A courtroom recalibration has reshaped — but not derailed — a hefty arbitral award in the long-running financial dispute over Mumbai’s first metro corridor.
The Bombay High Court has partly upheld an award exceeding ₹1,100 crore in favour of Mumbai Metro One Private Ltd (MMOPL) in its battle with the Mumbai Metropolitan Region Development Authority (MMRDA). The case centres on spiralling costs and delays in constructing the Versova–Andheri–Ghatkopar Metro-1 line — the city’s first modern metro stretch.
Presiding over the matter, Justice Sandeep V. Marne underscored a key principle of arbitration law: courts do not function as appellate forums over arbitral tribunals. Under Section 34 of the Arbitration and Conciliation Act, judicial interference remains tightly confined. Re-examining evidence, the judge made clear, is not part of that mandate.
Yet restraint did not translate into blanket approval.
The Project That Doubled in Cost
MMOPL — promoted by Anil Ambani’s Reliance Infrastructure — was awarded the contract to build and operate the elevated corridor under a long-term concession agreement. Originally pegged at ₹2,356 crore and slated for completion within five years, the project ultimately began commercial operations in June 2014 after prolonged delays and substantial cost overruns.
At the heart of the dispute was access. MMOPL argued that MMRDA’s delay in handing over clear right of way, depot land and casting-yard sites inflated costs dramatically. A three-member arbitral tribunal — by a 2:1 majority — accepted much of that argument in 2023, directing MMRDA to pay roughly ₹496 crore plus interest. With interest calculated up to May 31, 2025, the amount swelled to ₹1,169 crore.
MMRDA challenged the award.
The High Court agreed with the tribunal’s finding that delays attributable to MMRDA had materially driven up the project cost — which ballooned to approximately ₹4,026 crore. It also endorsed the conclusion that MMOPL was entitled to compensation beyond merely extending the concession period.
“Guesswork Is No Substitute for Evidence”
But the Court drew a firm line where proof was thin.
Three significant components of the award were struck down:
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₹100 crore for additional overheads and supervision during the extended construction phase
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₹125 crore towards extra interest and financing costs
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₹23.47 crore claimed as opportunity cost or loss of profits
The reasoning was blunt. Where evidence can be produced but is not, an arbitral tribunal cannot fall back on approximation. As the Court observed in substance, conjecture cannot replace documentation; estimation is permissible only when precise calculation is impossible — not when it is merely inconvenient.
In effect, the Court preserved the spine of the award while pruning what it saw as unsupported limbs.
The Money Already Parked
As the litigation unfolded, MMRDA deposited ₹560.21 crore — roughly half the award as of late May — with the High Court, following a modification of an earlier order that had required the full amount to be deposited for a stay.
With the award now modified, the Court has asked the parties to submit revised calculations reflecting the payable sum. The funds are to be released in accordance with financing arrangements — but only after eight weeks.
The Metro-1 corridor may have been running for over a decade, but its financial tracks are still being laid — this time in court.
