Fraser river immersed tunnel

This immersed tunnel under the Fraser River will replace the existing George Massey tunnel on highway 99 between Vancouver and the communities to the south and the U.S. border — which has become outdated and insufficient. It will serve as a vital transportation link, reduce travel times, improve transportation safety, and offer better public transit options. It includes:

• A twin-tube immersed tunnel with 4 traffic lanes in each direction, 2 of which are dedicated to public transit, with a total length of 1,100 meters including cut-and-cover approach sections; the immersed sections have a total width of 45 meters
• A multi-use path for pedestrians and cyclists between the two tubes
• A new bridge over the Deas Slough with 2×4 lanes, 380 meters long
• Access interchanges
• Various structures, retaining walls, etc.
• Technical buildings for ventilation and services

The innovative and advanced design solutions of the immersed tunnel will prioritize sustainable construction practices.

Upon completion, the existing tunnel will be dismantled.

As part of this project, INGEROP, together with its subsidiairy, Rendel, is responsible for the independent category 3 verification of the tunnel.

This mission includes validation of the design studies and independent checks of the critical structures (tunnel, viaducts), helping to identify and mitigate risks.