Stormwater Report

512-516 Pleasant Valley Way, West Orange 1240815-pipes Water Quality Storm Water Quality Rainfall=1.25", 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 52 Summary for Subcatchment 6: Bypass Runoff = 0.00 cfs@ 1.25 hrs, Volume= 0.000 af, Depth= 0.07" 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 Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" Area (sf) CN Description 60574 ~—~>75% Grass cover, Good, HSG C 605 74 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) _(fUft)__(f/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 0.0024 Water Quality Storm 0.0024 Water Quality Rainfall=1.25" P2=3.47" Runoff Area=605 sf Runoff Volume=0.000 af Runoff Depth=0.07" Flow Length=128' Tc=6.0 min CN=74/0 Flow (cfs) 0 2 4 6 B 10 12 14 16 16 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 7072 Time (hours) 59