Exhibit 4.2

[FORM OF FACE OF INITIAL NOTE]

[Global Notes Legend]

UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO AN ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC) ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL NOTE SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO ON THE REVERSE HEREOF.

[Restricted Notes Legend]

THIS NOTE (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND THIS NOTE MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH PURCHASER OF THIS NOTE IS HEREBY NOTIFIED THAT THE SELLER OF THIS NOTE MAY BE RELYING ON THE EXEMPTION FROM THE PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER.

THE HOLDER OF THIS NOTE AGREES FOR THE BENEFIT OF INERGY MIDSTREAM, L.P. AND NRGM FINANCE CORP. THAT (A) THIS NOTE MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) TO AN ISSUER, (II) IN THE UNITED STATES TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (III) OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN ACCORDANCE WITH RULE 904 UNDER THE SECURITIES ACT, (IV) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 THEREUNDER (IF AVAILABLE) OR (V) PURSUANT TO AN EFFECTIVE REGISTRATION

STATEMENT UNDER THE SECURITIES ACT, AND IN EACH OF CASES (I) THROUGH (V) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY SUBSEQUENT PURCHASER OF THIS NOTE FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

INERGY MIDSTREAM, L.P.

NRGM FINANCE CORP.

6.0% Senior Note due 2020

Inergy Midstream, L.P., a Delaware limited partnership, and NRGM Finance Corp., a Delaware corporation, jointly and severally promise to pay to             , or registered assigns, the principal sum of             Dollars on December 15, 2020 [or such greater or lesser amount as may be indicated on the Schedule attached hereto].¹

Interest Payment Dates: June 15 and December 15.

Record Dates: June 1 and December 1.

Additional provisions of this Note are set forth on the other side of this Note.

TRUSTEE’S CERTIFICATE OF

AUTHENTICATION

Dated:

[FORM OF REVERSE SIDE OF INITIAL NOTE]

6.0% Senior Note due 2020

Capitalized terms used herein but not defined shall have the meanings assigned to them in the Indenture referred to below unless otherwise indicated.

1. Interest. Inergy Midstream, L.P., a Delaware limited partnership (the “Company”), and NRGM Finance Corp., a Delaware corporation (the “Finance Corp.” and, together with the Company, the “Issuers”), jointly and severally promise to pay interest on the principal amount of this Note at 6.0% per annum from December 7, 2012 until maturity and shall pay any Additional Interest payable pursuant to Section 2(d) of the Registration Rights Agreement referred to below. The Issuers will pay interest and Additional Interest, if any, semi-annually in arrears on June 15 and December 15 of each year, commencing June 15, 2013, or if any such day is not a Business Day, on the next succeeding Business Day (each an “Interest Payment Date”). Interest on the Notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance; provided that if there is no existing Default or Event of Default in the payment of interest, and if this Note is authenticated between a record date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue from such next succeeding Interest Payment Date, except in the case of the original issuance of Notes, in which case interest shall accrue from the date of authentication. The Issuers shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal and premium, if any, from time to time on demand at a rate that is the rate then in effect, to the extent lawful; and they shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest and Additional Interest, if any (without regard to any applicable grace periods), from time to time on demand at the same rate, to the extent lawful. Interest will be computed on the basis of a 360-day year of twelve 30-day months.

2. Method of Payment. The Issuers will pay interest on the Notes (except defaulted interest) and Additional Interest, if any, to the Persons who are registered Holders of Notes at the close of business on the June 1 or December 1 next preceding the Interest Payment Date, even if such Notes are cancelled after such record date and on or before such Interest Payment Date, except as provided in Section 2.11 of the Indenture with respect to defaulted interest. Holders must surrender Notes to the Paying Agent to collect payments of principal and premium, if any, together with accrued and unpaid interest and Additional Interest, if any, due at maturity. The Notes will be payable as to principal, premium, if any, interest and Additional Interest, if any, at the office or agency of the Issuers maintained for such purpose within the City and State of New York, or, at the option of the Issuers, payment of interest and Additional Interest, if any, may be made by check mailed to the Holders at their addresses set forth in the register of Holders, and provided that payment by wire transfer of immediately available funds to an account in the United States will be required with respect to any amounts due on all Global Notes and all other Notes the Holders of which shall have provided wire transfer instructions to the Issuers or the Paying Agent. Such payment shall be in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts.

3. Paying Agent and Registrar. Initially, U.S. Bank National Association, the Trustee under the Indenture, will act as Paying Agent and Registrar. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company or any of its Subsidiaries may act in any such capacity.

4. Indenture. The Issuers issued the Notes under an Indenture dated as of December 7, 2012 (“Indenture”) among the Issuers, the Guarantors and the Trustee. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (15 U.S. Code §§ 77aaa-77bbbb). The Notes are subject to all such terms, and Holders are referred to the Indenture and such Act for a statement of such terms. The Notes are unsecured senior obligations of the Issuers limited to $500,000,000 aggregate principal amount in the case of Notes issued on the Initial Issuance Date (as defined in the Indenture).

5. Optional Redemption.

(a) Except as set forth in subparagraphs (b), (c) and (d) of this Paragraph 5, the Issuers shall not have the option to redeem the Notes prior to December 15, 2016. On or after December 15, 2016, the Issuers shall have the option to redeem the Notes, in whole or in part at any time, upon prior notice as set forth in Paragraph 8, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest and Additional Interest, if any, to the applicable redemption date (subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the redemption date), if redeemed during the twelve-month period beginning on December 15 of the years indicated below:

(b) Notwithstanding the provisions of subparagraph (a) of this Paragraph 5, at any time prior to December 15, 2015, the Company may on any one or more occasions redeem up to 35% of the aggregate principal amount of Notes (including any Additional Notes) issued under the Indenture at a redemption price of 106.000% of the principal amount thereof, plus accrued and unpaid interest and Additional Interest, if any, thereon to the redemption date (subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the redemption date), in an amount not greater than the net cash proceeds of one or more Equity Offerings by the Company; provided that (i) at least 65% of the aggregate principal amount of Notes (including any Additional Notes) issued under the Indenture remains outstanding immediately after the occurrence of each such redemption (excluding any Notes held by the Company and its Subsidiaries) and (ii) each such redemption occurs within 150 days of the date of the closing of each such Equity Offering.

(c) Prior to December 15, 2016, the Issuers may redeem all or part of the Notes at a redemption price equal to the sum of (1) 100% of the principal amount thereof, plus (2) the Make Whole Premium at the redemption date, plus (3) accrued and unpaid interest, if any, to the redemption date (subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the redemption date)

(d) The Notes may also be redeemed, as a whole, following certain Change of Control Offers, at the redemption price and subject to the conditions set forth in Section 4.15(7) of the Indenture.

6. Mandatory Redemption.

Except as set forth in Paragraph 7 below, neither of the Issuers shall be required to make mandatory redemption or sinking fund payments with respect to the Notes or to repurchase the Notes at the option of the Holders.

7. Repurchase at Option of Holder.

(a) Within 30 days following the occurrence of a Change of Control, the Company shall make an offer (a “Change of Control Offer”) to repurchase all or any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of each Holder’s Notes at a purchase price equal to at least 101% of the aggregate principal amount of Notes repurchased, plus accrued and unpaid interest and Additional Interest, if any, to the date of settlement (the “Change of Control Settlement Date”), subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the Change of Control Settlement Date. Within 30 days following a Change of Control, the Company shall send a notice of the Change of Control Offer to each Holder and the Trustee describing the transaction that constitutes the Change of Control and setting forth the procedures governing the Change of Control Offer as required by Section 4.15 of the Indenture.

(b) On the 361st day after an Asset Sale, if the aggregate amount of Excess Proceeds then exceeds $25.0 million, the Company shall commence an offer to all Holders of Notes (an “Asset Sale Offer”) pursuant to Section 3.09 of the Indenture, and to all holders of any Pari Passu Indebtedness then outstanding, to purchase the maximum principal amount of Notes and such Pari Passu Indebtedness that may be purchased out of the Excess Proceeds, at an offer price in cash in an amount equal to 100% of the principal amount of the Notes plus accrued and unpaid interest and Additional Interest, if any, thereon to the date of settlement, subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the Change of Control Settlement Date, in accordance with the procedures set forth in the Indenture. If any Excess Proceeds remain after consummation of an Asset Sale Offer, the Company or any Restricted Subsidiary may use such remaining Excess Proceeds for any purpose not otherwise prohibited by the Indenture. If the aggregate principal amount of Notes surrendered by Holders thereof and Pari Passu Indebtedness surrendered by holders or lenders, collectively, exceeds the amount of Excess Proceeds, the Trustee shall select the Notes and Pari Passu Indebtedness to be purchased on a pro rata basis (with such adjustments as may be deemed appropriate by the Trustee so that only Notes in denominations of $2,000, or integral multiples of $1,000 in excess thereof, shall be purchased) on the basis of the aggregate principal amount of tendered Notes and Pari Passu Indebtedness. Holders of Notes that are the subject of an offer to purchase will receive an Asset Sale Offer from the Company prior to any related purchase date and may elect to have such Notes purchased by completing the form entitled “Option of Holder to Elect Purchase” on the reverse of the Notes.

8. Notice of Redemption. Notice of redemption will be given at least 30 days but not more than 60 days (except as otherwise provided in the Indenture if the notice is issued in connection with a Legal Defeasance, Covenant Defeasance or Discharge) before the redemption date to each Holder whose Notes are to be redeemed at its registered address. If given in the manner provided for in Section 3.03 of the Indenture, the notice of redemption shall be conclusively presumed to have been given whether or not a Holder receives such notice. Failure to give timely notice or any defect in the notice shall not affect the validity of the redemption. Notes in denominations larger than $2,000 may be redeemed in part but only in whole multiples of $1,000 in excess thereof, unless all of the Notes held by a Holder are to be redeemed. On and after the redemption date interest and Additional Interest, if any, will cease to accrue on Notes or portions thereof called for redemption.

9. Denominations, Transfer, Exchange. The Notes are in registered form without coupons in denominations of $2,000 and integral multiples of $1,000 in excess thereof. The transfer of Notes may be registered and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may require a Holder, among other things, to furnish appropriate endorsements and transfer documents, and the Company may require a Holder to pay any taxes due on transfer or exchange. The Issuers need not exchange or register the transfer of any Note or portion of a Note selected for redemption, except for the unredeemed portion of any Note being redeemed in part. Also, they need not exchange or register the transfer of any Notes for a period of 15 days before a selection of Notes to be redeemed.

10. Persons Deemed Owners. The registered holder of a Note may be treated as its owner for all purposes.

11. Amendment, Supplement and Waiver. Subject to certain exceptions, the Indenture or the Notes may be amended or supplemented with the consent of the Holders of a majority in principal amount of the then outstanding Notes, and any existing default or compliance with any provision of the Indenture or the Notes may be waived with the consent of the Holders of a majority in principal amount of the then outstanding Notes. Without the consent of any Holder of a Note, the Indenture or the Notes may be amended or supplemented (1) to cure any ambiguity, defect or inconsistency, (2) to provide for uncertificated Notes in addition to or in place of certificated Notes, (3) to provide for the assumption of an Issuer’s obligations to Holders of the Notes pursuant to Article 5 of the Indenture, (4) to make any change that would provide any additional rights or benefits to the Holders of the Notes or that does not adversely affect the legal rights under the Indenture of any such Holder, provided that any change to conform the Indenture to the Offering Memorandum shall not be deemed to adversely affect the legal rights under the Indenture of any Holder, (5) to secure the Notes or the Subsidiary Guarantees pursuant to Section 4.12 of the Indenture or otherwise, (6) to provide for the issuance of Additional Notes in accordance with the limitations set forth in the Indenture, (7) to add any additional Guarantor with respect to the Notes or to evidence the release of any Guarantor from its Subsidiary Guarantee, in each case as provided in the Indenture, (8) to comply with the requirements of the SEC in order to effect or maintain the qualification of the Indenture under the Trust Indenture Act, (9) to provide for the reorganization of the Company as any other form of entity in accordance with the second paragraph of Section 5.01 of the Indenture or (10) to evidence or provide for the acceptance of appointment under the Indenture of a successor Trustee.

12. Defaults and Remedies. Events of Default include: (i) default for 30 days in the payment when due of interest or Additional Interest, if any, on the Notes; (ii) default in payment when due of the principal of or premium, if any, on the Notes when due at Stated Maturity, upon optional redemption, upon required repurchase, upon declaration or otherwise; (iii) failure by the Company to comply with Section 3.09, 4.10, 4.15 or 5.01 of the Indenture; (iv) failure by the Company for 180 days after notice to comply with Section 4.03 of the Indenture; (v) failure by the Company for 60 days after notice to comply with any of its other agreements in the Indenture or the Notes; (vi) default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by the Company or any of its Restricted Subsidiaries (or the payment of which is guaranteed by the Company or any of its Restricted Subsidiaries), whether such Indebtedness or guarantee now exists or is created after the Initial Issuance Date, if such default (a) is caused by a failure to pay principal of, or premium or interest, if any, on such Indebtedness prior to the expiration of any grace period provided in such Indebtedness (a “Payment Default”) or (b) results in the acceleration of such Indebtedness prior to its Stated Maturity and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $25.0 million or more, provided that if any such Payment Default is cured or waived or any such acceleration rescinded, or such Indebtedness is repaid, within a period of 30 days from the continuation of such Payment Default beyond the applicable grace period or the occurrence of such acceleration, as the case may be, such Event of Default and any consequential acceleration of the Notes shall be automatically rescinded, so long as such rescission does not conflict with any judgment or decree; (vii) failure by the Company or any of its Subsidiaries to pay final judgments aggregating in excess of $25.0 million (to the extent not covered by insurance by a reputable and creditworthy insurer as to which the insurer has not disclaimed coverage), which judgments are not paid, discharged or stayed for a period of 60 days; (viii) except as permitted by the Indenture, any Subsidiary Guarantee is held in any judicial proceeding to be unenforceable or invalid or ceases for any reason to be in full force and effect or any Guarantor, or any Person acting on behalf of any Guarantor, denies or disaffirms its obligations under its Subsidiary Guarantee; and (ix) certain events of bankruptcy, insolvency or reorganization with respect to the Company, Finance Corp., any of the Company’s Restricted Subsidiaries that is a Significant Subsidiary of the Company or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary of the Company as specified in Section 6.01(i) or 6.01(j) of the Indenture. If any Event of Default occurs and is continuing, the Trustee, by notice to the Issuers, or the Holders of at least 25% in principal amount of the then outstanding Notes, by notice to the Issuers and the Trustee, may declare all the Notes to be due and payable immediately. Notwithstanding the preceding, in the case of an Event of Default arising from such events of bankruptcy, insolvency or reorganization described in Section 6.01(i) or 6.01(j) of the Indenture, all outstanding Notes will become due and payable without further action or notice. Holders may not enforce the Indenture or the Notes except as provided in the Indenture. Subject to certain limitations, Holders of a majority in principal amount of the then outstanding Notes may direct the Trustee in its exercise of any trust or power conferred on it. The Trustee may withhold from Holders of the Notes notice of any continuing Default or Event of Default (except a Default or Event of Default relating to the

payment of principal, interest, premium or Additional Interest) if it determines that withholding notice is in their interest. The Holders of a majority in principal amount of the Notes then outstanding by notice to the Trustee may on behalf of the Holders of all of the Notes waive any existing Default or Event of Default and its consequences under the Indenture except a continuing Default or Event of Default in the payment of the principal of or premium, interest or Additional Interest, if any, on the Notes. The Issuers are required to deliver to the Trustee annually an Officers’ Certificate regarding compliance with the Indenture, and, so long as any Notes are outstanding, the Issuers are required upon becoming aware of any Default or Event of Default, to deliver to the Trustee a statement specifying such Default or Event of Default.

13. Defeasance and Discharge. The Notes are subject to defeasance and discharge upon the terms and conditions specified in the Indenture.

14. No Recourse Against Others. Neither the General Partner, nor any past, present or future director, officer, partner, employee, incorporator, manager or unitholder or other owner of Capital Stock of the Issuers, the General Partner or any Guarantor, as such, shall have any liability for any obligations of the Issuers or any Guarantor under the Notes, the Subsidiary Guarantees or the Indenture 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 the issuance of the Notes.

15. Authentication. This Note shall not be valid until authenticated by the manual signature of an authorized signatory of the Trustee or an authenticating agent.

16. Abbreviations. Customary abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act).

17. Additional Rights of Holders of Transfer Restricted Securities. In addition to the rights provided to Holders of Notes under the Indenture, Holders of Transfer Restricted Securities shall have all the rights set forth in the Registration Rights Agreement dated as of December 7, 2012, among the Issuers, the Guarantors and the Initial Purchasers (the “Registration Rights Agreement”).

18. CUSIP Numbers. Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Issuers have caused CUSIP numbers and corresponding ISIN numbers to be printed on the Notes and the Trustee may use CUSIP numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon.

19. Governing Law. THE INDENTURE AND THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

20. Successors. In the event a successor assumes all the obligations of an Issuer under the Notes and the Indenture, pursuant to the terms thereof, such Issuer will be released from all such obligations.

The Company will furnish to any Holder upon written request and without charge a copy of the Indenture or the Registration Rights Agreement. Requests may be made to:

Inergy Midstream, L.P.

Two Brush Creek Boulevard, Suite 200

Kansas City, Missouri 64112

Attention: Chief Financial Officer

ASSIGNMENT FORM

To assign this Note, fill in the form below:

I or we assign and transfer this Note to

Print or type assignee’s name, address and zip code)

(Insert assignee’s Soc. Sec. or Tax I.D. No.)

and irrevocably appoint                                     agent to transfer this Note on the books of the Issuers. The agent may substitute another to act for him.

Signature Guarantee:

Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

In connection with any transfer of any of the Notes evidenced by this certificate occurring prior to the expiration of one year after the later of the date of original issuance of such Notes (or the date of any subsequent reopening of the Notes) and the last date, if any, on which such Notes were owned by the Company or any Affiliate of the Company (or, in the case of Regulation S Notes, prior to the expiration of the Distribution Compliance Period), the undersigned confirms that such Notes are being transferred in accordance with its terms:

CHECK ONE BOX BELOW

Unless one of the boxes is checked, the Trustee will refuse to register any of the Notes evidenced by this certificate in the name of any person other than the registered holder thereof; provided, however, that if box (4) or (5) is checked, the Trustee shall be entitled to require, prior to registering any such transfer of the Notes, such legal opinions, certifications and other information as the Company has reasonably requested to confirm that such transfer is being made pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act of 1933, such as the exemption provided by Rule 144 under such Act.

TO BE COMPLETED BY PURCHASER IF (3) ABOVE IS CHECKED.

The undersigned represents and warrants that it is purchasing this Note for its own account or an account with respect to which it exercises sole investment discretion and that it and any such account is a “qualified institutional buyer” within the meaning of Rule 144A under the Securities Act of 1933, and is aware that the sale to it is being made in reliance on Rule 144A and acknowledges that it has received such information regarding the Issuers and any Guarantors as the undersigned has requested pursuant to Rule 144A or has determined not to request such information and that it is aware that the transferor is relying upon the undersigned’s foregoing representations in order to claim the exemption from registration provided by Rule 144A.

OPTION OF HOLDER TO ELECT PURCHASE

If you want to elect to have this Note purchased by the Company pursuant to Section 4.10 or 4.15 of the Indenture, check the box below:

If you want to elect to have only part of this Note purchased by the Company pursuant to Section 4.10 or Section 4.15 of the Indenture, state the amount (in minimum denomination of $2,000 or integral multiples of $1,000 in excess thereof) you elect to have purchased: $                    

Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

[TO BE ATTACHED TO GLOBAL NOTE]

SCHEDULE OF INCREASES OR DECREASES IN GLOBAL NOTE

The following increases or decreases in this Global Note have been made:

[FORM OF FACE OF EXCHANGE NOTE]         */

All references to “Additional Interest” in the Note shall be deleted unless if at the date of issuance of the Exchange Note any Registration Default (as defined in the applicable Registration Rights Agreement) has occurred with respect to the related Initial Notes during the interest period in which such date of issuance occurs.

[FORM OF FACE OF EXCHANGE NOTE]

INERGY MIDSTREAM, L.P.

NRGM FINANCE CORP.

6.0% Senior Note due 2020

Inergy Midstream, L.P., a Delaware limited partnership, and NRGM Finance Corp., a Delaware corporation, jointly and severally promise to pay to             , or registered assigns, the principal sum of              Dollars on December 15, 2020 [or such greater or lesser amount as may be indicated on the Schedule attached hereto].²

Interest Payment Dates: June 15 and December 15.

Record Dates: June 1 and December 1.

Additional provisions of this Note are set forth on the other side of this Note.

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

U.S. BANK NATIONAL ASSOCIATION,

as Trustee, certifies that

this is one of the Notes

referred to in the Indenture.

Dated:

[FORM OF REVERSE SIDE OF EXCHANGE NOTE]

6.0% Senior Note due 2020

Capitalized terms used herein but not defined shall have the meanings assigned to them in the Indenture referred to below unless otherwise indicated.

1. Interest. Inergy Midstream, L.P., a Delaware limited partnership (the “Company”), and NRGM Finance Corp., a Delaware corporation (the “Finance Corp.” and, together with the Company, the “Issuers”), jointly and severally promise to pay interest on the principal amount of this Note at 6.0% per annum from December 7, 2012 until maturity and shall pay any Additional Interest payable pursuant to Section 2(d) of the Registration Rights Agreement referred to below. The Issuers will pay interest and Additional Interest, if any, semi-annually in arrears on June 15 and December 15 of each year, commencing June 15, 2013, or if any such day is not a Business Day, on the next succeeding Business Day (each an “Interest Payment Date”). Interest on the Notes will accrue from the most recent date to which interest has been paid or, if no interest has been paid, from the date of original issuance; provided that if there is no existing Default or Event of Default in the payment of interest, and if this Note is authenticated between a record date referred to on the face hereof and the next succeeding Interest Payment Date, interest shall accrue from such next succeeding Interest Payment Date, except in the case of the original issuance of Notes, in which case interest shall accrue from the date of authentication. The Issuers shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal and premium, if any, from time to time on demand at a rate that is the rate then in effect, to the extent lawful; and they shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest and Additional Interest, if any (without regard to any applicable grace periods), from time to time on demand at the same rate, to the extent lawful. Interest will be computed on the basis of a 360-day year of twelve 30-day months.

Method of Payment. The Issuers will pay interest on the Notes (except defaulted interest) and Additional Interest, if any, to the Persons who are registered Holders of Notes at the close of business on the June 1 or December 1 next preceding the Interest Payment Date, even if such Notes are cancelled after such record date and on or before such Interest Payment Date, except as provided in Section 2.11 of the Indenture with respect to defaulted interest. Holders must surrender Notes to the Paying Agent to collect payments of principal and premium, if any, together with accrued and unpaid interest and Additional Interest, if any, due at maturity. The Notes will be payable as to principal, premium, if any, interest and Additional Interest, if any, at the office or agency of the Issuers maintained for such purpose within the City and State of New York, or, at the option of the Issuers, payment of interest and Additional Interest, if any, may be made by check mailed to the Holders at their addresses set forth in the register of Holders, and provided that payment by wire transfer of immediately available funds to an account in the United States will be required with respect to any amounts due on all Global Notes and all other Notes the Holders of which shall have provided wire transfer instructions to the Issuers or the Paying Agent. Such payment shall be in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts.

Paying Agent and Registrar. Initially, U.S. Bank National Association, the Trustee under the Indenture, will act as Paying Agent and Registrar. The Company may change any Paying Agent or Registrar without notice to any Holder. The Company or any of its Subsidiaries may act in any such capacity.

Indenture. The Issuers issued the Notes under an Indenture dated as of December 7, 2012 (“Indenture”) among the Issuers, the Guarantors and the Trustee. The terms of the Notes include those stated in the Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (15 U.S. Code §§ 77aaa-77bbbb). The Notes are subject to all such terms, and Holders are referred to the Indenture and such Act for a statement of such terms. The Notes are unsecured senior obligations of the Issuers limited to $500,000,000 aggregate principal amount in the case of Notes issued on the Initial Issuance Date (as defined in the Indenture).

Optional Redemption.

Except as set forth in subparagraphs (b), (c) and (d) of this Paragraph 5, the Issuers shall not have the option to redeem the Notes prior to December 15, 2016. On or after December 15, 2016, the Issuers shall have the option to redeem the Notes, in whole or in part at any time, upon prior notice as set forth in Paragraph 8, at the redemption prices (expressed as percentages of principal amount) set forth below, plus accrued and unpaid interest and Additional Interest, if any, to the applicable redemption date (subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the redemption date), if redeemed during the twelve-month period beginning on December 15 of the years indicated below:

Notwithstanding the provisions of subparagraph (a) of this Paragraph 5, at any time prior to December 15, 2015, the Company may on any one or more occasions redeem up to 35% of the aggregate principal amount of Notes (including any Additional Notes) issued under the Indenture at a redemption price of 106.000% of the principal amount thereof, plus accrued and unpaid interest and Additional Interest, if any, thereon to the redemption date (subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the redemption date), with the net cash proceeds of one or more Equity Offerings by the Company; provided that (i) at least 65% of the aggregate principal amount of Notes (including any Additional Notes) issued under the Indenture remains outstanding immediately after the occurrence of each such redemption (excluding any Notes held by the Company and its Subsidiaries) and (ii) each such redemption occurs within 150 days of the date of the closing of each such Equity Offering.

Prior to December 15, 2016, the Issuers may redeem all or part of the Notes at a redemption price equal to the sum of (1) 100% of the principal amount thereof, plus (2) the Make Whole Premium at the redemption date, plus (3) accrued and unpaid interest, if any, to the redemption date (subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the redemption date).

The Notes may also be redeemed, as a whole, following certain Change of Control Offers, at the redemption price and subject to the conditions set forth in Section 4.15(7) of the Indenture.

Mandatory Redemption.

Except as set forth in Paragraph 7 below, neither of the Issuers shall be required to make mandatory redemption or sinking fund payments with respect to the Notes or to repurchase the Notes at the option of the Holders.

Repurchase at Option of Holder.

Within 30 days following the occurrence of a Change of Control, the Company shall make an offer (a “Change of Control Offer”) to repurchase all or any part (equal to $2,000 or an integral multiple of $1,000 in excess thereof) of each Holder’s Notes at a purchase price equal to at least 101% of the aggregate principal amount of Notes repurchased, plus accrued and unpaid interest and Additional Interest, if any, to the date of settlement (the “Change of Control Settlement Date”), subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the Change of Control Settlement Date. Within 30 days following a Change of Control, the Company shall send a notice of the Change of Control Offer to each Holder and the Trustee describing the transaction that constitutes the Change of Control and setting forth the procedures governing the Change of Control Offer as required by Section 4.15 of the Indenture.

On the 361st day after an Asset Sale, if the aggregate amount of Excess Proceeds then exceeds $25.0 million, the Company shall commence an offer to all Holders of Notes (an “Asset Sale Offer”) pursuant to Section 3.09 of the Indenture, and to all holders of any Pari Passu Indebtedness then outstanding, to purchase the maximum principal amount of Notes and such Pari Passu Indebtedness that may be purchased out of the Excess Proceeds, at an offer price in cash in an amount equal to 100% of the principal amount of the Notes plus accrued and unpaid interest and Additional Interest, if any, thereon to the date of settlement, subject to the right of Holders on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the Change of Control Settlement Date, in accordance with the procedures set forth in the Indenture. If any Excess Proceeds remain after consummation of an Asset Sale Offer, the Company or any Restricted Subsidiary may use such remaining Excess Proceeds for any purpose not otherwise prohibited by the Indenture. If the aggregate principal amount of Notes surrendered by Holders thereof and Pari Passu Indebtedness surrendered by holders or lenders, collectively, exceeds the amount of Excess Proceeds, the Trustee shall select the Notes and Pari Passu Indebtedness to be purchased on a pro rata basis (with such adjustments as may be deemed appropriate by the Trustee so that only Notes in denominations of $2,000, or integral multiples of $1,000 in excess thereof, shall be purchased) on the basis of the aggregate principal amount of tendered Notes and Pari Passu Indebtedness. Holders of Notes that are the subject of an offer to purchase will receive an Asset Sale Offer from the Company prior to any related purchase date and may elect to have such Notes purchased by completing the form entitled “Option of Holder to Elect Purchase” on the reverse of the Notes.

Notice of Redemption. Notice of redemption will be given at least 30 days but not more than 60 days (except as otherwise provided in the Indenture if the notice is issued in connection with Legal Defeasance, Covenant Defeasance or Discharge) before the redemption date to each Holder whose Notes are to be redeemed at its registered address. If given in the manner provided for in Section 3.03 of the Indenture, the notice of redemption shall be conclusively presumed to have been given whether or not a Holder receives such notice. Failure to give timely notice or any defect in the notice shall not affect the validity of the redemption. Notes in denominations larger than $2,000 may be redeemed in part but only in whole multiples of $1,000 in excess thereof, unless all of the Notes held by a Holder are to be redeemed. On and after the redemption date interest and Additional Interest, if any, will cease to accrue on Notes or portions thereof called for redemption.

Denominations, Transfer, Exchange. The Notes are in registered form without coupons in denominations of $2,000 and integral multiples of $1,000 in excess thereof. The transfer of Notes may be registered and Notes may be exchanged as provided in the Indenture. The Registrar and the Trustee may require a Holder, among other things, to furnish appropriate endorsements and transfer documents, and the Company may require a Holder to pay any taxes due on transfer or exchange. The Issuers need not exchange or register the transfer of any Note or portion of a Note selected for redemption, except for the unredeemed portion of any Note being redeemed in part. Also, they need not exchange or register the transfer of any Notes for a period of 15 days before a selection of Notes to be redeemed.

Persons Deemed Owners. The registered holder of a Note may be treated as its owner for all purposes.

Amendment, Supplement and Waiver. Subject to certain exceptions, the Indenture or the Notes may be amended or supplemented with the consent of the Holders of a majority in principal amount of the then outstanding Notes, and any existing default or compliance with any provision of the Indenture or the Notes may be waived with the consent of the Holders of a majority in principal amount of the then outstanding Notes. Without the consent of any Holder of a Note, the Indenture or the Notes may be amended or supplemented (1) to cure any ambiguity, defect or inconsistency, (2) to provide for uncertificated Notes in addition to or in place of certificated Notes, (3) to provide for the assumption of an Issuer’s obligations to Holders of the Notes pursuant to Article 5 of the Indenture, (4) to make any change that would provide any additional rights or benefits to the Holders of the Notes or that does not adversely affect the legal rights under the Indenture of any such Holder, provided that any change to conform the Indenture to the Offering Memorandum shall not be deemed to adversely affect the legal rights under the Indenture of any Holder, (5) to secure the Notes or the Subsidiary Guarantees pursuant to Section 4.12 of the Indenture or otherwise, (6) to provide for the issuance of Additional Notes in accordance with the limitations set forth in the Indenture, (7) to add any additional Guarantor with respect to the Notes or to evidence the release of any Guarantor from its Subsidiary Guarantee, in each case as provided in the Indenture, (8) to comply with the requirements of the SEC in order to effect or maintain the qualification of the Indenture under the Trust Indenture Act, (9) to provide for the reorganization of the Company as any other form of entity in accordance with the second paragraph of Section 5.01 of the Indenture or (10) to evidence or provide for the acceptance of appointment under the Indenture of a successor Trustee.

Defaults and Remedies. Events of Default include: (i) default for 30 days in the payment when due of interest or Additional Interest, if any, on the Notes; (ii) default in payment when due of the principal of or premium, if any, on the Notes when due at Stated Maturity, upon optional redemption, upon required repurchase, upon declaration or otherwise; (iii) failure by the Company to comply with Section 3.09, 4.10, 4.15 or 5.01 of the Indenture; (iv) failure by the Company for 180 days after notice to comply with Section 4.03 of the Indenture; (v) failure by the Company for 60 days after notice to comply with any of its other agreements in the Indenture or the Notes; (vi) default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any Indebtedness for money borrowed by the Company or any of its Restricted Subsidiaries (or the payment of which is guaranteed by the Company or any of its Restricted Subsidiaries), whether such Indebtedness or guarantee now exists or is created after the Initial Issuance Date, if such default (a) is caused by a failure to pay principal of, or premium or interest, if any, on such Indebtedness prior to the expiration of any grace period provided in such Indebtedness (a “Payment Default”) or (b) results in the acceleration of such Indebtedness prior to its Stated Maturity and, in each case, the principal amount of any such Indebtedness, together with the principal amount of any other such Indebtedness under which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $25.0 million or more, provided that if any such Payment Default is cured or waived or any such acceleration rescinded, or such Indebtedness is repaid, within a period of 30 days from the continuation of such Payment Default beyond the applicable grace period or the occurrence of such acceleration, as the case may be, such Event of Default and any consequential acceleration of the Notes shall be automatically rescinded, so long as such rescission does not conflict with any judgment or decree; (vii) failure by the Company or any of its Subsidiaries to pay final judgments aggregating in excess of $25.0 million (to the extent not covered by insurance by a reputable and creditworthy insurer as to which the insurer has not disclaimed coverage), which judgments are not paid, discharged or stayed for a period of 60 days; (viii) except as permitted by the Indenture, any Subsidiary Guarantee is held in any judicial proceeding to be unenforceable or invalid or ceases for any reason to be in full force and effect or any Guarantor, or any Person acting on behalf of any Guarantor, denies or disaffirms its obligations under its Subsidiary Guarantee; and (ix) certain events of bankruptcy, insolvency or reorganization with respect to the Company, Finance Corp., any of the Company’s Restricted Subsidiaries that is a Significant Subsidiary of the Company or any group of Restricted Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary of the Company as specified in Section 6.01(i) or 6.01(j) of the Indenture. If any Event of Default occurs and is continuing, the Trustee, by notice to the Issuers, or the Holders of at least 25% in principal amount of the then outstanding Notes, by notice to the Issuers and the Trustee, may declare all the Notes to be due and payable immediately. Notwithstanding the preceding, in the case of an Event of Default arising from such events of bankruptcy, insolvency or reorganization described in Section 6.01(i) or 6.01(j) of the Indenture, all outstanding Notes will become due and payable without further action or notice. Holders may not enforce the Indenture or the Notes except as provided in the Indenture. Subject to certain limitations, Holders of a majority in principal amount of the then outstanding Notes may direct the Trustee in its exercise of any trust or power conferred on it. The Trustee may withhold from Holders of the Notes notice of any continuing Default or Event of Default (except a Default or Event of Default relating to the

payment of principal, interest, premium or Additional Interest) if it determines that withholding notice is in their interest. The Holders of a majority in principal amount of the Notes then outstanding by notice to the Trustee may on behalf of the Holders of all of the Notes waive any existing Default or Event of Default and its consequences under the Indenture except a continuing Default or Event of Default in the payment of the principal of or premium, interest or Additional Interest, if any, on the Notes. The Issuers are required to deliver to the Trustee annually an Officers’ Certificate regarding compliance with the Indenture, and, so long as any Notes are outstanding, the Issuers are required upon becoming aware of any Default or Event of Default, to deliver to the Trustee a statement specifying such Default or Event of Default.

Defeasance and Discharge. The Notes are subject to defeasance and discharge upon the terms and conditions specified in the Indenture.

No Recourse Against Others. Neither the General Partner, nor any past, present or future director, officer, partner, employee, incorporator, manager or unitholder or other owner of Capital Stock of the Issuers, the General Partner or any Guarantor, as such, shall have any liability for any obligations of the Issuers or any Guarantor under the Notes, the Subsidiary Guarantees or the Indenture 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 the issuance of the Notes.

Authentication. This Note shall not be valid until authenticated by the manual signature of an authorized signatory of the Trustee or an authenticating agent.

Abbreviations. Customary abbreviations may be used in the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to Minors Act).

Additional Rights of Holders of Transfer Restricted Securities. In addition to the rights provided to Holders of Notes under the Indenture, Holders of Transfer Restricted Securities shall have all the rights set forth in the Registration Rights Agreement dated as of December 7, 2012, among the Issuers, the Guarantors and the Initial Purchasers (the “Registration Rights Agreement”).

CUSIP Numbers. Pursuant to a recommendation promulgated by the Committee on Uniform Security Identification Procedures, the Issuers have caused CUSIP numbers to be printed on the Notes and the Trustee may use CUSIP numbers and corresponding ISIN numbers in notices of redemption as a convenience to Holders. No representation is made as to the accuracy of such numbers either as printed on the Notes or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon.

Governing Law. THE INDENTURE AND THIS NOTE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

Successors. In the event a successor assumes all the obligations of an Issuer under the Notes and the Indenture, pursuant to the terms thereof, such Issuer will be released from all such obligations.

The Company will furnish to any Holder upon written request and without charge a copy of the Indenture [and/or the Registration Rights Agreement]³. Requests may be made to:

Inergy Midstream, L.P.

Two Brush Creek Boulevard, Suite 200

Kansas City, Missouri 64112

Attention: Chief Financial Officer

ASSIGNMENT FORM

To assign this Note, fill in the form below:

I or we assign and transfer this Note to

and irrevocably appoint                  agent to transfer this Note on the books of the Issuers. The agent may substitute another to act for him.

Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.

OPTION OF HOLDER TO ELECT PURCHASE

If you want to elect to have this Note purchased by the Company pursuant to Section 4.10 or 4.15 of the Indenture, check the box below:

If you want to elect to have only part of this Note purchased by the Company pursuant to Section 4.10 or Section 4.15 of the Indenture, state the amount (in minimum denomination of $2,000 or integral multiples of $1,000 in excess thereof) you elected to have purchased: $                

Signatures must be guaranteed by an “eligible guarantor institution” meeting the requirements of the Registrar, which requirements include membership or participation in the Security Transfer Agent Medallion Program (“STAMP”) or such other “signature guarantee program” as may be determined by the Registrar in addition to, or in substitution for, STAMP, all in accordance with the Securities Exchange Act of 1934, as amended.