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 126–150 of 193
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gravelly Range Lake Lewis and Clark County | 12 | 1964 | Significant | Not Rated |
| Gollaher Reservoir Cascade County | 38 | 1945 | Significant | Not Rated |
| Goffena Musselshell County | 24 | 1986 | Significant | Not Rated |
| G N R R Dunkirk Reservoir Toole County | 14 | 1889 | Significant | Not Rated |
| Glacier Lake Dam Missoula County | 12 | 1915 | Significant | Not Rated |
| Giacometto #1 Powder River County | 38 | 1953 | Significant | Not Rated |
| Gerald Kane Blaine County | 39 | 1965 | Significant | Not Rated |
| Frenchman Ir. Company #1 Phillips County | 10 | 1951 | Significant | Not Rated |
| Frenchman Dam Phillips County | 63 | 1953 | Significant | Not Rated |
| Fowl Mouth Pondera County | 30 | 1950 | Significant | Not Rated |
| Fowler Dam #2 (Pondera) Pondera County | 12 | 1950 | Significant | Not Rated |
| Folkoord Richland County | 30 | 1959 | Significant | Not Rated |
| Fly Swatter #1 Carter County | 15 | 1920 | Significant | Not Rated |
| Flathead County Stormwater Retention Pond Flathead County | — | 1999 | Significant | Not Rated |
| Fish (Fergus) Fergus County | 30 | 1963 | Significant | Not Rated |
| Fifty Dollar Bill Meagher County | 20 | 1960 | Significant | Not Rated |
| Faber Cattle Blaine County | 42 | 1930 | Significant | Not Rated |
| Eureka Holding Pond Dike Lincoln County | 40 | 1982 | Significant | Not Rated |
| Ester Lake (Phillips) Phillips County | 17 | 1954 | Significant | Not Rated |
| Elderly Dam Fergus County | 40 | 1975 | Significant | Not Rated |
| East Dam Deer Lodge County | 80 | — | Significant | Satisfactory |
| East Blacktail Rosebud County | 25 | 1952 | Significant | Not Rated |
| Dye #1 Carter County | 24 | 1918 | Significant | Not Rated |
| Dry Fork Blaine County | 45 | 1986 | Significant | Not Rated |
| Drga Dam Chouteau County | 30 | 1938 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.