**Exhbit      12.4**

| **Ameren                Energy Generating Company****Computation                of Ratio of Earnings to Fixed Charges****(Thousands                of Dollars, Except Ratios)** |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                                                                                                                            |   |   |   |   |   |   |
|                                                                                                                                                                            |   |   |   |   |   |   |
|                                                                                                                                                                                 |   | **3                Months Ended** |   |   | **Year                Ended** |   |
|                                                                                                                                                                                 |   | **March                31,**  |   |   | **December                31,** |   |
|                                                                                                                                                                            |   | **2007** |   |   | **2006** |   |
| Net                income from continuing operations                                                                                                                            | $ | 42,901 |   | $ | 48,929 |   |
| Less-                Change in accounting principle                                                                                                                             |   | - |   |   | - |   |
| Less-                Income from equity investee                                                                                                                                |   | - |   |   | - |   |
| Add-                Taxes based on income                                                                                                                                       |   | 25,850 |   |   | 21,955 |   |
|                                                                                                                                                                            |   |   |   |   |   |   |
| Net                income before income taxes and change in accounting                principle                                                                                 |   | 68,751 |   |   | 70,884 |   |
|                                                                                                                                                                            |   |   |   |   |   |   |
| Add-                fixed charges:                                                                                                                                              |   |   |   |   |   |   |
| Interest                on long term debt                                                                                                                                       |   | 13,630 |   |   | 59,070 |   |
| Estimated                interest cost within rental expense                                                                                                                    |   | 32 |   |   | 107 |   |
| Amortization                of net debt premium, discount,and                expenses                                                                                           |   | 147 |   |   | 586 |   |
|                                                                                                                                                                            |   |   |   |   |   |   |
| Total                fixed charges                                                                                                                                              |   | 13,809 |   |   | 59,763 |   |
|                                                                                                                                                                            |   |   |   |   |   |   |
| Earnings                available for fixed charges                                                                                                                             | $ | 82,560 |   | $ | 130,647 |   |
|                                                                                                                                                                            |   |   |   |   |   |   |
| Ratio                of earnings to fixed charges                                                                                                                               |   | 5.97 |   |   | 2.18 |   |