<div class="chunk-title">Sec. 8-18. - Airport zones.</div>
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               In order to carry out the provisions of this article, there are hereby created and
               established certain zones which include all of the land lying within the approach
               zones, transitional zones, horizontal zones, and conical zones as they apply to a
               particular airport. Such zones are shown on the field hazard zoning map. 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 hereby established and
               defined as follows:
               
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                  (1)
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                  <span class="ital">Precision instrument runway approach zone.</span> 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.
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                  (2)
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                  <span class="ital">Runway larger than utility with a visibility minimum as low as three-fourths mile
                     nonprecision instrument approach zone.</span> 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.
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                  (3)
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                  <span class="ital">Transitional zones.</span> These zones are hereby established as the area beneath the transitional surfaces.
                  These surfaces extend outward and upward beginning 500 feet each side of the runway
                  centerline at a slope of 7:1 to the primary surface. The runway centerline extended
                  at a slope of seven feet horizontally for each foot vertically from the sides of the
                  primary and approach surfaces to where they intersect the horizontal and conical surfaces.
                  Transitional zones for those portions of the precision approach zones 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 zones and at 90-degree angles
                  to the extended runway centerline.
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                  (4)
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                  <span class="ital">Horizontal zone.</span> The horizontal zone is hereby established by swinging arcs of 10,000 feet radii 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.
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               <p class="incr1">
                  (5)
                  </p>
               		
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                  <span class="ital">Conical zone.</span> The conical zone is hereby established as the area that commences at the periphery
                  of the horizontal zone and extends outward therefrom a horizontal distance of 4,000
                  feet at a slope of 20:1. The conical zone does not include the precision instrument
                  approach zones and the transitional zones.
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               (Ord. of 5-21-2001, art. I, Â§ 2)
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