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 401–425 of 752
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Kafka No. 1 Albany County | 22 | 1969 | Low | Fair |
| July Campbell County | 26 | 2005 | Low | Fair |
| J. Smith Washakie County | 14 | 1943 | Low | Fair |
| Jordan No. 9 Campbell County | 29 | 2005 | Low | Fair |
| Jordan No. 1 Laramie County | 36 | 1955 | Low | Fair |
| J.O. Mcdonald Wetland Pond #2 Crook County | 10 | 2002 | Low | Fair |
| John Stock Johnson County | 25 | 1970 | Low | Fair |
| Johnson No. 1 Natrona County | 20 | 1914 | Low | Fair |
| Johnson 41-23-4377 Johnson County | 29 | 2005 | Low | Fair |
| John Arambel Sublette County | 22 | — | Low | Fair |
| Joe Creek Sheridan County | 30 | 1963 | Low | Fair |
| Joe Johnson County | 27 | 1957 | Low | Fair |
| J-J No. 3 Sublette County | 9 | 1927 | Low | Fair |
| Jim Bridger Power Plant Surge Pond Sweetwater County | 97 | 1989 | Significant | Fair |
| Jim Bridger Fgd Spent Liquor Pond No. 2 Sweetwater County | 46 | 1990 | Significant | Fair |
| Jim Campbell County | 27 | 2006 | Low | Fair |
| Jessie Crook County | 26 | 1963 | Low | Fair |
| Jepson No. 2 Johnson County | 22 | 1953 | Low | Fair |
| Jenson Fremont County | 44 | 1979 | Low | Fair |
| James Thompson No. 1 Stock Niobrara County | 30 | 1960 | Low | Fair |
| Jackson Wastewater Treatment Plant Teton County | 16 | 1980 | Low | Fair |
| Iron Mountain No. 1 Albany County | 32 | 1957 | Low | Fair |
| Iron Mountain Albany County | 35 | 1910 | Low | Fair |
| Irene Johnson County | 30 | 1963 | Low | Fair |
| Irene Carbon County | 35 | 1953 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.