sentences:  While this enabled boats to cross the watershed, they still had to use the Garonne to reach the ocean and this presented more problems with floods and groundings as the size of cargo boats increased.It is said that when Pierre-Paul Riquet built the Canal Royal du Languedoc (now known as the Canal du Midi) between Sète and Toulouse from 1667-1681 he envisaged continuing the canal closer to the Atlantic