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 326–350 of 543
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Middle Piney Lake Dam Sublette County | 24 | 1940 | High | Poor |
| Miller Johnson County | 50 | 1955 | Low | Poor |
| Miller No. 1 Platte County | 34 | 1949 | Low | Poor |
| Miller No. 2 Platte County | 29 | 1951 | Low | Poor |
| Mock Bass Sheridan County | 40 | 1966 | Low | Poor |
| Moon Hot Springs County | 24 | 1957 | Low | Poor |
| Morrison Fish Platte County | 26 | 1973 | Low | Poor |
| Morrison No. 2 Platte County | 32 | 1975 | Low | Poor |
| Morton No. F.S. 9-231-39 Converse County | 22 | 1972 | Low | Poor |
| Moslander Uinta County | 45 | 1948 | Low | Poor |
| Mowry Johnson County | 30 | 1963 | Low | Poor |
| Muddy Guard No. 1 Johnson County | 50 | 1976 | Low | Poor |
| Mule Creek No. 1 Niobrara County | 30 | 1962 | Low | Poor |
| Mullen Campbell County | 22 | 1970 | Low | Poor |
| Municipal Golf Course Sheridan County | 32 | 1980 | Low | Poor |
| Murphy Johnson County | 25 | 1970 | Low | Poor |
| M. W. Reservoir Weston County | 35 | 1912 | Low | Poor |
| Myers Uinta County | 43 | 1954 | Significant | Poor |
| Natural Bridge Fremont County | 21 | — | Low | Poor |
| New Deal No. 1 Niobrara County | 46 | 1972 | Low | Poor |
| Newell Albany County | 31 | 1969 | Low | Poor |
| Newland No. 4 Crook County | 22 | 1955 | Low | Poor |
| Nichols No. 2 Converse County | 25 | 1962 | Low | Poor |
| Nielson Fremont County | 15 | 1934 | Low | Poor |
| Nimmo No. 8 Laramie County | 26 | 1942 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.