ABSTRACT
In the entire upper lakes basin, water levels are currently infl uenced through a regulation plan at the St. Marys River control structures at Sault Ste. Marie (Fig. 5.8), where Lake Superior outfl ows have been regulated since 1914.
In the entire upper lakes basin, water levels are currently infl uenced through a regulation plan at the St. Marys River control structures at Sault Ste. Marie (Fig. 5.8), where Lake Superior outfl ows have been regulated since 1914.