Hargrove Pivot Bridge, also known as Old Hargrove Bridge is a historic swing bridge located at Poplar Bluff, Butler County, Missouri. It crosses the Black River. It was built in 1917, and is 220 feet (67 m) long with a turning span of 100 feet (30 m). This bridge has a modified Wichert truss as its center span and a modified Warren pony truss extending on each side of the center truss. The bridge has not been turned since 1942 due to the lack of river traffic in the area.[2]: 2