| **Ameren                Corporation****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                                                                                                              | $ | 122,604 |   | $ | 546,738 |   |
| Less-                Change in accounting principle                                                                                                               |   | - |   |   | - |   |
| Less-                Minority interest                                                                                                                            |   | (6,795 | ) |   | (27,135 | ) |
| Add-                Taxes based on income                                                                                                                         |   | 71,604 |   |   | 283,825 |   |
| Net                income before income taxes, change in accounting principle, and minority                interest                                               |   | 201,003 |   |   | 857,698 |   |
|                                                                                                                                                              |   |   |   |   |   |   |
| Add-                fixed charges:                                                                                                                                |   |   |   |   |   |   |
| Interest                on long term debt                                                                                                                         |   | 99,553 |   |   | 345,410 |   |
| Estimated                interest cost within rental expense                                                                                                      |   | 1,210 |   |   | 4,081 |   |
| Amortization                of net debt premium, discount,and                expenses                                                                             |   | 4,968 |   |   | 15,341 |   |
| Subsidiary                preferred stock dividends                                                                                                               |   | 2,726 |   |   | 10,936 |   |
| Adjust                preferred stock dividends to pre-taxbasis                                                                                                   |   | 1,557 |   |   | 5,565 |   |
| Total                fixed charges                                                                                                                                |   | 110,014 |   |   | 381,333 |   |
| Less:                Adjustment of preferred stock dividends to pre-tax basis                                                                                     |   | 1,557 |   |   | 5,565 |   |
|                                                                                                                                                              |   |   |   |   |   |   |
| Earnings                available for fixed charges                                                                                                               | $ | 309,460 |   | $ | 1,233,466 |   |
|                                                                                                                                                              |   |   |   |   |   |   |
| Ratio                of earnings to fixed charges                                                                                                                 |   | 2.81 |   |   | 3.23 |   |