Drainage Report

Basdin 2-2 without Exfiltration Proposed Basin 2-2 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 20 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 36S: Basin 2-2 Runoff Area=61,497 sf Runoff Depth=7.49" Flow Length=606' Tc=10.0 min CN=80/98 Runoff=9.35 cfs 0.881 af Subcatchment 45S: Basin 2-2 pre-development Runoff Area=62,290 sf Runoff Depth=5.04" Flow Length=130' Tc=13.3 min CN=70/0 Runoff=6.47 cfs 0.600 af Pond 42P: Pond 2-2 Peak Elev=544.88' Storage=20,478 cf Inflow=9.35 cfs 0.881 af Outflow=2.02 cfs 0.684 af Total Runoff Area = 2.842 ac Runoff Volume = 1.481 af Average Runoff Depth = 6.25"