Drainage Report

Basin 3 without exfiltration proposed basin 3 R5 NOAA 24-hr D 2-Year Rainfall=3.44" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 8 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=1.88" Flow Length=670' Tc=10.0 min CN=74/98 Runoff=3.73 cfs 0.343 af Subcatchment 36S: Basin 3 undetained Runoff Area=18,573 sf Runoff Depth=1.93" Flow Length=45' Slope=0.1000 '/' Tc=10.0 min CN=74/98 Runoff=0.74 cfs 0.068 af Subcatchment 37S: Basin 3 pre-development Runoff Area=113,998 sf Runoff Depth=0.97" Flow Length=304' Tc=19.4 min CN=70/0 Runoff=1.79 cfs 0.212 af Pond 35P: Basin 3 Peak Elev=530.38' Storage=12,717 cf Inflow=3.73 cfs 0.343 af Outflow=0.09 cfs 0.080 af Total Runoff Area = 5.234 ac Runoff Volume = 0.624 af Average Runoff Depth = 1.43"