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<br />I, <br /> <br />l00-YEAFlHOOOP1-A.lN <br /> <br />,woow., -1- <br />","G' I <br /> <br />FlOODWAY <br /> <br />LOOOWAY <br />F'lI"lG. <br /> <br />STREAM <br />C"lANNtL <br /> <br />FLOOD ELEVATION WHEN <br />CONFINED WITHIN FLOODWAV <br /> <br /> <br />AREA OF FLOODPLAIN THAT COULD Be USED FOR <br />DEveLOPMENT BY RAISING GROUND <br /> <br />LINE AS IS THE flOOD ElEVATlQN BEFORE ENCROACHMENT <br />LINE CD IS THE flOOD ElEVATION AFTER ENCROACHMENT <br />'SURCHARGE ISNor TO EXCEEO 1.0 FOOT(FIAREQUIREMENT) OR LESSER AMOUNT -FSPECIFIED BY STATE <br /> <br />Figure 1. <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 the <br />data from the engineering study into flood insurance criteria. This <br />process includes the determination of reaches, Flood Hazard Factors, <br />and flood insurance zone designations for each flooding source <br />studied in detail affecting the Town of Breckenridge. <br /> <br />5.1 Reach Determinations <br /> <br />Reaches are defined as lengths of watercourses having <br />realtively the same flood hazard, based on the average <br />weighted difference in water-surface elevations between the <br />10- and 100-year floods. This difference does not have a <br />variation greater than that indicated in the following table <br />for more than 20 percent of the rach: <br /> <br />Average Difference Between <br />10- and 100-year Floods <br /> <br />Variation <br /> <br />Less than 2 feet <br />2 to 7 feet <br />7.1 to 12 feet <br />More than 12 feet <br /> <br />0.5 foot <br />1. 0 foot <br />2.0 feet <br />3.0 feet <br /> <br />13 <br />