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ORDINANCE 93- 7 <br />AIRPORT HEIGHT LIMITATION ZONE - <br />surrounding each Licensed Public Use <br />Subzone B. That area within the unincorporated area of the <br />county not within Airport Height Notification Subzone A. <br />AIRPORT NOISE IMPACT ZONE - An area contiguous to a publicly <br />licensed airport measuring one-half (1/2) the length of the <br />longest active runway on either side of and at the end of each <br />active runway centerline. For land use control purposes, this <br />boundary shall be -considered to be consistent—with—the 65 to <br />70ldn zone determined by an official Part 150 Noise Study. <br />AIRPORT OBSTRUCTION (Hazard) - Any structure or object of <br />natural growth or use of land which would exceed the federal <br />obstruction standards as contained in 14 CFR Parts 71.21, <br />77 23, 77.25, 77.28, and 77.29 and which obstructs the <br />airspace required for flight of aircraft in taking off, <br />maneuvering or landinq at an airport or is otherwise hazardous <br />', maneuvering or langlnd Ul dILGLG161 auu <br />or for which a variance has not been granted. <br />AIRPORT RUNWAY CLEAR ZONE <br />An area at ground level which begins at the end of a primary <br />surface (as defined in 14 CFR Part 77) and extends with the <br />width of each approach surface (as defined in 14 CFR part 77) <br />to -terminate directly belav-each-approach_surface slope at the - <br />point, or points, where the slope reaches a height of 50 feet <br />above the elevation of the runway or 50 feet above the terrain <br />at the outer extremity of the clear zone, whichever distance <br />is shorter. <br />EASEMENT, AVIGATION - A right of use over property whereby an <br />airport proprietor may operate over real property of another. <br />ELEVATION, AIRPORT - The highest point of the airport's usable <br />landing area measured in feet Above Mean Sea Level (AMSL). <br />LANDING AREA - The area of the airport used for the landing, <br />take -off, or taxiing of aircraft. <br />Ldn - a day/night 24-hour average sound level, in decibels, <br />obtained after addition of 10 decibels to sound levels <br />occurring during the night time period from 10 PM to 7 AM. <br />NOISE LEVEL REDUCTION (NLR) - (also known as Sound Level <br />Reduction (SLR)) Reduction in sound level decibels between <br />two designated locations or rooms for a stated frequency or <br />band. <br />ROOMS, OCCUPIED - Rooms within enclosed structures which are <br />or may reasonably be expected to be used for human activities <br />which involve speech communication; sleeping-; eating-; <br />listening to live, recorded or broadcast music or speech; or <br />the regular use of telephones. <br />RUNWAY - A defined area on an airport prepared for landing and <br />takeoff of aircraft along its length. <br />Coding: Words in • • •• type are deletions from existing law. <br />Words underlined are additions. <br />11 <br />SmeadSoft Reprint Date: Monday, January 26, 2015 - 14:00:10 - OfficialDocuments:458, Attachment Id 1, Page 11 <br />