| Sierra Pacific Resources (SPR) operates as the holding company for Nevada Power Company (NPC) and Sierra Pacific Power Company (SPPC). The company, through NPC, engages in the distribution, transmission, generation, and sale of electric energy in Clark County in southern Nevada. NPC provided electricity to approximately 738,000 customers in the communities of Las Vegas, north Las Vegas, Henderson, Searchlight, Laughlin, and adjoining areas, including Nellis air force base, as of December 31, 2004. NPC also provides services to the Department of Energys Nevada test site in Nye County. SPPC provided electricity to approximately 342,600 customers in an approximately 50,000 square mile service area in western, central, and northeastern Nevada, including the cities of Reno, Sparks, Carson, and Elko; and a portion of eastern California, including the Lake Tahoe area, as of December 31, 2004. SPPC also distributed natural gas in Nevada to approximately 134,800 customers in an area of approximately 600 square miles in Reno/Sparks and environs, as of the above date. In addition, the company, through a partnership, operates an interstate natural gas pipeline from Malin, Oregon to Reno, Nevada. Sierra Pacific Resources is headquartered in Reno, Nevada. |