Ahrensfelde - North-east of Berlin, directly behind the Berlin / Brandenburg state border, a large shaft construction project started on October 5, 2020, on behalf of Berliner Wasserbetriebe: In Berlin-Lindenberg, the Plant Engineering Division built the Lindenberg intermediate pumping station by May 2022.

The pumping station originally consisted of six circular clean water tanks (RWB) with a storage volume of 20,000 m³ each, as well as an operations building housing the clean water pumps and staff rooms. The pure water tanks with a usable volume of 68,000 m³ were filled by feed pipes from the Friedrichshagen waterworks. Increasing structural and operational problems with the existing plant necessitated a new building, which was to be constructed to the north of the existing RWB. The new construction of the four water tanks as flow-through tanks and a machine hall integrated in the overall structure guarantees the drinking water supply and solves occurring quality problems at the Lindenberg site. During the entire construction phase, a usable tank volume of 68,000 m³ must be available to ensure the supply of drinking water at all times.

The contract for the new construction of the clean water tanks includes the complete piping of the machine house with Abcite-coated steel pipes up to DN 1,800 as well as the supply and installation of galvanized steel construction platforms and levels in the machine house, various pumping equipment, all butterfly valves, PA pieces and other fittings and UV equipment, some of which are custom-made. Under project manager Marcus Günther, Schachtbau also carried out the PE pipeline construction, the equipping of the clean water tanks with DN 1,000 stainless steel pipes and steel construction elements such as stainless steel railings, access walkways and stairs. Disinfection of the installed piping components, the technical building equipment and the installation of an emergency power system are also part of the scope of services provided by the shaft builders. The six clean water tanks previously in use remained in operation during the conversion until they were finally taken out of service due to partial commissioning of the newly constructed tanks or pipeline connections. Site assembly took place from 2020 to 2022 so that the new plant could be commissioned on June 22.