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12/9/02 5:3:24 pm Perteet Engineering. Inc page <br />Silver Lakr: Eiementiry <br />Preliminary Drainage Design <br />HYDROCRAPH SUMMARY <br />PEAK <br />TIME <br />VOLUME <br />HYD <br />RUNOFF <br />OF <br />OF <br />Contrib <br />MUM <br />RATE <br />PEAK <br />HYDRO <br />Area <br />cfs <br />min. <br />cf\ACFC <br />Acres <br />= =1 <br />0.037 <br />0 960 =��--1824L <br />Cf _--=•=1.86� <br />2 <br />0.087 <br />540 <br />3894 <br />Ct <br />1.86 <br />3 <br />0.235 <br />490 <br />7778 <br />cf <br />1.86 <br />4 <br />0.567 <br />480 <br />9083 <br />cf <br />1.86 <br />5 <br />0.804 <br />480 <br />12945 <br />Cf <br />1.86 <br />6 <br />1.162 <br />480 <br />18844 <br />Cf <br />1.86 <br />7 <br />0.019 <br />1460 <br />2679 <br />Cf <br />1.86 <br />a <br />0.087 <br />1350 <br />5982 <br />Cf <br />1.86 <br />9 <br />0.235 <br />690 <br />11822 <br />cf <br />1.86 <br />