River authorities controlled land drainage, fisheries and river pollution in rivers, streams and inland waters in England and Wales between 1965 and 1973.
Background
A Royal Commission, with Lord Bledisloe acting as its chairman, reported on the state of land drainage legislation covering England and Wales on 5 December 1927. It concluded that existing laws were "vague and ill-defined, full of anomalies, obscure, lacking in uniformity, and even chaotic." It recommended the creation of catchment boards with responsibility for main rivers, and formed the basis for the Land Drainage Act 1930, although only 47 of the 100 catchment boards suggested by the commission were enshrined in the legislation.
The River Boards Act 1948 sought to establish river boards throughout the whole of England and Wales, with overall responsibility for land drainage, fisheries and river pollution. Thirty-two river boards inherited the functions of the existing catchment boards, or took over the flood prevention functions on main rivers from local authorities where no catchment board existed. The exceptions were the River Thames Catchment Board and the Lee Conservancy Catchment Board, which continued to exist under the powers of the 1930 Act.