The Orbiel Aqueduct (; ) is one of several aqueducts on the Canal du Midi. Until its building, the canal crossed the River Orbiel on the level. A dam on the Orbiel was demolished and replaced with the Aqueduct. It was built in 1686âÂÂ87 by and designed by Marshal Sebastien Vauban, It is found in the city of Trèbes.