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<br />500- Year Peak Discharge <br /> <br />Discharges for the 10-, 25-, 50-, and 100-year flood events <br />developed by the Soil Conservation Service for Spring Creek <br />upstream of Rowe Avenue at the U.S. Highway 85 and Union <br />Pacific Railroad bridges with tributary overflow without the <br />project were plotted on log-probility paper. The 500-year <br />peak discharge was obtained by graphically extrapolating <br />these values. <br /> <br />Return <br />Interval, <br />years <br /> <br />Peak <br />Discharge, <br />cfs <br /> <br />10- <br />25- <br />50- <br />100- <br />500- <br /> <br />2078 <br />3348 <br />4448 <br />5637 <br />8600 <br /> <br />FREQUENCY-DISCHARGE CURVE for SPRING CREEK AT PIERCE, CO. <br /> <br />10000 <br /> <br />8000 <br /> <br />~ <br /> <br />- ~~--~u:::t::--~:::.:- <br /> <br />.-:t.. -..- <br /> <br />. - .. :.--.:~~ <br />==t'- r--'. <br />. - .........---- <br />t - _u <br /> <br />=.- <br />-- <br /> <br />~ <br /> <br />6000 <br /> <br />'-'-- <br />. . <br /> <br />. <br />r.. <br />. <br />u <br />:z <br />.... <br /> <br />;...:::-...: _ _ -: ~~;;-~:-:-F:.-' ... :..... __ - <br />~ _ _;:::. _.:-:ffO',?E _.' __ <br />:....,:- 'h' : --t.. .:'-:.c:: <br />-.-. . '. -- '~':::!-.=+ <br /> <br />-1I1':-~'-. .." T <br />-~= . ~ <br />-::- - :.~~~- <br />- - <br />. . <br /> <br />,~- l= <br /> <br />4000 <br /> <br />~ <br /> <br />rz:I <br />Cl <br />~ <br />< <br />== <br />u <br />CIl <br />.... <br />c:l <br /> <br />~ <br /> <br />3000 <br /> .. <br /> ~ <br /> , <br />2000 , , <br /> , <br /> , , <br /> <br />~ <br />rz:I <br />llo <br /> <br />"- <br />~ A~ high~ay ~ railroad bridges <br />~_w1th tr1butary overflow <br />without the project <br />, 'n. ,-,-.-.- - ", ".. ,- <br />i!IIII"'I' '.1' I, ,T' :T, <br />-.-- <br /> <br /> , , , , , <br />, , " i <br /> , . , ; , , I <br /> f " , , i <br /> i , , , <br /> , : , f ~ , f ! , <br /> , ; ; ! i il : I , <br /> ; , Iii I I I I <br /> ; ~ ~ ~ 1 ! ! <br /> <br />1000 <br /> <br />2 <br /> <br />5 <br /> <br />10 <br /> <br />25 50 100 <br /> <br />500 <br /> <br />EXCEEDANCE INTERVAL IN YEARS <br />