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High Risk Erosion Areas Digital MapsHigh Risk Erosion Areas are those shorelands of the Great Lakes and connecting waters where recession of the zone of active erosion has been occurring at a long-term average rate of one foot or more per year, over a minimum period of 15 years. DEQ staff conducted the initial recession rate research between 1980 and 1986 in order to identify and designate High Risk Erosion Areas. Subsequently, staff began updating the recession rate studies on a county-by-county basis to incorporate changing coastal conditions. The recession rate data are used to calculate appropriate setback distances for coastal construction which are shown on the maps in terms of 30-year and 60-year setbacks. A DEQ permit is required prior to construction in a High Risk Erosion Area. The MDEQ/USACE Joint Permit application is available at www.michigan.gov/jointpermit. Maps of individual townships show the geographic boundaries of the High Risk Erosion Areas. Each township map page shows the along-shore extent of the High Risk Erosion Areas and the corresponding 30-year and 60-year setbacks. For information about properties within city boundaries, refer to the map of the adjacent township. If you are unable to determine whether your property is located in a High Risk Erosion Area, contact the Water Resources Division at (517) 373-1952 for verification. You will be asked to provide the property's tax identification number and location, including the county, township, and subdivision name and lot number, if applicable. Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
Baraga County
Bay County
Benzie County
Berrien County
Charlevoix County
Cheboygan County
Chippewa County
Delta County
Emmet County
Gogebic County
Grand Traverse County
Houghton County
Huron County
Iosco County
Keweenaw County
Leelanau County
Luce County
Mackinac County
Manistee County
Marquette County
Mason County
Menominee County
Muskegon County
Oceana County
Ontonagon County
Ottawa County
Presque Isle County
St. Clair County
Sanilac County
Schoolcraft County
Van Buren County
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