complete drainage report rev 9

Existing Conditions NOAA 24-hr D 2-Year Rainfall=3.44" 2024-04-20 HydroCAD - Existing Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 8 Summary for Subcatchment 10S: DA 1 - Perv Runoff = 8.62 cfs @ 12.34 hrs, Volume= Routed to Link 11L : DA 1 45,754 cf, Depth= 1.14" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2-Year Rainfall=3.44" Area (sf) 197,386 284,447 481,833 481,833 CN 77 70 73 Description Woods, Good, HSG D Woods, Good, HSG C Weighted Average 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.9 100 0.0450 0.11 Sheet Flow, Sheet Flow (A-B) Woods: Light underbrush n= 0.400 P2= 3.47" 7.2 1,625 0.0540 3.74 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 22.1 1,725 Total Sheet Flow (A-B) SCF (B-C) Subcatchment 10S: DA 1 - Perv