Here's a photo

Image source: www.paul-zimmer.de

By the way: the railway does not pull but pushes the brown coal to its destination.

Here's more information about brown coal:

»»» http://en.wikipedia.org/wiki/Brown_coal

A different look at transport

Image source: Wikimedia

I happened to come across the subject of brown coal, its mining and finally its transport ... quite interesting:

"The lines of the works railway of the company RWE Power (former Rheinbraun) in the Rhenish brown coal area are electrified with single-phase AC current of 50 Hz at a nominal voltage of 6 kV which is different from the railway current/voltage common in Germany (15 kV at 16 2/3 Hz). In view of the large quantities transported the locomotives need high pull force, therefore the electric locomotives have all been specially designed. So, the locomotives of the EL 1 series were the first electric locomotives with thyristor controller worldwide and thus a milestone in the development of rail vehicles."

»»» Further information see Wikipedia