22Total Dams
6High Hazard
9Significant
Dam Safety in Missoula County, Montana
Missoula County has 22 dams tracked in the National Inventory of Dams. Of these, 6 are classified as high hazard — meaning failure would probably cause loss of human life. Another 9 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Missoula County is 82 years old. The most common purpose is irrigation. The tallest dam is Black Lake at 75 ft.
Explore more: Oldest dams in Montana · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Black Lake | High | Unsatisfactory | 75 | Recreation | 1967 |
| Jocko | High | Poor | 51 | Irrigation | 1937 |
| Isaac Creek | High | Satisfactory | 32 | Irrigation | 1948 |
| Blixit Creek | High | Satisfactory | 30 | Irrigation | 1961 |
| Carlton Lake #1 | High | Not assessed | 22 | Irrigation | 1899 |
| Spartan/playfair Park Retention Basins | High | Satisfactory | 8 | Flood Risk Reduction | 2003 |
| Big Lake | Significant | Not assessed | 30 | Water Supply | 1915 |
| Kona Ranch | Significant | Not assessed | 29 | Irrigation | 1959 |
| Smurfit-stone Container Storage Ponds | Significant | Not assessed | 25 | ||
| Little Lake | Significant | Not assessed | 25 | Water Supply | 1912 |
| Spring Creek | Significant | Not assessed | 15 | Irrigation | 1951 |
| Glacier Lake Dam | Significant | Not assessed | 12 | Water Supply | 1915 |
| Sanders Lake Dam #1 North | Significant | Not assessed | 10 | Water Supply | 1913 |
| Mckinley Lake | Significant | Not assessed | 7 | Water Supply | 1923 |
| Big Sky Lake Dam (missoula) | Significant | Not assessed | 7 | Recreation | |
| Jones Meadow Dam | Low | Not assessed | 34 | Irrigation | 1964 |
| Lepus | Low | Not assessed | 30 | Irrigation | 1956 |
| Woodchuck | Low | Not assessed | 25 | Irrigation | 1960 |
| Pollocks Jh Valley of the Moon | Low | Not assessed | 25 | Fire Protection, Stock, Or Small Fish Pond | 1960 |
| Wills, R. | Low | Not assessed | 20 | Irrigation | 1966 |
| Scheffer (missoula) | Low | Not assessed | 15 | Irrigation | 1948 |
| Peterson Lake | Low | Not assessed | 12 | Irrigation | 1920 |