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 43 Summary for Pond 14FT: 7.83x4.5 FT Inflow Area = Inflow = Outflow = Primary = 2,943 sf,100.00% Impervious, Inflow Depth = 1.03" for WQ event 0.21 cfs @ 1.08 hrs, Volume= 254 cf 0.21 cfs @ 1.08 hrs, Volume= 254 cf, Atten= 0%, Lag= 0.0 min 0.21 cfs @ 1.08 hrs, Volume= 254 cf Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs / 2 Peak Elev= 0.01' @ 1.08 hrs Surf.Area= 35 sf Storage= 0 cf Plug-Flow detention time= 0.0 min calculated for 254 cf (100% of inflow) Center-of-Mass det. time= 0.0 min ( 65.8 - 65.7 ) Volume #1 Device #1 Invert 0.00' Routing Primary Avail.Storage 26 cf Invert 0.00' Storage Description 7.83'W x 4.50'L x 0.75'H Prismatoid Outlet Devices 300.000 in/hr Exfiltration over Surface area Primary OutFlow Max=0.24 cfs @ 1.08 hrs HW=0.01' (Free Discharge) 1=Exfiltration (Exfiltration Controls 0.24 cfs @ 0.01 fps) Pond 14FT: 7.83x4.5 FT Hydrograph 0.23 0.21 cfs 0.22 0.21 cfs 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 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=2,943 sf Peak Elev=0.01' Storage=0 cf Inflow Primary