A pump on an excavator boom
A pump on an excavator boom. Not photoshopped.
A submersible slurry pump with an agitator is lowered right into the mud: into a sump, a settling pond, a pit of sand. The agitator lifts the sediment, the pump takes it, and the excavator moves the whole unit to wherever the mud is thickest.
Cleaning settling ponds, quarries, sand filling — where an ordinary pump clogs within an hour.