19th-century London (1819), Waterloo Bridge (1817), the Hungerford Bridge (opened in 1845 as a footbridge, and converted in 1859 into a combination footbridge/railway bridge for Charing Cross Station), and Tower Bridge (1894). Further upriver, the new bridges included Lambeth Bridge (1862), which replaced a centuries-old cross-river ferry service, Vauxhall Bridge (opened 1816), Victoria Bridge (opened in 1858 and later renamed the Chelsea Bridge), and Wandsworth Bridge (1873). The impetus for this building was London's massive population growth, which put a constant strain on existing communications between the north and south banks. London Bridge remained the city's busiest artery for the entire century,
London Bridge Rennie's son. Work began in 1824 and the foundation stone was laid, in the southern coffer dam, on 15 June 1825. The old bridge continued in use while the new bridge was being built, and was demolished after the latter opened in 1831. New approach roads had to be built, which cost three times as much as the bridge itself. The total costs, around £2.5 million (£ in ), were shared by the British Government and the Corporation of London. Rennie's bridge was long and wide, constructed from Haytor granite. The official opening took place on 1 August 1831; King