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 2951–2975 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| 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 |
| Wolery Fish Pond Liberty County | 20 | 1955 | Low | Not Rated |
| Wolery Waters Hill County | 15 | 1945 | Significant | Not Rated |
| Wolf Coulee Dam Teton County | 38 | 2004 | Significant | Not Rated |
| Wolf Creek Rosebud County | 31 | 1976 | Low | Not Rated |
| Wolff Dawson County | 30 | 1946 | Low | Not Rated |
| Wolf Point Sewage Lagoon Roosevelt County | 8 | 1959 | Low | Not Rated |
| Woodard #4 Custer County | 20 | 1960 | Low | Not Rated |
| Woodchuck Missoula County | 25 | 1960 | Low | Not Rated |
| Woodhouse-Lattin Teton County | 34 | 1963 | Low | Not Rated |
| Wood Lake Dam Lewis and Clark County | 13 | 1955 | Low | Not Rated |
| Wood (Toole) Toole County | 19 | 1963 | Low | Not Rated |
| Workman #1 Rosebud County | 18 | 1948 | Low | Not Rated |
| Wyant Lake Ravalli County | 18 | 1909 | Low | Not Rated |
| Wyotana Ranch #4 Carter County | 18 | 1962 | Low | Not Rated |
| Wyotana Ranch #5 Carter County | 15 | 1962 | Low | Not Rated |
| Wyrick Fallon County | 22 | 1984 | Low | Not Rated |
| Yankee Doodle Tailings Dam Silver Bow County | 570 | 1972 | High | Satisfactory |
| Yantighem Chouteau County | 14 | 1961 | Low | Not Rated |
| Yastremski Dam Park County | 10 | 1950 | Low | Not Rated |
| Yellow Haired Custer Yellowstone County | 15 | 1967 | Low | Not Rated |
| Yellow Minni Stone Treasure County | 20 | 1965 | Low | Not Rated |
| Yellow Sarpy Treasure County | 25 | 1965 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.