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 701–725 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pr-11 Retention Dam Phillips County | 17 | 1942 | Low | Not Rated |
| Pr-110 Retention Dam Phillips County | 21 | 1936 | Low | Not Rated |
| Pozega Lake 3 Granite County | 9 | 1958 | Low | Not Available |
| Pozega Lake 2 Granite County | 12 | 1955 | Low | Not Available |
| Pozega Lake 1 Granite County | 21 | 1958 | Low | Not Available |
| Powell #2 (Blaine) Blaine County | 10 | 1935 | Low | Not Rated |
| Powell #2 Custer County | 17 | 1963 | Low | Not Rated |
| Powell #1 (Blaine) Blaine County | 10 | 1930 | Low | Not Rated |
| Powell #1 Custer County | 24 | 1966 | Low | Not Rated |
| Potter (Toole) Toole County | 12 | 1880 | Low | Not Rated |
| Potter Irrigation (Broadwater) Broadwater County | 28 | 1953 | Low | Not Rated |
| Portwine #1 Powder River County | 25 | 1934 | Low | Not Rated |
| Porta Custer County | 27 | 1954 | Low | Not Rated |
| Porrini Lewis and Clark County | 10 | 1952 | Low | Not Rated |
| Porcupine (Rosebud) Rosebud County | 28 | 1968 | Low | Not Rated |
| Porch #1 Powder River County | 29 | 1961 | Low | Not Rated |
| Pony Dam Musselshell County | 15 | 1936 | Low | Not Rated |
| Pond R1 Big Horn County | 40 | 1989 | Low | Not Rated |
| Pond No. 11 Rosebud County | 22 | 1980 | Low | Not Rated |
| Pond No. 10 Rosebud County | 31 | 1980 | Low | Not Rated |
| Ponderosa Pine Pondera County | 20 | 1968 | Low | Not Rated |
| Pollux Chouteau County | 25 | 1960 | Low | Not Rated |
| Pollocks Jh Valley of The Moon Missoula County | 25 | 1960 | Low | Not Rated |
| Pollington Coulee Hill County | 15 | 1957 | Low | Not Rated |
| Polar Bear Reservoir Blaine County | 20 | 1950 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.