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Schedule K-3 tax packages for 2021 are now available online. Other information on this website is no longer being maintained but will be available for reference until June 2023.

Gas Transmission Northwest

Our largest pipeline investment, Gas Transmission Northwest (GTN), provides a key service delivering natural gas from Western Canada and the Rocky Mountains to local utilities and power generation facilities in the Pacific Northwest and California.


GTN compressor facility


GTN map

Asset information

TCP Ownership


Began operations



1,377 miles


2.9 Bcf/d

Compressor stations


Primary supply source

Kingsgate interconnect

Originates near:

Kingsgate, British Columbia, Canada (Eastport, Idaho)

Terminates near

Malin, Oregon

Primary markets served

Pacific Northwest, Malin interconnect

Organic growth projects

The GTN XPress project includes upgrades, horsepower replacements, and additional gas cooling at stations in Idaho, Oregon, and Washington. This is expected to meet GTN customers’ needs for reliable and affordable transportation of clean-burning natural gas, consistent with the Pacific Northwest’s desire for a cleaner energy future.

Documents and Maps

More information

For commercial information visit TCPlus.com