Drainage Report

Basin 1 without exfiltration Proposed basin 1 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 28S: Basin 1 Runoff Area=314,926 sf Runoff Depth=2.43" Flow Length=1,759' Tc=30.2 min CN=74/98 Runoff=9.88 cfs 1.466 af Subcatchment 32S: Basin 1 Undetained Runoff Area=51,560 sf Runoff Depth=1.20" Flow Length=70' Slope=0.0800 '/' Tc=10.0 min CN=74/0 Runoff=1.36 cfs 0.118 af Subcatchment 36S: Basin 1 Predevelopment Runoff Area=368,926 sf Runoff Depth=0.97" Flow Length=1,360' Tc=31.9 min CN=70/0 Runoff=4.51 cfs 0.685 af Pond 29P: Basin 1 Peak Elev=542.84' Storage=63,856 cf Inflow=9.88 cfs 1.466 af Outflow=0.00 cfs 0.000 af Total Runoff Area = 16.883 ac Runoff Volume = 2.270 af Average Runoff Depth = 1.61"