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Caminrehensive Plan Stcirmwater Man agement Sub-Ilement <br />Although portiicros oflRosaland fall under the jurlsdid ion afltlici Citi ofl8abaisllian, as wall as Indian <br />Rivar County, the majority oft tha Alerning Grant area its managad by the FDEA. Tho AUOT, <br />howaver, ma:inllains facililies along Intarstate 9f in the Homing Grant WatarsHed. <br />Water Quality <br />W:ithini the S1. Sabastian Rivor Basin, water quality its compromised by nutr:iarit loading, Haavy mcilal <br />coniaminallion, and High turbid:iq. Generally, contaminarits tinter thci bas:in's waters thilough <br />agricultural and urban runoffl W:illhin tha 811. Sebastian River, water quality fails to mciat Class III <br />standards (fishing and sw:imimiing). <br />Barnieir Island Basins 11S(inies "B") <br />- Sub -t aisin B-1 <br />8 arvi ce Arcia <br />While sub -basin B-1 comprises the soullheirni ona••11.1ird oft Orahid Island, the portion within the <br />unincarporatad aour.ity extands south of Leaward Dane (wast of Highway A] A) and Shorewinds <br />Llaine (jaast aflHighway A 1A) approximateily three mules south to 1ha Indian Rlvar••St. Ilucici County <br />11ir.ia. North ofltHal arcia, sub -basin H-1 is within the aity of Maro Boach. <br />Topography <br />Within sub -basin B -:I, alevations ranga frame rnean sea 11avel (M81-1) alonig the Atlantic Occian to <br />bolwacin 113 and 11 fee11 INGMD along 11.1a pr:imiaryl dune, aplproximate:ly 30(I fecil west of the MSLI. <br />Si1ructural Haatures <br />RIel aining sl armiwal eir ninaff land provi ding perool ati on, grassed :wool epi run parall al to HigHway A 1A. <br />Wrist of Hi &way A IA, mast devel opcic ari haves posill ive drainages systamis which discharge to tho <br />IRLI. Sinca 1998, the Fllorka Department oft Transportallion (ADOT) has improved starmiwateir <br />management facilities weisl oflH:i�Ihway AIA to provide ratenlliori and treatment of runoff b afcirci :i1 <br />cinleni the lagoons. <br />Flaod Zones <br />Hasl of thle primary coastal curia, coastal vcilociq ar "VE" flood aancis arca lacatod alon�I 11ha Atlantic <br />Ocean Com inc. Wast aflthci VIE Zone :i s thle MO Zonie, a narrow artia designateid as ai l (I(I-year fllood <br />C urr iain ity Develo[Iment Tleparil trier ill Indiari River C our 11y I I <br />