Calder and Hebble Navigation
Improvements on  the River Calder and the River Hebble began in 1759,  The Rochdale Canal  joined it in 1804. This let boats go from Sowerby Bridge to Manchester.   It connects to the  Aire and Calder Navigation at Wakefield.  It joins the  Huddersfield Broad Canal near Mirfield. There were many alterations over the years, so now it is mostly seperate from the river.