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<br /> <br />"f <br /> <br /> <br /> <br />ZONE AO <br />{DEPTH 31 <br />(VELOCITY 8 FPS, <br /> <br />~ <br /> <br />18 <br /> <br />ZONE AO <br />(DEPTH 21 <br />(VELOCID' 6FPS) <br /> <br />ZONE B <br /> <br />ZONE AO <br />IDEPTH 1) <br />(VELOCITY 4 FPS) <br /> <br /> <br />19 <br /> <br />Figure 21. <br />Pori/on of. Flood Insurance Rat. Map (RRM) pan91 for unincorporatlHl <br />San Diego County. California show/ng 8rHS sub/tIC' 10 fOO-year nood <br />hazards on the Hand8N1on Canyon alluvia' fan. <br /> <br />; ~ 1~1 <br /> <br />, <br /> <br />:l <br />" <br /> <br />.~ <br /> <br />;'l' <br /> <br />Figure 22. <br />Flooding hit 1M community of 80rrego Springs Mar ths base of Ih. <br />Henderson Canyon alluvial 'an In Mrtheastem San D/ego County when <br />Tropical Slonn Doresn cross6d the a,.a In 1977. This photo faces <br />southward aCTO!U Afonlszumll Road, and shows the larg. amounts of <br />udlmlmt deposittK/ during this "000. The location of this dams9f' is <br />shown /n 1M FIRM, Figure 21. In consJdsratJon of 1h9 frsquency of flood <br />.".nts and the potentia' ford8118/opmBnt in tha'"rglH Borrego Valleyarea, <br />. flood managemtN1t pllAn /5 Nlng flnaliztK/ by5an DI.go County which will <br />",.scrlbe .tnu;tul'l/and non.troctul'Il flood centrol mfNIsur.. fer alluvial <br />fan. In th. ceunty. <br /> <br />13 <br />