Sheet Flow Construction Erosion Control

May 29, 2020

Superfund Riverbank Cleanup

Superfund riverbank cleanup at Terminal 117 on the Duwamish Waterway.
Photo: Port of Seattle

We started this superfund riverbank cleanup in 2013, finishing in early 2015. The project involved removing over 40,000 cubic yards of PCB-contaminated soil.

The project was in the inter-tidal zone; the contractor maintained vertical and horizontal separation between the excavation the the tide level.

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