This large tied arch bridge carries US-77 across the Missouri River between Nebraska and Iowa on the north side of Sioux City, Iowa. In addition to the main arch span, the bridge has 7 steel girder approach span. A tied arch bridge gets its name from the horizontal tie girders that connect the ends of the arches on each side of the bridge. The tie girders keep the arch from spreading out wider, allowing the bridge to be supported by relatively small piers.
The original bridge at this location was known as the Combination Bridge because it supported both railroad and highway traffic. The Combination Bridge opened on January 21, 1896 as a toll bridge. The tolls were eliminated on February 8, 1951. The Combination Bridge was imploded on February 23, 1981 shortly after the Siouxland Veterans Memorial Bridge was initially opened. The new bridge opened to two lanes on January 15, 1981, and was fully opened to 4 lanes of traffic on July 22, 1981.