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 |
|---|---|---|---|---|---|---|---|
| Flat Milford Colony | Montana | Lewis and Clark | 15 | Low | - | 1955 | Fire Protection, Stock, Or ... |
| B'Rer Rabbit | Montana | Blaine | 15 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Coffee Mate | Montana | Fergus | 15 | Low | - | 1938 | Fire Protection, Stock, Or ... |
| Hanson CO #12 | Montana | Rosebud | 15 | Low | - | 1954 | Irrigation |
| Hanson CO #11 | Montana | Rosebud | 15 | Low | - | 1962 | Irrigation |
| Scheffer (Missoula) | Montana | Missoula | 15 | Low | - | 1948 | Irrigation |
| Lower Indian Creek Reservoir | Montana | Big Horn | 15 | Significant | - | 1950 | Fire Protection, Stock, Or ... |
| Rockport Colony #2 | Montana | Teton | 15 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Cramer (Sweet Grass) | Montana | Sweet Grass | 15 | Low | - | 1960 | Irrigation |
| Wendall Willkie | Montana | Judith Basin | 15 | Significant | - | 1965 | Fire Protection, Stock, Or ... |
| Smith Lake | Montana | Lewis and Clark | 15 | Significant | - | 1954 | Fire Protection, Stock, Or ... |
| J Jacobsen #1 | Montana | Daniels | 15 | Significant | - | 1964 | Fire Protection, Stock, Or ... |
| Twin Dam #2 | Montana | Rosebud | 15 | Low | - | 1959 | Irrigation |
| John Boy #2 | Montana | Garfield | 15 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Swank Reservoir | Montana | Roosevelt | 15 | Low | - | 1952 | Fire Protection, Stock, Or ... |
| J R Scott #9 | Montana | Big Horn | 15 | Low | - | 1956 | Fire Protection, Stock, Or ... |
| Fleming #2 | Montana | Rosebud | 15 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| J R Scott #12 | Montana | Big Horn | 15 | Low | - | 1957 | Fire Protection, Stock, Or ... |
| Lyle Nelson #5 | Montana | McCone | 15 | Low | - | 1949 | Fire Protection, Stock, Or ... |
| Heapby Reservoir | Montana | Deer Lodge | 15 | Low | - | 1958 | Irrigation |
| Christmas Dam #1 | Montana | Garfield | 15 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Herrin Lake | Montana | Lewis and Clark | 15 | Low | - | 1949 | Fire Protection, Stock, Or ... |
| Nefsy #3 | Montana | Prairie | 15 | Low | - | 1953 | Fire Protection, Stock, Or ... |
| Ed Rath #1 | Montana | Carter | 15 | Low | - | 1940 | Fire Protection, Stock, Or ... |
| Clover Drop Dam | Montana | Valley | 15 | Low | Satisfactory | - | |
| Big Timber Sewage Lagoon | Montana | Sweet Grass | 15 | Low | - | 1959 | Other |
| Yellow Haired Custer | Montana | Yellowstone | 15 | Low | - | 1967 | Fire Protection, Stock, Or ... |
| Ghost #3 | Montana | Valley | 15 | Low | - | 1930 | Fire Protection, Stock, Or ... |
| Lee #11 | Montana | Rosebud | 15 | Low | - | 1950 | Irrigation |
| Lyle Nelson #3 | Montana | McCone | 15 | Low | - | 1949 | Fire Protection, Stock, Or ... |
| Rock Creek | Montana | Beaverhead | 15 | Low | - | 1965 | Irrigation |
| Tomeyer #1 | Montana | Toole | 15 | Low | - | 1920 | Irrigation |
| Hook #64 | Montana | Rosebud | 15 | Low | - | 1954 | Fire Protection, Stock, Or ... |
| Blunt Ranch #3 | Montana | Phillips | 15 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Goldberg West Dam | Montana | Granite | 15 | Low | Not Available | 1956 | Irrigation |
| R Myhre #1 | Montana | Fallon | 15 | Significant | - | 1945 | Fire Protection, Stock, Or ... |
| Montana #7 | Montana | Rosebud | 15 | Low | - | 1953 | Fire Protection, Stock, Or ... |
| D S Scott #2 | Montana | Big Horn | 15 | Low | - | 1930 | Fire Protection, Stock, Or ... |
| Re-Regulating | Montana | Stillwater | 15 | Low | Satisfactory | 1979 | Hydroelectric |
| Peterson (Richland) | Montana | Richland | 15 | Low | - | 1957 | Fire Protection, Stock, Or ... |
| Vr-57 Dam | Montana | Valley | 15 | Low | Not Rated | - | |
| Fly Swatter #1 | Montana | Carter | 15 | Significant | - | 1920 | Fire Protection, Stock, Or ... |
| David Drum #3 | Montana | Phillips | 15 | Low | - | 1950 | Irrigation |
| Medicine Lake Dam No. 4 | Montana | Sheridan | 15 | Low | Poor | 1935 | Fish and Wildlife Pond |
| Oliver Detention Dam | Montana | Carter | 15 | Low | Poor | 2003 | Flood Risk Reduction |
| Big Timber #1 | Montana | Rosebud | 15 | Low | - | 1950 | Fire Protection, Stock, Or ... |
| Beaver Ranch Dam | Montana | Madison | 15 | High | Satisfactory | 1945 | Fire Protection, Stock, Or ... |
| Milford Colony | Montana | Lewis and Clark | 15 | Low | - | 1963 | Fire Protection, Stock, Or ... |
| Miss Doll Dial Dam | Montana | Blaine | 15 | Low | Not Rated | - | Flood Risk Reduction |
| Montana #18 | Montana | Rosebud | 15 | Low | - | 1959 | 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.