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 1301–1325 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Texas Gulf Tailings (Phase 1e & 1f Enl.) Sweetwater County | 30 | 1976 | Significant | Fair |
| Thayer No. 1 Park County | 13 | 1935 | Low | Fair |
| The Wall Campbell County | 38 | 2009 | Low | Fair |
| Thoman Lincoln County | 25 | 1945 | Low | Poor |
| Thomas Park County | 56 | 1949 | Low | Poor |
| Thomas No. 1 Weston County | 22 | 1914 | Low | Poor |
| Thomas No. 2 Laramie County | 13 | 1956 | Low | Poor |
| Thomas No. 2 Weston County | 23 | 1948 | Low | Poor |
| Thompson Niobrara County | 37 | 1950 | Low | Fair |
| Thompson Carbon County | 23 | 1923 | Low | Poor |
| Three Forks Weston County | 31 | 1965 | Low | Fair |
| Three Forks Dam Natrona County | 36 | 1954 | Low | Unsatisfactory |
| Three Mile Albany County | 18 | 1904 | Low | Fair |
| Three T No 1 Dam Natrona County | 23 | 1960 | Low | Poor |
| Thunder Basin No 10 Campbell County | 23 | 1938 | Low | Not Rated |
| Thunder Basin No 9 Weston County | 21 | 1937 | Low | Not Rated |
| Thunder Basin No. 95 Campbell County | 28 | 1937 | Low | Not Rated |
| Tibbs Campbell County | 30 | 1968 | Low | Poor |
| Tie Hack Johnson County | 110 | 1997 | High | Fair |
| Tillard 38-72-31 Off Channel Reservoir #4 Converse County | 30 | 2023 | Low | Satisfactory |
| Tim White Wetlands Carbon County | 11 | 1994 | Low | Poor |
| Tipperary Uinta County | 24 | 1928 | Low | Poor |
| Tisdale No. 3 Campbell County | 30 | 1990 | Low | Fair |
| T. L. Crook County | 27 | 1970 | Low | Poor |
| Toltec Albany County | 60 | 1984 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.