1240815StormWaterManagementReportrcd 3 12 2026

512-516 Pleasant Valley Way, West Orange 1240815-pipes3-C NOAA 24-hr D 2-Year-2050 Rainfall=4.09", 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=3.15" Flow Length=141' Tc=5.5 min CN=74/98 Runoff=1.19 cfs 0.098 af Subcatchment 2: Parking Lot Runoff Area=7,658 sf 86.88% Impervious Runoff Depth=3.57" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=0.70 cfs 0.052 af Subcatchment 4: Proposed Runoff Area=7,266 sf 64.56% Impervious Runoff Depth=3.08" Flow Length=92' Tc=0.9 min CN=74/98 Runoff=0.59 cfs 0.043 af Subcatchment 6: Bypass Runoff Area=1,318 sf 0.00% Impervious Runoff Depth=1.66" Flow Length=128' Tc=5.5 min CN=74/0 Runoff=0.06 cfs 0.004 af Pond 3: Pervious Pavers Peak Elev=414.28' Storage=503 cf Inflow=0.70 cfs 0.052 af Discarded=0.11 cfs 0.052 af Primary=0.00 cfs 0.000 af Outflow=0.11 cfs 0.052 af Pond 5: Pipes Peak Elev=411.42' Storage=176 cf Inflow=0.59 cfs 0.043 af Discarded=0.03 cfs 0.026 af Primary=0.50 cfs 0.017 af Outflow=0.53 cfs 0.043 af Link 7: Proposed Inflow=0.56 cfs 0.021 af Primary=0.56 cfs 0.021 af Total Runoff Area = 0.746 ac Runoff Volume = 0.197 af Average Runoff Depth = 3.17" 31.13% Pervious = 0.232 ac 68.87% Impervious = 0.514 ac 67