Analysis - Proposed Conditions 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
Time span=0.00-7.2.00 hrs, dt=0.01 hrs, 7.201 points
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
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 IMPERVOUSRunoff Area=0.400 ac 100.00% Impervious Runoff Depth=3.19" Flow Length=372' 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
Pond 2P: Subsurface Infiltration Basin 1Peak Elev=87.01' Storage=6 cf Inflow=0.34 cfs 3,941 cf Discarded=0.34 cfs 3,941 cf Primary=0.00 cfs 0 cf Outflow=0.34 cfs 3,941 cf
Pond 5P: BIORETENTION BASIN 1APeak Elev=91.88' Storage=2,824 cf Inflow=1.33 cfs 4,651 cf Outflow=0.14 cfs 3,145 cf
Pond 6P: BIORETENTION BASIN 2APeak Elev=94.42' Storage=8 cf Inflow=0.00 cfs 8 cf Outflow=0.00 cfs 0 cf
Pond 8P: INFILTRATION BASIN 3Peak Elev=90.76' Storage=6 cf Inflow=0.15 cfs 2,310 cf Discarded=0.15 cfs 2,310 cf Primary=0.00 cfs 0 cf Outflow=0.15 cfs 2,310 cf
Pond 10P: PERVOUS PAVEMENT 2BPeak Elev=94.59' Storage=748 cf Inflow=0.56 cfs 2,198 cf Outflow=0.14 cfs 2,194 cf
Pond 15P: PERVOUS PAVEMENT 3BPeak Elev=94.71' Storage=773 cf Inflow=0.59 cfs 2,314 cf Outflow=0.15 cfs 2,310 cf
Pond 33P: INFILTRATION BASIN 2Peak Elev=92.12' Storage=286 cf Inflow=0.14 cfs 2,194 cf Discarded=0.08 cfs 2,194 cf Primary=0.00 cfs 0 cf Outflow=0.08 cfs 2,194 cf
Pond 42P: BIORETENTION BASIN 3APeak Elev=93.42' Storage=13 cf Inflow=0.00 cfs 13 cf Outflow=0.00 cfs 0 cf
Link 32L: POA1Inflow=0.00 cfs 0 cf Primary=0.00 cfs 0 cf