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51 Existing <br /> (c) lawns, gardens, play areas and other similar uses; <br /> (d) golf courses, tennis courts, driving ranges, archery ranges, picnic grounds, parks, <br /> hiking or horseback riding trails, open space and other similar private and public <br /> recreational uses. <br /> [AMENDED 4-27-81 TO REMOVE SUB-SECTION 4.2 (e)] <br /> 4.3 CONSTRUCTION WITHIN FLOODWAY AND FLOODWAY FRINGE <br /> RESTRICTED <br /> (AMENDED 4-22-86) <br /> (a) No structure may be constructed and no substantial improvement of an existing <br /> structure may take place within any floodway. <br /> (b) No new residential structure may be constructed and no substantial improvement <br /> of a residential structure may take place within any floodway fringe unless the <br /> lowest floor, including basement, is elevated to or above the base flood elevation. <br /> (c) For all new construction and substantial improvements, fully enclosed areas below <br /> the lowest floor that are subject to flooding shall be designed to automatically <br /> equalize hydrostatic flood forces on exterior walls by allowing for the entry and <br /> exit of floodwaters. Designs for meeting this requirement must either be certified <br /> by a registered professional engineer or architect or must meet or exceed the <br /> following minimum criteria: a minimum of two openings having a total net area <br /> of not less than one square inch for every square foot of enclosed area subject to <br /> flooding shall be provided; the bottom of all openings shall be no higher than one <br /> foot above grade; openings may be equipped with screens, louvers, or other <br /> coverings or devices provided that they permit the automatic entry and exit of <br /> floodwaters. <br /> (d) No new non-residential structure may be constructed and no substantial <br /> improvement of a non-residential structure may take place within any floodway <br /> fringe unless the lowest floor (including basement) of the structure or <br /> improvement is elevated above the base flood elevation or flood-proofed so that <br /> below the base flood level the structure, together with attendant utility and <br /> sanitary facilities, is water tight with walls substantially impermeable to the <br /> passage of water, will prevent water from entering or accumulating during <br /> conditions of flooding, and is capable of resisting hydrostatic of hydrodynamic <br /> loads and effects of buoyancy. A registered professional engineer or architect <br /> shall certify that the standards of this section are satisfied and that flood-proofing <br /> methods used are adequate to withstand flood forces associated with the base <br /> flood. Such certification shall be provided to the Zoning Officer as set forth in <br /> Article 5.3 (g). <br /> (e) Whenever any portion of the floodway or floodway fringe is filled in with dirt, <br /> slopes shall be adequately stabilized to withstand the erosive force of the base <br />