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Old Windsor Lock
Old Windsor Lock from the upstream side
Waterway	River Thames
County	Berkshire
Maintained by	Environment Agency
Operation	Hydraulic
First built	1822
Latest built	1954
Length	54.55 m (179 ft 0 in)
Width	7.36 m (24 ft 2 in)
Fall	1.74 m (5 ft 9 in)
Above sea level	53
Distance to Teddington Lock	20 miles
Power is available out of hours

v t e Old Windsor Lock
Legend
River Thames moorings site of old mill weir Romney Lock Jubilee River -- (from Boulter's Lock) Black Potts Railway Bridge B470 Victoria Bridge Sumptermead Ait B3021 Albert Bridge Ham Lane bridge Old Windsor Lock River Thames

Old Windsor Lock is a lock on the River Thames in England close to Old Windsor on the side of the river towards the town. The lock marks the start of the New Cut, built in 1822 by the Thames Navigation Commissioners, which created Ham Island in the hook of the old river. The lock connects to Ham Island and there is a footbridge across the lock cut.

There is a small weir beside the lock, but the main weir is some way upstream at the top end of Ham Island.

History

The old name for the site of the lock was "Top of Caps" and the first suggestion for a lock at "Capps" was in 1770. However it was not until 1822 that the lock cut and lock were built. No weir was built at the time, although there was already an obstruction called "Newman's Bucks" at the islands that are now at the top of the lock cut. Of these islands, only that called Lion Island remains. The first lock keeper was dismissed after various demeanors which included digging through the bank of the lock cut and thereby causing the collapse of the new lock cut bridge. The weir was constructed in 1836. In 1868 there was discussion of removing the lock, but instead it was extended with a tumbling bay added. In 1871 the lock cut bridge was rebuilt with the right reserved to lay sewage pipes across it. The lock was rebuilt in 1957.

Access to the lock

The lock is only accessible by foot and can be reached from the end of a long spur road leading to The Manor and The Priory from Old Windsor. Or by Church road then Ham Lane then the towpath. Ham Lane is a private road and only a public foot path not a public road. The bridge is private as is all of Ham Island, no public access.

Reach above the lock

The 0.5-mile (0.80 km) cut, is crossed by Ham Bridge from the rest of Old Windsor to Ham Island. Much smaller Lion Island is at the top where the flows split. Then Albert Bridge crosses to Datchet including at its lowest point, the thin island of Sumptermead Ait. On the Windsor side (right bank), the river winds round farmland at Princes Consort farm and Windsor Castle Home Park. There follows Victoria Bridge connecting the upper end of Datchet then a golf course, followed by Black Potts Railway Bridge. The railway bridge has a great brick pier in Black Potts Ait, behind which the Jubilee River rejoins the Thames. The left bank becomes playing fields of Eton College. The area known as Black Potts up to Romney Island has been a popular fishing area, with Isaak Walton and Charles II recorded as fishing there.

Thames Path

The Thames Path should continue on the towpath on the Windsor side, but this has been closed off and walkers are forced to cross Albert Bridge, take the metalled road through Datchet and Sumptermead Ait and return over Victoria Bridge.

See also

• Locks on the River Thames

References

1. ^ "Environment Agency Dimensions of locks on the River Thames". web page. Environmental Agency. 8 November 2012. Retrieved 18 November 2012. Dimensions given in metres
2. Fred. S. Thacker The Thames Highway: Volume II Locks and Weirs 1920 - republished 1968 David & Charles
3. ^ "Environment Agency Distances between locks on the River Thames". web page. Environmental Agency. 19 November 2012. Retrieved 21 November 2012. Distances given in km.

51°27′48″N 0°34′9″W / 51.46333°N 0.56917°W / 51.46333; -0.56917

• Locks on the River Thames