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)

None		Not Applicable
(Title of Class)		(Name of each exchange on which registered)

		None
		(Title of Class)

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, 2007: $0. Number of units outstanding of the registrant's Membership Interests as of February 27, 2008: 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.

		Page
	Glossary	ii
PART I
Item 1.	Business	1
Item 1A.	Risk Factors	14
Item 1B.	Unresolved Staff Comments	20
Item 2.	Properties	20
Item 3.	Legal Proceedings	22
Item 4.	Submission of Matters to a Vote of Security Holders	22
PART II
Item 5.	Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	23
Item 6.	Selected Financial Data	24
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	25
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	63
Item 8.	Financial Statements and Supplementary Data	64
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	64
Item 9A.	Controls and Procedures	64
Item 9A(T).	Controls and Procedures	65
Item 9B.	Other Information	65
PART III
Item 10.	Managers, Executive Officers and Corporate Governance	107
Item 11.	Executive Compensation	107
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	107
Item 13.	Certain Relationships and Related Transactions, and Director Independence	107
Item 14.	Principal Accountant Fees and Services	107
PART IV
Item 15.	Exhibits and Financial Statement Schedules	109
	Signatures	115

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

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, 2007, 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.

EME and Edison International are each registered with the Securities and Exchange Commission and have financial statements that are filed in accordance with rules enacted by the Securities and Exchange

Commission. For more information regarding each of these companies, see their respective annual reports on Form 10-K for the year ended December 31, 2007.

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 and are available on the Securities and Exchange Commission's internet web site at http://www.sec.gov.

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.

Historically, 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 ancillary services, has undergone significant deregulation over the last three decades, which has led to increased competition. Most recently, through EPAct 2005, Congress recognized that a significant market for electric power produced by independent power producers, such as Midwest Generation, has developed in the United States and indicating 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 expanded access to transmission service. 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 the PJM market.

PJM originally covered Pennsylvania, New Jersey, and Maryland, and now extends from North Carolina to Illinois. 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. 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.

On April 1, 2005, the MISO commenced operation, linking portions of Illinois, Wisconsin, Indiana, Michigan, and Ohio, as well as other states in the region. In the MISO, there is a bilateral market and day-ahead and real-time markets based on locational marginal pricing similar to that of PJM. Its opening has further facilitated transparency of prices and provided additional market liquidity to support risk management strategies.

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, utilities, 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.

For a number of years, natural gas had been the fuel of choice for new power generation facilities for economic, operational and environmental reasons. While natural gas-fired facilities continue to be an

important part of the nation's generation portfolio, some regulated utilities are constructing units powered by renewable resources, often with subsidies or under legislative mandate. New environmental regulations, particularly those that limit emissions of carbon dioxide and other greenhouse gases by electric generators, could put coal-fired plants at a disadvantage compared with plants utilizing other fuels.

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, representing 310 MW of capacity, 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 345kV 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. Sales may also be made from PJM into the MISO, where there is a single rate for transmission.

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 49%, 67% and 75% of Midwest Generation's consolidated operating revenues for the years ended December 31, 2007, 2006 and 2005, 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 30% of Midwest Generation's consolidated operating revenues for the year ended December 31, 2007.

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 16 million to 20 million tons.

All coal is transported under long-term transportation agreements with the Union Pacific Railroad and various delivering carriers. As of December 31, 2007, 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 one year to 12 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 first 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.

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.

Certain state and federal environmental laws require power plant operators to hold or obtain emission allowances equal, on an annual basis, to their plants' emissions of SO₂ and, on a seasonal basis, to their plants' emissions of NO_X. Emission allowances were acquired as part of the acquisition of the Illinois Plants. Additional emission allowances are purchased by Midwest Generation when operations make this necessary and are sold by Midwest Generation when it has more than needed for planned levels of operation.

See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Environmental Matters and Regulations" for a discussion of environmental regulations related to emissions.

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. Federal laws and regulations govern, among other things, transactions by and with purchasers of power, including utility companies, the operation of a power plant and the ownership of a power plant. 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. Energy-producing projects are also subject to federal, state and local laws and regulations that govern the geographical location, zoning, land use and operation of a project. Federal, state and local environmental requirements generally require that a wide variety of permits and other approvals be obtained before the commencement of construction or operation of an energy-producing facility and that the facility then operate in compliance with these permits and approvals. In addition, Midwest Generation is subject to the market rules, procedures, and protocols of the markets in which it participates.

Midwest Generation is subject to a varied and complex body of laws and regulations that are in a state of flux. Intricate 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 in a power plant if Midwest Generation 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 interstate wholesale sales and 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. The passage of the Energy Policy Act in 1992 further encouraged independent power production by providing additional exemptions from PUHCA 1935 for EWGs, such as Midwest Generation.

A comprehensive energy bill was enacted in August 2005. Known as "EPAct 2005," this comprehensive legislation 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. The FERC finalized rules to implement the congressionally mandated repeal of PUHCA 1935, effective February 8, 2006, and the enactment of PUHCA 2005. PUHCA 2005 is primarily a "books and records access" statute and does not give the FERC any new substantive authority under the FPA or Natural Gas Act. The FERC has also issued final rules to implement the electric company merger and acquisition provisions of EPAct 2005.

On July 20, 2006, the FERC certified the NERC as its Electric Reliability Organization to establish and enforce reliability standards for the bulk power system. On March 16, 2007, the FERC issued a final rule approving 83 reliability standards proposed by the NERC. The final rule became effective, and 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 generators.

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 and other non-qualifying facility independent power projects are subject to the FPA and to the FERC's ratemaking jurisdiction thereunder, but the FERC typically grants EWGs the authority to charge 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 grants the FERC jurisdiction over the sale or transfer of jurisdictional 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. In granting authority to make sales at market-based rates, the FERC typically also grants blanket approval for certain obligations, such as those related to the issuance of securities. However, dispositions of Midwest Generation's jurisdictional assets or certain types of financing arrangements may require FERC approval.

Midwest Generation's peaking units have the dual capability of burning natural gas or oil. Under the Natural Gas Act, the FERC has jurisdiction over certain sales of natural gas and over transportation and storage of natural gas in interstate commerce. The FERC has granted blanket authority to all persons to make sales of natural gas without restriction but continues to exercise significant oversight with respect to transportation and storage of natural gas services in interstate commerce.

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.

Some states that have restructured their electric industries require generators to register to provide electric service to customers. Many states are currently undergoing significant changes in their electric statutory and regulatory frameworks that result from restructuring the electric industries that may affect generators in those states. Although the FERC generally has exclusive jurisdiction over the rates charged by a non-qualifying facility independent power project to its wholesale customers, a state's public utility commission has the ability, in practice, to influence the establishment of these rates by asserting jurisdiction over a purchasing utility's ability to pass the resulting cost of purchased power through to its retail customers. In addition, states may assert jurisdiction over the siting and construction of independent power projects and, among other things, the issuance of securities, related party transactions and the sale or other transfer of assets by these facilities. The actual scope of jurisdiction over independent power projects by state public utility commissions varies from state to state. See "—Midwest Deregulation Status" below.

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 December 1997, the Governor of Illinois signed into law the Electric Service Customer Choice and Rate Relief Law of 1997. Midwest Generation refers to this law as the Illinois Electric Law. The Illinois Electric Law required electric utilities to file delivery services implementation plans for non-residential retail customers no later than March 1, 1999 and for residential customers no later than August 1, 2001 and allowed utilities to recover the costs associated with the provision of delivery services. The Illinois Electric Law also required the Illinois Commerce Commission to adopt reliability rules for the transmission and distribution systems of Illinois utilities. These rules have been adopted and include reporting and penalty provisions that apply to Commonwealth Edison.

Illinois' transition to retail electric competition was conducted in phases with approximately one-third of non-residential customers having had the opportunity to purchase electricity from alternative retail electric suppliers or electric utilities serving retail customers outside their service areas, effective October 1, 1999. Choice of suppliers is now available to all non-residential customers, and the retail market for residential electric customers was opened to competition on May 1, 2002. Currently, there are two alternative retail electric suppliers certified to sell electricity to residential customers in Illinois. Alternative retail electric suppliers include any person or company, other than an Illinois electric utility, that sells electricity to one or more retail electric customers in Illinois.

During the transition period that ran until the end of 2006, customers that switched to alternative retail electric suppliers or electric utilities serving retail customers outside their service areas could be required to pay transition charges, also known as "stranded cost" charges, to compensate the utilities that previously supplied these customers for past investments, including investments in generating plants. The Illinois Electric Law called for these transition charges to end no later than December 31, 2006.

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.

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.

Legal actions, including a complaint at the FERC by the Illinois Attorney General and two class action lawsuits, were instituted against successful participants in the 2006 Illinois power procurement auction, including EMMT. On July 24, 2007, Midwest Generation and EMMT, along with other power generation companies and utilities, entered into a settlement with the Illinois Attorney General. Enacting legislation for the settlement was signed on August 28, 2007. As part of the settlement, all auction-related complaints filed by the Illinois Attorney General at the FERC, the Illinois Commerce Commission and in the Illinois courts were dismissed and on December 24, 2007, the class action lawsuits were dismissed. For further discussion, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Contractual Obligations, Commitments and Contingencies—Contingencies—Settlement with Illinois Attorney General."

The legislation that was signed into law on August 28, 2007 is referred to as the Illinois Power Agency Act. In addition to enacting the settlement and associated rate relief provisions, the Illinois Power Agency Act establishes a new process for Commonwealth Edison and the Ameren Illinois utilities to procure power for their bundled-rate customers. Beginning July 1, 2008, the two utilities will procure power for bundled-rate customers by means of those full requirements contracts that resulted from the September 2006 auction 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.

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 qualifying facilities under PURPA, power marketers and those qualifying as EWGs under PUHCA 1935, such as Midwest Generation, to more effectively compete in the wholesale market. See "Regulatory Matters—U.S. Federal Energy Regulation" for further detail on legislative developments.

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."

See the discussion on environmental matters and regulations in "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Environmental Matters and Regulations."

At December 31, 2007, Midwest Generation employed 1,075 employees, approximately 740 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.

On June 28, 2001, following unsuccessful negotiations over a new collective bargaining agreement, Local 15 commenced a strike at all the Illinois Plants. With the exception of eight employees who continued working, the entire bargaining unit of approximately 1,150 employees joined the strike. During the course of the strike, 53 additional employees, known as crossover employees, abandoned the strike and returned to work. In late August 2001, Local 15 offered to end the strike, but the offer was not accompanied by an agreement to accept Midwest Generation's collective bargaining offer. Midwest Generation rejected Local 15's offer and instituted a partial "lockout" of striking employees only. Midwest Generation advised Local 15 that those employees who had abandoned the strike earlier in the summer would be allowed to continue working. Local 15 filed an unfair labor practice charge with the NLRB and the NLRB issued a complaint which alleged that Midwest Generation's partial lockout constituted an unlawful act because it did not extend to crossover employees and those employees who did not strike in the first instance.

On September 30, 2004, the NLRB dismissed Local 15's complaint. Local 15 appealed the NLRB's ruling to the United States Court of Appeals for the Seventh Circuit. On October 31, 2005, the Seventh Circuit reversed the NLRB's decision and ordered that the case be sent back to the NLRB with

instructions to find the partial lockout an unfair labor practice, and further ordered the NLRB to consider whether the partial lockout coerced employees into accepting Midwest Generation's contract offer. Midwest Generation and the NLRB sought and were denied rehearing of the October 31 order. The Supreme Court denied further review, and the case has now been remanded to the NLRB. The remedies in unfair labor practice proceedings traditionally include a posting notifying employees of the unfair labor practice, a cease and desist order and, where appropriate, back pay. Given the unique facts and procedures of this case, Midwest Generation cannot predict with certainty the remedy that the NLRB might fashion.

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 factors that influence the market prices for these products in PJM 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. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures."

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. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures—Commodity Price Risk."

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, or that they will not result in net losses.

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 negatively affect Midwest Generation's financial results 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 in support of such forward contracts provides additional liquidity support for implementation of Midwest Generation's contracting strategy for the Illinois Plants. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Results of Operations—Related Party Transactions—EMMT Agreements."

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 with precision the effect that risk management decisions may have on its business, operating results or financial position.

Midwest Generation is exposed to credit and performance risk from third parties under supply and transportation contracts.

The Illinois Plants rely on contracts for the supply and transportation of fuel and other services required for their operation. Midwest Generation's operations are exposed to the risk that counterparties will not perform their obligations. If a counterparty failed to perform under a contract, Midwest Generation would need to obtain alternate suppliers or alternate means of transportation for its requirements of fuel or other services, which could result in higher costs or disruptions in its operations. Furthermore, Midwest Generation is exposed to credit risk because damages related to a breach of contract may not be recoverable. Accordingly, the failure of a supplier to fulfill its contractual obligations could have a material adverse effect on Midwest Generation's financial results.

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 a power plant, the ownership and operations of a power plant, 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.

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 a 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.

For example, in December 2006, Midwest Generation entered into an agreement with the Illinois EPA to reduce mercury, NO_X and SO₂ emissions at the Illinois Plants. Capital expenditures relating to controls contemplated by the agreement have been previously estimated as being in the range of approximately $2.7 billion to $3.4 billion through 2018. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Environmental Matters and Regulations—Air Quality Regulation—Clean Air Interstate Rule." There is no assurance that these capital expenditures will not exceed the above estimates.

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. See "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Environmental Matters and Regulations."

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 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 may not be able to raise capital on favorable terms to fund operations and capital expenditures, which could adversely affect its results of operations.

The factors that influence Midwest Generation's ability to arrange for financing and its costs of capital include:

Recent disruptions in the credit markets have impacted the availability of credit, cost of borrowing, and terms and conditions of new borrowings. 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.

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 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, 2007, Midwest Generation had $1.0 billion in lease financings. See "Item 8. Financial Statements and Supplementary Data—Notes to Consolidated Financial Statements—Note 8. Commitments and Contingencies."

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 independent power industry is characterized by numerous capable competitors, some of whom may have more extensive operating 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.

Further, in recent years some power markets, including PJM, have been characterized by strong and increasing competition as a result of regulatory changes and other factors which can contribute to a reduction in market prices for power from time to time. These regulatory and other changes may increase competitive pressures in this market.

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.

The Illinois Plants may be affected by general operating risks and hazards customary to 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's 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.

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 emissions 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, including gross margin, operating income and balance sheet ratios, will at times be volatile and subject to fluctuations in value primarily due to changes in electricity and fuel prices. For a more detailed discussion of the accounting treatment of Midwest Generation's hedging activities, see "Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations—Market Risk Exposures—Accounting for Energy Contracts."

As of December 31, 2007, 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	Leased/ Owned	Fuel	Megawatts
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. As a result, Midwest Generation is investigating the claims made by the US EPA in the NOV and has identified several defenses which it will raise if the government files suit. At this early stage in the process, 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 $660 million in 2007, $542 million in 2006 and $330 million in 2005.

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.

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 "Item 1. Business—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. 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:

		Page
Management's Overview; Critical Accounting Policies		25
Results of Operations		30
Liquidity and Capital Resources		38
Market Risk Exposures		54

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.

Federal environmental regulations currently require power plants to reduce emissions during 2009 and require states to adopt implementation plans that are equal to or more stringent than the federal requirements. Compliance with these regulations and SIPs could require substantial additional capital expenditures or closure of coal-fired power plants. In advance of the federal requirements, Midwest Generation entered into an agreement with the Illinois EPA on December 11, 2006, to reduce mercury, NO_X and SO₂ emissions at Midwest Generation's Illinois coal-fired power plants, which Midwest Generation believes provides reasonable certainty of the timing and amount of emissions reductions which will be required of the Illinois Plants for these pollutants through 2018. The agreement requires Midwest Generation to achieve specified emissions reductions through a combination of environmental retrofits or unit shutdowns. During 2007, Midwest Generation commenced activities to install activated carbon injection technology to reduce mercury emissions at the Illinois Plants. See "Liquidity and Capital Resources—Environmental Matters and Regulations—Air Quality Regulation—Clean Air Interstate Rule" for further discussion.

The U.S. Congressional leadership has made climate change legislation a priority, and enactment of climate change legislation within the next several years may occur. 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 regulations may vary and may be more stringent and costly than federal legislative proposals currently being debated in Congress. Key uncertainties are 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 impacted parties without cost for a period of time. Furthermore, the rate of decrease in GHG emissions and the cost to purchase allowances would be significant factors in determining whether environmental controls would be economic to install. The potential impact to power generators, like Midwest Generation, will depend upon how these factors and many other considerations are resolved.

In NERC's 2007 Long-Term Reliability Assessment (2007-2016), the forecasted peak demand of electricity in certain regions of the United States will exceed projected committed resources in such regions, resulting in declining reserve margins for capacity. Additional resources that are not currently committed will be needed to maintain system reliability. In PJM, long-term resource planning has been incorporated into its market structure through a new forward capacity market, referred to as RPM. During 2007 and January 2008, PJM completed capacity auctions under the PJM RPM for periods through May 31, 2011. EMMT participated in each auction, which sold forward significant capacity at prices from $40.80 per MW-day to $174.29 per MW-day. The increase in capacity prices determined through the PJM RPM reflects the auction design to encourage increased capacity resources to meet projected demand. As a result of these auctions, Midwest Generation expects capacity revenues to increase significantly through May 31, 2011 as compared to the amounts realized by Midwest Generation

previously. For further discussion regarding the PJM and recent auctions, see "Market Risk Exposures—Commodity Price Risk—Capacity Price Risk."

In May 2007, EME completed a private offering of $1.2 billion of its 7.00% senior notes due 2017, $800 million of its 7.20% senior notes due 2019 and $700 million of its 7.625% senior notes due 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 $999.8 million of its 8.75% second priority senior secured notes due 2034 and to repay the outstanding amount ($327.8 million) of its senior secured term loan facility. Midwest Generation recorded a pre-tax loss of $128.3 million on early extinguishment of debt during the second quarter of 2007.

During the second quarter of 2007, Midwest Generation amended and restated its existing $500 million senior secured working capital facility. The changes to the senior secured working capital facility included a reduction in the interest rate, a longer maturity date, and fewer restrictive covenants. 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.

Midwest Generation's net income increased $57 million in 2007, compared to 2006. The increase in earnings was primarily attributable to:

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 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. 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. 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. At December 31, 2007, the expected undiscounted future cash flow from long-lived assets exceeded the carrying value of those assets.

Midwest Generation has 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." Midwest Generation engaged an independent actuary during 2007 with extensive experience in performing asbestos studies to estimate future losses based on its claims experience and other available information. In calculating future losses, the actuary made various assumptions, 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, 2007, Midwest Generation recorded a liability related to this contract indemnity of $54.5 million.

Statement of Financial Accounting Standards No. 109, "Accounting for Income Taxes" (SFAS No. 109), 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. 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 6. 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 determination of 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
			2007		2006		2005
Operating Revenues (in millions)			$	1,579	$	1,399	$	1,429
Statistics
	Generation (in GWh):
		Energy only contracts		22,503		28,898		30,953
		Load requirements services contracts(1)		7,458		—		—

		Total		29,961		28,898		30,953

	Aggregate plant performance:
		Equivalent availability(2)		75.8%		79.3%		79.6%
		Capacity factor(3)		60.9%		58.8%		63.0%
		Load factor(4)		80.4%		74.1%		79.1%
		Forced outage rate(5)		9.7%		7.9%		7.8%
	Average realized price/MWh:
		Energy only contracts(6)	$	48.79	$	46.19	$	45.55
		Load requirements services contracts(7)	$	63.43	$	—	$	—
	Capacity revenue only (in millions)		$	27	$	24	$	27
	Average fuel costs/MWh		$	13.36	$	13.19	$	12.40

		Years Ended December 31,
		2007			2006			2005
		(in millions)
Operating revenues		$	1,579		$	1,399		$	1,429
Less:
	Load requirements services contracts		(473	)		—			—
	Unrealized losses (gains)		25			(30	)		19
	Other revenues		(33	)		(34	)		(38	)

Realized revenues		$	1,098		$	1,335		$	1,410

Generation (in GWh)			22,503			28,898			30,953
Average realized energy price/MWh		$	48.79		$	46.19		$	45.55

Operating revenues increased $180.4 million in 2007 compared to 2006 and decreased $30.5 million in 2006 compared to 2005. The 2007 increase was primarily due to higher energy revenues. The increase in energy revenues was attributable to higher average realized energy prices and slightly higher generation, partially offset by the timing of unrealized gains and losses related to hedge contracts as described below. The 2006 decrease was primarily attributable to lower energy revenues resulting from lower generation, partially offset by higher average realized energy prices. The decrease in energy revenues was partially offset by an increase in unrealized gains in 2006 related to hedge contracts described below.

Included in operating revenues were unrealized gains (losses) of $(25.1) million, $30.6 million and $(18.3) million in 2007, 2006 and 2005, respectively. Unrealized gains (losses) are primarily due to 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. At December 31, 2007, unrealized losses of $17.6 million were recognized primarily from economic hedges and from the ineffective portion of cash flow hedges related to subsequent periods. The ineffective portion of hedge contracts at the Illinois Plants was primarily attributable to changes in the difference between energy prices at NiHub (the settlement point under forward contracts) and the energy prices at the Illinois Plants busbars (the delivery point where power generated by the Illinois Plants is delivered into the transmission system) resulting from marginal losses. During 2005, power prices increased, resulting in mark-to-market losses on economic hedges. As economic hedge contracts were settled in 2006 the previous unrealized losses resulted in unrealized gains. See "Market Risk Exposures—Accounting for Energy Contracts" for more information.

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 $61.7 million in 2007 compared to 2006 and increased $72.8 million in 2006 compared to 2005. Operating expenses consist of fuel, gain on the sale of emission allowances, plant operations, asset impairment and other charges, depreciation and amortization, gain (loss) from disposal of assets, and administrative and general expenses. The change in the components of operating expenses is discussed below.

Fuel expenses increased $18.2 million in 2007 compared to 2006 and decreased $1.4 million in 2006 compared to 2005. The 2007 increase was primarily attributable to higher coal consumption in 2007, as compared to 2006, resulting from higher generation. The 2006 decrease was primarily attributable to lower coal consumption in 2006, as compared to 2005, resulting from lower generation, partially offset by scheduled price increases and escalation under existing contracts.

Gain on sale of emission allowances was $16.1 million, $14.3 million and $62.3 million for the years ended December 31, 2007, 2006 and 2005, respectively. Midwest Generation sold excess SO₂ emission allowances primarily to affiliates in all three years. The change in sales of SO₂ emission allowances to affiliates was primarily attributable to changes in prices which were $538 per ton in 2007, $475 per ton in 2006 and $1,575 per ton in 2005.

Plant operations expenses increased $50.4 million in 2007 compared to 2006 and increased $18.3 million in 2006 compared to 2005. The 2007 increase was primarily attributable to higher 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. The 2006 increase was primarily due to higher plant maintenance costs in 2006, as compared to 2005.

On November 2, 2007, Unit 5 at the Powerton Station had an unplanned outage related to a low pressure turbine. The turbine was repaired and the unit was returned to service on December 13, 2007. On December 18, 2007, Unit 6 at the Powerton Station had a duct and fan failure resulting in a suspension of operations at this unit through January 4, 2008 when the unit returned at half-load capability. Scheduled maintenance work for the spring of 2008 was accelerated to minimize the aggregate impact of the outage. Repairs were completed on February 13, 2008 and the unit has been returned to service.

Asset impairment charges for 2005 consisted of $7.0 million primarily associated with a redefined capital program related to coal dust mitigation.

Depreciation and amortization expense decreased $2.2 million in 2007 compared to 2006 and increased $0.9 million in 2006 compared to 2005. The 2007 decline was primarily attributable to lower depreciation on emission allowances as a result of selling excess SO₂ allowances over the past three years.

Loss (gain) from disposal of assets was $5.6 million, $11.1 million and $(3.2) million for the years ended December 31, 2007, 2006 and 2005, respectively. The 2007 loss was primarily due to the write-off of the net book value of certain equipment at the Powerton and Joliet Stations. The 2006 loss was primarily due to a $13.5 million write-off of the estimated net book value of some major components that were replaced in 2006, partially offset by a gain of $2.4 million on the sale of peaker equipment. The 2005 gain was primarily related to the sale of Collins Station equipment.

		Years Ended December 31,
		2007			2006			2005
		(in thousands)
Interest and other income		$	7,165		$	4,130		$	848
Interest income from affiliates			114,801			114,993			113,084
Interest expense			(115,071	)		(202,519	)		(207,271	)
Loss on early extinguishment of debt			(128,271	)		—			—

	Total other expense	$	(121,376	)	$	(83,396	)	$	(93,339	)

Interest expense decreased $87.5 million in 2007 compared to 2006 and decreased $4.8 million in 2006 compared to 2005. The 2007 decrease was 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 37.6%, 39.2% and 39.4% in 2007, 2006 and 2005, 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.

Effective December 31, 2005, Midwest Generation adopted Financial Accounting Standard Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations" (FIN 47). For further discussion of FIN 47 see "Asset Retirement Obligations" in Note 3 of "Item 8. Financial Statements and Supplementary Data—Midwest Generation, LLC Notes to Consolidated Financial Statements." Midwest Generation recorded a $1.2 million, after tax, decrease to net income as the cumulative effect of the adoption of FIN 47.

Midwest Generation entered into a revolving credit agreement with EMMT, dated as of April 27, 2004, pursuant to which Midwest Generation can, from time to time, make revolving loans to, and have

letters of credit issued on behalf of, EMMT. The loans and letters of credit provide credit support for forward contracts entered into by EMMT related to the Illinois Plants. Midwest Generation had provided $53.9 million and $43.5 million to EMMT as of December 31, 2007 and 2006, respectively, which EMMT used to provide credit support for 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 contract. The amount repaid includes interest earned, if any, under margining agreements supporting such contracts. Midwest Generation earned interest income of $2.2 million and $2.1 million during 2007 and 2006, respectively. 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.

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

The net fees earned by EMMT were $1.3 million, $1.0 million, $1.5 million for the years ended December 31, 2007, 2006 and 2005, respectively. Midwest Generation had receivables due from EMMT of $107.5 million and $104.4 million at December 31, 2007 and 2006, 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 $(6.6) million, $6.6 million and $54.7 million during 2007, 2006 and 2005, 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 each of the years ended December 31, 2006 and 2005 was $1.1 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 $112.6 million, $112.9 million and $113.1 million during 2007, 2006 and 2005, 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 in due to affiliates on the balance sheet associated with this tax-allocation agreement totaled $63.3 million and $19.1 million at December 31, 2007 and 2006, respectively.

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. Costs incurred for these programs, payroll funding, and other services during the years ended December 31, 2007, 2006 and 2005 were $134.2 million, $125.0 million and $125.7 million, respectively. Midwest Generation had a net payable of $5.1 million and a net receivable of $0.3 million at December 31, 2007 and 2006, respectively, due to/from Edison International related to these programs.

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, 2007, 2006 and 2005 were $13.2 million, $12.3 million and $13.1 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, 2007, 2006 and 2005 were $9.6 million, $7.1 million and $6.9 million, respectively.

Midwest Generation had payables of $2.1 million and $1.5 million due to Midwest Generation EME at December 31, 2007 and 2006 related to these agreements.

In July 2006, the FASB issued FIN No. 48, which clarifies the accounting for uncertain tax positions. FIN No. 48 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. Midwest Generation adopted FIN No. 48 effective January 1, 2007. Adoption of FIN No. 48 did not result in a cumulative-effect adjustment to accumulated deficit.

In February 2006, the FASB issued SFAS No. 155, which amends SFAS No. 133 and SFAS No. 140, "Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities." SFAS No. 155 allows financial instruments that have embedded derivatives to be accounted for at fair value at acquisition, at issuance, or when a previously recognized financial instrument is subject to a remeasurement event, on an instrument-by-instrument basis, in cases in which a derivative would otherwise have to be bifurcated. SFAS No. 155 is effective for all financial instruments acquired, issued, or subject to remeasurement after January 1, 2007. The fair value election provided for in paragraph 4(c) of this Statement may also be applied upon adoption of this Statement for hybrid financial instruments that had been bifurcated under paragraph 12 of SFAS No. 133 prior to the adoption of this Statement. The adoption of this standard had no effect on Midwest Generation's consolidated financial statements for the year ended December 31, 2007.

In April 2007, the FASB issued FIN No. 39-1. FIN No. 39-1 amends paragraph 3 of FIN No. 39 to replace the terms conditional contracts and exchange contracts with the term derivative instruments as

defined in SFAS No. 133. FIN No. 39-1 also states that under master netting arrangements if collateral is based on fair value, then it must be netted with the fair value of derivative assets/liabilities if an entity qualified and elected the option to net those amounts. Midwest Generation will adopt FIN No. 39-1 in the first quarter of 2008. The adoption of FIN No. 39-1 is not expected to have an impact on Midwest Generation's consolidated financial statements.

In February 2007, the FASB issued SFAS No. 159, which provides an option to report eligible financial assets and liabilities at fair value, with changes in fair value recognized in earnings. Midwest Generation will adopt this pronouncement in the first quarter of 2008. Since Midwest Generation elected not to report any current financial assets and liabilities at fair value, the adoption will not result in any cumulative-effect adjustment to accumulated deficit.

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 will adopt SFAS No. 157 in the first quarter of 2008. The adoption is not expected to result in any retrospective adjustment to its consolidated financial statements. The accounting requirements for employers' pension and other postretirement benefit plans is effective at the end of 2008. The effective date will be January 1, 2009 for ARO and other nonfinancial liabilities which are not measured or disclosed on a recurring basis (at least annually).

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

		Page
Consolidated Cash Flow		38
Capital Expenditures		39
Credit Facility and Other Covenants		39
Powerton-Joliet Lease Payments		39
Credit Ratings		40
Contractual Obligations, Commitments and Contingencies		41
Off-Balance Sheet Transactions		45
Environmental Matters and Regulations		45

At December 31, 2007, Midwest Generation had cash and cash equivalents of $64.6 million, compared to $170.8 million at December 31, 2006. Net working capital at December 31, 2007 was $19.1 million, compared to $237.4 million at December 31, 2006. The decline in working capital was primarily the result of a decrease in net current derivative assets, largely driven by an increase in forward prices, a decrease in net receivables from affiliates and a decrease in cash and cash equivalents. Partially offsetting these decreases were an increase in net current deferred tax assets and a decrease in interest payable.

Net cash provided by operating activities totaled $732.6 million, $873.7 million and $145.3 million in 2007, 2006 and 2005, 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 $(10.4) million in 2007, $284.6 million in 2006 and $(328.1) million in 2005. 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.

Net cash used in financing activities totaled $824.5 million, $819.2 million and $256.3 million in 2007, 2006 and 2005, respectively. 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 $106.8 million. In addition, Midwest Generation made distributions of $660.2 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 $541.8 million to its parent, repaid $170 million under its working capital facility, and repaid $103.9 million of its capital lease obligation. In 2005, Midwest Generation paid a $330.2 million distribution to its parent, repaid $493 million of long-term debt, received a $300 million capital contribution from its parent and borrowed $328.4 million of long-term debt.

Net cash provided by (used in) investing activities totaled $(14.2) million, $(7.9) million and $78.9 million in 2007, 2006 and 2005, respectively. 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. The 2006 increase in cash used in investing activities was primarily due to a decrease in the proceeds received from the sale of SO₂ emission allowances, a

decrease in the loan repayments to affiliates in 2006 and the sale of auction rate security investments for $20 million in 2005.

Midwest Generation's principal sources of liquidity are cash on hand, a $500 million working capital facility, payments by EME under the intercompany notes issued in connection with the Powerton-Joliet facilities sale-leaseback and future cash flow from operations. As of December 31, 2007, $2.6 million had been utilized under the working capital facility.

At December 31, 2007, the three-year estimated capital expenditures by Midwest Generation were as follows:

Plant capital expenditures relate to non-environmental projects such as superheater tubes replacements, generator stator rewinds, 4kV switchgear and mill inerting projects. Environmental expenditures relate to various projects to achieve specified emissions reductions such as installation of mercury controls. Midwest Generation plans to fund these expenditures with its working capital facility, cash on hand or cash generated from operations. See further discussion regarding these and possible additional capital expenditures under "—Environmental Matters and Regulations—Air Quality Regulation."

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, 2007, the debt to capitalization ratio was 0.23 to 1. During 2007, Midwest Generation made distributions totaling $660.2 million. In January 2008, Midwest Generation made an additional distribution of $35.0 million.

As part of the sale-leaseback of the Powerton and Joliet Stations, 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 EME, Midwest Generation and EMMT, at December 31, 2007, were as follows:

	Moody's Rating	S&P Rating	Fitch Rating
EME	B1	BB-	BB-
Midwest Generation	Baa3	BB+	BBB-
EMMT	Not Rated	BB-	Not Rated

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 is expected to have cash on hand and has a $500 million working capital facility that can be used to provide credit support for hedging contracts entered into by EMMT related to the Illinois Plants. As of December 31, 2007, $2.6 million was utilized under this facility.

As of December 31, 2007, Midwest Generation had $53.9 million in loans receivable from EMMT. 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.

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, 2007.

				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
Lease financing(1)		$	1,481.4	$	184.9	$	354.9	$	302.6	$	639.0
Operating lease obligations(2)			117.0		16.9		28.0		25.0		47.1
Purchase obligations:
	Capital improvements		43.4		43.4		—		—		—
	Calumet Energy Team contract		12.8		4.0		8.4		0.4		—
	Fuel supply contracts		489.4		194.5		275.1		18.3		1.5
	Coal transportation		557.9		234.3		323.6		—		—
Employee benefit plan contribution(3)			15.7		15.7		—		—		—

Total Contractual Obligations(4)		$	2,717.6	$	693.7	$	990.0	$	346.3	$	687.6

In August 2000, Midwest Generation entered into a sale-leaseback transaction with respect to the Powerton-Joliet power facilities to third-party lessors for an aggregate purchase price of $1.367 billion. Midwest Generation loaned the proceeds from the sale of the facilities to EME. 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, which began January 2, 2001. EME guarantees Midwest Generation's payments under the leases. 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. Midwest Generation can make lease payments from the principal and interest payments it receives from EME under the intercompany notes as well as Midwest Generation's cash flow from operating activities. However, in certain situations, the Powerton-Joliet lease documentation restricts the ability of Midwest Generation to use cash flow from its operating activities to make lease payments. Midwest Generation is also required to pay operating expenses and other expenses, including interest and principal on its debt. The gain on the sale of the power facilities has been deferred and is being amortized over the term of the leases. For more information on Midwest Generation's loans to EME, see "Item 1A. Risk Factors." In the event of a

default under the leases, each lessor can exercise all its rights under the applicable lease, including repossessing the power plant and seeking monetary damages. Each lease sets forth a termination value payable upon termination for default and in certain other circumstances, which generally declines over time and in the case of default may be reduced by the proceeds arising from the sale of the repossessed power plant. A default under the terms of a lease could result in a loss of Midwest Generation's ability to use the power plant subject to that lease, and would have a material adverse effect on Midwest Generation's results of operations and financial position.

At December 31, 2007, Midwest Generation had firm commitments in 2008 for capital expenditures primarily related to superheater tubes replacement, generator stator rewinds, 4kV switchgear and environmental improvements. These capital expenditures are planned to be financed by cash generated from operations.

At December 31, 2007, 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. For further discussion, see "—Market Risk Exposures—Commodity Price Risk—Coal and Transportation Price Risk."

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. 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 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 termination of the Collins Station lease in April 2004, Midwest Generation continues to have obligations under the tax indemnity agreement with the former lease equity investor.

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. 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 2009. Payments are made under this indemnity upon tender by Commonwealth Edison of appropriate proof of liability for an asbestos-related settlement, judgment, verdict, or expense. There were approximately 207 cases for which Midwest Generation was potentially liable and that had not been settled and dismissed at December 31, 2007. Midwest Generation had recorded a $54.5 million liability at December 31, 2007 related to this matter.

various assumptions, 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.

In October 2006, EMMT was advised by the enforcement staff at the FERC that it is prepared to recommend that the FERC initiate a formal investigatory proceeding and seek monetary sanctions against EMMT for alleged violation of the EPAct 2005 and the FERC's rules regarding market behavior, all with respect to certain bidding practices previously employed by EMMT. EMMT is engaged in discussions with the staff to explore the possibility of resolution of this matter. Discussions to date have been constructive and may lead to a settlement agreement acceptable to both parties. Should these discussions not result in a settlement and a formal proceeding commenced, EMMT will be entitled to contest any alleged violations before the FERC and an appropriate court. EMMT has advised Midwest Generation that EMMT believes that it has complied with all applicable laws and regulations in the bidding practices that it employed, and intends to contest vigorously any allegation of violation.

EMMT participated successfully in the first Illinois power procurement auction, held in September 2006 according to rules approved by the Illinois Commerce Commission, and entered into two load requirements services contracts through which it is delivering 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, using contracted supply from Midwest Generation.

As part of the settlement, Midwest Generation agreed to pay $25 million over three years toward approximately $1 billion in utility customer rate relief and startup costs of the new Illinois Power Agency. The remainder is to be funded by subsidiaries of Exelon Corporation, subsidiaries of Ameren, Dynegy Holdings Inc., and Mid-American Energy Company. Also as part of the settlement, all auction-related complaints filed by the Illinois Attorney General at the FERC, the Illinois Commerce Commission and in the Illinois courts were dismissed and the legislature enacted a rate relief plan.

Midwest Generation made a payment of $7.5 million in September 2007 and is obligated to make monthly payments of $750,000 beginning in January 2008 and continuing until the total commitment has been funded. These payments are non-refundable; however, Midwest Generation's obligations to make the monthly payments will cease if, at any time prior to December 2009, Illinois imposes an electric rate freeze or an additional tax on generators. Midwest Generation records the payments made under this agreement as an expense when paid.

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.

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 beginning in 2009 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 emissions 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. The CAIR has been challenged in court by state, environmental and industry groups, which may result in changes to the substance of the rule and to the timetables for implementation.

Midwest Generation expects that compliance with the CAIR and the regulations and revised SIPs developed as a consequence of the CAIR will result in increased capital expenditures and operating expenses. Midwest Generation's approach to meeting these obligations will consist of a blending of capital expenditure and emission allowance purchases that will be based on an ongoing assessment of the dynamics of its market conditions.

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 rule language, called the CPS, and Midwest Generation's obligations under the agreement were conditioned upon the formal adoption of the CPS as a rule. On January 5, 2007, the Illinois EPA and Midwest Generation jointly filed the CPS in the pending state rulemaking related to the Illinois SIP for the CAIR. The CPS became final upon publication in the Illinois Register, which took place on September 7, 2007. Midwest Generation believes that the CPS will provide greater predictability with respect to the timing and amount of emissions reductions that will be required of the Illinois Plants for these pollutants through 2018.

Under the agreement, Midwest Generation will be required to achieve specified emissions reductions through a combination of environmental retrofits or unit shutdowns. The agreement contemplates three phases with each phase relating to one of the pollutants involved. Capital expenditures will be required for each phase.

The first phase involves installing activated carbon injection technology in 2008 and 2009 for the removal of mercury, a technology which Midwest Generation has been testing at some of its plants. Capital expenditures relating to these controls are currently estimated to be approximately $60 million.

The second phase requires the installation of additional controls by the end of 2011 to further reduce NO_X emissions from units to be determined by Midwest Generation in order to achieve an agreed-on fleetwide level of NO_X emissions per million Btu. Capital expenditures for these controls have been previously estimated (in 2006 dollars) to be approximately $450 million. See further discussion below regarding updating the estimated costs of completing environmental improvements.

During the third phase of the plan, the focus will be on the reduction of SO₂ emissions. Midwest Generation will be required either to place controls on several units at the Illinois Plants between 2012 and 2018 for this purpose or to remove the units from service. Midwest Generation will consider many factors in making this choice including, among others, an assessment of the cost and performance of environmental technologies and equipment, the remaining estimated useful life of each affected unit and the market outlook for the prices of various commodities including electrical energy and capacity, coal and natural gas. In view of the many factors involved, Midwest Generation has not yet determined what actions it may take at each affected unit to provide for optimal compliance with the agreement during the third phase. Additional capital expenditures during the third phase of the plan have been previously estimated (in 2006 dollars) as being in the range of approximately $2.2 billion to $2.9 billion, depending on the number of units on which controls are placed versus the number which are removed from service.

Midwest Generation is in the process of completing preliminary engineering and permitting work and is in the process of selecting a final engineering, procurement and construction contractor for the environmental improvements at the Powerton Station. It is expected that detailed scoping necessary to update the cost estimates at the Powerton Station, and then using such information to update the cost estimates for the environmental improvements included in Phases II and III above, will be completed in 2008. Until such information is completed, the capital expenditures estimates may vary substantially for the reasons described above.

On May 30, 2006, the Illinois EPA submitted a proposed regulation to the Illinois Pollution Control Board (PCB) to implement the Illinois SIP required for compliance with the CAIR. The Illinois CAIR rule became final upon publication in the Illinois Register, which took place on September 7, 2007. Because the CPS involves mercury emissions, the US EPA has moved the CPS from the Illinois CAIR SIP to the Illinois CAMR SIP, which was pending final action by the US EPA prior to the February 8, 2008 U.S. Court of Appeals decision vacating the federal CAMR, discussed below. The US EPA approved the Illinois CAIR SIP (without the CPS included) effective as of December 17, 2007.

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. As a result, until the US EPA takes further action in response to the remand, coal-fired electric generating facilities continue to be sources subject to regulation under Section 112 of the CAA and will be obligated to comply, on a case-by-case basis, with technology-based standards to control emissions of hazardous air pollutants (not necessarily limited to mercury) in accordance with the requirements of Section 112. As described below, the Illinois Plants are already subject to significant unit-specific mercury emission reduction requirements under Illinois law. Midwest Generation is assessing the potential impact of this decision on the Illinois regulations, including whether these regulations will turn out to be more or less stringent than case-by-case maximum achievable control technology (also known as MACT) standards or MACT standards that may eventually be promulgated by the US EPA.

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. Buying or selling of emission allowances under the federal CAMR cap-and-trade program would be prohibited.

Midwest Generation's CPS supersedes this rule for the Illinois Plants. The CPS requires installation of activated carbon injection technology for the removal of mercury on all Midwest Generation units by July 2009 (except for three units to be shut down by the end of 2010), prohibits participation in the federal cap-and-trade program, and requires a 90% removal of mercury by unit by the end of 2015.

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. 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 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 July 11, 2007 the US EPA issued a proposed rule to make revisions to the primary and secondary national ambient air quality standards for ozone. With regard to the primary standard for ozone, the US EPA proposes to reduce the level of the 8-hour standard to a level within the range of 0.070 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.

During 2004, the Illinois Plants stayed within their NO_X allocations by augmenting their allocation with early reduction credits generated within the fleet. In 2005, the Illinois Plants used banked allowances, along with some purchased allowances, to stay within their NO_X allocations. In 2006 and 2007, the Illinois Plants used purchased allowances to stay within their NO_X allocations. Midwest Generation plans to continue to purchase allowances as it implements the agreement it reached with the Illinois EPA.

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 2008. The SIP for fine particulates is to be submitted to the US EPA by April 5, 2008.

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 expects, but cannot guarantee, that the reductions required under the agreement and 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. 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. 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. On July 28, 2003, Commonwealth Edison received a substantially similar request for information from the US EPA related to the same plants. In a request dated February 1, 2005, the US EPA submitted a request for additional information to Midwest Generation. Midwest Generation has provided responses to these requests. On August 3, 2007, Midwest Generation received a 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. See "—Contractual Obligations, Commitments and Contingencies—Contingencies—Potential Environmental Proceeding" 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. Pursuant to the regulation, a demonstration study was required when applying for a new or renewed National Pollutant Discharge Elimination System (NPDES) wastewater discharge permit. If one could demonstrate that the costs of meeting the presumptive standards set forth in the regulation were significantly greater than the costs that the US EPA assumed in its rule making or are significantly disproportionate to the expected environmental benefits, a site-specific analysis could be performed to establish alternative standards. Depending on the findings of the demonstration studies, 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. The US EPA is expected to begin another rulemaking process by the end of 2008. EME had begun to collect 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, and those activities are continuing. Although the rule to be generated in the new rulemaking process could have a material impact on Midwest Generation's operations, its compliance criteria have not yet been finalized, and Midwest Generation cannot reasonably determine the financial impact at this time.

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, Joliet and Will County stations all use water from the affected waterways for cooling purposes and the rule, if implemented, is expected to affect the manner in which those stations use water for station cooling.

The proposed rule will be 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 Midwest Generation is a party in those proceedings. At this time, it is not possible to predict the final form of the rule, how it would impact the operation of the affected stations, or the possible compliance costs or liability.

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 $3.4 million at December 31, 2007 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.

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 the current session of the U.S. Congress that would reduce GHG emissions in the U.S. Enactment of climate change legislation within the next several years may occur. 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, whether emission credits 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.

In most of the federal proposals to date, emission allowances would be allocated and distributed without cost in the early years of the emission reduction program, followed by decreasing free allocations and increasing auctions of allowances. 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 thirteen states in the Midwestern Governors' Association including Illinois, Iowa, Kansas, Michigan, Minnesota, and Wisconsin and 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 will complete a model rule by the end of 2008 that will create the framework for the cap-and-trade program. 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, 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 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.

a duty to (i) determine whether GHG emissions of new motor vehicles contribute to climate change or (ii) 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 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.

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:

		Page
Commodity Price Risk		54
Accounting for Energy Contracts		61
Derivative Financial Instruments		62
Credit Risk		62
Interest Rate Risk		63

Midwest Generation's revenues and results of operations of its merchant power plants will depend upon prevailing market prices for capacity, energy, ancillary services, emission allowances or credits, coal, natural gas and fuel oil, and associated transportation costs in PJM. Among the factors that influence the price of energy, capacity and ancillary services in PJM are:

A discussion of commodity price risk for the Illinois Plants is set forth below.

Midwest Generation sells all 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 "earnings 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. Earnings 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 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 limits and counterparty credit exposure limits.

To reduce its exposure to market risk, Midwest Generation hedges a portion of its merchant portfolio risk through EMMT. To the extent that Midwest Generation does not hedge its merchant portfolio, 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 in PJM, and may also be entered into at other trading hubs, including the AEP/ Dayton Hub in PJM and 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 2007, 2006 and 2005.

	24-Hour Northern Illinois Hub Historical Energy Prices(1)
	2007		2006		2005
January	$	35.75	$	42.27	$	38.36
February		56.64		42.66		34.92
March		42.04		42.50		45.75
April		48.91		43.16		38.98
May		44.49		39.96		33.60
June		39.76		34.80		42.45
July		43.40		51.82		50.87
August		57.97		54.76		60.09
September		39.68		31.87		53.30
October		50.14		37.80		49.39
November		43.25		41.90		44.03
December		44.36		33.57		64.99

Yearly Average	$	45.53	$	41.42	$	46.39

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 2008 and calendar year 2009 "strips," which are defined as energy purchases for the entire calendar year, as quoted for sales into the Northern Illinois Hub during 2007:

	24-Hour Northern Illinois Hub Forward Energy Prices(1)
	2008		2009
January 31, 2007	$	44.50	$	45.15
February 28, 2007		44.99		44.85
March 31, 2007		47.92		46.59
April 30, 2007		49.89		49.73
May 31, 2007		50.69		50.46
June 30, 2007		46.09		47.02
July 31, 2007		46.90		48.50
August 31, 2007		44.57		46.49
September 30, 2007		46.80		48.70
October 31, 2007		50.27		51.63
November 30, 2007		47.70		50.37
December 31, 2007		48.06		51.50

The following table summarizes Midwest Generation's hedge position (primarily based on prices at the Northern Illinois Hub) at December 31, 2007:

		2008		2009		2010
Energy Only Contracts(1)
	MWh		10,837,600		7,692,290		3,471,950
	Average price/MWh(2)	$	61.27	$	62.38	$	62.62
Load Requirements Services Contracts
	Estimated MWh(3)		5,613,433		1,631,859		—
	Average price/MWh(4)	$	64.01	$	63.65	$	—
Total estimated MWh			16,451,033		9,324,149		3,471,950

The following table summarizes the status of capacity sales for Midwest Generation at December 31, 2007:

		January 1, 2008 to May 31, 2008		June 1, 2008 to May 31, 2009		June 1, 2009 to May 31, 2010
Fixed Price Capacity Sales
Through RPM Auction, Net
	MW		2,603		3,283		4,614
	Price per MW-day	$	40.80	$	111.92	$	102.04
Non-unit Specific Capacity Sales
	MW		500		880		715
	Price per MW-day	$	21.31	$	64.35	$	71.46

In January 2008, the RPM auction took place for the time period from June 1, 2010 through May 31, 2011 which resulted in a fixed price for Midwest Generation's capacity sold into the auction of $174.29/MW-day. EMMT sold net 4,929 MW of capacity from the Illinois Plants.

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 cost of new entry.

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 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 a settlement point at the

Northern Illinois Hub. Midwest Generation's hedging activities use this settlement point (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 adjusts 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 the past 12 months, the prices at the Northern Illinois Hub were substantially the same as those at the individual busbars of the Illinois Plants, although the implementation of marginal losses on June 1, 2007 has lowered energy prices at the Illinois Plants busbars.

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, 2007 for the next three years.

		2008		2009		2010
Amount of coal under contract in millions of tons(1)		17.5		11.7		11.7

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 2007 from 2006 year-end prices. The 2007 fluctuations in PRB coal prices were in line with normal market price volatility. Prices of PRB coal decreased during 2006 from 2005 year-end prices due to easing natural gas prices, fuel switching, lower prices for SO₂ allowances and improved inventory. The price of PRB coal fluctuated between $8.35 per ton to $11.50 per ton during 2007 and increased to $13.10 per ton at February 15, 2008, as reported by the EIA. In 2006, prices ranged from $20.66 per ton in January 2006 to $9.90 per ton at December 15, 2006. In 2005, the price of PRB coal ranged from $6.20 per ton to $18.48 per ton, as reported by the EIA.

Based on Midwest Generation's anticipated coal requirements in 2008 in excess of the amount under contract, Midwest Generation expects that a 10% change in the price of coal at December 31, 2007 would increase or decrease pre-tax income in 2008 by approximately $1.6 million.

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, see "Management's Overview; Critical Accounting Policies—Critical Accounting Policies—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 flow from operating activities in the consolidated statement of cash flow. The following table summarizes unrealized gains (losses) for the three-year period ended December 31, 2007:

At December 31, 2007, unrealized losses of $17.6 million were recognized from non-qualifying hedge contracts or the ineffective portion of cash flow hedges related to subsequent periods ($13.2 million for 2008, $3.0 million for 2009, and $1.4 million for 2010).

The following table summarizes the fair values for outstanding financial instruments used for hedging activities. The change in fair value of electricity contracts at December 31, 2007 as compared to December 31, 2006 is attributable to an increase in the average market prices for power as compared to contracted prices at December 31, 2007, which is the valuation date.

In assessing the fair value of Midwest Generation's derivative financial instruments, EMMT uses a variety of methods and assumptions based on the market conditions and associated risks existing at each balance sheet date. 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. A 10% change in the market price at December 31, 2007 would increase or decrease the fair value of outstanding derivative commodity price contracts by $135.0 million. The following table summarizes the maturities and the related fair value, based on actively traded prices, of Midwest Generation's commodity derivative assets and liabilities as of December 31, 2007 (in thousands):

		Total Fair Value		Maturity <1 year		Maturity 1 to 3 years		Maturity 4 to 5 years		Maturity >5 years
Prices actively quoted		$	(91,177	)	$	(25,964	)	$	(65,213	)	$	—		$	—

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 liquidated 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 would be incurred if counterparties failed to perform pursuant to the terms of their 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. Processes have also been established to determine and monitor the creditworthiness of counterparties. EMMT manages the credit risk on the portfolio 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 49% of Midwest Generation's consolidated operating revenues for the year ended December 31, 2007. Moody's rates PJM's senior unsecured 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 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 30% of Midwest Generation's consolidated operating revenues for the year ended December 31, 2007. Commonwealth Edison's senior unsecured debt rating was downgraded below investment grade by S&P in June 2007 and by Moody's in March 2007.

Interest rate changes can affect earnings and the cost of capital needed to make 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, 2007, Midwest Generation had no borrowings outstanding.

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."

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

Midwest Generation's management, 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 control over financial reporting, as defined in Exchange Act Rule 13a-15(f). 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 control 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 control over financial reporting was effective as of December 31, 2007.

There were changes as described below in Midwest Generation's internal control 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 control over financial reporting.

During 2007, Midwest Generation implemented a series of SAP ERP modules, including the general ledger, chart of accounts, consolidation, reporting, and accounts payable. In addition, procurement and materials management and fuel management systems were implemented at the Illinois Plants. The introduction of these ERP modules and the related workflow capabilities resulted in changes to Midwest Generation's financial reporting controls and procedures, with such changes identified during the implementation of the ERP modules. Midwest Generation has modified the design and documentation of internal control processes and procedures relating to the new system to supplement and complement existing internal controls over financial reporting. 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 control 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, 2007 and 2006, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2007 in conformity with accounting principles generally accepted in the United States of America. These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

As discussed in Note 1 to the consolidated financial statements, the Company changed the manner in which it accounts for uncertain tax positions as of January 1, 2007. As discussed in Note 7 to the consolidated financial statements, the Company changed the manner in which it accounts for defined benefit pension plans and other postretirement plans as of December 31, 2006. As discussed in Note 3 to the consolidated financial statements, the Company changed the manner in which it accounts for asset retirement costs as of December 31, 2005.

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

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

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

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

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 thousand. 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, 2007, 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. Certain prior year reclassifications have been made to conform to the current year financial statement presentation.

The preparation of financial statements in conformity with generally accepted accounting principles 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 time deposits and other investments totaling $64.5 million and $170.6 million at December 31, 2007 and 2006, respectively, with original maturities of three months or less.

At December 31, 2007 and 2006, Midwest Generation had no short-term investments. Midwest Generation sold all $20 million of its investments in auction rate securities in 2005.

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, 2007 and 2006 amounted to $0.6 million and $13.0 million, respectively. Amortization of deferred financing costs charged to operations was $2.6 million and $5.3 million in 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 $63.3 million at December 31, 2007 and $19.1 million at December 31, 2006 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 the caption "Provision for income taxes" on the consolidated statements of income. For further discussion of income taxes, see Note 6—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, natural gas, coal and fuel oil and is stated at the lower of weighted average cost or market.

In April 2007, the FASB issued FIN No. 39-1. FIN No. 39-1 amends paragraph 3 of FIN No. 39 to replace the terms conditional contracts and exchange contracts with the term derivative instruments as

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 Midwest Generation's consolidated balance sheet, composed entirely of collateral reserves, was $3.3 million and $4.3 million at December 31, 2007 and 2006, 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.

Unrealized losses on cash flow hedges, net of tax, at December 31, 2007, included unrealized losses on commodity hedges primarily related to futures and forward energy sales contracts that qualify for hedge accounting. These losses arise because current forecasts of future electricity prices are greater than the contract prices. As Midwest Generation's hedged positions are realized, $1.7 million, after tax, of the net unrealized losses on cash flow hedges at December 31, 2007 are expected to be reclassified into earnings during the next 12 months. Management expects that reclassification of net unrealized losses will decrease 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, 2010.

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 losses of $13.0 million, $1.5 million and $2.5 million during the years ended December 31, 2007, 2006 and 2005, respectively, representing the

amount of cash flow hedges' ineffectiveness, reflected in operating revenues in Midwest Generation's consolidated income statements.

At December 31, 2007 and 2006, property, plant and equipment consisted of the following:

	2007		2006
	(in thousands)
Land	$	33,209	$	33,209
Power plant facilities		1,939,928		1,960,203
Emission allowances		834,203		834,203
Construction in progress		33,726		15,494
Equipment, furniture and fixtures		12,806		11,204
Plant and equipment under lease financing		1,349,783		1,356,430

		4,203,655		4,210,743
Less accumulated depreciation		1,094,431		990,409

Property, plant and equipment, net	$	3,109,224	$	3,220,334

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, 2007). The amount of assets pledged or mortgaged totals approximately $2.8 billion at December 31, 2007. 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 $42.2 million, $42.4 million and $42.6 million for 2007, 2006 and 2005, respectively. Accumulated amortization related to the leased facilities was $309.5 million and $268.8 million at December 31, 2007 and 2006, respectively.

Effective January 1, 2003, Midwest Generation adopted Statement of Financial Accounting Standards No. 143, "Accounting for Asset Retirement Obligations." SFAS No. 143 requires entities to record the fair value of a liability for an ARO in the period in which it is incurred. When the 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 March 2005, the FASB issued FIN 47, "Accounting for Conditional Asset Retirement Obligations," an interpretation of SFAS No. 143. This interpretation clarifies that an entity is required to recognize 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. This interpretation became effective as of December 31, 2005 for Midwest Generation. Midwest Generation identified conditional AROs related to asbestos removal and disposal costs at its owned buildings and power plant facilities and

at retired structures leased at the Powerton Station, and recorded a $1.2 million, after tax, charge as a cumulative effect of a change in accounting. Midwest Generation has not recorded a liability related to the owned structures because it cannot reasonably estimate fair value of the obligation at this time. The range of time over which Midwest Generation may settle this obligation 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:

	2007			2006			2005
	(in thousands)
Beginning balance	$	4,020		$	2,220		$	291
Cumulative effect of accounting change		—			—			1,900
Liabilities settled during the period		(3,411	)		(892	)		—
Accretion expense		35			32			29
Change in estimates		—			2,660			—

Ending balance	$	644		$	4,020		$	2,220

The pro forma net income and liability impacts of adopting FIN 47 are immaterial.

On May 7, 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 $999.8 million of its 8.75% second priority senior secured notes due 2034 and to repay the outstanding amount ($327.8 million) of its senior secured term loan facility. Midwest Generation recorded a pre-tax loss of $128.3 million ($78.8 million after tax) on early extinguishment of debt during the second quarter of 2007. Midwest Generation had $1 billion outstanding on its 8.75% second priority senior secured notes and $330 million outstanding on its senior secured term loan facility at December 31, 2006.

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%. 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, 2007, Midwest Generation had no borrowings outstanding and $2.6 million of letters of credit had been utilized under its working capital facility. As of December 31, 2006, Midwest Generation had no borrowings outstanding and $4.6 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.

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:

In assessing the fair value of Midwest Generation's long-term obligations, Midwest Generation uses quoted market prices.

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 represent 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 "earnings 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. Earnings 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 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 limits and counterparty credit exposure limits.

The following table summarizes the carrying amounts and fair values for outstanding financial instruments used for hedging activities. The change in fair value of electricity contracts in 2007 as compared to 2006 is attributable to the increase in average market prices for power as compared to contracted prices at December 31, 2007, which is the valuation date, causing the fair value of the contracts to become liabilities instead of assets.

In assessing the fair value of Midwest Generation's electricity contracts, Midwest Generation uses a variety of methods and assumptions based on market conditions and associated risks existing at each balance sheet date. The fair value of the electricity contracts takes into account quoted market prices, time value of money, volatility of the underlying commodities and other factors.

Midwest Generation classifies unrealized gains and losses from energy contracts as part of operating revenues. The following table summarizes unrealized gains (losses) for the three-year period ended December 31, 2007:

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 4—Long-term Debt and Note 9—Related Party Transactions—EMMT Agreements.

their 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. Processes have also been established to determine and monitor the creditworthiness of counterparties. EMMT manages the credit risk on the portfolio 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.

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 49%, 67% and 75% of Midwest Generation's consolidated operating revenues for the years ended December 31, 2007, 2006 and 2005, respectively. Moody's rates PJM's senior unsecured 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.

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 asset (liability) were:

			Years Ended December 31,
			2007			2006
			(in thousands)
Deferred tax assets
	Lease financing		$	44,500		$	38,909
	Derivative assets			47,106			—
	Accrued expenses			11,712			13,148
	Credit carryforward			12,265			19,117
	Net operating loss carryforward			2,583			98,315

		Total	$	118,166		$	169,489

Deferred tax liabilities
	Derivative liabilities		$	1,302		$	31,305
	Property, plant and equipment—basis differences			168,552			123,625
	Employee benefits			—			—
	State taxes			—			(5,231	)
	Other			—			(3,096	)

		Total		169,854			146,603

Deferred tax asset (liability), net			$	(51,688	)	$	22,886

Classification of accumulated deferred income taxes:
	Included in current assets		$	15,981		$	—
	Included in non-current assets		$	—		$	46,277
	Included in current liabilities		$	—		$	23,391
	Included in non-current liabilities		$	67,669		$	—

Midwest Generation has no federal or California net operating loss carryforwards at December 31, 2007. In addition, Midwest Generation has $26 million of Illinois net operating loss carryforwards at December 31, 2007 which expire beginning in 2015. The provision for income taxes is comprised of the following:

			Years Ended December 31,
			2007		2006		2005
			(in thousands)
Current
	Federal		$	128,292	$	4,414	$	11,414
	State			19,022		1,686		2,149

		Total current	$	147,314	$	6,100	$	13,563

Deferred
	Federal		$	28,324	$	130,808	$	152,239
	State			7,324		22,022		31,012

		Total deferred		35,648		152,830		183,251

Provision for income taxes			$	182,962	$	158,930	$	196,814

			Years Ended December 31,
			2007			2006			2005
			(in thousands)
Provision for federal income taxes at statutory rate			$	170,246		$	142,008		$	174,702
Increase (decrease) in taxes from:
	State tax, net of federal benefit			16,334			14,947			21,554
	Other			(3,618	)		1,975			558

		Total provision for income taxes	$	182,962		$	158,930		$	196,814

Effective tax rate				37.6	%		39.2	%		39.4	%

None of the unrecognized tax benefits as of December 31, 2007 and the date of adoption, if recognized, would affect the effective tax rate. The total amount of accrued interest and penalties was $1.6 million and $2.1 million as of December 31, 2007 and the date of adoption, respectively. 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 all or a portion of the unrecognized tax benefits through tax year 2002 within the next 12 months. 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 for the years ended December 31, 2007, 2006 and 2005 was $2.9 million, $2.7 million and $2.6 million, respectively.

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 offset through other comprehensive income. Midwest Generation adopted SFAS No. 158 prospectively on December 31, 2006. SFAS No. 158 also requires companies to align the measurement dates for their plans to their fiscal year-ends; Midwest Generation already has a fiscal year-end measurement date for all of its postretirement plans. Upon adoption, Midwest Generation recorded additional postretirement benefit liabilities of $8.5 million (included in benefit plans and other long-term liabilities) and a reduction to accumulated other comprehensive income (a component of member's equity) of $5.2 million, net of tax.

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 $15.2 million for the year ended December 31, 2008. The amount is subject to change depending on the funded status at year-end and the tax deductible funding limitations.

			Years Ended December 31,
			2007			2006
			(in thousands)
Change in projected benefit obligation
	Projected benefit obligation at beginning of year		$	95,984		$	83,382
	Service cost			11,945			11,651
	Interest cost			5,344			4,445
	Change in plan provision			(5	)		—
	Actuarial gain			(9,446	)		(2,314	)
	Benefits paid			(1,716	)		(1,180	)

		Projected benefit obligation at end of year	$	102,106		$	95,984

Change in plan assets
	Fair value of plan assets at beginning of year		$	65,299		$	49,638
	Actual return on plan assets			5,729			8,409
	Employer contributions			10,017			8,432
	Benefits paid			(1,716	)		(1,180	)

		Fair value of plan assets at end of year	$	79,329		$	65,299

Funded status at end of year			$	(22,777	)	$	(30,685	)

Amounts recognized in consolidated balance sheets:
	Long-term liabilities		$	22,777		$	30,685
Amounts recognized in accumulated other comprehensive income (loss):
Prior service cost			$	1,837		$	2,073
Net loss (gain)				(10,867	)		741
Accumulated benefit obligation at end of year			$	86,762		$	80,260
Pension plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation			$	102,106		$	95,984
Accumulated benefit obligation				86,762			80,260
Fair value of plan assets				79,329			65,299
Weighted-average assumptions used to determine obligations at end of year:
Discount rate				6.25%			5.75%
Rate of compensation increase				5.0%			5.0%

	Years Ended December 31,
	2007			2006			2005
	(in thousands)
Service cost	$	11,945		$	11,651		$	12,143
Interest cost		5,344			4,445			3,746
Expected return on plan assets		(5,103	)		(3,934	)		(3,002	)
Net amortization		65			231			507

Total expense	$	12,251		$	12,393		$	13,394

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

	Year Ended December 31, 2007
	(in thousands)
Net gain	$	(11,319	)
Prior service credit		(236	)
Amortization of prior service credit		(231	)
Amortization of net gain		166

Total in other comprehensive loss	$	(11,620	)

Total in expense and other comprehensive loss	$	631

The estimated amortization amounts reclassified from other comprehensive loss for 2008 are $230,000 for prior service costs and $(211,000) 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 $0.5 million for the year ended December 31, 2008. This amount is subject to change depending on the funded status at year-end and the tax deductible funding limitations.

			Years Ended December 31,
			2007			2006
			(in thousands)
Change in benefit obligation
	Benefit obligation at beginning of year		$	26,833		$	25,162
	Service cost			706			656
	Interest cost			1,745			1,436
	Actuarial loss (gain)			1,288			(76	)
	Benefits paid			(438	)		(345	)

		Benefit obligation at end of year	$	30,134		$	26,833

Change in plan assets
	Fair value of plan assets at beginning of year		$	—		$	—
	Employer contributions			438			345
	Benefits paid			(438	)		(345	)

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

Funded status at end of year			$	(30,134	)	$	(26,833	)

Amounts recognized in consolidated balance sheets:
	Long-term liabilities		$	30,134		$	26,833
Amounts recognized in accumulated other comprehensive income (loss):
Prior service credit			$	(2,513	)	$	(3,228	)
Net loss				9,252			8,903
Weighted-average assumptions used to determine obligations at end of year:
Discount rate				6.25%			5.75%
Assumed health care cost trend rates:
Rate assumed for following year				9.25%			9.25%
Ultimate rate				5.0%			5.0%
Year ultimate rate reached				2015			2011

	Years Ended December 31,
	2007			2006			2005
	(in thousands)
Service cost	$	706		$	656		$	582
Interest cost		1,745			1,436			1,288
Amortization of prior service costs		(715	)		(715	)		(715	)
Amortization of net loss		939			763			652

Total expense	$	2,675		$	2,140		$	1,807

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

The estimated amortization amounts reclassified from other comprehensive loss for 2008 are $(715,000) for prior service credit and $612,000 for net loss.

	Years Ended December 31,
	2007	2006	2005
Weighted-average assumptions used to determine expense:
Discount rate	5.75%	5.5%	5.75%
Assumed health care cost trend rates:
Current year	9.25%	10.25%	10.0%
Ultimate rate	5.0%	5.0%	5.0%
Year ultimate rate reached	2015	2011	2010

Increasing the health care cost trend rate by one percentage point would increase the accumulated benefit obligation as of December 31, 2007 by $5.0 million and annual aggregate service and interest costs by $0.4 million. Decreasing the health care cost trend rate by one percentage point would decrease the accumulated benefit obligation as of December 31, 2007 by $4.3 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. Three yield curves were considered: two corporate yield curves (Citigroup and AON) and a curve based on treasury rates (plus 90 basis points). Midwest Generation also compared the yield curve analysis against the Moody's AA Corporate bond rate.

Description of Pension and Postretirement Benefits Other Than Pensions Investment Strategies

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. Midwest Generation employs multiple investment management firms. Investment managers within each asset class cover a range of investment styles and approaches. Risk is controlled 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 5%. 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 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.

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 data and is consistent with experience over various economic environments. The premium of the broad market over United States government bonds is a historic average premium. The estimated rate of return for equity is estimated to be a 3% premium over the estimated total return of intermediate United States government bonds. This value is determined by combining estimates of real earnings growth, dividend yields and inflation, each

of which is determined using historical analysis. 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 2020.

At December 31, 2007, the future operating and lease financing commitments were as follows:

Years Ending December 31,	Operating Leases		Lease Financing
	(in thousands)
2008	$	16,908	$	184,930
2009		14,321		184,941
2010		13,682		169,973
2011		12,844		151,316
2012		12,160		151,310
Thereafter		47,107		638,997

Total future commitments	$	117,022	$	1,481,467

Amount representing interest				451,663

Net commitments			$	1,029,804

Operating lease expense amounted to $19.7 million, $18.6 million and $18.0 million in 2007, 2006 and 2005, respectively.

On August 24, 2000, Midwest Generation entered into a sale-leaseback transaction with respect to the Powerton and Joliet power facilities 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 first right of 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.

At December 31, 2007, Midwest Generation had firm commitments to spend approximately $43.4 million on capital expenditures in 2008 primarily related to superheater tubes replacement, generator stator rewinds, 4kV switchgear and environmental improvements. These capital expenditures are planned to be financed by 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 $12.8 million in the next four years, summarized as follows: 2008—$4.0 million; 2009—$4.1 million; 2010—$4.3 million; and 2011—$0.4 million.

At December 31, 2007, 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 $487.9 million in the next five years, summarized as follows: 2008—$194.5 million; 2009—$134.8; 2010—$140.3 million; 2011—$9.1 million; and 2012—$9.2 million.

At December 31, 2007, 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 fuel supply contracts. Based on the committed coal volumes in the fuel supply contracts described above, these minimum commitments are currently estimated to aggregate $557.9 million in the next three years, summarized as follows: 2008—$234.3 million; 2009—$160.2 million; and 2010—$163.4 million.

Station lease in April 2004, Midwest Generation continues to have obligations under the tax indemnity agreement with the former lease equity investor.

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 2009. Payments are made under this indemnity upon tender by Commonwealth Edison of appropriate proof of liability for an asbestos-related settlement, judgment, verdict, or expense. There were approximately 207 cases for which Midwest Generation was potentially liable and that had not been settled and dismissed at December 31, 2007. Midwest Generation had recorded a $54.5 million and $64.6 million liability at December 31, 2007 and 2006, respectively, related to this matter.

Midwest Generation engaged an independent actuary in 2004 to complete an estimate of future losses. Based on the actuary's analysis, Midwest Generation recorded an undiscounted liability for its indemnity for future asbestos claims through 2045. During the fourth quarter of 2007, the actuary report was updated and the liability reduced by $9 million. In calculating future losses, the actuary made various assumptions, 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.

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. As a result, Midwest Generation is investigating the claims made by the US EPA in the NOV and has identified several defenses which it will raise if the government files suit. At this early stage in the process, Midwest Generation cannot predict the outcome of this matter or estimate the impact on its facilities, its results of operations or financial position.

previously estimated (in 2006 dollars) to be approximately $450 million. See further discussion below regarding updating the estimated costs of completing environmental improvements.

control technology (also known as MACT) standards or MACT standards that may eventually be promulgated by the US EPA.

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

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. On July 28, 2003, Commonwealth Edison received a substantially similar request for information from the US EPA related to the same plants. In a request dated February 1, 2005, the US EPA submitted a request for additional information to Midwest Generation. Midwest Generation has provided responses to these requests. On August 3, 2007, Midwest Generation received a 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. See "—Commitments and Contingencies—Contingencies—Potential Environmental Proceeding" for further discussion.

The speed with which federal regulations and legislation will be adopted will depend in part on decisions rendered in climate change litigation pending before several federal and state courts and the US EPA's response to those decisions. 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 (i) determine whether GHG emissions of new motor vehicles contribute to climate change or (ii) 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.

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.

Midwest Generation entered into a revolving credit agreement with EMMT, dated as of April 27, 2004, pursuant to which Midwest Generation can, from time to time, make revolving loans to, and have letters of credit issued on behalf of, EMMT. The loans and letters of credit provide credit support for forward contracts entered into by EMMT related to the Illinois Plants. Midwest Generation had provided $53.9 million and $43.5 million to EMMT as of December 31, 2007 and 2006, respectively, which EMMT used to provide credit support for 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 contract. The amount repaid includes interest earned, if any, under margining agreements supporting such contracts. Midwest Generation earned interest income of $2.2 million and $2.1 million during 2007 and 2006, respectively. The maximum amount of available credit under the agreement is $500 million.

reasonable. Costs incurred for these programs, payroll funding, and other services during the years ended December 31, 2007, 2006 and 2005 were $134.2 million, $125.0 million and $125.7 million, respectively. Midwest Generation had a net payable of $5.1 million and a net receivable of $0.3 million at December 31, 2007 and 2006, respectively, due to/from Edison International related to these programs.

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, 2007, 2006 and 2005 were $13.2 million, $12.3 million and $13.1 million, respectively.

Midwest Generation had payables of $2.1 million and $1.5 million due to Midwest Generation EME at December 31, 2007 and 2006 related to these agreements.

		Years Ended December 31,
		2007			2006		2005
		(in thousands)
Cash paid (received)
	Interest	$	135,418		$	200,568	$	206,893
	Income taxes	$	(3,250	)	$	—	$	—
Non-cash financing activities
	Reduction in affiliate debt due to tax-allocation agreement offset	$	—		$	3,250	$	—

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, 2007 and December 31, 2006, 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, 2007, 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.

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.

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)

MMBtu		million British thermal units
Moody's		Moody's Investors Service, Inc.
MW		megawatts
MWh		megawatt-hours
NERC		North American Electric Reliability Corporation
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
SECA(s)		Seams Elimination Cost Adjustment(s)
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. 155		Statement of Financial Accounting Standards No. 155, "Accounting for Certain Hybrid Financial Instruments"
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. 159		Statement of Financial Accounting Standards No. 159, "Fair Value Option for Financial Assets and Liabilities, Including an Amendment of FASB Statement No. 115"
SIP(s)		state implementation plan(s)
SO₂		sulfur dioxide
US EPA		United States Environmental Protection Agency

		Years Ended December 31,
		2007			2006			2005			2004			2003
		(in millions)
INCOME STATEMENT DATA
Operating revenues		$	1,579.3		$	1,398.9		$	1,429.4		$	1,057.7		$	1,052.3
Operating expenses
	Fuel and plant operations		803.9			737.1			672.2			759.9			723.7
	Depreciation and amortization		139.9			142.1			141.1			169.9			171.7
	Loss on lease termination, asset impairment and other charges(1)		5.5			11.2			3.8			105.7			1,024.5
	Administrative and general		22.2			19.4			19.8			21.6			23.8

			971.5			909.8			836.9			1,057.1			1,943.7

Operating income (loss)			607.8			489.1			592.5			0.6			(891.4	)
Interest and other expense			(121.4	)		(83.4	)		(93.3	)		(137.4	)		(234.2	)

Income (loss) before income taxes			486.4			405.7			499.2			(136.8	)		(1,125.6	)
Provision (benefit) for income taxes			182.9			158.9			196.8			(58.2	)		(436.9	)

Income (loss) before accounting change			303.5			246.8			302.4			(78.6	)		(688.7	)
Cumulative effect of change in accounting, net of tax(2)			—			—			(1.2	)		—			(0.1	)

Net income (loss)		$	303.5		$	246.8		$	301.2		$	(78.6	)	$	(688.8	)

	As of December 31,
	2007		2006		2005		2004		2003
	(in millions)
BALANCE SHEET DATA
Assets	$	4,912.4	$	5,283.6	$	5,802.3	$	5,683.5	$	5,662.6
Current liabilities		389.4		363.4		446.4		251.8		981.7
Long-term debt		—		1,326.1		1,499.5		1,660.5		2,085.9
Lease financing		911.5		1,029.8		1,140.8		1,244.7		2,159.6
Other long-term obligations		294.1		183.6		197.9		164.1		103.3
Member's equity		3,317.4		2,380.6		2,517.7		2,362.4		332.1

	Years Ended December 31,
	2007			2006			2005			2004			2003
	(in millions)
CASH FLOW DATA
Cash provided by operating activities	$	732.6		$	873.7		$	145.3		$	190.5		$	97.2
Cash used in financing activities		(824.5	)		(819.2	)		(256.3	)		(37.8	)		(94.8	)
Cash provided by (used in) investing activities		(14.2	)		(7.9	)		78.9			(33.0	)		(40.6	)

Ameren		Ameren Corporation
ARO		asset retirement obligations
Btu		British thermal units
CAA		Clean Air Act
CAIR		Clean Air Interstate Rule
CAMR		Clean Air Mercury Rule
Commonwealth Edison		Commonwealth Edison Company
CPS		Combined Pollutant Standard
DOJ		United States Department of Justice
EIA		Energy Information Administration
EME		Edison Mission Energy
EMMT		Edison Mission Marketing & Trading, Inc.
EPAct 2005		Energy Policy Act of 2005
ERP		enterprise resource planning
EWG(s)		exempt wholesale generator(s)
Exelon Generation		Exelon Generation Company LLC
FASB		Financial Accounting Standards Board
FERC		Federal Energy Regulatory Commission
FIN No. 39-1		Financial Accounting Standards Board Staff Position No. 39-1, "Amendment of FASB Interpretation No. 39"
FIN No. 48		Financial Accounting Standards Interpretation No. 48, "Accounting for Uncertainty in Income Taxes"
Fitch		Fitch Ratings
FPA		Federal Power Act
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

	2008		2009		2010
	(in millions)
Plant capital expenditures	$	63.5	$	70.8	$	42.2
Environmental expenditures		46.4		57.6		245.9

Total	$	109.9	$	128.4	$	288.1

		December 31, 2007			December 31, 2006
		(in thousands)
Commodity price:
	Electricity contracts	$	(91,177	)	$	93,983

Financial Statements:
	Report of Independent Registered Public Accounting Firm	66
	Consolidated Statements of Income for the years ended December 31, 2007, 2006 and 2005	67
	Consolidated Balance Sheets at December 31, 2007 and 2006	68
	Consolidated Statements of Member's Equity for the years ended December 31, 2007, 2006 and 2005	69
	Consolidated Statements of Comprehensive Income for the years ended December 31, 2007, 2006 and 2005	70
	Consolidated Statements of Cash Flows for the years ended December 31, 2007, 2006 and 2005	71
	Notes to Consolidated Financial Statements	72

			December 31,
			2007			2006
Assets
Current Assets
	Cash and cash equivalents		$	64,581		$	170,755
	Due from affiliates			107,665			104,666
	Fuel inventory			69,423			64,900
	Spare parts inventory			23,004			20,390
	Loans to affiliate for margin deposits			53,893			43,450
	Interest receivable from affiliate			55,976			56,097
	Derivative assets			2,579			132,221
	Deferred taxes			15,981			—
	Intangible assets			2,988			190
	Other current assets			12,437			8,133

		Total current assets		408,527			600,802

Property, Plant and Equipment				4,203,655			4,210,743
	Less accumulated depreciation			1,094,431			990,409

		Net property, plant and equipment		3,109,224			3,220,334

Notes receivable from affiliate				1,356,368			1,359,276
Deferred taxes				—			46,277
Long-term derivative assets				3,114			19,288
Long-term intangible assets				19,221			—
Other assets				15,963			37,593

Total Assets			$	4,912,417		$	5,283,570

Liabilities and Member's Equity
Current Liabilities
	Accounts payable		$	29,403		$	11,467
	Book overdrafts			1,858			1,761
	Accrued liabilities			95,292			82,953
	Due to affiliates			81,933			21,522
	Interest payable			34,098			57,072
	Derivative liabilities			28,543			50,874
	Deferred taxes			—			23,391
	Current maturities of long-term obligations			—			3,450
	Current portion of lease financing			118,267			110,956

		Total current liabilities		389,394			363,446

Lease financing, net of current portion				911,538			1,029,805
Long-term obligations				—			1,326,096
Deferred taxes				67,669			—
Long-term derivative liabilities				68,327			6,652
Benefit plans and other long-term liabilities				158,137			176,933

Total Liabilities				1,595,065			2,902,932

Commitments and Contingencies (Note 8)
Member's Equity
	Membership interests, no par value; 100 units authorized, issued and outstanding (Note 1)			—			—
	Additional paid-in capital			3,587,224			2,862,485
	Accumulated deficit			(226,068	)		(529,524	)
	Accumulated other comprehensive income (loss)			(43,804	)		47,677

Total Member's Equity				3,317,352			2,380,638

Total Liabilities and Member's Equity			$	4,912,417		$	5,283,570

		Membership Interests		Additional Paid-In Capital			Accumulated Deficit			Accumulated Other Comprehensive Income (Loss)			Member's Equity
Balance at December 31, 2004		$	—	$	3,434,488		$	(1,077,507	)	$	5,441		$	2,362,422
	Equity contribution		—		300,000			—			—			300,000
	Net income		—		—			301,175			—			301,175
	Other comprehensive loss		—		—			—			(115,731	)		(115,731	)
	Cash distribution to parent		—		(330,209	)		—			—			(330,209	)

Balance at December 31, 2005			—		3,404,279			(776,332	)		(110,290	)		2,517,657

	Net income		—		—			246,808			—			246,808
	Other comprehensive income		—		—			—			163,157			163,157
	Adjustment to initially apply SFAS No. 158, net of tax		—		—			—			(5,190	)		(5,190	)
	Cash distribution to parent		—		(541,794	)		—			—			(541,794	)

Balance at December 31, 2006			—		2,862,485			(529,524	)		47,677			2,380,638

	Equity contribution		—		1,385,000			—			—			1,385,000
	Net income		—		—			303,456			—			303,456
	Other comprehensive loss		—		—			—			(91,481	)		(91,481	)
	Cash distribution to parent		—		(660,261	)		—			—			(660,261	)

Balance at December 31, 2007		$	—	$	3,587,224		$	(226,068	)	$	(43,804	)	$	3,317,352

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		30-33.75 years

		Unrealized Gains (Losses) on Cash Flow Hedges			Unrecognized Losses and Prior Service Costs, Net(2)			Accumulated Other Comprehensive Income (Loss)
		(in thousands)
Balance at December 31, 2005		$	(110,290	)	$	—		$	(110,290	)
	Change for 2006		163,157			—			163,157
	SFAS No. 158 adjustments(1)		—			(5,190	)		(5,190	)

Balance at December 31, 2006			52,867			(5,190	)		47,677
	Change for 2007		(98,069	)		6,588			(91,481	)

Balance at December 31, 2007		$	(45,202	)	$	1,398		$	(43,804	)

		December 31, 2007				December 31, 2006
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
		(in thousands)
Instruments
Non-derivatives:
	Long-term obligations	$	—	$	—	$	1,329,546	$	1,441,418

		December 31, 2007						December 31, 2006
		Carrying Amount			Fair Value			Carrying Amount		Fair Value
		(in thousands)
Commodity price:
	Electricity contracts	$	(91,177	)	$	(91,177	)	$	93,983	$	93,983

		(in thousands)
Balance, January 1, 2007		$	21,255
Tax positions taken during the current year
	Increases		209
	Decreases		—
Tax positions taken during a prior year
	Increases		—
	Decreases		289

Balance, December 31, 2007		$	21,175

Years Ending December 31,	(in thousands)
2008	$	2,263
2009		3,010
2010		3,907
2011		5,121
2012		6,450
2013-2017		57,141

		December 31,
	Target for 2008	December 31,
	Target for 2008	2007	2006
United States equity	45%	47%	47%
Non-United States equity	25%	25%	26%
Private equity	4%	2%	2%
Fixed income	26%	26%	25%

2007	First		Second			Third(i)		Fourth		Total
	(in thousands)
Operating revenues	$	431,408	$	333,711		$	448,551	$	365,593	$	1,579,263
Operating income		192,814		88,231			206,844		119,905		607,794
Provision (benefit) for income taxes		67,097		(17,931	)		84,588		49,208		182,962
Net income (loss)		108,563		(23,401	)(ii)		135,317		82,977		303,456
2006	First		Second			Third(i)		Fourth		Total
Operating revenues	$	345,984	$	266,262		$	438,065	$	348,581	$	1,398,892
Operating income		130,824		25,856			201,170		131,284		489,134
Provision for income taxes		43,166		969			69,818		44,977		158,930
Net income		66,818		1,600			110,295		68,095		246,808

	Midwest Generation and Subsidiaries ($000)
	2007		2006
Audit Fees	$	683	$	787
Audit Related Fees		—		—
Tax Fee		—		—
All Other Fees		—		—

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.
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.
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.
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.
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 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.
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.

		MIDWEST GENERATION, LLC (REGISTRANT)
		By:		/s/ W. James Scilacci W. James Scilacci Manager and Vice President
		Date:		February 27, 2008

Signature	Title	Date

/s/ Guy F. Gorney Guy F. Gorney	Manager and President (Principal Executive Officer)	February 27, 2008
/s/ W. James Scilacci W. James Scilacci	Manager and Vice President (Principal Financial Officer)	February 27, 2008
/s/ Mark C. Clarke Mark C. Clarke	Vice President and Controller (Controller or Principal Accounting Officer)	February 27, 2008
/s/ Steven D. Eisenberg Steven D. Eisenberg	Manager and Vice President	February 27, 2008

		/s/ Guy F. Gorney Guy F. Gorney Manager and President Midwest Generation, LLC
		/s/ W. James Scilacci W. James Scilacci Manager and Vice President Midwest Generation, LLC

List of Financial Statements

See Index to Consolidated Financial Statements at Item 8 of this report.

List of Financial Statement Schedules

Schedules have been omitted because they are not applicable or because the required information is included in the consolidated financial statements or notes thereto.

List of Exhibits