Tags: Canal.
The Aire and Calder Navigation is a river and canal system of the River Aire and the River Calder in the metropolitan county of West Yorkshire England. The first improvements to the rivers above Knottingley were completed in 1704 when the Aire was made navigable to Leeds and the Calder to Wakefield by the construction of 16 locks. Lock sizes were increased several times as was the depth of water to enable larger boats to use the system.
