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 426–450 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Frog Creek #1 Weston County | 16 | 1955 | Low | Poor |
| Frost No. 2 Park County | 14 | 1956 | Low | Poor |
| Full Moon Campbell County | 22 | 1945 | Low | Fair |
| Gafford Converse County | 35 | 1951 | Low | Poor |
| Gammon Johnson County | 34 | 1974 | Low | Poor |
| Gantz Dam Natrona County | 34 | 1964 | Low | Not Rated |
| Gardner Laramie County | 20 | 1962 | Low | Poor |
| Garrelts No. 1 Goshen County | 17 | 1975 | Low | Poor |
| Gary Campbell County | 34 | 1952 | Low | Poor |
| Gates Campbell County | 25 | 1963 | Low | Poor |
| Geier Irrigation Reservoir Weston County | 42 | 2008 | Low | Fair |
| Geiger Niobrara County | 32 | 1952 | Low | Poor |
| Gene No. 2 Stock Converse County | 25 | 1984 | Low | Fair |
| G. H. Reservoir Carbon County | 17 | 1977 | Low | Poor |
| Gibbons No. 1 Campbell County | 29 | 1962 | Low | Fair |
| Gillespie Albany County | 8 | 1914 | Low | Poor |
| Gillette Campbell County | 10 | 1908 | Low | Fair |
| Gillette Fishing Lake Campbell County | 15 | 1962 | Low | Poor |
| Gill No. 5 Stock Sheridan County | 30 | — | Low | Poor |
| G-K Natrona County | 23 | 1963 | Low | Fair |
| Gleason Reservoir No. 2 Laramie County | 21 | 1909 | Low | Poor |
| Glen Means Johnson County | 34 | 1992 | Low | Fair |
| Goble No. 2 Johnson County | 25 | 1972 | Low | Poor |
| Golden Clover No. 1 Carbon County | 27 | 1960 | Low | Poor |
| Golden Eagle Campbell County | 33 | 2000 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.