UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

August 20, 2014

Date of Report (Date of earliest event reported)

CRESTWOOD MIDSTREAM PARTNERS LP

(Exact name of registrant as specified in its charter)

Delaware	001-35377	20-1647837
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

700 Louisiana Street, Suite 2060

Houston, Texas 77002

(Address of principal executive offices)

(832) 519-2200

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01 Regulation FD Disclosure

On August 20, 2014, certain management members of Crestwood Midstream Partners LP (the “Partnership”) will be presenting information concerning its business to investors and other interested parties at the Citi 2014 MLP/Midstream Infrastructure Conference in Las Vegas, NV. The Partnership has posted the investor presentation on the Partnership’s website at www.crestwoodlp.com.

Without limiting the generality of the foregoing, the “Forward-Looking Statements” disclosure contained in the investor presentation is incorporated by reference into this Item 7.01. The information contained in this Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and such information is not incorporated by reference into any registration statements or other document filed under the Securities Act or the Exchange Act, regardless of the general incorporation language contained in such filing, except as shall be expressly set forth by specific reference to this filing

2

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	CRESTWOOD MIDSTREAM PARTNERS LP
	By:	Crestwood Midstream GP LLC, its General Partner
Date: August 20, 2014	By:	/s/ Michael J. Campbell
		Michael J. Campbell
		Senior Vice President and Chief Financial Officer

3