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Historic Mines & Mining Companies: Find a Mining Company

Company Records

Incorporations, Colorado:

  • 1861-1875 -- Colorado State Archives
  • 1876-1977 -- Public Records Archives, State of Colorado. There may be a fee for requests.
  • 1977-1990 -- Corporation Division, Secretary of the State of Colorado.
  • 1990-present -- Securities Division, State of Colorado

Mining Claims

County (varies) assessors' offices; archives for historical county mining claim documentations.