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T:\0742\1406\June11 CityApp\Surface Water\ <br />ER Landfill 06_2011 Type ll 24-hr 25 yr Rainfall=4.70" <br />Prepared by Wenck Associates, Inc. Printed 8/2/2011 <br />HydroCAD® 9.10 s!n 02201 ©2010 HydroCAD Software Solutions LLC Page 6 <br />Reach DS1-L: DS-1-Lower Avg. Flow Depth=0.52' Max Vet=10.94 fps Inflow=53.97 cfs -3.208 of <br />n=0.035 L=150.0' S=0.2000'/' Capacity=175.15 cfs Outflow=53.96 cfs 3.208 of <br />Reach DS1-U: DS-1-Upper Avg. Flow Depth=0.52' Max Vet=9.17 fps Inflow=45.64 cfs 2.755 of <br />n=0.035 L=215.0' S=0.1395'/' Capacity=146.29 cfs Outflow=45.60 cfs 2.755 of <br />Reach DS2-L: DS-2-Lower Avg. Flow Depth=0.40' Max Vet=11.58 fps Inflow=42.91 cfs 2.577 of <br />n=0.035 L=120.0' S=0.3000 'P Capacity=214.51 cfs Outflow=42.91 cfs 2.577 of <br />Reach DS2-U: DS-2-Upper Avg. Flow Depth=0.36' Max Vet=10.39 fps Inflow=34.37 cfs 2.096 of <br />n=0.035 L=110.0' S=0.2727 '/' Capacity=204.53 cfs Outflow=34.36 cfs 2.096 of <br />Pond 25P: Basin east of RR, NW of S Peak EIev=959.00' Storage=0.142 of Inflow=1.83 cfs 2.298 of <br /> Outflow=1.82 cfs 2.272 of <br />Pond 26P: Wetland west of RR trail, NW of S Peak Elev=955.98' Storage=0.835 of Inflow=6.52 cfs 3.062 of <br />Primary=1.09 cfs 1.528 of Secondary=1.09 cfs 1.528 of Outflow=2.17 cfs 3.055 of <br />Pond EX-25P: Existing Basin east of RR, NW Peak Elev=958.48' Storage=0.053 of .Inflow=1.17 cfs 0.187 of <br />Outflow=0.24 cfs 0.165 of <br />Pond EX-26P: Existing Wetland west of RR Peak EIev=956.00' Storage=0.864 of Inflow=6.52 cfs 0.954 of <br />Primary=1.25 cfs 0.954 of Secondary=0.00 cfs 0.000 of Outflow=1.25 cfs 0.954 of <br />Pond P-1: P-1 Peak Elev=993.63' Storage=147,376 cf Inflow=76.98 cfs 5.015 of <br />18.0" Round Culvert n=0.013 L=1,550.0' S=0.0232 '/' Outflow=1.70 cfs 2.112 of <br />Pond P-2: SE pond Peak EIev=1,021.39' Storage=134,703 cf Inflow=58.31 cfs 3.384 of <br />18.0" Round Culvert n=0.012 L=120.0' S=0.1917'/' .Outflow=0.68 cfs 0.620 of <br />Pond SE-pipe: SE culvert Peak EIev=1,049.86' Inflow=58.31 cfs 3.384 of <br />24.0" Round Culvert n=0.011 L=100.0' S=0.1000'/' Outflow=58.31 cfs 3.384 of <br />Pond SW-pipe: SW culvert Peak Eiev=1,030.27' Inflow=76.98 cfs 4.395 of <br />24.0" Round Culvert n=0.011 L=90.0' S=0.0222 '/' Outflow=76.98 cfs 4.395 of <br />Total Runoff Area = 69.022 ac Runoff Volume = 9.733 of Average Runoff Depth = 1.69" <br />99.65% Pervious = 68.782 ac 0.35% Impervious = 0.240 ac <br />