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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />-18- <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> TABLES <br /> SUMMARY OF DISCHARGES (efs) <br /> Drainage Area Return Frequency in Years <br /> Location (sq. miles.L Station 5 10 50 100 500 <br />MontrcseArroyo <br />u/sNiagdra Road 16.5 132+00 300 790 1,100 1,950 <br />Mouth 17.8 "'00 220 300 800 1,100 2,000 <br />Cedar Creek <br />u/s East 6700 43.6 432+25 490 860 1,200 3,100 <br />Main Street 44.9 314+00 490 860 1,200 3,100 <br />d/s confluence with 65.8 234+40 770 1,550 2,000 4,400 <br />HontroseArroyo <br />Mouth 74.1 "'00 730 950 1,950 2,550 5.150 <br />Dry Cedar Creek <br />LOtter Road 21.1 115+00 370 1.100 1,550 3,000 <br />Mouth 21.9 "'00 250 370 1,100 1,550 3,000 <br /> <br />TnI' sub-peak due to urban draina~~ is J11ustrated in Figure 5. The <br />eff~c t of urban dra i nagI' is mos t s i 9" Hi cant on ~:Ontrose Arroyo and <br />negligableon Cedar Creek and QryCedar Creek. For this reason the hydro- <br />graphs for Cedar and Dry Cedar Creeks remain the same as calculated by <br />Hydro-Triaa,Ltcl.. inPhasel,andareincludedonlyintheteehnieal <br />addendum. <br /> <br /> TABLE 6 <br /> SUMMARY OF URBAN DISCHARGES (efs) <br /> Drainage Area Return Frequeneyin Years <br />Location (Sq. miles) 5 100 <br />Montrose Arroyo <br />South 8th Street 1.5 140 380 <br />fldinStreet 2.3 210 550 <br />Cedar Creek <br />Main Street 0,5 7J 195 <br />Dry Cedar Creek No Urban Drainage impact on Dry Cedar Creek <br />