2025 12 19 Stormwater Report Rev 1

13 Hydrograph Report Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Tuesday, 12 / 23 / 2025 Hyd. No. 6 DA-2 Combined Hydrograph type = Combine Peak discharge = 0.271 cfs Storm frequency = 2 yrs Time to peak = 12.20 hrs Time interval = 6 min Hyd. volume = 1,209 cuft Inflow hyds. = 3, 4 Contrib. drain. area = 0.180 ac DA-2 Combined Q (cfs) Q (cfs) Hyd. No. 6 -- 2 Year 0.50 0.50 0.45 0.45 0.40 0.40 0.35 0.35 0.30 0.30 0.25 0.25 0.20 0.20 0.15 0.15 0.10 0.10 0.05 0.05 0.00

0.05 0.00 0.00 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Time (hrs) Hyd No. 6 Hyd No. 3 Hyd No. 4