Summit Midstream Partners, LP is a limited partnership focused on developing, owning and operating midstream energy infrastructure assets. The Company's segments include the Marcellus Shale, which is served by Mountaineer Midstream; the Williston Basin, which is served by Bison Midstream; the Barnett Shale, which is served by DFW Midstream; the Piceance Basin, which is served by Grand River, and Corporate. It provides natural gas gathering, treating and processing services pursuant to long-term and natural gas gathering and processing agreements. The Company operates in approximately four resource basins, including the Appalachian Basin, the Williston Basin, the Fort Worth Basin and the Piceance Basin. Its midstream assets gathering systems include Mountaineer Midstream in northern West Virginia; Bison Midstream in northwestern North Dakota; Polar and Divide in northwestern North Dakota; DFW Midstream in north-central Texas, and Grand River in western Colorado and eastern Utah.