Tsurumi Pumps Power Landmark Berlin Stormwater Infrastructure Project

A major milestone is approaching in one of Berlin's most important water infrastructure projects. Construction of a new 30-metre-deep stormwater overflow basin began in January 2025, and after around 18 months of continuous dewatering, the project is now preparing for its first test flooding.

Throughout the construction phase, groundwater and surface water have been reliably collected in pump sumps and removed using Tsurumi submersible pumps. For this demanding application, our trusted market partner Biergans Pumpen-Vertrieb GmbH selected Tsurumi's robust LH series, which has delivered virtually wear- and maintenance-free operation under challenging site conditions. As the project progressed and operating conditions changed, the originally installed LH 23.0 was complemented by the even more powerful LH 25.5, ensuring maximum performance and reliability throughout every stage of construction.

With the completion of the basin now in sight, Berlin's impressive Stormwater Overflow Basin No. 4 is almost ready for its test flooding. The drainage process will once again rely on Tsurumi technology, with two GPN622 pumps equipped with protective cages standing by for operation.

From the very beginning, Biergans Pumpen-Vertrieb GmbH has supported this flagship project with premium Made in Japan pump technology and outstanding technical expertise. The upcoming test flooding marks another significant milestone as this major infrastructure project moves towards completion.

Once operational, the underground basin will provide a storage capacity of 16,750 cubic metres—equivalent to approximately four and a half modern Olympic-sized swimming pools. It forms an important part of Berliner Wasserbetriebe's long-term Storage Capacity Programme, designed to strengthen Berlin's stormwater management infrastructure and help protect the city's waterways during heavy rainfall events.

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