News Releases

Sierra Pacific Resources Names Treasurer

May 10, 2005

Sierra Pacific Resources (NYSE: SRP) today announced that William D. Rogers has been elected corporate treasurer and will join the company, effective June 8, 2005.

Rogers, 44, a Wall Street veteran who has been serving as managing director of debt capital markets for Merrill Lynch & Co. in New York since 2000, will be headquartered in Las Vegas, reporting to Michael Yackira, Sierra Pacific's executive vice president and chief financial officer.

"Bill Rogers brings a wealth of experience involving the financial markets and the energy business," Yackira said. "This, along with his leadership qualities, will bring immediate value to our company. After returning to profitability and strengthening our financial position during 2004, our next financial goal is to achieve investment grade status for our utilities and Bill will play a major role in that activity."

Rogers' principal responsibilities as head of treasury operations will be to optimize the company's capital structure and oversee all banking and credit relationships. Also reporting to him will be the financial planning and analysis and asset management functions.

Rogers was with JP Morgan Chase in New York from 1992 until 2000, serving as managing director of debt capital markets before joining Merrill Lynch. From 1989 to 1992, he was with Chase Securities in New York as an associate in merchant banking.

Rogers, who is a chartered financial analyst, holds an M.B.A. from the Fuqua School of Business at Duke University and a B.S. in engineering from the U.S. Military Academy at West Point, N.Y. From 1982 until 1987, he served on active duty with the U.S. Army Corps of Engineers in the United States and abroad.

Sierra Pacific Resources is a holding company whose principal subsidiaries are Nevada Power Company, the electric utility for most of southern Nevada, and Sierra Pacific Power Company, the electric utility for most of northern Nevada and the Lake Tahoe area of California. Sierra Pacific Power Company also distributes natural gas in the Reno-Sparks area of northern Nevada. Other subsidiaries include the Tuscarora Gas Pipeline Company, which owns a 50 percent interest in an interstate natural gas transmission partnership.

SOURCE: Sierra Pacific Resources

CONTACT: Media, Andrea Smith, +1-702-367-5843, Analyst, Britta Carlson,
+1-702-367-5624, both of Sierra Pacific Resources

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