In order to carry out the purposes of this Chapter, all of the land within the boundaries of the Airport and all of the land which is delimited by the horizontal projections of all the Airport-Referenced Imaginary Surfaces are hereby divided into five (5) Airport-Referenced Imaginary Surfaces established by reference to the Airport, as shown on the Airport Approach and Zoning Plans for the Airport, and consisting of and described as follows:
(A) Datum Plane: The datum plane is a horizontal plane or surface which includes the surface point of the Airport elevation established to be and at seven hundred eighty-five feet (785') above mean sea level.
(B) Approach Surface: The approach surface is an inclined plane located directly above the approach area, said approach area being symmetrically located with respect to the extended runway center line, the dimensions of said approach area measured horizontally as follows: a length of ten thousand feet (10,000') beginning two hundred feet (200') from the end of the runway or one hundred feet (100') from the end of the landing strip, and extending outward, ending at a point ten thousand two hundred feet (10,200') from the end of the runway or ten thousand one hundred feet (10,100') from the end of the landing strip on the extended center line of the runway or landing strip; a total width of two hundred fifty feet (250') at the end nearest to the runway or landing strip and flared uniformly to a total width of two thousand two hundred fifty feet (2,250') at the end of ten thousand feet (10,000') section.
(C) Horizontal Surface: The horizontal surface is a horizontal plane, circular in shape, having a radius of five thousand feet (5,000') from the airport reference point, at its outer limits and which together with the conical surface, hereinafter described, form the upper boundary of the turning space.
(D) Conical Surface: The conical surface extends upward and outward from the outer limits of the horizontal surface.
(E) Transitional Surfaces: The transitional surfaces are inclined planes, symmetrically located about the center line of the runway or landing strip, extending from the edges of all approach surfaces upward and outward to the intersection with the horizontal surface or the conical surface; the transitional surfaces also extend outward and upward from the edge of the landing strip, parallel with the runway or landing strip center line, until they intersect the horizontal surface.
(F) The boundaries and areas of these Airport-Referenced Imaginary Surfaces are hereby established as shown on the Map, entitled the Airport Approach and Zoning Plans for Dixon Airport, Charles R. Walgreen Field. (Ord. 470, 1-26-65 amd. Ord 1973, 1-6-1997)