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. 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. In March 2014, Summit Midstream Partners LP announced that its wholly owned subsidiary, Grand River Gathering, LLC closed acquisition of Red Rock Gathering Company, LLC from a subsidiary of Summit Midstream Partners, LLC.