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 826–850 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Jackson Lake Dam Teton County | 84 | 1911 | High | Not Available |
| Jack Pot Natrona County | 45 | 1915 | Low | Poor |
| Jack Dam Natrona County | 35 | 1971 | Low | Unsatisfactory |
| Jack Creek Carbon County | 24 | 1919 | Low | Poor |
| Isom Uinta County | 20 | 1976 | Low | Not Rated |
| Iron Mountain No. 1 Albany County | 32 | 1957 | Low | Fair |
| Iron Mountain Albany County | 35 | 1910 | Low | Fair |
| Irene No. 2 Carbon County | 30 | 1953 | Low | Poor |
| Irene Carbon County | 35 | 1953 | Low | Fair |
| Irene Johnson County | 30 | 1963 | Low | Fair |
| Intercity Wastewater Treatment(Cell 3) Sweetwater County | 10 | 1990 | Low | Fair |
| Intercity Wastewater Treatment(Cell 2) Sweetwater County | 10 | 1990 | Low | Fair |
| Intercity Wastewater Treatment(Cell 1) Sweetwater County | 10 | 1990 | Low | Fair |
| Innes Campbell County | 33 | 1956 | Low | Fair |
| Indian Lake Teton County | 13 | 1954 | Low | Poor |
| Indian Creek No. 1 Converse County | 41 | 1953 | Low | Fair |
| Indian Creek Carbon County | 28 | 1953 | Low | Poor |
| Ikey Big Horn County | 29 | 1965 | Low | Fair |
| Iberlin 43-3-4676 Campbell County | 39 | 2009 | Low | Fair |
| Iberlin Johnson County | 30 | 1951 | Low | Poor |
| Hutton 4-24-5684 Sheridan County | 18 | 2010 | Low | Poor |
| Huson Johnson County | 30 | 1968 | Low | Poor |
| Huntington Sheridan County | 22 | 1906 | Low | Poor |
| Hundred Springs Albany County | 14 | 1915 | Low | Poor |
| Hugh Mcdonald Platte County | 37 | 1949 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.