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Water Body
Site Name
Site Type
Status
Puget Sound
Anderson/Ketron
Nondispersive
Open
Bellingham Bay
Inactive
Commencement Bay
Elliott Bay
Port Gardner
Rosario Strait
Dispersive
Port Townsend
Port Angeles
Grays Harbor
Point Chehalis
Dispersive; Estuarine
South Jetty
3.9-Mile SW
Dispersive; Ocean Site
Unused
Willapa Bay
Cape Shoalwater
Goose Point
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:
Full Monitoring at the Anderson/Ketron Islands PSDDA Disposal Site - December 2005
Anderson-Ketron PSDDA Disposal Site Fate and Transport Modeling - September 2014
Dredged Disposal Site Biological Characterization: 2014-2015 Trawl Study at the Anderson/Ketron Island Disposal Site - April 2016
This status paper was presented at the 2022 SMARM and is meant to be a reference document. It summarizes disposal site use, monitoring events and monitoring results from the eight DMMP disposal sites in Puget Sound since the beginning of the program.
Disposal Site History 1989-2021: Use, Monitoring, and Issues
The Final Data Report was finalized in July 2021 and revised in March 2022 to correct errors in several of the tables in the Foreword. The revised version is now available:
2020 Pilot Study: DMMP Monitoring of the Port Gardner Non-Dispersive Unconfined Open-Water Dredged Material Disposal Site, revised 3/29/22
Appendix B: SPME Special Study Results
Additional appendices are available upon request. Please contact the DMMO.
The Final Data Report was finalized in March 2018 and is now available:
2017 Tiered-Full Monitoring at the Commencement Bay Non-Dispersive Unconfined Open-Water Dredged Material Disposal Site
Appendices are available upon request. Please contact the DMMO.
The Final Data Report was finalized in August 2014 and is now available:
2013 Partial Monitoring at the Elliott Bay Non-Dispersive Unconfined Open-Water Dredged Material Disposal Site (29 MB)