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 1176–1200 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Unit 3 Fgd Evaporation Pond 1 Lincoln County | 40 | 1990 | Low | Fair |
| Units 1 and 2 Ash and Clear Water Lincoln County | 88 | 1994 | Low | Fair |
| Upper Washakie County | 15 | 1922 | Low | Poor |
| Upper Afton Lincoln County | 25 | 1942 | Low | Satisfactory |
| Upper Cottonwood Dam Fremont County | 14 | 1972 | Low | Not Available |
| Upper Hackett Dam Natrona County | 32 | 1967 | Low | Unsatisfactory |
| Upper North Tisdale No. 1 Campbell County | 17 | 1999 | Low | Fair |
| Upton Weston County | 30 | 1907 | Low | Fair |
| Upton-Osage No. F.S. 9-498-33 Weston County | 24 | 1973 | Low | Fair |
| Upton Wastewater Treatment Weston County | 9 | 1985 | Low | Fair |
| Utter Platte County | 30 | 1972 | Low | Fair |
| Valarie Irrigation Campbell County | 31 | 1962 | Low | Poor |
| V. E. Lissolo Irrigation Weston County | 30 | 1955 | Low | Poor |
| Verona Sheridan County | 55 | 1908 | Low | Poor |
| Vollman 3572-7 Produced Water #2 Converse County | 25 | 2024 | Low | Satisfactory |
| Vollman 3673-33 Produced Water #1 Converse County | 20 | — | Low | Satisfactory |
| Wagner Natrona County | 9 | 1909 | Low | Poor |
| Wagon Hound Converse County | 30 | 1946 | Low | Fair |
| Wagon Prong Dam Washakie County | 36 | 2003 | Low | Fair |
| Wales Hot Springs County | 13 | 1912 | Low | Poor |
| Walker Niobrara County | 21 | 1972 | Low | Fair |
| Wallace No. 2 Niobrara County | 20 | 1958 | Low | Poor |
| Walters Big Horn County | 26 | 1978 | Low | Poor |
| Walters Johnson County | 35 | 1952 | Low | Fair |
| Wamsutter Wastewater Sweetwater County | 8 | 1979 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.