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<br />, <br /> <br />Fli'IUR.l:FLOODS <br /> <br />This section of th~ report discusses the Standard <br /> <br />Project Flood and the Intermediate Regional Flood on Salt Croek in <br />the vicinity of pueble, Colorado. and some ,~f the hazards of cloud- <br />b~r$t type floods over small areas. <br />The standard Project Flood represents the rea~onable <br />upper limits of expected flooding. Floods of Inte~odiate Regional <br />Flood $i~e may be expected to OCCUr more often, but they will not <br />be as savere as the infrequ~nt Standard Project Flood. <br />Large floods have occurred in the past on the Arkansas <br />River and tributaries in the Pueblo area. Cloudbursts similar to <br /> <br />those causing past floods will undoubtedly recUr in the Salt Creek <br />Basinano.these t:orrential rains lMY b" equal to or greater than <br />anything that h~$ occurred in the past. It is dosirable in the <br />determination of futu:<e floods whiCh may occur on a given stream to <br />consid~:< all sto~s and floods that have occurred in the region on <br />watersheds with sirnila:< topography. ground cover and physical charac- <br />teristics. This ~s been done in the Salt Creek Basin where only very <br />lilnit..,J i"(o,,,O<>,tio" is dv"il"il1" on b";:i,, "torm" and flooding. <br />The ma.xirnum known floods that have occurred within the <br /> <br />Pueblo ar~ are listed in Table 2. <br /> <br />rnt..rmediate Regional E'lood <br />The Intermediate Regional I'lood is defined as having an <br />average frequency of CCCUrrence of once in 100 years at a designated <br />to<;ationillthollghitrnaynccurinanyyearandp<lssihlyevenin <br />successive years. The Intermcdi"te Pegional FIQ<>d represents" <br />major flood. althouqh it is less severe than the Standard Proj~ct Flood, <br />The ~~gnitude of this flood on Salt Creek yas determined <br />by""L>giol\alflowfr"'quel\"yanalysisfr01:lwhichpcakfrequcncyc\lrvcs <br /> <br />....,redev<!lloped. <br /> <br />Flood ch"r""toe~l~tics of t.he rntermediat.. Regional Flood <br />fo~ oivcr"qod m""i.rrr= condition" ,..,thin :l>c studv reach arc shown in <br /> <br />T'11J1~ 1. <br /> <br />B <br /> <br />M <br /> <br />I <br />~ <br />" - <br />n <br />~ " <br />" <br />o " <br />o <br />o <br />~ ~ <br />. ! <br />. <br />n <br />s <br />~ ~ <br />q <br />~I <br /> <br />a <br /> <br />~ <br />a <br /> <br />. <br />" <br /> <br />i <br />u <br />~ <br />" <br />o <br />" <br />~ <br />" <br /> <br />" <br />" <br />" <br />. 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