Drainage Report

Basin 2-6 without exfiltration Proposed basin 2-6 R5 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 23 Summary for Pond 37P: Pond 2-6 Inflow Area = 1.842 ac, Inflow Depth = 4.98" for 10-Year event Inflow = 7.83 cfs @ 12.17 hrs, Volume= 0.765 af Outflow = 0.68 cfs @ 13.43 hrs, Volume= 0.439 af, Atten= 91%, Lag= 75.9 min Primary = 0.68 cfs @ 13.43 hrs, Volume= 0.439 af Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs Peak Elev= 542.57' @ 13.43 hrs Surf.Area= 10,782 sf Storage= 22,303 cf Plug-Flow detention time= 483.2 min calculated for 0.439 af (57% of inflow) Center-of-Mass det. time= 355.7 min ( 1,108.0 - 752.2 ) Volume Invert Avail.Storage Storage Description #1 540.50' 37,737 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 540.50 10,782 0 0 544.00 10,782 37,737 37,737 Device Routing Invert Outlet Devices #1 Primary 541.80' 6.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.68 cfs @ 13.43 hrs HW=542.57' (Free Discharge) 1=Orifice/Grate (Orifice Controls 0.68 cfs @ 3.47 fps)