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 826–850 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ocean Lake Habitat No. 6 Fremont County | 9 | 1973 | Low | Poor |
| Odegard 6-12-55-77 Sheridan County | 29 | 2010 | Low | Fair |
| Oil Well Stock Sheridan County | 26 | 1969 | Low | Fair |
| Okeson Campbell County | 36 | 1945 | Low | Fair |
| Okie Draw Dam Natrona County | 26 | 1964 | Low | Unsatisfactory |
| Old Smuggler Albany County | 22 | 1956 | Low | Fair |
| Ollie Stock Sheridan County | 25 | 1963 | Low | Poor |
| Orchard Washakie County | 30 | 1925 | Low | Fair |
| Orchard Washakie County | 42 | 1941 | Low | Fair |
| Orr Crook County | 33 | 1976 | Low | Fair |
| Oshoto Crook County | 23 | 1954 | Low | Fair |
| Outer Drive Flood Detention Natrona County | 50 | 1980 | Low | Fair |
| P16-5 Reservoir Campbell County | 49 | 2006 | Low | Poor |
| Pacific No. 2 Fremont County | 18 | 1922 | Low | Poor |
| Paddy No. 1 Niobrara County | 29 | 1963 | Low | Poor |
| Paddy No. 2 Niobrara County | 30 | 1963 | Low | Poor |
| Padlock Wastewater Recovery Sheridan County | 47 | 1985 | Low | Fair |
| Paint Creek Park County | 20 | 1911 | Low | Fair |
| Parkman Disposal Johnson County | 60 | 1985 | Low | Fair |
| Parks No. 1 Campbell County | 34 | 1915 | Low | Unsatisfactory |
| Pass Johnson County | 36 | 1959 | Low | Poor |
| Pat Johnson County | 36 | 1958 | Low | Poor |
| Patch Johnson County | 44 | 1958 | Low | Poor |
| Patra No. 3 Campbell County | 24 | 1925 | Low | Poor |
| Patrick Ryan No. 3 Albany County | 27 | 1970 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.