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Each year, TBM publishes a tunneling industry outlook by polling a sampling of tunneling professionals. Most agree that demand is high for tunneling.

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Each year, TBM publishes a tunneling industry outlook by polling a sampling of tunneling professionals. Most agree that demand is high for tunneling.

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Abbreviations. DC - Downcast (Air moves down shaft) ems - earnings per manshift - overall (this is the average wage per shift) ebg - elsewhere below ground

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