Aquatic Barrier Prioritization ToolAquatic Barrier Tool

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Download Aquatic Barrier Data

To select a different area for download or perform a custom prioritization, use the Prioritize page.

The following download options include the latest available data within this tool. These data are subject to change at any point due to improvements to the inventory of aquatic barriers or improvements to the network connectivity analyses used by this tool. These data include priorities evaluated at the regional (Southeast only) and state levels.

The inventory consists of datasets from local, state, and federal partners. It is supplemented with input from partners with on the ground knowledge of specific structures. The information on barriers is not complete or comprehensive and depends on the availability and completeness of existing data and level of partner feedback. Some areas are more complete than others but none should be considered 100% complete.

Data Version: 2.4.5 (2/10/2022)

Contact Us if you discover any issues with these data, need assistance interpreting or applying these data, or would like to contribute data.

Please review the Terms of Use before downloading data.

Inventoried damsReconned damsInventoried road-related barriers
Alabama25,9281,0482,779
Arkansas11,4163363,390
Arizona4803240
Colorado2,94316400
Florida6,7811,8591,680
Georgia57,0003,6931,278
Iowa4,4311610
Kansas6,38511,469
Kentucky10,093116953
Louisiana6,792181,826
Missouri23,238119,769
Mississippi23,1433,7111,007
Montana3,98022,139
North Carolina27,2884,6762,137
North Dakota3,83321276
Nebraska7,65210
New Mexico5111917
Oklahoma32,31217779
Puerto Rico390497
South Carolina19,0392,2701,348
South Dakota2,564147
Tennessee8,9871,0641,582
Texas71,01735592
Utah3,05856411
Virginia21,7471592,921
Wyoming10,012981,006
Total391,02019,28037,953

33,440 inventoried dams and 1,254 inventoried road-related barriers were not analyzed because they could not be correctly located on the aquatic network or were otherwise excluded from the analysis. You can optionally include these in your download.

Note: These statistics are based on inventoried dams and road-related barriers. Because the inventory is incomplete in many areas, areas with a high number of dams may simply represent areas that have a more complete inventory.