Thippagondanahalli Reservoir, also known as T G Halli Dam or Chamarajsagar, is located at the confluence of the Arkavathy River and Kumudavathi River, 35 km west of Bangalore, India. It is used by the Bangalore Water Supply and Sewerage Board (BWSSB) as a major source of drinking water for western Bangalore.The lake is a man-made reservoir, created by the building of a dam which was inaugurated in 1933. Bharath Rathna Sir M Visvesvaraya supervised the construction work.