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 2501–2525 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Balsam #1 Custer County | 32 | 1967 | Low | Not Rated |
| Ballard #1 Rosebud County | 12 | 1941 | Low | Not Rated |
| Bailey-Dees-Frey Hill County | 44 | 1968 | Low | Not Rated |
| Bailer Dam Dawson County | 33 | — | Low | Fair |
| Bahls Richland County | 10 | 1953 | Low | Not Rated |
| B&A Hammond #2 Big Horn County | 15 | 1968 | Low | Not Rated |
| B&A Hammond #1 Big Horn County | 20 | 1967 | Low | Not Rated |
| Badger Detention Dam Valley County | 19 | 1938 | Low | Unsatisfactory |
| Baby Food Fergus County | 15 | 1940 | Low | Not Rated |
| Baby Blue Daniels County | 18 | 1950 | Low | Not Rated |
| Babcock Deer Lodge County | 15 | 1953 | Low | Not Rated |
| Babbit Golden Valley County | 20 | 1955 | Low | Not Rated |
| Baba Blacksheep Chouteau County | 21 | 1903 | Low | Not Rated |
| B-6 #4 Custer County | 16 | 1959 | Low | Not Rated |
| Aznoe #1 Chouteau County | 10 | 1962 | Low | Not Rated |
| Aytolloha #1 Roosevelt County | 30 | 1957 | Low | Not Rated |
| Ayers Meagher County | 30 | 1946 | Low | Not Rated |
| Aye #1 Powder River County | 35 | 1942 | Low | Not Rated |
| Aybee Garfield County | 15 | 1960 | Low | Not Rated |
| Averill Flathead County | 32 | 1964 | Low | Not Rated |
| Austin Dam Phillips County | 12 | 1953 | Low | Not Rated |
| Austin #2 Phillips County | 12 | 1960 | Low | Not Rated |
| Atlas Dam Valley County | 18 | 1984 | Low | Not Rated |
| Atlas Judith Basin County | 20 | 1950 | Low | Not Rated |
| Atkins #2 Big Horn County | 12 | 1965 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.