§ 4-33. Areas zoned.
(a)
Airspace obstruction zones.
(1)
Airspace zones. 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 beneath the approach surfaces, transitional surfaces, horizontal surfaces and conical surfaces as they apply to the Ruston Regional Airport. 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:
a.
Large airplane runway 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 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.
b.
Transitional zones —The transitional zones are the areas beneath the transitional surfaces.
c.
Horizontal zone —The horizontal zone is 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.
d.
Conical zone —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.
(2)
Airspace zone height limitations. Except as otherwise provided in this article, no structure shall be erected, altered or maintained and no tree shall be allowed to grow in any zone created by this ordinance to a height in excess of the applicable limit herein established for such zone. Such applicable height limitations are hereby established for each of the zones in question as follows:
a.
Large airplane precision runway approach zone —Slopes 50 feet outward for each foot upward beginning at the end of and at the same elevation as the primary surface and extending to a horizontal distance of 10,000 feet along the extended runway centerline; thence slopes upward 40 feet outward for each foot upward to an additional horizontal distance of 40,000 feet along the extended runway centerline.
b.
Transitional zones —Slopes seven feet outward for each foot upward beginning at the sides of and at the same elevation as the primary surface and the approach surface and extending to a height of 150 feet above the airport elevation. In addition to the foregoing, there are established height limits sloping seven feet outward for each foot upward beginning at the sides of and at the same elevation as the approach surface and extending to where they intersect the conical surface. Transitional surfaces for those portions of the approach surface 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 right angles to the runway centerline.
c.
Horizontal zone —Established at 150 feet above the airport elevation.
d.
Conical zone —Slopes 20 feet outward for each foot upward beginning at the periphery of the horizontal zone and at 150 feet above the airport elevation and extending horizontally 4,000 feet to a height of 350 feet above the airport elevation.
e.
Excepted height limitations —Nothing in this article shall be construed as prohibiting the construction or maintenance of any structure or growth of any tree to a height up to 35 feet above the surface of the land.
(b)
Land use safety zones. In order to carry out the purpose of this article, as set forth above and also, in order to restrict those uses which may be hazardous to the operational safety of aircraft operating to and from the Ruston Regional Airport and furthermore to limit population and building density in the runway approach areas, thereby creating sufficient open space so as to protect life and property in case of an accident, there are hereby created and established the following land use safety zones:
(1)
Safety zone A: All land in that portion of the approach zones of a runway, as defined in subsection 4-33(a) hereof, which extends outward from the end of the primary surface a distance equal to two-thirds of the planned length of the runway, which distance shall be:
a.
4,333 feet for runway "18"—"36"
(2)
Safety zone B: All land in that portion of the approach zones of a runway, as defined in subsection 4-33(a) hereof, which extends outward from safety zone A, a distance equal to one-third of the planned length of the runway, which distance shall be:
a.
2,167 feet for runway "18"—"36".
(3)
Safety zone C: All that land which is enclosed within the perimeter of the horizontal zone, as defined in subsection 4-33(a) hereof, and which is not included in safety zone A or safety zone B.
(c)
Airport zoning map. The several zones herein established are shown on the Ruston Regional Airport Zoning Map consisting of two sheets, prepared by Alliance, Incorporated, and dated November 12, 2008, attached hereto and made a part hereof, which map, together with such amendments thereto as may from time to time be made, and all notations, references, elevations, data, zone boundaries and other information thereon, shall be and the same is hereby adopted as part of this article.
(Code 1961, § 13:52; Ord. No. 1586, § 3, 9-8-2009)
Editor's note
The airport zoning map is not set out herein, but is on file in the offices of the city.