Pacific Southwest Region
(in development)
Includes 2 states with:
10,342 inventoried dams, including:
- 9 that have been reconned for social feasibility of removal
- 100 that have been removed or mitigated, gaining 2,636 miles of reconnected rivers and streams
577,608 or more potential road-related aquatic barriers, including:
- 16,483 that have been assessed for impacts to aquatic organisms
- 3,295 that are likely to impact aquatic organisms
- 290 that have been removed or mitigated, gaining 2,661 miles of reconnected rivers and streams
Statistics by state:
| Inventoried dams | Reconned dams | Assessed road-related barriers | |||
|---|---|---|---|---|---|
| California | 8,491 | 1 | 12,847 | ||
| Nevada | 1,851 | 8 | 3,636 | ||
| Total | 10,342 | 9 | 16,483 |
6,085 inventoried dams and 478 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 Pacific Southwest region.