It was built between 1776 and 1780 to a design by Scottish architect and engineer Alexander Stevens.

[1] It carried the A68 over the Tweed until 1974 when it was replaced by a box girder bridge to the east, engineered by Sir Alexander Gibb & Partners.

[2] The rounded cutwaters are carried up to the level of the roadway and are topped with angular pedestrian refuges.

[2] Hollow spandrels reduce the weight of the structure, an innovation by Thomas Telford.

[1] It is near to the Roman settlement of Trimontium (‘three hills’ in Latin), which is to the south-west of the viaduct.