Wells are drilled around the excavation pit. The water depth in these is always measured with probes. The pumps and probes in the wells are connected to a powerful pump control system, which is located in mobile outdoor control cabinets. The robust cabinets contain a PLC with several redundant power supply units and a UPS. These control cabinets also have a connection to the mobile phone network. This enables communication with the PLC via a VPN tunnel. Any faults such as power failures or errors in a measuring device are reported immediately by SMS and e-mail. Regular pinging ensures that communication is always maintained. This also detects a total failure.

During construction work, the groundwater in the excavation pit must be lowered if it is lower than the groundwater level.