102 Sams -REV 12-02-25 NJ DEP 2-hr NJDEP Rainfall=1.25" Prepared by Haler Consulting Printed 04/12/2025 HydroCAD® 10.20-2h s/n 10351 © 2024 HydroCAD Software Solutions LLC Page 6
Summary for Subcatchment 175S: DA P2 (Impervious)
Runoff = 1.38 cfs @ 1.11 hrs, Volume= 2,023 cf, Depth= 1.03" Routed to Pond 177P : WQ Infiltration Basin #2
Runoff by SCS TR-20 method, UH=Delmarva, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= NJ DEP 2-hr NJDEP Rainfall=1.25"
Area (sf) CN Description
23,470 98 Paved parking, HSG A
0 98 Unconnected pavement, HSG A
0 98 Unconnected pavement, HSG A
0 98 Paved parking, HSG A
0 98 Unconnected pavement, HSG A
23,470 98 Weighted Average
23,470 98 100.00% Impervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec)
4.1 350 0.0050 1.44
4.9 450 Total
0.8 100 0.0500 2.05
Subcatchment 175S: DA P2 (Impervious)