Mesabi Range Documented Mine Shafts

The Mesabi Range Documented Mine Shafts coverage is a point shapefile conprising detailed information on documented natural iron ore mine shafts on the Mesabi Iron Range. Shafts are vertical or inclined passages from ground surface to underground orebodies that allow access/egress of people and materials and provide for mine ventilation and dewatering.

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Last Updated September 28, 2018, 19:35
Created September 28, 2018, 19:34