Maffa Way and Mystic Avenue Superstructure Replacement Design Build Project – Phase 1

Construction of Phase 1 of the Maffa Way and Mystic Avenue Superstructure Replacement Design Build (DB) Project is nearing completion. Construction of Phase 2 is expected to begin this fall with final project completion anticipated in late fall 2025/early winter 2026. The project was advertised by MassDOT in August 2022 and bids from the three shortlisted teams were opened in November. The Skanska/CHA DB team was selected as the Best Value. Following notice to proceed from MassDOT in April 2023, the DB team advanced major design milestones including finalized Bridge Type Selection Worksheets and Sketch Plans, 75% Highway/First Structural, 100%/Second Structural and final Issued for Construction (IFC) plans. The IFC submission was accepted by MassDOT in April 2024, with construction of Phase 1 commencing shortly after. 

The project involves the replacement of both bridge superstructures and rehabilitation of substructures of the two bridges carrying Maffa Way and Mystic Avenue over the MBTA Orange Line, Keolis Commuter Rail, and CSX train tracks. In addition to the bridge work, the project scope involves construction of moment slabs, retaining walls, significant utility relocations, and roadway reconstruction within the project limits. The City of Boston, City of Somerville, and FHWA are collaborating partners for developing and implementing multi-modal accommodations and design decisions.