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Iron Mines

Metal Trade, Iron Industry and Trade, Iron Mines and Mining, Excavation, Transportation, Bridges Cleveland Cliffs Iron Co. - Jackson Iron Mine looking north #5 bridge. [A wooden bridge runs through a tunnel in a wall of rock.]

Scanned: August 24, 2006


Phoenix Mine

Persons, Transportation, Bridges, Metal Trade, Copper Industry and Trade, Copper Mines and Mining [View of mining operations at Phoenix. Several people are shown walking on a bridge that crosses a gully.]

Scanned: December 14, 2010


Portage Bridge

Historic Sites, Historic Districts, Transportation, Bridges, Metal Trade, Copper Industry and Trade, Copper Mines and Mining Old Houghton-Hancock bridge. [Image was taken in Houghton, Hancock can be seen on the opposite side of the canal; the smelting works in Hancock is seen predominantly.]

Scanned: May 17, 2013