sentences:  A dam he had built in the previous year for the East India Dock had partially failed after four weeks, but had been repaired.The problem was one of design rather than bad workmanship, and the City Canal dam worked successfully.The canal was completed in 1805 (officially opened on 9 December that year), having incorporated at its western end the Breach Dockyard, a mast and timber laying dock formed around a large linear pond.