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 1–25 of 193
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Wolf Coulee Dam Teton County | 38 | 2004 | Significant | Not Rated |
| Wolery Waters Hill County | 15 | 1945 | Significant | Not Rated |
| Winifred, North Fergus County | 24 | 1936 | Significant | Not Rated |
| White Elk (Wheatland) Wheatland County | 14 | 1927 | Significant | Not Rated |
| West Dam Deer Lodge County | 100 | — | Significant | Satisfactory |
| West Alkali Reservoir Phillips County | 25 | 1902 | Significant | Not Rated |
| Wendall Willkie Judith Basin County | 15 | 1965 | Significant | Not Rated |
| Watters #1 Powder River County | 29 | 1966 | Significant | Not Rated |
| Wanken Toole County | 30 | 1928 | Significant | Not Rated |
| Walstom Pondera County | 10 | 1920 | Significant | Not Rated |
| Veseth Reservoir Phillips County | 30 | 1925 | Significant | Not Rated |
| Veseth Ann Veseth #2 Phillips County | 20 | 1944 | Significant | Not Rated |
| Venn #8 Custer County | 17 | 1970 | Significant | Not Rated |
| Venn #1 Custer County | 28 | 1936 | Significant | Not Rated |
| Vanette'S Dam Powder River County | 19 | 1912 | Significant | Not Rated |
| Van #2 Garfield County | 15 | 1940 | Significant | Not Rated |
| Upper Branham Madison County | 6 | 1980 | Significant | Not Rated |
| Tub Lake Dam Beaverhead County | 13 | 1904 | Significant | Not Rated |
| Torger Dam Petroleum County | 18 | 1976 | Significant | Not Rated |
| Thornton Lake Dam Deer Lodge County | 11 | 1904 | Significant | Not Rated |
| Tarum #2 Valley County | 18 | 1952 | Significant | Not Rated |
| Tailings Impoundment Madison County | 155 | — | Significant | Not Rated |
| Sweet Carolyn Valley County | 26 | 1958 | Significant | Not Rated |
| Supenau Lake Hill County | 40 | 1959 | Significant | Not Rated |
| Sunrise Lake Madison County | 14 | 1916 | Significant | Not Rated |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.