 One of the projects to this end was the construction of the fish passes at Iffezheim and Gambsheim, which was approved in the contract of 4 March 1997.The canal, which is modelled on a torrent, consists of 37 individual basins in a row with a water depth of 1.5 m and a total length of 300 m. The Iffezheim fish pass was inaugurated in 2000, Gambsheim was opened in 2006.The construction of the fish pass in Iffezheim was financed by the two states France and Germany and the RKI GmbH.