Senior management of Sierra Pacific Resources (NYSE: SRP) will review the company's first quarter 2008 financial results, regulatory issues and other matters during a conference call and webcast on Wednesday, April 23, at 7 a.m. Pacific Daylight Time.

The live webcast will be accessible on the Sierra Pacific Resources web site at: http://www.sierrapacificresources.com/.

An archived version of the webcast will remain on the Sierra Pacific Resources web site for approximately one month following the webcast. To listen to a recording of the call by telephone, call (800) 475-6701, and international callers should dial (320) 365-3844. Use the conference call access code, 919549.

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.

First Call Analyst:
FCMN Contact: kwalquist@sppc.com

SOURCE: Sierra Pacific Resources

CONTACT: media, Karl Walquist, +1-775-834-3891, or analysts, Britta
Carlson, +1-702-367-5624, both for Sierra Pacific Resources

Web site: http://www.sierrapacificresources.com/