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 |
|---|---|---|---|---|
| Golden Sunlight #2 Tailings Dam Jefferson County | — | — | High | Satisfactory |
| Green Hollow Creek Dam Madison County | 45 | 1990 | High | Satisfactory |
| Hanson Creek Dam Fergus County | 72 | 1974 | High | Satisfactory |
| Hauser Dam Lewis and Clark County | 125 | 1911 | High | Satisfactory |
| Hebgen Dam Gallatin County | 120 | 1915 | High | Satisfactory |
| Helena Valley Dam Lewis and Clark County | 94 | 1959 | High | Not Available |
| Hell Roaring Lake County | 30 | 1916 | High | Unsatisfactory |
| High Lake Ravalli County | 30 | 1938 | High | Poor |
| Hinman Dam Lewis and Clark County | 34 | 2000 | High | Not Rated |
| Holter Dam Lewis and Clark County | 124 | 1918 | High | Satisfactory |
| Hubbart Flathead County | 130 | 1923 | High | Poor |
| Hungry Horse Dam Flathead County | 564 | 1953 | High | Not Available |
| Isaac Creek Missoula County | 32 | 1948 | High | Satisfactory |
| Jackson Lake Meagher County | 32 | 1936 | High | Unsatisfactory |
| Jackson (Madison) Madison County | 34 | 1959 | High | Poor |
| Jawbone Dam #1 Wheatland County | 35 | 1966 | High | Satisfactory |
| Jawbone Dam #2 Wheatland County | 36 | 1966 | High | Satisfactory |
| Jawbone Dike #1 Wheatland County | 13 | 1966 | High | Satisfactory |
| Jessup Mill Pond Dam Flathead County | 28 | 1941 | High | Satisfactory |
| Jocko Missoula County | 51 | 1937 | High | Poor |
| Jordan Dam Park County | 38 | 1961 | High | Poor |
| Kelly Dam Beaverhead County | 26 | 1965 | High | Not Rated |
| Kerns Lake (Powell) Powell County | 26 | 1965 | High | Fair |
| Kistner Hardy Dam Gallatin County | 20 | 1945 | High | Satisfactory |
| Kootenai Dvlpmnt Impoundment Dam Lincoln County | 151 | 1980 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.