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 826–850 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Fox, Bill Irrigation Wheatland County | 20 | 1941 | Low | Not Rated |
| Frady #1 Garfield County | 20 | 1963 | Low | Not Rated |
| Frady #1 (Mccone) McCone County | 20 | 1963 | Low | Not Rated |
| Frady #3 McCone County | 15 | 1967 | Low | Not Rated |
| Frank Jenson #1 Valley County | 14 | 1946 | Low | Not Rated |
| Fransen Toole County | 20 | 1922 | Low | Not Rated |
| Frazer #1 Petroleum County | 15 | 1958 | Low | Not Rated |
| Frazer East Dike Valley County | 17 | 1913 | Low | Not Rated |
| Fr Dam Blaine County | 34 | 2003 | Low | Not Rated |
| Freak Out Teton County | 20 | 1948 | Low | Not Rated |
| Fred Burr Lake Ravalli County | 24 | 1914 | Low | Not Rated |
| French #1 Custer County | 25 | 1950 | Low | Not Rated |
| French #10 Custer County | 26 | 1955 | Low | Not Rated |
| French #11 Custer County | 26 | 1960 | Low | Not Rated |
| French #12 Custer County | 24 | 1960 | Low | Not Rated |
| French #15 Rosebud County | 22 | 1960 | Low | Not Rated |
| French #16 Rosebud County | 20 | 1958 | Low | Not Rated |
| French #17 Rosebud County | 15 | 1953 | Low | Not Rated |
| French #18 Custer County | 18 | 1956 | Low | Not Rated |
| French #2 Custer County | 30 | 1947 | Low | Not Rated |
| French #5 Custer County | 17 | 1960 | Low | Not Rated |
| French #8 Custer County | 20 | 1950 | Low | Not Rated |
| French #9 Custer County | 22 | 1947 | Low | Not Rated |
| French Fry #1 Phillips County | 20 | 1945 | Low | Not Rated |
| French Fry #2 Phillips County | 25 | 1947 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.