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TBM "Chris" Holes Through W Street Intermediate Shaft on North East Boundary Tunnel

April 16, 2020


The Earth Pressure Balance Tunnel Boring Machine (TBM) “Chris” has reached the W Street shaft, the first and only in-line shaft that the TBM will cross during its 26,700-foot long drive underneath Washington, D.C.

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Posted in the categories Featured Announcements, Lane Press Releases, News.

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