Chapter 27 Flood Plain Management

Home

(c) FLOODPLAIN MANAGEMENT § 27-22 The following uses, not involving fill, shall be evaluated on a case-by-case basis to establish that the use does not cause any increase in base flood elevations: (1) Public and private outdoor nonstructural recreational facilities, lawn, garden, and play areas; (2) Agricultural uses, including farm, grazing, pasture, and outdoor plant nurseries; and (3) Drainage improvements, such as channels and stream crossings. (1993, ord 93-78, sec 3; am 2007, ord 07-169, sec 13.) Section 27-23. Standards for coastal high hazard areas. Coastal high hazard areas are identified as Zone V or Zone VE on the Flood Insurance Rate Maps. Within coastal high hazard areas, the following standards shall apply: (1) All new construction, improvements to repetitive loss structures, and substantial improvements in a coastal high hazard area shall be constructed with materials and utility equipment resistant to flood damage and using methods and practices that minimize flood damage. (2) New construction, improvements to repetitive loss structures, and substantial improvement shall be elevated on adequately anchored pilings or columns and securely anchored to such pilings or columns so that the lowest horizontal portion of the structural members of the lowest floor, excluding the pilings and columns, is elevated to or above the base flood level. The pile or column foundation and structure attached thereto shall be anchored to resist flotation, collapse, and lateral movement due to the effects of wind and water loads acting simultaneously on all building components. The wind and water loading values shall each have a one percent chance of being equaled or exceeded in any given year. (3) New construction, improvements to repetitive loss structures, and other development shall be located on the landward side of the reach of mean high tide. (4) New construction, improvements to repetitive loss structures, and substantial improvement shall have the enclosed space, if any, below the lowest floor free of obstructions and constructed with breakaway walls as defined in section 27-12. Such enclosed space shall not be used for human habitation and will be useable solely for parking of vehicles, building access, or storage. Machinery and equipment which service the building, such as furnaces, air conditioners, heat pumps, hot water heaters, washers, dryers, elevator lift equipment, electrical junction and circuit boxes, and food freezers are not permitted in such enclosed spaces. The enclosed space must only be achieved with breakaway walls, open wood latticework, or insect screening intended to collapse under wind and water loads without causing collapse, displacement, or other structural damage to the elevated portion of the building or supporting foundation system. A breakaway wall shall have a design safe loading resistance of not less than ten and no more than twenty pounds per 27-23 SUPP. 3 (1-2018)