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Sunbury Lock
Sunbury lock with boats in the older hand-operated lock. The new lock is on the right
51°24′18.5″N 0°24′22″W / 51.405139°N 0.40611°W / 51.405139; -0.40611 (Sunbury Lock)
Waterway	River Thames
County	Surrey
Maintained by	Environment Agency
Operation	Old Manual New Hydraulic
First built	1812 (removed) 1856 (middle) 1927 (bankside)
Length	Old 47.15 m (154 ft 8 in) New 62.78 m (206 ft 0 in)
Width	Old 5.86 m (19 ft 3 in) New 7.41 m (24 ft 4 in)
Fall	Both locks 1.87 m (6 ft 2 in)
Above sea level	27 feet (8 m)
Distance to Teddington Lock	8 miles
Power is available out of hours

v t e Sunbury Lock the Walton, Weybridge and Shepperton reach of the Thames
Legend
River Thames above Shepperton Lock Pharaoh's Island Hamhaugh & Shepperton Lock Islands weirs & Shepperton Lock Bourne or the Chertsey Bourne Thames Lock weir of River Wey weir of River Wey Wey and Godalming Navigations D'Oyly Carte Island Historic Church and Manor House, Shepperton Desborough Island A244 Walton Bridge marinas The "Walton Mile" Tumbling bay weir River Ash (distributary of Colne) Storm weir Wheatleys Ait north Sunbury main weir Sunbury Lock Ait moorings boat rollers Sunbury Lock manual Lock River Thames above Molesey Lock

Sunbury Lock is a lock complex of the River Thames in England near Walton-on-Thames in north-west Surrey, the third lowest of forty four on the non-tidal reaches. The complex adjoins the right, southern bank about 1⁄2 mile (0.80 km) downstream of the Weir Hotel.

The complex is two locks, old and new, and a narrow concrete divide, which are downstream of the original lock built in 1812. The older, hand-operated, was originally built in 1856, seldom used. The newer was opened in 1927 by Lord Desborough. Rollers and a slope adjoins for the portage (hauling) of small boats. The lock adjoins Sunbury Lock Ait.

The lock has three associated weirs, upstream. The main weir is between Sunbury Lock Ait and Wheatley's Ait (north); the latter has two other weirs, one is a small part-time weir used in high flows.

History

The earliest major weir locally was built in 1789 specifically to divert water to create a deeper channel for navigation. Other such weirs locally were in place since medieval times because of many shoals and flats in the Sunbury, in the period of Old London Bridge (1209-1831) which caused much silting downstream the river locally had minor tidal effects. The first plan for a lock was in 1805 with an ambitious lock cut. A modified scheme in 1809 resulted in the first lock, later removed, built close to the footbridge to Sunbury Lock Ait, where its lock house of the same year survives. The associated long cut above the lock expanded a natural channel beside the island known as Church Island and the lock was opened in 1812. The lock had become dilapidated by 1852 and the arrival of water companies planning major water extraction from the section of the river below the lock added an incentive for rebuilding it. The lock was moved downstream and opened in 1856; a new lock house was built. In 1927 a second lock was added at Sunbury, which was opened by Lord Desborough, then president of the Thames Conservancy.

Access to the lock

The lock is inaccessible by road and can be reached along the towpath from The Weir Hotel, Walton-on-Thames. The weir stream and Wheatley's Ait backwater, the Creek, is used for kayaking from the northern bank, between Shepperton and Sunbury-on-Thames.

Reach above the lock

A 300 m cut upstream of Sunbury Lock Ait links to the Weir Hotel facing the Sunbury Weir which is followed by Wheatley's Ait hosting an Environment agency working area and riverside housing. More riverside housing, small parks and a marina feature on the Walton Mile and Cowey Sale reach below and above Walton Bridge, two pubs, and a marina. After Walton Bridge the river divides between the old course which meanders through Lower Halliford and Old Shepperton and the direct Desborough Cut alongside Desborough Island. Before Shepperton lock the waters rejoin where the Wey navigation the River Bourne and two mouths of the Wey join surrounding Hamhaugh Island. Immediately these, including the lock, the Shepperton to Weybridge Ferry.

Navigation transit markers are beside Desborough Cut to allow river users to check their speed.

The reach is home to six rowing clubs, a skiffing club, sailing and canoeing clubs. Walton and Weybridge Regatta, Walton Small Boats Head, Weybridge Silver Sculls, Weybridge Ladies Regatta and Walton Skiff Regatta are annual events.

Thames Path

The Thames Path continues along the Surrey bank until just before Shepperton Lock where the ferry goes across to the other side. To avoid the ferry calls for a long detour over Walton Bridge and via Shepperton.

Sports clubs on the reach

• Elmbridge Canoe Club
• Walton Rowing Club
• Weybridge Rowing Club
• Weybridge Ladies Rowing Club
• Weyfarers (recreational and pilot gig) Rowing Club
• St George's College Boat Club
• Thames Valley Skiff Club
• Desborough Sailing Club

Kayaking

Sunbury Weir has the highest volume and fastest freestyle kayaking playspot on the River Thames. It is wide, surging and unfriendly to new or inexperienced paddlers. The eddyline is also very unstable and requires considerable effort to cross.

Access

Public car park on Fordbridge Road above on the left bank. From here across an informal football pitch with playground is a backwater, the Creek, which joins below the main weir.

Gates and weir pool level

The weir's gates are variously opened or closed as with the storm weir along the Creek.

Sunbury provides its optimal water at a certain pool level — dependent on how many gates are open at the downstream weir (at Molesey), kayaking websites provide details.

Water levels

• Sunbury Weir will need to be on at least 1+1⁄2 gates for usable features, pool level depending.
• Hurley Weir needs to be on at least 3 gates for sufficient water.

Literature and the Media

The lock is mentioned in Jerome K. Jerome's book Three Men in a Boat

"The river is sweetly pretty there just before you come to the gates, and the backwater is charming: but don't attempt to row up it"

See also

• Locks on the River Thames
• Rowing on the River Thames
• Kayaking and Canoeing on the River Thames
• Sailing on the River Thames

External links

• Shepperton Whitewater Centre for Sunbury Weir Levels
• Thames Valley Freestylers weir levels

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 22 November 2012. Distances given in km.

v t e Borough of Elmbridge
Towns, villages and neighbourhoods	Cobham Cobham Downside Stoke d'Abernon Little Heath Esher Claygate Esher Hinchley Wood West End Surbiton Long Ditton Thames Ditton Thames Ditton Weston Green Molesey Molesey (in traditional parish, East Molesey and West Molesey) Leatherhead Leatherhead, Oxshott Walton on Thames Ashley Park Burwood Park Hersham Walton-on-Thames Weybridge Oatlands St George's Hill Weybridge
Notable parks	Cigarette Island Park Esher Commons Giggs Hill Green Hurst Park Molesey Heath Oxshott Heath and Woods Painshill Weybridge Heath
Places of worship	St George's Church, Esher St Mary's Church, Stoke d'Abernon Church of St Nicholas, Thames Ditton Weybridge United Reformed Church
Education	ACS International Schools Brooklands College Danes Hill School Esher Church of England High School Esher Sixth Form College Feltonfleet School Heathside School Hinchley Wood School Milbourne Lodge School Notre Dame School Reed's School Three Rivers Academy St George's College (part)
Transport	Railway stations Claygate Cobham & Stoke d'Abernon Esher Hampton Court Hersham Hinchley Wood Oxshott Thames Ditton Walton-on-Thames Weybridge Roads M25 A3 A244 A307 A3050 Notable other Thames Path London Outer Orbital Path Wey Navigation
Buildings and structures	Bessborough Reservoir Brooklands Brooklands Museum Claremont Estate Cobham Park Cobham Training Centre Esher Place Hurst Park Racecourse Knight Reservoir Island Barn Reservoir London Bus Museum Molesey Lock Molesey Reservoirs Queen Elizabeth II Reservoir Sandown Park Racecourse Sunbury Lock Wayneflete Tower
Sport	Dittons Skiff and Punting Club East Molesey Cricket Club Esher RFC Metropolitan Police F.C. Molesey Boat Club Molesey F.C. Surbiton Hockey Club Thames Ditton Lawn Tennis Club Thames Valley Skiff Club Walton Casuals F.C. Walton & Hersham F.C. Walton Rowing Club Weybridge Rowing Club
Places listed are articles notable as settlements, arranged by post town The M25 motorway follows approximately a boundary and is included for its regional importance.

• Locks on the River Thames
• Weirs on the River Thames
• Sunbury-on-Thames