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 176–200 of 543
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Paterson Lake Uinta County | 14 | 1907 | Significant | Poor |
| Patch Johnson County | 44 | 1958 | Low | Poor |
| Pat Johnson County | 36 | 1958 | Low | Poor |
| Pass Johnson County | 36 | 1959 | Low | Poor |
| Paddy No. 2 Niobrara County | 30 | 1963 | Low | Poor |
| Paddy No. 1 Niobrara County | 29 | 1963 | Low | Poor |
| Pacific No. 2 Fremont County | 18 | 1922 | Low | Poor |
| P16-5 Reservoir Campbell County | 49 | 2006 | Low | Poor |
| O S W Fremont County | 28 | 1912 | High | Poor |
| One Mile Laramie County | 35 | 1907 | Significant | Poor |
| Ollie Stock Sheridan County | 25 | 1963 | Low | Poor |
| Okie Fremont County | 26 | 1898 | Significant | Poor |
| Ocean Lake Habitat No. 6 Fremont County | 9 | 1973 | Low | Poor |
| Ocean Lake Habitat No. 5 Fremont County | 9 | 1973 | Low | Poor |
| North Trail Campbell County | 25 | 1941 | Low | Poor |
| North Spring Creek Carbon County | 31 | 1958 | High | Poor |
| North Logan Det. Dam Fremont County | 25 | 1952 | Low | Poor |
| North Laramie Land Company No. 1 Platte County | 30 | 1912 | Low | Poor |
| Nimmo No. 8 Laramie County | 26 | 1942 | Low | Poor |
| Nielson Fremont County | 15 | 1934 | Low | Poor |
| Nichols No. 2 Converse County | 25 | 1962 | Low | Poor |
| Newland No. 4 Crook County | 22 | 1955 | Low | Poor |
| Newell Albany County | 31 | 1969 | Low | Poor |
| New Deal No. 1 Niobrara County | 46 | 1972 | Low | Poor |
| Natural Bridge Fremont County | 21 | — | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.