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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
  • Complete Backfilling Northeast Retaining Wall to Track Bed Subgrade
    Thursday September 25 – Friday September 26
  • Complete Installation of Southeast Track Under Drain, along Support of Excavation
    Thursday September 25 – Saturday September 27
  • Complete Installation of Southeast AT&T Conduit, along Support of Excavation
    Thursday September 25 – Saturday September 27
  • Complete Backfilling Southeast Retaining Wall to Track Bed Subgrade
    Monday September 29 – Wednesday October 1
  • Form, Reinforce & Place Approach Slabs
    Tuesday September 30 – Friday October 3
    Monday October 6 – Thursday October 9
  • Place Subballast
    Monday September 29 – Wednesday October 1
    Wednesday October 8 – Friday October 10
  • Install Utilities at Retaining Wall Extension
    Monday September 29 – Friday October 3
  • Backfill Retaining Wall Extension to Finish grade
    Monday October 6 – Friday October 10
  • Prep Track Bed for Throw Zone
    Wednesday October 8 – Friday October 10
    Tuesday October 14 – Wednesday October 15
  • Place Bituminous Concrete on New Bridge Deck
    Wednesday October 8 – Friday October 10
  • Install Deck Drain on New Bridge
    Tuesday October 14 – Wednesday October 15
  • Continue Rodent Control Maintenance along Tracks
    Friday October 3

Work Done Requiring Lane Closure with Sidewalk Closure
  • Commence Sewer Laterals and Drainage Installation from Manhole 16 to Manhole 9
    Thursday September 25 – Friday September 26
    Monday September 29 – Friday October 3
    Monday October 6 – Friday October 10
    Tuesday October 14 – Wednesday October 15
Water Street Site, Cambridge
  • Haul Out Soil from Stockpile for Harvard Street Retaining Wall Backfill
    Wednesday October 1 – Friday October 3
    Monday September 22 – Friday September 26

Medford Street, Somerville
Medford St. Detour Details
  • Complete Forming, Reinforcing & Placing Backwalls
    Thursday September 25 – Friday September 26
  • Perform Preparatory Tasks for 10/4-10/5 Full Road Closure for Steel Erection
    Wednesday October 1 - Friday October 3

Work Done Requiring Sidewalk Closure
  • Complete Detailing Bridge Steel in new Girder 6 to Girder 5 Bay
    Thursday September 25 – Friday September 26
    Monday September 29 – Wednesday October 1
  • Paint New Bridge Steel Field Connections
    Tuesday September 30 – Friday October 3
    Monday October 6 – Friday October 10
    Tuesday October 14 – Wednesday October 15
  • Detail Bridge Steel in new Girder 1 to Girder 2 Bay
    Monday October 6 – Friday October 10
    Tuesday October 14 – Wednesday October 15
Work Done Requiring Full Road and Sidewalk Closure
  • Erect Girder 2 to Girder 1 Deck Panels and Girder 1 Girder
    Saturday October 4 - Sunday October 5 - WEEKEND CLOSURE


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