Equitrans Midstream Corporation develops, owns, acquires, and operates natural gas gathering, transmission, storage and water services assets in the Appalachian Basin with 3 segments: Gathering, Transmission and Storage and Water Services. The Gathering segment consists of high-pressure and low-pressure gathering lines, while the Transmission and Storage segment consists of interstate pipeline connecting to local distribution companies. The Water Service System segment includes two independent systems of pipelines delivering fresh water from various regional waterways.