09 Stormwater Mgmt Report 122025

NOAA 24-hr D 10-Year-Future Rainfall=6.37", P2=4.09" 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 = 9.76 cfs @ 12.08 hrs, Volume= Routed to Link P1 : PDA 1A 35,612 cf, Depth= 6.13" 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-Future Rainfall=6.37", P2=4.09" 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) 0.8 100 0.0400 2.05 Sheet Flow, Smooth surfaces n= 0.011 P2= 4.09" 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 3.0 443 Total Subcatchment P1i: Proposed Impervious Hydrograph Runoff 9.76 cfs 10 NOAA 24-hr D 10-Year-Future Rainfall=6.37" P2=4.09" Runoff Area=1.600 ac Runoff Volume=35,612 cf Runoff Depth=6.13" Flow Length=443' Tc=3.0 min CN=0/98 9 8 Flow (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)