Sediment Management in Washington State

The Aquatic Lands Cleanup Unit (formerly the Sediment Management Unit) of the Toxics Cleanup Program serves as the central planning group for Department of Ecology sediment management activities:

I&J Waterway PSDDA Sediment

Project Description:

This Sampling and Analysis Plan (SAP) provides the scope and methods to evaluate the suitability for open-water disposal of sediments at the I&J Waterway Site (Site) in Bellingham Bay in Bellingham, Washington under the Puget Sound Dredged Disposal Analysis Program (PSDDA) (See site map,

Figure 1-1). This testing is being performed in support of the Sediments

Remedial Investigation and Feasibility Study (RI/FS) occurring at the Site under the oversight of the Department of Ecology (Ecology). The need for disposal is driven by the cleanup at the site, but the design of the remedial activities will be influenced by navigation needs within the waterway and adjacent areas.

Entire report: http://www.ecy.wa.gov/programs/TCP/sites/blhm_bay/sites/I_and_J_Waterway/I&J%20Seds%20RIFS%20App%20B%20Text.pdf

Methods for Collection, Storage, and Manipulation of Sediments for Chemical and Toxicological Analyses

Click here to go to Report: http://www.epa.gov/waterscience/cs/library/toc.pdf


*U.S. EPA. 2001. Methods for Collection, Storage and Manipulation of Sediments for Chemical and Toxicological Analyses: Technical Manual. EPA 823-B-01-002. U.S. Environmental Protection Agency, Office of Water, Washington, DC

Reports from around the Sound: Containment of dredged material at Bremerton Naval Complex

"This presentation describes sediment remediation at the Bremerton Naval Complex (BNC) in Bremerton, Washington. Descriptions are given for state-of-the-art features including environmental clamshell buckets, dGPS guidance systems, precise dump barge positioning, extensive water quality monitoring, and removal of compressed gas cylinders with 72-inch diameter underwater magnet. Contaminated sediment was placed into a confined aquatic disposal pit (Pit CAD) 620 feet by 600 feet by 36 feet below the mudline. Project is permitted under a Corps of Engineers permit with a Biological Opinion from NMFS for protection of threatened Puget Sound Chinook salmon, and a Record of Decision for CERCLA remediation."
"The work was done with equipment that evolved from traditional clamshell dredging and bottom-dump barge placement. This results in cost-effective remediation for large volumes of non-hazardous sediment. The cost for dredging and disposal of 390,000 cy in the Pit CAD and 310,000 cy in open water is about 13 million U.S. dollars. Part 1 describes the remediation work performed from June 2000 through March 2001 with the planned final capping scheduled for 2001. Part 2 discuss how the successes of this project can be used to design future confined disposal facilities for contaminated sediment remediation."

excerpt from:

Confined Aquatic Disposal of Dredged Material at Bremerton Naval Complex 2001 International Containment & Remediation Technology Conference and Exhibition. June 10-13, 2001. Orlando, Florida.

Mark T. Otten, P.E.
Foster Wheeler Environmental Corporation
12100 NE 195th Street, Suite 20
Bothell, WA. 98011

Washington State Dredging and filling guidelines WAC 173-26-231

EXISTING REGULATIONS

Dredging and filling is regulated through 1) Shoreline Environment section which establish where dredging and filling is allowed and for what reasons and 2) Development Standards section which establish development standards for dredging and filling where it is allowed. The requirements of the Shoreline Environment section are summarized in Document 3A. The three subsections of the Development Standards section relating to dredging and filling are below.

http://www.seattle.gov/dpd/static/Dredging%20&%20Filling%2008_11_12%20CAC_LatestReleased_DPDP015710.pdf