1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 10-Year-2050 Rainfall=6.37", P2=4.09" 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=5.29" Flow Length=141' Tc=5.5 min CN=74/98 Runoff=1.98 cfs 0.164 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=5.79" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=1.13 cfs 0.085 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=5.20" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=0.99 cfs 0.072 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=3.50" Flow Length=128' Tc=5.5 min CN=74/0 Runoff=0.12 cfs 0.009 af Pond 3: Pervious Pavers Peak Elev=414.80' Storage=843 cf Inflow=1.13 cfs 0.085 af Discarded=0.11 cfs 0.076 af Primary=0.23 cfs 0.009 af Outflow=0.34 cfs 0.085 af Pond 5: Pipes Peak Elev=411.60' Storage=229 cf Inflow=1.00 cfs 0.081 af Discarded=0.03 cfs 0.035 af Primary=0.88 cfs 0.046 af Outflow=0.91 cfs 0.081 af Link 7: Proposed Inflow=1.00 cfs 0.055 af Primary=1.00 cfs 0.055 af Total Runoff Area = 0.746 ac Runoff Volume = 0.330 af Average Runoff Depth = 5.31" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 80