In 2007, the International Joint Commission launched a five-year study to look at future water levels in the upper Great Lakes and the options for regulating those levels to support the region’s economic and environmental interests. In the entire upper lakes basin, water levels are currently influenced through a regulation plan at the St. Marys River control structures at Sault Ste. Marie, where Lake Superior outflows have been regulated since 1914.
Please view the Progress Report from the International Upper Great Lakes Study at this link
More information about the International Upper Great Lakes Study on their website: http://www.iugls.org/
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