| **Ameren                  Energy Generating Company****Computation                  of Ratio of Earnings to Fixed Charges****(Thousands                  of Dollars, Except Ratios)** |                                |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------|
|                                                                                                                                                                                  |                                |   |   |   |   |
|                                                                                                                                                                                  |                                |   |   |   |   |
|                                                                                                                                                                                  | **9                  Months Ended** |   |   | **Year                  Ended** |   |
|                                                                                                                                                                                  | **September                  30,**  |   |   | **December                  31,** |   |
|                                                                                                                                                                                  | **2007**                            |   |   | **2006** |   |
| Net                  income from continuing operations                                                                                                                                | $                                   | 83,855 |   |   | $ | 48,929 |   |
| Less-                  Change in accounting principle                                                                                                                                 |                                | - |   |   |   | - |   |
| Less-                  Income from equity investee                                                                                                                                    |                                | - |   |   |   | - |   |
| Add-                  Taxes based on income                                                                                                                                           |                                | 52,306 |   |   |   | 21,955 |   |
|                                                                                                                                                                                  |                                |   |   |   |   |   |   |
| Net                  income before income taxes and change in accounting                  principle                                                                                   |                                | 136,161 |   |   |   | 70,884 |   |
|                                                                                                                                                                                  |                                |   |   |   |   |   |   |
| Add-                  fixed charges:                                                                                                                                                  |                                |   |   |   |   |   |   |
| Interest                  on long term debt                                                                                                                                           |                                | 42,062 | (1) |   |   | 59,070 |   |
| Estimated                  interest cost within rental expense                                                                                                                        |                                | 106 |   |   |   | 107 |   |
| Amortization                  of net debt premium, discount,and                  expenses                                                                                             |                                | 440 |   |   |   | 586 |   |
|                                                                                                                                                                                  |                                |   |   |   |   |   |   |
| Total                  fixed charges                                                                                                                                                  |                                | 42,608 |   |   |   | 59,763 |   |
|                                                                                                                                                                                  |                                |   |   |   |   |   |   |
| Earnings                  available for fixed charges                                                                                                                                 | $                                   | 178,769 |   |   | $ | 130,647 |   |
|                                                                                                                                                                                  |                                |   |   |   |   |   |   |
| Ratio                  of earnings to fixed charges                                                                                                                                   |                                | 4.19 |   |   |   | 2.18 |   |