About 80–90% of the ponds in the Upper Harz Water Regale were created in the 16th and 17th centuries, whilst the system of dam ditches was further expanded in the 19th century.
Omkring 80-90 % av dammarna i Oberharz vattenregale skapades under 1500- och 1600-talet,, medan systemet med diken ytterligare utvidgades på 1800-talet.