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MassDOT outlines timeline, property impacts for Sagamore and Bourne bridge replacements

Select Board of Nantucket · December 19, 2025
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Summary

MassDOT told Nantucket officials that the Sagamore Bridge project is fully funded and construction will begin in 2027, with the first new span open to traffic by 2033; the program includes major interchange rebuilds, pedestrian and bicycle facilities and planned acquisitions of private property to accommodate the new twin-span bridges.

Massachusetts Department of Transportation officials presented an update to the Nantucket Select Board and the Nantucket Planning and Economic Development Commission on Jan. 28 about the Cape Cod bridges replacement program, saying it will replace the nearly 90-year-old Sagamore and Bourne bridges with twin spans and rebuilt interchanges.

A MassDOT presenter said the Sagamore Bridge is fully funded through a combination of USDOT grants, U.S. Army Corps of Engineers funds and a state commitment; work on Sagamore is scheduled to begin with a contractor notice to proceed in 2027 and the agency expects the first new span to carry traffic as early as 2033. MassDOT is pursuing additional federal grant funds for the Bourne Bridge and plans to follow Bourne’s work roughly a year after Sagamore, funding dependent.

The project will produce…

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