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 |
|---|---|---|---|---|---|---|---|
| Balsam #6 | Montana | Custer | 19 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| Larson #2 | Montana | Custer | 19 | Low | — | 1963 | Fire Protection, Stock, Or ... |
| Taylor (Garfield) | Montana | Garfield | 19 | Low | — | 1968 | Other |
| Wild Horse Dam Pd | Montana | Phillips | 19 | Low | Not Rated | — | |
| Robinson #7 | Montana | Custer | 19 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Underdal #1 | Montana | Toole | 19 | Low | — | 1963 | Recreation |
| Todd #1 | Montana | Custer | 19 | Low | — | 1936 | Irrigation |
| Zimmerman Retention Dam #1 | Montana | Petroleum | 19 | Low | Not Rated | 2003 | Fire Protection, Stock, Or ... |
| Montana #3 | Montana | Rosebud | 19 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| Rp Griffith #1 | Montana | Musselshell | 19 | Low | — | 1963 | Irrigation |
| Cinnamon #2 | Montana | Wheatland | 19 | Low | — | 1974 | Irrigation |
| Jackson #1 | Montana | Madison | 19 | Significant | — | 1924 | Irrigation |
| Gc Lande #1 | Montana | Big Horn | 19 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Lockie #2 | Montana | Custer | 19 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| Sweo | Montana | Valley | 19 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Double Crossing Detention Dam | Montana | Valley | 19 | Low | Unsatisfactory | 1962 | Flood Risk Reduction |
| Dubbe Reservoir | Montana | Valley | 19 | Low | — | 1937 | Fire Protection, Stock, Or ... |
| Thelma #1 | Montana | Park | 19 | Low | — | 1962 | Irrigation |
| Liming Reservoir | Montana | Big Horn | 19 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Wood (Toole) | Montana | Toole | 19 | Low | — | 1963 | Irrigation |
| Fox #1 | Montana | Custer | 19 | Low | — | 1955 | Fire Protection, Stock, Or ... |
| Buffalo | Montana | Valley | 19 | Low | — | 1910 | Irrigation |
| Cattle Dam | Montana | Custer | 19 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| R Downs #6 | Montana | Big Horn | 19 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Heble | Montana | Fergus | 19 | Low | — | 1954 | Fire Protection, Stock, Or ... |
| Jim Detention Dam | Montana | Valley | 19 | Low | Satisfactory | 1964 | Flood Risk Reduction |
| Paddle Board | Montana | Chouteau | 19 | Low | — | 1972 | Irrigation |
| Hand #3 | Montana | Phillips | 19 | Low | — | 1954 | Irrigation |
| Hamms Detention Dam | Montana | Valley | 19 | Low | Unsatisfactory | 1957 | Fire Protection, Stock, Or ... |
| H M Scott #2 | Montana | Custer | 19 | Low | — | 1963 | Fire Protection, Stock, Or ... |
| Albert #1 | Montana | Fergus | 19 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Lori Detention Dam | Montana | Valley | 19 | Low | Unsatisfactory | 1964 | Flood Risk Reduction |
| Eliasson (Petroleum) | Montana | Petroleum | 19 | Low | — | 1939 | Fire Protection, Stock, Or ... |
| Coal Creek Dam #1 | Montana | Custer | 19 | Low | — | 1949 | Fire Protection, Stock, Or ... |
| Sassy Top Deck | Montana | Hill | 19 | Low | — | 1938 | Fire Protection, Stock, Or ... |
| Hainie Reservoir | Montana | McCone | 19 | Low | — | 1942 | Fire Protection, Stock, Or ... |
| Br-52 Retention Dam | Montana | Blaine | 19 | Low | Not Rated | 1937 | Flood Risk Reduction |
| North Beaver Detention Dam | Montana | Valley | 19 | Low | Unsatisfactory | 1957 | Flood Risk Reduction |
| Jakes Dam | Montana | Fergus | 19 | Low | Not Rated | 1946 | Fish and Wildlife Pond |
| Grant Dam | Montana | Prairie | 19 | Low | Not Rated | — | |
| Vanette'S Dam | Montana | Powder River | 19 | Significant | — | 1912 | Irrigation |
| Wiggins #3 | Montana | Petroleum | 19 | Low | — | 1967 | Irrigation |
| Nefsy #1 | Montana | Custer | 19 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Hanson | Montana | Valley | 19 | Low | — | 1965 | Irrigation |
| Tin Cup Lake (Powell) | Montana | Powell | 19 | High | Fair | 1965 | Irrigation |
| John Ragsdale Dam | Montana | Park | 19 | Low | — | 1980 | Irrigation |
| North Fork Plug Dam | Montana | Valley | 19 | Low | Unsatisfactory | — | |
| Jensen Reservoir (Dawson) | Montana | Dawson | 19 | Low | — | 1951 | Irrigation |
| Albert #2 | Montana | Fergus | 19 | Low | — | 1936 | Fire Protection, Stock, Or ... |
| Jeffrey #1 | Montana | Garfield | 18 | Low | — | 1958 | Irrigation |
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.