2025 12 19 Stormwater Report Rev 1

2 Hydrograph Return Period Recap Hydraflow Hydrographs Extension for Autodesk® Civil 3D® by Autodesk, Inc. v2025 Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph No. type hyd(s) Description (origin) 1-yr 2-yr 3-yr 5-yr 10-yr 25-yr 50-yr 100-yr 1 SCS Runoff ------ ------- 1.749 ------- ------- 3.502 ------- ------- 7.132 DA-1 Pervious 2 SCS Runoff ------ ------- 7.590 ------- ------- 11.85 ------- ------- 20.28 DA-1 Impervious 3 SCS Runoff ------ ------- 0.180 ------- ------- 0.361 ------- ------- 0.734 DA-2 Pervious 4 SCS Runoff ------ ------- 0.091 ------- ------- 0.143 ------- ------- 0.244 DA-2 Impervious 5 Combine 1, 2, ------- 9.339 ------- ------- 15.35 ------- ------- 27.41 DA-1 Combined 6 Combine 3, 4, ------- 0.271 ------- ------- 0.503 ------- ------- 0.978 DA-2 Combined Proj. file: Existing - Current Adjusted.gpw Tuesday, 12 / 23 / 2025