For more information about the Sediment Management Program, please contact John Phillips.

Wastewater Treatment Division 
King Street Center
Suite 0505
201 South Jackson Street
Seattle, WA 98104

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Duwamish/Diagonal Project Photos

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Duwamish Dredge
Dredging operations near the Diagonal storm drain and Duwamish CSO. December 3, 2003

Duwamish Dredge
Contractor dredged from the shoreline to the navigation channel of the Lower Duwamish Waterway. December 3, 2003

Duwamish Dredge
A 10-cubic yard bucket removed 68,250 cubic yards of contaminated sediment near the old outfall of the Diagonal Treatment Plant. December 3, 2003

Duwamish Dredge
Sediment was loaded on barges and sent to a specially designed landfill. December 3, 2003