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Updated: May 23, 2025
All the electric current to run the hoists and the compressed air to drive the drilling machines and to maintain free circulation of air throughout the workings, comes down that shaft and all the surplus water is pumped up it to the two-thousand-foot level, where it is carried off by the drainage tunnel and a complete system of escape ladders-besides at every level is a hoisting engine and cage to take the workmen up if danger threatens them.
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