Richmond Lock and Footbridge

Richmond Lock
Richmond Lock and Footbridge, viewed from near Isleworth, London
51°27′44″N 0°19′02″W / 51.46222°N 0.31722°W / 51.46222; -0.31722
Listed Building – Grade II*
Official name	Richmond Footbridge, Lock and Sluices
Designated	25 May 1983
Reference no.	1250044
Waterway	River Thames
County	Greater London
Maintained by	Port of London Authority
First built	1894
Length	250 feet (76.2 m)
Width	26 feet 8 inches (8.1 m)
Fall	Half tide lock (10 feet (3 m))
Above sea level	2 feet (0.61 m) (maximal low tide below lock) to greater than 20 feet (6.1 m) (usual maximal high tide above lock)

v t e Richmond Lock — the Richmond & Twickenham reach of the Tideway
Legend
River Thames: Kingston reach Teddington Weir Teddington Lock Footbridges moorings rollers Skiff Lock Launch Lock Barge Lock Obelisk marking PLA - EA powers' boundary Ham Lake, Ham Lands Swan Island, Twickenham Radnor House School Eel Pie Island: footbridge hard moorings for deep-draft ferries Ham House and Gardens Marble Hill House and Gardens Glover's Island Star and Garter mansion and Richmond Hill, London A305 Richmond Bridge Skiff, gig moorings, raised pontoon for deep vessels Corporation Island Richmond Railway Bridge A316 Twickenham Bridge Richmond Lock and Footbridge N.B. barrage lifted near and at high tide River Thames

Richmond Lock and Footbridge is a lock, rising and falling low-tide barrage integrating controlled sluices and pair of pedestrian bridges on the River Thames in southwest London, England, and is a Grade II* listed structure.^[1] It is the furthest downstream of the forty-five Thames locks and the only one owned and operated by the Port of London Authority. It was opened in 1894 and is north-west of the centre of Richmond in a semi-urban part of southwest London. Downstream are Syon Park and Kew Gardens on opposite banks. It connects the promenade at Richmond with the neighbouring district of St. Margarets on the west bank during the day and is closed at night to pedestrians – after 19:30 GMT or after 21:30 when BST is in use. At high tide the sluice gates are raised and partly hidden behind metal arches forming twin footbridges.

It was built to maintain the lowest-lying head of water of the forty-five navigable reaches of the Thames above the rest of the Tideway. Below the structure for a few miles, at low tide, the navigable channel is narrow and restricts access for vessels with the greatest draft. The next major point of mooring below the lock is, accordingly, at Brentford Dock.