09 Stormwater Mgmt Report 122025

NOAA 24-hr D 25-Year-Future Rainfall=8.02", 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 36 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 Runoff Area=1.930 ac 100.00% Impervious Runoff Depth=7.78" Flow Length=441' Tc=3.2 min CN=0/98 Runoff=14.82 cfs 54,507 cf Subcatchment E1i: Existing Impervious Runoff Area=0.020 ac 0.00% Impervious Runoff Depth=1.17" Flow Length=526' Tc=8.6 min CN=39/0 Runoff=0.02 cfs 85 cf Subcatchment E1p: Existing Pervious Subcatchment P1i: Proposed Impervious Runoff Area=1.600 ac 100.00% Impervious Runoff Depth=7.78" Flow Length=443' Tc=3.1 min CN=0/98 Runoff=12.29 cfs 45,187 cf Runoff Area=0.270 ac 100.00% Impervious Runoff Depth=7.78" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 Runoff=1.81 cfs 7,625 cf Subcatchment P1i(pp): Proposed Subcatchment P1p: Proposed Pervious Pond PP1: Pervious Pavement Runoff Area=0.090 ac 0.00% Impervious Runoff Depth=1.17" Flow Length=528' Tc=8.5 min CN=39/0 Runoff=0.07 cfs 381 cf Peak Elev=367.19' Storage=1,832 cf Inflow=1.81 cfs 7,625 cf Outflow=1.49 cfs 6,601 cf Link E1: EDA 1A Inflow=14.83 cfs 54,592 cf Primary=14.83 cfs 54,592 cf Link P1: PDA 1A Inflow=13.79 cfs 52,169 cf Primary=13.79 cfs 52,169 cf Total Runoff Area = 170,320 sf Runoff Volume = 107,785 cf Average Runoff Depth = 7.59" 2.81% Pervious = 4,792 sf 97.19% Impervious = 165,528 sf