Montana Dams
2,990 dams tracked by the National Inventory of Dams
Total Dams
2,990
High Hazard
188
6.3%
Poor / Unsatisfactory
132
Average Age
74 yrs
Hazard Classification
High188 (6.3%)
Significant193 (6.5%)
Low2,606 (87.2%)
Condition Assessment
Satisfactory113 (3.8%)
Fair44 (1.5%)
Poor / Unsatisfactory132 (4.4%)
Not Rated2,701 (90.3%)
Federal
278
State
151
Local
84
Private
2,466
Tallest Dams
- Yankee Doodle Tailings Dam570 ft
- Hungry Horse Dam564 ft
- Libby Dam422 ft
- Noxon Rapids260 ft
- Fort Peck Dam256 ft
High Hazard Dams
- Yankee Doodle Tailings DamHigh
- Hungry Horse DamHigh
- Libby DamHigh
- Noxon RapidsHigh
- Fort Peck DamHigh
Poor Condition Dams
All Dams in Montana
Showing 26–50 of 79
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| High Lake Ravalli County | 30 | 1938 | High | Poor |
| Homestead Dam Roosevelt County | 14 | 1953 | Low | Poor |
| Hubbart Flathead County | 130 | 1923 | High | Poor |
| Iverson Retention Dam Petroleum County | 22 | 1968 | Low | Poor |
| Jackson (Madison) Madison County | 34 | 1959 | High | Poor |
| Jocko Missoula County | 51 | 1937 | High | Poor |
| Jordan Dam Park County | 38 | 1961 | High | Poor |
| Katy's Lake Dam Sheridan County | 10 | 1990 | Low | Poor |
| Kootenai Dvlpmnt Impoundment Dam Lincoln County | 151 | 1980 | High | Poor |
| Lake Thibadeau Dam Hill County | 18 | 1938 | Low | Poor |
| Little Bear/Us #37 Dam Petroleum County | 17 | — | Low | Poor |
| Lower Glasston Dam Sweet Grass County | 30 | 1912 | High | Poor |
| Lower Willow Creek Dam Granite County | 96 | 1962 | High | Poor |
| Macdonald Pond Dam Beaverhead County | 9 | 1953 | Low | Poor |
| Martinsdale, East Dam Wheatland County | 49 | 1939 | High | Poor |
| McLaren Dam Blaine County | 24 | 1890 | Low | Poor |
| Medicine Lake Dam No. 10 Sheridan County | 8 | 1935 | Low | Poor |
| Medicine Lake Dam No. 11 Sheridan County | 9 | 1935 | Low | Poor |
| Medicine Lake Dam No. 12 Sheridan County | 10 | 1935 | Low | Poor |
| Medicine Lake Dam No. 4 Sheridan County | 15 | 1935 | Low | Poor |
| Monida Creek #1 Du Dam Beaverhead County | 10 | 2003 | Low | Poor |
| Monida Creek #2 Du Dam Beaverhead County | 9 | 2003 | Low | Poor |
| Newlan Creek Dam Meagher County | 131 | 1977 | High | Poor |
| North Tucks Slough Dam Beaverhead County | 13 | 1990 | Low | Poor |
| Oliver Detention Dam Carter County | 15 | 2003 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.