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<br />Floodways <br /> <br />The floodways for the Town of Pagosa Springs have been combined <br />with the floodplain information and shown on the Flood Insurance <br />Rate Map. <br /> <br />The revised floodway presented in this study for McCabe Creek was <br />computed for certain stream segments on the basis of equal <br />conveyance reduction from each side of the floodplain. Floodway <br />widths were computed at cross sections. Between cross sections, <br />the floodway boundaries were interpolated. The results of the <br />floodway computations are tabulated at selected cross sections <br />(Table 3). In cases where the floodway and lOO-year floodplain <br />boundaries are either close together or collinear, only the <br />floodway boundary has been shown. <br /> <br />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 <br />analyses. These zones are as follows: <br /> <br />Zone AE <br /> <br />Zone AE is the flood insurance rate zone that corresponds to the <br />lOO-year floodplains that are determined in the Flood Insurance <br />Study by detailed methods. Whole-foot base flood elevations <br />derived from the detailed hydraulic analyses are shown at selected <br />intervals within this zone. <br /> <br />Zone AO <br /> <br />Zone AO is the flood insurance rate zone that corresponds to the <br />areas of lOO-year shallow flooding (usually sheet flow on sloping <br />terrain) -where average depths are between land 3 feet. Average <br />whole-foot depths derived from the detailed hydraulic analyses are <br />shown within this zone. <br /> <br />Zone X <br /> <br />. <br /> <br />Zone X is the flood insurance rate zone that corresponds to areas <br />outside the 500-year floodplain, areas within the 500-year <br />floodplain, areas of ,lOO-year flooding where average depths are <br />less than 1 foot, areas of lOO-year flooding where the contributing <br />drainage area is less than 1 square mile, and areas protected from <br />. the lOO-year flood by levees. No base flood elevations or depths <br />are shown within this zone. <br /> <br />Other Studies <br /> <br />This restudy does not agree with the effective Flood Insurance Stud~ for <br />Archuleta County along McCabe Creek. The previously effective study for <br />McCabe Creek was accomplished using the SCS WSP2 computer program. The <br />analysis included in this restudy for McCabe Creek and the West Fork <br /> <br />33 <br />