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 |
|---|---|---|---|---|---|---|---|
| Foulweather Detention Dam | Montana | Valley | 30 | Low | Poor | 1966 | Flood Risk Reduction |
| Keep Cool | Montana | Meagher | 30 | Significant | — | 1950 | Irrigation |
| Private Reservoir | Montana | Phillips | 30 | Low | — | 1935 | Fire Protection, Stock, Or ... |
| Cecrle #1 Dam | Montana | Judith Basin | 30 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Hassett #3 | Montana | Petroleum | 30 | Low | — | 1958 | Irrigation |
| Cinnamon #4 | Montana | Wheatland | 30 | Low | — | 1973 | Irrigation |
| Agnes Bob and Noel | Montana | Chouteau | 30 | Low | — | 1957 | Fire Protection, Stock, Or ... |
| Sagebrush #2 | Montana | Phillips | 30 | Low | — | 1967 | Fire Protection, Stock, Or ... |
| Olson (Richland) | Montana | Richland | 30 | Significant | — | 1958 | Fire Protection, Stock, Or ... |
| Fish (Fergus) | Montana | Fergus | 30 | Significant | — | 1963 | Fire Protection, Stock, Or ... |
| Balsam #3 | Montana | Custer | 30 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Dick Golie Wildlife Dam | Montana | Cascade | 30 | Low | — | 1965 | Recreation |
| Cabin | Montana | Prairie | 30 | Low | Not Available | 1954 | Fire Protection, Stock, Or ... |
| Keogh | Montana | Jefferson | 30 | Low | Not Available | 1956 | Irrigation |
| Thibadeau Farm | Montana | Hill | 30 | Low | — | 1937 | Fire Protection, Stock, Or ... |
| Middle Creek Lake (Cascade) | Montana | Cascade | 30 | Significant | — | 1950 | Irrigation |
| Wm Knight #2 | Montana | Phillips | 30 | Low | — | 1942 | Other |
| Wanken | Montana | Toole | 30 | Significant | — | 1928 | Fire Protection, Stock, Or ... |
| Drga Dam | Montana | Chouteau | 30 | Significant | — | 1938 | Fire Protection, Stock, Or ... |
| Rock Creek Lake | Montana | Powell | 30 | Significant | — | 1960 | Water Supply |
| Loomis, D. #2 | Montana | Garfield | 30 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| D G Orchowski #1 | Montana | Big Horn | 30 | Low | — | 1963 | Irrigation |
| Blixit Creek | Montana | Missoula | 30 | High | Satisfactory | 1961 | Irrigation |
| Antares | Montana | Judith Basin | 30 | Low | — | 1954 | Irrigation |
| Wild Flower | Montana | Musselshell | 30 | Low | — | 1966 | Fire Protection, Stock, Or ... |
| Leidholt Dam | Montana | Custer | 30 | Low | Not Rated | — | |
| Pepper #2 | Montana | Park | 30 | Low | — | 1954 | Irrigation |
| Halverson #1 | Montana | Yellowstone | 30 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Fannon #1 | Montana | Garfield | 30 | Low | — | 1938 | Fire Protection, Stock, Or ... |
| Engdall Reservoir #1 | Montana | Garfield | 30 | Low | — | 1937 | Fire Protection, Stock, Or ... |
| Pepper #1 | Montana | Park | 30 | Low | — | 1953 | Irrigation |
| Mccoys | Montana | Daniels | 30 | Low | — | 1966 | Fire Protection, Stock, Or ... |
| Deadmans Basin Water Supply Canal Storage Reservoir #5 | Montana | Wheatland | 30 | Significant | — | — | Water Supply |
| Mesaros | Montana | Cascade | 30 | Low | — | 1958 | Fire Protection, Stock, Or ... |
| Ayers | Montana | Meagher | 30 | Low | — | 1946 | Irrigation |
| Gritty Milk | Montana | Hill | 30 | Low | — | 1938 | Fire Protection, Stock, Or ... |
| French #2 | Montana | Custer | 30 | Low | — | 1947 | Fire Protection, Stock, Or ... |
| Mcmullin Bros Upper | Montana | Prairie | 30 | Low | — | 1960 | Irrigation |
| Chuck #1 | Montana | Garfield | 30 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Hollar | Montana | Wibaux | 30 | Low | — | 1949 | Fire Protection, Stock, Or ... |
| Knockin'Knees Reservoir | Montana | Liberty | 30 | Low | — | 1952 | Fire Protection, Stock, Or ... |
| Keil Ranch Reservoir #1 | Montana | Pondera | 30 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Minutemen | Montana | Prairie | 30 | Low | — | 1952 | Irrigation |
| D G Orchowski #2 | Montana | Big Horn | 30 | Low | — | 1958 | Fire Protection, Stock, Or ... |
| Cool Black Rock | Montana | Hill | 30 | Low | — | 1919 | Fire Protection, Stock, Or ... |
| Kindle #2 | Montana | Fergus | 30 | Low | — | 1954 | Fire Protection, Stock, Or ... |
| Shaw #3 | Montana | Garfield | 30 | Low | — | 1947 | Fire Protection, Stock, Or ... |
| Complimentary | Montana | Judith Basin | 30 | Low | — | 1950 | Irrigation |
| Staff #2 | Montana | Blaine | 30 | Low | — | 1914 | Irrigation |
| Lucas #3 | Montana | Meagher | 30 | Low | — | 1941 | Fire Protection, Stock, Or ... |
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.