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I had a really cool experience yesterday.
Yesterday I got to go into the Kennecott copper mine to move a piece of conveyor. The scale of that place is more than I am able to put into words. It is the worlds largest pit mine at more than 3/4 of a mile deep and two and a half miles across. It is the largest excavation project in the history of the world. The dump trucks have tires that are 12 feet tall and can carry 255 tons of whatever you want to load them with. They have a trailer that they hook up to one of those monsters (with the bed removed) that can carry two D11 Cat bulldozers at the same time.(A Cat D11 is 230,581 lb and the blade is 22 feet wide.) The crusher is so big they use the crawler when they have to move it. The same machine they use to move the space shuttle. Everything in the pit is on such a scale as to make the rest of the world look like a toy model.