J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Prepared by TRC Engineers, Inc. NJ DEP 2-hrNJDEP Rainfall=1.25" Printed 3/4/2012 HydroCAD® 9,10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 86 Summary for Link Discharge: Analysis Point A Inflow Area = Inflow = Primary = 15.753 ac, 24.92% Impervious, Inflow 10.16 cfs @ 1.19 hrs, Volume= 10.16 cfs @ 1.19 hrs, Volume= Depth = 0.541af 0.541 0.41" for NJDEP event af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Link Discharge: Analysis Point A Hydrograph H' ' '/ :-- .-- 1 T—T I 1 in 1ft r* 10.16 Cfs 1 L-J L _ 1 .. J I. . 1 _ J _ I. - L I - J _ .1 Inflow Area=15 ----------------; _ _ _ l. . I _ . . 753 ac * . .. 4 - ,-J„. _L - ._1 I J_____ ___ L _ 1 _ i0 t5 -4- _ _ I_I 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Time (hours) « - J._ I Inflow I I Primary |

PSE&G West Orange Switching Station West Orange, NJ Stormwater Management Report Appendix D - Post Development Drainage Area Plan TRC Engineers, Inc. March 2012

10 LEGEND - NOTES: 1. DISCHARGE n NJ STATE PLANE COORDINATE SYSTEM HORIZONTAL DATUM = NAD-83(2007) VERTICAL DATUM = 600- — SO! - NAVD-88 2. ONLY PSE&G LAND RIGHTS HAVE BEEN SURVEYED. ADJOINING TAX LOTS ARE SHOWN FOR INFORMATION ROSELAND-METUCHEN R/W LINE ADJOINING PROPERTY LINE - EASEMENT LINE - EXISTING CONTOUR LINE - NEW MAJOR CONTOUR LINE NEW MINOR CONTOUR LINE EXISTING FENCE LINE - NEW FENCE LINE - LIMIT OF DISTURBANCE ■ - DRAINAGE AREA / PO-DA 1 ONLY. - / - GRASS SURFACE - MEADOW SURFACE - BRUSH SURFACE - GRAVEL DRIVE SURFACE - GRAVEL SURFACE - YARD STONE SURFACE - PAVED SURFACE REFERENCES: 1. ✓ PHOTOGRAMMETRIC SURVEY BY PHOTO SCIENCE, INC., WEST / CHESTER, PENNSYLVANIA, DATED MARCH 2009 THROUGH / NOVEMBER 2010. 2. PO-DA 2 / RIGHT OF WAY INFORMATION BASED ON SURVEYS PREPARED THROUGH FEBRUARY 9, 2011, BY DRESDNER ROBIN, WAYNE, NJ, MASER CONSULTING P.A., HAMILTON, NJ, KELLER & KIRKPATRICK, ;|ORE / fiSSIN RIPRAP / / / MORRIS PLAINS, NJ AND FRALINGER ENGINEERING, BRIDGETON, NJ. / / PO-DA 1A URBONB / / GATE PO / 9B DA / [UdbonB 1 A / £ x AS X / \ £ X 20 GA RETNG X / I - IMPERVIOUS SURFACE ' BUILDINGS & FOUNDATIONS PO-DA 3B lORE FENCE / /7 HMI £ X ■Y RUC WA EXISTING DRAINAGE INLET - NEW MANHOLE (CLEAN-OUT) - NEW MANHOLE (CATCH BASIN) X ■* X X % x« ~ SOILS EE X♦ X / \ ’o/i DA i 9D GATE \ 4 X \ / j X / wmm X \X/ *1 \ PO-DA 8 f X i $n NEW OIL- ._____________________ / jL cqntainmentV: * ■ >M^.N5n-CON rRlBUTORY t Areas V ^Hvafea X \ / \ / \ IMPERVIOUS A ♦ / / ♦ X > X \ V * / N/ X * O-DA 3A X,' NEW oil contain '--CONTAINMENT NON-CONTRIBUTORY AREA \ \ * \ ♦ \ \ \ / / X BRUSH 28,369 SF NON-CONTRIBUTORY 9,672 SF w/ NON-CONTRIBUTORY 689,600 SF w/o NON-CONTRIBUTORY 679,928 SF 2C / / X 5A r- \ r 27 / x / X m RET / A_ APPLICANT: PSE&G 7 80 PARK PLACE / NEWARK, NJ 07102-4194 610 X A / / ©TRC e X / X X X / / X / X / / / / / X / X X X X / / / / /V / / X // // X X X X / TOWNSHIP OF WEST ORANGE, ESSEX COUNTY, NEWJERSEY / X \ X / X NO, REVISION DATE / < TITLE: POST-DEVELOPMENT SURFACE COVER TYPE PLAN / X PO-DA 5B WEST ORANGE SWITCHING STATION / // 1/ X 7 / I/ I/ X (973 ) 564-6006 NO. PHONE (973)56>4-6131 NO. FAX Certificate of

TE / < TITLE: POST-DEVELOPMENT SURFACE COVER TYPE PLAN / X PO-DA 5B WEST ORANGE SWITCHING STATION / // 1/ X 7 / I/ I/ X (973 ) 564-6006 NO. PHONE (973)56>4-6131 NO. FAX Certificate of Authorize ition #24GA28047100 / / / X PO-DA 6 PO-DA 4 / / / 'ngineers Inc. SIrREET WILLOW E. 57 NEW JERSEY 07041 MILLBURN, / / / JL BARRY J. SUTHERLAND, PE NEW JERSEY PROFESSIONAL ENGINEER GE 2913§ FOR REVIEW ONLY NOT FOR CONSTRUCTION Project No.: 182614 Scale: AS SHOWN Drawn By: JS Date: 03/12/2012 Checked By: BJS Drawing No.: APPENDIX D-1 FILE: T:\E_CAD\1B2614_west oronge\emoiLmorcM2„2012\pQBtdev_surfoce orea_Q3 12 12.dwg 160 / 608 614 \ BO ■N 609 jrbon: 40 / SOP RE 612 / < 89,408SF 185,396 SF / V DA x / MEADOW GRASS 7 X W CO­ NTAINMENT UT CQNTRIB A.R e a # X 214,815 SF / / \ 6,800 SF / WOODS / X GRAVEL ENCE N 60 X 59,102 SF X 20 / X GRAVEL ROADS TOTAL AREA ✓ X / 96,128 SF FOUNDATIONS / / X Line: X HA % \ X % 90 DA \ / \ Area Drainage PAVED ROADS, BUILDINGS & *! RET 4 PO X \ \ the YARD STONE X \ within calculated & / X GATE 4 X FENCE / / POST-DEVELOPMENT SURFACE COVER TYPE SUMMARY X PO-DA 9A / / URBONBl- SOIL DESIGNATION X % X PO-DA 7 - Date Copyright © 2011 10

1 0 LEGEND - ROSELAND-METUCHEN R/W LINE ADJOINING PROPERTY LINE - EASEMENT LINE - EXISTING CONTOUR LINE - NEW MAJOR CONTOUR LINE NEW MINOR CONTOUR LINE EXISTING FENCE LINE NAVD-88 - NEW FENCE LINE ONLY PSE&G LAND RIGHTS HAVE BEEN SURVEVED. - LIMIT OF DISTURBANCE DRAINAGE AREA - GRASS SURFACE - MEADOW SURFACE - BRUSH SURFACE - GRAVEL DRIVE SURFACE - GRAVEL SURFACE - YARD STONE SURFACE - PAVED SURFACE - IMPERVIOUS SURFACE BUILDINGS & FOUNDATIONS - EXISTING DRAINAGE INLET - NEW MANHOLE (CLEAN-OUT) - NEW MANHOLE (CATCH BASIN) - SOILS - SOIL DESIGNATION - NOTES: DISCHARGE J3 NJ STATE PLANE COORDINATE SYSTEM HORIZONTAL 600 - — 601 — DATUM = NAD-83(2007) VERTICAL DATUM = 2. ADJOINING TAX LOTS ARE SHOWN FOR INFORMATION w PO-DA 1 ONLY. xX y / REFERENCES: 1. PHOTOGRAM METRIC SURVEY BY PHOTO SCIENCE, INC., WES / CHESTER, PENNSYLVANA, DATED MARCH 2009 THROUGH '7 // NOVEMBER 2010. PO-DA 2 / RIGHT OF WAY INFORMATION BASED ON SURVEYS PREPARED / THROUGH FEBRUARY 9, 2011, BY DRESDNER ROBIN, WAYNE, MASER CONSULTING P.A., HAMILTON, NJ, KELLER"& KlRKPATRl / MCSRS PLAINS, NJ AND FRAUNGER ENGINEERING, BRIDGETON, NJ. / / ,/ PO-DA 1A / / DA \ 13 / y / , ' URBONB / / / GA'3 / C-DA PO / DA 9B £JC X AC XX / PO-DA 38 4* / FELICE Udbo / X / / / \ X V: X / X 20 GA X X ETN ALL / yj. / / X X jS X / Ex X / DA X 9D •Wf, N X GATE ♦ X =0 DA x 9A x X / / / / / MOB VHS 7 \A / / J X X RET/NG X ▲> X ♦ DA 9G 3 * / ♦ V */ x \ / X / ♦ ^^\5\-COnTRi3iJTCRY / FEN X 79 \ PO-DA 8 $> Ngw OIL-H »[_ X / / X O-DA 3A / X * / X / X / 0. X * WALL li ✓ f &o VO- X / SAiE ♦ / / y x: / ^BnIXnTRIBUT / X ORY / ♦ ENCE.// X X / -20'(«ATE X / X \ > / X / ♦ / X / 20 NMEN / 9" aL / X / X PO-DA 7 X ^PO-DA 5A « X ■-0- Q/o :----- '3 X X RET NG WALL# 607 / X x A / URBONB / 608 612 / / X i / X X A 7m, / X / / 609 / 670 611 < Ars e!3 X / / X X / X / / X / / X t / / / / X l: o X X / / / / X X X X X 1/ X / / I/ I/ X PO-DA 6 PO-DA 4 / / / / / / r / / / / / X X X X X X X /\ / X NO. DRAINAGE AREA PO-CA1 Composite CN = 83, Tc Path = 18.2 min Impervious 11168 Grass 38971 Meadow 8088 58227 DRAINAGE AREA PO-DA1A Composite

/ / / / r / / / / / X X X X X X X /\ / X NO. DRAINAGE AREA PO-CA1 Composite CN = 83, Tc Path = 18.2 min Impervious 11168 Grass 38971 Meadow 8088 58227 DRAINAGE AREA PO-DA1A Composite CN = 81, Tc Path = 4.7 min Imperious 2107 Meadow 10364 12471 DRAINAGE AREA PO-OA1B Composite CN = 82, Tc Path = 2.7 min Imperious 1769 Meadow 6795 8564 DRAINAGE AREA PO-DA1C Composite CN = 87, Tc Path -1.0 min j Impervious 4402 Meadow 5534 9936 DRAINAGE AREA PO-OA2 Composite CN = 79, Tc Path = 17.6 min Grass S261 Meadow 19890 29151 DRAINAGE AREA PO-DA3A Composite CN = 88, Tc Path = 14.5 min Gravel Road 10141 Meadow 10571 20712 DRAINAGE AREA PO-DA3B Composite CN = 91, Tc Path s 2.1 min Impervious 5785 ■Gravel Road 1111 Meadow 3792 10688 DRAINAGE AREA PO-OA4 Composite CN = 84, Tc Path 2 10.8 min Impervious 4334 Grate) Road 5398 Grass 14366 Meadow 15808 39906 DRAINAGE AREA PO-OA5A Composite CN = 88, Tc Path = 2.5 min Impervious 15734 Grass 8318 Meadow 7713 Noncontributory 2364 34129 DRAINAGE AREA PO-DA5B Composite CN = 94, Tc Path a 1.9 min Impervious 16509 Gravel 6800 Grass 2441 25750 DRAINAGE AREA PO-OA6 Composite CN = 82, Tc Path = 14.3 min Impervious 13009 Yard stone 47083 Grass 39774 Meadow 853 Brush 22963 Noncontributory 4135 127817 DRAINAGE AREA PO-DA7 Composite CN = 81, Tc Patti « 7.7 mfn Imperious 1868 Yard stone 14410 Grass 72265 Brush 5406 93949 DRAINAGE AREA PO-DA8 Composite CN = 94, Tc Path a 31.7 min Imperious 10980 Yard stone 5243 Noncontributory 3173 19396 DRAINAGE AREA PO-OA9A Composite CN = 86, Tc Path a 28,5 min Impervious 650 Gravel Road 1367 Yard stone 46220 48237 DRAINAGE AREA PO-DA98 Composite CN = 89, Tc Path = 21.5 min Impervious 5504 Grave! Road 6361 Yard stone 30963 42828 DRAINAGE AREA PO-OA9C Composite CN = 90, Tc Path “ 15.0 min Impervious 1117 Grate! Road 18457 Yard stone 33086 52660 DRAINAGE AREA PO-OA9D Composite CN = 89, Tc Path “ 14,5 min Impervious 1192 Gravel Road 16177 Yard stone 37810 55179 REVISiON DATE POST-DEVELOPMENT DRAINAGE AREA SUMMARY Areas calculated within the Drainage Area Line: IMPERVIOUS PAVED ROADS, BUILDINGS & FOUNDATIONS 96,128 SF GRAVEL ROADS 59,102 SF GRAVEL 6,800 SF YARD STONE 214,815 SF MEADOW 89,408 SF GRASS 185,396 SF BRUSH 28,369 SF NON-CONTRIBUTORY 9,672 SF TOTAL AREA w/ NON-CONTRIBUTORY 689,600 SF w/o NON-CONTRIBUTORY 679,928 SF ANALYSIS POINT ”A” TABLE STORM EVENT VOLUME

89,408 SF GRASS 185,396 SF BRUSH 28,369 SF NON-CONTRIBUTORY 9,672 SF TOTAL AREA w/ NON-CONTRIBUTORY 689,600 SF w/o NON-CONTRIBUTORY 679,928 SF ANALYSIS POINT ”A” TABLE STORM EVENT VOLUME (AF) PEAK FLOW (CFS) 2 YR 2.379 21.97 10 YR 4.371 39.70 100 YR 8.685 75.50 NJDEP 0.460 9.30 4G 60 160 APPLICANT: PSE&G 80 PARK PLACE NEWARK, NJ 07102-4194 ©trc Engineers Inc. 57 E. WILLOW STREET MILLBURN, NEW JERSEY 07041 PHONE NO. (973) 564-6006 FAX NO. (973)564-6131 Certificate of Authorization #24GA28047100 WEST ORANGE SWITCHING STATION TOWNSHIP OF WEST ORANGE, ESSEX COUNTY, NEW JERSEY TITLE: POST-DEVELOPMENT DRAINAGE AREA PLAN / / < URBONB / PO-DA 5B BARRY J. SUTHERLAND, PE Project No.: 182614 Scale: AS SHOWN Drawn By: JS Date: 03/12/2012 Checked By: BJS Drawing No.: NEW JERSEY PROFESSIONAL ENGINEER GE 29135 FOR REVIEW ONLY NOT FOR CONSTRUCTION APPENDIX D-2 THIS DRAWING REFERENCES BUT IS NOT LINKED FILE: T:\E_CAD\182S14_west oronge\EMAIl 3-14-12\postdev_droinage_03 12 12,dwg TO: T:\E_CAD\182614_west oronge\EMAIL 3-14-12\West Oronge oreos_01 17 12-2.xls Date Copyright © 2011

PSE&G West Orange Switching Station West Orange, NJ Stormwater Management Report Appendix E - Post Development HydroCad Results TRC Engineers, Inc. March 2012

1A 1B 1A 1C 3A 1L 38 1B 1C PO-DA to CB 1 \ -» 3B Basin 5 ----Basin 4 Basin 3 Basin 2 Basin 1 Reach 1 Link Drainage Diagram for Post Development West Orange A_03 01 12 Prepared by TRC Engineers, Inc., Printed 3/14/2012 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC

Post Development West Orange A_03 01 12 Printed Prepared by TRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC 3/14/2012 Page 2 Pipe Listing (all nodes) Line# Node In-Invert Out-Invert Length Slope Number (feet) (feet) (feet) (ft/ft) n Diam/Width Height Fill (inches) (inches) (inches) 1 3A 0.00 0.00 50.0 0.0200 0.020 15.0 0.0 0.0 2 Basinl 601.00 600.00 140.0 0.0071 0.020 15.0 0.0 0.0 3 Basin2 594.00 592.00 78.0 0.0256 0.020 12.0 0.0 0.0 0.020 0.0 4 Basin3 590.50 589.50 47.0 0.0213 15.0 0.0 5 Basin4 585.00 584.00 37.0 0.0270 0.020 15.0 0.0 0.0 6 Basin5 580.50 580.00 65.0 0.0077 0.020 15.0 0.0 0.0