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 27 Summary for Subcatchment 17p: Perv Runoff = 0.02 cfs @ 1.09 hrs, Volume= Routed to Pond 17FT : 8x6 FT 17 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) 1,159 1,159 Tc (min) 0.7 Length (feet) 100 0.9 200 1.6 300 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0700 2.36 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0360 3.85 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 17p: Perv Hydrograph 0.02 0.02 cfs 0.019 0.018 Flow (cfs) 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 Runoff NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=1,159 sf Runoff Volume=17 cf Runoff Depth=0.17" Flow Length=300' Tc=1.6 min CN=80 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)