BOCC Ordinance - 2021 Annual Docket

Home Browse Search

Nonprecision Instrument Approach Zone. The 500-foot inner edge coincides with the width of the primary surface and slopes 20 feet or 34 feet outward for each one foot upward beginning at the end of and at the same elevation as the primary surface and expands to a width of 2,000 or 3,500 feet at a horizontal distance of 5,000 feet or 10,000 feet along the extended runway centerline. The variable surface widths noted in this section are determined based on “Utility” or “Larger than Utility” FAR Part 77 designations assigned to each runway. Precision Instrument Approach Zone. The 1,000-foot inner edge of this approach zone coincides with the width of the primary surface and slopes 50 feet outward for each one foot upward for the first 10,000 feet of this zone and 40 feet outward for each one foot upward for the remaining 40,000 feet of this zone. The zone begins at the end of and at the same elevation as the primary surface. The approach zone expands 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 as depicted on map "A". Note: The precision instrument approach zone does not currently apply to for the group of airports included in this section. Transitional Zones. This zone is defined by a slope seven feet outward for each one foot upward beginning at the sides of, and at the same elevation as the primary surface and the approach surfaces, measured at 90-degree angles to the runway centerline, and extending to a height of 150 feet above the airport elevation (horizontal zone), which varies by airport. Where the precision instrument runway approach zone projects beyond the conical zone, no object shall penetrate the imaginary line created by a slope seven feet outward for each one foot upward beginning at the sides of and the same elevation as the approach surface, and extending a horizontal distance of 5,000 feet measured at 90-degree angles to the extended runway centerline. Note: The precision instrument approach zone transitional surface does not currently apply to for the group of airports included in this section. Height Restrictions: No object shall penetrate the imaginary line created by a slope seven feet outward for each one foot upward beginning at the sides of and the same elevation as the primary surface or approach surfaces, and extending to where they connect to the horizontal zone. Horizontal Zone. The zone is established at 150 feet above the airport elevation (varies by airport) by swinging arcs of 5,000 feet for all runway ends designated utility or visual, and 10,000 feet for all other runways, from the intersection of the extended runway centerline and the end of the primary surface for each runway and connecting adjacent arcs by drawing lines tangent to those arcs. The horizontal zone does not include the approach and transitional zones. Height Restrictions: No object shall penetrate the imaginary horizontal line created at 150 feet above the airport elevation. Conical Zone. The conical zone is established as the area that commences at the periphery of the horizontal zone and extends outward there from for a horizontal distance of 4,000 feet as depicted in map "A". Height Restrictions: No objects shall penetrate the imaginary line created by a slope 20 feet Moved up [1]: Its centerline is the continuation of the runway centerline as depicted on map "A". Deleted: This zone is defined by a slope seven feet outward for each one 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 which is 139 feet above mean sea level. Formatted: Border: : (No border) Formatted: Indent: Left: 0.31", No bullets or numbering Deleted: The zone is established at 150 feet above the airport elevation by swinging arcs of 5,000 feet radial for all runways designated utility or visual and 10,000 feet for all other runways from the centers of the primary surface of each runway and connecting adjacent arcs by drawing lines tangent to those arcs. The horizontal zone does not include the approach and transitional zones. Deleted: The established airport elevations for airports in Kittitas County are as follows: - Kittitas County Airport (Bowers Field) at 1,916 feet above mean sea level - Easton State Airport at 2,221 feet above mean sea level - DeVere Field at 1,838 feet above mean sea level - Cle Elum Municipal at 1,945 feet above mean sea level Deleted: