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 11 Summary for Subcatchment 14S: DA 3 - Perv Runoff = 0.13 cfs @ 12.26 hrs, Volume= Routed to Link 13L : DA 3 627 cf, Depth= 0.97" 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) 7,751 7,751 CN 70 Description Woods, Good, HSG C 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.6 100 0.0400 0.11 Sheet Flow, Sheet Flow (A-B) Woods: Light underbrush n= 0.400 P2= 3.47" 0.2 70 0.1150 5.46 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 15.8 170 Total Sheet Flow (A-B) SCF (B-C) Subcatchment 14S: DA 3 - Perv Subcatchment 14S: DA 3 - Perv Hydrograph Runoff 0.14 0.13 cfs NOAA 24-hr D 2-Year Rainfall=3.44" Runoff Area=7,751 sf Runoff Volume=627 cf Runoff Depth=0.97" Flow Length=170' Tc=15.8 min CN=70 0.13 0.12 0.11 0.1 Flow (cfs) 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 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)