William Jessop Biography and Timeline

Floating Harbour Scheme Gains Backing

Bristol merchants approved a plan to hold harbour water at a navigable level despite large tidal changes. This altered the relationship between the river and urban buildings.

Floating Harbour Scheme Accepted

Bristol merchants commissioned engineer William Jessop to plan a harbour that would remain navigable despite the River Avon tidal range.

Avon New Cut Bypass Excavation

Construction diverted tidal flow into a new southern channel so the central harbour could retain a stable water level. It changed the balance between navigation and flood control.

Bristol Floating Harbour Construction Starts

Works began on the major harbour improvement engineered by William Jessop after parliamentary authorisation. The improvement addressed a specific constraint in river engineering.

New Cut Excavations Commence

Work began on diverting the River Avon through the New Cut so that the original harbour channel could retain a stable water level.

Cumberland Basin Lock System Planned

The harbour design provided controlled lock access between tidal waters and an impounded inner basin. The work illustrates changing priorities in urban hydraulic engineering.

Cumberland Basin Excavation Progresses

Jessop supervised construction of Cumberland Basin to connect the proposed impounded harbour with the tidal river through entrance locks.

Harbour Impoundment Embankments Built

Embankments and river barriers separated the intended floating harbour from the tidal Avon. Its consequences survived in the location of streets and waterside infrastructure.

Hotwells Junction Lock Developed

The dock engineers constructed the connection between Cumberland Basin and the impounded Floating Harbour at Hotwells.

Scouring Strategy Targets Harbour Silt

Engineering proposals used the diverted river and controlled flows to address the sediment that hampered shipping. The project reduced a particular obstacle to waterfront development.

Floating Harbour Completed

Jessop's Floating Harbour works improve Bristol's port.

Role range: 1804-1809

Floating Harbour Is Commissioned

Bristol's impounded harbour opened and significantly reduced reliance on tidal windows for loading ships. This changed how vessels navigated or goods reached Bristol quays.

Frome Enters Impounded Port System

The city's historic Frome harbour became incorporated into the stable water levels of the new floating harbour. Its legacy can be traced in the layout of the city waterfront.

Floating Harbour Navigation Established

The completed Floating Harbour enabled vessels to stay afloat in Bristol without settling on the riverbed at low tide.

River Avon Diverted Into New Cut

Jessop's dock works established a bypass channel for the tidal Avon south of the historic city harbour.

Cumberland Entrance Locks Commissioned

The new entrance locks allowed vessels to move between tidal water and the sheltered dock basin.

Stable Dock Water Levels Achieved

The impounded dock system reduced the disruption to shipping caused by Bristol's unusually large tidal range.