UniSource Energy Announces First Quarter 2005 Earnings Conference Call

    Business Editors/Energy Editors

    TUCSON, Ariz.--(BUSINESS WIRE)--April 28, 2005--UniSource Energy Corp. (NYSE: UNS) officials will discuss the company's first quarter 2005 earnings during a conference call that will be available live on the Internet. James S. Pignatelli, UniSource Energy chairman, president and chief executive officer, and Kevin Larson, vice president and chief financial officer, will host the call.
    UniSource Energy expects to release its first quarter earnings on Thursday, May 5. That release will be available at www.UniSourceEnergy.com. The conference call is scheduled for later that same day, beginning at 2 p.m. EDT.

    Telephone Access

    To listen to the live conference call, dial 877-582-0446 five to 10 minutes prior to the event and reference confirmation code 5959422. A telephone replay will be available for seven days starting May 5. To listen to the replay, dial 800-642-1687 and reference confirmation code 5959422.

    Internet Access

    A live audio-only webcast of the conference call is available through a link at www.UniSourceEnergy.com. Listeners are encouraged to visit the Web site at least 30 minutes before the event to register, download and install any necessary audio software. A recording of the webcast will be available for 30 days through a link at www.UniSourceEnergy.com.
    UniSource Energy's primary subsidiaries include Tucson Electric Power Co., which serves more than 370,000 customers in southern Arizona; UniSource Energy Services, provider of natural gas and electric service for more than 206,000 customers in northern and southern Arizona; and Millennium Energy Holdings, parent company of UniSource Energy's unregulated energy businesses. For more information about UniSource Energy and its subsidiaries, visit www.UniSourceEnergy.com.

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CONTACT: UniSource Energy Corp., Tucson Joe Salkowski, 520-884-3625 (Media) Jo Smith, 520-884-3650 (Financial Analyst)

KEYWORD: ARIZONA INDUSTRY KEYWORD: UTILITIES CONFERENCE CALLS SOURCE: UniSource Energy Corp.

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