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No building, pipe, chimney, tower, steeple, stand, platform, pole, wire or structure or erection or object of natural growth, or obstruction of any kind or nature whatsoever, shall be built, placed, hung, or permitted to grow or allowed to be built, placed or hung which shall at any point or part thereof exceed the heights as provided in the zones established herein. Where an area is covered by more than one height limitation, the more restrictive limitations shall prevail. The restrictions shall apply to the area surrounding all runways and approaches situated thereon. The owner of any existing nonconforming building, structure, or object of natural growth shall be required to permit the installation, operation, and maintenance thereon of any markers and lights as deemed necessary by the airport authority or the FAA to indicate to operators of aircraft in the vicinity of the airport the presence of such airport obstruction. Such height limitations are hereby established for each zone as follows:

(1) Precision Instrument Approach Zone. Beginning at the end of and at the same elevations as the primary surface, slopes one foot in height for each 50 feet (50:1) in horizontal distance and extending to a distance of 10,200 feet from the end of the runway; thence one foot in height for each 40 feet in horizontal distance to a point 50,200 feet from the end of the runway;

(2) Nonprecision Instrument Approach Zone. Beginning at the end of and at the same elevations as the primary surface, slopes one foot in height for each 34 feet (34:1) in horizontal distance and extending to a distance of 10,200 feet from the end of the runway;

(3) Visual Approach Zones. Beginning at the end of and at the same elevation as the primary surface, slopes one foot in height for each 20 feet (20:1) in horizontal distance and extending to a point 10,200 feet from the end of the runway;

(4) Transition Zones. Slopes outward one foot in height for each seven feet (7:1) in horizontal distance beginning at the primary surface, extending to a height of 150 feet above the airport elevation, which is 410 feet above mean sea level. In addition to the foregoing, there are established height limits of one foot vertical height for each seven feet horizontal (7:1) distance measured from the edges of all approach zones for the entire length of the approach zones and extending upward and outward to the points where they intersect the horizontal or conical surfaces. Further, where the instrument approach zone projects through and beyond the conical zone, a height limit of one foot for each seven feet of horizontal distance shall be maintained, beginning at the edge of the instrument approach zone and extending a distance of 5,000 feet from the edge of the instrument approach zone measured normal to the centerline of the runway extended;

(5) Horizontal Zone. One hundred fifty feet above the airport elevation or a height of 560 feet above mean sea level;

(6) Conical Zone. Slopes outward one foot in height for each 20 feet (20:1) of horizontal distance beginning at the periphery of the horizontal zone, extending 4,000 feet to a height of 350 feet above the airport elevation or a height of 760 feet above mean sea level. [Ord. 4111 § 2, 2013; Code 1970 § 25.81.070.]