(A) In order to carry out the provisions of this chapter, there are hereby created and established certain zones which include all of the land lying within the approach zones, transitional zones, horizontal zones and conical zones as they apply to the airport.
(B) The zones are shown on the Hermiston Airport Hazard Zoning Map consisting of one sheet, prepared by the Umatilla County Planning Commission and dated September 24, 1975, which is hereby made a part of this chapter. An area located in more than one of the following zones is considered to be only in the zone with the more restrictive height limitation.
(C) Except as otherwise approved in this chapter, no structure or tree shall be erected, altered, allowed to grow or be maintained in any zone created by this chapter to a height in excess of the applicable height limit herein established for the zone.
(Ord. 1411, passed 4-27-82) Penalty, see 151.99
(A) The inner edge of the Approach Zone coincides with the width of the primary surface and is 500 feet wide.
(B) The Approach Zone expands outward uniformly to a width of 3,500 feet at a horizontal distance of 10,000 feet from the primary surface, its centerline being the continuation of the centerline of the runway. The slope of the Approach Zone is 34 feet horizontal for each foot vertical beginning at the end of and at the same elevation as the primary surface and extending to a horizontal distance of 10,000 feet along the extended runway centerline.
(Ord. 1411, passed 4-27-82)
The inner edge of this zone coincides with the width of the primary surface and is 500 feet wide. The Clear Zone expands uniformly to a width of 1,010 feet at a horizontal distance of 1,700 feet from the primary surface, its centerline being the continuation of the centerline of the runway. The slope of the Clear Zone is 34 feet horizontal for each foot vertical beginning at the end of and at the same elevation as the primary surface and extending to a horizontal distance of 1,700 feet along the extended runway centerline.
(Ord. 1411, passed 4-27-82)
(A) These zones are hereby established as the area beneath the transitional surfaces. These surfaces extend outward and upward at 90 degree angles to the runway centerline and the runway centerline extended.
(B) The slope of the Transitional Zones is seven feet horizontally for each foot vertically beginning at the sides of and at the same elevation as the primary surface and the Approach Zones, and extending to a height of 150 feet above the airport elevation, that is to a height of 789 feet above mean sea level.
(Ord. 1411, passed 4-27-82)
The Horizontal Zone is hereby established by swinging arcs of 10,000 feet radii from the center of each end of the primary surface of each runway and connecting the adjacent arcs by drawing lines tangent to those arcs. The Horizontal Zone does not include the Approach and Transitional zones. The height of the Horizontal Zone is 150 feet above the airport elevation, or 789 feet above mean sea level.
(Ord. 1411, passed 4-27-82)
The Conical Zone is hereby established as the area that commences at the periphery of the Horizontal Zone and extends outward there from a horizontal distance of 4,000 feet. The slope of the Conical Zone is 20 feet horizontally for each foot vertically beginning at the periphery of the Horizontal Zone and at 150 feet above the airport elevation and extending to a height of 350 feet above the airport elevation.
(Ord. 1411, passed 4-27-82)
(A) Nothing in this chapter shall be construed as prohibiting the growth, construction or maintenance of any tree or structure to a height up to 35 feet above the surface of the land.
(B) Where an area is covered by more than one height limitation, the more restrictive limitation shall prevail.
(Ord. 1411, passed 4-27-82)