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UniSource Energy's primary subsidiaries include Tucson Electric Power (TEP), which serves more than 397,000 customers in southern Arizona; and UniSource Energy Services (UES), a utility that delivers natural gas and electric service to more than 236,000 customers across Arizona.
TEP, the second largest investor-owned electric utility in Arizona, is the principal operating subsidiary of UniSource Energy. Over 80 percent of TEP's energy needs are supplied by low-cost, coal-fired generating plants. TEP's retail customer base, which includes the Tucson metropolitan area, has a historical growth rate of approximately 2%, but has slowed recently due to general economic conditions.
UES' operating companies, UNS Gas and UNS Electric, are distribution companies that provide gas and electric service to over 30 communities in some of the fastest growing areas in Arizona.
2008 Annual Meeting Materials
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