In April 2019, EQM Midstream Partners completed the acquisition of a 60% interest in Eureka Midstream Holdings, LLC and a 100% interest in Hornet Midstream Holdings, LLC. Eureka Midstream is a 190-mile gathering header pipeline system in Ohio and West Virginia that services both dry Utica and wet Marcellus production. Hornet Midstream is a 15-mile, high-pressure gathering system in West Virginia that connects to the Eureka system.
As of December 31, 2021, the gathering system, inclusive of Eureka Midstream’s gathering system, included approximately 1,170 miles of high-pressure gathering lines and 133 compressor units with compression of approximately 491,000 horsepower and multiple interconnect points with the Company’s transmission and storage system and to other interstate pipelines. On average, our gathering operations collected 8.314 billion cubic feet (Bcf) (8,314 Billion British thermal unit (BBtu)) of natural gas daily during 2021.
Equitrans provides gathering services in two manners: firm service and interruptible service. At year-end 2021, the gathering system had total contracted firm reservation capacity (including contracted minimum volume commitments) of approximately 7.0 Bcf per day, which included contracted firm reservation capacity of approximately 1.8 Bcf per day associated with its high-pressure header pipelines.
Interruptible service contracts include volumetric-based fees, which are charges for the volume of natural gas gathered and generally do not guarantee access to the pipeline. These contracts can be short- or long-term. On Equitrans’ low-pressure, FERC-regulated gathering system, the typical gathering agreement provides interruptible service and has a one-year term with month-to-month rollover provisions terminable upon at least 30 days’ notice. The Company generally does not take title to the natural gas transported or stored for its customers.
Gathering also includes Equitrans Midstream’s investment in various gather expansion projects, including the Hammerhead project. See our Projects page for more information.