Gruttbach

Gruttbach is a small river of North Rhine-Westphalia, Germany. It flows into the Haferbach near Lage.

== Geography == The Gruttbach originates in the Billinghausen district of Lage on the north slope of the up to 206 m high Hörster Egge, not far from the L 945. From its source, the stream flows in a northern direction to Billinghauser Heide, where it joins the Gruttbach II. In the further course, the stream passes through Kachtenhausen and Ohrsen to the east and, right-banked, flows into the larger Haferbach behind the former Ohrsen sewage treatment plant (now Ohrsen pumping station). In terms of catchment area, length, and water flow, the Gruttbach is the largest tributary of the Haferbach.