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The approach surfaces, shown on Wrigley Airport Zoning Plan No. E.3040, dated December 5, 1994, are planes abutting each end of the strip associated with runway 10-28 and are described as follows:
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(a) an inclined plane abutting the end of the strip associated with the approach to runway 10 having a ratio of 1 m measured vertically to 30 m measured horizontally, rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant 2 500 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 295 m from the projected centre line; said imaginary horizontal line being 83.3 m above the elevation at the end of the strip; and
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(b) an inclined plane abutting the end of the strip associated with the approach to runway 28 having a ratio of 1 m measured vertically to 30 m measured horizontally, rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant 2 500 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 295 m from the projected centre line; said imaginary horizontal line being 83.3 m above the elevation at the end of the strip.
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