Quote:
Originally Posted by ErVikingo
2013. Saw it first hand (after the fact)
random from the backyard:

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Growing up, several of my friend's and neighbor's dads worked at that mine.
Took a field trip there too, couldn't believe how big it was. Like looking at the grand canyon.
Someone said it would would take an entire shift to drive to the bottom and back one time, not sure if that was exaggerated.
from space: