Polsterberg Pumphouse
The cushion Berger Hubhaus is a pump house above the dam trench in the Upper Harz, which is now used as forest restaurant.
As part of the Upper Harz Water Regale was built in the 18th century and served to the level of the highest pond, pond Hirschler to raise the needed in Clausthal in the Upper Harz mining water from the dam to the trench. Without this " boost " provided or provides the dam ditch the water over ditches and watercourses to the house Herzberger ponds or to the Lower Peacock Pond (see also Middle peacock pond). The problem, however, was that of all the richest silver mines in the Upper Harz mining, the pit and the pit Caroline Dorothea lay on higher level and could be supplied with power from the water only Hirschler pond from.
The driving force for the wooden lift pump was recovered in Polstertal below by two water wheels. The surcharge water for these water wheels was introduced on the Heller Taler digging out of the Hellertal and from the Fortuner pond on its basic trench, due to the Reibunsgverluste and poor efficiencies certainly a multiple of premium water was required to raise only a few liters of dam grave water. This art wheels transferred the recovered power over 260 m and 560 m long rod of wood art in the Hubhaus on the cushion mountain. In Hubhaus the water of the dam trench was pumped 18 m up and into the potions ditch, through which it could then be supplied either via the Hutthaler ditch and the Huttaler cons balance the Hirschler pond, or via the Jägersbleeker watercourse the Jägersbleeker pond. The cushion Berger Hubhaus served as official residence for the Hubmeister and the grave keeper, as well as a bar-room.
Beginning of the 20th century, the wooden structure was replaced by an electrically operated pump that is still present in the original in the pump house at the trench. The building is now a protected monument. It is operated exclusively as a restaurant and is a popular destination for hikers from Altenau and Clausthal- Zellerfeld. Like the closely located Sperberhai Dammhaus it is up to the resin Elevated Road, the main road 242