About Gas Transmission Northwest LLC

Gas Transmission Northwest (GTN) is a 1,376.63 mile interstate natural gas pipeline system that transports Western Canadian Sedimentary Basin and Rocky Mountain-sourced natural gas to third-party natural gas pipelines and markets in Washington, Oregon and California. GTN has an average design capacity of 2,900 million cubic feet per day (MMcf/d). GTN is also connected to the Tuscarora pipeline system, which is wholly-owned by TC PipeLines, LP. Some of the GTN pipeline system's capacity is subject to annual renewals, however greater than 50 percent of the capacity is under long-term contracts, the majority of which mature between 2023 and 2028. GTN is operated by a subsidiary of TC Energy Corporation. TC PipeLines, LP owns 100 percent of GTN.

Quick Asset Facts:

  • Commenced Operations: 1961
  • Originates Near: Kingsgate, British Columbia, Canada
  • Terminates Near: Malin, OR
  • Length (miles): 1,376.63
  • Number of Compressor Mainline Stations: 13
  • Number of Active Physical Receipt / Delivery Points: 4 / 51
  • Installed Mainline and Lateral Horsepower: 519,400 (ISO)
  • Design Capacity Mainline (MMcf/d): 2,669 mmcfd (winter) & 2,522 mmcfd (summer)