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 276–300 of 543
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Kelly Johnson County | 26 | 1973 | Significant | Poor |
| Kaufman No. 1 Goshen County | 29 | 1975 | Low | Poor |
| Kaufmann Johnson County | 49 | 1954 | Low | Poor |
| Karl Johnson County | 33 | 1958 | Low | Poor |
| Kane Cemetery Big Horn County | 16 | 1988 | Low | Poor |
| Joss Niobrara County | 24 | 1918 | Low | Poor |
| Jordan Niobrara County | 26 | 1952 | Low | Poor |
| Johnson No. 1 Niobrara County | 30 | 1916 | Low | Poor |
| Johnson #3 Niobrara County | 22 | 1944 | Low | Poor |
| Johnson Fremont County | 32 | 1959 | Low | Poor |
| Johnson Albany County | 35 | 1962 | Low | Poor |
| John L. Campbell No. 1 Carbon County | 18 | 1912 | Low | Poor |
| John Beaton Natrona County | 37 | 1941 | Low | Poor |
| Joe Draw Jr. Sheridan County | 30 | 2004 | Low | Poor |
| J. O. Carbon County | 30 | 1946 | Low | Poor |
| J. N. Mertz Platte County | 13 | 1903 | Low | Poor |
| J & J Natrona County | 25 | 1942 | Low | Poor |
| Jiggs Campbell County | 25 | 1957 | Low | Poor |
| J & H Ranch No. 1 Sheridan County | 30 | 1959 | Low | Poor |
| Jerry Johns Reservoir No. 1 Sheridan County | 25 | 1977 | Low | Poor |
| James Lake Albany County | 40 | 1908 | Low | Poor |
| Jack Pot Natrona County | 45 | 1915 | Low | Poor |
| Jack Creek Carbon County | 24 | 1919 | Low | Poor |
| Irene No. 2 Carbon County | 30 | 1953 | Low | Poor |
| Indian Lake Teton County | 13 | 1954 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.