Eider Canal Eider Canal The Eider Canal (also called the Schleswig-Holstein Canal) was an artificial waterway in southern Denmark (later northern Germany) which connected the North Sea with the Baltic Sea by way of the rivers Eider and Levensau. Constructed between 1777 and 1784, the Eider Canal was built to create a path for ships entering and exiting the Baltic that was shorter and less storm-prone than navigating around the Jutland peninsula. In the 1880s the canal was replaced by the enlarged Kiel Canal, which includes some of the Eider Canal's watercourse. The canal's watercourse followed the border between the duchies of
North Sea Canal In 1896 the Middle Locks (') were built, followed by the North Locks (") in 1929, which were Europe's largest locks at that time. At the eastern end of the canal, east of Amsterdam, the IJ Bay was open to the Zuiderzee until 1872 when the Orange Locks (") were built. With the completion of these locks the North Sea Canal and IJ Bay were no longer open to the sea and a specific water level could be maintained. The canal was dug using manual labour. The workers lived in horrid conditions, being housed in huts built from twigs, driftwood,