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<br />I <br />, <br />II <br /> <br />1 he s~b-pedk due to urban drai~a'J~ is illustrated in Figure 5. The <br /> <br />effpctcfurbandrainageislf(JstsignificantonMontroseArroyoand <br /> <br />I <br />I <br />I <br /> <br />negliqable on Cedar Creek and Dry Cedar Creek. FQrthisre"sonthehydro- <br />yr,Johs for Cedar and Dry Cedar Creeks renlilinthesameas calculated by <br />Hydro-Triad,Ltd., inPhase!, anda.re included only in the technical <br /> <br />LOcation <br /> <br />f/ontroseArroyo <br /> <br />addend~m. <br /> <br />ujsNiagaraRoad <br />f/.outh <br /> <br />Cedarereek <br /> <br />u/sEast6700 <br />MainStre",t <br />d/s confluence with <br />Montrose Arroyo <br />Mouth <br /> <br />Dry Cedar Creek <br /> <br />E. Otter Road <br />Mauth <br /> <br />Location <br /> <br />MontraseArroyo <br /> <br />South ~th Street <br />Main Street <br /> <br />Cedar Creek <br /> <br />M~in Strpl't. <br /> <br />~ry Cedar Cree~ <br /> <br />-18- <br /> <br />TAIILES <br />SUMMARY OF DISCHARGES (cfs) <br /> <br />Dra.inageArea <br />(SQ. miles) Station <br /> <br />16.5 <br />17.8 <br /> <br />132+00 <br />'"00 <br /> <br />43.6 <br />44.9 <br />65.8 <br />74.1 <br /> <br />432+25 <br />314+00 <br />234+40 <br /> <br />'"00 <br /> <br />21.1 <br />21.9 <br /> <br />115+00 <br />'"00 <br /> <br />Retum <br />5 10 <br /> <br />Frequency in Years <br />50 100 <br /> <br />500 <br /> <br />300 <br />220 300 <br /> <br />790 1,100 1,950 <br />800 1,100 2,000 <br /> <br />490 860 <br />490 860 <br />770 1,550 <br />730 950 1,950 <br /> <br />1,200 <br />1,200 <br />2,000 <br />2,550 <br /> <br />3,100 <br />3,100 <br />4,400 <br />5,150 <br /> <br />370 1,100 1,550 3,000 <br />250 370 1,100 1,550 3,000 <br /> <br />TABLE 6 <br />SUHI1ARY OF URBAN DISCHARGES (cfs) <br /> <br />OrainaQeArea <br />..J.JQ.miles) <br /> <br />1.5 <br />2.3 <br /> <br />(l.~ <br /> <br />ReturnFreQuencyiroYears <br />5 10C <br /> <br />lOa <br />210 <br /> <br />73 <br /> <br />I~o Urban Ora i na ge i mpa c t on Dry Ceda r Cree k <br /> <br />380 <br />550 <br /> <br />19~ <br />