(A) Airspace zones. In order to carry out the purposes of this subchapter, the following airspace zones are hereby established: Primary Zone, Horizontal Zone, Conical Zone, Approach Zone, and Transitional Zone, and whose locations and dimensions are as follows.
(1) Primary Zone.
(a) All that land which lies directly under an imaginary primary surface longitudinally centered on a runway and:
1. Extending 200 feet beyond each end of Runway 12/30; and
2. Coinciding with each end of Runway 4/22.
(b) The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline. The width of the primary surface is:
1. Five hundred feet for Runway 12/30; and
2. Two hundred fifty feet for Runway 4/22.
(2) Horizontal Zone. All that land which lies directly under an imaginary horizontal surface 150 feet above the established airport elevation, or a height of 1,227.3 feet above mean sea level, 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 feet from all runways.
(3) Conical Zone. All that land which lies directly under an imaginary conical surface extending upward and outward from the periphery of the horizontal surface at a slope of 20:1 for a horizontal distance of 4,000 feet.
(4) Approach Zone.
(a) All that land which lies directly under an imaginary approach surface longitudinally centered on the extended centerline at each end of a runway. The inner edge of the approach surface is at the same width and elevation as, and coincides with, the end of the primary surface. The approach surface inclines upward and outward at a slope of:
1. 40:1 for Runway 12/30; and
2. 20:1 for Runway 4/22.
(b) The approach surface expands uniformly to a width of:
1. 3,500 feet for Runway 12/30 at a distance of 10,000 feet to the periphery of the conical surface;
2. 2,250 feet for Runway 4/22 at a distance of 10,000 feet to the periphery of the conical surface.
(5) Transitional Zone. All that land which lies directly under an imaginary transitional surface extending upward and outward at right angles to the runway centerline and the runway centerline extended at a slope of 7:1 from the sides of the primary surfaces and from the sides of the approach surfaces until they intersect the horizontal surface or the conical surface.
(B) Height restrictions. Except as otherwise provided in this subchapter, and except as necessary and incidental to airport operations, no structure or tree shall be constructed, altered, maintained, or allowed to grow in any airspace zone created in division (A) above so as to project above any of the imaginary airspace surfaces described in division (A) above. Where an area is covered by more than one height limitation the more restrictive limitation shall prevail.
(C) Boundary limitations. The municipality may regulate height restriction zoning for a distance not to exceed one and one-half miles beyond the perimeter of the airport boundary.
(Prior Code, § 151.123) (Ord. 162, passed 6-5-1984)