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 851–875 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| 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 |
| Mcmurry No. 4 Natrona County | 78 | 2014 | High | Satisfactory |
| 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 |
| Meadow Creek Natrona County | 35 | 1952 | Low | Poor |
| Meadowlark Washakie County | 33 | 1938 | High | Not Rated |
| Meadow Pasture Campbell County | 32 | 2007 | Low | Fair |
| Meeks Cabin Dam Uinta County | 185 | 1971 | High | Not Available |
| Meer Carbon County | 22 | 1953 | Low | Poor |
| Menardi & White Sheridan County | 37 | 1951 | Low | Fair |
| Meredith Sheridan County | 29 | 1912 | Low | Fair |
| Mertz No. 2 Platte County | 19 | 1905 | Low | Poor |
| Michelena #3 Johnson County | 39 | 2006 | Low | Fair |
| Middle Cottonwood Dam Fremont County | 27 | 1974 | Low | Not Available |
| Middle Piney Lake Dam Sublette County | 24 | 1940 | High | Poor |
| Miller Johnson County | 50 | 1955 | Low | Poor |
| Miller Platte County | 25 | 1967 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.