It was made navigable to the Swiss town of Rheineck.
Later, the lower reaches of the Don were made navigable, but boats could still not reach Sheffield.
The stretch is made navigable by the use of locks and weirs.
In the years 1908 to 1918 the river was regulated by four barrages with locks and thus made navigable for larger inland ships.
The river was made navigable by the erection of the dam and creation of locks in 1871.
Towards the beginning of the 17th century it was made navigable for large ships.
In the middle of the 18th century the river was made navigable from Halesworth to Southwold.
Spalding is an important railway centre, while the river has been made navigable to the town for vessels of from 50 to 70 tons.
As of 2011 it was made navigable.
The River Douglas passes to the east and was made navigable in 1727.