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News and Information

Lake Superior Regulation

Lake Superior Outflow and Compensating Works Gate Settings for April 2017

The May 2017 Lake Superior outflow is 2,060 cubic meters per second (72,748 cubic feet per second), effective May 2, 2017.

The gate setting of the Compensating Works will be remain at a two-gate open equivalent setting.


Water Level Summaries

Current Water Level Summary                                                 

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Great Lakes Update Articles

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Conveyance Change Analyses 


Great Lakes Datum Information

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