Boeing has completed two seasons of dredging in the Duwamish to restore the waterway near Plant 2. The third season will begin in fall 2014.
Boeing plans to replace 165,000 cubic yards of sediment with clean sand by 2015. This in-water work takes place during specific times of the year when juvenile salmon are not migrating. Boeing also installed a state-of-the-art treatment system at Plant 2 to clean the water removed during the dredging process.
This effort is one of the “early action” cleanup projects which — combined with other early action work managed by the Port of Seattle, City of Seattle and King County — will reduce health risks by half. Dredging is being done under the direction and oversight of the U.S. Environmental Protection Agency and Washington State Department of Ecology.