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 1901–1925 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gordon Fergus County | 15 | 1959 | Low | Not Rated |
| Gordan Lightfoot Teton County | 25 | 1972 | Low | Not Rated |
| Good Ol West Chouteau County | 30 | 1960 | Low | Not Rated |
| Goodian, Howard Hill County | 20 | 1947 | Low | Not Rated |
| Goodale #2 Custer County | 20 | 1952 | Low | Not Rated |
| Good McCone County | 19 | 1950 | Low | Not Rated |
| Gollaher Reservoir Cascade County | 38 | 1945 | Significant | Not Rated |
| Gollaher #2 Cascade County | 18 | 1930 | Low | Not Rated |
| Golden Sunlight #2 Tailings Dam Jefferson County | — | — | High | Satisfactory |
| Golden Meadow Gallatin County | 24 | 1947 | Low | Not Rated |
| Golden Glenn #1 Carbon County | 40 | 1947 | Low | Not Rated |
| Golden Gate Dam Blaine County | 16 | — | Low | Not Rated |
| Golden Richland County | 30 | 1936 | Low | Not Rated |
| Goldberg West Dam Granite County | 15 | 1956 | Low | Not Available |
| Goldberg East Dam Granite County | 27 | 1956 | Low | Not Available |
| Goffena #4 Petroleum County | 20 | 1948 | Low | Not Rated |
| Goffena #2 Petroleum County | 21 | 1953 | Low | Not Rated |
| Goffena Musselshell County | 24 | 1986 | Significant | Not Rated |
| Gofara #8 Musselshell County | 12 | 1955 | Low | Not Rated |
| Gofara #7 Musselshell County | 8 | 1955 | Low | Not Rated |
| Gofara #6 Musselshell County | 12 | 1955 | Low | Not Rated |
| Gofara #3 Musselshell County | 11 | 1955 | Low | Not Rated |
| Godfather Chouteau County | 30 | 1900 | Low | Not Rated |
| G N R R Dunkirk Reservoir Toole County | 14 | 1889 | Significant | Not Rated |
| G Newman #6 Rosebud County | 15 | 1958 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.