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 2551–2575 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Cap Rock #4 Custer County | 17 | 1954 | Low | Not Rated |
| Cap Rock #1 Custer County | 20 | 1966 | Low | Not Rated |
| Capricorn Hill County | 24 | 1965 | Low | Not Rated |
| Capacity Toole County | 14 | 1974 | Low | Not Rated |
| Canyon Lake Ravalli County | 21 | 1891 | High | Satisfactory |
| Canyon Ferry Dam Lewis and Clark County | 225 | 1954 | High | Not Available |
| Candee Richland County | 30 | 1978 | Low | Not Rated |
| Cancer Pondera County | 10 | 1930 | Low | Not Rated |
| Camp Detention Dam Valley County | 21 | 1954 | Low | Unsatisfactory |
| Campbell #1 Big Horn County | 16 | 1954 | Low | Not Rated |
| Calvin Sheridan County | 15 | 1945 | Low | Not Rated |
| California Coulee Hill County | 22 | 1955 | Low | Not Rated |
| California #1 Garfield County | 15 | 1974 | Low | Not Rated |
| Caldwell #5 Garfield County | 20 | 1950 | Low | Not Rated |
| Caldwell Garfield County | 20 | 1960 | Low | Not Rated |
| Cain Dam Valley County | 13 | 1901 | Low | Not Rated |
| Cain Sweet Grass County | 20 | 1965 | Low | Not Rated |
| Cafe Mocha Fergus County | 25 | 1950 | Low | Not Rated |
| Cactus Beaverhead County | 15 | 1947 | Low | Not Rated |
| Cabin Prairie County | 30 | 1954 | Low | Not Available |
| Bynum Reservoir Dam Teton County | 60 | 1926 | High | Satisfactory |
| Bye Gone Hill County | 24 | 1938 | Low | Not Rated |
| Bye-Bye Judith Basin County | 24 | 1953 | Low | Not Rated |
| Buxbaum #2 Richland County | 25 | 1949 | Low | Not Rated |
| Butcher Fergus 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.