08.03.2021, Bottrop, North Rhine-Westphalia, Germany - Theme photo Emscher reconstruction, the Emscher system will be sewage-free in 2021, new construction of a sewage canal on the Boye, the second largest tributary of the Emscher, the tunnelling machine digs the tunnel for the DN 3500 concrete sewage pipes, the Boye is renaturalized, is transformed into a near-natural watercourse, was previously an open, surface sewer, combined sewer with surface water and wastewater, the ecological reconstruction of the Emscher system consists of the construction of a central sewage system in the Ruhr area, the construction of sewage canals and the renaturation of the Emscher and its tributaries. 00X141113D083CAROEX.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!]