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 601–625 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lewis Laramie County | 26 | 1908 | Low | Fair |
| Lewis Big Horn County | 19 | 1948 | Low | Poor |
| Leslie No. 2 Johnson County | 24 | 1991 | Low | Fair |
| Leonard Degering Niobrara County | 21 | 1979 | Low | Poor |
| Leidy Lake Teton County | 8 | 1983 | Low | Fair |
| Lee Mankin Campbell County | 29 | 1956 | Low | Fair |
| Leck Mayes Big Horn County | 8 | 1992 | Low | Poor |
| Leach No. 1 Stock Niobrara County | 30 | 1961 | Low | Poor |
| Lazy Y No. 1 Converse County | 45 | 1957 | Low | Poor |
| Larry's Last Chance Big Horn County | 25 | 1965 | Low | Poor |
| Laramore Campbell County | 23 | 2009 | Low | Fair |
| Laramie Wastewater Treatment(Cell 1) Albany County | 19 | 1983 | Low | Fair |
| Lander Wastewater Treatment Fremont County | 13 | 1994 | Low | Fair |
| Lander Wastewater Treatment Fremont County | 14 | 1994 | Low | Fair |
| Lander Wastewater Treatment Fremont County | 10 | 1994 | Low | Fair |
| Lander Wastewater Treatment Fremont County | 14 | 1994 | Low | Fair |
| Lance Creek No. 2 Niobrara County | 20 | 1966 | Low | Poor |
| Lance Creek No. 1 Niobrara County | 26 | 1965 | Low | Poor |
| Lampman Big Horn County | 25 | — | Low | Fair |
| Lamb Upper Converse County | 28 | 1953 | Low | Fair |
| Lamb Lower Natrona County | 28 | 1952 | Low | Poor |
| Lake Mckinney Big Horn County | 26 | 1939 | Low | Fair |
| Lake George Carbon County | 19 | 1971 | Low | Fair |
| Lake Creek Hot Springs County | 45 | 1938 | Low | Fair |
| Lake Cameahwait Dam Fremont County | 13 | 1973 | Low | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.