1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 25-Year-2050 Rainfall=8.08", 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=6.93" Flow Length=141' Tc=5.5 min CN=74/98 Runoff=2.59 cfs 0.215 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=7.47" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=1.45 cfs 0.109 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=6.83" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=1.30 cfs 0.095 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=5.00" Flow Length=128' Tc=5.5 min CN=74/0 Runoff=0.17 cfs 0.013 af Pond 3: Pervious Pavers Peak Elev=415.10' Storage=1,034 cf Inflow=1.45 cfs 0.109 af Discarded=0.11 cfs 0.088 af Primary=0.59 cfs 0.021 af Outflow=0.70 cfs 0.109 af Pond 5: Pipes Peak Elev=411.96' Storage=336 cf Inflow=1.68 cfs 0.116 af Discarded=0.03 cfs 0.041 af Primary=1.34 cfs 0.075 af Outflow=1.36 cfs 0.116 af Link 7: Proposed Inflow=1.51 cfs 0.088 af Primary=1.51 cfs 0.088 af Total Runoff Area = 0.746 ac Runoff Volume = 0.432 af Average Runoff Depth = 6.96" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 93