Property – Construction & Engineering · Editorial
By Moakanyi Magazine · China-in-Africa · June 2026
The familiar caricature of Chinese lending in Africa is cheap money with hidden strings. The Bui hydropower dam in Ghana complicates it from the other direction: the financing was not especially cheap, and the strings were the ordinary ones of a commercial contract. Ghana built Bui to add firm generation capacity after a power crisis – and it paid close to market rates to do so.
A World Bank appraisal of the surrounding programme sets out the terms in unsentimental detail. Bui is best read not as aid but as a capacity purchase, financed on conditions a finance ministry would recognise anywhere – a fixed price, a commercial rate, a repayment schedule and a counterparty risk that sits squarely with Accra. Strip away the geopolitics and what remains is a procurement decision: a government short of firm power bought 400 MW of it, on credit, from the one supplier willing to both build and finance the asset in a single package.
A 400 MW answer to the 2006-2007 crisis
Bui was conceived against the backdrop of Ghana's 2006-2007 power crisis, which cut hydroelectric capacity by 25 to 30 per cent and exposed the grid's dependence on a single major dam at Akosombo. When a drought drained one reservoir, much of the national supply went with it. The World Bank documentation records a proposed installed capacity of 400 MW and roughly 1,000 GWh of annual generation – a second large hydro anchor on the Volta system, intended to spread that concentration risk across two dams instead of one.
The plant was later commissioned in 2013, and is now commonly rated at 404 MW – a meaningful block of dispatchable power for a system whose peak demand it helps to cover. For a country that had just watched a single dry season knock out a quarter of its hydro, a second anchor was less an expansion than an insurance policy.
Bui was bought to end the country's reliance on one dam – by building a second.
US$292 million, 6.1 per cent, zero grant element
The financing came through a US$292 million loan agreement with China Exim Bank, at an average commercial interest rate of 6.1 per cent, amortised over 17 years with a five-year grace period. The appraisal records a zero grant element – in plain terms, this was a loan priced as a loan, not concessional aid dressed as one. The five-year grace period mattered: it deferred repayment until the dam was generating and earning, lining the debt service up behind the revenue.
Sinohydro Corporation was contracted to finance and construct the dam under a Build-Operate-Transfer arrangement with the Bui Power Authority, a statutory body created in 2007 to own and run the asset. The structure put a Chinese state contractor on the build and a Ghanaian public authority on the title. Read against the caricature of opaque, ultra-concessional Chinese lending, Bui is striking for how conventional it was – a recognisable project-finance shape, with the commercial rate stated and the grant element explicitly nil.
The Build-Operate-Transfer shape is worth pausing on, because it allocates the risk in a particular way. During the operate years the contractor and lender are repaid out of the plant's revenue; only at transfer does the asset pass fully into Ghanaian hands. The Bui Power Authority, created the same year, exists precisely to be the public counterparty that takes the title at the end – and to carry the operating responsibility long after the Chinese parties have been paid out and have left.
At 6.1 per cent with no grant element, Bui was a mortgage on megawatts, not a handout.
The hydrology risk underneath the return
The appraisal estimated an 8.0 per cent rate of return for the power plant but flagged uncertainty tied to hydrological risk – the dam's output rises and falls with the Black Volta. A hydro asset is only as firm as its river, and a dry year converts confident projections into shortfalls. The very crisis Bui was built to answer – drought hollowing out hydro – was also the risk it could not engineer away, because it shared the same exposure to rainfall as the dam it was meant to back up.
That single vulnerability shaped everything Ghana did next at Bui. A 400 MW plant whose output swings with rainfall is a capacity anchor with a seasonal flaw, and a commercial loan does not pause when the river drops – the 6.1 per cent accrues whether the turbines spin at full or half. The fix would not be more concrete.
The dam's weakness was never the loan – it was the river the loan depended on.
A 40-to-50-year asset on a 17-year loan
The appraisal framed Bui as clean generation lasting 40 to 50 years at stable, declining real-term costs – an asset that long outlives its 17-year repayment schedule. That mismatch is the case for the deal: pay over 17 years, generate for half a century, and the unit cost of power falls in real terms as the debt is retired and only operating costs remain.
It is also the case for scrutiny. The economics only hold if the river cooperates and the authority maintains the plant across decades when the original lenders and contractors are long gone. A dam that earns out depends on upkeep no loan document can guarantee – silt management, turbine overhaul, a competent operator forty years on. Bui shows that the question worth asking of Chinese-financed infrastructure is rarely whether the loan was cheap; it is whether the asset earns out over its life.
A 50-year dam settles its 17-year loan only if someone keeps it running for the other 33.
What Bui means beyond Ghana
For the continent, Bui is a useful corrective to a lazy debate. Chinese hydropower finance is neither uniformly predatory nor uniformly generous; here it was simply commercial, on terms a borrower could read in advance. The harder lessons are structural: build a second hydro anchor and you may still share the first one's drought risk, and a commercial loan turns a dry year into a financing problem as much as a power one. The countries lining up similar dams inherit both the capacity and that exposure.
The deeper continental point is about what the 6.1 per cent and the zero grant element actually mean. A commercial loan disciplines a project in a way concessional aid does not – it forces the borrower to treat the dam as a revenue asset that must earn its repayment, not a gift to be enjoyed. That discipline is a benefit when the river runs and a burden when it does not. For a finance ministry, the Bui template says the question to settle before signing is not how friendly the lender is, but whether the asset can carry a market rate through the dry years as well as the wet ones.
Ghana bought firm power and a familiar loan – and learned the river still set the terms.
Sources: World Bank (project appraisal), Bui Power Authority
