251203_42 ERW_Stormwater Report

251202_42 ERW Waystone - Future Rainfall NOAA 24-hr D 100-Year Rainfall=11.52" Printed 12/3/2025 Page 85 Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Pond BASIN: Time (hours) 0.00 2.50 5.00 7.50 10.00 12.50 15.00 17.50 20.00 22.50 25.00 27.50 30.00 32.50 35.00 37.50 40.00 42.50 45.00 47.50 50.00 52.50 55.00 57.50 60.00 62.50 65.00 67.50 70.00 Inflow (cfs) 0.00 0.11 0.21 0.43 1.05 5.44 0.97 0.60 0.46 0.37 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Storage Elevation (acre-feet) (feet) 0.000 15.00 0.002 15.03 0.004 15.06 0.028 15.41 0.103 16.11 0.467 18.99 0.166 16.56 0.105 16.13 0.093 16.04 0.087 16.01 0.063 15.84 0.018 15.27 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 0.000 15.00 Outflow (cfs) 0.00 0.11 0.17 0.20 0.66 8.45 1.48 0.71 0.49 0.40 0.24 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Discarded (cfs) 0.00 0.11 0.17 0.20 0.26 0.51 0.30 0.26 0.26 0.25 0.24 0.19 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Primary (cfs) 0.00 0.00 0.00 0.00 0.40 7.94 1.18 0.45 0.23 0.15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00