A. Airspace Zones:
In order to carry out the purpose of this Ordinance, as set forth above, the following air space zones are hereby established: Primary Zone, Horizontal Zone, Conical Zone, Approach Zone, and Transitional Zone, and whose locations and dimensions are as follows:
1. PRIMARY ZONE: All that land which lies directly under an imaginary primary surface longitudinally centered on a runway and:
a. Extending two hundred (200) feet beyond each end of Runway 13-31 and future Runway 18-36.
b. Coinciding with each end of existing Runway 18-36 until the runway is decommissioned. At that point, there shall be no primary zone for existing Runway 18-36.
The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline. The width of the primary surface is:
c. Five hundred (500) feet for Runway 13-31.
d. Two hundred fifty (250) feet for future Runway 18-36.
e. Two hundred fifty (250) feet for existing Runway 18-36 until the runway is decommissioned. At that point, there shall be no primary zone for existing Runway 18-36.
2. HORIZONTAL ZONE: All that land which lies directly under an imaginary horizontal surface one hundred fifty (150) feet above the established airport elevation, or a height of 1,272.9 feet above mean sea level, the perimeter of which is constructed by swinging arcs of specified radii from the center of each end of the primary surface of each runway and connecting the adjacent arcs by lines tangent to those arcs. The radius of each arc is:
a. Ten thousand (10,000) feet for Runway 13-31.
b. Five thousand (5,000) feet for future Runway 18-36.
c. Five thousand (5,000) feet for existing Runway 18-36 until the runway is decommissioned. At that point, there shall be no horizontal zone for existing Runway 18-36.
When a five thousand (5,000)-foot arc is encompassed by tangents connecting two adjacent ten thousand (10,000)-foot arcs, the five thousand (5,000)-foot arc shall be disregarded in the construction of the perimeter of the horizontal surface.
3. CONICAL ZONE: All that land which lies directly under an imaginary conical surface extending upward and outward from the periphery of the horizontal surface at a slope of 20:1 for a horizontal distance of four thousand (4,000) feet as measured outward from the periphery of the horizontal surface.
4. APPROACH ZONE: All that land which lies directly under an imaginary approach surface longitudinally centered on the extended centerline at each end of a runway. The inner edge of the approach surface is at the same width and elevation as, and coincides with, the end of the primary surface. The approach surface inclines upward and outward at a slope of:
a. 34:1 for Runway 13-31.
b. 20:1 for future Runway 18-36.
c. 20:1 for existing Runway 18-36 until the runway is decommissioned. At that point, there shall be no approach zone for existing Runway 18-36.
The approach surface expands uniformly to a width of:
a. Three thousand five hundred (3,500) feet for Runway 13-31 at a distance of ten thousand (10,000) feet, then continues at the same rate of divergence to the periphery of the conical surface.
b. One thousand two hundred fifty (1,250) feet for future Runway 18-36 at a distance of five thousand (5,000) feet, then continues at the same rate of divergence to the periphery of the conical surface.
c. One thousand two hundred fifty (1,250) feet for existing Runway 18-36 at a distance of five thousand (5,000) feet, then continues at the same rate of divergence to the periphery of the conical surface until the runway is decommissioned. At that point, there shall be no approach surface for existing Runway 18-36.
5. TRANSITIONAL ZONE: All that land which lies directly under an imaginary surface extending upward and outward at right angles to the runway centerline and centerline extended at a slope of 7:1 from the sides of the primary surfaces and from the sides of the approach surfaces until they intersect the horizontal surface or the conical surface. Transitional surfaces for those portions of the precision instrument approach surface which project through and beyond the limits of the conical surface, extend a distance of five thousand (5,000) feet measured horizontally from the edge of the precision instrument approach surface and at right angles to the extended precision instrument runway centerline.
B. HEIGHT RESTRICTIONS: Except as otherwise provided in this Ordinance, and except as necessary and incidental to airport operations, no structure or tree shall be constructed, altered, maintained, or allowed to grow in any air space zone created in SECTION IV A so as to project above any of the imaginary air space surface described in said SECTION IV A hereof. Where an area is covered by more than one height limitation, the more restrictive limitation shall prevail.
C. BOUNDARY LIMITATIONS: The air space obstruction height zoning restrictions set forth in this section shall apply for a distance not to exceed one and one half (1-1/2) miles beyond the perimeter of the airport boundary and in that portion of an airport hazard area under the approach zone for a distance not exceeding two miles from the airport boundary.
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