Efficient dredging methods will cut cost of Wisconsin river cleanup

07/30/2009 | Engineering News-Record

Contractors are using an efficient mapping, dredging and filtering system to rid a Wisconsin riverbed of toxins. Tetra Tech is the main contractor, and it expects the process it will use for the nine-year, $600 million Fox River project to cost up to $100 million less than other methods. The goal of the project is to capture only contaminated silt, company officials say.

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