Stormwater Report

512-516 Pleasant Valley Way, West Orange 1240815-pipes NOAA 24-hr D 10-Year-2020 Rainfall=5.38", 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 26 Summary for Subcatchment 6: Bypass Runoff = 0.04 cfs@ 12.13 hrs, Volume= 0.003 af, Depth= 2.67" Routed to Link 7 : Proposed Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= 0.05 NOAA 24-hr D 10-Year-2020 Rainfall=5.38", P2=3.47" Area (sf) CN Description 605__ 74 ~~>75% Grass cover, Good, HSG C 605 74 100.00% Pervious Area Te Length Slope Velocity Capacity Description (min) (feet) (ft/ft)__ (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 NOAA 24-hr D 10-Year-2020 Rainfall=5.38" P2=3.47" Runoff Area=605 sf Runoff Volume=0.003 af Runoff Depth=2.67" Flow Length=128' Tc=6.0 min CN=74/0 Flow (cfs) ° 8 . Time (hours) 33