A Widerwaage is the name used in the region of the Upper Harz Water Regale for a small basin or small impoundment. This particular basin is impounded by a small wooden weir structure, a so-called Fehlschlag. It is linked by the Huttal Water Tunnel (Huttaler Wasserlauf) with the Hirschler Teich on the other side of the ridge and is designed so that the two reservoirs act as a communicating vessels. Water from the Schwarzenberg and the Polsterberg Pumphouse is supplied to the Widerwaage by the Huttal Ditch (Huttaler Graben). If the weir is full, water is drained out of it through the Huttal Water Tunnel to the Hirschler Teich. There it was used to supply hydropower for the very productive Caroline and Dorothea Pits.