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 B 144507 Page 7 Made By Checked By Preliminary Land Use Impervious, Pavement >75% Grass cover, Good Yard Stone/Gravel Pad Brush, Good Non-Contributory 0 1,874 599 26,074 0 sf sf sf sf sf 0.000 0.043 0.014 0.599 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)= 28,547 sf 28,547 sf 0.66 0.66 ac ac Composite CN = 74 of 19 SJM MJB Final X References Time of Concentration: Sheet Flow L= 100 ft 9.00% % S= n= 0.400 Woods: Light underbrush Shallow Concentrated Flow L= S= 64 ft 19.20% % Short Grass Pasture North Channel L= 134 ft S= 0.94% % Tc = 12.41 Flows: WQ = Q(25) = Current: Q(2) = Q(10) = Q(100) = Earth, long dense weeds min 0.08 2.09 0.68 1.56 3.52 cfs cfs cfs cfs HydroCAD Future: Q(2) = Q(10) = Q(100) = Runoff Volume (Weighted Average Volume): WQ = 0.004 ac-ft V(25) = 0.192 ac-ft Current: Future: V(2) = 0.065 ac-ft V(2) = V(10) = 0.144 ac-ft V(10) = V(100) = 0.327 ac-ft V(100) = 0.98 2.11 4.89 cfs cfs cfs HydroCAD HydroCAD HydroCAD HydroCAD HydroCAD 0.089 0.189 0.446 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