Among the various projects where he left his mark were St. Mary's Catholic and the Congregational Churches, both located in central Iowa City near the U of I campus and still in use as of Summer, 2007. Published obituaries and earlier sources report that Struble won the contract to build the 19th century court house of Johnson County (see photo); also that he built or helped build St. Agatha's Catholic seminary (1861), now refurbished as the Berkley apartment building, 130 Jefferson.
Struble left his mark through projects like St. Mary's Catholic and Congregational Churches, both located near the University of Iowa campus; the 19th-century Johnson County Courthouse; and St. Agatha's Catholic seminary, now a renovated apartment complex on Jefferson Street.