| Central      Illinois Light CompanyComputation      of Ratios of Earnings to Fixed Charges and CombinedFixed      Charges and Preferred Stock Dividend Requirements(Thousands      of Dollars, Except Ratios) |                      |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------|
|                                                                                                                                                                                                          |                      |   |   |   |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |
|                                                                                                                                                                                                          | 9      Months Ended  |   |   | Year      Ended  |   |
|                                                                                                                                                                                                          | September      30,        |   |   | December      31, |   |
|                                                                                                                                                                                                          | 2008                      |   |   | 2007 |   |
| Net      income from continuing operations                                                                                                                                                                    | $                         | 61,671 |   |   | $ | 75,984 |   |
| Add-      Taxes based on income                                                                                                                                                                               |                      | 34,037 |   |   |   | 39,195 |   |
| Net      income before income taxes                                                                                                                                                                           |                      | 95,708 |   |   |   | 115,179 |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |   |   |
| Add-      fixed charges:                                                                                                                                                                                      |                      |   |   |   |   |   |   |
| Interest on long term      debt  (1)                                                                                                                                                                |                      | 14,665 |   |   |   | 26,071 |   |
| Estimated      interest cost within rental expense                                                                                                                                                            |                      | 270 |   |   |   | 343 |   |
| Amortization      of net debt premium, discount,and      expenses                                                                                                                                             |                      | 834 |   |   |   | 1,065 |   |
| Total      fixed charges                                                                                                                                                                                      |                      | 15,769 |   |   |   | 27,479 |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |   |   |
| Earnings      available for fixed charges                                                                                                                                                                     |                      | 111,477 |   |   |   | 142,658 |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |   |   |
| Ratio      of earnings to fixed charges                                                                                                                                                                       |                      | 7.06 |   |   |   | 5.19 |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |   |   |
| Earnings      required for combined fixedcharges      and preferred stock dividends:                                                                                                                          |                      |   |   |   |
| Preferred      stock dividends                                                                                                                                                                                |                      | 1,136 |   |   |   | 1,869 |   |
| Adjustment      to pre-tax basis                                                                                                                                                                              |                      | 627 |   |   |   | 977 |   |
|                                                                                                                                                                                                          |                      | 1,763 |   |   |   | 2,846 |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |   |   |
| Combined      fixed charges and preferred stockdividend      requirements                                                                                                                                     | $                         | 17,532 |   |   | $ | 30,325 |   |
|                                                                                                                                                                                                          |                      |   |   |   |   |   |   |
| Ratio      of earnings to combined fixed chargesand      preferred stock dividend requirements                                                                                                                |                      | 6.35 |   |   |   | 4.70 |   |