(A) In order to carry out the purposes of this chapter, the following airspace zones are hereby established: primary zone, horizontal zone, conical zone, approach zone, and transitional zone.
(B) The locations and dimensions of these zones are as follows:
(1) Primary zone. All that land which lies directly under an imaginary primary surface longitudinally centered on a runway and extending 200 feet beyond each end of the NW-SE runway. The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway center line. The width of the primary surface is 500 feet for the NW-SE runway;
(2) Horizontal zone. All that land which lies directly under an imaginary horizontal surface 100 feet above the established airport elevation, or a height of 1,200 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 6,000 feet for the NW-SE runway;
(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 4,000 feet as measured radially 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 center line 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 40:1 for the NW-SE runway. The approach surface expands uniformly to a width of 2,500 feet for the NW-SE runway at a distance of 10,000 feet, then continues at the same rate of divergence to the periphery of the conical surface; and
(5) Transitional zone. All that land which lies directly under an imaginary surface extending upward and outward at right angles to the runway center line and the runway center line 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.
(Ord. passed 8-6-75)