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 26–50 of 193
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Cornwell Valley County | 23 | 1952 | Significant | Not Rated |
| Cow Creek Blaine County | 43 | — | Significant | Not Rated |
| Cracker Pondera County | 35 | 1915 | Significant | Not Rated |
| Crazy Sombreo Meagher County | 58 | 1950 | Significant | Not Rated |
| Crow #2 McCone County | 30 | 1973 | Significant | Not Rated |
| Curry Dam Pondera County | 27 | — | Significant | Not Rated |
| Dailey Lake Park County | 10 | 1945 | Significant | Not Rated |
| Davis Creek Dam Powell County | 38 | 1960 | Significant | Not Rated |
| Deadmans Basin Water Supply Canal Storage Reservoir #5 Wheatland County | 30 | — | Significant | Not Rated |
| Deerhead Lake Dam Beaverhead County | 13 | 1929 | Significant | Not Rated |
| Delaney Richland County | 16 | 1961 | Significant | Not Rated |
| Delilah Chouteau County | 10 | 1960 | Significant | Not Rated |
| Ding Dong Carter County | 30 | 1955 | Significant | Not Available |
| Dog Creek Reservoir Powell County | 33 | 1954 | Significant | Not Rated |
| Donald Sweet Grass County | 20 | 1963 | Significant | Not Rated |
| Double N Ranch Lincoln County | 16 | 1965 | Significant | Not Rated |
| Douglas Creek Tailings Dam Granite County | 60 | — | Significant | Not Rated |
| Dreves Yellowstone County | 39 | 1938 | Significant | Not Rated |
| Drga Dam Chouteau County | 30 | 1938 | Significant | Not Rated |
| Dry Fork Blaine County | 45 | 1986 | Significant | Not Rated |
| Dye #1 Carter County | 24 | 1918 | Significant | Not Rated |
| East Blacktail Rosebud County | 25 | 1952 | Significant | Not Rated |
| East Dam Deer Lodge County | 80 | — | Significant | Satisfactory |
| Elderly Dam Fergus County | 40 | 1975 | Significant | Not Rated |
| Ester Lake (Phillips) Phillips County | 17 | 1954 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.