Seattle District Header Image


Home > Missions > Civil Works > Dredging > Disposal

Puget Sound Disposal Sites

Puget Sound sites

Semi-Annual Dredge Meeting

The most recent Semi-Annual Agency & Tribal Coordination Meeting for federal navigation projects was held on June 25, 2015.  Click on the links below for PDF files of the agenda & presentations.  Thank you so much for your participation!

Dredging Project Updates:

Disposal Site Updates: 

Other Navigation Project Updates: 

Contact the DMMO


Mailing Address Seattle District
Dredged Material Management Office
PO Box 3755
Seattle, WA 98124-3755
Phones 206-764-6083

Summary of DMMP Disposal Sites

 Click on site name for map and coordinates.

Water Body Site Name Site Type
Puget Sound Anderson/Ketron Nondispersive
Bellingham Bay Nondispersive
Commencement Bay Nondispersive
Elliott Bay Nondispersive
Port Gardner Nondispersive
Rosario Strait  Dispersive
Port Townsend Dispersive
Port Angeles Dispersive
Grays Harbor Point Chehalis Dispersive; Estuarine
South Jetty Dispersive; Estuarine
Half Moon Bay Beneficial Use
South Beach Beneficial Use
3.9-Mile SW Dispersive; Ocean Site
8.0-Mile SW (Inactive) Dispersive; Ocean Site
Willapa Bay Cape Shoalwater Dispersive; Estuarine
Goose Point Dispersive; Estuarine

Dispersive Disposal Site Fate and Transport Analysis

The DMMP investigated the fate and transport of dredged material placed at the dispersive dredged material placement sites within the Strait of Juan de Fuca and Puget Sound using site specific sediment data and a recent numerical model developed for the Puget Sound Basin.  This study, completed in September 2012, was to determine if hydrodynamic conditions indicated the potential for dredged materials to be transported in the vicinity of critical shellfish habitat identified by the Lower Elwha Klallam Tribe (LEKT) near Port Angeles, Sequim, and Port Townsend, Washington.  Links to the final study report are here: