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The outer surface, shown on Department of Transport Fort Nelson Airport Zoning Plan B.C. 1421 dated December 31, 1980, is an imaginary surface located at a common plane established at a constant elevation of 45 m above the assigned elevation of the airport reference point, except where that common plane is less than 9 m above the surface of the ground, an imaginary surface is located at 9 m above the surface of the ground.
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