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 2526–2550 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Spartan/Playfair Park Retention Basins Missoula County | 8 | 2003 | High | Satisfactory |
| Spear #1 Powder River County | 15 | 1954 | Low | Not Rated |
| Spica Chouteau County | 12 | 1952 | Low | Not Rated |
| Spider One Blaine County | 10 | 1965 | Low | Not Rated |
| Split Garfield County | 16 | 1952 | Low | Not Rated |
| Sportman Dam Richland County | 12 | 1959 | Low | Not Rated |
| Sportsman Fallon County | 28 | 1955 | Significant | Not Rated |
| Spring Creek Missoula County | 15 | 1951 | Significant | Not Rated |
| Spring Creek Irrigation (Fergus) Fergus County | 18 | 1964 | Low | Not Rated |
| Spring Creek Lake (Cascade) Cascade County | 25 | 1930 | Low | Not Rated |
| Spring Creek (Meagher) Meagher County | 30 | 1949 | Low | Not Rated |
| Springdale Meagher County | 20 | 1932 | Low | Not Rated |
| Springdale #3 Meagher County | 10 | 1962 | Low | Not Rated |
| Springdale #4 Meagher County | 26 | 1938 | Low | Not Rated |
| Springdale Colony Meagher County | 30 | 1941 | Low | Not Rated |
| Spring-Miller Garfield County | 25 | 1958 | Low | Not Rated |
| Springtime #1 Stillwater County | 12 | 1971 | Low | Not Rated |
| Spun Cascade County | 15 | 1960 | Significant | Not Rated |
| Square Butte Detention Dam Phillips County | 42 | 1967 | Low | Poor |
| Squiggles #1 Chouteau County | 25 | 1965 | Low | Not Rated |
| Squiggles #2 Chouteau County | 15 | 1965 | Low | Not Rated |
| S&S Kurth #1 Yellowstone County | 35 | 1940 | Low | Not Rated |
| Staff #1 Blaine County | 10 | 1910 | Significant | Not Rated |
| Staff #2 Blaine County | 30 | 1914 | Low | Not Rated |
| Standish #1 Rosebud County | 18 | 1955 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.