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<br />TABLE 12 : FLOW COMPARISON OF SPAR GULCH AT ORIGINAL STREET <br />(DRAINAGE BASINS 14, 22, 23, AND 24) <br /> <br /> PEAK FLOW <br /> SNOWMELT ONLY <br /> NATURAL NATURAL AND <br />RETURN RAIN ONLY SNOW ONLY MANMADE SNOW RAIN ON SNOW <br />FREQUENCY (cfs) (ets) (cfs) (ets) <br />AVERAGE ANNUAL - 10 10 - <br />2-YEAR 70 15 15 226 <br />5-YEAR 100 16 16 299 <br />10-YEAR 155 17 17 387 <br />, 50-YEAR 345 17 17 637 <br />100- YEAR 474 18 18 794 <br /> <br />NOTES: <br /> <br />Rain on snow event assumes 2-hour rain event on the average annual snowmelt event. <br /> <br />The flows shown in this table are estimated using the HEC-1 Computer Program. These flows may vary <br />from the flows at the same location generated using CUHP/SWMM. <br /> <br />FlowComp.xls <br />SparGulch-Table12 <br /> <br />WRC Engineering <br />PN 1963 <br /> <br />9/22/98 <br />7:55 AM <br />