The Dortmund–Ems Canal is a long canal in Germany between the inland port of the city of Dortmund  and the sea port of Emden. The artificial southern part of the canal ends after at Herbrum lock near Meppen. The route then takes the river Ems for to Oldersum lock. From there, the canal continues along a second artificial segment of . This latter section was built because inland ships at the time of the construction of the canal were not built for the open sea, which they would have faced at the Dollart and the entry to the sea port of Emden. It is connected to the Ems-Jade Canal from Emden to Wilhelmshaven.