1889 described a typical boating journey. Lock replacements continued with Marsh in 1888, Temple in 1890 and Cookham 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. A further Thames Conservancy Act was passed in 1894 which 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 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 and Osney. Molesey Lock was replaced in 1906 and Mapledurham Lock in 1908. After separation of the Port of London Authority In 1908, the Port of London Act transferred responsibility for the Tideway including Richmond Lock to the Port of London Authority, which began its duties on 31 March 1909. A demarkation point set the authorities' shared boundary as that of the parishes of Teddington and Twickenham, with an obelisk 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