Stormwater Management Report 03302026

24-223 DRAINAGE DESIGN-PROPOSED-2026-03-30 NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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 16 Subcatchment P3B-IMP: P3B IMPERVIOUS Hydrograph 0.046 Runoff 0.044 0.04 cfs 0.042 0.04 NOAA 24-hr D 0.038 0.036 2-Year-2020 Rainfall=3.47" 0.034 0.032 P2=3.47" 0.03 0.028 Runoff Area=980 sf Runoff Volume=264 cf Flow (cfs) 0.026 0.024 0.022 Runoff Depth=3.24" 0.02 0.018 Flow Length=188' 0.016 0.014 Tc=1.1 min 0.012 0.01 CN=98 0.008 0.006 0.004 0.002 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

0.002 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)