Excavator Works with Bucket to Clear Mud Sludge and Debris from the Bottom of the Drained River

mud dredging dredging drained river land reclamation excavator moves deep mud cleaning river excavator works river bottom river clean river regeneration project large excavator timelapse waterways backhoe river flow excavator bucket mud machine construction equipment yellow excavator digger sludge canal debris reclamation excavator operator polluted ground mechanical digger equipment rental water rubble dirty breaking angle improvement sink safely littery banks contract iron arm caterpillar powerful engine impure grab strong arm business