NOAA 24-hr D 10 YR-C Rainfall=5.38"
Printed 12/19/2025
ons LLC Page 179
Analysis - Proposed Conditions NOAA
Prepared by Civil Core Consulting
HydroCAD® 10.20-8a s/n 13637 © 2025 HydroCAD Software Solutions LLC
Summary for Pond 6P: BIORENTION BASIN 2A
Inflow Area = 18,731 sf, 0.00% Impervious, Inflow Depth = 0.28" for 10 YR-C event
Inflow = 0.02 cfs @ 12.87 hrs, Volume= 442 cf
Outflow = 0.02 cfs @ 13.41 hrs, Volume= 396 cf, Atten= 15%, Lag= 32.2 min
Primary = 0.02 cfs @ 13.41 hrs, Volume= 396 cf
Routed to Pond 33P : INFILTRATION BASIN 2
Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs
Peak Elev= 94.91' @ 13.41 hrs Surf.Area= 137 sf Storage= 60 cf
Plug-Flow detention time= 91.4 min calculated for 396 cf (89% of inflow)
Center-of-Mass det. time= 47.6 min ( 1,065.9 - 1,018.3 )
| Volume | Invert | Avail.Storage | Storage Description | |
|---|---|---|---|---|
| #1 | 94.30' | 307 cf | Custom Stage Data (Prismatic) | Listed below (Recalc) |
| Elevation (feet) | Surf.Area (sq-ft) | Inc.Store (cubic-feet) | Cum.Store (cubic-feet) | |
| 94.30 | 63 | 0 | 0 | |
| 95.00 | 148 | 74 | 74 | |
| 96.00 | 319 | 234 | 307 | |
| Device | Routing | Invert | Outlet Devices | |
| #1 | Device 3 | 94.80' | 2.5" Vert. Orifice C= 0.600 Limited to weir flow at low heads | |
| #2 | Device 3 | 95.50' | 48.0" x 48.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads | |
| #3 | Primary | 91.80' | 12.0" Round Culvert L= 30.0' RCP, groove end projecting, Ke= 0.200 Inlet / Outlet Invert= 91.80' / 91.65' S= 0.0050 ' /' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 0.79 sf | |
| Primary OutFlow Max=0.02 cfs @ 13.41 hrs HW=94.91' TW=92.66' (Dynamic Tailwater) 3=Culvert (Passes 0.02 cfs of 6.67 cfs potential flow) 1=Orifice (Orifice Controls 0.02 cfs @ 1.11 fps) 2=Grate ( Controls 0.00 cfs) | ||||
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