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 |
|---|---|---|---|---|---|---|---|
| Arther Dengel #1 | Montana | Fergus | 24 | Significant | — | 1948 | Irrigation |
| Voldseth East Dam | Montana | Meagher | 24 | High | Fair | 1939 | Irrigation |
| Margaret Hays #1 | Montana | McCone | 24 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Berkholder Dam | Montana | Toole | 24 | Low | — | 1904 | Fire Protection, Stock, Or ... |
| Moore #7 | Montana | Custer | 24 | Low | — | 1959 | Fire Protection, Stock, Or ... |
| Capricorn | Montana | Hill | 24 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Fish | Montana | Beaverhead | 24 | Low | Not Available | 1956 | Irrigation |
| J.L. Big Reservoir | Montana | Glacier | 24 | Low | — | — | Irrigation |
| Hamlick Reservoir | Montana | Custer | 24 | Low | — | 1959 | Fire Protection, Stock, Or ... |
| French #12 | Montana | Custer | 24 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Blackfoot Detention Dam | Montana | Carter | 23 | Low | Unsatisfactory | 1959 | Fire Protection, Stock, Or ... |
| Cornwell | Montana | Valley | 23 | Significant | — | 1952 | Irrigation |
| Vr-80 Retention Dam | Montana | Valley | 23 | Low | Not Rated | 2003 | Fire Protection, Stock, Or ... |
| O'Halloran | Montana | Park | 23 | Significant | — | 1960 | Irrigation |
| Big Timber #49 | Montana | Rosebud | 23 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| Willow Creek BOR MT-Dike 5 | Montana | Lewis and Clark | 23 | High | Not Available | 1940 | Irrigation |
| Sterret | Montana | Meagher | 23 | Low | — | 1910 | Irrigation |
| Engdahl #6 | Montana | Garfield | 23 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Arthun Dam | Montana | Park | 23 | Significant | — | 1956 | Irrigation |
| Binions Reservoir #2 | Montana | Garfield | 23 | Low | — | 1938 | Fire Protection, Stock, Or ... |
| Allen #6 | Montana | Powder River | 23 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Shipley Reservoir (Powder R.) | Montana | Powder River | 23 | Low | — | 1961 | Irrigation |
| Binion #3 | Montana | Garfield | 23 | Significant | — | 1945 | Fire Protection, Stock, Or ... |
| Hurricane Detention Dam | Montana | Valley | 23 | Low | Unsatisfactory | 1957 | Fire Protection, Stock, Or ... |
| Br-12 Retention Dam | Montana | Blaine | 23 | High | Satisfactory | 1936 | Flood Risk Reduction |
| Lower Baker Dam | Montana | Fallon | 23 | High | Satisfactory | 1908 | Recreation |
| Chico Flats | Montana | Valley | 23 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| Rogers #2 | Montana | Custer | 23 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Downs, Jack | Montana | Dawson | 23 | Low | — | 1938 | Irrigation |
| Hirsch #1 | Montana | Custer | 23 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| School #2 | Montana | Garfield | 23 | Low | — | 1954 | Fire Protection, Stock, Or ... |
| Scott #2 | Montana | Custer | 23 | Low | — | 1944 | Fire Protection, Stock, Or ... |
| Murnion Dam | Montana | Garfield | 23 | Low | — | — | Irrigation |
| Deadmans Basin Dike | Montana | Wheatland | 23 | High | Satisfactory | 1941 | Irrigation |
| Wicker Basket #1 | Montana | Fergus | 23 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Pr-19 Retention Dam | Montana | Phillips | 23 | High | Satisfactory | 1936 | Fire Protection, Stock, Or ... |
| Erickson | Montana | Richland | 23 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Tomahawk Detention Dam | Montana | Valley | 23 | Low | Unsatisfactory | 1962 | Flood Risk Reduction |
| Beecher #3 | Montana | Garfield | 23 | Low | — | 1973 | Fire Protection, Stock, Or ... |
| O'Halloran #1 | Montana | Park | 23 | Low | — | 1958 | Irrigation |
| Lars Borg | Montana | Richland | 23 | Significant | — | 1977 | Fire Protection, Stock, Or ... |
| Karen #7 | Montana | Garfield | 23 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Ringstveit Reservoir | Montana | Rosebud | 23 | Low | — | 1976 | Fire Protection, Stock, Or ... |
| Hamster | Montana | Wibaux | 23 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Lois Lake | Montana | Powell | 23 | Low | — | 1966 | Irrigation |
| Saskview Dam | Montana | Valley | 23 | Low | Not Rated | 2003 | |
| Ward Dam | Montana | Valley | 23 | Low | Fair | 2003 | Fish and Wildlife Pond |
| O'Haire | Montana | Toole | 23 | Low | — | 1954 | Irrigation |
| South Meadow Creek Dam | Montana | Madison | 22 | High | Not Available | 1968 | Irrigation |
| Apache Dam | Montana | Carter | 22 | Low | Satisfactory | — | 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.