LOI Exhibit D - Conceptual Drawings of Encroachment of DPW Facility on MBTA ... — File 207949

40 40 36 36 36 36 38 38 38 38 42 42 44 44 46 46 46 46 312+00.00 313+00.00 314+00.00 312+00.00 313+00.00 314+00.00 168+00.00 169+00.00 170+00.00 J J D D D D D S S S DIV TEMP ROW EASEMENT 4" HDPE UNDERDRAIN DRAINAGE NIP (DP 11) UTILITY POLE TO BE REMOVED 4" HDPE UNDERDRAIN INVERT=45.80 PORTION OF EXISTING 12" WATER MAIN TO BE RELOCATED. SEE SHEET RWS-U-6001. NOISE BARRIER N-10 NIP (DP19) 4" HDPE UNDERDRAIN ROW RETAINING WALL ME-2 SOLDIER PILE WITH DRILLED SHAFT TYP DRAINAGE NIP (DP 11) SANITARY SEWER SIPHON NIP (DP 11) OCS FOUNDATION TYP NIP (DP 54) DRAINAGE NIP (DP 11) ROW PROPOSED C NH-T1 L PROPOSED C NH-T2 L PROPOSED C MB-EB L PROPOSED C MB-WB L 10'-0" TYP UNO UTILITY POLE TO BE REMOVED 12'-0" 11" 4.72' 3.09' 3.84' 3.01' 8'-0" 11 3/4" SOMERVILLE DEPARTMENT OF PUBLIC WORKS BUILDING SOMERVILLE DEPARTMENT OF PUBLIC WORKS BUILDING EXISTING SANITARY SEWER SIPHON TO BE RELOCATED KINK POINT MB-EB STA 312+98.22 OFFSET 42.62 N: 2969321.98 E: 762246.76 11.41' 8.50' MIN REQUIRED KINK POINT MB-EB STA 311+89.14 OFFSET 43.21 N: 2969225.43 E: 762299.45 11.90' 2.84' SEE NOTE 5 SEE NOTE 5 45 44 4" HDPE UNDERDRAIN INVERT=42.8 PERMANENT GROUND ANCHOR TYP 45'-0" MAX TYP SPL RETAINING WALL ME-2 PLAN ISSUE DATE DESCRIPTION BY CHK'D APP. SCALE: DATE: DRAWN BY DESIGN BY CHECK BY ISSUE SHEET: PLAN NO.: MBTA CONTRACT NO. E22CN07 CAMBRIDGE / SOMERVILLE / MEDFORD, MASSACHUSETTS MASSACHUSETTS BAY TRANSPORTATION AUTHORITY GREEN LINE EXTENSION PROJECT PLOTTED: 01/11/19 4:18PM BY:PFEIFECM DRAWING: I:\PROJECTS\4019139\4019139_0001\90_CAD MODELS AND SHEETS\18B RET & NOISE WALL MB_SEG 4\06_S_STRUCTURAL\SHEETS\RWS-S-2012.DWG [RWS-S-2012] 01/11/19 3:49PM PRE-RELEASE FOR CONSTRUCTION DESIGN PACKAGE: 18B (RWS) WALL ME-2 PLAN SHEET 2 OF 5   RWS-S-2012   CMP ARG ARG 12/19/18 AS NOTED                                                 NOT AUTHORIZED FOR CONSTRUCTION B S-4013 MATCHLINE - SEE SHEET RWS-S-2013 FOR CONTINUATION MATCHLINE - SEE SHEET RWS-S-2011 FOR CONTINUATION BERWICK ST 0 10' 5' 10' 1. SEE SHEETS RWS-G-0501, RWS-S-1001, AND RWS-S-1002 FOR GENERAL NOTES. 2. SEE SHEET RWS-S-3014 FOR RETAINING WALL ELEVATION. 3. SEE SHEET RWS-S-4001 FOR RETAINING WALL TYPICAL SECTIONS. 4. SEE SHEETS RWS-S-8001 AND RWS-S-8002 FOR RETAINING WALL DETAILS. 5. A 250 PSF SURCHARGE LOADING WAS USED IN THE DESIGN OF THIS WALL TO ACCOUNT FOR RESIDENTIAL BUILDINGS WITHIN THE WALL'S ZONE OF INFLUENCE. 6. A 1.4 KSF FOUNDATION SURCHARGE LOADING AND A 250 PSF GROUND FLOOR LIVE LOAD SURCHARGE LOADING WAS USED IN THE DESIGN OF THIS WALL TO ACCOUNT FOR THE SOMERVILLE DPW BUILDING WITHIN THE WALL'S ZONE OF INFLUENCE. 7. SPL RETAINING WALL ME-2 SEQUENCE OF CONSTRUCTION IN FRONT OF SOMERVILLE DPW BUILDING: 7.1. INSTALL DRILLED SHAFT FOUNDATIONS AND THEN WALL PILES. 7.2. INSTALL TEMPORARY WALL BRACING TO SUPPORT REQUIRED EXCAVATION FOR DRAINAGE PIPES IN FRONT OF WALL. ONCE THIS EXCAVATION HAS BEEN SUITABLY BACKFILLED, TEMPORARY WALL BRACING WILL BE REMOVED. 8. SEQUENCE OF CONSTRUCTION FOR SEGMENTS OF WALL NOT IN FRONT OF DPW BUILDING SIMILAR, BUT NO TEMPORARY WALL BRACING IS REQUIRED DURING INSTALLATION OF DRAINAGE IN FRONT OF WALL. NOTES: 41' MAX 300 SF EXHIBIT D - CONCEPTUAL DRAWINGS OF ENCHROACHMENT OF DPW FACILITY ON MBTA ROW SHEET 1 OF 5

40 34 34 34 34 36 36 38 38 42 44 D 315+00.00 316+00.00 315+00.00 316+00.00 171+00.00 172+00.00 J J ROW TEMP ROW EASEMENT REMOVE EXISTING 18" PVC AND MANHOLE 4" HDPE UNDERDRAIN NOISE BARRIER N-10 NIP (DP19) SOLDIER PILE WITH DRILLED SHAFT TYP DRAINAGE NIP (DP 11) RETAINING WALL ME-2 OCS FOUNDATION TYP NIP (DP 54) DRAINAGE NIP (DP 11) ROW FOR DRAINAGE OUTLET TO DPW BUILDING, SEE SHEET RWS-U-2002 PROPOSED C NH-T1 L PROPOSED C NH-T2 L PROPOSED C MB-EB L PROPOSED C MB-WB L 8'-0" TYP UNO 6'-0" 6'-0" 2.93' 2.61' 0.20' END NOISE BARRIER N-10 MOUNTED ATOP RETAINING WALL ME-2 MB-EB STA 314+51.94 N: 2969455.79 E: 762170.83 SOMERVILLE DEPARTMENT OF PUBLIC WORKS BUILDING 8.50' MIN REQUIRED KINK POINT MB-EB STA 315+67.87 OFFSET 40.94 N: 2969556.56 E: 762113.10 9.70' 2.53' KINK POINT MB-EB STA 314+91.94 OFFSET 41.54 N: 2969490.63 E: 762150.89 9.77' 2.23' SOMERVILLE DEPARTMENT OF PUBLIC WORKS BUILDING KINK POINT MB-EB STA 314+35.94 OFFSET 41.61 N: 2969441.85 E: 762178.39 9.70' 2.20' 4" HDPE UNDERDRAIN INVERT=38.7 CONNECT TO TRACK DRAINAGE PERMANENTGROUND ANCHOR TYP 45'-0" MAX TYP SPL RETAINING WALL ME-2 PLAN ISSUE DATE DESCRIPTION BY CHK'D APP. SCALE: DATE: DRAWN BY DESIGN BY CHECK BY ISSUE SHEET: PLAN NO.: MBTA CONTRACT NO. E22CN07 CAMBRIDGE / SOMERVILLE / MEDFORD, MASSACHUSETTS MASSACHUSETTS BAY TRANSPORTATION AUTHORITY GREEN LINE EXTENSION PROJECT PLOTTED: 01/11/19 4:20PM BY:PFEIFECM DRAWING: I:\PROJECTS\4019139\4019139_0001\90_CAD MODELS AND SHEETS\18B RET & NOISE WALL MB_SEG 4\06_S_STRUCTURAL\SHEETS\RWS-S-2013.DWG [RWS-S-2013] 01/11/19 3:56PM PRE-RELEASE FOR CONSTRUCTION DESIGN PACKAGE: 18B (RWS) WALL ME-2 PLAN SHEET 3 OF 5   RWS-S-2013   CMP ARG ARG 12/19/18 AS NOTED                                                 NOT AUTHORIZED FOR CONSTRUCTION A S-4013 MATCHLINE - SEE SHEET RWS-S-2014 FOR CONTINUATION MATCHLINE - SEE SHEET RWS-S-2012 FOR CONTINUATION 1. SEE SHEETS RWS-G-0501, RWS-S-1001, AND RWS-S-1002 FOR GENERAL NOTES. 2. SEE SHEET RWS-S-3013 FOR RETAINING WALL ELEVATION. 3. SEE SHEET RWS-S-4001 FOR RETAINING WALL TYPICAL SECTIONS. 4. SEE SHEETS RWS-S-8001 AND RWS-S-8002 FOR RETAINING WALL DETAILS. 5. A 1.4 KSF FOUNDATION SURCHARGE LOADING AND A 250 PSF GROUND FLOOR LIVE LOAD SURCHARGE LOADING WAS USED IN THE DESIGN OF THIS WALL TO ACCOUNT FOR THE SOMERVILLE DPW BUILDING WITHIN THE WALL'S ZONE OF INFLUENCE. 6. SPL RETAINING WALL ME-2 SEQUENCE OF CONSTRUCTION IN FRONT OF SOMERVILLE DPW BUILDING: 6.1. INSTALL DRILLED SHAFT FOUNDATIONS AND THEN WALL PILES. 6.2. INSTALL TEMPORARY WALL BRACING TO SUPPORT REQUIRED EXCAVATION FOR DRAINAGE PIPES IN FRONT OF WALL. ONCE THIS EXCAVATION HAS BEEN SUITABLY BACKFILLED, TEMPORARY WALL BRACING WILL BE REMOVED. NOTES: 0 10' 5' 10' 41' MAX 9,900 SF EXHIBIT D - CONCEPTUAL DRAWINGS OF ENCHROACHMENT OF DPW FACILITY ON MBTA ROW SHEET 2 OF 5

40 32 32 32 32 34 34 36 36 38 42 D 317+00.00 318+00.00 319+00.00 317+00.00 318+00.00 319+00.00 173+00.00 174+00.00 175+00.00 J J 4" HDPE UNDERDRAIN 4" HDPE UNDERDRAIN INVERT=40.1 TEMP ROW EASEMENT REMOVING EXISTING 18" PVC AND MANHOLE 4" HDPE UNDERDRAIN ROW SOLDIER PILE WITH DRILLED SHAFT TYP DRAINAGE NIP (DP 11) RETAINING WALL ME-2 DRAINAGE NIP (DP 11) ROW OCS FOUNDATION TYP NIP (DP 54) FOR DRAINAGE OUTLET TO DPW BUILDING, SEE SHEET RWS-U-2001 PROPOSED C NH-T1 L PROPOSED C NH-T2 L PROPOSED C MB-EB L PROPOSED C MB-WB L 8'-0" TYP UNO 7'-0" 7'-0" 7'-0" 6'-0" 2.76' 2.78' SOMERVILLE DEPARTMENT OF PUBLIC WORKS KINK POINT MB-EB STA 318+26.48 OFFSET 40.01 N: 2969780.89 E: 761983.65 9.63' 2.38' 5 3/4" BUILDING 8.50' MIN REQUIRED PERMANENT GROUND ANCHOR TYP 45'-0" MAX TYP SPL RETAINING WALL ME-2 PLAN ISSUE DATE DESCRIPTION BY CHK'D APP. SCALE: DATE: DRAWN BY DESIGN BY CHECK BY ISSUE SHEET: PLAN NO.: MBTA CONTRACT NO. E22CN07 CAMBRIDGE / SOMERVILLE / MEDFORD, MASSACHUSETTS MASSACHUSETTS BAY TRANSPORTATION AUTHORITY GREEN LINE EXTENSION PROJECT PLOTTED: 01/11/19 4:23PM BY:PFEIFECM DRAWING: I:\PROJECTS\4019139\4019139_0001\90_CAD MODELS AND SHEETS\18B RET & NOISE WALL MB_SEG 4\06_S_STRUCTURAL\SHEETS\RWS-S-2014.DWG [RWS-S-2014] 01/11/19 4:09PM PRE-RELEASE FOR CONSTRUCTION DESIGN PACKAGE: 18B (RWS) WALL ME-2 PLAN SHEET 4 OF 5   RWS-S-2014   CMP ARG ARG 12/19/18 AS NOTED                                                 NOT AUTHORIZED FOR CONSTRUCTION MATCHLINE - SEE SHEET RWS-S-2015 FOR CONTINUATION MATCHLINE - SEE SHEET RWS-S-2013 FOR CONTINUATION A S-4013 0 10' 5' 10' 1. SEE SHEETS RWS-G-0501, RWS-S-1001, AND RWS-S-1002 FOR GENERAL NOTES. 2. SEE SHEET RWS-S-3012 FOR RETAINING WALL ELEVATION. 3. SEE SHEET RWS-S-4001 FOR RETAINING WALL TYPICAL SECTIONS. 4. SEE SHEETS RWS-S-8001 AND RWS-S-8002 FOR RETAINING WALL DETAILS. 5. A 1.4 KSF FOUNDATION SURCHARGE LOADING AND A 250 PSF GROUND FLOOR LIVE LOAD SURCHARGE LOADING WAS USED IN THE DESIGN OF THIS WALL TO ACCOUNT FOR THE SOMERVILLE DPW BUILDING WITHIN THE WALL'S ZONE OF INFLUENCE. 6. SPL RETAINING WALL ME-2 SEQUENCE OF CONSTRUCTION IN FRONT OF SOMERVILLE DPW BUILDING: 6.1. INSTALL DRILLED SHAFT FOUNDATIONS AND THEN WALL PILES. 6.2. INSTALL TEMPORARY WALL BRACING TO SUPPORT REQUIRED EXCAVATION FOR DRAINAGE PIPES IN FRONT OF WALL. ONCE THIS EXCAVATION HAS BEEN SUITABLY BACKFILLED, TEMPORARY WALL BRACING WILL BE REMOVED. NOTES: 41' MAX 9,350 SF EXHIBIT D - CONCEPTUAL DRAWINGS OF ENCHROACHMENT OF DPW FACILITY ON MBTA ROW SHEET 3 OF 5

30 30 40 32 32 34 34 36 36 38 38 42 D D D D 320+00.00 320+00.00 176+00.00 177+00.00 J NOISE BARRIER N-11 NIP (DP 16) 4" HDPE UNDERDRAIN INVERT=37.2 TEST PIT EXISTING WATER MAIN. IF THERE IS A CONFLICT WITH PROPOSED WALL, CUT AND CAP MAIN BEHIND WALL. REMOVE EXISTING 18" PVC AND MANHOLE 4" HDPE UNDERDRAIN TEMP ROW EASEMENT ROW END RETAINING WALL ME-2 MB-EB 320+62.75 OFFSET 40.19 N: 2969985.64 E: 761865.74 OCS FOUNDATION TYP NIP (DP 54) RETAINING WALL ME-2 DRAINAGE NIP (DP 11) DRAINAGE NIP (DP 11) ROW FOR DRAINAGE OUTLET TO DPW BUILDING, SEE SHEET RWS-U-2001 PROPOSED C NH-T1 L PROPOSED C NH-T2 L PROPOSED C MB-EB L PROPOSED C MB-WB L 9.83' SOLDIER PILE IN DRILLED SHAFT TYP 3.74' 8'-0" TYP 2.13' BEGIN NOISE BARRIER N-11 MOUNTED ATOP RETAINING WALL ME-2 MB-EB STA 320+18.48 N: 2969947.09 E: 761887.49 2.50' KINK POINT MB-EB 320+10.48 OFFSET 39.69 N: 2969940.12 E: 761894.42 9.33' 2.02' SOMERVILLE DEPARTMENT OF PUBLIC WORKS BUILDING SEE NOTE 5 PERMANENT GROUND ANCHOR SPL RETAINING WALL ME-2 PLAN ISSUE DATE DESCRIPTION BY CHK'D APP. SCALE: DATE: DRAWN BY DESIGN BY CHECK BY ISSUE SHEET: PLAN NO.: MBTA CONTRACT NO. E22CN07 CAMBRIDGE / SOMERVILLE / MEDFORD, MASSACHUSETTS MASSACHUSETTS BAY TRANSPORTATION AUTHORITY GREEN LINE EXTENSION PROJECT PLOTTED: 01/11/19 4:25PM BY:PFEIFECM DRAWING: I:\PROJECTS\4019139\4019139_0001\90_CAD MODELS AND SHEETS\18B RET & NOISE WALL MB_SEG 4\06_S_STRUCTURAL\SHEETS\RWS-S-2015.DWG [RWS-S-2015] 01/11/19 4:18PM PRE-RELEASE FOR CONSTRUCTION DESIGN PACKAGE: 18B (RWS) WALL ME-2 PLAN SHEET 5 OF 5   RWS-S-2015   CMP ARG ARG 12/19/18 AS NOTED                                                 NOT AUTHORIZED FOR CONSTRUCTION MATCHLINE - SEE SHEET RWS-S-2014 FOR CONTINUATION A S-4001 B S-4001 6 S-8012 0 10' 5' 10' 1. SEE SHEETS RWS-G-0501, RWS-S-1001, AND RWS-S-1002 FOR GENERAL NOTES. 2. SEE SHEET RWS-S-3011 FOR RETAINING WALL ELEVATION. 3. SEE SHEET RWS-S-4001 FOR RETAINING WALL TYPICAL SECTIONS. 4. SEE SHEETS RWS-S-8001 AND RWS-S-8002 FOR RETAINING WALL DETAILS. 5. A 1.4 KSF FOUNDATION SURCHARGE LOADING AND A 250 PSF GROUND FLOOR LIVE LOAD SURCHARGE LOADING WAS USED IN THE DESIGN OF THIS WALL TO ACCOUNT FOR THE SOMERVILLE DPW BUILDING WITHIN THE WALL'S ZONE OF INFLUENCE. 6. FOR RETAINING WALL ME-2, DRAINAGE TO BE PROVIDED AFTER RETAINING WALL CONSTRUCTION WITHOUT THE USE OF TEMPORARY EXCAVATION SUPPORT. 7. SPL RETAINING WALL ME-2 SEQUENCE OF CONSTRUCTION IN FRONT OF SOMERVILLE DPW BUILDING: 7.1. INSTALL DRILLED SHAFT FOUNDATIONS AND THEN WALL PILES. 7.2. INSTALL TEMPORARY WALL BRACING TO SUPPORT REQUIRED EXCAVATION FOR DRAINAGE PIPES IN FRONT OF WALL. ONCE THIS EXCAVATION HAS BEEN SUITABLY BACKFILLED, TEMPORARY WALL BRACING WILL BE REMOVED. 8. SEQUENCE OF CONSTRUCTION FOR SEGMENTS OF WALL NOT IN FRONT OF DPW BUILDING SIMILAR, BUT NO TEMPORARY WALL BRACING IS REQUIRED DURING INSTALLATION OF DRAINAGE IN FRONT OF WALL. NOTES: 45'-0" MAX TYP 41' MAX 3,600 SF EXHIBIT D - CONCEPTUAL DRAWINGS OF ENCHROACHMENT OF DPW FACILITY ON MBTA ROW SHEET 4 OF 5

TEMP ROW EASEMENT ROW SOMERVILLE DPW BUILDING EDGE OF FOOTING SOMERVILLE DPW BUILDING ISSUE DATE DESCRIPTION BY CHK'D APP. SCALE: DATE: DRAWN BY DESIGN BY CHECK BY ISSUE SHEET: PLAN NO.: MBTA CONTRACT NO. E22CN07 CAMBRIDGE / SOMERVILLE / MEDFORD, MASSACHUSETTS MASSACHUSETTS BAY TRANSPORTATION AUTHORITY GREEN LINE EXTENSION PROJECT PLOTTED: 10/11/18 2:49PM BY:PFEIFECM DRAWING: I:\PROJECTS\4019139\4019139_0001\90_CAD MODELS AND SHEETS\18 RET & NOISE WALL MB_SEG 4\06_S_STRUCTURAL\WORKING\RWS-S-2144_FOOTING ROW.DWG [RWS-S-2144] 10/11/18 2:12PM INTERMEDIATE DESIGN PACKAGE: 18 (RWS) SOMERVILLE DPW BLDG PLAN MB-EB STA 317+00   XXXXXX   CMP ARG ARG 10/01/18 AS NOTED                                                 NOT AUTHORIZED FOR CONSTRUCTION 1. FOR TYPICAL SECTION AT THIS LOCATION SHOWING LIMITS OF TIEBACK BEYOND THE RIGHT-OF-WAY, SEE ATTACHED CROSS SECTION FROM MB-EB STA 317+00. 2. PLAN VIEW SHOWN AT LOCATION WHERE TRANSITION OF DPW BULDING FOOTING DEPTH WAS ENCOUNTERED. NOTES: SOMERVILLE DPW BUILDING / RIGHT-OF-WAY PLAN 0 1"=10' 10' 5' 10' SOMERVILLE DPW FOOTING ENCROACHMENT ONTO MBTA ROW VARIES FROM 2 1/2" TO 10 7/8" FOR 600' EXHIBIT D - CONCEPTUAL DRAWINGS OF ENCHROACHMENT OF DPW FACILITY ON MBTA ROW SHEET 5 OF 5