Browse Dams
125 dams in the National Inventory of Dams.
National Inventory of Dams
Browse 125 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 |
|---|---|---|---|---|---|---|---|
| Alexander | Hawaii | Kauai | 141 | High | Fair | 1931 | Hydroelectric |
| Puu Lua Reservoir | Hawaii | Kauai | 110 | High | Unsatisfactory | 1925 | Fish and Wildlife Pond |
| Wahiawa Dam | Hawaii | Honolulu | 98 | High | Poor | 1906 | Irrigation |
| Ku Tree Reservoir | Hawaii | Honolulu | 90 | High | Unsatisfactory | 1925 | Other |
| Kaneohe Dam | Hawaii | Honolulu | 83 | High | Fair | 1980 | Flood Risk Reduction |
| Aepo Reservoir | Hawaii | Kauai | 74 | High | Fair | 1901 | Irrigation |
| Nuuanu Dam No. 4 | Hawaii | Honolulu | 73 | High | Fair | 1910 | Flood Risk Reduction |
| Opaeula 01 Reservoir | Hawaii | Honolulu | 71 | High | Fair | 1910 | Irrigation |
| Koolau Reservoir | Hawaii | Honolulu | 70 | Low | Unsatisfactory | 1919 | Other |
| Horner Reservoir | Hawaii | Maui | 70 | High | Poor | 1926 | Irrigation |
| Mimino Reservoir | Hawaii | Kauai | 69 | High | Poor | 1920 | Irrigation |
| Waimanalo 60 Mg Reservoir | Hawaii | Honolulu | 65 | High | Fair | 1993 | Irrigation |
| Waikoloi Reservoir | Hawaii | Kauai | 64 | High | Poor | 1958 | Irrigation |
| Kahoma Reservoir | Hawaii | Maui | 60 | High | Poor | 1918 | Irrigation |
| Kahana Nui Dam | Hawaii | Maui | 58 | High | Poor | 1984 | Flood Risk Reduction |
| Kualapuu Reservoir | Hawaii | Maui | 58 | High | Fair | 1969 | Irrigation |
| Piwai Reservoir | Hawaii | Kauai | 56 | High | Poor | 1916 | Irrigation |
| Waikoloa Reservoir No. 3 | Hawaii | Hawaii | 54 | High | Fair | 1985 | Water Supply |
| Kahakapao Reservoirs | Hawaii | Maui | 54 | High | Poor | 1990 | Water Supply |
| Kapaia Reservoir | Hawaii | Kauai | 53 | High | Poor | 1910 | Irrigation |
| Waimea 60 Mg Reservoir | Hawaii | Hawaii | 52 | High | Poor | 1957 | Irrigation |
| Wailuku Water Reservoir 10 | Hawaii | Maui | 52 | High | Unsatisfactory | 1951 | Irrigation |
| Upper Helemano Reservoir | Hawaii | Honolulu | 51 | High | Poor | 1912 | Irrigation |
| Kaneha Reservoir | Hawaii | Kauai | 51 | High | Poor | 1910 | Irrigation |
| Honokowai - Structure #8 | Hawaii | Maui | 50 | High | Fair | 1995 | Flood Risk Reduction |
| Ipuolono Reservoir | Hawaii | Kauai | 50 | High | Poor | 1910 | Irrigation |
| Kaupale Reservoir | Hawaii | Kauai | 50 | High | Poor | 1910 | Irrigation |
| Twin Reservoirs | Hawaii | Kauai | 49 | High | Unsatisfactory | 1920 | Other |
| Papuaa Reservoir | Hawaii | Kauai | 48 | High | Poor | 1914 | Irrigation |
| Ioleau Reservoir | Hawaii | Kauai | 48 | Low | Poor | 1902 | Irrigation |
| Kumano Reservoir | Hawaii | Kauai | 48 | High | Poor | 1902 | Irrigation |
| Maui Reservoir 40 | Hawaii | Maui | 47 | High | Fair | 1926 | Irrigation |
| Huinawai Reservoir | Hawaii | Kauai | 47 | High | Poor | 1902 | Irrigation |
| Pauwela Reservoir | Hawaii | Maui | 47 | High | Poor | 1904 | Irrigation |
| Kaloko Reservoir | Hawaii | Kauai | 46 | High | Poor | 1890 | Irrigation |
| Manuhonuhonu Reservoir | Hawaii | Kauai | 45 | High | Poor | 1954 | Irrigation |
| Peahi Reservoir | Hawaii | Maui | 45 | High | Poor | 1924 | Irrigation |
| Waikoloa Reservoir No. 1 | Hawaii | Hawaii | 44 | High | Poor | 1970 | Water Supply |
| Haiku Reservoir | Hawaii | Maui | 43 | High | Unsatisfactory | 1904 | Irrigation |
| Napili 2-3 Desilting Basin | Hawaii | Maui | 43 | High | Fair | 1988 | Flood Risk Reduction |
| Piiholo 50 Mg Reservoir | Hawaii | Maui | 42 | High | Unsatisfactory | 1971 | Water Supply |
| Maui Reservoir 20 | Hawaii | Maui | 42 | High | Poor | 1913 | Irrigation |
| Olinda Reservoir | Hawaii | Maui | 42 | High | Poor | 1918 | Water Supply |
| Aepoeha Reservoir | Hawaii | Kauai | 42 | High | Fair | 1913 | Irrigation |
| Puu Opae Reservoir | Hawaii | Kauai | 41 | Low | Unsatisfactory | 1930 | Irrigation |
| Pa Aalii Reservoir | Hawaii | Hawaii | 40 | High | Fair | 1940 | Other |
| Aepoekolu Reservoir | Hawaii | Kauai | 40 | High | Poor | 1910 | Irrigation |
| Halenanahu Reservoir | Hawaii | Kauai | 40 | High | Unsatisfactory | 1920 | Irrigation |
| Kepani Reservoir | Hawaii | Kauai | 40 | High | Poor | 1954 | Irrigation |
| Maui Reservoir 15 | Hawaii | Maui | 39 | High | Poor | 1917 | Irrigation |
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.