8-K

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) June 3, 2005

Commission File Number	Registrant, State of Incorporation, Address of Principal Executive Offices and Telephone Number	I.R.S. employer Identification Number
1-08788	SIERRA PACIFIC RESOURCES	88-0198358
	P.O. Box 10100 (6100 Neil Road)
	Reno, Nevada 89520-0400 (89511)
	(775) 834-4011
2-28348	NEVADA POWER COMPANY	88-0420104
	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)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o   Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o   Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b))

o   Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o   Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

TABLE OF CONTENTS

 EX-99.1 - Press Release dated June 3, 2005

Item 8.01. Other Events

     On June 3, 2005, Nevada Power Company, a subsidiary of Sierra Pacific Resources, filed a Base Tariff Energy Rate (BTER) request seeking to set rates to reflect increasing costs for fuel and purchased power needed to serve its customers. If approved, the typical residential customer using 1,250 kilowatt hours of electricity would see a 3.75 percent increase in their monthly bills effective October 1, 2005. A copy of the press release is attached as Exhibit 99.1 hereto.

Item 9.01. Financial Statements and Exhibits

(a)	Financial Statements of Businesses Acquired
	Not required
(b)	Pro forma financial information
	Not required
(c)	Exhibits
	99.1 Press release dated June 3, 2005.

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: June 7, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Nevada Power Company (Registrant)
Date: June 7, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller

EX-99.1

Exhibit 99.1

Nevada Power Files for Base Tariff Energy Rate Increase

June 3, 2005

Media Contact: Andrea Smith (702) 367-5843
Analyst Contact: Britta Carlson (702) 367-5624

Nevada Power Company, a subsidiary of Sierra Pacific Resources (NYSE:SRP) filed a Base Tariff Energy Rate (BTER) request today seeking to set rates to reflect increasing costs for fuel and purchased power needed to serve its customers. The filing is the first as required under new regulations set in 2004 by the Public Utilities Commission of Nevada (PUCN). If approved, the typical residential customer using 1,250 kilowatt hours of electricity would see a 3.75 percent increase, approximately $4.86, in their monthly bills effective October 1.

“Today’s filing reflects a projection of prices of fuel needed to operate our generating plants as well as power we must purchase to serve our customers,” said Pat Shalmy, president of Nevada Power. “The price of natural gas, which is the primary fuel used to produce power in our region of the United States, has been at very high levels for several months. This filing represents the forecast of those prices.”

The BTER does not include any profit for the company. Instead, the overriding goal is to set at a rate that will allow the company to recover dollar-for-dollar the costs of fuel and purchased power and keep rates as stable as possible for customers. The company noted that natural gas prices experienced throughout the United States have over the past year reached their highest levels in history. In addition to this filing, the company will also continue to make annual fuel and purchased power filings in the fall.

The company also noted that conserving and using energy more efficiently benefits everyone, but is especially compelling during times of rising prices. Information on a number of different energy conservation and efficiency programs is available through the company’s website at nevadapower.com.

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. Other subsidiaries include the Tuscarora Gas Pipeline Company, which owns a 50 percent interest in an interstate natural gas transmission partnership.