The leaves are starting to change and that means fall is officially upon us. Fall colours also bring caution as weather can be very unpredictable, including colder temperatures and sudden, heavy rainfall. Trans Mountain proactively manages seasonal threats to the pipeline system through our Emergency Management Program.

Natural hazard pre-planning is a critical part of this program, identifying changes in river flows and threats from adverse weather. In the event of high water, the pipeline is actively monitored, and we collaborate with local response agencies in our preparedness efforts.

If necessary, the pipeline can be shut down or certain sections along the pipeline corridor can be isolated. During this time, we conduct detailed investigations of the pipe’s integrity and perform geotechnical assessments of the surrounding landscape before confirming readiness to restart the line.

Although the pipeline is buried below ground, flood waters are capable of removing soil from around the right-of-way, which may result in exposure of the pipeline. To complete necessary repairs, water management may be required to lower water levels in areas of exposed pipe prior to backfilling them. This includes the construction of protective earthworks needed for the pipeline to be returned to service.

It is important to remember, even during emergencies, to Click or Call Before You Dig to know what’s below before beginning any ground disturbance activities or cleanup activity. Whether you’re cleaning a drainage ditch, replacing fence posts or trenching, place a One Call request online at or call your local One Call centre at the numbers below.

In BC call 1.800.474.6886

In Washington state call 811

In Alberta call 1.800.242.3447