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 1976–2000 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| General Ag Corporation #1 Blaine County | 18 | 1960 | Low | Not Rated |
| Gearhart #4 Rosebud County | 15 | 1940 | Low | Not Rated |
| Gearhart #15 Rosebud County | 16 | 1951 | Low | Not Rated |
| Gearhart #13 Rosebud County | 30 | 1953 | Low | Not Rated |
| Gearhart #11 Rosebud County | 20 | 1955 | Low | Not Rated |
| Gc Lande #1 Big Horn County | 19 | 1965 | Low | Not Rated |
| Gay #2 Powder River County | 40 | 1948 | Low | Not Rated |
| Gay #1 Powder River County | 28 | 1972 | Low | Not Rated |
| Garverich #1 Treasure County | 20 | 1952 | Low | Not Rated |
| Gartside Richland County | 31 | 1962 | High | Satisfactory |
| Garhart Garfield County | 14 | 1946 | Low | Not Rated |
| Gardner Dam Petroleum County | 27 | 1989 | Low | Not Rated |
| Gardner #2 (West Dam) Carter County | 27 | 1964 | Low | Not Rated |
| Gardner #1 (East Dam) Carter County | 46 | 1962 | Low | Not Rated |
| Garden Blaine County | 20 | 1930 | Low | Not Rated |
| Game Reservoir McCone County | 12 | 1970 | Low | Not Rated |
| Galt #32 Garfield County | 25 | 1950 | Low | Not Rated |
| Galt #29 Garfield County | 20 | 1960 | Low | Not Rated |
| Galt #28 Garfield County | 25 | 1950 | Low | Not Rated |
| Galt #22 Rosebud County | 15 | 1969 | Low | Not Rated |
| Gala Kul Liberty County | 20 | 1960 | Low | Not Rated |
| Ga Kramer #1 Garfield County | 18 | 1955 | Low | Not Rated |
| F Whitmus #2 McCone County | 21 | 1966 | Low | Not Rated |
| Fuddy Duddy Chouteau County | 12 | 1900 | Low | Not Rated |
| Fuago Hill County | 8 | 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.