Media Contact: Karl Walquist (775) 834-3891
Analyst Contact: Britta Carlson (702) 367-5624

Las Vegas, Nev. - Senior management of Sierra Pacific Resources (NYSE: SRP) will review the company's second  quarter 2007 financial results, regulatory issues and other matters during a conference call and webcast on Monday, July 30, at 7 a.m. Pacific Daylight Time.

An archived version of the webcast will remain on the Sierra Pacific Resources web site for approximately one month following the live webcast.  To listen to a recording of the call by telephone, call (800) 475-6701 and use the conference call access code, 880298. International callers should dial (320) 365-3844.

Headquartered in Nevada, 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.