Eating mountains

Just a few km on the other side of our border with Germany huge machines roam and eat the landscape like giant dinosaurs. No joke.
It's an open browncoal mine, used to produce electricity, and vast areas (50 km2!) are being excavated. Countless villages had to be moved for this project
These machine are huge, 100 meter high and 240 meter long. 
I made this drawing for a friend of mine who organizes a vintage car tour (MGs) in the area around the excavation. The image was used as sign.