The depot and bridge to the east were constructed by the Burlington, Cedar Rapids, and Northern Railroad Co., known as the Rock Island Line. This was the third railroad line in Sioux Falls and was established on October 26, 1886. The depot was built in the Richardsonian Romanesque architectural style, and the building is listed on the National Register of Historic Places. Sioux Falls citizen Thomas H. Brown was instrumental in bringing the Rock Island Line to the community.