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 126–150 of 188
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Eureka Reservoir Dam Teton County | 32 | 1936 | High | Poor |
| East Fork Dam Fergus County | 93 | 1974 | High | Satisfactory |
| East Fork Hill County | 76 | 2007 | High | Satisfactory |
| East Boulder Tailings Dam Sweet Grass County | — | — | High | Satisfactory |
| Duck Creek Retention Dam Petroleum County | 16 | 2003 | High | Satisfactory |
| Dry Blood Creek Dam Petroleum County | 40 | 1964 | High | Fair |
| Doney Lake #2 (Powell) Powell County | 14 | 1942 | High | Fair |
| Doggett Reservoir Meagher County | 50 | 1948 | High | Fair |
| Depression Detention Dam Carbon County | 42 | 1968 | High | Poor |
| Delmoe Lake Dam Jefferson County | 60 | 1914 | High | Poor |
| Deadmans Basin Dike Wheatland County | 23 | 1941 | High | Satisfactory |
| Deadmans Basin Dam Wheatland County | 60 | 1941 | High | Satisfactory |
| Crow Lake County | 99 | 1933 | High | Poor |
| Crisafulli Lake Dawson County | 22 | 1959 | High | Satisfactory |
| Crazy Mountain Ranch Park County | 36 | 1968 | High | Satisfactory |
| Cowpath Dam Toole County | 65 | 1967 | High | Satisfactory |
| Cottonwood Dam (Park) Park County | 39 | 1953 | High | Poor |
| Costich Dam Lincoln County | 29 | 1956 | High | Satisfactory |
| Cooney Carbon County | 102 | 1937 | High | Poor |
| Como Dam Ravalli County | 76 | 1910 | High | Not Available |
| Colstrip Evaporation Pond Dam Rosebud County | 88 | 1976 | High | Satisfactory |
| Colstrip Diversion Dam Rosebud County | 44 | 1976 | High | Satisfactory |
| Cochrane Cascade County | 105 | 1957 | High | Fair |
| Clark Canyon Dam Beaverhead County | 148 | 1964 | High | Not Available |
| Chessman Saddle Dam Jefferson County | 27 | 1908 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.