NEVADA POWER CO Contracts & Agreements

Underwriting Agreement, dated September 11, 2023, between the Company and the underwriters named therein (Filed With SEC on September 14, 2023)

Form of Officer's Certificate establishing the terms of the Company's 6.000% General and Refunding Mortgage Notes, NPC Series 2023A, Due 2054 (Filed With SEC on September 14, 2023)

Underwriting Agreement, dated October 17, 2022, between the Company and the underwriters named therein (Filed With SEC on October 20, 2022)

Form of Officer's Certificate establishing the terms of the Company's 5.90% General and Refunding Mortgage Notes, Series GG, Due 2053 (Filed With SEC on October 20, 2022)

Bond Purchase Agreement, dated as of May 31, 2022, by and among Sierra Pacific Power Company (Filed With SEC on June 3, 2022)

Third Supplemental Indenture, dated as of May 31, 2022, by and between Sierra Pacific Power Company and the Bank of New York Mellon Trust Company, N.A., as Trustee (Filed With SEC on June 3, 2022)

Officer's Certificate establishing the terms of (Filed With SEC on June 3, 2022)

Underwriting Agreement, dated January 28, 2020, between the Company and the underwriters named therein (Filed With SEC on January 30, 2020)

Form of Officers Certificate establishing the terms of the Companys 2.400% General and Refunding Mortgage Notes, Series DD, Due 2030 (Filed With SEC on January 30, 2020)

Form of Officers Certificate establishing the terms of the Companys 3.125% General and Refunding Mortgage Notes, Series EE, Due 2050 (Filed With SEC on January 30, 2020)

Underwriting Agreement, dated January 28, 2019, between the Company and the underwriters named therein (Filed With SEC on January 30, 2019)

Form of Officers Certificate establishing the terms of the Companys 3.700% General and Refunding Mortgage Notes, Series CC, Due 2029 (Filed With SEC on January 30, 2019)

Underwriting Agreement, dated April 9, 2018, between the Company and the underwriters named therein (Filed With SEC on April 12, 2018)

Form of Officers Certificate establishing the terms of the Companys 2.75% General and Refunding Mortgage Notes, Series BB, Due 2020 (Filed With SEC on April 12, 2018)

FINANCING AGREEMENT By and Between CLARK COUNTY, NEVADA and NEVADA POWER COMPANY Dated as of May1, 2017 Relating to $39,500,000 Clark County, Nevada Pollution Control Refunding... (Filed With SEC on May 25, 2017)

FINANCING AGREEMENT By and Between COCONINO COUNTY, ARIZONA POLLUTION CONTROL CORPORATION and NEVADA POWER COMPANY Dated as of May1, 2017 Relating to $40,000,000 Coconino County,... (Filed With SEC on May 25, 2017)

NEVADA POWER COMPANY OFFICERS CERTIFICATE May 23, 2017 (Filed With SEC on May 25, 2017)

AGREEMENT AND PLAN OF MERGER among MIDAMERICAN ENERGY HOLDINGS COMPANY, SILVER MERGER SUB, INC. and NV ENERGY, INC. Dated as of May 29, 2013 TABLE OF CONTENTS (Filed With SEC on May 29, 2013)

Performance (% of target) Payout % Shares to be Awarded < 90% 0% 90.0% 50% Threshold: 92.5% 63% 95.0% 75% 97.5% 88% 100.0% 100% Target: 102.5% 125% 105.0% 150% 107.5% 175% e... (Filed With SEC on May 8, 2013)

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NVEnergy, Inc. 2003 Non-Employee Director Stock Plan (asamended and restated) (Filed With SEC on August 3, 2012)

Loan Agreement dated October 7, 2011 by and among NV Energy, Inc., JPMorgan Chase Bank, N.A., as administrative agent, and PNC Bank National Association and U.S. Bank National... (Filed With SEC on November 2, 2011)

Amended and Restated Articles of Incorporation of NV Energy, Inc. effective May 9, 2011 (Filed With SEC on August 5, 2011)

NEVADA POWER COMPANY D/B/A NV ENERGY (Filed With SEC on May 10, 2011)

NEVADA POWER COMPANY d/b/a NV Energy (Filed With SEC on May 10, 2011)

NEVADA POWER COMPANY D/B/A NV ENERGY (a Nevada corporation) $250,000,000 (Filed With SEC on September 10, 2010)

NEVADA POWER COMPANY d/b/a NV Energy (Filed With SEC on September 10, 2010)

Employment letter dated April 28, 2010 for Dilek Samil (Filed With SEC on August 6, 2010)

Revolving Credit Facility dated April 28, 2010 between Nevada Power Company and Wells Fargo, N.A., as administrative agent for the lenders (Filed With SEC on August 6, 2010)

Revolving Credit Facility dated April 28, 2010 between Sierra Pacific Power Company and Bank of America, N.A., as administrative agent for the lenders (Filed With SEC on August 6, 2010)

Assistance Agreement dated March 12, 2010 between the U.S. Department of Energy and NV Energy, Inc (Filed With SEC on May 6, 2010)

RECITALS: (Filed With SEC on February 22, 2010)

NVENERGY, INC. AMENDEDAND RESTATED EMPLOYEE STOCK PURCHASE PLAN February2,2010 (Filed With SEC on February 22, 2010)

SEPARATIONAGREEMENT (Filed With SEC on February 22, 2010)

SECOND AMENDMENT TO SECONDAMENDED AND RESTATED CREDIT AGREEMENT (Filed With SEC on May 4, 2009)

FOURTH AMENDMENT TO SECONDAMENDED AND RESTATED CREDIT AGREEMENT (Filed With SEC on May 4, 2009)

SECOND AMENDMENT TO AMENDEDAND RESTATED CREDIT AGREEMENT (Filed With SEC on May 4, 2009)

THIRD AMENDMENT TO AMENDEDAND RESTATED CREDIT AGREEMENT (Filed With SEC on May 4, 2009)

EX-1.1 Purchase Agreement, dated February 25, 2009 (Filed With SEC on February 26, 2009)

EX-4.1 Form of Officer's Certificate (Filed With SEC on February 26, 2009)

EX-1.1 Purchase Agreement, dated 1-7-2009 (Filed With SEC on January 8, 2009)

EX-4.1 Form of Officer's Certificate (Filed With SEC on January 8, 2009)

EX-1.1 Purchase Agreement, dated July 25, 2008 (Filed With SEC on July 28, 2008)

EX-4.1 Form of Officer's Certificate (Filed With SEC on July 28, 2008)

Summary of Compensation for Walter M. Higgins (Filed With SEC on August 7, 2007)

NEVADA POWER COMPANY (a Nevada corporation) $350,000,000 (Filed With SEC on June 27, 2007)

SIERRA PACIFIC POWER COMPANY (a Nevada corporation) $325,000,000 (Filed With SEC on June 27, 2007)

NEVADA POWER COMPANY OFFICERS CERTIFICATE (Filed With SEC on June 27, 2007)

SIERRA PACIFIC POWER COMPANY OFFICERS CERTIFICATE (Filed With SEC on June 27, 2007)

EX-4.(A) Second Supplemental Indenture, dated as of October 30, 2006 (Filed With SEC on March 1, 2007)

EX-10.(A) Beltway Warehouse No. 2 Lease Agreement (Filed With SEC on March 1, 2007)

EX-10.(B) Financing Agreement Humboldt County dated November 1, 2006 Series 2006 (Filed With SEC on March 1, 2007)

EX-10.(C) Financing Agreement Washoe County dated November 1, 2006 Series 2006A (Filed With SEC on March 1, 2007)

EX-10.(D) Financing Agreement Washoe County dated November 1, 2006 Series 2006B (Filed With SEC on March 1, 2007)

EX-10.(E) Financing Agreement Washoe County dated November 1, 2006 Series 2006C (Filed With SEC on March 1, 2007)

Ex-10.1 Financing Agreement, Clark County, dated August 1, 2006 (Filed With SEC on November 3, 2006)

Ex-10.2 Financing Agreement, Coconino County, dated August 1, 2006 (Series 2006A) (Filed With SEC on November 3, 2006)

Ex-10.3 Financing Agreement, Coconino County, dated August 1, 2006 (Series 2006B) (Filed With SEC on November 3, 2006)

EX-4.1 Reg. Rights Agreement Series N, dated 6/26/06 (Filed With SEC on August 4, 2006)

EX-4.2 Reg. Rights Agreement Series O, dated 6/26/06 (Filed With SEC on August 4, 2006)

Ex-10.1 Amendment to Employment Agreement for Walter M. Higgins (Filed With SEC on August 4, 2006)

AMENDMENT TO OFFICERS CERTIFICATE (Filed With SEC on June 19, 2006)

Registration Rights Agreement Dated May 12, 2006 among (Filed With SEC on June 7, 2006)

NEVADA POWER COMPANY OFFICERS CERTIFICATE (Filed With SEC on June 7, 2006)

EX-4.1 Nevada Power Company Officer's Certificate (Filed With SEC on May 8, 2006)

EX-4.2 Form of Series N Notes (Filed With SEC on May 8, 2006)

EX-4.3 Registration Rights Agreement Nevada Power Company (Filed With SEC on May 8, 2006)

EX-4.4 Sierra Power Company Officer's Certificate (Filed With SEC on May 8, 2006)

EX-4.5 Form of Series M Notes (Filed With SEC on May 8, 2006)

EX-4.6 Registration Rights Agreement Sierra Pacific Power Company (Filed With SEC on May 8, 2006)

EX-10.1 Nevada Power Company Amendment and Consent (Filed With SEC on May 8, 2006)

EX-10.2 Sierra Pacific Power Company Amendment and Consent (Filed With SEC on May 8, 2006)

EX-4.(A) OFFICER'S CERTIFICATE - NEVADA POWER COMPANY (Filed With SEC on March 6, 2006)

EX-4.(B) FORM OF NEVADA POWER COMPANY'S 5.95% GENERAL AND REFUNDING MORTGAGE NOTES (Filed With SEC on March 6, 2006)

EX-4.(C) REGISTRATION RIGHTS AGREEMENT - NEVADA POWER COMPANY (Filed With SEC on March 6, 2006)

EX-10.(A) EMPLOYMENT LETTER DATED JANUARY 9, 2006 (Filed With SEC on March 6, 2006)

EX-10.(B) WESTERN SYSTEMS POWER POOL AGREEMENT, DATED 2/1/2005 (Filed With SEC on March 6, 2006)

EX-10.(C) WESTERN SYSTEMS POWER POOL AGREEMENT, DATED 9/1/2005 (Filed With SEC on March 6, 2006)

EX-4.1 OFFICER'S CERTIFICATE DATED AUGUST 12, 2005 (Filed With SEC on November 7, 2005)

EX-4.2 FORM OF SIERRA PACIFIC RESOURCES 6 3/4 % SENIOR NOTES (Filed With SEC on November 7, 2005)

EX-4.3 REGISTRATION RIGHTS AGREEMENT (Filed With SEC on November 7, 2005)

EX-10.1 SECOND AMENDED AND RESTATED CREDIT AGREEMENT (NEVADA POWER CO.) DATED NOVEMBER 4, 2005 (Filed With SEC on November 7, 2005)

AMENDED AND RESTATED CREDIT AGREEMENT (SIERRA PACIFIC POWER CO.) DATED NOVEMBER 4, 2005 (Filed With SEC on November 7, 2005)

EX-10.1 Purchase Agreement (Filed With SEC on August 9, 2005)

EX-10.1 Collective Bargaining Agreement dated as of February 1, 2005 (Filed With SEC on May 10, 2005)

EX-4.(A) Officer's Certificate (Filed With SEC on March 16, 2005)

EX-4.(B) Form of NPC's 5 7/8 General & Refunding Mortgage Notes (Filed With SEC on March 16, 2005)

EX-4.(C) Registration Rights Agreement dated 11/16/2004 (Filed With SEC on March 16, 2005)

EX-4.(D) Twenty-Ninth Supplemental Indenture (Filed With SEC on March 16, 2005)

EX-4.(E) Officer's Certificate (Filed With SEC on March 16, 2005)

EX-4.(F) Form of SPPC's General & Refunding Mortgage Notes (Filed With SEC on March 16, 2005)

EX-10.1 PURCHASE AGREEMENT (Filed With SEC on November 9, 2004)

EX-10.2 CLOSING AGREEMENT (Filed With SEC on November 9, 2004)

EX-10.3 ENGINEERING,PROCUREMENT AND CONSTRUCTION AGREEMENT (Filed With SEC on November 9, 2004)

EX-10.4 EXHIBIT A SPECIFICATION (Filed With SEC on November 9, 2004)

EX-10.5 AMENDED AND RESTATED CREDIT AGREEMENT (Filed With SEC on November 9, 2004)

EX-10.6 CREDIT AGREEMENT (Filed With SEC on November 9, 2004)

EX-1.1 Registration Rights Agreement (Filed With SEC on February 18, 2004)

EX-4.1 OFFICER'S CERTIFICATE NEVADA POWER CO (Filed With SEC on November 13, 2003)

EX-4.2 9% GENERAL AND REFUNDING MORTGAGE NOTES (Filed With SEC on November 13, 2003)

EX-4.3 OFFICER'S CERTIFICATE SIERRA PACIFIC POWER (Filed With SEC on November 13, 2003)

EX-4.4 GENERAL AND REFUNDING MORTGAGE NOTES (D) (Filed With SEC on November 13, 2003)

EX-10.1 EMPLOYMENT AGREEMENT FOR WALTER HIGGINS (Filed With SEC on November 13, 2003)

REGISTRATION RIGHTS AGREEMENT Dated as of October 29, 2002 by and among Nevada Power Company as Issuer and Lehman Brothers Inc. Credit Suisse First Boston Corporation as the... (Filed With SEC on January 27, 2003)