Rottenbach (Ilm)
| Rottenbach | ||
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| Data | ||
| location | Thuringia | |
| River system | Elbe | |
| Drain over |
Ilm → Saale → Elbe → North Sea
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The Rottenbach is a 4.34 kilometer long tributary of the Ilm in the urban area of Ilmenau in the Thuringian Ilm district .
It rises at the 580 meter high Oberpörlitzer Höhe a little west of the town of Oberpörlitz . Initially, it continues to flow southeast towards the city center. It feeds the bush oak and forms a valley cut in which the railway line to Erfurt runs. The Rottenbach now changes its flow direction to east and flows through the Kaltebadsteich as well as the brewery ponds of the Jäcklein brewery and the Ratsteiche .
On this section it formed the border between the Ilmenauer Stadtflur in the south and the Unterpörlitzer Ortflur in the north until 1981 .
Due to the Rottenbach, the area between Ilmenau and Pörlitz is relatively swampy, so that it cannot be built on and represents an inner-city green area. There are some allotment gardens here. The stream then crosses under the B 87 (Bücheloher Straße) and changes its direction of flow to the south.
The Rottenbach feeds the Ilmenau ponds , which are the largest wetland in the region. It was branched out so that its water reaches all six ponds (Prinzessinnenloch as well as Großer, Brandenburger, Dixbixer, Stein- and Neuhäuser pond). To the south of these ponds, the Rottenbach in the Krebswiese area was partly filled with water from the Ilm via a ditch and expanded into a Mühlgraben. There used to be a few mills on its lower reaches. Today the ditch leading to the Ilm has been filled. The Rottenbach joins the Ilm on the left at the Fischerhütte in the southeast of Ilmenau .
A street in the north of downtown Ilmenau was named after the Rottenbach : Rottenbachstraße . It was created in the 1920s to 1930s. The Rottenbach is partially piped in the Ilmenau urban area.