| Tucson      Electric Power Company                                                                      |
|---------------------------------------------------------------------------------------------------------|
| Computation      of Ratio of Earnings to Fixed Charges                                                  |
|                                                                                                    |   |   |   |   |   |   |   |
|                                                                                                    |   |   |   |   |   |   |   |
|                                                                                                    |   |   |   |   |   |   |   |
|                                                                                                    | 6 Months      Ended | 12 Months      Ended | 12 Months      Ended |   |
|                                                                                                    | Jun.      30, | Jun.      30, | Dec.      31, | Dec.      31, | Dec.      31, | Dec.      31, | Dec.      31, |
|                                                                                                    | 2008 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 |
|                                                                                                    |   |   |   |  -      Thousands of Dollars - |   |
|                                                                                                    |   |   |   |   |   |   |   |
| Fixed      Charges:                                                                                     |   |   |   |   |   |   |   |
|                                                                                                    |   |   |   |   |   |   |   |
|   Interest      on Long-Term Debt                                                             |  $            24,337 |  $            49,453 |  $            50,230 |  $  51,422 |  $  56,243 |  $  69,904 |  $  76,585 |
|   Other      Interest (1)                                                                     | 1,469 | 3,048 | 4,538 | 6,436 | 2,597 | 1,263 | 1,820 |
|   Interest      on Capital Lease Obligations                                                  | 28,655 | 60,867 | 64,477 | 72,556 | 79,064 | 85,869 | 84,053 |
| Total      Fixed Charges                                                                                |  $            54,461 |  $          113,368 |  $          119,245 |  $130,414 |  $137,904 |  $157,036 |  $162,458 |
|                                                                                                    |   |   |   |   |   |   |   |
| Net      (Loss) Income                                                                                  | (3,098) | 37,267 | 53,456 | 66,745 | 48,267 | 46,127 | 128,913 |
|                                                                                                    |   |   |   |   |   |   |   |
| Less:                                                                                                   |   |   |   |   |   |   |   |
|    Cumulative      Effect of Accounting Change -                                         |   |   |   |   |   |   |   |
|        Net      of Tax                                               |                        - |                        - |                        - |              - |          (626) |              - | 67,471 |
| Net      Income/(Loss) from Continuing Operations                                                       | (3,098) | 37,267 | 53,456 | 66,745 | 48,893 | 46,127 | 61,442 |
|                                                                                                    |   |   |   |   |   |   |   |
| Add      (Deduct):                                                                                      |   |   |   |   |   |   |   |
|   (Income)      Losses from Equity Investees (2)                                              | 0 | 0 |                        - | (320) | (314) | (131) | (76) |
|   Income      Taxes                                                                           | (530) | 25,577 | 35,542 | 42,478 | 33,907 | 34,815 | 21,090 |
|   Total      Fixed Charges                                                                    | 54,461 | 113,368 | 119,245 | 130,414 | 137,904 | 157,036 | 162,458 |
|                                                                                                    |   |   |   |   |   |   |   |
| Total      Earnings before Taxes                                                                        |   |   |   |   |   |   |   |
| and      Fixed Charges                                                                                  |  $            50,833 |  $          176,212 |  $          208,243 |  $239,317 |  $220,390 |  $237,847 |  $244,914 |
|                                                                                                    |   |   |   |   |   |   |   |
|                                                                                                    |   |   |   |   |   |   |   |
| Ratio      of Earnings to Fixed Charges                                                                 | 0.933 | 1.554 | 1.746 | 1.835 | 1.598 | 1.515 | 1.508 |
|                                                                                                    |   |   |   |   |   |   |   |
|                                                                                                    |   |   |   |   |   |   |   |
| (1)  Excludes      recognition of Allowance for Borrowed Funds Used During      Construction. |   |   |   |   |   |
| (2)  Truepricing      and Inncom (Income) Losses.                                             |   |   |   |   |   |   |   |