National

Aquatic Barrier Inventory & Prioritization Tool

Aquatic Barrier Tool

Southwest Region

Southwest region map
Map of 114,827 inventoried dams and 871 road-related barriers likely to impact aquatic organisms in the Southwest region.

Includes 4 states with:

114,827 inventoried dams, including:

  • 251 that have been reconned for social feasibility of removal
  • 69 that have been removed or mitigated, gaining 2,789 miles of reconnected rivers and streams

947,798 or more potential road-related aquatic barriers, including:

  • 1,493 that have been assessed for impacts to aquatic organisms
  • 871 that are likely to impact aquatic organisms
  • 30 that have been removed or mitigated, gaining 4,259 miles of reconnected rivers and streams

Progress toward restoring aquatic connectivity:

year removed
show:miles gained|number removed
2024
0 miles
2023
913 miles
2022
24 miles
2021
3,636 miles
2020
42 miles*
2010-2019
196 miles*
2000-2009
25 miles*
before 2000
1,903 miles*
unknown
311 miles*
dams
road-related barriers
* includes 18 dams and / or road-related barriers that could not be correctly located on the aquatic network or were otherwise excluded from the analysis; these contribute toward the count but not the miles gained.
Note: counts above may include both completed as well as active barrier removal or mitigation projects.
Explore how many dams or road-related barriers there are in a state, county, or watershed.
Explore dams and road-related barriers that have been removed or mitigated by state, county, or watershed.
Identify and rank dams or road-related barriers that reconnect the most high-quality aquatic networks.

Statistics by state:

Inventoried damsReconned damsAssessed road-related barriers
Arizona2,9643770
New Mexico8,88213941
Oklahoma32,26119791
Texas70,72056591
Total114,8272511,493

2,484 inventoried dams and 192 assessed 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.


You can help!

You can help improve the inventory You can help improve the inventory by sharing data, assisting with field reconnaissance to evaluate the impact of aquatic barriers, or even by reporting issues with the inventory data in this tool.

Contact us to learn more about how you can help improve aquatic connectivity in the Southwest region.