In order to carry out the provisions of this subchapter, there are hereby created and established certain zones for existing and future planned airport conditions as they apply to the Bonner County airport. The zones include all the land lying within the primary zones, approach zones, transitional zones, horizontal zones and conical zones. Such zones are shown on the approved Sandpoint airport master plan 1993-2013, as amended from time to time, which by this reference is incorporated and made a part hereof as if set forth in full. Whenever the zoning map shows zones for future planned airport improvements, the more stringent future planned zones govern. Their limitations and boundaries shall be adapted for present zoning purposes. The various zones are hereby established and defined as follows:
A. Utility Runways Nonprecision Instrument Approach Zones: The inner edge of this approach zone coincides with the width of the primary surface and is five hundred feet (500') wide. The approach zone expands outward uniformly to a width of two thousand feet (2,000') at a horizontal distance five thousand feet (5,000') from the primary surface, its centerline being the continuation of the centerline of the runway.
B. Transitional Zones: These zones are hereby established as the area beneath the transitional surfaces. These surfaces extend outward and upward at ninety degree (90o) angles to the runway centerline and the runway centerline extended at a slope of seven feet (7') horizontally for each foot vertically from the sides of the primary and approach surfaces to which they intersect in the horizontal conical surfaces.
C. Horizontal Zone: The horizontal zone is hereby established by swinging arcs of five thousand feet (5,000') 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 primary, approach and transitional zones.
D. Conical Zone: The conical zone is hereby established as the area that commences at the periphery of the horizontal zone and extends outward there from the horizontal distance of four thousand feet (4,000'). The conical zone does not include the precision instrument approach zones and the transitional zones. (Ord. 501, 11-18-2008)