251203_42 ERW_Stormwater Report

250903_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 11/25/2025 Page 35 Summary for Reach DP2-EX: Inflow Area = Inflow = Outflow = 0.423 ac, 0.00% Impervious, Inflow Depth = 8.17" for 100-Year event 3.70 cfs @ 12.14 hrs, Volume= 0.288 af 3.70 cfs @ 12.14 hrs, Volume= 0.288 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 DP2-EX: Hydrograph 4 Inflow Outflow 3.70 cfs 3.70 cfs Inflow Area=0.423 ac Flow (cfs) 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)