Inside the Resolution Copper Mine, 1.3 Miles Underground

Inside the Resolution Copper Mine, 1.3 Miles Underground

https://youtube.com/watch?v=N0y4zYMYOrQMar. 14 -- There are deeper mines in North America than the Resolution mine but none with a single shaft this long. It is a 6,943 foot concrete barrel, 30 feet in diameter bored into the mountain of...

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