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 New Hanover County
 Code of Ordinances
 Appendix A. AIRPORT ZONING ORDINANCE

  § III. Zones.  

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  • In order to carry out the provisions of this ordinance, there are hereby created and established certain zones which include all of the land lying within the primary zones, instrument approach zones, noninstrument approach zones, transition zones, horizontal zone and conical zone. Such areas and zones are shown on the New Hanover County Airport Height Zoning Map dated December, 1971, which is attached to this ordinance and made a part hereof. The various zones are hereby established and defined as follows:

    (1)

    Primary zone. A surface longitudinally centered on the runway, extending 200 feet beyond the end of that runway (the end of the runway does not include any overruns or blast pads). The width of the primary zone is 1,000 feet for both precision instrument runways (23 and 34) and for category "D" non-precision instrument runways (5 and 16). This primary zone extends for a distance of 500 feet on either side of the runway centerline and at right angles thereto.

    (2)

    Instrument approach zone. A zone longitudinally centered on the extended runway centerline and extending outward and upward from each end of the primary zone. An approach zone is applied to each end of each runway based upon the type of approach available or planned for that runway end.

    (A)

    Precision instrument approach zone. The inner edge of the approach zone is the same width as the primary zone (1,000 feet) and it expands uniformly to a width of 16,000 feet. The approach zone extends for a horizontal distance of 50,000 feet beyond the primary zone, its centerline being a continuation of the centerline of the runway. This applies to existing precision instrument Runway 34 and to existing Runway 23 for future precision instrument status.

    (B)

    Non-precision instrument approach zone. This approach zone is used on runways in category "D" (visibility minimums as low as three-fourths mile). The inner edge of the approach zone is the same width as the primary zone (1,000 feet) and it expands uniformly to a width of 4,000 feet. The approach zone extends for a horizontal distance of 10,000 feet beyond the primary zone, its centerline being a continuation of the centerline of the runway. This applies to existing Runways 5 and 16.

    (3)

    Transitional zone. Transitional zones are established adjacent to the primary zone and approach zones as indicated on the zoning map. Transitional zones symmetrically located on either side of the primary zone and approach zones have variable widths as shown on the zoning map. These zones extend outward and upward at right angles to the runway centerline and the runway centerline extended at a slope of 7 to 1 from the sides of the primary zone and from the sides of the approach zones for their entire lengths. Within the confines of the periphery of the horizontal zone, the transitional zone extends at a slope of 7 to 1 until it has reached an elevation of 150 feet above the established airport elevation (intersects the horizontal zone). The transitional zone along the approach zones flare symmetrically along either side and slope outward and upward at a slope of 7 to 1 until they intersect the horizontal zone.

    Transitional zones for those portions of the precision instrument approach zone which project through and beyond the limits of the conical zone are parallel to the approach zone outer limits and extend a distance of 5,000 feet on each side of the approach zone as measured horizontally from the edge of the approach zone and at right angles to the runway centerline extended. These transitional zones intersect and are terminated, as shown on the airport height zoning map at the periphery of the conical zone.

    (4)

    Horizontal zone. A horizontal plan 150 feet above the established airport elevation, the periphery of which is constructed by swinging arcs of 10,000 feet in radii from the center of each end of the primary zone of each runway and connecting the adjacent arcs by lines tangent to those arcs.

    (5)

    Conical zone. A zone extending outward and upward from the periphery of the horizontal zone for a horizontal distance of 4,000 feet.