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 1126–1150 of 2,606
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lohman Hill County | 19 | 1905 | Low | Not Rated |
| Lockie #7 Custer County | 16 | 1961 | Low | Not Rated |
| Lockie #6 Custer County | 21 | 1975 | Low | Not Rated |
| Lockie #5 Custer County | 31 | 1961 | Low | Not Rated |
| Lockie #4 Custer County | 16 | 1950 | Low | Not Rated |
| Lockie #3 Custer County | 20 | 1960 | Low | Not Rated |
| Lockie #2 Custer County | 19 | 1956 | Low | Not Rated |
| Lockie #10 Custer County | 21 | 1955 | Low | Not Rated |
| Lockie #1 Custer County | 18 | 1942 | Low | Not Rated |
| Lobella Detention Dam Dawson County | 21 | 1956 | Low | Unsatisfactory |
| L Krutzfeldt #6 Custer County | 20 | 1975 | Low | Not Rated |
| L Krutzfeldt #5 Custer County | 32 | 1974 | Low | Not Rated |
| L Krutzfeldt #2 Custer County | 24 | 1957 | Low | Not Rated |
| L Krutzfeldt #1 Custer County | 27 | 1939 | Low | Not Rated |
| Little Warm Spring Creek Phillips County | 25 | 1938 | Low | Not Rated |
| Little Wall Musselshell County | 20 | 1930 | Low | Not Rated |
| Little Crooked Rudolph Fergus County | 20 | 1967 | Low | Unsatisfactory |
| Little Bunny Detention Dam Phillips County | 24 | 1967 | Low | Fair |
| Little Brazil #3 Valley County | 14 | 1948 | Low | Not Rated |
| Little Brazil Valley County | 16 | 1939 | Low | Not Rated |
| Little Boy Blue Carter County | 12 | 1919 | Low | Not Rated |
| Little Blue Dam Sanders County | 95 | 1954 | Low | Not Rated |
| Little Bear/Us #37 Dam Petroleum County | 17 | — | Low | Poor |
| Little Blaine County | 20 | 1930 | Low | Not Rated |
| Lisk Creek Dam McCone County | 33 | 1931 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.