**Exhibit 12(b)**

**BALTIMORE GASAND ELECTRIC COMPANY AND SUBSIDIARIES**

**COMPUTATION OFRATIO OF EARNINGS TO FIXED CHARGES ANDCOMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES ANDPREFERRED AND PREFERENCE DIVIDEND REQUIREMENTS**
| ** **                                                                                      | ** ** | **12 Months Ended** | ** ** |
|-------------------------------------------------------------------------------------------------|------------|-------------------------------|------------|
| ** **                                                                                      | ** ** | **December  2006**            | ** ** | **December  2005** | ** ** | **December  2004** | ** ** | **December  2003** | ** ** | **December  2002** | ** ** |
| ** **                                                                                      | ** ** | **(In millions)**        | ** ** |
| Income from Continuing  Operations (Before Extraordinary Loss)                             | ** ** | **$**                         | **170.3**  |   | $ | 189.0 |   | $ | 166.3 |   | $ | 163.2 |   | $ | 143.1 |   |
| Taxes on Income                                                                                 | ** ** | **102.2**                     |       | 119.9 |   | 102.5 |   | 105.2 |   | 93.3 |   |
| Adjusted Income                                                                                 | ** ** | **$**                         | **272.5**  |   | $ | 308.9 |   | $ | 268.8 |   | $ | 268.4 |   | $ | 236.4 |   |
| Fixed Charges:                                                                                  |       |                          |       |   |   |   |   |   |   |   |   |
| Interest and  Amortization of Debt Discount and Expense and Premium on all Indebtedness         | ** ** | **$**                         | **104.6**  |   | $ | 95.6 |   | $ | 97.3 |   | $ | 112.8 |   | $ | 142.1 |   |
| Interest Factor  in Rentals                                                                     | ** ** | **0.3**                       |       | 0.3 |   | 0.5 |   | 0.7 |   | 0.5 |   |
| Total Fixed  Charges                                                                            | ** ** | **$**                         | **104.9**  |   | $ | 95.9 |   | $ | 97.8 |   | $ | 113.5 |   | $ | 142.6 |   |
| Preferred and  Preference Dividend Requirements: (1)                                            |       |                          |       |   |   |   |   |   |   |   |   |
| Preferred and  Preference Dividends                                                             | ** ** | **$**                         | **13.2**   |   | $ | 13.2 |   | $ | 13.2 |   | $ | 13.2 |   | $ | 13.2 |   |
| Income Tax  Required                                                                            | ** ** | **8.0**                       |       | 8.4 |   | 8.1 |   | 8.6 |   | 8.6 |   |
| Total Preferred  and Preference Dividend Requirements                                           | ** ** | **$**                         | **21.2**   |   | $ | 21.6 |   | $ | 21.3 |   | $ | 21.8 |   | $ | 21.8 |   |
| Total Fixed Charges and  Preferred and Preference Dividend Requirements                         | ** ** | **$**                         | **126.1**  |   | $ | 117.5 |   | $ | 119.1 |   | $ | 135.3 |   | $ | 164.4 |   |
| Earnings (2)                                                                                    | ** ** | **$**                         | **377.4**  |   | $ | 404.8 |   | $ | 366.6 |   | $ | 381.9 |   | $ | 379.0 |   |
| Ratio of Earnings to  Fixed Charges                                                             | ** ** | **3.60**                      |       | 4.22 |   | 3.75 |   | 3.36 |   | 2.66 |   |
| Ratio of Earnings to Combined Fixed Charges and Preferred and  Preference Dividend Requirements | ** ** | **2.99**                      |       | 3.45 |   | 3.08 |   | 2.82 |   | 2.31 |   |

 

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(1)   Preferred and preference dividend requirementsconsist of an amount equal to the pre-tax earnings that would be required tomeet dividend requirements on preferred stock and preference stock.

(2)   Earnings are deemed to consist of income fromcontinuing operations (before extraordinary loss) that includes earnings of BGE’sconsolidated subsidiaries, income taxes (including deferred income taxes andinvestment tax credit adjustments), and fixed charges other than capitalizedinterest.

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