“Identified during the archaeological survey for the New Mississippi River Bridge project in St. Louis, the John C. Kupferle Foundry site has been determined to be historically significant at the local level. The site has the potential to provide unique information on industry, in particular the development of brass manufacturing in St. Louis during the last quarter of the 19th century. Brass was not widely manufactured in the United States until the second half of the 19th century, and then primarily on the east coast. Kupferle and Boisselier were among the earliest brass foundry operators in St. Louis, and their second foundry at the corner of Mound and N. Second streets typifies the development of the industry in the region.
The Kupferle Foundry partially overlaps the extents of a prehistoric site: Big Mound (23SL3). The earliest detailed account of Big Mound from the 18th century describes it as a ridge mound, 319 feet long and 158 feet wide.” Read More.