Tunneling Machine Lowered Underground

Tunnel Construction
Written By Peter Kent

Video showing a segment of the tunnel boring machine being lowered into a shaft. The cutting head is lowered next as a construction crew oversees the process.

Yesterday, Rachel, our tunnel boring machine (TBM), was lowered in sections about 100 feet below ground using the access shaft in Carson. After being assembled and tested underground, she will start tunneling.

Peter Kent
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