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Fenway Portal Project

Updated on January 9, 2019

A Green Line train passes through the Fenway Portal.

About the Project

Timeline: 2018-2019
Status: Construction

This project will involve the construction of flood control measures at the entrance to the Green Line subway tunnel adjacent to Fenway Station. Large steel doors will be installed at the entrance to the Green Line tunnel to protect the subway from potential future flooding.


Flooding at the Fenway Portal has been a significant issue for the MBTA since Green Line D-branch service began in 1959.

When the Muddy River overflowed its banks in 1996, the resultant floodwaters filled the Green Line subway tunnel and extended up to Arlington Station. The flood caused almost $70 million in damage, and Green Line service was shut down for almost a week until an estimated 40 million gallons of water were pumped out of the affected area.

Learn about the U.S. Army Corps of Engineers' Muddy River project


  • Prevention of future flooding of the Green Line
  • Construction of flood control measures that can be implemented rapidly
  • Provision of flood monitoring equipment to provide the MBTA with adequate advance notice of potential flood events
  • Provisions that will enable rapid return of Green Line service should flood control measures be activated

Project Features

  • Construction of flood barrier doors and gates at the entrance to the subway
  • Construction of an updated pumping station at the tunnel entrance
  • Installation of cameras along the Muddy River to monitor water levels during flooding


  • Protection of the subway from future flood events that can interrupt Green Line service

Service Alerts

Construction of flood prevention measures will occur over a 16-month period. To minimize disruptions to the Green Line, most work will take place during 14 weekends spread out over the project duration.

A limited amount of work will also be performed during weeknights after Green Line service ends.

During weekend construction work, the Green Line D branch service will be shut down and replaced by bus shuttles.

Check Green Line D alerts

Featured Photos


January 11, 2019

Fenway Portal Construction Activities

Follow the construction schedule of the MBTA's contractor, Bond Brothers Inc.

January 9, 2019

Green Line D Bus Shuttles, January - March 2019

Bus shuttles will replace Green Line D service between Kenmore and Reservoir during most weekends, January 5 – March 24.

Contact Information

For all queries and comments related to Fenway Portal Project, please contact: