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Over the coming weeks, we will be updating our Great Lakes Information website.

You can expect to see some exciting new pages, along with a reorganization of the site to ease navigation. Page changes will be set up with temporary redirects, but please update any bookmarks you have saved. We hope these improvements will help to better educate, inform, and inspire everyone that visits our site.

If you experience any difficulties finding information you rely on, please contact us at (313) 226-3020 or hhpm@usace.army.mil.

News and Information

Lake Superior Regulation

Lake Superior Outflow and Compensating Works Gate Settings for February 2019

The February 2019 Lake Superior outflow will be 2,560 cubic meters per second (90,405 cubic feet per second), effective 1 February 2019.

The gate setting of the Compensating Works will remain at a two-gate open equivalent for the month of February and throughout the winter.


 WATER LEVEL SUMMARIES                           

Current Water Level Summary                                                 

Past Water Level Summaries                              

Great Lakes Update Articles

The Current Great Lakes Update Article

Past Great Lakes Update Articles


Conveyance Change Analyses 


Great Lakes Datum Information

Document Information and Assistance

NOTICE:  Not all documents accessible via this page are readable using optical character recognition (OCR). For more information and/or assistance please call 313-226-6441.