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 1826–1850 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Field #1 Garfield County | 20 | 1939 | Low | Not Rated |
| Ferris Farms Teton County | 20 | 1949 | Low | Not Rated |
| Fergus County #1 Fergus County | 25 | — | Low | Not Rated |
| Fergus #1 Fergus County | 15 | 1939 | Low | Not Rated |
| Fender Bender Toole County | 15 | 1930 | Low | Not Rated |
| Felt Coulee Dam Petroleum County | 19 | 1971 | Low | Not Rated |
| Fellman Garfield County | 30 | 1972 | Low | Not Rated |
| F Downs #1 Yellowstone County | 12 | 1950 | Low | Not Rated |
| Fatzinger #2 Richland County | 21 | 1965 | Low | Not Rated |
| Fatzinger Dawson County | 20 | 1937 | Low | Not Rated |
| Farmers Coop Canal Co Teton County | 34 | 1940 | Low | Not Rated |
| Farleys #1 Rosebud County | 20 | 1940 | Low | Not Rated |
| Fannon #2 Garfield County | 25 | 1939 | Low | Not Rated |
| Fannon #1 Garfield County | 30 | 1938 | Low | Not Rated |
| Famolare Liberty County | 7 | 1960 | Low | Not Rated |
| Failings #5 Custer County | 18 | 1963 | Low | Not Rated |
| Failing #4 Custer County | 20 | 1963 | Low | Not Rated |
| Failing #3 Custer County | 24 | 1948 | Low | Not Rated |
| E Wasson #2 Phillips County | 20 | 1947 | Low | Not Rated |
| E Wasson #1 Phillips County | 25 | 1948 | Low | Not Rated |
| Evans, L. Lewis and Clark County | 20 | 1961 | Low | Not Rated |
| Eva Murphy #4 Fergus County | 20 | 1960 | Low | Not Rated |
| Eva Murphy #1 Fergus County | 16 | 1940 | Low | Not Rated |
| Eugene S #1 McCone County | 15 | 1945 | Low | Not Rated |
| Essinger Reservoir McCone County | 15 | 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.