Underground Rock Quarry (Joliet, Illinois)

USA / Illinois / Rockdale / Joliet, Illinois
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The rock is partially crushed underground, carried out by conveyor belt, sorted out into sizes and shipped. The high rock walls of the old surface pit can still be seen. This is not the only such operation in the Chicago area. I was in one in North-East Chicago a while ago.
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Coordinates:   41°30'4"N   88°8'31"W
This article was last modified 15 years ago