Crestwood Midstream Partners LP has agreed with Antero Resources Appalachian Corporation to provide natural gas compression services on developing rich gas acreage in Doddridge County, West Virginia. The new seven year compression services agreement will allow for Crestwood to construct, own and operate a compressor station on Antero's western area acreage, which is not dedicated to Crestwood under the existing 20 year gathering and compression agreement which covers the eastern area of dedication. The new compression services agreement provides for fixed-fee compression services and minimum volume commitments similar to the existing Eastern AOD contract.

A new western area compressor station will be located, designed and installed by Crestwood as requested by Antero and in conjunction with their drilling and development program and the expansion of local gathering and processing infrastructure. The new agreement does not impact Crestwood's seven year right of first offer to acquire midstream infrastructure from Antero in the western area and is in addition to the previously announced construction of two compressor stations, Morgan and Perkins, being constructed by Crestwood in the eastern AOD during 2013.

The compressor station to be constructed under the new agreement will be the West Union Station, a two phase project adding approximately 120 million cubic feet (MMcf) per day of flow capacity at an estimated cost of $35 million which was included in Crestwood's previously announced 2013 capital guidance. West Union Phase I, which adds 55 MMcf per day of capacity, is expected to be in service in early third quarter 2013. West Union Phase II will add 65 MMcf per day of capacity and is expected to be in service by year end 2013.