Document:

EX-4.1

 Exhibit 4.1 

Execution Version 
 FIRST
SUPPLEMENTAL INDENTURE 
 FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) to the Indenture (as defined
below), dated as of February 1, 2022, among (i) Crestwood Midstream Partners LP (the “Company”), a Delaware limited partnership and the successor to Oasis Midstream Partners LP (“OMP”), a
Delaware limited partnership, (ii) Crestwood Midstream Finance Corp. (the “Finance Corp.” and, together with the Company from and after the execution of this Supplemental Indenture, the
“Issuers”), a Delaware corporation, wholly owned subsidiary of the Company and the successor to OMP Finance Corp. (“OMP Finance”), (iii) the entities qualifying as Guarantors immediately prior to the
execution of this Supplemental Indenture, as set forth on Schedule A attached hereto (collectively, the “Existing Guarantors”), (iv) the entities listed in Schedule B attached hereto (each, a
“Guaranteeing Subsidiary”) and (v) Regions Bank, as trustee under the Indenture (the “Trustee”). 

W I T N E S S E T H 
 WHEREAS,
OMP and OMP Finance, as issuers, and the Existing Guarantors, as Guarantors, executed and delivered to the Trustee an indenture (as amended and supplemented to the date hereof, the “Indenture”), dated as of March 30,
2021, providing for the issuance of 8.000% Senior Notes due 2029 (the “Notes”); 
 WHEREAS, on October 25,
2021, Crestwood Equity Partners LP (“CEQP”), a Delaware limited partnership, entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Project Phantom Merger Sub LLC, a Delaware
limited liability company and direct wholly owned subsidiary of CEQP (“Merger Sub”), Project Falcon Merger Sub LLC, a Delaware limited liability company and direct wholly owned subsidiary of CEQP (“GP Merger
Sub”), OMP, OMP GP LLC, a Delaware limited liability company and the general partner of OMP (the “Oasis General Partner”), and, solely for the purposes of Section 2.1(a)(i) of the Merger Agreement, Crestwood
Equity GP LLC, pursuant to which, among other things, on February 1, 2022 (the “Effective Date”), Merger Sub merged with and into OMP (the “LP Merger”), with OMP surviving the LP Merger as a
direct subsidiary of CEQP, and GP Merger Sub merged with and into the Oasis General Partner (the “GP Merger” and, together with the LP Merger, the “CEQP Mergers”), with the Oasis
General Partner surviving the GP Merger as a direct wholly owned subsidiary of CEQP, and with the CEQP Mergers having occurred on the terms and subject to the conditions set forth in the Merger Agreement; 

WHEREAS, at the effective time of the CEQP Mergers on the Effective Date (the “Effective Time”), by virtue of the LP
Merger and without any action on the part of CEQP, as the sole member of Merger Sub, all of the limited liability company interests of Merger Sub issued and outstanding immediately prior to the Effective Time were converted into, in the aggregate,
common units representing limited partner interests in OMP (“OMP Common Units”) in an amount equal to the number of OMP Common Units issued and outstanding immediately prior to the Effective Time, and CEQP was automatically
admitted as a limited partner of OMP; 

  
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 WHEREAS, at the Effective Time, by virtue of the GP Merger and without any action on
the part of CEQP, as the sole member of GP Merger Sub, all of the limited liability company interests of GP Merger Sub issued and outstanding immediately prior to the Effective Time were converted into, in the aggregate, limited liability company
interests in the Oasis General Partner (the “OMP GP Interests”) in an amount equal to the number of OMP GP Interests issued and outstanding immediately prior to the Effective Time, and CEQP was automatically admitted as a
member of the Oasis General Partner; 
 WHEREAS, immediately after the Effective Time, pursuant to an Agreement and Plan of Merger, dated as
of February 1, 2022, by and among OMP, the Oasis General Partner and the Company, each of OMP and the Oasis General Partner merged with and into the Company, with the Company surviving such mergers (the “CMLP Mergers”);

 WHEREAS, immediately upon consummation of the CMLP Mergers, pursuant to an Agreement and Plan of Merger, dated as of February 1,
2022, by and between OMP Finance and the Finance Corp., OMP Finance merged with and into the Finance Corp., with the Finance Corp. surviving such merger (the “Finance Merger”); 

WHEREAS, the Company, as a successor to OMP, desires to succeed to and assume OMP’s rights and obligations under the Indenture and the
Notes pursuant to Section 5.01(a)(2) of the Indenture and to comply with the requirements of the Indenture with respect to the execution of a supplemental indenture in connection with such succession and assumption of obligations; 

WHEREAS, the Finance Corp., as a successor to OMP Finance, desires to succeed to and assume OMP Finance’s rights and obligations under
the Indenture and the Notes; 
 WHEREAS, Section 5.01(a) of the Indenture provides that OMP will not, directly or indirectly,
consolidate or merge with and into another Person (whether or not OMP is the surviving Person), unless the conditions of Section 5.01(a) of the Indenture are satisfied; 

WHEREAS, the conditions of Section 5.01(a) of the Indenture have been or, immediately upon consummation of the CMLP Mergers and execution
and delivery of this Supplemental Indenture, will be satisfied, including Section 5.01(a)(2) of the Indenture, which provides that the Person (if other than OMP) formed by or surviving any consolidation or merger subject to Section 5.01 of
the Indenture must assume all the obligations of OMP under the Notes and the Indenture pursuant to a supplemental indenture or other agreements; 

WHEREAS, Section 5.02 of the Indenture provides that, for any such consolidation or merger that is subject to, and complies with the
provisions of, Section 5.01 of the Indenture, the successor Person formed by such consolidation or into or with which OMP is merged shall succeed to, and be substituted for (so that from and after the date of such consolidation or merger, the
provisions of the Indenture referring to the “Company” shall refer instead to the successor Person and not to OMP), and may exercise every right and power of OMP under the Indenture with the same effect as if such successor Person had been
named as the “Company” under the Indenture; 
 WHEREAS, Section 4.15 of the Indenture provides that if, after the Issue Date,
any Restricted Subsidiary of OMP, or its successor (including any Subsidiary acquired or created after the Issue Date) that is not already a Guarantor, (1) guarantees any Indebtedness of an issuer of the Notes or any Guarantor or (2) is a
Domestic Subsidiary and is an obligor with respect to any Indebtedness under any Debt Facility, then, in either case, that Restricted 

  
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Subsidiary will become a Guarantor by executing a supplemental indenture in substantially the form of Exhibit E to the Indenture and delivering an Officer’s Certificate and an Opinion of
Counsel satisfactory to the Trustee, in each case within 30 Business Days after the date that Subsidiary guaranteed or became obligated with respect to such Indebtedness; 

WHEREAS, Section 10.03 of the Indenture provides that, in the event the issuers of the Notes or any of its Restricted Subsidiaries
creates or acquires any Subsidiary after the Issue Date, if required by Section 4.15 of the Indenture, the issuers of the Notes will cause such Subsidiary to comply with the provisions of Section 4.15 and Article 10 of the Indenture, to
the extent applicable; and 
 WHEREAS, Section 9.01 of the Indenture permits, without the consent of any Holder of the Notes, the
issuers of the Notes, the Guarantors and the Trustee to amend or supplement the Indenture, the Notes or the Note Guarantees to (i) to provide for the assumption of an issuer’s or a Guarantor’s obligations to holders of Notes and Note
Guarantees in the case of a merger or consolidation, (ii) to add any additional Guarantor or to evidence the release of any Guarantor from its Note Guarantee or (iii) to provide for the consummation of any transaction permitted by
Section 5.01 of the Indenture; and 
 WHEREAS, Section 9.01 of the Indenture provides that, upon the request of the issuers of the
notes authorizing the execution of any amended or supplemental indenture in accordance with Section 9.01 of the Indenture, and upon receipt by the Trustee of the documents described in Section 7.02 of the Indenture, subject to
Section 9.05, the Trustee will join with the issuers of the Notes and the Guarantors in the execution of any amended or supplemental indenture authorized or permitted by the terms of the Indenture and to make any further appropriate agreements
and stipulations that may be therein contained. 
 NOW, THEREFORE, in consideration of the foregoing and for other good and valuable
consideration, the receipt of which is hereby acknowledged, the Company, the Finance Corp., each entity qualifying as a Guarantor immediately prior to the execution of this Supplemental Indenture, each 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. ASSUMPTION OF THE NOTES. Effective
simultaneously with the consummation of the CMLP Mergers and the Finance Merger: 
 (a) Pursuant to, and in accordance with, the requirements
of Article 5 of the Indenture, the Company hereby assumes from OMP and undertakes to perform, pay or discharge all obligations of OMP, in lieu of and in substitution for OMP, arising from the terms, covenants, conditions and provisions of the
Indenture, including the due and punctual payment of the principal of (and premium, if any) and interest on all the Notes and the performance of every covenant of the Indenture on the part of OMP to be performed or observed. Pursuant to, and in
accordance with, Section 5.02 of the Indenture, the 

  
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provisions of the Indenture referring to the “Company” shall refer to the Company. The Company shall succeed to, and be substituted for, and may exercise every right and power of, OMP
under the Indenture with the same effect as if the Company had been named as OMP therein. Pursuant to Section 5.02 of the Indenture, OMP is hereby discharged and released from all of its obligations and covenants under the Indenture and the
Notes. 
 (b) The Finance Corp. hereby assumes from OMP Finance and undertakes to perform, pay or discharge all obligations of OMP Finance,
in lieu of and in substitution for OMP Finance, arising from the terms, covenants, conditions and provisions of the Indenture, including the due and punctual payment of the principal of (and premium, if any) and interest on all the Notes and the
performance of every covenant of the Indenture on the part of OMP Finance to be performed or observed. The Finance Corp. shall succeed to, and be substituted for, and may exercise every right and power of, OMP Finance under the Indenture with the
same effect as if the Finance Corp. had been named as OMP Finance therein. 
 3. AGREEMENT TO GUARANTEE. Subject to Article 10 of the
Indenture, each Guaranteeing Subsidiary, jointly and severally with the other Guarantors, unconditionally guarantees to each Holder of a Note authenticated and delivered by the Trustee and to the Trustee and its successors and assigns, that:
(a) the principal of, premium on, if any, and interest, if any, on, the Notes will be promptly paid in full when due, whether at maturity, by acceleration, redemption or otherwise, and interest on the overdue principal of, premium on, if any,
and interest, if any, on, the Notes, if lawful, and all other obligations of the Issuers to the Holders or the Trustee under the Indenture or the Notes will be promptly paid in full or performed, all in accordance with the terms of the Indenture and
the Notes; and (b) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that the same will be promptly paid in full when due or performed in accordance with the terms of the extension or renewal,
whether at stated maturity, by acceleration or otherwise. 
 4. NO RECOURSE AGAINST OTHERS. No director, officer, employee, incorporator or
stockholder of any of the Issuers or any Guarantor, as such, will have any liability for any obligations of the Issuers or the Guarantors under the Notes, the Indenture, or the Note Guarantees or for any claim based on, in respect of, or by reason
of, such obligations or their creation. Each Holder of 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. 

5. NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 

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. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Supplemental Indenture or any document to be signed in
connection with this Supplemental Indenture shall be deemed to include electronic signatures, 

  
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deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or
the use of a paper-based recordkeeping system, as the case may be, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means. 

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 each Guaranteeing Subsidiary and the Company. 

[Remainder of page left intentionally blank] 

  
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 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. 
  

			
	CRESTWOOD MIDSTREAM PARTNERS LP
	
	By: Crestwood Midstream GP LLC, its General Partner
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD MIDSTREAM FINANCE CORP.
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

 Signature Page to OMP 2029 Supplemental Indenture 

 
			
	 ARROW MIDSTREAM HOLDINGS LLC

CMLP TRES MANAGER LLC
 CMLP TRES OPERATOR LLC

CRESTWOOD APPALACHIA PIPELINE LLC
 CRESTWOOD CRUDE
SERVICES LLC
 CRESTWOOD ENERGY SERVICES LLC

CRESTWOOD GAS SERVICES OPERATING LLC
 CRESTWOOD
MARCELLUS PIPELINE LLC
 CRESTWOOD MIDSTREAM OPERATONS LLC

CRESTWOOD OHIO MIDSTREAM PIPELINE LLC
 CRESTWOOD
OPERATIONS LLC
 CRESTWOOD PIPELINE LLC
 OASIS
MIDSTREAM SERVICES LLC
 OMP OPERATING LLC

	
	 By: Crestwood Midstream Partners LP, its Sole Member
  

By: Crestwood Midstream GP LLC, its General Partner

 
			
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

 Signature Page to OMP 2029 Supplemental Indenture 

 
			
	 ARROW FIELD SERVICES, LLC

ARROW PIPELINE, LLC
 ARROW WATER, LLC

ARROW WATER SERVICES LLC

	
	By: Arrow Midstream Holdings, LLC, its Sole Member

 
			
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 COWTOWN GAS PROCESSING PARTNERS L.P.

COWTOWN PIPELINE PARTNERS L.P.

	
	By: Crestwood Gas Services Operating GP LLC, its General Partner
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 CRESTWOOD ARKANSAS PIPELINE LLC

CRESTWOOD PANHANDLE PIPELINE LLC

	
	By: Crestwood Pipeline LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

 Signature Page to OMP 2029 Supplemental Indenture 

 
			
	 CRESTWOOD CRUDE LOGISTICS LLC

FINGER LAKES LPG STORAGE, LLC

	
	By: Crestwood Midstream Operations LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 CRESTWOOD CRUDE TERMINALS LLC

CRESTWOOD CRUDE TRANSPORTATION LLC
 CRESTWOOD DAKOTA
PIPELINES LLC

	
	By: Crestwood Crude Logistics LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD GAS SERVICES OPERATING GP LLC
	
	By: Crestwood Gas Services Operating LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

 Signature Page to OMP 2029 Supplemental Indenture 

 
			
	CRESTWOOD MARCELLUS MIDSTREAM LLC
	
	By: Crestwood Marcellus Pipeline LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	E. MARCELLUS ASSET COMPANY, LLC
	
	By: Crestwood Marcellus Midstream LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD SALES & SERVICES INC.
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

 Signature Page to OMP 2029 Supplemental Indenture 

 
			
	CRESTWOOD TRANSPORATION LLC
	
	By: Crestwood Services LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 CRESTWOOD SERVICES LLC

STELLAR PROPANE SERVICES, LLC

	
	By: Crestwood Operations LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 BEARTOOTH DEVCO LLC

BIGHORN DEVCO LLC
 BOBCAT DEVCO LLC

PANTHER DEVCO LLC
  

By: OMP Operating LLC, its Managing Member

		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

 Signature Page to OMP 2029 Supplemental Indenture 

 
			
	REGIONS BANK, as Trustee
		
	By:	 	/s/ Doug Milner
		 	Name: Doug Milner
		 	Title: Senior Vice President

 Signature Page to OMP 2029 Supplemental Indenture 

 SCHEDULE A 

 

	 	1.	 OMP Operating LLC 

	 	2.	 Beartooth DevCo LLC 

	 	3.	 Bighorn DevCo LLC 

	 	4.	 Bobcat DevCo LLC 

	 	5.	 Panther DevCo LLC 

 SCHEDULE B 

 

	 	1.	 ARROW FIELD SERVICES, LLC 

	 	2.	 ARROW MIDSTREAM HOLDINGS, LLC 

	 	3.	 ARROW PIPELINE, LLC 

	 	4.	 ARROW WATER, LLC 

	 	5.	 ARROW WATER SERVICES LLC 

	 	6.	 CMLP TRES MANAGER LLC 

	 	7.	 CMLP TRES OPERATOR LLC 

	 	8.	 COWTOWN GAS PROCESSING PARTNERS L.P. 

	 	9.	 COWTOWN PIPELINE PARTNERS L.P. 

	 	10.	 CRESTWOOD APPALACHIA PIPELINE LLC 

	 	11.	 CRESTWOOD ARKANSAS PIPELINE LLC 

	 	12.	 CRESTWOOD CRUDE LOGISTICS LLC 

	 	13.	 CRESTWOOD CRUDE SERVICES LLC 

	 	14.	 CRESTWOOD CRUDE TERMINALS LLC 

	 	15.	 CRESTWOOD CRUDE TRANSPORTATION LLC 

	 	16.	 CRESTWOOD DAKOTA PIPELINES LLC 

	 	17.	 CRESTWOOD ENERGY SERVICES LLC 

	 	18.	 CRESTWOOD GAS SERVICES OPERATING GP LLC 

	 	19.	 CRESTWOOD GAS SERVICES OPERATING LLC 

	 	20.	 CRESTWOOD MARCELLUS MIDSTREAM LLC 

	 	21.	 CRESTWOOD MARCELLUS PIPELINE LLC 

	 	22.	 CRESTWOOD MIDSTREAM OPERATIONS LLC 

	 	23.	 CRESTWOOD OHIO MIDSTREAM PIPELINE LLC 

	 	24.	 CRESTWOOD OPERATIONS LLC 

	 	25.	 CRESTWOOD PANHANDLE PIPELINE LLC 

	 	26.	 CRESTWOOD PIPELINE LLC 

	 	27.	 CRESTWOOD SALES & SERVICES INC. 

	 	28.	 CRESTWOOD SERVICES LLC 

	 	29.	 CRESTWOOD TRANSPORTATION LLC 

	 	30.	 E. MARCELLUS ASSET COMPANY, LLC 

	 	31.	 FINGER LAKES LPG STORAGE, LLC 

	 	32.	 OASIS MIDSTREAM SERVICES LLC 

	 	33.	 STELLAR PROPANE SERVICE, LLCEX-4.2

 Exhibit 4.2 

Execution Version 
 FOURTH
SUPPLEMENTAL INDENTURE 
 FOURTH SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) to the Indenture (as defined
below), dated as of February 1 , 2022, among OMP Operating LLC, a Delaware limited liability company (“OMP Operating”), Beartooth DevCo LLC, a Delaware limited liability company, Bighorn DevCo LLC, a Delaware limited
liability company, Bobcat DevCo LLC, a Delaware limited liability company, Panther DevCo LLC, a Delaware limited liability company and Oasis Midstream Services LLC, a Delaware limited liability company (collectively, the “New
Guarantors”), each a Domestic Subsidiary of Crestwood Midstream Partners LP, a Delaware limited partnership (the “Company”), the Company, Crestwood Midstream Finance Corporation, a Delaware corporation (the “Co-Issuer” and, together, with the Company, the “Issuers”), each existing Guarantor under the Indenture (as set forth on Schedule A attached hereto, collectively, the
“Existing Guarantors”) and U.S. Bank Trust Company, National Association, as successor in interest to U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”). 

WITNESSETH 
 WHEREAS, the Issuers
and the Existing Guarantors have heretofore executed and delivered to the Trustee an indenture (as amended or supplemented to the date hereof, the “Indenture”), dated as of March 14, 2017, providing for the issuance of the
Issuers’ 5.75% Senior Notes due 2025 (the “Notes”); 
 WHEREAS, on October 25, 2021, Crestwood Equity Partners LP
(“CEQP”), a Delaware limited partnership, entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Project Phantom Merger Sub LLC, a Delaware limited liability company and direct wholly owned
subsidiary of CEQP (“Merger Sub”), Project Falcon Merger Sub LLC, a Delaware limited liability company and direct wholly owned subsidiary of CEQP (“GP Merger Sub”), OMP, OMP GP LLC, a Delaware limited liability
company and the general partner of OMP (the “Oasis General Partner”), and, solely for the purposes of Section 2.1(a)(i) of the Merger Agreement, Crestwood Equity GP LLC, pursuant to which, among other things, on
February 1, 2022 (the “Effective Date”), Merger Sub merged with and into OMP (the “LP Merger”), with OMP surviving the LP Merger as a direct subsidiary of CEQP, and GP Merger Sub merged with and into the Oasis
General Partner (the “GP Merger” and, together with the LP Merger, the “CEQP Mergers”), with the Oasis General Partner surviving the GP Merger as a direct wholly owned subsidiary of CEQP, and with the CEQP Mergers
having occurred on the terms and subject to the conditions set forth in the Merger Agreement; 
 WHEREAS, at the effective time of the CEQP
Mergers on the Effective Date (the “Effective Time”), by virtue of the LP Merger and without any action on the part of CEQP, as the sole member of Merger Sub, all of the limited liability company interests of Merger Sub issued and
outstanding immediately prior to the Effective Time were converted into, in the aggregate, common units representing limited partner interests in OMP (“OMP Common Units”) in an amount equal to the number of OMP Common Units issued
and outstanding immediately prior to the Effective Time, and CEQP was automatically admitted as a limited partner of OMP; 

  
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 WHEREAS, at the Effective Time, by virtue of the GP Merger and without any action on
the part of CEQP, as the sole member of GP Merger Sub, all of the limited liability company interests of GP Merger Sub issued and outstanding immediately prior to the Effective Time were converted into, in the aggregate, limited liability company
interests in the OMP General Partner (the “OMP GP Interests”) in an amount equal to the number of OMP GP Interests issued and outstanding immediately prior to the Effective Time, and CEQP was automatically admitted as a member of
the Oasis General Partner; 
 WHEREAS, immediately after the Effective Time, pursuant to an Agreement and Plan of Merger, dated as of
February 1, 2022, by and among OMP, the Oasis General Partner and the Company, each of OMP and the Oasis General Partner merged with and into the Company, with the Company surviving such mergers; 

WHEREAS, immediately upon consummation of the CMLP Mergers, pursuant to an Agreement and Plan of Merger, dated as of February 1, 2022, by
and between OMP Finance Corp. (“OMP Finance”) and the Co-Issuer, OMP Finance merged with and into the Co-Issuer, with the
Co-Issuer surviving such merger; 
 WHEREAS, immediately upon consummation of the CMLP Mergers,
pursuant to an Agreement and Plan of Merger, dated as of February 1, 2022, by and between OMP Operating and OMP DevCo Holdings Corp., a Delaware corporation (“OMP DevCo”), OMP DevCo merged with and into OMP Operating, with the
OMP Operating surviving such merger; 
 WHEREAS, Section 4.15 of the Indenture provides that under the circumstances set forth therein,
the New Guarantors shall execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantors shall unconditionally guarantee all of the Issuers’ Obligations under the Indenture and the Notes on the terms and
conditions set forth herein (the “Note Guarantee”); and 
 WHEREAS, pursuant to Section 9.01 of the Indenture, the
Trustee, the Issuers and the Existing Guarantors are 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 New Guarantors, the Issuers, the Existing Guarantors and the Trustee mutually covenant and agree for the equal and ratable
benefit of the Holders as follows: 
 1. DEFINED TERMS. Defined terms used herein without definition shall have the meanings assigned to them
in the Indenture. 
 2. AGREEMENT TO GUARANTEE. The New Guarantors hereby unconditionally Guarantee, jointly and severally with all Existing
Guarantors, on the terms and subject to the conditions set forth in Article 10 of the Indenture and agrees to be bound by all other applicable provisions of the Indenture and the Notes and to perform all of the obligations and agreements of a
Guarantor under the Indenture. 

  
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 3. NO RECOURSE AGAINST OTHERS. No past, present or future director, manager, officer,
employee, incorporator, stockholder, member or partner of either of the Issuers, any parent entity of the Company or any Subsidiary of the Company, as such, will have any liability for any obligations of the Issuers or the Guarantors under the
Notes, this Indenture, the Note Guarantees or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder by accepting a Note waives and releases all such liability. The waiver and release are part of the
consideration for issuance of the Notes. 
 4. NOTICES. All notices or other communications to the New Guarantors shall be given as provided
in Section 12.02 of the Indenture. 
 5. RATIFICATION OF INDENTURE; SUPPLEMENTAL INDENTURES PART OF INDENTURE. Except as expressly
amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and
every holder of Notes heretofore or hereafter authenticated and delivered shall be bound hereby. 
 6. GOVERNING LAW. THIS SUPPLEMENTAL
INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 7. 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. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF
transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto and may be used in lieu of the original Supplemental Indenture for all purposes. Signatures of the parties hereto transmitted by
facsimile or PDF shall be deemed to be their original signatures for all purposes. 
 8. EFFECT OF HEADINGS. The Section headings of
this Supplemental Indenture have been inserted for convenience of reference only and are not to be considered part of this Supplemental Indenture or the Indenture and will in no way modify or restrict any of the terms or provisions hereof or
thereof. 
 9. SEVERABILITY. In case any provision in this Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions will not in any way be affected or impaired thereby. 
 10. TRUSTEE MAKES NO
REPRESENTATION. The Trustee makes no representation as to the validity or sufficiency of this Supplemental Indenture. The recitals and statements herein are deemed to be those of the Issuers and the Guarantors and not those of the Trustee, and the
Trustee assumes no responsibility for their correctness. 
 [Remainder of page left intentionally blank] 

  
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 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. 
 Dated: February 1, 2022 

 

			
	CRESTWOOD MIDSTREAM PARTNERS LP
	
	By: Crestwood Midstream GP LLC, its General Partner
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD MIDSTREAM FINANCE CORP.
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 
			
	U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as successor in interest to U.S. Bank National Association, as Trustee
		
	By:	 	/s/ Alejandro Hoyos
		 	Name: Alejandro Hoyos
		 	Title: Vice President

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 
			
	 ARROW MIDSTREAM HOLDINGS LLC

CMLP TRES MANAGER LLC
 CMLP TRES OPERATOR LLC

CRESTWOOD APPALACHIA PIPELINE LLC
 CRESTWOOD CRUDE
SERVICES LLC
 CRESTWOOD ENERGY SERVICES LLC

CRESTWOOD GAS SERVICES OPERATING LLC
 CRESTWOOD
MARCELLUS PIPELINE LLC
 CRESTWOOD MIDSTREAM OPERATONS LLC

CRESTWOOD OHIO MIDSTREAM PIPELINE LLC
 CRESTWOOD
OPERATIONS LLC
 CRESTWOOD PIPELINE LLC
 OASIS
MIDSTREAM SERVICES LLC
 OMP OPERATING LLC

	
	By: Crestwood Midstream Partners LP, its Sole Member
	
	By: Crestwood Midstream GP LLC, its General Partner
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 
			
	 ARROW FIELD SERVICES, LLC

ARROW PIPELINE, LLC
 ARROW WATER, LLC

ARROW WATER SERVICES LLC

	
	By: Arrow Midstream Holdings, LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 COWTOWN GAS PROCESSING PARTNERS L.P.

COWTOWN PIPELINE PARTNERS L.P.

	
	By: Crestwood Gas Services Operating GP LLC, its General Partner
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 CRESTWOOD ARKANSAS PIPELINE LLC

CRESTWOOD PANHANDLE PIPELINE LLC

	
	By: Crestwood Pipeline LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 
			
	 CRESTWOOD CRUDE LOGISTICS LLC

FINGER LAKES LPG STORAGE, LLC

	
	By: Crestwood Midstream Operations LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 CRESTWOOD CRUDE TERMINALS LLC

CRESTWOOD CRUDE TRANSPORTATION LLC
 CRESTWOOD DAKOTA
PIPELINES LLC

	
	By: Crestwood Crude Logistics LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD GAS SERVICES OPERATING GP LLC
	
	By: Crestwood Gas Services Operating LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 
			
	CRESTWOOD MARCELLUS MIDSTREAM LLC
	
	By: Crestwood Marcellus Pipeline LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	E. MARCELLUS ASSET COMPANY, LLC
	
	By: Crestwood Marcellus Midstream LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD SALES & SERVICES INC.
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	CRESTWOOD TRANSPORATION LLC
	
	By: Crestwood Services LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 
			
	 CRESTWOOD SERVICES LLC

STELLAR PROPANE SERVICES, LLC

	
	By: Crestwood Operations LLC, its Sole Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary
	
	 BEARTOOTH DEVCO LLC

BIGHORN DEVCO LLC
 BOBCAT DEVCO LLC

PANTHER DEVCO LLC

	
	By: OMP Operating LLC, its Managing Member
		
	By:	 	/s/ Michael K. Post
		 	Name: Michael K. Post
		 	Title: Vice President, Associate General Counsel & Corporate Secretary

  
 Signature Page to
Crestwood 2025 Supplemental Indenture 

 SCHEDULE A 

 

	 	1.	 ARROW FIELD SERVICES, LLC 

	 	2.	 ARROW MIDSTREAM HOLDINGS, LLC 

	 	3.	 ARROW PIPELINE, LLC 

	 	4.	 ARROW WATER, LLC 

	 	5.	 ARROW WATER SERVICES LLC 

	 	6.	 CMLP TRES MANAGER LLC 

	 	7.	 CMLP TRES OPERATOR LLC 

	 	8.	 COWTOWN GAS PROCESSING PARTNERS L.P. 

	 	9.	 COWTOWN PIPELINE PARTNERS L.P. 

	 	10.	 CRESTWOOD APPALACHIA PIPELINE LLC 

	 	11.	 CRESTWOOD ARKANSAS PIPELINE LLC 

	 	12.	 CRESTWOOD CRUDE LOGISTICS LLC 

	 	13.	 CRESTWOOD CRUDE SERVICES LLC 

	 	14.	 CRESTWOOD CRUDE TERMINALS LLC 

	 	15.	 CRESTWOOD CRUDE TRANSPORTATION LLC 

	 	16.	 CRESTWOOD DAKOTA PIPELINES LLC 

	 	17.	 CRESTWOOD ENERGY SERVICES LLC 

	 	18.	 CRESTWOOD GAS SERVICES OPERATING GP LLC 

	 	19.	 CRESTWOOD GAS SERVICES OPERATING LLC 

	 	20.	 CRESTWOOD MARCELLUS MIDSTREAM LLC 

	 	21.	 CRESTWOOD MARCELLUS PIPELINE LLC 

	 	22.	 CRESTWOOD MIDSTREAM OPERATIONS LLC 

	 	23.	 CRESTWOOD OHIO MIDSTREAM PIPELINE LLC 

	 	24.	 CRESTWOOD OPERATIONS LLC 

	 	25.	 CRESTWOOD PANHANDLE PIPELINE LLC 

	 	26.	 CRESTWOOD PIPELINE LLC 

	 	27.	 CRESTWOOD SALES & SERVICES INC. 

	 	28.	 CRESTWOOD SERVICES LLC 

	 	29.	 CRESTWOOD TRANSPORTATION LLC 

	 	30.	 E. MARCELLUS ASSET COMPANY, LLC 

	 	31.	 FINGER LAKES LPG STORAGE, LLC 

	 	32.	 STELLAR PROPANE SERVICE, LLC 

  
 SCHEDULE A

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