The Saar was very important for the Saarland coal, iron and steel industries.
Raw materials and finished products were shipped on it by water via the Canal des houillères de la Sarre, the Marne-Rhine Canal and the Rhine, for instance, to the Ruhr area or the port of Rotterdam.

The lowermost 87.2 km (54.2 mi) section from the confluence of Saar and Moselle at Konz up to the city of Saarbrücken have been upgraded for navigation with Class Vb ships.
The 17.5 km (10.9 mi) section between Saarbrücken and Sarreguemines is navigable for smaller Class I ships.
At Sarreguemines the 64 km (40 mi) Canal de la Sarre (also navigable for Class I ships) connects the Saar with the Marne–Rhine Canal at Gondrexange.
The Saar was very important for the Saarland coal, iron and steel industries. Raw materials and finished products were shipped on it by water via the Canal des houillères de la Sarre, the Marne-Rhine Canal and the Rhine, for instance, to the Ruhr area or the port of Rotterdam.
The lowermost 87.2 km (54.2 mi) section from the confluence of Saar and Moselle at Konz up to the city of Saarbrücken have been upgraded for navigation with Class Vb ships. The 17.5 km (10.9 mi) section between Saarbrücken and Sarreguemines is navigable for smaller Class I ships. At Sarreguemines the 64 km (40 mi) Canal de la Sarre (also navigable for Class I ships) connects the Saar with the Marne–Rhine Canal at Gondrexange.
Saar (river)