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 |
|---|---|---|---|---|---|---|---|
| Weson | Montana | Valley | 22 | Low | - | 1951 | Irrigation |
| Lion Lake Dam | Montana | Flathead | 22 | High | Not Rated | 1948 | Recreation |
| Gregg #1 | Montana | Garfield | 22 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Us #25 | Montana | Garfield | 22 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Big Sky County Wastewater Pond3 | Montana | Gallatin | 22 | High | Not Rated | 1997 | Other |
| Sams #1 | Montana | Powder River | 22 | Low | - | 1944 | Irrigation |
| L and L | Montana | Custer | 22 | Low | - | 1939 | Fire Protection, Stock, Or ... |
| Saylor Reservoir | Montana | Garfield | 22 | Low | - | 1965 | Fire Protection, Stock, Or ... |
| T-Diamond #1 | Montana | Custer | 22 | Low | - | 1961 | Fire Protection, Stock, Or ... |
| Apache Dam | Montana | Carter | 22 | Low | Satisfactory | - | Flood Risk Reduction |
| Hofer 1 | Montana | Liberty | 22 | Low | - | 1977 | Irrigation |
| Christensen #6 | Montana | Custer | 22 | Low | - | 1961 | Fire Protection, Stock, Or ... |
| Hofer 2 | Montana | Toole | 22 | Low | - | 1977 | Irrigation |
| Judy Detention Dam | Montana | Valley | 22 | Low | Satisfactory | 1960 | Fire Protection, Stock, Or ... |
| B Shaw #1 | Montana | Petroleum | 22 | Low | - | 1947 | Irrigation |
| Colver | Montana | Fergus | 22 | Low | - | 1939 | Irrigation |
| Peace Pond | Montana | Ravalli | 22 | High | Satisfactory | 1960 | Irrigation |
| Moccasin Detention Dam | Montana | Valley | 22 | Low | Unsatisfactory | 1957 | Fire Protection, Stock, Or ... |
| Wyrick | Montana | Fallon | 22 | Low | - | 1984 | Irrigation |
| Tarawa Retention Dam | Montana | Phillips | 22 | Low | Poor | 1947 | Fire Protection, Stock, Or ... |
| Crisafulli Lake | Montana | Dawson | 22 | High | Satisfactory | 1959 | Irrigation |
| Bethel #11 | Montana | Petroleum | 22 | Low | - | 1957 | Fire Protection, Stock, Or ... |
| Deep Cut Detention Dam | Montana | Valley | 22 | Low | Fair | 1960 | Fire Protection, Stock, Or ... |
| Big Bucks #13 | Montana | Garfield | 22 | Low | - | 1960 | Fire Protection, Stock, Or ... |
| Jones #1 | Montana | Custer | 22 | Low | - | 1949 | Fire Protection, Stock, Or ... |
| Ninemile Dam Lake #1 | Montana | Hill | 22 | Low | - | 1940 | Fire Protection, Stock, Or ... |
| C Smith #1 | Montana | Powder River | 22 | Low | - | 1964 | Fire Protection, Stock, Or ... |
| French #9 | Montana | Custer | 22 | Low | - | 1947 | Fire Protection, Stock, Or ... |
| Big Bucks #5 | Montana | Garfield | 22 | Low | - | 1955 | Fire Protection, Stock, Or ... |
| Big Bucks #10 | Montana | Garfield | 22 | Low | - | 1955 | Fire Protection, Stock, Or ... |
| Brown #4 | Montana | Garfield | 22 | Low | - | 1964 | Fire Protection, Stock, Or ... |
| Schlesinger #5 | Montana | Rosebud | 22 | Low | - | 1952 | Irrigation |
| Upper Glasston West Dam | Montana | Sweet Grass | 22 | High | Poor | 1912 | Irrigation |
| Chinook, North | Montana | Blaine | 22 | Low | - | 1910 | Irrigation |
| Karen #3 | Montana | Garfield | 22 | Low | - | 1974 | Irrigation |
| Schlesinger #7 | Montana | Rosebud | 22 | Low | - | 1952 | Irrigation |
| Standish #5 | Montana | Rosebud | 22 | Low | - | 1959 | Fire Protection, Stock, Or ... |
| Alexander | Montana | Garfield | 22 | Low | - | 1938 | Fire Protection, Stock, Or ... |
| Rieger | Montana | Fallon | 21 | Significant | - | 1958 | Irrigation |
| Big Elk | Montana | Wheatland | 21 | Significant | - | 1927 | Irrigation |
| Holzhey | Montana | Sweet Grass | 21 | Low | - | 1956 | Irrigation |
| Knudson | Montana | Dawson | 21 | Low | - | 1958 | Fire Protection, Stock, Or ... |
| Homestead Retention Dam | Montana | Prairie | 21 | Low | Unsatisfactory | 1964 | Fire Protection, Stock, Or ... |
| Half Barrel Detention Dam | Montana | Valley | 21 | Low | Unsatisfactory | 1956 | Fire Protection, Stock, Or ... |
| Lobella Detention Dam | Montana | Dawson | 21 | Low | Unsatisfactory | 1956 | Fire Protection, Stock, Or ... |
| Pr-110 Retention Dam | Montana | Phillips | 21 | Low | Not Rated | 1936 | Fire Protection, Stock, Or ... |
| 71 Ranch (Bassett) | Montana | Rosebud | 21 | Low | - | 1971 | Fire Protection, Stock, Or ... |
| Weigand Reservoir East | Montana | Phillips | 21 | High | Not Rated | - | |
| Baba Blacksheep | Montana | Chouteau | 21 | Low | - | 1903 | Fire Protection, Stock, Or ... |
| Gibbs, Gerold | Montana | Garfield | 21 | Low | - | 1969 | 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.