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 2351–2375 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Russiff #1 Powder River County | 11 | 1950 | Low | Not Rated |
| Russiff #2 Powder River County | 21 | 1960 | Low | Not Rated |
| Rusty Bandalero Hill County | 8 | 1939 | Low | Not Rated |
| Ryan Cascade County | 82 | 1915 | High | Satisfactory |
| Ryan (Garfield) Garfield County | 20 | 1968 | Low | Not Rated |
| Ryan-Tronrud Dam Sweet Grass County | 22 | 1956 | Significant | Not Rated |
| Sagebrush #2 Phillips County | 30 | 1967 | Low | Not Rated |
| Sagebrush #3 Fergus County | 20 | 1958 | Low | Not Rated |
| Sagittaurius Toole County | 12 | 1945 | Low | Not Rated |
| Saint Marys Diversion Dam Glacier County | 29 | 1915 | Low | Not Available |
| Salsbury (Richland) Richland County | 24 | 1965 | Significant | Not Rated |
| Sam Blaine County | 12 | 1960 | Low | Not Rated |
| Samantha Hill County | 25 | 1955 | Low | Not Rated |
| Sambo #1 Dam Phillips County | 17 | — | Low | Not Rated |
| Sample Flats Dam Chouteau County | 14 | — | Low | Not Rated |
| Sams #1 Powder River County | 22 | 1944 | Low | Not Rated |
| Sanburn Reservoir Powder River County | 31 | 1961 | Low | Not Rated |
| Sand #1 Rosebud County | 15 | 1955 | Low | Not Rated |
| Sand #2 Rosebud County | 15 | 1973 | Low | Not Rated |
| Sand Cow Garfield County | 12 | 1960 | Low | Not Rated |
| Sand Creek Du Dam Beaverhead County | 9 | 1999 | Low | Fair |
| Sand Dollars Cascade County | 20 | 1960 | Low | Not Rated |
| Sanders Lake Dam #1 North Missoula County | 10 | 1913 | Significant | Not Rated |
| Sandman #1 Petroleum County | 20 | 1960 | Low | Not Rated |
| Sand Rock Carter County | 27 | 1937 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.