Daniel B. Luten, one of the nation’s most innovative bridge designers of the 20th century, designed the Milwaukee Street Bridge. Constructed in 1930 by Eau Claire Engineering, it was a rare example of a steel-reinforced, three-span, open-spandrel, continuous rib arch bridge. Luten’s national success resulted from his ability to reduce the need for expensive materials while maintaining safety and strength. By 1927, he held nearly 50 patents for bridge designs and other innovations related to concrete construction. The bridge served Watertown residents until its replacement in 2007.