Exhibit 99




                         UNISOURCE ENERGY CORPORATION


                         TUCSON ELECTRIC POWER COMPANY
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                       STATEMENTS OF CORPORATE OFFICERS
          (Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)

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     Each of the undersigned, James S. Pignatelli, Chairman of the Board,
President and Chief Executive Officer of UniSource Energy Corporation and
Tucson Electric Power Company (each a "Company"), and Kevin P. Larson, Vice
President, Treasurer and Chief Financial Officer of each Company, hereby
certifies, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that
each Company's Quarterly Report on Form 10-Q for the quarter ended September
30, 2002, fully complies with the requirements of Section 13(a) of the
Securities Exchange Act of 1934, as amended, and that the information
contained therein fairly presents, in all material respects, the financial
condition and results of operation of such Company.


November 14, 2002

                                 /s/ James S. Pignatelli
                                -------------------------------------
                                     James S. Pignatelli
                                Chairman of the Board, President and
                                    Chief Executive Officer
                                   UniSource Energy Corporation
                                   Tucson Electric Power Company


                                 /s/ Kevin P. Larson
                                -------------------------------------
                                     Kevin P. Larson
                                Vice President, Treasurer and
                                    Chief Financial Officer
                                   UniSource Energy Corporation
                                   Tucson Electric Power Company