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.

Lake Superior Basin Map

News Release

Date

April 03, 2019

The above-average levels coupled with strong winds and waves continue to result in shoreline erosion and coastal damages across the upper Great Lakes system.
News Release

Date

March 01, 2019

Very wet conditions continued across the upper Great Lakes basin in February, and water levels of Lake Superior and Lake Michigan-Huron remain well above average.

News Releases

Latest news on Lake Superior outflows and expected conditions

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Reports

Read the Board's latest reports

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FAQs

Get your questions answered by reading the Frequently Asked Questions section

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Water Levels Data

View the latest information on Great Lakes Water Levels and Forecasts

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Calendar

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Want to learn more about the flow control structures on the St. Marys River? View the Board's Story Map below