(A) In order to carry out the provisions of this chapter, there are created and established certain surfaces and areas which include all of the land lying beneath the noise sensitive area, approach surfaces, transitional surfaces, horizontal surfaces, and conical surfaces as they apply to the Marion Municipal Airport. Such surfaces are shown on Marion Municipal Airport Imaginary Surfaces Map, Airport Height Restrictions Map, and Airport Noise Sensitive Area Map consisting of three sheets, and dated May 10, 2010 which is attached to this chapter and is made a part hereof. For height limitation purposes, an area located in more than one of the following surfaces is considered to be only in the surface with the more restrictive height limitation.
(B) The various surfaces are established and defined as follows.
(1) Utility runway visual approach surface. The inner edge of this approach surface coincides with the width of the primary surface and is 500 feet wide. The approach surface 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.
(2) Utility runway nonprecision instrument approach surface. The inner edge of this approach surface coincides with the width of the primary surface and is 500 feet wide. The approach surface 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 surface. The inner edge of this approach surface coincides with the width of the primary surface and is 500 feet wide. The approach surface 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 runway.
(4) Runway larger than utility with a visibility minimum greater than 3/4 mile nonprecision instrument approach surface. The inner edge of this approach surface coincides with the width of the primary surface and is 500 feet wide. The approach surface 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 runway.
(5) Runway larger than utility with a visibility minimum as low as 3/4 mile nonprecision instrument approach surface. The inner edge of this approach surface coincides with the width of the primary surface and is 1,000 feet wide. The approach surface 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 surface. The inner edge of this approach surface coincides with the width of the primary surface and is 1,000 feet wide. The approach surface 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) Heliport approach surface. The inner edge of this approach surface coincides with the width of the primary surface and is 100 feet wide. The approach surface expands outward uniformly to a width of 500 feet at a horizontal distance of 4,000 feet from the primary surface.
(8) Transitional surface. These surfaces extend outward at 90 degree angles to the runway centerline and 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 surfaces for those portions of the precision approach surfaces, 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 90 degree angles to the extended runway centerline.
(9) Heliport transitional surface. These surfaces extend outward from the sides of the primary surface and the heliport approach surface a horizontal distance of 250 feet from the primary surface and centerline and the heliport approach surface centerline.
(10) Horizontal surface. A horizontal plane 150 feet above the established airport elevation, the perimeter of which in is constructed by swinging 10,000 feet arcs from the center of the each end of the primary surface of each runway and connecting the adjacent arcs by lines tangent to those arcs. The horizontal surface does not include the approach and transitional surfaces.
(11) Conical surface. The conical surface is established as the area that commences at the periphery of the horizontal surface and extends outward and upward at a slope of 20 to one for a horizontal distance of 4,000 feet.
(12) Noise sensitive area. An area lying 1,500 feet on either side of the centerline and the extended centerline of a runway for a distance of one nautical mile from the boundaries of any public use airport.
(1985 Code, § 36-7-4-600(4.8)) (Am. Ord. 19-2010, passed 10-19-2010)