J_2024 05 09_West Orange Stormwater Management Plan

10 1 / LEGEND X x X /x I\ W' -600- <y J //, & NOTES: V', DISGHiiffGE' 1. NJ STATE PLANE COORDINATE SYSTEM HORIZONTAL DATUM = NAD-83(2007) VERTICAL DATUM = k) NAVD-88 N X ONLY PSE&G LAND RIGHTS HAVE BEEN SURVEYED. ADJOINING TAX LOTS ARE SHOWN FOR INFORMATION 9 EX-DA 1 ONLY. Ny X DA EX V (• y REFERENCES: EASEMENT LINE - EXISTING MAJOR CONTOUR LINE - EXISTING MINOR CONTOUR LINE - EXISTING FENCE LINE - LIMIT OF DISTURBANCE - DRAINAGE AREA - EXISTING GRASS SURFACE - EXISTING MEADOW SURFACE - EXISTING BRUSH SURFACE - EXISTING GRAVEL DRIVE SURFACE - EXISTING GRAVEL SURFACE - EXISTING YARD STONE SURFACE - IMPERVIOUS SURFACE (BUILDINGS Sc FOUNDATIONS) - EXISTING PAVED SURFACE - DRAINAGE INLET - SOILS // woods ggsfeS oo X -lrn WOODS t’6- X ••• * X XT / URBONB / X f / I EX / /iA . / <7 / ■ / Udbonc ’/■■/■■/it '/■ //■■/ / * - * • . Tj aj , • * • -■ % URBONB I - SOIL DESIGNATION / Ws, TosaVBLDG's .• TWR 5/6 REMOVED. • A / S* •. Y/-. / y ■y . .602 \ X f§p TWR 5/5/ o X. X */ )k~ ■ y X EX-DA 9A /k x s/ / / /X / \/ '\ / ^ / N/ A»\M / a NT BUTARY SX i/ «>„ o X X / \ ♦ r \ l£ , s v/ % Yi X/ V X / / //X X/ / / f? o / o / 7 ¥/ EX-DA 3 / %• X < STING X EX omtainmen. . s <7 ms / n A \ u A *X\ X'*' EX \x - *3 O/v / x> V4; / 7 / / .x / WOODS / 3 /, ♦ c ''' ’O' % / / y. / Vi )NB / / f / f / J T- V / EX DA Sf / V G <G s LX Xs / fc> X. ’to 0 A' rx O// X X X x / / / / / / / -•x 5=, T*2z / i X Li XJ / A rs 626 <37 , 26,372SF GRASS 263,252SF BRUSH 50,888SF NON-CONTRIBUTORY 9,248SF DRAINAGE AREA EX-OA 1 Composite CN = 81, Tc Path = 18.2 min Impervious 11158 Gravel Road 661 Grass 53293 Brush 141S9 Total 79301 DRAINAGE AREA EX-0A 2 Composite CN = 83, Tc Path = 22,9 mitt Impervious 4190 Grass 10038 Brash 3705 Total 17933 DRAINAGE AREA EX*OA 3 Composite CN = 88, Tc Path = 5.0 min Impervious 3042 Gravel Road 35019 Grawi 29686 Grass 30906 Meadow 26372 Total 125025 DRAINAGE AREA EX-DA4 Composite CN = 91, Tc Path = 14,2 min Impervious 31370 Gravel Road 5072 Grave! 12803 Yard stone 8134 Grass 21568 Total 78947 DRAINAGE AREA EX-DA 5 Composite CN = 96, Tc Path = 1.8 min 17517 Impervious Grass 2694 Total 20211 DRAINAGE AREA EX-DA 6 Composite CN = 82, Tc Path

Grave! 12803 Yard stone 8134 Grass 21568 Total 78947 DRAINAGE AREA EX-DA 5 Composite CN = 96, Tc Path = 1.8 min 17517 Impervious Grass 2694 Total 20211 DRAINAGE AREA EX-DA 6 Composite CN = 82, Tc Path =16.9 m i n Imperious 9501 Gravel Road 848! Yard stone 43082 Grass 57041 Brush 27592 Non-Contri bylory 1964 Total '47661 DRAINAGE AREA EX-OA 7 Composite CN = 81, Tc Path = 7.T min Impervious 805 Gravel Road 2198 Yard stone 10157 Grass 86177 Brush 5402 Total 104739 DRAINAGE AREA EX-DA 8 Composite CN = 89, Tc Path s 28,4 min impervious 15912 Yard stone 29261 Grass 1535 Non-Contributory 982 Total 47690 DRAINAGE AREA EX-DA 9A Composite CN = 86, Tc Path = 31.4 min Imperious 1344 Yard slone 20580 Total 21924 DRAINAGE AREA EX-DA 9B Composite CN = 92. Tc Path = 31.0 min Impervious 24703 Gravel 670 Yard stone 20336 Total 45709 / S NO. /'V' 628 REVISION P r~> ^^SOIL NAME DESCRIPTION HSG UdbonB UDORTHENTS, BOONTON SUBSTRATUM, 0 to 8% SLOPES “D" HSG URBONB URBAN LAND. BOONTON SUBSTRATUM, 0 to 8% SLOPES — US80NB URBAN LAND, BOONTON SUBSTRATUM-800NT0N COMPLEX. 0 to 8% SLOPES — SOIL INFORMATION OBTAINED FROM NATURAL RESOURCE CONSERVATION SERVICES (NRCS) U.S. DEPARTMENT OF AGRICULTURE, WEB SOIL MAP FOR UNION COUNTY, NEW JERSEY. SURVEY, w/ NON-CONTRIBUTORY 689,140 SF w/o NON-CONTRIBUTORY 686,194 SF DATE ANALYSIS POINT "A” TABLE STORM EVENT VOLUME (AF) 2 YR 2.684 23.25 10 YR 4.777 41.95 100 YR 9.133 79.82 NJDEP 0.541 10.16 PEAK FLOW (CFS) 80 160 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: PRE-DEVELOPMENT DRAINAGE AREA PLAN X / y EX-DA 5 131,550SF MEADOW TOTAL AREA /: / s 43,159 SF YARD STONE / SOio X kx / o / \ -a m // /= X '•is 51,431SF GRAVEL ' /? / m 119,542SF GRAVEL ROADS / X2 / / <7 XN /V / /■fS’A / FOUNDATIONS TWR 5/5^V / V \ \ IMPERVIOUS c/Y PAVED ROADS, BUILDINGS & OO < 2> / \!K / /\JK Areas calculated within the Drainage Area Line: ' <3> / / \ XISTTWRS TO E REMOVED EX-D-A 9B PRE-DEVELOPMENT DRAINAGE AREA SUMMARY 2*, / I we 5/6-1 { sit/ * \v «r> \y . ■**•/■■/■■//'* c&r' LL I I IS / V' ® : X'\ C.A.D.D.

Line: ' <3> / / \ XISTTWRS TO E REMOVED EX-D-A 9B PRE-DEVELOPMENT DRAINAGE AREA SUMMARY 2*, / I we 5/6-1 { sit/ * \v «r> \y . ■**•/■■/■■//'* c&r' LL I I IS / V' ® : X'\ C.A.D.D. UPDATE: A <0 —620_ \“ BARRY J. SUTHERLAND, PE Project No.: 182614 Scale: AS SHOWN Drawn By: JS Date: 02/ 09/2012 Checked By: BJS Drawing No.: NEW JERSEY PROFESSIONAL ENGINEER GE 29135 FOR REVIEW ONLY NOT FOR CONSTRUCTION SOIL APPENDIX B-2 Dote Copyright ©2011 50 UiJtfl wmwtMM > PLOT DATE: S&1tdale$$$‘ 1, -. ^ - Lxxxxxxv/YY \u. i. ROSELAND-METUCHEN R/W LINE ADJOINING PROPERTY LINE \S X RIGHT OF WAY INFORMATION BASED ON SURVEYS PREPARED ' THROUGH FEBRUARY 9, 2011, BY DRESDNER ROBIN, W^TNE, NJ, MASER CONSULTING P.A., HAMILTON, NJ, KELLER & KIRKPATRICK, MORRIS PLAINS, NJ AND FRALINGER ENGINEERING, BRIDGETON, x ■. - X \ NOVEMBER 2010. '. X N\ \\\\' \ - o X\ —595— % A \ 7/ X o 1. PHOTOGRAMMETRIC SURVEY BY PHOTO SCIENCE, INC.g WEST CHESTER, PENNSYLVANIA, DATED MARCH 2009 THRO0GH 11