Drainage Report

basin 4 with exfiltration Proposed basin 4 R4 with exfiltration NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/23/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 7 Time span=0.00-72.00 hrs, dt=0.03 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 16S: Basin 4 Porous pvmt Runoff Area=85,708 sf Runoff Depth=2.64" Flow Length=509' Tc=8.1 min CN=74/98 Runoff=4.96 cfs 0.432 af Pond 17P: Porous pavement system 4 Peak Elev=588.20' Storage=13,655 cf Inflow=4.96 cfs 0.432 af Discarded=0.07 cfs 0.409 af Primary=0.00 cfs 0.000 af Outflow=0.07 cfs 0.409 af Total Runoff Area = 1.968 ac Runoff Volume = 0.432 af Average Runoff Depth = 2.64"