lower duwamish waterway

RK 2.5 TO RK 10.8

Sediments in the Lower Duwamish Waterway are contaminated with polychlorinated biphenyls (PCBs), polynuclear aromatic hydrocarbons (PAHs), phthalates, and inorganics. To address the long-term threat these contaminants pose to the human food chain and sensitive river environments, the site was added to EPA's National Priorities or "Superfund" List on September 13, 2001. The Lower Duwamish Waterway Superfund site is located south of Elliot Bay, near downtown Seattle, Washington. The waterway is maintained by the U.S. Army Corps of Engineers as a federal navigation channel. Most of the shoreline along the Duwamish Waterway is industrialized or developed for commercial purposes; however, the residential community of South Park also abuts the shoreline. In addition, over 200 storm drains, combined sewer overflows, and other outfalls discharge to this reach of the river. Historical or current commercial and industrial operations on the waterway include cargo handling and storage; marine construction; boat manufacturing; marina operations; paper and metals fabrication; food processing; and airplane parts manufacturing. Contaminants may have entered the river via spills during product shipping and handling, direct disposal or discharge, contaminated groundwater discharge, surface water runoff, storm water discharge, or contaminated soil erosion. Site Responsibility: This site is being addressed through an administrative order on consent with potentially responsible parties.

• Hocomonco Pond (Westborough, MA)
• Sheboygan Harbor & River (Sheboygan, WI)
• Amcast Industrial Corporation (Cedarburg, WI)
• Puget Sound Naval Shipyard Complex (Bremerton, WA)
• Horseshoe Road (Sayreville, NJ)

• Crater Resources, Inc./keystone Coke Co./alan Wood Steel Co. (Upper Merion Township, PA)
• Shiawassee River (Howell, MI)
• Naval Surface Warfare Center - Dahlgren (Dahlgren, VA)
• Re-solve, Inc. (Dartmouth, MA)