• Map of Great Lakes Diversions

    Great Lakes Diversions

    The major diversions in the Great Lakes basin that affect water levels are diversions into Lake Superior at Long Lac and Ogoki, the Chicago diversion out of Lake Michigan and a diversion between lakes Erie and Ontario through the Welland Canal.

    Learn More
  • Map of Great Lakes Diversions

    Great Lakes Diversions

    The major diversions in the Great Lakes basin that affect water levels are diversions into Lake Superior at Long Lac and Ogoki, the Chicago diversion out of Lake Michigan and a diversion between lakes Erie and Ontario through the Welland Canal.

    Learn More
  • Image of St. Marys River Control Structures
  • Image of St. Marys River Control Structures

International Lake Superior Board of Control

The International Lake Superior Board of Control is responsible for regulating the outflow of Lake Superior and managing the control works on the St. Marys River.
 

About the Board

Watch the recording of the Great Lakes Water Levels Webinar

The Great Lakes water levels boards hosted a webinar on Friday, August 27.

Watch Now

News Releases

Videos

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Learn More on the New Regulation Plan