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Boston Morton Street BridgeMassDOT announced the installation of the new Morton Street Bridge in Mattapan will begin Friday, August 8.

MassDOT will close the Morton Street Bridge for the final demolition and installation of the new bridge. The bridge will close for the move at 9:00 PM on Friday August 8, and will reopen at or before 5:00 AM Monday August 18. The new bridge structure will be moved into place this weekend.

During the bridge closure period, general traffic and MBTA Bus Routes 21 and 26 will be detoured.  MBTA Fairmount Commuter Rail will operate normally except for late Friday night August 8, when Train Nos. 779, 780, 781, and 782 will be replaced with shuttle buses. A fully accessible pedestrian crossing will be in place while the bridge is closed.

MassDOT’s Highway Division constructed a new single span bridge to replace the structurally deficient bridge carrying Morton Street across the MBTA Commuter Rail Tracks in Mattapan. MassDOT used Accelerated Bridge Construction methods to minimize construction impacts. The new bridge structure has been constructed adjacent to the crossing and will be moved into place in one piece.

MassDOT also used Accelerated Bridge Construction and “heavy lift” methods in 2012 to replace the River Street Bridge crossing over the MBTA and CSX railroad tracks in Hyde Park, in addition to previous “heavy lift” bridge projects in Phillipston and Wellesley. During the work, heavy-lifting machines called Self-Propelled Modular Transporters lift the new superstructure from its supports to its final destination and lower it into position.

For more information, visit the Morton Street Bridge Project website: http://www.massdot.state.ma.us/highway/HighlightedProjects/MortonStreetBridge.aspx

 

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