is a river in North Rhine-Westphalia
. It flows through the foothills of the Eifel
, and joins the Rhine
river. It's origin is near Nettesheim, and its mouth in Neuss
. The river is 103 km long, which is significantly shorter then it was originally. Due to the open pit mining
in the Hambacher Loch
the flow of the river had to be changed.