Project components
The project includes a combination of temporary construction components, permanent infrastructure components and decommissioning/removal of existing infrastructure activities.
Permanent project components
Temporary project components
Click image to enlarge
Anticipated construction activities will include:
- Dredging to prepare the river
- Constructing temporary roads and a trestle bridge to access the site
- Excavating to build the casting basin and approaches
- Concrete batching to casting tunnel and portal components
- Pile driving and installing stone columns to stabilize the ground and river bed
To learn more, view the construction map on page 8 of the project display boards.
Preparing for a complex project
A number of programs were completed to advance project design, understand the area the project would be constructed in, and identify ways to manage impacts from the construction.
Test dredge: We dredged a small section of the Fraser River to confirm sediment and water flow, density of the salt wedge, and the stability of the tunnel foundation.
Geotechnical investigation: We studied upland and in-river geology to inform design, construction methodology and materials management.
Marine navigation simulation: We organized a virtual simulation to ensure we can successfully manage river traffic and operations throughout construction, including safe use of detours during river closures.
Monthly hydrotechnical surveys: We have ongoing surveys to study river flows, including sediment build-up rates.