§ 158.337  SUBAREAS; OVERLAP.
   (A)   To carry out the purpose of this district, the Airport Overlay (AO) District is composed of four overlapping subarea districts that establish different levels of restrictions based on airport boundary areas of influence, safety areas based on hazard zones and structure height regulations, and noise contours as follows. Properties or portions of properties located within multiple subareas shall comply with the standards established for each of those subareas in which the property is located.
   (B)   The areas are:
      (1)   AO-1  Primary Planning Influence Area. The Primary Planning Influence Area designates the subarea that primarily includes standards for avigation easements and lighting as described in §§ 158.350 through 158.353 of this chapter.
      (2)   AO-2  Safety Zones Area. The Safety Zones Area designates the subarea that primarily includes standards for land use, density, and design as designated in §§ 158.365 through 158.367 of this chapter. The boundary of this area is determined by FAA and DoD Imaginary Surfaces definitions for military and civilian airfields (Clear Zone, Runway Protection Zone, Accident Potential Zone 1 and Accident Potential Zone 2) in effect on the effective date of this chapter in conjunction with any other relevant safety area data obtained by the Director.
      (3)   AO-3  Height Restriction Area. The Height Restriction Area designates the subarea that primarily includes standards for controlling height as described in §§ 158.380 through 158.383 of this chapter. The boundary of this area is determined by a combination of measurements including a 1,500-foot buffer around Scott Air Force Base and imaginary surfaces definitions for military and civilian airfields in effect on the effective date of this chapter, in conjunction with any other relevant height restriction data obtained by the Director.
      (4)   AO-4 Noise Zones Area. The Noise Zones Area designates the subarea that primarily includes standards for the attenuation of noise and residential land use controls as specified in §§ 158.395 through 158.398 of this chapter. This boundary is determined by applying the noise contours published by the DoD for Scott Air Force Base in conjunction with any other relevant noise data obtained by the Director.
(Ord. 3718, passed 6-20-2011)