2025 12 19 Stormwater Report Rev 1

23 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 5 DA-1 Combined Hydrograph type = Combine Peak discharge = 15.35 cfs Storm frequency = 10 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 73,038 cuft Inflow hyds. = 1, 2 Contrib. drain. area = 4.680 ac DA-1 Combined Q (cfs) Q (cfs) Hyd. No. 5 -- 10 Year 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 3.00 0.00 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 5 Hyd No. 1 Hyd No. 2