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 2026–2050 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| French #10 Custer County | 26 | 1955 | Low | Not Rated |
| French #1 Custer County | 25 | 1950 | Low | Not Rated |
| Fred Burr Lake (Granite) Granite County | 21 | 1930 | High | Satisfactory |
| Fred Burr Lake Ravalli County | 24 | 1914 | Low | Not Rated |
| Freak Out Teton County | 20 | 1948 | Low | Not Rated |
| Fr Dam Blaine County | 34 | 2003 | Low | Not Rated |
| Frazer East Dike Valley County | 17 | 1913 | Low | Not Rated |
| Frazer #1 Petroleum County | 15 | 1958 | Low | Not Rated |
| Fransen Toole County | 20 | 1922 | Low | Not Rated |
| Frank Jenson #1 Valley County | 14 | 1946 | Low | Not Rated |
| Frady #3 McCone County | 15 | 1967 | Low | Not Rated |
| Frady #1 (Mccone) McCone County | 20 | 1963 | Low | Not Rated |
| Frady #1 Garfield County | 20 | 1963 | Low | Not Rated |
| Fox, Bill Irrigation Wheatland County | 20 | 1941 | Low | Not Rated |
| Fox #5 Custer County | 32 | 1958 | Low | Not Rated |
| Fox #4 Custer County | 26 | 1957 | Low | Not Rated |
| Fox #3 Custer County | 24 | 1957 | Low | Not Rated |
| Fox #1 Custer County | 19 | 1955 | Low | Not Rated |
| Fox Custer County | 25 | 1961 | Low | Not Rated |
| Fowl Mouth Pondera County | 30 | 1950 | Significant | Not Rated |
| Fowler Dam #2 (Pondera) Pondera County | 12 | 1950 | Significant | Not Rated |
| Fowler #1 (Pondera) Pondera County | 30 | 1909 | Low | Not Rated |
| Fourteen Garfield County | 14 | 1955 | Low | Not Rated |
| Four Horns Glacier County | 50 | 1915 | High | Satisfactory |
| Foulweather Detention Dam Valley County | 30 | 1966 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.