The Rotherhithe Tunnel consists of a single bore 4,860 feet (1,481 m) long, carrying a two-lane carriageway 48 feet (14.5 m) below the high-water level of the Thames. It also has two spiral entrance shafts for pedestrians, now closed to the public, located just before the points where the tunnel goes under the river bed. It was opened in 1908 by George Prince of Wales, and Richard Robinson, Chairman of the London County Council. It should not be confused with the nearby but earlier and much more historic Thames Tunnel, designed and built under the supervision of Marc Isambard Brunel and his son Isambard Kingdom Brunel, which is now used by the East London Line of the London Underground.