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 2651–2675 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Box Elder Creek Dam Sheridan County | 80 | 1963 | High | Satisfactory |
| Box Elder #2 Dawson County | 20 | 1948 | Low | Not Rated |
| Bowman Lake 3 Powell County | 26 | 1962 | Low | Not Available |
| Bowman Lake 2 Powell County | 20 | 1961 | Low | Not Available |
| Bowman Lake 1 Powell County | 22 | 1958 | Low | Not Available |
| Born Free Richland County | 25 | 1960 | Low | Not Rated |
| Borer #2 Rosebud County | 14 | 1965 | Low | Not Rated |
| Boot Lake Dam Beaverhead County | 27 | 1912 | High | Poor |
| Booth (Chouteau) Chouteau County | 48 | 1961 | Low | Not Rated |
| Bonneau Chouteau County | 103 | 1940 | High | Satisfactory |
| Bonhomme Dam Park County | 26 | 1954 | Low | Not Rated |
| Bond Lake Dam Beaverhead County | 16 | 1977 | Low | Not Rated |
| Bonanza Meagher County | 44 | 1938 | Significant | Not Rated |
| Bomber Valley County | 13 | 1953 | Low | Not Rated |
| B O'Leary #2 Yellowstone County | 17 | 1950 | Low | Not Rated |
| Bokma Stillwater County | 20 | 1962 | Low | Not Rated |
| Boies Rosebud County | 16 | 1958 | Low | Not Rated |
| Bobs Mud Lake Hill County | 16 | 1976 | Low | Not Rated |
| Bobsland Dam Valley County | 18 | 1955 | Low | Not Rated |
| Bob #8 Garfield County | 20 | 1960 | Low | Not Rated |
| Bob #6 Garfield County | 20 | 1954 | Low | Not Rated |
| Bob #4 Garfield County | 20 | 1958 | Low | Not Rated |
| Bob #3 Garfield County | 20 | 1949 | Low | Not Rated |
| Bob #2 Garfield County | 20 | 1959 | Low | Not Rated |
| Bob #1 Garfield County | 20 | 1968 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.