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 826–850 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| 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 |
| Pn Grazing Association #1 Fergus County | 15 | 1953 | Low | Not Rated |
| Pluto Chouteau County | 16 | 1950 | Low | Not Rated |
| Plunket Lake Broadwater County | 20 | 1920 | Low | Not Rated |
| Pluhar #2 Garfield County | 15 | 1962 | Low | Not Rated |
| Pluhar #1 Garfield County | 25 | 1946 | Low | Not Rated |
| Plethora Phillips County | 12 | 1965 | Low | Not Rated |
| Plentywood Sewage Lagoon Sheridan County | 9 | 1954 | Low | Not Rated |
| Pishkun Dike 5 Teton County | 11 | 1931 | High | Not Available |
| Pirate Dam Chouteau County | 60 | 1982 | Significant | Not Rated |
| Pippen Valley County | 12 | 1925 | Low | Not Rated |
| Pipe Organ Du Dam Beaverhead County | 8 | 2003 | Low | Satisfactory |
| Pioneer Sweet Grass County | 25 | 1968 | Low | Not Rated |
| Pintail Dam Carter County | 22 | 2003 | Low | Not Rated |
| Pink Skeeter #2 Garfield County | 12 | 1965 | Low | Not Rated |
| Pink Skeeter #1 Garfield County | 12 | 1965 | Low | Not Rated |
| Pines Dam Valley County | 20 | — | Low | Unsatisfactory |
| Pine Hills Custer County | 27 | 1950 | Low | Not Rated |
| Pilster Diversion One Dam Carter County | 14 | 1960 | Low | Fair |
| Pike Creek Dam Fergus County | 81 | 1977 | High | Satisfactory |
| Picard Reservoir Roosevelt County | 10 | 1937 | Low | Not Rated |
| Picard Roosevelt County | 20 | 1945 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.