EQT Midstream Partners, LP provides natural gas transmission, storage, and gathering services in Pennsylvania, West Virginia, and Ohio. The company owns, operates, acquires, and develops midstream assets in the Appalachian Basin. As of December 31, 2016, it had 13.5 trillion cubic feet of natural gas equivalents of proved natural gas, natural gas liquids, and crude oil reserves. The company also owned approximately 300 miles of high pressure gathering lines and 1,500 miles of federal energy regulatory commission (FERC) regulated low pressure gathering lines; and approximately 950 miles of FERC regulated interstate pipelines. It serves local distribution companies, marketers, producers, and commercial and industrial users. EQT Midstream Services, LLC serves as the general partner of the company. EQT Midstream Partners, LP is headquartered in Pittsburgh, Pennsylvania.