SECTOR | TRANSPORT, WATER - CANADA
CANADA ADVANCES TUNNEL PROJECTS
Across the nation, Canada is driving ahead on a number of underground infrastructure projects that include a range of transport and water tunnels, and more
A range of tunnel projects have been advancing across Canada in recent months, including in Vancouver, Montréal, Toronto and Darlington. In Vancouver, the main civils works for the Second Narrows Water Tunnel project has reached substantial completion. Whereas in Montréal, for the Blue Line Extension
Below:
Civil works substantially complete for JV at Second Narrows Water Supply Tunnel, Vancouver
project, preparations for main tunnelling are advancing with transport of the TBM to site. Assembly of the shield is underway for launch in 2026. Also in preparation is tunnelling for cooling water
tunnel at a new nuclear power project in Darlington, Ontario. The TBM to bore the tunnel has arrived on site. Also in Ontario, construction preparations continue, in Toronto for the Ontario Line.
With so much achieved on underground projects over
many decades, the Tunnelling Association of Canada (TAC) has launched a pilot mentorship program for experienced engineers to help younger tunnelers (see box).
VANCOUVER - WATER TUNNEL The Traylor Bros and Aecon joint venture working on Vancouver’s Second Narrows Water Supply Tunnel has reached substantial completion on construction. The new Metro Vancouver water supply tunnel is 6.5m in diameter, just over 1km long, and contains three new large-diameter steel water mains. The mains are designed to withstand a one-in-10,000- year earthquake and deliver more than one million
26 | January 2026
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