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 2626–2650 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Brooks Garfield County | 18 | 1970 | Low | Not Rated |
| Bronze Garfield County | 15 | 1950 | Low | Not Rated |
| Broadwater Dam Broadwater County | 50 | 1940 | High | Satisfactory |
| Brinkman Blaine County | 12 | 1959 | Low | Not Rated |
| Brewer #3 Custer County | 28 | 1950 | Low | Not Rated |
| Brewer #2 Custer County | 15 | 1955 | Low | Not Rated |
| B'Rer Rabbit Blaine County | 15 | 1960 | Low | Not Rated |
| Brave Warrior Dam Blaine County | 8 | — | Low | Not Rated |
| Bramlette Chouteau County | 20 | 1930 | Low | Not Rated |
| Brain Dawson County | 20 | 1948 | Low | Not Rated |
| Bragg #1 Garfield County | 20 | 1920 | Low | Not Rated |
| Brady Lakes (Eyraud Lakes) Toole County | 20 | 1936 | Low | Not Rated |
| Brady Lakes #4 Teton County | 8 | 1930 | Low | Not Rated |
| Brady #4 Petroleum County | 20 | 1945 | Low | Not Rated |
| Brady #2 Petroleum County | 16 | 1967 | Low | Not Rated |
| Br-8 Retention Dam Blaine County | 12 | 1936 | Low | Not Rated |
| Br-57 Blaine County | 18 | 1942 | Low | Not Rated |
| Br-55 Retention Dam Blaine County | 16 | 1937 | Low | Not Rated |
| Br-52 Retention Dam Blaine County | 19 | 1937 | Low | Not Rated |
| Br-45 Retention Dam Blaine County | 17 | 1937 | Low | Not Rated |
| Br-43 Retention Dam Blaine County | 21 | 1936 | Low | Not Rated |
| Br-22 Retention Dam Blaine County | 15 | 1936 | Low | Not Rated |
| Br-12 Retention Dam Blaine County | 23 | 1936 | High | Satisfactory |
| Bozo Phillips County | 20 | 1945 | Low | Not Rated |
| Box Office Hill County | 16 | 1950 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.