Calumet & Hecla Consolidated Copper Company
The Calumet and Hecla Mining Company was a copper-mining company based Michigan's upper peninsula.
| Links | https://en.wikipedia.org/wiki/Calumet_and_Hecla_Mining_Company |
Photo Credit 1
 | Boom Copper (The Story of the First U.S. Mining Boom) | Hardback |
Added by kitchi-gummi