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<br />Zone AH <br /> <br />Zone AH is the flood insurance rate zone that corresponds to the <br />areas of 100-year flooding (usually areas of ponding) where average <br />depths are between 1 and 3 feet. Whole-foot base flood e~evations <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 100-year f~ooding (usually sheetf10w on sloping terrain) <br />where average depths are between 1 and 3 feet. Average who1e~foot <br />depths derived from the detailed hydrau~ic ana~yses are shown 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, areas within the 500-year f~ood <br />plain, areas of 100-year flooding where average depths are less <br />than 1 foot, areas of 100-year flooding where the contributing <br />drainage area is less than 1 square mile, and areas protected from <br />the 100-year flood by levees. No base flood elevations or depths <br />are shown within this zone. <br /> <br />6.0 FLOOD INSURANCE RATE MAP <br /> <br />The Flood Insurance Rate Map (FIRM) is designed for flood insurance and <br />flood plain management applications. <br /> <br />For f~ood insurance applications, the map designates flood insurance <br />rate zones as described in Section 5.0 and, in the 100-year flood plains <br />that were studied by detailed methods, shows se~ected who~e-foot base <br />flood elevations or average depths. Insurance agents use the zones and <br />base flood elevations in conjunction with information on structures and <br />their contents to assign premium rates for flood insurance policies. <br /> <br />For flood p~ain management applications, the map shows by tints, screens, <br />and symbols, the 100- and 500-year flood plains, the f~oodways, and the <br />locations of se~ected cross sections used in the hydraulic ana~yses and <br />f100dway computations. <br /> <br />The current Flood Insurance Rate Map presents flooding information for <br />the entire geographic area of Pitkin County. Previously, separate FHBMs <br />and/or FIRMs were prepared for each identified f~ood-prone incorporated <br />community and the unincorporated areas of the county. Historical data <br />re~ating to the maps prepared for the City of Aspen, the Town of Snow- <br />mass Vi1~age, and the unincorporated areas of Pitkin County are present- <br />ed in Table 4. <br /> <br />45 <br />