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 951–975 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Griswold No. 1 Niobrara County | 25 | 1954 | Low | Poor |
| Grinnell Carbon County | 8 | 1919 | Low | Fair |
| Griffith Stock Sheridan County | 32 | 1964 | Low | Fair |
| Griffith Sheridan County | 25 | 1952 | Low | Fair |
| Greyhound Carbon County | 11 | 1910 | Low | Poor |
| Greybull Valley (1st Enl.) Park County | 207 | 2000 | High | Fair |
| Greybull Sewage Treatment Lagoon Big Horn County | 8 | 1960 | Significant | Fair |
| Green Hills Washakie County | 17 | 1971 | Low | Fair |
| Green Cabin No. 3 Sheridan County | 31 | 1969 | Low | Fair |
| Green Cabin Sheridan County | 33 | 1969 | Low | Fair |
| Grazing No. 1 Stock Albany County | 30 | 1976 | Low | Fair |
| Grayrocks Platte County | 95 | 1980 | High | Fair |
| Gray Reef Dam Natrona County | 38 | 1961 | Low | Not Available |
| Grassy Lake Dam Teton County | 118 | 1939 | High | Not Available |
| Grant No. 2 Platte County | 20 | 1911 | Low | Not Rated |
| Grant Creek Albany County | 25 | 1912 | Low | Poor |
| Granite Springs Laramie County | 90 | 1904 | High | Fair |
| Grandy Fremont County | 18 | 1957 | Significant | Fair |
| Graham Uinta County | 33 | 1945 | Low | Poor |
| Government No. 1 Stock Johnson County | 30 | 1962 | Low | Poor |
| Gothberg Natrona County | 13 | 1908 | Significant | Poor |
| Goshen No. 2 Goshen County | 12 | 1924 | Significant | Poor |
| Goshen No. 1 Goshen County | 17 | 1924 | Significant | Poor |
| Goshen Hole Goshen County | 26 | 1957 | Significant | Poor |
| Gose Crook County | 31 | 1977 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.