Any building, structure or use within the Floodway and Flood Fringe Districts which existed before the enactment of these provisions, but which is not in conformity with these provisions, may be continued subject to the following conditions:
A. Expansion or enlargement shall not be permitted unless the effect of the proposed expansion or enlargement on flood heights is fully offset by accompanying stream improvements.
B. Modification, alteration, repair, reconstruction or improvement of any kind to a nonconforming structure or use to an extent or amount of less than 50 percent of its market value shall be elevated and/or floodproofed to the greatest extent possible.
C. Modification, alteration, repair, reconstruction or improvement of any kind to a nonconforming structure or use to an extent or amount of more than 50 percent of its market value shall be completely elevated or floodproofed up to a point 1½ feet above the 100-year flood elevation.
(Ord. 77-5, 2/28/1977, §1402)