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Bidding and Solicitations > Design & Construction

Public Announcement of Request for Letters of Interest for Design Build Services for the Green Line Extension Project

Project Description

Contract No. E22CN07

The Project includes the design and construction of two distinct branches that will serve as an extension to the MBTA’s Green Line: a “mainline" branch which will operate within the existing right-of-way of the MBTA Lowell Line, beginning just south of  a relocated Lechmere Station in Cambridge and traveling north to Medford, and a branch line operating within the existing right-of-way of the MBTA Fitchburg Line to Union Square in Somerville.  There will be seven new stations constructed as part of the Project, including the relocated Lechmere Station, as well as associated electrical and signal systems.  A vehicle storage and maintenance facility will also be constructed.

Short-Listed Proposers


  • Fluor Enterprises, Inc
  • The Middlesex Corporation
  • Herzog Contracting Corp.
  • Balfour Beatty Infrastructure, Inc.
  • STV, Incorporated


  • The Lane Construction Corporation        
  • Salini Impregilo, S.p.A     
  • Judlau Contracting, Inc.
  • LMH-C.M.C. di Ravenna Joint Venture, comprised of LM Heavy Civil Construction, LLC and Cooperativa Muratori & Cementisti- C.M.C di Ravenna Societa Cooperativa
  • WSP Parsons Brinckerhoff


  • Walsh Construction Company II, LLC     
  • Barletta Heavy Division, Inc.
  • Granite Construction, Inc.
  • Jacobs Engineering Group Inc.


Request for Letters of Interest for Design Build Services for the Green Line Extension Project  

Report to the MBTA Fiscal and Management Control Board and the MassDOT Board of Directors

Conflict of Interest Guidance

GLX IPMT Master Critical Path Draft

GLX IPMT Master Draft

GLX IPMT Master Draft PDF

List of Letters of Interest Respondents

Request for Information

Organizational Conflict of Interest Precluded Entity List (updated September 26, 2017)

Request for Qualifications

This Request for Qualifications is being posted for Informational Purposes Only. If an entity intends to submit a Statement of Qualifications (SOQ), it must submit a Letter of Interest in accordance with the Request for Letters of Interest prior to submitting the SOQ.

Request for Qualifications (for informational purposes only) 

Addendum No. 1

Clarification No. 1

Addendum No. 2 

Clarification No. 2  

Pre-Procurement Forum November 16, 2016


Forum PowerPoint Slides

GLX Forum Attendees 161116

Final Responses to Pre-Procurement-Related Questions


Final Environmental Impact Report

Environmental Assessment

MassDOT GLX Website