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 1951–1975 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Giacometto #1 Powder River County | 38 | 1953 | Significant | Not Rated |
| Ghost #6 Valley County | 15 | 1966 | Low | Not Rated |
| Ghost #5 Valley County | 17 | 1953 | Low | Not Rated |
| Ghost #3 Valley County | 15 | 1930 | Low | Not Rated |
| Ghost #2 Valley County | 30 | 1950 | Low | Not Rated |
| Ghost #1 Valley County | 20 | 1960 | Low | Not Rated |
| Gettin'High Roosevelt County | 15 | 1957 | Low | Not Rated |
| Get Down Garfield County | 29 | 1952 | Low | Not Rated |
| Gertrude Phillips County | 20 | 1945 | Low | Not Rated |
| German Reservoir Toole County | 15 | 1900 | Low | Not Rated |
| German Bread Blaine County | 44 | 1950 | Low | Not Rated |
| German #9 Carter County | 25 | 1959 | Low | Not Rated |
| German #3 Carter County | 20 | 1955 | Low | Not Rated |
| German #2 Carter County | 20 | 1954 | Low | Not Rated |
| Gerdts Golden Valley County | 25 | 1940 | Low | Not Rated |
| Gerald Kane Blaine County | 39 | 1965 | Significant | Not Rated |
| Gerald Craft #6 Carter County | 20 | 1967 | Low | Not Rated |
| Gerald Craft #5 Carter County | 12 | 1944 | Low | Not Rated |
| Gerald Craft #3 Carter County | 20 | 1962 | Low | Not Rated |
| Gerald Craft #2 Carter County | 14 | 1955 | Low | Not Rated |
| Gerald Craft #1 Carter County | 9 | 1959 | Low | Not Rated |
| George Welch Hill County | 35 | 1950 | Low | Not Rated |
| Georgetown Dam Deer Lodge County | 55 | 1900 | High | Satisfactory |
| George Rath #3 Golden Valley County | 12 | 1950 | Low | Not Rated |
| George Rath #2 Golden Valley County | 14 | 1953 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.