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Caimpreihonsive Plan SNormwuler Manflaci ienil Slob-Fleimfmit <br />Haod Zones <br />Wiilhin sub -basin B-2, coastal flload zones "VIE" :is located along the acaast of thle Al lantia Oacian east <br />of AIA. Whlillci a substantial parlion of that sub -basin wast aflAIA is located within a 1(I(I yciar <br />floodplain, finish floor cilcvations above tha 100 -yowl flaad plains clevailion (7 to SI f6cit above MSL) <br />and ac ciquate floodplain silcaraglca caarrpensation triti€late the t1uleail of flcaoding. <br />L and Usci <br />The ma(lorit}j of land usci within sub -basin B -a is singly and miult:i-famaily rcasidcanitial. <br />Capacit51 Analysis <br />c imilar to sub -basin 1, caxcaess:ively c rained sails ciast oflA l A absorb and paraolate storrnwatcar runoff <br />from a 25 year)124 hour silarmi civentAhca caxi sling design caapaaiticas of the Caralstona, Saa Oaks, and <br />Island Club dcavclopments acacaommodatca a 25 yeaD124 hour storm evenil. Sir.iae small] individual <br />silcarmvaateni sysilcams exist, no ]ange publlic drainage faailitias arca priescirc <br />Sub -basin 11-3 <br />Serviaca Aj as <br />c situated l catweaeni C R `I10 and thea north cacaunt� :lira, sub -basin B encompasscas thle northlern one- <br />third ofl0rchlid Is]and. <br />Topogriaphly <br />Within sub -basin B-3 , rclicaflrianges filami 1V1' L at the Allantia Oacaan C oastline to an alcavation of120 <br />f6et abovea saa level. <br />Slrucatura] Acaaturies <br />Within the B-3 sub -basin, thea Summcarplacae Sul division containis swalca parco:lat:ion systems. West of <br />Highway A 11 A, c eavalopmerm s drain it a l argca rertention/dcatenil i ora balsinis wil ll caortroll ad wcairi discharglca <br />struicilurcas draainiinag to thea IRL. Scavaiial remaining albanidoncad aitruis grioves drain vmest via avarl and <br />flaw la cu lveri s l canaath Jungle Trail and into thle I IRIJ. <br />Sincca 1998, the Alorida Deparimier� afl Riansporiation (ADCT) has *improved stormwatcar <br />management faci ] iti cis wast of H i ghway A 1 A to provide ratenti on and tiieail m enit of I runoff l <br />C aiminuiniit} Llevelot ment Dep�irilment Indian River Counilly I S <br />