Nigeria has won a huge arbitration battle over the Mambilla hydropower project. But buried inside the victory is something potentially more consequential: a disturbing account of how powerful people, private interests and public office intersected around a project that was supposed to transform Nigeria’s electricity supply.
For more than two decades, the Mambilla Hydroelectric Power Project has existed somewhere between national ambition and national frustration.
A 3,960-megawatt hydroelectric project in Taraba State was supposed to become one of Nigeria's biggest additions to electricity generation.
Instead, Mambilla became entangled in contracts, competing claims, government negotiations, arbitration and allegations of corruption.
Now an International Chamber of Commerce tribunal in Paris has delivered a 616-page final award that has dramatically changed the legal landscape around the project.
Nigeria won.
Sunrise Power and Transmission Company Limited, promoted by businessman Leno Adesanya, failed in its claims against the Federal Republic of Nigeria.
The tribunal rejected Sunrise's demand for hundreds of millions of dollars under a disputed settlement arrangement and rejected its much larger compensation claim connected to the Mambilla project.
It also ordered Sunrise and Adesanya to reimburse Nigeria approximately $11.8 million in legal costs.
But the most explosive part of the judgment may not be the money Nigeria avoided paying.
It may be what the tribunal said about the people and transactions surrounding the project.
And that is why the Economic and Financial Crimes Commission has now reportedly assembled a team to investigate individuals named in the award.
The victory is only the beginning
The federal government has understandably celebrated the arbitration result.
President Bola Tinubu described the outcome as confirmation that Nigeria would not submit to what he called predatory and exploitative claims against the country.
The government also sees the ruling as removing a major legal obstacle to the eventual development of Mambilla.
That is the straightforward part of the story.
Nigeria was facing a potentially enormous financial exposure.
Sunrise had pursued claims running into billions of dollars over the Mambilla dispute.
The tribunal rejected those claims.
But the award also opened a different door.
It examined the behaviour of people who had occupied senior positions in Nigeria and their relationships with the private interests surrounding Sunrise.
That examination produced findings and observations that are now being referred to Nigeria's anti-corruption authorities.
According to PREMIUM TIMES, the EFCC has established a team supervised by Chairman Olanipekun Olukoyede to investigate individuals named in connection with questionable transactions discussed in the award. The EFCC spokesperson, Dele Oyewale, confirmed awareness of the development but said he had not been fully briefed on the details.
That is potentially the beginning of a second Mambilla story.
The first was about whether Nigeria owed Sunrise money.
The second is about what happened behind the contract in the first place.
The $500,000 question
Perhaps the most politically sensitive transaction examined by the tribunal involved a $500,000 payment made in January 2003.
The money was transferred from an offshore company associated with Adesanya to a US bank account belonging to Jennifer Douglas, who was then married to Atiku Abubakar, Nigeria's vice-president at the time.
The timing is what made the payment particularly significant to the tribunal.
The transfer occurred on January 30, 2003.
The Sunrise Mambilla BOT contract was purportedly awarded several months later, on May 22.
The tribunal noted the proximity between the payment and the subsequent contract and said the circumstances raised "significant red flags."
But there is a critical detail that must not be lost in the political noise.
The tribunal did not simply state that Atiku received a $500,000 bribe and convict him of corruption.
That is not what an international commercial arbitration tribunal does.
Instead, it examined evidence presented by Adesanya concerning the transaction and found his explanation inadequately supported by documentation.
Adesanya told the tribunal that the payment represented a foreign-exchange transaction conducted for Atiku through his bureau-de-change business.
But the tribunal noted that Adesanya failed to produce records establishing the underlying naira payment, the exchange rate, instructions from Atiku or his aides, relevant correspondence or documentation showing the commercial purpose of the transaction.
Neither Atiku nor Douglas provided a witness statement supporting that explanation, according to the tribunal's assessment as reported by PREMIUM TIMES.
That leaves an important distinction.
The tribunal identified unanswered questions and red flags. It did not issue a criminal conviction against Atiku.
That distinction matters enormously.
Atiku's response
Atiku has rejected suggestions that the arbitration amounted to an indictment or corruption conviction against him.
His spokesman, Phrank Shaibu, argued that Atiku was not part of the procurement panel that awarded the Mambilla contract and therefore did not award the contract to Sunrise.
Atiku's camp has also challenged political attempts to portray the arbitration award as a criminal judgment against him.
That is a legitimate legal distinction.
An arbitration award is not a criminal trial.
The tribunal was deciding contractual and arbitration questions.
But that does not mean every factual observation inside the award is irrelevant to Nigerian law enforcement.
Quite the opposite.
A commercial tribunal examining evidence can uncover transactions, communications and relationships that may warrant examination by criminal investigators.
That is precisely why the EFCC investigation now matters.
The tribunal has already created a documentary trail.
The EFCC's job, if it investigates, is to determine whether that trail supports an actual offence under Nigerian law.
Then comes Malami
The most severe findings in the award appear to concern former Attorney-General of the Federation and Minister of Justice Abubakar Malami.
Unlike the Atiku issue, where the tribunal highlighted red flags surrounding a payment, the tribunal made substantially stronger findings concerning Malami's dealings with Adesanya.
The tribunal concluded that a corrupt deal was reached between Malami and Adesanya concerning a settlement agreement and its subsequent addendum.
It said the arrangement was tainted by corruption and therefore rendered the agreements unenforceable against Nigeria.
The underlying dispute concerned a settlement that could have exposed Nigeria to approximately $400 million — comprising a $200 million settlement sum and another $200 million default payment — alongside interest.
The tribunal concluded that the officials who signed the settlement did not have the authority to bind Nigeria without the required presidential approval.
But it went further.
It examined Malami's communications and conduct during the negotiations.
The tribunal said there were multiple red flags, including changes in Malami's position, attempts to secure presidential approval after President Muhammadu Buhari had rejected the arrangement, and communications between Malami and Adesanya that the tribunal regarded as improper.
It also criticised Malami for failing to appear before the tribunal to give evidence.
Those are findings in the arbitration award, not merely allegations from a political opponent.
That makes the Malami portion of the case particularly significant.
The Buhari connection
The story becomes even more striking when the former president enters the picture.
According to the tribunal's findings reported by PREMIUM TIMES and TheCable, Malami repeatedly sought approval for aspects of the settlement despite Buhari's position.
The tribunal said Malami provided Buhari with information about the proposed settlement and continued pursuing approval.
It ultimately concluded that the settlement arrangement could not bind Nigeria because the necessary presidential authority had not been obtained.
This is one of the central lessons of the Mambilla saga.
Nigeria's problem was not merely that a controversial contract existed.
It was that a series of officials, private actors and intermediaries interacted around the project in ways that created enormous legal and financial consequences for the Nigerian state.
A project that was supposed to produce electricity instead generated years of litigation.
Then there was Sambo Dasuki's son
The tribunal also examined a much larger payment involving Abubakar Dasuki, son of former National Security Adviser Sambo Dasuki.
The payment was approximately $1.74 million.
Adesanya reportedly described it as a loan.
But the tribunal found problems with that explanation.
It noted the absence of a loan agreement and inconsistencies in the evidence concerning how the transaction was accounted for by Sunrise.
The tribunal therefore described the transaction as raising considerable red flags.
Again, caution is necessary.
A transaction being questioned by a tribunal does not automatically mean the recipient committed a crime.
The relevant question for the EFCC is what the money actually represented.
Was it a loan?
Was it a commercial transaction?
Was it connected to the Mambilla project?
Was it a payment for influence?
Was there an obligation attached to it?
Where did the money ultimately go?
Those are investigative questions.
Agunloye and the "medical expenses"
Former Power and Steel Minister Olu Agunloye is another important figure in the story.
He was the minister when Sunrise's Mambilla BOT arrangement emerged in 2003.
The tribunal examined payments associated with Agunloye that he reportedly characterised as medical expenses.
He is already facing criminal proceedings in Nigeria relating to the Mambilla project, including allegations involving forgery, gratification and disobedience to presidential directives.
The EFCC has previously brought charges against him concerning the project.
The arbitration award therefore lands in the middle of an existing criminal-justice process rather than creating the issue from scratch.
That makes the next stage especially important.
Investigators now have an international tribunal's factual record to compare with evidence already gathered in Nigeria.
The strangest defence: "Nigerian culture"
One of the most revealing details from the award emerged in a later report by PREMIUM TIMES.
Sunrise reportedly attempted to explain some of the payments to Nigerian officials by referring to "Nigerian culture."
The company's position was challenged by Nigerian expert witness Professor Ebenezer Obadare, who argued that Nigerian cultural practices could not be used to justify bribery or corruption.
The argument is revealing because it points to a deeper problem.
Nigeria has spent decades struggling with the language used to normalise questionable transactions.
"Facilitation."
"Appreciation."
"Settlement."
"Medical expenses."
"Consultancy."
"Foreign exchange."
"Loan."
"Culture."
The labels can change.
The fundamental question does not:
What was the money actually for?
That is ultimately what investigators must establish.
The Mambilla project is bigger than one arbitration
It is easy to get lost in the personalities.
Atiku.
Malami.
Dasuki.
Agunloye.
Adesanya.
Buhari.
But the real victim in this story, if the allegations and findings about corruption are ultimately established through proper legal processes, would not be one politician or another.
It would be the Nigerian public.
Because Mambilla was not supposed to be a private enrichment scheme.
It was supposed to be a national infrastructure project.
A 3,960MW hydroelectric project has enormous implications for an electricity-starved economy.
Every year of delay has an economic cost.
Factories require electricity.
Hospitals require electricity.
Businesses require electricity.
Households require electricity.
Data centres require electricity.
Transport infrastructure increasingly requires electricity.
And yet Mambilla has remained stuck in legal and contractual disputes for years.
This is the real tragedy of Mambilla
Nigeria has repeatedly demonstrated that it can announce enormous infrastructure projects.
The harder part is getting them built.
Mambilla was conceived decades ago.
The country has spent years negotiating, contracting, cancelling, litigating and arbitrating.
Now, after Nigeria's victory in Paris, the federal government says a major legal obstacle has been removed.
But a legal victory is not the same thing as a completed power station.
The turbines are not spinning.
The 3,960MW is not yet entering Nigeria's electricity grid.
The communities around the project have not suddenly received reliable electricity.
The factories that need power are not suddenly operating on Mambilla electricity.
Nigeria has won the court battle.
It still has to win the construction battle.
And that is where accountability becomes important
The EFCC investigation should not become another political spectacle.
It should follow the money.
Not the party.
Not the presidential candidate.
Not the politician's popularity.
Not the election calendar.
The money.
If the $500,000 payment was legitimate, investigators should establish that.
If the $1.74 million transaction was a genuine loan, the documentation should establish that.
If payments described as medical expenses had legitimate purposes, the records should establish that.
If Malami's conduct constituted offences under Nigerian law, the evidence should establish that.
And if some allegations cannot be substantiated, that should also become part of the public record.
That is how a serious anti-corruption investigation works.
The danger is turning an arbitration award into a political weapon
Already, the Mambilla ruling has entered Nigeria's 2027 political battlefield.
The APC Presidential Campaign Council has called on Atiku to withdraw from the presidential race over the revelations.
Atiku's camp has rejected that interpretation and accused the APC of converting an arbitration award into a political verdict.
Both statements are political claims.
Neither changes what the tribunal actually decided.
The public deserves the underlying document, the relevant passages and the distinction between:
a finding,
an allegation,
an evidentiary concern,
an arbitration determination,
and
a criminal conviction.
Those categories should never be collapsed simply because an election is approaching.
The bigger question: who owns Nigeria's infrastructure failures?
Mambilla is ultimately about more than corruption.
It is about the consequences of institutional failure.
When public projects become entangled in opaque transactions, competing interests and weak oversight, the consequences are not abstract.
They become electricity shortages.
Higher costs.
Lost investment.
More generators.
More diesel.
More pollution.
More pressure on businesses.
More expensive production.
And another generation asking why Nigeria has enormous plans but struggles to deliver them.
A 3,960MW power station exists on paper for much longer than it exists in reality.
That is the brutal arithmetic of infrastructure.
The ICC award has reopened the case. Now Nigeria has to finish the job.
The Paris tribunal has effectively closed one chapter.
Sunrise's major claims against Nigeria have failed.
Nigeria has been awarded its legal costs.
And the tribunal has produced an extraordinary factual record about the relationships, transactions and negotiations surrounding the Mambilla project.
But the next chapter belongs to Nigerian institutions.
The EFCC has reportedly begun its work.
The courts already have proceedings involving some of the individuals connected to the project.
The government says the legal barrier to Mambilla has been substantially reduced.
Now the public should demand something very simple:
Follow the money — and build the dam.
If wrongdoing occurred, prosecute it through due process.
If people were wrongly implicated, establish that through evidence.
If public officials abused their positions, hold them accountable under the law.
And if Mambilla is finally free of its legal entanglements, then the government must do what successive governments have failed to do:
turn 23 years of promises into electricity.
Because Nigeria does not need another victory speech about Mambilla.
It needs turbines.
It needs transmission lines.
It needs electricity.
And it needs to know how a project that was supposed to power the country became a $2.35-billion legal battlefield in the first place.
The arbitration may have settled the bill.
It has not yet settled the questions.
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