Netham Lock is the point at Netham in Bristol at which boats from the River Avon, gain access to Bristol's Floating Harbour. Construction started in 1804 to build the tidal New Cut, where it is joined by the River Malago, and divert the Avon along the Feeder Canal to the harbour; a system designed and built by William Jessop and later improved by Isambard Kingdom Brunel.[28] A weir carries the river into the New Cut and boats use the adjacent lock.