As used in this Ordinance, unless the context otherwise requires:

1. Airport: The Logan-Cache Airport or any area of land designated and used for the landing and taking off of aircraft.
2. Airport Elevation: The highest point of an airport's usable landing area measured in feet from mean sea level. This elevation is 4,457 feet MSL as of the date of this ordinance.
3. Airport Hazard: Any structure or use of land which actually or potentially obstructs the airspace required for the safe flight of air craft in landing or taking off at an airport.
4. Approach Surface: A surface longitudinally centered on the extended runway centerline, extending outward and upward from the end of the primary surface and at the same slope as the approach zone height limitation slope set forth in Section 12C-1209 of this Ordinance. In plan the perimeter of the approach surface coincides with the perimeter of the approach zone.
5. Approach, Transitional, Horizontal, and Conical Zones: These zones are set forth in 12C-1208 of this Ordinance.
6. Conical Surface: A surface extending outward and upward from the periphery of the horizontal surface at a slope of 20 to 1 for a horizontal distance of 4,000 feet.
7. F.A.R. Part 77: Federal Aviation Administration regulations pertaining to height and obstruction criteria within prescribed distances from an airport as these regulations currently exist and as may be amended from time to time. Part 77 Regulations may also affect lands located outside the boundaries of the defined Airport Influence Area.
8. Hazard to Air Navigation: An obstruction determined to have a substantial adverse effect on the safe and efficient utilization of the navigable airspace.
9. Height: For the purpose of determining the height limits in all zones set forth in Section 12C-1209(D) and shown on the zoning map, the datum shall be the mean sea level (MSL) elevation unless otherwise specified.
10. Heliport Primary Surface: The primary surface coincides in size and shape with the designated takeoff and landing area of a heliport. This surface is a horizontal plane at the elevation of the established heliport elevation.
11. Horizontal Surface: A horizontal plane 150 feet above the established airport elevation, the perimeter of which in plan coincides with the perimeter of the horizontal zone.
12. Larger than Utility Runway: A runway that is constructed for and intended to be used by propeller driven aircraft of greater than 12,500 pounds maximum gross weight and jet powered aircraft.
13. Ldn: Yearly day-night average sound level.
14. MSL: Mean Sea Level.
15. Nonconforming Use: Any pre-existing structure, object of natural growth, or use which is inconsistent with the provisions of this Ordinance or an amendment thereto.
16. Non-precision Instrument Runway: A runway having an existing instrument approach procedure utilizing air navigation facilities with only horizontal guidance, or area type navigation equipment, for which a straight-in non-precision instrument approach procedure has been approved or planned. It also means a runway for which a non-precision approach system is planned and is so indicated on an approved Airport Layout Plan or any other planning document.
17. Obstruction: Any structure, growth, or other object, including a mobile object, which exceeds a limiting height set forth in Section 12C-1209(D) of this Ordinance.
18. Person: An individual, firm, partnership, corporation, company, association, joint stock association, or governmental entity; includes a trustee, a receiver, an assignee, or a similar representative of any of them.
19. Precision Instrument Runway: A runway having an existing instrument approach procedure utilizing an Instrument Landing System (ILS), a Precision Approach Radar (PAR), a Global Positioning System (GPS), a Transponder Landing System (TLS), or other systems providing both horizontal and vertical guidance. It also means a runway for which a precision approach system is planned and is so indicated on an approved Airport Layout Plan or any other planning document.
20. 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; for military runways or when the runway has no specially prepared hard surface, or planned hard surface, the primary surface ends at each end of  that runway. The width of the primary surface is set forth in Section 12C-1208(E) of this Ordinance. The elevation of any point on the primary surface is the same as the elevation of the nearest point on the runway centerline.
21. Runway: A defined area on an airport prepared for landing and takeoff of aircraft along its length.
22. Structure: An object, including a mobile object, constructed or installed by man, including but not limited to, buildings, towers, cranes, smokestacks, earth formation, and overhead transmission lines.
23. Transitional Surfaces: These surfaces extend outward at 90 degree angles to the runway centerline and the runway centerline extended at a slope of seven (7) feet horizontally for each foot vertically from the sides of the primary and approach surfaces to where they intersect the horizontal and conical surfaces. Transitional surfaces for those portions of the precision approach surfaces, which project through and beyond the limits of the conical surface, extend a distance of 5,000 feet measured horizontally from the edge of the approach surface and at 90 degree angles to the extended runway centerline.
24. Tree: Any object of natural growth.
25. Utility Runway: A runway that is constructed for and intended to be used by propeller driven aircraft of 12,500 pounds maximum gross weight and less.
26. Visual Runway: A runway intended solely for the operation of aircraft using visual approach procedures.

faces as they apply to the Logan-Cache Airport. Such zones are shown on the Logan-Cache Airport-Part 77" Airspace Drawing consisting of two sheets, prepared by Armstrong Consultants, and dated March, 1997, which are attached to this Ordinance and made a part hereof. 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:

1. Airport Influence Area (AIA): An area within the incorporated portions of North Logan City proximate to an airport, which is recognized by the North Logan City Council as containing lands which might be affected by noise and/or safety hazards associated with aircraft operations associated with Logan-Cache Airport. The AIA extends from the airport to the outer edge of the conical surface.
2. Traffic Pattern Zone (TPZ): This zone extends from the airport to the outer edge of the horizontal surface.
3. 65Ldn Noise Area (NA): The area within the 65 decibal yearly day-night average sound level.
4. Inner Approach Zone (IAZ): The inner edge of this zone coincides with the width of the primary surface of Runway 17/35 and is 1,000 feet wide. It extends at a uniform width of 1,000 feet to a horizontal distance of 5,000 feet from the primary surface. The centerline of the Inner Approach Zone is a continuation of the centerline of Runway 17/35.
5. Approach Zone (AZ): The area within the FAR Part 77" Approach Surface for each Runway.
   1. Runway Precision Instrument Approach Zone - The inner edge of this approach zone coincides with the width of the primary surface and is 1,000 feet wide. The approach surface expands outward uniformly to a width of 16,000 feet at a horizontal distance of 50,000 feet from the primary surface. The centerline of the approach zone is the continuation of the centerline of the runway. This is the planned condition at the approach end to Runway 17.
   2. Runway Non-precision Instrument Approach Zone (Larger than Utility Aircraft) - The inner edge of this approach zone coincides with the width of the primary surface and is 1,000 feet wide. The approach zone expands outward uniformly to a width of 3,500 feet at a horizontal distance 10,000 feet from the primary surface. Its centerline is the continuation of the centerline of the runway. This is the condition at the approach end to Runway 35.
   3. Visual Runway Approach Zone (Larger than Utility Aircraft) - The inner edge of this approach zone coincides with the width of the primary surface and is 500 feet wide. The approach surface expands uniformly to a width of 1,500 feet at a horizontal distance of 5,000 feet from the primary surface. The centerline of the approach zone is a continuation of the centerline of the runway. This is the condition at the approach end to Runway 10 and 28.
6. Transitional Zones - The transitional zones are the areas beneath the transitional surfaces.
7. 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 17/35 and connecting the adjacent arcs by drawing lines tangent to those arcs. The horizontal zone does not include the approach and transitional zones.
8. Conical Zone - The conical zone is established as the area that commences at the periphery of the horizontal zone and extends outward therefrom a horizontal distance of 4,000 feet.