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<br />, <br /> <br />" <br />-.~<I <br /> <br />per gecond.. I'rom Eaot bt Avenue to the .Denver city limite, pOrtiOlltl of <br /> <br />FLOOD DAMAGES <br /> <br />, <br /> <br />,. <br /> <br />'. <br /> <br />the chsnnelhave been p"rtlally1mproved. rnBomeloclltione, flooding <br />vould begin at diBChargea of 1,450 eubic reet per second (approximately <br /> <br />The st'terml'thQffloodaisdeaolatlon. Thellcenesllhlcn!'ollOll <br /> <br />Ulu8trat.e that the harmless looklng atre8m CliO lIoddoes turn into II <br /> <br />5 year f~quency) while at the other extreme, ~ert81n 10cat100s have <br />channel discharge capacity of 15,800 cubic reet per second (greater <br />probable flood). From the Denver city limite to Cherry Creek De"., the <br />channel capacity ranges from 4,150 to 25,000 cubic feet per second. The <br /> <br />torrent of destruction. There 18 8 tradition that 1n 1858 friendly <br /> <br />Indlao8 had ~8rned the earlier settlers of Denver against camping slong <br /> <br />the banks of harmless looking Cherry Creek. We sre told that th~ firat <br /> <br />settlers vere eonvirlc..d only \then the flood d..bris of a pr..vioua nood, <br /> <br />risk of the lw..r dischsrge occurring ill appI'O>:1mately 1 percent sllIlually, <br /> <br />about 20 f....t up ill the branches of tall cottonvood8, vas pointed out <br /> <br />...heren the upper extrellle of' challllel capacity ia in exee88 of the greater <br /> <br />to them. We kn(N from flood histories thet the earlier varnings vere <br /> <br />probabl.. flood. diacharg... <br />It ehoald be recognized, hovever, that adequate channel capacity at <br /> <br />n..vertheless forgotten or ignored, for on the night of 19 May 100., ev..ry <br /> <br />stI'Uct~e in the bed of Cherry Creek \ta8 ...eshed avay by flood stages <br /> <br />certatn 10c!ltiOIUl does not nece!lssrily inBure agsinst flood rilk, since <br /> <br />twenty feet deep. This flood took twelve lives end cauaed a1molt one <br />million dollars deIIlage. Construction of Cherry Creek Dam and the illlprov..d <br /> <br />flood. stegea may exceed chennel capacity et upstream locationa and flood <br /> <br />Brees adjacent to channellocetiona of adequate cep!lcity. Moreover, <br />obstructions at bridgea or other channel locations may caua.. pondin~ and <br />higher flood steges in areS8 of rel!ltively low risk. For this reason, it <br /> <br />cbenne1tbroughDenverhs8e11.m1natedthe!IWJorfloodhaurds. However, <br /> <br />8S illuatrated On the flood outline maps, some risk remains from the <br /> <br />lOOn! e>:treme floodll origln11ting be10',{ th" d.IIm. <br /> <br />is advissnle to :rely primArily on the flood. outlines illustrated in this <br /> <br />reporltod"tenninaereasof floodhuard. <br /> <br />9 <br /> <br />" <br />