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) May 10, 2005

	Registrant, State of Incorporation, Address of	I.R.S. Employer
Commission File	Principal Executive Offices and Telephone	Identification
Number	Number	Number
1-08788	SIERRA PACIFIC RESOURCES	88-0198358
	Nevada
	P.O. Box 10100 (6100 Neil Road)
	Reno, Nevada 89520-0400 (89511)
	(775) 834-4011
2-28348	NEVADA POWER COMPANY	88-0420104
	Nevada
	6226 West Sahara Avenue
	Las Vegas, Nevada 89146
	(702) 367-5000
0-00508	SIERRA PACIFIC POWER COMPANY	88-0044418
	Nevada
	P.O. Box 10100 (6100 Neil Road)
	Reno, Nevada 89520-0400 (89511)
	(775) 834-4011

None

(Former name or former address, 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 May 10, 2005

TABLE OF CONTENTS

Item 2.02 Results of Operations and Financial Condition
Item 9.01 Financial Statements and Exhibits
Signatures
EX-99.1  -  Press Release Dated May 10, 2005

Item 2.02 Results of Operations and Financial Condition

Today, Sierra Pacific Resources and its two utility subsidiaries, Nevada Power Company and Sierra Pacific Power Company, issued a press release disclosing financial results for the fiscal quarter ended March 31, 2005. The text of the release is furnished herewith as Exhibit 99.1.

Item 9.01 Financial Statements and Exhibits.

     (c) Exhibits.

99.1 Press release dated May 10, 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: May 10, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Nevada Power Company (Registrant)
Date: May 10, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Sierra Pacific Power Company (Registrant)
Date: May 10, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller