Water Supply & Sources – Hessarghatta Lake
|Hessarghatta Lake||Chamaraja Sagar Reservoir||Cauvery Water Supply Scheme|
Sir K. Seshadri Iyer, the then Dewan of erstwhile Mysore province thought of providing water supply to Bangalore through a source of perennial character by building a reservoir across river Arkavarthi which could store three years, supply to the city. In accordance with the above, the first scheme of protected water supply , “Chamarajendra Water Works” was undertaken in the year 1894, the source of supply being Hessarghatta lake on the Arkavathi river.
The population of Bangalore city was 1,80,000 in 1891 and a tank was designed to supply water to a population of 2,50,000 with a 57 LPCD. Population was assumed to increase at 16% per decade, and, it was anticipated that the infrastructure would be sufficient to meet the city’s needs for 3 decades thereafter.
However, the anticipated population of 2,50,000 was attained by 1922 itself. The inadequacy of supply which had begun to be felt from 1918 became acute by 1925, when Hessarghatta lake went almost dry for a year and a new source had to be thought of by that time.
Hessarghatta lake is situated at a distance of 18 kms to the North West of the City. Raw Water is drawn from the reservoir viz. 42″ dia Hume Pipe to the Soladevanahalli Pumping Station by gravity and from there through 3 Nos. of CI Pipelines i.e two to CJF and other to the HMT Factory, pumping water against a Head of 115 mts to 131 mts. The raw water received at Combined Jewel Filters (CJF) Malleswaram was treated and then supplied to the consumers.