Name: Dams

Display Field: Dam_name

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: Regulated dams in Hawaii as of April 2025. Source: DLNR Engineering Branch, April 10, 2025. 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, REFERENCED ABOVE. 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.pdfor contact Hawaii Statewide GIS Program, Office of Planning and Sustainable Development, State of Hawaii; PO Box 2359, Honolulu, Hi. 96804; (808) 587-2846; email: gis@hawaii.gov; Website: https://planning.hawaii.gov/gis.

Copyright Text: Department of Natural Resources, Flood Control and Dam Safety Section, Dam Safety Unit; Hawaii Statewide GIS Program

Default Visibility: false

MaxRecordCount: 5000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 421682.7597000003
YMin: 2132032.3122000005
XMax: 878023.4791000001
YMax: 2454990.961100001
Spatial Reference: 102202  (3750)

Drawing Info:

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Description: N/A
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• objectid ( type: esriFieldTypeOID, alias: OBJECTID )
• shape ( type: esriFieldTypeGeometry, alias: Shape )
• dam_name ( type: esriFieldTypeString, alias: DAM_NAME, length: 4000 )
• dam_former_name ( type: esriFieldTypeString, alias: DAM_FORMER_NAME, length: 4000 )
• longitude ( type: esriFieldTypeDouble, alias: LONGITUDE )
• latitude ( type: esriFieldTypeDouble, alias: LATITUDE )
• county ( type: esriFieldTypeString, alias: COUNTY, length: 4000 )
• owner_name ( type: esriFieldTypeString, alias: OWNER_NAME, length: 4000 )
• owner_type ( type: esriFieldTypeString, alias: OWNER_TYPE, length: 4000 )
• dam_designer ( type: esriFieldTypeString, alias: DAM_DESIGNER, length: 4000 )
• dam_type ( type: esriFieldTypeString, alias: DAM_TYPE, length: 4000 )
• core ( type: esriFieldTypeString, alias: CORE, length: 4000 )
• foundation ( type: esriFieldTypeString, alias: FOUNDATION, length: 4000 )
• purposes ( type: esriFieldTypeString, alias: PURPOSES, length: 4000 )
• year_completed ( type: esriFieldTypeInteger, alias: YEAR_COMPLETED )
• year_modified ( type: esriFieldTypeString, alias: YEAR_MODIFIED, length: 4000 )
• dam_length ( type: esriFieldTypeInteger, alias: DAM_LENGTH )
• dam_height ( type: esriFieldTypeString, alias: DAM_HEIGHT, length: 256 )
• structural_height ( type: esriFieldTypeString, alias: STRUCTURAL_HEIGHT, length: 256 )
• hydraulic_height ( type: esriFieldTypeString, alias: HYDRAULIC_HEIGHT, length: 256 )
• nid_height ( type: esriFieldTypeString, alias: NID_HEIGHT, length: 256 )
• normal_storage ( type: esriFieldTypeString, alias: NORMAL_STORAGE, length: 256 )
• nid_storage ( type: esriFieldTypeString, alias: NID_STORAGE, length: 256 )
• surface_area ( type: esriFieldTypeDouble, alias: SURFACE_AREA )
• drainage_area ( type: esriFieldTypeDouble, alias: DRAINAGE_AREA )
• inspection_frequency ( type: esriFieldTypeInteger, alias: INSPECTION_FREQUENCY )
• spillway_type ( type: esriFieldTypeString, alias: SPILLWAY_TYPE, length: 4000 )
• spillway_width ( type: esriFieldTypeDouble, alias: SPILLWAY_WIDTH )
• number_of_locks ( type: esriFieldTypeInteger, alias: NUMBER_OF_LOCKS )
• length_of_locks ( type: esriFieldTypeInteger, alias: LENGTH_OF_LOCKS )
• source_agency ( type: esriFieldTypeString, alias: SOURCE_AGENCY, length: 4000 )
• state ( type: esriFieldTypeString, alias: STATE, length: 4000 )
• submit_date ( type: esriFieldTypeDate, alias: SUBMIT_DATE, length: 8 )
• url_address ( type: esriFieldTypeString, alias: URL_ADDRESS, length: 4000 )
• inspection_date ( type: esriFieldTypeDate, alias: INSPECTION_DATE, length: 8 )
• record_id ( type: esriFieldTypeInteger, alias: Record ID )
• other_dam_names ( type: esriFieldTypeString, alias: Other Dam Names, length: 4000 )
• state_or_federal_agency_id ( type: esriFieldTypeString, alias: State or Federal Agency ID, length: 4000 )
• nid_id ( type: esriFieldTypeString, alias: NID ID, length: 4000 )
• number_separate_structures ( type: esriFieldTypeString, alias: Number Separate Structures, length: 4000 )
• other_structure_id ( type: esriFieldTypeString, alias: Other Structure ID, length: 4000 )
• river_or_stream ( type: esriFieldTypeString, alias: River or Stream, length: 4000 )
• nearest_downstream_city_town ( type: esriFieldTypeString, alias: Nearest Downstream City/Town, length: 4000 )
• distance_to_nearest_city_town ( type: esriFieldTypeDouble, alias: Distance to Nearest City/Town )
• non_federal_dam_on_federal_prop ( type: esriFieldTypeString, alias: Non-Federal Dam On Federal Property, length: 4000 )
• maximum_discharge ( type: esriFieldTypeString, alias: Maximum Discharge, length: 256 )
• maximum_storage ( type: esriFieldTypeString, alias: Maximum Storage, length: 256 )
• downstream_hazard_potential ( type: esriFieldTypeString, alias: Downstream Hazard Potential, length: 4000 )
• emergency_action_plan ( type: esriFieldTypeString, alias: Emergency Action Plan, length: 4000 )
• date_of_last_revision_of_emerge ( type: esriFieldTypeDate, alias: Date of Last Revision of Emergency Action Plan, length: 8 )
• condition_assessment ( type: esriFieldTypeString, alias: Condition Assessment, length: 4000 )
• condition_assessment_date ( type: esriFieldTypeDate, alias: Condition Assessment Date, length: 8 )
• volume_of_dam ( type: esriFieldTypeString, alias: Volume of Dam, length: 4000 )
• lock_width ( type: esriFieldTypeInteger, alias: Lock Width )
• permitting_authority ( type: esriFieldTypeString, alias: Permitting Authority, length: 4000 )
• inspection_authority ( type: esriFieldTypeString, alias: Inspection Authority, length: 4000 )
• enforcement_authority ( type: esriFieldTypeString, alias: Enforcement Authority, length: 4000 )
• state_jurisdictional_dam ( type: esriFieldTypeString, alias: State Jurisdictional Dam, length: 4000 )
• state_regulated_dam ( type: esriFieldTypeString, alias: State Regulated Dam, length: 4000 )
• state_regulatory_agency ( type: esriFieldTypeString, alias: State Regulatory Agency, length: 4000 )
• federal_agency_involvement_in_f ( type: esriFieldTypeString, alias: Federal Agency Involvement in Funding, length: 4000 )
• federal_agency_involvement_in_d ( type: esriFieldTypeString, alias: Federal Agency Involvement in Design, length: 4000 )
• federal_agency_involvement_in_c ( type: esriFieldTypeString, alias: Federal Agency Involvement in Construction, length: 4000 )
• federal_agency_involvement_in_r ( type: esriFieldTypeString, alias: Federal Agency Involvement in Regulatory, length: 4000 )
• federal_agency_involvement_in_i ( type: esriFieldTypeString, alias: Federal Agency Involvement in Inspection, length: 4000 )
• federal_agency_involvement_in_o ( type: esriFieldTypeString, alias: Federal Agency Involvement in Operation, length: 4000 )
• federal_agency_owner ( type: esriFieldTypeString, alias: Federal Agency Owner, length: 4000 )
• federal_agency_involvement___ot ( type: esriFieldTypeString, alias: Federal Agency Involvement - Other, length: 4000 )
• congressional_representative ( type: esriFieldTypeString, alias: Congressional Representative, length: 4000 )
• congressional_representative_pa ( type: esriFieldTypeString, alias: Congressional Representative Party, length: 4000 )
• congressional_representative_di ( type: esriFieldTypeString, alias: Congressional Representative District, length: 4000 )
• operational_status ( type: esriFieldTypeString, alias: Operational Status, length: 4000 )
• operational_status_date ( type: esriFieldTypeDate, alias: Operational Status Date, length: 8 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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