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<br />4.2 Floodways <br /> <br />The floodway is the channel of a stream, plus any adjacent flood <br />plain areas, that must be kept free of encroachment so that the <br />IOO-year flood can be carried without substantial increases in <br />flood heights. Minimum Federal standards limit such increases to <br />1.0 foot, provided that hazardous velocities are not produced. <br /> <br />Floodways are not presented on the South Arkansas River or Poncha, <br />Chalk, and Cottonwood Creeks. Floodway information for these streams <br />is not available. <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 analyses. <br />These zones are as follows: <br /> <br />Zone A <br /> <br />Zone A is the flood insurance rate zone that corresponds to the <br />IOO-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 depths <br />are shown within this zone. <br /> <br />Zone AE <br /> <br />Zone AE is the flood insurance rate zone that corresponds to the <br />lOO-year flood plains that are determined in the Flood Insurance <br />Study by detailed methods. Whole-foot base flood elevations derived <br />from the detailed hydraulic analyses are shown at selected intervals <br />within this zone. <br /> <br />Zone AH <br /> <br />Zone AH is the flood insurance rate zone that corresponds to the <br />areas of IOO-year shallow 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 />Zone X <br /> <br />Zone X is the flood insurance rate zone that corresponds to areas <br />outside the SOO-year flood plain, areas within the SOC-year flood <br />plain, areas of lOO-year flooding where average depths are less <br />than 1 foot, areas of IOO-year flooding where the contributing <br /> <br />10 <br />