Section 48.20  Definitions

As used in these zoning regulations, unless the context otherwise requires:

            "Airport" – The Greenville Airport located in Section 36 and Section 25, of Township 5 North, Range 3 West of the Third Principal Meridian; and Section 1 of Township 4 North, Range 3 West of the Third Principal Meridian, all in Bond County, Illinois. North, Range 3 East of the Third Principal Meridian, Macon County, Illinois.

            "Airport Elevation" – The established elevation of the highest point on the useable landing area; the established airport elevation shall be 540' above mean sea level (AMSL).

            "Airport Hazard" – Any structure, growth, or use of land which obstructs the airspace required for, or is otherwise hazardous to the flight of aircraft in landing or taking off at the airport.

            "Airport Reference Point" –The point established as the approximate geographic center of the airport landing area and so designated as at Latitude 38° 50' 07" N and Longitude 89° 22' 38" W.

            "Alteration" – Any construction which would result in a change in height of lateral dimensions of an existing structure.

            "Approach, Transitional, Horizontal and Conical Surfacts" – These surfaces are defined in Federal Aviation Regulations, Objects Afecting Navigable Airspace (12 CFR 77).

            "Construction" – The erection or alteration of any structure either of a permanent or temporary character.

            "Department" – The Department of Aeronautics of the State of Illinois.

            "Height" – The overall height of the top of a structure including any appurtenance installed thereon, and for the purpose of determining the height limits in all zones set forth in these regulations and shown on the zoning map, the datum shall be mean sea level elevation unless otherwise specified.

            "Instrument Runway" – A runway equipped or having the potential of being equipped with electronic or visual air navigation aids adequate to permit the landing of aircraft under restricted visibility conditions.

            "Landing Area" – The area of the airport used for the landing, taking off or taxiing of aircraft.

            "Non-Conforming Use" – Any structure, growth, or use of land which is lawfully in existence at the time these zoning regulations or an amendment thereto becomes effective and does not then meet the requirements of said regulations.

            "Non-Instrument Runway" – A runway other than an instrument runway.

            "Permit" – A permit issued by the Department of Transportation, Division of Aeronautics.

            "Person" – An individual, firm, partnership, corporation, company, association, joint stock association, or body politic, and includes a trustee, receiver, assignee, administrator, executor, guardian, or other representative, and including this State and the Division of Aeronautics.

            "Political Subdivision" – Any municipality, city, incorporated town, village, county, township, district, or authority, or any combination of two or more thereof, situated in whole or in part within any of the surfaces established by Section 48.30 and 48.60 hereof.

            "Runway" – The paved surface of an airport landing strip.

            "Slope Ratio" – A numerical expression of a stated relationship of height to horizontal distance, e.g. 1 to 100 means one foot of vertically for each one hundred feet of horizontal distance.

            "State" – The State of Illinois.

            "Structure" – Any form of construction or apparatus of a permanent or temporary character, constructed or installed by man, including any implements or material used in the erection, alteration or repair of such structure, including but without limitation, buildings, towers, smokestacks, and overhead transmission lines.

            "Tree" – Any object of natural growth.

            "Variance" – A grant of relief by the Department from the requirements of these zoning regulations, in accordance with Section 48.100.