Analysis - County NOAA 24-hr D 2 YR-C Rainfall=3.42" Prepared by Civil Core Consulting Printed 10/24/2025 HydroCAD® 10.20-7a s/n 13637 © 2025 HydroCAD Software Solutions LLC Page 8
Summary for Subcatchment 35S: COUNTY SYSTEM
Runoff = 0.44 cfs @ 12.11 hrs, Volume= Routed to Pond CB-1 : County Basin-1 1,505 cf, Depth= 2.18"
1,505 cf, Depth= 2.18"
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 (ac) CN Description
0.130 98 Paved parking, HSG A
0.060 39 >75% Grass cover, Good, HSG A
0.190 79 Weighted Average
0.060 39 31.58% Pervious Area
0.130 98 68.42% Impervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec)
2.3 276 0.0100 2.03
Paved Kv= 20.3 fps
Subcatchment 35S: COUNTY SYSTEM
Subcatchment 35S: COUNTY SYSTEM
Runoff