Drainage Report

Basin 2-1 Proposed Basin 2-1 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 7 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 33S: All basin's 2 undetained Runoff Area=34,308 sf Runoff Depth=1.20" Flow Length=36' Slope=0.1600 '/' Tc=10.0 min CN=74/0 Runoff=0.91 cfs 0.079 af Subcatchment 34S: Pre-dev basin 2 All Runoff Area=465,453 sf Runoff Depth=0.97" Flow Length=1,360' Tc=31.9 min CN=70/0 Runoff=5.69 cfs 0.865 af Subcatchment 40S: Basin 2-1 Runoff Area=26,074 sf Runoff Depth=1.36" Flow Length=190' Tc=10.0 min CN=76/98 Runoff=0.79 cfs 0.068 af Pond 41P: Pond 2-1 Peak Elev=547.05' Storage=2,121 cf Inflow=0.79 cfs 0.068 af Outflow=0.04 cfs 0.024 af Total Runoff Area = 12.072 ac Runoff Volume = 1.011 af Average Runoff Depth = 1.01"