21 Stormwater Mgmt Report_082025

NOAA 24-hr D 2-Year-Current Rainfall=3.47", 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 9 Summary for Subcatchment P1i: Proposed Impervious Runoff = 3.30 cfs @ 12.09 hrs, Volume= Routed to Link P1 : PDA 1A 11,749 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) 1.000 1.000 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 2.0 287 0.0140 2.40 0.1 20 0.6600 4.06 3.1 443 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 P1i: Proposed Impervious Hydrograph Runoff 3.30 cfs NOAA 24-hr D 2-Year-Current Rainfall=3.47" P2=3.47" Runoff Area=1.000 ac Runoff Volume=11,749 cf Runoff Depth=3.24" Flow Length=443' Tc=3.1 min CN=0/98 Flow (cfs) 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)