Corps of Engineers to begin Keystone Harbor maintenance dredging October 12

Published Oct. 9, 2020

The U.S. Army Corps of Engineers will begin maintenance dredging in the Federal navigation channel at Keystone Harbor. The contractor, American Construction, will start dredging Oct. 12 and continue for approximately nine weeks.  

The goal is to dredge roughly 50,000 cubic yards and place the material along the shoreline on the east side of the harbor for beneficial use. Dredging will only occur at night between 9:10 p.m. to 6:45 a.m. to accommodate daytime ferry vessel traffic. 

Dredged material will be offloaded into the temporary stockpile area and will then be transported to the upland beach nourishment placement site during daylight hours. During the dredging, a gate for boat traffic will be temporarily installed by American Construction. If a boater needs to launch a boat, the gate will be opened by American Construction.

About the U.S. Army Corps of Engineers

One of the Seattle District’s primary missions is to maintain the navigation channels and harbors in the Pacific Northwest. Maintenance and navigation dredging is done frequently in harbor areas, ports and marinas.  A significant component of Washington’s economy depends on navigation and commerce, which in turn depends on dredging navigation channels.

Dallas Edwards

Release no. 20-122