1358-18 Airport Zoning (revising Ordinance 996-07)

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q OR BK 9716 PG 1960 5 of 13 determine if a structure requires a Form 7460-1 submittal. Where an area is covered by more than one height limitation under this section, the more restrictive limitation shall prevail. The imaginary surfaces are established and defined as follows: (1) Primary Surface (Zone): An area longitudinally centered on a runway, extending 200 feet beyond each end of that runway. The width of the primary surface is for the most precise approach existing or planned for either end of that runway as follows: Runways 5 and 23: 500 feet for Non-Precision-Instrument Runways having visibility iminimums greater than three-fourths statute mile. Runways 1 and 19: 1,000 feet for Precision Instrument Runways having visibility minimums less than three-fourths statute mile. No Structure or Obstruction will be permitted within the primary surface(zone)that is not a critical part of the airfield and is of a greater height than the nearest point on the runway centerline. (2) Horizontal Surface (Zone): A horizontal plan 150 feet 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 surface of each runway and connecting the adjacent arcs by lines tangent to those arcs. The radius of each arc is: Runways 5, 23, 1, and 19: 10,000 feet for all runways not designated as visual or utility. The radius of the arc specified for each end of a runway will have the same arithmetical value. That value will be the highest composite value determined for either end of the runway. When a 5,000-foot arc is encompassed by tangents connecting two adjacent 10,000-foot arcs, the 5,000- foot arc shall be disregarded on the construction of the perimeter of the horizontal zone. (3) Conical Surface (Zone): The area extending outward and upward from the periphery of the horizontal surface slope of 20 to 1 for a horizontal surface for a distance of 4,000 feet. Height limitations for Structures in the conical surface are 150 feet above Airport Elevation at the inner boundary with permitted height increasing one foot vertically for every 20 feet of horizontal distance measured outward from the inner boundary to a height of 350 feet above Airport Height at the outer boundary. (4) Approach Surface (Zone): An area longitudinally centered on the extended runway centerline and extending outward from each end of the primary surface. An approach surface is designated for each runway based upon the type of approach available or planned for that runway end. The inner edge of the approach surface is the same width as the primary surface and it expands uniformly to a width of: Runways 1 and 19 (precision instrument runways): 16,000 feet. Runways 5 and 23: 3,500 feet for that end of a Non-Precision-Instrument Runway other than utility,having visibility minimums greater than three-fourths of a statute mile. The approach surface extends for a horizontal distance of: Runways -1=and-.19.(precision instrument-runways): 50,000 feet. The-:height increases 1 foot vertically for every 50 feet of horizontal distance for the first 10,000 feet, and then increases 1 foot vertically for every 40 feet horizontal distance for an additional 40,000 feet. Runways 5 and 23: 10,000 feet with a height increasing 1 foot vertically for every 34 feet of horizontal distance for all Non-Precision-Instrument Runways other than utility. 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 end. (5) Transitional Surface (Zone): The area extending outward and upward at right angles to the runway centerline and the runway centerline extended at a slope of 7 to 1 from the 5