09 Stormwater Mgmt Report 122025

NOAA 24-hr D 2-Year-Current Rainfall=3.47", P2=3.47" NJA230139 - REV 2 Prepared by Bohler Engineering, PC HydroCAD® 10.20-7a s/n 03478 © 2025 HydroCAD Software Solutions LLC Printed 12/11/2025 Page 7 Summary for Subcatchment E1i: Existing Impervious Runoff = 6.36 cfs @ 12.09 hrs, Volume= Routed to Link E1 : EDA 1A 22,675 cf, Depth= 3.24" 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 2-Year-Current Rainfall=3.47", P2=3.47" Area (ac) 1.930 1.930 CN 98 98 Description Paved parking, HSG A 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.9 100 0.0400 1.89 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.1 36 0.0400 4.06 Shallow Concentrated Flow, Paved Kv= 20.3 fps 2.1 285 0.0120 2.22 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 20 0.6600 4.06 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.2 441 Total Subcatchment E1i: Existing Impervious Hydrograph 7 NOAA 24-hr D 2-Year-Current Rainfall=3.47" P2=3.47" Runoff Area=1.930 ac Runoff Volume=22,675 cf Runoff Depth=3.24" Flow Length=441' Tc=3.2 min CN=0/98 6 5 Flow (cfs) Runoff 6.36 cfs 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)