The Iron Cliffs Mining Company opened the Barnum pit mine near Ishpeming in 1868. The New Barnum underground mine shown here was opened nearby in the early 1880s and later became known as the Cliffs Shaft. The 'Old Barnum' pit closed in 1897. The Cliffs Shaft became one of the Cleveland-Cliffs Iron Company's principle mines. Cleveland-Cliffs Iron Company was formed with the merger of two major iron mining companies on Michigan's Marquette Range in 1891. The Company had a number of mines operating in the Upper Peninsula by the outbreak of World War I. By the 1940s the high grade iron ores mined ...
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