Welcome to the Great Lakes Coastal Flood Study website at greatlakescoast.org. This is the official public website for FEMA's comprehensive storm and wind study of the Great Lakes basin for the purpose of updating the coastal flood hazard information and Flood Insurance Rate Maps (FIRM) for Great Lakes coastal communities. This is the main page of the website and contains the most recent content posted to the site. Use the menu at the left to visit pages with additional content pertaining to the Great Lakes Coastal Flood Study.

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Please visit FEMA's Preliminary Flood Hazard Data page, the Coastal FIRM Tutorial and FEMA's Pending and Preliminary Flood Hazard Layer mapping application.

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Agenda for Lake Michigan Technical Workshops

The Great Lakes Coastal Flood Study recently announced a series of Technical Workshops around the Great Lakes Basin. The agenda for the first batch of workshops is posted below.

The Agenda is also linked on the event listing of each Technical Workshop, and agendas for the rest of the Technical Workshops will be posted soon.

International Upper Great Lakes Study Progress Report

In 2007, the International Joint Commission launched a five-year study to look at future water levels in the upper Great Lakes and the options for regulating those levels to support the region’s economic and environmental interests. In the entire upper lakes basin, water levels are currently influenced through a regulation plan at the St. Marys River control structures at Sault Ste. Marie, where Lake Superior outflows have been regulated since 1914.

Please view the Progress Report from the International Upper Great Lakes Study at this link

More information about the International Upper Great Lakes Study on their website: http://www.iugls.org/

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