Summit Tunnel
Summit Tunnel in England is one of the world's oldest railway tunnels. It was constructed between 1838 and 1841 by the Manchester and Leeds Railway Company to provide a direct line between Leeds and Manchester. When built, Summit Tunnel was the longest railway tunnel in the world.
The tunnel, between Littleborough and Walsden near Todmorden, was bored beneath the Pennines, a natural obstruction to most forms of traffic. The tunnel is just over 1.6 miles (2.6 km) long and carries two standard-gauge tracks in a single horseshoe-shaped tube, approximately 24 feet (7.2 m) wide and 22 feet (6.6 m) high. Summit Tunnel was designed by Thomas Longridge Gooch, assisted by Barnard Dickinson.
At the peak of construction, a workforce of between 800 and 1,250 men and boys was active, aided by about 100 horses and 13 stationary steam engines, which were used to remove material from the shafts.
Roch Aqueduct crosses the railway a short distance to the south.