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xi <br /> Recommendations, Considerations on the Proposed Midway Airport Clear Zones <br /> The purpose of this presentation is to raise several points <br /> • <br /> that belieVm the Commissioners should consider in ruling on <br /> the request � for change of the proposed Midway Airport clear <br /> zone from 5000 feet down to 1000 feet. �. <br /> | � <br /> { <br /> The attached diagram illustrates a 20: 1 clear zone slope which <br /> the FAA considers reasonable for safe airport operation per <br /> DOT (FAA) AdVisory Circular 150/5300-4B dated June 24, 1975. • <br /> Based on Ville 20: 1 clear zone slope and the 1000 foot clear <br /> zone requested by the developer, any object, such as a tree at <br /> the end of the runway clear zone must be no higher than 50 <br /> feet, if h is to be maintained. <br /> , a clear �pproac s ma ' <br /> | � <br /> Based on a | review of tree heights for typical trees in the <br /> area, (Ref: Knowing your Trees" published by the American <br /> Forestry AssOciation in 1974) , an attained height of 110 ' is a <br /> | � <br /> reasonable estimate for trees in this area. <br /> • <br /> Tree Heights for commonly found trees in this area: <br /> Loblolly Pine 120' <br /> Pitch Pine 90 - 100' <br /> Long Leaf Pine 100 - 120' <br /> Eastern Red Cedar 120' <br /> � Lombardy Poplar 100' <br /> Hickory 120 - 140' <br /> Beech 120' <br /> Southern Red Oak 100' <br /> White Oak 150' <br />