|Carries||A707 public road|
|Heritage status||Category A listed|
|Total length||146 feet (45 m)|
|No. of spans||3|
|Clearance below||22 feet (6.7 m)|
It was built in around 1764, with William Mylne acting as both designer and contractor. Its construction was authorised by an Act of Parliament obtained in 1764, for 12 miles (19 km) of road that would cost 6560l, including the "substantial" bridge at Fairnilee.
The bridge was substantially rebuilt between 1987 and 1988, with the addition of reinforcing concrete.
It has three arches of 42 feet (13 m) span, and is 22 feet (6.7 m) clear over the river. The total length of the bridge is 146 feet (45 m). The width between the parapets is 13 feet 9 inches (4.19 m), but the cutwaters are carried up to form semi-hexagonal pedestrian refuges. The piers and abutments are made from block masonry, and the rest of the structure is made from rubble.
- Skempton, A. W. (2002). A Biographical Dictionary of Civil Engineers in Great Britain and Ireland: 1500-1830. Thomas Telford. p. 473. ISBN 978-0-7277-2939-2.
- Douglas, Robert (1798). General View of the Agriculture of the Counties of Roxburgh and Selkirk; with Observations on the Means of Its Improvement. Richard Phillips. p. 322.
- "Yair Bridge (Ref: 1901)". historic-scotland.gov.uk. Retrieved 16 March 2015.
- "Yair Bridge". rcahms.gov.uk. Retrieved 16 March 2015.
- Google (16 March 2015). "Yair Bridge" (Map). Google Maps. Google. Retrieved 16 March 2015.
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