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 1276–1300 of 2,990
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hingham Sandy Sage Hill County | 15 | 1920 | Low | Not Rated |
| Hinman Dam Lewis and Clark County | 34 | 2000 | High | Not Rated |
| Hintz McCone County | 16 | 1945 | Low | Not Rated |
| Hirsch #1 Custer County | 23 | 1950 | Low | Not Rated |
| Hirschy Beaverhead County | 30 | 1967 | Low | Not Rated |
| H M Scott #1 Custer County | 27 | 1950 | Low | Not Rated |
| H M Scott #2 Custer County | 19 | 1963 | Low | Not Rated |
| Hofer 1 Liberty County | 22 | 1977 | Low | Not Rated |
| Hofer 2 Toole County | 22 | 1977 | Low | Not Rated |
| Hogan #2 Custer County | 15 | 1960 | Low | Not Rated |
| Hollandsworth Liberty County | 30 | 1946 | Low | Not Rated |
| Hollar Wibaux County | 30 | 1949 | Low | Not Rated |
| Hollecker Dawson County | 24 | 1964 | Low | Not Rated |
| Holliday -Flagstaff Lake- Meagher County | 38 | 1939 | Low | Not Rated |
| Holloway Lake Ravalli County | 20 | 1900 | Low | Not Rated |
| Holly Sugar, Lower Richland County | 10 | 1929 | Low | Not Rated |
| Holter Dam Lewis and Clark County | 124 | 1918 | High | Satisfactory |
| Holzhey Sweet Grass County | 21 | 1956 | Low | Not Rated |
| Homer #1 Carter County | 12 | 1951 | Low | Not Rated |
| Homestead Dam Roosevelt County | 14 | 1953 | Low | Poor |
| Homesteaders Settlement Chouteau County | 30 | 1960 | Significant | Not Rated |
| Homestead Retention Dam Prairie County | 21 | 1964 | Low | Unsatisfactory |
| Hook #10 Rosebud County | 18 | 1941 | Low | Not Rated |
| Hook #12 Rosebud County | 14 | 1956 | Low | Not Rated |
| Hook #15 Rosebud County | 15 | 1953 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.