The parking garage consists of 3 underground levels. The depth that was dug away was approx. 11,0 m. The walls of the building pit have been made with cement betonite walls, in which a steel sheet
pile wall was hung.
For the closure of the soil of the building pit, a water restraining layer between NAP -24 m and NAP -29 m was used. This layer is however not entirely reliable, and therefore over part of the building pit a layer has been injected into the soil at NAP -27 m.