Project Brief geocomp.com I-93 under MBTA’s Red Line South Station Background & Project Challenges This project involved the construction of a passageway for the northbound barrel of the new Central Artery-Tunnel project beneath the Massachusetts Bay Transportation Authority’s (MBTA) South Station which serves the Red Line subway. The work also involved a 110-ft deep excavation immediately adjacent to Amtrak’s South Station terminus. T

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