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 2401–2425 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Corral Junction Detention #2 Dam Valley County | 20 | 1954 | Low | Unsatisfactory |
| Cornwell Valley County | 23 | 1952 | Significant | Not Rated |
| Cornhuskers Sheridan County | 25 | 1939 | Low | Not Rated |
| Cope Fergus County | 16 | 1960 | Low | Not Rated |
| Cooper-Adams #6 Fergus County | 13 | 1960 | Low | Not Rated |
| Cooper-Adams #5 Fergus County | 13 | 1950 | Low | Not Rated |
| Cooper-Adams #4 Fergus County | 15 | 1960 | Low | Not Rated |
| Cooper Adams #1 Fergus County | 18 | 1950 | Low | Not Rated |
| Cooney Carbon County | 102 | 1937 | High | Poor |
| Coon Richland County | 15 | 1950 | Low | Not Rated |
| Cool Cotton Hill County | 20 | 1938 | Significant | Not Rated |
| Cool Black Rock Hill County | 30 | 1919 | Low | Not Rated |
| Conover #2 Yellowstone County | 25 | 1974 | Low | Not Rated |
| Conover #1 Yellowstone County | 15 | 1970 | Low | Not Rated |
| Conleys Lake (Powell) Powell County | 11 | 1958 | Low | Not Rated |
| Conehead Dam Valley County | 12 | — | Low | Not Rated |
| Complimentary Judith Basin County | 30 | 1950 | Low | Not Rated |
| Como Dam Ravalli County | 76 | 1910 | High | Not Available |
| Colvin #2 Custer County | 13 | 1946 | Low | Not Rated |
| Colver Fergus County | 22 | 1939 | Low | Not Rated |
| Colstrip Evaporation Pond Dam Rosebud County | 88 | 1976 | High | Satisfactory |
| Colstrip Diversion Dam Rosebud County | 44 | 1976 | High | Satisfactory |
| Collins Detention Reservoir Valley County | 41 | 1957 | Low | Not Rated |
| Collins Valley County | 22 | 1955 | Low | Not Rated |
| Colen Phillips County | 20 | 1945 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.