Severn Tunnel

Located in the United Kingdom, the Severn Tunnel connects South Gloucestershire to Monmouthshire, beneath the River Severn. Construction of the Severn Tunnel was carried out from 1873 to 1886, by the Great Western Railway. Although the tunnels construction was completed in 1885, it took 14 years before the tunnel could service goods trains and passenger traffic because pumping systems were still unfinished. Before the high speed 1 tunnels were built in London, the Severn Tunnel served as the countrys longest mainline tunnel. Today, it is still a significant railway line and serves a heavy amount of passenger trains and receives freight traffic as well.