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

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