Black River Bridge, Swing bridge in Pocahontas, US.

The Black River Bridge is a swing bridge that crosses the Black River with steel trusses supporting the structure. The central span rotates to allow watercraft to pass beneath while vehicles cross above.

The bridge was constructed in 1934 during a period of infrastructure development in the region. It reflects how engineers solved the challenge of accommodating both road and river traffic at the same location.

The bridge's name comes from the Black River it crosses at Pocahontas, the seat of Randolph County. The 1934 northern span was recorded in the Historic American Engineering Record (No. AR-8) with five photos and 23 data pages, documenting its Parker trusses and Warren swing span before demolition began in 2016.

US 67 traffic, including the Future I-57 corridor, crosses on the 1986 southern steel girder span; the 1934 northern span was demolished from 2016 and delisted in 2018. The swing section no longer turns, so no opening waits for river craft. The Historic American Engineering Record No. AR-8 documentation, with five photos and 23 data pages, records the old structure.

The 1934 northern span was one of only three surviving swing bridges in Arkansas when it was documented. Its Warren swing span sat between two Parker trusses, and the whole structure measured 1,255 feet (383 m). Demolition of that span began in 2016, and it was removed from the National Register in 2018.