Stormwater Management Report Revised as of 01282026 4936 0314 8685 v2

24-223 DRAINAGE DESIGN-EXISTING-UPDATE NOAA 24-hr D 2-Year-2050 Rainfall=4.09", P2=4.09" Prepared by Jarmel Kizel Architects & Engnrs Printed 1/28/2026 HydroCAD® 10.20-6a s/n 12607 © 2024 HydroCAD Software Solutions LLC Page 64 Subcatchment E1C: E1C Pervious-w-offsite-Undisturbed Hydrograph Runoff 0.65 0.61 cfs 0.6 NOAA 24-hr D 0.55 2-Year-2050 Rainfall=4.09" 0.5 P2=4.09" 0.45 Runoff Area=38,775 sf 0.4 Runoff Volume=4,923 cf Flow (cfs) 0.35 Runoff Depth=1.52" 0.3 0.25 Flow Length=668' 0.2 Tc=12.7 min 0.15 CN=72 0.1 0.05 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)