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C:1Program FilesUiydroCAD�Projects�HydroCAD Projects�08 JOBS\ <br /> 081756 Barry Sewall Proposed Conditions May 13, 2009 ( Type 1124-hr 2 Year Rainfall=2.75" <br /> Prepared by Gronberg &Associates, Inc. Printed 5/20/2009 9:31:36 AM <br /> HydroCAD�9.00 s/n 04529 �2009 HydroCAD Software Solutions LLC Pas�e 9 <br /> Summary for Pond 3P: Pond 3, Area 4 <br /> Inflow Area= 2.726 ac, 11.59% �mpervious, Inflow Depth > 0.11" for 2 Year event <br /> Inflow = 0.45 cfs(d3 12.04 hrs, Volume= 0.026 af <br /> Outflow = 0.21 cfs� 12.17 hrs, Volume= 0.025 af, Atten= 53%, Lag= 7.9 min <br /> Primary = 0.21 cfs @ 12.17 hrs, Volume= 0.025 af <br /> Routing by Stor-Ind method,Time Span= 5.00-20.00 hrs, dt= 0.05 hrs <br /> Peak Elev= 932.42'@ 12.17 hrs Su�f.Area=0.013 ac Storage= 0.005 af <br /> Plug-Flow detention time=24.2 min calculated for 0.025 af(97% of inflow) <br /> Center-of-Mass det. time= 14.2 min (854.3-840.1 ) <br /> Volume Invert Avail.Stora4e Storaqe Description <br /> #1 932.00' 0.066 af Custom Stage Data(Prismatic) Listed below(Recalc) <br /> Elevation Surf.Area Inc.Store Cum.Store <br /> (feet) (acres) (acre-feet) tacre-feet) <br /> s32.00 o.o�o o.000 o.000 <br /> 934.00 0.024 0.034 0.034 <br /> 935.00 0.040 0.032 0.066 <br /> Device Routinq Invert Outlet Devices <br /> #1 Primary 932.00' 4.0" Round Culvert <br /> L=22.0' CPP, end-section conforming to fill, Ke=0.500 <br /> Outlet Invert= 931.81' S= 0.0086'P Cc=0.900 <br /> n= 0.010 PVC, smooth interior <br /> Primary OutFlow Max=0.21 cfs� 12.17 hrs HW=932.41' (Free Discharge) <br /> 'L1=Culvert (Inlet Controls 0.21 cfs�2.39 fps) <br />