Excerpt from Cassier’s Magazine, Vol. 29: Engineering Illustrated; November, 1905 April, 1906
Probably no other active blast fur nace is located so close to an enor mous deposit of rich iron ore as that at Durango. The management te port that the average cost of placing one ton of 60 per cent. Iron ore in the furnace is about 35 cents. Mexi can money. This Cerro de Mercado is fully one mile long, about one-third of a mile wide, and its battlements of ore range from 400 to 650 feet above the level of the works.
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