As used in this chapter, unless the context otherwise requires, the following terms shall have the meanings ascribed to them in this section:
AIRPORT: The St. Maries airport.
AIRPORT ELEVATION: The highest point of an airport's usable landing area measured in feet from mean sea level.
AIRPORT HAZARD: Any structure or object of natural growth located on or in the vicinity of a public airport, or any use of land near such airport, which obstructs the airspace required for the flight of aircraft in landing or take off at such airport or is otherwise hazardous to such landing or take off of aircraft.
APPROACH SURFACE: A surface longitudinally centered on the extended runway centerline and extending outward and upward at a slope of twenty feet (20') horizontally for each foot vertically, for a distance of five thousand feet (5,000') beginning at the end of the primary surface. The width of the approach surface expands uniformly from two hundred fifty feet (250') wide at the end of the primary surface to one thousand two hundred fifty feet (1,250') wide at the distance of five thousand feet (5,000') from the end of the primary surface.
APPROACH, TRANSITIONAL, HORIZONTAL, AND CONICAL ZONES: These zones apply to the area under the approach, transitional, horizontal, and conical surfaces defined herein.
BOARD OF ADJUSTMENT: A board consisting of three (3) members appointed by the Benewah County commissioners as provided in section 7-1-9 of this chapter.
CONICAL SURFACE: A surface extending outward and upward at a slope of twenty feet (20') horizontally for each foot vertically, beginning at the periphery of the horizontal surface and extending a horizontal distance of four thousand feet (4,000').
HEIGHT: For the purpose of determining the height limits in all zones set forth in this chapter and shown on the zoning map, the datum shall be mean sea level elevation unless otherwise specified.
HORIZONTAL SURFACE: A horizontal plane one hundred fifty feet (150') above the established airport elevation, the perimeter of which is constructed by swinging arcs of five thousand foot (5,000') radii from the center of each end of the primary surface and connecting the adjacent arcs by lines tangent to those arcs.
NONCONFORMING USE: Any preexisting structure, object of natural growth, or use of land which is inconsistent with the provisions of this chapter or an amendment thereto.
PERSON: An individual, firm, partnership, corporation, company, association, joint stock association, or governmental entity. It includes a trustee, receiver, assignee, or similar representative of any of them.
PRIMARY SURFACE: A surface longitudinally centered on a runway. The primary surface extends two hundred feet (200') beyond each end of that runway. The width of the primary surface is two hundred fifty feet (250'). The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline.
RUNWAY: A defined area on an airport prepared for landing and take off of aircraft along its length.
STRUCTURE: An object constructed or installed by man, including, but without limitation, buildings, towers, smokestacks, earth formations, and overhead transmission lines.
TRANSITIONAL SURFACE: A surface extending outward and upward at right angles to the runway centerline at a slope of seven feet (7') horizontally for each foot vertically beginning at the sides of the primary surface and the sides of the approach surfaces, and ending where it penetrates the horizontal surface.
TREE: Any object of natural growth.
UTILITY RUNWAY: A runway that is constructed for and intended to be used by propeller driven aircraft of twelve thousand five hundred (12,500) pounds maximum gross weight and less.
VISUAL RUNWAY: A runway intended solely for the operation of aircraft using visual approach procedures with no straight-in instrument approach procedure and no instrument designation indicated on an FAA approved airport layout plan, a military service's approved military airport layout plan, or by any planning document submitted to the FAA by competent authority. (Ord. 16, 6-12-1978)