Afcons Secures ₹2,241-Cr Mumbai Desalination Tunnel Project

Jyoti Rathi - Kolkata Bureau Aug 06, 2026 1,150 Views

Afcons Infrastructure Ltd has secured a ₹2,241.3-crore contract from the BMC to construct a 7.2 km underground water tunnel linking the Manori desalination plant to Mumbai's distribution network. The initiative fortifies the metropolis's municipal water infrastructure and guarantees long-term drought mitigation.

Mumbai advances its water security strategy as municipal authorities award a major underground water conveyance tunnel contract to Afcons Infrastructure Ltd.

Mumbai Approves Landmark Desalination Water Tunnel Project

The Brihanmumbai Municipal Corporation (BMC) has officially cleared a proposal to award a ₹2,241.3-crore contract to Afcons Infrastructure Ltd for the design and construction of an underground water conveyance tunnel in Mumbai. Announced following civic standing committee approvals, the project involves a 7.2-kilometre tunnel engineered to transport treated water from the upcoming seawater desalination plant at Manori into the city's primary distribution network.

The critical infrastructure development addresses Mumbai’s heavy reliance on monsoon-fed reservoirs by tapping into alternative water sources. By integrating desalinated seawater directly into western suburban networks such as Kandivali, Borivali, and Malad, the city aims to build long-term resilience against climate variability and rapid urban expansion.

Technical Scope and Engineering Framework

The subterranean project features a complex layout running 7.2 kilometres largely beneath Gorai Creek, linking Manori to Charkop Municipal Garden and extending to Mahavir Nagar in Kandivli. According to technical blueprints, the tunnel will be excavated at depths ranging from 104 to 128 metres using two advanced Tunnel Boring Machines (TBMs) operating simultaneously.

While the initial phase of the Manori desalination plant is designed to yield 200 Million Litres per Day (MLD), the conveyance tunnel and associated pumping infrastructure are built to accommodate an ultimate capacity of 400 MLD. This future-ready design allows municipal authorities to expand water production later without requiring major structural retrofitting.

Practical Implications for Citizens and Urban Businesses

For residents across Mumbai's western suburbs, the project represents a vital step toward a reliable, drought-resistant drinking water supply. By injecting treated desalinated water into the grid, the civic body can reallocate existing supplies from distant sources like the Bhandup complex to other supply-deficient zones, improving overall distribution efficiency.

For commercial enterprises, real estate developers, and local businesses, a diversified water matrix mitigates the economic vulnerabilities historically tied to deficient monsoons and seasonal water cuts.

Official Sources and Regulatory Disclosures

According to official announcements and civic administrative reports, the tender evaluation identified Afcons Infrastructure Ltd as the lowest qualified bidder after a competitive bidding process. Project monitoring will be executed alongside project management consultants to ensure strict adherence to safety, environmental, and engineering standards.

"According to officials...," the project timeline targets completion within 45 months, synchronizing the tunnel's readiness with the commissioning schedule of the Manori desalination facility.

Key Facts at a Glance

Project Value: Approximately ₹2,241.3 crore including construction, taxes, and operational components.
Contractor: Afcons Infrastructure Ltd.
Tunnel Dimensions: 7.2 kilometres in length, running deep underground from Manori through Charkop to Mahavir Nagar.
Capacity: Designed for an initial 200 MLD flow with a structural future potential of 400 MLD.

Frequently Asked Questions

What is the primary purpose of the Mumbai water tunnel project?

The tunnel will transport treated drinking water from the upcoming Manori desalination plant into Mumbai's existing western suburban distribution network.

Who was awarded the construction contract?

The BMC standing committee approved awarding the contract to Afcons Infrastructure Ltd.

What is the total estimated cost of the project?

The approved project cost stands at approximately ₹2,241.3 crore.

Where can stakeholders review official civic proposals and updates?

Official project updates and municipal circulars can be tracked directly via the Brihanmumbai Municipal Corporation (BMC) and financial regulatory filings on the Bombay Stock Exchange (BSE).