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C:\Program Files�hlydroCAD�ProjectsWydroCAD Projeats\08 JOBS\ <br /> 08175B Barry Sewall Proposed Conditions May 13, 2009 ( Type ll 24hr 2 Year Rainfal1=2.75" <br /> Prepared by Gronberg 8�Associates, Inc. Printed 5/20/2009 9:09:37 AM <br /> HydroCAD�9.00 s/n 04529 �2009 HydroCAD SoRware Solutions LLC Pa�e 9 <br /> Summary for Pond 1 P: Pond 1, Area 2 <br /> Inflow Area= 0.240 ac, 41.67% Impervious, Inflow Depth > 0.67" for 2 Year event <br /> Inflow = 0.27 cfs� 12.02 hrs, Volume= 0.013 af <br /> Outflow = 0.21 cfs(� 12.08 hrs, Volume= 0.013 af, Atten=23%, Lag=4.0 min <br /> Primary = 0.21 cfs(a� 12.08 hrs, Volume= 0.013 af <br /> Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs <br /> Peak Elev= 947.48'(d� 12.08 hrs Surf.Area=0.004 ac Storage=0.001 af <br /> Plug-Flow detention time= 7.2 min calculated for 0.013 af(99%of inflow) <br /> Center-of-Mass det. 6me=4.4 min (822.5-818.1 ) <br /> Volume Invert Avail.Storaae Storage Description <br /> #1 947.00' 0.052 af Custom Stage Data(Prismatic) Listed below(Recalc) <br /> Elevation SurF.Area Inc.Store Cum.Store <br /> (feet) (acres) (acre-feet) (acre-feet) <br /> 947.00 0.002 0.000 0.000 <br /> 948.00 0.0� 0.004 0.004 <br /> 950.00 0.018 0.024 0.028 <br /> 951.00 0.029 0.024 0.052 <br /> Device Routing Invert Outlet Devices <br /> #1 Primary 947.00' 4.0" Round Culvert <br /> L= 124.0' CPP, mitered to conform to filt, Ke=0.700 <br /> Outlet Invert=942.50' S= 0.0363'P C� 0.900 <br /> n= 0.010 PVC, smooth interior <br /> Primary OutFlow Max=0.21 cfs� 12.08 hrs HW=947.48' (Free Discharge) <br /> t-1=Culvert (Inlet Controls 0.21 cfs�2.36 fps) <br />