The former industrial area is divided into a generous river and floodplain area without buildings and a correspondingly denser urban development area. The resulting generous recreational and natural area is derived from the natural course of the Birs, which originally flowed through a floodplain here. The resulting geometry of the development strip, with a depth of approximately 110 to 150 metres, allows the entire development to be credibly related to the river space. The concentration of motorised access along the railway has only a minimal effect on the river space. With this simple and clear separation, a waterfront development on a unique and high-quality natural and landscape space, the Dornacherauen, is created from an industrial area that is today inconveniently located between the hollowed river and the railway embankment.