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 451–475 of 543
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Spencer Weston County | 45 | 1952 | Significant | Poor |
| Sphaeralcea Sublette County | 28 | 1974 | Low | Poor |
| Spring Creek (Enlargement) Carbon County | 35 | 1921 | Significant | Poor |
| Spring Creek No. 1 Platte County | 30 | 1954 | Low | Poor |
| Spring Draw Weston County | 25 | 1959 | Low | Poor |
| State Weston County | 17 | 1953 | Low | Poor |
| Steffensen Johnson County | 44 | 1950 | Low | Poor |
| Steffenson No. 2 Johnson County | 41 | 1971 | Low | Poor |
| Stephenson Carbon County | 9 | 1909 | Low | Poor |
| Steven Crook County | 20 | 1959 | Low | Poor |
| Story No. 1 Niobrara County | 22 | 1961 | Low | Poor |
| Strong No. 1 Albany County | 24 | 1951 | Low | Poor |
| Strong No. 4 Albany County | 28 | 1958 | Low | Poor |
| Stump Campbell County | 29 | 1980 | Low | Poor |
| Sturgeon No. 1 Albany County | 21 | 1949 | Low | Poor |
| Sturgeon No. 2 Albany County | 25 | 1949 | Low | Poor |
| Sturgeon No. 3 Albany County | 30 | 1950 | Low | Poor |
| Sucker Lake Carbon County | 13 | 1931 | Low | Poor |
| Summit Carbon County | 25 | 1954 | Low | Poor |
| Sundby Albany County | 21 | 1945 | Low | Poor |
| Sundby No. 2 Albany County | 26 | 1971 | Low | Poor |
| Sunset Sublette County | 20 | 1966 | Low | Poor |
| Suranyi Stock Campbell County | 29 | 1953 | Low | Poor |
| Swan Laramie County | 25 | 1907 | Significant | Poor |
| Swan Creek No. 2 Park County | 15 | 1908 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.