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Silverline Phase III
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| Service: | Sub-consultant for NATM design.
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| Estimated cost: | Commencement: | January 01, 2003
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Completion date: | January 01, 2008
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| Location: | 500 Arborway Boston, MA 02130 United States |
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| Geology description: | Made ground, peat, glacial till (cohesive, plastic), Boston Blue Clay and sand. |
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| Bid cost: | Final cost: | $550 million USD
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Description
Silver Line Phase III is an underground extension of the Silver Line from the current terminal at South Station into Downtown Boston. The tunnels through Boston's Chinatown lie up to 25m below surface and include ca. 1400m long-running tunnels, two stations and complex underground junctions. The NATM design alternatives for LRT / Busway tunnels are located beneath existing subway stations and running tunnels. 3D modelling tools were utilised to create multiple alignments.
