(A) Purpose: Airport operation protection zones are established to protect the existing and future instrument approach minimums of the airport and maintain safe operation of the airport for landing, takeoff and maneuvering of aircraft. These zones do so by preventing the creation of hazards and nuisances to air navigation including obstructions and lighting.
(B) Applicability: In order to carry out these purposes, all of the land lying beneath the approach surfaces, transitional surfaces, horizontal surfaces, and conical surfaces as they apply to the McCall Municipal Airport shall be protected. Such zones are designated on "the current approach plan included in the Airport Layout Plan set included in the Airport Master Plan", incorporated herein by reference. An area located in more than one of the zones shall be subject to the more restrictive height limitation.
(C) Establishment of Zones: The various zones are hereby established and defined as follows:
1. Utility Runway Non-Precision Instrument Approach Zone: The inner edge of this approach zone coincides with the width of the primary surface and is five hundred feet (500') wide. The approach zone expands outward uniformly to a width of two thousand feet (2,000') at a horizontal distance of five thousand feet (5,000') from the primary surface. Its centerline is the continuation of the centerline of the runway.
2. Horizontal Zone: The horizontal zone is established by swinging arcs of five thousand feet (5,000') 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.
3. 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 four thousand feet (4,000').
(D) Height Limitations: No structure shall be erected, altered, or maintained, and no tree shall be allowed to grow in any zone created by this section to a height in excess of the applicable height limit herein established for such zone. Such applicable height limitations are hereby established for each of the zones in question as follows:
1. Utility Runway Non-Precision Instrument Approach Zone: Slopes thirty-four feet (34') outward for each foot upward beginning at the end of and at the same elevation as the primary surface and extending to a horizontal distance of five thousand feet (5,000') along the extended runway centerline.
2. Transitional Zones:
a. Slope seven feet (7') outward for each foot upward beginning at the sides of and at the same elevation as the primary surface and the approach surface, and extending to a height of one hundred fifty feet (150') above the airport elevation which is five thousand twenty one feet (5,021') above mean sea level.
b. Height limits sloping seven feet (7') outward for each foot upward beginning at the sides of and at the same elevation as the approach surface and extending to where they intersect the conical surface.
c. Where the precision instrument runway approach zone projects beyond the conical zone, there are established height limits sloping seven feet (7') outward for each foot upward beginning at the sides of and at the same elevation as the approach surface, and extending a horizontal distance of ten thousand feet (10,000') measured at ninety degree (90°) angles to the extended runway centerline.
3. Horizontal Zone: Established at one hundred fifty feet (150') above the airport elevation or at a height of five thousand one hundred seventy-one feet (5,171') above mean sea level.
4. Conical Zone: Slopes twenty feet (20') outward for each foot upward beginning at the periphery of the horizontal zone and at one hundred fifty feet (150') above the airport elevation and extending to a height of three hundred fifty feet (350') above the airport elevation.
(E) Use Restrictions:
1. No use may be made of land or water within any zone established by this section in such a manner as to create electrical interference with navigational signals or radio communication between the airport and aircraft, make it difficult for pilots to distinguish between airport lights and other objects, result in glare in the eyes of pilots using the airport, impair visibility or ability to acquire and maintain visual acquisition of the airfield in the vicinity of the airport, create bird strike hazards, or otherwise in any way endanger or interfere with the landing, takeoff, or maneuvering of aircraft intending to use the airport.
2. The owner of any existing nonconforming structure or tree is required to permit the installation, operation, and maintenance markers and lights deemed necessary by the airport manager to indicate to the operators of aircraft in the vicinity of the airport the presence of such airport obstruction. Markers and lights shall be installed, operated and maintained at the expense of the city.
(F) Permits Required:
1. Future Uses: Except as specifically provided in subsections a, b, and c of this section, no material change shall be made in the use of land, no structure shall be erected or otherwise established, and no tree shall be planted in any operation protection zone unless a permit is applied for and granted by the McCall Municipal Airport Manager. Each application for a permit shall indicate the purpose for which the permit is desired, in sufficient details to determine whether the use, structure, or tree would conform to these regulations. If such determination is in the affirmative, the permit shall be granted.
a. In the area lying within the limits of the horizontal zone and conical zone, no permit shall be required for any tree or structure less than seventy five feet (75') of vertical height above the ground, except when, because of terrain, land contour, or topographic features, such tree or structure would extend above the height limits prescribed for such zones.
b. In areas lying within the limits of the approach zones, but at a horizontal distance of not less than four thousand two hundred feet (4,200') from each end of the runway, no permit shall be required for any tree or structure less than seventy five feet (75') of vertical height above the ground, except when such tree or structure would extend above the height limit prescribed for such approach zones.
c. In the areas lying within the limits of the transition zones beyond the perimeter of the horizontal zone, no permit shall be required for any tree or structure less than seventy five feet (75') of vertical height above the ground, except when such tree or structure, because of terrain, land contour, or topographic features, would extend above the height limit prescribed for such transition zones.
d. Nothing contained in any of the forgoing exceptions shall be construed as permitting or intending to permit any construction, or alteration of any structure, or growth of any tree in excess of any of the height limits established by this section except as set forth in section 3.7.051D of this chapter.
2. Existing Uses: No permit shall be granted that would allow the establishment or creation of an obstruction or permit a nonconforming use, structure, or tree to become a greater hazard to air navigation than it was on the effective date of the applicable regulations or than it is when the application for a permit is made. Except for abandoned or destroyed existing uses, all applications for such a permit shall be granted.
3. Variances: Any person may request a variance from the provisions of this section by applying and following the procedures set forth in Chapter 13 PERMITS AND APPLICATIONS. In considering a variance from the requirement of these provisions, the application shall be sent to the McCall Municipal Airport Manager for a recommendation prior to action by the Planning and Zoning Commission. (Ord. 984, 12-19-2019, eff. 1-1-2020)