The Algebuckina Bridge is a Victorian era railway bridge in the Australian state of South Australia located about 55 kilometres (34 mi) south-east of the town of Oodnadatta in the locality of Allandale Station on the route of the now-closed Central Australia Railway.^[1][2] It opened in January 1892.^[3][4][5] It was the longest bridge in South Australia^[3][5] until construction of the Seaford suburban rail line across the Onkaparinga River south of Adelaide in 2014.^[6]

The 1,927 feet (587 m)^[2] bridge consists of 19 spans^[2] of 100 feet (30 m) length and which are of lattice wrought iron construction,^[2][3] sitting on cast iron cylindrical piers.^[2] It was strengthened in 1926 to allow it to carry heavier trains.^[5]

It was built by a team of around 350 men, working in extreme desert heat.^[3] Several graves are nearby, and one of them is for David Saunders, who died in January 1890 from “heart disease accelerated by heat apoplexy.”^[3][7]

The bridge crosses the floodplain of the Neales River,^[5] which is prone to seasonal flooding, and replaced a surface-level railway which was frequently washed away.^[3] After a severe flood in 1974, which almost reached the bridge decks, the line was closed in 1981 and a new route built 100 miles further west.^[3]

The bridge was listed on the now-defunct Register of the National Estate^[2] on 28 September 1982 and listed as a state heritage place on the South Australian Heritage Register on 20 November 1986.^[2][8]