Dewatering or lowering within a trough excavation pit. All wells were equipped with conveyor systems. The extracted groundwater was drained into the Alsterfleet via a sand trap with a neutralization and de-icing system. The water levels within the excavation pit were monitored using 7 internal gauges. The entire system was maintained and operated over 667 calendar days. After the dewatering was completed, all bridges and GWM were dismantled in accordance with official specifications.