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 351–375 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Bugs Detention Dam Valley County | 17 | 1977 | Low | Not Rated |
| Bull Pen #1 Pondera County | 30 | 1960 | Low | Not Rated |
| Bull Pen #2 Pondera County | 30 | 1960 | Low | Not Rated |
| Bumgardner Custer County | 20 | 1972 | Low | Not Rated |
| Bum Lamb Carter County | 15 | 1935 | Low | Not Rated |
| Bummer Sheridan County | 20 | 1967 | Low | Not Rated |
| Burch Carter County | 15 | 1963 | Low | Not Rated |
| Burgess #1 (Garfield) Garfield County | 20 | 1956 | Low | Not Rated |
| Burgess #2 Garfield County | 20 | 1969 | Low | Not Rated |
| Burgess Reservoir (Garfield) Garfield County | 30 | 1958 | Low | Not Rated |
| Burgess Reservoir (Richland) Richland County | 32 | 1949 | Low | Not Rated |
| Burgundy Hill County | 34 | 1953 | Low | Not Rated |
| Burke #1 Phillips County | 14 | 1954 | Low | Not Rated |
| Burkhartsmeyer Too Hill County | 13 | 1950 | Low | Not Rated |
| Burns Dam Sweet Grass County | 12 | 1960 | Low | Not Rated |
| Butcher Fergus County | 20 | 1960 | Low | Not Rated |
| Buxbaum #2 Richland County | 25 | 1949 | Low | Not Rated |
| Bye-Bye Judith Basin County | 24 | 1953 | Low | Not Rated |
| Bye Gone Hill County | 24 | 1938 | Low | Not Rated |
| Cabin Prairie County | 30 | 1954 | Low | Not Available |
| Cactus Beaverhead County | 15 | 1947 | Low | Not Rated |
| Cafe Mocha Fergus County | 25 | 1950 | Low | Not Rated |
| Cain Sweet Grass County | 20 | 1965 | Low | Not Rated |
| Cain Dam Valley County | 13 | 1901 | Low | Not Rated |
| Caldwell Garfield County | 20 | 1960 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.