Tunnels underneath the River Thames

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The table below lists many of the tunnels under the River Thames in and near London, which, thanks largely to its underlying bed of clay, is one of the most tunnelled cities in the world. The tunnels are used for road vehicles, pedestrians, Tube and railway lines and utilities. Several tunnels are over a century old: the original Thames Tunnel was the world's first underwater tunnel.

East (downstream) to west (upstream) Name Type Between... Construction year Comments
1 Tilbury-Gravesend Cable Tunnel Utilities Former Tilbury power station↔Eastcourt Marsh sealing end compound 1970 1,675 metres long, carries two 400kV circuits;[1][2] depth 46 metres, only accessible by authorized personnel
2 High Speed 1 Twin Rail Tunnels SwanscombeKentWest ThurrockEssex 2007
3 Dartford Tunnel Twin Road Tunnels 1963 West Tunnel - 1963, East Tunnel - 1980
4 Dartford Cable Tunnel Utilities 2004
5 Docklands Light Railway Tunnels Rail Woolwich ArsenalKing George V 2009
6 Crossrail Tunnels Rail Woolwich ↔ North Woolwich 2015 The tunnel construction was finished in 2015, they are due to begin rail service in 2020/21
7 Woolwich foot tunnel Foot WoolwichNorth Woolwich 1912 Maurice Fitzmaurice
8 Thames Barrier Service Woolwich ↔ North Woolwich 1984 Service tunnel only accessible by authorized personnel
9 Millennium Dome electricity cable tunnel Utilities North Greenwich ↔ Blackwall 1999 2.8 metre diameter, only accessible by authorized personnel
10 London Underground Jubilee line Tunnels Rail North GreenwichCanning Town 1999
11 Blackwall Tunnels Road North GreenwichBlackwall 1897 Second bore in 1967. Alexander Binnie
12 London Underground Jubilee line Tunnels Rail Canary WharfNorth Greenwich 1999
13 Docklands Light Railway Tunnels Rail Island GardensCutty Sark 1999
14 Greenwich Foot Tunnel Foot[3] MillwallGreenwich 1902 Alexander Binnie
15 London Underground Jubilee line Tunnels Rail Canada WaterCanary Wharf 1999
16 Rotherhithe Tunnel Road, cycle, foot RotherhitheLimehouse 1908 Maurice Fitzmaurice
17 Thames Tunnel Rail WappingRotherhithe 1843 Marc Brunel. The world's first underwater tunnel, now part of the Overground network. Originally a foot tunnel.
18 Tower Subway Utilities 1870 Peter W. Barlow and James Henry Greathead. The world's first underground tube railway. A rail tunnel for 3 months only, then a foot tunnel. Currently carries pipes and fibre-optic lines.
19 London Underground Northern line Tunnels (City Branch) Rail London Bridge stationBank 1900
20 City and South London Railway Tunnels Disused BoroughKing William Street 1890 Originally rail tunnels, now disused. The world's first electric tube railway, with tunnels only 10 feet 2 inches (3.10 m) in diameter, became disused in 1900 when new 11 feet 6 inches (3.51 m) tunnels to the east replaced them
21 London Underground Waterloo & City line Tunnels Rail 1898
22 London Underground Northern line Tunnels (Charing Cross Branch) Rail 1926
23 London Underground Bakerloo line Tunnels Rail 1906
24 London Underground Jubilee line Tunnels Rail WestminsterWaterloo 1999
25 London Underground Victoria line Tunnels Rail 1971
26 Battersea Power Station Tunnels Utility 1929 (est.) 2 tunnels run under the Thames from the station and arrive on either side of Chelsea Bridge. A third tunnel used to carry steam under the Thames to the Churchill Gardens estate.

Other tunnels[edit]

The figure and list above leaves out a tunnel to the site of the old Ferranti power station on the east side of the mouth of Deptford Creek.

There is also a tunnel between Cottons centre and the old Billingsgate Fish Market near to London Bridge. Citibank used it for cabling at one point; it was large enough for a person to walk through.

The Silvertown Tunnel is a new Thames river crossing proposed to supplement the existing Blackwall Tunnel, which will join the Greenwich Peninsula with West Silvertown.

Background[edit]

London's abundance of river tunnels has resulted from a number of factors. For historical reasons, the city centre has relatively few railway bridges (or for that matter main-line railway stations). Only three railway bridges exist in central London, only one of which provides through services across the capital. Consequently, railway builders have had to tunnel under the river in the city centre rather than bridge it. By contrast, railway bridges are relatively common to the west of the inner city.

Another historical factor has been the presence of the Port of London, which until the 1980s required large ships to be able to access the river as far upstream as the City of London. Until the construction of the Queen Elizabeth II Bridge in 1991, the easternmost bridge on the Thames was Tower Bridge in central London. Even now, the Dartford Crossing provides the only way to cross the Thames by road between London and the sea (with predictable results for traffic congestion). The width of the river downstream meant that tunnels were the only options for crossings before improvements in technology allowed the construction of high bridges such as the Queen Elizabeth II Bridge at Dartford.

See also[edit]

References[edit]

  1. ^ Haswell, C.K. (December 1969). "Thames Cable Tunnel". Proceedings of the Institution of Civil Engineers. 44 (4): 323–340 – via ICE Virtual Library.
  2. ^ Anon (May 1970). "Cables Down Under". Electronics & Power: 175 – via IEEE Xplore.
  3. ^ "Foot tunnels".