Seymour-Capilano Twin Tunnels Commissioning Seymour-Capilano Twin Tunnels Commissioning <div class="ExternalClass7B8EB7E7F37D4509897E12781A51BA74"><p>​After more than 10 years of construction, final testing of the <a href="/services/water/engagement/construction-projects/twin-tunnels" target="_blank">Seymour-Capilano Twin Tunnels</a> is underway with flushing of the Treated Water Tunnel into the Capilano Reservoir. This testing is required before the Twin Tunnels, an integral component of this system-wide drinking water enhancement project on the North Shore, are put into full operation, which is expected in May.</p><p>The Twin Tunnels are an extraordinary engineering accomplishment. They were constructed beneath <a href="" target="_blank">Grouse Mountain</a> and <a href="" target="_blank">Mount Fromme</a> to allow for water from the Capilano Reservoir to be treated at the new <a href="/services/water/quality-treatment-testing/treatment-facilities/drinking-water-treatment-facilities/Pages/default.aspx" target="_blank">Seymour-Capilano Filtration Plant</a>, located seven kilometres east of the reservoir. Underground and surface construction was required to build the tunnels, which are in the commissioning phase that will last through spring 2015.</p><p>Each tunnel is 3.8 metres in diameter and 7.1 kilometres long. Once fully operational, water from the Capilano Reservoir will be pumped through the Raw Water Tunnel to the filtration plant for treatment, and then returned through the Treated Water Tunnel to the Capilano distribution system for delivery to residents, businesses and institutions.</p><p>When complete in the spring, the Twin Tunnels will help ensure the supply of safe, high-quality drinking water for future generations in Metro Vancouver.</p></div>|#923c98f2-db26-4fa0-8ad4-bed6c5ee91e6;L0|#0923c98f2-db26-4fa0-8ad4-bed6c5ee91e6|Issue 8;GTSet|#d14ffe11-45dc-48fb-8684-ff109cf15a74<div class="ExternalClass4DCDE8D1FF3643C2A29B04CC6E3B0112"><p>​For over a decade, Metro Vancouver has been developing some of the highest-quality<a href="/services/water/Pages/default.aspx" target="_blank"> drinking water facilities and infrastructure </a>in North America on the North Shore area of our region. A major milestone was recently reached. </p></div>