(A) In order to carry out the provisions of this chapter there are hereby created and established certain surfaces which include all of the land lying beneath the approach surfaces, transitional surfaces, horizontal surfaces, and conical surfaces as they apply to the Newton Municipal Airport. Such zones are shown on the Newton Municipal Airport Zoning Map which is attached to this Chapter and made a part hereof. An area located in more than one of the following surfaces is considered to be in only the zone with the more restrictive height limitation. Except as otherwise provided in this chapter, no structure shall be erected, altered or maintained, and no tree shall be allowed to grow in any surface created by this chapter to a height in excess of the applicable height limit herein established for such surface.
(B) The various surfaces and such height limitations are hereby established and defined as follows.
(1) Horizontal surface. The horizontal surface is a horizontal plane 150 feet above the established airport elevation, the perimeter of which is constructed by swinging arcs of 10,000 feet radii from the center of the end of the primary surface on each end of runway 14/32 and connecting the adjacent arcs by lines tangent to those arcs.
(2) Conical surface. The conical surface extends outward and upward from the periphery of the horizontal surface at a slope of 20:1 for a horizontal distance of 4,000 feet.
(3) Primary surface. The primary surface is a surface longitudinally centered on a runway and extends 200 feet beyond each end of that runway. 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 250 feet for runway 5/23 and the width is 1,000 feet on runway 14/32.
(4) Approach surface. The approach surface is a surface longitudinally centered on the extended runway centerline and extending outward and upward from each end of the primary surface. The inner edge of the approach surface is the same width as the primary surface and expands uniformly to a width of 1,250 feet for runway ends 5 and 23; 4,000 feet for runway end 14; and 16,000 feet for runway end 32. The approach surface extends for a horizontal distance of 5,000 at a slope of 20:1 for runway ends 5 and 23; 10,000 feet at a slope of 34:1 for runway end 14; and 10,000 feet at a slope of 50:1 with an additional 40,000 feet at a slope of 40:1 for runway end 32.
(5) Transitional surface. The transitional surface extends outward and upward at right angles to the runway centerline and the runway centerline extended at a slope of 7:1 from the sides of the primary surface and from the sides of the approach surfaces. Transitional surfaces for those portion of the precision approach surface which project through and beyond the limits of the conical surface, extend a distance of 5,000 feet measured horizontally from the edge of the approach surface and at right angles to the runway centerline.
(2011 Code, § 53.0103)