Saint Sébastien Extension Project

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A projected 4 km (2.5 mile) pipeline, the Saint-Sébastien Extension will bring a safe, reliable source of natural gas to homes, businesses and schools.

Projected 4 km (2.5 mile) pipeline

Safe, reliable source of natural gas

Project Timeline

Q3 2015

TransCanada begins engagement with First Nations and stakeholders

Q3 2015

Environmental and technical analyses begin

Q3 2015

Surveys and field studies commence

Q2 2016

An application to build the pipeline is filed with the NEB under section 58

Q2 2017

Subject to regulatory approvals, construction should begin

Q4 2017

Projected completion date

Documents and Maps

The Saint-Sébastien Extension Project will deliver a safe, reliable supply of natural gas.

The route was planned following extensive engagement with landowners, governments, First Nations, Métis and other community members. Explore it below.


Regulatory Contact

The Saint-Sébastien Extension Project is governed according to regulations outlined by the National Energy Board (NEB).

Section 58 application

On May 19, 2016, TransCanada filed a section 58 application with the NEB for its proposed Saint-Sébastien Extension Project. To view the project application, please click on the links below:


National Energy Board (NEB)
Local 1.403.292.4800 1.403.292.5503
Toll-Free 1.800.899.1265 1.877.288.8803


Ways to reach us

We’re here to answer your questions. For general questions you can contact us by email, but for a quicker response, please call us directly.

Saint-Sébastien Extension 
Saint-Sébastien Extension Project (TransCanada)
Community Relations
1000, Rue Sherbrooke Ouest, bureau 1800
Montreal, QC
H3A 3G4
1.544.933.0910 Toll-Free (North America)

Emergency Response

Our commitment to the safety of our people, pipelines and facilities is unwavering. In case of an emergency, please call the appropriate 24-hour toll-free hotline:

Canada: 1.888.982.7222

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
TransCanada 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)