Crestwood Midstream Partners LP Watch

from 425 7 pages Follow-On Contribution Agreement

from 8-K 98 pages Agreement and Plan of Merger Dated as of May 5, 2013 by and Among Inergy Midstream, L.P., Nrgm GP, LLC, Intrepid Merger Sub, LLC, Inergy, L.P., Crestwood Holdings LLC (Solely for Purposes of Section 3.4(a)), Crestwood Midstream Partners LP and Crestwood Gas Services GP LLC

from 425 98 pages Agreement and Plan of Merger Dated as of May 5, 2013 by and Among Inergy Midstream, L.P., NRGM GP, LLC, Intrepid Merger Sub, LLC, Inergy, L.P., Crestwood Holdings LLC (Solely for Purposes of Section 3.4(a)), Crestwood Midstream Partners LP and Crestwood Gas Services GP LLC

from 425 73 pages Contribution Agreement Limited Liability Company Interests of Crestwood Gas Services GP LLC Dated as of May 5, 2013 Among Crestwood Holdings LLC Crestwood Gas Services Holdings LLC as Contributing Parties and Inergy GP, LLC Inergy, L.P. as Recipient Parties

from 425 98 pages Agreement and Plan of Merger Dated as of May 5, 2013 by and Among Inergy Midstream, L.P., Nrgm GP, LLC, Intrepid Merger Sub, LLC, Inergy, L.P., Crestwood Holdings LLC (Solely for Purposes of Section 3.4(a)), Crestwood Midstream Partners LP and Crestwood Gas Services GP LLC

from 8-K 28 pages Contribution, Conveyance and Assumption Agreement Membership Interest in Crestwood Marcellus Midstream LLC by and Among Crestwood Marcellus Holdings LLC, Crestwood Holdings LLC, Crestwood Gas Services Holdings LLC, Crestwood Gas Services GP LLC as Contributing Parties and Crestwood Midstream Partners LP Crestwood Marcellus Pipeline LLC as Recipient Parties Dated as of January 8, 2013 Contribution, Conveyance and Assumption Agreement

from 8-K 59 pages Asset Purchase Agreement Dated as of February 24, 2012 by and Between Antero Resources Appalachian Corporation and Crestwood Marcellus Midstream LLC

from 8-K 55 pages Purchase and Sale Agreement by and Between Frontier Gas Services, LLC - And - Crestwood Midstream Partners LP February 18, 2011

from 10-K 1 page Reference Is Hereby Made to That Certain Purchase and Sale Agreement Executed on December 10, 2009 (The “Psa”), by and Among Cowtown Pipeline L.P., a Texas Limited Partnership (“Seller”), and Quicksilver Gas Services LP, a Delaware Limited Partnership (“Kgs”), and Cowtown Pipeline Partners L.P., a Texas Limited Partnership (“Cowtown”, Together With Kgs Hereinafter Referred to as “Purchasers”). in Connection With the Transactions Contemplated Under the Psa, This Letter Will Evidence the Agreement of Seller and Purchasers That (A) the Reference to “December 29, 2009” in Section 9.1(a) of the Psa Shall Be Deleted and Replaced With “January 6, 2010”, and (B) the Termination Date Referenced and Defined in Section 10.1(b) Shall Changed From “December 31, 2009” to “January 30, 2010”. Except as Otherwise Provided Herein, the Psa Shall Continue in Full Force and Effect in Accordance With Its Original Terms. This Letter May Be Executed in Counterparts, Each of Which Shall Be Deemed an Original Instrument, but All Such Counterparts Shall Constitute but One Agreement. Cowtown Pipeline L.P. By: Cowtown Pipeline Management, Inc., Its General Partner By: /S/ Philip Cook Philip Cook Senior Vice President — Chief Financial Officer