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 |
|---|---|---|---|---|---|---|---|
| Venn #9 | Montana | Custer | 17 | Low | — | 1966 | Fire Protection, Stock, Or ... |
| Lone Tree | Montana | Phillips | 17 | Low | — | 1946 | Irrigation |
| Mcferran #2 | Montana | Big Horn | 17 | Low | — | 1928 | Fire Protection, Stock, Or ... |
| Schindal Battle I | Montana | Meagher | 17 | Low | — | 1920 | Irrigation |
| Big Timber Livestock #1 | Montana | Treasure | 17 | Low | — | 1956 | Fire Protection, Stock, Or ... |
| B O'Leary #2 | Montana | Yellowstone | 17 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Bertino | Montana | Roosevelt | 17 | Low | — | 1937 | Fire Protection, Stock, Or ... |
| Ghost #5 | Montana | Valley | 17 | Low | — | 1953 | Fire Protection, Stock, Or ... |
| R Garst #1 | Montana | Powder River | 17 | Low | — | 1954 | Fire Protection, Stock, Or ... |
| Engdahl #5 | Montana | Garfield | 17 | Low | — | 1940 | Fire Protection, Stock, Or ... |
| Offerdahl-Johnson Dam | Montana | Phillips | 17 | Low | — | 1980 | Irrigation |
| Sibra | Montana | Chouteau | 17 | Low | — | 1960 | Irrigation |
| R Downs #4 | Montana | Big Horn | 17 | Low | — | 1950 | Irrigation |
| Thora #2 | Montana | McCone | 17 | Low | — | 1946 | Fire Protection, Stock, Or ... |
| Karen #5 | Montana | Garfield | 17 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Adams #3 | Montana | Rosebud | 17 | Low | — | 1952 | Fire Protection, Stock, Or ... |
| Bill Christensen Dam | Montana | Sanders | 17 | Low | — | 1976 | Irrigation |
| Murion,Jim J. #2 | Montana | Garfield | 17 | Low | — | 1950 | Irrigation |
| J-K-Boyd #1 | Montana | Rosebud | 17 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Ester Lake (Phillips) | Montana | Phillips | 17 | Significant | — | 1954 | Irrigation |
| Venn #8 | Montana | Custer | 17 | Significant | — | 1970 | Fire Protection, Stock, Or ... |
| Bar G9 #2 | Montana | Rosebud | 17 | Low | — | 1950 | Fire Protection, Stock, Or ... |
| Leo Bergtoll Irrigation Dam | Montana | Valley | 17 | Low | — | 1981 | Irrigation |
| Cloudy Dam | Montana | Blaine | 17 | Low | Not Rated | — | |
| Robert Johnson | Montana | Richland | 17 | Low | — | 1937 | Fire Protection, Stock, Or ... |
| Ernie #1 Dam | Montana | Musselshell | 17 | Low | Not Rated | — | Flood Risk Reduction |
| R C Mothershead #1 | Montana | McCone | 17 | Low | — | 1942 | Irrigation |
| Sambo #1 Dam | Montana | Phillips | 17 | Low | Not Rated | — | |
| Little Bitterroot | Montana | Flathead | 17 | High | Not Available | 1917 | Irrigation |
| Little Bear/Us #37 Dam | Montana | Petroleum | 17 | Low | Poor | — | Irrigation |
| Bugs Detention Dam | Montana | Valley | 17 | Low | Not Rated | 1977 | Flood Risk Reduction |
| Silver Lake West Dam | Montana | Deer Lodge | 17 | High | Fair | 1918 | Irrigation |
| Fort Belknap No. 16 | Montana | Phillips | 17 | Low | Not Rated | — | |
| Script Detention Dam | Montana | Valley | 17 | Low | Fair | 1957 | Fire Protection, Stock, Or ... |
| Vr-77 Retention Dam | Montana | Valley | 17 | Low | Poor | 2003 | Fire Protection, Stock, Or ... |
| Arrambide Detention Dam X | Montana | Valley | 17 | Low | Fair | 1957 | Fire Protection, Stock, Or ... |
| Pr-161 Retention Dam | Montana | Phillips | 17 | Low | Not Rated | 1937 | Fire Protection, Stock, Or ... |
| Br-45 Retention Dam | Montana | Blaine | 17 | Low | Not Rated | 1937 | Flood Risk Reduction |
| Pr-11 Retention Dam | Montana | Phillips | 17 | Low | Not Rated | 1942 | Flood Risk Reduction |
| Frazer East Dike | Montana | Valley | 17 | Low | Not Rated | 1913 | Fire Protection, Stock, Or ... |
| Lonesome | Montana | Phillips | 16 | Low | — | 1946 | Fire Protection, Stock, Or ... |
| Split | Montana | Garfield | 16 | Low | — | 1952 | Fire Protection, Stock, Or ... |
| Fillafer #1 | Montana | Rosebud | 16 | Low | — | 1937 | Irrigation |
| Wilke Dam | Montana | Phillips | 16 | Low | — | 1912 | Fire Protection, Stock, Or ... |
| Fisher Reservoir | Montana | Garfield | 16 | Low | — | 1960 | Fire Protection, Stock, Or ... |
| Neptune | Montana | Teton | 16 | Low | — | 1920 | Fire Protection, Stock, Or ... |
| Whatshisname | Montana | Valley | 16 | Low | — | 1909 | Irrigation |
| Hook #9 | Montana | Rosebud | 16 | Low | — | 1945 | Irrigation |
| Reed #4 | Montana | Custer | 16 | Low | — | 1952 | Irrigation |
| Thebes Lake | Montana | Rosebud | 16 | Low | — | 1913 | Other |
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.