Tunnel de Saverne

Tunnelling at TGV speed More information under https://www.herrenknecht.com/en/media/press-information/archive/2012/tunnelling-at-tgv-speed.html

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The River Emscher was considered a "cesspool of the Ruhr": an open channel, extremely polluted with wastewater from coal mining and heavy industry and the feces of local residents. It is a sewage project of superlatives: 10 Herrenknecht-TBMs were used to build an efficient underground pipe and tunn