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ORDINANCE NO, 2003- 006 section, a breakaway wall shall have a design safe loading resistance of not less than ten (10) and no more than twenty (20) pounds per square foot. Use of breakaway walls which exceed a design safe loading resistance of twenty (20) pounds per square foot (either by design or when so required by local or state codes) may be permitted only if a registered professional engineer or architect certifies that the designs proposed meet the following conditions: a. Breakaway wall collapse shall result from a water load less than that which would occur during the base flood, and; b. The elevated portion of the building and supporting foundation system shall not be subject to collapse, displacement, or other structural damage due to the effects of wind and water loads acting simultaneously on all building components (structural and nonstructural). Maximum wind and water loading values to be used in this determination shall each have one percent chance of being equalled or exceeded in any given year (one hundred -year mean recurrence interval). Such enclosed space shall be useable solely for parking of vehicles, building access, or storage. The use of fill for structural support of buildings within Zones VI -30, VE, and V on the county's FIRM is prohibited. Beach dune type fill may be placed beneath the structure provided that the fill would not enhance erosion on neighboring property and is designed to be compatible with surrounding topography and does not result in lateral forces for which the foundation has not been designed. Manmade alteration of sand dunes and mangrove stands within Zones V1-30, VE and V on the county's FIRM which would increase potential flood damage is prohibited. (d) An equal volume of storage capacity must be created for any volume of the base flood that would be displaced by fill or structures except for the following instances: Those development projects within the one hundred -year floodplain along the Indian River when granted a waiver from the cut and fill balance requirements by the board of county commissioners. In the one hundred -year floodplain of the Indian River an equal volume of storage capacity must be created for any volume of the base flood that would be displaced by fill or structures below elevation four (4) feet NGVD, or the ten-year flood elevation which has been determined by FEMA, whichever is greater. The board of county commissioners may, in its discretion, grant a waiver from the provisions of this subsection upon the affirmative showing of the applicant, by means of a competent engineering study, that the development project is situated in an estuarine environment and that the development project, as designed,, will meet all other requirements of the stormwater management and flood protection chapter and will not create a material adverse impact on flood protection on other lands in the estuarine environment. Coding: Words in strike through are deletions from existing law. Words underlined are additions. \\Fileserver\Public\Community Development\Users\ROLANDWiscellaneous\LDR\930.07 mech equip freeboard\930.07 LDR amd 011603.DOC