| **Ameren                Energy Generating Company****Computation                of Ratio of Earnings to Fixed Charges****(Thousands                of Dollars, Except Ratios)** |                              |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------|
|                                                                                                                                                                            |                              |   |   |   |   |
|                                                                                                                                                                            |                              |   |   |   |   |
|                                                                                                                                                                            | **6                Months Ended** |   |   | **Year                Ended** |   |
|                                                                                                                                                                            | **June                30,**       |   |   | **December                31,** |   |
|                                                                                                                                                                            | **2007**                          |   |   | **2006** |   |
| Net                income from continuing operations                                                                                                                            | $                                 | 60,571 |   |   | $ | 48,929 |   |
| Less-                Change in accounting principle                                                                                                                             |                              | - |   |   |   | - |   |
| Less-                Income from equity investee                                                                                                                                |                              | - |   |   |   | - |   |
| Add-                Taxes based on income                                                                                                                                       |                              | 36,498 |   |   |   | 21,955 |   |
| Net                income before income taxes and change in accounting                principle                                                                                 |                              | 97,069 |   |   |   | 70,884 |   |
|                                                                                                                                                                            |                              |   |   |   |   |   |   |
| Add-                fixed charges:                                                                                                                                              |                              |   |   |   |   |   |   |
| Interest                on long term debt                                                                                                                                       |                              | 27,625 |   |   |   | 59,070 |   |
| Estimated                interest cost within rental expense                                                                                                                    |                              | 62 |   |   |   | 107 |   |
| Amortization                of net debt premium, discount,     and                expenses                                                             |                              | 293 |   |   |   | 586 |   |
|                                                                                                                                                                            |                              |   |   |   |   |   |   |
| Total                fixed charges                                                                                                                                              |                              | 27,980 |   |   |   | 59,763 |   |
|                                                                                                                                                                            |                              |   |   |   |   |   |   |
| Earnings                available for fixed charges                                                                                                                             | $                                 | 125,049 |   |   | $ | 130,647 |   |
|                                                                                                                                                                            |                              |   |   |   |   |   |   |
| Ratio                of earnings to fixed charges                                                                                                                               |                              | 4.46 |   |   |   | 2.18 |   |
|                                                                                                                                                                            |                              |   |   |   |   |   |   |