1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2020 Rainfall=3.47", 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=2.59" Flow Length=141' Tc=5.9 min CN=74/98 Runoff=0.97 cfs 0.080 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=2.97" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.59 cfs 0.044 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=2.52" Flow Length=92' Tc=1.0 min CN=74/98 Runoff=0.48 cfs 0.035 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=1.22" Flow Length=128' Tc=6.0 min CN=74/0 Runoff=0.04 cfs 0.003 af Pond 3: Pervious Pavers Peak Elev=414.07' Storage=369 cf Inflow=0.59 cfs 0.044 af Discarded=0.11 cfs 0.044 af Primary=0.00 cfs 0.000 af Outflow=0.11 cfs 0.044 af Pond 5: Pipes Peak Elev=411.37' Storage=163 cf Inflow=0.48 cfs 0.035 af Discarded=0.03 cfs 0.023 af Primary=0.41 cfs 0.012 af Outflow=0.43 cfs 0.035 af Link 7: Proposed Inflow=0.44 cfs 0.015 af Primary=0.44 cfs 0.015 af Total Runoff Area = 0.746 ac Runoff Volume = 0.162 af Average Runoff Depth = 2.61" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 15