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 |
|---|---|---|---|---|---|---|---|
| Standish #5 | Montana | Rosebud | 22 | Low | — | 1959 | Fire Protection, Stock, Or ... |
| Lake Frances North Dam | Montana | Pondera | 22 | High | Satisfactory | 1909 | Irrigation |
| Crisafulli Lake | Montana | Dawson | 22 | High | Satisfactory | 1959 | Irrigation |
| 26n9e22 | Montana | Chouteau | 22 | Low | — | — | Water Supply |
| French #15 | Montana | Rosebud | 22 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| L Sayer-Magdalena | Montana | Roosevelt | 22 | Low | — | 1959 | Fire Protection, Stock, Or ... |
| Collins | Montana | Valley | 22 | Low | — | 1955 | Fire Protection, Stock, Or ... |
| Lee, S.A. #1 | Montana | Dawson | 22 | Low | — | 1963 | Irrigation |
| Lion Lake Dam | Montana | Flathead | 22 | High | Not Rated | 1948 | Recreation |
| T L Johnson #1 | Montana | Rosebud | 22 | Low | — | 1957 | Fire Protection, Stock, Or ... |
| B Shaw #1 | Montana | Petroleum | 22 | Low | — | 1947 | Irrigation |
| Khomeni | Montana | Phillips | 22 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Drum No 2 | Montana | Carbon | 22 | Low | — | 1950 | Irrigation |
| California Coulee | Montana | Hill | 22 | Low | — | 1955 | Flood Risk Reduction |
| Upper Glasston West Dam | Montana | Sweet Grass | 22 | High | Poor | 1912 | Irrigation |
| Big Bucks #5 | Montana | Garfield | 22 | Low | — | 1955 | Fire Protection, Stock, Or ... |
| Porta Reservoir No. 2 | Montana | Roosevelt | 22 | Significant | — | 1963 | Recreation |
| Big Bucks #8 | Montana | Garfield | 22 | Low | — | 1955 | Fire Protection, Stock, Or ... |
| Chocolate Milkshake | Montana | Garfield | 22 | Low | — | 1962 | Fire Protection, Stock, Or ... |
| Turnbull #1 | Montana | Powder River | 22 | Low | — | 1954 | Fire Protection, Stock, Or ... |
| R Garst #2 | Montana | Powder River | 22 | Low | — | 1953 | Irrigation |
| South Meadow Creek Dam | Montana | Madison | 22 | High | Not Available | 1968 | Irrigation |
| Sams #1 | Montana | Powder River | 22 | Low | — | 1944 | Irrigation |
| Ryan-Tronrud Dam | Montana | Sweet Grass | 22 | Significant | — | 1956 | Irrigation |
| Deep Cut Detention Dam | Montana | Valley | 22 | Low | Fair | 1960 | Fire Protection, Stock, Or ... |
| Weson | Montana | Valley | 22 | Low | — | 1951 | Irrigation |
| Carlton Lake #1 | Montana | Missoula | 22 | High | — | 1899 | Irrigation |
| Rattlesnake Dam | Montana | Dawson | 22 | Low | Satisfactory | 1962 | Fish and Wildlife Pond |
| L and L | Montana | Custer | 22 | Low | — | 1939 | Fire Protection, Stock, Or ... |
| Hofer 1 | Montana | Liberty | 22 | Low | — | 1977 | Irrigation |
| Hofer 2 | Montana | Toole | 22 | Low | — | 1977 | Irrigation |
| Taylor Fish (Fergus) | Montana | Fergus | 22 | Low | — | 1951 | Recreation |
| Mclean and Sons INCorporated #1 | Montana | Pondera | 22 | Low | — | 1948 | Fire Protection, Stock, Or ... |
| Colver | Montana | Fergus | 22 | Low | — | 1939 | Irrigation |
| Saylor Reservoir | Montana | Garfield | 22 | Low | — | 1965 | Fire Protection, Stock, Or ... |
| Antelope Creek Reservoir | Montana | McCone | 22 | Low | — | 1944 | Fire Protection, Stock, Or ... |
| Jones #4 | Montana | Custer | 22 | Low | — | 1945 | Fire Protection, Stock, Or ... |
| Bowman Lake 1 | Montana | Powell | 22 | Low | Not Available | 1958 | Irrigation |
| Wyrick | Montana | Fallon | 22 | Low | — | 1984 | Irrigation |
| Big Sky County Wastewater Pond3 | Montana | Gallatin | 22 | High | Not Rated | 1997 | Other |
| T-Diamond #1 | Montana | Custer | 22 | Low | — | 1961 | Fire Protection, Stock, Or ... |
| Danelson Reservoir | Montana | Daniels | 22 | Low | — | 1968 | Recreation |
| Apache Dam | Montana | Carter | 22 | Low | Satisfactory | — | Flood Risk Reduction |
| Iverson Retention Dam | Montana | Petroleum | 22 | Low | Poor | 1968 | Flood Risk Reduction |
| Gregg #1 | Montana | Garfield | 22 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Ninemile Dam Lake #1 | Montana | Hill | 22 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Creedman Coulee Dam | Montana | Hill | 22 | Low | Fair | 1938 | Fish and Wildlife Pond |
| Chinook, North | Montana | Blaine | 22 | Low | — | 1910 | Irrigation |
| Judy Detention Dam | Montana | Valley | 22 | Low | Satisfactory | 1960 | Fire Protection, Stock, Or ... |
| Moccasin Detention Dam | Montana | Valley | 22 | Low | Unsatisfactory | 1957 | 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.