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<br />The floodways presented in this study were computed on the basis <br />of equal-conveyance reduction from each side of the flood plain. <br />The results of these computations are tabulated at selected cross <br />sections for each stream segment for which a floodway is computed <br />(Table 4). <br /> <br />A floodway was not computed for the main channel of Fountain Creek <br />between the Atchison, Topeka & Santa Fe Railway and 8th Street. <br />For this portion of the main channel, the 100-year flood plain is <br />considered to be the floodway with the exception of nonconveyance <br />(ineffective flow) areas such as the area west of the Denver & Rio <br />Grande Western Railroad. <br /> <br />In cases where the floodway and 100-year flood plain boundaries <br />are either close together or collinear, only the floodway boundary <br />has been shown. <br /> <br />The area between the floodway and 100-year flood plain boundaries <br />is termed the floodway fringe. The floodway fringe encompasses <br />the portion of the flood plain that could be completely obstructed <br />without increasing the water-surface elevation of the 100-year <br />flood by more than 1.0 foot at any point. Typical relationships <br />between the floodway and the floodway fringe and their significance <br />to flood plain development are shown in Figure 8. <br /> <br />I- <br /> <br />1 DO_YEAR FLOOD PLAIN <br /> <br />-, <br /> <br />F LOODWA Y <br />FRINGE <br /> <br /> <br />FLOQDWAY <br /> <br />FLOODWAY <br />FRINGE <br /> <br />STAEAM <br />CHANNEL <br /> <br />FLOOD ELEVATION WHEN <br />CONFINED WITHIN FLOOOWAY <br /> <br /> <br />AREA OF FLOOD PLAIN THAT COULD <br />BE USED FOR DEVELOPMENT BY <br />RAISING GROUND <br /> <br />LINE AS IS THE FLOOD ELEVATION BEFORE ENCROACHMENT. <br />LINE CD IS THE FLOOD ELEVATION AFTER ENCROACHMENT. <br />.SURCHARGE IS NOTTO ExceeD 1.0 FOOT (FEMA REQUIREMENT) OR LESSER AMOUNT IF SPECIFIED BY STATE. <br /> <br />Figure 8. Floodway Schematic <br /> <br />27 <br />