Browse Dams
3,029 dams in the National Inventory of Dams.
National Inventory of Dams
Browse 3,029 dams from the NID database. Each record includes dam name, location, physical dimensions, hazard potential classification, condition assessment, purpose, owner information, and emergency action plan status. Use the filters below to search by state, hazard level, condition, or keyword.
| Name | State | County | Height (ft) | Hazard | Condition | Year | Purpose |
|---|---|---|---|---|---|---|---|
| Threemile Storage West Dike | Montana | Blaine | 8 | Low | Not Rated | - | Irrigation |
| Famolare | Montana | Liberty | 7 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Wagner | Montana | Valley | 7 | Low | - | 1962 | Irrigation |
| Maddox Ranch Corporation #1 | Montana | Blaine | 7 | Low | - | 1960 | Water Supply |
| R Owen #2 | Montana | Carter | 7 | Low | - | 1920 | Fire Protection, Stock, Or ... |
| Eddie #6 | Montana | Valley | 7 | Low | - | 1970 | Fire Protection, Stock, Or ... |
| Aster | Montana | Toole | 7 | Low | - | 1920 | Irrigation |
| Mckinley Lake (Deleted) | Montana | Missoula | 7 | Significant | - | 1923 | Water Supply |
| Montana #13 | Montana | Rosebud | 7 | Low | - | 1958 | Fire Protection, Stock, Or ... |
| J Jacobsen #2 | Montana | Daniels | 7 | Low | - | 1969 | Flood Risk Reduction |
| Rockport Colony #1 | Montana | Teton | 7 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Big Sky Lake Dam (Missoula) | Montana | Missoula | 7 | Significant | - | - | Recreation |
| Sparrow Pond Dam | Montana | Beaverhead | 7 | Low | Poor | 1965 | Fish and Wildlife Pond |
| Ninepipe Dike 2 | Montana | Lake | 7 | Undetermined | Fair | 1911 | Irrigation |
| Ninepipe Dike 1 | Montana | Lake | 7 | Undetermined | Fair | 1911 | Irrigation |
| Sands Lake East Dike | Montana | Hill | 6 | Significant | - | 1911 | Irrigation |
| Upper Branham | Montana | Madison | 6 | Significant | Not Rated | 1980 | Recreation |
| Kicking Horse Dike #2 | Montana | Lake | 6 | Undetermined | Unsatisfactory | 1930 | Irrigation |
| Kicking Horse Dike #3 | Montana | Lake | 6 | Undetermined | Unsatisfactory | 1930 | Irrigation |
| Pablo North Dike | Montana | Lake | 5 | High | Unsatisfactory | 1912 | Irrigation |
| Willow Creek BOR MT-Dike 4 | Montana | Lewis and Clark | 5 | High | Not Available | 1941 | Irrigation |
| Willow Creek BOR MT-Dike 2 | Montana | Lewis and Clark | 4 | High | Not Available | 1941 | Irrigation |
| Willow Creek BOR MT-Dike 3 | Montana | Lewis and Clark | 3 | High | Not Available | 1941 | |
| Stillwater Nye Tailings Dam | Montana | Stillwater | 0 | High | Satisfactory | - | Tailings |
| Stillwater Hertzler Tailings Dam | Montana | Stillwater | 0 | High | Satisfactory | - | Tailings |
| Mt Tunnels Tailings Dam | Montana | Jefferson | 0 | High | Satisfactory | - | Tailings |
| Golden Sunlight #2 Tailings Dam | Montana | Jefferson | 0 | High | Satisfactory | - | Tailings |
| East Boulder Tailings Dam | Montana | Sweet Grass | 0 | High | Satisfactory | - | Tailings |
| Flathead County Stormwater Retention Pond | Montana | Flathead | 0 | Significant | - | 1999 | Flood Risk Reduction |
Frequently Asked Questions
Hazard potential is based on the consequences of dam failure, not the condition of the dam. High hazard means loss of human life is probable. Significant means economic and environmental losses are expected but no probable loss of life. Low means minimal losses are expected. The classification considers downstream population, infrastructure, and environmental resources.
Condition ratings reflect the physical state of the dam based on periodic inspections. Satisfactory means no deficiencies found. Fair means minor issues exist but no immediate action needed. Poor means safety deficiencies require remedial action. Unsatisfactory means the dam is unsafe and immediate corrective action is required.
Yes. Use the search field above to find dams by name. You can also combine the search with state, hazard, and condition filters to narrow your results. Each dam record links to a detail page with complete information.