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<br />Table 3.3. <br /> <br />3.8 <br /> <br />Peak Discharges for 24-Rour Storm. . <br />(From unpublished Hydrology Report <br />for the Floodplain Information study) <br /> <br />Return Period <br />(years) <br /> <br />Peak Discharge (cfs) <br />Cascade Creek Portland Creek <br /> <br />10 <br /> <br />590 <br /> <br />50 <br /> <br />100 <br /> <br />270 <br /> <br />480 <br /> <br />1,050 <br /> <br />606 <br /> <br />1,325 <br />