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 2376–2400 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sands Lake East Dike Hill County | 6 | 1911 | Significant | Not Rated |
| Sands Lake North Dam Hill County | 11 | 1911 | Significant | Not Rated |
| Santa Maria Blaine County | 10 | 1959 | Low | Not Rated |
| Saskview Dam Valley County | 23 | 2003 | Low | Not Rated |
| Sassy Top Deck Hill County | 19 | 1938 | Low | Not Rated |
| Saucer #1 Prairie County | 15 | 1948 | Low | Not Rated |
| Saucer #2 Prairie County | 16 | 1962 | Low | Not Rated |
| Saucer #3 Prairie County | 20 | 1940 | Low | Not Rated |
| Saucer #4 Prairie County | 10 | 1964 | Low | Not Rated |
| Saucer #5 Prairie County | 20 | 1940 | Low | Not Rated |
| Saucer #6 Prairie County | 18 | 1944 | Low | Not Rated |
| Savage Fallon County | 20 | 1960 | Low | Not Rated |
| Saylor Garfield County | 20 | 1954 | Low | Not Rated |
| Saylor Reservoir Garfield County | 22 | 1965 | Low | Not Rated |
| Schaffer #1 Powder River County | 21 | 1961 | Low | Not Rated |
| Scheffer (Missoula) Missoula County | 15 | 1948 | Low | Not Rated |
| Schessler #10 Rosebud County | 18 | 1967 | Low | Not Rated |
| Schiffer #6 Rosebud County | 15 | 1954 | Low | Not Rated |
| Schindal Battle I Meagher County | 17 | 1920 | Low | Not Rated |
| Schlemmer #1 Carbon County | 14 | 1950 | Low | Not Rated |
| Schlenker Retention Dam Prairie County | 20 | 2003 | Low | Not Rated |
| Schlesinger #1 Rosebud County | 20 | 1946 | Low | Not Rated |
| Schlesinger #2 Rosebud County | 22 | 1954 | Low | Not Rated |
| Schlesinger #3 Rosebud County | 12 | 1961 | Low | Not Rated |
| Schlesinger #4 Rosebud County | 15 | 1962 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.