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We will do diamond (core) drilling ahead of the machine, above the machine, and to the side after every 150 m. We will drill and log the core right there while we are drilling it, then interpret the results, so it will be concurrent with boring,” said Dee

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TUNNEL BORING MACHINE Tunnel Boring Machine The tunnel will be excavated by a tunnel boring machine (TBM) to a diameter of 12-1/2 feet. The TBM was assembled at the base of the access Shaft in a short section of tunnel called the "bell out".

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