The collector was in poor condition and was partly renovated and partly rebuilt, either in open trenches or by means of thrust boring. This method was used in the existing nature reserves and near the entry and exit complex. To meet modern hydraulic requirements, 12 overflows, 3 underground storage basins and one open buffer basin were built. An extensive project of more than 5 kilometres of sewerage was connected to each other to guarantee the drainage for 33,000 people. During all this, the collector remained permanently active. This makes this project one of the largest non-combined sewerage projects for both Aquafin and BESIX Infra.