The East Waterway, located in Seattle, WA, is one of the most active commercial waterways in the Pacific Northwest, supporting shipping and water-based industries. Most vessel traffic consists of shipping container vessels and tugboats.
The members of the East Waterway Group (the Port of Seattle, the City of Seattle, and King County) are pleased that the U.S. Environmental Protection Agency (EPA) has released its Interim Record of Decision for cleanup of the East Waterway at the mouth of the Duwamish River and we are reviewing the Interim Record of […] Read More
Serves ecological functions as a deep-water estuary at the mouth of the Duwamish River.
Is part of the Muckleshoot Indian Tribe’s and Suquamish Tribe’s usual and accustomed fishing area, with treaty-protected uses including a commercial fishery for salmon as well as ceremonial and subsistence uses.
Provides public fishing access to the waterway from the Spokane Street Bridge. Learn more about safe seafood consumption In the East Waterway.
The East Waterway is part of the larger Harbor Island Superfund Site. The U.S. Environmental Protection Agency is overseeing cleanup of the East Waterway to remove and remediate historical contaminants that threaten human and environmental health. The EPA is the lead for this important cleanup project, and the East Waterway Group has been implementing site investigations to support the cleanup.
East Waterway Group is composed of the below organizations:
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The East Waterway is being cleaned up due to unacceptable risks to human health and to the environment. Sediments at the bottom of the waterway contain contaminants that include polychlorinated biphenyls (PCBs), arsenic, dioxins/furans and carcinogenic polycyclic aromatic hydrocarbons (cPAHs) that pose risk to human health. There are 29 contaminants, including PCBs and mercury, which pose risks for benthic invertebrates that are the base of the food chain. PCBs also pose risk to fish within the waterway.
Most of the sediment contamination in the East Waterway is from historical releases during more than 100 years of industrial and commercial activity along and upstream of the waterway.
The Port, City and the County have spent decades reducing sources of contamination and continue to take actions in the storm water drainage system, and to control combined sewer overflows, to further reduce contamination.
The EPA released its Interim Record of Decision (ROD) for cleanup of the East Waterway. The Interim ROD includes a Responsiveness Summary, in which EPA responds to public comments they received. The next step following the Interim ROD is Remedial Design (RD). During the RD, scientists and engineers gather more data about contamination and site conditions in the East Waterway. Engineers use these data to refine which areas need cleanup and decide which cleanup technologies can be used to meet EPA’s cleanup plan requirements in specific locations.
