The aqueduct was designed by civil engineer Thomas Telford for the Ellesmere Canal. The resident engineer was M. Davidson who also acted as resident engineer on a number of Telford's other works. The foundation stone was laid on 17 June 1796 and it was completed in 1801. This is an amazingly short time. It has taken our local town council 2 years already to 'improve' the roads around the local station.

The viaduct was designed by Henry Robertson, chief engineer of the Shrewsbury and Chester Railway, to carry the railway line across the meadows of the Vale of Ceiriog between Chirk and Chirk Bank partly in both Wales and England. The England–Wales border bisects the structure at an approximately 45° angle from south-west to north-east. It was built between 1846 and 1848, by Thomas Brassey, with it also undergoing a partial rebuilding in 1858–1859.

Courtesy of en.wikipedia.org/wiki/Chirk_Aqueduct