Latest Updates on the Trans Mountain Expansion Project

September 29, 2020 - CER inspections continue all along the TMEP route

CER inspector conducting an environmental protection inspection along the Trans Mountain route.

Since the beginning of this year, the Canada Energy Regulator (CER) has published 14 inspection reports that look at specific aspects of the safe construction and operation of the Trans Mountain Expansion Project and existing line. Inspections are continuing this fall to oversee the numerous construction activities at various locations in Alberta and British Columbia where the route has been finalized. Inspections of the project are planned to align with the company’s construction schedule and condition compliance filings.

Since the Covid-19 pandemic was declared, the CER has adapted how it conducts its compliance verification activities, including inspections, to protect the health and safety of CER staff, its regulated companies, and all those we work closely with. In the current operating environment the CER is also working to verify that companies are taking all steps required to protect their workers.

The CER recently posted its inspection report [CV2021-224] which reviews compliance to the contractor code of conduct, the community orientation program, and implementation of COVID-19 safety and hygiene measures at the Valemont Camp. As construction of the project progresses this fall, the CER will continue to conduct inspections to oversee all aspects of the project, including how the environment is protected, people are kept safe and how the pipeline is being built and tested for service in compliance with our regulations.

June 4, 2020 - Detailed route now 86% approved

Status of 2019 detailed route approvals Click to enlarge

Source and description

Source: CER

Description: Status of detailed route approvals


The Commission of the Canada Energy Regulator (Commission) has now approved more than 86 per cent of the detailed route of the Trans Mountain Expansion Project (Project).

On June 4, the Commission approved 122 kilometres of the route in British Columbia [Filing C06676], or 12 per cent, of the entire pipeline route. There is now roughly 135 kilometres, or 14 per cent, of the total 991 kilometre route that remains to be finalized.

Specifically, the Project route is now fully approved in Segment 1 in Alberta, as well as in Segment 3 (between Hargreaves and Blue River) in B.C.. Segment 7 in Burnaby, B.C. is also finalized. A complete list of detailed route approvals can be found on the website.

Construction activities on the Project are only permitted in areas where all pre-construction conditions have been satisfied and the location of the pipeline route has been finalized through the detailed route process.

The portions of the route approved June 4, 2020, follow a May 29, 2020, Commission decision to revise the geographic scope of Detailed Route Hearing MH-027-2020 related to the opposition of Sema:th First Nation (also referred to as Sumas First Nation in recent filings) [Filing C06552].

Reasons for that decision are expected to be released shortly.

May 15, 2020 – Westridge Delivery Line Relocation decision

Trans Mountain Expansion Project Terminals and Tunnel Section Click to enlarge

Source and description

Source: CER

Description: Trans Mountain Expansion Project Terminals and Tunnel Section


Today, the Commission of the CER released its decision on the application for the 3.6-kilometre-long Westridge Delivery Line Relocation, finding that it is in the public interest.

The project will replace an existing delivery line that currently transports oil from the Burnaby Terminal to the Westridge Marine terminal through residential areas of Burnaby. The new delivery line will use the same tunnel through Burnaby Mountain as the two other delivery lines that are part of the Trans Mountain Expansion Project (TMEP). The full decision can be found here [Filing C06322].

Temporary physical disturbance caused by construction of the new delivery line is anticipated only at the proposed entry and exit points for the tunnel, both of which are within the fence lines of Trans Mountain-owned, industrial-zoned land at the Burnaby Terminal and Westridge Marine Terminal. Once the new delivery line is operational, the CER expects Trans Mountain to file an application to decommission the existing delivery line.

Based on Trans Mountain’s current schedule, tunneling activities through Burnaby Mountain are expected to commence in the fall/winter of 2020 and take upwards of two years to complete.

The new delivery line will not result in an increase in the approved volume of transported oil, and its location through Burnaby Mountain is responsive to previous feedback from residents requesting that the existing delivery line be moved from under Burnaby’s streets. This is consistent with the previous National Energy Board finding in the TMEP Certificate hearing that routing the two new TMEP delivery lines through Burnaby Mountain “is the preferable route because it avoids residential areas and urban infrastructure, reduces environmental effects during construction and operation, and minimizes risk during operation.”

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