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 76–100 of 188
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lower Dry Fork Sanders County | 37 | 1921 | High | Fair |
| Lower Baker Dam Fallon County | 23 | 1908 | High | Satisfactory |
| Little Sleeping Child Creek Dam Ravalli County | 35 | 1927 | High | Satisfactory |
| Little Bitterroot Flathead County | 17 | 1917 | High | Not Available |
| Lion Lake Dam Flathead County | 22 | 1948 | High | Not Rated |
| Lima Beaverhead County | 56 | 1934 | High | Satisfactory |
| Libby Dam Lincoln County | 422 | 1973 | High | Not Available |
| Lebo #3,East Dam Wheatland County | 27 | 1973 | High | Satisfactory |
| Lakeside Yellowstone County | 22 | — | High | Satisfactory |
| Lake Sherburne Dam Glacier County | 109 | 1919 | High | Not Available |
| Lake Frances North Dam Pondera County | 22 | 1909 | High | Satisfactory |
| Lake Frances East Dam Pondera County | 59 | 1909 | High | Satisfactory |
| Lake Creek Lincoln County | 44 | 1917 | High | Satisfactory |
| Kootenai Dvlpmnt Impoundment Dam Lincoln County | 151 | 1980 | High | Poor |
| Kistner Hardy Dam Gallatin County | 20 | 1945 | High | Satisfactory |
| Kerns Lake (Powell) Powell County | 26 | 1965 | High | Fair |
| Kelly Dam Beaverhead County | 26 | 1965 | High | Not Rated |
| Jordan Dam Park County | 38 | 1961 | High | Poor |
| Jocko Missoula County | 51 | 1937 | High | Poor |
| Jessup Mill Pond Dam Flathead County | 28 | 1941 | High | Satisfactory |
| Jawbone Dike #1 Wheatland County | 13 | 1966 | High | Satisfactory |
| Jawbone Dam #2 Wheatland County | 36 | 1966 | High | Satisfactory |
| Jawbone Dam #1 Wheatland County | 35 | 1966 | High | Satisfactory |
| Jackson (Madison) Madison County | 34 | 1959 | High | Poor |
| Jackson Lake Meagher County | 32 | 1936 | High | Unsatisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.