Analysis - Failure NOAA 24-hr D 2 YR-C Rainfall=3.42" Prepared by Civil Core Consulting Printed 12/19/2025 HydroCAD® 10.20-8a s/n 13637 © 2025 HydroCAD Software Solutions LLC Page 8
Time span=0.00-72.00 hrs, dt=0.01 hrs, 7201 points x 3 Runoff by SCS TR-20 method, UH=Delmarva, Split Pervious/Imperv. UI as Pervious Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method
Runoff by SCS TR-20 method, UH=Delmarva, Split Pervious/Imperv. UI as Pervious Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method
Subcatchment2S: DA-P1 PERVOUSRunoff Area=1.220 ac 0.00% Impervious Runoff Depth=0.01" Flow Length=525' Tc=14.2 min CN=39/0 Runoff=0.00 cfs 24 cf
Subcatchment3S: DA-P3 PERVOUSRunoff Area=0.680 ac 0.00% Impervious Runoff Depth=0.01" Flow Length=363' Tc=11.5 min CN=39/0 Runoff=0.00 cfs 13 cf
Subcatchment4S: DA-P2 PERVOUSRunoff Area=0.430 ac 0.00% Impervious Runoff Depth=0.01" Flow Length=168' Slope=0.0300'/' Tc=8.7 min CN=39/0 Runoff=0.00 cfs 8 cf
Subcatchment5S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment6S: DA-P3 IMPERVOUSRunoff Area=0.200 ac 100.00% Impervious Runoff Depth=3.19" Flow Length=155' Tc=4.3 min CN=0/98 Runoff=0.59 cfs 2,314 cf
Subcatchment7S: DA-P2 IMPERVOUSRunoff Area=0.190 ac 100.00% Impervious Runoff Depth=3.19" Flow Length=172' Tc=4.3 min CN=0/98 Runoff=0.56 cfs 2,198 cf
Subcatchment8S: DA-P1 IMPERVOUS Flow Length=372'Runoff Area=0.400 ac 100.00% Impervious Runoff Depth=3.19" Slope=0.0200'/' Tc=2.5 min CN=0/98 Runoff=1.33 cfs 4,627 cf
Subcatchment14S: LOT 11 RoofRunoff Area=3,000 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=40' Tc=0.3 min CN=0/98 Runoff=0.25 cfs 797 cf
Subcatchment16S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment17S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment18S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment35S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment36S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment37S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment38S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf
Subcatchment39S: Typ. RoofRunoff Area=1,850 sf 100.00% Impervious Runoff Depth=3.19" Flow Length=45' Tc=0.4 min CN=0/98 Runoff=0.15 cfs 491 cf