Sankey tank, a manmade lake or tank, is located in the western part of Bangalore in the middle of the suburbs of Malleshwaram, Vyalikaval and Sadashiva Nagar. The lake covers an area of approximately 15 ha. At its widest, the tank has a width of 800 m. Sankey tank become built by using Col. Richard Hieram Sankey of the Madras Sappers Regiment, in 1882, to fulfill the water supply demands of Bangalore. The tank turned into also known as Gandhadhakotikere, as the Government Sandalwood Depot used to be located close to the lake.
Sankey reservoir became built in 1882 and the works value Rupees 575000. It was connected to the Miller's tank and Dharmambudhi tank and changed into built as a guard towards water shortages, which includes that skilled within the Great Famine of 1876–78. The best of water become no longer excellent and when Lord Connemara, Governor of Madras visited Bangalore on July 1888. A nearby wit commented, "The men who're thrown off their horses and killed on the spot at Bangalore are the simplest ones that are allowed with the aid of docs no longer to have died from drinking terrible water".