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MBTA Begins Retaining Wall Repair at Porter Square

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The MBTA is preparing to begin work near the Porter Square Station. The purpose of this work is to repair the retaining wall along the Porter Square Station. The retaining wall is located along the sidewalk on Somerville Ave, and spans from Somerville to the Cambridge City line. This work will be performed by the MBTA and is scheduled to begin mid-September 2020.

The schedule for this project is:

September 8 (Tuesday) Northeast Traffic to install signage. 

September 9 (Wednesday): Line striping to be completed by Mark-A-Lot

September 10 (Thursday): SPS Mobilization Activities

September 11 (Friday): SPS Mobilization Activities

Week of September 14: Select Demo to begin demolition.

Week of September 21: Select Demo to continue demolition and conclude operations by 9/25/2020.

Week of September 27: Demolition completes and GTR implements vibration monitoring. 

Week of October 4: GTR implements vibration monitoring.

Week of October 11:  Keller NA mobilizes for sheet pile driving operation.

Week of October 19: Excavation of existing material to be removed from site.

For questions about the project please contact Ted Banks, MBTA Senior Project Manager, at / Melissa Miguel, Cambridge DPW Supervising Engineer at / or Brian Postlewaite, Somerville Assistant Director of Engineering at

Page was posted on 7/30/2020 11:28 AM
Page was last modified on 10/5/2020 5:14 PM
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