Oberhausen, Ruhr area, North Rhine-Westphalia, Germany, Emscher conversion, new construction of the Emscher AKE sewer, tunnel driving using the tubbing method at shaft 26, double pipe system, DN 2600, work processes in the shaft during driving, the ecological conversion of the Emscher system consists of building a central sewage treatment system in the Ruhr area, the construction of sewers and the renaturation of the Emscher and its tributaries.

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Photo credit: © Rupert Oberhäuser / Alamy / Afripics
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