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<br />I" <br /> <br />lOO-YEAR FLOODPLAIN <br /> <br />..\ <br /> <br />... <br /> <br />FLOOOWAl' <br />FRINGE <br /> <br /> <br />.. <br /> <br />FLOODWAY <br /> <br />LOODWA'" <br />FRINGE <br /> <br />STREAM _ <br />CHANNR <br /> <br />FLOOD El.EIIA T'ON WHEN <br />CONFINED WITHIN FLOODWAY <br /> <br /> <br />ENCROACHMENT <br /> <br /> <br />ENCllOACHMENT <br /> <br />..4............. .................. <br />. ............. .................. <br />.....o...U... U................ <br />.................................. <br />.-:".~...":':"..~...~.~..~.~.':":". <br /> <br /> <br />FLOOD ELEVATION BEFORE <br />ENCROACHMENT ON FLOODPLAIN <br /> <br />SURCttA.R.G.E' <br /> <br />AREI'. OF FLOODPLAIN THAT COULD BE USED <br />FOR DEVELOPMENT BY RA'SING GROUND <br /> <br />LINE .0.8;$ THE FLOOD ELEVATION BEFORE ENCROACHMENT. <br />"'NE CD 1$ THE FLOOD ELEVATION AFTER ENCROACHMENT. <br />'SURCHAAGE IS 'lOT TO eXCEED 1,0 FOOT IFIA REQUIREMENT) Oil LESSER AMOUNT IF Sl>ECll'leO BY STATE, <br /> <br />rigure 2. Floodway Schematic <br /> <br />5.0 INSURANCE APPLICATION <br /> <br />I'ot" flood insurance rating purposes, flood insurance zone designations <br />are ass igned to a community based on the resu! t S of the engineerin!l <br />analyses. These zon~s are as follo~s: <br /> <br />Zone A <br /> <br />Zone A is the flood insurancE' rate zone that cot"responds to the <br />lOO-year tloodl'lains determined in the nood Insurance Study by <br />approximate methods. Because detailed hydraulic:: analyses are not <br />performed for such areas, no base flood elevations Or depths are <br />shown within this zone. <br /> <br />Zone AE <br /> <br />Zone AE is the flood insuranc:e rate >:one that corres;>~nJ, to the <br />lC>~-ye<lr f t:>odplains de t e['lI= nee , n the F:oo~ ; ns ,,::" a;::;: e St'~ay ~,y <br />1etai led lIethods. IoIho. le-foot b,ue floco eL e"at lC ns de::" i ..ed frem <br />;:he detailed hydrau.Lic anaiyses <lre shown a~ seiected inter....a15 <br />within ~ni! zone. <br /> <br />22 <br />