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 726–750 of 752
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Arnold Goshen County | 33 | 1968 | Low | Fair |
| Arch Johnson County | 30 | 1949 | Low | Fair |
| A & P No. 1 Converse County | 27 | 1954 | Low | Fair |
| Antelope Dam Natrona County | 25 | 1956 | Low | Fair |
| Antelope Carbon County | 16 | 1940 | Low | Fair |
| Antelope Carbon County | 18 | 1945 | Low | Fair |
| Annis Natrona County | 25 | 1948 | Low | Fair |
| Anne Marie #1 Carbon County | 28 | 1996 | Low | Fair |
| Anita Johnson County | 38 | 1965 | Low | Fair |
| Anaheim Johnson County | 33 | 2005 | Low | Fair |
| Amos Campbell County | 11 | 1914 | Low | Fair |
| Amerada Stock Johnson County | 25 | 1969 | Low | Fair |
| A & M Sweetwater County | 31 | 1978 | Low | Fair |
| A. L. Lind No. 1 Niobrara County | 18 | 1940 | Low | Fair |
| Alkali Dam Natrona County | 35 | 1967 | Low | Fair |
| Al Capone Campbell County | 34 | 2007 | Low | Fair |
| A-3 Detention Goshen County | 30 | 1969 | Low | Fair |
| 900k Pond | 40 | 2024 | Low | Fair |
| (7) Ranch 21-1-5674 Campbell County | 28 | 1945 | Low | Fair |
| 66 Pastures Goshen County | 16 | 1910 | Low | Fair |
| 4 X Sheridan County | 28 | 1969 | Low | Fair |
| 43-3-5375 Campbell County | 32 | 1981 | Low | Fair |
| 32-3182 Sheridan County | 33 | 2003 | Low | Fair |
| 22 - 36 Johnson County | 95 | 2003 | Low | Fair |
| 13-19-56-82 Sheridan County | 33 | 2007 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.