Media Contact: Sonya Headen (702) 367-5222
Analyst Contact: Britta Carlson (702) 367-5624

Nevada Power Company, a subsidiary of Sierra Pacific Resources (NYSE:SRP), announced today that it has signed equipment and services contracts as part of the construction of new peaking units at Clark Station Generating Plant located in Clark County, Nev.

The contracts include the following companies:

• Pratt& Whitney will provide 12 FT8® Gas Turbines.
  
• CH2M Hill will be responsible for complete engineering, procurement and construction for the project.

As part of its Integrated Resource Plan, Nevada Power received approval from the Public Utilities Commission of Nevada to build at Clark Station a total of 600 megawatts of new power to be used to serve peak load in its southern Nevada territory.  The first 400 megawatts is scheduled for completion prior to the summer peak of 2008 with the remaining 200 megawatts following by year's end or earlier.

Nevada Power Company is a regulated public utility engaged in the distribution, transmission, generation, purchase and sale of electric energy in the southern Nevada communities of Las Vegas, North Las Vegas, Henderson, Searchlight, Laughlin and their adjoining areas. The Company also provides electricity to Nellis Air Force Base, the Department of Energy at Mercury and Jackass Flats at the Nevada Test Site. Nevada Power Company provides electricity to approximately 790,000 residential and business customers in a 4,500 square mile service area.

Forward-looking statement: These statements are subject to a variety of risks and uncertainties that could cause actual results to differ materially from current expectations. These risks and uncertainties include, but are not limited to, risk related to the construction of the peaking units, and the terms upon which Nevada Power Company would be able to access the capital markets if needed to finance the construction project.  Additional cautionary statements regarding other risk factors that could have an effect on the future performance of Nevada Power Company are contained in its Quarterly Report form 10-Q for the quarter ended September 30, 2006 and its Annual Report on Form 10-K for the year ended December 31, 2005, filed with the SEC. Nevada Power Company undertakes no obligation to release publicly the result of any revisions to these forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.