![]() ![]() The conditions that existed at this industrial site have been documented since the 1950’s and as a result of past historical activities, toxic pollutants became fixed into the sediments that existed offshore. The removal of the sediment from the river bottom occurred in three separate phases between May of 2002 and December 2004. Plans to remove the contaminated sediments were then approved by Environment Canada and the Ontario Ministry of Environment (OMOE) and a Certificate of Approval was issued for the work to be done. ![]() In the past, this particular Project site had been part of a targeted Remedial Action Plan (RAP) shared by Canada and the United States that was identified as one of (42) Areas of Concern AOC) in the Great Lakes Region. Clair River is a 40.5-mile-long river in central North America which drains Lake Huron into Lake St Clair, forming part of the international boundary between the Canadian province of Ontario and the U.S. That meant the goal was to develop a dredge utilizing the EDDY Pump that could run parallel to the shore and be capable of removing the contaminated layer of material only and not the soft clay substrate. in depth and were resting on top of soft highly plastic clay. The layers of contaminants ranged from 3-in to over 9-ft. The contaminated sediment was spread over a very uneven underwater landscape with large slopes up to 45 degrees. ![]() The requirements of the job were extremely challenging and would involve engineering and constructing custom-designed equipment. URS contacted EDDY Pump (TM Technologies) and presented the problem. Dow then contracted URS Corporation to help them come up with a solution to their complex problem. Many technologies were analyzed and a few were tried but with limited success. Clair River Environmental Cleanupĭow Chemical Canada decided to be proactive and find a way to clean up some 3,000-ft. ![]()
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