11Total Dams
7High Hazard
0Significant
Dam Safety in Jefferson County, Montana
Jefferson County has 11 dams tracked in the National Inventory of Dams. Of these, 7 are classified as high hazard — meaning failure would probably cause loss of human life. Currently, 1 dam has a condition assessment of poor or unsatisfactory.
The average dam in Jefferson County is 95 years old. The most common purpose is irrigation. The tallest dam is Delmoe Lake Dam at 60 ft.
Explore more: Oldest dams in Montana · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Delmoe Lake Dam | High | Poor | 60 | Irrigation | 1914 |
| Northern Pacific Reservoir Dam | High | Not assessed | 35 | Water Supply | 1935 |
| Park Lake Dam | High | Not assessed | 31 | Fish and Wildlife Pond | 1872 |
| Whitetail Dam | High | Not assessed | 28 | Irrigation | 1922 |
| Chessman Saddle Dam | High | Satisfactory | 27 | Water Supply | 1908 |
| Mt Tunnels Tailings Dam | High | Satisfactory | 0 | Tailings | |
| Golden Sunlight #2 Tailings Dam | High | Satisfactory | 0 | Tailings | |
| Keogh | Low | Not assessed | 30 | Irrigation | 1956 |
| Maney | Low | Not assessed | 21 | Irrigation | 1979 |
| Bison Retriever | Low | Not assessed | 15 | Fire Protection, Stock, Or Small Fish Pond | 1945 |
| B and B Fish Pond | Low | Not assessed | 8 | Fire Protection, Stock, Or Small Fish Pond | 1947 |