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                                                                                                             Exhibit 12

                                  TUCSON ELECTRIC POWER COMPANY
                        COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

                                            9 Months                            12 Months Ended
                                             Ended     ----------------------------------------------------------------
                                            Sep. 30,    Sep. 30,   Dec. 31,   Dec. 31,   Dec. 31,   Dec. 31,   Dec. 31,
                                              2002        2002       2001       2000       1999       1998       1997
-----------------------------------------------------------------------------------------------------------------------
                                                                         - Thousands of dollars -
<S>                                         <C>        <C>        <C>        <C>        <C>        <C>        <C>
Fixed Charges:
  Interest on Long-Term Debt                $ 42,649   $ 57,196   $ 61,218   $ 66,377   $ 66,836   $ 72,672   $ 66,247
  Other Interest(1)                            5,882      7,961      8,058      9,067     13,081     13,207      9,640
  Interest on Capital Lease Obligations(2)    65,726     87,807     90,348     92,658     82,414     81,823     83,019
-----------------------------------------------------------------------------------------------------------------------
Total Fixed Charges                          114,257    152,964    159,624    168,102    162,331    167,702    158,906


Net Income                                    42,099     60,528     75,284     51,169     73,475     41,676     83,572


Less:
  Extraordinary Income & Accounting
    Change - Net of Tax                            -          -        470          -     22,597          -          -
-----------------------------------------------------------------------------------------------------------------------
Net Income from Continuing Operations         42,099     60,528     74,814     51,169     50,878     41,676     83,572


Add (Deduct):
  Losses from Equity Investees                   279        431        700      1,543          -          -          -
  Income Taxes                                27,367     39,557     55,910     26,566     22,350     17,578    (22,104)
  Total Fixed Charges                        114,257    152,964    159,624    168,102    162,331    167,702    158,906
-----------------------------------------------------------------------------------------------------------------------

Total Earnings before Taxes and
  Fixed Charges                             $184,002   $253,480   $291,048   $247,380   $235,559   $226,956   $220,374
=======================================================================================================================

Ratio of Earnings to Fixed Charges             1.610      1.657      1.823      1.472      1.451      1.353      1.387

<FN>
 (1)  Excludes recognition of Allowance for Borrowed Funds Used During Construction.

 (2)  Amount has been restated for years ended 2001 - 2000 to conform to current year's presentation.


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