21 Stormwater Mgmt Report_082025

NOAA 24-hr D 100-Year-Current Rainfall=9.18", P2=3.47" NJA230139 - REV 0 Prepared by Bohler HydroCAD® 10.20-5c s/n 03478 © 2023 HydroCAD Software Solutions LLC Printed 8/6/2025 Page 27 Summary for Subcatchment E1i: Existing Impervious Runoff = 11.78 cfs @ 12.09 hrs, Volume= Routed to Link E1 : EDA 1A 43,484 cf, Depth= 8.94" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 100-Year-Current Rainfall=9.18", P2=3.47" Area (ac) 1.340 1.340 CN 98 98 Tc Length (min) (feet) 0.9 100 Description Paved parking, HSG A 100.00% Impervious Area Slope (ft/ft) 0.0400 Velocity (ft/sec) 1.89 0.1 36 0.0400 4.06 2.1 285 0.0120 2.22 0.1 20 0.6600 4.06 3.2 441 Total Capacity (cfs) Description Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" Shallow Concentrated Flow, Paved Kv= 20.3 fps Shallow Concentrated Flow, Paved Kv= 20.3 fps Shallow Concentrated Flow, Woodland Kv= 5.0 fps Subcatchment E1i: Existing Impervious Hydrograph 13 12 NOAA 24-hr D 100-Year-Current Rainfall=9.18" P2=3.47" Runoff Area=1.340 ac Runoff Volume=43,484 cf Runoff Depth=8.94" Flow Length=441' Tc=3.2 min CN=0/98 11 10 9 8 Flow (cfs) Runoff 11.78 cfs 7 6 5 4 3 2 1 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)