The provisions of Section 62-512 (Dimensions of visual corridors) shall be modified by the provisions of this Section.

The lowest level of a visual corridor shall be determined by establishing a plane connecting the two points along the street lines from which the visual corridor emanates at an elevation five feet above curb level with the two points where the prolonged street lines intersect the shoreline, stabilized natural shore, bulkhead, upland edge of a waterfront yard raised pursuant to the provisions of paragraph (b) of Section 62-332 (Rear yards and waterfront yards), or the base plane of a pier or platform, whichever intersection occurs first. Such plane shall then continue horizontally seaward from the line of intersection. Visual corridors that are not prolongations of mapped streets shall be determined by establishing a plane connecting an elevation five feet above curb level at the two points along the lot line from which the visual corridor emanates with the two points of intersection at the shoreline, stabilized natural shore, bulkhead, upland edge of a waterfront yard raised pursuant to the provisions of paragraph (b) of Section 62-332, or the base plane of a pier or platform, whichever intersection occurs first.