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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. == Other tunnels == The figure and list above leave out at least three tunnels: under the Thames Barrier; the 2.8m diameter tunnel carrying electricity cables from West Ham to the Greenwich Peninsula constructed up to 1999 for the Millennium Dome; and 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 man to walk through. The Crossrail project, authorised in 2008, will see a further pair of rail tunnels constructed between North Woolwich and Woolwich. The first Crossrail trains are due to run in 2017. 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. There is also a further tunnel about two miles east of Gravesend for electricity cables presumably only accessible by authorized personnel 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tunnels underneath the River Thames」の詳細全文を読む スポンサード リンク
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