Drainage Report and Supplement 82625

2025-08-13_Stormwater Calculations NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Prepared by Stonefield Engineering & Design HydroCAD® 10.20-5c s/n 10626 © 2023 HydroCAD Software Solutions LLC Printed 8/13/2025 Page 28 Subcatchment P-2: Proposed Drainage to Nicholas Avenue Hydrograph Runoff 30 27.62 cfs 28 26 24 22 Flow (cfs) 20 18 16 14 12 10 NOAA 24-hr D 100-Year-2020 Rainfall=9.18" P2=3.47" Runoff Area=143,609 sf Runoff Volume=83,679 cf Runoff Depth=6.99" Flow Length=408' Tc=2.8 min CN=77/98 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)