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Gas Transmission Northwest


Gas Transmission Northwest (GTN) is a 1,377-mile (2,216-km) pipeline system that transports Canadian natural gas to communities in Washington, Oregon and California. With capacity to deliver as much as 2.7 billion cubic feet per day (Bcf/d), GTN offers families and businesses in the Pacific Northwest and California a safe and reliable source of daily fuel for cooking, heating, air conditioning and more.

For commercial information, visit TCPlus.com.

Extends 1,377 miles (2,216 km)

Moves up to 2.7 Bcf/d

Operating since 1961


Documents and maps



How are we regulated?

GTN is governed according to regulations outlined by the U.S.Federal Energy Regulatory Commission (FERC).

Federal Energy Regulatory Commission (FERC)
Local 1-202-502-6088
Toll-Free 1-866-208-3372



Ways to reach us

If you have any questions about the Project, please reach out to us via the contact information below. 

Gas Transmission Northwest (TC Energy)
700 Louisiana Street
Houston, Texas 77002
Emergency Response
Our commitment to the safety of our pipelines and facilities is unwavering. In case of an emergency, visit our Contact page for our complete list of emergency numbers. 
Landowner Helpline
A key component in maintaining the integrity of our facilities is input from stakeholders: Tribal groups, landowners and governments. If you have questions or concerns, please let us know.

Head Office
700 Louisiana Street
Houston, Texas 77002

Media Relations
TC Energy welcomes enquiries from media. Please direct questions to:
1-800-608-7859 Toll-free (North America)
Investor Relations
We welcome inquiries from analysts, shareholders and prospective shareholders at: 
1-800-361-6522 Toll-free (North America)