PUBLIC NOTICE. 696 Virginia Road Concord, MA

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1 Virginia Road Concord, MA PUBLC NOTCE Comment Period Begins: February 6, 26 Comment Period Ends: March, 26 File Number: NAE n Reply Refer To: Kevin R. Kotelly, P.E. Phone: (978) kevin.r.kotelly@usace.army.mil The District Engineer has received a permit application to conduct work in waters of the United States from the City of Boston Public Works Department, One City Hall Plaza, Room 7, Boston, Massachusetts This work is proposed at the Northern Avenue Bridge in the Fort Point Channel of Boston Harbor at Northern Avenue, Boston, Massachusetts and on the Chelsea River at 338 East Eagle Street, East Boston, Massachusetts. The work involves work, structures, and fill below the high tide line of waters of the United States at two separate sites in Boston, Massachusetts as follows: Northern Avenue Bridge Site (Coordinates are: Latitude N , Longitude W ) The existing Northern Avenue Bridge is proposed to be removed. The City of Boston proposes to remove the bridge superstructure in sections and float the sections intact via barge to a City of Boston owned property in East Boston. Approximately 4 piles will be placed to anchor a proposed floating fender system which will surround the work area. The work also includes the removal of an existing submarine cable from the channel bed in Fort Point Channel. The excavation of the cable would impact approximately 72 square feet (SF) of the channel bottom and require the removal of approximately 96 cubic feet of material. East Boston Site (Coordinates are: Latitude N , Longitude W ) The removed bridge sections would be floated intact to a City owned storage yard at 338 East Eagle Street, East Boston, Massachusetts, on the Chelsea River. A temporary ramp and trestle system is proposed to be constructed in the Chelsea River to offload the bridge at the storage yard. The Trestle would be 8 feet (ft) wide by ft long and supported by approximately 36, 24 inch diameter pipe piles. Some of the piles would be batter piles. The ramp would be 8 ft wide by 85 ft long. The ramp and trestle would be constructed of steel beams and plates with timber matting at the surface. Temporary impacts to 69,698 SF of mud flats associated with the installation of the ramp and trestle are proposed. Pile driving and the use of barges, anchors, and other equipment in the intertidal area during construction of the trestle system would contribute to the temporary impacts. The work is shown on the attached plans entitled, Capital mprovement Project 6-93, Bridge B-6-84 (38K), Northern Avenue Over Fort Point Channel, Northern Avenue Bridge Construction Phase, on 4 sheets, and dated February, 26. The project has been designed to avoid and minimize impacts. mpacts to waters of the US would be temporary. Mitigation for unavoidable impacts is being considered as part of this public notice.

2 CENAE-R FLE NO. NAE AUTHORTY Permits are required pursuant to: _X _ Section of the Rivers and Harbors Act of 899 _X _ Section 44 of the Clean Water Act Section 3 of the Marine Protection, Research and Sanctuaries Act. The decision whether to issue a permit will be based on an evaluation of the probable impact of the proposed activity on the public interest. That decision will reflect the national concern for both protection and utilization of important resources. The benefit which may reasonably accrue from the proposal must be balanced against its reasonably foreseeable detriments. All factors which may be relevant to the proposal will be considered, including the cumulative effects thereof; among those are: conservation, economics, aesthetics, general environmental concerns, wetlands, cultural value, fish and wildlife values, flood hazards, flood plain value, land use, navigation, shoreline erosion and accretion, recreation, water supply and conservation, water quality, energy needs, safety, food production and, in general, the needs and welfare of the people. The Corps of Engineers is soliciting comments from the public; Federal, state, and local agencies and officials; ndian Tribes; and other interested parties in order to consider and evaluate the impacts of this proposed activity. Any comments received will be considered by the Corps of Engineers to determine whether to issue, modify, condition or deny a permit for this proposal. To make this decision, comments are used to assess impacts on endangered species, historic properties, water quality, general environmental effects, and the other public interest factors listed above. Comments are used in the preparation of an Environmental Assessment andor an Environmental mpact Statement pursuant to the National Environmental Policy Act. Comments are also used to determine the need for a public hearing and to determine the overall public interest of the proposed activity. Where the activity involves the discharge of dredged or fill material into waters of the United States or the transportation of dredged material for the purpose of disposing it in ocean waters, the evaluation of the impact of the activity in the public interest will also include application of the guidelines promulgated by the Administrator, U.S Environmental Protection Agency, under authority of Section 44(b) of the Clean Water Act, andor Section 3 of the Marine Protection Research and Sanctuaries Act of 972, as amended. ESSENTAL FSH HABTAT The Magnuson-Stevens Fishery Conservation and Management Act, as amended by the Sustainable Fisheries Act of 996 (Public Law 4-267), requires all federal agencies to consult with the National Marine Fisheries Service on all actions, or proposed actions, permitted, funded, or undertaken by the agency, that may adversely affect Essential Fish Habitat (EFH). This project would impact approximately.6 acres of Essential Fish Habitat (EFH) for various life stages of Atlantic cod (Gadus morhua), haddock (Melanogrammus aeglefinus), pollock (Pollachius virens), whiting (Merluccius bilinearis), red hake (Urophycis chuss), white hake (Urophycis tenuis), winter flounder (Pseudopleuronectes americanus), yellowtail flounder (Limanda ferruginea), windowpane flounder (Scophthalmus aquosus), American plaice (Hippoglossoides platessoides), ocean pout (Macrozoarces americanus), Atlantic halibut (Hippoglossus hippoglossus), Atlantic sea scallop (Placopecten magellanicus), Atlantic sea herring (Clupea harengus), bluefish (Pomatomus saltatrix), long finned squid (Loligo pealeii), short finned squid (llex illecebrosus), Atlantic butterfish (Peprilus triacanthus), Atlantic mackerel (Scomber scombrus), summer flounder (Paralichthys dentatus), scup (Stenotomus chrysops), black sea bass (Centropristis 2

3 CENAE-R FLE NO. NAE striata), surf clam (Spisula solidissima), and bluefin tuna (Thunnus thynnus). This habitat consists of subtidal silt and sand and mudflat. Loss of this habitat may adversely affect the species listed above. However, the District Engineer has made a preliminary determination that the site-specific adverse effect will not be substantial. Further consultation with the National Marine Fisheries Service regarding EFH conservation recommendations is being conducted and will be concluded prior to the final decision. NATONAL HSTORC PRESERVATON ACT Based on his initial review, the District Engineer has determined that the proposed work may have an adverse effect on properties listed in, or eligible for listing in, the National Register of Historic Places, specifically, the Northern Avenue Bridge. Additional review and consultation to fulfil requirements under Section 6 of the National Historic Preservation Act of 966, as amended, will be ongoing as part of the permit review process. ENDANGERED SPECES CONSULTATON The New England District, Army Corps of Engineers has reviewed the list of species protected under the Endangered Species Act of 973, as amended, which might occur at the project site. t is our preliminary determination that the proposed activity for which authorization is being sought is designed, situated or will be operatedused in such a manner that it is not likely to adversely affect any Federally listed endangered or threatened species or their designated critical habitat. By this Public Notice, we are requesting that the appropriate Federal Agency concur with our determination. COASTAL ZONE MANAGEMENT The States of Connecticut, Maine, Massachusetts, New Hampshire and Rhode sland have approved Coastal Zone Management Programs. Where applicable, the applicant states that any proposed activity will comply with and will be conducted in a manner that is consistent with the approved Coastal Zone Management Program. By this Public Notice, we are requesting the State concurrence or objection to the applicant s consistency statement. The following authorizations have been applied for, or have been, or will be obtained: (X) Permit, License or Assent from State. (X) Permit from Local Wetland Agency or Conservation Commission. (X) Water Quality Certification in accordance with Section 4 of the Clean Water Act. n order to properly evaluate the proposal, we are seeking public comment. Anyone wishing to comment is encouraged to do so. Comments should be submitted in writing by the above date. f you have any questions, please contact Kevin Kotelly at (978) , (8) or (8) , if calling from within Massachusetts. Any person may request, in writing, within the comment period specified in this notice, that a public hearing be held to consider the application. Requests for a public hearing shall specifically state the reasons for holding a public hearing. The Corps holds public hearings for the purpose of obtaining public comments when that is the best means for understanding a wide variety of concerns from a diverse segment of the public. The initial determinations made herein will be reviewed in light of facts submitted in response to this notice. All comments will be considered a matter of public record. Copies of letters of objection will be forwarded to the applicant who will normally be requested to contact objectors directly in an effort to reach an understanding. 3

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7 CTY OF BOSTON PUBLC WORKS DEPARTMENT HON. MARTN J. WALSH - MAYOR MCHAEL D. DENNEHY - COMMSSONER OF PUBLC WORKS CAPTAL MPROVEMENT PROJECT 6-93 BRDGE B-6-84 (38K) NORTHERN AVENUE OVER FORT PONT CHANNEL NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE p BOSTON HARBOR NORTHERN AVENUE BRDGE el,4, ;;;:: "24:' 4:.4-' - :7. 4 EAST BOSTON BRDGE LOCATON PLAN STORAGE YARD LOCATON PLAN PLANS PREPARED BY: R 352 ARCH STREET, SUTE 3, BOSTON, MA 2 APPROVED: DATE: FEB 26 P.S.&E. SUBMSSON COM SSu R PUBLC WORKS

8 GENERAL NOTES NDEX OF DRAWNGS. THE BOSTON PUBLC WORKS DEPARTMENT MAKES NO ASSURANCES REGARDNG THE PRESENTED CONDTONS, DMENSONS AND MATERAL OF THE EXSTNG STRUCTURES. THE CONTRACTOR SHALL DETERMNE AND VERFY EXSTNG CONDMONS AND CONSTRUCTON FEATURES OF THE STRUCTURES AS NECESSARY FOR PLANNNG AND COMPLETON OF THE WORK. 2. THE CONTRACTOR SHALL VST THE PROJECT STES PROR TO BDDNG TO FAMLARZE HMSELF WTH THE STE CONDTONS AND THE EXTENT AND NATURE OF THE WORK TO BE PERFORMED UNDER THS CONTRACT. THE SWNG PER, SWNG SPAN AND TENDER'S HOUSE CAN ONLY BE ACCESSED BY BOAT N COORDNATON WTH CRY PERSONNEL 3. THE CONTRACTOR SHALL VERFY ALL DMENSONS REQURED FOR THE PROPER PERFORMANCE OF THE WORK. FELD CONDTONS MAY EXST WHCH DEVATE FROM THE TYPCAL AND THEORETCAL DMENSONS SHOWN ON THE PLANS, N CONDTON REPORTS, AND FELD NSPECTON NOTES. 4. EXSTNG BRDGE PLANS, CONDTON REPORTS, FELD NSPECTON NOTES AND CALCULATONS ARE PROVDED FOR NFORMATONAL PURPOSES ONLY AND ARE NOT TO BE ASSUMED TO BE ACCURATE OR COMPLETE. THE CONTRACTOR SHALL DETERMNE THE AS-BULT AND CURRENT CONDMON OF THE BRDGE. ALL CALCULATONS REQURED TO PERFORM CONTRACT WORK N A SAFE AND EFFECTVE MANNER SHALL BE PREPARED AND STAMPED BY A PROFESSONAL ENGNEER REGSTERED N THE STATE OF MASSACHUSETTS N THE EMPLOY OF THE CONTRACTOR. 5. DMENSONS, ANGLES, AND ELEVATONS SHOWN ON THE EXSTNG DETALS ARE TAKEN FROM EXSTNG BRDGE PLANS SUPPLEMENTED BY LMTED FELD MEASUREMENTS AND ARE NOT GUARANTEED. THE CONTRACTOR SHALL DETERMNE AND ESTABLSH ALL DMENSONS, ANGLES, ELEVATONS, AND EXSTNG DETALS NECESSARY FOR THE COMPLETON OF ALL WORK. THE CONTRACTOR SHALL BE RESPONSBLE FOR THE ADEQUACY AND ACCURACY THEREOF AND SHALL NOT COMMENCE ANY WORK UNTL THE REQURED MEASUREMENTS ON THE ACTUAL STRUCTURE HAVE BEEN MADE. 6. SOME OF THE EXSTNG STRUCTURAL ELEMENTS ARE N ADVANCED STAGES OF DETERORATON. LOCAL FALURES ARE POSSBLE. THE CONTRACTOR S SOLELY RESPONSBLE FOR ASSESSNG THE CONDTON OF THE STRUCTURE AND ENSURNG THE SAFETY AND STABLTY OF THE EXSTNG ELEMENTS DURNG AND THROUGH ALL THE STAGES OF REMOVAL AND DSPOSAL OR REMOVAL AND RELOCATON. AS APPLCABLE. 7. CONTRACTOR SHALL BE SOLELY RESPONSBLE FOR ANALYZNG AND ASSESSNG THE SAFETY AND STABLTY OF THE EXSTNG BRDGE STRUCTURE FOR SUTABUTY OF CONTRACTORS OWN SEQUENCE AND MEANS AND METHODS OF BRDGE REMOVAL. DUE CONSDERATON SHALL BE GVEN TO EQUPMENT, MATERAL AND PERSONNEL TO BE PLACED ON THE EXSTNG STRUCTURE DURNG 'THE DEMOUTON PROCESS. 8. THE CONTRACTOR SHALL SUBMT TO THE ENGNEER AND MASSACHUSETTS DEP THE PROPOSED METHOD OF WORK, SCHEDULE AND DENTFCATON OF EQUPMENT TO BE USED FOR ALL TEMS OF WORK AT LEAST ONE WEEK PROR TO THE START OF CONSTRUCTON. THE FNAL STORAGE ARRANGEMENT OF MATERALS AND BRDGE SECTONS AT THE EAST BOSTON STORAGE YARD SHALL BE ALSO SUBMTTED TO THE ENGNEER FOR APPROVAL 9. AT LEAST ONE WEEK PROR TO THE START OF THE CONSTRUCTON, THE CONTRACTOR SHALL SUBMT DETALED PLANS AND PROCEDURES (WTH SUPPORTNG WORKNG DRAWNGS, CALCULATONS, BARGE ANALYSS, DEMOUTON METHODS, EQUPMENT, CREW SZES, SEQUENCE, DURATONS. ETC.) FOR THE FXED SPANS, SWNG SPAN, AND TENDER'S HOUSE TO THE ENGNEER FOR REVEW AND APPROVAL N ADDTON, TEMPORARY SUPPORTS, TEMPORARY SHELDNG, OR ANY REQURED SHORNG SHALL HAVE SHOP AND WORKNG DRAWNGS PREPARED AND SUBMTTED TO THE ENGNEER FOR REVEW AND APPROVAL AN ANALYSS OF THE STAGNG BARGE AT THE PONTS WHERE THE BRDGE SPANS ARE SUPPORTED ON THE DECK S ALSO REQURED FOR REVEW AND APPROVAL BY THE ENGNEER. ALL SUBMTTALS SHALL BE PREPARED AND STAMPED BY A PROFESSONAL ENGNEER REGSTERED N THE COMMONWEALTH OF MASSACHUSETTS N THE EMPLOY OF THE CONTRACTOR. THE CONTRACTOR SHALL NOT COMMENCE ANY WORK UNTL THE APPLCABLE SUBMTTALS ARE APPROVED BY THE ENGNEER.. WORKNG DRAWNGS SHALL STATE THAT DMENSONS HAVE BEEN FELD VERFED BY THE CONTRACTOR. DRAWNGS SUBMTTED WTHOUT THS STATEMENT WLL NOT BE REVEWED OR APPROVED. DMENSONS SHALL NOT BE SCALED FROM THE DRAWNGS. SCALES NOTED ON THE PLANS ARE NOT APPLCABLE TO REDUCED SZED PRNTS. DVDE SCALES BY 2 FOR HALF-SZE PRNTS.. DETERMNATON OF OBSTRUCTONS REQURNG REMOVAL WTHN THE CHANNEL ABOVE THE MUDUNE SHALL BE COMPLETED USNG AVALABLE METHODS AND MAY NCLUDE BUT NOT LMTED TO: VSUAL NSPECTON AT LOW TDE, DVER NSPECTON, OR SDE SCAN SONAR. 2. CONTRACTOR SHALL RETREVE THE SPAN LOWER CHORD MEMBER LL2 OF THE SOUTH EXTEROR FXED TRUSS THAT HAS FALLEN NTO THE CHANNEL. 3. THE CONTRACTOR SHALL OBTAN ALL REQURED PERMTS AND LCENSES FOR THE MANAGEMENT OF LEAD, ASBESTOS AND ANY OTHER HAZARDOUS MATERAL AND PAY ALL CHARGES AND FEES NCURRED. 4. FOR THE PERMTS ACQURED BY THE cny, THE CONTRACTOR SHALL BE RESPONSBLE FOR ANY ASSOCATED DELAYS AND COSTS DUE TO CHANGES REQURED TO THESE PERMTS. 5. THE CONTRACTOR SHALL GVE ALL NOTCES NECESSARY AND NCDENTAL TO THE DUE AND LAWFUL PROSECUTON OF THE WORK, AND SHALL COMPLY WTH ALL LAWS, ORDNANCES, RULES AND REGULATONS OF THE FEDERAL GOVERNMENT, THE STATE, THE CRY OF BOSTON AND OTHERS HAVNG JURSDCTON OVER THE WORK AND ENCOMPASSED BY THE CONTRACT. 6. THE CONTRACTOR'S ATTENTON S DRECTED TO THE FACT THAT THE BRDGE CROSSES NAVGABLE WATERS. T SHALL BE THE SOLE RESPONSBLTY OF THE CONTRACTOR TO CONDUCT OPERATONS AS TO COMPLY WTH ALL THE REGULATONS AND REQUREMENTS OF THE U.S. COAST GUARD, THE CORPS OF ENGNEERS, AND THE MASSACHUSETTS DEPARTMENT OF ENVRONMENTAL PROTECTON. 7. THE USE OF BARGES, FALSEWORK, FORMWORK, RGGNG, SCAFFOLDNG AS WELL AS OTHER CONSTRUCTON METHODS AND PROCEDURES SHALL BE SCHEDULED AND PERFORMED N SUCH A WAY THAT T SHALL NOT NTERFERE WTH OR CAUSE UNAUTHORZED NTERRUPTONS TO NAVGATON. THE EXTENT AND LMTS OF ENCROACHMENT, F ANY, ON THE NAVGATON CLEARANCES SHALL BE SUBMTTED TO THE USCG FOR APPROVAL. NO ENCROACHMENT SHALL BE CAUSED UNTL WRTTEN AUTHORZATON S RECEVED FROM THE USCG. 8. BEFORE COMMENCEMENT OF ANY WORK, THE CONTRACTOR SHALL LOCATE ANY UTLTES N THE WORK AREAS AND PERFORM STE SURVEYS TO THE LEVEL OF DETAL NECESSARY TO DENTFY AND PROTECT THE UTLMES. 9. EXSTNG ELECTRC SERVCE ON THE BRDGE S TO BE SHUT OFF, CUT AND CAPPED, PROR TO ANY BRDGE REMOVAL ACTVTES. 2. THE CONTRACTOR SHALL BE RESPONSBLE FOR ENSURNG THAT NO DAMAGE OCCURS TO EXSTNG UTLTES WTHN THE VCNTY OF THE PROJECT AS A RESULT OF THE WORK. THE CONTRACTOR SHALL CONTACT DGSAFE (8) A MNMUM OF 72 HOURS PROR TO THE START OF ANY CONSTRUCTON ACTVTES. 2. EXSTNG SUBMARNE CABLES SHALL BE REMOVED. 22. THE CONTRACTOR SHALL CONDUCT CONSTRUCTON OPERATONS N ORDER TO PRECLUDE THE NTERRUPTON OF MARNE ADS TO NAVGATON LOCATED ON THE BRDGE OR APPURTENANCES OF THE BRDGE: F OPERATONS REQURE NTERRUPTON OF EXSTNG ADS, PROVDE TEMPORARY ADS OF POWER AS REQURED FOR THE DURATON OF THE NTERRUPTON N ORDER TO MANTAN THE MARNE ADS TO NAVGATON N ACCORDANCE WTH U.S. COAST GUARD REGULATONS. 23. ALL CONSTRUCTON EQUPMENT MUST BE MARKED N ACCORDANCE WTH U.S. COAST GUARD REGULATONS WHEN NOT ENGAGED N CONSTRUCTON ACTATES. THE CONTRACTOR'S SUBMTTED PLAN AND SCHEDULE SHALL SHOW THE PROPOSED LOCATON TO MOOR HS CONSTRUCTON VESSELS WHEN THEY ARE NOT ENGAGED N CONSTRUCTON ACTVTES. 24. THE U.S. COAST GUARD, CTY OF BOSTON, MASSACHUSETTS DEPARTMENT OF ENVRONMENTAL PROTECTON, ENVRONMENTAL PROTECTON AGENCY, AND THE MASSACHUSETTS STATE POLCE HAVE THE RGHT TO CLEAR THE CHANNEL FOR EMERGENCES. 25. THE CONTRACTOR SHALL NOT MPACT THE NAVGATON CHANNEL AND ANY CLOSURES ASSOCATED WTH THE REMOVAL OR DEMOLTON OPERATONS SHALL BE COORDNATED AND APPROVED BY THE USCG. 26. PROR TO MOBUZATON, THE CONTRACTOR S REQURED TO CONTACT THE MARNE SAFETY OFFCER AT THE ADDRESS BELOW AND PROVDE THE OFFCER A SCHEDULE OF HS CONSTRUCTON ACTVTES WHCH WOULD MPACT MARNE TRAFFC. U.S. COAST GUARD 48 ATLANTC AVENUE BOSTON, MA THE CONTRACTOR SHALL SUBMT TO THE ENGNEER FOR APPROVAL THE PLAN AND SCHEDULE OF ALL WORK THAT WLL RESTRCT THE NAVGATONAL CHANNEL TO MARNE TRAFFC. THE CONTRACTOR SHALL NOTFY THE U.S. COAST GUARD (BOSTON) N WRTNG AS PER CONTRACT REQUREMENTS. ALL REQUESTS ARE TO BE REVEWED AND APPROVED BY THE ENGNEER PROR TO COAST GUARD SUBMTTAL. THS SHALL NCLUDE TEMPORARY NAVGATON LGHTNG ON CONTRACTOR EQUPMENT AS REQURED N ACCORDANCE WTH U.S. COAST GUARD REGULATONS. 28. THE CONTRACTOR SHALL TAKE ADEQUATE PRECAUTONS AGANST THE WAKE CURRENT PRODUCED BY NEARBY VESSELS ON HS EQUPMENT AND SHALL NOT BE ENTTLED TO ANY TME DELAYS OR EXTRA MONES DUE TO ANY DAMAGE CAUSED BY SUCH PASSNG MARNE TRAFFC. 29. THE CONTRACTOR S ADVSED THAT THERE S VESSEL TRAFFC N CLOSE PROXMTY OF THE BRDGE SERVNG THE ADJACENT FACLTES (ROWE'S WHARF, MARNA NEXT TO BARKNG CRAB RESTAURANT, NOM TDE STATON, JAMES HOOK & CO., WATER SHUTTLE, ETC.). THE CONTRACTOR SHALL PERFORM THE WORK UNDER THS CONTRACT SO AS TO MNMZE NTERFERENCE WTH NAVGATON. 3. THE CONTRACTOR SHALL BE RESPONSBLE FOR PROPER DSPOSAL OF ALL EXSTNG MATERALS WHCH ARE TO BE REMOVED AND DSPOSED OF FROM THE STRUCTURE AS SHOWN ON THE PLANS. THE BD PRCE SHALL NCLUDE THE COMPLETE COST OF REMOVAL, HANDLNG AND LEGAL DSPOSAL OF SUCH MATERALS. THE CHANNEL S TO REMAN CLEAR OF DEBRS AND MATERALS. 3. NO PART OF THE EXSTNG SUPERSTRUCTURE ELEMENTS SHALL BE ALLOWED TO FALL NTO THE WATER DURNG THE PROCESS OF REMOVAL. 32. THE EXSTNG BRDGE S COATED WTH A LEAD-BASED PANT. LEAD S A HAZARDOUS MATERAL. REFER TO THE SPECAL PROVSONS FOR A DESCRPTON OF THE LEAD PANT REMOVAL, CONTANMENT AND DSPOSAL REQUREMENTS AS WELL AS THE WORKER HEALTH AND SAFETY CONTROLS, AND REQURED REGULATORY AGENCY FLNGS AND APPROVALS. 33. N ADDTON TO THE REQUREMENTS FOR CONTANMENT OF LEAD-CONTAMNATED DEBRS DESCRBED N THE SPECAL PROVSONS. THE CONTRACTOR SHALL AT NO TME DROP WASTE, STEEL, DEBRS OR OTHER MATERAL TO THE AREAS BELOW THE BRDGE. PLATFORMS, NETS, SCREENS OR OTHER PROTECTVE DEVCES SHALL BE USED TO CATCH ALL SUCH MATERAL. F THE ENGNEER DETERMNES THAT ADEQUATE PROTECTVE DEVCES ARE NOT BENG EMPLOYED, THE WORK SHALL BE SUSPENDED UNTL ADEQUATE PROTECTON S PROVDED WTHOUT ADDTONAL COMPENSATON. 34. CONTRACTOR SHALL PROVDE PERMANENT VEHCLE BARRERS (MASSDOT TEM E 43.4.) AND PERMANENT CHAN LNK FENCNG (MASSDOT TEM 644 E 44..), 8' HGH WTH ANT-CLMBNG TOP DETALS ON BOTH SDES OF THE BRDGE APPROACHES TO PREVENT ACCDENTAL OR UNAUTHORZED ENTRY. FNAL CONDTON SAFETY MEASURES ARE TO BE N PLACE PROR TO REMOVAL OF TEMPORARY SAFETY BARRERS AND FENCNG. 35. ELEVATONS ARE BASED ON THE NORTH AMERCAN VERTCAL DATUM (NAVD) OF THE CONTRACTOR S NOT PERMTTED TO STOCKPLE ANY MATERALS REMOVED FROM THE BRDGE OVERNGHT ON THE CONTRACTOR STAGNG AREAS ALONG NORTHERN AVENUE. SURVEY BY NONE DRAWN BY CCJ SHEET NO. TTLE. TTLE SHEET 2. GENERAL NOTES & NDEX OF DRAWNGS 3. GENERAL PLAN AND ELEVATON 4. SUGGESTED CONSTRUCTON SEQUENCE OF 2 5. SUGGESTED CONSTRUCTON SEQUENCE 2 OF 2 6. TENDER'S HOUSE REMOVAL 7. SWNG SPAN REMOVAL & RELOCATON 8. APPROACH TRUSS SPANS & 2 REMOVAL & RELOCATON 9. SWNG PER FENDER SYSTEM REMOVAL. PLAN OF FLOATNG BARRER SYSTEM. ELEVATON AND DETALS OF FLOATNG BARRER SYSTEM 2. PERMANENT BARRER LOCATON PLAN 3. STORAGE YARD LAYOUT 4. TEMPORARY TRESTLE DETALS CP 6-93 SHEET 2 OF 4 CTY OF BOSTON PUBUC WORKS DEPARTMENT ENGNEERNG DVSON NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE GENERAL NOTES & NDEX OF DRAWNGS CHECKED BY FOP SCALE: AS NOTED DATE: FEB 26 CTY ENGNEER

9 _ G3 PLAN & ELEVAT O N.dwg, Plotted: Fob 5, 26 5om e 4 tb945 Bridge Bridge Demolition 579'-Ort SPAN - 48'-9r± 4'-3"± q SWNG PER 4'-3± SPAN 2-47'-94 ± FACE OF BACKWALL -ELECTRC CONDUT q PER (SEE NOTE 6) 8 g ' r X F x f- x - f,; SWNG SPAN (SEE NOTE 4) c.. PER K- X T x -T x 3 MEAN SEA LEVEL SPAN FL EL--,3_4± =.,.., j h L X q PER 3 ROWE'S WHARF ELECTRCAL CONDUT (SEE NOTE 6) mo vvnarv,--- ;247 -.,.29 (s, '' M.t.,..". - r,(, -.-A4.4: e A 23 5' - ± : NAVGATON CHANNEL SPAN 2 SPAN f: BOSTON APPROX. MUDLNE i LMTS OF EXSTNG MEAN LOW WATER LMTS OF 4E)......_-' o ABUTMENT (SEE NOTE SUBMARNE CABLE FENDER (TYP.) EL. -5.6± SOUTH BOSTON FENDER 4 i... v.'.3.. a' (SEE NOTE 6) ABUTMENT Pie - MEAN HGH WATER P.: z"""' - --"'' EL. 4.33± LONGTUDNAL SECTON THROUGH CENTERLNE OF BRDGE,... $.. " _, -' 's., SCALE: 32 =.-"...ri' ',... "tt ---" '44 * UMTS OF EXSTNG TENDER HOUSE (TO BE REMOVED) SWNG SPAN N OPEN POSTON (TO BE REMOVED AND RELOCATED) r-.---i "--:-...7 " ' r:._d_.. -; ". ' " - L._ ' _ ' i '... L. L..8 C. :i El - ' ----' _',4-4 r SWNG BRDGE '''''' 7--: -:--;. HoR cci.l776 FT... NAllr, Am, v ERT 7 F APPROXMATE LMTS OF NAVGATON 7 CHANNEL (SEE NOTE 2) 44 5 : TEMPORARY FLOATNG BARRER SYSTEM WTH ' A q, PLES (TO REMAN) N 4 4 V 4 n V ==j b C47 o 2 i6,,--i if ' 8> ; 9' i",,bstr) ,,......, is b Piles _ Piles " Cable Area?--- ti-.6 FXED BRDGE HoRa 75 FT verta.. 6 FT Nal Su m?rye ruqs.-. NOAA NAUTCAL NAVGATONAL CHART A APPROXMATE LMTS "BOSTON NNER HARBOR" OF NAVGATON REMANS OF EXSTNG i ; LAST UPDATE 2824 CHANNEL (SEE NOTE 2) FENDER PLES AT PER SDEWALK SCALE: " = 2'-" :7 : NOTES: TO REMAN OPEN (TO REMAN)_ El SPAN 3. FOR GENERAL NOTES AND SUGGESTED CONSTRUCTON SEQUENCE, REFER TO SHEETS 2, 4 SEE NOTE 8 N ELECTRCAL CONDUT (TO REMAN) AND 5. i 3 P cc o $ (SEE NOTE 6) 3C-" 2. APPROXMATE UMTS SHOWN OF THE NAVGATON CHANNEL ARE BASED ON NOAA NAUTCAL N NAVGATONAL CHART. : 3. CONTRACTOR S ADVSED THAT THERE S A CABLE AREA NDCATED ON THE NOM NAUTCAL 7.- '. CONTRACTOR NAVGATONAL CHART, fl "- -J z STAGNG ' PER 2 (TO REMAN) G N G 4. NNTT LO Gl ToU L S ECT O N THE SWNG SP S SHOWN N T H ( T ir. A, ( T y p. ) NAVGATON) p oa N F SCHEMATC LLUSTRATON PURPOSES ONLY. YCOTLOTORHS THE SWNGSPANS NONGO S SPAN (TO BE REMOVED Q BRDGE -: () OP N POSTON OARS N GENERAL R A PLAN. HE CO N ii. vl B E HHEE SHOWN NOT *:j PERMED TO ROTATE THE SWNG SPAN. AND RELOCATED) LMTS OF SWNG, m _ PER (TO REMAN) {. REFER TO HYDROGRAPHC SURVEY N APPENDX A OF CONTRACT DOCUMENTS. SPAN 2 (TO BE REMOVED 6. EXSTNG ELECTRC CONDUTS FROM THE DECK OF SPANS AND 2 AND THE SUBMARNE A AND RELOCATED) CABLE ON THE CHANNEL BED BETWEEN PER AND THE SWNG PER SHALL BE z ' " DE-ENERGZED AND REMOVED. i C-) FLOATNG BARRER 7. THS SHEET S NTENDED TO SHOW THE GENERAL PLAN AND ELEVATON OF THE BRDGE " -- SYSTEM wn-h PLES ONLY. THE CONTRACTOR S NOTFED THAT THERE ARE NUMEROUS ADJACENT STRUCTURES i Z-- (NCLUDNG DOCKS) WTHN CLOSE PROXMTY OF THE BRDGE. THE CONTRACTOR'S o M OPERATONS SHALL NOT NTERFERE WTH THE OPERATONS OF THE EXSTNG ADJACENT 63'-" BOSTON ABUTMENT PER._ ] PER 3 (TO REMAN) 27'-" STRUCTURES. (TO REMAN) (TO REMAN) L-- 8. CONTRACTOR OPERATONS SHALL NOT NTERFERE WTH ACCESS TO THE BOSTON HARBOR SUBMARNE CABLE " : 2 v Z WALK OR THE U.S. DEPARTMENT OF COMMERCE'S NATONAL OCEAN SERVCE TDE STATON EXST. SD EWALK ELECTRCAL CONDUT SOUTH BOSTON ABUTMENT (SEE NOTE 6).4 WTHOUT PROR WRTTEN APPROVAL FROM THE ENGNEER. TO REMAN OPEN (SEE NOTE 6) (TO REMAN) q+ -EXSTNG FENDER AT PAM c PER 2 (TO REMAN) mxqm m CP SHEET 3 OF 4.4" ND 3246 a NEW FLOATNG BARRER SYSTEM WTH PLES 'j il A (TO REMAN) L.. EXSTNG SWNG PER FENDER,,,,,:... qr A CTY OF BOSTON PUBLC WORKS DEPARTMENT ENGNEERNG DVSON NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE SURVEY BY NONE GENERAL PLAN AND ELEVATON 8.9._o 6 B_.., t..2.3 DRAWN BY CCJ GENERAL PLAN OF BRDGE CHECKED BY FOP SCALE 32" = l'-o" SCALE: AS NOTED b-,-. CTY ENGWEER DATE: FEB 26

10 SUGGESTED SEQUENCE OF CONSTRUCTON GENERAL THE FOLLOWNG CONSTRUCTON PROCEDURE AND EQUPMENT NFORMATON (DENTFED N THESE PLANS) S NTENDED AS A SUGGESTON OF ONE FEASBLE METHOD N ORDER TO PROVDE A UNFORM BASS FOR BDDNG AND TO ACQURE THE APPROPRATE PERMTS. ANY CHANGES TO THE PERMTS DUE TO THE CONTRACTOR'S MEANS AND METHODS SHALL BE THE CONTRACTOR'S RESPONSBLTY. THE CONTRACTOR SHALL SUBMT THE NTENDED CONSTRUCTON PROCEDURE, TALORED TO THER FRM'S CAPABUTES, TO THE ENGNEER FOR APPROVAL. CONSTRUCTON PROCEDURES SHALL BE SUBMTTED FOR ALL TEMS OF WORK. SUBMTTED SEQUENCES WHCH RESULT N A LONGER DURATON OF WORK, RESULT N ADDTONAL RESOURCE AREA MPACTS, OR ADVERSELY AFFECT NAVGATON WLL NOT BE FAVORABLY CONSDERED. SHORT-TERM PARTAL CLOSURE OF THE NAVGATON CHANNEL (WHEN NECESSARY) SHALL BE COORDNATED AND SCHEDULED WTH THE CTY AND APPROVED BY THE UNTED STATES COAST GUARD. PLEASE NOTE THAT THE UNTED STATES COAST GUARD S LOCATED N THE 8-STORY BULDNG ADJACENT TO SPAN. PROR TO ANY MODFCATON TO EXSTNG STEEL (CUTTNG, WELDNG, ETC.) REMOVE LEAD PANT N ACCORDANCE WTH THE CONTRACTOR'S APPROVED LEAD ABATEMENT PLAN. NOTE WELL THE CONTRACTOR S CAUTONED THAT STRUCTURAL NTEGRTY OF THE EXSTNG TRUSS SPANS S NOT ASSURED DUE TO STRUCTURAL STEEL DETERORATON. LOCAL FALURES ARE POSSBLE. THE CONTRACTOR SHALL MANTAJN BALANCE AND STABLTY OF THE SWNG SPAN DURNG CONSTRUCTON WTH REMOVAL OPERATONS PROCEEDNG N A SYMMETRCAL SEQUENCE. CAUTON - THE TENDER'S HOUSE S SUSPECTED OF CONTANNG ASBESTOS AND ALL STRUCTURAL STEEL S SUSPECTED OF BENG COATED WTH LEAD BASED PANT. PROHBTON OF EXPLOSVE REMOVAL METHODS THE USE OF EXPLOSVE REMOVAL METHODS S STRCTLY PROHBTED. GENERAL PRELMNARY PREPARATON WTHN 72-HOURS OF NOTCE-TO-PROCEED THE CONTRACTOR SHALL MOBLZE ON BOTH STES - THE BRDGE (BOSTON) AND THE STORAGE YARD (EAST BOSTON). BEGN BRDGE WORK BY CUTTNG AND REMOVNG PLES BELOW THE SWNG SPAN AT THE BRDGE AND BEGN STORAGE YARD WORK BY CLEARNG THE STE. THE STORAGE YARD S LOCATED AT 338 EAST EAGLE STREET N EAST BOSTON. THE CONTRACTOR S REQURED TO MAKE ALL NECESSARY FELD MEASUREMENTS AND SUBMT REQURED SHOPWORKNGREMOVAL DRAWNGS FOR APPROVAL UPON APPROVAL, THE CONTRACTOR SHALL PROCURE MATERALS AND EQUPMENT N A MANNER AND SEQUENCE SO AS TO AVOD DELAYS N THE WORK, THE CONTRACTOR SHALL SUBMT A WORK SCHEDULE AND DETALED CONSTRUCTON PROCEDURES FOR ALL REMOVAL STEPS, WHCH MUST BE A WELL PLANNED AND COORDNATED SEQUENCE OF ACTVTES. THS WORK SCHEDULE AND ANY REQURED DETALED CONSTRUCTON PROCEDURES SHALL BE SUBMTTED FOR APPROVAL. THE CONTRACTOR WLL NOT BE PERMTTED TO UTLZE A CONSTRUCTON PROCEDURE THAT ALLOWS ANY PORTON OF THE STRUCTURE TO BE DROPPED NTO THE WATER AND LATER PCKED FOR REMOVAL. CONTRACTOR STAGNG AREAS NCLUDE: A PORTON OF THE ROADWAY AREA NEXT TO THE BOSTON ABUTMENT BETWEEN THE JAMES HOOK PROPERTY AND THE USCG BULDNG; SPAN 3 AND A PORTON OF THE ROADWAY ADJACENT TO THE SOUTH BOSTON ABUTMENT: AND, A PORTON OF THE STORAGE YARD N EAST BOSTON LOCATED AT 338 EAST EAGLE STREET. MPORTANT FRST TEMS. THE CONTRACTOR SHALL PERFORM A SURVEY OF THE CHANNEL BOTTOM AT THE BRDGE WTHN THE LMTS SHOWN N THE 2 HYDROGRAPHC SURVEY PROVDED N APPENDX A OF THE CONTRACT DOCUMENTS. N ADDTON, THE CONTRACTOR SHALL OBTAN LOW TDE COLOR PHOTOGRAPHS OF THE TDAL FLAT AREA ADJACENT TO THE STORAGE YARD. 2. THE CONTRACTOR SHALL FND, COLLECT. AND SECURE SALVAGE TEMS COMPONENTS OF HSTORCAL SGNFCANCE AND TEMS COMPONENTS THAT THE CTY WANTS TO RECLAM FOR USE AT ANOTHER LOCATON. THESE TEMS SHALL BE RELOCATED AND PROTECTED AT THE STORAGE YARD. REMOVAL OF TENDER'S HOUSE 3. POSTON WORK BARGES ADJACENT TO TENDER'S HOUSE. 4. PERFORM PHOTOGRAPHC DOCUMENTATON OF THE NSDE AND OUTSDE OF THE TENDERS HOUSE. 5. REMOVE ASBESTOS CONTANNG MATERALS AND DSPOSE OF N AN APPROVED MANNER. 6. REMOVE THE ROOF OF THE TENDERS HOUSE. 7. PCK THE COMPONENTS OF HSTORCAL SGNFCANCE AND RELOCATE TO THE STORAGE YARD. 8. REMOVE THE REMANNG TENDERS HOUSE WALLS. FLOOR, AND SUPPORTNG TMBER PLES. ALL TENDER'S HOUSE PLES SHALL BE CUT AND REMOVED TO AN ELEVATON 3-FEET ABOVE THE MUDLNE. REMOVAL OF SWNG SPAN TRUSS 9. THE CONTRACTOR SHALL DSCONNECT ALL POWER TO THE SWNG SPAN BY REMOVAL OF THE ELECTRC CABLE LOCATED ON TOP OF THE DECK N SPAN. THE SUBMARNE CABLE ON TOP OF THE MUCK LNE BETWEEN PER AND THE SWNG PER SHALL BE REMOVED AFTER THE TME OF YEAR RESTRCTON FOR WORK DSTURBNG SEDMENTS. NSTALL TEMPORARY LGHTNG ON FENDER SYSTEM.. REMOVE THE TOP PORTON OF ALL TMBER PLES THAT ARE DRECTLY UNDERNEATH THE SWNG SPAN AND BEHND THE NAVGATON CHANNEL FENDER SYSTEM TO FACLTATE BARGE OPERATONS. EACH NDVDUAL PLE SHALL BE CUT AND REMOVED AT AN ELEVATON OF APPROXMATELY 3-FEET ABOVE THE MUDLNE.. REMOVE THE FENDER TAL (DENTFED ON THE PLANS) TO FACLTATE BARGE OPERATONS WHCH ALLOWS FOR BARGE ACCESS ABOVE THESE PLES. THE CONTRACTOR MUST LEAVE A SUFFCENT LENGTH OF THE EXSTNG PLE TO FACLTATE PLE REMOVAL BY PULLNG AFTER BRDGE REMOVAL (ASSUMED TO BE APPROXMATELY 3-FEET ABOVE THE MUDLNE). AT A FUTURE DATE (PHASE ) EACH REMANNG STUB OF A PLE SHALL BE LOCATED AND PULLED N TS ENTRETY. 2. THE CONTRACTOR MAY DRVE UP TO 2 TMBER PLES (2-NCH DAMETER) AT EACH END OF THE SWNG SPAN TO SUPPORT THE ENDS OF THE SWNG SPAN. N ADDTON, THE CONTRACTOR MAY NSTALL AND TENSON WRE ROPE TEDOWNS AS NECESSARY TO ENHANCE THE STABLTY OF THE SWNG SPAN. 3. PLACE FLOAT-OUT BARGES (WTH SPUDS REMOVED) DRECTLY UNDERNEATH EACH CANTLEVERED PORTON OF THE SWNG SPAN TRUSS DURNG LOW TDE. UTLZE FULL BALLAST TO MANTAN A LOW POSTON. 4. SECURE THE FLOAT-OUT BARGES BY MOORNG TO THE EXSTNG FENDER SYSTEM AND THE SWNG PER TO PREVENT LATERAL MOVEMENT OR HORZONTAL LOADS ON THE SWNG TRUSS DURNG BRDGE LFTNG AND FLOAT-OUT OPERATONS. THE MOORNG UNES SHOULD BE CLEARLY MARKED AND LLUMNATED AT NGHT N ACCORDANCE WTH UNTED STATES COAST GUARD REGULATONS. THE MOORNG U NES SHOULD NOT NFRNGE ON THE NAVGATONAL CHANNEL. 5. PLACE A WORKNG BARGE ADJACENT TO EACH FLOAT-OUT BARGE AWAY FROM THE NAVGATON CHANNEL ON THE WEST SDE OF THE SWNG PER UTLZNG SPUDS TO PREVENT LATERAL MOVEMENT. 6. NSTALL TEMPORARY TRUSS STRENGTHENNG FOR MEMBERS SHOWN AS REQURED. PREPARATON OF THESE LOCATONS REQURES SPECAL CONSDERATON DUE TO LEAD PANT. THE CONTRACTOR SHALL SUBMT COMPLETE DETALED CALCULATONS AND PROCEDURES FOR THE ENTRE REMOVAL PROCESS FOR APPROVAL BASED UPON THER MEANS AND METHODS PROR TO REMOVAL. 7. PLACE SUPPORT PONTS AT EACH CANTLEVERED PORTON OF THE SWNG TRUSS ON LOWER CHORD TRUSS JONTS AT MULTPLE LOCATONS AS SHOWN ON THE PLANS. 8. PLACE GRLLAGE ON FLOAT-OUT BARGE AT LOCATONS SHOWN ON THE PLANS AND NSTALL WRE ROPE TE-DOWNS TO THE BARGE WTH ADEQUATE SLACK AS REQURED. SHM AS REQURED ALLOWNG APPROXMATELY 6-NCH GAP BETWEEN THE TOP OF THE GRLLAGE AND THE UNDERSDE OF THE TRUSS LOWER JONT. 9. PREPARATON OF THE CUT LOCATONS REQURES SPECAL CONSDERATON DUE TO LEAD PANT. ALONG THE CENTERLNE OF THE SWNG PER BAY, CUT THE DECK, STRNGERS, FLOORSYSTEM LATERAL BRACNG AND TOP CHORD LATERAL BRACNG ACROSS THE FULL WDTH OF THE SPAN. REMOVE THE NUTS FOR BOLTS CONNECTNG THE NTEROR TRUSS BEARNGS TO THE TOP FLANGE OF THE DSTRBUTON GRDER SUPPORTS. DSCONNECT ANY OTHER CONNECTONS AS REQURED TO PROVDE FREEDOM OF MOVEMENT FOR LFT PROVDED BY THE BARGES. 2. USNG A COMBNATON OF DE-BALLASTNG AND A RSNG TDE, RASE BOTH FLOAT-OUT BARGES SMULTANEOUSLY SUCH THAT THE CANTLEVERED SPANS FULLY BEAR ON THE GRLLAGES. THE NTENT S TO TRANSFER THE FULL REACTON OF THE SUPPORTED TRUSS CANTLEVERS OF THE SWNG SPAN TO THE BARGES. THS SHALL BE ACHEVED BY MONTORNG THE FREEBOARD AND ELEVATON OF THE TRUSS SUPPORT PONTS, WTH BARGE RASNG OPERATONS CONTNUNG UNTL THE TRUSS SUPPORT PONTS START TO LFT. 2. CUT TRUSS MEMBERS ALONG THE CENTERLNE OF THE SWNG PER BAY AT ALL FOUR TRUSSES (SMULTANEOUSLY) WHLE THE TDE AND BARGE ARE STLL RSNG. DURNG THS CUTTNG OPERATON THE VERTCAL ELEVATON OF THE TRUSS SUPPORT PONTS SHALL BE MONTORED TO ENSURE CONTNUED LOAD TRANSFER TO THE BARGE. THE CONTRACTOR SHALL PUMP BALLAST AS REQURED. PROR TO CUTTNG, ALL TRUSS MEMBERS MUST BE CLEANED TO SSPC SP3 FOR A DSTANCE OF -" ON EACH SDE OF THE PLANNED CUT. ALL CLEANNG TO BE PERFORMED WTHN A CONTANMENT SYSTEM APPROVED BY THE ENGNEER. 22. UPON LOAD TRANSFER TO GRLLAGES, THE ELEVATONS OF THE BARGES SHALL BE CONTNUOUSLY MONTORED AND MANTANED CONSTANT AND LEVEL BY BALLAST ADJUSTMENTS TO COMPENSATE FOR TDAL VARATON. 23. FLOAT-OUT EACH CANTLEVERED PORTON OF THE SWNG TRUSS SPAN NTO BOSTON HARBOR AND PAST THE MERDAN STREET BRDGE ON THE CHELSEA RVER TO THE STORAGE YARD. 24. REMOVE THE DSTRBUTON GRDERS, DRUM GRDER, CRCULAR RACK ON THE TOP OF THE SWNG PER AND ALL STRUCTURAL STEEL AND OTHER MATERALS WTHN THE SWNG PER PT. TRANSPORT THESE MEMBERS TO THE STORAGE YARD. REMOVAL OF SPAN TRUSS 25. PLACE REMOVAL BARGES DRECTLY UNDERNEATH THE SPAN TRUSS. 26. REMOVE THE DECK AND FLOORSYSTEM N THE MDDLE BAY AS SHOWN ON THE PLANS AND REMOVE THE DECK N THE OUTER BAYS. PROVDE CONTANMENT BELOW ALL BAYS TO PREVENT DEBRS FROM FALLNG NTO WATER AND N ACCORDANCE WTH THE CONTRACTOR'S APPROVED LEAD ABATEMENT PLAN AND SPECAL PROVSONS. 27. PLACE FLOAT-OUT BARGES (WTH SPUDS REMOVED) DRECTLY UNDERNEATH EACH HALF OF THE SPAN TRUSSES DURNG LOW TDE. UTLZE FULL BALLAST TO MANTAN A LOW POSTON. 28. SECURE THE REMOVAL BARGES AND FLOAT-OUT BARGES BY MOORNG TO THE EXSTNG EAST ABUTMENT AND PER TO PREVENT LATERAL MOVEMENT OR HORZONTAL LOADS ON THE TRUSS DURNG BRDGE LFTNG AND FLOAT-OUT OPERATONS. THE MOORNG LNES SHOULD BE CLEARLY MARKED AND LLUMNATED AT NGHT N ACCORDANCE WTH UNTED STATES COAST GUARD REGULATONS. 29. PLACE A WORKNG BARGE ADJACENT TO THE FLOAT-OUT BARGES AS NEEDED UTLZNG SPUDS TO PREVENT LATERAL MOVEMENT. 3. NSTALL TEMPORARY TRUSS STRENGTHENNG FOR MEMBERS SHOWN ON THE PLANS. THE CONTRACTOR SHALL SUBMT CONNECTON DETAL CALCULATONS AND PROCEDURES FOR REVEW AND APPROVAL BY THE ENGNEER PROR TO REMOVAL. 3. PLACE SUPPORT PONTS AT EACH HALF OF THE SPAN TRUSS ON LOWER CHORD TRUSS JONTS AT MULTPLE LOCATONS AS SHOWN ON THE PLANS. 32. PLACE GRLLAGE ON FLOAT-OUT BARGES AT LOCATONS SHOWN ON THE PLANS AND NSTALL WRE ROPE TEDOWNS TO BARGE WTH ADEQUATE SLACK AS REQURED. SHM AS REQURED ALLOWNG APPROXMATELY 6-NCH GAP BETWEEN THE TOP OF THE GRLLAGE AND THE UNDERSDE OF THE TRUSS LOWER JONT. 33. USNG A COMBNATON OF DE-BALLASTNG AND A RSNG TDE, EACH FLOAT-OUT BARGE (ONE AT A TME) FULLY ENGAGNG THE GRLLAGES. UPON LOAD TRANSFER TO GRLLAGES, THE ELEVATONS OF THE BARGES SHALL BE MONTORED AND ADJUSTED WTH BALLAST AS NECESSARY. TENSON WRE ROPE TEDOWNS TO SNUG-TGHT CONDTON. SURVEY BY NONE DRAWN BY CCJ 34. FLOAT-OUT EACH HALF OF THE SPAN TRUSS SPAN NTO BOSTON HARBOR AND PAST THE MERDAN STREET BRDGE ON THE CHELSEA RVER TO THE STORAGE YARD. REMOVAL OF SPAN 2 TRUSS 35. REPEAT SEQUENCE TEMS 25 TO 34 FOR THE SPAN 2 TRUSS. REMOVAL OF SUBMARNE CABLE 36. REMOVE ELECTRC SUBMARNE CABLE FROM PER. FENDER SYSTEM 37. NSTALL ADDTONAL FLOATNG FENDER SYSTEM AROUND THE SWNG PER AND PER 2 AT LOCATONS SHOWN ON THE PLANS. 38. PROVDE SOLAR POWERED LGHTNG TO FENDER AND PERS AS DENTFED N THE SPECAL PROVSONS. MPORTANT LAST TEMS 39. NSTALL FENCE AND CONCRETE BARRERS AT BOTH ENDS OF THE BRDGE. 4. PERFORM SURVEY OF THE CHANNEL BOTTOM AT THE BRDGE (BOSTON) WTHN THE LMTS SHOWN N THE 2 HYDROGRAPHC SURVEY PROVDED N APPENDX A OF THE CONTRACT DOCUMENTS. N ADDTON, THE CONTRACTOR SHALL OBTAN LOW TDE COLOR PHOTOGRAPHS OF THE TDAL FLAT AREA ADJACENT TO THE STORAGE YARD (EAST BOSTON). 4. COMPLETE FNAL REMOVAL OF ANY DENTFED CONSTRUCTON DEBRS. CP 6-93 SHEET 4 OF 4 CTY OF BOSTON PUBLC WORKS DEPARTMENT ENGNEERNG DVSON NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE SUGGESTED CONSTRUCTON SEQUENCE OF CHECKED BY FOP SCALE: AS NOTED DATE: FEB 26? CTY ENGNEER

11 SUGGESTED SEQUENCE OF CONSTRUCTON (CONTNUED) CTY OWNED STORAGE YARD AT EAST EAGLE STREET N EAST BOSTON PLEASE NOTE THAT THS STORAGE YARD HAS SPECFC ENVRONMENTAL CONSDERATONS. THE CONTRACTOR S NOT ALLOWED TO PUNCTURE OR PENETRATE THE TOP SURFACE OF THE YARD. CONSTRUCTON ACTVTES AT THE EDGE OF THE YARD ADJACENT TO THE WATER SHOULD MNMZE DSTURBANCE OF N-STU MATERAL AS MUCH AS POSSBLE. 5. REPOSTON FLOAT AND ADJUSTABLE TRANSPORT RAMP AS NECESSARY TO RECEVE THE APPROACH SPAN TRUSSES. 6. SPMT'S REPEAT PROCESS AS BARGES CARRYNG THE FOUR APPROACH SPAN TRUSS PECES ARRVE AT THE STORAGE YARD. FMB7F YARD MOBLZE YARD 7. REMOVE FLOAT, ADJUSTABLE SUPPORT RAMP, STEEL TRESTLE, AND ANY STEEL PLATES OR CRANE MATS PLACED AND POSTONED FOR CONTRACTOR OPERATONS.. PREPARE THE YARD BY CLEARNG THE WORK AREA TO A FLAT SURFACE. TREES AND OTHER VEGATATON SHOULD BE CUT HORZONTALLY AT TFE 8. CONSTRUCT A NEW FENCE AT THE EDGE ON THE BANK N THE SAME GROUND LNE ONLY N AN ATTEMPT TO AVOD ENVRONMENTAL DSTURBANCE. POSMON AS THE ORGNAL FENCE. THE FENCE ADJACENT TO THE WATER SHOULD BE REMOVED TO THE EXTENT NECESSARY TO FACLTATE THE CONTRACTORS OPERAHONS. OTHER YARD COMPONENTS, OBSTRUCTONS, OR DEBRS SHOULD BE REMOVED BY THE CONTRACTOR N COORDNATON WTH THE CTY. 2. MARKOUT THE FNAL LAYOUT AREAS FOR THE PECES THAT WLL BE TRANSPORTED AND RECEVED AT THS STE AND THE NTENDED POSTON OF CRANE AND PATH(S) OF SPMT'S (SELF-PROPELLED MODULAR TRANSPORTS). THE PECES MOVED TO THS STE NCLUDE BOTH HALES OF THE SWNG TRUSS, TWO APPROACH TRUSS PECES FROM TRUSS SPAN, TWO APPROACH TRUSS PECES FROM TRUSS SPAN 2, AND SALVAGEHSTORC TEMS. 3. PLACE STEEL PLATE OR CRANE MATS ON TOP OF THE EXSTNG GROUND TO FACLTATE CONTRACTOR PROPOSED OPERATONS AS NECESSARY. YARD CONSTRUCTON 4. CONSTRUCT A TEMPORARY STEEL TRESTLE TO SPAN BETWEEN THE ADJUSTABLE TRANSPORT RAMP AND THE STORAGE YARD. 5. FLOAT-N THE ADJUSTABLE TRANSPORT RAMP (FABRCATED OFF-STE) AND CONNECT THE LAND SDE END OF THE RAMP TO THE FXED TRESTLE. THS RAMP MUST LAUNCH ON TOP OF THE BARGE AND BE POSMONED TO ALLOW SPMT'S TO TRANSPORT VAROUS PECES OF THE STRUCTURE. 6. THE RVER SDE END OF THE ADJUSTABLE TRANSPORT RAMP SHALL BE SUPPORTED BY AN ADJUSTABLE FLOAT TO ACCOMMODATE THE FLOAT-N BARGES. THS FLOAT WLL NEED TO BALLAST AS NECESSARY TO NTERFACE WTH THE FLOAT-N BARGES, MOVE LATERALLY (TOWARDS LAND AND AWAY FROM LAND ALONG THE RAMP) TO ACCOMDATE POSTONNG OF THE BARGES, AND PROVDE SUPPORT FOR THE ADJUSTABLE TRANSPORT RAMP PROR TO AND AFTER BARGE OPERATONS. THE FLOAT S ALSO NTENDED TO KEEP THE END OF THE RAMP OUT OF THE WATER. RECEVE SWNG TRUSS AND APPROACH SPAN TRUSSES 7. SPMT'S ARRVE ON-STE AND ARE POSTONED TO RECEVE THE TRUSSES. CM-5 CONSTR. SEQUENCE -2,m P lottod: Feb 5, 26 8:396rn MPORTANT - STEPS 2 TO 6 MUST BEGN ON A RSNG TDE AND BE COMPLETED WHLE ADEQUATE DRAFT REMANS N THE TDAL BASN WORK AREA DURNG ONE TDE CYCLE SO THAT THE STRUCTURE S NOT STRANDED ON THE FLOAT-N BARGE. 9. FRST HALF OF SWNG TRUSS ARRVES AT THE STORAGE YARD VA BARGE WHLE THE TDE S RSNG. THS FLOAT-N BARGE S PLACED ADJACENT TO THE ADJUSTABLE TRANSPORT RAMP AS SOON AS DRAFT S AVALABLE AND MOVED TOWARDS THE STORAGE YARD, PUSHNG THE FLOAT. THS PROCESS LAUNCHES THE RAMP ON TOP OF THE BARGE DRECTLY UNDERNEATH THE SPMT SUPPORT LOCATONS ON THE TRUSS.. REPOSTON THE FLOAT OUT OF THE WAY AND PUSH THE FLOAT-N BARGE TOWARDS THE TRESTLE.. SPMT TRAVELS FROM THE STORAGE YARD, ONTO THE TRESTLE AND ONTO THE RAMP THAT S NOW ON TOP OF THE BARGE. POSTON SPMT DRECTLY UNDER THE SPMT SUPPORT LOCATONS ON THE TRUSS. 2. PCK UP TRUSS AND SLOWLY (N A CONTROLLED MANNER) MOVE THE TRUSS USNG THE SPMT'S ONTO THE TRESTLE, ONTO LAND, AND ONTO THE FNAL LAYOUT POSTON FOR THAT TRUSS PECE. G r" NORTON, 3. MOVE BARGE AWAY AND REPOSTON FLOAT TO SUPPORT ADJUSTABLE No 3286 c. TRANSPORT RAMP WATNG FOR ARRVAL OF THE NEXT BARGE AND RSNG ' l'-'2..- (. TDE.,,,,,, 4. POSTON SPMT'S TO RECEVE SECOND HALF OF SWNG TRUSS AND REPEAT 2-5-m4 PROCESS UNTL BOTH HALFS OF THE SWNG TRUSSES ARE RESTNG N THER FNAL LAYOUT POSTON. 35 -] 2 _ 5 CP 6-93 SHEET 5 OF 4 CRY OF BOSTON PUBLC WORKS DEPARTMENT ENGNEERNG DVSON NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE SURVEY BY NONE SUGGESTED CONSTRUCTON DRAWN BY CCJ SEQUENCE 2 OF 2 CHECKED BY FDP SCALE: AS NOTED DATE: FEB 26 ` CTY ENGNEER

12 cv, 8'-6"± 5-9± NORTH EXTENSON i 4R r RECEVER ROOM POWER ROOM L, Al Or :H..4- = WNDOW SOUTH WALL -- = DOOR (g) = ACCESS DOOR - TMBER SHEATHNG,.r-7....,, M.WA,4%. W.. BROWN POLY TARP MP.) d z JUNCTON BOX L _ 42.-4± Al, A mi.; A ii. in m dm mi gm k,-.. El... BOARDED WNDOWS (TYP.) EL 8.54 _,MEAN HGH WATER EL ELECTRCAL CONDUT (SEE NOTE 7) TMBER NALNG STRAPS AROUND PERMETER OF TARP (TYP.) _m_mean LOW WATER EL GENERAL PLAN VEW ROOF PLAN EAST EXTEROR ELEVATON SCALE: NOT TO SCALE SCALE: NOT TO SCALE SCALE: NOT TO SCALE ai 6 TENDE R.dwg, Plo tte d: F,... L'. _ NORTH EXTENSON NOTES. FOR GENERAL NOTES AND SUGGESTED CONSTRUCTON SEQUENCE, SEE SHEETS 2, 4 AND PROR TO COMMENCNG WORK, THE CONTRACTOR SHALL OBTAN PHOTO DOCUMENTATON OF THE AR TANK ENTRE EXTEROR AND NTEROR OF HOUSE. THS DOCUMENTATON SHALL BE PERFORMED BY AN ARCHTECTURAL HSTORAN OR OTHER QUALFED PERSONNEL APPROVED BY THE REGULATORY (SEE NOTE 3) AGENCY. L, = AR COMPRESSOR ANN. Am. (SEE NOTE 3).UU US ;H.imp...9( mimr, D WATER TANK (SEE NOTE 3) '_ 7 ASPHALT SHNGLES (TYP.) BOARDED DOOR (rep.) 3. THE TENDER'S HOUSE S KNOWN TO CONTAN ASBESTOS-CONTANNG MATERALS (ACM), POLYCHLORNATED BPHENYLS (PCB's), AND LEAD CONTANNG PANT (LCP). SEE SPECAL PROVSONS FOR TREATMENT AND DSPOSAL OF THESE HAZARDOUSREGULATED MATERALS. 4. ALL TANKS AND COMPRESSORS SHALL BE DSCONNECTED AND REMOVED FOR RELOCATON TO THE STORAGE YARD. N ORDER TO GAN ACCESS TO REMOVE THESE TEMS, THE ROOF SHALL BE - REMOVED. WOOD SHNGLES (TYP.) 7 i - 5. THE ENTRE HOUSE SHALL BE REMOVED AND DSPOSED. TMBER PLES (TYP.) 6. FOR ADDTONAL NFORMATON REGARDNG THE HOUSE, THE CONTRACTOR S DRECTED TO THE REFERENCE DOCUMENTS N APPENDX A OF THE CONTRACT DOCUMENTS, SPECFCALLY THE AUGUST 2 DESGN SKETCHES FOR WEATHERZNG AND PROTECTON OF THE TENDER'S HOUSE. 7. THE ELECTRCAL CONDUT SHALL BE DE-ENERGZED AND REMOVED. RECEVER TANKS (TYP.) (SEE NOTE 3), OF PAUL G CP 6-93 SHEET 6 OF 4 PLL 32e6 4 SOUTH EXTEROR ELEVATON '..,"Mt. CTY OF BOSTON PUBLC WORKS DEPARTMENT PLAN VEW (EXSTNG NTEROR COMPONENTS) SCALE: NOT TO SCALE...4 ENGNEERNG DVSON SCALE: NOT TO SCALE z -5 -zot NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE. SURVEY BY NONE TENDER'S HOUSE REMOVAL DRAWN BY BB NOP 'OH CHECKED BY FOP SCALE: AS NOTED DATE: FEB 26 CTY ENGN ErR--Ns,:3

13 Q BRDGE WORK BARGE (TYP.) LJMTS OF WORK BARGE (TYP.) [SWNG SPAN SUPERSTRUCTURE A3) *ft,... D. : SUGGESTED TRUSS SUPPORT LOCATON (TYP.) ,.. X X EXTEROR TRUSS Al FLOAT OUTBARGE (TYP.) L LMTS OF SWNG PER i- ALL PLES BEHND FENDER CUT TO 3-" X q NTEROR TRUSS 8 - ABOVE MUDLJNE (TYP.) q SWNG SPAN SUPERSTRUCTURE co r X, 8.B 83 8_83 Bali 8Th6 8&8 8L i88 Ba _Fs_ L _8 _3. : 7 ) 29 TONS (YP.) 26 TONS (TYP.) (SEE NOTE 4) (SEE NOTE 4)- Q NTEROR TRUSS B 82 TONS (TYP.) 8 TONS (TYP.).--- (SEE NOTE 4) (SEE NOTE 4)-A. x q EXTEROR TRUSS Al 8 A 8.8 _S _3. 8_8 _8.8_ 8_B _8_ 8.8 g_ 8L 8 _8 3_ _8 8_ 8$ 8_ 8 _B 3.8 (t, 8 REAR BATTERED PLE (TYP.) (SEE NOTE 3) PONT CHANNEL...FORT BOSTON HARBOR NAVGATON REMANNG FENDER SYSTEM BEYOND 7 CHANNEL THS LNE NOT SHOWN FOR CLARTY NOTES GENERAL PLAN OF SWNG SPAN. FOR GENERAL NOTES AND SUGGESTED CONSTRUCTON SEQUENCE, REFER TO SHEETS 2, 4 AND 5. SCALE: f6" = -" 2. FOR EXSTNG STRUCTURE NFORMATON, THE CONTRACTOR S DRECTED TO APPENDX A OF THE CONTRACT DOCUMENTS. lb 5, 26 6:4m C. EA z ' ' f. 3. THE CONTRACTOR S NOTFED THAT THE REAR BATTERED PLES TO REMAN WLL PRESENT A RESTRCTON TO THE FLOAT-OUT BARGE ALONG THE BACK OF THE FENDER PORTON TO REMAN. SWNG PER 4. THE WEGHT OF EACH SECTON OF THE BRDGE TO BE UFTED BY BARGE FOR FLOAT-OUT.-- SUGGESTED CUT LNE FOR S ESTMATED TO BE APPROXMATELY 5 TONS. T SHOULD BE NOTED THAT THE TRUSS MEMBERS AFTER SUPPORT LOCATONS, LOADS, ETC. ARE BASED ON THE SUGGESTED PROCEDURE ON THS BARGE SUPPORT S N PLACE SHEET. THE CONTRACTOR SHALL DETERMNE AND SUBMT THER PROPOSED PROCEDURE FOR REVEW AND APPROVAL. THE ESTMATED LOADS AT EACH OF THE FOUR TYPES OF 4-3± 4'-3"± PCK PONTS ARE DENTFED N THE PLAN VEW. (FLOAT-OUT SECTON LENGTH) (FLOAT-OUT SECTON LENGTH) U5 U6 5. TRUSS MEMBERS HGHLGHTED WTH THCK SOLD LNES ARE SUBJECTED TO COMPRESSVE MEMBER TO BE BRACED _ FORCES DURNG FLOAT-OUT. PROR TO LFTNG BY BARGE, MEMBER COMPONENTS _ (TYP.) (SEE NOTE 5) U 7 (EYEBARS) FOR THESE MEMBERS SHALL BE ADEQUATELY BRACED. THE EYEBARS AT EACH _ BRACE PONT MAY BE BRACED TOGETHER BY CLAMPNG WTH PLATES AND THREADED U 8 RODS, WTH BLOCKNG BETWEEN EYEBARS TO MANTAN EXSTNG SPACE BETWEEN U U9 EYEBARS. N ADDTON, THE HGHLGHTED DAGONAL MEMBERS SHALL BE EXTERNALLY U9 U _ --- Un --- U2 U2 z U22 BRACED AS REQURED BY PROVDNG COMPRESSON STRUTS TO PREVENT BUCKLNG N N. 7F THE PLANE OF THE TRUSS. ' 6. AT THE LFTNG LOCATONS, THE TRUSS BOTTOM CHORD AND PN SHALL BE ADEQUATELY X K, - > BLOCKED TO ENSURE FULL LOAD TRANSFER TO THE TRUSS..-6-± x. X X 7. AFTER UFTNG BY BARGE AND REMOVAL FROM BRDGE STE, ADDTONAL BARGE SECTONS N. SHALL BE ATTACHED TO THE BARGE AT ONE END OF THE BARGE LENGTH TO ENABLE V PAO L3 L5 L 6 7 L8 L2ONL L2 PCK AT BOTTOM CHORD PANEL PONTS L4 St L7 AT EACH TRUSS PROR TO ROLL OUT L9 lilai L2 L9 r--- MC L22 AT THE STORAGE YARD. i Frrrrd krrrr.,. C.G. OF FLOAT-OUT xmarmx = GRLLAGE 8. THE CONTRACTOR SHALL MANTAN THE BARGE LEVEL N BOTH DRECTONS AT ALL TMES SYSTEM (TYP.) mamma SECTON (TYP.) mmx.mm..... BY BALLASTNG THE BARGE AS REQURED. 9. FOR EXSTNG CROSS-SECTON OF SWNG SPAN, REFER TO B-6-84_6--3_.TF, 974 REHAB PDFS &986 REHAB PDFS N APPENDX A OF THE CONTRACT DOCUMENTS. PROR TO LFT BY BARGE, DSCONNECT CUT DECK, SUGGESTED TRUSS SUPPORT L MEAN LOW WATER EL BOLTS FOR NTEROR TRUSS B BEARNGS STRNGERS, FLOOR LOCATON FOR ROLL-OUT FLOAT-OUT BARGE (TYP.) MEAN SEA LEVEL EL -.3 SYSTEM BRACNG, APPROX. MUDLNE- AT STORAGE YARD (TYP.) ETC. PROR TO M EAN HGH WATER EL (SEE NOTE 7) BARGE SUPPORT it. PAG'L.. s, _ GENERAL ELEVATON 4, ex SCALE: Tig" = -" NOROt4 'Z.'... 32e ig CP 6-93 SHEET 7 OF 4 t.,, N ' 2-5-2o te, CTY OF BOSTON PUBLC WORKS DEPARTMENT ENGNEERNG DVSON NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE SURVEY BY NONE SWNG SPAN REMOVAL & DRAWN BY CCJ RELOCATON os _ 35 2 _ 7 CHECKED BY FDP SCALE' AS NOTED DATE: FEB 26 CTY ENGJEER

14 - TYPCAL PANEL LENGTH FOR TRUSS B2 END PANEL ADJACENT TO SWNG SPAN. r, _ oi U ± U24 _ MEMBER TO BE BRACED (TYP.) (SEE NOTE 5) 7 2'-2 = " - U25 N U26 7 U27 U28 U29 U3,, i X X L L25 SLOPE L29 i.... L28 L3 2. FOR EXSTNG STRUCTURE NFORMATON, THE CONTRACTOR S DRECTED TO L23 NOTES. FOR GENERAL NOTES AND SUGGESTED CONSTRUCTON SEQUENCE, REFER TO SHEETS 2, 4 AND 5. SEE NOTE 9- L26 L27 APPENDX A OF THE CONTRACT DOCUMENTS. dat 'GRT 3. THE SUGGESTED CONSTRUCTON PROCEDURE S BASED ON THE FULL limit [ MEAN HGH WATER v SEE NOTE 9 THCKNESS OF THE ROADWAY DECK N THE TWO EXTEROR BAYS BENG -GRLLAGE EL SUGGESTED TRUSS SUPPORT i z REMOVED PROR TO LFTNG BY BARGE FOR FLOAT-OUT. T S BELEVED THAT LOCATON FOR ROLL-OUT AT, M SYSTEM (TYP.) PER 3 THE ROADWAY DECK CONSSTS OF 2.5" THCK ASPHALT, 6.5" THCK GRANTE MEAN SEA LEVEL v PER 2 STORAGE YARD (TYP.) [ m[ BLOCK LAYER AND.5" THCK PAVNG SAND LAYER OVER A 6" THCK TMBER EL. -.3 (SEE NOTE 7) DECK. THE CONTRACTOR S ADVSED THAT THE FLOOR SYSTEM AND TRUSS MEMBERS HAVE AREAS OF ADVANCED SECTON LOSS WHCH HAVE SGNFCANTLY _ REDUCED THER LOAD CARRYNG CAPACTY. SEE CONTRACT BOOK APPENDX A. MEAN LOW WATER 4. THE WEGHT OF EACH SECTON OF THE BRDGE TO BE LJFTED BY BARGE FOR EL FLOAT-OUT (TWO TRUSSES, FRAMNG AND SDEWALK) S ESTMATED TO BE APPROXMATELY 22 TONS. THE LOAD AT EACH OF THE TWO PCK PONTS..N..,NN FLOAT-OUT BARGE (TYP.) PER TRUSS S ESTMATED TO BE 6 TONS ON THE EXTEROR TRUSS A2, AND 5 TONS ON THE NTEROR TRUSS B2. T SHOULD BE NOTED THAT THE SUPPORT LOCATONS, LOADS, ETC. ARE BASED ON THE SUGGESTED GENERAL ELEVATON CONSTRUCTON PROCEDURE SHOWN ON THS SHEET. THE CONTRACTOR SHALL DETERMNE AND SUBMT THER PROPOSED PROCEDURE FOR REVEW AND (SPAN 2, TRUSS A2 SHOWN, APPROVAL. TRUSS B2 & SPAN SMLAR) 5. TRUSS MEMBERS HGHLGHTED WTH THCK SOLD LNES ARE SUBJECTED TO SCALE: i" =.-" COMPRESSVE FORCES DURNG FLOAT-OUT. PROR TO LFTNG BY BARGE, MEMBER COMPONENTS (EYEBARS) FOR THESE MEMBERS SHALL BE ADEQUATELY BRACED. THE EYEBARS AT EACH BRACE PONT MAY BE BRACED TOGETHER BY CLAMPNG WTH PLATES AND THREADED RODS, WTH BLOCKNG BETWEEN EYEBARS TO MANTAN EXSTNG SPACE BETWEEN EYEBARS. N ADDTON, THE HGHLGHTED DAGONAL MEMBERS SHALL BE EXTERNALLY BRACED AT MDPONT TO PROVDE A COMPRESSON STRUT PREVENTNG BUCKLNG N THE PLANE OF THE TRUSS. l' lk,ava&v, Mill All. J- ' q PN WY MWAFAL. ' : MEM V,...mr 6. AT THE LFTNG LOCATONS, THE TRUSS VERTCAL MEMBER AND THE PN SHALL p BE ADEQUATELY BLOCKED TO ENSURE FULL LOAD TRANSFER TO THE TRUSS. pl V H 6 W fe <. fl fo 6.-" SECTON TO BE FLOATED OUT BY BARGE (SEE NOTE 4) ' ffh." " f fil SECTON TO BE REMOVED AND DSPOSED PROR TO BARGE FLOAT-OUT Q BRDGE 22.-8" le 22.-8" <.. < i a ' n _ 5:. if 8.-9± CURB TO CURB REMOVE DECK (SEE NOTE 3) it _- f fl - r i SUGGESTED TRUSS SUPPORT LOCATON (TYP.). TRUSS A2 q._ TRUSS 82 r REMOVE AND DSPOSE.L fld L]. ril P SECTON TO BE FLOATED <L Alb OUT BY BARGE (SEE NOTE 4)...,- - J i f 4 i<4 4,-,....ii ' 4.-". el A cor 22.-8" 8'-9"± CURB TO CURB REMOVE DECK (SEE NOTE 3) i JD CD,t_- CD CD r ; o Q TRUSS 82 PN TRUSS A2 = n AFTER LFTNG BY BARGE AND REMOVAL FROM BRDGE STE, ADDTONAL BARGE SECTONS SHALL BE ATTACHED TO THE BARGE AT EACH END OF THE BARGE LENGTH TO ENABLE PCK AT BOTTOM CHORD PANEL PONTS L24 & L29 AT EACH TRUSS PROR TO ROLL-OUT AT THE STORAGE YARD. 8. THE CONTRACTOR SHALL MANTAN THE BARGE LEVEL N BOTH DRECTONS AT ALL TMES BY BALLASTNG THE BARGE AS REQURED. 9. THE CONTRACTOR S NOTFED THAT THE LOWER CHORD MEMBER LL2 N SPAN SOUTH EXTEROR TRUSS (A ZERO FORCE MEMBER) HAS FALLEN NTO THE WATER. N ADDTON, THE CONTRACTOR S CAUTONED THAT OTHER END PANEL LOWER CHORDS LL2, L7L8, L23L24 AND L29L3 OF THE EXTEROR TRUSSES ALSO TYPCALLY EXHBT ADVANCED SECTON LOSSES. THE CONTRACTOR SHALL PROVDE BRACNG BETWEEN THE PANEL PONTS OF THESE LOWER CHORD MEMBERS AS NECESSARY TO MANTAN THE CONFGURATON AND NTEGRTY OF THE TRUSSES. o G. CP at PAUL "ti +.74 W, 4 N r.,' '-' %MA s '4, ' SHEET 8 OF 4 CTY OF BOSTON PUBLC WORKS DEPARTMENT ENGNEERNG DVSON NORTHERN AVENUE BRDGE CONSTRUCTON - PHASE NOTE: ROADWAY DECK AND SDEWALK DECK NOT SHOWN FOR CLARTY. SURVEY BY NONE APPROACH TRUSS SPANS & 2 TYPCAL CROSS SECTON OF APPROACH TRUSS SPAN DRAWN BY JRM REMOVAL 8c RELOCATON SCALE: 4" =.-" CHECKED BY FOP SCALE: AS NOTED DATE: FEB 26 ; i R _ COY ENGNEtR..% '