The Summit Tunnel
is one of the oldest railway tunnels
in the world: it was built between 1838 and 1841 by the Manchester and Leeds Railway
beneath the Pennines
. The tunnel is located between Littleborough
) and created a vital gateway between Manchester
The tunnel is just over 1.6 miles (2.6 km) long and carries two standard-gauge
tracks in a single tube, which is shaped like a horseshoe approximately 7.2 m wide and 6.6 m high.
The tunnel was mined by hand through shale, coal and sandstone, then lined with six courses of bricks (using over 23 million bricks in all)
, vol. 3, p. 20. Edinburgh: A. Fullarton & Co., 1851 to form the horseshoe shape. It was aligned by drilling fourteen vertical shafts to provide survey points on the hillside above: after the tunnel was completed two shafts were closed and the remaining twelve were used as blast relief shafts to vent steam from the locomotives that passed through.
When completed in 1841, it was the longest railway tunnel in the world.
Despite its age, the tunnel has been continuously used for passengers and goods
since it opened. The tunnel is track circuited with 'reed' type track circuits.
The tunnel closed for the first eight months of 1985 following a very serious fire in 1984
. The build up of heat in the surrounding ground led to the phenomenon of a 'false spring'. Many plants were seen to... Read More