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UniSource Energy's primary subsidiaries include Tucson Electric Power (TEP), which serves nearly 400,000 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, grows at approximately 2 percent annually; more than double the national average.
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, with customer bases expanding by approximately 3 percent a year. Both utilities have incorporated these dynamic growth rates into their planning to ensure that their systems are ready to serve customers' needs both today and tomorrow.
2008 Annual Meeting Materials
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