The Baltic Mine c.1905

To help show the progress of copper mining in the U.P., I have broken the history of the Copper Country into these categories:
The early boom years 1844 -1850
Post-boom years 1851 -1861
Civil War 1861 -1865
Postwar years 1865 -1880
Expansion period 1880-1900
Twentieth Century 1900-1967

Note: If you are doing additional research into any of the various 400+ mining companies that had operations in the Copper Country from
1844-1967, don't forget to review my "Illustrated Bibliography" section.  You'll find additional material to help in your work.