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C:�Program FilesU-IydroCAD�Projects�FiydroCAD ProjectsW8 JOBS\ <br /> 08175B Barry Sewall Proposed Conditions Type 1124-hr 2 Year Rainfa11=2.75" <br /> Prepared by Gronberg &Associates, Inc. Page 5 <br /> HydroCAD�8.00 s/n 004529 �2006 HydroCAD Software Solutions LLC 11/13/2008 4:11:12 PM <br /> Area (ac) CN Description <br /> 0.170 98 Paved parking&roofs <br /> 0.110 98 Paved parking&roofs <br /> 0.110 98 Paved parking& roofs <br /> 0.650 61 >75%Grass cover, Good, HSG B <br /> 0.360 55 Woods Good HSG B <br /> 1.400 70 Weighted Average <br /> 1.010 Pervious Area <br /> 0.390 Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) �et� (ff/ft) (ff/sec) (cfs) <br /> 12.0 Direct EMry, <br /> Pond D1: Depression <br /> Inflow Area= 1.060 ac, Inflow Depth> 0.18" for 2 Year event <br /> Inflow = 0.16 cfs a� 12.07 hrs, Volume= 0.016 af <br /> Outflow = 0.00 cfs� 5.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min <br /> Primary = 0.00 cfs @ 5.00 hrs, Volume= 0.000 af <br /> Routing by Stor-Ind method, Time Span=5.00-20.00 hrs, dt=0.05 hrs <br /> Peak Elev= 947.34'@ 20.00 hrs Surf.Area=0.056 ac Storage= 0.016 af <br /> Plug-Flow detention time= (not calculated: initial storage excedes outflow) <br /> Center-of-Mass det. time= (not calculated: no outflow) <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 /> (feefl (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 OuUet Devices <br /> #1 Primary 948.10' 66.0'long x 2.0'breadth Broad-Cr�ested Rectangular Weir <br /> Head(feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 <br /> 3.00 3.50 <br /> Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 <br /> 3.07 3.20 3.32 <br /> Primary OutFlow Max=0.00 cfs a�5.00 hrs HW=947.00' (Free Discharge) <br /> t-1=Broad-Crested Rectangular Weir (Controls 0.00 cfs) <br />