Instead of dumping the dredged sediment on land it was dispersed in the water, he said. The algae was linked to an excess of phosphate in the water from agricultural run-off.Īccording to Ciparis, dredging by the Army Corps of Engineers disrupted the lake bottom and compounded the problem, resulting in blue-green blooms that were visible from space. In 2014, algae blooms engulfed parts of Lake Erie and forced Toledo, Ohio to shut its water intakes because of the presence of liver-damaging microcystins. The IJC has organized a series of meetings on both sides of the border to gather feedback from residents on the Great Lakes. “I was sort of astounded,” Ciparis said at a meeting of the International Joint Commission (IJC) last week at Sarnia’s Lochiel Kiwanis Community Centre. In Lake Erie, dredging has been linked to the growth and spread of algae in recent years, said Don Ciparis of the National Farmers Union. Sarnia went to great lengths to properly dispose of sediment scooped up during this winter’s $3-million dredging project, but that’s not always the case in the Great Lakes.
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