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 226–250 of 543
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mcconnell No. 1 Campbell County | 34 | 1954 | Low | Poor |
| Maxwell Sheridan County | 30 | 1901 | Low | Poor |
| Mary Stock Johnson County | 38 | 1970 | Low | Poor |
| Mary No. 1 Carbon County | 38 | 1948 | Low | Poor |
| Marton Johnson County | 31 | 1963 | Low | Poor |
| Martin Uinta County | 27 | 1958 | Low | Poor |
| Marsh and Company No. 7 Carbon County | 25 | 1917 | Low | Poor |
| Manke Niobrara County | 27 | 1950 | Low | Poor |
| Madonna Johnson County | 35 | 1973 | Low | Poor |
| Lyle Johnson County | 37 | 1953 | Low | Poor |
| Luce Park County | 19 | 1912 | Low | Poor |
| Lox Natrona County | 35 | 1966 | Low | Poor |
| Lower Spicer Natrona County | 17 | 1951 | Significant | Poor |
| Lowe No. 1 Sheridan County | 25 | 1954 | Low | Poor |
| Louis Crook County | 26 | 1959 | Low | Poor |
| Loren Ramsey Fish Platte County | 29 | 1972 | Low | Poor |
| Longeley Niobrara County | 22 | 1972 | Low | Poor |
| Lone Tree Crook County | 17 | 1955 | Low | Poor |
| Lone Tree Albany County | 35 | 1947 | Low | Poor |
| Little Willow Goshen County | 10 | 1906 | Low | Poor |
| Little Robber Det. Dam X Carbon County | 48 | 1953 | High | Poor |
| Little Red No. 2 Sheridan County | 36 | 1966 | Low | Poor |
| Little Red Sheridan County | 32 | 1956 | Low | Poor |
| Little Pierce Albany County | 24 | 1941 | Low | Poor |
| Little Joe Detention Washakie County | 25 | 2003 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.