666
Chertsey Abbey founded by Saint Erkenwald
675
Abingdon Abbey founded by Cissa, King of the West Saxons (or his nephew Hean)
955-963
One of the first cuts created at Abingdon
1070-86
1100s
Popularity of the Thames Valley grows with further monastic houses founded at Reading, Osney and Bisham

The Crown claims ownership of all swans on the Thames and the first Swan Upping is held
Swans and cygnets, photo by Ellie Thorne
1200s
First flash locks start to appear on the river
1215
Magna Carta is signed at Runnymede
1350
First act passed against obstructions on the navigable highway
1400s
The Vintners’ and Dyers’ Companies granted shared rights with the Crown to swans on the river
1605 and 1623/4
Oxford and Burcot Acts passed
1630-1631

First pound locks built on the river at Iffley, Sandford and Swift Ditch by the Oxford-Burcot Commission
Plaque at Iffley Lock , photo by Michaela Garland
1695

‘An Act to prevent Exactions of the Occupiers of Locks and Wears upon the River of Thames Westward, and for ascertaining the Rates of Water-carriage upon the said River’
D/EX1052/1
1751
Thames Navigation Commissioners formed under an Act of Parliament, with limited powers to improve the river
1770

Survey of the river undertaken by James Brindley, with proposal to bypass the river with a canal from Boulter’s Lock to Mortlake
D/TC/J1/7/2
1771
Petitions presented to the House of Commons with proposals to improve the navigable state of the river
26 April 1771
‘Act for improving and completing the Navigation of the Rivers Thames and Isis from the City of London to the town of Cricklade in Wiltshire’ passed
9 May 1771
First meeting of the Thames Navigation Commissioners held at Henley Town Hall
1772
Boulter’s Lock is the first lock built by the Commissioners
1773
![Colour plan of Hambledon Pound Lock showing Towing path, Eyet [island], Pound Lock, Pound House, Garden, winch, cut, meadow, Weir and Weir Lock.](https://thames250.files.wordpress.com/2021/05/d-tc-j1-7-8_pg029-hambledon-pound-lock.jpg?w=1024)
Sonning, Shiplake, Marsh, Hambleden, Hurley, Temple and Marlow locks built
Hambleden Pound Lock, D/TC/J1/7/8
1774
Small wooden houses for lock-keepers built at Sonning, Hambleden and Boulter’s Locks
Extreme flooding cuts off Oxford and washes Henley Bridge away
1777
1777-1778
Further locks built including Mapledurham and Caversham
1784
Commission approached the City for financial assistance towards improving the navigation
1786
William Jessop hired to advise the Thames Commissioners on the construction of the second series of locks they intended to build
1787-1789

Cleeve, Goring, Whitchurch, Benson and Day’s Locks built
Goring lockhouse, photo by Michaela Garland
1790-1791
St. John’s, Buscot, Rushey, Pinkhill, Godstow, and Osney (Oxford) Locks built
1791
Thames Navigation Commission start purchasing private weirs in order to have sole control of the stream
1809
Flooding destroys or damages bridges at Wallingford, Bisham, Eton and Windsor
1818
Steam propelled vessels start being used on the river
1829
The first Oxford-Cambridge Boat Race is held at Henley
1835

Thames Navigation Commissioners unsuccessfully oppose the Great Western Railway Act
Gatehampton Viaduct designed by Brunel in 1835, D/EX2807/6/5
1839
The first Henley Regatta is held
1840
Act passed ‘to provide for keeping the peace on Canals and Navigable Rivers’
1852
Reduced income due to competition from the railway means that lock-keepers’ wages are reduced
29 September 1857

First Thames Conservancy Act passed and twelve Conservators appointed (Act only covered the river eastward of the London Stone at Staines)
Thames Conservancy logo, D/TC/Z1
7 October 1857
First meeting of the Conservators held at Mansion House
October 1857
Corporation of London hand over an inventory of all its machinery and stores
6 August 1866
Act transfers the Thames Navigation Commissioners’ administration to the Thames Conservancy extending their responsibilities to include the whole of the river.
Thames Navigation Commission is wound up
1860s-1880s
Pleasure punting becomes popular
1871

First Thames Conservancy Act passed and twelve Conservators appointed (Act only covered the river eastward of the London Stone at Staines)
Thames Drainage Commissioners logo, D/TC/J2/4/1
1878
Thames Conservancy Act passed, required six London water companies to make additional payments for water taken from the river
1881
Electric alarm bells were fitted to ‘all locks where there are mills’ to indicate fluctuation in the water level.
1883
Thames Act 1883 gives Conservators powers to register all pleasure craft using the river
1885
Thames Preservation Act 1885 passed for ‘the preservation of the River above Teddington lock for purposes of public recreation, and for regulating the pleasure traffic therein’
1887

Tolls from pleasure crafts are three times greater than from commercial vessels
Boat trip, D/EX2121/1/4
The first Goring & Streatley Regatta is held
1889
Jerome K Jerome’s Three Men in a Boat is published
1894
Thames Conservancy Act tidies up previous legislation
High rainfall causes extreme flooding in all riverside towns
1898
First lock-keeper’s lock garden competition
Thames Byelaws relating to navigation passed
1904

The Sir Reginald Hanson Challenge Cup for lock gardens awarded for the first time
Sonning Lock (reproduced with permission of Reading Library)
1908
1908 Olympic rowing events held at Henley
Kenneth Grahame’s The Wind in the Willows is published
21 December 1908
Act transfers Thames Conservancy’s control of the river below Teddington to the Port of London Authority
1916
All permanent lock-keepers, weir keepers and ferrymen provided with a house by the Conservators
1921
Thames Conservancy Act passed to raise the contribution of the Metropolitan Water Board for five years Aim of act is to raise finances to undertake arrears of work accumulated during the First World War
1930
Land Drainage Act conferred to the Conservators the power to carry out flood prevention works
1930s

After a decline in pleasure boating since the start of the First World War the popularity of motor boats starts to increase
River Thames boat, D/EX73/3/28/58
1932
Thames Conservancy Act passed to revise previous byelaws
1940

Upper Thames Patrol formed to protect the river during the Second World War
Upper Thames Patrol logo, D/EGL/O166/6
1946
Mrs M M Ashdown becomes the first woman appointed to the Thames Conservancy Board
1947

Over 4000 properties in Reading, Maidenhead and Windsor are inundated by water during a week’s long flood
March 1947 flood level, photo by Ellie Thorne
Lock-keepers’ Welfare Committee formed with one of the first issues being the electrification of their houses
1948
Olympic rowing events held at Henley
1951
Rivers (Prevention of Pollution) Act passed with ‘provision for maintaining or restoring wholesomeness of rivers and other inland or coastal waters of England and Wales’
1957
Start of programme to modernise lock-houses and ferry cottages
1960s
1973
Water Act 1973 established water authorities with the Thames Water Authority to take the place of the Thames Conservancy from 1974
1977
Lock-keepers compete for garden awards for the final time
1989
Water Act 1989 established a National Rivers Authority to replace the regional authorities
1991
Water Resources Act 1991 consolidates the 1989 Act
1996

The Environment Agency takes over management of the river with environmental issues being of paramount importance
2020
Many events including Swan Upping (for first time in 900 years) cancelled due to Covid-19