§ 26-589. Airport zones.

In order to carry out the provisions of this division, 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 Acadiana Regional Airport Hazard Zoning Map consisting of one sheet, prepared by Hudgins, Thompson, Ball and Associates, and dated May 5, 1976, which is attached to Parish Ordinance No. 321 and made a part of this division by reference. 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:

(1)

Runway larger than utility with visibility minimum greater than three-fourths mile non-precision-instrument approach zone. The inner edge of this approach zone coincides with the width of the primary surface and is 500 feet wide. The approach zone expands outward uniformly to a width of 3,500 feet at a horizontal distance of 10,000 feet from the primary surface, its centerline being the continuation of the centerline of the runway.

(2)

Precision-instrument runway 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 being the continuation of the centerline of the runway.

(3)

Heliport visual flight rules (VFR) approach zone. The inner edge of this approach zone coincides with the width of the primary surface and is 250 feet wide. The approach zone expands outward uniformly to a width of 500 feet at a horizontal distance of 4,000 feet from the primary surface, its centerline being the continuation of the centerline of the primary surface.

(4)

Heliport instrument flight rules (IFR) approach zone. The inner edge of this approach zone coincides with the width of the primary surface and is 300 feet wide. The approach zone expands outward uniformly to a width of 3,400 feet at a horizontal distance of 10,000 feet from the primary surface, its centerline being the continuation of the centerline of the primary surface.

(5)

Transitional zones. These zones are hereby established as the area beneath the transitional surfaces. These surfaces extend outward and upward at 90-degree angles to the runway centerline and the runway centerline extended 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 at 90-degree angles to the extended runway centerline.

(6)

Heliport VFR transitional zones. These zones extend outward from the sides of the primary surface and the approach zones a horizontal distance of 250 feet from the primary surface centerline and the extended primary surface centerline.

(7)

Heliport IFR transitional zones. These zones extend outward from the sides of the primary surface and a portion of the sides of the approach zones a horizontal distance of 350 feet from the primary surface centerline and the extended primary surface centerline.

(8)

Horizontal zone. 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 the transitional zones.

(9)

Conical zone. 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. The conical zone does not include the precision-instrument approach zones and the transitional zones.

(Ord. No. 321 (Par.), § III, 9-14-78)