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Feeding ducks and geese according to §55 of the Administrative Offenses Act and punished with a fine of 30 euros. This is not to annoy you. It serves to protect the animals, the cleanliness of bodies of water and bank areas and to avoid rats from leftover food lying around.

The lake is fed by the Harpener Bach, which flows through the lake from north to south and drains it into the Ruhr via the Oelbach. In the Middle Ages, two mill ponds were created as precursors to the lake at the mill of the Schulte-Suntum farm. With the construction of the Dorothea-Erbstollen at the Vollmond colliery, contamination with mine water began in the 18th century. In order to clarify the mine water, settling ponds were created. One of these settling ponds was created southwest of the Schulte-Suntum farm. While the main part of the water flowed directly into the settling pond, there was a ditch on the eastern side as a bypass that met the stream again below the pond outlet. When the Robert Müser colliery closed in 1968, the tailings pond became unnecessary. In 1976, the facility was expanded into an integral part of a local recreation area through excavation and bank and lake bottom reinforcement. https://www.bochum-tourismus.de/bochum-entdecken/parks-und-gaerten/uemminger-see.html#c10307

The Ümminger See in Bochum-Langendreer is a popular local recreation area for young and old, with a great playground and a roller skating rink. The lake is not only a popular destination for families, walkers and athletes can also find relaxation and sporting activities here. It can be walked around within two kilometers - a great distance for regular running training. https://www.bochum-tourismus.de/bochum-entdecken/parks-und-gaerten/uemminger-see.html#c10294

Impressive building and now almost 150 years old.

The Ruhr Viaduct in Herdecke spans the valley with a length of 313 m and 12 semi-circular arches, each with a span of 20 m.

The weir seen from the bridge has four openings closed with hydraulically operated flaps. Next to the weir are the fish ladder and the boat alley. In the case of large floods, the entire system is flooded. In 2011, a hydroelectric power station was built on the right side of the weir. The entire Ruhr flows through the power plant and enables electricity to be generated by around 3.6 million kWh annually.

The weir has four openings that are closed with hydraulically driven flaps. Next to the weir are the fish ladder and the boat alley. In the case of large floods, the entire system is flooded. In 2011, a hydroelectric power station was built on the right side of the weir. The entire Ruhr flows through the power plant and enables electricity to be generated by around 3.6 million kWh annually.

The houses on the edge above are called Gibraltar