NOAA 24-hr D 100 YR-F Rainfall=11.41" Printed 12/19/2025 tions LLC Page 422
Analysis - Proposed Conditions NOAA 2 Prepared by Civil Core Consulting HydroCAD® 10.20-8a s/n 13637 © 2025 HydroCAD Software Solutions LLC
Summary for Pond 42P: BIORENTION BASIN 3A
Inflow Area = 29,621 sf, 0.00% Impervious, Inflow Depth = 2.87" for 100 YR-F event
Inflow = 1.18 cfs @ 12.22 hrs, Volume= 7,077 cf
Outflow = 1.17 cfs @ 12.25 hrs, Volume= 6,978 cf, Atten= 1%, Lag= 1.3 min
Primary = 1.17 cfs @ 12.25 hrs, Volume= 6,978 cf
Routed to Pond 8P : INFIL TRATION BASIN 3
Routed to Pond 8P : INFILTRATION BASIN 3
Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 94.57' @ 12.25 hrs Surf.Area= 934 sf Storage= 560 cf Plug-Flow detention time= 36.9 min calculated for 6,978 cf (99% of inflow) Center-of-Mass det. time= 29.2 min ( 933.3 - 904.2 )
VolumeInvertAvail.StorageStorage Description
#193.30'1,041 cfCustom Stage Data (Prismatic)Listed below (Recalc)
Elevation (feet)Surf.Area (sq-ft)Inc.Store (cubic-feet)Cum.Store (cubic-feet)
93.307700
94.00417173173
95.001,3198681,041
DeviceRoutingInvertOutlet Devices
#1Device 393.80'2.5" Vert. Orifice C= 0.600 Limited to weir flow at low heads
#2Device 394.50'48.0" x 48.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads
#3Primary90.80'12.0" Round Culvert L= 11.0' RCP, groove end projecting, Ke= 0.200 Inlet / Outlet Invert= 90.80' / 90.75' S= 0.0045 ' /' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 0.79 sf
Primary OutFlow Max=1.17 cfs @ 12.25 hrs HW=94.57' TW=92.26' (Dynamic Tailwater) 3=Culvert (Passes 1.17 cfs of 7.18 cfs potential flow) 1=Orifice (Orifice Controls 0.13 cfs @ 3.94 fps) 2=Grate (Weir Controls 1.03 cfs @ 0.88 fps)