Energen (EGN) 10-K 2006 FY Annual report

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM 10-K

x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE YEAR ENDED DECEMBER 31, 2006

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM            TO            

Commission File Number	Registrant	State of Incorporation	IRS Employer Identification Number
1-7810	Energen Corporation	Alabama	63-0757759
2-38960	Alabama Gas Corporation	Alabama	63-0022000

605 Richard Arrington Jr. Boulevard North, Birmingham, Alabama 35203-2707

Telephone Number 205/326-2700

http://www.energen.com

Securities Registered Pursuant to Section 12(b) of the Act:

Title of Each Class	Exchange on Which Registered
Energen Corporation Common Stock, $0.01 par value	New York Stock Exchange
Energen Corporation Preferred Stock Purchase Rights	New York Stock Exchange

Securities Registered Pursuant to Section 12(g) of the Act: NONE

Indicate by check mark if the registrants are a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  x    NO  ¨

Indicate by check mark if the registrants are not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    YES  ¨    NO  x

Indicate by a check mark whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities and Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports) and (2) have been subject to such filing requirements for the past 90 days.    YES  x    NO  ¨

Indicate by a check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (Section 229.405 of this chapter) is not contained herein and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer (as defined in Rule 12b-2 of the Act).

Energen Corporation Large accelerated filer  x    Accelerated filer  ¨    Non-accelerated filer  ¨

Alabama Gas Corporation Large accelerated filer  ¨    Accelerated filer  ¨    Non-accelerated filer  x

Indicate by check mark whether the registrants are a shell company (as defined in Rule 12b-2 of the Exchange Act).    YES  ¨    NO  x

Aggregate market value of the voting stock held by non-affiliates of the registrants as of June 30, 2006:

Energen Corporation $ 2,727,928,993

Indicate number of shares outstanding of each of the registrant’s classes of common stock as of February 5, 2007:

Energen Corporation	71,687,984 shares
Alabama Gas Corporation	1,972,052 shares

Alabama Gas Corporation meets the conditions set forth in General Instruction I(1) (a) and (b) of Form 10-K and is therefore filing this form with the reduced disclosure format pursuant to General Instruction I(2).

DOCUMENTS INCORPORATED BY REFERENCE

Energen Corporation Proxy Statement to be filed on or about March 26, 2007 (Part III, Item 10-14)

INDUSTRY GLOSSARY

For a more complete definition of certain terms defined below, please refer to Rule 4-10(a) of Regulation S-X,

promulgated pursuant to the Securities Act of 1933 and the Securities Exchange Act of 1934, each as amended.

Basis	The difference between the futures price for a commodity and the corresponding cash spot price. The differential commonly is related to factors such as product quality, location and contract pricing.
Basin-Specific	A type of derivative contract whereby the contract’s settlement price is based on specific geographic basin indices.
Behind Pipe Reserves	Oil or gas reserves located above or below the currently producing zone(s) that cannot be extracted until a recompletion or pay-add occurs.
Call Option	A contract that gives the investor the right, but not the obligation, to buy the underlying commodity at a certain price on an agreed upon date.
Carried Interest	An agreement under which one party agrees to pay for a specified portion or for all of the development and operating costs of another party on a property in which both own a portion of the working interest.
Cash Flow Hedge	The designation of a derivative instrument to reduce exposure to variability in cash flows from the forecasted sale of oil, gas or natural gas liquids production whereby the gains (losses) on the derivative transaction are anticipated to offset the losses (gains) on the forecasted sale.
Collar	A financial arrangement that effectively establishes a price range between a floor and a ceiling for the underlying commodity. The purchaser bears the risk of fluctuation between the minimum (or floor) price and the maximum (or ceiling) price.
Development Costs	Costs necessary to gain access to, prepare and equip development wells in areas of proved reserves.
Development Well	A well drilled within the proved area of an oil or gas reservoir to the depth of a stratigraphic horizon known to be productive.
Dry Well	An exploratory or a development well found to be incapable of producing either oil or gas in sufficient quantities to justify completion as an oil or gas well.
Exploration Expenses	Costs primarily associated with drilling unsuccessful exploratory wells in undeveloped properties, exploratory geological and geophysical activities, and costs of impaired and expired leaseholds.
Exploratory Well	A well drilled to find and produce oil or gas in an unproved area, to find a new reservoir in a field previously found to be productive of oil or gas in another reservoir, or to extend a known reservoir.
Futures Contract	An exchange-traded legal contract to buy or sell a standard quantity and quality of a commodity at a specified future date and price. Such contracts offer liquidity and minimal credit risk exposure but lack the flexibility of swap contracts.
Hedging	The use of derivative commodity instruments such as futures, swaps and collars to help reduce financial exposure to commodity price volatility.
Gross Revenues	Revenues reported after deduction of royalty interest payments.
Gross Well or Acre	A well or acre in which a working interest is owned.
Liquified Natural Gas (LNG)	Natural gas that is liquified by reducing the temperature to negative 260 degrees Fahrenheit. LNG typically is used to supplement traditional natural gas supplies during periods of peak demand.
Long-Lived Reserves	Reserves generally considered to have a productive life of approximately 10 years or more, as measured by the reserves-to-production ratio.
Natural Gas Liquids (NGL)	Liquid hydrocarbons that are extracted and separated from the natural gas stream. NGL products include ethane, propane, butane, natural gasoline and other hydrocarbons.
Net Well or Acre	A net well or acre is deemed to exist when the sum of fractional ownership working interests in gross wells or acres equals one.

Odorization	The adding of odorant to natural gas which is a characteristic odor so that leaks can be readily detected by smell.
Operational Enhancement	Any action undertaken to improve production efficiency of oil and gas wells and/or reduce well costs.
Operator	The company responsible for exploration, development and production activities for a specific project.
Pay-Add	An operation within a currently producing wellbore that attempts to access and complete an additional pay zone(s) while maintaining production from the existing completed zone(s).
Pay Zone	The formation from which oil and gas is produced.
Production (Lifting) Costs	Costs incurred to operate and maintain wells.
Productive Well	An exploratory or a development well that is not a dry well.
Proved Developed Reserves	The portion of proved reserves which can be expected to be recovered through existing wells with existing equipment and operating methods.
Proved Reserves	Estimated quantities of crude oil, natural gas and natural gas liquids that geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions.
Proved Undeveloped Reserves (PUD)	The portion of proved reserves which can be expected to be recovered from new wells on undrilled proved acreage or from existing wells where a relatively major expenditure is required for completion.
Put Option	A contract that gives the purchaser the right, but not the obligation, to sell the underlying commodity at a certain price on an agreed date.
Recompletion	An operation within an existing wellbore whereby a completion in one pay zone is abandoned in order to attempt a completion in a different pay zone.
Reserves-to- Production Ratio	Ratio expressing years of supply determined by dividing the remaining recoverable reserves at year end by actual annual production volumes. The reserve-to-production ratio is a statistical indicator with certain limitations, including predictive value. The ratio varies over time as changes occur in production levels and remaining recoverable reserves.
Secondary Recovery	The process of injecting water, gas, etc., into a formation in order to produce additional oil otherwise unobtainable by initial recovery efforts.
Swap	A contractual arrangement in which two parties, called counterparties, effectively agree to exchange or “swap” variable and fixed rate payment streams based on a specified commodity volume. The contracts allow for flexible terms such as specific quantities, settlement dates and location but also expose the parties to counterparty credit risk.
Transportation	Moving gas through pipelines on a contract basis for others.
Throughput	Total volumes of natural gas sold or transported by the gas utility.
Working Interest	Ownership interest in the oil and gas properties that is burdened with the cost of development and operation of the property.
Workover	A major remedial operation on a completed well to restore, maintain, or improve the well’s production such as deepening the well or plugging back to produce from a shallow formation.
-e	Following a unit of measure denotes that the oil and natural gas liquids components have been converted to cubic feet equivalents at a rate of 6 thousand cubic feet per barrel.

ENERGEN CORPORATION

2006 FORM 10-K ANNUAL REPORT

TABLE OF CONTENTS

		Page
	PART I
Item 1.	Business	4
Item 1A.	Risk Factors	11
Item 1B.	Unresolved Staff Comments	12
Item 2.	Properties	13
Item 3.	Legal Proceedings	13
Item 4.	Submission of Matters to a Vote of Security Holders	14
	PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	17
Item 6.	Selected Financial Data	19
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	21
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	34
Item 8.	Financial Statements and Supplementary Data	35
Item 9.	Changes in and Disagreements With Accountants on Accounting and Financial Disclosure	81
Item 9A.	Controls and Procedures	81
	PART III
Item 10.	Directors, Executive Officers and Corporate Governance	83
Item 11.	Executive Compensation	83
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	83
Item 13.	Certain Relationships and Related Transactions, and Director Independence	83
Item 14.	Principal Accountant Fees and Services	83
	PART IV
Item 15.	Exhibits and Financial Statement Schedules	84
Signatures		89

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This Form 10-K is filed on behalf of Energen Corporation (Energen or the Company)

and Alabama Gas Corporation (Alagasco).

Forward-Looking Statements:Certain statements in this report express expectations of future plans, objectives and performance of the Company and its subsidiaries and constitute forward-looking statements made pursuant to the Safe Harbor provision of the Private Securities Litigation Reform Act of 1995. Except as otherwise disclosed, the forward-looking statements do not reflect the impact of possible or pending acquisition, investments, divestitures or restructurings. The absence of errors in input data, calculations and formulas used in estimates, assumptions and forecasts cannot be guaranteed. Neither the Company nor Alagasco undertakes any obligation to correct or update any forward-looking statements whether as a result of new information, future events or otherwise.

All statements based on future expectations rather than on historical facts are forward-looking statements that are dependent on certain events, risks and uncertainties that could cause actual results to differ materially from those anticipated. Some of these include, but are not limited to, economic and competitive conditions, inflation rates, legislative and regulatory changes, financial market conditions, our ability to access the capital markets, future business decisions, utility customer growth and retention and usage per customer, litigation results and other uncertainties, all of which are difficult to predict.

Third Party Facilities: The forward-looking statements also assume generally uninterrupted access to third party oil and gas gathering, transportation, processing and storage facilities. Energen Resources Corporation, the Company’s oil and gas subsidiary, relies upon such facilities for access to markets for its production. Alagasco relies upon such facilities for access to natural gas supplies. Such facilities are typically limited in number and geographically concentrated. An extended interruption of access to or service from these facilities, whether caused by weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could result in material adverse financial consequences to Alagasco, Energen Resources and/or the Company.

Energen Resources’ Production: There are numerous uncertainties inherent in estimating quantities of proved oil and gas reserves and in projecting future rates of production and timing of development expenditures. The total amount or timing of actual future production may vary significantly from reserve and production estimates. In the event Energen Resources is unable to fully invest its planned acquisition, development and exploratory expenditures, future operating revenues, production, and proved reserves could be negatively affected. The drilling of development and exploratory wells can involve significant risks, including those related to timing, success rates and cost overruns, and these risks can be affected by lease and rig availability, complex geology and other factors.

Energen Resources’ Hedging: Although Energen Resources makes use of futures, swaps, options and fixed-price contracts to mitigate price risk, fluctuations in future oil, gas and natural gas liquids prices could materially affect the Company’s financial position, results of operations and cash flows; furthermore, such risk mitigation activities may cause the Company’s financial position and results of operations to be materially different from results that would have been obtained had such risk mitigation activities not occurred. The effectiveness of such risk mitigation assumes that counterparties maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that actual sales volumes will generally meet or exceed the volumes subject to the futures, swaps, options and fixed-price contracts. A substantial failure to meet sales volume targets, whether caused by miscalculations, weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could leave Energen Resources financially exposed to its counterparties and result in material adverse financial consequences to Energen Resources and the Company. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Energen Resources’ position.

Alagasco’s Hedging: Similarly, although Alagasco makes use of futures, swaps and fixed-price contracts to mitigate gas supply cost risk, fluctuations in future gas supply costs could materially affect its financial position and rates to customers. The effectiveness of Alagasco’s risk mitigation assumes that its counterparties in such activities maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that Alagasco’s actual gas supply needs will generally meet or exceed the volumes subject to the futures, swaps and

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fixed-price contracts. A substantial failure to experience projected gas supply needs, whether caused by miscalculations, weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could leave Alagasco financially exposed to its counterparties and result in material adverse financial consequences to Alagasco and the Company. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Alagasco’s position.

Operations: Inherent in the gas distribution activities of Alagasco and the oil and gas production activities of Energen Resources are a variety of hazards and operation risks, such as leaks, explosions and mechanical problems that could cause substantial financial losses. In addition, these risks could result in loss of human life, significant damage to property, environmental pollution, impairment of our operations and substantial losses to the Company. In accordance with customary industry practices, the Company maintains insurance against some, but not all, of these risks and losses. The location of pipeline and storage facilities near populated areas, including residential areas, commercial business centers and industrial sites, could increase the level of damages resulting from these risks. The occurrence of any of these events could adversely affect Alagasco’s, Energen Resources’ and/or the Company’s financial position, results of operations and cash flows.

Alagasco’s Service Territory: Alagasco’s utility customers are geographically concentrated in central and north Alabama. Significant economic, weather, natural disaster, criminal act or other events that adversely affect this region could adversely affect Alagasco and the Company.

PART I

ITEM 1. BUSINESS

General

Energen Corporation, based in Birmingham, Alabama, is a diversified energy holding company engaged primarily in the development, acquisition, exploration and production of oil, natural gas and natural gas liquids in the continental United States and in the purchase, distribution and sale of natural gas, principally in central and north Alabama. Its two principal subsidiaries are Energen Resources Corporation and Alabama Gas Corporation (Alagasco).

Energen was incorporated in Alabama in 1978. Alagasco was formed in 1948 by the merger of Alabama Gas Company into Birmingham Gas Company, the predecessors of which had been in existence since the mid-1800s. Alagasco became a public company in 1953. Energen Resources was formed in 1971 as a subsidiary of Alagasco and became a subsidiary of Energen in a 1979 reorganization.

The Company maintains a Web site with the addresswww.energen.com. The Company does not include the information contained on its Web site as part of this report nor is the information incorporated by reference into this report. The Company makes available free of charge through its Web site the annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to these reports. Also, these reports are available in print upon shareholder request. These reports are available as soon as reasonably practicable after being electronically filed with or furnished to the Securities and Exchange Commission. The Company’s Web site also includes its Code of Ethics, Corporate Governance Guidelines, Audit Committee Charter, Officers’ Review Committee Charter, Governance and Nominations Committee Charter and Finance Committee Charter, each of which is available in print upon shareholder request.

Financial Information About Industry Segments

The information required by this item is provided in Note 20, Industry Segment Information, in the Notes to Financial Statements.

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Narrative Description of Business

• Oil and Gas Operations

General: Energen’s oil and gas operations focus on increasing production and adding proved reserves through the development and acquisition of oil and gas properties. To a lesser extent, Energen Resources explores for and develops new reservoirs, primarily in areas in which it has an operating presence. All gas, oil and natural gas liquids production is sold to third parties. Energen Resources also provides operating services in the Black Warrior, San Juan and Permian basins for its joint interest and third parties. These services include overall project management and day-to-day decision-making relative to project operations.

At the end of 2006, Energen Resources’ proved oil and gas reserves totaled 1,723 billion cubic feet equivalent (Bcfe). Substantially all of these reserves are located in the San Juan Basin in New Mexico and Colorado, the Permian Basin in west Texas and the Black Warrior Basin in Alabama. Approximately 79 percent of Energen Resources’ year-end reserves are proved developed reserves. Energen Resources’ reserves are long-lived, with a year-end reserves-to-production ratio of 18 years. Natural gas represents approximately 64 percent of Energen Resources’ proved reserves, with oil representing approximately 26 percent and natural gas liquids comprising the balance.

Growth Strategy: Energen has operated for more than ten years under a strategy to grow its oil and gas operations. Since the end of fiscal year 1995, Energen Resources has invested approximately $1.2 billion in property acquisitions, $1 billion in related development, and $168 million in exploration and related development. Energen Resources’ capital investment over the three-year period ending December 31, 2009, is currently expected to approximate $660 million. The Company also may allocate additional capital during this three-year period for other oil and gas activities such as property acquisitions and the exploration and development of potential shale plays primarily in Alabama. The estimates above do not include amounts for capital related to potential acquisitions or development of these shale plays discussed below.

Energen Resources will consider onshore North American property acquisitions which offer proved undeveloped and/or behind-pipe reserves as well as operational enhancement potential. Energen Resources prefers properties with long-lived reserves and multiple pay-zone opportunities; however, Energen Resources will consider acquisitions of other types of properties which meet its investment requirements, including acquisitions with limited unproved properties. In addition, Energen Resources may conduct limited exploration activities primarily in areas in which it has operations and remains open to considering exploration activities which complement its core expertise and meet its investment requirements. Following an acquisition, Energen Resources focuses on increasing production and reserves through development of the properties’ proved undeveloped reserves and behind-pipe reserve potential as well as engaging in other activities. These activities include development well drilling, limited exploration, behind-pipe recompletions, pay-adds, workovers, secondary recovery and operational enhancements. Energen Resources prefers to operate its properties in order to better control the nature and pace of development activities.

In October 2006, Energen Resources sold to Chesapeake Energy Corporation (Chesapeake) a 50 percent interest in its lease position of approximately 200,000 acres in various shale plays in Alabama for $75 million. In addition, the two companies signed an agreement to form an area of mutual interest through which they will pursue new leases, exploration, development and operations on a 50-50 basis, for at least the next 10 years. Chesapeake will also pay for Energen Resources’ first $15 million of future drilling costs.

Energen Resources’ development activities can result in the addition of new proved reserves and can serve to reclassify proved undeveloped reserves to proved developed reserves. Proved reserve disclosures are provided annually, although changes to reserve classifications occur throughout the year. Accordingly, additions of new reserves from development activities can occur throughout the year and may result from numerous factors including, but not limited to, regulatory approvals for drilling unit downspacing that increase the number of available drilling locations; changes in the economic or operating environments that allow previously uneconomic locations to be added; technological advances that make reserve locations available for development; successful development of existing proved undeveloped reserve locations that reclassify adjacent

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probable locations to proved undeveloped reserve locations; increased knowledge of field geology and engineering parameters relative to oil and gas reservoirs; and changes in management’s intent to develop certain opportunities.

During the three years ended December 31, 2006, the Company’s development efforts have added 307 Bcfe of proved reserves from the drilling of 891 gross development wells and 227 well recompletions and pay-adds. In 2006, Energen Resources’ successful development wells and other activities added approximately 147 Bcfe of proved reserves; the company drilled 309 gross development wells, performed some 39 well recompletions and pay-adds, and conducted other operational enhancements. Energen Resources’ production from continuing operations totaled 95.6 Bcfe in 2006 and is estimated to total 95 Bcfe in 2007, including 93.5 Bcfe of estimated production from proved reserves owned at December 31, 2006.

Drilling Activity:The following table sets forth the total number of net productive and dry exploratory and development wells drilled:

Years ended December 31,	2006	2005	2004
Development:
Productive	151.7	153.9	145.5
Dry	—	1.7	1.0
Total	151.7	155.6	146.5
Exploratory:
Productive	40.1	4.1	7.5
Dry	3.0	—	0.4
Total	43.1	4.1	7.9

As of December 31, 2006, the Company was participating in the drilling of 7 gross development wells, with the Company’s interest equivalent to 4.4 wells. In addition to the development wells drilled, the Company drilled 35.9, 33 and 45.9 net service wells during 2006, 2005 and 2004, respectively. As of December 31, 2006, the Company was participating in the drilling of 2 gross service wells, with the Company’s interest equivalent to 1.9 wells.

Productive Wells and Acreage: The following table sets forth the total gross and net productive gas and oil wells as of December 31, 2006, and developed and undeveloped acreage as of the latest practicable date prior to year-end:

	Gross	Net
Gas wells	3,943	2,228
Oil wells	2,828	1,502
Developed acreage	817,804	573,049
Undeveloped acreage	126,781	114,433

There were 27 wells with multiple completions in 2006. All wells and acreage are located onshore in the United States, with the majority of the net undeveloped acreage located in Alabama.

Risk Management:Energen Resources attempts to lower the risks associated with its oil and natural gas business. Energen Resources does not hedge more than 80 percent of its estimated annual production and generally does not hedge more than two fiscal years forward. Statement of Financial Accounting Standards (SFAS) No. 133, “Accounting for Derivative Instruments and Hedging Activities,” as amended requires all derivatives to be recognized on the balance sheet and measured at fair value. If a derivative is designated as a cash flow hedge, the effectiveness of the hedge, or the degree that the gain (loss) for the hedging instrument offsets the loss (gain) on the hedged item, is measured at each reporting period. The effective portion of the gain or loss on the derivative instrument is recognized in other comprehensive income as a component of equity and subsequently reclassified into earnings when the forecasted transaction affects earnings. The ineffective portion of a derivative’s change in fair value is required to be recognized in earnings immediately. Derivatives that do not qualify for hedge treatment under SFAS No. 133 must be recorded at fair value with gains or losses recognized in operating revenues in the period of change.

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The Company from time to time enters into derivative transactions that do not qualify for cash flow hedge accounting but are considered by management to represent valid economic hedges and are accounted for as mark-to-market transactions. These economic hedges may include, but are not limited to, put options and swaps on non-operated or other properties for which all of the necessary information to qualify for cash flow hedge accounting is either not readily available or subject to change.

In the case of an acquisition, Energen Resources may hedge more than two years forward to protect targeted returns. Energen Resources prefers long-lived reserves and primarily uses the then-current oil and gas futures prices in its evaluation models, the prevailing swap curve and, for the longer-term, its own pricing assumptions.

See the Forward-Looking Statements in Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations, and Item 1A, Risk Factors, for further discussion with respect to price and other risks.

• Natural Gas Distribution

General: Alagasco is the largest natural gas distribution utility in the state of Alabama. Alagasco purchases natural gas through interstate and intrastate marketers and suppliers and distributes the purchased gas through its distribution facilities for sale to residential, commercial and industrial customers and other end-users of natural gas. Alagasco also provides transportation services to industrial and commercial customers located on its distribution system. These transportation customers, using Alagasco as their agent or acting on their own, purchase gas directly from producers, marketers or suppliers and arrange for delivery of the gas into the Alagasco distribution system. Alagasco charges a fee to transport such customer-owned gas through its distribution system to the customers’ facilities.

Alagasco’s service territory is located in central and parts of north Alabama and includes 178 cities and communities in 28 counties. The aggregate population of the counties served by Alagasco is estimated to be 2.4 million. Among the cities served by Alagasco are Birmingham, the center of the largest metropolitan area in Alabama, and Montgomery, the state capital. During 2006, Alagasco served an average of 420,558 residential customers and 34,456 commercial, industrial and transportation customers. The Alagasco distribution system includes approximately 10,100 miles of main and more than 11,800 miles of service lines, odorization and regulation facilities, and customer meters.

APSC Regulation:As an Alabama utility, Alagasco is subject to regulation by the Alabama Public Service Commission (APSC) which established the Rate Stabilization and Equalization (RSE) rate-setting process in 1983. RSE was extended in 2002, 1996, 1990, 1987 and 1985. On June 10, 2002, the APSC extended RSE for a six-year period through January 1, 2008. Under the APSC order, Alagasco’s allowed range of return on average equity remains 13.15 percent to 13.65 percent throughout the term of the order, subject to change in the event that the Commission, following a generic rate of return hearing, adjusts the returns on equity of all major energy utilities operating under a similar methodology. Alagasco is on a September 30 fiscal year for rate-setting purposes (rate year).

Under RSE, the APSC conducts quarterly reviews to determine, based on Alagasco’s projections and year-to-date performance, whether Alagasco’s return on average equity at the end of the rate year will be within the allowed range. Reductions in rates can be made quarterly to bring the projected return within the allowed range; increases, however, are allowed only once each rate year, effective December 1, and cannot exceed 4 percent of prior-year revenues. RSE limits the utility’s equity upon which a return is permitted to 60 percent of total capitalization and provides for certain cost control measures designed to monitor Alagasco’s operations and maintenance (O&M) expense. Under the inflation-based cost control measurement established by the APSC, if the percentage change in O&M expense per customer falls within a range of 1.25 points above or below the percentage change in the Consumer Price Index For All Urban Consumers (index range), no adjustment is required. If the change in O&M expense per customer exceeds the index range, three-quarters of the difference is returned to customers. To the extent the change is less than the index range, the utility benefits by one-half of the difference through future rate adjustments.

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The temperature adjustment rider to Alagasco’s rate tariff, approved by the APSC in 1990, was designed to mitigate the earnings impact of variances from normal temperatures. Alagasco calculates a temperature adjustment to customers’ monthly bills to substantially remove the effect of departures from normal temperatures on Alagasco’s earnings. This adjustment, however, is subject to certain limitations including regulatory limits on adjustments to increase customers’ bills. Other non-temperature weather conditions that may affect customer usage are not included such as the impact of wind velocity or cloud cover and the impact of any elasticity of demand as a result of high commodity prices. Adjustments to customers’ bills are made in the same billing cycle in which the weather variation occurs. Substantially all the customers to whom the temperature adjustment applies are residential, small commercial and small industrial. Alagasco’s rate schedules for natural gas distribution charges contain a Gas Supply Adjustment (GSA) rider that permits the pass-through to customers of changes in the cost of gas supply.

The APSC approved an Enhanced Stability Reserve (ESR) beginning October 1997, with an approved maximum funding level of $4 million, to which Alagasco may charge the full amount of: (1) extraordinary O&M expenses resulting fromforce majeure events such as storms, severe weather, and outages, when one or a combination of two such events results in more than $200,000 of additional O&M expense during a rate year; or (2) individual industrial and commercial customer revenue losses that exceed $250,000 during the rate year, if such losses cause Alagasco’s return on equity to fall below 13.15 percent. Following a year in which a charge against the ESR is made, the APSC provides for accretions to the ESR in an amount of no more than $40,000 monthly until the maximum funding level is achieved.

Gas Supply: Alagasco’s distribution system is connected to two major interstate natural gas pipeline systems, Southern Natural Gas Company (Southern) and Transcontinental Gas Pipe Line Company (Transco). It is also connected to several intrastate natural gas pipeline systems and to Alagasco’s two liquified natural gas (LNG) facilities.

Alagasco purchases natural gas from various natural gas producers and marketers. Certain volumes are purchased under firm contractual commitments with other volumes purchased on a spot market basis. The purchased volumes are delivered to Alagasco’s system using a variety of firm transportation, interruptible transportation and storage capacity arrangements designed to meet the system’s varying levels of demand. Alagasco’s LNG facilities can provide the system with up to 200,000 additional thousand cubic feet per day (Mcfd) of natural gas to meet peak day demand.

As of December 31, 2006, Alagasco had the following contracts in place for firm natural gas pipeline transportation and storage services:

	December 31, 2006
	(Mcfd)
Southern firm transportation	152,933
Southern storage and no notice transportation	251,679
Transco firm transportation	70,000
Various intrastate transportation	20,240

Competition and Rate Flexibility:The price of natural gas is a significant competitive factor in Alagasco’s service territory, particularly among large commercial and industrial transportation customers. Propane, coal and fuel oil are readily available, and many industrial customers have the capability to switch to alternate fuels and/or alternate sources of gas. In the residential and small commercial and industrial markets, electricity is the principal competitor. With the support of the APSC, Alagasco has implemented a variety of flexible rate strategies to help it compete for the large customer gas load in the marketplace. Rate flexibility remains critical as the utility faces competition for this load. To date, the utility has been effective in utilizing its flexible rate strategies to minimize bypass and price-based switching to alternate fuels and alternate sources of gas.

8

In 1994 Alagasco implemented the P Rate in response to the competitive challenge of interstate pipeline capacity release. Under this tariff provision, Alagasco releases much of its excess pipeline capacity and repurchases it as agent for its transportation customers under 12 month contracts. The transportation customers benefit from lower pipeline costs; Alagasco’s core market customers benefit, as well, since the utility uses the revenues received from the P Rate to decrease gas costs for its residential and its small commercial and industrial customers. In 2006, approximately 300 of Alagasco’s transportation customers utilized the P Rate, and the resulting reduction in core market gas costs totaled more than $7.8 million.

The Competitive Fuel Clause (CFC) and Transportation Tariff also have been important to Alagasco’s ability to compete effectively for customer load in its service territory. The CFC allows Alagasco to adjust large customer rates on a case-by-case basis to compete with alternate fuels and alternate sources of gas. The GSA rider to Alagasco’s tariff allows the Company to recover a reduction in charges allowed under the CFC because the retention of any customer, particularly large commercial and industrial transportation customers, benefits all customers by recovering a portion of the system’s fixed costs. The Transportation Tariff allows Alagasco to transport gas for customers, rather than buy and resell it to them, and is based on Alagasco’s sales profit margin so that operating margins are unaffected. During 2006 substantially all of Alagasco’s large commercial and industrial customer deliveries were the transportation of customer-owned gas. In addition, Alagasco served as gas purchasing agent for more than 99 percent of its transportation customers. Alagasco also uses long-term special contracts as a vehicle for retaining large customer load. At the end of 2006, 66 of the utility’s largest commercial and industrial transportation customers were under special contracts of varying lengths.

Natural gas service available to Alagasco customers falls into two broad categories: interruptible and firm. Interruptible service contractually is subject to interruption by Alagasco for various reasons; the most common occurrence is curtailment of industrial customers during periods of peak core market heating demand. Interruptible service typically is provided to large commercial and industrial transportation customers who can reduce their gas consumption by adjusting production schedules or by switching to alternate fuels for the duration of the service interruption. More expensive firm service, on the other hand, generally is not subject to interruption and is provided to residential and to small commercial and industrial customers; these core market customers depend on natural gas primarily for space heating.

Growth: Customer growth presents a major challenge for Alagasco, given its mature, slow-growth service area. In 2006, Alagasco’s average number of customers decreased 1 percent. Alagasco will continue to concentrate on maintaining its current penetration levels in the residential new construction market and generating additional revenue in the small and large commercial and industrial market segments.

Seasonality:Alagasco’s gas distribution business is highly seasonal since a material portion of the utility’s total sales and delivery volumes is to space heating customers. Alagasco’s rate tariff includes a temperature adjustment rider primarily for residential, small commercial and small industrial customers that substantially mitigates the effect of departures from normal temperatures on Alagasco’s earnings. The calculation is performed monthly, and adjustments are made to customers’ bills in the actual month the weather variation occurs.

• Environmental Matters

Various environmental laws and regulations apply to the operations of Energen Resources and Alagasco. Historically, the cost of environmental compliance has not materially affected the Company’s financial position, results of operations or cash flows and is not expected to do so in the future; however, new regulations, enforcement policies, claims for damages or other events could result in significant unanticipated costs.

A discussion of certain litigation against Energen Resources in the state of Louisiana related to the restoration of oil field properties is included in Item 3. Legal Proceedings of Part I in this Form 10-K.

Alagasco is in the chain of title of nine former manufactured gas plant sites (four of which it still owns) and five manufactured gas distribution sites (one of which it still owns). An investigation of the sites does not indicate the present need for remediation activities. Management expects that, should remediation of any such sites be required in the future, Alagasco’s share, if any, of such costs will not materially affect the Company’s financial position.

9

• Employees

The Company has approximately 1,530 employees, of which Alagasco employs 1,190 and Energen Resources employs 340. The Company believes that its relations with employees are good.

10

ITEM 1A. RISK FACTORS

Third Party Facilities: Energen Resources delivers to and Alagasco is served by third party facilities. These facilities include third party oil and gas gathering, transportation, processing and storage facilities. Energen Resources relies upon such facilities for access to markets for its production. Alagasco relies upon such facilities for access to natural gas supplies. Such facilities are typically limited in number and geographically concentrated. An extended interruption of access to or service from these facilities, whether caused by weather events, natural disaster, accident, mechanical failure, criminal act or otherwise could result in material adverse financial consequences to Alagasco, Energen Resources and/or the Company.

Energen Resources’ Production: There are numerous uncertainties inherent in estimating quantities of proved oil and gas reserves and in projecting future rates of production and timing of development expenditures. The total amount or timing of actual future production may vary significantly from reserve and production estimates. In the event Energen Resources is unable to fully invest its planned development, acquisition and exploratory expenditures, future operating revenues, production, and proved reserves could be negatively affected. The drilling of development and exploratory wells can involve significant risks, including those related to timing, success rates and cost overruns, and these risks can be affected by lease and rig availability, complex geology and other factors.

Energen Resources’ Hedging: Although Energen Resources makes use of futures, swaps, options and fixed-price contracts to mitigate price risk, fluctuations in future oil, gas and natural gas liquids prices could materially affect the Company’s financial position, results of operations and cash flows; furthermore, such risk mitigation activities may cause the Company’s financial position and results of operations to be materially different from results that would have been obtained had such risk mitigation activities not occurred. The effectiveness of such risk mitigation assumes that counterparties maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that actual sales volumes will generally meet or exceed the volumes subject to the futures, swaps, options and fixed-price contracts. A substantial failure to meet sales volume targets, whether caused by miscalculations, weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could leave Energen Resources financially exposed to its counterparties and result in material adverse financial consequences to Energen Resources and the Company. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Energen Resources’ position.

Alagasco’s Hedging:Similarly, although Alagasco makes use of futures, swaps and fixed-price contracts to mitigate gas supply cost risk, fluctuations in future gas supply costs could materially affect its financial position and rates to customers. The effectiveness of Alagasco’s risk mitigation assumes that its counterparties in such activities maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that Alagasco’s actual gas supply needs will generally meet or exceed the volumes subject to the futures, swaps and fixed-price contracts. A substantial failure to experience projected gas supply needs, whether caused by miscalculations, weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could leave Alagasco financially exposed to its counterparties and result in material adverse financial consequences to Alagasco and the Company. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Alagasco’s position.

Operations: Inherent in the gas distribution activities of Alagasco and the oil and gas production activities of Energen Resources are a variety of hazards and operation risks, such as leaks, explosions and mechanical problems that could cause substantial financial losses. In addition, these risks could result in loss of human life, significant damage to property, environmental pollution, impairment of operations and substantial losses to the Company. In accordance with customary industry practices, the Company maintains insurance against some, but not all, of these risks and losses. The location of pipeline and storage facilities near populated areas, including residential areas, commercial business centers and industrial sites, could increase the level of damages resulting from these risks. The occurrence of any of these events could adversely affect Alagasco’s, Energen Resources’ and/or the Company’s financial position, results of operations and cash flows.

11

Energen Resources Customer Concentration: Revenues and related accounts receivable from oil and gas operations primarily are generated from the sale of produced natural gas and oil to energy marketing companies. Such sales are typically made on an unsecured credit basis with payment due the month following delivery. This concentration of sales to the energy marketing industry has the potential to affect the Company’s overall exposure to credit risk, either positively or negatively, in that the Company’s oil and gas purchasers may be affected similarly by changes in economic, industry or other conditions. Energen Resources considers the credit quality of its customers and, in certain instances, may require credit assurances such as a deposit, letter of credit or parent guarantee. The three largest oil and gas purchasers account for approximately 34 percent, 13 percent and 11 percent, respectively, of Energen Resources’ estimated 2007 production. Energen Resources’ other purchasers each bought less than 9 percent of production.

Alagasco’s Service Territory: Alagasco’s utility customers are geographically concentrated in central and north Alabama. Significant economic, weather, natural disaster, criminal act or other events that adversely affect this region could adversely affect Alagasco and the Company.

Access to Credit Markets: The Company and its subsidiaries rely on access to credit markets. The availability and cost of credit market access is significantly influenced by rating agency evaluations of the Company and of Alagasco.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None

12

ITEM 2. PROPERTIES

The corporate headquarters of Energen, Alagasco and Energen Resources are located in leased office space in Birmingham, Alabama. Energen Resources maintains offices in Midland, Lehman, Seminole, Westbrook and Penwell, Texas; in Farmington, New Mexico; in Brookwood and Tuscaloosa, Alabama; and in Arcadia, Louisiana. For a description of Energen Resources’ oil and gas properties, see the discussion under Item 1-Business. Information concerning Energen Resources’ production and reserves is summarized in the table below and included in Note 19, Oil and Gas Operations (Unaudited), in the Notes to Financial Statements.

	Year Ended December 31, 2006	December 31, 2006
	Production Volumes (MMcfe)	Proved Reserves (MMcfe)
San Juan Basin	44,845	919,862
Permian Basin	27,181	496,959
Black Warrior Basin	15,010	231,314
North Louisiana/East Texas	8,094	69,464
Other	465	5,212
Total	95,595	1,722,811

The properties of Alagasco consist primarily of its gas distribution system, which includes approximately 10,100 miles of main and more than 11,800 miles of service lines, odorization and regulation facilities, and customer meters. Alagasco also has two LNG facilities, four division commercial offices, three division business centers, two payment centers, three district offices, seven service centers, and other related property and equipment, some of which are leased by Alagasco.

ITEM 3. LEGAL PROCEEDINGS

Energen and its affiliates are, from time to time, parties to various pending or threatened legal proceedings. Certain of these lawsuits include claims for punitive damages in addition to other specific relief. Based upon information presently available, and in light of available legal and other defenses, contingent liabilities arising from threatened and pending litigation are not considered material in relation to the respective financial positions of Energen and its affiliates. It should be noted, however, that Energen and its affiliates conduct business in Alabama and other jurisdictions in which the magnitude and frequency of punitive or other damage awards may bear little or no relation to culpability or actual damages, thus making it difficult to predict litigation results.

Jefferson County, Alabama

In January 2006, RGGS Land and Minerals LTD, L.P. (RGGS) filed a lawsuit in Jefferson County, Alabama, alleging breach of contract with respect to Energen Resources’ calculation of certain allowed costs and failure to pay in a timely manner certain amounts due RGGS under a mineral lease. RGGS seeks a declaratory judgment with respect to the parties’ rights under the lease, reformation of the lease, monetary damages and termination of Energen Resources’ rights under the lease. The Occluded Gas Lease dated January 1, 1986 was originally between Energen Resources and United States Steel Corporation (U.S. Steel) as lessor. RGGS became the lessor under the lease as a result of a 2004 conveyance from U.S. Steel to RGGS. Approximately 120,000 acres in Jefferson and Tuscaloosa counties, Alabama, are subject to the lease. Separately on February 6, 2006, Energen Resources received notice of immediate lease termination from RGGS. During 2006, Energen Resources’ production associated with the lease was approximately 10 Bcf.

RGGS has adopted positions contrary to the seventeen years of course of dealing between Energen Resources and its original contracting partner, U.S. Steel. The Company believes that RGGS’ assertions are without merit and that the notice of lease termination is ineffective. Energen Resources intends to vigorously defend its rights under the lease. The Company remains in possession of the lease, believes that the likelihood of a judgment in favor of RGGS is remote, and has made no accrual with respect to the litigation or purported lease termination.

13

Enron Corporation

Enron and Enron North America Corporation (ENA) have settled with Energen Resources and Alagasco related to the Enron and ENA bankruptcy proceedings. Under the settlement, Energen Resources was allowed claims in the bankruptcy cases against Enron and ENA of $12.5 million each. In December 2006, Energen Resources sold its claims against Enron and ENA for a gain of $6.7 million after-tax. All other claims have been released.

Legacy Litigation

During recent years, numerous lawsuits have been filed against oil production companies in Louisiana for restoration of oilfield properties. These suits are referred to in the industry as “legacy litigation” because they usually involve operations that were conducted on the affected properties many years earlier. Energen Resources is or has been a party to several legacy litigation lawsuits, most of which result from the operations of predecessor companies. Based upon information presently available, and in light of available legal and other defenses, contingent liabilities arising from legacy litigation in excess of the Company’s accrued provision for estimated liability are not considered material to the Company’s financial position.

Other

Various other pending or threatened legal proceedings are in progress currently and the Company has accrued a provision for the estimated liability.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

No matters were submitted to a vote of security holders during the fourth quarter of 2006.

14

EXECUTIVE OFFICERS OF THE REGISTRANTS

Energen Corporation

Name	Age	Position (1)
Wm. Michael Warren, Jr.	59	Chairman of the Board and Chief Executive Officer (2)
James T. McManus, II	48	President and Chief Operating Officer of Energen, President of Energen Resources (3)
Charles W. Porter, Jr.	42	Vice President, Chief Financial Officer and Treasurer (4)
Dudley C. Reynolds	54	President and Chief Operating Officer of Alagasco (5)
John S. Richardson	49	Executive Vice President and Chief Operating Officer of Energen Resources (6)
Grace B. Carr	51	Vice President and Controller (7)
J. David Woodruff, Jr.	50	General Counsel and Secretary and Vice President-Corporate Development (8)

Notes: (1)    All executive officers of Energen have been employed by Energen or a subsidiary for the past five years. Officers serve at the pleasure of the Board of Directors. (2)    Mr. Warren has been employed by the Company in various capacities since 1983. In January 1992 he was elected President and Chief Operating Officer of Energen and all of its subsidiaries, in October 1995 he was elected Chief Executive Officer of Alagasco and Energen Resources, in February 1997 he was elected Chief Executive Officer of Energen and, effective January 1, 1998, he was elected Chairman of the Board of Energen and each of its subsidiaries. Mr. Warren serves as a Director of Energen and each of its subsidiaries. He is also a Director of Protective Life Corporation. (3)    Mr. McManus has been employed by the Company in various capacities since 1986. He was elected Executive Vice President and Chief Operating Officer of Energen Resources in October 1995 and President of Energen Resources in April 1997. He was elected President and Chief Operating Officer of Energen effective January 1, 2006. Mr. McManus serves as a Director of Energen and each of its subsidiaries. (4)    Mr. Porter has been employed by the Company in various financial capacities since 1989. He was elected Controller of Energen Resources in 1998. In 2001, he was elected Vice President – Finance of Energen Resources. He was elected Vice President, Chief Financial Officer and Treasurer of Energen and each of its subsidiaries effective January 1, 2007. (5)    Mr. Reynolds has been employed by the Company in various capacities since 1980. He was elected General Counsel and Secretary of Energen and each of its subsidiaries in April 1991. He was elected President and Chief Operating Officer of Alagasco effective January 1, 2003. (6)    Mr. Richardson has been employed by the Company in various capacities since 1985. He was elected Vice President – Acquisitions and Engineering of Energen Resources in 1997. He was elected Executive Vice President and Chief Operating Officer of Energen Resources effective January 1, 2006.

15

(7)    Ms. Carr was employed by the Company in various capacities from January 1985 to April 1989. She was not employed from May 1989 through December 1997. She was elected Controller of Energen in January 1998 and elected Vice President and Controller of Energen in October 2001.

(8)    Mr. Woodruff has been employed by the Company in various capacities since 1986. He was elected Vice President-Legal and Assistant Secretary of Energen and each of its subsidiaries in April 1991 and Vice President-Corporate Development of Energen in October 1995. He was elected General Counsel and Secretary of Energen and each of its subsidiaries effective January 1, 2003.

16

PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Quarterly Market Prices and Dividends Paid Per Share

Quarter ended(in dollars)	High	Low	Close	Dividends Paid
March 31, 2004	22.36	19.94	20.63	.0925
June 30, 2004	24.28	20.06	24.00	.0925
September 30, 2004	25.98	22.93	25.78	.09625
December 31, 2004	30.04	25.44	29.48	.09625
March 31, 2005	34.09	27.06	33.30	.10
June 30, 2005	35.64	28.65	35.05	.10
September 30, 2005	43.56	33.85	43.26	.10
December 31, 2005	44.31	34.50	36.32	.10
March 31, 2006	39.49	32.71	35.00	.11
June 30, 2006	38.42	32.16	38.41	.11
September 30, 2006	44.48	36.95	41.87	.11
December 31, 2006	47.60	38.50	46.94	.11

Energen’s common stock is listed on the New York Stock Exchange under the symbol EGN. On January 23, 2007, there were 7,390 holders of record of Energen’s common stock. At the date of this filing, Energen Corporation owned all the issued and outstanding common stock of Alabama Gas Corporation.

The following table summarizes information concerning securities authorized for issuance under equity compensation plans:

Plan Category	Number of Securities to be Issued Upon Exercise of Outstanding Options	Weighted Average Exercise Price		Number of Securities Remaining Available for Future Issuance Under Equity Compensation Plans
Equity compensation plans approved by security holders	428,078	$	15.35	2,223,336
Equity compensation plans not approved by security holders	—		—	—
Total	428,078	$	15.35	2,223,336

The following table summarizes information concerning purchases of equity securities by the issuer:

Period	Total Number of Shares Purchased*		Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans	Maximum Number of Shares that May Yet Be Purchased Under the Plans**
October 1, 2006 through October 31, 2006	78	*	$	40.52	—	9,992,700
November 1, 2006 through November 30, 2006	1,218 1,000,000	*	$ $	45.51 43.44	—	8,992,700
December 1, 2006 through December 31, 2006	3,901	*	$	47.02	—	8,992,700
Total	1,005,197		$	43.46	—	8,992,700

* Acquired in connection with tax withholdings and payment of exercise price on stock compensation plans.

** By resolution adopted May 24, 1994, and supplemented by a resolution adopted April 26, 2000 and June 24, 2006, the Board of Directors authorized the Company to repurchase up to 12,564,400 shares of the Company’s common stock. The resolutions do not have an expiration date.

Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

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PERFORMANCE GRAPH

Energen Corporation — Comparison of Five-Year Cumulative Shareholder Returns

This graph compares the total shareholder returns (assuming reinvestment of dividends) of Energen, the Standard & Poor’s Composite Stock Index (S&P 500), an industry peer index compiled by the Company (Peer Group), the Standard & Poor’s Supercomposite Oil & Gas Exploration & Production Index (S15OILP), and the Standard & Poor’s Supercomposite Gas Utilities Index (S15GASUX). The graph assumes $100 invested at the per-share closing price of the common stock on the New York Exchange Composite Tape on December 31, 2001, in the Company and each of the indices.

As of December 31,	2001		2002		2003		2004		2005		2006
S&P 500 Index	$	100	$	78	$	100	$	111	$	117	$	135
Energen	$	100	$	121	$	175	$	255	$	318	$	416
Peer Group	$	100	$	110	$	138	$	179	$	234	$	265
S15OILP Index	$	100	$	101	$	128	$	175	$	283	$	293
S15GASUX	$	100	$	68	$	84	$	99	$	107	$	134

Total shareholder return includes reinvested dividends. The Peer Group index includes the companies listed below: AGL Resources, Inc., Atmos Energy Corp., Cabot Oil & Gas Corp., Chesapeake Energy Corp., Comstock Resources, Inc., Denbury Resources, Inc., Encore Acquisition Co., Energy East Corp., Equitable Resources, Inc., Keyspan Corp., Laclede Group, Inc., MDU Resources Group, Inc., National Fuel Gas Co., New Jersey Resources Corp., Nicor Inc., Northwest Natural Gas Co., Oneok Inc., Peoples Energy Corp., Piedmont Natural Gas Co., Questar Corp., Quicksilver Resources, Inc., Range Resources Corp., Scana Corp., South Jersey Industries, Inc., Southwest Gas Corp., Southwestern Energy Co., St. Mary Land & Exploration Co., UGI Corp., Vectren Corp., WGL Holdings, Inc., Wisconsin Energy Corp., and XTO Energy, Inc.

18

ITEM 6. SELECTED FINANCIAL DATA

The selected financial data as set forth below should be read in conjunction with the Consolidated Financial Statements and the Notes to Financial Statements included in this Form 10-K.

SELECTED FINANCIAL AND COMMON STOCK DATA

Energen Corporation

Years ended December 31, (dollars in thousands, except per share amounts)	2006			2005		2004		2003		2002
INCOME STATEMENT
Operating revenues	$	1,393,986	*	$	1,128,394	$	936,857	$	841,631	$	667,419
Income from continuing operations before cumulative effect of change in accounting principle	$	273,523	*	$	172,886	$	127,305	$	110,104	$	70,204
Net income	$	273,570	*	$	173,012	$	127,463	$	110,654	$	68,639
Diluted earnings per average common share from continuing operations before cumulative effect of change in accounting principle	$	3.73	*	$	2.35	$	1.74	$	1.54	$	1.04
Diluted earnings per average common share	$	3.73	*	$	2.35	$	1.74	$	1.55	$	1.01
BALANCE SHEET
Total property, plant and equipment, net	$	2,252,414		$	2,068,011	$	1,783,059	$	1,433,451	$	1,351,554
Total assets	$	2,836,887		$	2,618,226	$	2,181,739	$	1,778,232	$	1,643,012
Long-term debt	$	582,490		$	683,236	$	612,891	$	552,842	$	512,954
Total shareholders’ equity	$	1,202,069		$	892,678	$	803,666	$	699,032	$	582,810
COMMON STOCK DATA
Annual dividend rate at period-end	$	0.44		$	0.40	$	0.385	$	0.37	$	0.36
Cash dividends paid per common share	$	0.44		$	0.40	$	0.3775	$	0.365	$	0.355
Diluted average common shares outstanding (000)		73,278			73,715		73,117		71,434		67,677
Price range:
High	$	47.60		$	44.31	$	30.04	$	21.00	$	15.00
Low	$	32.16		$	27.06	$	19.94	$	14.04	$	10.83
Close	$	46.94		$	36.32	$	29.48	$	20.52	$	14.55

* Includes an after-tax gain of $34.5 million on the sale of a 50 percent interest in Energen Resources’ lease position in various unproved shale plays in Alabama.

All information has been restated to reflect a 2-for-1 stock split effective June 1, 2005.

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SELECTED BUSINESS SEGMENT DATA

Energen Corporation

Years ended December 31, (dollars in thousands)	2006		2005		2004		2003		2002
OIL AND GAS OPERATIONS
Operating revenues from continuing operations
Natural gas	$	437,560	$	365,635	$	276,482	$	235,022	$	145,443
Oil		181,459		116,651		98,409		87,192		72,132
Natural gas liquids		50,258		38,455		30,902		25,938		21,843
Other		61,265		6,953		4,324		4,380		3,570
Total	$	730,542	$	527,694	$	410,117	$	352,532	$	242,988
Production volumes from continuing operations
Natural gas (MMcf)		62,824		61,048		57,164		55,304		45,891
Oil (MBbl)		3,645		3,316		3,434		3,411		2,989
Natural gas liquids (MMgal)		76.3		70.5		68.2		66.6		71.9
Production volumes from continuing operations (MMcfe)		95,596		91,020		87,513		85,291		74,093
Total production volumes (MMcfe)		95,595		91,099		87,606		86,157		77,973
Proved reserves
Natural gas (MMcf)		1,096,429		1,080,161		1,019,436		886,307		803,748
Oil (MBbl)		74,893		74,962		54,500		52,528		49,833
Natural gas liquids (MBbl)		29,504		31,934		34,613		27,245		26,697
Total (MMcfe)		1,722,811		1,721,537		1,554,114		1,364,945		1,262,928
Other data from continuing operations
Lease operating expense (LOE)
LOE and other	$	134,853	$	104,241	$	79,191	$	67,833	$	56,932
Production taxes		49,509		52,271		37,285		27,686		18,186
Total	$	184,362	$	156,512	$	116,476	$	95,519	$	75,118
Depreciation, depletion and amortization	$	97,842	$	89,340	$	80,896	$	79,495	$	70,285
Capital expenditures	$	259,678	$	353,712	$	403,936	$	163,338	$	305,476
Operating income	$	405,149	$	243,876	$	180,379	$	153,325	$	78,680
NATURAL GAS DISTRIBUTION
Operating revenues
Residential	$	426,066	$	384,753	$	340,229	$	320,938	$	277,088
Commercial and industrial		181,900		166,957		138,686		126,638		104,247
Transportation		45,950		43,291		40,221		38,250		38,395
Other		9,528		5,699		7,604		3,273		4,701
Total	$	663,444	$	600,700	$	526,740	$	489,099	$	424,431
Gas delivery volumes (MMcf)
Residential		22,310		24,601		25,383		27,248		26,358
Commercial and industrial		11,226		12,498		12,323		12,564		11,838
Transportation		50,760		49,850		54,385		55,623		59,644
Total		84,296		86,949		92,091		95,435		97,840
Average number of customers
Residential		420,558		425,110		425,673		427,413		425,630
Commercial, industrial and transportation		34,456		34,936		35,248		35,463		35,601
Total		455,014		460,046		460,921		462,876		461,231
Other data
Depreciation and amortization	$	44,244	$	42,351	$	39,881	$	37,171	$	33,682
Capital expenditures	$	76,157	$	73,276	$	58,208	$	57,906	$	65,815
Operating income	$	74,274	$	72,922	$	66,199	$	66,848	$	59,370

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

CRITICAL ACCOUNTING POLICIES

The Company’s consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America. Management has identified the following critical accounting policies in the application of existing accounting standards or in the implementation of new standards that involve significant judgments and estimates by the Company. The application of these accounting policies necessarily requires managements’ most subjective or complex judgments regarding estimates and projected outcomes of future events that could have a material impact on the financial statements:

Oil and Gas Operations

Accounting for Natural Gas and Oil Producing Activities and Related Reserves:The Company utilizes the successful efforts method of accounting for its natural gas and oil producing activities. Under this accounting method, acquisition and development costs of proved properties are capitalized and amortized on a units-of-production basis over the remaining life of total proved and proved developed reserves. Proved oil and gas reserves are the estimated quantities of crude oil, natural gas and natural gas liquids that geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions. Accordingly, these estimates do not include probable or possible reserves. Estimated oil and gas reserves are based on currently available reservoir data and are subject to future revision. Estimates of physical quantities of oil and gas reserves have been determined by Company engineers. Independent oil and gas reservoir engineers have reviewed the estimates of proved reserves of natural gas, crude oil and natural gas liquids attributed to the Company’s net interests in oil and gas properties as of December 31, 2006. The independent reservoir engineers have issued reports covering approximately 98 percent of the Company’s ending proved reserves and in their judgment these estimates were reasonable in the aggregate. The Company’s production of undeveloped reserves requires the installation or completion of related infrastructure facilities such as pipelines and the drilling of development wells.

Changes in oil and gas prices, operating costs and expected performance from the properties can result in a revision to the amount of estimated reserves held by the Company. If reserves are revised upward, earnings could be affected due to lower depreciation and depletion expense per unit of production. Likewise, if reserves are revised downward, earnings could be affected due to higher depreciation and depletion expense or due to an immediate writedown of the property’s book value if an impairment is warranted. The table below reflects an estimated increase in 2007 depreciation, depletion and amortization expense associated with an assumed downward revision in the reported oil and gas reserve amounts at December 31, 2006.

(dollars in thousands)	Percentage Change in Oil & Gas Reserves From Reported Reserves as of December 31, 2006
		-5	%		-10	%
Estimated increase in depreciation expense for the year ended December 31, 2007, net of tax	$	3,600		$	7,500

Asset Impairments:Oil and gas proved properties periodically are assessed for possible impairment, generally on a field-by-field basis, using the estimated undiscounted future cash flows of each field. Impairment losses are recognized when the estimated undiscounted future cash flows are less than the current net book values of the properties in a field. The Company monitors its oil and gas properties as well as the market and business environments in which it operates and makes assessments about events that could result in potential impairment issues. Such potential events may include, but are not limited to, substantial commodity price declines, unanticipated increased operating costs, and lower-than-expected production performance. If a material event occurs, Energen’s oil and gas subsidiary, Energen Resources Corporation, makes an estimate of undiscounted future cash flows to determine whether the asset is impaired. If the asset is impaired, the Company will record an impairment loss for the difference between the net book value of the properties and the fair value of the properties. The fair value of the properties typically is estimated using discounted cash flows.

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Cash flow and fair value estimates require Energen Resources to make projections and assumptions for pricing, demand, competition, operating costs, legal and regulatory issues, discount rates and other factors for many years into the future. These variables can, and often do, differ from the estimates and can have a positive or negative impact on the Company’s need for impairment or on the amount of impairment. In addition, further changes in the economic and business environment can impact the Company’s original and ongoing assessments of potential impairment.

Energen Resources adheres to Statement of Financial Accounting Standards (SFAS) No.19, “Financial Accounting and Reporting by Oil and Gas Producing Companies,” for recognizing any impairment of capitalized costs to unproved properties. The greatest portion of these costs generally relates to the acquisition of leasehold costs. The costs are capitalized and periodically evaluated as to recoverability, based on changes brought about by economic factors and potential shifts in business strategy employed by management. The Company considers a combination of geologic and engineering factors to evaluate the need for impairment of these costs.

Derivatives: Energen Resources periodically enters into commodity derivative contracts to manage its exposure to oil, natural gas and natural gas liquids price volatility. SFAS No. 133, “Accounting for Derivative Instruments and Hedging Activities” as amended requires all derivatives to be recognized on the balance sheet and measured at fair value. Realized gains and losses from derivatives designated as cash flow hedges are recognized in oil and gas production revenues when the forecasted transaction occurs. Energen Resources from time to time enters into derivative transactions that do not qualify for cash flow hedge accounting but are considered by management to be valid economic hedges. Gains and losses from the change in fair value of derivative instruments that do not qualify for hedge accounting are reported in current period operating revenues, rather than in the period in which the hedge transaction is settled. Energen Resources does not enter into derivatives or other financial instruments for trading purposes. The use of derivative contracts to mitigate price risk may cause the Company’s financial position, results of operations and cash flow to be materially different from results that would have been obtained had such risk mitigation activities not occurred.

Natural Gas Distribution

Regulated Operations: Alabama Gas Corporation (Alagasco), Energen’s utility subsidiary, applies SFAS No. 71, “Accounting for the Effects of Certain Types of Regulation,” to its regulated operations. This standard requires a cost to be capitalized as a regulatory asset that otherwise would be charged to expense if it is probable that the cost is recoverable in the future through regulated rates. Likewise, if current recovery is provided for a cost that will be incurred in the future, SFAS No. 71 requires the cost to be recognized as a regulatory liability. The Company anticipates SFAS No. 71 will continue as the applicable accounting standard for its regulated operations. Alagasco’s rate setting methodology, Rate Stabilization and Equalization, has been in effect since 1983.

Consolidated

Employee Benefit Plans:In December 2006, the Company adopted SFAS No. 158, “Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, an amendment of FASB Statements No. 87, 88, 106 and 132 (R)” (SFAS No. 158). This Standard retains the previous periodic expense calculation on an actuarial basis under the provisions of SFAS No. 87, “Employers’ Accounting for Pensions” and SFAS No. 106, “Employers’ Accounting for Postretirement Benefits Other than Pensions.” In addition, SFAS No. 158 requires an employer to recognize the net funded status of defined benefit pensions and other postretirement benefit plans (benefit plans) as an asset or liability in its statement of financial position and to recognize changes in the funded status through comprehensive income in the year in which the changes occur. As required by SFAS No. 158 as of December 31, 2006, the pension benefit obligation is the projected benefit obligation (PBO), a measurement of earned benefit obligations at expected retirement salary levels; for other postretirement plans, the benefit obligation is the accumulated postretirement benefit obligation (APBO), a measurement of earned postretirement benefit obligations expected to be paid to employees upon retirement. Prior to implementation of SFAS No. 158, the required pension benefit obligation was the accumulated benefit obligation (ABO), a measurement of earned benefit obligations at existing salary levels, and other postretirement obligations were not recorded as a liability on the statement of financial position. Alagasco established a regulatory asset for the portion of the total benefit obligation to be recovered through rates in future periods in accordance with SFAS No. 71.

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Actuarial assumptions attempt to anticipate future events and are used in calculating the expenses and liabilities related to these plans. The calculation of the liability related to the Company’s benefit plans includes assumptions regarding the appropriate weighted average discount rate, the expected long-term rate of return on the plans’ assets and the estimated weighted average rate of increase in the compensation level of its employee base for defined benefit pension plans. The key assumptions used in determining these calculations are disclosed in Note 5, Employee Benefit Plans, in the Notes to Financial Statements.

In selecting the discount rate, consideration was given to Moody’s Aa corporate bond rates, along with a yield curve applied to payments the Company expects to make out of its retirement plans. The yield curve is comprised of a broad base of Aa bonds with maturities between zero and thirty years. The discount rate was developed as the level equivalent rate that would produce the same present value as that using spot rates aligned with the projected benefit payments; the discount rate used to determine net periodic costs was 5.5 percent for each of the plans for the year ended December 31, 2006. The assumed rate of return on assets is the weighted average of expected long-term asset assumptions; the return on assets used to determine net periodic expense was 8.5 percent for each of the applicable plans for the year ended December 31, 2006. The estimated weighted average rate of increase in the compensation level for pay related plans covering a majority of employees was 3.5 percent for the year ended December 31, 2006.

The selection and use of actuarial assumptions affects the amount of benefit expense recorded in the Company’s financial statements. The table below reflects a hypothetical 25 basis point change in assumed actuarial assumptions to pre-tax benefit expense for the year ended December 31, 2006:

(dollars in thousands)	Pension expense		Postretirement Expense
Discount rate change	$	1,000	$	100
Return on assets	$	400	$	100
Compensation increase	$	600	$	—

The weighted average discount rate, return on plan assets and estimated rate of compensation increase used in the 2007 actuarial assumptions is 5.77 percent, 8.25 percent, and 4.22 percent, respectively.

Asset Retirement Obligation:The Company records the fair value of a liability for an asset retirement obligation (ARO) in the period in which it is incurred. Subsequent to initial measurement, liabilities are required to be accreted to their present value each period and capitalized costs are depreciated over the estimated useful life of the related assets. Upon settlement of the liability, the Company will settle the obligation for its recorded amount and recognize the resulting gain or loss. Energen Resources has an obligation to remove tangible equipment and restore land at the end of oil and gas production operations. Alagasco has certain removal cost obligations related to its gas distribution assets and a conditional asset retirement obligation to purge and cap its distribution and transmission lines upon abandonment. The estimate of future restoration and removal costs includes numerous assumptions and uncertainties, including but not limited to, inflation factors, discount rates, timing of settlement, and changes in contractual, regulatory, political, environmental, safety and public relations considerations.

RESULTS OF OPERATIONS

Consolidated Net Income

Energen Corporation’s net income for the year ended December 31, 2006 totaled $273.6 million, or $3.73 per diluted share and compared favorably to the year ended December 31, 2005 net income of $173 million, or $2.35 per diluted share. This 58.7 percent increase in earnings per diluted share (EPS) largely reflected the result of significantly higher prices for natural gas, oil and natural gas liquids, the impact of a 4.5 billion cubic feet equivalent (Bcfe) increase in production volumes from Energen Resources as well as an after-tax gain of approximately $34.5 million, or $0.47 per diluted share, on the sale of a 50 percent interest in Energen Resources’ lease position in various shale plays in Alabama to Chesapeake Energy Corporation (Chesapeake). For the year ended December 31, 2006, Energen Resources earned $237.6 million, as compared with $135.3 million in the previous year. Alagasco generated net income of $37.3 million in the current year as compared with net income in the prior period of $37 million. For the year ended December 31, 2004, Energen reported earnings of $127.5 million, or $1.74 per diluted share.

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2006 vs 2005:Energen Resources’ net income rose 75.6 percent to $237.6 million in 2006. Energen Resources’ income from continuing operations totaled $237.6 million in 2006 as compared with $135.2 million in 2005. Discontinued operations in 2006 generated income of $47,000 as compared with income of $125,000 in 2005. The primary factors positively influencing income from continuing operations included higher commodity prices of approximately $77 million after-tax, the impact of increased production volumes of approximately $16 million after-tax, the $34.5 million after-tax gain on the Chesapeake sale and a $6.7 million after-tax gain on the sale of Energen Resources’ bankruptcy claim against Enron. The primary negative influences on income from continuing operations were higher lease operating expense of approximately $19 million after-tax, higher depreciation, depletion and amortization (DD&A) expense of approximately $5 million after-tax and increased administrative expenses of approximately $5 million after-tax.

Alagasco earned net income of $37.3 million in 2006 as compared with net income of $37 million in 2005. This increase in earnings largely reflected the utility’s ability to earn on a higher level of equity partially offset by a decrease in customer usage. Alagasco’s return on average equity (ROE) was 13.1 percent in 2006 compared with 13.5 percent in 2005.

2005 vs 2004:For the year ended December 31, 2005, Energen Resources’ net income totaled $135.3 million as compared with $94.1 million for the 12 months ended December 31, 2004. Energen Resources’ income from continuing operations totaled $135.2 million in 2005 as compared with $93.9 million in 2004 primarily due to increased commodity prices of approximately $62 million after-tax along with the impact of increased production volumes of approximately $10 million after-tax. These increases were partially offset by higher lease operating expense of approximately $16 million after-tax, higher production taxes of approximately $9 million after-tax, increased DD&A expense of approximately $5 million after-tax and increased administrative expenses of approximately $5 million after-tax. Alagasco earnings increased to $37 million in 2005 from $33.8 million in 2004 largely as a result of the utility earning on a higher level of equity. Alagasco achieved a ROE of 13.5 percent in 2005 compared with 12.8 percent in 2004.

Operating Income

Consolidated operating income in 2006, 2005 and 2004 totaled $477.3 million, $315.7 million and $244.8 million, respectively. This growth in operating income has been influenced by strong financial performance from Energen Resources under Energen’s diversified growth strategy, implemented in fiscal 1996. Alagasco also contributed to this growth in operating income consistent with increases in the levels of equity upon which it has been able to earn a return.

Oil and Gas Operations:Revenues from oil and gas operations rose in the current year largely as a result of increased commodity prices and increased production volumes. Revenue per unit of production for natural gas production increased 16.2 percent to $6.96 per thousand cubic feet (Mcf), oil revenue per unit of production rose 41.5 percent to $49.79 per barrel and natural gas liquids revenue per unit of production increased 20 percent to an average price of $0.66 per gallon during 2006. Production from continuing operations increased 5 percent to 95.6 Bcfe during 2006. Production increased primarily due to additional development activities in the San Juan Basin, accelerated workovers due to milder winter weather and increased volumes related to the purchase of Permian Basin oil properties in the fourth quarter of 2005. Negatively affecting production were normal production declines. Natural gas production rose 2.9 percent to 62.8 billion cubic feet (Bcf), oil volumes increased 9.9 percent to 3,645 thousand barrels (MBbl). Production of natural gas liquids increased 8.2 percent to 76.3 million gallons (MMgal).

In 2005, revenues from oil and gas operations increased primarily as a result of increased commodity prices, an increase in volumes related to the August 2004 acquisition of San Juan Basin coalbed methane properties and increased drilling of wells in North Louisiana. Partially offsetting these positive factors was a normal production decline in excess of new production coming on-line primarily in the Permian Basin. Revenue per unit of production related to natural gas increased 23.8 percent to $5.99 per Mcf, oil revenues per unit of production rose 22.8 percent

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to $35.18 per barrel and natural gas liquids revenue per unit of production increased 22.2 percent to an average price of $0.55 per gallon during the year ended December 31, 2005. Production from continuing operations rose 4 percent to 91 Bcfe in 2005. Natural gas production increased 6.8 percent to 61 Bcf, oil volumes declined 3.4 percent to 3,316 MBbl and natural gas liquids production increased 3.4 percent to 70.5 MMgal.

Coalbed methane operating fees are calculated as a percentage of net proceeds on certain properties, as defined by the related operating agreements, and vary with changes in natural gas prices, production volumes and operating expenses. Revenues from operating fees were $6.6 million, $8.7 million and $6.6 million in 2006, 2005 and 2004, respectively. Energen Resources also recorded a $55.5 million pre-tax gain in other operating revenues for the sale of a 50 percent interest in Energen Resources’ lease position to Chesapeake for various shale plays in Alabama.

Years ended December 31, (in thousands, except sales price data)	2006		2005			2004
Operating revenues from continuing operations
Natural gas	$	437,560	$	365,635		$	276,482
Oil		181,459		116,651			98,409
Natural gas liquids		50,258		38,455			30,902
Operating fees		6,553		8,674			6,648
Other		54,712		(1,721	)		(2,324	)
Total operating revenues from continuing operations	$	730,542	$	527,694		$	410,117
Production volumes from continuing operations
Natural gas (MMcf)		62,824		61,048			57,164
Oil (MBbl)		3,645		3,316			3,434
Natural gas liquids (MMgal)		76.3		70.5			68.2
Revenue per unit of production including effects of all derivative instruments
Natural gas (per Mcf)	$	6.96	$	5.99		$	4.84
Oil (per barrel)	$	49.79	$	35.18		$	28.66
Natural gas liquids (per gallon)	$	0.66	$	0.55		$	0.45
Revenue per unit of production including effects of qualifying cash flow hedges
Natural gas (per Mcf)	$	6.96	$	6.36		$	4.87
Oil (per barrel)	$	49.54	$	35.18		$	29.70
Natural gas liquids (per gallon)	$	0.66	$	0.55		$	0.45
Revenue per unit of production excluding effects of all derivative instruments
Natural gas (per Mcf)	$	6.53	$	7.81		$	5.68
Oil (per barrel)	$	59.88	$	51.61		$	38.33
Natural gas liquids (per gallon)	$	0.80	$	0.74		$	0.59
Average production (lifting) cost (per Mcfe)	$	1.41	$	1.15		$	0.90
Average production tax (per Mcfe)	$	0.52	$	0.57		$	0.43
Average depreciation rate (per Mcfe)	$	1.00	$	0.96		$	0.90

Energen Resources may, in the ordinary course of business, be involved in the sale of developed or undeveloped properties. With respect to developed properties, sales may occur as a result of, but not limited to, disposing of non-strategic or marginal assets and accepting offers where the buyer gives greater value to a property than does Energen Resources. The Company is required to reflect gains and losses on the dispositions of these assets, the writedown of certain properties held-for-sale, and income or loss from the operations of the associated held-for-sale properties as discontinued operations under the provisions of SFAS No. 144,”Accounting for Impairment or Disposal of Long-Lived Assets”. Energen Resources had no proved property sales during 2006 or 2004. During 2005, Energen Resources recorded a pre-tax gain of $213,000 primarily from a proved property sale located in the Permian Basin.

Operations and maintenance (O&M) expense increased $31.5 million and $31.1 million in 2006 and 2005, respectively. Lease operating expense (excluding production taxes) in 2006 increased $30.6 million due to a variety of factors including the December 2005 acquisition of Permian Basin oil properties, additional maintenance expense in the San Juan Basin designed to increase production, an increased number of wells in period comparisons, increased workover expense, higher transportation costs and overall cost increases. In 2005, lease

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operating expense (excluding production taxes) increased by $25.1 million primarily due to increased workover and maintenance expense, increased ad valorem taxes, higher transportation costs and other overall cost increases related to increased commodity prices. Partially offsetting these increases were lower compliance costs related to prior year regulations for below-grade storage pits. Administrative expense decreased $2.6 million in 2006 largely due to a $10.7 million pre-tax gain on the sale of Energen Resources’ bankruptcy claims against Enron; this gain was partially offset by higher labor-related costs. In 2005, administrative expense increased $7.5 million primarily due to labor-related costs. Exploration expense rose $3.5 million in 2006 largely due to increased exploratory efforts. In 2005, exploration expense decreased $1.4 million.

DD&A expense increased $8.5 million in 2006 and $8.4 million in 2005. The average depletion rates were $1.00 per Mcfe in 2006, $0.96 per Mcfe in 2005 and $0.90 per Mcfe in 2004. The increase in the average 2006 rates were largely due to higher depletion rates on oil properties purchased in the Permian Basin in December 2005 and higher rates due to a downward revision to estimated reserves resulting from a reduction in year-end reserve prices. Partially offsetting the higher rate was increased production in lower rate areas. The increase in the average 2005 depletion rates relates to a higher depletion rate on coalbed methane properties purchased in 2004 as well as a production mix that reflected a higher percentage of the Company’s shorter-lived North Louisiana/East Texas production. Increased production volumes also contributed to the increase in DD&A expense during 2006 and 2005.

Energen Resources’ expense for taxes other than income taxes primarily reflected production-related taxes. Energen Resources recorded severance taxes of $49.5 million, $52.3 million and $37.3 million for 2006, 2005 and 2004, respectively. Decreased severance taxes in 2006 resulted from lower natural gas commodity market prices largely offset by higher production volumes and increased oil and natural gas liquids commodity market prices. Increased 2005 severance taxes were the result of increased commodity market prices and production. Commodity market prices exclude the effects of derivative instruments for purposes of determining severance taxes.

Natural Gas Distribution:As discussed more fully in Note 2, Regulatory Matters, in the Notes to Financial Statements, Alagasco is subject to regulation by the Alabama Public Service Commission (APSC). On June 10, 2002, the APSC issued an order to extend the utility’s rate-setting mechanism. Under the terms of that extension, RSE will continue after January 1, 2008, unless, after notice to the company and a hearing, the Commission votes to either modify or discontinue its operation.

Alagasco generates revenues through the sale and transportation of natural gas. The transportation rate does not contain an amount representing the cost of gas, and Alagasco’s rate structure allows similar margins on transportation and sales gas. Weather can cause variations in space heating revenues, but operating margins essentially remain unaffected due to a temperature adjustment mechanism that requires Alagasco to adjust certain customer bills monthly to reflect changes in usage due to departures from normal temperatures. The temperature adjustment applies primarily to residential, small commercial and small industrial customers.

Alagasco’s natural gas and transportation sales revenues totaled $663.4 million, $600.7 million and $526.7 million in 2006, 2005 and 2004, respectively. Sales revenue in 2006 and 2005 increased primarily due to an increase in commodity gas costs partially offset by a decrease in customer usage. In 2006, weather that was 2.5 percent warmer than in the prior year along with customer conservation related to higher gas costs contributed to a 9.3 percent decline in residential sales volumes while commercial and industrial volumes decreased 10.2 percent. Large transportation volumes increased 1.8 percent. In 2005, weather was 3.6 percent colder than in the prior year. Residential sales volumes declined 3.1 percent while commercial and industrial volumes increased 1.4 percent. Large transportation volumes decreased 8.3 percent. In 2006, higher commodity gas costs partially offset by a decline in gas purchase volumes resulted in a 17.2 percent increase in cost of gas. Increased gas costs along with increased gas purchase volumes contributed to a 21.6 percent increase in cost of gas in 2005.

O&M expense at the utility increased slightly in 2006 and 3.4 percent in 2005 largely due to higher bad debt expense and increased distribution maintenance expenses. These increases were offset by decreased labor-related expenses. The increase in O&M expense per customer for the rate years ended September 30, 2006 and 2004 were above the inflation-based Cost Control Measurement (CCM) established by the APSC as part of the utility’s rate-setting

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mechanism; as a result, three quarters of the differences, or $1.5 million and $1.2 million pre-tax, respectively, were returned to the customers through RSE (see Note 2, Regulatory Matters, in the Notes to Financial Statements). Alagasco’s O&M expense fell within the index range for the rate year ended September 30, 2005.

Depreciation expense rose 4.5 percent and 6.2 percent in 2006 and 2005, respectively, due to normal growth of the utility’s distribution and support systems. Alagasco’s expense for taxes other than income primarily reflects various state and local business taxes as well as payroll-related taxes. State and local business taxes generally are based on gross receipts and fluctuate accordingly.

Years ended December 31, (in thousands)	2006			2005			2004
Natural gas transportation and sales revenues	$	663,444		$	600,700		$	526,740
Cost of natural gas		(373,097	)		(318,269	)		(261,800	)
Operations and maintenance		(126,948	)		(126,041	)		(121,896	)
Depreciation		(44,244	)		(42,351	)		(39,881	)
Income taxes		(22,002	)		(22,360	)		(19,703	)
Taxes, other than income taxes		(44,881	)		(41,117	)		(36,964	)
Operating income	$	52,272		$	50,562		$	46,496
Natural gas sales volumes (MMcf)
Residential		22,310			24,601			25,383
Commercial and industrial		11,226			12,498			12,323
Total natural gas sales volumes		33,536			37,099			37,706
Natural gas transportation volumes (MMcf)		50,760			49,850			54,385
Total deliveries (MMcf)		84,296			86,949			92,091

Non-Operating Items

Consolidated:Interest expense in 2006 increased $1.9 million largely due to higher storage gas inventories at Alagasco and an increase in interest rates associated with Energen’s $100 million Floating Rate Senior Notes issued in November 2004. Interest expense in 2005 increased $4.1 million primarily due to the November 2004 issuance of $100 million of Floating Rate Senior Notes, Alagasco’s issuance of $80 million of long-term debt in January 2005 and Alagasco’s $80 million issuance of long-term debt in November 2005. Positively impacting interest expense was Alagasco’s redemption of $104.7 million of long-term debt during 2005 and 2004. The average daily outstanding balance under short-term credit facilities was $63.7 million in 2006. The average daily outstanding balance under short-term credit facilities was $17.7 million in 2005 as compared to $92.6 million in 2004.

Income tax expense increased in the periods presented primarily due to higher pre-tax income. As of December 31, 2006, the amount of minimum tax credit that has been previously recognized and can be carried forward to reduce future regular tax liability is $1.3 million.

FINANCIAL POSITION AND LIQUIDITY

The Company’s net cash from operating activities totaled $482.9 million, $335.1 million and $291.1 million in 2006, 2005 and 2004, respectively. Operating cash flow in 2006, 2005 and 2004 benefited from higher realized commodity prices and production volumes at Energen Resources. In 2006, income from operations before income taxes included a pre-tax gain of $55.5 million related to the sale of a 50 percent interest in Energen Resources’ lease position in various shale plays in Alabama to Chesapeake; the cash proceeds from the sale are included in the investing activities on the Consolidated Statements of Cash Flows, as described more fully below. During the periods presented, working capital needs at Alagasco were primarily affected by increased gas costs compared to the prior period and storage gas inventory. Other working capital items, which primarily are the result of changes in throughput and the timing of payments, combined to create the remaining increases for all years.

During 2006, the Company made net investments of $256.9 million. Energen Resources invested $46.4 million in property acquisitions, $186.3 million for development costs including approximately $130.6 million to drill 309

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gross development wells and $25.9 million for exploration. In December 2006, Energen Resources completed its purchase of gas properties located in the San Juan Basin from Dominion Resources, Inc. for approximately $30 million. The acquisition added approximately 19 Bcfe of proved reserves and had an effective date of December 1, 2006. Energen Resources sold certain properties during 2006, resulting in cash proceeds of $79.4 million including $75 million received from Chesapeake for a 50 percent interest in its lease position in certain unproved shale plays in Alabama. Utility expenditures in 2006 totaled $76.2 million and primarily represented system distribution expansion and support facilities. During 2005, cash used in investing activities totaled $400.7 million. Energen Resources invested $188.4 million in property acquisitions, $157.5 million for development costs including approximately $123 million to drill 294 gross development wells and $5.1 million for exploration. In December 2005, Energen Resources completed its purchase of oil properties located in the Permian Basin from a private company for a contract price of approximately $168 million. The acquisition added approximately 131 Bcfe of proved reserves and had an effective date of November 1, 2005. Energen Resources sold certain properties during 2005, resulting in cash proceeds of $10.8 million. Utility expenditures in 2005 totaled $73.3 million. During 2004, the Company made net investments of $453.4 million. Energen Resources invested $274.4 million in property acquisitions, $124.6 million for development costs including approximately $89 million to drill 288 gross development wells and $5 million for exploration. Utility expenditures in 2004 totaled $58.2 million.

During 2006, the Company added approximately 20 Bcfe of reserves primarily from the San Juan Basin acquisition. Also during 2006, Energen Resources added 147 Bcfe of reserves from discoveries and other additions, primarily the result of improved drilling technology that increased the number of proved undeveloped locations in the San Juan Basin as well as continued downspacing in the Permian Basin.Energen Resources added approximately 224 Bcfe and 315 Bcfe of reserves in 2005 and 2004, respectively.

In 2006, net cash used for financing activities totaled $224.4 million largely due to $84.3 million incurred from the buy-back of Energen common stock under its stock repurchase plan along with the repayment of short-term borrowings. In addition, long-term debt was reduced by $15.9 million for current maturities in 2006. The Company provided $69.8 million from financing activities in 2005. In January 2005, Alagasco issued $40 million of long-term debt with an interest rate of 5.2 percent due January 15, 2020 and $40 million of long-term debt with an interest rate of 5.7 percent due January 15, 2035. In November 2005, Alagasco issued $80 million of long-term debt with an interest rate of 5.368 percent due December 1, 2015. Long-term debt was reduced by $84.8 million including Alagasco’s redemption of $18 million in Medium-Term Notes maturing June 27, 2007 to July 5, 2022 in August 2005 and $56.7 million of long-term debt maturing June 15, 2015 to June 27, 2025 in December 2005. In 2004, net cash provided from financing activities totaled $164.6 million. Long-term debt was reduced by $40.1 million for current maturities in 2004, including $30 million of Medium-Term Notes called by Alagasco in April 2004. For each of the years, net cash used in financing activities also reflected dividends paid to common stockholders.

Capital Expenditures

Oil and Gas Operations:Energen Resources spent a total of $1 billion for capital projects during the years ended December 31, 2006, 2005 and 2004. Property acquisition expenditures totaled $509.2 million, development activities totaled $468.3 million, and exploratory expenditures totaled $36 million.

Years ended December 31, (in thousands)	2006		2005		2004
Capital and exploration expenditures for:
Property acquisitions	$	46,428	$	188,403	$	274,400
Development		186,264		157,458		124,588
Exploration		25,936		5,065		5,036
Other		4,411		3,037		1,988
Total		263,039		353,963		406,012
Less exploration expenditures charged to income		3,361		251		2,076
Net capital expenditures	$	259,678	$	353,712	$	403,936

Natural Gas Distribution:During the years ended December 31, 2006, 2005 and 2004, Alagasco invested $207.6 million for capital projects: $154.5 million for expansion, replacements and support of its distribution system and $53.1 million for support facilities, including the replacement of liquifaction equipment and the development and implementation of information systems.

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Years ended December 31, (in thousands)	2006		2005		2004
Capital expenditures for:
Renewals, replacements, system expansion and other	$	60,244	$	53,381	$	40,876
Support facilities		15,913		19,895		17,332
Total	$	76,157	$	73,276	$	58,208

FUTURE CAPITAL RESOURCES AND LIQUIDITY

As Energen continues to implement its diversified growth strategy, the Company plans to invest significant capital in Energen Resources’s oil and gas production operations. In the three-year period ending December 31, 2009, the Company expects to spend approximately $660 million in its four major areas of operation. During the three year period, Energen Resources anticipates spending approximately $333 million on development of previously identified proved undeveloped reserves. For 2007, the Company expects its oil and gas capital spending to total approximately $275 million, including $256 million for the development of existing properties. Included in this $256 million is approximately $186 million for the development of previously identified proved undeveloped reserves.

The Company also may allocate additional capital during this three-year period for other oil and gas activities such as property acquisitions and the exploration and development of potential shale plays primarily in Alabama. Energen Resources’ ability to invest in property acquisitions is subject to market conditions and industry trends. Energen Resources may evaluate acquisition opportunities which arise in the marketplace and from time to time will pursue acquisitions that meet Energen’s acquisition criteria which could result in capital expenditures different from those outlined above. In October 2006, Energen Resources sold to Chesapeake Energy Corporation (Chesapeake) a 50 percent interest in its unproved lease position of approximately 200,000 acres in various shale plays in Alabama for $75 million and a $15 million carried drilling interest. In addition, the two companies signed an agreement to form an area of mutual interest (AMI) through which they will pursue new leases, exploration, development and operations on a 50-50 basis, for at least the next 10 years. The Company has not included in its capital spending estimates above any amounts associated with potential development and/or exploratory drilling in the AMI.

To finance capital spending at Energen Resources, the Company primarily expects to use internally generated cash flow supplemented by its short-term credit facilities. The Company also may issue long-term debt and equity periodically to replace short-term obligations, enhance liquidity and provide for permanent financing. Energen has $100 million Floating Rate Senior Notes due November 2007 that it plans to repay using internally generated cash flow. Energen currently has available short-term credit facilities aggregating $415 million to help finance its growth plans and operating needs.

Energen also plans to consider stock repurchases as a capital investment option over the next 24-36 months. In May 2006, Energen began a buy-back of its common stock under an existing stock repurchase plan. In June 2006, the Company’s Board of Directors authorized an additional 9 million shares of common stock for repurchase. Energen may buy shares from time to time on the open market or in negotiated purchases. The timing and amounts of any repurchases are subject to changes in market conditions. During 2006, the Company purchased 2.2 million shares at an average price of $39.08 per share. The Company plans to continue utilizing internally generated cash flow to fund any future stock repurchases.

Energen Resources has experienced various market driven conditions generally caused by the increased commodity price environment including, but not limited to, higher workover and maintenance expenses, increased taxes and other field-service-related expenses. The Company anticipates influences such as weather, natural disasters, changes in global economics and political unrest will continue to contribute to increased price volatility in the near term. Commodity price volatility will affect the Company’s revenue and associated cash flow available for investment.

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For the 2006-2007 winter heating season, Alagasco has hedged or intends to use storage for its estimated, weather-normalized, core-market gas supply purchases. The Company’s efforts to minimize commodity price volatility through hedging is reflected in Alagasco’s current rates. Alagasco’s rate schedules for natural gas distribution charges contain a Gas Supply Adjustment (GSA) rider which permits the pass-through to customers for changes in the cost of gas supply. The GSA rider is designed to capture the Company’s cost of natural gas and provides for a pass-through of gas cost fluctuations to customers without markup; the cost of gas includes the commodity cost, pipeline capacity, transportation and fuel costs, and risk management gains and losses. Sustained high prices may decrease Alagasco’s customer base and could result in a further decline of per customer use and number of customers. The utility will continue to monitor its bad debt reserve and will make adjustments as required based on the evaluation of its receivables which are impacted by natural gas prices.

Alagasco maintains an investment in storage gas that is expected to average approximately $68 million in 2007 but may vary depending upon the price of natural gas. During 2007 and 2008, Alagasco plans to invest approximately $59 million and $62 million, respectively, in utility capital expenditures for normal distribution and support systems. Over the three-year period ending December 31, 2009, Alagasco anticipates capital investments of approximately $185 million. The utility anticipates funding these capital requirements through internally generated capital and the utilization of short-term credit facilities. Alagasco issued $45 million in long-term debt in January 2007 and recalled approximately $45 million in the same period in order to capitalize on lower interest rates. In January 2005, Alagasco issued $80 million in long-term debt to repay amounts drawn on short-term credit facilities for capital expenditures and to refinance $30 million of Medium-Term Notes recalled by Alagasco in April 2004. In November 2005, Alagasco issued an additional $80 million of long-term debt largely to refinance $18 million of Medium-Term Notes maturing June 27, 2007 to July 5, 2022 and $56.7 million of long-term debt maturing June 15, 2015 to June 27, 2025 recalled by Alagasco in August 2005 and December 2005, respectively.

Access to capital is an integral part of the Company’s business plan. The Company regularly provides information to corporate rating agencies related to current business activities and future performance expectations. While the Company expects to have ongoing access to its short-term credit facilities and the broader long-term markets, continued access could be adversely affected by future economic and business conditions or credit rating downgrades. Energen and Alagasco’s corporate credit ratings are currently rated BBB+ with a stable outlook by Standard & Poor’s. Moody’s Investors Service has currently rated Energen as Baa 2 senior unsecured and Alagasco as A1 senior unsecured with a stable outlook.

Dividends

Energen expects to pay annual cash dividends of $0.46 per share on the Company’s common stock in 2007. The amount and timing of all dividend payments is subject to the discretion of the Board of Directors and is based upon business conditions, results of operations, financial conditions and other factors.

On April 27, 2005, Energen’s shareholders approved a 2-for-1 split of the Company’s common stock. The split was effected in the form of a 100 percent stock dividend and was effective on June 1, 2005, to shareholders of record on May 13, 2005. All share and per share amounts of capital stock outstanding have been adjusted to reflect the stock split.

Contractual Cash Obligations and Other Commitments

In the course of ordinary business activities, Energen enters into a variety of contractual cash obligations and other commitments. The following table summarizes the Company’s significant contractual cash obligations, other than hedging contracts, as of December 31, 2006.

	Payments Due before December 31,
(in thousands)	Total		2007		2008-2009		2010-2011		2012 and Thereafter
Short-term debt	$	58,000	$	58,000	$	—	$	—	$	—
Long-term debt(1)		683,756		100,000		10,000		155,000		418,756
Interest payments on debt(2)		499,473		43,957		76,445		64,061		315,010
Purchase obligations(3)		211,971		47,904		99,939		41,941		22,187
Capital lease obligations		—		—		—		—		—
Operating leases		46,177		3,772		6,582		6,234		29,589
Asset retirement obligations(4)		462,078		4,433		2,682		6,509		448,454
Total contractual cash obligations	$	1,961,455	$	258,066	$	195,648	$	273,745	$	1,233,996

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(1) Long-term cash obligations include $1.3 million of unamortized debt discounts as of December 31, 2006.

(2) Includes interest on fixed rate debt and an estimate of adjustable rate debt. The adjustable rate interest is calculated based on the indexed rate in effect at December 31, 2006.

(3) Certain of the Company’s long-term gas procurement contracts for the supply, storage and delivery of natural gas include fixed charges of $212 million through October 2015. The Company also is committed to purchase minimum quantities of gas at market-related prices or to pay certain costs in the event the minimum quantities are not taken. These purchase commitments are approximately 156.3 Bcf through April 2015.

(4) Represents the estimated future asset retirement obligation on an undiscounted basis.

Energen Resources operates in certain instances through joint ventures under joint operating agreements. Typically, the operator under a joint operating agreement enters into contracts, such as drilling contracts, for the benefit of all joint venture partners. Through the joint operating agreement, the non-operators reimburse, and in some cases advance, the funds necessary to meet the contractual obligations entered into by the operator. These obligations are typically shared on a working interest basis as defined in the joint operating contractual agreement.

The Company has two defined non-contributory pension plans and provides certain postretirement healthcare and life insurance benefits. The Company is not required to make any funding payments during 2007 for the pension plans and does not currently plan to make discretionary contributions. The Company expects to make discretionary payments of approximately $371,000 to postretirement benefit program assets during 2007.

OUTLOOK

Oil and Gas Operations:Energen Resources plans to continue to implement its growth strategy with capital spending in 2007 through 2009 as outlined above. Production in 2007 is estimated to be approximately 95 Bcfe, including 93.5 Bcfe of estimated production from proved reserves owned at December 31, 2006. In 2008, production is estimated to range from 97 to 99 Bcfe, including approximately 92 Bcfe produced from proved reserves currently owned. Production in 2009 could be in excess of 100 Bcfe. Production estimates above do not include amounts for potential future acquisitions or Alabama shales.

In the event Energen Resources is unable to fully invest in its capital investment opportunities, future operating revenues, production and proved reserves could be negatively affected. Energen Resources’ major market risk exposure is in the pricing applicable to its oil and gas production. Historically, prices received for oil and gas production have been volatile because of seasonal weather patterns, national supply and demand factors and general economic conditions. Crude oil prices also are affected by quality differentials, worldwide political developments and actions of the Organization of Petroleum Exporting Countries. Basis differentials, like the underlying commodity prices, can be volatile because of regional supply and demand factors, including seasonal variations and the availability and price of transportation to consuming areas.

Revenues and related accounts receivable from oil and gas operations primarily are generated from the sale of produced natural gas and oil to energy marketing companies. Such sales are typically made on an unsecured credit basis with payment due the month following delivery. This concentration of sales to the energy marketing industry has the potential to affect the Company’s overall exposure to credit risk, either positively or negatively, in that the Company’s oil and gas purchasers may be affected similarly by changes in economic, industry or other conditions. Energen Resources considers the credit quality of its customers and, in certain instances, may require credit assurances such as a deposit, letter of credit or parent guarantee. The three largest oil and gas purchasers account for approximately 34 percent, 13 percent and 11 percent, respectively, of Energen Resources’ estimated 2007 production. Energen Resources’ other purchasers each bought less than 9 percent of production.

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Energen Resources periodically enters into derivative commodity instruments that qualify as cash flow hedges under SFAS No. 133 to hedge its price exposure to its estimated oil, natural gas and natural gas liquids production. Such instruments may include regulated natural gas and crude oil futures contracts traded on the New York Mercantile Exchange (NYMEX) and over-the-counter swaps, collars and basis hedges with major energy derivative product specialists. The counterparties to the commodity instruments are investment banks and energy-trading firms. In some contracts, the amount of credit allowed before Energen Resources must post collateral for out-of-the-money hedges varies depending on the credit rating of the Company. In cases where these arrangements exist, the credit ratings must be maintained at investment grade status to have any available counterparty credit. Adverse changes to the Company’s credit rating results in decreasing amounts of credit available under these contracts. The counterparties for these contracts do not extend credit to the Company in the event credit ratings are below investment grade. At December 31, 2006, Energen Resources was in a net gain position with all but two counterparties and was not required to post collateral. Energen Resources uses various counterparties for its over-the-counter derivatives. As of December 31, 2006, three counterparties represented approximately 94 percent of Energen Resources’ gain on fair value of derivatives. The Company believes the creditworthiness of these counterparties is satisfactory. Hedge transactions are pursuant to standing authorizations by the Board of Directors, which do not permit speculative positions. Energen Resources does not hedge more than 80 percent of its estimated annual production and generally does not hedge this production more than two years forward. Production may be hedged for a longer period immediately following an acquisition in order to protect targeted returns.

Energen Resources entered into the following transactions for 2007 and subsequent years:

Production Period	Total Hedged Volumes	Average Contract Price	Description
Natural Gas
2007	13.2 Bcf	$9.27 Mcf	NYMEX Swaps
	29.4 Bcf	$7.88 Mcf	Basin Specific Swaps
Oil
2007	2,716 MBbl	$70.01 Bbl	NYMEX Swaps
2008	1,920 MBbl	$66.89 Bbl	NYMEX Swaps
2009	900 MBbl	$56.25 Bbl	NYMEX Swaps
Oil Basis Differential
2007	2,368 MBbl	**	Basis Swaps
2008	1,020 MBbl	**	Basis Swaps
Natural Gas Liquids
2007	44.9 MMGal	$0.93 Gal	Liquids Swaps

** Average contract prices not meaningful due to the varying nature of each contract

The Company has prepared a sensitivity analysis to evaluate the hypothetical effect that changes in the market value of crude oil, natural gas and natural gas liquids may have on the fair value of its derivative instruments. This analysis measured the impact on the commodity derivative instruments and, thereby, did not consider the underlying exposure related to the commodity. At December 31, 2006, the Company estimated that a 10 percent increase or decrease in the commodities prices would have resulted in a $65.4 million change in the fair value of open derivative contracts; however, gains and losses on derivative contracts are expected to be similarly offset by sales at the spot market price. The hypothetical change in fair value was calculated by multiplying the difference between the hypothetical price and the contractual price by the contractual volumes and did not include the impact of related taxes on actual cash prices.

Natural Gas Distribution:The extension of RSE in June 2002 provides Alagasco the opportunity to continue earning an allowed ROE between 13.15 percent and 13.65 percent through January 1, 2008. Under the terms of that extension, RSE will continue beyond that date, unless, after notice to the Company and a hearing, the APSC votes to modify or discontinue its operations. Alagasco’s rate schedules for natural gas distribution charges contain a Gas Supply Adjustment rider which permits the pass-through to customers for changes in the cost of gas supply. Also as discussed in Note 2, Regulatory Matters, in the Notes to Financial Statements, the utility’s CCM is based in part on the number of customers and the rate of inflation. Continued low inflation, significantly higher gas prices resulting in increased bad debt expense and/or the lack of customer growth could impact the utility’s ability to manage its

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O&M expense per customer sufficiently for the inflation-based cost control requirements of RSE and may result in an average return on equity lower than the allowed range of return. Over this period, Alagasco has the potential for net income growth as the investment in additional utility plant affects the level of equity required in the business. The utility continues to rely on rate flexibility to effectively prevent bypass of its distribution system.

As required by SFAS No. 133, Alagasco recognizes all derivatives at fair value as either assets or liabilities on the balance sheet. Any gains or losses are passed through to customers using the mechanisms of the GSA in compliance with Alagasco’s APSC-approved tariff and are recognized as a regulatory asset or regulatory liability as required by SFAS No. 71. At December 31, 2006, Alagasco recorded an $11.5 million loss as a liability in accounts payable with a corresponding current regulatory asset of $11.5 million representing the fair value of derivatives. The gains or losses related to these derivative contracts, as adjusted for any changes in the fair value, will be recognized in the GSA during the first quarter of 2007.

Forward-Looking Statements:Certain statements in this report express expectations of future plans, objectives and performance of the Company and its subsidiaries and constitute forward-looking statements made pursuant to the Safe Harbor provision of the Private Securities Litigation Reform Act of 1995. Except as otherwise disclosed, the Company’s forward-looking statements do not reflect the impact of possible or pending acquisitions, investments, divestitures or restructurings. The absence of errors in input data, calculations and formulas used in estimates, assumptions and forecasts cannot be guaranteed. Neither the Company nor Alagasco undertakes any obligation to correct or update any forward-looking statements whether as a result of new information, future events or otherwise.

All statements based on future expectations rather than on historical facts are forward-looking statements that are dependent on certain events, risks and uncertainties that could cause actual results to differ materially from those anticipated. Some of these include, but are not limited to, economic and competitive conditions, inflation rates, legislative and regulatory changes, financial market conditions, our ability to access the capital markets, future business decisions, utility customer growth and retention and usage per customer, litigation results and other uncertainties, all of which are difficult to predict.

Third Party Facilities: The forward looking statements also assume generally uninterrupted access to third party oil and gas gathering, transportation, processing and storage facilities. Energen Resources relies upon such facilities for access to markets for its production. Alagasco relies upon such facilities for access to natural gas supplies. Such facilities are typically limited in number and geographically concentrated. An extended interruption of access to or service from these facilities, whether caused by weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could result in material adverse financial consequences to Alagasco, Energen Resources and/or the Company.

Energen Resources’ Production: There are numerous uncertainties inherent in estimating quantities of proved oil and gas reserves and in projecting future rates of production and timing of development expenditures. The total amount or timing of actual future production may vary significantly from reserve and production estimates. In the event Energen Resources is unable to fully invest its planned acquisition, development and exploratory expenditures, future operating revenues, production, and proved reserves could be negatively affected. The drilling of development and exploratory wells can involve significant risks, including those related to timing, success rates and cost overruns, and these risks can be affected by lease and rig availability, complex geology and other factors.

Energen Resources’ Hedging: Although Energen Resources makes use of futures, swaps and fixed-price contracts to mitigate price risk, fluctuations in future oil, gas and natural gas liquids prices could materially affect the Company’s financial position, results of operations and cash flows; furthermore, such risk mitigation activities may cause the Company’s financial position and results of operations to be materially different from results that would have been obtained had such risk mitigation activities not occurred. The effectiveness of such risk mitigation assumes that counterparties maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that actual sales volumes will generally meet or exceed the volumes subject to the futures, swaps and fixed price contracts. A substantial failure to meet sales volume targets whether caused by miscalculations, weather events, natural disaster, accident, criminal act or otherwise, could leave Energen Resources financially exposed to

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its counterparties and result in material adverse financial consequences to Energen Resources and the Company. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Energen Resources’ position.

Alagasco’s Hedging:Similarly, although Alagasco makes use of futures, swaps and fixed-price contracts to mitigate gas supply cost risk, fluctuations in future gas supply costs could materially affect its financial position and rates to customers. The effectiveness of Alagasco’s risk mitigation assumes that its counterparties in such activities maintain satisfactory credit quality. The effectiveness of such risk mitigation also assumes that Alagasco’s actual gas supply needs will generally meet or exceed the volumes subject to the futures, swaps and fixed price contracts. A substantial failure to experience projected gas supply needs, whether caused by miscalculations, weather events, natural disaster, accident, mechanical failure, criminal act or otherwise, could leave Alagasco financially exposed to its counterparties and result in material adverse financial consequences to Alagasco and the Company. The adverse effect could be increased if the adverse event was widespread enough to move market prices against Alagasco’s position.

Operations: Inherent in the gas distribution activities of Alagasco and the oil and gas production activities of Energen Resources are a variety of hazards and operation risks, such as leaks, explosions and mechanical problems that could cause substantial financial losses. In addition, these risks could result in loss of human life, significant damage to property, environmental pollution, impairment of operations and substantial losses to the Company. In accordance with customary industry practices, the Company maintains insurance against some, but not all, of these risks and losses. The location of pipeline and storage facilities near populated areas, including residential areas, commercial business centers and industrial sites, could increase the level of damages resulting from these risks. The occurrence of any of these events could adversely affect Alagasco’s, Energen Resources’ and/or the Company’s financial position, results of operations and cash flows.

Alagasco’s Service Territory: Alagasco’s utility customers are geographically concentrated in central and north Alabama. Significant economic, weather, natural disaster, criminal act or other events that adversely affect this region could adversely affect Alagasco and the Company.

RECENT PRONOUNCEMENTS OF THE FINANCIAL ACCOUNTING STANDARDS BOARD (FASB)

In June 2006, the FASB issued FASB Interpretation No. 48, “Accounting for Uncertainty in Income Taxes-an Interpretation of FASB Statement No. 109” (FIN 48) to address accounting for uncertainty in tax positions. This Interpretation prescribed a recognition threshold and measurement attribute for the financial statement recognition, measurement and disclosure of a tax position taken or expected to be taken in a tax return. FIN 48 is effective for fiscal years beginning after December 15, 2006. The Company has analyzed FIN 48 and does not expect the adoption of this Interpretation will have a material impact to the Company. The cumulative effect of applying this Interpretation will be recorded as a decrease to retained earnings as of January 1, 2007, in an amount not expected to exceed $1 million.

During September 2006, the FASB issued SFAS No. 157, “Fair Value Measurements,” which clarifies the principle that fair value should be based on the assumptions market participants would use when pricing an asset or a liability and establishes a fair value hierarchy that prioritizes the information used to develop those assumptions. Under SFAS No. 157, fair value measurements would be separately disclosed by level within the fair value hierarchy effective for fiscal years beginning after November 15, 2007. The Company is currently evaluating the impact of this Statement.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The information required by this item with respect to market risk is set forth in Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations under the heading “Outlook” and in Note 8, Financial Instruments and Risk Management, in the Notes to Financial Statements.

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ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

ENERGEN CORPORATION

ALABAMA GAS CORPORATION

INDEX TO FINANCIAL STATEMENTS

AND FINANCIAL STATEMENT SCHEDULES

		Page
1.	Financial Statements
	Energen Corporation
	Report of Independent Registered Public Accounting Firm	36
	Consolidated Statements of Income for the years ended December 31, 2006, 2005 and 2004	38
	Consolidated Balance Sheets as of December 31, 2006 and 2005	39
	Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2006, 2005 and 2004	41
	Consolidated Statements of Cash Flows for the years ended December 31, 2006, 2005 and 2004	42
	Notes to Financial Statements	48
	Alabama Gas Corporation
	Report of Independent Registered Public Accounting Firm	36
	Statements of Income for the years ended December 31, 2006, 2005 and 2004	43
	Balance Sheets as of December 31, 2006 and 2005	44
	Statements of Shareholder’s Equity for the years ended December 31, 2006, 2005 and 2004	46
	Statements of Cash Flows for the years ended December 31, 2006, 2005 and 2004	47
	Notes to Financial Statements	48
2.	Financial Statement Schedules
	Energen Corporation
	Schedule II - Valuation and Qualifying Accounts	80
	Alabama Gas Corporation
	Schedule II - Valuation and Qualifying Accounts	80

Schedules other than those listed above are omitted because they are not required, not applicable, or the required information is shown in the financial statements or notes thereto.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of Energen Corporation:

We have completed integrated audits of Energen Corporation’s consolidated financial statements and of its internal control over financial reporting as of December 31, 2006, in accordance with the standards of the Public Company Accounting Oversight Board (United States). Our opinions, based on our audits, are presented below.

Consolidated financial statements and financial statement schedule

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of Energen Corporation and its subsidiaries at December 31, 2006 and 2005, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2006 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit of financial statements includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

As discussed in Note 5 of the Notes to the Consolidated Financial Statements, at December 31, 2006, the Company adopted SFAS No. 158, “Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, an amendment of FASB Statements No. 87, 88, 106 and 132 (R).”

Internal control over financial reporting

Also, in our opinion, management’s assessment, included in Management’s Report on Internal Control over Financial Reporting appearing under Item 9A, that the Company maintained effective internal control over financial reporting as of December 31, 2006 based on criteria established inInternal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), is fairly stated, in all material respects, based on those criteria. Furthermore, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2006, based on criteria established inInternal Control - Integrated Framework issued by the COSO. The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express opinions on management’s assessment and on the effectiveness of the Company’s internal control over financial reporting based on our audit. We conducted our audit of internal control over financial reporting in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. An audit of internal control over financial reporting includes obtaining an understanding of internal control over financial reporting, evaluating management’s assessment, testing and evaluating the design and operating effectiveness of internal control, and performing such other procedures as we consider necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting

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includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

PricewaterhouseCoopers LLP

Birmingham, Alabama

February 27, 2007

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholder of Alabama Gas Corporation:

In our opinion, the financial statements of Alabama Gas Corporation listed in the accompanying index present fairly, in all material respects, the financial position of Alabama Gas Corporation at December 31, 2006 and 2005, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2006 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related financial statements. These financial statements and financial statement schedule are the responsibility of the Company’s management; our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

As discussed in Note 5 of the Notes to the Consolidated Financial Statements, at December 31, 2006, the Company adopted SFAS No. 158, “Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, an amendment of FASB Statements No. 87, 88, 106 and 132 (R).”

PricewaterhouseCoopers LLP

Birmingham, Alabama

February 27, 2007

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CONSOLIDATED STATEMENTS OF INCOME

Energen Corporation

Years ended December 31, (in thousands, except share data)	2006			2005			2004
Operating Revenues
Oil and gas operations	$	730,542		$	527,694		$	410,117
Natural gas distribution		663,444			600,700			526,740
Total operating revenues		1,393,986			1,128,394			936,857
Operating Expenses
Cost of gas		373,097			315,622			259,889
Operations and maintenance		302,157			268,727			234,150
Depreciation, depletion and amortization		142,086			131,691			120,777
Taxes, other than income taxes		95,727			93,983			74,933
Accretion expense		3,619			2,647			2,265
Total operating expenses		916,686			812,670			692,014
Operating Income		477,300			315,724			244,843
Other Income (Expense)
Interest expense		(48,652	)		(46,800	)		(42,743	)
Other income		951			2,163			2,945
Other expense		(1,046	)		(710	)		(2,215	)
Total other expense		(48,747	)		(45,347	)		(42,013	)
Income From Continuing Operations Before Income Taxes		428,553			270,377			202,830
Income tax expense		155,030			97,491			75,525
Income From Continuing Operations		273,523			172,886			127,305
Discontinued Operations, Net of Taxes
Income (loss) from discontinued operations		(6	)		(6	)		163
Gain (loss) on disposal of discontinued operations		53			132			(5	)
Income From Discontinued Operations		47			126			158
Net Income	$	273,570		$	173,012		$	127,463
Diluted Earnings Per Average Common Share*
Continuing operations	$	3.73		$	2.35		$	1.74
Discontinued operations		—			—			—
Net Income	$	3.73		$	2.35		$	1.74
Basic Earnings Per Average Common Share*
Continuing operations	$	3.77		$	2.37		$	1.75
Discontinued operations		—			—			0.01
Net Income	$	3.77		$	2.37		$	1.76
Diluted Average Common Shares Outstanding*		73,278,277			73,714,602			73,117,253
Basic Average Common Shares Outstanding*		72,504,897			73,051,903			72,546,512

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

The accompanying Notes to Financial Statements are an integral part of these statements.

38

CONSOLIDATED BALANCE SHEETS

Energen Corporation

	December 31, 2006		December 31, 2005
(in thousands)
ASSETS
Current Assets
Cash and cash equivalents	$	10,307	$	8,714
Accounts receivable, net of allowance for doubtful accounts of $13,961 and $11,573 at December 31, 2006 and 2005, respectively		329,766		285,765
Inventories, at average cost
Storage gas inventory		68,769		71,179
Materials and supplies		9,281		7,926
Liquified natural gas in storage		3,766		3,795
Regulatory asset		35,479		6,633
Deferred income taxes		—		72,113
Prepayments and other		32,211		22,366
Total current assets		489,579		478,491
Property, Plant and Equipment
Oil and gas properties, successful efforts method		2,163,065		1,930,291
Less accumulated depreciation, depletion and amortization		559,059		466,643
Oil and gas properties, net		1,604,006		1,463,648
Utility plant		1,060,562		999,011
Less accumulated depreciation		421,075		401,232
Utility plant, net		639,487		597,779
Other property, net		8,921		6,584
Total property, plant and equipment, net		2,252,414		2,068,011
Other Assets
Regulatory asset		38,385		33,436
Prepaid pension costs and postretirement assets		19,975		—
Deferred charges and other		36,534		38,288
Total other assets		94,894		71,724
TOTAL ASSETS	$	2,836,887	$	2,618,226

The accompanying Notes to Financial Statements are an integral part of these statements.

39

CONSOLIDATED BALANCE SHEETS

Energen Corporation

(in thousands, except share data)	December 31, 2006			December 31, 2005
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities
Long-term debt due within one year	$	100,000		$	15,000
Notes payable to banks		58,000			153,000
Accounts payable		194,448			306,618
Accrued taxes		42,960			44,324
Customers’ deposits		21,094			20,767
Amounts due customers		14,382			6,181
Accrued wages and benefits		24,548			33,634
Regulatory liability		33,871			53,496
Deferred income taxes		15,354			—
Other		65,985			55,289
Total current liabilities		570,642			688,309
Long-term debt		582,490			683,236
Deferred Credits and Other Liabilities
Asset retirement obligation		53,980			50,270
Pension liabilities		32,504			15,739
Regulatory liability		135,466			119,808
Deferred income taxes		241,146			148,040
Other		18,590			20,146
Total deferred credits and other liabilities		481,686			354,003
Commitments and Contingencies
Shareholders’ Equity
Preferred stock, cumulative, $0.01 par value, 5,000,000 shares authorized		—			—
Common shareholders’ equity
Common stock, $0.01 par value; 150,000,000 shares authorized, 73,699,244 shares issued at December 31, 2006 and 73,493,337 shares issued at December 31, 2005		737			735
Premium on capital stock		412,989			394,861
Capital surplus		2,802			2,802
Retained earnings		844,880			603,314
Accumulated other comprehensive loss, net of tax
Unrealized gain (loss) on hedges		50,555			(92,112	)
Pension and postretirement plans, net of tax		(23,177	)		(13,707	)
Deferred compensation on restricted stock		—			(2,123	)
Deferred compensation plan		13,956			11,907
Treasury stock, at cost; 3,253,337 shares and 1,066,935 shares at December 31, 2006 and 2005, respectively		(100,673	)		(12,999	)
Total shareholders’ equity		1,202,069			892,678
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$	2,836,887		$	2,618,226

The accompanying Notes to Financial Statements are an integral part of these statements.

40

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

Energen Corporation

(in thousands, except share data)	Common Stock			Premium on Capital Stock			Capital Surplus		Retained Earnings			Accumulated Other Comprehensive Income (Loss)			Deferred Compensation Restricted Stock			Deferred Compensation Plan			Treasury Stock			Total Shareholders’ Equity
	Number of Shares	Par Value
BALANCE DECEMBER 31, 2003	72,447,062	$	724	$	367,769		$	2,802	$	359,635		$	(30,595	)	$	(1,258	)	$	17,063		$	(17,108	)	$	699,032
Net income										127,463															127,463
Other comprehensive income (loss):
Current period change in fair value of derivative instruments, net of tax of ($34,012)													(56,430	)											(56,430	)
Reclassification adjustment, net of tax of $32,286													52,678												52,678
Minimum pension liability, net of tax of ($1,608)													(2,983	)											(2,983	)
Comprehensive income																									120,728
Purchase of treasury shares																						(836	)		(836	)
Shares issued for:
Dividend reinvestment plan	2,550		—		53																				53
Employee benefit plans	716,346		8		9,112																	427			9,547
Deferred compensation obligation																			11,856			(11,856	)		—
Issuance of restricted stock																(2,807	)								(2,807	)
Amortization of restricted stock																1,390									1,390
Stock based compensation					465																				465
Tax benefit from employee stock plans					1,275																				1,275
Long-range performance plan					2,291																				2,291
Cash dividends - $0.3775 per share										(27,472	)														(27,472	)
BALANCE DECEMBER 31, 2004	73,165,958		732		380,965			2,802		459,626			(37,330	)		(2,675	)		28,919			(29,373	)		803,666
Net income										173,012															173,012
Other comprehensive income (loss):
Current period change in fair value of derivative instruments, net of tax of ($100,484)													(163,947	)											(163,947	)
Reclassification adjustment, net of tax of $59,636													97,301												97,301
Minimum pension liability, net of tax of ($990)													(1,843	)											(1,843	)
Comprehensive income																									104,523
Purchase of treasury shares																						(2,459	)		(2,459	)
Shares issued for:
Employee benefit plans	327,379		3		8,958																	1,821			10,782
Deferred compensation obligation																			(17,012	)		17,012			—
Issuance of restricted stock																(1,249	)								(1,249	)
Amortization of restricted stock																1,801									1,801
Stock based compensation					465																				465
Tax benefit from employee stock plans					2,487																				2,487
Long-range performance plan					1,986																				1,986
Cash dividends - $0.40 per share										(29,324	)														(29,324	)
BALANCE DECEMBER 31, 2005	73,493,337		735		394,861			2,802		603,314			(105,819	)		(2,123	)		11,907		$	(12,999	)		892,678
Net income										273,570															273,570
Other comprehensive income (loss):
Current period change in fair value of derivative instruments, net of tax of $79,827													130,244												130,244
Reclassification adjustment, net of tax of $7,614													12,423												12,423
Minimum pension liability, net of tax of $3,062													5,686												5,686
Comprehensive income																									421,923
Adjustment to initially apply SFAS No. 158, net of tax of ($8,161)													(15,156	)											(15,156	)
Purchase of treasury shares																						(87,566	)		(87,566	)
Shares issued for:
Employee benefit plans	205,907		2		1,444																	1,941			3,387
Deferred compensation obligation																			2,049			(2,049	)		—
Reclassification of restricted stock awards					(2,123	)										2,123									—
Amortization of restricted stock					2,252																				2,252
Stock based compensation					196																				196
Tax benefit from employee stock plans					1,980																				1,980
Long-range performance plan					14,501																				14,501
Estimated forfeitures on stock based awards					(122	)																			(122	)
Cash dividends - $0.44 per share										(32,004	)														(32,004	)
BALANCE DECEMBER 31, 2006	73,699,244	$	737	$	412,989		$	2,802	$	844,880		$	27,378		$	—		$	13,956		$	(100,673	)	$	1,202,069

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

The accompanying Notes to Financial Statements are an integral part of these statements.

41

CONSOLIDATED STATEMENTS OF CASH FLOWS

Energen Corporation

Years ended December 31, (in thousands)	2006			2005			2004
Operating Activities
Net income	$	273,570		$	173,012		$	127,463
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization		142,086			131,719			120,960
Deferred income taxes		98,209			58,608			67,423
Deferred investment tax credits		—			—			(308	)
Change in derivative fair value		(2,043	)		2,328			212
Gain on sale of assets		(55,916	)		(1,928	)		(135	)
Other, net		4,255			(5,912	)		(11,908	)
Net change in:
Accounts receivable, net		9,249			(70,944	)		(39,645	)
Inventories		1,084			(20,276	)		(10,818	)
Accounts payable		64,178			39,330			19,536
Amounts due customers		(38,940	)		12,890			(1,166	)
Other current assets and liabilities		(12,812	)		16,297			19,518
Net cash provided by operating activities		482,920			335,124			291,132
Investing Activities
Additions to property, plant and equipment		(302,177	)		(230,715	)		(177,705	)
Acquisitions, net of cash acquired		(27,814	)		(179,268	)		(274,400	)
Proceeds from sale of assets		75,429			10,832			461
Other, net		(2,337	)		(1,573	)		(1,770	)
Net cash used in investing activities		(256,899	)		(400,724	)		(453,414	)
Financing Activities
Payment of dividends on common stock		(32,004	)		(29,324	)		(27,472	)
Issuance of common stock		833			10,782			9,600
Purchase of treasury stock		(84,339	)		(2,459	)		(836	)
Reduction of long-term debt		(15,898	)		(84,796	)		(40,083	)
Proceeds from issuance of long-term debt		—			160,000			100,000
Debt issuance costs		—			(2,378	)		(565	)
Net change in short-term debt		(95,000	)		18,000			124,000
Other		1,980			—			—
Net cash provided by (used in) financing activities		(224,428	)		69,825			164,644
Net change in cash and cash equivalents		1,593			4,225			2,362
Cash and cash equivalents at beginning of period		8,714			4,489			2,127
Cash and cash equivalents at end of period	$	10,307		$	8,714		$	4,489

The accompanying Notes to Financial Statements are an integral part of these statements.

42

STATEMENTS OF INCOME

Alabama Gas Corporation

Years ended December 31, (in thousands)	2006			2005			2004
Operating Revenues	$	663,444		$	600,700		$	526,740
Operating Expenses
Cost of gas		373,097			318,269			261,800
Operations and maintenance		126,948			126,041			121,896
Depreciation		44,244			42,351			39,881
Income taxes
Current		19,745			20,556			9,690
Deferred		2,257			1,804			10,321
Deferred investment tax credits		—			—			(308	)
Taxes, other than income taxes		44,881			41,117			36,964
Total operating expenses		611,172			550,138			480,244
Operating Income		52,272			50,562			46,496
Other Income (Expense)
Allowance for funds used during construction		951			792			1,247
Other income		1,490			1,371			1,979
Other expense		(961	)		(701	)		(2,195	)
Total other income		1,480			1,462			1,031
Interest Charges
Interest on long-term debt		12,836			13,752			10,672
Other interest charges		3,618			1,308			3,065
Total interest charges		16,454			15,060			13,737
Net Income	$	37,298		$	36,964		$	33,790

The accompanying Notes to Financial Statements are an integral part of these statements.

43

BALANCE SHEETS

Alabama Gas Corporation

(in thousands)	December 31, 2006			December 31, 2005
ASSETS
Property, Plant and Equipment
Utility plant	$	1,060,562		$	999,011
Less accumulated depreciation		421,075			401,232
Utility plant, net		639,487			597,779
Other property, net		163			169
Current Assets
Cash		8,765			7,169
Accounts receivable
Gas		159,101			194,447
Other		10,708			7,524
Affiliated companies		—			3,215
Allowance for doubtful accounts		(13,200	)		(10,800	)
Inventories, at average cost
Storage gas inventory		68,769			71,179
Materials and supplies		4,199			4,144
Liquified natural gas in storage		3,766			3,795
Regulatory asset		35,479			6,633
Deferred income taxes		13,251			13,284
Prepayments and other		3,557			11,203
Total current assets		294,395			311,793
Other Assets
Regulatory asset		38,385			33,436
Prepaid pension costs and postretirement assets		15,369			—
Deferred charges and other		6,326			6,857
Total other assets		60,080			40,293
TOTAL ASSETS	$	994,125		$	950,034

The accompanying Notes to Financial Statements are an integral part of these statements.

44

BALANCE SHEETS

Alabama Gas Corporation

(in thousands, except share data)	December 31, 2006		December 31, 2005
LIABILITIES AND CAPITALIZATION
Capitalization
Preferred stock, cumulative, $0.01 par value, 120,000 shares authorized	$	—	$	—
Common shareholder’s equity
Common stock, $0.01 par value; 3,000,000 shares authorized, 1,972,052 shares issued at December 31, 2006 and 2005, respectively		20		20
Premium on capital stock		31,682		31,682
Capital surplus		2,802		2,802
Retained earnings		250,560		236,957
Total common shareholder’s equity		285,064		271,461
Long-term debt		208,756		209,654
Total capitalization		493,820		481,115
Current Liabilities
Long-term debt due within one year		—		5,000
Notes payable to banks		58,000		55,000
Accounts payable		118,936		112,443
Affiliated companies		18,130		—
Accrued taxes		37,813		32,770
Customers’ deposits		21,094		20,767
Amounts due customers		14,382		6,181
Accrued wages and benefits		9,714		11,449
Regulatory liability		33,871		53,496
Other		8,225		8,694
Total current liabilities		320,165		305,800
Deferred Credits and Other Liabilities
Deferred income taxes		42,195		39,949
Regulatory liability		135,466		119,808
Customer advances for construction and other		2,479		3,362
Total deferred credits and other liabilities		180,140		163,119
Commitments and Contingencies
TOTAL LIABILITIES AND CAPITALIZATION	$	994,125	$	950,034

The accompanying Notes to Financial Statements are an integral part of these statements.

45

STATEMENTS OF SHAREHOLDER’S EQUITY

Alabama Gas Corporation

	Common Stock			Premium on Capital Stock		Capital Surplus		Retained Earnings			Total Shareholder’s Equity
(in thousands, except share data)	Number of Shares	Par Value
Balance December 31, 2003	1,972,052	$	20	$	31,682	$	2,802	$	215,869		$	250,373
Net income									33,790			33,790
Cash dividends									(26,144	)		(26,144	)
Balance December 31, 2004	1,972,052		20		31,682		2,802		223,515			258,019
Net income									36,964			36,964
Cash dividends									(23,522	)		(23,522	)
Balance December 31, 2005	1,972,052		20		31,682		2,802		236,957			271,461
Net income									37,298			37,298
Cash dividends									(23,695	)		(23,695	)
Balance December 31, 2006	1,972,052	$	20	$	31,682	$	2,802	$	250,560		$	285,064

The accompanying Notes to Financial Statements are an integral part of these statements.

46

STATEMENTS OF CASH FLOWS

Alabama Gas Corporation

Years ended December 31, (in thousands)	2006			2005			2004
Operating Activities
Net income	$	37,298		$	36,964		$	33,790
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		44,244			42,351			39,881
Deferred income taxes		2,257			1,804			10,321
Deferred investment tax credits		—			—			(308	)
Other, net		(5,019	)		(3,025	)		(8,968	)
Net change in:
Accounts receivable, net		37,260			(48,623	)		(12,784	)
Inventories		2,384			(20,056	)		(9,406	)
Accounts payable		1,240			24,560			25,823
Amounts due customers		(38,940	)		12,890			(1,166	)
Other current assets and liabilities		3,190			9,371			8,128
Net cash provided by operating activities		83,914			56,236			85,311
Investing Activities
Additions to property, plant and equipment		(75,107	)		(72,388	)		(56,922	)
Net advances from (to) parent company		3,215			(1,025	)		(39,480	)
Other, net		(1,963	)		(1,551	)		(1,655	)
Net cash used in investing activities		(73,855	)		(74,964	)		(98,057	)
Financing Activities
Payment of dividends on common stock		(23,695	)		(23,522	)		(26,144	)
Reduction of long-term debt		(5,898	)		(84,796	)		(30,083	)
Proceeds from issuance of long-term debt		—			160,000			—
Debt issuance costs		—			(2,252	)		—
Net advances from parent company		18,130			—			—
Net change in short-term debt		3,000			(27,000	)		71,000
Net cash provided (used) by financing activities		(8,463	)		22,430			14,773
Net change in cash and cash equivalents		1,596			3,702			2,027
Cash and cash equivalents at beginning of period		7,169			3,467			1,440
Cash and cash equivalents at end of period	$	8,765		$	7,169		$	3,467

The accompanying Notes to Financial Statements are an integral part of these statements.

47

NOTES TO FINANCIAL STATEMENTS

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Energen Corporation (Energen or the Company) is a diversified energy holding company engaged primarily in the development, acquisition, exploration and production of oil and gas in the continental United States (oil and gas operations) and in the purchase, distribution, and sale of natural gas principally in central and north Alabama (natural gas distribution). The following is a description of the Company’s significant accounting policies and practices.

A. Principles of Consolidation

The accompanying consolidated financial statements include the accounts of the Company and its subsidiaries, principally Energen Resources Corporation and Alabama Gas Corporation (Alagasco), after elimination of all significant intercompany transactions in consolidation. Certain reclassifications have been made to conform the prior years’ financial statements to the current-year presentation.

B. Oil and Gas Operations

Property and Related Depletion: Energen Resources follows the successful efforts method of accounting for costs incurred in the exploration and development of oil, gas and natural gas liquid reserves. Lease acquisition costs are capitalized initially, and unproved properties are reviewed periodically to determine if there has been impairment of the carrying value, with any such impairment charged to exploration expense currently. All development costs are capitalized. Exploratory drilling costs are capitalized pending determination of proved reserves. If proved reserves are not discovered, the exploratory drilling costs are expensed. Other exploration costs, including geological and geophysical costs, are expensed as incurred. Depreciation, depletion and amortization expense is determined on a field-by-field basis using the units-of-production method based on proved reserves. Anticipated abandonment and restoration costs are capitalized and depreciated using the units-of-production method based on proved developed reserves. Gains and losses in the sale of certain oil and gas properties and any impairments of properties held-for-sale are reported as discontinued operations, with income or loss from operations of the associated properties reported as income or loss from discontinued operations. The results of operations for held-for-sale properties are reclassified and reported as discontinued operations for current and prior periods.

Operating Revenue: Energen Resources utilizes the sales method of accounting to recognize oil, gas and natural gas liquids production revenue. Under the sales method, revenues are based on actual sales volumes of commodities sold to purchasers. Over-production liabilities are established only when it is estimated that a property’s over-produced volumes exceed the net share of remaining reserves for such property. Energen Resources had no material production imbalances at December 31, 2006 and 2005.

Derivative Commodity Instruments: Energen Resources periodically enters into derivative commodity instruments to hedge its price exposure to its estimated oil, natural gas and natural gas liquids production. Such instruments may include regulated natural gas and crude oil futures contracts traded on the New York Mercantile Exchange (NYMEX) and over-the-counter swaps, collars and basis hedges with major energy derivative product specialists. The counterparties to the commodity instruments are investment banks and energy-trading firms. In some contracts, the amount of credit allowed before Energen Resources must post collateral for out-of-the-money hedges varies depending on the credit rating of the Company. In cases where these arrangements exist, the credit ratings must be maintained at investment grade status to have any available counterparty credit. Adverse changes to the Company’s credit rating results in decreasing amounts of credit available under these contracts. The counterparties for these contracts do not extend credit to the Company in the event credit ratings are below investment grade.

48

Energen Resources applies Statement of Financial Accounting Standard (SFAS) No. 133, “Accounting for Derivative Instruments and Hedging Activities,” as amended which requires all derivatives be recognized on the balance sheet and measured at fair value. If a derivative is designated as a cash flow hedge, the effectiveness of the hedge, or the degree that the gain (loss) for the hedging instrument offsets the loss (gain) on the hedged item is measured at each reporting period. The effective portion of the gain or loss on the derivative instrument is recognized in other comprehensive income as a component of shareholders’ equity and subsequently reclassified to operating revenues when the forecasted transaction affects earnings. The ineffective portion of a derivative’s change in fair value is recognized in operating revenues immediately. Derivatives that do not qualify for hedge treatment under SFAS No. 133 are recorded at fair value with gains or losses recognized in operating revenues in the period of change. All derivative transactions are included in operating activities on the Consolidated Statements of Cash Flows.

Additionally, the Company may also enter into derivatives that do not qualify for cash flow hedge accounting but are considered by management to represent valid economic hedges and are accounted for as mark-to-market transactions. These economic hedges may include, but are not limited to, basis hedges without a corresponding NYMEX hedge, put options and hedges on non-operated or other properties for which all of the necessary information to qualify for cash flow hedge accounting is either not readily available or subject to change.

All hedge transactions are pursuant to standing authorizations by the Board of Directors, which do not permit speculative positions. The Company formally documents all relationships between hedging instruments and hedged items at the inception of the hedge, as well as its risk management objective and strategy for undertaking the hedge. This process includes specific identification of the hedging instrument and the hedge transaction, the nature of the risk being hedged and how the hedging instrument’s effectiveness in hedging the exposure to the hedged transaction’s variability in cash flows attributable to the hedged risk will be assessed. Both at the inception of the hedge and on an ongoing basis, the Company assesses whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flows of hedged items. The Company discontinues hedge accounting if a derivative has ceased to be a highly effective hedge. The maximum term over which Energen Resources has hedged exposures to the variability of cash flows is through December 31, 2009.

C. Natural Gas Distribution

Utility Plant and Depreciation: Property, plant and equipment are stated at cost. The cost of utility plant includes an allowance for funds used during construction. Maintenance is charged for the cost of normal repairs and the renewal or replacement of an item of property which is less than a retirement unit. When property which represents a retirement unit is replaced or removed, the cost of such property is credited to utility plant and is charged to the accumulated reserve for depreciation. The estimated net removal costs on certain gas distribution assets is charged through depreciation and recognized as a regulatory liability in accordance with regulatory accounting. Depreciation is provided on the straight-line method over the estimated useful lives of utility property at rates established by the Alabama Public Service Commission (APSC). Approved depreciation rates averaged approximately 4.5 percent in the years ended December 31, 2006, 2005 and 2004.

Inventories: Inventories, which consist primarily of gas stored underground, are stated at average cost.

Operating Revenue and Gas Costs: Alagasco records natural gas distribution revenues in accordance with its tariff established by the APSC. The margin and gas costs on service delivered to cycle customers but not yet billed are recorded in current assets as accounts receivable with a corresponding regulatory liability. Gas imbalances are settled on a monthly basis. Alagasco had no material gas imbalances at December 31, 2006 and 2005.

Regulatory Accounting: Alagasco is subject to the provisions of SFAS No. 71, “Accounting for the Effects of Certain Types of Regulation.” In general, SFAS No. 71 requires utilities to capitalize or defer certain costs or revenues, based upon approvals received from regulatory authorities, to be recovered from or refunded to customers in future periods.

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Derivative Commodity Instruments:On December 4, 2000, the APSC authorized Alagasco to engage in energy-risk management activities. Accordingly, Alagasco from time to time enters into cash flow derivative commodity instruments to hedge its exposure to price fluctuations on its gas supply. As required by SFAS No. 133, Alagasco recognizes all derivatives as either assets or liabilities on the balance sheet. Any gains or losses are passed through to customers using the mechanisms of the Gas Supply Adjustment (GSA) rider in accordance with Alagasco’s APSC approved tariff and are recognized as a regulatory asset or regulatory liability as required by SFAS No. 71.

Taxes on revenues:Collections and payments of excise taxes are reported on a gross basis. These amounts are included in taxes other than income taxes on the consolidated statements of income as follows:

Years ended December 31, (in thousands)	2006		2005		2004
Taxes on revenues	$	33,983	$	30,899	$	27,002

The collection and payment of utility gross receipts tax and utility service use tax are presented on a net basis.

D. Income Taxes

The Company uses the liability method of accounting for income taxes in accordance with SFAS No. 109, “Accounting for Income Taxes.” Under this method, a deferred tax asset or liability is recognized for the estimated future tax effects attributable to temporary differences between the financial statement basis and the tax basis of assets and liabilities as well as tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period of the change. The Company and its subsidiaries file a consolidated federal income tax return. Consolidated federal income taxes are charged to appropriate subsidiaries using the separate return method.

E. Accounts Receivable and Allowance for Doubtful Accounts

Trade accounts receivable are recorded at the invoiced amounts and do not bear interest. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses in the existing accounts receivable. The Company determines the allowance based on historical experience and reviews the allowance for doubtful accounts monthly. Account balances are charged against the allowance when it is anticipated the receivable will not be recovered.

F. Cash Equivalents

The Company includes highly liquid marketable securities and debt instruments purchased with a maturity of three months or less in cash equivalents.

G. Earnings Per Share

The Company’s basic earnings per share amounts have been computed based on the weighted-average number of common shares outstanding. Diluted earnings per share amounts reflect the assumed issuance of common shares for all potentially dilutive securities (see Note 9).

H. Stock-Based Compensation

The Company adopted SFAS No. 123 (revised 2004), “Share-Based Payment” (SFAS No. 123R), using the modified prospective application method for new awards effective January 1, 2006. The Company previously adopted the fair value recognition provisions of SFAS No. 123 as amended, “Accounting for Stock-Based Compensation,” prospectively for stock-based compensation effective January 1, 2003. As a result, the adoption of SFAS No. 123R did not have a significant impact to the Company since the expensing provisions were voluntarily adopted in 2003.

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SFAS No. 123R requires that all share-based compensation awards be measured at fair value at the date of grant and expensed over the requisite vesting period. SFAS No. 123R requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if the actual forfeitures differ from those estimates. Prior to the adoption of SFAS No. 123R, the Company accounted for forfeitures upon occurrence. This change in method did not have a significant impact to the Company upon adoption of SFAS No. 123R.

The Company previously recognized all stock-based employee compensation expense over the stated vesting periods for each award. For awards granted prior to January 1, 2006, the Company recorded any unrecognized expense on the date of an employee’s retirement. For new awards granted to retirement eligible employees effective January 1, 2006, the Company began recognizing the entire compensation expense in the period of grant. If this method of expense recognition had been applied to all awards during 2006 and 2005, compensation expense would have been reduced by approximately $2.1 million and $0.8 million, respectively.During 2004, the Company would have recognized approximately $1.2 million of additional compensation expense. The Company utilized the long-form method of calculating the available pool of windfall tax benefit. For 2006, the Company recognized an excess tax benefit of $1.8 million related to its stock-based compensation.

The following table illustrates the effect on net income and diluted and basic earnings per share as if the Company had applied the fair value recognition provisions of SFAS No. 123, superseded by SFAS No. 123R, to all outstanding and unvested employee share-based awards during 2005 and 2004:

Years ended December 31, (in thousands)	2005			2004
Net income
As reported	$	173,012		$	127,463
Stock based compensation expense included in reported net income, net of tax		8,131			7,219
Stock based compensation expense determined under the fair value based method, net of tax		(6,238	)		(5,658	)
Pro forma	$	174,905		$	129,024
Diluted earnings per average common share*
As reported	$	2.35		$	1.74
Pro forma	$	2.37		$	1.76
Basic earnings per average common share*
As reported	$	2.37		$	1.76
Pro forma	$	2.39		$	1.78

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

There were no options granted in the years ended December 31, 2006 and 2005. In 2004, the Company used the Black-Scholes pricing model to calculate the fair values of the options awarded, which are included in the pro forma results above. Option awards were granted with an exercise price equal to the market price of the Company’s stock on the date of grant. For purposes of this valuation the following assumptions were used to derive the fair values: a seven-year option life based on historical experience; an annualized volatility rate, based on historical volatility, of 32.72 percent for the year ended December 31, 2004; a risk-free interest rate of 3.64 percent for the year ended December 31, 2004; and a dividend yield of 1.81 percent on options without dividend equivalents for the year ended December 31, 2004. Options with dividend equivalents assume no dividend yield for all periods presented. The weighted-average grant-date fair value for options granted without dividend equivalents during the year ended December 31, 2004 was $7.11.

I. Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period. The major estimates and assumptions identified by management include,

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but are not limited to, estimates of physical quantities of oil and gas reserves, periodic assessments of oil and gas properties for impairment, an assumption that SFAS No. 71 will continue as the applicable accounting standard for the Company’s regulated operations and estimates used in determining the Company’s obligations under its employee pension plans and asset retirement obligations. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may differ from the estimates.

J. Environmental Costs

Environmental compliance costs, including ongoing maintenance, monitoring and similar costs, are expensed as incurred. Environmental remediation costs are accrued when remedial efforts are probable and the cost can be reasonably estimated.

2. REGULATORY MATTERS

All of Alagasco’s utility operations are conducted in the state of Alabama. Alagasco is subject to regulation by the APSC which established the Rate Stabilization and Equalization (RSE) rate-setting process in 1983. RSE was extended with modifications in 2002, 1996, 1990, 1987 and 1985. On June 10, 2002, the APSC extended Alagasco’s rate-setting methodology, RSE, without change, for a six-year period through January 1, 2008. Under the terms of that extension, RSE will continue after January 1, 2008, unless, after notice to the Company and a hearing, the Commission votes to either modify or discontinue its operations. Alagasco is on a September 30 fiscal year for rate-setting purposes (rate year) and reports on a calendar year for the Securities and Exchange Commission and all other financial accounting reporting purposes. Alagasco’s allowed range of return on equity remains 13.15 percent to 13.65 percent throughout the term of the order, subject to change in the event that the Commission, following a generic rate of return hearing, adjusts the equity returns of all major energy utilities operating under a similar methodology. Under RSE the APSC conducts quarterly reviews to determine, based on Alagasco’s projections and year-to-date performance, whether Alagasco’s return on average equity at the end of the rate year will be within the allowed range of return. Reductions in rates can be made quarterly to bring the projected return within the allowed range; increases, however, are allowed only once each rate year, effective December 1, and cannot exceed 4 percent of prior-year revenues. Alagasco did not have a reduction in rates related to the return on average equity for rate years ended 2006 or 2004. As of September 30, 2005, Alagasco had a $3.3 million reduction in revenues to bring the return on average equity to midpoint within the allowed range of return. A $14.3 million, $15.8 million and $12.3 million annual increase in revenues became effective December 1, 2006, 2005, and 2004, respectively. RSE limits the utility’s equity upon which a return is permitted to 60 percent of total capitalization and provides for certain cost control measures designed to monitor Alagasco’s operations and maintenance (O&M) expense. Under the inflation-based cost control measurement established by the APSC, if the percentage change in O&M expense per customer falls within a range of 1.25 points above or below the percentage change in the Consumer Price Index For All Urban Consumers (index range), no adjustment is required. If the change in O&M expense per customer exceeds the index range, three-quarters of the difference is returned to customers. To the extent the change is less than the index range, the utility benefits by one-half of the difference through future rate adjustments. The increase in O&M expense per customer was above the index range for the rate years ended September 30, 2006 and 2004; as a result, the utility had a $1.5 million pre-tax and $1.2 million pre-tax, respectively, decrease in revenues with corresponding rate reductions under the provisions of RSE. Alagasco’s O&M expense fell within the index range for the rate year ended September 30, 2005.

Alagasco calculates a temperature adjustment to customers’ monthly bills to substantially remove the effect of departures from normal temperatures on Alagasco’s earnings. Adjustments to customers’ bills are made in the same billing cycle in which the weather variation occurs. The temperature adjustment applies primarily to residential, small commercial and small industrial customers. This adjustment, however, is subject to regulatory limitations on increases to customers’ bills. Other non-temperature weather related conditions that may affect customer usage are not included in the temperature adjustment such as the impact of wind velocity or cloud cover and the elasticity of demand as a result of higher commodity prices. Alagasco’s rate schedules for natural gas distribution charges contain a GSA rider, established in 1993, which permits the pass-through of changes in the cost of gas supply to customers.

The APSC approved an Enhanced Stability Reserve (ESR), beginning rate year 1998 with an approved maximum

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funding level of $4 million, to which Alagasco may charge the full amount of: (1) extraordinary O&M expenses resulting fromforce majeure events such as storms, severe weather, and outages, when one or a combination of two such events results in more than $200,000 of additional O&M expense during a rate year; or (2) individual industrial and commercial customer revenue losses that exceed $250,000 during the rate year, if such losses cause Alagasco’s return on average equity to fall below 13.15 percent. During the year ended December 31, 2004, Alagasco charged $0.3 million against the ESR related to extraordinary maintenance cost resulting from certain weather events within Alagasco’s service territory. Following a year in which a charge against the ESR is made, the APSC provides for accretions to the ESR of no more than $40,000 monthly until the maximum funding level is achieved. ESR balances of $4 million and $3.7 million at December 31, 2006 and 2005, respectively, are included in the consolidated financial statements.

The excess of total acquisition costs over book value of net assets of acquired municipal gas distribution systems is included in utility plant and is being amortized through Alagasco’s rate-setting mechanism on a straight-line basis over approximately 23 years. At December 31, 2006 and 2005, the net acquisition adjustments were $9.3 million and $10.4 million, respectively.

3. LONG-TERM DEBT AND NOTES PAYABLE

Long-term debt consisted of the following:

(in thousands)	December 31, 2006		December 31, 2005
Energen Corporation:
Medium-term Notes, Series A and B, interest ranging from 6.95% to 8.09%, for notes due July 15, 2008, to February 15, 2028	$	325,000	$	335,000
5% Notes, due October 1, 2013		50,000		50,000
Floating Rate Senior Notes (5.72% at December 31, 2006), due November 15, 2007		100,000		100,000
Alabama Gas Corporation:
Medium-term Notes, Series A, interest ranging from 7.57% to 7.97%, for notes due September 20, 2011, to September 23, 2026		15,000		20,000
6.75% Notes, due September 1, 2031		34,445		34,725
5.20% Notes, due January 15, 2020		40,000		40,000
5.70% Notes, due January 15, 2035		39,311		39,929
5.368% Notes, due December 1, 2015		80,000		80,000
Total		683,756		699,654
Less amounts due within one year		100,000		15,000
Less unamortized debt discount		1,266		1,418
Total	$	582,490	$	683,236

The aggregate maturities of Energen’s long-term debt for the next five years are as follows:

Years ending December 31,(in thousands)
2007	2008	2009	2010	2011
$ 100,000	$ 10,000	—	$ 150,000	$ 5,000

The aggregate maturities of Alagasco’s long-term debt for the next five years are as follows:

Years ending December 31,(in thousands)
2007	2008	2009	2010	2011
—	—	—	—	$ 5,000

The Company is in compliance with the covenants under its various long-term debt agreements. Except as discussed below, debt covenants address routine matters such as timely payment of principal and interest,

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maintenance of corporate existence and restrictions on liens. Of the Company’s outstanding debt, $300 million is subject to a cross default provision under Energen’s Indenture dated September 1, 1996 with The Bank of New York as Trustee. In the event Alagasco or Energen Resources had a debt default of more than $10 million it would also be considered an event of default by Energen under the 1996 Indenture. All of the Company’s debt is unsecured.

In January 2005, Alagasco issued $40 million of long-term debt with an interest rate of 5.2 percent due January 15, 2020 and $40 million of long-term debt with an interest rate of 5.7 percent due January 15, 2035. In November 2005, Alagasco issued $80 million of long-term debt with an interest rate of 5.368 percent due December 1, 2015. Alagasco used these long-term debt proceeds to repay amounts drawn on short-term credit facilities for capital expenditures and to refinance $30 million of Medium-Term Notes recalled by Alagasco in April 2004. Alagasco’s long-term debt proceeds were also used to refinance $18 million of Medium-Term Notes maturing June 27, 2007 to July 5, 2022 and $56.7 million of long-term debt maturing June 15, 2015 to June 27, 2025 recalled by Alagasco in August 2005 and December 2005, respectively.

Energen and Alagasco had short-term credit lines and other credit facilities with various financial institutions totaling $365 million and $340 million, respectively, available as of December 31, 2006, for working capital needs. Alagasco has been authorized to borrow a maximum of $200 million of its available credit lines at any one time by the APSC. The Company is in compliance with the covenants under the various short-term loan agreements and except as discussed below, debt covenants address routine matters. One of the Company’s credit facilities in the aggregate amount of $35 million, including $25 million for Energen and $10 million for Alagasco, has a covenant that the ratio of consolidated debt to consolidated capitalization will not exceed 0.65:1. As of December 31, 2006, the Company was in compliance with this requirement. The following is a summary of information relating to notes payable to banks:

(in thousands)	December 31, 2006			December 31, 2005
Energen outstanding	$	—		$	98,000
Alagasco outstanding		58,000			55,000
Notes payable to banks		58,000			153,000
Available for borrowings		307,000			167,000
Total	$	365,000		$	320,000
Energen maximum amount outstanding at any month-end	$	117,000		$	153,000
Energen average daily amount outstanding	$	63,658		$	17,688
Energen weighted average interest rates based on:
Average daily amount outstanding		5.32	%		3.57	%
Amount outstanding at year-end		5.70	%		4.81	%
Alagasco maximum amount outstanding at any month-end	$	58,000		$	55,000
Alagasco average daily amount outstanding	$	37,104		$	4,833
Alagasco weighted average interest rates based on:
Average daily amount outstanding		5.43	%		3.63	%
Amount outstanding at year-end		5.70	%		4.78	%

Energen’s total interest expense was $48,652,000, $46,800,000 and $42,743,000 for the years ended December 31, 2006, 2005 and 2004, respectively. Total interest expense for Alagasco was $16,454,000, $15,060,000 and $13,737,000 for the years ended December 31, 2006, 2005 and 2004, respectively.

In January 2007, Alagasco issued $45 million of long-term debt with an interest rate of 5.9 percent due January 15, 2037. Alagasco used these long-term debt proceeds to redeem the $34.4 million of 6.75 percent Notes, maturing September 1, 2031 and $10 million of 7.97 percent Medium-Term Notes maturing September 23, 2026.

4. INCOME TAXES

The components of Energen’s income taxes consisted of the following:

Years ended December 31, (in thousands)	2006		2005		2004
Taxes estimated to be payable currently:
Federal	$	47,799	$	29,765	$	7,261
State		9,022		6,078		1,149
Total current		56,821		35,843		8,410
Taxes deferred:
Federal		93,605		59,685		58,956
State		4,604		1,963		8,159
Total deferred		98,209		61,648		67,115
Total income tax expense from continuing operations	$	155,030	$	97,491	$	75,525

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For the years ended December 31, 2006 and 2004, Energen recorded a current income tax expense of $29,000 and $96,000, respectively, related to income from discontinued operations. For the year ended December 31, 2005, Energen recorded a current income tax expense of $3,117,000 and a deferred tax benefit of $3,040,000 related to income from discontinued operations.

The components of Alagasco’s income taxes consisted of the following:

Years ended December 31, (in thousands)	2006		2005		2004
Taxes estimated to be payable currently:
Federal	$	17,472	$	18,430	$	8,581
State		2,273		2,126		1,109
Total current		19,745		20,556		9,690
Taxes deferred:
Federal		1,999		1,597		8,834
State		258		207		1,179
Total deferred		2,257		1,804		10,013
Total income tax expense	$	22,002	$	22,360	$	19,703

Temporary differences and carryforwards which gave rise to Energen’s and Alagasco’s deferred tax assets and liabilities were as follows:

Energen Corporation

(in thousands)	December 31, 2006						December 31, 2005
	Current			Noncurrent			Current			Noncurrent
Deferred tax assets:
Minimum tax credit	$	—		$	1,267		$	—		$	34,786
Pension and other costs		—			10,767			—			8,693
Unbilled and deferred revenue		10,269			—			10,263			—
Enhanced stability reserve and other regulatory costs		2,009			—			1,393			—
Allowance for doubtful accounts		5,216			—			4,304			—
Insurance accruals		2,693			—			3,552			—
Compensation accruals		8,460			—			6,704			—
Inventories		889			—			865			—
Other comprehensive income		—			17,017			51,920			11,916
Gas supply adjustment accruals		1,309			—			991			—
Other, net		2,705			3,300			1,674			2,626
Total deferred tax assets		33,550			32,351			81,666			58,021
Valuation allowance		(1,928	)		(770	)		(1,596	)		(452	)
Total deferred tax assets		31,622			31,581			80,070			57,569
Deferred tax liabilities:
Depreciation and basis differences		—			261,960			—			196,916
Pension and other costs		9,760			—			7,164			—
Minimum pension liability		—			10,767			—			8,693
Other comprehensive income		35,523			—			—			—
Other, net		1,693			—			793			—
Total deferred tax liabilities		46,976			272,727			7,957			205,609
Net deferred tax assets (liabilities)	$	(15,354	)	$	(241,146	)	$	72,113		$	(148,040	)

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Alabama Gas Corporation

(in thousands)	December 31, 2006					December 31, 2005
	Current		Noncurrent			Current		Noncurrent
Deferred tax assets:
Pension and other costs	$	—	$	10,767		$	—	$	8,693
Unbilled and deferred revenue		10,269		—			10,263		—
Enhanced stability reserve and other regulatory costs		2,009		—			1,393		—
Allowance for doubtful accounts		4,991		—			4,083		—
Insurance accruals		2,092		—			2,305		—
Compensation accruals		3,639		—			3,303		—
Inventories		889		—			865		—
Gas supply adjustment accruals		1,309		—			991		—
Other, net		830		487			821		534
Total deferred tax assets		26,028		11,254			24,024		9,227
Deferred tax liabilities:
Depreciation and basis differences		—		42,682			—		40,483
Pension and other costs		11,971		—			10,042		—
Minimum pension liability		—		10,767			—		8,693
Other, net		806		—			698		—
Total deferred tax liabilities		12,777		53,449			10,740		49,176
Net deferred tax assets (liabilities)	$	13,251	$	(42,195	)	$	13,284	$	(39,949	)

The Company files a consolidated federal income tax return with all of its subsidiaries. As of December 31, 2006, the amount of minimum tax credit that has been previously recognized and can be carried forward indefinitely to reduce future regular tax liability is $1.3 million. The Company has a full valuation allowance recorded against a deferred tax asset of $2,698,000 arising from certain state net operating loss and charitable contribution carryforwards. The Company intends to fully reserve this asset until it is determined that it is more likely than not that the asset can be realized through future taxable income in the respective state taxing jurisdictions. No other valuation allowance with respect to deferred taxes is deemed necessary as the Company anticipates generating adequate future taxable income to realize the benefits of all remaining deferred tax assets on the consolidated balance sheets.

Total income tax expense for the Company differed from the amount which would have been provided by applying the statutory federal income tax rate of 35 percent to earnings before taxes from continuing operations as illustrated below:

Years ended December 31, (in thousands)	2006			2005			2004
Income tax expense from continuing operations at statutory federal income tax rate	$	149,994		$	94,632		$	70,991
Increase (decrease) resulting from:
Enhanced oil recovery tax credits		(380	)		(503	)		(456	)
Deferred investment tax credits		—			—			(308	)
State income taxes, net of federal income tax benefit		8,906			5,197			6,004
Qualified Section 199 production activities deduction		(1,114	)		(1,060	)		—
401(k) stock dividend deduction		(682	)		(667	)		(705	)
Other, net		(1,694	)		(108	)		(1	)
Total income tax expense from continuing operations	$	155,030		$	97,491		$	75,525
Effective income tax rate (%)		36.18			36.06			37.24

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Total income tax expense for Alagasco differed from the amount which would have been provided by applying the statutory federal income tax rate of 35 percent to earnings before taxes from continuing operations as illustrated below:

Years ended December 31, (in thousands)	2006			2005			2004
Income tax expense at statutory federal income tax rate	$	20,755		$	20,763		$	18,723
Increase (decrease) resulting from:
Deferred investment tax credits		—			—			(308	)
State income taxes, net of federal income tax benefit		1,666			1,673			1,504
Other, net		(419	)		(76	)		(216	)
Total income tax expense	$	22,002		$	22,360		$	19,703
Effective income tax rate (%)		37.10			37.69			36.83

5. EMPLOYEE BENEFIT PLANS

In December 2006, the Company adopted SFAS No. 158, “Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, an amendment of FASB Statements No. 87, 88, 106 and 132 (R)” (SFAS No. 158). This Standard retains the previous periodic expense calculation on an actuarial basis under the provisions of SFAS No. 87, “Employers’ Accounting for Pensions” and SFAS No. 106, “Employers’ Accounting for Postretirement Benefits Other Than Pensions.” In addition, SFAS No. 158 requires an employer to recognize the net funded status of defined benefit pensions and other postretirement benefit plans (benefit plans) as an asset or liability in its statement of financial position and to recognize changes in the funded status through comprehensive income. Additional minimum pension liabilities (AML) and related intangible assets are derecognized upon adoption of the new Standard. For pension plans, the benefit obligation is the projected benefit obligation; for other postretirement plans, the benefit obligation is the accumulated postretirement benefit obligation. Alagasco established a regulatory asset for the portion of the obligation to be recovered in rates in future periods and a liability for the portion of the plan obligation to be provided through rates in the future in accordance with SFAS No. 71. SFAS No. 158 also requires an employer to measure the funded status of a plan as of the date of its year-end statement of financial position effective for fiscal years ending after December 15, 2008. The Company currently uses a September 30 valuation date for its benefit plans.

The following table summarizes the effect of required changes to the Company’s financial statements as of December 31, 2006 prior and subsequent to the adoption of SFAS No. 158.

(in thousands)	Prior to SFAS No. 158 Adoption		AML Adjustment			SFAS No. 158 Adjustment			Subsequent to SFAS No. 158 Adoption
Prepaid pension costs	$	49,500	$	—		$	(43,914	)	$	5,586
Postretirement assets	$	—	$	—		$	14,389		$	14,389
Regulatory asset	$	22,807	$	(22,807	)	$	28,476		$	28,476
Other assets	$	3,337	$	(558	)	$	(2,781	)	$	—
Accumulated other comprehensive income, net of tax	$	13,707	$	(5,686	)	$	15,156		$	23,177
Pension liabilities	$	47,234	$	(32,113	)	$	21,016		$	36,137
Regulatory liability	$	—	$	—		$	7,220		$	7,220

Pension Plans:

The Company has two defined benefit non-contributory qualified pension plans. These plans cover substantially all employees. Pension benefits for the majority of the Company’s employees are based on years of service and final earnings; one plan is based on years of service and flat dollar amounts. The Company’s policy is to use the projected unit credit actuarial method for funding and financial reporting purposes. The Company also has certain nonqualified supplemental pension plans.

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The following table sets forth the combined funded status of the pension plans and their reconciliation with the related amounts in the Company’s consolidated financial statements. The effect of changes prior to implementation of SFAS No. 158 as well as the impact upon initial adoption of SFAS No. 158 are reflected below:

(in thousands)	2006			2005
Accumulated benefit obligation (September 30)	$	164,207		$	171,264
Projected benefit obligation:
Balance at beginning of period	$	200,977		$	185,691
Service cost		6,452			6,340
Interest cost		10,715			10,458
Plan amendments		154			168
Actuarial (gain) loss		(4,525	)		14,154
Benefits paid		(15,136	)		(15,834	)
Balance at end of period (September 30)	$	198,637		$	200,977
Plan assets:
Fair value of plan assets at beginning of period	$	140,211		$	116,912
Actual return on plan assets		12,937			16,714
Employer contributions		22,924			22,419
Benefits paid		(15,136	)		(15,834	)
Fair value of plan assets at end of period (September 30)	$	160,936		$	140,211
Before reflecting SFAS 158:
Amounts recognized in the consolidated balance sheets:
Funded status of plan	$	(37,701	)	$	(60,766	)
Unrecognized actuarial loss		67,125			78,182
Unrecognized prior service cost		4,330			4,901
Unrecognized transition obligation		—			4
Employer contributions (October 1 to December 31)		7,150			12,217
Accrued pension asset (December 31)	$	40,904		$	34,538
Prepaid benefit cost		42,500			7,257
Accrued benefit liability		(23,868	)		(32,169	)
Intangible asset		2,781			3,339
Accumulated other comprehensive income		12,340			43,893
Net amount recognized (September 30)	$	33,753		$	22,320
After reflecting SFAS 158:
Funded status of plan	$	(37,701	)		—
Employer contributions (October 1 to December 31)		7,150			—
Net pension liability (December 31)	$	(30,551	)		—
Noncurrent assets	$	5,586			—
Current liabilities		(3,633	)		—
Noncurrent liabilities		(32,504	)		—
Net liability recognized (December 31)	$	(30,551	)		—
Amounts recognized to accumulated other comprehensive income:
Prior service costs, net of tax of $1,011	$	1,877			—
Net actuarial loss, net of tax of $12,899		23,957			—
Total accumulated other comprehensive income (December 31)	$	25,834			—

Alagasco established a regulatory asset of $28.5 million and $22.8 million as of December 31, 2006 and 2005, respectively, for the portion of the obligation to be recovered through rates in future periods in accordance with

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SFAS No. 71. Additionally, Alagasco also recognized a reduction to a regulatory liability of $3.2 million as of December 31, 2006 for the portion of the plan obligation to be provided through rates in future periods in accordance with SFAS No. 71.

Related to the Company’s nonqualified supplemental retirement plans, the Company has designated assets of $26.9 million and $24.6 million as of December 31, 2006 and 2005, respectively. While intended for payment of this benefit, these assets remain subject to the claims of the Company’s creditors and are not included in the fair value of plan assets in the above table. Accordingly, these assets are not recognized in the funded status of the plan.

Estimated amounts to be amortized from accumulated other comprehensive income into pension cost during 2007 are as follows:

(in thousands)
Amortization of prior service cost	$	320
Amortization of net actuarial loss	$	3,313

Weighted average rate assumptions used to determine the projected benefit obligations at the measurement date:

	September 30, 2006		September 30, 2005
Discount rate	5.77	%	5.50	%
Rate of compensation increase for pay-related plans	4.22	%	3.58	%

The components of net pension expense were:

Years ended December 31, (in thousands)	2006			2005			2004
Components of net periodic benefit cost:
Service cost	$	6,452		$	6,400		$	5,199
Interest cost		10,715			10,458			9,414
Expected long-term return on assets		(11,990	)		(10,954	)		(9,890	)
Transition amortization		4			5			5
Prior service cost amortization		726			916			589
Actuarial loss		5,257			4,348			3,196
Settlement loss		326			—			—
Net periodic expense	$	11,490		$	11,173		$	8,513

Net retirement expense for Alagasco was $6,158,000, $6,288,000 and $5,175,000 for the years ended December 31, 2006, 2005 and 2004, respectively.

Weighted average rate assumptions to determine net periodic benefit costs for the period ending:

	December 31, 2006		December 31, 2005		December 31, 2004
Discount rate	5.50	%	5.75	%	6.00	%
Expected long-term return on plan assets	8.50	%	8.50	%	8.75	%
Rate of compensation increase for pay-related plans	3.60	%	4.00	%	4.00	%

The Company’s weighted-average defined benefit pension plan asset allocations by asset category were as follows:

	Target		December 31, 2006		December 31, 2005
Asset category:
Equity securities	61	%	53	%	61	%
Debt securities	31	%	31	%	28	%
Other	8	%	16	%	11	%
Total	100	%	100	%	100	%

Plan equity securities do not include the Company’s common stock. The Company is not required to make pension contributions in 2007 and does not currently plan on making discretionary contributions.

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Defined benefit pension plan payments, which reflect expected future service, are anticipated to be paid as follows:

(in thousands)
2007	$	13,263
2008	$	12,052
2009	$	12,995
2010	$	14,156
2011	$	14,300
2012-2016	$	95,862

Postretirement Health Care and Life Insurance Benefits:

In addition to providing pension benefits, the Company provides certain postretirement health care and life insurance benefits. Substantially all of the Company’s employees may become eligible for certain benefits if they reach normal retirement age while working for the Company. The projected unit credit actuarial method was used to determine the normal cost and actuarial liability.

The status of the postretirement benefit programs was as follows:

(in thousands)	2006			2005
Projected postretirement benefit obligation:
Balance at beginning of period	$	70,229		$	71,988
Service cost		1,217			1,423
Interest cost		3,682			4,030
Plan amendment		—			(444	)
Actuarial gain		(7,758	)		(2,333	)
Benefits paid		(3,552	)		(4,435	)
Balance at end of period (September 30)	$	63,818		$	70,229
Plan assets:
Fair value of plan assets at beginning of period	$	73,552		$	65,484
Actual return on plan assets		6,387			8,294
Employer contributions		1,552			4,209
Benefits paid		(3,552	)		(4,435	)
Fair value of plan assets at end of period (September 30)	$	77,939		$	73,552
Before reflecting SFAS 158:
Amounts recognized in the consolidated balance sheets:
Funded status of plan	$	14,121		$	3,323
Unrecognized actuarial gain		(27,949	)		(19,626	)
Unrecognized net transition obligation		13,409			15,326
Employer contributions (October 1 to December 31)		268			626
Accrued benefit asset (liability) (December 31)	$	(151	)	$	(351	)
After reflecting SFAS 158:
Funded status of plan	$	14,121			—
Employer contributions (October 1 to December 31)		268			—
Net pension asset (December 31)	$	14,389			—
Noncurrent assets	$	14,389			—
Current liabilities		—			—
Noncurrent liabilities		—			—
Net asset recognized (December 31)	$	14,389			—
Amounts recognized to accumulated other comprehensive income:
Transition obligation, net of taxes of $640	$	1,188			—
Net actuarial gain, net of taxes of ($2,070)		(3,845	)		—
Total accumulated other comprehensive income (December 31)	$	(2,657	)		—

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Alagasco established a regulatory liability of $10.5 million as of December 31, 2006. This amount will reduce recovery rates in future periods in accordance with SFAS No. 71.

Estimated amounts to be amortized from accumulated other comprehensive income into benefit cost during 2007 are as follows:

(in thousands)
Amortization of transition obligation	$	246
Amortization of net actuarial gain	$	(281	)

Weighted average rate assumptions used to determine postretirement benefit obligations at the measurement date:

	September 30, 2006		September 30, 2005
Discount rate	5.95	%	5.50	%
Rate of compensation increase for pay-related plans	3.70	%	3.50	%

Net periodic postretirement benefit expense included the following:

Years ended December 31, (in thousands)	2006			2005			2004
Components of net periodic benefit cost:
Service cost	$	1,217		$	1,423		$	1,837
Interest cost		3,682			4,030			4,216
Expected long-term return on assets		(4,858	)		(4,335	)		(4,253	)
Actuarial gain		(884	)		(274	)		(414	)
Prior service costs		—			4			4
Transition amortization		1,917			1,967			1,967
Net periodic expense	$	1,074		$	2,815		$	3,357

Net periodic postretirement benefit expense for Alagasco was $971,000, $2,273,000 and $2,573,000 for the years ended December 31, 2006, 2005 and 2004, respectively.

Weighted average rate assumptions to determine net periodic benefit costs for the years ending:

	December 31, 2006		December 31, 2005		December 31, 2004
Discount rate	5.50	%	5.75	%	5.94	%
Expected long-term return on plan assets	8.50	%	8.50	%	8.75	%
Rate of compensation increase	3.50	%	4.00	%	4.00	%

Assumed post-65 health care cost trend rates used to determine the postretirement benefit obligation at the measurement date:

	September 30, 2006		September 30, 2005
Health care cost trend rate assumed for next year	10.00	%	10.00	%
Rate to which the cost trend rate is assumed to decline	5.00	%	5.00	%
Year that rate reaches ultimate rate	2011		2010

Assumed health care cost trend rates used in determining the accumulated postretirement benefit obligation have an effect on the amounts reported. For example, increasing the weighted average health care cost trend rate by 1 percentage point would have the following effects:

(in thousands)	1-Percentage Point Increase
Effect on total of service and interest cost	$	423
Effect on net postretirement benefit obligation	$	3,621

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The Company’s weighted-average postretirement benefit program asset allocations by asset category were as follows:

	Target		December 31, 2006		December 31, 2005
Asset category:
Equity securities	70	%	71	%	71	%
Debt securities	20	%	20	%	20	%
Other	10	%	9	%	9	%
Total	100	%	100	%	100	%

Equity securities for the postretirement benefit programs do not include the Company’s common stock. The Company expects to make discretionary contributions of $371,000 to postretirement benefit program assets during 2007.

The following postretirement benefit payments, which reflect expected future service, are anticipated to be paid:

(in thousands)
2007	$	4,073
2008	$	4,219
2009	$	4,364
2010	$	4,522
2011	$	4,670
2012-2016	$	24,701

The following benefits reflect the expected prescription drug subsidy related to the Medicare Prescription Drug, Improvement and Modernization Act of 2003 (Act). The Act includes a prescription drug benefit under Medicare Part D as well as a federal subsidy beginning in 2007:

(in thousands)
2007	$	(367	)
2008	$	(390	)
2009	$	(410	)
2010	$	(421	)
2011	$	(427	)
2012-2016	$	(2,120	)

For retirement plans and other postretirement plans, certain financial assumptions are used in determining the Company’s projected benefit obligation. These assumptions are examined periodically by the Company, and any required changes are reflected in the subsequent determination of projected benefit obligations.

The Company employs a total return investment approach whereby a mix of equities and fixed income investments are used to maximize the long-term return of plan assets with a prudent level of risk. Risk tolerance is established through consideration of plan liabilities, plan funded status, corporate financial condition, and market conditions.

The Company has developed an investment strategy that focuses on asset allocation, diversification and quality guidelines. The investment goals of the Company are to obtain an adequate level of return to meet future obligations of the plan by providing above average risk-adjusted returns with a risk exposure in the mid-range of comparable funds. Investment managers are retained by the Company to manage separate pools of assets. Funds are allocated to such managers in order to achieve an appropriate, diversified, and balanced asset mix. Comparative market and peer group benchmarks are utilized to ensure that investment managers are performing satisfactorily.

The Company based its expected return on long-term investment expectations. The Company considered past performance and current expectations for assets held by the plan as well as the expected long-term allocation of plan assets. At December 31, 2006, the expected return on plan assets was 8.25%.

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The Company has a long-term disability plan covering most employees. The Company had expense for the years ended December 31, 2006, 2005 and 2004 of $304,000, $483,000 and $938,000, respectively.

6. COMMON STOCK PLANS*

Energen Employee Savings Plan (ESP):A majority of Company employees are eligible to participate in the ESP by electing to contribute a portion of their compensation to the ESP. The Company may match a percentage of the contributions and make these contributions in Company common stock (new issue or treasury shares) or in funds for the purchase of Company common stock. Prior to January 1, 2004, employees were allowed to invest their elective contributions in Company stock. Company stock is no longer an investment option for new elective contributions. Vested employees may diversify 100 percent of their ESP Company stock account into other ESP investment options regardless of whether the Company stock was acquired through elective contribution, Company match, Company contribution or reinvestment of earnings. The ESP also contains employee stock ownership plan provisions. At December 31, 2006, total shares reserved for issuance equaled 1,080,108. Expense associated with Company contributions to the ESP was $4,891,000, $4,650,000 and $4,210,000 for the years ended December 31, 2006, 2005 and 2004, respectively.

1997 Stock Incentive Plan and 1988 Stock Option Plan:The 1997 Stock Incentive Plan and the Energen 1988 Stock Option Plan provided for the grant of incentive stock options and, non-qualified stock options to officers and key employees. The 1997 Stock Incentive Plan also provided for the grant of performance share awards and restricted stock. Under the 1997 Stock Incentive Plan, 5,600,000 shares of Company common stock were reserved for issuance with 1,986,405 remaining for issuance as of December 31, 2006. Under the 1988 Stock Option Plan, 1,080,000 shares of Company common stock reserved for issuance have been granted.

Performance Share Awards: The Energen 1997 Stock Incentive Plan provided for the grant of performance share awards, with each unit equal to the market value of one share of common stock, to eligible employees based on predetermined Company performance criteria at the end of a four-year award period. On January 25, 2006, the Company amended its 1997 Stock Incentive Plan to provide that payment of earned performance share awards be made in the form of Company common stock, with no portion of an award paid in cash. This amendment affected 29 participants. Prior to the amendment, payment of performance awards could be made in cash or in a combination of Company common stock or cash. The impact of this modification was not significant to the Company.

1997 Stock Incentive Plan performance share awards granted or modified after the adoption of SFAS No. 123R have been valued in a Monte Carlo model. The Monte Carlo model uses historical volatility and other variables to estimate the probability of satisfying the market condition of the award. For performance share awards granted prior to the adoption of SFAS No. 123R, the Company estimated fair value based on the quoted market price of the Company’s common stock and adjusted each period for the expected payout ratio.

A summary of performance share award activity as of December 31, 2006, and transactions during the years ended December 31, 2006, 2005 and 2004 are presented below:

	1997 Stock Incentive Plan
	Shares		Weighted Average Price
Nonvested at December 31, 2003	599,640		$	22.89
Granted	136,300			21.38
Paid	(145,860	)		25.99
Forfeitures	(15,260	)		14.37
Nonvested at December 31, 2004	574,820		$	38.18
Granted	117,540			29.16
Paid	(214,640	)		51.80
Nonvested at December 31, 2005	477,720		$	40.26
Granted	111,990			43.81
Forfeitures	(847	)		43.81
Nonvested at December 31, 2006	588,863		$	40.81

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The Company recorded expense of $8,779,000, $9,338,000 and $8,708,000 for the years ended December 31, 2006, 2005 and 2004, respectively, for performance share awards with a related deferred income tax benefit of $3,319,000, $3,531,000 and $3,292,000, respectively. As of December 31, 2006, there was $5.3 million of total unrecognized compensation cost related to performance share awards. These awards have a weighted average requisite service period of 1.72 years from the date of grant.

Stock Options: The 1997 Stock Incentive Plan and the Energen 1988 Stock Option Plan provided for the grant of incentive stock options, non-qualified stock options, or a combination thereof to officers and key employees. Options granted under the Plans provide for the purchase of Company common stock at not less than the fair market value on the date the option is granted. The sale or transfer of the shares is limited during certain periods. All outstanding options are incentive or non-qualified, vest within three years from date of grant, and expire 10 years from the grant date.

A summary of stock option activity as of December 31, 2006, and transactions during the years ended December 31, 2006, 2005 and 2004 are presented below:

	1997 Stock Incentive Plan				1988 Stock Option Plan
	Shares		Weighted Average Exercise Price		Shares		Weighted Average Exercise Price
Outstanding at December 31, 2003	970,840		$	11.97	206,000		$	7.20
Granted	82,760			21.38	—��			—
Exercised	(349,960	)		10.83	(148,000	)		7.12
Forfeited	(8,400	)		12.26	—			—
Outstanding at December 31, 2004	695,240			13.72	58,000			7.39
Exercised	(80,140	)		11.26	(30,000	)		5.77
Forfeited	(1,700	)		14.86	—			—
Outstanding at December 31, 2005	613,400			14.04	28,000			9.13
Exercised	(206,322	)		13.18	(7,000	)		9.13
Outstanding at December 31, 2006	407,078		$	14.69	21,000		$	9.13
Exercisable at December 31, 2004	497,100		$	10.62	58,000		$	7.39
Exercisable at December 31, 2005	415,260		$	10.48	28,000		$	9.13
Exercisable at December 31, 2006	324,318		$	12.98	21,000		$	9.13
Remaining reserved for issuance at December 31, 2006	1,986,405			—	—			—

The Company granted no stock options during 2006 and 2005. The Company granted 82,760 shares during 2004 which had a weighted average grant-date fair value of $7.11. The Company recorded expense of $196,000, $465,000 and $465,000 during the years ended December 31, 2006, 2005 and 2004, respectively, for these shares with a related deferred tax benefit of $41,000, $107,000 and $107,000 respectively.

The total intrinsic value of stock options exercised during the year ended December 31, 2006, was $5,573,000. During the year ended December 31, 2006, the total intrinsic value of stock appreciation rights exercised was $1,034,000. During the year ended December 31, 2006, the Company received cash of $1,565,000 from the exercise of stock options and paid $608,000 in settlement of stock appreciation rights. Total intrinsic value for outstanding options as of December 31, 2006, was $13.9 million and $11.8 million for exercisable options. The fair value of options vested for the year ended December 31, 2006 was $3.3 million. As of December 31, 2006, there was no unrecognized compensation cost related to outstanding nonvested stock options.

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The following table summarizes options outstanding as of December 31, 2006:

1997 Stock Incentive Plan			1988 Stock Option Plan
Range of Exercise Prices	Shares	Weighted Average Remaining Contractual Life	Range of Exercise Prices	Shares	Weighted Average Remaining Contractual Life
$9.13-$9.41	50,502	2.27 years	$9.13	21,000	0.92 years
$13.72	87,600	3.83 years	—	—	—
$11.32	64,206	4.83 years	—	—	—
$14.86	122,010	6.08 years	—	—	—
$21.38	82,760	7.08 years	—	—	—
$9.13-$21.38	407,078	5.13 years	$9.13	21,000	0.92 years

The weighted average remaining contractual life of currently exercisable stock options is 4.41 years as of December 31, 2006.

Restricted Stock: In addition, the 1997 Stock Incentive Plan provided for the grant of restricted stock which have been valued based on the quoted market price of the Company’s common stock at the date of grant. A summary of restricted stock activity as of December 31, 2006, and transactions during the years ended December 31, 2006, 2005 and 2004 is presented below:

	1997 Stock Incentive Plan
	Shares			Weighted Average Price
Nonvested at December 31, 2003	141,274			$	13.80
Granted	131,520				21.90
Vested	(47,606	)			11.81
Forfeited	(4,160	)			17.02
Nonvested at December 31, 2004	221,028				18.99
Granted	44,040				29.16
Vested	(21,424	)			22.46
Forfeited	(1,200	)			29.16
			��
Nonvested at December 31, 2005	242,444				20.48
Granted	44,750				40.10
Vested	(59,764	)			14.99
Forfeited	(1,600	)			29.16
Nonvested at December 31, 2006	225,830			$	25.76

The Company recorded expense of $2,252,000, $1,800,000 and $1,390,000 for the years ended December 31, 2006, 2005 and 2004, respectively, related to restricted stock, with a related deferred income tax benefit of $851,000, $681,000 and $526,000, respectively. As of December 31, 2006, there was $1.7 million of total unrecognized compensation cost related to nonvested restricted stock awards recorded in premium on capital stock. These awards have a requisite service period of 1.5 years from the date of grant. The Company has typically funded options, restricted stock obligations and performance share obligations through original issue shares.

2004 Stock Appreciation Rights Plan:The Energen 2004 Stock Appreciation Rights Plan provided for the payment of cash incentives measured by the long-term appreciation of Company stock. These awards are liability awards which settle in cash and are re-measured each reporting period until settlement. These awards have a three year requisite service period. Awards granted prior to January 1, 2006 were valued using the intrinsic value method. There were no awards granted with stock appreciation rights in 2006 or 2005. During 2004, 25,000 awards were granted with stock appreciation rights. Expense associated with stock appreciation rights of $1,218,000, $1,326,000 and $916,000 was recorded for the years ended December 31, 2006, 2005 and 2004, respectively.

2005 Petrotech Incentive Plan:The Energen Resources’ 2005 Petrotech Incentive Plan provided for the grant of restricted stock units which may include market conditions. These awards are liability awards which settle in cash and are re-measured each reporting period until settlement. Effective January 1, 2006, the fair value of the restricted stock units with a market condition was calculated using a Monte Carlo approach. Restricted stock units with service conditions were valued based on the Company’s stock price at the end of the period adjusted to remove the present value of future dividends. Prior to the implementation of SFAS 123R, these awards were valued using the Company’s common stock price at each period end.

65

During 2006, Energen Resources awarded 25,720 restricted stock units of which 22,545 included a market condition. Energen Resources awarded 46,920 restricted stock units in 2005 of which 23,460 included a market condition. Energen Resources recognized expense of $791,000 during 2006 related to these units. There was no expense recognized during 2005 or 2004 related to these units.

1997 Deferred Compensation Plan:The 1997 Deferred Compensation Plan allowed officers and non-employee directors to defer certain compensation. Amounts deferred by a participant under the 1997 Deferred Compensation Plan are credited to accounts maintained for a participant in either a stock account or an investment account. The stock account tracks the performance of the Company’s common stock, including reinvestment of dividends. The investment account tracks the performance of certain mutual funds. The Company has funded, and presently plans to continue funding, a trust in a manner that generally tracks participants’ accounts under the 1997 Deferred Compensation Plan. While intended for payment of benefits under the 1997 Deferred Compensation Plan, the trust’s assets remain subject to the claims of the Company’s creditors. Amounts earned under the Deferred Compensation Plan and invested in Company common stock held by the trust have been recorded as treasury stock, along with the related deferred compensation obligation in the Consolidated Statements of Shareholders’ Equity.

Shareholder Rights Plan: On June 24, 1998, the Company adopted a Shareholder Rights Plan (the 1998 Plan) designed to protect shareholders from coercive or unfair takeover tactics. Under certain circumstances, the 1998 Plan provides shareholders with the right to acquire the Company’s Series 1998 Junior Participating Preferred Stock (or, in certain cases, securities of an acquiring person) at a significant discount. Terms and conditions are set forth in a Rights Agreement between the Company and its Rights Agent. Under the 1998 Plan, one half of a right is associated with each outstanding share of common stock. Rights outstanding under the 1998 Plan at December 31, 2006, were convertible into 736,922 shares of Series 1998 Junior Participating Preferred Stock (1/100 share of preferred stock for each full right) subject to adjustment upon occurrence of certain take-over related events. No rights were exercised or exercisable during the period. The price at which the rights would be exercised is $70 per right, subject to adjustment upon occurrence of certain take-over related events. In general, absent certain take-over related events as described in the Plan, the rights may be redeemed prior to the July 27, 2008 expiration for $0.01 per right.

1992 Energen Corporation Directors Stock Plan:In 1992 the Company adopted the Energen Corporation 1992 Directors Stock Plan to pay part of the compensation of its non-employee directors in shares of Company common stock. Under the Plan, 11,517 shares, 12,116 shares and 10,800 shares were awarded during the years ended December 31, 2006, 2005 and 2004, respectively, leaving 225,445 shares reserved for issuance as of December 31, 2006.

Dividend Reinvestment and Direct Stock Purchase Plan: The Company’s Dividend Reinvestment and Direct Stock Purchase Plan included a direct stock purchase feature which allowed purchases by non-shareholders. As of December 31, 2006, 1,098,292 common shares were reserved under this Plan. Effective December 15, 2006, the Company suspended operations under the Plan and shareholders became eligible to reinvest dividends or make direct stock purchases using the Company’s stock transfer and dividend paying agent, The Bank of New York.

By resolution adopted May 25, 1994, and supplemented by a resolution adopted April 26, 2000 and June 24, 2006, the Board authorized the Company to repurchase up to 12,564,400 shares of the Company’s common stock. For the year ended December 31, 2006, the Company repurchased 2,158,000 shares pursuant to its repurchase authorization. There were no shares repurchased pursuant to its repurchase authorization for the years ended December 31, 2005 and 2004. As of December 31, 2006, a total of 8,992,700 shares remain authorized for future repurchase. The Company also from time to time acquires shares in connection with participant elections under the Company’s stock compensation plans. For the years ended December 31, 2006, 2005 and 2004, the Company acquired 82,707 shares, 67,957 shares and 36,044 shares, respectively, in connection with its stock compensation plans.

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

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7. COMMITMENTS AND CONTINGENCIES

Commitments and Agreements: Certain of Alagasco’s long-term gas procurement contracts for the supply, storage and delivery of natural gas include fixed charges of approximately $212 million through October 2015. Alagasco also is committed to purchase minimum quantities of gas at market-related prices or to pay certain costs in the event the minimum quantities are not taken. These purchase commitments are approximately 156.3 Bcf through April 2015.

Environmental Matters:Various environmental laws and regulations apply to the operations of Energen Resources and Alagasco. Historically, the cost of environmental compliance has not materially affected the Company’s financial position, results of operations or cash flows and is not expected to do so in the future; however, new regulations, enforcement policies, claims for damages or other events could result in significant unanticipated costs.

A discussion of certain litigation in the state of Louisiana related to the restoration of oilfield properties is included below under Legal Matters.

Alagasco is in the chain of title of nine former manufactured gas plant sites (four of which it still owns), and five manufactured gas distribution sites (one of which it still owns). An investigation of the sites does not indicate the present need for remediation activities. Management expects that, should remediation of any such sites be required in the future, Alagasco’s share, if any, of such costs will not materially affect the financial position of Alagasco.

Legal Matters:Energen and its affiliates are, from time to time, parties to various pending or threatened legal proceedings. Certain of these lawsuits include claims for punitive damages in addition to other specified relief. Based upon information presently available, and in light of available legal and other defenses, contingent liabilities arising from threatened and pending litigation are not considered material in relation to the respective financial positions of Energen and its affiliates. It should be noted, however, that Energen and its affiliates conduct business in Alabama and other jurisdictions in which the magnitude and frequency of punitive and other damage awards may bear little or no relation to culpability or actual damages, thus making it difficult to predict litigation results.

Jefferson County, Alabama

In January 2006, RGGS Land and Minerals LTD, L.P. (RGGS) filed a lawsuit in Jefferson County, Alabama, alleging breach of contract with respect to Energen Resources’ calculation of certain allowed costs and failure to pay in a timely manner certain amounts due RGGS under a mineral lease. RGGS seeks a declaratory judgment with respect to the parties’ rights under the lease, reformation of the lease, monetary damages and termination of Energen Resources’ rights under the lease. The Occluded Gas Lease dated January 1, 1986 was originally between Energen Resources and United States Steel Corporation (U.S. Steel) as lessor. RGGS became the lessor under the lease as a result of a 2004 conveyance from U.S. Steel to RGGS. Approximately 120,000 acres in Jefferson and Tuscaloosa counties, Alabama, are subject to the lease. Separately on February 6, 2006, Energen Resources received notice of immediate lease termination from RGGS. During 2006, Energen Resources’ production associated with the lease was approximately 10 Bcf.

RGGS has adopted positions contrary to the seventeen years of course of dealing between Energen Resources and its original contracting partner, U.S. Steel. The Company believes that RGGS’ assertions are without merit and that the notice of lease termination is ineffective. Energen Resources intends to vigorously defend its rights under the lease. The Company remains in possession of the lease, believes that the likelihood of a judgment in favor of RGGS is remote, and has made no accrual with respect to the litigation or purported lease termination.

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Enron Corporation

Enron and Enron North America Corporation (ENA) have settled with Energen Resources and Alagasco related to the Enron and ENA bankruptcy proceedings. Under the settlement, Energen Resources was allowed claims in the bankruptcy cases against Enron and ENA of $12.5 million each. In December 2006, Energen Resources sold its claims against Enron and ENA for a gain of $6.7 million after-tax. All other claims have been released.

Legacy Litigation

During recent years, numerous lawsuits have been filed against oil production companies in Louisiana for restoration of oilfield properties. These suits are referred to in the industry as “legacy litigation” because they usually involve operations that were conducted on the affected properties many years earlier. Energen Resources is or has been a party to several legacy litigation lawsuits, most of which result from the operations of predecessor companies. Based upon information presently available, and in light of available legal and other defenses, contingent liabilities arising from legacy litigation in excess of the Company’s accrued provision for estimated liability are not considered material to the Company’s financial position.

Other

Various other pending or threatened legal proceedings are in progress currently, and the Company has accrued a provision for estimated liability.

Lease Obligations: Alagasco leases the Company’s headquarters building over a 25-year term and the related lease is accounted for as an operating lease. Under the terms of the lease, Alagasco has a renewal option; the lease does not contain a bargain purchase price or a residual value guarantee. Energen’s total lease payments related to leases included as operating lease expense were $15,845,000, $13,628,000 and $10,638,000 for the years ended December 31, 2006, 2005 and 2004, respectively. Minimum future rental payments required after 2006 under leases with initial or remaining noncancelable lease terms in excess of one year are as follows:

Years Ending December 31,(in thousands)
2007		2008		2009		2010		2011		2012 and thereafter
$	3,772	$	3,330	$	3,252	$	3,113	$	3,121	$	29,589

Alagasco’s total payments related to leases included as operating expense were $3,310,000, $3,148,000 and $2,728,000 for the years ended December 31, 2006, 2005 and 2004, respectively. Minimum future rental payments required after 2006 under leases with initial or remaining noncancelable lease terms in excess of one year are as follows:

Years Ending December 31,(in thousands)
2007		2008		2009		2010		2011		2012 and thereafter
$	3,171	$	3,102	$	3,102	$	3,113	$	3,121	$	29,589

8. FINANCIAL INSTRUMENTS AND RISK MANAGEMENT

Financial Instruments: The stated value of cash and cash equivalents, trade receivables (net of allowance), and short-term debt approximates fair value due to the short maturity of the instruments. The fair value of Energen’s long-term debt, including the current portion, with a carrying value of $683,756,000 would be $704,719,000 at December 31, 2006. The fair value of Alagasco’s fixed-rate long-term debt, including the current portion, with a carrying value of $208,756,000 would be $203,622,000 at December 31, 2006. The fair values were based on current market prices.

Alagasco purchases gas as an agent for certain of its large commercial and industrial customers. Alagasco has in certain instances provided commodity-related guarantees to counterparties in order to facilitate these agency purchases. Liabilities existing for gas delivered to customers subject to these guarantees are included in the consolidated balance sheet. In the event the customer for whom the guarantee was entered fails to take delivery of the gas, Alagasco can sell such gas for the customer, with the customer liable for any resulting loss. Although the substantial majority of purchases under these guarantees are for the customers’ current monthly consumption and are at current market prices, in some instances, the purchases are for an extended term at a fixed price. At December 31, 2006, the fixed price purchased under these guarantees had a maximum term outstanding through December 2007 with an aggregate purchase price of $11.3 million and a market value of $9.5 million.

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Alagasco had an agreement with a financial institution whereby it could sell on an ongoing basis, with recourse, certain installment receivables related to its merchandising program. Effective February 1, 2004, Alagasco no longer sells its installment receivables. At December 31, 2006 and 2005, the balances of these installment receivables were $510,000 and $1,589,000, respectively. Receivables sold under this agreement were considered financial instruments with off-balance sheet risk. Alagasco’s exposure to credit loss in the event of non-performance by customers is represented by the balance of installment receivables. The fair value of these guarantees is recorded as a non-current other liability.

Price Risk: The Company applies SFAS No. 133 as amended which requires all derivatives to be recognized on the balance sheet and measured at fair value. If a derivative is designated as a cash flow hedge, the effectiveness of the hedge, or the degree that the gain (loss) for the hedging instrument offsets the loss (gain) on the hedged item is measured at each reporting period. The effective portion of the gain or loss on the derivative instrument is recognized in other comprehensive income as a component of equity and subsequently reclassified into earnings in operating revenues when the forecasted transaction affects earnings. The ineffective portion of a derivative’s change in fair value is required to be recognized in operating revenues immediately. Derivatives that do not qualify for hedge treatment under SFAS No. 133 must be recorded at fair value with gains or losses recognized in operating revenues in the period of change.

Energen Resources periodically enters into cash flow derivative commodity instruments to hedge its price exposure on its estimated oil, natural gas and natural gas liquids production. In addition, Alagasco periodically enters into cash flow derivative commodity instruments to hedge its exposure to price fluctuations on its gas supply. Such instruments may include regulated natural gas and crude oil futures contracts traded on the New York Mercantile Exchange and over-the-counter swaps, collars and basis hedges with major energy derivative product specialists. The counterparties to the commodity instruments are investment banks and energy-trading firms. In some contracts, the amount of credit allowed before Energen Resources or Alagasco collateral must be posted for out-of-the-money hedges varies depending on the credit rating of the Company or Alagasco. In cases where these arrangements exist, the credit ratings must be maintained at investment grade status to have any available counterparty credit. Adverse changes to the Company’s or Alagasco’s credit rating results in decreasing amounts of credit available under these contracts. The counterparties for these contracts do not extend credit to the Company or Alagasco in the event credit ratings are below investment grade. At December 31, 2006, Energen Resources was in a net gain position with all but two of its counterparties and was not required to post collateral. Energen Resources used various counterparties for its over-the-counter derivatives as of December 31, 2006. The Company believes the creditworthiness of these counterparties is satisfactory. The three largest counterparties represented approximately 38 percent, 29 percent and 27 percent of Energen Resources’ gain on fair value of derivatives.

As of December 31, 2006, $58 million of deferred net gains on derivative instruments recorded in accumulated other comprehensive income, net of tax, are expected to be reclassified and reported in earnings as operating revenues during the next twelve-month period. The actual amount that will be reclassified to earnings over the next year could vary materially from this amount due to changes in market conditions. Gains and losses on derivative instruments that are not accounted for as cash flow hedge transactions, as well as the ineffective portion of the change in fair value of derivatives accounted for as cash flow hedges, are included in operating revenues in the consolidated financial statements. The Company recorded a $0.8 million after-tax loss in 2006 for the ineffective portion of the change in fair value of derivatives accounted for as cash flow hedges. Also, the Company recorded an after-tax gain of $0.5 million in 2006 on contracts which did not meet the definition of cash flow hedges under SFAS No. 133. As of December 31, 2006, all of the Company’s hedges met the definition of a cash flow hedge. During 2006, the Company discontinued hedge accounting and reclassified gains of $0.5 million after-tax from OCI into operating revenues when Energen Resources determined it was probable certain forecasted volumes would not occur.

The Company had $31 million and $56.5 million included in current and noncurrent deferred income taxes on the consolidated balance sheets related to items included in other comprehensive income as of December 31, 2006 and 2005, respectively. The Company had $93.3 million of current gains recorded in accounts receivable at December 31, 2006. At December 31, 2006 and 2005, the Company also had $0.7 million and $145.9 million, respectively, of current losses recorded in accounts payable and $11.9 million at both December 31, 2006 and 2005, of non-current losses recorded in deferred credits and other liabilities related to derivative contracts.

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As of December 31, 2006, Energen Resources entered into the following transactions for 2007 and subsequent years:

Production Period	Total Hedged Volumes	Average Contract Price		Description
Natural Gas
2007	13.2 Bcf	$	9.27 Mcf	NYMEX Swaps
	29.4 Bcf	$	7.88 Mcf	Basin Specific Swaps
Oil
2007	2,716 MBbl	$	70.01 Bbl	NYMEX Swaps
2008	1,920 MBbl	$	66.89 Bbl	NYMEX Swaps
2009	900 MBbl	$	56.25 Bbl	NYMEX Swaps
Oil Basis Differential
2007	2,368 MBbl		**	Basis Swaps
2008	1,020 MBbl		**	Basis Swaps
Natural Gas Liquids
2007	44.9 MMGal	$	0.93 Gal	Liquids Swaps

** Average contract prices not meaningful due to the varying nature of each contract

All hedge transactions are subject to the Company’s risk management policy, approved by the Board of Directors, which does not permit speculative positions. The Company formally documents all relationships between hedging instruments and hedged items at the inception of the hedge, as well as its risk management objective and strategy for undertaking the hedge. This process includes specific identification of the hedging instrument and the hedge transaction, the nature of the risk being hedged and how the hedging instrument’s effectiveness in hedging the exposure to the hedged transaction’s variability in cash flows attributable to the hedged risk will be assessed and measured. Both at the inception of the hedge and on an ongoing basis, the Company assesses whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flows of hedged items. The Company discontinues hedge accounting if a derivative has ceased to be a highly effective hedge. The maximum term over which Energen Resources has hedged exposures to the variability of cash flows is through December 31, 2009.

At December 31, 2006, Alagasco recorded an $11.5 million loss as a liability in accounts payable with a corresponding current regulatory asset of $11.5 million representing the fair value of derivatives. At December 31, 2005, Alagasco recognized a $6.3 million loss as a liability in accounts payable with a corresponding current regulatory asset of $6.3 million representing the fair value of derivatives. Additionally, Alagasco recorded a current regulatory liability and a corresponding receivable of $1.2 million related to certain interest rate treasury futures. These futures were entered into by the Company to reduce the interest rate risk associated with a $45 million debt issuance completed by Alagasco in January 2007.

Concentration of Credit Risk:Revenues and related accounts receivable from oil and gas operations primarily are generated from the sale of produced natural gas and oil to natural gas and oil marketing companies. Such sales are typically made on an unsecured credit basis with payment due the month following delivery. This concentration of sales to the energy marketing industry has the potential to affect the Company’s overall exposure to credit risk, either positively or negatively, in that the Company’s oil and gas purchasers may be affected similarly by changes in economic, industry or other conditions. Energen Resources considers the credit quality for its customers and, in certain instances, may require credit assurances such as a deposit, letter of credit or parent guarantee. The four largest oil and gas purchasers accounted for approximately 25 percent, 14 percent, 12 percent and 10 percent of Energen Resources’ accounts receivable for commodity sales as of December 31, 2006. Energen Resources’ other purchasers each accounted for less than 8 percent of this accounts receivable as December 31, 2006. During the year ended December 31, 2006, one purchaser accounted for approximately 12 percent of the Company’s total operating revenues.

Natural gas distribution operating revenues and related accounts receivable are generated from state-regulated

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utility natural gas sales and transportation to approximately 455,000 residential, commercial and industrial customers located in central and north Alabama. A change in economic conditions may affect the ability of customers to meet their obligations; however, the Company believes that its provision for possible losses on uncollectible accounts receivable is adequate for its credit loss exposure.

9. RECONCILIATION OF EARNINGS PER SHARE*

	2006					2005					2004
Years ended December 31, (in thousands, except per share amounts)	Net Income		Shares	Per Share Amount		Net Income		Shares	Per Share Amount		Net Income		Shares	Per Share Amount
Basic EPS	$	273,570	72,505	$	3.77	$	173,012	73,052	$	2.37	$	127,463	72,547	$	1.76
Effect of dilutive securities
Long-range performance shares			408					208					212
Stock options			252					334					330
Restricted stock			113					121					28
Diluted EPS	$	273,570	73,278	$	3.73	$	173,012	73,715	$	2.35	$	127,463	73,117	$	1.74

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

For the years ended December 31, 2006, 2005 and 2004, the Company had no options or shares of non-vested restricted stock that were excluded from the computation of diluted EPS.

10. ASSET RETIREMENT OBLIGATIONS

The Company applies SFAS No. 143, “Accounting for Asset Retirement Obligations,” which requires the Company to record the fair value of a liability for an asset retirement obligation (ARO) in the period in which it is incurred. Subsequent to initial measurement, liabilities are required to be accreted to their present value each period and capitalized costs are depreciated over the estimated useful life of the related assets. Upon settlement of the liability, the Company will settle the obligation for its recorded amount and will record the resulting gain or loss.

In 2006, 2005 and 2004, Energen Resources recognized amounts representing expected future costs associated with site reclamation, facilities dismantlement, and plug and abandonment of wells as follows:

(in thousands)
Balance of ARO as of December 31, 2003	$	26,515
Liabilities incurred during the year ended December 31, 2004		1,172
Liabilities settled during the year ended December 31, 2004		(413	)
Revision in estimated cash flows		5,302
Accretion expense		2,265
Balance of ARO as of December 31, 2004		34,841
Liabilities incurred during the year ended December 31, 2005		10,102
Liabilities settled during the year ended December 31, 2005		(689	)
Revision in estimated cash flows		3,369
Accretion expense		2,647
Balance of ARO as of December 31, 2005		50,270
Liabilities incurred during the year ended December 31, 2006		1,176
Liabilities settled during the year ended December 31, 2006		(1,085	)
Accretion expense		3,619
Balance of ARO as of December 31, 2006	$	53,980

As of December 31, 2005, the Company adopted FIN 47, “Accounting for Conditional Asset Retirement Obligations,” which clarifies that if a legal obligation to perform an asset retirement activity exists but performance is conditional upon a future event, the liability is required to be recognized in accordance with SFAS 143 if the obligation can be reasonably measured. Alagasco recorded a conditional asset retirement obligations of $12.8 million and $13.5 million to purge and cap its gas pipelines upon abandonment as a regulatory liability under SFAS No. 71 as of December 31, 2006 and 2005, respectively. The costs associated with asset retirement obligations under FIN 47 are currently either being recovered in rates or are probable of recovery in future rates. Accordingly, the adoption of FIN 47 did not have an impact on the Company’s income statements.

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Alagasco accrues removal costs on certain gas distribution assets over the useful lives of its property, plant and equipment through depreciation expense in accordance with rates approved by the APSC. In accordance with SFAS No. 71, the accumulated asset removal costs of $114.5 million and $105.4 million for December 31, 2006 and 2005, respectively, are included as regulatory liabilities in deferred credits and other liabilities on the consolidated balance sheets.

11. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental information concerning Energen’s cash flow activities was as follows:

Years ended December 31, (in thousands)	2006		2005		2004
Interest paid, net of amount capitalized	$	48,879	$	43,849	$	40,557
Income taxes paid	$	60,308	$	32,879	$	8,352
Noncash investing activities:
Capitalized depreciation	$	99	$	96	$	94
Allowance for funds used during construction	$	951	$	792	$	1,247

Under SFAS No. 143, the Company recorded a non-cash adjustment for accretion expense of $3.6 million, $2.6 million and $2.3 million during 2006, 2005 and 2004, respectively. In December 2006, the Company adopted SFAS No. 158, “Employers’ Accounting for Defined Benefit Pension and Other Postretirement Plans, an amendment of FASB Statements No. 87, 88, 106 and 132 (R)”. In adopting the standard, the Company recognized noncash adjustments to its financial statements as disclosed in Note 5, Employee Benefit Plans.

Supplemental information concerning Alagasco’s cash flow activities was as follows:

Years ended December 31, (in thousands)	2006		2005		2004
Interest paid, net of amount capitalized	$	14,683	$	12,664	$	11,248
Income taxes paid	$	21,027	$	22,456	$	11,034
Noncash investing activities:
Capitalized depreciation	$	99	$	96	$	94
Allowance for funds used during construction	$	951	$	792	$	1,247

12. LONG-LIVED ASSETS AND DISCONTINUED OPERATIONS

The Company applies SFAS No. 144, “Accounting for the Impairment or Disposal of Long-Lived Assets,” which retains the previous asset impairment requirements of SFAS No. 121, “Accounting for the Impairment of Long-Lived Assets and for Long-Lived Assets to be Disposed Of,” for loss recognition when the carrying value of an asset exceeds the sum of the undiscounted estimated future cash flows of the asset. In addition, SFAS No. 144 requires that gains and losses in the sale of certain oil and gas properties and impairments on certain properties held-for-sale be reported as discontinued operations, with income or loss from operations of the associated properties reported as income or loss from discontinued operations. The results of operations for held-for-sale properties are reclassified and reported as discontinued operations for prior periods in accordance with SFAS No. 144. Energen Resources may, in the ordinary course of business, be involved in the sale of developed or undeveloped properties. All assets held-for-sale must be reported at the lower of the carrying amount or fair value. Energen Resources had no proved property sales during 2006 or 2004. During 2005, Energen Resources recorded a pre-tax gain of $213,000 primarily from a proved property sale located in the Permian Basin.

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The following are the results of operations from discontinued operations:

Years ended December 31, (in thousands, except per share data)	2006			2005			2004
Oil and gas revenues	$	—		$	82		$	531
Pretax income (loss) from discontinued operations	$	(10	)	$	(10	)	$	262
Income tax expense (benefit)		(4	)		(4	)		99
Income (Loss) from Discontinued Operations		(6	)		(6	)		163
Gain (loss) on disposal of discontinued operations		86			213			(8	)
Income tax expense (benefit)		33			81			(3	)
Gain (Loss) on Disposal of Discontinued Operations		53			132			(5	)
Total Income from Discontinued Operations	$	47		$	126		$	158
Diluted Earnings Per Average Common Share*
Income (Loss) from Discontinued Operations	$	—		$	—		$	—
Gain (Loss) on Disposal of Discontinued Operations		—			—			—
Total Income (Loss) from Discontinued Operations	$	—		$	—		$	—
Basic Earnings Per Average Common Share*
Income from Discontinued Operations	$	—		$	—		$	0.01
Gain (Loss) on Disposal of Discontinued Operations		—			—			—
Total Income from Discontinued Operations	$	—		$	—		$	0.01

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

13. SUMMARIZED QUARTERLY FINANCIAL DATA (Unaudited)

The Company’s business is seasonal in character. The following data summarizes quarterly operating results. The summarized quarterly information may differ from amounts previously reported due to changes in the classification of properties reported as discontinued operations as required by SFAS No. 144 (see Note 12).

	Year Ended December 31, 2006
(in thousands, except per share amounts)	First		Second		Third		Fourth**
Operating revenues	$	488,142	$	282,374	$	242,711	$	380,759
Operating income	$	151,735	$	89,298	$	75,669	$	160,598
Income from continuing operations	$	87,501	$	49,602	$	41,297	$	95,123
Net income	$	87,494	$	49,601	$	41,352	$	95,123
Diluted earnings per average common share
Continuing operations	$	1.18	$	0.67	$	0.56	$	1.31
Net income	$	1.18	$	0.67	$	0.56	$	1.31
Basic earnings per average common share
Continuing operations	$	1.19	$	0.68	$	0.57	$	1.33
Net income	$	1.19	$	0.68	$	0.57	$	1.33

	Year Ended December 31, 2005
(in thousands, except per share amounts)	First		Second		Third		Fourth
Operating revenues	$	361,008	$	241,624	$	190,681	$	335,081
Operating income	$	105,130	$	70,747	$	41,071	$	98,776
Income from continuing operations	$	58,942	$	37,572	$	19,073	$	57,299
Net income	$	59,046	$	37,573	$	19,086	$	57,307
Diluted earnings per average common share*
Continuing operations	$	0.80	$	0.51	$	0.26	$	0.77
Net income	$	0.80	$	0.51	$	0.26	$	0.78
Basic earnings per average common share*
Continuing operations	$	0.81	$	0.51	$	0.26	$	0.78
Net income	$	0.81	$	0.51	$	0.26	$	0.78

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

** Includes an after-tax gain of $34.5 million on the sale of a 50 percent interest in Energen Resources’ lease position in various unproved shale plays in Alabama.

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Alagasco’s business is seasonal in character and influenced by weather conditions. The following data summarizes Alagasco’s quarterly operating results.

	Year Ended December 31, 2006
(in thousands)	First		Second			Third			Fourth
Operating revenues	$	318,623	$	113,196		$	71,195		$	160,430
Operating income (loss)	$	63,727	$	2,711		$	(8,921	)	$	16,757
Net income (loss)	$	37,369	$	(531	)	$	(7,673	)	$	8,133

	Year Ended December 31, 2005
(in thousands)	First		Second		Third			Fourth
Operating revenues	$	258,128	$	107,197	$	64,421		$	170,954
Operating income (loss)	$	66,404	$	5,630	$	(11,025	)	$	11,913
Net income (loss)	$	39,004	$	1,073	$	(8,810	)	$	5,697

14. ACQUISITION AND DISPOSTION OF OIL AND GAS PROPERTIES

In October 2006, Energen Resources sold a 50 percent interest in its lease position in various shale plays in Alabama to Chesapeake Energy Corporation (Chesapeake) for cash and a carried drilling interest. In addition, the two companies have signed an agreement to form an area of mutual interest (AMI) to focus on the further exploration and development of these shale plays throughout Alabama and a part of Georgia. Energen Resources received $75 million in cash from Chesapeake for a 50 percent interest in Energen Resources’ existing shale lease position of approximately 200,000 net acres in Alabama. Chesapeake also will pay for Energen Resources’ first $15 million of future drilling costs. Energen Resources had a gain of approximately $34.5 million after-tax in the fourth quarter of 2006 resulting from this sale of its lease position.

In December 2006, Energen Resources completed a purchase which expanded its operations in the San Juan Basin from Dominion Resources Inc. effective December 1, 2006 for approximately $30 million. Energen used its available cash and existing lines of credit to finance the acquisition.

On December 15, 2005, Energen Resources completed a purchase of Permian Basin oil properties from a private company. The contract purchase price was approximately $168 million with an effective date of November 1, 2005. Energen used its available cash and existing lines of credit to finance the acquisition.

On August 2, 2004, Energen Resources completed a purchase of San Juan Basin coalbed methane properties from a private company for approximately $273 million. The effective date of the acquisition was August 1, 2004. Energen used its short-term credit facilities and internally generated cash flows to finance the acquisition. A portion of the short-term debt incurred to finance the acquisition was repaid when Energen issued $100 million of Floating Rate Senior Notes in November 2004.

Summarized below are the consolidated results of operations for the year ended December 31, 2004, on an unaudited pro forma basis as if the August 2004 purchase of assets in the San Juan Basin had occurred at the beginning of 2004. The pro forma information is based on the Company’s consolidated results of operations for the ear ended December 31, 2004, and on the data provided by the seller. The pro forma financial information does not purport to be indicative of results of operations that would have occurred had the transaction occurred on the basis assumed above, nor are they indicative of results of the future operations of the combined enterprises.

Year ended December 31, (Unaudited) (in thousands, except per share data)	2004
Operating revenues	$	949,203
Income from continuing operations	$	128,109
Net income	$	128,267
Diluted earnings per average common share*	$	1.75
Basic earnings per average common share*	$	1.77

* Share and per share data have been restated to reflect a 2-for-1 stock split effective June 1, 2005.

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15. REGULATORY ASSETS AND LIABILITIES

The following table details regulatory assets and liabilities on the consolidated balance sheets:

	December 31, 2006				December 31, 2005
Energen Corporation (in thousands)	Current		Noncurrent		Current		Noncurrent
Regulatory assets:
Pension asset	$	—	$	28,476	$	—	$	22,807
Accretion and depreciation for asset retirement obligation		—		9,803		—		10,183
Gas supply adjustment		23,595		—		—		—
Risk management activities		11,543		—		6,291		—
Other		341		106		342		446
Total regulatory assets	$	35,479	$	38,385	$	6,633	$	33,436
Regulatory liabilities:
Enhanced stability reserve	$	3,951	$	—	$	3,690	$	—
Gas supply adjustment		—		—		22,326		—
RSE adjustment		1,460		—		2,943		—
Unbilled service margin		27,233		—		24,537		—
Asset removal costs, net		—		114,520		—		105,404
Asset retirement obligation		—		12,833		—		13,451
Pension liability and postretirement benefits		—		7,220		—		—
Other		1,227		893		—		953
Total regulatory liabilities	$	33,871	$	135,466	$	53,496	$	119,808

As described in Note 2, Alagasco’s rates are established under the RSE rate-setting process and are based on average equity for the period. Alagasco’s rates are not adjusted to exclude a return on its investment in regulatory assets during the recovery period.

16. STOCK DIVIDEND

On April 27, 2005, Energen’s shareholders approved a 2-for-1 split of the Company’s common stock. The split was effected in the form of a 100 percent stock dividend and was payable on June 1, 2005, to shareholders of record on May 13, 2005. All share and per share amounts of capital stock outstanding have been adjusted to reflect the stock split. Effective April 29, 2005, the Restated Certificate of Incorporation of Energen Corporation was amended to increase the Company’s authorized common stock, par value $0.01 per share, from 75,000,000 shares to 150,000,000 shares.

17. TRANSACTIONS WITH RELATED PARTIES

Alagasco purchased natural gas of $2,731,000 and $2,112,000 from affiliates for the years ended December 31, 2005 and 2004, respectively. These amounts were included in gas purchased for resale. All transactions were at market based pricing. Alagasco did not purchase natural gas from affiliated companies in 2006.

The Company allocates certain corporate costs to Energen Resources and Alagasco based on the nature of the expense to be allocated using various factors including, but not limited to, total assets, earnings, or number of employees. The Company’s cash management program matches short-term cash surpluses with the needs of its

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affiliates, to minimize borrowing from outside sources. Alagasco had net payables to affiliates of $18,130,000 at December 31, 2006, and net receivables from affiliates of $3,215,000 at December 31, 2005. Interest income and expense between affiliates is calculated monthly based on the market weighted average interest rate. The weighted average interest rate during 2006 and 2005 was 5.43 percent and 3.63 percent, respectively.

18. RECENT PRONOUNCEMENTS OF THE FINANCIAL ACCOUNTING STANDARDS BOARD (FASB)

In June 2006, the FASB issued FASB Interpretation No. 48, “Accounting for Uncertainty in Income Taxes-an Interpretation of FASB Statement No. 109” (FIN 48) to address accounting for uncertainty in tax positions. This Interpretation prescribed a recognition threshold and measurement attribute for the financial statement recognition, measurement and disclosure of a tax position taken or expected to be taken in a tax return. FIN 48 is effective for fiscal years beginning after December 15, 2006. The Company has analyzed FIN 48 and does not expect the adoption of this Interpretation will have a material impact to the Company. The cumulative effect of applying this Interpretation will be recorded as a decrease to retained earnings as of January 1, 2007, in an amount not expected to exceed $1 million.

During September 2006, the FASB issued SFAS No. 157, “Fair Value Measurements,” which clarifies the principle that fair value should be based on the assumptions market participants would use when pricing an asset or a liability and establishes a fair value hierarchy that prioritizes the information used to develop those assumptions. Under SFAS No. 157, fair value measurements would be separately disclosed by level within the fair value hierarchy effective for fiscal years beginning after November 15, 2007. The Company is currently evaluating the impact of this Statement.

19. OIL AND GAS OPERATIONS(Unaudited)

The following schedules detail historical financial data of the Company’s oil and gas operations. Certain reclassifications have been made to conform the prior years’ financial statements to the current-year presentation.

Capitalized Costs

(in thousands)	December 31, 2006		December 31, 2005
Proved	$	2,141,874	$	1,911,588
Unproved		21,191		18,703
Total capitalized costs		2,163,065		1,930,291
Accumulated depreciation, depletion, and amortization		559,059		466,643
Capitalized costs, net	$	1,604,006	$	1,463,648

Costs Incurred:The following table sets forth costs incurred in property acquisition, exploration and development activities and includes both capitalized costs and costs charged to expense during the year:

Years ended December31, (in thousands)	2006		2005		2004
Property acquisition:
Proved	$	24,388	$	170,338	$	273,735
Unproved		22,040		18,065		665
Exploration		26,767		5,490		5,060
Development		187,734		158,025		125,211
Total costs incurred	$	260,929	$	351,918	$	404,671

Results of Continuing Operations From Producing Activities:The following table sets forth results of the Company’s oil and gas continuing operations from producing activities:

Years ended December 31, (in thousands)	2006		2005		2004
Gross revenues	$	675,830	$	529,415	$	412,441
Production (lifting costs)		184,362		156,512		116,476
Exploration expense		4,181		676		2,100
Depreciation, depletion and amortization		95,522		87,398		79,119
Accretion expense		3,619		2,647		2,265
Income tax expense		140,619		102,102		80,293
Results of continuing operation from producing activities	$	247,527	$	180,080	$	132,188

76

Oil and Gas Operations: The calculation of proved reserves is made pursuant to rules prescribed by the SEC. Such rules, in part, require that only proved categories of reserves be disclosed and that reserves and associated values be calculated using year-end prices and current costs. Changes to prices and costs could have a significant effect on the disclosed amount of reserves and their associated values. In addition, the estimation of reserves inherently requires the use of geologic and engineering estimates which are subject to revision as reservoirs are produced and developed and as additional information is available. Accordingly, the amount of actual future production may vary significantly from the amount of reserves disclosed. The proved reserves are located onshore in the United States of America.

Estimates of physical quantities of oil and gas proved reserves were determined by Company engineers. Ryder Scott Company, L.P. and T. Scott Hickman and Associates, Inc., independent oil and gas reservoir engineers, have reviewed the estimates of proved reserves of natural gas, oil and natural gas liquids that the Company has attributed to its net interests in oil and gas properties as of December 31, 2006. Ryder Scott Company, L.P. reviewed the reserve estimates for coalbed methane in the Black Warrior and San Juan basins and substantially all of the Permian Basin reserves. T. Scott Hickman and Associates, Inc. reviewed the reserves for the North Louisiana and East Texas regions and the conventional reserves in the San Juan Basin. The independent reservoir engineers have issued reports covering approximately 98 percent of the Company’s ending proved reserves indicating that in their judgment the estimates are reasonable in the aggregate.

Year ended December 31, 2006	Gas MMcf		Oil MBbl		NGL MBbl
Proved reserves at beginning of period	1,080,161		74,962		31,934
Revisions of previous estimates	(40,458	)	(3,518	)	(1,449	)
Purchases	19,561		81		24
Discoveries and other additions	99,988		7,013		812
Production	(62,823	)	(3,645	)	(1,817	)
Sales	—		—		—
Proved reserves at end of period	1,096,429		74,893		29,504
Proved developed reserves at end of period	866,874		55,210		26,932

Year ended December 31, 2005	Gas MMcf		Oil MBbl		NGL MBbl
Proved reserves at beginning of period	1,019,436		54,500		34,613
Revisions of previous estimates	43,221		186		(1,484	)
Purchases	3,974		21,614		58
Discoveries and other additions	75,742		1,979		429
Production	(61,117	)	(3,316	)	(1,681	)
Sales	(1,095	)	(1	)	(1	)
Proved reserves at end of period	1,080,161		74,962		31,934
Proved developed reserves at end of period	891,978		54,901		27,681

Year ended December 31, 2004	Gas MMcf		Oil MBbl		NGL MBbl
Proved reserves at beginning of period	886,307		52,528		27,245
Revisions of previous estimates	(42,052	)	594		(5	)
Purchases	194,607		24		8,422
Discoveries and other additions	37,832		4,788		575
Production	(57,258	)	(3,434	)	(1,624	)
Proved reserves at end of period	1,019,436		54,500		34,613
Proved developed reserves at end of period	810,083		47,792		28,079

77

Energen Resources had no proved property sales during 2006 or 2004. During 2005, Energen Resources sold approximately 1.1 Bcfe of proved reserves, recording a net pre-tax gain of $1.7 million on certain properties in the Permian and Black Warrior basins.

Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves: The standardized measure of discounted future net cash flows is not intended, nor should it be interpreted, to present the fair market value of the Company’s crude oil and natural gas reserves. An estimate of fair market value would take into consideration factors such as, but not limited to, the recovery of reserves not presently classified as proved reserves, anticipated future changes in prices and costs, and a discount factor more representative of the time value of money and the risks inherent in reserve estimates. At December 31, 2006, 2005 and 2004, the Company had a deferred hedging gain of $81.5 million, and deferred hedging losses of $148.6 million and $41.1 million, respectively, all of which are excluded from the calculation of standardized measure of future net cash flows.

Years ended December 31, (in thousands)	2006		2005		2004
Future gross revenues	$	11,012,667	$	14,252,735	$	8,791,050
Future production costs		3,909,649		4,168,061		2,797,556
Future development costs		556,131		357,408		222,519
Future income tax expense		2,062,210		3,268,157		1,923,094
Future net cash flows		4,484,677		6,459,109		3,847,881
Discount at 10% per annum		2,338,576		3,547,454		1,956,463
Standardized measure of discounted future net cash flows relating to proved oil and gas reserves	$	2,146,101	$	2,911,655	$	1,891,418
Discounted future net cash flows before income taxes	$	2,827,411	$	4,045,529	$	2,542,760

Reserves and associated values were calculated using year-end prices and current costs. The following are the principal sources of changes in the standardized measure of discounted future net cash flows:

Years ended December 31, (in thousands)	Year Ended December 31, 2006			Year Ended December 31, 2005			Year Ended December 31, 2004
Balance at beginning of year	$	2,911,655		$	1,891,418		$	1,573,079
Revisions to reserves proved in prior years:
Net changes in prices, production costs and future development costs		(1,489,312	)		1,288,366			147,380
Net changes due to revisions in quantity estimates		(123,057	)		90,952			(58,378	)
Development costs incurred, previously estimated		86,554			101,740			83,404
Accretion of discount		291,166			189,142			157,308
Other		159,945			(69,803	)		9,093
Total revisions		(1,074,704	)		1,600,397			338,807
New field discoveries and extensions, net of future production and development costs		253,277			235,832			133,714
Sales of oil and gas produced, net of production costs		(549,559	)		(595,439	)		(417,846	)
Purchases		39,481			199,319			300,183
Sales		—			(2,474	)		—
Net change in income taxes		565,951			(417,398	)		(36,519	)
Net change in standardized measure of discounted future net cash flows		(765,554	)		1,020,237			318,339
Balance at end of year	$	2,146,101		$	2,911,655		$	1,891,418

78

20. INDUSTRY SEGMENT INFORMATION

The Company is principally engaged in two business segments: the acquisition, development, exploration and production of oil and gas in the continental United States (oil and gas operations) and the purchase, distribution and sale of natural gas in central and north Alabama (natural gas distribution). The accounting policies of the segments are the same as those described in Note 1. Certain reclassifications have been made to conform the prior years’ financial statements to the current year presentation.

(in thousands)	Year Ended December 31, 2006			Year Ended December 31, 2005			Year Ended December 31, 2004
Operating revenues from continuing operations
Oil and gas operations	$	730,542		$	530,341		$	412,028
Natural gas distribution		663,444			600,700			526,740
Eliminations and other		—			(2,647	)		(1,911	)
Total	$	1,393,986		$	1,128,394		$	936,857
Operating income (loss) from continuing operations
Oil and gas operations	$	405,149		$	243,876		$	180,379
Natural gas distribution		74,274			72,922			66,199
Subtotal		479,423			316,798			246,578
Eliminations and corporate expenses		(2,123	)		(1,074	)		(1,735	)
Total	$	477,300		$	315,724		$	244,843
Depreciation, depletion and amortization expense from continuing operations
Oil and gas operations	$	97,842		$	89,340		$	80,896
Natural gas distribution		44,244			42,351			39,881
Total	$	142,086		$	131,691		$	120,777
Interest expense
Oil and gas operations	$	33,542		$	32,778		$	29,660
Natural gas distribution		16,454			15,060			13,737
Subtotal		49,996			47,838			43,397
Eliminations and other		(1,344	)		(1,038	)		(654	)
Total	$	48,652		$	46,800		$	42,743
Income tax expense (benefit) from continuing operations
Oil and gas operations	$	134,938		$	76,362		$	56,982
Natural gas distribution		22,002			22,360			19,703
Subtotal		156,940			98,722			76,685
Other		(1,910	)		(1,231	)		(1,160	)
Total	$	155,030		$	97,491		$	75,525
Capital expenditures
Oil and gas operations	$	259,678		$	353,712		$	403,936
Natural gas distribution		76,157			73,276			58,208
Total	$	335,835		$	426,988		$	462,144
Identifiable assets
Oil and gas operations	$	1,822,216		$	1,637,244		$	1,315,967
Natural gas distribution		994,125			946,819			837,557
Subtotal		2,816,341			2,584,063			2,153,524
Eliminations and other		20,546			34,163			28,215
Total	$	2,836,887		$	2,618,226		$	2,181,739
Property, plant and equipment, net
Oil and gas operations	$	1,612,764		$	1,470,063		$	1,214,461
Natural gas distribution		639,650			597,948			568,598
Total	$	2,252,414		$	2,068,011		$	1,783,059

79

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

Energen Corporation

Years ended December 31, (in thousands)	2006			2005			2004
ALLOWANCE FOR DOUBTFUL ACCOUNTS
Balance at beginning of year	$	11,573		$	10,472		$	9,852
Additions:
Charged to income		6,972			6,076			4,819
Recoveries and adjustments		(232	)		(431	)		(290	)
Net additions		6,740			5,645			4,529
Less uncollectible accounts written off		(4,352	)		(4,544	)		(3,909	)
Balance at end of year	$	13,961		$	11,573		$	10,472

Alabama Gas Corporation

Years ended December 31, (in thousands)	2006			2005			2004
ALLOWANCE FOR DOUBTFUL ACCOUNTS
Balance at beginning of year	$	10,800		$	9,600		$	9,100
Additions:
Charged to income		6,972			6,076			4,819
Recoveries and adjustments		(227	)		(342	)		(403	)
Net additions		6,745			5,734			4,416
Less uncollectible accounts written off		(4,345	)		(4,534	)		(3,916	)
Balance at end of year	$	13,200		$	10,800		$	9,600

80

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None

ITEM 9A. CONTROLS AND PROCEDURES

a. Conclusion Regarding Disclosure Controls and Procedures

Our chief executive officer and chief financial officer have evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation they have concluded that our disclosure controls and procedures are effective as of December 31, 2006, at a reasonable assurance level.

b. Management’s Report On Internal Control Over Financial Reporting

Management of Energen Corporation is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934. Energen Corporation’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America. Internal control over financial reporting includes those written policies and procedures that:

i pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of Energen Corporation;

ii provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with accounting principles generally accepted in the United States of America, and that receipts and expenditures of Energen Corporation are being made only in accordance with authorization of management and directors of Energen Corporation; and

iii provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of assets that could have a material effect on the consolidated financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Management assessed the effectiveness of Energen Corporation’s internal control over financial reporting as of December 31, 2006. Management based this assessment on criteria for effective internal control over financial reporting described in “Internal Control -Integrated Framework”issued by the Committee of Sponsoring Organizations of the Treadway Commission. Management’s assessment included an evaluation of the design of Energen Corporation’s internal control over financial reporting and testing of the operational effectiveness of its internal control over financial reporting. Management reviewed the results of its assessment with the Audit Committee of our Board of Directors.

Based on this assessment, management determined that, as of December 31, 2006, Energen Corporation maintained effective internal control over financial reporting. Management’s assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2006 has been audited by PricewaterhouseCoopers LLP, our independent registered public accounting firm, as stated in their report which appears herein.

February 27, 2007

81

c. Changes in Internal Control Over Financial Reporting

Our chief executive officer and chief financial officer have concluded that during the most recent fiscal quarter covered by this report there were no changes in our internal control over financial reporting that materially affected or are reasonably likely to materially affect our internal control over financial reporting.

82

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Information regarding the executive officers of Energen is included in Part I. The other information required by Item 10 is incorporated herein by reference from Energen’s definitive proxy statement for the Annual Meeting of Shareholders to be held April 25, 2007. The definitive proxy statement will be filed on or about March 26, 2007.

ITEM 11. EXECUTIVE COMPENSATION

The information regarding executive compensation is incorporated herein by reference from Energen’s definitive proxy statement for the Annual Meeting of Shareholders to be held April 25, 2007.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

a. Security Ownership of Certain Beneficial Owners

The information regarding the security ownership of the beneficial owners of more than five percent of Energen’s common stock is incorporated herein by reference from Energen’s definitive proxy statement for the Annual Meeting of Shareholders to be held April 25, 2007.

b. Security Ownership of Management

The information regarding the security ownership of management is incorporated herein by reference from Energen’s definitive proxy statement for the Annual Meeting of Shareholders to be held April 25, 2007.

c. Securities Authorized for Issuance Under Equity Compensation Plans

The information regarding securities authorized for issuance under equity compensation plans is included in Part 2 under Item 5.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information regarding certain relationships and related transactions, and director independence is incorporated herein by reference from Energen’s definitive proxy statement for the Annual Meeting of Shareholders to be held April 25, 2007.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information regarding Principal Accountant Fees and Services is incorporated herein by reference from Energen’s definitive proxy statement for the Annual Meeting of Shareholders to be held April 25, 2007.

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PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

a. Documents Filed as Part of This Report

(1) Financial Statements

The consolidated financial statements of Energen and the financial statements of Alagasco are included in Item 8 of this Form 10-K

(2) Financial Statement Schedules

The financial statement schedules are included in Item 8 of this Form 10-K

(3) Exhibits

The exhibits listed on the accompanying Index to Exhibits are filed as part of this Form 10-K

84

Energen Corporation

Alabama Gas Corporation

INDEX TO EXHIBITS

Item 14(a)(3)

Exhibit Number	Description
*3(a)	Restated Certificate of Incorporation of Energen Corporation (composite, as amended April 29, 2005) which was filed as Exhibit 3(a) to Energen’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2005
*3(b)	Articles of Amendment to Restated Certificate of Incorporation of Energen, designating Series 1998 Junior Participating Preferred Stock (July 27, 1998) which was filed as Exhibit 4(b) to Energen’s Post Effective Amendment No. 1 to Registration Statement on Form S-3 (Registration No. 333-00395)
*3(c)	Bylaws of Energen Corporation (as amended through October 30, 2002) which was filed as Exhibit 4(c) to Energen’s Registration Statement on Form S-8 (Registration No. 33-46641)
*3(d)	Articles of Amendment and Restatement of the Articles of Incorporation of Alabama Gas Corporation, dated September 27, 1995, which was filed as Exhibit 3(i) to the Registrant’s Annual Report on Form 10-K for the year ended September 30, 1995
*3(e)	Bylaws of Alabama Gas Corporation (as amended through October 30, 2002) which was filed as Exhibit 3(e) to Energen’s Annual Report on Form 10-K for the year ended December 31, 2003
*4(a)	Rights Agreement, dated as of July 27, 1998, between Energen Corporation and First Chicago Trust Company of New York, Rights Agent, which was filed as Exhibit 1 to Energen’s Registration Statement on Form 8-A, dated July 10, 1998
*4(b)	Form of Indenture between Energen Corporation and The Bank of New York, as Trustee, which was dated as of September 1, 1996 (the “Energen 1996 Indenture”), and which was filed as Exhibit 4(i) to the Registrant’s Registration Statement on Form S-3 (Registration No. 333-11239)
*4(b)(i)	Officers’ Certificate, dated September 13, 1996, pursuant to Section 301 of the Energen 1996 Indenture setting forth the terms of the Series A Notes which was filed as Exhibit 4(d)(i) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2001
*4(b)(ii)	Officers’ Certificate, dated July 8, 1997, pursuant to Section 301 of the Energen 1996 Indenture amending the terms of the Series A Notes which was filed as Exhibit 4(d)(ii) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2001
*4(b)(iii)	Amended and Restated Officers’ Certificate, dated February 27, 1998, setting forth the terms of the Series B Notes which was filed as Exhibit 4(d)(iii) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2001
*4(b)(iv)	Officers’ Certificate, dated October 3, 2003, pursuant to Section 301 of the Energen 1996 Indenture setting forth the terms of the 5 percent Notes due October 1, 2013, which was filed as Exhibit 4 to Energen’s Current Report on Form 8-K, dated October 3, 2003
*4(b)(v)	Officers’ Certificate, dated November 19, 2004, pursuant to Section 301 of the Energen 1996 Indenture setting forth the terms of the Floating Rate Senior Notes due November 15, 2004, which was filed as Exhibit 4.2 to Energen’s Current Report on Form 8-K, dated November 19, 2004

85

*4(c)	Indenture dated as of November 1, 1993, between Alabama Gas Corporation and NationsBank of Georgia, National Association, Trustee, (“Alagasco 1993 Indenture”), which was filed as Exhibit 4(k) to Alabama Gas’ Registration Statement on Form S-3 (Registration No. 33-70466)
*4(c)(i)	Officers’ Certificate, dated August 30, 2001, pursuant to Section 301 of the Alagasco 1993 Indenture setting forth the terms of the 6.75 percent Notes due September 1, 2031, which was filed as Exhibit 4.02 to Alabama Gas’ Current Report on Form 8-K filed September 27, 2001
*4(c)(ii)	Officers’ Certificate, dated January 14, 2005, pursuant to Section 301 of the Alagasco 1993 Indenture setting forth the terms of the 5.70 percent Notes due January 15, 2035, which was filed as Exhibit 4.3 to Alabama Gas’ Current Report on Form 8-K filed January 14, 2005
*4(c)(iii)	Officers’ Certificate, dated January 14, 2005, pursuant to Section 301 of the Alagasco 1993 Indenture setting forth the terms of the 5.20 percent Notes due January 15, 2020, which was filed as Exhibit 4.4 to Alabama Gas’ Current Report on Form 8-K filed January 14, 2005
*4(c)(iv)	Officers’ Certificate, dated November 17, 2005, pursuant to Section 301 of the Alagasco 1993 Indenture setting forth the terms of the 5.368 percent Notes due December 1, 2015, which was filed as Exhibit 4.2 to Alabama Gas’ Current Report on Form 8-K filed November 17, 2005
*4(c)(v)	Officers’ Certificate, dated January 16, 2007, pursuant to Section 301 of the Alagasco 1993 Indenture setting forth the terms of the 5.90 percent Notes due January 15, 2037, which was filed as Exhibit 4.2 to Alabama Gas’ Current Report on Form 8-K filed January 16, 2007
*10(a)	Service Agreement Under Rate Schedule CSS (No. SSNG1), between Southern Natural Gas Company and Alabama Gas Corporation, dated as of September 1, 2005
*10(b)	Firm Transportation Service Agreement Under Rate Schedule FT and/or FT-NN (No. FSNG1), between Southern Natural Gas Company and Alabama Gas Corporation dated as of September 1, 2005
*10(c)	Form of Service Agreement Under Rate Schedule IT (No. 790420), between Southern Natural Gas Company and Alabama Gas Corporation which was filed as Exhibit 10(b) to Energen’s Annual Report on Form 10-K for the year ended September 30, 1993
*10(d)	Service Agreement between Transcontinental Gas Pipeline Corporation and Transco Energy Marketing Company as Agent for Alabama Gas Corporation, dated August 1, 1991 which was filed as Exhibit 3(e) to Energen’s Annual Report on Form 10-K for the year ended December 31, 2003
*10(e)	Amendment to Service Agreement between Transcontinental Gas Pipeline Corporation and Alabama Gas Corporation, dated December 2, 2005
*10(f)	Occluded Gas Lease, dated January 1, 1986 and First through Seventh Amendments
*10(g)	Form of Executive Retirement Supplement Agreement between Energen Corporation and it’s executive officers (as revised October 2000) which was filed as Exhibit 10(c) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2000
*10(h)	Amendment to Executive Retirement Supplement Agreement with Mr. Warren, dated December 13, 2006, which was filed as Exhibit 99.2 to Energen’s Current Report on Form 8-K, filed December 14, 2006

86

*10(i)	Amendment to Executive Retirement Supplement Agreement with Mr. Ketcham, dated December 13, 2006, which was filed as Exhibit 99.3 to Energen’s Current Report on Form 8-K, filed December 14, 2006
*10(j)	Form of Severance Compensation Agreement between Energen Corporation and it’s executive officers which was filed as Exhibit 99.1 to Energen’s Current Report on Form 8-K, dated January 29, 2007
*10(k)	Energen Corporation 1988 Stock Option Plan (as amended November 25, 1997) which was filed as Exhibit 10(e) to Energen’s Annual Report on Form 10-K for the year ended September 30, 1998
*10(l)	Energen Corporation 1997 Stock Incentive Plan (as amended effective October 25, 2006) which was filed as Exhibit 99.2 to Energen’s Current Report on Form 8-K filed October 30, 2006
*10(m)	Form of Stock Option Agreement under the Energen Corporation 1997 Stock Incentive Plan which was filed as Exhibit 10(a) to Energen’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2004
*10(n)	Form of Restricted Stock Agreement under the Energen Corporation 1997 Stock Incentive Plan which was filed as Exhibit 10(b) to Energen’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2004
*10(o)	Form of Performance Share Award under the Energen Corporation 1997 Stock Incentive Plan which was filed as Exhibit 10(c) to Energen’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2004
*10(p)	Energen Corporation 1997 Deferred Compensation Plan (as amended effective January 1, 2001) which was filed as Exhibit 10(n) to Energen’s Annual Report Form 10K for the year ended December 31, 2005
*10(q)	Amendment No. 1 to the Energen Corporation 1997 Deferred Compensation Plan (as amended January 1, 2001) which was filed as Exhibit 10(o) to Energen’s Annual Report Form 10K for the year ended December 31, 2005.
*10(r)	Energen Corporation 1992 Directors Stock Plan (as amended April 25, 1997) which was filed as Exhibit 10(i) to Energen’s Annual Report on Form 10-K for the year ended September 30, 1998 (File No. 1-7810)
*10(s)	Energen Corporation Annual Incentive Compensation Plan, as amended effective October 25, 2006 which was filed as Exhibit 99.1 to Energen’s Current Report on Form 8-K, filed October 30, 2006
*10(t)	Energen Corporation Officer Split Dollar Life Insurance Plan, effective October 1, 1999 which was filed as Exhibit 10(l) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2000 (File No. 1-7810)
*10(u)	Form of Split Dollar Life Insurance Plan Agreement under Energen Corporation Officer Split Dollar Life Insurance Plan which was filed as Exhibit 10(m) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2000 (File No. 1-7810)
*10(v)	Officer Split Dollar Tax Matters Agreement which was filed as Exhibit 10(n) to Energen’s Annual Report on Form 10-K for the year ended September 30, 2000 (File No. 1-7810)

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*10(w)	Energen Board of Directors resolution adopted as of May 14, 2004, terminating the Energen Corporation Officer Split Dollar Life Insurance Plan which was filed as Exhibit 10(u) to Energen’s Annual Report on Form 10K for the year ended December 31, 2005
21	Subsidiaries of Energen Corporation
23(a)	Consent of Registered Public Accounting Firm (PricewaterhouseCoopers LLP)
23(b)	Consent of Registered Public Accounting Firm (PricewaterhouseCoopers LLP)
23(c)	Consent of Independent Oil and Gas Reservoir Engineers (Ryder Scott Company, L.P.)
23(d)	Consent of Independent Oil and Gas Reservoir Engineers (T. Scott Hickman and Associates, Inc.)
31(a)	Certification of Chief Executive Officer pursuant to Rule 13a-14(a) or 15d-14(a)
31(b)	Certification of Chief Financial Officer pursuant to Rule 13a-14(a) or 15d-14(a)
32	Certification pursuant to Section 1350

* Incorporated by reference

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SIGNATURE

Pursuant to the requirements of Section 13 or 15(d) of the Securities and Exchange Act of 1934, the Registrants have duly caused this report to be signed on their behalf by the undersigned thereunto duly authorized.

ENERGEN CORPORATION

(Registrant)

ALABAMA GAS CORPORATION

(Registrant)

February 27, 2007	By	/s/ Wm. Michael Warren, Jr.
		Wm. Michael Warren, Jr.
		Chairman and Chief Executive Officer of Energen Corporation, Chairman and Chief Executive Officer of Alabama Gas Corporation

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SIGNATURES

Pursuant to the requirements of the Securities and Exchange Act of 1934, this report has been signed by the following persons on behalf of the Registrants and in the capacities and on the dates indicated:

February 27, 2007	By	/s/ Wm. Michael Warren, Jr.
		Wm. Michael Warren, Jr.
		Chairman and Chief Executive Officer of Energen
		Corporation, Chairman and Chief Executive Officer of
		Alabama Gas Corporation
February 27, 2007	By	/s/ Charles W. Porter, Jr.
		Charles W. Porter, Jr.
		Vice President, Chief Financial Officer and
		Treasurer of Energen Corporation and Alabama Gas Corporation
February 27, 2007	By	/s/ Grace B. Carr
		Grace B. Carr
		Vice President and Controller of Energen Corporation
February 27, 2007	By	/s/ Paula H. Rushing
		Paula H. Rushing
		Vice President-Finance of Alabama Gas
		Corporation
February 27, 2007	By	/s/ Julian W. Banton
		Julian W. Banton
		Director
February 27, 2007	By	/s/ James S. M. French
		James S. M. French
		Director
February 27, 2007	By	/s/ T. Michael Goodrich
		T. Michael Goodrich
		Director
February 27, 2007	By	/s/ Judy M. Merritt
		Judy M. Merritt
		Director
February 27, 2007	By	/s/ David W. Wilson
		David W. Wilson
		Director

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