Brightwater Shoreline tunnel almost complete

Sunday, February 21, 2010

The Shoreline Tunnel B4, which runs from Point Wells to Ballinger, is within 130 feet of the portal in the Ballinger business district. Known also as the West Tunnel, the tunnel boring machine named "Elizabeth" has been trouble-free, without the mechanical breakdowns which plagued other machines in other tunnels of the Brightwater project. Residents along the route were occasionally able to hear a low noise if they were outside during times when street traffic noise was minimal. Paul D. Hill, whose property is along the route, said that "It sounded like a sump pump." Brightwater staff confirmed that he was hearing the tunnel boring.

 Construction began on the four-mile tunnel at Point Wells. All dirt from the excavation has been off-loaded to barges at Point Wells. The photo shows the conveyance lines, temporary dock, and a barge.

Photos courtesy of King County Brightwater project. Top photo shows the Elizabeth Tunnel in Shoreline.


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