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 1826–1850 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Parsell Liberty County | 30 | 1975 | Low | Not Rated |
| Parsell, W. Liberty County | 20 | 1962 | Low | Not Rated |
| Pasma, J. Hill County | 20 | 1948 | Low | Not Rated |
| Paul Huber McCone County | 26 | 1941 | Low | Not Rated |
| Paulo Dam Valley County | 10 | 2003 | Low | Not Rated |
| Pawlowski Reservoir McCone County | 20 | 1950 | Low | Not Rated |
| Payton #1 Prairie County | 30 | 1956 | Low | Not Rated |
| Payton #2 Prairie County | 30 | 1954 | Low | Not Rated |
| Payton Place Cascade County | 20 | 1965 | Low | Not Rated |
| Pcb Daniels County | 20 | 1950 | Low | Not Rated |
| Pea Ridge #1 Dam Phillips County | 20 | — | Low | Not Rated |
| Peephole Chouteau County | 10 | 1938 | Low | Not Rated |
| Peer #1 Richland County | 15 | 1937 | Low | Not Rated |
| Pegar Fish Chouteau County | 32 | 1966 | Low | Not Rated |
| Peigneux Phillips County | 10 | 1960 | Low | Not Rated |
| Peila #1 Custer County | 20 | 1945 | Low | Not Rated |
| Penzer Dam Chouteau County | 10 | 1960 | Low | Not Rated |
| Pepper Park County | 20 | 1954 | Low | Not Rated |
| Pepper #1 Park County | 30 | 1953 | Low | Not Rated |
| Pepper #2 Park County | 30 | 1954 | Low | Not Rated |
| Perigee Hill County | 15 | 1935 | Low | Not Rated |
| Peru Beaverhead County | 10 | 1943 | Low | Not Rated |
| Pete Carter County | 15 | 1939 | Low | Not Rated |
| Peters #2 Fergus County | 24 | 1961 | Low | Not Rated |
| Petersen Dam Sheridan County | 14 | 1939 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.