Rock salt mined from an underground mine is piled up at the Detroit Salt Company, the salt is used mainly for high de-icing, Detroit, Michigan, USA

america american an at business company day daylight daytime de de icing detroit during economy exterior exteriors for from heap heaps high icing industrial industry is mainly material materials michigan mine mined mineral minerals minery mines mining natural nobody north of outdoor photo photos pile piled piles production raw refinery resource resources rock salines salt salt saltern shot shots states the underground united up us us american usa used