Graham Place Subdivision <br />Type IA 24-hr 10-Year Rainfall=4.46"5468_HydroCAD_2-17-26_BAW <br /> Printed 7/9/2026Prepared by A&O Engineering LLC <br />Page 10HydroCAD® 10.20-8a s/n 04993 © 2025 HydroCAD Software Solutions LLC <br />Hydrograph for Subcatchment 1489S: Existing Conditions <br />Time <br />(hours) <br />Precip. <br />(inches) <br />Perv.Excess <br />(inches) <br />Imp.Excess <br />(inches) <br />Runoff <br />(cfs) <br />0.00 0.00 0.00 0.00 0.00 <br />1.00 0.09 0.00 0.01 0.00 <br />2.00 0.22 0.00 0.09 0.02 <br />3.00 0.37 0.00 0.20 0.02 <br />4.00 0.52 0.00 0.33 0.03 <br />5.00 0.70 0.00 0.50 0.04 <br />6.00 0.92 0.03 0.71 0.08 <br />7.00 1.20 0.10 0.98 0.13 <br />8.00 1.90 0.39 1.67 0.62 <br />9.00 2.32 0.63 2.09 0.27 <br />10.00 2.57 0.79 2.34 0.19 <br />11.00 2.78 0.92 2.55 0.17 <br />12.00 2.96 1.04 2.73 0.15 <br />13.00 3.13 1.16 2.89 0.14 <br />14.00 3.28 1.27 3.05 0.14 <br />15.00 3.43 1.38 3.20 0.13 <br />16.00 3.57 1.48 3.34 0.13 <br />17.00 3.71 1.59 3.47 0.12 <br />18.00 3.83 1.68 3.60 0.12 <br />19.00 3.96 1.78 3.72 0.11 <br />20.00 4.07 1.87 3.84 0.11 <br />21.00 4.18 1.95 3.94 0.10 <br />22.00 4.28 2.03 4.04 0.10 <br />23.00 4.37 2.11 4.14 0.09 <br />24.00 4.46 2.18 4.22 0.08 <br />25.00 4.46 2.18 4.22 0.00 <br />26.00 4.46 2.18 4.22 0.00 <br />27.00 4.46 2.18 4.22 0.00 <br />28.00 4.46 2.18 4.22 0.00 <br />29.00 4.46 2.18 4.22 0.00 <br />30.00 4.46 2.18 4.22 0.00 <br />31.00 4.46 2.18 4.22 0.00 <br />32.00 4.46 2.18 4.22 0.00 <br />33.00 4.46 2.18 4.22 0.00 <br />34.00 4.46 2.18 4.22 0.00 <br />35.00 4.46 2.18 4.22 0.00 <br />36.00 4.46 2.18 4.22 0.00 <br />37.00 4.46 2.18 4.22 0.00 <br />38.00 4.46 2.18 4.22 0.00 <br />39.00 4.46 2.18 4.22 0.00 <br />40.00 4.46 2.18 4.22 0.00 <br />41.00 4.46 2.18 4.22 0.00 <br />42.00 4.46 2.18 4.22 0.00 <br />43.00 4.46 2.18 4.22 0.00 <br />44.00 4.46 2.18 4.22 0.00 <br />45.00 4.46 2.18 4.22 0.00 <br />46.00 4.46 2.18 4.22 0.00 <br />47.00 4.46 2.18 4.22 0.00 <br />48.00 4.46 2.18 4.22 0.00