Section 48.30  Zones

In order to carry out the provisions of these zoning regulations, there are created and established certain zones which include all of the land lying within the instrument Approach Zones, Non-Instrument Approach Zones, Transition Zones, Horizontal Zone and Conical Zone.  Such areas and zones are shown on the Greenville Airport Zoning Map consisting of one (1) sheet, prepared by Casler and Associates, Consulting Engineers, Jacksonville, Illinois and dated September 17, 1969, and referred to hereinafter as the zoning map (Note:  this zoning map can be viewed at the Department of Transportation, Division of Aeronautics, Capital Airport, Springfield, Illinois, 62706.  For an example of this information see 92 Ill. Adm. Code 18, Exhibits A, B and C.). The various zones are hereby established and defined as follows:

a)         Instrument Approach Zone – an instrument approach zone is hereby established at each end of the instrument runway for instrument landings and take-offs.  The instrument approach zones shall have a width of 1000 feet at a point 200 feet from the end uniformly to a width of 16,000 feet at a distance of 50,000 feet from the end of the runway, its centerline being the continuation of the centerline of the runway.

b)         Non-Instrument Approach Zone – a non-instrument approach zone is hereby established at each end of the non-instrument runway for non-instrument landings and take-offs.  The non-instrument approach zone shall have a width of 500 feet at a point 200 feet from the end of the runway widening thereafter uniformly to a width of 2,500 feet at a distance of 10,200 feet from the end of the runway, its centerline being the continuation of the centerline of the runway.

c)         Transition Zones – transition zones are hereby established adjacent to both the instrument and non-instrument runways and approach zones as indicated on the zoning map.  Transition Zones located normal to and at the elevation of the centerline of the instrument and non-instrument runways, have variable widths as shown on the zoning map.  Transition zones extend outward from a line 250 feet normal to and at the elevation of the centerline of the non-instrument runway, for the length of such runway plus 200 feet on each end; and 500 feet normal to and at the elevation of the centerline of the instrument runway, for the length of such runway plus 200 feet on each end, and are parallel and level with such runway centerlines.  The transition zones along such runways slope upward and outward one (1) foot vertically for each seven (7) feet horizontally to the point where they intersect the surface of the horizontal zone.  Further, transition zones are established adjacent to both the instrument and non-instrument approach zones, having variable widths, as shown on the zoning 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 (1) foot vertically for each seven (7) feet horizontally to the points where they intersect the surfaces of the horizontal and conical zones. Additionally, transition zones are established adjacent to each instrument approach zone where it projects through and beyond the limits of the conical zone, extending a distance of 5000 feet measured horizontally from the edge of the instrument approach zones at right angles to the continuation of the centerline of the runway.

d)         Horizontal Zone – a horizontal zone is hereby established as the area within a circle with its center at the Airport Reference Point and having a radius of 7,000 feet.

e)         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 5000 feet.