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ORDINANCE NO. 94- 25 (a) Zone A requirements. 8. The Community Development and Public Works Departments shall obtain, review, and reasonably utilize any base flood elevation and floodway data available from a Federal, State, or other source, including data developed pursuant to subsection 930.07(2)(a)7. above, as criteria for requiring that new construction, substantial improvements, or other development in A Zones on the County's FIRM meet the standards in subsections (2)(b)2., (2)(b)3.1 (2)(b)5.1 (2)(b)11., (2)(b)13.a, and (2)(b)13.b of this section. However, in no case shall such development within a Flood Hazard Zone be less than eighteen (18) inches above the crown of the road or elevation required by the Indian River County Health Department. If base flood data are not available, or cannot be estimated by the County, then new buildings, together with mechanical and electrical equipment, must be elevated at least 3 feet above highest adjacent natural grade. Be Section 930.07(2)(b) is hereby amended as follows: (b) Zones OR= A99, AE, A, AH, and AO zone requirements. 1. All development within zones designated 1 A99, AE,A, AH, and AO on the County FIRM shall meet all the standards of Zone A requirements set out in 930.07(2)(a)1. through 12. above. 2. All new construction and substantial improvements of residential structures within Zones A99, AE, and AH on the County FIRM shall have the lowest floor (including basement) elevated to one half (0.5) foot or more m above the base flood level. 3. All new construction and substantial improvements of nonresidential structures within Zones A1-30, AE and AH on the County's FIRM shall a. have the lowest floor, including basement, elevated to one half (0.5) foot or more above the base flood level, or; be together with attendant utility and sanitary facilities, be designed so that any area below the base flood level of the structure is watertight with walls substantially impermeable to the passage of water and with structural components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy. c. Flood -proofing measures must be operable without human intervention and without an outside source of electricity. 6. All manufactured homes to be placed or substantially improved within Zones I A99, AH, and AE of the County's FIRM shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is at one half (0.5) foot or more above the base flood elevation; and be Coding: Words in • • -• • type are deletions from existing law. Words underlined are additions. 17