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 7 Summary for Subcatchment 3p: Perv Runoff = 0.02 cfs @ 1.08 hrs, Volume= Routed to Pond 3FT : 6x4 FT 20 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) 1,368 1,368 Tc (min) 0.7 Length (feet) 100 0.0 15 0.7 115 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0680 2.34 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.1170 6.94 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 3p: Perv Flow (cfs) Hydrograph 0.025 0.024 0.02 cfs 0.023 0.022 0.021 0.02 0.019 0.018 0.017 0.016 0.015 0.014 0.013 0.012 0.011 0.01 0.009 0.008 0.007 0.006 0.005 0.004 0.003 0.002 0.001 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) NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=1,368 sf Runoff Volume=20 cf Runoff Depth=0.17" Flow Length=115' Tc=0.7 min CN=80 Runoff