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<br />The area between the floodway and the boundary of <br />the 100-year flood is termed the floodway fringe. <br />The floodway fringe thus encompasses the portion of <br />the flood plain that could be completely obstructed <br />without increasing the water-surface elevation of <br />the 100-year flood more than 1.0 foot at any point. <br />Typical relationships between the floodway and the <br />floodway fringe and their significance to flood plain <br />development are shown in Figure 16. <br /> <br />1 ' <br /> <br />100 YEAR FLOOD PLAIN <br /> <br />'I <br /> <br />FLQODWA Y <br />FRINGE <br /> <br /> <br />FLOODWAY <br /> <br />FLOODWAY <br />FRINGE <br /> <br />STREAM <br />CHANNEL <br /> <br />FLOOD ELEVATION WHEN <br />CONFINED WITHIN FlQOQWAY <br /> <br /> <br />AREA OF FLOOD PLAIN THAT COULD <br />BE USED FOR DEVELOPMENT BY <br />RAISING GROUND <br /> <br /> <br />LINE A B IS THE FLOOD ELEVATION BEFORE ENCROACHMENT <br />LINE C 0 IS THE FLOOD ELEVATION AFTER ENCROACHMENT <br /> <br />.SURCHARGE NOTTO ExceeD 1.0 FOOT lFIA REQUIREMENT) OR LESSEA AMOUNT IF SPECIFIED BY STATE. <br /> <br />Figure 16. <br /> <br />Floodway Schematic <br /> <br />5.0 INSURANCE APPLICATION <br /> <br />In order to establish actuarial insurance rates, the Federal <br />Insurance Administration has developed a process to transform <br />the data from the engineering study into flood insurance <br />criteria. This process includes the determination of reaches, <br />Flood Hazard Factors, and flood insurance zone d~signations <br />for each flooding source studied in detail affecting the <br />unincorporated areas in Las Animas County. <br /> <br />28 <br />