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 376–400 of 1,283
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pump Platte County | 30 | 1968 | Low | Fair |
| Puffball Sheridan County | 27 | 1967 | Low | Fair |
| Puff Johnson County | 30 | 1976 | Low | Poor |
| Provost No. 2 Niobrara County | 23 | 1962 | Low | Fair |
| Prospect No. 1 Sublette County | 20 | 1914 | Low | Poor |
| Pratt Park Natrona County | 17 | 1980 | Low | Fair |
| Prairie Fremont County | 17 | 1915 | Low | Poor |
| Powers Stock Uinta County | 12 | 1965 | Low | Fair |
| Powell Sewage Lagoon System-Secondary C4 Park County | 11 | 1988 | Low | Fair |
| Powell Sewage Lagoon System-Secondary C3 Park County | 11 | 1988 | Low | Fair |
| Powell Sewage Lagoon System-Secondary C2 Park County | 11 | 1988 | Low | Fair |
| Powell Sewage Lagoon System-Secondary C1 Park County | 11 | 1988 | Low | Fair |
| Powell Sewage Lagoon System-Primary (2) Park County | 8 | 1988 | Low | Fair |
| Powell Sewage Lagoon System-Primary (1) Park County | 8 | 1988 | Low | Fair |
| Posy No. 1 Johnson County | 52 | 1995 | Low | Fair |
| Porter Teton County | 17 | 1951 | Low | Poor |
| Pork Puddle Laramie County | 25 | 1992 | Low | Fair |
| Porcupine Converse County | 35 | 1979 | Low | Poor |
| Pond No. 3 Sweetwater County | 37 | 1981 | Low | Fair |
| Ponderosa No. 3 Laramie County | 27 | 1999 | Low | Fair |
| Ponderosa Laramie County | 19 | 1996 | Low | Fair |
| Pond 2 (Dam A) Sweetwater County | 31 | 2015 | Low | Fair |
| Pond 1 Sweetwater County | 47 | 1981 | Low | Fair |
| Ponch Campbell County | 19 | 1968 | Low | Poor |
| Polo Sheridan County | 29 | 1999 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.