NOAA 24-hr D 10 YR-C Rainfall=5.38" Printed 12/19/2025 ons LLC Page 209
Analysis - Proposed Conditions NOAA 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 = 0.28" for 10 YR-C event Inflow = 0.04 cfs @ 12.98 hrs, Volume = 700 cf Outflow = 0.02 cfs @ 14.27 hrs, Volume = 600 cf, Atten = 32%, Lag = 77.0 min Primary = 0.02 cfs @ 14.27 hrs, Volume = 600 cf 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= 93.92' @ 14.27 hrs Surf.Area= 378 sf Storage= 141 cf Plug-Flow detention time= 139.0 min calculated for 600 cf (86% of inflow) Center-of-Mass det. time= 80.7 min (1,103.3 - 1,022.6)
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=0.02 cfs @ 14.27 hrs HW=93.92' TW=90.75' (Dynamic Tailwater) 3=Culvert (Passes 0.02 cfs of 7.59 cfs potential flow) 1=Orifice (Orifice Controls 0.02 cfs @ 1.18 fps) 2=Grate ( Controls 0.00 cfs)