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 326–350 of 543
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hill Campbell County | 16 | 1944 | Low | Poor |
| Higgins No. 2 Converse County | 20 | 1908 | Low | Poor |
| Higgins No. 1 Converse County | 26 | 1911 | Low | Poor |
| Hickey Uinta County | 27 | 1980 | Low | Poor |
| Hewes No. 1 Crook County | 15 | 1986 | Low | Poor |
| Hepp Johnson County | 22 | 1964 | Low | Poor |
| Henry No. 1 Stock Johnson County | 28 | 1967 | Low | Poor |
| Henry Johnson County | 30 | 1960 | Low | Poor |
| Henderson Drain Detention Laramie County | 10 | 1987 | Low | Poor |
| Hay Sweetwater County | 18 | 1907 | Low | Poor |
| Hawk Springs Goshen County | 64 | 1925 | High | Poor |
| Havens Crook County | 16 | 1906 | Low | Poor |
| Hatchet Washakie County | 25 | — | Low | Poor |
| Hart Enlargement of Tippacanoe No. 1 Park County | 12 | 1908 | Low | Poor |
| Harris No.2 Campbell County | 28 | 2006 | Low | Poor |
| Harrington Big Horn County | 30 | 1974 | Significant | Poor |
| Hape Sheridan County | 35 | 1970 | Low | Poor |
| Hansen Carbon County | 16 | 1922 | Low | Poor |
| Hanchett Albany County | 29 | 1990 | Low | Poor |
| Hal No. 2 Platte County | 35 | 1968 | Low | Poor |
| Haines Carbon County | 20 | 1912 | Low | Poor |
| Hagerman Crook County | 20 | 1942 | Low | Poor |
| Gunst Carbon County | 24 | 1926 | Significant | Poor |
| Griswold No. 1 Niobrara County | 25 | 1954 | Low | Poor |
| Greyhound Carbon County | 11 | 1910 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.