GLX construction activities and traffic updates

March 15 – April 4, 2020, construction outlook and upcoming plans. Work schedule is subject to change based on weather or other factors.

Table of Contents

Union Square Station

Overview of work in the area: Approximately 1,500 feet of wall stretching from the Prospect Street Bridge and running along the train tracks to the Medford Street Bridge (Behind Target) will be installed. Construction of the wall involves vibrating vertical metal sheets into the ground approximately 15 feet in depth. The sheets interlock with one-another forming a structurally sound retaining wall.

Work Schedule: Monday – Friday, with frequent weekends and nights.

Work Planned for the next few weeks: Union Square Station construction continues to advance. The station foundation continues to take shape while underground utilities to support the station are set in place. Sheet-pile driving continues to make its’ way behind the Target shopping center on Somerville Ave. The steel sheet-piles support the earth beneath the existing commuter line tracks and also help to control drainage.

Night Work: None planned.

Lechmere Station

Overview of current work in the area: Besides building a new Lechmere Station on the north side of Monsignor O'Brien Highway, work in this area includes removing and reconstructing an elevated viaduct that will connect to the existing structure running along Charles River Dam Road. After the Lechmere Station stop, the viaduct continues behind buildings along O'Brien Highway until it splits, with one leg heading to Union Square and the other north to the future East Somerville Station and beyond.

Work Schedule: Monday - Friday, 7 a.m. to 4 p.m. and frequent nights and weekends

Work Planned for the next few weeks: Foundation construction for the new viaduct along Monsignor O’Brien Highway continues directly underneath the old structure. Steel placement on the new viaduct continues to advance northward at the site of the future Lechmere station. Foundation work continues over North First St. and will progress toward Water St. In the remainder of the viaduct area and around the MBTA Boston Engine Terminal, pier cap construction, steel placement and deck construction work are progressing throughout the area.

Pipe pile driving will be working its way from the BET toward the Brickbottom Condominums. This heavy hammering will only be performed during daytime operations.

Night Work: Yes. Expect moderate construction noise primarily due to movement of heavy machinery and deck construction on the viaduct. Contractors will make efforts to direct lighting away from residential buildings.

Vehicle Maintenance Facility (3rd Ave)

Overview of current work in the area: Construction is well underway for the buildings that make up the future Green Line Vehicle Maintenance Facility. A retaining wall is being built that encompasses the entire area footprint. Installation of new drainage and the retaining walls are near completion and soon the buildings will begin to take shape.

Work Schedule: Monday - Friday, 7 a.m. to 4 p.m. with regular weekend & night work.

Work Planned for the next few weeks: At the Vehicle Maintenance Facility, foundation work continues especially in the middle of the structure where hoist pits and other train maintenance structures are going into place. Foundations for posts that will hold the catenary line have been drilled leading into and out of the facility. This work will continue as will the installation of posts that will be set into concrete.

The roof is now on the Transportation Building which will become the operations center for GLX. Utilities continue to be placed in the building and steel siding is beginning to be installed.

Night work: Yes. Expect some construction activities nightly in this exceptionally busy area.

East Somerville Station (Fitchburg St. to Walnut St.)

Overview of current work in the area: Both commuter line tracks have been shifted to their permanent position on the east side of the alignment. Work is now underway on the west side of the rail right-of-way. The demolition of the second half of the Washington St. rail overpass is complete. Installation of new bridge abutments, drainage, and constructing of retaining walls will continue for the next several weeks.

Work Schedule: Monday - Friday, 7 a.m. to 4 p.m. with weekends & frequent nights

Work Planned for the next few weeks: At the Washington Street Bridge, foundation work on both sides of the rail bridge continues as does the removal of debris from the old structure. Further north between Cross St. and McGrath Hwy., retaining wall construction continues to progress as drilling and steel H-pile placement continues along the hillside.

Night Work: Yes. Expect usage of the yellow Multipurpose machine in this area as materials are brought in to support area operations.

Gilman Square Station (Walnut St. to Central St.)

Overview of current work in the area: The GLX Project continues to work closely with the Somerville High School construction team near the future Gilman Square Station. Currently, work consists of building a Traction Power Substation near the Medford St. Bridge and building of a new retaining wall on the high school side of the tracks.

Work Schedule: Monday - Friday, 7 a.m. to 4 p.m. with weekends and night work during this period.

Work Planned for the next few weeks: The weekend closure of the School Street Bridge, near Somerville City Hall, scheduled to begin at midnight on Friday, March 20, has been extended by one week. The roadway closure will go into effect as planned Friday night, however, the duration of the closure has been extended through Sunday, March 29, 2020. Additionally, to take advantage of a traditional decrease in vehicular travel, the School Street Bridge will also close for the week of school vacation, April 20 through April 24.

Work continues on the large retaining wall behind Somerville High School as construction personnel install tie-backs through the steel posts and embed them into the hillside. These tie-backs provide extra stability for the retaining wall system.

Workers continue to prepare the Medford St. bridge for impending modifications that will allow for an additional track to be placed beneath the bridge.

North of School St., track personnel are preparing the track bed to move both commuter line tracks into their permanent location on the east side of the rail corridor.

Night work: Yes. Expect night work especially in support of the commuter line track shift. Construction lighting will be in use and noise levels from work may be disruptive at times.

Please note that a construction train used for excavation and hauling of materials will be active throughout the nights and weekend. This heavy piece of equipment, which is regulated by the Federal Railroad Administration, is required to use its horn for safety purposes whenever it stops and starts.

Magoun Square Station (Central to Cedar)

Overview of work in the area: While Installing new drainage and building walls (both retaining and noise walls) have been the main activities in this area throughout 2019, the current emphasis is on getting the commuter rail shifted to the east side of the alignment. Later in the year we will also start placing sound wall panels on the eastern side of the project both here and along the rest of the alignment.

Work Schedule: Monday - Friday, 7 a.m. to 4 p.m. and nights and weekends

Work Planned for the next few weeks: All work is focused on getting the commuter line moved to the east side of the alignment in this area. Expect ballast stone deliveries, track placement and specialty track in use throughout this area day and night. The shift of both the inbound and outbound is expected to take place in the next few weeks.

Night Work: Yes. Expect night work especially in support of the commuter line track shift. Construction lighting will be in use and noise levels from work may be disruptive at times.

Please note that a construction train used for excavation and hauling of materials will be active throughout the nights and weekend. This heavy piece of equipment, which is regulated by the Federal Railroad Administration, is required to use its horn for safety purposes whenever it stops and starts.

Ball Square Station (Cedar St. to Harvard St.)

Overview of work in the area: Construction of a longer span Broadway Bridge is the most visible work near the future Ball Square Station. In addition, foundation work is nearly complete at the Traction Power Substation building situated now under construction in front of the future Ball Square Station platform along Boston Avenue. Other work in the areas include:

  • Stabilizing the soil on both sides of the bridge to support the subsequent phases of bridge construction.
  • Drilling shafts and building the abutments that will support the new Broadway Bridge
  • Developing footprint of future Ball Square Station
  • Noise wall construction between Cedar St. and Broadway
  • Small section of noise wall construction north of Broadway and connecting to existing wall at Granville Ave.
  • Install deep drainage system
  • Relocation of major utility lines beneath the tracks

Work Schedule: Monday – Sunday, 7 a.m. to 4 p.m. and frequent nights.

Work Planned for the next few weeks: South of the Broadway Bridge, drainage installation continues next to the commuter line tracks as well as north of the tracks between Newburn and Morton Ave. Drainage work in the middle of Granville Ave. wrapped up on March 11 and normal vehicular traffic has been restored that area. Final street restoration will take place at a later date.

At the Broadway Bridge, construction continues on the east, center, and west bridge abutments.

Traction power substation construction is moving forward along Boston Ave. (close to Sphere Luxury Apartments). Expect this structure to take shape in the next several weeks. Also expect additional utility work in the area as the construction team completes key parts of the below-grade work.

Night Work: Yes. Expect night work to continue north and south of the Broadway Bridge from Granville Ave. in Medford to Cedar Street in Somerville as crews advance foundations, walls, and utility relocation to prepare for the commuter rail track shift over to its permanent location. During this work, contractors will make efforts to minimize noise, however, noise levels may be disruptive at times. Efforts will be made to minimize light spillage into residential areas.

Please note that a construction train used for excavation and hauling of materials will be active throughout the nights and weekend. This heavy piece of equipment, which is regulated by the Federal Railroad Administration, is required to use its horn for safety purposes whenever it stops and starts.

Medford/Tufts Station (Harvard St. to Winthrop St.)

Overview of work in the area: With the commuter rail track moved to its final position on the east side of the corridor, work is now focused on the west side walls and station.

Work Schedule: Monday - Friday, 7 a.m. to 4 p.m. and frequent weekends and nights

Work Planned for the next few weeks: Drilling and placing piles for the retaining wall on the west side of the alignment continues. Crews are making their way north of the bridge as they continue along Boston Ave. This period, work crews will engage in the leveling of newly installed track. Machinery involved in this process is a leveling device which rides slowly along the rails while making fine-tuned adjustments to the track grade and alignment. Generally speaking, track leveling is not considered a high noise activity, however, occasionally, trucks supporting the leveling process may trigger audible back-up alarms.

Night Work: Yes. Expect some activity specifically as the yellow multi-purpose machine (MPM) stages in this area prior to moving toward Ball Square to support night operations. The MPM (a long piece of heavy construction machinery on rail cars) must clear the switch just south of College Ave. Once it is on the correct track to support construction further down the alignment, it often may idle for periods of time.

Contact

Phone

Construction Hotline (855) 459-4636

24/7 Coverage

Online

Green Line Extension inquiries info@glxinfo.com

Address

200 Inner Belt Road
Somerville, MA 02143
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