Drainage Report

Basin 2-4 without exfiltration Proposed Basin 2-4 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 19 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 2-4 Runoff Area=96,037 sf Runoff Depth=3.46" Flow Length=1,912' Tc=10.1 min CN=78/98 Runoff=7.12 cfs 0.636 af Subcatchment 45S: Basin 2-4 pe-development Runoff Area=96,036 sf Runoff Depth=2.20" Flow Length=390' Tc=18.0 min CN=70/0 Runoff=3.80 cfs 0.404 af Pond 43P: pond 2-4 Peak Elev=543.52' Storage=16,883 cf Inflow=7.12 cfs 0.636 af Outflow=0.62 cfs 0.403 af Total Runoff Area = 4.409 ac Runoff Volume = 1.040 af Average Runoff Depth = 2.83"