Great Plains & Intermountain West Region
Includes 9 states with:
107,141 inventoried dams, including:
- 343 that have been reconned for social feasibility of removal
- 179 that have been removed or mitigated, gaining 28,126 miles of reconnected rivers and streams
1,055,960 or more potential road-related aquatic barriers, including:
- 9,096 that have been assessed for impacts to aquatic organisms
- 6,018 that are likely to impact aquatic organisms
- 1,006 that have been removed or mitigated, gaining 6,853 miles of reconnected rivers and streams
Progress toward restoring aquatic connectivity:
Statistics by state:
| Inventoried dams | Reconned dams | Assessed road-related barriers | |||
|---|---|---|---|---|---|
| Colorado | 13,971 | 64 | 824 | ||
| Iowa | 4,429 | 28 | 10 | ||
| Kansas | 22,443 | 2 | 1,475 | ||
| Montana | 15,590 | 47 | 3,842 | ||
| Nebraska | 16,784 | 5 | 5 | ||
| North Dakota | 6,446 | 28 | 189 | ||
| South Dakota | 18,270 | 5 | 484 | ||
| Utah | 3,579 | 72 | 722 | ||
| Wyoming | 10,058 | 120 | 1,555 | ||
| Total | 107,141 | 343 | 9,096 |
5,850 inventoried dams and 2,014 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.
Data Sources
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 Great Plains & Intermountain West region.