The US Federal Energy Regulatory Commission (FERC) has issued a favorable environmental assessment to WBI Energy Transmission (WBI) for its North Bakken Expansion Project, located in North Dakota. The project includes the installation of an additional 22,500 hp (16,785 kW) at the Tioga Compressor Station (Tioga CS) in Williams County, North Dakota; construction of the new Elkhorn Creek Compressor Station (Elkhorn Creek CS) totaling 3750 hp (2797 kW) in McKenzie County, North Dakota; and installation of the new, and modification of the existing delivery, receipt, and transfer stations along the pipeline routes, replacing small segments of pipeline facilities and installing block valves, pig launcher/receiver stations, and other associated appurtenances.
The proposed Elkhorn Creek CS will include a skid-mounted 3750-hp (2797-kW) Caterpillar G3612 engine driving an Ariel KBZ-4 compressor. The station will also include a gas cooler, an auxiliary cooler, gas cleaning equipment, gas measurement and regulation equipment, associated piping and valves, a septic system, a pipeline liquids storage tank, a waste oil storage tank, a floor drain tank for wastewater, and a 24-in. (609-mm) pig launcher/receiver.
A transfer building will house the transfer grid piping, gas cleaning equipment, and gas measurement and regulation equipment. An auxiliary building will house the motor control center, station programmable logic controller (PLC), human-machine interface (HMI), and an office/shop area.
WBI will modify its existing Tioga CS with the installation of an additional 22,500 hp (16,785 kW) of compression, increasing the station capacity to 23,250 hp (17,344 kW). This includes the installation of six new compressor units, each consisting of a skid-mounted 3750-hp Caterpillar G3612 engine driving an Ariel KBZ-4 compressor. Three new compressor buildings will house two units each. A gas cooler and an auxiliary cooler will be installed for each new compressor unit. Additional appurtenant facilities include a 980-kW backup power generator driven by a natural gas-fired 1380-hp (1029.5-kW) Waukesha L5794GSI engine, a pipeline liquids storage tank, a waste oil storage tank, and a floor drain tank for wastewater.
A new transfer building, auxiliary building, and scrubber building will be erected to house new equipment. Four pig launcher/receivers will be installed and include a 24-in. pig launcher/receiver for the new Tioga-Elkhorn Creek pipeline, a 20-in. (508-mm) pig launcher/receiver for the new Tioga Compressor Lateral, and two 12-in. (304-mm) pig launcher/receivers, one each for the new Line Sections 25 and 30 Loop pipeline.
In addition, WBI will construct approximately 61.9 mi. (99.6 km) of new 24-in. (609.6-mm) natural gas pipeline from the Tioga CS to the proposed Elkhorn Creek CS, construct approximately 0.3 mi. (0.48 km) of new 24-in. natural gas pipeline from the proposed Elkhorn Creek CS to a new interconnect with Northern Border Pipeline Company in McKenzie County, North Dakota; construct approximately 20.4 mi. (32.83 km) of new 12-in. (304.8-mm) natural gas pipeline loop along WBI Energy’s Line Section 25; construct approximately 9.4 mi. (15.13 km) of new 12-in. natural gas pipeline loop along WBI Energy’s Line Section 30; construct approximately 0.5 mi. (0.8 km) of new 20-in. (508-mm) receipt lateral to the Tioga CS; and uprate Line Section 25.
The purpose of the project is to provide an additional 350 MMcfd (9.9 x 106 m3/d) of incremental firm transportation capacity from the Williston Basin in northwest North Dakota to a new interconnect with Northern Border’s existing mainline.