EXHIBIT 12



COMPUTATION IN SUPPORT OF RATIO OF EARNINGS TO FIXED CHARGES

For Years Ended December 31

(Dollar Amounts in Thousands)



|                                                         |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|-------------------------------------------------------- |  | ------------------------------------------------------ | -------- | -- | ---- | - | -------- | ---- |  | - | ------- | - |  | ---------------------------------------------------------------- | ------- | -- |  | - | ------ | -
|                                                         |  | Allegheny Energy Supply Company, LLC, and Subsidiaries |         
|                                                         |  | 2003                                                   |          |    | 2002 |   |          | 2001 |  |   | 2000    |   |  | FromNovember 18, 1999 (Inception Date) through December 31, 1999 |        
|Earnings:                                                |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|(Loss) income from continuing operations                 |  | $                                                      | (466,101 | )* |      | $ | (579,465 | )**  |  | $ | 239,884 | * |  | $                                                                | 77,996  | ** |  | $ | 9,532  |  
|Fixed charges (see below)                                |  |                                                        | 300,864  |    |      |   | 164,739  |      |  |   | 116,251 |   |  |                                                                  | 39,505  |    |  |   | 2,378  |  
|Income taxes                                             |  |                                                        | (319,711 | )* |      |   | (362,513 | )**  |  |   | 124,953 | * |  |                                                                  | 36,081  | ** |  |   | 2,503  |  
|Amortization of capitalized interest                     |  |                                                        | 1,592    |    |      |   | 1,399    |      |  |   | 213     |   |  |                                                                  | 110     |    |  |   | 7      |  
|Income distributions of equity investees                 |  |                                                        |         |    |      |   |         |      |  |   |        |   |  |                                                                  | 7,200   |    |  |   |       |  
|Less: capitalized interest                               |  |                                                        | (15,394  | )  |      |   | (10,025  | )    |  |   | (7,506  | ) |  |                                                                  | (4,337  | )  |  |   | (212   | )
|Less: loss (income) from unconsolidated equity investees |  |                                                        | 1,619    |    |      |   |         |      |  |   |         |   |  |                                                                  | (5,665  | )  |  |   |       |  
|                                                         |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|Total Earnings (as defined)                              |  | $                                                      | (497,131 | )  |      | $ | (785,865 | )    |  | $ | 473,795 |   |  | $                                                                | 150,890 |    |  | $ | 14,208 |  
|                                                         |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|Fixed Charges:                                           |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|Interest expensed and capitalized                        |  | $                                                      | 297,356  |    |      | $ | 159,710  |      |  | $ | 110,991 |   |  | $                                                                | 37,795  |    |  | $ | 2,305  |  
|Estimated interest component of rental expense           |  |                                                        | 3,508    |    |      |   | 5,029    |      |  |   | 5,260   |   |  |                                                                  | 1,710   |    |  |   | 73     |  
|                                                         |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|Total Fixed Charges (as defined)                         |  | $                                                      | 300,864  |    |      | $ | 164,739  |      |  | $ | 116,251 |   |  | $                                                                | 39,505  |    |  | $ | 2,378  |  
|                                                         |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  
|Ratio of Earnings to Fixed Charges                       |  |                                                        | (A       | )  |      |   | (A       | )    |  |   | 4.08    |   |  |                                                                  | 3.82    |    |  |   | 5.97   |  
|                                                         |  |                                                        |          |    |      |   |          |      |  |   |         |   |  |                                                                  |         |    |  |   |        |  

---

|* |  | Excludes minority interest and the cumulative effect of accounting change(s).
|- |  | -----------------------------------------------------------------------------

|** |  | Excludes minority interest.
|-- |  | ---------------------------

|(A) |  | For the year ended December 31, 2003 and 2002, there is a deficiency of earnings to cover the fixed charges of $797,995 and $950,604, respectively.
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