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ZZZ15326 Existing Proposed Drainage - Wetland Type II24-hr 10-yrRainfall=4.26" <br />Prepared by Microsoft Printed 6/8/2017 <br />HydroCAD® 10.00-14 s/n 01542 ©2015 HydroCAD Software Solutions LLC Pape 29 <br />Summary for Pond 4P: INFILTRATION BASIN B <br />Inflow Area = 0.737 ac, 19.05% Impervious, Inflow Depth = 1.14" for 10-yr event <br />Inflow = 1.06 cfs @ 12.00 hrs, Volume= 0.070 of <br />Outflow = 0.01 cfs @ 24.09 hrs, Volume= 0.044 af, Atten= 99%, Lag= 725.2 min <br />Discarded = 0.01 cfs @ 24.09 hrs, Volume= 0.044 af <br />Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af <br />Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs <br />Peak Elev= 885.49' @ 24.09 hrs Surf.Area= 3,021 sf Storage= 2,554 cf <br />Plug -Flow detention time= 1,616.0 min calculated for 0.044 af (63% of inflow) <br />Center -of -Mass det. time= 1,481.4 min (2,290.2 - 808.8 ) <br />Volume Invert Avail.Storage Storage Description <br />#1 884.30' 8,301 cf Custom Stage Data (Prismatic) Listed below (Recalc) <br />Elevation Surf.Area Inc.Store Cum.Store <br />(feet) (sq-ft) (cubic -feet) (cubic -feet) <br />884.30 1,375 0 0 <br />885.00 2,250 1,269 1,269 <br />885.50 3,040 1,323 2,591 <br />886.00 3,500 1,635 4,226 <br />887.00 4,650 4,075 8,301 <br />Device Routing Invert Outlet Devices <br />#1 Primary 885.50' Custom Weir/Orifice, Cv= 2.62 (C= 3.28) <br />Head (feet) 0.00 0.50 <br />Width (feet) 3.00 6.00 <br />#2 Discarded 884.30' 0.300 in/hr Exfiltration over Surface area from 884.30' - 885.50' <br />Excluded Surface area = 1,375 sf <br />Discarded OutFlow Max=0.01 cfs @ 24.09 hrs HW=885.49' (Free Discharge) <br />4-2=Exfiltration (Exfiltration Controls 0.01 cfs) <br />Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=884.30' (Free Discharge) <br />4-1=Custom Weir/Orifice ( Controls 0.00 cfs) <br />