21 Stormwater Mgmt Report_082025

NOAA 24-hr D 10-Year-Current Rainfall=5.38", 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 16 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=5.14" Flow Length=441' Tc=3.2 min CN=0/98 Runoff=6.89 cfs 25,015 cf Subcatchment E1i: Existing Impervious Subcatchment E1p: Existing Pervious Runoff Area=0.020 ac 0.00% Impervious Runoff Depth=0.28" Flow Length=526' Tc=8.6 min CN=39/0 Runoff=0.00 cfs 21 cf Subcatchment P1i: Proposed Impervious Runoff Area=1.000 ac 100.00% Impervious Runoff Depth=5.14" Flow Length=443' Tc=3.1 min CN=0/98 Runoff=5.14 cfs 18,668 cf Runoff Area=0.270 ac 100.00% Impervious Runoff Depth=5.14" Flow Length=30' Slope=0.0150 '/' Tc=0.5 min CN=0/98 Runoff=1.21 cfs 5,040 cf Subcatchment P1i(pp): Proposed Subcatchment P1p: Proposed Pervious Pond PP1: Pervious Pavement Runoff Area=0.090 ac 0.00% Impervious Runoff Depth=0.28" Flow Length=528' Tc=8.5 min CN=39/0 Runoff=0.01 cfs 93 cf Peak Elev=367.13' Storage=1,626 cf Inflow=1.21 cfs 5,040 cf Outflow=0.96 cfs 4,016 cf Link E1: EDA 1A Inflow=6.89 cfs 25,035 cf Primary=6.89 cfs 25,035 cf Link P1: PDA 1A Inflow=6.07 cfs 22,776 cf Primary=6.07 cfs 22,776 cf Total Runoff Area = 118,483 sf Runoff Volume = 48,836 cf Average Runoff Depth = 4.95" 4.04% Pervious = 4,792 sf 95.96% Impervious = 113,692 sf