The DMMO, or Dredged Material Management Office, is the main point of contact for the interagency Dredged Material Management Program (DMMP).  The DMMP includes all dredged material management programs in the State of Washington: Puget Sound Dredged Disposal Analysis (PSDDA); Grays Harbor/Willapa Bay; the Washington side of the lower Columbia River (with the exception of port districts); and other marine and freshwater locations.

Users' Manual:  The latest Users' Manual is finished!  Click here to go to the download page, or click the menu item at left.

Updated 10/20/08 - See the Dioxin Information page. Dioxin/PCB Sampling aboard the OSV BOLD:  The Dredged Material Management Program (DMMP) agencies conducted a comprehensive sampling program to measure dioxin and PCB concentrations in surface sediments throughout Puget Sound, outside urban bays.   The sampling was conducted in early August, 2008, aboard the EPA Ocean Survey Vessel BOLD.  For more information go to the Dioxin Information Page.