Encyclopedia Dubuque
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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
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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 were owned by residents of Dubuque.
There were no further articles on the mine.
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Source:
1. "Dubuque Latest Enterprise," The Daily Herald, July 22, 1882, p. 4