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 901–925 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ewen Big Horn County | 40 | 1946 | Low | Poor |
| Ethyl No. 2 Johnson County | 25 | 1969 | Low | Fair |
| Ethel #3 Sheridan County | 28 | 2008 | Low | Poor |
| Eshom Platte County | 28 | 1947 | Low | Poor |
| Erramouspe Sublette County | 15 | 1957 | Low | Fair |
| Enl. Windy Point Washakie County | 30 | — | Low | Poor |
| Enl. Willow Creek No. 2 Albany County | 42 | 1981 | Low | Fair |
| Enl. West Pearson Stock Campbell County | 39 | 1958 | Low | Fair |
| Enl, T55nr75w17swnw Campbell County | 21 | 2008 | Low | Poor |
| Enl. Sutherland Laramie County | 47 | 1990 | Low | Fair |
| Enl. Spring Sheridan County | 39 | 2005 | Low | Fair |
| Enl. Rocky Road Johnson County | 34 | 2007 | Low | Fair |
| Enl. Perry Sheridan County | 36 | 2007 | Low | Fair |
| Enl. P3-2 Campbell County | 50 | 2008 | Low | Poor |
| Enl. No. 4 Sweetwater County | 37 | 1973 | Low | Fair |
| Enl. Little Soda Weston County | 16 | 1909 | Low | Poor |
| Enl. Johnson 42-27-4377 Johnson County | 24 | — | Low | Fair |
| Enl. Johnson 34-4-4377 Johnson County | 35 | 2006 | Low | Fair |
| Enl. Iberlin 23-4-4676 Campbell County | 36 | 2006 | Low | Fair |
| Enl. Halleck Creek No. 3 Albany County | 29 | 1975 | Low | Poor |
| Enl. Gerry Nicolaysen No. 1 Converse County | 35 | 1966 | Low | Poor |
| Enl. George H. Marshall Johnson County | 46 | 2007 | Low | Fair |
| Enl. Fresno Johnson County | 39 | 2007 | Low | Fair |
| Enl. Ellie Campbell County | 31 | 2007 | Low | Fair |
| Enl. Eddie Sheridan County | 33 | 1953 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.