09 Stormwater Mgmt Report 122025

NOAA 24-hr D 10-Year-Current Rainfall=5.38", 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 19 Summary for Subcatchment P1i: Proposed Impervious Runoff = 8.22 cfs @ 12.09 hrs, Volume= Routed to Link P1 : PDA 1A 29,868 cf, Depth= 5.14" 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 10-Year-Current Rainfall=5.38", P2=3.47" Area (ac) 1.600 1.600 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 2.0 287 0.0140 2.40 Shallow Concentrated Flow, Paved Kv= 20.3 fps 0.1 20 0.6600 4.06 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 3.1 443 Total Subcatchment P1i: Proposed Impervious Hydrograph 9 NOAA 24-hr D 10-Year-Current Rainfall=5.38" P2=3.47" Runoff Area=1.600 ac Runoff Volume=29,868 cf Runoff Depth=5.14" Flow Length=443' Tc=3.1 min CN=0/98 8 7 6 Flow (cfs) Runoff 8.22 cfs 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)