The Harrison County fractionation complex will be connected through an expansion of MarkWest’s Marcellus NGL gathering system to its Houston facility, the largest fractionation and marketing complex in the Marcellus Shale. The Houston and Harrison County facilities will provide tremendous operating flexibility and reliability as well as access to multiple markets. The Harrison County fractionator will be owned jointly by MarkWest Liberty Midstream, L.L.C. and MarkWest Utica, and the capital required to build the complex will be shared accordingly. By the end of 2014, MarkWest will be able to provide its producer customers with nearly 275,000 Bbl/d of C2+ fractionation capacity and extensive market access to all of the planned ethane and propane pipeline projects in the Marcellus and Utica Shales.“We are excited to extend our strong partnership with Antero Resources and continue the development of leading midstream infrastructure in the heart of the Utica Shale,” said Frank Semple, Chairman, President and Chief Executive Officer of MarkWest. “We believe that Antero’s success in the Marcellus will prove to be a natural extension into the hydrocarbon-rich area of the Utica. With the support of our strong partner EMG, we are committed to providing best-of-class, fully-integrated midstream services for our producer customers.” ”We are fortunate to have a rich gas and condensate play in Ohio in such close proximity to our Marcellus Shale rich gas project,” said Paul Rady, Chairman and Chief Executive Officer of Antero. “MarkWest is a natural fit for Antero to partner with in the Utica to build the first processing complex near our acreage position, given their processing and fractionation plans in the Utica and the integration with their leading position in the Marcellus.” About MarkWest Energy Partners, LP MarkWest Energy Partners, L.P. is a master limited partnership engaged in the gathering, transportation, and processing of natural gas; the transportation, fractionation, marketing, and storage of natural gas liquids; and the gathering and transportation of crude oil. MarkWest has extensive natural gas gathering, processing, and transmission operations in the southwest, Gulf Coast, and northeast regions of the United States, including the Marcellus Shale, and is the largest natural gas processor and fractionator in the Appalachian region.