17.06.025 Airport Overlay Zone Related Definitions

17.06.025 Airport Overlay Zone Related Definitions.

For the purpose of the airport Overlay Zone (Chapter 17.52 MMC), the following definitions shall apply.

Airport – McMinnville Municipal airport.

1. Runway 22: A surface longitudinally centered on the extended runway centerline, extending horizontally and vertically from the end of the primary surface at a 40:1 slope for a horizontal distance of 10,000 feet along the extended runway centerline. The beginning width of the approach surface coincides with the 1,000 foot width of the primary surface and expands to a width of 4,000 feet at a distance of 10,000 feet.

2. Runway 4: A surface longitudinally centered on the extended runway centerline, extending horizontally and vertically from the end of the primary surface at a 34:1 slope for a horizontal distance of 10,000 feet along the extended runway centerline. The beginning width of the approach surface coincides with the 1,000 foot width of the primary surface and expands to a width of 3,500 feet at a distance of 10,000 feet.

3. Runway 17/35: A surface longitudinally centered on the extended runway centerline, extending horizontally and vertically from the end of the primary surface at a 20:1 slope for a horizontal distance of 10,000 feet along the extended runway centerline. The beginning width of the approach surface coincides with the 500 foot width of the primary surface and expands to a width of 3,500 feet at a distance of 10,000 feet.

Airport Approach Zone – The area underneath the airport approach surfaces.

Airport Elevation – For the purpose of determining the height limits in all zones set forth in this ordinance, elevations supplied on the Airport Imaginary Surfaces Map (Century West ALP, 2004) shall be used to calculate height limitations.

Airport Conical Surface – Extends horizontally and vertically from the airport horizontal surface and extends outward and upward at a slope of 20:1 for a horizontal distance of 4,000 feet, terminating at an elevation of 508 feet above sea level.

Airport Conical Zone – The area underneath the airport conical surface.

Airport Hazard – Any structure, tree, or use of land which exceeds height limits established by the airport imaginary surfaces or the presence of glare, smoke, fumes, or vapors which impairs visibility in the vicinity of the airport.

Airport Horizontal Surface – A horizontal plane 150 feet above the established airport elevation, the perimeter of which is constructed by swinging arcs of 10,000 feet from the center of each end of the primary surface of each runway and connecting the adjacent arcs by lines tangent to those arcs.

Airport Horizontal Zone – The area underneath the airport horizontal surface, not including the airport approach zones and the airport primary surfaces.

Airport Imaginary Surfaces – Those imaginary areas in space which constitute the Airport Overlay Zone and are defined by the approach surface, the horizontal surface, and the conical surface as identified on the airport Imaginary Surfaces Map (Century West ALP, 2004). Any structure extending above these imaginary surfaces is a hazard.

Airport Overlay Zone – See “Airport Imaginary Surfaces.”

Airport Primary Surface – A surface longitudinally centered on a runway. When the runway has a specially prepared hard surface, the primary surface extends 200 feet beyond each end of that runway. The width of the primary surface is 1,000 feet for runway 4/22 and 500 feet for runway 17/35.

Airport Runway Protection Zone (i.e., Clear Zone) – Extends at the same slope and horizontal angle as the approach zone from the primary surface to a point where the approach surface is 50 feet above the runway and elevation.

Aviation Easement – An easement which provides right of flight at any altitude above the approach surface, and includes the right to cause noise, vibrations, fumes, dust, fuel particles, and all other effects that may be caused by the operation of any aircraft landing at, or taking off from, or operating at or on McMinnville Municipal airport. The aviation easement may also restrict or prohibit the following from interfering with the operation of the airport:

1Radio or electromagnetic interference;

2Construction of certain types of buildings or structures;

3Natural vegetation;

4Lights, lighted signs, or other lighted objects; and/or

5Hazardous or unreasonably objectionable smoke, fumes, or vapors.

Structure. An object, including a mobile object, constructed or installed by persons, including, but not limited to, buildings, towers, cranes, smokestacks, poles, earth formations, and overhead transmission lines.