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 1876–1900 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mitvalsky #1 Custer County | 17 | 1949 | Low | Not Rated |
| M Newby Phillips County | 20 | 1955 | Low | Not Rated |
| Moccasin Detention Dam Valley County | 22 | 1957 | Low | Unsatisfactory |
| Moes Chouteau County | 35 | 1964 | Low | Not Rated |
| Moffitt #1 Custer County | 17 | 1965 | Low | Not Rated |
| Moffitt #2 Custer County | 20 | 1965 | Low | Not Rated |
| Mogen #1 Rosebud County | 15 | 1970 | Low | Not Rated |
| Mohair #1 Blaine County | 20 | 1945 | Low | Not Rated |
| Mohair #2 Blaine County | 25 | 1945 | Low | Not Rated |
| Monarch #3 Custer County | 24 | 1953 | Low | Not Rated |
| Moncarpic Chouteau County | 20 | 1948 | Low | Not Rated |
| Monida Creek #1 Du Dam Beaverhead County | 10 | 2003 | Low | Poor |
| Monida Creek #2 Du Dam Beaverhead County | 9 | 2003 | Low | Poor |
| Montana #10 Rosebud County | 18 | 1960 | Low | Not Rated |
| Montana #13 Rosebud County | 7 | 1958 | Low | Not Rated |
| Montana #14 Rosebud County | 18 | 1960 | Low | Not Rated |
| Montana #17 Rosebud County | 18 | 1940 | Low | Not Rated |
| Montana #18 Rosebud County | 15 | 1959 | Low | Not Rated |
| Montana #19 Rosebud County | 20 | 1956 | Low | Not Rated |
| Montana #21 Rosebud County | 12 | 1960 | Low | Not Rated |
| Montana #26 Garfield County | 18 | 1970 | Low | Not Rated |
| Montana #28 Garfield County | 20 | 1958 | Low | Not Rated |
| Montana #3 Rosebud County | 19 | 1956 | Low | Not Rated |
| Montana #31 Musselshell County | 12 | 1950 | Low | Not Rated |
| Montana #32 Musselshell 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.