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T:\0742\1406\June11 CityApp\Surface Water\ <br />ER Landfill 06_2011-dead storage affect Type 1124-hr 25 yr Rainfall=4.70" <br />Prepared by Wenck Associates, Inc. Printed 8/15/2011 <br />HydroCAD® 9.10 sJn 02201 ©2010 HydroCAD Software Solutions LLC Paae 5 <br />Time span=0.00-96.00 hrs, dt=0.02 hrs, 4801 points <br />Runoff by SCS TR-20 method, UH=SCS <br />Reach routing by Stor-Ind method -Pond routing by Stor-Ind method <br />Subcatchment1A:1A RunoffArea=49,776 sf 0.00% Impervious Runoff Depth=2.37" <br />Flow Length=600' Tc=7.0 min CN=77 Runoff=4.66 cfs 0.226 of <br />Subcatchment1B:1B RunoffArea=392,876 sf 0.00% Impervious Runoff Depth=2.37" <br />Flow Length=1,110' Tc=12.5 min CN=77 Runoff=30.18 cfs 1.784 of <br />Subcatchment2: 2 Runoff Area=90,087 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=750' Tc=7.0 min CN=80 Runoff=9.29 cfs 0.454 of <br />Subcatchment3: 3 RunoffArea=117,164 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=750' Tc=7.0 min CN=80 Runoff=12.08 cfs 0.590 of <br />Subcatchment4: 4 Runoff Area=49,610 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=900' Tc=7.0 min CN=80 Runoff=5.11 cfs 0.250 of <br />Subcatchment5: 4 Runoff Area=104,726 sf 0.00% Impervious Runoff Depth=2.63" <br />Tc=7.0 min CN=80 Runoff=10.80 cfs 0.527 of <br />Subcatchment6: 4 Runoff Area=118,421 sf 0.00% Impervious Runoff Depth=2.63" <br />Tc=7.0 min CN=80 Runoff=12.21 cfs 0.596 of <br />Subcatchment7: 7 RunoffArea=382,086 sf 0.00% Impervious Runoff Depth=2.37" <br />Flow Length=1,220' Tc=13.1 min CN=77 Runoff=28.76 cfs 1.735 of <br />Subcatchment8: 8 RunoffArea=95,406 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=900' Tc=7.0 min CN=80 Runoff=9.84 cfs 0.481 of <br />Subcatchment9: $ RunoffArea=47,226 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=950' Tc=7.0 min CN=80 Runoff=4.87 cfs 0.238 of <br />Subcatchment10: 10 RunoffArea=71,666 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=750' Tc=7.0 min CN=80 Runoff=7.39 cfs 0.361 of <br />Subcatchment11: 11 RunoffArea=97,074 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=805' Tc=6.4 min CN=80 Runoff=10.23 cfs 0.489 of <br />Subcatchment12: 12 RunoffArea=16,047 sf 0.00% Impervious Runoff Depth=2.63" <br />Flow Length=805' Tc=6.4 min CN=80 Runoff=1.69 cfs 0.081 of <br />Subcatchment25S: watershed NW of South Runoff Area=5.930 ac 2.02% Impervious Runoff Depth=0.38" <br />Tc=15.0 min CN=46 Runoff=1.17 cfs 0.187 of <br />Subcatchment26S: wetland west of RR trail Runoff Area=9.930 ac 0.00% Impervious Runoff Depth=0.95" <br />Tc=30.0 min CN=57 Runoff=6.51 cfs 0.790 of <br />SubcatchmentEX-25S: Existing watershed Runoff Area=5.930 ac 2.02% Impervious Runoff Depth=0.38" <br />Tc=15.0 min CN=46 Runoff=1.17 cfs 0.187 of <br />