dryfj.com / drycyclist.com

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This shaft at the mine site has concrete walls Old concrete foundations for somethingThumbnailsCan dump at the mine site at the end of the middle fork of Globe Mine RoadOld concrete foundations for somethingThumbnailsCan dump at the mine site at the end of the middle fork of Globe Mine RoadOld concrete foundations for somethingThumbnailsCan dump at the mine site at the end of the middle fork of Globe Mine RoadOld concrete foundations for somethingThumbnailsCan dump at the mine site at the end of the middle fork of Globe Mine RoadOld concrete foundations for somethingThumbnailsCan dump at the mine site at the end of the middle fork of Globe Mine Road

I'm guessing, due to the poured concrete walls, that this shaft might have been bored later than the other holes in the ground here.