In order to carry out the provisions of this chapter, there are hereby created and established certain zones which include all of the land lying within the noninstrument approach zone, transition zone, horizontal zone and conical zone. Such areas and zones are shown on the McCall Municipal Airport zoning map consisting of an airport vicinity map with topographic contours, one sheet, prepared by Philip Marshall, civil engineer, and dated February 14, 1974, which is attached to the ordinance codified herein, and made a part hereof. The various zones are hereby established and defined as follows:
A. Visual Approach Zone: A visual approach zone shall have a width of two hundred fifty feet (250') at a distance of two hundred feet (200') beyond each end of the runway, widening thereafter uniformly to a width of one thousand two hundred fifty feet (1,250') at a distance of five thousand feet (5,000') beyond each end of the runway, its centerline being the continuation of the centerline of the runway, and has a slope of twenty to one (20:1).
B. Transitional Zone: These zones extend outward and upward at right angles to the runway centerline and the runway centerline extended at a slope of seven to one (7:1) from the sides of the primary zone and from the sides of the approach zones.
C. Horizontal Zone: A horizontal plane one hundred fifty feet (150') above the established airport elevation, the perimeter of which is constructed by swinging arcs of specified radii from the center of each end of the primary zone of each runway of each airport and connecting the adjacent arcs by lines tangent to those arcs. The radius of each arc is five thousand feet (5,000') for all runways designated as utility or visual. The radius of the arc specified for each end of the runway will have the same arithmetical value.
D. Conical Zone: A zone extending outward and upward from the periphery of the horizontal zone at a slope of twenty to one (20:1) for a horizontal distance of four thousand feet (4,000').
E. Primary Zone: A zone longitudinally centered on a runway. When the runway has a specially prepared hard surface, the primary zone extends two hundred feet (200') beyond each end of that runway; but when the runway has no specially prepared hard surface, the primary zone ends at each end of the runway. The elevation of any point on the primary zone coincides with the elevation of the nearest point on the runway centerline. The width of a primary zone is two hundred fifty feet (250') for utility runways having only visual approaches.
F. 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.
1. The inner edge of the approach zone is the same width as the primary zone and it expands uniformly to a width of one thousand two hundred fifty feet (1,250') for that end of a utility runway with only visual approaches.
2. The approach zone for utility runways with a visual approach extends for a horizontal distance of five thousand feet (5,000') at a slope of twenty to one (20:1).
3. The outer width of an approach zone to an end of a runway will be that width prescribed in this subsection for the most precise approach existing or planned for that runway. (Ord. 74-4, 10-15-1974)