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 26–50 of 113
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Clover Drop Dam Valley County | 15 | — | Low | Satisfactory |
| Coal Creek Drop Dam Prairie County | 31 | — | Low | Satisfactory |
| Colstrip Diversion Dam Rosebud County | 44 | 1976 | High | Satisfactory |
| Colstrip Evaporation Pond Dam Rosebud County | 88 | 1976 | High | Satisfactory |
| Costich Dam Lincoln County | 29 | 1956 | High | Satisfactory |
| Cowpath Dam Toole County | 65 | 1967 | High | Satisfactory |
| Crazy Mountain Ranch Park County | 36 | 1968 | High | Satisfactory |
| Crisafulli Lake Dawson County | 22 | 1959 | High | Satisfactory |
| Dead Horse Detention Dam Valley County | 16 | 1960 | Low | Satisfactory |
| Deadmans Basin Dam Wheatland County | 60 | 1941 | High | Satisfactory |
| Deadmans Basin Dike Wheatland County | 23 | 1941 | High | Satisfactory |
| Duck Creek Retention Dam Petroleum County | 16 | 2003 | High | Satisfactory |
| East Boulder Tailings Dam Sweet Grass County | — | — | High | Satisfactory |
| East Dam Deer Lodge County | 80 | — | Significant | Satisfactory |
| East Fork Hill County | 76 | 2007 | High | Satisfactory |
| East Fork Dam Fergus County | 93 | 1974 | High | Satisfactory |
| Eureka Reservoir West Dike Teton County | 12 | 1936 | High | Satisfactory |
| Flower Creek Dam Lincoln County | 59 | 2016 | High | Satisfactory |
| Four Horns Glacier County | 50 | 1915 | High | Satisfactory |
| Fred Burr Lake (Granite) Granite County | 21 | 1930 | High | Satisfactory |
| Gartside Richland County | 31 | 1962 | High | Satisfactory |
| Georgetown Dam Deer Lodge County | 55 | 1900 | High | Satisfactory |
| Glacier Lake North Dam Carbon County | 57 | 1937 | High | Satisfactory |
| Glacier Lake South Dam Carbon County | 20 | 1937 | High | Satisfactory |
| Golden Sunlight #2 Tailings Dam Jefferson County | — | — | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.