Drainage Report

Basin 3 without exfiltration proposed basin 3 R5 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 33 Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 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 34S: Basin 3 Runoff Area=95,425 sf Runoff Depth=6.50" Flow Length=670' Tc=10.0 min CN=74/98 Runoff=13.09 cfs 1.188 af Subcatchment 36S: Basin 3 undetained Runoff Area=18,573 sf Runoff Depth=6.57" Flow Length=45' Slope=0.1000 '/' Tc=10.0 min CN=74/98 Runoff=2.56 cfs 0.234 af Subcatchment 37S: Basin 3 pre-development Runoff Area=113,998 sf Runoff Depth=5.04" Flow Length=304' Tc=19.4 min CN=70/0 Runoff=10.09 cfs 1.098 af Pond 35P: Basin 3 Peak Elev=531.69' Storage=23,858 cf Inflow=13.09 cfs 1.188 af Outflow=4.35 cfs 0.924 af Total Runoff Area = 5.234 ac Runoff Volume = 2.519 af Average Runoff Depth = 5.78"