 Construction included cutting a new channel over 1,000 yards long for the River Calder south of the original, levelling of the site with over 1 million cubic yards of infill, the re-construction and extension of a road bridge at the east end of the site near Horbury Bridge, the construction of three railway bridges over the River Calder, and diversion of gas and electricity mains.The new yard was built as a hump shunting (gravity) yard capable of handling 4,000 wagons a day.The reception sidings were built west of the River Calder, the main yard was built on the extended site of the former sidings.