In order to carry out the provisions of the ordinance codified in this chapter, there are created and established certain zones which include all of the land lying beneath the approach surfaces, transitional surfaces, horizontal surfaces, and conical surfaces as they apply to the Ankeny Regional Airport with an ultimate runway length of 5,500 feet for Runway 18/36 and 3,860 feet for Runway 4/22 as shown on the airport layout plan. Such zones are shown on the Ankeny Regional Airport zoning map consisting of one sheet, prepared by Polk County and the Polk County Aviation Authority which is attached to the ordinance codified in this chapter and made a part hereof. An area located in more than one of the following zones is considered to be only in the zone with the more restrictive height limitation. The various zones are established and defined as follows:
1. Utility Runway Visual Approach Zone. The inner edge of this approach zone coincides with the width of the primary surface and is 250 feet wide. The approach zone expands outward uniformly to a width of 1,250 feet at a horizontal distance of 5,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway. Refer to Section 201.01 of this chapter for the regulatory configuration of the Ankeny Regional Airport.
2. Utility Runway Non-Precision Instrument Approach Zone. The inner edge of this approach zone coincides with the width of the primary surface and is 500 feet wide. The approach zone expands outward uniformly to a width of 2,000 feet at a horizontal distance 5,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway.
3. Runway Larger Than Utility Visual Approach Zone. The inner edge of this approach zone coincides with the width of the primary surface and is 500 feet wide. The approach zone expands outward uniformly to a width of 1,500 feet at a horizontal distance of 5,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway.
4. Runway Larger Than Utility With a Visibility Minimum Greater Than Three-fourths Mile Non-Precision Instrument Approach Zone. The inner edge of this approach zone coincides with the width of the primary surface and is 500 feet wide. The approach zone expands outward uniformly to a width of 3,500 feet at a horizontal distance of 10,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway. Refer to Section 201.01 of this chapter for regulatory configuration of the Ankeny Regional Airport.
5. Runway Larger Than Utility With a Visibility Minimum as Low as Three-fourths Mile Non-Precision Instrument Approach Zone. The inner edge of this approach zone coincides with the width of the primary surface and is 1,000 feet wide. The approach zone expands outward uniformly to a width of 4,000 feet at a horizontal distance of 10,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway.
6. Precision Instrument Runway Approach Zone. The inner edge of this approach zone coincides with the width of the primary surface and is 1,000 feet wide. The approach zone expands outward uniformly to a width of 16,000 feet at a horizontal distance of 50,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway.
7. Transitional Zones. The transitional zones are the areas beneath the transitional surfaces. Refer to Section 201.01 of this chapter for regulatory configuration of the Ankeny Regional Airport.
8. Horizontal Zone. The horizontal zone is established by swinging arcs of 5,000 feet radii for all runways designated utility or visual and 10,000 feet for all others from the center of each end of the primary surface of each runway and connecting the adjacent arcs by drawing lines tangent to those arcs. The horizontal zone does not include the approach and transitional zones. Refer to Section 201.01 of this chapter for regulatory configuration of the Ankeny Regional Airport.
9. Conical Zones. The conical zone is established as the area that commences at the periphery of the horizontal zone and extends outward therefrom, a horizontal distance of 4,000 feet. Refer to Section 201.01 of this chapter for regulatory configuration of the Ankeny Regional Airport.
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