His structure was opened on 26 August 1805 .
A section of the canal embankment collapsed in January 1806 ; this was repaired , but the aqueduct structure itself collapsed in February 1808 , severing the canal .
His structure was opened on 26 August 1805 , but a section of the canal embankment collapsed in January 1806 ; this was repaired , but the aqueduct structure itself collapsed in February 1808 , severing the canal .