This articles discusses the construction and the completion of the oldest mill-dam across the Iowa River in Iowa City, IA. There is an indication that the article is "to be continued," but there does not seem to be a continuation.
Material in the public domain. No restrictions on use.
Huff, S. W. "The Oldest Mill-Dam Across the Iowa River." The Annals of Iowa 1869 (1869), 191-193.
Available at: http://ir.uiowa.edu/annals-of-iowa/vol1869/iss2/10