 After the weir had been rebuilt in 1871, sluice bays spanned around , similar to the tumbling bays.The footbridges were opened in 1889 and finally the barge lock, the largest lock on the river, was built in 1904–1905.of the extracted gravel was used to raise the level of Cross Deep Ait, a former ait adjacent to Swan Island downstream, to protect it from flooding.