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 2426–2450 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bethel College #3 Rosebud County | 8 | 1960 | Low | Not Rated |
| Bethel #7 Petroleum County | 18 | 1955 | Low | Not Rated |
| Bethel #4 Petroleum County | 20 | 1955 | Low | Not Rated |
| Bethel #11 Petroleum County | 22 | 1957 | Low | Not Rated |
| Bethel #1 Petroleum County | 20 | 1955 | Low | Not Rated |
| Betelguese Liberty County | 10 | 1960 | Low | Not Rated |
| Best Rocky Twist Blaine County | 20 | 1965 | Low | Not Rated |
| Bertoline #1 Carbon County | 10 | 1953 | Low | Not Rated |
| Bertino Roosevelt County | 17 | 1937 | Low | Not Rated |
| Berthelote Toole County | 25 | 1955 | Low | Not Rated |
| Berrys Land #4 McCone County | 30 | 1975 | Low | Not Rated |
| Berrys Land #3 McCone County | 35 | 1961 | Low | Not Rated |
| Berrys Land #2 McCone County | 20 | 1965 | Low | Not Rated |
| Berrys Land McCone County | 24 | 1952 | Low | Not Rated |
| Berland Skorupa Berland Pondera County | 10 | 1940 | Low | Not Rated |
| Berkholder Dam Toole County | 24 | 1904 | Low | Not Rated |
| Bergstrom'S Farms #2 Pondera County | 10 | 1936 | Low | Not Rated |
| Bergstrom'S Farms Pondera County | 10 | 1936 | Low | Not Rated |
| Berg Wheatland County | 20 | 1948 | Low | Not Rated |
| Benson Beaverhead County | 35 | 1952 | Low | Not Rated |
| Benjamin, H.E. Jr. Toole County | 20 | 1954 | Low | Not Rated |
| Benes Bank Fergus County | 15 | 1960 | Low | Not Rated |
| Belushi Roosevelt County | 12 | 1957 | Low | Not Rated |
| Belgrade Waste Water Treatment Pond 1 Gallatin County | 18 | — | Low | Not Rated |
| Beley Pond Sweet Grass County | 14 | 1940 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.