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.

Clear
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.