UNITED STATES 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) December 13, 2005

	Registrant, State of Incorporation, Address of
Commission File	Principal Executive Offices and Telephone	I.R.S. employer
Number	Number	Identification Number
1-08788	SIERRA PACIFIC RESOURCES P.O. Box 10100 (6100 Neil Road) Reno, Nevada 89520-0400 (89511) (775) 834-4011	88-0198358
2-28348	NEVADA POWER COMPANY 6226 West Sahara Avenue Las Vegas, Nevada 89146 (702) 367-5000	88-0420104
0-508	SIERRA PACIFIC POWER COMPANY P.O. Box 10100 (6100 Neil Road) Reno, Nevada 89520-0400 (89511) (775) 834-4011	88-0044418

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

	Item 7.01 Regulation FD Disclosure
	Item 9.01 Financial Statements and Exhibits
Signatures
Exhibit Index
Ex-99.1 Information from December 13-16, 2005 Presentation

Item 7.01 Regulation FD Disclosure

Sierra Pacific Resources will be conducting meetings with investors, bankers and analysts from December 13 through December 16, 2005. The information furnished in exhibit 99.1 hereto is a reconciliation of certain non-GAAP financial information that will be included in presentations made by Sierra Pacific Resources during these meetings. Pursuant to general instruction B.2 to Form 8-K, the information furnished pursuant to Item 7.01 shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

Item 9.01 Financial Statements and Exhibits

(c) Exhibits

     99.1 Information from December 13 — 16, 2005 Presentation

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: December 13, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Nevada Power Company (Registrant)
Date: December 13, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Sierra Pacific Power Company (Registrant)
Date: December 13, 2005	By:	/s/ John E. Brown
		John E. Brown
		Controller

Exhibit Index

Exhibit No.	Description
99.1	Information from December 13 — 16, 2005 Presentation