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 426–450 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Caldwell Garfield County | 20 | 1960 | Low | Not Rated |
| Caldwell #5 Garfield County | 20 | 1950 | Low | Not Rated |
| California #1 Garfield County | 15 | 1974 | Low | Not Rated |
| California Coulee Hill County | 22 | 1955 | Low | Not Rated |
| Calvin Sheridan County | 15 | 1945 | Low | Not Rated |
| Campbell #1 Big Horn County | 16 | 1954 | Low | Not Rated |
| Camp Detention Dam Valley County | 21 | 1954 | Low | Unsatisfactory |
| Cancer Pondera County | 10 | 1930 | Low | Not Rated |
| Candee Richland County | 30 | 1978 | Low | Not Rated |
| Canyon Ferry Dam Lewis and Clark County | 225 | 1954 | High | Not Available |
| Canyon Lake Ravalli County | 21 | 1891 | High | Satisfactory |
| Capacity Toole County | 14 | 1974 | Low | Not Rated |
| Capricorn Hill County | 24 | 1965 | Low | Not Rated |
| Cap Rock #1 Custer County | 20 | 1966 | Low | Not Rated |
| Cap Rock #4 Custer County | 17 | 1954 | Low | Not Rated |
| Capudj Hill County | 10 | 1965 | Low | Not Rated |
| Carbone Flood Control Dam Big Horn County | 32 | 2002 | High | Satisfactory |
| Carlton Lake #1 Missoula County | 22 | 1899 | High | Not Rated |
| Carpenter Creek Valley County | 16 | 1950 | Low | Not Rated |
| Carson (Mn-66) Blaine County | 45 | 1940 | Low | Not Rated |
| Carter Pond, Lower (Fergus) Fergus County | 21 | 1938 | Significant | Not Rated |
| Carter Pond, Upper (Fergus) Fergus County | 21 | 1951 | Significant | Not Rated |
| Carters Reservoir Phillips County | 25 | 1954 | Low | Not Rated |
| Caruthers Lake Powell County | 11 | 1973 | Low | Not Available |
| Castle Rock Reservoir Dam Rosebud County | 67 | 1976 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.