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Cairprehensive Plar Starmwailer Maniazemenit Sub -dement <br />• Sub -basin R-1 (South County) <br />Topogiiaphly <br />Typliaal of the east slope of the A llantic Coastal Sand Ri dga, sub -b asin RI -11 iia ages ftam an ellclvat:ian <br />Of Zero a]an�l the shore of thea IRL to 20 to SIO fMet above sea lelval along the Atlantic Caaslal8and <br />Ridge. <br />S1lruatural Heaatuncls <br />A d j aaear.it Flo the IRL soul h of SHI 60, substarnl i al parr i ons oft sub -basin RI -1 weird filled tca construct <br />res:ideanlial canal subdivisicans. Rleawinitlly, craainiagcl improvemelnts to Old Dlix:iel Ilighlway were <br />aorrpletead, wh:ila draina�lel improvemcants along US 1 in that anea ane curnclrnilly undarway. Other <br />recaent stormwatelr improvemelnts in sub -basin R1-1 inalucel drainage upgradcls in River Shores and <br />Counity Club Plointcl subdivisions, as wclll as the instillalioni of a sllcarma-surge plroteactican systorri in <br />RloaU i dgc I. <br />Hlocad Zonies <br />Withlin sub -bas in Rl-1, f]locad zonie AE extclnds from the wclstarn shorcl of the IRI to approximately <br />-1_`100 Riet inland, whilcl flood 2cana N axtends inland 300 to ]150(1 feet baycand tliall point. The <br />reama:inder caflsub-basin RI -1 is outsida aflthle fiffl year flood hazanc zone. <br />Land Use <br />Land uses in lha R•• 1 sub -b asin inalude mixcld residential users, caommeraial develcapmianats, and opan <br />spaael (e.g. undevalopad flatwoods, asluanine weallands;. <br />Opcarating Br.rtities and llurisdicticanal Rlaspons itility <br />Within sub -bas in 141-1, aulf�lls area mairrtaineld by lhel City) of Mero E eaacbl, the HDIO'fl, and Indian <br />RIvar County, whilcl stormwater manaElelmernil ffaihities scarvin�l the Mista Rloyalla Condominium <br />Dlevclloprn ani ara privately mairnlaainied. <br />Capacity Analysis <br />WI He the stormwater manageamienatt faailities in sub -basin RI-] are capable of aaaommodating al ]east <br />a 1(I yclar/24 hour sal orm avelnt, tha stormwatar faail:il ies associated withl tblca worth extension of Indian <br />River Boulevard ana dasignied to aacommodallel a 11 0(l ycaan/72 bloun storm avarA. <br />Communily Develapnenial Eleprlmier 11 Indian River Counilly 21 <br />