National

Aquatic Barrier Inventory & Prioritization Tool

Aquatic Barrier Tool

Photo: Zetong Li

Alaska Region

(in development)
Alaska region map
Map of 126 inventoried dams and 1,194 road-related barriers likely to impact aquatic organisms in the Alaskaregion.

Includes 1 state with:

126 inventoried dams, including:

  • 0 that have been reconned for social feasibility of removal
  • 17 that have been removed or mitigated, gaining 28 miles of reconnected rivers and streams

9,993 or more potential road-related aquatic barriers, including:

  • 1,198 that have been assessed for impacts to aquatic organisms
  • 1,194 that are likely to impact aquatic organisms
  • 930 that have been removed or mitigated, gaining 928 miles of reconnected rivers and streams

Progress toward restoring aquatic connectivity:

year removed
show:miles gained|number removed
2023
658 miles*
2022
77 miles*
2021
115 miles*
2020
8.6 miles*
2010-2019
86 miles*
2000-2009
10 miles*
before 2000
0 miles*
unknown
0 miles*
dams
road-related barriers
* includes 898 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.
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
Alaska12601,198
Total12601,198

103 inventoried dams and 1,192 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 theAlaska region.