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City of Lino Lakes - Zoning Ordinance <br />Subd. 4. AZO, Airport Zoning Overlay District. <br />A. Airspace Obstruction Zoning. <br />1. Airspace Zones. In order to carry out the purpose of this <br />Ordinance as set forth above, the following airspace zones are hereby <br />established: Primary Zone, Horizontal Zone, Conical Zone, and Approach <br />Zone, and whose locations and dimensions are as follows: <br />a. Primary Zone. All that land which lies directly under <br />an imaginary primary surface longitudinally centered on a runway <br />and extending two hundred (200) feet beyond each end of the <br />runway. The elevation of any point on the primary surface is the <br />same as the elevation of the nearest point on the runway <br />centerline. The width of the primary surface is two hundred fifty <br />(250) feet. <br />b. , Horizontal Zone. All that land which lies directly <br />under an imaginary horizontal surface one hundred fifty (150) feet <br />above the established airport elevation, the perimeter of which is <br />constructed by swinging arcs of specified radii from the center of <br />each end of the primary surface of each runway and connecting the <br />(01 adjacent arcs by lines tangent to those arcs. The radius of each <br />arc is six thousand (6,000) feet. <br />C. Conical Zone. All that land which lies directly under <br />an imaginary conical surface extending upward and outward from <br />the periphery of the horizontal surface at a slope of twenty (2) to <br />one (1) for a horizontal distance of four thousand (4,000) feet, as <br />measured radially outward from the periphery of the horizontal <br />surface. <br />d. Approach Zone. All that land which lies directly <br />under an imaginary approach surface longitudinally centered on the <br />extended centerline at each end of a runway. The inner edge of <br />the approach surface is at the same width and elevation as, and <br />coincides with, the end of the primary surface. The approach <br />surface inclines upward and outward at a slope of twenty (20) to <br />one (1). The approach surface expands uniformly to a width of two <br />thousand five hundred (2,500) feet at a distance of ten thousand <br />(10,000) feet to the periphery of the conical surface. <br />2. Height Restrictions. Except as otherwise provided inth <br />is <br />Ordinance, and except as necessary and incidental to airport operations, <br />no structure or tree shall be constructed, altered, maintained, or allowed <br />9-2 1 <br />