Drainage Report

Basin 5 witout exfiltration Proposed basin 5 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=0.03 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 23S: Basin 5 Runoff Area=99,084 sf Runoff Depth=7.34" Flow Length=314' Tc=11.3 min CN=74/98 Runoff=14.33 cfs 1.392 af Subcatchment 25S: overland 5-A Runoff Area=68,635 sf Runoff Depth=6.46" Flow Length=394' Tc=7.6 min CN=74/98 Runoff=10.39 cfs 0.848 af Subcatchment 26S: pre-dev basin 5 Runoff Area=167,719 sf Runoff Depth=5.04" Flow Length=274' Tc=11.5 min CN=70/0 Runoff=18.50 cfs 1.616 af Pond 24P: Infiltration basin 5 Peak Elev=573.29' Storage=34,562 cf Inflow=14.33 cfs 1.392 af Outflow=2.86 cfs 0.851 af Total Runoff Area = 7.701 ac Runoff Volume = 3.856 af Average Runoff Depth = 6.01"