Aecon JV wins contract for Second Narrows Water Supply Tunnel in Canada

WCN Editorial Team 2 Nov 2018 NORTH AMERICA ENERGY & UTILITIES

A joint venture between Canadian construction company Aecon (40%) and American heavy civil construction company Traylor Bros (60%) has won a $267m contract from Metro Vancouver (Greater Vancouver Water District) for the Second Narrows Water Supply Tunnel project in British Columbia, Canada.

Metro Vancouver is constructing the new water supply tunnel to meet growing demand for drinking water in the region.

The tunnel will be constructed under the Burrard Inlet, east of Iron Workers Memorial Bridge between the Metro Vancouver works yard in the District of North Vancouver and Montrose Park in the City of Burnaby.

The scope of work includes the construction of two shafts, one on each side of Burrard Inlet, connected by a 1,100m tunnel.

A tunnel-boring machine will be used to excavate the new water supply tunnel.

The north entry shaft will be constructed in North Vancouver and approximately 60m deep, while the south exit shaft will be in Burnaby and approximately 110m deep.

After the tunnel is drilled, three steel water mains will be installed inside the tunnel and connected to underground valve chambers at each shaft site, and into the region’s drinking water system.

It will be one of five new water supply tunnel crossings in the region and these will be built to withstand a major earthquake.

The Metro Vancouver works yard has been chosen as the North Vancouver location for the shaft and valve chamber to reduce impact on the neighbourhood.

When completed, the tunnel will increase the capacity of the existing system to ensure the continued, reliable delivery of clean, safe drinking water in the region, and will meet current seismic standards.

Work will commence in November 2018 and the project is expected to be completed by the end of 2023.

Aecon Group president and CEO Jean-Louis Servranckx said: “We look forward to successfully and safely delivering this complex, multi-year project for Metro Vancouver to ensure the continued, reliable delivery of clean drinking water to member jurisdictions.

“This award further advances Aecon’s recognized reputation as a partner-of-choice for tunnelling projects, while expanding our solid presence in Western Canada working on large-scale critical infrastructure projects.”

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Image: The Second Narrows Water Supply Tunnel project. Photo: Courtesy of Metro Vancouver.

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