Browse Subjects

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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


Steel Bridge

Transportation, Bridges, Transportation, Railroads, Metal Trade, Copper Industry and Trade Copper Range Railroad steel bridge. [Image shows a portion of a steel bridge operated by the Copper Range Railroad Company in Houghton, MI.]

Scanned: May 26, 2015