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(2). Transition Zones—Transition zones are hereby established beneath the Transitional <br /> Surface adjacent to each Runway and Approach Surface as indicated on the Airport's Height <br /> Hazard Map.Transitional Surfaces,symmetrically located on either side of Runways,have <br /> variable widths as shown in the Airport's Height Hazard Map.Transitional Surfaces extend <br /> outward and upward at right angles to the Runway centerline and the Runway centerline <br /> extended. The slope of the surfaces is seven to one(7:1)from the sides of the Primary Surface <br /> and from the sides of Approach Surfaces. <br /> (3) Horizontal Zone—A Horizontal zone is established as the area beneath a horizontal <br /> surface 150 feet above the established Airport Elevation,the perimeter of which is constructed <br /> by swinging arcs of 10,000 feet radii from the center of each end of the Primary Surface of <br /> Runways 8/26, 13/31,and 17/35 and connecting the adjacent arcs by lines tangent to those arcs. <br /> (4). Conical Zone—A conical zone is established as the area beneath the Conical Surface <br /> extending outward and upward from the periphery of the Horizontal Surface at a slope of twenty <br /> to one(20:1)for a horizontal distance of 4,000 feet. <br /> In addition to the zones defined above,the FAA establishes and updates airport design related zones as <br /> set forth in FAA Advisory Circular 150-5300-13(current edition)entitled Airport Design. These zones will be a <br /> consideration in evaluating the height of an object. <br /> (c) Height Limitations—Except as otherwise provided in this ordinance,no Airport Hazard shall be erected, <br /> altered, maintained,or allowed to grow in any zone created by this ordinance to a height in excess of <br /> the applicable height limit established in this section for such zone.Such applicable height limitations <br /> are hereby established for each of the zones in question.An area located in more than one of the <br /> identified zones is considered to be only in the zone with the more restrictive height limitation. <br /> Nothing contained in these regulations shall be construed as prohibiting the growth,construction,or <br /> maintenance of any structure or tree to a height of up to fifty(50)feet above the surface of the land at <br /> its location. <br /> (d) Marking and Lighting—Notwithstanding the preceding provisions of this section,the owner of any <br /> nonconforming Structure or Tree is hereby required to give permission for the installation,operation, <br /> and maintenance of markers and lights that are deemed necessary by the City of San Marcos to indicate <br /> to the operators of aircraft in the vicinity of the Airport the presence of such Airport Hazards.Such <br /> markers and lights shall be installed,operated,and maintained at the expense of the city. <br /> All procedures for permitting and enforcement of this ordinance shall be in accordance with Chapter 2 of <br /> the San Marcos Development Code. <br /> Page 6 of 9 <br />