Drainage Report

Basin 2-5 without exfiltration Proposed Basin 2-5 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 28 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 38S: Basin 2-5 Runoff Area=71,875 sf Runoff Depth=8.42" Flow Length=1,020' Tc=10.0 min CN=98/98 Runoff=11.68 cfs 1.158 af Subcatchment 42S: Basin 2-5 predevelopment Runoff Area=71,875 sf Runoff Depth=5.04" Flow Length=220' Tc=13.2 min CN=70/0 Runoff=7.48 cfs 0.693 af Pond 39P: pond 2-5 Peak Elev=543.27' Storage=31,977 cf Inflow=11.68 cfs 1.158 af Outflow=1.16 cfs 0.888 af Total Runoff Area = 3.300 ac Runoff Volume = 1.850 af Average Runoff Depth = 6.73"