**CERTIFICATION**

**Pursuant      to      Section 302 of the Sarbanes-Oxley Act**

| 1. | I                have                reviewed the quarterly report on Form 10-Q for the year ended March                31,                2006 of Tucson Electric Power                Company; |
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| 2. | Based                on my                knowledge, this quarterly report does not contain any untrue statement                of                a material fact or omit to state a material fact necessary to make                the                statements made, in light of the circumstances under which such statements                were made, not misleading with respect to the period covered by this                quarterly report; |
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| 3. | Based                on my                knowledge, the financial statements, and other financial information                included in this quarterly report, fairly present in all material                respects                the financial condition, results of operations and cash flows of                the                registrant as of, and for, the periods presented in this quarterly                report; |
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| 4. | The                registrant’s other certifying officers and I are responsible for                establishing and maintaining disclosure controls and procedures (as                defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant                and have: |
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|   | a. | designed                    such                    disclosure controls and procedures, or caused such disclosure                    controls and                    procedures to be designed under our supervision, to ensure that                    material                    information relating to the registrant, including its consolidated                    subsidiaries, is made known to us by others within those entities,                    particularly during the period in which this quarterly report                    is being                    prepared; |
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|   | b. | evaluated                the                effectiveness of the registrant’s disclosure controls and procedures and                presented in this report our conclusions about the effectiveness                of the                disclosure controls and procedures, as of the end of the period covered                by                this quarterly report based on such evaluation;                and |
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|   | c. | disclosed                    in                    this quarterly report any change in the registrant’s internal control over                    financial reporting that occurred during the registrant’s fourth fiscal                    quarter that has materially affected, or is reasonably likely                    to                    materially affect, the registrant’s internal control over financial                    reporting; and |
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| 5. | The                registrant’s other certifying officer and I have disclosed, based on our                most recent evaluation of internal control over financial reporting,                to                the registrant’s auditors and the audit committee of the registrant’s                board of directors (or persons performing the equivalent                functions): |
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|   | a. | all                significant deficiencies and material weaknesses in the design or                operation of internal control over financial reporting which are                reasonably likely to adversely affect the registrant’s ability to record,                process, summarize and report financial information;                and |
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|   | b. | any                fraud,                whether or not material, that involves management or other employees                who                have a significant role in the registrant’s internal control over                financial reporting. |
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| Date:  | May                    5,                    2006 | /s/  James                    S.                    Pignatelli                     |
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|   |                                              |    James                    S.                    Pignatelli   Chairman,                    President,                    and Chief Executive Officer              |