Excavations of the Amstel river bed were organised in three sections and went as deep as the natural deposits up to 25-33 meters below street level. Two locations are metro stations (Stationsplein and Rokin) and one is a tunnel shaft to get the drill into place (Damrak). Rubble was collected in big bags and sieved on the street. Also, in situ digging could be done following river stratigraphy. Research questions touch the early development of Amsterdam and of course the natural landscape.