Drainage Report

Basin 5 witout exfiltration Proposed basin 5 R5 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 15 Summary for Pond 24P: Infiltration basin 5 Inflow Area = 2.275 ac, Inflow Depth = 2.46" for 2-Year event Inflow = 4.83 cfs @ 12.19 hrs, Volume= 0.466 af Outflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, Lag= 0.0 min Primary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.03 hrs Peak Elev= 572.14' @ 24.66 hrs Surf.Area= 12,410 sf Storage= 20,319 cf Plug-Flow detention time= (not calculated: initial storage exceeds outflow) Center-of-Mass det. time= (not calculated: no outflow) Volume Invert Avail.Storage Storage Description #1 570.50' 43,435 cf Custom Stage Data (Conic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 570.50 12,410 0 0 12,410 574.00 12,410 43,435 43,435 13,792 Device Routing Invert Outlet Devices #1 Primary 572.40' 18.0" W x 6.0" H Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=570.50' (Free Discharge) 1=Orifice/Grate ( Controls 0.00 cfs)