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Portland Natural Gas Transmission System

Another capital rotation milestone

Learn more about our plans to sell the Portland Natural Gas Transmission System.

Learn more


The 295-mile (475-km) Portland Natural Gas Transmission System (PNGTS) spans New England from the Canadian border to pipeline connections in New Hampshire, Maine and Massachusetts. The system began operations in 1999 and is strategically located between three major pipeline networks originating in Canada and the Southern U.S.

TC Energy owns 61.7 percent of PNGTS. The remaining 38.3 percent is owned by Northern New England Investment Company. The system includes 107 miles of facilities jointly owned by PNGTS and Maritimes & Northeast Pipeline. PNGTS owns 32 percent of those facilities.

For commercial information, visit ebb.tceconnects.com/infopost/.

For information on the related Portland XPress project, visit the project page.

Safe and reliable operations since 1999

Strategically located between major pipeline networks

Helping meet natural gas demand throughout New England


Documents and maps



How are we regulated?

The Portland Natural Gas Transmission System is governed according to regulations outlined by the U.S. Federal Energy Regulatory Commission (FERC). It is also subject to rules and regulations of the Department of Energy (DOE) administered by the Pipeline and Hazardous Materials Safety Administration (PHMSA) and the Environmental Protection Agency (EPA).

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. 

Portland Natural Gas Transmissions System (TC Energy)
700 Louisiana Street
Houston, Texas 77002
Emergency Response
Our commitment to the safety of our people, 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)