Drop Shafts

A drop shaft is an underground vertical or inclined passageway. Drop shafts are constructed for a number of reasons, including the ventilation of a tunnel or underground structure, as a drop shaft for a sewerage or a water/service tunnel or for access to a tunnel or underground structure, which can also be used as an escape route.


Shafts can be sunk either dry, or for methods such as the caisson method, they can be sunk using a slurry method. 


Value: $4.65 Million

Indianapolis, Indiana

Value: $1.1 Million

Lafayette, Indiana

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