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<br />Zone AH <br /> <br />Zone AH is the flood insurance rate zone that corresponds to the <br />areas of lOO-year flooding (usually areas of ponding) where average <br />depths are between 1 foot and 3 feet. Whole-foot BFEs derived from <br />the detailed hydraulic analyses are shown at selected intervals <br />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 flooding (usually sheetflow on sloping terrain) <br />where average depths are between 1 foot and 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 />Zone X is the flood insurance rate zone that corresponds to areas <br />outside the SOa-year floodplain, areas within the SOD-year <br />floodplain, areas of lOO-year flooding where average depths are less <br />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 BFEs or depths are shown within <br />this zone. <br /> <br />6.0 FLOOD INSURANCE RATE MAP <br /> <br />The FIRM is designed for flood insurance and floodplain management <br />applications. <br /> <br />For flood insurance applications, the map designates flood insurance rate <br />zones as described in Section 5.0 and, in the lOO-year floodplains that <br />were studied by detailed methods, shows selected whole-foot BFEs or <br />average depths. Insurance agents use the zones and BFEs in conjunction <br />with information on structures and their contents to assign premium rates <br />for flood insurance policies. <br /> <br />For floodplain management applications, the map shows by tints, screens, <br />and symbols, the 100- and SOD-year floodplains, the floodways, and the <br />locations of selected cross sections used in the hydraulic analyses and <br />floodway computations. <br /> <br />The current FIRM presents flooding information for the entire geographic <br />area of Pitkin County. Previously, separate FHBMs and/or FIRMs were <br />prepared for each identified flood-prone incorporated community and the <br />unincorporated areas of the county. Historical data relating to the maps <br />prepared for the City of Aspen, the Town of Snowmass Village, and the <br />unincorporated areas of Pitkin County are presented in Table 4. <br /> <br />46 <br />