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 301–325 of 752
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Neil Johnson County | 49 | 2008 | Low | Fair |
| Myrtle Campbell County | 29 | 1963 | Low | Fair |
| Murk Stock Johnson County | 32 | 1962 | Low | Fair |
| Mule Creek Albany County | 30 | 1911 | Low | Fair |
| Muffie Johnson County | 40 | 1970 | Low | Fair |
| Muddy Guard No. 2 South Dam Johnson County | 57 | 1976 | High | Fair |
| Muddy Guard No. 2 North Dam Johnson County | 102 | 1976 | Significant | Fair |
| Mosier No. 1 Niobrara County | 26 | 1974 | Low | Fair |
| Mooney 10-5 Campbell County | 41 | 2005 | Low | Fair |
| M.O. No. 1 Converse County | 27 | 1985 | Low | Fair |
| Monkey Cowboy Johnson County | 36 | 2007 | Low | Fair |
| Moncreiffe Sheridan County | 23 | 1954 | Low | Fair |
| Mole Man Johnson County | 39 | 2008 | Low | Fair |
| Mitch No. 2 Stock Campbell County | 30 | 1957 | Low | Fair |
| Mitch Campbell County | 26 | 1953 | Low | Fair |
| Mill Iron Cross Campbell County | 25 | 1962 | Low | Fair |
| Miller #1 - Second Enlargement Big Horn County | 39 | 1972 | Low | Fair |
| Miller Platte County | 25 | 1967 | Low | Fair |
| Michelena #3 Johnson County | 39 | 2006 | Low | Fair |
| Meredith Sheridan County | 29 | 1912 | Low | Fair |
| Menardi & White Sheridan County | 37 | 1951 | Low | Fair |
| Meadow Pasture Campbell County | 32 | 2007 | Low | Fair |
| Mcpherson Natrona County | 20 | 1923 | Low | Fair |
| Mcmillen No. 3 Goshen County | 14 | 1957 | Low | Fair |
| Mcmaster No. 4 Niobrara County | 14 | 1966 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.