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The BMC has issued a INR 3,000 crore tender to construct the Gargai dam in Palghar, Maharashtra, along with a 1.6km tunnel connecting it to the Modak Sagar reservoir. Initially approved in 2013, the project was delayed due to environmental concerns but received clearances earlier this year. Once operational, the dam will supply 440–450 MLD of water to Mumbai. The plan includes relocating six villages, compensatory afforestation, installing a hydropower unit, and building supporting infrastructure. Completion is targeted by 2029, enhancing Mumbai’s long-term water security.
The Brihanmumbai Municipal Corporation (BMC) has issued a INR 3,000 crore tender for constructing a 69metre-high dam on the Gargai River in Palghar district, Maharashtra. The project also includes a 1.6km tunnel that will connect the new reservoir to the existing Modak Sagar reservoir, allowing water to flow from Gargai across a hill to Modak Sagar before being supplied to Mumbai. The tunnel is designed with a 2.2 metre diameter to ensure smooth water transport. Advertisement
Once completed, the Gargai dam is expected to add 440–450 million litres per day (MLD) to Mumbai’s water supply, strengthening the city’s long-term water security. This will be Mumbai’s first new reservoir since the Middle Vaitarna Dam started operations in 2014. The project was initially approved in 2013 but was stalled after 2019 due to environmental concerns. Environmental and wildlife clearances were granted earlier this year, allowing construction to finally move forward.
The first year of the project after tendering will focus on final permissions and relocating six villages affected by submergence. Construction of the dam will follow, along with electrical installations and a 1,200 kilowatt hydropower unit to meet energy needs. The project also requires cutting or transplanting approximately 3.1 lakh trees since much of the site falls within the Tansa Wildlife Sanctuary. The BMC has planned compensatory afforestation in other forest areas to offset environmental impact.
The civic body will also develop supporting infrastructure around the reservoir, including administrative offices, a guest house, and an auditorium, ensuring smooth operations and monitoring. Officials aim to complete the project by 2029, which will provide a significant boost to Mumbai’s water supply and help the city manage seasonal shortages more efficiently.
The Gargai dam is a crucial step for Palghar and Mumbai in addressing growing water demand. The project highlights the balance between urban development and environmental responsibility, with careful planning for forest preservation, village relocation, and water management.
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