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Cuyuna Range Underground Mines
The Cuyuna Range Underground Mines polygon shapefile coverage comprises the shafts, drifts and mined extents digitized from found and geo-rectified surface and level maps of the Cuyuna Range underground natural iron ore mines (Not all levels of the Armour No. 1, Armour No. 2, and Croft mines were digitized (drifts and mined extents)).