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): February 22, 2005


                                                            IRS Employer
Commission      Registrant; State of Incorporation;         Identification
File Number     Address; and Telephone Number               Number
-----------     ----------------------------------          --------------------

1-13739         UNISOURCE ENERGY CORPORATION                86-0786732
                (An Arizona Corporation)
                One South Church Avenue, Suite 100
                Tucson, AZ 85701
                (520) 571-4000

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

     Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

     |_| Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)

     |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
CFR 240.14a-12)

     |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))

     |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))





ITEM 8.01 - OTHER EVENTS
------------------------

     On February 22, 2005, UniSource Energy Corporation ("UniSource Energy")
announced its intention to offer, subject to market and other conditions, up to
$125 million aggregate principal amount of Convertible Senior Notes due 2035
through a domestic offering to qualified institutional buyers pursuant to Rule
144A under the Securities Act of 1933 (the "Act") and to persons in offshore
transactions in reliance on Regulation S under the Act. A copy of the press
release announcing the intention to offer such securities is included as Exhibit
99.1 hereto and incorporated by reference into this Item 8.01.

     This Current Report on Form 8-K is neither an offer to sell nor a
solicitation of an offer to buy any of these securities.

     The securities have not been registered under the Act or any state
securities laws, and unless so registered, may not be offered or sold in the
United States except pursuant to an exemption from the registration requirements
of the Act and applicable state laws.


ITEM 9.01 - FINANCIAL STATEMENTS AND EXHIBITS
---------------------------------------------

     Exhibit 99.1           UniSource Energy Corporation Press Release, dated
                            February 22, 2005





                                   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 hereunto duly authorized.







 
Date: February 22, 2005                        UNISOURCE ENERGY CORPORATION
                                          --------------------------------------
                                                      (Registrant)


                                                  /s/ Kevin P. Larson
                                          --------------------------------------
                                               Vice President and Principal
                                                    Financial Officer


Date: February 22, 2005                       TUCSON ELECTRIC POWER COMPANY
                                          --------------------------------------
                                                      (Registrant)


                                                   /s/ Kevin P. Larson
                                          --------------------------------------
                                               Vice President and Principal
                                                    Financial Officer