Second Chennai title
 

Background :

The origin of the Chennai water supply system dates back to the year 1872 when the nucleus of the present system was formed. Later the system was gradually expanded over the years. Water was drawn from Red Hills lake through masonry conduits and treated at Kilpauk and distributed through radial trunk mains. 
The Project : 
 
The Second Chennai Water Supply Project was initially taken up for implementation in 1995 with World Bank assistance and with a schedule to complete all works by 2002. The major objectives of this project are 
  • Improvements to the sources of supply, treatment, distribution of water within Chennai city and 
  • Strengthen conservation of water by physical means such as leakage detection and repair 
  • Expansion and rehabilitation of the sewage collection, conveyance treatment and disposal system. 
This project was initially estimated to cost Rs.54,63.12 million and later restructured and revised to cost Rs.7787.899 millions. World Bank approved a loan of US$ 86.50 million for this project which would provide about 65.5% of the total project cost including taxes and duties. 
Projects consists of the following components

i) Unfinished works from the first project
The major items of works which are included in this component are construction of clear water pumphouse at Red hills, installing archemedian screw pumps at Koyambedu sewage treatment works and improvements to 16 sewage pumping stations.

ii) Clear water transmission mains 
In order to have equitable distribution of water to the consumers, the city is divided into 16 water supply zones. Each zone was proposed to be provided with a water distribution station which are connected by clear water transmission mains from the treatment plants. Under the Second Chennai project, 6 numbers of transmission mains viz. K.K.Nagar to Ekkattuthangal, Madhavaram to Vyasarpadi, Porur to Kathipara, Kathipara to Pallipattu, Pallipattu to Mylapore and Velachery to Velachery water distribution station were taken up and completed. An additional branch transmission main from Purasawalkam to Triplicane and Kannappar Thidal distribution station was also taken up later and completed. 

iii) Water distribution station 
All the 7. Water Distribution Stations taken up under this project, viz Patel Nagar, Kolathur, Palipattu,Vyasarpadi, Mylapore, Nandanam and Velachery have been completed and commissioned.

iv) Local Distribution system 
Under this component additional pipelines are laid to strengthen the distribution system so that water is made available to all consumers at a pressure of atleast 7m at their ferrule.  The work involves laying of about 660 km.of pipelines in the 11 zones (Patel Nagar, Vyasarpadi, Kolathur,  Kannappar Thidal,Choolaimedu, Mylapore, Nandanam  Valluvarkottam ,Palipattu, Ekkattuthangal, Velachery ) are completed.

v) Water conservation 
Under the Leak Detection and repair, 20% of the city has been covered in the first project under two phases. A third phase covering about 15% of service connection was taken up and completed under this Project. Works in the remaining 65% areas have been taken up for conducting leak detection tests and renewal of all house service connections using MDPE pipes and replacement of corroded and choked up mains wherever necessary. All the works contemplated are completed.

vi) Technical Assistance 
Under this component, provision has been made for the project preparation and consultancies for the detailed design and Engineering for water distribution, sewage collection and conveyance, sewage treatment facilities, environmental impact assessment etc. totaling about 12 nos. All these works are completed except 2 Nos. Presently, Twinning arrangement consultancy is in progress. The object of this consultancy is to work along with the experts of a well developed water utility so that improved practices are implemented and operational efficiency of Metrowater is enhanced. Consultancy for study on Araniar - Kosataliyar aquifer has been taken up and is in progress. This study will assist CMWSSB to asses the water potential , abstraction and supply of additional water to chennai.

    

 LAST UPDATE 22.12.2005

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