Stock Photo - 18 September 2018, Hamburg: Andreas Heinicke, machine operator of the tunnel borer for a new sewer shaft, is working on the boring head after the breakthrough of the tunnel borer in the target shaft. With a large wastewater storage facility in the city centre, Hamburg Wasser wants to improve the quality of water bodies in the Hanseatic city and prevent the consequences of climate change. On Tuesday, the underground tunnel borer reached its target shaft in the Hoheluft district. The new sluice is intended to absorb larger quantities of rainwater, some of which have so far flowed into the Isebek Canal after heavy rainfall. (on dpa ""New waste water level for better water quality in the city centre"" of 18.09.2018) Photo: Christian Charisius/dpa. - Hamburg/Hamburg/Germany