UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.  20549
FORM 10-Q
(Mark One)
QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended June 30, 20192020 or
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
Public Service Company of Colorado
(Exact name of registrant as specified in its charter)
Colorado001-0328084-0296600
(State or Other Jurisdiction of Incorporation or Organization)(Commission File Number)(IRS Employer Identification No.)
1800 Larimer, Suite 1100DenverCO80202
(Address of Principal Executive Offices)(Zip Code)
001-03280(303)84-0296600571-7511
(Commission File Number)Registrant’s Telephone Number, Including Area Code)(I.R.S. Employer Identification No.)
(Registrant, State of Incorporation or Organization, Address of Principal Executive Officers and Telephone Number)
Public Service Company of Colorado
Colorado
1800 Larimer, Suite 1100
DenverN/A
Colorado80202(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report)
303571-7511

Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading SymbolName of each exchange on which registered
N/AN/AN/A

Indicate by check mark whether the registrant (1) has 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 registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes No
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 andof Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes No
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company or an emerging growth company.  See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filerAccelerated filer
Non-accelerated filerSmaller reporting company
Emerging growth company
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
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.
ClassAugust 1, 2019July 31, 2020
Common Stock, $0.01 par value100 shares

Public Service Company of Colorado meets the conditions set forth in General Instruction H(1)(a) and (b) of Form 10-Q and is therefore filing this Form 10-Q with the reduced disclosure format specified in General Instruction H(2) to such Form 10-Q.






TABLE OF CONTENTS
PART IFINANCIAL INFORMATION
Item l —
Item 2 —
Item 4 —
PART IIOTHER INFORMATION
Item 1 —
Item 1A —
Item 6 —
Certifications Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
Certifications Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
This Form 10-Q is filed by Public Service Company of Colorado (PSCo). PSCo is a wholly owned subsidiary of Xcel Energy Inc. Additional information on Xcel Energy is available in various filings with the SEC.Securities and Exchange Commission (SEC). This report should be read in its entirety.




Definitions of Abbreviations
ABBREVIATIONS AND INDUSTRY TERMS
Xcel Energy Inc.’s Subsidiaries and Affiliates (current and former)
NSP-Minnesotae primee prime inc.
NSP-MinnesotaNorthern States Power Company, a Minnesota corporation
NSP-WisconsinNorthern States Power Company, a Wisconsin corporation
PSCoPublic Service Company of Colorado
SPSSouthwestern Public Service Company
Utility subsidiariesNSP-Minnesota, NSP-Wisconsin, PSCo and SPS
WYCOWYCO Development, LLC
Xcel EnergyXcel Energy Inc. and subsidiaries
Federal and State Regulatory Agencies
CPUCColorado Public Utilities Commission
EPAUnited States Environmental Protection Agency
IRSFERCFederal Energy Regulatory Commission
IRSInternal Revenue Service
SECSecurities and Exchange Commission
Electric, Purchased Gas and Resource Adjustment Clauses
TCADSMTransmission cost adjustmentDemand side management
Other
ACEAFUDCAffordable Clean Energy
AFUDCAllowance for funds used during construction
ASCFASB Accounting Standards Codification
ASUC&IFASB Accounting Standards Update
C&ICommercial and Industrial
CACJACCRClean Air Clean Jobs Act
CCRCoal combustion residual
CCR RuleFinal rule (40 CFR 257.50 - 257.107) published by the EPA regulating the management, storage and disposal of CCRs as a nonhazardous waste
CIGCEOColorado Interstate Gas Company, LLCChief executive officer
DRCCFODevelopment Recovery CompanyChief financial officer
ETRCOVID-19Novel coronavirus
ETREffective tax rate
FASBFinancial Accounting Standards Board
GAAPGenerally accepted accounting principles
IPPIndependent power producing entity
MGPMDLMulti district litigation
MGPManufactured gas plant
NOLNet operating loss
O&MOperating and maintenance
PPAPurchased powerPower purchase agreement
PTCProduction tax credit
ROEReturn on equity
ROURTORight-of-useRegional Transmission Organization
TCJAVIE2017 federal tax reform enacted as Public Law No: 115-97, commonly referred to as the Tax Cuts and Jobs ActVariable interest entity
Measurements
MWMegawatts
Measurements
MWMegawattsForward-Looking Statements
Forward-Looking Statements
Except for the historical statements contained in this report, the matters discussed herein are forward-looking statements that are subject to certain risks, uncertainties and assumptions. Such forward-looking statements, assumptions and other statements are intended to be identified in this document by the words “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “objective,” “outlook,” “plan,” “project,” “possible,” “potential,” “should,” “will,” “would” and similar expressions. Actual results may vary materially. Forward-looking statements speak only as of the date they are made and we expressly disclaim any obligation to update any forward-looking information. The following factors, in addition to those discussed elsewhere in this Quarterly Report on Form 10-Q and in other securities filings (including PSCo’s Annual Report on Form 10-K for the fiscal year ended Dec. 31, 20182019 and subsequent securities filings), could cause actual results to differ materially from management expectations as suggested by such forward-looking information: changes in environmental lawsuncertainty around the impacts and regulations; climate changeduration of the COVID-19 pandemic; operational safety; successful long-term operational planning; commodity risks associated with energy markets and other weather natural disasterproduction; rising energy prices and resource depletion, including compliance with any accompanying legislativefuel costs; qualified employee work force and regulatory changes;third-party contractor factors; ability to recover costs, from customers;changes in regulation; reductions in our credit ratings and the cost of maintaining certain contractual relationships; general economic conditions, including inflation rates, monetary fluctuations and their impact on capital expenditures and the ability of PSCo and its subsidiaries to obtain financing on favorable terms; availability or cost of capital; our customers’ and counterparties’ ability to pay their debts to us; assumptions and costs relating to funding our employee benefit plans and health care benefits; tax laws; operational safety; successful long-term operational planning; commodity risks associated with energy markets and production; rising energy prices; costs of potential regulatory penalties; effects of geopolitical events, including war and acts of terrorism; cyber security threats and data security breaches; fuel costs;seasonal weather patterns; changes in environmental laws and employee work forceregulations; climate change and third party contractor factors.other weather; natural disaster and resource depletion, including compliance with any accompanying legislative and regulatory changes; and costs of potential regulatory penalties.




Table of Contents
PART I — FINANCIAL INFORMATION
ItemITEM 1FINANCIAL STATEMENTS
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
(amounts in millions)
Three Months Ended June 30 Six Months Ended June 30 Three Months Ended June 30Six Months Ended June 30
2019 2018 2019 2018 2020201920202019
Operating revenues       Operating revenues  
Electric$692.7
 $716.2
 $1,434.2
 $1,414.5
Electric$715.4  $692.7  $1,427.2  $1,434.2  
Natural gas207.6
 186.7
 676.7
 550.6
Natural gas186.2  207.6  517.7  676.7  
Steam and other9.7
 9.0
 22.1
 20.1
Steam and other9.5  9.7  22.9  22.1  
Total operating revenues910.0
 911.9
 2,133.0
 1,985.2
Total operating revenues911.1  910.0  1,967.8  2,133.0  
       
Operating expenses 
  
    Operating expenses  
Electric fuel and purchased power240.7
 271.9
 544.9
 553.1
Electric fuel and purchased power258.4  240.7  529.2  544.9  
Cost of natural gas sold and transported69.9
 58.6
 342.4
 249.8
Cost of natural gas sold and transported49.8  69.9  187.4  342.4  
Cost of sales — steam and other3.9
 3.7
 8.4
 7.5
Cost of sales — steam and other3.0  3.9  6.0  8.4  
Operating and maintenance expenses200.3
 189.0
 399.5
 372.1
Operating and maintenance expenses189.3  200.3  393.8  399.5  
Demand side management expenses32.2
 33.2
 64.4
 65.9
Demand side management expenses36.1  32.2  71.7  64.4  
Depreciation and amortization148.1
 116.5
 295.0
 238.2
Depreciation and amortization158.1  148.1  314.5  295.0  
Taxes (other than income taxes)52.2
 49.7
 105.9
 102.4
Taxes (other than income taxes)55.4  52.2  108.6  105.9  
Total operating expenses747.3
 722.6
 1,760.5
 1,589.0
Total operating expenses750.1  747.3  1,611.2  1,760.5  
       
Operating income162.7
 189.3
 372.5
 396.2
Operating income161.0  162.7  356.6  372.5  
       
Other (expense) income, net(0.3) 0.8
 0.6
 1.0
Other income (expense), netOther income (expense), net1.6  (0.3) (0.2) 0.6  
Allowance for funds used during construction — equity5.0
 13.5
 9.1
 24.5
Allowance for funds used during construction — equity11.4  5.0  20.0  9.1  
       
Interest charges and financing costs 
  
    Interest charges and financing costs  
Interest charges — includes other financing costs of $1.6, $1.6, $3.2 and $3.2, respectively57.7
 51.2
 117.1
 101.2
Interest charges — includes other financing costs of $1.8, $1.6, $3.5 and $3.2, respectivelyInterest charges — includes other financing costs of $1.8, $1.6, $3.5 and $3.2, respectively62.9  57.7  123.0  117.1  
Allowance for funds used during construction — debt(2.4) (5.2) (4.9) (9.8)Allowance for funds used during construction — debt(4.7) (2.4) (8.5) (4.9) 
Total interest charges and financing costs55.3
 46.0
 112.2
 91.4
Total interest charges and financing costs58.2  55.3  114.5  112.2  
       
Income before income taxes112.1
 157.6
 270.0
 330.3
Income before income taxes115.8  112.1  261.9  270.0  
Income taxes10.6
 35.3
 29.7
 74.3
Income tax expenseIncome tax expense7.7  10.6  25.1  29.7  
Net income$101.5
 $122.3
 $240.3
 $256.0
Net income$108.1  $101.5  $236.8  $240.3  
See Notes to Consolidated Financial Statements

4

Table of Contents
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
(amounts in millions)
  Three Months Ended June 30 Six Months Ended June 30
  2019 2018 2019 2018
Net income $101.5
 $122.3
 $240.3
 $256.0
         
Other comprehensive income      
  
         
Derivative instruments:      
  
Reclassification of losses to net income, net of tax of $0.1, $0.1, $0.2 and $0.2, respectively 0.3
 0.3
 0.6
 0.6
         
Other comprehensive income 0.3
 0.3
 0.6
 0.6
Comprehensive income $101.8
 $122.6
 $240.9
 $256.6

 Three Months Ended June 30Six Months Ended June 30
 2020201920202019
Net income$108.1  $101.5  $236.8  $240.3  
Other comprehensive income  
Derivative instruments:  
Reclassification of loss to net income, net of tax of $0.1, $0.1, $0.2, and $0.2, respectively0.3  0.3  0.6  0.6  
Total other comprehensive income0.3  0.3  0.6  0.6  
Total comprehensive income$108.4  $101.8  $237.4  $240.9  
See Notes to Consolidated Financial Statements


5

Table of Contents
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
(amounts in millions)
 Six Months Ended June 30
 2019 2018
Operating activities   
Net income$240.3
 $256.0
Adjustments to reconcile net income to cash provided by operating activities: 
  
Depreciation and amortization297.4
 240.6
Deferred income taxes2.8
 25.6
Amortization of investment tax credits(1.3) (1.4)
Allowance for equity funds used during construction(9.1) (24.5)
Net realized and unrealized hedging and derivative transactions(2.2) (1.9)
Changes in operating assets and liabilities: 
  
Accounts receivable63.2
 22.0
Accrued unbilled revenues77.2
 66.5
Inventories16.5
 44.8
Prepayments and other0.5
 1.5
Accounts payable(111.8) (22.1)
Net regulatory assets and liabilities80.0
 30.4
Other current liabilities(94.6) (119.1)
Pension and other employee benefit obligations(43.5) (27.5)
Other, net0.5
 (10.7)
Net cash provided by operating activities515.9
 480.2
    
Investing activities 
  
Utility capital/construction expenditures(632.5) (801.0)
Investments in utility money pool arrangement(131.0) (198.0)
Repayments from utility money pool arrangement131.0
 56.0
Net cash used in investing activities(632.5) (943.0)
    
Financing activities 
  
Repayments of short-term borrowings, net(86.0) 
Borrowings under utility money pool arrangement58.0
 526.0
Repayments under utility money pool arrangement(8.0) (526.0)
Proceeds from issuance of long-term debt391.6
 692.7
Repayments of long-term debt(400.0) 
Capital contributions from parent332.2
 216.5
Dividends paid to parent(190.4) (171.5)
Other, net
 (0.1)
Net cash provided by financing activities97.4
 737.6
    
Net change in cash and cash equivalents(19.2) 274.8
Cash and cash equivalents at beginning of period33.4
 7.5
Cash and cash equivalents at end of period$14.2
 $282.3
    
Supplemental disclosure of cash flow information: 
  
Cash paid for interest (net of amounts capitalized)$(107.4) $(88.9)
Cash paid for income taxes, net(28.7) (96.4)
Supplemental disclosure of non-cash investing and financing transactions: 
  
Accrued property, plant and equipment additions$113.1
 $131.8
Inventory transfers to property, plant and equipment15.4
 9.3
Operating lease right-of-use assets653.4
 
Allowance for equity funds used during construction9.1
 24.5

 Six Months Ended June 30
 20202019
Operating activities  
Net income$236.8  $240.3  
Adjustments to reconcile net income to cash provided by operating activities:  
Depreciation and amortization316.7  297.4  
Deferred income taxes8.7  2.8  
Amortization of investment tax credits(1.2) (1.3) 
Allowance for equity funds used during construction(20.0) (9.1) 
Provision for bad debts10.8  6.8  
Net realized and unrealized hedging and derivative transactions(1.4) (2.2) 
Changes in operating assets and liabilities:  
Accounts receivable24.5  56.4  
Accrued unbilled revenues65.3  77.2  
Inventories20.4  16.5  
Prepayments and other6.6  0.5  
Accounts payable(83.4) (111.8) 
Net regulatory assets and liabilities41.0  80.0  
Other current liabilities(86.1) (94.6) 
Pension and other employee benefit obligations(46.7) (43.5) 
Other, net(8.0) 0.5  
Net cash provided by operating activities484.0  515.9  
Investing activities  
Utility capital/construction expenditures(917.6) (632.5) 
Investments in utility money pool arrangement(366.0) (131.0) 
Repayments from utility money pool arrangement366.0  131.0  
Net cash used in investing activities(917.6) (632.5) 
Financing activities  
Repayments of short-term borrowings, net—  (86.0) 
Borrowings under utility money pool arrangement1,311.0  58.0  
Repayments under utility money pool arrangement(1,350.0) (8.0) 
Proceeds from issuance of long-term debt735.2  391.6  
Repayments of long-term debt—  (400.0) 
Capital contributions from parent778.4  332.2  
Dividends paid to parent(574.1) (190.4) 
Other, net(0.3) —  
Net cash provided by financing activities900.2  97.4  
Net change in cash, cash equivalents and restricted cash466.6  (19.2) 
Cash, cash equivalents and restricted cash at beginning of period11.4  33.4  
Cash, cash equivalents and restricted cash at end of period$478.0  $14.2  
Supplemental disclosure of cash flow information:  
Cash paid for interest (net of amounts capitalized)$(106.9) $(107.4) 
Cash paid for income taxes, net(17.5) (28.7) 
Supplemental disclosure of non-cash investing and financing transactions:  
Accrued property, plant and equipment additions$113.2  $113.1  
Inventory transfers to property, plant and equipment17.4  15.4  
Operating lease right-of-use assets8.2  653.4  
Allowance for equity funds used during construction20.0  9.1  
See Notes to Consolidated Financial Statements

6

Table of Contents
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS (UNAUDITED)
(amounts in millions, except share and per share data)
 June 30, 2019 Dec. 31, 2018
Assets   
Current assets   
Cash and cash equivalents$14.2
 $33.4
Accounts receivable, net252.6
 310.3
Accounts receivable from affiliates21.2
 80.8
Accrued unbilled revenues236.3
 313.5
Inventories165.5
 197.4
Regulatory assets68.4
 120.6
Derivative instruments18.4
 42.6
Prepayments and other26.4
 23.8
Total current assets803.0
 1,122.4
    
Property, plant and equipment, net15,335.7
 15,120.0
    
Other assets 
  
Regulatory assets1,052.3
 1,010.7
Derivative instruments2.5
 1.2
Operating lease right-of-use assets613.7
 
Other175.1
 37.2
Total other assets1,843.6
 1,049.1
Total assets$17,982.3
 $17,291.5
    
Liabilities and Equity 
  
Current liabilities 
  
Current portion of long-term debt$
 $406.2
Short-term debt221.0
 307.0
Borrowings under utility money pool arrangement50.0
 
Accounts payable383.5
 503.4
Accounts payable to affiliates43.6
 46.0
Regulatory liabilities116.9
 67.3
Taxes accrued118.5
 202.0
Accrued interest46.4
 43.2
Dividends payable to parent104.9
 91.5
Derivative instruments9.7
 34.6
Other182.5
 101.5
Total current liabilities1,277.0
 1,802.7
    
Deferred credits and other liabilities 
  
Deferred income taxes1,738.6
 1,719.3
Deferred investment tax credits24.1
 25.3
Regulatory liabilities2,023.4
 2,021.5
Asset retirement obligations346.2
 338.7
Derivative instruments0.6
 0.6
Customer advances169.1
 168.1
Pension and employee benefit obligations231.3
 275.3
Operating lease liabilities560.3
 
Other152.5
 50.4
Total deferred credits and other liabilities5,246.1
 4,599.2
    
Commitments and contingencies

 

Capitalization 
  
Long-term debt4,846.1
 4,591.4
Common stock — 100 shares authorized at $0.01 par value; 100 shares
outstanding at June 30, 2019 and Dec. 31, 2018, respectively

 
Additional paid in capital4,618.3
 4,340.5
Retained earnings2,019.7
 1,983.2
Accumulated other comprehensive loss(24.9) (25.5)
Total common stockholder’s equity6,613.1
 6,298.2
Total liabilities and equity$17,982.3
 $17,291.5

 June 30, 2020Dec. 31, 2019
Assets  
Current assets  
Cash and cash equivalents$478.0  $11.4  
Accounts receivable, net284.3  303.9  
Accounts receivable from affiliates13.0  52.7  
Accrued unbilled revenues227.7  293.9  
Inventories154.1  192.0  
Regulatory assets87.2  64.0  
Derivative instruments8.0  7.2  
Prepayments and other57.1  55.9  
Total current assets1,309.4  981.0  
Property, plant and equipment, net16,927.8  16,155.0  
Other assets  
Regulatory assets1,045.5  1,038.1  
Derivative instruments0.4  —  
Operating lease right-of-use assets541.0  574.0  
Other257.1  259.4  
Total other assets1,844.0  1,871.5  
Total assets$20,081.2  $19,007.5  
Liabilities and Equity  
Current liabilities  
Current portion of long-term debt$400.0  $400.0  
Borrowings under utility money pool arrangement—  39.0  
Accounts payable354.6  573.3  
Accounts payable to affiliates63.8  43.9  
Regulatory liabilities103.7  69.2  
Taxes accrued123.3  202.1  
Accrued interest55.8  53.4  
Dividends payable to parent104.6  111.5  
Derivative instruments13.2  8.7  
Operating lease liabilities91.8  85.8  
Other85.9  98.8  
Total current liabilities1,396.7  1,685.7  
Deferred credits and other liabilities  
Deferred income taxes1,880.1  1,850.8  
Deferred investment tax credits21.6  22.8  
Regulatory liabilities2,299.0  2,036.8  
Asset retirement obligations329.5  324.0  
Derivative instruments47.6  52.5  
Customer advances170.6  173.6  
Pension and employee benefit obligations164.5  211.9  
Operating lease liabilities477.2  517.6  
Other152.3  150.9  
Total deferred credits and other liabilities5,542.4  5,340.9  
Commitments and contingencies
Capitalization  
Long-term debt5,722.0  4,984.7  
Common stock — 100 shares authorized at $0.01 par value; 100 shares
outstanding at June 30, 2020 and Dec. 31, 2019, respectively
—  —  
Additional paid in capital5,693.7  4,939.4  
Retained earnings1,752.4  2,083.4  
Accumulated other comprehensive loss(26.0) (26.6) 
Total common stockholder’s equity7,420.1  6,996.2  
Total liabilities and equity$20,081.2  $19,007.5  
See Notes to Consolidated Financial Statements

7

Table of Contents
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER’S EQUITY (UNAUDITED)
(amounts in millions, except share data)
Common Stock IssuedRetained EarningsAccumulated
Other
Comprehensive
Loss
Total
Common
Stockholder’s
Equity
SharesPar ValueAdditional Paid In Capital
Three Months Ended June 30, 2020 and 2019
Balance at March 31, 2019100  $—  $4,390.5  $2,023.1  $(25.2) $6,388.4  
Net income101.5  101.5  
Other comprehensive income0.3  0.3  
Dividends declared to parent(104.9) (104.9) 
Contribution of capital by parent227.8  227.8  
Balance at June 30, 2019100  $—  $4,618.3  $2,019.7  $(24.9) $6,613.1  
Balance at March 31, 2020100  $—  $4,989.4  $2,108.9  $(26.3) $7,072.0  
Net income108.1  108.1  
Other comprehensive income0.3  0.3  
Dividends declared to parent(464.6) (464.6) 
Contribution of capital by parent704.3  704.3  
Balance at June 30, 2020100  $—  $5,693.7  $1,752.4  $(26.0) $7,420.1  
Common Stock IssuedRetained EarningsAccumulated
Other
Comprehensive
Loss
Total
Common
Stockholder’s
Equity
SharesPar ValueAdditional Paid In Capital
Six Months Ended June 30, 2020 and 2019
Balance at Dec. 31, 2018100  $—  $4,340.5  $1,983.2  $(25.5) $6,298.2  
Net income240.3  240.3  
Other comprehensive income0.6  0.6  
Dividends declared to parent(203.8) (203.8) 
Contribution of capital by parent277.8  277.8  
Balance at June 30, 2019100  $—  $4,618.3  $2,019.7  $(24.9) $6,613.1  
Balance at Dec. 31, 2019100  $—  $4,939.4  $2,083.4  $(26.6) $6,996.2  
Net income236.8  236.8  
Other comprehensive income0.6  0.6  
Dividends declared to parent(567.1) (567.1) 
Contribution of capital by parent754.3  754.3  
Adoption of ASC Topic 326(0.7) (0.7) 
Balance at June 30, 2020100  $—  $5,693.7  $1,752.4  $(26.0) $7,420.1  
See Notes to Consolidated Financial Statements
 Common Stock Issued Retained Earnings Accumulated
Other
Comprehensive
Loss
 Total
Common
Stockholder’s
Equity
 Shares Par Value Additional Paid In Capital   
Three Months Ended June 30, 2019 and 2018          
Balance at March 31, 2018100
 $
 $4,032.8
 $1,860.6
 $(26.4) $5,867.0
Net income      122.3
   122.3
Other comprehensive income        0.3
 0.3
Dividends declared to parent      (100.3)   (100.3)
Contribution of capital by parent    240.3
     240.3
Balance at June 30, 2018100
 $
 $4,273.1
 $1,882.6
 $(26.1) $6,129.6
            
Balance at March 31, 2019100
 $
 $4,390.5
 $2,023.1
 $(25.2) $6,388.4
Net income      101.5
   101.5
Other comprehensive income        0.3
 0.3
Dividends declared to parent      (104.9)   (104.9)
Contribution of capital by parent    227.8
     227.8
Balance at June 30, 2019100
 $
 $4,618.3
 $2,019.7
 $(24.9) $6,613.1
            
See Notes to Consolidated Financial Statements



PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER’S EQUITY (UNAUDITED)
(amounts in millions, except share data)

 Common Stock Issued Retained Earnings Accumulated
Other
Comprehensive
Loss
 Total
Common
Stockholder’s
Equity
 Shares Par Value Additional Paid In Capital   
Six Months Ended June 30, 2019 and 2018          
Balance at Dec. 31, 2017100
 $
 $4,032.8
 $1,822.2
 $(26.7) $5,828.3
Net income      256.0
   256.0
Other comprehensive income        0.6
 0.6
Dividends declared to parent      (195.6)   (195.6)
Contribution of capital by parent    240.3
     240.3
Balance at June 30, 2018100
 $
 $4,273.1
 $1,882.6
 $(26.1) $6,129.6
            
Balance at Dec. 31, 2018100
 $
 $4,340.5
 $1,983.2
 $(25.5) $6,298.2
Net income      240.3
   240.3
Other comprehensive income        0.6
 0.6
Dividends declared to parent      (203.8)   (203.8)
Contribution of capital by parent    277.8
     277.8
Balance at June 30, 2019100
 $
 $4,618.3
 $2,019.7
 $(24.9) $6,613.1
            
See Notes to Consolidated Financial Statements


8

Table of Contents
PUBLIC SERVICE CO. OF COLORADO AND SUBSIDIARIES
Notes to Consolidated Financial Statements (UNAUDITED)
In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments necessary to present fairly, in accordance with U.S. GAAP, the financial position of PSCo and its subsidiaries as of June 30, 20192020 and Dec. 31, 2018;2019; the results of its operations, including the components of net income, and comprehensive income and changes in stockholders’stockholder’s equity for the three and six months ended June 30, 20192020 and 2018;2019; and its cash flows for the six months ended June 30, 20192020 and 2018.2019. All adjustments are of a normal, recurring nature, except as otherwise disclosed. Management has also evaluated the impact of events occurring after June 30, 20192020, up to the date of issuance of these consolidated financial statements. These statements contain all necessary adjustments and disclosures resulting from that evaluation. The Dec. 31, 20182019, balance sheet information has been derived from the audited 20182019 consolidated financial statements included in the PSCo Annual Report on Form 10-K for the year ended Dec. 31, 2018.2019. These notes to the consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC for Quarterly Reports on Form 10-Q. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP on an annual basis have been condensed or omitted pursuant to such rules and regulations. For further information, refer to the consolidated financial statements and notes thereto, included in the PSCo Annual Report on Form 10-K for the year ended Dec. 31, 2018,2019, filed with the SEC on Feb. 22, 2019.21, 2020. Due to the seasonality of PSCo’s electric and natural gas sales, interim results are not necessarily an appropriate base from which to project annual results.
1.Summary of Significant Accounting Policies
The significant accounting policies set forth in Note 1 to the consolidated financial statements in the PSCo Annual Report on Form 10-K for the year ended Dec. 31, 2018,2019, appropriately represent, in all material respects, the current status of accounting policies and are incorporated herein by reference.
2.Accounting Pronouncements
Recently Issued
Credit Losses In 2016, the FASB issued Financial Instruments - Credit Losses, Topic 326 (ASC Topic 326), which changes how entities account for losses on receivables and certain other assets. The guidance requires use of a current expected credit loss model, which may result in earlier recognition of credit losses than under previous accounting standards. ASC Topic 326 is effective for interim and annual periods beginning on or after Dec. 15, 2019, and will be applied on a modified-retrospective approach through a cumulative-effect adjustment to retained earnings as of Jan. 1, 2020. PSCo is currently evaluating the impact of adoption of the new standard on its consolidated financial statements.
Recently Adopted
LeasesCredit Losses In 2016, the FASB issued LeasesFinancial Instruments - Credit Losses, Topic 326 (ASC Topic 326), Topic 842(ASC Topic 842), which provides newchanges how entities account for losses on receivables and certain other assets. The guidance requires use of a current expected credit loss model, which may result in earlier recognition of credit losses than under previous accounting and disclosure guidance for leasing activities, most significantly requiring that operating leases be recognized on the balance sheet. standards.
PSCo adoptedimplemented the guidance using a modified-retrospective approach, recognizing a cumulative effect charge of $0.7 million (after tax) to retained earnings on Jan. 1, 2019 utilizing the package of transition practical expedients provided by the new standard, including carrying forward prior conclusions on whether agreements existing before the adoption date contain leases and whether existing leases are operating or finance leases; ASC Topic 842 refers to capital leases as finance leases.
Specifically for land easement contracts, PSCo has elected the practical expedient provided by ASU No. 2018-01 Leases: Land Easement Practical Expedient for Transition to Topic 842, and as a result, only those easement contracts entered on or after Jan. 1, 2019 will be evaluated to determine if lease treatment is appropriate.
PSCo also utilized the transition practical expedient offered by ASU No. 2018-11 Leases: Targeted Improvements to implement the standard on a prospective basis. As a result, reporting periods in the consolidated financial statements beginning Jan. 1, 2019 reflect the implementation of ASC Topic 842, while prior periods continue to be reported in accordance with Leases, Topic 840 (ASC Topic 840).2020. Other than first-time recognition of operating leasesan allowance for doubtful accounts on its consolidated balance sheet,accrued unbilled revenues, the implementationJan. 1, 2020, adoption of ASC Topic 842326 did not have a significant impact on PSCo’s consolidated financial statements. Adoption resulted in recognition of approximately $0.7 billion of operating lease ROU assets and current/noncurrent operating lease liabilities. See Note 9 for leasing disclosures.
3.Selected Balance Sheet Data
(Millions of Dollars)June 30, 2020Dec. 31, 2019
Accounts receivable, net
Accounts receivable$308.2  $324.9  
Less allowance for bad debts(23.9) (21.0) 
Accounts receivable, net$284.3  $303.9  
(Millions of Dollars) June 30, 2019 Dec. 31, 2018
Accounts receivable, net    
Accounts receivable $272.3
 $330.8
Less allowance for bad debts (19.7) (20.5)
  $252.6
 $310.3
(Millions of Dollars)June 30, 2020Dec. 31, 2019
Inventories
Materials and supplies$62.8  $62.6  
Fuel67.2  77.1  
Natural gas24.1  52.3  
Total inventories$154.1  $192.0  
(Millions of Dollars)June 30, 2020Dec. 31, 2019
Property, plant and equipment, net
Electric plant$14,601.5  $14,361.9  
Natural gas plant4,778.1  4,631.4  
Common and other property1,133.3  1,113.5  
Plant to be retired (a)
291.5  259.9  
Construction work in progress1,251.8  912.7  
Total property, plant and equipment22,056.2  21,279.4  
Less accumulated depreciation(5,128.4) (5,124.4) 
Property, plant and equipment, net$16,927.8  $16,155.0  
(a)
In 2018, the CPUC approved early retirement of PSCo’s Comanche Units 1 and 2 in approximately 2022 and 2025, respectively. PSCo also expects Craig Unit 1 to be retired early in 2025. Amounts are presented net of accumulated depreciation.
(Millions of Dollars) June 30, 2019 Dec. 31, 2018
Inventories    
Materials and supplies $61.8
 $61.9
Fuel 71.7
 69.5
Natural gas 32.0
 66.0
  $165.5
 $197.4

(Millions of Dollars) June 30, 2019 Dec. 31, 2018
Property, plant and equipment, net    
Electric plant $13,922.3
 $13,604.5
Natural gas plant 4,443.0
 4,387.6
Common and other property 1,052.3
 1,023.7
Plant to be retired (a)
 290.2
 321.9
Construction work in progress 638.9
 573.3
Total property, plant and equipment 20,346.7
 19,911.0
Less accumulated depreciation (5,011.0) (4,791.0)
  $15,335.7
 $15,120.0

(a)
In 2018, the CPUC approved early retirement of PSCo’s Comanche Units 1 and 2 in approximately 2022 and 2025, respectively. PSCo also expects Craig Unit 1 to be retired early in 2025. Amounts are presented net of accumulated depreciation.

4.Borrowings and Other Financing Instruments
Short-Term Borrowings
PSCo meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings under its credit facility and the money pool.
Money Pool Xcel Energy Inc. and its utility subsidiaries have established a money pool arrangement that allows for short-term investments in and borrowings between the utility subsidiaries. Xcel Energy Inc. may make investments in the utility subsidiaries at market-based interest rates; however, the money pool arrangement does not allow the utility subsidiaries to make investments in Xcel Energy Inc.
Money pool borrowings for PSCo were as follows:
(Amounts in Millions, Except Interest Rates) Three Months Ended June 30, 2019 Year Ended Dec. 31, 2018
Borrowing limit $250
 $250
Amount outstanding at period end 50
 
Average amount outstanding 3
 25
Maximum amount outstanding 50
 156
Weighted average interest rate, computed on a daily basis 2.41% 1.93%
Weighted average interest rate at period end 2.41
 N/A

(Amounts in Millions, Except Interest Rates)Three Months Ended June 30, 2020Year Ended Dec. 31, 2019
Borrowing limit$250  $250  
Amount outstanding at period end—  39  
Average amount outstanding94   
Maximum amount outstanding250  50  
Weighted average interest rate, computed on a daily basis0.92 %2.29 %
Weighted average interest rate at period endN/A1.63 %
Commercial Paper — Commercial paper outstanding for PSCo was as follows:
(Amounts in Millions, Except Interest Rates)Three Months Ended June 30, 2020Year Ended Dec. 31, 2019
Borrowing limit$700  $700  
Amount outstanding at period end—  —  
Average amount outstanding24  154  
Maximum amount outstanding166  432  
Weighted average interest rate, computed on a daily basis0.71 %2.67 %
Weighted average interest rate at period endN/AN/A
(Amounts in Millions, Except Interest Rates) Three Months Ended June 30, 2019 Year Ended Dec. 31, 2018
Borrowing limit $700
 $700
Amount outstanding at period end 221
 307
Average amount outstanding 244
 55
Maximum amount outstanding 432
 309
Weighted average interest rate, computed on a daily basis 2.65% 2.28%
Weighted average interest rate at period end 2.59
 2.95
9


Table of Contents
Letters of Credit — PSCo uses letters of credit, generally with terms of one year, to provide financial guarantees for certain operating obligations. There were $10$8 million and $9 million of letters of credit outstanding under the credit facility at June 30, 20192020 and Dec. 31, 2018.2019, respectively. The contract amounts of these letters of credit approximate their fair value and are subject to fees.
Revolving Credit Facility — In order to use its commercial paper program to fulfill short-term funding needs, PSCo must have a revolving credit facility in place at least equal to the amount of its commercial paper borrowing limit and cannot issue commercial paper in an aggregate amount exceeding available capacity under this credit facility. The credit facility provides short-term financing in the form of notes payable to banks, letters of credit and back-up support for commercial paper borrowings.
PSCo has the right to request an extension of the revolving credit facility termination date for 2 additional one-year periods. All extension requests are subject to majority bank group approval.
At June 30, 2019,2020, PSCo had the following committed revolving credit facility available (in millions of dollars):
Credit Facility (a)
Outstanding (b)
Available
$700  $ $692  
Credit Facility (a)
 
Outstanding (b)
 Available
$700
 $231
 $469
(a) This credit facility expires in June 2024.
(b) Includes outstanding commercial paper and letters of credit.
All credit facility bank borrowings, outstanding letters of credit and outstanding commercial paper reduce the available capacity under the credit facility. PSCo had no0 direct advances on the credit facility outstanding at June 30, 20192020 and Dec. 31, 2018.2019.
Long-Term Borrowings
During the six months ended June 30, 2019,2020, PSCo issued $400$375 million of 4.05%in 1.90% first mortgage bonds due Sep.Jan. 15, 2049.2031 and $375 million of 2.70% first mortgage bonds due Jan. 15, 2051.
5.Revenues
Revenue is classified by the type of goods/services rendered and market/customer type. PSCo’s operating revenues consists of the following:
Three Months Ended June 30, 2020
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$243.8  $117.7  $2.8  $364.3  
C&I351.5  39.1  5.6  396.2  
Other11.7  —  —  11.7  
Total retail607.0  156.8  8.4  772.2  
Wholesale41.5  —  —  41.5  
Transmission13.8  —  —  13.8  
Other14.5  23.4  —  37.9  
Total revenue from contracts with customers676.8  180.2  8.4  865.4  
Alternative revenue and other38.6  6.0  1.1  45.7  
Total revenues$715.4  $186.2  $9.5  $911.1  
  Three Months Ended June 30, 2019
(Millions of Dollars) Electric Natural Gas All Other Total
Major revenue types        
Revenue from contracts with customers:        
Residential $211.5
 $130.1
 $2.8
 $344.4
C&I 384.4
 49.4
 5.7
 439.5
Other 11.8
 
 
 11.8
Total retail 607.7
 179.5
 8.5
 795.7
Wholesale 29.1
 
 
 29.1
Transmission 11.6
 
 
 11.6
Other 6.5
 23.3
 
 29.8
Total revenue from contracts with customers 654.9
 202.8
 8.5
 866.2
Alternative revenue and other 37.8
 4.8
 1.2
 43.8
Total revenues $692.7
 $207.6
 $9.7
 $910.0
  Three Months Ended June 30, 2018
(Millions of Dollars) Electric Natural Gas All Other Total
Major revenue types        
Revenue from contracts with customers:        
Residential $222.7
 $104.0
 $2.6
 $329.3
C&I 383.7
 38.9
 5.3
 427.9
Other 11.4
 
 
 11.4
Total retail 617.8
 142.9
 7.9
 768.6
Wholesale 36.2
 
 
 36.2
Transmission 13.2
 
 
 13.2
Other 14.7
 18.8
 
 33.5
Total revenue from contracts with customers 681.9
 161.7
 7.9
 851.5
Alternative revenue and other 34.3
 25.0
 1.1
 60.4
Total revenues $716.2
 $186.7
 $9.0
 $911.9
Three Months Ended June 30, 2019
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$211.5  $130.1  $2.8  $344.4  
C&I384.4  49.4  5.7  439.5  
Other11.8  —  —  11.8  
Total retail607.7  179.5  8.5  795.7  
Wholesale29.1  —  —  29.1  
Transmission11.6  —  —  11.6  
Other6.5  23.3  —  29.8  
Total revenue from contracts with customers654.9  202.8  8.5  866.2  
Alternative revenue and other37.8  4.8  1.2  43.8  
Total revenues$692.7  $207.6  $9.7  $910.0  
Six Months Ended June 30, 2020
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$481.3  $335.1  $5.9  $822.3  
C&I703.5  116.9  14.8  835.2  
Other23.9  —  —  23.9  
Total retail1,208.7  452.0  20.7  1,681.4  
Wholesale88.8  —  —  88.8  
Transmission27.2  —  —  27.2  
Other29.3  53.2  —  82.5  
Total revenue from contracts with customers1,354.0  505.2  20.7  1,879.9  
Alternative revenue and other73.2  12.5  2.2  87.9  
Total revenues$1,427.2  $517.7  $22.9  $1,967.8  
Six Months Ended June 30, 2019
(Millions of Dollars)ElectricNatural GasAll OtherTotal
Major revenue types
Revenue from contracts with customers:
Residential$456.6  $441.5  $5.3  $903.4  
C&I752.3  169.7  14.5  936.5  
Other24.3  —  —  24.3  
Total retail1,233.2  611.2  19.8  1,864.2  
Wholesale86.4  —  —  86.4  
Transmission25.0  —  —  25.0  
Other18.1  54.9  —  73.0  
Total revenue from contracts with customers1,362.7  666.1  19.8  2,048.6  
Alternative revenue and other71.5  10.6  2.3  84.4  
Total revenues$1,434.2  $676.7  $22.1  $2,133.0  

  Six Months Ended June 30, 2019
(Millions of Dollars) Electric Natural Gas All Other Total
Major revenue types        
Revenue from contracts with customers:        
Residential $456.6
 $441.5
 $5.3
 $903.4
C&I 752.3
 169.7
 14.5
 936.5
Other 24.3
 
 
 24.3
Total retail 1,233.2
 611.2
 19.8
 1,864.2
Wholesale 86.4
 
 
 86.4
Transmission 25.0
 
 
 25.0
Other 18.1
 54.9
 
 73.0
Total revenue from contracts with customers 1,362.7
 666.1
 19.8
 2,048.6
Alternative revenue and other 71.5
 10.6
 2.3
 84.4
Total revenues $1,434.2
 $676.7
 $22.1
 $2,133.0
  Six Months Ended June 30, 2018
(Millions of Dollars) Electric Natural Gas All Other Total
Major revenue types        
Revenue from contracts with customers:        
Residential $450.3
 $331.8
 $5.2
 $787.3
C&I 727.0
 124.9
 12.5
 864.4
Other 23.6
 
 0.1
 23.7
Total retail 1,200.9
 456.7
 17.8
 1,675.4
Wholesale 84.1
 
 
 84.1
Transmission 25.4
 
 
 25.4
Other 33.5
 43.8
 
 77.3
Total revenue from contracts with customers 1,343.9
 500.5
 17.8
 1,862.2
Alternative revenue and other 70.6
 50.1
 2.3
 123.0
Total revenues $1,414.5
 $550.6
 $20.1
 $1,985.2



10

Table of Contents
6.Income Taxes
Except to the extent noted below, Note 87 to the consolidated financial statements included in PSCo’s Annual Report on Form 10-K for the year ended Dec. 31, 20182019, represents, in all material respects, the current status of other income tax matters except to the extent noted below and are incorporated herein by reference.
The following table reconciles the difference between the statutory rate and the ETR:
Six Months Ended June 30
20202019
Federal statutory rate21.0 %21.0 %
State tax (net of federal tax effect)3.7  3.7  
(Decreases) increases in tax from:
Wind PTCs(9.8) (9.4) 
Plant regulatory differences (a)
(4.7) (3.4) 
Other tax credits, net of NOL & tax credit allowances(1.1) (1.0) 
Other (net)0.5  0.1  
Effective income tax rate9.6 %11.0 %
  Six Months Ended June 30
  2019 2018
Federal statutory rate 21.0 % 21.0 %
State tax (net of federal tax effect) 3.7
 3.7
Increases (decreases) in tax from: 
 
Wind PTCs (9.4) 
Plant regulatory differences (a)
 (3.4) (1.5)
Other tax credits and allowances (net) (1.0) (1.0)
Other (net) 0.1
 0.3
Effective income tax rate 11.0 % 22.5 %
(a)
Regulatory differences for income tax primarily relate to the credit of excess deferred taxes to customers through the average rate assumption method. Income tax benefits associated with the credit of excess deferred credits are offset by corresponding revenue reductions.
(a)
Regulatory differences for income tax primarily relate to the flow back of excess deferred taxes to customers through the average rate assumption method and the impact of AFUDC - Equity. Year-to-date variations primarily relates to the deferral of the flow back of excess deferred taxes in 2018, as a result of pending regulatory decisions. Treatment of most tax reform items was established prior to the first quarter of 2019, resulting in a reduction in deferred amounts. Income tax benefits associated with the flow back of excess deferred credits are offset by corresponding revenue reductions and additional prepaid pension asset amortization.
Federal Audits  PSCO is a member of the Xcel Energy affiliated group that files a consolidated federal income tax return. Statute of limitations applicable to Xcel Energy’s federal income tax returns expire as follows:
Tax Year(s)YearsExpiration
2009 - 2013JuneSeptember 2020
2014 - 2016September 2020
2017SeptemberJune 2021

In 2015, the IRS commenced an examination of tax years 2012 and 2013. In 2017, the IRS concluded the audit of tax years 2012 and 2013 and proposed an adjustment that would impact Xcel Energy’s NOL and ETR. Xcel Energy filed a protest with the IRS. As of June 30, 2019, the case has been forwarded to Office of Appeals andIn April 2020, Xcel Energy has recognized its best estimate of income tax expense that will result from a final resolution of this issue; however, the outcome and timing of a resolution is unknown.Appeals reached an agreement and no material adjustments were required.
In 2018, the IRS began an audit of tax years 2014 - 2016. As of June 30, 2019 no2020, 0 adjustments have been proposed.
State Audits — PSCo is a member of the Xcel Energy affiliated group that files consolidated state income tax returns. As of June 30, 2019,2020, PSCo’s earliest open tax year that is subject to examination by state taxing authorities under applicable statutes of limitations is 2009. There are currently no state income tax audits in progress.
Unrecognized Benefits — Unrecognized tax benefit balance includes permanent tax positions, which if recognized would affect the annual ETR. In addition, the unrecognized tax benefit balance includes temporary tax positions for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility. A change in the period of deductibility would not affect the ETR but would accelerate the payment to the taxing authority to an earlier period.
Unrecognized tax benefits - permanent vs temporary:
(Millions of Dollars) June 30, 2019 Dec. 31, 2018
Unrecognized tax benefit — Permanent tax positions $6.0
 $5.4
Unrecognized tax benefit — Temporary tax positions 4.7
 4.9
Total unrecognized tax benefit $10.7
 $10.3

(Millions of Dollars)June 30, 2020Dec. 31, 2019
Unrecognized tax benefit — Permanent tax positions$8.0  $7.4  
Unrecognized tax benefit — Temporary tax positions4.5  4.6  
Total unrecognized tax benefit$12.5  $12.0  

Unrecognized tax benefits were reduced by tax benefits associated with NOL and tax credit carryforwards:
(Millions of Dollars) June 30, 2019 Dec. 31, 2018
NOL and tax credit carryforwards $(6.1) $(5.6)

(Millions of Dollars)June 30, 2020Dec. 31, 2019
NOL and tax credit carryforwards$(8.1) $(8.3) 
Net deferred tax liability associated with the unrecognized tax benefit amounts and related NOLs and tax credits carryforwards were $2.6$5.7 million and $2.0$5.0 million for June 30, 20192020 and Dec. 31, 2018,2019, respectively.
As the IRS Appealsaudit progresses and federal audit progress,state audits resume, it is reasonably possible that the amount of unrecognized tax benefit could decrease up to approximately $8.7$7.6 million in the next 12 months.
PayablesPayable for interest related to unrecognized tax benefits were not materialis partially offset by the interest benefit associated with NOL and notax credit carryforwards.
Interest payable related to unrecognized tax benefits:
(Millions of Dollars)June 30, 2020Dec. 31, 2019
Payable for interest related to unrecognized tax benefits at beginning of period$(1.1) $(0.7) 
Interest expense related to unrecognized tax benefits(0.9) (0.4) 
Payable for interest related to unrecognized tax benefits at end of period$(2.0) $(1.1) 
NaN amounts were accrued for penalties related to unrecognized tax benefits as of June 30, 2019 or2020 and Dec. 31, 2018.2019.
7.Fair Value of Financial Assets and Liabilities
Fair Value Measurements
The accountingAccounting guidance for fair value measurements and disclosures provides a single definition of fair value hierarchical framework for measuring assets and liabilities and requires disclosuredisclosures about assets and liabilities measured at fair value. A hierarchical framework for disclosing the observability of the inputs utilized in measuring assets and liabilities at fair value is established by this guidance.
Level 1 Quoted prices are available in active markets for identical assets or liabilities as of the reporting date. The types of assets and liabilities included in Level 1 are highly liquid and actively traded instruments with quoted prices.prices;
Level 2 Pricing inputs are other than quoted prices in active markets, but are either directly or indirectly observable as of the reporting date. The types of assets and liabilities included in Level 2 are typically either comparable to actively traded securities or contracts, or priced with models using highly observable inputs.inputs; and
Level 3 Significant inputs to pricing have little or no observability as of the reporting date. The types of assets and liabilities included in Level 3 are those valued with models requiring significant management judgment or estimation.
Specific valuation methods include:
Cash equivalents — The fair values of cash equivalents are generally based on cost plus accrued interest; money market funds are measured using quoted net asset value.
Interest rate derivatives — The fair values of interest rate derivatives are based on broker quotes that utilize current market interest rate forecasts.



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Commodity derivatives — The methods used to measure the fair value of commodity derivative forwards and options generally utilize observable forward prices and volatilities, as well as observable pricing adjustments for specific delivery locations and are generally assigned a Level 2 classification. When contractual settlements relate to inactive delivery locations for which pricing is relatively unobservable, or extend to periods beyond those readily observable on active exchanges or quoted by brokers, the significance of the use of less observable inputsforecasts of forward prices and volatilities on a valuation is evaluated and may result in Level 3 classification.
Derivative Instruments Fair Value Measurements
PSCo enters into derivative instruments, including forward contracts, futures, swaps and options, for trading purposes and to manage risk in connection with changes in interest rates, utility commodity prices and vehicle fuel prices.
Interest Rate Derivatives — PSCo enters into various instruments that effectively fix the yield or price on a specified benchmark interest rate for an anticipated debt issuance for a specific period. These derivative instruments are generally designated as cash flow hedges for accounting purposes.purposes, with changes in fair value prior to settlement recorded as other comprehensive income.
At June 30, 2019,2020, accumulated other comprehensive loss related to settled interest rate derivatives included $1.2 million of net losses expected to be reclassified into earnings during the next 12 months as the related hedged interest rate transactions impact earnings, including forecasted amounts for unsettled hedges, as applicable.
Wholesale and Commodity Trading Risk — PSCo conducts various wholesale and commodity trading activities, including the purchase and sale of electric capacity, energy, energy-related instruments and natural gas-related instruments, including derivatives. PSCo is allowed to conduct these activities within guidelines and limitations as approved by its risk management committee, comprised of management personnel not directly involved in activities governed by this policy.
Commodity Derivatives — PSCo enters into derivative instruments to manage variability of future cash flows from changes in commodity prices in its electric and natural gas operations, as well as for trading purposes. This could include the purchase or sale of energy or energy-related products, natural gas to generate electric energy, natural gas for resale and vehicle fuel.
PSCo may enterenters into derivative instruments that mitigate commodity price risk on behalf of electric and natural gas customers but may not be designated as qualifying hedging transactions. Changes in the fair value of non-trading commodity derivative instruments are recorded as other comprehensive income or deferred as a regulatory asset or liability. The classification as a regulatory asset or liability is based on commission approved regulatory recovery mechanisms.
As of June 30, 2019,2020, PSCo had no0 commodity contracts designated as cash flow hedges.
PSCo also enters into commodity derivative instruments for trading purposes not directly related to commodity price risks associated with serving its electric and natural gas customers. Changes in the fair value of these commodity derivatives are recorded in electric operating revenues, net of amounts credited to customers under margin-sharing mechanisms.




Gross notional amounts of commodity forwards and options:
(Amounts in Millions) (a)(b)
June 30, 2020Dec. 31, 2019
Megawatt hours of electricity19.3  9.3  
Million British thermal units of natural gas69.2  32.2  
(Amounts in Millions) (a)(b)
 June 30, 2019 Dec. 31, 2018
Megawatt hours of electricity 16.3
 24.4
Million British thermal units of natural gas 51.3
 48.4
(a)Amounts are not reflective of net positions in the underlying commodities.
(a)
(b)Notional amounts for options are included on a gross basis, but are weighted for the probability of exercise.
Amounts are not reflective of net positions in the underlying commodities.
(b)
Notional amounts for options are included on a gross basis, but are weighted for the probability of exercise.
Consideration of Credit Risk and Concentrations — PSCo continuously monitors the creditworthiness of the counterparties to its interest rate derivatives and commodity derivative contracts prior to settlement and assesses each counterparty’s ability to perform on the transactions set forth in the contracts. The impact of credit risk was immaterial to the fair value of unsettled commodity derivatives presented in the consolidated balance sheets.
PSCo’s most significant concentrations of credit risk with particular entities or industries are contracts with counterparties to its wholesale, trading and non-trading commodity activities.

At June 30, 2019, six2020, 5 of PSCo’s 10 most significant counterparties for these activities, comprising $33.0$112.3 million, or 49%77%, of this credit exposure, had investment grade credit ratings from S&P Global Ratings, Moody’s Investor Services or Fitch Ratings. ThreeNaN of the 10 most significant counterparties, comprising $7.7$15.0 million, or 11%10%, of this credit exposure, were not rated by these external agencies, but based on PSCo’s internal analysis, had credit quality consistent with investment grade. OneTwo of these significant counterparties, comprising $8.4$6.7 million, or 12%5%, of this credit exposure, had credit quality less than investment grade, based on external and internal analysis. SevenNaN of these significant counterparties are independent system operators, municipal or cooperative electric entities, RTO’s or other utilities.
ImpactThe impact of derivative activity:
  Pre-Tax Fair Value Gains (Losses) Recognized During the Period in:
(Millions of Dollars) Accumulated Other
Comprehensive Loss
 Regulatory(Assets) and Liabilities
Three Months Ended June 30, 2019    
Other derivative instruments    
Natural gas commodity $
 $(1.5)
Total $
 $(1.5)
     
Six Months Ended June 30, 2019    
Other derivative instruments    
Natural gas commodity $
 $(1.5)
Total $
 $(1.5)
     
Three Months Ended June 30, 2018    
Other derivative instruments    
Natural gas commodity $
 $(0.2)
Total $
 $(0.2)
     
Six Months Ended June 30, 2018    
Other derivative instruments    
Natural gas commodity $
 $(0.4)
Total $
 $(0.4)
 Pre-Tax (Gains) Losses
Reclassified into Income
During the Period from:
 
Pre-Tax Gains
(Losses) Recognized
During the Period in Income
 
(Millions of Dollars)Accumulated
Other
Comprehensive Loss
 Regulatory
Assets and (Liabilities)
  
Three Months Ended June 30, 2019      
Derivatives designated as cash flow hedges      
Interest rate$0.4
(a) 
$
 $
 
Total$0.4
 $
 $
 
Other derivative instruments      
Commodity trading$
 $
 $3.3
(b) 
Total$
 $
 $3.3
 
       
Six Months Ended June 30, 2019      
Derivatives designated as cash flow hedges      
Interest rate$0.8
(a) 
$
 $
 
Total$0.8
 $
 $
 
Other derivative instruments      
Commodity trading$
 $
 $4.7
(b) 
Natural gas commodity
 (1.3)
(c) 
(2.0)
(c) 
Total$
 $(1.3) $2.7
 
       
Three Months Ended June 30, 2018      
Derivatives designated as cash flow hedges      
Interest rate$0.4
(a) 
$
 $
 
Total$0.4
 $
 $
 
Other derivative instruments      
Commodity trading$
 $
 $0.2
(b) 
Total$
 $
 $0.2
 
       
Six Months Ended June 30, 2018      
Derivatives designated as cash flow hedges      
Interest rate$0.8
(a) 
$
 $
 
Total$0.8
 $
 $
 
Other derivative instruments      
Commodity trading$
 $
 $0.7
(b) 
Natural gas commodity
 2.7
(c) 
(1.6)
(c) 
Total$
 $2.7
 $(0.9) 

(a)
Amounts are recorded to interest charges.
Pre-Tax Fair Value
Gains (Losses) Recognized
During the Period in:
(b)(Millions of Dollars)
Amounts are recorded to interest charges. Amounts are recorded to electric operating revenues. Portions of these gainsAccumulated Other
Comprehensive Loss
Regulatory (Assets) and losses are subject to sharing with electric customers through margin-sharing mechanisms and deducted from gross revenue as appropriate.Liabilities
Three Months Ended June 30, 2020
(c)
Other derivative instruments
Amounts for both the three and six months ended
Natural gas commodity$— $(2.8)
Total$— $(2.8)
Six Months Ended June 30, 2019 included no settlement gain or losses on derivatives entered to mitigate natural2020
Other derivative instruments
Natural gas price risk for electric generation recorded to electric fuel and purchased power, subject to cost-recovery mechanisms and reclassified to a regulatory asset, as appropriate. Amounts for the three and six months endedcommodity$— $(2.8)
Total$— $(2.8)
Three Months Ended June 30, 2018 included no such settlement gains or losses and $1.2 million of such settlement losses, respectively. Remaining2019
Other derivative settlement losses for the three and six months endedinstruments
Natural gas commodity$— $(1.5)
Total$— $(1.5)
Six Months Ended June 30, 2019 and 2018 relate to natural
Other derivative instruments
Natural gas operations and are recorded to cost of natural gas sold and transported. These gains and losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset or liability, as appropriate.commodity$— $(1.5)
Total$— $(1.5)
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Pre-Tax (Gains) Losses
Reclassified into Income
During the Period from:
Pre-Tax Gains
(Losses) Recognized
During the Period in Income
(Millions of Dollars)Accumulated
Other
Comprehensive Loss
Regulatory
Assets and (Liabilities)
Three Months Ended June 30, 2020
Derivatives designated as cash flow hedges
Interest rate$0.4  
(a)
$—  $—  
Total$0.4  $—  $—  
Other derivative instruments
Commodity trading$—  $—  $(1.4) 
(b)
Total$—  $—   $(1.4) 
Six Months Ended June 30, 2020
Derivatives designated as cash flow hedges
Interest rate$0.8  
(a)
$—  $—  
Total$0.8   $—  $—  
Other derivative instruments
Commodity trading$—  $—  $(5.3) 
(b)
Natural gas commodity—  3.4  
(c)
(3.4) 
(c)
Total$—  $3.4  $(8.7) 

(a) Amounts are recorded to interest charges.
(b) Amounts are recorded to electric operating revenues. Portions of these gains and losses are subject to sharing with electric customers through margin-sharing mechanisms and deducted from gross revenue as appropriate.
(c) Amounts for the three and six months ended June 30, 2020, included 0 settlement gain or losses on derivatives entered to mitigate natural gas price risk for electric generation recorded to electric fuel and purchased power, subject to cost-recovery mechanisms and reclassified to a regulatory asset, as appropriate. Remaining derivative settlement losses for the three and six months ended June 30, 2020, relate to natural gas operations and are recorded to cost of natural gas sold and transported. These gains and losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset or liability, as appropriate.





























Pre-Tax (Gains) Losses
Reclassified into Income
During the Period from:
Pre-Tax Gains
(Losses) Recognized
During the Period in Income
(Millions of Dollars)Accumulated
Other
Comprehensive Loss
Regulatory Assets and
(Liabilities)
Three Months Ended June 30, 2019
Derivatives designated as cash flow hedges
Interest rate$0.4  
(a)
$—  $—  
Total$0.4  $—  $—  
Other derivative instruments
Commodity trading$—  $—  $3.3  
(b)
Total$—  $—   $3.3  
Six months ended June 30, 2019
Derivatives designated as cash flow hedges
Interest rate$0.8  
(a)
$—  $—  
Total$0.8   $—  $—  
Other derivative instruments
Commodity trading$—  $—  $4.7  
(b)
Natural gas commodity—  (1.3) 
(c)
(2.0) 
(c)
Total$—  $(1.3) $2.7  
(a) Amounts are recorded to interest charges.
(b) Amounts are recorded to electric operating revenues. Portions of these gains and losses are subject to sharing with electric customers through margin-sharing mechanisms and deducted from gross revenue as appropriate.
(c) Amounts for the three and six months ended June 30, 2019, included 0 settlement gain or losses on derivatives entered to mitigate natural gas price risk for electric generation recorded to electric fuel and purchased power, subject to cost-recovery mechanisms and reclassified to a regulatory asset, as appropriate. Remaining derivative settlement losses for the three and six months ended June 30, 2019, relate to natural gas operations and are recorded to cost of natural gas sold and transported. These gains and losses are subject to cost-recovery mechanisms and reclassified out of income to a regulatory asset or liability, as appropriate.
PSCo had no0 derivative instruments designated as fair value hedges during the three and six months ended June 30, 20192020 and 2018.2019.

Credit Related Contingent Features Contract provisions for derivative instruments that PSCo enters into, including those accounted for as normal purchase-normal sale contracts and therefore not reflected on the consolidated balance sheets, may require the posting of collateral or settlement of the contracts for various reasons, including if PSCo’s credit ratings are downgraded below its investment grade credit rating by any of the major credit rating agencies, or for cross-default contractual provisions if there was a failure under other financing arrangements related to payment terms or other covenants. At June 30, 20192020 and Dec. 31, 2018,2019, there were no0 derivative instruments in a liability position with such underlying contract provisions with no offsetting positions or posted collateral.provisions.
Certain derivative instruments are also subject to contract provisions that contain adequate assurance clauses. These provisions allow counterparties to seek performance assurance, including cash collateral, in the event that PSCo’s ability to fulfill its contractual obligations is reasonably expected to be impaired. PSCo had no0 collateral posted related to adequate assurance clauses in derivative contracts as of June 30, 20192020 and Dec. 31, 2018.2019.


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Recurring Fair Value MeasurementsPSCo’s derivative assets and liabilities measured at fair value on a recurring basis:
 June 30, 2019 Dec. 31, 2018June 30, 2020Dec. 31, 2019
 Fair Value Fair Value
Total
 
Netting (a)
   Fair Value Fair Value
Total
 
Netting (a)
  Fair ValueFair Value
Total
Netting (a)
Fair ValueFair Value
Total
Netting (a)
(Millions of Dollars) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total(Millions of Dollars)Level 1Level 2Level 3TotalLevel 1Level 2Level 3TotalFair Value
Total
Current derivative assets                        Current derivative assets
Other derivative instruments:                        Other derivative instruments:
Commodity trading $5.4
 $33.3
 $0.2
 $38.9
 $(20.9) $18.0
 $2.3
 $65.0
 $0.1
 $67.4
 $(28.2) $39.2
Commodity trading$2.9  $17.0  $1.0  $20.9  $(18.2) $2.7  $1.9  $11.1  $0.9  $13.9  $(10.1) $3.8  
Natural gas commodity 
 0.4
 
 0.4
 
 0.4
 
 3.4
 
 3.4
 
 3.4
Natural gas commodity—  5.3  —  5.3  —  5.3  —  3.4  —  3.4  —  3.4  
Total current derivative assets $5.4
 $33.7
 $0.2
 $39.3
 $(20.9) 18.4
 $2.3
 $68.4
 $0.1
 $70.8
 $(28.2) 42.6
Total current derivative assets$2.9  $22.3  $1.0  $26.2  $(18.2) $8.0  $1.9  $14.5  $0.9  $17.3  $(10.1) $7.2  
PPAs (b)
           
           
Current derivative instruments           $18.4
           $42.6
Noncurrent derivative assets                        Noncurrent derivative assets
Other derivative instruments:                        Other derivative instruments:
Commodity trading $0.2
 $4.6
 $
 $4.8
 $(2.3) $2.5
 $
 $1.6
 $
 $1.6
 $(0.4) $1.2
Commodity trading$1.1  $10.8  $—  $11.9  $(11.5) $0.4  $0.4  $8.1  $1.1  $9.6  $(9.6) $—  
Total noncurrent derivative assets $0.2
 $4.6
 $
 $4.8
 $(2.3) 2.5
 $
 $1.6
 $
 $1.6
 $(0.4) 1.2
Total noncurrent derivative assets$1.1  $10.8  $—  $11.9  $(11.5) $0.4  $0.4  $8.1  $1.1  $9.6  $(9.6) $—  
PPAs (b)
           
           
Noncurrent derivative instruments           $2.5
           $1.2
June 30, 2020Dec. 31, 2019
Fair ValueFair Value
Total
Netting (a)
Fair ValueFair Value
Total
Netting (a)
(Millions of Dollars)Level 1Level 2Level 3TotalLevel 1Level 2Level 3Total
Current derivative liabilities
Other derivative instruments:
Commodity trading$2.5  $24.8  $0.1  $27.4  $(18.2) $9.2  $1.7  $16.7  $—  $18.4  $(13.1) $5.3  
Natural gas commodity—  4.0  —  4.0  —  4.0  —  3.4  —  3.4  —  3.4  
Total current derivative liabilities$2.5  $28.8  $0.1  $31.4  $(18.2) $13.2  $1.7  $20.1  $—  $21.8  $(13.1) $8.7  
Noncurrent derivative liabilities
Other derivative instruments:
Commodity trading$1.2  $43.1  $18.0  $62.3  $(14.7) $47.6  $0.4  $47.0  $14.7  $62.1  $(9.6) $52.5  
Total noncurrent derivative liabilities$1.2  $43.1  $18.0  $62.3  $(14.7) $47.6  $0.4  $47.0  $14.7  $62.1  $(9.6) $52.5  
  June 30, 2019 Dec. 31, 2018
  Fair Value Fair Value
Total
 
Netting (a)
   Fair Value Fair Value
Total
 
Netting (a)
  
(Millions of Dollars) Level 1 Level 2 Level 3   Total Level 1 Level 2 Level 3   Total
Current derivative liabilities                        
Other derivative instruments:                        
Commodity trading $5.5
 $31.4
 $
 $36.9
 $(27.3) $9.6
 $2.4
 $64.2
 $
 $66.6
 $(34.7) $31.9
Total current derivative liabilities $5.5
 $31.4
 $
 $36.9
 $(27.3) 9.6
 $2.4
 $64.2
 $
 $66.6
 $(34.7) 31.9
PPAs (b)
           0.1
           2.7
Current derivative instruments           $9.7
           $34.6
Noncurrent derivative liabilities                        
Other derivative instruments:                        
Commodity trading $0.2
 $2.7
 $
 $2.9
 $(2.3) $0.6
 $
 $1.1
 $
 $1.1
 $(0.5) $0.6
Total noncurrent derivative liabilities $0.2
 $2.7
 $
 $2.9
 $(2.3) 0.6
 $
 $1.1
 $
 $1.1
 $(0.5) 0.6
PPAs (b)
           
           
Noncurrent derivative instruments           $0.6
           $0.6
(a)PSCo nets derivative instruments and related collateral in its consolidated balance sheet when supported by a legally enforceable master netting agreement, and all derivative instruments and related collateral amounts were subject to master netting agreements at June 30, 2020 and Dec. 31, 2019. At both June 30, 2020 and Dec. 31, 2019, derivative liabilities include 0 obligations to return cash collateral and the right to reclaim cash collateral of $3.2 million and $3.0 million, respectively. The counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.
(a)

PSCo nets derivative instruments and related collateral in its consolidated balance sheet when supported by a legally enforceable master netting agreement, and all derivative instruments and related collateral amounts were subject to master netting agreements at June 30, 2019 and Dec. 31, 2018. At both June 30, 2019 and Dec. 31, 2018, derivative assets and liabilities include no obligations to return cash collateral. At June 30, 2019 and Dec. 31, 2018, derivative assets and liabilities include the rights to reclaim cash collateral of $6.4 million and $6.5 million, respectively. The counterparty netting amounts presented exclude settlement receivables and payables and non-derivative amounts that may be subject to the same master netting agreements.
(b)
During 2006, PSCo qualified these contracts under the normal purchase exception. Based onthis qualification, the contracts are no longer adjusted to fair value and the previous carrying value of these contracts will be amortized over the remaining contract lives along with the offsetting regulatory assets and liabilities.

There were $0.3 million and $1.0 million of gains recognizedChanges in earnings for Level 3 commodity tradingderivatives:
Three Months Ended June 30
(Millions of Dollars)20202019
Balance at April 1$(14.6) $(0.1) 
Settlements(0.3) —  
Net transactions recorded during the period: 
(Losses) gains recognized in earnings (a)
(2.2) 0.3  
Balance at June 30$(17.1) $0.2  
Six Months Ended June 30
(Millions of Dollars)20202019
Balance at Jan. 1$(12.7) $0.1  
Settlements(1.1) (0.9) 
Net transactions recorded during the period:
(Losses) gains recognized in earnings (a)
(3.3) 1.0  
Balance at June 30$(17.1) $0.2  
(a)Amounts relate to commodity derivatives inheld at the three and six months ended June 30, 2019, respectively. There were $0.1 millionend of gains recognized in earnings for Level 3 commodity trading derivatives in both the three and six months ended June 30, 2018.period.
PSCo recognizes transfers between fair value hierarchy levels as of the beginning of each period. There were no0 transfers of amounts between levels for derivative instruments for the three and six months ended June 30, 20192020 and 2018.2019.




Fair Value of Long-Term Debt
Other financial instruments for which the carrying amount did not equal fair value:
  June 30, 2019 Dec. 31, 2018
(Millions of Dollars) 
Carrying
Amount
 Fair Value 
Carrying
Amount
 Fair Value
Long-term debt, including current portion $4,846.1
 $5,333.3
 $4,997.6
 $5,123.2

June 30, 2020Dec. 31, 2019
(Millions of Dollars)Carrying
Amount
Fair ValueCarrying
Amount
Fair Value
Long-term debt, including current portion$6,122.0  $7,250.8  $5,384.7  $6,039.3  
Fair value of PSCo’s long-term debt is estimated based on recent trades and observable spreads from benchmark interest rates for similar securities. Fair value estimates are based on information available to management as of June 30, 20192020 and Dec. 31, 2018,2019, and given the observability of the inputs, fair values presented for long-term debt were assigned as Level 2.







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8.Benefit Plans and Other Postretirement Benefits
Components of Net Periodic Benefit Cost (Credit)
  Three Months Ended June 30
  2019 2018 2019 2018
(Millions of Dollars) Pension Benefits Postretirement Health
Care Benefits
Service cost $6.4
 $7.3
 $0.1
 $0.2
Interest cost (a)
 12.9
 11.8
 3.9
 3.8
Expected return on plan assets (a)
 (17.1) (17.1) (4.7) (5.7)
Amortization of prior service credit (a)
 (0.8) (0.9) (1.3) (1.6)
Amortization of net loss (a)
 6.3
 7.8
 0.7
 1.0
Net periodic benefit cost (credit) 7.7
 8.9
 (1.3) (2.3)
Credits not recognized due to the effects of regulation 1.8
 0.9
 0.2
 
Net benefit cost (credit) recognized for financial reporting $9.5
 $9.8
 $(1.1) $(2.3)
 Three Months Ended June 30
 2020201920202019
(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
Service cost$7.6  $6.4  $0.1  $0.1  
Interest cost (a)
11.4  12.9  3.2  3.9  
Expected return on plan assets (a)
(17.6) (17.1) (4.4) (4.7) 
Amortization of prior service credit (a)
(0.7) (0.8) (1.0) (1.3) 
Amortization of net loss (a)
7.5  6.3  0.4  0.7  
Net periodic benefit cost (credit)8.2  7.7  (1.7) (1.3) 
Credits not recognized due to effects of regulation(0.3) 1.8  1.0  0.2  
Net benefit cost (credit) recognized for financial reporting$7.9  $9.5  $(0.7) $(1.1) 
Six Months Ended June 30
2020201920202019
(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
Service cost$15.3  $12.8  $0.1  $0.2  
Interest cost (a)
22.9  25.8  6.4  7.8  
Expected return on plan assets (a)
(35.3) (34.2) (8.7) (9.4) 
Amortization of prior service credit (a)
(1.4) (1.7) (1.9) (2.7) 
Amortization of net loss (a)
14.9  12.7  0.8  1.5  
Net periodic benefit cost (credit)16.4  15.4  (3.3) (2.6) 
Credits not recognized due to effects of regulation0.3  3.6  1.6  0.5  
Net benefit cost (credit) recognized for financial reporting$16.7  $19.0  $(1.7) $(2.1) 
  Six Months Ended June 30
  2019 2018 2019 2018
(Millions of Dollars) Pension Benefits Postretirement Health
Care Benefits
Service cost $12.8
 $14.6
 $0.2
 $0.3
Interest cost (a)
 25.8
 23.6
 7.8
 7.5
Expected return on plan assets (a)
 (34.2) (34.3) (9.4) (11.3)
Amortization of prior service credit (a)
 (1.7) (1.7) (2.7) (3.1)
Amortization of net loss (a)
 12.7
 15.6
 1.5
 2.0
Net periodic benefit cost (credit) 15.4
 17.8
 (2.6) (4.6)
Credits not recognized due to the effects of regulation 3.6
 2.4
 0.5
 
Net benefit cost (credit) recognized for financial reporting $19.0
 $20.2
 $(2.1) $(4.6)
(a)
The components of net periodic cost other than the service cost component are included in the line item “other income (expense), net” in the consolidated statement of income or capitalized on the consolidated balance sheet as a regulatory asset.
(a)
The components of net periodic cost other than the service cost component are included in the line item “other income, net” in the consolidated statement of income or capitalized on the consolidated balance sheet as a regulatory asset.
In January 2019,2020, contributions of $150$150.0 million were made across four4 of Xcel Energy’s pension plans, of which $43$50.0 million was attributable to PSCo. On July 1, 2019, Xcel Energy made a $4 million contribution to the Xcel Energy Inc. Non-Bargaining Pension Plan (South), of which $3 million was attributable to PSCo, and does not expect any additional pension contributions during 2019.2020.
9.Commitments and Contingencies
The following include commitments, contingencies and unresolved contingencies that are material to PSCo’s financial position.
Legal Contingencies
PSCo is involved in various litigation matters in the ordinary course of business. The assessment of whether a loss is probable or is a reasonable possibility, and whether the loss or a range of loss is estimable, often involves a series of complex judgments about future events. Management maintains accruals for losses probable of being incurred and subject to reasonable estimation.
Management is sometimes unable to estimate an amount or range of a reasonably possible loss in certain situations, including but not limited to, when (1) the damages sought are indeterminate, (2) the proceedings are in the early stages, or (3) the matters involve novel or unsettled legal theories. In such cases, there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss.
For current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, would have a material effect on PSCo’s financial statements. Unless otherwise required by GAAP, legal fees are expensed as incurred.
Gas Trading Litigation e prime is a wholly owned subsidiary of Xcel Energy. e prime was in the business of natural gas trading and marketing but has not engaged in natural gas trading or marketing activities since 2003. Multiple lawsuits seeking monetary damages were commenced against e prime and its affiliates, including Xcel Energy, between 2003 and 2009 alleging fraud and anticompetitive activities in conspiring to restrain the trade of natural gas and manipulate natural gas prices. Cases were all consolidated in the U.S. District Court in Nevada.
TwoNaN cases remain active which include an MDL matter consisting of a Colorado purported class (Breckenridge) and a Wisconsin purported class (Arandell Corp.).
Breckenridge/Colorado - The— In February 2019, the MDL panel remanded Breckenridge back to the U.S. District Court in Colorado and assigned to a judge.Colorado.

Arandell Corp. - In February 2019, Xcel Energy filed a no opposition motion to have the case was remanded back to the U.S. District Court in Wisconsin. The motion was granted andPlaintiffs are seeking class certification. It is uncertain when the case has been remanded back to the District Court.court will rule on this issue.
Xcel Energy has concluded that a loss is remote for both remaining lawsuits.
Employment, Tort and Commercial Litigation
Line Extension Disputes — In December 2015, the DRC filed a lawsuit seeking monetary damages in the Denver District Court, stating PSCo failed to award proper allowances and refunds for line extensions to new developments pursuant to the terms of electric and gas service agreements. The dispute involves claims by over fifty developers. In February 2018, the Colorado Supreme Court denied DRC’s petition to appeal the Denver District Court’s dismissal of the lawsuit, effectively terminating this litigation. However, in January 2018, DRC filed a new lawsuit in Boulder County District Court, asserting a single claim that PSCo was required to file its line extension agreements with the CPUC but failed to do so.
This claim is similar to the arguments previously raised by DRC. PSCo filed a motion to dismiss this claim, which was granted in May 2018. DRC subsequently filed an appeal to the Colorado Court of Appeals. Briefs have been filed and it is uncertain when a decision will be rendered.
PSCo has concluded that a loss is remote with respect to both of these matters as the service agreements were developed to implement CPUC approved tariffs and PSCo has complied with the tariff provisions. If a loss were sustained, PSCo believes it would be allowed to recover costs through traditional regulatory mechanisms. Amount or range in dispute is presently unknown and no accrual has been recorded for this matter.
Environmental
MGP, Landfill orand Disposal Sites
PSCo is cooperating with the City of Denver on an environmental investigation of the Rice Yards Site in the Central Platte Valley of Denver, Colorado, which had various historic industrial uses by multiple parties, including railroad, maintenance shop, scrap metal yard and MGP operations.
In the 1990’s, environmental remediation activities took place at the site under state oversight to accommodate the development of an amusement park and parking lots. The area is being redeveloped into residential and commercial mixed uses, andJune 2020, PSCo is in discussions withresolved claims by the current property owner regarding legal claims relatedand agreed to contribute up to a maximum of $9.3 million towards future environmental investigation, remediation and mitigation measures over the next 15 years.
In addition to the Rice Yards Site.
In addition,Site, PSCo is currently investigating, remediating or remediating twoperforming post-closure actions at 2 other MGP, landfill or other disposal sites across its service territories.territory.
PSCo has recognized its best estimate of costs/liabilities that will result from final resolution of these issues, however, the outcome and timing is unknown. In addition, there may be insurance recovery and/or recovery from other potentially responsible parties, offsetting a portion of the costs incurred.
Environmental Requirements — Water and Waste
Coal Ash Regulation PSCo’s operations are subject to federal and state lawsregulations that impose requirements for handling, storage, treatment and disposal of solid waste.
Under the CCR Rule, utilities are required to complete groundwater sampling around their CCR landfills and surface impoundments. By the end of 2019, only six of PSCo’sCurrently, PSCo has 6 regulated ash units are expected to be in operation.
PSCo is conducting groundwater sampling and where appropriate, initiating theimplementing assessment of corrective measures at certain CCR landfills and surface impoundments. In 2019, groundwater monitoring consistent with the CCR Rule was conducted. Statistically significant levels above background concentrations were detected at 4 locations.
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Subsequently, assessment monitoring samples were collected at these locations and, based on the results, PSCo is evaluating whetheroptions for corrective action is required at any CCR landfills or surface impoundments.
2 locations. At 1 location, monitoring results indicate potential offsite impacts to groundwater. Until PSCo completes its assessment, it is uncertain what impact, if any, there will be on the operations, financial condition or cash flows.
Leases
PSCo evaluates contracts that may contain leases, including PPAs and arrangementsIn August 2018, the United States Court of Appeals for the useDistrict of office space and other facilities, vehicles and equipment. Under ASC Topic 842, adopted by PSCo on Jan. 1, 2019, a contract contains a lease if it conveysColumbia Circuit ruled that the exclusive rightEPA cannot allow utilities to control the use of a specific asset. A contract determined to contain a lease is evaluated further to determine if the arrangement is a finance lease.
ROU assets represent PSCo's rightscontinue to use leased assets. Starting inunlined impoundments (including clay lined impoundments) for the storage or disposal of coal ash. In November 2019, the present valueEPA proposed rules in response to this decision that, if finalized in their current form, may require PSCo to expedite closure of future operating lease payments1 coal ash impoundment that was not previously required to close. In March 2020, the EPA published a proposed CCR Rule amendment that, if adopted, would allow unlined impoundments that ‘perform as effectively’ as lined ones to continue to operate under a state or federal CCR permit program. PSCo is pursuing options to provide alternative storage capacity consistent with the CCR Rule until the generating units are recognizedretired in other current liabilities and noncurrent operating lease liabilities. These amounts, adjusted2025.
Closure costs for any prepayments or incentives, are recognized as operating lease ROU assets.
Most of PSCo’s leases do not contain a readily determinable discount rate. Therefore, the present value of future lease payments is calculated using the estimated incremental borrowing rate (weighted-average of 4.1%). PSCo has elected to utilize the practical expedient under which non-lease components, such as asset maintenance costs included in payments, are not deducted from minimum lease payments for the purposes of lease accounting and disclosure.
Leases with an initial term of 12 months or less are classified as short-term leases and are not recognized on the consolidated balance sheet.
Operating lease ROU assets:
(Millions of Dollars) June 30, 2019
PPAs $585.1
Other 68.3
Gross operating lease ROU assets 653.4
Accumulated amortization (39.7)
Net operating lease ROU assets $613.7

In 2019, ROU assets for finance leasesexisting impoundments are included in other noncurrent assets, and the present valuecalculation of future finance lease payments is included in other current liabilities and other noncurrent liabilities. Prior to 2019, finance leases were included in property, plant and equipment, the current portion of long-term debt and long-term debt.asset retirement obligation liability.
PSCo’s most significant finance lease activities are related to WYCO.WYCO is a joint venture with CIG to develop and lease natural gas pipeline, storage and compression facilities. Xcel Energy Inc. has a 50% ownership interest in WYCO. WYCO leases its facilities to CIG, and CIG operates the facilities, providing natural gas storage and transportation services to PSCo under separate service agreements.
PSCo accounts for its Totem natural gas storage service and Front Range pipeline arrangements with CIG and WYCO, respectively, as finance leases.
Finance lease ROU assets:
(Millions of Dollars) June 30, 2019
Gas storage facilities $200.5
Gas pipeline 20.7
Gross finance lease ROU assets 221.2
Accumulated amortization (79.2)
Net finance lease ROU assets $142.0


Components of lease expense:
(Millions of Dollars) Three Months Ended June 30, 2019 Six Months Ended June 30, 2019
Operating leases    
PPA capacity payments $24.7
 $49.0
Other operating leases (a)
 3.6
 7.2
Total operating lease expense (b)
 $28.3
 $56.2
     
Finance leases    
Amortization of ROU assets $1.5
 $3.0
Interest expense on lease liability 4.7
 9.5
Total finance lease expense $6.2
 $12.5
(a)
Includes short-term lease expense of $0.3 million for three months ended June 30, 2019 and $0.7 million for six months ended June 30, 2019.
(b)
PPA capacity payments are included in electric fuel and purchased power on the consolidated statements of income. Expense for other operating leases is included in O&M expense and electric fuel and purchased power.
Future commitments under operating and finance leases as of June 30, 2019:
(Millions of Dollars) 
PPA (a) (b)
Operating
Leases
 
Other Operating
Leases
 
Total
Operating
Leases
 Finance Leases
2019 $47.8
 $6.5
 $54.3
 $12.4
2020 95.9
 13.2
 109.1
 24.8
2021 96.4
 12.1
 108.5
 23.6
2022 82.6
 11.2
 93.8
 20.5
2023 70.0
 10.9
 80.9
 20.3
Thereafter 288.6
 29.2
 317.8
 420.4
Total minimum obligation 681.3
 83.1
 764.4
 522.0
Interest component of obligation (106.4) (13.8) (120.2) (380.0)
Present value of minimum obligation $574.9
 $69.3
 644.2
 142.0
Less current portion     (83.9) (6.5)
Noncurrent operating and finance lease liabilities     $560.3
 $135.5
         
Weighted-average remaining lease term in years     8.3
 39.0
(a)
Amounts do not include PPAs accounted for as executory contracts and/or contingent payments, such as energy payments on renewable PPAs.
(b)
PPA operating leases contractually expire at various dates through 2032.
Future commitments under operating and finance leases as of Dec. 31, 2018:
(Millions of Dollars) 
PPA (a) (b)
Operating
Leases
 
Other Operating
Leases
 
Total
Operating
Leases
 Finance Leases
2019 $95.5
 $10.8
 $106.3
 $24.9
2020 95.9
 10.7
 106.6
 24.8
2021 96.4
 9.5
 105.9
 23.6
2022 82.6
 8.4
 91.0
 20.5
2023 70.0
 8.1
 78.1
 20.3
Thereafter 288.6
 53.4
 342.0
 420.4
Total minimum obligation 

 

 

 534.5
Interest component of obligation       (389.5)
Present value of minimum obligation     $145.0
(a)
Amounts do not include PPAs accounted for as executory contracts and/or contingent payments, such as energy payments on renewable PPAs.
(b)
PPA operating leases contractually expire at various dates through 2032.
Variable Interest EntitiesVIEs 
Under certain PPAs, PSCo purchases power from IPPs andfor which PSCo is required to reimburse the IPPs for fuel costs, or to participate in tolling arrangements under which PSCo procures the natural gas required to produce the energy that it purchases. These specific PPAs create a variable interest in the associated IPP.
PSCo had approximately 1,4421,518 MW and 1,5711,442 MW of capacity under long-term PPAs as ofat June 30, 20192020 and Dec. 31, 2018,2019, respectively, with entities that have been determined to be VIEs. PSCo concluded that these entities are not required to be consolidated in its consolidated financial statements because it does not have the power to direct the activities that most significantly impact the entities’ economic performance. These agreementsAgreements have various expiration dates through 2032.
10.Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive loss, net of tax, for the three and six months ended June 30, 20192020 and 2018:2019:
Three Months Ended June 30, 2020Three Months Ended June 30, 2019
(Millions of Dollars)Gains and Losses
on Cash Flow Hedges
Defined Benefit Pension and
Postretirement Items
TotalGains and Losses
on Cash Flow Hedges
Defined Benefit Pension and
Postretirement Items
Total
Accumulated other comprehensive loss at April 1$(23.8) $(2.5) $(26.3) $(25.0) $(0.2) $(25.2) 
Losses reclassified from net accumulated other comprehensive loss:
     Interest rate derivatives (net of taxes of $0.1, $—, $0.1 and $—, respectively) (a)
0.3  —  0.3  0.3  —  0.3  
Net current period other comprehensive income0.3  —  0.3  0.3  —  0.3  
Accumulated other comprehensive loss at June 30$(23.5) $(2.5) $(26.0) $(24.7) $(0.2) $(24.9) 
  Three Months Ended June 30, 2019 Three Months Ended June 30, 2018
(Millions of Dollars) 
Gains and Losses
on Cash Flow Hedges
 
Defined Benefit Pension and
Postretirement Items
 Total 
Gains and Losses
on Cash Flow Hedges
 
Defined Benefit Pension and
Postretirement Items
 Total
Accumulated other comprehensive loss at April 1 $(25.0) $(0.2) $(25.2) $(26.1) $(0.3) $(26.4)
Losses reclassified from net accumulated other comprehensive loss:            
Interest rate derivatives (net of taxes of $0.1, $0, $0.1 and $0, respectively) (a)
 0.3
 
 0.3
 0.3
 
 0.3
Net current period other comprehensive income 0.3
 
 0.3
 0.3
 
 0.3
Accumulated other comprehensive loss at June 30 $(24.7) $(0.2) $(24.9) $(25.8) $(0.3) $(26.1)
(a)
Included in interest charges.

Six Months Ended June 30, 2020Six Months Ended June 30, 2019
(Millions of Dollars)Gains and Losses
on Cash Flow Hedges
Defined Benefit Pension and
Postretirement Items
TotalGains and Losses
on Cash Flow Hedges
Defined Benefit Pension and
Postretirement Items
Total
Accumulated other comprehensive loss at Jan. 1$(24.1) $(2.5) $(26.6) $(25.3) $(0.2) $(25.5) 
Losses reclassified from net accumulated other comprehensive loss:
     Interest rate derivatives (net of taxes of $0.2, $—, $0.1 and $—, respectively) (a)
0.6  —  0.6  0.6  —  0.6  
Net current period other comprehensive income0.6  —  0.6  0.6  —  0.6  
Accumulated other comprehensive loss at June 30$(23.5) $(2.5) $(26.0) $(24.7) $(0.2) $(24.9) 
  Six Months Ended June 30, 2019 Six Months Ended June 30, 2018
(Millions of Dollars) 
Gains and Losses
on Cash Flow Hedges
 
Defined Benefit Pension and
Postretirement Items
 Total 
Gains and Losses
on Cash Flow Hedges
 
Defined Benefit Pension and
Postretirement Items
 Total
Accumulated other comprehensive loss at Jan. 1 $(25.3) $(0.2) $(25.5) $(26.4) $(0.3) $(26.7)
Losses reclassified from net accumulated other comprehensive loss:            
Interest rate derivatives (net of taxes of $0.1, $0, $0.2 and $0, respectively) (a)
 0.6
 
 0.6
 0.6
 
 0.6
Net current period other comprehensive income 0.6
 
 0.6
 0.6
 
 0.6
Accumulated other comprehensive loss at June 30 $(24.7) $(0.2) $(24.9) $(25.8) $(0.3) $(26.1)
(a)
Included in interest charges.
(a)
Included in interest charges.
11.Segment Information
Operating results from the regulated electric utility and regulated natural gas utility are each separately and regularly reviewed by PSCo’s chief operating decision maker. PSCo evaluates performance based on profit or loss generated from the product or service provided. These segments are managed separately because the revenue streams are dependent upon regulated rate recovery, which is separately determined for each segment.
PSCo has the following reportable segments:
Regulated Electric — The regulated electric utility segment generates electricity which is transmitted and distributed in Colorado. This segment includes sales for resale and provides wholesale transmission service to various entities in the United States. Regulated electric utility also includes PSCo’s wholesale commodity and trading operations; and
Regulated Natural Gas — The regulated natural gas utility segment transports, stores and all other.distributes natural gas in portions of Colorado.
Regulated Electric - The regulated electric utility segment generates electricity which is transmitted and distributed in Colorado. This segment includes sales for resale and provides wholesale transmission service to various entities in the United States. Regulated electric utility also includes PSCo’s wholesale commodity and trading operations.
PSCo presents Other, which includes operating segments with revenues below the necessary quantitative thresholds. Those operating segments primarily include steam revenue, appliance repair services and non-utility real estate activities.
Regulated Natural Gas - The regulated natural gas utility segment transports, stores and distributes natural gas in portions of Colorado.
All Other - Revenues from operating segments not included above are below the necessary quantitative thresholds are included in the all other category. Those primarily include steam revenue, appliance repair services and nonutility real estate activities.
Asset and capital expenditure information is not provided for PSCo’s reportable segments because as an integrated electric and natural gas utility, PSCo operates significant assets that are not dedicated to a specific business segment and reporting assets and capital expenditures by business segment would require arbitrary and potentially misleading allocations, which may not necessarily reflect the assets that would be required for the operation of the business segments on a stand-alone basis.
Certain
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To report income from operations for regulated electric and regulated natural gas utility segments, the majority of costs are directly assigned to each segment. However, some costs, such as common depreciation, common O&M expenses and interest expense are allocated based on cost causation allocators across each segment. In addition, aallocators. A general allocator is used for certain general and administrative expenses, including office supplies, rent, property insurance and general advertising.
PSCo’s segment information for the three and six months ended June 30:
Three Months Ended June 30
(Millions of Dollars)20202019
Regulated Electric
Operating revenues$715.4  $692.7  
Intersegment revenues0.1  0.1  
Total revenue$715.5  $692.8  
Net income89.0  84.8  
Regulated Natural Gas
Operating revenues$186.2  $207.6  
Net income16.0  17.6  
All Other
Operating revenues (a)
$9.5  $9.7  
Net income (loss)3.1  (0.9) 
Consolidated Total
Operating revenues (a)
$911.2  $910.1  
Reconciling eliminations(0.1) (0.1) 
Total operating revenues$911.1  $910.0  
Net income108.1  101.5  
(a) Operating revenues include $1.1 million of other affiliate revenue for the three months ended June 30, 2020 and 2019.
Six Months Ended June 30
(Millions of Dollars)20202019
Regulated Electric
Operating revenues$1,427.2  $1,434.2  
Intersegment revenues0.2  0.2  
Total revenue$1,427.4  $1,434.4  
Net income163.0  167.2  
Regulated Natural Gas
Operating revenues$517.7  $676.7  
Intersegment revenues(0.1) 0.1  
Total revenue$517.6  $676.8  
Net income68.1  76.8  
All Other
Operating revenues (a)
$22.9  $22.1  
Net income (loss)5.7  (3.7) 
Consolidated Total
Operating revenues (a)
$1,967.9  $2,133.3  
Reconciling eliminations(0.1) (0.3) 
Total operating revenues$1,967.8  $2,133.0  
Net income236.8  240.3  
(a) Operating revenues include $2.2 million of other affiliate revenue for the six months ended June 30, 2020 and 2019.

  Three Months Ended June 30
(Millions of Dollars) 2019 2018
Regulated Electric    
Operating revenues $692.7
 $716.2
Intersegment revenues 0.1
 0.1
Total revenue 692.8
 716.3
Net income 84.8
 101.9
Regulated Natural Gas    
Operating revenues $207.6
 $186.7
Intersegment revenues 
 0.1
Total revenue 207.6
 186.8
Net income 17.6
 21.0
All Other    
Operating revenues (a)
 $9.7
 $9.0
Net loss (0.9) (0.6)
Consolidated Total    
Operating revenues (a)
 $910.1
 $912.1
Reconciling eliminations (0.1) (0.2)
Total revenue $910.0
 $911.9
Net income 101.5
 122.3
(a)
Operating revenues include $1.1 million of other affiliate revenue for the three months ended June 30, 2019 and 2018.

  Six Months Ended June 30
(Millions of Dollars) 2019 2018
Regulated Electric    
Operating revenues $1,434.2
 $1,414.5
Intersegment revenues 0.2
 0.2
Total revenue 1,434.4
 1,414.7
Net income 167.2
 181.5
Regulated Natural Gas    
Operating revenues $676.7
 $550.6
Intersegment revenues 0.1
 0.1
Total revenue 676.8
 550.7
Net income 76.8
 74.7
All Other    
Operating revenues (a)
 $22.1
 $20.1
Net loss (3.7) (0.2)
Consolidated Total    
Operating revenues (a)
 $2,133.3
 $1,985.5
Reconciling eliminations (0.3) (0.3)
Total revenue $2,133.0
 $1,985.2
Net income 240.3
 256.0

(a)
Operating revenues include $2.2 million of other affiliate revenue for the six months ended June 30, 2019 and 2018.
ItemITEM 2 — MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Discussion of financial condition and liquidity for PSCo is omitted per conditions set forth in general instructions H(1)(a) and (b) of Form 10-Q for wholly owned subsidiaries. It is replaced with management’s narrative analysis of the results of operations set forth in general instructions H(2)(a) of Form 10-Q for wholly owned subsidiaries (reduced disclosure format).
Non-GAAP Financial Measures
The following discussion includes financial information prepared in accordance with GAAP, as well as certain non-GAAP financial measures such as electric margin, natural gas margin and ongoing earnings. Generally, a non-GAAP financial measure is a measure of a company’s financial performance, financial position or cash flows that excludes (or includes) amounts that are adjusted from measures calculated and presented in accordance with GAAP. PSCo’s management uses non-GAAP measures for financial planning and analysis, for reporting of results, in determining performance-based compensation and communicating its earnings outlook to analysts and investors. Non-GAAP financial measures are intended to supplement investors’ understanding of our performance and should not be considered alternatives for financial measures presented in accordance with GAAP. These measures are discussed in more detail below and may not be comparable to other companies’ similarly titled non-GAAP financial measures.
Electric and Natural Gas Margins
Electric margin is presented as electric revenues less electric fuel and purchased power expenses. Natural gas margin is presented as natural gas revenues less the cost of natural gas sold and transported. Expenses incurred for electric fuel and purchased power and the cost of natural gas are generally recovered through various regulatory recovery mechanisms. As a result, changes in these expenses are generally offset in operating revenues.
Management believes electric and natural gas margins provide the most meaningful basis for evaluating our operations because they exclude the revenue impact of fluctuations in these expenses. These margins can be reconciled to operating income, a GAAP measure, by including other operating revenues, cost of sales-other, O&M expenses, conservation and demand side managementDSM expenses, depreciation and amortization and taxes (other than income taxes).
Results of Operations
PSCo’s net income was approximately $236.8 million for the six months ended June 30, 2020, compared with approximately $240.3 million for the second quarter of 2019, compared with approximately $256.0 million for the same period of 2018.prior year. The decrease in year-to-date earnings was driven by lower sales and demand revenue primarily due to COVID-19, higher O&Mdepreciation, interest charges and depreciationlower natural gas margins due to unfavorable weather, partially offset by the timing of gas rateshigher AFUDC, an increase in 2018electric margins (regulatory outcomes offset lower sales due to COVID-19) and higher gas sales.lower O&M.
Electric Margin
Electric revenues and fuel and purchased power expenses are impacted by fluctuations in the price of natural gas and coal used in the generation of electricity. However, these price fluctuations have minimal impact on electric margin due to fuel recovery mechanisms that recover fuel expenses. In addition, electric customers receive a credit for PTCs that are generated in a particular period.
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Electric revenues and margin:
 Six Months Ended June 30Six Months Ended June 30
(Millions of Dollars) 2019 2018(Millions of Dollars)20202019
Electric revenues $1,434.2
 $1,414.5
Electric revenues$1,427.2  $1,434.2  
Electric fuel and purchased power (544.9) (553.1)Electric fuel and purchased power(529.2) (544.9) 
Electric margin $889.3
 $861.4
Electric margin$898.0  $889.3  
Changes in electric margin:
(Millions of Dollars)2020 vs. 2019
Regulatory rate outcome$15.5 
Estimated impact of weather5.3 
Wholesale transmission revenue (net)3.4 
PTCs0.5 
Sales and demand (a)
(23.7)
Other, net7.7 
Total increase in electric margin$8.7 
(Millions of Dollars) Three Months Ended June 30, 2019 vs. 2018
Non-fuel riders $32.5
Finance leases (offset in interest expense and amortization) 10.9
Timing of tax reform regulatory decisions (offset in income tax and amortization) 6.0
Estimated impact of weather (11.0)
Wholesale transmission revenue (net) (2.5)
Other, net (8.0)
Total increase in electric margin $27.9
(a)Sales decline excludes weather impact, net of decoupling.
Natural Gas Margin
Total naturalNatural gas expense varies with changing sales and the cost of natural gas. However, fluctuations in the cost of natural gas have minimal impact on natural gas margin due to natural gas cost recovery mechanisms.
Natural gas revenues and margin:
 Six Months Ended June 30Six Months Ended June 30
(Millions of Dollars) 2019 2018(Millions of Dollars)20202019
Natural gas revenues $676.7
 $550.6
Natural gas revenues$517.7  $676.7  
Cost of natural gas sold and transported (342.4) (249.8)Cost of natural gas sold and transported(187.4) (342.4) 
Natural gas margin $334.3
 $300.8
Natural gas margin$330.3  $334.3  

Changes in natural gas margin:
(Millions of Dollars) Three Months Ended June 30, 2019 vs. 2018
Retail rate increase $11.9
Estimated impact of weather 8.7
Infrastructure and integrity riders 5.2
Transport sales 3.7
Retail sales growth (excluding weather impact) 3.5
Other, net 0.5
Total increase in natural gas margin $33.5
(Millions of Dollars)2020 vs. 2019
Estimated impact of weather$(6.2)
Sales decline(2.9)
Transport sales(2.3)
Infrastructure and integrity riders6.5 
Other, net0.9 
Total decrease in natural gas margin$(4.0)
Non-Fuel Operating Expenses and Other Items

O&M Expenses — O&M expenses increased $27.4decreased $5.7 million, or 7.4%1.4%, for 2019 year-to-date. Increasethe six months ended June 30, 2020, compared with the prior year. The decrease was primarily driven by distribution, plant generation and natural gas operations costs. Distribution costs were higher due to storms, meterscost mitigation efforts to offset the negative impacts of COVID-19 including allocation of workforce, material and vegetation management. Plant generationsupply management, performance of maintenance, as well as, the outcome of the CPUC’s rehearing of the Colorado 2019 electric rate case. Decreases were partially offset by increased gas emergency response costs and strategic initiative amounts including increased due to the Rush Creek wind project being placed in-servicespending on customer experience transformation and the timing of planned maintenance and overhauls. Natural gas operation expenses increased due to pipeline maintenance.advanced grid infrastructure.
Depreciation and Amortization Depreciation and amortization expense increased $56.8$19.5 million, or 23.8%6.6%, for 2019 year-to-date. Increasethe six months ended June 30, 2020, compared with the prior year. The increase was primarily drivendue to normal system expansion and new electric rates implemented in March 2020, partially offset by the Rush Creek wind project being placed in-service (recovereda decrease in riders), additional amortization of a prepaid pension asset in Colorado related to tax reform settlements (offset in income taxes) and other capital investments.regulatory assets.
AFUDC, Equity and Debt AFUDC decreased $20.3increased $14.5 million for 2019 year-to-date. Decreasethe six months ended June 30, 2020, compared with the prior year. The increase was primarily due to the Rush CreekCheyenne Ridge wind project being placed in-service in 2018.farm.
Interest Charges Interest charges increased $15.9$5.9 million, or 15.7%5.0%, for 2019 year-to-date. Increasethe six months ended June 30, 2020, compared with the prior year. The increase was relatedprimarily due to higher debt levels to fund capital investments, changes inpartially offset by lower long-term and short-term interest rates and implementation of lease accounting standard (offset in electric margin).rates.
Income Taxes — Income tax expense decreased $44.6$4.6 million for the second quarter of 2019six months ended June 30, 2020, compared with 2018. Decreasethe same period in 2019. The decrease was primarily driven by wind PTCs, lower pretax earnings and an increase in plant-relatedplant regulatory differences. Wind PTCs flow back to customers (recorded as a reduction to revenue)differences and do not have a material impact on net income.lower pretax earnings. ETR was 11.0%9.6% for the first six months of 2019ended June 30, 2020, compared with 22.5%11.0% for the same period of 2018,in 2019, largely due to the adjustmentsitems referenced above.
See Note 6 to the consolidated financial statements.

Public Utility Regulation
The FERC and State Regulation various state and local regulatory commissions regulate PSCo. The electric and natural gas rates charged to PSCo’s customers are approved by the FERC has jurisdiction overor the regulatory commissions in the states in which they operate.
The rates are designed to recover plant investment, operating costs and an allowed return on investment. PSCo request changes in rates for electric transmission serviceutility services through filings with governing commissions.
Changes in interstate commerceoperating costs can affect PSCo’s financial results, depending on the timing of rate case filings and electricity sold at wholesale, hydro facility licensing, natural gas transportation, asset transactionsimplementation of final rates. Other factors affecting rate filings are new investments, sales, conservation and mergers, accounting practicesDSM efforts, and certain other activitiesthe cost of PSCo, including enforcement of North American Electric Reliability Corporation mandatory electric reliability standards. Statecapital. In addition, the regulatory commissions authorize the ROE, capital structure and local agencies have jurisdiction over many of PSCo’s activities, including regulation of retaildepreciation rates and environmental matters.
Xcel Energy, which includes PSCo, attempts to mitigate the risk of regulatory penalties through formal training on prohibited practices and a compliance function that reviews interaction with the markets under FERC and Commodity Futures Trading Commission jurisdictions. Public campaigns are conducted to raise awareness of the public safety issues of interacting with our electric systems. While programs to comply with regulatory requirements are in place, there is no guarantee the compliance programs or other measures will be sufficient to ensure against violations.rate proceedings. Decisions by these regulators can significantly impact PSCo’s results of operations.
Colorado 2019 Electric Rate CaseExcept to the extent noted in Regulation above, the circumstances set forth in Public Utility Regulation included in Item 7 of PSCo’s Annual Report on — In May 2019, PSCo filed a request withForm 10-K for the CPUC seeking a net rate increase of $158.3 million, or 5.7%. The filing also requests the transfer of $249.4 million of rider revenue to base rates, which will not impact overall customer bills as the revenue is currently being recovered through various riders. The request is based on a ROE of 10.35%, an equity ratio of 56.46%, a historic test year ended Dec. 31, 2018 (adjusted2019 and in Item 2 of PSCo’s Quarterly Report on Form 10-Q for 2019 capital investment)the quarterly period ended March 31, 2020, appropriately represent, in all material respects, the current status of public utility regulation and incorporates the full impact of tax reform. PSCo has requested rates effective Jan. 1, 2020.are incorporated by reference.
Revenue Request (Millions of Dollars) 2020
Changes since 2014 rate case:  
Plant-related growth 2013-2018 $85.3
O&M savings, sales growth and other cost reductions (89.1)
Forecasted 2019 capital additions 48.9
Advanced Grid Intelligence and Security grid modernization 39.1
Updated cost of capital 31.7
Previously approved depreciation rates 28.1
Incremental wildfire mitigation 14.3
Net increase to revenue 158.3
Previously authorized costs:  
CACJA, TCA and Rush Creek (a)
 249.4
Total base revenue request $407.7
   
Expected year-end rate base (b)
 $8,221.1
(a)
Roll-in of CACJA, TCA and Rush Creek Wind Project (excluding PTCs) amounts into base rates will not impact total revenue as costs are currently recovered from customers through riders or the fuel clause.
(b)
Base rate request does not include the impact of the proposed Colorado Energy Plan.
The procedural schedule is as follows:
Answer testimony — Sept. 6, 2019
Rebuttal testimony — Oct. 8, 2019
Evidentiary hearing — Nov. 4-13, 2019
Statement of position — Nov. 22, 2019

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Other Pending and Recently Concluded Regulatory Proceedings
MechanismUtility Service
Amount Requested

(in millions)
Filing

Date
ApprovalAdditional Information
CPUC
Rate CaseSteamNatural Gas$7127February 2020Pending
May
2019
PendingIn May 2019,February 2020, PSCo filed an unopposed Settlement Agreementa rate case with the CPUC Staff andseeking a net increase to retail gas rates of $126.8 million, reflecting a $144.5 million increase in base rate revenue, partially offset by $17.7 million of costs previously authorized through the City of Denver.Pipeline Integrity rider. The settlement reflectsrequest was based on a 9.95% ROE, of 9.67% for AFUDC purposes, an equity ratio of 56.04%55.81% and utilizationa historic test year as of tax reform benefits. FinalSept. 30, 2019, adjusted for known and measurable differences for the 12-month period ended Sept. 30, 2020. In June 2020, PSCo revised its net increase to $121 million.
In July 2020, PSCo, the CPUC Staff and various intervenors filed a comprehensive unopposed settlement, which results in a net increase to retail gas rates would be effective in October 2020, with an initial stepof $77.3 million, reflecting a $94.1 million increase in October 2019.base rate revenue, partially offset by $16.8 million of costs previously authorized through the Pipeline Integrity rider. The settlement is based on:
A ROE of 9.20%;
An equity ratio of 55.62%; and
A historic test year as of Sept. 30, 2019, utilizing a year-end rate base, and incorporating a known and measurable adjustment for the Tungsten to Black Hawk pipeline as of April 30, 2020.
Rates will be implemented on April 1, 2021 and will be retroactively effective back to November 2020. In July 2019,2020, the Administrative Law Judge recommended thatgranted an unopposed motion to schedule a hearing for Aug. 13, 2020 to review the settlement agreement be approved without modification. Settlement is pending a CPUC decision.settlement.
Rate CaseElectric$158May 2019Received
In 2019, PSCo filed a request with the CPUC seeking a net rate increase of $108.4 million, based on a requested ROE of 10.2% and an equity ratio of 55.6%.
In February 2020, the CPUC issued a written decision, resulting in an estimated $34.9 million net base rate revenue increase. The CPUC decision included a 9.3% ROE, an equity ratio of 55.61%, based on a current test year ended Aug. 31, 2019, implementation of decoupling in 2020 and other items.
In May 2020, the CPUC deliberated on PSCo’s request for rehearing and revised its prior decision on the test year calculation, return on prepaid pension and medical assets, a disallowance of a capital investment for the Comanche Unit 3 superheater and Board compensation. In July 2020, the CPUC’s written decision was received. As a result, electric rates will increase approximately $12 million, retroactive back to Feb. 25, 2020. In addition, as a part of the rehearing, the CPUC plans to discuss the merits of opening an investigation of Comanche Unit 3 performance.
Rate Case AppealNatural GasN/AApril 2019Pending
In April 2019, PSCo filed an appeal seeking judicial review of the CPUC’s prior ruling regarding PSCo’s last natural gas rate case (approved in December 2018). Appeal requestsThe appeal requested review of the following: denial of a return on the prepaid pension and retiree medical assets; the use of a capital structure that is not based on the actual historical test year level;year; and the use of an average rate base methodology rather than a year-end rate base methodology.
In March 2020, The District Court of Denver County has adopted a briefing schedule that will concluderuled in October 2019. Timeline on a final ruling is unknown at this point.favor of allowing the prepaid pension assets to be included in rate base; but it upheld the CPUC treatment of the retiree medical assets and capital structure methodology. The CPUC did not appeal the decision allowing inclusion of the prepaid pension assets in rate base.

Public Utility
PSCo 2020 Rider Filings
In July 2020, PSCo filed Wildfire and Advanced Grid rider requests with the CPUC instead of filing a comprehensive electric rate case in 2020.
Wildfire Protection RiderSeeks to establish a Wildfire Protection Rider to recover incremental costs associated with system investments to reduce wildfire risk. The rider would be effective no later than June 2021 and continue through 2025. Wildfire Protection capital additions are projected to total approximately $325 million. Forecasted annual revenue requirements from 2021 through 2025 are as follows:
(in Millions)20212022202320242025
Forecasted annual revenue requirement$17  $24  $29  $32  $34  











Advanced Grid RiderSeeks to establish an Advanced Grid Rider to recover incremental costs associated with the Advanced Grid Intelligence and Security Initiative (AGIS). The rider would be effective no later than May 2021 and continue through 2025. The PSCo portion of the AGIS initiative is projected to total approximately $850 million of capital additions. Forecasted annual revenue requirements from 2021 through 2025 are as follows:
(in Millions)20212022202320242025
Forecasted annual revenue requirement$53  $69  $83  $89  $99  
PSCo — Comanche Unit 3
PSCo is part owner of Comanche Unit 3, a 750 MW, coal-fueled electric generating unit. PSCo is the operating agent under the joint ownership agreement. In June 2020, the unit experienced loss of turbine oil during start-up which damaged the plant. It is currently anticipated that Comanche Unit 3 will recommence operations in the fourth quarter of 2020. Replacement and repair of damaged systems in excess of a $2 million deductible are expected to be recovered through insurance policies. PSCo has obtained replacement power for a portion of the unit’s output through purchase power agreements.


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Boulder Municipalization
In 2011, Boulder passed a ballot measure authorizing the formation of an electric municipal utility, subject to certain conditions. Subsequently, there have been various legal proceedings in multiple venues with jurisdiction over Boulder’s plan. In 2014, the Boulder City Council passed an ordinance to establish an electric utility. PSCo challenged the formation of this utility and the Colorado Court of Appeals ruled in PSCo’s favor, vacating a lower court decision. In June 2018, the Colorado Supreme Court rejected Boulder’s request to dismiss the case and remanded it to the Boulder District Court. The case was then settled in June 2019 after Boulder agreed to repeal the ordinance establishing the utility.
Boulder has filed multiple separation applications with the CPUC, which have been challenged by PSCo and other intervenors. In September 2017, the CPUC issued a written decision, agreeing with several key aspects of PSCo’s position. The CPUC has approved the designation of some electrical distribution assets for transfer, subject to Boulder completing certain filings.
In the fourth quarter of 2018, the Boulder City Council also adopted an Ordinance authorizing Boulder to begin negotiations for the acquisition of certain property or to otherwise condemn that property after Feb. 1, 2019. In the first quarter of 2019, Boulder sent PSCo a notice of intent to acquire certain electric distribution assets. In the third quarter of 2019, Boulder filed its condemnation litigation, which was later dismissed by the Boulder District Court in September 2019 on the grounds that Boulder had not completed the pre-requisite CPUC process and filings. Boulder is currently appealing this order. In October 2019, the CPUC approved the subsequent filings regarding asset transfers outside of substations, reaffirmed its 2017 decision on assets outside of substations and closed the CPUC proceeding.
In December 2019, Boulder filed a new condemnation action despite its ongoing appeal of the last condemnation case. PSCo subsequently filed a motion to dismiss or stay the new condemnation action. In February 2020, Boulder filed an application under section 210 of the Federal Power Act asking FERC to order PSCo to interconnect its facilities with a future Boulder municipal utility under Boulder’s preferred terms and conditions.
In July 2020, PSCo reached a settlement with certain Boulder officials that would end the city’s effort to municipalize. The settlement, if approved, would result in a 20-year franchise arrangement (with multiple opt-out conditions), an energy partnership, an undergrounding agreement and establish how the municipalization would move forward if Boulder exercised an opt-out. The settlement will require approval by the Boulder City Council in August 2020 and will further require approval by the citizens of Boulder in a ballot referendum in November 2020.
Environmental
Environmental Regulation
Except to the extent noted in Regulation above, the circumstances set forth in Public Utility Regulation included in Item 1 of PSCo’s Annual Report on Form 10-K for the year ended Dec. 31, 2018 and in Item 2 of PSCo's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2019, appropriately represent, in all material respects, the current status of public utility regulation and are incorporated by reference.
Environmental Matters
In JuneJuly 2019, the EPA issuedadopted the final ACEAffordable Clean Energy rule, which requires states to replacedevelop plans for greenhouse gas reductions from coal-fired power plants. The state plans, due to the Obama-era Clean Power Plan. The final ACE rule mayEPA in July 2022, will evaluate and potentially require implementation of heat rate improvement projectsimprovements at some of ourexisting coal-fired power plants. It is not yet known what the costs associated with the final rule might be untilhow these state plans are developed to implement the final regulation.will affect our existing coal plants, but they could require substantial additional investment, even in plants slated for retirement. PSCo believes, based on prior state commission practice, the cost of these initiatives or replacement generation would be recoverable through rates.
Item 4 — CONTROLS AND PROCEDURES
ITEM 4 — CONTROLS AND PROCEDURES
Disclosure Controls and Procedures
PSCo maintains a set of disclosure controls and procedures designed to ensure that information required to be disclosed in reports that it files or submits under the Securities Exchange Act of 1934 is recorded, processed, summarized, and reported within the time periods specified in SEC rules and forms.
In addition, the disclosure controls and procedures ensure that information required to be disclosed is accumulated and communicated to management, including the chief executive officer (CEO)CEO and chief financial officer (CFO),CFO, allowing timely decisions regarding required disclosure.
As of June 30, 2019,2020, based on an evaluation carried out under the supervision and with the participation of PSCo’s management, including the CEO and CFO, of the effectiveness of its disclosure controls and the procedures, the CEO and CFO have concluded that PSCo’s disclosure controls and procedures were effective.
Internal Control Over Financial Reporting
No changes in PSCo’s internal control over financial reporting occurred during the most recent fiscal quarter that materially affected, or are reasonably likely to materially affect, PSCo’s internal control over financial reporting.
PartPART II — OTHER INFORMATION
Item
ITEM 1Legal ProceedingsLEGAL PROCEEDINGS
PSCOPSCo is involved in various litigation matters that are being defended and handled in the ordinary course of business. AssessmentThe assessment of whether a loss is probable or is a reasonable possibility, and whether athe loss or a range of loss is estimable, often involves a series of complex judgments regardingabout future events. Management maintains accruals for losses that are probable of being incurred and subject to reasonable estimation.
Management may beis sometimes unable to estimate an amount or range of a reasonably possible loss in certain situations, including but not limited to, when (1) the damages sought are indeterminate, (2) the proceedings are in the early stages, or (3) the matters involve novel or unsettled legal theories. In such cases, there is considerable uncertainty regarding the timing or ultimate resolution of such matters, including a possible eventual loss.
For current proceedings not specifically reported herein, management does not anticipate that the ultimate liabilities, if any, would have a material effect on PSCo’s financial statements. Unless otherwise required by GAAP, legal fees are expensed as incurred.
See Note 9 to the consolidated financial statements and Part I Item 2 for further information.
Item








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ITEM 1A — RISK FACTORS
There have been no material changes from the risk factors disclosed in our Form 10-K for the year ended Dec. 31, 2019 except as follows:
We face risks related to health epidemics and other outbreaks, which may have a material effect on our financial condition, results of operations and cash flows.
The global outbreak of COVID-19 is currently impacting countries, communities, supply chains and markets. A high degree of uncertainty continues to exist regarding COVID-19, the duration and magnitude of business restrictions, re-shut downs, if any, and the level and pace of economic recovery. While we are implementing contingency plans, there are no guarantees these plans will be sufficient to offset the impact of COVID-19.
We cannot ultimately predict whether it will have a material impact on our liquidity, financial condition, or results of operations. Nor can we predict the impact of the virus on the health of our employees, our supply chain or our ability to recover higher costs associated with managing through the pandemic.
PSCo’s risk factors are documented in Item 1A of Part I of its Annual Report on Form 10-K for the year ended Dec. 31, 2018,2019, which is incorporated herein by reference. Therereference, as well as other information set forth in this report, which could have been noa material changes from the risk factors previously disclosed in the impact on our financial condition, results of operations and cash flows.Form 10-K.

Item
ITEM 6 — EXHIBITS
* Indicates incorporation by reference
+ Executive Compensation Arrangements and Benefit Plans Covering Executive Officers and Directors
Exhibit NumberDescriptionReport or Registration StatementSEC File or Registration NumberExhibit Reference
PSCo Form 10-Q for the quarter ended Sept. 30, 2017001-032803.01
PSCo Form 10-K for the year ended Dec. 31, 2018001-032803.02
Xcel Energy Inc.PSCo Form 8-K dated June 7, 2019May 15, 2020
001-03034

001-03280
99.034.01
101101.INSThe following materials from PSCo’s Quarterly Report on Form 10-Q forInline XBRL Instance Document - the quarter ended June 30, 2019instance document does not appear in the Interactive Data File because its XBRL tags are formattedembedded within the Inline XBRL document.
101.SCHInline XBRL Schema
101.CALInline XBRL Calculation
101.DEFInline XBRL Definition
101.LABInline XBRL Label
101.PREInline XBRL Presentation
104Cover Page Interactive Data File (formatted as Inline XBRL and contained in XBRL (eXtensible Business Reporting Language):  (i) the Consolidated Statements of Income, (ii) the Consolidated Statements of Comprehensive Income (iii) the Consolidated Statements of Cash Flows, (iv) the Consolidated Balance Sheets, (v) Notes to Consolidated Financial Statements, and (vi) document and entity information.Exhibit 101)

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SIGNATURES

Pursuant to the requirements 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.

Public Service Company of Colorado
July 31, 2020By:Public Service Company of Colorado
Aug. 1, 2019By:/s/ JEFFREY S. SAVAGE
Jeffrey S. Savage
Senior Vice President, Controller
(Principal Accounting Officer)
/s/ ROBERT C. FRENZELBRIAN J. VAN ABEL
Robert C. FrenzelBrian J. Van Abel
Executive Vice President, Chief Financial Officer and Director
(Principal Financial Officer)


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