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Canadian Mainline

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The Canadian Mainline, still connecting customers 60 years later.

The Long-Term Fixed Price (LTFP) service will allow the Canadian Mainline to safely carry natural gas from the Western Canada Sedimentary Basin (WCSB) to Ontario and beyond. Throughout its history, this 14,114 km (8,770 mile) pipeline has helped create jobs, spurred development and powered industries in communities nationwide.

For commercial information, visit TCCustomerExpress.com.

Meeting North American natural gas demand

The demand for reliable and affordable energy continues to grow. A 29 bcf/d of demand growth, driven by LNG exports, gas-fired power generation and industrial demand, is forecast over the next decade.

A positive impact in Canadian communities

The new Mackenzie Vaughan Hospital will positively impact the quality of life for people across Ontario's York Region. We recently toured the hospital construction site to learn more about how our $250,000 donation will support the Mackenzie Health Foundation’s campaign to build this critical community infrastructure and Canada's first smart hospital.


14,114 km (8,770 miles) in length

Carries natural gas from the Western Canada Sedimentary Basin

Delivers fuel for millions of Canadians

Discover Energy: Powering our world

There's the energy you see, and the energy you don’t. Learn more about the process everyday items take on their way to your door.

Documents and maps

The Canadian Mainline natural gas pipeline safely carries natural gas from Alberta and Saskatchewan to Ontario and beyond.   Learn more below.

Regulatory contact

The Canadian Mainline System is governed according to regulations outlined by the Canada Energy Regulator (CER).

Canada Energy Regulator (CER)
Local 1-403-292-4800 1-403-292-5503
Toll-Free 1-800-899-1265 1-877-288-8803


Ways to reach us

TC Energy is committed to notifying affected landowners, towns, communities and local, state and federal governments and agencies involved in the Project. If you have any questions about the Project, please reach out to us via the contact information below.

Canadian Mainline

Canadian Mainline (TC Energy)
450 – 1 St. SW
Calgary, Alberta
T2P 5H1

        Toll-Free (North America)


Emergency Response
Our commitment to the safety of our people, pipelines and facilities is unwavering, 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 all stakeholders: Indigenous communities, landowners and governments. If you have questions or concerns, please let us know.

Head Office
450 – 1 St. SW
Calgary, Alberta
T2P 5H1


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)