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 ------ ------- 2.693 ------- ------- 5.194 ------- ------- 10.95 DA-1 Pervious 2 SCS Runoff ------ ------- 8.352 ------- ------- 13.07 ------- ------- 23.70 DA-1 Impervious 3 SCS Runoff ------ ------- 0.237 ------- ------- 0.457 ------- ------- 0.964 DA-1 Pervious 4 SCS Runoff ------ ------- 0.108 ------- ------- 0.169 ------- ------- 0.307 DA-2 Impervious 5 Combine 1, 2, ------- 11.05 ------- ------- 18.27 ------- ------- 34.65 <no description> 6 Combine 3, 4, ------- 0.345 ------- ------- 0.627 ------- ------- 1.271 <no description> Proj. file: Proposed - Future Projected.gpw Tuesday, 12 / 23 / 2025