Jackson, Robert W. (Author)
In 1868 the Keystone Bridge Company erected a railroad budge across the Mississippi River connecting Dunleith (now East Dubuque), Illinois, and Dubuque, Iowa. The Dunleith and Dubuque Bridge was a crucial link between eastern and western railroad systems and a notable example of post-Civil War bridge-building technology. Four years later, in 1872, the company replaced the original western (Dubuque) approach trestle with seven identical iron spans built to the same general specifications of the main bridge. Three of those spans still exist. Together, they are historically significant and rare artifacts of an important era in the nation's economic and industrial development.
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