National

Aquatic Barrier Inventory & Prioritization Tool

Aquatic Barrier Tool

Photo: Zach Dutra

How to prioritize barriers:

1

Select area of interest.

You can select areas using state, county, and watershed boundaries.

Prioritization is limited to areas with dams or assessed barriers depending on the scenario.

2

Filter barriers.

You can filter barriers by feasibility, height, and other key characteristics to select those that best meet your needs.

3

Explore priorities on the map.

Once you have defined your area of interest and selected the barriers you want, you can explore them on the map.

4

Download prioritized barriers.

You can download the inventory for your area of interest and perform offline work.

Prioritization scenarios available:

Dams

Prioritize dams based on aquatic networks cut by dams and waterfalls.

Road-related barriers

Prioritize road-related barriers based on aquatic networks cut by dams, waterfalls, and road-related barriers with at least moderate barrier severity.
71,181 available

Dams & road-related barriers

Prioritize dams and road-related barriers based on aquatic networks cut by dams, waterfalls, and road-related barriers with at least moderate barrier severity.
552,172 available

Large-bodied fish barriers

Prioritize dams and road-related barriers that are likely to impact large-bodied fish species based on aquatic networks cut by dams and waterfalls that do not have partial or seasonal passability to salmonids and non-salmonids, and road-related barriers with severe or significant barrier severity.
529,631 available

Small-bodied fish barriers

Prioritize dams and road-related barriers based on aquatic networks cut by dams, waterfalls, and road-related barriers with at least minor barrier severity.
565,779 available