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The approach surfaces, shown on Toronto/Buttonville Airport Zoning Plan No. 19-036-84-05, Sheets 2, 5, 6, 8 and 9, dated May 30, 1986, are surfaces abutting each end to the strips associated with runways designated 03-21 and 15-33 and are described as follows:
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(a) a surface abutting the end of the strip associated with runway approach 03 consisting of an inclined plane 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 1 446 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 174.6 m from the projected centre line; the said imaginary horizontal line being 48.2 m measured vertically above the elevation at the end of the strip;
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(b) a surface abutting the end of the strip associated with runway approach 15 consisting of an inclined plane having a ratio of 1 m measured vertically to 40 m measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant 1 724 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 333.6 m from the projected centre line; the said imaginary horizontal line being 43.1 m above the end of the strip;
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(c) a surface abutting the end of the strip associated with runway approach 21 consisting of an inclined plane 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 1 203 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 150.3 m from the projected centre line; the said imaginary horizontal line being 40.1 m measured vertically above the elevation at the end of the strip; and
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(d) a surface abutting the end of the strip associated with runway approach 33 consisting of an inclined plane having a ratio of 1 m measured vertically to 40 m measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant 1 768 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 340.2 m from the projected centre line; the said imaginary horizontal line being 44.2 m measured vertically above the elevation at the end of the strip.
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