Extension of the Rotberg rainwater storage reservoir completed28.11.2006
The main company in charge of the construction project was Gottlieb Tesch GmbH in Stahnsdorf/Brandenburg. The other companies involved in the construction work also come from the Berlin-Brandenburg region, including PRB Spezialtiefbau GmbH (sheet piling), Schulzendorfer Elektro GmbH (electrical/EMSR work), Brechtel Spezialtiefbau GmbH (drainage), Schlosserei Heinisch (locksmith work), Schröck Landschaftsbau GmbH (landscaping) and Dirk Teuchert Elektro- und Zaunanlagenbau (fencing). VAG-Armaturen GmbH in Mannheim was responsible for hydraulic engineering.
Before commencing with the expansion, Berlin Airports worked on upgrading the Rotberg rainwater storage reservoir and the Selchow flood ditch between April 2005 and April 2006. As part of the contaminated site clean-up for expanding Schoenefeld Airport to the BBI Airport, contaminated mud from GDR times was removed and professionally disposed of.