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): April 4, 2006

	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 Nevada P.O. Box 10100 (6100 Neil Road) Reno, Nevada 89520-0400 (89511) (775) 834-4011	88-0198358
2-28348	NEVADA POWER COMPANY Nevada 6226 West Sahara Avenue Las Vegas, Nevada 89146 (702) 367-5000	88-0420104
0-00508	SIERRA PACIFIC POWER COMPANY Nevada P.O. Box 10100 (6100 Neil Road) Reno, Nevada 89520-0400 (89511) (775) 834-4011	88-0044418

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

	Section 8—Other Events
	Section 9—Financial Statements and Exhibits
SIGNATURES
EX-99.1 Press Release dated April 3, 2006
EX-99.2 Press Release dated April 4, 2006

Section 8—Other Events

Sierra Pacific Power Company
Item 8.01 Other Events

On April 3, 2006, Sierra Pacific Power Company (SPPC), a wholly-owned subsidiary of Sierra Pacific Resources, filed with the California Public Utilities Commission (CPUC) to recover $11.2 million in costs for fuel and power purchased for its California electric customers. The request is a dollar-for-dollar pass through to customers and does not result in a profit to the company.

The filing was made under the CPUC’s Energy Cost Adjustment Clause, which allows utilities to annually recover additional costs of energy such as fuel and power purchased on behalf of its customers, with no mark-up by the utility. The last time SPPC requested to recover additional energy costs was in 2004.

SPPC’s request represents a 17.5% overall increase in electric rates, or a 17.2% increase for residential customers. If approved, the typical residential customer using 650 kilowatt hours of electricity would see a $13.09 rise in their monthly bills from $76.28 to $89.37.

A copy of the press release announcing the filing is filed herewith as Exhibit 99.1.

Nevada Power Company
Item 8.01 Other Events

Nevada Power Company (NPC), a wholly-owned subsidiary of Sierra Pacific Resources, announced today that it reached a stipulation with intervening parties on the going forward rate portion of its annual deferred energy filing. The stipulation is subject to approval of the Public Utilities Commission of Nevada.

If approved, the agreement would result in an increase of approximately 7.1 percent for a typical residential customer using 1250 kilowatt hours, which would be an average monthly increase of $9.10. These new rates would go into effect May 1, 2006. The stipulation does not affect the portion of the deferred energy filing NPC made on January 17, 2006.

A copy of the press release announcing the deferred energy filing is filed herewith as Exhibit 99.2.

Section 9—Financial Statements and Exhibits

Item 9.01 Financial Statements and Exhibits.

(c) Exhibits.

99.1 Press Release dated April 3, 2006.
99.2 Press Release dated April 4, 2006.

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: April 4, 2006	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Nevada Power Company (Registrant)
Date: April 4, 2006	By:	/s/ John E. Brown
		John E. Brown
		Controller
	Sierra Pacific Power Company (Registrant)
Date: April 4, 2006	By:	/s/ John E. Brown
		John E. Brown
		Controller

EX-99.1

Exhibit 99.1

April 3, 2006

Media Contact: Faye I. Andersen
775-834-4822

For Immediate Release

Sierra Pacific Files for Rate Change

With California Public Utilities Commission

Rising Energy Costs Fuel Increase

Sierra Pacific Power Company filed today with the California Public Utilities Commission (CPUC) to recover $11.2 million in costs for fuel and power purchased for its California electric customers. The request is a dollar-for-dollar pass through to customers and does not result in a profit to the company.

The filing was made under the CPUC’s Energy Cost Adjustment Clause, which allows utilities to annually recover additional costs of energy such as fuel and power purchased on behalf of its customers, with no mark-up by the utility. The filing is made when the utility must purchase energy that costs significantly more than it charges customers and now needs to adjust rates to recover the costs that are not included in current rates. When energy costs are lower than the company charges its customers, the company requests to lower rates. The last time Sierra Pacific requested to recover additional energy costs was two years ago.

“Wholesale energy prices have been high for the past year, resulting in our request to increase rates to cover these costs,” said Mary Simmons, vice president of external affairs for Sierra Pacific. “Energy markets have remained volatile, increasing nearly three-fold at times over the past two years.”

The company’s request represents a 17.5% overall increase in electric rates, or a 17.2% increase for residential customers. If approved, the typical residential customer using 650 kilowatt hours of electricity would see a $13.09 rise in their monthly bills from $76.28 to $89.37

The CPUC is expected to conduct hearings into Sierra Pacific’s request, and a decision could be made by fall 2006.

Approximately 80 percent of Sierra Pacific’s 46,000 California customers reside in the Lake Tahoe Basin. The company’s California service area extends from Portola in the north to Markleeville and Topaz Lake to Coleville in the south. Sierra Pacific has approximately 275,000 customers in northern Nevada.

Sierra Pacific Files for Rate Change – add 1

Sierra Pacific Power Company, a wholly-owned subsidiary of Sierra Pacific Resources (NYSE:SRP), is the electric utility serving 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. Sierra Pacific Resources is also the holding company for Nevada Power Company, serving most of southern Nevada, and Tuscarora Gas Pipeline Company, which owns 50 percent interest in an interstate natural gas transmission partnership.

EX-99.2

Exhibit 99.2

FOR IMMEDIATE RELEASE	Media Contact: Andrea Smith
April 3, 2006	702-367-5843
	Analyst Contact: Britta Carlson
	702-367-5624

Nevada Power Company Reaches Stipulation with Intervenors on Going
Forward Portion of Rates

~~~

Agreement Subject to Approval of Public Utilities Commission of Nevada

LAS VEGAS, April 3, 2006 /PRNewswire-FirstCall via COMTEX News Network/ — Nevada Power Company, a wholly-owned subsidiary of Sierra Pacific Resources (NYSE: SRP), announced today that it reached a stipulation with intervening parties on the going forward rate portion of its annual deferred energy filing. The stipulation is subject to approval of the Public Utilities Commission of Nevada.

If approved, the agreement would result in an increase of approximately 7.1 percent for a typical residential customer using 1250 kilowatt hours. After these changes, this customer would see an average monthly increase of $9.10, to $136.98 effective May 1.

The stipulation does not affect the portion of the deferred energy filing made in January in which the company requested to recover costs it had already incurred over a one-year period for fuel and purchased power. The company requested that increase to become effective in August, amounting to about 9 percent. If approved, it would represent an additional increase for a typical residential customer from $136.98 per month to $149.59 per month.

Nevada Power Company is a regulated public utility engaged in the distribution, transmission, generation, purchase and sale of electric energy in the southern Nevada communities of Las Vegas, North Las Vegas, Henderson, Searchlight, Laughlin and their adjoining areas. The Company also provides electricity to Nellis Air Force Base, the Department of Energy at Mercury and Jackass Flats at the Nevada Test Site. Nevada Power Company provides electricity to approximately 750,000 residential and business customers in a 4,500 square mile service area.

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 50 percent interest in an interstate natural gas transmission partnership and several unregulated energy services companies.

Forward-Looking Statements: This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are subject to a variety of risks and uncertainties that could cause actual results to differ materially from current expectations. These risks and uncertainties include, but are not limited to, whether the Public Utilities Commission of Nevada will approve the stipulation on the terms agreed to by the parties. Additional cautionary

statements regarding other risk factors that could have an effect on the future performance of Nevada Power Company are contained in its Annual Report on Form 10-K for the year ended December 31, 2005, filed with the SEC. Nevada Power Company undertakes no obligation to release publicly the result of any revisions to these forward- looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

SOURCE Nevada Power Company

Media,
Andrea Smith,
+1-702-367-5843,
or Analysts,
Britta Carlson,
+1-702-367-5624,
both of Nevada Power Company.