For the purpose of this chapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AIRPORT ELEVATION. The highest point of an airport’s useable landing area measured in feet above sea level. The AIRPORT ELEVATION of the airport is 36.1 feet.
AIRPORT HAZARD. Any structure or object, natural or human-made, or use of land which obstructs the airspace required for flight or aircraft in landing or taking off at an airport or is otherwise hazardous as defined in 14 C.F.R. part 77 and 74 Pa.C.S. § 5102.
AIRPORT HAZARD AREA. Any area of land or water upon which an airport hazard might be established if not prevented as provided for in this chapter and the Aviation Code, being 74 Pa.C.S. §§ 5101 et seq.
APPROACH SURFACE (ZONE). An imaginary surface longitudinally centered on the extended runway centerline and extending outward and upward from each end of the primary surface. An APPROACH SURFACE is applied to each end of the runway based on the planned approach. The inner edge of the APPROACH SURFACE is the same width as the primary surface and expands uniformly depending on the planned approach. The APPROACH SURFACE ZONE is derived from the approach surface.
CONICAL SURFACE (ZONE). An imaginary surface extending outward and upward from the periphery of the horizontal surface at a slope of 20 feet horizontally to one foot vertically for a horizontal distance of 4,000 feet. The CONICAL SURFACE ZONE is based on the CONICAL SURFACE.
DEPARTMENT. Pennsylvania Department of Transportation.
FAA. Federal Aviation Administration of the United States Department of Transportation.
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 (ZONE). An imaginary plane 150 feet above the established airport elevation that is constructed by swinging arcs of various radii from the center of the end of the primary surface and then connecting the adjacent arc by tangent lines. The radius of each arc is based on the planned approach. The HORIZONTAL SURFACE ZONE is derived from the HORIZONTAL SURFACE.
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.
NONCONFORMING USE. Any pre-existing structure, object of natural growth, or use of land which is inconsistent with the provisions of this chapter or an amendment thereto.
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 planned.
OBSTRUCTION. Any structure, growth or other object, including a mobile object, which exceeds a limiting height set forth by this chapter.
PRECISION INSTRUMENT RUNWAY. A runway having an existing instrument approach procedure utilizing an instrument landing system (ILS) or a precisions 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 document.
PRIMARY SURFACE (ZONE). An imaginary surface longitudinally centered on the runway, extending 200 feet beyond the end of paved runways or ending at each end of turf runways. The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline. The PRIMARY SURFACE ZONE is derived from the PRIMARY SURFACE.
RUNWAY. A defined area of an airport prepared for landing and takeoff of aircraft along its length.
STRUCTURE. An object, including a mobile object, constructed or installed by humans, including but without limitation, buildings, towers, cranes, smokestacks, earth formation and overhead transmission lines.
TRANSITIONAL SURFACE (ZONE). An imaginary surface that extends outward and upward from the edge of the primary surface to the horizontal surface at a slope of seven feet horizontally to one foot vertically (7:1). The TRANSITIONAL SURFACE ZONE is derived from the TRANSITIONAL 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 12,500 pounds maximum gross weight or less.
VISUAL RUNWAY. A runway intended solely for the operation of aircraft using visual approach procedures.
(Ord. 896, passed 12-21-2011)