St. Laurent Pipeline Replacement Project

Project updates

Due to permitting timelines and concurrent projects in the area, Enbridge Gas will split this project into components. The timing of these components is subject to change due to inclement weather and/or other factors.

• Component 1: April – June 2025
  Beginning April 7, periodic traffic lane reductions or closures on St. Laurent Blvd., between the OC Transpo Main Office at 1500 St. Laurent Blvd. and Shore Street.
• Component 2: April – September 2025
• Component 3: August – November 2025
• Component 4: April – July 2025
• Component 5: May – October 2025
• Component 6: July – October 2025
• Component 7: April – June 2025
• Component 8: June – October 2025

Area residents may experience traffic detours, sidewalk closures and construction noise. Access to area homes and businesses will be maintained.

Real time construction updates will be posted here and updated regularly.

Indigenous and community engagement

The collective input from Indigenous communities, government agencies, municipalities, stakeholders, the public and landowners play an integral role in the pipeline route and site selection process.

Prior to construction, public input is sought to ensure that the community is advised of the proposed project and involved in the decision-making process. Public consultation and engagement are key components of the project's environmental report.

The consultation program also helps to identify and address stakeholder concerns and provide the opportunity for meaningful participation in the project review and development process. Input received from the public information sessions is used to help finalize the project and mitigation plans that may be implemented during construction.

Once the Leave to Construct (LTC) application is made to the Ontario Energy Board, any party with an interest in the project, including members of the public, may participate in this process.

Public notification

Online Advertisements and Project Commencement

Notice of Study Commencement letters were distributed to residents in the area near the project in September 2023.

The Notice of Study Commencement was published in the Ottawa Citizen on Sept. 22, 2023 and in Le Droit on Sept. 23, 2023.

View the Notice of Study Commencement in English and French.

Public Information Session

Members of the public, regulatory agencies, and other stakeholders were invited to attend the public information sessions to review the project and to provide comments.

The public information sessions were held on Oct. 3 and 4, 2023, at the at the Richelieu-Vanier Community Centre in Ottawa.

View the presentation in English and French.

Regulatory information

The St. Laurent Pipeline Replacement Project is regulated by the Ontario Energy Board (OEB), an independent government agency that regulates the electricity and natural gas sectors. After a public review and hearing, the OEB approved the Project’s application. All regulatory files about the project are available in this section.

Environmental report

In accordance with the OEB's “Environmental Guidelines for the Location, Construction and Operation of Hydrocarbon Projects and Facilities in Ontario, 8th Edition 2023”, Enbridge Gas retained the services of independent environmental consultant Dillon Consulting to complete the environmental assessment for this project.

The environmental assessment identifies potential impacts of the proposed project on the social, economic and natural environments; local and/or provincial concerns regarding the proposed project; determines the preferred routing of the pipeline; and gathers input from government agencies, stakeholders, Indigenous communities, affected landowners and the public. It may also include mitigation and monitoring measures to minimize the potential impacts of the natural gas pipeline and associated facilities on the environment. The data, analysis and results of the environmental assessment are detailed in the Environmental Report.

View the Environmental Report dated June 2020.

View the first Environmental Report Amendment dated November 2020.

View the second Environmental Report Amendment dated January 2024.

Leave to Construct application

Enbridge Gas filed a Leave to Construct (LTC) application for this project on June 17, 2024.

Read the Leave to Construct application

Read the OEB’s Notice of Hearing in English and French.

View the Interrogatory Responses.

View the Enbridge Gas responses to the undertakings from the Technical Conference held on October 30-31, 2024.

View the Enbridge Gas responses to the undertakings from the Technical Conference held on November 13, 2024.

View the updated Enbridge Gas response to the undertakings from the Technical Conference from the October 30, 2024.

The OEB approved the LTC application on March 18, 2025. Read the OEB’s Decision and Order.

Contact information

We want to hear from you! Please contact us should you have any questions about the proposed project.

For other project inquiries, write to municipalaffairs@enbridge.com.