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 |
|---|---|---|---|---|---|---|---|
| Shady Lane | Montana | McCone | 20 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Dolomites | Montana | Judith Basin | 20 | Low | - | 1958 | Fire Protection, Stock, Or ... |
| Murray #1 | Montana | Custer | 20 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Daniel #1 | Montana | Hill | 20 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Lower Blacktail Reservoir | Montana | Rosebud | 20 | Low | - | 1955 | Fire Protection, Stock, Or ... |
| Alkali (Toole) | Montana | Toole | 20 | Low | - | 1907 | Irrigation |
| U N Reservoir | Montana | Hill | 20 | Low | - | 1940 | Fire Protection, Stock, Or ... |
| Douglas Creek Dam | Montana | Granite | 20 | Low | - | 1968 | Other |
| #6 | Montana | Blaine | 20 | Low | - | 1938 | Irrigation |
| Reeves | Montana | Fergus | 20 | Low | - | 1930 | Fire Protection, Stock, Or ... |
| Banka Dama | Montana | Pondera | 20 | Low | - | 1930 | Fire Protection, Stock, Or ... |
| Wilson #1 (Toole) | Montana | Toole | 20 | Low | - | 1935 | Water Supply |
| Sandman #1 | Montana | Petroleum | 20 | Low | - | 1960 | Irrigation |
| Halmans #3 | Montana | Fallon | 20 | Low | - | 1954 | Irrigation |
| Ulmer Lake | Montana | Rosebud | 20 | Low | - | 1953 | Fire Protection, Stock, Or ... |
| Wallenstein | Montana | Carter | 20 | Low | - | 1945 | Irrigation |
| Waterman | Montana | Chouteau | 20 | Low | - | 1945 | Fire Protection, Stock, Or ... |
| Looney Tuney | Montana | Toole | 20 | Low | - | 1950 | Fire Protection, Stock, Or ... |
| Herzog #2 | Montana | Custer | 20 | Low | - | 1973 | Irrigation |
| Leachman #4 | Montana | Yellowstone | 20 | Low | - | 1979 | Fire Protection, Stock, Or ... |
| Plunket Lake | Montana | Broadwater | 20 | Low | - | 1920 | Irrigation |
| Dolcefarniente | Montana | Judith Basin | 20 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Cherry Creek #9 | Montana | Rosebud | 20 | Low | - | 1968 | Other |
| Pines Dam | Montana | Valley | 20 | Low | Unsatisfactory | - | |
| O Lane #1 | Montana | Fergus | 20 | Low | - | 1975 | Fire Protection, Stock, Or ... |
| Best Rocky Twist | Montana | Blaine | 20 | Low | - | 1965 | Fire Protection, Stock, Or ... |
| Big Timber #20 | Montana | Rosebud | 20 | Low | - | 1959 | Fire Protection, Stock, Or ... |
| Pawlowski Reservoir | Montana | McCone | 20 | Low | - | 1950 | Irrigation |
| Caldwell | Montana | Garfield | 20 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Phillippi #1 | Montana | Carter | 20 | Significant | - | 1952 | Irrigation |
| Cherry Creek #4 | Montana | Rosebud | 20 | Low | - | 1945 | Irrigation |
| Wilde | Montana | Roosevelt | 20 | Low | - | 1942 | Irrigation |
| Ten | Montana | Garfield | 20 | Low | - | 1940 | Fire Protection, Stock, Or ... |
| Green #4 | Montana | Powder River | 20 | Low | - | 1970 | Irrigation |
| Leo #2 | Montana | Fallon | 20 | Low | - | 1954 | Fire Protection, Stock, Or ... |
| Ostrich Egg | Montana | Hill | 20 | Low | - | 1950 | Fire Protection, Stock, Or ... |
| D Hannaland #1 | Montana | McCone | 20 | Low | - | 1959 | Fire Protection, Stock, Or ... |
| Dreyer #2 | Montana | McCone | 20 | Low | - | 1964 | Fire Protection, Stock, Or ... |
| Big Jugs | Montana | Hill | 20 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Two D-4 Ranch | Montana | Carter | 20 | Low | - | 1952 | Fire Protection, Stock, Or ... |
| Miller Brothers Livestock Reservoir | Montana | Judith Basin | 20 | Low | - | 1975 | Fire Protection, Stock, Or ... |
| Deerborn Reservoir | Montana | Lewis and Clark | 20 | Low | - | 1900 | Irrigation |
| Prairie Nest Ranch 2 | Montana | Cascade | 20 | Low | - | 1920 | Fire Protection, Stock, Or ... |
| Brain | Montana | Dawson | 20 | Low | - | 1948 | Fire Protection, Stock, Or ... |
| Curran-Barrett #2 | Montana | Lewis and Clark | 20 | Low | - | 1899 | Irrigation |
| Pcb | Montana | Daniels | 20 | Low | - | 1950 | Fire Protection, Stock, Or ... |
| Ryan (Garfield) | Montana | Garfield | 20 | Low | - | 1968 | Fire Protection, Stock, Or ... |
| Bowman Lake 2 | Montana | Powell | 20 | Low | Not Available | 1961 | Irrigation |
| Smoky Dam | Montana | Sweet Grass | 20 | Low | - | 1968 | Other |
| Evans, L. | Montana | Lewis and Clark | 20 | Low | - | 1961 | 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.