Layer: HDOT Airports - Airspace 10 Foot Contours (ID: 11)

Name: HDOT Airports - Airspace 10 Foot Contours

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Description: 10 Foot Contours Depicting Hawaii Department of Transportation Airports FAA Part 77 Surface Elevations in Mean Sea Level Feet. Source: Ricondo, Consultant to Hawaii DOT Airports Division. The DOT-Airports is providing the 14 CFR Part 77 Surfaces (often referred to as “Part 77 Surfaces”) for all its airports in GIS raster format for information and planning purposes only. This data is intended to assist the public in understanding Part 77 surfaces and engaging early in proposals against Federal Aviation Administration (FAA) regulations and local land use ordinances, if applicable. In administering 14 CFR Part 77, the prime objectives of the FAA are to promote air safety and efficient use of navigable airspace. To accomplish this mission, aeronautical studies are conducted based on information provided by proponents on a FAA Form 7460-1, Notice of Proposed Construction or Alteration. The requirements for filing with the FAA for proposed construction or alteration of existing structures vary based on several factors such as height, proximity to an airport, location, and frequencies emitted from the structure, etc. For more details, please refer to 14 CFR Part 77.9. The airspace contours are given in feet above mean sea level at a given point. The Part 77 Surfaces may vary significantly throughout a proposed project site boundary. Therefore, a thorough evaluation of the Part 77 Surfaces over the entire project site should be conducted to ensure all proposed buildings/structures are within allowable height limits. The ground elevation at a proposed site must be determined and subtracted from the airspace contour value to determine the maximum height of a building/structure at a given point at ground level. Regardless if the proposed construction or alteration of existing structure is below the Part 77 Surfaces, developers are still required to file a FAA Form 7460-1 to obtain FAA’s official determination at the HDOT and/or FAA’s request. A copy of FAA’s determination letter should be forwarded to the HDOT Airports Planning Section. For additional information, please refer to metadata at https://files.hawaii.gov/dbedt/op/gis/data/HDOTA_AirportAirspaceContours.pdf or contact the 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: Hawaii Department of Transportation, Airports Division; Hawaii Statewide GIS Program

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contour ( type: esriFieldTypeString, alias: Contour, length: 255 )
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