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Estimated cost: | Commencement: | December 28, 1995
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Completion date: | December 11, 2003
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Location: | Boston, MA United States |
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Technical data: | Road tunnel, 4 lanes, L = 3,940 ft (1200 m). Design of a mined solution to the engineers cut & cover tunnel design using NATM with various pre-support and groundwater cut-off measures, including barrel vaulting and cut-off walls. |
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Geology description: | Glacial till (cohesive and granular) and weathered to unweathered argillite bedrock. Geology Type: Hard Rock |
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Barrel Vault Method