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 26–45 of 45
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Nighthawk Facility - Phase 2 (Pit3) & Phase 3 (Pit 4) Converse County | 29 | 2020 | Low | Satisfactory |
| Raw Water Reservoir Sweetwater County | 42 | 2022 | Significant | Satisfactory |
| Ray Lake Fremont County | 30 | 1925 | High | Satisfactory |
| R&D Brine Pond Sweetwater County | 21 | 2022 | Significant | Satisfactory |
| Smith Ranch - Highland Satellite No. 2 Dam Converse County | 18 | 1979 | Low | Satisfactory |
| Snyder Park County | 35 | 2000 | Low | Satisfactory |
| Squirrel Tail Dam Hot Springs County | 29 | 2003 | Low | Satisfactory |
| Tillard 38-72-31 Off Channel Reservoir #4 Converse County | 30 | 2023 | Low | Satisfactory |
| Upper Afton Lincoln County | 25 | 1942 | Low | Satisfactory |
| Vollman 3572-7 Produced Water #2 Converse County | 25 | 2024 | Low | Satisfactory |
| Vollman 3673-33 Produced Water #1 Converse County | 20 | — | Low | Satisfactory |
| Washakie Fremont County | 93 | 1935 | High | Satisfactory |
| Washakie Dike No. 1 Fremont County | 42 | 1935 | Undetermined | Satisfactory |
| Washakie Dike No. 2 Fremont County | 34 | 1935 | Undetermined | Satisfactory |
| Washakie Dike No. 3 Fremont County | 52 | 1935 | Undetermined | Satisfactory |
| Wheaton No. 1 Converse County | 26 | 1969 | Low | Satisfactory |
| Xbe 4271-14 Mixed Use #3 Campbell County | 17 | 2023 | Low | Satisfactory |
| Xbe 4271-14 Mixed Use #4 Campbell County | 17 | 2023 | Low | Satisfactory |
| Xbe 4271-14 Mixed Use #5 Campbell County | 17 | — | Low | Satisfactory |
| Xbe 4271-14 Mixed Use #6 Campbell County | 18 | — | Low | Satisfactory |
PreviousPage 2 of 2
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.