Drainage Report

Basin 2-1 Proposed Basin 2-1 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 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 33S: All basin's 2 undetained Runoff Area=34,308 sf Runoff Depth=5.52" Flow Length=36' Slope=0.1600 '/' Tc=10.0 min CN=74/0 Runoff=4.26 cfs 0.362 af Subcatchment 34S: Pre-dev basin 2 All Runoff Area=465,453 sf Runoff Depth=5.04" Flow Length=1,360' Tc=31.9 min CN=70/0 Runoff=32.35 cfs 4.485 af Subcatchment 40S: Basin 2-1 Runoff Area=26,074 sf Runoff Depth=5.81" Flow Length=190' Tc=10.0 min CN=76/98 Runoff=3.38 cfs 0.290 af Pond 41P: Pond 2-1 Peak Elev=547.85' Storage=3,730 cf Inflow=3.38 cfs 0.290 af Outflow=2.50 cfs 0.246 af Total Runoff Area = 12.072 ac Runoff Volume = 5.137 af Average Runoff Depth = 5.11"