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 1926–1950 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Primrose Sheridan County | 35 | 1941 | Low | Not Rated |
| Private Reservoir Phillips County | 30 | 1935 | Low | Not Rated |
| Procyon Liberty County | 12 | 1950 | Low | Not Rated |
| Professor Pool Valley County | 20 | 1950 | Low | Not Rated |
| Pryor Land #1 Big Horn County | 20 | 1965 | Low | Not Rated |
| Puppie Tail Fergus County | 32 | 1963 | Low | Not Rated |
| Purple Water Liberty County | 20 | 1916 | Low | Not Rated |
| Put It Together Garfield County | 25 | 1964 | Low | Not Rated |
| Qalqiliya Blaine County | 30 | 1965 | Low | Not Rated |
| Quaker Dawson County | 8 | 1947 | Low | Not Rated |
| Quell #1 Rosebud County | 12 | 1949 | Low | Not Rated |
| Quick, Floyd #1 McCone County | 27 | 1937 | Low | Not Rated |
| Quick, Floyd #2 McCone County | 15 | 1968 | Low | Not Rated |
| Quick (L.) McCone County | 30 | 1968 | Low | Not Rated |
| Rader, Rodger Meagher County | 20 | 1957 | Low | Not Rated |
| Rafferty #2 Custer County | 15 | 1955 | Low | Not Rated |
| Rafferty #3 Custer County | 25 | 1939 | Low | Not Rated |
| Rafferty #4 Custer County | 24 | 1957 | Low | Not Rated |
| Rafferty #5 Custer County | 20 | 1960 | Low | Not Rated |
| Raglands #1 Big Horn County | 20 | 1945 | Low | Not Rated |
| Raise #1 Dawson County | 24 | 1942 | Low | Not Rated |
| Ralph Clark #1 Garfield County | 47 | 1955 | Low | Not Rated |
| Ramcharger Glacier County | 17 | 1950 | Low | Not Rated |
| Randi Phillips County | 15 | 1955 | Low | Not Rated |
| Rattlesnake #2 Wibaux County | 15 | 1965 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.