251203_42 ERW_Stormwater Report

NOAA 24-hr D 2-Year Rainfall=4.09" 251202_42 ERW Waystone - Future Rainfall Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Printed 12/3/2025 Page 17 Summary for Reach DP2-PR: Inflow Area = Inflow = Outflow = 0.170 ac, 0.00% Impervious, Inflow Depth = 1.81" for 2-Year event 0.37 cfs @ 12.11 hrs, Volume= 0.026 af 0.37 cfs @ 12.11 hrs, Volume= 0.026 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-PR: Flow (cfs) Hydrograph 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Outflow 0.37 cfs 0.37 cfs Inflow Area=0.170 ac 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)