Wiehlmünden Reservoir

"... In order to be able to cover the constantly increasing energy demand in the Aggertal dam, in addition to the construction of the Aggertalsperre, the construction of eight compensation ponds below the Aggertalsperre was necessary in order to provide the engine owners with sufficient water at the start of work. These were the Dümmlinghausen, Derschlag Osberghausen, Wiehlmünden, Haus Ley, Ohl-Grünscheid, Ehreshoven I and Ehreshoven II barrages. The Derschlag dam was dismantled in the early 1980s. The Agger has undergone profound changes by people since the industrialization of the Agger Valley With the construction of the Aggertalsperre, the companies were able to reliably generate electricity from their turbines, the water flowed off evenly, winter surplus was released in the low-rainfall summer, and the areas along the Agger were protected from flooding ... "
Source: aggerverband.de/talsperren/stauweiher/stauweiher-osberghausen

Dozens of swans, ducks and geese in intimate harmony on the shallow waters.

Small recreational area with open water access and nice rest areas.