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) August 22, 2002 Registrant, State of Incorporation, Address of Commission File Principal Executive Offices and Telephone I.R.S. employer Number 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 0-508 SIERRA PACIFIC POWER COMPANY 88-0044418 P.O. Box 10100 (6100 Neil Road) Reno, Nevada 89520-0400 (89511) (775) 834-4011 None - -------------------------------------------------------------------------------- (Former name, former address and former fiscal year, if changed since last report) ITEM 5. OTHER EVENTS - MATERIAL LITIGATION On August 22, 2002, Sierra Pacific Power Company (the "Company") filed a lawsuit in the First Judicial District Court of the State of Nevada in and for Carson City seeking judicial review of the May 28, 2002 decision of the Public Utilities Commission of Nevada denying the recovery of $55.8 million of deferred energy costs incurred by the Company on behalf of its customers in 2001. At this time, the Company cannot predict how long it will take for the lawsuit to be resolved or the outcome of the lawsuit. A copy of the Company's August 22, 2002 filing is attached hereto as Exhibit 99.1. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS (a) Financial Statements of Businesses Acquired Not required (b) Pro forma financial information Not required (c) Exhibits Sierra Pacific Power Company 99.1 - Petition for Judicial Review of an Order of the Public Utilities Commission of Nevada filed on August 22, 2002 in the case of Sierra Pacific Power Company, Petitioner v. Public Utilities Commission of Nevada, Defendant, in the First Judicial District Court of the State of Nevada in and for Carson City. 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: August 23, 2002 By: /s/ William E. Peterson William E. Peterson Senior Vice President, General Counsel and Corporate Secretary SIERRA PACIFIC POWER COMPANY (Registrant) Date: August 23, 2002 By: /s/ William E. Peterson William E. Peterson Senior Vice President, General Counsel and Corporate Secretary EXHIBIT INDEX SIERRA PACIFIC POWER COMPANY 99.1 - Petition for Judicial Review of an Order of the Public Utilities Commission of Nevada filed on August 22, 2002 in the case of Sierra Pacific Power Company, Petitioner v. Public Utilities Commission of Nevada, Defendant, in the First Judicial District Court of the State of Nevada in and for Carson City.