§ 62-2202. Airport zones.

In order to carry out the provisions of this subdivision, there are hereby created and established certain zones, which include all of the land and airspace lying within the approach zone, transitional zones, horizontal zones and conical zones as they apply to a particular airport. Such zones are shown on the airport hazard zoning maps, which are made a part of this subdivision by reference. The airport hazard zoning maps are on file with the county. 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)

Utility runway visual approach zone. This zone underlies an approach surface, the inner edge of which is 250 feet wide and coincides with the end of the primary surface. It expands outward uniformly to a width of 1,250 feet at a horizontal distance of 5,000 feet measured along the extended centerline of the runway. The approach surface slopes upward from the inner edge at the rate of 20 feet horizontally for each foot vertically.

(2)

Utility runway non-precision-instrument approach zone. This zone underlies an approach surface, the inner edge of which is 500 feet wide and coincides with the end of the primary surface. It expands outward uniformly to a width of 2,000 feet at a horizontal distance of 5,000 feet measured along the extended centerline of the runway. The approach surface slopes upward from the inner edge at the rate of 20 feet horizontally for each foot vertically.

(3)

Runway larger than utility visual approach zone. This zone underlies an approach surface, the inner edge of which is 500 feet wide and coincides with the end of the primary surface. It expands outward uniformly to a width of 1,500 feet at a horizontal distance of 5,000 feet measured along the extended centerline of the runway. The approach surface slopes upward from the inner edge at the rate of 20 feet horizontally for each foot vertically.

(4)

Runway larger than utility with visibility minimum greater than three-fourths mile non-precision-instrument approach zone. This zone underlies an approach surface, the inner edge of which is 500 feet wide and coincides with the end of the primary surface. It expands outward uniformly to a width of 3,500 feet at a horizontal distance of 10,000 feet measured along the extended centerline of the runway. The approach surface slopes upward from the inner edge at the rate of 34 feet horizontally for each foot vertically.

(5)

Runway larger than utility with visibility minimum as low as three-fourths mile non-precision-instrument approach zone. This zone underlies an approach surface, the inner edge of which is 1,000 feet wide and coincides with the end of the primary surface. It expands outward uniformly to a width of 4,000 feet at a horizontal distance of 10,000 feet measured along the extended centerline of the runway. The approach surface slopes upward from the inner edge at the rate of 34 feet horizontally for each foot vertically.

(6)

Precision instrument runway approach zone. This zone underlies an approach surface, the inner edge of which is 1,000 feet wide and coincides with the end of the primary surface. It expands outward uniformly to a width of 16,000 feet at a horizontal distance of 50,000 feet measured along the extended centerline of the runway. The approach surface slopes upward from the inner edge at the rate of 50 feet horizontally for each foot vertically for a horizontal distance of 10,000 feet and thence 40 feet horizontally to each foot vertically for the remaining length of the control zone.

(7)

Heliport visual flight rules (VFR) approach zone. This zone underlies an approach surface, the inner edge of which coincides with the width of the primary surface. It expands outward to a width of 500 feet at a horizontal distance of 4,000 feet measured along the extended centerline of the primary surface. The approach surface slopes upward from the inner edge at the rate of eight feet horizontally for each foot vertically.

(8)

Heliport instrument flight rules (IFR) approach zone. This zone underlies an approach surface, the inner edge of which is 300 feet wide and coincides with the width of the primary surface. It expands outward to a width of 3,400 feet at a horizontal distance of 10,000 feet measured along the extended centerline of the primary surface. The approach surface slopes upward from the inner edge at the rate of 15 feet horizontally for each foot vertically.

(9)

Stol precision instrument approach zone. This zone underlies an approach surface, the inner edge of which is 300 feet wide and coincides with the width of the primary surface. It expands outward to a width of 3,400 feet at a horizontal distance of 10,000 feet measured along the extended centerline of the primary surface. The approach surface slopes upward from the inner edge at the rate of 15 feet horizontally for each foot vertically.

(10)

Transitional zones. These zones underlie the transitional surfaces which extend outward and upward at 90-degree angles to the runway centerline and 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. Where the precision runway approach surface projects beyond the limits of the conical surface, the transitional surface shall continue upward and outward from the approach surface at the rate of seven feet horizontally to one foot vertically for a horizontal distance of 5,000 feet measured at 90-degree angles to the extended runway centerline.

(11)

Heliport VFR transitional zones. These zones underlie transitional surfaces which slope upward and outward two feet vertically for each foot horizontally beginning at the sides of the primary surface and the approach surfaces and extending a distance of 250 feet measured horizontally from and at 90 degrees to the primary surface centerline and extended centerline.

(12)

Heliport IFR transitional zones. These zones underlie transitional surfaces which slope upward and outward four feet vertically for each foot horizontally beginning at the sides of the primary surface and the approach surfaces and extending a distance of 350 feet measured horizontally from and at 90 degrees to the primary surface centerline and extended centerline.

(13)

Stol precision instrument transitional zones. These zones underlie the transitional surfaces which begin at the sides of the primary surface and slope upward and outward four feet horizontally and one foot vertically for a horizontal distance of 400 feet and slope upward and outward four feet horizontally for each foot vertically from the sides of the approach zones a variable horizontal distance of 400 feet at the primary surface end to zero feet at a horizontal distance of 1,500 feet measured outward along the extended primary surface centerline.

(14)

Horizontal zone. This zone underlies a horizontal surface having an elevation of 150 feet above the airport elevation. The horizontal dimensions of the surface are established by swinging arcs having a radius of 5,000 feet for all runways designated as utility or visual, or 10,000 feet for all others, 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.

(15)

Conical zone. This zone underlies a conical surface which commences at the periphery of the horizontal zone and extends upward and outward 20 feet horizontally for each foot vertically for a distance of 4,000 feet.

(Code 1979, § 14-20.18(B); Ord. No. 97-49, § 22, 12-9-97)