251203_42 ERW_Stormwater Report

251202_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 12/3/2025 Page 78 Summary for Reach DP1-PR: Inflow Area = Inflow = Outflow = 2.922 ac, 29.00% Impervious, Inflow Depth = 7.28" for 100-Year event 14.42 cfs @ 12.22 hrs, Volume= 1.772 af 14.42 cfs @ 12.22 hrs, Volume= 1.772 af, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Reach DP1-PR: Hydrograph 16 Inflow Outflow 14.42 cfs 15 14.42 cfs 14 Inflow Area=2.922 ac 13 12 11 Flow (cfs) 10 9 8 7 6 5 4 3 2 1 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)