Construction - North Kenmore Portal  >>> to construction activities North Kenmore Portal SiteLocated at 80th Ave NE and NE 195th Street in Kenmore In response to growth in our region, King County is building a new wastewater treatment system called Brightwater to serve north King and south Snohomish counties. Brightwater construction activities are centered at five sites: the treatment plant site in Snohomish County near Woodinville; and four conveyance construction sites—called portals—in Bothell, Shoreline, Kenmore, and at Point Wells unincorporated Snohomish County. Underground tunneling will take place between the portals and the construction will not generally be visible. Construction on the entire project started in 2005 and is expected to be completed in 2012. Construction ActivitiesFor this part of the project, construction is centered at the North Kenmore Portal site, located along 80th Ave. NE, near the corner of NE 195th Street in Kenmore. There are three elements to this project: Brightwater portals and pipelines - The system of pipes that brings wastewater to the treatment plant and treated wastewater to Puget Sound is called the conveyance system. To limit construction at the surface, the conveyance pipelines are being built almost entirely below ground in tunnels approximately 40 to 440 feet below the surface. Portals are the access shafts where workers, machines, soil and equipment enter and exit the tunnels during construction. There are four portals located along the conveyance line. Tunnel boring machines (TBMs) - are being used to build these tunnels. These large machines do their work underground, excavating the tunnel and installing a concrete lining as they go. Two TBMs are operating out of the 90-foot deep access shaft at this site: one traveling east, the other west. Material from tunneling is removed at the North Kenmore Portal and trucked away from the site. In early 2010 the county made changes to the tunneling contracts so the tunnel work that was to be completed by the TBM traveling west from the Kenmore Portal (now stopped below Lake Forest Park) will be completed by the West Tunnel contractor. See right side bar for additional information about this work. Connecting to existing pipelines - To connect Brightwater to the county's existing wastewater system, we have built another pipeline, running along Northeast 192nd Street between 73rd Avenue Northeast. and the portal site at 80th Avenue Northeast. This was completed in the summer of 2007. What can you expect during construction?King County is committed to being a good neighbor and will work to minimize impacts to nearby residents during construction. Communities may experience increased truck traffic, construction noise, potential vibrations and dust. To minimize these potential impacts the contractor has installed a screening wall around the North Kenmore portal construction, implemented a traffic management plan approved by the City of Kenmore, erosion control measures, and have installed a wheel wash so that construction vehicles do not track dirt or mud from the site. Contact us if you need more information about BrightwaterFor construction-related questions and urgent issues, contact the construction information line at 206-205-5989 (remember to dial 911 for emergencies) For general questions and information about Brightwater call 206-263-9453, or 711 for TTY access, or email us at: brightwater@kingcounty.gov
King County Brightwater Project
22505 State Route 9
Woodinville, WA 98072
E-mail: Brightwater
Phone: 206-263-9453
TTY Relay: 711
Driving directions to Brightwater project office north of Woodinville. >>>Return to construction activites |
