Turbine-Powered Compression For Canadian Pipeline Expansion

Map courtesy of TransCanada.

NOVA Gas Transmission Ltd. (NGTL), a wholly owned subsidiary of TransCanada, is seeking approval from Canada’s National Energy Board to construct, own, and operate the 2021 NGTL System Expansion Project. NGTL proposes to build and operate approximately 217 miles (350 km) of natural gas pipeline, compressor stations, and associated facilities in northwestern Alberta, Canada. If approved, the project would add new pipeline parallel or adjacent to the existing NGTL System.

The project is required to expand pipeline capacity to transport gas from areas of increasing natural gas production in the Peace River Project Area (PRPA) to intra-Alberta and export markets. The growing natural gas production in the PRPA includes a shift of production from other areas on the NGTL System to the northwest portion of the NGTL System.

The target in-service timing for the project is April 2021. Facilities included in the project are organized by three main areas:

Grande Prairie West Area, including:

  • Grande Prairie Mainline Loop No. 4 (Valhalla Section) – Pipeline loop of approximately 23 miles (38 km) between MLV 120 and MLV 143. This will be a loop of the existing Grande Prairie Mainline.
  • Grande Prairie Mainline Loop No. 3 (Elmworth Section) – Pipeline loop of approximately 29 miles (47 km) between MLV 85 and MLV 115. This will be a loop of the existing Grande Prairie Mainline.

Grande Prairie South Area, including:

  • Grande Prairie Mainline Loop No. 2 (Karr Section) – Pipeline loop of approximately 35 miles (57 km) between MLV 60 and MLV 80. This will be a loop of the existing Grande Prairie Mainline.
  • Grande Prairie Mainline Loop No. 2 (Deep Valley Section) – Pipeline loop of approximately 42 miles (68 km) between MLV 30 and MLV 60. This will be a loop of the existing Grande Prairie Mainline.
  • Grande Prairie Mainline Loop No. 2 (McLeod River Connection Section) – Pipeline loop of approximately 9 miles (15 km) between MLV 27 and MLV 28. This will be a loop of the existing Grande Prairie Mainline.

Edson South Area, including:

  • Edson Mainline Loop No. 4 (Robb Section) – Pipeline loop of approximately 26 miles (42 km) between MLV 100 and MLV 110. This will be a loop of the existing Edson Mainline.
  • Edson Mainline Loop No. 4 (Dismal Creek Section) – Pipeline loop of approximately 20 miles (33 km) between MLV 90 and MLV 100. This will be a loop of the existing Edson Mainline.
  • Edson Mainline Loop No. 4 (Brewster Section) – Pipeline loop of approximately 31 miles (50 km) between MLV 60 and MLV 80 (Nordegg Compressor Station). This will be a loop of the existing Edson Mainline.
  • Nordegg Compressor Station Unit Addition – Addition of a single 30 MW to 40 MW turbo-compressor unit (gas turbine and compressor), at or near the existing Nordegg Compressor Station. Work associated with the unit addition will include a compressor building, aerial coolers, auxiliary buildings, and yard piping.
  • Didsbury Compressor Station Unit Addition – Addition of a single 30 MW to 40 MW turbo-compressor unit (gas turbine and compressor) at or near the existing Didsbury Compressor Station. Work associated with the unit addition will include a compressor building, aerial coolers, auxiliary buildings, and yard piping.
  • Beiseker Compressor Station Unit Addition – Addition of a single 30 MW to 40 MW turbo-compressor unit (gas turbine and compressor) at or near the existing Beiseker Compressor Station. Work associated with the unit addition will include a compressor building, aerial coolers, auxiliary buildings and yard piping.
  • January Creek Control Valve – Addition of a control valve and associated pipeline tie-ins to safely facilitate the flow of gas from the January Creek Lateral to the Western Alberta System.