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<br />designed to automatically equalize hydrostatic flood forces on exterior walls <br />by allowing for the entry and exit of floodwaters. <br /> <br />(a) Designs for complying with this requirement must <br />either be certified by a professional engineer or architect or <br />meet the following criteria: <br /> <br />(i) Provide a minimum of two openings having a <br />total net area of not less than one square inch for <br />every square foot of enclosed area subject to flooding; <br /> <br />(ii) The bottom of all openings shall be no higher <br />than one foot above grade; and <br /> <br />(iii) Openings may be equipped with screens, <br />louvers, valves or other coverings or devices provided <br />they permit the automatic flow of floodwaters in both <br />directions. <br /> <br />(b) Access to the enclosed area shall be the minimum <br />necessary to allow for parking of vehicles (garage door), <br />limited storage of maintenance equipment used in connection <br />with the premises (standard exterior door) or entry to the <br />living area (stairway or elevator). <br /> <br />(c) The interior portion of such enclosed area shall not be <br />partitioned or finished into separate rooms. <br /> <br />(4) Standards for Manufactured Homes and Recreational Vehicles. <br /> <br />(a) All manufactured homes placed, or substantially <br />improved, on individual lots or parcels, in expansions to <br />existing manufactured home parks or subdivisions, or in new <br />or substantially improved manufactured home parks or <br />subdivisions, must have the lowest floor including basement, <br />elevated no lower than ten (10) feet above the base flood <br />elevation. <br /> <br />(b) All manufactured homes placed or substantially <br />improved in an existing manufactured home park or <br />subdivision must be elevated to that: <br /> <br />(i) The lowest floor of the manufactured home is <br />elevated no lower than ten (10) feet above the level of <br />the base flood elevation, or <br /> <br />Flood Damage Prevention <br /> <br />-15- <br />