Yellow Excavator Works with Bucket to Clear Mud Sludge and Debris from the bottom of the Drained River-3

mud dredging excavator works dredging large excavator yellow excavator excavator operator iron excavator mechanical excavator backhoe excavator bucket cleaning river mechanical digger drained river mud machine deep mud digger timelapse regeneration project clean river river bottom equipment rental repair work sludge waterways river workmen canal debris sinking ground water polluted dirty powerful engine rubble nature contract littery beach caterpillar drive safely banks grab arm driving man impure business