King County Images
Inside the Brightwater east tunnel segment
A snapshot inside the 16-foot-diameter tunnel that will run from North Creek portal in Bothell to the Brightwater plant north of Woodinville. Tunneling crews have so far completed about a third of a mile of tunneling for this portion of the project, which at its deepest point will be 300 feet below ground. The entire Brightwater tunnel will be 14 miles long, running from the treatment plant north of Woodinville to Point Wells near the town of Woodway, with tunnel depths ranging from 40-450 feet.
Crews complete the tunnel lining segment by segment, five feet at a time. The tunnel boring machine will travel up to 50 feet a day.
Inside the Brightwater east tunnel segment
A snapshot inside the 16-foot-diameter tunnel that will run from North Creek portal in Bothell to the Brightwater plant north of Woodinville. Tunneling crews have so far completed about a third of a mile of tunneling for this portion of the project, which at its deepest point will be 300 feet below ground. The entire Brightwater tunnel will be 14 miles long, running from the treatment plant north of Woodinville to Point Wells near the town of Woodway, with tunnel depths ranging from 40-450 feet.
Crews complete the tunnel lining segment by segment, five feet at a time. The tunnel boring machine will travel up to 50 feet a day.