The 1972 World Bank NEPA Loan was one of the earliest major international financing agreements undertaken by Nigeria’s newly established National Electric Power Authority. On 30 June 1972, the World Bank and NEPA signed Loan 847-UNI for $76 million, backed by a guarantee from the Federal Republic of Nigeria.
The agreement arrived at a pivotal moment. Nigeria was emerging from the civil war, which had ended in January 1970. Reconstruction was under way, petroleum revenues were beginning to transform public finances, cities were expanding and electricity demand was rising rapidly.
The project formed part of an ambitious effort to create an integrated national electricity system capable of serving industries, commercial centres, towns and a growing urban population. It financed new generating capacity at Kainji, additional transmission infrastructure, reinforcement of substations, expansion of distribution networks and technical programmes intended to strengthen electricity management.
Major infrastructure was eventually completed, but implementation took longer than planned, costs increased and NEPA struggled to achieve the managerial and financial improvements expected alongside physical expansion.
More than five decades later, the Fourth Power Project remains an important chapter in the history of Nigerian electricity.
The Creation of NEPA
The National Electric Power Authority emerged from the merger of two major public electricity bodies: the Electricity Corporation of Nigeria, commonly known as ECN, and the Niger Dams Authority, or NDA.
The National Electric Power Authority Decree No. 24 of 1972 was deemed to have come into operation on 1 April 1972. Under the legislation, 1 June 1972 became the vesting date on which the property, rights, liabilities and obligations of the Electricity Corporation of Nigeria and the Niger Dams Authority passed to NEPA.
The predecessor organisations were dissolved, and the new Authority assumed responsibility for developing and maintaining an efficient, co-ordinated and economical electricity supply system for the federation.
NEPA brought electricity generation, bulk transmission and public supply under one national organisation.
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The World Bank’s Executive Directors approved the Fourth Power Project loan on 29 June 1972. The loan and guarantee agreements were signed on 30 June 1972.
The financial terms provided for repayment over 25 years, including a five-and-a-half-year grace period, at an annual interest rate of 7.25 per cent.
The loan became effective on 26 June 1973.
Why It Was Called the Fourth Power Project
The name “Fourth Power Project” reflected the sequence of World Bank lending to Nigeria’s electricity sector.
The Bank’s first Nigerian power-sector loan, Loan 372-UNI for $30 million in 1964, went to the Electricity Corporation of Nigeria for transmission and distribution facilities.
A second loan, Loan 383-UNI for $82 million, was made to the Niger Dams Authority in 1964 to support the Kainji development and its associated 330 kV transmission network.
A third operation, Loan 572-UNI for $14.5 million in 1968, provided supplementary financing connected with completion of the Kainji project.
The 1972 World Bank NEPA Loan, Loan 847-UNI, followed these earlier operations and became a major programme undertaken by the newly created National Electric Power Authority.
What the 1972 World Bank NEPA Loan Financed
The Fourth Power Project contained several major components.
At Kainji, it provided for the installation of two additional generating units of approximately 100 MW each, adding about 200 MW of generating capacity.
Associated works included switchgear and equipment connected with the high-voltage network.
The programme also provided transformers, capacitors, reactors and related switchgear for major 330 kV substations.
One of its most strategically important elements was a second 330 kV transmission line from Kainji towards Lagos, extending for roughly 420 kilometres.
The additional high-voltage route was intended to strengthen electricity supply towards Lagos, Nigeria’s largest commercial and industrial centre.
The project also involved extensions and improvements at major substations along the interconnected network.
Distribution formed another important part of the programme. The original scheme provided for reinforcement and extension of electricity systems in 43 cities and towns, together with the electrification of 41 townships through connection to the Kainji grid.
The project therefore combined generation, transmission, substations and local distribution with long-term development studies, management studies and technical assistance.
Building a National Electricity System
Nigeria was attempting to expand its electricity network at extraordinary speed during the early 1970s.
NEPA had inherited organisations with different functions, operating traditions and administrative structures. At the same time, electricity demand was increasing as the Nigerian economy expanded.
The Fourth Power Project included measures intended to strengthen system planning, management, operations, finances and staff development.
Nigeria was simultaneously merging major electricity institutions, increasing generating capacity, extending transmission lines and connecting additional communities to electricity.
The rapid growth associated with the oil boom placed further pressure on the sector. Electricity demand grew quickly, while NEPA required increasing numbers of engineers, technicians and managers capable of operating an expanding national system.
During the 1970s, Nigeria constructed substantial new electricity infrastructure as the interconnected grid expanded across the country.
The scale of the programme demonstrated the government’s determination to build a national electricity network capable of supporting industrialisation, urban growth and economic development.
Delays and Rising Project Costs
The Fourth Power Project eventually produced major physical infrastructure, but completion took longer than originally anticipated.
At appraisal, physical completion was expected around September 1977.
The World Bank’s later Project Performance Audit recorded actual physical completion in May 1981.
Some distribution components experienced delays ranging from approximately five to 36 months. Project-management difficulties, shortages of skilled personnel, changing requirements, inflation and logistical pressures affected implementation.
The distribution programme also expanded during implementation.
The original project envisaged reinforcement of electricity systems in 43 cities and towns and electrification of 41 townships. The later programme grew substantially, and the World Bank’s project audit described a broader countrywide electrification programme involving 73 towns.
Project expenditure also increased.
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At appraisal, total project cost was estimated at approximately ₦82.9 million, equivalent under the exchange assumptions used at the time to about $126 million.
Actual expenditure was recorded at approximately ₦111.2 million, an increase of about 34 per cent in naira terms. The corresponding dollar equivalent recorded in the audit was approximately $177.9 million.
A large share of the increase was associated with the expanded distribution
and electrification programme.
The $76 million World Bank loan financed only part of the total project expenditure. Other resources were required to complete the programme.
A Major Expansion With Institutional Difficulties
The Fourth Power Project produced substantial physical results.
The additional Kainji generating units were installed. High-voltage transmission infrastructure was completed. Substations were expanded and reinforced. Distribution facilities and electrification schemes were implemented.
The World Bank’s 1985 performance audit regarded the project’s technical achievements favourably.
Institutional performance was weaker.
NEPA’s institutional performance was assessed as below expectations, while its financial results also failed to meet the target envisaged under the lending arrangements.
The project had aimed for a minimum financial return of 8 per cent on net fixed assets in operation. The later audit recorded a return of about 5 per cent on a non-revalued asset base.
Maintenance, distribution performance, staff capability and financial management remained significant problems.
The expansion of transmission infrastructure also revealed the importance of local distribution networks. Extending high-voltage electricity infrastructure towards communities could not by itself guarantee reliable supply if local networks were inadequate or electricity demand remained insufficiently developed.
Generation, transmission and distribution had to advance together.
Installed Capacity and Available Electricity
The Fourth Power Project also illustrates an important feature of electricity systems: installed generating capacity is not the same as electricity actually available for use.
Generating equipment may exist but be unavailable because of maintenance requirements, hydrological conditions, fuel shortages, technical faults or wider system limitations.
The distinction remained visible decades after the NEPA era.
In the first quarter of 2026, the Nigerian Electricity Regulatory Commission assessed 28 grid-connected power plants with total installed capacity of 13,625 MW.
Their average available generation capacity during the quarter was 4,457.96 MW, while average hourly grid generation stood at 4,112.72 MWh/h.
NERC also recorded a complete national-grid collapse on 23 January 2026 and a partial collapse on 27 January 2026.
Nigeria’s modern electricity industry is institutionally very different from the vertically integrated system once controlled by NEPA, but the relationship between installed infrastructure and dependable electricity remains a central issue.
Distribution and Commercial Challenges
Physical infrastructure has never been the only factor determining the performance of Nigeria’s electricity sector.
Distribution losses, revenue collection, tariffs, maintenance and financial sustainability have long influenced the ability of electricity organisations to provide dependable service.
In the first quarter of 2026, NERC reported aggregate technical, commercial and collection losses of 37.44 per cent across Nigeria’s distribution companies, compared with a regulatory target of 16.92 per cent.
The Commission estimated the resulting cumulative revenue loss at approximately ₦140.64 billion.
Government financial support also remained substantial. During the same quarter, the Federal Government absorbed approximately ₦358.32 billion, about 52 per cent of generation costs, through electricity subsidies associated with the freezing of end-user tariffs at July 2024 levels.
NEPA no longer exists, and Nigeria’s electricity industry has undergone extensive legal, regulatory and structural reforms.
Nevertheless, the history of the Fourth Power Project highlights a question that remains fundamental: how can substantial investment in electricity infrastructure be transformed into reliable and financially sustainable service?
Conclusion
The 1972 World Bank NEPA Loan marked an important stage in the construction of Nigeria’s national electricity system.
Loan 847-UNI placed $76 million of World Bank financing behind a programme that included approximately 200 MW of additional generating capacity at Kainji, reinforcement of major substations, a second 330 kV transmission connection towards Lagos, distribution expansion, town electrification, planning studies and management assistance.
Nigeria obtained substantial physical infrastructure. The national grid expanded, generating capacity increased and additional towns became connected to electricity networks.
The programme was also delayed, costs increased and NEPA’s managerial and financial development did not advance as quickly as the physical system.
The Fourth Power Project therefore occupies an important place in Nigerian economic and infrastructure history. It demonstrates the scale of the country’s investment in electricity during the post-war and oil-boom years while also showing that successful construction alone could not guarantee dependable power.
The longer challenge was maintaining infrastructure, strengthening distribution, building competent institutions and creating a financially sustainable electricity system capable of serving consumers reliably.
More than five decades after the 1972 agreement, those questions remain central to Nigeria’s electricity sector.
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Author’s Note
The Fourth Power Project demonstrates that national electricity development depends on more than constructing generating stations and transmission lines. Nigeria’s experience after 1972 showed that infrastructure must be supported by capable management, effective maintenance, strong distribution networks and sustainable finances. The enduring lesson of the project is that investment becomes truly transformative only when physical expansion produces dependable electricity for the people, businesses and industries it was designed to serve.
References
Federal Military Government of Nigeria. National Electric Power Authority Decree No. 24 of 1972. Supplement to the Official Gazette, 1972.
World Bank. Report and Recommendation of the President to the Executive Directors on a Proposed Loan to National Electric Power Authority with the Guarantee of the Federal Republic of Nigeria for a Fourth Power Project. Report P-1108, 19 June 1972.
World Bank. Appraisal of the Fourth Power Project, National Electric Power Authority, Nigeria. 1972.
World Bank Operations Evaluation Department. Project Performance Audit Report: Nigeria Fourth Power Project, Loan 847-UNI. 22 November 1985.
Nigerian Electricity Regulatory Commission. First Quarter 2026 NERC Quarterly Report. Published 2 July 2026.
