Dams in Flathead County, Montana
12Total Dams
8High Hazard
1Significant
Dam Safety in Flathead County, Montana
Flathead County has 12 dams tracked in the National Inventory of Dams. Of these, 8 are classified as high hazard — meaning failure would probably cause loss of human life. Another 1 carry a significant hazard classification. Currently, 2 dams have a condition assessment of poor or unsatisfactory.
The average dam in Flathead County is 79 years old. The most common purpose is irrigation. The tallest dam is Hungry Horse Dam at 564 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 |
|---|---|---|---|---|---|
| Hungry Horse Dam | High | Not Available | 564 | Flood Risk Reduction | 1953 |
| Hubbart | High | Poor | 130 | Irrigation | 1923 |
| Cedar Creek | High | Satisfactory | 93 | Water Supply | 1971 |
| Jessup Mill Pond Dam | High | Satisfactory | 28 | Water Supply | 1941 |
| Lion Lake Dam | High | Not Rated | 22 | Recreation | 1948 |
| Bigfork Diversion Dam | High | Poor | 22 | Hydroelectric | 1910 |
| Little Bitterroot | High | Not Available | 17 | Irrigation | 1917 |
| Smith Lake Dam | High | Satisfactory | 12 | Fish and Wildlife Pond | 1938 |
| Flathead County Stormwater Retention Pond | Significant | 0 | Flood Risk Reduction | 1999 | |
| Averill | Low | 32 | Irrigation | 1964 | |
| Ashley | Low | 10 | Irrigation | 1928 | |
| Whitefish Sewage Lagoon | Low | 9 | Other | 1962 |