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<br />I- <br /> <br />IOO-YEAR FLOODPLAIN <br /> <br />.1 <br /> <br />.-- ROODWAY ---. l <br />FRINGE <br /> <br />FLOOQWAY <br /> <br />LOOOWAV <br />FRINGE <br /> <br /> <br />STREAM ___ <br />CHANNEL <br /> <br />AREA OF FLOODPLAIN THAT COULD BE USED <br />FDA DEVELOPMENT BY RAISING GROUND <br /> <br />LINE AS IS THE FLOOD ELEVATION BEFORE ENCROACHMENT,' <br />LINE CD IS THE FLOOD ELEVATION AFTER ENCROACHMENT. . <br />'SURCHAAGE IS NOT TO eXCEED 1.0 FOOT (FIA REOUIREMENTl OR LESSER AMOUNT IF SPECIFIED BY STATE. <br /> <br />Figure 2. Floodway Schematic <br /> <br />5.0 INSURANCE APPLICATION <br /> <br />For flood insurance rating purposes, flood insurance zone designations <br />are assigned to a community based on the results of the engineering <br />analyses. These zones are as follows': <br /> <br />Zone A <br /> <br />Zone A is the flood insurance rate zone that corresponds to the <br />100-year flood plains that are determined in the Flood Insurance <br />Study by approximate methods. Because detailed hydraulic analyses <br />are not performed for such areaS, no base flood elevations or <br />depths are shown this zone. - <br /> <br />Zone AE <br /> <br />Zone AE is the flood insurance rate zone that corresponds to the <br />100-year flood plains that are determined in the Flood Insurance <br />Study by detailed methods. Whole-foot base flood elevations <br />derived from the detailed hydraulic analyses are shown at selected <br />intervals within this zone. <br /> <br />Zone AH <br /> <br />Zone AH is the flood insurance rate zone that corresponds to the <br />areas of 100-year flooding (usually areas of ponding) where <br />average depths are between 1 and 3 feet. Whole-foot base flood <br />elevations derived from the detailed hydraulic analyses are shown <br />at selected intervals within this zone. <br /> <br />20 <br />