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Cuyuna Range Underground Mined Extents
The Cuyuna Range Underground Mined Extents polygon shapefile coverage comprises the areal extents of underground mine workings as 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).