Thackley Tunnel
Encyclopedia
Thackley tunnel is a railway tunnel
Tunnel
A tunnel is an underground passageway, completely enclosed except for openings for egress, commonly at each end.A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. Some tunnels are aqueducts to supply water for consumption or for hydroelectric stations or are sewers...

 on the Airedale Line
Airedale Line
The Airedale Line is the name given to one of the rail services in the Metro area of northern England. The service is operated by Northern Rail, on the route connecting Leeds and Bradford with Skipton in the North of England. Some services along the line continue to Morecambe or Carlisle...

 from Leeds
Leeds City railway station
Leeds railway station is the mainline railway station serving the city centre of Leeds in West Yorkshire, England...

 to Shipley
Shipley railway station
Shipley railway station serves the town of Shipley in West Yorkshire, England.Train services are mostly commuter services between Leeds and Bradford, the Airedale Line , and the Wharfedale Line...

 then on to Bradford
Bradford Forster Square railway station
Bradford Forster Square station is a railway station in Bradford, West Yorkshire, England. The majority of services to/from the station use Class 333 electrified trains operated by Northern Rail, on the Airedale Line to Skipton, the Wharfedale Line to Ilkley and the Leeds-Bradford Line to Leeds.The...

 or Skipton
Skipton railway station
Skipton railway station serves the town of Skipton in North Yorkshire, England on the Airedale Line. It is operated by Northern Rail and is situated north-west of Leeds....

.
Built in 1844/5, the tunnel is approximately 1300 yards (1,188.7 m) long and cut through the prominent Thackley Hill to reduce travel time. The contractor chosen to build the Tunnel was James Bray, an iron and brass founder from Leeds who later contracted the construction of the Bramhope Tunnel
Bramhope Tunnel
The Bramhope Tunnel is a railway tunnel long, owned by Network Rail on a route currently operated mainly by Northern Rail. It was constructed during 1845–1849 on the Harrogate Line, carrying rural and commuter passengers between Horsforth and Weeton in West Yorkshire, England...

on the Leeds to Thirsk main line.

Originally there was just one Tunnel bore but in 1900 the line was increased to four tracks and a second tunnel bore was built, one carrying the Fast lines from Leeds and the other the Slow lines.
The Southern tunnel was closed in 1968 co-inciding with the final closure of the Great Northern Branch Line from Shipley to Laisterdyke via Idle and Thackley.
At the Western mouth of the Tunnel stood the original Idle station (albeit closer to Thackley than Idle), which opened in 1847 and closed the following year in 1848.
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