MGE ENERGY INC - Annual Report: 2010 (Form 10-K)

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 fiscal year ended:

December 31, 2010

[ ] Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from _______________ to _______________

Commission File No.	Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No.	IRS Employer Identification No.
000-49965	MGE Energy, Inc. (a Wisconsin Corporation) 133 South Blair Street Madison, Wisconsin 53703 (608) 252-7000 www.mgeenergy.com	39-2040501
000-1125	Madison Gas and Electric Company (a Wisconsin Corporation) 133 South Blair Street Madison, Wisconsin 53703 (608) 252-7000 www.mge.com	39-0444025

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

	Title of Class	Name of Each Exchange on which Registered
MGE Energy, Inc.	Common Stock, $1 Par Value Per Share	The Nasdaq Stock Market

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

	Title of Class
Madison Gas and Electric Company	Cumulative Preferred Stock, $25 Par Value Per Share

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

MGE Energy, Inc.	Yes [X] No [   ]
Madison Gas and Electric Company	Yes [   ] No [X]

Indicate by checkmark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

MGE Energy, Inc.	Yes [  ] No [X]
Madison Gas and Electric Company	Yes [  ] No [X]

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

Indicate by check mark whether the registrants have submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files): Yes [X] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrants' knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [X]

Indicate by check mark if the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definition of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act:

Indicate by checkmark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).

MGE Energy, Inc.	Yes [  ] No [X]
Madison Gas and Electric Company	Yes [  ] No [X]

The aggregate market value of the voting and nonvoting common equity held by nonaffiliates of each registrant as of June 30, 2010, was as follows:

MGE Energy, Inc.	$830,046,005
Madison Gas and Electric Company	$0

The number of shares outstanding of each registrant's common stock as of February 1, 2011, were as follows:

MGE Energy, Inc.	23,113,638
Madison Gas and Electric Company	17,347,894

DOCUMENTS INCORPORATED BY REFERENCE

Portions of MGE Energy, Inc.'s definitive proxy statement to be filed on or before March 23, 2011, relating to its annual meeting of shareholders, are incorporated by reference into Part III of this annual report on Form 10-K.

Madison Gas and Electric Company meets the conditions set forth in General Instruction (I)(1)(a) and (b) of Form 10-K and is therefore omitting (i.) the information otherwise required by Item 601 of Regulation S-K relating to a list of subsidiaries of the registrant as permitted by General Instruction (I)(2)(b), (ii.) the information otherwise required by Item 6 relating to Selected Financial Data as permitted by General Instruction (I)(2)(a), (iii.) the information otherwise required by Item 10 relating to Directors and Executive Officers as permitted by General Instruction (I)(2)(c), (iv.) the information otherwise required by Item 11 relating to executive compensation as permitted by General Instruction (I)(2)(c), (v.) the information otherwise required by Item 12 relating to Security Ownership of Certain Beneficial Owners and Management as permitted by General Instruction (I)(2)(c), and (vi.) the information otherwise required by Item 13 relating to Certain Relationships and Related Transactions as permitted by General Instruction (I)(2)(c).

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Table of Contents

Filing Format

4

Forward-Looking Statements

4

Where to Find More Information

4

PART I.

7

Item 1. Business.

7

Item 1A. Risk Factors.

16

Item 1B. Unresolved Staff Comments.

19

Item 2. Properties.

20

Item 3. Legal Proceedings.

21

Item 4. (Removed and Reserved)

21

PART II.

22

Item 5. Market for Registrants' Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities.

22

Item 6. Selected Financial Data.

25

Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

26

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

49

Item 8. Financial Statements and Supplementary Data.

52

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

69

Item 9A. Controls and Procedures.

69

Item 9B. Other Information.

69

PART III.

69

Item 10. Directors, Executive Officers, and Corporate Governance.

69

Item 11. Executive Compensation.

69

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

69

Item 13. Certain Relationships and Related Transactions, and Director Independence.

69

Item 14. Principal Accounting Fees and Services.

69

PART IV.

69

Item 15. Exhibits and Financial Statement Schedules.

69

Signatures - MGE Energy, Inc.

69

Signatures - Madison Gas and Electric Company

69

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Filing Format

This combined Form 10-K is being filed separately by MGE Energy, Inc. (MGE Energy) and Madison Gas and Electric Company (MGE). MGE is a wholly owned subsidiary of MGE Energy and represents a majority of its assets, liabilities, revenues, expenses, and operations. Thus, all information contained in this report relates to, and is filed by, MGE Energy. Information that is specifically identified in this report as relating solely to MGE Energy, such as its financial statements and information relating to its nonregulated business, does not relate to, and is not filed by, MGE. MGE makes no representation as to that information. The terms "we" and "our," as used in this report, refer to MGE Energy and its consolidated subsidiaries, unless otherwise indicated.

Forward-Looking Statements

This report, and other documents filed by MGE Energy and MGE with the Securities and Exchange Commission (SEC) from time to time, contain forward-looking statements that reflect management's current assumptions and estimates regarding future performance and economic conditions—especially as they relate to future load growth, revenues, expenses, capital expenditures, financial resources, regulatory matters, and the scope and expense associated with future environmental regulation. These forward-looking statements are made pursuant to the provisions of the Private Securities Litigation Reform Act of 1995. Words such as "believe," "expect," "anticipate," "estimate," "could," "should," "intend," and other similar words generally identified forward-looking statements. Both MGE Energy and MGE caution investors that these forward-looking statements are subject to known and unknown risks and uncertainties that may cause actual results to differ materially from those projected, expressed, or implied.

The factors that could cause actual results to differ materially from the forward-looking statements made by a registrant (a) include those factors discussed in Item 1A. Risk Factors, Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations, and Item 8. Financial Statements and Supplementary Data, and (b) other factors discussed in filings made by that registrant with the SEC.

Readers are cautioned not to place undue reliance on these forward-looking statements, which apply only as of the date of this report. MGE Energy and MGE undertake no obligation to publicly release any revision to these forward-looking statements to reflect events or circumstances after the date of this report.

Where to Find More Information

The public may read and copy any reports or other information that MGE Energy and MGE file with the SEC at the SEC's public reference room at 100 F Street, NE, Washington, D.C. 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. These documents also are available to the public from commercial document retrieval services, the website maintained by the SEC at http://www.sec.gov, MGE Energy's website at http://www.mgeenergy.com, and MGE's website at http://www.mge.com. Copies may be obtained from our websites free of charge. Information contained on MGE Energy's and MGE's websites shall not be deemed incorporated into, or to be a part of, this report.

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Definitions, Abbreviations, and Acronyms Used in the Text and Notes of this Report
Abbreviations, acronyms, and definitions used in the text and notes of this report are defined below.
AFUDC	Allowance for Funds Used During Construction
Alliant	Alliant Energy Corporation
ANPR	Advanced Notice of Proposed Rulemaking
ANR	ANR Pipeline Company
ARO	Asset Retirement Obligation
ASM	Ancillary Services Market
ATC	American Transmission Company LLC
BACT	Best Available Control Technology
BART	Best Available Retrofit Technology
Bechtel	Bechtel Power Corporation
Blount	Blount Station
CA	Certificate of Authority
CAA	Clean Air Act
CAIR	Clean Air Interstate Rule
CAVR	Clean Air Visibility Rule
CO2	Carbon Dioxide
Codification	Financial Accounting Standards Board Accounting Standards Codification
Columbia	Columbia Energy Center
cooling degree days	Measure of the extent to which the average daily temperature is above 65 degrees Fahrenheit, which is considered an indicator of possible increased demand for energy to provide cooling
CWA	Clean Water Act
CWDC	Central Wisconsin Development Corporation
DOE	U.S. Department of Energy
Dth	Dekatherms
EEI	Edison Electric Institute
Elm Road Units	Elm Road Generating Station
EPA	United States Environmental Protection Agency
ERISA	Employee Retirement Income Security Act
ERS	Elm Road Services, LLC
FASB	Financial Accounting Standards Board
FERC	Federal Energy Regulatory Commission
FIP	Federal Implementation Plan
FTR	Financial Transmission Rights
GAAP	Generally Accepted Accounting Principles
GCIM	Gas Cost Incentive Mechanism
GHG	Greenhouse Gas
HAPs	Hazardous Air Pollutants
heating degree days (HDD)	Measure of the extent to which the average daily temperature is below 65 degrees Fahrenheit, which is considered an indicator of possible increased demand for energy to provide heating
ICI Boilers	Industrial, Commercial, or Institutional Boilers
ICR	Information Collection Request
ICF	Insurance Continuance Fund
interconnection agreement	Generation-Transmission Interconnection Agreement
IRS	Internal Revenue Service
kV	Kilovolt
kVA	Kilovolt Ampere
kWh	Kilowatt-hour
LIBOR	London Inter Bank Offer Rate
M34	West Marinette Combustion Turbine
MACT	Maximum Achievable Control Technology
MAGAEL	MAGAEL, LLC
MGE	Madison Gas and Electric Company

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MGE Construct	MGE Construct LLC
MGE Energy	MGE Energy, Inc.
MGE Power	MGE Power LLC
MGE Power Elm Road	MGE Power Elm Road, LLC
MGE Power West Campus	MGE Power West Campus, LLC
MGE Transco	MGE Transco Investment LLC
MISO	Midwest Independent System Operator (a regional transmission organization)
MW	Megawatt
MWh	Megawatt-hour
NAAQS	National Ambient Air Quality Standards
Nasdaq	The Nasdaq Stock Market
NERC	National Electric Reliability Council
NNG	Northern Natural Gas Company
NO2	Nitrogen Oxide
NOV	Notice of Violation
NOx	Nitrogen Oxide
NSPS	New Source Performance Standards
NYSE	New York Stock Exchange
OPRB	Other Postretirement Benefits
PCBs	Polychlorinated Biphenyls
PGA	Purchased Gas Adjustment clause
PJM	PJM Interconnection, LLC (a regional transmission organization)
PM	Particulate Matter
PPA	Purchased power agreement
PSCW	Public Service Commission of Wisconsin
PSD	Prevention of Significant Deterioration
REC	Renewable Energy Credit
RTO	Regional Transmission Organization
SEC	Securities and Exchange Commission
SF6	Sulfur Hexafluoride
SIP	State Implementation Plan
SO2	Sulfur Dioxide
the State	State of Wisconsin
Stock Plan	Direct Stock Purchase and Dividend Reinvestment Plan of MGE Energy
UW	University of Wisconsin at Madison
VIE	Variable Interest Entity
WCCF	West Campus Cogeneration Facility
WDNR	Wisconsin Department of Natural Resources
WEPCO	Wisconsin Electric Power Company
Working capital	Current assets less current liabilities
WPDES	Wisconsin Pollutant Discharge Elimination System
WPL	Wisconsin Power and Light Company
WPSC	Wisconsin Public Service Corporation
WRERA	Worker, Retiree and Employer Recovery Act of 2008

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PART I.

Item 1. Business.

MGE Energy operates in the following business segments:

·

Electric utility operations – generating, purchasing, and distributing electricity through MGE.

·

Gas utility operations – purchasing and distributing natural gas through MGE.

·

Nonregulated energy operations – constructing, owning, and leasing new electric generating capacity that will assist MGE through MGE Energy's wholly owned subsidiaries MGE Power Elm Road and MGE Power West Campus.

·

Transmission Investments – representing our investment in American Transmission Company (ATC), a company engaged in the business of providing electric transmission services primarily in Wisconsin.

·

All Other – investing in companies and property which relate to the regulated operations, financing the regulated operations, or providing construction services to the other subsidiaries through its wholly owned subsidiaries MGE Construct, MAGAEL and CWDC, and Corporate functions.

MGE's utility operations represent a majority of the assets, liabilities, revenues, expenses, and operations of MGE Energy. MGE Energy's nonregulated energy operations currently include an undivided interest in a cogeneration facility located on the Madison campus of the University of Wisconsin, which we refer to as the West Campus Cogeneration Facility and an undivided 8.33% ownership interest in two 615 MW coal-fired generating units located in Oak Creek, Wisconsin, which we refer to as the Elm Road Units.

As a public utility, MGE is subject to regulation by the PSCW and the FERC. The PSCW has authority to regulate most aspects of MGE's business including rates, accounts, issuance of securities, and plant and transmission line siting. The PSCW also has authority over certain aspects of MGE Energy as a holding company of a public utility. FERC has jurisdiction, under the Federal Power Act, over certain accounting practices and certain other aspects of MGE's business.

MGE Energy's subsidiaries are also subject to regulation under local, state, and federal laws regarding air and water quality and solid waste disposal. See "Environmental" below.

MGE Energy was organized as a Wisconsin corporation in 2001. MGE was organized as a Wisconsin corporation in 1896. Their principal offices are located at 133 South Blair Street, Madison, Wisconsin 53703, and their telephone number is (608) 252-7000.

Electric Utility Operations

MGE distributes electricity in a service area covering a 316 square-mile area of Dane County, Wisconsin. The service area includes the city of Madison, Wisconsin. It owns or leases ownership interests in electric generation facilities located in Wisconsin and Iowa.

At December 31, 2010, MGE supplied electric service to approximately 139,000 customers, with approximately 90% located in the cities of Fitchburg, Madison, Middleton, and Monona and 10% in adjacent areas. Of the total number of customers, approximately 86% were residential and 14% were commercial or industrial. Electric retail revenues for 2010, 2009, and 2008 were comprised of the following:

Electric operations accounted for approximately 68.5%, 63.3%, and 58.8% of MGE's total 2010, 2009, and 2008 regulated revenues, respectively.

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See Item 2. Properties, for a description of MGE's electric utility plant.

MGE is registered with two Regional Entities, The Midwest Reliability Organization and Reliability First Corporation. The essential purposes of these entities are: (1) the development and implementation of regional and NERC reliability standards, and (2) determining compliance with those standards, including enforcement mechanisms.

Transmission

American Transmission Company is owned by the utilities that contributed facilities or capital in accordance with Wisconsin law. ATC's purpose is to provide reliable, economic transmission service to all customers in a fair and equitable manner. ATC plans, constructs, operates, maintains, and expands transmission facilities that it owns to provide adequate and reliable transmission of power. ATC is regulated by FERC for all rate terms and conditions of service and is a transmission-owning member of the MISO. At December 31, 2010, MGE Transco held a 3.6% ownership interest in ATC.

Regional Transmission Organizations

MISO

MGE is a nontransmission owning member of the MISO. MISO, a FERC approved RTO, is responsible for monitoring the electric transmission system that delivers power from generating plants to wholesale power transmitters. MISO's role is to ensure equal access to the transmission system and to maintain or improve electric system reliability in the Midwest.

MISO maintains a bid-based energy market. MGE offers substantially all of its generation on the MISO market and purchases much of its load requirement from the MISO market in accordance with the MISO Tariff. In January 2009, MISO implemented and MGE began participating in the ancillary services market (ASM). The ASM is an extension of the existing energy market in which MISO assumes the responsibility of maintaining sufficient generation reserves. In the ASM, MISO will provide the reserves for MGE's load, and MGE may offer to sell reserves from its generating units.

In June 2009, MISO implemented and MGE began participating in the voluntary capacity auction. The voluntary capacity auction provides an optional monthly forum for buyers and sellers of aggregate planning resource credits to interact. Load serving entities may participate in the voluntary capacity auction to potentially obtain the necessary aggregate planning resource credits to meet their planning reserve margin requirement. Generator owners may participate to sell any excess aggregate planning resource credits that are not needed.

PJM

MGE is a member of PJM. PJM, an RTO, is a neutral and independent party that coordinates and directs the operation of the region's transmission grid, administers a competitive wholesale electricity market, and plans regional transmission expansion improvements to maintain grid reliability and relieve congestion. MGE has one purchase power agreement, for a total of 50 MW, that is affected by this market.

Fuel supply and generation

MGE satisfies its customers' electric demand with internal generation and purchased power. During the years ended December 31, 2010, 2009, and 2008, MGE's electric energy delivery requirements were satisfied by the following sources:

Sources used depend on market prices, generating unit availability, weather, and customer demand.

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Coal

MGE and two other utilities jointly own Columbia, a coal-fired generating facility, which accounts for 28% (225 MW) of MGE's net summer rated capacity. Power from this facility is shared in proportion to each owner's ownership interest. MGE has a 22% ownership interest in Columbia. The other owners are WPL (a subsidiary of Alliant), which operates Columbia, and WPSC. The Columbia units burn low-sulfur coal obtained (pursuant to long-term contracts) from the Powder River Basin coal fields located in Wyoming and Montana.

MGE's share of the coal inventory supply for the units decreased from approximately 47 days on December 31, 2009, to approximately 21 days on December 31, 2010. The co-owners' current goal is to maintain approximately a 35 day inventory. The inventory is expected to return to that level over the next several months, as coal inventory increases during scheduled annual maintenance outages.

MGE also owns the Blount Generating Facility located in Madison, Wisconsin, which is fueled by gas, coal and other alternative renewable sources. In 2006, MGE announced a plan to reduce capacity at Blount from 190 MW to 100 MW by the end of 2011. In March 2009, MGE received notification from MISO that in order to meet national electric system reliability standards, MGE will need to keep Blount available at its full capacity until MISO declares that the 90 MW are no longer needed for system reliability. Currently, MGE estimates the reduction in capacity will occur in 2013. In January 2010, MGE announced it will change its primary fuel at Blount from coal to natural gas. Coal will become the secondary fuel at Blount. This switch to natural gas as a primary fuel occurred in March 2010. The transition from burning coal to burning only natural gas will still occur by the end of 2011. After the transition, the entire plant will be operated exclusively on natural gas.

See discussion below under Nonregulated Operations for MGE's interest in the Elm Road Units.

Natural gas and oil

MGE owns gas fired combustion turbines. These turbines are primarily located in Madison and Marinette, Wisconsin, and have a total of 156 MW of net summer rated capacity.

See discussion above regarding gas-fired generation at Blount Generating Facility and see discussion below under Nonregulated Operations for MGE's interest in the West Campus Cogeneration Facility.

Renewable generation sources

MGE owns 30 MW consisting of 18 turbines in a wind-powered electric generating facility in Worth County, Iowa. MGE also owns 11 MW consisting of 17 turbines in a wind-powered electric generating facility in Kewaunee County, Wisconsin.

Purchased power

MGE enters into short and long-term purchase power commitments to meet a portion of its anticipated electric energy supply needs. The following table identifies purchase power commitments at December 31, 2010 with unaffiliated parties for the next five years.

		MWs Under Purchase Power Commitments
	Year
	2011	227.1
	2012	227.1
	2013	252.1
	2014	152.1
	2015	152.1

Wind Development Rights

During 2009, MGE Energy, through its subsidiary MAGAEL, LLC, entered into agreements to purchase land development rights, including land option agreements, electrical interconnection rights, wind data, engineering plans, licenses, permits, and governmental approvals for two wind development sites. These wind development rights may potentially be used to develop wind farms in three counties in Iowa up to approximately 175 MWs; however, neither MAGAEL nor MGE Energy has any obligation to build any wind generators at these sites.

Gas Utility Operations

MGE transports and distributes natural gas in a service area covering 1,631 square miles in seven south-central Wisconsin counties. The service area includes the city of Madison, Wisconsin.

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On December 31, 2010, MGE supplied natural gas service to approximately 143,000 customers in the cities of Elroy, Fitchburg, Lodi, Madison, Middleton, Monona, Prairie du Chien, Verona, and Viroqua; 24 villages; and all or parts of 45 townships. Of the total number of customers, approximately 89% were residential and 11% were commercial or industrial. Gas revenues for 2010, 2009, and 2008 were comprised of the following:

Gas operations accounted for approximately 31.5%, 36.7%, and 41.2% of MGE's total 2010, 2009, and 2008 regulated revenues, respectively.

MGE can curtail gas deliveries to its interruptible customers. Approximately 14% of retail gas deliveries in 2010 and 15% in 2009 were to interruptible customers.

Gas supply

MGE has physical interconnections with ANR and NNG. MGE's primary service territory, which includes Madison and the surrounding area, receives deliveries at one NNG and four ANR gate stations. MGE also receives deliveries at NNG gate stations located in Elroy, Prairie du Chien, Viroqua, and Crawford County. Interconnections with two major pipelines provide competition in interstate pipeline service and a more reliable and economical gas supply mix, which includes gas from Canada and from the mid-continent and Gulf/offshore regions in the United States.

During the winter months, when customer demand is high, MGE is primarily concerned with meeting its obligation to firm customers. MGE meets customer demand by using firm supplies under contracts finalized before the heating season, supplies in storage (injected during the summer), and other firm supplies purchased during the winter period.

By contract, a total of 5,419,478 Dth can be injected into ANR's storage fields in Michigan from April 1 through October 31. These gas supplies are then available for withdrawal during the subsequent heating season, November 1 through March 31. Using storage allows MGE to buy gas supplies during the summer season, when prices are normally lower, and withdraw these supplies during the winter season, when prices are typically higher. Storage also gives MGE more flexibility in meeting daily load fluctuations.

MGE's contracts for firm transportation service include winter maximum daily quantities of:

•

166,150 Dth (including 96,078 Dth of storage withdrawals) on ANR.

•

60,108 Dth on NNG.

Nonregulated Energy Operations

MGE Energy, through its subsidiaries, seeks to develop generation sources that will assist MGE in meeting the electricity needs of its customers. Decisions on the type of energy source and its size, timing, ownership, and financing depend upon a number of factors including the growth of customer demand in MGE's service area and surrounding areas, the effectiveness of customer demand management efforts, the costs and availability of alternative power sources, mandates regarding renewable energy resources, the availability of transmission capacity, issues associated with siting power generation sources, available financing and ownership structures, regulatory treatment and recovery, construction lead times and risks, environmental regulations, and other factors. The decisions tend to involve long-time horizons due to the lead time involved in siting and constructing new generation sources and the associated transmission infrastructure.

WCCF

MGE Power West Campus and the UW jointly own undivided interests in a natural gas-fired cogeneration facility on the UW campus. The facility has the capacity to produce 20,000 tons of chilled water, 500,000 pounds per hour of steam, and approximately 150 MW of electricity. The UW owns 45% of the facility, which represents its interest in the chilled-water and steam assets. These assets are used to meet the UW's growing need for air-conditioning and steam-heat capacity. MGE Power West Campus owns 55% of the facility, which represents its interest in the electric generating assets. These assets are used to provide electricity to MGE's customers. The UW's share of the plant and

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portion of the earnings from the WCCF are not reflected in the consolidated financial statements of MGE Energy or MGE. MGE Power West Campus' share of the cost of this project is reflected in property, plant, and equipment on MGE Energy's and MGE's consolidated balance sheets.

MGE leases the electric generating assets owned by MGE Power West Campus and is responsible for operating the entire facility. The financial terms of the facility lease include a capital structure of 53% equity and 47% long-term debt, return on equity of 12.1%, and a lease term of 30 years. At the end of the lease term in 2035, MGE may, at its option, renew the facility lease for an additional term, purchase the generating facility at fair market value or allow the lease contract to end.

Elm Road

MGE Power Elm Road and two other owners own undivided interests in the coal-fired Elm Road Units in Oak Creek, Wisconsin. Unit 1 entered commercial operation on February 2, 2010, and has the capacity to produce 615 MW of electricity. Unit 2 entered commercial operation on January 12, 2011, and has the capacity to produce 615 MW of electricity. Wisconsin Energy Corporation owns approximately 83% of the Elm Road Units and is the operator for those units. MGE Power Elm Road owns an 8.33% ownership interest in both units. Both units are used to provide electricity to MGE's customers.

MGE leases MGE Power Elm Road's ownership interest in the Elm Road Units pursuant to two separate facility leases. The financial terms of each facility lease include a capital structure of 55% equity and 45% long-term debt, return on equity of 12.7%, and a lease term of 30 years. At the end of the respective lease terms, MGE may, at its option, renew the facility lease for an additional term, purchase the leased ownership interest at fair market value or allow the lease to end. The Unit 1 and Unit 2 leases commenced with the commercial operation of each respective unit.

MGE Power Elm Road's estimated share of capital costs for its ownership interest in the Elm Road Units is approximately $180 million (excluding capitalized interest). These costs have been financed primarily through funds received from MGE Energy, which came from the sale of common stock (via the Stock Plan), short-term debt, and operating cash flows. On February 4, 2010, MGE Power Elm Road issued $50 million of 5.04% senior secured notes due 2040 to reimburse MGE Energy for a portion of its funds. As of December 31, 2010, $122.6 million related to this project was placed in-service and $55.1 million (excluding capitalized interest) related to this project is reflected in the construction work in progress balance on MGE Energy's and MGE's consolidated balance sheets.

On November 1, 2005, MGE received approval from the PSCW to defer payments made to MGE Power Elm Road for carrying costs during construction of the facility, management fees, and community impact mitigation costs. MGE began collecting the carrying costs in rates in 2006. MGE estimates total carrying costs to be approximately $62.6 million. Of these costs, $17.1 million is estimated to relate to the capitalized interest on the debt portion of the facility. These costs will be recognized over the period in which the facility will be depreciated. The remaining $45.5 million is estimated to represent the equity portion and is being recognized over the period recovered in rates.

See Footnote 21 of Notes to Consolidated Financial Statements in Item 8. Financial Statements and Supplementary Data of this Form 10-K for more information regarding the Elm Road Units.

Environmental

MGE is subject to frequently changing local, state, and federal regulations concerning air quality, water quality, land use, threatened and endangered species, hazardous materials handling, and solid waste disposal. These regulations affect the manner in which MGE conducts its operations, the costs of those operations, as well as some capital and operating expenditures. They can also affect the siting, timing, and cost of new projects or other significant actions affecting the environment. Some of the most significant are addressed below. MGE is not able to predict with certainty the direction of future regulations or if compliance with any such regulations will involve additional expenditures for pollution control equipment, plant modifications, or curtailment of operations. Such actions could reduce capacity or efficiency at existing plants or delay the construction and operation of future generating facilities. MGE management would expect to seek and receive rate recovery for costs associated with installation approval of pollution controls.

Air quality

Air quality regulations promulgated by the EPA and WDNR in accordance with the Federal Clean Air Act and the Clean Air Act Amendments of 1990 impose restrictions on emission of particulates, sulfur dioxide (SO₂), nitrogen oxides (NO_x) and other pollutants and require permits for operation of emission sources. These permits must be renewed periodically. Various newly enacted and/or proposed federal and state initiatives are expected to result in additional operating and capital expenditure costs for electric generating units.

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Clean Air Interstate Rule (CAIR) and the Proposed Transport Rule

The CAIR requires NO_x and SO₂ emission reductions, from Midwest and eastern U.S. fossil fuel-fired electric generating units (EGUs) in two phases and includes a regional cap-and-trade system. The first phase began in 2009 for NO_x and in 2010 for SO₂, and contemplates reductions from 2003 levels of 55% and 40%, respectively, increasing in the second phase (in 2015) to 65% and 70%, respectively (from 2003 levels). MGE owns or has partial ownership in several generation units currently subject to the CAIR: Blount Generating Station, Columbia, the Elm Road Units, M34 (West Marinette Combustion Turbine) and Fitchburg Combustion Turbines.

In December 2008, the D.C. Circuit Court remanded the CAIR to the EPA for further review. In July 2010, the EPA introduced the proposed "Transport Rule" to replace CAIR. Similar to the CAIR, the Transport Rule is intended to reduce NO_x and/or SO₂ air emissions from fossil fuel-fired EGUs in the Midwest and eastern U.S. The proposed rule includes three alternative approaches to reducing emissions. Two of the proposed approaches allow limited allowance trading; one does not permit allowance trading. The EPA is seeking comments on these approaches. The EPA is targeting 2012 for implementation of the first phase of the Transport Rule. The CAIR remains in effect until the Transport Rule is in place. MGE anticipates that it may need to purchase NO_x and SO₂ allowances, install central equipment or implement other strategies to meet these requirements for its generation fleet. See Columbia subsection in Footnote 18.d for more information on the pending application to install environmental controls at Columbia.

Wisconsin State Mercury Rule

Wisconsin has adopted a phased approach to mercury emission reductions. Under phase one, as of January 2010, "major utilities," such as the operators of Columbia and the Elm Road Units, must achieve a 40% fleet-wide mercury emissions reduction (as compared to an average of 2002, 2003, and 2004 baseline mercury emissions).

Under phase two, beginning January 1, 2015, large coal-fired electric generating units (larger than 150 MW) must reduce mercury emissions by 90%, or follow a multi-pollutant reduction approach, which allows a stepped approach to mercury reduction while also reducing NO_x and SO₂ emissions at prescribed rates. See Footnote 18.d for a discussion of these rules and their effects.

Maximum Achievable Control Technologies (MACT) Standards for Hazard Air Pollutants

In January 2010, as part of the EPA's process for developing MACT standards related to emissions of hazardous air pollutants for electric utilities, the EPA sent out an Information Collection Request (ICR) to hundreds of utilities across the United States that have coal and oil-burning EGUs. Information collected from the ICR will help the EPA develop a Utility MACT rule which the EPA has indicated they plan to publish by November 2011. Although we cannot predict the outcome of the Utility MACT Rule at this time, our coal and oil-burning EGUs may need to incur additional capital expenditures and install additional pollution controls to meet the Utility MACT standard(s).

In April 2010, the EPA issued a draft MACT standard regarding hazardous air pollutant emission standards for industrial, commercial and institutional boilers (ICI Boiler MACT) in response to a court ruling that vacated a prior standard.

 

Pending adoption of a final rule, the EPA has determined that case-by-case determinations be applied to all ICI boilers regardless of whether or not they were exempt under the vacated rule. The WDNR, following the EPA's interpretation, has required that all facilities with ICI boilers submit initial applications.

MGE has boilers at Blount and Columbia classified as ICI boilers and has submitted the required initial applications to the WDNR. The WDNR has granted several extensions in anticipation of the EPA's ICI Boiler MACT rule being finalized. The latest extension granted by the WNDR lasts until March 15, 2011.

If the boilers at Blount and Columbia are ultimately covered by the EPA ICI Boiler MACT rule when finalized, it may be necessary to test or limit emissions and/or install additional pollution controls. Because of the uncertainty with this rule at this time, we cannot predict when or if we will need additional resources or capital to comply.

Clean Air Visibility Rule (CAVR)

Air modeling indicates that SO₂ and NO_x emissions (and to a lesser extent particulate matter, or PM) from Columbia may impair visibility at certain Class I Scenic Areas and may therefore be subject to the best available retrofit technology (BART) regulations, a subsection of the EPA's Clean Air Visibility Rule (CAVR). Units that are subject to BART and shown to affect Class I Scenic Areas may be required to install pollution controls to combat their contribution to visibility at those locations. BART is applied on a case-by-case basis.

Under CAIR, both the EPA and WDNR concluded that compliance with CAIR emissions limitations would serve as compliance with BART requirements for SO₂ and NO_x emissions. Thus owners subject to BART obligations had the

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option of purchasing allowances under the CAIR rather than installing pollution controls. However, with the introduction of the EPA's Transport Rule, the future of BART regulation and compliance strategies and costs is uncertain.

The CAVR also requires states to submit a State Implementation Plan (SIP) that outlines how states will achieve reductions in visibility impairments over time. In January 2009, the EPA found Wisconsin proposed CAVR SIP deficient. Wisconsin has until January 2011 to submit a revised CAVR SIP. If no CAVR SIP is submitted within that two year period (which ends in January 2011), then the EPA must promulgate a Federal Implementation Plan (FIP) for the State of Wisconsin. Without a proposed CAVR implementation rule in place, it is unclear to what extent MGE's generation plants will be affected.

Nitrogen Oxide Emission Budget

In 1998, the EPA issued a rule that imposed a NO_x emission budget for emission sources in Wisconsin (NO_x SIP Call). In 2000, the United States Court of Appeals for the District of Columbia invalidated a portion of the NO_x SIP Call concerning Wisconsin's alleged impacts on downwind, 1-hour ozone nonattainment areas. The EPA has also stated that portion of the NO_x SIP Call concerning Wisconsin's alleged impacts on downwind 8-hour ozone nonattainment areas. If that portion of the rule concerning 8-hour ozone nonattainment areas is upheld, the resulting NO_x emission budget for Wisconsin could potentially affect the level of permissible NO_x emissions from Blount, Columbia, and WCCF.

National Ambient Air Quality Standards (NAAQS)

The EPA has developed National Ambient Air Quality Standards (NAAQS) for six compounds currently identified as criteria pollutants: nitrogen dioxide (NO₂), particulate matter (PM), ozone, SO₂, lead and carbon monoxide. The NAAQS for criteria pollutants establish acceptable ambient air levels based on effects to human health and the environment. The EPA is required to review NAAQS every five years. Monitoring data is used to determine whether areas are in compliance with NAAQS. For areas found in noncompliance, states must develop plans to bring those areas into compliance. The plans can require emissions reductions and/or pollution controls. Changes in NAAQS standards can affect whether an area is in compliance and thus affect compliance costs for activities in those areas, including capital, operational and maintenance expenses at MGE generating facilities. See Footnote 18.d for discussion of recent developments affecting the NAAQS for particular matter, ozone, nitrogen dioxide and sulfur dioxide.

Columbia

Columbia is a coal-fired generating station operated by WPL in which WPL, WPSC and MGE have ownership interests. In September 2010, the Sierra Club filed a civil lawsuit against WPL alleging violations of the CAA at Columbia and other Wisconsin facilities operated by WPL. See Footnote 18.d for additional information regarding these matters.

Water quality

EPA and WDNR water quality regulations promulgated in accordance with the Federal Water Pollution Control Act, or more commonly known as the Clean Water Act (CWA), restrict emissions of pollutants into surface waters and regulate surface water quality issues that affect aquatic life, such as water temperatures, intake structures, and wetlands filling. The CWA also sets discharge standards requiring the use of effluent-treatment processes equivalent to categorical "best practicable" or "best available" technologies. The CWA regulates discharges from "point sources" (such as power plants) through discharge limits in water discharge permits. MGE's power plants operate under the Wisconsin Pollution Discharge Elimination System (WPDES) permits to ensure compliance with these discharge limits. The WDNR has recently published regulations for phosphorus, mercury and thermal discharges from electric-steam generating plants. See Footnote 18.d for information regarding these regulations.

EPA Cooling Water Intake Rules (Section 316(b))

In 2004, the EPA promulgated final rules under Section 316(b) of the CWA addressing cooling water intake structures for existing large power plants. In a January 2007 court decision, significant parts of the rule were remanded to the EPA for further consideration. In July 2007, the EPA suspended the rule in its entirety and directed states to use their "best professional judgment" in evaluating intake systems. In December 2010, the EPA entered a settlement agreement which commits them to propose revised 316(b) rules by March 2011 and finalize requirements by June 2012. It is not known at this time whether and to what extent MGE's plants will be affected by this rule.

WPDES permit – Elm Road

Under a settlement agreement reached in July of 2008, the joint owners of Elm Road are committed to various environmental projects, including projects designed to address greenhouse gas emissions and water quality. MGE's share of those commitments involved a payment of $0.4 million for greenhouse gas reduction efforts. Additional payments of approximately $0.3 million, subject to regulatory approval, will be made annually over 24 years (2011-

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2034) to address water quality issues in Lake Michigan. In December 2009, the PSCW authorized recovery of the 2011 payment to address water quality issues.

Solid waste

Lenz Oil Site

MGE is listed as a potentially responsible party for a site on the EPA's national priorities Superfund list. The Lenz Oil site in Lemont, Illinois, was used for storing and processing waste oil for several years. This site requires cleanup under the Comprehensive Environmental Response, Compensation and Liability Act. As of December 31, 2009, the EPA has agreed on a remedy for the Lenz Oil site. The remedy included a five year $2.2 million implementation plan. The EPA has asked all potentially responsible parties to pay upfront for this five year implementation plan. MGE has provided money for site cleanup, however, the cleanup process has not begun. We will not know if additional costs exist at the site until cleanup is completed. At December 31, 2010, MGE's portion is less than $0.1 million. Management believes that its share of the final cleanup costs for the Lenz Oil site will not result in any materially adverse effects on MGE's operations, cash flows, or financial position. Insurance may cover a portion of the cleanup costs. Management believes that the cleanup costs not covered by insurance will be recovered in current and future rates.

Proposed Regulation of Coal Combustion Byproducts

The EPA published a proposed rule on May 4, 2010, that regulates coal combustion byproducts from the electric generating sector. The proposed regulations may require new or additional monitoring of storage sites, may re-classify ash and other coal combustion byproducts, and may regulate ash storage site structural design. MGE is evaluating the impact of these proposed regulations on our operations. It is not possible to estimate the potential costs associated with the implementation of any of these initiatives at this time.

Other Environmental Issues

Polychlorinated Biphenyls (PCBs) Regulations

On April 7, 2010, the EPA published an Advanced Notice of Proposed Rulemaking (ANPR) for the additional regulation of polychlorinated biphenyls (PCBs). The EPA intends to reassess the use, distribution, marking, and storage for reuse of liquid PCBs in electric and nonelectric equipment. The rule may require additional testing and potentially a phase-out of PCBs in electrical and nonelectrical equipment. MGE has electrical equipment that contains liquid PCBs, thus any rule that is developed has a potential to affect our capital or operational costs. We cannot predict the extent of this rule's impact until the rule is proposed and/or finalized.

Wisconsin Listing of Four Bat Species as Threatened in the State

On December 8, 2010, the Wisconsin Board of Natural Resources approved modifications to existing rules to give four cave bat species threatened species status in Wisconsin. The cave bat threatened status designation may affect some MGE projects, specifically wind power projects and electric or natural gas distribution projects near wetlands. MGE will continue to monitor this rule and WDNR guidance that is developed to fully understand how it may affect our capital and operational projects.

Global climate change

MGE is a producer of GHG emissions, primarily from the fossil fuel generating facilities it utilizes to meet customers' energy needs, as well as from its natural gas pipeline system and fleet vehicles. Climate change and the regulatory response to it could significantly affect our operations in a number of ways, including increased operating costs and capital expenditures, restrictions on energy supply options, permitting difficulties and emission limits. The probability and specific impact of such regulation cannot be reasonably estimated until final legislation and/or regulations are passed. MGE management would expect to seek and receive rate recovery of such compliance costs, if and when required. MGE will continue to monitor proposed climate change legislation and regulation.

MGE is already addressing GHG emissions through voluntary actions. In 2005, MGE announced its Energy 2015 Plan, which commits to ensuring a balanced, economic energy supply with reduced environmental emissions. The Plan emphasizes increased renewable energy, energy efficiency and new cleaner generation – three strategies that reduce GHG emissions. Under MGE's Energy 2015 Plan and other actions, our CO₂ emissions are currently projected to decline from 2005 to 2015 even though total system energy is estimated to increase. Implementation of our Energy 2015 Plan is well underway and we are committed to achieving its goals. However, a number of factors, including but not limited to, changes in economic conditions, regulatory actions, customer response, energy supply issues and transmission delays, may require us to update and perhaps refine certain aspects of our Energy 2015 Plan accordingly. The cost of implementing our Energy 2015 Plan is not expected to result in any materially adverse effects on MGE's operations, cash flows, or financial position. Management believes that costs to implement the Energy 2015 Plan will be recoverable through rates.

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EPA Rule on Greenhouse Gas Reporting

In September 2009, the EPA issued its GHG mandatory reporting rule. MGE is collecting the data needed to file the required report on 2010 GHG emissions by March 31, 2011. Beginning on January 1, 2011 with a March 31, 2012 reporting requirement, the EPA added sulfur hexafluoride (SF6) used in electrical transmission and GHG releases from natural gas transport to the reporting rule, two items that have the potential to affect MGE. MGE continues to monitor the EPA's evolving GHG reporting rule.

EPA's Determination of Endangerment from Greenhouse Gases

In December 2009, the EPA found that six GHGs, when emitted from new motor vehicles, contribute to greenhouse gas air pollution and endanger public health and welfare under CAA Section 202(a). This endangerment finding allowed for the creation of GHG emission standards from mobile sources, which were finalized by the EPA on March 31, 2010. This in turn paves the way for stationary source emissions of GHGs to be regulated under the CAA. See our discussion on the EPA's Prevention of Significant Deterioration and Title V Greenhouse Gas Tailoring Rule, and our discussion on the EPA's schedule to develop GHG emissions standards for utilities for additional information on how the EPA has begun regulating GHG emissions from stationary sources.

EPA's Prevention of Significant Deterioration and Title V Greenhouse Gas Tailoring Rule

On May 13, 2010, the EPA released its Greenhouse Gas "Tailoring Rule" to address the regulation of stationary sources for GHG emissions. Through this Tailoring Rule, the regulation of GHGs will be accomplished using the EPA's two principal stationary source CAA permitting programs: the pre-construction permitting Prevention of Significant Deterioration (PSD) program and the operations permitting (Title V) program.

Beginning in January 2011,the EPA's Tailoring Rule has been designed to "phase in" facilities subject to PSD or Title V permitting (i.e. new facilities and existing facilities with certain qualifying modifications). Under the Tailoring Rule, it is understood that PSD requirements for covered new or modified sources include the requirement that a plant meet Best Available Control Technology (BACT) requirements for emissions that trigger PSD, including GHG emissions. The EPA has provided draft guidelines on conducting a BACT Analysis. MGE facilities may become subject to this rule if modifications at any facilities trigger PSD or if MGE invests in new facilities that trigger PSD. In addition, MGE's facilities will likely need to include GHG emissions information in their Title V permits as they are renewed.

EPA's Plan to Establish Greenhouse Gas Emission Standards for Fossil-Fuel Fired Utilities

On December 30, 2010, the EPA announced a proposed schedule for regulating GHGs under Section 111 of the Clean Air Act. As part of a settlement agreement with several states and environmental nongovernmental organizations, the EPA agreed to propose by July 26, 2011, New Source Performance Standards (NSPS) for new and/or modified fossil-fuel burning EGUs and proposed guidelines for states' GHG emissions standards for existing EGUs. The EPA also agreed to take final action on both of these by May 26, 2012. As part of this notice, the EPA has not indicated at what level emissions standards will be set. Given the uncertainties associated with this initiative, we cannot estimate the effect that compliance may have on our generating operations, cash flows, and financial position.

Proposed Climate Change Legislation

Federal Actions on Climate Change

The 111^th Congress ended without enactment of comprehensive climate change legislation in spite of significant activity. The U.S. House of Representatives in the 112^th Congress has introduced several bills related to GHG regulation including bills to prevent the EPA from receiving funding for a cap-and-trade program for greenhouse gases as well as bills to prevent or delay the EPA's regulation of GHGs under the current Clean Air Act.

State and Regional Actions on Climate Change

Wisconsin Governor Doyle's Global Warming Task Force issued a July 2008 report with numerous recommendations to address GHG emissions. MGE participated as an active member of the Task Force. Several PSCW proceedings were commenced as a result of Task Force recommendations. Many of the recommendations made by the Task Force were included in state legislation in early 2010, but no legislation was enacted. It is unlikely the Wisconsin Senate or Assembly will push for broad GHG regulation in 2011.

In addition, in November 2007, Wisconsin, along with Illinois, Iowa, Kansas, Michigan, Minnesota, and Manitoba, Canada signed on to the Midwestern GHG Accord – an accord designed to develop a Midwestern GHG reduction program. The Advisory Group recommended numerous regional actions be taken to help reduce GHGs. Wisconsin has not developed rules or legislation to implement these recommendations.

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Employees

As of December 31, 2010, MGE had 701 employees. MGE employs 222 employees who are covered by a collective bargaining agreement with Local Union 2304 of the International Brotherhood of Electrical Workers and 98 employees who are covered by a collective bargaining agreement with Local Union No. 39 of the Office and Professional Employees International Union. Both of these collective bargaining agreements expire on April 30, 2012. There are also 5 employees covered by a collective bargaining agreement with Local Union No. 2-111 of the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial, and Service Workers International Union. This collective bargaining agreement expires on October 31, 2012.

Financial Information About Segments

See Footnote 23 of the Notes to Consolidated Financial Statements for financial information relating to MGE Energy's and MGE's business segments.

Executive Officers of the Registrants

Note: Ages, years of service, and positions as of December 31, 2010.

(a) Executive officer of MGE Energy and MGE.

(b) Executive officer of MGE

Item 1A. Risk Factors.

MGE Energy and its subsidiaries, including MGE, operate in a market environment that involves significant risks, many of which are beyond their control. The following risk factors may adversely affect their results of operations, cash flows and market price for their publicly traded securities. While MGE Energy and MGE believe they have identified and discussed below the key risk factors affecting their business, there may be additional risks and uncertainties that are not presently known or that are not currently believed to be significant that may adversely affect their performance or financial condition in the future.

Regulatory Risk

We are subject to extensive government regulation in our business, which affects our costs and responsiveness to changing events and circumstances.

Our business is subject to regulation at the State and Federal levels. We are subject to regulation as a holding company by the PSCW. MGE is regulated by the PSCW as to its rates, terms and conditions of service; various business practices and transactions; financing; and transactions between it and its affiliates, including MGE Energy. MGE is also subject to regulation by the FERC, which regulates certain aspects of its business. The regulations adopted by the State and Federal agencies affect the manner in which we do business, our ability to undertake specified actions since pre-approval or authorization may be required, the costs of operations, and the level of rates charged to recover such costs. Our ability to attract capital is also dependent in part, upon our ability to obtain a fair return from the PSCW.

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We face risk for the recovery of fuel and purchased power costs.

MGE burns natural gas in several of its peak electric generation facilities, and in many cases, the cost of purchased power is tied to the cost of natural gas. Under the electric fuel rules, MGE would be required to make a refund to customers if the fuel rules costs fall outside the lower end of the range and would be allowed to request a surcharge if the fuel rules costs exceeded the upper end of the range. The range is defined by the PSCW and is currently plus or minus 2%. MGE assumes the risks and benefits of variances that are within the bandwidth.

We are subject to changing environmental laws and regulations that may affect our costs and business plans.

Our subsidiaries are subject to environmental laws and regulations that affect the manner in which they conduct business, including capital expenditures, operating costs and potential liabilities. Changes and developments in these laws and regulations may alter or limit our business plans, make them more costly, or expose us to liabilities for past or current operations.

Numerous environmental laws and regulations govern many aspects of our present and future operations, including air emissions, water quality, wastewater discharges, solid waste, threatened and endangered species and hazardous waste. These evolving regulations can introduce uncertainty projects, and can introduce costly delays if previous decisions need to be revisited as a result of judicial mandate or regulatory change. These regulations generally require us to obtain and comply with a wide variety of environmental permits and approvals, and can result in increased capital, operating, and other costs, particularly with regard to enforcement efforts focused on power plant emissions obligations. These effects can be seen not only with respect to new construction, such as our participation in the Elm Road generating units, but could also require the installation of additional control equipment or other compliance measures such as altered operating conditions at existing facilities such as Columbia or Blount.

In addition, we may be a responsible party for environmental clean-up at current or future sites identified as containing hazardous materials. It is difficult to predict the costs potentially associated with a site clean-up due to the potential joint and several liability for all potentially responsible parties, the nature of the clean-up required and the availability of recovery from other potentially responsible parties.

Additionally, if adopted, legislative and regulatory GHG initiatives could have the potential for a significant financial impact on MGE, including the cost to install new emission control equipment, purchase allowances, or do fuel switching.

Operating Risk

We are affected by weather, which affects customer demand and can affect the operation of our facilities.

The demand for electricity and gas is affected by weather. Very warm and very cold temperatures, especially for prolonged periods, can dramatically increase the demand for electricity for cooling and heating, respectively, as opposed to the softening effect of more moderate temperatures. Our electric revenues are sensitive to the summer cooling season and, to a lesser extent, the winter heating season. Similarly, very cold temperatures can dramatically increase the demand for gas for heating. A significant portion of our gas system demand is driven by heating. Extreme summer conditions or storms may stress electric transmission and distribution systems, resulting in increased maintenance costs and limiting the ability to meet peak customer demand.

We are affected by economic activity within our service area.

Higher levels of development and business activity generally increase the numbers of customers and their use of electricity and gas. Likewise, periods of recessionary economic conditions generally adversely affect our results of operations.

Our ability to manage our purchased power costs is influenced by a number of uncontrollable factors.

We are exposed to additional purchased power costs to the extent that our power needs cannot be fully covered by the supplies available from our existing facilities and contractual arrangements. Those needs, and our costs, could be affected by:

·

Increased demand due to, for example, weather, customer growth, or customer obligations,

·

The inability to transmit our contracted power from its generation source to our customers due to transmission line constraints, outages, or equipment failures,

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·

Reductions in the availability of power from our owned or contracted generation sources due to equipment failures, shortages of fuel or environmental limitations on operations, and

·

Failure to perform on the part of any party from which we purchase capacity or energy.

An unexpected change in demand or the availability of generation or transmission facilities can expose us to increased costs of sourcing electricity in the short-term market where pricing may be more volatile.

Our financial performance depends on the equipment and facilities in our distribution system being operational.

Weather conditions, accidents, catastrophic events, and failures of equipment or facilities can disrupt or limit our ability to deliver electricity and gas. Efforts to repair or replace equipment and facilities may not be successful, or we may be unable to make the necessary improvements to our distribution system, causing service interruptions. The resulting interruption of services could result in lost revenues and additional costs.

We face construction risk in connection with the completion of generating units.

We have assumed risks under the agreements related to our ownership interest in two 615 MW coal-fired generating units in Oak Creek, Wisconsin. If the units' final construction costs exceed the fixed costs allowed in the PSCW order, this excess will not be recoverable from MGE or its customers unless specifically allowed by the PSCW. Any Oak Creek project costs above the authorized amount will be subject to a prudence determination made by the PSCW.

Financial Risk

We are exposed to commodity price risk relating to our purchases of natural gas, electricity, coal and oil.

We face commodity price risk exposure with respect to our purchases of natural gas, electricity, coal and oil, SO₂ allowances and risk through our use of derivatives, such as futures, forwards and swaps, to manage that commodity price risk. We could experience increased costs as a result of volatility in the market values of those commodities. We could also experience losses on our derivative contracts as a result of that market value volatility or if a counterparty fails to perform under a contract. In the absence of actively quoted market prices and pricing information from external sources, the valuation of these derivative contracts involves our exercise of judgment and use of estimates. As a result, changes in the underlying assumptions or use of alternative valuation methods could affect the reported fair value of these contracts.

We are exposed to interest rate risk.

We are exposed to interest rate risk on our variable rate financing. MGE Energy had $22.5 million of variable-rate debt outstanding at December 31, 2010, including $3.5 million for MGE. Borrowing levels under commercial paper arrangements vary from period to period depending upon capital investments and other factors. Such interest rate risk means that we are exposed to increased financing costs and associated cash payments as a result of changes in the short-term interest rates. Also, interest rates affect discount rates which are a key assumption for our defined benefit pension plans and may impact the amount of expense and timing of contributions to the plan.

Market performance affects our employee benefit plan asset values.

The performance of the capital markets affects the values of the assets that are held in trust to satisfy the future obligations under our pension and postretirement benefit plans. We have significant obligations in these areas and hold significant assets in these trusts. A decline in the market value of those assets may increase our current and longer-term funding requirements for these obligations. Changes in the value of trust fund assets may affect the level of required contributions to these trusts to meet benefit obligations. Reduced benefit plan assets could result in increased benefit costs in future years and may increase the amount and accelerate the timing of required future funding contributions.

We are exposed to credit risk primarily through our regulated energy business.

Credit risk is the loss that may result from counterparty nonperformance. We face credit risk primarily through MGE's regulated energy business. Failure of contractual counterparties to perform their obligations under purchase power agreements, commodity supply arrangements or other agreements may result in increased expenses for MGE as a result of being forced to cover the shortfall in the spot or short-term market, where prices may be more volatile.

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As a holding company, we are dependent on upstream cash flows from our subsidiaries for the payment of dividends on our common stock.

As a holding company, we have no operations of our own, our ability to pay dividends on our common stock is dependent on the earnings and cash flows of our operating subsidiaries and their ability to pay upstream dividends or to repay funds to us. Prior to funding us, our subsidiaries have financial obligations that must be satisfied, including among others, debt service and obligations to trade creditors, and are subject to contractual and regulatory restrictions on the payment of dividends.

Disruptions in the financial markets may affect our ability to finance at a reasonable cost and in accordance with our planned schedule.

The credit markets have experienced some recent disruption and uncertainty. To the extent that such issues affect the ability or willingness of credit providers or investors to participate in the credit markets or particular types of investments, or affect their perception of the risk associated with particular types of investments, our cost of borrowing could be affected.

General economic conditions may affect our operating revenues, our capital costs and our counterparty risks.

Operational

MGE Energy's and MGE's operations are affected by local, national and worldwide economic conditions. The consequences of a prolonged period of reduced economic activity may include lower demand for energy, uncertainty regarding energy prices and the capital and commodity markets, and increased credit risk. A decline in energy consumption may adversely affect our revenues and future growth. Increased credit risk reflects the risk that our retail customers will not pay their bills in a timely manner or at all, which may lead to a reduction in liquidity and an eventual increase in bad debt expense.

Liquidity

Long-term instability in the financial markets, as a result of recession or otherwise, also may affect the cost of capital and our ability to raise capital. Although MGE Energy and MGE believe they have sufficient liquidity despite the disruption of capital and credit markets, the costs of such funds may increase.

Counterparty creditworthiness

Credit risk also includes the risk that trading counterparties that owe us money or product will breach their obligations. MGE's risk management policy is to limit transactions to a group of high quality counterparties. Should the counterparties to these arrangements fail to perform, we may be forced to enter into alternative arrangements. In that event, our financial results could be adversely affected and we could incur losses.

Item 1B. Unresolved Staff Comments.

MGE Energy and MGE

None.

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Item 2. Properties.

Electric Generation

Net summer rated capacity in service at December 31, 2010, was as follows:

(1) Net summer rated capacity is determined by annual testing and may vary from year to year due to, among other things, the operating and physical conditions of the units.

(2) Baseload generation.

(3) MGE's 22% share of two 512-MW units. The other owners are WPL (a subsidiary of Alliant), which operates Columbia, and WPSC.

(4) On January 19, 2006, MGE announced that it would cease coal-fired generation at Blount in 2011, subject to certain conditions, including regulatory approvals. In March 2010, natural gas became the primary fuel and coal became the secondary fuel.

(5) Facility is jointly owned. MGE Power West Campus owns a controlling interest in the electric generation plant and the UW owns a controlling interest in the chilled-water and steam plants. MGE leases the electric generating assets owned by MGE Power West Campus and is responsible for operating the facility. Amounts shown represent MGE's share of the net summer rated capacity. Based on the terms of the joint plant agreement between MGE and the UW, the UW has the ability to reduce net capability of these units by approximately 17 MW in the summer. The net summer rated capacity shown reflects this decrease.

(6) MGE's 8.33% share in each of two 615 MW coal-fired generating units. MGE leases the electric generating assets owned by MGE Power Elm Road. Unit 1 entered commercial operation in February 2010. Amounts shown represent MGE's share of the net summer rated capacity of Unit 1. Unit 2 entered commercial operation in January 2011.

(7) Three facilities are owned by MGE and three facilities are leased.

(8) These facilities are owned by MGE.

(9) Nameplate capacity rating is 11 MW.

(10) Nameplate capacity rating is 30 MW.

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Electric and Gas Distribution Facilities

Major electric distribution lines and substations in service at December 31, 2010, which are owned by MGE, are as follows:

	Miles
Distribution lines:	Overhead		Underground
13.8 kV and under	905		1,110
Distribution:	Substations		Installed Capacity (kVA)
69-13.8 kV	27		1,019,000
13.8-4 kV	29		294,967

Gas facilities include 2,547 miles of distribution mains, which are owned by MGE.

A significant portion of MGE's electric and gas distribution facilities is located above or underneath highways, streets, other public places or property that others own. MGE believes that it has satisfactory rights to use those places or property in the form of permits, grants, easements and licenses; however, it has not necessarily undertaken to examine the underlying title to the land upon which the rights rest.

Encumbrances

The principal plants and properties of MGE are subject to the lien of its Indenture of Mortgage and Deed of Trust dated as of January 1, 1946, as amended and supplemented, under which MGE's first mortgage bonds are issued. As of December 31, 2010, there were $1.2 million of first mortgage bonds outstanding. See Footnote 9 for additional information regarding MGE's first mortgage bonds.

MGE Power West Campus has collaterally assigned its right to lease payments from MGE for the WCCF in order to secure the repayment of $50 million of senior secured notes issued by MGE Power West Campus. See Footnote 9 for additional information regarding these senior notes.

MGE Power Elm Road has collaterally assigned its right to lease payments from MGE for the Elm Road Units in order to secure the repayment of $50 million of senior secured notes issued by MGE Power Elm Road. See Footnote 9 for additional information regarding these senior notes.

Item 3. Legal Proceedings.

MGE Energy and MGE

MGE Energy and its subsidiaries, including MGE, from time to time are involved in various legal proceedings that are handled and defended in the ordinary course of business.

See "Environmental" under Item 1, Business, and Footnote 18d for a description of several environmental proceedings involving MGE. See Footnote 18i for a description of other legal matters.

Item 4. (Removed and Reserved)

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PART II.

Item 5. Market for Registrants' Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities.

Market for Common Equity

MGE Energy

MGE Energy common stock is traded on Nasdaq under the symbol MGEE. On February 1, 2011, there were approximately 35,536 shareholders of record, including registered and beneficial shareholders. The following table shows high and low sale prices for the common stock on Nasdaq for each quarter over the past two years.

MGE

As of February 1, 2011, there were 17,347,894 outstanding shares of common stock, all of which were held by MGE Energy. There is no market for shares of common stock of MGE.

Dividends

MGE Energy

The following table sets forth MGE Energy's quarterly cash dividends per share declared during 2010 and 2009:

	(Per share)		2010		2009
	Fourth quarter	$	0.375	$	0.368
	Third quarter	$	0.375	$	0.368
	Second quarter	$	0.368	$	0.362
	First quarter	$	0.368	$	0.362

MGE

The following table sets forth MGE's quarterly cash dividends declared during 2010 and 2009:

	(In thousands)		2010		2009
	Fourth quarter	$	6,596	$	6,478
	Third quarter	$	6,596	$	6,478
	Second quarter	$	6,478	$	6,361
	First quarter	$	6,478	$	-

See discussion below as well as the "Liquidity and Capital Resources - Financing Activities" under Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations, for a description of restrictions applicable to dividend payments by MGE.

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Dividend Restrictions

Dividend payments by MGE to MGE Energy are subject to restrictions arising under a PSCW rate order and, to a lesser degree, MGE's first mortgage bonds. The PSCW order limits the amount of dividends that MGE may pay MGE Energy when its common equity ratio, calculated in the manner used in the rate proceeding, is less than 55%. Under those circumstances, MGE may not pay annual dividends in excess of $28.8 million plus dividends on shares issued in excess of the issued share number used in the rate proceeding forecast if the proceeds are invested in MGE. MGE's thirteen month rolling average common equity ratio at December 31, 2010, is estimated to be 58.5% as determined under the calculation used in the rate proceeding. MGE paid cash dividends of $26.2 million to MGE Energy in 2010.The rate proceeding calculation includes as indebtedness imputed amounts for MGE's outstanding purchase power capacity payments and other PSCW adjustments, but does not include the indebtedness associated with MGE Power West Campus and MGE Power Elm Road, which are consolidated into MGE's financial Statements.

MGE has covenanted with the holders of its first mortgage bonds not to declare or pay any dividend or make any other distribution on or purchase any shares of its common stock unless, after giving effect thereto, the aggregate amount of all such dividends and distributions and all amounts applied to such purchases, after December 31, 1945, shall not exceed the earned surplus (retained earnings) accumulated subsequent to December 31, 1945. As of December 31, 2010, approximately $248.6 million was available for the payment of dividends under this covenant.

Issuer Purchases of Equity Securities

MGE Energy

* Under the Stock Plan, common stock shares deliverable to plan participants may be either newly issued shares or shares purchased on the open market, as determined from time to time by MGE Energy. In June 2009, MGE Energy switched to using open market purchases to provide shares to meet obligations to participants in the Stock Plan. The shares are purchased on the open market through a securities broker-dealer and then are reissued under the Stock Plan as needed to meet share delivery requirements. The volume and timing of share repurchases in the open market depends upon the level of dividend reinvestment and optional share purchases being made from time to time by plan participants. As a result, there is no specified maximum number of shares to be repurchased and no specified termination date for the repurchases. All shares issued through the Stock Plan, whether newly issued or reissued following open market purchases, are issued and sold pursuant to a registration statement that was filed with the SEC and is currently effective.

MGE

None.

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Stock Performance Graph

The performance graph below illustrates a five-year comparison of cumulative total returns based on an initial investment of $100 in MGE Energy common stock, as compared with the Russell 2000 and the EEI Index for the period 2006 through 2010.

This performance chart assumes:

·

$100 invested on December 31, 2005, in MGE Energy common stock, in the Russell 2000 and the EEI Index; and

·

All dividends are reinvested.

Value of Investment at December 31,

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Item 6. Selected Financial Data.

MGE Energy

(In thousands, except per-share amounts)

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Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

General

MGE Energy is an investor-owned public utility holding company operating through subsidiaries in five business segments:

·

Electric utility operations, conducted through MGE,

·

Gas utility operations, conducted through MGE,

·

Nonregulated energy operations, conducted through MGE Power and its subsidiaries,

·

Transmission investments, representing our equity investment in ATC, and

·

All other, which includes corporate operations and services as well as certain construction services.

Our principal subsidiary is MGE, which generates and distributes electric energy, distributes natural gas, and represents a majority portion of our assets, liabilities, revenues, and expenses. MGE generates and distributes electricity to approximately 139,000 customers in Dane County, Wisconsin, including the city of Madison, and purchases and distributes natural gas to approximately 143,000 customers in the Wisconsin counties of Columbia, Crawford, Dane, Iowa, Juneau, Monroe, and Vernon.

Our nonregulated energy operations own interests in new electric generating capacity that is leased to MGE. The ownership/leasing structure was adopted under applicable state regulatory guidelines for MGE's participation in these generation facilities, consisting principally of a stable return on the equity investment in the new generation facilities over the term of the related leases. The nonregulated energy operations include partial ownership of a cogeneration project on the UW-Madison campus and an undivided 8.33% ownership interest in two 615 MW coal-fired generating units in Oak Creek, Wisconsin, one of which entered commercial operation on February 2, 2010 and the other of which entered commercial operation on January 12, 2011. MGE operates the cogeneration project, and a third party operates the units in Oak Creek. Due to the nature of MGE's participation in these facilities, the results of our nonregulated operations are also consolidated into MGE's consolidated financial position and results of operations under applicable accounting standards.

Executive Overview

Our primary focus today and for the foreseeable future is our core utility customers at MGE as well as creating long-term value for shareholders. MGE continues to face the challenge of providing its customers with reliable power at competitive prices. MGE plans to meet this challenge by investing in more efficient generation projects, including renewable energy sources. In the future, MGE will continue to focus on growing earnings while controlling operating and fuel costs. MGE will continue to maintain safe and efficient operations in addition to providing customer value. We believe it is critical to maintain a strong credit standing consistent with financial strength in MGE as well as the parent company in order to accomplish these goals.

We earn our revenue and generate cash from operations by providing electric and natural gas utility services, including electric power generation and electric power and gas distribution. The earnings and cash flows from the utility business are sensitive to various external factors, including:

·

Weather, and its impact on customer sales of electricity and gas,

·

Economic conditions, including current business activity and employment and their impact on customer demand,

·

Regulation and regulatory issues,

·

Energy commodity prices,

·

Equity price risk pertaining to pension related assets,

·

Credit market conditions, including interest rates and our debt credit rating,

·

Environmental laws and regulations, including pending environmental rule changes,

and other factors listed in "Item 1A. Risk Factors."

For the year ended December 31, 2010, MGE Energy's earnings were $57.7 million or $2.50 per share compared to $51.0 million or $2.21 per share for the same period in the prior year. MGE's earnings for the year ended December 31, 2010, were $37.7 million compared to $35.9 million for the same period in the prior year.

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MGE Energy's income was derived from our business segments as follows:

Our net income during 2010 compared to 2009 primarily reflects the effects of the following factors:

·

A 10.0% increase in retail electric revenues reflecting increased customer demand primarily as a result of warmer-than-normal summer weather, particularly when compared to the cooler-than-normal weather of the prior period. Cooling degree days (a measure for determining the impact of weather during the cooling season) increased by 125% compared to the prior period.

·

An 8.2% decrease in gas sales reflecting lower customer demand due to a milder winter. Heating degree days (a measure for determining the impact of weather during the heating season) decreased by 8% compared to the prior period. In addition, the 2009 results reflect the receipt by the gas utility of the benefit of $1.9 million (pretax) from capacity release revenues and commodity savings as a result of GCIM.

·

The electric and gas utilities received a one-time $2.6 million (pretax) gain on a sale of property to ATC during March 2010.

·

Higher nonregulated energy revenues are attributable to Elm Road Unit 1 entering commercial operation in February 2010.

Our net income during 2009 compared to 2008 primarily reflects the effects of the following factors:

·

A 3.9% decrease in electric revenue, reflecting lower customer demand primarily as a result of cooler-than-normal summer weather. According to the National Weather Service, July 2009 was the coolest on record in Madison, where MGE's primary service territory resides. Cooling degree days (a measure for determining the impact of weather during the cooling season) for 2009 decreased by 32% compared to 2008. Reduced economic activity also contributed to the reduced demand for service.

·

Retail gas sales were relatively flat compared to the prior year. In 2008, the gas utility had expensed a $1.3 million settlement (excludes premium) associated with a weather hedge (heating degree collar) as a result of colder-than-normal weather. The gas utility had no weather hedges during 2009.

·

Higher nonregulated energy revenues primarily attributable to higher carrying costs being recognized for the Elm Road Units. Carrying costs during construction of the nonregulated energy projects, related to the equity portion, are recognized over the period of time the costs are recovered in rates.

·

A $0.6 million increase in earnings from our interest in ATC.

·

A decline in the All Other segment is primarily attributable to gains on sales of investments recognized in the year ended December 31, 2008.

During 2010, the following events occurred:

Elm Road Units: Elm Road Unit 1 entered commercial operation on February 2, 2010. On February 4, 2010, our subsidiary, MGE Power Elm Road, which owns an ownership interest in those Units, issued $50 million of its 5.04% senior secured notes to refinance a portion of the costs of those Units. The proceeds of those notes were used to repay borrowings under MGE Energy's credit facilities.

ATC: MGE Transco contributed $0.7 million for voluntary capital contributions to ATC for the year ended December 31, 2010.

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Smart Grid Investment Grant: MGE has been approved by the U.S. Department of Energy (DOE) under the federal stimulus program for a $5.5 million grant for smart grid projects. The DOE grant requires MGE to match the grant funding, bringing the total cost of the proposed projects to more than $11 million. The proposed projects will install technologies to boost efficiency, enhance service and improve reliability for customers. The stimulus grant will help fund the following projects: advanced metering infrastructure, plug-in hybrid electric vehicles support, and distribution management. As of December 31, 2010, MGE has spent $2.5 million related to these projects.

During 2011, several items may affect us, including:

2011 Rate Filing: In January 2011, the PSCW authorized MGE to increase 2011 rates for retail electric customers by 2.3% and increase rates for gas customers by 1.0%. The increase in retail electric rates was primarily driven by costs for MGE's share of the Elm Road Units.

General economic conditions: Economic conditions both inside and outside our service area are expected to continue to affect the level of demand for our utility services and may affect the collection of our accounts receivable and the creditworthiness of counterparties with whom we do business. We have in place lines of credit aggregating $115 million for MGE Energy (including MGE) and $75 million for MGE to address our liquidity needs.

 

Elm Road Unit: Elm Road Unit 2 entered commercial operation on January 12, 2011.

Environmental Initiatives: There are proposed legislation, rules and initiatives involving matters related to air emissions, water effluent, hazardous materials and greenhouse gases, all of which affect generation plant capital expenditures and operating costs as well as future operational planning. Such legislation and rulemaking could significantly affect the costs of owning and operating fossil-fueled generating plants, such as Columbia and Elm Road Unit 1, from which we derive approximately 34% of our electric generating capacity. We would expect to seek and receive recovery of any such costs in rates; however, it is difficult to estimate the amount of such costs due to the uncertainty as to the timing and form of the legislation and rules, and the scope and time of the recovery of costs in rates. In addition, MGE is involved in claims surrounding the alleged failure, among other things, to obtain necessary air permits and implement necessary emission controls associated with activities previously undertaken at Columbia. MGE and the other co-owners are defending against these claims. MGE is currently unable to predict the impact of these claims on its financial condition or results of operations at this time. However, should there ultimately be an adverse outcome, MGE believes it could have a significant effect.

The following discussion is based on the business segments as discussed in Footnote 23.

Results of Operations

Year Ended December 31, 2010, Versus the Year Ended December 31, 2009

Electric Utility Operations - MGE Energy and MGE

Electric sales and revenues

The following table compares MGE's electric revenues and electric kWh sales by customer class for each of the periods indicated:

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Electric operating revenues increased $28.4 million or 8.5% for the year ended December 31, 2010, due to the following:

	(In millions)
	Volume	$	14.6
	Rate changes		13.4
	Fuel refund (2009)		5.5
	Adjustments to revenues		0.3
	Other revenues		(5.4)
	Total	$	28.4

·

Volume. During the year ended December 31, 2010, there was a 4.1% increase in total retail sales volumes compared to the same period in the prior year, reflecting the warmer-than-normal weather experienced in the current period compared to the cooler-than-normal weather experienced in the prior period.

·

Rates changes. Rates charged to retail customers for the year ended December 31, 2010, were 3.9% or $13.4 million higher than those charged during the same period in the prior year.

In December 2009, the PSCW authorized MGE to increase 2010 rates for retail electric customers by 3.3% or $11.9 million. The increase in retail electric rates is driven by costs for MGE's share of the Elm Road Units and transmission reliability enhancements.

In May 2009, MGE implemented a credit of $0.00204 per kWh, due to a decrease in actual electric fuel costs. During the year ended December 31, 2009, $4.1 million had been credited to electric customers.

·

Fuel refund. As a result of lower than expected fuel and purchased power costs in 2008, a fuel refund was approved. The PSCW issued a final order approving the refund amount of $5.5 million, which was applied to customers' accounts in March 2009. This refund reduced revenues for the year ended December 31, 2009, but was offset in other revenues as described below.

·

Sales to the market. Sales to the market represent wholesale sales made to third parties who are not ultimate users of the electricity. These sales may include spot market transactions on the markets operated by MISO or PJM. These sales may also include bilateral sales to other utilities or power marketers. Generating units are dispatched by MISO based on cost considerations as well as reliability of the system. Sales to the market typically occur when MGE has more generation and purchases online than is needed for its own system demand. The excess electricity is then sold to others in the market. For the year ended December 31, 2010, market volumes increased due to more internal generation available for sale to the market compared to the prior year, reflecting increased opportunities for sales.

·

Other revenues. Other electric revenues decreased $5.4 million for the year ended December 31, 2010, compared to the same period in the prior year. This is primarily a result of MGE recording $5.5 million in other electric revenues during the year ended December 31, 2009, to offset the impact of the 2008 fuel refund returned to customers in 2009.

·

Adjustments to revenues. Included in rates for 2010 is a full year of lease payments associated with Elm Road Unit 1 and four months of lease payments associated with Elm Road Unit 2. However, the lease payments for Elm Road Unit 1 did not begin until February 2010 when the unit went into service and no lease payments were made for Elm Road Unit 2, since the unit was not in service until January 12, 2011. As a result, $3.6 million was included in adjustments to revenues to defer and return to customers the lease payments collected in rates.

The adjustments to revenues amount also includes the elimination of carrying costs for WCCF and the Elm Road Units that were collected in electric rates, which are recognized as nonregulated energy operating revenues in our Nonregulated Energy Operations segment. The amount eliminated was $7.0 million and $10.7 million for the years ended December 31, 2010 and 2009, respectively.

Electric fuel and purchased power

The expense for fuel for electric generation increased $5.1 million or 13.7% during the year ended December 31, 2010, compared to the same period in the prior year, reflecting higher generation at Elm Road and Columbia. Elm Road Unit 1 entered commercial operation on February 2, 2010.

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Purchased power expense decreased by $13.9 million or 16.3% during the year ended December 31, 2010, compared to the same period in the prior year. This decrease in expense reflects a $12.4 million or 14.8% decrease in the volume of power purchased from third parties and a $1.5 million or 1.8% decrease in the per-unit cost of purchased power, driven by Elm Road Unit 1 becoming operational in February 2010 and increased production at Columbia.

Electric operating and maintenance expenses

Electric operating and maintenance expenses increased $15.9 million during the year ended December 31, 2010, compared to the same period in 2009. The following changes contributed to the net change:

	(In millions)
	Increased administrative and general costs	$	6.2
	Increased transmission costs		4.9
	Increased production costs		3.4
	Increased distribution costs		1.4
	Total	$	15.9

For the year ended December 31, 2010, increased administrative and general costs were primarily due to increased pension costs and the amortization of deferred pension expenses from 2009. These pension costs were deferred and recovery in rates began in 2010. Transmission costs increased primarily due to an increase in network service fees pertaining to ATC. Production costs increased due to Elm Road Unit 1 becoming operational in February 2010. Distribution costs increased mainly as a result of increased overhead and underground line expenses.

Electric depreciation expense

Electric depreciation expense decreased $1.3 million for the year ended December 31, 2010, compared to the same period in the prior year. This decrease was a result of new depreciation rates becoming effective for 2010.

Gas Utility Operations - MGE Energy and MGE

Gas deliveries and revenues

The following table compares MGE's gas revenues and gas therms delivered by customer class during each of the periods indicated:

Gas revenues decreased $26.4 million or 13.7% for the year ended December 31, 2010. These changes are related to the following factors:

	(In millions)
	Gas deliveries	$	(15.8)
	Gas costs/rates		(8.3)
	Transportation and other effects		(2.3)
	Total	$	(26.4)

·

Retail gas deliveries. For the year ended December 31, 2010, retail gas deliveries decreased 8.8% compared to the same period in 2009 as a result of milder weather during the winter months.

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·

Gas costs/rates. The average retail rate per therm for the year ended December 31, 2010, decreased 4.5% compared to the same period in 2009. The primary contributor to this decrease is significantly lower natural gas commodity costs. In December 2009, the PSCW authorized MGE to decrease gas rates 0.74% or $1.5 million.

·

Transportation and other revenues. Transportation and other revenues decreased a total of $2.3 million primarily due to a decrease in income realized under the GCIM.

Under MGE's GCIM which ended in 2010, if actual gas commodity savings and capacity release revenues are above or below a benchmark set by the PSCW, then MGE's gas sales service customers and shareholders share in any increased costs or savings per percentages set by the PSCW. For the year ended December 31, 2009, shareholders received a benefit from capacity release revenues and commodity savings under GCIM of $1.9 million.

Cost of gas sold

For the year ended December 31, 2010, cost of gas sold decreased by $19.3 million, compared to the same period in the prior year. The volume of gas purchased decreased 7.9% which resulted in $9.7 million of reduced expense. In addition, an 8.4% decrease in the cost per therm of natural gas resulted in $9.6 million of reduced expense.

Gas operating and maintenance expenses

Gas operating and maintenance expenses increased $2.8 million for the year ended December 31, 2010, compared to the same period a year ago. The following changes contributed to the net change.

	(In millions)
	Increased administrative and general costs	$	3.9
	Decreased production costs		(0.2)
	Decreased distribution costs		(0.2)
	Decreased customer accounts costs		(0.3)
	Decreased customer service costs		(0.4)
	Total	$	2.8

For the year ended December 31, 2010, increased administrative and general costs were primarily due to increased pension costs and the amortization of deferred pension expenses from 2009. The incremental pension costs were deferred in 2009 and rate recovery of these costs began in 2010.

Gas depreciation expense

Gas depreciation expense decreased $4.3 million for the year ended December 31, 2010, compared to the same period in the prior year. This decrease was a result of new depreciation rates becoming effective for 2010.

Other Income (deductions), Net

For the year ended December 31, 2010, other income, net for the electric and gas segments increased by $3.2 million, compared to the same period in the prior year. This increase is primarily due to a one-time $2.6 million pretax gain on a sale of property to ATC during March 2010 and a one-time $0.5 million pretax gain on a sale of property during September 2010.

Nonregulated Energy Operations - MGE Energy and MGE

Nonregulated energy operating revenues

Operating revenues from nonregulated energy operations increased $10.3 million for the year ended December 31, 2010, when compared to the same period in the prior year, reflecting the commencement of commercial operations at Elm Road Unit 1 in February 2010.

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MGE also received approval from the PSCW to collect carrying costs expected to be incurred by MGE Power Elm Road during construction of the Elm Road Units. MGE estimates that the total carrying costs on the Elm Road Units will be approximately $62.6 million. A portion of this amount is being recognized over the period recovered in rates and a portion is being deferred and will be recognized over the period in which the Units are depreciated. See Footnote 21 for additional information regarding these carrying charges. For the years ended December 31, 2010 and 2009, MGE Power Elm Road recognized $4.8 million and $8.1 million, respectively, related to carrying costs on the Elm Road Units.

Nonregulated depreciation expense

Nonregulated depreciation expense increased $2.5 million for the year ended December 31, 2010, compared to the same period in the prior year. This additional depreciation is related to the commencement of commercial operations at Elm Road Unit 1 in February 2010.

Nonregulated energy interest expense, net

For the years ended December 31, 2010 and 2009, interest expense, net at the nonregulated energy operations segment was $2.7 million. Interest expense at the nonregulated energy segment for both the years ended December 31, 2010 and 2009, includes interest expense incurred on $50 million of borrowings at MGE Power West Campus, which were long-term and fixed-rate during both periods, and $50 million of borrowings at MGE Power Elm Road, which were long-term and fixed-rate during 2010.

Included in the nonregulated interest expense is interdepartmental interest expense and capitalized interest at MGE Power Elm Road. During the years ended December 31, 2010 and 2009, MGE Power Elm Road was charged $0.3 million and $3.4 million, respectively, in interest expense by Corporate on funds borrowed for the Elm Road Units. This expense is eliminated upon consolidation for MGE Energy only. The interest expense at MGE Power Elm Road is offset in capitalized interest.

During the year ended December 31, 2009, MGE Power Elm Road recorded $0.1 million in net interest income on cash advanced to ERS for construction of transmission equipment and work done by ATC related to the Elm Road Units. No interest income on cash advanced to ERS was recorded during the year ended December 31, 2010.

Transmission Investment Operations - MGE Energy and MGE

Transmission investment other income

For the years ended December 31, 2010 and 2009, other income at the transmission investment segment was $8.5 million and $8.2 million, respectively. The transmission investment segment holds our interest in ATC, and its income reflects our equity in the earnings of ATC. See Footnote 4.b for additional information concerning ATC and summarized financial information regarding ATC.

All Other Nonregulated Operations - MGE Energy

All other interest income, net

All other interest income, net for the years ended December 31, 2010 and 2009, was less than $0.1 million and $2.8 million, respectively. Interest income for the year ended December 31, 2010, represents $0.3 million in interdepartmental interest income from MGE Power Elm Road, offset by $0.3 million in interest expense on short-term debt. Interest income for the year ended December 31, 2009, represents $3.4 million in interdepartmental interest income from MGE Power Elm Road, partially offset by $0.6 million in interest expense on short-term debt.

Consolidated Other General Taxes

MGE Energy's and MGE's other general taxes decreased $0.8 million or 4.5% for the year ended December 31, 2010, when compared to the same period in 2009, due to decreased Wisconsin license fee tax. The annual license fee tax expense is based on the prior year's adjusted operating revenues. Tax rates have not changed.

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Consolidated Income Taxes – MGE Energy and MGE

MGE Energy's effective income tax rate for the year ended December 31, 2010, is 37.0% compared to 35.6% for the same period in 2009, and MGE's effective income tax rate for the year ended December 31, 2010, is 37.0% compared to 35.4% for the same period in 2009. The effective income tax rate differences for both MGE Energy and MGE are primarily due to a decrease in the federal wind energy credit. The 10-year tax credit attributable to the Kewaunee wind farm lapsed during 2009.

For 2009 tax return purposes, MGE Energy and MGE changed its income tax methods of accounting for electric repairs. The effect on the 2010 financial statements of the finalization pertaining to the electric repairs adjustment is an increase to deferred tax expense and a corresponding decrease in the current tax provision in the amount of approximately $6.0 million.

The tax method change did not have an impact on income before income tax expense in the income statements of MGE Energy and MGE.

Noncontrolling Interest, Net of Tax - MGE

The noncontrolling interest, net of tax, reflects the accounting required for MGE Energy's interest in the WCCF and Elm Road Units. MGE Energy owns 100% of MGE Power West Campus and MGE Power Elm Road; however, due to the contractual agreements for these projects with MGE, the entities are considered VIEs and their results are consolidated with those of MGE, the primary beneficiary of the VIEs. Also included in noncontrolling interest, net of tax, is MGE Energy's interest in MGE Transco.

For the year ended December 31, 2010, MGE Energy (through its wholly owned subsidiary MGE Power) earned $7.7 million and $11.3 million, net of tax, for its interest in MGE Power West Campus and MGE Power Elm Road, respectively. Additionally, MGE Energy earned $1.8 million, net of tax, for its interest in MGE Transco for the year ended December 31, 2010. These amounts are recorded as noncontrolling interest expense, net of tax, on MGE's consolidated statement of income.

For the year ended December 31, 2009, MGE Energy (through its wholly owned subsidiary MGE Power) had earned $7.6 million and $4.9 million, net of tax, for its interest in MGE Power West Campus and MGE Power Elm Road, respectively. Additionally, MGE Energy had earned $1.5 million, net of tax, for its interest in MGE Transco for the year ended December 31, 2009. These amounts are recorded as noncontrolling interest expense, net of tax, on MGE's consolidated statement of income.

Year Ended December 31, 2009, Versus the Year Ended December 31, 2008

Electric sales and revenues

The following table compares MGE's electric revenues and electric kWh sales by customer class for each of the periods indicated:

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Electric operating revenues decreased $13.6 million or 3.9% for the year ended December 31, 2009, due to the following:

	(In millions)
	Volume	$	(13.8)
	Rate changes		(7.6)
	Sales to the market		(3.2)
	Other revenues		11.0
	Total	$	(13.6)

·

Volume. During the year ended December 31, 2009, there was a 4% decrease in total retail sales volumes when compared to the same period in the prior year, as a result of cooler-than-normal weather. The demand for electricity is affected by weather conditions. According to the National Weather Service, July 2009 was the coolest on record in Madison, where MGE's primary service territory resides. Cooling degree days for 2009 decreased by 32% compared to 2008. Reduced economic activity also contributed to the reduced demand for service.

·

Rates changes. Rates charged to retail customers for the year ended December 31, 2009, were 2.1% or $7.6 million lower than those charged during the same period in the prior year.

On December 18, 2008, under a limited reopener, the PSCW authorized MGE to decrease 2009 rates for retail electric customers by 0.74% or $2.7 million from 2008. The decrease in retail electric rates is driven by a decrease in fuel and purchased power costs, a decrease in costs associated with the Elm Road Units and a decrease in ATC transmission costs. The PSCW also approved deferred accounting for incremental pension and other postretirement benefit costs above the levels currently included in rates.

As a result of lower than expected fuel and purchased power costs in 2008, a fuel refund was approved by the PSCW. In March 2009, the PSCW completed their audit of 2008 electric fuel costs and issued a final order approving the amount to be refunded to customers. A refund of $5.7 million (includes interest) was applied to customers' accounts in March 2009. See "Other revenues" discussion below for more information on this refund.

In May 2009, the PSCW approved an interim order authorizing MGE to implement a credit of $0.00204 per kWh, due to a decrease in actual electric fuel costs, when compared to those fuel costs projected in MGE's most recent rate order. During the year ended December 31, 2009, $4.1 million had been credited to electric customers. See "Other revenues" discussion below for more information on this interim order.

In 2008, the PSCW approved a $0.00239 per kWh interim fuel surcharge subject to refund, with interest, on MGE's electric rates to cover increased fuel and purchased power expenses. For the year ended December 31, 2008, this interim surcharge resulted in a $5.1 million increase to electric rates. See "Other revenues" below for additional information on this interim fuel surcharge.

·

Sales to the market. Sales to the market represent wholesale sales made to third parties who are not ultimate users of the electricity. These sales may include spot market transactions on the markets operated by MISO or PJM. These sales may also include bilateral sales to other utilities or power marketers. Generating units are dispatched by MISO based on cost considerations as well as reliability of the system. Sales to the market typically occur when MGE has more generation and purchases online than is needed for its own system demand. The excess electricity is then sold to others in the market. For the year ended December 31, 2009, sales to the market decreased $3.2 million when compared to the same period in the prior year, reflecting decreased opportunities for sales.

·

Other revenues. Other electric revenues increased $11.0 million for the year ended December 31, 2009, compared to the same period in the prior year.

As a result of the refund provision in the May 2008 interim fuel surcharge order, MGE recognized an estimated refund to customers totaling $5.5 million during the year ended December 31, 2008, and reflected this reduction in other electric revenues. During the year ended December 31, 2009, MGE recorded $5.5 million in other electric revenues to offset the impact of the 2008 fuel refund.

Also included in other revenues for the year ended December 31, 2009, is a $0.3 million projected refund which was accrued related to the May 2009 interim order.

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Other electric revenues reflect the elimination of carrying costs for WCCF and the Elm Road Units that were collected in electric rates, which are recognized as nonregulated energy operating revenues in our Nonregulated Energy Operations segment. The amount eliminated was $10.7 million and $11.0 million for the years ended December 31, 2009 and 2008, respectively.

Electric fuel and purchased power

As a result of more favorable prices for purchased power as compared to internal generation, power purchases were increased, and internal generation reduced, causing fuel for electric generation to decrease and purchased power expense to increase.

The expense for fuel for electric generation decreased $17.9 million or 32.6% during the year ended December 31, 2009, compared to the same period in the prior year. This decrease in expense reflects a $12.8 million decrease related to the lower electric generation and a $5.1 million decrease related to fuel cost.

Purchased power expense increased by $10.4 million or 14.0% during the year ended December 31, 2009, compared to the same period in the prior year. This increase in expense reflects an $18.2 million or 27.3% increase in the volume of power purchased offset by a $7.8 million or 10.5% decrease in the per-unit cost of purchased power.

Electric operating and maintenance expenses

Electric operating and maintenance expenses decreased $4.6 million during the year ended December 31, 2009, compared to the same period in 2008. The following changes contributed to the net change:

	(In millions)
	Decreased production costs	$	(2.8)
	Decreased maintenance expenses		(2.2)
	Decreased customer accounts costs		(0.6)
	Decreased distribution costs		(0.3)
	Decreased general and administrative costs		(0.2)
	Increased transmission costs		1.5
	Total	$	(4.6)

For the year ended December 31, 2009, production costs and maintenance costs decreased due to lower internal generation, compared to the same period in the prior year. In addition, customer accounts costs decreased due to lower uncollectible accounts expense. Transmission costs increased primarily due to network service fees pertaining to ATC.

Electric depreciation expense

Electric depreciation expense increased $1.4 million for the year ended December 31, 2009, compared to the same period in the prior year as a result of additional electric plant assets.

Gas Utility Operations - MGE Energy and MGE

Gas deliveries and revenues

The following table compares MGE's gas revenues and gas therms delivered by customer class during each of the periods indicated:

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Gas revenues decreased $50.3 million or 20.7% for the year ended December 31, 2009. These changes are related to the following factors:

	(In millions)
	Gas costs/rates	$	(49.3)
	Transportation and other effects		(0.7)
	Gas deliveries		(0.3)
	Total	$	(50.3)

·

Gas costs/rates. The average retail rate per therm for the year ended December 31, 2009, decreased 20.9% compared to the same period in 2008. The primary contributor to this decrease is significantly lower natural gas costs.

·

Transportation and other revenues. Transportation and other revenues decreased a total of $0.7 million primarily due to a decrease in income realized under the GCIM.

Under MGE's GCIM, if actual gas commodity savings and capacity release revenues are above or below a benchmark set by the PSCW, then MGE's gas sales service customers and shareholders share in any increased costs or savings per percentages set by the PSCW. For the year ended December 31, 2009 and 2008, shareholders received the benefit of $1.9 million and $2.4 million, respectively, from capacity release revenues and commodity savings under the GCIM.

Cost of gas sold

For the year ended December 31, 2009, cost of gas sold decreased by $48.5 million, compared to the same period in the prior year. The cost per therm of natural gas decreased 27.6%, which resulted in $46.9 million of reduced expense. In addition, a 0.9% decrease in the volume of gas purchased resulted in $1.6 million less expense.

Gas operating and maintenance expenses

Gas operating and maintenance expenses decreased $1.7 million for the year ended December 31, 2009, compared to the same period a year ago. The following changes contributed to the net change.

	(In millions)
	Decreased customer accounts costs	$	(0.7)
	Decreased distribution costs		(0.3)
	Decreased maintenance costs		(0.3)
	Decreased general and administrative costs		(0.2)
	Decreased production costs		(0.1)
	Decreased customer service costs		(0.1)
	Total	$	(1.7)

Customer accounts costs decreased due to lower uncollectible accounts expense.

Gas depreciation expense

Gas depreciation expense increased $0.4 million for the year ended December 31, 2009, compared to the same period in the prior year as a result of additional gas plant assets.

Other Income (deductions), Net

Other income, net for the gas and electric segments increased $1.6 million for the year ended December 31, 2009, compared to the same period in the prior year. In 2008, the gas utility had expensed a $1.5 million settlement (includes premium) associated with a weather hedge (heating degree collar) as a result of colder-than-normal weather. The gas utility had no weather hedges during 2009. In addition, charitable contributions decreased by $1.5 million for the year ended December 31, 2009, compared to the prior year. Offsetting this change is a $0.8 million pretax gain on investments recognized in 2008 and a $0.4 million reduction in AFUDC-equity for the year ended December 31, 2009, compared to the prior year.

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Nonregulated Energy Operations - MGE Energy and MGE

Nonregulated energy operating revenues

Operating revenues from nonregulated energy operations increased $1.7 million for the year ended December 31, 2009, when compared to the same period in the prior year. Operating revenues from nonregulated energy operations for both the year ended December 31, 2009 and 2008, include $14.9 million in interdepartmental revenues related to a leasing arrangement between MGE and MGE Power West Campus. Upon consolidation, these interdepartmental revenues are eliminated.

MGE also received approval from the PSCW to collect carrying costs expected to be incurred by MGE Power Elm Road during construction of the Elm Road Units. MGE estimates that the total carrying costs on the Elm Road Units will be approximately $59.5 million. A portion of this amount is being recognized over the period recovered in rates and a portion is being deferred and will be recognized over the period in which the Units are depreciated. See Footnote 21 for additional information regarding these carrying charges. For the year ended December 31, 2009 and 2008, MGE Power Elm Road recognized $8.1 million and $6.4 million, respectively, related to carrying costs on the Elm Road Units.

Nonregulated energy interest expense, net

For the year ended December 31, 2009 and 2008, interest expense, net at the nonregulated energy operations segment was $2.7 million and $2.6 million, respectively. Interest expense at the nonregulated energy segment for both the year ended December 31, 2009 and 2008, includes $2.8 million in interest expense incurred on $50 million of long-term, fixed-rate borrowings at MGE Power West Campus.

Also included in the nonregulated interest expense is interdepartmental interest expense and capitalized interest at MGE Power Elm Road. During the year ended December 31, 2009 and 2008, MGE Power Elm Road was charged $3.4 million and $4.8 million, respectively, in interest expense by Corporate on funds borrowed for the Elm Road Units. This expense is eliminated upon consolidation for MGE Energy only. The interest expense at MGE Power Elm Road is offset by $3.4 million and $4.8 million, respectively, in capitalized interest.

During the year ended December 31, 2009 and 2008, MGE Power Elm Road recorded $0.1 million in interest income on cash advanced to ERS for construction of transmission equipment and work done by ATC related to the Elm Road Units.

Transmission Investment Operations - MGE Energy and MGE

Transmission investment other income

For the year ended December 31, 2009 and 2008, other income at the transmission investment segment was $8.2 million and $7.2 million, respectively. The transmission investment segment holds our interest in ATC, and its income reflects our equity in the earnings of ATC. See Footnote 4.b for additional information concerning ATC and summarized financial information regarding ATC.

All Other Nonregulated Operations - MGE Energy

All other - other income

Other income in the all other segment decreased $2.4 million for the year ended December 31, 2009, compared to the same period in the prior year primarily due to a $2.5 million pretax gain on investments recognized in the prior year.

All other interest income, net

All other interest income, net for the year ended December 31, 2009 and 2008, was $2.8 million. Interest income for the year ended December 31, 2009, represents $3.4 million in interdepartmental interest income from MGE Power Elm Road, partially offset by $0.6 million in interest expense on short-term debt. Interest income for the year ended December 31, 2008, represents $4.8 million in interdepartmental interest income from MGE Power Elm Road, partially offset by $2.0 million in interest expense on short-term debt. The interdepartmental interest income is eliminated upon consolidation.

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Consolidated Other General Taxes

MGE Energy's and MGE's other general taxes increased $1.1 million or 6.3% for the year ended December 31, 2009, when compared to the same period in 2008, due to increased Wisconsin license fee tax. The annual license fee tax expense is based on the prior year's adjusted operating revenues. Tax rates have not increased.

Consolidated Income Taxes

MGE Energy's effective income tax rate for the year ended December 31, 2009, is 35.6% compared to 35.5% for the same period in 2008. MGE's effective income tax rate for the year ended December 31, 2009, is 35.4% compared to 35.2% for the same period in the prior year. The effective income tax rate differences for both MGE Energy and MGE for 2009 compared to 2008 are insignificant, as the effective income tax rate components are substantially equivalent.

Under 2009 Wisconsin Act 2, effective for years beginning on or after January 1, 2009, Wisconsin requires corporations to use combined reporting to compute their Wisconsin income for income tax purposes. Formerly, Wisconsin law required each corporation in a combined group to file separate returns. The combined reporting statute in Wisconsin did not have a significant impact on the effective income tax rates of MGE Energy and MGE.

For 2009 tax return purposes, MGE Energy and MGE changed its income tax methods of accounting for repairs based on current Treasury Regulations and case law. The change in income tax methods of accounting involves, among other things, identification of appropriate units of property for repair work and computation of a cumulative one-time tax deduction able to be claimed in 2009. The effect on the 2009 financial statements of the cumulative adjustment is an increase to deferred tax expense and a corresponding decrease in the current tax provision in the amount of about $9.2 million. The tax method change did not have an impact on income before income tax expense in the income statements of MGE Energy and MGE.

Noncontrolling Interest, Net of Tax

The noncontrolling interest, net of tax, reflects the accounting required for MGE Energy's interest in the WCCF and Elm Road Units. MGE Energy owns 100% of MGE Power West Campus and MGE Power Elm Road; however, due to the contractual agreements for these projects with MGE, the entities are considered VIEs and their results are consolidated with those of MGE, the primary beneficiary of the VIEs. Also included in noncontrolling interest, net of tax, is MGE Energy's interest in MGE Transco.

For the year ended December 31, 2009, MGE Energy (through its wholly owned subsidiary MGE Power) earned $7.6 million and $4.9 million, net of tax, for its interest in MGE Power West Campus and MGE Power Elm Road, respectively. Additionally, MGE Energy earned $1.5 million, net of tax, for its interest in MGE Transco. These amounts are recorded as noncontrolling interest expense, net of tax, on MGE's consolidated statement of income.

For the year ended December 31, 2008, MGE Energy (through its wholly owned subsidiary MGE Power) had earned $7.6 million and $3.9 million, net of tax, for its interest in MGE Power West Campus and MGE Power Elm Road, respectively. Additionally, MGE Energy had earned $0.8 million, net of tax, for its interest in MGE Transco. These amounts are recorded as noncontrolling interest expense, net of tax, on MGE's consolidated statement of income.

Liquidity and Capital Resources

Cash Flows

The following summarizes cash flows for MGE Energy and MGE during the year ended 2010, 2009, and 2008: