 The Hesaraghatta dam is an earthen bund of with a total height of creating the Hesaraghatta Lake (reservoir) with storage of 997 M.Cft at full reservoir level with a lake surface area of .Water from the reservoir is taken through initially a 1.4 m dia (42" dia) Hume pipe to the Soladevanahalli Pumping Station by gravity and then pumped (using steam pumps initially and later changed to electric pumps at Soladevanahalli) against a head of 115 to 135 m to the Combined Jewel Filters (CJF) plant at Malleswaram for treatment and supply to the consumers in the city.When the Hesaraghatta Lake started drying up in the year 1925, as an urgent remedial measure, another dam was built to create a reservoir called the Chamaraja Sagar at TG Halli, downstream of the Hesaraghatta Lake.