Crestwood Midstream Partners and Crestwood Holdings to Acquire Antero Resources' Marcellus Shale Gathering Assets for $375 Million

HOUSTON, TX -- (Marketwire) -- 02/27/12 -- Crestwood Midstream Partners LP CMLP, Crestwood Holdings Partners LLC and Antero Resources Appalachian Corporation announced today the execution of definitive agreements whereby CMLP and Crestwood Holdings, through a newly formed joint venture ("Crestwood Marcellus Midstream"), have agreed to acquire certain of Antero's Marcellus Shale gathering system assets located in Harrison and Doddridge Counties, West Virginia for $375 million in cash plus an earn-out which would allow Antero to earn additional purchase price payments of up to $40 million based upon average annual production levels achieved during 2012 and 2013.