Cutter-suction dredger looses the soil to mix with the water by cutter, and pumps the mud by dredge pump.

This paper presents associated technology design and application of a dredge pump unit in the rehabilitation project in Cline Shipyard, Sierra Leone.

One would create two basins one on top of the other the space between the two basins would allow a dredge pump to access the bottom of the lower basin.