J_2024 05 09_West Orange Stormwater Management Plan

Client Project # Project Name PSE&G Date 03/29/23 West Orange Switching Station PO-DA H 144507 Page 13 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 0 440 0 9,855 0 sf sf sf sf sf 0.000 0.010 0.000 0.226 0.000 ac ac ac ac ac D D D D D CN = CN = CN = CN = CN = 98 80 85 73 0 Total Area (TA)= TA (less non contributory)= 10,295 sf 10,295 sf 0.24 0.24 ac ac Composite CN = 73 of 19 SJM MJB Final X References Time of Concentration: Sheet Flow 82 L= ft 17.36% % S= n= 0.400 Tc = 6.84 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Woods: Light underbrush min 0.03 0.92 0.30 0.69 1.54 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.001 ac-ft V(25) = 0.068 ac-ft Current: Future: V(2) = 0.023 ac-ft V(2) = V(10) = 0.051 ac-ft V(10) = V(100) = 0.117 ac-ft V(100) = 0.43 0.92 2.13 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.031 0.067 0.160 ac-ft ac-ft ac-ft HydroCAD HydroCAD HydroCAD https://burnsmcd.sharepoint.com/sites/PSEGSub/Shared Documents/WestOrange26kVLifecyclePrelim_144507/Dsgn/Sub/Civil/Storm_Wtr/6. 5/10/2024 4:13 PM Storm Water Management Report/Appendix A - Design Notes/Archived/West Orange Design Notes_Blake.xlsx