Dams in Jefferson County, Montana
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 dams have 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
Data note: Hazard potential describes the consequences if a dam failed; it does not predict the likelihood of failure. Inspection, condition, and emergency-plan fields can be incomplete or delayed. Check state dam-safety officials and local emergency managers for official guidance.
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Delmoe Lake Dam | High | Poor | 60 | Irrigation | 1914 |
| Northern Pacific Reservoir Dam | High | Not Rated | 35 | Water Supply | 1935 |
| Park Lake Dam | High | Not Rated | 31 | Fish and Wildlife Pond | 1872 |
| Whitetail Dam | High | Not Rated | 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 Available | 30 | Irrigation | 1956 |
| Maney | Low | Not Rated | 21 | Irrigation | 1979 |
| Bison Retriever | Low | 15 | Fire Protection, Stock, Or Small Fish Pond | 1945 | |
| B And B Fish Pond | Low | 8 | Fire Protection, Stock, Or Small Fish Pond | 1947 |