EQT Midstream Partners, LP provides natural gas transmission, storage, and gathering services in southwestern Pennsylvania and northern West Virginia. It owns, operates, acquires, and develops midstream assets in the Appalachian Basin. The company?s transmission and storage system includes approximately 700 mile interstate pipelines; and gathering system comprise approximately 1,600 miles of low-pressure gathering lines. It serves local distribution companies, marketers, producers, and commercial and industrial users, as well as natural gas producers. EQT Midstream Services, LLC operates as the general partner of the company. EQT Midstream Partners, LP is headquartered in Pittsburgh, Pennsylvania.