SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of Earliest Event Reported) September 12, 2002 ------------------ Registrant, State of Incorporation, Commission File Address of Principal Executive Offices I.R.S. employer Number and Telephone Number Identification Number 1-8788 SIERRA PACIFIC RESOURCES 88-0198358 P.O. Box 10100 (6100 Neil Road) Reno, Nevada 89520-0400 (89511) (775) 834-4011 1-4698 NEVADA POWER COMPANY 88-0045330 6226 West Sahara Avenue Las Vegas, Nevada 89146 (702) 367-5000 None - -------------------------------------------------------------------------------- (Former name, former address and former fiscal year, if changed since last report) ITEM 5. OTHER EVENTS On September 12, 2002, Sierra Pacific Resources (the parent corporation of Nevada Power Company) issued a press release announcing that it had delivered a letter to the Southern Nevada Water Authority ("SNWA") in response to a letter from the SNWA regarding the agency's proposal to enter into negotiations for the possible purchase of Nevada Power Company. A copy of the press release, dated September 12, 2002, is attached as Exhibit 99.1 hereto. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (a) FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED Not required (b) PRO FORMA FINANCIAL INFORMATION Not required (c) EXHIBITS 99.1 Sierra Pacific Resources - Press Release issued September 12, 2002 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrants have each duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized. SIERRA PACIFIC RESOURCES ------------------------------------ (Registrant) Date: September 13, 2002 By: /s/ William E. Peterson -------------------------------- William E. Peterson Senior Vice President, General Counsel and Corporate Secretary NEVADA POWER COMPANY ------------------------------------ (Registrant) Date: September 13, 2002 By: /s/ William E. Peterson -------------------------------- William E. Peterson Senior Vice President, General Counsel and Corporate Secretary EXHIBIT INDEX SIERRA PACIFIC RESOURCES Exhibit 99.1 -- Press Release issued September 12, 2002