Draft EUG Master Plan Update, February 2010

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CHAPTER 6 LANDUSECOMPATIBILITY The FAA is authorized to undertake an aeronautical study to determine whether an object is a hazard to air navigation. However, the FAA is not authorized to regulate tall structures, limit structure heights, or determine which structures should be lighted or marked. As part of aeronautical study determinations, the FAA acknowledges that state or local authorities control the appropriate use of property beneath an airport’s airspace. This reinforces the need for local land use controls to support the findings of the FAA. Exhibits 6-1 6-2 FAR Part 77.25 surfaces are explained below, and shown in and, and the ALP. Horizontal Surface – The horizontal surface is a horizontal plane 150 feet above the established airport elevation. The perimeter is constructed by swinging arcs of specified radii from the center of each end of the primary surface of each runway, and connecting the adjacent arcs by lines tangent to those arcs. The radius of each arc is 5,000 feet for utility or visual runways ends, and 10,000 feet for precision and non- precision runway ends. Conical Surface – The conical surface extends upward and outward from the periphery of the horizontal surface at a slope of 20 to 1 for a horizontal distance of 4,000 feet. Primary Surface – The primary surface is longitudinally centered on a runway. The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline. The width of the primary surface is dependent on the most precise approach procedure existing or planned for either runway end. Approach Surface – The approach surface is longitudinally centered on the extended runway centerline and extends outward and upward from each end of the primary surface. The surface length, outer width, and slope are dependent on the most precise approach procedure existing or planned for the runway end. Transitional Surface – The transitional surfaces begin at the edges of the primary and approach surfaces, extend outward and upward at right angles to the runway centerline at 7 to 1 slope, and extend to the horizontal surface. For precision approach surfaces extending beyond the conical surface, the transitional surface extends 5,000 feet horizontally from the edge of the approach surface. 6-3 Eugene Airport Master Plan Update (February 2010)