Drainage Report

Basin 3 without exfiltration proposed basin 3 R5 NOAA 24-hr D 10-Year Rainfall=5.22" Prepared by Anderson Consulting Services Printed 10/29/2023 HydroCAD® 10.20-3f s/n 06666 © 2023 HydroCAD Software Solutions LLC Page 20 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=3.37" Flow Length=670' Tc=10.0 min CN=74/98 Runoff=6.79 cfs 0.615 af Subcatchment 36S: Basin 3 undetained Runoff Area=18,573 sf Runoff Depth=3.43" Flow Length=45' Slope=0.1000 '/' Tc=10.0 min CN=74/98 Runoff=1.34 cfs 0.122 af Subcatchment 37S: Basin 3 pre-development Runoff Area=113,998 sf Runoff Depth=2.20" Flow Length=304' Tc=19.4 min CN=70/0 Runoff=4.35 cfs 0.480 af Pond 35P: Basin 3 Peak Elev=530.77' Storage=15,712 cf Inflow=6.79 cfs 0.615 af Outflow=0.87 cfs 0.352 af Total Runoff Area = 5.234 ac Runoff Volume = 1.217 af Average Runoff Depth = 2.79"