21 Stormwater Mgmt Report_082025

NOAA 24-hr D 25-Year-Future Rainfall=8.02", P2=3.47" NJA230139 - REV 0 Prepared by Bohler HydroCAD® 10.20-5c s/n 03478 © 2023 HydroCAD Software Solutions LLC Printed 8/6/2025 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=1.340 ac 100.00% Impervious Runoff Depth=7.78" Flow Length=441' Tc=3.2 min CN=0/98 Runoff=10.29 cfs 37,844 cf Subcatchment E1i: Existing Impervious Subcatchment E1p: Existing Pervious 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 P1i: Proposed Impervious Runoff Area=1.000 ac 100.00% Impervious Runoff Depth=7.78" Flow Length=443' Tc=3.1 min CN=0/98 Runoff=7.68 cfs 28,242 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=10.30 cfs 37,929 cf Primary=10.30 cfs 37,929 cf Link P1: PDA 1A Inflow=9.18 cfs 35,224 cf Primary=9.18 cfs 35,224 cf Total Runoff Area = 118,483 sf Runoff Volume = 74,177 cf Average Runoff Depth = 7.51" 4.04% Pervious = 4,792 sf 95.96% Impervious = 113,692 sf