NOAA 24-hr D 2 YR-C Rainfall=3.42" Printed 12/19/2025 s LLC Page 30
Analysis - Failure NOA Prepared by Civil Core Consulting HydroCAD® 10.20-8a s/n 13637 © 2025 HydroCAD Software Solutions LLC
Summary for Subcatchment 18S: Typ. Roof
Runoff = 0.15 cfs @ 12.09 hrs, Volume= Routed to Pond 5P : BIORETENTION BASIN 1A
491 cf, Depth= 3.19"
Runoff by SCS TR-20 method, UH=Delmarva, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= NOAA 24-hr D 2 YR-C Rainfall=3.42"
Area (sf) CN Description
1,850 98 Roofs, HSG A
1,850 98 100.00% Impervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec)
2.00 Direct Entry, Pipe Flow
Subcatchment 18S: Typ. Roof
Runoff