For the purposes of this chapter, the following airport safety review areas are established:
A. Airport Safety Review Area 1 (AR1): AR1 includes the areas at either end of a runway, outside the airport boundaries, that correspond with the FAA runway protection zone (per FAR part 152) for each runway end. AR1 also includes any area identified by an interim airport land use plan as a crash hazard zone, or as a touchdown pad and peripheral area for a heliport.
B. Airport Safety Review Area 2 (AR2): AR2 includes the areas within the adopted 65 CNEL (community noise equivalency level) or Ldn (day-night average sound level) noise contours.
C. Airport Safety Review Area 3 (AR3): AR3 includes one of the following areas, as applicable:
1. Public Use Airport With Adopted Noise Contours: For a public use airport with adopted noise contours, AR3 includes the area within one mile outside the sixty five (65) Ldn noise contour, encompassing the boundaries prescribed in FAR part 77 that depict imaginary surfaces for "objects affecting navigable airspace", as applicable to the specific FAA approved airport layout and approach plan. The imaginary surfaces are as follows:
a. Approach surface: Extending outward and upward from the end of the primary runway surface along a slope of twenty to one (20:1) and extending for a horizontal distance of five thousand feet (5,000'). (Slope and distances increase depending on precise approach existing or planned for the particular runway.)
b. Horizontal surface: A horizontal plane one hundred fifty feet (150') above the established airport elevation. The perimeter is constructed by swinging arcs of five thousand feet (5,000') (10,000 feet for runways other than utility or visual) radii from the center of each of the primary runway surfaces (i.e., beginning points of safety review area 1) and connecting the adjacent arcs by lines tangent to the arcs.
c. Conical surface: A surface extending outward and upward from the periphery of the horizontal surface at a slope of twenty to one (20:1) for a horizontal distance of four thousand feet (4,000').
2. Public Use Airport Without Adopted Noise Contours: For a public use airport without adopted noise contours (e.g., 65 Ldn), AR3 includes the area within one mile of the outer boundaries of the airport ownership.
3. Heliports: The area outside the 65 Ldn noise contour for a heliport but within one-half (1/2) mile of the line. (Ord. 253, 12-16-2014)