Summit Midstream Partners, LP is engaged in owning and operating midstream energy infrastructure that is located in North America. The Company provides natural gas gathering and compression services in two resource basins: the Piceance Basin, which includes the Mesaverde, Mancos and Niobrara Shale formations in western Colorado, and the Fort Worth Basin, which includes the Barnett Shale formation in north-central Texas. As of June 30, 2012, the Company�s gathering systems had approximately 385 miles of pipeline and 147,600 horsepower of compression. In June 2013, Summit Midstream Partners LP acquires assets in Bakken, Marcellus. In June 2013, Summit Midstream Partners LP acquired Bison Midstream LLC. In June 2013, Summit Midstream Partners LP closed the previously announced acquisition of certain natural gas gathering pipelines and compression assets located in the liquids-rich window of the Marcellus Shale Play.