Encyclopedia Dubuque
"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
DUBUQUE AND BRECKENRIDGE MINING COMPANY
DUBUQUE AND BRECKENRIDGE MINING COMPANY. Formed in 1882, the company owned land two miles from Breckenridge, Colorado. The vein of ore (unidentified in the article) was eighteen inches thick and assayed at $90 per ton. Most of the stock in the mine was owned by residents of Dubuque.
The Colorado Mine Directory of 1879-1910 indicated activity for a Dubuque mine and the Dubuque Mining Company.
Individual Mine Mining Company Year
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Source:
1. "Dubuque Latest Enterprise," The Daily Herald, July 22, 1882, p. 4