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The airport zoning ordinance will be incorporated into the LDRs as a section of Chapter 911, Zoning. •Section By Section Analysis SECTION 1: Airport Zoning Ordinance Chapter 911 Section A. The Title, and Purpose and Intent sections are introductory in nature, referencing the need and authority to regulate the uses of land near the traffic patterns of publicly licensed airports. The Definitions section refers to Chapter 901, Definitions. Definitions of new words used in the ordinance are proposed in Section 2 of the ordinance and are to be incorporated into Chapter 901, Definitions. B. The Airport Zones of Influence introductory section establishes the three overlay zones (previously described) as regulatory zones on the county's official zoning atlas. The section states that an amendment to the zone boundaries can be accomplished only via a zoning atlas (map) amendment. Each overlay zone has the effect of applying special airport zoning regulations on certain properties in addition to normal zoning district regulations. Thus, a property currently zoned RS -6 which also is within an overlay zone will be regulated by both the RS -6 and the overlay -zone requirements. Also, the section states that overlay zones affect only the portion of a property covered by the zone and that accessory uses such as parking lots, stormwater tracts, and buffer areas are generally allowed within all of the zones. C. The Airport Height Notification Zone and Regulations incorporates into the ordinance existing federal and state requirements and procedures relating to the height of new structures placed in proximity to the three publicly licensed airports. The section establishes "Subzone All and "Subzone B". The boundary of these subzones consists of an imaginary surface that extends outward from the ends of active runways at an elevation above ground level that increases on a slope of 1' vertical to 100' horizontal (see attachment #7). Thus, the elevation of the zone boundary above the ground increases as the distance from the end of a runway increases. This boundary forms the threshold of an existing "notification zone" whereby anyone proposing to build a structure that would project above the zone boundary is required to notify the FAA. The FAA then reviews the proposal to determine if the building of the structure would be allowable (anticipated not to pose a threat to aircraft operations) under either of the following scenarios: Scenario 1. The proposed structure(s) would not exceed federal obstructions standards set -forth in a federal document known as 1114 CFR Part 77". Scenario 2. The proposed structure(s) would exceed the 14 CFR Part 77 obstruction standards but is determined by the FAA not to be a hazard to air navigation. [Note: marking and lighting conditions can be placed on the approval of such structure(s).] Under Scenario 1., no permit for construction could be issued by the county without an FAA determination of approvability and the granting of an "Airport Construction Waiver" by the Planning and Zoning Commission. Under Scenario 2., no permit for construction could be issued by the county without an FAA determination of approvability and the granting of an "Airport Obstruction Variance" by the Board of Adjustment. 5 MAR - 21993 BOOK Ft�GF 195-55-