Brightwater Project - Site and construction activities

Construction will take place at five sites; the treatment plant site, and four portals in Bothell, Shoreline, Kenmore, and at Point Wells. Construction began in the late 2005 and is scheduled to be completed in 2010. The following links provide details on activities at these sites.

Treatment Plant Construction

• Treatment plant site

Conveyance System Construction

This includes the pipes and facilities that bring wastewater to and from the plant, and a marine outfall where treated wastewater is discharged to Puget Sound. To limit disruptions, the system is being built almost entirely below ground in tunnels 40 to 400 feet deep. There are five shafts, called portals, where workers, tunnel boring machines, and materials enter and exit the tunnels during construction.

Ancillary Facility Improvements

Ancillary improvements are upgrades to the existing King County wastewater conveyance system that are needed for the Brightwater project.

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For more information

• The Facilities - overview of the Brightwater Project
• Construction Contracts