Current Report

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): May 3, 2007


   
IRS Employer
Commission
Registrant; State of Incorporation;
Identification
File Number
Address; and Telephone Number
Number
     
1-13739
UNISOURCE ENERGY CORPORATION
(An Arizona Corporation)
One South Church Avenue, Suite 100
Tucson, AZ 85701
(520) 571-4000
86-0786732
     
1-5924
TUCSON ELECTRIC POWER COMPANY
(An Arizona Corporation)
One South Church Avenue, Suite 100
Tucson, AZ 85701
(520) 571-4000
86-0062700
 
    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:

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

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

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

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


Item 2.02  Results of Operations and Financial Condition

 
On May 3, 2007, UniSource Energy Corporation (“UniSource Energy”) issued a press release announcing earnings for the first quarter ended March 31, 2007 for UniSource Energy and Tucson Electric Power Company. A copy of the press release is attached hereto as Exhibit 99.
 
Item 9.01  Financial Statements and Exhibits
 
Exhibit 99  UniSource Energy Corporation Press Release, dated  May 3, 2007
 
 
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.
 

Date: May 3, 2007
 
 
UNISOURCE ENERGY CORPORATION
——————————————————
(Registrant)
 
 
/s/ Kevin P. Larson
 
 
——————————————————
Senior Vice President and Principal
Financial Officer
 
Date: May 3, 2007
 
 
TUCSON ELECTRIC POWER COMPANY
——————————————————
(Registrant)
 
 
/s/ Kevin P. Larson
 
 
——————————————————
Senior Vice President and Principal
Financial Officer