UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                          Washington, D. C.  20549

                                 FORM 8-K

                               CURRENT REPORT

   Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934



     Date of Report (Date of Earliest Event Reported):  April 26, 2003



Commission        Registrant; State of Incorporation;     IRS Employer
File Number       Address; and Telephone Number           Identification Number
- -----------       -----------------------------------     ---------------------
1-13739           UNISOURCE ENERGY CORPORATION            86-0786732
                  (An Arizona Corporation)
                  One South Church, Suite 100
                  Tucson, AZ  85701
                  (520) 571-4000


1-5924            TUCSON ELECTRIC POWER COMPANY           86-0062700
                  (An Arizona Corporation)
                  One South Church, Suite 100
                  Tucson, AZ  85701
                  (520) 571-4000




Item 9.  Regulation FD Disclosure
- ---------------------------------

     The information in this report is being furnished pursuant to Item 12
"Disclosure of Results of Operations and Financial Condition."

     On April 26, 2003, UniSource Energy Corporation (UniSource Energy)
issued a press release announcing first quarter 2003 earnings for UniSource
Energy and Tucson Electric Power Company.  A copy of the press release is
attached as Exhibit 99.


Item 7.  Financial Statements and Exhibits
- ------------------------------------------

Exhibit 99   UniSource Energy Corporation Press Release, dated April 26, 2003.

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                           SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of 1934,
each registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.  The signature for each
undersigned company shall be deemed to relate only to matters having
reference to such company or its subsidiary.


                                     UNISOURCE ENERGY CORPORATION
                                     ----------------------------
                                             (Registrant)


Date: April 28, 2003                    /s/  Kevin P. Larson
                                     ----------------------------
                                             Kevin P. Larson
                                     Vice President and Principal
                                           Financial Officer



                                     TUCSON ELECTRIC POWER COMPANY
                                     -----------------------------
                                             (Registrant)


Date: April 28, 2003                    /s/  Kevin P. Larson
                                     -----------------------------
                                             Kevin P. Larson
                                      Vice President and Principal
                                           Financial Officer

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