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 776–800 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Leach No. 1 Stock Niobrara County | 30 | 1961 | Low | Poor |
| Leavitt Big Horn County | 45 | 1956 | High | Poor |
| Leck Mayes Big Horn County | 8 | 1992 | Low | Poor |
| Lee Mankin Campbell County | 29 | 1956 | Low | Fair |
| Leidy Lake Teton County | 8 | 1983 | Low | Fair |
| Leonard Degering Niobrara County | 21 | 1979 | Low | Poor |
| Leslie No. 2 Johnson County | 24 | 1991 | Low | Fair |
| Lewis Big Horn County | 19 | 1948 | Low | Poor |
| Lewis Laramie County | 26 | 1908 | Low | Fair |
| Lion Johnson County | 31 | 1964 | Low | Poor |
| Little Boxelder No. 1 Converse County | 54 | 1971 | Significant | Poor |
| Little Boxelder No. 3 Converse County | 30 | 1955 | Low | Poor |
| Little Joe Detention Washakie County | 25 | 2003 | Low | Poor |
| Little Pierce Albany County | 24 | 1941 | Low | Poor |
| Little Red Sheridan County | 32 | 1956 | Low | Poor |
| Little Red No. 2 Sheridan County | 36 | 1966 | Low | Poor |
| Little Robber Det. Dam X Carbon County | 48 | 1953 | High | Poor |
| Little Sage Creek Reservoir Carbon County | 26 | 1969 | High | Satisfactory |
| Little Willow Goshen County | 10 | 1906 | Low | Poor |
| Loco Creek Carbon County | 48 | 2004 | Low | Fair |
| Logan Jct. Detention Dam Fremont County | 23 | 1952 | Low | Unsatisfactory |
| Lone Tree Crook County | 17 | 1955 | Low | Poor |
| Lone Tree Albany County | 35 | 1947 | Low | Poor |
| Lone Tree No. 2 Albany County | 7 | 1909 | Low | Fair |
| Longeley Niobrara County | 22 | 1972 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.