Top 10 Billion Naira Abandoned Projects in Nigeria

Since independence, successive administrations have committed hundreds of billions of naira to roads, refineries, steel plants, and power projects that were launched with fanfare and abandoned without consequence.

The projects ranked below are assessed using four accountability metrics: capital committed, years of delay, public visibility, and human cost. It is to document, with precision, the cost to Nigerian taxpayers of incomplete infrastructure in money, time, and lives.

Here are the Top 10 Billion Naira Abandoned Projects in Nigeria:

Nigeria’s Top 10 Abandoned Infrastructure Projects 

No.	Project	Sector	Estimated Capital Committed	Years of Delay	Status (2024)
1	Ajaokuta Steel Complex	Industry	$8 billion+	45+ years	Idle / periodic revivals
2	Lagos–Ibadan Expressway	Roads	₦167 billion+	30+ years	Partial completion
3	Port Harcourt Refinery Rehabilitation	Energy	$1.5 billion	20+ years	Ongoing, disputed
4	Mambilla Hydroelectric Power Project	Power	$5.8 billion contracted	45+ years	Stalled at groundbreaking
5	Second Niger Bridge	Roads	₦206 billion+	30+ years	Completed in 2022
6	Abuja–Kaduna–Kano Rail Line Extension	Rail	$1.97 billion Phase 1	10+ years	Partial operations
7	Itakpe–Warri Rail Line	Rail	₦30 billion+	37 years	Commissioned in 2020
8	National Hospital Abuja Specialist Wings	Health	₦12 billion+	15+ years	Incomplete wings
9	Oguta–Nkwerre Road	Roads	₦4.5 billion	12+ years	Abandoned
10	Gurara Water Supply Scheme	Water	₦7 billion+	20+ years	Underutilised

Sources: Budget Office of the Federation, Infrastructure Concession Regulatory Commission, National Bureau of Statistics, and published NNPC and Federal Ministry of Works reports.

1. Ajaokuta Steel Complex

No project captures Nigeria’s infrastructure paradox more clearly than the Ajaokuta Steel Complex in Kogi State. Construction began in 1979 under a Soviet Nigerian technical agreement. 

By most credible estimates, the government has spent more than $8 billion on Ajaokuta over four decades, yet the plant has never produced steel at a commercial scale.

The consequences are structural, not symbolic. Nigeria imports more than 3.5 million metric tonnes of steel annually, costing the country about $3 billion in foreign exchange. That is money the country could have saved if Ajaokuta had become operational.

The plant was designed for a rated capacity of 1.3 million metric tonnes per year. Multiple concession attempts, including the 2004 deal with Global Steel Holdings, which was later revoked, failed to revive it.

The accountability problem is severe. The Bureau of Public Enterprises acknowledged that more than ₦100 billion was spent on rehabilitation efforts between 2002 and 2017 without production. A 2021 National Assembly probe also found that critical blast furnace equipment installed at high cost remains dormant.

2. Lagos–Ibadan Expressway

The 125-kilometre Lagos–Ibadan Expressway is Nigeria’s busiest road corridor. It carries an estimated 35,000 to 50,000 vehicles daily and links Lagos to the country’s western commercial hinterland. 

Rehabilitation has been on the government’s agenda since the early 1990s. As of 2024, full completion remains unfinished after more than three decades of stop-and-start work.

The Federal Government awarded a reconstruction contract in 2013 valued at about ₦167 billion. Since then, supplementary budget allocations and mobilisation payments have pushed actual spending much higher. 

The human cost is measurable. The Federal Road Safety Corps has documented accident fatality rates of more than 200 deaths annually on this corridor, with potholes and construction zone hazards among the major causes.

The economic cost is also significant. The Lagos Chamber of Commerce and Industry estimates that delays on this route cost Nigerian businesses about ₦350 billion annually due to logistics inefficiencies, spoiled goods, and fuel waste.

3. Port Harcourt Refinery Rehabilitation

Nigeria has four refineries with a combined installed capacity of 445,000 barrels per day. Yet as of early 2024, their combined utilisation remained close to zero. The Port Harcourt refinery rehabilitation, awarded in 2021 for $1.5 billion to Italy’s Tecnimont, became one of Nigeria’s most closely watched infrastructure stories.

NNPC announced in November 2023 that the old Port Harcourt refinery had resumed production at around 1,000 barrels per day. 

Independent energy analysts and the Petroleum Products Retail Outlets Owners Association of Nigeria questioned that claim, saying there was no visible impact on domestic supply. Whether the refinery is fully operational or only partially functional remains disputed.

What is not disputed is the scale of the loss. Nigeria’s annual petrol import bill still exceeds $10 billion, a major foreign exchange burden for an oil-producing nation.

4. Mambilla Hydroelectric Power Project

The Mambilla Hydropower Project in Taraba State was first conceived in the 1970s. With a projected installed capacity of 3,050 megawatts, it would be the largest power project in Nigeria’s history.

In 2017, the Buhari administration signed a $5.8 billion engineering, procurement, and construction contract with a Chinese consortium involving CGGC, Sinohydro, and CGCOC. Financing through China Exim Bank was also announced.

By 2024, meaningful physical construction had still not begun. Legal disputes between earlier consultants and the federal government, including a prolonged arbitration process, have continued to stall the project.

Nigeria currently generates roughly 4,000 to 5,000 megawatts against an estimated demand of more than 30,000 megawatts. Mambilla alone could expand current generation capacity by about 60 percent.

Its delay has serious industrial consequences. According to the Manufacturers Association of Nigeria, manufacturers lose around 40 per cent of production time to power-related disruptions.

5. Second Niger Bridge

The Second Niger Bridge belongs on this list not because it is still abandoned, but because it shows the true price of delay. First proposed in the 1970s, meaningful construction did not begin until 2018. 

By the time the bridge was completed in 2022 at a cost exceeding ₦206 billion, independent engineers estimated it could have cost just ₦15 billion to ₦20 billion if built in the 1980s.

That means decades of delay multiplied the eventual cost several times over. In addition, the South South and South East regions bore years of economic losses from dependence on the overstretched First Niger Bridge.

The bridge is now a rare positive example of eventual completion, but it also stands as a warning about what delay destroys.

6. Abuja–Kaduna–Kano Rail Extension

The Abuja–Kaduna standard gauge rail line, completed in 2016 at a cost of about $874 million, was one of Nigeria’s genuine infrastructure successes. But its intended extension to Kano, under a $1.97 billion China Exim Bank-financed agreement, has stalled.

Funding gaps, contractor issues, and administrative changes slowed the project. The existing Abuja–Kaduna route itself was suspended after the March 2022 terrorist attack near Katari Bridge before services resumed in 2023. Kano, one of Nigeria’s largest commercial and industrial cities, remains disconnected from the network it was promised.

7. Itakpe–Warri Rail Line

The Itakpe–Warri narrow gauge railway was originally designed to serve the Ajaokuta steel plant. Construction started in 1983, but the line was not commissioned until 2020, a delay of 37 years. More than ₦30 billion was spent on rehabilitation between 2014 and 2020 alone.

Although it was eventually completed, the line still reflects systemic dysfunction. Its original economic purpose was tied to a steel complex that remains non-functional. So even where delivery finally happened, the wider infrastructure logic remains broken.

8. National Hospital Abuja Specialist Wings

The National Hospital Abuja opened in 1999 as a flagship federal health institution. Over time, several specialist wings, including a burns unit and advanced surgical suites, received contracts worth more than ₦12 billion across different phases. Yet as of 2024, key parts of those facilities remain incomplete.

The human cost is immediate. Nigerians who need specialist treatment still travel abroad in large numbers. The World Bank estimates that medical tourism drains about $1.2 billion from Nigeria every year. Many of the procedures being sought overseas are exactly the kind these unfinished wings were meant to handle locally.

9. Oguta–Nkwerre Road

The Oguta–Nkwerre Road in Imo State received a ₦4.5 billion contract in 2011. Work began, contractors were mobilised, and then the project was abandoned halfway. Communities have since had to deal with failed drainage, exposed road foundations, and difficult movement during the rainy season.

10. Gurara Water Supply Scheme

The Gurara Water Supply Scheme in the Federal Capital Territory was built to serve more than 800,000 residents. It cost over ₦7 billion, but since commissioning, it has operated at only a fraction of its design capacity. The problem has not mainly been construction defects. There has been weak institutional management and poor maintenance.

Frequently Asked Questions

Which is Nigeria’s most expensive abandoned infrastructure project?

The Ajaokuta Steel Complex is widely regarded as Nigeria’s most expensive abandoned infrastructure project. More than $8 billion has been committed to it since construction began in 1979, yet it has never reached commercial steel production.

How much does infrastructure abandonment cost Nigerian taxpayers?

The Nigerian Institute of Quantity Surveyors estimates that completing all identified abandoned federal and state projects would require about ₦12 trillion. That figure does not include indirect losses from lower GDP, medical tourism, fuel imports, and transport inefficiencies.

Why do Nigerian infrastructure projects get abandoned?

The main reasons include discontinuity between administrations, poor feasibility preparation before contract award, foreign exchange shocks, weak contract enforcement, and corruption that turns public projects into rent extraction channels.

Has any previously abandoned infrastructure project in Nigeria been completed?

Yes. The Second Niger Bridge, proposed in the 1970s and completed in 2022, and the Itakpe–Warri Rail Line, started in 1983 and commissioned in 2020, are examples of long-delayed projects that were eventually delivered. But both ended up costing far more than earlier completion would have required.

What is the current status of the Mambilla Hydropower Project?

As of 2024, the Mambilla Hydropower Project, designed to generate 3,050 megawatts and contracted for $5.8 billion in 2017, had not reached meaningful physical construction. Legal and financing issues remain unresolved.

How does Nigeria compare with other African countries on infrastructure abandonment?

Nigeria’s situation is unusually difficult because of the scale of resources committed and lost. Many African countries face infrastructure deficits, but Nigeria, despite being Africa’s largest economy and a major oil producer, has lost more capital to incomplete projects than most comparable countries.