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<br />The floodways presented in this study were computed for certain <br />stream segments on the basis of equal conveyance reduction from each <br />side of the flood plain. Between cross sections, the floodway <br />boundaries were interpolated. The results of computations are <br />tabulated at selected cross sections (Table 2). In cases where the <br />floodway and lOa-year flood plain boundaries are either close <br />together o.r collinear, only the floodway boundary has been shown. <br />Floodway data were not provided for Dry Creek and its tributaries, or <br />for pine Creek Overflow. <br /> <br />The area between the floodway and lOa-year flood plain boundaries is <br />termed the floodway fringe. The floodway fringe encompasses the <br />portion of the flood plain that could be completely obstructad <br />without increasing the water-surface elevation of the lOa-year flood <br />by more than 1.0 foot at any point; Typical relationships between <br />the floodway and the floodway fringe' and their significance .to flood <br />plain development are shown in Figure: 2. <br /> <br />. <br /> <br />S.O INSURANCE APPLICATION <br /> <br />For flood insurance rating purposes, flood insurance zone designations are <br />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 100- <br />year flood plains that are determ!ned. in the Flood Insurance Study by <br />approximate methods. Because detailed hydraulic analyses are not <br />performed for such areas, no base flood elevations or depths are <br />shown within this zone. <br /> <br />Zone AE <br /> <br />Zone AE is the flood insurance rate zone that corresponds to the 100- <br />year flood plains that are determined I in the Flood Insurance Study by <br />detailed methods. Whole-foot base flood elevations derived from the <br />detailed hydraulic analyses are shoWn at selected intervals within <br />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, ahas within the SOO-year flood <br />plain, areas of lOa-year flooding whe~e average depths are less than <br />1 foot, areas of lOa-year flooding where the contributing drainage <br />area is less than 1 square mile, :and areas protected from the <br />laO-year flood by levees. No base flood elevations Or depths are <br />shown within this zone. <br /> <br />20 <br />