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<br />industrial buildings west of South Windermere Street. <br /> <br />In channel <br /> <br />reaches five and seven, the potential flood damage is primarily due <br /> <br />to bridge backwater conditions and subsequent flooding of homes. <br /> <br />1 . ) PI a!1..JJ2.:..1.:...::..~rat ion an~~_Ma i rl_t_eJ1aJ~<:_C:__~'O.9..l'2J'.en~J'lt:~ <br /> <br />Construction of new structures, enlargement of existing structures, <br /> <br />and selective channel improvements, as propo:;ed in Plan :\0.2, will <br /> <br />greatly reduce potential flood damage and th,c amount of operation and <br /> <br />maintenance r8quired on the channel. <br /> <br />Tbe nature of Big Dry Creek 1S <br /> <br />a fast-flowing stream with moderate overbank flooding. <br /> <br />The Jmprove. <br /> <br />ments proposed in Plan No.2 will reduce the overbank flooding and <br /> <br />resultant debris deposits and thus wi 11 rcqui re 18s5 maintenance expend. <br /> <br />itures for mowing and debris cleanup and rem,)val. <br /> <br />D,) Plan No, 3 - Flood Control Dam and Structure and Channel <br />1m 1)2:0 vc2~~}-,-j:-,,- --{ P 1 ii te No, 8 ,-vorLiiilC2~'TTi' lW]Jlgsr-~--'---" <br /> <br />This plan is based on the constl'uction of a flood control dam <br /> <br />south of the County Lino Road for detontion and gradual reloaso of <br /> <br />SO', of tho upstream runoff from a 10U-ycar frequency storm of six.hour <br /> <br />duration and proposed land use conditions, <br /> <br />(The renlainder of the runofl' <br /> <br />would he allO\ved to flow through wLthout det'cntion). ^ plan for seIee:. <br /> <br />tivc improvement and/or replacement of stlue:tures was also proposed. <br /> <br />^ll of th8 proposed improvcments arc tabnlaL,d in Table 11'.7. <br /> <br />Plan No. 3 - Flood Control Dam and Stru~ture and Channel lmprove- <br /> <br />ments illustrates th8 reduction in the flood pl<l;n frol'l a 100'year <br /> <br />frec,uency storm of six-hour durilLi.on an'; proposed land use conditions <br /> <br />as a result of the improvements proposed in th.is plan. <br /> <br />As in Plan No;;, <br /> <br />1 and 2, the reduction in the 10- and 25")'ear flood plains IV('1'e not <br /> <br />indicated, however, the computed hydraulic results ;lrc availallle in til" <br /> <br />- (i 1. <br />