09 Stormwater Mgmt Report 122025

NOAA 24-hr D 2-Year-Future Rainfall=4.09", 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 10 Summary for Subcatchment P1i(pp): Proposed Impervious Runoff = 0.92 cfs @ 12.04 hrs, Volume= Routed to Pond PP1 : Pervious Pavement 3,778 cf, Depth= 3.85" 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-Future Rainfall=4.09", P2=4.09" Area (ac) 0.270 0.270 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) 0.5 30 0.0150 1.09 Sheet Flow, Smooth surfaces n= 0.011 P2= 4.09" Subcatchment P1i(pp): Proposed Impervious Hydrograph 1 Runoff 0.92 cfs Flow (cfs) NOAA 24-hr D 2-Year-Future Rainfall=4.09" P2=4.09" Runoff Area=0.270 ac Runoff Volume=3,778 cf Runoff Depth=3.85" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 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)