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 |
|---|---|---|---|---|---|---|---|
| Faber Cattle | Montana | Blaine | 42 | Significant | — | 1930 | Fire Protection, Stock, Or ... |
| Depression Detention Dam | Montana | Carbon | 42 | High | Poor | 1968 | Flood Risk Reduction |
| Spaniard | Montana | Cascade | 42 | Low | — | 1962 | Irrigation |
| Vananda | Montana | Rosebud | 42 | Low | — | 1936 | Irrigation |
| Burnt Fork Dam | Montana | Ravalli | 42 | High | Not Rated | 1902 | Irrigation |
| Square Butte Detention Dam | Montana | Phillips | 42 | Low | Poor | 1967 | Flood Risk Reduction |
| Anita Dam | Montana | Blaine | 42 | High | Fair | 1995 | Irrigation |
| Lark Detention Dam | Montana | Phillips | 41 | Low | Fair | 1968 | Flood Risk Reduction |
| Ninepipe | Montana | Lake | 41 | High | Fair | 1911 | Irrigation |
| Collins Detention Reservoir | Montana | Valley | 41 | Low | — | 1957 | Fire Protection, Stock, Or ... |
| Black Eagle | Montana | Cascade | 41 | High | Poor | 1891 | Hydroelectric |
| Gay #2 | Montana | Powder River | 40 | Low | — | 1948 | Fire Protection, Stock, Or ... |
| Upper Dry Fork | Montana | Sanders | 40 | High | Unsatisfactory | 1940 | Irrigation |
| Dry Blood Creek Dam | Montana | Petroleum | 40 | High | Fair | 1964 | Flood Risk Reduction |
| Olson, Oscar (Meagher) | Montana | Meagher | 40 | High | Satisfactory | 1959 | Irrigation |
| Hankins #1 | Montana | Chouteau | 40 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Supenau Lake | Montana | Hill | 40 | Significant | — | 1959 | Fire Protection, Stock, Or ... |
| Pond R1 | Montana | Big Horn | 40 | Low | — | 1989 | Other |
| Willow Creek Dike 2 | Montana | Big Horn | 40 | Undetermined | Fair | 1941 | Irrigation |
| Swift (Prairie) | Montana | Prairie | 40 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Stone Ranch Dam | Montana | Fergus | 40 | Low | — | 2001 | Fish and Wildlife Pond |
| Golden Glenn #1 | Montana | Carbon | 40 | Low | — | 1947 | Irrigation |
| Elderly Dam | Montana | Fergus | 40 | Significant | — | 1975 | Fire Protection, Stock, Or ... |
| Eureka Holding Pond Dike | Montana | Lincoln | 40 | Significant | — | 1982 | Other |
| Madison Dam | Montana | Madison | 39 | High | Satisfactory | 1907 | Hydroelectric |
| Dreves | Montana | Yellowstone | 39 | Significant | — | 1938 | Fire Protection, Stock, Or ... |
| Gerald Kane | Montana | Blaine | 39 | Significant | — | 1965 | Irrigation |
| Graber #2 | Montana | Fergus | 39 | Low | — | 1958 | Fire Protection, Stock, Or ... |
| Mcnab Dam | Montana | Valley | 39 | Low | Unsatisfactory | 2003 | |
| Cottonwood Dam (Park) | Montana | Park | 39 | High | Poor | 1953 | Irrigation |
| Marstaeller Irrigation Dam | Montana | Sweet Grass | 39 | Low | — | 1984 | Irrigation |
| Moving'Along | Montana | Teton | 38 | Low | — | 1948 | Irrigation |
| Prescott | Montana | Hill | 38 | Low | — | 1901 | Fire Protection, Stock, Or ... |
| Giacometto #1 | Montana | Powder River | 38 | Significant | — | 1953 | Fire Protection, Stock, Or ... |
| Donley Reservoir (Rosebud) | Montana | Rosebud | 38 | Low | — | 1930 | Fire Protection, Stock, Or ... |
| Sugar | Montana | Blaine | 38 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Armells Reservoir | Montana | Fergus | 38 | Low | — | 1951 | Irrigation |
| Holliday -Flagstaff Lake- | Montana | Meagher | 38 | Low | — | 1939 | Irrigation |
| Gutshot Detention Dam | Montana | Valley | 38 | Low | Unsatisfactory | 1965 | Flood Risk Reduction |
| Wolf Coulee Dam | Montana | Teton | 38 | Significant | — | 2004 | Irrigation |
| Cottonwood | Montana | Fergus | 38 | Low | — | 1964 | Fire Protection, Stock, Or ... |
| Pishkun Dike 4 | Montana | Teton | 38 | High | Not Available | 1931 | Irrigation |
| Davis Creek Dam | Montana | Powell | 38 | Significant | Not Rated | 1960 | Irrigation |
| Tarzan | Montana | Blaine | 38 | Low | — | 1973 | Fire Protection, Stock, Or ... |
| Christensen (Richland) | Montana | Richland | 38 | Low | — | 1970 | Flood Risk Reduction |
| Gollaher Reservoir | Montana | Cascade | 38 | Significant | — | 1945 | Irrigation |
| Jordan Dam | Montana | Park | 38 | High | Poor | 1961 | Irrigation |
| Mccarter North Dam | Montana | Toole | 38 | Significant | — | 1953 | Irrigation |
| Yellow Water Main Dam | Montana | Petroleum | 37 | High | Fair | 1938 | Irrigation |
| Reser Dam | Montana | Blaine | 37 | Low | Unsatisfactory | 1980 | Recreation |
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.