Dams

[Metadata] Regulated dams in Hawaii as of May 2026. Source: DLNR Engineering Branch, May 12, 2026. This data is continuously updated by the State of Hawaii Dam Safety Program at https://dams.hawaii.gov. It can also be found on the National Inventory of Dams (NID): https://nid.sec.usace.army.mil/#/. FOR THE MOST CURRENT INFORMATION, PLEASE VISIT THE dam safety website. For attribute definitions, please see https://files.hawaii.gov/dbedt/op/gis/data/NID_Hawaii_DataDictionary_20231127.pdf. For more information, please see metadata at https://files.hawaii.gov/dbedt/op/gis/data/dams_nid.pdf or contact Hawaii Statewide GIS Program, Office of Planning and Sustainable Development, State of Hawaii; PO Box 2359, Honolulu, Hi. 96804; [phone]; email: [e-mail]; Website: https://planning.hawaii.gov/gis.