|  CommissionFile      Number | Exact      name of registrant as specified in its charter;State      of Incorporation;Address and Telephone      Number |  IRS      EmployerIdentification      No. |
|----------------------------------|-------------------------------------------------------------------------------------------------------------------------|------------------------------------------------|
|                             |                                                                                                                    |                                           |
| 1-14756                          | Ameren      Corporation                                                                                                 | 43-1723446                                     |
|                             | (Missouri      Corporation)                                                                                             |                                           |
|                             | 1901      Chouteau Avenue                                                                                               |                                           |
|                             | St.      Louis, Missouri 63103                                                                                          |                                           |
|                             | (314)      621-3222                                                                                                     |                                           |
|                             |                                                                                                                    |                                           |
| 1-2967                           | Union      Electric Company                                                                                             | 43-0559760                                     |
|                             | (Missouri      Corporation)                                                                                             |                                           |
|                             | 1901      Chouteau Avenue                                                                                               |                                           |
|                             | St.      Louis, Missouri 63103                                                                                          |                                           |
|                             | (314)      621-3222                                                                                                     |                                           |
|                             |                                                                                                                    |                                           |
| 1-3672                           | Central      Illinois Public Service Company                                                                            | 37-0211380                                     |
|                             | (Illinois      Corporation)                                                                                             |                                           |
|                             | 607      East Adams Street                                                                                              |                                           |
|                             | Springfield,      Illinois 62739                                                                                        |                                           |
|                             | (888)      789-2477                                                                                                     |                                           |
|                             |                                                                                                                    |                                           |
| 333-56594                        | Ameren      Energy Generating Company                                                                                   | 37-1395586                                     |
|                             | (Illinois      Corporation)                                                                                             |                                           |
|                             | 1901      Chouteau Avenue                                                                                               |                                           |
|                             | St.      Louis, Missouri 63103                                                                                          |                                           |
|                             | (314)      621-3222                                                                                                     |                                           |
|                             |                                                                                                                    |                                           |
| 2-95569                          | CILCORP      Inc.                                                                                                       | 37-1169387                                     |
|                             | (Illinois      Corporation)                                                                                             |                                           |
|                             | 300      Liberty Street                                                                                                 |                                           |
|                             | Peoria,      Illinois 61602                                                                                             |                                           |
|                             | (309)      677-5271                                                                                                     |                                           |
|                             |                                                                                                                    |                                           |
| 1-2732                           | Central      Illinois Light Company                                                                                     | 37-0211050                                     |
|                             | (Illinois      Corporation)                                                                                             |                                           |
|                             | 300      Liberty Street                                                                                                 |                                           |
|                             | Peoria,      Illinois 61602                                                                                             |                                           |
|                             | (309)      677-5271                                                                                                     |                                           |
|                             |                                                                                                                    |                                           |
| 1-3004                           | Illinois      Power Company                                                                                             | 37-0344645                                     |
|                             | (Illinois      Corporation)                                                                                             |                                           |
|                             | 370      South Main Street                                                                                              |                                           |
|                             | Decatur,      Illinois 62523                                                                                            |                                           |
|                             | (217)      424-6600                                                                                                     |                                           |

----

|                                         | Large      Accelerated Filer | AcceleratedFiler     | Non-Accelerated      Filer | Smaller      ReportingCompany |
|----------------------------------------------|------------------------------|----------------------|----------------------------|-------------------------------|
| Ameren      Corporation                      | (X)                          | (        ) | (        )       | (        )          |
| Union      Electric Company                  | (  )               | (        ) | (X)                        | (         )    |
| Central      Illinois Public Service Company | (  )               | (        ) | (X)                        | (  )                |
| Ameren      Energy Generating Company        | (  )               | (        ) | (X)                        | (        )          |
| CILCORP      Inc.                            | (  )               | (        ) | (X)                        | (        )          |
| Central      Illinois Light Company          | (  )               | (        ) | (X)                        | (        )          |
| Illinois      Power Company                  | (  )               | (        ) | (X)                        | (        )          |

| Ameren      Corporation                      | Yes | (        ) | No | (X) |
|----------------------------------------------|-----|----------------------|----|-----|
| Union      Electric Company                  | Yes | (        ) | No | (X) |
| Central      Illinois Public Service Company | Yes | (        ) | No | (X) |
| Ameren      Energy Generating Company        | Yes | (        ) | No | (X) |
| CILCORP      Inc.                            | Yes | (        ) | No | (X) |
| Central      Illinois Light Company          | Yes | (        ) | No | (X) |
| Illinois      Power Company                  | Yes | (  )       | No | (X) |

| Ameren      Corporation                      | Common      stock, $.01 par value per share – 209,474,844                                                                                                                 |
|----------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                         |                                                                                                                                                                            |
| Union      Electric Company                  | Common      stock, $5 par value per share, held by AmerenCorporation      (parent company of the registrant) – 102,123,834                                                |
|                                         |                                                                                                                                                                            |
| Central      Illinois Public Service Company | Common      stock, no par value, held by AmerenCorporation      (parent company of the registrant) – 25,452,373                                                           |
|                                         |                                                                                                                                                                            |
| Ameren      Energy Generating Company        | Common      stock, no par value, held by Ameren EnergyResources      Company, LLC (parent company of theregistrant      and subsidiary of AmerenCorporation)      – 2,000 |
|                                         |                                                                                                                                                                            |
| CILCORP      Inc.                            | Common      stock, no par value, held by AmerenCorporation      (parent company of the registrant) – 1,000                                                                |
|                                         |                                                                                                                                                                            |
| Central      Illinois Light Company          | Common      stock, no par value, held by CILCORP Inc.(parent      company of the registrant and subsidiary ofAmeren      Corporation) – 13,563,871                        |
|                                         |                                                                                                                                                                            |
| Illinois      Power Company                  | Common      stock, no par value, held by AmerenCorporation      (parent company of the registrant) – 23,000,000                                                      |

----

|   | OMISSION      OF CERTAIN INFORMATION |
|--------|--------------------------------------|

----

----

|                                                                                                                                                                                                                                                                                                       | Page   |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| GLOSSARY      OF TERMS AND      ABBREVIATIONS.....................................................................................................................................................................................................                                                         | 5      |
|                                                                                                                                                                                                                                                                                                       |   |
| Forward-looking      Statements..........................................................................................................................................................................................................................................                                  | 7      |
|                                                                                                                                                                                                                                                                                                       |   |
| PART      I   Financial Information                                                                                                                                                                                                                                                         |   |
|                                                                                                                                                                                                                                                                                                       |   |
| Item      1.     Financial Statements      (Unaudited)                                                                                                                                                                                                                            |   |
| Ameren      Corporation                                                                                                                                                                                                                                                                                    |   |
| Consolidated      Statement of      Income...............................................................................................................................................................................................................                                                  | 9      |
| Consolidated      Balance      Sheet..........................................................................................................................................................................................................................                                             | 10     |
| Consolidated      Statement of Cash      Flows.......................................................................................................................................................................................................                                                      | 11     |
| Union      Electric Company                                                                                                                                                                                                                                                                                |   |
| Consolidated      Statement of      Income...............................................................................................................................................................................................................                                                  | 12     |
| Consolidated      Balance      Sheet..........................................................................................................................................................................................................................                                             | 13     |
| Consolidated      Statement of Cash      Flows.......................................................................................................................................................................................................                                                      | 14     |
| Central      Illinois Public Service Company                                                                                                                                                                                                                                                               |   |
| Statement      of      Income.......................................................................................................................................................................................................................................                                       | 15     |
| Balance      Sheet..................................................................................................................................................................................................................................................                                       | 16     |
| Statement      of Cash      Flows................................................................................................................................................................................................................................                                          | 17     |
| Ameren      Energy Generating Company                                                                                                                                                                                                                                                                      |   |
| Consolidated      Statement of      Income...............................................................................................................................................................................................................                                                  | 18     |
| Consolidated      Balance      Sheet..........................................................................................................................................................................................................................                                             | 19     |
| Consolidated      Statement of Cash      Flows.......................................................................................................................................................................................................                                                      | 20     |
| CILCORP      Inc.                                                                                                                                                                                                                                                                                          |   |
| Consolidated      Statement of      Income...............................................................................................................................................................................................................                                                  | 21     |
| Consolidated      Balance      Sheet..........................................................................................................................................................................................................................                                             | 22     |
| Consolidated      Statement of Cash      Flows.......................................................................................................................................................................................................                                                      | 23     |
| Central      Illinois Light Company                                                                                                                                                                                                                                                                        |   |
| Consolidated      Statement of      Income..............................................................................................................................................................................................................                                                   | 24     |
| Consolidated      Balance      Sheet.........................................................................................................................................................................................................................                                              | 25     |
| Consolidated      Statement of Cash      Flows.......................................................................................................................................................................................................                                                      | 26     |
| Illinois      Power Company                                                                                                                                                                                                                                                                                |   |
| Consolidated      Statement of      Income..............................................................................................................................................................................................................                                                   | 27     |
| Consolidated      Balance      Sheet..........................................................................................................................................................................................................................                                             | 28     |
| Consolidated      Statement of Cash      Flows.......................................................................................................................................................................................................                                                      | 29     |
|                                                                                                                                                                                                                                                                                                       |   |
| Combined      Notes to Financial      Statements....................................................................................................................................................................................................                                                       | 30     |
|                                                                                                                                                                                                                                                                                                       |   |
| Item      2.    Management’s Discussion and Analysis of Financial      Condition and Results of      Operations............................................................................................................                                                           | 58     |
| Item      3.    Quantitative and Qualitative Disclosures About Market      Risk.................................................................................................................................................................                                            | 78     |
| Item      4 and                                                                                                                                                                                                                                                                                            |   |
| Item      4T.  Controls and      Procedures...............................................................................................................................................................................................................................                            | 82     |
|                                                                                                                                                                                                                                                                                                       |   |
| PART      II Other Information                                                                                                                                                                                                                                                                        |   |
|                                                                                                                                                                                                                                                                                                       |   |
| Item      1.    Legal      Proceedings...........................................................................................................................................................................................................................................           | 83     |
| Item      1A. Risk      Factors......................................................................................................................................................................................................................................................                      | 83     |
| Item      2.    Unregistered Sales of Equity Securities and Use of      Proceeds.................................................................................................................................................................                                           | 83     |
| Item      6.         Exhibits.............................................................................................................................................................................................................................................................. | 84     |
|                                                                                                                                                                                                                                                                                                       |   |
| Signatures.........................................................................................................................................................................................................................................................................                        | 87     |

----

----

----

----

|  | ·   | regulatory      or legislative actions, including changes in regulatory policies and      ratemaking determinations, such as the outcome of pending UE, CIPS, CILCO      and IP rate proceedings or future legislative actions that seek to limit      or reverse rate increases; |
|--|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | uncertainty      as to the effect of implementation of the Illinois electric settlement      agreement on Ameren, the Ameren Illinois Utilities, Genco and AERG,      including implementation of a new power procurement process in Illinois      that began in 2008; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | changes      in laws and other governmental actions, including monetary and fiscal      policies; |
|--------------------|---------------------------------------------------------------------------------------------------|

| ·   | changes      in laws or regulations that adversely affect the ability of electric      distribution companies and other purchasers of wholesale electricity to      pay their suppliers, including UE and Marketing  Company; |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | enactment      of legislation taxing electric generators, in Illinois or      elsewhere; |
|--------------------|------------------------------------------------------------------------------------------|

| ·   | the      effects of increased competition in the future due to, among other things,      deregulation of certain aspects of our business at both the state and      federal levels, and the implementation of deregulation, such as occurred      when the electric rate freeze and power supply contracts expired in      Illinois at the end of 2006; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      effects of participation in theMISO; |
|--------------------|-----------------------------------------------|

| ·   | the      availability of fuel such as coal, natural gas, and enriched uranium used      to produce electricity; the availability of purchased power and natural      gas for distribution; and the level and volatility of future market prices      for such commodities, including the ability to recover the costs for such      commodities; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      effectiveness of our risk management strategies and the use of financial      and derivative instruments; |
|--------------------|--------------------------------------------------------------------------------------------------------------------|

| ·   | prices      for power in the Midwest, including forward  prices; |
|--------------------|------------------------------------------------------------------|

| ·   | business      and economic conditions, including their impact on interest      rates; |
|--------------------|---------------------------------------------------------------------------------------|

| ·   | disruptions      of the capital markets or other events that make the Ameren Companies’      access to necessary capital more difficult or  costly; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      impact of the adoption of new accounting standards and the application of      appropriate technical accounting rules and  guidance; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | actions      of credit rating agencies and the effects of such  actions; |
|--------------------|--------------------------------------------------------------------------|

| ·   | weather      conditions and other naturalphenomena; |
|--------------------|-----------------------------------------------------|

| ·   | the      impact of system outages caused by severe weather conditions or other      events; |
|--------------------|---------------------------------------------------------------------------------------------|

| ·   | generation      plant construction, installation and performance, including costs      associated with UE’s Taum Sauk pumped-storage hydroelectric plant incident      and the plant’s future operation; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | recoverability      through insurance of costs associated with UE’s Taum Sauk pumped-storage      hydroelectric plant incident; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------|

| ·   | operation      of UE’s nuclear power facility, including planned and unplanned outages,      and decommissioning costs; |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      effects of strategic initiatives, including acquisitions and      divestitures; |
|--------------------|------------------------------------------------------------------------------------------|

| ·   | the      impact of current environmental regulations on utilities and power      generating companies and the expectation that more stringent requirements,      including those related to greenhouse gases, will be introduced over time,      which could have a negative financialeffect; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | labor      disputes, future wage and employee benefits costs, including changes in      discount rates and returns on benefit plan  assets; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      inability of our counterparties and affiliates to meet their obligations      with respect to contracts and financial  instruments; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      cost and availability of transmission capacity for the energy generated by      the Ameren Companies’ facilities or required to satisfy energy sales made      by the Ameren Companies; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | legal      and administrative proceedings; and |
|--------------------|------------------------------------------------|

| ·   | acts      of sabotage, war, terrorism or intentionally disruptive    acts. |
|--------------------|----------------------------------------------------------------------------|

----

----

| AMEREN      CORPORATION                                                           |                                  |
|-----------------------------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF INCOME                                             |                                  |
| (Unaudited)      (In millions, except per share amounts)                          |                                  |
|                                                                              |                                  |   |   |   |   |
|                                                                              | Three      Months EndedMarch      31, |   |
|                                                                              | 2008                                  |   |   | 2007 |   |
| Operating      Revenues:                                                          |                                  |   |   |   |   |
| Electric                                                                          | $                                     | 1,467 |   |   | $ | 1,463 |   |
| Gas                                                                               |                                  | 612 |   |   |   | 561 |   |
| Total      operating revenues                                                     |                                  | 2,079 |   |   |   | 2,024 |   |
| Operating      Expenses:                                                          |                                  |   |   |   |   |   |   |
| Fuel                                                                              |                                  | 302 |   |   |   | 263 |   |
| Purchased      power                                                              |                                  | 287 |   |   |   | 373 |   |
| Gas      purchased for resale                                                     |                                  | 459 |   |   |   | 421 |   |
| Other      operations and maintenance                                             |                                  | 423 |   |   |   | 389 |   |
| Depreciation      and amortization                                                |                                  | 176 |   |   |   | 183 |   |
| Taxes      other than income taxes                                                |                                  | 113 |   |   |   | 102 |   |
| Total      operating expenses                                                     |                                  | 1,760 |   |   |   | 1,731 |   |
| Operating      Income                                                             |                                  | 319 |   |   |   | 293 |   |
| Other      Income and Expenses:                                                   |                                  |   |   |   |   |   |   |
| Miscellaneous      income                                                         |                                  | 21 |   |   |   | 16 |   |
| Miscellaneous      expense                                                        |                                  | (4 | ) |   |   | (5 | ) |
| Total      other income                                                           |                                  | 17 |   |   |   | 11 |   |
| Interest      Charges                                                             |                                  | 100 |   |   |   | 100 |   |
| Income      Before Income Taxes, Minority Interest, and                           |                                  |   |   |   |   |   |   |
| Preferred      Dividends of Subsidiaries                                          |                                  | 236 |   |   |   | 204 |   |
| Income      Taxes                                                                 |                                  | 87 |   |   |   | 71 |   |
| Income      Before Minority Interest and Preferred Dividends of      Subsidiaries |                                  | 149 |   |   |   | 133 |   |
| Minority      Interest and Preferred Dividends of Subsidiaries                    |                                  | 11 |   |   |   | 10 |   |
| Net      Income                                                                   | $                                     | 138 |   |   | $ | 123 |   |
| Earnings      per Common Share – Basic and Diluted                          | $                                     | 0.66 |   |   | $ | 0.59 |   |
| Dividends      per Common Share                                                   | $                                     | 0.635 |   |   | $ | 0.635 |   |
| Average      Common Shares Outstanding                                            |                                  | 208.7 |   |   |   | 206.6 |   |
|                                                                              |                                  |   |   |   |   |   |   |

----

| AMEREN      CORPORATION                                                  |           |
|--------------------------------------------------------------------------|----------------|
| CONSOLIDATED      BALANCE SHEET                                          |           |
| (Unaudited)      (In millions, except per share amounts)                 |           |
|                                                                     |           |   |   |   |   |
|                                                                     | March      31, |   |   | December      31, |   |
|                                                                     | 2008           |   |   | 2007 |   |
| ASSETS                                                                   |           |   |   |   |   |
| Current      Assets:                                                     |           |   |   |   |   |
| Cash      and cash equivalents                                           | $              | 186 |   |   | $ | 355 |   |
| Accounts      receivable – trade (less allowance for doubtful      |           |   |   |   |   |   |   |
| accounts      of $38 and $22, respectively)                              |           | 656 |   |   |   | 570 |   |
| Unbilled      revenue                                                    |           | 318 |   |   |   | 359 |   |
| Miscellaneous      accounts and notes receivable                         |           | 315 |   |   |   | 280 |   |
| Materials      and supplies                                              |           | 556 |   |   |   | 735 |   |
| Other      current assets                                                |           | 272 |   |   |   | 181 |   |
| Total      current assets                                                |           | 2,303 |   |   |   | 2,480 |   |
| Property      and Plant, Net                                             |           | 15,294 |   |   |   | 15,069 |   |
| Investments      and Other Assets:                                       |           |   |   |   |   |   |   |
| Nuclear      decommissioning trust fund                                  |           | 291 |   |   |   | 307 |   |
| Goodwill                                                                 |           | 831 |   |   |   | 831 |   |
| Intangible      assets                                                   |           | 189 |   |   |   | 198 |   |
| Regulatory      assets                                                   |           | 1,149 |   |   |   | 1,158 |   |
| Other      assets                                                        |           | 701 |   |   |   | 685 |   |
| Total      investments and other assets                                  |           | 3,161 |   |   |   | 3,179 |   |
| TOTAL      ASSETS                                                        | $              | 20,758 |   |   | $ | 20,728 |   |
|                                                                     |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDERS' EQUITY                                |           |   |   |   |   |   |   |
| Current      Liabilities:                                                |           |   |   |   |   |   |   |
| Current      maturities of long-term debt                                | $              | 823 |   |   | $ | 221 |   |
| Short-term      debt                                                     |           | 1,617 |   |   |   | 1,472 |   |
| Accounts      and wages payable                                          |           | 443 |   |   |   | 687 |   |
| Taxes      accrued                                                       |           | 88 |   |   |   | 84 |   |
| Other      current liabilities                                           |           | 539 |   |   |   | 438 |   |
| Total      current liabilities                                           |           | 3,510 |   |   |   | 2,902 |   |
| Long-term      Debt, Net                                                 |           | 5,066 |   |   |   | 5,691 |   |
| Preferred      Stock of Subsidiary Subject to Mandatory Redemption       |           | 16 |   |   |   | 16 |   |
| Deferred      Credits and Other Liabilities:                             |           |   |   |   |   |   |   |
| Accumulated      deferred income taxes, net                              |           | 1,989 |   |   |   | 2,046 |   |
| Accumulated      deferred investment tax credits                         |           | 106 |   |   |   | 109 |   |
| Regulatory      liabilities                                              |           | 1,328 |   |   |   | 1,240 |   |
| Asset      retirement obligations                                        |           | 569 |   |   |   | 562 |   |
| Accrued      pension and other postretirement benefits                   |           | 856 |   |   |   | 839 |   |
| Other      deferred credits and liabilities                              |           | 346 |   |   |   | 354 |   |
| Total      deferred credits and other liabilities                        |           | 5,194 |   |   |   | 5,150 |   |
| Preferred      Stock of Subsidiaries Not Subject to Mandatory Redemption |           | 195 |   |   |   | 195 |   |
| Minority      Interest in Consolidated Subsidiaries                      |           | 23 |   |   |   | 22 |   |
| Commitments      and Contingencies (Notes 2, 8, 9, and 10)               |           |   |   |   |   |   |   |
| Stockholders'      Equity:                                               |           |   |   |   |   |   |   |
| Common      stock, $.01 par value, 400.0 shares authorized –       |           |   |   |   |   |   |   |
| shares      outstanding of 209.4 and 208.3, respectively                 |           | 2 |   |   |   | 2 |   |
| Other      paid-in capital, principally premium on common stock          |           | 4,656 |   |   |   | 4,604 |   |
| Retained      earnings                                                   |           | 2,115 |   |   |   | 2,110 |   |
| Accumulated      other comprehensive income (loss)                       |           | (19 | ) |   |   | 36 |   |
| Total      stockholders’ equity                                    |           | 6,754 |   |   |   | 6,752 |   |
| TOTAL      LIABILITIES AND STOCKHOLDERS' EQUITY                          | $              | 20,758 |   |   | $ | 20,728 |   |

----

| AMEREN      CORPORATION                                                 |                                  |
|-------------------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF CASH FLOWS                               |                                  |
| (Unaudited)      (In millions)                                          |                                  |
|                                                                    |                                  |   |   |   |   |
|                                                                    |                                  |   |   |   |   |
|                                                                    | Three      Months EndedMarch      31, |   |
|                                                                    | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:                              |                                  |   |   |   |   |
| Net      income                                                         | $                                     | 138 |   |   | $ | 123 |   |
| Adjustments      to reconcile net income to net cash                    |                                  |   |   |   |   |   |   |
| provided      by operating activities:                                  |                                  |   |   |   |   |   |   |
| Gain      on sales of emission allowances                               |                                  | (2 | ) |   |   | (4 | ) |
| Mark-to-market      (gain) loss on derivatives                          |                                  | (16 | ) |   |   | 4 |   |
| Depreciation      and amortization                                      |                                  | 180 |   |   |   | 182 |   |
| Amortization      of nuclear fuel                                       |                                  | 11 |   |   |   | 9 |   |
| Amortization      of debt issuance costs and premium/discounts          |                                  | 5 |   |   |   | 5 |   |
| Deferred      income taxes and investment tax credits, net              |                                  | 23 |   |   |   | (12 | ) |
| Minority      interest                                                  |                                  | 8 |   |   |   | 7 |   |
| Other                                                                   |                                  | (1 | ) |   |   | 6 |   |
| Changes      in assets and liabilities:                                 |                                  |   |   |   |   |   |   |
| Receivables                                                             |                                  | (78 | ) |   |   | (193 | ) |
| Materials      and supplies                                             |                                  | 179 |   |   |   | 158 |   |
| Accounts      and wages payable                                         |                                  | (106 | ) |   |   | (81 | ) |
| Taxes      accrued                                                      |                                  | 4 |   |   |   | 77 |   |
| Assets,      other                                                      |                                  | (25 | ) |   |   | 19 |   |
| Liabilities,      other                                                 |                                  | (16 | ) |   |   | 37 |   |
| Pension      and other postretirement benefit obligations               |                                  | 22 |   |   |   | 21 |   |
| Net      cash provided by operating activities                          |                                  | 326 |   |   |   | 358 |   |
| Cash      Flows From Investing Activities:                              |                                  |   |   |   |   |   |   |
| Capital      expenditures                                               |                                  | (420 | ) |   |   | (357 | ) |
| Nuclear      fuel expenditures                                          |                                  | (102 | ) |   |   | (23 | ) |
| Purchases      of securities – nuclear decommissioning trust fund |                                  | (89 | ) |   |   | (47 | ) |
| Sales      of securities – nuclear decommissioning trust fund     |                                  | 86 |   |   |   | 43 |   |
| Purchases      of emission allowances                                   |                                  | (2 | ) |   |   | (5 | ) |
| Sales      of emission allowances                                       |                                  | - |   |   |   | 2 |   |
| Other                                                                   |                                  | - |   |   |   | 1 |   |
| Net      cash used in investing activities                              |                                  | (527 | ) |   |   | (386 | ) |
| Cash      Flows From Financing Activities:                              |                                  |   |   |   |   |   |   |
| Dividends      on common stock                                          |                                  | (133 | ) |   |   | (131 | ) |
| Short-term      debt, net                                               |                                  | 145 |   |   |   | 341 |   |
| Dividends      paid to minority interest holder                         |                                  | (7 | ) |   |   | (5 | ) |
| Redemptions,      repurchases, and maturities:                          |                                  |   |   |   |   |   |   |
| Long-term      debt                                                     |                                  | (19 | ) |   |   | (174 | ) |
| Issuances:                                                              |                                  |   |   |   |   |   |   |
| Common      stock                                                       |                                  | 46 |   |   |   | 21 |   |
| Net      cash provided by financing activities                          |                                  | 32 |   |   |   | 52 |   |
| Net      change in cash and cash equivalents                            |                                  | (169 | ) |   |   | 24 |   |
| Cash      and cash equivalents at beginning of year                     |                                  | 355 |   |   |   | 137 |   |
| Cash      and cash equivalents at end of period                         | $                                     | 186 |   |   | $ | 161 |   |

----

| UNION      ELECTRIC COMPANY                                   |                                  |
|---------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF INCOME                         |                                  |
| (Unaudited)      (In millions)                                |                                  |
|                                                          |                                  |   |   |   |   |
|                                                          |                                  |   |   |   |   |
|                                                          | Three      Months EndedMarch      31, |   |
|                                                          | 2008                                  |   |   | 2007 |   |
| Operating      Revenues:                                      |                                  |   |   |   |   |
| Electric      – excluding off-system                    | $                                     | 490 |   |   | $ | 451 |   |
| Electric      – off-system                              |                                  | 151 |   |   |   | 122 |   |
| Gas                                                           |                                  | 83 |   |   |   | 76 |   |
| Other                                                         |                                  | - |   |   |   | 1 |   |
| Total      operating revenues                                 |                                  | 724 |   |   |   | 650 |   |
| Operating      Expenses:                                      |                                  |   |   |   |   |   |   |
| Fuel                                                          |                                  | 147 |   |   |   | 125 |   |
| Purchased      power                                          |                                  | 53 |   |   |   | 40 |   |
| Gas      purchased for resale                                 |                                  | 55 |   |   |   | 49 |   |
| Other      operations and maintenance                         |                                  | 217 |   |   |   | 224 |   |
| Depreciation      and amortization                            |                                  | 81 |   |   |   | 87 |   |
|     Taxes      other than income taxes    |                                  | 60 |   |   |   | 57 |   |
| Total      operating expenses                                 |                                  | 613 |   |   |   | 582 |   |
| Operating      Income                                         |                                  | 111 |   |   |   | 68 |   |
| Other      Income and Expenses:                               |                                  |   |   |   |   |   |   |
| Miscellaneous      income                                     |                                  | 14 |   |   |   | 10 |   |
| Miscellaneous      expense                                    |                                  | (2 | ) |   |   | (2 | ) |
| Total      other income                                       |                                  | 12 |   |   |   | 8 |   |
| Interest      Charges                                         |                                  | 41 |   |   |   | 48 |   |
| Income      Before Income Taxes and Equity                    |                                  |   |   |   |   |   |   |
|    in      Income of Unconsolidated Investment |                                  | 82 |   |   |   | 28 |   |
| Income      Taxes                                             |                                  | 29 |   |   |   | 9 |   |
| Income      Before Equity in Income                           |                                  |   |   |   |   |   |   |
|    of      Unconsolidated Investment           |                                  | 53 |   |   |   | 19 |   |
| Equity      in Income of Unconsolidated Investment,           |                                  |   |   |   |   |   |   |
| Net      of Taxes                                             |                                  | 11 |   |   |   | 14 |   |
| Net      Income                                               |                                  | 64 |   |   |   | 33 |   |
| Preferred      Stock Dividends                                |                                  | 1 |   |   |   | 1 |   |
| Net      Income Available to Common Stockholder               | $                                     | 63 |   |   | $ | 32 |   |

----

| UNION      ELECTRIC COMPANY                                                                    |           |
|------------------------------------------------------------------------------------------------|----------------|
| CONSOLIDATED      BALANCE SHEET                                                                |           |
| (Unaudited)      (In millions, except per share amounts)                                       |           |
|                                                                                           |           |   |   |   |   |
|                                                                                           | March      31, |   |   | December      31, |   |
|                                                                                           | 2008           |   |   | 2007 |   |
| ASSETS                                                                                         |           |   |   |   |   |
| Current      Assets:                                                                           |           |   |   |   |   |
| Cash      and cash equivalents                                                                 | $              | - |   |   | $ | 185 |   |
| Accounts      receivable – trade (less allowance for doubtful                            |           |   |   |   |   |   |   |
| accounts      of $8 and $6, respectively)                                                      |           | 205 |   |   |   | 191 |   |
| Unbilled      revenue                                                                          |           | 102 |   |   |   | 118 |   |
| Miscellaneous      accounts and notes receivable                                               |           | 246 |   |   |   | 213 |   |
| Advances      to money pool                                                                    |           | 36 |   |   |   | 15 |   |
| Accounts      receivable – affiliates                                                    |           | 17 |   |   |   | 90 |   |
| Materials      and supplies                                                                    |           | 302 |   |   |   | 301 |   |
| Other      current assets                                                                      |           | 85 |   |   |   | 50 |   |
| Total      current assets                                                                      |           | 993 |   |   |   | 1,163 |   |
| Property      and Plant, Net                                                                   |           | 8,339 |   |   |   | 8,189 |   |
| Investments      and Other Assets:                                                             |           |   |   |   |   |   |   |
| Nuclear      decommissioning trust fund                                                        |           | 291 |   |   |   | 307 |   |
| Intangible      assets                                                                         |           | 54 |   |   |   | 56 |   |
| Regulatory      assets                                                                         |           | 711 |   |   |   | 697 |   |
| Other      assets                                                                              |           | 374 |   |   |   | 491 |   |
| Total      investments and other assets                                                        |           | 1,430 |   |   |   | 1,551 |   |
| TOTAL      ASSETS                                                                              | $              | 10,762 |   |   | $ | 10,903 |   |
|                                                                                           |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDERS' EQUITY                                                      |           |   |   |   |   |   |   |
| Current      Liabilities:                                                                      |           |   |   |   |   |   |   |
| Current      maturities of long-term debt                                                      | $              | 381 |   |   | $ | 152 |   |
| Short-term      debt                                                                           |           | 208 |   |   |   | 82 |   |
| Intercompany      note payable – Ameren                                                  |           | 122 |   |   |   | - |   |
| Accounts      and wages payable                                                                |           | 135 |   |   |   | 315 |   |
| Accounts      payable – affiliates                                                       |           | 75 |   |   |   | 212 |   |
| Taxes      accrued                                                                             |           | 49 |   |   |   | 78 |   |
| Other      current liabilities                                                                 |           | 204 |   |   |   | 209 |   |
| Total      current liabilities                                                                 |           | 1,174 |   |   |   | 1,048 |   |
| Long-term      Debt, Net                                                                       |           | 2,979 |   |   |   | 3,208 |   |
| Deferred      Credits and Other Liabilities:                                                   |           |   |   |   |   |   |   |
| Accumulated      deferred income taxes, net                                                    |           | 1,281 |   |   |   | 1,273 |   |
| Accumulated      deferred investment tax credits                                               |           | 84 |   |   |   | 85 |   |
| Regulatory      liabilities                                                                    |           | 883 |   |   |   | 865 |   |
| Asset      retirement obligations                                                              |           | 482 |   |   |   | 476 |   |
| Accrued      pension and other postretirement benefits                                         |           | 303 |   |   |   | 297 |   |
| Other      deferred credits and liabilities                                                    |           | 41 |   |   |   | 50 |   |
| Total      deferred credits and other liabilities                                              |           | 3,074 |   |   |   | 3,046 |   |
| Commitments      and Contingencies (Notes 2, 8, 9 and 10)                                      |           |   |   |   |   |   |   |
| Stockholders'      Equity:                                                                     |           |   |   |   |   |   |   |
| Common      stock, $5 par value, 150.0 shares authorized – 102.1 shares      outstanding |           | 511 |   |   |   | 511 |   |
| Preferred      stock not subject to mandatory redemption                                       |           | 113 |   |   |   | 113 |   |
| Other      paid-in capital, principally premium on common stock                                |           | 1,119 |   |   |   | 1,119 |   |
| Retained      earnings                                                                         |           | 1,799 |   |   |   | 1,855 |   |
| Accumulated      other comprehensive income (loss)                                             |           | (7 | ) |   |   | 3 |   |
| Total      stockholders' equity                                                                |           | 3,535 |   |   |   | 3,601 |   |
| TOTAL      LIABILITIES AND STOCKHOLDERS' EQUITY                                                | $              | 10,762 |   |   | $ | 10,903 |   |
|                                                                                           |           |   |   |   |   |   |   |

----

| UNION      ELECTRIC COMPANY                                             |                                  |
|-------------------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF CASH FLOWS                               |                                  |
| (Unaudited)      (In millions)                                          |                                  |
|                                                                    |                                  |   |   |   |   |
|                                                                    | Three      Months EndedMarch      31, |   |
|                                                                    | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:                              |                                  |   |   |   |   |
| Net      income                                                         | $                                     | 64 |   |   | $ | 33 |   |
| Adjustments      to reconcile net income to net cash                    |                                  |   |   |   |   |   |   |
| provided      by operating activities:                                  |                                  |   |   |   |   |   |   |
| Gain      on sales of emission allowances                               |                                  | (1 | ) |   |   | (3 | ) |
| Mark-to-market      (gain) on derivatives                               |                                  | (12 | ) |   |   | (2 | ) |
| Depreciation      and amortization                                      |                                  | 81 |   |   |   | 87 |   |
| Amortization      of nuclear fuel                                       |                                  | 11 |   |   |   | 9 |   |
| Amortization      of debt issuance costs and premium/discounts          |                                  | 1 |   |   |   | 1 |   |
| Deferred      income taxes and investment tax credits, net              |                                  | 15 |   |   |   | 9 |   |
| Other                                                                   |                                  | (4 | ) |   |   | 2 |   |
| Changes      in assets and liabilities:                                 |                                  |   |   |   |   |   |   |
| Receivables                                                             |                                  | 52 |   |   |   | (50 | ) |
| Materials      and supplies                                             |                                  | (1 | ) |   |   | 2 |   |
| Accounts      and wages payable                                         |                                  | (252 | ) |   |   | (188 | ) |
| Taxes      accrued                                                      |                                  | (29 | ) |   |   | 29 |   |
| Assets,      other                                                      |                                  | 83 |   |   |   | 55 |   |
| Liabilities,      other                                                 |                                  | (50 | ) |   |   | (41 | ) |
| Pension      and other postretirement benefit obligations               |                                  | 11 |   |   |   | 7 |   |
| Net      cash used in operating activities                              |                                  | (31 | ) |   |   | (50 | ) |
| Cash      Flows From Investing Activities:                              |                                  |   |   |   |   |   |   |
| Capital      expenditures                                               |                                  | (197 | ) |   |   | (200 | ) |
| Nuclear      fuel expenditures                                          |                                  | (102 | ) |   |   | (23 | ) |
| Changes      in money pool advances                                     |                                  | (21 | ) |   |   | 4 |   |
| Purchases      of securities – nuclear decommissioning trust fund |                                  | (89 | ) |   |   | (47 | ) |
| Sales      of securities – nuclear decommissioning trust fund     |                                  | 85 |   |   |   | 43 |   |
| Sales      of emission allowances                                       |                                  | - |   |   |   | 2 |   |
| Net      cash used in investing activities                              |                                  | (324 | ) |   |   | (221 | ) |
| Cash      Flows From Financing Activities:                              |                                  |   |   |   |   |   |   |
| Dividends      on common stock                                          |                                  | (77 | ) |   |   | (80 | ) |
| Dividends      on preferred stock                                       |                                  | (1 | ) |   |   | (1 | ) |
| Short-term      debt, net                                               |                                  | 126 |   |   |   | 214 |   |
| Intercompany      note payable – Ameren, net                      |                                  | 122 |   |   |   | 137 |   |
| Net      cash provided by financing activities                          |                                  | 170 |   |   |   | 270 |   |
| Net      change in cash and cash equivalents                            |                                  | (185 | ) |   |   | (1 | ) |
| Cash      and cash equivalents at beginning of year                     |                                  | 185 |   |   |   | 1 |   |
| Cash      and cash equivalents at end of period                         | $                                     | - |   |   | $ | - |   |
|                                                                    |                                  |   |   |   |   |   |   |

----

| CENTRAL      ILLINOIS PUBLIC SERVICE COMPANY    |                                  |
|-------------------------------------------------|---------------------------------------|
| STATEMENT      OF INCOME                        |                                  |
| (Unaudited)      (In millions)                  |                                  |
|                                            |                                  |   |   |   |   |
|                                            |                                  |   |   |   |   |
|                                            | Three      Months EndedMarch      31, |   |
|                                            | 2008                                  |   |   | 2007 |   |
| Operating      Revenues:                        |                                  |   |   |   |   |
| Electric                                        | $                                     | 180 |   |   | $ | 211 |   |
| Gas                                             |                                  | 110 |   |   |   | 101 |   |
| Other                                           |                                  | - |   |   |   | 2 |   |
| Total      operating revenues                   |                                  | 290 |   |   |   | 314 |   |
| Operating      Expenses:                        |                                  |   |   |   |   |   |   |
| Purchased      power                            |                                  | 123 |   |   |   | 148 |   |
| Gas      purchased for resale                   |                                  | 80 |   |   |   | 74 |   |
| Other      operations and maintenance           |                                  | 50 |   |   |   | 43 |   |
| Depreciation      and amortization              |                                  | 17 |   |   |   | 17 |   |
| Taxes      other than income taxes              |                                  | 12 |   |   |   | 9 |   |
| Total      operating expenses                   |                                  | 282 |   |   |   | 291 |   |
| Operating      Income                           |                                  | 8 |   |   |   | 23 |   |
| Miscellaneous      Income                       |                                  | 3 |   |   |   | 3 |   |
| Interest      Charges                           |                                  | 7 |   |   |   | 8 |   |
| Income      Before Income Taxes                 |                                  | 4 |   |   |   | 18 |   |
| Income      Taxes                               |                                  | 1 |   |   |   | 6 |   |
| Net      Income                                 |                                  | 3 |   |   |   | 12 |   |
| Preferred      Stock Dividends                  |                                  | 1 |   |   |   | 1 |   |
| Net      Income Available to Common Stockholder | $                                     | 2 |   |   | $ | 11 |   |
|                                            |                                  |   |   |   |   |   |   |

----

| CENTRAL      ILLINOIS PUBLIC SERVICE COMPANY                                                 |           |
|----------------------------------------------------------------------------------------------|----------------|
| BALANCE      SHEET                                                                           |           |
| (Unaudited)      (In millions)                                                               |           |
|                                                                                         |           |   |   |   |   |
|                                                                                         | March      31, |   |   | December      31, |   |
|                                                                                         | 2008           |   |   | 2007 |   |
| ASSETS                                                                                       |           |   |   |   |   |
| Current      Assets:                                                                         |           |   |   |   |   |
| Cash      and cash equivalents                                                               | $              | 18 |   |   | $ | 26 |   |
| Accounts      receivable – trade (less allowance for doubtful                          |           |   |   |   |   |   |   |
| accounts      of $9 and $5, respectively)                                                    |           | 101 |   |   |   | 62 |   |
| Unbilled      revenue                                                                        |           | 48 |   |   |   | 66 |   |
| Accounts      receivable – affiliates                                                  |           | 24 |   |   |   | 9 |   |
| Current      portion of intercompany note receivable – Genco                           |           | 39 |   |   |   | 39 |   |
| Current      portion of intercompany tax receivable – Genco                            |           | 9 |   |   |   | 9 |   |
| Materials      and supplies                                                                  |           | 20 |   |   |   | 66 |   |
| Other      current assets                                                                    |           | 55 |   |   |   | 35 |   |
| Total      current assets                                                                    |           | 314 |   |   |   | 312 |   |
| Property      and Plant, Net                                                                 |           | 1,179 |   |   |   | 1,174 |   |
| Investments      and Other Assets:                                                           |           |   |   |   |   |   |   |
| Intercompany      note receivable – Genco                                              |           | 87 |   |   |   | 87 |   |
| Intercompany      tax receivable – Genco                                               |           | 103 |   |   |   | 105 |   |
| Regulatory      assets                                                                       |           | 109 |   |   |   | 113 |   |
| Other      assets                                                                            |           | 54 |   |   |   | 69 |   |
| Total      investments and other assets                                                      |           | 353 |   |   |   | 374 |   |
| TOTAL      ASSETS                                                                            | $              | 1,846 |   |   | $ | 1,860 |   |
|                                                                                         |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDERS' EQUITY                                                    |           |   |   |   |   |   |   |
| Current      Liabilities:                                                                    |           |   |   |   |   |   |   |
| Current      maturities of long-term debt                                                    | $              | 50 |   |   | $ | 15 |   |
| Short-term      debt                                                                         |           | 85 |   |   |   | 125 |   |
| Accounts      and wages payable                                                              |           | 36 |   |   |   | 44 |   |
| Accounts      payable – affiliates                                                     |           | 15 |   |   |   | 19 |   |
| Taxes      accrued                                                                           |           | 14 |   |   |   | 8 |   |
| Other      current liabilities                                                               |           | 63 |   |   |   | 47 |   |
| Total      current liabilities                                                               |           | 263 |   |   |   | 258 |   |
| Long-term      Debt, Net                                                                     |           | 421 |   |   |   | 456 |   |
| Deferred      Credits and Other Liabilities:                                                 |           |   |   |   |   |   |   |
| Accumulated      deferred income taxes and investment tax credits, net                       |           | 266 |   |   |   | 269 |   |
| Regulatory      liabilities                                                                  |           | 280 |   |   |   | 265 |   |
| Accrued      pension and other postretirement benefits                                       |           | 67 |   |   |   | 67 |   |
| Other      deferred credits and liabilities                                                  |           | 30 |   |   |   | 28 |   |
| Total      deferred credits and other liabilities                                            |           | 643 |   |   |   | 629 |   |
| Commitments      and Contingencies (Notes 2, 8 and 9)                                        |           |   |   |   |   |   |   |
| Stockholders'      Equity:                                                                   |           |   |   |   |   |   |   |
| Common      stock, no par value, 45.0 shares authorized – 25.5 shares      outstanding |           | - |   |   |   | - |   |
| Other      paid-in capital                                                                   |           | 191 |   |   |   | 191 |   |
| Preferred      stock not subject to mandatory redemption                                     |           | 50 |   |   |   | 50 |   |
| Retained      earnings                                                                       |           | 278 |   |   |   | 276 |   |
| Total      stockholders' equity                                                              |           | 519 |   |   |   | 517 |   |
| TOTAL      LIABILITIES AND STOCKHOLDERS' EQUITY                                              | $              | 1,846 |   |   | $ | 1,860 |   |

----

| CENTRAL      ILLINOIS PUBLIC SERVICE COMPANY               |                                  |
|------------------------------------------------------------|---------------------------------------|
| STATEMENT      OF CASH FLOWS                               |                                  |
| (Unaudited)      (In millions)                             |                                  |
|                                                       |                                  |   |   |   |   |
|                                                       |                                  |   |   |   |   |
|                                                       | Three      Months EndedMarch      31, |   |
|                                                       | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:                 |                                  |   |   |   |   |
| Net      income                                            | $                                     | 3 |   |   | $ | 12 |   |
| Adjustments      to reconcile net income to net cash       |                                  |   |   |   |   |   |   |
| provided      by operating activities:                     |                                  |   |   |   |   |   |   |
| Depreciation      and amortization                         |                                  | 17 |   |   |   | 17 |   |
| Deferred      income taxes and investment tax credits, net |                                  | (5 | ) |   |   | (2 | ) |
| Other                                                      |                                  | - |   |   |   | (1 | ) |
| Changes      in assets and liabilities:                    |                                  |   |   |   |   |   |   |
| Receivables                                                |                                  | (34 | ) |   |   | (39 | ) |
| Materials      and supplies                                |                                  | 46 |   |   |   | 38 |   |
| Accounts      and wages payable                            |                                  | (10 | ) |   |   | (31 | ) |
| Taxes      accrued                                         |                                  | 6 |   |   |   | 4 |   |
| Assets,      other                                         |                                  | 21 |   |   |   | 9 |   |
| Liabilities,      other                                    |                                  | 9 |   |   |   | 3 |   |
| Pension      and other postretirement benefit obligations  |                                  | 2 |   |   |   | - |   |
| Net      cash provided by operating activities             |                                  | 55 |   |   |   | 10 |   |
| Cash      Flows From Investing Activities:                 |                                  |   |   |   |   |   |   |
| Capital      expenditures                                  |                                  | (22 | ) |   |   | (20 | ) |
| Changes      in money pool advances                        |                                  | - |   |   |   | (14 | ) |
| Net      cash used in investing activities                 |                                  | (22 | ) |   |   | (34 | ) |
| Cash      Flows From Financing Activities:                 |                                  |   |   |   |   |   |   |
| Dividends      on preferred stock                          |                                  | (1 | ) |   |   | (1 | ) |
| Short-term      debt, net                                  |                                  | (40 | ) |   |   | 65 |   |
| Net      cash provided by (used in) financing activities   |                                  | (41 | ) |   |   | 64 |   |
| Net      change in cash and cash equivalents               |                                  | (8 | ) |   |   | 40 |   |
| Cash      and cash equivalents at beginning of year        |                                  | 26 |   |   |   | 6 |   |
| Cash      and cash equivalents at end of period            | $                                     | 18 |   |   | $ | 46 |   |
|                                                       |                                  |   |   |   |   |   |   |

----

| AMEREN      ENERGY GENERATING COMPANY |   |
|---------------------------------------|--------|
| CONSOLIDATED      STATEMENT OF INCOME |   |
| (Unaudited)      (In millions)        |   |
|                                  |   |   |   |   |   |   |
|                                  |   |   |   |   |   |   |
|                                  |   | Three      Months EndedMarch      31, |   |
|                                  |   | 2008 |   |   | 2007 |   |
|                                  |   |   |   |   |   |   |
| Operating      Revenues               |   | $ | 231 |   |   | $ | 243 |   |
| Operating      Expenses:              |   |   |   |   |   |   |   |   |
| Fuel                                  |   |   | 88 |   |   |   | 81 |   |
| Purchased      power                  |   |   | - |   |   |   | 21 |   |
| Other      operations and maintenance |   |   | 40 |   |   |   | 34 |   |
| Depreciation      and amortization    |   |   | 16 |   |   |   | 18 |   |
| Taxes      other than income taxes    |   |   | 6 |   |   |   | 6 |   |
| Total      operating expenses         |   |   | 150 |   |   |   | 160 |   |
| Operating      Income                 |   |   | 81 |   |   |   | 83 |   |
| Miscellaneous      Income             |   |   | 2 |   |   |   | - |   |
| Interest      Charges                 |   |   | 9 |   |   |   | 14 |   |
| Income      Before Income Taxes       |   |   | 74 |   |   |   | 69 |   |
| Income      Taxes                     |   |   | 28 |   |   |   | 26 |   |
| Net      Income                       |   | $ | 46 |   |   | $ | 43 |   |

----

| AMEREN      ENERGY GENERATING COMPANY                                                           |           |
|-------------------------------------------------------------------------------------------------|----------------|
| CONSOLIDATED      BALANCE SHEET                                                                 |           |
| (Unaudited)      (In millions, except shares)                                                   |           |
|                                                                                            |           |   |   |   |   |
|                                                                                            | March      31, |   |   | December      31, |   |
|                                                                                            | 2008           |   |   | 2007 |   |
| ASSETS                                                                                          |           |   |   |   |   |
| Current      Assets:                                                                            |           |   |   |   |   |
| Cash      and cash equivalents                                                                  | $              | 2 |   |   | $ | 2 |   |
| Accounts      receivable – affiliates                                                     |           | 107 |   |   |   | 93 |   |
| Accounts      receivable – trade                                                          |           | 13 |   |   |   | 12 |   |
| Materials      and supplies                                                                     |           | 97 |   |   |   | 93 |   |
| Other      current assets                                                                       |           | 9 |   |   |   | 4 |   |
| Total      current assets                                                                       |           | 228 |   |   |   | 204 |   |
| Property      and Plant, Net                                                                    |           | 1,700 |   |   |   | 1,683 |   |
| Intangible      Assets                                                                          |           | 58 |   |   |   | 63 |   |
| Other      Assets                                                                               |           | 5 |   |   |   | 18 |   |
| TOTAL      ASSETS                                                                               | $              | 1,991 |   |   | $ | 1,968 |   |
|                                                                                            |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDER'S EQUITY                                                       |           |   |   |   |   |   |   |
| Current      Liabilities:                                                                       |           |   |   |   |   |   |   |
| Short-term      debt                                                                            | $              | 150 |   |   | $ | 100 |   |
| Current      portion of intercompany note payable – CIPS                                  |           | 39 |   |   |   | 39 |   |
| Borrowings      from money pool                                                                 |           | 9 |   |   |   | 54 |   |
| Accounts      and wages payable                                                                 |           | 39 |   |   |   | 61 |   |
| Accounts      payable – affiliates                                                        |           | 45 |   |   |   | 57 |   |
| Current      portion of intercompany tax payable – CIPS                                   |           | 9 |   |   |   | 9 |   |
| Taxes      accrued                                                                              |           | 29 |   |   |   | 15 |   |
| Other      current liabilities                                                                  |           | 56 |   |   |   | 30 |   |
| Total      current liabilities                                                                  |           | 376 |   |   |   | 365 |   |
| Long-term      Debt, Net                                                                        |           | 474 |   |   |   | 474 |   |
| Intercompany      Note Payable – CIPS                                                     |           | 87 |   |   |   | 87 |   |
| Deferred      Credits and Other Liabilities:                                                    |           |   |   |   |   |   |   |
| Accumulated      deferred income taxes, net                                                     |           | 163 |   |   |   | 161 |   |
| Accumulated      deferred investment tax credits                                                |           | 7 |   |   |   | 7 |   |
| Intercompany      tax payable – CIPS                                                      |           | 103 |   |   |   | 105 |   |
| Asset      retirement obligations                                                               |           | 48 |   |   |   | 47 |   |
| Accrued      pension and other postretirement benefits                                          |           | 32 |   |   |   | 32 |   |
| Other      deferred credits and liabilities                                                     |           | 34 |   |   |   | 42 |   |
| Total      deferred credits and other liabilities                                               |           | 387 |   |   |   | 394 |   |
| Commitments      and Contingencies (Notes 2, 8 and 9)                                           |           |   |   |   |   |   |   |
| Stockholder's      Equity:                                                                      |           |   |   |   |   |   |   |
| Common      stock, no par value, 10,000 shares authorized – 2,000 shares      outstanding |           | - |   |   |   | - |   |
| Other      paid-in capital                                                                      |           | 503 |   |   |   | 503 |   |
| Retained      earnings                                                                          |           | 189 |   |   |   | 167 |   |
| Accumulated      other comprehensive loss                                                       |           | (25 | ) |   |   | (22 | ) |
| Total      stockholder's equity                                                                 |           | 667 |   |   |   | 648 |   |
| TOTAL      LIABILITIES AND STOCKHOLDER'S EQUITY                                                 | $              | 1,991 |   |   | $ | 1,968 |   |
|                                                                                            |           |   |   |   |   |   |   |

----

| AMEREN      ENERGY GENERATING COMPANY                      |                                  |
|------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF CASH FLOWS                  |                                  |
| (Unaudited)      (In millions)                             |                                  |
|                                                       |                                  |   |   |   |   |
|                                                       |                                  |   |   |   |   |
|                                                       | Three      Months EndedMarch      31, |   |
|                                                       | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:                 |                                  |   |   |   |   |
| Net      income                                            | $                                     | 46 |   |   | $ | 43 |   |
| Adjustments      to reconcile net income to net cash       |                                  |   |   |   |   |   |   |
| provided      by operating activities:                     |                                  |   |   |   |   |   |   |
| Gain      on sales of emission allowances                  |                                  | (1 | ) |   |   | (1 | ) |
| Mark-to-market      (gain) loss on derivatives             |                                  | (5 | )  |   |   | - |   |
| Depreciation      and amortization                         |                                  | 23 |   |   |   | 26 |   |
| Deferred      income taxes and investment tax credits, net |                                  | 8 |   |   |   | 2 |   |
| Other                                                      |                                  | - |   |   |   | 1 |   |
| Changes      in assets and liabilities:                    |                                  |   |   |   |   |   |   |
| Receivables                                                |                                  | (9 | ) |   |   | 18 |   |
| Materials      and supplies                                |                                  | (4 | ) |   |   | - |   |
| Accounts      and wages payable                            |                                  | (8 | ) |   |   | (42 | ) |
| Taxes      accrued, net                                    |                                  | 14 |   |   |   | 16 |   |
| Assets,      other                                         |                                  | 9 |   |   |   | (2 | ) |
| Liabilities,      other                                    |                                  | 5 |   |   |   | 7 |   |
| Pension      and other postretirement benefit obligations  |                                  | 1 |   |   |   | 1 |   |
| Net      cash provided by operating activities             |                                  | 79 |   |   |   | 69 |   |
| Cash      Flows From Investing Activities:                 |                                  |   |   |   |   |   |   |
| Capital      expenditures                                  |                                  | (58 | ) |   |   | (37 | ) |
| Purchases      of emission allowances                      |                                  | (2 | ) |   |   | - |   |
| Net      cash used in investing activities                 |                                  | (60 | ) |   |   | (37 | ) |
| Cash      Flows From Financing Activities:                 |                                  |   |   |   |   |   |   |
| Dividends      on common stock                             |                                  | (24 | ) |   |   | (39 | ) |
| Short-term      debt, net                                  |                                  | 50 |   |   |   | - |   |
| Changes      in money pool borrowings                      |                                  | (45 | ) |   |   | 7 |   |
| Net      cash used in financing activities                 |                                  | (19 | ) |   |   | (32 | ) |
| Net      change in cash and cash equivalents               |                                  | - |   |   |   | - |   |
| Cash      and cash equivalents at beginning of year        |                                  | 2 |   |   |   | 1 |   |
| Cash      and cash equivalents at end of period            | $                                     | 2 |   |   | $ | 1 |   |

----

| CILCORP      INC.                             |   |
|-----------------------------------------------|--------|
| CONSOLIDATED      STATEMENT OF INCOME         |   |
| (Unaudited)      (In millions)                |   |
|                                          |   |   |   |   |   |   |
|                                          |   | Three      Months EndedMarch      31, |   |
|                                          |   | 2008 |   |   | 2007 |   |
| Operating      Revenues:                      |   |   |   |   |   |   |
| Electric                                      |   | $ | 194 |   |   | $ | 180 |   |
| Gas                                           |   |   | 151 |   |   |   | 135 |   |
| Total      operating revenues                 |   |   | 345 |   |   |   | 315 |   |
| Operating      Expenses:                      |   |   |   |   |   |   |   |   |
| Fuel                                          |   |   | 28 |   |   |   | 23 |   |
| Purchased      power                          |   |   | 78 |   |   |   | 76 |   |
| Gas      purchased for resale                 |   |   | 115 |   |   |   | 103 |   |
| Other      operations and maintenance         |   |   | 45 |   |   |   | 40 |   |
| Depreciation      and amortization            |   |   | 23 |   |   |   | 21 |   |
| Taxes      other than income taxes            |   |   | 9 |   |   |   | 8 |   |
| Total      operating expenses                 |   |   | 298 |   |   |   | 271 |   |
|     Operating      Income |   |   | 47 |   |   |   | 44 |   |
| Other      Income and Expenses:               |   |   |   |   |   |   |   |   |
| Miscellaneous      income                     |   |   | - |   |   |   | 2 |   |
| Miscellaneous      expense                    |   |   | - |   |   |   | (1 | ) |
| Total      other income                       |   |   | - |   |   |   | 1 |   |
| Interest      Charges                         |   |   | 15 |   |   |   | 14 |   |
| Income      Before Income Taxes               |   |   | 32 |   |   |   | 31 |   |
| Income      Taxes                             |   |   | 12 |   |   |   | 10 |   |
| Net      Income                               |   | $ | 20 |   |   | $ | 21 |   |

| The      accompanying notes as they relate to CILCORP are an integral part of these      consolidated financial statements. |
|-----------------------------------------------------------------------------------------------------------------------------|

----

| CILCORP      INC.                                                                               |           |
|-------------------------------------------------------------------------------------------------|----------------|
| CONSOLIDATED      BALANCE SHEET                                                                 |           |
| (Unaudited)      (In millions, except shares)                                                   |           |
|                                                                                            |           |   |   |   |   |
|                                                                                            | March      31, |   |   | December      31, |   |
|                                                                                            | 2008           |   |   | 2007 |   |
|                                                                                            |           |   |   |   |   |
| ASSETS                                                                                          |           |   |   |   |   |
| Current      Assets:                                                                            |           |   |   |   |   |
| Cash      and cash equivalents                                                                  | $              | 42 |   |   | $ | 6 |   |
| Accounts      receivable – trade (less allowance for doubtful                             |           |   |   |   |   |   |   |
| accounts      of $6 and $2, respectively)                                                       |           | 88 |   |   |   | 52 |   |
| Unbilled      revenue                                                                           |           | 50 |   |   |   | 54 |   |
| Accounts      receivable – affiliates                                                     |           | 58 |   |   |   | 47 |   |
| Advances      to money pool                                                                     |           | 2 |   |   |   | 2 |   |
| Materials      and supplies                                                                     |           | 61 |   |   |   | 110 |   |
| Other      current assets                                                                       |           | 43 |   |   |   | 40 |   |
| Total      current assets                                                                       |           | 344 |   |   |   | 311 |   |
| Property      and Plant, Net                                                                    |           | 1,517 |   |   |   | 1,494 |   |
| Investments      and Other Assets:                                                              |           |   |   |   |   |   |   |
| Goodwill                                                                                        |           | 542 |   |   |   | 542 |   |
| Intangible      assets                                                                          |           | 40 |   |   |   | 41 |   |
| Regulatory      assets                                                                          |           | 30 |   |   |   | 32 |   |
| Other      assets                                                                               |           | 40 |   |   |   | 39 |   |
| Total      investments and other assets                                                         |           | 652 |   |   |   | 654 |   |
| TOTAL      ASSETS                                                                               | $              | 2,513 |   |   | $ | 2,459 |   |
|                                                                                            |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDER'S EQUITY                                                       |           |   |   |   |   |   |   |
| Current      Liabilities:                                                                       |           |   |   |   |   |   |   |
| Current      maturities of long-term debt                                                       | $              | 19 |   |   | $ | - |   |
| Short-term      debt                                                                            |           | 530 |   |   |   | 520 |   |
| Borrowings      from money pool, net                                                            |           | 3 |   |   |   | 2 |   |
| Accounts      and wages payable                                                                 |           | 57 |   |   |   | 75 |   |
| Accounts      payable – affiliates                                                        |           | 40 |   |   |   | 34 |   |
| Taxes      accrued                                                                              |           | 11 |   |   |   | 3 |   |
| Other      current liabilities                                                                  |           | 67 |   |   |   | 54 |   |
| Total      current liabilities                                                                  |           | 727 |   |   |   | 688 |   |
| Long-term      Debt, Net                                                                        |           | 517 |   |   |   | 537 |   |
| Preferred      Stock of Subsidiary Subject to Mandatory Redemption                              |           | 16 |   |   |   | 16 |   |
| Deferred      Credits and Other Liabilities:                                                    |           |   |   |   |   |   |   |
| Accumulated      deferred income taxes, net                                                     |           | 185 |   |   |   | 193 |   |
| Accumulated      deferred investment tax credits                                                |           | 6 |   |   |   | 6 |   |
| Regulatory      liabilities                                                                     |           | 113 |   |   |   | 92 |   |
| Accrued      pension and other postretirement benefits                                          |           | 127 |   |   |   | 127 |   |
| Other      deferred credits and liabilities                                                     |           | 69 |   |   |   | 66 |   |
| Total      deferred credits and other liabilities                                               |           | 500 |   |   |   | 484 |   |
| Preferred      Stock of Subsidiary Not Subject to Mandatory Redemption                          |           | 19 |   |   |   | 19 |   |
| Commitments      and Contingencies (Notes 2, 8 and 9)                                           |           |   |   |   |   |   |   |
| Stockholder's      Equity:                                                                      |           |   |   |   |   |   |   |
| Common      stock, no par value, 10,000 shares authorized – 1,000 shares      outstanding |           | - |   |   |   | - |   |
| Other      paid-in capital                                                                      |           | 627 |   |   |   | 627 |   |
| Retained      earnings                                                                          |           | 78 |   |   |   | 58 |   |
| Accumulated      other comprehensive income                                                     |           | 29 |   |   |   | 30 |   |
| Total      stockholder's equity                                                                 |           | 734 |   |   |   | 715 |   |
| TOTAL      LIABILITIES AND STOCKHOLDER'S EQUITY                                                 | $              | 2,513 |   |   | $ | 2,459 |   |
|                                                                                            |           |   |   |   |   |   |   |

----

| CILCORP      INC.                                        |                                  |
|----------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF CASH FLOWS                |                                  |
| (Unaudited)      (In millions)                           |                                  |
|                                                     |                                  |   |   |   |   |
|                                                     |                                  |   |   |   |   |
|                                                     | Three      Months EndedMarch      31, |   |
|                                                     | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:               |                                  |   |   |   |   |
| Net      income                                          | $                                     | 20 |   |   | $ | 21 |   |
| Adjustments      to reconcile net income to net cash     |                                  |   |   |   |   |   |   |
| provided      by operating activities:                   |                                  |   |   |   |   |   |   |
| Mark-to-market      (gain) loss on derivatives           |                                  | (1 | )  |   |   | - |   |
| Depreciation      and amortization                       |                                  | 23 |   |   |   | 20 |   |
| Deferred      income taxes and investment tax credits    |                                  | 4 |   |   |   | (2 | ) |
| Other                                                    |                                  | - |   |   |   | (1 | ) |
| Changes      in assets and liabilities:                  |                                  |   |   |   |   |   |   |
| Receivables                                              |                                  | (42 | ) |   |   | (39 | ) |
| Materials      and supplies                              |                                  | 49 |   |   |   | 48 |   |
| Accounts      and wages payable                          |                                  | 24 |   |   |   | (30 | ) |
| Taxes      accrued                                       |                                  | 8 |   |   |   | 2 |   |
| Assets,      other                                       |                                  | 7 |   |   |   | 11 |   |
| Liabilities,      other                                  |                                  | 13 |   |   |   | 10 |   |
| Pension      and postretirement benefit obligations      |                                  | (2 | ) |   |   | 2 |   |
| Net      cash provided by operating activities           |                                  | 103 |   |   |   | 42 |   |
| Cash      Flows From Investing Activities:               |                                  |   |   |   |   |   |   |
| Capital      expenditures                                |                                  | (79 | ) |   |   | (43 | ) |
| Changes      in money pool advances                      |                                  | - |   |   |   | 42 |   |
| Other                                                    |                                  | 1 |   |   |   | - |   |
| Net      cash used in investing activities               |                                  | (78 | ) |   |   | (1 | ) |
| Cash      Flows From Financing Activities:               |                                  |   |   |   |   |   |   |
| Short-term      debt, net                                |                                  | 10 |   |   |   | 74 |   |
| Changes      in money pool borrowings                    |                                  | - |   |   |   | 31 |   |
| Intercompany      note payable – Ameren, net       |                                  | 1 |   |   |   | (73 | ) |
| Redemptions,      repurchases, and maturities:           |                                  |   |   |   |   |   |   |
| Long-term      debt                                      |                                  | - |   |   |   | (50 | ) |
| Net      cash provided by (used in) financing activities |                                  | 11 |   |   |   | (18 | ) |
|                                                     |                                  |   |   |   |   |   |   |
| Net      change in cash and cash equivalents             |                                  | 36 |   |   |   | 23 |   |
| Cash      and cash equivalents at beginning of year      |                                  | 6 |   |   |   | 4 |   |
| Cash      and cash equivalents at end of period          | $                                     | 42 |   |   | $ | 27 |   |

----

| CENTRAL      ILLINOIS LIGHT COMPANY   |                                  |
|---------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF INCOME |                                  |
| (Unaudited)      (In millions)        |                                  |
|                                  |                                  |   |   |   |   |
|                                  | Three      Months EndedMarch      31, |   |
|                                  | 2008                                  |   |   | 2007 |   |
| Operating      Revenues:              |                                  |   |   |   |   |
| Electric                              | $                                     | 194 |   |   | $ | 180 |   |
| Gas                                   |                                  | 151 |   |   |   | 135 |   |
| Total      operating revenues         |                                  | 345 |   |   |   | 315 |   |
|                                  |                                  |   |   |   |   |   |   |
| Operating      Expenses:              |                                  |   |   |   |   |   |   |
| Fuel                                  |                                  | 27 |   |   |   | 22 |   |
| Purchased      power                  |                                  | 78 |   |   |   | 76 |   |
| Gas      purchased for resale         |                                  | 115 |   |   |   | 103 |   |
| Other      operations and maintenance |                                  | 48 |   |   |   | 41 |   |
| Depreciation      and amortization    |                                  | 20 |   |   |   | 18 |   |
| Taxes      other than income taxes    |                                  | 9 |   |   |   | 8 |   |
| Total      operating expenses         |                                  | 297 |   |   |   | 268 |   |
| Operating      Income                 |                                  | 48 |   |   |   | 47 |   |
| Other      Income and Expenses:       |                                  |   |   |   |   |   |   |
| Miscellaneous      income             |                                  | - |   |   |   | 1 |   |
| Miscellaneous      expense            |                                  | - |   |   |   | (1 | ) |
| Total      other income               |                                  | - |   |   |   | - |   |
| Interest      Charges                 |                                  | 6 |   |   |   | 6 |   |
| Income      Before Income Taxes       |                                  | 42 |   |   |   | 41 |   |
| Income      Taxes                     |                                  | 16 |   |   |   | 14 |   |
| Net      Income                       | $                                     | 26 |   |   | $ | 27 |   |

----

| CENTRAL      ILLINOIS LIGHT COMPANY                                                          |           |
|----------------------------------------------------------------------------------------------|----------------|
| CONSOLIDATED      BALANCE SHEET                                                              |           |
| (Unaudited)      (In millions)                                                               |           |
|                                                                                         |           |   |   |   |   |
|                                                                                         | March      31, |   |   | December      31, |   |
|                                                                                         | 2008           |   |   | 2007 |   |
| ASSETS                                                                                       |           |   |   |   |   |
| Current      Assets:                                                                         |           |   |   |   |   |
| Cash      and cash equivalents                                                               | $              | 42 |   |   | $ | 6 |   |
| Accounts      receivable – trade (less allowance for doubtful                          |           |   |   |   |   |   |   |
| accounts      of $6 and $2, respectively)                                                    |           | 88 |   |   |   | 52 |   |
| Unbilled      revenue                                                                        |           | 50 |   |   |   | 54 |   |
| Accounts      receivable – affiliates                                                  |           | 55 |   |   |   | 45 |   |
| Materials      and supplies                                                                  |           | 61 |   |   |   | 110 |   |
| Other      current assets                                                                    |           | 42 |   |   |   | 27 |   |
| Total      current assets                                                                    |           | 338 |   |   |   | 294 |   |
| Property      and Plant, Net                                                                 |           | 1,516 |   |   |   | 1,492 |   |
| Investments      and Other Assets:                                                           |           |   |   |   |   |   |   |
| Intangible      assets                                                                       |           | 1 |   |   |   | 1 |   |
| Regulatory      assets                                                                       |           | 30 |   |   |   | 32 |   |
| Other      assets                                                                            |           | 44 |   |   |   | 43 |   |
| TOTAL      ASSETS                                                                            | $              | 1,929 |   |   | $ | 1,862 |   |
|                                                                                         |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDERS' EQUITY                                                    |           |   |   |   |   |   |   |
| Current      Liabilities:                                                                    |           |   |   |   |   |   |   |
| Current      maturities of long-term debt                                                    | $              | 19 |   |   | $ | - |   |
| Short-term      debt                                                                         |           | 355 |   |   |   | 345 |   |
| Accounts      and wages payable                                                              |           | 57 |   |   |   | 75 |   |
| Accounts      payable – affiliates                                                     |           | 40 |   |   |   | 34 |   |
| Taxes      accrued                                                                           |           | 17 |   |   |   | 3 |   |
| Other      current liabilities                                                               |           | 50 |   |   |   | 45 |   |
| Total      current liabilities                                                               |           | 538 |   |   |   | 502 |   |
| Long-term      Debt, Net                                                                     |           | 129 |   |   |   | 148 |   |
| Preferred      Stock Subject to Mandatory Redemption                                         |           | 16 |   |   |   | 16 |   |
| Deferred      Credits and Other Liabilities:                                                 |           |   |   |   |   |   |   |
| Accumulated      deferred income taxes, net                                                  |           | 155 |   |   |   | 155 |   |
| Accumulated      deferred investment tax credits                                             |           | 6 |   |   |   | 6 |   |
| Regulatory      liabilities                                                                  |           | 241 |   |   |   | 220 |   |
| Accrued      pension and other postretirement benefits                                       |           | 127 |   |   |   | 127 |   |
| Other      deferred credits and liabilities                                                  |           | 69 |   |   |   | 66 |   |
| Total      deferred credits and other liabilities                                            |           | 598 |   |   |   | 574 |   |
| Commitments      and Contingencies (Notes 2, 8 and 9)                                        |           |   |   |   |   |   |   |
| Stockholders'      Equity:                                                                   |           |   |   |   |   |   |   |
| Common      stock, no par value, 20.0 shares authorized – 13.6 shares      outstanding |           | - |   |   |   | - |   |
| Preferred      stock not subject to mandatory redemption                                     |           | 19 |   |   |   | 19 |   |
| Other      paid-in capital                                                                   |           | 429 |   |   |   | 429 |   |
| Retained      earnings                                                                       |           | 198 |   |   |   | 172 |   |
| Accumulated      other comprehensive income                                                  |           | 2 |   |   |   | 2 |   |
| Total      stockholders' equity                                                              |           | 648 |   |   |   | 622 |   |
| TOTAL      LIABILITIES AND STOCKHOLDERS' EQUITY                                              | $              | 1,929 |   |   | $ | 1,862 |   |

----

| CENTRAL      ILLINOIS LIGHT COMPANY                        |                                  |
|------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF CASH FLOWS                  |                                  |
| (Unaudited)      (In millions)                             |                                  |
|                                                       |                                  |   |   |   |   |
|                                                       | Three      Months EndedMarch      31, |   |
|                                                       | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:                 |                                  |   |   |   |   |
| Net      income                                            | $                                     | 26 |   |   | $ | 27 |   |
| Adjustments      to reconcile net income to net cash       |                                  |   |   |   |   |   |   |
| provided      by operating activities:                     |                                  |   |   |   |   |   |   |
| Mark-to-market      (gain) loss on derivatives        |                                  | (1 | ) |   |   | - |   |
| Depreciation      and amortization                         |                                  | 20 |   |   |   | 19 |   |
| Deferred      income taxes and investment tax credits, net |                                  | 3 |   |   |   | (3 | ) |
| Other                                                      |                                  | - |   |   |   | (1 | ) |
| Changes      in assets and liabilities:                    |                                  |   |   |   |   |   |   |
| Receivables                                                |                                  | (41 | ) |   |   | (35 | ) |
| Materials      and supplies                                |                                  | 49 |   |   |   | 48 |   |
| Accounts      and wages payable                            |                                  | 24 |   |   |   | (17 | ) |
| Taxes      accrued                                         |                                  | 14 |   |   |   | 11 |   |
| Assets,      other                                         |                                  | 4 |   |   |   | 2 |   |
| Liabilities,      other                                    |                                  | 5 |   |   |   | 5 |   |
| Pension      and postretirement benefit obligations        |                                  | 1 |   |   |   | 2 |   |
| Net      cash provided by operating activities             |                                  | 104 |   |   |   | 58 |   |
| Cash      Flows From Investing Activities:                 |                                  |   |   |   |   |   |   |
| Capital      expenditures                                  |                                  | (79 | ) |   |   | (43 | ) |
| Changes      in money pool advances                        |                                  | - |   |   |   | 42 |   |
| Other                                                      |                                  | 1 |   |   |   | - |   |
| Net      cash used in investing activities                 |                                  | (78 | ) |   |   | (1 | ) |
| Cash      Flows From Financing Activities:                 |                                  |   |   |   |   |   |   |
| Short-term      debt, net                                  |                                  | 10 |   |   |   | (30 | ) |
| Changes      in money pool borrowings                      |                                  | - |   |   |   | 31 |   |
| Redemptions,      repurchases, and maturities:             |                                  |   |   |   |   |   |   |
| Long-term      debt                                        |                                  | - |   |   |   | (50 | ) |
| Capital      contribution from parent                      |                                  | - |   |   |   | 14 |   |
| Net      cash provided by (used in) financing activities   |                                  | 10 |   |   |   | (35 | ) |
| Net      change in cash and cash equivalents               |                                  | 36 |   |   |   | 22 |   |
| Cash      and cash equivalents at beginning of year        |                                  | 6 |   |   |   | 3 |   |
| Cash      and cash equivalents at end of period            | $                                     | 42 |   |   | $ | 25 |   |
|                                                       |                                  |   |   |   |   |   |   |

----

| ILLINOIS      POWER COMPANY                     |                                  |
|-------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF INCOME           |                                  |
| (Unaudited)      (In millions)                  |                                  |
|                                            |                                  |   |   |   |   |
|                                            |                                  |   |   |   |   |
|                                            | Three      Months EndedMarch      31, |   |
|                                            | 2008                                  |   |   | 2007 |   |
| Operating      Revenues:                        |                                  |   |   |   |   |
| Electric                                        | $                                     | 238 |   |   | $ | 272 |   |
| Gas                                             |                                  | 264 |   |   |   | 241 |   |
| Other                                           |                                  | 1 |   |   |   | 2 |   |
| Total      operating revenues                   |                                  | 503 |   |   |   | 515 |   |
|                                            |                                  |   |   |   |   |   |   |
| Operating      Expenses:                        |                                  |   |   |   |   |   |   |
| Purchased      power                            |                                  | 153 |   |   |   | 185 |   |
| Gas      purchased for resale                   |                                  | 205 |   |   |   | 185 |   |
| Other      operations and maintenance           |                                  | 66 |   |   |   | 54 |   |
| Depreciation      and amortization              |                                  | 25 |   |   |   | 26 |   |
| Amortization      of regulatory assets          |                                  | 4 |   |   |   | 4 |   |
| Taxes      other than income taxes              |                                  | 23 |   |   |   | 21 |   |
| Total      operating expenses                   |                                  | 476 |   |   |   | 475 |   |
|                                            |                                  |   |   |   |   |   |   |
| Operating      Income                           |                                  | 27 |   |   |   | 40 |   |
|                                            |                                  |   |   |   |   |   |   |
| Other      Income and Expenses:                 |                                  |   |   |   |   |   |   |
| Miscellaneous      income                       |                                  | 3 |   |   |   | 2 |   |
| Miscellaneous      expense                      |                                  | (1 | ) |   |   | (1 | ) |
| Total      other income                         |                                  | 2 |   |   |   | 1 |   |
|                                            |                                  |   |   |   |   |   |   |
| Interest      Charges                           |                                  | 24 |   |   |   | 16 |   |
|                                            |                                  |   |   |   |   |   |   |
| Income      Before Income Taxes                 |                                  | 5 |   |   |   | 25 |   |
|                                            |                                  |   |   |   |   |   |   |
| Income      Taxes                               |                                  | 2 |   |   |   | 10 |   |
|                                            |                                  |   |   |   |   |   |   |
| Net      Income                                 |                                  | 3 |   |   |   | 15 |   |
|                                            |                                  |   |   |   |   |   |   |
| Preferred      Stock Dividends                  |                                  | 1 |   |   |   | 1 |   |
|                                            |                                  |   |   |   |   |   |   |
| Net      Income Available to Common Stockholder | $                                     | 2 |   |   | $ | 14 |   |
|                                            |                                  |   |   |   |   |   |   |

----

| ILLINOIS      POWER COMPANY                                                                   |           |
|-----------------------------------------------------------------------------------------------|----------------|
| CONSOLIDATED      BALANCE SHEET                                                               |           |
| (Unaudited)      (In millions)                                                                |           |
|                                                                                          |           |   |   |   |   |
|                                                                                          | March      31, |   |   | December      31, |   |
|                                                                                          | 2008           |   |   | 2007 |   |
| ASSETS                                                                                        |           |   |   |   |   |
| Current      Assets:                                                                          |           |   |   |   |   |
| Cash      and cash equivalents                                                                | $              | 1 |   |   | $ | 6 |   |
| Accounts      receivable - trade (less allowance for doubtful                                 |           |   |   |   |   |   |   |
| accounts      of $16 and $9, respectively)                                                    |           | 208 |   |   |   | 137 |   |
| Unbilled      revenue                                                                         |           | 78 |   |   |   | 118 |   |
| Accounts      receivable – affiliates                                                   |           | 11 |   |   |   | 17 |   |
| Materials      and supplies                                                                   |           | 47 |   |   |   | 134 |   |
| Other      current assets                                                                     |           | 74 |   |   |   | 38 |   |
| Total      current assets                                                                     |           | 419 |   |   |   | 450 |   |
| Property      and Plant, Net                                                                  |           | 2,230 |   |   |   | 2,220 |   |
| Investments      and Other Assets:                                                            |           |   |   |   |   |   |   |
| Investment      in IP SPT                                                                     |           | 11 |   |   |   | 10 |   |
| Goodwill                                                                                      |           | 214 |   |   |   | 214 |   |
| Other      assets                                                                             |           | 117 |   |   |   | 109 |   |
| Regulatory      assets                                                                        |           | 298 |   |   |   | 316 |   |
| Total      investments and other assets                                                       |           | 640 |   |   |   | 649 |   |
| TOTAL      ASSETS                                                                             | $              | 3,289 |   |   | $ | 3,319 |   |
|                                                                                          |           |   |   |   |   |   |   |
| LIABILITIES      AND STOCKHOLDERS’ EQUITY                                               |           |   |   |   |   |   |   |
| Current      Liabilities:                                                                     |           |   |   |   |   |   |   |
| Current      maturities of long-term debt                                                     | $              | 337 |   |   | $  | - |   |
| Current      maturities of long-term debt payable to IP SPT                                   |           | 36 |   |   |   | 54 |   |
| Short-term      debt                                                                          |           | 150 |   |   |   | 175 |   |
| Accounts      and wages payable                                                               |           | 74 |   |   |   | 85 |   |
| Accounts      payable – affiliates                                                      |           | 28 |   |   |   | 36 |   |
| Taxes      accrued                                                                            |           | 10 |   |   |   | 7 |   |
| Other      current liabilities                                                                |           | 90 |   |   |   | 80 |   |
| Total      current liabilities                                                                |           | 725 |   |   |   | 437 |   |
| Long-term      Debt, Net                                                                      |           | 675 |   |   |   | 1,014 |   |
| Long-term      Debt Payable to IP SPT                                                         |           | - |   |   |   | 2 |   |
| Deferred      Credits and Other Liabilities:                                                  |           |   |   |   |   |   |   |
| Regulatory      liabilities                                                                   |           | 166 |   |   |   | 129 |   |
| Accrued      pension and other postretirement benefits                                        |           | 192 |   |   |   | 189 |   |
| Accumulated      deferred income taxes                                                        |           | 141 |   |   |   | 148 |   |
| Other      deferred credits and liabilities                                                   |           | 96 |   |   |   | 92 |   |
| Total      deferred credits and other liabilities                                             |           | 595 |   |   |   | 558 |   |
| Commitments      and Contingencies (Notes 2, 8 and 9)                                         |           |   |   |   |   |   |   |
| Stockholders’      Equity:                                                              |           |   |   |   |   |   |   |
| Common      stock, no par value, 100.0 shares authorized – 23.0 shares      outstanding |           | - |   |   |   | - |   |
| Other      paid-in-capital                                                                    |           | 1,194 |   |   |   | 1,194 |   |
| Preferred      stock not subject to mandatory redemption                                      |           | 46 |   |   |   | 46 |   |
| Retained      earnings                                                                        |           | 50 |   |   |   | 64 |   |
| Accumulated      other comprehensive income                                                   |           | 4 |   |   |   | 4 |   |
| Total      stockholders’ equity                                                         |           | 1,294 |   |   |   | 1,308 |   |
| TOTAL      LIABILITIES AND STOCKHOLDERS’ EQUITY                                         | $              | 3,289 |   |   | $ | 3,319 |   |
|                                                                                          |           |   |   |   |   |   |   |

----

| ILLINOIS      POWER COMPANY                                    |                                  |
|----------------------------------------------------------------|---------------------------------------|
| CONSOLIDATED      STATEMENT OF CASH FLOWS                      |                                  |
| (Unaudited)      (In millions)                                 |                                  |
|                                                           |                                  |   |   |   |   |
|                                                           |                                  |   |   |   |   |
|                                                           | Three      Months EndedMarch      31, |   |
|                                                           | 2008                                  |   |   | 2007 |   |
| Cash      Flows From Operating Activities:                     |                                  |   |   |   |   |
| Net      income                                                | $                                     | 3 |   |   | $ | 15 |   |
| Adjustments      to reconcile net income to net cash           |                                  |   |   |   |   |   |   |
|   provided      by operating activities:             |                                  |   |   |   |   |   |   |
| Depreciation      and amortization                             |                                  | 26 |   |   |   | 22 |   |
| Amortization      of debt issuance costs and premium/discounts |                                  | 2 |   |   |   | 2 |   |
| Deferred      income taxes                                     |                                  | 2 |   |   |   | 5 |   |
| Other                                                          |                                  | (1 | ) |   |   | - |   |
| Changes      in assets and liabilities:                        |                                  |   |   |   |   |   |   |
| Receivables                                                    |                                  | (25 | ) |   |   | (40 | ) |
| Materials      and supplies                                    |                                  | 87 |   |   |   | 70 |   |
| Accounts      and wages payable                                |                                  | (15 | ) |   |   | (38 | ) |
| Assets,      other                                             |                                  | (16 | ) |   |   | 17 |   |
| Liabilities,      other                                        |                                  | 24 |   |   |   | 3 |   |
| Pension      and other postretirement benefit obligations      |                                  | 2 |   |   |   | 2 |   |
| Net      cash provided by operating activities                 |                                  | 89 |   |   |   | 58 |   |
|                                                           |                                  |   |   |   |   |   |   |
| Cash      Flows From Investing Activities:                     |                                  |   |   |   |   |   |   |
| Capital      expenditures                                      |                                  | (33 | ) |   |   | (46 | ) |
| Changes      in money pool advances                            |                                  | - |   |   |   | (16 | ) |
| Other                                                          |                                  | (1 | ) |   |   | - |   |
| Net      cash used in investing activities                     |                                  | (34 | ) |   |   | (62 | ) |
|                                                           |                                  |   |   |   |   |   |   |
| Cash      Flows From Financing Activities:                     |                                  |   |   |   |   |   |   |
| Dividends      on common stock                                 |                                  | (15 | ) |   |   | - |   |
| Dividends      on preferred stock                              |                                  | (1 | ) |   |   | (1 | ) |
| Short-term      debt, net                                      |                                  | (25 | ) |   |   | 115 |   |
| Changes      in money pool borrowings, net                     |                                  | - |   |   |   | (43 | ) |
| IP      SPT maturities                                         |                                  | (21 | ) |   |   | (22 | ) |
| Overfunding      of TFNs                                       |                                  | 2 |   |   |   | (2 | ) |
| Net      cash provided by (used in) financing activities       |                                  | (60 | ) |   |   | 47 |   |
| Net      change in cash and cash equivalents                   |                                  | (5 | ) |   |   | 43 |   |
| Cash      and cash equivalents at beginning of year            |                                  | 6 |   |   |   | - |   |
| Cash      and cash equivalents at end of period                | $                                     | 1 |   |   | $ | 43 |   |

----

| ·   | UE,      or Union Electric Company, also known as AmerenUE, operates a      rate-regulated electric generation, transmission and distribution      business, and a rate-regulated natural gas transmission and distribution      business in Missouri. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CIPS,      or Central Illinois Public Service Company, also known as AmerenCIPS,      operates a rate-regulated electric and natural gas transmission and      distribution business in Illinois. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Genco,      or Ameren Energy Generating Company, operates a non-rate-regulated      electric generation business in Illinois and  Missouri. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CILCO,      or Central Illinois Light Company, also known as AmerenCILCO, is a      subsidiary of CILCORP (a holding company). It operates a rate-regulated      electric transmission and distribution business, a non-rate-regulated      electric generation business (through its subsidiary, AERG) and a      rate-regulated natural gas transmission and distribution business, in      Illinois. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | IP,      or Illinois Power Company, also known as AmerenIP, operates a      rate-regulated electric and natural gas transmission and distribution      business in Illinois. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                    | Three      Months |   |
|-------------------------|-------------------|--------|
|                    | 2008              |   |   | 2007 |   |
| Operating      revenues | $                 | 110    |   |   | $ | 97 |   |
| Operating      income   |              | 64     |   |   |   | 54 |   |
| Net      income         |              | 39     |   |   |   | 34 |   |

----

|                                                                                                                                                                                                                                                                                                                                                                 |   | Performance      Share Units |      |                                                 | Restricted      Shares |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|------------------------------|-----------|------------------------------------------------------|------------------------|
|                                                                                                                                                                                                                                                                                                                                                                 |   | Shares                       |      |  Weighted-average      Fair Value      Per Unit |                   | Shares |   |  Weighted-average      Fair      Value Per Share |
| Nonvested      at January 1,      2008                                                      |   |                         | 669,403   |                                                 |                   | $ | 57.88 |   |   |   | 316,768 |   |   | $ | 46.23 |   |
| Granted(a)                                                                                  |   |                         | 495,847   |                                                 |                   |   | 47.57 |   |   |   | - |   |   |   | - |   |
| Dividends                                                                                                                                                                                                                                                                                                                                                            |   |                         | -         |                                                 |                   |   | - |   |   |   | 2,900 |   |   |   | 43.71 |   |
| Forfeitures                                                                                 |   |                         | -         |                                                 |                   |   | - |   |   |   | (3,543 | ) |   |   | 47.11 |   |
| Vested(b)                                                                                   |   |                         | (40,575   | )                                                    |                   |   | 53.48 |   |   |   | (113,640 | ) |   |   | 44.05 |   |
| Nonvested      at March 31,      2008                                                       |   |                         | 1,124,675 |                                                 |                   | $ | 53.50 |   |   |   | 202,485 |   |   | $ | 47.46 |   |

| (a)   | Includes      performance share units (share units) granted to certain executive and      non-executive officers and other eligible employees in February 2008 under      the 2006 Plan. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Share      units vested due to attainment of retirement eligibility by certain      employees. Actual shares issued for retirement-eligible employees will      vary depending on actual performance over the three-year measurement      period. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                        | Ameren(a)               | UE                          | Genco                       | CILCORP(b)                  | CILCO                 |
|-----------------------------|-------------------------|-----------------------------|-----------------------------|-----------------------------|-----------------------|
| March      31, 2008         |                    |                        |                        |                        |                  |
| Emission      allowances(c) | $         189 | $         54 | $         58 | $         40 | $         1 |

|  | (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|--|-----------------|----------------------------------------------------------------------------------------------------------------|

|  | (b)   | Includes      fair market value adjustments recorded in connection with Ameren’s      acquisition of CILCORP. |
|--|-----------------|---------------------------------------------------------------------------------------------------------------------|

|  | (c)   | Emission      allowances consist of various individual emission allowance certificates      and do not have expiration dates. Emission allowances are charged to fuel      expense as they are used inoperations. |
|--|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |   | Three      Months |   |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------|--------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |   | 2008              |   |   | 2007 |   |
| Ameren(a)                                                                                             |   | $                 | 7      |   |   | $ | 7 |   |
| UE                                                                                                    |   |              | (1     | ) |   |   | (3 | ) |
| Genco                                                                                                 |   |              | 7      |   |   |   | 7 |   |
| CILCORP(b)                                                                                            |   |              | -      |   |   |   | 2 |   |
| CILCO                                                                                                 |   |              | -      |   |   |   | 1 |   |

| (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

| (b)   | Includes      allowances consumed that were recorded through purchase      accounting. |
|-----------------|----------------------------------------------------------------------------------------|

|    |   | Three      Months |   |
|---------|--------|-------------------|--------|
|    |   | 2008              |   |   | 2007 |   |
| Ameren  |   | $                 | 49     |   |   | $ | 42 |   |
| UE      |   |              | 25     |   |   |   | 23 |   |
| CIPS    |   |              | 6      |   |   |   | 5 |   |
| CILCORP |   |              | 5      |   |   |   | 4 |   |
| CILCO   |   |              | 5      |   |   |   | 4 |   |
| IP      |   |              | 13     |   |   |   | 11 |   |

----

----

----

----

| $1.15      Billion Credit Facility                    |   | Ameren      (Parent) |   | UE     |   |   | Genco  |   |   | Total  |   |
|-------------------------------------------------------|--------|----------------------|--------|--------|--------|--------|--------|--------|--------|--------|--------|
| March      31, 2008:                                  |   |                 |   |   |   |   |   |   |   |   |   |   |
| Average      daily borrowings outstanding during 2008 |   | $                    | 530    |   |   | $      | 127    |   |   | $      | 118    |   |   | $ | 775 |   |
| Outstanding      short-term debt at period end        |   |                 | 550    |   |   |   | 208    | (a)    |   |   | 150    |   |   |   | 908 | (a) |
| Weighted-average      interest rate during 2008       |   |                 | 4.41   | %      |   |   | 3.79   | %      |   |   | 4.18   | % |   |   | 4.27 | % |
| Peak      short-term borrowings during 2008           |   | $                    | 675    |   |   | $      | 283    |   |   | $      | 150    |   |   | $ | 983 |   |
| Peak      interest rate during 2008                   |   |                 | 7.25   | %      |   |   | 5.65   | %      |   |   | 5.53   | % |   |   | 7.25 | % |

|  | (a)   | Includes      issuances under a commercial paper program of $58 million at UE supported      by this facility as of March 31,2008. |
|--|-----------------|------------------------------------------------------------------------------------------------------------------------------------|

| 2007      $500 Million Credit Facility                |   | CIPS   |   |   | CILCORP      (Parent) |   |   | CILCO(Parent) |   |   | IP     |   |   | AERG   |   |   | Total  |   |
|-------------------------------------------------------|--------|--------|--------|--------|-----------------------|--------|--------|---------------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|
| March      31, 2008:                                  |   |   |   |   |                  |   |   |          |   |   |   |   |   |   |   |   |   |   |
| Average      daily borrowings outstanding during 2008 |   | $      | -      |   |                  | $      | 125    |          |   | $      | 58     |   |   | $      | 179    |   |   | $      | 82 |   |   | $ | 444 |   |
| Outstanding      short-term debt at period end        |   |   | -      |   |                  |   | 125    |          |   |   | 75     |   |   |   | 150    |   |   |   | 100 |   |   |   | 450 |   |
| Weighted-average      interest rate during 2008       |   |   | -      |   |                  |   | 5.35   | %             |   |   | 5.02   | %      |   |   | 4.99   | %      |   |   | 4.82 | % |   |   | 5.06 | % |
| Peak      short-term borrowings during 2008           |   | $      | -      |   |                  | $      | 125    |          |   | $      | 75     |   |   | $      | 200    |   |   | $      | 100 |   |   | $ | 490 |   |
| Peak      interest rate during 2008                   |   |   | -      |   |                  |   | 6.66   | %             |   |   | 6.47   | %      |   |   | 6.15   | %      |   |   | 6.22 | % |   |   | 6.66 | % |
| 2006      $500 Million Credit Facility                |   |   |   |   |                  |   |   |          |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| March      31, 2008:                                  |   |   |   |   |                  |   |   |          |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Average      daily borrowings outstanding during 2008 |   | $      | 106    |   |                  | $      | 50     |          |   | $      | 18     |   |   | $      | 6      |   |   | $      | 186 |   |   | $ | 366 |   |
| Outstanding      short-term debt at period end        |   |   | 85     |   |                  |   | 50     |          |   |   | -      |   |   |   | -      |   |   |   | 180 |   |   |   | 315 |   |
| Weighted-average      interest rate during 2008       |   |   | 4.91   | %      |                  |   | 5.36   | %             |   |   | 5.29   | %      |   |   | 6.50   | %      |   |   | 4.96 | % |   |   | 5.03 | % |
| Peak      short-term borrowings during 2008           |   | $      | 135    |   |                  | $      | 50     |          |   | $      | 40     |   |   | $      | 100    |   |   | $      | 190 |   |   | $ | 465 |   |
| Peak      interest rate during 2008                   |   |   | 6.31   | %      |                  |   | 7.01   | %             |   |   | 5.98   | %      |   |   | 6.50   | %      |   |   | 7.01 | % |   |   | 7.01 | % |

----

----

----

|   |  Required      Interest Coverage Ratio(a) |  Actual      Interest Coverage      Ratio                                                                                                |  Bonds(b)Issuable   |  Required      Dividend Coverage Ratio(c) | Actual      Dividend      Coverage      Ratio | Preferred      Stock      Issuable |
|--------|------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|--------------------------|------------------------------------------------|-----------------------------------------------|------------------------------------|
| UE     | ≥      2.0                               |                             4.0 | $   2,270 | ≥      2.5                               | 53.3                                          | $        1,725           |
| CIPS   | ≥      2.0                               |                             1.4 | -                        | ≥      1.5                               |        1.1                               | -                                  |
| CILCO  | ≥      2.0(d)                            |                           14.1            | 108                      | ≥      2.5                               | 40.7                                          | 404(e)                             |
| IP     | ≥      2.0                               |                             2.9 | 339                      | ≥      1.5                               |        1.1                               | -                                  |

| (a)   | Coverage      required on the annual interest charges on first mortgage bonds      outstanding and to be issued. Coverage is not required in certain cases      when additional first mortgage bonds are issued on the basis of retired      bonds. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Amount      of bonds issuable based on either meeting required coverage ratios or      unfunded property additions, whichever is more restrictive. In addition to      these tests, UE, CIPS, CILCO and IP have the ability to issue bonds based      upon retired bond capacity of $15 million, $3 million, $175 million      and $664 million, respectively, for which no earnings coverage test      is required. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | Coverage      required on the annual interest charges on all long-term debt (CIPS only)      and the annual dividend on preferred stock outstanding and to be issued,      as required in the respective company’s articles of incorporation. For      CILCO, this ratio must be met for a period of 12 consecutive calendar      months within the 15 months immediately preceding the      issuance. |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (d)   | In      lieu of meeting the interest coverage ratio requirement, CILCO may attempt      to meet an earnings requirement of at least 12% of the principal amount of      all mortgage bonds outstanding and to be issued. For the three months      ended March 31, 2008, CILCO had earnings equivalent to at least 43% of the      principal amount of all mortgage bonds  outstanding. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (e)   | See      Note 3 – Credit Facilities and Liquidity for a discussion regarding a      restriction on the issuance of preferred stock by CILCO under the      2006 $500 million credit facility and the 2007 $500 million credit      facility. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                                                                                           | RequiredInterest      Coverage      Ratio | ActualInterest      Coverage      Ratio | RequiredDebt–to-      Capital      Ratio | ActualDebt–to-      Capital      Ratio |
|----------------------------------------------------------------------------------------------------------------|-------------------------------------------|-----------------------------------------|------------------------------------------------|----------------------------------------------|
| Genco      (a)                 | ≥      1.75(b)                      | 7.1                                     | ≤      60%                               | 37%                                          |
| CILCORP(c)                                                                                                     | ≥      2.2                          | 3.3                                     | ≤      67%                               | 27%                                          |

| (a)   | Interest      coverage ratio relates to covenants regarding certain dividend, principal      and interest payments on certain subordinated intercompany borrowings. The      debt-to-capital ratio relates to a debt incurrence covenant, which      requires an interest coverage ratio of 2.5 for the most recently ended      four fiscal quarters. |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Ratio      excludes amounts payable under Genco’s intercompany note to CIPS and must      be met for both the prior four fiscal quarters and for the succeeding four      six-month periods. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | CILCORP      must maintain the required interest coverage ratio and debt-to-capital      ratio in order to make any payment of dividends or intercompany loans to      affiliates other than to its direct or indirect    subsidiaries. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |   | Three      Months |   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------|--------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |   | 2008              |   |   | 2007 |   |
| Ameren:(a)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |
| Interest and dividend      income                                                                                                                   |   | $                 | 12     |   |   | $ | 14 |   |
| Allowance for equity funds used      during      construction                                                                                       |   |              | 6      |   |   |   | - |   |
| Other                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              | 3      |   |   |   | 2 |   |
| Total miscellaneous      income                                                                                                                                                             |   | $                 | 21     |   |   | $ | 16 |   |
| Miscellaneous      expense:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   |              |   |   |   |   |   |   |
| Other                                                                                                                                               |   | $                 | (4     | ) |   | $ | (5 | ) |
| Total miscellaneous      expense                                                                                                                                                            |   | $                 | (4     | ) |   | $ | (5 | ) |
| UE:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |   |              |   |   |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |   |   |
| Interest and dividend      income                                                                                                                   |   | $                 | 8      |   |   | $ | 10 |   |
| Allowance for equity funds used      during construction                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |   |              | 6      |   |   |   | - |   |
| Total miscellaneous      income                                                                                                                                                             |   | $                 | 14     |   |   | $ | 10 |   |
| Miscellaneous      expense:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   |              |   |   |   |   |   |   |
| Other                                                                                                                                               |   | $                 | (2     | ) |   | $ | (2 | ) |
| Total miscellaneous      expense                                                                                                                                                            |   | $                 | (2     | ) |   | $ | (2 | ) |
| CIPS:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |   |              |   |   |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |   |   |
| Interest and dividend      income                                                                                                                   |   | $                 | 3      |   |   | $ | 3 |   |
| Total miscellaneous      income                                                                                                                                                             |   | $                 | 3      |   |   | $ | 3 |   |
| Genco:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |   |              |   |   |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |   |   |
| Other                                                                                                                                               |   | $                 | 2      |   |   | $ | - |   |
| Total miscellaneous      income                                                                                                                                                             |   | $                 | 2      |   |   | $ | - |   |
| CILCORP:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |   |              |   |   |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |   |   |
| Interest income                                                                                                                                |   | $                 | -      |   |   | $ | 2 |   |
| Total miscellaneous      income                                                                                                                                                             |   | $                 | -      |   |   | $ | 2 |   |
| Miscellaneous      expense:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   |              |   |   |   |   |   |   |
| Other                                                                                                                                               |   | $                 | -      |   |   | $ | (1 | ) |
| Total miscellaneous      expense                                                                                                                                                            |   | $                 | -      |   |   | $ | (1 | ) |
| CILCO:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |   |              |   |   |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |   |              |   |   |   |   |   |   |
| Interest income                                                                                                                                |   | $                 | -      |   |   | $ | 1 |   |
| Total miscellaneous      income                                                                                                                                                             |   | $                 | -      |   |   | $ | 1 |   |
| Miscellaneous      expense:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |   |              |   |   |   |   |   |   |
| Other                                                                                                                                               |   | $                 | -      |   |   | $ | (1 | ) |
| Total miscellaneous      expense                                                                                                                                                            |   | $                 | -      |   |   | $ | (1 | ) |

----

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |   | Three      Months |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------|--------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |   | 2008              |   |   | 2007 |   |
| IP:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |   |              |   |   |   |   |   |   |
| Miscellaneous      income:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |   |              |   |   |   |   |   |   |
| Interest income                                                                                       |   | $                 | 2      |   |   | $ | 1 |   |
| Other                                                                                                      |   |              | 1      |   |   |   | 1 |   |
| Total miscellaneous      income                                                                                                                    |   | $                 | 3      |   |   | $ | 2 |   |
| Miscellaneous      expense:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |   |              |   |   |   |   |   |   |
| Other                                                                                                      |   | $                 | (1     | ) |   | $ | (1 | ) |
| Total miscellaneous      expense                                                                                                                   |   | $                 | (1     | ) |   | $ | (1 | ) |

| (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |   | Three      Months |   |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------------|--------|
| Gains      (Losses)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |   | 2008              |   |   | 2007 |   |
| Ameren                                                                                           |   | $                 | (8     | ) |   | $ | 4 |   |
| UE                                                                                               |   |              | (1     | ) |   |   | 2 |   |

|                                                     | Ameren(a) |   |   | UE     |   |   | CIPS   |   |   | Genco  |   |   | CILCORP/CILCO |   |   | IP     |   |
|----------------------------------------------------------|-----------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|---------------|--------|--------|--------|--------|
| Derivative      instruments carrying value:              |      |   |   |   |   |   |   |   |   |   |   |   |          |   |   |   |   |
| Other current    assets                                  | $         | 129    |   |   | $      | 46     |   |   | $      | 18     |   |   | $             | 2      |   |   | $      | 18 |   |   | $ | 35 |   |
| Other assets                                             |      | 35     |   |   |   | 3      |   |   |   | 42     |   |   |          | -      |   |   |   | 23 |   |   |   | 69 |   |
| Other current      liabilities                           |      | 140    |   |   |   | 50     |   |   |   | 1      |   |   |          | 16     |   |   |   | 1 |   |   |   | 1 |   |
| Other deferred credits and      liabilities              |      | 11     |   |   |   | -      |   |   |   | 1      |   |   |          | -      |   |   |   | - |   |   |   | 1 |   |
| Gains      (losses) deferred in Accumulated OCI:         |      |   |   |   |   |   |   |   |   |   |   |   |          |   |   |   |   |   |   |   |   |   |   |
| Power forwards(b)                                        |      | (71    | )      |   |   | (16    | )      |   |   | -      |   |   |          | -      |   |   |   | - |   |   |   | - |   |
| Interest rate swaps(c)(d)                           |      | (13    | )      |   |   | -      |   |   |   | -      |   |   |          | (13    | )      |   |   | - |   |   |   | - |   |
| Gas swaps and futures      contracts(e)                  |      | 3      |   |   |   | 1      |   |   |   | -      |   |   |          | -      |   |   |   | - |   |   |   | - |   |
| SO2      futures contracts                               |      | -      |   |   |   | -      |   |   |   | -      |   |   |          | -      |   |   |   | - |   |   |   | - |   |
| Coal options                                             |      | 4      |   |   |   | 4      |   |   |   | -      |   |   |          | -      |   |   |   | - |   |   |   | - |   |
| Gains      deferred in regulatory assets or liabilities: |      |   |   |   |   |   |   |   |   |   |   |   |          |   |   |   |   |   |   |   |   |   |   |
| Gas      swaps and futures contracts(e)                  |      | 74     |   |   |   | 8      |   |   |   | 12     |   |   |          | -      |   |   |   | 19 |   |   |   | 35 |   |
| Financial      contracts(f)                              |      | -      |   |   |   | -      |   |   |   | 46     |   |   |          | -      |   |   |   | 23 |   |   |   | 66 |   |

| (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

| (b)   | Represents      the mark-to-market value for the hedged portion of electricity price      exposure for periods of up to three years, including losses of $67 million      over the next 12 months. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | Includes      a gain associated with interest rate swaps at Genco that were a partial      hedge of the interest rate on debt issued in June 2002. The swaps cover      the first 10 years of debt that has a 30-year maturity and the gain in OCI      is amortized over a 10-year period that began in June 2002. The carrying      value at March 31, 2008, was $2million. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (d)   | Includes      a loss associated with interest rate swaps at Genco. The swaps were      executed during the fourth quarter of 2007 as a partial hedge of interest      rate risks associated with future debt issuances. The cumulative loss on      the interest rate swaps will be amortized over a 10-year period that began      in April 2008. The carrying value at March 31, 2008 was a loss of $15      million. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (e)   | Represents      gains associated with natural gas swaps and futures contracts. The swaps      and futures contracts are a partial hedge of our natural gas requirements      through October 2011. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (f)   | Current      amounts of $8 million at CIPS, $4 million at CILCO, and $11 million at IP      were recorded in other current assets and other current liabilities at      March 31, 2008. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                                    | Three      Months |   |
|-----------------------------------------|-------------------|--------|
| Gains      (Losses)                     | 2008              |   |   | 2007 |   |
| SO2      options and swaps:             |              |   |   |   |   |
| Ameren                                  | $                 | (1     | ) |   | $ | 4 |   |
| UE                                      |              | -      |   |   |   | 4 |   |
| Coal      options:                      |              |   |   |   |   |   |   |
| Ameren                                  |              | -      |   |   |   | 1 |   |
| UE                                      |              | -      |   |   |   | 1 |   |
| Heating      oil options:               |              |   |   |   |   |   |   |
| Ameren                                  |              | 19     |   |   |   | 3 |   |
| UE                                      |              | 10     |   |   |   | - |   |
| Genco                                   |              | 5      |   |   |   | - |   |
| CILCORP/CILCO                           |              | 1      |   |   |   | - |   |
| Nonhedge      power swaps and forwards: |              |   |   |   |   |   |   |
| Ameren                                  |              | 5      |   |   |   | - |   |
| UE                                      |              | 2      |   |   |   | - |   |
| Nonhedge      gas forwards:             |              |   |   |   |   |   |   |
| Ameren                                  |              | (5     | ) |   |   | - |   |
| UE                                      |              | (1     | )  |   |   | - |   |
| FTRs:                                   |              |   |   |   |   |   |   |
| Ameren                                  |              | 5      |   |   |   | - |   |
| UE                                      |              | 2      |   |   |   | - |   |

----

|          |                                                                                                                                                                                              | Quoted      Prices inActive      Markets for Identified Assets(Level      1) |   | Significant      Other Observable Inputs(Level      2) |   | Significant      Other Unobservable      Inputs(Level      3) |   |   Total |   |
|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------|--------|--------------------------------------------------------|--------|---------------------------------------------------------------|--------|-------------------|--------|
| Assets:       |                                                                                                                                                                                              |                                                                         |   |                                                   |   |                                                          |   |              |   |   |   |   |
| Ameren(a)     | Derivative      assets(b)                             | $                                                                            | 2      |                                                   |   | $                                                             | 45     |              |   | $ | 117 |   |   | $ | 164 |   |
|          | Nuclear      Decommissioning                                                                                                                                                                      |                                                                         |   |                                                   |   |                                                          |   |              |   |   |   |   |   |   |   |   |
|          | Trust      Fund                                                                                                                                                                                   |                                                                         | 233    |                                                   |   |                                                          | 56     |              |   |   | 2 |   |   |   | 291 |   |
| UE            | Derivative      assets                                                                                                                                                                            |                                                                         | -      |                                                   |   |                                                          | 29     |              |   |   | 20 |   |   |   | 49 |   |
|          | Nuclear      Decommissioning                                                                                                                                                                      |                                                                         |   |                                                   |   |                                                          |   |              |   |   |   |   |   |   |   |   |
|          | Trust      Fund231                                                                                                                                                                                |                                                                         | 233    |                                                   |   |                                                          | 56     |              |   |   | 2 |   |   |   | 291 |   |
| CIPS          | Derivative      assets(b)                                                                                                                                                                         |                                                                         | -      |                                                   |   |                                                          | -      |              |   |   | 60 |   |   |   | 60 |   |
| Genco         | Derivative      assets(b)                                                                                                                                                                         |                                                                         | -      |                                                   |   |                                                          | -      |              |   |   | 2 |   |   |   | 2 |   |
| CILCORP/CILCO | Derivative      assets(b)                                                                                                                                                                         | (c)                                                                          |   |                                                   |   | -                                                             |   |              |   | 41 |   |   |   | 41 |   |
| IP            | Derivative      assets(b)                                                                                                                                                                         |                                                                         | -      |                                                   |   |                                                          | -      |              |   |   | 104 |   |   |   | 104 |   |
| Liabilities:  |                                                                                                                                                                                              |                                                                         |   |                                                   |   |                                                          |   |              |   |   |   |   |   |   |   |   |
| Ameren(a)     | Derivative      liabilities(b)                                                                                                                                                                    | $                                                                            | 19     |                                                   |   | $                                                             | 74     |              |   | $ | 58 |   |   | $ | 151 |   |
| UE            | Derivative      liabilities(b)                                                                                                                                                                    |                                                                         | 1      |                                                   |   |                                                          | 44     |              |   |   | 5 |   |   |   | 50 |   |
| CIPS          | Derivative      liabilities(b)                                                                                                                                                                    |                                                                         | -      |                                                   |   |                                                          | -      |              |   |   | 2 |   |   |   | 2 |   |
| Genco         | Derivative      liabilities(b)                                                                                                                                                                    |                                                                         | 15     |                                                   |   |                                                          | -      |              |   |   | 1 |   |   |   | 16 |   |
| CILCORP/CILCO | Derivative      liabilities(b)                                                                                                                                                                    |                                                                         | -      |                                                   |   |                                                          | -      |              |   |   | 1 |   |   |   | 1 |   |
| IP            | Derivative      liabilities(b)                                                                                                                                                                    |                                                                         | -      |                                                   |   |                                                          | -      |              |   |   | 2 |   |   |   | 2 |   |

| (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

| (b)   | The      derivative asset and liability balances are presented net of counterparty      credit considerations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

| (c)   | Less      than $1 million. |
|-----------------|----------------------------|

|                |                                                                                                         |   |            |                                        |             |     |        |       |                   |   |       |   |           |                | Change      in    |
|---------------------|--------------------------------------------------------------------------------------------------------------|--------|-----------------|---------------------------------------------|------------------|----------|-------------|------------|------------------------|--------|------------|--------|----------------|---------------------|-------------------|
|                |                                                                                                         |   |            |                                        |             |     | Total       |       |                   |   |       |   |           |                | Unrealized        |
|                |                                                                                                         |   |            | Realized and Unrealized Gains      (Losses) |             | Realized |        | Purchases, |                   |   |       |   |           | Gains      (Losses) |
|                |                                                                                                         |   | Beginning       |                                        |             |     |        |       |  Included      in |   | and        |   | Issuances,     |                | Net               |   | Ending |   | related      to |
|                |                                                                                                         |   | Balance      at |                                        |             |     |        |       |  Regulatory       |   | Unrealized |   | and      Other |                | Transfers      In |   | Balance      at |   | assets/liabilities |
|                |                                                                                                         |   | January      1, |                                        | Included      in |     | Included    |       |  Assets/          |   | Gains      |   | Settlements,   |                | and/or      (Out) |   | March      31, |   | still      held at |
|                |                                                                                                         |   | 2008            |                                        | Earnings(a)      |     | In      OCI |       |  Liabilities      |   | (Losses)   |   | Net            |                | of      Level 3   |   | 2008 |   | March      31, 2008 |
| Net      Derivative | Ameren                  |   | $               | 19                                          |             |     | $           | 6          |                   |   | $          | (34    | )              |                | $                 | 69 |   |   | $ | 41 |   |   | $ | 10 |   |   | $ | (11 | ) |   | $ | 59 |   |   | $ | 18 |   |
| Contracts           | UE                      |   |            | 3                                           |             |     |        | 2          |                   |   |       | 7      |           |                |              | 7 |   |   |   | 16 |   |   |   | (5 | ) |   |   | 1 |   |   |   | 15 |   |   |   | 11 |   |
|                | CIPS                    |   |            | 38                                          |             |     |        | -          |                   |   |       | -      |           |                |              | 19 |   |   |   | 19 |   |   |   | 1 |   |   |   | - |   |   |   | 58 |   |   |   | 12 |   |
|                | Genco                   |   |            | 1                                           |             |     | (b)         |       |                   | (b)    |       |   |           | -                   |              |   | (b) |   |   | (b) |   |   |   | - |   |   |   | 1 |   |   | (b) |   |
|                | CILCORP/CILCO                                                                                                |   |            | 21                                          |             |     | (b)         |       |                   | (b)    |       |   |           | 20                  |              |   |   | 20 |   |   |   | (1 | ) |   |   | - |   |   |   | 40 |   |   |   | 15 |   |
|                | IP                      |   |            | 55                                          |             |     |        | -          |                   |   |       | -      |           |                |              | 43 |   |   |   | 43 |   |   |   | 4 |   |   |   | - |   |   |   | 102 |   |   |   | 31 |   |
| Nuclear             | Ameren                  |   | $               | 5                                           |             |     | $           | -          |                   |   | $          | -      |           |                | $                 | - |   |   | $ | - |   |   | $ | (3 | ) |   | $ | - |   |   | $ | 2 |   |   | $ | - |   |
| Decommissioning     | UE                      |   |            | 5                                           |             |     |        | -          |                   |   |       | -      |           |                |              | - |   |   |   | - |   |   |   | (3 | ) |   |   | - |   |   |   | 2 |   |   |   | - |   |
| Trust      Fund     |                                                                                                         |   |            |                                        |             |     |        |       |                   |   |       |   |           |                |              |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |

| (a)   | Net      gains and losses on power options are recorded in Operating Revenues –      Electric, while net gains and losses on coal, heating oil, and SO2      options and swaps are recorded as Operating Expenses –    Fuel. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Less      than $1 million. |
|-----------------|----------------------------|

----

|                                       | Three      Months |   |
|--------------------------------------------|-------------------|--------|
|                                       | 2008              |   |   | 2007 |   |
| Genco      sales to Marketing Company |              | 4,412  |   |   |   | 4,119 |   |
| AERG      sales to Marketing Company  |              | 1,702  |   |   |   | 1,488 |   |
| Marketing      Company sales to CIPS  |              | 623    |   |   |   | 619 |   |
| Marketing      Company sales to CILCO |              | 257    |   |   |   | 288 |   |
| Marketing      Company sales to IP    |              | 804    |   |   |   | 826 |   |

----

|                                        |   | Three      Months                                                                                                                  |
|---------------------------------------------|--------|------------------------------------------------------------------------------------------------------------------------------------|
| Agreement                                   |   | UE                                                                                                                                 | CIPS | Genco | CILCORP(a) | IP |
|                                        |   |                                                                                                                               |   |   |   |   |
| Operating      Revenues:                    |   |                                                                                                                               |   |   |   |   |
| Genco      and AERG power supply            | 2008   | $                          (b) |          $                          (b) | $                           226 |        $                        83 |        $                        (b) |
| agreements      with Marketing Company      | 2007   | (b)                                                                                                                                | (b) | 211 | 72 | (b) |
|                                        |   |                                                                                                                               |   |   |   |   |
| Ancillary      service agreement with CIPS, | 2008   | 3                                                                                                                                  | (b) | (b) | (b) | (b) |
| CILCO      and IP                           | 2007   | 4                                                                                                                                  | (b) | (b) | (b) | (b) |
|                                        |   |                                                                                                                               |   |   |   |   |
| UE      and Genco gas transportation        | 2008   | (c)                                                                                                                                | (b) | (b) | (b) | (b) |
| agreement                                   | 2007   | (c)                                                                                                                                | (b) | (b) | (b) | (b) |

----

----

|                                      |   | Three      Months                                                                                                                                              |
|-------------------------------------------|--------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Agreement                                 |   | UE                                                                                                                                                             | CIPS | Genco | CILCORP(a) | IP |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Total Operating      Revenues             | 2008   | $                       3                   | $                     (b) |        $                           226 | $                        83 | $                        (b) |
|                                      | 2007   | 4                                                                                                                                                              | (b) | 211 | 72 | (b) |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Fuel      and Purchased Power:            |   |                                                                                                                                                           |   |   |   |   |
| CIPS,      CILCO and IP agreements with   | 2008   | $                     (b)                             | $                     41 | $                         (b) | $                        17 | $                             53 |
| Marketing      Company (2006 auction)     | 2007   | (b)                                                                                                                                                            | 42 | (b) | 19 | 55 |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Ancillary      service agreement with UE  | 2008   | (b)                                                                                                                                                            | 1 | (b) | (c) | 1 |
|                                      | 2007   | (b)                                                                                                                                                            | 1 | (b) | 1 | 2 |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Ancillary      service agreement with     | 2008   | (b)                                                                                                                                                            | 2 | (b) | 1 | 3 |
| Marketing      Company                    | 2007   | (b)                                                                                                                                                            | 1 | (b) | (c) | 1 |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Executory      tolling agreement with     | 2008   | (b)                                                                                                                                                            | (b) | (b) | 13 | (b) |
| Medina      Valley                        | 2007   | (b)                                                                                                                                                            | (b) | (b) | 12 | (b) |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| UE      and Genco gas transportation      | 2008   | (b)                                                                                                                                                            | (b) | (c) | (b) | (b) |
| agreement                                 | 2007   | (b)                                                                                                                                                            | (b) | (c) | (b) | (b) |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Total Fuel and Purchased      Power       | 2008   |          $                     (b)     | $                     44 | $                          (c) | $                        31 | $                        57 |
|                                      | 2007   | (b)                                                                                                                                                            | 44 | (c) | 32 | 58 |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Other      Operating Expense:             |   |                                                                                                                                                           |   |   |   |   |
| Ameren      Services support services     | 2008   |        $                     33                  | $                     12 | $                             7 | $                            12 | $                        18 |
| agreement                                 | 2007   | 36                                                                                                                                                             | 12 | 6 | 13 | 19 |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Ameren      Energy, Inc. support services | 2008   | (e)                                                                                                                                                            | (b) | (e) | (b) | (b) |
| agreement                                 | 2007   | 3                                                                                                                                                              | (b) | (c) | (b) | (b) |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| AFS      support services agreement       | 2008   | 2                                                                                                                                                              | (c) | 1 | (c) | (c) |
|                                      | 2007   | 2                                                                                                                                                              | (c) | 1 | 1 | (c) |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Insurance      premiums(d)                | 2008   | 9                                                                                                                                                              | (b) | 4 | 4 | (b) |
|                                      | 2007   | 4                                                                                                                                                              | (b) | 1 | (c) | (b) |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Total Other Operating      Expenses       | 2008   | $                    44                                    |        $                     12 | $                               12 | $                        16 | $                        18 |
|                                      | 2007   | 45                                                                                                                                                             | 12 | 8 | 14 | 19 |
|                                      |   |                                                                                                                                                           |   |   |   |   |
| Interest      expense (income) from       | 2008   |         $                            - |  $                     (c) | $                                 2 | $                        (c) | $                        (c) |
| money      pool borrowings (advances)     | 2007   | -                                                                                                                                                              | (c) | 2 | (c) | (c) |

| (a)         | Amounts      represent CILCORP and CILCOactivity. |
|-----------------------|---------------------------------------------------|

| (b)         | Not      applicable.                                                                                                              |
|-----------------------|-----------------------------------------------------------------------------------------------------------------------------------|
| (c)    | Amount      less than $1 million.                                                                                       |
| (d)                   | Represents      insurance premiums paid to an affiliate for replacement power, property      damage and terrorism coverage.  |
| (e)                   | Ameren      Energy, Inc. was eliminated December 31, 2007 through an internal      reorganization.                           |

----

| Type      and Source of Coverage                    | Maximum      Coverages                                                                                                                                                                                                   | Maximum      Assessments for Single Incidents                                                                                                                                                                                          |
|-----------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Public      liability and nuclear worker liability: |                                                                                                                                                                                                                     |                                                                                                                                                                                                                                   |
| American Nuclear      Insurers                      | $                                      300(a)            | $                                      - |
| Pool participation                                  |                      10,461                                                                                     |                                    101(b)                                             |
|                                                | $                            10,761(c)                                       | $                                  101                       |
| Property      damage:                               |                                                                                                                                                                                                                     |                                                                                                                                                                                                                                   |
| Nuclear Electric Insurance      Ltd                 | $                                   2,750(d)                            | $                                         24            |
| Replacement      power:                             |                                                                                                                                                                                                                     |                                                                                                                                                                                                                                   |
| Nuclear Electric Insurance      Ltd                 | $                                      490(e)            | $                                      9 |
| Energy Risk Assurance      Company                  | $                                        64(f) | $                                      - |

| (a)   | Provided      through mandatory participation in an industry-wide retrospective premium      assessment program. |
|-----------------|------------------------------------------------------------------------------------------------------------------|

| (b)   | Retrospective      premium under the Price-Anderson liability provisions of the Atomic Energy      Act of 1954, as amended. This is subject to retrospective assessment      with respect to a covered loss in excess of $300 million from an incident      at any licensed U.S. commercial reactor, payable at $15 million per year. |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | Limit      of liability for each incident under Price-Anderson. This limit is subject      to change to account for the effects of inflation and changes in the      number of licensed reactors. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (d)   | Provides      for $500 million in property damage and decontamination, excess property      insurance, and premature decommissioning coverage up to $2.25 billion      for losses in excess of the $500 million primary  coverage. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (e)   | Provides      the replacement power cost insurance in the event of a prolonged      accidental outage at a nuclear plant. Weekly indemnity of $4.5 million for       52 weeks, which commences after the first eight weeks of an outage,      plus $3.6 million per week for 71.1 weeks  thereafter. |
|-----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (f)   | Provides      the replacement power cost insurance in the event of a prolonged      accidental outage at a nuclear plant. The coverage commences after the      first 52 weeks of insurance coverage from Nuclear Electric Insurance Ltd.      and is for a weekly indemnity of $900,000 for 71 weeks in excess of the      $3.6 million per week set forth above. Energy Risk Assurance Company is an      affiliate and has reinsured this coverage with third-party insurance      companies. See Note 8 – Related Party Transactions for more information on      this affiliate transaction. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|    |   |  Ameren |   |   | CIPS   |   |   | CILCO(IllinoisRegulated) |   |   | IP  |   |   | Genco  |   |   | CILCO(AERG) |   |
|---------|--------|--------------|--------|--------|--------|--------|--------|--------------------------|--------|--------|-----|--------|--------|--------|--------|--------|-------------|--------|
| 2008(a) |   | $            | 31.9   |   |   | $      | 4.7    |                     |   | $      | 2.3 |   |   | $      | 6.4    |   |        | $      | 12.8 |   |   | $ | 5.7 |   |
| 2009(a) |   |         | 26.5   |   |   |   | 3.9    |                     |   |   | 1.9 |   |   |   | 4.9    |   |        |   | 10.9 |   |   |   | 4.9 |   |
| 2010(a) |   |         | 1.7    |   |   |   | 0.2    |                     |   |   | 0.1 |   |   |   | 0.4    |   |        |   | 0.7 |   |   |   | 0.3 |   |
| Total   |   | $            | 60.1   |   |   | $      | 8.8    |                     |   | $      | 4.3 |   |   | $      | 11.7   |   |        | $      | 24.4 |   |   | $ | 10.9 |   |

----

----

|   | 2008                         | 2009      – 2012                                                                                                                                                                                    | 2013      - 2017                                                                                                                                                                                                                        | Total                                                                                                                                                                                                          |
|--------|------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| UE(a)  |  $        255 | $         215-  $    295                                                                                                                                                    | $      1,300-  $ 1,700                                                                                                                                                                                                             | $       1,770-  $ 2,250                                                                                                                                                                         |
| Genco  |   300              | 955-          1,210                                                                                                                                                                        | 45-               70                                                                                                                                                                            | 1,300-     1,580                                                                                                                                                                      |
| CILCO  |   170              |                                380-        500 |                                  70-             90 |        620-        760                                                                                                                                            |
| EEI    |          30   |                              260-        350        |                                  20-             30 |        310-        410                                                                                                                                                 |
| Ameren |  $        755      |                          $ 1,810-  $ 2,355                                                       | $ 1,435-       $ 1,890                                                                                                                                                                                                        |                                  $   4,000- $ 5,000 |

| (a)   | UE’s      expenditures are expected to be recoverable in rates over      time. |
|-----------------|--------------------------------------------------------------------------------------|

|                                                                                                                                                     | SO2(a) |   |   | NOx(b) |   |   | Book      Value |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------|--------|--------|--------|--------|-----------------|--------|
| Ameren                                                                                                                                                   |   | 3.191  |   |   |   | 33,240 |            |   | $ | 189 | (c) |
| UE                          |   | 1.757  |   |   |   | 15,818 |            |   |   | 54 |   |
| Genco                                                                                                                                                    |   | 0.745  |   |   |   | 11,891 |            |   |   | 58 |   |
| CILCORP                                                                                                                                                  |   | 0.351  |   |   |   | 2,147  |            |   |   | 40 |   |
| CILCO      (AERG)                                                                                                                                        |   | 0.351  |   |   |   | 2,147  |            |   |   | 1 |   |
| EEI                                                                                                                                                      |   | 0.338  |   |   |   | 3,384  |            |   |   | 9 |   |

| (a)   | Vintages      are from 2008 to 2018. Each company possesses additional allowances for      use in periods beyond 2018. Units are in millions of SO2      allowances (currently one allowance equals one ton    emitted). |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Vintages      are from 2008 to 2009. Units are in NOx      allowances (one allowance equals one ton  emitted). |
|-----------------|----------------------------------------------------------------------------------------------------------------|

| (c)   | Includes      value assigned to EEI allowances as a result of purchase accounting of $27      million. |
|-----------------|--------------------------------------------------------------------------------------------------------|

----

----

----

----

----

|      |           | Specifically      Named as Defendant                                                                                            |
|-----------|----------------|---------------------------------------------------------------------------------------------------------------------------------|
|      | Total(a)       | Ameren                                                                                                                          | UE | CIPS | Genco | CILCO | IP |
| Filed     | 357            |                         32            | 198 | 151 | 2 | 50 | 172 |
| Settled   | 126            |                      - |        67 |        56 | - | 19 |        64 |
| Dismissed | 160            |                         29            | 105 |        58 | 2 | 17 |        78 |
| Pending   |        71 |                           3 |        26 |        37 | - | 14 |        30 |

|  | (a)    | Totals      do not equal to the sum of the subsidiary unit lawsuits because some of      the lawsuits name multiple Ameren entities as  defendants. |
|--|-----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | Three      Months |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------|--------|
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     | 2008              |   |   | 2007 |   |
| Ameren:(a)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |              |   |   |   |   |
| Net      income                                                                                                                 | $                 | 138    |   |   | $ | 123 |   |
| Unrealized      net (loss) on derivative hedging instruments, net of taxes (benefit) of      $(36) and $(15), respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |              | (63    | ) |   |   | (28 | ) |
| Reclassification      adjustments for derivative (gain) loss included in net income, net of      taxes (benefit) of $(3) and $7, respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |              | 6      |   |   |   | (13 | ) |
| Adjustment      to pension and benefit obligation, net of taxes (benefit) of $(2) and      $(1), respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |              | 2      |   |   |   | 2 |   |
| Total comprehensive income, net      of      taxes                                                                                                  | $                 | 83     |   |   | $ | 84 |   |
| UE:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |              |   |   |   |   |   |   |
| Net      income                                                                                                                 | $                 | 64     |   |   | $ | 33 |   |
| Unrealized      net (loss) on derivative hedging instruments, net of taxes (benefit) of      $(7) and $(3), respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |              | (11    | ) |   |   | (5 | ) |
| Reclassification      adjustments for derivative (gain) loss included in net income, net of      taxes (benefit) of $(1) and $2, respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |              | 1      |   |   |   | (3 | ) |
| Total comprehensive income, net      of taxes                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | $                 | 54     |   |   | $ | 25 |   |
| CIPS:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |              |   |   |   |   |   |   |
| Net      income                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | $                 | 3      |   |   | $ | 12 |   |
| Unrealized      net gain on derivative hedging instruments, net of taxes of $- and $-,      respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |              | -      |   |   |   | 1 |   |
| Total comprehensive income, net      of      taxes                                                                                                       | $                 | 3      |   |   | $ | 13 |   |
| Genco:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |              |   |   |   |   |   |   |
| Net      income                                                                                                                 | $                 | 46     |   |   | $ | 43 |   |
| Unrealized      net (loss) on derivative hedging instruments, net of taxes (benefit) of      $(4) and $(1), respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |              | (6     | ) |   |   | (2 | ) |
| Adjustment      to pension and benefit obligation, net of taxes (benefit) of $(2) and $-,      respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |              | 3      |   |   |   | 1 |   |
| Total      comprehensive income, net of taxes                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | $                 | 43     |   |   | $ | 42 |   |
| CILCORP:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |              |   |   |   |   |   |   |
| Net      income                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | $                 | 20     |   |   | $ | 21 |   |
| Unrealized      net gain on derivative hedging instruments, net of taxes of $- and $2,      respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |              | -      |   |   |   | 3 |   |
| Reclassification      adjustments for derivative (gain) included in net income, net of taxes of      $1 and $2, respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |              | (1     | ) |   |   | (3 | ) |
| Adjustment      to pension and benefit obligation, net of taxes (benefit) of $(1) and $-,      respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |              | -      |   |   |   | 1 |   |
| Total comprehensive income, net      of      taxes                                                                                                       | $                 | 19     |   |   | $ | 22 |   |
| CILCO:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |              |   |   |   |   |   |   |
| Net      income                                                                                                                 | $                 | 26     |   |   | $ | 27 |   |
| Unrealized      net gain on derivative hedging instruments, net of taxes of $- and $2,      respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |              | -      |   |   |   | 3 |   |
| Reclassification      adjustments for derivative (gain) included in net income, net of taxes of      $- and $2, respectively                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |              | -      |   |   |   | (3 | ) |
| Total      comprehensive income, net of taxes                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | $                 | 26     |   |   | $ | 27 |   |
| IP:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |              |   |   |   |   |   |   |
| Net      income                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          | $                 | 3      |   |   | $ | 15 |   |
| Total comprehensive income, net      of      taxes                                                                                                       | $                 | 3      |   |   | $ | 15 |   |

|  | (a)    | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|--|-----------------------|----------------------------------------------------------------------------------------------------------------|

----

|                                    |   | Pension      Benefits(a) |   |   | Postretirement      Benefits(a) |   |
|-----------------------------------------|--------|--------------------------|--------|--------|---------------------------------|--------|
|                                    |   | Three      Months        |   |   | Three      Months               |   |
|                                    |   | 2008                     |   |   | 2007                            |   |   | 2008 |   |   | 2007 |   |
| Service      cost                  |   | $                        | 15     |   |                            | $      | 16 |   |   | $ | 5 |   |   | $ | 6 |   |
| Interest      cost                 |   |                     | 47     |   |                            |   | 45 |   |   |   | 19 |   |   |   | 19 |   |
| Expected      return on plan assets     |   |                     | (53    | )      |                            |   | (52 | ) |   |   | (14 | ) |   |   | (13 | ) |
| Amortization      of:                   |   |                     |   |   |                            |   |   |   |   |   |   |   |   |   |   |   |
| Transition      obligation              |   |                     | -      |   |                            |   | - |   |   |   | - |   |   |   | - |   |
| Prior service cost      (benefit)  |   |                     | 3      |   |                            |   | 3 |   |   |   | (2 | ) |   |   | (2 | ) |
| Actuarial      loss                |   |                     | 1      |   |                            |   | 6 |   |   |   | 4 |   |   |   | 7 |   |
| Net      periodic benefit cost          |   | $                        | 13     |   |                            | $      | 18 |   |   | $ | 12 |   |   | $ | 17 |   |

| (a)         | Includes      amounts for Ameren registrant and nonregistrant    subsidiaries. |
|-----------------------|--------------------------------------------------------------------------------|

|      |   | Pension      Costs |   |   | Postretirement      Costs |   |
|-----------|--------|--------------------|--------|--------|---------------------------|--------|
|      |   | Three      Months  |   |   | Three      Months         |   |
|      |   | 2008               |   |   | 2007                      |   |   | 2008 |   |   | 2007 |   |
| Ameren(a) |   | $                  | 13     |   |                      | $      | 18 |   |   | $ | 12 |   |   | $ | 17 |   |
| UE        |   |               | 9      |   |                      |   | 10 |   |   |   | 6 |   |   |   | 9 |   |
| CIPS      |   |               | 2      |   |                      |   | 2 |   |   |   | 1 |   |   |   | 2 |   |
| Genco     |   |               | 1      |   |                      |   | 1 |   |   |   | 1 |   |   |   | 1 |   |
| CILCORP   |   |               | -      |   |                      |   | 3 |   |   |   | 1 |   |   |   | 2 |   |
| IP        |   |               | 1      |   |                      |   | 2 |   |   |   | 3 |   |   |   | 3 |   |

|  | (a)         | Includes      amounts for Ameren registrant and nonregistrant    subsidiaries. |
|--|-----------------------|--------------------------------------------------------------------------------|

----

|   Three      Months                                                                                                                                                                                                                                                          | Missouri      Regulated |   |   | Illinois      Regulated |   |   | Non-rate-regulated      Generation |   |   | Other  |   |   | Intersegment      Eliminations |   |   | Consolidated |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|--------|--------|-------------------------|--------|--------|------------------------------------|--------|--------|--------|--------|--------|--------------------------------|--------|--------|--------------|--------|
| 2008:                                                                                                                                                                                                                                                                                  |                    |   |   |                    |   |   |                               |   |   |   |   |   |                           |   |   |         |   |
| External      revenues                                               | $                       | 715    |   |                    | $      | 1,046  |                               |   | $      | 316    |   |   | $                              | 2      |   |         | $      | - |   |   | $ | 2,079 |   |
| Intersegment      revenues                                           |                    | 9      |   |                    |   | 11     |                               |   |   | 132    |   |   |                           | 4      |   |         |   | (156 | ) |   |   | - |   |
| Net      income (loss)(a)                                            |                    | 52     |   |                    |   | 16     |                               |   |   | 78     |   |   |                           | (8     | )      |         |   | - |   |   |   | 138 |   |
| 2007:                                                                                                                                                                                                                                                                                  |                    |   |   |                    |   |   |                               |   |   |   |   |   |                           |   |   |         |   |   |   |   |   |   |   |
| External      revenues                                               | $                       | 638    |   |                    | $      | 1,059  |                               |   | $      | 318    |   |   | $                              | 9      |   |         | $      | - |   |   | $ | 2,024 |   |
| Intersegment      revenues                                           |                    | 12     |   |                    |   | 7      |                               |   |   | 133    |   |   |                           | 10     |   |         |   | (162 | ) |   |   | - |   |
| Net      income(a)                                                   |                    | 18     |   |                    |   | 33     |                               |   |   | 70     |   |   |                           | 2      |   |         |   | - |   |   |   | 123 |   |
| As      of March 31, 2008:                                                                                                                                                                                                                                                             |                    |   |   |                    |   |   |                               |   |   |   |   |   |                           |   |   |         |   |   |   |   |   |   |   |
| Total      assets                                                                                                                                                                                                                                                                      | $                       | 10,762 |   |                    | $      | 6,333  |                               |   | $      | 4,184  |   |   | $                              | 897    |   |         | $      | (1,418 | ) |   | $ | 20,758 |   |
| As      of December 31, 2007:                                                                                                                                                                                                                                                          |                    |   |   |                    |   |   |                               |   |   |   |   |   |                           |   |   |         |   |   |   |   |   |   |   |
| Total      assets                                                                                                                                                                                                                                                                      | $                       | 10,852 |   |                    | $      | 6,385  |                               |   | $      | 4,027  |   |   | $                              | 965    |   |         | $      | (1,501 | ) |   | $ | 20,728 |   |

| (a)         | Represents      net income available to common shareholders; 100% of CILCO’s preferred      stock dividends are included in the Illinois Regulated      segment. |
|-----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  Three      Months                                                                                                                                                                                                                                                                                                                                                                                            | Missouri      Regulated | Other      (a) |   |   | ConsolidatedUE |   |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|----------------|--------|--------|----------------|--------|
| 2008:                                                                                                                                                                                                                                                                                                                                                                                                              |                    |           |   |   |           |   |   |   |
| Revenues                                                                           | $                       | 724            |   |   | $              | -      |   |   | $ | 724 |   |
| Net      income(b)                                                                 |                    | 52             |   |   |           | 11     |   |   |   | 63 |   |
| 2007:                                                                                                                                                                                                                                                                                                                                                                                                              |                    |           |   |   |           |   |   |   |   |   |   |
| Revenues                                                                           | $                       | 650            |   |   | $              | -      |   |   | $ | 650 |   |
| Net      income(b)                                                                 |                    | 18             |   |   |           | 14     |   |   |   | 32 |   |
| As      of March 31, 2008:                                                                                                                                                                                                                                                                                                                                                                                         |                    |           |   |   |           |   |   |   |   |   |   |
| Total      assets                                                                                                | $                       | 10,762         |   |   | $              | -      |   |   | $ | 10,762 |   |
| As      of December 31, 2007:                                                                                                                                                                                                                                                                                                                                                                                      |                    |           |   |   |           |   |   |   |   |   |   |
| Total      assets                                                                                           | $                       | 10,852         |   |   | $              | 51     |   |   | $ | 10,903 |   |

| (a)         | Included      40% interest in EEI through February 29,2008. |
|-----------------------|-------------------------------------------------------------|

|   Three      Months                                                                                                                                                                                                                                                                            | Illinois      Regulated |   |   | Non-rate-regulated      Generation |   |   | CILCORPOther |   |   | IntersegmentEliminations |   |   | ConsolidatedCILCORP |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|--------|--------|------------------------------------|--------|--------|--------------|--------|--------|--------------------------|--------|--------|---------------------|--------|
| 2008:                                                                                                                                                                                                                                                                                                    |                    |   |   |                               |   |   |         |   |   |                     |   |   |                |   |
| External      revenues                                                  | $                       | 266    |   |                               | $      | 79     |         |   | $      | -                        |   |   | $                   | -      |   |   | $ | 345 |   |
| Intersegment      revenues                                              |                    | -      |   |                               |   | 1      |         |   |   | -                        |   |   |                | (1     | ) |   |   |   |   |
| Net      income(a)                                                      |                    | 12     |   |                               |   | 8      |         |   |   | -                        |   |   |                | -      |   |   |   | 20 |   |
| 2007:                                                                                                                                                                                                                                                                                                    |                    |   |   |                               |   |   |         |   |   |                     |   |   |                |   |   |   |   |   |   |
| External      revenues                                                  | $                       | 239    |   |                               | $      | 76     |         |   | $      | -                        |   |   | $                   | -      |   |   | $ | 315 |   |
| Intersegment      revenues                                              |                    | -      |   |                               |   | 1      |         |   |   | -                        |   |   |                | (1     | ) |   |   | - |   |
| Net      income(a)                                                      |                    | 8      |   |                               |   | 13     |         |   |   | -                        |   |   |                | -      |   |   |   | 21 |   |
| As      of March 31, 2008:                                                                                                                                                                                                                                                                               |                    |   |   |                               |   |   |         |   |   |                     |   |   |                |   |   |   |   |   |   |
| Total      assets(b)                                                                                                                                                                                                                                                                                     | $                       | 1,200  |   |                               | $      | 1,502  |         |   | $      | 2                        |   |   | $                   | (191   | ) |   | $ | 2,513 |   |
| As      of December 31, 2007:                                                                                                                                                                                                                                                                            |                    |   |   |                               |   |   |         |   |   | -                        |   |   |                |   |   |   |   |   |   |
| Total      assets(b)                                                                                                                                                                                                                                                                                     | $                       | 1,202  |   |                               | $      | 1,455  |         |   | $      | 1                        |   |   | $                   | (199   | ) |   | $ | 2,459 |   |

| (a)         | Represents      net income available to the common shareholder (Ameren); 100% of CILCO’s      preferred stock dividends are included in the Illinois Regulated      segment. |
|-----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|   Three      Months                                                                                                                                                                                                                                                                            | Illinois      Regulated |   |   | Non-rate-regulated      Generation |   |   | CILCOOther |   |   | IntersegmentEliminations |   |   | ConsolidatedCILCO |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|--------|--------|------------------------------------|--------|--------|------------|--------|--------|--------------------------|--------|--------|-------------------|--------|
| 2008:                                                                                                                                                                                                                                                                                                    |                    |   |   |                               |   |   |       |   |   |                     |   |   |              |   |
| External      revenues                                                  | $                       | 266    |   |                               | $      | 79     |       |   | $      | -                        |   |   | $                 | -      |   |   | $ | 345 |   |
| Intersegment      revenues                                              |                    | -      |   |                               |   | 1      |       |   |   | -                        |   |   |              | (1     | ) |   |   | – |   |
| Net      income(a)                                                      |                    | 12     |   |                               |   | 14     |       |   |   | -                        |   |   |              | -      |   |   |   | 26 |   |
| 2007:                                                                                                                                                                                                                                                                                                    |                    |   |   |                               |   |   |       |   |   |                     |   |   |              |   |   |   |   |   |   |
| External      revenues                                                  | $                       | 239    |   |                               | $      | 76     |       |   | $      | -                        |   |   | $                 | -      |   |   | $ | 315 |   |
| Intersegment      revenues                                              |                    | -      |   |                               |   | 1      |       |   |   | -                        |   |   |              | (1     | ) |   |   | - |   |
| Net      income(a)                                                      |                    | 8      |   |                               |   | 19     |       |   |   | -                        |   |   |              | -      |   |   |   | 27 |   |
| As      of March 31, 2008:                                                                                                                                                                                                                                                                               |                    |   |   |                               |   |   |       |   |   |                     |   |   |              |   |   |   |   |   |   |
| Total      assets                                                       | $                       | 1,011  |   |                               | $      | 919    |       |   | $      | -                        |   |   | $                 | (1     | ) |   | $ | 1,929 |   |
| As      of December 31, 2007:                                                                                                                                                                                                                                                                            |                    |   |   |                               |   |   |       |   |   |                     |   |   |              |   |   |   |   |   |   |
| Total      assets                                                       | $                       | 1,012  |   |                               | $      | 859    |       |   | $      | -                        |   |   | $                 | (9     | ) |   | $ | 1,862 |   |

| (a)         | Represents      net income available to the common shareholder (CILCORP); 100% of CILCO’s      preferred stock dividends are included in the Illinois Regulated      segment. |
|-----------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Severe      ice storms reduced Ameren’s first quarter 2007 net income by $18      million. |
|--------------------|--------------------------------------------------------------------------------------------------|

| ·   | A      FERC order that resettled costs among market participants, retroactive to      2005, reduced Ameren’s first quarter 2007 net income by $10      million. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      net costs associated with the Illinois electric settlement agreement      reduced Ameren net income by  $6 million in the first quarter of      2008, while the reversal of a 2006 charge related to funding commitments      for the Illinois Customer Elect electric rate increase phase-in plan      benefited first quarter 2007 net income by $10  million. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Net      mark-to-market gains from nonqualifying hedges increased Ameren’s first      quarter 2008 net income by   $10 million, as compared to      losses of $4 million in the first quarter of  2007. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| ·   | UE      operates a rate-regulated electric generation, transmission and      distribution business, and a rate-regulated natural gas transmission and      distribution business in Missouri. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | CIPS      operates a rate-regulated electric and natural gas transmission and      distribution business in Illinois. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------|

| ·   | Genco      operates a non-rate-regulated electric generation  business. |
|--------------------|-------------------------------------------------------------------------|

| ·   | CILCO,      a subsidiary of CILCORP (a holding company), operates a rate-regulated      electric and natural gas transmission and distribution business and a      non-rate-regulated electric generation business (through its subsidiary,      AERG) in Illinois. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | IP      operates a rate-regulated electric and natural gas transmission and      distribution business in Illinois. |
|--------------------|---------------------------------------------------------------------------------------------------------------------|

| ·   | increased      plant availability and margins on interchange sales in the Missouri      Regulated segment; |
|--------------------|------------------------------------------------------------------------------------------------------------|

| ·   | increased      plant availability in the Non-rate-regulated Generation      segment; |
|--------------------|--------------------------------------------------------------------------------------|

| ·   | the      absence of costs in 2008 that were incurred in January 2007 associated      with electric outages caused by a severe ice storm (9 cents per      share); |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | net      mark-to-market gains on energy and fuel-related transactions (7 cents per      share); |
|--------------------|-------------------------------------------------------------------------------------------------|

| ·   | higher      electric rates, lower depreciation expense and decreased income tax      expense in the Missouri Regulated segment pursuant to the MoPSC electric      rate order for UE issued in May 2007 (6 cents per  share); |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | the      absence of costs in 2008 that were incurred in 2007 as a result of a March      2007 FERC order that resettled costs among market participants retroactive      to 2005  (5 cents per share);and |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| ·   | favorable      weather conditions (estimated at 3 cents per  share). |
|--------------------|----------------------------------------------------------------------|

| ·   | higher      fuel and related transportation prices (9 cents per  share); |
|--------------------|--------------------------------------------------------------------------|

| ·         | increased      distribution system reliability expenditures (6 cents per      share); |
|--------------------------|--------------------------------------------------------------------------------------------|

|  | ·   | the      absence in 2008 of the reversal, recorded in 2007, of the Illinois      Customer Elect electric rate increase phase-in plan accrual (5 cents per      share); |
|--|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | ·   | the      implementation of new seasonal delivery service tariffs at the Ameren      Illinois Utilities, which will have no impact on total annual revenues (5      cents per share); and |
|--|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | ·   | electric      rate relief and customer assistance programs provided to certain Ameren      Illinois Utilities electric customers under the Illinois electric      settlement agreement (3 cents pershare). |
|--|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                             | Three      Months |   |
|----------------------------------|-------------------|--------|
|                             | 2008              |   |   | 2007 |   |
| Net      income:                 |              |   |   |   |   |
|    UE(a)          | $                 | 63     |   |   | $ | 32 |   |
|    CIPS           |              | 2      |   |   |   | 11 |   |
|    Genco          |              | 46     |   |   |   | 43 |   |
|    CILCORP        |              | 20     |   |   |   | 21 |   |
|    IP             |              | 2      |   |   |   | 14 |   |
|    Other(b)  |              | 5      |   |   |   | 2 |   |
| Ameren      net income           | $                 | 138    |   |   | $ | 123 |   |

| (a)   | Includes      earnings from a non-rate-regulated 40% interest in EEI through February      29, 2008. |
|-----------------|------------------------------------------------------------------------------------------------------|

| (b)   | Includes      earnings from non-rate-regulated operations and an 80% interest in EEI      held by Resources Company since February 29, 2008, as well as corporate      general and administrative expenses, and intercompany eliminations. Prior      to February 29, 2008, included a 40% interest in EEI held by Development      Company, as well as corporate general and administrative expenses and      intercompany eliminations. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                                                                                                                                                                                                                                                                                                                 | Missouri      Regulated |   |   | Illinois      Regulated |   |   | Non-rate-regulated      Generation |   |   | Other      / IntersegmentEliminations |   |   |  Total |   |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|--------|--------|-------------------------|--------|--------|------------------------------------|--------|--------|---------------------------------------|--------|--------|-------------|--------|
| Three      Months 2008:                                                                                                                                                                                                                                                                                                              |                    |   |   |                    |   |   |                               |   |   |                                  |   |   |        |   |
| Electric      margin                                                                      | $                       | 441    |   |                    | $      | 178    |                               |   | $      | 272                                   |   |   | $           | (13    | ) |   | $ | 878 |   |
| Gas      margin                                                                           |                    | 28     |   |                    |   | 126    |                               |   |   | -                                     |   |   |        | (1     | ) |   |   | 153 |   |
| Other      operations and      maintenance                                                |                    | (217   | )      |                    |   | (143   | )                                  |   |   | (78                                   | )      |   |        | 15     |   |   |   | (423 | ) |
| Depreciation      and      amortization                                                   |                    | (81    | )      |                    |   | (60    | )                                  |   |   | (28                                   | )      |   |        | (7     | ) |   |   | (176 | ) |
| Taxes      other than income      taxes                                                   |                    | (60    | )      |                    |   | (43    | )                                  |   |   | (8                                    | )      |   |        | (2     | ) |   |   | (113 | ) |
| Other      income                                                                                                       |                    | 12     |   |                    |   | 4      |                               |   |   | 1                                     |   |   |        | -      |   |   |   | 17 |   |
| Interest      expense                                                                     |                    | (41    | )      |                    |   | (35    | )                                  |   |   | (21                                   | )      |   |        | (3     | ) |   |   | (100 | ) |
| Income      taxes                                                                         |                    | (29    | )      |                    |   | (9     | )                                  |   |   | (52                                   | )      |   |        | 3      |   |   |   | (87 | ) |
| Minority      interest and preferred dividends                                                                                                                                                                                                                                                                                       |                    | (1     | )      |                    |   | (2     | )                                  |   |   | (8                                    | )      |   |        | -      |   |   |   | (11 | ) |
| Net      income      (loss)                                                               | $                       | 52     |   |                    | $      | 16     |                               |   | $      | 78                                    |   |   | $           | (8     | ) |   | $ | 138 |   |
| Three      Months 2007:                                                                                                                                                                                                                                                                                                              |                    |   |   |                    |   |   |                               |   |   |                                  |   |   |        |   |   |   |   |   |   |
| Electric      margin                                                                      | $                       | 408    |   |                    | $      | 179    |                               |   | $      | 250                                   |   |   | $           | (10    | ) |   | $ | 827 |   |
| Gas      margin                                                                           |                    | 27     |   |                    |   | 115    |                               |   |   | -                                     |   |   |        | (2     | ) |   |   | 140 |   |
| Other      revenues                                                                       |                    | 1      |   |                    |   | 2      |                               |   |   | -                                     |   |   |        | (3     | ) |   |   | - |   |
| Other      operations and      maintenance                                                |                    | (223   | )      |                    |   | (121   | )                                  |   |   | (68                                   | )      |   |        | 23     |   |   |   | (389 | ) |
| Depreciation      and      amortization                                                   |                    | (87    | )      |                    |   | (60    | )                                  |   |   | (27                                   | )      |   |        | (9     | ) |   |   | (183 | ) |
| Taxes      other than income      taxes                                                   |                    | (57    | )      |                    |   | (36    | )                                  |   |   | (8                                    | )      |   |        | (1     | ) |   |   | (102 | ) |
| Other      income and      (expenses)                                                     |                    | 9      |   |                    |   | 3      |                               |   |   | 1                                     |   |   |        | (2     | ) |   |   | 11 |   |
| Interest      expense                                                                     |                    | (48    | )      |                    |   | (29    | )                                  |   |   | (25                                   | )      |   |        | 2      |   |   |   | (100 | ) |
| Income      taxes                                                                         |                    | (11    | )      |                    |   | (18    | )                                  |   |   | (46                                   | )      |   |        | 4      |   |   |   | (71 | ) |
| Minority      interest and preferred dividends                                                                                                                                                                                                                                                                                       |                    | (1     | )      |                    |   | (2     | )                                  |   |   | (7                                    | )      |   |        | -      |   |   |   | (10 | ) |
| Net      income                                                                           | $                       | 18     |   |                    | $      | 33     |                               |   | $      | 70                                    |   |   | $           | 2      |   |   | $ | 123 |   |

----

| Three      Months                                                                                   | Ameren(a) |   |   | UE     |   |   | CIPS   |   |   | Genco  |   |   | CILCORP |   |   | CILCO  |   |   | IP     |   |
|-----------------------------------------------------------------------------------------------------|-----------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|---------|--------|--------|--------|--------|--------|--------|--------|
| Electric      revenue change:                                                                       |      |   |   |   |   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |
| Effect      of weather (estimate)                                                                   | $         | 4      |   |   | $      | 1      |   |   | $      | 1      |   |   | $       | -      |   |   | $      | 1      |   |   | $ | 1 |   |   | $ | 1 |   |
| UE      electric rate increase                                                                      |      | 9      |   |   |   | 9      |   |   |   | -      |   |   |    | -      |   |   |   | -      |   |   |   | - |   |   |   | - |   |
| Interchange      revenues, excluding estimated   weather      impact of $(3) million |      | 32     |   |   |   | 32     |   |   |   | -      |   |   |    | -      |   |   |   | -      |   |   |   | - |   |   |   | - |   |
| Illinois      electric settlement agreement - net                                                   |      |   |   |   |   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|   of      reimbursement                                                                   |      | (11    | )      |   |   | -      |   |   |   | (2     | )      |   |    | (4     | )      |   |   | (3     | )      |   |   | (3 | ) |   |   | (2 | ) |
| FERC-ordered      MISO resettlements –  March      2007                             |      | (13    | )      |   |   | -      |   |   |   | -      |   |   |    | (8     | )      |   |   | (4     | )      |   |   | (4 | ) |   |   | - |   |
| Illinois      rate redesign                                                                         |      | (38    | )      |   |   | -      |   |   |   | (14    | )      |   |    | -      |   |   |   | (6     | )      |   |   | (6 | ) |   |   | (18 | ) |
| Net      mark-to-market gains on energy  contracts                                        |      | 12     |   |   |   | 4      |   |   |   | -      |   |   |    | -      |   |   |   | -      |   |   |   | - |   |   |   | - |   |
| Growth      and other                                                                               |      | 9      |   |   |   | 22     |   |   |   | (16    | )      |   |    | -      |   |   |   | 26     |   |   |   | 26 |   |   |   | (15 | ) |
| Total      electric revenue change                                                                  | $         | 4      |   |   | $      | 68     |   |   | $      | (31    | )      |   | $       | (12    | )      |   | $      | 14     |   |   | $ | 14 |   |   | $ | (34 | ) |
| Fuel      and purchased power change:                                                               |      |   |   |   |   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Fuel:                                                                                               |      |   |   |   |   |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Generation      and other                                                                           | $         | (19    | )      |   | $      | (8     | )      |   | $      | -      |   |   | $       | (4     | )      |   | $      | (5     | )      |   | $ | (5 | ) |   | $ | - |   |
| Emission      allowance sales (costs)                                                               |      | -      |   |   |   | (2     | )      |   |   | -      |   |   |    | 1      |   |   |   | 1      |   |   |   | 1 |   |   |   | - |   |
| Net      mark-to-market gains on fuel  contracts                                          |      | 11     |   |   |   | 6      |   |   |   | -      |   |   |    | 5      |   |   |   | 1      |   |   |   | 1 |   |   |   | - |   |
| Price                                                                                               |      | (31    | )      |   |   | (18    | )      |   |   | -      |   |   |    | (9     | )      |   |   | (2     | )      |   |   | (2 | ) |   |   | - |   |
| Purchased      power                                                                                |      | 33     |   |   |   | (26    | )      |   |   | 13     |   |   |    | 21     |   |   |   | (8     | )      |   |   | (8 | ) |   |   | 10 |   |
| Illinois      rate redesign                                                                         |      | 21     |   |   |   | -      |   |   |   | 8      |   |   |    | -      |   |   |   | 3      |   |   |   | 3 |   |   |   | 10 |   |
| FERC-ordered      MISO resettlements –   March      2007                       |      | 32     |   |   |   | 13     |   |   |   | 4      |   |   |    | -      |   |   |   | 3      |   |   |   | 3 |   |   |   | 12 |   |
| Total      fuel and purchased power change                                                          | $         | 47     |   |   | $      | (35    | )      |   | $      | 25     |   |   | $       | 14     |   |   | $      | (7     | )      |   | $ | (7 | ) |   | $ | 32 |   |
| Net      change in electric margins                                                                 | $         | 51     |   |   | $      | 33     |   |   | $      | (6     | )      |   | $       | 2      |   |   | $      | 7      |   |   | $ | 7 |   |   | $ | (2 | ) |
| Net      change in gas margins                                                                      | $         | 13     |   |   | $      | 1      |   |   | $      | 3      |   |   | $       | -      |   |   | $      | 4      |   |   | $ | 4 |   |   | $ | 3 |   |

|  | (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|--|-----------------|----------------------------------------------------------------------------------------------------------------|

| ·   | Net      mark-to-market gains of $23 million on energy and fuel-related      transactions. |
|--------------------|--------------------------------------------------------------------------------------------|

| ·   | An      increase in margin on interchange sales of $22 million due to a 12%      increase in average sales prices and a 13% increase in sales volume      supported by increased hydroelectric generation due to improved water      levels. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Increased      plant availability, primarily in the Non-rate-regulated Generation      segment. Ameren’s baseload nuclear and coal-fired generating plants’      average capacity and equivalent availability factors were approximately      82% and 88%, respectively, in the first quarter      of 2008 compared with 79% and 86%, respectively, in the first quarter of      2007. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Reduced      net MISO purchased power costs of $19 million due to the absence of the      March 2007 FERC order that resettled costs in 2007 among market      participants retroactive to 2005. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Other      MISO purchased power costs, excluding the effect of the March 2007 FERC      order, declined $16 million. |
|--------------------|----------------------------------------------------------------------------------------------------------------------|

| ·   | UE’s      electric rate increase that went into effect June 4, 2007, which increased      electric margin by an estimated $9million. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Growth      and other, including the effect of the 2008 leap year  day. |
|--------------------|-------------------------------------------------------------------------|

| ·   | A      13% increase in fuelprices. |
|--------------------|------------------------------------|

----

| ·   | The      implementation of new seasonal delivery service tariffs at the Ameren      Illinois Utilities, effective January 2, 2008, decreased electric margin      by $17 million. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      Illinois electric settlement agreement, which reduced electric margin by      $11 million. |
|--------------------|-----------------------------------------------------------------------------------------------------|

| ·   | An      increase in margin on interchange sales of $22 million due to a 12%      increase in average sales prices and a 13% increase in sales volume      supported by increased hydroelectric generation due to improved water      levels. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Reduced      MISO purchased power costs of $13 million due to the absence of the March      2007 FERC order. |
|--------------------|--------------------------------------------------------------------------------------------------------------|

| ·   | Net      mark-to-market gains of $10 million on energy and fuel-related      transactions. |
|--------------------|--------------------------------------------------------------------------------------------|

| ·   | The      electric rate increase that went into effect June 4, 2007, which increased      electric margin by an estimated $9million. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Growth      and other, including the effect of the 2008 leap year  day. |
|--------------------|-------------------------------------------------------------------------|

| ·   | A      14% increase in fuel prices. |
|--------------------|-------------------------------------|

| ·   | Higher      purchased power prices of $7million. |
|--------------------|--------------------------------------------------|

| ·   | Reduced      emission allowance sales of $2million. |
|--------------------|-----------------------------------------------------|

| ·   | The      implementation of new seasonal delivery service tariffs decreased electric      margin by $6 million. |
|--------------------|----------------------------------------------------------------------------------------------------------------|

| ·   | The      Illinois electric settlement agreement, which reduced electric margin by      $2 million. |
|--------------------|----------------------------------------------------------------------------------------------------|

|                                 |   | Three      Months |           |
|--------------------------------------|--------|-------------------|----------------|
| CILCO      (Illinois Regulated)      |   | $                 | 7              |   |
| CILCO      (AERG)                    |   |              |    - |   |
| Total      change in electric margin |   | $                 | 7              |   |

| ·   | The      implementation of new seasonal delivery service tariffs decreased electric      margin by $3 million. |
|--------------------|----------------------------------------------------------------------------------------------------------------|

| ·   | The      Illinois electric settlement agreement, which reduced electric margin by      $1 million. |
|--------------------|----------------------------------------------------------------------------------------------------|

----

| ·   | The      implementation of new seasonal delivery service tariffs decreased electric      margin by $8 million. |
|--------------------|----------------------------------------------------------------------------------------------------------------|

| ·   | The      Illinois electric settlement agreement, which reduced electric margin by      $2 million. |
|--------------------|----------------------------------------------------------------------------------------------------|

| ·   | Increased      plant availability. Genco’s baseload coal-fired generating plants’ average      capacity and equivalent availability factors were 79% and 86%,      respectively, in the first quarter of 2008 compared with 73% and 81%,      respectively, in the first quarter of2007. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | MISO      purchased power costs decreased $3million. |
|--------------------|------------------------------------------------------|

| ·   | Replacement      power cost insurance recoveries of $6million. |
|--------------------|----------------------------------------------------------------|

| ·   | Net      mark-to-market gains of $5 million on fuel-related      transactions. |
|--------------------|-------------------------------------------------------------------------------------|

| ·   | A      9% increase in fuelprices. |
|--------------------|-----------------------------------|

| ·   | Reduced      MISO-related revenues of $8 million due to the absence of the March 2007      FERC order. |
|--------------------|--------------------------------------------------------------------------------------------------------|

| ·   | The      Illinois electric settlement agreement, which reduced electric margin by      $4 million. |
|--------------------|----------------------------------------------------------------------------------------------------|

| ·   | A      10% increase in coal prices together with greater oil consumption during      plant startups. |
|--------------------|------------------------------------------------------------------------------------------------------|

| ·   | Reduced      MISO-related revenues of $4 million due to the absence of the March 2007      FERC order. |
|--------------------|--------------------------------------------------------------------------------------------------------|

| ·   | The      Illinois electric settlement agreement, which reduced electric margin by      $2 million. |
|--------------------|----------------------------------------------------------------------------------------------------|

| ·   | Increased      plant availability. AERG’s baseload coal-fired generating plants’ average      capacity and equivalent availability factors were 72% and 77%,      respectively, in the first quarter of 2008 compared with 62% and 70%,      respectively, in the first quarter of2007. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Emission      allowance expenses decreased $1million. |
|--------------------|-------------------------------------------------------|

| ·   | Net      mark-to-market gains of $1 million on fuel-related      transactions. |
|--------------------|--------------------------------------------------------------------------------|

| ·   | An      8% increase in fuel prices. |
|--------------------|-------------------------------------|

| ·   | Decreased      plant availability. EEI’s baseload coal-fired generating plant’s average      capacity and equivalent availability factors were both 90% in the first      quarter 2008 compared with 93% in the first quarter  2007. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

----

----

----

|                                                                                                                  |   | Net      Cash Provided By(Used      In) Operating Activities |   |   | Net      Cash Used InInvesting      Activities |   |   | Net      Cash Provided By(Used      In) Financing Activities |   |
|-----------------------------------------------------------------------------------------------------------------------|--------|--------------------------------------------------------------|--------|--------|------------------------------------------------|--------|--------|--------------------------------------------------------------|--------|
|                                                                                                                  |   | 2008                                                         |   |   | 2007                                           |   |   | Variance                                                     |   |   | 2008 |   |   | 2007 |   |   | Variance |   |   | 2008 |   |   | 2007 |   |   | Variance |   |
| Ameren(a)                   |   | $                                                            | 326    |   |                                           | $      | 358    |                                                         |   | $ | (32 | ) |   | $ | (527 | ) |   | $ | (386 | ) |   | $ | (141 | ) |   | $ | 32 |   |   | $ | 52 |   |   | $ | (20 | ) |
| UE                          |   |                                                         | (31    | )      |                                           |   | (50    | )                                                            |   |   | 19 |   |   |   | (324 | ) |   |   | (221 | ) |   |   | (103 | ) |   |   | 170 |   |   |   | 270 |   |   |   | (100 | ) |
| CIPS                        |   |                                                         | 55     |   |                                           |   | 10     |                                                         |   |   | 45 |   |   |   | (22 | ) |   |   | (34 | ) |   |   | 12 |   |   |   | (41 | ) |   |   | 64 |   |   |   | (105 | ) |
| Genco                       |   |                                                         | 79     |   |                                           |   | 69     |                                                         |   |   | 10 |   |   |   | (60 | ) |   |   | (37 | ) |   |   | (23 | ) |   |   | (19 | ) |   |   | (32 | ) |   |   | 13 |   |
| CILCORP                     |   |                                                         | 103    |   |                                           |   | 42     |                                                         |   |   | 61 |   |   |   | (78 | ) |   |   | (1 | ) |   |   | (77 | ) |   |   | 11 |   |   |   | (18 | ) |   |   | 29 |   |
| CILCO                       |   |                                                         | 104    |   |                                           |   | 58     |                                                         |   |   | 46 |   |   |   | (78 | ) |   |   | (1 | ) |   |   | (77 | ) |   |   | 10 |   |   |   | (35 | ) |   |   | 45 |   |
| IP                          |   |                                                         | 89     |   |                                           |   | 58     |                                                         |   |   | 31 |   |   |   | (34 | ) |   |   | (62 | ) |   |   | 28 |   |   |   | (60 | ) |   |   | 47 |   |   |   | (107 | ) |

| (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

----

----

| Credit      Facility                    | Expiration        |   | Amount      Committed |                  |   | Amount      Available |   |
|-----------------------------------------|-------------------|--------|-----------------------|-----------------------|--------|-----------------------|--------|
| Ameren,      UE and Genco:              |              |   |                  |                  |   |                  |   |
| Multiyear revolving(a)                  | July      2010    |   | $                     | 1,150                 |   |                  | $      | 233 |   |
| CIPS,      CILCORP, CILCO, IP and AERG: |              |   |                  |                  |   |                  |   |   |   |
| 2006 Multiyear revolving(b)(c)          | January      2010 |   |                  |         500 |   |                  |   | 185 |   |
| 2007 Multiyear revolving(b)(d)          | January      2010 |   |                  |         500 |   |                  |   |  50 |   |

| (a)   | Ameren      Companies may access this credit facility through intercompany borrowing      arrangements. |
|-----------------|---------------------------------------------------------------------------------------------------------|

| (b)   | See      Note 3 - Credit Facilities and Liquidity to our financial statements under      Part I, Item 1, of this report for discussion of the amendments to these      facilities. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (c)   | The      maximum amount available to each borrower under this facility at March 31,      2008, including for issuance of letters of credit, was limited as follows:      CIPS - $135 million, CILCORP - $50 million, CILCO - $75 million, IP - $150      million and AERG - $200 million. In July 2007, CILCO shifted $75 million      of its capacity under this facility to the 2007 $500 million credit      facility. Accordingly, as of March 31, 2008, CILCO had a sublimit of $75      million under this facility and a $75 million sublimit under the 2007      credit facility. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (d)   | The      maximum amount available to each borrower under this facility at March 31,      2008, including for the issuance of letters of credit, was limited as      follows: CILCORP - $125 million, CILCO - $75 million, IP - $200 million      and AERG - $100 million. CIPS and CILCO have the option of permanently      reducing their ability to borrow under the 2006 $500 million credit      facility and shifting such capacity, up to the same limits, to the 2007      $500 million credit facility. In July 2007, CILCO shifted $75 million of      its sublimit under the 2006 $500 million credit facility to this      facility. |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                                         |                                                    |   | Three      Months |   |
|----------------------------------------------|---------------------------------------------------------|--------|-------------------|--------|
|                                         | Month      Issued, Redeemed,Repurchased      or Matured |   | 2008              |   |   | 2007 |   |
| Issuances                                    |                                                    |   |              |   |   |   |   |
| Common      stock                            |                                                    |   |              |   |   |   |   |
| Ameren:                                      |                                                    |   |              |   |   |   |   |
| DRPlus and    401(k)                         | Various                                                 |   | $                 | 46     |   |   | $ | 21 |   |
| Total      common stock issuances            |                                                    |   | $                 | 46     |   |   | $ | 21 |   |
| Redemptions,      Repurchases and Maturities |                                                    |   |              |   |   |   |   |   |   |
| Long-term      debt                          |                                                    |   |              |   |   |   |   |   |   |
| Ameren:                                      |                                                    |   |              |   |   |   |   |   |   |
| 2002      5.70% Notes due 2007               | February                                                |   |              | -      |   |   |   | 100 |   |

| CILCO:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |    |   |   |   |   |   |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|--------|--------|--------|--------|--------|--------|
| 7.50%      First Mortgage bonds due      2007                                                                         | January |   |   | -      |   |   |   | 50 |   |
| IP:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |    |   |   |   |   |   |   |   |   |
| Note      payable to IP SPT:                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |    |   |   |   |   |   |   |   |   |
| 5.65%      Series due 2008                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | Various |   |   | 19     |   |   |   | 24 |   |
| Total      Ameren long-term debt redemptions, repurchases and    maturities                                                                                                                                                                                                                                                                                                                                                                                                                   |    |   | $      | 19     |   |   | $      | 174 |   |

|         | EffectiveDate     |   | AuthorizedAmount |   |   | Issued |   |   | Available |   |
|--------------|-------------------|--------|------------------|--------|--------|--------|--------|--------|-----------|--------|
| Ameren  | June      2004    |   | $                | 2,000  |   |   | $      | 459    |      |   | $ | 1,541 |   |
| UE(a)        | October      2005 |   |             | 1,000  |   |   |   | 685    |      |   |   | 315 |   |
| CIPS         | May      2001     |   |             | 250    |   |   |   | 211    |      |   |   | 39 |   |

| (a)   | In      April 2008, UE issued $250 million principal amount of senior secured      notes pursuant to its Form S-3 shelf registration statement, which leaves      $65 million of securities currently available for  issuance. |
|-----------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                          |   | Three      Months |   |
|-------------------------------|--------|-------------------|--------|
|                          |   | 2008              |   |   | 2007 |   |
| UE                            |   | $                 | 77     |   |   | $ | 80 |   |
| Genco                         |   |              | 24     |   |   |   | 39 |   |
| IP                            |   |              | 15     |   |   |   | - |   |
| Nonregistrants                |   |              | 17     |   |   |   | 12 |   |
| Dividends      paid by Ameren |   | $                 | 133    |   |   | $ | 131 |   |

----

|                                | Moody’s | S&P | Fitch  |
|-------------------------------------|---------------|---------|--------|
| Ameren:                             |          |    |   |
| Issuer/corporate      credit rating | Baa2          | BBB-    | BBB+   |
| Senior      unsecured debt          | Baa2          | BB+     | BBB+   |
| Commercial      paper               | P-2           | A-3     | F2     |
| UE:                                 |          |    |   |
| Issuer/corporate      credit rating | Baa1          | BBB-    | A-     |
| Secured      debt                   | A3            | BBB     | A+     |
| Commercial      paper               | P-2           | A-3     | F2     |
| CIPS:                               |          |    |   |
| Issuer/corporate      credit rating | Ba1           | BB      | BB+    |
| Secured      debt                   | Baa3          | BBB     | BBB    |
| Senior      unsecured debt          | Ba1           | BBB-    | BBB-   |
| Genco:                              |          |    |   |
| Issuer/corporate      credit rating | -             | BBB-    | BBB+   |
| Senior      unsecured debt          | Baa2          | BBB-    | BBB+   |
| CILCORP:                            |          |    |   |
| Issuer/corporate      credit rating | -             | BB      | BB+    |
| Senior      unsecured debt          | Ba2           | BB      | BB+    |
| CILCO:                              |          |    |   |
| Issuer/corporate      credit rating | Ba1           | BB      | BB+    |
| Secured      debt                   | Baa2          | BBB     | BBB    |
| IP:                                 |          |    |   |
| Issuer/corporate      credit rating | Ba1           | BB      | BB+    |
| Secured      debt                   | Baa3          | BBB-    | BBB    |

----

|  | ·   | The      earnings of UE, CIPS, CILCO and IP are largely determined by the      regulation of their rates by state agencies. With rising costs, including      fuel and related transportation, purchased power, labor, material,      depreciation and financing costs, coupled with increased capital and      operations and maintenance expenditures targeted at enhanced distribution      system reliability and environmental compliance, Ameren, UE, CIPS, CILCO      and IP expect to experience regulatory lag until requests to increase      rates to recover such costs are granted by state regulators. Ameren, UE,      CIPS, CILCO and IP expect more frequent rate cases will be necessary in      the future. UE agreed not to file a natural gas delivery rate case before      March 15, 2010. |
|--|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      Ameren Illinois Utilities filed delivery service rate cases with the ICC      in November 2007 due to inadequate recovery of costs and low returns on      equity of less than 5% experienced in 2007 and 4% expected in 2008. In      April 2008, the Ameren Illinois Utilities revised their requests to an      increase in annual revenues for electric delivery service of $163 million      in the aggregate (CIPS - $28 million, CILCO - $4 million, and IP - $131      million). The electric rate increase requests were based on an 11% return      on equity, a capital structure composed of 51% to 53% equity, an aggregate      rate base for the Ameren Illinois Utilities of $2.1 billion and a test      year ended December 31, 2006, with certain prospective updates. In      addition, CIPS, CILCO and IP filed requests with the ICC in November 2007      to increase their annual revenues for natural gas delivery service. In      April 2008, the Ameren Illinois Utilities revised their requests to an      increase in annual revenues for natural gas delivery service of $57      million in the aggregate (CIPS - $11 million increase, CILCO - $4 million      decrease, and IP - $50 million increase). The natural gas rate change      requests were based on an 11% return on equity, a capital structure      composed of 51% to 53% equity, an aggregate rate base for the Ameren      Illinois Utilities of $0.9 billion and a test year ended December 31,      2006, with certain prospective updates. The ICC has until the end of      September 2008 to render a decision in these rate  cases. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | UE      filed an electric rate case with the MoPSC in April 2008 in order to      recover rising costs and to earn a reasonable return on its investments.      UE’s return on equity was 9% in 2007 and is expected to decrease to 7% in      2008. UE requested to increase its annual electric revenues by $251      million. The electric rate increase is based on a 10.9% return on equity,      a capital structure composed of 51% common equity, a rate base      of  $5.9 billion and a test year ended March 31, 2008, with      updates for known and measurable changes through June 30, 2008. The MoPSC      has until March 2009 to render a decision in this rate    case. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | In      current and future rate cases, UE, CIPS, CILCO and IP will also seek cost      recovery mechanisms from their state regulators to reduce regulatory lag.      In their electric and natural gas delivery service rate cases filed in      November 2007, the Ameren Illinois Utilities requested ICC approval to      implement rate adjustment mechanisms for electric infrastructure      investments and the decoupling of natural gas revenues from sales volumes.      The ICC staff in their direct testimony filed in March 2008 opposed the      Ameren Illinois Utilities’ requests to implement a rate adjustment      mechanism for electric infrastructure investments. The ICC staff      offered limited support for the Ameren Illinois Utilities’ request to      implement a rate adjustment mechanism for the decoupling of natural gas      revenues from sales volumes. In April 2008, the Ameren Illinois Utilities      withdrew their requests for bad debt expense rate adjustment mechanisms.      In its electric rate case filed in April 2008, UE requested the MoPSC to      approve implementation of a fuel and purchased power cost recovery      mechanism. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Average      residential electric rates for CIPS, CILCO and IP increased significantly      following the expiration of a rate freeze at the end of 2006. Electric      rates rose because of the increased cost of power purchased on behalf of      the Ameren Illinois Utilities’ customers and an increase in electric      delivery service rates. Due to the magnitude of these increases, the      Illinois electric settlement agreement reached in 2007 provides      approximately $1 billion over a four-year period that began in 2007 to      fund rate relief for certain electric customers in Illinois, including      approximately      $488 million to customers of the Ameren Illinois Utilities. Funding for      the settlement is coming from electric generators in Illinois and certain      Illinois electric utilities. Pursuant to the Illinois electric settlement      agreement, the Ameren Illinois Utilities, Genco and AERG agreed to fund an      aggregate of $150 million, of which the following contributions remain to      be made as of March 31,2008: |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|    |   |  Ameren |   |   | CIPS   |   |   | CILCO(IllinoisRegulated) |   |   | IP  |   |   | Genco  |   |   | CILCO(AERG) |   |
|---------|--------|--------------|--------|--------|--------|--------|--------|--------------------------|--------|--------|-----|--------|--------|--------|--------|--------|-------------|--------|
| 2008(a) |   | $            | 31.9   |   |   | $      | 4.7    |                     |   | $      | 2.3 |   |   | $      | 6.4    |   |        | $      | 12.8 |   |   | $ | 5.7 |   |
| 2009(a) |   |         | 26.5   |   |   |   | 3.9    |                     |   |   | 1.9 |   |   |   | 4.9    |   |        |   | 10.9 |   |   |   | 4.9 |   |
| 2010(a) |   |         | 1.7    |   |   |   | 0.2    |                     |   |   | 0.1 |   |   |   | 0.4    |   |        |   | 0.7 |   |   |   | 0.3 |   |
| Total   |   | $            | 60.1   |   |   | $      | 8.8    |                     |   | $      | 4.3 |   |   | $      | 11.7   |   |        | $      | 24.4 |   |   | $ | 10.9 |   |

----

| ·   | As      part of the Illinois electric settlement agreement, the reverse auction      used for power procurement in Illinois was discontinued. It will be      replaced with a new power procurement process to be led by the IPA,      beginning in 2009. In 2008, Illinois utilities contracted for necessary      power and energy requirements primarily through a request-for-proposal      process that was subject to ICC review and approval. In March and April      2008, the ICC approved the results of the Ameren Illinois Utilities’      energy and capacity requests-for-proposals for power needs during the      period June 1, 2008 through May 31, 2009. Marketing Company was one of the      winning bidders in both of these requests-for-proposals, and UE was one of      the winning bidders in the capacity request-for-proposal. Existing supply      contracts from the September 2006 reverse auction remain in place. The      Ameren Illinois Utilities’ power procurement costs are passed directly to      its customers. The impact of the new procurement process in Illinois is      uncertain. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | As      part of the Illinois electric settlement agreement, the Ameren Illinois      Utilities entered into financial contracts with Marketing Company (for the      benefit of Genco and AERG), to lock-in energy prices for 400 to 1,000      megawatts annually of their around-the-clock power requirements during the      period June 1, 2008 to December 31, 2012, at then relevant market prices.      These financial contracts do not include capacity, are not load-following      products and do not involve the physical delivery of energy. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      MoPSC issued an order, as clarified, granting UE a $43 million increase in      base rates for electric service with new electric rates effective June 4,      2007. This order included provisions to extend UE’s Callaway nuclear plant      and fossil generation plant lives and to change the income tax method      associated with the cost of property removals. Such provisions are      expected to decrease Ameren’s and UE’s expenses by $58 million      annually. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Volatile      power prices in the Midwest affect the amount of revenues Ameren, UE,      Genco, CILCO (through AERG) and EEI can generate by marketing power into      the wholesale and spot markets and influence the cost of power purchased      in the spot markets. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      availability and performance of UE’s, Genco’s, AERG’s and EEI’s electric      generation fleet can materially impact their revenues. Genco and AERG are      seeking to raise the equivalent availability and capacity factors of their      power plants over the long-term through greater investments and a process      improvement program. The Non-rate-regulated Generation segment expects to      generate 33 million megawatthours of baseload power in 2008 (Genco – 18      million, AERG – 7 million, EEI – 8 million), 31 million megawatthours      in 2009 (Genco –  15 million, AERG - 8 million, EEI - 8 million)      and 33 million megawatthours in 2010 (Genco - 18 million, AERG - 7      million, EEI - 8 million). |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | All      but 5 million megawatthours of Genco’s and AERG’s pre-2006 wholesale and      retail electric power supply agreements expired during 2006. In 2007, 1      million megawatthours of these agreements, which had an average embedded      selling price of $35 per megawatthour, expired. Another 2 million      contracted megawatthours will expire in late 2008, which have an average      embedded selling price of $33 per megawatthour. These agreements are being      replaced with market-based sales. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      marketing strategy for the Non-rate-regulated Generation segment is to      optimize generation output in a low risk manner to minimize volatility of      earnings and cash flow, while seeking to capitalize on its low-cost      generation fleet to provide solid, sustainable returns. To accomplish this      strategy, the Non-rate-regulated Generation segment has established hedge      targets for near-term years. Through a mix of physical and financial sales      contracts, Marketing Company targets to hedge Non-rate-regulated      Generation’s expected output by 80% to 90% for the following year, 50% to      70% for two years out, and 30% to 50% for three years  out. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      future development of ancillary services and capacity markets in MISO      could increase the electric margins of UE, Genco, AERG and EEI. Ancillary      services are services necessary to support the transmission of energy from      generation resources to loads while maintaining reliable operation of the      transmission provider’s system. In February 2008, FERC conditionally      accepted the ancillary services market tariff proposed by MISO. We expect      Non-rate-regulated Generation’s ancillary services market revenues to      increase to $15 million in 2008 from $5 million realized in 2007.      Ancillary      services market revenues are allocated to Genco and AERG based on their      generation in accordance with their power supply agreements with Marketing      Company. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·              | We      expect MISO will begin development of a capacity market once its ancillary      services market is in place. A capacity market allows participants to      purchase or sell capacity products that meet reliability requirements.      MISO is currently in the process of developing a centralized regional      wholesale ancillary services market, which is expected to begin during      2008. We expect capacity and energy prices to strengthen from current      levels because of improving market liquidity and decreasing reserve      margins in MISO. Non-rate-regulated Generation’s capacity revenues are      expected to increase to approximately $40 million in 2008 from $25 million      in 2007. EEI receives payment for 100% of its capacity sales under its      power supply agreement with Marketing Company. Capacity revenues are      allocated to Genco and AERG based on their generation in accordance with      their power supply agreements with Marketing  Company.  |
|--------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·                                       | We      expect continued economic growth in our service territory and market area      to benefit energy demand in                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |

----

|   | 2008      and beyond, but higher energy prices could result in reduced demand from      customers, especially in Illinois. Future energy efficiency programs      developed by UE, CIPS, CILCO and IP and others could also result in      reduced demand for our electric generation and our electric and gas      transmission and distribution services. |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·               | In 2007,      84% of Ameren’s electric generation (UE - 76%, Genco - 96%, AERG - 99%,      EEI - 100%) was supplied by coal-fired power plants. About 94% of the coal      used by these plants (UE - 97%, Genco - 88%, AERG - 92%, EEI - 100%) was      delivered by railroads from the Powder River Basin in Wyoming. In the      past, deliveries from the Powder River Basin have been restricted because      of rail maintenance, weather, and derailments. As of March 31, 2008, coal      inventories for UE, Genco, AERG and EEI were adequate and in excess of      historical levels. UE’s coal inventories were at targeted levels, and      Genco’s, AERG’s and EEI’s coal inventories were near targeted levels.      Disruptions in coal deliveries could cause UE, Genco, AERG and EEI to      pursue a strategy that could include reducing sales of power during      low-margin periods, buying higher-cost fuels to generate required      electricity, and purchasing power from other sources.                                                                                                                                                                                                            |
|--------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·                                             | Ameren’s      fuel costs (including transportation) are expected to increase in 2008 and      beyond. Fuel costs for both Missouri Regulated and Non-rate-regulated      Generation are expected to increase approximately 35% from 2007 to 2010,      assuming Genco will be reimbursed for incremental fuel costs it is      incurring to replace coal from an Illinois mine that was closed at the end      of 2007. Genco’s supply contract with the mine owner went through      2009.  Under the Uniform Commercial Code, Genco should be entitled to      the incremental increase in its coal costs for replacement coal in 2008      and 2009. Genco is currently in negotiations with the mine owner for      reimbursement of replacement coal and related transportation costs;      however, we cannot predict the outcome of these negotations. Under      the terms of the terminated contract, Genco could have purchased 2.5      million tons of coal annually from this mine. See Item 3 - Quantitative      and Qualitative Disclosures about Market Risk of this report for      additional information about the percentage of fuel and transportation      requirements that are price-hedged for 2008 through  2012. |

| ·   | In      December 2005, there was a breach of the upper reservoir at UE’s Taum Sauk      pumped-storage hydroelectric facility. This resulted in significant      flooding in the local area, which damaged a state park. In January 2008,      the Circuit Court of Reynolds County, Missouri, approved UE’s November      2007 settlement agreement with the state of Missouri resolving the state’s      lawsuit and claims for damages and other relief related to the breach. In      addition, pursuant to the settlement agreement, UE is required to replace      the breached upper reservoir with a new reservoir, subject to FERC      authorization. UE received approval from FERC to rebuild the upper      reservoir in August 2007 and hired a contractor in November 2007. The      estimated cost to rebuild the upper reservoir is in the range of $450      million. UE expects the Taum Sauk pumped-storage hydroelectric facility to      be out of service through early 2010. UE believes that substantially all      of the damages and liabilities caused by the breach, including costs      related to the settlement agreement with the state of Missouri, the cost      of rebuilding the plant, and the cost of replacement power, up to $8      million annually, will be covered by insurance. Insurance will not cover      lost electric margins and penalties paid to FERC. Under UE’s insurance      policies, all claims by or against UE are subject to review by its      insurance carriers. As a result of this breach, UE is engaged in      litigation initiated by certain private parties. We are unable to predict      the timing or outcomes of this litigation, or its possible effect on UE’s      results of operation, financial position or liquidity. See Note 2 – Rate      and Regulatory Matters and Note 9 – Commitments and Contingencies to our      financial statements under Part I, Item 1, of this report for a further      discussion of Taum Sauk matters. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | UE’s      Callaway nuclear plant’s next scheduled refueling and maintenance outage      in the fall of 2008 is expected to last 25 to 30 days. During a scheduled      outage, which occurs every 18 months, maintenance and purchased power      costs increase, and the amount of excess power available for sale      decreases, versus non-outage years. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Over      the next few years, we expect rising employee benefit costs as well as      higher insurance and security costs      associated with additional measures we have taken, or may need to take, at      UE’s Callaway nuclear plant and at our other facilities. Insurance      premiums may also increase as a result of the Taum Sauk incident, among      other things. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Bad      debts expense and past-due accounts receivable may increase due to      rising electric and gas rates as well as statutory restrictions on      collection activities. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | As      we refinance our short-term and variable-rate debt into fixed-rate debt,      financing costs may increase. |
|--------------------|---------------------------------------------------------------------------------------------------------------------|

| ·   | We      are currently undertaking cost reduction and control initiatives      associated with the strategic sourcing of purchases and streamlining of      all aspects of our business. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      EPA has issued more stringent emission limits on all coal-fired power      plants. Between 2008 and 2017, Ameren expects that certain Ameren      Companies will be |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|               | required      to invest between $4 billion and $5 billion to retrofit their power plants      with pollution control equipment. Costs for these types of projects      continue to escalate. These investments will also result in decreased      plant availability during construction and significantly higher ongoing      operating expenses. Approximately 45% of this investment will be in      Ameren’s regulated UE operations, and it is therefore expected to be      recoverable from ratepayers. The recoverability of amounts expended in      non-rate-regulated operations will depend on whether market prices for      power adjust as a result of market conditions reflecting increased      environmental costs for generators.                                                                                                                                                                                                                                                                                                                                           |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ·   | Future      federal and state legislation or regulations that mandate limits on the      emission of greenhouse gases would result in significant increases in      capital expenditures and operating costs. Excessive costs to comply with      future legislation or regulations might force Ameren and other      similarly-situated electric power generators to close some coal-fired      facilities. In December 2007, Ameren issued a report on how it is      responding to the rising regulatory, competitive, and public pressure to      significantly reduce CO2 and      other emissions from current and proposed power plant operations. The      report included Ameren’s climate change strategy and activities, current      greenhouse gas emissions, and analysis with respect to plausible future      greenhouse gas scenarios; it is available on Ameren’s Web site.      Investments to control carbon emissions at Ameren’s coal-fired plants      would significantly increase future capital expenditures and operation and      maintenance expenses. |

| ·   | UE      continues to evaluate its longer-term needs for new baseload and peaking      electric generation capacity. At this time, UE does not expect to require      new baseload generation capacity until 2018 to 2020. However, due to the      significant time required to plan, acquire permits for, and build a      baseload power plant, UE is actively studying future plant alternatives,      including those that would use coal or nuclear fuel. In 2007, UE signed an      agreement with UniStar Nuclear to assist UE in the preparation of a      combined construction and operating license application (COLA) for filing      with the NRC. A COLA describes how a nuclear plant would be designed,      constructed and operated. In addition, UE has also signed contracts for      certain long lead-time equipment. Preparing that COLA and entering into      these contracts does not mean a decision has been made to build a nuclear      plant. These are only the first steps in the regulatory licensing and      procurement process. UE and UniStar Nuclear must submit the COLA to the      NRC in 2008 to be eligible for incentives available under provisions of      the 2005 Energy Policy Act. We cannot predict whether or when the NRC will      approve the COLA. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | UE      intends to submit a license extension application with the NRC to extend      its Callaway nuclear plant’s operating license by twenty years so that the      operating license will expire in 2044. UE cannot predict whether or when      the NRC will approve the licenseextension. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Over      the next few years, we expect to make significant investments in our      electric and gas infrastructure and to incur increased operations and      maintenance expenses to improve overall system reliability. We are      projecting higher labor and material costs for these capital expenditures.      UE announced in July 2007 plans to spend $300 million over three years for      underground cabling and reliability improvement, $135 million ($45 million      per year) for tree-trimming, and $84 million over three years      (approximately $28 million per year) for circuit and device inspection and      repair. We would expect these costs or investments to be ultimately      recovered in rates. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Increased      investments for environmental compliance, reliability improvement, and new      baseload capacity will result in higher depreciation and financing      costs. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The      Ameren Companies will incur significant capital expenditures over the next      five years for compliance with environmental regulations and to make      significant investments in their electric and gas utility infrastructure      to improve overall system reliability. Expenditures are expected to be      funded primarily with debt. |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | As      required by the MoPSC, UE filed a study in November 2007 with the MoPSC      evaluating the costs and benefits of UE’s participation in MISO. This case      is currently pending. UE’s filing noted that there were a number of      uncertainties associated with the cost-benefit study, including issues      associated with the UE-MISO service agreement. If some of these      uncertainties are ultimately resolved in a manner adverse to UE, it could      call into question whether it is cost-effective for UE to remain in MISO.      UE has advised MISO of its intent to withdraw from MISO as of December 31,      2008, in order to preserve the option to withdraw based on the outcome of      the pending MoPSC proceeding.  It is uncertain when or how the MoPSC      will rule on UE's MISO cost-benefit study or, if UE were to withdraw from      MISO, what the effect of such a withdrawal would be on  UE. |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|    |   | Interest      Expense |   |   | Net      Income(a) |   |
|---------|--------|-----------------------|--------|--------|--------------------|--------|
| Ameren  |   | $                     | 25     |   |               | $      | (15 | ) |
| UE      |   |                  | 8      |   |               |   | (5 | ) |
| CIPS    |   |                  | 1      |   |               |   | (1 | ) |
| Genco   |   |                  | 1      |   |               |   | (1 | ) |
| CILCORP |   |                  | 6      |   |               |   | (3 | ) |
| CILCO   |   |                  | 4      |   |               |   | (2 | ) |
| IP      |   |                  | 5      |   |               |   | (3 | ) |

|  | (a)   | Calculations      are based on an effective tax rate of38%. |
|--|-----------------|-------------------------------------------------------------|

----

|                                                                                                                                                                                                                                                        |   | Net      Income(a) |   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------|--------|
| Ameren                                                   |   | $                  | (17    | ) |
| UE                                                       |   |               | (8     | ) |
| Genco                                                    |   |               | (5     | ) |
| CILCO      (AERG)                                        |   |               | (2     | ) |
| EEI                                                      |   |               | (6     | ) |

| (a)   | Calculations      are based on an effective tax rate of38% |
|-----------------|------------------------------------------------------------|

----

|                                           |   | 2008   |   |   | 2009   |   |   |   | 2010 – 2012 |   |
|------------------------------------------------|--------|--------|--------|--------|--------|--------|--------|--------|-------------------|--------|
| Ameren:                                        |   |   |   |   |   |   |   |   |              |   |
| Coal                                           |   |   | 100    | %      |   |   | 87     | %      |              |   | 34 | % |
| Coal      transportation                       |   |   | 100    |   |   |   | 82     |   |              |   | 17 |   |
| Nuclear      fuel                              |   |   | 100    |   |   |   | 100    |   |              |   | 87 |   |
| Natural      gas for generation                |   |   | 38     |   |   |   | 1      |   |              |   | - |   |
| Natural      gas for distribution(a)           |   |   | 23     |   |   |   | 14     |   |              |   | 15 |   |
| Purchased      power for Illinois Regulated(b) |   |   | 97     |   |   |   | 80     |   |              |   | 51 |   |
| UE:                                            |   |   |   |   |   |   |   |   |              |   |   |   |
| Coal                                      |   |   | 100    | %      |   |   | 87     | %      |              |   | 38 | % |
| Coal      transportation                       |   |   | 100    |   |   |   | 96     |   |              |   | 31 |   |
| Nuclear      fuel                              |   |   | 100    |   |   |   | 100    |   |              |   | 87 |   |
| Natural      gas for generation                |   |   | 29     |   |   |   | -      |   |              |   | - |   |
| Natural      gas for distribution(a)           |   |   | 22     |   |   |   | 12     |   |              |   | 4 |   |
| CIPS:                                          |   |   |   |   |   |   |   |   |              |   |   |   |
| Natural      gas for distribution(a)           |   |   | 24     | %      |   |   | 16     | %      |              |   | 5 | % |
| Purchased      power(b)                        |   |   | 97     |   |   |   | 80     |   |              |   | 51 |   |
| Genco:                                         |   |   |   |   |   |   |   |   |              |   |   |   |
| Coal                                      |   |   | 100    | %      |   |   | 88     | %      |              |   | 25 | % |
| Coal      transportation                       |   |   | 100    |   |   |   | 98     |   |              |   | - |   |
| Natural      gas for generation                |   |   | 60     |   |   |   | -      |   |              |   | - |   |
| CILCORP/CILCO:                                 |   |   |   |   |   |   |   |   |              |   |   |   |
| Coal      (AERG)                          |   |   | 93     | %      |   |   | 82     | %      |              |   | 28 | % |
| Coal      transportation (AERG)                |   |   | 100    |   |   |   | 69     |   |              |   | - |   |
| Natural      gas for distribution(a)           |   |   | 21     |   |   |   | 12     |   |              |   | 21 |   |
| Purchased      power(b)                        |   |   | 97     |   |   |   | 80     |   |              |   | 51 |   |
| IP:                                            |   |   |   |   |   |   |   |   |              |   |   |   |
| Natural      gas for distribution(a)           |   |   | 24     | %      |   |   | 16     | %      |              |   | 15 | % |
| Purchased      power(b)                        |   |   | 97     |   |   |   | 80     |   |              |   | 51 |   |
| EEI:                                           |   |   |   |   |   |   |   |   |              |   |   |   |
| Coal                                           |   |   | 100    | %      |   |   | 88     | %      |              |   | 39 | % |
| Coal      transportation                       |   |   | 100    |   |   |   | 100    |   |              |   | - |   |

| (a)   | Represents      the percentage of natural gas price hedged for peak winter season of      November through March. The year 2008 represents January 2008 through      March 2008. The year 2009 represents November 2008 through March 2009.      This continues each successive year through March  2012. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Represents      the percentage of purchased power price-hedged for fixed-price residential      and small commercial customers with less than 1 megawatt of demand.      Includes the financial contracts that the Ameren Illinois Utilities      entered into with Marketing Company, effective August 28, 2007, and      additional financial contracts entered into with Marketing Company and      other suppliers, effective March 20, 2008, as part of the Illinois      electric settlement agreement. Larger customers are purchasing power from      the competitive markets. See Note 2 – Rate and Regulatory Matters and Note      9 – Commitments and Contingencies under Part I, Item 1, of this report for      a discussion of these financial contracts and the new power procurement      process pursuant to the Illinois electric settlement      agreement. |
|-----------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|              |   | Coal        |   |   | Transportation |   |
|-------------------|--------|-------------|--------|--------|----------------|--------|
|              |   | FuelExpense |   |   | NetIncome(a)   |   |   | FuelExpense |   |   | NetIncome(a) |   |
| Ameren(b)         |   | $           | 31     |   |           | $      | (19 | ) |   | $ | 21 |   |   | $ | (13 | ) |
| UE                |   |        | 12     |   |           |   | (8 | ) |   |   | 9 |   |   |   | (6 | ) |
| Genco             |   |        | 12     |   |           |   | (7 | ) |   |   | 5 |   |   |   | (3 | ) |
| CILCORP           |   |        | 5      |   |           |   | (3 | ) |   |   | 2 |   |   |   | (1 | ) |
| CILCO      (AERG) |   |        | 5      |   |           |   | (3 | ) |   |   | 2 |   |   |   | (1 | ) |
| EEI               |   |        | 2      |   |           |   | (1 | ) |   |   | 5 |   |   |   | (3 | ) |

| (a)   | Calculations      are based on an effective tax rate of38%. |
|-----------------|-------------------------------------------------------------|

| (b)   | Includes      amounts for Ameren registrant and nonregistrant    subsidiaries. |
|-----------------|--------------------------------------------------------------------------------|

|                                                                                                  |   | Ameren(a) |   |   | UE     |   |   | CIPS   |   |   | Genco  |   |   | CILCORP/CILCO |   |   | IP     |   |
|-------------------------------------------------------------------------------------------------------|--------|-----------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|---------------|--------|--------|--------|--------|
| Three      Months                                                                                     |   |      |   |   |   |   |   |   |   |   |   |   |   |          |   |   |   |   |
| Fair      value of contracts at beginning of period, net                                              |   | $         | 13     |   |   | $      | 7      |   |   | $      | 38     |   |   | $             | (4     | )      |   | $      | 21 |   |   | $ | 55 |   |
| Contracts      realized or otherwise settled during the period                                        |   |      | (5     | )      |   |   | (3     | )      |   |   | -      |   |   |          | -      |   |   |   | (1 | ) |   |   | 4 |   |
| Changes      in fair values attributable to changes in valuation technique and      assumptions  |   |      | -      |   |   |   | -      |   |   |   | -      |   |   |          | -      |   |   |   | - |   |   |   | - |   |
| Fair      value of new contracts entered into during the period                                       |   |      | 15     |   |   |   | (1     | )      |   |   | -      |   |   |          | 1      |   |   |   | - |   |   |   | (2 | ) |
| Other      changes in fair value                                                                      |   |      | (10    | )      |   |   | (4     | )      |   |   | 20     |   |   |          | (11    | )      |   |   | 20 |   |   |   | 45 |   |
| Fair      value of contracts outstanding at end of period, net                                        |   | $         | 13     |   |   | $      | (1     | )      |   | $      | 58     |   |   | $             | (14    | )      |   | $      | 40 |   |   | $ | 102 |   |

| (a)   | Includes      amounts for Ameren registrant and nonregistrant subsidiaries and      intercompany eliminations. |
|-----------------|----------------------------------------------------------------------------------------------------------------|

|   Sources      of Fair Value                                                                                                                                                                                                                                                                                                        |   | MaturityLess      than1      Year |   |   | Maturity1-3      Years |   |   | Maturity4-5      Years |   |   | Maturity      inExcess      of5      Years |   |   | TotalFair      Value |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------|--------|--------|------------------------|--------|--------|------------------------|--------|--------|--------------------------------------------|--------|--------|----------------------|--------|
| Ameren:                                                                                                                                                                                                                                                                                                                                       |   |                              |   |   |                   |   |   |                   |   |   |                                       |   |   |                 |   |
| Level      1                                                         |   | $                                 | (17    | )      |                   | $      | -      |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | (17 | ) |
| Level      2(a)                                                      |   |                              | (29    | )      |                   |   | -      |                   |   |   | -                                          |   |   |                 | -      |   |   |   | (29 | ) |
| Level      3(b)                                                      |   |                              | 35     |   |                   |   | 22     |                   |   |   | 2                                          |   |   |                 | -      |   |   |   | 59 |   |
| Total                                                                |   | $                                 | (11    | )      |                   | $      | 22     |                   |   | $      | 2                                          |   |   | $                    | -      |   |   | $ | 13 |   |

----

----

|   Sources      of Fair Value                                                                                                                                                                                                                                                                                                        |   | MaturityLess      than1      Year |   |   | Maturity1-3      Years |   |    | Maturity4-5      Years |   |   | Maturity      inExcess      of5      Years |   |   | TotalFair      Value |   |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------|--------|--------|------------------------|--------|---------|------------------------|--------|--------|--------------------------------------------|--------|--------|----------------------|--------|
| UE:                                                                                                                                                                                                                                                                                                                                           |   |                              |   |   |                   |   |    |                   |   |   |                                       |   |   |                 |   |   |   |   |   |   |
| Level      1                                                         |   | $                                 | (2     | )      |                   | $      | -       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | (2 | ) |
| Level      2(a)                                                      |   |                              | (14    | )      |                   |   | -       |                   |   |   | -                                          |   |   |                 | -      |   |   |   | (14 | ) |
| Level      3(b)                                                      |   |                              | 12     |   |                   |   | 3       |                   |   |   | -                                          |   |   |                 | -      |   |   |   | 15 |   |
| Total                                                                |   | $                                 | (4     | )      |                   | $      | 3       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | (1 | ) |
| CIPS:                                                                                                                                                                                                                                                                                                                                         |   |                              |   |   |                   |   |    |                   |   |   |                                       |   |   |                 |   |   |   |   |   |   |
| Level      1                                                         |   | $                                 | -      |   |                   | $      | -       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | - |   |
| Level      2(a)                                                      |   |                              | -      |   |                   |   | -  |                   |   |   | -                                          |   |   |                 | -      |   |   |   | - |   |
| Level      3(b)                                                      |   |                              | 17     |   |                   |   | 21      |                   |   |   | 20                                         |   |   |                 | -      |   |   |   | 58 |   |
| Total                                                                |   | $                                 | 17     |   |                   | $      | 21      |                   |   | $      | 20                                         |   |   | $                    | -      |   |   | $ | 58 |   |
| Genco:                                                                                                                                                                                                                                                                                                                                        |   |                              |   |   |                   |   |    |                   |   |   |                                       |   |   |                 |   |   |   |   |   |   |
| Level      1                                                         |   | $                                 | (15    | )      |                   | $      | -       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | (15 | ) |
| Level      2(a)                                                      |   |                              | -      |   |                   |   | -       |                   |   |   | -                                          |   |   |                 | -      |   |   |   | - |   |
| Level      3(b)                                                      |   |                              | 1      |   |                   |   | -       |                   |   |   | -                                          |   |   |                 | -      |   |   |   | 1 |   |
| Total                                                                |   | $                                 | (14    | )      |                   | $      | -       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | (14 | ) |
| CILCORP/CILCO:                                                                                                                                                                                                                                                                                                                                |   |                              |   |   |                   |   |    |                   |   |   |                                       |   |   |                 |   |   |   |   |   |   |
| Level      1                                                         |   | $                                 | -      |   |                   | $      | -       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | - |   |
| Level      2(a)                                                      |   |                              | -      |   |                   |   | -       |                   |   |   | -                                          |   |   |                 | -      |   |   |   | – |   |
| Level      3(b)                                                      |   |                              | 17     |   |                   |   | 14      |                   |   |   | 9                                          |   |   |                 | -      |   |   |   | 40 |   |
| Total                                                                |   | $                                 | 17     |   |                   | $      | 14      |                   |   | $      | 9                                          |   |   | $                    | -      |   |   | $ | 40 |   |
| IP:                                                                                                                                                                                                                                                                                                                                           |   |                              |   |   |                   |   |    |                   |   |   |                                       |   |   |                 |   |   |   |   |   |   |
| Level      1                                                         |   | $                                 | -      |   |                   | $      | -       |                   |   | $      | -                                          |   |   | $                    | -      |   |   | $ | - |   |
| Level      2(a)                                                      |   |                              | -      |   |                   |   | -       |                   |   |   | -                                          |   |   |                 | -      |   |   |   | - |   |
| Level      3(b)                                                      |   |                              | 33     |   |                   |   | 41      |                   |   |   | 28                                         |   |   |                 | -      |   |   |   | 102 |   |
| Total                                                                |   | $                                 | 33     |   |                   | $      | 41      |                   |   | $      | 28                                         |   |   | $                    | -      |   |   | $ | 102 |   |

| (a)   | Principally      fixed price for floating over-the-counter power swaps, power forwards and      fixed price for floating over-the-counter natural gas    swaps. |
|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (b)   | Principally      coal and SO2      option values based on a Black-Scholes model that includes information      from external sources and our estimates. Also includes interruptible power      forward and option contract values based on our  estimates. |
|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| (a)   | Evaluation      of Disclosure Controls andProcedures |
|-----------------|------------------------------------------------------|

| (b)   | Change      in Internal Controls |
|-----------------|----------------------------------|

----

|  Period                                                                                                                                                                                                                                                     |   | (a)      Total Numberof      Shares(or      Units) Purchased(a) |   |   | (b)      Average PricePaid      per Share(or      Unit) |   |   | (c)      Total Number of Shares (or Units) Purchased as Part of Publicly Announced      Plans or Programs |   |   | (d)      Maximum Number (or Approximate Dollar Value) of Shares (or Units) that May      Yet Be Purchased Under the Plans or Programs |   |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-----------------------------------------------------------------|--------|--------|---------------------------------------------------------|--------|--------|-----------------------------------------------------------------------------------------------------------|--------|--------|---------------------------------------------------------------------------------------------------------------------------------------|--------|
| January      1 – January 31, 2008                                                                                                                                                                                                                          |   |                                                            | 12,000 |   |                                                    | $      | 53.29  |                                                                                                      |   |   | -                                                                                                                                     |   |   |   | - |   |
| February      1 – February 29, 2008                                                                                                                                                                                                                        |   |                                                            | -      |   |                                                    |   | -      |                                                                                                      |   |   | -                                                                                                                                     |   |   |   | - |   |
| March      1 – March 31,      2008                                     |   |                                                            | 40,683 |   |                                                    |   | 42.70  |                                                                                                      |   |   | -                                                                                                                                     |   |   |   | - |   |
| Total                                                                        |   |                                                            | 52,683 |   |                                                    | $      | 45.11  |                                                                                                      |   |   | -                                                                                                                                     |   |   |   | - |   |

| (a)   | Included      in January were 12,000 shares of Ameren common stock purchased by Ameren      in open-market transactions pursuant to Ameren’s 2006 Omnibus Incentive      Compensation Plan in satisfaction of Ameren’s obligations for director      compensation awards. Included in March were 40,683 shares of Ameren common      stock purchased by Ameren from employee participants to satisfy      participants’ tax obligations incurred by the release of restricted shares      of Ameren common stock under Ameren’s Long-term Incentive Plan of 1998.      Ameren does not have any publicly announced equity securities repurchase      plans or programs. |
|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| Exhibit      Designation                                                      | Registrant(s) | Nature      of Exhibit                                                                                                                                                                                                                                                                                                          | Previously      Filed as Exhibit to:                               |
|-------------------------------------------------------------------------------|---------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------|
| Instruments      Defining Rights of Securities Holders, Including  Indentures |
| 4.1                                                                           | AmerenUE      | UE      Company Order dated April 8, 2008, establishing the 6.00% Senior Secured      Notes due 2018 (including the global note)                                                                                                                                                                                                | April      8, 2008 Form 8-K, Exhibits 4.3 and 4.5, File No. 1-2967 |
| 4.2                                                                           | AmerenUE      | Supplemental      Indenture dated as of April 1, 2008 by and between UE and The Bank of New      York, as Trustee under the Indenture of Mortgage and Deed of Trust dated      June 15, 1937, as amended, relating to UE First Mortgage Bonds, Senior      Notes Series LL securing UE 6.00% Senior Secured Notes due      2018 | April      8, 2008 Form 8-K, Exhibit 4.7, File No.1-2967           |

| 4.3                     | AmerenGenco              | Fifth      Supplemental Indenture dated as of April 1, 2008, between Genco and The      Bank of New York Trust Company, N.A., as Trustee, under the Indenture      dated as of November 1, 2000, relating to Genco 7.00% Senior Notes, Series      G due 2018, (including the form of notes)                                                     | April      9, 2008 Form 8-K, Exhibit 4.2, File No. 333-56594  |
|-------------------------|--------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------|
| 4.4                     | AmerenIP                 | IP      Company Order dated April 8, 2008, establishing the 6.25% Senior Secured      Notes due 2018 (including forms of global and definitive      notes)                                                                                                                                                                                       | April      8, 2008 Form 8-K, Exhibit 4.4, File No. 1-3004     |
| 4.5                     | AmerenIP                 | Supplemental      Indenture dated as of April 1, 2008 by and between IP and The Bank of New      York Trust Company, N.A., as Trustee, under the General Mortgage Indenture      and Deed of Trust dated as of November 1, 1992, relating to IP Mortgage      Bonds, Senior Notes Series CC securing IP 6.25% Senior Secured Notes due      2018 | April      8, 2008 Form 8-K, Exhibit 4.9, File No. 1-3004     |
| Material      Contracts |
| 10.1                    | AmerenGencoCILCORP       | Ameren      System Amended and Restated Non-Regulated Subsidiary Money Pool Agreement      dated March 1, 2008                                                                                                                                                                                                                                   |                                                          |
| 10.2                    | AmerenCIPSCILCORPCILCOIP | Amendment      dated as of March 26, 2008 to Credit Agreement – Illinois Facility, dated      as of July 14, 2006, among CIPS, CILCO, IP, AERG, CILCORP and JPMorgan      Chase Bank, N.A., as administrative agent                                                                                                                        | March      28, 2008 Form 8-K, Exhibit 10.1, File No. 1-14756  |
| 10.3                    | AmerenCIPSCILCORPCILCOIP | Amendment      dated as of March 26, 2008 to Credit Agreement – Illinois Facility, dated      as of February 9, 2007, among CIPS, CILCO, IP, AERG, CILCORP and JPMorgan      Chase Bank, N.A., as administrative agent                                                                                                                     | March      28, 2008 Form 8-K, Exhibit 10.2, File No. 1-14756  |
| 10.4                    | AmerenGenco              | Amended      and Restated Power Supply Agreement between Genco and Marketing Company,      dated March 28, 2008                                                                                                                                                                                                                                  | March      28, 2008 Form 8-K, Exhibit 10.3, File No.  1-14756 |

----

----

| Exhibit      Designation | Registrant(s) | Nature      of Exhibit | Previously      Filed as Exhibit to: |
|--------------------------|---------------|------------------------|--------------------------------------|

| Statement      re: Computation of Ratios |    |
|------------------------------------------|---------|
| 12.1                                     | Ameren  | Ameren’s      Statement of Computation of Ratio of Earnings to Fixed    Charges |   |
| 12.2                                     | UE      | UE’s      Statement of Computation of Ratio of Earnings to Fixed Charges and      Combined Fixed Charges and Preferred Stock Dividend      Requirements |   |
| 12.3                                     | CIPS    | CIPS’      Statement of Computation of Ratio of Earnings to Fixed Charges and      Combined Fixed Charges and Preferred Stock Dividend      Requirements |   |
| 12.4                                     | Genco   | Genco’s      Statement of Computation of Ratio of Earnings to Fixed    Charges |   |
| 12.5                                     | CILCORP | CILCORP’s      Statement of Computation of Ratio of Earnings to Fixed    Charges |   |

| 12.6                                           | CILCO   | CILCO’s      Statement of Computation of Ratio of Earnings to Fixed Charges and      Combined Fixed Charges and Preferred Stock Dividend      Requirements |   |
|------------------------------------------------|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| 12.7                                           | IP      | IP’s      Statement of Computation of Ratio of Earnings to Fixed Charges and      Combined Fixed Charges and Preferred Stock Dividend      Requirements    |   |
| Rule      13a-14(a) / 15d-14(a) Certifications |    |
| 31.1                                           | Ameren  | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      Ameren                                                                        |   |
| 31.2                                           | Ameren  | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      Ameren                                                                        |   |
| 31.3                                           | UE      | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      UE                                                                            |   |
| 31.4                                           | UE      | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      UE                                                                            |   |
| 31.5                                           | CIPS    | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      CIPS                                                                          |   |
| 31.6                                           | CIPS    | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      CIPS                                                                          |   |
| 31.7                                           | Genco   | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      Genco                                                                         |   |
| 31.8                                           | Genco   | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      Genco                                                                         |   |
| 31.9                                           | CILCORP | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      CILCORP                                                                       |   |
| 31.10                                          | CILCORP | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      CILCORP                                                                       |   |
| 31.11                                          | CILCO   | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      CILCO                                                                         |   |
| 31.12                                          | CILCO   | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      CILCO                                                                         |   |
| 31.13                                          | IP      | Rule      13a-14(a)/15d-14(a) Certification of Principal Executive Officer of      IP                                                                            |   |
| 31.14                                          | IP      | Rule      13a-14(a)/15d-14(a) Certification of Principal Financial Officer of      IP                                                                            |   |

----

----

| Exhibit      Designation | Registrant(s) | Nature      of Exhibit | Previously      Filed as Exhibit to: |
|--------------------------|---------------|------------------------|--------------------------------------|

| Section      1350 Certifications |    |
|----------------------------------|---------|
| 32.1                             | Ameren  | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of Ameren |   |
| 32.2                             | UE      | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of UE |   |
| 32.3                             | CIPS    | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of CIPS |   |
| 32.4                             | Genco   | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of Genco |   |
| 32.5                             | CILCORP | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of CILCORP |   |

| 32.6                     | CILCO              | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of CILCO   |                                                          |
|--------------------------|--------------------|----------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------|
| 32.7                     | IP                 | Section      1350 Certification of Principal Executive Officer and Principal Financial      Officer of IP      |                                                          |
| Additional      Exhibits |
| 99.1                     | AmerenCILCORPCILCO | Amended      and Restated Power Supply Agreement between AERG and Marketing Company,      dated March 28, 2008 | March      28, 2008 Form 8-K, Exhibit 99.1, File No.  2-95569 |

----

----