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The approach surfaces, shown on Coppermine Airport Zoning Plan No. E.2924, dated September 3, 1991, are planes abutting each end of the strip associated with runway 121-301 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 121 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 3 000 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 525 m from the projected centre line; said imaginary horizontal line being 75 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 301 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 3 000 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 525 m from the projected centre line; said imaginary horizontal line being 75 m above the elevation at the end of the strip.
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