Aquatic Barrier Inventory & Prioritization Tool

Aquatic Barrier Tool

Across the full analysis area, there are:

509,732 inventoried dams, including:

  • 30,105 that have been reconned for social feasibility of removal
  • 462,299 that have been analyzed for their impacts to aquatic connectivity in this tool
  • 1,277 that have been removed or mitigated, gaining 80,473 miles of reconnected rivers and streams

Click on a summary unit the map for more information about that area.

Search for hydrologic unit:

Note: These statistics are based on inventoried dams. 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.

47,433 dams were not analyzed because they could not be correctly located on the aquatic network or were otherwise excluded from the analysis.