251203_42 ERW_Stormwater Report

251202_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC NJ DEP 2-hr WQ Rainfall=1.25" Printed 12/3/2025 Page 88 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PR 1A-P: Runoff Area=13,167 sf 0.00% Impervious Runoff Depth=0.13" Flow Length=203' Tc=5.9 min CN=78 Runoff=0.11 cfs 0.003 af Subcatchment PR 1B-I: Runoff Area=36,906 sf 100.00% Impervious Runoff Depth=1.03" Flow Length=136' Tc=1.5 min CN=98 Runoff=2.63 cfs 0.073 af Subcatchment PR 1B-P: Runoff Area=77,195 sf 0.00% Impervious Runoff Depth=0.15" Flow Length=195' Tc=7.7 min CN=79 Runoff=0.65 cfs 0.023 af Subcatchment PR 2-P: Runoff Area=7,405 sf 0.00% Impervious Runoff Depth=0.10" Flow Length=84' Slope=0.0833 '/' Tc=4.6 min CN=76 Runoff=0.04 cfs 0.001 af Reach 10R: Inflow=2.66 cfs 0.096 af Outflow=2.66 cfs 0.096 af Reach DP1-PR: Inflow=0.11 cfs 0.003 af Outflow=0.11 cfs 0.003 af Reach DP2-PR: Inflow=0.04 cfs 0.001 af Outflow=0.04 cfs 0.001 af Pond BASIN: Peak Elev=15.89' Storage=0.071 af Inflow=2.66 cfs 0.096 af Discarded=0.24 cfs 0.096 af Primary=0.00 cfs 0.000 af Outflow=0.24 cfs 0.096 af Total Runoff Area = 3.092 ac Runoff Volume = 0.100 af Average Runoff Depth = 0.39" 72.60% Pervious = 2.244 ac 27.40% Impervious = 0.847 ac