Stormwater Report

512-516 Pleasant Valley Way, West Orange 1240815-pipes NOAA 24-hr D 100-Year-2020 Rainfall=9. 18", P2=3.47" Prepared by Casey & Keller, Inc Printed 8/25/2025 HydroCAD® 10.20-7a_s/n 03272 © 2025 HydroCAD Software Solutions LLC Page 39 Summary for Subcatchment 6: Bypass Runoff = 0.09 cfs @ 12.13 hrs, Volume= 0.007 af, Depth= 5.99" Routed to Link 7 : Proposed Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. Ul as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 NOAA 24-hr D 100-Year-2020 Rainfall=9.18", P2=3.47" Area (sf) CN Description 605 74 _>75% Grass cover, Good, HSG C 605 74 100.00% Pervious Area Tc Length Slope Velocity Capacity Description ) (min) (feet) (fft) (ft/sec) (cfs' 5.9 100 0.0650 0.28 Sheet Flow, 1 Grass: Short n= 0.150 P2= 3.47" 0.1 28 0.0900 4.50 Shallow Concentrated Flow, 2 Grassed Waterway Kv= 15.0 fps 6.0 128 Total Subcatchment 6: Bypass Hydrograph aoe NOAA 24-hr D 0.0854 100-Year-2020 Rainfall=9.18" owe P2=3.47" 0.074 Runoff Area=605 sf Sapeee Runoff Volume=0.007 af $0.0554 Runoff Depth=5.99" ae Flow Length=128' 0.044 Tc=6.0 min CN=74/0 Time (hours) 46