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 |
|---|---|---|---|---|---|---|---|
| Pr-110 Retention Dam | Montana | Phillips | 21 | Low | Not Rated | 1936 | Fire Protection, Stock, Or ... |
| Robinson #8 | Montana | Custer | 21 | Low | — | 1944 | Fire Protection, Stock, Or ... |
| Weigand Reservoir East | Montana | Phillips | 21 | High | Not Rated | — | |
| Half Barrel Detention Dam | Montana | Valley | 21 | Low | Unsatisfactory | 1956 | Fire Protection, Stock, Or ... |
| Southerland Lacosta | Montana | Garfield | 21 | Low | — | 1957 | Fire Protection, Stock, Or ... |
| Norman #4 (Fergus) | Montana | Fergus | 21 | Low | — | 1945 | Irrigation |
| Canyon Lake | Montana | Ravalli | 21 | High | Satisfactory | 1891 | Irrigation |
| Rieger | Montana | Fallon | 21 | Significant | — | 1958 | Irrigation |
| Walkerville | Montana | McCone | 21 | Low | — | 1939 | Fire Protection, Stock, Or ... |
| Allen #5 | Montana | Custer | 21 | Low | — | 1964 | Fire Protection, Stock, Or ... |
| Jasper | Montana | Blaine | 21 | Low | — | 1938 | Fire Protection, Stock, Or ... |
| Herzog #3 | Montana | Custer | 21 | Low | — | 1955 | Fire Protection, Stock, Or ... |
| Longhorn #1/Horny Detention Dam | Montana | Valley | 21 | Low | Fair | 1966 | Flood Risk Reduction |
| Holzhey | Montana | Sweet Grass | 21 | Low | — | 1956 | Irrigation |
| Lockie #10 | Montana | Custer | 21 | Low | — | 1955 | Fire Protection, Stock, Or ... |
| 761 Lang | Montana | Fallon | 21 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| J Witkowski #1 | Montana | Wibaux | 21 | Low | — | 1969 | Fire Protection, Stock, Or ... |
| Russiff #2 | Montana | Powder River | 21 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Carter Pond, Lower (Fergus) | Montana | Fergus | 21 | Significant | — | 1938 | Fire Protection, Stock, Or ... |
| Carter Pond, Upper (Fergus) | Montana | Fergus | 21 | Significant | — | 1951 | Fire Protection, Stock, Or ... |
| Maney | Montana | Jefferson | 21 | Low | Not Rated | 1979 | Irrigation |
| Dammel Reservoir | Montana | Chouteau | 21 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Pozega Lake 1 | Montana | Granite | 21 | Low | Not Available | 1958 | Irrigation |
| Lockie #6 | Montana | Custer | 21 | Low | — | 1975 | Fire Protection, Stock, Or ... |
| Fred Burr Lake (Granite) | Montana | Granite | 21 | High | Satisfactory | 1930 | Water Supply |
| Knudson | Montana | Dawson | 21 | Low | — | 1958 | Fire Protection, Stock, Or ... |
| Halmans #2 | Montana | Fallon | 21 | Low | — | 1954 | Irrigation |
| Whitetail (Daniels) | Montana | Daniels | 21 | Low | — | 1930 | Irrigation |
| Schaffer #1 | Montana | Powder River | 21 | Low | — | 1961 | Fire Protection, Stock, Or ... |
| Homestead Retention Dam | Montana | Prairie | 21 | Low | Unsatisfactory | 1964 | Fire Protection, Stock, Or ... |
| Camp Detention Dam | Montana | Valley | 21 | Low | Unsatisfactory | 1954 | Flood Risk Reduction |
| Skeeter Detention Dam | Montana | Valley | 21 | Low | Unsatisfactory | 1964 | Flood Risk Reduction |
| Dondarlee #1 | Montana | Prairie | 21 | Low | — | 1948 | Fire Protection, Stock, Or ... |
| Br-43 Retention Dam | Montana | Blaine | 21 | Low | Not Rated | 1936 | Flood Risk Reduction |
| Goffena #2 | Montana | Petroleum | 21 | Low | — | 1953 | Fire Protection, Stock, Or ... |
| Lobella Detention Dam | Montana | Dawson | 21 | Low | Unsatisfactory | 1956 | Fire Protection, Stock, Or ... |
| Big Elk | Montana | Wheatland | 21 | Significant | — | 1927 | Irrigation |
| W Krutzfeldt #1 | Montana | Custer | 21 | Low | — | 1960 | Irrigation |
| Crow #3 | Montana | Big Horn | 21 | Low | Not Rated | 1950 | Fire Protection, Stock, Or ... |
| 71 Ranch (Bassett) | Montana | Rosebud | 21 | Low | — | 1971 | Fire Protection, Stock, Or ... |
| Nefsy #2 (Custer) | Montana | Custer | 21 | Low | — | 1966 | Fire Protection, Stock, Or ... |
| Kendrick#1 | Montana | Powder River | 21 | Low | — | 1949 | Irrigation |
| Baba Blacksheep | Montana | Chouteau | 21 | Low | — | 1903 | Fire Protection, Stock, Or ... |
| F Whitmus #2 | Montana | McCone | 21 | Low | — | 1966 | Fire Protection, Stock, Or ... |
| Billings #2 | Montana | Garfield | 21 | Low | — | 1967 | Fire Protection, Stock, Or ... |
| Gibbs, Gerold | Montana | Garfield | 21 | Low | — | 1969 | Fire Protection, Stock, Or ... |
| Mystic Dike | Montana | Stillwater | 21 | High | Satisfactory | 1927 | Hydroelectric |
| Mgdevlon Dam | Montana | Prairie | 21 | Low | Not Rated | — | |
| Fatzinger #2 | Montana | Richland | 21 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Crow #68 | Montana | Big Horn | 20 | 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.