Port Mann Water Supply Tunnel – tunnelling process now completePort Mann Water Supply Tunnel – tunnelling process now complete<div class="ExternalClass4C6AC876DA53469F89E4577BABAE43C4"><p>​The Port Mann Water Supply Tunnel was excavated by a tunnel boring machine, similar to the machinery used to build Metro Vancouver's own recently commissioned twin water tunnels on the North Shore, and the tunnelling process for the Canada Line. For world travellers, similar machinery was used for the UK-France Channel Tunnel (the <em>Chunnel</em>). </p><p>The new tunnel under the Fraser River is 30 metres below the deepest portion of the river bed, seismically resistant, and represents an amazing engineering feet due to the high pressures involved. The tunnel boring machine began its journey under the Fraser River in February 2014, and finished in mid-July. </p><p>Although the tunnel itself is complete, construction continues for the associated valve chambers, welded steel water main and other infrastructure required to bring safe, clean drinking water to our homes and businesses. You can find more information here, including some great video clips on <a href="/media-room/video-gallery/issues/903208003001?utm_source=newsletter36&utm_medium=email&utm_campaign=chair_update" target="_blank">pre-construction planning</a>, <a href="/media-room/video-gallery/issues/2011052151001?utm_source=newsletter36&utm_medium=email&utm_campaign=chair_update" target="_blank">mid-construction diving</a>, and production of the concrete <a href="/media-room/video-gallery/issues/2854145142001?utm_source=newsletter36&utm_medium=email&utm_campaign=chair_update" target="_blank">tunnel lining</a>.</p></div>http://www.metrovancouver.org/metroupdate/PublishingImages/issue12-drill.jpg2015-08-26T07:00:00ZGP0|#0774283d-71f2-4a07-ae02-062bba6e3fd0;L0|#00774283d-71f2-4a07-ae02-062bba6e3fd0|Issue 12;GTSet|#d14ffe11-45dc-48fb-8684-ff109cf15a74<div class="ExternalClassB802610830E6425E9CCFBD7CFDA2D373"><p>​If you drive over the Port Mann Bridge, or use Coquitlam’s Maquabeak Park, you may have seen construction associated with the new Port Mann Water Supply Tunnel project. This new tunnel goes under the Fraser River, and will convey drinking water to communities south of the River. </p></div>0