Stormwater Management Report 03302026

24-223 DRAINAGE DESIGN-PROPOSED-2026-03-30 NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Prepared by Jarmel Kizel Architects & Engnrs Printed 3/30/2026 HydroCAD® 10.20-6a s/n 12607 © 2024 HydroCAD Software Solutions LLC Page 56 Subcatchment P3A-IMP: P3A IMPERVIOUS Hydrograph 0.5 Runoff 0.48 0.45 cfs 0.46 0.44 NOAA 24-hr D 0.42 0.4 100-Year-2020 Rainfall=9.18" 0.38 P2=3.47" 0.36 0.34 Runoff Area=4,040 sf 0.32 0.3 Runoff Volume=3,010 cf Flow (cfs) 0.28 0.26 Runoff Depth=8.94" 0.24 0.22 Flow Length=435' 0.2 Slope=0.0500 '/' 0.18 0.16 Tc=2.0 min 0.14 0.12 CN=98 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

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 Time (hours)