The 12 reservoirs there supply about 10 percent of the city's water needs.
The reservoir supplies the most of the drinking water used in Athens.
The reservoir, located on his property, supplied water to the mines and to the town.
It is said that this vast underground reservoir could supply fresh drinking water to the world for 200 years.
This reservoir also supplies drinking water to the near by Ongole city.
When built, it was expected that the reservoir would supply water for municipal use in the Amman region.
He went on: "We have no knowledge that our three reservoirs could supply the city's water and that's what precipitated the 1921 agreement."
The reservoir supplies about 1.8 million people, and also is used for fishing and swimming.
This reservoir still supplies 40% of all of Dublin's water needs.
At present, almost every pond is regulated as though it were a reservoir supplying Birmingham.