Hohenfelder Mühlenau
The Hohenfelder Mühlenau is a stream, about 10 km (6.2 mi) long, in the district of Plön in northeast part of the North German state of Schleswig-Holstein.
| Hohenfelder Mühlenau | |
|---|---|
| Location | |
| Location | Plön district, Schleswig-Holstein,  |
| Physical characteristics | |
| Source | |
| ⁃ location | Source: Selenter See between Köhn-Pülsen and Giekau-Warderhof |
| ⁃ coordinates | 54°19′09″N 10°27′48″E |
| Mouth | |
⁃ location | Kiel Bay near Hohenfelde-Malmsteg |
⁃ coordinates | 54°23′07″N 10°30′35″E |
| Length | 10 km |
| Basin features | |
| River system | Hohenfelder Mühlenau |
| Landmarks | Villages: Köhn, Schwartbuck, Hohenfelde |
The Hohenfelder Mühlenau is classified as a gravel-bedded stream. It begins at the Selenter See in Holstein and, together with the Salzau / Hagener Au, is one of its natural tailwaters. The course of the stream has an incline of about 4%, a length of 10 km (6.2 mi), a width of generally between 2 and 4 metres (7 and 13 ft) and a depth of 0.1 to 1.5 metres (4 to 59 in). It is interrupted by two barriers, the mill at Köhn, which has fallen into ruins leaving just a foundation behind, and poses an obstacle of 2 to 3 metres (7 to 10 ft). This hurdle will now be bypassed, in line with the EU Water Framework Directive, using a drop structure (Sohlgleite) which will be built next to the existing building. The Hohenfelde Mill is another obstacle of about 4 metres (13 ft), which is partly bypassed with a fish pass. The existing 50 hp Francis turbine is still an obstacle however. At the end of its course the Hohenfelder Mühlenau discharges into the Baltic Sea with a water quality class of I-II.