V4 11 Stormwater Report Rev 3 1 26 2023

76 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2023 Friday, 01 / 27 / 2023 Hyd. No. 4 DA-3 (Pervious) Hydrograph type = SCS Runoff Peak discharge = 26.10 cfs Storm frequency = 100 yrs Time to peak = 12.15 hrs Time interval = 3 min Hyd. volume = 105,761 cuft Drainage area = 5.520 ac Curve number = 72* Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 14.50 min Total precip. = 8.66 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2019\19 Shape factor 0265 Daughters = 484 of Israel - West Oran * Composite (Area/CN) = [(0.010 x 30) + (4.210 x 70) + (0.340 x 77) + (0.400 x 74) + (0.560 x 80)] / 5.520 DA-3 (Pervious) Q (cfs) Q (cfs) Hyd. No. 4 -- 100 Year 28.00 28.00 24.00 24.00 20.00 20.00 16.00 16.00 12.00 12.00 8.00

12.00 8.00 8.00 4.00 4.00 0.00 0.00 0 3 6 9 12 15 18 21 24 27 Time (hrs) Hyd No. 4