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 976–1000 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Rough Draw Weston County | 33 | 1992 | Low | Not Rated |
| Rough Ride Johnson County | 38 | 2007 | Low | Fair |
| Roundup Draw Stock Sheridan County | 26 | 1935 | Low | Poor |
| Router No. 11 Johnson County | 35 | 2007 | Low | Poor |
| Router No. 49 Johnson County | 42 | 2006 | Low | Fair |
| Rucki Sheridan County | 28 | 1976 | Low | Poor |
| Ruff Detention Dam Park County | 46 | 2003 | Low | Unsatisfactory |
| Rule Wetland North Johnson County | 23 | 2001 | Low | Fair |
| Rulon Crook County | 34 | 2006 | Low | Fair |
| Rush Hot Springs County | 15 | 1911 | Low | Fair |
| Rush Creek Park County | 49 | 1973 | Low | Poor |
| Russell Storage Weston County | 28 | 1955 | Low | Poor |
| Ryan Brothers Lake Carbon County | 12 | 1924 | Low | Poor |
| Ryff and Klassert Platte County | 29 | 1914 | Low | Not Rated |
| Saddleback Converse County | 30 | 1944 | Low | Fair |
| Sage Creek Park County | 28 | 1982 | Low | Poor |
| Sage Creek Carbon County | 13 | 1914 | Low | Fair |
| Sand Draw Johnson County | 45 | 1968 | Low | Poor |
| Sand Draw No. 1 Dam Natrona County | 34 | 1961 | Low | Not Rated |
| Sand Mesa Dam 1 Fremont County | 12 | 1976 | Low | Not Available |
| Sand Mesa Dam 2 Fremont County | 11 | 1976 | Low | Not Available |
| Sandstone Johnson County | 39 | 1956 | Low | Fair |
| Sandstone Dam Big Horn County | 28 | 2003 | Low | Unsatisfactory |
| Saratoga Lake Carbon County | 13 | 1960 | Low | Fair |
| Satellite No. 2 Purge Storage Converse County | 23 | 1979 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.