
The Thames Conservancy (formally the Conservators of the River Thames) was a body responsible for the management of
that river in
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
. It was founded in 1857 to replace the jurisdiction of the City of London up to
Staines. Nine years later it took on the whole river from
Cricklade in
Wiltshire
Wiltshire (; abbreviated to Wilts) is a ceremonial county in South West England. It borders Gloucestershire to the north, Oxfordshire to the north-east, Berkshire to the east, Hampshire to the south-east, Dorset to the south, and Somerset to ...
to the sea at
Yantlet Creek on the
Isle of Grain. Its territory was reduced when the
Tideway (upper and lower estuary) was transferred to the
Port of London Authority
The Port of London Authority (PLA) is a self-funding public trust established on 31 March 1909 in accordance with the Port of London Act 1908 to govern the Port of London. Its responsibility extends over the Tideway of the River Thames and its ...
in 1909.
In 1974 the conservancy was taken into the
Thames Water Authority, later to devolve to the
Environment Agency
The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
in almost all respects.
History
Background

The stretch of river between the town of
Staines, just to the west of
London
London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
, and Yantlet Creek had been claimed by the
City of London
The City of London, also known as ''the City'', is a Ceremonial counties of England, ceremonial county and Districts of England, local government district with City status in the United Kingdom, city status in England. It is the Old town, his ...
since 1197 under a charter of
Richard the Lionheart
Richard is a male given name. It originates, via Old French, from compound of the words descending from Proto-Germanic language">Proto-Germanic ''*rīk-'' 'ruler, leader, king' and ''*hardu-'' 'strong, brave, hardy', and it therefore means 'st ...
. The jurisdiction was marked by the
London Stone
London Stone is a historic landmark housed at 111 Cannon Street in the City of London. It is an irregular block of oolitic limestone measuring 53 × 43 × 30 cm (21 × 17 × 12"), the remnant of a once much larger object that had st ...
s. In 1771 the
Thames Navigation Commission was established from a body created twenty years earlier to handle navigation on the river. Although the commissioners were active in establishing locks and weirs above Staines, they did not interfere with the jurisdiction of the City of London.
The
City of London Corporation
The City of London Corporation, officially and legally the Mayor and Commonalty and Citizens of the City of London, is the local authority of the City of London, the historic centre of London and the location of much of the United Kingdom's f ...
built a series of locks from
Teddington
Teddington is an affluent suburb of London in the London Borough of Richmond upon Thames. Historically an Civil parish#ancient parishes, ancient parish in the county of Middlesex and situated close to the border with Surrey, the district became ...
to
Penton Hook at the beginning of the nineteenth century. They also used material from the demolished
Old London Bridge to support the embankments between
Sunbury and
Shepperton
Shepperton is a village in the Borough of Spelthorne, Spelthorne district, in north Surrey, England, around south west of central London. The settlement is on the north bank of the River Thames, between the towns of Chertsey and Sunbury-on-Tha ...
.
However trouble arose around 1840 when the government proposed building the
Victoria Embankment and
the Crown
The Crown is a political concept used in Commonwealth realms. Depending on the context used, it generally refers to the entirety of the State (polity), state (or in federal realms, the relevant level of government in that state), the executive ...
claimed title to the river bed. The dispute simmered on for 17 years.
Meanwhile, as a result of competition from the railways, the volume of traffic on the river had been drastically reduced. Income from tolls fell from £16,000 in 1839 to less than £8,000 in 1849, while maintenance charges for 1850 were estimated at nearly £7,000. The City's unwillingness to pay for necessary expenditure led to complaints. By the
Thames Conservancy Act 1857, the Crown reclaimed its rights and transferred them to the new body.
First conservancy (1857)
The City of London handed its inventory to the Thames Conservancy in October 1857. In June 1857 the first stone of a new lock at Teddington had been laid at the present position, being the central of the three locks. The conservancy opened it in 1858 together with the narrow
skiff lock, (known as "the coffin"). and the conservancy soon imposed regulations. In 1858 a toll of 15 shillings was imposed on every steam vessel passing
Teddington Lock, and a speed limit set to five miles per hour. This was amended to 5 mph with the stream and 4 mph against it. Netting from Richmond to Staines was prohibited forever. The new authority reaffirmed the rights of anglers against interference from landowners and received a notice from the
water bailiff
A water bailiff is a law-enforcement officer responsible for the policing of bodies of water, such as rivers, lakes or the coast. The position has existed in many jurisdictions throughout history.
Scotland
In Scotland, under the Salmon and Fresh ...
drawing attention to the "improper practice of letting boats for hire to inexperienced persons". At this time the management of the bulk of the upstream river was the responsibility of the
Thames Navigation Commissioners, but this changed in 1866.
Second conservancy (1866)
In 1866 it was considered expedient to put the navigation of the whole of the river under one management It was said that the Thames Commissioners were too numerous, the
locks and weirs on the River Thames were in a bad condition and income was insufficient to pay for maintenance. It was believed that under single management with the upper river maintained properly and with lower tolls overall the traffic would increase. On 6 August 1866, the
Thames Navigation Act 1866 allowed the Thames Conservancy to take over management of the river from Cricklade to Yantlet Creek, a distance of 177 miles (285 km).

Under the act, all locks canals and other works of the commissioners were transferred to the conservancy. In addition provision was made for all weirs to be transferred to the Conservancy from private owners. Former owners of weirs were freed from liability but two weirs at Buscot and Eaton remained to the owner of
Buscot Park. Most weirs belonged to the twenty eight water-mills still operating between Oxford and Staines and the entitlement to water of the mills, many of which dated back to
Domesday Book
Domesday Book ( ; the Middle English spelling of "Doomsday Book") is a manuscript record of the Great Survey of much of England and parts of Wales completed in 1086 at the behest of William the Conqueror. The manuscript was originally known by ...
, was recognised. No new flow of sewage into the river or its tributaries was allowed and existing sewage works were to be removed. New revenue was raised by a £1,000 per annum charge on each of the
five water companies. The
Southwark and Vauxhall,
Grand Junction and
West Middlesex water companies had set up their works at
Hampton in the 1850s after it became illegal to take water from the
Tideway. The
Lambeth
Lambeth () is a district in South London, England, which today also gives its name to the (much larger) London Borough of Lambeth. Lambeth itself was an ancient parish in the county of Surrey. It is situated 1 mile (1.6 km) south of Charin ...
and
Chelsea water companies had moved initially to
Seething Wells but later relocated to
East Molesey
East is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth.
Etymology
As in other languages, the word is formed from the fact that ea ...
. Whereas the City of London owned the river bed for its part of the river, the Thames Commissioners did not and hence Thames Conservancy did not acquire the ownership of the river bed for the section above Staines which remained (and remains) the property of the
riparian
A riparian zone or riparian area is the interface between land and a river or stream. In some regions, the terms riparian woodland, riparian forest, riparian buffer zone, riparian corridor, and riparian strip are used to characterize a ripar ...
owners.
In August 1866 the conservancy inspected works between Oxford and Windsor and in October settled a table of tolls.
Bell Weir Lock had collapsed in June and was rebuilt the following year. In 1868 tolls were placed on three of the four locks then above Oxford –
St John's,
Buscot and
Pinkhill Locks.
Rushey Lock was omitted and there were no tolls on the weirs. This reflects the poor state of navigation above Oxford. Some of the old locks on the rest of the river were still wooden pens and these were gradually renewed or replaced. Works completed in 1869 included the rebuilding of
Romney Lock and the addition of a boat slide at Teddington. In 1870
Hambleden Lock and
Benson Lock were rebuilt, followed by
Day's Lock in 1871 and
Godstow Lock in 1872. In the 1870s it is recorded that Teddington weir collapsed twice causing enormous damage.
In 1872 the conservancy promised to reopen navigation between
Radcot and
Newbridge by repairing Rushey Lock but in 1874 recognised that they lacked the funds to meet the promise. There were regular complaints at this time about the poor state of river particularly in upper reaches and the persistence of sewage.

Lock replacements continued with
Shiplake and
Cleeve in 1874,
Caversham in 1875,
Whitchurch in 1876 and
Bell Weir in 1877. In 1883 the conservancy removed the lock at
Chalmore Hole at
Wallingford, after many years petitioning by residents of Wallingford for its retention. The weirs at Hambleden were built in 1884 and the public right of way across the river sustained by building the walkway.
Bray Lock was rebuilt in 1885.
The
Thames Preservation Act 1885 was passed to enshrine the preservation of river for public recreation. It prohibited shooting on the river which had become a cause of concern. The act noted "It is lawful for all persons for pleasure or profit to travel or to loiter upon any and every part or the river" (apart from private cuts). The river had become exceedingly popular for sport and leisure. Many regattas or "aquatic fetes" had been instigated and Jerome K. Jerome's ''
Three Men in a Boat'' published in 1889 described a typical boating journey.
Lock replacements continued with
Marsh
In ecology, a marsh is a wetland that is dominated by herbaceous plants rather than by woody plants.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p More in genera ...
in 1888,
Temple
A temple (from the Latin ) is a place of worship, a building used for spiritual rituals and activities such as prayer and sacrifice. By convention, the specially built places of worship of some religions are commonly called "temples" in Engli ...
in 1890 and
Cookham
Cookham is a historic River Thames, Thames-side village and civil parishes in England, civil parish on the north-eastern edge of Berkshire, England, north-north-east of Maidenhead and opposite the village of Bourne End, Buckinghamshire, Bourne ...
in 1892 The first new lock was built at
Radcot Lock in 1892, and
Chertsey Lock was lengthened in 1893. A major work in 1894 was the
Richmond Lock and weir complex built to ensure that there is always at least a depth of water in the river between Richmond and Teddington.
The (
57 & 58 Vict. c. clxxxvii) consisted mainly of tidying up legislation. The conservancy finally addressed navigation above Oxford, replacing the existing weirs with locks and footbridges where there was a right of way. New locks were
Grafton Lock and
Northmoor Lock in 1896 and
Shifford Lock in 1898. Also in 1898 the conservancy rebuilt Pinkhill and Rushey. Downstream, Boveney was rebuilt in 1898, with the old lock replaced by a boat slide and Shepperton was also rebuilt on a different alignment in 1899.
By the end of the 19th century the advance in the size of ships and the growth of the Port of London raised questions of management and a
royal commission
A royal commission is a major ad-hoc formal public inquiry into a defined issue in some monarchies. They have been held in the United Kingdom, Australia, Canada, New Zealand, Norway, Malaysia, Mauritius and Saudi Arabia. In republics an equi ...
reported in 1900 recommending that a single body take responsibility for the port.
Meanwhile at Teddington, the barge lock, the largest lock on the river at , was built in 1904–1905. Locks rebuilt in 1905 included
Abingdon, St Johns,
Sonning
Sonning (traditional: ; modern: ) is a village and civil parish in Berkshire, England, on the River Thames, east of Reading, Berkshire, Reading. The village was described by Jerome K. Jerome in his book ''Three Men in a Boat'' as "the most fair ...
and
Osney.
Molesey Lock was replaced in 1906 and
Mapledurham Lock
Mapledurham Lock is a lock (water transport), lock and weir situated on the River Thames in England, about 4 miles upstream of Reading, Berkshire, Reading. The lock was first built in 1777 by the Thames Navigation Commissioners and the present ...
in 1908.
After separation of the Port of London Authority

The
Port of London Act 1908 (
8 Edw. 7. c. 68) transferred responsibility for the
Tideway including Richmond Lock to the
Port of London Authority
The Port of London Authority (PLA) is a self-funding public trust established on 31 March 1909 in accordance with the Port of London Act 1908 to govern the Port of London. Its responsibility extends over the Tideway of the River Thames and its ...
, which began its duties on 31 March 1909.
A demarcation point set the authorities' shared boundary as that of the parishes of
Teddington
Teddington is an affluent suburb of London in the London Borough of Richmond upon Thames. Historically an Civil parish#ancient parishes, ancient parish in the county of Middlesex and situated close to the border with Surrey, the district became ...
and
Twickenham
Twickenham ( ) is a suburban district of London, England, on the River Thames southwest of Charing Cross. Historic counties of England, Historically in Middlesex, since 1965 it has formed part of the London Borough of Richmond upon Thames, who ...
, with an
obelisk
An obelisk (; , diminutive of (') ' spit, nail, pointed pillar') is a tall, slender, tapered monument with four sides and a pyramidal or pyramidion top. Originally constructed by Ancient Egyptians and called ''tekhenu'', the Greeks used th ...
below Teddington Lock: the Thames Conservancy remained responsible for the non-tidal river between Cricklade and Teddington.
Lock rebuilds took place at
Penton Hook in 1909 and
Hurley in 1910. In 1912 the conservancy undertook major works at
Boulter's Lock, which involved the purchase of
Ray Mill Island.
Chertsey Lock was lengthened in 1913 and
Marsh Lock rebuilt in 1914. Goring Lock was rebuilt in 1921 with a third central set of gates and Godstow Lock rebuilt in 1924. In 1927 a new lock was built at Sunbury, the old one being retained. Marlow Lock and Iffley Lock were redeveloped in the same years. In 1928 the improvement to navigation above Oxford was finally completed with the building of
Eynsham Lock and
King's Lock.

The next significant undertaking was the digging of
Desborough Cut between 1930 and 1935. The –mile (1 km) cut took the river on a straight course between
Weybridge
Weybridge () is a town in the Borough of Elmbridge, Elmbridge district in Surrey, England, around southwest of central London. The settlement is recorded as ''Waigebrugge'' and ''Weibrugge'' in the 7th century and the name derives from a cro ...
and
Walton on Thames, and avoiding a meandering stretch past
Shepperton
Shepperton is a village in the Borough of Spelthorne, Spelthorne district, in north Surrey, England, around south west of central London. The settlement is on the north bank of the River Thames, between the towns of Chertsey and Sunbury-on-Tha ...
and its
Lower Halliford locale. The channel cut the regularity of flooding in Chertsey and Old Shepperton and halved the distance of travel on that part of the river.
The (
22 & 23 Geo. 5. c. xxxvii) dealt with construction of jetties and landing stages on the river.
In the 1960s modernisation of the locks began with the first hydraulic system introduced at Shiplake Lock in 1961.
Sandford Lock was rebuilt in 1972.
Governance
Significant change in the structure of the conservancy in the 20th century began with the passing of the
Land Drainage Act 1930 (
20 & 21 Geo. 5. c. 44). This created
catchment boards and
drainage boards over much of England and Wales, but the Thames above Teddington was treated as a special case, as outlined in section 79 of that act. The conservators automatically became a catchment board, and were required to carry out the drainage functions described in section 34 of the act, although not until two years after the act came into force. All the existing conservators had to resign, although they could be reappointed as part of the new regime. Schedule 6 contained a list of who was responsible for the appointment of the 31 new members, which consisted mostly of county councils and county borough councils, together with one appointed by the
Minister of Agriculture and Fisheries, one by the
Board of Trade
The Board of Trade is a British government body concerned with commerce and industry, currently within the Department for Business and Trade. Its full title is The Lords of the Committee of the Privy Council appointed for the consideration of ...
and one by the
Minister of Transport. The Minister of Agriculture and Fisheries could also appoint three additional members after consultation with internal drainage boards. The new conservators were required to keep separate accounts relating to their activities under the act, and those relating to activities bestowed on them by various Conservancy Acts dating from 1894 to 1924.
The
River Boards Act 1948 (
11 & 12 Geo. 6. c. 32) replaced catchment boards with
river boards, covering the whole of England and Wales, but again the Thames Conservancy was treated as a special case. The act introduced new constitutional, financial and general administrative powers for the river boards, but the Thames Conservancy continued to operate under the 1930 legislation. The next change occurred with the passing of the
Land Drainage Act 1961 (
9 & 10 Eliz. 2. c. 48), the provisions of which were applied to the Thames Conservancy, although the conservancy did not formally become a
river authority in the way that other river boards did. Mention was made in the act that the Thames Conservators derived some of their powers from the (
14 Geo. 6. c. l) and (
7 & 8 Eliz. 2. c. xxvi), rather than the River Boards Act 1948.
The
Water Act 1973 (c. 37) abolished river authorities, replacing them with ten
regional water authorities, and on 1 April 1974, the Thames Conservancy was subsumed into the new
Thames Water Authority, although much of the organisation remained intact as the authority's Thames Conservancy Division. However, when Thames Water was privatised in 1990 as a result of the
Water Act 1989 (c. 15), the river management functions passed to the new
National Rivers Authority and in 1996 to the
Environment Agency
The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
.
Locks built by the Thames Conservancy
*
Radcot Lock (1892)
*
Richmond Lock (1894)
*
Grafton Lock (1896)
*
Northmoor Lock (1896)
*
Shifford Lock (1898)
*
Iffley Lock (1927)
*
Eynsham Lock (1928)
*
King's Lock (1928)
Chairmen of Thames Conservancy
*
Sir Frederick Dixon-Hartland (1895–1904)
*
Lord Desborough (1905–1936)
*
J. D. Gilbert (1937–1938)
*
Sir Jocelyn Bray (1938–1960)
*
Lord Nugent (1961-c.1970)
References
Bibliography
*
*
*
*
*
{{Authority control
1857 establishments in England
Defunct public bodies of the United Kingdom
History of the River Thames
Former water company predecessors of Thames Water
Water management authorities in the United Kingdom