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 2526–2550 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| White Silver Silver Bow County | 15 | 1950 | Low | Not Rated |
| White Sulphur Springs Sewage Disposal Meagher County | 8 | 1960 | Low | Not Rated |
| Whitetail Rosebud County | 18 | 1961 | Low | Not Rated |
| Whitetail (Custer) Custer County | 20 | 1952 | Low | Not Rated |
| Whitetail (Daniels) Daniels County | 21 | 1930 | Low | Not Rated |
| Whitetail Detention Dam Carter County | 20 | 1966 | Low | Poor |
| Whitetail Detention Dam Valley County | 29 | 1965 | Low | Poor |
| Whitetail (Meagher) Meagher County | 30 | 1961 | Low | Not Rated |
| Whiton #2 Powder River County | 37 | 1942 | Low | Not Rated |
| Wicker Basket #1 Fergus County | 23 | 1965 | Low | Not Rated |
| Wicker Basket #2 Fergus County | 30 | 1962 | Low | Not Rated |
| Widgeon Pond Dam Beaverhead County | 12 | 1964 | Low | Poor |
| Widower Pondera County | 18 | 1954 | Low | Not Rated |
| Wiederrick Phillips County | 14 | 1947 | Low | Not Rated |
| Wiggins #2 Petroleum County | 12 | 1955 | Low | Not Rated |
| Wiggins #3 Petroleum County | 19 | 1967 | Low | Not Rated |
| Wilde Roosevelt County | 20 | 1942 | Low | Not Rated |
| Wild Flower Musselshell County | 30 | 1966 | Low | Not Rated |
| Wild Horse Dam Pd Phillips County | 19 | — | Low | Not Rated |
| Wildhorse Pasture Rosebud County | 20 | 1970 | Low | Not Rated |
| Wilke Dam Phillips County | 16 | 1912 | Low | Not Rated |
| Williams Coulee #2 Petroleum County | 18 | 1951 | Low | Not Rated |
| Willie Nelson Hill County | 10 | 1954 | Low | Not Rated |
| Willmore Fergus County | 15 | 1946 | Low | Not Rated |
| Willough McCone County | 24 | 1952 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.