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 |
|---|---|---|---|---|---|---|---|
| Long Horn #4 | Montana | Valley | 16 | Low | — | 1952 | Fire Protection, Stock, Or ... |
| Swan Dam | Montana | Toole | 16 | Low | Not Rated | 2003 | |
| Adams #2 | Montana | Fergus | 16 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Havre Reservoir | Montana | Fergus | 16 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| J Janssen #1 | Montana | Powder River | 16 | Low | — | 1940 | Irrigation |
| Cherry Creek #6 | Montana | Rosebud | 16 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Schoolhouse #6 | Montana | Phillips | 16 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Big Timber #5 | Montana | Rosebud | 16 | Low | — | 1953 | Fire Protection, Stock, Or ... |
| Big Timber #13 | Montana | Rosebud | 16 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Missouri Wolf | Montana | Judith Basin | 16 | Low | — | 1950 | Recreation |
| Jjjj Russ | Montana | Richland | 16 | Low | — | 1962 | Fire Protection, Stock, Or ... |
| Klatt | Montana | Madison | 16 | Low | Not Available | 1949 | Irrigation |
| Delaney | Montana | Richland | 16 | Significant | — | 1961 | Irrigation |
| Miller (Blaine) | Montana | Blaine | 16 | Significant | — | 1939 | Irrigation |
| Weeding #3 | Montana | Garfield | 16 | Low | — | 1962 | Fire Protection, Stock, Or ... |
| Hovland | Montana | Valley | 16 | Low | — | 1959 | Fire Protection, Stock, Or ... |
| Nomland Dam | Montana | McCone | 16 | Low | — | 1964 | Fire Protection, Stock, Or ... |
| Big Timber #44 | Montana | Rosebud | 16 | Low | — | 1973 | Fire Protection, Stock, Or ... |
| Jordan Dam | Montana | Valley | 16 | Low | Unsatisfactory | — | |
| Big Timber #29 | Montana | Rosebud | 16 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Big Timber #27 | Montana | Rosebud | 16 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Little Brazil | Montana | Valley | 16 | Low | — | 1939 | Fire Protection, Stock, Or ... |
| John Ball Reservoir | Montana | McCone | 16 | Significant | — | 1935 | Fire Protection, Stock, Or ... |
| Gearhart #15 | Montana | Rosebud | 16 | Low | — | 1951 | Fire Protection, Stock, Or ... |
| Jelly Bean | Montana | Fergus | 16 | Low | — | 1940 | Irrigation |
| Horte | Montana | Lake | 16 | Low | Not Rated | 1916 | Irrigation |
| Towe Farms INC #1 | Montana | McCone | 16 | Low | — | 1969 | Fire Protection, Stock, Or ... |
| Cottonwood Grazing #4 Dam | Montana | Phillips | 16 | Low | Not Rated | — | |
| Pishkun Dike 7 | Montana | Teton | 16 | High | Not Available | 1931 | Irrigation |
| Pishkun Dike 6 | Montana | Teton | 16 | High | Not Available | 1931 | Irrigation |
| Towe Farms INC #2 | Montana | McCone | 16 | Low | — | 1967 | Fire Protection, Stock, Or ... |
| Willow Creek Flat Dam (Valley) | Montana | Valley | 16 | Low | Unsatisfactory | — | |
| Golden Gate Dam | Montana | Blaine | 16 | Low | Not Rated | — | Flood Risk Reduction |
| Eva Murphy #1 | Montana | Fergus | 16 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Pishkun Dike 8 | Montana | Teton | 16 | High | Not Available | 1931 | Irrigation |
| Bond Lake Dam | Montana | Beaverhead | 16 | Low | — | 1977 | Irrigation |
| Duck Creek Retention Dam | Montana | Petroleum | 16 | High | Satisfactory | 2003 | Fire Protection, Stock, Or ... |
| Pr-71 Retention Dam | Montana | Phillips | 16 | Low | Not Rated | 1936 | Fire Protection, Stock, Or ... |
| Three Trees Detention Dam | Montana | Valley | 16 | Low | Unsatisfactory | 1954 | Flood Risk Reduction |
| Br-55 Retention Dam | Montana | Blaine | 16 | Low | Not Rated | 1937 | Flood Risk Reduction |
| Pr-88 Retention Dam | Montana | Phillips | 16 | Low | Not Rated | 1936 | Fire Protection, Stock, Or ... |
| Dead Horse Detention Dam | Montana | Valley | 16 | Low | Satisfactory | 1960 | Flood Risk Reduction |
| Flat Retention Dam / Mister Bill Dam | Montana | Phillips | 16 | Low | Unsatisfactory | 1973 | Fire Protection, Stock, Or ... |
| Frey | Montana | Yellowstone | 15 | Low | — | 1930 | Fire Protection, Stock, Or ... |
| Lake Seventeen Dam | Montana | Blaine | 15 | Low | Not Available | 1930 | |
| Bronze | Montana | Garfield | 15 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Elroy | Montana | Richland | 15 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Christenson | Montana | Garfield | 15 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Nelsons | Montana | Valley | 15 | Low | — | 1947 | Fire Protection, Stock, Or ... |
| Perigee | Montana | Hill | 15 | Low | — | 1935 | 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.