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 1101–1125 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Ek Addition No. 1 Dam Natrona County | 29 | 1966 | Low | Poor |
| Eisele-Rice Sheridan County | 25 | 1968 | Low | Fair |
| E. E. Wakeman Crook County | 17 | 1962 | Low | Fair |
| Edgerton Stock Campbell County | 23 | 1953 | Low | Fair |
| Eden Dike 1 Sweetwater County | 28 | 1906 | Low | Not Available |
| Eberhard No. 1 Big Horn County | 37 | — | Low | Poor |
| East Side No. 3 Converse County | 25 | 1966 | Significant | Poor |
| East Side No. 2 Converse County | 29 | 1966 | Low | Poor |
| East No. 1 Beardsley Niobrara County | 35 | 1959 | Low | Poor |
| East Iron Creek Dam Weston County | 24 | 1996 | Low | Not Rated |
| Eastgate Natrona County | 60 | 2010 | High | Poor |
| East Fork Wolf Creek Natrona County | 42 | 1974 | Significant | Fair |
| Eastdale Creek Detention No.2 Natrona County | 19 | 2008 | High | Fair |
| Eastdale Creek Detention No.1 Natrona County | 24 | 2008 | Low | Fair |
| East Cellers 9-499-4 Weston County | 28 | 1949 | Low | Not Rated |
| Eagle Canyon Natrona County | 23 | 1924 | Low | Poor |
| Dwight Johnson County | 34 | 1953 | Low | Fair |
| Dutton Creek Albany County | 31 | 1911 | Low | Fair |
| Durham 44-16-4472 Campbell County | 21 | 1982 | Low | Fair |
| Durham Campbell County | 22 | 1973 | Low | Poor |
| Dunn No. 1 Converse County | 27 | 1954 | Low | Poor |
| Dunning Sese S 32 #2 Sheridan County | 27 | 2013 | Low | Fair |
| Dunning Senw S 32 Sheridan County | 29 | 2013 | Low | Fair |
| Duncan Sheridan County | 33 | 1939 | Low | Poor |
| Dump Draw Johnson County | 42 | 2019 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.