4-1-090 Airport Overlay Zones

In order to carry out the provisions of this Ordinance, there are hereby created and established certain zones which include all of the land lying beneath the Approach Surfaces, Transitional Surfaces, Horizontal Surfaces, and Conical Surfaces as they apply to an airport. An area located in more than one (1) of the following zones is considered to be only in the zone with the more restrictive height limitation. The various zones are hereby established and defined as follows: A. Airport Influence Area (AIA): An area which is recognized by the Box Elder County Commission as containing lands which might be affected by noise and/or safety hazards associated with aircraft operations associated with Brigham City Municipal Airport. The AIA extends from the airport to the outer edge of the conical surface. B. Traffic Pattern Zone (TPZ): This zone extends from the centerline of Runway 34/16 to the outer edge of the horizontal surface. C. 65Ldn Noise Area (NA): The area within the 65 decibel yearly day-night average sound level. D. Inner Approach Zone (IAZ): The area within the FAR “Part 77" Approach Surface for each Runway. 1. Runway 16 Approach Zone. An approach zone is established at the end of Runway 16 for utility landings and take-offs. The approach zone shall have a width of 500 feet at a distance of 200 feet beyond the end of the runway, widening thereafter uniformly to a width of 1,010 feet at a distance of 1,700 feet beyond the end of the runway, its centerline being the continuation of the centerline of the runway. The approach zone shall rise 1 foot in height for each 20 feet in horizontal distance beginning at a point 200 feet from and at the centerline elevation of the runway and extending to a distance of 5,000 feet from the end of the runway. 2. Runway 34 Precision Approach Zone. A precision instrument approach zone is established at the end of runway 34 for precision instrument approach zone shall have a width of 1,000 feet at a distance of 200 feet beyond the end of the runway; widening thereafter uniformly to a width of 1,750 feet at a distance of 2,700 feet beyond the end of the runway. The precision instrument approach zone shall rise 1 foot in height for each 50 feet in horizontal distance beginning at a point 200 feet from and at the centerline elevation of the precision instrument runway and extending to a point 10,200 feet from the end of the runway. E. Outer Approach Zone (AZ): The area within the FAR “Part 77" Outer Approach Surface for Runway 34 is established at 10,200 feet from the end of runway 34 with a width of 2,500 feet widening thereafter uniformly to a width of 16,000 feet at a distance of 50,200 feet beyond the end of the runway. This approach zone will rise 1 foot in height for each 40 feet in horizontal distance beginning at a point 10,200 feet from and at the centerline elevation of the precision instrument runway and extending to a point 50,200 feet from the end of the runway. F. Transitional Zones: The transitional zones are the areas beneath the transitional surfaces. G. Horizontal Zones: The horizontal zone is established by swinging arcs of 10,000 feet radii from the center of each end of the primary surface of Runway 34/16 and connecting the adjacent arcs by drawing lines tangent to those arcs. The horizontal zone does not include the approach and transitional zones. H. Conical Zone: The conical zone is 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.