Map of Entire Surface of Isle Royale Copper Company

Object Type: Folder
In Folder: Archives of Michigan Map Collection

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Map of Entire Surface of Isle Royale Copper Company, Page 1

Reproduction of a mining map of Portage Township in Houghton County, Michigan showing the copper mines in 1923. There are hand annotations. The scale on the original is .8 inch equals 2000 feet.

Map of Entire Surface of Isle Royale Copper Company, Page 2

Reproduction of a mining map of Portage Township in Houghton County, Michigan showing the copper mines in 1923. There are hand annotations. The scale on the original is .8 inch equals 2000 feet.

Archives of Michigan https://michigan.gov/archivesofmi