[1] The canal was surveyed by John Rennie and following a change of route, which resulted in the canal passing through Devizes and hence Semington, rather than Marlborough and Calne, an Act of Parliament was obtained in 1794 to authorise the plan and work began.

The western section through Semington was partially complete by this time, and was finished by 1804, but there were two gaps to be filled.

The canal sweeps to the south to join the valley, and runs along its north bank to reach Semington.

For the canal to head towards Trowbridge, a smaller bend was needed to cross the valley, with an aqueduct to carry it over the brook.

[5] The aqueduct consists of a single stilted segmental arch, mainly constructed of limestone ashlar masonry, although some repairs have been made with engineering bricks.