Protecting a valuable resource
Like you, we value water resources. That’s why extreme care and consideration is taken when planning our projects. Our engineering and environmental field teams have spent many hours, gathering detailed information about rivers and streams along the pipeline route. For all of the bodies of waters we may cross, we’ve conducted field programs to collect information to support our applications to the BC Environmental Assessment Office and the Oil and Gas Commission.
Learn more about how we take care of rivers and streams in our Q&A.
Crossing rivers and streams
There are three ways we can cross water bodies. Two methods involve excavating a trench (ditch) and the third does not involve excavation in the stream channel. We decide on which method to use, based on our environmental and engineering studies.
- Open cut – this method is used when the stream or water body is seasonally dry or completely frozen; we excavate a trench across a water way and then lay the pipeline into the trench.
- Isolation – water is temporarily redirected from its natural channel while the trench is excavated, and the pipeline is placed in the trench.
- Trenchless – through this method, we install the pipeline under the water body, without excavating a trench through the stream bed. There is no impact to the flow of the rivers and streams when completing a trenchless crossing, because we don’t construct through the bed or banks; this method requires a larger footprint of activity on either side of the stream.
24 hours a day, 365 days a year, Coastal GasLink will be monitored.