Bucket-wheel excavator removes overburden at coal mine
Hornbach, Germany

This bucket-wheel excavatoris removing the top layer of earth
which will be transported via conveyor and deposited in another, exhausted, part of the mine.
After the machine takes all it can reach from this layer of earth,
it and the conveyor system will be moved so more earth is within reach.
Another excavator follows, taking the layer on which this one stands.