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 2551–2575 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Willow Blaine County | 12 | 1957 | Low | Not Rated |
| Willow Belt Cascade County | 10 | 1951 | Low | Not Rated |
| Willow Creek Flat Dam (Valley) Valley County | 16 | — | Low | Unsatisfactory |
| Willow (Musselshell) Musselshell County | 20 | 1935 | Low | Not Rated |
| Wills, R. Missoula County | 20 | 1966 | Low | Not Rated |
| Wilma Roosevelt County | 15 | 1960 | Low | Not Rated |
| Wilson #1 (Toole) Toole County | 20 | 1935 | Low | Not Rated |
| Wilson #2 (Toole) Toole County | 25 | 1935 | Low | Not Rated |
| Win #1 Richland County | 25 | 1947 | Low | Not Rated |
| Win #2 Richland County | 15 | 1951 | Low | Not Rated |
| Winkum Dam Valley County | 28 | — | Low | Satisfactory |
| Wishbone Richland County | 20 | 1960 | Low | Not Rated |
| Witcher Custer County | 24 | 1954 | Low | Not Rated |
| Withee #1 Garfield County | 26 | 1970 | Low | Not Rated |
| Withee #2 Garfield County | 20 | 1967 | Low | Not Rated |
| W Krutzfeldt #1 Custer County | 21 | 1960 | Low | Not Rated |
| W Krutzfeldt #2 Custer County | 27 | 1968 | Low | Not Rated |
| W Krutzfeldt #3 Custer County | 26 | 1960 | Low | Not Rated |
| W Krutzfeldt #4 Custer County | 24 | 1950 | Low | Not Rated |
| W Miller McCone County | 12 | 1950 | Low | Not Rated |
| W Miller #1 McCone County | 18 | 1952 | Low | Not Rated |
| Wm Knight #1 Phillips County | 30 | 1940 | Low | Not Rated |
| Wm Knight #2 Phillips County | 30 | 1942 | Low | Not Rated |
| Wm Pluhar Garfield County | 18 | 1949 | Low | Not Rated |
| Wold Dawson County | 30 | 1936 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.