Mountain Valley Pipeline LLC (Mountain Valley) has filed an application with the US Federal Energy Regulatory Commission (FERC) seeking authorization to construct, own, and operate the Southgate project.
The Southgate project involves the construction of a new natural gas pipeline system including approximately 73 miles (117 km) of pipe, one compressor station, associated valves, piping, and appurtenant facilities commencing near Chatham, Virginia, USA, and terminating at a delivery point with Public Service Company of North Carolina Inc. (PSNC Energy) near Graham, North Carolina, USA. Mountain Valley has a long-term, binding precedent agreement with PSNC Energy for 300,000 dekatherms per day. The purpose of the project is to provide new natural gas transportation service for the customer; meet the growing needs of natural gas users in the southeastern US; add a new natural gas transmission pipeline to provide competition and enhance the reliability and resiliency of the existing pipeline infrastructure in North Carolina and southern Virginia; and provide North Carolina and southern Virginia with direct pipeline access to the Marcellus and Utica gas regions in West Virginia, Ohio, and southwestern Pennsylvania, USA.
The Southgate project will construct the Lambert Compressor Station in Pittsylvania County, Virginia. The compressor station will pull gas from the Mountain Valley Pipeline system via the H-605 pipeline for delivery to downstream interconnects on the H-650 pipeline. The Lambert Compressor Station will utilize two gas-driven turbines which combined will provide 28,915 hp (21,570 kW) of compression. The station is expected to include a compressor building, electrical control building, office, and air compressor building. Equipment at the compressor station includes gas filter/separators, gas coolers, inlet air filters, exhaust silencers, tanks, blowdown silencers, heaters, and auxiliary generators.
Mountain Valley anticipates the supply pressure at the Lambert Interconnect to be approximately 780 psig (53.7 bar) while the delivery pressure at the T-21 Haw River Interconnect is expected to be approximately 650 psig (44.8 bar). The gas flow will drop in pressure due to frictional losses and elevation changes as it travels southward within the pipeline. To compensate for these losses, as well as to meet the pressure requirements at the PSNC Energy delivery interconnects, the pressure will be boosted by the Lambert Compressor Station.
The anticipated in-service date is November 1, 2020.