FORM 10-K
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934

Midwest Generation, LLC
(Exact name of registrant as specified in its charter)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES o NO ý

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES o NO ý

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. YES ý NO o

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 registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K ý.

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

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). YES o NO ý

Aggregate market value of the registrant's Membership Interests held by non-affiliates of the registrant as of June 30, 2008: $0. Number of units outstanding of the registrant's Membership Interests as of March 2, 2009: 100 units (all units held by an affiliate of the registrant).

The registrant meets the conditions set forth in General Instruction I.(1)(a) and (b) of Form 10-K and is therefore filing this Form 10-K under the reduced disclosure format.



	Glossary	ii
	Forward-Looking Statements	1
PART I
Item 1.	Business	3
Item 1A.	Risk Factors	14
Item 1B.	Unresolved Staff Comments	21
Item 2.	Properties	21
Item 3.	Legal Proceedings	22
Item 4.	Submission of Matters to a Vote of Security Holders	23
PART II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	24
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	61
Item 8.	Financial Statements and Supplementary Data	62
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	62
Item 9A.	Controls and Procedures	62
Item 9A(T).	Controls and Procedures	63
Item 9B.	Other Information	63
PART III
Item 10.	Managers, Executive Officers and Corporate Governance	109
Item 11.	Executive Compensation	109
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	109
Item 13.	Certain Relationships and Related Transactions, and Director Independence	109
Item 14.	Principal Accountant Fees and Services	109
PART IV
Item 15.	Exhibits and Financial Statement Schedules	111
	Signatures	117

When the following terms and abbreviations appear in the text of this report, they have the meanings indicated below.


Ameren		Ameren Corporation
ARO(s)		asset retirement obligation(s)
Btu		British thermal units
CAA		Clean Air Act
CAIR		Clean Air Interstate Rule
CAMR		Clean Air Mercury Rule
Commonwealth Edison		Commonwealth Edison Company
CONE		cost of new entry
CPS		Combined Pollutant Standard
DOJ		United States Department of Justice
EIA		Energy Information Administration
EME		Edison Mission Energy
EMMT		Edison Mission Marketing & Trading, Inc.
EWG(s)		exempt wholesale generator(s)
Exelon Generation		Exelon Generation Company LLC
FASB		Financial Accounting Standards Board
FERC		Federal Energy Regulatory Commission
FGD		flue gas desulfurization
FIN No. 39-1		Financial Accounting Standards Board Staff Position No. 39-1, "Amendment of FASB Interpretation No. 39"
Fitch		Fitch Ratings
FPA		Federal Power Act
FSP SFAS No. 142-3		Financial Accounting Standards Board Staff Position SFAS No. 142-3, "Determination of the Useful Life of Intangible Assets"
GAAP		United States generally accepted accounting principles
GHG		greenhouse gas
GWh		gigawatt-hours
Illinois EPA		Illinois Environmental Protection Agency
Illinois Plants		EME's largest power plants (fossil fuel) located in Illinois
ISO(s)		independent system operator(s)
kV		kilovolt
LIBOR		London Interbank Offered Rate
MD&A		Management's Discussion and Analysis of Financial Condition and Results of Operations
Midwest Generation		Midwest Generation, LLC
MISO		Midwest Independent Transmission System Operator


MMBtu		million British thermal units
Moody's		Moody's Investors Service, Inc.
MW		megawatts
MWh		megawatt-hours
NLRB		National Labor Relations Board
NOV		notice of violation
NO_X		nitrogen oxide
NSR		New Source Review
PJM		PJM Interconnection, LLC
PRB		Powder River Basin
PUHCA 1935		Public Utility Holding Company Act of 1935 (as amended)
PUHCA 2005		Public Utility Holding Company Act of 2005
RPM		reliability pricing model
RTO(s)		regional transmission organization(s)
S&P		Standard & Poor's Ratings Services
SCR		selective catalytic reduction
SFAS		Statement of Financial Accounting Standards issued by the FASB
SFAS No. 133		Statement of Financial Accounting Standards No. 133, "Accounting for Derivative Instruments and Hedging Activities"
SFAS No. 157		Statement of Financial Accounting Standards No. 157, "Fair Value Measurements"
SFAS No. 158		Statement of Financial Accounting Standards No. 158, "Employers' Accounting for Defined Benefit Pension and Other Post-Retirement Plans"
SFAS No. 161		Statement of Financial Accounting Standards No. 161, "Disclosures About Derivative Instruments and Hedging Activities" (an amendment of FASB No. 133)
SIP(s)		state implementation plan(s)
SNCR		selective non-catalytic reduction
SO₂		sulfur dioxide
US EPA		United States Environmental Protection Agency

This annual report on Form 10-K contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These statements reflect Midwest Generation's current expectations and projections about future events based on Midwest Generation's knowledge of present facts and circumstances and assumptions about future events and include any statement that does not directly relate to a historical or current fact. Other information distributed by Midwest Generation that is incorporated in this annual report, or that refers to or incorporates this annual report, may also contain forward-looking statements. In this annual report and elsewhere, the words "expects," "believes," "anticipates," "estimates," "projects," "intends," "plans," "probable," "may," "will," "could," "would," "should," and variations of such words and similar expressions, or discussions of strategy or plans, are intended to identify forward-looking statements. Such statements necessarily involve risks and uncertainties that could cause actual results to differ materially from those anticipated. Some of the risks, uncertainties and other important factors that could cause results to differ, or that otherwise could impact Midwest Generation, include but are not limited to:

Certain of the risk factors listed above are discussed in more detail in "Item 1A. Risk Factors" and in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures." Additional information about the risk factors listed above and other risks and uncertainties is contained throughout this annual report. Readers are urged to read this entire annual report, including the information incorporated by reference, and carefully consider the risks, uncertainties and other factors that affect Midwest Generation's business. Forward-looking statements speak only as of the date they are made, and Midwest Generation is not obligated to publicly update or revise forward-looking statements. Readers should review future reports filed by Midwest Generation with the Securities and Exchange Commission.

Midwest Generation was formed on July 12, 1999 as a Delaware limited liability company with Edison Mission Midwest Holdings Co. as the sole owner. Edison Mission Midwest Holdings is a wholly owned subsidiary of Midwest Generation EME, LLC, which is in turn a wholly owned subsidiary of EME. EME is an indirect wholly owned subsidiary of Edison International. Midwest Generation was formed for the purpose of owning or leasing, making improvements to, and operating and selling the capacity and energy of, the power generation assets it purchased from Commonwealth Edison, which are referred to as the Illinois Plants. Midwest Generation acquired the Illinois Plants on December 15, 1999 for a purchase price of approximately $4.9 billion, with adjustments for changes in the book value of inventories and pro-rations related to specific items, including but not limited to taxes, rents and fees.

Concurrent with the acquisition of the Illinois Plants, Midwest Generation assigned its right to purchase the Collins Station, a 2,698 MW gas and oil-fired generating station located in Illinois, to four third-party entities. After this assignment, and the purchase of the facility by the third parties, an affiliate of Midwest Generation leased and Midwest Generation subleased the Collins Station. Each of the leases and subleases had an initial term of 33.75 years. In April 2004, Midwest Generation terminated the Collins Station lease through a negotiated transaction with the lease equity investor and received title to the Collins Station as part of the transaction. Following the lease termination, Midwest Generation permanently ceased operations at the Collins Station, effective September 30, 2004, and decommissioned the plant by December 31, 2004, and all units were permanently retired from service, disconnected from the grid, and rendered inoperable, with all operating permits surrendered.

As of December 31, 2008, Midwest Generation operated 5,776 MW of power plants, based on installed capacity acknowledged by PJM, consisting of:

Midwest Generation has a contract with EMMT, an EME subsidiary engaged in the power marketing and trading business, to sell energy and capacity into the wholesale market, to engage in hedging activities and to provide scheduling and other services. Midwest Generation has a revolving credit agreement with EMMT in order to make revolving loans to, or have letters of credit issued on behalf of, EMMT, to provide credit support for forward contracts. EMMT also purchases natural gas and has the ability to enter into fuel hedging arrangements on Midwest Generation's behalf.

In August 2000, Midwest Generation completed a sale-leaseback transaction with respect to the Powerton and Joliet power facilities to third-party lessors for an aggregate purchase price of $1.367 billion. In connection with this transaction, Midwest Generation facilitated the issuance of $333.5 million 8.30% Series A Pass-Through Certificates due 2009 and $813.5 million 8.56% Series B Pass-Through Certificates due 2016 through a private placement. In 2001, these certificates were subsequently exchanged for certificates identical in all material respects, which were registered with the Securities and Exchange Commission.

Global financial markets are experiencing severe credit tightening and a significant increase in volatility, causing access to capital markets to become subject to increased uncertainty and borrowing

costs. In response, U.S. and foreign governments and central banks have intervened with programs designed to increase liquidity and restore confidence.

Midwest Generation is in a capital intensive business and depends on access to the financial markets to fund capital expenditures, meet contractual obligations and support margin and collateral requirements. Midwest Generation has environmental compliance requirements and ongoing capital expenditures for its existing generation fleet. Capital expenditures require liquidity and access to capital markets at reasonable rates in the future. For further discussion, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Capital Expenditures."

Disruptions in the capital markets affected in 2008, and may continue to affect, Midwest Generation's ability to finance future capital expenditures. Furthermore, these disruptions may affect how Midwest Generation addresses its commitments with respect to environmental compliance, as discussed further in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Management's Overview; Critical Accounting Policies and Estimates—Management's Overview—Environmental Developments—Air Quality Regulation." Moreover, disruption in the financial markets appears to have reduced trading activity in power markets which may affect the level and duration of future hedging activity and potentially increase the volatility of earnings. Long-term disruption in the capital markets could adversely affect Midwest Generation's business plans and financial position.

Midwest Generation's principal executive offices are located at One Financial Place, 440 South LaSalle Street, Suite 3500, Chicago, Illinois 60605, and its telephone number is (312) 583-6000.

Midwest Generation's Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports, are electronically filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and are available on the Securities and Exchange Commission's internet web site at http://www.sec.gov.

EME is registered with the Securities and Exchange Commission and has financial statements that are filed in accordance with rules enacted by the Securities and Exchange Commission. For more information regarding EME, see its annual report on Form 10-K for the year ended December 31, 2008.

Historically, investor-owned utilities and government-owned power agencies were the only producers of bulk electric power intended for sale to third parties in the United States. However, the United States electric industry, including companies engaged in providing generation, transmission, distribution and retail sales and service of electric power, has undergone significant deregulation over the last three decades, which has led to increased competition, especially in the generation sector. Most recently, through the Energy Policy Act of 2005, the U.S. Congress recognized that a significant market for electric power generated by independent power producers, such as Midwest Generation, has developed in the United States and indicated that competitive wholesale electricity markets have become accepted as a fundamental aspect of the electricity industry.

As part of the developments discussed above, the FERC has encouraged the formation of ISOs and RTOs. In those areas where ISOs and RTOs have been formed, market participants have open access to

transmission service typically at a system-wide rate. ISOs and RTOs may also operate real-time and day-ahead energy and ancillary service markets, which are governed by FERC-approved tariffs and market rules. The development of such organized markets into which independent power producers are able to sell has reduced their dependence on bilateral contracts with electric utilities. See further discussion of regulations under "Regulatory Matters—U.S. Federal Energy Regulation."

In various regional markets, electricity market administrators have acknowledged that the markets for generating capacity do not provide sufficient revenues to enable existing merchant generators to recover all of their costs or to encourage new generating capacity to be constructed. Capacity auctions have been implemented in some markets, including PJM, to address this issue. This approach is currently expected to provide significant additional capacity revenues for independent power producers.

Energy generated at the Illinois Plants after their acquisition in 1999 was sold under three power purchase agreements between Midwest Generation and Exelon Generation under which Exelon Generation was obligated to make capacity payments for the plants under contract and energy payments for the energy produced by the Illinois Plants and taken by Exelon Generation. The power purchase agreements began on December 15, 1999, and all had been terminated by December 31, 2004.

All the energy and capacity from the Illinois Plants is now sold under terms, including price and quantity, arranged by EMMT with customers through a combination of bilateral agreements (resulting from negotiations or from auctions), forward energy sales and spot market sales. Thus, Midwest Generation is subject to market risks related to the price of energy and capacity from the Illinois Plants. Power generated at the Illinois Plants is generally sold into PJM, an RTO which includes all or parts of Delaware, Illinois, Indiana, Kentucky, Maryland, Michigan, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia and the District of Columbia.

PJM operates a wholesale spot energy market and determines the market-clearing price for each hour based on bids submitted by participating generators which indicate the minimum prices a bidder is willing to accept to be dispatched at various incremental generation levels. PJM conducts both day-ahead and real-time energy markets. PJM's energy markets are based on locational marginal pricing, which establishes hourly prices at specific locations throughout PJM. Locational marginal pricing is determined by considering a number of factors, including generator bids, load requirements, transmission congestion and transmission losses. It can also be affected by, among other things, market mitigation measures and energy market price caps.

PJM requires all load-serving entities to maintain prescribed levels of capacity, including a reserve margin, to ensure system reliability. PJM also determines the amount of capacity available from each specific generator and operates capacity markets. PJM's capacity markets have a single market-clearing price. Load-serving entities and generators, such as Midwest Generation, may participate in PJM's capacity markets or transact capacity sales on a bilateral basis. For a discussion of legal challenges to the prices resulting from PJM's capacity auctions, see "Regulatory Matters—PJM Matters—RPM Buyers' Complaint."

In September 2006, the first Illinois power procurement auction was held according to the rules approved by the Illinois Commerce Commission. Through the auction, EMMT entered into two load requirements service contracts. Under the terms of these agreements, Midwest Generation is delivering, through EMMT, electricity, capacity and specified ancillary, transmission and load following services necessary to serve a portion of Commonwealth Edison's residential and small commercial customer load.

For a discussion of the market risks related to Midwest Generation's sale of electricity, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures."

Midwest Generation is subject to intense competition from energy marketers, investor-owned utilities, government-owned power agencies, industrial companies, financial institutions, and other independent power producers. Some of Midwest Generation's competitors have a lower cost of capital than most independent power producers and, in the case of utilities, are often able to recover fixed costs through rate base mechanisms, allowing them to build, buy and upgrade generation without relying exclusively on market clearing prices to recover their investments. These companies may also have competitive advantages as a result of their scale and the location of their generation facilities.

Environmental regulations, particularly those that impose stringent state specific emission limits, could put Midwest Generation's coal-fired plants at a disadvantage compared with competing power plants operating in nearby states and subject only to federal emission limits. Potential future climate change regulations could also put Midwest Generation's coal-fired power plants at a disadvantage compared to both power plants utilizing other fuels and utilities that may be able to recover climate change compliance costs through rate mechanisms. In addition, Midwest Generation's ability to compete may be affected by governmental and regulatory activities designed to support the construction and operation of power generation facilities fueled by renewable energy sources.

The Crawford Station is a 532 MW coal-fired power plant located in Cook County, Illinois, and is within the city limits of Chicago. The Crawford Station occupies approximately 72 acres, inclusive of the switchyard. The operating units are referred to as Units 7 and 8 and began operations in 1958 and 1961, respectively.

Southern PRB coal is loaded into barges at the Will County Station and delivered by barge primarily on a "just-in-time" basis supported by Crawford's on-site storage. Natural gas is used for ignition and combustion support and for full boiler operation, when economical. Peoples Energy Corporation delivers natural gas under a delivery contract that includes balancing storage, which is also shared by the Fisk Station.

The Fisk Station is a 326 MW coal-fired power plant located in Cook County, Illinois, and is within the city limits of Chicago. The Fisk Station is located on approximately 44 acres, inclusive of the switchyard. The operating unit comprising the Fisk Station is referred to as Unit 19 and began operations in 1959.

Southern PRB coal is loaded into barges at the Will County Station, delivered by barge on a "just-in-time" basis. Natural gas is used for ignition and combustion support and for full boiler operation, when economical. Peoples Gas delivers natural gas under a delivery contract that includes balancing storage, which is shared by the Crawford Station.

The Joliet Station is located in Joliet, Will County, Illinois, approximately 40 miles southwest of Chicago on an approximately 467-acre site. The operating units comprising the Joliet Station are referred to as Units 6, 7 and 8. Only Units 7 and 8 are subject to the leveraged lease transaction described in this annual report. The operation of Units 6, 7 and 8 began in 1959, 1965 and 1966, respectively. Joliet Unit 6 is a 290 MW coal-fired unit located adjacent to, but across the Des Plaines River from, Joliet Units 7 and 8. Joliet Units 7 and 8 are coal-fired and have a combined capacity of 1,036 MW. The Joliet Station burns Southern PRB coal which is shipped by rail. With the completion of a new rail spur in early 2003, direct deliveries are received from the Union Pacific Railroad. Natural gas is delivered for the boilers as a startup and stabilizing fuel by Nicor Gas Company under a delivery contract.

The Powerton Station is a 1,538 MW coal-fired station located in Pekin, Tazwell County, Illinois, approximately 16 miles southwest of Peoria or 166 miles from Chicago on an approximately 568-acre site. The Powerton Station is subject to the leveraged lease transaction described in this annual report. The site also includes an approximately 1,440-acre lake. The operating units comprising the Powerton Station are referred to as Units 5 and 6 and began operations in 1972 and 1975, respectively. The Powerton Station burns Southern PRB coal which is shipped by rail by the Illinois and Midland Railroad Company from interchange points with the Union Pacific Railroad.

The Waukegan Station is a 689 MW coal-fired power plant located in Waukegan, Lake County, Illinois, on Lake Michigan. The Waukegan Station occupies approximately 194 acres, inclusive of the switchyard. The operating units comprising the Waukegan Station are referred to as Units 7 and 8 and began operations in 1958 and 1962, respectively. Midwest Generation shut down permanently Unit 6, representing 100 MW of capacity, on December 21, 2007. Unit 7 utilizes oil or natural gas and Unit 8 utilizes natural gas for ignition and startup. The Waukegan Station burns Southern PRB coal, which is shipped by rail by the Union Pacific Railroad.

The Will County Station is a 1,060 MW coal-fired power plant located in Romeoville, Will County, Illinois. The Will County Station is located on approximately 215 acres, inclusive of the switchyard. The operating units comprising the Will County Station are referred to as Units 1, 2, 3 and 4 and began operations between 1955 and 1963. Beginning in January 2003, operations at Units 1 and 2 were suspended pending improvement in market conditions. In late 2004, both units were returned to service. Midwest Generation has agreed with the Illinois EPA to shut down permanently Units 1 and 2 on or before December 31, 2010.

The Will County Station burns Southern PRB coal, which is shipped by rail by the Elgin, Joliet & Eastern Railway Company from interchange points with the Union Pacific Railroad. The Will County Station uses No. 2 fuel oil for ignition and combustion support, which is delivered by tanker truck to a 100,000 gallon on-site storage tank.

On September 30, 2004, Midwest Generation permanently ceased operations at the Collins Station and all units were decommissioned on or before December 31, 2004. The Collins Station was a 2,698 MW gas and oil-fired power plant located in Grundy County, near Morris, Illinois.

The on-site peaking units of Joliet and the off-site peaking units of Calumet, Electric Junction, Lombard and Sabrooke ceased operations as of December 31, 2004 following a management analysis of the future competitiveness of eight of Midwest Generation's small peaking units in the expanded PJM marketplace in September 2004. In addition, the on-site peaking units of Crawford ceased operations as of April 21, 2005 as a result of the same management analysis. The remaining on-site peaking units consist of Fisk and Waukegan, which were commissioned in 1968.

The Fisk and Waukegan peaking units burn No. 1 fuel oil (jet fuel). Natural gas is used by the Fisk peaking unit for ignition. Natural gas is purchased in the monthly and daily spot markets and is shipped at the seller's risk to Chicago. Peoples Gas provides delivery services, including balancing storage, to the site under tariffs approved by the Illinois Commerce Commission. Midwest Generation purchases No. 1 fuel oil and No. 2 fuel oil from bids taken annually. The oil price is tied to the Oil Price Information Service posted price (the market price) on the date of delivery. Shipments to the various sites are in tanker trucks and inventory is replenished as needed by the site. Truck delivery charges are at fixed agreed-upon prices.

Station units at Will County, Crawford, Waukegan, and Joliet Unit 6 are connected to Commonwealth Edison's 138 kV transmission systems. The Fisk Station is connected via various circuit breakers and transformers to transmission substations. The Joliet Units 7 and 8, subject to the leveraged lease transactions, and the two Powerton units deliver their power into Commonwealth Edison's 345 kV transmission system. Prior to May 1, 2004, sales of power produced by Midwest Generation required using transmission that had to be obtained from Commonwealth Edison. As mentioned previously, the Illinois Plants are generally dispatched into the PJM market, and sales may also be made from PJM into the MISO.

In the past three fiscal years, Midwest Generation derived a significant source of its operating revenues from electric power sold into the PJM market by EMMT. Sales into PJM accounted for approximately 58%, 49% and 67% of Midwest Generation's consolidated operating revenues for the years ended December 31, 2008, 2007 and 2006, respectively.

Beginning in January 2007, Midwest Generation derived a significant source of its revenues from the sale of energy, capacity and ancillary services generated to Commonwealth Edison under load requirements services contracts. Sales under these contracts accounted for 18% and 30% of Midwest Generation's consolidated operating revenues for the years ended December 31, 2008 and 2007, respectively.

Coal is used to fuel 5,471 MW of Midwest Generation's generating capacity. The coal is purchased from several suppliers that operate mines in the Southern PRB of Wyoming. The total volume of coal consumed annually is largely dependent on the amount of generation and ranges between 17.5 million to 19.5 million tons.

All coal is transported under long-term transportation agreements with the Union Pacific Railroad and various delivering carriers. As of December 31, 2008, Midwest Generation leased approximately 4,000 railcars to transport the coal from the mines to the generating stations and the leases have remaining terms that range from less than two years to 11 years, with options to extend the leases or purchase some railcars at the end of the lease terms. The coal is transported nearly 1,200 miles from the mines to the Illinois Plants.

Coal for the Fisk and Crawford Stations is typically shipped by rail to the Will County Station where it is transferred from the railcars, blended as necessary to meet station specifications, and loaded into river barges. These barges are towed to the stations by an independent contractor under a transportation agreement with Midwest Generation. Occasionally, third-party transloading facilities are utilized.

Midwest Generation has approximately 305 MW of peaking capacity in the form of simple cycle combustion turbines at the Fisk and Waukegan Stations. These units are fueled with distillate fuel oils.

See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Contractual Obligations, Commitments and Contingencies," for additional discussion of contractual commitments related to Midwest Generation's fuel supply and coal transportation contracts.

The federal Acid Rain Program requires electric generating stations to hold SO₂ allowances sufficient to cover their annual emissions. Illinois regulations implemented the federal NO_X SIP Call which required, through 2008, the holding of NO_X allowances to cover ozone season NO_X emissions. In addition, pursuant to Illinois' implementation of the CAIR, electric generating stations are required to hold seasonal and annual NO_X allowances beginning January 1, 2009. As part of the acquisition of the Illinois Plants, Midwest Generation obtained the rights to the emission allowances that have been or are allocated to these facilities. Midwest Generation purchases (or sells) emission allowances based on the amounts required for actual generation in excess of (or less than) the amounts allocated under these programs.

See "Item 8. Financial Statements and Supplementary Data—Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations" for a discussion of environmental regulations related to emissions. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures—Commodity Price Risk—Emission Allowances Price Risk" for a discussion of price risks related to the purchase or sale of emission allowances.

Midwest Generation maintains insurance policies consistent with those normally carried by companies engaged in similar business and owning similar properties. Midwest Generation's insurance program includes all-risk property insurance, including business interruption, covering real and personal property, including losses from boilers, machinery breakdowns, and the perils of earthquake and flood, subject to specific sublimits. Midwest Generation also carries general liability insurance covering liabilities to third parties for bodily injury or property damage resulting from operations, automobile liability insurance and excess liability insurance. Limits and deductibles in respect of these insurance policies are comparable to those carried by other electric generating facilities of similar size. However, no assurance can be given that Midwest Generation's insurance will be adequate to cover all losses.

Due to higher electric demand resulting from warmer weather during the summer months and cold weather during the winter months, electric revenues from the Illinois Plants vary substantially on a seasonal basis. In addition, maintenance outages generally are scheduled during periods of lower projected electric demand (spring and fall) further reducing generation and increasing major maintenance costs which are recorded as an expense when incurred. Accordingly, earnings from the Illinois Plants are seasonal and have significant variability from quarter to quarter. Seasonal fluctuations may also be affected by changes in market prices. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures—Commodity Price Risk—Energy Price Risk" for further discussion regarding market prices.

Midwest Generation's operations are subject to extensive regulation by governmental agencies. Midwest Generation is subject to energy, environmental and other governmental laws and regulations at the federal, state and local levels in connection with the ownership and operation of the Illinois Plants, and the use of electric energy, capacity and related products, including ancillary services from those facilities. In addition, Midwest Generation is subject to the market rules, procedures, and protocols of the markets in which it participates.

The laws and regulations that affect Midwest Generation and its operations are in a state of flux. Complex and changing environmental and other regulatory requirements could necessitate substantial expenditures and could create a significant risk of expensive delays or significant loss of value if one or more of the Illinois Plants were to become unable to function as planned due to changing requirements or local opposition.

The FERC has ratemaking jurisdiction and other authority with respect to wholesale sales and interstate transmission of electric energy (other than transmission that is "bundled" with retail sales) under the FPA and with respect to certain interstate sales, transportation and storage of natural gas under the Natural Gas Act of 1938. Independent power production has been further encouraged by the passage of the Energy Policy Act in 1992, which provided additional exemptions from PUHCA 1935 for EWGs, such as Midwest Generation, and the Energy Policy Act of 2005, which included provisions for the repeal of PUHCA 1935, amendments to the Public Utility Regulatory Policies Act of 1978 (PURPA), merger review reform, the introduction of new regulations regarding transmission operation improvements, FERC authority to impose civil penalties for violation of its regulations, transmission rate reform and incentives for various generation technologies.

On July 20, 2006, the FERC certified the North American Electric Reliability Corporation (NERC) as its Electric Reliability Organization to establish and enforce reliability standards for the bulk power system. Compliance with these standards became mandatory on June 18, 2007. Midwest Generation believes it has taken all steps to be compliant with current NERC reliability standards that apply to its operations.

The FPA grants the FERC exclusive jurisdiction over the rates, terms and conditions of wholesale sales of electricity and transmission services in interstate commerce (other than transmission that is "bundled" with retail sales), including ongoing, as well as initial, rate jurisdiction. This jurisdiction allows the FERC to revoke or modify previously approved rates after notice and opportunity for hearing. These rates may be based on a cost-of-service approach or, in geographic and product markets determined by the FERC to be workably competitive, may be market based.

EWGs certified in accordance with the FERC's rules under PUHCA 2005 are subject to the FPA and to the FERC's ratemaking jurisdiction thereunder, but the FERC typically grants EWGs the authority to sell power at market-based rates to purchasers which are not affiliated electric utility companies as long as the absence of market power is shown. On November 9, 1999, the FERC issued an order determining that, based on the facts stated in Midwest Generation's application, Midwest Generation is an EWG.

Midwest Generation is authorized by the FERC to make wholesale market sales of power at market-based rates and is subject to the FERC ratemaking regulation under the FPA. The FERC's order, as is customary with market-based rate schedules, reserves the right to revoke Midwest Generation's market-based rate authority on a prospective basis if it is subsequently determined that Midwest Generation or any of its affiliates possess excessive market power. If the FERC were to revoke Midwest Generation's market-based rate authority, it would be necessary for Midwest Generation to file, and obtain the FERC's acceptance of, its rate schedule as a cost-of-service rate schedule. In addition, the loss of market-based rate authority would subject Midwest Generation to the accounting, record keeping and reporting requirements that are imposed on utilities with cost-based rate schedules. If Midwest Generation were to lose its EWG status, defaults under the covenants in Midwest Generation's agreements could be triggered.

The FPA also grants the FERC jurisdiction over the sale or transfer of specified assets, including wholesale power sales contracts and generation facilities, and in some cases, jurisdiction over the issuance of securities or the assumption of specified liabilities and some interlocking directorates. Dispositions of Midwest Generation's jurisdictional assets or certain types of financing arrangements may require FERC approval.

Midwest Generation utilizes power lines owned by others for the transmission of electricity. The prices and other terms and conditions of transmission contracts are regulated by the FERC when the entity providing the transmission service is a jurisdictional public utility under the FPA, Order No. 2000, and subsequent orders.

The Energy Policy Act of 1992 laid the groundwork for a competitive wholesale market for electricity by, among other things, expanding the FERC's authority to order electric utilities to transmit third-party electricity over their transmission lines, thus allowing EWGs, such as Midwest Generation to more effectively compete in the wholesale market.

The Illinois Commerce Commission does not have jurisdiction over Midwest Generation. Midwest Generation is not considered a public utility for purposes of Illinois state law, nor is Midwest Generation certified by the Illinois Commerce Commission as an alternative retail electric supplier.

Although state public utility commissions do not have jurisdiction to modify the terms of wholesale power sales, Midwest Generation cannot provide assurance that its power sales contracts will not be subject to adverse consequences as a result of regulatory actions by a state commission even though it sells power exclusively at wholesale.

In February 2005, Commonwealth Edison and the Ameren Illinois utilities filed tariffs at the Illinois Commerce Commission proposing the adoption of what is known as a New Jersey style full requirement auction process for the procurement of power for the utilities' bundled customers beginning January 1, 2007. The Illinois Commerce Commission unanimously approved the competitive auction process on January 24, 2006.

The Illinois Power Agency Act, signed into law on August 28, 2007, establishes a new process for Commonwealth Edison and the Ameren Illinois utilities to procure power for their bundled-rate customers. On July 1, 2008, the two utilities began procuring power for bundled-rate customers by means of existing full requirements contracts that have not yet expired, certain multi-year swap contracts that they entered into with their affiliates pursuant to the Illinois Power Agency Act, and a competitive request for proposal procurement of standard wholesale power products run by independent procurement administrators with the oversight and approval of the Illinois Commerce Commission. The Illinois Power Agency Act provides further that starting in June 2009, a newly created Illinois Power Agency will be responsible for the administration, planning and procurement of power for Commonwealth Edison and the Ameren Illinois utilities' bundled-rate customers using a portfolio-managed approach that is to include competitively procured standard wholesale products and renewable energy resources. The Illinois Commerce Commission will continue in its role of oversight and approval of the power planning and procurement for bundled retail customers of the utilities.

On January 7, 2009, the Illinois Commerce Commission approved a procurement plan for 2009 that was proposed by the Illinois Power Agency. The plan, which is based on five-year demand forecasts, proposes a laddered procurement strategy for the period beginning in 2009 and ending in 2014. In 2009, the Illinois Power Agency is expected to acquire through a single request for proposals roughly one third of the forecasted demand for bundled load for Commonwealth Edison and Ameren. Renewable requirements, in the first year, will be purchased by way of one-year renewable energy credits; longer contracts may be included in future procurements if required by law or if approved by the Illinois Commerce Commission. The Illinois Power Agency issued its request for proposals in February 2009 and to plans conduct its procurement between mid-March and mid-April 2009.

On June 1, 2007, PJM implemented the RPM for capacity. The purpose of the RPM is to provide a long-term pricing signal for capacity resources. The RPM provides a mechanism for PJM to satisfy the

region's need for generation capacity, the cost of which is allocated to load-serving entities through a locational reliability charge. Also on June 1, 2007, PJM implemented marginal losses for transmission for its competitive wholesale electric market. For further discussion regarding the RPM and recent auctions, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures—Commodity Price Risk—Capacity Price Risk."

On May 30, 2008, a group of entities referring to themselves as the "RPM Buyers" filed a complaint at the FERC asking that PJM's RPM, as implemented through the transitional base residual auctions establishing capacity payments for the period from June 1, 2008 through May 31, 2011, be found to have produced unjust and unreasonable capacity prices. On September 19, 2008, the FERC dismissed the RPM Buyers' complaint, finding that the RPM Buyers had failed to allege or prove that any party violated PJM's tariff and market rules, and that the prices determined during the transition period were determined in accordance with PJM's FERC-approved tariff. On October 20, 2008, the RPM Buyers requested rehearing of the FERC's order dismissing their complaint. This matter is currently pending before the FERC. Midwest Generation cannot predict the outcome of this matter.

On December 12, 2008, PJM submitted revised RPM Tariff sheets pursuant to Section 205 of the FPA, proposing RPM auction modifications relating to CONE values, including a proposal to modify how scarcity pricing revenues are incorporated in the Net Energy and Ancillary Services Revenue Offset, new rules for participation of demand side management resources in the RPM auctions, and a proposed holdback of 2.5% of the reliability requirement from the Base Residual Auction. The CONE is used to construct the demand curve for RPM auctions, and its level affects the clearing price for those auctions (which is determined at the intersection of the supply and demand curves).

On February 9, 2009, PJM and several other parties to the proceedings filed a proposed settlement with the FERC with a proposed effective date of March 27, 2009. The CONE values in the proposed settlement represent a 10% decrease from those contained in PJM's December 12, 2008 filing. The proposed settlement would retain the 2.5% holdback proposed in PJM's December 12 filing and would increase the length of forward commitment for new capacity resources to seven years, instead of the five years originally proposed by PJM.

There was a high level of opposition to PJM's proposed modifications from buyers and consumers, and a similarly high level of opposition is expected with respect to the proposed settlement. The effect of the FERC's actions on future RPM auctions cannot be determined at this time. The CONE as proposed for the May 2009 RPM auction for the 2012/2013 delivery year is higher than what is currently effective in the tariff.

See the discussion on environmental matters and regulations in Note 9—Commitments and Contingencies under "Item 8. Financial Statements and Supplementary Data—Midwest Generation, LLC Notes to Consolidated Financial Statements," as well as the discussions on the NOV issued to Midwest Generation under "Item 3. Legal Proceedings."

At December 31, 2008, Midwest Generation employed 1,105 employees, approximately 746 of whom were covered by a collective bargaining agreement with the International Brotherhood of Electrical Workers, Local 15, AFL-CIO (Local 15), governing wages, certain benefits and working conditions. This agreement will expire on December 31, 2009. Midwest Generation also has a separate collective bargaining agreement governing retirement, health care, disability and insurance benefits that expires on June 15, 2010.

The global financial crisis may have a material adverse impact on Midwest Generation's access to capital necessary to fund contractual obligations and the ability of Midwest Generation's counterparties to perform their contractual obligations.

Financial market and economic conditions had in 2008, and may continue to have, an adverse effect on Midwest Generation's business and financial condition. The capital markets were not available to Midwest Generation during the fourth quarter of 2008, and market uncertainty has continued into 2009. Midwest Generation's ability to raise capital has been, and could continue to be, adversely affected by volatile and unpredictable global market and economic conditions. Even after the capital markets recover, recent disruptions in the credit markets may have lasting effects on the availability of credit, cost of borrowing, and terms and conditions of new borrowings.

Liquidity is essential to Midwest Generation's business. Midwest Generation cannot provide assurance that its projected sources of capital will be available when needed or that its actual cash requirements will not be greater than expected. Lack of available capital may affect Midwest Generation's ability to complete environmental improvements as prescribed by the CPS, which could lead to the eventual shutdown of a material part of the Illinois Plants.

In addition to the potential effect on Midwest Generation's liquidity, the global financial crisis could have a negative effect on the markets in which Midwest Generation sells power, purchases fuel and performs other trading and marketing activities. In recent years, global financial institutions have been active participants in such markets. As such financial institutions consolidate and operate under more restrictive capital constraints in response to the financial crisis, there could be less liquidity in the energy and commodity markets, which could have a negative effect on Midwest Generation's ability to hedge and transact with creditworthy counterparties. In addition, Midwest Generation is exposed to the risk that its counterparties, including customers, suppliers and business partners, may fail to perform according to the terms of their contractual arrangements. Deterioration in the financial condition of Midwest Generation's counterparties as a result of the global financial crisis, and the resulting failure to pay amounts owed or to perform obligations in excess of posted collateral, could have a negative effect on Midwest Generation's business and financial condition.

Midwest Generation's operations are subject to market risks related to wholesale energy prices.

Midwest Generation is subject to market risks related to the price of energy, capacity and ancillary services. The market prices for these products in PJM are influenced by multiple factors beyond Midwest Generation's control, which include:

In addition, unlike most other commodities, electric power can only be stored on a very limited basis and generally must be produced concurrently with its use. As a result, the wholesale power markets are subject to significant and unpredictable price fluctuations over relatively short periods of time. There is no assurance that Midwest Generation will be successful in selling energy and capacity into the markets or that the prices received for the energy and capacity will generate positive cash flow. Due to the volatility of market prices in PJM for energy and capacity during the past several years, Midwest Generation cannot predict whether sales of energy and capacity to other customers or the market will be at prices sufficient to generate cash flow necessary to meet Midwest Generation's obligations. If Midwest Generation's operations do not meet these objectives, Midwest Generation may not be able to generate enough cash to service its own debt and lease obligations, which would have a material adverse effect on Midwest Generation.

Midwest Generation's financial results can be affected by changes in fuel prices, fuel transportation cost increases, and interruptions in fuel supply.

Midwest Generation's business is subject to changes in fuel costs, which may negatively affect its financial results and financial position by increasing the cost of producing power. The fuel markets can be volatile, and actual fuel prices can differ from Midwest Generation's expectations.

Although Midwest Generation attempts to purchase fuel based on its known fuel requirements, it is still subject to the risks of supply interruptions, transportation cost increases, and fuel price volatility. In addition, fuel deliveries may not exactly match energy sales, due in part to the need to purchase fuel inventories in advance for reliability and dispatch requirements. The price at which Midwest Generation can sell its energy may not rise or fall at the same rate as a corresponding rise or fall in fuel costs.

Midwest Generation is exposed to market risks through its ownership and operation of the Illinois Plants. These market risks include, among others, volatility arising from the timing differences associated with buying fuel, converting fuel into energy and delivering energy to a buyer. Through EMMT, Midwest Generation uses forward contracts and derivative financial instruments, such as futures contracts and options, to manage market risks and exposure to fluctuating electricity and fuel prices. However, Midwest Generation cannot provide assurance that these strategies will successfully mitigate market risks.

Midwest Generation may not cover the entire exposure of its assets or positions to market price volatility, and the level of coverage will vary over time. Fluctuating commodity prices may affect Midwest Generation's financial results, either favorably or unfavorably, to the extent that assets and positions have not been hedged.

EME, directly and through a subsidiary, has historically provided credit support to its subsidiaries, including EMMT, which markets the energy and capacity from the Illinois Plants. Midwest Generation is permitted to use its working capital facility and cash on hand to provide credit support (either through loans or letters of credit) for forward contracts with third-party counterparties entered into by EMMT for capacity and energy generated by Midwest Generation. Although EME may provide credit support from time to time, Midwest Generation uses its working capital facility instead of relying on credit support from EME. Utilization of this credit facility, or cash on hand, in support of such forward contracts provides additional liquidity support for implementation of Midwest Generation's contracting strategy for the Illinois Plants.

The effectiveness of Midwest Generation's hedging activities may depend on the amount of working capital available to post as collateral in support of these transactions, either in support of performance guarantees or as a cash margin. The amount of credit support that must be provided typically is based on the difference between the price of the commodity in a given contract and the market price of the commodity. Significant movements in market prices can result in a requirement to provide cash collateral and letters of credit in very large amounts. Without adequate liquidity to meet margin and collateral requirements, Midwest Generation could be exposed to the following:

As a result of these and other factors, Midwest Generation cannot predict the effect that risk management decisions may have on its business, operating results or financial position.

The independent power industry is characterized by numerous capable competitors, some of whom may have more extensive experience in the acquisition and development of power projects, larger staffs, and greater financial resources than Midwest Generation. Several participants in the wholesale markets, including many regulated utilities, have a lower cost of capital than most merchant generators and often are able to recover fixed costs through rate base mechanisms, allowing them to build, buy and upgrade generation assets without relying exclusively on market clearing prices to recover their investments. This could affect Midwest Generation's ability to compete effectively in the markets in which those entities operate.

Newer plants owned by Midwest Generation's competitors are often more efficient than Midwest Generation's facilities. This may put some of Midwest Generation's facilities at a competitive disadvantage to the extent that its competitors are able to produce more power from each increment of fuel than Midwest Generation's facilities are capable of producing. Over time, the Illinois Plants may become obsolete in their markets, or be unable to compete, because of the construction of newer, more efficient power plants.

In addition to the competition already existing in the markets in which Midwest Generation presently operates or may consider operating in the future, Midwest Generation is likely to encounter significant competition as a result of further consolidation of the power industry by mergers and asset reallocations, which could create larger competitors, as well as new market entrants. In addition, regulatory initiatives may result in changes in the power industry to which Midwest Generation may not be able to respond in as timely and effective manner as its competitors.

The Illinois Plants may be affected by general operating risks and hazards customary in the power generation industry. Midwest Generation may not have adequate insurance to cover all these hazards.

The operation of power generation facilities involves many operating risks, including:

These and other hazards can cause significant personal injury or loss of life, severe damage to and destruction of property, plant and equipment, contamination of or damage to the environment, and suspension of operations. The occurrence of one or more of the events listed above could decrease or eliminate revenues generated by the Illinois Plants or significantly increase the costs of operating them, and could also result in Midwest Generation being named as a defendant in lawsuits asserting claims for substantial damages, potentially including environmental cleanup costs, personal injury, property damage, fines and penalties. Equipment and plant warranties, guarantees, and insurance may not be sufficient or effective under all circumstances to cover lost revenues or increased expenses. A decrease or elimination in revenues generated by the facilities or an increase in the costs of operating them could decrease or eliminate funds available to meet Midwest Generation's obligations as they become due and could have a material adverse effect on Midwest Generation.

Midwest Generation is subject to extensive environmental regulation and permitting requirements that may involve significant and increasing costs.

Midwest Generation's operations are subject to extensive environmental regulations with respect to, among other things, air quality, water quality, waste disposal, and noise. Midwest Generation is required to obtain, and comply with conditions established by, licenses, permits and other approvals in order to construct, operate or modify its facilities. Failure to comply with these requirements could subject Midwest Generation to civil or criminal liability, the imposition of liens or fines, or actions by regulatory agencies seeking to curtail Midwest Generation's operations. Midwest Generation may also be exposed to risks arising from past, current or future contamination at its former or existing facilities or with respect to off-site waste disposal sites that have been used in its operations.

Midwest Generation devotes significant resources to environmental monitoring, pollution control equipment and emission allowances to comply with environmental regulatory requirements. Midwest Generation believes that it is currently in substantial compliance with environmental regulatory requirements. However, the US EPA has issued an NOV to Midwest Generation and Commonwealth Edison, the former owner of Midwest Generation's coal-fired power plants, alleging violations of the CAA and certain opacity and particulate matter standards. The current trend is toward more stringent standards, stricter regulation, and more expansive application of environmental regulations. Environmental advocacy groups and regulatory agencies in the United States have been focusing considerable attention on carbon dioxide emissions from coal-fired power plants and their potential role in climate change. The adoption of laws and regulations to implement carbon dioxide controls could adversely affect the Illinois Plants. Also, coal plant emissions of NO_X and SO₂, mercury and particulates are subject to increased controls and mitigation expenses under current regulations and may be subject to new, possibly stricter, regulation in the future. The continued operation of the Illinois Plants is expected to require substantial capital expenditures for environmental controls.

Midwest Generation has entered into an agreement with the Illinois EPA to reduce mercury, NO_X and SO₂ emissions at the Illinois Plants. The agreement has been embodied in an Illinois rule called the CPS. All of Midwest Generation's Illinois coal-fired electric generating units are subject to the CPS. Capital expenditures relating to controls contemplated by the CPS could be significant. Midwest Generation may ultimately decide to comply with CPS requirements by shutting down units rather than making improvements. Midwest Generation is evaluating all technology and unit shutdown combinations, including interim compliance solutions, to determine the economic effects of compliance with the CPS and optimal methods of compliance. For more information about the CPS requirements and Midwest Generation's plans for compliance," see "Item 8. Financial Statements and Supplementary Data—Midwest

Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations—Air Quality Regulation—Clean Air Interstate Rule."

In addition, future environmental laws and regulations, and future enforcement proceedings that may be taken by environmental authorities, could affect the costs and the manner in which Midwest Generation conducts its business. There is no assurance that Midwest Generation would be able to recover these increased costs from its customers or that its business, financial condition and results of operations would not be materially adversely affected. Changing environmental regulations could require Midwest Generation to purchase additional emission allowances or install additional pollution control technology, and could make some units uneconomical to maintain or operate. If Midwest Generation cannot comply with all applicable regulations, it could be required to retire or suspend operations at its facilities, or restrict or modify the operations of its facilities, and its business, results of operations and financial condition could be adversely affected.

Typically, environmental laws require a lengthy and complex process for obtaining licenses, permits and approvals prior to construction, operation or modification of a project or generating facility. Meeting all the necessary requirements can delay or sometimes prevent the completion of a proposed project as well as require extensive modifications to existing projects, which may involve significant capital or operational expenditures. Midwest Generation cannot provide assurance that it will be able to obtain and comply with all necessary licenses, permits and approvals for the Illinois Plants.

Midwest Generation's operations are subject to extensive regulation by governmental agencies. Federal laws and regulations govern, among other things, transactions by and with purchasers of power, including utility companies, the development and construction of generation facilities, the ownership and operation of generation facilities, and access to transmission. Under limited circumstances where exclusive federal jurisdiction is not applicable or specific exemptions or waivers from state or federal laws or regulations are otherwise unavailable, federal and/or state utility regulatory commissions may have broad jurisdiction over non-utility owned electric power plants such as the Illinois Plants. Generation facilities are also subject to federal, state and local laws and regulations that govern, among other things, the geographical location, zoning, land use and operation of a project.

In addition to its exposure to government regulation affecting all electric power suppliers and generating companies on a national level, Midwest Generation is especially susceptible to regulatory actions and litigation outcomes that are specific to the geographic power market in which the Illinois Plants are located. For example, the FERC may impose various forms of market mitigation measures, including price caps and operating restrictions, where it determines that potential market power might exist and that the public interest requires mitigation. In addition, ISOs and RTOs may impose bidding and scheduling rules, both to curb the potential exercise of market power and to facilitate market functions. Such actions may materially affect Midwest Generation's results of operations.

There is no assurance that the introduction of new laws or other future regulatory developments will not have a material adverse effect on Midwest Generation's business, results of operations or financial condition, nor is there any assurance that Midwest Generation will be able to obtain and comply with all necessary licenses, permits and approvals for its plants. If Midwest Generation cannot comply with all applicable regulations, its business, results of operations and financial condition could be adversely affected.

Restrictions in the instruments binding on Midwest Generation and its subsidiaries may limit its and their ability to enter into specified transactions that it or they otherwise might enter into.

EME has entered into debt agreements that contain restrictive covenants that are applicable to its subsidiaries, including Midwest Generation. The instruments governing Midwest Generation's indebtedness also contain financial and investment covenants. These restrictions may significantly impede Midwest Generation's ability to take advantage of business opportunities as they arise, to grow its business or to compete effectively, to make capital expenditures when required, or to develop and implement refinancing plans in respect of its indebtedness.

Midwest Generation has a substantial amount of indebtedness, including long-term lease obligations and Midwest Generation's ability to meet its obligations under its long-term leases is dependent on payment of interest and principal on its notes receivable from EME.

As of December 31, 2008, Midwest Generation had $475 million of long-term debt and $911 million in lease financings. During 2000, Midwest Generation loaned $1.367 billion to EME from the proceeds of the sale-leaseback of the Powerton and Joliet plants. The debt service payments made by EME on the intercompany notes evidencing this loan are used by Midwest Generation to make the lease payments under the Powerton and Joliet leases. Midwest Generation's ability to meet its obligations under the leases is partially dependent on receiving payment on these intercompany notes. There is no assurance that EME will have sufficient cash flow to meet its obligations under the intercompany notes or make payments on the EME guarantees of the Powerton and Joliet leases. A default by EME in the payment of these intercompany notes would result in a shortfall of cash available to Midwest Generation to meet its lease and debt obligations. A default by Midwest Generation in meeting its lease obligations could give rise to various remedies, including the right to terminate the Powerton and Joliet leases, which would result in the loss of revenues from the Powerton and Joliet power plants and would have a material adverse effect on Midwest Generation's business, results of operations and financial condition.

The creditworthiness of Midwest Generation's customers, suppliers, transporters and other business partners could affect Midwest Generation's business and operations.

Midwest Generation is exposed to risks associated with the creditworthiness of its key customers, suppliers and business partners, many of whom may be adversely affected by the current conditions in the financial markets. Deterioration in the financial condition of Midwest Generation's counterparties increases the possibility that Midwest Generation may incur losses from the failure of counterparties to perform according to the terms of their contractual arrangements.

Midwest Generation's operations depend on contracts for the supply and transportation of fuel and other services required for the operation of its generation facilities and are exposed to the risk that counterparties to contracts will not perform their obligations. If a fuel supplier or transporter failed to perform under a contract, Midwest Generation would need to obtain alternate supplies or transportation, which could result in higher costs or disruptions in its operations. If the defaulting counterparty is in poor financial condition, damages related to a breach of contract may not be recoverable. Accordingly, the failure of counterparties to fulfill their contractual obligations could have a material adverse effect on Midwest Generation's financial results.

The accounting for Midwest Generation's hedging activities may increase the volatility of its quarterly and annual financial results.

EMMT, on behalf of Midwest Generation, engages in hedging activities in order to mitigate Midwest Generation's exposure to market risk with respect to electricity sales from its generation facilities, fuel utilized by those facilities and emission allowances. EMMT generally attempts to balance its fixed-price physical and financial purchases and sales commitments in terms of contract volumes and the timing of performance and delivery obligations through the use of financial and physical derivative contracts. These derivative contracts are recorded on Midwest Generation's balance sheet at fair value pursuant to SFAS No. 133. Some of these derivative contracts do not qualify under SFAS No. 133 for hedge accounting, and changes in their fair value are therefore recognized currently in earnings as unrealized gains or losses. As a result, Midwest Generation's financial results will at times be volatile and subject to fluctuations in value primarily due to changes in electricity prices.

As of December 31, 2008, Midwest Generation owned a fee interest in the Illinois Plants, with the exception of the Powerton Station and the Joliet Units 7 and 8, as more particularly described below. In December 1999, Commonwealth Edison sold only a portion of its then owned properties related to the Illinois Plants to Midwest Generation and retained the remaining portions of the properties for its own uses. Midwest Generation and Commonwealth Edison have various reciprocal permanent and temporary easements over Midwest Generation's respective parcels for the location, use, maintenance and repair of those facilities and equipment that are used in connection with the operations of Midwest Generation and Commonwealth Edison. On December 30, 2004, Midwest Generation acquired additional property adjacent to the Collins Station from Commonwealth Edison in exchange for easements Midwest Generation granted to Commonwealth Edison at the Will County, Joliet and Powerton Stations.

In conjunction with the sale-leaseback of the Powerton Station and Joliet Units 7 and 8 in August 2000, Midwest Generation leased substantially all the property on which the generating units are located to the owner trusts under site leases, and the owner trusts in turn subleased their undivided ground interest in the property back to Midwest Generation under site subleases. The terms of the site subleases are 33.75 years for the Powerton property and 30 years for the Joliet property, with renewal options. Rent is paid on each January 2 and July 2.

Operating Plant or Site		Location

Electric Generating Facilities
	Crawford Station	Chicago, Illinois	owned	coal	532
	Fisk Station	Chicago, Illinois	owned	coal	326
	Joliet Unit 6	Joliet, Illinois	owned	coal	290
	Joliet Units 7 and 8	Joliet, Illinois	leased	coal	1,036
	Powerton Station	Pekin, Illinois	leased	coal	1,538
	Waukegan Station	Waukegan, Illinois	owned	coal	689	(1)
	Will County Station	Romeoville, Illinois	owned	coal	1,060	(2)
Peaking Units
	Fisk	Chicago, Illinois	owned	oil/gas	197
	Waukegan	Waukegan, Illinois	owned	oil/gas	108

Total					5,776

Other Plant or Site
	Collins Station(3)	Grundy County, Illinois
	Crawford peaker(4)	Chicago, Illinois
	Joliet peaker(5)	Joliet, Illinois
	Calumet peaker(5)	Chicago, Illinois
	Electric Junction peaker(5)	Aurora, Illinois
	Lombard peaker(5)	Lombard, Illinois
	Sabrooke peaker(5)	Rockford, Illinois

On August 3, 2007, Midwest Generation received an NOV from the US EPA alleging that, beginning in the early 1990's and into 2003, Midwest Generation or Commonwealth Edison performed repair or replacement projects at six Illinois coal-fired electric generating stations in violation of the Prevention of Significant Deterioration requirements and of the New Source Performance Standards of the CAA, including alleged requirements to obtain a construction permit and to install best available control

technology at the time of the projects. The US EPA also alleges that Midwest Generation and Commonwealth Edison violated certain operating permit requirements under Title V of the CAA. Finally, the US EPA alleges violations of certain opacity and particulate matter standards at the Illinois Plants. The NOV does not specify the penalties or other relief that the US EPA seeks for the alleged violations. Midwest Generation, Commonwealth Edison, the US EPA and the DOJ are in talks designed to explore the possibility of a settlement. If the settlement talks fail and the DOJ files suit, litigation could take many years to resolve the issues alleged in the NOV. Midwest Generation cannot predict the outcome of this matter or estimate the impact on its facilities, its results of operations or financial position.

On August 13, 2007, Midwest Generation and Commonwealth Edison received a letter signed by several Chicago-based environmental action groups stating that, in light of the NOV, the groups are examining the possibility of filing a citizen suit against Midwest Generation and Commonwealth Edison based presumably on the same or similar theories advanced by the US EPA in the NOV.

By letter dated August 8, 2007, Commonwealth Edison advised Midwest Generation that Commonwealth Edison believes it is entitled to indemnification for all liabilities, costs, and expenses that it may be required to bear as a result of the NOV. By letter dated August 16, 2007, Commonwealth Edison tendered a request for indemnification to Midwest Generation for all liabilities, costs, and expenses that Commonwealth Edison may be required to bear if the environmental groups were to file suit. Midwest Generation and Commonwealth Edison are cooperating with one another in responding to the NOV.

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

All the outstanding membership interest of Midwest Generation is, as of the date hereof, owned by Edison Mission Midwest Holdings Co., which is an indirect wholly owned subsidiary of Edison International. There is no market for Midwest Generation's membership interest.

Distributions on the membership interest will be paid when declared by Midwest Generation's board of managers. Midwest Generation paid cash distributions to Edison Mission Midwest Holdings totaling $206 million in 2008, $660 million in 2007 and $542 million in 2006.

The selected financial data was derived from Midwest Generation's audited financial statements and is qualified in its entirety by the more detailed information and financial statements, including the notes to the financial statements, included in this annual report.

		Years Ended December 31,

		2008			2007			2006			2005			2004
		(in millions)
INCOME STATEMENT DATA
Operating revenues from marketing affiliate		$	1,778		$	1,579		$	1,399		$	1,429		$	1,058
Operating expenses
	Fuel and plant operations		915			804			737			672			760
	Depreciation and amortization		147			140			142			141			170
	(Gain) on buyout of contract, loss on lease termination, asset impairment and other charges and credits(1)		(16	)		5			12			4			106
	Administrative and general		22			22			19			20			21

			1,068			971			910			837			1,057

Operating income			710			608			489			592			1
Interest and other income (expense)			50			(122	)		(83	)		(93	)		(138	)

Income (loss) before income taxes			760			486			406			499			(137	)
Provision (benefit) for income taxes			283			183			159			197			(58	)

Income (loss) before accounting change			477			303			247			302			(79	)
Cumulative effect of change in accounting, net of tax(2)			—			—			—			(1	)		—

Net income (loss)		$	477		$	303		$	247		$	301		$	(79	)

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

This MD&A contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These statements reflect Midwest Generation's current expectations and projections about future events based on Midwest Generation's knowledge of present facts and circumstances and assumptions about future events and include any statement that does not directly relate to a historical or current fact. Other information distributed by Midwest Generation that is incorporated in this MD&A, or that refers to or incorporates this MD&A, may also contain forward-looking statements in this MD&A and elsewhere. In this MD&A and elsewhere, the words "expects," "believes," "anticipates," "estimates," "projects," "intends," "plans," "probable," "may," "will," "could," "would," "should," and variations of such words and similar expressions, or discussions of strategy or plans, are intended to identify forward-looking statements. Such statements necessarily involve risks and uncertainties that could cause actual results to differ materially from those anticipated. See "Forward-Looking Statements" and "Item 1A. Risk Factors" for a discussion of some of the risks, uncertainties and other important factors that could cause results to differ, or otherwise could impact Midwest Generation or its subsidiaries. Additional information about risks and uncertainties is contained throughout this MD&A. Readers are urged to read this entire annual report, including the information incorporated by reference, and carefully consider the risks, uncertainties and other factors that affect Midwest Generation's business. Forward-looking statements speak only as of the date they are made, and Midwest Generation is not obligated to publicly update or revise forward-looking statements. Readers should review future reports filed by Midwest Generation with the Securities and Exchange Commission.

This MD&A presents a discussion of Midwest Generation's financial results and analysis of its financial condition. It is presented in four sections:

Midwest Generation is a Delaware limited liability company formed on July 12, 1999 for the purpose of owning or leasing, making improvements to, and operating and selling the capacity and energy of, the power generation assets it purchased from Commonwealth Edison, which are referred to as the Illinois Plants.

Midwest Generation is currently operating 5,776 MW of power plants, based on installed capacity acknowledged by PJM, consisting of:

The energy and capacity from the Illinois Plants are sold under terms, including price and quantity, arranged by EMMT, an EME subsidiary engaged in the power marketing and trading business, with customers through a combination of bilateral agreements, forward energy sales and spot market sales. See "Market Risk Exposures" for further discussion of forward market prices.

Global financial markets are experiencing severe credit tightening and a significant increase in volatility, causing access to capital markets to become subject to increased uncertainty and borrowing costs to rise dramatically. In response, U.S. and foreign governments and central banks have intervened with programs designed to increase liquidity and restore confidence.

Midwest Generation is in a capital intensive business and depends on access to the financial markets to fund capital expenditures, meet contractual obligations and support collateral requirements. Midwest Generation has environmental compliance requirements as well as ongoing capital expenditures for its existing generation fleet. All of these activities require liquidity and access to capital markets at reasonable rates in the future. For further discussion, see "Liquidity and Capital Resources—Capital Expenditures."

Midwest Generation made borrowings under its credit agreement during 2008 to improve liquidity and protect against uncertainty resulting from the status of the financial markets. At December 31, 2008, Midwest Generation had consolidated cash and cash equivalents of $650 million. Although Midwest Generation does not have any material debt obligations that mature until 2012, Midwest Generation's projected capital expenditures require liquidity and access to capital markets in the future.

Disruptions in the capital markets affected in 2008, and may continue to affect, Midwest Generation's ability to finance future capital expenditures and how Midwest Generation addresses its commitments with respect to environmental compliance, as discussed below. Furthermore, disruption in the financial markets appears to have reduced trading activity in power markets which may affect the level and duration of future hedging activity and potentially increase the volatility of earnings. Long-term disruption in the capital markets could adversely affect Midwest Generation's business plans and financial position.

The market price for merchant energy in PJM increased significantly during the first half of 2008 and then decreased significantly in the second half of the year. The average 24-hour PJM market price for energy per MWh at the Northern Illinois Hub was higher in 2008 as compared to 2007 by 7.6%. However, since June 30, 2008, forward energy prices in PJM have decreased substantially driven by lower natural gas prices and the financial market developments discussed above. At December 31, 2008, forward energy market prices for 2009 for the Northern Illinois Hub have decreased by 38% since June 30, 2008. At the same time, Midwest Generation's average cost of fuel per MWh increased in 2008 by 16%. At December 31, 2008, Midwest Generation had contracted for substantially all of its coal requirements for 2009. Unless these energy prices change, energy gross margins for unhedged volumes from Midwest Generation will decrease from 2008. See "Market Risk Exposures—Commodity Price Risk" for further discussion.

The content of potential climate change regulation in the future remains uncertain. While debate continues at the national level over domestic climate policy and the appropriate scope and terms of any federal legislation, many states are developing state-specific measures or participating in regional legislative initiatives to reduce GHG emissions. State and regional regulations may vary and may be more stringent and costly than federal legislative proposals currently being debated in the U.S. Congress. Key uncertainties include whether a cap-and-trade program will be implemented similar to the US EPA Acid Rain Program, and, if implemented, whether emission allowances would be provided to affected parties without cost for a period of time. In the absence of legislation, it is also possible that CO₂ will be regulated by the US EPA pursuant to authority granted under the CAA in its current form. Furthermore, the rate of decrease in GHG emissions and the cost to purchase allowances would be significant factors in determining whether environmental controls for other emissions would be economic to install. Programs to reduce GHG emissions could significantly increase the cost of generating electricity from fossil fuels as well as the cost of purchased power. The potential impact on Midwest Generation will depend upon how the factors discussed above and many other considerations are resolved.

On December 11, 2006, Midwest Generation entered into an agreement with the Illinois EPA to reduce mercury, NO_X and SO₂ emissions at the Illinois Plants. The agreement has been embodied in an Illinois rule called the CPS. All of Midwest Generation's Illinois coal-fired electric generating units are subject to the CPS.

Under the CPS, Midwest Generation is required to achieve specific lower emission rates by specified dates. Midwest Generation has not decided upon a particular combination of retrofits to meet the required step down in emission rates. Midwest Generation continues to review alternatives, including interim compliance solutions. The CPS also specifies that specific control technologies are to be installed on some units by specified dates. In these cases, Midwest Generation must either install the required technology by the specified deadline or shut down the unit.

Midwest Generation is in the process of completing engineering work for the potential installation of SCR equipment on Units 5 and 6 at the Powerton Station and SNCR equipment on Unit 6 at the Joliet Station. The SCR equipment at the Powerton Station is currently estimated to cost $500 million, and the SNCR equipment on Unit 6 at the Joliet Station is currently estimated to cost $13 million (both figures are in 2008 dollars). This technology combination represents one possible compliance plan for the NO_X emission rates. Midwest Generation is evaluating other potential solutions that are less costly to meet the NO_X emissions rate that combine the use of alternative NO_X removal technologies with certain unit shutdowns.

The engineering work at the Powerton Station also includes the potential installation of FGD equipment on Units 5 and 6, and Midwest Generation currently estimates approximately $1 billion (in 2008 dollars) of capital expenditures would be required for the FGD equipment at the Powerton Station. Midwest Generation also determined these capital expenditures could be reduced if the construction work sequence of FGD and SCR at the Powerton Station were reversed. The complexity of the Powerton Station installation and construction interferences are representative of the balance of the fleet and Midwest Generation currently estimates approximately $650/kW for any FGD installation it elects to make on other units.

A decision to make these improvements has not been made. Midwest Generation is still evaluating all technology and unit shutdown combinations, including interim and alternative compliance solutions. For further discussion, see "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations."

On October 26, 2007, the Illinois EPA filed a proposed rule with the Illinois PCB that would establish more stringent thermal and effluent water quality standards for the Chicago Area Waterway System and Lower Des Plaines River. Midwest Generation's Fisk, Crawford and Will County Stations all use water from the Chicago Area Waterway System and its Joliet Station uses water from the Lower Des Plaines River for cooling purposes. The rule, if implemented, is expected to affect the manner in which those stations use water for station cooling.

The proposed rule is the subject of an administrative proceeding before the Illinois PCB and must be approved by the Illinois PCB and the Illinois Joint Committee on Administrative Rules. Following state adoption and approval, the US EPA also must approve the rule. Hearings began on January 28, 2008, and are continuing in 2009. Midwest Generation is a party in those proceedings. At this time, it is not possible to predict the timing for resolution of the proceeding, the final form of the rule, or how it would impact the operation of the affected stations; however, significant capital expenditures may be required depending on the form of the final rule. In addition, the outcome of these proceedings may affect Midwest Generation's plans for compliance with the CPS discussed above.

Midwest Generation's net income increased $174 million in 2008, compared to 2007. During 2007, Midwest Generation recorded a $79 million after-tax charge related to early extinguishment of debt. Excluding this charge, net income increased $95 million in 2008, compared to 2007, primarily attributable to:

The increases were partially offset by an increase in maintenance and repair costs due to planned and unplanned outages, and lower sales of emission allowances during the current year.

Two factors are expected to increase operating expenses by approximately $90 million to $105 million during 2009 as compared to 2008:

See "Results of Operations" for further discussion of Midwest Generation's operating results.

The accounting policies described below are viewed by management as "critical" because their correct application requires the use of material judgments and estimates, and they have a material impact on Midwest Generation's results of operations and financial position.

Midwest Generation uses derivative financial instruments for hedging activities for non-trading purposes. Derivative financial instruments are mainly utilized by Midwest Generation to manage exposure from changes in electricity and fuel prices. Midwest Generation follows SFAS No. 133, which requires derivative financial instruments to be recorded at their fair value unless an exception applies. SFAS No. 133 also requires that changes in a derivative's fair value be recognized currently in earnings unless specific hedge accounting criteria are met. For derivatives that qualify for hedge accounting, depending on the nature of the hedge, changes in fair value are either offset by changes in the fair value of the hedged assets, liabilities or firm commitments through earnings, or recognized in other comprehensive income until the hedged item is recognized in earnings. The ineffective portion of a derivative's change in fair value is immediately recognized in earnings. The remaining gain or loss on the derivative instrument, if any, is recognized currently in earnings. For further discussion, see "Market Risk Exposures—Accounting for Energy Contracts."

Management's judgment is required to determine if a transaction meets the definition of a derivative and, if it does, whether the normal sales and purchases exception applies or whether individual transactions qualify for hedge accounting treatment. The majority of Midwest Generation's long-term power sales and fuel supply agreements related to its generation activities either: (1) do not meet the definition of a derivative, or (2) qualify as normal purchases and sales and are, therefore, recorded on an accrual basis. Determining the fair value of derivatives under SFAS No. 133 is a critical accounting policy because the fair value of a derivative is susceptible to significant change resulting from a number of factors, including: volatility of energy prices, credit risks, market liquidity and discount rates. See "Market Risk Exposures" for a description of risk management activities and sensitivities to change in market prices.

Midwest Generation follows SFAS No. 157 which established a framework for measuring fair value. SFAS No. 157 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants as of the measurement date (referred to as an "exit price" in SFAS No. 157). Midwest Generation's assets and liabilities carried at fair value primarily consist of derivative contracts and money market funds. Derivative contracts primarily relate to power and include contracts for forward physical sales and purchases, options and forward price swaps

which settle only on a financial basis (including futures contracts). Derivative contracts can be exchange traded, over-the-counter traded or structured transactions.

Midwest Generation makes estimates and significant judgments in order to determine the fair value of an instrument including those related to quoted market prices, time value of money, volatility of the underlying commodities, non-performance risks and other factors. If quoted market prices are not available, internally maintained models are used to determine the fair value. Under SFAS No. 157, when actual market prices, or relevant observable inputs are not available it is appropriate to use unobservable inputs which reflect management assumptions, including extrapolating limited short-term observable data and developing correlations between liquid and non-liquid trading hubs. In assessing non-performance risks, Midwest Generation reviews credit ratings of counterparties (and related default rates based on such credit ratings) and prices of credit default swaps. The market price (or premium) for credit default swaps represents the price that a counterparty would pay to transfer the risk of default, typically bankruptcy, to another party. A credit default swap is not directly comparable to the credit risks of derivative contracts, but provides market information of the related risk of non-performance.

In addition, SFAS No. 157 established a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). See "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 2. Fair Value Measurements" for further information.

Level 3 includes primarily derivatives that trade infrequently (such as financial transmission rights and over-the-counter derivatives at illiquid locations) and derivatives with counterparties that have significant non-performance risks. For illiquid financial transmission rights, Midwest Generation reviews objective criteria related to system congestion on a quarterly basis and other underlying drivers and adjusts fair value when Midwest Generation concludes a change in objective criteria would result in a new valuation that better reflects the fair value. Changes in fair values are based on the hypothetical sale of illiquid positions. In circumstances where Midwest Generation cannot verify fair value with observable market transactions, it is possible that a different valuation model could produce a materially different estimate of fair value. As markets continue to develop and more pricing information becomes available, Midwest Generation continues to assess valuation methodologies used to determine fair value.

Midwest Generation follows SFAS No. 144, "Accounting for the Impairment or Disposal of Long-Lived Assets" (SFAS No. 144). Midwest Generation evaluates long-lived assets whenever indicators of impairment exist. This accounting standard requires that if the undiscounted expected future cash flow from a company's assets or group of assets (without interest charges) is less than its carrying value, asset impairment must be recognized in the financial statements. The amount of impairment is determined by the difference between the carrying amount and fair value of the asset.

The assessment of impairment is a critical accounting estimate because significant management judgment is required to determine: (1) if an indicator of impairment has occurred, (2) how assets should be grouped, (3) the forecast of undiscounted expected future cash flow over the asset's estimated useful life to determine if an impairment exists, and (4) if an impairment exists, the fair value of the asset or asset group. Factors that Midwest Generation considers important, which could trigger an impairment, include operating losses from a project, projected future operating losses, the financial condition of counterparties, or significant negative industry or economic trends. The expected future undiscounted cash flow from Midwest Generation's assets or group of assets is a critical accounting policy

because: (1) estimates of future prices of energy and capacity in wholesale energy markets and fuel prices are susceptible to significant change, (2) uncertainties exist regarding the impact of existing and future environmental regulations, (3) the period of the forecast is over an extended period of time due to the length of the estimated remaining useful lives, and (4) the impact of an impairment on Midwest Generation's consolidated financial position and results of operations would be material.

Midwest Generation has regulatory requirements in Illinois to reduce SO₂ and NO_X emissions to target rates and to install specific environmental control equipment by specific dates for each coal unit (except Unit 6 at the Joliet Station) or it would be required to shut down the specified coal unit. See "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations" for further discussion regarding the CPS. No decision has been made to make such capital improvements. The decision to make capital improvements is dependent on a number of factors affecting the economic analysis and potential impact of further environmental regulations. If Midwest Generation were to decide not to install additional environmental control equipment and, instead, shut down an entire plant by the date required, the remaining estimated useful life of the plant would be shortened (thereby increasing the annual depreciation expense). The change in estimated useful life could trigger an impairment. If the undiscounted expected cash flow measured at a plant level was less than the net book value of the asset group, an impairment would be recognized. Midwest Generation includes allocated acquired emissions allowances as part of the asset group under SFAS No. 144. Midwest Generation's unit of account is at the plant level and, accordingly, the closure of a unit at a multi-unit site would not result in an impairment of property, plant and equipment unless such condition were to affect an impairment assessment on the entire plant.

In accordance with SFAS No. 5, "Accounting for Contingencies," Midwest Generation records loss contingencies when it determines that the outcome of future events is probable of occurring and when the amount of the loss can be reasonably estimated. These reserves are based on management judgment and estimates taking into consideration available information and are adjusted when events or circumstances cause these judgments or estimates to change. Midwest Generation provides disclosure for contingencies when there is a reasonable possibility that a loss or an additional loss may be incurred. Gain contingencies are recognized in the financial statements when they are realized. Actual amounts realized upon settlement of contingencies may be different than amounts recorded and disclosed and could have a significant impact on the liabilities, revenue and expenses recorded on the consolidated financial statements. See "Liquidity and Capital Resources—Contractual Obligations, Commitments and Contingencies—Contingencies," and "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations" for a discussion of contingencies and regulatory issues, respectively.

Midwest Generation agreed to reimburse Commonwealth Edison and Exelon Generation for 50% of specific asbestos claims pending as of February 2003 and related expenses less recovery of insurance costs, and agreed to a sharing arrangement for liabilities and expenses associated with future asbestos-related claims as specified in a supplemental agreement. See "Liquidity and Capital Resources—Contractual Obligations, Commitments and Contingencies—Guarantees and Indemnities—Indemnity Provided as Part of the Acquisition from Commonwealth Edison." The estimated liability is based on studies that estimate future losses based on claims experience and other available information. In calculating future losses, various assumptions were made, including, but not limited to, the settlement of future claims under the supplemental agreement with Commonwealth Edison as described above, the

distribution of exposure sites and that the filing date of asbestos claims will not be after 2044. At December 31, 2008, Midwest Generation had recorded a liability of $52 million related to this contract indemnity.

SFAS No. 109, "Accounting for Income Taxes," requires the asset and liability approach for financial accounting and reporting for deferred income taxes. Midwest Generation uses the asset and liability method of accounting for deferred income taxes and provides deferred income taxes for all significant income tax temporary differences. Financial Accounting Standards Interpretation No. 48, "Accounting for Uncertainty in Income Taxes," (FIN No. 48) clarified the accounting for uncertain tax positions. FIN No. 48 (adopted on January 1, 2007) requires an enterprise to recognize, in its financial statements, the best estimate of the impact of a tax position by determining if the weight of the available evidence indicates it is more likely than not, based solely on the technical merits, that the position will be sustained on audit. Management continues to monitor and assess new income tax developments. See "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 7. Income Taxes" for additional details.

As part of the process of preparing its consolidated financial statements, Midwest Generation is required to estimate its income taxes in each jurisdiction in which it operates. This process involves estimating actual current tax exposure together with assessing temporary differences resulting from differing treatment of items, such as depreciation, for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included within Midwest Generation's balance sheet. In addition, estimated taxes for uncertain tax positions are accrued and included in accrued liabilities or other long-term liabilities in the balance sheet. Income tax expense includes the current tax liability from operations and the change in deferred income taxes during the year. Accounting for tax obligations requires judgments, including estimating reserves for potential adverse outcomes regarding tax positions that have been taken. Management uses judgment in determining whether the evidence indicates it is more likely than not, based solely on the technical merits, that the position will be sustained on audit.

For additional information regarding Midwest Generation's accounting policies, see "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 1. Summary of Significant Accounting Policies."

The table below summarizes total revenues as well as key performance measures related to coal-fired generation, which represents the majority of Midwest Generation's operations.

			Years Ended December 31

			2008		2007		2006
Operating Revenues (in millions)			$	1,778	$	1,579	$	1,399
Statistics
	Generation (in GWh):
		Energy only contracts		26,010		22,503		28,898
		Load requirements services contracts(1)		5,090		7,458		—

		Total		31,100		29,961		28,898

	Aggregate plant performance:
		Equivalent availability(2)		81.0%		75.8%		79.3%
		Capacity factor(3)		64.8%		60.9%		58.8%
		Load factor(4)		80.0%		80.4%		74.1%
		Forced outage rate(5)		8.3%		9.7%		7.9%
	Average realized price/MWh:
		Energy only contracts(6)	$	51.82	$	48.79	$	46.19
		Load requirements services contracts(7)	$	62.64	$	63.43	$	—
	Capacity revenue only (in millions)		$	111	$	27	$	24
	Average fuel costs/MWh		$	15.49	$	13.36	$	13.19

		Years Ended December 31,

		2008			2007			2006
		(in millions)
Operating revenues		$	1,778		$	1,579		$	1,399
Less:
	Load requirements services contracts		(319	)		(473	)		—
	Unrealized losses (gains)		6			25			(30	)
	Capacity and other revenues		(117	)		(33	)		(34	)

Realized revenues		$	1,348		$	1,098		$	1,335

Generation (in GWh)			26,010			22,503			28,898
Average realized energy price/MWh		$	51.82		$	48.79		$	46.19

Operating revenues increased $199 million in 2008 compared to 2007 and $180 million in 2007 compared to 2006. The 2008 increase was primarily due to higher capacity and energy revenues. The increase in capacity revenues was attributable to higher capacity prices as a result of the PJM RPM auctions. The increase in energy revenues was attributable to higher generation at slightly higher average realized energy prices. The 2008 operating revenues were also favorably impacted by the timing of unrealized gains and losses related to hedge contracts as described below.

Included in operating revenues were unrealized gains (losses) of $(6) million, $(25) million and $30 million in 2008, 2007 and 2006, respectively. In 2008, unrealized losses included $24 million from power contracts for 2009 and 2010 with Lehman Brothers Commodity Services, Inc. These contracts qualified as cash flow hedges under SFAS No. 133 until Midwest Generation dedesignated the contracts due to non-performance risk and subsequently terminated the contracts. The change in fair value was recorded as an unrealized loss during 2008. Unrealized gains (losses) were also attributable to the ineffective portion of forward and futures contracts which are derivatives that qualify as cash flow hedges under SFAS No. 133 and power contracts that did not qualify for hedge accounting under SFAS No. 133 (sometimes referred to as economic hedges). These energy contracts were entered into to hedge the price risk related to projected sales of power. During 2007, power prices increased, resulting in mark-to-market losses on economic hedges. See "Market Risk Exposures—Commodity Price Risk" and "Market Risk Exposures—Accounting for Energy Contracts" for more information.

On December 18, 2007, Unit 6 at the Powerton Station had a duct failure resulting in a suspension of operations at this unit through February 12, 2008. Scheduled maintenance work for the spring of 2008 was accelerated to minimize the aggregate impact of the outage. The duct failure resulted in claims under Midwest Generation's property and business interruption insurance policies. During the first quarter of 2008, $6 million related to business interruption insurance coverage was recorded primarily related to these claims reflected in interest and other income on Midwest Generation's consolidated statements of income. At December 31, 2008, Midwest Generation had a $4 million receivable recorded related to these claims.

Due to higher electric demand resulting from warmer weather during the summer months and cold weather during the winter months, electric revenues from the Illinois Plants vary substantially on a seasonal basis. In addition, maintenance outages generally are scheduled during periods of lower projected electric demand (spring and fall) further reducing generation and increasing major maintenance costs which are recorded as an expense when incurred. Accordingly, earnings from the Illinois Plants are seasonal and have significant variability from quarter to quarter. Seasonal fluctuations may also be affected by changes in market prices. See "Market Risk Exposures—Commodity Price Risk—Energy Price Risk" for further discussion regarding market prices.

Operating expenses increased $97 million in 2008 from 2007 and $61 million in 2007 from 2006. Operating expenses consist of fuel, gain on the sale of emission allowances, plant operations, (gain) from buyout of contract and (gain) loss on sale of assets, depreciation and amortization, and administrative and general expenses. The change in the components of operating expenses is discussed below.

Fuel expenses increased $82 million in 2008 from 2007 and $18 million in 2007 from 2006. The 2008 increase was primarily attributable to higher contracted coal prices, higher transportation costs due to cost escalations included in contracts, and higher generation as compared to 2007. The 2007 increase was primarily attributable to higher coal consumption in 2007, as compared to 2006, resulting from higher generation.

Gain on sale of emission allowances was $1 million, $16 million and $14 million for the years ended December 31, 2008, 2007 and 2006, respectively. Midwest Generation sold excess SO₂ emission allowances primarily to affiliates in all three years. In 2008, Midwest Generation sold less emission allowances at lower prices. In 2007 and 2006, the change in sales of SO₂ emission allowances was primarily attributable to changes in prices. The average price Midwest Generation received for the sale of SO₂ emission allowances was $343 per ton in 2008, $538 per ton in 2007 and $475 per ton in 2006.

Plant operations expenses increased $14 million in 2008 from 2007 and $51 million in 2007 from 2006. The 2008 increase was primarily attributable to increased planned and routine maintenance (including railcars), as well as higher costs related to forced outages as compared to 2007. The 2007 increase was primarily attributable to higher overhaul and planned maintenance costs in 2007, as compared to 2006. In 2007, Midwest Generation experienced forced outages at several stations, including unplanned outages at the Powerton Station, which resulted in a higher forced outage rate of 9.7% for 2007 as compared to 7.9% for 2006, and a lower equivalent availability factor of 75.8% for 2007 as compared to 79.3% for 2006. Some of the planned maintenance for 2008 was completed in 2007 during the outages to maximize future availability.

(Gain) on buyout of contract and (gain) loss on sale of assets of $16 million for 2008 includes a $15 million gain related to the buyout of a fuel contract. See "Liquidity and Capital Resources—Contractual Obligations and Contingencies—Fuel Supply Contracts" for further discussion. The $5 million loss for 2007 was primarily due to the write-off of the net book value of certain equipment at the Powerton and Joliet Stations. The $12 million loss for 2006 was primarily due to a $14 million write-off of the estimated net book value of some major components that were replaced in 2006, partially offset by a gain of $2 million on the sale of peaker equipment.

Depreciation and amortization expense increased $7 million in 2008 from 2007 and decreased $2 million in 2007 from 2006. During 2007, Midwest Generation sold excess SO₂ emission allowances

which resulted in lower depreciation expense, thereby affecting the year over year comparisons. In addition to this factor, the 2008 increase was attributable to an increase in assets being placed in service.

Interest and other income increased $8 million in 2008 from 2007. The 2008 increase was primarily due to $6 million recorded in other income in 2008 for business interruption coverage related to insurance claims from unplanned outages.

Interest expense decreased $38 million in 2008 from 2007 and $87 million in 2007 from 2006. The decreases were primarily due to repayment of debt in May 2007.

Loss on early extinguishment of debt for the year ended December 31, 2007 related to the early repayment of Midwest Generation's 8.75% second priority senior secured notes due May 1, 2034.

Midwest Generation had effective income tax provision rates of 37%, 38% and 39% in 2008, 2007 and 2006, respectively. Midwest Generation's effective income tax rate varies from the federal statutory rate of 35% primarily due to state income taxes and estimated benefits from a federal deduction related to qualified domestic production activities under Section 199 of the Internal Revenue Code.

Midwest Generation entered into a revolving credit agreement with EMMT, dated as of April 27, 2004, to provide credit support for forward contracts entered into by EMMT. Under this agreement, Midwest Generation can, from time to time, make revolving loans to, and have letters of credit issued on behalf of, EMMT. Midwest Generation had provided $54 million to EMMT as of December 31, 2007 and none as of December 31, 2008. Loans provided under this revolving credit agreement are repaid by EMMT upon the return of the funds under the terms of the related forward contract. The amount repaid includes interest earned, if any, under margining agreements supporting such contracts. Midwest Generation earned interest income of $1 million during 2008 and $2 million during each of 2007 and 2006. The maximum amount of available credit under the agreement is $500 million.

Midwest Generation has entered into a master purchase, sale and services agreement with EMMT, pursuant to which EMMT arranges for purchases and sales of the following products, including related services: (i) energy and capacity; (ii) natural gas; (iii) fuel oil; and (iv) emission allowances.

Midwest Generation compensates EMMT in accordance with the following table with respect to these transactions, and reimburses EMMT for brokers' fees, taxes, and other reasonably incurred direct out-of-pocket expenses. Payment for these services is due within 30 days of billing.

The net fees earned by EMMT were $2 million, $1 million and $1 million for the years ended December 31, 2008, 2007 and 2006, respectively. Midwest Generation had receivables due from EMMT of $143 million and $108 million at December 31, 2008 and 2007, respectively.

Midwest Generation also entered into several transactions through EMMT to sell surplus or purchase SO₂ and NO_X allowances. All transactions were completed at market price on the date of the transaction. Net consideration received (paid) by Midwest Generation was $(33) million, $(7) million and $7 million during 2008, 2007 and 2006, respectively.

Midwest Generation has entered into an agreement with Edison Mission Energy Services, Inc. to provide fuel and transportation services related to coal and fuel oil. Under the terms of this agreement, Midwest Generation paid a service fee of $.06 for each ton of coal delivered and $.05 for each barrel of fuel oil delivered, plus the actual cost of the commodities. The agreement terminated during 2006. The amount billable under this agreement for the service fee for the year ended December 31, 2006 was $1 million.

The proceeds received by Midwest Generation from the Powerton-Joliet sale-leaseback transaction were loaned to EME. The loan is evidenced by four intercompany notes amounting to $1.367 billion. EME is obligated to repay the principal on the notes in a series of installments on the dates and in the amounts set forth on a schedule to each note. EME has paid and is required to pay interest on the notes on each January 2 and July 2 at an 8.30% fixed interest rate. All amounts due under the notes are due to be repaid in full by January 2, 2016. Midwest Generation earned interest income of $112 million, $113 million and $113 million during 2008, 2007 and 2006, respectively.

Midwest Generation is included in the consolidated federal and state income tax returns of Edison International and is party to a tax-allocation agreement with its parent, Edison Mission Midwest Holdings. As long as Edison International continues to own, directly or indirectly, at least 80% of the voting power of the stock of EME and its existing subsidiaries and at least 80% of the value of such stock, Midwest Generation will be included in the consolidated federal and state income tax returns of Edison International. In accordance with the agreement and the tax-allocation procedures that have been in effect since Midwest Generation's formation, its current tax liability or benefit is generally determined on a separate return basis, except for calculating consolidated state income taxes, for which Midwest Generation uses the state tax apportionment factors of the Edison International group. Also, while

Midwest Generation is generally subject to separate return limitations for net losses, under the tax-allocation agreement it is permitted to transfer to Edison Mission Midwest Holdings, or its subsidiaries, net operating loss benefits which would not yet be realized in a separate return in exchange for a reduction in Midwest Generation's intercompany account balances (including subordinated loans). Amounts included on the balance sheet associated with this tax-allocation agreement totaled $20 million at December 31, 2008 included in due from affiliates and $63 million at December 31, 2007 included in due to affiliates.

Certain administrative services, such as payroll, employee benefit programs, insurance and information technology are shared among all affiliates of Edison International, and the costs of these corporate support services are allocated to all affiliates. The cost of services provided by Edison International and EME, including those related to Midwest Generation, are allocated based on one of the following formulas: percentage of the time worked, equity in investment and advances, number of employees, or multi-factor (operating revenues, operating expenses, total assets and total employees). Midwest Generation participates in a common payroll and benefit program with all Edison International employees. In addition, Midwest Generation is billed for any direct labor and out-of-pocket expenses for services directly requested for its benefit. Midwest Generation believes the allocation methodologies are reasonable. Midwest Generation made reimbursements for the cost of these programs and other services totaling $26 million, $28 million and $24 million for the years ended December 31, 2008, 2007 and 2006, respectively. Midwest Generation had a net payable of $4 million and $5 million at December 31, 2008 and 2007, respectively, due to Edison International.

Midwest Generation participates in the insurance program of Edison International, including property, general liability, workers compensation and various other specialty policies. Midwest Generation's insurance premiums are generally based on its share of risk related to each policy. In connection with the property insurance program, a portion of the risk is reinsured by a captive insurance subsidiary of Edison International.

Midwest Generation EME and Midwest Generation entered into a management and administration agreement pursuant to which Midwest Generation EME charges Midwest Generation for management and administrative services. Actual costs billable under this agreement for the years ended December 31, 2008, 2007 and 2006 were $16 million, $13 million and $12 million, respectively.

Midwest Generation has entered into an agreement with Midwest Generation EME for support services, including construction and construction management, operations and maintenance management, technical services and training, environmental, health and safety services, administrative and IT support, and other managerial and technical services needed to operate and maintain electric power facilities. Under the terms of the agreement, Midwest Generation reimburses Midwest Generation EME for actual costs incurred by functional area in providing support services, or in the case of specific tasks requested by Midwest Generation, the amount negotiated for the task. Actual costs billable under this agreement for the years ended December 31, 2008, 2007 and 2006 were $15 million, $10 million and $7 million, respectively.

Midwest Generation had payables of $4 million and $2 million due to Midwest Generation EME at December 31, 2008 and 2007 related to these agreements.

New accounting pronouncements are discussed in Note 1—Summary of Significant Accounting Policies—New Accounting Pronouncements under "Midwest Generation, LLC Notes to Consolidated Financial Statements."

The following discussion of liquidity and capital resources is organized in the following sections:

		Page

Midwest Generation's Liquidity			41
Consolidated Cash Flow			42
Capital Expenditures			43
Credit Facility and Other Covenants			43
Equity Distributions and Tax Payments			44
Powerton-Joliet Lease Payments			44
Credit Ratings			45
Contractual Obligations, Commitments and Contingencies			46
Off-Balance Sheet Transactions			50
Environmental Matters and Regulations			50

At December 31, 2008, Midwest Generation had cash and cash equivalents of $650 million and Midwest Generation had a total of $22 million of available borrowing capacity under its $500 million working capital facility.

The following table summarizes the status of Midwest Generation's working capital facility at December 31, 2008:

On September 15, 2008, Lehman Brothers Holdings filed for protection under Chapter 11 of the U.S. Bankruptcy Code. A subsidiary of Lehman Brothers Holdings, Lehman Brothers Commercial Bank, Inc., is one of the lenders in the Midwest Generation working capital facility. This subsidiary fully funded $42 million of Midwest Generation's borrowing requests, which remains outstanding. At December 31, 2008, Lehman Brothers Commercial Bank's share of the amount available to draw under the Midwest Generation working capital facility was $2 million.

Disruptions in the capital markets affected in 2008, and may continue to affect, Midwest Generation's ability to finance future capital expenditures. Access to the capital markets has become subject to increased uncertainty due to the financial market and economic conditions discussed in "Management's Overview; Critical Accounting Policies and Estimates—Management's Overview." Accordingly, Midwest Generation's liquidity is currently comprised of cash on hand, cash flow generated from operations, and payments by EME under the intercompany notes issued in connection with the Powerton-Joliet facilities sale-leaseback.

Midwest Generation has entered into hedge contracts directly with third parties that provide a lien on Midwest Generation's assets in lieu of margining. The hedge contracts require Midwest Generation to comply with the terms and conditions of its credit facility, including financial covenants that are described further in "—Credit Facility and Other Covenants." Furthermore, the hedge contracts include provisions relating to a change in control or material adverse effect resulting from amendments or modifications to the related credit facility. Failure of Midwest Generation to comply with these provisions would result in a termination event under the hedge contracts, enabling the counterparties to terminate and liquidate all outstanding transactions and demand immediate payment of amounts owed to them. The aggregate fair value of hedge contracts with credit-risk related contingent features was a net asset at December 31, 2008 and, accordingly, the contingent features described above do not currently have a liquidity exposure. Future increases in power prices could expose Midwest Generation to termination payments or posting additional collateral under the contingent features described above. Midwest Generation received collateral deposits of $59 million from counterparties under these contracts at December, 31, 2008.

At December 31, 2008, Midwest Generation had cash and cash equivalents of $650 million, compared to $65 million at December 31, 2007. Net working capital at December 31, 2008 was $813 million, compared to $20 million at December 31, 2007. The increase in working capital was primarily attributable to higher cash equivalent balances as a result of drawdowns in the third quarter of 2008 on Midwest Generation's working capital facility.

Net cash provided by operating activities totaled $545 million, $732 million and $874 million in 2008, 2007 and 2006, respectively. The changes in net cash provided by operating activities has been largely attributable to the changes in Midwest Generation's loan to affiliate for margin deposits, which provided (used) cash of $54 million in 2008, $(10) million in 2007 and $284 million in 2006. In 2007 and 2006 there were also declines in net amounts due from affiliates, which also contributed to cash provided from operating activities in those years. The 2008 decrease was primarily due to tax payments to its affiliate of $349 million in 2008 and the purchase of additional NO_X emission allowances, partially offset by collateral deposits received under hedge contracts.

Net cash provided by (used in) financing activities totaled $150 million, $(824) million and $(819) million in 2008, 2007 and 2006, respectively. The 2008 change was primarily due to net borrowings of $475 million in 2008 as compared to $56 million in 2007 and Midwest Generation's lower distributions to its parent in 2008 of $206 million as compared to $660 million in 2007. In addition, Midwest Generation paid $109 million of fees related to the early extinguishment of debt in 2007. In 2007, Midwest Generation received a $1.4 billion contribution from its parent which was used to repay $1.3 billion of long-term debt and tender premiums and related fees of $107 million. In addition, Midwest Generation made distributions of $660 million to its parent from cash generated from operations and repaid $111 million of its capital lease obligation. In 2006, Midwest Generation made distributions of $542 million to its parent, repaid $170 million under its working capital facility, and repaid $104 million of its capital lease obligation.

Net cash used in investing activities totaled $110 million, $14 million and $8 million in 2008, 2007 and 2006, respectively. The 2008 increase in cash used in investing activities was primarily due to an increase in capital expenditures and lower sales of SO₂ emission allowances. The 2007 increase in cash

used in investing activities was primarily due to an increase in capital expenditures, partially offset by an increase in the proceeds received from the sale of SO₂ emission allowances.

At December 31, 2008, the estimated capital expenditures through 2011 by Midwest Generation were as follows:

Plant capital expenditures relate to non-environmental projects such as boiler components, mill steam inerting projects, generator stator rewinds, 4Kv switchgear, and main power transformer replacement.

As discussed above, Midwest Generation is subject to various commitments with respect to environmental compliance. Midwest Generation is in the process of completing engineering work for the potential installation of SCR and FGD equipment on Units 5 and 6 at the Powerton Station and SNCR equipment on Unit 6 at the Joliet Station. If a decision was made to proceed with these improvements the estimated capital costs (in 2008 dollars) would be approximately:

Midwest Generation has determined that these capital expenditures could be reduced if the construction work sequence of FGD and SCR at the Powerton Station were reversed. The complexity of the Powerton Station installation and construction interferences are representative of the balance of the fleet and Midwest Generation currently estimates approximately $650/kW for any FGD installation it elects to make on other units.

A decision to make these improvements has not been made. Midwest Generation is still reviewing all technology and unit shutdown combinations, including interim and alternative compliance solutions. For further discussion of environmental regulations and current status of environmental improvements in Illinois, see "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations."

Midwest Generation maintains a $500 million working capital facility that matures in 2012, with an option to extend for up to two years. The interest rate on borrowings outstanding under this credit facility is LIBOR + 0.55%, except if average utilized commitments during a period exceed $250 million, in which case the margin increases to 0.65%, which was the case at December 31, 2008. As of December 31, 2008, Midwest Generation had $475 million of borrowings outstanding and $3 million of letters of credit had been utilized under this working capital facility. Midwest Generation's weighted average interest rate was 2.34% at December 31, 2008.

Midwest Generation is bound by the covenants in its credit agreement and certain covenants under the Powerton-Joliet lease documents with respect to Midwest Generation making payments under the leases. These covenants include restrictions on the ability to, among other things, incur debt, create liens on its property, merge or consolidate, sell assets, make investments, engage in transactions with affiliates, make distributions, make capital expenditures, enter into agreements restricting its ability to make distributions, engage in other lines of business, enter into swap agreements, or engage in transactions for any speculative purpose. In order for Midwest Generation to make a distribution, it must be in compliance with the covenants specified under its credit agreement, including maintaining a debt to capitalization ratio of no greater than 0.60 to 1. At December 31, 2008, the debt to capitalization ratio was 0.28 to 1.

The following table summarizes the payments by Midwest Generation as equity distributions through Edison Mission Midwest Holdings and payments made pursuant to tax-allocation agreements:

Prior to 2008, Midwest Generation did not make significant payments under its tax-allocation agreements due to losses principally related to the 2004 termination of the Collins Station lease and subsequent decommissioning of the plant. Beginning in 2008, Midwest Generation's federal and state tax payments were made in accordance with the tax-allocation agreements. For additional information on the tax-allocation agreements, see "Results of Operations—Related Party Transactions—Tax-Allocation Agreements."

As part of the sale-leaseback of the Powerton Station and Units 7 and 8 of the Joliet Station, Midwest Generation loaned the proceeds (in the original amount of $1.367 billion) to EME in exchange for promissory notes in the same aggregate amount. EME's obligations under the promissory notes payable to Midwest Generation are general corporate obligations of EME and are not contingent upon receiving distributions from its subsidiaries. There is no assurance that EME will have sufficient cash flow to meet these obligations. Furthermore, EME has guaranteed Midwest Generation's lease obligations under these leases. If EME fails to pay under its guarantee, including payments due under the Powerton-Joliet leases in the event that Midwest Generation could not make such payments, this would result in an event of default under the Powerton and Joliet leases. This event would have a material adverse effect on Midwest Generation.

Credit ratings for Midwest Generation, EME and EMMT, at December 31, 2008, were as follows:

On December 23, 2008, S&P assigned a negative outlook to its corporate ratings for Midwest Generation, EME and EMMT. Midwest Generation cannot provide assurance that the credit ratings above will remain in effect for any given period of time or that one or more of these ratings will not be lowered. Midwest Generation notes that these credit ratings are not recommendations to buy, sell or hold securities and may be revised at any time by a rating agency.

Midwest Generation sells merchant energy and capacity and purchases its natural gas through EMMT, which currently has a below investment grade credit rating. Midwest Generation currently has cash on hand to provide credit support as needed for hedging contracts entered into by EMMT related to the Illinois Plants.

EMMT borrows under its revolving credit agreement with Midwest Generation to provide credit support for futures and forward contracts. Loans provided under this revolving credit agreement are repaid by EMMT upon the return of the funds under the terms of the related forward contracts. The amount repaid includes interest earned, if any, under margining agreements supporting such contracts. As of December 31, 2008, EMMT had no borrowings outstanding under this revolving credit agreement.

Midwest Generation anticipates that sales of its power through EMMT may require additional credit support, depending upon market conditions and the strategies adopted for the sale of this power. Changes in forward market prices and margining requirements and increases in merchant sales could further increase the need for credit support related to hedging activities. Midwest Generation is able to provide collateral to support bilateral contracts for power and fuel to the extent that any such transactions relate to its merchant energy operations. Depending on market conditions and the volume and duration of forward sales, there is no assurance that Midwest Generation will be able to provide sufficient credit support to EMMT.

The following table summarizes Midwest Generation's significant contractual obligations as of December 31, 2008:

				Payments Due by Period (in millions)

Contractual Obligations		Total		Less than 1 year		1 to 3 years		3 to 5 years		More than 5 years
Long term debt(1)		$	520	$	13	$	26	$	481	$	—
Lease financing(2)			1,297		185		321		302		489
Operating lease obligations(3)			106		17		31		29		29
Purchase obligations:
	Capital improvements		52		52		—		—		—
	Calumet Energy Team contract		9		4		5		—		—
	Fuel supply contracts		358		227		131		—		—
	Coal transportation		396		236		160		—		—
	Other contractual obligations		173		31		86		56		—
Employee benefit plan contribution(4)			7		7		—		—		—

Total Contractual Obligations(5)		$	2,918	$	772	$	760	$	868	$	518

In August 2000, Midwest Generation entered into a sale-leaseback transaction with respect to the Powerton-Joliet power facilities to third-party lessors. For further discussion, See "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Lease Commitments—Powerton-Joliet Facilities Sale-Leaseback."

At December 31, 2008, Midwest Generation had firm commitments in 2009 for capital expenditures primarily related to boiler components, mill steam inerting projects, generator stator rewinds,

4kV switchgear, main power transformer and environmental improvements. These capital expenditures are planned to be financed by cash on hand and cash generated from operations.

At December 31, 2008, Midwest Generation had fuel purchase commitments with various third-party suppliers for the purchase of coal. The minimum commitments are based on the contract provisions, which consist of fixed prices, subject to adjustment clauses. In connection with the acquisition of the Illinois Plants, Midwest Generation had assumed a long-term coal supply contract and recorded a liability to reflect the fair value of this contract. In March 2008, Midwest Generation entered into an agreement to buy out its coal obligations for the years 2009 through 2012 under this contract with a one-time payment to be made in January 2009.

At December 31, 2008, Midwest Generation had contractual commitments for the purchase of materials for environmental controls equipment.

Midwest Generation has entered into interconnection agreements with Commonwealth Edison to provide interconnection services necessary to connect the Illinois Plants with its transmission systems. Unless terminated earlier in accordance with their terms, the interconnection agreements will terminate on a date mutually agreed to by both parties. Midwest Generation is required to compensate Commonwealth Edison for all reasonable costs associated with any modifications, additions or replacements made to the interconnection facilities or transmission systems in connection with any modification, addition or upgrade to the Illinois Plants.

In connection with the sale-leaseback transactions related to the Powerton and Joliet Stations and previously the Collins Station, EME, Midwest Generation and another wholly owned subsidiary of EME

entered into tax indemnity agreements. Although the Collins Station lease terminated in April 2004, Midwest Generation's tax indemnity agreement with the former lease equity investor is still in effect. Under these tax indemnity agreements, these entities agreed to indemnify the lessors in the sale-leaseback transactions for specified adverse tax consequences that could result in certain situations set forth in the tax indemnity agreement, including specified defaults under the respective leases. The potential indemnity obligation under these tax indemnity agreements could be significant. Due to the nature of these potential obligations, Midwest Generation cannot determine a maximum potential liability which would be triggered by a valid claim from the lessors. Midwest Generation has not recorded a liability related to these indemnities.

In connection with the acquisition of the Illinois Plants, Midwest Generation agreed to indemnify Commonwealth Edison with respect to specified environmental liabilities before and after December 15, 1999, the date of sale. The indemnification claims are reduced by any insurance proceeds and tax benefits related to such claims and are subject to a requirement that Commonwealth Edison takes all reasonable steps to mitigate losses related to any such indemnification claim. Due to the nature of the obligation under this indemnity, a maximum potential liability cannot be determined. This indemnification for environmental liabilities is not limited in term and would be triggered by a valid claim from Commonwealth Edison. Commonwealth Edison has advised Midwest Generation that Commonwealth Edison believes it is entitled to indemnification for all liabilities, costs, and expenses that it may be required to bear as a result of the NOV discussed below under "—Contingencies—New Source Review Notice of Violation" and potential litigation by private groups related to the NOV. Except as discussed below, Midwest Generation has not recorded a liability related to this indemnity.

Midwest Generation entered into a supplemental agreement with Commonwealth Edison and Exelon Generation on February 20, 2003 to resolve a dispute regarding interpretation of its reimbursement obligation for asbestos claims under the environmental indemnities set forth in the Asset Sale Agreement. Under this supplemental agreement, Midwest Generation agreed to reimburse Commonwealth Edison and Exelon Generation for 50% of specific asbestos claims pending as of February 2003 and related expenses less recovery of insurance costs, and agreed to a sharing arrangement for liabilities and expenses associated with future asbestos-related claims as specified in the agreement. As a general matter, Commonwealth Edison and Midwest Generation apportion responsibility for future asbestos-related claims based upon the number of exposure sites that are Commonwealth Edison locations or Midwest Generation locations. The obligations under this agreement are not subject to a maximum liability. The supplemental agreement had an initial five-year term with an automatic renewal provision for subsequent one-year terms (subject to the right of either party to terminate); pursuant to the automatic renewal provision, it has been extended until February 2010. There were approximately 222 cases for which Midwest Generation was potentially liable and that had not been settled and dismissed at December 31, 2008. Midwest Generation had recorded a $52 million liability at December 31, 2008 related to this matter.

Midwest Generation recorded an undiscounted liability for its indemnity for future asbestos claims through 2045. During the fourth quarter of 2007, the liability was reduced by $9 million based on updated estimated losses. In calculating future losses, various assumptions were made, including but not limited to, the settlement of future claims under the supplemental agreement with Commonwealth Edison as described above, the distribution of exposure sites, and that no asbestos claims will be filed after 2044.

The amounts recorded by Midwest Generation for the asbestos-related liability are based upon a number of assumptions. Future events, such as the number of new claims to be filed each year, the average cost of disposing of claims, as well as the numerous uncertainties surrounding asbestos litigation in the United States, could cause the actual costs to be higher or lower than projected.

On August 3, 2007, Midwest Generation received an NOV from the US EPA alleging that, beginning in the early 1990s and into 2003, Midwest Generation or Commonwealth Edison performed repair or replacement projects at six Illinois coal-fired electric generating stations in violation of the Prevention of Significant Deterioration requirements and of the New Source Performance Standards of the CAA, including alleged requirements to obtain a construction permit and to install best available control technology at the time of the projects. The US EPA also alleges that Midwest Generation and Commonwealth Edison violated certain operating permit requirements under Title V of the CAA. Finally, the US EPA alleges violations of certain opacity and particulate matter standards at the Illinois Plants. The NOV does not specify the penalties or other relief that the US EPA seeks for the alleged violations. Midwest Generation, Commonwealth Edison, the US EPA, and the DOJ are in talks designed to explore the possibility of a settlement. If the settlement talks fail and the DOJ files suit, litigation could take many years to resolve the issues alleged in the NOV. Midwest Generation cannot predict the outcome of this matter or estimate the impact on its facilities, its results of operations or financial position.

Midwest Generation has off-balance sheet activities related to operating leases in place for equipment, primarily leased railcars, with termination option dates in various years through 2020. See "—Contractual Obligations, Commitments and Contingencies" for Midwest Generation's minimum operating lease obligations.

See the discussion on environmental matters and regulations in Note 9—Commitments and Contingencies under "Midwest Generation, LLC Notes to Consolidated Financial Statements."

Midwest Generation's primary risk exposures are associated with the sale of electricity and capacity from, and the procurement of fuel for, its merchant power plants. These market risks arise from fluctuations in electricity, capacity and fuel prices, emission allowances, and transmission rights. Additionally, Midwest Generation's financial results can be affected by fluctuations in interest rates. Midwest Generation manages these risks in part by using derivative financial instruments in accordance with established policies and procedures.

This section discusses these market risk exposures under the following headings:

Midwest Generation sells all of its energy and capacity into wholesale power markets through EMMT. EMMT enters into forward contracts for Midwest Generation's electric output in order to provide more predictable earnings and cash flow. When appropriate, EMMT manages the spread between electric prices and fuel prices through the use of forward contracts, swaps, futures, or options contracts. There is no assurance that contracts to hedge changes in market prices will be effective.

Midwest Generation's operations expose it to commodity price risk, which represents the potential loss that can be caused by a change in the market value of a particular commodity. Commodity price risks are actively monitored by a risk management committee to ensure compliance with Midwest Generation's risk management policies, through EMMT. Policies are in place which define risk management processes, and procedures exist which allow for monitoring of all commitments and positions with regular reviews by a risk management committee. Despite this, there can be no assurance that all risks have been accurately identified, measured and/or mitigated.

In addition to prevailing market prices, Midwest Generation's ability to derive profits from the sale of electricity will be affected by the cost of production, including costs incurred to comply with environmental regulations. The costs of production of the units vary and, accordingly, depending on market conditions, the amount of generation that will be sold from the units is expected to vary.

EMMT uses "gross margin at risk" to identify, measure, monitor and control Midwest Generation's overall market risk exposure with respect to hedge positions at the Illinois Plants. The use of this measure allows management to aggregate overall commodity risk, compare risk on a consistent basis and identify the risk factors. Gross margin at risk measures the potential change in value of an asset or position, in each case over a given time interval, under normal market conditions, at a given confidence level. Given the inherent limitations of this measure and reliance on a single type of risk measurement

tool, EMMT supplements this approach with the use of stress testing and worst-case scenario analysis for key risk factors, as well as stop-loss triggers and counterparty credit exposure limits.

To reduce its exposure to market risk, Midwest Generation hedges a portion of its electricity sales through EMMT. To the extent that Midwest Generation does not hedge its electricity sales, the unhedged portion will be subject to the risks and benefits of spot market price movements. Hedge transactions are primarily implemented through:

The extent to which Midwest Generation hedges its market price risk depends on several factors. First, Midwest Generation evaluates over-the-counter market prices to determine whether the types of hedge transactions set forth above at forward market prices are sufficiently attractive compared to assuming the risk associated with fluctuating spot market sales. Second, Midwest Generation's ability to enter into hedging transactions depends upon its and EMMT's credit capacity and upon the forward sales markets having sufficient liquidity to enable Midwest Generation to identify appropriate counterparties for hedging transactions.

Midwest Generation is permitted to use its working capital facility and cash on hand to provide credit support for hedging transactions related to the Illinois Plants entered into by EMMT. Utilization of this credit facility in support of these hedging transactions provides additional liquidity support for implementation of Midwest Generation's contracting strategy for the Illinois Plants. In addition, Midwest Generation may grant liens on its property in support of hedging transactions associated with the Illinois Plants. See "—Credit Risk" below.

All the energy and capacity from the Illinois Plants is sold under terms, including price and quantity, arranged by EMMT with customers through a combination of bilateral agreements (resulting from negotiations or from auctions), forward energy sales and spot market sales. As discussed further below, power generated at the Illinois Plants is generally sold into the PJM market.

Midwest Generation sells its power into PJM at spot prices based upon locational marginal pricing. Hedging transactions related to the generation of the Illinois Plants are generally entered into at the Northern Illinois Hub or the AEP/Dayton Hub, both in PJM, or may be entered into at other trading hubs, including the Cinergy Hub in the MISO. These trading hubs have been the most liquid locations for hedging purposes. See "—Basis Risk" below for further discussion.

PJM has a short-term market, which establishes an hourly clearing price. The Illinois Plants are situated in the PJM control area and are physically connected to high-voltage transmission lines serving this market.

The following table depicts the average historical market prices for energy per megawatt-hour during 2008, 2007 and 2006:

	24-Hour Northern Illinois Hub Historical Energy Prices(1)

	2008		2007		2006
January	$	47.09	$	35.75	$	42.27
February		54.46		56.64		42.66
March		58.58		42.04		42.50
April		53.87		48.91		43.16
May		44.49		44.49		39.96
June		56.06		39.76		34.80
July		63.79		43.40		51.82
August		52.66		57.97		54.76
September		43.08		39.68		31.87
October		35.31		50.14		37.80
November		38.34		43.25		41.90
December		40.43		44.36		33.57

Yearly Average	$	49.01	$	45.53	$	41.42

Forward market prices at the Northern Illinois Hub fluctuate as a result of a number of factors, including natural gas prices, transmission congestion, changes in market rules, electricity demand (which in turn is affected by weather, economic growth, and other factors), plant outages in the region, and the amount of existing and planned power plant capacity. The actual spot prices for electricity delivered by the Illinois Plants into these markets may vary materially from the forward market prices set forth in the table below.

The following table sets forth the forward month-end market prices for energy per megawatt-hour for the calendar year 2009 and calendar year 2010 "strips," which are defined as energy purchases for the entire calendar year, as quoted for sales into the Northern Illinois Hub during 2008:

	24-Hour Northern Illinois Hub Forward Energy Prices(1)

	2009		2010
January 31, 2008	$	52.30	$	53.14
February 29, 2008		57.29		56.45
March 31, 2008		55.48		55.50
April 30, 2008		56.80		49.14
May 31, 2008		57.03		52.10
June 30, 2008		62.17		56.08
July 31, 2008		52.48		50.94
August 31, 2008		50.49		49.30
September 30, 2008		48.03		48.52
October 31, 2008		42.03		43.10
November 30, 2008		41.43		42.45
December 31, 2008		38.59		39.55

EMMT engages in hedging activities for the Illinois Plants to hedge the risk of future change in the price of electricity. Hedging activities for energy only contracts are typically weighted toward on-peak periods. The following table summarizes Midwest Generation's hedge position at December 31, 2008:

On June 1, 2007, PJM implemented the RPM for capacity. The purpose of the RPM is to provide a long-term pricing signal for capacity resources. The RPM provides a mechanism for PJM to satisfy the region's need for generation capacity, the cost of which is allocated to load-serving entities through a locational reliability charge.

The following table summarizes the status of capacity sales for Midwest Generation at December 31, 2008:

Revenues from the sale of capacity from Midwest Generation beyond the periods set forth above will depend upon the amount of capacity available and future market prices either in PJM or nearby markets if Midwest Generation has an opportunity to capture a higher value associated with those markets. Under PJM's RPM system, the market price for capacity is generally determined by aggregate market-based supply conditions and an administratively set aggregate demand curve. Among the factors influencing the supply of capacity in any particular market are plant forced outage rates, plant closings, plant delistings (due to plants being removed as capacity resources and/or to export capacity to other markets), capacity imports from other markets, and the CONE.

Midwest Generation entered into hedge transactions in advance of the RPM auctions with counterparties that are settled through PJM. In addition, the load service requirements contracts entered into by Midwest Generation with Commonwealth Edison include energy, capacity and ancillary services (sometimes referred to as a "bundled product"). Under PJM's business rules, Midwest Generation sells all of its available capacity (defined as unit capacity less forced outages) into the RPM and is subject to a locational reliability charge for the load under these contracts. This means that the locational reliability charge generally offsets the related amounts sold in the RPM, which Midwest Generation presents on a net basis in the table above.

Sales made from the Illinois Plants in the real-time or day-ahead market receive the actual spot prices or day-ahead prices, as the case may be, at the busbars (delivery points) of the individual plants.

In order to mitigate price risk from changes in spot prices at the individual plant busbars, Midwest Generation may enter into cash settled futures contracts as well as forward contracts with counterparties for energy to be delivered in future periods. Currently, a liquid market for entering into these contracts at the individual plant busbars does not exist. A liquid market does exist for settlement points at the Northern Illinois Hub and the AEP/Dayton Hub. Midwest Generation's hedging activities use these settlement points (and, to a lesser extent, other similar trading hubs) to enter into hedging contracts. Midwest Generation's revenues with respect to such forward contracts include:

Under PJM's market design, locational marginal pricing, which establishes market prices at specific locations throughout PJM by considering factors including generator bids, load requirements, transmission congestion and losses, can cause the price of a specific delivery point to be higher or lower relative to other locations depending on how the point is affected by transmission constraints. Effective June 1, 2007, PJM implemented marginal losses which adjust the algorithm that calculates locational marginal prices to include a component for marginal transmission losses in addition to the component included for congestion. To the extent that, on the settlement date of a hedge contract, spot prices at the relevant busbar are lower than spot prices at the settlement point, the proceeds actually realized from the related hedge contract are effectively reduced by the difference. This is referred to as "basis risk." During 2008, transmission congestion in PJM has resulted in prices at the individual busbars of the Illinois Plants being lower than those at the Northern Illinois Hub by an average of 2%.

The Illinois Plants purchase coal primarily obtained from the Southern PRB of Wyoming. Coal purchases are made under a variety of supply agreements extending through 2010. The following table summarizes the amount of coal under contract at December 31, 2008 for the next two years.

Midwest Generation is subject to price risk for purchases of coal that are not under contract. Prices of PRB coal (with 8,800 Btu per pound heat content and 0.8 pounds of SO₂ per MMBtu sulfur content) purchased for the Illinois Plants increased during 2008 from 2007 year-end prices and increased during 2007 from 2006 year-end prices. The 2008 and 2007 fluctuations in PRB coal prices were in line with normal market price volatility. The price of PRB coal fluctuated between $11 per ton to $14.50 per ton during 2008, with a price of $13 per ton at January 9, 2009, as reported by the EIA. In 2007, the price of PRB coal ranged from $8.35 per ton to $11.50 per ton, which was the price per ton at December 21, 2007. In 2006, the price of PRB coal ranged from $20.66 per ton in January 2006 to $9.90 per ton at December 15, 2006, as reported by the EIA.

Midwest Generation has contractual agreements for the transport of coal to its facilities. The primary contract is with Union Pacific Railroad (and various delivering carriers), which extends through 2011. Midwest Generation is exposed to price risk related to higher transportation rates after the expiration of

its existing transportation contracts. Current transportation rates for PRB coal are higher than the existing rates under contract (transportation costs are more than 50% of the delivered cost of PRB coal to the Illinois Plants).

Based on Midwest Generation's anticipated coal requirements in 2009 in excess of the amount under contract, Midwest Generation expects that a 10% change in the price of coal at December 31, 2008 would increase or decrease pre-tax income in 2009 by approximately $1 million.

Midwest Generation is subject to price risk for purchases of emission allowances required for actual emissions greater than allowances held. The market price for emission allowances may vary significantly. Based on Midwest Generation's anticipated annual and seasonal NO_X requirements for 2009 beyond those allowances already purchased, Midwest Generation expects that a 10% change in the price of annual and seasonal NO_X emission allowances at December 31, 2008 would increase or decrease pre-tax income in 2009 by approximately $4 million.

See "Midwest Generation, LLC Notes to Consolidated Financial Statements—Note 9. Commitments and Contingencies—Environmental Matters and Regulations" for a discussion of environmental regulations related to emissions.

Midwest Generation uses a number of energy contracts to manage exposure from changes in the price of electricity, including forward sales and purchases of physical power and forward price swaps which settle only on a financial basis (including futures contracts). Midwest Generation follows SFAS No. 133, and under this Standard these energy contracts are generally defined as derivative financial instruments. Importantly, SFAS No. 133 requires changes in the fair value of each derivative financial instrument to be recognized in earnings at the end of each accounting period unless the instrument qualifies for hedge accounting under the terms of SFAS No. 133. For derivatives that do qualify for cash flow hedge accounting, changes in their fair value are recognized in other comprehensive income until the hedged item settles and is recognized in earnings. However, the ineffective portion of a derivative that qualifies for cash flow hedge accounting is recognized currently in earnings. For further discussion of derivative financial instruments, refer to "Management's Overview; Critical Accounting Policies and Estimates—Critical Accounting Policies and Estimates—Derivative Financial Instruments and Hedging Activities."

SFAS No. 133 affects the timing of income recognition, but has no effect on cash flow. To the extent that income varies under SFAS No. 133 from accrual accounting (i.e., revenue recognition based on

settlement of transactions), Midwest Generation records unrealized gains or losses. Unrealized SFAS No. 133 gains or losses result from:

Midwest Generation classifies unrealized gains and losses from energy contracts as part of operating revenues. The results of derivative activities are recorded as part of cash flows from operating activities on the consolidated statements of cash flows. The following table summarizes unrealized gains (losses) for the three-year period ended December 31, 2008:

On September 15, 2008, Lehman Brothers Holdings filed for protection under Chapter 11 of the U.S. Bankruptcy Code. Midwest Generation had power contracts with Lehman Brothers Commodity Services, Inc., a subsidiary of Lehman Brothers Holdings, for 2009 and 2010. Lehman Brothers Commodity Services also filed for bankruptcy protection on October 3, 2008. The obligations of Lehman Brothers Commodity Services under the power contracts are guaranteed by Lehman Brothers Holdings. These contracts qualified as cash flow hedges under SFAS No. 133 until Midwest Generation dedesignated the power contracts effective September 12, 2008 when it determined that it was no longer probable that performance would occur. The amount recorded in accumulated comprehensive income (loss) related to the effective portion of the hedges was $24 million pre-tax ($15 million, after tax) on that date. Since the power contracts are no longer being accounted for as cash flow hedges under SFAS No. 133 and subsequently were terminated, the subsequent change in fair value was recorded as an unrealized loss in 2008. Under SFAS No. 133, the pre-tax amount recorded in accumulated other comprehensive income (loss) will be reclassified to operating revenues based on the original forecasted transactions in 2009 ($15 million) and 2010 ($9 million), unless it becomes probable that the forecasted transactions will no longer occur.

At December 31, 2008, excluding the unrealized losses described above related to Lehman Brothers Commodity Services, unrealized gains of $1 million were recognized from non-qualifying hedge contracts or the ineffective portion of cash flow hedges related to subsequent periods ($1 million in unrealized losses for 2009 and $2 million in unrealized gains for 2010).

Midwest Generation adopted SFAS No. 157 effective January 1, 2008. The standard established a hierarchy for fair value measurements. See "Midwest Generation, LLC and Subsidiaries Notes to Consolidated Financial Statements—Note 2. Fair Value Measurements," for further discussion of Midwest Generation's adoption of SFAS No. 157.

The following table summarizes the fair values for outstanding financial instruments used for hedging activities:

In assessing the fair value of Midwest Generation's derivative financial instruments, EMMT uses quoted market prices and forward market prices adjusted for credit risk. The fair value of commodity price contracts takes into account quoted market prices, time value of money, volatility of the underlying commodities and other factors. The increase in fair value of electricity contracts at December 31, 2008 as compared to December 31, 2007 is attributable to a decline in the average market prices for power as compared to contracted prices at December 31, 2008, which is the valuation date. A 10% change in the market price at December 31, 2008 would increase or decrease the fair value of outstanding derivative commodity price contracts by approximately $12 million. The following table summarizes the maturities and the related fair value of Midwest Generation's commodity derivative assets and liabilities as of December 31, 2008:

Prices provided by external sources in the preceding table include derivatives whose fair value is based on forward market prices in active markets adjusted for non-performance risks which would be considered Level 2 derivative positions when there are no unobservable inputs that are significant to the valuation. EMMT obtains forward market prices from traded exchanges (ICE Futures U.S. or New York Mercantile Exchange) and available broker quotes. Then, EMMT selects a primary source that best represents traded activity for each market to develop observable forward market prices in determining the fair value of these positions. Broker quotes or prices from exchanges are used to validate and corroborate the primary source. These price quotations reflect mid-market prices (average of bid and ask) and are

obtained from sources that EMMT believes to provide the most liquid market for the commodity. EMMT considers broker quotes to be observable when corroborated with other information which may include a combination of prices from exchanges, other brokers, and comparison to executed trades.

In conducting Midwest Generation's hedging activities, EMMT contracts with a number of utilities, energy companies, financial institutions, and other companies, collectively referred to as counterparties. In the event a counterparty were to default on its trade obligation, Midwest Generation would be exposed to the risk of possible loss associated with re-contracting the product at a price different from the original contracted price if the non-performing counterparty were unable to pay the resulting damages owed to Midwest Generation. Midwest Generation's agreement with EMMT transfers the risk of non-payment of accounts receivable from counterparties to EMMT. Notwithstanding the foregoing, Midwest Generation will not be in default under the credit agreement if it fails to enforce payment from EMMT in the case of nonpayment of an account receivable from a counterparty, so long as the counterparty is rated investment grade.

The obligations of Midwest Generation under the credit agreement are secured by, among other things, an account of EMMT in which EMMT will deposit funds received from third-party counterparties for sales of energy and capacity from the Illinois Plants. For further discussion, refer to "Results of Operations—Related Party Transactions—EMMT Agreements."

To manage credit risk, EMMT looks at the risk of a potential default by counterparties. Credit risk is measured by the loss that EMMT would expect to incur if a counterparty failed to perform pursuant to the terms of its contractual obligations. EMMT measures, monitors and mitigates credit risk to the extent possible. To mitigate credit risk from counterparties, master netting agreements are used whenever possible and counterparties may be required to pledge collateral when deemed necessary. EMMT also takes other appropriate steps to limit or lower credit exposure.

EMMT has established processes to determine and monitor the creditworthiness of counterparties. EMMT manages the credit risk of its counterparties based on credit ratings using published ratings of counterparties and other publicly disclosed information, such as financial statements, regulatory filings, and press releases, to guide it in the process of setting credit levels, risk limits and contractual arrangements, including master netting agreements. A risk management committee regularly reviews the credit quality of EMMT's counterparties. Despite this, there can be no assurance that these efforts will be wholly successful in mitigating credit risk or that collateral pledged will be adequate.

In addition, coal for the Illinois Plants is purchased from suppliers under contracts which may be for multiple years. A number of the coal suppliers to the Illinois Plants do not currently have an investment grade credit rating and, accordingly, Midwest Generation may have limited recourse to collect damages in the event of default by a supplier. Midwest Generation seeks to mitigate this risk through diversification of its coal suppliers and through guarantees and other collateral arrangements when available. Despite this, there can be no assurance that these efforts will be successful in mitigating credit risk from coal suppliers.

Midwest Generation derives a significant source of its operating revenues from electric power sold into the PJM market by EMMT. Sales into PJM accounted for approximately 58% of Midwest Generation's consolidated operating revenues for the year ended December 31, 2008. Moody's rates PJM's debt Aa3. PJM, an ISO with over 300 member companies, maintains its own credit risk policies

and does not extend unsecured credit to non-investment grade companies. Any losses due to a PJM member default are shared by all other members based upon a predetermined formula.

Midwest Generation also derived a significant source of its revenues from the sale of energy, capacity and ancillary services generated at the Illinois Plants to Commonwealth Edison under load requirements services contracts. Sales under these contracts accounted for 18% of Midwest Generation's consolidated operating revenues for the year ended December 31, 2008. Commonwealth Edison's senior unsecured debt ratings are BBB- by S&P and Baa3 by Moody's.

Interest rate changes can affect earnings and the cost of capital for capital improvements. Midwest Generation has a $500 million working capital facility, maturing in 2012, which exposes Midwest Generation to the risk of earnings loss resulting from changes in interest rates from any borrowings outstanding. At December 31, 2008, Midwest Generation had $475 million of borrowings outstanding. Based on the amount of variable rate debt outstanding on December 31, 2008, a 100-basis-point change in interest rates at December 31, 2008 would increase or decrease Midwest Generation's 2009 annual income before taxes by approximately $5 million.

Information responding to Item 7A is filed with this report under "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations."


Financial Statements:
	Report of Independent Registered Public Accounting Firm	64
	Consolidated Statements of Income for the years ended December 31, 2008, 2007 and 2006	65
	Consolidated Balance Sheets at December 31, 2008 and 2007	66
	Consolidated Statements of Member's Equity for the years ended December 31, 2008, 2007 and 2006	67
	Consolidated Statements of Comprehensive Income for the years ended December 31, 2008, 2007 and 2006	68
	Consolidated Statements of Cash Flows for the years ended December 31, 2008, 2007 and 2006	69
	Notes to Consolidated Financial Statements	70

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

Midwest Generation's management, under the supervision and with the participation of the company's Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of Midwest Generation's disclosure controls and procedures (as such term is defined in Rules 13a-15(e) or 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")), as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period, Midwest Generation's disclosure controls and procedures are effective.

Midwest Generation's management is responsible for establishing and maintaining adequate internal controls over financial reporting, as defined in Exchange Act Rule 13a-15(f), for Midwest Generation. Under the supervision and with the participation of its Chief Executive Officer and Chief Financial Officer, Midwest Generation's management conducted an evaluation of the effectiveness of Midwest Generation's internal controls over financial reporting based on the framework set forth in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on its evaluation under the COSO framework, Midwest Generation's management concluded that Midwest Generation's internal controls over financial reporting were effective as of December 31, 2008.

There were changes as described below in Midwest Generation's internal controls over financial reporting (as that term is defined in Rules 13a-15(f) or 15d-15(f) under the Exchange Act) during the

period to which this report relates that have materially affected, or are reasonably likely to materially affect, Midwest Generation's internal controls over financial reporting.

Effective July 1, 2008, the human resources module was implemented as part of the Edison International enterprise-wide project. The implementation of this module and the related workflow capabilities resulted in a material change to Midwest Generation's financial reporting controls and procedures. Therefore, Midwest Generation has modified the design and documentation of the internal control process and procedures relating to the new timekeeping system to replace and supplement existing internal controls over financial reporting, as appropriate. The system changes were undertaken to integrate systems and consolidate information, and were not undertaken in response to any actual or perceived deficiencies in Midwest Generation's internal controls over financial reporting.

This annual report does not include an attestation report of Midwest Generation's independent registered public accounting firm regarding internal control over financial reporting. Management's report was not subject to attestation by Midwest Generation's independent registered public accounting firm pursuant to temporary rules of the Securities and Exchange Commission that permit Midwest Generation to provide only management's report in this annual report.

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of Midwest Generation, LLC and its subsidiaries at December 31, 2008 and 2007, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2008 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the index appearing under Item 15(a)(2) presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. These financial statements and financial statement schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

As discussed in Notes 1, 2, 7 and 8 to the consolidated financial statements, the Company changed the manner in which it accounts for defined benefit pension and other postretirement plans as of December 31, 2006, uncertain tax positions as of January 1, 2007, and fair value measurement and disclosure accounting principles as of January 1, 2008.

			Years Ended December 31,

			2008			2007			2006
Operating Revenues from Marketing Affiliate			$	1,778		$	1,579		$	1,399
Operating Expenses
	Fuel			482			400			382
	Gain on sale of emission allowances			(1	)		(16	)		(14	)
	Plant operations			434			420			369
	Depreciation and amortization			147			140			142
	(Gain) on buyout of contract and (gain) loss on sale of assets (Note 9)			(16	)		5			12
	Administrative and general			22			22			19

		Total operating expenses		1,068			971			910

	Operating income			710			608			489

Other Income (Expense)
	Interest and other income			127			121			119
	Interest expense			(77	)		(115	)		(202	)
	Loss on early extinguishment of debt			—			(128	)		—

		Total other income (expense)		50			(122	)		(83	)

Income before income taxes				760			486			406
Provision for income taxes				283			183			159

Net Income			$	477		$	303		$	247

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

				December 31,

				2008		2007
Assets
	Current Assets
		Cash and cash equivalents		$	650	$	65
		Due from affiliates			163		108
		Fuel inventory			81		69
		Spare parts inventory			29		23
		Loans to affiliate for margin deposits			—		54
		Interest receivable from affiliate			56		56
		Derivative assets			140		3
		Deferred taxes			—		16
		Intangible assets			52		3
		Other current assets			22		12

			Total current assets		1,193		409

	Property, Plant and Equipment				4,320		4,204
		Less accumulated depreciation and amortization			1,242		1,095

			Net property, plant and equipment		3,078		3,109

	Notes receivable from affiliate				1,352		1,356
	Long-term derivative assets				73		3
	Long-term intangible assets				—		19
	Other assets				15		16

	Total Assets			$	5,711	$	4,912

Liabilities and Member's Equity
Current Liabilities
		Accounts payable		$	44	$	29
		Book overdrafts			4		2
		Accrued liabilities			78		95
		Due to affiliates			10		82
		Interest payable			31		34
		Derivative liabilities			17		29
		Deferred taxes			70		—
		Current portion of lease financing			126		118

			Total current liabilities		380		389

	Lease financing, net of current portion				785		912
	Long-term obligations				475		—
	Deferred taxes				119		68
	Long-term derivative liabilities				11		68
	Benefit plans and other long-term liabilities				166		158

	Total Liabilities				1,936		1,595

	Commitments and Contingencies (Note 9)
	Member's Equity
		Membership interests, no par value; 100 units authorized, issued and outstanding			—		—
		Additional paid-in capital			3,511		3,587
		Accumulated earnings (deficit)			121		(226	)
		Accumulated other comprehensive income (loss)			143		(44	)

	Total Member's Equity				3,775		3,317

	Total Liabilities and Member's Equity			$	5,711	$	4,912

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

MIDWEST GENERATION, LLC
CONSOLIDATED STATEMENTS OF MEMBER'S EQUITY
(In thousands)

		Membership Interests		Additional Paid-In Capital			Accumulated Earnings (Deficit)			Accumulated Other Comprehensive Income (Loss)			Member's Equity

Balance at December 31, 2005		$	—	$	3,404		$	(776	)	$	(110	)	$	2,518
	Net income		—		—			247			—			247
	Other comprehensive income		—		—			—			163			163
	Adjustment to initially apply SFAS No. 158, net of tax		—		—			—			(5	)		(5	)
	Cash distribution to parent		—		(542	)		—			—			(542	)

Balance at December 31, 2006			—		2,862			(529	)		48			2,381

	Equity contribution		—		1,385			—			—			1,385
	Net income		—		—			303			—			303
	Other comprehensive loss		—		—			—			(92	)		(92	)
	Cash distribution to parent		—		(660	)		—			—			(660	)

Balance at December 31, 2007			—		3,587			(226	)		(44	)		3,317

	Net income		—		—			477			—			477
	Other comprehensive income		—		—			—			187			187
	Cash distribution to parent		—		(76	)		(130	)		—			(206	)

Balance at December 31, 2008		$	—	$	3,511		$	121		$	143		$	3,775

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

MIDWEST GENERATION, LLC
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(In millions)

			Years Ended December 31,

			2008			2007			2006
Net Income			$	477		$	303		$	247
Other comprehensive income (loss), net of tax:
	Pension and postretirement benefits other than pensions:
		Prior service adjustment, net of tax		(1	)		—			—
		Net gain (loss) adjustment, net of tax expense (benefit) of $(13) and $4 for 2008 and 2007, respectively		(21	)		6			—
	Unrealized gains (losses) on derivatives qualified as cash flow hedges:
		Unrealized holding gains (losses) arising during period, net of income tax expense (benefit) of $93, $(75) and $99 for 2008, 2007 and 2006, respectively		146			(119	)		155
		Reclassification adjustments included in net income, net of income tax benefit of $40, $13 and $5 for 2008, 2007 and 2006, respectively		63			21			8

Other comprehensive income (loss)				187			(92	)		163

Comprehensive Income			$	664		$	211		$	410

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

			Years Ended December 31,

			2008			2007			2006
Cash Flows From Operating Activities
	Net income		$	477		$	303		$	247
	Adjustments to reconcile income to net cash provided by operating activities:
		Depreciation and amortization		151			147			147
		(Gain) on buyout of contract and (gain) loss on sale of assets		(16	)		5			12
		Gain on sale of emission allowances		(1	)		(16	)		(14	)
		Deferred taxes		20			29			159
		Loss on early extinguishment of debt		—			128			—
	Decrease (increase) in due to/from affiliates			(128	)		161			98
	Increase in inventory			(18	)		(7	)		(27	)
	Decrease (increase) in loans to affiliate for margin deposits			54			(10	)		284
	Decrease (increase) in other current assets			(10	)		(4	)		1
	Decrease (increase) in other assets			—			(1	)		1
	Increase in intangible assets			(30	)		(22	)		—
	Increase in accounts payable and other current liabilities			—			30			2
	Decrease in interest payable			(3	)		(23	)		(3	)
	Decrease in other liabilities			(16	)		(13	)		(2	)
	Decrease (increase) in derivative assets and liabilities			65			25			(31	)

		Net cash provided by operating activities		545			732			874

Cash Flows From Financing Activities
	Borrowings on long-term debt			700			230			445
	Repayments of long-term debt			(225	)		(1,559	)		(618	)
	Capital contributions from parent			—			1,385			—
	Cash distributions to parent			(206	)		(660	)		(542	)
	Repayment of capital lease obligation			(119	)		(111	)		(104	)
	Premium paid on extinguishment of debt and financing costs			—			(109	)		—

		Net cash provided by (used in) financing activities		150			(824	)		(819	)

Cash Flows From Investing Activities
	Capital expenditures			(116	)		(40	)		(31	)
	Proceeds from sale of assets			1			1			4
	Proceeds from sale of emission allowances			2			21			14
	Decrease (increase) in restricted cash			(1	)		1			2
	Repayment of loan to affiliate			4			3			3

		Net cash used in investing activities		(110	)		(14	)		(8	)

Net increase (decrease) in cash and cash equivalents				585			(106	)		47
Cash and cash equivalents at beginning of period				65			171			124

Cash and cash equivalents at end of period			$	650		$	65		$	171

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

Midwest Generation is a wholly owned subsidiary of Edison Mission Midwest Holdings Co., which is an indirect wholly owned subsidiary of EME. EME is an indirect wholly owned subsidiary of Edison International. Midwest Generation is a Delaware limited liability company formed on July 12, 1999 by the issuance of 100% of its membership interests to Edison Mission Midwest Holdings Co. for one hundred dollars. The amount outstanding for the membership interests is not reflected on the face of the Balance Sheet due to rounding to the nearest million. Midwest Generation was formed for the purpose of obtaining financing and acquiring, owning or leasing and operating multiple fossil-fuel electric generating units located within the state of Illinois, which are referred to as the Illinois Plants, for the purpose of producing electric energy.

As of December 31, 2008, Midwest Generation operated 5,776 MW of power plants, based on installed capacity acknowledged by PJM, consisting of:

Midwest Generation has a contract with EMMT, a marketing affiliate, to sell energy and capacity into the wholesale market, to engage in hedging activities and to provide scheduling and other services. Midwest Generation also has a revolving credit agreement with EMMT in order to make revolving loans to, or have letters of credit issued on behalf of, EMMT, in order to provide credit support for forward contracts. EMMT purchases natural gas and has the ability to enter into fuel hedging arrangements on Midwest Generation's behalf.

The consolidated financial statements include the accounts of Midwest Generation and its two subsidiaries. All significant intercompany transactions and balances have been eliminated in the consolidated financial statements.

The preparation of financial statements in conformity with GAAP requires Midwest Generation to make estimates and assumptions that affect reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Cash equivalents include money market funds totaling $650 million and $65 million at December 31, 2008 and 2007, respectively. The carrying value of cash equivalents approximates fair value due to maturities of less than three months. For further discussion of money market funds, see Note 2—Fair Value Measurements.

Collateral deposits include cash collateral received from counterparties and brokers as credit support under derivative contracts. The amount of collateral deposits generally varies based on changes in fair

value of the related positions. See "New Accounting Pronouncements—Accounting Principles Adopted—FASB Staff Position FIN No. 39-1" for a discussion of Midwest Generation's adoption of FIN No. 39-1. In accordance with FIN No. 39-1, Midwest Generation presents a portion of its cash collateral deposits net with its derivative positions on its consolidated balance sheets. Amounts recognized for cash collateral received from others that have been offset against net derivative assets totaled $59 million at December 31, 2008.

Bank, legal and other direct costs incurred in connection with obtaining financing are deferred and amortized as interest expense on a basis which approximates the effective interest rate method over the term of the related debt. Accumulated amortization of these costs at December 31, 2008 and 2007 amounted to $2 million and $1 million, respectively. Amortization of deferred financing costs charged to operations was $1 million, $3 million and $5 million in 2008, 2007 and 2006, respectively.

SFAS No. 133, as amended and interpreted by other related accounting literature, establishes accounting and reporting standards for derivative instruments (including certain derivative instruments embedded in other contracts). SFAS No. 133 requires companies to record derivatives on their balance sheets as either assets or liabilities measured at their fair value unless exempted from derivative treatment as a normal sale and purchase. Midwest Generation's coal contracts either do not qualify as derivatives under SFAS No. 133 or meet the normal sales and purchases exception. All changes in the fair value of derivatives are recognized currently in earnings unless specific hedge criteria are met, which requires that a company must formally document, designate, and assess the effectiveness of transactions that receive hedge accounting. The results of derivative activities are recorded as part of cash flows from operating activities in the accompanying consolidated statements of cash flows.

SFAS No. 133 sets forth the accounting requirements for cash flow hedges. SFAS No. 133 provides that the effective portion of the gain or loss on a derivative instrument designated and qualifying as a cash flow hedging instrument be reported as a component of other comprehensive income and be reclassified into earnings in the same period during which the hedged forecasted transaction affects earnings. The remaining gain or loss on the derivative instrument, if any, must be recognized currently in earnings.

Midwest Generation evaluates the impairment of its long-lived assets based on a review of estimated future cash flows expected to be generated whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. If the carrying amount of the asset exceeds the amount of the expected future cash flows, undiscounted and without interest charges, then an impairment loss for its long-lived assets is recognized in accordance with SFAS No. 144.

Midwest Generation is included in the consolidated federal and state income tax returns of Edison International and is party to a tax-allocation agreement with its parent Edison Mission Midwest Holdings. As long as Edison International continues to own, directly or indirectly, at least 80% of the voting power of the stock of EME and its existing subsidiaries and at least 80% of the value of such stock, Midwest Generation will be included in the consolidated federal and state income tax returns of Edison International. In accordance with the agreement and the tax-allocation procedures that have been

in effect since Midwest Generation's formation, its current tax liability or benefit is generally determined on a separate return basis, except for calculating consolidated state income taxes, for which Midwest Generation uses the state tax apportionment factors of the Edison International group. The amount on the balance sheet associated with this tax-allocation agreement totaled $20 million at December 31, 2008 included in due from affiliates and $63 million at December 31, 2007 included in due to affiliates.

Midwest Generation accounts for deferred income taxes using the asset-and-liability method, wherein deferred tax assets and liabilities are recognized for future tax consequences of temporary differences between the carrying amounts and the tax bases of assets and liabilities using enacted income tax rates. Interest expense and penalties associated with income taxes are reflected in provision for income taxes on Midwest Generation's consolidated statements of income. For further discussion of income taxes, see Note 7—Income Taxes.

Intangible assets consist of emission allowances purchased by Midwest Generation. These emission allowances are stated at weighted average cost. Emission allowances do not have a pre-determined contractual term or expiration date.

Inventory consists of spare parts, coal, fuel oil, and other raw materials and is stated at the lower of weighted average cost or market.

In April 2007, the FASB issued FIN No. 39-1. This pronouncement permits companies to offset fair value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) against fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. In addition, upon the adoption, companies were permitted to change their accounting policy to offset or not offset fair value amounts recognized for derivative instruments under master netting agreements. Midwest Generation adopted FIN No. 39-1 effective January 1, 2008. The adoption of FIN No. 39-1 had no effect on Midwest Generation's consolidated financial statements.

In February 2007, the FASB issued SFAS No. 159, "Fair Value Option for Financial Assets and Liabilities, Including an Amendment of FASB Statement No. 115," which provides an option to report eligible financial assets and liabilities at fair value, with changes in fair value recognized in earnings. Midwest Generation adopted this pronouncement effective January 1, 2008. The adoption of this standard had no impact because Midwest Generation did not make an optional election to report additional financial assets and liabilities at fair value.

In September 2006, the FASB issued SFAS No. 157, which clarifies the definition of fair value, establishes a framework for measuring fair value and expands the disclosures on fair value measurements. Midwest Generation adopted SFAS No. 157 effective January 1, 2008. The adoption did not result in any retrospective adjustment to its consolidated financial statements. The accounting requirements for employers' pension and other postretirement benefit plans were effective at the end of 2008, which was the next measurement date for these benefit plans. Midwest Generation will adopt this standard for nonrecurring nonfinancial assets and liabilities measured at fair value during the first quarter of 2009. Since this standard is applied prospectively, AROs existing before the adoption of the standard will not be adjusted for nonperformance risk. For further discussion, see Note 2—Fair Value Measurements.

In October 2008, the FASB issued FSP SFAS No. 157-3, "Determining the Fair Value of a Financial Asset When the Market for That Asset Is Not Active." This position clarifies the application of SFAS No. 157 in a market that is not active and provides an example to illustrate key considerations in determining the fair value of a financial asset when the market for that financial asset is not active. It also reaffirms the notion of fair value as an exit price as of the measurement date. This position was effective upon issuance, including prior periods for which financial statements have not been issued. The adoption had no impact on Midwest Generation's consolidated financial statements.

In May 2008, the FASB issued SFAS No. 162, "The Hierarchy of Generally Accepted Accounting Principles," which identifies the sources of accounting principles and the framework for selecting the principles to be used in the preparation of financial statements for nongovernmental entities that are presented in conformity with GAAP. This statement transfers the GAAP hierarchy from the American Institute of Certified Public Accountants Statement on Auditing Standards No. 69, "The Meaning of Present Fairly in Conformity With Generally Accepted Accounting Principles" to the FASB. SFAS No. 162 was effective on November 15, 2008. The adoption of this standard did not have an impact on Midwest Generation's consolidated results of operations, financial position or cash flows.

In March 2008, the FASB issued SFAS No. 161, which requires additional disclosures related to derivative instruments, including how and why an entity uses derivative instruments, how derivative instruments and related hedged items are accounted for and how derivative instruments and related hedged items affect an entity's financial position, financial performance, and cash flows. SFAS No. 161 was effective for fiscal years beginning after November 15, 2008, with early adoption permitted. Midwest Generation will adopt SFAS No. 161 in the first quarter of 2009. Since SFAS No. 161 impacts disclosures only, the adoption of this standard will not have an impact on Midwest Generation's consolidated results of operations, financial position or cash flows.

In April 2008, the FASB issued FSP SFAS No. 142-3 which amends the factors that should be considered in developing renewal or extension assumptions used to determine the useful life of a

recognized intangible asset under SFAS No. 142, "Goodwill and Other Intangible Assets." The intent of the position is to improve the consistency between the useful life of a recognized intangible asset under SFAS No. 142 and the period of expected cash flows used to measure the fair value of the asset under SFAS No. 141(R) and other GAAP. Midwest Generation will adopt FSP SFAS No. 142-3 in the first quarter of 2009. The adoption of this position will not have an impact on Midwest Generation's consolidated results of operations, financial position or cash flows.

In December 2008, the FASB issued FSP SFAS No. 132(R)-1, "Employers' Disclosures about Postretirement Benefit Plan Assets." This position requires additional plan asset disclosures about the major categories of assets, the inputs and valuation techniques used to measure fair value, the level within the fair value hierarchy, the effect of using significant unobservable inputs (Level 3) and significant concentrations of risk. This position is effective for years ending after December 15, 2009 and therefore, Midwest Generation will adopt FSP SFAS No. 132(R)-1 at year-end 2009. FSP SFAS No. 132(R)-1 will impact disclosures only and will not have an impact on Midwest Generation's consolidated results of operations, financial position or cash flows.

Property, plant and equipment are stated at cost. Depreciation and amortization are computed by using the straight-line method over the following estimated useful lives:

As part of the acquisition of the Illinois Plants, Midwest Generation acquired emission allowances under the US EPA's Acid Rain Program. Although the emission allowances granted under this program are freely transferable, Midwest Generation intends to use substantially all the emission allowances in the normal course of its business to generate electricity. Accordingly, Midwest Generation has classified emission allowances expected to be used to generate power as part of property, plant and equipment.

Certain major pieces of Midwest Generation's equipment require repairs and maintenance on a periodic basis. These costs, including major maintenance costs, are expensed as incurred.

Certain cash balances are restricted to provide collateral for fuel suppliers. The total restricted cash included in other assets on Midwest Generation's consolidated balance sheet, composed entirely of collateral reserves, was $4 million and $3 million at December 31, 2008 and 2007, respectively.

Midwest Generation records revenue and related costs as electricity is generated or services are provided unless Midwest Generation is subject to SFAS No. 133 and does not qualify for the normal sales and purchases exception. Midwest Generation enters into power and fuel hedging and optimization transactions under a contract with EMMT. These transactions are executed primarily through the use of

physical forward commodity purchases and sales and financial commodity swaps and options. With respect to its physical forward contracts, Midwest Generation generally takes title to the commodities, and assumes the risks and rewards of ownership. Therefore, Midwest Generation records settlement of non-trading physical forward contracts on a gross basis. Financial swap and option transactions are settled net and, accordingly, Midwest Generation does not take title to the underlying commodity. Therefore, gains and losses from settlement of financial swaps and options are recorded net in operating revenues in the accompanying consolidated income statements. Managed risks typically include commodity price risk associated with fuel purchases and power sales.

SFAS No. 157 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (referred to as an "exit price" in SFAS No. 157). SFAS No. 157 clarifies that a fair value measurement for a liability should reflect the entity's nonperformance risk. In addition, SFAS No. 157 establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted market prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under SFAS No. 157 are:

Midwest Generation's assets and liabilities carried at fair value primarily consist of derivative contracts and money market funds. Derivative contracts primarily relate to power and include contracts for forward physical sales and purchases, options and forward price swaps which settle only on a financial basis (including futures contracts). Derivative contracts can be exchange traded or over-the-counter traded.

The fair value of derivative contracts takes into account quoted market prices, time value of money, volatility of the underlying commodities and other factors. Derivatives that are exchange traded in active markets for identical assets or liabilities are classified as Level 1. The majority of derivative contracts used for hedging purposes are based on forward market prices in active markets (Northern Illinois Hub and AEP/Dayton) adjusted for non-performance risks. EMMT obtains forward market prices from traded exchanges (ICE Futures U.S. or New York Mercantile Exchange) and available broker quotes. Then, EMMT selects a primary source that best represents traded activity for each market to develop observable forward market prices in determining the fair value of these positions. Broker quotes or prices from exchanges are used to validate and corroborate the primary source. These price quotations reflect mid-market prices (average of bid and ask) and are obtained from sources that EMMT believes to provide the most liquid market for the commodity. EMMT considers broker quotes to be observable when corroborated with other information which may include a combination of prices from exchanges, other brokers, and comparison to executed trades. The majority of the fair value of Midwest Generation's derivative contracts determined in this manner are classified as Level 2.

Derivatives that trade infrequently (such as financial transmission rights and over-the-counter derivatives at illiquid locations) and derivatives with counterparties that have significant non-performance risks, as discussed below, are classified as Level 3. For illiquid financial transmission rights, Midwest Generation reviews objective criteria related to system congestion on a quarterly basis and other underlying drivers and adjusts fair value when Midwest Generation concludes a change in objective criteria would result in a new valuation that better reflects the fair value. Changes in fair values are based on the hypothetical sale of illiquid positions. In circumstances where Midwest Generation cannot verify fair value with observable market transactions, it is possible that a different valuation model could produce a materially different estimate of fair value. As markets continue to develop and more pricing information becomes available, Midwest Generation continues to assess valuation methodologies used to determine fair value.

In assessing non-performance risks, Midwest Generation reviews credit ratings of counterparties (and related default rates based on such credit ratings) and prices of credit default swaps. The market price (or premium) for credit default swaps represents the price that a counterparty would pay to transfer the risk of default, typically bankruptcy, to another party. A credit default swap is not directly comparable to the credit risks of derivative contracts, but provides market information of the related risk of non-performance. In light of recent market events, Midwest Generation utilized market prices for credit default swaps in reducing the fair value of derivative assets by $3 million at December 31, 2008.

Investments in money market funds are generally classified as Level 1 as fair value is determined by observable market prices (unadjusted) in active markets.

The following table sets forth Midwest Generation's financial assets and liabilities that were accounted for at fair value as of December 31, 2008 by level within the fair value hierarchy:

The following table sets forth a summary of changes in the fair value of Midwest Generation's Level 3 derivative contracts, net for the period ended December 31, 2008:

		2008

		(in millions)
Fair value of derivative contracts, net at January 1, 2008		$	3
Total realized/unrealized gains (losses):
	Included in earnings(1)		27
	Included in accumulated other comprehensive income (loss)		(2	)
Purchases and settlements, net			(29	)
Transfers in or out of Level 3			2

Fair value of derivative contracts, net at December 31, 2008		$	1

Change during the period in unrealized gains (losses) related to derivative contracts, net held at December 31, 2008(1)		$	1

The carrying amount and fair value of outstanding derivative contracts at December 31, 2007 was a liability of $91 million.

The carrying amount of cash and cash equivalents, accounts receivables and payables contained in Midwest Generation's consolidated balance sheet approximates fair value. The following table summarizes the carrying amounts and fair values for outstanding non-derivative financial instruments:

Midwest Generation's risk management policy allows for the use of derivative financial instruments through EMMT to limit financial exposure to electricity, capacity, fuel prices, emission allowances and transmission rights for non-trading purposes. Use of these instruments exposes Midwest Generation to commodity price risk, which represents the potential loss that can be caused by a change in the market value of a particular commodity. Commodity price risks are actively monitored by a risk management committee to ensure compliance with Midwest Generation's risk management policies, through EMMT. Policies are in place which define risk management processes, and procedures exist which allow for monitoring of all commitments and positions with regular reviews by a risk management committee. EMMT uses "gross margin at risk" to identify, measure, monitor and control Midwest Generation's overall market risk exposure with respect to hedge positions at the Illinois Plants. The use of this measure allows management to aggregate overall commodity risk, compare risk on a consistent basis and

identify risk factors. Gross margin at risk measures the potential change in value of an asset or position, in each case over a given time interval, under normal market conditions, at a given confidence level. Given the inherent limitations of this measure and reliance on a single type of risk measurement tool, EMMT supplements this approach with the use of stress testing and worst-case scenario analysis for key risk factors, as well as stop-loss triggers and counterparty credit exposure limits.

The obligations of Midwest Generation under the credit agreement are secured by, among other things, an account of EMMT in which EMMT will deposit funds received from third-party counterparties for sales of energy and capacity from the Illinois Plants. See Note 6—Long-term Debt and Note 10—Related Party Transactions—EMMT Agreements.

Midwest Generation derives a significant source of its operating revenues from electric power sold into the PJM market by EMMT. Sales into PJM accounted for approximately 58%, 49% and 67% of Midwest Generation's consolidated operating revenues for the years ended December 31, 2008, 2007 and 2006, respectively. Moody's rates PJM's debt Aa3. PJM, an ISO with over 300 member companies, maintains its own credit risk policies and does not extend unsecured credit to non-investment grade

companies. Any losses due to a PJM member default are shared by all other members based upon a predetermined formula.

Beginning in January 2007, Midwest Generation also derives a significant source of its revenues from the sale of energy, capacity and ancillary services generated at the Illinois Plants to Commonwealth Edison under load requirements services contracts. Sales under these contracts accounted for 18% and 30% of Midwest Generation's consolidated operating revenues for the years ended December 31, 2008 and 2007, respectively. Commonwealth Edison's senior unsecured debt ratings are BBB- by S&P and Baa3 by Moody's.

Unrealized gains on cash flow hedges, net of tax, at December 31, 2008, included unrealized gains on commodity hedges related to futures and forward electricity contracts that qualify for hedge accounting. These gains arise because current forecasts of future electricity prices are lower than the contract prices. As Midwest Generation's hedged positions are realized, $104 million, after tax, of the net unrealized gains on cash flow hedges at December 31, 2008 are expected to be reclassified into earnings during the next 12 months. Management expects that reclassification of net unrealized gains will increase energy revenue recognized at market prices. Actual amounts ultimately reclassified into earnings over the next 12 months could vary materially from this estimated amount as a result of changes in market conditions. The maximum period over which a cash flow hedge is designated is through December 31, 2011.

Under SFAS No. 133, the portion of a cash flow hedge that does not offset the change in value of the transaction being hedged, which is commonly referred to as the ineffective portion, is immediately recognized in earnings. Midwest Generation recorded net gains (losses) of $1 million, $(13) million and $(2) million during the years ended December 31, 2008, 2007 and 2006, respectively, representing the amount of cash flow hedges' ineffectiveness, reflected in operating revenues on Midwest Generation's consolidated income statements.

These contracts qualified as cash flow hedges under SFAS No. 133 until Midwest Generation dedesignated the power contracts effective September 12, 2008 when it determined that it was no longer probable that performance would occur. The amount recorded in accumulated comprehensive income (loss) related to the effective portion of the hedges was $24 million pre-tax ($15 million, after tax) on that date. Since the power contracts are no longer being accounted for as cash flow hedges under SFAS No. 133, and subsequently were terminated, the subsequent change in fair value was recorded as an unrealized loss in 2008 included in operating revenues on Midwest Generation's consolidated statement of income. Under SFAS No. 133, the pre-tax amount recorded in accumulated other comprehensive income (loss) will be reclassified to operating revenues based on the original forecasted transactions in 2009 ($15 million) and 2010 ($9 million), unless it becomes probable that the forecasted transactions will no longer occur.

Midwest Generation has established claims in the amount of $48 million related to the contracts terminated with Lehman Brothers Holdings and its subsidiary as described above through the termination provisions of its master netting agreements with a Lehman Brothers Holdings subsidiary. Such claims have been fully reserved and are included net in other current assets on Midwest Generation's consolidated balance sheet.

At December 31, 2008 and 2007, property, plant and equipment consisted of the following:

	2008		2007

	(in millions)
Land	$	33	$	33
Power plant facilities		1,996		1,940
Emission allowances		834		834
Construction in progress		92		34
Equipment, furniture and fixtures		15		12
Plant and equipment under lease financing		1,350		1,350

		4,320		4,203
Less accumulated depreciation and amortization		1,242		1,094

Property, plant and equipment, net	$	3,078	$	3,109

In connection with Midwest Generation's financing activities, Midwest Generation has given a first priority security interest in substantially all the coal-fired generating plants owned by Midwest Generation and the assets relating to those plants, the receivables of EMMT directly related to Midwest Generation's hedge activities, and the pledge of the intercompany notes from EME (approximately $1.4 billion at December 31, 2008). The amount of assets pledged or mortgaged totals approximately $2.9 billion at December 31, 2008. In addition to these assets, Midwest Generation's membership interests and the capital stock of Edison Mission Midwest Holdings were pledged. Emission allowances have not been pledged.

Property, plant and equipment includes assets which are capitalized under lease financing. Midwest Generation recorded amortization expense related to the leased facilities of $42 million for each of 2008, 2007 and 2006. Accumulated amortization related to the leased facilities was $352 million and $310 million at December 31, 2008 and 2007, respectively.

Midwest Generation applies SFAS No. 143, "Accounting for Asset Retirement Obligations" as interpreted by FIN No. 47, "Accounting for Conditional Asset Retirement Obligations." SFAS No. 143 as interpreted requires entities to record the fair value of a liability for an ARO in the period in which it is incurred, including a liability for the fair value of a conditional ARO if the fair value can be reasonably estimated even though uncertainty exists about the timing and/or method of settlement. When an ARO liability is initially recorded, the entity capitalizes the cost by increasing the carrying amount of the related long-lived asset. Over time, the liability is increased to its present value each period, and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of the liability, an entity either settles the obligation for its recorded amount or incurs a gain or loss upon settlement.

In November 2008, Midwest Generation completed the asbestos removal and demolition costs related to the Powerton Station ARO. Midwest Generation also has conditional AROs related to asbestos removal and disposal costs at its owned buildings and power plant facilities. Midwest Generation has not recorded a liability related to these structures because it cannot reasonably estimate fair value of the obligation at this time. The range of time over which Midwest Generation may settle these obligations in the future (demolition or other method) is sufficiently large to not allow for the use of expected present value techniques.

Midwest Generation recorded a liability representing expected future costs associated with site reclamation, facilities dismantlement and removal of environmental hazards as follows:

In 2007, EME completed a private offering of $1.2 billion of its 7.00% senior notes due May 15, 2017, $800 million of its 7.20% senior notes due May 15, 2019 and $700 million of its 7.625% senior notes due May 15, 2027. EME used a portion of the net proceeds of the offering of the senior notes, together with cash on hand, to make an equity contribution (through intermediate holding companies) to Midwest Generation of approximately $1.385 billion which enabled Midwest Generation to purchase $1 billion of its 8.75% second priority senior secured notes due 2034 and to repay the outstanding amount ($328 million) of its senior secured term loan facility. Midwest Generation recorded a pre-tax loss of $128 million ($79 million after tax) on early extinguishment of debt during the second quarter of 2007.

Generation's weighted average interest rate was 2.34% at December 31, 2008. Midwest Generation uses its secured working capital facility to provide credit support for its hedging activities and for general working capital purposes. Midwest Generation can also support its hedging activities by granting liens to eligible hedge counterparties. As of December 31, 2008, Midwest Generation had $475 million of borrowings outstanding due in 2012 and $3 million of letters of credit had been utilized under its working capital facility. As of December 31, 2007, Midwest Generation had no borrowings outstanding and $3 million of letters of credit had been utilized under its working capital facility.

The working capital facility has a first priority lien in a collateral package which consists of, among other things, substantially all the coal-fired generating plants owned by Midwest Generation and the assets relating to those plants, as well as the equity interests of Midwest Generation and its parent company, the intercompany notes entered into by EME and Midwest Generation in connection with the Powerton-Joliet sale-leaseback transaction, and the receivables of EMMT directly related to Midwest Generation's hedge activities.

Income tax provision includes the current tax provision from operating income and the change in deferred income taxes during the year. The components of the net accumulated deferred income tax liability were:

			Years Ended December 31,

			2008		2007
			(in millions)
Deferred tax assets
	Lease financing		$	49	$	45
	Derivative instruments			—		34
	Accrued expenses and liabilities			—		12
	Credit carryforward			—		12
	State taxes			14		8
	Deferred income			5		5
	Net operating loss carryforward			—		2

		Total	$	68	$	118

Deferred tax liabilities
	Derivative instruments		$	83	$	1
	Property, plant and equipment—basis differences			174		169

		Total		257		170

Deferred tax liability, net			$	189	$	52

Classification of accumulated deferred income taxes:
	Included in current assets		$	—	$	16
	Included in current liabilities		$	70	$	—
	Included in non-current liabilities		$	119	$	68

Midwest Generation has $5 million of Illinois net operating loss carryforwards at December 31, 2008 which expire beginning in 2015. The provision for income taxes is comprised of the following:

At December 31, 2008 and 2007, Midwest Generation recorded a liability of $21 million for unrecognized tax benefits which have not changed since January 1, 2007. None of the unrecognized tax benefits as of December 31, 2008 and 2007, if recognized, would affect the effective tax rate. The total amount of accrued interest and penalties was $2 million at both December 31, 2008 and 2007. The total amount of interest and penalties recognized in income tax expense was not material for each of 2008 and 2007. Midwest Generation and its subsidiaries remain subject to examination by the Internal Revenue Service, the California Franchise Tax Board, and other state authorities from 1994 to present. Midwest Generation continues its efforts to resolve open tax issues with the Internal Revenue Service and state authorities. It is reasonably possible that Midwest Generation could reach a settlement with the Internal Revenue Service to settle all or a portion of the unrecognized tax benefits through tax year 2002 within the next 12 months. Midwest Generation is included in the federal consolidated income tax return filed by Edison International. During 2008, the Internal Revenue Service commenced an examination of Edison International's consolidated federal income tax return for the years 2003 through 2006. Midwest Generation believes that it is reasonably possible that unrecognized tax benefits could be reduced by an amount up to $21 million within the next 12 months.

Employees of Midwest Generation are eligible for various benefit plans of Edison International.

A 401(k) plan is maintained to supplement eligible employees' retirement income. Midwest Generation matches 100% of non-union employee contributions, up to 6% of such employees' base annual compensation. Midwest Generation also matches 75% of contributions made by union employees, up to 6% of base annual compensation. Employer contributions vest 20% per year. Contribution expense was approximately $5 million for each year ended December 31, 2008, 2007 and 2006.

SFAS No. 158 requires companies to recognize the overfunded or underfunded status of a defined benefit pension plan and other postretirement plans as assets or liabilities in their balance sheet; the assets or liabilities are normally offset through other comprehensive income. Midwest Generation adopted SFAS No. 158 prospectively on December 31, 2006.

Midwest Generation maintains a pension plan specifically for the benefit of its union employees. A portion of Midwest Generation's non-union employees participate in the Edison International pension plan. Eligibility depends on a number of factors, including the employee's hire date. Both plans are noncontributory, defined benefit pension plans and cover employees who fulfill minimum service requirements. The Edison International plan has a cash balance feature. The expected contributions (all by employer) for the plans are approximately $6 million for the year ended December 31, 2009. The fair value of plan assets is determined primarily by quoted market prices.

Volatile market conditions have affected the value of the trusts established to fund its future long-term pension benefits. The market value of the investments (reflecting investment returns, contributions and benefit payments) within the plan trusts declined significantly during 2008. This reduction in the value of plan assets will result in increased future pension expense and contributions. Changes in the plan's funded status affect the assets and liabilities recorded on the balance sheet in accordance with SFAS No. 158. The Pension Protection Act of 2006 establishes new minimum funding standards and restricts plans underfunded by more than 20% from providing lump sum distributions and adopting amendments that increase plan liabilities.

			Years Ended December 31,

			2008			2007
			(in millions)
Change in projected benefit obligation
	Projected benefit obligation at beginning of year		$	102		$	96
	Service cost			11			12
	Interest cost			6			5
	Actuarial gain			(2	)		(9	)
	Benefits paid			(2	)		(2	)

		Projected benefit obligation at end of year	$	115		$	102

Change in plan assets
	Fair value of plan assets at beginning of year		$	79		$	65
	Actual return (loss) on plan assets			(27	)		6
	Employer contributions			12			10
	Benefits paid			(2	)		(2	)

		Fair value of plan assets at end of year	$	62		$	79

Funded status at end of year			$	(53	)	$	(23	)

Amounts recognized in consolidated balance sheets:
	Long-term liabilities		$	(53	)	$	(23	)
Amounts recognized in accumulated other comprehensive income (loss):
Prior service cost			$	2		$	2
Net loss (gain)				20			(11	)
Accumulated benefit obligation at end of year			$	99		$	87

Expense components and other amounts recognized in other comprehensive income (loss)

Other changes in plan assets and benefit obligations recognized in other comprehensive loss:

The estimated amortization amounts reclassified from other comprehensive loss for 2009 are $0.2 million for prior service costs and $1 million for net gain.

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

A portion of Midwest Generation's non-union employees retiring at or after age 55 with at least ten years of service are eligible for postretirement health care, dental, life insurance and other benefits paid in part by Midwest Generation. Eligibility depends on a number of factors, including the employee's hire date. The expected contributions (all by the employer) for the postretirement benefits other than pensions trust are $1 million for the year ended December 31, 2009.

			Years Ended December 31,

			2007			2006
			(in millions)
Change in benefit obligation
	Benefit obligation at beginning of year		$	30		$	27
	Service cost			1			1
	Interest cost			2			1
	Amendments			4			—
	Actuarial loss			2			1
	Benefits paid			(1	)		—

		Benefit obligation at end of year	$	38		$	30

Change in plan assets
	Fair value of plan assets at beginning of year		$	—		$	—
	Employer contributions			1			—
	Benefits paid			(1	)		—

		Fair value of plan assets at end of year	$	—		$	—

Funded status at end of year			$	(38	)	$	(30	)

Amounts recognized in consolidated balance sheets:
	Long-term liabilities		$	(38	)	$	(30	)
Amounts recognized in accumulated other comprehensive (income) loss:
Prior service cost (credit)			$	2		$	(3	)
Net loss				10			9
Weighted-average assumptions used to determine obligations at end of year:
Discount rate				6.25%			6.25%
Assumed health care cost trend rates:
Rate assumed for following year				8.75%			9.25%
Ultimate rate				5.5%			5.0%
Year ultimate rate reached				2016			2015

Other changes in plan assets and benefit obligations recognized in other comprehensive loss:

The estimated amortization amounts reclassified from other comprehensive loss for 2009 are $0.3 million for prior service credit and $0.7 million for net loss.

Increasing the health care cost trend rate by one percentage point would increase the accumulated benefit obligation as of December 31, 2008 by $6 million and annual aggregate service and interest costs by $1 million. Decreasing the health care cost trend rate by one percentage point would decrease the accumulated benefit obligation as of December 31, 2008 by $5 million and annual aggregate service and interest costs by $0.4 million.

The discount rate enables Midwest Generation to state expected future cash flows at a present value on the measurement date. Midwest Generation selects its discount rate by performing a yield curve analysis. This analysis determines the equivalent discount rate on projected cash flows, matching the timing and amount of expected benefit payments. Two corporate yield curves were considered, Citigroup and AON.

The investment of plan assets is overseen by a fiduciary investment committee. Plan assets are invested using a combination of asset classes, and may have active and passive investment strategies within asset classes. As a result of the significant increase in global financial markets volatility, during 2008 and in early 2009, the trusts' investment committee approved interim changes in target asset allocations. Midwest Generation employs multiple investment management firms. Investment managers within each asset class cover a range of investment styles and approaches. Risk is managed through diversification among multiple asset classes, managers, styles, and securities. Plan, asset class and individual manager performance is measured against targets. Midwest Generation also monitors the stability of its investments managers' organizations.

Permitted ranges around asset class portfolio weights are plus or minus 3%. Where approved by the fiduciary investment committee, futures contracts are used for portfolio rebalancing and to approach fully invested portfolio positions. Where authorized, a few of the plan's investment managers employ limited use of derivatives, including futures contracts, options, options on futures and interest rate swaps in place of direct investment in securities to gain efficient exposure to markets. Derivatives are not used to leverage the plans or any portfolios.

The overall expected long term rate of return on assets assumption is based on the long-term target asset allocation for plan assets and capital markets return forecasts for asset classes employed. A portion of postretirement benefits other than pensions trust asset returns are subject to taxation, so the expected long-term rate of return for these assets is determined on an after-tax basis.

Capital markets return forecasts are based on a long-term equilibrium forecast from an independent firm, as well as a separate analysis of expected equilibrium returns. The independent firm uses its research and judgment to determine long-term equilibrium forecasts. A core set of macroeconomic variables is used including real GDP growth, personal consumption expenditures, the federal funds target rate, dividend yield, and the treasury yield curve. Fixed income, equity and private equity returns are determined from these factors. In addition, a separate analysis of equilibrium returns is made. The estimated total return for fixed income is based on an equilibrium yield for intermediate United States government bonds plus a premium for exposure to non-government bonds in the broad fixed income market. The equilibrium yield is based on analysis of historic and projected data and is consistent with experience over various economic environments. The premium of the broad market over United States government bonds is an historic average premium. The estimated rate of return for equity includes a 3% premium over the estimated total return of intermediate United States government bonds. The rate of return for private equity is estimated to be a 5% premium over public equity, reflecting a premium for higher volatility and illiquidity.

Midwest Generation has lease financings with respect to its Powerton-Joliet Stations, which are described in more detail below. Midwest Generation also has operating leases in place with respect to equipment, primarily railcars, with termination option dates in various years through 2019.

At December 31, 2008, the future operating and lease financing commitments were as follows:

Operating lease expense amounted to $19 million, $20 million and $19 million in 2008, 2007 and 2006, respectively.

On August 24, 2000, Midwest Generation entered into a sale-leaseback transaction with respect to the Powerton Station and Units 7 and 8 of the Joliet Station located in Illinois to third-party lessors for an aggregate purchase price of $1.367 billion. Under the terms of the leases (33.75 years for Powerton and 30 years for Joliet), Midwest Generation makes semi-annual lease payments on each January 2 and July 2, beginning January 2, 2001. If a lessor intends to sell its interest in the Powerton or Joliet power

facility, Midwest Generation has a right of first refusal to acquire the interest at fair market value. Under the terms of each lease, Midwest Generation may request a lessor, at its option, to refinance the lessor debt, which, if completed, would affect the base lease rent. The lessor debt of $1.147 billion was obtained from the issuance pursuant to two pass-through trust agreements between Midwest Generation and pass-through trustees of Pass-Through Certificates with terms ranging from nine to sixteen years with fixed interest rates ranging from 8.30% to 8.56%. The gain on the sale of the power facilities has been deferred and is being amortized over the term of the leases.

Under the terms of the foregoing sale-leaseback transaction, distributions are restricted unless a specified financial covenant is met. At December 31, 2008, Midwest Generation met this covenant. In addition, the lease agreements and the Midwest Generation credit agreement contain covenants that include, among other things, restrictions on Midwest Generation's ability to incur debt, create liens on its property, merge or consolidate, sell assets, make investments, engage in transactions with affiliates, make distributions, make capital expenditures, enter into agreements restricting its ability to make distributions, engage in other lines of business, or engage in transactions for any speculative purpose.

At December 31, 2008, Midwest Generation had firm commitments to spend approximately $52 million on capital expenditures in 2009 primarily related to boiler components, mill steam inerting projects, generator stator rewinds, 4kV switchgear, main power transformer and environmental improvements. These capital expenditures are planned to be financed by cash on hand and cash generated from operations.

Midwest Generation is a party to a long-term power purchase contract with Calumet Energy Team LLC. The contract requires Midwest Generation to pay a monthly capacity payment and gives Midwest Generation an option to purchase energy from Calumet Energy Team at prices based primarily on operations and maintenance and fuel costs. These minimum commitments are currently estimated to aggregate $9 million, summarized as follows: 2009—$4 million; 2010—$4 million; and 2011—$1 million.

At December 31, 2008, Midwest Generation had fuel purchase commitments with various third-party suppliers for the purchase of coal. Based on the contract provisions, which consist of fixed prices subject to adjustment clauses, these minimum commitments are currently estimated to aggregate $358 million in the next two years, summarized as follows: 2009—$227 million and 2010—$131 million.

In connection with the acquisition of the Illinois Plants, Midwest Generation had assumed a long-term coal supply contract and recorded a liability to reflect the fair value of this contract. In March 2008, Midwest Generation entered into an agreement to buy out its coal obligations for the years 2009 through 2012 under this contract with a one-time payment to be made in January 2009. Midwest Generation recorded a pre-tax gain of $15 million ($9 million, after tax) during the first quarter of 2008 reflected in "(Gain) on buyout of contract and (gain) loss on sale of assets" on Midwest Generation's consolidated statements of income.

At December 31, 2008, Midwest Generation had contractual commitments for the transport of coal to its facilities. The primary contract is with Union Pacific Railroad (and various delivering carriers), which extends through 2011. Midwest Generation commitments under this agreement are based on actual coal purchases from the PRB. Accordingly, Midwest Generation's contractual obligations for transportation are based on coal volumes set forth in its fuel supply contracts. Based on the committed coal volumes in the fuel supply contracts described above, these minimum commitments are currently estimated to aggregate $396 million in the next two years, summarized as follows: 2009—$236 million and 2010—$160 million.

At December 31, 2008, Midwest Generation had contractual commitments for the purchase of materials for environmental controls equipment. These minimum commitments are estimated to aggregate $173 million in the next five years, summarized as follows: 2009—$31 million; 2010—$43 million; 2011—$43 million; 2012—$41 million; and 2013—$15 million.

In connection with the sale-leaseback transactions related to the Powerton and Joliet Stations and previously the Collins Station, EME, Midwest Generation and another wholly owned subsidiary of EME entered into tax indemnity agreements. Although the Collins Station lease terminated in April 2004, Midwest Generation's tax indemnity agreement with the former lease equity investor is still in effect. Under these tax indemnity agreements, these entities agreed to indemnify the lessors in the sale-leaseback transactions for specified adverse tax consequences that could result in certain situations set forth in the tax indemnity agreement, including specified defaults under the respective leases. The potential indemnity obligation under these tax indemnity agreements could be significant. Due to the nature of these potential obligations, Midwest Generation cannot determine a maximum potential liability which would be triggered by a valid claim from the lessors. Midwest Generation has not recorded a liability related to these indemnities.

obligation under this indemnity, a maximum potential liability cannot be determined. This indemnification for environmental liabilities is not limited in term and would be triggered by a valid claim from Commonwealth Edison. Commonwealth Edison has advised Midwest Generation that Commonwealth Edison believes it is entitled to indemnification for all liabilities, costs, and expenses that it may be required to bear as a result of the NOV discussed below under "—Contingencies—New Source Review Notice of Violation" and potential litigation by private groups related to the NOV. Except as discussed below, Midwest Generation has not recorded a liability related to this indemnity.

Midwest Generation entered into a supplemental agreement with Commonwealth Edison and Exelon Generation on February 20, 2003 to resolve a dispute regarding interpretation of its reimbursement obligation for asbestos claims under the environmental indemnities set forth in the Asset Sale Agreement. Under this supplemental agreement, Midwest Generation agreed to reimburse Commonwealth Edison and Exelon Generation for 50% of specific asbestos claims pending as of February 2003 and related expenses less recovery of insurance costs, and agreed to a sharing arrangement for liabilities and expenses associated with future asbestos-related claims as specified in the agreement. As a general matter, Commonwealth Edison and Midwest Generation apportion responsibility for future asbestos-related claims based upon the number of exposure sites that are Commonwealth Edison locations or Midwest Generation locations. The obligations under this agreement are not subject to a maximum liability. The supplemental agreement had an initial five-year term with an automatic renewal provision for subsequent one-year terms (subject to the right of either party to terminate); pursuant to the automatic renewal provision, it has been extended until February 2010. There were approximately 222 cases for which Midwest Generation was potentially liable and that had not been settled and dismissed at December 31, 2008. Midwest Generation had recorded a $52 million and $54 million liability at December 31, 2008 and 2007, respectively, related to this matter.

At December 31, 2008 and 2007, Midwest Generation had a $9 million and $2 million receivable, respectively, recorded primarily related to insurance claims from unplanned outages. During 2008 and 2007, $6 million and $2 million, respectively, related to business interruption insurance coverage were recorded and have been reflected in interest and other income on Midwest Generation's consolidated statements of income. Midwest Generation received $6 million in cash payments related to insurance claims during 2008.

The construction and operation of power plants are subject to environmental regulation by federal, state and local authorities. Midwest Generation believes that it is in substantial compliance with existing environmental regulatory requirements. However, possible future developments, such as the promulgation of more stringent environmental laws and regulations, future proceedings that may be initiated by environmental and other regulatory authorities, cases in which new theories of liability are recognized, and settlements agreed to by other companies that establish precedent or expectations for the power industry, could affect the costs and the manner in which Midwest Generation conducts its businesses and could require substantial additional capital or operational expenditures or the ceasing of operations at certain of its facilities. There is no assurance that Midwest Generation's financial position and results of

operations would not be materially adversely affected. Midwest Generation is unable to predict the precise extent to which additional laws and regulations may affect its future operations and capital expenditure requirements.

Typically, environmental laws and regulations require a lengthy and complex process for obtaining licenses, permits and approvals prior to construction, operation or modification of a project or generating facility. Meeting all the necessary requirements can delay or sometimes prevent the completion of a proposed project as well as require extensive modifications to existing projects, which may involve significant capital or operational expenditures. If Midwest Generation fails to comply with applicable environmental laws, it may be subject to injunctive relief or penalties and fines imposed by federal and state regulatory authorities.

The federal CAA, state clean air acts, and federal and state regulations implementing such statutes have substantial impacts on power generation facilities, particularly coal-fired plants. Federal environmental regulations require reductions in emissions and require states to adopt implementation plans that are equal to or more stringent than the federal requirements. Compliance with these regulations and SIPs will affect the costs and the manner in which Midwest Generation conducts its business, and is expected to require Midwest Generation to make substantial additional capital expenditures. There is no assurance that Midwest Generation would be able to recover these increased costs from its customers or that Midwest Generation's financial position and results of operations would not be materially adversely affected as a result.

The CAIR, issued by the US EPA on March 10, 2005, applies to 28 eastern states and the District of Columbia and is intended to address ozone and fine particulate matter attainment issues by reducing regional NO_X and SO₂ emissions. The CAIR reduces the current CAA Title IV Phase II SO₂ emission allowance cap for 2010 and 2015 by 50% and 65%, respectively. The CAIR also requires reductions in regional NO_X emissions in 2009 and 2015 by 53% and 61%, respectively, from 2003 levels. Illinois has developed SIPs to meet CAIR requirements. The Illinois SIPs for the CAIR, with the exception for set-asides of NO_X allowances in Illinois, substantively matched the federal CAIR requirements.

The CAIR was challenged in court by state, environmental and industry groups, and in July 2008 a three-judge panel of the District of Columbia Circuit Court of Appeals issued a decision to vacate the CAIR in its entirety and remand to the US EPA to issue a new rule consistent with the decision once the Court issued its mandate. The decision raised significant questions as to whether the US EPA would be able to design cap-and-trade programs for NO_X and SO₂ that are authorized and consistent with the CAA provisions that address upwind contributions to downwind states' noncompliance with national ambient air quality standards for ozone and fine particulate matter. Following the decision, the US EPA requested that states reinstate the existing "SIP Call" ozone season NO_X cap-and-trade program, which was due to be replaced by the CAIR.

In September 2008, the US EPA and other parties requested a rehearing of the decision by the same three-judge panel or by the full District of Columbia Circuit Court. In December 2008, the Court remanded the CAIR to the US EPA without vacating the rule, "so that the US EPA may remedy CAIR's flaws in accordance with the Court's July 11, 2008 opinion in the case." The practical impact of the remand is that CAIR requirements became effective January 1, 2009 and are to remain in place until the US EPA promulgates a revised rule. The timing and substance of the revised rule are not yet clear. The

Court did not set a date by which the US EPA must act on the remand, but the judges noted that they did not intend to grant an indefinite stay of their decision and that the petitioners could bring a petition to the Court if US EPA fails to act in a timely manner. There is substantial uncertainty as to how the US EPA will address the deficiencies identified by the Court and the impact revised regulations will have on SIPs promulgated to implement the CAIR. In addition, the US EPA has allowed states to rely on compliance with the CAIR to satisfy obligations under other CAA programs, including regional haze regulations and reasonably available control technology requirements. Depending on what happens with respect to the CAIR, the Illinois Plants may be subject to additional requirements pursuant to these programs.

The Illinois Plants continue to be subject to the CAIR. Midwest Generation expects that compliance with the CAIR, and revised or additional state regulations promulgated to comply with a revised CAIR and/or other air regulatory requirements, could result in increased capital expenditures and operating expenses beyond those already required by the CPS discussed below.

On December 11, 2006, Midwest Generation entered into an agreement with the Illinois EPA to reduce mercury, NO_X and SO₂ emissions at the Illinois Plants. The agreement has been embodied in an Illinois rule called the CPS. All of Midwest Generation's coal-fired electric generating units are subject to the CPS.

In order to comply with the CPS, Midwest Generation shut down Unit 6 at the Waukegan Station on December 31, 2007 and must permanently shut down Units 1 and 2 at the Will County Station by December 31, 2010.

The principal emission standards and control technology requirements for NO_X and SO₂ under the CPS are as described below:

NO_X Emissions—Beginning in calendar year 2012 and continuing in each calendar year thereafter, Midwest Generation must comply with an annual and seasonal NO_X emission rate of no more than 0.11 lbs/million Btu. In addition to these standards, Midwest Generation must install and operate SNCR equipment on Units 7 and 8 at the Crawford Station by December 31, 2015.

Midwest Generation is in the process of completing engineering work for the potential installation of SCR equipment on Units 5 and 6 at the Powerton Station and SNCR equipment on Unit 6 at the Joliet Station. The SCR equipment at the Powerton Station is currently estimated to cost $500 million, and the SNCR equipment on Unit 6 at the Joliet Station is currently estimated to cost $13 million (both figures are in 2008 dollars). This technology combination represents one possible compliance plan for the NO_X emission rate. Midwest Generation is evaluating other potential solutions that are less costly to meet the NO_X emission rate that combine the use of alternative NO_X removal technologies with certain unit shutdowns.

SO₂ Emissions—Midwest Generation must comply with an overall SO₂ annual emission rate of:

In addition to these standards, Midwest Generation must install and operate the following specific emission control technologies by the dates indicated:

The engineering work at the Powerton Station also included the potential installation of FGD equipment on Units 5 and 6, and Midwest Generation currently estimates approximately $1 billion (in 2008 dollars) of capital expenditures would be required for the FGD equipment at the Powerton Station. Midwest Generation also determined these capital expenditures could be reduced if the construction work sequence of FGD and SCR at the Powerton Station were reversed. The complexity of the Powerton Station installation and construction interferences are representative of the balance of the fleet and Midwest Generation currently estimates approximately $650/kW for any FGD installation it elects to make on other units.

Changes in the cost of labor, equipment, and materials, among other factors, may materially affect the above estimates for SCR, SNCR and FGD equipment.

Decisions to install the improvements described above have not been made. Midwest Generation is still reviewing all technology and unit shutdown combinations, including interim and alternative compliance solutions. These decisions will take into account many factors, including, among others, the effectiveness and cost of various control technologies, the remaining estimated useful life of each affected unit, the market outlook for the prices of various commodities, including electrical energy and capacity, coal and natural gas, availability of financing, and the statutory and regulatory environment including potential GHG regulation. Under current uncertain conditions, Midwest Generation cannot predict the extent to which its interim or long-term compliance with the CPS will result in the retrofit or temporary or permanent suspension or eventual shutdown of a material part of its operating units.

By means of a rule published in May 2005, the US EPA established the CAMR, which created the framework for a national, market-based cap-and-trade program to reduce mercury emissions from existing coal-fired power plants to a national cap of 38 tons by 2010 and to 15 tons by 2018, primarily

through reductions in mercury achieved by lowering SO₂ and NO_X emissions under the CAIR. States were allowed, but not required, to join the trading program by adopting the CAMR model trading rules. States retained the right to promulgate alternative regulations equivalent to or more stringent than the CAMR cap-and-trade program, as long as the regulations were approved by the US EPA.

At the time that it published the CAMR, the US EPA also published a second rule, formally rescinding its previous finding that mercury emissions from electrical generating facilities had to be regulated as a hazardous air pollutant pursuant to Section 112 of the CAA, which would have imposed technology-based standards on emission sources. Both the CAMR and US EPA's decision to remove oil and coal-fired plants from the list of sources to be regulated under Section 112 of the CAA were challenged in the U.S. Court of Appeals for the D.C. Circuit by various environmental groups and state attorneys general.

On February 8, 2008, the U.S. Court of Appeals for the D.C. Circuit vacated both rules and remanded the matter to the US EPA. The United States and the Utility Air Regulatory Group had petitioned the Supreme Court to review the D.C. Circuit's decision, but the United States subsequently filed a motion to withdraw its petition based on a determination by the US EPA to develop a new mercury regulation pursuant to Section 112 of the CAA. On February 23, 2009, the U.S. Supreme Court declined to review the D.C. Circuit's decision.

Until CAMR is replaced by a new mercury rule, mercury regulation will come from state regulatory bodies. As described below, the Illinois Plants are already subject to significant unit-specific mercury emission reduction requirements under Illinois law. Until new federal standards are developed, Midwest Generation will not be able to determine whether it will be necessary to undertake measures beyond those required by state regulations.

The final state rule for the reduction of mercury emissions in Illinois was adopted and became effective on December 21, 2006. The rule requires a 90% reduction of mercury emissions from coal-fired power plants averaged across company-owned Illinois stations and a minimum reduction of 75% for individual generating sources by July 1, 2009. The rule requires each station to achieve a 90% reduction by January 1, 2014 and, because emissions are measured on a rolling 12-month average, stations must install equipment necessary to meet the January 1, 2014, 90% reduction by January 1, 2013.

Midwest Generation's compliance with the CPS supersedes the mercury rule described above. The principal emission standards and control technology requirements for mercury under the CPS are as described below:

Beginning in calendar year 2015, and continuing thereafter on a rolling 12-month basis, Midwest Generation must either achieve an emission standard of .008 lbs mercury/GWh gross electrical output or a minimum 90% reduction in mercury for each unit (except Unit 3 at the Will County Station, which shall be included in calendar year 2016). In addition to these standards, Midwest Generation must install and operate the following specific control technologies:

Midwest Generation has installed activated carbon injection technology for the removal of mercury in 2008 for Crawford, Fisk and Waukegan Stations and is in the process of installing this technology in 2009 for Joliet, Powerton and Will County Stations. Capital expenditures relating to these controls were $37 million through 2008 and are expected to be $6 million in 2009.

The US EPA designated non-attainment areas for its 8-hour ozone standard on April 30, 2004, and for its fine particulate matter standard on January 5, 2005. Almost all of Midwest Generation's facilities are located in counties that have been identified as being in non-attainment with both standards.

On September 22, 2006 the US EPA issued a final rule that implements the revisions to its fine particulate standard originally proposed on January 17, 2006. Under the new rule, the annual standard remains the same as originally proposed but the 24-hour fine particulate standard is significantly more stringent. On February 24, 2009, the U.S. Court of Appeals for the D.C. Circuit remanded the annual fine particulate matter standard to the US EPA for review. The more stringent 24-hour fine particulate standard (and, depending on the course of the remand, a further revised annual standard) may require states to impose further emission reductions beyond those necessary to meet the existing standards. Midwest Generation anticipates that any such further emissions reduction obligations would not be imposed under this standard until 2015 at the earliest, and intends to consider such rules as part of its overall plan for environmental compliance.

On March 12, 2008, the US EPA issued a final rule to make revisions to the primary and secondary national ambient air quality standards for ozone. With regard to the primary and standards for ozone, the US EPA reduced the level of the 8-hour standard to 0.075 parts per million (ppm). The US EPA solicited comment on alternative levels down to 0.060 ppm and up to and including retaining the current 8-hour standard of 0.08 ppm (effectively 0.084 ppm using current data rounding conventions). The rule may require states to impose further emission reductions beyond those necessary to meet the existing standards. Midwest Generation anticipates that any such further emission reduction obligations would not be imposed under this standard until 2015 at the earliest, and intends to consider such rules as part of its overall plan for environmental compliance.

Beginning with the 2003 ozone season (May 1 through September 30), Midwest Generation has been required to comply with an average NO_X emission rate of 0.25 lb NO_X/MMBtu of heat input. This limitation is commonly referred to as the East St. Louis State Implementation Plan. This regulation is a State of Illinois requirement. Each of the Illinois Plants complied with this standard in 2004. Beginning with the 2004 ozone season, the Illinois Plants became subject to the federally mandated "NO_X SIP Call" regulation that provided ozone-season NO_X emission allowances to a 19-state region east of the Mississippi. This program provides for NO_X allowance trading similar to the SO₂ (acid rain) trading program already in effect.

The Illinois Plants have complied with the NO_X regulations by installing advanced burner technology and by purchasing additional allowances. Midwest Generation plans to continue to purchase allowances as it implements the agreement it reached with the Illinois EPA, but expects to purchase fewer allowances as the required technology improvements are implemented.

The Illinois EPA has begun to develop SIPs to meet National Ambient Air Quality Standards for 8-hour ozone and fine particulates with the intent of bringing non-attainment areas, such as Chicago, into attainment. The SIPs are expected to deal with all emission sources, not just power generators, and to address emissions of NO_X, SO₂, and volatile organic compounds. The SIP for 8-hour ozone was to be

submitted to the US EPA by June 15, 2007, but is currently expected to be submitted in early 2009. The SIP for fine particulates was to be submitted to the US EPA by April 5, 2008, but is currently expected to be submitted in 2010.

The CPS requires Midwest Generation to install air pollution controls that will contribute to attainment with the ozone and fine particulate matter per National Ambient Air Quality Standards. Midwest Generation does not know at this time whether the reductions required by the CPS will be sufficient for compliance with future ozone and particulate matter regulations. See "—Clean Air Interstate Rule" for further discussion.

In July 1999, the US EPA published the "Regional Haze Rule" to reduce haze and protect visibility in designated federal areas. The goal of the 1999 rule is to restore visibility in mandatory federal Class I areas, such as national parks and wilderness areas, to natural background conditions by 2064. Sources such as power plants that are reasonably anticipated to contribute to visibility impairment in Class I areas may be required to install best available retrofit technology (BART) or implement other control strategies to meet regional haze control requirements. The US EPA issued a final rulemaking on regional haze on June 15, 2005.

States were required to revise their SIPs by December 2007 to demonstrate reasonable further progress towards meeting regional haze goals. On January 9, 2009, the US EPA found that 37 states, including Illinois, had failed to submit all or a portion of their regional haze SIPs. For those states that have yet to make a submission, or that have made a submission that does not include particular SIP elements, the US EPA is making a "finding of failure to submit." The US EPA finding initiates a two-year deadline for issuance of a Federal Implementation Plan which would provide the basic program requirements for each state that has not completed an approved plan of its own by January 15, 2011. Emission reductions achieved through other ongoing control programs may be sufficient to demonstrate reasonable progress toward the long-term goal, particularly for the first 10 to 15 year phase of the program. It is possible that sources subject to the CAIR will be able to satisfy their obligations under the regional haze regulations through compliance with the CAIR although, as previously noted, the D.C. Circuit Court's decision to remand the CAIR to the US EPA means that there is substantial uncertainty as to the future of the federal and state CAIR programs. However, until the SIPs are revised, Midwest Generation cannot predict whether it will be required to install BART or implement other control strategies, and cannot identify the financial impacts of any additional control requirements.

The CPS, discussed above in "—Clean Air Interstate Rule," addresses emissions reductions at BART affected sources.

Since 1999, the US EPA has pursued a coordinated compliance and enforcement strategy to address CAA NSR compliance issues at the nation's coal-fired power plants. The NSR regulations impose certain requirements on facilities, such as electric generating stations, if modifications are made to air emissions sources at a facility. The US EPA's strategy has included both the filing of suits against a number of power plant owners, and the issuance of administrative notices of violation to a number of power plant owners alleging NSR violations.

On February 21, 2003, Midwest Generation received a request for information under Section 114 regarding past operations, maintenance and physical changes at the Illinois Plants from the US EPA. This request was part of the US EPA's industry-wide investigation of compliance by coal-fired plants with the

CAA NSR requirements. In 2003, Commonwealth Edison received a substantially similar request for information from the US EPA related to the same plants. In 2005, the US EPA submitted a request for additional information to Midwest Generation. Midwest Generation provided responses to these requests. On November 18, 2008, the US EPA and DOJ issued supplemental Section 114 requests to EME, Midwest Generation and Commonwealth Edison. EME and Midwest Generation have made an initial response to the requests and are working on a follow-up response to the requests.

On August 3, 2007, Midwest Generation received an NOV from the US EPA alleging that Midwest Generation and Commonwealth Edison violated various provisions of the NSR rules as well as state air regulations at the Illinois Plants. See "—Commitments and Contingencies—Contingencies—New Source Review Notice of Violation" for further discussion.

Regulations under the federal Clean Water Act require permits for the discharge of pollutants into United States waters and permits for the discharge of storm water flows from certain facilities. The Clean Water Act also regulates the thermal component (heat) of effluent discharges and the location, design, and construction of cooling water intake structures at generating facilities.

On July 9, 2004, the US EPA published the final Phase II rule implementing Section 316(b) of the Clean Water Act establishing standards for cooling water intake structures at existing large power plants. The purpose of the regulation is to reduce substantially the number of aquatic organisms that are pinned against cooling water intake structures or drawn into cooling water systems. Depending on the findings of the demonstration studies contemplated by the rule to demonstrate the costs and benefits of compliance, cooling towers and/or other mechanical means of reducing impingement and entrainment of aquatic organisms could have been required.

On January 27, 2007, the Second Circuit rejected the US EPA rule and remanded it to the US EPA. Among the key provisions remanded by the court were the use of cost benefit and restoration to achieve compliance with the rule. On July 9, 2007, the US EPA suspended the requirements for cooling water intake structures, pending further rulemaking. On December 2, 2008 the Supreme Court heard oral arguments on this case. A decision is expected during the first half of 2009. The US EPA has delayed rulemaking pending the decision of the court. Midwest Generation has collected impingement and entrainment data at its potentially affected Midwest Generation facilities in Illinois to begin the process of determining what corrective actions might need to be taken under the previous rule. Because there are no defined compliance targets absent a new rule, Midwest Generation is currently in the process of generally reviewing a wide range of possible control technologies. Although the rule to be generated in the new rulemaking process could have a material impact on Midwest Generation's operations, until the final compliance criteria have been published, Midwest Generation cannot reasonably determine the financial impact.

Under various federal, state and local environmental laws and regulations, a current or previous owner or operator of any facility, including an electric generating facility, may be required to investigate and remediate releases or threatened releases of hazardous or toxic substances or petroleum products located at that facility, and may be held liable to a governmental entity or to third parties for property damage, personal injury, natural resource damages, and investigation and remediation costs incurred by these parties in connection with these releases or threatened releases. Many of these laws, including the Comprehensive Environmental Response, Compensation and Liability Act of 1980, commonly referred to as CERCLA, as amended by the Superfund Amendments and Reauthorization Act of 1986, impose liability without regard to whether the owner knew of or caused the presence of the hazardous substances, and courts have interpreted liability under these laws to be strict and joint and several.

With respect to Midwest Generation's potential liabilities arising under CERCLA or similar laws for the investigation and remediation of contaminated property, Midwest Generation accrues a liability to the extent the costs are probable and can be reasonably estimated. Midwest Generation has accrued approximately $4 million at December 31, 2008 for estimated environmental investigation and remediation costs for the Illinois Plants. This estimate is based upon the number of sites, the scope of work and the estimated costs for investigation and/or remediation where such expenditures could be reasonably estimated. Future estimated costs may vary based on changes in regulations or requirements of federal, state, or local governmental agencies, changes in technology, and actual costs of disposal. In addition, future remediation costs will be affected by the nature and extent of contamination discovered at the sites that requires remediation. Given the prior history of the operations at its facilities, Midwest Generation cannot be certain that the existence or extent of all contamination at its sites has been fully identified. However, based on available information, management believes that future costs in excess of the amounts disclosed on all known and quantifiable environmental contingencies will not be material to Midwest Generation's financial position.

US EPA regulations currently classify coal combustion wastes as solid wastes that are exempt from hazardous waste requirements under what is known as the Bevill Amendment. The exemption applies to fly ash, bottom, slag, and flue gas emission control wastes generated from the combustion of coal or other fossil fuels. The US EPA has studied coal combustion wastes extensively and in 2000 concluded that fossil fuel combustions wastes do not warrant regulation as a hazardous waste under Subtitle C of the Resource Conservation and Recovery Act. However, the US EPA also concluded, in 2000 and again in a 2007 Notice of Data Availability and request for public comment, that coal combustion wastes disposed of in surface impoundments and landfills, or used for minefill, do require regulation under Subtitle D (as solid wastes) under the Resource Conservation and Recovery Act. The current classification of coal combustion wastes as exempt from hazardous waste requirements enables beneficial uses of coal combustion wastes, such as for cement production and fill materials. The Illinois Plants currently sell a significant portion of their coal combustion wastes for beneficial uses.

Legislation has been introduced in the U.S. House of Representatives and the US EPA is reviewing options for regulation of coal ash. The US EPA and many state regulatory agencies, including the Illinois EPA, are reviewing existing ash storage and disposal units and the adequacy of existing regulatory standards. Midwest Generation is monitoring state legislative and regulatory activity, but cannot predict the outcome of this activity.

Additional regulation of the storage, disposal, and beneficial uses of coal combustion wastes would affect the costs and the manner in which Midwest Generation conducts its business, and would likely require Midwest Generation to make additional capital expenditures with no assurance that the increased costs could be recovered from customers.

To date, the United States has pursued a voluntary GHG emissions reduction program to meet its obligations as a signatory to the United Nations Framework Convention on Climate Change. As a result of increased attention to climate change in the U.S., however, numerous bills have been introduced in recent sessions of the U.S. Congress that would reduce GHG emissions in the U.S. Enactment of climate change legislation within the next several years now seems likely. However, there is still significant uncertainty about the cost of complying with any future GHG emission requirements. These costs will depend upon many factors, including the required levels of GHG emission reductions, the timing of those reductions, the impact on fuel prices, whether emission allowances will be allocated with or without cost to existing generators, and whether flexible compliance mechanisms, such as a GHG offset program similar to those sanctioned under the CAA for conventional pollutants, will be part of the policy.

While debate continues at the national level over domestic climate policy and the appropriate scope and terms of any federal legislation, many states are developing state-specific measures or participating in regional legislative initiatives to reduce GHG emissions. At this point, Midwest Generation is unable to determine whether any of these proposals will be enacted into law or to estimate their potential effect on Midwest Generation.

On November 15, 2007, Illinois became a party to the Midwestern Accord, in which six of the twelve states in the Midwestern Governors' Association, along with the Province of Manitoba, have agreed to seek to develop regional GHG emission reduction goals within one year and to develop a multi-sector cap-and-trade program to achieve these goals. The accord called for such a program to be implemented in 30 months. On February 19, 2008, the six participating states announced that they would complete a model rule by the end of 2008 to create the framework for the cap-and-trade program, a schedule which has since been revised to fall 2009. Once this model rule has been drafted, each of the participating states could adopt the program through legislative action, executive order or other appropriate means. In February 2007, prior to the development of the Midwestern Accord, then-Illinois Governor Blagojevich announced a goal to reduce Illinois' GHG emissions to 1990 levels by 2020 and to 60% below 1990 levels by 2050.

Implementing regulations for regional initiatives may be more stringent and costly than federal legislative proposals currently being debated in the U.S. Congress. It cannot yet be determined whether or to what extent any federal legislative system would preempt regional or state initiatives, although such preemption would greatly simplify compliance and eliminate regulatory duplication. If state and/or

regional initiatives are allowed to stand together with federal legislation, generators could be required to purchase allowances to satisfy their state and federal compliance obligations.

Climate change regulation may be affected by litigation in federal and state courts. For example, on April 2, 2007, the United States Supreme Court issued an opinion in Massachusetts et al. v. Environmental Protection Agency, et. al., ruling that the US EPA has the authority to regulate GHG emissions of new motor vehicles under the CAA and that it has a duty to determine whether GHG emissions of new motor vehicles contribute to climate change or offer a reasoned explanation for its failure to make such a determination when presented with a request for a rulemaking on the issue by the state claimants. The Court ruled that the US EPA's failure to make the necessary determination or offer a reasonable explanation for its refusal to do so was impermissible. While this case hinged on a provision of the CAA related to emissions of motor vehicles, a parallel provision of the CAA applies to stationary sources such as electric generators, and there is litigation pending in the D.C. Circuit Court of Appeals, Coke Oven Task Force v. Environmental Protection Agency, in which the holding in Massachusetts v. Environmental Protection Agency, et al., may be applied to stationary sources such as power plants. In July 2008, the US EPA issued an advanced notice of proposed rulemaking that presented relevant information and solicited public comment as to how the US EPA should respond to the Massachusetts case, but the US EPA did not take further action on this rulemaking prior to the end of President Bush's term in office.

In 2004, several states and environmental organizations brought a complaint in federal court in New York, alleging that several electric utility corporations are jointly and severally liable under a theory of public nuisance for damages caused by the alleged contribution to global warming resulting from carbon dioxide emissions from coal-fired power plants owned and operated by these companies or their subsidiaries. Midwest Generation was not named as a defendant in the complaint. The case was dismissed and is currently on appeal with the United States Court of Appeals for the Second Circuit. In another case brought in April 2006, private citizens filed a complaint in the federal court in Mississippi against numerous defendants, including several electric utilities, arguing that emissions from the defendants' facilities contributed to climate change and seeking monetary damages related to the 2005 hurricane season. In August 2007, the court dismissed the case entirely. The plaintiffs have appealed this dismissal in the Fifth Circuit Court of Appeals.

On October 18, 2007, the Kansas Department of Health and Environment rejected a permit to construct two proposed coal-fired electrical generators based on the impact to health and the environment arising from the proposed units' emissions of carbon dioxide. This was the first reported rejection of a proposed coal plant permit based on a clean air statute. This decision has been appealed. In addition, there are a number of pending cases in which environmental groups are arguing that air permits for the construction of major coal-fired generating facilities cannot be issued unless the permits include best available control technology to control carbon dioxide emissions. The US EPA has taken the position that such controls are not required until it finalizes regulations relating to carbon dioxide emissions.

The ultimate outcome of the climate change debate could have a significant economic effect on Midwest Generation. Any legal obligation that would require Midwest Generation to reduce substantially its emissions of carbon dioxide or that would impose additional costs or charges for the emission of carbon dioxide could have a materially adverse effect on Midwest Generation. Midwest Generation will continue to monitor the federal, regional and state developments relating to regulation of GHG emissions to determine their impact on its operations. Requirements to reduce emissions of carbon dioxide and

other GHG emissions could significantly increase the cost of generating electricity from fossil fuels, especially coal, as well as the cost of purchased power.

for the years ended December 31, 2008, 2007 and 2006 were $15 million, $10 million and $7 million, respectively.

Midwest Generation had payables of $4 million and $2 million due to Midwest Generation EME at December 31, 2008 and 2007 related to these agreements.

2008	First		Second			Third(i)		Fourth		Total

	(in millions)
Operating revenues	$	468	$	391		$	501	$	418	$	1,778
Operating income		231		119			219		141		710
Provision for income taxes		92		48			87		56		283
Net income		152		83			144		98		477
2007	First		Second			Third(i)		Fourth		Total
Operating revenues	$	431	$	334		$	449	$	365	$	1,579
Operating income		193		88			207		120		608
Provision (benefit) for income taxes		67		(18	)		85		49		183
Net income (loss)		109		(23	)(ii)		135		82		303

The Edison International Ethics and Compliance Code is applicable to all directors, officers and employees of Edison International and its majority-owned subsidiaries, including Midwest Generation. The Code is available on the Internet website maintained by Midwest Generation's ultimate parent, Edison International, at www.edisonethics.com and is available in print without charge upon request from Edison International's Corporate Secretary. Any amendments or waivers of Code provisions for Midwest Generation's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, will be posted on Edison International's Internet website at www.edisonethics.com.

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

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

The following table sets forth the aggregate fees billed to Midwest Generation (consolidated total including Midwest Generation and its subsidiaries), for the fiscal years ended December 31, 2008 and December 31, 2007, by PricewaterhouseCoopers LLP:

The Edison International Audit Committee reviews with management and pre-approves all audit services to be performed by the independent accountants and all non-audit services that are not prohibited and that require pre-approval under the Securities Exchange Act. The Edison International

Audit Committee's pre-approval responsibilities may be delegated to one or more Edison International Audit Committee members, provided that such delegate(s) presents any pre-approval decisions to the Edison International Audit Committee at its next meeting. The Committee has delegated such pre-approval responsibilities to the Committee Chair. The independent auditors must assure that all audit and non-audit services provided to Midwest Generation and its subsidiaries have been approved by the Edison International Audit Committee.

During the fiscal year ended December 31, 2008, all services performed by the independent accountants were pre-approved by the Edison International Audit Committee, regardless of whether the services required pre-approval under the Securities Exchange Act.

Exhibit No.		Description

2.1		Asset Sale Agreement, dated March 22, 1999, between Commonwealth Edison Company and Edison Mission Energy as to the Fossil Generating Assets, incorporated by reference to Exhibit 2.5 to Edison Mission Energy's Form 10-K for the year ended December 31, 1998.
3.1		Limited Liability Company Agreement of Midwest Generation, LLC, effective as of July 12, 1999, incorporated by reference to Exhibit 3.3 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
3.2		Certificate of Formation of Midwest Generation, LLC, dated as of July 9, 1999, incorporated by reference to Exhibit 3.4 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.1		Pass-Through Trust Agreement A, dated as of August 17, 2000, between Midwest Generation, LLC and United States Trust Company of New York, as Pass-Through Trustee, made with respect to the formation of the Midwest Generation Series A Pass-Through Trust, and the issuance of 8.30% Pass-Through Certificates, Series A, incorporated by reference to Exhibit 4.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.2		Pass-Through Trust Agreement B, dated as of August 17, 2000, between Midwest Generation, LLC and United States Trust Company of New York, as Pass-Through Trustee, made with respect to the formation of the Midwest Generation Series B Pass-Through Trust, and the issuance of 8.56% Pass-Through Certificates, Series B, incorporated by reference to Exhibit 4.2 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.3		Form of 8.30% Pass-Through Certificate, Series A (included in Exhibit 4.1), incorporated by reference to Exhibit 4.3 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.

Exhibit No.		Description

4.4		Form of 8.56% Pass-Through Certificate, Series B (included in Exhibit 4.2), incorporated by reference to Exhibit 4.4 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.5		Indenture of Trust, Mortgage and Security Agreement (T1), dated as of August 17, 2000, between Powerton Trust I and United States Trust Company of New York, as Lease Indenture Trustee, incorporated by reference to Exhibit 4.5 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.5.1		Schedule identifying substantially identical agreement to Indenture of Trust, Mortgage and Security Agreement constituting Exhibit 4.5 hereto, incorporated by reference to Exhibit 4.5.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.6		Indenture of Trust, Mortgage and Security Agreement (T1), dated as of August 17, 2000, between Joliet Trust I and United States Trust Company of New York, as Lease Indenture Trustee, incorporated by reference to Exhibit 4.6 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.6.1		Schedule identifying substantially identical agreement to Indenture of Trust, Mortgage and Security Agreement constituting Exhibit 4.6 hereto, incorporated by reference to Exhibit 4.6.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.7		Facility Lease Agreement (T1), dated as of August 17, 2000, by and between Powerton Trust I, as Owner Lessor, and Midwest Generation, LLC, as Facility Lessee, incorporated by reference to Exhibit 4.7 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.7.1		Schedule identifying substantially identical agreement to Facility Lease Agreement constituting Exhibit 4.7 hereto, incorporated by reference to Exhibit 4.7.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.8		Facility Lease Agreement (T1), dated as of August 17, 2000, by and between, Joliet Trust I, as Owner Lessor, and Midwest Generation, LLC, as Facility Lessee, incorporated by reference to Exhibit 4.8 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.8.1		Schedule identifying substantially identical agreement to Facility Lease Agreement constituting Exhibit 4.8 hereto, incorporated by reference to Exhibit 4.8.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.9		Guarantee, dated as of August 17, 2000, made by Edison Mission Energy, as Guarantor in favor of Powerton Trust I, as Owner Lessor, incorporated by reference to Exhibit 4.9 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.

Exhibit No.		Description

4.9.1		Schedule identifying substantially identical agreement to Guarantee constituting Exhibit 4.9 hereto, incorporated by reference to Exhibit 4.9.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.10		Guarantee, dated as of August 17, 2000, made by Edison Mission Energy, as Guarantor in favor of Joliet Trust I, as Owner Lessor, incorporated by reference to Exhibit 4.10 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.10.1		Schedule identifying substantially identical agreement to Guarantee constituting Exhibit 4.10 hereto, incorporated by reference to Exhibit 4.10.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.11		Participation Agreement (T1), dated as of August 17, 2000, by and among, Midwest Generation, LLC, Powerton Trust I, as the Owner Lessor, Wilmington Trust Company, as the Owner Trustee, Powerton Generation I, LLC, as the Owner Participant, Edison Mission Energy, United States Trust Company of New York, as the Lease Indenture Trustee, and United States Trust Company of New York, as the Pass Through Trustees, incorporated by reference to Exhibit 4.12 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.11.1		Schedule identifying substantially identical agreement to Participation Agreement constituting Exhibit 4.11 hereto, incorporated by reference to Exhibit 4.12.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.12		Participation Agreement (T1), dated as of August 17, 2000, by and among, Midwest Generation, LLC, Joliet Trust I, as the Owner Lessor, Wilmington Trust Company, as the Owner Trustee, Joliet Generation I, LLC, as the Owner Participant, Edison Mission Energy, United States Trust Company of New York, as the Lease Indenture Trustee and United States Trust Company of New York, as the Pass Through Trustees, incorporated by reference to Exhibit 4.13 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.12.1		Schedule identifying substantially identical agreement to Participation Agreement constituting Exhibit 4.12 hereto, incorporated by reference to Exhibit 4.13.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
4.13		Promissory Note ($499,450,800), dated as of August 24, 2000, by Edison Mission Energy in favor of Midwest Generation, LLC, incorporated by reference to Exhibit 4.5 to Edison Mission Energy's Form 10-K for the year ended December 31, 2000.
4.13.1		Schedule identifying substantially identical agreements to Promissory Note constituting Exhibit 4.13 hereto, incorporated by reference to Exhibit 4.5.1 to Edison Mission Energy's Form 10-K for the year ended December 31, 2000.
4.14		Indenture, dated as of April 27, 2004, among Midwest Generation, LLC, Midwest Finance Corp. and The Bank of New York, as Trustee, incorporated by reference to Exhibit 4.1 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.

Exhibit No.		Description

4.14.1		Supplemental Indenture, dated as of March 1, 2006, among Midwest Generation Procurement Services, LLC, Midwest Generation, LLC, and Midwest Finance Corp., and The Bank of New York, as Trustee, incorporated by reference to Exhibit 10.4.1 to Midwest Generation LLC's Form 10-Q for the quarter ended June 30, 2006.
4.15		Collateral Trust Agreement, dated as of April 27, 2004, among Midwest Generation, LLC, the Pledgors from time to time party thereto, Citicorp North America, Inc., as Administrative Agent, The Bank of New York, as Trustee, and Wilmington Trust Company, as Collateral Trustee, incorporated by reference to Exhibit 4.4 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.16		Security Agreement, dated as of April 27, 2004, between Midwest Generation, LLC and Wilmington Trust Company, as Collateral Trustee, incorporated by reference to Exhibit 4.5 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.17		Pledge Agreement, dated as of April 27, 2004, between Midwest Generation EME, LLC and Wilmington Trust Company, as Collateral Trustee, incorporated by reference to Exhibit 4.6 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.18		Pledge Agreement, dated as of April 27, 2004, between Edison Mission Midwest Holdings Co. and Wilmington Trust Company, as Collateral Trustee, incorporated by reference to Exhibit 4.7 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.19		Security Agreement, dated as of April 27, 2004, between Edison Mission Marketing & Trading, Inc. and Wilmington Trust Company, as Collateral Trustee, incorporated by reference to Exhibit 4.8 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.20		Mortgage, Assignment of Rents and Leases, Fixture Filing, Financing Statement and Security Agreement, dated as of April 27, 2004, from Midwest Generation, LLC to Wilmington Trust Company, as Collateral Trustee (Joliet No. 9—Station No. 6 and Joliet Peaking Unit), incorporated by reference to Exhibit 4.9 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.21		Mortgage, Assignment of Rents and Leases, Fixture Filing, Financing Statement and Security Agreement, dated as of April 27, 2004, from Midwest Generation, LLC and Chicago Title Land Trust Company to Wilmington Trust Company, as Collateral Trustee (Will County Facility), incorporated by reference to Exhibit 4.10 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.22		Mortgage, Assignment of Rents and Leases, Fixture Filing, Financing Statement and Security Agreement, dated as of April 27, 2004, from Midwest Generation, LLC to Wilmington Trust Company, as Collateral Trustee (Calumet Facility), incorporated by reference to Exhibit 4.11 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
4.22.1		Schedule identifying substantially identical agreements to Mortgage, Assignment of Rents and Leases, Fixture Filing, Financing Statement and Security Agreement constituting Exhibit 4.22 hereto, incorporated by reference to Exhibit 4.11.1 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.

Exhibit No.		Description

10.1		Reimbursement Agreement, dated as of October 26, 2001, between Edison Mission Energy and Midwest Generation, LLC, incorporated by reference to Exhibit 10.15 to Edison Mission Energy's Form 10-Q for the quarter ended March 31, 2004.
10.2		Instrument of Assumption, dated as of December 15, 1999, by Midwest Generation, LLC in favor of Commonwealth Edison Company and Unicom Investment Inc., incorporated by reference to Exhibit 10.91 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
10.3		Pledge Agreement, dated as of August 17, 2000, between Midwest Generation, LLC and Citibank, N.A., incorporated by reference to Exhibit 10.105 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
10.3.1		Schedule identifying substantially identical agreements to the Pledge Agreement constituting Exhibit 10.3 hereto, incorporated by reference to Exhibit 10.105.1 to Edison Mission Energy's and Midwest Generation LLC's Registration Statement on Form S-4 to the Securities and Exchange Commission on April 20, 2001.
10.4		Credit Agreement, dated as of April 27, 2004, among Midwest Generation, LLC, the Lenders referred to therein, the Issuing Lenders referred to therein and Citicorp North America, Inc., as Administrative Agent for the Lenders and the Issuing Lenders party thereto, incorporated by reference to Exhibit 4.3 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
10.4.1		First Amended and Restated Credit Agreement (amending and restating the Credit Agreement listed as Exhibit 10.4 herein), dated as of April 18, 2005 among Midwest Generation, LLC, the Lenders referred to therein the Citicorp North America, Inc., as Administrative Agent for the Lenders and the Issuing Lenders thereto, incorporated by reference to Exhibit 10.1 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2005.
10.4.2		Second Amended and Restated Credit Agreement (amending and restating the Credit Agreement listed as Exhibit 10.4.1 herein), dated as of December 15, 2005, among Midwest Generation, LLC, the Lenders referred to therein and Citicorp North America, Inc. as Administrative Agent for the Lenders and the Issuing Lenders party thereto, incorporated by reference to Exhibit 10.6.2 to Midwest Generation, LLC's Form 10-K for the year ended December 31, 2005.
10.4.3		Third Amended and Restated Credit Agreement (amending and restating the Credit Agreement listed as Exhibit 10.4 herein), dated June 29, 2007, among Midwest Generation, LLC and the Lenders referred to therein and JPMorgan Chase Bank, N.A., as Administrative Agent for the Lenders and the Issuing Lenders party thereto, incorporated by reference to Exhibit 10.1 to Midwest Generation, LLC's Form 10-Q for the quarter ended June 30, 2007.
10.5		Accession Agreement, dated as of April 18, 2005, among Midwest Generation, LLC, the Lenders referred to therein and Citicorp North America, Inc., as Administrative Agent for the Lenders and the Issuing Lenders thereto, incorporated by referenced to Exhibit 10.2 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2005.

Exhibit No.		Description

10.5.1		Accession Agreement dated as of December 15, 2005, among Midwest Generation, LLC, the Lenders referred to therein and the Issuing Lenders party thereto, incorporated by reference to Exhibit 10.7.1 to Midwest Generation, LLC's Form 10-K for the year ended December 31, 2005.
10.6		Tax-Allocation Agreement, effective January 1, 2002, by and between Midwest Generation, LLC and Edison Mission Midwest Holdings Co., incorporated by reference to Exhibit 10.25 to Midwest Generation, LLC's Form 10-Q for the quarter ended September 30, 2002.
10.7		Amended and Restated Master Purchase, Sale and Services Agreement, entered into on April 27, 2004, between Midwest Generation, LLC and Edison Mission Marketing & Trading, Inc., incorporated by reference to Exhibit 10.2 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
10.8		Support Services Agreement, dated as of August 7, 2000, between Midwest Generation, LLC and Midwest Generation EME, LLC, incorporated by reference to Exhibit 10.4 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
10.9		Management and Administration Agreement, effective as of April 27, 2004, between Midwest Generation, LLC and Midwest Generation EME, LLC, incorporated by reference to Exhibit 10.1 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
10.10		Revolving Credit Agreement, dated as of April 27, 2004, between Edison Mission Marketing & Trading, Inc. as Borrower and Midwest Generation, LLC, as Lender, incorporated by reference to Exhibit 10.5 to Midwest Generation, LLC's Form 10-Q for the quarter ended March 31, 2004.
10.10.1		Amendment One to Revolving Credit Agreement, dated as of August 30, 2005, by and between Edison Mission Marketing & Trading, Inc. as Borrower and Midwest Generation, LLC as Lender, incorporated by reference to Exhibit 10.1 to Midwest Generation, LLC's Form 10-Q for the quarter ended September 31, 2005.
31.1*		Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act.
31.2*		Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act.
32*		Statement Pursuant to 18 U.S.C. Section 1350.

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

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

MIDWEST GENERATION, LLC AND SUBSIDIARIES
VALUATION AND QUALIFYING ACCOUNTS

(In millions)

				Additions

Description		Balance at Beginning of Year		Charged to Costs and Expenses		Charged to Other Accounts			Deductions		Balance at End of Year
Year Ended December 31, 2008
Uncollectible accounts
	Other	$	—	$	—	$	48	(1)	$	—	$	48

Total		$	—	$	—	$	48		$	—	$	48

Year Ended December 31, 2007
Uncollectible accounts
	Other	$	—	$	—	$	—		$	—	$	—

Total		$	—	$	—	$	—		$	—	$	—

Year Ended December 31, 2006
Uncollectible accounts
	Other	$	—	$	—	$	—		$	—	$	—

Total		$	—	$	—	$	—		$	—	$	—


Delaware (State or other jurisdiction of incorporation or organization)		33-0868558 (I.R.S. Employer Identification No.)
One Financial Place 440 South LaSalle Street, Suite 3500 Chicago, Illinois (Address of principal executive offices)		60605 (Zip Code)

None		Not Applicable

(Title of Class)		(Name of each exchange on which registered)


Large accelerated filer o		Accelerated filer o		Non-accelerated filer ý		Smaller reporting company o

	As of December 31,

	2008		2007		2006		2005		2004
	(in millions)
BALANCE SHEET DATA
Assets	$	5,711	$	4,912	$	5,284	$	5,802	$	5,684
Current liabilities		380		389		363		446		252
Long-term debt		475		—		1,326		1,499		1,661
Lease financing		785		912		1,030		1,141		1,245
Other long-term obligations		296		294		184		198		164
Member's equity		3,775		3,317		2,381		2,518		2,362

Service		Compensation

Energy		$.02/MWh
Capacity		$.02/MW-day
Natural gas		$.02/MMBtu
Fuel oil		$.05/bbl
Emission allowances		$.25/SO₂ allowance; and $25/NO_X allowance

		Page

Management's Overview; Critical Accounting Policies and Estimates			26
Results of Operations			34
Liquidity and Capital Resources			41
Market Risk Exposures			51

	(in millions)

Commitment	$	500
Outstanding borrowings		(475	)
Outstanding letters of credit		(3	)

Amount available	$	22

	2009		2010		2011

	(in millions)
Plant capital expenditures	$	65	$	106	$	76
Environmental expenditures		48		(a)		(a)

Total	$	113	$	106	$	76

	2008		2007			2006

	(in millions)
Equity distributions	$	206	$	660		$	542
Tax payments (receipts) under tax-allocation agreements		349		(3	)		—

Total payments	$	555	$	657		$	542

	Moody's Rating	S&P Rating	Fitch Rating

Midwest Generation(1)	Baa3	BB+	BBB-
EME	B1	BB-	BB-
EMMT	Not Rated	BB-	Not Rated

		Page

Commodity Price Risk			51
Accounting for Energy Contracts			57
Fair Value of Financial Instruments			59
Credit Risk			60
Interest Rate Risk			61

		2009				2010				2011

		GWh		Average price/ MWh		GWh		Average price/ MWh		GWh		Average price/ MWh
Energy Only Contracts(1)
	Northern Illinois Hub—AEP/Dayton Hub		9,945	$	65.44		6,555	$	68.61		612	$	76.40
Load Requirements Services Contracts(2)(3)
	Northern Illinois Hub		1,571	$	63.65		—		—		—		—

Total estimated GWh			11,516				6,555				612

		January 1, 2009 to May 31, 2009			June 1, 2009 to May 31, 2010		June 1, 2010 to May 31, 2011		June 1, 2011 to May 31, 2012

Fixed Price Capacity Sales
Through RPM Auction, Net
	MW		2,957			4,582		4,929		4,582
	Price per MW-day	$	122.41	(1)	$	102.04	$	174.29	$	110.00
Non-unit Specific Capacity Sales
	MW		880			723		—		—
	Price per MW-day	$	64.35		$	72.84	$	—	$	—

		2009			2010

Amount of coal under contract in millions of equivalent tons(1)			17.7			11.7

		December 31, 2008		December 31, 2007

		(in millions)
Commodity price:
	Electricity contracts	$	244	$	(91	)

	Total Fair Value		Maturity <1 year			Maturity 1 to 3 years		Maturity 4 to 5 years		Maturity >5 years

	(in millions)
Prices provided by external sources	$	243	$	155		$	88	$	—	$	—
Prices based on models and other valuation methods		1		(2	)		3		—		—

Total	$	244	$	153		$	91	$	—	$	—


Power plant facilities		3 to 30 years
Emission allowances		25 to 33.75 years
Equipment, furniture and fixtures		3 to 7 years
Plant and equipment under lease financing		30 to 33.75 years

		Level 1		Level 2			Level 3			Collateral(2)			Total at December 31, 2008

Assets at Fair Value
	Money market funds(1)	$	650	$	—		$	—		$	—		$	650
	Derivative contracts		—		264			2			(59	)		207
Liabilities at Fair Value
	Derivative contracts	$	—	$	(21	)	$	(1	)	$	—		$	(22	)

		December 31, 2008				December 31, 2007

		Carrying Amount		Fair Value		Carrying Amount		Fair Value
		(in millions)
Instruments
Non-derivatives:
	Long-term obligations	$	475	$	475	$	—	$	—

		Unrealized Gains (Losses) on Cash Flow Hedges			Unrecognized Gains (Losses) and Prior Service Adjustments, Net(1)			Accumulated Other Comprehensive Income (Loss)

		(in millions)
Balance at December 31, 2006		$	53		$	(5	)	$	48
	Change for 2007		(98	)		6			(92	)

Balance at December 31, 2007			(45	)		1			(44	)
	Change for 2008		209			(22	)		187

Balance at December 31, 2008		$	164		$	(21	)	$	143

	2008		2007			2006

	(in millions)
Beginning balance	$	1	$	4		$	2
Liabilities incurred/(settled) during the period		1		(3	)		(1	)
Change in estimates		—		—			3

Ending balance	$	2	$	1		$	4

			December 31,

	Target for 2009		December 31,
	Target for 2009		2008		2007
United States equity		39%		41%		47%
Non-United States equity		17%		22%		25%
Private equity		4%		4%		2%
Fixed income		40%		33%		26%

Year ended December 31,	Before Subsidy(1)		Net

	(in millions)
2009	$	1	$	1
2010		1		1
2011		1		1
2012		1		1
2013		2		2
2014-2018		13		13

	Midwest Generation and Subsidiaries ($000)

	2008		2007
Audit Fees	$	633	$	683
Audit Related Fees		—		—
Tax Fee		—		—
All Other Fees		—		—



(a)	(1)	List of Financial Statements
		See Index to Consolidated Financial Statements at Item 8 of this report.
	(2)	List of Financial Statement Schedules
		The following financial statement schedule is included in this report:
		Schedule II—Valuation and Qualifying Accounts	118
		All other schedules have been omitted because they are not applicable or the required information is included in the consolidated financial statements or notes thereto.
	(3)	List of Exhibits


		MIDWEST GENERATION, LLC (REGISTRANT)
		By:		/s/ John P. Finneran, Jr. John P. Finneran, Jr. Manager and Vice President
		Date:		March 2, 2009

Signature	Title	Date


/s/ Guy F. Gorney Guy F. Gorney	Manager and President (Principal Executive Officer)	March 2, 2009
/s/ John P. Finneran, Jr. John P. Finneran, Jr.	Manager and Vice President (Principal Financial Officer)	March 2, 2009
/s/ Mark C. Clarke Mark C. Clarke	Vice President and Controller (Controller or Principal Accounting Officer)	March 2, 2009
/s/ Steven D. Eisenberg Steven D. Eisenberg	Manager and Vice President	March 2, 2009