The Town Pier, the main ferry terminus for many years, was designed by John Rennie and built between 1810 and 1813. The Harbour Light Tower was erected on its current site in 1817; until then, the Signal House was used by boats as an aid to navigation. Ferries berthed both at the Town Pier and at the Battery Pier (now beneath the Forth Bridge). To accommodate the deeper draughts of the new, larger steam-powered ferries, Thomas Telford extended Town Pier in 1828 to its present length. The Railway Pier, on the far side of West Bay, was the terminus of the new Dunfermline-North Queensferry Railway which opened in 1877. The Railway Pier was used as one of the northern ferry terminals from 1877 to 1890, and in 1920 it replaced the old Town Pier.