Almost half of the sea floor in the northwest is designated as a nature reserve, of which 125 hectares take up the hen open space flat water and island zone in the Altmühlsee, which is made up of fairly a few individual islands. The lake extends about 1300 meters from north north -east to south -southwest and has a water surface of 23 hectares at a depth of up to 4.5 meters. Some smaller places in the southwest are only some hundred meters away from the lake. Across the ditch, an outer wall extends to the southern tip, which nonetheless measures 50 by 60 meters on its outer edge. From the south the ditch continues to be flowed via a small stream. The north bank of the Brombachsee rises to the splitter cherry and hop country, and within the south the low mountain range of the cocks rises. The Grafenmühle was equipped with 4 water wheels until the 20th century; Three wheels drove grinders, a bike a sawmill. The three talked about have been created as a part of the recultivation and renaturation of the remaining opencast mines created by the previous lignite mining and its amenities. On the air side of the dam, on the operating outlet, is the Brombachsee energy house, which might generate electricity from the water launched into the lower reaches of the Brombachsee with two by way of-move turbines, each with a design output of 315 kilowatts, with a useful gradient of 32 meters.
