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 12 Subcatchment E2-IMP: E2A IMPERVIOUS Hydrograph 0.55 Runoff 0.51 cfs 0.5 NOAA 24-hr D 0.45 2-Year-2020 Rainfall=3.47" 0.4 P2=3.47" Runoff Area=12,035 sf 0.35 Runoff Volume=3,246 cf Flow (cfs) 0.3 Runoff Depth=3.24" 0.25 Flow Length=435' 0.2 Slope=0.0550 '/' 0.15 Tc=2.0 min 0.1 CN=98 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)