SEATTLE, WA — As part of the Environmental Protection Agency’s (EPA) long-term effort to clean contaminated groundwater, soil, and sediments at the Wyckoff/Eagle Harbor Superfund site, the U.S. Army Corps of Engineers is replacing the deteriorated perimeter steel sheet pile wall.
The replacement perimeter wall will protect the Puget Sound and allow EPA to complete cleanup at the site to protect human health and the environment.
“Environmental stewardship is a large component of the Corps’ mission,” said Major Joseph O’Donnell, Seattle District Deputy Commander. “As the nation’s engineers, we provide technical and engineering expertise to other federal agencies and at Wyckoff, we’ve supported EPA with their cleanup mission for decades.”
The Superfund site, located on the east side of Bainbridge Island, in central Puget Sound, Washington, includes the former Wyckoff Company wood treatment facility and subtidal/intertidal sediments in Eagle Harbor.
The City of Bainbridge Island plans to convert Wyckoff into a usable public park with beach access.
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“Once complete, this project will expand public access on Bainbridge Island and protect critical habitat,” EPA Regional Administrator Emma Pokon said. “We appreciate the Army Corps’ partnership in ensuring clean air, water, and land for our communities.”
The $63.2 million contract, which was awarded September 3, 2024, is scheduled to be completed April 2028.
Decades of exposure to natural elements led portions of the existing wall to deteriorate. The replacement perimeter wall will be made of reinforced concrete (a mixture of soil in-situ with a cement-bentonite grout). Most of the construction will be on the inland side of the existing wall and will not be visible until the existing sheet pile wall is removed.
“Seattle District remains committed to lend our technical expertise to the cleanup, improve the environmental health of Puget Sound, and convert this site into a beautiful park the community can enjoy for many years to come,” O’Donnell said.
