA energy revenues950
158
81
15
727

PPA capacity revenues498
101
53
6
394

Non-PPA revenues263
119
24
329
230

Total wholesale electric revenues1,711
378
158
350
1,351

Other natural gas revenues      
Gas pipeline investments32




32
Wholesale gas services3,083




3,083
Gas marketing services571




571
Other natural gas revenues53




53
Total other natural gas revenues3,739




3,739
Other revenues1,529
210
236
22
13

Total revenue from contracts with customers25,241
5,803
8,091
1,274
1,364
6,914
Other revenue sources(a)
5,108
229
329
(9)841
3,849
Other adjustments(b)
(6,854)



(6,854)
Total operating revenues$23,495
$6,032
$8,420
$1,265
$2,205
$3,909
(a)Other revenue sources primarily relate to 22 years.revenues from customers accounted for as derivatives and leases, as well as alternative revenues program at Southern Company Gas and other cost recovery mechanisms at the traditional electric operating companies.
(c)(b)Recorded
Other adjustments relate to the cost of Southern Company Gas' energy and recovered or amortized as approved or accepted by the applicable state regulatory agencies over periods not exceeding nine years.
(d)Financial instrument-hedging assets and liabilitiesrisk management activities. Wholesale gas services revenues are recorded over the lifepresented net of the underlying hedged purchase contracts, which generally do not exceed two years. Upon final settlement, actualrelated costs incurred are recovered, and actual income earned is refunded throughof those activities on the energy cost recovery clause.
(e)Comprisedstatement of several components including unamortized loss on reacquired debt, weather normalization, franchise gas, and deferred depreciation expense, which are recovered or amortized as approved by the applicable state regulatory agencies over periods generally not exceeding ten years.
(f)Comprised of several components including energy efficiency programs and unamortized bond issuance costs which are recovered or amortized as approved by the applicable state regulatory agencies over periods generally not exceeding four years.
(g)Recovered and amortized over the average remaining service period which range up to 11 years.income. See Note 216 under "Southern Company Gas" for additional information.
(h)Not earning a return as offset in rate base by a corresponding asset or liability.information on the components of wholesale gas services' operating revenues.
In the event that a portion of its operations is no longer subject to applicable accounting rules for rate regulation, the Company would be required to write off to income related regulatory assets and liabilities that are not specifically recoverable through regulated rates. In addition, the Company would be required to determine if any impairment to other assets, including plant, exists


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



and write downContract Balances
The following table reflects the assets, if impaired, to their fair values. All regulatoryclosing balances of receivables, contract assets, and contract liabilities arerelated to be reflectedrevenues from contracts with customers at December 31, 2019 and 2018:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Accounts Receivables      
As of December 31, 2019$2,413
$586
$688
$79
$97
$749
As of December 31, 20182,630
520
721
100
118
952
Contract Assets      
As of December 31, 2019$117
$
$69
$
$
$
As of December 31, 2018102

58



Contract Liabilities      
As of December 31, 2019$52
$10
$13
$
$1
$1
As of December 31, 201832
12
7

11
2
As of December 31, 2019 and 2018, Georgia Power had contract assets primarily related to fixed retail customer bill programs, where the payment is contingent upon Georgia Power's continued performance and the customer's continued participation in rates. See Note 3 under "Regulatory Matters"the program over the one-year contract term, and unregulated service agreements, where payment is contingent on project completion. Alabama Power had contract liabilities for additional information.
Revenues
Gas Distribution Operationsoutstanding performance obligations primarily related to extended service agreements. Contract liabilities for Georgia Power and Southern Power relate to cash collections recognized in advance of revenue for certain unregulated service agreements and certain levelized PPAs, respectively. Southern Company's unregulated distributed generation business had contract assets of $40 million and $39 million at December 31, 2019 and 2018, respectively, and contract liabilities of $28 million and $11 million at December 31, 2019 and 2018, respectively, for outstanding performance obligations.
The Company records revenues when goods or services are provided to customers. Those revenues are based on rates approved by the state regulatory agencies of the Company's utilities. As required by the Georgia PSC, Atlanta Gas Light bills Marketers in equal monthly installments for each residential, commercial, and industrial end-use customer's distribution costs as well as for capacity costs utilizing a seasonal rate design for the calculation of each residential end-use customer's annual straight-fixed-variable charge, whichfollowing table reflects the historic volumetric usage pattern for the entire residential class.
All of the natural gas utilities,revenue from contracts with the exception of Atlanta Gas Light, have rate structures that include volumetric rate designs that allow the opportunity to recover certain costs based on gas usage. Revenues from sales and transportation services arecustomers recognized in the same period in which the related volumes are delivered to customers. Revenues from residential and certain commercial and industrial customers are recognized on the basis of scheduled meter readings. Additionally, unbilled revenues are recognized for estimated deliveries of gas not yet billed to these customers, from the last bill date to the end of the accounting period. For other commercial and industrial customers and for all wholesale customers, revenues are based on actual deliveries to the end of the period.
The tariffs for Virginia Natural Gas, Elizabethtown Gas, and Chattanooga Gas contain weather normalization adjustments (WNAs) that partially mitigate the impact of unusually cold or warm weather on customer billings and natural gas revenues. The WNAs have the effect of reducing customer bills when winter weather is colder than normal and increasing customer bills when weather is warmer than normal. In addition, the tariffs for Virginia Natural Gas, Chattanooga Gas, and Elkton Gas contain revenue normalization mechanisms that mitigate the impact of conservation and declining customer usage. The WNAs and revenue normalization mechanisms are alternative revenue programs, which allow recognition of revenue prior to billing as long as the amounts will be collected within 24 months of recognition.
Revenue Taxes
The Company charges customers for gas revenue and gas use taxes imposed on the Company and remits amounts owed to various governmental authorities. Gas revenue taxes are recorded at the amount charged to customers, which may include a small administrative fee, as operating revenues, and the related taxes imposed on the Company are recorded as operating expenses on the statements of income. Gas use taxes are excluded from revenue and expense with the related administrative fee2019 included in operating revenues when the tax is imposed on the customer. Revenue taxes included in operating expenses were $31 million for the successor period of July 1, 2016 throughcontract liability at December 31, 2016 and $56 million, $101 million, and $130 million for the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, respectively.
Gas Marketing Services
The Company recognizes revenues from natural gas sales and transportation services in the same period in which the related volumes are delivered to customers and recognizes sales revenues from residential and certain commercial and industrial customers on the basis of scheduled meter readings. The Company also recognizes unbilled revenues for estimated deliveries of gas not yet billed to these customers from the most recent meter reading date to the end of the accounting period. For other commercial and industrial customers and for all wholesale customers, revenues are based on actual deliveries during the period.
The Company recognizes revenues on 12-month utility-bill management contracts as the lesser of cumulative earned or cumulative billed amounts. Revenues for warranty and repair contracts are recognized on a straight-line basis over the contract term while revenues for maintenance services are recognized at the time such services are performed.
Wholesale Gas Services
The Company nets revenues from energy and risk management activities with the associated costs. Profits from sales between segments are eliminated and are recognized as goods or services sold to end-use customers. The Company records transactions that qualify as derivatives at fair value with changes in fair value recognized in earnings in the period of change and characterized as unrealized gains or losses. Gains and losses on derivatives held for energy trading purposes are presented on a net basis in revenue.2018:
 Southern CompanyAlabama PowerGeorgia PowerSouthern PowerSouthern Company Gas
 (in millions)
Revenue Recognized     
2019$30
$11
$6
$11
$2



COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



Concentration of RevenueRemaining Performance Obligations
The Companytraditional electric operating companies and Southern Power have long-term contracts with customers in which revenues are recognized as performance obligations are satisfied over the contract term. These contracts primarily relate to PPAs whereby the traditional electric operating companies and Southern Power provide electricity and generation capacity to a customer. The revenue recognized for the delivery of electricity is variable; however, certain PPAs include a fixed payment for fixed generation capacity over the term of the contract. Southern Company's unregulated distributed generation business also has a diversified base of customers. No single customer or industry comprises 10% or more of revenues. For all periods presented, uncollectible accounts averaged less than 1% of revenues.
Cost of Natural Gas and Other Sales
Gas Distribution Operations
Excluding Atlanta Gas Light, which does not sell natural gaspartially satisfied performance obligations related to end-usecertain fixed price contracts. Revenues from contracts with customers the Company charges its utility customers for natural gas consumed using natural gas cost recovery mechanisms set by the applicable state regulatory agencies. Under these mechanisms, all prudently incurred natural gas costs are passed through to customers without markup, subject to regulatory review. The Company defers or accrues the difference between the actual cost of natural gas and the amount of commodity revenue earned in a given period such that no operating income is recognized related to these costs. The deferred or accrued amount is either billed or refunded to customers prospectively through adjustments to the commodity rate. Deferred and accrued natural gas costsperformance obligations remaining at December 31, 2019 are included in the consolidated balance sheets as regulatory assets and regulatory liabilities, respectively.
Gas Marketing Services
The Company's gas marketing services' customers are charged for actual or estimated natural gas consumed. Within cost of natural gas, the Company also includes costs of fuel and lost and unaccounted for gas, adjustments to reduce the value of inventories to market value, and gains and losses associated with certain derivatives. The Company records the costs to service its warranty and repair contract claims as cost of other sales.
Income and Other Taxes
The Company uses the liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. Federal ITCs utilized are deferred and amortized to income over the average life of the related property. Taxes that are collected from customers on behalf of governmental agenciesexpected to be remittedrecognized as follows:
 202020212022202320242025 and
Thereafter
 (in millions)
Southern Company$490
$430
$336
$324
$323
$2,108
Alabama Power21
25
22
22
22
118
Georgia Power60
49
32
32
23
61
Southern Power287
280
281
271
279
1,948

Revenue expected to these agencies are presented on the balance sheet, excluding revenue taxes which are presented on the statements of income. See "Revenues – Gas Distribution Operations – Revenue Taxes" hereinbe recognized for additional information.performance obligations remaining at December 31, 2019 was immaterial for Mississippi Power.
The Company recognizes tax positions that are "more likely than not" of being sustained upon examination by the appropriate taxing authorities. See Note 5 under "Unrecognized Tax Benefits" for additional information.
Property, Plant, and Equipment5. PROPERTY, PLANT, AND EQUIPMENT
Property, plant, and equipment is stated at original cost or fair value at the effective date of the Mergeracquisition, as appropriate, less any regulatory disallowances and impairments. Original cost includes:may include: materials; labor; minor items of property; appropriate administrative and general costs; payroll-related costs such as taxes, pensions, and other benefits; and the interest capitalized andand/or cost of equity funds used during construction.
The Company'sRegistrants' property, plant, and equipment in service consisted of the following at December 31:31, 2019 and 2018:
At December 31, 2019:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
Successor  Predecessor(in millions)
2016  2015
(in millions)  (in millions)
Utility plant in service$11,996
  $9,912
Information technology equipment and software324
  415
Electric utilities:

 
Generation$50,329
$15,329
$18,341
$2,786
$13,241
$
Transmission12,157
4,719
6,590
808


Distribution19,846
7,798
11,024
1,024


General/other4,650
2,177
2,182
239
29

Electric utilities' plant in service86,982
30,023
38,137
4,857
13,270

Southern Company Gas:

 
Natural gas distribution utilities transportation and distribution13,518




13,518
Storage facilities1,463
  1,255
1,634




1,634
Other725
  570
1,192




1,192
Total other plant in service2,512
  2,240
Southern Company Gas plant in service16,344




16,344
Other plant in service1,788





Total plant in service$14,508
  $12,152
$105,114
$30,023
$38,137
$4,857
$13,270
$16,344

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2018:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Electric utilities:      
Generation$52,324
$16,533
$19,145
$2,849
$13,246
$
Transmission11,344
4,380
6,156
769


Distribution18,746
7,389
10,389
968


General/other4,446
2,100
1,985
314
25

Electric utilities' plant in service86,860
30,402
37,675
4,900
13,271

Southern Company Gas:    

 
Natural gas distribution utilities transportation and distribution12,409




12,409
Storage facilities1,640




1,640
Other1,128




1,128
Southern Company Gas plant in service15,177




15,177
Other plant in service1,669





Total plant in service$103,706
$30,402
$37,675
$4,900
$13,271
$15,177

The cost of replacements of property, exclusive of minor items of property, is capitalized. The cost of maintenance, repairs, and replacement of minor items of property is charged to other operations and maintenance expenses as incurred or performed. performed with the exception of nuclear refueling costs and certain maintenance costs including those described below.
In accordance with orders from their respective state PSCs, Alabama Power and Georgia Power defer nuclear outage operations and maintenance expenses to a regulatory asset when the charges are incurred. Alabama Power amortizes the costs over a subsequent 18-month period with Plant Farley's fall outage cost amortization beginning in January of the following year and spring outage cost amortization beginning in July of the same year. Georgia Power amortizes its costs over each unit's operating cycle, or 18 months for Plant Vogtle Units 1 and 2 and 24 months for Plant Hatch Units 1 and 2.
A portion of Mississippi Power's railway track maintenance costs is charged to fuel stock and recovered through Mississippi Power's fuel clause.
The portion of padSouthern Company Gas' non-working gas atused to maintain the Company'sstructural integrity of natural gas storage facilities that is considered to be non-recoverable is recorded as depreciable property, plant, and equipment,depreciated, while the recoverable or retained portion is recordednot depreciated.
Finance Leases
Assets acquired under a finance lease (previously referred to as non-depreciablea capital lease) are included in property, plant, and equipment.equipment and are further detailed in the table below for the applicable Registrants at December 31, 2018:
At December 31, 2018:Southern Company
Georgia
Power
 (in millions)
Office buildings$216
$61
PPAs(*)

144
Computer-related equipment43

Gas pipeline7

Less: Accumulated amortization(75)(84)
Balance, net of amortization$191
$121
(*)
Represents Georgia Power's affiliate PPAs with Southern Power. See Note 1 under "Affiliate Transactions" for additional information.
See Note 9 for additional information, including finance lease right-of-use (ROU) assets, net included in property, plant, and equipment at December 31, 2019.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


The amount of non-cash property additions recognized for the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014 was $63 million, $41 million, $48 million, and $31 million, respectively. These amounts are comprised of construction-related accounts payable outstanding at the end of each period.
Depreciation and Amortization
DepreciationThe traditional electric operating companies' and Southern Company Gas' depreciation of the original cost of utility plant in service is provided primarily by using composite straight-line rates. The approximate rates which approximated 2.8% in 2016for 2019, 2018, and 2.7% in each of 2015 and 2014. 2017 are as follows:
 201920182017
Alabama Power3.1%3.0%2.9%
Georgia Power2.6%2.6%2.7%
Mississippi Power3.7%4.2%3.4%
Southern Company Gas2.9%2.9%2.9%

Depreciation studies are conducted periodically to update the composite rates thatrates. These studies are approved byfiled with the respective state PSC and/or other applicable state and federal regulatory agency. agencies for the traditional electric operating companies and natural gas distribution utilities. Effective January 1, 2020, Georgia Power's and Atlanta Gas Light's depreciation rates were revised by the Georgia PSC in connection with their respective base rate cases. On November 26, 2019, an updated depreciation study was filed with the Mississippi PSC in conjunction with the Mississippi Power 2019 Base Rate Case requesting a $16 million increase in total annual depreciation. See Note 2 for additional information.
When property, plant, and equipment subject to composite depreciation is retired or otherwise disposed of in the normal course of business, its original cost, together with the cost of removal, less salvage, is charged to accumulated depreciation. For other property dispositions, the applicable cost and accumulated depreciation are removed from the balance sheet accounts, and a gain or loss is recognized. Minor items of property included in the original cost of the asset are retired when the related property unit is retired.
At December 31, 2019 and 2018, accumulated depreciation for utility plant in service totaled $30.0 billion and $30.3 billion, respectively, for Southern Company and $4.5 billion and $4.3 billion, respectively, for Southern Company Gas.
Depreciation of the original cost of other plant in service is provided primarily on a straight-line basis over the followingestimated useful lives:lives, which for Southern Company range up to 65 years and for Southern Company Gas range from five to 15 years for transportation equipment, 40 to 60 years for storage facilities, and up to 65 years for other assets. At December 31, 2019 and 2018, accumulated depreciation for other plant in service totaled $732 million and $766 million, respectively, for Southern Company and $155 million and $129 million, respectively, for Southern Company Gas.
Allowance for Funds Used During ConstructionSouthern Power
The Company records AFUDC for Atlanta Gas Light, Nicor Gas, Chattanooga Gas, and Elizabethtown Gas, which representsSouthern Power applies component depreciation, where depreciation is computed principally by the straight-line method over the estimated debt and equity costs of capital funds that are necessary to finance the construction of new regulated facilities. While cash is not realized currently, AFUDC increases the revenue requirement and is recovered over the serviceuseful life of the asset throughasset. Certain of Southern Power's generation assets related to natural gas-fired facilities are depreciated on a higher rate baseunits-of-production basis, using hours or starts, to better match outage and higher depreciation. All current constructionmaintenance costs to the usage of, and revenues from, these assets. The primary assets in Southern Power's property, plant, and equipment are included in rates. The capital expenditures of the other three natural gas utilities do not qualify for AFUDC treatment.
The Company's AFUDC composite rates aregenerating facilities, which generally have estimated useful lives as follows:
Southern Power Generating FacilityUseful life
Natural gasUp to 45 years
Biomass(*)
Up to 40 years
SolarUp to 35 years
WindUp to 30 years
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years ended December 31,
 2016  2016 2015 2014
Atlanta Gas Light 
4.05%  4.05% 8.10% 8.10%
Chattanooga Gas(*)
3.71
  3.71
 7.41
 7.41
Elizabethtown Gas(*)
0.84
  0.84
 1.69
 0.44
Nicor Gas(*)
1.50
  1.50
 0.82
 0.24

(*)Variable rate is determined by the FERC method
See Note 15 under "Southern PowerSales of AFUDC accounting.Natural Gas and Biomass Plants" for information on Southern Power's sale of its biomass facility on June 13, 2019.
Cash payments for interest duringSouthern Power reviews its estimated useful lives and salvage values on an ongoing basis. The results of these reviews could result in changes which could have a material impact on Southern Power's net income in the successor periodnear term.
When Southern Power's depreciable property, plant, and equipment is retired, or otherwise disposed of July 1, 2016 throughin the normal course of business, the applicable cost and accumulated depreciation is removed and a gain or loss is recognized in the statements of income.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Joint Ownership Agreements
At December 31, 20162019, the Registrants' percentage ownership and investment (exclusive of nuclear fuel) in jointly-owned facilities in commercial operation were as follows:
Facility (Type)
Percent
Ownership
 Plant in Service 
Accumulated
Depreciation
 CWIP
   (in millions)
Alabama Power       
Greene County (natural gas) Units 1 and 260.0%
(a) 
$182
 $71
 $1
Plant Miller (coal) Units 1 and 291.8
(b) 
2,058
 630
 65
        
Georgia Power       
Plant Hatch (nuclear)50.1%
(c) 
$1,316
 $603
 $40
Plant Vogtle (nuclear) Units 1 and 245.7
(c) 
3,565
 2,177
 96
Plant Scherer (coal) Units 1 and 28.4
(c) 
266
 94
 14
Plant Scherer (coal) Unit 375.0
(c) 
1,267
 492
 47
Plant Wansley (coal)53.5
(c) 
1,059
 367
 10
Rocky Mountain (pumped storage)25.4
(d) 
182
 139
 
        
Mississippi Power       
Greene County (natural gas) Units 1 and 240.0%
(a) 
$118
 $46
 $1
Plant Daniel (coal) Units 1 and 250.0
(e) 
750
 214
 11
        
Southern Company Gas       
Dalton Pipeline (natural gas pipeline)50.0%
(f) 
$271
 $10
 $
(a)Jointly owned by Alabama Power and Mississippi Power and operated and maintained by Alabama Power.
(b)Jointly owned with PowerSouth and operated and maintained by Alabama Power.
(c)Georgia Power owns undivided interests in Plants Hatch, Vogtle Units 1 and 2, Scherer, and Wansley in varying amounts jointly with one or more of the following entities: OPC, MEAG Power, Dalton, Florida Power & Light Company, JEA, and Gulf Power. Georgia Power has been contracted to operate and maintain the plants as agent for the co-owners and is jointly and severally liable for third party claims related to these plants.
(d)Jointly owned with OPC, which is the operator of the plant.
(e)
Jointly owned by Gulf Power and Mississippi Power. In accordance with the operating agreement, Mississippi Power acts as Gulf Power's agent with respect to the operation and maintenance of these units. See Note 3 under "Other MattersMississippi Power" for information regarding a commitment between Mississippi Power and Gulf Power to seek a restructuring of their 50% undivided ownership interests in Plant Daniel.
(f)Jointly owned with The Williams Companies, Inc., The Dalton Pipeline is a 115-mile natural gas pipeline that serves as an extension of the Transco natural gas pipeline system into northwest Georgia. Southern Company Gas leases its 50% undivided ownership for approximately $26 million annually for an initial term through 2042. The lessee is responsible for maintaining the pipeline during the lease term and for providing service to transportation customers under its FERC-regulated tariff.
Georgia Power also owns 45.7% of Plant Vogtle Units 3 and 4, which are currently under construction and had a CWIP balance of $5.8 billion at December 31, 2019. See Note 2 under "Georgia PowerNuclear Construction" for additional information.
The Registrants' proportionate share of their jointly-owned facility operating expenses is included in the corresponding operating expenses in the statements of income and each Registrant is responsible for providing its own financing.
Assets Subject to Lien
In October 2018, the Mississippi PSC approved executed agreements between Mississippi Power and its largest retail customer, Chevron Products Company (Chevron), for Mississippi Power to continue providing retail service to the Chevron refinery in Pascagoula, Mississippi through 2038. The agreements grant Chevron a security interest in the co-generation assets, with a lease receivable balance of $118 million at December 31, 2019, located at the refinery that is exercisable upon the occurrence of (i) certain bankruptcy events or (ii) other events of default coupled with specific reductions in steam output at the facility and a downgrade of Mississippi Power's credit rating to below investment grade by two of the three rating agencies.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato to a subsidiary of Xcel. As of December 31, 2019, under the terms of the PPA and the predecessor periodsexpansion PPA for Plant Mankato, approximately $547 million of January 1, 2016 through June 30, 2016assets, primarily related to property, plant, and equipment, were subject to lien. See Note 15 under "Southern PowerSales of Natural Gas and Biomass Plants" for additional information.
See Note 8 under "Secured Debt" for information regarding debt secured by certain assets of Georgia Power, Mississippi Power, and Southern Company Gas.
6. ASSET RETIREMENT OBLIGATIONS
AROs are computed as the present value of the estimated costs for an asset's future retirement and are recorded in the period in which the liability is incurred. The estimated costs are capitalized as part of the related long-lived asset and depreciated over the asset's useful life. In the absence of quoted market prices, AROs are estimated using present value techniques in which estimates of future cash outlays associated with the asset retirements are discounted using a credit-adjusted risk-free rate. Estimates of the timing and amounts of future cash outlays are based on projections of when and how the assets will be retired and the years ended December 31, 2015cost of future removal activities. Each traditional electric operating company and 2014 totaled $135 million, $119 million, $181 million,natural gas distribution utility has received accounting guidance from its state PSC or applicable state regulatory agency allowing the continued accrual or recovery of other retirement costs for long-lived assets that it does not have a legal obligation to retire. Accordingly, the accumulated removal costs for these obligations are reflected in the balance sheets as regulatory liabilities and $187 million, respectively.amounts to be recovered are reflected in the balance sheets as regulatory assets.
Goodwill and Other Intangible Assets and Liabilities
Goodwill is not amortized, but isThe ARO liabilities for the traditional electric operating companies primarily relate to facilities that are subject to an annual impairment test during the fourth quarterCCR Rule and the related state rules, principally ash ponds. In addition, Alabama Power and Georgia Power have retirement obligations related to the decommissioning of each year, or more frequently if impairment indicators arise. In assessing goodwill for impairment, the Company has the option of first performing a qualitative assessment to determine that it is more likely than not that fair value of its reporting unit exceeds its carrying value (commonly referred to as Step 0). If the Company chooses not to perform a qualitative assessment, or the result of Step 0 indicates a probable decreasenuclear facilities (Alabama Power's Plant Farley and Georgia Power's ownership interests in fair value of its reporting unit below its carrying value, a quantitative two-step test is performed (commonly referred to as StepPlant Hatch and Plant Vogtle Units 1 and Step 2). Step 1 comparesSee "Nuclear Decommissioning" herein for additional information. The traditional electric operating companies also have AROs related to various landfill sites, asbestos removal, and underground storage tanks, as well as, for Alabama Power, disposal of polychlorinated biphenyls in certain transformers and sulfur hexafluoride gas in certain substation breakers, for Georgia Power, gypsum cells and restoration of land at the end of long-term land leases for solar facilities, and, for Mississippi Power, mine reclamation and water wells. The ARO liability for Southern Power primarily relates to Southern Power's solar and wind facilities, which are located on long-term land leases requiring the restoration of land at the end of the lease.
The traditional electric operating companies and Southern Company Gas also have identified other retirement obligations, such as obligations related to certain electric transmission and distribution facilities, certain asbestos-containing material within long-term assets not subject to ongoing repair and maintenance activities, certain wireless communication towers, the disposal of polychlorinated biphenyls in certain transformers, leasehold improvements, equipment on customer property, and property associated with the Southern Company system's rail lines and natural gas pipelines. However, liabilities for the removal of these assets have not been recorded because the settlement timing for certain retirement obligations related to these assets is indeterminable and, therefore, the fair value of the reporting unitretirement obligations cannot be reasonably estimated. A liability for these retirement obligations will be recognized when sufficient information becomes available to support a reasonable estimation of the ARO.
Southern Company and the traditional electric operating companies will continue to recognize in their respective statements of income allowed removal costs in accordance with regulatory treatment. Any differences between costs recognized in accordance with accounting standards related to asset retirement and environmental obligations and those reflected in rates are recognized as either a regulatory asset or liability in the balance sheets as ordered by the various state PSCs.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Details of the AROs included in the balance sheets are as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi Power
Southern Power(*)
 (in millions)
Balance at December 31, 2017$4,824
$1,709
$2,638
$174
$78
Liabilities incurred29

27

2
Liabilities settled(244)(55)(116)(35)
Accretion217
106
94
5
4
Cash flow revisions4,737
1,450
3,186
16

Reclassification to held for sale(169)



Balance at December 31, 2018$9,394
$3,210
$5,829
$160
$84
Liabilities incurred37

35
1
1
Liabilities settled(328)(127)(151)(35)
Accretion402
145
243
7
4
Cash flow revisions281
312
(172)57

Balance at December 31, 2019$9,786
$3,540
$5,784
$190
$89

(*)Included in other deferred credits and liabilities on Southern Power's consolidated balance sheets.
In June 2018, Alabama Power recorded an increase of approximately $1.2 billion to its carryingAROs related to the CCR Rule. Mississippi Power also recorded an increase of approximately $11 million to its AROs related to an ash pond at Plant Greene County, which is jointly-owned with Alabama Power. The revised cost estimates were based on information from feasibility studies performed on ash ponds in use at plants operated by Alabama Power, including Plant Greene County. During the second quarter 2018, Alabama Power's management completed its analysis of these studies which indicated that additional closure costs, primarily related to increases in estimated ash volume, water management requirements, and design revisions, will be required to close these ash ponds under the planned closure-in-place methodology.
Also in June 2018, Alabama Power completed an updated decommissioning cost site study for Plant Farley. The estimated cost of decommissioning based on the study resulted in an increase in Alabama Power's ARO liability of approximately $300 million. In December 2018, Georgia Power completed updated decommissioning cost site studies for Plant Hatch and Plant Vogtle Units 1 and 2. The estimated cost of decommissioning based on the studies resulted in an increase in Georgia Power's ARO liability of approximately $130 million. See "Nuclear Decommissioning" below for additional information.
In December 2018, Georgia Power recorded an increase of approximately $3.1 billion to its AROs related to the CCR Rule and the related state rule. During the second half of 2018, Georgia Power completed a strategic assessment related to its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. This assessment included engineering and constructability studies related to design assumptions for ash pond closures and advanced engineering methods. The results indicated that additional closure costs will be required to close these ash ponds, primarily due to changes in closure strategies, the estimated amount of ash to be excavated, and additional water management requirements necessary to support closure strategies. These factors also impact the estimated timing of future cash outlays.
The 2018 reclassification of a portion of the ARO liability to liabilities held for sale by Southern Company represents the AROs related to Gulf Power. See Note 15 under "Southern Company" and "Assets Held for Sale" for additional information.
During 2019, Alabama Power recorded increases totaling approximately $312 million to its AROs primarily related to the CCR Rule and the related state rule based on management's completion of closure designs during the second and third quarters 2019 under the planned closure-in-place methodology for all but one of its ash pond facilities. During 2019, Mississippi Power recorded an increase of approximately $57 million to its AROs related to the CCR Rule, primarily associated with the ash pond facility at Plant Greene County, which is jointly owned with Alabama Power. The additional estimated costs to close these ash ponds under the planned closure-in-place methodology primarily relate to cost inputs from contractor bids, internal drainage and dewatering system designs, and increases in the estimated ash volumes. Alabama Power anticipates increasing the ARO for its remaining ash pond facility within the next nine months upon completion of a feasibility study and the related cost estimate, and the increase could be material.
During the second half of 2019, Georgia Power completed an assessment of its plans to close the ash ponds at all of its generating plants in compliance with the CCR Rule and the related state rule. Cost estimates were revised to reflect further refined costs for

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

closure plans and updates to the timing of future cash outlays. As a result, in December 2019, Georgia Power recorded a decrease of approximately $174 million to its AROs related to the CCR Rule and the related state rule.
The cost estimates for AROs related to the CCR Rule and related state rules are based on information at December 31, 2019 using various assumptions related to closure and post-closure costs, timing of future cash outlays, inflation and discount rates, and the potential methods for complying with the CCR Rule and related state requirements for closure. The traditional electric operating companies expect to continue to update their cost estimates and ARO liabilities periodically as additional information related to these assumptions becomes available. Additionally, the closure designs and plans in the States of Alabama and Georgia are subject to approval by environmental regulatory agencies. Absent continued recovery of ARO costs through regulated rates, Southern Company's and the traditional electric operating companies' results of operations, cash flows, and financial condition could be materially impacted. The ultimate outcome of this matter cannot be determined at this time.
Nuclear Decommissioning
The NRC requires licensees of commercial nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. Alabama Power and Georgia Power have external trust funds (Funds) to comply with the NRC's regulations. Use of the Funds is restricted to nuclear decommissioning activities. The Funds are managed and invested in accordance with applicable requirements of various regulatory bodies, including the NRC, the FERC, and state PSCs, as well as the IRS. While Alabama Power and Georgia Power are allowed to prescribe an overall investment policy to the Funds' managers, neither Southern Company nor its subsidiaries or affiliates are allowed to engage in the day-to-day management of the Funds or to mandate individual investment decisions. Day-to-day management of the investments in the Funds is delegated to unrelated third-party managers with oversight by the management of Alabama Power and Georgia Power. The Funds' managers are authorized, within certain investment guidelines, to actively buy and sell securities at their own discretion in order to maximize the return on the Funds' investments. The Funds are invested in a tax-efficient manner in a diversified mix of equity and fixed income securities and are reported as trading securities.
Alabama Power and Georgia Power record the investment securities held in the Funds at fair value, including goodwill. Ifas disclosed in Note 13, as management believes that fair value best represents the carryingnature of the Funds. Gains and losses, whether realized or unrealized, are recorded in the regulatory liability for AROs in the balance sheets and are not included in net income or OCI. Fair value exceedsadjustments and realized gains and losses are determined on a specific identification basis.
The Funds at Georgia Power participate in a securities lending program through the managers of the Funds. Under this program, Georgia Power's Funds' investment securities are loaned to institutional investors for a fee. Securities loaned are fully collateralized by cash, letters of credit, and/or securities issued or guaranteed by the U.S. government or its agencies or instrumentalities. At December 31, 2019 and 2018, approximately $28 million and $27 million, respectively, of the fair market value Step 2 is performedof Georgia Power's Funds' securities were on loan and pledged to allocatecreditors under the Funds' managers' securities lending program. The fair value of the reportingcollateral received was approximately $29 million and $28 million at December 31, 2019 and 2018, respectively, and can only be sold by the borrower upon the return of the loaned securities. The collateral received is treated as a non-cash item in the statements of cash flows.
Investment securities in the Funds for December 31, 2019 and 2018 were as follows:
 Southern Company
Alabama
Power
Georgia
Power
 (in millions)
At December 31, 2019:   
Equity securities$1,159
$743
$416
Debt securities798
218
580
Other securities77
60
17
Total investment securities in the Funds$2,034
$1,021
$1,013
    
At December 31, 2018:   
Equity securities$919
$594
$325
Debt securities726
201
525
Other securities74
51
23
Total investment securities in the Funds$1,719
$846
$873

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

These amounts exclude receivables related to investment income and pending investment sales and payables related to pending investment purchases. For Southern Company and Georgia Power, these amounts include Georgia Power's investment securities pledged to creditors and collateral received and excludes payables related to Georgia Power's securities lending program.
The fair value increases (decreases) of the Funds, including unrealized gains (losses) and reinvested interest and dividends and excluding the Funds' expenses, for 2019, 2018, and 2017 are shown in the table below.
 Southern Company
Alabama
Power
Georgia
Power
 (in millions)
Fair value increases (decreases)   
2019$344
$194
$150
2018(67)(38)(29)
2017233
125
108
    
Unrealized gains (losses)   
At December 31, 2019$259
$149
$110
At December 31, 2018(183)(96)(87)
At December 31, 2017181
98
83
The investment securities held in the Funds continue to be managed with a long-term focus. Accordingly, all purchases and sales within the Funds are presented separately in the statements of cash flows as investing cash flows, consistent with the nature of the securities and purpose for which the securities were acquired.
For Alabama Power, approximately $16 million and $17 million at December 31, 2019 and 2018, respectively, previously recorded in internal reserves is being transferred into the Funds through 2040 as approved by the Alabama PSC. The NRC's minimum external funding requirements are based on a generic estimate of the cost to decommission only the radioactive portions of a nuclear unit based on the size and type of reactor. Alabama Power and Georgia Power have filed plans with the NRC designed to its assetsensure that, over time, the deposits and liabilitiesearnings of the Funds will provide the minimum funding amounts prescribed by the NRC.
At December 31, 2019 and 2018, the accumulated provisions for the external decommissioning trust funds were as follows:
 2019 2018
 (in millions)
Alabama Power   
Plant Farley$1,021
 $846
    
Georgia Power   
Plant Hatch$634
 $547
Plant Vogtle Units 1 and 2379
 326
Total$1,013
 $873

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Site study cost is the estimate to decommission a specific facility as of the site study year. The decommissioning cost estimates are based on prompt dismantlement and removal of the plant from service. The actual decommissioning costs may vary from these estimates because of changes in orderthe assumed date of decommissioning, changes in NRC requirements, or changes in the assumptions used in making these estimates. The estimated costs of decommissioning at December 31, 2019 based on the most current studies, which were each performed in 2018, were as follows:
 
Plant
Farley
 
Plant
 Hatch(*)
 
Plant Vogtle
 Units 1 and 2(*)
Decommissioning periods:     
Beginning year2037
 2034
 2047
Completion year2076
 2075
 2079
 (in millions)
Site study costs:     
Radiated structures$1,234
 $734
 $601
Spent fuel management387
 172
 162
Non-radiated structures99
 56
 79
Total site study costs$1,720
 $962
 $842
(*)Based on Georgia Power's ownership interests.
For ratemaking purposes, Alabama Power's decommissioning costs are based on the site study and Georgia Power's decommissioning costs are based on the NRC generic estimate to decommission the radioactive portion of the facilities and the site study estimate for spent fuel management as of 2018. Significant assumptions used to determine the implied fair valuethese costs for ratemaking were an estimated inflation rate of goodwill, which is compared4.5% and 2.75% for Alabama Power and Georgia Power, respectively, and an estimated trust earnings rate of 7.0% and 4.75% for Alabama Power and Georgia Power, respectively.
Amounts previously contributed to the carrying value of goodwillFunds for Plant Farley are currently projected to calculate an impairment loss, if any.
The Company performed Step 1be adequate to meet the decommissioning obligations. Alabama Power will continue to provide site-specific estimates of the impairment testdecommissioning costs and related projections of funds in the fourth quarter 2014, which resultedexternal trust to the Alabama PSC and, if necessary, would seek the Alabama PSC's approval to address any changes in a manner consistent with NRC and other applicable requirements.
Under the fair values2013 ARP, Georgia Power's annual decommissioning cost for ratemaking was a total of all reporting units with goodwill exceeding their respective carrying value. However, the Company noted that the fair value of the storage$5 million for Plant Hatch and fuels reporting unit, which had $14 million of goodwill, exceeded its carrying value by less than 5%Plant Vogtle Units 1 and would be at risk of failing Step2. Effective January 1, of the test if a further decline in fair value were to occur. While preparing the third quarter 2015 financial statements, and2020, in connection with the 20162019 ARP, this total annual budget process, the Company concluded that a decline in projected storage

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


subscription rates as well as a reduction in the near-term projection of the reporting unit's profitability required an interim goodwill impairment test to be performed as of September 30, 2015.
The Company performed Step 1 and Step 2 for the interim goodwill impairment test. Based on this assessment, a non-cash impairment charge for the entire $14 million of goodwill was recorded as of September 30, 2015.
For the 2016 and 2015 annual goodwill impairment tests, the Step 0 assessment was performed focusing on the following qualitative factors: macroeconomic conditions, industry and market conditions, cost factors, financial performance, entity specific events, and events specific to each reporting unit. This Step 0 analysis concluded that it is more likely than not that the fair value of the Company's reporting units that have goodwill exceeds their carrying amounts and a quantitative assessment was not required.
Goodwill and other intangible assets consisted of the following:
   Successor - At December 31, 2016
 Estimated Useful Life Gross Carrying Amount Accumulated Amortization Other Intangible Assets, Net
   (in millions)
Other intangible assets subject to amortization:       
Gas marketing services       
   Customer relationships11-14 years $221
 $(30) $191
   Trade names10-28 years 115
 (2) 113
Wholesale gas services       
   Storage and transportation contracts1-5 years 64
 (2) 62
Total intangible assets subject to amortization  $400
 $(34) $366
        
Goodwill:       
Gas distribution operations(*)
  $4,702
 $
 4,702
Gas marketing services  1,265
 
 1,265
Total goodwill  $5,967
 $
 $5,967
(*) Measurement period adjustments were recorded in acquisition accounting during the fourth quarter 2016 that resulted in a net $30 million increase to goodwill.
   Predecessor - At December 31, 2015
 Estimated Useful Life Gross Carrying Amount Accumulated Amortization Other Intangible Assets, Net
   (in millions)
Other intangible assets subject to amortization:       
Gas marketing services       
   Customer relationships11-14 years $132
 $(57) $75
   Trade names10-28 years 45
 (11) 34
Total intangible assets subject to amortization  $177
 $(68) $109
        
Goodwill:       
Gas distribution operations  $1,640
 $
 $1,640
Gas marketing services  173
 
 173
Total goodwill  $1,813
 $
 $1,813
Amortization associated with intangible assets during the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014 was $32 million, $8 million, $18 million, and $20 million, respectively. Amortization of $2 million for wholesale gas services is recorded as a reduction to operating revenues. The increases in goodwill and other intangible assets relate to purchase accounting adjustments associated with the Merger.$4 million. See Note 112 under "Merger with Southern Company""Georgia PowerRate Plans2019 ARP" for additional information.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


As of December 31, 2016, the estimated amortization associated with other intangible assets is as follows:
 Amortization
 (in millions)
2017$73
201858
201940
202028
202121
Included in other deferred credits and liabilities on the balance sheets is $91 million of intangible liabilities that were recorded during acquisition accounting for transportation contracts at wholesale gas services. At December 31, 2016, the accumulated amortization of these intangible liabilities was $21 million. The estimated amortization associated with the intangible liabilities that will be recorded in natural gas revenues is as follows:
 Amortization
 (in millions)
2017$29
201824
201917
Cash and Cash Equivalents
For purposes of the financial statements, temporary cash investments are considered cash equivalents. Temporary cash investments are securities with original maturities of 90 days or less.
Energy Marketing Receivables and Payables
Wholesale gas services provides services to retail gas marketers, wholesale gas marketers, utility companies, and industrial customers. These counterparties utilize netting agreements that enable wholesale gas services to net receivables and payables by counterparty upon settlement. Wholesale gas services also nets across product lines and against cash collateral, provided the master netting and cash collateral agreements include such provisions. While the amounts due from, or owed to, wholesale gas services' counterparties are settled net, they are recorded on a gross basis in the consolidated balance sheets as energy marketing receivables and energy marketing payables.
Wholesale gas services has trade and credit contracts that contain minimum credit rating requirements. These credit rating requirements typically give counterparties the right to suspend or terminate credit if the Company's credit ratings are downgraded to non-investment grade status. Under such circumstances, wholesale gas services would need to post collateral to continue transacting business with some of its counterparties. As of December 31, 2016 and 2015, the required collateral in the event of a credit rating downgrade was immaterial.
Wholesale gas services has a concentration of credit risk for services it provides to its counterparties. This credit risk is generally concentrated in 20 of its counterparties and is measured by 30-day receivable exposure plus forward exposure. Counterparty credit risk is evaluated using an S&P equivalent credit rating, which is determined by a process of converting the lower of the S&P or Moody's rating to an internal rating ranging from 9 to 1, with 9 being equivalent to AAA/Aaa by S&P and Moody's, respectively, and 1 being equivalent to D/Default by S&P and Moody's, respectively. A counterparty that does not have an external rating is assigned an internal rating based on the strength of its financial ratios. As of December 31, 2016, the top 20 counterparties represented 46%, or $205 million, of the total counterparty exposure and had a weighted average S&P equivalent rating of A-.
Credit policies were established to determine and monitor the creditworthiness of counterparties, including requirements to post collateral or other credit security, as well as the quality of pledged collateral. Collateral or credit security is most often in the form of cash or letters of credit from an investment-grade financial institution, but may also include cash or U.S. government securities held by a trustee. When wholesale gas services is engaged in more than one outstanding derivative transaction with the same counterparty and it also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty combined with a reasonable measure of the Company's credit risk. Wholesale gas services also uses other netting agreements with certain counterparties with whom it conducts significant transactions.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Receivables and Allowance for Uncollectible Accounts7. CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS
The Company's other trade receivables consist primarily of natural gas sales and transportation services billed to residential, commercial, industrial, and other customers. Customers are billed monthly and payment is due within 30 days. For the majority of receivables, an allowance for doubtful accounts is established based on historical collection experience and other factors. For the remaining receivables, if the Company is aware of a specific customer's inability to pay, an allowance for doubtful accounts is recorded to reduce the receivable balance to the amount the Company reasonably expects to collect. If circumstances change, the estimate of the recoverability of accounts receivable could change as well. Circumstances that could affect this estimate include, but are not limited to, customer credit issues, customer deposits, and general economic conditions. Customers' accounts are written off once they are deemed to be uncollectible.
Nicor Gas
Credit risk exposure at Nicor Gas is mitigated by a bad debt rider approved by the Illinois Commission. The bad debt rider provides for the recovery from (or refund to) customers of the difference between Nicor Gas' actual bad debt experience on an annual basis and the benchmark bad debt expense used to establish its base rates for the respective year.
Atlanta Gas Light
Concentration of credit risk occurs at Atlanta Gas Light for amounts billed for services and other costs to its customers, which consist of 14 Marketers in Georgia. The credit risk exposure to Marketers varies seasonally, with the lowest exposure in the non-peak summer months and the highest exposure in the peak winter months. Marketers are responsible for the retail sale of natural gas to end-use customers in Georgia. The functions of the retail sale of gas include the purchase and sale of natural gas, customer service, billings, and collections. Atlanta Gas Light obtains credit security support in an amount equal to no less than two times a Marketer's highest month's estimated bill from Atlanta Gas Light.
Materials and Supplies
Generally, materials and supplies include propane gas inventory, fleet fuel, and other materials and supplies. Materials are charged to inventory when purchased and then expensed or capitalized to plant, as appropriate, at weighted average cost when installed.
Natural Gas for Sale
The natural gas distribution utilities, with the exception of Nicor Gas, record natural gas inventories on a WACOG basis. In Georgia's competitive environment, Marketers sell natural gas to firm end-use customers at market-based prices. Part of the unbundling process, which resulted from deregulation and provides this competitive environment, is the assignment to Marketers of certain pipeline services that Atlanta Gas Light has under contract. On a monthly basis, Atlanta Gas Light assigns to Marketers the majority of the pipeline storage services that it has under contract, along with a corresponding amount of inventory. Atlanta Gas Light retains and manages a portion of its pipeline storage assets and related natural gas inventories for system balancing and to serve system demand.
Nicor Gas' inventory is carried at cost on a LIFO basis. Inventory decrements occurring during the year that are restored prior to year end are charged to cost of natural gas at the estimated annual replacement cost. Inventory decrements that are not restored prior to year end are charged to cost of natural gas at the actual LIFO cost of the inventory layers liquidated. The cost of gas, including inventory costs, is recovered from customers under a purchased gas recovery mechanism adjusted for differences between actual costs and amounts billed; therefore, LIFO liquidations have no impact on the Company's net income. At December 31, 2016, the Nicor Gas LIFO inventory balance was $148 million. Based on the average cost of gas purchased in December 2016, the estimated replacement cost of Nicor Gas' inventory at December 31, 2016 was $310 million, which exceeded the LIFO cost by $162 million. During 2016, Nicor Gas did not liquidate any LIFO-based inventory.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


The gas marketing services, wholesale gas services, and all other segments record inventory at LOCOM, with cost determined on a WACOG basis. For these segments, the Company evaluates the weighted average cost of its natural gas inventories against market prices to determine whether any declines in market prices below the WACOG are other than temporary. As indicated in the following table, for any declines considered to be other than temporary, the Company recorded LOCOM adjustments to cost of natural gas to reduce the value of its natural gas inventories to market value.
 Successor  Predecessor
 July 1, 2016 to December 31, 2016  January 1, 2016 to June 30, 2016 2015 2014
 (in millions)  (in millions)
Gas marketing services$
  $
 $3
 $4
Wholesale gas services1
  3
 19
 73
All other
  
 1
 
Total$1
  $3
 $23
 $77
Fair Value Measurements
The Company has financial and nonfinancial assets and liabilities subject to fair value measurement. The financial assets and liabilities measured and carried at fair value include cash and cash equivalents and derivative instruments. The carrying values of receivables, short and long-term investments, accounts payable, short-term debt, other current assets and liabilities, and accrued interest approximate their respective fair value. The nonfinancial assets and liabilities include pension and welfare benefits. See Notes 2 and 9 for additional fair value disclosures.
Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The Company utilizes market data or assumptions that market participants would use in valuing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated, or generally unobservable. The Company primarily applies the market approach for recurring fair value measurements to utilize the best available information. Accordingly, the Company uses valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Fair value balances are classified based on the observance of those inputs. The guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The three levels of the fair value hierarchy defined by the guidance are as follows:
Level 1
Quoted prices in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. The Company's Level 1 items consist of exchange-traded derivatives, money market funds, and certain retirement plan assets.
Level 2
Pricing inputs are other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date. Level 2 includes those financial and commodity instruments that are valued using valuation methodologies. These methodologies are primarily industry-standard methodologies that consider various assumptions, including quoted forward prices for commodities, time value, volatility factors, and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. Substantially all of these assumptions are observable in the marketplace throughout the full term of the instrument, can be derived from observable data, or are supported by observable levels at which transactions are executed in the marketplace. Market price data is obtained from multiple sources in order to value certain Level 2 transactions and this data is representative of transactions that occurred in the marketplace. Level 2 instruments include shorter tenor exchange-traded and non-exchange-traded derivatives such as over-the-counter (OTC) forwards and options and certain retirement plan assets.
Level 3
Pricing inputs include significant unobservable inputs thatRegistrants may be used with internally developed methodologies to determine management's best estimate of fair value from the perspective of market participants. Level 3 instruments include those that may be more structured or otherwise tailored to customers' needs. Level 3 assets, liabilities, and any applicable transfers are primarily

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


related to the Company's pension and welfare benefit plan assets as described in Note 2. Transfers into and out of Level 3 are determined using values at the end of the interim period in which the transfer occurred.
Financial Instruments
The Company uses derivative financial instruments to limit exposure to fluctuations in natural gas prices, weather, interest rates, and commodity prices. All derivative financial instruments are recognized as either assets or liabilities on the balance sheets (shown separately as "Risk Management Activities") and are measured at fair value. See Note 9 for additional information regarding fair value. Derivative contracts that qualify as cash flow hedges of anticipated transactions or are recoverable through the respective state regulatory agency approved fuel-hedging programs result in the deferral of related gains and losses in OCI or regulatory assets and liabilities, respectively, until the hedged transactions occur. Any ineffectiveness arising from cash flow hedges is recognized currently in net income. Cash flows from derivatives are classified on the statement of cash flows in the same category as the hedged item. See Note 10 for additional information regarding derivatives.
The Company offsets fair value amounts recognized for multiple derivative instruments executed with the same counterparty under a master netting arrangement. The Company had no outstanding collateral repayment obligations or rights to reclaim collateral arising from derivative instruments recognized at December 31, 2016.
The Company enters into weather derivative contracts as economic hedges of natural gas revenues in the event of warmer-than-normal weather in the Heating Season. Exchange-traded options are carried at fair value, with changes reflected in natural gas revenues. Non-exchange-traded options are accounted for using the intrinsic value method. Changes in the intrinsic value for non-exchange-traded contracts are also reflected in natural gas revenues in the consolidated statements of income.
Wholesale gas services purchases natural gas for storage when the current market price paid to buy and transport natural gas plus the cost to store and finance the natural gas is less than the market price that can be received in the future, resulting in positive net natural gas revenues. NYMEX futures and OTC contracts are used to sell natural gas at that future price to substantially protect the natural gas revenues that will ultimately be realized when the stored natural gas is sold. The Company enters into transactions to secure transportation capacity between delivery points in order to serve its customers and various markets. NYMEX futures and OTC contracts are used to capture the price differential or spread between the locations served by the capacity in order to substantially protect the natural gas revenues that will ultimately be realized when the physical flow of natural gas between delivery points occurs. These contracts generally meet the definition of derivatives and are carried at fair value on the consolidated balance sheets, with changes in fair value recorded in natural gas revenues on the consolidated statements of income in the period of change. These contracts are not designated as hedges for accounting purposes.
The purchase, transportation, storage, and sale of natural gas are accounted for on a weighted average cost or accrual basis, as appropriate, rather than on the fair value basis utilized for the derivatives used to mitigate the natural gas price risk associated with the storage and transportation portfolio. Monthly demand charges are incurred for the contracted storage and transportation capacity and payments associated with asset management agreements, and these demand charges and payments are recognized on the consolidated statements of income in the period they are incurred. This difference in accounting methods can result in volatility in reported earnings, even though the economic margin is substantially unchanged from the dates the transactions were consummated.
The Company is exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company has established controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company's exposure to counterparty credit risk.
Comprehensive Income
The objective of comprehensive income is to report a measure of all changes in common stock equity of an enterprise that result from transactions and other economic events of the period other than transactions with owners. Comprehensive income consists of net income, changes in the fair value of qualifying cash flow hedges, certain changes in pension and other postretirement benefit plans, and reclassifications for amounts included in net income.
Non-Wholly Owned Entities
The Company holdshold ownership interests in a number of business ventures with varying ownership structures and evaluates all of its partnershipstructures. Partnership interests and other variable interests are evaluated to determine if each entity is a VIE. If a venture is a VIE for which the Companya Registrant is the primary beneficiary, the assets, liabilities, and results of operations of the entity are consolidated. The Company reassesses itsRegistrants reassess the conclusion as to whether an entity is a VIE upon certain occurrences, which are deemed reconsideration events under the guidance. See Note 4 under "Variable Interest Entities" for additional information.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


events.
For entities that are not determined to be VIEs, the Company evaluatesRegistrants evaluate whether it hasthey have control or significant influence over the investee to determine the appropriate consolidation and presentation. Generally, entities under the control of the Companya Registrant are consolidated, and entities over which the Companya Registrant can exert significant influence, but which a Registrant does not control, are accounted for under the equity method of accounting. However, the CompanyRegistrants may also investsinvest in partnerships and limited liability companies that maintain separate ownership accounts. All such investments are required to be accounted for under the equity method unless the interest is so minor that there is virtually no influence over operating and financial policies, as are all investments in joint ventures.
Investments accounted for under the equity method are recorded within equity investments in unconsolidated subsidiaries within the other property and investments section in the consolidated balance sheets and, for Southern Company and Southern Company Gas, the equity income is recorded within earnings from equity method investments withinin the statements of income. See "SEGCO" and "Southern Company Gas" herein for additional information.
SEGCO
Alabama Power and Georgia Power own equally all of the outstanding capital stock of SEGCO, which owns electric generating units with a total rated capacity of 1,020 MWs, as well as associated transmission facilities. Alabama Power and Georgia Power

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

account for SEGCO using the equity method; Southern Company consolidates SEGCO. The capacity of these units is sold equally to Alabama Power and Georgia Power. Alabama Power and Georgia Power make payments sufficient to provide for the operating expenses, taxes, interest expense, and a ROE. The share of purchased power included in purchased power, affiliates in the statements of income totaled $93 million in 2019, $102 million in 2018, and $76 million in 2017 for Alabama Power and $95 million in 2019, $105 million in 2018, and $78 million in 2017 for Georgia Power.
SEGCO paid $14 million of dividends in 2019, $18 million in 2018, and $24 million in 2017, of which one-half of each was paid to each of Alabama Power and Georgia Power. In addition, Alabama Power and Georgia Power each recognize 50% of SEGCO's net income.
Alabama Power, which owns and operates a generating unit adjacent to the SEGCO generating units, has a joint ownership agreement with SEGCO for the ownership of an associated gas pipeline. Alabama Power owns 14% of the pipeline with the remaining 86% owned by SEGCO.
See Note 3 under "Guarantees" for additional information regarding guarantees of Alabama Power and Georgia Power related to SEGCO.
Southern Power
Variable Interest Entities
Southern Power has certain subsidiaries that are determined to be VIEs. Southern Power is considered the primary beneficiary of these VIEs because it controls the most significant activities of the VIEs, including operating and maintaining the respective assets, and has the obligation to absorb expected losses of these VIEs to the extent of its equity interests.
SP Solar and SP Wind
In May 2018, Southern Power sold a noncontrolling 33% limited partnership interest in SP Solar to Global Atlantic Financial Group Limited (Global Atlantic). See Note 15 under "Southern Power" for additional information. A wholly-owned subsidiary of Southern Power is the general partner and holds a 1% ownership interest in SP Solar and another wholly-owned subsidiary of Southern Power owns the remaining 66% ownership in SP Solar. SP Solar qualifies as a VIE since the arrangement is structured as a limited partnership and the 33% limited partner does not have substantive kick-out rights against the general partner.
At December 31, 2019 and 2018, SP Solar had total assets of $6.4 billion and $6.3 billion, respectively, total liabilities of $381 million and $113 million, respectively, and noncontrolling interests of $1.1 billion and $1.2 billion, respectively. Cash distributions from SP Solar are allocated 67% to Southern Power and 33% to Global Atlantic in accordance with their partnership interest percentage. Under the terms of the limited partnership agreement, distributions without limited partner consent are limited to available cash and SP Solar is obligated to distribute all such available cash to its partners each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves.
In December 2018, Southern Power sold a noncontrolling tax-equity interest in SP Wind to 3 financial investors. SP Wind owns 8 operating wind farms. See Note 15 under "Southern Power" for additional information. Southern Power owns 100% of the Class B membership interests and the 3 financial investors own 100% of the Class A membership interests. SP Wind qualifies as a VIE since the structure of the arrangement is similar to a limited partnership and the Class A members do not have substantive kick-out rights against Southern Power.
At December 31, 2019 and 2018, SP Wind had total assets of $2.5 billion and $2.5 billion, respectively, total liabilities of $128 million and $51 million, respectively, and noncontrolling interests of $45 million and $47 million, respectively. Under the terms of the limited liability agreement, distributions without Class A member consent are limited to available cash and SP Wind is obligated to distribute all such available cash to its members each quarter. Available cash includes all cash generated in the quarter subject to the maintenance of appropriate operating reserves. Cash distributions from SP Wind are generally allocated 60% to Southern Power and 40% to the 3 financial investors in accordance with the limited liability agreement.
Southern Power consolidates both SP Solar and SP Wind, as the primary beneficiary, since it controls the most significant activities of each entity, including operating and maintaining their assets. Certain transfers and sales of the assets in the VIEs are subject to partner consent and the liabilities are non-recourse to the general credit of Southern Power. Liabilities consist of customary working capital items and do not include any long-term debt.
Other Variable Interest Entities
Southern Power has other consolidated VIEs that relate to certain subsidiaries that have either sold noncontrolling interests to tax-equity investors or acquired less than a 100% interest from facility developers. These entities are considered VIEs because the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

arrangements are structured similar to a limited partnership and the noncontrolling members do not have substantive kick-out rights.
At December 31, 2019 and 2018, the other VIEs had total assets of $1.1 billion and $858 million, respectively, total liabilities of $104 million and $80 million, respectively, and noncontrolling interests of $409 million and $241 million, respectively. Under the terms of the partnership agreements, distributions of all available cash are required each month or quarter and additional distributions require partner consent.
In August 2019, Southern Power completed the acquisition of a majority interest in DSGP and gained control of its most significant activities. As a result, Southern Power became the primary beneficiary of this VIE and began accounting for it as a consolidated entity. Upon consolidation of DSGP, Southern Power recorded an additional $107 million in assets, $51 million in liabilities, and $56 million in noncontrolling interest. There was 0 cash transferred as a result of this consolidation. From the date of Southern Power's first investment in June 2019 until gaining control in August 2019, Southern Power applied the equity method of accounting. See Note 15 under "Southern Power" for additional information.
Equity Method Investments
At December 31, 2019, Southern Power had equity method investments in several wind and battery storage projects totaling $28 million.
Redeemable Noncontrolling Interests
In 2017, Southern Power reclassified approximately $114 million from redeemable noncontrolling interests to non-redeemable noncontrolling interests due to the expiration of an option allowing SunPower Corporation to require Southern Power to purchase its redeemable noncontrolling interest at fair market value. In addition, in 2017, Turner Renewable Energy, LLC redeemed at fair value its 10% interest of redeemable noncontrolling interest in certain of Southern Power's solar facilities. At December 31, 2019, 2018, and 2017, there were 0 outstanding redeemable noncontrolling interests.
The following table presents the changes in Southern Power's redeemable noncontrolling interests for the year ended December 31, 2017:
 2017
 (in millions)
Beginning balance$164
Net income attributable to redeemable noncontrolling interests2
Distributions to redeemable noncontrolling interests(2)
Capital contributions from redeemable noncontrolling interests2
Redemption of redeemable noncontrolling interests(59)
Reclassification to non-redeemable noncontrolling interests(114)
Change in fair value of redeemable noncontrolling interests7
Ending balance$

The following table presents the attribution of net income (expense) sectionto Southern Power and the noncontrolling interests for the year ended December 31, 2017:
 2017
 (in millions)
Net income$1,117
Less: Net income attributable to noncontrolling interests44
Less: Net income attributable to redeemable noncontrolling interests2
Net income attributable to Southern Power$1,071


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company Gas
Equity Method Investments
The carrying amounts of Southern Company Gas' equity method investments at December 31, 2019 and 2018 and related income from those investments for the years ended December 31, 2019, 2018, and 2017 were as follows:
Investment Balance2019 2018
 (in millions)
SNG(a)
$1,137
 $1,261
Atlantic Coast Pipeline(b)

 83
PennEast Pipeline82
 71
Pivotal JAX LNG(b)

 53
Other(c)
32
 70
Total$1,251
 $1,538

(a)Decrease primarily relates to the continued amortization of deferred tax assets established upon acquisition, as well as distributions in excess of earnings.
(b)
As a result of the proposed sale of Southern Company Gas' interests in Pivotal LNG and Atlantic Coast Pipeline, these amounts are classified as held for sale at December 31, 2019. See Note 3 under "Other MattersSouthern Company Gas" and Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" and "Assets Held for Sale," respectively, for additional information.
(c)
Decrease primarily relates to the sale of Triton. See Note 15 under "Southern Company Gas" for additional information.
Earnings from Equity Method Investments2019 2018 2017
 (in millions)
SNG$141
 $131
 $88
Atlantic Coast Pipeline(a)
13
 7
 6
PennEast Pipeline(a)
6
 5
 6
Other(b)
(3) 5
 6
Total$157
 $148
 $106

(a)Amounts primarily result from AFUDC equity recorded by the project entity.
(b)
Decrease primarily relates to the sale of Triton. See Note 15 under "Southern Company Gas" for additional information.
SNG
In 2016, Southern Company Gas, through a wholly-owned, indirect subsidiary, acquired a 50% equity interest in SNG, which is accounted for as an equity method investment. Selected financial information of SNG at December 31, 2019 and 2018 and for the years ended December 31, 2019, 2018, and 2017 is as follows:
Balance Sheet Information2019 2018
 (in millions)
Current assets$85
 $104
Property, plant, and equipment2,570
 2,606
Deferred charges and other assets158
 121
Total Assets$2,813
 $2,831
    
Current liabilities$227
 $103
Long-term debt1,214
 1,103
Other deferred charges and other liabilities86
 212
Total Liabilities$1,527
 $1,418
    
Total Stockholders' Equity$1,286
 $1,413
Total Liabilities and Stockholders' Equity$2,813
 $2,831

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Income Statement Information2019 2018 2017
 (in millions)
Revenues$630
 $604
 $544
Operating income335
 310
 242
Net income280
 261
 175

Atlantic Coast and PennEast Pipelines
In 2014, Southern Company Gas entered into a joint venture, whereby it holds a 5% ownership interest in the Atlantic Coast Pipeline, an interstate pipeline company formed to develop and operate an approximate 605-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with expected initial transportation capacity of 1.5 Bcf per day. On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Atlantic Coast Pipeline, LLC for the sale of its interest in Atlantic Coast Pipeline. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
Also in 2014, Southern Company Gas entered into a partnership in which it holds a 20% ownership interest in the PennEast Pipeline, an interstate pipeline company formed to develop and operate an approximate 118-mile natural gas pipeline between New Jersey and Pennsylvania. The expected initial transportation capacity of 1.0 Bcf per day is under long-term contracts, mainly with public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York.
See Note 3 under "Other MattersSouthern Company GasGas Pipeline Projects" and "Guarantees" for additional information on these pipeline projects.
Other
On May 29, 2019, Southern Company Gas sold its investment in Triton, a cargo container leasing company that was aggregated into Southern Company Gas' all other segment. See Note 15 under "Southern Company Gas" for additional information.
Southern Company Gas owns a 50% equity method investment in a LNG liquefaction and storage facility in Jacksonville, Florida, which was placed in service in October 2018. This facility is outfitted with a 2.0 million gallon storage tank with the capacity to produce in excess of 120,000 gallons of LNG per day. During 2019, net loss from this investment was $2 million. On February 7, 2020, Southern Company Gas entered into an agreement with Dominion Modular LNG Holdings, Inc. for the sale of its interest in Pivotal LNG, which includes the investment in this facility in Jacksonville, Florida. The transaction is expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. See Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
8. FINANCING
Long-term Debt
Maturities of long-term debt for the next five years are as follows:
 
Southern Company(a)(b)
Alabama Power
Georgia
Power(a)
Mississippi Power
Southern Power(b)
Southern Company
Gas
 (in millions)
2020$2,991
$251
$1,025
$281
$825
$
20213,214
311
397
270
300
330
20222,003
751
527

677
46
20232,413
301
175

290
400
2024492
22
477



(a)
Amounts include principal amortization related to the FFB borrowings beginning in February 2020; however, the final maturity date is February 20, 2044. See "DOE Loan Guarantee Borrowings" herein for additional information.
(b)Southern Power's 2022 maturity represents euro-denominated debt at the U.S. dollar denominated hedge settlement amount.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

In addition to the items described herein, long-term debt at December 31, 2019 and 2018 consists of senior notes (for all Registrants), junior subordinated notes (for Southern Company and Georgia Power), first mortgage bonds and medium-term notes (for Southern Company and Southern Company Gas), and bank term loans (for Southern Company and Alabama Power).
The traditional electric operating companies also have pollution control revenue bond obligations, which represent loans to the traditional electric operating companies from public authorities of funds derived from sales by such authorities of revenue bonds issued to finance pollution control and solid waste disposal facilities. In some cases, the pollution control revenue bond obligations represent obligations under installment sales agreements with respect to facilities constructed with the proceeds of revenue bonds issued by public authorities. The traditional electric operating companies are required to make payments sufficient for the authorities to meet principal and interest requirements of such bonds. Proceeds from certain issuances are restricted until qualifying expenditures are incurred.
Alabama Power has formed a wholly-owned trust subsidiary for the purpose of issuing preferred securities. The proceeds of the related equity investments and preferred security sales were loaned back to Alabama Power through the issuance of junior subordinated notes totaling $206 million at December 31, 2019 and 2018, which constitute substantially all of the assets of this trust and are reflected in the balance sheets as long-term debt payable. Alabama Power considers that the mechanisms and obligations relating to the preferred securities issued for its benefit, taken together, constitute a full and unconditional guarantee by it of the trust's payment obligations with respect to these securities. See Note 1 under "Variable Interest Entities" for additional information on the accounting treatment for this trust and the related securities.
At December 31, 2019 and 2018, Mississippi Power had $270 million aggregate principal amount outstanding of Mississippi Business Finance Corporation Taxable Revenue Bonds, 7.13% Series 1999A due October 20, 2021. Mississippi Power assumed the obligations in 2011 in connection with its election under its operating lease of Plant Daniel Units 3 and 4 to purchase the assets. The bonds were recorded at fair value at the date of assumption, or $346 million, reflecting a premium of $76 million. See "Secured Debt" herein for additional information. At December 31, 2019 and 2018, Mississippi Power also had $50 million of tax-exempt revenue bond obligations outstanding representing loans to Mississippi Power from a public authority of funds derived from the sale by such authority of revenue bonds issued to finance a portion of the costs of constructing the Kemper County energy facility.
See Note 9 for information related to finance lease obligations.
DOE Loan Guarantee Borrowings
Pursuant to the loan guarantee program established under Title XVII of the Energy Policy Act of 2005 (Title XVII Loan Guarantee Program), Georgia Power and the DOE entered into a loan guarantee agreement in 2014 and the Amended and Restated Loan Guarantee Agreement in March 2019. Under the Amended and Restated Loan Guarantee Agreement, the DOE agreed to guarantee the obligations of Georgia Power under note purchase agreements among the DOE, Georgia Power, and the FFB and related promissory notes which provide for 2 multi-advance term loan facilities (FFB Credit Facilities). Under the FFB Credit Facilities, Georgia Power may make term loan borrowings through the FFB in an amount up to approximately $5.130 billion, provided that total aggregate borrowings under the FFB Credit Facilities may not exceed 70% of (i) Eligible Project Costs minus (ii) approximately $1.492 billion (reflecting the amounts received by Georgia Power under the Guarantee Settlement Agreement less the related customer refunds).
In March and December 2019, Georgia Power made borrowings under the FFB Credit Facilities in an aggregate principal amount of $835 million and $383 million, respectively, with applicable interest rates of 3.213% and 2.537%, respectively, both for an interest period that extends to the final maturity date of February 20, 2044. At December 31, 2019 and 2018, Georgia Power had $3.8 billion and $2.6 billion of borrowings outstanding under the FFB Credit Facilities, respectively.
All borrowings under the FFB Credit Facilities are full recourse to Georgia Power, and Georgia Power is obligated to reimburse the DOE for any payments the DOE is required to make to the FFB under its guarantee. Georgia Power's reimbursement obligations to the DOE are full recourse and secured by a first priority lien on (i) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. There are no restrictions on Georgia Power's ability to grant liens on other property.
In addition to the conditions described above, future advances are subject to satisfaction of customary conditions, as well as certification of compliance with the requirements of the Title XVII Loan Guarantee Program, including accuracy of project-related representations and warranties, delivery of updated project-related information, and evidence of compliance with the prevailing wage requirements of the Davis-Bacon Act of 1931, as amended, and certification from the DOE's consulting engineer that proceeds of the advances are used to reimburse Eligible Project Costs.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Upon satisfaction of all conditions described above, advances may be requested on a quarterly basis through 2023. The final maturity date for each advance under the FFB Credit Facilities is February 20, 2044. Interest is payable quarterly and principal payments will begin on February 20, 2020. Borrowings under the FFB Credit Facilities will bear interest at the applicable U.S. Treasury rate plus a spread equal to 0.375%.
Under the Amended and Restated Loan Guarantee Agreement, Georgia Power is subject to customary borrower affirmative and negative covenants and events of default. In addition, Georgia Power is subject to project-related reporting requirements and other project-specific covenants and events of default.
In the event certain mandatory prepayment events occur, the FFB's commitment to make further advances under the FFB Credit Facilities will terminate and Georgia Power will be required to prepay the outstanding principal amount of all borrowings under the FFB Credit Facilities over a period of five years (with level principal amortization). Among other things, these mandatory prepayment events include (i) the termination of the Vogtle Services Agreement or rejection of the Vogtle Services Agreement in any Westinghouse bankruptcy if Georgia Power does not maintain access to intellectual property rights under the related intellectual property licenses; (ii) termination of the Bechtel Agreement, unless the Vogtle Owners enter into a replacement agreement; (iii) cancellation of Plant Vogtle Units 3 and 4 by the Georgia PSC or by Georgia Power; (iv) failure of the holders of 90% of the ownership interests in Plant Vogtle Units 3 and 4 to vote to continue construction following certain schedule extensions; (v) cost disallowances by the Georgia PSC that could have a material adverse effect on completion of Plant Vogtle Units 3 and 4 or Georgia Power's ability to repay the outstanding borrowings under the FFB Credit Facilities; or (vi) loss of or failure to receive necessary regulatory approvals. Under certain circumstances, insurance proceeds and any proceeds from an event of taking must be applied to immediately prepay outstanding borrowings under the FFB Credit Facilities. Georgia Power also may voluntarily prepay outstanding borrowings under the FFB Credit Facilities. Under the FFB Credit Facilities, any prepayment (whether mandatory or optional) will be made with a make-whole premium or discount, as applicable.
In connection with any cancellation of Plant Vogtle Units 3 and 4, the DOE may elect to continue construction of Plant Vogtle Units 3 and 4. In such an event, the DOE will have the right to assume Georgia Power's rights and obligations under the principal agreements relating to Plant Vogtle Units 3 and 4 and to acquire all or a portion of Georgia Power's ownership interest in Plant Vogtle Units 3 and 4.
Secured Debt
Each of Southern Company's subsidiaries is organized as a legal entity, separate and apart from Southern Company and its other subsidiaries. There are no agreements or other arrangements among the Southern Company system companies under which the assets of one company have been pledged or otherwise made available to satisfy obligations of Southern Company or any of its other subsidiaries.
Outstanding secured debt at December 31, 2019 and 2018 for the applicable Registrants was as follows:
 
Georgia
Power
(a)
Mississippi
 Power(b)
Southern
Company
 Gas(c)
 (in millions)
December 31, 2019$3,999
$270
$1,575
December 31, 20182,767
270
1,325
(a)
Includes Georgia Power's FFB loans that are secured by a first priority lien on (i) Georgia Power's 45.7% undivided ownership interest in Plant Vogtle Units 3 and 4 (primarily the units under construction, the related real property, and any nuclear fuel loaded in the reactor core) and (ii) Georgia Power's rights and obligations under the principal contracts relating to Plant Vogtle Units 3 and 4. See "Long-term DebtDOE Loan Guarantee Borrowings" herein for additional information. Also includes finance lease obligations of $156 million and $142 million at December 31, 2019 and 2018, respectively. See Note 9 for additional information on finance lease obligations.
(b)
Represents revenue bonds assumed in conjunction with Mississippi Power's purchase of Plant Daniel Units 3 and 4 that are secured by Plant Daniel Units 3 and 4 and certain related personal property. See "Long-term Debt" herein for additional information.
(c)Nicor Gas' first mortgage bonds are secured by substantially all of Nicor Gas' properties.
Each Registrant's senior notes, junior subordinated notes, pollution control and other revenue bond obligations, bank term loans, credit facility borrowings, and notes payable are effectively subordinated to all secured debt of each respective Registrant.
Equity Units
In August 2019, Southern Company issued 34.5 million 2019 Series A Equity Units (Equity Units), initially in the form of corporate units (Corporate Units), at a stated amount of $50 per Corporate Unit, for a total stated amount of $1.725 billion. Net

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

proceeds from the issuance were approximately $1.682 billion. The proceeds were used to repay short-term indebtedness and for other general corporate purposes, including investments in Southern Company's subsidiaries.
Each Corporate Unit is comprised of (i) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019A Remarketable Junior Subordinated Notes (Series 2019A RSNs) due 2024, (ii) a 1/40 undivided beneficial ownership interest in $1,000 principal amount of Southern Company's Series 2019B Remarketable Junior Subordinated Notes (together with the Series 2019A RSNs, the RSNs) due 2027, and (iii) a stock purchase contract, which obligates the holder to purchase from Southern Company, no later than August 1, 2022, a certain number of shares of Southern Company's common stock for $50 in cash (Stock Purchase Contract). Southern Company has agreed to remarket the RSNs in 2022, at which time each interest rate on the RSNs will reset at the applicable market rate. Holders may choose to either remarket their RSNs, receive the proceeds, and use those funds to settle the related Stock Purchase Contract or retain the RSNs and use other funds to settle the related Stock Purchase Contract. If the remarketing is unsuccessful, holders will have the right to put their RSNs to Southern Company at a price equal to the principal amount. The Corporate Units carry an annual distribution rate of 6.75% of the stated amount, which is comprised of a quarterly interest payment on the RSNs of 2.70% per year and a quarterly purchase contract adjustment payment of 4.05% per year.
Each Stock Purchase Contract obligates the holder to purchase, and Southern Company to sell, for $50 a number of shares of Southern Company common stock determined based on the applicable market value (as determined under the related Stock Purchase Contract) in accordance with the conversion ratios set forth below (subject to anti-dilution adjustments):
If the applicable market value is equal to or greater than $68.64, 0.7284 shares.
If the applicable market value is less than $68.64 but greater than $57.20, a number of shares equal to $50 divided by the applicable market value.
If the applicable market value is less than or equal to $57.20, 0.8741 shares.
A holder's ownership interest in the RSNs is pledged to Southern Company to secure the holder's obligation under the related Stock Purchase Contract. If a holder of a Stock Purchase Contract chooses at any time to have its RSNs released from the pledge, such holder's obligation under such Stock Purchase Contract must be secured by a U.S. Treasury security equal to the aggregate principal amount of the RSNs. At the time of issuance, the RSNs were recorded on Southern Company's consolidated balance sheet as long-term debt and the present value of the contract adjustment payments of $198 million was recorded as a liability, representing the obligation to make contract adjustment payments, with an offsetting reduction to paid-in capital. The liability balance at December 31, 2019 was $185 million, of which $66 million was classified as current. The difference between the face value and present value of the contract adjustment payments will be accreted to interest expense on the consolidated statements of income. See Note 4 under "Equity Method Investments"income over the three-year period ending in 2022. The liability recorded for additional information.the contract adjustment payments is considered non-cash and excluded from the consolidated statements of cash flows. To settle the Stock Purchase Contracts, Southern Company will be required to issue a maximum of 30.2 million shares of common stock (subject to anti-dilution adjustments and a make-whole adjustment if certain fundamental changes occur).
Earnings per Share
Upon consummation

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Bank Credit Arrangements
At December 31, 2019, committed credit arrangements with banks were as follows:
 Expires   
Company2020 2022 2024 Total Unused 
Due within
One Year
 (in millions)
Southern Company parent$
 $
 $2,000
 $2,000
 $1,999
 $
Alabama Power3
 525
 800
 1,328
 1,328
 3
Georgia Power
 
 1,750
 1,750
 1,733
 
Mississippi Power
 150
 
 150
 150
 
Southern Power(a)

 
 600
 600
 591
 
Southern Company Gas(b)

 
 1,750
 1,750
 1,745
 
SEGCO30
 
 
 30
 30
 30
Southern Company$33
 $675
 $6,900
 $7,608
 $7,576
 $33
(a)Southern Power's subsidiaries are not parties to its bank credit arrangement.
(b)
Southern Company Gas, as the parent entity, guarantees the obligations of Southern Company Gas Capital, which is the borrower of $1.25 billion of this arrangement. Southern Company Gas' committed credit arrangement also includes $500 million for which Nicor Gas is the borrower and which is restricted for working capital needs of Nicor Gas. Pursuant to this multi-year credit arrangement, the allocations between Southern Company Gas Capital and Nicor Gas may be adjusted. See "Structural Considerations" herein for additional information.
The bank credit arrangements require payment of commitment fees based on the unused portion of the Merger,commitments or the maintenance of compensating balances with the banks. Commitment fees average less than 1/4 of 1% for Southern Company, the traditional electric operating companies, Southern Power, Southern Company Gas, and Nicor Gas. Compensating balances are not legally restricted from withdrawal.
Subject to applicable market conditions, Southern Company and its subsidiaries expect to renew or replace their bank credit arrangements as needed, prior to expiration. In connection therewith, Southern Company and its subsidiaries may extend the maturity dates and/or increase or decrease the lending commitments thereunder.
These bank credit arrangements, as well as the term loan arrangements of Alabama Power, Georgia Power, Southern Power, and SEGCO, contain covenants that limit debt levels and contain cross-acceleration or, in the case of Southern Power, cross-default provisions to other indebtedness (including guarantee obligations) that are restricted only to the indebtedness of the individual company. Such cross-default provisions to other indebtedness would trigger an event of default if Southern Power defaulted on indebtedness or guarantee obligations over a specified threshold. Such cross-acceleration provisions to other indebtedness would trigger an event of default if the applicable borrower defaulted on indebtedness, the payment of which was then accelerated. Southern Company's, Southern Company Gas', and Nicor Gas' credit arrangements contain covenants that limit debt levels to 70% of total capitalization, as defined in the agreements, and the other subsidiaries' bank credit arrangements contain covenants that limit debt levels to 65% of total capitalization, as defined in the agreements. For purposes of these definitions, debt excludes the long-term debt payable to affiliated trusts and, in certain arrangements, other hybrid securities. Additionally, for Southern Company and Southern Power, for purposes of these definitions, debt excludes any project debt incurred by certain subsidiaries of Southern Power to the extent such debt is non-recourse to Southern Power and capitalization excludes the capital stock or other equity attributable to such subsidiaries. At December 31, 2019, the Registrants, Nicor Gas, and SEGCO were in compliance with all such covenants. None of the bank credit arrangements contain material adverse change clauses at the time of borrowings.
A portion of the unused credit with banks is allocated to provide liquidity support to the revenue bonds of the traditional electric operating companies and the commercial paper programs of the Registrants and Nicor Gas. The amount of variable rate revenue bonds of the traditional electric operating companies outstanding requiring liquidity support at December 31, 2019 was approximately $1.4 billion (comprised of approximately $854 million at Alabama Power, $550 million at Georgia Power, and $40 million at Mississippi Power). In addition, at December 31, 2019, the traditional electric operating companies had approximately $275 million (comprised of approximately $87 million at Alabama Power and $188 million at Georgia Power) of revenue bonds outstanding that are required to be remarketed within the next 12 months.
In addition to its credit arrangement described above, at December 31, 2019, Southern Power also had a $120 million continuing letter of credit facility expiring in 2021 for standby letters of credit. At December 31, 2019, $97 million had been used for letters of credit, primarily as credit support for PPA requirements, and $23 million was unused. At December 31, 2018, the total amount

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

used under this facility was $103 million. Subsequent to December 31, 2019, Southern Power entered into an additional $60 million continuing letter of credit facility expiring in 2023 for standby letters of credit. Southern Power's subsidiaries are not parties to these letter of credit facilities. Also, at December 31, 2019 and 2018, Southern Power had $104 million and $103 million, respectively, of cash collateral posted related to PPA requirements, which is included in other deferred charges and assets in Southern Power's consolidated balance sheets.
Notes Payable
The Registrants, Nicor Gas, and SEGCO make short-term borrowings primarily through commercial paper programs that have the liquidity support of the committed bank credit arrangements described above under "Bank Credit Arrangements." Southern Power's subsidiaries are not parties or obligors to its commercial paper program. Southern Company Gas maintains commercial paper programs at Southern Company Gas Capital and at Nicor Gas. Nicor Gas' commercial paper program supports working capital needs at Nicor Gas as Nicor Gas is not permitted to make money pool loans to affiliates. All of Southern Company Gas' other subsidiaries benefit from Southern Company Gas Capital's commercial paper program. See "Structural Considerations" herein for additional information.
In addition, Southern Company and certain of its subsidiaries have entered into various bank term loan agreements. Unless otherwise stated, the proceeds of these loans were used to repay existing indebtedness and for general corporate purposes, including working capital and, for the subsidiaries, their continuous construction programs.
Commercial paper and short-term bank term loans are included in notes payable in the balance sheets. Details of short-term borrowings for the applicable Registrants were as follows:
 Notes Payable at December 31, 2019 Notes Payable at December 31, 2018
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 (in millions)   (in millions)  
Southern Company       
Commercial paper$1,705
 2.1% $1,064
 3.0%
Short-term bank debt350
 2.3% 1,851
 3.1%
Total$2,055
 2.1% $2,915
 3.1%
        
Georgia Power       
Commercial paper$115
 2.1% $294
 3.1%
Short-term bank debt250
 2.2% 
 %
Total$365
 2.2% $294
 3.1%
        
Southern Power       
Commercial paper$449
 2.1% $
 %
Short-term bank debt100
 2.6% 100
 3.1%
Total$549
 2.2% $100
 3.1%
        
Southern Company Gas       
Commercial paper:       
Southern Company Gas Capital$372
 2.1% $403
 3.1%
Nicor Gas278
 1.8% 247
 3.0%
Total$650
 2.0% $650
 3.0%
See "Bank Credit Arrangements" herein for information on bank term loan covenants that limit debt levels and cross-acceleration or cross-default provisions.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Outstanding Classes of Capital Stock
Southern Company
Common Stock
Stock Issued
During 2019, Southern Company issued approximately 19.5 million shares of common stock through employee equity compensation plans and received proceeds of approximately $844 million.
See "Equity Units" herein for additional information.
Shares Reserved
At December 31, 2019, a total of 104 million shares were reserved for issuance pursuant to the Southern Investment Plan, employee savings plans, the Outside Directors Stock Plan, the Omnibus Incentive Compensation Plan (which includes stock options and performance share units as discussed in Note 12), and an at-the-market program. Of the total 104 million shares reserved, 9 million shares are heldavailable for awards under the Omnibus Incentive Compensation Plan at December 31, 2019.
Diluted Earnings Per Share
For Southern Company, the only difference in computing basic and diluted earnings per share (EPS) is attributable to awards outstanding under stock-based compensation plans and the Equity Units. Earnings per share dilution resulting from stock-based compensation plans and the Equity Units issuance is determined using the treasury stock method. Shares used to compute diluted EPS were as follows:
 Average Common Stock Shares
 2019 2018 2017
 (in millions)
As reported shares1,046
 1,020
 1,000
Effect of stock-based compensation8
 5
 8
Diluted shares1,054
 1,025
 1,008

Stock-based compensation awards that were not included in the diluted EPS calculation because they were anti-dilutive were immaterial in all years presented.
The Equity Units issued in August 2019 were excluded from the calculation of diluted EPS for 2019 as the dilutive stock price threshold was not met.
Redeemable Preferred Stock of Subsidiaries
The preferred stock of Alabama Power contains a feature that allows the holders to elect a majority of such subsidiary's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of Alabama Power, this preferred stock is presented as "Redeemable Preferred Stock of Subsidiaries" on Southern Company's balance sheets and statements of capitalization in a manner consistent with temporary equity under applicable accounting standards.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The following table presents changes during the year in redeemable preferred stock of subsidiaries for Southern Company:
 Redeemable Preferred Stock of Subsidiaries
 (in millions)
Balance at December 31, 2016:$118
Issued(a)
250
Redeemed(a)
(38)
Issuance costs(a)
(6)
Balance at December 31, 2017:324
Redeemed(b)
(33)
Balance at December 31, 2018 and 2019:$291
(a)
See "Alabama Power" herein for additional information.
(b)
See "Mississippi Power" herein for additional information.
Alabama Power
Alabama Power has preferred stock, Class A preferred stock, and common stock outstanding. Alabama Power also has authorized preference stock, none of which is outstanding. Alabama Power's preferred stock and Class A preferred stock, without preference between classes, rank senior to Alabama Power's common stock with respect to payment of dividends and voluntary and involuntary dissolution. The preferred stock and Class A preferred stock of Alabama Power contain a feature that allows the holders to elect a majority of Alabama Power's board of directors if preferred dividends are not paid for four consecutive quarters. Because such a potential redemption-triggering event is not solely within the control of Alabama Power, the preferred stock and Class A preferred stock is presented as "Redeemable Preferred Stock" on Alabama Power's balance sheets and statements of capitalization in a manner consistent with temporary equity under applicable accounting standards.
Alabama Power's preferred stock is subject to redemption at a price equal to the par value plus a premium. Alabama Power's Class A preferred stock is subject to redemption at a price equal to the stated capital. All series of Alabama Power's preferred stock currently are subject to redemption at the option of Alabama Power. The Class A preferred stock is subject to redemption on or after October 1, 2022, or following the occurrence of a rating agency event. Information for each outstanding series is in the table below:
Preferred StockPar Value/Stated Capital Per Share Shares Outstanding 
Redemption
Price Per Share
4.92% Preferred Stock$100 80,000
 $103.23
4.72% Preferred Stock$100 50,000
 $102.18
4.64% Preferred Stock$100 60,000
 $103.14
4.60% Preferred Stock$100 100,000
 $104.20
4.52% Preferred Stock$100 50,000
 $102.93
4.20% Preferred Stock$100 135,115
 $105.00
5.00% Class A Preferred Stock$25 10,000,000
 
Stated Capital(*)
(*)Prior to October 1, 2022: $25.50; on or after October 1, 2022: Stated Capital
In 2017, Alabama Power issued 10 million shares ($250 million aggregate stated capital) of 5.00% Class A Preferred Stock, Cumulative, Par Value $1 Per Share (Stated Capital $25 Per Share). The proceeds were used in 2017 to redeem all 2 million shares ($50 million aggregate stated capital) of 6.50% Series Preference Stock, 6 million shares ($150 million aggregate stated capital) of 6.45% Series Preference Stock, and 1.52 million shares ($38 million aggregate stated capital) of 5.83% Class A Preferred Stock and for other general corporate purposes, including Alabama Power's continuous construction program.
There were no changes for the years ended December 31, 2019 and 2018 in redeemable preferred stock of Alabama Power.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power
Georgia Power has preferred stock, Class A preferred stock, preference stock, and common stock authorized, but only common stock outstanding as of December 31, 2019 and 2018. In 2017, Georgia Power redeemed all of its outstanding shares of Class A preferred stock and preference stock.
Mississippi Power
Mississippi Power has preferred stock and common stock authorized, but only common stock outstanding as of December 31, 2019. In October 2018, Mississippi Power completed the redemption of all outstanding shares and depository shares of its Preferred Stock that contained a feature allowing the holders to elect a majority of Mississippi Power's board of directors if preferred dividends were not paid for four consecutive quarters. Because such a potential redemption-triggering event was not solely within the control of Mississippi Power, this preferred stock was presented as "Cumulative Redeemable Preferred Stock" on Mississippi Power's balance sheets and statements of capitalization in a manner consistent with temporary equity under applicable accounting standards.
Dividend Restrictions
The income of Southern Company is derived primarily from equity in earnings of its subsidiaries. At December 31, 2019, consolidated retained earnings included $5.3 billion of undistributed retained earnings of the subsidiaries.
The traditional electric operating companies and Southern Power can only pay dividends to Southern Company out of retained earnings or paid-in-capital.
See Note 7 under "Southern Power" for information regarding the distribution requirements for certain Southern Power subsidiaries.
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. At December 31, 2019, the amount of Southern Company Gas' subsidiary retained earnings restricted for dividend payment totaled $951 million.
Structural Considerations
Since Southern Company and Southern Company Gas are holding companies, the right of Southern Company and Southern Company Gas and, hence, the right of creditors of Southern Company or Southern Company Gas to participate in any distribution of the assets of any respective subsidiary of Southern Company or Southern Company Gas, whether upon liquidation, reorganization or otherwise, is subject to prior claims of creditors and preferred stockholders of such subsidiary.
Southern Company Gas' 100%-owned subsidiary, Southern Company Gas Capital, was established to provide for certain of Southern Company Gas' ongoing financing needs through a commercial paper program, the issuance of various debt, hybrid securities, and other financing arrangements. Southern Company Gas fully and unconditionally guarantees all debt issued by Southern Company.Company Gas Capital. Nicor Gas is not permitted by regulation to make loans to affiliates or utilize Southern Company Gas Capital for its financing needs.
Southern Power Company's senior notes, bank term loan, commercial paper, and bank credit arrangementare unsecured senior indebtedness, which rank equally with all other unsecured and unsubordinated debt of Southern Power Company. Southern Power's subsidiaries are not issuers, borrowers, or obligors, as applicable, under any of these unsecured senior debt arrangements, which are effectively subordinated to any future secured debt of Southern Power Company and any potential claims of creditors of Southern Power's subsidiaries.
9. LEASES
On January 1, 2019, the Registrants adopted the provisions of FASB ASC Topic 842 (as amended), Leases (ASC 842), which require lessees to recognize leases with a term of greater than 12 months on the balance sheet as lease obligations, representing the discounted future fixed payments due, along with ROU assets that will be amortized over the term of each lease.
The Registrants elected the transition methodology provided by ASC 842, whereby the applicable requirements were applied on a prospective basis as of the adoption date of January 1, 2019, without restating prior periods. The Registrants also elected the package of practical expedients provided by ASC 842 that allows prior determinations of whether existing contracts are, or contain, leases and the classification of existing leases to continue without reassessment. Additionally, the Registrants applied the use-of-hindsight practical expedient in determining lease terms as of the date of adoption and elected the practical expedient that allows existing land easements not previously accounted for as leases not to be reassessed.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Lessee
As lessee, the Registrants lease certain electric generating units (including renewable energy facilities), real estate/land, communication towers, railcars, and other equipment and vehicles. The major categories of lease obligations are as follows:
 As of December 31, 2019
 
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
Electric generating units$990
$125
$1,487
$
$
$
Real estate/land782
4
54
2
398
74
Communication towers154
2
3


18
Railcars51
21
26
3


Other93
8
12
1


Total$2,070
$160
$1,582
$6
$398
$92

Real estate/land leases primarily consist of commercial real estate leases at Southern Company, Georgia Power, and Southern Company Gas and various land leases primarily associated with renewable energy facilities at Southern Power. The commercial real estate leases have remaining terms of up to 25 years while the land leases have remaining terms of up to 47 years, including renewal periods.
Communication towers are leased for the installation of equipment to provide cellular phone service to customers and to support the automated meter infrastructure programs at the traditional electric operating companies and Nicor Gas. Communication tower leases have terms of up to 15 years with options to renew for periods up to 20 years.
While renewal options exist in many of the leases, other than for land leases associated with renewable energy facilities at Southern Power and for communication tower leases at Southern Company Gas, the expected term used in calculating the lease obligation generally reflects only the noncancelable period of the lease as it is not considered reasonably certain that the lease will be extended. The expected term of land leases associated with renewable energy facilities includes renewal periods reasonably certain of exercise resulting in an expected lease term at least equal to the expected life of the renewable energy facilities.
Contracts that Contain a Lease
While not specifically structured as a lease, some of the PPAs at Alabama Power and Georgia Power are deemed to represent a lease of the underlying electric generating units when the terms of the PPA convey the right to control the use of the underlying assets. Amounts recorded for leases of electric generating units are generally based on the amount of scheduled capacity payments due over the remaining term of the PPA, which varies between three and 18 years. Georgia Power has several PPAs with Southern Power that Georgia Power accounts for as leases with a lease obligation of $624 million at December 31, 2019. The amount paid for energy under these affiliate PPAs reflects a price that would be paid in an arm's-length transaction as those amounts have been reviewed and approved by the Georgia PSC.
During 2019, Alabama Power entered into additional long-term PPAs totaling approximately 640 MWs of additional generating capacity consisting of combined cycle generation expected to commence later in 2020 and solar generation coupled with battery energy storage systems expected to commence in 2022 through 2024. Both the combined cycle PPA and the 20-year term battery energy storage systems of the solar generation PPAs are deemed operating leases. The 28-year term battery energy storage systems of the solar generation PPAs are deemed finance leases. The estimated minimum lease payments for these agreements, which are contingent upon approval by the Alabama PSC, total $95 million. See Note 2 under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information.
Short-term Leases
Leases with an initial term of 12 months or less are not recorded on the balance sheet; the Registrants generally recognize lease expense for these leases on a straight-line basis over the lease term.
Residual Value Guarantees
Residual value guarantees exist primarily in railcar leases at Alabama Power and Georgia Power and the amounts probable of being paid under those guarantees are included in the lease payments. All such amounts are immaterial as of December 31, 2019.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Lease and Nonlease Components
For all asset categories, with the exception of electric generating units, gas pipelines, and real estate leases, the Registrants combine lease payments and any nonlease components, such as asset maintenance, for purposes of calculating the lease obligation and the right-of-use asset.
Balance sheet amounts recorded for operating and finance leases are as follows:
 As of December 31, 2019
 Southern Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
Operating Leases      
Operating lease ROU assets, net$1,800
$132
$1,428
$6
$369
$93
       
Operating lease obligations - current$229
$49
$144
$2
$22
$14
Operating lease obligations - non-current1,615
107
1,282
4
376
78
Total operating lease obligations$1,844
$156
$1,426
$6
$398
$92
       
Finance Leases      
Finance lease ROU assets, net$216
$4
$130
$
$
$
       
Finance lease obligations - current$21
$1
$11
$
$
$
Finance lease obligations - non-current205
3
145



Total finance lease obligations$226
$4
$156
$
$
$

Lease costs for the year ended December 31, 2019, which includes both amounts recognized as operations and maintenance expense and amounts capitalized as part of the cost of another asset, are as follows:
 Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
2019     
Lease cost      
Operating lease cost$310
$54
$206
$3
$28
$18
Finance lease cost:      
Amortization of ROU assets28
1
15



Interest on lease obligations12

18



Total finance lease cost40
1
33



Short-term lease costs48
19
22



Variable lease cost105
6
85

7

Sublease income
(1)



Total lease cost$503
$79
$346
$3
$35
$18


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Georgia Power has variable lease payments that are based on the amount of energy produced by certain renewable generating facilities subject to PPAs.
Rent expense and PPA capacity expense related to leases for 2018 and 2017, prior to the adoption of ASC 842, were as follows:
 
Southern Company(a)(b)(c)
Alabama
Power
Georgia
Power
(a)
Mississippi
Power
(b)
Southern Power(c)
Southern Company Gas
 (in millions)
2018:      
Rent expense$192
$23
$34
$4
$31
$15
PPA capacity expense231
44
206



2017:      
Rent expense$176
$25
$31
$3
$29
$15
PPA capacity expense235
41
225



(a)Georgia Power's energy-only solar PPAs accounted for as leases contained contingent rent expense of $72 million and $73 million for 2018 and 2017, respectively, of which $29 million in each of 2018 and 2017 related to solar PPAs with Southern Power.
(b)Mississippi Power's energy-only solar PPAs accounted for as operating leases contained contingent rent expense of $10 million and $5 million in 2018 and 2017, respectively.
(c)Rent expense includes contingent rent expense related to Southern Power's land leases based on wind production and escalation in the Consumer Price Index for All Urban Consumers.
Other information with respect to cash and noncash activities related to leases, as well as weighted-average lease terms and discount rates, is as follows:
 2019
 
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
Other information      
Cash paid for amounts included in the measurements of lease obligations:      
Operating cash flows from operating leases$323
$54
$210
$3
$27
$18
Operating cash flows from finance leases10

19



Financing cash flows from finance leases32
1
13



ROU assets obtained in exchange for new operating lease obligations118
7
21

2
19
ROU assets obtained in exchange for new finance lease obligations35
2
24



 As of December 31, 2019
 
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
Weighted-average remaining lease term in years:      
Operating leases14.2
3.1
10.2
7.0
32.8
9.9
Finance leases18.8
12.1
10.5
N/A
N/A
N/A
Weighted-average discount rate:      
Operating leases4.53%3.33%4.46%4.02%5.66%3.70%
Finance leases5.04%3.60%10.76%N/A
N/A
N/A


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Maturities of lease liabilities are as follows:
 As of December 31, 2019
 
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
Maturity Analysis      
Operating leases:      
2020$289
$54
$205
$2
$26
$18
2021268
52
198
1
23
17
2022260
53
197
1
23
14
2023208
4
198
1
24
11
2024163
1
161

24
10
Thereafter1,514
1
831
2
812
44
Total2,702
165
1,790
7
932
114
Less: Present value discount858
9
364
1
534
22
Operating lease obligations$1,844
$156
$1,426
$6
$398
$92
Finance leases:      
2020$31
$1
$28
$
$
$
202125
1
24



202222
1
25



202318
1
25



202415

25



Thereafter246

134



Total357
4
261



Less: Present value discount131

105



Finance lease obligations$226
$4
$156
$
$
$

Payments made under PPAs at Georgia Power for energy generated from certain renewable energy facilities accounted for as operating and finance leases are considered variable lease costs and are therefore not reflected in the above maturity analysis.
As of December 31, 2019, Southern Company, Alabama Power, Mississippi Power, and Southern Power have additional leases that have not yet commenced, as detailed in the following table:
 
Southern
Company
Alabama
Power(a)
Mississippi Power(b)
Southern
Power
Lease category
PPAs, land, pipelines,
 and aircraft
PPAsPipelinesLand
Expected commencement date2020-20242020-202420202020
Longest lease term expiration40 years28 years15 years40 years
Estimated total obligations (in millions)
$248$95$23$87
(a)
See Note 2 under "Alabama PowerPetition for Certificate of Convenience and Necessity" for additional information. Alabama Power will have variable operating lease payments and variable finance lease payments that are based on the amount of energy produced by certain renewable generating facilities subject to PPAs.
(b)
See Note 2 under "Mississippi PowerKemper County Energy FacilityLignite Mine and CO2 Pipeline Facilities" for additional information. Estimated total obligations include non-lease components.
Lessor
The Registrants are each considered lessors in various arrangements that have been determined to contain a lease due to the customer's ability to control the use of the underlying asset owned by the applicable Registrant. For the traditional electric

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

operating companies, these arrangements consist of outdoor lighting contracts accounted for as operating leases with initial terms of up to seven years, after which the contracts renew on a month-to-month basis at the customer's option. For Mississippi Power, these arrangements also include a tolling arrangement related to an electric generating unit accounted for as a sales-type lease with a term of 20 years. For Southern Power, these arrangements consist of PPAs related to electric generating units, including renewable energy facilities, accounted for as operating leases with terms of up to 27 years. For Southern Company, these arrangements also include PPAs related to fuel cells accounted for as operating leases with terms of up to 15 years. Southern Company Gas is the lessor in operating leases related to gas pipelines with remaining terms of up to 23 years.
Lease income for the year ended December 31, 2019 is as follows:
 
Southern
Company
Alabama PowerGeorgia Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
2019      
Lease income - interest income on sales-type leases$9
$
$
$9
$
$
Lease income - operating leases273
24
71

160
35
Variable lease income403



434

Total lease income$685
$24
$71
$9
$594
$35

Lease income for Southern Power is included in wholesale revenues. Lease payments received under tolling arrangements and PPAs consist of either scheduled payments or variable payments based on the amount of energy produced by the underlying electric generating units. Scheduled payments to be received under outdoor lighting contracts, tolling arrangements, and PPAs accounted for as leases are presented in the following maturity analyses.
No profit or loss was recognized by Mississippi Power upon commencement of a tolling arrangement accounted for as a sales-type lease during the first quarter 2019. The undiscounted cash flows to be received under the lease are as follows:
 At December 31, 2019
 
Southern
Company
Mississippi
Power
 (in millions)
2020$17
$17
202115
15
202215
15
202314
14
202414
14
Thereafter138
138
Total undiscounted cash flows$213
$213
Lease receivable(*)
118
118
Difference between undiscounted cash flows and discounted cash flows$95
$95
(*)Included in other current assets and other property and investments on the balance sheets.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The undiscounted cash flows to be received under operating leases and contracts accounted for as operating leases (adjusted for intercompany eliminations) are as follows:
 At December 31, 2019
 
Southern
Company
Alabama
Power
Georgia Power
Southern
Power
Southern Company Gas
 (in millions)
2020$155
$26
$26
$84
$35
2021141
23
19
86
35
2022125
16
8
87
35
2023110
7
2
88
34
2024103
3

90
33
Thereafter1,063
20

387
463
Total$1,697
$95
$55
$822
$635

Southern Power receives payments for renewable energy under PPAs accounted for as operating leases that are considered contingent rents and are therefore not reflected in the table above. Southern Power allocates revenue to the nonlease components of PPAs based on the stand-alone selling price of capacity and energy. The undiscounted cash flows to be received under outdoor lighting contracts accounted for as operating leases at Mississippi Power are immaterial.
10. INCOME TAXES
Southern Company files a consolidated federal income tax return and the Registrants file various state income tax returns, some of which are combined or unitary. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability.
Federal Tax Reform Legislation
Following the enactment of the Tax Reform Legislation, the SEC staff issued Staff Accounting Bulletin 118 – "Income Tax Accounting Implications of the Tax Cuts and Jobs Act" (SAB 118), which provided for a measurement period of up to one year from the enactment date to complete accounting under GAAP for the tax effects of the legislation. Due to the complex and comprehensive nature of the enacted tax law changes and their application under GAAP, the Registrants considered all amounts recorded in the financial statements as a result of the Tax Reform Legislation "provisional" as discussed in SAB 118 and subject to revision prior to filing the 2017 tax return in the fourth quarter 2018. As of December 31, 2018, each of the Registrants considered the measurement of impacts from the Tax Reform Legislation on deferred income tax assets and liabilities, primarily due to the impact of the reduction of the corporate income tax rate, to be complete.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Current and Deferred Income Taxes
Details of income tax provisions are as follows:
 2019
 Southern CompanyAlabama Power
Georgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Federal —      
Current$156
$61
$264
$(6)$(717)$(120)
Deferred1,237
125
180
26
647
195
 1,393
186
444
20
(70)75
State —  
   
Current275
12
6
(1)1
37
Deferred130
72
22
11
13
18
 405
84
28
10
14
55
Total$1,798
$270
$472
$30
$(56)$130
 2018
 Southern CompanyAlabama Power
Georgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Federal —      
Current$167
$91
$393
$(567)$85
$334
Deferred231
123
(249)575
(154)33
 398
214
144
8
(69)367
State —      
Current188
26
81
(10)(9)131
Deferred(137)51
(11)(100)(86)(34)
 51
77
70
(110)(95)97
Total$449
$291
$214
$(102)$(164)$464
 2017
 Southern CompanyAlabama Power
Georgia
Power
Mississippi
Power
Southern PowerSouthern Company Gas
 (in millions)
Federal —      
Current$(62)$136
$256
$194
$(566)$103
Deferred(6)336
504
(753)(312)170
 (68)472
760
(559)(878)273
State —      
Current37
23
116

(110)27
Deferred173
73
(46)27
49
67
 210
96
70
27
(61)94
Total$142
$568
$830
$(532)$(939)$367

Southern Company's and Southern Power's ITCs and PTCs generated in the current tax year and carried forward from prior tax years that cannot be utilized in the current tax year are reclassified from current to deferred taxes in federal income tax expense in the tables above. Southern Power's ITCs and PTCs reclassified in this manner include $51 million for 2019, $128 million for

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

2018, and $316 million for 2017. Southern Power received $734 million and $5 million of cash related to federal ITCs under renewable energy initiatives in 2019 and 2018, respectively. NaN cash was received in 2017. See "Deferred Tax Assets and Liabilities" and "Tax Credit Carryforwards" herein for additional information.
In accordance with regulatory requirements, deferred federal ITCs for the traditional electric operating companies are deferred and amortized over the average life of the related property, with such amortization normally applied as a credit to reduce depreciation and amortization in the statements of income. Southern Power's and the natural gas distribution utilities' deferred federal ITCs, as well as certain state ITCs for Nicor Gas, are deferred and amortized to income tax expense over the life of the respective asset. ITCs amortized in 2019, 2018, and 2017 were immaterial for the traditional electric operating companies and Southern Company Gas and were as follows for Southern Company and Southern Power:
 Southern CompanySouthern Power
 (in millions)
2019$181
$151
201887
58
201779
57

Southern Power recognized tax credits and reduced the tax basis of the asset by 50% of the ITCs received, resulting in a net deferred tax asset. Southern Power has elected to recognize the tax benefit of this basis difference as a reduction to income tax expense in the year in which the plant reaches commercial operation. The tax benefit of the related basis differences reduced income tax expense by $5 million in 2019, $1 million in 2018, and $18 million in 2017. See "Unrecognized Tax Benefits" herein for further information.
State ITCs and other state credits, which are recognized in the period in which the credits are generated, reduced Georgia Power's income tax expense by $51 million in 2019, $21 million in 2018, and $37 million in 2017 and reduced Southern Power's income tax expense by $32 million in 2017.
Southern Power's federal and state PTCs, which are recognized in the period in which the credits are generated, reduced Southern Power's income tax expense by $12 million in 2019, $141 million in 2018, and $139 million in 2017.
Legal Entity Reorganizations
In April 2018, Southern Power completed the final stage of a legal entity reorganization of various direct and indirect subsidiaries that own and operate substantially all of its solar facilities, including certain subsidiaries owned in partnership with various third parties. In September 2018, Southern Power also completed a legal entity reorganization of 8 operating wind facilities under a new holding company, SP Wind. The reorganizations resulted in net state tax benefits related to certain changes in apportionment rates totaling approximately $65 million, which were recorded in 2018.
Effective Tax Rate
Southern Company's effective tax rate is typically lower than the statutory rate due to employee stock plans' dividend deduction, non-taxable AFUDC equity at the traditional electric operating companies, flowback of excess deferred income taxes at the regulated utilities, and federal income tax benefits from ITCs and PTCs primarily at Southern Power. Each Registrant's effective tax rate for 2018 varied significantly as compared to 2017 due to the 14% lower 2018 federal tax rate resulting from the Tax Reform Legislation.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 2019
 Southern CompanyAlabama Power
Georgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
Federal statutory rate21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %
State income tax, net of federal deduction4.9
4.9
1.0
4.3
4.0
6.1
Employee stock plans' dividend deduction(0.4)




Non-deductible book depreciation0.3
0.6
0.5
0.4


Flowback of excess deferred income taxes(2.1)(5.3)
(12.6)
(6.0)
AFUDC-Equity(0.4)(0.8)(0.6)(0.1)

ITC basis difference(0.1)


(1.9)
Amortization of ITC(0.8)(0.1)(0.1)(0.1)(16.1)(0.1)
Tax impact from sale of subsidiaries5.1



(27.6)(1.4)
Noncontrolling interests



0.8

Other
(0.4)(0.3)4.9
(0.6)(1.4)
Effective income tax (benefit) rate27.5 %19.9 %21.5 %17.8 %(20.4)%18.2 %
 2018
 Southern CompanyAlabama Power
Georgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
Federal statutory rate21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %
State income tax, net of federal deduction1.8
5.0
5.5
(65.1)(90.8)9.2
Employee stock plans' dividend deduction(1.0)




Non-deductible book depreciation0.8
0.6
1.2
0.7


Flowback of excess deferred income taxes(4.0)(1.8)
(4.1)
(3.0)
AFUDC-Equity(1.0)(1.0)(1.4)


ITC basis difference(0.6)


(0.2)
Federal PTCs(4.7)


(156.6)
Amortization of ITC(2.0)(0.1)(0.2)(0.2)(55.4)(0.1)
Tax impact from sale of subsidiaries8.6




28.5
Tax Reform Legislation(1.4)
(4.9)(26.3)96.1
(0.4)
Noncontrolling interests(0.4)


(14.9)
Other(0.8)(0.1)0.1
(1.4)2.0
0.3
Effective income tax (benefit) rate16.3 %23.6 %21.3 %(75.4)%(198.8)%55.5 %

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 2017
 Southern CompanyAlabama Power
Georgia
Power
Mississippi Power(*)
Southern PowerSouthern Company Gas
Federal statutory rate35.0 %35.0 %35.0 %(35.0)%35.0 %35.0 %
State income tax, net of federal deduction12.5
4.5
2.0
0.6
(22.2)10.0
Employee stock plans' dividend deduction(4.0)




Non-deductible book depreciation3.1
0.9
0.7
0.1


Flowback of excess deferred income taxes(0.3)
(0.1)

(0.2)
AFUDC-Equity(2.6)(1.0)(0.6)


AFUDC-Equity portion of Kemper IGCC charge15.7


5.3


ITC basis difference(1.7)


(10.0)
Federal PTCs(12.1)


(72.5)
Amortization of ITC(4.2)(0.2)(0.1)
(20.6)(0.2)
Tax Reform Legislation(25.6)0.3
(0.4)11.9
(416.1)15.0
Noncontrolling interests(1.4)


(8.6)
Other(1.1)0.1
0.2

(10.7)0.6
Effective income tax (benefit) rate13.3 %39.6 %36.7 %(17.1)%(525.7)%60.2 %
(*)Represents effective income tax benefit rate for Mississippi Power due to a loss before income taxes in 2017.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Deferred Tax Assets and Liabilities
The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements of the Registrants and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 December 31, 2019
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Deferred tax liabilities —  
   
Accelerated depreciation$8,711
$2,402
$3,058
$315
$1,422
$1,288
Property basis differences1,843
912
643
143

133
Federal effect of net state deferred tax assets


24


Leveraged lease basis differences236





Employee benefit obligations704
242
351
38
12
12
Premium on reacquired debt83
13
70



Regulatory assets –      
Storm damage reserves109

109



Employee benefit obligations1,174
311
403
55

45
Remaining book value of retired assets341
174
159
8


AROs1,723
613
1,066
44


AROs814
360
405



Other523
134
81
68
11
198
Total deferred income tax liabilities16,261
5,161
6,345
695
1,445
1,676
Deferred tax assets —      
Federal effect of net state deferred tax liabilities277
162
63

24
56
Employee benefit obligations1,385
334
488
72
5
111
Other property basis differences230

65

146

ITC and PTC carryforward2,098
11
435

1,445

Other partnership basis difference169



169

Other comprehensive losses112
8
18

10

AROs2,537
973
1,471
44


Estimated loss on plants under construction283

283



Other deferred state tax attributes402

13
251
72
8
Regulatory liability associated with the Tax Reform Legislation (not subject to normalization)401
240
133
28


Other786
173
154
56
46
287
Total deferred income tax assets8,680
1,901
3,123
451
1,917
462
Valuation allowance(137)
(35)(41)(36)(5)
Net deferred income tax assets8,543
1,901
3,088
410
1,881
457
Net deferred income taxes (assets)/liabilities$7,718
$3,260
$3,257
$285
$(436)$1,219
   

   
Recognized in the balance sheets:  

   
Accumulated deferred income taxes – assets$(170)$
$
$(139)$(551)$
Accumulated deferred income taxes – liabilities$7,888
$3,260
$3,257
$424
$115
$1,219

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 December 31, 2018
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Deferred tax liabilities —      
Accelerated depreciation$8,461
$2,236
$3,005
$335
$1,483
$1,176
Property basis differences1,807
865
633
162

134
Federal effect of net state deferred tax assets


36


Leveraged lease basis differences253





Employee benefit obligations477
149
290
25
6
6
Premium on reacquired debt88
14
74



Regulatory assets –      
Storm damage reserves111

111



Employee benefit obligations975
260
344
45

45
Remaining book value of retired assets56
6
39
11


AROs1,232
276
925
31


AROs1,210
607
575



Other537
171
102
57
34
132
Total deferred income tax liabilities15,207
4,584
6,098
702
1,523
1,493
Deferred tax assets —      
Federal effect of net state deferred tax liabilities260
155
71

22
46
Employee benefit obligations1,273
286
444
62
7
150
Other property basis differences251

61

172

ITC and PTC carryforward2,730
11
430

2,128

Alternative minimum tax carryforward62


32
21

Other partnership basis difference162



162

Other comprehensive losses82
10
3



AROs2,442
883
1,500
31


Estimated loss on plants under construction346

283
63


Other deferred state tax attributes415

19
251
72

Regulatory liability associated with the Tax Reform Legislation (not subject to normalization)294
130
127
29

8
Other731
147
140
47
47
285
Total deferred income tax assets9,048
1,622
3,078
515
2,631
489
Valuation allowance(123)
(42)(41)(27)(12)
Net deferred income tax assets8,925
1,622
3,036
474
2,604
477
Net deferred income taxes (assets)/liabilities$6,282
$2,962
$3,062
$228
$(1,081)$1,016
       
Recognized in the balance sheets:      
Accumulated deferred income
taxes – assets
$(276)$
$
$(150)$(1,186)$
Accumulated deferred income
taxes – liabilities
$6,558
$2,962
$3,062
$378
$105
$1,016

The traditional electric operating companies and natural gas distribution utilities have tax-related regulatory assets (deferred income tax charges) and regulatory liabilities (deferred income tax credits). The regulatory assets are primarily attributable to tax benefits flowed through to customers in prior years, deferred taxes previously recognized at rates lower than the current enacted tax law, and taxes applicable to capitalized interest. The regulatory liabilities are primarily attributable to deferred taxes previously recognized at rates higher than the current enacted tax law and to unamortized ITCs. See Note 2 for each Registrant's related balances at December 31, 2019 and 2018.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Tax Credit Carryforwards
Federal ITC/PTC carryforwards at December 31, 2019 were as follows:
 Southern Company
Alabama
Power
Georgia
Power
Southern
Power
 (in millions)
Federal ITC/PTC carryforwards$1,751
$11
$88
$1,445
Year in which federal ITC/PTC carryforwards begin expiring2032
2033
2032
2036
Year by which federal ITC/PTC carryforwards are expected to be utilized2024
2022
2022
2024

The estimated tax credit utilization reflects the various sale transactions described in Note 15 and could be further delayed by numerous factors, including the acquisition of additional renewable projects, the purchase of rights to additional PTCs of Plant Vogtle Units 3 and 4 pursuant to certain joint ownership agreements, and changes in taxable income projections. See Note 2 under "Georgia PowerNuclear Construction" for additional information on Plant Vogtle Units 3 and 4.
At December 31, 2019, Georgia Power also had approximately $360 million in state investment and other state tax credit carryforwards for the State of Georgia that will expire between 2020 and 2029 and are not expected to be fully utilized. Georgia Power has a net state valuation allowance of $28 million associated with these carryforwards.
The ultimate outcome of these matters cannot be determined at this time.
Net Operating Loss Carryforwards
Southern Company has fully utilized the carryforward from federal NOLs generated in 2016 and 2017. At December 31, 2019, the state and local NOL carryforwards for Southern Company's subsidiaries were as follows:
Company/JurisdictionApproximate NOL CarryforwardsApproximate Net State Income Tax Benefit
Tax Year NOL
Begins Expiring
 (in millions) 
Mississippi Power   
Mississippi$5,099
$201
2031
    
Southern Power   
Oklahoma830
39
2035
Florida258
11
2033
South Carolina56
2
2034
Other states21
2
Various
Southern Power Total$1,165
$54
 
    
Other(*)
   
Georgia171
7
2020
New York220
11
2035
New York City207
15
2035
Other states368
18
Various
Southern Company Total$7,230
$306


(*)Represents other Southern Company subsidiaries. Alabama Power, Georgia Power, and Southern Company Gas did not have material state or local NOL carryforwards at December 31, 2019.
State NOLs for Mississippi, Oklahoma, and Florida are not expected to be fully utilized prior to expiration. At December 31, 2019, Mississippi Power had a net state valuation allowance of $32 million for the Mississippi NOL and Southern Power had net state valuation allowances of $16 million for the Oklahoma NOL and $11 million for the Florida NOL.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The ultimate outcome of these matters cannot be determined at this time.
Unrecognized Tax Benefits
The Registrants had no material changes in unrecognized tax benefits during 2019. Unrecognized tax benefits changes in 2018 and 2017 for Southern Company, Mississippi Power, and Southern Power are provided below. The remaining Registrants did not have any material unrecognized tax benefits for the periods presented.
 Southern CompanyMississippi PowerSouthern Power
 (in millions)
Unrecognized tax benefits at December 31, 2016$484
$465
$17
Tax positions changes –   
Increase from current periods10


Increase from prior periods10
2

Decrease from prior periods(196)(177)(17)
Reductions due to settlements(290)(290)
Unrecognized tax benefits at December 31, 201718


Tax positions changes –   
Decrease from prior periods(18)

Unrecognized tax benefits at December 31, 2018$
$
$
Mississippi Power's tax positions changes from prior periods and reductions due to settlements for 2017 related to state tax benefits, deductions for R&E expenditures, and charitable contribution carryforwards that were impacted as a result of the settlement of R&E expenditures associated with the Kemper County energy facility, as well as federal income tax benefits from deferred ITCs. See Note 2 under "Mississippi PowerKemper County Energy Facility" and "Section 174 Research and Experimental Deduction" herein for more information.
Southern Power's decrease from prior periods for 2017 primarily relates to federal income tax benefits from deferred ITCs.
The impact on the effective tax rate of Southern Company, if recognized, was as follows for 2017:
 Southern Company
 (in millions)
2017 
Tax positions impacting the effective tax rate$18
Tax positions not impacting the effective tax rate
Balance of unrecognized tax benefits$18

All of the Registrants classify interest on tax uncertainties as interest expense. Accrued interest for all tax positions other than the Section 174 R&E deductions was immaterial for all years presented. None of the Registrants accrued any penalties on uncertain tax positions.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. New audit findings or settlements associated with ongoing audits could result in significant unrecognized tax benefits. At this time, a range of reasonably possible outcomes cannot be determined.
The IRS has finalized its audits of Southern Company's consolidated federal income tax returns through 2018. Southern Company is a participant in the Compliance Assurance Process of the IRS. The audits for the Registrants' state income tax returns have either been concluded, or the statute of limitations has expired, for years prior to 2015.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Section 174 Research and Experimental Deduction
Southern Company, on behalf of Mississippi Power, reflected deductions for R&E expenditures related to the Kemper County energy facility in its federal income tax returns, as amended, since 2008. In 2017, the U.S. Congress Joint Committee on Taxation approved a settlement between Southern Company and the IRS, resolving a methodology for these deductions. As a result earnings per common share disclosures are no longer required.of this approval, Mississippi Power recognized $176 million in 2017 of previously unrecognized tax benefits and reversed $36 million of associated accrued interest.
2.11. RETIREMENT BENEFITS
Effective July 1, 2016, in connection with the Merger, SCS became the sponsor of the Company's pension and other post-retirement benefit plans.
The Southern Company system has a qualified defined benefit, trusteed pension plan – AGL Resources Inc. Retirement Plan – covering certain eligiblesubstantially all employees, which was closed in 2012 to newwith the exception of PowerSecure employees. The qualified pension plan is funded in accordance with requirements of the Employee Retirement Income Security Act of 1974, as amended (ERISA). On September 12, 2016,In December 2019, the CompanyRegistrants voluntarily contributed $125 millionthe following amounts to the qualified pension plan. Noplan:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Contributions to qualified pension plan$1,136
$362
$200
$54
$24
$145

NaN mandatory contributions to the qualified pension plan are anticipated for the year ending December 31, 2017.2020. The Southern Company system also provides certain non-qualified defined benefit and defined contribution pension plansbenefits for a selectedselect group of management and highly compensated employees. Benefits under these non-qualified pension plansemployees, which are funded on a cash basis. In addition, the Southern Company system provides certain medical care and life insurance benefits for eligible retired employees through aother postretirement benefit plan – AGL Welfare Plan.plans. The traditional electric operating companies fund other postretirement trusts to the extent required by their respective regulatory commissions. Southern Company alsoGas has a separate unfunded supplemental retirement health care plan that provides medical care and life insurance benefits to employees of discontinued businesses. For the year ending December 31, 2017, no2020, 0 contributions to any other postretirement trust contributionstrusts are expected.
In connectionJanuary 2018, the qualified defined benefit pension plan of Southern Company Gas was merged into the Southern Company system's qualified defined benefit pension plan and the pension plan was reopened to all non-union employees of Southern Company Gas. Prior to January 2018, Southern Company Gas had a separate qualified defined benefit, trusteed pension plan covering certain eligible employees, which was closed in 2012 to new employees. Also in January 2018, Southern Company Gas' non-qualified retirement plans were merged into the Southern Company system's non-qualified retirement plan (defined benefit and defined contribution).
Effective in December 2017, 538 employees transferred from SCS to Southern Power. Accordingly, Southern Power assumed various compensation and benefit plans including participation in the Southern Company system's qualified defined benefit, trusteed pension plan covering substantially all employees. With the transfer of employees, Southern Power assumed the related benefit obligations from SCS of $139 million for the qualified pension plan (along with trust assets of $138 million) and $11 million for other postretirement benefit plans, together with $36 million in prior service costs and net gains/losses in OCI. In 2018, Southern Power also began providing certain defined benefits under the Merger,non-qualified pension plan for a select group of management and highly compensated employees. No obligation related to these benefits was assumed in the Company performed updated valuationsemployee transfer; however, obligations for services rendered by employees following the transfer are being recognized by Southern Power and are funded on a cash basis. In addition, Southern Power provides certain medical care and life insurance benefits for retired employees through other postretirement benefit plans that are funded on a cash basis. Prior to the transfer of itsemployees in December 2017, substantially all expenses charged by SCS, including pension and other postretirement benefit plan assetscosts, were recorded in Southern Power's other operations and obligations to reflect actual census data at the new measurement date of July 1, 2016. This valuation resulted in increasesmaintenance expense. The disclosures included herein exclude Southern Power for periods prior to the projected benefit obligationstransfer of employees in December 2017.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

On January 1, 2019, Southern Company completed the sale of Gulf Power to NextEra Energy. See Note 15 under "Southern Company" for additional information. The portion of the Southern Company system's pension and other postretirement benefit plans of approximately $177 million and $20 million, respectively, a decreaseattributable to Gulf Power reflected in Southern Company's consolidated balance sheet as held for sale at December 31, 2018 consisted of:
 
Pension
Plans
Other Postretirement Benefit Plans
 (in millions)
Projected benefit obligation$526
$69
Plan assets492
17
Accrued liability$(34)$(52)

All amounts presented in the fair valueremainder of pensionthis note reflect the benefit plan obligations and related plan assets of $10 million,for the Southern Company system's pension and an increase in the fair value of other postretirement benefit plan assets of $1 million. The Company also recorded a related regulatory asset of $437 million relatedplans, including the amounts attributable to unrecognizedGulf Power prior service cost and actuarial gain/loss, as it is probable that this amount will be recovered through future rates for the natural gas distribution utilities. The previously unrecognized prior service cost and actuarial gain/loss related to non-utility subsidiaries were eliminated through purchase accounting adjustments.January 1, 2019.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Actuarial Assumptions
The weighted average rates assumed in the actuarial calculations used to determine both the net periodic costs for the pension and other postretirement benefit plans for the periods presentedfollowing year and the benefit obligations as of the measurement date are presented below.
Successor  Predecessor
July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,2019
Assumptions used to determine net periodic costs:2016  2016 2015 2014Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
Pension plans         
Discount rate – interest costs(a)
3.21%  4.00% 4.20% 5.00%
Discount rate – service costs(a)
4.07
  4.80
 4.20
 5.00
Discount rate – benefit obligations4.49%4.51%4.48%4.49%4.65%4.47%
Discount rate – interest costs4.12
4.14
4.10
4.12
4.35
4.11
Discount rate – service costs4.70
4.73
4.72
4.73
4.75
4.57
Expected long-term return on plan assets7.75
  7.80
 7.80
 7.80
7.75
7.75
7.75
7.75
7.75
7.75
Annual salary increase3.50
  3.70
 3.70
 3.70
4.34
4.46
4.46
4.46
4.46
3.07
Pension band increase(b)
2.00
  2.00
 2.00
 2.00
Other postretirement benefit plans 
        
Discount rate – interest costs(a)
2.84%  3.60% 4.00% 4.70%
Discount rate – service costs(a)
3.96
  4.70
 4.00
 4.70
Discount rate – benefit obligations4.37%4.40%4.36%4.35%4.50%4.32%
Discount rate – interest costs3.98
4.01
3.97
3.95
4.14
3.91
Discount rate – service costs4.63
4.67
4.64
4.64
4.65
4.56
Expected long-term return on plan assets5.93
  6.60
 7.80
 7.80
6.86
6.76
6.85
6.79

6.49
Annual salary increase3.50
  3.70
 3.70
 3.70
4.34
4.46
4.46
4.46
4.46
3.07
(a)Effective January 1, 2016, the Company uses a spot rate approach to estimate the service cost and interest cost components. Previously, the Company estimated these components using a single weighted average discount rate.
(b)Only applicable to Nicor Gas union employees. The pension bands for the former Nicor plan reflect the negotiated rates of 2.0% for each of 2016 and 2017, in accordance with a March 2014 union agreement.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Successor  Predecessor2018
Assumptions used to determine benefit obligations:December 31, 2016  December 31, 2015
Assumptions used to determine net
periodic costs:
Southern CompanyAlabama
Power
Georgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
Pension plans     
Discount rate4.39%  4.6%
Discount rate – benefit obligations3.80%3.81%3.79%3.80%3.94%3.74%
Discount rate – interest costs3.45
3.45
3.42
3.46
3.69
3.41
Discount rate – service costs3.98
4.00
3.99
3.99
4.01
3.84
Expected long-term return on plan assets7.95
7.95
7.95
7.95
7.95
7.95
Annual salary increase3.50
  3.7
4.34
4.46
4.46
4.46
4.46
3.07
Pension band increase(*)
2.00
  2.0
Other postretirement benefit plans 
    
Discount rate4.15%  4.4%
Discount rate – benefit obligations3.68%3.71%3.68%3.68%3.81%3.62%
Discount rate – interest costs3.29
3.31
3.29
3.29
3.47
3.21
Discount rate – service costs3.91
3.93
3.91
3.91
3.93
3.82
Expected long-term return on plan assets6.83
6.83
6.80
6.99

5.89
Annual salary increase3.50
  3.7
4.34
4.46
4.46
4.46
4.46
3.07
(*)Only applicable to Nicor Gas union employees. The pension bands for the former Nicor plan reflect the negotiated rates of 2.0% for each of 2016 and 2017, in accordance with a March 2014 union agreement.
 2017
Assumptions used to determine net periodic costs:Southern CompanyAlabama
Power
Georgia
Power
Mississippi PowerSouthern Company Gas
Pension plans     
Discount rate – benefit obligations4.40%4.44%4.40%4.44%4.39%
Discount rate – interest costs3.77
3.76
3.72
3.81
3.76
Discount rate – service costs4.81
4.85
4.83
4.83
4.64
Expected long-term return on plan assets7.92
7.95
7.95
7.95
7.60
Annual salary increase4.37
4.46
4.46
4.46
3.50
Other postretirement benefit plans     
Discount rate – benefit obligations4.23%4.27%4.23%4.22%4.15%
Discount rate – interest costs3.54
3.58
3.55
3.55
3.40
Discount rate – service costs4.64
4.70
4.63
4.65
4.55
Expected long-term return on plan assets6.84
6.83
6.79
6.88
6.03
Annual salary increase4.37
4.46
4.46
4.46
3.50
 2019
Assumptions used to determine benefit obligations:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
Pension plans      
Discount rate3.41%3.44%3.40%3.41%3.52%3.39%
Annual salary increase4.73
4.73
4.73
4.73
4.73
4.73
Other postretirement benefit plans      
Discount rate3.24%3.28%3.22%3.22%3.39%3.19%
Annual salary increase4.73
4.73
4.73
4.73
4.73
4.73

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 2018
Assumptions used to determine benefit obligations:Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
Pension plans      
Discount rate4.49%4.51%4.48%4.49%4.65%4.47%
Annual salary increase4.34
4.46
4.46
4.46
4.46
3.07
Other postretirement benefit plans      
Discount rate4.37%4.40%4.36%4.35%4.50%4.32%
Annual salary increase4.34
4.46
4.46
4.46
4.46
3.07

The Company estimatesRegistrants estimate the expected return on plans assets by evaluating expected bond returns, equity risk premiums, asset allocations, the effects of active plan management, the impact of periodic plan asset rebalancing, and historical performance. The Company also considers guidance from its investment advisors in making a final determination of its expected rate of return on assets. Topension plan and other postretirement benefit plan assets using a financial model to project the extent the actualexpected return on each current investment portfolio. The analysis projects an expected rate of return on assets realized overeach of the coursedifferent asset classes in order to arrive at the expected return on the entire portfolio relying on each trust's target asset allocation and reasonable capital market assumptions. The financial model is based on four key inputs: anticipated returns by asset class (based in part on historical returns), each trust's target asset allocation, an anticipated inflation rate, and the projected impact of a year is greater or less than the assumed rate, it does not affect that year's annual pension or welfare plan cost; rather, this gain or loss reduces or increases future pension or welfare plan costs.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


each trust's portfolio.
An additional assumption used in measuring the accumulated other postretirement benefit obligations (APBO) was a weighted average medical care cost trend rate. The weighted average medical care cost trend rates used in measuring the APBO as offor the Registrants at December 31, 20162019 were as follows:
 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.00% 4.50% 2027
Post-65 medical5.00
 4.50
 2027
Post-65 prescription6.50
 4.50
 2027

 Initial Cost Trend Rate Ultimate Cost Trend Rate Year That Ultimate Rate is Reached
Pre-656.60% 4.50% 2038
Post-65 medical8.40
 4.50
 2038
Post-65 prescription8.40
 4.50
 2038
An annual increase or decrease in the assumed medical care cost trend rate of 1% would affect the APBO and the service and interest cost components as follows:
 1 Percent Increase 1 Percent Decrease
 (in millions)
Successor – December 31, 2016   
Benefit obligation$14
 $12
Service and interest costs
 
Pension Plans
The total accumulated benefit obligation for the pension plans was $1.1 billion at December 31, 20162019 and $1.02018 was as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
December 31, 2019$13,391
$3,053
$4,222
$615
$151
$963
December 31, 201811,683
2,550
3,613
513
101
842

The actuarial loss of $2.3 billion recorded in the remeasurement of the Southern Company system pension plans at December 31, 2015. 2019 was primarily due to a 108 basis point decrease in the overall discount rate used to calculate the benefit obligation as a result of lower market interest rates. The actuarial gain of $1.1 billion recorded in the remeasurement of the Southern Company system pension plans at December 31, 2018 was primarily due to a 69 basis point increase in the overall discount rate used to calculate the benefit obligation as a result of higher market interest rates.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Changes in the projected benefit obligations and the fair value of plan assets forduring the successor periodplan years ended December 31, 20162019 and for the predecessor periods ended June 30, 2016 and December 31, 20152018 were as follows:
Successor  Predecessor2019
July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
(in millions)  (in millions)(in millions)
Change in benefit obligation       
Benefit obligation at beginning of period$1,244
  $1,067
 $1,098
Benefit obligation at beginning of year$12,763
$2,816
$3,905
$557
$123
$907
Dispositions(509)




Service cost15
  13
 28
292
69
74
12
7
25
Interest cost20
  21
 45
492
114
156
22
5
36
Benefits paid(31)  (26) (49)(596)(125)(194)(26)(4)(64)
Actuarial loss (gain)(115)  169
 (55)
Balance at end of period1,133
  1,244
 1,067
Actuarial (gain) loss2,346
530
669
106
54
163
Balance at end of year14,788
3,404
4,610
671
185
1,067
Change in plan assets       
Fair value of plan assets at beginning of period837
  847
 906
Fair value of plan assets at beginning of year11,611
2,575
3,663
505
123
798
Dispositions(509)




Actual return (loss) on plan assets48
  15
 (12)2,343
524
730
103
43
172
Employer contributions129
  1
 2
1,208
383
243
59
7
144
Benefits paid(31)  (26) (49)(596)(125)(194)(26)(4)(64)
Fair value of plan assets at end of period983
  837
 847
Fair value of plan assets at end of year14,057
3,357
4,442
641
169
1,050
Accrued liability$150
  $407
 $220
$(731)$(47)$(168)$(30)$(16)$(17)
At December 31, 2016, the
 2018
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Change in benefit obligation      
Benefit obligation at beginning of year$13,808
$2,998
$4,188
$602
$139
$1,184
Dispositions(107)


(3)(104)
Service cost359
78
87
17
9
34
Interest cost464
101
139
20
5
39
Benefits paid(618)(124)(191)(24)(3)(98)
Actuarial (gain) loss(1,143)(237)(318)(58)(24)(148)
Balance at end of year12,763
2,816
3,905
557
123
907
Change in plan assets      
Fair value of plan assets at beginning of year12,992
2,836
4,058
563
138
1,068
Dispositions(107)


(3)(104)
Actual return (loss) on plan assets(711)(150)(218)(37)(9)(70)
Employer contributions55
13
14
3

2
Benefits paid(618)(124)(191)(24)(3)(98)
Fair value of plan assets at end of year11,611
2,575
3,663
505
123
798
Accrued liability$(1,152)$(241)$(242)$(52)$
$(109)


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The projected benefit obligations for the qualified and non-qualified pension plans were $1.1 billion and $39 million, respectively.at December 31, 2019 are shown in the following table. All pension plan assets are related to the qualified pension plan.
Table of ContentsIndex to Financial Statements
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Projected benefit obligations:      
Qualified pension plan$14,055
$3,286
$4,480
$639
$159
$999
Non-qualified pension plan733
118
130
31
26
68

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report



Amounts recognized in the consolidated balance sheets at December 31, 20162019 and 20152018 related to the Company'sRegistrants' pension plans consist of the following:
Successor  Predecessor
Southern
Company
Alabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
2016  2015(in millions)
(in millions)  (in millions)
Other regulatory assets, deferred$267
  $88
December 31, 2019: 
Prepaid pension costs$2
$71
$
$2
$10
$
Other regulatory assets, deferred(*)
4,072
1,130
1,416
204

172
Other deferred charges and assets58
  78





82
Other current liabilities(2)  (4)(54)(8)(11)(2)(2)(2)
Employee benefit obligations(206)  (294)(679)(110)(157)(30)(24)(97)
Other regulatory liabilities, deferred(79)




AOCI185



46
(14)
 
December 31, 2018: 
Prepaid pension costs$
$
$
$
$1
$
Other regulatory assets, deferred(*)
3,566
955
1,230
167

160
Other deferred charges and assets




74
Other current liabilities(55)(12)(15)(3)
(3)
Employee benefit obligations(1,097)(229)(227)(49)(1)(179)
Other regulatory liabilities, deferred(108)




AOCI97



26
(44)
(*)Amounts for Southern Company exclude regulatory assets of $252 million and $268 million at December 31, 2019 and 2018, respectively, associated with unamortized amounts in Southern Company Gas' pension plans prior to its 2016 acquisition by Southern Company.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Presented below are the amounts included in accumulated OCI and regulatory assets at December 31, 20162019 and 20152018 related to the portion of the defined benefit pension plansplan attributable to Southern Company, the traditional electric operating companies, and Southern Company Gas that had not yet been recognized in net periodic pension cost along with the estimated amortization of such amounts for 2017.cost.
 Prior Service CostNet (Gain) Loss
 (in millions)
Successor – Balance at December 31, 2016:  
Accumulated OCI$
$(43)
Regulatory assets (liabilities)(2)269
Total$(2)$226
   
Predecessor – Balance at December 31, 2015:  
Accumulated OCI$(4)$286
Regulatory assets
88
Total$(4)$374
Estimated amortization in net periodic cost in 2017:  
Regulatory assets (liabilities)$1
$(21)
 Southern
Company
Alabama PowerGeorgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Balance at December 31, 2019     
Regulatory assets:     
Prior service cost$13
$6
$10
$2
$(15)
Net (gain) loss3,980
1,124
1,406
201
113
Regulatory amortization



74
Total regulatory assets(*)
$3,993
$1,130
$1,416
$203
$172
      
Balance at December 31, 2018     
Regulatory assets:     
Prior service cost$17
$6
$12
$2
$(17)
Net (gain) loss3,441
949
1,218
165
83
Regulatory amortization



94
Total regulatory assets(*)
$3,458
$955
$1,230
$167
$160
(*)Amounts for Southern Company exclude regulatory assets of $252 million and $268 million at December 31, 2019 and 2018, respectively, associated with unamortized amounts in Southern Company Gas' pension plans prior to its 2016 acquisition by Southern Company.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



The components of OCI and the changes in the balance of regulatory assets related to the portion of the defined benefit pension plansplan attributable to Southern Company, the traditional electric operating companies, and Southern Company Gas for the successor periodyears ended December 31, 20162019 and for the predecessor periods ended June 30, 2016 and December 31, 20152018 are presented in the following table:
Accumulated OCI Regulatory AssetsSouthern
Company
Alabama PowerGeorgia
Power
Mississippi PowerSouthern Company Gas
(in millions)(in millions)
Predecessor – Balance at December 31, 2014:$301
 $76
Regulatory assets (liabilities):(*)
 
Balance at December 31, 2017$3,155
$890
$1,105
$158
$217
Net (gain) loss
 22
498
120
196
19
20
Change in prior service costs1



(18)
Dispositions12



(34)
Reclassification adjustments:    
Amortization of prior service costs2
 
(4)(1)(2)
2
Amortization of net loss(21) (10)
Amortization of net gain (loss)(204)(54)(69)(10)(12)
Amortization of regulatory assets(*)




(15)
Total reclassification adjustments(19) (10)(208)(55)(71)(10)(25)
Total change(19) 12
303
65
125
9
(57)
Predecessor – Balance at December 31, 2015:$282
 $88
Balance at December 31, 2018$3,458
$955
$1,230
$167
$160
Net (gain) loss801
213
231
42
30
Dispositions(144)



Reclassification adjustments:    
Amortization of prior service costs1
 
(3)(1)(1)
2
Amortization of net loss(9) (4)
Amortization of net gain (loss)(119)(37)(44)(6)
Amortization of regulatory assets(*)




(20)
Total reclassification adjustments(8) (4)(122)(38)(45)(6)(18)
Total change(8) (4)535
175
186
36
12
Predecessor – Balance at June 30, 2016:$274
 $84
   
   
Successor – Balance at July 1, 2016:$
 $368
Net (gain) loss(43) (87)
Reclassification adjustments:   
Amortization of prior service costs
 1
Amortization of net loss
 (15)
Total reclassification adjustments
 (14)
Total change(43) (101)
Successor – Balance at December 31, 2016:$(43) $267
Balance at December 31, 2019$3,993
$1,130
$1,416
$203
$172
(*)Amounts for Southern Company exclude regulatory assets of $252 million and $268 million at December 31, 2019 and 2018, respectively, associated with unamortized amounts in Southern Company Gas' pension plans prior to its 2016 acquisition by Southern Company.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Presented below are the amounts included in AOCI at December 31, 2019 and 2018 related to the portion of the defined benefit pension plan attributable to Southern Company, Southern Power, and Southern Company Gas that had not yet been recognized in net periodic pension cost.
 
Southern
Company
Southern
Power
Southern Company
Gas
 (in millions)
Balance at December 31, 2019   
AOCI:   
Prior service cost$(3)$
$(6)
Net (gain) loss188
46
(8)
Total AOCI$185
$46
$(14)
    
Balance at December 31, 2018   
AOCI:   
Prior service cost$(3)$
$(6)
Net (gain) loss100
26
(38)
Total AOCI$97
$26
$(44)

The components of OCI related to the portion of the defined benefit pension plan attributable to Southern Company, Southern Power, and Southern Company Gas for the years ended December 31, 2019 and 2018 are presented in the following table:
 Southern Company
Southern
Power
Southern Company
Gas
 (in millions)
AOCI:   
Balance at December 31, 2017$107
$33
$(42)
Net (gain) loss7
(5)6
Dispositions(8)
(8)
Reclassification adjustments:   
Amortization of net gain (loss)(9)(2)
Total reclassification adjustments(9)(2)
Total change(10)(7)(2)
Balance at December 31, 2018$97
$26
$(44)
Net (gain) loss88
20
30
Balance at December 31, 2019$185
$46
$(14)


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Components of net periodic pension costscost for the periods presentedRegistrants were as follows:
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Service cost$292
$69
$74
$12
$7
$25
Interest cost492
114
156
22
5
36
Expected return on plan assets(885)(206)(292)(40)(10)(60)
Recognized net (gain) loss120
37
44
6
1
2
Net amortization2

1


14
Prior service cost




(3)
Net periodic pension cost$21
$14
$(17)$
$3
$14
       
2018      
Service cost$359
$78
$87
$17
$9
$34
Interest cost464
101
139
20
5
39
Expected return on plan assets(943)(207)(296)(41)(10)(75)
Recognized net (gain) loss213
54
69
10
1
12
Net amortization4
1
2


15
Prior service cost




(2)
Net periodic pension cost$97
$27
$1
$6
$5
$23
       
2017      
Service cost$293
$63
$74
$15


$23
Interest cost455
98
138
20


42
Expected return on plan assets(897)(196)(283)(40)

(70)
Recognized net (gain) loss162
42
57
7


18
Net amortization12
2
3
1


1
Net periodic pension cost$25
$9
$(11)$3


$14

 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
 (in millions)  (in millions)
Service cost$15
  $13
 $28
 $24
Interest cost20
  21
 45
 47
Expected return on plan assets(35)  (33) (65) (65)
Amortization of regulatory assets13
  
 
 
Amortization:        
Prior service costs
  (1) (2) (2)
Net (gain)/loss
  13
 31
 22
Net periodic pension cost$13
  $13
 $37
 $26
The service cost component of net periodic pension cost is included in operations and maintenance expenses and all other components of net periodic pension cost are included in other income (expense), net in the Registrants' statements of income.
Net periodic pension cost is the sum of service cost, interest cost, and other costs netted against the expected return on plan assets. The expected return on plan assets is determined by multiplying the expected rate of return on plan assets and the market-related value of plan assets. In determining the market-related value of plan assets, the Registrants have elected to amortize changes in the market value of return-seeking plan assets over five years and to recognize the changes in the market value of liability-hedging plan assets immediately. Given the significant concentration in return-seeking plan assets, the accounting value of plan assets that is used to calculate the expected return on plan assets differs from the current fair value of the plan assets.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



Future benefit payments reflect expected future service and are estimated based on assumptions used to measure the projected benefit obligation for the pension plans. At December 31, 2016,2019, estimated benefit payments were as follows:
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Benefit Payments:      
2020$628
$135
$204
$27
$5
$62
2021646
141
208
28
6
62
2022671
147
214
30
6
64
2023693
153
220
30
6
62
2024715
157
226
32
7
62
2025 to 20293,868
860
1,209
174
36
316

 Benefit Payments
 (in millions)
2017$71
201872
201973
202074
202174
2022 to 2026363
Other Postretirement Benefits
Changes in the APBO and the fair value of the Registrants' plan assets forduring the successor periodplan years ended December 31, 20162019 and for the predecessor periods ended June 30, 2016 and December 31, 20152018 were as follows:
Successor  Predecessor2019
July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
(in millions)  (in millions)(in millions)
Change in benefit obligation       
Benefit obligation at beginning of period$338
  $318
 $334
Benefit obligation at beginning of year$1,865
$403
$675
$81
$9
$244
Dispositions(69)




Service cost1
  1
 2
18
5
5
1
1
1
Interest cost5
  5
 13
69
16
26
3

9
Benefits paid(11)  (11) (20)(126)(27)(47)(6)(1)(17)
Actuarial loss (gain)(26)  24
 (13)
Actuarial (gain) loss223
63
80
8
2
13
Retiree drug subsidy
  
 1
5
2
3



Employee contributions1
  1
 1
Balance at end of period308
  338
 318
Balance at end of year1,985
462
742
87
11
250
Change in plan assets       
Fair value of plan assets at beginning of period100
  99
 99
Fair value of plan assets at beginning of year928
360
344
23

98
Dispositions(18)




Actual return (loss) on plan assets4
  1
 1
189
76
68
4

21
Employee contributions1
  1
 1
Employer contributions11
  10
 17
83
2
35
5
1
13
Benefits paid(11)  (11) (20)(121)(25)(44)(6)(1)(17)
Retiree drug subsidy
  
 1
Fair value of plan assets at end of year105
  100
 99
1,061
413
403
26

115
Accrued liability$203
  $238
 $219
$(924)$(49)$(339)$(61)$(11)$(135)

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 2018
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Change in benefit obligation      
Benefit obligation at beginning of year$2,339
$517
$863
$97
$11
$310
Dispositions(18)



(18)
Service cost24
6
6
1
1
2
Interest cost75
17
28
3

10
Benefits paid(129)(28)(47)(5)(1)(17)
Actuarial (gain) loss(432)(111)(178)(15)(2)(43)
Retiree drug subsidy6
2
3



Balance at end of year1,865
403
675
81
9
244
Change in plan assets      
Fair value of plan assets at beginning of year1,053
406
386
25

125
Dispositions(18)



(18)
Actual return (loss) on plan assets(57)(25)(20)(1)
(5)
Employer contributions73
5
22
4
1
13
Benefits paid(123)(26)(44)(5)(1)(17)
Fair value of plan assets at end of year928
360
344
23

98
Accrued liability$(937)$(43)$(331)$(58)$(9)$(146)

Amounts recognized in the consolidated balance sheets at December 31, 20162019 and 20152018 related to the Company'sRegistrants' other postretirement benefit plans consist of the following:
Successor  PredecessorSouthern CompanyAlabama PowerGeorgia
Power
Mississippi Power
Southern
Power
Southern Company Gas
2016  2015(in millions)
December 31, 2019: 
Other regulatory assets, deferred(a)$183
$3
$96
$10
$
$(11)
Other current liabilities(5)




Employee benefit obligations(b)
(919)(49)(339)(61)(11)(135)
Other regulatory liabilities, deferred(62)(2)



AOCI2



2
(4)
(in millions)  (in millions) 
December 31, 2018: 
Other regulatory assets, deferred(a)$52

 $30
$99
$
$60
$6
$
$(4)
Employee benefit obligations(203)  (219)
Other current liabilities(6)




Employee benefit obligations(b)
(931)(43)(331)(58)(9)146
Other regulatory liabilities, deferred(77)(8)
(2)

AOCI(4)


1
(4)
(a)Amounts for Southern Company exclude regulatory assets of $50 million and $57 million at December 31, 2019 and 2018, respectively, associated with unamortized amounts in Southern Company Gas' other postretirement benefit plans prior to its 2016 acquisition by Southern Company.
(b)Included in other deferred credits and liabilities on Southern Power's consolidated balance sheets.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



Presented below are the amounts included in accumulated OCI andnet regulatory assets (liabilities) at December 31, 20162019 and 20152018 related to the other postretirement benefit plans of Southern Company, the traditional electric operating companies, and Southern Company Gas that had not yet been recognized in net periodic other postretirement benefit cost. The estimated amortization of such amounts for 2017 is immaterial.
 Prior Service CostNet (Gain) Loss
 (in millions)
Successor – Balance at December 31, 2016:  
Accumulated OCI$
$(3)
Regulatory assets (liabilities)(12)64
Total$(12)$61
   
Predecessor – Balance at December 31, 2015:  
Accumulated OCI$
$36
Regulatory assets (liabilities)(15)45
Total$(15)$81
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern Company Gas
 (in millions)
Balance at December 31, 2019:     
Regulatory assets (liabilities):     
Prior service cost$11
$3
$4
$
$1
Net (gain) loss110
(2)92
10
(43)
Regulatory amortization



31
Total regulatory assets (liabilities)(*)
$121
$1
$96
$10
$(11)
      
Balance at December 31, 2018:     
Regulatory assets (liabilities):     
Prior service cost$14
$8
$4
$
$2
Net (gain) loss8
(16)56
4
(43)
Regulatory amortization



37
Total regulatory assets (liabilities)(*)
$22
$(8)$60
$4
$(4)
(*)Amounts for Southern Company exclude regulatory assets of $50 million and $57 million at December 31, 2019 and 2018, respectively, associated with unamortized amounts in Southern Company Gas' other postretirement benefit plans prior to its 2016 acquisition by Southern Company.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The components of OCI, along with the changes in the balance of net regulatory assets (liabilities), related to the other postretirement benefit plans for the successor periodplan years ended December 31, 20162019 and for the predecessor periods ended June 30, 2016 and December 31, 20152018 are presented in the following table:
Accumulated OCIRegulatory AssetsSouthern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern Company Gas
(in millions)(in millions)
Predecessor – Balance at December 31, 2014:$36
$39
Net regulatory assets (liabilities):(*)
 
Balance at December 31, 2017$341
$56
$202
$17
$46
Net (gain) loss2
(8)(298)(60)(132)(12)(42)
Change in prior service costs



(2)
Reclassification adjustments:  
Amortization of prior service costs
2
(7)(4)(1)

Amortization of net loss(2)(3)
Amortization of net gain (loss)(14)(1)(9)(1)
Amortization of regulatory assets(*)




(6)
Total reclassification adjustments(2)(1)(21)(5)(10)(1)(6)
Total change
(9)(319)(65)(142)(13)(50)
Predecessor – Balance at December 31, 2015:$36
$30
Balance at December 31, 2018$22
$(9)$60
$4
$(4)
Net (gain) loss90
14
37
6
(1)
Dispositions5




Change in prior service costs5




Reclassification adjustments:  
Amortization of prior service costs
1
(3)(4)


Amortization of net loss(1)(1)
Amortization of net gain (loss)2

(1)

Amortization of regulatory assets(*)




(6)
Total reclassification adjustments(1)
(1)(4)(1)
(6)
Total change(1)
99
10
36
6
(7)
Predecessor – Balance at June 30, 2016:$35
$30
 
 
Successor – Balance at July 1, 2016:$
$77
Net (gain) loss(3)(23)
Reclassification adjustments: 
Amortization of prior service costs
1
Amortization of net loss
(3)
Total reclassification adjustments
(2)
Total change(3)(25)
Successor – Balance at December 31, 2016:$(3)$52
Balance at December 31, 2019$121
$1
$96
$10
$(11)
(*)Amounts for Southern Company exclude regulatory assets of $50 million and $57 million at December 31, 2019 and 2018, respectively, associated with unamortized amounts in Southern Company Gas' other postretirement benefit plans prior to its 2016 acquisition by Southern Company.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


Presented below are the amounts included in AOCI at December 31, 2019 and 2018 related to the other postretirement benefit plans of Southern Company, Southern Power, and Southern Company Gas that had not yet been recognized in net periodic other postretirement benefit cost.
 Southern
Company
Southern
Power
Southern Company
Gas
 (in millions)
Balance at December 31, 2019   
AOCI:   
Prior service cost$1
$
$1
Net (gain) loss1
2
(5)
Total AOCI$2
$2
$(4)
    
Balance at December 31, 2018   
AOCI:   
Prior service cost$1
$
$1
Net (gain) loss(5)1
(5)
Total AOCI$(4)$1
$(4)

The components of OCI related to the other postretirement benefit plans for the plan years ended December 31, 2019 and 2018 are presented in the following table:
 Southern Company
Southern
Power
Southern Company Gas
 (in millions)
AOCI:   
Balance at December 31, 2017$4
$3
$(3)
Net (gain) loss(8)(2)(2)
Change from employee transfer

1
Total change(8)(2)(1)
Balance at December 31, 2018$(4)$1
$(4)
Net (gain) loss5
1

Reclassification adjustments:   
Amortization of net gain (loss)1


Total change6
1

Balance at December 31, 2019$2
$2
$(4)


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report


Components of the other postretirement benefit plans' net periodic cost for the periods presentedRegistrants were as follows:
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
2019      
Service cost$18
$5
$5
$1
$1
$1
Interest cost69
16
26
3

9
Expected return on plan assets(65)(26)(25)(2)
(7)
Net amortization
4
1


6
Net periodic postretirement benefit cost$22
$(1)$7
$2
$1
$9
       
2018      
Service cost$24
$6
$6
$1
$1
$2
Interest cost75
17
28
3

10
Expected return on plan assets(69)(26)(25)(2)
(7)
Net amortization21
5
10
1

6
Net periodic postretirement benefit cost$51
$2
$19
$3
$1
$11
       
2017      
Service cost$24
$6
$7
$1
 $2
Interest cost79
17
29
3
 10
Expected return on plan assets(66)(25)(25)(1) (7)
Net amortization20
5
9
1
 1
Net periodic postretirement benefit cost$57
$3
$20
$4
 $6


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
 (in millions)  (in millions)
Service cost$1
  $1
 $2
 $2
Interest cost5
  5
 13
 15
Expected return on plan assets(3)  (3) (7) (7)
Amortization of regulatory assets2
  
 
 
Amortization:        
Prior service costs
  (1) (3) (3)
Net (gain)/loss
  2
 6
 6
Net periodic postretirement benefit cost$5
  $4
 $11
 $13

FutureThe service cost component of net periodic postretirement benefit cost is included in operations and maintenance expenses and all other components of net periodic postretirement benefit cost are included in other income (expense), net in the Registrants' statements of income.
The Registrants' future benefit payments, including prescription drug benefits, reflect expected future service and are estimated based on assumptions used to measure the APBO for the other postretirement benefit plans. At December 31, 2016,The Registrants' estimated benefit payments wereare reduced by drug subsidy receipts expected as a result of the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 as follows:
 Southern CompanyAlabama PowerGeorgia
Power
Mississippi PowerSouthern PowerSouthern Company Gas
 (in millions)
Benefit payments:      
2020$130
$29
$49
$6
$
$18
2021129
29
49
6

18
2022129
29
49
6
1
18
2023130
29
49
6
1
19
2024129
29
48
6
1
18
2025 to 2029630
145
238
29
3
83
       
Subsidy receipts:      
2020$(5)$(1)$(2)$
$
$
2021(6)(2)(2)


2022(6)(2)(3)


2023(6)(2)(3)


2024(6)(2)(3)(1)

2025 to 2029(30)(9)(13)(2)

       
Total:      
2020$125
$28
$47
$6
$
$18
2021123
27
47
6

18
2022123
27
46
6
1
18
2023124
27
46
6
1
19
2024123
27
45
5
1
18
2025 to 2029600
136
225
27
3
83

 Benefit Payments
 (in millions)
2017$20
201820
201921
202022
202122
2022 to 2026111
Benefit Plan Assets
Pension plan and other postretirement benefit plan assets are managed and invested in accordance with all applicable requirements, including ERISA and the Internal Revenue Code of 1986, as amended.Code. The Company'sRegistrants' investment policies for both the pension planplans and the other postretirement benefit plans cover a diversified mix of assets including equityas described below. Derivative instruments may be used to gain efficient exposure to the various asset classes and fixed income securities, real estate, and private equity. The Company minimizesas hedging tools. Additionally, the Registrants minimize the risk of large losses primarily through diversification but also monitorsmonitor and managesmanage other aspects of risk.
The assets of the AGL Resources Inc. Retirement Plan (AGL plan) were allocated 69% equity, 20% fixed income, 1% cash, and 10% other at December 31, 2016 compared to the Company's targets of 53% equity, 15% fixed income, 2% cash, and 30% other. The investment policy provides for variation around the target asset allocation in the form of ranges.
The assets of the Company's other postretirement benefit plan were allocated 74% equity, 23% fixed income, 1% cash, and 2% other at December 31, 2016 compared to the Company's targets of 72% equity, 24% fixed income, 1% cash, and 3% other. The investment policy provides for variation around the target asset allocation in the form of ranges.
The assets of the AGL plan and the Company's other postretirement benefit plan were each allocated 72% equity and 28% fixed income at December 31, 2015 compared to the Company's targets of 70% to 95% equity, 5% to 20% fixed income, and up to 10% cash. The investment policies provided for some variation in these targets in the form of ranges around the target.
The investment strategy for plan assets related to the Company'sSouthern Company system's qualified pension plan is to be broadly diversified across major asset classes. The asset allocation is established after consideration of various factors that affect the assets and liabilities of the pension plan including, but not limited to, historical and expected returns and interest rates, volatility, correlations of asset classes, the current level of assets and liabilities, and the assumed growth in assets and liabilities. Because a significant portion of the liability of the pension plan is long-term in nature, the assets are invested consistent with long-term investment expectations for

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


return and risk. To manage the actual asset class exposures relative to the target asset allocation, the Southern Company system employs a formal rebalancing program for its pension plan assets.program. As additional risk management, external investment managers and service providers are subject to written guidelines to ensure appropriate and prudent investment practices. Management believes the portfolio is well-diversified with no significant concentrations of risk.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Investment Strategies and Benefit Plan Asset Fair Values
Detailed below is aA description of the investment strategies for the successor period for each major asset category forclasses that the pension and other postretirement benefit plans disclosed above:
Domestic equity. A mixare comprised of, large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.
International equity. A mix of growth stocks and value stocks with both developed and emerging market exposure, managed both actively and through passive index approaches.
Fixed income. A mix of domestic and international bonds.
Special situations. Investments in opportunistic strategiesalong with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies as well as investments in promising new strategies of a longer-term nature.
valuation methods used for fair value measurement, is provided below:
Real estate investments. Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.
DescriptionValuation Methodology
Domestic equity: A mix of large and small capitalization stocks with generally an equal distribution of value and growth attributes, managed both actively and through passive index approaches.

International equity: A mix of large and small capitalization growth and value stocks with developed and emerging markets exposure, managed both actively and through fundamental indexing approaches.
Domestic and international equities such as common stocks, American depositary receipts, and real estate investment trusts that trade on public exchanges are classified as Level 1 investments and are valued at the closing price in the active market. Equity funds with unpublished prices (such as commingled/pooled funds) are valued as Level 2 when the underlying holdings are comprised of Level 1 or Level 2 equity securities.
Fixed income: A mix of domestic and international bonds.
Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
Trust-owned life insurance (TOLI): Investments of taxable trusts aimed at minimizing the impact of taxes on the portfolio.
Investments in TOLI policies are classified as Level 2 investments and are valued based on the underlying investments held in the policy's separate accounts. The underlying assets are equity and fixed income pooled funds that are comprised of Level 1 and Level 2 securities.
Special situations: Investments in opportunistic strategies with the objective of diversifying and enhancing returns and exploiting short-term inefficiencies, as well as investments in promising new strategies of a longer-term nature.

Real estate: Investments in traditional private market, equity-oriented investments in real properties (indirectly through pooled funds or partnerships) and in publicly traded real estate securities.

Private equity: Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.
Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market capitalization rates, recent sales of comparable investments, and independent third-party appraisals. The fair value of partnerships is determined by aggregating the value of the underlying assets less liabilities.
Private equity. Investments in private partnerships that invest in private or public securities typically through privately-negotiated and/or structured transactions, including leveraged buyouts, venture capital, and distressed debt.

The investment strategies forfair values, and actual allocations relative to the predecessor periods followed a policy to preserve the plans' capital and maximize investment earnings in excess of inflation within acceptable levels of capital market volatility. To accomplish this goal, the plans' assets were managed to optimize long-term return while maintaining a high standard of portfolio quality and diversification. In developing the allocation policy for the assetstarget allocations, of the Southern Company system's pension and other postretirement benefit plans the Company examined projections of asset returns and volatility over a long-term horizon. In connection with this analysis, the risk and return trade-offs of alternative asset classes and asset mixes were evaluated given long-term historical relationships as well as prospective capital market returns. The Company also conducted asset-liability studies to match projected asset growth with projected liability growth to determine whether there is sufficient liquidity for projected benefit payments. Asset mix guidelines were developed by incorporating the results of these analyses with an assessment of the Company's risk posture, and taking into account industry practices. The Company periodically evaluated its investment strategy to ensure that plan assets were sufficient to meet the benefit obligations of the plans. As part of the ongoing evaluation, the Company made changes to its targeted asset allocations and investment strategy.
Benefit Plan Asset Fair Values
Following are the fair value measurements for the pension plan and the other postretirement benefit plan assets as ofat December 31, 20162019 and 2015.2018 are presented below. The fair values presented are prepared in accordance with GAAP. For purposes of determining the fair value of the pension plan and other postretirement benefit plan assets and the appropriate level designation, for the successor period, management relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
Valuation methods of the primary fair value measurements disclosed in the 2016 tables are as follows:
Domestic and international equity.Investments in equity securities such as common stocks, American depositary receipts, and real estate investment trusts that trade on a public exchange are The Registrants did not have any investments classified as Level 1 investments and are valued3 at the closing price in the active market. Equity investments with unpublished prices (i.e. pooled funds) are valued as Level 2, when the underlying holdings used to value the investment are comprised of Level 1December 31, 2019 or Level 2 equity securities.
2018.
Fixed income.Investments in fixed income securities are generally classified as Level 2 investments and are valued based on prices reported in the market place. Additionally, the value of fixed income securities takes into consideration certain items such as broker quotes, spreads, yield curves, interest rates, and discount rates that apply to the term of a specific instrument.
Real estate investments, private equity, and special situations investments.Investments in real estate, private equity, and special situations are generally classified as Net Asset Value as a Practical Expedient, since the underlying assets typically do not have publicly available observable inputs. The fund manager values the assets using various inputs and techniques depending on the nature of the underlying investments. Techniques may include purchase multiples for comparable transactions, comparable public company trading multiples, discounted cash flow analysis, prevailing market


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


These fair values exclude cash, receivables related to investment income and pending investment sales, and payables related to pending investment purchases.

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2019:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Southern Company      
Assets:      
Equity:    51%51%
Domestic equity$2,220
$898
$
$3,118
  
International equity2,360
1,286

3,646
  
Fixed income:    23
29
U.S. Treasury, government, and agency bonds
965

965
  
Mortgage- and asset-backed securities
9

9
  
Corporate bonds
1,315

1,315
  
Pooled funds
684

684
  
Cash equivalents and other1,317


1,317
  
Real estate investments539

1,418
1,957
14
12
Special situations

155
155
3
1
Private equity

953
953
9
7
Total$6,436
$5,157
$2,526
$14,119
100%100%
Liabilities:      
Derivatives(1)

(1)  
Total$6,435
$5,157
$2,526
$14,118
100%100%
       
Alabama Power      
Assets:      
Equity:    51%51%
Domestic equity$530
$214
$
$744
  
International equity564
307

871
  
Fixed income:    23
29
U.S. Treasury, government, and agency bonds
230

230
  
Mortgage- and asset-backed securities
2

2
  
Corporate bonds
314

314
  
Pooled funds
163

163
  
Cash equivalents and other315


315
  
Real estate investments129

339
468
14
12
Special situations

37
37
3
1
Private equity

228
228
9
7
Total$1,538
$1,230
$604
$3,372
100%100%
       
capitalization rates, recent sales

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and independent third-party appraisals. Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2019:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Georgia Power      
Assets:      
Equity:    51%51%
Domestic equity$701
$284
$
$985
  
International equity746
407

1,153
  
Fixed income:    23
29
U.S. Treasury, government, and agency bonds
305

305
  
Mortgage- and asset-backed securities
3

3
  
Corporate bonds
415

415
  
Pooled funds
216

216
  
Cash equivalents and other416


416
  
Real estate investments170

448
618
14
12
Special situations

49
49
3
1
Private equity

301
301
9
7
Total$2,033
$1,630
$798
$4,461
100%100%
       
Mississippi Power      
Assets:      
Equity:    51%51%
Domestic equity$101
$41
$
$142
  
International equity108
59

167
  
Fixed income:    23
29
U.S. Treasury, government, and agency bonds
44

44
  
Corporate bonds
60

60
  
Pooled funds
31

31
  
Cash equivalents and other60


60
  
Real estate investments25

65
90
14
12
Special situations

7
7
3
1
Private equity

43
43
9
7
Total$294
$235
$115
$644
100%100%
       

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2019:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Southern Power      
Assets:      
Equity:    51%51%
Domestic equity$27
$11
$
$38
  
International equity28
16

44
  
Fixed income:    23
29
U.S. Treasury, government, and agency bonds
12

12
  
Corporate bonds
16

16
  
Pooled funds
8

8
  
Cash equivalents and other16


16
  
Real estate investments6

17
23
14
12
Special situations

2
2
3
1
Private equity

11
11
9
7
Total$77
$63
$30
$170
100%100%
       
Southern Company Gas      
Assets:      
Equity:    51%51%
Domestic equity$166
$67
$
$233
  
International equity176
96

272
  
Fixed income:    23
29
U.S. Treasury, government, and agency bonds
72

72
  
Mortgage- and asset-backed securities
1

1
  
Corporate bonds
98

98
  
Pooled funds
51

51
  
Cash equivalents and other98


98
  
Real estate investments40

106
146
14
12
Special situations

12
12
3
1
Private equity

71
71
9
7
Total$480
$385
$189
$1,054
100%100%

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2018:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Southern Company      
Assets:      
Equity:    51%53%
Domestic equity$2,102
$1,030
$
$3,132
  
International equity1,344
1,325

2,669
  
Fixed income:    23
24
U.S. Treasury, government, and agency bonds
930

930
  
Mortgage- and asset-backed securities
7

7
  
Corporate bonds
1,195

1,195
  
Pooled funds
654

654
  
Cash equivalents and other270
2

272
  
Real estate investments419

1,361
1,780
14
15
Special situations

171
171
3
1
Private equity

821
821
9
7
Total$4,135
$5,143
$2,353
$11,631
100%100%
       
Alabama Power      
Assets:      
Equity:    51%53%
Domestic equity$466
$228
$
$694
  
International equity298
293

591
  
Fixed income:    23
24
U.S. Treasury, government, and agency bonds
206

206
  
Mortgage- and asset-backed securities
2

2
  
Corporate bonds
265

265
  
Pooled funds
145

145
  
Cash equivalents and other60
1

61
  
Real estate investments93

302
395
14
15
Special situations

38
38
3
1
Private equity

182
182
9
7
Total$917
$1,140
$522
$2,579
100%100%
       

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2018:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Georgia Power      
Assets:      
Equity:    51%53%
Domestic equity$663
$325
$
$988
  
International equity424
418

842
  
Fixed income:    23
24
U.S. Treasury, government, and agency bonds
294

294
  
Mortgage- and asset-backed securities
2

2
  
Corporate bonds
377

377
  
Pooled funds
206

206
  
Cash equivalents and other85
1

86
  
Real estate investments132

429
561
14
15
Special situations

54
54
3
1
Private equity

259
259
9
7
Total$1,304
$1,623
$742
$3,669
100%100%
       
Mississippi Power      
Assets:      
Equity:    51%53%
Domestic equity$91
$45
$
$136
  
International equity59
59

118
  
Fixed income:    23
24
U.S. Treasury, government, and agency bonds
40

40
  
Corporate bonds
52

52
  
Pooled funds
28

28
  
Cash equivalents and other12


12
  
Real estate investments18

59
77
14
15
Special situations

7
7
3
1
Private equity

36
36
9
7
Total$180
$224
$102
$506
100%100%
       

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2018:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Southern Power      
Assets:      
Equity:    51%53%
Domestic equity$22
$11
$
$33
  
International equity14
14

28
  
Fixed income:    23
24
U.S. Treasury, government, and agency bonds
10

10
  
Corporate bonds
13

13
  
Pooled funds
7

7
  
Cash equivalents and other3


3
  
Real estate investments4

15
19
14
15
Special situations

2
2
3
1
Private equity

9
9
9
7
Total$43
$55
$26
$124
100%100%
       
Southern Company Gas      
Assets:      
Equity:    51%53%
Domestic equity$145
$71
$
$216
  
International equity92
91

183
  
Fixed income:







23
24
U.S. Treasury, government, and agency bonds
64

64
  
Corporate bonds
82

82
  
Pooled funds
45

45
  
Cash equivalents and other19


19
  
Real estate investments29

94
123
14
15
Special situations

12
12
3
1
Private equity

56
56
9
7
Total$285
$353
$162
$800
100%100%

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The fair value of partnerships is determined by aggregating the valuevalues of the underlying assets less liabilities.
For purposes of determining the fair value of the pension plan andapplicable Registrants' other postretirement benefit plan assets and the appropriate level designation for the predecessor periods, management relies on information provided by the plan's trustee. This information is reviewed and evaluated by management with changes made to the trustee information as appropriate.
The fair values of pension plan assets as ofat December 31, 20162019 and 20152018 are presented below. The Registrants did not have any investments classified as Level 3 at December 31, 2019 or 2018. These fair value measurements exclude cash, receivables related to investment income, pending investmentsinvestment sales, and payables related to pending investment purchases. For 2016, special situations (absolute return and hedge funds) investment assets are presented in the table below based on the nature of the investment.
Fair Value Measurements Using  Fair Value Measurements Using  
Quoted Prices
in Active Markets for Identical Assets
 Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical ExpedientTotalTarget AllocationActual Allocation
Successor – As of December 31, 2016(Level 1) (Level 2) (Level 3) (NAV) Total
At December 31, 2019:(Level 1)(Level 2)(NAV)TotalTarget AllocationActual Allocation
(in millions)(in millions)
Southern Company  
Assets:           
Domestic equity(*)
$142
 $343
 $
 $
 $485
International equity(*)

 185
 
 
 185
Equity: 63%64%
Domestic equity$95
$81
$
$176
 
International equity69
80

149
 
Fixed income:          28
30
U.S. Treasury, government, and agency bonds
 85
 
 
 85

31

31
 
Corporate bonds
 41
 
 
 41

35

35
 
Pooled funds
 66
 
 
 66

82

82
 
Cash equivalents and other12
 5
 
 83
 100
42


42
 
Trust-owned life insurance
463

463
 
Real estate investments4
 
 
 15
 19
15

38
53
5
4
Special situations

4
4
1

Private equity
 
 
 2
 2


25
25
3
2
Total$158
 $725
 $
 $100
 $983
$221
$772
$67
$1,060
100%100%
  
Alabama Power  
Assets:  
Equity: 68%67%
Domestic equity$26
$8
$
$34
 
International equity21
11

32
 
Fixed income: 24
27
U.S. Treasury, government, and agency bonds
10

10
 
Corporate bonds
11

11
 
Pooled funds
6

6
 
Cash equivalents and other12


12
 
Trust-owned life insurance
281

281
 
Real estate investments5

12
17
4
4
Special situations

1
1
1

Private equity

8
8
3
2
Total$64
$327
$21
$412
100%100%
  
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report




  Predecessor – As of December 31, 2015
  
Pension plans (a)
In millions Level 1 Level 2 Level 3 Total % of total
Cash $4
 $
 $
 $4
 %
Equity securities:          
U.S. large cap(b)
 $75
 $199
 $
 $274
 32%
U.S. small cap(b)
 57
 24
 
 81
 9%
International companies(c)
 
 125
 
 125
 15%
Emerging markets(d)
 
 28
 
 28
 3%
Total equity securities $132
 $376
 $
 $508
 59%
Fixed income securities:          
Corporate bonds(e)
 $
 $91
 $
 $91
 11%
Other (or gov't/muni bonds) 
 151
 
 151
 18%
Total fixed income securities $
 $242
 $
 $242
 29%
Other types of investments:          
Global hedged equity(f)
 $
 $
 $40
 $40
 5%
Absolute return(g)
 
 
 42
 42
 5%
Private capital(h)
 
 
 20
 20
 2%
Total other investments $
 $
 $102
 $102
 12%
Total assets at fair value $136
 $618
 $102
 $856
 100%
% of fair value hierarchy 16% 72% 12% 100%  
 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical ExpedientTotalTarget AllocationActual Allocation
At December 31, 2019:(Level 1)(Level 2)(NAV)
 (in millions)  
Georgia Power      
Assets:      
Equity:    60%61%
Domestic equity$48
$7
$
$55
  
International equity25
36

61
  
Fixed income:    33
34
U.S. Treasury, government, and agency bonds
7

7
  
Corporate bonds
11

11
  
Pooled funds
45

45
  
Cash equivalents and other16


16
  
Trust-owned life insurance
182

182
  
Real estate investments5

11
16
4
3
Special situations

1
1
1

Private equity

8
8
2
2
Total$94
$288
$20
$402
100%100%
       
Mississippi Power      
Assets:      
Equity:    43%41%
Domestic equity$3
$1
$
$4
  
International equity4
2

6
  
Fixed income:    37
42
U.S. Treasury, government, and agency bonds
6

6
  
Corporate bonds
2

2
  
Pooled funds
1

1
  
Cash equivalents and other2


2
  
Real estate investments1

2
3
11
10
Special situations



2
1
Private equity

1
1
7
6
Total$10
$12
$3
$25
100%100%
       
(a)
Includes $9 million at December 31, 2015 of medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the other retirement benefits.
(b)Includes funds that invest primarily in U.S. common stocks.
(c)Includes funds that invest primarily in foreign equity and equity-related securities.
(d)Includes funds that invest primarily in common stocks of emerging markets.
(e)Includes funds that invest primarily in investment grade debt and fixed income securities.
(f)Includes funds that invest in limited/general partnerships, managed accounts, and other investment entities issued by non-traditional firms or "hedge funds."
(g)Includes funds that invest primarily in investment vehicles and commodity pools as a "fund of funds."
(h)Includes funds that invest in private equity and small buyout funds, partnership investments, direct investments, secondary investments, directly/indirectly in real estate and may invest in equity securities of real estate related companies, real estate mortgage loans, and real estate mezzanine loans.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


The fair values of other postretirement benefit plan assets as of December 31, 2016 and 2015 are presented below. These fair value measurements exclude cash, receivables related to investment income, pending investments sales, and payables related to pending investment purchases. For 2016, special situations (absolute return and hedge funds) investment assets are presented in the table below based on the nature of the investment.
Fair Value Measurements Using  Fair Value Measurements Using  
Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical ExpedientTotalTarget AllocationActual Allocation
Successor – As of December 31, 2016(Level 1) (Level 2) (Level 3) (NAV) Total
At December 31, 2019:(Level 1)(Level 2)(NAV)TotalTarget AllocationActual Allocation
(in millions)(in millions)
Southern Company Gas  
Assets:           
Domestic equity(*)
$3
 $58
 $
 $
 $61
International equity(*)

 18
 
 
 18
Equity: 72%73%
Domestic equity$2
$58
$
$60
 
International equity2
21

23
 
Fixed income:        

 26
25
U.S. Treasury, government, and agency bonds
1

1
 
Corporate bonds
1

1
 
Pooled funds
 23
 
 
 23

25

25
 
Cash equivalents and other1
 
 
 2
 3
2


2
 
Real estate investments

1
1
1
1
Private equity

1
1
1
1
Total$4
 $99
 $
 $2
 $105
$6
$106
$2
$114
100%100%
(*)Level 1 securities consist of actively traded stocks while Level 2 securities consist of pooled funds. Management believes that the portfolio is well-diversified with no significant concentrations of risk.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2018:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Southern Company      
Assets:      
Equity:    62%62%
Domestic equity$100
$76
$
$176
  
International equity45
75

120
  
Fixed income:    29
30
U.S. Treasury, government, and agency bonds
34

34
  
Corporate bonds
35

35
  
Pooled funds
81

81
  
Cash equivalents and other13


13
  
Trust-owned life insurance
386

386
  
Real estate investments13

40
53
5
5
Special situations

4
4
1

Private equity

24
24
3
3
Total$171
$687
$68
$926
100%100%
       
Alabama Power      
Assets:      
Equity:    64%66%
Domestic equity$35
$10
$
$45
  
International equity12
12

24
  
Fixed income:    28
28
U.S. Treasury, government, and agency bonds
10

10
  
Corporate bonds
11

11
  
Pooled funds
6

6
  
Cash equivalents and other3


3
  
Trust-owned life insurance
233

233
  
Real estate investments4

13
17
4
4
Special situations

2
2
1

Private equity

8
8
3
2
Total$54
$282
$23
$359
100%100%
       


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report


 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2018:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Georgia Power      
Assets:      
Equity:    60%59%
Domestic equity$41
$9
$
$50
  
International equity17
32

49
  
Fixed income:    33
35
U.S. Treasury, government, and agency bonds
7

7
  
Corporate bonds
10

10
  
Pooled funds
44

44
  
Cash equivalents and other5


5
  
Trust-owned life insurance
153

153
  
Real estate investments4

11
15
4
4
Special situations

2
2
1

Private equity

7
7
2
2
Total$67
$255
$20
$342
100%100%
       
Mississippi Power      
Assets:      
Equity:    41%42%
Domestic equity$3
$2
$
$5
  
International equity2
2

4
  
Fixed income:    38
39
U.S. Treasury, government, and agency bonds
6

6
  
Corporate bonds
2

2
  
Pooled funds
1

1
  
Cash equivalents and other1


1
  
Real estate investments1

2
3
11
12
Special situations



3
1
Private equity

1
1
7
6
Total$7
$13
$3
$23
100%100%
       


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report
  Predecessor �� As of December 31, 2015
  Welfare plans
In millions Level 1 Level 2 Level 3 Total % of total
Cash $1
 $
 $
 $1
 1%
Equity securities:          
U.S. large cap(a)
 $
 $52
 $
 $52
 58%
U.S. small cap(a)
 
 
 
 
 %
International companies(b)
 
 15
 
 15
 17%
Emerging markets(c)
 
 
 
 
 %
Total equity securities $
 $67
 $
 $67
 75%
Fixed income securities:          
Corporate bonds(d)
 $
 $22
 $
 $22
 24%
Other (or gov't/muni bonds) 
 
 
 
 %
Total fixed income securities $
 $22
 $
 $22
 24%
Other types of investments:          
Global hedged equity(e)
 $
 $
 $
 $
 %
Absolute return(f)
 
 
 
 
 %
Private capital(g)
 
 
 
 
 %
Total other investments $
 $
 $
 $
 %
Total assets at fair value $1
 $89
 $
 $90
 100%
% of fair value hierarchy 1% 99% % 100%  

(a)Includes funds that invest primarily in U.S. common stocks.
(b)Includes funds that invest primarily in foreign equity and equity-related securities.
(c)Includes funds that invest primarily in common stocks of emerging markets.
(d)Includes funds that invest primarily in investment grade debt and fixed income securities.
(e)Includes funds that invest in limited/general partnerships, managed accounts, and other investment entities issued by non-traditional firms or "hedge funds."
(f)Includes funds that invest primarily in investment vehicles and commodity pools as a "fund of funds."
(g)Includes funds that invest in private equity and small buyout funds, partnership investments, direct investments, secondary investments, directly/indirectly in real estate and may invest in equity securities of real estate related companies, real estate mortgage loans, and real estate mezzanine loans.
 Fair Value Measurements Using   
 Quoted Prices in Active Markets for Identical Assets
Significant
Other
Observable
Inputs
Net Asset Value as a Practical Expedient Target AllocationActual Allocation
At December 31, 2018:(Level 1)(Level 2)(NAV)Total
 (in millions)  
Southern Company Gas      
Assets:      
Equity:    71%69%
Domestic equity$2
$47
$
$49
  
International equity1
17

18
  
Fixed income:



25
28
U.S. Treasury, government, and agency bonds
1

1


Corporate bonds
1

1


Pooled funds
24

24


Cash equivalents and other1


1


Real estate investments

1
1
2
2
Special situations



1

Private equity

1
1
1
1
Total$4
$90
$2
$96
100%100%

Employee Savings Plan
SCS sponsorsSouthern Company and its subsidiaries also sponsor 401(k) defined contribution plans covering certain eligible Southern Company Gas employees. The AGL Resources Inc. 401(k) planssubstantially all employees and provide matching contributions of either 65% on up to 8%specified percentages of an employee's eligible compensation, or a 100% matching contribution on up to 3% of an employee's eligible compensation, followed by a 75% matching contribution on up to the next 3% of an employee's eligible compensation.pay. Total matching contributions made to the AGL Resources Inc. 401(k) plans for the successor period ended December 31, 2016 were $8 million2019, 2018, and for the predecessor periods ended June 30, 2016 and December 31, 2015 and 2014 were $10 million, $16 million, and $14 million, respectively.
For employees not accruing a benefit under the AGL Resources Inc. Retirement Plan, additional contributions made to the 401(k) plans for the successor period ended December 31, 2016 were not material and for the predecessor periods ended June 30, 2016 and December 31, 2015 and 2014 were $2 million, $2 million, and $1 million, respectively.
3. CONTINGENCIES AND REGULATORY MATTERS
General Litigation Matters
Nicor Gas and Nicor Energy Services Company, wholly-owned subsidiaries of the Company, and Nicor Inc. are defendants in a putative class action initially filed in 2011 in state court in Cook County, Illinois. The plaintiffs purport to represent a class of the customers who purchased the Gas Line Comfort Guard product from Nicor Energy Services Company and variously allege that the marketing, sale, and billing of the Gas Line Comfort Guard product violated the Illinois Consumer Fraud and Deceptive Business Practices Act, constituting common law fraud and resulting in unjust enrichment of these entities. The plaintiffs seek, on

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


behalf of the classes they purport to represent, actual and punitive damages, interest, costs, attorney fees, and injunctive relief. On February 8, 2017 the judge denied the plaintiffs' motion for class certification and the Company's motion for summary judgment. The ultimate outcome of this matter cannot be determined at this time.
The Company is assessing its alleged involvement in an incident that occurred in one of its service territories that resulted in several deaths, injuries, and property damage. One of the Company's utilities has been named as one of the defendants in several lawsuits related to this incident. The Company has insurance that provides full coverage of any financial exposure in excess of $11 million that is related to this incident. During the successor period ended December 31, 2016 and the predecessor period ended December 31, 2015, the Company recorded reserves for substantially all of its potential exposure from these cases. The ultimate outcome of this matter cannot be determined at this time.
The Company is subject to certain claims and legal actions arising in the ordinary course of business. The ultimate outcome of these matters and such pending or potential litigation against the Company cannot be determined at this time; however, for current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, arising from such current proceedings would have a material effect on the Company's financial statements.
Environmental Matters
The Company's operations are subject to extensive regulation by state and federal environmental agencies under a variety of statutes and regulations governing environmental media, including the handling and disposal of waste and releases of hazardous substances. Compliance with these environmental requirements involves significant capital and operating costs to clean up affected sites. The Company conducts studies to determine the extent of any required clean up and has recognized in its financial statements the costs to clean up known impacted sites. The natural gas distribution utilities in Illinois, New Jersey, Georgia, and Florida have each received authority from their applicable state regulatory agencies to recover approved environmental compliance costs through regulatory mechanisms.
The Company is subject to environmental remediation liabilities associated with 46 former MGP sites in five different states. Accrued environmental remediation costs of $426 million have been recorded in the consolidated balance sheets as of December 31, 2016, $69 million of which is expected to be incurred over the next 12 months. These environmental remediation expenditures are recoverable from customers through rate mechanisms approved by the applicable state regulatory agencies, with the exception of one site representing $5 million of the total accrued remediation costs.
In September 2015, the EPA filed an administrative complaint and notice of opportunity for hearing against Nicor Gas. The complaint alleges violation of the regulatory requirements applicable to polychlorinated biphenyls in the Nicor Gas distribution system and the EPA seeks a total civil penalty of approximately $0.3 million. On January 26, 2017, the EPA notified Nicor Gas that it agreed to voluntarily dismiss its administrative complaint with prejudice and without payment of a civil penalty or other further obligation on the part of Nicor Gas.
The Company's ultimate environmental compliance strategy and future environmental capital expenditures will be affected by the final requirements of new or revised environmental regulations and the outcome of any legal challenges to the environmental rules. The ultimate outcome of these matters cannot be determined at this time.
In 2014, the Company reached a settlement with an insurance company for environmental claims relating to potential contamination at several MGP sites in New Jersey and North Carolina. The terms of the settlement required the insurance company to pay the Company a total of $77 million in two installments. The Company received a $45 million installment in 2014 and the remaining $32 million in July 2015. The New Jersey BPU approved the use of the insurance proceeds to reduce the regulatory assets associated with environmental remediation costs that otherwise would have been recovered from Elizabethtown Gas customers.
FERC Matters
At December 31, 2016, gas midstream operations was involved in three gas pipeline construction projects. These projects, along with the Company's existing pipelines, are intended to provide diverse sources of natural gas supplies to customers, resolve current and long-term supply planning for new capacity, enhance system reliability, and generate economic development in the areas served. One of these projects received FERC approval in August 2016. The remaining projects are pending FERC approval. The ultimate outcome of this matter cannot be determined at this time.
Regulatory Matters
Regulatory Infrastructure Programs
The Company has infrastructure improvement programs at several of its utilities. Descriptions of these programs are as follows:

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Nicor Gas
In 2013, Illinois enacted legislation that allows Nicor Gas to provide more widespread safety and reliability enhancements to its distribution system. The legislation stipulates that rate increases to customer bills as a result of any infrastructure investments shall not exceed an annual average of 4.0% of base rate revenues. In 2014, the Illinois Commission approved the nine-year regulatory infrastructure program, Investing in Illinois, under which Nicor Gas implemented rates that became effective in March 2015.
Atlanta Gas Light
Atlanta Gas Light's four-year STRIDE program, which was approved by the Georgia PSC in 2013, is comprised of the Integrated System Reinforcement Program (i-SRP), the Integrated Customer Growth Program (i-CGP), and the Integrated Vintage Plastic Replacement Program (i-VPR), and consists of infrastructure development, enhancement, and replacement programs that are used to update and expand distribution systems and LNG facilities, improve system reliability, and meet operational flexibility and growth. STRIDE includes a monthly surcharge on firm customers that was approved by the Georgia PSC to provide recovery of the revenue requirement for the ongoing programs and the PRP. This surcharge began in January 2015 and will continue through 2025.
The i-SRP program authorized $445 million of capital spending for projects to upgrade Atlanta Gas Light's distribution system and LNG facilities in Georgia, improve its peak-day system reliability and operational flexibility, and create a platform to meet long-term forecasted growth. Under i-SRP, Atlanta Gas Light must file an updated 10-year forecast of infrastructure requirements along with a new construction plan every three years for review and approval by the Georgia PSC. Atlanta Gas Light's most recent plan was approved in 2014. On August 1, 2016, Atlanta Gas Light filed a petition with the Georgia PSC for approval of a four-year extension of its i-SRP seeking approval to invest an additional $177 million to improve and upgrade its core gas distribution system in years 2017 through 2020. Capital investment associated with this filing for 2017 was included in the Georgia Ratemaking Adjustment Mechanism (GRAM) approved by the Georgia PSC on February 21, 2017. Capital investment in subsequent years under this filing will be included in future annual GRAM filings. See "Base Rate Cases" herein for additional information.
The i-CGP program authorized Atlanta Gas Light to spend $91 million on projects to extend its pipeline facilities to serve customers in areas without pipeline access and create new economic development opportunities in Georgia.
The i-VPR program, which was approved by the Georgia PSC in 2013, authorized Atlanta Gas Light to spend $275 million to replace 756 miles of aging plastic pipe that was installed primarily in the mid-1960s to the early 1980s. Atlanta Gas Light has identified approximately 3,300 miles of vintage plastic mains in its system that should be considered for potential replacement over the next 15 to 20 years under this program.
The orders for the STRIDE programs provide for recovery of all prudent costs incurred in the performance of the program. Atlanta Gas Light will recover from end-use customers, through billings to Marketers, the costs related to the programs net of any cost savings from the programs. All such amounts will be recovered through a combination of straight-fixed-variable rates and a STRIDE revenue rider surcharge. The regulatory asset represents recoverable incurred costs related to the programs that will be collected in future rates charged to customers through the rate riders. The future expected costs to be recovered through rates related to allowed, but not incurred costs, are recognized in an unrecognized ratemaking amount that is not reflected on the consolidated balance sheets. This allowed cost is primarily the equity return on the capital investment under the program. See "Unrecognized Ratemaking Amounts"herein for additional information.
Atlanta Gas Light capitalizes and depreciates the capital expenditure costs incurred from the STRIDE programs over the life of the assets. Operations and maintenance costs are expensed as incurred. Recoveries, which are recorded as revenue, are based on a formula that allows Atlanta Gas Light to recover operations and maintenance costs in excess of those included in its current base rates, depreciation, and an allowed rate of return on capital expenditures. However, Atlanta Gas Light is allowed the recovery of carrying costs on the under-recovered balance resulting from the timing difference. All components of Atlanta Gas Light's STRIDE program were approved by the Georgia PSC in connection with the new rate adjustment mechanism for Atlanta Gas Light. See "Base Rate Cases" herein for additional information.
Elizabethtown Gas
Elizabethtown Gas' extension of the Aging Infrastructure Replacement (AIR) enhanced infrastructure program effective in 2013 allowed for infrastructure investment of $115 million over four years, and is focused on the replacement of aging cast iron in its pipeline system. Carrying charges on the additional capital spend are being accrued and deferred for regulatory purposes at a WACC of 6.65%. In conjunction with the general base rate case filed with the New Jersey BPU on September 1, 2016, Elizabethtown Gas requested recovery of the AIR program. See "Base Rate Cases" herein for additional information.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


In 2014, the New Jersey BPU approved Natural Gas Distribution Utility Reinforcement Effort (ENDURE), a program that improved Elizabethtown Gas' distribution system's resiliency against coastal storms and floods. Under the plan, Elizabethtown Gas invested $15 million in infrastructure and related facilities and communication planning over a one-year period from August 2014 through September 2015. Effective November 2015, Elizabethtown Gas increased its base rates for investments made under the program.
In September 2015, Elizabethtown Gas filed the Safety, Modernization and Reliability Tariff (SMART) plan with the New Jersey BPU seeking approval to invest more than $1.1 billion to replace 630 miles of vintage cast iron, steel, and copper pipeline, as well as 240 regulator stations. If approved, the program is expected to be completed by 2027. As currently proposed, costs incurred under the program would be recovered through a rider surcharge over a period of 10 years.
The ultimate outcome of these matters cannot be determined at this time.
Virginia Natural Gas
In 2012, the Virginia Commission approved the Steps to Advance Virginia's Energy (SAVE) program, an accelerated infrastructure replacement program, to be completed over a five-year period. This program includes a maximum allowance for capital expenditures of $25 million per year, not to exceed $105 million in total. SAVE is subject to annual review by the Virginia Commission. Virginia Natural Gas is recovering these program costs through a rate rider that became effective in 2012.
On March 9, 2016, the Virginia Commission approved an extension to the SAVE program to replace more than 200 miles of aging pipeline infrastructure. In accordance with the order approving the program, Virginia Natural Gas may invest up to $30 million in 2016 and up to $35 million annually through 2021. Additionally, Virginia Natural Gas may exceed the allowed program expenditures by up to a total of $5 million, of which $2 million was used in 2016.
Florida City Gas
In September 2015, the Florida PSC approved Florida City Gas' Safety, Access, and Facility Enhancement program, under which costs incurred for replacing aging pipes will be recovered through a rate rider with annual adjustments and true-ups. Under the program, Florida City Gas is authorized to spend $105 million over a 10-year period on infrastructure relocation and enhancement projects.
Customer Refunds
In the third quarter 2016, Elizabethtown Gas provided direct per-customer rate credits totaling $17.5 million to its customers in accordance with the Merger approval from the New Jersey BPU. These rate credits were allocated among Elizabethtown Gas' customer classes based on the base rate revenues reflected in the rates that resulted from its most recent base rate proceeding.
In the fourth quarter 2016, Elkton Gas provided direct per-customer rate credits totaling $0.4 million to its customers in accordance with the Merger approval from the Maryland PSC. These rate credits were funded from an increase in the amount paid through Elkton Gas' asset management agreement.
PRP Settlement
In October 2015, Atlanta Gas Light received a final order from the Georgia PSC, which represented a resolution of all matters previously outstanding before the Georgia PSC, including a final determination of the true-up of allowed unrecovered revenue through December 2014. This order allows Atlanta Gas Light to recover $144 million of the $178 million unrecovered program revenue that was requested in its February 2015 filing. The remaining unrecovered amount related primarily to the previously unrecognized ratemaking amount, and did not have a material impact on the Company's consolidated financial statements. The Company also recognized $1 million of interest expense and $5 million in operations and maintenance expense related to the PRP on the Company's consolidated statements of income for the predecessor year ended December 31, 2015. See "Unrecognized Ratemaking Amounts"herein for additional information.
Atlanta Gas Light began recovering $144 million in October 2015 through the monthly PRP surcharge of $0.82, or approximately $15 million annually, which increased by $0.81 on October 1, 2016. The monthly PRP surcharge is scheduled to increase by another $0.81 on October 1, 2017. As part of the Georgia PSC's approval, this increase will commence earlier with its implementation under GRAM. The PRP surcharge will remain effective until the earlier of the full recovery of the under-recovered amount or December 31, 2025.
One of the capital projects under the PRP experienced construction issues and Atlanta Gas Light was required to complete mitigation work prior to placing it in service. These mitigation costs will be included in future base rates in 2018. See "Base Rate Cases" herein for additional information on GRAM.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Provisions in the order resulted in the recognition of $5 million in operations and maintenance expense for the year ended December 31, 2015 on the Company's consolidated statements of income. Atlanta Gas Light continues to pursue contractual and legal claims against certain third-party contractors and will retain any amounts recorded. The ultimate outcome of this matter cannot be determined at this time.
Base Rate Cases
On December 5, 2016, Atlanta Gas Light filed a joint stipulation with the staff of the Georgia PSC seeking an annual rate review/adjustment mechanism, GRAM. This new mechanism will adjust rates up or down annually and will not collect revenue through special riders and surcharges for the STRIDE infrastructure programs. Also in this filing, Atlanta Gas Light requested an adjustment in base rates designed to collect an additional $20 million in annual revenues effective March 2017. On February 21, 2017, the Georgia PSC approved the joint stipulation and requested base rate adjustment.
On September 1, 2016, Elizabethtown Gas filed a general base rate case with the New Jersey BPU as required under its AIR program, requesting an increase in annual revenues of $19 million, based on an allowed ROE of 10.25%. The Company expects the New Jersey BPU to issue an order on the filing in the third quarter 2017.
On December 13, 2016, Virginia Natural Gas filed a notice of intent with the Virginia Commission as required at least 60 days prior to filing a general base rate case.
The ultimate outcome of these matters cannot be determined at this time.
Gas Cost Prudence Review
In 2014, the Illinois Commission staff and the CUB filed testimony in the Nicor Gas 2003 gas cost prudence review disputing certain gas loan transactions offered by Nicor Gas under its Chicago Hub services and requesting refunds of $18 million and $22 million, respectively. On February 10, 2016, the administrative law judge issued a proposed order affirming an original order by the Illinois Commission, which was approved by the Illinois Commission on March 23, 2016 and concluded this matter. The Illinois Commission approved the purchase gas adjustments for the years 2004 through 2007 on August 9, 2016 and for the years 2008 and 2009 on August 24, 2016. As a condition of these approvals, Nicor Gas agreed to revise the way in which interest is reflected in the calculations beginning in 2013. The Company does not expect this revision to have a material impact on its consolidated financial statements. The gas cost prudence reviews for years 2010 through 2015 are underway. The ultimate outcome of these matters cannot be determined at this time.
energySMART
In 2014, the Illinois Commission approved Nicor Gas' energySMART program, which outlines energy efficiency offerings and therm reduction goals with spending of $93 million over a three-year period that began in 2014. On December 7, 2016, new energy legislation was signed in Illinois that extended the current program through December 31, 2017.
Unrecognized Ratemaking Amounts
The following table illustrates the Company's authorized ratemaking amounts that are not recognized on its balance sheets. These amounts are primarily composed of an allowed equity rate of return on assets associated with certain of the Company's regulatory infrastructure programs. These amounts will be recognized as revenues in the Company's financial statements in the periods they are billable to customers.
 Successor  Predecessor
 December 31, 2016  December 31, 2015
 (in millions)  (in millions)
Atlanta Gas Light$110
  $103
Virginia Natural Gas11
  12
Elizabethtown Gas6
  4
Nicor Gas2
  3
Total$129
  $122
4. JOINT OWNERSHIP AGREEMENTS
In 2014, the Company entered into two arrangements associated with the Dalton Pipeline. The first was a construction and ownership agreement through which the Company has a 50% undivided ownership interest jointly with The Williams Companies,

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Inc. in the 115-mile Dalton Pipeline that is being constructed to serve as an extension of the Transco natural gas pipeline system into northwest Georgia. The Company also entered into an agreement to lease its 50% undivided ownership in the Dalton Pipeline once it is placed in service. Under the lease, the Company will receive approximately $26 million annually for an initial term of 25 years. The lessee will be responsible for maintaining the pipeline during the lease term and for providing service to transportation customers under its FERC-regulated tariff. Engineering design work is complete and construction began in September 2016. At December 31, 2016 and December 31, 2015, the Company's 50% share of construction costs was $124 million and $33 million, respectively, and is reflected in construction work in progress in the consolidated balance sheets.
Variable Interest Entities
SouthStar, previously a joint venture owned 85% by the Company and 15% by Piedmont, was the only VIE for which the Company was the primary beneficiary, prior to October 3, 2016 when the Company completed its purchase of Piedmont's remaining interest in SouthStar.
In December 2015, Georgia Natural Gas Company (GNG), a 100%-owned, direct subsidiary of the Company, notified Piedmont of its election, pursuant to a change in control of SouthStar, to purchase Piedmont's 15% interest in SouthStar at fair market value. This purchase was contingent upon the closing of the merger between Piedmont and Duke Energy Corporation (Duke Energy). On February 12, 2016, GNG and Piedmont entered into a letter agreement pursuant to which GNG agreed to pay Piedmont $160 million as the fair value for Piedmont's entire ownership interest in SouthStar. After Piedmont and Duke Energy completed their merger in October 2016, GNG completed its purchase of Piedmont's interest in SouthStar on October 3, 2016 and paid a purchase price of $160 million and $15 million for Piedmont's share of SouthStar's 2016 earnings through the date of acquisition.
At December 31, 2015, the Company presented the noncontrolling interest related to Piedmont's interest in SouthStar as a component in equity. During the first quarter 2016, the Company reclassified its noncontrolling interest, whose redemption was beyond the Company's control, as a contingently redeemable noncontrolling interest. Upon Piedmont and Duke Energy obtaining the necessary merger approval, the Company deemed this noncontrolling interest to be mandatorily redeemable and reclassified it to a current liability during the third quarter 2016. The roll-forwards of the redeemable noncontrolling interest for the successor period of July 1, 2016 through December 31, 2016 and the predecessor period of January 1, 2016 through June 30, 2016 are detailed below:
Predecessor –(in millions)
Balance at December 31, 2015$
Reclassification of noncontrolling interest to contingently redeemable noncontrolling interest46
Net income attributable to noncontrolling interest14
Distribution to noncontrolling interest(19)
Balance at June 30, 2016$41
Successor –(in millions)
Balance at July 1, 2016$174
Reclassification of contingently redeemable noncontrolling interest to mandatorily redeemable
noncontrolling interest
(174)
Balance at December 31, 2016$
The Company's cash flows used for financing activities include SouthStar's distribution to Piedmont for its portion of SouthStar's annual earnings from the previous year, which generally occurred in the first quarter of each year. For the successor period of July 1, 2016 through December 31, 2016, SouthStar made a distribution of $15 million upon completion of the purchase of Piedmont's interest in SouthStar. For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, SouthStar distributed to Piedmont $19 million, $18 million, and $17 million, respectively.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Equity Method Investments
The carrying amounts of the Company's equity method investments as of December 31, 2016 and 2015 and related income from those investments for the successor period ended December 31, 2016 and predecessor periods ended June 30, 2016 and December 31, 2015 and 2014 were as follows:
 Southern Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
Southern Company Gas
 (in millions)
2019$113
$25
$27
$4
$2
$15
2018119
24
26
5
3
18
2017118
23
26
5
N/A
19
Balance Sheet InformationSuccessor  Predecessor
 December 31, 2016  December 31, 2015
 (in millions)  (in millions)
SNG$1,394
  $
Triton44
  49
Horizon Pipeline30
  14
PennEast Pipeline22
  9
Atlantic Coast Pipeline33
  7
Pivotal JAX LNG, LLC16
  
Other2
  1
Total$1,541
  $80
Income Statement InformationSuccessor  Predecessor
 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015 2014
 (in millions)  (in millions)
SNG$56
  $
 $
 $
Triton2
  1
 4
 6
Horizon Pipeline1
  1
 2
 2
Atlantic Coast Pipeline1
  
 
 
Total$60
  $2
 $6
 $8
SNG
On September 1, 2016, the Company, through a wholly-owned, indirect subsidiary, acquired a 50% equity interest in SNG, which is accounted for as an equity method investment. See Note 11 under "Investment in SNG" for additional information on this investment. Selected financial information of SNG since the Company's September 1, 2016 acquisition of a 50% equity interest is as follows:
Balance Sheet InformationAs of December 31, 2016
 (in millions)
Current assets$95
Property, plant, and equipment2,451
Deferred charges and other assets129
Total Assets$2,675
  
Current liabilities$588
Long-term debt706
Other deferred charges and other liabilities22
Total Liabilities$1,316
  
Total Stockholders' Equity1,359
Total Liabilities and Stockholders' Equity$2,675

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Income Statement InformationSeptember 1, 2016
through December 31, 2016
 (in millions)
Revenues$230
Operating income$138
Net income$115
Other Investments
Triton
The Company has an investment in Triton, a cargo container leasing company, which is aggregated into its all other segment. Container equipment that is acquired by Triton is accounted for in tranches as defined in Triton's operating agreement and investors make capital contributions to Triton to invest in each of the tranches. As of December 31, 2016, the Company had invested in seven tranches established by Triton.
Horizon Pipeline
The Company owns aninterest in a joint venture with Natural Gas Pipeline Company of America that is regulated by the FERC. Horizon Pipeline operates a 70-mile natural gas pipeline from Joliet, Illinois to near the Wisconsin/Illinois border. Nicor Gas typically contracts for 70% to 80% of the total annual capacity.
PennEast Pipeline
In 2014, the Company entered into a partnership in which it holds a 20% ownership interest in an interstate pipeline company formed to develop and operate a 118-mile natural gas pipeline between New Jersey and Pennsylvania. The initial transportation capacity of 1.0 billion cubic feet (Bcf) per day, is under long-term contracts, mainly by public utilities and other market-serving entities, such as electric generation companies, in New Jersey, Pennsylvania, and New York.
Atlantic Coast Pipeline
In 2014, the Company entered into a project in which it holds a 5% ownership interest in an interstate pipeline company formed to develop and operate a 594-mile natural gas pipeline in North Carolina, Virginia, and West Virginia with initial transportation capacity of 1.5 Bcf per day.
Pivotal JAX LNG, LLC
The Company owns a 50% interest in a planned LNG liquefaction and storage facility in Jacksonville, Florida. Once construction is complete and the facility is operational, it will be outfitted with a 2.0 million gallon storage tank with the capacity to produce in excess of 120,000 gallons of LNG per day.
5. INCOME TAXES
Subsequent to the Merger, Southern Company will file a consolidated federal income tax return and various combined and separate state income tax returns on behalf of the Company. Under a joint consolidated income tax allocation agreement, each Southern Company subsidiary's current and deferred tax expense is computed on a stand-alone basis and no subsidiary is allocated more current expense than would be paid if it filed a separate income tax return. In accordance with IRS regulations, each company is jointly and severally liable for the federal tax liability. Prior to the Merger, the Company filed a U.S. federal consolidated income tax return and various state income tax returns.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Current and Deferred Income Taxes
Details of income tax provisions for the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014 are as follows:
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
 (in millions)  (in millions)
Federal —        
Current$
  $67
 $(13) $111
Deferred65
  8
 198
 184
 65
  75
 185
 295
State —        
Current(16)  12
 10
 38
Deferred27
  
 18
 17
 11
  12
 28
 55
Total$76
  $87
 $213
 $350
Net cash payments (refunds) for income taxes for the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014 were $23 million, $(100) million, $(26) million, and $422 million, respectively.
The tax effects of temporary differences between the carrying amounts of assets and liabilities in the financial statements and their respective tax bases, which give rise to deferred tax assets and liabilities, are as follows:
 Successor  Predecessor
 2016  2015
 (in millions)  (in millions)
Deferred tax liabilities —    
Accelerated depreciation$1,954
  $1,820
Property basis differences311
  283
Regulatory assets associated with employee benefit obligations125
  44
Other164
  215
Total2,554
  2,362
Deferred tax assets —    
Federal net operating loss59
  
Federal effect of state deferred taxes42
  62
Employee benefit obligations165
  164
Other332
  212
Total598
  438
Less valuation allowances(19)  (19)
Total, net of valuation allowances579
  419
Accumulated deferred income taxes, net$1,975
  $1,943
In November 2015, the FASB issued ASU 2015-17, which simplifies the presentation of deferred income taxes. See Note 1 under "Recently Issued Accounting Standards" for additional information.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


At December 31, 2016, the tax-related regulatory liabilities to be credited to customers were $22 million. These liabilities are primarily attributable to unamortized ITCs.
Deferred federal and state ITCs are amortized over the average life of the related property with such amortization normally applied as a credit to reduce depreciation in the statements of income. Credits amortized in this manner amounted to $1 million for the successor period of July 1, 2016 through December 31, 2016 and, for the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, were $1 million, $2 million, and $2 million, respectively. At December 31, 2016, all ITCs available to reduce federal income taxes payable had been utilized.
Effective Tax Rate
A reconciliation of the federal statutory income tax rate to the effective income tax rate is as follows:
 Successor  Predecessor
 July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
 2016  2016 2015 2014
Federal statutory rate35.0%  35.0% 35.0% 35.0%
State income tax, net of federal
deduction
4.0  3.5 3.4 3.8
Other1.0  (0.9) (2.0) (1.2)
Effective income tax rate40.0%  37.6% 36.4% 37.6%
The Company's effective tax rates for the successor period of July 1, 2016 through December 31, 2016 and the predecessor period of January 1, 2016 through June 30, 2016 were impacted by certain nondeductible Merger-related expenses. The effective tax rate for the successor period of July 1, 2016 through December 31, 2016 was also impacted by certain nondeductible expenses associated with change-in-control compensation charges.
On March 30, 2016, the FASB issued ASU 2016-09, which changes the accounting for income taxes for share-based payment award transactions. Entities are required to recognize all excess tax benefits and deficiencies related to the exercise or vesting of stock compensation as income tax expense or benefit in the income statement. The adoption of ASU 2016-09 did not have a material impact on the Company's overall effective tax rates. See Note 1 under "Recently Issued Accounting Standards" for additional information.
Unrecognized Tax Benefits
The Company has no unrecognized tax benefits for any period presented. The Company classifies interest on tax uncertainties as interest expense; however, the Company had no accrued interest or penalties for unrecognized tax benefits for any period presented.
It is reasonably possible that the amount of the unrecognized tax benefits could change within 12 months. The settlement of federal and state audits could impact the balances. At this time, an estimate of the range of reasonably possible outcomes cannot be determined.
On July 1, 2016, the Company became a wholly-owned subsidiary of Southern Company, which is a participant in the Compliance Assurance Process of the IRS. The audits for the Company by the IRS or any state have either concluded, or the statute of limitations has expired with respect to income tax examinations, for years prior to 2012.
6. FINANCING
Southern Company Gas' 100%-owned subsidiary, Southern Company Gas Capital, was established to provide for certain of Southern Company Gas' ongoing financing needs through a commercial paper program, the issuance of various debt, hybrid securities, and other financing arrangements. Southern Company Gas fully and unconditionally guarantees all debt issued by Southern Company Gas Capital and the gas facility revenue bonds issued by Pivotal Utility Holdings. Nicor Gas is not permitted by regulation to make loans to affiliates or utilize Southern Company Gas Capital for its financing needs.
Securities Due Within One Year
The current portion of long-term debt at December 31, 2016 is composed of the portion of its long-term debt due within the next 12 months. At December 31, 2016, the Company had $22 million of medium-term notes due within one year, consisting of

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


medium-term notes of Atlanta Gas Light. At December 31, 2015, the Company had $545 million of first mortgage bonds and senior notes due within one year.
Certain of the Company's senior notes with a principal amount of $275 million were subject to change-in-control provisions that were triggered by the Merger. Under the applicable note purchase agreement, Southern Company Gas Capital was required to provide notice to the holders of these notes of the change in control and offer to prepay these notes in August 2016. None of the holders of these notes accepted the offer for prepayment. These senior notes remained on their original payment schedules and included $120 million aggregate principal amount of Series A Floating Rate notes that were repaid at maturity on October 27, 2016 and $155 million aggregate principal amount of 3.50% Senior Notes due October 27, 2018.
Long-Term Debt
Long-term debt of the Company at December 31, 2016 and 2015 consisted of Series A, Series B, and Series C medium-term notes of Atlanta Gas Light; senior notes of Southern Company Gas Capital; first mortgage bonds of Nicor Gas; and gas facility revenue bonds of Pivotal Utility Holdings. Southern Company Gas fully and unconditionally guarantees all of Southern Company Gas Capital's senior notes and Pivotal Utility Holdings' gas facility revenue bonds. Additionally, substantially all of Nicor Gas' properties are subject to the lien of the indenture securing its first mortgage bonds. The majority of the long-term debt matures after fiscal year 2021.
The amount of medium-term notes outstanding at December 31, 2016 and December 31, 2015 was $159 million and $181 million, respectively.
Maturities through 2021 applicable to total long-term debt are as follows: $22 million in 2017; $155 million in 2018; $350 million in 2019; $330 million in 2021; and thereafter $3.9 billion. There are no material scheduled maturities in 2020.
First Mortgage Bonds
The first mortgage bonds of Nicor Gas have been issued with maturities ranging from 2019 to 2038.
In February and May 2016, $75 million and $50 million, respectively, of Nicor Gas' first mortgage bonds matured and were repaid using the proceeds from commercial paper borrowings.
In June 2016, Nicor Gas issued $250 million aggregate principal amount of first mortgage bonds with the following terms: $100 million at 2.66% due June 20, 2026, $100 million at 2.91% due June 20, 2031, and $50 million at 3.27% due June 20, 2036. The proceeds were used to repay short-term indebtedness incurred under the Nicor Gas commercial paper program and for other working capital needs. The amount of first mortgage bonds outstanding at December 31, 2016 and December 31, 2015 was $625 million and $375 million, respectively.
Gas Facility Revenue Bonds
Pivotal Utility Holdings is party to a series of loan agreements with the New Jersey Economic Development Authority and Brevard County, Florida under which five series of gas facility revenue bonds have been issued with maturities ranging from 2022 to 2033. These revenue bonds are issued by state agencies or counties to investors, and proceeds from each issuance then are loaned to Pivotal Utility Holdings. The amount of gas facility revenue bonds outstanding at December 31, 2016 and December 31, 2015 was $200 million.
Senior Notes
In May 2016, Southern Company Gas Capital issued $350 million aggregate principal amount of 3.25% Senior Notes due June 15, 2026, which are guaranteed by Southern Company Gas. The proceeds were used to repay at maturity $300 million aggregate principal amount of 6.375% Senior Notes due July 15, 2016 and for general corporate purposes.
In September 2016, Southern Company Gas Capital issued $350 million aggregate principal amount of 2.45% Senior Notes due October 1, 2023 and $550 million aggregate principal amount of 3.95% Senior Notes due October 1, 2046, both of which are guaranteed by Southern Company Gas. The proceeds were used to repay a $360 million promissory note issued to Southern Company for the purpose of funding a portion of the purchase price for a 50% equity interest in SNG, to fund the purchase of Piedmont's interest in SouthStar, to make a voluntary contribution to the pension plan, to repay at maturity $120 million aggregate principal amount of Series A Floating Rate Senior Notes due October 27, 2016, and for general corporate purposes. The amount of senior notes outstanding at December 31, 2016 and December 31, 2015 was $3.7 billion and $2.5 billion, respectively.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Dividend Restrictions
By regulation, Nicor Gas is restricted, to the extent of its retained earnings balance, in the amount it can dividend or loan to affiliates and is not permitted to make money pool loans to affiliates. Elizabethtown Gas is restricted by its dividend policy as established by the New Jersey BPU in the amount it can dividend to its parent company to the extent of 70% of its quarterly net income. Additionally, as stipulated in the New Jersey BPU's order approving the Merger, Southern Company Gas is prohibited from paying dividends to its parent company, Southern Company, if Southern Company Gas' senior unsecured debt rating falls below investment grade. As of December 31, 2016, the amount of subsidiary retained earnings restricted for dividend payment totaled $688 million.
Bank Credit Arrangements
Credit Facilities
Bank credit arrangements under the Southern Company Gas Credit Facility and the Nicor Gas Credit Facility provide liquidity support to Southern Company Gas Capital's and Nicor Gas' commercial paper borrowings. The Nicor Gas Credit Facility is restricted for working capital needs of Nicor Gas. In October 2015, the Company entered into agreements to amend and extend the Southern Company Gas Credit Facility and the Nicor Gas Credit Facility. Under the terms of these agreements, the Company extended the maturity dates of the Southern Company Gas Credit Facility and the Nicor Gas Credit Facility to November 9, 2018 and December 14, 2018, respectively. One of the banks elected not to participate in this extension and its total commitment of $75 million will continue through the fourth quarter 2017. The Company also modified the credit facilities to provide for the limited consent by the lenders to the Merger with Southern Company. Additionally, the Company made similar changes to its Bank Rate Mode Covenants Agreement relating to the Pivotal Utility Holdings gas facility revenue bonds.
At December 31, 2016, committed credit arrangements with banks were as follows:
Successor
  Expires     Expires Within One Year
Company 2017 2018 Total Unused Term Out No Term Out
  (in millions) (in millions) (in millions)
Southern Company Gas Capital $49
 $1,251
 $1,300
 $1,249
 $
 $49
Nicor Gas 26
 674
 700
 700
 
 26
Total $75
 $1,925
 $2,000
 $1,949
 $
 $75
The Southern Company Gas Credit Facility and the Nicor Gas Credit Facility included in the table above each contain a covenant that limits the ratio of debt to capitalization (as defined in each Facility) to a maximum of 70% and contain cross acceleration provisions to other indebtedness (including guarantee obligations) of the applicable company. At December 31, 2016, the Company and Nicor Gas were in compliance with their respective debt limit covenants.
Commercial Paper Programs
The Company maintains commercial paper programs at Southern Company Gas Capital and at Nicor Gas that consist of short-term, unsecured promissory notes. Nicor Gas' commercial paper program supports working capital needs at Nicor Gas as Nicor Gas is not permitted to make money pool loans to affiliates. All of the Company's other subsidiaries benefit from Southern Company Gas Capital's commercial paper program. Commercial paper is included in notes payable in the consolidated balance sheets.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


Details of commercial paper borrowings outstanding were as follows:
 Commercial Paper at the End of the Period
 
Amount
Outstanding
 
Weighted Average
Interest Rate
 (in millions)  
Successor – December 31, 2016:   
Southern Company Gas Capital$733
 1.09%
Nicor Gas524
 0.95%
Total$1,257
 1.03%
    
Predecessor – December 31, 2015:   
Southern Company Gas Capital$471
 0.71%
Nicor Gas539
 0.52%
Total$1,010
 0.60%
7. COMMITMENTS
Pipeline Charges, Storage Capacity, and Gas Supply
Pipeline charges, storage capacity, and gas supply include charges recoverable through a natural gas cost recovery mechanism, or alternatively, billed to Marketers and demand charges associated with Sequent. The gas supply balance includes amounts for Nicor Gas' and SouthStar's gas commodity purchase commitments of 33 million mmBtu at floating gas prices calculated using forward natural gas prices at December 31, 2016 and valued at $106 million. The Company provides guarantees to certain gas suppliers for certain of its subsidiaries in support of payment obligations.
Expected future contractual obligations for pipeline charges, storage capacity, and gas supply that are not recognized on the balance sheets as of December 31, 2016 were as follows:
 Pipeline Charges, Storage Capacity, and Gas Supply
 (in millions)
2017$822
2018602
2019447
2020394
2021352
2022 and thereafter2,591
Total$5,208
Operating Leases
The Company has operating lease agreements with various terms and expiration dates primarily for real estate. Total rent expense was $8 million, $6 million, $12 million, and $13 million for the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, respectively. The Company includes any step rents, escalations, and lease concessions in its computation of minimum lease payments, which are recognized on a straight-line basis over the minimum lease terms.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


As of December 31, 2016, the Company's estimated minimum lease payments under operating leases were as follows:
 Minimum Lease Payments
 (in millions)
2017$18
201817
201916
202015
202115
2022 and thereafter38
Total$119
Financial Guarantees
AGL Equipment Leasing Inc. (AEL), a wholly-owned subsidiary of the Company, holds the Company's interest in Triton and has an obligation to restore to zero any deficit in its equity account for income tax purposes in the unlikely event that Triton is liquidated and a deficit balance remains. This obligation was not impacted by the 2014 sale of Tropical Shipping and continues for the life of the Triton partnerships. Any payment is effectively limited to the net assets of AEL, which was less than $1 million at December 31, 2016. The Company believes the likelihood of any such payment by AEL is remote and, as such, no liability has been recorded for this obligation at December 31, 2016.
Indemnities
In certain instances, the Company has undertaken to indemnify current property owners and others against costs associated with the effects and/or remediation of contaminated sites for which it may be responsible under applicable federal or state environmental laws, generally with no limitation as to the amount. These indemnifications relate primarily to ongoing coal tar cleanup. See Note 3 under "Environmental Matters" for additional information regarding these matters. The Company believes that the likelihood of payment under its other environmental indemnifications is remote. No liability has been recorded for such indemnifications as the fair value was inconsequential at inception.
8.12. STOCK COMPENSATION
Stock-Based Compensation
Successor
AtStock-based compensation primarily in the effective time of the Merger, each shareform of Southern Company Gas common stock, other than certain excluded shares, was converted into the right to receive $66 in cash, without interest. Also at the effective time of the Merger:
Southern Company Gas' outstandingperformance share units (PSU) and restricted stock units restricted stock awards, and non-employee director stock awards were deemed fully vested and were canceled and converted into(RSU) may be granted through the rightOmnibus Incentive Compensation Plan to receive an amount in cash equal to the product of (i) the total number of shares of Southern Company Gas' common stock subjectsystem employees ranging from line management to such award and (ii) the Merger consideration of $66 per share;
executives. Southern Company Gas' outstanding stock options, all of which were fully vested, were canceledGas and converted intoSouthern Power had no employee participants in the right to receive an amount in cash equal to the product of (i) the total number of shares of Southern Company Gas' common stock subject to such optionsstock-based compensation plans until 2017 and (ii) the excess of the Merger consideration of $66 per share over the applicable exercise price per share of such options; and
each outstanding award of a performance share unit was converted into an award of Southern Company's restricted stock units (RSUs).
2018, respectively. In conjunction with the Merger, stock-based compensation in the form of Southern Company restricted stockRSUs and performance share units,PSUs was granted to certain executives of theSouthern Company Gas through the Southern Company Omnibus Incentive Compensation Plan.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2019, the number of current and former employees participating in stock-based compensation programs for the Registrants was as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi PowerSouthern PowerSouthern Company Gas
Number of employees2,320
307
370
89
50
285

The majority of PSUs and RSUs awarded contain terms where employees become immediately vested in PSUs and RSUs upon retirement. As a result, compensation expense for employees that are retirement eligible at the grant date is recognized immediately, while compensation expense for employees that become retirement eligible during the vesting period is recognized over the period from grant date to the date of retirement eligibility. In addition, the Registrants recognize forfeitures as they occur.
All unvested PSUs and RSUs vest immediately upon a change in control where Southern Company is not the surviving corporation.
Performance Share Units
PSUs granted to employees vest at the end of a three-year performance period. Shares of Southern Company common stock are delivered to employees at the end of the performance period with the number of shares issued ranging from 0% to 200% of the target number of PSUs granted, based on achievement of the performance goals established by the Compensation Committee of the Southern Company Board of Directors.
Southern Company has issued 3 types of PSUs, each with a unique performance goal. These types of PSUs include total shareholder return (TSR) awards based on the TSR for Southern Company common stock during the three-year performance period as compared to a group of industry peers; ROE awards based on Southern Company's equity-weighted return over the performance period; and EPS awards based on Southern Company's cumulative EPS over the performance period. EPS awards were last granted in 2017.
The fair value of TSR awards is determined as of the grant date using a Monte Carlo simulation model to estimate the TSR of Southern Company's common stock among industry peers over the performance period. In determining the fair value of the TSR awards issued to employees, the expected volatility is based on the historical volatility of Southern Company's stock over a period equal to the performance period. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant that covers the performance period of the awards. The following table shows the assumptions used in the pricing model and the weighted average grant-date fair value of TSR awards granted:
Year Ended December 312019 2018 2017
Expected volatility15.6% 14.9% 15.6%
Expected term (in years)
3 3 3
Interest rate2.4% 2.4% 1.4%
Weighted average grant-date fair value$62.71 $43.75 $49.08

The Registrants recognize TSR award compensation expense on a straight-line basis over the three-year performance period without remeasurement.
The fair values of EPS awards and ROE awards are based on the closing stock price of Southern Company common stock on the date of the grant. The weighted average grant-date fair value of the awards granted during 2019, 2018, and 2017 was $49.38, $43.49, and $49.21, respectively. Compensation expense for EPS and ROE awards is generally recognized ratably over the three-year performance period adjusted for expected changes in EPS and ROE performance. Total compensation cost recognized for vested EPS awards and ROE awards reflects final performance metrics.
Southern Company had 2.5 million unvested PSUs outstanding at December 31, 2018. In February 2019, the PSUs that vested for the three-year performance period ended December 31, 2018 were converted into 1.7 million shares outstanding at a share price of $49.24.
During 2019, Southern Company granted 1.2 million PSUs and 1.2 million PSUs were vested or forfeited, resulting in 2.5 million unvested PSUs outstanding at December 31, 2019. In February 2020, the PSUs that vested for the three-year performance period ended December 31, 2019 were converted into 1.8 million shares outstanding at a share price of $68.59.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Total PSU compensation cost, and the related tax benefit recognized in income, for the years ended December 31, 2019, 2018, and 2017 are as follows:
 2019 2018 2017
 (in millions)
Southern Company     
Compensation cost recognized in income$77
 $91
 $74
Tax benefit of compensation cost recognized in income20
 24
 29
Southern Company Gas     
Compensation cost recognized in income$14
 $11
 $8
Tax benefit of compensation cost recognized in income4
 3
 3

Total PSU compensation cost and the related tax benefit recognized in income were immaterial for all periods presented for Alabama Power, Georgia Power, Mississippi Power, and Southern Power. The compensation cost related to the grant of Southern Company PSUs to the employees of each Subsidiary Registrant is recognized in each Subsidiary Registrant's financial statements with a corresponding credit to equity representing a capital contribution from Southern Company.
At December 31, 2019, Southern Company's total unrecognized compensation cost related to PSUs was $31 million and is expected to be recognized over a weighted-average period of approximately 12 months. The total unrecognized compensation cost related to PSUs as of December 31, 2019 was immaterial for all other Registrants.
Restricted Stock Units
The fair value of RSUs is based on the closing stock price of Southern Company common stock on the date of the grant. The weighted average grant-date fair values of RSUs granted during 2019, 2018, and 2017 were $50.44, $43.81, and $49.25, respectively. For most RSU awards, one-third of the RSUs vest each year throughout a three-year service period and compensation cost for RSUs is generally recognized over the corresponding one-, two-, or three-year vesting period. Shares of Southern Company common stock are delivered to employees at the end of each vesting period.
Southern Company had 1.1 million RSUs outstanding at December 31, 2018. During 2019, Southern Company granted 0.6 million RSUs and 0.4 million RSUs were vested or forfeited, resulting in 1.3 million unvested RSUs outstanding at December 31, 2019, including RSUs related to employee retention agreements.
For the years ended December 31, 2019, 2018, and 2017, Southern Company's total compensation cost for RSUs recognized in income was $28 million, $27 million, and $25 million, respectively. The related tax benefit also recognized in income was $7 million, $7 million, and $10 million for the years ended December 31, 2019, 2018, and 2017, respectively. Total unrecognized compensation cost related to RSUs as of December 31, 2019 for Southern Company of $14 million will be recognized over a weighted-average period of approximately 10 months.
Total RSUs outstanding and total compensation cost and related tax benefit for the RSUs recognized in income for the years ended December 31, 2019, 2018, and 2017, as well as the total unrecognized compensation cost as of December 31, 2019, were immaterial for all other Registrants. The compensation cost related to the grant of Southern Company RSUs to the employees of each Subsidiary Registrant is recognized in such Subsidiary Registrant's financial statements with a corresponding credit to equity representing a capital contribution from Southern Company.
Stock Options
In 2015, Southern Company discontinued granting stock options. Stock options expire no later than 10 years after the grant date and the latest possible exercise will occur by November 2024. As of December 31, 2019, the weighted average remaining contractual term for the options outstanding and exercisable was approximately three years.
As of December 31, 2017, all stock option awards are vested and compensation cost fully recognized. Total compensation cost for stock option awards and the related tax benefits recognized in income for the year ended December 31, 2017 were immaterial for Southern Company, Alabama Power, Georgia Power, and Mississippi Power.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company's activity in the stock option program for 2019 is summarized below:
 Shares Subject to Option Weighted Average Exercise Price
 (in millions)  
Outstanding at December 31, 201817.5
 $41.92
Exercised11.6
 41.62
Outstanding and Exercisable at December 31, 20195.9
 $42.52

Southern Company's cash receipts from issuances related to stock options exercised under the share-based payment arrangements for the years ended December 31, 2019, 2018, and 2017 were $482 million, $41 million, and $239 million, respectively.
At December 31, 2019, the aggregate intrinsic value for the options outstanding and exercisable was as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi Power
 (in millions)
Total intrinsic value for outstanding and exercisable options$124
$14
$35
$6

Total intrinsic value of options exercised, and the related tax benefit, for the years ended December 31, 2019, 2018, and 2017 are presented below:
Year Ended December 312019 2018 2017
 (in millions)
Southern Company     
Intrinsic value of options exercised$167
 $9
 $64
Tax benefit of options exercised35
 2
 25
Alabama Power     
Intrinsic value of options exercised$21
 $2
 $12
Tax benefit of options exercised4
 
 5
Georgia Power     
Intrinsic value of options exercised$30
 $2
 $13
Tax benefit of options exercised6
 
 5
Mississippi Power     
Intrinsic value of options exercised$4
 $1
 $2
Tax benefit of options exercised1
 
 1

Total intrinsic value of options exercised, and the related tax benefit recognized in income, for the years ended December 31, 2019 and 2018 was immaterial for Southern Power and Southern Company Gas.
Merger Stock Compensation
Southern Company Restricted Stock AwardsUnits
Under the terms of the RSU awards, the employees received a specified number of RSUs that vest when the employees have satisfied the requisite service period(s) at which time the employee receives Southern Company common stock. The terms of the

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


award require the employee to be continuously employed through the original three-year vesting schedule of the award being replaced.
For the successor period ended December 31, 2016, employees of the Company were granted 742,461 RSUs. The grant-date fair value of the RSUs granted was $53.83,is based on the closing stock price of Southern Company common stock on the date of the grant. As a portionThe weighted average grant-date fair values of RSUs granted during 2019, 2018, and 2017 were $50.44, $43.81, and $49.25, respectively. For most RSU awards, one-third of the fair valueRSUs vest each year throughout a three-year service period and compensation cost for RSUs is generally recognized over the corresponding one-, two-, or three-year vesting period. Shares of Southern Company common stock are delivered to employees at the awardend of each vesting period.
Southern Company had 1.1 million RSUs outstanding at December 31, 2018. During 2019, Southern Company granted 0.6 million RSUs and 0.4 million RSUs were vested or forfeited, resulting in 1.3 million unvested RSUs outstanding at December 31, 2019, including RSUs related to pre-combination service,employee retention agreements.
For the grant date fair value was allocated to pre- or post-combination serviceyears ended December 31, 2019, 2018, and accounted for as Merger consideration or2017, Southern Company's total compensation cost for RSUs recognized in income was $28 million, $27 million, and $25 million, respectively. Approximately $13The related tax benefit also recognized in income was $7 million, $7 million, and $10 million for the years ended December 31, 2019, 2018, and 2017, respectively. Total unrecognized compensation cost related to RSUs as of the grant date fair value was allocated to Merger consideration. The remaining fair valueDecember 31, 2019 for Southern Company of $12$14 million will be recognized over a weighted-average period of approximately 10 months.
Total RSUs outstanding and total compensation cost and related tax benefit for the RSUs recognized in income for the years ended December 31, 2019, 2018, and 2017, as well as the total unrecognized compensation expense on a straight-line basis over the remaining vesting period.
cost as of December 31, 2019, were immaterial for all other Registrants. The compensation cost related to the grant of Southern Company RSUs to the Company's employees areof each Subsidiary Registrant is recognized in the Company'ssuch Subsidiary Registrant's financial statements with a corresponding credit to equity representing a capital contribution from Southern Company. For
Stock Options
In 2015, Southern Company discontinued granting stock options. Stock options expire no later than 10 years after the successor periodgrant date and the latest possible exercise will occur by November 2024. As of July 1, 2016 through December 31, 2016, total2019, the weighted average remaining contractual term for the options outstanding and exercisable was approximately three years.
As of December 31, 2017, all stock option awards are vested and compensation cost fully recognized. Total compensation cost for RSUsstock option awards and the related tax benefits recognized in income for the year ended December 31, 2017 were immaterial for Southern Company, Alabama Power, Georgia Power, and Mississippi Power.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Southern Company's activity in the stock option program for 2019 is summarized below:
 Shares Subject to Option Weighted Average Exercise Price
 (in millions)  
Outstanding at December 31, 201817.5
 $41.92
Exercised11.6
 41.62
Outstanding and Exercisable at December 31, 20195.9
 $42.52

Southern Company's cash receipts from issuances related to stock options exercised under the share-based payment arrangements for the years ended December 31, 2019, 2018, and 2017 were $482 million, $41 million, and $239 million, respectively.
At December 31, 2019, the aggregate intrinsic value for the options outstanding and exercisable was $13 million, withas follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi Power
 (in millions)
Total intrinsic value for outstanding and exercisable options$124
$14
$35
$6

Total intrinsic value of options exercised, and the related tax benefit, also recognized in income of $4 million. As offor the years ended December 31, 2016, $12 million of total unrecognized compensation cost related to RSUs will be recognized over a weighted-average period of approximately 20 months. See "Performance Share Unit Awards" herein for additional information.2019, 2018, and 2017 are presented below:
Change in Control Awards
Year Ended December 312019 2018 2017
 (in millions)
Southern Company     
Intrinsic value of options exercised$167
 $9
 $64
Tax benefit of options exercised35
 2
 25
Alabama Power     
Intrinsic value of options exercised$21
 $2
 $12
Tax benefit of options exercised4
 
 5
Georgia Power     
Intrinsic value of options exercised$30
 $2
 $13
Tax benefit of options exercised6
 
 5
Mississippi Power     
Intrinsic value of options exercised$4
 $1
 $2
Tax benefit of options exercised1
 
 1

Southern Company awarded performance share units to certain employees remaining with the Company in lieu of certain change in control benefits the employee was entitled to receive following the Merger (change-in-control awards). Shares of Southern Company common stock and/or cash equal to the dollarTotal intrinsic value of the change-in-control benefit will vestoptions exercised, and be issued one-third each year as long as the employee remains in service with the Company, or any of its affiliates, at each vest date. In addition to the change-in-control benefit, Southern Company common stock could be issued to the employees at the end of a performance period with the number of shares issued ranging from 0% to 100% of the target number of performance share units granted, based on achievement of certain Southern Company common stock price metrics, as well as performance goals established by the Compensation Committee of the Southern Company Board of Directors (achievement shares).
The change-in-control benefits are accounted for as a liability award with the fair value equal to the guaranteed dollar value of the change-in-control benefit. The grant-date fair value of the achievement portion of the award was determined using a Monte Carlo simulation model to estimate the number of achievement shares expected to vest based on the Southern Company common stock price. The expected payout is reevaluated annually with expense recognized to date increased or decreased proportionately based on the expected performance. The compensation expense ultimately recognized for the achievement shares will be based on the actual performance.
For the successor period July 1, 2016 through December 31, 2016, total compensation cost for the change-in-control awards recognized in income was $4 million, with less than $1 million related tax benefit recognized in income. The compensation cost related to the grant of Southern Company change-in-control benefit and achievement shares to the Company's employees are recognized in the Company's financial statements with a corresponding credit to a liability or equity, representing a capital contribution from Southern Company, respectively. As of December 31, 2016, $20 million of total unrecognized compensation cost related to change in control awards will be recognized over a weighted-average period of approximately 23 months.
Predecessor
For the predecessor periods of January 1, 2016 through June 30, 2016 andincome, for the years ended December 31, 20152019 and 2014, the employees of Southern Company Gas and subsidiaries participated in the AGL Resources Inc. Omnibus Performance Incentive Plan, as amended and restated.
The AGL Resources Inc. Omnibus Performance Incentive Plan, as amended and restated, and the Long-Term Incentive Plan (1999) provided for the grant of incentive and nonqualified stock options, stock appreciation rights, shares of restricted stock, restricted stock units, performance cash awards, and other stock-based awards to officers and key employees. Under the AGL Resources Inc. Omnibus Performance Incentive Plan, as of December 31, 2015, the number of shares that were issuable upon exercise of outstanding stock options, warrants, and rights was 359,586 shares. Under the Long-Term Incentive Plan (1999), as of December 31, 2015, the number of shares that were issuable upon exercise of outstanding stock options, warrants, and rights was 80,600 shares. The maximum number of shares that were available for future issuance under the AGL Resources Inc. Omnibus Performance Incentive Plan was 3,513,992 shares, which included 1,514,116 shares previously available under the Nicor Inc. 2006 Long-Term Incentive Plan, as amended, pursuant to New York Stock Exchange rules. Effective July 1, 2016, all Southern Company Gas shares of stock were canceled and/or converted as a result of the Merger. No further grants will be made from the Long-Term Incentive Plan (1999) or the AGL Resources Inc. Omnibus Performance Incentive Plan, as amended and restated.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


For the predecessor periods, the Company recognized stock-based compensation expense for its stock-based awards over the requisite service period based on the estimated fair value at the date of grant for its stock-based awards using the modified prospective method. These stock awards included: stock options, stock and restricted stock awards, and performance units (restricted stock units, performance share units, and performance cash units).
Performance-based stock awards and performance units contained market and performance conditions. Stock options, restricted stock awards, and performance units also contained a service condition. The Company estimated forfeitures over the requisite service period when recognizing compensation expense. These estimates were adjusted to the extent that actual forfeitures differ, or were expected to materially differ, from such estimates. Excess tax benefits were reported as a financing cash inflow. The difference between the proceeds from the exercise of the Company's stock-based awards and the par value of the stock was recorded within additional paid-in capital.
Southern Company Gas granted stock awards with a grant price that was equal to the fair market value on the date of the grant. Fair market value was defined under the terms of the applicable plans as the closing price per share of Southern Company Gas' common stock on the grant date. For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 2015 and 2014, total compensation cost for cash and stock-based awards recognized in income was $24 million, $40 million, and $24 million, respectively, with related tax benefits also recognized in income, which were immaterial.
Incentive and Nonqualified Stock Options
The stock options that the Company granted prior to the Merger had a three-year vesting period and expired ten years after the date of grant. The exercise price for stock options granted equaled the stock price of Southern Company Gas common stock on the date of grant. Participants realized value from option grants only to the extent that the fair market value of the Company's common stock on the date of exercise of the option exceeded the fair market value of the common stock on the date of the grant. No stock options have been issued under the plan since 2009.
The Company used shares purchased under its 2006 share repurchase program to satisfy exercises to the extent that repurchased shares were available. Otherwise, the Company issued new shares from its authorized common stock.
The Company measured compensation cost related to stock options based on the fair value of these awards at their date of grant using the Black-Scholes option-pricing model. For the predecessor period ended December 31, 2015, the Company had no unrecognized compensation costs related to stock options. Cash received from stock option exercises for the predecessor periods ended June 30, 2016 and December 31, 2015 were less than $1 million and $5 million, respectively, and the income tax benefit from stock option exercises2018 was immaterial for both periods.
For the predecessor periods of January 1, 2016 through June 30, 2016Southern Power and the years ended December 31, 2015 and 2014, the total intrinsic value of options exercised was $3 million, $13 million, and $4 million, respectively.
Effective July 1, 2016, all of the Company's outstanding stock options, all of which were fully vested, were canceled and converted into the right to receive an amount in cash equal to the product of (i) the total number of shares of Southern Company Gas' common stock subject to such options and (ii) the excess of the Gas.
Merger consideration of $66 per share over the applicable exercise price per share of such options.Stock Compensation
Restricted Stock Units
A restrictedThe fair value of RSUs is based on the closing stock unit was an award that representedprice of Southern Company common stock on the opportunity to receive a specified number of sharesdate of the Company'sgrant. The weighted average grant-date fair values of RSUs granted during 2019, 2018, and 2017 were $50.44, $43.81, and $49.25, respectively. For most RSU awards, one-third of the RSUs vest each year throughout a three-year service period and compensation cost for RSUs is generally recognized over the corresponding one-, two-, or three-year vesting period. Shares of Southern Company common stock subjectare delivered to employees at the achievementend of certain pre-established performance criteria. each vesting period.
Southern Company had 1.1 million RSUs outstanding at December 31, 2018. During 2019, Southern Company granted 0.6 million RSUs and 0.4 million RSUs were vested or forfeited, resulting in 1.3 million unvested RSUs outstanding at December 31, 2019, including RSUs related to employee retention agreements.
For the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 20152019, 2018, and 2014, the Company granted 25,166, 47,546,2017, Southern Company's total compensation cost for RSUs recognized in income was $28 million, $27 million, and 44,272, respectively, of restricted stock units (including dividends) to certain employees. At the effective time of the Merger, all 65,042 restricted stock units outstanding were deemed fully vested$25 million, respectively. The related tax benefit also recognized in income was $7 million, $7 million, and were canceled and converted into the right to receive an amount in cash equal to the product of (i) the total number of shares of Southern Company Gas' common stock subject to such award and (ii) the Merger consideration of $66 per share.
Performance Share Unit Awards
A performance share unit award represented the opportunity to receive cash and shares subject to the achievement of certain pre-established performance criteria. For the predecessor periods of January 1, 2016 through June 30, 2016 and$10 million for the years ended December 31, 20152019, 2018, and 2014,2017, respectively. Total unrecognized compensation cost related to RSUs as of December 31, 2019 for Southern Company of $14 million will be recognized over a weighted-average period of approximately 10 months.
Total RSUs outstanding and total compensation cost and related tax benefit for the Company granted performance share unit awards to certain officers.RSUs recognized in income for the years ended December 31, 2019, 2018, and 2017, as well as the total unrecognized compensation cost as of December 31, 2019, were immaterial for all other Registrants. The Company's 2016 and 2015 performance share units had two performance measures. One measure, which accounted for 75%,compensation cost related to the Company's total shareholder return relative to a groupgrant of peer companies. The second measure, which accounted for 25%, relatedSouthern Company RSUs to the Company's earnings per share, excluding wholesale gas services, overemployees of each Subsidiary Registrant is recognized in such Subsidiary Registrant's financial statements with a corresponding credit to equity representing a capital contribution from Southern Company.
Stock Options
In 2015, Southern Company discontinued granting stock options. Stock options expire no later than 10 years after the three-year performance period. The 2014 performance share unitsgrant date and the latest possible exercise will occur by November 2024. As of December 31, 2019, the weighted average remaining contractual term for the options outstanding and exercisable was approximately three years.
As of December 31, 2017, all stock option awards are vested and compensation cost fully recognized. Total compensation cost for stock option awards and the related tax benefits recognized in income for the year ended December 31, 2017 were measured entirely based on the Company's total shareholder return relative to a group of peer companies.immaterial for Southern Company, Alabama Power, Georgia Power, and Mississippi Power.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



Southern Company's activity in the stock option program for 2019 is summarized below:
 Shares Subject to Option Weighted Average Exercise Price
 (in millions)  
Outstanding at December 31, 201817.5
 $41.92
Exercised11.6
 41.62
Outstanding and Exercisable at December 31, 20195.9
 $42.52

Southern Company's cash receipts from issuances related to stock options exercised under the share-based payment arrangements for the years ended December 31, 2019, 2018, and 2017 were $482 million, $41 million, and $239 million, respectively.
At December 31, 2019, the aggregate intrinsic value for the options outstanding and exercisable was as follows:
 Southern CompanyAlabama PowerGeorgia PowerMississippi Power
 (in millions)
Total intrinsic value for outstanding and exercisable options$124
$14
$35
$6

Total intrinsic value of options exercised, and the related tax benefit, for the years ended December 31, 2019, 2018, and 2017 are presented below:
Year Ended December 312019 2018 2017
 (in millions)
Southern Company     
Intrinsic value of options exercised$167
 $9
 $64
Tax benefit of options exercised35
 2
 25
Alabama Power     
Intrinsic value of options exercised$21
 $2
 $12
Tax benefit of options exercised4
 
 5
Georgia Power     
Intrinsic value of options exercised$30
 $2
 $13
Tax benefit of options exercised6
 
 5
Mississippi Power     
Intrinsic value of options exercised$4
 $1
 $2
Tax benefit of options exercised1
 
 1

Total intrinsic value of options exercised, and the related tax benefit recognized in income, for the years ended December 31, 2019 and 2018 was immaterial for Southern Power and Southern Company Gas.
Merger Stock Compensation
Southern Company Restricted Stock Awards
At the effective time of the Merger, each outstanding performance share unitaward of existing Southern Company Gas PSUs was converted into an award of Southern Company'sCompany RSUs. Under the terms of the restricted stock units. The conversion ratio wasawards, the product of (i)employees received Southern Company stock when they satisfied the greater of (a) 125%requisite service period by being continuously employed through the original three-year vesting schedule of the numberaward being replaced. Southern Company issued 0.7 million RSUs with a grant-date fair value of units underlying such award based on target level achievement of all relevant performance goals and (b) the number of units underlying such award$53.83, based on the actual level of achievement of all relevant performance goals against target and (ii) an exchange ratio based on the Merger consideration of $66 per share as compared to the volume-weighted averageclosing stock price per share of Southern Company common stock. The resulting Southern Company restricted stock units will followon the vesting schedule and payment terms, and otherwise be issued on similar terms and conditions, as were applicable to such performance share unit awards, subject to certain exceptions. See "Southern Company Restricted Stock Awards" for additional information.
Stock and Restricted Stock Awards
The compensation costdate of both stock awards and restricted stock awards was equal tothe grant. Approximately $13 million of the grant date fair value, ofwhich was related to pre-combination service, was accounted for as Merger consideration. Southern Company Gas recognized the awards, recognizedremaining fair value as compensation expense on a straight-line basis over the requisite serviceremaining vesting period. No other assumptionsThe compensation cost related to the grant of RSUs to Southern Company Gas employees is recognized in Southern Company Gas' financial statements with a corresponding credit to equity, representing a capital contribution from Southern Company. As of

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

December 31, 2018, all RSUs were usedvested. For the years ended December 31, 2018 and 2017, total compensation cost for RSUs recognized in income and the related tax benefit were immaterial.
Southern Company Gas Change in Control Awards
Southern Company awarded PSUs to valuecertain Southern Company Gas employees who continued their employment with the awards. TheSouthern Company referredin lieu of certain change in control benefits the employee was entitled to restricted stock as an awardreceive following the Merger (change in control awards). Shares of Southern Company common stock subject to time-based vesting and/or achievement of performance measures. Prior to vesting, restricted stock awards were subject to certain transfer restrictions and forfeiture upon termination of employment.
Restricted Stock AwardsEmployees
Total unvested restricted stock awards outstanding as of December 31, 2015 were 398,832. During 2016, 303,618 restricted stock awards were granted, 699,960 restricted stock awards were vested, and 2,466 restricted stock awards were forfeited. At the effective time of the Merger, Southern Company Gas' outstanding restricted stock awards were deemed fully vested and were canceled and converted into the right to receive an amount in cash equal to the productdollar value of (i) the total numberchange in control benefit vested and were issued one-third each year as long as the employee remained in service with Southern Company or its subsidiaries at each vest date. In addition to the change in control benefit, Southern Company common stock was issued to the employees at the end of sharesa performance period based on achievement of certain Southern Company common stock price metrics, as well performance goals established by the Compensation Committee of the Southern Company Board of Directors (achievement shares).
The change in control benefits were accounted for as a liability award with the fair value equal to the guaranteed dollar value of the change in control benefit. The compensation cost of the change in control benefit was recognized in Southern Company Gas' financial statements with a corresponding credit to a liability. The grant-date fair value of the achievement portion of the award was determined using a Monte Carlo simulation model to estimate the number of achievement shares expected to vest based on the Southern Company common stock subjectprice. The compensation cost of the achievement shares was recognized in Southern Company Gas' financial statements with a corresponding credit to such awardequity, representing a capital contribution from Southern Company. The expected payout was reevaluated annually with expense recognized to date increased or decreased proportionately based on the expected performance. The compensation cost ultimately recognized for the achievement shares was based on the actual performance. As of December 31, 2019, all change in control awards are vested. For the year ended December 31, 2017, total compensation cost and (ii) the Merger consideration of $66 per share.related tax benefit for the change in control awards recognized in income was $12 million and $6 million, respectively. Total compensation cost and the related tax benefit for the change in control awards recognized in income were immaterial for all other periods presented.
9.13. FAIR VALUE MEASUREMENTS
Fair value measurements are based on inputs of observable and unobservable market data that a market participant would use in pricing the asset or liability. The use of observable inputs is maximized where available and the use of unobservable inputs is minimized for fair value measurement and reflects a three-tier fair value hierarchy that prioritizes inputs to valuation techniques used for fair value measurement. See Note
Level 1 consists of observable market data in an active market for additionalidentical assets or liabilities.
Level 2 consists of observable market data, other than that included in Level 1, that is either directly or indirectly observable.
Level 3 consists of unobservable market data. The input may reflect the assumptions of each Registrant of what a market participant would use in pricing an asset or liability. If there is little available market data, then each Registrant's own assumptions are the best available information.
AsIn the case of multiple inputs being used in a fair value measurement, the lowest level input that is significant to the fair value measurement represents the level in the fair value hierarchy in which the fair value measurement is reported.
Net asset value as a practical expedient is the classification used for assets that do not have readily determinative fair values. Fund managers value the assets using various inputs and techniques depending on the nature of the underlying investments.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2016,2019, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
 
Fair Value Measurements Using(a)(b)
  
Successor – As of December 31, 2016
Quoted Prices in Active Markets for Identical Assets
(Level 1)
 Significant Other Observable Inputs
(Level 2)
 Significant Unobservable Inputs
(Level 3)
 Net Asset Value as a Practical Expedient (NAV) Total
 (in millions)
Assets:         
Energy-related derivatives$338
 $239
 $
 $
 $577
Liabilities:         
Energy-related derivatives$345
 $224
 $
 $
 $569
 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets  Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
At December 31, 2019:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Southern Company         
Assets:         
Energy-related derivatives(a)(b)
$388
 $267
 $22
 $
 $677
Interest rate derivatives
 2
 
 
 2
Foreign currency derivatives
 16
 
 
 16
Investments in trusts:(c)(d)
         
Domestic equity751
 135
 
 
 886
Foreign equity68
 220
 
 
 288
U.S. Treasury and government agency securities
 307
 
 
 307
Municipal bonds
 85
 
 
 85
Pooled funds – fixed income
 17
 
 
 17
Corporate bonds23
 297
 
 
 320
Mortgage and asset backed securities
 87
 
 
 87
Private equity
 
 
 56
 56
Cash and cash equivalents1
 
 
 
 1
Other17
 5
 
 
 22
Cash equivalents1,393
 2
 
 
 1,395
Other investments9
 21
 
 
 30
Total$2,650
 $1,461
 $22
 $56
 $4,189
Liabilities:         
Energy-related derivatives(a)(b)
$442
 $254
 $7
 $
 $703
Interest rate derivatives
 24
 
 
 24
Foreign currency derivatives
 24
 
 
 24
Contingent consideration
 
 19
 
 19
Total$442
 $302
 $26
 $
 $770
          

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets  Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
At December 31, 2019:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Alabama Power         
Assets:         
Energy-related derivatives$
 $4
 $
 $
 $4
Nuclear decommissioning trusts:(c)
         
Domestic equity488
 123
 
 
 611
Foreign equity68
 64
 
 
 132
U.S. Treasury and government agency securities
 21
 
 
 21
Municipal bonds
 1
 
 
 1
Corporate bonds23
 144
 
 
 167
Mortgage and asset backed securities
 29
 
 
 29
Private equity
 
 
 56
 56
Other3
 1
 
 
 4
Cash equivalents691
 2
 
 
 693
Other investments
 21
 
 
 21
Total$1,273
 $410
 $
 $56
 $1,739
Liabilities:         
Energy-related derivatives$
 $24
 $
 $
 $24
          
Georgia Power         
Assets:         
Energy-related derivatives$
 $4
 $
 $
 $4
Nuclear decommissioning trusts:(c)(d)
         
Domestic equity263
 1
 
 
 264
Foreign equity
 152
 
 
 152
U.S. Treasury and government agency securities
 286
 
 
 286
Municipal bonds
 84
 
 
 84
Corporate bonds
 153
 
 
 153
Mortgage and asset backed securities
 57
 
 
 57
Other13
 4
 
 
 17
Total$276
 $741
 $
 $
 $1,017
Liabilities:
 
 
 
 
Energy-related derivatives$
 $53
 $
 $
 $53
Interest rate derivatives
 17
 
 
 17
Total$
 $70
 $
 $
 $70
          

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets  Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
At December 31, 2019:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Mississippi Power         
Assets:         
Energy-related derivatives$
 $1
 $
 $
 $1
Cash equivalents281
 
 
 
 281
Total$281
 $1
 $
 $
 $282
Liabilities:         
Energy-related derivatives$
 $27
 $
 $
 $27
          
Southern Power         
Assets:         
Energy-related derivatives$
 $3
 $
 $
 $3
Foreign currency derivatives
 16
 
 
 16
Cash equivalents113
 
 
 
 113
Total$113
 $19
 $
 $
 $132
Liabilities:         
Energy-related derivatives$
 $3
 $
 $
 $3
Foreign currency derivatives
 24
 
 
 24
Contingent consideration
 
 19
 
 19
Total$
 $27
 $19
 $
 $46
          
Southern Company Gas         
Assets:         
Energy-related derivatives(a)(b)
$388
 $255
 $22
 $
 $665
Interest rate derivatives
 2
 
 
 2
Non-qualified deferred compensation trusts:         
Domestic equity
 11
 
 
 11
Foreign equity
 4
 
 
 4
Pooled funds - fixed income
 17
 
 
 17
Cash equivalents1
 
 
 
 1
Cash equivalents8
 
 
 
 8
Total$397
 $289
 $22
 $
 $708
Liabilities:        

Energy-related derivatives(a)(b)
$442
 $147
 $7
 $
 $596
(a)Energy-related derivatives excludesexclude $4 million associated with premiums and certain weather derivatives accounted for based on intrinsic value rather than fair value.
(b)Energy-related derivatives excludesexclude cash collateral of $62$99 million.
(c)
Excludes receivables related to investment income, pending investment sales, payables related to pending investment purchases, and currencies. See Note 6 under "Nuclear Decommissioning" for additional information.
(d)
Includes investment securities pledged to creditors and collateral received and excludes payables related to the securities lending program. See Note 6 under "Nuclear Decommissioning" for additional information.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



As of At December 31, 2015,2018, assets and liabilities measured at fair value on a recurring basis during the period, together with their associated level of the fair value hierarchy, were as follows:
Fair Value Measurements Using(a)(b)
  Fair Value Measurements Using  
Predecessor – As of December 31, 2015Quoted Prices in Active Markets for Identical Assets
(Level 1)
 Significant Other Observable Inputs
(Level 2)
 Significant Unobservable Inputs
(Level 3)
 Net Asset Value as a Practical Expedient (NAV) Total
(in millions)Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
At December 31, 2018:(Level 1) (Level 2) (Level 3) (NAV) Total
(in millions)
Southern Company         
Assets:                  
Energy-related derivatives$53
 $113
 $
 $
 $166
Interest rate derivatives
 9
 
 
 9
Energy-related derivatives(a)(b)
$469
 $292
 $
 $
 $761
Foreign currency derivatives
 75
 
 
 75
Investments in trusts:(c)(d)
         
Domestic equity601
 107
 
 
 708
Foreign equity53
 173
 
 
 226
U.S. Treasury and government agency securities
 261
 
 
 261
Municipal bonds
 83
 
 
 83
Pooled funds – fixed income
 14
 
 
 14
Corporate bonds24
 290
 
 
 314
Mortgage and asset backed securities
 68
 
 
 68
Private equity
 
 
 45
 45
Cash and cash equivalents16
 
 
 
 16
Other34
 4
 
 
 38
Cash equivalents765
 1
 
 
 766
Other investments
 12
 
 
 12
Total$53
 $122
 $
 $
 $175
$1,962
 $1,380
 $
 $45
 $3,387
Liabilities:                  
Energy-related derivatives$63
 $46
 $
 $
 $109
Energy-related derivatives(a)(b)
$648
 $316
 $
 $
 $964
Interest rate derivatives
 49
 
 
 49
Foreign currency derivatives
 23
 
 
 23
Contingent consideration
 
 21
 
 21
Total$648
 $388
 $21
 $
 $1,057
         

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
At December 31, 2018:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Alabama Power         
Assets:         
Energy-related derivatives$
 $6
 $
 $
 $6
Nuclear decommissioning trusts:(c)


 

 

   

Domestic equity396
 95
 
 
 491
Foreign equity53
 50
 
 
 103
U.S. Treasury and government agency securities
 18
 
 
 18
Municipal bonds
 1
 
 
 1
Corporate bonds24
 135
 
 
 159
Mortgage and asset backed securities
 23
 
 
 23
Private equity
 
 
 45
 45
Other6
 
 
 
 6
Cash equivalents116
 1
 
 
 117
Other investments
 12
 
 
 12
Total$595
 $341
 $
 $45
 $981
Liabilities:         
Energy-related derivatives$
 $10
 $
 $
 $10
          
Georgia Power         
Assets:         
Energy-related derivatives$
 $6
 $
 $
 $6
Nuclear decommissioning trusts:(c)(d)
         
Domestic equity205
 1
 
 
 206
Foreign equity
 119
 
 
 119
U.S. Treasury and government agency securities
 243
 
 
 243
Municipal bonds
 82
 
 
 82
Corporate bonds
 155
 
 
 155
Mortgage and asset backed securities
 45
 
 
 45
Other19
 4
 
 
 23
Total$224
 $655
 $
 $
 $879
Liabilities:         
Energy-related derivatives$
 $21
 $
 $
 $21
Interest rate derivatives
 2
 
 
 2
Total$
 $23
 $
 $
 $23
          

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 Fair Value Measurements Using  
 Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Net Asset Value as a Practical Expedient  
At December 31, 2018:(Level 1) (Level 2) (Level 3) (NAV) Total
 (in millions)
Mississippi Power         
Assets:         
Energy-related derivatives$
 $3
 $
 $
 $3
Cash equivalents255
 
 
 
 255
Total$255
 $3
 $
 $
 $258
Liabilities:         
Energy-related derivatives$
 $9
 $
 $
 $9
          
Southern Power         
Assets:         
Energy-related derivatives$
 $4
 $
 $
 $4
Foreign currency derivatives
 75
 
 
 75
Cash equivalents46
 
 
 
 46
Total$46
 $79
 $
 $
 $125
Liabilities:         
Energy-related derivatives$
 $8
 $
 $
 $8
Foreign currency derivatives
 23
 
 
 23
Contingent consideration
 
 21
 
 21
Total$
 $31
 $21
 $
 $52
          
Southern Company Gas         
Assets:         
Energy-related derivatives(a)(b)
$469
 $272
 $
 $
 $741
Non-qualified deferred compensation trusts:         
Domestic equity
 11
 
 
 11
Foreign equity
 4
 
 
 4
Pooled funds - fixed income
 14
 
 
 14
Cash equivalents4
 
 
 
 4
Cash equivalents40
 
 
 
 40
Total$513
 $301
 $
 $
 $814
Liabilities:         
Energy-related derivatives(a)(b)
$648
 $261
 $
 $
 $909
(a)Energy-related derivatives excludes $10exclude $8 million associated with premiums and certain weather derivatives accounted for based on intrinsic value rather than fair value.
(b)Energy-related derivatives excludesexclude cash collateral of $96$277 million.
(c)
Excludes receivables related to investment income, pending investment sales, payables related to pending investment purchases, and currencies. See Note 6 under "Nuclear Decommissioning" for additional information.
(d)
Includes investment securities pledged to creditors and collateral received and excludes payables related to the securities lending program. See Note 6 under "Nuclear Decommissioning" for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Valuation Methodologies
The energy-related derivatives primarily consist of exchange-traded and over-the-counter financial products for natural gas and physical power products, including, from time to time, basis swaps. These are standard products used within the energy industry and are valued using the market approach. The inputs used are mainly from observable market sources, such as forward natural gas prices, power prices, implied volatility, and overnight index swap interest rates. Interest rate derivatives are also standard OTCover-the-counter products that are valued using observable market data and assumptions commonly used by market participants. The fair value of interest rate derivatives reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future interest rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and occasionally, implied volatility of interest rate options. The fair value of cross-currency swaps reflects the net present value of expected payments and receipts under the swap agreement based on the market's expectation of future foreign currency exchange rates. Additional inputs to the net present value calculation may include the contract terms, counterparty credit risk, and discount rates. The interest rate derivatives and cross-currency swaps are categorized as Level 2 under Fair Value Measurements as these inputs are based on observable data and valuations of similar instruments. See Note 1014 for additional information on how these derivatives are used.
DebtFor fair value measurements of the investments within the nuclear decommissioning trusts and the non-qualified deferred compensation trusts, external pricing vendors are designated for each asset class with each security specifically assigned a primary pricing source. For investments held within commingled funds, fair value is determined at the end of each business day through the net asset value, which is established by obtaining the underlying securities' individual prices from the primary pricing source. A market price secured from the primary source vendor is then evaluated by management in its valuation of the assets within the trusts. As a general approach, fixed income market pricing vendors gather market data (including indices and market research reports) and integrate relative credit information, observed market movements, and sector news into proprietary pricing models, pricing systems, and mathematical tools. Dealer quotes and other market information, including live trading levels and pricing analysts' judgments, are also obtained when available.
The Company's long-term debtNRC requires licensees of commissioned nuclear power reactors to establish a plan for providing reasonable assurance of funds for future decommissioning. See Note 6 under "Nuclear Decommissioning" for additional information.
Southern Power has contingent payment obligations related to certain acquisitions whereby Southern Power is recordedprimarily obligated to make generation-based payments to the seller, which commenced at amortized cost, includingthe commercial operation of the respective facility and continue through 2026. The obligation is categorized as Level 3 under Fair Value Measurements as the fair value adjustments atis determined using significant unobservable inputs for the effective date of the Merger.forecasted facility generation in MW-hours, as well as other inputs such as a fixed dollar amount per MW-hour, and a discount rate. The Company amortizes the fair value adjustments overof contingent consideration reflects the livesnet present value of expected payments and any periodic change arising from forecasted generation is expected to be immaterial.
"Other investments" include investments traded in the respectiveopen market that have maturities greater than 90 days, which are categorized as Level 2 under Fair Value Measurements and are comprised of corporate bonds, treasury bonds, and/or agency bonds.
The following table presentsfair value measurements of private equity investments held in Alabama Power's nuclear decommissioning trusts that are calculated at net asset value per share (or its equivalent) as a practical expedient totaled $56 million and $45 million at December 31, 2019 and 2018, respectively. Unfunded commitments related to the private equity investments totaled $70 million and $50 million at December 31, 2019 and 2018, respectively. Private equity investments include high-quality private equity funds across several market sectors and funds that invest in real estate assets. Private equity funds do not have redemption rights. Distributions from these funds will be received as the underlying investments in the funds are liquidated.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2019 and 2018, other financial instruments for which the carrying amount anddid not equal fair value of the Company's long-term debtwere as of December 31:follows:
 
Carrying
Amount
 
Fair
Value
 (in millions)
Long-term debt, including securities due within one year:   
Successor – As of December 31, 2016$5,281
 $5,491
Predecessor – As of December 31, 2015$3,820
 $4,066
 
Southern
  Company(a)(b)
Alabama PowerGeorgia PowerMississippi PowerSouthern Power
Southern Company Gas(b)
 (in millions)
At December 31, 2019:      
Long-term debt, including securities due within one year:      
Carrying amount$44,561
$8,517
$11,660
$1,589
$4,398
$5,845
Fair value48,339
9,525
12,680
1,671
4,708
6,509
At December 31, 2018:      
Long-term debt, including securities due within one year:      
Carrying amount$45,023
$8,120
$9,838
$1,579
$5,017
$5,940
Fair value44,824
8,370
9,800
1,546
4,980
5,965
(a)
Amounts at December 31, 2018 include long-term debt of Gulf Power, which was classified as liabilities held for sale on Southern Company's balance sheet at December 31, 2018. See Note 15 under "Southern Company" and "Assets Held for Sale" for additional information.
(b)The long-term debt of Southern Company Gas is recorded at amortized cost, including the fair value adjustments at the effective date of the Merger. Southern Company Gas amortizes the fair value adjustments over the lives of the respective bonds.
The fair values are determined using Level 2 measurements and are based on quoted market prices for the same or similar issues or on the current rates available to the Company.Registrants.
10.Commodity Contracts with Level 3 Valuation Inputs
As of December 31, 2019, the fair value of Southern Company Gas' Level 3 physical natural gas forward contracts was $14 million. Since commodity contracts classified as Level 3 typically include a combination of observable and unobservable components, the changes in fair value may include amounts due in part to observable market factors, or changes to assumptions on the unobservable components. The following table includes transfers to Level 3, which represent the fair value of Southern Company Gas' commodity derivative contracts that include a significant unobservable component for the first time during the period.
 2019
 (in millions)
Beginning balance$
Transfers to Level 3(32)
Transfers from Level 33
Instruments realized or otherwise settled during period(4)
Changes in fair value47
Ending balance$14

Changes in fair value of Level 3 instruments represent changes in gains and losses for the periods that are reported on Southern Company Gas' statements of income in natural gas revenues.
The valuation of certain commodity contracts requires the use of certain unobservable inputs. All forward pricing used in the valuation of such contracts is directly based on third-party market data, such as broker quotes and exchange settlements, when that data is available. If third-party market data is not available, then industry standard methodologies are used to develop inputs that maximize the use of relevant observable inputs and minimize the use of unobservable inputs. Observable inputs, including some forward prices used for determining fair value, reflect the best available market information. Unobservable inputs are updated using industry standard techniques such as extrapolation, combining observable forward inputs supplemented by historical market and other relevant data. Level 3 physical natural gas forward contracts include unobservable forward price

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

inputs (ranging from $1.54 to $2.92 per mmBtu). Forward price increases (decreases) as of December 31, 2019 would have resulted in higher (lower) values on a net basis.
14. DERIVATIVES
TheSouthern Company, isthe traditional electric operating companies, Southern Power, and Southern Company Gas are exposed to market risks, primarilyincluding commodity price risk, interest rate risk, weather risk, and weatheroccasionally foreign currency exchange rate risk. To manage the volatility attributable to these exposures, the Companyeach company nets its exposures, where possible, to take advantage of natural offsets and enters into various derivative transactions for the remaining exposures pursuant to the Company'seach company's policies in areas such as counterparty exposure and risk management practices. WholesaleSouthern Company Gas' wholesale gas operations use various contracts in its commercial activities that generally meet the definition of derivatives. For the traditional electric operating companies, Southern Power, and Southern Company Gas' other businesses, the Company'seach company's policy is that derivatives are to be used primarily for hedging purposes. In both cases, the Companypurposes and mandates strict adherence to all applicable risk management policies. Derivative positions are monitored using techniques including, but not limited to, market valuation, value at risk, stress testing, and sensitivity analysis. Derivative instruments are recognized at fair value in the balance sheets as either assets or liabilities and are presented on a net basis. See Note 913 for additional fair value information. In the statements of cash flows, theany cash impacts of settled energy-related and interest rate derivatives are recorded as operating activities.

Instruments" for additional information.
Energy-Related Derivatives
The traditional electric operating companies, Southern Power, and Southern Company entersGas enter into energy-related derivatives to hedge exposures to electricity, natural gas, and other fuel price changes. However, due to cost-based rate regulations and other various cost recovery mechanisms, the traditional electric operating companies and the natural gas distribution operations hasutilities have limited exposure to market volatility in pricesenergy-related commodity prices. Each of the traditional electric operating companies and certain of the natural gas. Thegas distribution utilities of Southern Company managesGas manage fuel-hedging programs, implemented per the guidelines of the natural gas distribution utilities'their respective state PSCs or other applicable state regulatory agencies, through the use of financial derivative contracts, which isare expected to continue to mitigate price volatility. The traditional electric operating companies (with respect to wholesale generating capacity) and Southern Power have limited exposure to market volatility in energy-related commodity prices because their long-term sales contracts shift substantially all fuel cost responsibility to the purchaser. However, the traditional electric operating companies and Southern Power may be exposed to market volatility in energy-related commodity prices to the extent any uncontracted capacity is used to sell electricity. Southern Company Gas retains exposure to price changes that can, in a volatile energy market, be extremely material and can adversely affect the Company.its results of operations.
TheSouthern Company Gas also enters into weather derivative contracts as economic hedges of adjusted operating margins in the event of warmer-than-normal weather. Exchange-traded options are carried at fair value, with changes reflected in operating revenues. Non-exchange-traded options are accounted for using the intrinsic value method. Changes in the intrinsic value for non-exchange-traded contracts are reflected in the statements of income.operating revenues.
Energy-related derivative contracts are accounted for under one of three methods:
Regulatory Hedges — Energy-related derivative contracts which are designated as regulatory hedges relate primarily to the Company's fuel-hedging programs, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in the cost of natural gas as the underlying natural gas is used in operations and ultimately recovered through the respective cost recovery clauses.
Cash Flow Hedges — Gains and losses on energy-related derivatives designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales) are initially deferred in other OCI before being recognized in the statements of income in the same period as the hedged transactions are reflected in earnings.
Not Designated — Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income in the period of change.
Regulatory Hedges – Energy-related derivative contracts designated as regulatory hedges relate primarily to the traditional electric operating companies' and the natural gas distribution utilities' fuel-hedging programs, where gains and losses are initially recorded as regulatory liabilities and assets, respectively, and then are included in fuel expense as the underlying fuel is used in operations and ultimately recovered through the respective fuel cost recovery clauses.
Cash Flow Hedges – Gains and losses on energy-related derivatives designated as cash flow hedges (which are mainly used to hedge anticipated purchases and sales) are initially deferred in AOCI before being recognized in the statements of income in the same period and in the same income statement line item as the earnings effect of the hedged transactions.
Not Designated – Gains and losses on energy-related derivative contracts that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
Some energy-related derivative contracts require physical delivery as opposed to financial settlement, and this type of derivative is both common and prevalent within the electric and natural gas industry.industries. When an energy-related derivative contract is settled physically, any cumulative unrealized gain or loss is reversed and the contract price is recognized in the respective line item representing the actual price of the underlying goods being delivered.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2016,2019, the net volume of energy-related derivative contracts for natural gas positions, totaled 157 million mmBtu for the Company, together with the longest hedge date of 2018 over which the Companyrespective entity is hedging its exposure to the variability in future cash flows for forecasted transactions and the longest non-hedge date of 2022 for derivatives not designated as hedges.hedges, were as follows:
 
Net
Purchased
mmBtu
 
Longest
Hedge
Date
 
Longest
Non-Hedge
Date
 (in millions)    
Southern Company(*)
589 2023 2029
Alabama Power88 2022 
Georgia Power175 2023 
Mississippi Power101 2023 
Southern Power7 2020 2020
Southern Company Gas(*)
218 2022 2029
(*)Southern Company Gas' derivative instruments include both long and short natural gas positions. A long position is a contract to purchase natural gas and a short position is a contract to sell natural gas. Southern Company Gas' volume represents the net of long natural gas positions of 4,096 million mmBtu and short natural gas positions of 3,878 million mmBtu at December 31, 2019, which is also included in Southern Company's total volume.
At December 31, 2019, the net volume of Southern Power's energy-related derivative contracts for power to be sold was 1 million MWHs, all of which expire in 2020.
In addition to the volumes discussed above, the traditional electric operating companies and Southern Power enter into physical natural gas supply contracts that provide the option to sell back excess natural gas due to operational constraints. The maximum expected volume of natural gas subject to such a feature is 23 million mmBtu for Southern Company, which includes 6 million mmBtu for Alabama Power, 7 million mmBtu for Georgia Power, 3 million mmBtu for Mississippi Power, and 7 million mmBtu for Southern Power.
For cash flow hedges of energy-related derivatives, the amountsestimated pre-tax gains (losses) expected to be reclassified from accumulated OCIAOCI to earnings for the next 12-month periodyear ending December 31, 20172020 are immaterial.immaterial for Southern Power.
Interest Rate Derivatives
TheSouthern Company and certain subsidiaries may also enter into interest rate derivatives to hedge exposure to changes in interest rates. The derivatives employed as hedging instruments are structured to minimize ineffectiveness. Derivatives related to existing variable rate securities or forecasted transactions are accounted for as cash flow hedges where the effective portion of the derivatives' fair value gains or losses isare recorded in OCI and isare reclassified into earnings at the same time and presented on the same income statement line item as the earnings effect of the hedged transactions affect earnings, with any ineffectiveness recorded directly to earnings.transactions. Derivatives related to existing fixed rate securities are accounted for as fair value hedges, where the derivatives' fair value gains or losses and hedged items' fair value gains or losses are both recorded directly to earnings providing an offset, with any difference representing ineffectiveness.on the same income statement line item. Fair value gains or losses on derivatives that are not designated or fail to qualify as hedges are recognized in the statements of income as incurred.
In January 2015,

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

At December 31, 2019, the Company executed $800 million in notional value of 10-year and 30-year fixed-rate forward-startingfollowing interest rate swapsderivatives were outstanding:

Notional
Amount

Interest
Rate
Received

Weighted Average Interest
Rate Paid

Hedge
Maturity
Date

Fair Value
Gain (Loss) December 31, 2019

(in millions)






(in millions)
Cash Flow Hedges of Forecasted Debt







Georgia Power$250
 3-month LIBOR 2.23% March 2025 $(6)
Georgia Power250
 3-month LIBOR 2.40% March 2030 (11)
Southern Company Gas200
 3-month LIBOR 1.81% September 2030 2
Fair Value Hedges of Existing Debt







Southern Company parent300
 2.75% 3-month LIBOR + 0.92% June 2020 
Southern Company parent1,500
 2.35% 1-month LIBOR + 0.87% July 2021 (7)
Southern Company$2,500
       $(22)

The estimated pre-tax gains (losses) related to interest rate derivatives expected to be reclassified from AOCI to interest expense for the year ending December 31, 2020 total $(22) million for Southern Company and are immaterial for all other Registrants. Deferred gains and losses related to interest rate derivatives are expected to be amortized into earnings through 2046 for the Southern Company parent entity, 2035 for Alabama Power, 2044 for Georgia Power, 2028 for Mississippi Power, and 2046 for Southern Company Gas.
Foreign Currency Derivatives
Southern Company and certain subsidiaries, including Southern Power, may enter into foreign currency derivatives to hedge potential interest rate volatility priorexposure to its issuanceschanges in foreign currency exchange rates, such as that arising from the issuance of long-term debt denominated in the fourth quarter 2015 and during 2016. The Company designated the forward-starting interest rate swaps, which were settled in conjunction with the debt issuances,a currency other than U.S. dollars. Derivatives related to forecasted transactions are accounted for as cash flow hedges. The Company settled $200 million of these interest rate swapshedges where the derivatives' fair value gains or losses are recorded in November 2015 for an immaterial loss, $400 million upon pricingOCI and are reclassified into earnings at the senior notes in May 2016 at a loss of $26 million,same time and on the remaining $200 million upon pricingsame income statement line as the senior notes in September 2016 at a loss of $35 million. Due to the application of acquisition accounting, only $5 millionearnings effect of the pre-tax loss incurred and deferredhedged transactions, including foreign currency gains or losses arising from changes in the successor period willU.S. currency exchange rates. The derivatives employed as hedging instruments are structured to minimize ineffectiveness.
At December 31, 2019, the following foreign currency derivatives were outstanding:
 Pay NotionalPay RateReceive NotionalReceive RateHedge
Maturity Date
Fair Value
Gain (Loss) December 31, 2019
 (in millions) (in millions)  (in millions)
Cash Flow Hedges of Existing Debt     
Southern Power$677
2.95%600
1.00%June 2022$(7)
Southern Power564
3.78%500
1.85%June 2026(1)
Total$1,241
 1,100
  $(8)

The estimated pre-tax gains (losses) related to Southern Power's foreign currency derivatives expected to be amortizedreclassified from AOCI to interest expense through 2046, which is immaterial on an annual basis.earnings for the year ending December 31, 2020 are $(24) million.
Derivative Financial Statement Presentation and Amounts
TheSouthern Company, the traditional electric operating companies, Southern Power, and Southern Company Gas enter into derivative contracts of the Company are subject to master netting arrangements or similar agreements and are reported net in the financial statements. Some of these energy-related and interest rate derivative contractsthat may contain certain provisions that

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


permit intra-contract netting of derivative receivables and payables for routine billing and offsets related to events of default and settlements. Southern Company and certain subsidiaries also utilize

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

master netting agreements to mitigate exposure to counterparty credit risk. These agreements may contain provisions that permit netting across product lines and against cash collateral. The fair value amounts of derivative assets and liabilities on the balance sheets are presented net to the extent that there are netting arrangements or similar agreements with the counterparties.
At December 31, 20162019 and 2015,2018, the fair value of energy-related derivatives, and interest rate derivatives, and foreign currency derivatives was reflected in the consolidated balance sheets as follows:
 Asset Derivatives Liability Derivatives20192018
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 Successor  Predecessor Successor  Predecessor(in millions)
Derivative CategoryBalance Sheet LocationDecember 31, 2016  December 31, 2015Balance Sheet LocationDecember 31, 2016  December 31, 2015
 (in millions)  (in millions) (in millions)  (in millions)
Southern Company 
Derivatives designated as hedging instruments for regulatory purposesDerivatives designated as hedging instruments for regulatory purposes          
Energy-related derivatives:Energy-related derivatives:          
Assets from risk management activities – current$24
  $10
Liabilities from risk management activities – current$3
  $28
Other deferred charges and assets1
  
Other deferred credits and liabilities
  2
Other current assets/Other current liabilities$3
$70
$8
$23
Other deferred charges and assets/Other deferred credits and liabilities6
44
9
26
Assets held for sale, current/Liabilities held for sale, current


6
Total derivatives designated as hedging instruments for regulatory purposesTotal derivatives designated as hedging instruments for regulatory purposes$25
  $10
 $3
 
$30
$9
$114
$17
$55
Derivatives designated as hedging instruments in cash flow and fair value hedgesDerivatives designated as hedging instruments in cash flow and fair value hedges          
Energy-related derivatives:Energy-related derivatives:          
Assets from risk management activities – current$4
  $3
Liabilities from risk management activities – current$3
  $5
Other deferred charges and assets
  
Other deferred credits and liabilities
  2
Other current assets/Other current liabilities$1
$6
$3
$7
Other deferred charges and assets/Other deferred credits and liabilities

1
2
Interest rate derivatives:Interest rate derivatives:          
Assets from risk management activities – current
  9
Liabilities from risk management activities – current
  
Other current assets/Other current liabilities2
23

19
Other deferred charges and assets/Other deferred credits and liabilities
1

30
Foreign currency derivatives: 
Other current assets/Other current liabilities
24

23
Other deferred charges and assets/Other deferred credits and liabilities16

75

Total derivatives designated as hedging instruments in cash flow and fair value hedgesTotal derivatives designated as hedging instruments in cash flow and fair value hedges$4
  $12
 $3
  $7
$19
$54
$79
$81
Derivatives not designated as hedging instrumentsDerivatives not designated as hedging instruments          
Energy-related derivatives:Energy-related derivatives:          
Other current assets/Other current liabilities$461
$358
$561
$575
Other deferred charges and assets/Other deferred credits and liabilities207
225
180
325
Total derivatives not designated as hedging instruments$668
$583
$741
$900
Gross amounts recognized$696
$751
$837
$1,036
Gross amounts offset(a)
$(463)$(562)$(524)$(801)
Net amounts recognized in the Balance Sheets(b)
$233
$189
$313
$235
Assets from risk management activities – current$486
  $741
Liabilities from risk management activities – current$482
  $644
 
Other deferred charges and assets66
  179
Other deferred credits and liabilities81
  185
Total derivatives not designated as hedging instruments$552
  $920
 $563
  $829
Gross amounts of recognized assets and liabilities(a)(b)
$581
  $942
 $569
  $866
Gross amounts offset in the Balance Sheet$(435)  $(724) $(497)  $(820)
Net amounts of derivatives assets and liabilities, presented in the Balance Sheet(c)
$146
  $218
 $72
  $46

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 20192018
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 (in millions)
Alabama Power    
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Other current assets/Other current liabilities$2
$14
$3
$4
Other deferred charges and assets/Other deferred credits and liabilities2
10
3
6
Total derivatives designated as hedging instruments for regulatory purposes$4
$24
$6
$10
Gross amounts recognized$4
$24
$6
$10
Gross amounts offset$(2)$(2)$(4)$(4)
Net amounts recognized in the Balance Sheets$2
$22
$2
$6
     
Georgia Power    
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Other current assets/Other current liabilities$1
$32
$2
$8
Other deferred charges and assets/Other deferred credits and liabilities3
21
4
13
Total derivatives designated as hedging instruments for regulatory purposes$4
$53
$6
$21
Derivatives designated as hedging instruments in cash flow and fair value hedges



  
Interest rate derivatives:



  
Other current assets/Other current liabilities$
$17
$
$2
Total derivatives designated as hedging instruments in cash flow and fair value hedges$
$17
$
$2
Gross amounts recognized$4
$70
$6
$23
Gross amounts offset$(3)$(3)$(6)$(6)
Net amounts recognized in the Balance Sheets$1
$67
$
$17
     

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 20192018
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 (in millions)
Mississippi Power    
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Other current assets/Other current liabilities$
$15
$1
$3
Other deferred charges and assets/Other deferred credits and liabilities1
12
2
6
Total derivatives designated as hedging instruments for regulatory purposes$1
$27
$3
$9
Gross amounts recognized$1
$27
$3
$9
Gross amounts offset$(1)$(1)$(2)$(2)
Net amounts recognized in the Balance Sheets$
$26
$1
$7
     
Southern Power    
Derivatives designated as hedging instruments in cash flow and fair value hedges    
Energy-related derivatives:    
Other current assets/Other current liabilities$1
$2
$3
$6
Other deferred charges and assets/Other deferred credits and liabilities

1
2
Foreign currency derivatives:    
Other current assets/Other current liabilities
24

23
Other deferred charges and assets/Other deferred credits and liabilities16

75

Total derivatives designated as hedging instruments in cash flow and fair value hedges$17
$26
$79
$31
Derivatives not designated as hedging instruments    
Energy-related derivatives:    
Other current assets/Other current liabilities$2
$1
$
$
Total derivatives not designated as hedging instruments$2
$1
$
$
Gross amounts recognized$19
$27
$79
$31
Gross amounts offset$
$
$(3)$(3)
Net amounts recognized in the Balance Sheets$19
$27
$76
$28
     

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

 20192018
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
 (in millions)
Southern Company Gas    
Derivatives designated as hedging instruments for regulatory purposes    
Energy-related derivatives:    
Assets from risk management activities/Liabilities from risk management activities-current$
$9
$2
$8
Other deferred charges and assets/Other deferred credits and liabilities
1

1
Total derivatives designated as hedging instruments for regulatory purposes$
$10
$2
$9
Derivatives designated as hedging instruments in cash flow and fair value hedges    
Energy-related derivatives:    
Assets from risk management activities/Liabilities from risk management activities-current$
$4
$
$1
Interest rate derivatives:    
Assets from risk management activities/Liabilities from risk management activities-current2



Total derivatives designated as hedging instruments in cash flow and fair value hedges$2
$4
$
$1
Derivatives not designated as hedging instruments    
Energy-related derivatives:    
Assets from risk management activities/Liabilities from risk management activities-current$459
$357
$559
$574
Other deferred charges and assets/Other deferred credits and liabilities207
225
180
325
Total derivatives not designated as hedging instruments$666
$582
$739
$899
Gross amounts recognized$668
$596
$741
$909
Gross amounts offset(a)
$(456)$(555)$(508)$(785)
Net amounts recognized in the Balance Sheets (b)
$212
$41
$233
$124
(a)The grossGross amounts of recognized assets and liabilities are netted on the balance sheets to the extent that there were netting arrangements with the counterparties.
(b)The gross amounts of recognized assets and liabilities do notoffset include cash collateral held on deposit in broker margin accounts of $62$99 million as ofand $277 million at December 31, 20162019 and $96 million as of December 31, 2015.2018, respectively.
(c)(b)AsNet amounts of derivative instruments outstanding exclude premium and intrinsic value associated with weather derivatives of $4 million and $8 million at December 31, 20162019 and 2015, letters of credit from counterparties offset an immaterial portion of these assets under master netting arrangements.2018, respectively.
Energy-related derivatives not designated as hedging instruments were immaterial for the traditional electric operating companies at December 31, 2019 and 2018.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



At December 31, 20162019 and 2015,2018, the pre-tax effecteffects of unrealized derivative gains (losses) arising from energy-related derivativesderivative instruments designated as regulatory hedging instruments and deferred were as follows:
  Unrealized Losses  Unrealized Gains
  Successor  Predecessor  Successor  Predecessor
Derivative CategoryBalance Sheet LocationDecember 31, 2016  December 31, 2015 Balance Sheet LocationDecember 31, 2016  December 31, 2015
  (in millions)  (in millions)  (in millions)  (in millions)
Energy-related derivatives:          
 Other regulatory assets, current$(1)  $(15) Other regulatory liabilities, current$17
  $15
 Other regulatory assets, deferred
  (2) Other regulatory liabilities, deferred1
  
Total energy-related derivative gains (losses)(*)
$(1)  $(17)  $18
  $15
Regulatory Hedge Unrealized Gain (Loss) Recognized in the Balance Sheet at December 31, 2019
Derivative Category and Balance Sheet
Location
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern Company Gas
 (in millions)
Energy-related derivatives:     
Other regulatory assets, current$(63)$(14)$(31)$(15)$(3)
Other regulatory assets, deferred(37)(8)(18)(11)
Other regulatory liabilities, current6
2


4
Total energy-related derivative gains (losses)$(94)$(20)$(49)$(26)$1
(*)Fair value gains and losses included in regulatory assets and liabilities include cash collateral held on deposit in broker margin accounts of $8 million as of December 31, 2016 and $19 million as of December 31, 2015.
Regulatory Hedge Unrealized Gain (Loss) Recognized in the Balance Sheet at December 31, 2018
Derivative Category and Balance Sheet
Location
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern Company Gas
 (in millions)
Energy-related derivatives:     
Other regulatory assets, current$(19)$(3)$(6)$(2)$(8)
Other regulatory assets, deferred(16)(3)(9)(4)
Assets held for sale, current(6)



Other regulatory liabilities, current1



1
Total energy-related derivative gains (losses)$(40)$(6)$(15)$(6)$(7)

For the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 20152019, 2018, and 2014,2017, the pre-tax effecteffects of cash flow hedge accounting on AOCI for the applicable Registrants were as follows:
Gain (Loss) Recognized in OCI on Derivative201920182017
 (in millions)
Southern Company   
Energy-related derivatives$(13)$17
$(47)
Interest rate derivatives(57)(1)(2)
Foreign currency derivatives(84)(78)140
Total$(154)$(62)$91
Georgia Power   
Interest rate derivatives$(59)$
$1
Southern Power   
Energy-related derivatives$(4)$10
$(38)
Foreign currency derivatives(84)(78)140
Total$(88)$(68)$102
Southern Company Gas   
Energy-related derivatives$(9)$7
$(9)
Interest rate derivatives2


Total$(7)$7
$(9)

For all years presented, the pre-tax effects of energy-related derivatives and interest rate derivatives designated as cash flow hedging instruments recognized in OCIon AOCI were immaterial for the other Registrants. In addition, for the year ended December 31, 2017, there

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and those reclassified from accumulated OCI into earnings were as follows:
Subsidiary Companies 2019 Annual Report
 
Gain (Loss) Recognized in OCI on Derivative
 (Effective Portion)
  Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
 Successor  Predecessor  Successor  Predecessor
Derivatives in Cash Flow Hedging RelationshipsJuly 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 Statements of Income LocationJuly 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016
 (in millions)  (in millions)  (in millions)  (in millions)
Energy-related derivatives$2
  $
 Cost of natural gas$(1)  $(1)
Interest rate derivatives(5)  (64) Interest expense, net of amounts capitalized
  
Total derivatives in cash flow
hedging relationships
$(3)  $(64)  $(1)  $(1)

 Gain (Loss) Recognized in OCI on Derivative (Effective Portion)  Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)
 Predecessor  Predecessor
Derivatives in Cash Flow Hedging Relationships2015  2014 Statements of Income Location2015  2014
 (in millions)  (in millions)
Energy-related derivatives$3
  $(8) Cost of natural gas$(10)  $4
      Other operations and maintenance(1)  1
Interest rate derivatives
  
 Interest expense, net of amounts capitalized2
  
Total derivatives in cash flow
hedging relationships
$3
  $(8)  $(9)  $5
There was no material ineffectiveness recorded in earnings for any period presented.Registrant. Upon the adoption of ASU 2017-12, beginning in 2018, ineffectiveness was no longer separately measured and recorded in earnings.

NOTES (continued)
Southern Company Gascash flow and Subsidiary Companies 2016 Annual Report


For the successor period of July 1, 2016 through December 31, 2016 and the predecessor periods of January 1, 2016 through June 30, 2016 andfair value hedge accounting on income for the years ended December 31, 20152019, 2018, and 2014,2017 were as follows:
Location and Amount of Gain (Loss) Recognized in Income on Cash Flow and Fair Value Hedging Relationships201920182017
 (in millions)
Southern Company   
Total cost of natural gas$1,319
$1,539
$1,601
Gain (loss) on energy-related cash flow hedges(a)
(2)2
(2)
Total depreciation and amortization3,038
3,131
3,010
Gain (loss) on energy-related cash flow hedges(a)
(6)7
(16)
Total interest expense, net of amounts capitalized(1,736)(1,842)(1,694)
Gain (loss) on interest rate cash flow hedges(a)
(20)(21)(21)
Gain (loss) on foreign currency cash flow hedges(a)
(24)(24)(23)
Gain (loss) on interest rate fair value hedges(b)
42
(12)(22)
Total other income (expense), net252
114
163
Gain (loss) on foreign currency cash flow hedges(a)(c)
(24)(60)160
Alabama Power   
Total interest expense, net of amounts capitalized$(336)$(323)$(305)
Gain (loss) on interest rate cash flow hedges(a)
(6)(6)(6)
Georgia Power   
Total interest expense, net of amounts capitalized$(409)$(397)$(419)
Gain (loss) on interest rate cash flow hedges(a)
(3)(4)(4)
Gain (loss) on interest rate fair value hedges(b)
2
2
(3)
Mississippi Power   
Total interest expense, net of amounts capitalized$(69)$(76)$(42)
Gain (loss) on interest rate cash flow hedges(a)
(2)(2)(2)
Southern Power   
Total depreciation and amortization$479
$493
$503
Gain (loss) on energy-related cash flow hedges(a)
(6)7
(17)
Total interest expense, net of amounts capitalized(169)(183)(191)
Gain (loss) on foreign currency cash flow hedges(a)
(24)(24)(23)
Total other income (expense), net47
23
1
Gain (loss) on foreign currency cash flow hedges(a)(c)
(24)(60)159
Southern Company Gas   
Total cost of natural gas$1,319
$1,539
$1,601
Gain (loss) on energy-related cash flow hedges(a)
(2)2
(2)
(a)Reclassified from AOCI into earnings.
(b)For fair value hedges, changes in the fair value of the derivative contracts are generally equal to changes in the fair value of the underlying debt and have no material impact on income.
(c)The reclassification from AOCI into other income (expense), net completely offsets currency gains and losses arising from changes in the U.S. currency exchange rates used to record the euro-denominated notes.
The pre-tax effects of energy-relatedcash flow hedge accounting on income for interest rate derivatives were immaterial for Southern Company Gas for all years presented.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and interest rateSubsidiary Companies 2019 Annual Report

At December 31, 2019 and 2018, the following amounts were recorded on the balance sheets related to cumulative basis adjustments for fair value hedges:
 Carrying Amount of the Hedged Item Cumulative Amount of Fair Value Hedging Adjustment included in Carrying Amount of the Hedged Item
Balance Sheet Location of Hedged ItemsAt December 31, 2019At December 31, 2018 At December 31, 2019At December 31, 2018
 (in millions) (in millions)
Southern Company     
Securities due within one year$
$(498) $
$2
Long-term debt(2,093)(2,052) 3
41
      
Georgia Power     
Securities due within one year$
$(498) $
$2

The pre-tax effects of energy-related derivatives not designated as hedging instruments on the statements of income for the years ended December 31, 2019, 2018, and 2017 for the applicable Registrants were as follows:


Gain (Loss)
Derivatives in Non-Designated Hedging RelationshipsStatements of Income Location2019
2018
2017


(in millions)
Southern Company      
Energy-related derivatives
Natural gas revenues(*)
$223
 $(122) $(80)
 Cost of natural gas10
 (6) (2)
 Wholesale electric revenues2
 2
 (4)
Total derivatives in non-designated hedging relationships$235

$(126)
$(86)
       
Southern Company Gas      
Energy-related derivatives
Natural gas revenues(*)
$223
 $(122) $(80)
 Cost of natural gas10
 (6) (2)
Total derivatives in non-designated hedging relationships$233
 $(128) $(82)
  Gain (Loss)
  Successor  Predecessor
  July 1, 2016 through December 31,  January 1, 2016 through June 30, Years Ended December 31,
Derivatives in Non-Designated Hedging RelationshipsStatements of Income Location2016  2016 2015 2014
  (in millions)  (in millions)
Energy-related derivatives
Natural gas revenues(*)
$33
  $(1) $56
 $149
 Cost of natural gas3
  (62) (6) (7)
Total derivatives in non-designated hedging relationships$36
  $(63) $50
 $142

(*)Excludes gains (losses)the impact of weather derivatives recorded in cost of natural gas associated with weather derivativesrevenues of $6 million for the successor periods of July 1, 2016 through December 31, 2016 and $3 million, $12$5 million, and $(7)$23 million for the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 20152019, 2018, and 2014, respectively.2017, respectively, as they are accounted for based on intrinsic value rather than fair value.
The pre-tax effects of energy-related derivatives not designated as hedging instruments were immaterial for all other Registrants for all years presented.
Contingent Features
TheSouthern Company, doesthe traditional electric operating companies, Southern Power, and Southern Company Gas do not have any credit arrangements that would require material changes in payment schedules or terminations as a result of a credit rating downgrade. There are certain derivatives that could require collateral, but not accelerated payment, in the event of avarious credit rating change below BBB- and/or Baa3.changes of certain Southern Company subsidiaries. At December 31, 2016,2019, the CompanyRegistrants had no collateral posted with derivative counterparties to satisfy these arrangements.
AtFor the Registrants with interest rate derivatives at December 31, 2016,2019, the fair value of interest rate derivative liabilities with contingent features was $5 million and the maximum potential collateral requirements arising from the credit-risk-related contingent features, at a rating below BBB- and/or Baa3, was $9 million.immaterial. At December 31, 2019, the fair value of energy-related derivative liabilities with contingent features and the maximum potential collateral requirements arising from the credit-risk-related contingent features, at a rating below BBB- and/or Baa3, were immaterial for all Registrants. The maximum potential collateral requirements arising from the credit-risk-related contingent features for the traditional electric operating companies and Southern Power include certain agreements that could require collateral in the event that one or more Southern Company power pool participants has a credit

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

rating change to below investment grade. Following the sale of Gulf Power to NextEra Energy, Gulf Power is continuing to participate in the Southern Company power pool for a defined transition period that, subject to certain potential adjustments, is scheduled to end on January 1, 2024.
Generally, collateral may be provided by a Southern Company guaranty, letter of credit, or cash. If collateral is required, fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral are not offset against fair value amounts recognized for derivatives executed with the same counterparty.
Alabama Power and Southern Power maintain accounts with certain regional transmission organizations to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Alabama Power and Southern Power may be required to post collateral. At December 31, 2019, cash collateral posted in these accounts was immaterial. Southern Company Gas maintains accounts with brokers or the clearing houses of certain exchanges to facilitate financial derivative transactions. Based on the value of the positions in these accounts and the associated margin requirements, Southern Company Gas may be required to deposit cash into these accounts. At December 31, 2019, cash collateral held on deposit in broker margin accounts was $99 million.
The Company isRegistrants are exposed to losses related to financial instruments in the event of counterparties' nonperformance. The Company hasRegistrants only enter into agreements and material transactions with counterparties that have investment grade credit ratings by Moody's and S&P or with counterparties who have posted collateral to cover potential credit exposure. The Registrants have also established risk management policies and controls to determine and monitor the creditworthiness of counterparties in order to mitigate the Company'stheir exposure to counterparty credit risk. Prior to entering into a physical transaction, theSouthern Company Gas assigns physical wholesale counterparties an internal credit rating and credit limit based on the counterparties' Moody's, S&P, and Fitch ratings, commercially available credit reports, and audited financial statements. TheSouthern Company Gas may require counterparties to pledge additional collateral when deemed necessary. Credit
In addition, Southern Company Gas conducts credit evaluations are conducted and obtains appropriate internal approvals are obtained for athe counterparty's line of credit before any transaction with the counterparty is executed. In most cases, the counterparty must have an investment grade rating, which includes a minimum long-term debt rating of Baa3 from Moody's and BBB- from S&P. Generally, theSouthern Company Gas requires credit enhancements by way of a guaranty, cash deposit, or letter of credit for transaction counterparties that do not have investment grade ratings.
TheSouthern Company Gas also utilizes master netting agreements whenever possible to mitigate exposure to counterparty credit risk. When theSouthern Company Gas is engaged in more than one outstanding derivative transaction with the same counterparty and it also has a legally enforceable netting agreement with that counterparty, the "net" mark-to-market exposure represents the netting of the positive and negative exposures with that counterparty and a reasonable measure of the Company'sSouthern Company Gas' credit risk. TheSouthern Company Gas also uses other netting agreements with certain counterparties with whom it conducts significant transactions. Master netting agreements enable theSouthern Company Gas to net certain assets and liabilities by counterparty. TheSouthern Company Gas also nets across product lines and against cash collateral provided the master netting and cash collateral agreements include such provisions. TheSouthern Company Gas may require counterparties to pledge additional collateral when deemed necessary. Therefore, the Company does
The Registrants do not anticipate a material adverse effect on thetheir respective financial statements as a result of counterparty nonperformance.
15. ACQUISITIONS AND DISPOSITIONS
Southern Company
On January 1, 2019, Southern Company completed the sale of all of the capital stock of Gulf Power to 700 Universe, LLC, a wholly-owned subsidiary of NextEra Energy, for an aggregate cash purchase price of approximately $5.8 billion (less $1.3 billion of indebtedness assumed), including the final working capital adjustments. The gain associated with the sale of Gulf Power totaled $2.6 billion pre-tax ($1.4 billion after tax). The assets and liabilities of Gulf Power were classified as assets held for sale and liabilities held for sale on Southern Company's balance sheet as of December 31, 2018. See "Assets Held for Sale" herein for additional information.
On July 22, 2019, PowerSecure completed the sale of its utility infrastructure services business for approximately $65 million, including the final working capital adjustments. In contemplation of this sale, a goodwill impairment charge of $32 million was recorded in the second quarter 2019.
On December 30, 2019, Southern Company completed the sale of one of its leveraged lease investments for an aggregate cash purchase price of approximately $20 million. The sale resulted in an immaterial gain.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

On December 31, 2019, PowerSecure completed the sale of its lighting business for approximately $9 million, which included cash of $4 million and a note receivable from the buyer of $5 million. In contemplation of this sale, an impairment charge of $18 million was recorded in the third quarter 2019 related to goodwill, identifiable intangibles, and other assets.
Alabama Power
On September 6, 2019, Alabama Power entered into the Autauga Combined Cycle Acquisition, a purchase and sale agreement to acquire all of the equity interests in Tenaska Alabama II Partners, L.P. Tenaska Alabama II Partners, L.P. owns and operates an approximately 885-MW combined cycle generation facility in Autauga County, Alabama. The transaction is expected to close by September 1, 2020. As part of the Autauga Combined Cycle Acquisition, Alabama Power will assume an existing power sales agreement under which the full output of the generating facility remains committed to another third party for its remaining term of approximately three years. The estimated revenues from the power sales agreement are expected to offset the associated costs of operation during the remaining term.
The completion of the Autauga Combined Cycle Acquisition is subject to the satisfaction or waiver of certain conditions, including, among other customary conditions, approval by the Alabama PSC and the FERC. Alabama Power expects to obtain all regulatory approvals by the end of the third quarter 2020.
The ultimate outcome of this matter cannot be determined at this time.
Southern Power
During 2019 and 2018, Southern Power or one of its wholly-owned subsidiaries acquired, completed, or continued construction of the facilities discussed below. Acquisition-related costs were expensed as incurred and were not material for any of the years presented.
Acquisitions During 2019
During 2019, Southern Power acquired a controlling interest in the fuel cell generation facility listed below and acquired the Skookumchuck wind facility discussed under "Construction Projects" below.
Project FacilityResourceSeller
Approximate Nameplate Capacity (MW)
Location
Southern
Power
Ownership Percentage
CODPPA Remaining Period
DSGP(a)
Fuel CellBloom Energy28Delaware100% of Class B
N/A(b)
15 years
(a)During 2019, Southern Power made a total investment of approximately $167 million in DSGP and now holds a controlling interest and consolidates 100% of DSGP's operating results. Southern Power records net income attributable to noncontrolling interests for approximately 10 MWs of the facility.
(b)Southern Power's 18-MW share of the facility was repowered between June and August 2019. In December 2019, a Class C member joined the existing partnership between the Class A member and Southern Power and made an investment to repower the remaining 10 MWs. In connection with the Class C member joining the partnership, the original fuel cells (before repower), which had a carrying value of approximately $55 million, were distributed to the Class A member in a non-cash transaction that was excluded from the statements of cash flows.
Acquisitions During 2018
During 2018, Southern Power acquired and completed the project below and acquired the Wildhorse Mountain and Reading wind facilities discussed under "Construction Projects" below.
Project FacilityResourceSeller
Approximate Nameplate Capacity (MW)
Location
Southern Power
Ownership Percentage
CODPPA Contract Period
Gaskell West 1SolarRecurrent Energy Development Holdings, LLC20Kern County, CA100% of Class B
(*)
March
2018
20 years
(*)Southern Power owns 100% of the Class B membership interests under a tax equity partnership.
The Gaskell West 1 facility did not have operating revenues or activities prior to being placed in service during March 2018.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Construction Projects
During 2019, Southern Power completed construction of and placed in service the 385-MW Plant Mankato expansion and the Wildhorse Mountain facility, acquired and continued construction of the Skookumchuck facility, and continued construction of the Reading facility. Total aggregate construction costs, excluding acquisition costs, are expected to be between $490 million and $535 million for the 2 facilities under construction. At December 31, 2019, total costs of construction incurred for the 2 facilities under construction were $417 million and are included in CWIP. The ultimate outcome of these matters cannot be determined at this time.
Project FacilityResource
Approximate Nameplate Capacity (MW)
Location
Actual/Expected
COD
PPA Contract Period
Projects Completed During the Year Ended December 31, 2019
Mankato expansion(a)
Natural Gas385Mankato, MNMay 201920 years
Wildhorse Mountain(b)
Wind100Pushmataha County, OKDecember 201920 years
Projects Under Construction at December 31, 2019
Reading(c)
Wind200Osage and Lyon Counties, KSSecond quarter 202012 years
Skookumchuck(d)
Wind136Lewis and Thurston Counties, WASecond quarter 202020 years
(a)
Southern Power completed the sale of its equity interests in Plant Mankato, including the expansion, to a subsidiary of Xcel on January 17, 2020. The expansion unit started providing energy under a PPA with Northern States Power on June 1, 2019. See "Sales of Natural Gas and Biomass Plants" below and "Assets Held for Sale" herein for additional information.
(b)In May 2018, Southern Power purchased 100% of the membership interests of the Wildhorse Mountain facility. In December 2019, Southern Power entered into a tax equity partnership and, as a result, owns 100% of the Class B membership interests.
(c)In August 2018, Southern Power purchased 100% of the membership interests of the Reading facility pursuant to a joint development arrangement. Southern Power may enter into a tax equity partnership, in which case it would then own 100% of the Class B membership interests. The ultimate outcome of this matter cannot be determined at this time.
(d)In October 2019, Southern Power purchased 100% of the membership interests of the Skookumchuck facility pursuant to a joint development arrangement. In December 2019, Southern Power entered into a tax equity agreement as the Class B member with funding of the tax equity amounts expected to occur upon commercial operation. Shortly after commercial operation, Southern Power may sell a noncontrolling interest in these Class B membership interests to another partner. The ultimate outcome of this matter cannot be determined at this time.
Development Projects
Southern Power continues to evaluate and refine the deployment of the remaining wind turbine equipment purchased in 2016 and 2017 to development and construction projects. Wind projects utilizing equipment purchased in 2016 and 2017, and reaching commercial operation by the end of 2020 and 2021, are expected to qualify for 100% and 80% PTCs, respectively. The significant majority of this equipment either has been deployed to completed projects, projects under construction, or projects that are probable of being completed or has been sold to third parties. In 2018, as a result of a review of various options for probable dispositions of wind turbine equipment not deployed to development or construction projects, Southern Power recorded a $36 million asset impairment charge on the equipment. Sales during 2019 resulted in gains totaling approximately $17 million.
Sales of Renewable Facility Interests
In May 2018, Southern Power completed the sale of a noncontrolling 33% equity interest in SP Solar, a limited partnership indirectly owning substantially all of Southern Power's solar facilities, to Global Atlantic for approximately $1.2 billion. Since Southern Power retained control of the limited partnership through its wholly-owned general partner, the sale was recorded as an equity transaction. On the date of the transaction, the noncontrolling interest was increased by $511 million to reflect 33% of the carrying value of the partnership. This difference, partially offset by the tax impact and other related transaction charges, also resulted in a $410 million decrease to Southern Power's common stockholder's equity.
In December 2018, Southern Power completed the sale of a noncontrolling tax equity interest in SP Wind, which owns a portfolio of 8 operating wind facilities, to 3 financial investors for approximately $1.2 billion. The tax equity investors together will generally receive 40% of the cash distributions from available cash and will receive 99% of the tax attributes, including future PTCs.
Southern Power consolidates each entity, as the primary beneficiary of the VIE, since it controls the most significant activities, including operating and maintaining the assets.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Sales of Natural Gas and Biomass Plants
In December 2018, Southern Power completed the sale of all of its equity interests in the Florida Plants to NextEra Energy for $203 million, including working capital adjustments. In contemplation of this sale transaction, Southern Power recorded an asset impairment charge of approximately $119 million ($89 million after tax) in May 2018.
On June 13, 2019, Southern Power completed the sale of its equity interests in Plant Nacogdoches, a 115-MW biomass facility located in Nacogdoches County, Texas, to Austin Energy, for a purchase price of approximately $461 million, including working capital adjustments. Southern Power recorded a gain of $23 million ($88 million after tax) on the sale.
On January 17, 2020, Southern Power completed the sale of its equity interests in Plant Mankato (including the 385-MW expansion unit completed in May 2019) to a subsidiary of Xcel for a purchase price of approximately $663 million, including estimated working capital adjustments. The sale resulted in a gain of approximately $39 million ($23 million after tax) in 2020. The assets and liabilities of Plant Mankato are classified as held for sale on Southern Company's and Southern Power's balance sheets as of December 31, 2019 and 2018. See "Assets Held for Sale" herein for additional information.
Southern Company Gas
Sale of Pivotal Home Solutions
In June 2018, Southern Company Gas completed the stock sale of Pivotal Home Solutions to American Water Enterprises LLC for a total cash purchase price of $365 million, which includes the final working capital adjustment. This disposition resulted in a net loss of $67 million, which includes $34 million of income tax expense. In contemplation of the transaction, a goodwill impairment charge of $42 million was recorded during the first quarter 2018. The income tax expense included tax on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. Southern Company Gas and Subsidiary Companies 2016 Annual Report


11. MERGER AND ACQUISITION
Merger withAmerican Water Enterprises LLC entered into a transition services agreement whereby Southern Company Gas provided certain administrative and operational services through November 4, 2018.
OnSales of Elizabethtown Gas and Elkton Gas
In July 1, 2016, the2018, a Southern Company Gas subsidiary, Pivotal Utility Holdings, completed the Merger withsales of the assets of 2 of its natural gas distribution utilities, Elizabethtown Gas and Elkton Gas, to South Jersey Industries, Inc. for a total cash purchase price of $1.7 billion, which includes the final working capital and other adjustments. This disposition resulted in a pre-tax gain that was entirely offset by $205 million of income tax expense, resulting in 0 material net income impact. The income tax expense included tax on goodwill not deductible for tax purposes and for which a deferred tax liability had not been recorded previously. Southern Company. ACompany Gas and South Jersey Industries, Inc. entered into transition services agreements whereby Southern Company Gas will provide certain administrative and operational services through no later than July 31, 2020.
Sale of Florida City Gas
In July 2018, Southern Company Gas and its wholly-owned direct subsidiary, NUI Corporation, completed the stock sale of Southern Company merged with and into Southern CompanyPivotal Utility Holdings, which primarily consisted of Florida City Gas, with the Company surviving asto NextEra Energy for a wholly-owned, direct subsidiary of Southern Company.
At the effective time of the Merger, each share of Southern Company Gas common stock, other than certain excluded shares, was converted into the right to receive $66 intotal cash without interest. Also at the effective time of the Merger, all of the outstanding restricted stock units, restricted stock awards, non-employee director stock awards, stock options, and performance share units were either redeemed or converted into Southern Company's restricted stock units. See Note 8 for additional information.
The application of the acquisition method of accounting was pushed down to the Company. The excess of the purchase price over the fair values of the Company's assets and liabilities was recorded as goodwill,$587 million, which represents a different basis of accounting from the historical basis prior to the Merger. The following table presentsincludes the final purchase price allocation:
 Successor  Predecessor  
 New Basis  Old Basis Change in Basis
 (in millions)  (in millions)
Current assets$1,557
  $1,474
 $83
Property, plant, and equipment10,108
  10,148
 (40)
Goodwill5,967
  1,813
 4,154
Other intangible assets400
  101
 299
Regulatory assets1,118
  679
 439
Other assets229
  273
 (44)
Current liabilities(2,201)  (2,205) 4
Other liabilities(4,742)  (4,600) (142)
Long-term debt(4,261)  (3,709) (552)
Contingently redeemable noncontrolling interest(174)  (41) (133)
Total purchase price/equity$8,001
  $3,933
 $4,068
Measurement period adjustments were recorded to the purchase price allocation during the fourth quarter 2016, whichworking capital adjustment. This disposition resulted in a net $30gain of $16 million, increase inwhich includes $103 million of income tax expense. The income tax expense included tax on goodwill to establish intangible liabilitiesnot deductible for transportation contracts at wholesale services, partially offset by adjustments totax purposes and for which a deferred tax balances.liability had not been recorded previously. Southern Company Gas and NextEra Energy entered into a transition services agreement whereby Southern Company Gas will provide certain administrative and operational services through no later than July 29, 2020.
In determiningSale of Triton
On May 29, 2019, Southern Company Gas sold its investment in Triton, a cargo container leasing company that was aggregated into Southern Company Gas' all other segment. This disposition resulted in a pre-tax loss of $6 million and a net after-tax gain of $7 million as a result of reversing a $13 million federal income tax valuation allowance.
Proposed Sale of Pivotal LNG and Atlantic Coast Pipeline
On February 7, 2020, Southern Company Gas entered into agreements with Dominion Modular LNG Holdings, Inc. and Dominion Atlantic Coast Pipeline, LLC for the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline, respectively, for an aggregate purchase price of $165 million, including estimated working capital and timing adjustments. Southern Company Gas may also receive 2 payments of $5 million each, contingent upon certain milestones related to Pivotal LNG being met by Dominion Modular LNG Holdings, Inc. after the completion of the sale. Based on the terms of these pending transactions, Southern Company Gas recorded an asset impairment charge, exclusive of the contingent payments, for Pivotal LNG of

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

approximately $24 million ($17 million after tax) as of December 31, 2019. The completion of each transaction is subject to the satisfaction or waiver of certain conditions, including, among other customary closing conditions, the completion of the other transaction and, for the sale of the interest in Atlantic Coast Pipeline, the expiration or termination of any applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. The transactions are expected to be completed in the first half of 2020; however, the ultimate outcome cannot be determined at this time. The assets and liabilities of Pivotal LNG and the interest in Atlantic Coast Pipeline are classified as held for sale as of December 31, 2019. See Notes 3 and 7 under "Southern Company Gas – Gas Pipeline Projects" and "Southern Company Gas – Equity Method Investments," respectively, and "Assets Held for Sale" herein for additional information.
Assets Held for Sale
As discussed previously, Southern Company, Southern Power, and Southern Company Gas each have assets and liabilities held for sale on their balance sheets at December 31, 2019 and/or 2018. Assets and liabilities held for sale have been classified separately on each company's balance sheet at the lower of carrying value or fair value less costs to sell at the time the criteria for held-for-sale classification were met. For assets and liabilities held for sale recorded at fair value on a nonrecurring basis, the fair value of assets and liabilities subject to rate regulation that allows recovery of costs and/or a fair return on investments, historical cost was deemed to be a reasonable proxy for fair value, as it is included in rate base or otherwise specified in regulatory recovery mechanisms. Property, plant, and equipment subject to rate regulation was reflected based on the historical gross amount of assets in service and accumulated depreciation, as they are included in rate base. For certain assets and liabilities subject to rate regulation (such as debt instruments and employee benefit obligations), the fair value adjustment was applied to historical cost with a corresponding offset to regulatory asset or liability based on the assessment of probable future recovery in rates.
For unregulated assets and liabilities, fair value adjustments were applied to historical cost of natural gasheld for sale property, plant, and equipment, debt instruments, and noncontrolling interest. The valuation of other intangible assets included customer relationships, trade names, and favorable/unfavorable contracts. The valuation of these assets and liabilities applied either the market approach or income approach. The market approach was utilized when prices and other relevant market information were available. The income approach, which is based on discounted cash flows, was primarily based on significant unobservable inputs (Level 3). Key estimates, which includes the agreed upon sales prices in executed sales agreements.
Since the depreciation of the assets sold in the Gulf Power transaction and inputs included forecasted profitabilitySouthern Company Gas' Elizabethtown Gas, Elkton Gas, and cash flows,Florida City Gas transactions continued to be reflected in customer retention rates royalty rates,through the closing date of each sale and discount rates.
The estimated fair value of deferred income taxes was determined by applyingreflected in the appropriate enacted statutory tax rate to the temporary differences that arose on the differences between the financial reporting value and taxcarryover basis of the assets acquiredwhen sold, Southern Company and liabilities assumed.

NOTES (continued)
Southern Company Gas continued to record depreciation on those assets through the respective closing date of each transaction. Upon classification as held for sale in May 2018 for the Florida Plants, November 2018 for Plant Mankato, and Subsidiary Companies 2016 Annual Report


April 2019 for Plant Nacogdoches, Southern Power ceased recognizing depreciation and amortization on the long-lived assets being sold.
The excess offollowing table provides the purchase price over the estimated fair valuemajor classes of assets and liabilities of $6.0 billion was recognizedclassified as goodwill, which is primarily attributable to positioningheld for sale for Southern Company, to provide natural gas infrastructure to meet customers' growing energy needsSouthern Power, and to compete for growth across the energy value chain. TheSouthern Company anticipatesGas at December 31, 2019 and/or 2018:
 
Southern
Company
 
Southern
Power
 Southern Company Gas
 At December 31, At December 31, At December 31,
 20192018 20192018 2019
 (in millions) (in millions) (in millions)
Assets Held for Sale:       
Current assets$19
$393
 $17
$8
 $2
Total property, plant, and equipment565
4,583
 547
536
 18
Goodwill and other intangible assets40
40
 40
40
 
Equity investments in unconsolidated subsidiaries151

 

 151
Other non-current assets14
727
 14

 
Total Assets Held for Sale$789
$5,743
 $618
$584
 $171
        
Liabilities Held for Sale:       
Current liabilities$5
$425
 $3
$15
 $2
Long-term debt
1,286
 

 
Accumulated deferred income taxes
618
 

 
Other non-current liabilities
932
 

 
Total Liabilities Held for Sale$5
$3,261
 $3
$15
 $2

Southern Company, Southern Power, and Southern Company Gas each concluded that the majorityasset sales, both individually and combined, did not represent a strategic shift in operations that has, or is expected to have, a major effect on its operations and financial results; therefore, none of the value assignedassets related to goodwill will not be deductiblethe sales have been classified as discontinued operations for tax purposes.any of the periods presented.
The Company's results

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Gulf Power and Southern Power's Florida Plants, Plant Nacogdoches, and Plant Mankato represented individually significant components of Southern Company and Southern Power, respectively; therefore, pre-tax income for these components for the successor period of July 1, 2016 through December 31, 2016 include a $20 million decrease in consolidated earnings comprised of $17 million of reduced revenues and $22 million of increased amortization, partially offset by lower interest expense of $19 million, as a result of the fair value adjustment of assets and liabilities in the application of acquisition accounting. Transaction costs included $18 million in rate credits provided to the customers of Elizabethtown Gas and Elkton Gas as a condition of the Merger, $3 million for financial advisory fees, legal expenses, and other Merger-related costs, including certain amounts payable upon successful completion of the Merger, and $20 million for additional compensation-related expenses, including accelerated vesting of share-based compensation expenses and change-in-control compensation charges.
During the predecessor period of January 1, 2016 through June 30, 2016, the Company recorded in its statements of income transaction costs of $56 million. Transaction costs included $31 million for financial advisory fees, legal expenses, and other Merger-related costs, including certain amounts payable upon successful completion of the Merger, which was deemed probable on June 29, 2016, and $25 million of additional compensation related expenses, including accelerated vesting of share-based compensation expenses and certain Merger-related compensation charges. The Company recorded Merger-related expenses of $44 million for the predecessor yearyears ended December 31, 2015. The Company previously treated these costs as tax deductible since the requisite closing conditions to the Merger had not yet been satisfied. During the second quarter 2016, when the Merger became probable, the Company re-evaluated the tax deductibility of these costs2019, 2018, and reflected any non-deductible amounts in the effective tax rate.2017 are presented below:
The receipt of required regulatory approvals was conditioned upon certain terms and commitments. In connection with these regulatory approvals, certain regulatory agencies prohibited the Company from recovering goodwill and Merger-related expenses, required the Company to maintain a minimum number of employees for a set period of time to ensure that certain pipeline safety standards and the competence level of the employee workforce is not degraded, and/or required the Company to maintain its pre-Merger level of support for various social and charitable programs. The most notable terms and commitments with potential financial impacts included:
rate credits of $18 million to be paid to customers in New Jersey and Maryland;
 201920182017
 (in millions)
Earnings before income taxes:(a)
   
Gulf PowerN/A
$140
$229
Southern Power's Florida Plants(b)
N/A
$49
$37
Southern Power's Plant Nacogdoches(c)
$13
$27
$25
Southern Power's Plant Mankato$29
N/M
N/M
sharing of Merger savings with customers in Georgia starting in 2020;N/M - Not material
(a)Earnings before income taxes for Southern Power's components reflect the cessation of depreciation and amortization on the long-lived assets being sold upon classification as held for sale.
(b)Earnings before income taxes for the Florida Plants in 2018 represents the period from January 1, 2018 to December 4, 2018 (the divestiture date).
(c)Earnings before income taxes for Plant Nacogdoches in 2019 represents January 1, 2019 through June 13, 2019 (the divestiture date).
phasing-out the use of the Nicor name or logo by certain of the Company's gas marketing services subsidiaries in conducting non-utility business in Illinois;
reaffirming that Elizabethtown Gas would file a base rate case no later than September 1, 2016, with another base rate case no later than three years after the 2016 rate case; and
requiring Elkton Gas to file a base rate case within two years of closing the Merger.
There is no restriction on the Company's other utilities' ability to file future rate cases. The rate credits to customers in New Jersey and Maryland were paid during the third and fourth quarters of 2016, respectively, and Elizabethtown Gas filed a base rate case with the New Jersey BPU on September 1, 2016. Upon completion of the Merger, the Company amended and restated its Bylaws and Articles of Incorporation, under which it now has the authority to issue no more than 110 million shares of stock consisting of (i) 100 million shares of common stock and (ii) 10 million shares of preferred stock, both categories of which have a par value of $0.01 per share. The amended and restated Articles of Incorporation do not allow any treasury shares to be held.
Investment in SNG
On September 1, 2016, the Company, through a wholly-owned, indirect subsidiary, acquired a 50% equity interest in SNG pursuant to a definitive agreement between Southern Company and Kinder Morgan, Inc. on July 10, 2016, to which Southern Company assigned all rights and obligations to the Company on August 31, 2016. SNG owns a 7,000-mile pipeline system connecting natural gas supply basins in Texas, Louisiana, Mississippi, and Alabama to markets in Louisiana, Mississippi, Alabama, Florida, Georgia, South Carolina, and Tennessee. The purchase price of $1.4 billion was financed by a $1.05 billion equity contribution from Southern Company and $360 million of cash paid by the Company, which was financed by a promissory note from Southern Company and repaid with a portion of the proceeds from the senior notes issued in September 2016. The purchase price of the 50% equity interest exceeded the underlying ownership interest in the net assets of SNG by approximately $700 million. This basis difference is attributable to goodwill and deferred tax assets. While the deferred tax assets will be amortized through deferred tax expense, the goodwill will not be amortized and is not required to be tested for impairment on an annual basis. See Note 4 under "Equity Method Investments" for additional information on this investment.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


12.16. SEGMENT AND RELATED INFORMATION
Southern Company
Southern Company's reportable business segments are the sale of electricity by the traditional electric operating companies, the sale of electricity in the competitive wholesale market by Southern Power, and the sale of natural gas and other complementary products and services by Southern Company Gas. Revenues from sales by Southern Power to the traditional electric operating companies were $398 million, $435 million, and $392 million in 2019, 2018, and 2017, respectively. Revenues from sales of natural gas from Southern Company Gas to the traditional electric operating companies and Southern Power were $14 million and $64 million, respectively, in 2019, $32 million and $119 million, respectively, in 2018, and $23 million and $119 million, respectively, in 2017. The "All Other" column includes the Southern Company parent entity, which does not allocate operating expenses to business segments. Also, this category includes segments below the quantitative threshold for separate disclosure. These segments include providing energy solutions to electric utilities and their customers in the areas of distributed generation, energy storage and renewables, and energy efficiency, as well as investments in telecommunications and leveraged lease projects. All other inter-segment revenues are not material.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Financial data for business segments and products and services for the years ended December 31, 2019, 2018, and 2017 was as follows:
 Electric Utilities    
 
Traditional
Electric
Operating
Companies
Southern
Power
EliminationsTotalSouthern Company Gas
All
Other
EliminationsConsolidated
 (in millions)
2019        
Operating revenues$15,569
$1,938
$(412)$17,095
$3,792
$690
$(158)$21,419
Depreciation and amortization1,993
479

2,472
487
79

3,038
Interest income38
9

47
3
16
(6)60
Earnings from equity method investments2
3

5
157


162
Interest expense818
169

987
232
517

1,736
Income taxes (benefit)764
(56)
708
130
960

1,798
Segment net income (loss)(a)(b)(c)(d)(e)
2,929
339

3,268
585
908
(22)4,739
Goodwill
2

2
5,015
263

5,280
Total assets81,063
14,300
(713)94,650
21,687
3,511
(1,148)118,700
Gross property additions5,748
489

6,237
1,418
159

7,814
2018        
Operating revenues$16,843
$2,205
$(477)$18,571
$3,909
$1,213
$(198)$23,495
Depreciation and amortization2,072
493

2,565
500
66

3,131
Interest income23
8

31
4
8
(5)38
Earnings from equity method investments(1)

(1)148
2
(1)148
Interest expense852
183

1,035
228
580
(1)1,842
Income taxes (benefit)371
(164)
207
464
(222)
449
Segment net income (loss)(a)(b)(f)(g)
2,117
187

2,304
372
(453)3
2,226
Goodwill
2

2
5,015
298

5,315
Total assets79,382
14,883
(306)93,959
21,448
3,285
(1,778)116,914
Gross property additions6,077
315

6,392
1,399
414

8,205
2017        
Operating revenues$16,884
$2,075
$(419)$18,540
$3,920
$741
$(170)$23,031
Depreciation and amortization1,954
503

2,457
501
52

3,010
Interest income14
7

21
3
11
(9)26
Earnings from equity method investments1


1
106
(1)
106
Interest expense820
191

1,011
200
490
(7)1,694
Income taxes (benefit)1,021
(939)
82
367
(307)
142
Segment net income (loss)(a)(b)(h)(i)
(193)1,071

878
243
(279)
842
Goodwill
2

2
5,967
299

6,268
Total assets72,204
15,206
(325)87,085
22,987
2,552
(1,619)111,005
Gross property additions3,836
268

4,104
1,525
355

5,984

(a)Attributable to Southern Company.
(b)
Segment net income (loss) for the traditional electric operating companies includes pre-tax charges for estimated losses on plants under construction of $24 million ($24 million after tax) in 2019, $1.1 billion ($722 million after tax) in 2018, and $3.4 billion ($2.4 billion after tax) in 2017. See Note 2 under "Georgia PowerNuclear Construction" and "Mississippi PowerKemper County Energy FacilitySchedule and Cost Estimate" for additional information.
(c)Segment net income (loss) for Southern Power includes a $23 million pre-tax gain ($88 million gain after tax) on the sale of Plant Nacogdoches in 2019. See Note 15 under "Southern Power" for additional information.
(d)
Segment net income (loss) for Southern Company Gas in 2019 includes pre-tax impairment charges totaling $115 million ($86 million after tax). See Notes 3 and 15 under "Other MattersSouthern Company Gas" and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.
(e)
Segment net income (loss) for the "All Other" column in 2019 includes the pre-tax gain associated with the sale of Gulf Power of $2.6 billion ($1.4 billion after tax), the pre-tax loss, including related impairment charges, on the sales of certain PowerSecure business units totaling $58 million ($52 million after tax), and a pre-tax impairment charge of $17 million ($13 million after tax) related to a leveraged lease investment. See Notes 3 and 15 under "Other MattersSouthern Company" and "Southern Company," respectively, for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

(f)
Segment net income (loss) for Southern Power includes pre-tax impairment charges of $156 million ($117 million after tax) in 2018. See Note 15 under "Southern Power" for additional information.
(g)
Segment net income (loss) for Southern Company Gas includes a net gain on dispositions of $291 million ($51 million loss after tax) in 2018 related to the Southern Company Gas Dispositions and a goodwill impairment charge of $42 million in 2018 related to the sale of Pivotal Home Solutions. See Note 15 under "Southern Company Gas" for additional information.
(h)
Segment net income (loss) for the traditional electric operating companies includes a pre-tax charge for the write-down of Gulf Power's ownership of Plant Scherer Unit 3 of $33 million ($20 million after tax) in 2017. See Note 2 under "Southern CompanyGulf Power" for additional information.
(i)
Segment net income (loss) includes income tax expense of $367 million for the traditional electric operating companies, income tax benefit of $743 million for Southern Power, and income tax expense of $93 million for Southern Company Gas in 2017 related to the Tax Reform Legislation.
Products and Services
Electric Utilities' Revenues
YearRetail Wholesale Other Total
 (in millions)
2019$14,084
 $2,152
 $859
 $17,095
201815,222
 2,516
 833
 18,571
201715,330
 2,426
 784
 18,540
Southern Company Gas' Revenues
YearGas
Distribution
Operations
 Gas
Marketing
Services
 All Other Total
 (in millions)
2019$3,001
 $456
 $335
 $3,792
20183,155
 568
 186
 3,909
20173,024
 860
 36
 3,920

Southern Company Gas
Southern Company Gas manages its business through four4 reportable segments - gas distribution operations, (formerly referred to as distribution operations), gas marketing services (formerly referred to as retail operations),pipeline investments, wholesale gas services, (formerly referred to as wholesale services), and gas midstream operations (formerly referred to as midstream operations).marketing services. The non-reportable segments are combined and presented as all other. In conjunction with the Merger, theDuring 2018, Southern Company Gas changed the names of certainits reportable segments to betterfurther align withthe way its Chief Operating Decision Maker reviews operating results and reclassified prior year data to conform to the new parent company.reportable segment presentation. This change resulted in a new reportable segment, gas pipeline investments, which was formerly included in gas midstream operations.
Gas distribution operations is the largest component of the Company'sSouthern Company Gas' business and includes natural gas local distribution utilities that construct, manage, and maintain intrastate natural gas pipelines and gas distribution facilities in seven4 states. In July 2018, Southern Company Gas marketing services includessold 3 of its natural gas marketingdistribution utilities, Elizabethtown Gas, Elkton Gas, and Florida City Gas. See Note 15 under "Southern Company Gas" for additional information.
Gas pipeline investments consists of joint ventures in natural gas pipeline investments including a 50% interest in SNG, 2 significant pipeline construction projects, and a 50% joint ownership interest in the Dalton Pipeline. These natural gas pipelines enable the provision of diverse sources of natural gas supplies to end-usethe customers primarily in Georgiaof Southern Company Gas. See Notes 3, 5, 7, and Illinois. Additionally, gas marketing services provides home equipment protection products and services. 15 for additional information.
Wholesale gas services provides natural gas asset management and/or related logistics services for each of the Company'sSouthern Company Gas' utilities except Nicor Gas as well as for non-affiliated companies. Additionally, this segmentwholesale gas services engages in natural gas storage and gas pipeline arbitrage and related activities. Since the acquisition
Gas marketing services provides natural gas marketing to end-use customers primarily in Georgia and Illinois through SouthStar. In June 2018, Southern Company Gas sold Pivotal Home Solutions, which provided home equipment protection products and services. See Note 15 under "Southern Company GasSale of the Company's 50% interest in SNG, gas midstream operations primarily consists of the Company's gas pipeline investments, with storage and fuel operations also aggregated into this segment. Pivotal Home Solutions" for additional information.
The all other column includes segments below the quantitative threshold for separate disclosure, including storage and fuels operations, Pivotal LNG, the investment in Triton through its sale on May 29, 2019, and other subsidiaries that fall below the quantitative threshold for separate disclosure. See Note 15 under "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline" for additional information.
After the Merger, the

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company changed the segment performance measure to net income, which is utilized by its new parent company. In order to properly assess net income by segment, the Company executed various intercompany note agreements to revise interest charges to its segments. Since such agreements did not exist in the predecessor periods, the Company is unable to provide the comparable net income for those periods.and Subsidiary Companies 2019 Annual Report

Financial data for business segments for the successor period of July 1, 2016 through December 31, 2016 and for the predecessor periods of January 1, 2016 through June 30, 2016 and the years ended December 31, 20152019, 2018, and 2014 were2017 was as follows:
 Gas Distribution Operations Gas Marketing Services 
Wholesale Gas Services(*)
 Gas Midstream Operations Total All Other Eliminations Consolidated
 (in millions)
Successor – July 1, 2016 through December 31, 2016          
Operating revenues$1,342
 $354
 $24
 $31
 $1,751
 $3
 $(102) $1,652
Depreciation and
amortization
185
 35
 1
 9
 230
 8
 
 238
Earnings from equity
method investments

 
 
 58
 58
 2
 
 60
Interest expense(105) (1) (3) (16) (125) 44
 
 (81)
Income taxes51
 7
 (3) 16
 71
 5
 
 76
Segment net income
(loss)
77
 19
 
 20
 116
 (2) 
 114
Gross property
additions
561
 5
 1
 54
 621
 11
 
 632
Successor – Total
assets at
December 31, 2016
19,453
 2,084
 1,127
 2,211
 24,875
 11,145
 (14,167) 21,853
 
Gas Distribution Operations(a)(b)
Gas Pipeline Investments
Wholesale Gas Services(c)
Gas Marketing Services(b)(d)
Total
All Other(e)
EliminationsConsolidated
 (in millions)
2019     
Operating revenues$3,028
$32
$294
$456
$3,810
$44
$(62)$3,792
Depreciation and amortization422
5
1
26
454
33

487
Operating income (loss)573
20
219
112
924
(154)
770
Earnings from equity method investments
162


162
(5)
157
Interest expense(187)(30)(5)(3)(225)(7)
(232)
Income taxes (benefit)63
58
52
27
200
(70)
130
Segment net income (loss)337
94
163
83
677
(92)
585
Gross property additions1,433
1
1
4
1,439
27

1,466
Total assets at December 31, 201918,204
1,678
850
1,496
22,228
10,759
(11,300)21,687
2018     
Operating revenues$3,186
$32
$144
$568
$3,930
$55
$(76)$3,909
Depreciation and amortization409
5
2
37
453
47

500
Operating income (loss)904
20
70
19
1,013
(98)
915
Earnings from equity method investments
145


145
3

148
Interest expense(178)(34)(9)(6)(227)(1)
(228)
Income taxes (benefit)409
28
4
54
495
(31)
464
Segment net income (loss)334
103
38
(40)435
(63)
372
Gross property additions1,429
32

6
1,467
54

1,521
Total assets at December 31, 201817,266
1,763
1,302
1,587
21,918
11,112
(11,582)21,448
2017     
Operating revenues$3,207
$17
$6
$860
$4,090
$64
$(234)$3,920
Depreciation and amortization391
2
2
62
457
44

501
Operating income (loss)645
10
(51)113
717
(57)
660
Earnings from equity method investments
103


103
3

106
Interest expense(153)(26)(7)(5)(191)(9)
(200)
Income taxes(f)
178
109

24
311
56

367
Segment net income (loss)(f)
353
(22)(57)84
358
(115)
243
Gross property additions1,330
117
1
9
1,457
51

1,508
Total assets at December 31, 201719,358
1,699
1,096
2,147
24,300
12,726
(14,039)22,987
(*)(a)
Operating revenues for the 3 gas distribution operations dispositions were $244 million and $399 million for 2018 and 2017, respectively. See Note 15 under "Southern Company Gas" for additional information.
(b)
Segment net income for gas distribution operations includes a gain on dispositions of $324 million ($16 million after tax) in 2018. Segment net income for gas marketing services includes a loss on disposition of $(33) million ($(67) million loss after tax) and a goodwill impairment charge of $42 million in 2018 recorded in contemplation of the sale of Pivotal Home Solutions. See Note 15 under "Southern Company Gas" for additional information.
(c)The revenues for wholesale gas services are netted with costs associated with its energy and risk management activities. A reconciliation of operating revenues and intercompany revenues is shown in the following table.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



 Third Party Gross RevenuesIntercompany RevenuesTotal Gross RevenuesLess Gross Gas CostsOperating Revenues
 (in millions)
2019$5,703
$275
$5,978
$5,684
$294
20186,955
451
7,406
7,262
144
20176,152
481
6,633
6,627
6
 Gas Distribution Operations Gas Marketing Services 
Wholesale Gas Services(*)
 Gas Midstream Operations Total All Other Eliminations Consolidated
 (in millions)
Predecessor – January 1, 2016 through June 30, 2016          
Operating revenues$1,575
 $435
 $(32) $25
 $2,003
 $4
 $(102) $1,905
Depreciation and
 amortization
178
 11
 1
 9
 199
 7
 
 206
EBIT353
 109
 (68) (6) 388
 (60) 
 328
Gross property additions484
 4
 1
 43
 532
 16
 
 548
Predecessor – Year Ended December 31, 2015   
     
Operating revenues$3,049
 $835
 $202
 $55
 $4,141
 $11
 $(211) $3,941
Depreciation and
 amortization
336
 25
 1
 18
 380
 17
 
 397
EBIT581
 152
 110
 (23) 820
 (59) 
 761
Gross property additions957
 7
 2
 27
 993
 34
 
 1,027
Predecessor – Total
assets at
December 31, 2015
12,519
 686
 935
 692
 14,832
 9,662
 (9,740) 14,754
Predecessor – Year Ended December 31, 2014   
     
Operating revenues$4,001
 $994
 $578
 $88
 5,661
 $7
 $(283) $5,385
Depreciation and
 amortization
317
 28
 1
 18
 364
 16
 
 380
EBIT582
 132
 425
 (17) 1,122
 (10) 
 1,112
Gross property additions715
 11
 2
 15
 743
 26
 
 769
Predecessor – Total
assets at
December 31, 2014
12,038
 670
 1,402
 694
 14,804
 9,705
 (9,647) 14,862

(*)(d)The
Operating revenues for wholesalethe gas marketing services are netted with costs associated with its energydisposition were $55 million and risk management activities. A reconciliation of operating revenues$129 million in 2018 and intercompany revenues is shown in the following table.2017, respectively. See Note 15 under "Southern Company Gas" for additional information.
 Third Party Gross Revenues Intercompany Revenues Total Gross Revenues Less Gross Gas Costs Operating Revenues
 (in millions)
Successor – July 1, 2016 through
December 31, 2016
$5,807
 $333
 $6,140
 $6,116
 $24
 (in millions)
Predecessor – January 1, 2016 through
June 30, 2016
$2,500
 $143
 $2,643
 $2,675
 $(32)
Year Ended December 31, 20156,286
 408
 6,694
 6,492
 202
Year Ended December 31, 201410,709
 718
 11,427
 10,849
 578
13. DISCONTINUED OPERATIONS
In 2014, the Company sold Tropical Shipping, which was previously reported as its own segment, to an unrelated third party. The after-tax cash proceeds and distributions from the transaction were approximately $225 million. The Company determined that the cumulative foreign earnings of Tropical Shipping would no longer be indefinitely reinvested offshore. Accordingly, the Company recognized income tax expense of $60 million, of which $31 million was recorded in the first quarter 2014, and the remaining $29 million was recorded in the third quarter 2014 related to the cumulative foreign earnings for which no tax liabilities had been previously recorded, resulting in the repatriation of $86 million in cash.

NOTES (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report


During 2014, based upon the negotiated sales price, the Company recorded a non-cash goodwill impairment charge of $19 million, for which there was no income tax benefit. Additionally, the Company recognized a total charge of $7 million in 2014 related to the suspension of depreciation and amortization on assets for which the Company was not compensated by the buyer.
The components of discontinued operations recorded on the statements of income for the predecessor year ended December 31, 2014 are as follows:
 Year Ended December 31, 2014
 (in millions)
Operating revenues$243
Operating expenses 
Cost of goods sold149
Operation and maintenance75
Depreciation and amortization5
Taxes other than income taxes5
Loss on sale and goodwill impairment(*)
28
Total operating expenses262
Operating (loss) income(19)
(Loss) income before income taxes(19)
Income tax expense(61)
(Loss) income from discontinued operations, net of tax$(80)
(*)(e)Primarily reflects $7
Segment net income (loss) for the "All Other" column in 2019 includes pre-tax impairment charges totaling $115 million due to the suspension($86 million after tax). See Notes 3 and 15 under "Other MattersSouthern Company Gas" and "Southern Company GasProposed Sale of depreciationPivotal LNG and amortization during 2014 and $19 million of goodwill attributable to Tropical Shipping that was impaired in 2014, based on the negotiated sales price.Atlantic Coast Pipeline," respectively, for additional information.
(f)Includes the impact of the Tax Reform Legislation and new income tax apportionment factors in several states resulting from Southern Company Gas' inclusion in the consolidated Southern Company state tax filings.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company Gas and Subsidiary Companies 20162019 Annual Report



14. CAPITALIZATION17. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
The capitalizationtables below provide summarized quarterly financial information for the years ended December 31, 2016each Registrant for 2019 and 2015 are as follows:2018. Each Registrant's business is influenced by seasonal weather conditions.
 Successor  Predecessor Successor  Predecessor
 2016  2015 2016  2015
 (in millions)  (in millions) (percent of total)  (percent of total)
Long-Term Debt:         
Long-term notes payable —         
1.47% to 9.10% due 2016-2046(a)
$3,887
  $3,181
     
Other long-term debt —         
First mortgage bonds —         
2.66% to 6.58% due 2016-2038(b)
625
  375
     
Gas facility revenue bonds —         
Variable rate (1.28% at 1/1/17) due 2022-2033200
  200
     
Total other long-term debt825
  575
     
Unamortized fair value adjustment of long-term debt578
  68
     
Unamortized debt discount(9)  (4)     
Total long-term debt (annual interest requirement — $207 million)5,281
  3,820
     
Less amount due within one year22
  545
     
Long-term debt excluding amount due within one year5,259
  3,275
 36.6%  45.2%
Common Stockholder's Equity:         
Common stock — 2016: par value $0.01 per share         
    — 2015 par value $5 per share         
Authorized — 2016: 100 million shares         
— 2015: 750 million shares         
Outstanding — 2016: 100 shares         
  — 2015: 120.4 million shares         
Treasury — 2016: no shares         
                       — 2015: 0.2 million shares         
Paid-in capital9,095
  2,702
     
Treasury, at cost
  (8)     
Retained earnings (accumulated deficit)(12)  1,421
     
Accumulated other comprehensive income (loss)26
  (186)     
Total common stockholder's equity9,109
  3,929
 63.4
  54.2
Noncontrolling interest
  46
 
  0.6
Total stockholders' equity9,109
  3,975
     
Total Capitalization$14,368
  $7,250
 100.0%  100.0%
Quarter Ended
Southern Company(a)
Alabama Power
Georgia
Power
Mississippi Power(b)
Southern Power(c)
Southern Company Gas(d)
 (in millions)
March 2019      
Operating Revenues$5,412
$1,408
$1,833
$287
$443
$1,474
Operating Income (Loss)3,691
338
448
56
60
353
Net Income (Loss)2,059
217
311
37
27
270
Net Income (Loss) Attributable to Registrant2,084
217
311
37
56
270
       
June 2019      
Operating Revenues$5,098
$1,513
$2,117
$313
$510
$689
Operating Income (Loss)1,342
445
647
54
153
134
Net Income (Loss)931
296
448
37
203
106
Net Income (Loss) Attributable to Registrant899
296
448
37
174
106
       
September 2019      
Operating Revenues$5,995
$1,841
$2,755
$370
$574
$498
Operating Income (Loss)2,013
676
1,161
93
167
(35)
Net Income (Loss)1,345
469
839
65
111
(29)
Net Income (Loss) Attributable to Registrant1,316
469
839
65
86
(29)
       
December 2019      
Operating Revenues$4,914
$1,363
$1,703
$294
$411
$1,131
Operating Income (Loss)690
134
205
22
15
318
Net Income (Loss)409
88
122

(12)238
Net Income (Loss) Attributable to Registrant440
88
122

23
238
(a)
Long-term notes payable maturities are as follows: $22Southern Company recorded a preliminary pre-tax gain associated with the sale of Gulf Power of $2.5 billion ($1.3 billion after tax) in the first quarter 2019 and recorded subsequent adjustments of $(15) million ($(11) million after tax) in the second quarter 2019, $4 million ($4 million after tax) in the third quarter 2019, and $70 million ($102 million after tax) in the fourth quarter 2019. In addition, Southern Company recorded a pre-tax loss, including related impairment charges, on the sales of certain PowerSecure business units totaling $32 million in 2017 (7.20%); $155the second quarter 2019, $14 million in 2018 (3.50%); $300($15 million after tax) in the third quarter 2019, (5.25%); $330 and $12 million ($5 million after tax) in 2021 (3.50% the fourth quarter 2019, as well as a pre-tax impairment charge of $17 million ($13 million after tax) in the fourth quarter 2019 related to 9.10%);a leveraged lease investment. See Notes 3 and $3.1 billion in 2022-2046 (2.45% to 8.70%).15 under "Other MattersSouthern Company" and "Southern Company," respectively, for additional information. Also see notes (b), (c), and (d) below.
(b)
First mortgage bonds maturities areMississippi Power recorded total pre-tax charges to income of $2 million ($1 million after tax) in the first quarter 2019, $4 million ($3 million after tax) in the second quarter 2019, $4 million ($3 million after tax) in the third quarter 2019, and $14 million ($17 million after tax) in the fourth quarter 2019 as follows: $50 million in 2019 (4.70%)a result of abandonment and $575 million in 2023-2038 (2.66%related closure costs and ongoing period costs, net of salvage proceeds, for the mine and gasifier-related assets at the Kemper County energy facility. The fourth quarter charges include impacts associated with the expected close out of a DOE contract related to 6.58%).the Kemper County energy facility, as well as an adjustment related to the tax abandonment of the Kemper IGCC following the filing of the 2018 tax return. See Note 2 under "Mississippi PowerKemper County Energy Facility" for additional information.
(c)
Southern Power recorded a pre-tax gain of $23 million ($88 million gain after tax) in the second quarter 2019 on the sale of Plant Nacogdoches. See Note 15 under "Southern Power" for additional information.
(d)
Southern Company Gas recorded pre-tax impairment charges of $92 million ($65 million after tax) in the third quarter 2019, and a subsequent adjustment of $(1) million ($4 million after tax) in the fourth quarter 2019, related to a natural gas storage facility in Louisiana and $24 million ($17 million after tax) in the fourth quarter 2019 in contemplation of the sale of its interests in Pivotal LNG and Atlantic Coast Pipeline. See Notes 3 and 15 under "Other MattersSouthern Company Gas" and "Southern Company GasProposed Sale of Pivotal LNG and Atlantic Coast Pipeline," respectively, for additional information.


COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

Quarter Ended
Southern
  Company(a)
Alabama Power
Georgia
Power(b)
Mississippi Power(c)
Southern Power(d)
Southern Company Gas(e)
 (in millions)
March 2018      
Operating Revenues$6,372
$1,473
$1,961
$302
$509
$1,639
Operating Income (Loss)1,376
372
513
7
60
388
Net Income (Loss)936
225
352
(7)115
279
Net Income (Loss) Attributable to Registrant938
225
352
(7)121
279
       
June 2018      
Operating Revenues$5,627
$1,503
$2,048
$297
$555
$730
Operating Income (Loss)63
380
(472)54
16
49
Net Income (Loss)(127)259
(396)46
45
(31)
Net Income (Loss) Attributable to Registrant(154)259
(396)46
22
(31)
       
September 2018      
Operating Revenues$6,159
$1,740
$2,593
$358
$635
$492
Operating Income (Loss)2,174
561
991
80
136
374
Net Income (Loss)1,222
373
664
47
146
46
Net Income (Loss) Attributable to Registrant1,164
373
664
47
92
46
       
December 2018      
Operating Revenues$5,337
$1,316
$1,818
$308
$506
$1,048
Operating Income (Loss)578
164
257
52
30
104
Net Income (Loss)269
73
173
149
(60)78
Net Income (Loss) Attributable to Registrant278
73
173
149
(48)78
(a)See notes (b), (c), (d), and (e) below.
(b)
Georgia Power recorded an estimated probable loss of $1.1 billion in the second quarter 2018 to reflect its revised estimate to complete construction and start-up of Plant Vogtle Units 3 and 4. See Note 2 under "Georgia PowerNuclear Construction" for additional information.
(c)
As a result of the abandonment and related closure activities for the mine and gasifier-related assets at the Kemper County energy facility, Mississippi Power recorded total pre-tax charges to income of $44 million ($33 million after tax) in the first quarter 2018, immaterial amounts in the second and third quarters 2018, and a pre-tax credit to income of $9 million in the fourth quarter 2018. In addition, Mississippi Power recorded a credit to earnings of $95 million in the fourth quarter 2018 primarily resulting from the reduction of a valuation allowance for a state income tax NOL carryforward associated with the Kemper County energy facility. See Note 2 under "Mississippi PowerKemper County Energy Facility" and Note 10 for additional information.
(d)
Southern Power recorded pre-tax impairment charges of $119 million ($89 million after tax) in the second quarter 2018 in contemplation of the sale of the Florida Plants and $36 million ($27 million after tax) in the third quarter 2018 related to wind turbine equipment. See Note 15 under "Southern PowerSales of Natural Gas and Biomass Plants" and " – Development Projects" for additional information. As a result of the Tax Reform Legislation, Southern Power recorded income tax expense of $75 million in the fourth quarter 2018. See Note 10 for additional information.
(e)
Southern Company Gas recorded a goodwill impairment charge of $42 million in the first quarter 2018 in contemplation of the sale of Pivotal Home Solutions. Southern Company Gas also recorded gains (losses) on dispositions in the second, third, and fourth quarters 2018 of $(36) million ($(76) million after tax), $353 million ($40 million after tax), and $(27) million ($(15) million after tax), respectively. See Note 15 under "Southern Company Gas" for additional information.

COMBINED NOTES TO FINANCIAL STATEMENTS (continued)
Southern Company and Subsidiary Companies 2019 Annual Report

The table below provides quarterly earnings per share financial information for Southern Company common stock for 2019 and 2018.
 
Earnings Per Common Share(*)
Quarter EndedBasic Diluted
    
March 2019$2.01
 $1.99
June 20190.86
 0.85
September 20191.26
 1.25
December 20190.42
 0.42
    
March 2018$0.93
 $0.92
June 2018(0.15) (0.15)
September 20181.14
 1.13
December 20180.27
 0.27
(*)See the notes below the two preceding tables for additional information.

Item 9.CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE
None.
Item 9A.CONTROLS AND PROCEDURES
Disclosure Controls and Procedures.
As of the end of the period covered by this Annual Report on Form 10-K, Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas conducted separate evaluations under the supervision and with the participation of each company's management, including the Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended). Based upon these evaluations, the Chief Executive Officer and the Chief Financial Officer, in each case, concluded that the disclosure controls and procedures are effective.
Internal Control Over Financial Reporting.
(a) Management's Annual Report on Internal Control Over Financial Reporting.
(b) Attestation Report of the Registered Public Accounting Firm.
The report of Deloitte & Touche LLP, Southern Company's independent registered public accounting firm, regarding Southern Company's Internal Control over Financial Reporting is included in Item 8 herein of this Form 10-K. This report is not applicable to Alabama Power, Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas as these companies are not accelerated filers or large accelerated filers.
(c) Changes in internal control over financial reporting.
There have been no changes in Southern Company's, Alabama Power's, Georgia Power's, Mississippi Power's, Southern Power's, or Southern Company Gas' internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended) during the fourth quarter 2019 that have materially affected or are reasonably likely to materially affect Southern Company's, Alabama Power's, Georgia Power's, Mississippi Power's, Southern Power's, or Southern Company Gas' internal control over financial reporting.
Item 9B.OTHER INFORMATION
None.

MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Company and Subsidiary Companies 2019 Annual Report
The management of Southern Company is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Company's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework(2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Company's internal control over financial reporting was effective as of December 31, 2019.
Deloitte & Touche LLP, as auditors of Southern Company's financial statements, has issued an attestation report on the effectiveness of Southern Company's internal control over financial reporting as of December 31, 2019, which is included herein.

/s/ Thomas A. Fanning
Thomas A. Fanning
Chairman, President, and Chief Executive Officer

/s/ Andrew W. Evans
Andrew W. Evans
Executive Vice President and Chief Financial Officer
February 19, 2020


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Alabama Power Company 2019 Annual Report
The management of Alabama Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Alabama Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Alabama Power's internal control over financial reporting was effective as of December 31, 2019.

/s/ Mark A. Crosswhite
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer

/s/ Philip C. Raymond
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
February 19, 2020


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Georgia Power Company 2019 Annual Report
The management of Georgia Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Georgia Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Georgia Power's internal control over financial reporting was effective as of December 31, 2019.

/s/ W. Paul Bowers
W. Paul Bowers
Chairman, President, and Chief Executive Officer

/s/ David P. Poroch
David P. Poroch
Executive Vice President, Chief Financial Officer, Treasurer, and Comptroller
February 19, 2020


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Mississippi Power Company 2019 Annual Report
The management of Mississippi Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Mississippi Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Mississippi Power's internal control over financial reporting was effective as of December 31, 2019.

/s/ Anthony L. Wilson
Anthony L. Wilson
Chairman, President, and Chief Executive Officer

/s/ Moses H. Feagin
Moses H. Feagin
Vice President, Chief Financial Officer, and Treasurer
February 19, 2020


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Power Company and Subsidiary Companies 2019 Annual Report
The management of Southern Power is responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Power's internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Power's internal control over financial reporting was effective as of December 31, 2019.

/s/ Mark S. Lantrip
Mark S. Lantrip
Chairman and Chief Executive Officer

/s/ Elliott L. Spencer
Elliott L. Spencer
Senior Vice President, Chief Financial Officer, and Treasurer
February 19, 2020


MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Southern Company Gas and Subsidiary Companies 20162019 Annual Report


15. QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
Summarized quarterly financial information for the successor periodThe management of July 1, 2016 through December 31, 2016 and for the predecessor periods of January 1, 2016 through June 30, 2016 and the year ended December 31, 2015 are as follows:
Quarter EndedOperating
Revenues
 Operating
Income (Loss)
 EBIT Net Income (Loss)
 (in millions)
Predecessor - January 1, 2016 through June 30, 2016      
March 2016$1,334
 $348
 $351
 $182
June 2016571
 (27) (23) (51)
Successor - July 1, 2016 through December 31, 2016      
September 2016$543
 $12
 $50
 $4
December 20161,109
 185
 221
 110
Predecessor - 2015       
March 2015$1,721
 $364
 $367
 $193
June 2015674
 107
 111
 42
September 2015584
 59
 62
 11
December 2015962
 216
 221
 107
The Company's business is influenced by seasonal weather conditions.

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2012-2016
Southern Company Gas and Subsidiary Companies 2016 Annual Report

 Successor  Predecessor
 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015 2014 2013 2012
Operating Revenues (in millions)$1,652
  $1,905
 $3,941
 $5,385
 $4,209
 $3,562
Income From Continuing
Operations (in millions)
$114
  $145
 $373
 $580
 $308
 $274
Net Income Attributable to
Southern Company Gas
(in millions)
$114
  $131
 $353
 $482
 $295
 $260
Cash Dividends on Common Stock
(in millions)
$126
  $128
 $244
 $233
 $222
 $203
Return on Average Common Equity
(percent)
1.74
  3.31
 9.05
 12.96
 8.42
 7.77
Total Assets (in millions)$21,853
  $14,488
 $14,754
 $14,888
 $14,528
 $14,051
Gross Property Additions
(in millions)
$632
  $548
 $1,027
 $769
 $731
 $775
Capitalization (in millions):            
Common stock equity$9,109
  $3,933
 $3,975
 $3,828
 $3,613
 $3,391
Long-term debt5,259
  3,709
 3,275
 3,581
 3,791
 3,307
Total (excluding amounts due within
one year)
$14,368
  $7,642
 $7,250
 $7,409
 $7,404
 $6,698
Capitalization Ratios (percent):            
Common stock equity63.4
  51.5
 54.8
 51.7
 48.8
 50.6
Long-term debt36.6
  48.5
 45.2
 48.3
 51.2
 49.4
Total (excluding amounts due within
one year)
100.0
  100.0
 100.0
 100.0
 100.0
 100.0
Service Contracts (year-end)1,198,263
  1,197,096
 1,205,476
 1,162,065
 1,176,908
 673,506
Customers (year-end)            
Gas distribution operations4,586,477
  4,544,489
 4,557,729
 4,529,114
 4,504,067
 4,477,986
Gas marketing services655,999
  630,475
 654,475
 633,460
 632,337
 608,711
Total (year-end)5,242,476
  5,174,964
 5,212,204
 5,162,574
 5,136,404
 5,086,697
Employees (year-end)5,292
  5,284
 5,203
 5,165
 6,094
 6,121

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA 2012-2016 (continued)
Southern Company Gas and Subsidiary Companies 2016 Annual Report
 Successor  Predecessor
 July 1, 2016 through December 31, 2016  January 1, 2016 through June 30, 2016 2015 2014 2013 2012
Operating Revenues (in millions)            
Residential$899
  $1,101
 $2,129
 $2,877
 $2,422
 $2,011
Commercial260
  310
 617
 861
 696
 656
Transportation269
  290
 526
 458
 487
 474
Industrial74
  72
 203
 242
 180
 262
Other150
  132
 466
 947
 424
 159
Total$1,652
  $1,905
 $3,941
 $5,385
 $4,209
 $3,562
Heating Degree Days:            
Illinois1,903
  3,340
 5,433
 6,556
 6,305
 4,863
Georgia727
  1,448
 2,204
 2,882
 2,689
 1,934
Gas Sales Volumes
(mmBtu in millions):
            
Gas distributions operations            
Firm274
  396
 695
 766
 720
 606
Interruptible47
  49
 99
 106
 111
 107
Total321
  445
 794
 872
 831
 713
Gas marketing services            
Firm:            
Georgia13
  21
 35
 41
 38
 31
Illinois4
  8
 13
 17
 9
 8
Other emerging markets5
  7
 11
 10
 8
 8
Interruptible (large commercial and
industrial)
6
  8
 14
 17
 18
 17
Total28
  44
 73
 85
 73
 64
Market share in Georgia (percent)29.4
  29.3
 29.7
 30.6
 31.4
 32.1
Wholesale gas services            
Daily physical sales (mmBtu in
millions/day
)
7.2
  7.6
 6.8
 6.3
 5.7
 5.5


PART III
Items 10, 11, 12 (other than the information under "Code of Ethics" below in Item 10), 13, and 14 for Southern Company are incorporated by reference to Southern Company's Definitive Proxy Statement relating to the 2017 Annual Meeting of Stockholders. Specifically, reference is made to "Corporate Governance at Southern Company" and "Section 16(a) Beneficial Ownership Reporting Compliance" for Item 10, "Compensation Discussion and Analysis," "Executive Compensation Tables," and "Director Compensation" for Item 11, "Stock Ownership Information" and "Executive Compensation Tables" for Item 12, "Southern Company Board" for Item 13, and "Principal Independent Registered Public Accounting Firm Fees" for Item 14.
Items 10, 11, 12 (other than the information under "Code of Ethics" below in Item 10), 13, and 14 for Alabama Power, Georgia Power, and Mississippi Power are incorporated by reference to the Definitive Information Statements of Alabama Power, Georgia Power, and Mississippi Power relating to each of their respective 2017 Annual Meetings of Shareholders. Specifically, reference is made to "Nominees for Election as Directors," "Corporate Governance," and "Section 16(a) Beneficial Ownership Reporting Compliance" for Item 10, "Executive Compensation," "Compensation Committee Interlocks and Insider Participation," "Director Compensation," "Director Deferred Compensation Plan," and "Director Compensation Table" for Item 11, "Stock Ownership Table" and "Executive Compensation" for Item 12, "Certain Relationships and Related Transactions" and "Director Independence" for Item 13, and "Principal Independent Registered Public Accounting Firm Fees" for Item 14.
Items 10, 11, 12, 13, and 14 for Gulf Power are contained herein.
Items 10, 11, 12, and 13 for each of Southern Power and Southern Company Gas are omitted pursuant to General Instruction I(2)(c) of Form 10-K. Item 14 for each of Southern Power and Southern Company Gas is contained herein.responsible for establishing and maintaining an adequate system of internal control over financial reporting as required by the Sarbanes-Oxley Act of 2002 and as defined in Exchange Act Rule 13a-15(f). A control system can provide only reasonable, not absolute, assurance that the objectives of the control system are met.
Under management's supervision, an evaluation of the design and effectiveness of Southern Company Gas' internal control over financial reporting was conducted based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Southern Company Gas' internal control over financial reporting was effective as of December 31, 2019.

/s/ Kimberly S. Greene
Kimberly S. Greene
Chairman, President, and Chief Executive Officer

/s/ Daniel S. Tucker
Daniel S. Tucker
Executive Vice President, Chief Financial Officer, and Treasurer
February 19, 2020

PART III
Items 10 (other than the information under "Code of Ethics" below), 11, 12, 13, and 14 for Southern Company are incorporated by reference to Southern Company's Definitive Proxy Statement relating to the 2020 Annual Meeting of Stockholders. Specifically, reference is made to "Corporate Governance at Southern Company" and "Delinquent Section 16(a) Reports," if required, for Item 10, "Compensation Discussion and Analysis," "Executive Compensation Tables," and "Director Compensation" for Item 11, "Stock Ownership Information," "Executive Compensation Tables," and "Equity Compensation Plan Information" for Item 12, "Southern Company Board" for Item 13, and "Principal Independent Registered Public Accounting Firm Fees" for Item 14.
Items 10 (other than the information under "Code of Ethics" below), 11, 12, 13, and 14 for Alabama Power are incorporated by reference to Alabama Power's Definitive Proxy Statement relating to its 2020 Annual Meeting of Shareholders. Specifically, reference is made to "Nominees for Election as Directors," "Corporate Governance," and "Delinquent Section 16(a) Reports," if required, for Item 10, "Executive Compensation," "Compensation Committee Interlocks and Insider Participation," "Director Compensation," "Director Deferred Compensation Plan," and "Director Compensation Table" for Item 11, "Stock Ownership Table" and "Executive Compensation" for Item 12, "Certain Relationships and Related Transactions" and "Director Independence" for Item 13, and "Principal Independent Registered Public Accounting Firm Fees" for Item 14.
Items 10, 11, 12, and 13 for each of Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas are omitted pursuant to General Instruction I(2)(c) of Form 10-K. Item 14 for each of Georgia Power, Mississippi Power, Southern Power, and Southern Company Gas is contained herein.
Item 10.DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
Identification of directors of Gulf Power (1)
S. W. Connally, Jr.
Chairman, President, and Chief Executive Officer
Age 47
Served as Director since 2012
Julian B. MacQueen (2)
Age 66
Served as Director since 2013
Allan G. Bense (2)
Age 65
Served as Director since 2010
J. Mort O'Sullivan, III(2)
Age 65
Served as Director since 2010
Deborah H. Calder (2)
Age 56
Served as Director since 2010
Michael T. Rehwinkel (2)
Age 60
Served as Director since 2013
William C. Cramer, Jr. (2)
Age 64
Served as Director since 2002
Winston E. Scott(2)
Age 66
Served as Director since 2003
(1)Ages listed are as of December 31, 2016.
(2)No position other than director.
Each of the above is currently a director of Gulf Power, serving a term running from the last annual meeting of Gulf Power's shareholders (June 28, 2016) for one year until the next annual meeting or until a successor is elected and qualified.
There are no arrangements or understandings between any of the individuals listed above and any other person pursuant to which he or she was or is to be selected as a director, other than any arrangements or understandings with directors or officers of Gulf Power acting solely in their capacities as such.

Identification of executive officers of Gulf Power (1)
S. W. Connally, Jr.
Chairman, President, and Chief Executive Officer
Age 47
Served as Executive Officer since 2012
Michael L. Burroughs
Vice President — Senior Production Officer
Age 56
Served as Executive Officer since 2010
Jim R. Fletcher
Vice President — External Affairs and Corporate Services
Age 50
Served as Executive Officer since 2014
Wendell E. Smith
Vice President — Power Delivery
Age 51
Served as Executive Officer since 2014
Xia Liu
Vice President and Chief Financial Officer
Age 46
Served as Executive Officer since 2015
Bentina C. Terry
Vice President — Customer Service and Sales
Age 46
Served as Executive Officer since 2007
(1)Ages listed are as of December 31, 2016.
Each of the above is currently an executive officer of Gulf Power, serving a term until the next annual organizational meeting of the Board of Directors or until a successor is elected and qualified.
There are no arrangements or understandings between any of the individuals listed above and any other person pursuant to which he or she was or is to be selected as an officer, other than any arrangements or understandings with directors or officers of Gulf Power acting solely in their capacities as such.
Identification of certain significant employees.None.
Family relationships.None.
Business experience.Unless noted otherwise, each director has served in his or her present position for at least the past five years.
DIRECTORS
Gulf Power's Board of Directors possesses collective knowledge and experience in accounting, finance, leadership, business operations, risk management, corporate governance, and Gulf Power's industry.
S. W. Connally, Jr. - Mr. Connally has served as President, Chief Executive Officer, and Director of Gulf Power since July 2012. He has served as Chairman of Gulf Power's Board of Directors since July 2012 and was first elected to that position in July 2015. Mr. Connally previously served as Senior Vice President and Chief Production Officer of Georgia Power from August 2010 through June 2012. He has been a member of the board of directors of Capital City Bank Group, Inc. since January 2017.
Allan G. Bense - Panama City businessman and former Speaker of the Florida House of Representatives. Mr. Bense is a partner in several companies involved in road building, mechanical contracting, insurance, general contracting, golf courses, and farming. He has more than 43 years of business and leadership experience. Mr. Bense also has been a member of the board of directors of Capital City Bank Group, Inc. since 2013.
Deborah H. Calder - Executive Vice President for Navy Federal Credit Union since 2014. From 2008 to 2014, she served as Senior Vice President. Ms. Calder directs the day-to-day operations of more than 5,000 employees and the ongoing construction of Navy Federal Credit Union's campus in the Pensacola area. Ms. Calder has been with Navy Federal Credit Union for over 25 years, serving in previous positions as Vice President of Consumer and Credit Card Lending, Vice President of Collections, Vice President of Call Center Operations, and Assistant Vice President of Credit Cards.
William C. Cramer, Jr. - President and Owner of automobile dealerships in Florida and Alabama. Mr. Cramer has been an authorized Chevrolet dealer for over 27 years. In 2009, Mr. Cramer became an authorized dealer of Cadillac, Buick, and GMC vehicles.
Julian B. MacQueen - Founder and Chief Executive Officer of Innisfree Hotels, Inc. for over 30 years. He is currently a member of the American Hotel & Lodging Association and a director of the Beach Community Bank.
J. Mort O'Sullivan, III - Managing Member of the Gulf Coast region of Warren Averett, LLC, a CPA and Advisory firm. Mr. O'Sullivan currently focuses on consulting and management advisory services to clients, while continuing to offer his expertise in litigation support, business valuations, and mergers and acquisitions. He is a registered investment advisor. Mr. O'Sullivan has over 35 years of leadership experience in public accounting.
Michael T. Rehwinkel - Mr. Rehwinkel previously served as Executive Chairman of EVRAZ North America, a steel manufacturer, from July 2013 to December 2015 and as Chief Executive Officer and President from February 2010 to July

2013. Mr. Rehwinkel also served as Chairman of the American Iron and Steel Institute in 2012 and 2013. Mr. Rehwinkel has more than 35 years of industrial business and leadership experience.
Winston E. Scott - Senior Advisor to the President, Florida Institute of Technology since January 2017. Mr. Scott previously served as Senior Vice President for External Relations and Economic Development, Florida Institute of Technology from March 2012 to January 2017 and Dean, College of Aeronautics, Florida Institute of Technology from August 2008 through March 2012. Mr. Scott is also a member of the board of directors of Environmental Tectonics Corporation.
EXECUTIVE OFFICERS
Michael L. Burroughs - Vice President and Senior Production Officer since August 2010.
Jim R. Fletcher - Vice President of External Affairs and Corporate Services since March 2014. He previously served as Vice President of Governmental and Regulatory Affairs for Georgia Power from January 2011 to February 2014.
Xia Liu - Vice President and Chief Financial Officer since June 2015. She previously served as Treasurer of Southern Company and Senior Vice President of Finance and Treasurer of SCS from March 2014 to June 2015 and Assistant Treasurer of Southern Company and Vice President of Finance and Assistant Treasurer of SCS from July 2010 to March 2014.
Wendell E. Smith - Vice President of Power Delivery since March 2014. He previously served as the General Manager of Distribution Engineering, Construction and Maintenance and Distribution Operations Systems for Georgia Power from January 2012 to February 2014.
Bentina C. Terry - Vice President of Customer Service and Sales since March 2014. She previously served as Vice President of External Affairs and Corporate Services from March 2007 to March 2014.
Involvement in certain legal proceedings. None.
Promoters and Control Persons. None.
Section 16(a) Beneficial Ownership Reporting Compliance. No late filings to report.
Code of Ethics
The registrantsRegistrants collectively have adopted a code of business conduct and ethics (Code of Ethics) that applies to each director, officer, and employee of the registrantsRegistrants and their subsidiaries. The Code of Ethics can be found on Southern Company's website located at www.southerncompany.com. The Code of Ethics is also available free of charge in print to any shareholder by requesting a copy from Myra C. Bierria, Corporate Secretary, Southern Company, 30 Ivan Allen Jr. Boulevard NW, Atlanta, Georgia 30308. Any amendment to or waiver from the Code of Ethics that applies to executive officers and directors will be posted on the website.
Corporate Governance
Southern Company has adopted corporate governance guidelines and committee charters. The corporate governance guidelines and the charters of Southern Company's Audit Committee, Compensation and Management Succession Committee, Finance Committee, Governance Committee, and Nuclear/Operations Committee can be found on Southern Company's website located at www.southerncompany.com. The corporate governance guidelines and charters are also available free of charge in print to any shareholder by requesting a copy from Myra C. Bierria, Corporate Secretary, Southern Company, 30 Ivan Allen Jr. Boulevard NW, Atlanta, Georgia 30308.
Southern Company owns all of Gulf Power's outstanding common stock. Under the rules of the SEC, Gulf Power is exempt from the audit committee requirements of Section 301 of the Sarbanes-Oxley Act of 2002 and, therefore, is not required to have an audit committee or an audit committee report on whether it has an audit committee financial expert.




Item 11.EXECUTIVE COMPENSATION

GULF POWER

COMPENSATION DISCUSSION AND ANALYSIS (CD&A)
In this CD&A and this Form 10-K, references to the "Compensation Committee" are to the Compensation and Management Succession Committee of the Board of Directors of Southern Company.
This section describes the compensation program for Gulf Power's Chief Executive Officer and Chief Financial Officer in 2016, as well as each of its other three most highly compensated executive officers serving at the end of the year. Collectively, these officers are referred to as the named executive officers.
S. W. Connally, Jr.Chairman, President, and Chief Executive Officer
Xia LiuVice President and Chief Financial Officer
Jim R. FletcherVice President
Wendell E. SmithVice President
Bentina C. TerryVice President


EXECUTIVE SUMMARY

Pay for Performance

Performance-based pay represents a substantial portion of the total direct compensation paid or granted to the named executive officers for 2016.

 


Salary ($)(1)

% of Total
Annual Cash Incentive Award ($)(2)

% of Total
Long-term Equity Incentive Award ($)(3)

% of Total
S. W. Connally, Jr.453,52126%510,62429%805,35545%
X. Liu281,30942%220,46133%169,90425%
J. R. Fletcher252,46142%202,46433%148,59625%
W. E. Smith218,70748%158,44734%84,71918%
B. C. Terry284,49842%219,62032%173,19126%

(1) Salary is the actual amount paid in 2016.
(2) Annual Cash Incentive Award is the actual amount earned in 2016 under the Performance Pay Program based on achievement of annual performance goals.
(3) Long-Term Equity Incentive Award reflects the target value of the performance shares granted in 2016 under the Performance Share Program.

The executive compensation program places significant focus on rewarding performance. The program is performance-based in several respects:

Business unit financial and operational performance and Southern Company earnings per share (EPS), based on actual results as adjusted by the Compensation Committee, compared to target performance levels established early in the year, determine the actual payouts under the annual cash incentive award program (Performance Pay Program).

Southern Company's total shareholder return (TSR) compared to those of industry peers, cumulative EPS, and equity-weighted return on equity (ROE) over a three-year period lead to higher or lower payouts under the long-term equity incentive award program (Performance Share Program).

In support of this performance-based pay philosophy, Gulf Power has no general employment contracts with the named executive officers.


The pay-for-performance principles apply not only to the named executive officers but to hundreds of Gulf Power's employees. The Performance Pay Program covers almost all of the approximately 1,400 employees of Gulf Power. Performance shares were granted to 133 employees of Gulf Power in 2016. These programs engage employees and encourage alignment of their interests with Gulf Power's customers and Southern Company's stockholders.

Gulf Power's financial and operational goal results and Southern Company's EPS goal results for 2016, as adjusted and further described in this CD&A, are shown below:
Financial: 187% of TargetOperational: 161% of TargetEPS: 171% of Target

Southern Company's annualized TSR has been:
1-Year: 9.9%3-Year: 11.2%5-year: 5.9%

These levels of achievement, as adjusted, resulted in payouts that were aligned with Gulf Power's and Southern Company's performance.

Compensation Philosophy

Gulf Power's compensation program is based on the following beliefs:
Employees' commitment and performance have a significant impact on achieving business results;
Compensation and benefits offered must attract, retain, and engage employees and must be financially sustainable;
Compensation should be consistent with performance: higher pay for higher performance and lower pay for lower performance; and
Both business drivers and culture should influence the compensation and benefit program.

Based on these beliefs, the Compensation Committee believes that Gulf Power's executive compensation program should:

Be competitive with Gulf Power's industry peers;
Reward achievement of Gulf Power's goals;
Be aligned with the interests of Southern Company's stockholders and Gulf Power's customers; and
Not encourage excessive risk-taking.

Executive compensation is targeted at the market median of industry peers, but actual compensation is primarily determined by achievement of Gulf Power's and Southern Company's business goals. Gulf Power believes that focusing on the customer drives achievement of financial objectives and delivery of a premium, risk-adjusted TSR for Southern Company's stockholders. Therefore, short-term performance pay is based on achievement of Gulf Power's operational and financial performance goals and Southern Company's EPS goal. Long-term performance pay is tied to Southern Company's TSR performance, cumulative EPS, and equity-weighted ROE.

Key Compensation Practices

•    Annual pay risk assessment required by the Compensation Committee charter.
Retention by the Compensation Committee of an independent compensation consultant, Pay Governance LLC (Pay Governance), that provides no other services to Gulf Power or Southern Company.
Inclusion of a claw-back provision that permits the Compensation Committee to recoup performance pay from any employee if determined to have been based on erroneous results, and requires recoupment from an executive officer in the event of a material financial restatement due to fraud or misconduct of the executive officer.
•    No excise tax gross-up on change-in-control severance arrangements.
Provision of limited perquisites with no income tax gross-ups for the Chairman, President, and Chief Executive Officer, except on certain relocation-related benefits.
•    "No-hedging" provision in Gulf Power's insider trading policy that is applicable to all employees.
•    Policy against pledging of Southern Company stock applicable to all executive officers and directors of Southern Company,
including Gulf Power's Chief Executive Officer.
•    Strong stock ownership requirements that are being met by all named executive officers.


Establishing Executive Compensation

The Compensation Committee establishes the Southern Company system executive compensation program. In doing so, the Compensation Committee relies on input from its independent compensation consultant, Pay Governance. The Compensation Committee also relies on input from the Southern Company Human Resources staff and, for individual executive officer performance, from Southern Company's and Gulf Power's respective Chief Executive Officers. The role and information provided by each of these sources is described throughout this CD&A.

Consideration of Southern Company Stockholder Advisory Vote on Executive Compensation

The Compensation Committee considered the stockholder vote on Southern Company's executive compensation at the Southern Company 2016 annual meeting of stockholders. In light of the significant support of Southern Company's stockholders (93% of votes cast voting in favor of the proposal) and the actual payout levels of the performance-based compensation program, the Compensation Committee continues to believe that the executive compensation program is competitive, aligned with Gulf Power's and Southern Company's financial and operational performance, and in the best interests of Gulf Power's customers and Southern Company's stockholders.

ESTABLISHING MARKET-BASED COMPENSATION LEVELS

Pay Governance develops and presents to the Compensation Committee a competitive market-based compensation level for Gulf Power's Chief Executive Officer, while the Southern Company Human Resources staff develops competitive market-based compensation levels for the other Gulf Power named executive officers. The market-based compensation levels for Gulf Power's Chief Executive Officer are developed from the Willis Towers Watson Energy Services Survey focusing on regulated utilities with revenues above $6 billion, listed below. The market-based compensation levels for the other Gulf Power named executive officers are developed from a size-appropriate energy services executive compensation survey database comprised of several general industry and utility national surveys. For 2016, these levels were market tested using the Willis Towers Watson 2016 CDB Energy Services Executive Compensation Survey Report. The survey participants, listed below, are utilities with revenues of $1 billion or more.

Market data for Gulf Power's Chief Executive Officer position and other positions in terms of scope of responsibilities that most closely resemble the positions held by the named executive officers is reviewed. When appropriate, the market data is size-adjusted, up or down, to accurately reflect comparable scopes of responsibilities. Based on that data, a total target compensation opportunity is established for each named executive officer. Total target compensation opportunity is the sum of base salary, the annual cash incentive award at target performance level, and the long-term equity incentive award at target performance level. Actual compensation paid may be more or less than the total target compensation opportunity based on actual performance above or below target performance levels. As a result, the compensation program is designed to result in payouts that are market-appropriate given Gulf Power's and Southern Company's performance for the year or period.

A specified weight was not targeted for base salary, the annual cash incentive award, or the long-term equity incentive award as a percentage of total target compensation opportunities, nor did amounts realized or realizable from prior compensation serve to increase or decrease 2016 compensation amounts.

Total target compensation opportunities for senior management as a group, including the named executive officers, are managed to be at the median of the market for companies of similar size in the electric utility industry. Therefore, some executives may be paid above and others below market. This practice allows for differentiation based on time in the position, scope of responsibilities, and individual performance. The differences in the total pay opportunities for each named executive officer are based almost exclusively on the differences indicated by the market data for persons holding similar positions. Because of the use of market data from a large number of industry peer companies for positions that are not identical in terms of scope of responsibility from company to company, differences are not considered to be material and the compensation program is believed to be market-appropriate, as long as senior management as a group is within an appropriate range. Generally, compensation is considered to be within an appropriate range if it is not more or less than 15% of the applicable market data.








Gulf Power Chief Executive Officer Compensation Peer Group
American Electric Power Company, Inc.Duke Energy CorporationNRG Energy, Inc.
Ameren CorporationEdison InternationalPG&E Corporation
Berkshire Hathaway Energy CompanyEnergy Transfer Partners, L.P.PPL Corporation
Calpine CorporationEntergy CorporationPublic Service Enterprise Group, Inc.
CenterPoint Energy, Inc.Exelon CorporationSempra Energy
CMS Energy CorporationFirstEnergy Corp.Tennessee Valley Authority
Consolidated Edison, Inc.Kinder Morgan, Inc.The AES Corporation
Direct EnergyMonroe Energy LLCThe Williams Companies
Dominion Resources, Inc.NextEra Energy, Inc.UGI Corporation
DTE Energy CompanyNiSource Inc.Xcel Energy

Gulf Power Named Executive Officer Peer Group (non-Chief Executive Officer)
AGL Resources Inc.Exelon CorporationPNM Resources Inc.
Allete, Inc.FirstEnergy Corp.Portland General Electric Company
Alliant Energy CorporationFirst Solar Inc.PPL Corporation
Ameren CorporationGE EnergyPublic Service Enterprise Group Inc.
American Electric Power Company, Inc.GE Oil & GasPuget Sound Energy, Inc.
American Water Works Company, Inc.Genesis EnergyQuestar Corporation
Areva Inc.Idaho Power CompanySacramento Municipal Utility District
Atmos Energy CorporationITC HoldingsSalt River Project
Avista CorporationJEASCANA Corporation
Black Hills CorporationKinder Morgan Energy Partners, L.P.ShawCor Ltd.
Boardwalk Pipeline Partners, L.P.LG&E and KU Energy LLCSempra Energy
Bonneville Power AdministrationLower Colorado River AuthoritySouthwest Gas Corporation
Calpine CorporationMDU Resources Group, Inc.Spectra Energy Corp.
CenterPoint Energy, Inc.Monroe EnergyTalen Energy
Cleco CorporationNational Grid USATECO Energy, Inc.
CMS Energy CorporationNew York Power AuthorityTennessee Valley Authority
Covanta CorporationNextEra Energy, Inc.The AES Corporation
CPS EnergyNorthWestern CorporationThe Williams Companies, Inc.
Direct EnergyNOVA Chemicals CorporationTransCanada Corporation
Dominion Resources, Inc.NRG Energy, Inc.Tri-State Generation & Transmission Association, Inc.
DTE Energy CompanyOGE Energy Corp.
Duke Energy CorporationOglethorpe Power CorporationUGI Corporation
Edison InternationalOld Dominion ElectricUIL Holdings
Enable Midstream PartnersOmaha Public Power DistrictUNS Energy Corporation
Energy Future Holdings Corp.Oncor Electric Delivery Company LLCVectren Corporation
Energy Transfer Partners, L.P.ONE Gas, Inc.Westar Energy, Inc.
EnLink MidstreamONEOK, Inc.WEC Energy Group, Inc.
Entergy CorporationPacific Gas & Electric CompanyXcel Energy Inc.
EQT CorporationPinnacle West Capital Corporation




EXECUTIVE COMPENSATION PROGRAM

The primary components of the 2016 executive compensation program include:
Short-term compensation
Base salary
Performance Pay Program
Long-term compensation
Performance Share Program
Benefits

The performance-based compensation components are linked to Gulf Power's financial and operational performance as well as Southern Company's financial and stock price performance, including TSR, EPS, and ROE. The executive compensation program is approved by the Compensation Committee, which consists entirely of independent directors of Southern Company. The Compensation Committee believes that the executive compensation program is a balanced program that provides market-based compensation and rewards performance.

2016 Base Salary

Most employees, including all of the named executive officers, received base salary increases in 2016.

With the exception of Southern Company executive officers, including Mr. Connally, base salaries for all Southern Company system officers are within a position level with a base salary range that is established by Southern Company Human Resources staff using the market data described above. Each officer is within one of these established position levels based on the scope of responsibilities that most closely resemble the positions included in the market data described above. The base salary level for individual officers is set within the applicable pre-established range. Factors that influence the specific base salary level within the range include the need to retain an experienced team, internal equity, time in position, and individual performance. Individual performance includes the degree of competence and initiative exhibited and the individual's relative contribution to the achievement of financial and operational goals in prior years.

Base salaries are reviewed annually in February, and changes are made effective March 1. The 2016 base salary levels for the named executive officers, other than for the Chief Executive Officer, were set within the applicable position level salary range and approved by Gulf Power's Chief Executive Officer. Mr. Connally's base salary was recommended by the Chief Executive Officer of Southern Company and approved by the Compensation Committee.


March 1, 2015
Base Salary
($)
March 1, 2016
Base Salary
($)
S. W. Connally, Jr.426,119460,208
X. Liu258,124283,188
J. R. Fletcher240,470247,684
W. E. Smith204,555211,715
B. C. Terry280,264288,672

In 2016, Mr. Fletcher and Mr. Smith received mid-year salary increases. Mr. Fletcher's salary was adjusted to $260,068, and Mr. Smith's salary was adjusted to $228,970. Mr. Fletcher's salary was adjusted to better align his compensation with that of his peers. Mr. Smith's salary was also adjusted to better align with that of his peers as well as to reflect his additional duties at Southern Company subsidiary PowerSecure. Ms. Terry's 2016 salary was adjusted after the March 1 increase to $282,108 pursuant to the Southern Company Club Dues Guidelines (Guidelines). The Guidelines detail the Southern Company system's treatment of expenses and dues related to business dining clubs and country clubs.

2016 Performance-Based Compensation

This section describes short-term and long-term performance-based compensation for 2016.

Achieving Operational and Financial Performance Goals - The Guiding Principle for Performance-Based Compensation

The Southern Company system's number one priority is to provide customers outstanding reliability and superior service at reasonable prices while achieving a level of financial performance that benefits Southern Company's stockholders in the short and

long term. Operational excellence and business unit and Southern Company financial performance are integral to the achievement of business results that benefit customers and stockholders.

Therefore, in 2016, Gulf Power strove for and rewarded:

Continuing industry-leading reliability and customer satisfaction, while maintaining reasonable retail prices;
•    Meeting energy demand with the best economic and environmental choices;
•    Long-term, risk-adjusted Southern Company relative TSR performance against a group of peer companies;
•    Achieving net income goals to support the Southern Company financial plan and dividend growth; and
•    Financial integrity - an attractive risk-adjusted return and sound financial policy.

The performance-based compensation program is designed to encourage achievement of these goals.

2016 Annual Performance-Based Pay Program

Annual Performance Pay Program Highlights

Rewards achievement of annual performance goals; performance results can range from 0 to 200% of target, based on actual level of goal achievement
EPS: earned at 171% of target
Net Income: earned at 187% of target
Operations: earned at 161% of target
2016 Payout: Exceeded target performance
Chief Executive Officer payout at 171% of target
Other named executive officers' payouts at 173% of target

Overview of Program Design

Almost all employees of Gulf Power, including the named executive officers, are participants.

The performance goals are set at the beginning of each year by the Compensation Committee and include financial and operational goals for all employees. In setting goals, the Compensation Committee relies on information on financial and operational goals from the Finance Committee and the Nuclear/Operations Committee of the Southern Company Board of Directors, respectively.

Business Unit Financial Goal: Net Income
For Southern Company's traditional electric operating companies, including Gulf Power, the business unit financial performance goal is net income.

Business Unit Operational Goals: Varies by business unit
For Southern Company's traditional electric operating companies, including Gulf Power, operational goals are customer satisfaction, safety, culture, transmission and distribution system reliability, plant availability, and major projects (if applicable to the specific traditional electric operating company). Each of these operational goals is explained in more detail under Goal Details below. The level of achievement for each operational goal is determined according to the respective performance schedule, and the total operational goal performance is determined by the weighted average result. Each business unit has its own operational goals.

Southern Company Financial Goal: EPS
EPS is defined as Southern Company's net income from ongoing business activities divided by average shares outstanding during the year, as adjusted and approved by the Compensation Committee. The EPS performance measure is applicable to all participants in the Performance Pay Program.

Individual Performance Goals for the Chief Executive Officer
The Performance Pay Program incorporates individual goals for all executive officers of Southern Company, including Mr. Connally. The Chief Executive Officer of Southern Company reviews the individual performance of Mr. Connally and recommends the payout level for approval by the Compensation Committee. The individual goals account for 10% of Mr. Connally's Performance Pay Program goals.


Under the terms of the program, no payout can be made if events occur that impact Southern Company's financial ability to fund the Southern Company common stock (Common Stock) dividend.

Goal Details
Operational GoalsDescriptionWhy It Is Important
Customer SatisfactionCustomer satisfaction surveys evaluate performance. The survey results provide an overall ranking for each traditional electric operating company, including Gulf Power, as well as a ranking for each customer segment: residential, commercial, and industrial.Customer satisfaction is key to operations. Performance of all operational goals affects customer satisfaction.
SafetySouthern Company's Target Zero program is focused on continuous improvement in striving for a safe work environment. The performance is measured by the applicable company's ranking, as compared to peer utilities in the Southeastern Electric Exchange.Essential for the protection of employees, customers, and communities.
CultureThe culture goal seeks to improve Gulf Power's inclusive workplace. This goal includes measures for work environment (employee satisfaction survey), representation of minorities and females in leadership roles (subjectively assessed), and supplier diversity.Supports workforce development efforts and helps to assure diversity of suppliers.
ReliabilityTransmission and distribution system reliability performance is measured by the frequency and duration of outages. Performance targets for reliability are set internally based on recent historical performance.Reliably delivering power to customers is essential to Gulf Power's operations.
AvailabilityPeak season equivalent forced outage rate is an indicator of availability and efficient generation fleet operations during the months when generation needs are greatest. Availability is measured as a percentage of the hours of forced outages out of the total generation hours.Availability of sufficient power during peak season fulfills the obligation to serve and provide customers with the least cost generating resources.
Financial Performance GoalsDescriptionWhy It Is Important
EPSSouthern Company's net income from ongoing business activities divided by average shares outstanding during the year.Supports commitment to provide Southern Company's stockholders solid, risk-adjusted returns and to support and grow the dividend.
Net Income
For the traditional electric operating companies, including Gulf Power, the business unit financial performance goal is net income after dividends on preferred and preference stock.

Overall corporate performance is determined by the equity-weighted average of the business unit net income goal payouts.
Supports delivery of Southern Company stockholder value and contributes to Gulf Power's and Southern Company's sound financial policies and stable credit ratings.
Individual Performance Goals (Mr. Connally only)DescriptionWhy It Is Important
Individual FactorsFocus on overall business performance as well as factors including leadership development, succession planning, and fostering the culture and diversity of the organization.Individual goals provide the Compensation Committee the ability to balance quantitative results with qualitative inputs by focusing on both business performance and behavioral aspects of leadership that lead to sustainable long-term growth.


The Compensation Committee approves threshold, target, and maximum performance levels for each of the operational goals. The ranges for the net income goal for Gulf Power and the Southern Company EPS goal for 2016 are shown below. If goal achievement is below threshold, there is no payout associated with the applicable goal.
Level of Performance
Gulf Power
Net Income
($, in millions)
Southern Company
EPS ($)
Maximum132.42.96
Target118.82.82
Threshold105.12.68

Calculating Payouts

All of the named executive officers are paid based on Southern Company EPS performance as well as Gulf Power's net income and operational performance.

2016 goal achievement is shown in the following tables.

Gulf Power Operational Goal Results
GoalAchievement
Customer SatisfactionMaximum
SafetyBelow target
CultureAbove target
ReliabilitySignificantly above target
AvailabilityMaximum
Total Gulf Power Operational Goal Performance Factor161%

Financial Performance Goal Results
GoalResultAchievement Percentage (%)
Gulf Power Net Income (in millions)*$130.7187
Southern Company EPS (from ongoing business activities)*$2.89171

*The Compensation Committee may make adjustments, both positive and negative, to goal achievement for purposes of determining payouts.
EPS: Southern Company's adjusted EPS result was $2.89, exceeding the $2.82 target. The adjusted EPS result excludes the impact of charges related to the Kemper IGCC, equity return related to the Kemper IGCC schedule extension, and earnings, acquisition costs, integration costs, and financing costs related to Southern Company Gas, PowerSecure, and Southern Natural Gas. This is consistent with the earnings results publicly communicated to investors.
Net Income: Gulf Power's adjusted net income result was $130.7 million, exceeding the $118.8 million target. The adjusted result excludes the impact of integration costs.

A total performance factor for the named executive officers is determined by adding the applicable business unit financial and operational goal performance results and the EPS result and dividing by three, except for Mr. Connally. For Mr. Connally, the business unit financial and operational goal performance results and the EPS result are worth 30% each of the total performance factor, while his individual performance goal result is worth the remaining 10%. The total performance factor is multiplied by the target Performance Pay Program opportunity to determine the payout for each named executive officer.
 
Southern Company EPS Result
(%)
Business Unit Financial Goal Result
(%)
Business Unit Operational Goal Result (%)Individual Goal Result (%)
Total Performance Factor
(%)
S. W. Connally, Jr.171187161150171
X. Liu171187161N/A173
J. R. Fletcher171187161N/A173
W. E. Smith171187161N/A173
B. C. Terry171187161N/A173






Target Annual Performance Pay Program Opportunity
(% of base salary)
Target Annual
Performance
Pay Program
Opportunity ($)
Total
Performance
Factor
(% of target)
Actual Annual
Performance
Pay Program
Payout ($)
S. W. Connally, Jr.65299,135171510,624
X. Liu45127,434173220,461
J. R. Fletcher45117,031173202,464
W. E. Smith4091,588173158,447
B. C. Terry45126,948173219,620

Long-Term Performance-Based Compensation

2016 Long-Term Pay Program Highlights

Long-term performance-based awards are intended to promote long-term success and increase stockholder value by directly tying a substantial portion of the named executive officers' total compensation to the interests of Southern Company stockholders.
Performance shares represent 100% of long-term target value
TSR relative to industry peers (50%)
Cumulative three-year EPS (25%)
Equity-weighted ROE (25%)
Three-year performance period from 2016 through 2018
Performance results can range from 0 to 200% of target
Paid in Common Stock at the end of the performance period; accrued dividends only received if and when award is earned

2016-2018 Performance Share Program Grant

Performance shares are denominated in units, meaning no actual shares are issued on the grant date. A grant date fair value per unit was determined. For the portion of the grant attributable to the relative TSR goal, the value per unit was $45.19. For the portion of the grant attributable to the cumulative three-year EPS and equity-weighted ROE goals, the value per unit was $48.82. A target number of performance shares are granted to a participant, based on the total target value as determined as a percentage of a participant's base salary, which varies by grade level. The total target value for performance share units is divided by the value per unit to determine the number of performance share units granted to each participant, including the named executive officers. Each performance share unit represents one share of Common Stock.

The award includes three performance measures for the 2016 - 2018 performance period, as well as a credit quality threshold requirement.
GoalWhat it MeasuresWhy it's Important
Relative TSR
(50% weighting)
Total shareholder return relative to peer companiesAligns employee pay with investor returns relative to peers
Cumulative EPS
(25% weighting)
Cumulative EPS over the three-year performance periodAligns employee pay with Southern Company's earnings growth
Equity-Weighted ROE
(25% weighting)
Equity-weighted ROE of the traditional electric operating companiesAligns employee pay with Southern Company's ability to maximize return on capital invested

The EPS and ROE goals are also both subject to a credit quality threshold requirement that encourages the maintenance of adequate credit ratings to provide an attractive return to investors. If the primary credit rating of Southern Company, Alabama Power, or Georgia Power falls below investment grade at the end of the three-year performance period, the payout for the EPS and ROE goals will be reduced to zero.

For each of the performance measures, a threshold, target, and maximum goal was set at the beginning of the performance period.

 
Relative TSR Performance
(50% weighting)
Cumulative EPS Performance
(25% weighting)
Equity-Weighted ROE Performance
(25% weighting)
Payout
(% of Performance Share Units Paid)
Maximum90th percentile or higher$9.376.1%200%
Target50th percentile$8.854.9%100%
Threshold10th percentile$8.344.5%0%

TSR is measured relative to a peer group of companies that are believed to be most similar to Southern Company in both business model and investors. The peer group is subject to change based on merger and acquisition activity.
TSR Performance Share Peer Group for 2016 - 2018 Performance Period
Alliant Energy CorporationEversource Energy
Ameren CorporationOGE Energy Corporation
American Electric Power Company, Inc.PG&E Corporation
CMS Energy CorporationPinnacle West Capital Corporation
Consolidated Edison, Inc.PPL Corporation
DTE Energy CompanySCANA Corporation
Duke Energy CorporationWestar Energy Inc.
Edison InternationalWEC Energy Group, Inc.
Entergy CorporationXcel Energy Inc.

The following table shows the grant date fair value and target number of the long-term equity incentive awards granted in 2016.
 Target Value (% of base salary)
Relative TSR
(50%)
Cumulative EPS
(25%)
Equity-Weighted ROE (25%)Total Long-Term Grant
 Grant Date Fair Value ($)Target Number of Shares (#)Grant Date Fair Value ($)Target Number of Shares (#)Grant Date Fair Value ($)Target Number of Shares (#)Grant Date Fair Value ($)Target Number of Shares (#)
S. W. Connally, Jr.175402,6888,911201,3344,124201,3344,124805,35517,159
X. Liu6084,9571,88042,47387042,473870169,9043,620
J. R. Fletcher6074,2921,64437,15276137,152761148,5963,166
W. E. Smith4042,34393721,18843421,18843484,7191,805
B. C. Terry6086,5841,91643,30388743,303887173,1913,690

Other Details about the Program
Performance shares are not earned until the end of the three-year performance period and after certification of the results by the Compensation Committee. A participant can earn from 0 to 200% of the target number of performance shares granted at the beginning of the performance period based solely on achievement of the performance goals over the three-year performance period. Dividend equivalents are credited during the three-year performance period but are only paid out if and when the award is earned. If no performance shares are earned, then no dividends are paid out. Payout for performance between points will be interpolated on a straight-line basis.

Participants who retire during the performance period will receive the full amount of performance shares actually earned at the end of the three-year period. Participants who become disabled or die during the performance period will receive a prorated number of performance shares based on the performance shares actually earned at the end of the three-year period. A participant who terminates employment, other than due to retirement, death, or disability, forfeits all unearned performance shares.

The Compensation Committee retains the discretion to approve adjustments in determining actual performance goal achievement.




2014 Long-Term Incentive Compensation Grants

In 2014, 60% of the target value of the long-term incentive program was granted in the form of performance shares under the Performance Share Program. For the three-year performance period of 2014 - 2016, performance shares could be earned based on a relative TSR performance goal. The Southern Company three-year TSR performance relative to the custom peer group selected by the Compensation Committee was below the threshold performance level. As a result, no participants in the program, including the named executive officers, earned performance share awards for the 2014 - 2016 performance period.

TSR Performance Share Peer Group for 2014 - 2016 Performance Period
Alliant Energy CorporationEversource Energy
Ameren CorporationPG&E Corporation
American Electric Power Company, Inc.Pinnacle West Capital Corporation
CMS Energy CorporationPPL Corporation
Consolidated Edison, Inc.SCANA Corporation
DTE Energy CompanyWEC Energy Group, Inc.
Duke Energy CorporationXcel Energy Inc.
Edison International


Target Performance Shares Granted (#)Grant Date Target Value of Performance Shares ($)Performance Shares Earned (#)Value of Performance Shares Earned ($)
S. W. Connally, Jr.8,274310,60600
X. Liu2,32087,09300
J. R. Fletcher1,35050,67900
W. E. Smith74828,08000
B. C. Terry2,60897,90400

In 2014, the remaining 40% of the target value of the long-term incentive program was granted in the form of stock options which vested one-third each year on the anniversary of the grant date. The 2014 stock option grants had an exercise price of $41.28 per share. The Common Stock closing stock price on December 30, 2016 was $49.19.
Timing of Performance-Based Compensation

The establishment of performance-based compensation goals and the granting of equity awards are not timed to coincide with the release of material, non-public information.

Southern Excellence Awards

Mr. Smith received a Southern Excellence Award in 2016 in the amount of $5,000 for the significant contributions and leadership he provided to Southern Company subsidiary PowerSecure during Hurricane Matthew restoration efforts.

Retirement and Severance Benefits

Certain post-employment compensation is provided to employees, including the named executive officers, consistent with Gulf Power's goal of providing market-based compensation and benefits.

Retirement Benefits

Substantially all employees of Gulf Power participate in the funded Pension Plan. Normal retirement benefits become payable when participants attain age 65. Employees are vested after completing five years of vesting service. One year of vesting service is equivalent to working at least 1,000 hours in a one-year period. Gulf Power also provides unfunded benefits to certain employees, including the named executive officers, under two nonqualified plans: the Supplemental Benefit Plan (Pension-Related) (SBP-P) and the Supplemental Executive Retirement Plan (SERP). The SBP-P and the SERP provide additional benefits the Pension Plan cannot pay due to limits prescribed for the Pension Plan under the Internal Revenue Code. See the Pension Benefits table and accompanying information for more pension-related benefits information.


Substantially all employees are eligible to participate in the Employee Savings Plan (ESP), Southern Company's 401(k) plan. The named executive officers are also eligible to participate in the Supplemental Benefit Plan (SBP), which is a nonqualified deferred compensation plan where employer contributions are made that are prohibited under the ESP due to limits prescribed for 401(k) plans under the Internal Revenue Code.

Gulf Power and its affiliates also provide supplemental retirement benefits to certain employees that were first employed by Gulf Power, or an affiliate of Gulf Power, in the middle of their careers. Gulf Power has had a supplemental retirement agreement (SRA) with Ms. Terry since 2010. Prior to her employment with the Southern Company system, Ms. Terry provided legal services to Southern Company's subsidiaries. Ms. Terry's agreement provides retirement benefits as if she was employed an additional 10 years. Ms. Terry must remain employed at Gulf Power or an affiliate of Gulf Power for 10 years from the effective date of the SRA before vesting in the benefits. This agreement provides a benefit which recognizes the expertise she brought to Gulf Power and provides a strong retention incentive to remain with Gulf Power, or one of its affiliates, for the vesting period and beyond.

Gulf Power also provides the Deferred Compensation Plan (DCP), which is an unfunded plan that permits participants to defer income as well as certain federal, state, and local taxes until a specified date or their retirement, disability, death, or other separation from service. Up to 50% of base salary and up to 100% of performance-based non-equity compensation may be deferred at the election of eligible employees. All of the named executive officers are eligible to participate in the DCP.

Change-in-Control Protections

Change-in-control protections, including severance pay and, in some situations, vesting or payment of long-term performance-based awards, are provided upon a change in control of Southern Company or Gulf Power coupled with an involuntary termination not for cause or a voluntary termination for "good reason." This means there is a "double trigger" before severance benefits are paid; i.e., there must be both a change in control and a termination of employment. For 2016, severance payment amounts were two times salary plus target Performance Pay Program opportunity for Mr. Connally and one times salary plus Performance Pay Program opportunity for the other named executive officers. No excise tax gross-up would be provided. Change-in-control protections allow executive officers to focus on potential transactions that are in the best interest of shareholders.

Perquisites

Gulf Power provides limited perquisites to its executive officers, including the named executive officers, consistent with Gulf Power's goal of providing market-based compensation and benefits. The perquisites provided in 2016 are described in detail in the information accompanying the Summary Compensation Table. No tax assistance is provided on perquisites for the Chairman, President, and Chief Executive Officer, except on certain relocation-related benefits.


OTHER COMPENSATION POLICIES
Executive Stock Ownership Requirements

Officers of Gulf Power that are in a position of Vice President or above are subject to stock ownership requirements, which align the interests of officers and Southern Company stockholders by promoting a long-term focus and long-term share ownership. The ownership requirement is reduced by one-half at age 60.

The requirements are expressed as a multiple of base salary as shown below.


Multiple of Salary without
Counting Stock Options
Multiple of Salary Counting
Portion of Vested Stock Options
S. W. Connally, Jr.3 Times6 Times
X. Liu2 Times4 Times
J. R. Fletcher2 Times4 Times
W. E. Smith1 Times2 Times
B. C. Terry2 Times4 Times

Ownership arrangements counted toward the requirements include shares owned outright, those held in Southern Company-sponsored plans, and Common Stock accounts in the DCP and the SBP. A portion of vested stock options may be counted, but in that case the ownership requirement is doubled.


Newly-elected and newly-promoted officers have approximately six years from the date of their election or promotion to meet the applicable ownership requirement. Compliance with the applicable ownership requirement is measured as of September 30 each year. All of the named executive officers are meeting their respective ownership requirements.

Clawback of Awards

Southern Company's Omnibus Incentive Compensation Plan provides that, if Southern Company or Gulf Power is required to prepare an accounting restatement due to material noncompliance as a result of misconduct, and if an executive officer of Gulf Power knowingly or grossly negligently engaged in or failed to prevent the misconduct or is subject to automatic forfeiture under the Sarbanes-Oxley Act of 2002, the executive officer must repay the amount of any payment in settlement of awards earned or accrued during the 12-month period following the first public issuance or filing that was restated.

Policy Regarding Hedging and Pledging of Common Stock

Southern Company's insider trading policy provides that employees, officers, and outside directors will not trade Southern Company options on the options market and will not engage in short sales. In early 2016, Southern Company added a "no pledging" provision to the insider trading policy that prohibits pledging of Common Stock for all Southern Company directors and executive officers, including the Gulf Power President and Chief Executive Officer.


COMPENSATION COMMITTEE REPORT

The Compensation Committee met with management to review and discuss the CD&A. Based on such review and discussion, the Compensation Committee recommended to the Southern Company Board of Directors that the CD&A be included in Gulf Power's Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

Members of the Compensation Committee:

Henry A. Clark III, Chair
David J. Grain
Donald M. James
Dale E. Klein
Steven R. Specker



SUMMARY COMPENSATION TABLE
The Summary Compensation Table shows the amount and type of compensation received or earned in 2014, 2015, and 2016 by the named executive officers, except as noted below.






Name and Principal
Position
(a)
 
 
 
 
 
 
 
Year
(b)
 
 
 
 
 
 
Salary
($)
(c)
 
 
 
 
 
 
Bonus
($)
(d)
 
 
 
 
 
Stock
Awards
($)
(e)
 
 
 
 
 
Option
Awards
($)
(f)
 
 
 
Non-Equity
Incentive
Plan
Compensation
($)
(g)
Change in
Pension Value
and
Nonqualified
Deferred
Compensation
Earnings
($)
(h)
 
 
 
 
 
All Other
Compensation
($)
(i)
 
 
 
 
 
 
Total
($)
(j)
          
S. W. Connally, Jr.
President, Chief Executive Officer, and Director
2016453,521

805,355

510,624
536,810
24,523
2,330,833
2015420,758

553,946

391,000
160,338
30,485
1,556,527
2014393,907

310,606
207,086
339,302
496,800
25,948
1,773,649
X. Liu
Vice President and Chief Financial Officer
2016281,309

169,904

220,461
187,312
20,897
879,883
2015265,380

154,865

188,996
59,936
283,417
952,594
         
J. R. Fletcher2016252,461

148,596

202,464
259,385
34,822
897,728
Vice President2015238,711

144,315

169,891
48,436
120,417
721,770
 2014224,547
25,045
50,679
33,801
149,633
273,148
89,971
846,824
W. E. Smith2016218,707
5,000
84,719

158,447
257,056
14,843
738,772
Vice President2015203,401

81,813

128,461
42,181
144,040
599,896
B. C. Terry2016284,498

173,191

219,620
226,913
16,402
920,624
Vice President2015278,682

168,195

198,007
34,345
19,421
698,650
 2014270,543

97,904
65,287
173,833
245,578
17,664
870,809

Column (a)

Ms. Liu and Mr. Smith first became named executive officers in 2015.

Column (d)

The amount shown for 2016 for Mr. Smith represents a Southern Excellence Award as described in the CD&A.

Column (e)

This column does not reflect the value of stock awards that were actually earned or received in 2016. Rather, as required by applicable rules of the SEC, this column reports the aggregate grant date fair value of performance shares granted in 2016. The value reported is based on the probable outcome of the performance conditions as of the grant date, using a Monte Carlo simulation model (50% of grant value) and the closing price of Common Stock on the grant date (50% of grant value). No amounts will be earned until the end of the three-year performance period on December 31, 2018. The value then can be earned based on performance ranging from 0 to 200%, as established by the Compensation Committee.

The aggregate grant date fair value of the performance shares granted in 2016 to the named executive officers, assuming that the highest level of performance is achieved, is as follows: Mr. Connally - $1,610,711; Ms. Liu - $339,808; Mr. Fletcher - $297,193; Mr. Smith - $169,438; Ms. Terry - $346,381 (200% of the amount shown in the table). See Note 8 to the financial statements of Gulf Power in Item 8 herein for a discussion of the assumptions used in calculating these amounts.

Column (f)

The Compensation Committee moved away from granting stock options as part of the long-term incentive program in 2015. No stock options were granted in 2015 or 2016. This column reports the aggregate grant date fair value of stock options granted in 2014.





Column (g)

The amounts in this column reflect actual payouts under the annual Performance Pay Program. The amount reported for 2016 is for the one-year performance period that ended on December 31, 2016. The Performance Pay Program is described in detail in the CD&A.

Column (h)

This column reports the aggregate change in the actuarial present value of each named executive officer's accumulated benefit under the Pension Plan and the supplemental pension plans (collectively, Pension Benefits) as of December 31 of the applicable year. The Pension Benefits as of each measurement date are based on the named executive officer's age, pay, and service accruals and the plan provisions applicable as of the measurement date. The actuarial present values as of each measurement date reflect the assumptions Gulf Power selected for cost purposes as of that measurement date; however, the named executive officers were assumed to remain employed at Gulf Power or another Southern Company subsidiary until their benefits commence at the pension plans' stated normal retirement date, generally age 65. As a result, the amounts in column (h) related to Pension Benefits represent the combined impact of several factors: growth in the named executive officer's Pension Benefits over the measurement year; impact on the total present values of one year shorter discounting period due to the named executive officer being one year closer to normal retirement; impact on the total present values attributable to changes in assumptions from measurement date to measurement date; and impact on the total present values attributable to plan changes between measurement dates.

This column also reports any above-market earnings on deferred compensation under the DCP. However, there were no above-market earnings on deferred compensation in the years reported.

Column (i)

The amounts reported for 2016 are itemized below.


Relocation Benefits
($)
Other Perquisites
($)
Tax
Reimbursements
($)
Company Contributions to ESP
($)
Company Contributions to SBP
($)
Total
($)
S. W. Connally, Jr.1,385
12,407
10,731
24,523
X. Liu500
6,097
42
13,425
832
20,897
J. R. Fletcher12,059
2,754
7,133
12,875
34,822
W. E. Smith2,107
2,038
8,458
2,241
14,843
B. C. Terry1,721
172
13,515
994
16,402

Description of Perquisites

Relocation Benefits. Relocation benefits are provided to cover the costs associated with geographic relocation. In 2016, Ms. Liu received relocation-related benefits in the amount of $500 in connection with her 2015 relocation from Atlanta, Georgia to Pensacola, Florida. In 2016, Mr. Fletcher received relocation-related benefits in the amount of $12,059 in connection with his 2014 relocation from Atlanta to Pensacola. These amounts were for the shipment of household goods, incidental expenses related to the moves, and/or home sale and home repurchase assistance. Also, as provided in Gulf Power's relocation policy, tax assistance is provided on the taxable relocation benefits. If the named executive officer terminates within two years of relocation, these amounts must be repaid.

Other Perquisites includes financial planning, personal use of corporate aircraft, and other miscellaneous perquisites.
Financial planningis provided for most officers of Gulf Power, including all of the named executive officers. Gulf Power provides an annual subsidy of up to $8,200 to be used for financial planning, tax preparation fees, and estate planning. In the initial year, the maximum allowed amount is $13,200.
The Southern Company system has aircraft that are used to facilitate business travel. All flights on these aircraft must have a business purpose, except limited personal use that is associated with business travel is permitted for the President and Chief Executive Officer. Additionally, limited personal use related to relocation is permissible but must be approved. The amount reported for such personal use is the incremental cost of providing the benefit, primarily fuel costs. Also, if seating is available, Southern Company permits a spouse or other family member to accompany an employee on a flight. However, because in such cases the aircraft is being used for a business purpose, there is no incremental cost associated with the family travel, and no amounts are included for such travel. Any additional expenses incurred that are related to family travel are included.

Other miscellaneous perquisites reflects the full cost to Gulf Power of providing the following items: personal use of company-provided computers, personal use of company-provided tickets for sporting and other entertainment events, and gifts distributed to and activities provided to attendees at company-sponsored events.

GRANTS OF PLAN-BASED AWARDS IN 2016

This table provides information on short-term and long-term incentive compensation awards made in 2016.








Name
(a)







Grant
Date
(b)




Estimated Future Payouts Under Non-Equity Incentive Plan Awards




Estimated Future Payouts Under
Equity Incentive Plan Awards


Grant Date
Fair
Value of
Stock and
Option
Awards
($)
(i)
Threshold
($)
(c)
Target
($)
(d)
Maximum
($)
(e)
Threshold
(#)
(f)
Target
(#)
(g)
Maximum
(#)
(h)
S. W. Connally, Jr. 2,991
299,135
598,270
    
 2/8/2016   17217,159
34,318805,355
X. Liu 1,274
127,434
254,868
    
 2/8/2016   363,620
7,240169,904
J. R. Fletcher 1,170
117,031
234,062
    
 2/8/2016   323,166
6,332148,596
W. E. Smith 916
91,588
183,176
    
 2/8/2016   181,805
3,61084,719
B. C. Terry 1,269
126,948
253,896
    
 2/8/2016   373,690
7,380173,191

Columns (c), (d), and (e)

These columns reflect the annual Performance Pay Program opportunity granted to the named executive officers in 2016. The information shown as "Threshold," "Target," and "Maximum" reflects the range of potential payouts established by the Compensation Committee. The actual amounts earned for 2016 are included in column (g) of the Summary Compensation Table.

Columns (f), (g), and (h)

These columns reflect the performance shares granted to the named executive officers in 2016. The information shown as "Threshold," "Target," and "Maximum" reflects the range of potential shares that can be earned established by the Compensation Committee. Earned performance shares and accrued dividends will be paid out in Common Stock following the end of the 2016-2018 performance period, based on the extent to which the performance goals are achieved. Any shares not earned are forfeited.

Column (i)

This column reflects the aggregate grant date fair value of the performance shares granted in 2016. 50% of the value is based on the probable outcome of the performance conditions as of the grant date using a Monte Carlo simulation model ($45.19), while the other 50% is based on the closing price of the Common Stock on the grant date ($48.82). The assumptions used in calculating these amounts are discussed in Note 8 to the financial statements of Gulf Power in Item 8 herein.


OUTSTANDING EQUITY AWARDS AT 2016 FISCAL YEAR-END

This table provides information about stock options and stock awards (performance shares) as of December 31, 2016.
 Option AwardsStock Awards
Name
(a)
Number
of
Securities Underlying Unexercised Options
Exercisable
(#)
(b)

Number of Securities Underlying Unexercised Options
Unexercisable
(#)
(c)





Option Exercise Price
($)
(d)





Option Expiration Date
(e)
Equity Incentive Plan Awards: Number of Unearned Shares, Units or Other Rights That Have Not Vested
(#)
(f)
Equity Incentive Plan Awards: Market or Payout Value of Unearned Shares, Units or Other Rights That Have Not Vested
($)
(g)
S. W. Connally, Jr.
16,100
16,053
66,905
62,753


0
0
0
31,377


37.97
44.42
44.06
41.28


02/14/2021
02/13/2022
02/11/2023
02/10/2024


12,922
17,945
635,633
882,714
X. Liu
10,079
9,976
12,016
17,595


0
0
0
8,798


37.97
44.42
44.06
41.28


02/14/2021
02/13/2022
02/11/2023
02/10/2024


3,613
3,786
177,723
186,233
J. R.Fletcher05,121
41.28


02/10/2024


3,366
3,311
165,574
162,868
W. E. Smith
5,037
6,011
5,676


0
0
2,838


44.42
44.06
41.28


2/13/2022
2/11/2023
2/10/2024


1,908
1,888
93,854
92,871
B. C. Terry
18,163
21,719
0


0
0
9,892


44.42
44.06
41.28


02/13/2022
02/11/2023
02/10/2024


3,924
3,859
193,022
189,824

Columns (b), (c), (d), and (e)

Stock options were not granted in 2015 or 2016. Stock options vest one-third per year on the anniversary of the grant date. Options granted from 2011 through 2013 with expiration dates from 2021 through 2023 were fully vested as of December 31, 2016. Options granted in 2014 became fully vested on February 10, 2017 and expire on February 10, 2024.

Options also fully vest upon death, total disability, or retirement and expire three years following death or total disability, five years following retirement, or, if earlier, on the original expiration date.

Columns (f) and (g)

In accordance with SEC rules, column (f) reflects the target number of performance shares granted under the Performance Share Program that can be earned at the end of each three-year performance period (January 1, 2015 through December 31, 2017 and January 1, 2016 through December 31, 2018). The number of shares reflected in column (f) also reflects the deemed reinvestments of dividends on the target number of performance shares. Dividends are credited over the performance period but are only received at the end of the performance period if the underlying performance shares are earned.

The performance shares granted for the January 1, 2014 through December 31, 2016 performance period vested on December 31, 2016. Due to Southern Company's TSR performance relative to the selected peer group, no performance shares were paid out to any participants, including the named executive officers.

The value in column (g) is derived by multiplying the number of shares in column (f) by the Common Stock closing price on December 30, 2016 ($49.19). The ultimate number of shares earned, if any, will be based on the actual performance results at the end of each respective performance period.




OPTION EXERCISES AND STOCK VESTED IN 2016

 Option AwardsStock Awards


Name
(a)
Number of Shares Acquired on Exercise (#)
(b)

Value Realized on Exercise ($)
(c)
Number of Shares Acquired on Vesting (#)
(d)

Value Realized on Vesting ($)
(e)
S. W. Connally, Jr.14,392
321,805


X. Liu



J. R. Fletcher34,174
352,649


W. E. Smith



B. C. Terry38,358
466,326



Columns (b) and (c)

Column (b) reflects the number of shares acquired upon the exercise of stock options during 2016 and column (c) reflects the value realized. The value realized is the difference in the market price over the exercise price on the exercise date.

Columns (d) and (e)

While the performance shares granted for the January 1, 2014 through December 31, 2016 performance period vested on December 31, 2016, there were no shares paid out due to the level of performance relative to the selected peer group. No other stock awards vested in 2016 for the named executive officers.


PENSION BENEFITS AT 2016 FISCAL YEAR-END
NamePlan NameNumber of Years Credited Service (#)Present Value of Accumulated Benefit ($)
Payments During
Last Fiscal Year ($)
(a)(b)(c)(d)(e)
S.W. Connally, Jr.
Pension Plan
SBP-P
SERP
25.17
25.17
25.17
658,389
894,191
545,110
0
0
0
X. Liu
Pension Plan
SBP-P
SERP
16.92
16.92
16.92
455,857
130,662
172,855
0
0
0
J. R. Fletcher
Pension Plan
SBP-P
SERP
26.58
26.58
26.58
731,921
184,848
254,833
0
0
0
W. E. Smith
Pension Plan
SBP-P
SERP
29.17
29.17
29.17
726,236
142,898
230,814
0
0
0
B. C. Terry
Pension Plan
SBP-P
SERP
SRA
14.50
14.50
14.50
10.00
389,796
128,349
132,793
484,907
0
0
0
0

Pension Plan

The Pension Plan is a tax-qualified, funded plan. It is Southern Company's primary retirement plan. Substantially all employees participate in this plan after one year of service. Normal retirement benefits become payable when participants attain age 65 and complete five years of participation. The plan benefit equals the greater of amounts computed using a "1.7% offset formula" and a "1.25% formula," as described below. Benefits are limited to a statutory maximum.

The 1.7% offset formula amount equals 1.7% of final average pay times years of participation less an offset related to Social Security benefits. The offset equals a service ratio times 50% of the anticipated Social Security benefits in excess of $4,200. The service ratio adjusts the offset for the portion of a full career that a participant has worked. The highest three rates of payout of a participant's last

10 calendar years of service are averaged to derive final average pay. The rates of pay considered for this formula are the base salary rates with no adjustments for voluntary deferrals after 2008. A statutory limit restricts the amount considered each year; the limit for 2016 was $265,000.

The 1.25% formula amount equals 1.25% of final average pay times years of participation. For this formula, the final average pay computation is the same as above, but annual performance-based compensation earned each year is added to the base salary rates.

Early retirement benefits become payable once plan participants have, during employment, attained age 50 and completed 10 years of participation. Participants who retire early from active service receive benefits equal to the amounts computed using the same formulas employed at normal retirement. However, a 0.3% reduction applies for each month (3.6% for each year) prior to normal retirement that participants elect to have their benefit payments commence. For example, 64% of the formula benefits are payable starting at age 55. As of December 31, 2016, Mr. Fletcher and Mr. Smith were retirement-eligible.

The Pension Plan's benefit formulas produce amounts payable monthly over a participant's post-retirement lifetime. At retirement, plan participants can choose to receive their benefits in one of seven alternative forms of payment. All forms pay benefits monthly over the lifetime of the retiree or the joint lifetimes of the retiree and a beneficiary. A reduction applies if a retiring participant chooses a payment form other than a single life annuity. The reduction makes the value of the benefits paid in the form chosen comparable to what it would have been if benefits were paid as a single life annuity over the retiree's life.

Participants vest in the Pension Plan after completing five years of service. As of December 31, 2016, all of the named executive officers are vested in their Pension Plan benefits. Participants who terminate employment after vesting can elect to have their pension benefits commence at age 50 if they participated in the Pension Plan for 10 years. If such an election is made, the early retirement reductions that apply are actuarially determined factors and are larger than 0.3% per month.

Prior to January 1, 2017, if a participant died while actively employed and was either age 50 or vested in the Pension Plan as of date of death, benefits would have been payable to a beneficiary. For deaths occurring on or after January 1, 2017, a participant must be vested in the Pension Plan as of the date of death. After commencing, survivor benefits are payable monthly for the remainder of a survivor's life.

If participants become totally disabled, periods that Social Security or employer-provided disability income benefits are paid will count as service for benefit calculation purposes. The crediting of this additional service ceases at the point a disabled participant elects to commence retirement payments. Outside of this extra service crediting, the normal Pension Plan provisions apply to disabled participants.

The SBP-P

The SBP-P is an unfunded retirement plan that is not tax qualified. This plan provides high-paid employees any benefits that the Pension Plan cannot pay due to statutory pay/benefit limits. The SBP-P's vesting and early retirement provisions mirror those of the Pension Plan. Its disability provisions mirror those of the Pension Plan but cease upon a participant's separation from service.

The amounts paid by the SBP-P are based on the additional monthly benefit that the Pension Plan would pay if the statutory limits and pay deferrals were ignored. When a SBP-P participant separates from service, vested monthly benefits provided by the benefit formulas are converted into a single sum value. It equals the present value of what would have been paid monthly for an actuarially determined average post-retirement lifetime. The discount rate used in the calculation is based on the 30-year U.S. Treasury yields for the September preceding the calendar year of separation, but not more than six percent.

Vested participants terminating prior to becoming eligible to retire will be paid their single sum value as of September 1 following the calendar year of separation. If the terminating participant is retirement-eligible, the single sum value will be paid in 10 annual installments starting shortly after separation. The unpaid balance of a retiree's single sum will be credited with interest at the prime rate published in The Wall Street Journal. If the separating participant is a "key man" under Section 409A of the Internal Revenue Code, the first installment will be delayed for six months after the date of separation.

If a SBP-P participant dies after becoming vested in the Pension Plan, the beneficiary of the deceased participant will receive the installments the participant would have been paid upon retirement.

The SERP

The SERP is also an unfunded retirement plan that is not tax qualified. This plan provides high-paid employees additional benefits that the Pension Plan and the SBP-P would pay if the 1.7% offset formula calculations reflected a portion of annual performance-

based compensation. To derive the SERP benefits, a final average pay is determined reflecting participants' base rates of pay and their annual performance-based compensation amounts, whether or not deferred, to the extent they exceed 15% of those base rates (ignoring statutory limits). This final average pay is used in the 1.7% offset formula to derive a gross benefit. The Pension Plan and the SBP-P benefits are subtracted from the gross benefit to calculate the SERP benefit. The SERP's early retirement, survivor benefit, disability, and form of payment provisions mirror the SBP-P's provisions. However, except upon a change in control, SERP benefits do not vest until participants retire, so no benefits are paid if a participant terminates prior to becoming retirement-eligible. More information about vesting and payment of SERP benefits following a change in control is included under Potential Payments upon Termination or Change in Control. Effective January 1, 2016, participation in the SERP was closed to new participants.

SRA

Gulf Power also provides supplemental retirement benefits to certain employees that were first employed by Gulf Power, or an affiliate of Gulf Power, in the middle of their careers and generally provide for additional retirement benefits by giving credit for years of employment prior to employment with Gulf Power or one of its affiliates. These supplemental retirement benefits are also unfunded and not tax-qualified. Information about the SRA with Ms. Terry is included in the CD&A.

Pension Benefit Assumptions

The following assumptions were used in the present value calculations for all pension benefits:
lDiscount rate - 4.46% Pension Plan and 3.89% supplemental plans as of December 31, 2016,
lRetirement date - Normal retirement age (65 for all named executive officers),
lMortality after normal retirement - Adjusted RP-2014 mortality tables with generational projections,
lMortality, withdrawal, disability, and retirement rates prior to normal retirement - None,
lForm of payment for Pension Benefits:
oMale retirees: 25% single life annuity; 25% level income annuity; 25% joint and 50% survivor annuity; and 25% joint and 100% survivor annuity,
oFemale retirees: 50% single life annuity; 30% level income annuity; 15% joint and 50% survivor annuity; and 5% joint and 100% survivor annuity,
lSpouse ages - Wives two years younger than their husbands,
lAnnual performance-based compensation earned but unpaid as of the measurement date - 130% of target opportunity percentages times base rate of pay for year amount is earned, and
lInstallment determination - 3.75% discount rate for single sum calculation and 4.25% prime rate during installment payment period.

For all of the named executive officers, the number of years of credited service for the Pension Plan, the SBP-P, and the SERP is one year less than the number of years of employment.

NONQUALIFIED DEFERRED COMPENSATION AS OF 2016 FISCAL YEAR-END




Name
(a)

Executive Contributions
in Last FY
($)
(b)

Employer Contributions
in Last FY
($)
(c)

Aggregate Earnings
in Last FY
($)
(d)

Aggregate Withdrawals/
Distributions
($)
(e)


Aggregate Balance
at Last FYE
($)
(f)
S. W. Connally, Jr.27,23010,731
14,263
196,129
X. Liu47,249832
6,153
187,251
J. R. Fletcher


W. E. Smith69,4912,241
7,520
180,315
B. C. Terry99,004994
22,977
488,758

Southern Company provides the DCP, which is designed to permit participants to defer income as well as certain federal, state, and local taxes until a specified date or their retirement or other separation from service. Up to 50% of base salary and up to 100% of performance-based non-equity compensation may be deferred at the election of eligible employees. All of the named executive officers are eligible to participate in the DCP.


DCP participants have two options for the deemed investments of the amounts deferred - the Stock Equivalent Account and the Prime Equivalent Account. Under the terms of the DCP, participants are permitted to transfer between investments at any time.
The amounts deferred in the Stock Equivalent Account are treated as if invested at an equivalent rate of return to that of an actual investment in Common Stock, including the crediting of dividend equivalents as such are paid by Southern Company from time to time. It provides participants with an equivalent opportunity for the capital appreciation (or loss) and income of that of a Southern Company stockholder. During 2016, the rate of return in the Stock Equivalent Account was 9.99%.

Alternatively, participants may elect to have their deferred compensation deemed invested in the Prime Equivalent Account, which is treated as if invested at a prime interest rate compounded monthly, as published in The Wall Street Journal as the base rate on corporate loans posted as of the last business day of each month by at least 75% of the United States' largest banks. The interest rate earned on amounts deferred during 2016 in the Prime Equivalent Account was 3.59%.

Column (b)

This column reports the actual amounts of compensation deferred under the DCP by each named executive officer in 2016. The amount of salary deferred by the named executive officers, if any, is included in the Salary column in the Summary Compensation Table. The amounts of performance-based compensation deferred in 2016 were the amounts that were earned as of December 31, 2015 but not payable until the first quarter of 2016. These amounts are not reflected in the Summary Compensation Table because that table reports performance-based compensation that was earned in 2016 but not payable until early 2017. These deferred amounts may be distributed in a lump sum or in up to 10 annual installments at termination of employment or in a lump sum at a specified date, at the election of the participant.

Column (c)

This column reflects contributions under the SBP. Under the Internal Revenue Code, employer-matching contributions are prohibited under the ESP on employee contributions above stated limits in the ESP, and, if applicable, above legal limits set forth in the Internal Revenue Code. The SBP is a nonqualified deferred compensation plan under which contributions are made that are prohibited from being made in the ESP. The contributions are treated as if invested in Common Stock and are payable in cash upon termination of employment in a lump sum or in up to 20 annual installments, at the election of the participant. The amounts reported in this column also were reported in the All Other Compensation column in the Summary Compensation Table.

Column (d)

This column reports earnings or losses on compensation the named executive officers elected to defer and on employer contributions under the SBP.

Column (f)

This column includes amounts that were deferred under the DCP and contributions under the SBP in prior years and reported in Gulf Power's prior years' Annual Reports on Form 10-K. The following chart shows the amounts reported in Gulf Power's prior years' Annual Reports on Form 10-K.
  Amounts Deferred under the DCP Prior to 2016 and Reported in Prior Years' Annual Reports on Form 10-K Employer Contributions under the SBP Prior to 2016 and Reported in Prior Years' Annual Reports on Form 10-K Total 
Name  ($)   ($)  ($) 
S. W. Connally, Jr.  31,742
   26,830
  58,572
 
X. Liu  
   19
  19
 
J. R. Fletcher  
   
  
 
W. E. Smith  49,139
   1,563
  50,702
 
B. C. Terry  374,074
   2,186
  376,260
 


POTENTIAL PAYMENTS UPON TERMINATION OR CHANGE IN CONTROL

This section describes and estimates payments that could be made to the named executive officers serving as of December 31, 2016 under different termination and change-in-control events. The estimated payments would be made under the terms of Southern Company's compensation and benefit program or the change-in-control severance program. All of the named executive officers are participants in Southern Company's change-in-control severance program for officers. The amount of potential payments is calculated as if the triggering events occurred as of December 31, 2016 and assumes that the price of Common Stock is the closing market price on December 30, 2016.

Description of Termination and Change-in-Control Events
Different types of termination and change-in-control events that can affect the treatment of payments under the compensation and benefit programs are listed below. No payments are made under the change-in-control severance program unless, within two years of the change in control, the named executive officer is involuntarily terminated or voluntarily terminates for good reason.

Traditional Termination Events

Retirement or Retirement-Eligible - Termination of a named executive officer who is at least 50 years old and has at least 10 years of credited service.
Resignation - Voluntary termination of a named executive officer who is not retirement-eligible.
Lay Off - Involuntary termination of a named executive officer who is not retirement-eligible not for cause.
Involuntary Termination - Involuntary termination of a named executive officer for cause. Cause includes individual performance below minimum performance standards and misconduct, such as violation of the Company's Drug and Alcohol Policy.
Death or Disability - Termination of a named executive officer due to death or disability.

Change-in-Control-Related Events
At the Southern Company or Gulf Power level:
Southern Company Change-in-Control I - Consummation of an acquisition by another entity of 20% or more of Common Stock or, following consummation of a merger with another entity, Southern Company's stockholders own 65% or less of the entity surviving the merger.
Southern Company Change-in-Control II - Consummation of an acquisition by another entity of 35% or more of Common Stock or, following consummation of a merger with another entity, Southern Company's stockholders own less than 50% of Southern Company surviving the merger.
Southern Company Does Not Survive a Merger - Consummation of a merger or other event and Southern Company is not the surviving company or the Common Stock is no longer publicly traded.
Company Change-in-Control - Consummation of an acquisition by another entity, other than another subsidiary of Southern Company, of 50% or more of the stock of Gulf Power, consummation of a merger with another entity and Gulf Power is not the surviving company, or the sale of substantially all the assets of Gulf Power.

At the employee level:
Involuntary Change-in-Control Termination or Voluntary Change-in-Control Termination for Good Reason - Employment is terminated within two years of a change in control, other than for cause, or the employee voluntarily terminates for good reason. Good reason for voluntary termination within two years of a change in control generally is satisfied when there is a material reduction in salary, performance-based compensation opportunity, or benefits; relocation of over 50 miles; or a diminution in duties and responsibilities.


The following chart describes the treatment of different pay and benefit elements in connection with the Traditional Termination Events as described above.
Program

Retirement/
Retirement-
Eligible
Lay Off
(Involuntary
Termination
Not For Cause)
Resignation


Death or
Disability

Involuntary
Termination
(For Cause)
Pension Benefits Plans
Benefits payable
as described in the notes following
the Pension
Benefits table.
Benefits payable as described in the notes following the Pension Benefits table.Benefits payable as described in the notes following the Pension Benefits table.Benefits payable as described in the notes following the Pension Benefits table.Benefits payable as described in the notes following the Pension Benefits table.
Annual Performance Pay Program
Prorated if
before 12/31.
Prorated if
before 12/31.
Forfeit.
Prorated if
before 12/31.
Forfeit.
Stock OptionsVest; expire earlier of original expiration date or five years.Vested options expire in 90 days; unvested are forfeited.Vested options expire in 90 days; unvested are forfeited.Vest; expire earlier of original expiration date or three years.Forfeit.
Performance SharesNo proration if retirement prior to end of performance period. Will receive full amount actually earned.Forfeit.Forfeit.
Death - prorated based on number of months employed during performance period.
Disability - not affected. Will receive full amount actually earned.
Forfeit.
Financial
Planning Perquisite
Continues for one year.Terminates.Terminates.Continues for one year.Terminates.
DCP
Payable per prior elections (lump
sum or up to 10 annual installments).
Payable per prior elections (lump
sum or up to 10 annual installments).
Payable per prior elections (lump
sum or up to 10 annual installments).
Payable to beneficiary or participant per prior elections. Amounts deferred prior to 2005 can be paid as a lump sum per the benefit administration committee's discretion.
Payable per prior elections (lump
sum or up to 10 annual installments).
SBP - non-pension related
Payable per prior elections (lump
sum or up to 20 annual installments).
Payable per prior elections (lump
sum or up to 20 annual installments).
Payable per prior elections (lump
sum or up to 20 annual installments).
Payable to beneficiary or participant per prior elections. Amounts deferred prior to 2005 can be paid as a lump sum per the benefit administration committee's discretion.
Payable per prior elections (lump
sum or up to 20 annual installments).



The following chart describes the treatment of payments under compensation and benefit programs under different change-in-control events, except the Pension Plan. The Pension Plan is not affected by change-in-control events.

Program
Southern Company
Change in Control I
Southern Company
Change in Control II
Southern Company
Does Not Survive Merger or
Gulf Power Change in
Control
Involuntary Change-in-
Control-Related Termination or Voluntary
Change-in-Control-Related
Termination for Good Reason
Nonqualified Pension Benefits
(except SRA)
All SERP-related benefits vest if participants vested in tax-qualified pension benefits; otherwise, no impact. SBP-P benefits vest for all participants and single sum value of benefits earned to change-in-control date paid following termination or retirement.Benefits vest for all participants and single sum value of benefits earned to the change-in-control date paid following termination or retirement.Benefits vest for all participants and single sum value of benefits earned to the change-in-control date paid following termination or retirement.Based on type of change-in-control event.
SRANot affected.Not affected.Not affected.Vest.
Annual Performance Pay Program
If no program
termination, paid at greater of target or actual performance. If program terminated within two years of change in control, prorated at target performance level.
If no program
termination, paid at greater of target or actual performance. If program terminated within two years of change in control, prorated at target performance level.
Prorated at target performance level.If not otherwise eligible for payment, if the program is still in effect, prorated at target performance level.
Stock OptionsNot affected.Not affected.Vest and convert to surviving company's securities; if cannot convert, pay spread in cash.Vest.
Performance SharesNot affected.Not affected.Vest and convert to surviving company's securities; if cannot convert, pay spread in cash.Vest.
DCPNot affected.Not affected.Not affected.Not affected.
SBPNot affected.Not affected.Not affected.Not affected.
Severance BenefitsNot applicable.Not applicable.Not applicable.One or two times base salary plus target annual performance-based pay.
Healthcare BenefitsNot applicable.Not applicable.Not applicable.Up to five years participation in group healthcare plan plus payment of two or three years' premium amounts.
Outplacement ServicesNot applicable.Not applicable.Not applicable.Six months.


Potential Payments

This section describes and estimates payments that would become payable to the named executive officers upon a termination or change in control as of December 31, 2016.


Pension Benefits
The amounts that would have become payable to the named executive officers if the Traditional Termination Events occurred as of December 31, 2016 under the Pension Plan, the SBP-P, the SERP, and, if applicable, an SRA are itemized in the following chart. The amounts shown under the Retirement column are amounts that would have become payable to the named executive officers that were retirement-eligible on December 31, 2016 and are the monthly Pension Plan benefits and the first of 10 annual installments from the SBP-P and the SERP. The amounts shown under the Resignation or Involuntary Termination column are the amounts that would have become payable to the named executive officers who were not retirement-eligible on December 31, 2016 and are the monthly Pension Plan benefits that would become payable as of the earliest possible date under the Pension Plan and the single sum value of benefits earned up to the termination date under the SBP-P, paid as a single payment rather than in 10 annual installments. Benefits under the SERP would be forfeited. The amounts shown that are payable to a spouse in the event of the death of the named executive officer are the monthly amounts payable to a spouse under the Pension Plan and the first of 10 annual installments from the SBP-P and the SERP.

The amounts in this chart are very different from the pension values shown in the Summary Compensation Table and the Pension Benefits table. Those tables show the present values of all the benefit amounts anticipated to be paid over the lifetimes of the named executive officers and their spouses. Those plans are described in the notes following the Pension Benefits table. Only Mr. Fletcher and Mr. Smith were retirement-eligible on December 31, 2016. The SRA for Ms. Terry contains an additional service requirement for benefit eligibility which was not met as of December 31, 2016. Therefore, she was not eligible to receive retirement benefits under the agreement. However, death benefits would be paid to her surviving spouse.
NameRetirement ($)Resignation or Involuntary Termination ($)Death (payments to a spouse) ($) 
S. W. Connally, Jr.Pensionn/a2,830 4,240
 
 SBP-Pn/a1,135,437 122,294
 
 SERPn/a 74,552
 
X. LiuPensionn/a1,884 2,849
 
 SBP-Pn/a166,291 18,041
 
 SERPn/a 23,867
 
J. R. FletcherPension4,144All plans treated as retiring 3,882
 
 SBP-P23,062 23,062
 
 SERP31,794 31,794
 
W. E. SmithPension4,247All plans treated as retiring 3,641
 
 SBP-P18,189 18,189
 
 SERP29,380 29,380
 
B. C. TerryPensionn/a1,628 2,463
 
 SBP-Pn/a163,196 17,892
 
 SERPn/a 18,511
 
 SRAn/a 67,596
 

As described in the Change-in-Control chart, the only change in the form of payment, acceleration, or enhancement of the pension benefits is that the single sum value of benefits earned up to the change-in-control date under the SBP-P, the SERP, and the SRA could be paid as a single payment rather than in 10 annual installments. Also, the SERP benefits vest for participants who are not retirement-eligible upon a change in control. Estimates of the single sum payment that would have been made to the named executive officers, assuming termination as of December 31, 2016 following a change-in-control-related event, other than a Southern Company Change-in-Control I (which does not impact how pension benefits are paid), are itemized below. These amounts would be paid instead of the benefits shown in the Traditional Termination Events chart above; they are not paid in addition to those amounts.


Name SBP-P ($) SERP ($)SRA ($)Total ($)  
S. W. Connally, Jr.  1,116,343    680,537    1,796,880  
X. Liu  163,495    216,289    379,784  
J. R. Fletcher  230,621    317,936    548,557  
W. E. Smith  181,892    293,798    475,690  
B. C. Terry  160,452    166,007  606,192  932,651  

The pension benefit amounts in the tables above were calculated as of December 31, 2016 assuming payments would begin as soon as possible under the terms of the plans. Accordingly, appropriate early retirement reductions were applied. Any unpaid annual performance-based compensation was assumed to be paid at 1.30 times the target level. Pension Plan benefits were calculated assuming each named executive officer chose a single life annuity form of payment, because that results in the greatest monthly benefit. The single sum values were based on a 2.95 % discount rate.

Annual Performance Pay Program
The amount payable if a change in control had occurred on December 31, 2016 is the greater of target or actual performance. Because actual payouts for 2016 performance were above the target level for all of the named executive officers, the amount that would have been payable to the named executive officers was the actual amount paid as reported in the Summary Compensation Table.

Stock Optionsand Performance Shares (Equity Awards)
Equity Awards would be treated as described in the Termination and Change-in-Control charts above. If Southern Company consummates a merger and is not the surviving company, all Equity Awards vest. However, there is no payment associated with Equity Awards in that situation unless the participants' Equity Awards cannot be converted into surviving company awards. In that event, the value of outstanding Equity Awards would be paid to the named executive officers. In addition, if there is an Involuntary Change-in-Control Termination or Voluntary Change-in-Control Termination for Good Reason, Equity Awards vest.

For stock options, the value is the excess of the exercise price and the closing price of Common Stock on December 30, 2016. The value of performance shares is calculated using the closing price of Common Stock on December 30, 2016.

The chart below shows the number of stock options for which vesting would be accelerated and the amount that would be payable if there were no conversion to the surviving company's stock options. It also shows the number and value of performance shares that would be paid.

  Total Number of 
 Number of EquityEquity AwardsTotal Payable in
 Awards withFollowingCash without
 Accelerated Vesting (#)Accelerated Vesting (#)Conversion of
 StockPerformance StockPerformance Equity
NameOptionsShares OptionsShares Awards ($)
S. W. Connally, Jr.31,377
30,867
 193,188
30,867
 2,863,353
X. Liu8,798
7,399
 58,464
7,399
 795,039
J. R. Fletcher5,121
6,677
 5,121
6,677
 368,949
W. E. Smith2,838
3,796
 19,562
3,796
 308,934
B. C. Terry9,892
7,783
 49,774
7,783
 659,147


DCP and SBP
The aggregate balances reported in the Nonqualified Deferred Compensation table would be payable to the named executive officers as described in the Traditional Termination and Change-in-Control-Related Events charts above. There is no enhancement or acceleration of payments under these plans associated with termination or change-in-control events, other than the lump-sum payment opportunity described in the above charts. The lump sums that would be payable are those that are reported in the Nonqualified Deferred Compensation table.


Healthcare Benefits
Mr. Smith and Mr. Fletcher are the only named executive officers who were retirement-eligible as of December 31, 2016. Healthcare benefits are provided to retirees, and there is no incremental payment associated with the termination or change-in-control events, except in the case of a change-in-control-related termination, as described in the Change-in-Control-Related Events chart. Because the other named executive officers were not retirement-eligible, healthcare benefits would not become available until each reaches age 50, except in the case of a change-in-control-related termination, as described in the Change-in-Control-Related Events chart.

The estimated cost of providing Ms. Liu and Ms. Terry two years of healthcare insurance premiums is approximately $19,391 and $11,772, respectively. The estimated cost of providing Mr. Connally three years of healthcare insurance premiums is approximately $47,656.

Financial Planning Perquisite
An additional year of the financial planning perquisite, which is set at a maximum of $8,200 per year, will be provided after retirement for retirement-eligible named executive officers.

There are no other perquisites provided to the named executive officers under any of the traditional termination or change-in-control-related events.

Severance Benefits
The named executive officers are participants in a change-in-control severance plan. The plan provides severance benefits, including outplacement services, if within two years of a change in control, they are involuntarily terminated, not for cause, or they voluntarily terminate for good reason. The severance benefits are not paid unless the named executive officer releases the employing company from any claims he or she may have against the employing company.
As of December 31, 2016, the severance payment was two times the base salary and target payout under the annual Performance Pay Program for Mr. Connally and one times the base salary and target payout under the annual Performance Pay Program for the other named executive officers.
The estimated cost of providing the six months of outplacement services is $6,000 per named executive officer.
If any portion of the severance amount constitutes an "excess parachute payment" under Section 280G of the Internal Revenue Code and is therefore subject to an excise tax, the severance amount will be reduced unless the after-tax "unreduced amount" exceeds the after-tax "reduced amount." Excise tax gross-ups will not be provided on change-in-control severance payments.

The table below estimates the severance payments that would be made to the named executive officers if they were terminated as of December 31, 2016 in connection with a change in control.
NameSeverance Amount ($)
S. W. Connally, Jr.1,518,687
X. Liu410,622
J. R. Fletcher377,098
W. E. Smith320,558
B. C. Terry409,056


DIRECTOR COMPENSATION
Only non-employee directors of Gulf Power are compensated for service on the board of directors.
During 2016, the pay components for non-employee directors were:
Annual cash retainer:$22,000 per year
Annual stock retainer:$19,500 per year in Common Stock
Board meeting fees:If more than five meetings are held in a calendar year, $1,200 will be paid for participation beginning with the sixth meeting.
Committee meeting fees:If more than five meetings of any one committee are held in a calendar year, $1,000 will be paid for participation in each meeting of that committee beginning with the sixth meeting.
DIRECTOR DEFERRED COMPENSATION PLAN
Any deferred quarterly equity grants or stock retainers are required to be deferred in the Deferred Compensation Plan For Outside Directors of Gulf Power Company (Director Deferred Compensation Plan) and are invested in Common Stock units which earn dividends as if invested in Common Stock. Earnings are reinvested in additional stock units. Upon leaving the board, distributions are made in shares of Common Stock or cash.
In addition, directors may elect to defer up to 100% of their remaining compensation in the Director Deferred Compensation Plan until membership on the board ends. Deferred compensation may be invested as follows, at the director's election:
in Common Stock units which earn dividends as if invested in Common Stock and are distributed in shares of Common Stock or cash upon leaving the board; or
at the prime interest rate which is paid in cash upon leaving the board.
All investments and earnings in the Director Deferred Compensation Plan are fully vested and, at the election of the director, may be distributed in a lump sum payment or in up to 10 annual distributions after leaving the board. A grantor trust has been established that primarily holds Common Stock that funds the Common Stock units that are distributed in shares of Common Stock. Directors have voting rights in the shares held in the trust attributable to these units.

DIRECTOR COMPENSATION TABLE
The following table reports all compensation to Gulf Power's non-employee directors during 2016, including amounts deferred in the Director Deferred Compensation Plan. Non-employee directors do not receive non-equity incentive plan compensation or stock option awards, and there is no pension plan for non-employee directors.
Name
Fees Earned or Paid in Cash
($)(1)
Stock
Awards
($)(2)
All Other Compensation 
($)(3)
Total
($)
Allan G. Bense22,00019,50010041,600
Deborah H. Calder22,00019,50010041,600
William C. Cramer, Jr.22,00019,50010041,600
Julian B. MacQueen22,00019,50010041,600
J. Mort O'Sullivan III22,00019,50010041,600
Michael T. Rehwinkel22,00019,50010041,600
Winston E. Scott22,00019,50010041,600
(1)Includes amounts voluntarily deferred in the Director Deferred Compensation Plan.
(2)Includes fair market value of equity grants on grant dates. All such stock awards are vested immediately upon grant.
(3)Includes value of charitable contribution made in each director's name.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
The Compensation Committee is made up of independent directors of Southern Company who have never served as executive officers of Southern Company or Gulf Power. During 2016, none of Southern Company's or Gulf Power's directors or executive officers served on the board of directors of any entities whose executive officers serve on the Compensation Committee.



ITEM 12.SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS
Security Ownership (Applicable to Gulf Power only).
Security Ownership of Certain Beneficial Owners. Southern Company is the beneficial owner of 100% of the outstanding common stock of Gulf Power. The number of outstanding shares reported in the table below is as of January 31, 2017.

Title of Class
Name and Address
of Beneficial
Owner
Amount and
Nature of
Beneficial
Ownership
Percent
of
Class
Common Stock
The Southern Company
30 Ivan Allen Jr. Boulevard, N.W.
Atlanta, Georgia 30308
100%
Registrant:
Gulf Power
7,392,717
Security Ownership of Management. The following table shows the number of shares of Common Stock of Southern Company owned by the directors, nominees, and executive officers of Gulf Power as of December 31, 2016. It is based on information furnished by the directors, nominees, and executive officers. The shares beneficially owned by all directors, nominees, and executive officers as a group constitute less than one percent of the total number of shares of Common Stock of Southern Company outstanding on December 31, 2016.

   Shares Beneficially Owned Include:
Name of Directors,
Nominees, and
Executive Officers
Shares
Beneficially
Owned (1)
 
Deferred Stock
Units (2)
 
Shares
Individuals
Have Rights
to Acquire
Within 60
Days (3)
Shares Held By Family Member (4)
S. W. Connally, Jr.209,213
 0
 193,188
0
Allan G. Bense11,240
 0
 0
0
Deborah H. Calder3,482
 2,929
 0
0
William C. Cramer, Jr.20,567
 20,567
 0
0
Julian B. MacQueen1,919
 0
 0
0
J. Mort O'Sullivan III5,226
 5,226
 0
0
Michael T. Rehwinkel1,489
 0
 0
0
Winston E. Scott8,622
 0
 0
0
Jim R. Fletcher12,225
 0
 5,121
0
Xia Liu63,406
 0
 58,464
0
Wendell E. Smith24,230
 0
 19,562
0
Bentina C. Terry60,554
 0
 49,774
633
Directors, Nominees, and Executive Officers as a group (13 people)467,903
 28,722
 355,408
633
(1)"Beneficial ownership" means the sole or shared power to vote, or to direct the voting of, a security and/or investment power with respect to a security or any combination thereof.
(2)Indicates the number of deferred stock units held under the Director Deferred Compensation Plan.
(3)Indicates shares of Common Stock that certain executive officers have the right to acquire within 60 days. Shares indicated are included in the Shares Beneficially Owned column.
(4)Shares indicated are included in the Shares Beneficially Owned column.
Changes in Control. Southern Company and Gulf Power know of no arrangements which may at a subsequent date result in any change in control.


ITEM 13.CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE.
Transactions with Related Persons.
In 2016, Mr. Antonio Terry, the spouse of Ms. Bentina Terry, an executive officer of Gulf Power, was employed by Gulf Power as a Senior Engineer and received compensation of $134,076.
Review, Approval or Ratification of Transactions with Related Persons.
Gulf Power does not have a written policy pertaining solely to the approval or ratification of "related party transactions" and has a robust system for identifying potential related party transactions.
The Southern Company Audit Committee is responsible for overseeing the Code of Ethics, which includes policies relating to conflicts of interest. The Code of Ethics requires that all employees and directors avoid conflicts of interest, defined as situations where the person's private interests conflict, or even appear to conflict, with the interests of Southern Company as a whole.
Southern Company also has a Contract Manual and other formal written procurement policies and procedures that guide the purchase of goods and services, including requiring competitive bids for purchases of materials for $10,000 and above and for purchases of services for $25,000 and above or approval based on documented business needs for sole sourcing arrangements.
At least annually, each director and executive officer completes a detailed questionnaire that asks about any business relationship that may give rise to a conflict of interest and all transactions in which the Southern Company or a subsidiary is involved and in which the executive officer, director, or a related party has a direct or indirect material interest.
Southern Company also conducts a review of financial systems to identify potential conflicts of interest and related party transactions.
The approval and ratification of any related party transactions would be subject to these written policies and procedures which include:
A determination of the need for the goods and services;
Preparation and evaluation of requests for proposals by the lead support organization;
The writing of contracts;
Controls and guidance regarding the evaluation of the proposals; and
Negotiation of contract terms and conditions.
As appropriate, these contracts are also reviewed by individuals in the legal, accounting, and/or risk management/services departments prior to being approved by the responsible individual. The responsible individual will vary depending on the department requiring the goods and services, the dollar amount of the contract, and the appropriate individual within that department who has the authority to approve a contract of the applicable dollar amount.
In the ordinary course of the Southern Company system's business, electricity is provided to some directors and entities with which the directors are associated on the same terms and conditions as provided to other customers of the Southern Company system.
Director Independence.
The board of directors of Gulf Power consists of seven non-employee directors (Ms. Deborah H. Calder and Messrs. Allan G. Bense, William C. Cramer, Jr., Julian B. MacQueen, J. Mort O'Sullivan, III, Michael T. Rehwinkel, and Winston E. Scott) and Mr. Connally.



ITEM 14.PRINCIPAL ACCOUNTANT FEES AND SERVICES
The following represents the fees billed to GulfGeorgia Power, Mississippi Power, Southern Power, and Southern Power for the last two fiscal yearsCompany Gas in 2019 and 2018 by Deloitte & Touche LLP, each company's principal public accountant for 2016 and 2015:
accountant:
2016 20152019 2018
(in thousands)(in thousands)
Gulf Power   
Georgia Power   
Audit Fees (1)$1,346
 $1,359
$3,405
 $3,605
Audit-Related Fees3
 2
Audit-Related Fees (2)
32
 31
Tax Fees
 

 
All Other Fees (2)2
 1
All Other Fees (3)
18
 8
Total$3,455
 $3,644
Mississippi Power   
Audit Fees (1)
$1,382
 $1,371
Audit-Related Fees (2)
69
 79
Tax Fees
 
All Other Fees (3)
10
 
Total$1,351
 $1,362
$1,461
 $1,450
Southern Power      
Audit Fees (1)$1,817
 $1,478
$1,828
 $1,795
Audit-Related Fees372
 3
Audit-Related Fees(4)
1,418
 1,017
Tax Fees
 

 
All Other Fees (2)6
 5
All Other Fees (3)
16
 13
Total$2,195
 $1,486
$3,262
 $2,825
Southern Company Gas   
Audit Fees (1)(5)
$4,602
 $3,622
Audit-Related Fees (6)
254
 520
Tax Fees
 
All Other Fees (3)
5
 7
Total$4,861
 $4,149
(1)Includes services performed in connection with financing transactions.
(2)Represents registration fees for attendance at Deloitte & Touche LLP-sponsored education seminars in 2015 and 2016 and subscription fees for Deloitte & Touche LLP's technical accounting research tool in 2015.

The following represents the fees billed to Southern Company Gas for the last two fiscal years by PricewaterhouseCoopers LLP, Southern Company Gas' principal public accountant for 2015 and through February 11, 2016, and Deloitte & Touche LLP, Southern Company Gas' principal public accountant since February 11, 2016:

 2016 2015
 (in thousands)
    
Audit Fees (1)$5,131
 $3,967
Audit-Related Fees (2)59
 88
Tax Fees (3)65
 75
All Other Fees (4)7
 
Total$5,262
 $4,130

(1)Includes fees for services performed in connection with financing transactions billed by Deloitte & Touche LLP in 2016 and PricewaterhouseCoopers LLP in 2015. Also includes fees for audits of several subsidiaries by Deloitte & Touche LLP in 2016 and PricewaterhouseCoopers LLP in 2015.
(2)Represents fees for a review report on internal controls provided to third parties billed by Deloitte & Touche LLP in 2016 and PricewaterhouseCoopers LLP in 2015.non-statutory audit services.
(3)Represents fees billed by Deloitte & Touche LLP for tax compliance services in 2016 and PricewaterhouseCoopers LLP for tax compliance, planning, and advisory services in 2015.
(4)Represents registration fees for attendance at Deloitte & Touche LLP-sponsored education seminarsseminars.
(4)Represents fees in 2016 and subscriptionconnection with audits of Southern Power partnerships.
(5)Includes fees in connection with statutory audits of several Southern Company Gas subsidiaries.
(6)Represents fees for Deloitte & Touche LLP's technical accounting research toolnon-statutory audit services in 2016.2019 and 2018 and a review report on internal controls in 2018.

The Southern Company Audit Committee (on behalf of Southern Company and its subsidiaries) adoptedhas a Policy of Engagement of the Independent Auditor for Audit and Non-Audit Services that includes pre-approval requirements for such Audit Committee to pre-approvethe audit and non-audit services provided by Deloitte & Touche LLP. All of the audit services provided

by Deloitte & Touche LLP in fiscal years 20162019 and 2015 (described in the footnotes to the table above)2018 and related fees were approved in advance by the Southern Company Audit Committee.

Prior to the closing of the Merger, the Southern Company Gas Audit Committee had responsibility for appointing, setting compensation, and overseeing the work of Southern Company Gas' independent registered public accounting firm. In recognition of this responsibility, Southern Company Gas' Audit Committee adopted a policy that required specific Audit Committee approval before any services were provided by the independent registered public accounting firm. All of the audit services provided by PricewaterhouseCoopers LLP in fiscal year 2015 and PricewaterhouseCoopers LLP and Deloitte & Touche LLP in fiscal year 2016 (described in the footnotes to the table above) prior to the closing of the Merger and related fees were approved in advance by the Southern Company Gas Audit Committee.


PART IV
Item 15.EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
(a)The following documents are filed as a part of this report on Form 10-K:
(1)Financial Statements and Financial Statement Schedules:
Management's ReportReports on Internal Control Over Financial Reporting for Southern Company and Subsidiary Companies, is listed under Item 8 herein.
Management's Report on Internal Control Over Financial Reporting for Alabama Power, is listed under Item 8 herein.
Management's Report on Internal Control Over Financial Reporting for Georgia Power, is listed under Item 8 herein.
Management's Report on Internal Control Over Financial Reporting for Gulf Power is listed under Item 8 herein.
Management's Report on Internal Control Over Financial Reporting for Mississippi Power, is listed under Item 8 herein.
Management's Report on Internal Control Over Financial Reporting for Southern Power and Subsidiary Companies, is listed under Item 8 herein.
Management's Report on Internal Control Over Financial Reporting forand Southern Company Gas and Subsidiary Companies isare listed under Item 89A herein.
Reports of Independent Registered Public Accounting Firm on the financial statements and financial statement schedules for Southern Company and Subsidiary Companies, Alabama Power Company, Georgia Power GulfCompany, Mississippi Power MississippiCompany, Southern Power Company and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies, as well as the Report of Independent Registered Public Accounting Firm on the financial statements of Southern Power and Subsidiary Companies are listed under Item 8 herein.
The financial statements filed as a part of this report for Southern Company and Subsidiary Companies, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed under Item 8 herein.
Reports of Independent Registered Public Accounting Firm on the financial statement schedules for Southern Company and Subsidiary Companies, Alabama Power Company, Georgia Power Company, Mississippi Power Company, Southern Power Company and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed in the Index to the Financial Statement Schedules at page S-1.
The financial statement schedules for Southern Company and Subsidiary Companies, Alabama Power, Georgia Power, GulfMississippi Power, MississippiSouthern Power and Subsidiary Companies, and Southern Company Gas and Subsidiary Companies are listed in the Index to the Financial Statement Schedules at page S-1.
The financial statements of Southern Natural Gas Company, L.L.C. as of December 31, 20162019 and 2018 and for the four monthsyears ended December 31, 20162019, 2018, and 2017 are provided by Southern Company Gas as separate financial statements of subsidiaries not consolidated pursuant to Rule 3-09 of Regulation S-X, and are incorporated by reference herein from Exhibit 99(g) hereto.
(2)Exhibits:
Exhibits for Southern Company, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power, and Southern Company Gas are listed in the Exhibit Index at page E-1.


Item 16.FORM 10-K SUMMARY
Item 16. FORM 10-K SUMMARY


None.




INDEX TO FINANCIAL STATEMENT SCHEDULES
Schedules I through V not listed above are omitted as not applicable or not required. Columns omitted from schedules filed have been omitted because the information is not applicable or not required.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and Southern Company's internal control over financial reporting as of December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company (Page S-8) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Alabama Power (Page S-9) listed in the Index at Item 15. This financial statement schedule is the responsibility of Alabama Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Georgia Power (Page S-10) listed in the Index at Item 15. This financial statement schedule is the responsibility of Georgia Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Mississippi Power (Page S-11) listed in the Index at Item 15. This financial statement schedule is the responsibility of Mississippi Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Power (Page S-12) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company Gas (Page S-13) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


THE SOUTHERN COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions      
DescriptionBalance at Beginning of Period Charged to Income Charged to Other Accounts  Deductions 
Reclassified to Held for Sale(c)
 Balance at End of Period
Provision for uncollectible accounts(a)
            
2019$50
 $68
 $
  $69
 $
 $49
201844
 69
 (1)  61
 1
 50
201743
 56
 
  55
 
 44
Tax valuation allowance (net state)(b)
            
2019$100
 $13
 $
  $
 $
 $113
2018148
 (38) 
  10
 
 100
201722
 126
 
  
 
 148
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized. This valuation allowance was reduced in 2018 as a result of higher projected state taxable income. In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, as a result of lower projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.
(c)
Represents provision for uncollectible accounts at Gulf Power presented on Southern Company's balance sheet at December 31, 2018 as assets held for sale, current. See Note 15 to the financial statements under "Southern Company" and "Assets Held for Sale" in Item 8 herein for additional information.

ALABAMA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts 
Deductions(*)
 
Balance at
End of Period
Provision for uncollectible accounts         
2019$10
 $24
 $
 $12
 $22
20189
 13
 
 12
 10
201710
 10
 
 11
 9
(*)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.

GEORGIA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Provision for uncollectible accounts(a)
         
2019$2
 $13
 $
 $13
 $2
20183
 11
 
 12
 2
20173
 11
 
 11
 3
Tax valuation allowance (net state)(b)
         
2019$33
 $(5) $
 $
 $28
2018
 39
 
 6
 33
2017
 
 
 
 
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, which was reduced in 2019 as a result of higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.


MISSISSIPPI POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Provision for uncollectible accounts(a)
         
2019$1
 $2
 $
 $2
 $1
20181
 1
 
 1
 1
2017
 2
 
 1
 1
Tax valuation allowance (net state)(b)
         
2019$32
 $
 $
 $
 $32
2018124
 (92) 
 
 32
2017
 124
 
 
 124
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized, which was reduced in 2018 as a result of higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.

SOUTHERN POWER COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Tax valuation allowance (net state)         
2019$22
 $7
 $
 $
 $29
201810
 12
 
 
 22
2017
 10
 
 
 10




SOUTHERN COMPANY GAS AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts Deductions 
Balance at
End of Period
Provision for uncollectible accounts(a)
         
2019$30
 $29
 $
 $41
 $18
201828
 33
 (1) 30
 30
201727
 28
 
 27
 28
Tax valuation allowance (net state)(b)
         
2019$12
 $(8) $
 $
 $4
201811
 1
 
 
 12
201719
 
 
 8
 11
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)
In 2019, Southern Company Gas reversed a $13 million valuation allowance for a federal deferred tax asset in connection with the sale of Triton. Additionally, in 2019, a $5 million valuation allowance was established for a state net operating loss carryforward expected to expire prior to being fully utilized. See Note 10 to the financial statements and Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.

EXHIBIT INDEX
The exhibits below with an asterisk (*) preceding the exhibit number are filed herewith. The remaining exhibits have previously been filed with the SEC and are incorporated herein by reference. The exhibits marked with a pound sign (#) are management contracts or compensatory plans or arrangements required to be identified as such by Item 15 of Form 10-K.
(2)Plan of acquisition, reorganization, arrangement, liquidation or succession
Southern Company
(a)1
Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. (Designated in Form 8-K dated August 23, 2015, File No. 1-3526, as Exhibit 2.1.)
(a)2
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company, 700 Universe, LLC, and NextEra Energy and Amendment No. 1 thereto dated as of January 1, 2019. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)1 and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 2(a)3.)
(a)3
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company Gas, NUI Corporation, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)2.)
(a)4
Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)3.)
Southern Power
(e)1Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. See Exhibit 2(a)4 herein.
(e)2
Membership Interest Purchase Agreement, dated as of April 17, 2019, by and between Southern Power and The City of Austin d/b/a Austin Energy. (Designated in Form 8-K dated June 13, 2019, File No. 001-37803, as Exhibit 2.1.)
(e)3
Letter Agreement, dated as of May 24, 2019, by and between Southern Power and The City of Austin d/b/a Austin Energy. (Designated in Form 8-K dated June 13, 2019, File No. 001-37803, as Exhibit 2.2.)
Southern Company Gas
(f)1Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. See Exhibit 2(a)1 herein.
(f)2
Purchase and Sale Agreement, dated as of July 10, 2016, among Kinder Morgan SNG Operator LLC, Southern Natural Gas Company, L.L.C., and Southern Company.(Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1a.)
(f)3
Assignment, Assumption and Novation of Purchase and Sale Agreement, dated as of August 31, 2016, between Southern Company and Evergreen Enterprise Holdings LLC. (Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1b.)
(3)Articles of Incorporation and By-Laws
Southern Company
(a)1
Restated Certificate of Incorporation of Southern Company, dated February 12, 2019. (Designated in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 3(a)1.)
(a)2
Amended and Restated By-laws of Southern Company effective December 9, 2019, and as presently in effect. (Designated in Form 8-K dated December 9, 2019, File No. 1-3526, as Exhibit 3.1.)

Alabama Power
(b)1
Charter of Alabama Power and amendments thereto through September 7, 2017. (Designated in Registration Nos. 2-59634 as Exhibit 2(b), 2-60209 as Exhibit 2(c), 2-60484 as Exhibit 2(b), 2-70838 as Exhibit 4(a)-2, 2-85987 as Exhibit 4(a)-2, 33-25539 as Exhibit 4(a)-2, 33-43917 as Exhibit 4(a)-2, in Form 8-K dated February 5, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated July 8, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated October 27, 1993, File No. 1-3164, as Exhibits 4(a) and 4(b), in Form 8-K dated November 16, 1993, File No. 1-3164, as Exhibit 4(a), in Certificate of Notification, File No. 70-8191, as Exhibit A, in Form 10-K for the year ended December 31, 1997, File No. 1-3164, as Exhibit 3(b)2, in Form 8-K dated August 10, 1998, File No. 1-3164, as Exhibit 4.4, in Form 10-K for the year ended December 31, 2000, File No. 1-3164, as Exhibit 3(b)2, in Form 10-K for the year ended December 31, 2001, File No. 1-3164, as Exhibit 3(b)2, in Form 8-K dated February 5, 2003, File No. 1-3164, as Exhibit 4.4, in Form 10-Q for the quarter ended March 31, 2003, File No 1-3164, as Exhibit 3(b)1, in Form 8-K dated February 5, 2004, File No. 1-3164, as Exhibit 4.4, in Form 10-Q for the quarter ended March 31, 2006, File No. 1-3164, as Exhibit 3(b)(1), in Form 8-K dated December 5, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated September 12, 2007, File No. 1-3164, as Exhibit 4.5, in Form 8-K dated October 17, 2007, File No. 1-3164, as Exhibit 4.5, in Form 10-Q for the quarter ended March 31, 2008, File No. 1-3164, as Exhibit 3(b)1, and in Form 8-K dated September 5, 2017, File No. 1-3164, as Exhibit 4.1.)
(b)2
Amended and Restated By-laws of Alabama Power effective February 10, 2014, and as presently in effect. (Designated in Form 8-K dated February 10, 2014, File No 1-3164, as Exhibit 3.1.)
Georgia Power
(c)1
Charter of Georgia Power and amendments thereto through October 9, 2007. (Designated in Registration Nos. 2-63392 as Exhibit 2(a)-2, 2-78913 as Exhibits 4(a)-(2) and 4(a)-(3), 2-93039 as Exhibit 4(a)-(2), 2-96810 as Exhibit 4(a)-2, 33-141 as Exhibit 4(a)-(2), 33-1359 as Exhibit 4(a)(2), 33-5405 as Exhibit 4(b)(2), 33-14367 as Exhibits 4(b)-(2) and 4(b)-(3), 33-22504 as Exhibits 4(b)-(2), 4(b)-(3) and 4(b)-(4), in Form 10-K for the year ended December 31, 1991, File No. 1-6468, as Exhibits 4(a)(2) and 4(a)(3), in Registration No. 33-48895 as Exhibits 4(b)-(2) and 4(b)-(3), in Form 8-K dated December 10, 1992, File No. 1-6468 as Exhibit 4(b), in Form 8-K dated June 17, 1993, File No. 1-6468, as Exhibit 4(b), in Form 8-K dated October 20, 1993, File No. 1-6468, as Exhibit 4(b), in Form 10-K for the year ended December 31, 1997, File No. 1-6468, as Exhibit 3(c)2, in Form 10-K for the year ended December 31, 2000, File No. 1-6468, as Exhibit 3(c)2, in Form 8-K dated June 27, 2006, File No. 1-6468, as Exhibit 3.1, and in Form 8-K dated October 3, 2007, File No. 1-6468, as Exhibit 4.5.)
(c)2
By-laws of Georgia Power as amended effective November 9, 2016, and as presently in effect. (Designated in Form 8-K dated November 9, 2016, File No. 1-6468, as Exhibit 3.1.)
Mississippi Power
(d)1
Articles of Incorporation of Mississippi Power, articles of merger of Mississippi Power Company (a Maine corporation) into Mississippi Power and articles of amendment to the articles of incorporation of Mississippi Power through April 2, 2004. (Designated in Registration No. 2-71540 as Exhibit 4(a)-1, in Form U5S for 1987, File No. 30-222-2, as Exhibit B-10, in Registration No. 33-49320 as Exhibit 4(b)-(1), in Form 8-K dated August 5, 1992, File No. 001-11229, as Exhibits 4(b)-2 and 4(b)-3, in Form 8-K dated August 4, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 8-K dated August 18, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 10-K for the year ended December 31, 1997, File No. 001-11229, as Exhibit 3(e)2, in Form 10-K for the year ended December 31, 2000, File No. 001-11229, as Exhibit 3(e)2, and in Form 8-K dated March 3, 2004, File No. 001-11229, as Exhibit 4.6.)
(d)2
By-laws of Mississippi Power as amended effective July 23, 2019, and as presently in effect. (Designated in Form 10-Q for the quarter ended June 30, 2019, File No. 001-11229, as Exhibit 3(d).)
Southern Power
(e)1
Certificate of Incorporation of Southern Power Company dated January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.1.)
(e)2
By-laws of Southern Power Company effective January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.2.)

Southern Company Gas
(f)1
Amended and Restated Articles of Incorporation of Southern Company Gas dated July 11, 2016. (Designated in Form 8-K dated July 8, 2016, File No. 1-14174, as Exhibit 3.1.)
(f)2
Amended and Restated By-laws of Southern Company Gas effective October 23, 2018. (Designated in Form 10-Q for the quarter ended June 30, 2019, File No. 1-14174, as Exhibit 3(e).)
(4)Instruments Describing Rights of Security Holders, Including Indentures
With respect to each of Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas, such Registrant has excluded certain instruments with respect to long-term debt that does not exceed 10% of the total assets of such Registrant and its subsidiaries. Each such Registrant agrees, upon request of the SEC, to furnish copies of any or all such instruments to the SEC.
Southern Company
(a)1
(a)2
(a)3
Purchase Contract and Pledge Agreement, dated as of August 16, 2019, between Southern Company and U.S. Bank National Association, as Purchase Contract Agent, Collateral Agent, Custodial Agent, and Securities Intermediary. (Designated in Form 8-K dated August 13, 2019, File No. 1-3526, as Exhibit 4.9.)
*(a)4
Alabama Power
(b)1
Subordinated Note Indenture dated as of January 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through October 2, 2002. (Designated in Form 8-K dated January 9, 1997, File No. 1-3164, as Exhibits 4.1, and in Form 8-K dated September 26, 2002, File No. 3164, as Exhibit 4.9-B.)

(b)2
Senior Note Indenture dated as of December 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through September 17, 2019. (Designated in Form 8-K dated December 4, 1997, File No. 1-3164, as Exhibit 4.1, in Form 8-K dated December 6, 2002, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 11, 2003, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated March 12, 2003, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 8, 2008, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 26, 2009, File No. 1-3164 as Exhibit 4.2, in Form 8-K dated September 27, 2010, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated March 3, 2011, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(b), in Form 8-K dated January 10, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 27, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated December 3, 2013, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 20, 2014, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated March 5, 2015, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated April 9, 2015, File No. 1-3164, as Exhibit 4.6(b), in Form 8-K dated January 8, 2016, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated February 27, 2017, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated November 2, 2017, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated June 21, 2018, File No. 1-3164, as Exhibit 4.6, and in Form 8-K dated September 12, 2019, File No. 1-3164, as Exhibit 4.6.)
(b)3
Amended and Restated Trust Agreement of Alabama Power Capital Trust V dated as of October 1, 2002. (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.12-B.)
(b)4
Guarantee Agreement relating to Alabama Power Capital Trust V dated as of October 1, 2002. (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.16-B.)
*(b)5
Georgia Power
(c)1
(c)2
Subordinated Note Indenture, dated as of September 1, 2017, between Georgia Power and Wells Fargo Bank, National Association, as Trustee, and First Supplemental Indenture thereto dated as of September 21, 2017. (Designated in Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.3, and in Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.4.)
(c)3
Amended and Restated Loan Guarantee Agreement, dated as of March 22, 2019, between Georgia Power and the DOE. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.1.)
(c)4
Note Purchase Agreement among Georgia Power, the DOE, and the Federal Financing Bank dated as of February 20, 2014. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.2.)
(c)5
Future Advance Promissory Note dated February 20, 2014 made by Georgia Power to the FFB. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.3.)

(c)6
Amended and Restated Deed to Secure Debt, Security Agreement and Fixture Filing, dated as of March 22, 2019, by Georgia Power to PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.4.)
(c)7
Amended and Restated Owners Consent to Assignment and Direct Agreement and Amendment to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of March 22, 2019, among Georgia Power, the other Vogtle Owners, the DOE, and PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.5.)
(c)8
Note Purchase Agreement, dated as of March 22, 2019, between Georgia Power, the DOE, and the FFB. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.2.)
(c)9
Promissory Note of Georgia Power, dated as of March 22, 2019. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.3.)
*(c)10
Mississippi Power
(d)1
Senior Note Indenture dated as of May 1, 1998, between Mississippi Power and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through March 27, 2018. (Designated in Form 8-K dated May 14, 1998, File No. 001-11229, as Exhibit 4.1, in Form 8-K dated October 11, 2011, File No. 001-11229, as Exhibit 4.2(b), in Form 8-K dated March 5, 2012, File No. 001-11229, as Exhibit 4.2(b), in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(a) and in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(b).)
Southern Power
(e)1
*(e)2
Southern Company Gas
(f)1
Indenture dated February 20, 2001 between AGL Capital Corporation, AGL Resources Inc., and Wells Fargo Bank, National Association, as Successor Trustee. (Designated in Form S-3, File No. 333-69500, as Exhibit 4.2.)
(f)2
Southern Company Gas Capital Corporation's 6.00% Senior Notes due 2034, Form of 3.50% Senior Notes due 2021, 5.875% Senior Notes due 2041, Form of Series B Senior Notes due 2018, 4.40% Senior Notes due 2043, 3.875% Senior Notes due 2025, 3.250% Senior Notes due 2026, Form of 2.450% Senior Note due October 1, 2023, Form of 3.950% Senior Note due October 1, 2046, and Form of Series 2017A 4.400% Senior Note due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated August 31, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(a), in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(b), and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.1, respectively.)

(f)3
Southern Company Gas' Guarantee related to the 6.00% Senior Notes due 2034, Guarantee related to the 5.875% Senior Notes due 2041, Form of Guarantee related to the 3.50% Senior Notes due 2021, Guarantee related to the 4.40% Senior Notes due 2043, Guarantee related to the 3.875% Senior Notes due 2025, Guarantee related to the 3.250% Senior Notes due 2026, Form of Guarantee related to the 2.450% Senior Notes due October 1, 2023, Form of Guarantee related to the 3.950% Senior Notes due October 1, 2046, and Form of Guarantee related to the Series 2017A 4.400% Senior Notes due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(a), in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(b), and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.3, respectively.)
(f)4Indenture dated December 1, 1989 of Atlanta Gas Light Company and First Supplemental Indenture thereto dated March 16, 1992. (Designated in Form S-3, File No. 33-32274, as Exhibit 4(a) and in Form S-3, File No. 33-46419, as Exhibit 4(a).)
(f)5
Indenture of Commonwealth Edison Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated as of January 1, 1954, Indenture of Adoption of Northern Illinois Gas Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated February 9, 1954, and certain indentures supplemental thereto. (Designated in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.01, in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.02, in Registration No. 2-56578 as Exhibits 2.21 and 2.25, in Form 10-Q for the quarter ended June 30, 1996, File No. 1-7296, as Exhibit 4.01, in Form 10-K for the year ended December 31, 1997, File No. 1-7296, as Exhibit 4.19, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.09, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.10, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.11, in Form 10-K for the year ended December 31, 2006, File No. 1-7296, as Exhibit 4.11, in Form 10-Q for the quarter ended September 30, 2008, File No. 1-7296, as Exhibit 4.01, in Form 10-Q for the quarter ended September 30, 2012, File No. 1-7296, as Exhibit 4, in Form 10-K for the year ended December 31, 2016, File No. 1-14174, as Exhibit 4(g)6, in Form 10-K for the year ended December 31, 2017, File No. 1-14174, as Exhibit 4(g)6, and in Form 10-Q for the quarter ended September 30, 2018, File No. 1-14174, as Exhibit 4(g)1.)
*(f)6
(10)Material Contracts
Southern Company
#(a)1
Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. (Designated in Form 8-K dated May 25, 2011, File No. 1-3526, as Exhibit 10.1.)
#(a)2
Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2011, File No. 1-3526, as Exhibit 10(a)3.)
#(a)3
Deferred Compensation Plan for Outside Directors of The Southern Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-3526, as Exhibit 10(a)3 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3526, as Exhibit 10(a)2.)
#(a)4
Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018, First Amendment thereto dated as of December 7, 2018, and Second Amendment thereto dated as of January 29, 2019. (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-3536, as Exhibit 10(a)4, in Form 10-K for the year ended December 31, 2018, File No. 1-3536, as Exhibit 10(a)21, and in Form 10-K for the year ended December 31, 2018, File No. 1-3536, as Exhibit 10(a)22.)

#(a)5
The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, and Amendment No. 5 thereto effective January 1, 2019. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)1, in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)18, in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)16, in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)1, in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)23, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)24.)
#(a)6
The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, and Amendment No 5 thereto effective January 1, 2019. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)2, in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)19, in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)17, in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)2, in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)25, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)26.)
#(a)7
The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008 and Amendment No. 1 thereto effective March 1, 2018. (Designated in Form 8-K dated December 31, 2008, File No. 1-3526, as Exhibit 10.1 and in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)3.)
#(a)8
Deferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)103 and in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)16.)
#(a)9
Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009 and Second Amendment thereto effective December 29, 2018. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)104, in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)18, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)27.)
#(a)10
Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009, and Second Amendment thereto effective December 21, 2018. (Designated in Form 10-K for the year ended December 31, 2001, File No. 1-3526, as Exhibit 10(a)92, in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)20, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)28.)
#(a)11
Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)23, in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)22, and in Form 10-K for the year ended December 31, 2010, File No. 1-3526, as Exhibit 10(a)16.)

#(a)12
Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)24 and in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)24.)
#(a)13
Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)1).
#(a)14
Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. (Designated in Definitive Proxy Statement filed April 10, 2015, File No. 1-3526, as Appendix A.)
#(a)15
Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. (Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 10(a)17.)
(a)16
The Southern Company Employee Savings Plan, Amended and Restated effective January 1, 2018. (Designated in Post-Effective Amendment No. 1 to Form S-8, File No. 333-212783 as Exhibit 4.3.)
#(a)17
Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)2.)
#(a)18
Letter Agreement among Southern Company Gas, Southern Company, and Andrew W. Evans and Performance Stock Unit Award Agreement, dated September 29, 2016. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)3.)
#(a)19
Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)4.)
#(a)20
Performance Stock Units Agreement, dated May 23, 2018, between Southern Company and Stephen E. Kuczynski. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)1.)
#(a)21
Retention and Restricted Stock Unit Agreement, dated May 23, 2018, between Southern Company and Stephen E. Kuczynski. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)2.)
#(a)22
Form of Terms for 2019 Equity Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)3.)
#   *(a)23
#   *(a)24
*(a)25
*(a)26
*(a)27
Alabama Power
(b)1
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. (Designated in Form 10-Q for the quarter ended March 31, 2007, File No. 1-3164, as Exhibit 10(b)5 and in Form 10-K for the year ended December 31, 2018, File No. 1-3164, as Exhibit 10(b)2.)
#(b)2Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See Exhibit 10(a)1 herein.

#(b)3Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. See Exhibit 10(a)2 herein.
#(b)4Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018, First Amendment thereto dated as of December 7, 2018, and Second Amendment thereto dated as of January 29, 2019. See Exhibit 10(a)4 herein.
#(b)5The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, and Amendment No. 5 thereto effective January 1, 2019. See Exhibit 10(a)5 herein.
#(b)6The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, and Amendment No 5 thereto effective January 1, 2019. See Exhibit 10(a)6 herein.
#(b)7Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
#(b)8
Deferred Compensation Plan for Outside Directors of Alabama Power Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective June 1, 2015. (Designated in Form 10-Q for the quarter ended June 30, 2008, File No. 1-3164, as Exhibit 10(b)1 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3164, as Exhibit 10(b)1.)
#(b)9The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.
#(b)10Deferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
#(b)11Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009 and Second Amendment thereto effective December 29, 2018. See Exhibit 10(a)9 herein.
#(b)12Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009, and Second Amendment thereto effective December 21, 2018. See Exhibit 10(a)10 herein.
#(b)13Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
#(b)14Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
#(b)15
Deferred Compensation Agreement between Southern Company, Alabama Power, Georgia Power, Mississippi Power, and SCS and Philip C. Raymond dated September 15, 2010. (Designated in Form 10-Q for the quarter ended September 30, 2010, File No. 1-3164, as Exhibit 10(b)2.)
#(b)16Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. See Exhibit 10(a)15 herein.
#(b)17Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.

#(b)18Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)17 herein.
#(b)19Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)19 herein.
#(b)20Form of Terms for 2019 Equity Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)22 herein.
#(b)21Sixth Amendment to the Southern Company Supplemental Benefit Plan effective January 1, 2019. See Exhibit 10(a)24 herein.
#(b)22Sixth Amendment to The Southern Company Supplemental Executive Retirement Plan effective January 1, 2019. See Exhibit 10(a)25 herein.
Georgia Power
(c)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
(c)2Revised and Restated Integrated Transmission System Agreement dated as of November 12, 1990, between Georgia Power and OPC. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(g).)
(c)3Revised and Restated Integrated Transmission System Agreement between Georgia Power and Dalton dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(gg).)
(c)4Revised and Restated Integrated Transmission System Agreement between Georgia Power and MEAG Power dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(hh).)
(c)5
Settlement Agreement dated as of June 9, 2017, by and among Georgia Power, OPC, MEAG Power, Dalton, and Toshiba and Amendment No. 1 thereto dated as of December 8, 2017. (Designated in Form 8-K dated June 16, 2017, File No. 1-6468, as Exhibit 10.1 and in Form 8-K dated December 8, 2017, File No. 1-6468, as Exhibit 10.1.)
(c)6
Amended and Restated Services Agreement dated as of June 20, 2017, by and among Georgia Power, for itself and as agent for OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Westinghouse and WECTEC Global Project Services, Inc. (Georgia Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filing and filed them separately with the SEC.) (Designated in Form 10-Q for the quarter ended June 30, 2017, File No. 1-6468, as Exhibit 10(c)9.)
(c)7
Construction Completion Agreement dated as of October 23, 2017, between Georgia Power, for itself and as agent for OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Bechtel and Amendment No. 1 thereto dated as of October 12, 2018. (Georgia Power has requested confidential treatment for certain portions of these documents pursuant to applications for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filings and filed them separately with the SEC.) (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-6468, as Exhibit 10(c)8 and in Form 10-K for the year ended December 31, 2018, File No. 1-6468, as Exhibit 10(c)10.)
*(c)8

(c)9
Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement dated as of April 21, 2006, among Georgia Power, OPC, MEAG Power, and The City of Dalton, Georgia, Amendment 1 thereto dated as of April 8, 2008, Amendment 2 thereto dated as of February 20, 2014, Agreement Regarding Additional Participating Party Rights and Amendment 3 thereto dated as of November 2, 2017, and First Amendment to Agreement Regarding Additional Participating Party Rights and Amendment No. 3 to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of August 31, 2018. (Designated in Form 8-K dated April 21, 2006, File No. 33-7591, as Exhibit 10.4.4, in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(a), in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(b), in Form 10-Q for the quarter ended September 30, 2017, File No. 000-53908, as Exhibit 10.1, and in Form 8-K dated August 31, 2018, File No. 1-6468, as Exhibit 10.1.)
(c)10
Global Amendments to Vogtle Additional Units Agreements, dated as of February 18, 2019, among Georgia Power, OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton. (Designated in Form 10-K for the year ended December 31, 2018, File No. 1-6468, as Exhibit 10(c)12.)
Mississippi Power
(d)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
(d)2Transmission Facilities Agreement dated February 25, 1982, Amendment No. 1 dated May 12, 1982 and Amendment No. 2 dated December 6, 1983, between Entergy Corporation (formerly Gulf States) and Mississippi Power. (Designated in Form 10-K for the year ended December 31, 1981, File No. 001-11229, as Exhibit 10(f), in Form 10-K for the year ended December 31, 1982, File No. 001-11229, as Exhibit 10(f)(2), and in Form 10-K for the year ended December 31, 1983, File No. 001-11229, as Exhibit 10(f)(3).)
(d)3
Cooperative Agreement between the DOE and SCS dated as of December 12, 2008. (Designated in Form 10-K for the year ended December 31, 2008, File No. 001-11229, as Exhibit 10(e)22.) (Mississippi Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Mississippi Power omitted such portions from this filing and filed them separately with the SEC.)
Southern Power
(e)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
Southern Company Gas
(f)1
Final Allocation Agreement dated January 3, 2008. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-7296, as Exhibit 10.15.)
(f)2
Asset Purchase Agreement, dated as of October 15, 2017, by and between Pivotal Utility Holdings, Inc., as Seller, and South Jersey Industries, Inc., as Buyer. (Designated in Form 8-K dated October 15, 2017, File No. 1-14174, as Exhibit 10.1.)

(14)Code of Ethics
Southern Company
(a)
The Southern Company Code of Ethics. (Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 14(a).)
Alabama Power
(b)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Georgia Power
(c)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Mississippi Power
(d)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Southern Power
(e)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Southern Company Gas
(f)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
(21)Subsidiaries of Registrants
Southern Company
*(a)
Alabama Power
(b)Subsidiaries of Registrant. See Exhibit 21(a) herein.
Georgia Power
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
Mississippi Power
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
Southern Power
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
Southern Company Gas
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
(23)Consents of Experts and Counsel
Southern Company
*(a)1
Alabama Power
*(b)1
Georgia Power
*(c)1
Mississippi Power
*(d)1
Southern Power
*(e)1
Southern Company Gas
*(f)1
*(f)2
*(f)3

(24)Powers of Attorney and Resolutions
Southern Company
*(a)
Alabama Power
*(b)
Georgia Power
*(c)
Mississippi Power
*(d)
Southern Power
*(e)
Southern Company Gas
*(f)
(31)Section 302 Certifications
Southern Company
*(a)1
*(a)2
Alabama Power
*(b)1
*(b)2
Georgia Power
*(c)1
*(c)2
Mississippi Power
*(d)1
*(d)2
Southern Power
*(e)1
*(e)2
Southern Company Gas
*(f)1
*(f)2

(32)Section 906 Certifications
Southern Company
*(a)
Alabama Power
*(b)
Georgia Power
*(c)
Mississippi Power
*(d)
Southern Power
*(e)
Southern Company Gas
*(f)
(99)Additional Exhibits
Southern Company Gas
*(f)
(101)XBRL-Related Documents
*INSXBRL Instance Document – The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
*SCHXBRL Taxonomy Extension Schema Document
*CALXBRL Taxonomy Calculation Linkbase Document
*DEFXBRL Definition Linkbase Document
*LABXBRL Taxonomy Label Linkbase Document
*PREXBRL Taxonomy Presentation Linkbase Document
(104)Cover Page Interactive Data File
*Formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101.
** Schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished supplementally to the Securities and Exchange Commission upon request.
Table of Contents                          ��     Index to Financial Statements

THE SOUTHERN COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
THE SOUTHERN COMPANY
  
By:Thomas A. Fanning
 Chairman, President, and
 Chief Executive Officer
  
By:/s/Melissa K. Caen
 (Melissa K. Caen, Attorney-in-fact)
  
Date:February 21, 201719, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Thomas A. Fanning
Chairman, President, and
Chief Executive Officer
(Principal Executive Officer)
   
    
Art P. Beattie
Andrew W. Evans
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)
   
    
Ann P. Daiss
Comptroller and Chief Accounting Officer
(Principal Accounting Officer)
   
Directors:  
Janaki Akella
Juanita Powell Baranco
Jon A. Boscia
Henry A. Clark III
Anthony F. Earley, Jr.
David J. Grain
Veronica M. Hagen
Warren A. Hood, Jr.
Linda P. Hudson

Donald M. James
John D. Johns
Dale E. Klein
Ernest J. Moniz
William G. Smith, Jr.
Steven R. Specker
Larry D. Thompson
E. Jenner Wood III

  
By: /s/Melissa K. Caen
  (Melissa K. Caen, Attorney-in-fact)
Date: February 21, 201719, 2020






ALABAMA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
ALABAMA POWER COMPANY
  
By:Mark A. Crosswhite
 Chairman, President, and Chief Executive Officer
  
By:/s/Melissa K. Caen
 (Melissa K. Caen, Attorney-in-fact)
  
Date:February 21, 201719, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
   
    
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
   
    
Anita Allcorn-Walker
Vice President and Comptroller
(Principal Accounting Officer)
   
Directors:  
Whit Armstrong
David J.Angus R. Cooper, Sr.III
O. B. Grayson Hall, Jr.
Anthony A. Joseph
Patricia M. King

James K. Lowder
Robert D. Powers
Catherine J. Randall
C. Dowd Ritter
R. Mitchell Shackleford, III
Phillip M. Webb
  
By: /s/Melissa K. Caen
  (Melissa K. Caen, Attorney-in-fact)
Date: February 21, 201719, 2020






GEORGIA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
GEORGIA POWER COMPANY
  
By:W. Paul Bowers
 Chairman, President, and Chief Executive Officer
  
By:/s/Melissa K. Caen
 (Melissa K. Caen, Attorney-in-fact)
  
Date:February 21, 201719, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
W. Paul Bowers
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
   
    
W. Ron Hinson
Executive Vice President, Chief Financial Officer,
and Treasurer
(Principal Financial Officer)
David P. Poroch   
David P. Poroch
Comptroller andExecutive Vice President, Chief Financial Officer, Treasurer, and Comptroller
(Principal Financial and Accounting Officer)
   
Directors:  
RobertMark L. Brown, Jr.Burns
Anna R. CablikShantella E. Cooper
Stephen S. GreenLawrence L. Gellerstedt III
Douglas J. Hertz
Thomas M. Holder
Kessel D. Stelling, Jr.
Jimmy C. Tallent
Charles K. Tarbutton
Beverly Daniel Tatum
Clyde C. Tuggle
Richard W. Ussery
  
By: /s/Melissa K. Caen
  (Melissa K. Caen, Attorney-in-fact)
Date: February 21, 201719, 2020





GULF POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
GULF POWER COMPANY
By:S. W. Connally, Jr.
Chairman, President, and Chief Executive Officer
By:/s/Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 21, 2017
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.

S. W. Connally, Jr.
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
Xia Liu
Vice President and Chief Financial Officer
(Principal Financial Officer)
Janet J. Hodnett
Comptroller
(Principal Accounting Officer)
Directors:
Allan G. BenseJ. Mort O'Sullivan, III
Deborah H. CalderMichael T. Rehwinkel
William C. Cramer, Jr.Winston E. Scott
Julian B. MacQueen
By:/s/Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 21, 2017



MISSISSIPPI POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
MISSISSIPPI POWER COMPANY
  
By:Anthony L. Wilson
 Chairman, President, and Chief Executive Officer
  
By:/s/Melissa K. Caen
 (Melissa K. Caen, Attorney-in-fact)
  
Date:February 21, 201719, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Anthony L. Wilson
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
   
    
Moses H. Feagin
Vice President, Treasurer, and
Chief Financial Officer
(Principal Financial Officer)
   
    
Cynthia F. Shaw
Comptroller
(Principal Accounting Officer)
   
Directors:  
Carl J. Chaney
L. Royce Cumbest
Thomas M. Duff
Mark E. Keenum
L. Royce Cumbest
Christine L. Pickering
Thomas A. DewsPhillip J. Terrell
M. L.
M.L. Waters
Camille S. Young
  
By: /s/Melissa K. Caen
  (Melissa K. Caen, Attorney-in-fact)
Date: February 21, 201719, 2020



Supplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:

Mississippi Power is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2019. Accordingly, Mississippi Power will not file an annual report with the Securities and Exchange Commission.






INDEX TO FINANCIAL STATEMENT SCHEDULES
Schedules I through V not listed above are omitted as not applicable or not required. Columns omitted from schedules filed have been omitted because the information is not applicable or not required.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and Southern Company's internal control over financial reporting as of December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company (Page S-8) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Alabama Power (Page S-9) listed in the Index at Item 15. This financial statement schedule is the responsibility of Alabama Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Georgia Power (Page S-10) listed in the Index at Item 15. This financial statement schedule is the responsibility of Georgia Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Mississippi Power (Page S-11) listed in the Index at Item 15. This financial statement schedule is the responsibility of Mississippi Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Power (Page S-12) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company Gas (Page S-13) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


THE SOUTHERN COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions      
DescriptionBalance at Beginning of Period Charged to Income Charged to Other Accounts  Deductions 
Reclassified to Held for Sale(c)
 Balance at End of Period
Provision for uncollectible accounts(a)
            
2019$50
 $68
 $
  $69
 $
 $49
201844
 69
 (1)  61
 1
 50
201743
 56
 
  55
 
 44
Tax valuation allowance (net state)(b)
            
2019$100
 $13
 $
  $
 $
 $113
2018148
 (38) 
  10
 
 100
201722
 126
 
  
 
 148
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized. This valuation allowance was reduced in 2018 as a result of higher projected state taxable income. In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, as a result of lower projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.
(c)
Represents provision for uncollectible accounts at Gulf Power presented on Southern Company's balance sheet at December 31, 2018 as assets held for sale, current. See Note 15 to the financial statements under "Southern Company" and "Assets Held for Sale" in Item 8 herein for additional information.

ALABAMA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts 
Deductions(*)
 
Balance at
End of Period
Provision for uncollectible accounts         
2019$10
 $24
 $
 $12
 $22
20189
 13
 
 12
 10
201710
 10
 
 11
 9
(*)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.

GEORGIA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Provision for uncollectible accounts(a)
         
2019$2
 $13
 $
 $13
 $2
20183
 11
 
 12
 2
20173
 11
 
 11
 3
Tax valuation allowance (net state)(b)
         
2019$33
 $(5) $
 $
 $28
2018
 39
 
 6
 33
2017
 
 
 
 
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, which was reduced in 2019 as a result of higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.


MISSISSIPPI POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Provision for uncollectible accounts(a)
         
2019$1
 $2
 $
 $2
 $1
20181
 1
 
 1
 1
2017
 2
 
 1
 1
Tax valuation allowance (net state)(b)
         
2019$32
 $
 $
 $
 $32
2018124
 (92) 
 
 32
2017
 124
 
 
 124
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized, which was reduced in 2018 as a result of higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.

SOUTHERN POWER COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Tax valuation allowance (net state)         
2019$22
 $7
 $
 $
 $29
201810
 12
 
 
 22
2017
 10
 
 
 10




SOUTHERN COMPANY GAS AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts Deductions 
Balance at
End of Period
Provision for uncollectible accounts(a)
         
2019$30
 $29
 $
 $41
 $18
201828
 33
 (1) 30
 30
201727
 28
 
 27
 28
Tax valuation allowance (net state)(b)
         
2019$12
 $(8) $
 $
 $4
201811
 1
 
 
 12
201719
 
 
 8
 11
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)
In 2019, Southern Company Gas reversed a $13 million valuation allowance for a federal deferred tax asset in connection with the sale of Triton. Additionally, in 2019, a $5 million valuation allowance was established for a state net operating loss carryforward expected to expire prior to being fully utilized. See Note 10 to the financial statements and Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.

EXHIBIT INDEX
The exhibits below with an asterisk (*) preceding the exhibit number are filed herewith. The remaining exhibits have previously been filed with the SEC and are incorporated herein by reference. The exhibits marked with a pound sign (#) are management contracts or compensatory plans or arrangements required to be identified as such by Item 15 of Form 10-K.
(2)Plan of acquisition, reorganization, arrangement, liquidation or succession
Southern Company
(a)1
Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. (Designated in Form 8-K dated August 23, 2015, File No. 1-3526, as Exhibit 2.1.)
(a)2
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company, 700 Universe, LLC, and NextEra Energy and Amendment No. 1 thereto dated as of January 1, 2019. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)1 and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 2(a)3.)
(a)3
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company Gas, NUI Corporation, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)2.)
(a)4
Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)3.)
Southern Power
(e)1Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. See Exhibit 2(a)4 herein.
(e)2
Membership Interest Purchase Agreement, dated as of April 17, 2019, by and between Southern Power and The City of Austin d/b/a Austin Energy. (Designated in Form 8-K dated June 13, 2019, File No. 001-37803, as Exhibit 2.1.)
(e)3
Letter Agreement, dated as of May 24, 2019, by and between Southern Power and The City of Austin d/b/a Austin Energy. (Designated in Form 8-K dated June 13, 2019, File No. 001-37803, as Exhibit 2.2.)
Southern Company Gas
(f)1Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. See Exhibit 2(a)1 herein.
(f)2
Purchase and Sale Agreement, dated as of July 10, 2016, among Kinder Morgan SNG Operator LLC, Southern Natural Gas Company, L.L.C., and Southern Company.(Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1a.)
(f)3
Assignment, Assumption and Novation of Purchase and Sale Agreement, dated as of August 31, 2016, between Southern Company and Evergreen Enterprise Holdings LLC. (Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1b.)
(3)Articles of Incorporation and By-Laws
Southern Company
(a)1
Restated Certificate of Incorporation of Southern Company, dated February 12, 2019. (Designated in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 3(a)1.)
(a)2
Amended and Restated By-laws of Southern Company effective December 9, 2019, and as presently in effect. (Designated in Form 8-K dated December 9, 2019, File No. 1-3526, as Exhibit 3.1.)

Alabama Power
(b)1
Charter of Alabama Power and amendments thereto through September 7, 2017. (Designated in Registration Nos. 2-59634 as Exhibit 2(b), 2-60209 as Exhibit 2(c), 2-60484 as Exhibit 2(b), 2-70838 as Exhibit 4(a)-2, 2-85987 as Exhibit 4(a)-2, 33-25539 as Exhibit 4(a)-2, 33-43917 as Exhibit 4(a)-2, in Form 8-K dated February 5, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated July 8, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated October 27, 1993, File No. 1-3164, as Exhibits 4(a) and 4(b), in Form 8-K dated November 16, 1993, File No. 1-3164, as Exhibit 4(a), in Certificate of Notification, File No. 70-8191, as Exhibit A, in Form 10-K for the year ended December 31, 1997, File No. 1-3164, as Exhibit 3(b)2, in Form 8-K dated August 10, 1998, File No. 1-3164, as Exhibit 4.4, in Form 10-K for the year ended December 31, 2000, File No. 1-3164, as Exhibit 3(b)2, in Form 10-K for the year ended December 31, 2001, File No. 1-3164, as Exhibit 3(b)2, in Form 8-K dated February 5, 2003, File No. 1-3164, as Exhibit 4.4, in Form 10-Q for the quarter ended March 31, 2003, File No 1-3164, as Exhibit 3(b)1, in Form 8-K dated February 5, 2004, File No. 1-3164, as Exhibit 4.4, in Form 10-Q for the quarter ended March 31, 2006, File No. 1-3164, as Exhibit 3(b)(1), in Form 8-K dated December 5, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated September 12, 2007, File No. 1-3164, as Exhibit 4.5, in Form 8-K dated October 17, 2007, File No. 1-3164, as Exhibit 4.5, in Form 10-Q for the quarter ended March 31, 2008, File No. 1-3164, as Exhibit 3(b)1, and in Form 8-K dated September 5, 2017, File No. 1-3164, as Exhibit 4.1.)
(b)2
Amended and Restated By-laws of Alabama Power effective February 10, 2014, and as presently in effect. (Designated in Form 8-K dated February 10, 2014, File No 1-3164, as Exhibit 3.1.)
Georgia Power
(c)1
Charter of Georgia Power and amendments thereto through October 9, 2007. (Designated in Registration Nos. 2-63392 as Exhibit 2(a)-2, 2-78913 as Exhibits 4(a)-(2) and 4(a)-(3), 2-93039 as Exhibit 4(a)-(2), 2-96810 as Exhibit 4(a)-2, 33-141 as Exhibit 4(a)-(2), 33-1359 as Exhibit 4(a)(2), 33-5405 as Exhibit 4(b)(2), 33-14367 as Exhibits 4(b)-(2) and 4(b)-(3), 33-22504 as Exhibits 4(b)-(2), 4(b)-(3) and 4(b)-(4), in Form 10-K for the year ended December 31, 1991, File No. 1-6468, as Exhibits 4(a)(2) and 4(a)(3), in Registration No. 33-48895 as Exhibits 4(b)-(2) and 4(b)-(3), in Form 8-K dated December 10, 1992, File No. 1-6468 as Exhibit 4(b), in Form 8-K dated June 17, 1993, File No. 1-6468, as Exhibit 4(b), in Form 8-K dated October 20, 1993, File No. 1-6468, as Exhibit 4(b), in Form 10-K for the year ended December 31, 1997, File No. 1-6468, as Exhibit 3(c)2, in Form 10-K for the year ended December 31, 2000, File No. 1-6468, as Exhibit 3(c)2, in Form 8-K dated June 27, 2006, File No. 1-6468, as Exhibit 3.1, and in Form 8-K dated October 3, 2007, File No. 1-6468, as Exhibit 4.5.)
(c)2
By-laws of Georgia Power as amended effective November 9, 2016, and as presently in effect. (Designated in Form 8-K dated November 9, 2016, File No. 1-6468, as Exhibit 3.1.)
Mississippi Power
(d)1
Articles of Incorporation of Mississippi Power, articles of merger of Mississippi Power Company (a Maine corporation) into Mississippi Power and articles of amendment to the articles of incorporation of Mississippi Power through April 2, 2004. (Designated in Registration No. 2-71540 as Exhibit 4(a)-1, in Form U5S for 1987, File No. 30-222-2, as Exhibit B-10, in Registration No. 33-49320 as Exhibit 4(b)-(1), in Form 8-K dated August 5, 1992, File No. 001-11229, as Exhibits 4(b)-2 and 4(b)-3, in Form 8-K dated August 4, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 8-K dated August 18, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 10-K for the year ended December 31, 1997, File No. 001-11229, as Exhibit 3(e)2, in Form 10-K for the year ended December 31, 2000, File No. 001-11229, as Exhibit 3(e)2, and in Form 8-K dated March 3, 2004, File No. 001-11229, as Exhibit 4.6.)
(d)2
By-laws of Mississippi Power as amended effective July 23, 2019, and as presently in effect. (Designated in Form 10-Q for the quarter ended June 30, 2019, File No. 001-11229, as Exhibit 3(d).)
Southern Power
(e)1
Certificate of Incorporation of Southern Power Company dated January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.1.)
(e)2
By-laws of Southern Power Company effective January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.2.)

Southern Company Gas
(f)1
Amended and Restated Articles of Incorporation of Southern Company Gas dated July 11, 2016. (Designated in Form 8-K dated July 8, 2016, File No. 1-14174, as Exhibit 3.1.)
(f)2
Amended and Restated By-laws of Southern Company Gas effective October 23, 2018. (Designated in Form 10-Q for the quarter ended June 30, 2019, File No. 1-14174, as Exhibit 3(e).)
(4)Instruments Describing Rights of Security Holders, Including Indentures
With respect to each of Southern Company, Alabama Power, Georgia Power, Mississippi Power, Southern Power Company, and Southern Company Gas, such Registrant has excluded certain instruments with respect to long-term debt that does not exceed 10% of the total assets of such Registrant and its subsidiaries. Each such Registrant agrees, upon request of the SEC, to furnish copies of any or all such instruments to the SEC.
Southern Company
(a)1
(a)2
(a)3
Purchase Contract and Pledge Agreement, dated as of August 16, 2019, between Southern Company and U.S. Bank National Association, as Purchase Contract Agent, Collateral Agent, Custodial Agent, and Securities Intermediary. (Designated in Form 8-K dated August 13, 2019, File No. 1-3526, as Exhibit 4.9.)
*(a)4
Alabama Power
(b)1
Subordinated Note Indenture dated as of January 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through October 2, 2002. (Designated in Form 8-K dated January 9, 1997, File No. 1-3164, as Exhibits 4.1, and in Form 8-K dated September 26, 2002, File No. 3164, as Exhibit 4.9-B.)

(b)2
Senior Note Indenture dated as of December 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through September 17, 2019. (Designated in Form 8-K dated December 4, 1997, File No. 1-3164, as Exhibit 4.1, in Form 8-K dated December 6, 2002, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 11, 2003, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated March 12, 2003, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 8, 2008, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 26, 2009, File No. 1-3164 as Exhibit 4.2, in Form 8-K dated September 27, 2010, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated March 3, 2011, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(b), in Form 8-K dated January 10, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 27, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated December 3, 2013, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 20, 2014, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated March 5, 2015, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated April 9, 2015, File No. 1-3164, as Exhibit 4.6(b), in Form 8-K dated January 8, 2016, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated February 27, 2017, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated November 2, 2017, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated June 21, 2018, File No. 1-3164, as Exhibit 4.6, and in Form 8-K dated September 12, 2019, File No. 1-3164, as Exhibit 4.6.)
(b)3
Amended and Restated Trust Agreement of Alabama Power Capital Trust V dated as of October 1, 2002. (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.12-B.)
(b)4
Guarantee Agreement relating to Alabama Power Capital Trust V dated as of October 1, 2002. (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.16-B.)
*(b)5
Georgia Power
(c)1
(c)2
Subordinated Note Indenture, dated as of September 1, 2017, between Georgia Power and Wells Fargo Bank, National Association, as Trustee, and First Supplemental Indenture thereto dated as of September 21, 2017. (Designated in Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.3, and in Form 8-K dated September 18, 2017, File No. 1-6468, as Exhibit 4.4.)
(c)3
Amended and Restated Loan Guarantee Agreement, dated as of March 22, 2019, between Georgia Power and the DOE. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.1.)
(c)4
Note Purchase Agreement among Georgia Power, the DOE, and the Federal Financing Bank dated as of February 20, 2014. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.2.)
(c)5
Future Advance Promissory Note dated February 20, 2014 made by Georgia Power to the FFB. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.3.)

(c)6
Amended and Restated Deed to Secure Debt, Security Agreement and Fixture Filing, dated as of March 22, 2019, by Georgia Power to PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.4.)
(c)7
Amended and Restated Owners Consent to Assignment and Direct Agreement and Amendment to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of March 22, 2019, among Georgia Power, the other Vogtle Owners, the DOE, and PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.5.)
(c)8
Note Purchase Agreement, dated as of March 22, 2019, between Georgia Power, the DOE, and the FFB. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.2.)
(c)9
Promissory Note of Georgia Power, dated as of March 22, 2019. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.3.)
*(c)10
Mississippi Power
(d)1
Senior Note Indenture dated as of May 1, 1998, between Mississippi Power and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through March 27, 2018. (Designated in Form 8-K dated May 14, 1998, File No. 001-11229, as Exhibit 4.1, in Form 8-K dated October 11, 2011, File No. 001-11229, as Exhibit 4.2(b), in Form 8-K dated March 5, 2012, File No. 001-11229, as Exhibit 4.2(b), in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(a) and in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(b).)
Southern Power
(e)1
*(e)2
Southern Company Gas
(f)1
Indenture dated February 20, 2001 between AGL Capital Corporation, AGL Resources Inc., and Wells Fargo Bank, National Association, as Successor Trustee. (Designated in Form S-3, File No. 333-69500, as Exhibit 4.2.)
(f)2
Southern Company Gas Capital Corporation's 6.00% Senior Notes due 2034, Form of 3.50% Senior Notes due 2021, 5.875% Senior Notes due 2041, Form of Series B Senior Notes due 2018, 4.40% Senior Notes due 2043, 3.875% Senior Notes due 2025, 3.250% Senior Notes due 2026, Form of 2.450% Senior Note due October 1, 2023, Form of 3.950% Senior Note due October 1, 2046, and Form of Series 2017A 4.400% Senior Note due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated August 31, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(a), in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(b), and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.1, respectively.)

(f)3
Southern Company Gas' Guarantee related to the 6.00% Senior Notes due 2034, Guarantee related to the 5.875% Senior Notes due 2041, Form of Guarantee related to the 3.50% Senior Notes due 2021, Guarantee related to the 4.40% Senior Notes due 2043, Guarantee related to the 3.875% Senior Notes due 2025, Guarantee related to the 3.250% Senior Notes due 2026, Form of Guarantee related to the 2.450% Senior Notes due October 1, 2023, Form of Guarantee related to the 3.950% Senior Notes due October 1, 2046, and Form of Guarantee related to the Series 2017A 4.400% Senior Notes due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(a), in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(b), and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.3, respectively.)
(f)4Indenture dated December 1, 1989 of Atlanta Gas Light Company and First Supplemental Indenture thereto dated March 16, 1992. (Designated in Form S-3, File No. 33-32274, as Exhibit 4(a) and in Form S-3, File No. 33-46419, as Exhibit 4(a).)
(f)5
Indenture of Commonwealth Edison Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated as of January 1, 1954, Indenture of Adoption of Northern Illinois Gas Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated February 9, 1954, and certain indentures supplemental thereto. (Designated in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.01, in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.02, in Registration No. 2-56578 as Exhibits 2.21 and 2.25, in Form 10-Q for the quarter ended June 30, 1996, File No. 1-7296, as Exhibit 4.01, in Form 10-K for the year ended December 31, 1997, File No. 1-7296, as Exhibit 4.19, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.09, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.10, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.11, in Form 10-K for the year ended December 31, 2006, File No. 1-7296, as Exhibit 4.11, in Form 10-Q for the quarter ended September 30, 2008, File No. 1-7296, as Exhibit 4.01, in Form 10-Q for the quarter ended September 30, 2012, File No. 1-7296, as Exhibit 4, in Form 10-K for the year ended December 31, 2016, File No. 1-14174, as Exhibit 4(g)6, in Form 10-K for the year ended December 31, 2017, File No. 1-14174, as Exhibit 4(g)6, and in Form 10-Q for the quarter ended September 30, 2018, File No. 1-14174, as Exhibit 4(g)1.)
*(f)6
(10)Material Contracts
Southern Company
#(a)1
Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. (Designated in Form 8-K dated May 25, 2011, File No. 1-3526, as Exhibit 10.1.)
#(a)2
Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2011, File No. 1-3526, as Exhibit 10(a)3.)
#(a)3
Deferred Compensation Plan for Outside Directors of The Southern Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-3526, as Exhibit 10(a)3 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3526, as Exhibit 10(a)2.)
#(a)4
Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018, First Amendment thereto dated as of December 7, 2018, and Second Amendment thereto dated as of January 29, 2019. (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-3536, as Exhibit 10(a)4, in Form 10-K for the year ended December 31, 2018, File No. 1-3536, as Exhibit 10(a)21, and in Form 10-K for the year ended December 31, 2018, File No. 1-3536, as Exhibit 10(a)22.)

#(a)5
The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, and Amendment No. 5 thereto effective January 1, 2019. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)1, in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)18, in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)16, in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)1, in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)23, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)24.)
#(a)6
The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, and Amendment No 5 thereto effective January 1, 2019. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)2, in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)19, in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)17, in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)2, in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)25, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)26.)
#(a)7
The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008 and Amendment No. 1 thereto effective March 1, 2018. (Designated in Form 8-K dated December 31, 2008, File No. 1-3526, as Exhibit 10.1 and in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)3.)
#(a)8
Deferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)103 and in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)16.)
#(a)9
Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009 and Second Amendment thereto effective December 29, 2018. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)104, in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)18, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)27.)
#(a)10
Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009, and Second Amendment thereto effective December 21, 2018. (Designated in Form 10-K for the year ended December 31, 2001, File No. 1-3526, as Exhibit 10(a)92, in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)20, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)28.)
#(a)11
Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)23, in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)22, and in Form 10-K for the year ended December 31, 2010, File No. 1-3526, as Exhibit 10(a)16.)

#(a)12
Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)24 and in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)24.)
#(a)13
Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)1).
#(a)14
Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. (Designated in Definitive Proxy Statement filed April 10, 2015, File No. 1-3526, as Appendix A.)
#(a)15
Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. (Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 10(a)17.)
(a)16
The Southern Company Employee Savings Plan, Amended and Restated effective January 1, 2018. (Designated in Post-Effective Amendment No. 1 to Form S-8, File No. 333-212783 as Exhibit 4.3.)
#(a)17
Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)2.)
#(a)18
Letter Agreement among Southern Company Gas, Southern Company, and Andrew W. Evans and Performance Stock Unit Award Agreement, dated September 29, 2016. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)3.)
#(a)19
Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)4.)
#(a)20
Performance Stock Units Agreement, dated May 23, 2018, between Southern Company and Stephen E. Kuczynski. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)1.)
#(a)21
Retention and Restricted Stock Unit Agreement, dated May 23, 2018, between Southern Company and Stephen E. Kuczynski. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)2.)
#(a)22
Form of Terms for 2019 Equity Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)3.)
#   *(a)23
#   *(a)24
*(a)25
*(a)26
*(a)27
Alabama Power
(b)1
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. (Designated in Form 10-Q for the quarter ended March 31, 2007, File No. 1-3164, as Exhibit 10(b)5 and in Form 10-K for the year ended December 31, 2018, File No. 1-3164, as Exhibit 10(b)2.)
#(b)2Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See Exhibit 10(a)1 herein.

#(b)3Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. See Exhibit 10(a)2 herein.
#(b)4Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018, First Amendment thereto dated as of December 7, 2018, and Second Amendment thereto dated as of January 29, 2019. See Exhibit 10(a)4 herein.
#(b)5The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, and Amendment No. 5 thereto effective January 1, 2019. See Exhibit 10(a)5 herein.
#(b)6The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, and Amendment No 5 thereto effective January 1, 2019. See Exhibit 10(a)6 herein.
#(b)7Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
#(b)8
Deferred Compensation Plan for Outside Directors of Alabama Power Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective June 1, 2015. (Designated in Form 10-Q for the quarter ended June 30, 2008, File No. 1-3164, as Exhibit 10(b)1 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3164, as Exhibit 10(b)1.)
#(b)9The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.
#(b)10Deferred Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Mississippi Power, Southern Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
#(b)11Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009 and Second Amendment thereto effective December 29, 2018. See Exhibit 10(a)9 herein.
#(b)12Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, and Mississippi Power, First Amendment thereto effective January 1, 2009, and Second Amendment thereto effective December 21, 2018. See Exhibit 10(a)10 herein.
#(b)13Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
#(b)14Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
#(b)15
Deferred Compensation Agreement between Southern Company, Alabama Power, Georgia Power, Mississippi Power, and SCS and Philip C. Raymond dated September 15, 2010. (Designated in Form 10-Q for the quarter ended September 30, 2010, File No. 1-3164, as Exhibit 10(b)2.)
#(b)16Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. See Exhibit 10(a)15 herein.
#(b)17Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.

#(b)18Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)17 herein.
#(b)19Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)19 herein.
#(b)20Form of Terms for 2019 Equity Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)22 herein.
#(b)21Sixth Amendment to the Southern Company Supplemental Benefit Plan effective January 1, 2019. See Exhibit 10(a)24 herein.
#(b)22Sixth Amendment to The Southern Company Supplemental Executive Retirement Plan effective January 1, 2019. See Exhibit 10(a)25 herein.
Georgia Power
(c)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
(c)2Revised and Restated Integrated Transmission System Agreement dated as of November 12, 1990, between Georgia Power and OPC. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(g).)
(c)3Revised and Restated Integrated Transmission System Agreement between Georgia Power and Dalton dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(gg).)
(c)4Revised and Restated Integrated Transmission System Agreement between Georgia Power and MEAG Power dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(hh).)
(c)5
Settlement Agreement dated as of June 9, 2017, by and among Georgia Power, OPC, MEAG Power, Dalton, and Toshiba and Amendment No. 1 thereto dated as of December 8, 2017. (Designated in Form 8-K dated June 16, 2017, File No. 1-6468, as Exhibit 10.1 and in Form 8-K dated December 8, 2017, File No. 1-6468, as Exhibit 10.1.)
(c)6
Amended and Restated Services Agreement dated as of June 20, 2017, by and among Georgia Power, for itself and as agent for OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Westinghouse and WECTEC Global Project Services, Inc. (Georgia Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filing and filed them separately with the SEC.) (Designated in Form 10-Q for the quarter ended June 30, 2017, File No. 1-6468, as Exhibit 10(c)9.)
(c)7
Construction Completion Agreement dated as of October 23, 2017, between Georgia Power, for itself and as agent for OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Bechtel and Amendment No. 1 thereto dated as of October 12, 2018. (Georgia Power has requested confidential treatment for certain portions of these documents pursuant to applications for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filings and filed them separately with the SEC.) (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-6468, as Exhibit 10(c)8 and in Form 10-K for the year ended December 31, 2018, File No. 1-6468, as Exhibit 10(c)10.)
*(c)8

(c)9
Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement dated as of April 21, 2006, among Georgia Power, OPC, MEAG Power, and The City of Dalton, Georgia, Amendment 1 thereto dated as of April 8, 2008, Amendment 2 thereto dated as of February 20, 2014, Agreement Regarding Additional Participating Party Rights and Amendment 3 thereto dated as of November 2, 2017, and First Amendment to Agreement Regarding Additional Participating Party Rights and Amendment No. 3 to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of August 31, 2018. (Designated in Form 8-K dated April 21, 2006, File No. 33-7591, as Exhibit 10.4.4, in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(a), in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(b), in Form 10-Q for the quarter ended September 30, 2017, File No. 000-53908, as Exhibit 10.1, and in Form 8-K dated August 31, 2018, File No. 1-6468, as Exhibit 10.1.)
(c)10
Global Amendments to Vogtle Additional Units Agreements, dated as of February 18, 2019, among Georgia Power, OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton. (Designated in Form 10-K for the year ended December 31, 2018, File No. 1-6468, as Exhibit 10(c)12.)
Mississippi Power
(d)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
(d)2Transmission Facilities Agreement dated February 25, 1982, Amendment No. 1 dated May 12, 1982 and Amendment No. 2 dated December 6, 1983, between Entergy Corporation (formerly Gulf States) and Mississippi Power. (Designated in Form 10-K for the year ended December 31, 1981, File No. 001-11229, as Exhibit 10(f), in Form 10-K for the year ended December 31, 1982, File No. 001-11229, as Exhibit 10(f)(2), and in Form 10-K for the year ended December 31, 1983, File No. 001-11229, as Exhibit 10(f)(3).)
(d)3
Cooperative Agreement between the DOE and SCS dated as of December 12, 2008. (Designated in Form 10-K for the year ended December 31, 2008, File No. 001-11229, as Exhibit 10(e)22.) (Mississippi Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Mississippi Power omitted such portions from this filing and filed them separately with the SEC.)
Southern Power
(e)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
Southern Company Gas
(f)1
Final Allocation Agreement dated January 3, 2008. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-7296, as Exhibit 10.15.)
(f)2
Asset Purchase Agreement, dated as of October 15, 2017, by and between Pivotal Utility Holdings, Inc., as Seller, and South Jersey Industries, Inc., as Buyer. (Designated in Form 8-K dated October 15, 2017, File No. 1-14174, as Exhibit 10.1.)

(14)Code of Ethics
Southern Company
(a)
The Southern Company Code of Ethics. (Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 14(a).)
Alabama Power
(b)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Georgia Power
(c)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Mississippi Power
(d)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Southern Power
(e)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Southern Company Gas
(f)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
(21)Subsidiaries of Registrants
Southern Company
*(a)
Alabama Power
(b)Subsidiaries of Registrant. See Exhibit 21(a) herein.
Georgia Power
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
Mississippi Power
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
Southern Power
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
Southern Company Gas
Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
(23)Consents of Experts and Counsel
Southern Company
*(a)1
Alabama Power
*(b)1
Georgia Power
*(c)1
Mississippi Power
*(d)1
Southern Power
*(e)1
Southern Company Gas
*(f)1
*(f)2
*(f)3

(24)Powers of Attorney and Resolutions
Southern Company
*(a)
Alabama Power
*(b)
Georgia Power
*(c)
Mississippi Power
*(d)
Southern Power
*(e)
Southern Company Gas
*(f)
(31)Section 302 Certifications
Southern Company
*(a)1
*(a)2
Alabama Power
*(b)1
*(b)2
Georgia Power
*(c)1
*(c)2
Mississippi Power
*(d)1
*(d)2
Southern Power
*(e)1
*(e)2
Southern Company Gas
*(f)1
*(f)2

(32)Section 906 Certifications
Southern Company
*(a)
Alabama Power
*(b)
Georgia Power
*(c)
Mississippi Power
*(d)
Southern Power
*(e)
Southern Company Gas
*(f)
(99)Additional Exhibits
Southern Company Gas
*(f)
(101)XBRL-Related Documents
*INSXBRL Instance Document – The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
*SCHXBRL Taxonomy Extension Schema Document
*CALXBRL Taxonomy Calculation Linkbase Document
*DEFXBRL Definition Linkbase Document
*LABXBRL Taxonomy Label Linkbase Document
*PREXBRL Taxonomy Presentation Linkbase Document
(104)Cover Page Interactive Data File
*Formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101.
** Schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished supplementally to the Securities and Exchange Commission upon request.
Table of Contents                          ��     Index to Financial Statements

THE SOUTHERN COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
THE SOUTHERN COMPANY
By:Thomas A. Fanning
Chairman, President, and
Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Thomas A. Fanning
Chairman, President, and
Chief Executive Officer
(Principal Executive Officer)
Andrew W. Evans
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)
Ann P. Daiss
Comptroller and Chief Accounting Officer
(Principal Accounting Officer)
Directors:
Janaki Akella
Juanita Powell Baranco
Jon A. Boscia
Henry A. Clark III
Anthony F. Earley, Jr.
David J. Grain
Donald M. James
John D. Johns
Dale E. Klein
Ernest J. Moniz
William G. Smith, Jr.
Steven R. Specker
Larry D. Thompson
E. Jenner Wood III
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020




ALABAMA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
SOUTHERNALABAMA POWER COMPANY
  
By:JosephMark A. MillerCrosswhite
 Chairman, President, and Chief Executive Officer
  
By:/s/Melissa K. Caen
 (Melissa K. Caen, Attorney-in-fact)
  
Date:February 21, 201719, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
JosephMark A. Miller
Crosswhite
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
   
    
WilliamPhilip C. Grantham
Raymond
SeniorExecutive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
   
    
Anita Allcorn-Walker
Elliott L. Spencer
ComptrollerVice President and Corporate SecretaryComptroller
(Principal Accounting Officer)
   
Directors:  
Art P. Beattie
Angus R. Cooper, III
O. B. Grayson Hall, Jr.
Anthony A. Joseph
James K. Lowder
Robert D. Powers
Mark S. Lantrip
Thomas A. FanningChristopher
Catherine J. Randall
C. Womack
Kimberly S. Greene
James Y. Kerr IIDowd Ritter
R. Mitchell Shackleford, III
Phillip M. Webb
  
By: /s/Melissa K. Caen
  (Melissa K. Caen, Attorney-in-fact)
Date: February 21, 201719, 2020






SOUTHERNGEORGIA POWER COMPANY GAS
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
SOUTHERNGEORGIA POWER COMPANY GAS
  
By:Andrew W. EvansPaul Bowers
 Chairman, President, and Chief Executive Officer
  
By:/s/Melissa K. Caen
 (Melissa K. Caen, Attorney-in-fact)
  
Date:February 21, 201719, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
 
Andrew W. Evans
Paul Bowers
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
   
    
Elizabeth W. Reese
Executive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
David P. Poroch   
Grace A. Kolvereid
SeniorExecutive Vice President, AccountingChief Financial Officer, Treasurer, and Comptroller
(Principal Financial and Accounting Officer)
   
Directors:  
Sandra N. Bane
Mark L. Burns
Shantella E. Cooper
Lawrence L. Gellerstedt III
Douglas J. Hertz
Thomas M. Holder
Kimberly S. Greene
Thomas
Kessel D. Bell,Stelling, Jr.
John E. Rau
Charles R. Crisp
James A. Rubright
Brenda J. GainesK. Tarbutton
Beverly Daniel Tatum
Clyde C. Tuggle
  
By: /s/Melissa K. Caen
  (Melissa K. Caen, Attorney-in-fact)
Date: February 21, 201719, 2020






MISSISSIPPI POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
MISSISSIPPI POWER COMPANY
By:Anthony L. Wilson
Chairman, President, and Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Anthony L. Wilson
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
Moses H. Feagin
Vice President, Treasurer, and
Chief Financial Officer
(Principal Financial Officer)
Cynthia F. Shaw
Comptroller
(Principal Accounting Officer)
Directors:
Carl J. Chaney
L. Royce Cumbest
Thomas M. Duff
Mark E. Keenum
Christine L. Pickering
M.L. Waters
Camille S. Young
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020


Supplemental Information to be Furnished Withwith Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:


Southern Company GasMississippi Power is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2016.2019. Accordingly, Southern Company GasMississippi Power will not file an annual report with the Securities and Exchange Commission.








REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors and Stockholders of
Southern Company
We have audited the consolidated financial statements of Southern Company and Subsidiaries (the Company) as of
December 31, 2016 and 2015, and for each of the three years in the period ended December 31, 2016, and the Company's internal control over financial reporting as of December 31, 2016, and have issued our report (which expresses an unqualified opinion and includes an explanatory paragraph regarding uncertainty relating to the rate recovery process with the Mississippi Public Service Commission regarding recovery of the cost of the Kemper Integrated Coal Gasification Combined Cycle) thereon dated February 21, 2017; such report is included elsewhere in this Form 10-K. Our audits also included the consolidated financial statement schedule of the Company (page S-2) listed in Item 15. This consolidated financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such consolidated financial statement schedule, when considered in relation to the basic consolidated financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Alabama Power Company
We have audited the financial statements of Alabama Power Company (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and for each of the three years in the period ended December 31, 2016, and have issued our report thereon dated February 21, 2017; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of the Company (Page S-3) listed in Item 15. This financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Georgia Power Company
We have audited the financial statements of Georgia Power Company (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and for each of the three years in the period ended December 31, 2016, and have issued our report thereon dated February 21, 2017; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of the Company (Page S-4) listed in Item 15. This financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Gulf Power Company
We have audited the financial statements of Gulf Power Company (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and for each of the three years in the period ended December 31, 2016, and have issued our report thereon dated February 21, 2017; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of the Company (Page S-5) listed in Item 15. This financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Mississippi Power Company
We have audited the financial statements of Mississippi Power Company (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 and 2015, and for each of the three years in the period ended December 31, 2016, and have issued our report (which expresses an unqualified opinion and includes an explanatory paragraph regarding uncertainty relating to the rate recovery process with the Mississippi Public Service Commission regarding recovery of the cost of the Kemper Integrated Coal Gasification Combined Cycle) thereon dated February 21, 2017; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of the Company (Page S-6) listed in Item 15. This financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Board of Directors of
Southern Company Gas
We have audited the consolidated financial statements of Southern Company Gas and Subsidiary Companies (formerly known as AGL Resources Inc.) (the Company) (a wholly owned subsidiary of The Southern Company) as of December 31, 2016 (Successor), and for the six-month periods ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor), and have issued our report thereon dated February 21, 2017; such report is included elsewhere in this Form 10-K. As indicated in that report, we did not audit the financial statements of Southern Natural Gas Company, L.L.C. (SNG), the Company's investment in which is accounted for by the use of the equity method. The Company's consolidated financial statements include its equity investment in SNG of $1,394 million as of December 31, 2016, and its earnings from its equity method investment in SNG of $56 million for the six-month period ended December 31, 2016. Those statements were audited by other auditors, who have furnished their report to us (which expresses an unqualified opinion on SNG's financial statements and contains an emphasis of matter paragraph concerning the extent of its operations and relationships with affiliated entities), and our opinion, insofar as it relates to amounts included for SNG, is based solely on the report of the other auditors. Our audit also included the financial statement schedule of the Company for the six-month periods ended June 30, 2016 (Predecessor) and December 31, 2016 (Successor) (Page S-7) listed in Item 15. This financial statement schedule is the responsibility of the Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 21, 2017


INDEX TO FINANCIAL STATEMENT SCHEDULES
Schedules I through V not listed above are omitted as not applicable or not required. A Schedule II for Southern Power Company and Subsidiary Companies is not being provided because there were no reportable items for the three-year period ended December 31, 2016. Columns omitted from schedules filed have been omitted because the information is not applicable or not required.



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of The Southern Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of The Southern Company and subsidiary companies (Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and Southern Company's internal control over financial reporting as of December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company (Page S-8) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Alabama Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Alabama Power Company (Alabama Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Alabama Power (Page S-9) listed in the Index at Item 15. This financial statement schedule is the responsibility of Alabama Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Birmingham, Alabama
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Georgia Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Georgia Power Company (Georgia Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Georgia Power (Page S-10) listed in the Index at Item 15. This financial statement schedule is the responsibility of Georgia Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholders and the Board of Directors of Mississippi Power Company
Opinion on the Financial Statement Schedule
We have audited the financial statements of Mississippi Power Company (Mississippi Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Mississippi Power (Page S-11) listed in the Index at Item 15. This financial statement schedule is the responsibility of Mississippi Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Power Company and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Power Company and subsidiary companies (Southern Power) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Power (Page S-12) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Power's management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the stockholder and the Board of Directors of Southern Company Gas and Subsidiary Companies
Opinion on the Financial Statement Schedule
We have audited the consolidated financial statements of Southern Company Gas and subsidiary companies (Southern Company Gas) (a wholly-owned subsidiary of The Southern Company) as of December 31, 2019 and 2018, and for each of the three years in the period ended December 31, 2019, and have issued our report thereon dated February 19, 2020; such report is included elsewhere in this Form 10-K. Our audits also included the financial statement schedule of Southern Company Gas (Page S-13) listed in the Index at Item 15. This financial statement schedule is the responsibility of Southern Company Gas' management. Our responsibility is to express an opinion based on our audits. In our opinion, such financial statement schedule, when considered in relation to the financial statements taken as a whole, presents fairly, in all material respects, the information set forth therein.
/s/ Deloitte & Touche LLP
Atlanta, Georgia
February 19, 2020


THE SOUTHERN COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 20162019, 20152018, AND 20142017
(Stated in ThousandsMillions of Dollars)
   Additions    
DescriptionBalance at Beginning of Period Charged to Income Charged to Other Accounts Acquisitions Deductions (Note) Balance at End of Period
Provision for uncollectible accounts           
2016$13,341
 $39,959
 $(1,257) $40,629
 $49,243
 $43,429
201518,253
 31,074
 
 
 35,986
 13,341
201417,855
 43,537
 
 
 43,139
 18,253
   Additions      
DescriptionBalance at Beginning of Period Charged to Income Charged to Other Accounts  Deductions 
Reclassified to Held for Sale(c)
 Balance at End of Period
Provision for uncollectible accounts(a)
            
2019$50
 $68
 $
  $69
 $
 $49
201844
 69
 (1)  61
 1
 50
201743
 56
 
  55
 
 44
Tax valuation allowance (net state)(b)
            
2019$100
 $13
 $
  $
 $
 $113
2018148
 (38) 
  10
 
 100
201722
 126
 
  
 
 148
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net operating loss carryforward expected to expire prior to being fully utilized. This valuation allowance was reduced in 2018 as a result of higher projected state taxable income. In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, as a result of lower projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.
(c)
Represents provision for uncollectible accounts at Gulf Power presented on Southern Company's balance sheet at December 31, 2018 as assets held for sale, current. See Note 15 to the financial statements under "Southern Company" and "Assets Held for Sale" in Item 8 herein for additional information.
(Note)    Represents write-off of accounts considered to be uncollectible, less recoveries of amounts previously written off.



ALABAMA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 20162019, 20152018, AND 20142017
(Stated in ThousandsMillions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts 
Deductions
(Note)
 
Balance at
End of Period
Provision for uncollectible accounts         
2016$9,597
 $11,310
 $
 $10,420
 $10,487
20159,143
 13,500
 
 13,046
 9,597
20148,350
 14,309
 
 13,516
 9,143
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts 
Deductions(*)
 
Balance at
End of Period
Provision for uncollectible accounts         
2019$10
 $24
 $
 $12
 $22
20189
 13
 
 12
 10
201710
 10
 
 11
 9
(*)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(Note)    Represents write-off of accounts considered to be uncollectible, less recoveries of amounts previously written off.


GEORGIA POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 20162019, 20152018, AND 20142017
(Stated in ThousandsMillions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 
Deductions
(Note)
 Balance at End of Period
Provision for uncollectible accounts         
2016$2,147
 $14,476
 $
 $13,787
 $2,836
20156,076
 16,862
 
 20,791
 2,147
20145,074
 24,141
 
 23,139
 6,076
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Provision for uncollectible accounts(a)
         
2019$2
 $13
 $
 $13
 $2
20183
 11
 
 12
 2
20173
 11
 
 11
 3
Tax valuation allowance (net state)(b)
         
2019$33
 $(5) $
 $
 $28
2018
 39
 
 6
 33
2017
 
 
 
 
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)In 2018, Georgia Power established a valuation allowance for certain Georgia state tax credits expected to expire prior to being fully utilized, which was reduced in 2019 as a result of higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.

(Note)    Represents write-off of accounts considered to be uncollectible, less recoveries of amounts previously written off.


GULF POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2016, 2015, AND 2014
(Stated in Thousands of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 
Deductions
(Note)
 Balance at End of Period
Provision for uncollectible accounts         
2016$775
 $2,946
 $
 $2,989
 $732
20152,087
 2,041
 
 3,353
 775
20141,131
 4,304
 
 3,348
 2,087
(Note)    Represents write-off of accounts considered to be uncollectible, less recoveries of amounts previously written off.



MISSISSIPPI POWER COMPANY
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 20162019, 20152018, AND 20142017
(Stated in ThousandsMillions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 
Deductions
(Note)
 Balance at End of Period
Provision for uncollectible accounts         
2016$287
 $1,295
 $
 $1,088
 $494
2015(*)
825
 (1,994) 
 (1,456) 287
20143,018
 562
 
 2,755
 825
(Note)    Represents write-off of accounts considered to be uncollectible, less recoveries of amounts previously written off.

   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Provision for uncollectible accounts(a)
         
2019$1
 $2
 $
 $2
 $1
20181
 1
 
 1
 1
2017
 2
 
 1
 1
Tax valuation allowance (net state)(b)
         
2019$32
 $
 $
 $
 $32
2018124
 (92) 
 
 32
2017
 124
 
 
 124
(*)(a)The refund ordered by the Mississippi PSC pursuantDeductions represent write-offs of accounts considered to the 2015 Mississippi Supreme Court decision relative to Mirror CWIP involved refunding all billed amounts to all historical customers and included an interest component. The refundbe uncollectible, less recoveries of approximately $371 million in 2015 was of sufficient magnitude to resolve most past due amounts beyond 30 days aged receivables, accounting for the negative provision of $(2.0) million where risk of collectibility was offset by applying the refund to past due amounts. It was also of sufficient size to offset amounts previously written off in the 2012-2015 time frame, accountingoff.
(b)In 2017, Mississippi Power established a valuation allowance for the State of Mississippi net recoveriesoperating loss carryforward expected to expire prior to being fully utilized, which was reduced in 2018 as a result of $1.5 million.higher projected state taxable income. See Note 10 to the financial statements in Item 8 herein for additional information.

For more information regarding the 2015 decision of the Mississippi Supreme Court related to the Mirror CWIP refund in fourth quarter 2015, see Note 3 to the financial statement of Mississippi Power under "Integrated Coal Gasification Combined Cycle – 2013 MPSC Rate Order" in Item 8 herein.


SOUTHERN POWER COMPANY AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE YEARS ENDED DECEMBER 31, 2019, 2018, AND 2017
(Stated in Millions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 
Charged to Other
Accounts
 Deductions Balance at End of Period
Tax valuation allowance (net state)         
2019$22
 $7
 $
 $
 $29
201810
 12
 
 
 22
2017
 10
 
 
 10




SOUTHERN COMPANY GAS AND SUBSIDIARY COMPANIES
SCHEDULE II — VALUATION AND QUALIFYING ACCOUNTS
FOR THE SUCCESSOR PERIOD OF JULY 1, 2016 THROUGH DECEMBER 31, 2016
AND THE PREDECESSOR PERIODS OF JANUARY 1, 2016 THROUGH JUNE 30, 2016
AND THE YEARS ENDED DECEMBER 31, 20152019, 2018, AND 20142017
(Stated in ThousandsMillions of Dollars)
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts 
Deductions
(Note)
 
Balance at
End of Period
Successor – December 31, 2016         
Provision for uncollectible accounts$37,663
 $9,500
 $(1,257) $18,590
 $27,316
Income tax valuation19,182
 
 
 
 19,182
Predecessor – June 30, 2016         
Provision for uncollectible accounts$29,142
 $15,976
 $1,608
 $9,063
 $37,663
Income tax valuation19,182
 
 
 
 19,182
Predecessor – 2015         
Provision for uncollectible accounts$35,069
 $27,050
 $3,017
 $35,994
 $29,142
Income tax valuation19,637
 
 
 455
 19,182
Predecessor – 2014         
Provision for uncollectible accounts$29,261
 $54,790
 $1,414
 $50,396
 $35,069
Income tax valuation22,329
 
 
 2,692
 19,637
   Additions    
Description
Balance at Beginning
of Period
 
Charged to
Income
 Charged to Other Accounts Deductions 
Balance at
End of Period
Provision for uncollectible accounts(a)
         
2019$30
 $29
 $
 $41
 $18
201828
 33
 (1) 30
 30
201727
 28
 
 27
 28
Tax valuation allowance (net state)(b)
         
2019$12
 $(8) $
 $
 $4
201811
 1
 
 
 12
201719
 
 
 8
 11
(a)Deductions represent write-offs of accounts considered to be uncollectible, less recoveries of amounts previously written off.
(b)
In 2019, Southern Company Gas reversed a $13 million valuation allowance for a federal deferred tax asset in connection with the sale of Triton. Additionally, in 2019, a $5 million valuation allowance was established for a state net operating loss carryforward expected to expire prior to being fully utilized. See Note 10 to the financial statements and Note 15 to the financial statements under "Southern Company Gas" in Item 8 herein for additional information.
(Note)    Represents write-off of accounts considered to be uncollectible, less recoveries of amounts previously written off.



EXHIBIT INDEX
The exhibits below with an asterisk (*) preceding the exhibit number are filed herewith. The remaining exhibits have previously been filed with the SEC and are incorporated herein by reference. The exhibits marked with a pound sign (#) are management contracts or compensatory plans or arrangements required to be identified as such by Item 15 of Form 10-K.
(2) Plan of acquisition, reorganization, arrangement, liquidation or succession
  Southern Company
   (a) 1  
Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. (Designated(Designated in Form 8-K dated August 23, 2015, File No. 1-3526, as Exhibit 2.1.)
(a)2
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company, 700 Universe, LLC, and NextEra Energy and Amendment No. 1 thereto dated as of January 1, 2019. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)1 and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 2(a)3.)
(a)3
Stock Purchase Agreement, dated as of May 20, 2018, by and among Southern Company Gas, NUI Corporation, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)2.)
(a)4
Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. (Designated in Form 8-K dated May 23, 2018, File No. 1-3526, as Exhibit 2(a)3.)
Southern Power
(e)1Equity Interest Purchase Agreement, dated as of May 20, 2018, by and among Southern Power Company, 700 Universe, LLC, and NextEra Energy. See Exhibit 2(a)4 herein.
(e)2
Membership Interest Purchase Agreement, dated as of April 17, 2019, by and between Southern Power and The City of Austin d/b/a Austin Energy. (Designated in Form 8-K dated June 13, 2019, File No. 001-37803, as Exhibit 2.1.)
(e)3
Letter Agreement, dated as of May 24, 2019, by and between Southern Power and The City of Austin d/b/a Austin Energy. (Designated in Form 8-K dated June 13, 2019, File No. 001-37803, as Exhibit 2.2.)
  Southern Company Gas
   (g)(f) 1  Agreement and Plan of Merger by and among Southern Company, AMS Corp., and Southern Company Gas, dated August 23, 2015. See Exhibit 2(a)1 herein.
   (g)(f) 2  
Purchase and Sale Agreement, dated as of July 10, 2016, among Kinder Morgan SNG Operator LLC, Southern Natural Gas Company, L.L.C., and Southern Company.(Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1a.)
   (g)(f) 3  
Assignment, Assumption and Novation of Purchase and Sale Agreement, dated as of August 31, 2016, between Southern Company and Evergreen Enterprise Holdings LLC.(Designated in Form 8-K dated August 31, 2016, File No. 1-14174, as Exhibit 2.1b.)
          
(3) Articles of Incorporation and By-Laws
  Southern Company
   (a) 1  Composite
Restated Certificate of Incorporation of Southern Company, reflecting all amendments thereto through May 26, 2016. (Designated in Registration No. 33-3546 as Exhibit 4(a), in Certificate of Notification, File No. 70-7341, as Exhibit A, in Certificate of Notification, File No. 70-8181, as Exhibit A,dated February 12, 2019. (Designated in Form 8-K dated May 26, 2010,10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 3.1, and in Form 8-K dated May 25, 2016, File No. 1-3526, as Exhibit 3.1.3(a)1.)
   (a) 2  
Amended and Restated By-laws of Southern Company as amended effective May 25, 2016,December 9, 2019, and as presently in effect. (Designated(Designated in Form 8-K dated May 25, 2016,December 9, 2019, File No. 1-3526, as Exhibit 3.2.3.1.)

  Alabama Power
   (b) 1  
Charter of Alabama Power and amendments thereto through April 25, 2008.September 7, 2017. (Designated in Registration Nos. 2-59634 as Exhibit 2(b), 2-60209 as Exhibit 2(c), 2-60484 as Exhibit 2(b), 2-70838 as Exhibit 4(a)-2, 2-85987 as Exhibit 4(a)-2, 33-25539 as Exhibit 4(a)-2, 33-43917 as Exhibit 4(a)-2, in Form 8-K dated February 5, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated July 8, 1992, File No. 1-3164, as Exhibit 4(b)-3, in Form 8-K dated October 27, 1993, File No. 1-3164, as Exhibits 4(a) and 4(b), in Form 8-K dated November 16, 1993, File No. 1-3164, as Exhibit 4(a), in Certificate of Notification, File No. 70-8191, as Exhibit A, in Form 10-K for the year ended December 31, 1997, File No. 1-3164, as Exhibit 3(b)2, in Form 8-K dated August 10, 1998, File No. 1-3164, as Exhibit 4.4, in Form 10-K for the year ended December 31, 2000, File No. 1-3164, as Exhibit 3(b)2, in Form 10-K for the year ended December 31, 2001, File No. 1-3164, as Exhibit 3(b)2, in Form 8-K dated February 5, 2003, File No. 1-3164, as Exhibit 4.4, in Form 10-Q for the quarter ended March 31, 2003, File No 1-3164, as Exhibit 3(b)1, in Form 8-K dated February 5, 2004, File No. 1-3164, as Exhibit 4.4, in Form 10-Q for the quarter ended March 31, 2006, File No. 1-3164, as Exhibit 3(b)(1), in Form 8-K dated December 5, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated September 12, 2007, File No. 1-3164, as Exhibit 4.5, in Form 8-K dated October 17, 2007, File No. 1-3164, as Exhibit 4.5 and, in Form 10-Q for the quarter ended March 31, 2008, File No. 1-3164, as Exhibit 3(b)1.1, and in Form 8-K dated September 5, 2017, File No. 1-3164, as Exhibit 4.1.)
   (b) 2  
Amended and Restated By-laws of Alabama Power effective February 10, 2014, and as presently in effect. (Designated(Designated in Form 8-K dated February 10, 2014, File No 1-3164, as Exhibit 3.1.)

  Georgia Power
   (c) 1  
Charter of Georgia Power and amendments thereto through October 9, 2007. (Designated in Registration Nos. 2-63392 as Exhibit 2(a)-2, 2-78913 as Exhibits 4(a)-(2) and 4(a)-(3), 2-93039 as Exhibit 4(a)-(2), 2-96810 as Exhibit 4(a)-2, 33-141 as Exhibit 4(a)-(2), 33-1359 as Exhibit 4(a)(2), 33-5405 as Exhibit 4(b)(2), 33-14367 as Exhibits 4(b)-(2) and 4(b)-(3), 33-22504 as Exhibits 4(b)-(2), 4(b)-(3) and 4(b)-(4), in Form 10-K for the year ended December 31, 1991, File No. 1-6468, as Exhibits 4(a)(2) and 4(a)(3), in Registration No. 33-48895 as Exhibits 4(b)-(2) and 4(b)-(3), in Form 8-K dated December 10, 1992, File No. 1-6468 as Exhibit 4(b), in Form 8-K dated June 17, 1993, File No. 1-6468, as Exhibit 4(b), in Form 8-K dated October 20, 1993, File No. 1-6468, as Exhibit 4(b), in Form 10-K for the year ended December 31, 1997, File No. 1-6468, as Exhibit 3(c)2, in Form 10-K for the year ended December 31, 2000, File No. 1-6468, as Exhibit 3(c)2, in Form 8-K dated June 27, 2006, File No. 1-6468, as Exhibit 3.1, and in Form 8-K dated October 3, 2007, File No. 1-6468, as Exhibit 4.5.4.5.)
   (c) 2  
By-laws of Georgia Power as amended effective November 9, 2016, and as presently in effect. (Designated in Form 8-K dated November 9, 2016, File No. 1-6468, as Exhibit 3.1.)
  GulfMississippi Power
   (d) 1  Amended and Restated Articles of Incorporation of Gulf Power and amendments thereto through June 17, 2013. (Designated in Form 8-K dated October 27, 2005, File No. 001-31737, as Exhibit 3.1, in Form 8-K dated November 9, 2005, File No. 001-31737, as Exhibit 4.7, in Form 8-K dated October 16, 2007, File No. 001-31737, as Exhibit 4.5, and in Form 8-K dated June 10, 2013, File No. 001-31737, as Exhibit 4.7.)
(d)2By-laws of Gulf Power as amended effective November 2, 2005, and as presently in effect. (Designated in Form 8-K dated October 27, 2005, File No. 001-31737, as Exhibit 3.2.)
Mississippi Power
(e)1
Articles of Incorporation of Mississippi Power, articles of merger of Mississippi Power Company (a Maine corporation) into Mississippi Power and articles of amendment to the articles of incorporation of Mississippi Power through April 2, 2004. (Designated in Registration No. 2-71540 as Exhibit 4(a)-1, in Form U5S for 1987, File No. 30-222-2, as Exhibit B-10, in Registration No. 33-49320 as Exhibit 4(b)-(1), in Form 8-K dated August 5, 1992, File No. 001-11229, as Exhibits 4(b)-2 and 4(b)-3, in Form 8-K dated August 4, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 8-K dated August 18, 1993, File No. 001-11229, as Exhibit 4(b)-3, in Form 10-K for the year ended December 31, 1997, File No. 001-11229, as Exhibit 3(e)2, in Form 10-K for the year ended December 31, 2000, File No. 001-11229, as Exhibit 3(e)2, and in Form 8-K dated March 3, 2004, File No. 001-11229, as Exhibit 4.6.4.6.)
(d)2
By-laws of Mississippi Power as amended effective July 23, 2019, and as presently in effect. (Designated in Form 10-Q for the quarter ended June 30, 2019, File No. 001-11229, as Exhibit 3(d).)
Southern Power
(e)1
Certificate of Incorporation of Southern Power Company dated January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.1.)
   (e) 2  By-laws of Mississippi Power as amended effective October 25, 2016, and as presently in effect. (Designated in Form 8-K dated October 25, 2016, File No. 001-11229, as Exhibit 3.1)
Southern Power
(f)1Certificate of Incorporation of Southern Power Company dated January 8, 2001. (Designated in Registration No. 333-98553 as Exhibit 3.1.)
(f)2
By-laws of Southern Power Company effective January 8, 2001. (Designated(Designated in Registration No. 333-98553 as Exhibit 3.2.)

  Southern Company Gas
   (f) 1  
Amended and Restated Articles of Incorporation of Southern Company Gas dated July 11, 2016. (Designated(Designated in Form 8-K dated July 8, 2016, File No. 1-14174, as Exhibit 3.1.)
   (f) 2  
Amended and Restated By-laws of Southern Company Gas effective July 11, 2016. (DesignatedOctober 23, 2018. (Designated in Form 8-K dated July 8, 2016,10-Q for the quarter ended June 30, 2019, File No. 1-14174, as Exhibit 3.2.3(e).)
          
(4) Instruments Describing Rights of Security Holders, Including Indentures
  With respect to each of Southern Company, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and Southern Company Gas, such registrantRegistrant has not included any instrumentexcluded certain instruments with respect to long-term debt that does not exceed 10% of the total assets of such registrantRegistrant and its subsidiaries. Each such registrantRegistrant agrees, upon request of the SEC, to furnish copies of any or all such instruments to the SEC.

  Southern Company
   (a) 1  
Senior Note Indenture dated as of January 1, 2007, between Southern Company and Wells Fargo Bank, National Association, as Trustee, and certain indentures supplemental thereto through May 24, 2016.August 17, 2018. (Designated in Form 8-K dated January 11, 2007, File No. 1-3526, as ExhibitsExhibit 4.1 and 4.2,, in Form 8-K dated March 20, 2007, File No. 1-3526, as Exhibit 4.2, in Form 8-K dated August 13, 2008, File No. 1-3526, as Exhibit 4.2, in Form 8-K dated May 11, 2009, File No. 1-3526, as Exhibit 4.2, in Form 8-K dated October 19, 2009, File No. 1-3526, as Exhibit 4.2, in Form 8-K dated September 13, 2010, File No. 1-3526, as Exhibit 4.2, in Form 8-K dated August 16, 2011, File No. 1-3526, as Exhibit 4.2, in Form 8-K dated August 21, 2013, File No. 1-3526, as Exhibit 4.2 in Form 8-K dated August 19, 2014, File No. 1-3526, as Exhibits 4.2(a) and 4.2(b), in Form 8-K dated June 9, 2015, File No. 1-3526, as Exhibit 4.2 and, in Form 8-K dated May 19, 2016, File No. 1-3526, as ExhibitsExhibit 4.2(a), 4.2(b)in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(c), 4.2(c)in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(d), 4.2(d)in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(e), 4.2(e)in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(f), 4.2(f) and in Form 8-K dated May 19, 2016, File No. 1-3526, as Exhibit 4.2(g).)
   (a) 2  
(a)3
Purchase Contract and Pledge Agreement, dated as of August 16, 2019, between Southern Company and U.S. Bank National Association, as Purchase Contract Agent, Collateral Agent, Custodial Agent, and Securities Intermediary. (Designated in Form 8-K dated August 13, 2019, File No. 1-3526, as Exhibit 4.9.)
*(a)4
  Alabama Power
   (b) 1  
Subordinated Note Indenture dated as of January 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through October 2, 2002. (Designated in Form 8-K dated January 9, 1997, File No. 1-3164, as Exhibits 4.1, and 4.2, in Form 8-K dated February 18, 1999, File No. 1-3164, as Exhibit 4.2, and in Form 8-K dated September 26, 2002, File No. 3164, as Exhibits 4.9-A and 4.9-B.Exhibit 4.9-B.)


   (b) 2  
Senior Note Indenture dated as of December 1, 1997, between Alabama Power and Regions Bank, as Successor Trustee, and certain indentures supplemental thereto through January 13, 2016.September 17, 2019. (Designated in Form 8-K dated December 4, 1997, File No. 1-3164, as ExhibitsExhibit 4.1 and 4.2, in Form 8-K dated February 20, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated April 17, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 11, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated September 8, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated September 16, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated October 7, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated October 28, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 12, 1998, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 19, 1999, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 13, 1999, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated September 21, 1999, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 11, 2000, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 22, 2001, File No. 1-3164, as Exhibits 4.2(a) and 4.2(b), in Form 8-K dated June 21, 2002, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated October 16, 2002, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated November 20, 2002, File No. 1-3164, as Exhibit 4.2(a), in Form 8-K dated December 6, 2002, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 11, 2003, File No. 1-3164, as ExhibitsExhibit 4.2(a) and 4.2(b), in Form 8-K dated March 12, 2003, File No. 1-3164, as Exhibit 4.2 in Form 8-K dated April 15, 2003, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 1, 2003, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 14, 2003, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 10, 2004, File No. 1-3164, as Exhibit 4.2 in Form 8-K dated April 7, 2004, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 19, 2004, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 9, 2004, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated March 8, 2005, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated January 11, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated January 13, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated February 1, 2006, File No. 1-3164, as Exhibits 4.2(a) and 4.2(b), in Form 8-K dated March 9, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated June 7, 2006, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated January 30, 2007, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated April 4, 2007, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated October 11, 2007, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated December 4, 2007, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 8, 2008, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 14, 2008, File No. 1-3164 as Exhibit 4.2, in Form 8-K dated February 26, 2009, File No. 1-3164 as Exhibit 4.2, in Form 8-K dated September 27, 2010, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated March 3, 2011, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated May 18, 2011, File No. 1-3164, as ExhibitsExhibit 4.2(a) and 4.2(b), in Form 8-K dated May 18, 2011, File No. 1-3164, as Exhibit 4.2(b), in Form 8-K dated January 10, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated October 9, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated November 27, 2012, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated December 3, 2013, File No. 1-3164, as Exhibit 4.2, in Form 8-K dated August 20, 2014, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated March 5, 2015, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated April 9, 2015, File No. 1-3164, as Exhibit 4.6(b), and in Form 8-K dated January 8, 2016, File No. 1-3164, as Exhibit 4.6.4.6, in Form 8-K dated February 27, 2017, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated November 2, 2017, File No. 1-3164, as Exhibit 4.6, in Form 8-K dated June 21, 2018, File No. 1-3164, as Exhibit 4.6, and in Form 8-K dated September 12, 2019, File No. 1-3164, as Exhibit 4.6.)
   (b) 3  
Amended and Restated Trust Agreement of Alabama Power Capital Trust V dated as of SeptemberOctober 1, 2002. (Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.12-B.)
   (b) 4  
Guarantee Agreement relating to Alabama Power Capital Trust V dated as of SeptemberOctober 1, 2002. (Designated(Designated in Form 8-K dated September 26, 2002, File No. 1-3164, as Exhibit 4.16-B.)

*(b)5
  Georgia Power
   (c) 1  
Senior Note Indenture dated as of January 1, 1998, between Georgia Power and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through March 8, 2016.January 10, 2020. (Designated in Form 8-K dated January 21, 1998, File No. 1-6468, as Exhibits 4.1 and 4.2, in Forms 8-K each dated November 19, 1998, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated March 3, 1999, File No. 1-6469 as Exhibit 4.2, in Form 8-K dated February 15, 2000, File No. 1-6469 as Exhibit 4.2, in Form 8-K dated January 26, 2001, File No. 1-6469 as Exhibits 4.2(a) and 4.2(b), in Form 8-K dated February 16, 2001, File No. 1-6469 as Exhibit 4.2, in Form 8-K dated May 1, 2001, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated June 27, 2002, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated November 15, 2002, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated February 13, 2003, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated February 21, 2003, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated April 10, 2003, File No. 1-6468, as Exhibits 4.1, 4.2 and 4.3, in Form 8-K dated September 8, 2003, File No. 1-6468, as Exhibit 4.1, in Form 8-K dated September 23, 2003, File No. 1-6468, as Exhibit 4.1, in Form 8-K dated January 12, 2004, File No. 1-6468, as Exhibits 4.1 and 4.2, in Form 8-K dated February 12, 2004, File No. 1-6468, as Exhibit 4.1, in Form 8-K dated August 11, 2004, File No. 1-6468, as Exhibits 4.1 and 4.2, in Form 8-K dated January 13, 2005, File No. 1-6468, as Exhibit 4.1, in Form 8-K dated April 12, 2005, File No. 1-6468, as Exhibit 4.1, in Form 8-K dated November 30, 2005, File No. 1-6468, as Exhibit 4.1, in Form 8-K dated December 8, 2006, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated March 6, 2007, File No. 1-6468, as Exhibit 4.2 in Form 8-K dated June 4, 2007, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated June 18, 2007, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated July 10, 2007, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated August 24, 2007, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated November 29, 2007, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated March 12, 2008, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated June 5, 2008, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated November 12, 2008, File No. 1-6468, as Exhibits 4.2(a) and 4.2(b), in Form 8-K dated February 4, 2009, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated December 8, 2009, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated March 9, 2010, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated May 24, 2010, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated August 26, 2010, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated September 20, 2010, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated January 13, 2011, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated April 12, 2011, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated February 29, 2012, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated May 8, 2012, File No. 1-6468, as Exhibit 4.2(b), in Form 8-K dated August 7, 2012, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated November 8, 2012, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated March 12, 2013, File No. 1-6468, as ExhibitsExhibit 4.2(a) and 4.2(b), in Form 8-K dated August 12, 2013, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated December 1, 2015, File No. 1-6468, as Exhibit 4.2, and in Form 8-K dated March 2, 2016, File No. 1-6468, as ExhibitsExhibit 4.2(a), in Form 8-K dated March 2, 2016, File No. 1-6468, as Exhibit 4.2(b), in Form 8-K dated February 28, 2017, File No. 1-6468, as Exhibit 4.2(a), in Form 8-K dated February 28, 2017, File No. 1-6468, as Exhibit 4.2(b), in Form 8-K dated August 3, 2017, File No. 1-6468, as Exhibit 4.2, in Form 8-K dated September 4, 2019, File No. 1-6468, as Exhibit 4.2(a), in Form 8-K dated September 4, 2019, File No. 1-6468, as Exhibit 4.2(b), in Form 8-K dated January 8, 2020, File No. 1-6468, as Exhibit 4.2(b), and 4.2(b)in Form 8-K dated January 8, 2020, File No. 1-6468, as Exhibit 4.2(c).)
   (c) 2  Loan Guarantee Agreement
Subordinated Note Indenture, dated as of September 1, 2017, between Georgia Power and the DOE datedWells Fargo Bank, National Association, as of February 20, 2014, Amendment No. 1Trustee, and First Supplemental Indenture thereto dated as of June 4, 2015, and Amendment No. 2 thereto dated as of March 9, 2016.September 21, 2017. (Designated in Form 8-K dated February 20, 2014,September 18, 2017, File No. 1-6468, as Exhibit 4.1,4.3, and in Form 10-Q for the quarter ended June 30, 2015,8-K dated September 18, 2017, File No. 1-6468, as Exhibit 10(c)1, and in Form 10-Q for the quarter ended March 31, 2016, File No. 1-6468, as Exhibit 4(c)3.4.4.)
   (c) 3  
Amended and Restated Loan Guarantee Agreement, dated as of March 22, 2019, between Georgia Power and the DOE. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.1.)
(c)4
Note Purchase Agreement among Georgia Power, the DOE, and the Federal Financing Bank dated as of February 20, 2014. (Designated(Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.2.)
(c)4Future Advance Promissory Note dated February 20, 2014 made by Georgia Power to the FFB. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.3.)
   (c) 5  Deed to Secure Debt, Security Agreement and Fixture Filing between
Future Advance Promissory Note dated February 20, 2014 made by Georgia Power and PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association dated as of February 20, 2014. (Designatedto the FFB. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.4.4.3.)
(c)6Owners Consent to Assignment and Direct Agreement and Amendment to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement by and among Georgia Power, OPC, MEAG Power, and Dalton dated as of February 20, 2014. (Designated in Form 8-K dated February 20, 2014, File No. 1-6468, as Exhibit 4.5.)


  Gulf(c)6
Amended and Restated Deed to Secure Debt, Security Agreement and Fixture Filing, dated as of March 22, 2019, by Georgia Power to PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.4.)
(c)7
Amended and Restated Owners Consent to Assignment and Direct Agreement and Amendment to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of March 22, 2019, among Georgia Power, the other Vogtle Owners, the DOE, and PNC Bank, National Association, doing business as Midland Loan Services Inc., a division of PNC Bank, National Association. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.5.)
(c)8
Note Purchase Agreement, dated as of March 22, 2019, between Georgia Power, the DOE, and the FFB. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.2.)
(c)9
Promissory Note of Georgia Power, dated as of March 22, 2019. (Designated in Form 8-K dated March 22, 2019, File No. 1-6468, as Exhibit 4.3.)
*(c)10
Mississippi Power
   (d) 1  Senior Note Indenture dated as of January 1, 1998, between Gulf Power and Wells Fargo Bank, National Association, as Successor Trustee, and indentures supplemental thereto through September 23, 2014. (Designated in Form 8-K dated June 17, 1998, File No. 0-2429, as Exhibits 4.1 and 4.2, in Form 8-K dated August 17, 1999, File No. 0-2429, as Exhibit 4.2, in Form 8-K dated July 31, 2001, File No. 0-2429, as Exhibit 4.2, in Form 8-K dated October 5, 2001, File No. 0-2429, as Exhibit 4.2, in Form 8-K dated January 18, 2002, File No. 0-2429, as Exhibit 4.2, in Form 8-K dated March 21, 2003, File No. 0-2429, as Exhibit 4.2, in Form 8-K dated July 10, 2003, File No. 001-31737, as Exhibits 4.1 and 4.2, in Form 8-K dated September 5, 2003, File No. 001-31737, as Exhibit 4.1, in Form 8-K dated April 6, 2004, File No. 001-31737, as Exhibit 4.1, in Form 8-K dated September 13, 2004, File No. 001-31737, as Exhibit 4.1, in Form 8-K dated August 11, 2005, File No. 001-31737, as Exhibit 4.1, in Form 8-K dated October 27, 2005, File No. 001-31737, as Exhibit 4.1, in Form 8-K dated November 28, 2006, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated June 5, 2007, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated June 22, 2009, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated April 6, 2010, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated September 9, 2010, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated May 12, 2011, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated May 15, 2012, File No. 001-31737, as Exhibit 4.2, in Form 8-K dated June 10, 2013, File No. 001-31737, as Exhibit 4.2, and in Form 8-K dated September 16, 2014, File No. 001-31737, as Exhibit 4.2.)
Mississippi Power
(e)1
Senior Note Indenture dated as of May 1, 1998, between Mississippi Power and Wells Fargo Bank, National Association, as Successor Trustee, and certain indentures supplemental thereto through March 9, 2012.27, 2018. (Designated in Form 8-K dated May 14, 1998, File No. 001-11229, as ExhibitsExhibit 4.1 4.2(a) and 4.2(b), in Form 8-K dated March 22, 2000, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated March 12, 2002, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated April 24, 2003, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated March 3, 2004, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated June 24, 2005, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated November 8, 2007, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated November 14, 2008, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated March 3, 2009, File No. 001-11229, as Exhibit 4.2, in Form 8-K dated October 11, 2011, File No. 001-11229, as Exhibits 4.2(a) andExhibit 4.2(b), and in Form 8-K dated March 5, 2012, File No. 001-11229, as Exhibit 4.2(b).)
(e)2Term Loan Agreement among Mississippi Power and the lenders identified therein,, in Form 8-K dated as of March 8, 2016. (Designated in Form 10-Q for the quarter ended March 31, 2016,22, 2018, File No. 001-11229, as Exhibit 4(e)1.4.2(a) and in Form 8-K dated March 22, 2018, File No. 001-11229, as Exhibit 4.2(b).)
  Southern Power
   (f)(e) 1  
*(e)2
  Southern Company Gas
   (g)(f) 1  
Indenture dated February 20, 2001 between AGL Capital Corporation, AGL Resources Inc., and TheWells Fargo Bank, of New York,National Association, as Successor Trustee. (Designated(Designated in Form S-3, File No. 333-69500, as Exhibit 4.2.)
(f)2
Southern Company Gas Capital Corporation's 6.00% Senior Notes due 2034, Form of 3.50% Senior Notes due 2021, 5.875% Senior Notes due 2041, Form of Series B Senior Notes due 2018, 4.40% Senior Notes due 2043, 3.875% Senior Notes due 2025, 3.250% Senior Notes due 2026, Form of 2.450% Senior Note due October 1, 2023, Form of 3.950% Senior Note due October 1, 2046, and Form of Series 2017A 4.400% Senior Note due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated August 31, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(a), in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.1(b), and in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.1, respectively.)


   (g)2
Southern Company Gas Capital Corporation's 6.00% Senior Notes due 2034, 6.375% Senior Notes due2016, 5.25% Senior Notes due 2019, Form of 3.50% Senior Notes due 2021, 5.875% Senior Notes due 2041, Form of Series A Senior Notes due 2016, Form of Series B Senior Notes due 2018, 4.40% Senior Notes due 2043, 3.875% Senior Notes due 2025, 3.250% Senior Notes due 2026, Form of 2.450% Senior Note due October 1, 2023, and Form of 3.950% Senior Note due October 1, 2046. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated December 11, 2007, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated August 5, 2009, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.1, in Form 8-K dated August 31, 2011, File No. 1-14174, as Exhibits 4.1 and 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.2, and in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibits 4.1(a) and 4.1(b), respectively.)
(g)(f) 3  
Southern Company Gas' Guarantee related to the 6.00% Senior Notes due 2034, Guarantee related to the 6.375% Senior Notes due 2016, Guarantee related to the 5.25% Senior Notes due 2019, Guarantee related to the 5.875% Senior Notes due 2041, Form of Guarantee related to the 3.50% Senior Notes due 2021, Guarantee related to the 4.40% Senior Notes due 2043, Guarantee related to the 3.875% Senior Notes due 2025, Guarantee related to the 3.250% Senior Notes due 2026, Form of Guarantee related to the 2.450% Senior Notes due October 1, 2023, and Form of Guarantee related to the 3.950% Senior Notes due October 1, 2046.2046, and Form of Guarantee related to the Series 2017A 4.400% Senior Notes due May 30, 2047. (Designated in Form 8-K dated September 22, 2004, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated December 11, 2007, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated August 5, 2009, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated March 16, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated September 15, 2011, File No. 1-14174, as Exhibit 4.2, in Form 8-K dated May 13, 2013, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated November 13, 2015, File No. 1-14174, as Exhibit 4.3, in Form 8-K dated May 13, 2016, File No. 1-14174, as Exhibit 4.3 and, in Form 8-K dated September 8, 2016, File No. 1-14174, as ExhibitsExhibit 4.3(a), in Form 8-K dated September 8, 2016, File No. 1-14174, as Exhibit 4.3(b), and 4.3(b)in Form 8-K dated May 5, 2017, File No. 1-14174, as Exhibit 4.3, respectively.)
   (g)(f) 4  Indenture dated December 1, 1989 of Atlanta Gas Light Company and First Supplemental Indenture thereto dated March 16, 1992. (Designated in Form S-3, File No. 33-32274, as Exhibit 4(a) and in Form S-3, File No. 33-46419, as Exhibit 4(a).)
   (g)(f) 5  
Indenture of Commonwealth Edison Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated as of January 1, 1954, Indenture of Adoption of Northern Illinois Gas Company to Continental Illinois National Bank and Trust Company of Chicago, Trustee, dated February 9, 1954, and certain indentures supplemental thereto. (Designated in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as ExhibitsExhibit 4.01 and, in Form 10-K for the year ended December 31, 1995, File No. 1-7296, as Exhibit 4.02, in Registration No. 2-56578 as Exhibits 2.21 and 2.25, in Form 10-Q for the quarter ended June 30, 1996, File No. 1-7296, as Exhibit 4.01, in Form 10-K for the year ended December 31, 1997, File No. 1-7296, as Exhibit 4.19, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as ExhibitsExhibit 4.09, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.10 and, in Form 10-K for the year ended December 31, 2003, File No. 1-7296, as Exhibit 4.11, in Form 10-K for the year ended December 31, 2006, File No. 1-7296, as Exhibit 4.11, in Form 10-Q for the quarter ended September 30, 2008, File No. 1-7296, as Exhibit 4.01, in Form 10-Q for the quarter ended June 31, 2009, File No. 1-7296, as Exhibit 4.01, and in Form 10-Q for the quarter ended September 30, 2012, File No. 1-7296, as Exhibit 4.4, in Form 10-K for the year ended December 31, 2016, File No. 1-14174, as Exhibit 4(g)6, in Form 10-K for the year ended December 31, 2017, File No. 1-14174, as Exhibit 4(g)6, and in Form 10-Q for the quarter ended September 30, 2018, File No. 1-14174, as Exhibit 4(g)1.)
  *(g)(f) 6  
          
(10) Material Contracts
  Southern Company
  #(a) 1  
Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. (Designated(Designated in Form 8-K dated May 25, 2011, File No. 1-3526, as Exhibit 10.1.)
  #(a) 2  
Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2011, File No. 1-3526, as Exhibit 10(a)3.3.)
  #(a) 3  
Deferred Compensation Plan for Outside Directors of The Southern Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-3526, as Exhibit 10(a)3 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3526, as Exhibit 10(a)1.2.)
#(a)4
Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2018, First Amendment thereto dated as of December 7, 2018, and Second Amendment thereto dated as of January 29, 2019. (Designated in Form 10-K for the year ended December 31, 2017, File No. 1-3536, as Exhibit 10(a)4, in Form 10-K for the year ended December 31, 2018, File No. 1-3536, as Exhibit 10(a)21, and in Form 10-K for the year ended December 31, 2018, File No. 1-3536, as Exhibit 10(a)22.)


  #(a) 4Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2009, First Amendment thereto effective January 1, 2010, and Second Amendment thereto effective October 29, 2014. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)4, in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)5, and in Form 10-K for the year ended December 31, 2015, File No. 1-3526, as Exhibit 10(a)21.)
#(a)5  
The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016.2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, and Amendment No. 5 thereto effective January 1, 2019. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)1.1, in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)18, in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)16, in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)1, in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)23, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)24.)
  #(a) 6  
The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016.2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, and Amendment No 5 thereto effective January 1, 2019. (Designated in Form 10-Q for the quarter ended June 30, 2016, File No. 1-3526, as Exhibit 10(a)2.2, in Form 10-K for the year ended December 31, 2016, File No. 1-3536, as Exhibit 10(a)19, in Form 10-K for the year ended December 31, 2017, File No. 1-3526, as Exhibit 10(a)17, in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)2, in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)25, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)26.)
  #(a) 7  
The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. (Designated2008 and Amendment No. 1 thereto effective March 1, 2018. (Designated in Form 8-K dated December 31, 2008, File No. 1-3526, as Exhibit 10.1.10.1 and in Form 10-Q for the quarter ended March 31, 2018, File No. 1-3526, as Exhibit 10(a)3.)
  #(a) 8  
Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern LINC,Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)103 and in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)16.16.)
  #(a) 9  
Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power, and First Amendment thereto effective January 1, 2009.2009 and Second Amendment thereto effective December 29, 2018. (Designated in Form 10-K for the year ended December 31, 2000, File No. 1-3526, as Exhibit 10(a)104 and, in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)18.18, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)27.)
  #(a) 10  
Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power, and First Amendment thereto effective January 1, 2009.2009, and Second Amendment thereto effective December 21, 2018. (Designated in Form 10-K for the year ended December 31, 2001, File No. 1-3526, as Exhibit 10(a)92 and, in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)20.20, and in Form 10-K for the year ended December 31, 2018, File No. 1-3526, as Exhibit 10(a)28.)
  #(a) 11  
Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)23, in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)22, and in Form 10-K for the year ended December 31, 2010, File No. 1-3526, as Exhibit 10(a)16.16.)

  #(a) 12  
Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-3526, as Exhibit 10(a)24 and in Form 10-K for the year ended December 31, 2009, File No. 1-3526, as Exhibit 10(a)24.24.)
  #(a) 13  
Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-K10-Q for the yearquarter ended DecemberMarch 31, 2014,2017, File No. 1-3526, as Exhibit 10(a)17)1).
  #(a) 14  
Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. (Designated in Definitive Proxy Statement filed April 10, 2015, File No. 1-3526, as Appendix A.A.)
  #(a) 15  Commitment Letter dated August 23, 2015. (Designated in Form 8-K dated August 23, 2015, File No. 1-3526, as Exhibit 10.1.)
(a)16Bridge Credit Agreement dated as of September 30, 2015, among Southern Company, as the Borrower, the Lenders identified therein, and Citibank, N.A., as Administrative Agent. (Designated in Form 8-K dated September 30, 2015, File No. 1-3526, as Exhibit 10.1.)
#   *(a)17
Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008.
(Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 10(a)17.)

(a)16
The Southern Company Employee Savings Plan, Amended and Restated effective January 1, 2018. (Designated in Post-Effective Amendment No. 1 to Form S-8, File No. 333-212783 as Exhibit 4.3.)
#(a)17
Form of Terms for Restricted Stock Unit with Performance Measure Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)2.)
#(a)18
Letter Agreement among Southern Company Gas, Southern Company, and Andrew W. Evans and Performance Stock Unit Award Agreement, dated September 29, 2016. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)3.)
#(a)19
Form of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2017, File No. 1-3526, as Exhibit 10(a)4.)
#(a)20
Performance Stock Units Agreement, dated May 23, 2018, between Southern Company and Stephen E. Kuczynski. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)1.)
#(a)21
Retention and Restricted Stock Unit Agreement, dated May 23, 2018, between Southern Company and Stephen E. Kuczynski. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)2.)
#(a)22
Form of Terms for 2019 Equity Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. (Designated in Form 10-Q for the quarter ended March 31, 2019, File No. 1-3526, as Exhibit 10(a)3.)
  #   *(a) 1823  First
#   *(a)24
  #   *(a) 1925  
*(a)26
*(a)27
  Alabama Power
   (b) 1  
Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS.SCS and Appendix A thereto dated as of January 1, 2019. (Designated in Form 10-Q for the quarter ended March 31, 2007, File No. 1-3164, as Exhibit 10(b)5.5 and in Form 10-K for the year ended December 31, 2018, File No. 1-3164, as Exhibit 10(b)2.)
  #(b) 2  Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See Exhibit 10(a)1 herein.

  #(b) 3  Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. See Exhibit 10(a)2 herein.
  #(b) 4  Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2009,2018, First Amendment thereto effective January 1, 2010,dated as of December 7, 2018, and Second Amendment thereto effective Octoberdated as of January 29, 2014.2019. See Exhibit 10(a)4 herein.
  #(b) 5  The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016.2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto effective December 4, 2018, and Amendment No. 5 thereto effective January 1, 2019. See Exhibit 10(a)5 herein.
  #(b) 6  The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016.2016, Amendment No. 1 thereto effective January 1, 2017, Amendment No. 2 thereto effective January 1, 2018, Amendment No. 3 thereto effective April 1, 2018, Amendment No. 4 thereto dated December 14, 2018, and Amendment No 5 thereto effective January 1, 2019. See Exhibit 10(a)6 herein.
  #(b) 7  Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
  #(b) 8  
Deferred Compensation Plan for Outside Directors of Alabama Power Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective June 1, 2015. (Designated in Form 10-Q for the quarter ended June 30, 2008, File No. 1-3164, as Exhibit 10(b)1 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-3164, as Exhibit 10(b)1.1.)
  #(b) 9  The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.
  #(b) 10  Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern LINC,Linc, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
  #(b) 11  Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power, and First Amendment thereto effective January 1, 2009.2009 and Second Amendment thereto effective December 29, 2018. See Exhibit 10(a)9 herein.
  #(b) 12  Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power, and First Amendment thereto effective January 1, 2009.2009, and Second Amendment thereto effective December 21, 2018. See Exhibit 10(a)10 herein.
  #(b) 13  Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
  #(b) 14  Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
  #(b) 15  
Deferred Compensation Agreement between Southern Company, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, and SCS and Philip C. Raymond dated September 15, 2010. (Designated in Form 10-Q for the quarter ended September 30, 2010, File No. 1-3164, as Exhibit 10(b)2.2.)
  #(b) 16  Deferred Compensation Agreement between Southern Company, SCS, Alabama Power, and Mark A. Crosswhite, effective July 30, 2008. See Exhibit 10(a)1715 herein.
  #(b) 17  Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.


  #(b) 18  Employment Agreement between Alabama Power and Steven R. Spencer effective April 1, 2016. (Designated in Form 10-Kof Terms for Restricted Stock Unit with Performance Measure Awards granted under the year ended December 31, 2015, File No. 1-3164, asSouthern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(b)21.10(a)17 herein.
  #(b) 19  First Amendment to TheForm of Time-Vesting Restricted Stock Unit Awards granted under the Southern Company Supplemental Executive Retirement Plan effective January 1, 2017.2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)1819 herein.
  #(b) 20  FirstForm of Terms for 2019 Equity Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)22 herein.
#(b)21Sixth Amendment to Thethe Southern Company Supplemental Benefit Plan effective January 1, 2017.2019. See Exhibit 10(a)1924 herein.
#(b)22Sixth Amendment to The Southern Company Supplemental Executive Retirement Plan effective January 1, 2019. See Exhibit 10(a)25 herein.
  Georgia Power
   (c) 1  Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS.SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
   (c) 2  Revised and Restated Integrated Transmission System Agreement dated as of November 12, 1990, between Georgia Power and OPC. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(g).)
   (c) 3  Revised and Restated Integrated Transmission System Agreement between Georgia Power and Dalton dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(gg).)
   (c) 4  Revised and Restated Integrated Transmission System Agreement between Georgia Power and MEAG Power dated as of December 7, 1990. (Designated in Form 10-K for the year ended December 31, 1990, File No. 1-6468, as Exhibit 10(hh).)
  #(c) 5  Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See
Settlement Agreement dated as of June 9, 2017, by and among Georgia Power, OPC, MEAG Power, Dalton, and Toshiba and Amendment No. 1 thereto dated as of December 8, 2017. (Designated in Form 8-K dated June 16, 2017, File No. 1-6468, as Exhibit 10(a)1 herein.10.1 and in Form 8-K dated December 8, 2017, File No. 1-6468, as Exhibit 10.1.)
  #(c) 6  
Amended and Restated Services Agreement dated as of June 20, 2017, by and among Georgia Power, for itself and as agent for OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, and Westinghouse and WECTEC Global Project Services, Inc. (Georgia Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filing and filed them separately with the SEC.) (Designated in Form of Stock Option Award Agreement10-Q for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. Seequarter ended June 30, 2017, File No. 1-6468, as Exhibit 10(a)2 herein.10(c)9.)
  #(c) 7  Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2009, First Amendment thereto effective January 1, 2010, and Second Amendment thereto effective October 29, 2014. See Exhibit 10(a)4 herein.
#(c)8The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016. See Exhibit 10(a)5 herein.
#(c)9The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016. See Exhibit 10(a)6 herein.
#(c)10Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
#(c)11Deferred Compensation Plan For Outside Directors of Georgia Power Company, Amended and Restated Effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-6468, as Exhibit 10(c)12 and in Form 10-Q for the quarter ended March 31, 2015, File No. 1-6468, as Exhibit 10(c)2.)
#(c)12The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.
#(c)13Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern LINC, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
#(c)14Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)9 herein.
#(c)15Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)10 herein.

#(c)16Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
(c)17Engineering, Procurement and Construction Completion Agreement dated as of April 8, 2008,October 23, 2017, between Georgia Power, for itself and as agent for OPC, MEAG Power, MEAG Power SPVJ, LLC, MEAG Power SPVM, LLC, MEAG Power SPVP, LLC, and Dalton, as owners, and a consortium consisting of Westinghouse Electric Company LLCBechtel and Stone & Webster, Inc., as contractor, for Units 3 & 4 at the Vogtle Electric Generating Plant Site, Amendment No. 1 thereto dated as of December 11, 2009, Amendment No. 2 thereto dated as of January 15, 2010, Amendment No. 3 thereto dated as of February 23, 2010, Amendment No. 4 thereto dated as of May 2, 2011, Amendment No. 5 thereto dated as of February 7, 2012, Amendment No. 6 thereto dated as of January 23, 2014, Amendment No. 7 thereto dated as of January 6, 2016, and Amendment No. 8 thereto dated as of April 20, 2016.October 12, 2018. (Georgia Power has requested confidential treatment for certain portions of these documents pursuant to applications for confidential treatment sent to the SEC. Georgia Power omitted such portions from the filings and filed them separately with the SEC.) (Designated in Form 10-Q/A10-K for the quarteryear ended June 30, 2008,December 31, 2017, File No. 1-6468, as Exhibit 10(c)8 and in Form 10-K for the year ended December 31, 2018, File No. 1-6468, as Exhibit 10(c)10.)
*(c)8

(c)9
Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement dated as of April 21, 2006, among Georgia Power, OPC, MEAG Power, and The City of Dalton, Georgia, Amendment 1 thereto dated as of April 8, 2008, Amendment 2 thereto dated as of February 20, 2014, Agreement Regarding Additional Participating Party Rights and Amendment 3 thereto dated as of November 2, 2017, and First Amendment to Agreement Regarding Additional Participating Party Rights and Amendment No. 3 to Plant Alvin W. Vogtle Additional Units Ownership Participation Agreement, dated as of August 31, 2018. (Designated in Form 8-K dated April 21, 2006, File No. 33-7591, as Exhibit 10.4.4, in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(a), in Form 10-K for the year ended December 31, 2013, File No. 000-53908, as Exhibit 10.3.2(b), in Form 10-Q for the quarter ended September 30, 2017, File No. 000-53908, as Exhibit 10.1, and in Form 8-K dated August 31, 2018, File No. 1-6468, as Exhibit 10.1.)
(c)10
  #(c)18Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
#(c)19Deferred Compensation Agreement between Southern Company, Southern Company Services, Inc., and John L. Pemberton, effective October 10, 2008. (Designated in Form 10-Q for the quarter ended March 31, 2015, File No. 1-6468, as Exhibit 10(c)3.)
#(c)20Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.
#(c)21First Amendment to The Southern Company Supplemental Executive Retirement Plan effective January 1, 2017. See Exhibit 10(a)18 herein.
#(c)22First Amendment to The Southern Company Supplemental Benefit Plan effective January 1, 2017. See Exhibit 10(a)19 herein.
GulfMississippi Power
   (d) 1  Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS. See Exhibit 10(b)1 herein.
#(d)2Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See Exhibit 10(a)1 herein.
#(d)3Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. See Exhibit 10(a)2 herein.
#(d)4Southern Company Deferred Compensation Plan, AmendedSCS and RestatedAppendix A thereto dated as of January 1, 2009, First Amendment thereto effective January 1, 2010, and Second Amendment thereto effective October 29, 2014. See Exhibit 10(a)4 herein.
#(d)5The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016. See Exhibit 10(a)6 herein.
#(d)6Southern Company Executive Change in Control Severance Plan, Amended and Restated effective June 30, 2016 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
#(d)7The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016. See Exhibit 10(a)5 herein.
#(d)8Deferred Compensation Plan For Outside Directors of Gulf Power Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-Q for the quarter ended March 31, 2008, File No. 0-2429, as Exhibit 10(d)1 and in Form 10-Q for the quarter ended June 30, 2015, File No. 001-11229, as Exhibit 10(d)1.)
#(d)9The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.

#(d)10Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern LINC, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
#(d)11Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)9 herein.
#(d)12Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)10 herein.
#(d)13Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
#(d)14Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
#(d)15Deferred Compensation Agreement between Southern Company, Georgia Power, Gulf Power, and Southern Nuclear and Bentina C. Terry dated August 1, 2010. (Designated in Form 10-Q for the quarter ended September 30, 2010, File No. 001-31737, as Exhibit 10(d)2.)
#(d)16Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.
#(d)17First Amendment to The Southern Company Supplemental Executive Retirement Plan effective January 1, 2017. See Exhibit 10(a)18 herein.
#(d)18First Amendment to The Southern Company Supplemental Benefit Plan effective January 1, 2017. See Exhibit 10(a)19 herein.
Mississippi Power
(e)1Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS.2019. See Exhibit 10(b)1 herein.
   (e)(d) 2  Transmission Facilities Agreement dated February 25, 1982, Amendment No. 1 dated May 12, 1982 and Amendment No. 2 dated December 6, 1983, between Entergy Corporation (formerly Gulf States) and Mississippi Power. (Designated in Form 10-K for the year ended December 31, 1981, File No. 001-11229, as Exhibit 10(f), in Form 10-K for the year ended December 31, 1982, File No. 001-11229, as Exhibit 10(f)(2), and in Form 10-K for the year ended December 31, 1983, File No. 001-11229, as Exhibit 10(f)(3).)
  #(e)(d) 3  Southern Company 2011 Omnibus Incentive Compensation Plan effective May 25, 2011. See Exhibit 10(a)1 herein.
#(e)4Form of Stock Option Award Agreement for Executive Officers of Southern Company under the Southern Company Omnibus Incentive Compensation Plan. See Exhibit 10(a)2 herein.
#(e)5Southern Company Deferred Compensation Plan, Amended and Restated as of January 1, 2009, First Amendment thereto effective January 1, 2010, and Second Amendment thereto effective October 29, 2014. See Exhibit 10(a)4 herein.
#(e)6The Southern Company Supplemental Benefit Plan, Amended and Restated effective as of June 30, 2016. See Exhibit 10(a)6 herein.
#(e)7Southern Company Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008 and First Amendment thereto effective January 1, 2010. See Exhibit 10(a)12 herein.
#(e)8The Southern Company Supplemental Executive Retirement Plan, Amended and Restated effective June 30, 2016. See Exhibit 10(a)5 herein.
#(e)9Deferred Compensation Plan for Outside Directors of Mississippi Power Company, Amended and Restated effective January 1, 2008 and First Amendment thereto effective April 1, 2015. (Designated in Form 10-Q for the quarter ended March 31, 2008, File No. 001-11229 as Exhibit 10(e)1 and in Form 10-Q for the quarter ended June 30, 2015, File No. 001-11229 as Exhibit 10(e)1.)

#(e)10The Southern Company Change in Control Benefits Protection Plan (an amendment and restatement of The Southern Company Change in Control Benefit Plan Determination Policy), effective December 31, 2008. See Exhibit 10(a)7 herein.
#(e)11Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, SCS, Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern LINC, Southern Company Energy Solutions, LLC, and Southern Nuclear and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)8 herein.
#(e)12Deferred Stock Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective January 1, 2000, between Reliance Trust Company, Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)9 herein.
#(e)13Deferred Cash Compensation Trust Agreement for Directors of Southern Company and its Subsidiaries, Amended and Restated effective September 1, 2001, between Wells Fargo Bank, N.A., as successor to Wachovia Bank, N.A., Southern Company, Alabama Power, Georgia Power, Gulf Power, and Mississippi Power and First Amendment thereto effective January 1, 2009. See Exhibit 10(a)10 herein.
#(e)14Southern Company Senior Executive Change in Control Severance Plan, Amended and Restated effective December 31, 2008, First Amendment thereto effective October 19, 2009, and Second Amendment thereto effective February 22, 2011. See Exhibit 10(a)11 herein.
(e)15Cooperative Agreement between the DOE and SCS dated as of December 12, 2008. (Designated in Form 10-K for the year ended December 31, 2008, File No. 001-11229, as Exhibit 10(e)22.22.) (Mississippi Power requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Mississippi Power omitted such portions from this filing and filed them separately with the SEC.)
#(e)16Form of Terms for Performance Share Awards granted under the Southern Company 2011 Omnibus Incentive Compensation Plan. See Exhibit 10(a)13 herein.
#(e)17Amended Deferred Compensation Agreement effective December 31, 2008 between Southern Company, SCS, Georgia Power, Gulf Power and G. Edison Holland, Jr. (Designated in Form 10-Q for the quarter ended March 31, 2011, File No. 001-11229, as Exhibit 10(a)2.)
#(e)18Outside Directors Stock Plan for The Southern Company and its Subsidiaries effective June 1, 2015. See Exhibit 10(a)14 herein.
#(e)19Letter Agreement between Mississippi Power and Emile J. Troxclair III dated December 11, 2014. (Designated in Form 10-Q for the quarter ended March 31, 2016, File No. 001-11229, as Exhibit 10(e)1.)
#(e)20Performance Award Agreement between Southern Company Services, Inc. and Emile J. Troxclair III effective as of January 3, 2015. (Designated in Form 10-Q for the quarter ended March 31, 2016, File No. 001-11229, as Exhibit 10(e)2.)
*(e)21Promissory Note dated November 10, 2015 between Mississippi Power and Southern Company.
*(e)22Amended and Restated Promissory Note dated December 22, 2015 between Mississippi Power and Southern Company.
*(e)23Promissory Note dated January 28, 2016 between Mississippi Power and Southern Company.
#(e)24First Amendment to The Southern Company Supplemental Executive Retirement Plan effective January 1, 2017. See Exhibit 10(a)18 herein.
#(e)25First Amendment to The Southern Company Supplemental Benefit Plan effective January 1, 2017. See Exhibit 10(a)19 herein.
  Southern Power
   (f)(e) 1Service contract dated as of January 1, 2001, between SCS and Southern Power Company. (Designated in Form 10-K for the year ended December 31, 2001, File No. 1-3526, as Exhibit 10(a)(2).)
(f)2  Intercompany Interchange Contract as revised effective May 1, 2007, among Alabama Power, Georgia Power, Gulf Power, Mississippi Power, Southern Power Company, and SCS.SCS and Appendix A thereto dated as of January 1, 2019. See Exhibit 10(b)1 herein.
Southern Company Gas
(f)1
Final Allocation Agreement dated January 3, 2008. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-7296, as Exhibit 10.15.)
(f)2
Asset Purchase Agreement, dated as of October 15, 2017, by and between Pivotal Utility Holdings, Inc., as Seller, and South Jersey Industries, Inc., as Buyer. (Designated in Form 8-K dated October 15, 2017, File No. 1-14174, as Exhibit 10.1.)


(f)3Amended and Restated Engineering, Procurement and Construction Agreement between Desert Stateline LLC and First Solar Electric (California), Inc. dated as of August 31, 2015. (Southern Power has requested confidential treatment for certain portions of this document pursuant to an application for confidential treatment sent to the SEC. Southern Power omitted such portions from the filing and filed them separately with the SEC.)(Designated in Form 10-Q for the quarter ended September 30, 2015, File No. 333-98533, as Exhibit 10(e)1.)
Southern Company Gas
#(g)1Form of Director Indemnification Agreement dated April 28, 2004. (Designated in Form 10-Q for the quarter ended June 30, 2004, File No. 1-14174, as Exhibit 10.3.)
#(g)2Nonqualified Savings Plan as amended and restated as of January 1, 2009, First Amendment effective December 18, 2009, Second Amendment effective January 1, 2013, and Third Amendment effective January 1, 2013. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-14174, as Exhibit 10.1.av and in Form 10-K for the year ended December 31, 2013, File No. 1-14174, as Exhibits 10.1.aa, 10.1.ab, and 10.1.ac.)
#(g)3Excess Benefit Plan as amended and restated as of January 1, 2009. (Designated in Form 10-K for the year ended December 31, 2008, File No. 1-14174, as Exhibit 10.1.az.)
(g)4Note Purchase Agreement dated August 31, 2011. (Designated in Form 8-K dated August 31, 2011, File No. 1-14174, as Exhibit 10.1.)
(g)5Final Allocation Agreement dated January 3, 2008. (Designated in Form 10-K for the year ended December 31, 2007, File No. 1-14174, as Exhibit 10.15.)
(g)6Second Amended and Restated Limited Liability Company Agreement of SouthStar Energy Services LLC dated September 6, 2013 by and between Georgia Natural Gas Company and Piedmont Energy Company. (Designated in Form 10-Q for the quarter ended September 30, 2013, File No. 1-14174, as Exhibit 10.)
(g)7Credit Agreement dated as of December 15, 2011 and First Amendment thereto dated as of February 26, 2013. Designated in Form 8-K dated December 9, 2011, File No. 1-14174, as Exhibit 10.1 and in Form 10-Q for the quarter ended June 30, 2015, File No. 1-14174, as Exhibit 10.2.)
(g)8Amended and Restated Credit Agreement dated as of November 10, 2011. (Designated in Form 8-K dated November 10, 2011, File No. 1-14174, as Exhibit 10.1.)
(g)9Second Amendment and Extension Agreement dated as of October 30, 2015. (Designated in Form 8-K dated October 30, 2015, File No. 1-14174, as Exhibit 10.1.)
(g)10Guarantee Agreement dated as of November 10, 2011. (Designated in Form 8-K dated November 10, 2011, File No. 1-14174, as Exhibit 10.2.)
(g)11Bank Rate Mode Covenants Agreement, dated as of February 26, 2013 and First Amendment to Bank Rate Mode Covenants Agreement dated as of October 30, 2015. (Designated in Form 8-K dated February 26, 2013, File No. 1-14174, as Exhibit 10.1 and in Form 8-K dated October 30, 2015, File No. 1-14174, as Exhibit 10.3.)
(g)12Loan Agreement dated as of February 1, 2013. (Designated in Form 8-K dated March 1, 2013, File No. 1-14174, as Exhibit 10.2.)
(g)13Loan Agreement dated as of March 1, 2013. (Designated in Form 8-K dated March 25, 2013, File No. 1-14174, as Exhibit 10.1.)
(g)14Amended and Restated Loan Agreement dated as of March 1, 2013. (Designated in Form 8-K dated March 25, 2013, File No. 1-14174, as Exhibit 10.2.)
(g)15Amended and Restated Loan Agreement dated as of March 1, 2013. (Designated in Form 8-K dated March 25, 2013, File No. 1-14174, as Exhibit 10.3.)
(g)16Amended and Restated Loan Agreement dated as of March 1, 2013. (Designated in Form 8-K dated March 25, 2013, File No. 1-14174, as Exhibit 10.4.)
(14) Code of Ethics
  Southern Company
  *(a)    
The Southern Company Code of Ethics. (Designated in Form 10-K for the year ended December 31, 2016, File No. 1-3526, as Exhibit 14(a).)
  Alabama Power
   (b)    The Southern Company Code of Ethics. See Exhibit 14(a) herein.
  Georgia Power
   (c)    The Southern Company Code of Ethics. See Exhibit 14(a) herein.

  GulfMississippi Power
   (d)    The Southern Company Code of Ethics. See Exhibit 14(a) herein.
  MississippiSouthern Power
   (e)    The Southern Company Code of Ethics. See Exhibit 14(a) herein.
  Southern PowerCompany Gas
   (f)    The Southern Company Code of Ethics. See Exhibit 14(a) herein.
Southern Company Gas
(g)The Southern Company Code of Ethics. See Exhibit 14(a) herein.
(21) Subsidiaries of Registrants
  Southern Company
  *(a)    
  Alabama Power
   (b)    Subsidiaries of Registrant. See Exhibit 21(a) herein.
  Georgia Power
   (c)SubsidiariesOmitted pursuant to General Instruction I(2)(b) of Registrant. See Exhibit 21(a) herein.
Gulf Power
(d)Subsidiaries of Registrant. See Exhibit 21(a) herein.Form 10-K.
  Mississippi Power
   (e)SubsidiariesOmitted pursuant to General Instruction I(2)(b) of Registrant. See Exhibit 21(a) herein.Form 10-K.
  Southern Power
   Omitted pursuant to General Instruction I(2)(b) of Form 10-K.
  Southern Company Gas
   Omitted pursuant to General Instruction I(2)(b) of Form 10-K10-K.
          
(23) Consents of Experts and Counsel
  Southern Company
  *(a) 1

  
  Alabama Power
  *(b) 1

  
  Georgia Power
  *(c) 1

  
  GulfMississippi Power
  *(d) 1

  
  Southern Power
  *(f)(e) 1

  
  Southern Company Gas
  *(g)(f) 1

  
  *(g)(f) 2

  
  *(g)(f) 3

  
          

(24) Powers of Attorney and Resolutions
  Southern Company
  *(a)    
  Alabama Power
  *(b)    
  Georgia Power
  *(c)    

  GulfMississippi Power
  *(d)    
  MississippiSouthern Power
  *(e)    
  Southern PowerCompany Gas
  *(f)    
Southern Company Gas
*(g)Power of Attorney and resolution.
          
(31) Section 302 Certifications
  Southern Company
  *(a) 1  
  *(a) 2  
  Alabama Power
  *(b) 1  
  *(b) 2  
  Georgia Power
  *(c) 1  
  *(c) 2  
  GulfMississippi Power
  *(d) 1  
  *(d) 2  
  MississippiSouthern Power
  *(e) 1  Certificate of Mississippi Power's Chief Executive Officer required by Section 302 of the Sarbanes-Oxley Act of 2002.
*(e)2Certificate of Mississippi Power's Chief Financial Officer required by Section 302 of the Sarbanes-Oxley Act of 2002.
Southern Power
*(f)1
  *(f)(e) 2  
  Southern Company Gas
  *(g)(f) 1  
  *(g)(f) 2  
          


  Georgia Power
  *(c)    
  GulfMississippi Power
  *(d)    Certificate of Gulf Power's Chief Executive Officer and Chief Financial Officer required by Section 906 of the Sarbanes-Oxley Act of 2002.
Mississippi Power
*(e)
  Southern Power
  *(f)(e)    
  Southern Company Gas
  *(g)(f)    
          
(99) Additional Exhibits
  Southern Company Gas
  *(g)(f)    
          
(101)XBRL-Related Documents
  *INS   XBRL Instance Document – The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document.
  *SCH   XBRL Taxonomy Extension Schema Document
  *CAL   XBRL Taxonomy Calculation Linkbase Document
  *DEF   XBRL Definition Linkbase Document
  *LAB   XBRL Taxonomy Label Linkbase Document
  *PRE   XBRL Taxonomy Presentation Linkbase Document
(104)Cover Page Interactive Data File
*Formatted as inline XBRL with applicable taxonomy extension information contained in Exhibits 101.

** Schedules and exhibits have been omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted schedule or exhibit will be furnished supplementally to the Securities and Exchange Commission upon request.
E-17Table of Contents                          ��     Index to Financial Statements

THE SOUTHERN COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
THE SOUTHERN COMPANY
By:Thomas A. Fanning
Chairman, President, and
Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Thomas A. Fanning
Chairman, President, and
Chief Executive Officer
(Principal Executive Officer)
Andrew W. Evans
Executive Vice President and Chief Financial Officer
(Principal Financial Officer)
Ann P. Daiss
Comptroller and Chief Accounting Officer
(Principal Accounting Officer)
Directors:
Janaki Akella
Juanita Powell Baranco
Jon A. Boscia
Henry A. Clark III
Anthony F. Earley, Jr.
David J. Grain
Donald M. James
John D. Johns
Dale E. Klein
Ernest J. Moniz
William G. Smith, Jr.
Steven R. Specker
Larry D. Thompson
E. Jenner Wood III
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020




ALABAMA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
ALABAMA POWER COMPANY
By:Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Mark A. Crosswhite
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
Philip C. Raymond
Executive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
Anita Allcorn-Walker
Vice President and Comptroller
(Principal Accounting Officer)
Directors:
Angus R. Cooper, III
O. B. Grayson Hall, Jr.
Anthony A. Joseph
James K. Lowder
Robert D. Powers
Catherine J. Randall
C. Dowd Ritter
R. Mitchell Shackleford, III
Phillip M. Webb
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020




GEORGIA POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
GEORGIA POWER COMPANY
By:W. Paul Bowers
Chairman, President, and Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
W. Paul Bowers
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
David P. Poroch
Executive Vice President, Chief Financial Officer, Treasurer, and Comptroller
(Principal Financial and Accounting Officer)
Directors:
Mark L. Burns
Shantella E. Cooper
Lawrence L. Gellerstedt III
Douglas J. Hertz
Thomas M. Holder
Kessel D. Stelling, Jr.
Charles K. Tarbutton
Beverly Daniel Tatum
Clyde C. Tuggle
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020




MISSISSIPPI POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
MISSISSIPPI POWER COMPANY
By:Anthony L. Wilson
Chairman, President, and Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Anthony L. Wilson
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
Moses H. Feagin
Vice President, Treasurer, and
Chief Financial Officer
(Principal Financial Officer)
Cynthia F. Shaw
Comptroller
(Principal Accounting Officer)
Directors:
Carl J. Chaney
L. Royce Cumbest
Thomas M. Duff
Mark E. Keenum
Christine L. Pickering
M.L. Waters
Camille S. Young
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020


Supplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:

Mississippi Power is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2019. Accordingly, Mississippi Power will not file an annual report with the Securities and Exchange Commission.





SOUTHERN POWER COMPANY
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
SOUTHERN POWER COMPANY
By:Mark S. Lantrip
Chairman and Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Mark S. Lantrip
Chairman and Chief Executive Officer
(Principal Executive Officer)
Elliott L. Spencer
Senior Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
Jelena Andrin
Comptroller
(Principal Accounting Officer)
Directors:
Stan W. Connally
Andrew W. Evans
Thomas A. Fanning
Kimberly S. Greene
James Y. Kerr, II
Christopher C. Womack
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020




SOUTHERN COMPANY GAS
SIGNATURES
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. The signature of the undersigned company shall be deemed to relate only to matters having reference to such company and any subsidiaries thereof.
SOUTHERN COMPANY GAS
By:Kimberly S. Greene
Chairman, President, and Chief Executive Officer
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date:February 19, 2020
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. The signature of each of the undersigned shall be deemed to relate only to matters having reference to the above-named company and any subsidiaries thereof.
Kimberly S. Greene
Chairman, President, and Chief Executive Officer
(Principal Executive Officer)
Daniel S. Tucker
Executive Vice President, Chief Financial Officer, and Treasurer
(Principal Financial Officer)
Grace A. Kolvereid
Senior Vice President and Comptroller
(Principal Accounting Officer)
Directors:
Sandra N. Bane
Thomas D. Bell, Jr.
Charles R. Crisp
Brenda J. Gaines
John E. Rau
James A. Rubright
By:/s/ Melissa K. Caen
(Melissa K. Caen, Attorney-in-fact)
Date: February 19, 2020


Supplemental Information to be Furnished with Reports Filed Pursuant to Section 15(d) of the Act by Registrants Which Have Not Registered Securities Pursuant to Section 12 of the Act:

Southern Company Gas is not required to send an annual report or proxy statement to its sole shareholder and parent company, The Southern Company, and will not prepare such a report after filing this Annual Report on Form 10-K for fiscal year 2019. Accordingly, Southern Company Gas will not file an annual report with the Securities and Exchange Commission.