Deep ditch
Tieflachgraben is a water body name:
- Tieflachgraben (Federbach) , left tributary of the Federbach near Durmersheim , Rastatt district, Baden-Württemberg
- Tieflachgraben (Neugraben) , right tributary of the Neugraben (to the Otterbach ) near Minfeld , Germersheim district, Rhineland-Palatinate