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 276–300 of 1,490
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Snyder No. 1 Big Horn County | 21 | 1995 | Low | Fair |
| Snyder Homestead Campbell County | 27 | 1963 | Low | Poor |
| Snyder Creek Det Dam X Fremont County | 38 | 2003 | High | Unsatisfactory |
| Snyder Park County | 35 | 2000 | Low | Satisfactory |
| Snowflake Johnson County | 40 | 2006 | Low | Fair |
| Snider No. 6 Sheridan County | 25 | 1952 | Low | Poor |
| Snider No. 1 Town Draw Sheridan County | 24 | 1961 | Low | Fair |
| Snafu Park County | 40 | 1967 | Low | Poor |
| Smith Stockwater Converse County | 36 | 1952 | Low | Poor |
| Smith Ranch - Highland Satellite No. 2 Dam Converse County | 18 | 1979 | Low | Satisfactory |
| Smith No. 2 Johnson County | 25 | 1959 | Low | Fair |
| Smith No. 1 Johnson County | 28 | 1957 | Low | Poor |
| Smiley Reservoir Carbon County | 47 | 2000 | Low | Poor |
| Slough Reservoir Fremont County | 16 | 1939 | Low | Fair |
| Slide Weston County | 27 | 1961 | Low | Poor |
| Slaughters & Patzold Converse County | 24 | 1940 | Low | Fair |
| Slates No. 1 Converse County | 27 | 1956 | Low | Poor |
| Skull Point Dam Lincoln County | 27 | 1941 | Low | Not Rated |
| Skinner Goshen County | 25 | 1973 | Low | Fair |
| Sixty Seven Sublette County | 32 | 1942 | High | Fair |
| Six Mile Natrona County | 41 | 1951 | Low | Poor |
| Sinnard Goshen County | 26 | 1935 | Significant | Fair |
| Simmons Johnson County | 24 | 1940 | Low | Poor |
| Simmons Johnson County | 25 | 1962 | Low | Fair |
| Silver Lake Sublette County | 32 | 1953 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.