As used in this chapter, unless the context otherwise requires:
1. “Airport” means the Pella Municipal Airport.
2. “Airport elevation” means the highest point of an airport’s usable landing area measured in feet above mean sea level, which elevation is established to be 880 feet.
3. “Airport surface” means 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 this chapter. In plan the perimeter of the approach surface coincides with the perimeter of the approach zone height limitation slope set forth in this chapter.
4. “Approach, transitional, horizontal and conical zones” are the zones set forth in this chapter.
5. “Board of Adjustment” means the board consisting of two (2) members from the City of Pella, appointed by the City Council, and two (2) members from Marion County, appointed by the Marion County Board of Supervisors, and one selected by a majority vote of the four (4) appointed members as provided in this chapter.
6. “Conical surface” means a surface extending outward and upward from the periphery of the horizontal surface at a slope of thirty-four to one (34:1) for a horizontal distance of 4,000 feet.
7. “Hazard to air navigation height” means an obstruction determined to have a substantial adverse effect on the safe and efficient utilization of the navigable airspace 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.
8. “Horizontal surface” means a horizontal plane 150 feet above the established airport elevation, the perimeter of which in plan coincides with the perimeter of the horizontal zone.
9. “Larger than utility runway” means 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.
10. “Nonconforming use” means any preexisting structure, object of natural growth, or use of land, which is inconsistent with the provisions of this chapter or any amendment thereto.
11. “Non-precision instrument runway” means 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.
12. “Obstruction” means any structure, growth or other object, including a mobile object, which exceeds a limiting height set forth in this chapter.
13. “Person” means an individual, firm, partnership, corporation, company, association, joint stock association, or governmental entity; and includes a trustee, a receiver, an assignee, or a similar representative of any of them.
14. “Precision instrument runway” means 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 document.
15. “Primary surface” means 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; when the runway has no specially prepared hard surface, or planned hard surface, the primary surface ends at each end of that runway. The width of the primary surface is set forth in 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.
16. “Runway” means a defined area on an airport prepared for landing and takeoff of aircraft along its length.
17. “Structure” means 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.
18. “Transitional surface” means those surfaces which extend outward at ninety degree (90°) angles to the runway centerline and the runway centerline extended at a slope of seven feet (7') 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 ninety degree (90°) angles to the extended runway centerline.
19. “Tree” means any object of natural growth.
20. “Utility runway” means a runway that is constructed for and intended to be used by propeller driven aircraft of 12,500 pounds maximum gross weight and less.
21. “Visual runway” means a runway intended solely for the operation of aircraft using visual approach procedures.