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 1401–1425 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hutchison #2 Powder River County | 25 | 1950 | Low | Not Rated |
| Hutchison #1 Powder River County | 25 | 1950 | Low | Not Rated |
| Hurricane Detention Dam Valley County | 23 | 1957 | Low | Unsatisfactory |
| Hunter (Valley) Valley County | 20 | 1963 | Low | Not Rated |
| Hunter Creek Prairie County | 30 | 1932 | Low | Not Rated |
| Hunt #7 Rosebud County | 20 | 1960 | Low | Not Rated |
| Hunt #6 Rosebud County | 18 | 1958 | Low | Not Rated |
| Hunt #2 Rosebud County | 15 | 1964 | Low | Not Rated |
| Hunnes #1 Rosebud County | 20 | 1929 | Low | Not Rated |
| Hunky Dorie Toole County | 15 | 1920 | Low | Not Rated |
| Hungover Blaine County | 12 | 1977 | Low | Not Rated |
| Hundred Dollar Bill Meagher County | 20 | 1960 | Low | Not Rated |
| Humperdinck #2 Beaverhead County | 15 | 1964 | Low | Not Rated |
| Humperdinck #1 Beaverhead County | 15 | 1964 | Low | Not Rated |
| Hughes Junior #1 Fergus County | 12 | 1970 | Low | Not Rated |
| Huffman #1 Dawson County | 10 | 1954 | Low | Not Rated |
| Huckins #2 Powder River County | 26 | 1942 | Low | Not Rated |
| Hubbard #1 Carter County | 12 | 1920 | Low | Not Rated |
| H Stensvad #2 Petroleum County | 18 | 1950 | Low | Not Rated |
| H Stensvad #1 Petroleum County | 18 | 1960 | Low | Not Rated |
| H S Dam Richland County | 18 | 1885 | Low | Not Rated |
| Howard Coulee #1 Petroleum County | 25 | 1939 | Low | Not Rated |
| Howard McCone County | 20 | 1960 | Low | Not Rated |
| Hovland Valley County | 16 | 1959 | Low | Not Rated |
| Hound Creek Cascade County | 30 | 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.