St. Clair River Mercury-Contaminated Capping

Construction Documents

Instead of hydraulic dredging, the consultant recommended adding an erosion-resistant cover of washed, fine gravel to three areas of river bottom with the highest mercury concentrations, Moroney has said. That approach is expected to meet the project s original goals and avoids risks that come with dredging, like re-suspending contamination in the river, he has said. A 2021 report identified three priority areas for the work: Near the TransAlta site (formerly Dow Canada) and Suncor s site Nea...