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 26 Time span=0.00-72.00 hrs, dt=0.10 hrs, 721 points x 9 Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment E1i: Existing Impervious Runoff Area=1.930 ac 100.00% Impervious Runoff Depth=11.28" Flow Length=441' Tc=3.1 min CN=0/98 Runoff=21.32 cfs 79,017 cf Runoff Area=0.020 ac 0.00% Impervious Runoff Depth=2.93" Flow Length=526' Tc=8.2 min CN=39/0 Runoff=0.05 cfs 213 cf Subcatchment E1p: Existing Pervious Subcatchment P1i: Proposed Impervious Runoff Area=1.600 ac 100.00% Impervious Runoff Depth=11.28" Flow Length=443' Tc=3.0 min CN=0/98 Runoff=17.68 cfs 65,506 cf Runoff Area=0.270 ac 100.00% Impervious Runoff Depth=11.28" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 Runoff=2.60 cfs 11,054 cf Subcatchment P1i(pp): Proposed Subcatchment P1p: Proposed Pervious Pond PP1: Pervious Pavement Runoff Area=0.090 ac 0.00% Impervious Runoff Depth=2.93" Flow Length=528' Tc=8.1 min CN=39/0 Runoff=0.23 cfs 957 cf Peak Elev=367.26' Storage=2,077 cf Inflow=2.60 cfs 11,054 cf Outflow=2.20 cfs 10,030 cf Link E1: EDA 1A Inflow=21.36 cfs 79,230 cf Primary=21.36 cfs 79,230 cf Link P1: PDA 1A Inflow=20.04 cfs 76,493 cf Primary=20.04 cfs 76,493 cf Total Runoff Area = 170,320 sf Runoff Volume = 156,748 cf Average Runoff Depth = 11.04" 2.81% Pervious = 4,792 sf 97.19% Impervious = 165,528 sf