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HomeMy WebLinkAbout1978-25INDIAN RIVER COUNTY bRDINANCE 78-25 AN EMERGENCY ORDINANCE AMENDING ORDINANCE 78-22 IN TOTO APPLYING TO MINIMUM STANDARDS FOR PRO- CEDURES FOR CONSTRUCTION OF NEW RESIDENTIAL AND NONRESIDENTIAL STRUCTURES UNDER THE FEDERAL FLOOD INSURANCE PROGRAM BE IT ORDAINED BY THE BOARD OF COUNTY COMMISSIONERS OF INDIAN RIVER COUNTY, FLORIDA, That Indian River County Ordinance 78-22 is amended in toto as follows: ARTICLE IX - FLOOD PROTECTION Sections 4-li0-120 of the Code of Ordinances Section 1. PURPOSE AND INTENT. The purpose of this Article is to provide for adequate minimum standards and procedures for the construction of new residential and nonresiden- tial structures, including prefabricated and mobile homes, and for such structures that are substantially improved so that such structures can be eligible for insurance under the Federal Flood Insurance Pro- gram and so that the construction of such structures will be in conform- ity with recognized construction techniques designed to offer flood protection. Section 2. DEFINITIONS. For the purpose of this Section, the following definitions shall apply ift the interpretation, enforcement and intent of this Section. When not 'inconsistent with the context, words used in the present tense include the future, words in the plural number include the singular, and words in the singular number include the plural. The word "shall" is always mandatory and not merely directory. BUILDING PERMIT: The permit as required by The Standard Building Code, as adopted in the Indian River County. Code, which shall in addition include a permit for dredging and grading as -provided for herein. COASTAL HIGH HAZARD AREA: The portion of a coastal floodplain having flood hazards that is subject to velocity waters, including hurricane wave wash and tidal waves and which is designated as a "V" zone on the applicable flood maps. FLOOD OR FLOODING: A general and temporary condition of partial or complete inundation of normally dry land areas from (a) the overflow of streams, rivers or other inland waters or (b) abnormally high tidal waves or rising coastal water resulting from severe storms, hur- ricanes or tidal waves. FLOOD MAPS OR FLOOD HAZARD BOUNDARY MAPS: The set of six (6) separate maps of various areas of Indian River County, Florida, which were approved by the Department of Housing and Urban Development. Said set of maps, dated July 3, 1978, consists of the introductory or index map and five (5) individual maps mumbered 120119 0005A through 120119 0025A, which numbers are indexed to the introductory map. FLOODPROOFING: Those adjustments to properties, structures and building contents which are designed or adapted primarily to reduce flood damages to lands, potable water and sanitary facilities and structures. It shall include structural and nonstructural additions, changes and engineering techniques which seal structures and keep them free from encroachment of floodwater below the one -hundred -year flood level. Any person who attemps to use the floodproofing techniques in order to satisfy the requirements of this Article as to STATE OF FLORIDA. INDIAN RIVER COUNTY THIS IS TO CERTIFY THAT THIS 1S A I -RL AP:C CORS,'—CF COPY OF T• ; 6. G:idAL G:J FILE IN THIS OH ICE. FREDA %V ICHT, CLERK nonresidential structures shall provide the Indian River County Building Official with a certification from a professional engineer who is registered in the State of Florida that said structure is floodproofed or has adequate floodproofing provisions designed within said structure. LEVEL OF ONE -HUNDRED -YEAR FLOOD: The highest level of flooding that on the average i.s 1i ely to occur once every one hundred (100) years (or has a one (1) per cent chance of occurring each year). LOWEST FLOOR ELEVATIONS: The elevation of the lowest supporting member of the lowest floor of any building including basements. SUBSTANTIAL IMPROVEMENT: Any repair, reconstruction, or improvement of a structure, the cost of which equals or exceeds fifty (50%) per cent of the actual cash value of the structure either before the improvement is started, or if the structure has been damaged and is being restored, before the damage occurred. Substantial improvement is commenced when the first alteration of any structural part of the building is begun. Section 3. ADOPTION OF FLOOD HAZARD BOUNDARY AND STUDY MAPS. The flood hazard boundary maps, including the zone designations on said maps and all explanatory material noted thereon, and the flood insurance study, dated January 1978, prepared by the U. S. Department of Housing and Urban Development, Federal Insurance Administration, are hereby incorporated into this Article by. reference in their entirety. Said maps and study shall be kept in the custody of that individual delegated the administrative responsibility by the administrative director of Indian River County for the approval and issuance of building permits. Said maps shall be referred to for a determination of the flood -prone and specified hazard areas and the one -hundred -year base flood elevation line for a calculation of the construction requirements for any structure within the unincorporated areas of Indian River County under the provisions of this Article. Section 4. REQUIREMENTS FOR RESIDENTIAL CONSTRUCTION. Within those unincorporated areas of Indian River County designated as flood hazard areas by the flood maps, all new construction of residential structures or substantial improvements of exist.,. -Hg " residential structures including prefabricated and mobile homes shall have the lowest floor of such structure, including basements, elevated to or above the applicable level of the one -hundred -year "flood. Section 5. REQUIREMENTS FOR NONRESIDENTIAL CONSTRUCTION. Within those unincorporated areas of Indian River County designated as flood hazard areas by the flood maps, all new construction of nonresidential structures shall have the lowest floor including basements, elevated to or above the applicable level of the one -hundred -year flood; or, together with attendant utility and sanitary facilities, such nonresidential structures shall be floodproofed up to the applicable level of the one -hundred -year flood. Section 6. COASTAL HIGH HAZARD AREAS; NONCONFORMING USES. Within those areas designated as coastal high hazard areas by the flood maps, all nonconforming uses on land below the one -hundred - year flood level shall not be expanded. Section 7. DEVELOPMENT OF COASTAL HIGH HAZARD AREAS. Within those areas designated as coastal high hazard areas by the -2- flood maps, no land below the level bf the one-hundred-year _-U. shall be developed unless the new construction or substantial improvement shall: (1) Be located landward of the reach of the mean high tide; (2) Be elevated on adequately anchored piles or columns to a lowest floor level at or above the applicable one-hundred- year flood level and securely anchored to such piles or columns; and (3) Have no basement and have the space below the lowest floor free of obstructions so that the inpact of abnormally high tides or wind-driven water is minimized. Section 8. BUILDING PERMIT APPLICATIONS REVIEWED PRIOR TO ISSUANCE. Within those unincorporated areas of Indian River County designated as flood hazard areas by the flood maps, all building permit applications for new construction or substantial inprovements of residential and nonresidential structures including prefabricated and mobile homes shall be reviewed to assure that the proposed construction shall: (1) Be protected against flood damage; (2) Be designed or modified and anchored to prevent flotation, collapse or lateral movement of the structure; (3) Use 'construction materials and utility equipment that are resistant to flood damage; (4) Use construction methods and practices that will minimize flood damage; (5) Determine that all necessary federal and state permits have been previously obtained and copies of all permits required by federal and state agencies shall accompany the ap- plications for building permits; (6) Determine that all space below the lowest supporting member of the lowest floor including basements shall be open so as not to impede the flow of water; (7) Determine that all buildings or structures located in "V" zones shall be securely anchored on pilings or columns which shall be designed and anchored so as to withstand all applied loads of the base flood flow in compliance with this sub- section, and that such anchoring be certified by a registered professional engineer or architect; (8) Use no fill as structural support; (9) Make no alterations of sand dunes or mangrove stands which could increase potential flood damage; and (10) In any case where breakaway walls are planned, they not be part of the structural support of the building. Section 9. SUBDIVISION REQUIREMENTS: (1) All subdivision proposals shall be consistent with the need to minimize flood damage; -3- (2) All subdivision proposals shall have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize flood damage. (3) All subdivision proposals shall have adequate drainage provided to reduce exposure to flood hazards. (4) Base flood elevation data shall be provided for subdivision proposals and other proposed development which is greater than the lesser of fifty lots or five acres. Section 10. PUBLIC FACILITIES REQUIREMENTS. (1) All new and replacement water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system. (2) (a) New and replacement sanitary sewage systems shall be designed to minimize sir eliminate infiltration of flood waters into the systems and discharges from the systems into the flood waters. (b) On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding. Section 11. MOBILE HOME STRUCTURES. (1) (a) No mobile home shall be placed in a floodway or Coastal High.Hazard Area, except in an existing mobile home park or existing mobile home subdivision. (b) All mobile homes in Flood Hazard Areas shall be anchored to resist flotation, collapse, or lateral move- ment by providing over -the -top and frame ties to ground anchors. Specific requirements shall be that: (i) over -the -top ties be provided at each end of the mobile home, with one additional tie per side at an intermediate location on mobile homes of less than fifty feet and one additional tie per side for mobile homes of fifty feet or more; (ii) frame ties be provided at each corner of the home with four additional ties per side at intermediate points for mobile homes less than fifty feet long and one additional tie for mobile homes of fifty feet or longer; (iii) all components of the anchoring system be capable of carrying a force of 4,800 pounds; and, (iv) any additions to the mobile home be similarly anchored. (2) For new mobile home parks and subdivision; for expansions to existing mobile home parks and subdivisions; for existing mobile home parks and subdivisions where the repair, reconstruction or improvement of the streets, utilities, and pads equals or exceeds fifty per cent of value of the streets, utilities and pads before the repair, recon- struction or improvement has commenced; and, for mobile homes not placed in a mobile home park or subdivision require: (a) stands or lots are elevated on compacted fill or on pilings so that the lowest floor of the mobile home will be at or above the base flood level; M,0 I I (b) adequate surface drainage and access for a hauler are pro- vided; and, , (c) in the instance of elevation on pilings: (i) lots are large enough to permit steps; (ii) piling foundations are placed in stable soil no more than ten feet apart; and (iii) reinforcement is provided for pilings more than six feet above ground level. Section 12. OTHER STRUCTURES. (1) In those areas where base flood elevation date has not been provided prior to the issuance of a building permit a review shall be made of all base flood elevation data available from a federal, state or other source, in order to administer criteria for requiring new or substantial improvements of residential structures to be elevated to or above the base flood elevation. A like review shall be made for all new or substantial improvements of nonresidential structures to be elevated or to be floodproofed to or above the base flood level. Said review shall be performed by the Indian River County Planning and Zoning Department upon request of the Indian River County Building Department. (2) In all unincorporated areas of Indian River County East of the Florida East Coast Railway right-of-way no building permit shall be issued for any structure having less that five feet first floor elevation as defined in Sections 4 and 5 of this Ordinance. Section 13. DREDGING AND GRADING. In all Flbod Hazard Zones East of the Florida East Coast Railway in the unincorporated areas of Indian River County no dredging or grading shall be performed without a building permit issued by the Indian River County Building Department. THIS ORDINANCE shall become effective August 23, 1978. THIS ORDINANCE was passed on an emergency basis after the Board determined an emergency existed. The vote on the Ordinance was; Commissioner Deeson Aye Commissioner Schmucker Ave Commissioner Siebert Aye Commissioner Loy Aye Chairman Wodtke Aye