Port Mann Tunnel

Fraser River - Canada

Project Name: Port Mann Tunnel – Fraser River – Canada

Customer: McNalley Corporation



McNally/Aecon JV (MAJV) completed tunneling for the Port Mann Water Supply Tunnel, in Vancouver, British Columbia, Canada.  The new main water supply is constructed in a tunnel driven through soil, deep underneath the riverbed. It crosses between Maquabeak Park in Coquitlam on the north side of the river, and Surrey on the south side of the river.

The project’s 3.5m (11.5ft) o.d. Caterpillar EPBM successfully completed the crossing, reaching the shaft on the North Shore of the Fraser River.

The 1000m long tunnel is the first TBM tunneled crossing of the Fraser River, and with EPB pressures of up to 6 bar, was one of the highest EPB pressure tunnels seen to date in North America.

Ballard Marine Construction Tunnel Support Team was brought in early on this project.  Support work initially involved consultation on SAT design and how to perform the project in the most efficient way possible.   In addition to maintaining off site a SAT system for activation, Ballard was also involved in Shaft dive support.