complete drainage report rev 9

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 83 Summary for Pond 24P: Basin 6 Inflow Area = 108,077 sf, 52.61% Impervious, Inflow Depth = 3.83" for 10-Year event Inflow = 10.83 cfs @ 12.11 hrs, Volume= 34,455 cf Outflow = 8.40 cfs @ 12.14 hrs, Volume= 34,455 cf, Atten= 22%, Lag= 2.1 min Discarded = 8.27 cfs @ 12.06 hrs, Volume= 34,425 cf Primary = 0.13 cfs @ 12.14 hrs, Volume= 30 cf Routed to Pond 16P : Basin 1 Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs Peak Elev= 600.05' @ 12.14 hrs Surf.Area= 35,719 sf Storage= 784 cf Plug-Flow detention time= 0.5 min calculated for 34,450 cf (100% of inflow) Center-of-Mass det. time= 0.5 min ( 777.4 - 776.9 ) Volume #1 Invert 600.00' Elevation (feet) 600.00 601.00 601.42 Device #1 #2 Avail.Storage 20,288 cf Surf.Area (sq-ft) 35,719 35,719 35,719 Routing Primary Discarded Invert 600.02' 600.00' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) 50,721 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 35,719 15,002 Cum.Store (cubic-feet) 0 35,719 50,721 Outlet Devices 6.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 10.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=8.27 cfs @ 12.06 hrs HW=600.02' (Free Discharge) 2=Exfiltration (Exfiltration Controls 8.27 cfs) Primary OutFlow Max=0.13 cfs @ 12.14 hrs HW=600.05' (Free Discharge) 1=Sharp-Crested Rectangular Weir (Weir Controls 0.13 cfs @ 0.61 fps) Pond 24P: Basin 6 Sharp-Crested Rectangular Exfiltration Weir