Netherlands – Construction work for water projects – RAW-Raamovereenkomst Gepenetreerd Breuksteen

Port of Rotterdam (HbR) manages more than 160 km of slopes. Approximately 30 km of these are slopes consisting of penetrated broken stone. The management of these slopes is handled by the Asset Management (AM) Constructions & Dredging department. New construction or large-scale projects are handled by the Port Development (PD) department. The inspections of the slopes are carried out in-house, thereby monitoring the technical condition. The slopes in the Rotterdam port area are steep and robust with a durable lining, as HbR seeks the boundaries between protecting its shores, maximum space for water and optimal land allocation for its customers on the land side. Based on the use of the harbour basins and the available space, Asset Management selects the most optimal possible lining type. The three most common lining types in the Port of Rotterdam are: 1. Dumped stone; approximately 50 km 2. Blockstone: approximately 80 km 3. Penetrated broken stone: approximately 30 km. HbR makes a decision on the type of slope lining to be applied per location. HbR wishes to conclude a framework agreement with one specialist Contractor for the maintenance, repair and installation work by means of penetrated broken stone. The advantages of penetrated broken stone are the high load-bearing capacity, long lifespan and the limitation of environmental risks in the event of oil spills.