A $1.05B remediation project
With combined remedies, this project is expected to substantially reduce cancer risk from exposure to contaminated sediment.
Practices
A targeted sediment remediation solution to address a long-term contamination problem
Contamination of the Willamette River dates back to the 1920s and is extensive enough to make it one of the nation’s largest Superfund sites. Since 2007, CDM Smith has provided technical support on remediation designs and actions plans for the EPA to address this complex cleanup across a 10-mile stretch of the river.
365 acres of contaminated sediment
The site is composed of 2,220 acres over a 10-mile reach, with large amounts of contamination requiring remedial construction.
Coordinated action across 120+ PRPs
The project involves coordination among state and federal agencies, over 120 PRPs and tribal governments.
Endangered species habitat at risk
This project protects the lower Willamette River, a habitat for endangered species like Chinook salmon and Steelhead trout.
In order to support EPA’s feasibility study on the Portland Harbor site, CDM Smith provided technical expertise across source consideration, sediment and contamination evaluation. Collaborating with U. S. Army Corps and EPA, our team tailored remediation strategies based on specific site conditions, improving long-term safety and reducing exposure risks for local communities. The reduced risk and exposure to toxins within the sediment will make the surrounding communities a safer and cleaner place to live, work and play in.
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