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 F 144507 Page 11 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 0 1,223 0 2,547 0 sf sf sf sf sf 0.000 0.028 0.000 0.058 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)= 3,770 3,770 sf sf 0.09 0.09 ac ac Composite CN = 75 of 19 SJM MJB Final X References Time of Concentration: Sheet Flow 66 L= ft 22.64% % S= n= 0.400 Tc = 5.17 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Woods: Light underbrush min 0.02 0.38 0.13 0.29 0.62 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.001 ac-ft V(25) = 0.026 ac-ft Current: Future: V(2) = 0.009 ac-ft V(2) = V(10) = 0.020 ac-ft V(10) = V(100) = 0.044 ac-ft V(100) = 0.18 0.38 0.84 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.013 0.026 0.060 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