§ 155.02  DEFINITIONS.
   For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
   AIRPORT.   Eaker Field.
   AIRPORT ELEVATION.   The highest point of an airport's usable landing area measured in feet from sea level.  Eaker Field has an elevation of 698 feet above mean sea level (MSL).
   AIRPORT HAZARD.   Any structure or tree or use of land which obstructs the airspace required for
the flight of aircraft in landing or taking off at Eaker Field or is otherwise hazardous to such landing or taking off of aircraft.
   AIRPORT HAZARD AREA.   Any area of land or water upon which an airport hazard might be established if not prevented as provided in this chapter.
   APPROACH SURFACE.   A surface longitudinally centered on the extended runway centerline, extending outward and upward from the end of the primary surface and at the same slope as the approach zone height limitation slope set forth in § 155.04 of this chapter.  In plan, the perimeter of the approach surface coincides with the perimeter of the approach zone.
   APPROACH, TRANSITIONAL, HORIZONTAL AND CONICAL ZONES.   These zones are set forth in § 155.03 of this chapter.
   BOARD OF ADJUSTMENT.   A Board consisting of five members appointed by the City Council as provided by the laws of the state.
   CONICAL SURFACE.   A surface extending outward and upward from the periphery of the horizontal surface at a slope of 20 to one for a horizontal distance of 4,000 feet.
   HAZARD TO AIR NAVIGATION.   An obstruction determined to have a substantial adverse effect on the safe and efficient utilization of the navigable airspace.
   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 150 feet above the established airport elevation, the perimeter of which in plan coincides with the perimeter of the horizontal zone.  The elevation of the horizontal surface at Eaker Field is 848 feet AMSL.
   LARGER THAN UTILITY RUNWAY.   A runway that is constructed for and intended to be used by propeller driven aircraft of greater than 12,500 pounds maximum gross weight and jet powered aircraft (runways 17-35 and 12-30).
   NON-PRECISION INSTRUMENT RUNWAY.   A runway having an existing instrument approach procedure utilizing air navigation facilities with only horizontal guidance, or area type navigation equipment, for which a straight-in non-precision instrument approach procedure has been approved or is planned (runway 17-35).
   NONCONFORMING USE.   Any pre-existing structure, object of natural growth or use of land that is inconsistent with the provisions of this chapter or an amendment thereto.
   OBSTRUCTION.   Any structure, growth or other object, including a mobile object, which exceeds a limiting height set forth in § 155.04 of this chapter.
   PERSON.   An individual, firm, partnership, corporation, company, association, joint stock association or government entity; includes a trustee, a receiver, an assignee, or a similar representative of any of them.
   PRECISION INSTRUMENT RUNWAY.   A runway having an existing instrument approach procedure utilizing an Instrument Landing System (ILS) or a Precision Approach Radar (PAR).  It also means a runway for which a precision approach system is planned and is so indicated on an approved airport layout plan or any other planning documents (runway 35 planned).
   PRIMARY SURFACE.   A surface longitudinally centered on a runway.  When the runway has a specially prepared hard surface, the primary surface extends 200 feet beyond each end of that runway.  The width of the primary surface is set forth in § 155.03 of this chapter.  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 takeoff of aircraft along its length.
   STRUCTURE.   An object, including a mobile object,  constructed or installed by man, including, but without limitation, buildings, towers, cranes, smokestacks, earth formation, and overhead transmission lines.
   TRANSITIONAL SURFACES.   These surfaces extend outward at 90 degree angles to the runway centerline and the runway 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.  TRANSITIONAL SURFACES for those portions of the precision approach surfaces, which project through and beyond the limits of the conical surface, extend a distance of 5,000 feet measured horizontally from the edge of the approach surface and at 90 degree angles to the extended runway centerline.
   TREE.   Any object of natural growth.
   VISUAL RUNWAY.   A runway intended solely for the operation of aircraft using visual approach procedures.
   ZONING ADMINISTRATOR.   Any city employee as may be so designated by the City Council.
(`93 Code, § 12-702)  (Ord. passed 10-21-74; Am. Ord. 1447, passed 11-9-04)