The Marion Memorial Bridge is a decommissioned 4-span metal truss bridge which formerly carried U.S. Route 41 in Marion County, Tennessee. It was built in 1929. The main span is 369 feet, and the bridge has a total length of 1870 feet. The bridge is historic, and the Marion Memorial Bridge was listed on the National Register of Historic Places on October 25, 2007. The bridge features an unusual truss configuration that is a hybrid of the Pratt and K-Truss configurations. This bridge crosses the Tennessee River and Nickajack Lake. The bridge was replaced by a new concrete and box girder span which opened in November 2014, slightly delayed from its original completion date of August 2013 by conditions encountered in the construction of the replacement bridge footings.