09/09/2025 - Laserfiche WebLink

Home Browse Search

Policy 1.1: The eCounty hereby adopts the following level-of-service standard for all new drainage systems within the unincorporated eCounty: New development requiring major site plan approval or subdivision platting,where impervious area exceeds 5,000 square feet,shall construct a drainage system capable of mitigating the impacts of a 25 year/24 hour design rainfall event using the Natural Resource Conservation Service(MRCS)Type 2 modified rainfall curves(FLMOD). ' : __ _ . . _ . diselarge. In cases where downstream flooding has occurred the 100 year/24 hour design rainfall event shall be considered. Policy 1.2: - • . .. - - . •. . .. • . .. . -: . - . _ . -•. . _ •• . n n • • • n , n .. .. . _I• . . e $1 Ii_it - . • . s - - _ •- a All new buildings shall be above the 100 Year storm event along with any required appropriate freeboard protection. Elevations shall be defined by Flood Insurance Rate Maps, National Flood Insurance Program requirements, engineering studies and as defined in the County Stormwater Management and Flood Protection ordinance and codes. Policy 1.3: The eCounty shall ensure that adequate storm water management facilities are constructed and maintained to prevent major flooding of the road network of Indian River County during storm events. Policy 1.5: • .•. - •- -- *:•• -- - • - . !! _., .. •• _ _ . At a minimum, all bridges either being replaced or requiring structural designs for repairs shall be placed above the 100-year flood elevation / FIRM / FIS elevation when located on an arterial roadway or thoroughfare plan road as defined in LDR 952.08 to allow for safe emergency passing.All other bridges shall be placed above the storm frequency and duration in accordance with FDOT Drainage Manual.All bridges shall be designed for hydraulics, scour, and to be structurally in accordance with FDOT design manuals, index and specifications. [Best engineering practices] Policy 1.7: Within all new subdivisions, wide appropriately sized backlot and front yard drainage easements, as well as side lot swales to provide for localized runoff routing, will be required where centralized retention/detention facilities are not provided. Objective 2: : ! !, . :. . _ .. - •- . :•: • '. . .. • . , . . - •. .. -, _ -- - .. ' - -- •- -- - - . - --; - ' -e- - ! -• - • - - . Stormwater Management Facilities shall meet current or more stringent regulations as may be passed from time to time. C:\Granicus\Legistar5\L5\Temp\9ec5cab0-071 a-4938-8838-22e53bcab073.docx 34 244