16.06.2016, Oberhausen, North Rhine-Westphalia, Germany - Emscher conversion, new construction of the Emscher AKE sewer, tuebbing tunneling at shaft 26, double pipe system, DN 2600, working procedures at the shaft during the tunnelling, workers unlock a delivery with tuebbing stones, the ecological conversion of the Emscher system consists of the construction of a central sewerage clarification system in the Ruhr area, the construction of sewers and the renaturation of the Emscher and its tributaries. 00X160616D1279CAROEX.JPG [MODEL RELEASE: NO, PROPERTY RELEASE: NO (c) caro images / Oberhaeuser, http://www.caro-images.com, [email protected] - In case of using the picture for any purpose, please contact the agency - the picture is subject to royalty!]