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 |
|---|---|---|---|---|---|---|---|
| Letz Lake | Montana | Pondera | 30 | Low | — | 1952 | Fire Protection, Stock, Or ... |
| Jo | Montana | Fergus | 30 | Low | — | 1962 | Fire Protection, Stock, Or ... |
| Durfee Creek Dam | Montana | Fergus | 30 | Low | — | — | Irrigation |
| Mcmullin Bros Detention | Montana | Prairie | 30 | Low | — | 1966 | Fire Protection, Stock, Or ... |
| Lazy Jd #10 | Montana | Fergus | 30 | Low | — | 1958 | Fire Protection, Stock, Or ... |
| Staff #2 | Montana | Blaine | 30 | Low | — | 1914 | Irrigation |
| Castor | Montana | Toole | 30 | Low | — | 1914 | Fire Protection, Stock, Or ... |
| Mcintyre Reservoir | Montana | Toole | 30 | Significant | — | 1930 | Fire Protection, Stock, Or ... |
| Red | Montana | Fergus | 30 | Significant | — | 1963 | Fire Protection, Stock, Or ... |
| Pepper #1 | Montana | Park | 30 | Low | — | 1953 | Irrigation |
| Earl Krietel #4 | Montana | Carter | 30 | Low | — | 1956 | Irrigation |
| Petticoat Junction | Montana | Fergus | 30 | Low | — | 1963 | Fire Protection, Stock, Or ... |
| Hollandsworth | Montana | Liberty | 30 | Low | — | 1946 | Fire Protection, Stock, Or ... |
| Gordon Cattle Company #3 | Montana | Blaine | 30 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Sediment Control Dam | Montana | Big Horn | 30 | Low | Not Available | — | Other |
| Lazy J-D #1 | Montana | Phillips | 30 | Low | — | 1952 | Irrigation |
| Bull Pen #1 | Montana | Pondera | 30 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Balsam #3 | Montana | Custer | 30 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Smile #2 | Montana | Dawson | 30 | Low | — | 1953 | Fire Protection, Stock, Or ... |
| Fowler #1 (Pondera) | Montana | Pondera | 30 | Low | — | 1909 | Fire Protection, Stock, Or ... |
| Lazy Jd #12 | Montana | Phillips | 30 | Low | — | 1959 | Fire Protection, Stock, Or ... |
| Tutsch Reservoir | Montana | Fergus | 30 | Low | — | 1939 | Fire Protection, Stock, Or ... |
| Thibadeau Farm | Montana | Hill | 30 | Low | — | 1937 | Fire Protection, Stock, Or ... |
| Veseth Reservoir | Montana | Phillips | 30 | Significant | — | 1925 | Irrigation |
| K and L Mc Dowell #3 | Montana | Carter | 30 | Low | — | 1969 | Irrigation |
| Olson (Prairie) | Montana | Prairie | 30 | Low | — | 1963 | Irrigation |
| Robinson | Montana | Phillips | 30 | Low | — | 1945 | Flood Risk Reduction |
| Wanken | Montana | Toole | 30 | Significant | — | 1928 | Fire Protection, Stock, Or ... |
| Olson (Richland) | Montana | Richland | 30 | Significant | — | 1958 | Fire Protection, Stock, Or ... |
| Dawson Ranch #1 | Montana | Cascade | 30 | Low | — | 1948 | Flood Risk Reduction |
| Manuel #1 | Montana | Petroleum | 30 | Low | — | 1949 | Fire Protection, Stock, Or ... |
| Sagebrush #2 | Montana | Phillips | 30 | Low | — | 1967 | Fire Protection, Stock, Or ... |
| Gearhart #13 | Montana | Rosebud | 30 | Low | — | 1953 | Fire Protection, Stock, Or ... |
| Daniel #3 | Montana | Hill | 30 | Low | — | 1976 | Fire Protection, Stock, Or ... |
| Traub #1 | Montana | Powder River | 30 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| Hirschy | Montana | Beaverhead | 30 | Low | — | 1967 | Irrigation |
| Private Reservoir | Montana | Phillips | 30 | Low | — | 1935 | Fire Protection, Stock, Or ... |
| Payton #2 | Montana | Prairie | 30 | Low | — | 1954 | Fire Protection, Stock, Or ... |
| Wm Knight #2 | Montana | Phillips | 30 | Low | — | 1942 | Other |
| Toy Box | Montana | Chouteau | 30 | Low | — | 1973 | Fire Protection, Stock, Or ... |
| Halverson #1 | Montana | Yellowstone | 30 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Jensen Dam | Montana | Garfield | 30 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Pepper #2 | Montana | Park | 30 | Low | — | 1954 | Irrigation |
| Fannon #1 | Montana | Garfield | 30 | Low | — | 1938 | Fire Protection, Stock, Or ... |
| Hassett #3 | Montana | Petroleum | 30 | Low | — | 1958 | Irrigation |
| Mcmullin Bros Cooperative | Montana | Prairie | 30 | Low | — | 1964 | Fire Protection, Stock, Or ... |
| Hound Creek | Montana | Cascade | 30 | Low | — | 1953 | Irrigation |
| Middle Creek Lake (Cascade) | Montana | Cascade | 30 | Significant | — | 1950 | Irrigation |
| Crow #1 | Montana | McCone | 30 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Foulweather Detention Dam | Montana | Valley | 30 | Low | Poor | 1966 | 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.