The Netherlands has many cities and villages with urban water which are still contaminated with silt. Before undertaking dredging works, we try to find environmental and economically interesting solutions by maximising the use of the silt into valuable resources.
In the city of Borculo, several ponds and canals were mechanically dredged by using floating bulldozers. Special slurry trailers transported the dredged material and this was pumped into a temporary dewatering site, next to the city centre. After dehydration, the dewatering site was separated into 2 flows: re-usable sand (raw construction material) and (fertile) soil. Finally, we cleaned the canal ‘De Berkelzomp’ using a unique hydraulic method. The dredged material was ‘stored’ into geotextile containers. These were used to restore the poor condition of the embankment of the waterway.
Significant cost savings, development and reinforcement of the existing shoreline and embankment were achieved.