Wrought iron lining-up pin found on the Laigh Milton Viaduct


SKU: 1997/013 Categories: , ,


Wrought iron lining-up pin found on top of arch No.1 of the Laigh Milton Viaduct on the Kilmarnock & Troon Railway. The pin was found on 8 March 1996 set into a joint of the arch.

This object was found during the Laigh Milton Viaduct Conservation Project (1995-1996). The viaduct, believed to be the world’s oldest on a public railway, was the work of leading civil engineer William Jessop. The double-track, horse-operated railway was opened in 1812, mainly for the export of coal, although it soon carried passengers. In 1816 it was the first railway in Scotland to operate with a Stephenson steam locomotive; nine years before the Stockton & Darlington.
Numerous significant railway relics were found during the restoration and this is just one of a number of them donated to ICE Scotland Museum.

For a detailed description of the conservation works click here.

Professor Roland Paxton wrote a paper for the Journal Historical Studies in Civil Engineering of the Japan Society of Civil Engineers. To read the paper click here.

For a general description and images of early cast iron plate railways see

For a film of the restoration works click here.

For an article on the history of the Kilmarnock & Troon Railway written by John Yellowlees in the Scotsman newspaper (dated 25 August 2022) click here.

Additional information

Acquisition Number


Item Type

Short Description

Lining-up pin

Manufactured by

Date of Manufacture

c. 1810



Supporting Items


Makers Number




Dimensions (mm)

Pin: 130 (L). Shaft: 9 x 9. Head (domed): 16 x 16.


Date Donated

December 1977


Wrought iron


Poor to fair (rust damage)

Display Location