Drainage Report

Basin 1 without exfiltration Proposed basin 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 34 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 28S: Basin 1 Runoff Area=314,926 sf Runoff Depth=7.30" Flow Length=1,759' Tc=30.2 min CN=74/98 Runoff=29.62 cfs 4.400 af Subcatchment 32S: Basin 1 Undetained Runoff Area=51,560 sf Runoff Depth=5.52" Flow Length=70' Slope=0.0800 '/' Tc=10.0 min CN=74/0 Runoff=6.40 cfs 0.544 af Subcatchment 36S: Basin 1 Predevelopment Runoff Area=368,926 sf Runoff Depth=5.04" Flow Length=1,360' Tc=31.9 min CN=70/0 Runoff=25.64 cfs 3.555 af Pond 29P: Basin 1 Peak Elev=544.77' Storage=136,068 cf Inflow=29.62 cfs 4.400 af Outflow=2.09 cfs 2.848 af Total Runoff Area = 16.883 ac Runoff Volume = 8.499 af Average Runoff Depth = 6.04"