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 1451–1475 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Williams No. 3 Albany County | 28 | 1969 | Low | Fair |
| Willits Johnson County | 22 | 1940 | Low | Fair |
| Will No. 1 Johnson County | 30 | 1991 | Low | Fair |
| Willow Glenn Johnson County | 30 | 1959 | Low | Fair |
| Willow Lake Sublette County | 20 | 1955 | Significant | Poor |
| Willow Park Johnson County | 60 | 1959 | High | Not Rated |
| Willwood Diversion Dam Park County | 70 | 1924 | Low | Not Available |
| Wilson No. 1 Converse County | 25 | 1977 | Low | Fair |
| Windmill No. 1 Campbell County | 38 | 2008 | Low | Fair |
| Windmill No. 1 Niobrara County | 50 | 1956 | Low | Poor |
| Wind River Diversion Dam Fremont County | 41 | 1923 | Low | Not Available |
| Windy Draw Sheridan County | 59 | 1965 | High | Fair |
| Wintermote No. 1 Converse County | 21 | 1969 | Low | Poor |
| Wire Corral Washakie County | 26 | 1966 | Low | Fair |
| Wjs Campbell County | 23 | 2002 | Low | Fair |
| Wolff Campbell County | 31 | 2004 | Low | Fair |
| Woodruff Narrows Uinta County | 68 | 1962 | High | Fair |
| Worland Wastewater Treatment (Cell 1) Washakie County | 15 | 1992 | Low | Fair |
| Worland Wastewater Treatment (Cell 2) Washakie County | 15 | 1992 | Low | Fair |
| Worland Wastewater Treatment (Cell 3) Washakie County | 15 | 1992 | Low | Fair |
| Worland Wastewater Treatment (Cell 4) Washakie County | 15 | 1992 | Low | Fair |
| Wortham Washakie County | 20 | 1915 | Low | Fair |
| W.R. Hamilton No. 2 Converse County | 20 | 1917 | Low | Poor |
| Wyoming Campbell County | 23 | 2006 | Low | Fair |
| Wyoming Development Company No. 1 Platte County | 49 | 1960 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.