Replace US Routes 6 and 28 Bridge over Cohasset Narrows
Massachusetts Department of Transportation
This existing US Routes 6 and 28 (Cranberry Highway) bridge built in 1921 was replaced, in the same footprint, with a new structure that was both widened and lengthened.
This section of the Cranberry Highway is one of the main travel routes carrying local traffic between Bourne and Wareham, and experiences a significant increase in traffic during the summer season. The existing five span bridge was replaced entirely with a new three span structure that was lengthened by 30-feet and widened from 40-feet to 71-feet. Sidewalks were upgraded from a single four foot sidewalk on the south side to a six foot sidewalk on each side. Cohasset Narrows is a tidal area with flow in both directions. The gas, sewer, telephone and electric utilities carried on the old bridge were moved to the new bridge. The contract mandated pier construction in the dry using cofferdams with seal slabs.