1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C Water Quality Storm Water Quality Rainfall=1.25", P2=3.47" Prepared by Casey & Keller, Inc Printed 2/4/2026 HydroCAD® 10.20-7a s/n 03272 © 2025 HydroCAD Software Solutions LLC Time span=0.00-72.00 hrs, dt=0.05 hrs, 1441 points Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv. UI as Pervious Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment 1: Exisiting Runoff Area=16,242 sf 67.90% Impervious Runoff Depth=0.73" Flow Length=141' Tc=5.9 min CN=74/98 Runoff=0.72 cfs 0.023 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=0.91" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.46 cfs 0.013 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=0.69" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.33 cfs 0.010 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=0.07" Flow Length=128' Tc=6.0 min CN=74/0 Runoff=0.00 cfs 0.000 af Pond 3: Pervious Pavers Peak Elev=413.90' Storage=256 cf Inflow=0.46 cfs 0.013 af Discarded=0.11 cfs 0.013 af Primary=0.00 cfs 0.000 af Outflow=0.11 cfs 0.013 af Pond 5: Pipes Peak Elev=411.28' Storage=140 cf Inflow=0.33 cfs 0.010 af Discarded=0.03 cfs 0.005 af Primary=0.24 cfs 0.005 af Outflow=0.27 cfs 0.010 af Link 7: Proposed Inflow=0.24 cfs 0.005 af Primary=0.24 cfs 0.005 af Total Runoff Area = 0.746 ac Runoff Volume = 0.046 af Average Runoff Depth = 0.74" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 119