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<br />informakion on the operation of Chatfield Dan For that reason, <br />the SO!..lth Platte River does not match the regional date of the <br />USGS . <br /> <br />The flood frequency-discharges used ln the two. independent <br />re-analyses of the South Platte River were taken from the May 1983 <br />hydrologic study developed by Merrick and Company under contract to <br />the U])I?CD (Reference 1). Analyses were carried out to establish <br />the peak elevation-frequency relationships fo r each flood source <br />studied by detailed methods. Peak-discharge area relationships for <br />the streams studied by detailed methods within Littleton except for <br />SJCD 6100 are shown in Table 1. <br /> <br /> Table 1. S UMMA..F( Y .OF DISCHARGES <br /> """I.~"oSl~..;;::... <br /> .'......",.-.......... <br />Flooding Source Drainage Area Peak Discharges (cfs) <br />and Location (SQUBt'8 miles). lO-Year . SO-Year lOO-Year SOO-Year <br />South Platte River <br />Above Big Dry Creek 24.7* . 3,300 6,900 8,900 15,000' <br />Just upstream of <br /> the confluence,of <br /> Dutch Creek, near <br /> Fairway Lane _ _1 1 , 300 . 2,200 2 ,700 4,000 <br />Big Dry Creek <br />At South Platte <br /> River 19.6 3,400 6,800 8,900 16,020 <br /> ~REVISED DATA <br />Slaughterhouse Gulch <br />At South Platte River 2.0 1,400 1,700 2,000 2 , 900 <br />South Tributary to <br />SLa!..lght.:crhouse Gulch <br />At Slaughterhouse Gulch 037 438 520 550 720 . <br />Little's Creek <br />At South Platte River 2.3 1 , 800.. 2,300 2,800 4,200 <br />Lee Gulch <br />At'South PLatte River 2.5 1,900 2,500 2,900 4,500 <br />SJCD 6200 <br />At a point upstream of <br /> Platte Canyon Road __1 ..1 _-1 2,440 _ _1 <br /> <br />IData Not Available . <br />*Drainage Area Reflects Only Contributing Area Below Chatfield <br /> <br /> <br />l"n <br />' . <br />Hi /;) <br />! t::~:t <br /> <br />11 <br /> <br /> <br /> <br />~ <br />h <br />rlliTtr:n JUN , Q ?nOft <br />