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 1426–1450 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hougan #7 Musselshell County | 12 | 1950 | Low | Not Rated |
| Hougan #6 Musselshell County | 10 | 1950 | Low | Not Rated |
| Hougan #5 Musselshell County | 10 | 1955 | Low | Not Rated |
| Hot Bar #1 Dawson County | 15 | 1955 | Low | Not Rated |
| Horte Lake County | 16 | 1916 | Low | Not Rated |
| Horse Trough McCone County | 15 | 1960 | Low | Not Rated |
| Horgan Reservoir Valley County | 20 | 1952 | Low | Not Rated |
| Horab Roosevelt County | 32 | 1945 | Low | Not Rated |
| Hope Et Al #1 Treasure County | 15 | 1959 | Low | Not Rated |
| Hoover Creek Dam Powell County | 25 | 1972 | Low | Not Rated |
| Hooker Garfield County | 15 | 1938 | Low | Not Rated |
| Hook #9 Rosebud County | 16 | 1945 | Low | Not Rated |
| Hook #8 Rosebud County | 17 | 1950 | Low | Not Rated |
| Hook #72 Rosebud County | 22 | 1970 | Low | Not Rated |
| Hook #70 Rosebud County | 27 | 1953 | Low | Not Rated |
| Hook #69 Rosebud County | 15 | 1959 | Low | Not Rated |
| Hook #67 Rosebud County | 19 | 1960 | Low | Not Rated |
| Hook #64 Rosebud County | 15 | 1954 | Low | Not Rated |
| Hook #62 Rosebud County | 35 | 1960 | Low | Not Rated |
| Hook #61 Rosebud County | 16 | 1957 | Low | Not Rated |
| Hook #59 Rosebud County | 17 | 1954 | Low | Not Rated |
| Hook #55 Rosebud County | 33 | 1958 | Low | Not Rated |
| Hook #52 Rosebud County | 20 | 1968 | Low | Not Rated |
| Hook #51 Rosebud County | 33 | 1950 | Low | Not Rated |
| Hook #50 Rosebud County | 18 | 1958 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.