of the Land Drainage Act 1961, 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 Thames Conservancy Acts of 1950 and 1959, rather than the River Boards Act. The Water Act 1973 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, the river management functions passed to the new National Rivers Authority and in 1996 to the Environment Agency. 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 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