Drainage Report

Basin 2-4 without exfiltration Proposed Basin 2-4 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 38S: Basin 2-4 Runoff Area=96,037 sf Runoff Depth=1.93" Flow Length=1,912' Tc=10.1 min CN=78/98 Runoff=3.93 cfs 0.354 af Subcatchment 45S: Basin 2-4 pe-development Runoff Area=96,036 sf Runoff Depth=0.97" Flow Length=390' Tc=18.0 min CN=70/0 Runoff=1.56 cfs 0.178 af Pond 43P: pond 2-4 Peak Elev=543.10' Storage=12,214 cf Inflow=3.93 cfs 0.354 af Outflow=0.11 cfs 0.121 af Total Runoff Area = 4.409 ac Runoff Volume = 0.532 af Average Runoff Depth = 1.45"