JOINDER AND AMENDMENT AGREEMENT

Exhibit 3.13

JOINDER AND AMENDMENT AGREEMENT

THIS JOINDER AND AMENDMENT AGREEMENT (the “Joinder and Amendment Agreement”), is made and entered into by and among Tesoro High Plains Pipeline Company LLC, a Delaware limited liability company (“THPPLLC”), Tesoro Corporation, a Delaware corporation (“Tesoro”), and Tesoro Logistics Operations LLC, a Delaware limited liability company (the “Operating Company”), to be effective as of April 26, 2011 (the “Effective Date”).

RECITALS

WHEREAS, THPPLLC was formed on November 23, 2010;

WHEREAS, Tesoro, as sole member of THPPLLC, entered into the Limited Liability Company Agreement of THPPLLC dated as of December 2, 2010 (the “LLC Agreement”);

WHEREAS, effective as of April 26, 2011, Tesoro transferred its interest in THPPLLC to the Operating Company; and

WHEREAS, Tesoro and the Operating Company now desire to amend the LLC Agreement to replace Tesoro with the Operating Company as the member as of the Effective Date.

NOW, THEREFORE, in consideration of the premises, covenants and agreements contained in the LLC Agreement and the Joinder and Amendment Agreement, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

Section 1. Joinder. By executing and delivering the Joinder and Amendment Agreement, the Operating Company hereby agrees, as of the Effective Date, that it (a) became a party to the LLC Agreement, (b) became bound by the terms and conditions thereof, and (c) received the benefits of the LLC Agreement. The Operating Company agrees that it has and shall continue to have all rights and obligations of a member under the LLC Agreement. The Operating Company represents and warrants that it has been furnished with a copy of the LLC Agreement and has thoroughly read and understands the same and all implications thereof.

Section 2. Amendments to the LLC Agreement.

(a) The LLC Agreement is hereby amended so that each and every reference in the LLC Agreement to “Initial Member” is replaced with “Member.”

(b) The Preamble of the LLC Agreement is hereby amended and restated in its entirety to read as follows:

“This Limited Liability Company Agreement (this “Agreement”) of TESORO HIGH PLAINS PIPELINE COMPANY LLC, a Delaware limited liability company (the “Company”), effective as of December 2, 2010, as amended effective as of April 26, 2011, is entered into by and between the Company and Tesoro Logistics Operations LLC, a Delaware limited liability company, the Company’s sole member (the “Member”).”

(c) Section 1.2 of the LLC Agreement is hereby amended and restated in its entirety to read as follows:

“Required Filings. The Certificate of Formation was filed with the Delaware Secretary of State on November 23, 2010. The Member is hereby designated as the “authorized person” within the meaning of the Act. To the extent any provision of this Agreement conflicts with any provision of the Certificate of Formation, the provisions of the Certificate of Formation govern.”

Section 3. Amendment to Exhibit B of the LLC Agreement. Exhibit B of the LLC Agreement is hereby amended and restated in its entirety to read as set forth in Annex A to the Joinder and Amendment Agreement.

Section 4. Limited Amendment. Except as expressly set forth herein, the Joinder and Amendment Agreement shall not by implication or otherwise limit, impair, constitute a waiver of, or otherwise affect the rights and remedies of the parties hereto under the LLC Agreement, and shall not alter, modify, amend or in any way affect any of the terms, conditions, obligations, covenants or agreements contained in the LLC Agreement, all of which are ratified and affirmed in all respects and shall continue in full force and effect.

Section 5. Governing Law, Construction. The Joinder and Amendment Agreement is governed by and shall be construed in accordance with the Law of the State of Delaware. In the event of a direct conflict between the provisions of the Joinder and Amendment Agreement and any mandatory, non-waivable provision of the Act as such term is defined in the LLC Agreement, such provision of the Act shall control.

Section 6. Capitalized Terms. Capitalized terms not otherwise defined in the Joinder and Amendment Agreement have the meanings set forth in the LLC Agreement.

[Signature Page Follows]

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IN WITNESS WHEREOF, the parties hereto have executed and delivered the Joinder and Amendment Agreement as of this 23^rd day of March 2012.

THPPLLC:		TESORO HIGH PLAINS PIPELINE COMPANY LLC, a Delaware limited liability company
		By:		/s/ Xxxxxxx X. Xxxxxxx
				Name: Xxxxxxx X. Xxxxxxx
				Title: Vice President, General Counsel and Secretary
TESORO:		TESORO CORPORATION, a Delaware corporation
		By:		/s/ Xxxxxxx X. Xxxxxxx
				Name: Xxxxxxx X. Xxxxxxx
				Title: Executive Vice President, General Counsel and Secretary
OPERATING COMPANY:		TESORO LOGISTICS OPERATIONS LLC, a Delaware limited liability company
		By:		/s/ Xxxxxxx X. Xxxxxxx
				Name: Xxxxxxx X. Xxxxxxx
				Title: Vice President, General Counsel and Secretary

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ANNEX A

EXHIBIT B

The Company

THE COMPANY		ADDRESS FOR NOTICE PURPOSES
Tesoro High Plains Pipeline Company LLC		19100 Ridgewood Parkway San Antonio TX 00000 (000) 000-0000 (phone) (000) 000-0000 (facsimile)

Member

INITIAL MEMBER		ADDRESS FOR NOTICE PURPOSES		MEMBERSHIP INTEREST
Tesoro Logistics Operations LLC		19100 Ridgewood Parkway San Antonio TX 00000 (000) 000-0000 (phone) (000) 000-0000 (facsimile)		100%

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