Item 7.01 Regulation FD Disclosure
UniSource Energy Corporation is making presentations to investors and analysts on March 24, 2009. Copies of the presentation will be made available to such investors and analysts as early as March 23, 2009. The presentation will also be available at http://ir.uns.com/presentations.cfm, beginning on March 23, 2009. The presentation is attached hereto as Exhibit 99.1. Item 9.01 Financial Statements and Exhibits

Exhibit 99.1 UniSource Energy Corporation Presentation to Investors and Analysts

---