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Is 100-YEAR FLOODPLAIN <br />FLOODWAY •rt FLOODWAY <br />FRINGE <br />CHANNEL <br />FLOOD ELEVATION WHEN <br />CONFINED WITHIN FLOODWAY <br />FRINGE <br />v -• 7T <br />- SfIftCHARGE' ---••••• ••-..... <br />q ~~. ~~ ~~ . .. ..... ~ ... •. wi~ii.:i:.:i:iw~ ::B <br />AREA OF FLOODPLAIN THAT COULD BE USED°'- '°'- FLOOD ELEVATION BEFORE <br />FOR DEVELOPMENT BY RAISING GROWNDr~~: -. ~ ~ .. - ENCROACHMEN7 ON FLOODPLAIN <br />LINE AB IS THE FLOOD ELEVATION BEFORE ENCROACHMENT,, <br />LINE CD IS THE FLOOD ELEVATION AFTER ENCROACHMENT:'~`° <br />'SURCHARGE IS NOT TO EXCEED 1.0 FOOT (FIA REOUIREMENT)'OR LESSER AMOUNT IF SPECIFIED BY STATE. <br />-:,- -,..:i~~c ~..: <br />Figure 5. Floodwag Schematic <br />5.1 Reach Determinations .~ __..~. <br />Reaches are defined .as •:lengths-of. watercourses having relatively <br />the-.same flood hazard,-based-<on-2ha average weighted difference in <br />water-surface elevations :between-•.the 10- and 100-year floods. .This <br />difference does not have a variation greater than that indicated in <br />the following table for more-than.-20 percent of the reach: <br />Average Difference •$gween;>'-: ;,, <br />1D- and 100-Year Floods.~Y_~~,. Variation <br />Less than 2 feet -,~ ._~ 0.5 foot <br />2 to 7 feet 1.0 foot <br />7.1 to 12 feet Z.0 feet <br />More than 12 feet 3.0 feet <br />4, The locations of reaches determined for the flooding sources of the <br />"~ unincorporated areas of Weld.; County are shown on the Flood Profiles <br />and swnmarized_ in Table 3.:;r.:The;.reach of Eaton Draw affecting the <br />Town of Eaton is shown onPrefle;;;34P. <br />_ .. s~.: <br />5.2 Flood Hazard Factors ,... <br />The FHF is the FEMA device, u~ed_to correlate flood information with <br />insurance rate tables. CorFelat-inns between property damage from <br />;l <br />i8 <br />,~. <br />