AUSTIN, TX – December 2, 2002 – Nevada Power Company, a subsidiary of Sierra Pacific Resources (NYSE: SRP) has entered into an agreement with Desert Queen Wind Limited Partnership, an affiliate of Cielo Wind Power LLC of Austin, Texas, to purchase the power produced by an 80-megawatt wind power project to be constructed by Desert Queen Wind Limited Partnership in Clark County, Nevada.

Cielo’s Desert Queen Wind Ranch™ will be one of Nevada’s first commercial-scale wind power projects. The project will generate enough power to provide the average annual electricity needs for as many as 50,000 homes. The project, located entirely on Bureau of Land Management lands, will be completed by the end of 2004.

“We are pleased to be working with Nevada Power Company to provide a clean and renewable energy source to the people of Nevada,” said Walter Hornaday, president of Cielo Wind Power. “By choosing wind power, Nevada Power Company is showing their commitment to improving environmental conditions.”

Cielo Wind Power, LLC develops, maintains and assists with the construction of utility-grade wind power projects. With field offices in McCamey and White Deer, Texas, Austin-based Cielo Wind Power is the largest wind developer in the Southwest and is dedicated solely to cost-effective and environmentally responsible wind project development. Cielo Wind Power is a privately held company. For more information about Cielo, go to www.cielowind.com.