Revised Stormwater Management Report

POA 2 proposed 2024-05-12 HydroCad - Proposed POA 2 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 6/29/2024 Page 132 HydroCAD® 10.20-5a s/n 06666 © 2023 HydroCAD Software Solutions LLC Summary for Pond 33P: Basin 11 Inflow Area = 84,693 sf, 77.02% Impervious, Inflow Depth = 4.44" for 10-Year event Inflow = 7.66 cfs @ 12.17 hrs, Volume= 31,349 cf Outflow = 5.55 cfs @ 12.26 hrs, Volume= 31,349 cf, Atten= 28%, Lag= 5.4 min Discarded = 3.13 cfs @ 12.00 hrs, Volume= 29,272 cf Primary = 2.42 cfs @ 12.26 hrs, Volume= 2,077 cf Routed to Link 28L : POA 2 Routing by Stor-Ind method, Time Span= 0.00-80.00 hrs, dt= 0.04 hrs Peak Elev= 590.38' @ 12.26 hrs Surf.Area= 13,504 sf Storage= 2,065 cf Plug-Flow detention time= 1.9 min calculated for 31,334 cf (100% of inflow) Center-of-Mass det. time= 1.9 min ( 766.8 - 764.9 ) Volume #1 Invert 590.00' Elevation (feet) 590.00 591.00 592.00 592.42 Device #1 #2 Avail.Storage 13,072 cf Surf.Area (sq-ft) 13,504 13,504 13,504 13,504 Routing Primary Discarded Invert 590.10' 590.00' Storage Description Custom Stage Data (Prismatic) Listed below (Recalc) 32,680 cf Overall x 40.0% Voids Inc.Store (cubic-feet) 0 13,504 13,504 5,672 Cum.Store (cubic-feet) 0 13,504 27,008 32,680 Outlet Devices 5.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) 10.000 in/hr Exfiltration over Surface area Discarded OutFlow Max=3.13 cfs @ 12.00 hrs HW=590.03' (Free Discharge) 2=Exfiltration (Exfiltration Controls 3.13 cfs) Primary OutFlow Max=2.36 cfs @ 12.26 hrs HW=590.38' (Free Discharge) 1=Sharp-Crested Rectangular Weir (Weir Controls 2.36 cfs @ 1.72 fps)