Exhibit 4.5

FIRST SUPPLEMENTAL INDENTURE

FIRST SUPPLEMENTAL INDENTURE, dated as of October 31, 2019 (this “Supplemental Indenture”), among NGL Energy Partners LP, a Delaware limited partnership (“NGL LP”), NGL Energy Finance Corp., a Delaware corporation (“Finance Corp.,” and, together with NGL LP, the “Issuers”), NGL Delaware Basin Holdings, LLC, a Delaware limited liability company and Subsidiary of NGL LP (the “Guaranteeing Subsidiary”), the other Guarantors (as defined in the Indenture referred to below), and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers and certain Subsidiaries of NGL LP have heretofore executed and delivered to the Trustee an indenture, dated as of April 9, 2019 (the “Indenture”), providing for the issuance by the Issuers of 6.125% Senior Notes due 2026 (the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances, the Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. CAPITALIZED TERMS. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. AGREEMENT TO GUARANTEE. The Guaranteeing Subsidiary hereby agrees to provide an unconditional Guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. EXECUTION AND DELIVERY. The Guaranteeing Subsidiary agrees that the Note Guarantees shall remain in full force and effect notwithstanding any failure to endorse on each Note a notation of such Note Guarantee.

4. NO RECOURSE AGAINST OTHERS. No past, present or future director, officer, partner, employee, incorporator, organizer, manager, unitholder or other owner of Capital Stock (as defined in the Indenture) of the Guaranteeing Subsidiary or agent thereof, as such, shall have any liability for any obligations of the Issuers, the Guarantors, or the Guaranteeing Subsidiary or any other Subsidiary of an Issuer providing a Note Guarantee under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

5. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

6. COUNTERPARTS. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

7. EFFECT OF HEADINGS. The Section headings herein are for convenience only and shall not affect the construction hereof.

8. THE TRUSTEE. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by the Guaranteeing Subsidiary and the Issuers.

(Signature Pages Follow)

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and attested, all as of the date first above written.

GUARANTEEING SUBSIDIARY:

NGL DELAWARE BASIN HOLDINGS, LLC

By: /s/ Robert W. Karlovich III

Name: Robert W. Karlovich III

Title: Executive Vice President and Chief Financial Officer

ISSUERS:

NGL ENERGY PARTNERS LP

By: NGL Energy Holdings, LLC,

its general partner

By: /s/ Robert W. Karlovich III

Name: Robert W. Karlovich III

Title: Executive Vice President and Chief Financial Officer

NGL ENERGY FINANCE CORP.

By: /s/ Robert W. Karlovich III

Name: Robert W. Karlovich III

Title: Executive Vice President and Chief Financial Officer

(Signature Page to First Supplemental Indenture)

EXISTING GUARANTORS:

NGL ENERGY OPERATING LLC

NGL LIQUIDS, LLC

NGL SUPPLY TERMINAL COMPANY, LLC

NGL SUPPLY WHOLESALE, LLC

NGL CRUDE LOGISTICS, LLC

NGL ENERGY HOLDINGS II, LLC

NGL ENERGY LOGISTICS, LLC

NGL CRUDE TERMINALS, LLC

NGL CRUDE CUSHING, LLC

ANTICLINE DISPOSAL, LLC

CENTENNIAL ENERGY, LLC

CENTENNIAL GAS LIQUIDS ULC

NGL WATER SOLUTIONS DJ, LLC

NGL MARINE, LLC

NGL WATER SOLUTIONS EAGLE FORD, LLC

NGL WATER SOLUTIONS, LLC

NGL WATER SOLUTIONS PERMIAN, LLC

NGL CRUDE TRANSPORTATION, LLC

NGL MILAN INVESTMENTS, LLC

GRAND MESA PIPELINE, LLC

TRANSMONTAIGNE LLC

TRANSMONTAIGNE SERVICES LLC

NGL ENERGY EQUIPMENT LLC

CHOYA OPERATING, LLC

NGL WATER PIPELINES, LLC

NGL SOUTH RANCH, INC.

NGL WATER SOLUTIONS - ORLA SWD, LLC

By: /s/ Robert W. Karlovich III

Name: Robert W. Karlovich III

Title: Executive Vice President and Chief Financial Officer

(Signature Page to First Supplemental Indenture)

TRUSTEE:

U.S. BANK NATIONAL ASSOCIATION, as Trustee

By: /s/ Michael K. Herberger

Name: Michael K. Herberger

Title: Vice President

(Signature Page to First Supplemental Indenture)