AL Tunnel Practice Questions - Alabama Tunnel Contractor Examination Exam

What is the construction purpose of dewatering around a tunnel or shaft?

To increase the natural groundwater table before mining To lower groundwater and improve stability or reduce inflow so excavation and lining can proceed as designed To classify the heading as gassy To replace ventilation after a blast

Correct Answer:

To lower groundwater and improve stability or reduce inflow so excavation and lining can proceed as designed

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