Access Flood Maps

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Identify the data available to your community using the map on the right. Landowners are encouraged to work with their permitting authority to access the best available flood maps.

County Information

Digital Flood Insurance Rate Map (DFIRM) Counties

Interactive floodplain maps are available through FEMA's Map Service Center (MSC). Many of the same resources, as well as GIS data are available at the DNR's FTP site.

Paper Map Counties

Visit the FEMA Map Service Center to view and print maps and Flood Insurance Studies (FIS).

Unmapped Counties

There are no flood maps available in unmapped counties.


Estimated 1% Base Flood Elevations

Estimated 1% Base Flood Elevations provide model-based elevations for many effective A-Zones or stream reaches not yet mapped. This dataset is available to GIS users through Minnesota Geospatial Commons (MnGeo). These "pink lines" are not reflected on the official flood maps, they should be used for regulatory purposes as best available data. The data does not identify floodway and flood fringe boundaries, which should be determined through consultation with DNR staff or independent analysis. A major "Countywide Modernization" effort is underway to significantly expand this dataset as represented in the Minnesota map above.


Preliminary DFIRMs

Communities that have not yet completed the map update process can access preliminary data through the DNR's FTP site. Preliminary data should be used for regulatory purposes in areas where they show higher flood levels than what's shown on the effective FEMA maps.


Countywide Modernization

The Countywide Modernization effort is underway and will expand the dataset for the Estimated 1% Base Flood Elevations and update floodplain delineations for Zone AE (detailed modeling) areas. This modernization effort may involve other resources for some areas.