Crestwood Midstream Operations S-4 Registration of securities issued in business combination transactions

Exhibit 3.25

State of Delaware

Secretary of State

Division of Corporations

Delivered 06:54 PM 09/22/2009

FILED 06:42 PM 09/22/2009

SRV 090875956 – 4733744 FILE

CERTIFICATE OF FORMATION

OF

ARROW WATER, LLC

a Delaware Limited Liability Company

ARTICLE I

The name of the limited liability company (the “Company”) is:

Arrow Water, LLC

ARTICLE II

The Company shall have a perpetual term of existence.

ARTICLE III

The name and street address of the Company’s resident agent in the State of Delaware is The Corporation Trust Company, 1209 Orange Street, Wilmington, Delaware 19801.

IN WITNESS WHEREOF, this Certificate of Formation has been executed by the undersigned on the 22nd day of September, 2009.

/s/ Kenneth L. Hunt

Kenneth L. Hunt

Authorized Person