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general information
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Contact information
For more information about data viewer mapping, contact:
DNR Dam Safety
DNR Dam Safety Program, WT/3
101 South Webster Street
PO BOX 7921
Madison WI 53707–7921

Data viewer (mapping)

The DNR Dam Safety program’s mapping application allows the public access to the Wisconsin Dams database.

Once you find the dam of interest and you are zoomed in to at least 1:24,000, choose the identify button in the tool bar and click on the "yellow dot" which signifies the dam. Information on this dam is now shown in the left sidebar entitled "Identify Results." If you scroll down on this information, you will find a heading for "Representative Photo" which may have a link to the right entitled "more data." If there is a link and you click on this link, the photo of the dam will appear.

The DNR Floodplain Management program’s mapping application allows the public access to the Wisconsin Floodplain Analysis database. Floodplain Insurance Studies and Engineering Input Models are available for download through the ’Identify Results’ information of the flood study and bridge location lines and points. Note: FEMA maps displayed on this website are not official maps and should not be used for zoning purposes.

Once you find the floodplain of interest, and you are zoomed in to at least 1:150,000, choose the identify button in the tool bar and click on the "red dot" which signifies the dam. Information on this floodplain is now shown in the left sidebar entitled "Identify Results."

Go to FEMA’s Map Service Center [exit DNR] to download the official, effective Flood Insurance Rate Maps (FIRMs) or Digital Flood Insurance Rate Maps (DFIRMs) where available.

Geographic Information Systems

Below is a shapefile of Wisconsin dams that can be used in ArcGIS. The shapefile contains points which represent the locations for all dams recorded in the dam safety database. The shapefile is updated occasionally, so make sure check back for the most up to date version.

Click on the link to download a zipped version of the shapefile, metadata and associated files. It is recommended that you save this zip file to your hard drive, and open it from there.

Database downloads

Check for recent data downloads to see if the information you are looking for can be found in this spreadsheet. Please save the data to your local drive before viewing!

  1. Statewide Dams [ZIP]– Updated 10/2014
  2. Data dictionary [PDF] – this document will help users decode the field names in the data downloads listed above.

For more information on Geographic Information Systems and other available DNR GIS layers, visit the GIS page

Last revised: Monday October 06 2014