Quote:
Originally Posted by scott free
Who knows, but someone went through a LOT of trouble to hide whatever it is... considering the era they think it was built in its something of an engineering miracle.
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It's really not. Pretty simple design and execution from the info we have so far. Just need time and labor.
Both the existing main shaft as it sits today, and 10X were likely dug in the same way it was originally dig before filled back in. By hand, raising and lowering buckets.