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 20 Summary for Subcatchment 33S: All basin's 2 undetained Runoff = 4.26 cfs @ 12.17 hrs, Volume= 0.362 af, Depth= 5.52" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) CN Description 34,308 74 >75% Grass cover, Good, HSG C Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.0 36 0.1600 0.15 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 3.44" 4.0 36 Total, Increased to minimum Tc = 10.0 min Subcatchment 33S: All basin's 2 undetained Hydrograph Runoff 4.26 cfs 4 NOAA 24-hr D 100-Year Rainfall=8.66" Runoff Area=34,308 sf 3 Runoff Volume=0.362 af Flow (cfs) Runoff Depth=5.52" 2 Flow Length=36'

Runoff Depth=5.52" 2 Flow Length=36' Slope=0.1600 '/' Tc=10.0 min 1 CN=74/0 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)