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 126–150 of 193
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Peebles Hill County | 8 | 1970 | Significant | Not Rated |
| Peet Creek Dam Beaverhead County | 43 | — | Significant | Not Rated |
| Penny Carter County | 24 | 1950 | Significant | Not Rated |
| Peterson Reservoir (Rosebud) Rosebud County | 25 | 1937 | Significant | Not Rated |
| Pfaff Irrigation Prairie County | 28 | 1957 | Significant | Not Rated |
| Phantom Coulee Reservoir Chouteau County | 25 | 1906 | Significant | Not Rated |
| Phillippi #1 Carter County | 20 | 1952 | Significant | Not Rated |
| Pirate Dam Chouteau County | 60 | 1982 | Significant | Not Rated |
| Polson Sewage Lagoon Lake County | 8 | 1963 | Significant | Not Rated |
| Porta Reservoir No. 2 Roosevelt County | 22 | 1963 | Significant | Not Rated |
| Prevost #2 Richland County | 18 | 1943 | Significant | Not Rated |
| Pyba Reservoir Garfield County | 28 | 1952 | Significant | Not Rated |
| Rain Dancer Hill County | 18 | 1916 | Significant | Not Rated |
| Raymond Storage (Sheridan) Sheridan County | 14 | 1930 | Significant | Not Rated |
| Red Fergus County | 30 | 1963 | Significant | Not Rated |
| Retriever #1 Yellowstone County | 8 | 1950 | Significant | Not Rated |
| Rieger Fallon County | 21 | 1958 | Significant | Not Rated |
| R Myhre #1 Fallon County | 15 | 1945 | Significant | Not Rated |
| Robbie Sweet Grass County | 25 | 1977 | Significant | Not Rated |
| Robin Hood #2 Meagher County | 30 | 1960 | Significant | Not Rated |
| Rock Creek Lake Powell County | 30 | 1960 | Significant | Not Rated |
| Rocky Crossing Reservoir Chouteau County | 12 | 1950 | Significant | Not Rated |
| Romain Liberty County | 15 | 1936 | Significant | Not Rated |
| Roth #2 Phillips County | 15 | 1947 | Significant | Not Rated |
| Ryan-Tronrud Dam Sweet Grass County | 22 | 1956 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.