Browse Dams
1,534 dams in the National Inventory of Dams.
National Inventory of Dams
Browse 1,534 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 |
|---|---|---|---|---|---|---|---|
| Napa Valley Lake | California | Napa | 40 | Low | Satisfactory | 1990 | Other |
| Ler Kinney Lake | California | Alpine | 40 | Low | Satisfactory | 1926 | Water Supply |
| Mary Street | California | Riverside | 40 | High | Satisfactory | 1981 | Flood Risk Reduction |
| Riviera Reservoir | California | Los Angeles | 40 | High | Satisfactory | 1962 | Water Supply |
| Upper Franklin Dam | California | Los Angeles | 40 | Significant | Not Available | 1915 | Flood Risk Reduction |
| Potrero | California | Los Angeles | 40 | High | Satisfactory | 1967 | Other |
| Halsey Afterbay | California | Placer | 40 | High | Satisfactory | 1913 | Hydroelectric |
| Green Valley Lake | California | Solano | 40 | High | Satisfactory | 1956 | Water Supply |
| Fay Gunby | California | El Dorado | 40 | High | Satisfactory | 1961 | Water Supply |
| Pigeon Pass | California | Riverside | 40 | High | Satisfactory | 1958 | Flood Risk Reduction |
| Lower Pond / Pond 1 | California | Sacramento | 40 | High | Not Available | - | Water Supply |
| Lower Blue Lake | California | Alpine | 40 | Low | Poor | 1885 | Hydroelectric |
| Collett | California | Lassen | 40 | Significant | Satisfactory | 1991 | Hydroelectric |
| Lake County Sanitation District | California | Lake | 40 | High | Satisfactory | 1972 | Water Supply |
| Bean Holl #3 | California | San Mateo | 40 | Low | Poor | 1939 | Water Supply |
| Rubicon Main | California | El Dorado | 40 | Low | Satisfactory | 1963 | Hydroelectric |
| Las Tablas Creek | California | San Luis Obispo | 40 | Low | Poor | 1961 | Other |
| Upper Sand Creek Detention Basin | California | Contra Costa | 40 | High | Satisfactory | 2014 | Flood Risk Reduction |
| San Joaquin No. 3 Forebay | California | Madera | 40 | Low | Fair | 1906 | Hydroelectric |
| Patterson | California | Alameda | 39 | High | Fair | 1962 | Water Supply |
| Schadler | California | Modoc | 39 | Low | Satisfactory | 1967 | Other |
| Burns | California | Napa | 39 | Significant | Satisfactory | 1956 | Water Supply |
| Graham | California | Lake | 39 | Low | Satisfactory | 1959 | Water Supply |
| Mendocino Middle | California | Mendocino | 39 | High | Poor | 1908 | Other |
| Araujo Reservoir No. 1 | California | Napa | 39 | High | Fair | 1950 | Other |
| Ler Howell | California | Santa Clara | 39 | Significant | Satisfactory | 1877 | Water Supply |
| Boron Tails Pond 6 | California | Kern | 39 | Low | Satisfactory | 1980 | Water Supply |
| Winchester | California | Placer | 39 | Significant | Satisfactory | 1999 | Water Supply |
| Montana Lake | California | Napa | 39 | Low | Satisfactory | 2009 | Other |
| Linda Vista | California | Napa | 39 | Significant | Satisfactory | 1959 | Water Supply |
| Lake Helen | California | Sonoma | 39 | High | Poor | 1966 | Water Supply |
| Summit Reservoir | California | San Francisco | 39 | High | Satisfactory | 1954 | Water Supply |
| Fleming Hill No. 2 | California | Solano | 39 | High | Satisfactory | 1912 | Water Supply |
| Sleepy Holl No. 2 | California | Sonoma | 39 | High | Satisfactory | 1949 | Water Supply |
| Eastfoot Retarding Basin | California | Orange | 39 | High | Satisfactory | 2007 | Flood Risk Reduction |
| Heenan Lake | California | Alpine | 39 | Low | Satisfactory | 1929 | Water Supply |
| Grizzly Creek | California | Plumas | 39 | High | Satisfactory | 1915 | Other |
| Penn Valley Wastewater | California | Nevada | 39 | Low | Satisfactory | 1990 | Water Supply |
| Green Oaks #1 | California | San Mateo | 39 | Low | Satisfactory | 1936 | Other |
| Holiday Lake | California | El Dorado | 39 | Significant | Satisfactory | 1951 | Water Supply |
| Fuller Lake | California | Nevada | 39 | Low | Satisfactory | 1856 | Hydroelectric |
| San Diego Reservoir | California | Tuolumne | 39 | High | Satisfactory | 1860 | Water Supply |
| Spring Valley Ranch | California | Placer | 39 | High | Satisfactory | 1958 | Other |
| Auburn Valley Country Club #3 | California | Placer | 39 | Low | Satisfactory | 1959 | Water Supply |
| Upper Peak Lake | California | Placer | 39 | High | Satisfactory | 1850 | Hydroelectric |
| Thermalito Afterbay | California | Butte | 39 | High | Fair | 1967 | Water Supply |
| Goffinet | California | Amador | 38 | High | Satisfactory | 1954 | Other |
| Reservoir No. 4 | California | Los Angeles | 38 | High | Satisfactory | 1955 | Water Supply |
| Big Four Ranch | California | Kern | 38 | Significant | Satisfactory | 1970 | Water Supply |
| E. A. Wright | California | Glenn | 38 | Significant | Satisfactory | 1950 | Water Supply |
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.