New plant to cost over Rs 3,000 crore BMC floats fresh tender to construct desalination plant at Manori

Indian Express

2 days ago

The Brihanmumbai Municipal Corporation (BMC) has once again floated a global tender for constructing a 200-million litres per day (MLD) desalination plant in Mumbai's Manori island. The comes eight months after the civic body scrapped the previous tender which was floated in December 2023.
A desalination plant is a facility where the saline water from the sea is scientifically treated by removing the salt extracts and mineral from it to make them fit for potable usage. Globally, desalination plants are popular in countries like Israel which have minimum access to natural potable water like rivers and lakes but are close to the sea.
Civic officials said the new tenders were floated following a project feasibility study that was carried out by the Tata Consultancy Services (TCS) identifying some of the key causes because of which the tender failed to attract a good number of bidders. Speaking to the Indian Express, Abhijit Bangar, additional municipal commissioner (projects), said the previous tender was floated by using the Swiss challenge method under which an initial proposal is published based on the bids submitted by a particular party following which other parties are invited to submit counter-proposals that either match or improve upon it.
'The first tender was live for nearly a year and we had called for bids three times out of which we received response only once and that one bidder later got disqualified. Following this, we carried out a survey and the new tenders are being floated by using the conventional engineering-procurement and consultancy (EPC) method which is the usual way through which all interested bidders can submit their bids at the same time which is followed by the evaluation process,' Bangar told Express.
According to the previous tender, the estimated cost of constructing the plant was pegged at Rs 2,000 crore while Bangar said the base price of constructing the plant as part of the new tender is being pegged at Rs 3,000-Rs 3,200 crore. He also said the capacity and most of the technical specifications of the plant remains the same in the new tender.
'The reason for cost escalation is that the new plan will include three underground tunnels–two of which will bring in sea water to the plant for treatment and one tunnel will serve as an outfall for the treated inert materials that will be left following the treatment. This process will involve electrical and mechanical interventions due to which there has been a cost escalation. The final cost estimates were prepared and calculated by the consultant only after checking quotations from prospective agencies that have expertise in the field,' Bangar said. He also added that the water into the plant will be drawn 2.5 km from the shoreline where the sea is deep.
The plant will come up in a 12-hectare plant at Manori village which is a fishing hamlet in northern fag end of Mumbai. The plot where the plant will come up is owned by the state government and civic officials said the process of transferring the land to the BMC is in the final stage.
The proposal of constructing a desalination plant was first mooted in 2019 as a solution to counter the issue of growing water demand in Mumbai which requires 4,250 MLD of water daily while the civic body is able to serve only 3,900 MLD, making a deficit of 300 MLD. This will be the first desalination plant in Maharashtra.
At present, Mumbai is dependent on seven lakes–Tulsi, Vihar, Tansa, Bhatsa, Modak Sagar, Upper Vaitarna, Middle Vaitarna which are located in suburban Mumbai, Thane, Palghar and Nashik. The catchment area of these lakes gets filled during the monsoon following which water is transferred to Mumbai's pockets through pipelines and tunnels.