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 726–750 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Marton Johnson County | 31 | 1963 | Low | Poor |
| Mary No. 1 Carbon County | 38 | 1948 | Low | Poor |
| Mary No. 2 Johnson County | 22 | 1973 | Low | Fair |
| Mary Stead Natrona County | 14 | 1909 | Low | Fair |
| Mary Stock Johnson County | 38 | 1970 | Low | Poor |
| Mary Stock Campbell County | 29 | 1964 | Low | Fair |
| Massae Uinta County | 24 | 1968 | Low | Fair |
| Maxwell Sheridan County | 30 | 1901 | Low | Poor |
| Mbpp Ash Pond Platte County | 25 | 1984 | Low | Satisfactory |
| Mbpp Emergency Holding Pond Platte County | 20 | 1980 | Low | Satisfactory |
| Mbpp Raw Water Source Platte County | 30 | 1978 | Low | Fair |
| Mbpp Storm Runoff Retention Platte County | 40 | 1976 | Low | Fair |
| Mcconnell No. 1 Campbell County | 34 | 1954 | Low | Poor |
| Mcginnis Evaporation Sublette County | 24 | 1984 | Low | Fair |
| Mcintosh No. 1 Fremont County | 80 | 1979 | Low | Fair |
| Mcintosh No.2 Enlargement Fremont County | 41 | — | Low | Fair |
| Mclaughlin No. 2 Laramie County | 30 | 1934 | Low | Not Rated |
| Mcleod Campbell County | 22 | 1957 | Low | Fair |
| Mcmaster Niobrara County | 18 | 1951 | Low | Fair |
| Mcmaster No. 4 Niobrara County | 14 | 1966 | Low | Fair |
| Mcmillen No. 2 Goshen County | 19 | 1955 | Low | Poor |
| Mcmillen No. 3 Goshen County | 14 | 1957 | Low | Fair |
| Mcninch No. 1 Sublette County | 33 | 1947 | Low | Poor |
| Mcninch No. 2 Sublette County | 27 | 1957 | Low | Poor |
| Mcpherson Natrona County | 20 | 1923 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.