251203_42 ERW_Stormwater Report

251202_42 ERW Waystone - Future Rainfall NOAA 24-hr D 2-Year Rainfall=4.09" Prepared by Colliers Engineering & Design HydroCAD® 10.20-5c s/n 04431 © 2023 HydroCAD Software Solutions LLC Hydrograph for Subcatchment PR 1B-P: Time Precip. Excess (hours) (inches) (inches) 0.00 0.00 0.00 1.00 0.05 0.00 2.00 0.10 0.00 3.00 0.15 0.00 4.00 0.21 0.00 5.00 0.28 0.00 6.00 0.35 0.00 7.00 0.43 0.00 8.00 0.53 0.00 9.00 0.65 0.00 10.00 0.81 0.03 11.00 1.06 0.09 12.00 1.96 0.50 13.00 3.03 1.21 14.00 3.28 1.40 15.00 3.44 1.52 16.00 3.56 1.61 17.00 3.66 1.69 18.00 3.74 1.76 19.00 3.81 1.81 20.00 3.88 1.86 21.00 3.94 1.91 22.00 3.99 1.96 23.00 4.04 2.00 24.00 4.09 2.04 25.00 4.09 2.04 26.00 4.09 2.04 27.00 4.09 2.04 28.00 4.09 2.04 29.00 4.09 2.04 30.00 4.09 2.04 31.00 4.09 2.04 32.00 4.09 2.04 33.00 4.09 2.04 34.00 4.09 2.04 35.00 4.09 2.04 36.00 4.09 2.04 37.00 4.09 2.04 38.00 4.09 2.04 39.00 4.09 2.04 40.00 4.09 2.04 41.00 4.09 2.04 42.00 4.09 2.04 43.00 4.09 2.04 44.00 4.09 2.04 45.00 4.09 2.04 46.00 4.09 2.04 47.00 4.09 2.04 48.00 4.09 2.04 49.00 4.09 2.04 50.00 4.09 2.04 51.00 4.09 2.04 Runoff (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.06 0.17 1.77 0.54 0.27 0.19 0.15 0.13 0.11 0.10 0.09 0.08 0.08 0.07 0.07 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 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Time Precip. Excess (hours) (inches) (inches) 52.00 4.09 2.04 53.00 4.09 2.04 54.00 4.09 2.04 55.00 4.09 2.04 56.00 4.09 2.04 57.00 4.09 2.04 58.00 4.09 2.04 59.00 4.09 2.04 60.00 4.09 2.04 61.00 4.09 2.04 62.00 4.09 2.04 63.00 4.09 2.04 64.00 4.09 2.04 65.00 4.09 2.04 66.00 4.09 2.04 67.00 4.09 2.04 68.00 4.09 2.04 69.00 4.09 2.04 70.00 4.09 2.04 71.00 4.09 2.04 72.00 4.09 2.04 Runoff (cfs) 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 0.00 0.00 Printed 12/3/2025 Page 10