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Cleanup at Lockheed West Seattle

The Lockheed West Seattle Superfund remedial action began on August 13, 2018. The site is located at the head of the West Waterway of the Duwamish on Elliott Bay.  The Lockheed Martin Corporation started the cleanup by removing pilings in the shipway near the shoreline and debris throughout the site. They then dredged contaminated sediments within a 15-acre area that is predominantly intertidal area, shipway and dry docks.  A thin-layer of dredge material residual layer/enhanced natural recovery layer was placed throughout the 40-acre site.  Transloading facilities on the Lower Duwamish Waterway sent the material for final disposal to Rubanco and/or Columbia landfills.  Work for the first cleanup construction season will be completed in March 2019.

The second season will begin in September 2019 and continue through February 2020. It will include additional dredging and disposal of contaminated sediments, covering the dredged areas with clean sediments and also adding a layer of clean sediments across the remainder of the site which is 40-acres total.

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Public Participation Opportunities

The Community Involvement Plan provides an overview of the engagement tools and techniques that we will use throughout the Superfund cleanup of Lockheed West Seattle and other sites near Harbor Island.

Lockheed Martin is conducting cleanup of the Lockheed West Seattle site; information about their work on the cleanup can be found on their website.

Lockheed Martin Corporation maintains a phone hotline for the public to report concerns and ask questions regarding the Lockheed West Seattle cleanup: (800) 449-4486

Throughout the cleanup, the EPA wants to engage with the public, the land and water-based business community near the Lockheed West Seattle site, and interested community groups about the implementation actions related to the Lockheed West Seattle cleanup. Join the email list to receive the latest information about cleanup activities, public meetings, and other information about the Lockheed West Seattle cleanup. Please contact the Community Involvement Coordinator, Julie Congdon at or 206.553.2752 if you have questions or wish to be added to the mailing list.

Site documents are available for review at:

EPA Region 10 Superfund Records Center
1200 Sixth Avenue, Suite 155, ECL-076
Seattle, WA 98101

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