09 Stormwater Mgmt Report 122025

NOAA 24-hr D 100-Year-Future Rainfall=11.52", 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 31 Summary for Subcatchment P1p: Proposed Pervious Runoff = 0.23 cfs @ 12.18 hrs, Volume= Routed to Link P1 : PDA 1A 957 cf, Depth= 2.93" 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 100-Year-Future Rainfall=11.52", P2=4.09" Area (ac) 0.090 0.090 CN 39 39 Description >75% Grass cover, Good, HSG A 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.3 85 0.0500 0.27 Sheet Flow, Grass: Short n= 0.150 P2= 4.09" 0.2 15 0.0400 1.40 Sheet Flow, Smooth surfaces n= 0.011 P2= 4.09" 0.5 121 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 8.1 528 Total Subcatchment P1p: Proposed Pervious Flow (cfs) Hydrograph 0.26 0.25 0.24 0.23 0.22 0.21 0.2 0.19 0.18 0.17 0.16 0.15 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 Runoff 0.23 cfs NOAA 24-hr D 100-Year-Future Rainfall=11.52" P2=4.09" Runoff Area=0.090 ac Runoff Volume=957 cf Runoff Depth=2.93" Flow Length=528' Tc=8.1 min CN=39/0 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)