Drainage Report and Supplement 82625

NOAA 24-hr D 10-Year-2020 Rainfall=5.38", P2=3.47" Printed 8/13/2025 Prepared by Stonefield Engineering & Design 2025-08-13_Stormwater Calculations HydroCAD® 10.20-5c s/n 10626 © 2023 HydroCAD Software Solutions LLC Page 19 Subcatchment P-2: Proposed Drainage to Nicholas Avenue Hydrograph Runoff 15 14.11 cfs 14 13 12 11 Flow (cfs) 10 9 8 7 6 5 4 NOAA 24-hr D 10-Year-2020 Rainfall=5.38" P2=3.47" Runoff Area=143,609 sf Runoff Volume=41,628 cf Runoff Depth=3.48" Flow Length=408' Tc=2.8 min CN=77/98 3 2 1 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)