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 23 Summary for Subcatchment 15p: Perv Runoff = 0.01 cfs @ 1.08 hrs, Volume= Routed to Pond 15FT : 4x4 FT 5 cf, Depth= 0.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 368 368 Tc (min) 0.4 Length (feet) 60 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0790 2.24 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" Subcatchment 15p: Perv Hydrograph 0.007 Runoff 0.01 cfs 0.007 0.006 0.005 0.005 Flow (cfs) 0.004 0.004 0.003 0.003 0.002 0.002 0.001 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=368 sf Runoff Volume=5 cf Runoff Depth=0.17" Flow Length=60' Slope=0.0790 '/' Tc=0.4 min CN=80 0.001 0.000 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)