Stormwater Management Report Revised as of 01282026 4936 0314 8685 v2

24-223 DRAINAGE DESIGN-EXISTING-UPDATE NOAA 24-hr D 2-Year-2020 Rainfall=3.47", P2=3.47" Prepared by Jarmel Kizel Architects & Engnrs Printed 1/28/2026 HydroCAD® 10.20-6a s/n 12607 © 2024 HydroCAD Software Solutions LLC Page 10 Subcatchment E1C: E1C Pervious-w-offsite-Undisturbed Hydrograph 0.48 Runoff 0.46 0.44 cfs 0.44 0.42 NOAA 24-hr D 0.4 0.38 2-Year-2020 Rainfall=3.47" 0.36 0.34 P2=3.47" 0.32 0.3 Runoff Area=38,775 sf Runoff Volume=3,559 cf Flow (cfs) 0.28 0.26 0.24 Runoff Depth=1.10" 0.22 0.2 Flow Length=668' 0.18 0.16 Tc=13.6 min 0.14 0.12 CN=72 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 Time (hours)