complete drainage report rev 9

POA-1 2024-05-12 HydroCad - Proposed POA 1B-1 NOAA 24-hr D 100-Year Rainfall=8.66" Prepared by Anderson Consulting Services HydroCAD® 10.20-5c s/n 06666 © 2023 HydroCAD Software Solutions LLC Printed 10/25/2024 Page 106 Summary for Subcatchment 26S: DA 1 Und - Perv Runoff = 9.65 cfs @ 12.14 hrs, Volume= Routed to Link 25L : POA 1 31,713 cf, Depth= 5.88" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NOAA 24-hr D 100-Year Rainfall=8.66" Area (sf) 31,523 33,164 64,687 64,687 CN 80 74 77 Description >75% Grass cover, Good, HSG D >75% Grass cover, Good, HSG C Weighted Average 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.9 100 0.1100 0.24 Sheet Flow, Sheet Flow (A-B) Grass: Dense n= 0.240 P2= 3.47" 0.2 50 0.1100 5.34 Shallow Concentrated Flow, SCF (B-C) Unpaved Kv= 16.1 fps 7.1 150 Total Sheet Flow (A-B) Subcatchment 26S: DA(B-C) 1 Und - Perv SCF