sentences:  Early on in the 20th century (1909), Erdesbach got its own centralized waterworks.The system was fed by several walled-up surface wells.After these wells began to run dry in the early 1970s at a time when demand for water was always steadily rising, Erdesbach had to link itself to the “Ohmbachtal” special-purpose association's water supply at the same time as the municipality was seeking to expand its new water supply network.