Wyoming Dams
1,490 dams tracked by the National Inventory of Dams
Total Dams
1,490
High Hazard
100
6.7%
Poor / Unsatisfactory
576
Average Age
62 yrs
Hazard Classification
High100 (6.7%)
Significant104 (7.0%)
Low1,283 (86.1%)
Condition Assessment
Satisfactory45 (3.0%)
Fair752 (50.5%)
Poor / Unsatisfactory576 (38.7%)
Not Rated117 (7.9%)
Federal
193
State
22
Local
82
Private
1,174
Tallest Dams
- Buffalo Bill Dam350 ft
- Seminoe Dam295 ft
- Alcova Dam265 ft
- Kortes Dam244 ft
- Boysen Dam220 ft
High Hazard Dams
- Buffalo Bill DamHigh
- Seminoe DamHigh
- Alcova DamHigh
- Kortes DamHigh
- Boysen DamHigh
Poor Condition Dams
- LapreleUnsatisfactory
- Upper Van TassellPoor
- Hawk SpringsPoor
- EastgatePoor
- BischoffPoor
All Dams in Wyoming
Showing 1051–1075 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Quinn No. 1 Niobrara County | 30 | 1959 | Significant | Fair |
| Rachou Fremont County | 25 | 1940 | Low | Poor |
| Railroad Campbell County | 39 | — | Significant | Fair |
| Railroader Sheridan County | 40 | 2005 | Low | Fair |
| Rainey Albany County | 10 | 1922 | Low | Poor |
| Ramsbottom Johnson County | 34 | 1970 | Low | Poor |
| Raper Draw Johnson County | 29 | 1959 | Low | Fair |
| Rate & Huson Sheridan County | 22 | 1910 | Low | Poor |
| Rathbun Irrigation No. 1 Hot Springs County | 29 | 1956 | Low | Poor |
| Rat No. 1 Converse County | 21 | 1956 | Low | Fair |
| Rattlesnake No. 1 Johnson County | 30 | 1969 | Low | Fair |
| Rawhide Mine Main Campbell County | 28 | 1975 | Low | Fair |
| Rawlins Carbon County | 47 | 1956 | Low | Fair |
| Rawlins Peaking Carbon County | 38 | 1965 | Low | Fair |
| Rawlins Wastewater Treatment Plant (A 1) Carbon County | 17 | 1978 | Significant | Fair |
| Rawlins Wastewater Treatment Plant (A 2) Carbon County | 17 | 1978 | Significant | Fair |
| Rawlins Wastewater Treatment Plant (A 3) Carbon County | 17 | 1978 | Significant | Fair |
| Rawlins Wastewater Treatment Plant (S 1) Carbon County | 17 | 1978 | Significant | Fair |
| Rawlins Wastewater Treatment Plant (S 2) Carbon County | 17 | 1978 | Significant | Fair |
| Rawlins Wastewater Treatment Plant (St1) Carbon County | 17 | 1978 | Significant | Fair |
| Rawlins Wastewater Treatment Plant (St2) Carbon County | 17 | 1978 | Significant | Fair |
| Raw Water Reservoir Sweetwater County | 42 | 2022 | Significant | Satisfactory |
| Ray Creek Crook County | 20 | 1914 | Low | Fair |
| Ray Detention Dam Washakie County | 27 | 2003 | Low | Poor |
| Ray Lake Fremont County | 30 | 1925 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.