Port Mann Water Supply Tunnel in operationPort Mann Water Supply Tunnel in operation<div class="ExternalClass4A23552F991440758FE0809C8DDDB7D2"><p>After almost six years of construction, Metro Vancouver’s $240-million Port Mann Water Supply Tunnel has begun delivering clean, safe drinking water to residents south of the Fraser River. </p><p>The Port Mann connection is one of the key links between Metro Vancouver’s watersheds and the communities south of the Fraser. Located more than 30 metres under the Fraser River bed, the new tunnel more than doubles the capacity of the old water main and provides enhanced earthquake and river erosion resiliency.</p><p>The project consists of two 60-metre deep shafts – one in Coquitlam and another in Surrey – connected by a one-kilometre long, 3.5-metre diameter tunnel housing a 2.1-metre diameter steel water main. A new valve chamber was built at the top of each shaft to allow the new tunnel to connect with the existing land-based water mains on either side of the river. </p><p>The tunnel took nearly six years to complete because of challenges with difficult soil conditions and the highest groundwater pressures ever observed in Canadian soft ground tunnelling. The project received the “2016 Canadian Innovation Project of the Year Award” from the Tunnelling Association of Canada. </p></div>http://www.metrovancouver.org/metroupdate/PublishingImages/mu30-tunnel.jpg2017-03-30T07:00:00ZGP0|#4bfff573-f035-496d-a2db-b90f29d95f52;L0|#04bfff573-f035-496d-a2db-b90f29d95f52|Issue 30;GTSet|#d14ffe11-45dc-48fb-8684-ff109cf15a74<div class="ExternalClass9A964841A16F4179804F185ED317CDDB"><p>​Metro Vancouver's $240-million Port Mann Water Supply Tunnel is now delivering clean water to residents south of the Fraser. The Port Mann connection is a key link between Metro Vancouver's watersheds and the communities south of the Fraser.</p></div>0