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 1451–1475 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hook #49 Rosebud County | 18 | 1951 | Low | Not Rated |
| Hook #46 Rosebud County | 20 | 1952 | Low | Not Rated |
| Hook #4 Rosebud County | 34 | 1955 | Low | Not Rated |
| Hook #39 Rosebud County | 18 | 1957 | Low | Not Rated |
| Hook #37 Rosebud County | 25 | 1950 | Low | Not Rated |
| Hook #31 Rosebud County | 18 | 1957 | Low | Not Rated |
| Hook #30 Rosebud County | 18 | 1955 | Low | Not Rated |
| Hook #29 Rosebud County | 17 | 1967 | Low | Not Rated |
| Hook #27 Rosebud County | 12 | 1937 | Low | Not Rated |
| Hook #24 Rosebud County | 18 | 1955 | Low | Not Rated |
| Hook #23 Rosebud County | 16 | 1935 | Low | Not Rated |
| Hook #22 Rosebud County | 17 | 1950 | Low | Not Rated |
| Hook #20 Rosebud County | 18 | 1955 | Low | Not Rated |
| Hook #2 Custer County | 14 | 1960 | Low | Not Rated |
| Hook #19 Rosebud County | 18 | 1959 | Low | Not Rated |
| Hook #18 Rosebud County | 18 | 1967 | Low | Not Rated |
| Hook #15 Rosebud County | 15 | 1953 | Low | Not Rated |
| Hook #12 Rosebud County | 14 | 1956 | Low | Not Rated |
| Hook #10 Rosebud County | 18 | 1941 | Low | Not Rated |
| Homestead Retention Dam Prairie County | 21 | 1964 | Low | Unsatisfactory |
| Homestead Dam Roosevelt County | 14 | 1953 | Low | Poor |
| Homer #1 Carter County | 12 | 1951 | Low | Not Rated |
| Holzhey Sweet Grass County | 21 | 1956 | Low | Not Rated |
| Holly Sugar, Lower Richland County | 10 | 1929 | Low | Not Rated |
| Holloway Lake Ravalli County | 20 | 1900 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.