2025 12 19 Stormwater Report Rev 1

30 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 3 DA-2 Pervious Hydrograph type = SCS Runoff Peak discharge = 0.734 cfs Storm frequency = 100 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 3,211 cuft Drainage area = 0.140 ac Curve number = 80 Basin Slope = 0.0 % Hydraulic length = 0 ft Tc method = User Time of conc. (Tc) = 11.80 min Total precip. = 9.18 in Distribution = Custom Storm duration = S:\Petry Engineering Cad Projects\2024\24-170 Shape factor - Baginski = 484 - Manor - West Orange DA-2 Pervious Q (cfs) Q (cfs) Hyd. No. 3 -- 100 Year 1.00 1.00 0.90 0.90 0.80 0.80 0.70 0.70 0.60 0.60 0.50 0.50 0.40 0.40 0.30

0.50 0.40 0.40 0.30 0.30 0.20 0.20 0.10 0.10 0.00 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 3