Drainage Report

Basin 2-3 without exfiltration Proposed Basin 2-3 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 40S: Basin 2-3 Runoff Area=98,395 sf Runoff Depth=2.30" Flow Length=1,558' Tc=10.5 min CN=79/98 Runoff=4.65 cfs 0.434 af Subcatchment 45S: basin 2-3 pre-development Runoff Area=99,393 sf Runoff Depth=0.97" Flow Length=280' Tc=12.2 min CN=70/0 Runoff=1.92 cfs 0.185 af Pond 44P: pond 2-3 Peak Elev=543.43' Storage=14,908 cf Inflow=4.65 cfs 0.434 af Outflow=0.15 cfs 0.144 af Total Runoff Area = 4.541 ac Runoff Volume = 0.618 af Average Runoff Depth = 1.63"