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 901–925 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Fillenworth #3 McCone County | 17 | 1948 | Low | Not Rated |
| Fillenworth Reservoir #1 McCone County | 17 | 1938 | Low | Not Rated |
| Finale Detention Dam Valley County | 34 | 1965 | Low | Poor |
| Fink #2 Fergus County | 10 | 1957 | Low | Not Rated |
| Fink Reservoir Fergus County | 25 | 1969 | Low | Not Rated |
| Fish Beaverhead County | 24 | 1956 | Low | Not Available |
| Fisher Valley County | 20 | 1979 | Low | Not Rated |
| Fisher Dam Valley County | 34 | 1978 | Low | Not Rated |
| Fisherman George Chouteau County | 25 | 1915 | Low | Not Rated |
| Fisher Reservoir Garfield County | 16 | 1960 | Low | Not Rated |
| Fish (Fergus) Fergus County | 30 | 1963 | Significant | Not Rated |
| Fish Lake Ravalli County | 26 | 1927 | Low | Not Rated |
| Fish Lake (Pondera) Pondera County | 25 | 1960 | Low | Not Rated |
| Fiske McCone County | 30 | 1950 | Low | Not Rated |
| Flathead County Stormwater Retention Pond Flathead County | — | 1999 | Significant | Not Rated |
| Flat Milford Colony Lewis and Clark County | 15 | 1955 | Low | Not Rated |
| Flat Retention Dam / Mister Bill Dam Phillips County | 16 | 1973 | Low | Unsatisfactory |
| Flecher Reservoir Richland County | 20 | 1967 | Low | Not Rated |
| Fleming Dawson County | 14 | 1962 | Low | Not Rated |
| Fleming #2 Rosebud County | 15 | 1960 | Low | Not Rated |
| Flesch #2 Toole County | 15 | 1966 | Low | Not Rated |
| Flicked Bic Cascade County | 12 | 1960 | Low | Not Rated |
| Floating Rib Pondera County | 20 | 1920 | Low | Not Rated |
| Floodly Garfield County | 12 | 1940 | Low | Not Rated |
| Flower Creek Dam Lincoln County | 59 | 2016 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.