TAMIL NADU

Desalination plant awaiting completion

K. Lakshmi

30-km pipeline from the plant to Red Hills laid recently



The pipeline work funded under JNNURM was executed at a cost of Rs.93 crore

Work comprised construction of pumping station and underground tank at Minjur, Madhavaram



CHENNAI: The 30-km pipeline from the upcoming 100 million litres a day desalination plant near Minjur to Red Hills has been laid by the Chennai Metrowater recently. However, a portion of construction work of the plant is yet to be completed.

Metrowater officials said the pipeline covering about 30-km would transport treated water to Red Hills treatment plant via areas such as Minjur and Madhavaram.

The pipeline-laying work was funded under Jawaharlal Nehru National Urban Renewal Mission (JNNURM) and completed at a cost of Rs.93 crore.

The work also comprised construction of a pumping station and underground tank each at Minjur and Madhavaram and six million litre capacity underground tank in Red Hills.

While the facility at Minjur would be used to receive water from desalination plant and transport to Red Hills, the pumping station and underground tank at Madhavaram would also be utilised to supply water to Madhavaram municipality as part of the comprehensive water supply scheme, an official said.

Similarly, an underground storage with a capacity of 2.5 million litres has also been built to supply drinking water to Manali.

On the construction of desalination plant, the officials said the project to construct various units such as sand filters, cartridge filters and reverse osmosis units had been completed.

However, offshore construction comprising the laying of a separate pipeline to draw seawater from 10 metre depth below sea level and discharge waste water await completion.

Chennai Water Desalination Limited, a special purpose vehicle formed by IVRCL Infrastructures and Projects Limited, has been involved in the project on DBOOT (design, built, own, operate and transfer) basis.

Nemmeli desalination plant

Meanwhile, tenders have been invited for setting up desalination plant of a similar capacity in Nemmeli, located about 35 km south of Chennai.

A Metrowater official said that bids, which need to be submitted by June-end, would be scrutinised after which the work contract would be issued.

Tenders for conveyance pipeline

Tenders would also be floated for the work to lay conveyance pipeline from the plant at Nemmeli to proposed underground tanks and pumping stations at Akkarai, Thiruvanmiyur, Velachery and Pallipattu.

Bids from consultancy firms for project management and supervision would also be invited in July, the official said.

The evaluation process would take about six months after which the work on project would be commenced.

The project period funded under JNNURM is 24 months, the official added.

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