INNOVATION May-June 2021

Each year, in our Project Highlights edition, Innovation showcases the engineering and geoscience work of our registrants here in BC and around the world. Innovation and the Engineers and

SECOND NARROWS WATER SUPPLY TUNNEL The Second Narrows Water Supply Tunnel will increase Metro Vancouver’s capacity to accommodate future regional growth while also improving the overall seismic resiliency of its existing potable water distribution infrastructure. This project is one of five new regional water supply tunnels that are being constructed to meet current seismic standards to ensure the reliable delivery of drinking water in the region in the event of a major earthquake. The new water supply tunnel is approximately 6.5 metres in diameter and 1,100 metres long. It is being excavated using a pressurized face tunnel-boring machine designed to excavate through soils and bedrock under high groundwater pressure, from the north shaft in the District of North Vancouver to the south shaft in the City of Burnaby. Owner: Metro Vancouver. Participants: McMillen Jacobs: Andrew McGlenn, P.Eng., Fred Marquis, P.Eng., Greg Emslie, P.Eng., Michelle van der Pouw Kraan, P.Eng., Nicky Erdle, P.Eng. Contractor: Traylor-Aecon General Partnership. Geoscientists BC Editorial Advisory Committee thank all who submitted project photographs and descriptions. 2020 | 2021 PROJECT HIGHL IGHTS

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