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 126–150 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Upper North Tisdale No. 1 Campbell County | 17 | 1999 | Low | Fair |
| Upper Hackett Dam Natrona County | 32 | 1967 | Low | Unsatisfactory |
| Upper Goose Pond Fremont County | 13 | — | Significant | Not Rated |
| Upper Delta (North Offset Dam & West Offset Dam) Sweetwater County | 40 | 2013 | High | Fair |
| Upper Cottonwood Dam Fremont County | 14 | 1972 | Low | Not Available |
| Upper Afton Lincoln County | 25 | 1942 | Low | Satisfactory |
| Upper Washakie County | 15 | 1922 | Low | Poor |
| Units 1 and 2 Ash and Clear Water Lincoln County | 88 | 1994 | Low | Fair |
| Unit 3 Fgd Pond 2 Carbon County | 25 | 1998 | Significant | Fair |
| Unit 3 Fgd Evaporation Pond 1 Lincoln County | 40 | 1990 | Low | Fair |
| Unit 3 Ash and Clear Water Lincoln County | 61 | 1994 | Low | Fair |
| Ulman No. 1 Laramie County | 22 | 1970 | Low | Fair |
| Uhl Teton County | 20 | 1948 | Low | Fair |
| Two Wash Detention Washakie County | 37 | 2003 | Low | Poor |
| Two Bar No. 1 Albany County | 36 | 1974 | Low | Fair |
| Twin No. 1 Johnson County | 47 | 1957 | Low | Poor |
| Twin Lakes No. 1 Sheridan County | 91 | 1998 | High | Not Rated |
| Twin Forks Weston County | 42 | 1959 | Low | Poor |
| Twin Buttes Albany County | 8 | 1972 | Low | Fair |
| Twiford Platte County | 35 | 1944 | Low | Poor |
| Turner & Swank Sheridan County | 30 | 1911 | Low | Fair |
| Turner Reservoir Weston County | 32 | 1993 | Significant | Not Rated |
| Turner No. 1 Niobrara County | 19 | 1969 | Low | Poor |
| Turkey Springs Natrona County | 29 | 1914 | Low | Fair |
| T & T Enlargement of Driskill Crook County | 31 | 1954 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.