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� <br /> .• <br /> C:�Program FileslHydroCAD\Pro�ects\HydroCAD Pro�ects\08 JOBS\ <br /> 081756 Barry Sewall Existing Conditions May 73, 2009 Type 1124-hr 100 Year Rainfalt=6.00" <br /> Prepared by Gronberg &Associates, inc. Printed 5/19/2009 4:17:13 PM <br /> H•�droCHD�9 00 s/n 04529 �2009 HydroCAD Soitware Solutions LLC PaQe 23 <br /> Summary for Pond D1: Depression <br /> Inflow Area= 1.060 ac, 9.43% impervious, Inflow Depth > 1.65" for 100 Year event <br /> Inflow = 2.86 afs a� 12.03 hrs, Volume= 0.146 af <br /> Outflow = 0.20 cfs cLD 13.25 hrs, Volume= 0.069 af, Atten= 93%, Lag=73.6 min <br /> Primary = 0.20 cfs� 13.25 hrs, Volume= 0.069 af <br /> Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs <br /> Peak Elev= 948.21'� 13.25 hrs Surf.Area= 0.097 ac Storage= 0.083 af <br /> Plug-Flow detention time= 208.0 min calculated for 0.069 af(47% of inflow) <br /> Center-of-Mass det. time= 116.0 min (930.1 - 814.0) <br /> Volume Invert Avail Storage Storage Description <br /> #1 947.00' 0.330 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 0.040 0.000 0.000 <br /> 950.00 0.180 0.330 0.330 <br /> Device Routing Invert Outlet Devices <br /> #1 Primary 948.10' 2.0'long x 66.0'breadth Broad-Crested Rectangular Weir <br /> Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 <br /> Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 <br /> Primary OutFlow Max=0.20 cfs(a� 13.25 hrs HW=948.21' (Free Discharge) <br /> L1=Broad-Crested Rectangular Weir (Weir Controls 0.20 cfs�0.90 fps) <br />