Complex sentence: Its route on the sand, gravel and clay soils along the Vils was straightforward enough and only near Dorto did it have to cross the Petzenbach stream on a 6 metre long bridge.
Split into simpler sentences: Its route on the sand, gravel and clay soils along the Vils was straightforward. Only near Dorto did it have to cross the Petzenbach stream on a 6 metre long bridge.