Dorchester Avenue over MBTA Red Line, Cabot Yard Spur, and Old Colony Main Line

Work in general consists of replacement of the existing three-span highway bridge with a new, two-span precast reinforced concrete deck panel slab and cast in place closure pours, sidewalks and barriers, on weathering steel multigirder superstructure. A new pile supported abutment will be constructed behind the existing reinforced concrete rigid frame south abutment of the south span, using drilled and driven pipe piles and a reinforced cast-in-place concrete cap. A new pile supported pier will be constructed between the existing granite block south abutment of the north span and the reinforced concrete rigid frame north abutment of the middle span, using drilled and driven pipe piles and a reinforced cast-in-place concrete cap. The existing granite block north abutment of the north span will be reused, and a new precast reinforced concrete cap will be placed on top to support the new superstructure.

Bridge, Demolition.

Division 01 -	General Requirements, Vehicular Access and Parking, Traffic Control, Temporary Barriers and Enclosures.
Division 03 -	Concrete, Concrete Reinforcing, Precast Structural Concrete.
Division 05 -	Metals, Structural Steel Framing, Structural Steel for Bridges, Steel Joist Framing, Steel Joist Girder Framing.
Division 07 -	Thermal and Moisture Protection, Expansion Control.
Division 09 -	Finishes, High-Performance Coatings.
Division 10 -	Specialties, Signage, Traffic Signage.
Division 26 -	Electrical, Exterior Lighting, Lighting Poles and Standards, Roadway Lighting.
Division 31 -	Earthwork, Embankments, Erosion and Sedimentation Controls, Slope Protection, Gabions, Riprap, Special Foundations and Load-Bearing Elements, Driven Piles.
Division 32 -	Exterior Improvements, Bases, Ballasts, and Paving, Flexible Paving, Rigid Paving, Fences and Gates, Retaining Walls.
Division 34 -	Transportation, Bridges.