(1) Precision Instrument Approach Zone. Includes Runways 3L, 21R, 30. A precision instrument approach zone is established at each end of a precision instrument runway for instrument landings and takeoffs. The precision instrument approach zones shall have a width of 1,000 feet at a distance of 200 feet beyond each end of the runway, coinciding with the primary surface, widening thereafter uniformly to a width of 16,000 feet at a distance of 50,200 feet beyond each end of the runway, its centerline being the continuation of the centerline of the runway.

(2) Nonprecision Instrument Approach Zone. Includes Runway 12. A nonprecision instrument approach zone is established at each end of a nonprecision instrument runway for improved landings and takeoffs. The nonprecision instrument approach zone shall have a width of 500 feet at a distance of 200 feet beyond each end of the runway, thereafter widening uniformly to a width of 3,500 feet at a distance of 10,200 feet beyond each end of the runway, its centerline being the continuation of the centerline of the runway.

(3) Visual Approach Zone. Includes Runways 3R and 21L. A visual approach zone is established at each end of all visual runways for landings and takeoffs. The visual approach zone shall have a width of 500 feet at a distance of 200 feet beyond each end of the runway, widening thereafter uniformly to a width of 1,500 feet at a distance of 5,200 feet beyond each end of the runway, its centerline being the continuation of the centerline of the runway.

(4) Transition Zones. Transition zones are hereby established adjacent to each instrument and noninstrument runway and approach zone as indicated on the Tri-Cities Airport Future Part 77 Zones map. Transition zones symmetrically located on either side of runways have variable widths as shown on the map. Transition zones extend outward from a line 250 feet on either side of the centerline of the noninstrument runway, for the length of such runway plus 200 feet on each end; and 500 feet on either side of the centerline of the instrument runway, for the length of such runway plus 200 feet on each end, beginning at and are parallel and level with such runway centerlines. The transition zones along such runways slope upward and outward one foot vertically for each seven feet horizontally to the point where they intersect the surface of the horizontal zone. Further, transition zones are established adjacent to both instrument and noninstrument approach zones for the entire length of the approach zones. These transition zones have variable widths, as shown on the Tri-Cities Airport Future Part 77 Zones map. Such transition zones flare symmetrically with either side of the runway approach zones from the base of such zones and slope upward and outward at the rate of one foot vertically for each seven feet horizontally to the points where they intersect the horizontal and conical surfaces. Additionally, transition zones are established adjacent to the instrument approach zone where it projects through and beyond the limits of the conical zone, extending a distance of 5,000 feet measured horizontally from the edge of the instrument approach zones at right angles to the continuation of the centerline of the runway.

(5) Horizontal Zone. A horizontal zone is hereby established as the area within a horizontal plane 150 feet above the established airport elevation or at a height of 560 feet above mean sea level, the perimeter of which is constructed by swinging arcs of 10,000 feet radii from the center of each end of the primary surface of each runway of the airport and connecting the adjacent arcs by lines tangent to those arcs. The horizontal zone does not include the instrument and noninstrument approach zones and the transition zones.

(6) Conical Zone. A conical zone is hereby established as the area that commences at the periphery of the horizontal zone and extends outward therefrom a distance of 4,000 feet. The conical zone does not include the instrument approach zones and transition zones. [Ord. 4111 § 2, 2013; Code 1970 § 25.81.060.]