complete drainage report rev 9

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 34 Summary for Pond 1FT: 4x4 FT Inflow Area = Inflow = Outflow = Primary = 4,204 sf, 22.91% Impervious, Inflow Depth = 0.37" for WQ event 0.10 cfs @ 1.12 hrs, Volume= 130 cf 0.10 cfs @ 1.12 hrs, Volume= 130 cf, Atten= 0%, Lag= 0.0 min 0.10 cfs @ 1.12 hrs, Volume= 130 cf Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 0.01' @ 1.12 hrs Surf.Area= 16 sf Storage= 0 cf Plug-Flow detention time= 0.0 min calculated for 130 cf (100% of inflow) Center-of-Mass det. time= 0.0 min ( 74.2 - 74.2 ) Volume #1 Device #1 Invert 0.00' Routing Primary Avail.Storage 12 cf Invert 0.00' Storage Description 4.00'W x 4.00'L x 0.75'H Prismatoid Outlet Devices 300.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.11 cfs @ 1.12 hrs HW=0.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.11 cfs @ 0.01 fps) Pond 1FT: 4x4 FT Hydrograph 0.10 cfs 0.11 0.105 0.10 cfs 0.1 0.095 0.09 0.085 0.08 0.075 0.07 0.065 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours) Flow (cfs) Inflow Area=4,204 sf Peak Elev=0.01' Storage=0 cf Inflow Primary