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 10 Summary for Subcatchment P1i(pp): Proposed Impervious Runoff = 0.77 cfs @ 12.04 hrs, Volume= Routed to Pond PP1 : Pervious Pavement 3,172 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) 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 1.00 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" Subcatchment P1i(pp): Proposed Impervious Hydrograph 0.85 NOAA 24-hr D 2-Year-Current Rainfall=3.47" P2=3.47" Runoff Area=0.270 ac Runoff Volume=3,172 cf Runoff Depth=3.24" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 0.75 0.7 0.65 0.6 0.55 Flow (cfs) Runoff 0.77 cfs 0.8 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 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)