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Massachusetts Bay Transportation Authority (MBTA) Massachusetts Department of Transportation
Green Line Extension Green Line Extension
Construction Schedule
Phase 1
  

 

Phase 1 Project Description

Harvard Street, Medford
  • Continue Backfill of Southeast Retaining Wall and Detension Tiebacks, along Support of Excavation
    Thursday September 4 - Saturday September 6
    Monday September 8 - Friday September 12
    Monday September 15 - Friday September 19
    Monday September 22 - Wednesday September 24
  • Commence Installation of Track Under Drain, along Support of Excavation
    Monday September 8 - Friday September 12
    Monday September 15 - Friday September 19
  • Commence Installation of AT&T Conduit, along Support of Excavation
    Monday September 15 - Friday September 19
    Monday September 22 - Wednesday September 24
  • Continue Backfilling Northeast Retaining Wall and Detension Tiebacks, along Support of Excavation
    Thursday September 4 - Saturday September 6
    Monday September 8 - Friday September 12
    Monday September 15 - Friday September 19
    Monday September 22 - Wednesday September 24
  • Continue Rodent Control Maintenance along Tracks
    Friday September 5
    Friday September 19

Work Done Requiring Lane Closure with Sidewalk Closure
  • Apply Bridge Deck Waterproofing at New Bridge
    Monday September 8 - Tuesday September 9
  • Commence Drainage Installation from Manhole 16 to Manhole 9
    Monday September 8 - Friday September 12
    Monday September 22 - Wednesday September 24

Water Street Site, Cambridge

No Current Work


Medford Street, Somerville

Medford St. Detour Details

  • Perform Preparatory Tasks for 9/13-9/14 Full Road Closure for Steel Erection
    Wednesday September 10 - Friday September 12
  • Videotaping of Existing Sewer Line Under Medford Street Bridge at Request of MWRA prior to Steel Erection
    Friday September 12 - EARLY MORNING WORK 2AM - 5AM

Work Done Requiring Lane Closure with Sidewalk Closure
  • Retrofit Girder 5 and Girder 2 for New Steel and Remove & Replace Girder 2 Foot Beam Clips in Medford Street
    Wednesday September 10 - Friday September 12

Work Done Requiring Sidewalk Closure
  • Drill, Form, Reinforce and Place Abutment Seat Concrete along Sidewalk
    Thursday September 4 - Friday September 5
    Monday September 8
  • Install Bridge Bearings, along Sidewalk
    Tuesday September 9 - Wednesday September 10
  • Detail Bridge Steel in new Girder 6 Bay
    Monday September 15 - Friday September 19
    Monday September 22 - Wednesday September 24

Work Done Requiring Full Road and Sidewalk Closure
  • Erect Girder 5 to Girder 6 Deck Panels and Girder 6 Girder
    Saturday September 13 - Sunday September 14 - WEEKEND CLOSURE



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