V4 11 Stormwater Report Rev 3 1 26 2023

49 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 6 DA-4 (Pervious) Hydrograph type = SCS Runoff Peak discharge = 3.696 cfs Storm frequency = 10 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 17,827 cuft Drainage area = 4.780 ac Curve number = 54* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 14.30 min Total precip. = 5.22 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2019\19 Shape factor 0265 Daughters = 484 of Israel - West Oran * Composite (Area/CN) = [(2.140 x 30) + (1.440 x 70) + (0.360 x 74) + (0.840 x 80)] / 4.780 DA-4 (Pervious) Q (cfs) Q (cfs) Hyd. No. 6 -- 10 Year 4.00 4.00 3.00 3.00 2.00 2.00 1.00 1.00 0.00 0.00 0 3 6 9 12 15 18 21 24 27

0.00 0 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 6